CA1098380A - Tandem roll groover - Google Patents
Tandem roll grooverInfo
- Publication number
- CA1098380A CA1098380A CA320,264A CA320264A CA1098380A CA 1098380 A CA1098380 A CA 1098380A CA 320264 A CA320264 A CA 320264A CA 1098380 A CA1098380 A CA 1098380A
- Authority
- CA
- Canada
- Prior art keywords
- grooving
- roll
- rolls
- backup
- backup roll
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 239000007787 solid Substances 0.000 claims abstract description 3
- 239000003638 chemical reducing agent Substances 0.000 claims description 5
- 230000000694 effects Effects 0.000 claims 1
- 239000012530 fluid Substances 0.000 abstract description 3
- 230000002093 peripheral effect Effects 0.000 description 4
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000002441 reversible effect Effects 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- CEJLBZWIKQJOAT-UHFFFAOYSA-N dichloroisocyanuric acid Chemical compound ClN1C(=O)NC(=O)N(Cl)C1=O CEJLBZWIKQJOAT-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D17/00—Forming single grooves in sheet metal or tubular or hollow articles
- B21D17/04—Forming single grooves in sheet metal or tubular or hollow articles by rolling
Abstract
TANDEM ROLL GROOVER
Abstract or The Disclosure A single electric motor is employed to drive two, separate backup roll supporting shafts which are mounted to rotate about a common horizontal axis. A first, solid, cylindrical backup roll of relatively small diameter (less than 11/2") is secured to one end of one of said shafts for rotation beneath a first grooving roll, and a second, relatively larger diameter backup roll (greater than 11/2" and less than 2"), which is annular in configuration is secured coaxially to one end of the other shaft for rotation thereby beneath a second grooving roll. Each grooving roll 19 mounted for vertical reciprocation by springs and by a hydraulic ram supplied by fluid from a separate hand pump. Means is also provided for adjustably limiting the descent of each backup roll.
Abstract or The Disclosure A single electric motor is employed to drive two, separate backup roll supporting shafts which are mounted to rotate about a common horizontal axis. A first, solid, cylindrical backup roll of relatively small diameter (less than 11/2") is secured to one end of one of said shafts for rotation beneath a first grooving roll, and a second, relatively larger diameter backup roll (greater than 11/2" and less than 2"), which is annular in configuration is secured coaxially to one end of the other shaft for rotation thereby beneath a second grooving roll. Each grooving roll 19 mounted for vertical reciprocation by springs and by a hydraulic ram supplied by fluid from a separate hand pump. Means is also provided for adjustably limiting the descent of each backup roll.
Description
Q"83~
This ~nvention relates to roll groovers for thin walled pipe, and more particularly to a tandem roll groover machine which is capable of grooving both relatively large and small diameter pipe.
Known devices for grooving thin walled pipe comprise, typically, a grooved backup roll over which is inserted one end of a sectlon of thin walled pipe which is to be grooved.
The backup roll is positioned beneath a vertically movable grooving rollg which has on its outer peripheral surface a circumferential boss, or pro~ection, which registers with the groove in the backup roll. In use, the backup roller is rotated, and the rotatable grooving roll is ~orced vertically downwardly lnto engagement with the thin walled pipe, which then begins to rotate as the result of frictional contact between the pipe and the grooved backup roll. As the grooving roll de~cends it deforms the thin walled pipe downwardly into the registering groove in the backup roll, thus rorming an annular groove in the pipe ad~acent said one end thereof.
As pointed out in my copending Canadian application Serial No. 292,127, which ~as flled December 1, 1977, and which is entitled Backup Roll For Thin Walled Pipe Grooving Device, di~ficulty has been encountered heretofore when grooving thin walled pipes of rather small diameters, for example pipes having -diameters of 12 inch or less To solve this problem, my above-noted applica~ion disclosed ~! novel, solid backup roll attachment, which is adapted to be employed ln place of the - u~ual, annular-type o~ backup roll. While this novel backup roll has the advantage that it enables an operator to use the same grooving device or machine on both relatively small and large d1ameter pipes, it nevertheless requires some modification of the existing, or conventional grooving machlne; and it also necessitates shutting down a machine each time one type of backup roll is to be removed and replaced by the other.
lQQ83~0 Accordingly, it is an object of this invention to provide an improved roll grooving machine which utilizes a single driving mechanism for operating two separate sets of grooving rolls. Such a machine enables the grooving of both relatively ~mall and large diameter thin walled pipe without having to shut down the machine and make a substitution of one type of ~ckup roll for another While Canadian patent ~o. 560J459 d~scloses flange forming apparatus which utilizes a single shaft for supporting two exterior dies, the apparatus requires the use of separate, movable carriages for moving the cooperating exterior dies into and out of operative pos-itions relative to the interior dies, and it is not possible to drive the interior dies at different speeds.
A further obJect of this invention is to provide a tandem roll grooving device having two sets of groovi~g rolls wh~ch can be operated, optionally, either in unison or individually.
Other ob~ects of the invention will be apparent hereinafter from the specification and from the recital of the appended claims, particularly when read in conjunction with the accompany-ing drawings.
In the drawings:
Fig. 1 is a fragmentary, front elevational view of a tandem roll grooving machine made accordlng to one embodiment of this invention, portions of the machine being cut away and shown in section for purposes of illustration; and Fig. 2 is a fragmentary end elevational view of this machlne, as seen when looking towards the left of machirle as shown in Fig. 1.
Referring now to the dr~wings by numerals of reference, 10 denotes generally a tandem roll grooving machine oomprising a base plate 11, which is generally rectangular in con~iguration, and which is supported adjacent ~ts corners on the upper ends o~
1(3983B~
four, spaced, telescopically adJustable legs 13. The lower section 14 of each ~eg 13 is slidable at its upper end tele-scopically in the lower end of the upper, tubular leg section, and is adapted to be secured ad~ustably relative to its upper section by a pair of adJusting nuts 15 (Fig. 2) which thread into each upper section for engagement at their inner ends with the lower sections 14.
Secured to the underside of plate 11 ad~acent one end thereof is an electric motor 21, ~aving an output shaft which is drivingly connect~d to a speed reducer 22 that is also mounted beneath plate 11 adJacent one end of the motor 21. The output shaft 23 of the speed reducer pro~ects into one side of a drive housing 24, which is secured intermediate its ends in a centra~l opening in base pla~e ~. Secured to the shaft 23 ~or rotation thereby in the houslng 24 is the hub 26 of a double sprocket having thereon a pair Or axially-spaced sprocket wheels 27 and 28. In the embodiment lllustrated, the two wheels 27 and 28 are shown to ~e the same sizeJ and merely by way of example, each may have the~En twenty-one teeth.
Secured to the surface of the base plate 11 ad~acent opposite ends thereof are two pairs of ~paced pillow blocks 31 and 32, respectively, the bores of which are axially aligned.
Rotatably ~ournaled intermedlate its ends in the bores of the pillow blocks 31 is a first, backup roll support~ng shaft 33, one end of which (the left end is ~hown in Fig. 1) pro~ect~ into on~ side of the drive housing 24 where the latter pro~ects above the upper surface of plate 11. Rotatably ~ournaled intermediate 1ts ends in the ~ores of the other two pillow blocks 32 is a second backup roll supporting shaft 34, which al50 proJects at one end (its right end in Fig. 1) into the upper end of housing 24 in spaced, coaxial relation to the inner end of shaft 33. Secured to the inner end of shaft 33 in hous~ng 24 is a sprocket wheel 35, the teeth of which are connected lQ"83~
by a chain 36 to the teeth of wheel 27 on the speed reducer shaft 23. Similarly, a sprocket wheel 37, which i3 secured to the inner end of shaft 34 in housing 24, is drivingly connected by a further chain 38 to the sprocket wheel 28.
In the embodiment illustrated, the sprocket wheel ~5 is smaller than the wheel 37J and has thereon thir-ceen teeth, as compared ~or example to twenty-one teeth on the wheel 37.
As a consequenceJ when the wheels 35 and 37 are driven throu~h chains 36 and 38 by the wheels 27 and 28J the shaft 33 will be rotated at a slightly higher speed than that o~ the shaft 34.
These relative speeds and sprocket wheel sizes a~ disclosed hereln are glven merely by way of example.
Secured to the outer end of shart 33 coaxially thereof is a solidJ cylindrical backup roll 41J which may be similar in conrigurat1on to the backup roll dlsclosed in my above-noted copending Canadian patent application Serial No. 292,127.
Roll 41 has a threaded shank portlon 42J which ls threaded in-to an axlal bore formed ln the outer end of shaft 33 coaxlally thereof. An externalJ circumferentlal shoulder 43 1B formed on roll 41 lntermediate its ends ror engagement with the outer termlnal end of shaft 33 to llmit the extent to ~hich the roll can be threaded into ~hart 33. Forwardly, or to the risht of the shoulder 43 as shown ~n Fig. 1, roll 41 has ln its per-ipheral surface an annular groove 44, which is used to form a groove in thin walled pipe as noted hereinarter.
Secured on the base plate 11 ad~acent opposite sides Or sha~t 33, and outwardly Or the pillow blocks 31, are two, spaced, parallel, vertically disposed side plates 46. Secured to and extending transversely between the upper edges of plates 46, and overlying the backup roll 41, 1~ a horlzontally disposed coverplate 47. Secured at its lower ends on the plate 47 above and in re~istry wlth the groove 44 in the backup roll 41 is the ~ylindrical housing 48 of a hydraullc ram. Pro-~q83~
Jecting out of the lower end of housing 48 and through a registering opening in the cover plate 47 is a vertically roc-iproca~le ram or piston rod 49, the lower end of which engages an inverted, generally U-shaped yoke member 51. Member 51 is mounted betwcen plates 46 for vertical reciprocat~on above roll 41 in ~anner which will be apparent hereinafter. It carrres a rotatable grooving head or roll 52, opposite ends of which are rotatably ~ourn~led in the legs 53 of yoke 51 to pota~ce ~erebetween about an axis which extends parallel to, and ls in the same vertical plane as, the axis of the backup roll 41. The gr~ving head 52 ha~ thereon the usual circum-- ferential grooving boss or operating sur~ace 54, which registers with, and is complimentary to~ the groove 44 in the backup roll 41.
At the opposite end of base plate 11 an annular backup roll 61 is secured by a bolt 62 coaxially to the outer end of shaft 34, and has in its peripheral surface an annular groove 63, which is designed to groove thin walled pipe having a diameter lapger than the type of pipe whlch is designed to be grooved by the bakkup roll 41. Also at this end of the base plate, two, spaced, parallel side walls 66 pro~ect upwardly from the plate 11 and support on their upper ends a horlzontally disposed cover plate 67, which o~erlies the backup roll 61.
The housing 68 of a further ram i~ secured on plate 67 above and in registry with the backup roll 61, and has a reciprocable operating ram or rod 69 which proJects downwardly through a registering opening in plate 67.
The lower end of ram 69 engages the closed end o~ an inverted, generally U-shaped yoke member 71, which carr~es between its legs 72 a rotatable grooving head or roll 73. This roll is mounted on a shaft 74 which is rotatabl~y ~ournaled at opposite ends on the legs 72 of the yoke member 71, and has on its outer peripheral surface a c~rcumferential boss or operating surface 75, which registers with the groove 63 in the back-up roll 61 for grooving thin wall pipe in a manner that will be apparent hereinarter.
Each ~lde plate 66, has in lt~ inner surface a pair of spaced, parallel, vertically extending groove 81, which register with the like pair of grooves in the opposite side wall 66, and with the legs 72 of yoke member 71. ~ach leg 72 of member 71 has on each of its opposed end surfaces guide means in the form of , for example, a pair of spaced~ cylin-drlcal pins 83, which pro~ect slidably into one of the grooves 81 (see Fig. ~) to guide t~e ~egs 72 of the yoke member for vertical reciprocation between plates 66, and rearwardly of a partial cover plate 85 (Fig. 2) which extends between the outer edges of plates 66.
The yoke member 71 normally is urged upwardly and to-ward the lower end of the ram 69 by means of a plurality of tension springs 86, which are mounted in the ~per ends of the grooves 81 in the sideplates, with one end of each spring 86 fixed to the upper end of the a3sociated groove 81, and secured at its lower end to the uppermost guide pin ~3 of the associated pair thereof. When the ram 69 is fully re-tracted, the springs 86 dr~w the yoke member 71 to its uppermost position in which one end of shaft 74 is engage-able in a recess 87 in the lower edge o~ cover plate 85.
A pin or bolt ~7 is secured at one end to the upper end o~ yoke member 71, and proJects at its upper end slid-ably through a registering opening 88 ~n plate 67. A pair of nuts 8g is threadably ad~usted onto the upper end of bolt 87 with the lower o~ the two nuts bein~ engageable with plate 67, when the ram 69 is operated to lower the yoke member 71, thereby to limit the exte~ to which the groov~n~ roller 61 can be lowered.
Although not so described in detail here1n, -lt will be understood that the yoke member 51 is guided for movement between plates 46 by guide means of the type described in connection with member 71; and member 51 likewise carries a bolt 91 having thereon ad~usting nuts 92 engageable with plate 47 ad~ustably to limit the descent of grooving roll 52.
Secured on the surface of base plate 11 outwardly of one of the side walls 46 is a hydraul~ hand pump 94, which has thereon a pivotal operating hand~ 95, which can be manipu-lated in known manner in order to develop pressure in the cylinder 94. The discharge end of cylinder 94 is connected by flexible tubing 96 to the upper end of the ram housing 48.
The housing 97 for a slmilar but larger hand pump is secured also on plate 11 adJacent the opposite end thereof, and out-wardly of one of the side walls 66 (the left hand side wall as illustrated in Fig. 2). Pivotally mounted on housing 97 is the pump operating arm 98, which is adapted to be operated manually in the manner similar to the arm 95 for the pump 94. The output oP outlet Or the pump housing 97 is connected by flexible tublng 99 to the upper or inlet end Or the ram housing 68.
In use, the motor 21 i8 adapted to be turned on and off by a manually-operable switch, such as for example by a foot switch denoted at 101 (Fig. 1), which may be connected by a lead 102 ~n any conventional manner to the motor 21. Preferably the motor is a reversible, AC motor, the direction of rotatlon if which is controlled by a manually-operableswitch 104, which is mounted on the underside of the base plate 1~ as illustrated in Fig. 1. In one posltions switch 104 causes the shafts 33 and 34 to rotate in one direction, and in a second, posltion lt causes the shafts to rotate ~n the opposite direction. If switch 104 is of the three-position variety, it can be connected in cir~
cuit with motor 21 to stop rotation of its armature notwith-standing the ~act that switch 101 is closed. A three-position l~q838~
switch of this type is psrt1cularly useful in those cases where ~t might be desira~le to rotate the shaft 34 in one direction during use of the grooving roll 73, and to rotate shaft 33 ~n the opposite direction, when utilizing the grooving roll 52. Of course, in those cases where the shafts 33 and 34 are designed to rotate in the same direction during use, the use of a reversible motor 21 would not be necessary. In such ca~e also, it would be possib~ to operate both of the grooving rolls ~2 and 73 simultaneously.
W~enever pipe is to be grooved on the backup roll 41 or 61, the associated hand pump 94 or 97 is operated eit~er to cause the ram 49 or 69 to d~ive the associated yoke member 51 or 71 downwardly to the exten~ permitted by the associated limiting mechanism represented by a bolt 91 and nuts 92, or by the bolt 87 and nuts 89. At this time the section of pipe whlch is to be grooved is held over the now-rotating backup roll 41 or 61, so that the moment that the pipe is engaged by the operat~ng boss ~4 or 75 on the associated grooving roll 52 or 73, the pipe that is to be grooved is clamped firmly between the now-descending grGov~ng roll and the associated backup roll 41 or 61. Consequently, the pipe in questiorl now begins to rotate, and as the associated grooving roll 52 or 73 continues to descend, it causes an annular ~roove to be formed in the rotating pipe. After ~he groove has been formed in the pipe section, the pressure in the associated ram cyllnder 48 or 68 is released by a conventional valve mechanism (not illustrated~, so that the ram 49 or 69 is free to return to i~s retracted (upper) position in respon~e to the force generated on the associated yo~e member by its retracting springs, such as those denoted at 86 in Fig. 2. The now-grooved pipe is thereby released and removed from over the as~ociated bac~up roll 41 or 61.
From the foregoing it will be apparent that appllcant has devised a relatively simple and inexpenslve machine for enabling ~q~380 the p~oduction of both relatively large and relatively small diameter thin walled pipe on the same machine, and without requiring any shut down of the machine for substitution of one type Or backup roll for another. The drive mechanism which forms part of this novel machine not only permits both the small (41) and the large (61) backup rolls to be driven simultaneously, but also provides for driving these rolls at different rates.
Moreover, each of the grooving rolls 52 and 73 is provided with means for limiting the extent to which the grooving roll will be driven O~wnwardly during an operating sequence, thereby enabling the depth of the groove produced in the thln walled pipe to be controlled merely by adJusting the nuts 89 or 92.
While ~o~ the embodiment illustrated it has been suggested that manual hand pumps be employed for supplying hydraulic fluid to the ram operating cylinders 48, 68, it will be apparent to one skilled in the art that automatically operated hydraulic supply means could likewise be employed utilizing, for example, a common sump from which hydraulic fluld 19 supplled selectlvely to the housings 48 and 68, after which the exhau~ted fluid would be returned to the sump or r~servoir~ Likewise, as noted above, the exact type of electrical motor which i~ utilized to drive the shafts 33 and 34, and the respective rates at which the shafts are rotated can be changed depending upon the type of thin walled plpe that is to be grooved.
Moreover, while Gnly a single embodiment of thl~ ~nvent~on has been illustrated and descr~bed ln detail herein, it will be apparent that the invention i8 capable o~ ~till further modification, and that this application is intended to cover any such modifications as may fall within the scope of one skilled in the art or the appended claims.
This ~nvention relates to roll groovers for thin walled pipe, and more particularly to a tandem roll groover machine which is capable of grooving both relatively large and small diameter pipe.
Known devices for grooving thin walled pipe comprise, typically, a grooved backup roll over which is inserted one end of a sectlon of thin walled pipe which is to be grooved.
The backup roll is positioned beneath a vertically movable grooving rollg which has on its outer peripheral surface a circumferential boss, or pro~ection, which registers with the groove in the backup roll. In use, the backup roller is rotated, and the rotatable grooving roll is ~orced vertically downwardly lnto engagement with the thin walled pipe, which then begins to rotate as the result of frictional contact between the pipe and the grooved backup roll. As the grooving roll de~cends it deforms the thin walled pipe downwardly into the registering groove in the backup roll, thus rorming an annular groove in the pipe ad~acent said one end thereof.
As pointed out in my copending Canadian application Serial No. 292,127, which ~as flled December 1, 1977, and which is entitled Backup Roll For Thin Walled Pipe Grooving Device, di~ficulty has been encountered heretofore when grooving thin walled pipes of rather small diameters, for example pipes having -diameters of 12 inch or less To solve this problem, my above-noted applica~ion disclosed ~! novel, solid backup roll attachment, which is adapted to be employed ln place of the - u~ual, annular-type o~ backup roll. While this novel backup roll has the advantage that it enables an operator to use the same grooving device or machine on both relatively small and large d1ameter pipes, it nevertheless requires some modification of the existing, or conventional grooving machlne; and it also necessitates shutting down a machine each time one type of backup roll is to be removed and replaced by the other.
lQQ83~0 Accordingly, it is an object of this invention to provide an improved roll grooving machine which utilizes a single driving mechanism for operating two separate sets of grooving rolls. Such a machine enables the grooving of both relatively ~mall and large diameter thin walled pipe without having to shut down the machine and make a substitution of one type of ~ckup roll for another While Canadian patent ~o. 560J459 d~scloses flange forming apparatus which utilizes a single shaft for supporting two exterior dies, the apparatus requires the use of separate, movable carriages for moving the cooperating exterior dies into and out of operative pos-itions relative to the interior dies, and it is not possible to drive the interior dies at different speeds.
A further obJect of this invention is to provide a tandem roll grooving device having two sets of groovi~g rolls wh~ch can be operated, optionally, either in unison or individually.
Other ob~ects of the invention will be apparent hereinafter from the specification and from the recital of the appended claims, particularly when read in conjunction with the accompany-ing drawings.
In the drawings:
Fig. 1 is a fragmentary, front elevational view of a tandem roll grooving machine made accordlng to one embodiment of this invention, portions of the machine being cut away and shown in section for purposes of illustration; and Fig. 2 is a fragmentary end elevational view of this machlne, as seen when looking towards the left of machirle as shown in Fig. 1.
Referring now to the dr~wings by numerals of reference, 10 denotes generally a tandem roll grooving machine oomprising a base plate 11, which is generally rectangular in con~iguration, and which is supported adjacent ~ts corners on the upper ends o~
1(3983B~
four, spaced, telescopically adJustable legs 13. The lower section 14 of each ~eg 13 is slidable at its upper end tele-scopically in the lower end of the upper, tubular leg section, and is adapted to be secured ad~ustably relative to its upper section by a pair of adJusting nuts 15 (Fig. 2) which thread into each upper section for engagement at their inner ends with the lower sections 14.
Secured to the underside of plate 11 ad~acent one end thereof is an electric motor 21, ~aving an output shaft which is drivingly connect~d to a speed reducer 22 that is also mounted beneath plate 11 adJacent one end of the motor 21. The output shaft 23 of the speed reducer pro~ects into one side of a drive housing 24, which is secured intermediate its ends in a centra~l opening in base pla~e ~. Secured to the shaft 23 ~or rotation thereby in the houslng 24 is the hub 26 of a double sprocket having thereon a pair Or axially-spaced sprocket wheels 27 and 28. In the embodiment lllustrated, the two wheels 27 and 28 are shown to ~e the same sizeJ and merely by way of example, each may have the~En twenty-one teeth.
Secured to the surface of the base plate 11 ad~acent opposite ends thereof are two pairs of ~paced pillow blocks 31 and 32, respectively, the bores of which are axially aligned.
Rotatably ~ournaled intermedlate its ends in the bores of the pillow blocks 31 is a first, backup roll support~ng shaft 33, one end of which (the left end is ~hown in Fig. 1) pro~ect~ into on~ side of the drive housing 24 where the latter pro~ects above the upper surface of plate 11. Rotatably ~ournaled intermediate 1ts ends in the ~ores of the other two pillow blocks 32 is a second backup roll supporting shaft 34, which al50 proJects at one end (its right end in Fig. 1) into the upper end of housing 24 in spaced, coaxial relation to the inner end of shaft 33. Secured to the inner end of shaft 33 in hous~ng 24 is a sprocket wheel 35, the teeth of which are connected lQ"83~
by a chain 36 to the teeth of wheel 27 on the speed reducer shaft 23. Similarly, a sprocket wheel 37, which i3 secured to the inner end of shaft 34 in housing 24, is drivingly connected by a further chain 38 to the sprocket wheel 28.
In the embodiment illustrated, the sprocket wheel ~5 is smaller than the wheel 37J and has thereon thir-ceen teeth, as compared ~or example to twenty-one teeth on the wheel 37.
As a consequenceJ when the wheels 35 and 37 are driven throu~h chains 36 and 38 by the wheels 27 and 28J the shaft 33 will be rotated at a slightly higher speed than that o~ the shaft 34.
These relative speeds and sprocket wheel sizes a~ disclosed hereln are glven merely by way of example.
Secured to the outer end of shart 33 coaxially thereof is a solidJ cylindrical backup roll 41J which may be similar in conrigurat1on to the backup roll dlsclosed in my above-noted copending Canadian patent application Serial No. 292,127.
Roll 41 has a threaded shank portlon 42J which ls threaded in-to an axlal bore formed ln the outer end of shaft 33 coaxlally thereof. An externalJ circumferentlal shoulder 43 1B formed on roll 41 lntermediate its ends ror engagement with the outer termlnal end of shaft 33 to llmit the extent to ~hich the roll can be threaded into ~hart 33. Forwardly, or to the risht of the shoulder 43 as shown ~n Fig. 1, roll 41 has ln its per-ipheral surface an annular groove 44, which is used to form a groove in thin walled pipe as noted hereinarter.
Secured on the base plate 11 ad~acent opposite sides Or sha~t 33, and outwardly Or the pillow blocks 31, are two, spaced, parallel, vertically disposed side plates 46. Secured to and extending transversely between the upper edges of plates 46, and overlying the backup roll 41, 1~ a horlzontally disposed coverplate 47. Secured at its lower ends on the plate 47 above and in re~istry wlth the groove 44 in the backup roll 41 is the ~ylindrical housing 48 of a hydraullc ram. Pro-~q83~
Jecting out of the lower end of housing 48 and through a registering opening in the cover plate 47 is a vertically roc-iproca~le ram or piston rod 49, the lower end of which engages an inverted, generally U-shaped yoke member 51. Member 51 is mounted betwcen plates 46 for vertical reciprocat~on above roll 41 in ~anner which will be apparent hereinafter. It carrres a rotatable grooving head or roll 52, opposite ends of which are rotatably ~ourn~led in the legs 53 of yoke 51 to pota~ce ~erebetween about an axis which extends parallel to, and ls in the same vertical plane as, the axis of the backup roll 41. The gr~ving head 52 ha~ thereon the usual circum-- ferential grooving boss or operating sur~ace 54, which registers with, and is complimentary to~ the groove 44 in the backup roll 41.
At the opposite end of base plate 11 an annular backup roll 61 is secured by a bolt 62 coaxially to the outer end of shaft 34, and has in its peripheral surface an annular groove 63, which is designed to groove thin walled pipe having a diameter lapger than the type of pipe whlch is designed to be grooved by the bakkup roll 41. Also at this end of the base plate, two, spaced, parallel side walls 66 pro~ect upwardly from the plate 11 and support on their upper ends a horlzontally disposed cover plate 67, which o~erlies the backup roll 61.
The housing 68 of a further ram i~ secured on plate 67 above and in registry with the backup roll 61, and has a reciprocable operating ram or rod 69 which proJects downwardly through a registering opening in plate 67.
The lower end of ram 69 engages the closed end o~ an inverted, generally U-shaped yoke member 71, which carr~es between its legs 72 a rotatable grooving head or roll 73. This roll is mounted on a shaft 74 which is rotatabl~y ~ournaled at opposite ends on the legs 72 of the yoke member 71, and has on its outer peripheral surface a c~rcumferential boss or operating surface 75, which registers with the groove 63 in the back-up roll 61 for grooving thin wall pipe in a manner that will be apparent hereinarter.
Each ~lde plate 66, has in lt~ inner surface a pair of spaced, parallel, vertically extending groove 81, which register with the like pair of grooves in the opposite side wall 66, and with the legs 72 of yoke member 71. ~ach leg 72 of member 71 has on each of its opposed end surfaces guide means in the form of , for example, a pair of spaced~ cylin-drlcal pins 83, which pro~ect slidably into one of the grooves 81 (see Fig. ~) to guide t~e ~egs 72 of the yoke member for vertical reciprocation between plates 66, and rearwardly of a partial cover plate 85 (Fig. 2) which extends between the outer edges of plates 66.
The yoke member 71 normally is urged upwardly and to-ward the lower end of the ram 69 by means of a plurality of tension springs 86, which are mounted in the ~per ends of the grooves 81 in the sideplates, with one end of each spring 86 fixed to the upper end of the a3sociated groove 81, and secured at its lower end to the uppermost guide pin ~3 of the associated pair thereof. When the ram 69 is fully re-tracted, the springs 86 dr~w the yoke member 71 to its uppermost position in which one end of shaft 74 is engage-able in a recess 87 in the lower edge o~ cover plate 85.
A pin or bolt ~7 is secured at one end to the upper end o~ yoke member 71, and proJects at its upper end slid-ably through a registering opening 88 ~n plate 67. A pair of nuts 8g is threadably ad~usted onto the upper end of bolt 87 with the lower o~ the two nuts bein~ engageable with plate 67, when the ram 69 is operated to lower the yoke member 71, thereby to limit the exte~ to which the groov~n~ roller 61 can be lowered.
Although not so described in detail here1n, -lt will be understood that the yoke member 51 is guided for movement between plates 46 by guide means of the type described in connection with member 71; and member 51 likewise carries a bolt 91 having thereon ad~usting nuts 92 engageable with plate 47 ad~ustably to limit the descent of grooving roll 52.
Secured on the surface of base plate 11 outwardly of one of the side walls 46 is a hydraul~ hand pump 94, which has thereon a pivotal operating hand~ 95, which can be manipu-lated in known manner in order to develop pressure in the cylinder 94. The discharge end of cylinder 94 is connected by flexible tubing 96 to the upper end of the ram housing 48.
The housing 97 for a slmilar but larger hand pump is secured also on plate 11 adJacent the opposite end thereof, and out-wardly of one of the side walls 66 (the left hand side wall as illustrated in Fig. 2). Pivotally mounted on housing 97 is the pump operating arm 98, which is adapted to be operated manually in the manner similar to the arm 95 for the pump 94. The output oP outlet Or the pump housing 97 is connected by flexible tublng 99 to the upper or inlet end Or the ram housing 68.
In use, the motor 21 i8 adapted to be turned on and off by a manually-operable switch, such as for example by a foot switch denoted at 101 (Fig. 1), which may be connected by a lead 102 ~n any conventional manner to the motor 21. Preferably the motor is a reversible, AC motor, the direction of rotatlon if which is controlled by a manually-operableswitch 104, which is mounted on the underside of the base plate 1~ as illustrated in Fig. 1. In one posltions switch 104 causes the shafts 33 and 34 to rotate in one direction, and in a second, posltion lt causes the shafts to rotate ~n the opposite direction. If switch 104 is of the three-position variety, it can be connected in cir~
cuit with motor 21 to stop rotation of its armature notwith-standing the ~act that switch 101 is closed. A three-position l~q838~
switch of this type is psrt1cularly useful in those cases where ~t might be desira~le to rotate the shaft 34 in one direction during use of the grooving roll 73, and to rotate shaft 33 ~n the opposite direction, when utilizing the grooving roll 52. Of course, in those cases where the shafts 33 and 34 are designed to rotate in the same direction during use, the use of a reversible motor 21 would not be necessary. In such ca~e also, it would be possib~ to operate both of the grooving rolls ~2 and 73 simultaneously.
W~enever pipe is to be grooved on the backup roll 41 or 61, the associated hand pump 94 or 97 is operated eit~er to cause the ram 49 or 69 to d~ive the associated yoke member 51 or 71 downwardly to the exten~ permitted by the associated limiting mechanism represented by a bolt 91 and nuts 92, or by the bolt 87 and nuts 89. At this time the section of pipe whlch is to be grooved is held over the now-rotating backup roll 41 or 61, so that the moment that the pipe is engaged by the operat~ng boss ~4 or 75 on the associated grooving roll 52 or 73, the pipe that is to be grooved is clamped firmly between the now-descending grGov~ng roll and the associated backup roll 41 or 61. Consequently, the pipe in questiorl now begins to rotate, and as the associated grooving roll 52 or 73 continues to descend, it causes an annular ~roove to be formed in the rotating pipe. After ~he groove has been formed in the pipe section, the pressure in the associated ram cyllnder 48 or 68 is released by a conventional valve mechanism (not illustrated~, so that the ram 49 or 69 is free to return to i~s retracted (upper) position in respon~e to the force generated on the associated yo~e member by its retracting springs, such as those denoted at 86 in Fig. 2. The now-grooved pipe is thereby released and removed from over the as~ociated bac~up roll 41 or 61.
From the foregoing it will be apparent that appllcant has devised a relatively simple and inexpenslve machine for enabling ~q~380 the p~oduction of both relatively large and relatively small diameter thin walled pipe on the same machine, and without requiring any shut down of the machine for substitution of one type Or backup roll for another. The drive mechanism which forms part of this novel machine not only permits both the small (41) and the large (61) backup rolls to be driven simultaneously, but also provides for driving these rolls at different rates.
Moreover, each of the grooving rolls 52 and 73 is provided with means for limiting the extent to which the grooving roll will be driven O~wnwardly during an operating sequence, thereby enabling the depth of the groove produced in the thln walled pipe to be controlled merely by adJusting the nuts 89 or 92.
While ~o~ the embodiment illustrated it has been suggested that manual hand pumps be employed for supplying hydraulic fluid to the ram operating cylinders 48, 68, it will be apparent to one skilled in the art that automatically operated hydraulic supply means could likewise be employed utilizing, for example, a common sump from which hydraulic fluld 19 supplled selectlvely to the housings 48 and 68, after which the exhau~ted fluid would be returned to the sump or r~servoir~ Likewise, as noted above, the exact type of electrical motor which i~ utilized to drive the shafts 33 and 34, and the respective rates at which the shafts are rotated can be changed depending upon the type of thin walled plpe that is to be grooved.
Moreover, while Gnly a single embodiment of thl~ ~nvent~on has been illustrated and descr~bed ln detail herein, it will be apparent that the invention i8 capable o~ ~till further modification, and that this application is intended to cover any such modifications as may fall within the scope of one skilled in the art or the appended claims.
Claims (10)
1. A tandem roll grooving device for grooving thin walled pipe of various diameters, comprising a base, a pair of spaced shafts mounted on said base for rotation independently of each other about stationary axes, a drive motor on said base, means connecting both of said shafts to said motor to be driven thereby simultaneously, a first backup roll mounted coaxially on one end of one of said shafts for rotation thereby, a second backup roll mounted coaxially on one end of the other of said shafts for rotation thereby, a pair of spaced, rotatable grooving rolls, and stationary means fixed on said base and supporting said grooving rolls for reciprocation in fixed, vertical paths above said backup rolls, each of said grooving rolls having on its periphery a circumferential boss registering with a groove in the associated backup roll for operative engagement with a section of thin walled pipe positioned thereover, and each of said backup rolls being supported during a grooving operation solely by said one end of the shaft to which it is secured.
2. A tandem roll grooving device as defined in claim 1, wherein said one backup roll has an outside diameter greater than that of said other backup roll, and is disposed to be used in grooving thin walled pipe having diameters in the range from two inches to twelve inches, and said other backup roll has an outside diameter less than one inch, and is disposed to be used in grooving thin walled pipe having a diameter of one and one hair inch or less.
3. A tandem roll grooving device as defined in claim 2, including means mounting said shafts on said base for rotation coaxially about a common axis, and selectively in opposite directions about said common axis.
4. A tandem roll grooving device as defined in claim 3, wherein said connecting means includes means for rotating said one shaft faster than said other shaft, and said other backup roll is secured to said one shaft, whereby it is rotated faster than said one backup roll.
5. A tandem roll grooving device as defined in claim 4, wherein said drive means comprises an electric motor fastened to the underside of said base, and having a speed reducer connected to its armature, a separate sprocket wheel is fixed to each of said shafts adjacent the opposite end thereof, and said connecting means comprises a double sprocket wheel mounted on the output of said speed reducer, and a pair of chains connecting said double sprocket wheel to said separate sprocket wheels on said spaced shafts.
6. A tandem roll grooving device as defined in claim 1, including means for selectively lowering each of said grooving rolls from an inoperative position in which it is vertically spaced above the backup roll with which it registers, to an operative position in which the boss in the periphery of the grooving roll projects a predetermined distance into the groove in the registering backup roll, and adjustable means interposed between said base and each of said grooving rolls and operative to limit the downward movement of each of said grooving rolls from its inoperative to its operative position.
7. A tandem roll grooving device as defined in claim 6, wherein said means for selectively lowering said grooving rolls comprises a pair of manually operable pumps mounted on said base, and hydraulic means interposed between said grooving rolls and the outputs of said pumps, and operative to lower each of said grooving rolls upon operation of the pump assoc-iated therewith.
8. A tandem roll grooving device as defined in claim 7, wherein said stationary supporting means comprises a pair of spaced, confronting side plates secured to and projecting vert-ically upwardly from said base adjacent opposite sides of each of said backup rolls, a yoke member is mounted for limited vertical movement between each pair of said side plates and above one of said backup rolls, means rotatably supports each of said grooving rolls between the legs of one of said yoke members for movement thereby toward and away from the registering backup roll, and spring means urges each of said yoke members into one of its limit positions relative to the pair of side plates between which it is mounted.
9. A tandem toll grooving device as defined in claim 7, wherein said hydraulic means includes a cylinder supported on each pair of said side plates above the associated yoke member, and having a reciprocable ram movable out of the lower end of said cylinder and connected to the last-named yoke member to effect movement thereof against the resistance of said spring means
10. A tandem roll grooving device as defined in claim 1, wherein one of said backup rolls is a solid, cylindrical member, and the other backup roll is an annular member having an out-side diameter greater than that of said one backup roll.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US05/892,383 US4166370A (en) | 1978-03-31 | 1978-03-31 | Tandem roll groover |
| US892,383 | 1978-03-31 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1098380A true CA1098380A (en) | 1981-03-31 |
Family
ID=25399874
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA320,264A Expired CA1098380A (en) | 1978-03-31 | 1979-01-25 | Tandem roll groover |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US4166370A (en) |
| CA (1) | CA1098380A (en) |
Families Citing this family (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5575168A (en) * | 1994-01-12 | 1996-11-19 | Wilson Tool International, Inc. | Workpiece-deforming tool and die for use in a punch press |
| US5555759A (en) * | 1994-01-12 | 1996-09-17 | Wilson Tool International, Inc. | Workpiece-deforming tool and die for use in a punch press |
| US6131430A (en) * | 1998-10-20 | 2000-10-17 | Mate Precision Tooling Inc. | Tool and method for the rolling treatment of a workpiece |
| US6272895B1 (en) | 2000-05-16 | 2001-08-14 | Emerson Electric Co. | Roll grooving apparatus |
| US6935152B2 (en) * | 2002-04-16 | 2005-08-30 | Victaulic Company Of America | Orbiting roller groover for pipe |
| US7497105B2 (en) * | 2002-06-05 | 2009-03-03 | Antonios Anagnostopoulos | Machine and method for parallel production of similar products, through straightening and bending of wires, wire rods, metal tubes or other material of prismatic cross section |
| US6708545B1 (en) * | 2002-11-13 | 2004-03-23 | Emerson Electric Co. | Roll grooving apparatus |
| US6993949B2 (en) * | 2004-02-12 | 2006-02-07 | Victaulic Company | Power or manually operated pipe grooving tool |
| JP4969049B2 (en) * | 2004-04-06 | 2012-07-04 | 株式会社アマダ | Bending machine |
| US20090078017A1 (en) * | 2007-09-26 | 2009-03-26 | Harold Allen | Roll grooving apparatus |
| US8091397B1 (en) | 2007-09-26 | 2012-01-10 | Harold Allen | Compact roll grooving apparatus with adjustable mounting and extended backup roller shaft |
| EP2403676B1 (en) * | 2009-03-06 | 2013-12-25 | Victaulic Company | Pipe processing device having floating drive roller |
| US10022801B1 (en) | 2015-12-01 | 2018-07-17 | Gregory Devaney | Pipe bracing device for pipe machining apparatus |
| CN108057751A (en) * | 2017-12-13 | 2018-05-22 | 潍坊江钢机械有限公司 | Portable double hydraulic control channelling machine |
| CN107962371A (en) * | 2017-12-13 | 2018-04-27 | 潍坊江钢机械有限公司 | Easy-to-mount channelling machine cam erecting device |
| CN109047437A (en) * | 2018-08-06 | 2018-12-21 | 江门市新会区爱邦宝金属制品有限公司 | A kind of commonplace muscle automatic punching device of spout |
| WO2024069331A1 (en) * | 2022-09-27 | 2024-04-04 | Miramondi Impianti S.P.A. | Groove forming device for forming a circumferential groove in a hollow cylindrical sheet metal part and processing apparatus for forming a first circumferential groove and asecond circumferential groove comprising such groove forming device |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA560459A (en) * | 1958-07-15 | Surface Combustion Corporation | Flange forming apparatus | |
| US1205605A (en) * | 1915-08-12 | 1916-11-21 | Long Mfg Co Inc | Device for simultaneously performing two operations on an article. |
| US3903722A (en) * | 1974-06-28 | 1975-09-09 | Victaulic Co Of America | Roll grooving tool |
-
1978
- 1978-03-31 US US05/892,383 patent/US4166370A/en not_active Expired - Lifetime
-
1979
- 1979-01-25 CA CA320,264A patent/CA1098380A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| US4166370A (en) | 1979-09-04 |
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