US2228745A - Combined feeding and cold drawing mechanism for heading machines and the like - Google Patents

Description

L. BERKEBIL 2,228,745

COMBINED FEEDING AND COLD DRAWING MECHANISM FOR HEAD ING MACHINES AND THE LIKE Jan. 14, 1941.

3 Sheets-She 1 Filed March 16, 1936 11v VENTOR ATTORNEYS min Jan. 14, 1941. BERKEBIL COMBINED FEEDING AND COLD DRAWING MECHANISM FOR HEADI NG MACHINES AND THE LIKE Filed larch 16, 1956 3 Sheets-Sheet 2 NVENTOR BERKEBIL LEE.

ATTORNEYS Jan. 14, 1941. BERKEBY|L I 2,228,745

COMBINED FEEDING AND COLD DRAWING MECHANISM FOR HEADING MACHINES AND THE LIKE Filed March 16, 1956 s Sheets-Sheet s FIGJI.

11V VEN TOR LEE BERKEBIL ATTORNEYS H65; FIG-.6.

- uNiTEo' STA-TES Patented Jan. 14, 194 1 PATENT orricaf comnvnn FEEDING meow nn swnva MECHANISM ron nnsnmo moms AND THE Lee Berkebil, Detroit, Mich., assignor to B. Manufacturing Company, Detroit, Mich, a corporation of Michigan Application March 1s, 1936, Serial Kai-$9.24?

I feed mechanism were engage passing through the die.

The invention relates toheading machines and the like and has for its primary object the obtaining .of a construction for feeding the stock to the cut-oil! mechanism and simultaneously subjecting it to a cold drawing operation. Thus,

the machine-isadaptedto use hot-rolled, as dis-- tinguished from cold-drawn material, while the cut ofl sections have finished surfaces'and are of accurate dimensionl. The invention, there fore, consists in the construction as hereinafter set forth.

In the drawings:

Figure l is a plan view of my improved mechanism as applied to a heading machine;

16 Figure 2 is a longitudinal section partly in ele vation taken substantially on line 2-2 of Fig-' ure 1, and showing-diagrammatically by dot and dash lines the position of a die for engagement with the stock when the latter. is to be drawn through the'die:

Figure 3 is a similar view showing the parts in a diiferent position of adjustment; Figure 4 is a cross-section through: the straightening means on line 4-4 of Figure 2;

Figure 5.is a cross-section through thefeeding means online 5-! of Figure 2;

Figure 6 is a similar section taken on line l6 of Figure 2;'

4 eling in ways 0 upon said bed, and carrying the vertical reciprocating slide B to which is fastened the punch block 3?. The member B is reciprocated by suitable mechanism including the rotary crank shaft E and a connectinglinkage' F between the same and the member B.

My improved mechanism comprises straightening dies G, a reciprocating feed mechanism H and a drawingor sizing die I. As shown, and as preferably arranged, the stock J, preferably hot- 50 rolled, is first delivered to the straightening dies G; is then engaged by the feeding mechanism H; and is lastly passed through the drawing and sizing die I. This speciflcarrangement is not absolutely l essential, but I prefer the same as it 65 avoids any-.marring, suchas might occur if the Figures 7 and 8 are-end elevations showing ,The straightening mechanism G may be of any suitable construction adapted to take out any curvature in the stock as delivered thereto. As shown, it consists of a pair of jaws G, G which areslidably secured in a frame including the side plates G, G and spacers G, G. The frame is slidable' in ways G fastened by bolts G to the bed A. As shown, these .ways G' comprise vertically spaced horizontal bars provided in their inner faces at their'opposed edgeswith longitudinally extending s1ots,or channels G! that receive vertical ribs G" of the side plate-G of the slidable frame and permit a limited movement thereof. The jaws G' and G are held from endwise movement by keys G e gaging the plates G and G The lower jaw is adjusted vertically by' two spaced set screws (3 which permitof properly aligning it with the work, and the jaw G' isadjusted by a single set screw- G"- 1 Thus, these jaws can 'be clamped upon the work with just sufiicient pressure to perform the straightening operation and to give the necessary resistance against back. feeding. The sliding movement of the frame is limited by stops '0". These are preferably set screws whichthreadediy engage lugs G of the ways G" in-the .path ofthe plate G forward and in rear there-v of. These'stops may be adjusted inthe lugs 6 to prevent the straightener from being carried The feed mechanism H comprises a pair of plates 1-!" and H with intermediate spacer members H and H these parts being secured toeach other by bolts H. The members H and H have oppositely inclined inner edges-while their outer thestock sue;-

backward-during the rearwardmovement of the feed mechanism.

edges are vformed'into racks H. Shoes H".se--

cured to thebed by bolts H' engage the-upper and lower edges of the inner plate'H to form guideways therefor. Within the space between the members H and H are arranged a pair of Jaw members I-P'and H" which are wedge shaped "and have their outer'edges arranged parallel to the inclined inner edges of the members Hand H Rolls H are arranged between the parallel faces of the jaw members and the members H and'H and springs H bearing against the large ends of the wedged jaw members'H'and H" yieldably press the same in a rearward direction. The whole construction constitutes a frictional one-way clutch which will cause the law members H andI-I tovgrip the work when movingin a forward direction and to release it when moving in a rearward direction. This forward and reversemovement is effected by pinions 8"" which engage the rack members H and are mounted on shafts I!" carried by the bed. The

and feed it forward, while upon a reverse rotation of the pinions as indicated by the arrows in Figure '3 the stock-will be released and the plates and jaws will'be moved rearward. The shafts H are connected to each other by intermeshing gearsH" and one of these gears is actuated by mechanism to be-herei'nafter described.

The sizing die I may be of anysuitable construction adapted .to slightly reduce the diameter of the stock when pressed therethrough and to impart thereto a ilnished surface. This die. is

mounted on the bed in alignment with the.

' straightening dies G and feed mechanism H, and

a tank I adjacent to the die contains a suitable lubricant for reducing friction-during the drawing operation and for coating the stock to facilitate the heading operations. There is also an upwardly opening tank G of sheet metal receiving and forming a jacket for the straishtem.

ing mechanism G and containing a lubricant for the stock in passing therethrough. Preferably this tank is held in place by the bolts G usedto fasten the ways Gr to the bed A and has suitable openings for receiving the stops (3.

Forward of the die I in the direction of feed there is a cut-off mechanism which is associated with other elements of the particular machine-to which the cut-off blanks are to-be fed. If this ferred laterally to a heading die. The specific construction of this heading machine forms no machine is, as shown, a heading machine, the stock is cut into suitable lengths and then transpart of the present invention and I shall, therefore, only describe it generally. Mounted on the ,bed'is a member J apertured for the passage of the stock therethrough and forming onemember of a shear. The cooperating member J of the shear is mounted to slide transversely across the face of'themember .1 and in so doing to sever the projecting portion of the stock. The member J has secured thereto a resilient clip J which yieldably holds .the cut-off blank during transfer of the same into alignment with the heading die and punch members K, K and K. These members are -adapted .to engage the blank after whichit will be released by the clip J and the latter together with the member J will be returned to initial position. It isdesirable to provide means for very accurately gaging the length of thecut-ofl blanks; This might be accom- .plished by regulating the angle of'oscillation of the pinions H but it would be diflicult to accomplish this with the degree of accuracy required. I, therefore, adjust the angle of oscillation to slightly greater than the length .of feed required and subsequently feed thestock backward. This is accomplished by an adjustable stop L which in one position is in alignment with the projecting portion of the stock and during the movement of the head B will bear against the outer end of said projecting portion and feed it backward. The stop L is attached to a blockL' which in. turn is.adjustably mounted on punch block B. In operation blockB is moved vertically from a position where the stop L aligns shafts H and pinions H" will be oscillated spasms with the stock to a position out of alignment therewith. The stop L is preferably provided witha screw threaded shank engaging the block L and a lccknut L' serves to hold this shank in each position of adjustment.

The general operation of the mechanism is as follows: t

The shaft E has a crank or eccentric E thereon which is connected bya rod F with the reciproeating-member B. The shaft E also has a gear wheel E which drives an intermeshing gear wheel El ina 1 to 2 ratio. The gear wheel E is on a shaft E which extends to the opposite side .of the machine and on each end of this shaft is a variable throw crank. On one end the crank 0 15 has a slot 0' for en aging a crank pin 0' which is adjustable radially. in said slot to increase or diminish the throw thereof. This pin is connected by a rod 0 with a bell crank lever O and' E, one revolution is imparted-to the crank o and 2 one reciprocation to the rod 0 and bell crank lever 0 Also, when the coupling pin 0 is in engagement with the gear H", the latter and the through an arc varying according to the adjustment of the cranks.

On the opposite end of the shaft E is a variable throw crank P similar to O, the crank pin of which is connected .by a rod P with a slide P'. This slide has a cam slot P which engages a pin P on the shhnk of the shear member J Thus, each two revolutions of the crank shaft E will effect one reciprocation of the shear J and ,with a corresponding adjustable crank pin 0 on the actuating arm of said lever. The other arm the slot P is suitably fashioned to give the demounted a cam Q which actuates a reciprocating member Q connected to a rock-arm Q on a rock shaft Q which has an arm Q for actuating the slide B. The cam Q is so fashioned as to intermittently raise and lower the slide B with a dwell at each end of the movement thereof.

With the mechanism as described, it will be understood that two reciprocations are imparted to the slide B to each reciprocation of the shear J and of the slide B. Also, that while the shear J is stationary in the position shown in Figure l, the stock is advanced by the feed mechanism a length slightly greater than that required for the blank and is then fed backward by the gage stop 'L which impinges thereagainst. This will exactly determine the len h to be cut off after which I the shear J" is actuated to effect the cut-off and to transfer the blank int'o alignment with the punch and dies. In the complete operation, each forward movement of the feed mechanism H will first grip the which latter is formed of exceedingly hard material, such as tungsten carbide. After the completion of the forward movement and during the rearward movement of the feeder H, the stop L which is in alignment with the projecting po'rtion of the stock will contact therewith and effect by the sliding of the frame of the-straightening dies G and (3*, while the die I will'ofler suillcient frictional resistance so as to prevent any oyer-- feeding in this reverse direction.- It will thus be appreciated that during each cycle, hot-rolled stock, preferably deiivered'from a coil, is fed forward being-first straightened and subsequently delivered to the sizing die I through which it passes, and thence through the member J to proiectoutward beyond the same. The projecting portion is then pressed rearward by the stop L and subsequently sheared off and delivered to the heading die.

1f, atv any time, there should be necessity for stopping the feeding. of the stock this may be 1 quickly accomplished bywithdrawing the pin 0'.

which will disengagethe bell crankO from the gear wheel H" and wili, therefore, stopthe oscillation of the gear pinions H"; If desired, a sizingdie such as x designated diagrammatically by dot and dash lines in Figure 2 may be rigidly mounted upon the bed A between the straightening'mechanism G and the feed mechanism H. In this instance the stock J would be drawn by the feeding mechanism H through the sizing die X after passing through the straightening mechanism G. Whensuch a sizingdie x is located as desired, the sizing die I may be used as an additional die or dispensed with entirely, as desired. Otherwise, the structure' would be the' same as that previously described.

What I claim as my invention is: 1. In mechanism of the class described, a sizing die, work straightening means, and means for feeding work from the straightening meansto the die-including a pair of opposed work-engaging Jaws movable relative to eachother to alternately grip and release the work, reciprocating side plates for said Jaws, spacers for said plates above and below said jaws and having inclined portions, 'means engaging said inclined portions and operable upon movement of said plates in one direction to cause the Jaws to grip the work, and means operable upon movement of sald'plates in the opposite direction to cause the Jaws to release the work. I

2. Ininechanism of the class described, a sizing die, work straightening means, and means for feeding work from the straightening means to the die, inculding a pair of opposed work-engaging jaws movable relative to each other to alternately grip and release the work, reciprocating side plates for said jaws, spacers for said plates aboveand below said ,iaws, means for reciprocating said plates including racks carried by said spacers, and oscillating pinions engaging saidracks. 3. In mechanism of the class described,a sizing die, "work straightening means, and means for feeding work from the straightening'means to spacers, pinions engaging said racks, shafts'for.-

the die, including a pair of opposed work-engaging jaws movable relative to each other to alternately gripand release the work, reciprocating side plates for. said jaws, spacers for said plates above and below said jaws, means for'reciprocating said platesincluding racks carried by said said pinions, intermeshing gears on said shafts, a reciprocating driver, and a connection between said driver and one of said intermeshing gears for imparting an oscillating motion to said pinions.

4. In mechanism of the class described, a sizing die, work straightening means, and means for feeding work from the straightening means to the .tive to each other.

and below said Jaws, means for reciprocating said 5 plates including a rack rigid with said plates, and v an oscillating pinion engaging aaidrack.

5. In m'echanism of the class described, asizing die, work straightening means, and means for feeding work from the straightening means to the die. including a pair of opposed work-engaging jaws movable relative to each other to alternately grip and release the work, reciprocating side plates for said ,iaws', spacers for said plates above and below said iawsfmeans for reciprocating said 5 plates including racksc'arried by said spacers, and oscillating pinions engaging said racks, said plates extending above and below the racks whereby the pinions hold thesame against lateral displacement. I I

6. In mechanism of the class described, a sizing die, meansfor feeding work to said die, and means for straightening said work for .proper engagement-with said feeding means and die, including a pair ofslidable work-eng n laws, a slidable supporting frame for said Jaws including a pair of spaced side plates, and spacers between said plates, actuating'means for said-Jaws. carried by said spacers, and means engageable with one of said plates to limit sliding movement of said, frame.

' 7. In mechanism of the class described, a sizing die, means for feeding work to said die, and means for straightening said work for proper en gagement with said feeding means and die, including a pair of slidable work-engaging jaws, a supporting frame for said Jawsincluding "side plates upon opposite sides of said jaws, spacers between said plates above and below said jaws, and adjusting means for theiaws including ad- 40 justable means carried by said spacers and engaging said jaws. v

8. In mechanism of theclassdescribed, a sizing die, means for feeding work'to said die,,and means for straightening said work for proper engagement with said feeding means. and die,.including ,a pair ofwork-engaging Jaws, a slid'ably mounted supporting frame for said'iaws, means carried by the frame holding the jaws against endwise movement while permitting movement of the jaws relativeto each other, and means also carried by the frame for moving said .iaws rela- .9. In mechanism of theclass described, a sizing die, and means for causing work to be'moved through said die including a pair of cooperating work-engaging jaws movable relative to each other to alternately grip and release the work A and reciprocable in unison toward and from said die, and means for eil'ecting reciprocation of saidno laws. including a pair of spaced oscillating shafts, -a carrier for said iaws mounted to slide between said shafts, means for translating motion from i said oscillating shafts to said carrier, and means for translating motion from said carrier to'said Jaws.- e 10.'The combination with a bed, of reciprocatory stock feeding means mounted thereon, said meanscomprising a reciprocating frame slidable on the bed, racks on opposite longitudinal edges of said frame, oscillating pinions intermeshing with said racks for reciprocating said frame, a

one-way clutch carried by said frame and including jaws operable automatically to grip the stock when the frame is moving in one direction and 7'5 die, including a pair of opposed work-engaging l nately grip and release the work, reciprocating side plates for said jaws, means for reciprocating said plates including racks carried by said plates,

and oscillating pinions engaging said racks, said plates extending above and below the racks 15 whereby the pinions hold the same against lateral displacement.

12. In mechanism of the class described, a sizing die, and means for moving work through the die, including a pair of opposed work-engaging jaws movable relative to each other to alternately grip and release the work, said jaws having longitudinally extending inclined portions, reciprocating members havinginclined portions substantially parallel to the inclined portions of said 25 jaws, means engaging the inclined portions ofjsa'id jaws and members and operable upon movement v of said members in one direction to cause the jaws to grip the work, and means engaging the adjacent ends of said jaws and operable upon movement of said members in the opposite direction to-cause the jaws to release the work.

13. In mechanism of the class described, a die for the stock, and means for moving stock relative to the die, including a reciprocating frame,

3 racks on the frame at opposite longitudinal edges thereof, oscillating .pinions intermeshing" with said racks for reciprocating said frame, a oneway clutch carried by said frame and including .jaws operable automatically to grip the stock when the frame is moving in one direction and operable automatically to release the stock when the frame is moving in the other direction, and means for oscillating said pinions synchronously to reciprocate said frame.

14. In mechanism of the class described, a die for the work, and means for moving work relative to the die, including a pair of opposed stockengaging jaws movable-relative to each other to alternately grip' and release the work, reciprocating side plates for said jaws, spacers for said plates above nad below said jaws and having inclined portions, means for reciprocating said ;plates including a rack carried bi one of said spacers and an oscillating pinion engaging said rack, means engaging the inclined portions of the spacers and operable upon movement of said plates in one direction to cause the jaws to grip the work, and means operable upon movement of said plates in the opposite direction to cause the jaws torelease the work. 1 a 15. In mechanism of the class described, a die for the work, and means for moving work relative to the die, including a pair of opposed work-engaging jaws movable relative to each other to alternately grip and release the work, reciprocating side plates for. said jaws, spacers for said plates above and below said jaws, meansifor reciprocating said plates including racks carried by said i 70 Spacers, and oscillating pinions 12118 8 8 said racks.

16. In mechanism of the class described, a die for the work, and means for moving work relative to the-die, including a pair of opposed work-engaging jaws movable relative to each other to alternately grip and release the work, reciprocating side plates for said jaws. spacers for'said plates above and below said jaws, means for reciprocating said plates including racks carried by said spacers, pinions engaging said racks, shafts for l5 said pinions, inter-meshing gears on said shafts, a reciprocating driver, and a connection between said driver and one of said intermeshing gears for imparting an oscillating motion to said pinions.

17. In mechanism of the class described,'a die 10 for the work, and means for moving work relative to the die, including a pair of opposed work-engaging jaws movable relative to each other to alternately grip and release the work, reciprocating side plates for said jaws, spacers for said plates above and below said jaws, means for reciprocating said plates including racks carried by said sp'acers, and oscillating pinions engaging said racks, said plates extending above and below the racks whereby the pinions hold the same against lateral displacement.-

18. In mechanism of the class described, the combination with a bed, of ways secured to said bed, and work straightening means carried by said bed and including a pair of slidable workengaging jaws,'a supporting frame for said jaws slidable in said ways and including a pair of spaced side plates and spacers between said plates; and actuating means for said jaws carried by said spacers.

19. lnlmechanism of the class described, the combination with a bed, of ways secured to said bed, and work straightening. means carried'by saidbed and including a pair of slidable workengaging' jaws, a supporting frame for said jaws slidable in said ways and'including a pair of spaced side plates and spacers between said plates, andmeans for limiting sliding {movement of the frame including adjustablemeans carried by said ways. 40

-20. In mechanism Qfl the class described, the combination with a bed, of ways secured to said bed, and work straightening means carried by said bed and including a pair of slidable workengaging jaws. a supporting frame for said jaws '45 slidable in said ways and including a pair of v spaced; side plates and spacers between said plates, and means for limiting sliding movement of the frame relative-to the bed including means carried by said ways and engageable with one of said plates.

21. In mechanism of the class described, a sizing die, means for moving workin a forward direction through the die, including a pair of opposed workengagingjaws movable relative. to each other. to alternately grip and release the work, said jaws having longitudinally extending inclined portions, reciprocating members having inclined portions substantially parallel to the inclined portions of said jaws, and anti-friction .means between and engaging said parallel portions, said jaws, reciprocating members and anti-friction means forming a one-way clutch operable to cause the jaws to grip the work when moving in aforward direction and to release the work-when moving in a rearward direction, and spring means bearing against the forward end of said jaws and yiieldably pressing said jaws-in a rearward direc- 22. In mechanism of the class described, a sizing die, and means for moving work through said.

portions. reciprocating side plates'upon the outer sides and free of said jaws, spacers for said plates adjacent the outer edges-of said Jaws. the inner edges of said spacers having longitudinally exsaid jaws to grip the work when moving in one direction and to release the work when moving of said laws, the elements aforesaid of said new ing means a one-way clutch for causing in thG'ODPOSite direction.

23. In mechanism of the class described, a sizing die, and means for moving work through said I die. including a pair of opposed work-engaging Jaws movable relative toeach other to alternately grip and release the work, reciprocating plates upon the outer sides and free of said jaws, spacers between said plates and disposed adjacent the outer edges of said laws, said spacers being fixed to said side plates. the outer edges of said spacers beingprovided with racks, the inner edges of said :spacers being provided with inclined surfaces; the outer edges of said Jaws being provided with inclined surfaces substantially parallel to the inclined surfaces of I said spacers. anti-friction means between and engaging said parallel surfaces, and spring means bearing against one end moving means including direction and to release it when moving in the the Jaws to grip the work when moving in one opposite direction, and actuating means for said pinions engaging said racks. ---V a 24. In a machine .of .the class described, a pair of opposed stock clamping jaws, a reciprocating head carrying the jaws and having wedge surfaces for ,moving the Jaws transversely of the head to clamped position against the stock, and a spring movable lengthwise of the head against one end of the jaws to hold the'latter wedged by said surfaces against the stock.

25. In mechanism of'the class described, a sizing die, and means for-moving work through said die, including a pair of opposed-work-engaging Jaws movable relative to each other to'alternately grip and release the work, said'jaws having longitudinally extending inclined portions; reciprocat-- 7 ing sideplates adjacent and free of said jaws,

spacers for said plates adjacent said jaws, said.

spacers having longitudinally extending inclined portions substantially parallel to the inclined portlons of said jaws, anti-friction means between and engaging the parallel inclined portions aforesaid. and springmeans bearing against one end of said jaws,'the elements aforesaid of said moving means forming a one-way clutch for causing said jaws to grip the work when moving in one .direction and to release the wrlciwhen moving intheoppositedirection. v v

Images