US1865304A - Apparatus for reducing metal stock - Google Patents

Description

June 28, 1932. 5, 5 1,865,304

APPARATUS FOR REDUCING METAL STOCK Filed July 2, 1950 4 Sheets-Sheet 1 ENVENTOR w'ge 3. (be

BY ,6??? wu mm ATTO R N EYS June 28, 1932. G. B. COE 1,865,304

APPARATUS FOR REDUCING METAL STOCK Filed July 2, 1930 4 Sheets-Sheet 2 im J30 INVENTOR 62mg? 25. (as

ATTORNEYS June 28, 1932. B cog 1,865,304

APPARATUS FOR REDUCING METAL STOCK Filed July 2, 1950 4 Sheets-$heet 3 fi'. 7% Z W3 75 106' INVENTOR 590/92? 3. (be

ATTORNEYS June 28, 1932. G. B. COE

APPARATUS FOR REDUCING METAL STOCK Filed July 2, 1950 4 Sheets-Sheet 4 INVENTOR 62 0496 -3. (be M, 6MZ. /l mm ATTORNEYS Patented June 28, 1932 UNITED STATES PATENT OFFICE- GEORGE B. COE, OF WATERB URY, CONNECTICUT, ASSIGNOR, BY MESNE ASSIGNMENTS, T TUBE REDUCING CORPORATION, OF WILMINGTON, DELAWARE, A CORPORATION OF DELAWARE APPARATUS FOR REDUCING METAL STOCK Application filed July 2, 1930. Serial No. 465,364.

This invention relates to apparatus for reducing metal stock and in particular to. ap paratus for reducing the cross-sectional area of tubular stock by working it in successive Ll' increments toward the starting end of the stock.

The object of the invention isto provide improvements in this art. The nature and objects of the invention may best be under- .1 stood from the disclosure of a selected embodiment of the invention given by way of illustration. This will now be described with reference to the accompanying drawings in which:

Fig. 1 is a top plan view of apparatus embodying the present invention;

Fig. 2 is a side elevation;

Fig. 3 is a central vertical section on the line 33 of Fig. 1;

Fig. 4 is a transverse vertical section on the line 4'4 of Fig. 1;

Fig. 5 is a transverse vertical section on the line 55 of Fig. 1;

Fig. 6 is a transverse vertical section on 25 the line 6-6 of Fig. 1;

Fig. 7 is a horizontal section on the llne 7-7 of Fig. 2; and

Fig. 8 is a vertical section of a detail along the line 88 of Fig. 7. The apparatus is of the type which reduces stock in successive relatively short increments worked down toward the starting end of the stock. The tools for working upon the stock may be referred to as swages because they act repeatedly and successively to reduce the stock. There are several known types of such tools or swages, all of which are substantially equivalent to gapped eccentric rolls. The present apparatus employs (Fig. 7) oscillating rockers 10 journaled in a reciprocating frame or saddle 11 slidably mounted on a base frame 12. The saddle is reciprooated by a connecting rod 13 actuated by a crank shaft 14. The shaft is driven by any suitable motive means. It is counter balanced by a weight, 15. The rockers are constrained to have substantially a rolling movement along their adjacent edges. that is, their working faces are held by suitable means (not stock, and permits tubes to be fed into the machine over the rear end of the mandrel so as to travel to the reducing devices in endto-end relationship continuously. This tail stock mechanism is not illustrated herein but a portion of the drive mechanism for the mandrel turning device is illustrated.

,Referring to Fig. 1, the mandrel turning drive mechanism comprises a gear 20 on the main crank shaft 14, driving a gear 21 on a stub shaft 22, the gear 21 in turn (Fig. 6) driving a gear 23 on a lay shaft 24. The lay shaft (Fig. 6) is mounted at one end in the base frame of the machine and at its outer end in a bearing in a depending bracket 25.

The lay shaft 24 also (Fig. 7) carries an eccentric or elliptical gear 26 driving a similar gear 27 on a transverse shaft '28. This shaft 28 atits inner end carries a bevel gear 29 meshing with a bevel gear 30 on a Geneva arm shaft 31. The shaft 31 (Fig. 3) carries a Geneva arm 32 with a roller 33 and also a holding cam 34 for engaging notches in the Geneva disc 35 between turning movements.

The Geneva disc 35 is mounted on a tubular shaft 36 and is provided with slots 37 cooperating with the roller 33 of the arm 32 y and with arcuate notches 38 cooperating with 90 the holding cam 34. There are enough slots on the Geneva disc to provide smooth action of the parts. Herein six slots are used.

The shaft 36 is made tubular because it is located on the axis of travel of the stock and must permit the stock to pass therethrough. The bore of the shaft is made large enough to pass the largest stock the machine will handle.

At its front end the tubular shaft 36 carries 100 a gear 39 meshing with a gear 40 rotatably mounted upon a stock turning shaft 41. Cooperating with the gear 40 is a clutch sleeve 42 slidably keyed on the shaft 41. The sleeve "shift arm 45 fast to a vertical shaft 46. The

shaft 46 is mounted in a bearing bracket 47. At its upperend it is provided with a rigid arm 48 connected at its outer end by a pivot pin 49 to an adjustable actuating link 50.

- The link is attached to a shift handle 51 journaled upon a stud shaft 52 borne by the upstanding bracket 53.

The turning mechanism will operate and alternately rest because of the Geneva gear. It has only a short time to operate because it must operate at the end of the rocker stroke between the time the rockers release the stock "when approaching the end of their stroke and along the mandrel.

The feeding mechanism is of the type which engages the stock intermittently to feed it to the reducing device. Inasmuch as it is desired that the stock move forward without interruption and without dismantling the machine, the feeding mechanism is referably of the type which is capable of ceding stock continuously one length after the other to the reducing device.

Herein (Fig. 7) the feeding mechanism comprises gripper jaws 60 for directly engaging the outer longitudinal surface of the stock. These jaws (see also Fig. 5) are mounted in tapered guideways 61 formed in aTreeiprocatory feed frame 62 slidable along guide supports 63. The frame is retained upon the guide supports 63 by plates 64 held by cap bolts 65. The guide supports 63 are formed on the fixed feed mechanism supportin frame previously mentioned, the same being secured to the base frame 12 by cap bolts 66.

The jaws are interiorly roughened to engage and hold the stock. They are urged to move forward b coil springs 67 engaging their rear ends. he sprmgs at one end are seated in sockets 68 formed in the ends of the jaws and at their other ends engage annular steps formed on adjusting screws 69. The adjusting screws are threaded through an extension 70 formed on the reciproeable feed frame 62. The extension 70 has an aperture therethrough between the adjusting screws 69 to accommodate the stock.

Means are herein provided for causing the jaws to grip the stock and subsequently causing the feed frame to move forward with the jaws to feed the stock. It is preferable that the gripper actuating mechanism be some what resilient and act more or less independently of the forward-feeding mechanism, the latter being substantially positive in its operation.

The clamping and feeding operations are herein both accomplished through the same actuating device. Referring to Figs. 5 and 7 it is found that bell-crank feed-and-clamp levers 72 are mounted upon journals 73 secured in the reciprocating frame 62. Bushings 74 are disposed between the journals 73 and the levers 72. The journals may be retained in the frame 62 by nuts 75. The entire assembly of movable parts may be retained within the frame 62 by a cover plate 76 held by cap bolts 77. In Fig. 7 the rear arms of levers 72 are shown in dot and dash lines for the sake of making the sectional view more bolts 80. The other ends of the links 78 are *1 similarly retained by plates 81 and bolts 82 within sockets formed in the adjacent ends of rock levers 83. The rock levers 83 are pivoted upon journals 84 secured in the fixed feed frame 55. The upper ends of the journals 84 are held in spaced relation by a crossbar 85. The cross-bar and the rock arms are retained upon the journals 84 by nuts 86.

The outer ends of the rock levers 83 are provided with sockets to retain the round ends of plunger push links 87, the parts being held together by plates 88 and bolts 89 as before. The front ends of the links 87 are rounded and fit within sockets formed in the rear ends of main plungers 90. The connection is maintained as before by plates 91 and bolts 92.

The main plungers are slidable within barrels 93 attached to the fixed feed frame 55 by cap bolts 94. At the front ends the plungers 90 are provided with caps 95 screwed thereon. These caps have a central bore and are hardened on the annular surface on the end which is exposed.

Within bores 96 formed in the main plung-.

at their rear ends in counter-bores 98 and at their front ends are i ,uided in the bores formed in the'caps 95. prings 99 encircling plungers 97 and acting against heads 100 formed thereonconstantly tend to move the clam plungers 97 out of the main plungers 90. he heads'100 in cooperation with the caps 95 retain the main plungers 90.

which are exposed are threaded to receive nuts 102. The nuts 102 secure between them the cross-bar 103 which is slipped loosely upon the extensions 101.

The outer ends of the extensions 101 are hardened to withstand the constant striking action of associated arts. These ends are struck by portions 0 the saddle 11 when it approaches the rear end of its stroke. This acts first to push the clamp plungers 97 rearwardly against spring 99 to push the main plungers rearwardly and through the related parts to cause the aws to close upon the stock. The jaws close by rearward movement and as is obvious the clamping action is resilient because the motion is transmitted through the springs 99. After the clamping action has been completed the rear nuts 102 bring up against the hardened annular flange of the cap 95 and force the main plunger further toward the rear, which causes the levers 72 and their journals to move forward bodily, carrying with them the feed frame,

feed jaws and the stock. This secondary action is accomplished without thev interposition of springs and is therefore positive in its nature.

Means are provided for assisting the turning movement of the bell-crank clamp-andfeed levers 72 to cause the jaws to clamp the stock. The cross-bar 103 comprises a part of these means. As shown in Fig. 1 the bar 103 at its central portion is provided with a push pin 105 upon which is loosely mounted a long coil spring 106. At the front end the spring engages a collar 107 formed on. the

push pin 105 and at its rear end engages a collar 108 attached by connecting pins 109 to toggle arms 110 mounted on the bolts 80. The push rod and spring are guided by spaced apertured brackets 112 held by 'cap bolts 113. The rear end of the push rod 105 has a head 114 which prevents the parts moving too far forward under the action of.

the spring. The spring is compressed when the feed moved rearward. This moves the collar 108 rearward also tending to straighten the'toggle links and spread the rear arms of the bell-crank levers 72 apart. When the action of the saddle on the plungers has ceased 103 to befreturn'ed to its forward position. "a Means-are provided forreturnmg the re- "ci-procating'.' feed frame 62 'to its rearward position. As shown in Fig. 8 this is accomplished by return plungers 116 mounted within 'bor'es117 formed on each side of the frame 62. The plungers 116 are provided I with stems 118 extending outward through lungers 97 within the he plungers 97 extend through the caps 95 and the extensions 10'1- openingsformed in small counterbores of the bores 117. Springs 119 disposed in the bores 117 and'a'ctingbetween the bases of the bores and the rear'ends' of the plungers 116 tend to force ,thefplungers out of their bores. The plun ers at their front ends enga e fixed upstan ing abutments 120. The p ungers are retainedwithin the bores by nuts 121 thread ed on the stems 118. The nuts may be tightened in different positions to adjust the length of movement of the plungers 116. It will be seen that this mechanism constantly urges the feed frame 62 rearwardly. 1

The feed frame 62 is limited in its rearward movement by stop pins 122 screwed into the rearend of the frame. The ends of the stop ins 122 are hardened and, as shown in Fig. are adapted to engage abutments 123 when the frame moves rearwardly.

Means are provided for holding the feed frame for a time after it has been moved forward. When so held, the jaws will be kept the sprmg expands again causing the bar I firmly clamped upon the stock due to their 1 levers about their pivots and clamp the jaws.

for thef plungers comprises removable side Thenuts 102' are so adjusted that the spring action is not completed before the clamping occurs. Adjustment of the nuts 102 also regulates the amountof stock feed. There is a short period after clamping and before feeding in which the movement of the saddle is taken up in the inter osed springs. Thereafter the feeding ta es place through the action of the saddle upon the main plungers whichcause the bell crank levers to move forward bodily carrying their journals, the feed frame in which the journals are mounted, the jaws and the stock. The matter of holding the stock forward after feeding assists the action of the rockers upon the stock, especially when, starting to work on a new length of stock.

The holding means herein illustrated comprise (Figs. 1 and 3) hooks 125 secured to the 'feed franiefby cap bolts 126. The hooks dfl ltchl 127.hi ing mechanism acts by the bar 103ybe1ng engage p ungers w ch are slidablyniounted in guides 128 formed on a J cross member 129. One side of the openings walls' 130lheld by cap bolts 131. The cross member129isjretained by cap bolts 132 passing through slotted holes 133 in the member which by this mounting is Permitted longi tudinal sliding movement or adjusting 1ts position.

The cross member 129 is adjusted by a set screw 134 provided with a head 134a held within -a recess of member 129 by a retaining plate 135. The set screw is threaded through an upstanding bracket 136 (see also Fig. 4) held to a fixed part by cap bolts 137.

. Normally the latch plungers 127 are urged upward into engaging position (Fig. 4) by coil springs 127a.

Means are rovided for actuatin the latch plungers. e guide members 1 8 for the lungers 127 are rovided with vertical slots in the side thereo for movement of stud pins 138 secured to the plungers. Links 139 are pivoted at one end to the pins 138 and at the other end to pivot pins 140 to connect them to arms 141 fast on a latch release shaft 142.

At its outer end the shaft 142 (Fi 2) is provided with an arm 143 pivoted y pin 144 to a link 145. The link 145 at its other end is pivoted by pin 146 to a cam lever 147 mounted on ajournal 148. The journal is carried by a bracket 149 secured to a fixed part by cap bolts 150. At its outer end the cam lever 147 carries a cam follower roller 151,c0operating with a cam 152 secured to the main crank shaft 14.

The links 145 provide for moving the latch lungeis in an position of the cross memr on which t ey are carried. The operation of the holding mechanism will 'be obvious. Usually turning of the stock occurs when the saddle is at the'front end of its stroke so the cam 152 is set to release the stock from the feeding mechanism before the turning action is begun.

In operation the saddle 11 as it approaches the rear end of its stroke comes against the ends of the clamp plungers 97. This moves the plungers rearwardly and they first act through the interposed plunger springs 99 and the described linkage to move the jaws 60 rearwardl in their inclined guides against the light springs 68 to clamp the stock. Further rearward movement of the plungers 97 brings them solidly against the end of the barrels 93 to eliminate the action of the rings 99 and through the same linkage as t at by which clamping was effected to move the feed frame 62 forward. This is possible because the pivots 73 for the jaw clamping levers 72 are borne by the frame. In this movement the return spring 106 is compressed between the bar 103 and the toggle arms 110.

When the feed frame is moved forward to feed the stock it is caught by the latches 127 and is held forward, and although the saddle 11 withdraws on the return movement thereof from the plungers the jaws will be the clamp and feed linkage will be held in the same position as they occupied when operated by the plungers 90. This will hold the stock fast until the rockers have had an opportunityto begin reducing it sufiiciently so that when the stock is released it will not move.

.14 acts upon the cam roller 151 on the lever 147 and through the linkage described releases the latches 127. The spring 106 then expands to force the cross bar 103 and associated plungers 97 forward and by mutual interaction to force the tog le levers 110 and associated parts rearward y to release the jaws and move the feed frame rearwardly.

One embodiment of the invention has been described in detail for purposes of illustration. It is to be understood, however, that modifications are permitted within the scope of the subjoined claims.

What I claim is 1. In apparatus for reducing stock progressively in relatively short increments of length, comprising in combination, gripping jaws, rearwardly convergent guides along which said jaws slide, a feed frame in which said jaws are mounted, said frame moving in an opposite direction to feed from the direction in which said. jaws slide to clamp the stock, a bell crank lever journaled on said feed frame, a main plunger connected by linkage to said lever, an auxiliary plunger mounted in said main plunger and a spring tending to cause relative movement therebe- After a short time the cam 152'on the shaft tween, means striking the end of said auxiliary plunger to cause said lever first to clamp said aws through resilient spring action and subsequently to cause said feed frame to move to feed the stock, and means-to restore said parts to initial positions.

2. In apparatus for reducing stock pro gressively in relatively short increments of length comprising in combination, grip ing jaws, rearwardly convergent guides a ong which said jaws slide, a slidable feed frame in which said jaws are mounted, a bell crank lever journaled in said frame, one end of said lever engaging the end of a jaw to move it endwise to clamp the stock when said lever is rotated about its axis, and said lever moving forward bodily with its pivot and the feed frame to feed the stock, resilient means for clamping and POSltiVG means for feeding, both means acting through said lever.

3. In apparatus for reducing stock progressively in relatively short increments of length, comprising in combination, clamping jaws mounted in a slidable feed frame, clampfeed members acting to clamp said jaws and subsequently to slidesaid frame, and means for actuating said members including interposed resilient devices, the resilient devices not being sufliciently strong to producefeeding action but acting throughout the time of clamping and for a short period thereafter.

4. In apparatus for reducing stock in successive relatively short increments of length, comprising in combination, a slidable feed frame, feed jaws slidably mounted therein, clamp-feed levers mounted on said frame for clamping said jaws and subsequently sliding said frame, and coordinating plungers acted upon successively by a striking device for operating said levers.

5. Apparatus of the character described comprising in combination, a fixed frame, a feed frame slidably mounted therein, jaws slidably mounted in said frame, clamp feed levers journaled on the feed frame, a set of two plungers successively acted upon by a striker and both movable in one direction to rotate said levers and translate them in the direction opposite to said plunger movement, and means for assisting the rotation of said levers for clamping, said means comprising a cross .bar connected to said plungers, a spring plunger connected at one end to said cross bar, a spring thereon, a collar at the other end of the spring through which said spring plunger is slidable, members connected to said collar and said levers to spread their ends apart and a head on said spring plunger to limit its movement in the reverse direction.

6. Apparatus of the character described comprising in combination a feed frame slidable forward to feed, rotatable means mounted thereon, rock levers and rearwardly moving plungers to operate said levers to rotate them and subsequently slide them together with the feed frame, means acting on said levers to assist in rotating them and thereafter tending to restore the levers and plungers to original position, and means for restoring said feed frame to original position. 7. Apparatus of the character described comprising in combination, a feed frame slidable forward to feed, rotatable meansmounted thereon, rock levers and rearwardly movmg plungers to operate said levers to rotate them and subsequently slide them together with the feed frame, and means acting mutu- [ally on said levers and plungers to restore them to original position. 1 :'8. Apparatus of the character described comprisingin combination, a slidable feed frame, .feed jaws therein which are kept clamped when said frame is held in a forward position, latches to hold said frame forward, a member supporting said latches, and {)neeans for adjusting the position-of said mem- 9. Apparatusof the character described comprising in combination, a slidable feed frame, a latch to hold'said frame in a position to which it has been moved, means for adjusting the axial location of said latch, and latch actuating means operative thereon in all adjusted locations thereof.

10. Apparatus of the character described comprising in combination, a slidable feed frame, a latch to hold said frame in a position to which it has been moved, means for adjusting the axial location of said latch, and latch actuating means operative thereon Hi all adjusted locations thereof, said means comprising a rotatable cam and linkages for transmitting motion of the cam to said latch.

11. Apparatus of the character described comprising in combination, a slidable feed frame, means for moving said frame in one direction and means for returning said frame, said returning means comprising a plunger mounted in said frame, a spring urging said plunger therefrom, an abutment against which the exposed end of said plunger contacts, a stem on said plunger extending through said frame and means adjustable on said stem for adjusting the length of movement of said plunger.

12. Apparatus as set forth in claim 11 in which an abutment and stop is provided to limit the return movement of said feed frame.

18. In apparatus for reducing stock comprising in combination, intermittently operating reducing devices, means for feeding the stock relative to said reducing devices, a hollow shaft forming part of a drive train for operating a part of said apparatus, the opening through said shaft being continuous and of a size to pass said stock, and means to rotate said shaft.

14. Apparatus for reducing stock in successive relatively short increments of length, comprising in combination a reciprocable frame for operating stock reducing devices, devices for intermittently gripping the stock in timed relation with the operation of said frame, and means including a striker and a resiliently pressed plunger for actuating said stock gripping devices to grip and feed the stock, the actuating means for said gripping June, 1930.

GEORGE B. COE.

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