US3919876A - Toggle press - Google Patents

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Publication number
US3919876A
US3919876A US522882A US52288274A US3919876A US 3919876 A US3919876 A US 3919876A US 522882 A US522882 A US 522882A US 52288274 A US52288274 A US 52288274A US 3919876 A US3919876 A US 3919876A
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United States
Prior art keywords
ram
absorbing means
thrust
thrust absorbing
toggle linkage
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US522882A
Inventor
Fransiscus Cornelius Bakermans
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FCI Americas Technology LLC
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EI Du Pont de Nemours and Co
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Assigned to BERG TECHNOLOGY, INC. reassignment BERG TECHNOLOGY, INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: E.I. DU PONT DE NEMOURS AND COMPANY
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B1/00—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen
    • B30B1/10—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen by toggle mechanism
    • B30B1/14—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen by toggle mechanism operated by cams, eccentrics, or cranks
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/18—Mechanical movements
    • Y10T74/18056—Rotary to or from reciprocating or oscillating
    • Y10T74/1816—Crank, lever, toggle, and slide
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/869—Means to drive or to guide tool
    • Y10T83/8821—With simple rectilinear reciprocating motion only
    • Y10T83/8841—Tool driver movable relative to tool support
    • Y10T83/8845—Toggle links, one link pivoted to tool support

Definitions

  • a programmable press comprising a frame including a base, a toggle linkage mounted in the frame, a first reciprocal ram connected to the first toggle link, a second reciprocal ram connected to a second toggle link, a first thrust absorbing member, and a second thrust absorbing member for engagement between the second reciprocal ram and the first thrust absorbing member.
  • the toggle linkage is urged away from the base, and when the toggle linkage is extended, the second ram is driven against the second thrust absorbing member, and the first ram idles a distance above the base.
  • This invention relates to toggle-driven presses, and particularly relates to a press in which a tool-carrying ram is reciprocated and engaged with a tooling station to perform a work function on one or more workpieces positioned at the tooling station.
  • Toggle-driven presses including a ram connected to a free end of one toggle link are described in U.S. Pat. No. 2,986,947, and U.S. Pat. No. 3,174,347, U.S. Pat. No. 3,270,665 and U.S. Pat. No. 3,795,168.
  • the above-mentioned patents describe toggle-driven presses including a toggle link adjustably connected to a frame for controlling the stroke or force of the ram.
  • a punch press including a toggle-linkage actuatable by a pair of horizontal arms connected at one end to one of the toggle links is described in U.S. Pat. No. 2,851,888.
  • Each arm has a slot engaging the pin of the crank and is free to idle until a trigger operated lever system is manually operated to move a latch member into engagement with the horizontal arms and actuate the toggle links.
  • Another toggle press including a first and second linkage of opposed angularity is described in U.S. Pat. No. 3,661,008.
  • the second toggle linkage is connected to a stationary point and is shorter than the other link of the second toggle linkage so that the press slide spends a greater part of its operating cycle near the top of its stroke removed from the thrust member, than it does near the bottom of the stroke close to the thrust member. This provides for a feed mechanism to operate over a longer interval during each cycle of the press.
  • the press of the present invention in addition to providing increased time and clearance for performing feed and other functions at the tooling station under a reciprocal ram, provides for programming the engagement of tooling mounted on the ram at the tooling station at a selected interval during a machine cycle.
  • a press comprising,
  • a frame including a base for receiving a workpiece
  • a first ram connected to a first link of the toggle linkage for reciprocally engaging a workpiece positioned on the base
  • first thrust absorbing means fixedly mounted to the frame away from the base
  • a second ram connected to a second link of the toggle linkage for reciprocally engaging the first thrust absorbing means
  • the second thrust absorbing means for engaging between the second ram and the first thrust absorbing means, the second thrust absorbing means having a thickness substantially equal to the spaced distance between the first ram and said base, so that engagement of the second thrust absorbing member between the second thrust absorbing member and the second ram causes the first ram to reciprocally engage the workpiece positioned on the base when the toggle linkage is extended.
  • First and second drive means are provided for, respectively, extending the toggle linkage and for engaging the second thrust absorbing means
  • third drive means is provided connected to the first and second drive means for controlling the extension of the toggle linkage and the engagement of the second thrust absorbing means; so that the first ram is reciprocated to engage the workpiece at a selected interval ofa cycle of the third drive means
  • the second thrust absorbing means is a member rotated parallel to the base through the second drive means.
  • a spring mounted dog is provided for engaging the second thrust absorbing member between the second ram and the first thrust absorbing means.
  • the press assembly of the present invention provides for operation at higher speeds with increased time and clearance of the reciprocal ram for performing feed and other work functions at the tooling station, thus enabling work feed and other functions to be performed over a greater interval of the press cycle time.
  • the rotatable thrust member may be programmed to engage the first ram with the tooling station during any prescribed interval over the press cycle. This feature provides for driving other machine functions, e.g., workpiece feed, in sequence with the main press drive.
  • FIG. 1 is a diagramatic view in perspective of an apparatus embodying the invention.
  • FIG. 2 is a partially broken-away elevation view of the apparatus of FIG. 1.
  • FIG. 3 is a partially broken-away plan view of the apparatus of FIG. 1.
  • FIG. 4 is a partially broken-away elevation view of another apparatus embodying the invention.
  • the apparatus of the invention comprises a frame 10 having a base 12 with side members 14, and end member 16.
  • Cross members 18 and 20 and mounting plate 24 are provided between spaced upstanding side members 14 (one shown).
  • the main drive assembly 30 is mounted in frame 10. Drive assembly 30 is connected to eccentric drive 32 which extends the press toggle drive linkage 34. Drive assembly 30 is also connected to the thrust plate drive 36 and rotates thrust plate assembly 38 parallel to the base 12.
  • the drive assembly 30 includes a motor 40 mounted on base 12. Belt 41 on pulleys 43 and 45 drives main drive input shaft 42 journaled in bearings 44 in side members 14. An eccentric 46 is mounted on input shaft 42. A rod 48 is connected between eccentric 46 and toggle linkage 34. Drive gear 50 on input shaft 42 drives the thrust plate drive assembly 36.
  • the toggle linkage 34 comprises a first toggle link 54 and a second toggle link 56 connected together at a knuckle 58.
  • the knuckle 58 is connected to the eccentric 46 through connecting rod 48.
  • a first ram 60 is pivotally connected to the free end of link 54.
  • the first ram 60 is reciprocally disposed in guide 62 mounted on a cross member 18 between side members 14.
  • a second ram 64 is pivotally connected to the free end of link 56 and with guide post 69 reciprocally disposed in guide 65 mounted on a stationary vertical thrust member 66 mounted between side members 14.
  • a slot 67 is provided in one face of ram 64.
  • a horizontal thrust member 68 is pivotally connected between the free end of link 54 and pivotal mount 70 on end member 16 of frame 10.
  • Another horizontal thrust member 72 is pivotally connected between the free end of link 56 and pivotal mount 74 on end member 16 of frame 10.
  • the tooling station 76 is mounted on base 12 of the frame 10.
  • Lower tooling 78 is mounted in the tooling station 76.
  • Upper tooling 80 is mounted on the first ram 60 and is engageable with the lower tooling 78 in the tooling station 76.
  • a compression spring 82 is mounted on another cross member between side members 14. Spring 82 biases horizontal thrust member 72.
  • the toggle linkage 34 is urged away from base 12, and toggle linkage 34 maintains ram 60 a spaced distance from the tooling station 76 to provide clearance between the lower tooling 78 and upper tooling 80.
  • An adjustable thrust absorbing element 84 is mounted on the underside of the cross member 20 and engages horizontal thrust member 68 to limit the upward movement of the linkage 34 away from the base 12.
  • the thrust plate drive assembly 36 comprises thrust plate drive input gear 90 mounted on input shaft 92 connected to right angle drive 94.
  • the output shaft of the right angle drive 94 has an output gear 98 mounted thereon.
  • Output gear 98 drives idler gear 100 and in turn drives gear 102 mounted on shaft 104.
  • the rotatable thrust member 106 is mounted on shaft 104 for rotatable engagement between the second ram 64 and the stationary thrust member 66.
  • a block 107 is provided on the underside member 106 with dog 109 for engaging slot 67 in ram 64.
  • a compression spring 108 is connected between the rotatable thrust member 106 and the rotatable thrust member release plate 110 also mounted on shaft 104.
  • a guide member 112 with guide slot 114 for receiving guide pin 116 mounted on thrust member 106 is mounted on the plate 110.
  • Rotatable thrust member release cam 118 is mounted on plate 110.
  • a cam surface 120 on the underside of release cam 118 is provided for disengaging the rotatable thrust member dog 122.
  • the dog 122 is spring mounted in block 124 and engages the rotatable thrust member when it is rotated to a position between the second ram 64 and the stationary thrust member 66.
  • Compression spring 108 permits continuous rotation of the drive shaft 104 while the rotatable thrust member is engaged between ram 64 and thrust member 66 during the press stroke of ram 60.
  • the dog After completion of the press stroke, the dog is disengaged by cam surface 120 which engages cam follower 126 connected to the dog 122 and depresses the dog against spring 128 until the rotatable thrust member is released.
  • the dog 122 is returned to its normal position for stopping the rotatable thrust member 106 on its next revolution for engagement be tween the second ram 64 and the stationary verticle thrust member 66.
  • the toggle linkage 34 is extended five times with the second ram being driven a distance X to engage the stationary thrust member 66.
  • the first ram 60 is idled a spaced distance X away from the tooling station.
  • the thrust element 84 on the underside of cross member 20 and the stationary thrust member 66 are spaced, respectively, a distance X from the horizontal thrust member 68 and the second ram 64. This permits the first ram and the tooling mounted thereon to idle a distance X from engagement with the lower tooling 78 at the tooling station 76 during the first five extensions of the toggle linkage 34.
  • the reciprocal thrust member'l06 On the sixth revolution of the eccentric 46, the reciprocal thrust member'l06, having a thickness X, is rotated between the stationary thrust member 66 and ram 64 and engaged by the spring loaded dog 122. As the eccentric is rotated through its sixth revolution, the rotatable thrust member 106 is rotated between the first thrust member 66 and the second ram 64. Member 106 is stopped by dog 122. Extension of toggle linkage 34 causes the second ram 64 to engage member 106 and fixes the free end of toggle link 56. The toggle linkage causes the first ram to be moved toward the tooling station a distance X and engage the upper tooling 80 with the lower tooling 78 at the tooling station 76.
  • Pin 116 on reciprocal thrust member 106 disposed in slot 114 on guide member 112 and the compression spring 108 permits the continuous rotation of the drive 38 during the interval that the reciprocal thrust member 106 is engaged between stationary thrust member 66 and the second ram 64.
  • the cam surface 120 on thrust member release cam 118 mounted on plate is then rotated into engagement with cam follower 126 and the dog 112 is depressed in mount 124 against spring 128 until the reciprocal thrust member 106 is released when the toggle linkage 34 is retracted.
  • Compression spring 108 advances the reciprocal thrust member 106 until guide pin 116 engages the end of slot 114 on guide member 112 in the direction of rotation of the plate 110.
  • the ram 60 is again allowed to idle during the next five revolutions of the eccentric 46 providing an ample time interval and sufficient clearance between the lower tooling 78 and the upper tooling 80 to provide for other work functions at the tooling station 76, e.g., the advance of the workpiece and the feeding of another workpiece to the tooling station.
  • FIG. 4 illustrates a machine embodying the press of the present invention.
  • the same numerals are used in this figure to identify the same element as in the other figures.
  • the press of the present invention is particularly useful in conjunction with machine tools when a precisely controlled and timed press stroke is required.
  • the timing and displacement of the press stroke is mechanically inter-related to the main drive and may be interrelated to all other machine functions by drive means off the main drive assembly. For example, it may be desirable to provide a number of machine functions within each revolution of the main drive motor. For example, feeding a first workpiece in a first direction to the tooling station, feeding a second workpiece in a second direction to the tooling station, feeding a third workpiece in a third direction to the tooling station, and feeding a fourth workpiece in a fourth direction to the tooling station.
  • the press assembly of the present invention readily provides for such a sequence of work functions, wherein a number of work functions is performed at the work station previous to the press function and only a single work function is required after completion of the press stroke, or where the number of work functions is the same before and after the press stroke.
  • the press stroke can be accurately and repeatably provided at a given interval in each revolution of the main drive by selecting the desired gear ratio and setting up the main drive to drive any ancilliary work functions in sequence with the eccentric 46 connected to the toggle linkage 34 and the reciprocal thrust member drive 36.
  • a press comprising,
  • a frame including a base for receiving a workpiece
  • a first ram connected to a first link of said toggle linkage for reciprocally engaging a workpiece positioned in said base
  • first thrust absorbing means fixedly mounted on said frame away from said base
  • second thrust absorbing means for engaging between said second ram and said first thrust absorbing means, said second thrust absorbing means having a thickness substantially equal to the spaced distance between said first ram and said base, so that engagement of said second thrust absorbing means between said first thrust absorbing means and said second ram causes said first ram to reciprocally engage the workpiece positioned on said base when said toggle linkage is extended.
  • a press as recited in claim 1, additionally comprisi g;
  • a press as recited in claim 2, additionally comprising a spring 'mounted dog mounted. on said framefor engaging said rotatable thrust member, when said member is rotated into engagement between said first thrust absorbing means and said second ram.
  • a press as recited in claim 4, additionally comprising means for releasing said dog and said rotatable thrust absorbing member from engagement between said first thrust absorbing means and said second ram.
  • a frame including a base having a tooling station mounted thereon for receiving a workpiece
  • a first ram connected to a first link of said toggle linkage for reciprocally engaging tooling mounted thereon with a workpiece positioned at said tooling station
  • first thrust absorbing means fixedly mounted on said frame above said toggle linkage
  • second thrust absorbing means for engaging between said second ram and said first thrust absorbing means, said second thrust absorbing means having a thickness substantially equal to the spaced distance between said tooling mounted in the first ram and the tooling station, so that engagement of said second thrust absorbing means between said first thrust absorbing means and said second ram causes said first ram to reciprocally engage the tooling mounted thereon with the workpiece positioned at said tooling station,
  • first drive means mounted in said frame for extending said toggle linkage
  • third drive means operably connected to said first and second drive means for controlling the extension of said toggle linkage and the engagement of said second thrust absorbing means between said first thrust absorbing means and said second ram so that the tooling mounted on the first ram engages the workpiece at the tooling station at a selected interval of a cycle of said third drive means.
  • a press as recited in claim 6, additionally comprising a pair of horizontal support members, each member pivotally connected between each toggle link of said toggle linkage and said frame.
  • said means for urging said toggle linkage away from said base comprises a spring mounted on a cross-member mounted on said frame, said spring mounted between said crossmember and one of said horizontal support members.
  • a press as recited in claim 6, wherein said second drive means is a right angle drive, said second thrust absorbing means is a member rotatable parallel to said base, and said rotatable member is driven at a ratio of 1:1 by said third drive means.
  • a press as recited in claim 9, wherein said first drive means is an eccentric, and said eccentric is driven at a ratio of greaterthan 1:! by said third drive means.

Abstract

A programmable press is provided comprising a frame including a base, a toggle linkage mounted in the frame, a first reciprocal ram connected to the first toggle link, a second reciprocal ram connected to a second toggle link, a first thrust absorbing member, and a second thrust absorbing member for engagement between the second reciprocal ram and the first thrust absorbing member. The toggle linkage is urged away from the base, and when the toggle linkage is extended, the second ram is driven against the second thrust absorbing member, and the first ram idles a distance above the base. When the second thrust member is engaged between the first thrust absorbing member and the second ram, extension of the toggle linkage reciprocates the first ram to engage a workpiece positioned on the base.

Description

United States Patent 1 1 1111 3,919,876
Bakermans [45] Nov. 18, 1975 1 TOGGLE PRESS 3,661,008 5/1972 Richardson 72/451 [75] Inventor: Fransiscus Cornelius Bakermans, 3,795,168 3/1974 Spachner 74/38 Shiremanstown, Pa.
[73] Assignee: E. I. Du Pont de Nemours & C0.,
Wilmington, Del.
[22] Filed: Nov. 11, 1974 [21] Appl. No.: 522,882
[52] US. Cl. 72/451; 72/431; 74/38; 83/630; 100/282 [51] Int. Cl. B21J 9/18 [58] Field of Search 72/451, 431, 441; 100/281, 100/282; 74/38, 40; 83/630 [56] References Cited UNITED STATES PATENTS 2,339,456 l/l944 Budlong 83/630 2,412,924 12/1946 Stover 1 100/281 2,551,825 5/1951 Cook 1 1 74/40 2,718,018 9/1955 Hildmann 100/282 2,851,888 9/1958 Scholin 74/38 2,986,947 6/1961 Slettengren 74/38 3,174,347 3/1965 Hecht 74/38 3,270,665 9/1966 Shiokawa 100/282 Primary Examiner-C. W. Lanham Assistant Examiner-Gene P. Crosby ABSTRACT A programmable press is provided comprising a frame including a base, a toggle linkage mounted in the frame, a first reciprocal ram connected to the first toggle link, a second reciprocal ram connected to a second toggle link, a first thrust absorbing member, and a second thrust absorbing member for engagement between the second reciprocal ram and the first thrust absorbing member. The toggle linkage is urged away from the base, and when the toggle linkage is extended, the second ram is driven against the second thrust absorbing member, and the first ram idles a distance above the base. When the second thrust member is engaged between the first thrust absorbing 10 Claims, 4 Drawing Figures US. Patent Nov. 18,1975 Sheet10f3 3,919,876
US. Patent Nov. 18, 1975 Sheet 3 of3 3,919,876
TOGGLE PRESS BACKGROUND OF THE INVENTION 1. Field of the Invention This invention relates to toggle-driven presses, and particularly relates to a press in which a tool-carrying ram is reciprocated and engaged with a tooling station to perform a work function on one or more workpieces positioned at the tooling station.
2. Description of the Prior Art Toggle-driven presses including a ram connected to a free end of one toggle link are described in U.S. Pat. No. 2,986,947, and U.S. Pat. No. 3,174,347, U.S. Pat. No. 3,270,665 and U.S. Pat. No. 3,795,168. The above-mentioned patents describe toggle-driven presses including a toggle link adjustably connected to a frame for controlling the stroke or force of the ram. A punch press including a toggle-linkage actuatable by a pair of horizontal arms connected at one end to one of the toggle links is described in U.S. Pat. No. 2,851,888. Each arm has a slot engaging the pin of the crank and is free to idle until a trigger operated lever system is manually operated to move a latch member into engagement with the horizontal arms and actuate the toggle links. Another toggle press including a first and second linkage of opposed angularity is described in U.S. Pat. No. 3,661,008. The second toggle linkage is connected to a stationary point and is shorter than the other link of the second toggle linkage so that the press slide spends a greater part of its operating cycle near the top of its stroke removed from the thrust member, than it does near the bottom of the stroke close to the thrust member. This provides for a feed mechanism to operate over a longer interval during each cycle of the press.
The press of the present invention, in addition to providing increased time and clearance for performing feed and other functions at the tooling station under a reciprocal ram, provides for programming the engagement of tooling mounted on the ram at the tooling station at a selected interval during a machine cycle.
SUMMARY OF THE INVENTION According to the present invention, a press is provided comprising,
a frame including a base for receiving a workpiece,
a toggle linkage operably mounted in the frame,
a first ram connected to a first link of the toggle linkage for reciprocally engaging a workpiece positioned on the base,
first thrust absorbing means fixedly mounted to the frame away from the base,
a second ram connected to a second link of the toggle linkage for reciprocally engaging the first thrust absorbing means,
means for urging the toggle linkage away from the base so that extension of the toggle linkage reciprocally engages the second ram with the first thrust absorbing means while the first ram idles a spaced distance above the base, and,
second thrust absorbing means for engaging between the second ram and the first thrust absorbing means, the second thrust absorbing means having a thickness substantially equal to the spaced distance between the first ram and said base, so that engagement of the second thrust absorbing member between the second thrust absorbing member and the second ram causes the first ram to reciprocally engage the workpiece positioned on the base when the toggle linkage is extended. First and second drive means are provided for, respectively, extending the toggle linkage and for engaging the second thrust absorbing means, and third drive means is provided connected to the first and second drive means for controlling the extension of the toggle linkage and the engagement of the second thrust absorbing means; so that the first ram is reciprocated to engage the workpiece at a selected interval ofa cycle of the third drive means Preferably, the second thrust absorbing means is a member rotated parallel to the base through the second drive means. A spring mounted dog is provided for engaging the second thrust absorbing member between the second ram and the first thrust absorbing means. The second thrust absorbing means is spring loaded to the second drive means to permit lost motion of the thrust absorbing member and continuous rotation of the drive means, when the second thrust member is engaged between the second ram and the first thrust absorbing means. A release cam is mounted on the second drive means to disengage the dog and release the second thrust member from between the second ram and the first thrust absorbing means on completion of the press stroke of the first ram.
The press assembly of the present invention provides for operation at higher speeds with increased time and clearance of the reciprocal ram for performing feed and other work functions at the tooling station, thus enabling work feed and other functions to be performed over a greater interval of the press cycle time. Additionally, the rotatable thrust member may be programmed to engage the first ram with the tooling station during any prescribed interval over the press cycle. This feature provides for driving other machine functions, e.g., workpiece feed, in sequence with the main press drive.
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a diagramatic view in perspective of an apparatus embodying the invention.
FIG. 2 is a partially broken-away elevation view of the apparatus of FIG. 1.
FIG. 3 is a partially broken-away plan view of the apparatus of FIG. 1.
FIG. 4 is a partially broken-away elevation view of another apparatus embodying the invention.
DETAILED DESCRIPTION OF THE INVENTION The apparatus of the invention comprises a frame 10 having a base 12 with side members 14, and end member 16. Cross members 18 and 20 and mounting plate 24 are provided between spaced upstanding side members 14 (one shown).
The main drive assembly 30 is mounted in frame 10. Drive assembly 30 is connected to eccentric drive 32 which extends the press toggle drive linkage 34. Drive assembly 30 is also connected to the thrust plate drive 36 and rotates thrust plate assembly 38 parallel to the base 12.
The drive assembly 30 includes a motor 40 mounted on base 12. Belt 41 on pulleys 43 and 45 drives main drive input shaft 42 journaled in bearings 44 in side members 14. An eccentric 46 is mounted on input shaft 42. A rod 48 is connected between eccentric 46 and toggle linkage 34. Drive gear 50 on input shaft 42 drives the thrust plate drive assembly 36.
The toggle linkage 34 comprises a first toggle link 54 and a second toggle link 56 connected together at a knuckle 58. The knuckle 58 is connected to the eccentric 46 through connecting rod 48. A first ram 60 is pivotally connected to the free end of link 54. The first ram 60 is reciprocally disposed in guide 62 mounted on a cross member 18 between side members 14. A second ram 64 is pivotally connected to the free end of link 56 and with guide post 69 reciprocally disposed in guide 65 mounted on a stationary vertical thrust member 66 mounted between side members 14. A slot 67 is provided in one face of ram 64. A horizontal thrust member 68 is pivotally connected between the free end of link 54 and pivotal mount 70 on end member 16 of frame 10. Another horizontal thrust member 72 is pivotally connected between the free end of link 56 and pivotal mount 74 on end member 16 of frame 10.
The tooling station 76 is mounted on base 12 of the frame 10. Lower tooling 78 is mounted in the tooling station 76. Upper tooling 80 is mounted on the first ram 60 and is engageable with the lower tooling 78 in the tooling station 76. A compression spring 82 is mounted on another cross member between side members 14. Spring 82 biases horizontal thrust member 72. The toggle linkage 34 is urged away from base 12, and toggle linkage 34 maintains ram 60 a spaced distance from the tooling station 76 to provide clearance between the lower tooling 78 and upper tooling 80. An adjustable thrust absorbing element 84 is mounted on the underside of the cross member 20 and engages horizontal thrust member 68 to limit the upward movement of the linkage 34 away from the base 12.
The thrust plate drive assembly 36 comprises thrust plate drive input gear 90 mounted on input shaft 92 connected to right angle drive 94. The output shaft of the right angle drive 94 has an output gear 98 mounted thereon. Output gear 98 drives idler gear 100 and in turn drives gear 102 mounted on shaft 104. The rotatable thrust member 106 is mounted on shaft 104 for rotatable engagement between the second ram 64 and the stationary thrust member 66. A block 107 is provided on the underside member 106 with dog 109 for engaging slot 67 in ram 64. A compression spring 108 is connected between the rotatable thrust member 106 and the rotatable thrust member release plate 110 also mounted on shaft 104. A guide member 112 with guide slot 114 for receiving guide pin 116 mounted on thrust member 106 is mounted on the plate 110. Rotatable thrust member release cam 118 is mounted on plate 110. A cam surface 120 on the underside of release cam 118 is provided for disengaging the rotatable thrust member dog 122. The dog 122 is spring mounted in block 124 and engages the rotatable thrust member when it is rotated to a position between the second ram 64 and the stationary thrust member 66. Compression spring 108 permits continuous rotation of the drive shaft 104 while the rotatable thrust member is engaged between ram 64 and thrust member 66 during the press stroke of ram 60. After completion of the press stroke, the dog is disengaged by cam surface 120 which engages cam follower 126 connected to the dog 122 and depresses the dog against spring 128 until the rotatable thrust member is released. The dog 122 is returned to its normal position for stopping the rotatable thrust member 106 on its next revolution for engagement be tween the second ram 64 and the stationary verticle thrust member 66.
The operation and advantages of the press assembly of the present invention may be readily understood with particular reference to the drawings and the description which follows.
With the rotatable thrust member 106 rotated out of the engaged position between thrust member 66 and ram 64, shaft 42 rotates the eccentric and the toggle linkage 34 is extended. The compression spring 82 mounted between crossmember 20 and horizontal thrust member 72 biases the toggle linkage 34 away from the tooling station 76. The second reciprocal ram 64 is driven upward a distance X and the first reciprocal ram 60 is maintained a distance X away from the tooling station 76 by thrust element 84 engaging horizontal thrust element 68. Assuming the reciprocal thrust member 106 is geared to rotate one revolution for one revolution of motor 40 and eccentric 46 is geared to rotate six revolutions for every revolution of motor 40, the toggle linkage 34 is extended five times with the second ram being driven a distance X to engage the stationary thrust member 66. The first ram 60 is idled a spaced distance X away from the tooling station. The thrust element 84 on the underside of cross member 20 and the stationary thrust member 66 are spaced, respectively, a distance X from the horizontal thrust member 68 and the second ram 64. This permits the first ram and the tooling mounted thereon to idle a distance X from engagement with the lower tooling 78 at the tooling station 76 during the first five extensions of the toggle linkage 34. On the sixth revolution of the eccentric 46, the reciprocal thrust member'l06, having a thickness X, is rotated between the stationary thrust member 66 and ram 64 and engaged by the spring loaded dog 122. As the eccentric is rotated through its sixth revolution, the rotatable thrust member 106 is rotated between the first thrust member 66 and the second ram 64. Member 106 is stopped by dog 122. Extension of toggle linkage 34 causes the second ram 64 to engage member 106 and fixes the free end of toggle link 56. The toggle linkage causes the first ram to be moved toward the tooling station a distance X and engage the upper tooling 80 with the lower tooling 78 at the tooling station 76. Pin 116 on reciprocal thrust member 106 disposed in slot 114 on guide member 112 and the compression spring 108 permits the continuous rotation of the drive 38 during the interval that the reciprocal thrust member 106 is engaged between stationary thrust member 66 and the second ram 64. The cam surface 120 on thrust member release cam 118 mounted on plate is then rotated into engagement with cam follower 126 and the dog 112 is depressed in mount 124 against spring 128 until the reciprocal thrust member 106 is released when the toggle linkage 34 is retracted. Compression spring 108 advances the reciprocal thrust member 106 until guide pin 116 engages the end of slot 114 on guide member 112 in the direction of rotation of the plate 110. The ram 60 is again allowed to idle during the next five revolutions of the eccentric 46 providing an ample time interval and sufficient clearance between the lower tooling 78 and the upper tooling 80 to provide for other work functions at the tooling station 76, e.g., the advance of the workpiece and the feeding of another workpiece to the tooling station.
FIG. 4 illustrates a machine embodying the press of the present invention. The same numerals are used in this figure to identify the same element as in the other figures.
The press of the present invention is particularly useful in conjunction with machine tools when a precisely controlled and timed press stroke is required. The timing and displacement of the press stroke is mechanically inter-related to the main drive and may be interrelated to all other machine functions by drive means off the main drive assembly. For example, it may be desirable to provide a number of machine functions within each revolution of the main drive motor. For example, feeding a first workpiece in a first direction to the tooling station, feeding a second workpiece in a second direction to the tooling station, feeding a third workpiece in a third direction to the tooling station, and feeding a fourth workpiece in a fourth direction to the tooling station. Then performing a work function on the workpieces using a press stroke and then removing the workpiece upon which the work function has been performed from the tooling station. The press assembly of the present invention readily provides for such a sequence of work functions, wherein a number of work functions is performed at the work station previous to the press function and only a single work function is required after completion of the press stroke, or where the number of work functions is the same before and after the press stroke. Additionally, the press stroke can be accurately and repeatably provided at a given interval in each revolution of the main drive by selecting the desired gear ratio and setting up the main drive to drive any ancilliary work functions in sequence with the eccentric 46 connected to the toggle linkage 34 and the reciprocal thrust member drive 36.
While a preferred embodiment of the press assembly of the present invention is desribed above, it being apparent that other embodiments and modifications will be obvious to one of ordinary skill in the art; the invention is not to be limited except by the appended claims.
What is claimed is:
l. A press comprising,
a frame including a base for receiving a workpiece,
a toggle linkage operably mounted in said frame,
a first ram connected to a first link of said toggle linkage for reciprocally engaging a workpiece positioned in said base,
first thrust absorbing means fixedly mounted on said frame away from said base,
a second ram connected to a second link of said toggle linkage for reciprocally engaging said first thrust absorbing means,
second thrust absorbing means for engaging between said second ram and said first thrust absorbing means, said second thrust absorbing means having a thickness substantially equal to the spaced distance between said first ram and said base, so that engagement of said second thrust absorbing means between said first thrust absorbing means and said second ram causes said first ram to reciprocally engage the workpiece positioned on said base when said toggle linkage is extended.
2. A press, as recited in claim 1, wherein said second thrust absorbing means is a member rotatable parallel to said base.
3. A press, as recited in claim 1, additionally comprisi g;
means for urging said toggle linkage away from said base so that extension of said toggle linkage reciprocally engages said second ram with said first thrust absorbing means while said first ram idles a spaced distance above said base.
4. A press, as recited in claim 2, additionally comprisinga spring 'mounted dog mounted. on said framefor engaging said rotatable thrust member, when said member is rotated into engagement between said first thrust absorbing means and said second ram.
5. A press, as recited in claim 4, additionally comprising means for releasing said dog and said rotatable thrust absorbing member from engagement between said first thrust absorbing means and said second ram.
6. A press comprising,
a frame including a base having a tooling station mounted thereon for receiving a workpiece,
a toggle linkage operably mounted in said frame,
a first ram connected to a first link of said toggle linkage for reciprocally engaging tooling mounted thereon with a workpiece positioned at said tooling station,
first thrust absorbing means fixedly mounted on said frame above said toggle linkage,
a second ram connected to a second link of said toggle linkage for reciprocally engaging said first thrust absorbing means,
means for urging said toggle linkage away from said base so that extension of said toggle linkage reciprocally engages said second ram with said first thrust absorbing means while said tooling mounted on said first ram idles a spaced distance above said tooling station,
second thrust absorbing means for engaging between said second ram and said first thrust absorbing means, said second thrust absorbing means having a thickness substantially equal to the spaced distance between said tooling mounted in the first ram and the tooling station, so that engagement of said second thrust absorbing means between said first thrust absorbing means and said second ram causes said first ram to reciprocally engage the tooling mounted thereon with the workpiece positioned at said tooling station,
first drive means mounted in said frame for extending said toggle linkage,
second drive means mounted on said frame for continuously rotating said second thrust absorbing means, and
third drive means operably connected to said first and second drive means for controlling the extension of said toggle linkage and the engagement of said second thrust absorbing means between said first thrust absorbing means and said second ram so that the tooling mounted on the first ram engages the workpiece at the tooling station at a selected interval of a cycle of said third drive means.
7. A press, as recited in claim 6, additionally comprising a pair of horizontal support members, each member pivotally connected between each toggle link of said toggle linkage and said frame.
8. A press, as recited in claim 7, wherein said means for urging said toggle linkage away from said base comprises a spring mounted on a cross-member mounted on said frame, said spring mounted between said crossmember and one of said horizontal support members.
9. A press, as recited in claim 6, wherein said second drive means is a right angle drive, said second thrust absorbing means is a member rotatable parallel to said base, and said rotatable member is driven at a ratio of 1:1 by said third drive means.
10. A press, as recited in claim 9, wherein said first drive means is an eccentric, and said eccentric is driven at a ratio of greaterthan 1:! by said third drive means.

Claims (10)

1. A press comprising, a frame including a base for receiving a workpiece, a toggle linkage operably mounted in said frame, a first ram connected to a first link of said toggle linkage for reciprocally engaging a workpiece positioned in said base, first thrust absorbing means fixedly mounted on said frame away from said base, a second ram connected to a second link of said toggle linkage for reciprocally engaging said first thrust absorbing means, second thrust absorbing means for engaging between said second ram and said first thrust absorbing means, said second thrust absorbing means having a thickness substantially equal to the spaced distance between said first ram and said base, so that engagement of said second thrust absorbing means between said first thrust absorbing means and said second ram causes said first ram to reciprocally engage the workpiece positioned on said base when said toggle linkage is extended.
2. A press, as recited in claim 1, wherein said second thrust absorbing means is a member rotatable parallel to said base.
3. A press, as recited in claim 1, additionally comprising; means for urging said toggle linkage away from said base so that extension of said toggle linkage reciprocally engages said second ram with said first thrust absorbing means while said first ram idles a spaced distance above said base.
4. A press, as recited in claim 2, additionally comprising a spring mounted dog mounted on said frame for engaging said rotatable thrust member, when said member is rotated into engagement between said first thrust absorbing means and said second ram.
5. A press, as recited in claim 4, additionally comprising means for releasing said dog and said rotatable thrust absorbing member from engagement between said first thrust absorbing means and said second ram.
6. A press comprising, a frame including a base having a tooling station mounted thereon for receiving a workpiece, a toggle linkage operably mounted in said frame, a first ram connected to a first link of said toggle linkage for reciprocally engaging tooling mounted thereon with a workpiece positioned at said tooling station, first thrust absorbing means fixedly mounted on said frame above said toggle linkage, a second ram connected to a second link of said toggle linkage for reciprocally engaging said first thrust absorbing means, means for urging said toggle linkage away from said base so that extension of said toggle linkage reciprocally engages said second ram with said first thrust absorbing means while said tooling mounted on said first ram idles a spaced distance above said tooling station, second thrust absorbing means for engaging between said second ram and said first thrust absorbing means, said second thrust absorbing means having a thickness substantially equal to the spaced distance between said tooling mounted in the first ram and the tooling station, so that engagement of said second thrust absorbing means betwEen said first thrust absorbing means and said second ram causes said first ram to reciprocally engage the tooling mounted thereon with the workpiece positioned at said tooling station, first drive means mounted in said frame for extending said toggle linkage, second drive means mounted on said frame for continuously rotating said second thrust absorbing means, and third drive means operably connected to said first and second drive means for controlling the extension of said toggle linkage and the engagement of said second thrust absorbing means between said first thrust absorbing means and said second ram so that the tooling mounted on the first ram engages the workpiece at the tooling station at a selected interval of a cycle of said third drive means.
7. A press, as recited in claim 6, additionally comprising a pair of horizontal support members, each member pivotally connected between each toggle link of said toggle linkage and said frame.
8. A press, as recited in claim 7, wherein said means for urging said toggle linkage away from said base comprises a spring mounted on a cross-member mounted on said frame, said spring mounted between said cross-member and one of said horizontal support members.
9. A press, as recited in claim 6, wherein said second drive means is a right angle drive, said second thrust absorbing means is a member rotatable parallel to said base, and said rotatable member is driven at a ratio of 1:1 by said third drive means.
10. A press, as recited in claim 9, wherein said first drive means is an eccentric, and said eccentric is driven at a ratio of greater than 1:1 by said third drive means.
US522882A 1974-11-11 1974-11-11 Toggle press Expired - Lifetime US3919876A (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4261782A (en) * 1980-02-08 1981-04-14 Riegel Textile Corporation Apparatus for attaching elastic strips during the manufacture of elastic leg disposable diapers
US4959989A (en) * 1988-06-09 1990-10-02 Reo Hydraulic Pierce & Form Force multiplying press
US5823087A (en) * 1995-09-27 1998-10-20 Bruderer Ag Punch press having a toggle joint mechanism drive
US6012321A (en) * 1995-04-12 2000-01-11 Murata Kikai Kabushiki Kaisha Driving device for a pressing machine
US20130152660A1 (en) * 2010-06-07 2013-06-20 Kiefel Gmbh Thermoforming station, thermoforming system, method for forming or stamping articles produced
CN111496165A (en) * 2020-05-05 2020-08-07 李素莲 Forging equipment for building materials

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2339456A (en) * 1942-06-19 1944-01-18 Littell Machine Co F J Cutting apparatus
US2412924A (en) * 1940-08-02 1946-12-17 Anchor Hocking Glass Corp Apparatus for sealing containers
US2551825A (en) * 1948-09-28 1951-05-08 Jay W Cook Mechanical control mechanism
US2718018A (en) * 1953-08-10 1955-09-20 Brock And Rankin Inc Machine for pressing and building-in books
US2851888A (en) * 1953-09-22 1958-09-16 Scholin Axel Portable punch press
US2986947A (en) * 1955-04-18 1961-06-06 Svelsmekano Ab Control movement for cutting tool in metal plate cutting machine
US3174347A (en) * 1961-04-20 1965-03-23 May Pressenbau Ltd Toggle lever system
US3270665A (en) * 1963-07-15 1966-09-06 Shiokawa Shozo Machine press
US3661008A (en) * 1970-03-17 1972-05-09 Wickman Mach Tool Sales Ltd Presses
US3795168A (en) * 1973-01-04 1974-03-05 Gulf & Western Ind Prod Co Low-impact four-bar press

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2412924A (en) * 1940-08-02 1946-12-17 Anchor Hocking Glass Corp Apparatus for sealing containers
US2339456A (en) * 1942-06-19 1944-01-18 Littell Machine Co F J Cutting apparatus
US2551825A (en) * 1948-09-28 1951-05-08 Jay W Cook Mechanical control mechanism
US2718018A (en) * 1953-08-10 1955-09-20 Brock And Rankin Inc Machine for pressing and building-in books
US2851888A (en) * 1953-09-22 1958-09-16 Scholin Axel Portable punch press
US2986947A (en) * 1955-04-18 1961-06-06 Svelsmekano Ab Control movement for cutting tool in metal plate cutting machine
US3174347A (en) * 1961-04-20 1965-03-23 May Pressenbau Ltd Toggle lever system
US3270665A (en) * 1963-07-15 1966-09-06 Shiokawa Shozo Machine press
US3661008A (en) * 1970-03-17 1972-05-09 Wickman Mach Tool Sales Ltd Presses
US3795168A (en) * 1973-01-04 1974-03-05 Gulf & Western Ind Prod Co Low-impact four-bar press

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4261782A (en) * 1980-02-08 1981-04-14 Riegel Textile Corporation Apparatus for attaching elastic strips during the manufacture of elastic leg disposable diapers
US4959989A (en) * 1988-06-09 1990-10-02 Reo Hydraulic Pierce & Form Force multiplying press
US6012321A (en) * 1995-04-12 2000-01-11 Murata Kikai Kabushiki Kaisha Driving device for a pressing machine
US5823087A (en) * 1995-09-27 1998-10-20 Bruderer Ag Punch press having a toggle joint mechanism drive
US20130152660A1 (en) * 2010-06-07 2013-06-20 Kiefel Gmbh Thermoforming station, thermoforming system, method for forming or stamping articles produced
CN111496165A (en) * 2020-05-05 2020-08-07 李素莲 Forging equipment for building materials

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