US1586627A - Forming machine - Google Patents

Description

June l 1926-. 1,586,627

l... A. KOMINSKY FORMING MACHINE Filed Nov. 26. 1923 4 Sheets-Sheet .l

June l i926.

L. A. KOMINSKY FORMING MACHINE Filed Nov. 26, 1923 4 Sheets-Sheet 2 0 O4 11 l w m Y uw@ y June l 1926. 1,586,627

L. A. KOMINSKY FORMING MACHINE 'l Filed Nov. 2e. 1923 4 sheets-snaai s June l1 1926. 1,586,627 l L. A. AKoMlNsKY FORMING MACHINE Filed Nov. 26. 1923 4 sheets-sheet 4 www @W digr.

Patented Juney l', 1926.

y n 1,586,627 miENT oFFIoE.

@f2-ifi# QF CHICAGO, IPPINOIS- i lfalliiiiw MACHINE- tho" bgg@ dig-ringdiefliending1015er@ ioni finyhe termed the primary forme` produc` 22 var-Imxg@d cross-WiSo oft-he machine: For

jdentificationithcse sliding forliiersli W] 5; .They we l-posi t1' on in' Fig-f l.v FIV-hoy" a'ife located on YmLzvioSiite.

gyp'c oai-iWork produced y y sov ing n'ieclmnisin are shown in detail in 8. Each former is longitudinally slotted to receive a block 8G. the upper end whereofl is in the form of a threaded stud 38 projecting above the top of the former and adapted to The formers 18 are similarly constructed and operated, having studs 38 and clamping nuts 40 and being reciprocated within their guides by means of .eccentrics rigidly secured to shaft 4. These eccentrics cooperate with a. short pitman 46 and a long pitman 48 in the same manner as above described.

The eccentrics secured to shaft 14 are so timed as to operate their respective formers simultaneously and in opposite directions, and the same istrue of the eccentrics which are secured to the shaft 4. The eccentrics on shaft 14 are so timed with respect to those on shaft 4 that they will move their formers forward after the primary formers 18 have been moved forward. Thus the formers all move in timed relation, the primary formers 18 first moving forward to make the initial bend and then the secondary formers 30 moving forward to make the nal bend.

The formers 18, 30 are all provided at their forward end with rollers 56 shown in detail in Fig. 6. These rollers make direct contact with the work 24 and at the bottom have a flange 58 which forms a support for the work during the bending operation. These rollers are journaled upon shouldered pins 60 secured to the formers near their forward end. As these rollers are rotatable they practically eliminate friction when acting upon the work. According` to the broader aspect the rollers and the sliding elements upon which they are mounted may be taken together as constituting the formers of the machine.

Located within the center of the group of formers are two stationary rollers 66 shown in detail in Fig. 6. They are also shown in F 4 and and it will be observed that they are so positioned as to Contact the work on opposite sides at a slight distance apart, depending upon the length of the central or body lportion of the S into which the work is to be formed. In practice the work is bent around them and hence they may be regarded as stationary forming dies or anvils. The diameter of these rollers determines the shape of the curve at the ends of the work. These stationary but rotatable dies may be mounted in any suitable manner. According to the present design they are mounted upon shouldered pins 68, the

upper ends of which are threaded as shown of nuts Fig. i'.

after it is finished. Ejectors in themselves are known and in the present case the construction may be varied, but as illustrated the bar is operated by a lever 7 8 shown in side elevation in Fig. 3. lt is fulcrumed upon a pin mounted in a standard 82. It is operated by a pitman 84, the lower end of which is pivoted to a lever 86. This lever is pivoted at its inner end to a stationary bracket 88 and is actuated at a point between its ends by a cam 90 rigidly mounted on shaft 4. The result is that every time the cam comes around it raises lever 86 and this motion is transmitted to ejector bar '(6 which descends at the proper time and pushes the finished article downward to make room for fresh section of the bar.

In this machine the insertion of the work trips or starts the machine, which then automatically cuts off the proper length of bar, bends the work to shape and then ejects the work and stops the machine. I will now describe the mechanism by which this is accomplished.

A. stationary guide 92 shown in plan in Fig. 1 is mounted in position on the table to guide the bar to a position between the stationary die rollers 66. In line with this guide at a point past the dies is a block 94 slidably mounted in a stationary clip 96. This block is fastened to a push rod 98 which is slidable in the upturned ends of a bracket 100. The push rod has on it a fixed collar 102 against which abuts a spring 104. The other end of the spring abut-s the far end of the bracket with the result that the push rod is constantly urged forward, that is, toward the operator and toward the incoming bar.

At the rear end the push rod is rigidly connected to a bell-crank lever 100, which is pivoted upon a stationary fulcrum 108, shown at the right end of Fig. 2. The opposite end of the bell-crank lever is connected to a rod 110, the lower end of which is connected to a trip lever 112, shown in detail in Figs. 9, 10 and 11. This trip lever is pivoted upon a. stationary fulcrum 114 and has a pointed end 116 capable of entering into a slot on the under side of clutch pin 118. This clutch pin is slidingly mounted in a collar 120 keyed to shaft 4. It is aisance? yn'iitted to the shaft.

The flywheel, which is loose on the shaft, is confined between thek clutch collar 120 anda collar 121 which is keyed to the shaft on the opposite side of the hub of the flywheel.

`In `order that the shaft will rstop promptly when the clutch pin has been withdrawn a friction brake 130`is provided which surrounds collar 120 and is furnished with a brakeV lining 132. The friction brake is formed in two parts pivoted together on the pin 134 as shown near the upper right corneryof Fig. 1. `A hand screw 136 engages the freeends of the brake parts for regulating the friction of the brake on the collar. This hand screw is also shown at the right .endof Fig. 2. As indicated this brake prevents overthrow and in practice is so regulatedas to bring the formers to rest in the normal position shown in Fig. 1 and in full lines in Figs. 4 and 5. v

In the operation of the clutch mechanism, when the incoming 'bar engages the block 94 at the forward end of the push rod 98 and.

pushes it backward, the pointed end of the trip lever 112 will descend and release the clutch pin 118. The spring' 122 will then press the pin towards the flywheel and when the socket 1,24 comes opposite the pin, the pin `will enter into it and transmit the rotation of the flywheel to the collar 120 and shaft 4. The machine then performs its function and ejects the finished work, after which the push bar 98 `returns to normal position, which causes the trip lever 112 to rise to the normal position shown in Fig. 10. Consequently when the clutch pin comes around again it moves into Contact with the pointed end of the trip lever, the oblique surface whereof cams the pin back out of engagement with the flywheel, thus disconnecting the shaft from the Hywheel. The friction brake 180 thereupon arrests the collar 120 and the main 4drive shaft 4. This,

restores all of the parts to normal position.

In this machine the bar is out off to proper length bymeans of a cutter 140, which isi'astened to the former-body 18 as best shown at the left of-Figs. 4 and 5. Asit `moves towards the right it cooperates with a stationary cutter 142, `.which-is in line with guide 92 and also in line with the cutter 140.

Operation: When the operator inserts a bar in the'machine he passes it along the guide 92 and betweenthe dies 66 until it contacts the tripping block 94 and pushes it Jin dotted lines ink Fig.

`former doing .y its share i duce a pi andpush rod V98 bach until 112 releasestheclutchpin 118 and thereby the trip leverk causes the lflywheel (which is the driving elev nient) to drive the main shaft u he primary formers 18 then move forward to the" position shownin dottedy lines in Fig.y 4. The flanges 58 of the rollers 56, which in a sense form part of the farmers, cometeneath the har and support it, the plate F2 at the samel time preventing the bar from ris-` ing. The rollers thereupon bend, the bar so that the ends assume the positions shown 4 and 1n full lines in Fig. 5. AThe cutter 140, which advances at this time, cuts oft' a portionof the bar preparatory to the bending operation.

. After the initial bending has been completed the supplemental formers 30 move forward lengthwise of they machine from the position shown in yfull lines in Fig. 5 to the position shown in dotted lines. `This produces the supplemental and .final bend'and brings the bar to the shape showny in dotted lines in Fig. 5.

When the work has thus been configurated the ejector 76 descends, the formers 18, 3() in the meantime moving back to original position and thus releasing the bar. The removal of thefinished work permits the tripping block 94 to return to initial position, which'throws ont the clutch in the manner previously explained and permits' t-he brakek 130 to bring the machine to astandstill with the formers in initial position.

The machine is then ready to have the operator insert a fresh length 'of bar and the action of the machine to be repeated.

From the foregoing it will be evidentthat lmy machine is entirely automatic in its operation except feeding the bar into the machine. The cutting, forming, starting, ejecting and stopping all follow as a result of the insertion of the bar into the machine. It will also bev noted that the forn'rers on the same side of the work more successively and at right angles to each other, each toward producing the final shape. Having thus descrilied my invention, what i clain'i new and desire yto secure by Letters Patent 1. ii. bar bending machine having stationary forming dies spaced apart in position to en; ige the work on opposite vsides and at dis .-.nt points, means .tor positioning the to more crosswise of the bar to `engage por-l tions immediately beyond the Ldi kto proary bend, and secondaryy formers les movable approximately lengthwise of the bar and crosswiseto the first mentioned formers, the secondary formers being adapted to the bent ends ofthe bar for producing an additional bend around the dies, and coordinating operating means for causing` lirst the primary tormers to advance and then the secondary tormers to advance.

A bar bending; machine having stationary dies, each having` a curved actinpsur- Ytacef a plnraiitv ot tolniers each having` a 'forming roller for engaging the bar, means tor guiding' said toi-mers in straight lines at an angle to each other and at an angle to the bar, and means 'tor iuftuatine said 'tormers sucer vely to cause the rollers to produce cuznu ative bending' etiieets upon the. bar.

3. )i bar bending machine having)- a stationary plate7 two rollers mounted thereon at a distance from each other so as to permit the work to pass between them and to Vensnie'e the work on opposite sides, means tor limiting the distance to which the work can be inserted and movable toriners located cn oppo, sides ot' the work and apted to move toward it to bend it around the rollers, the rollers having anges spaced from the plate 'tor holding' the work between the tiangges and the plate.

d. L `bar bending machine havingl two stationary dies eich having a curved acting surtace, a pair ol primary formels having? rollers or engaging the bar outside of the dies, a pair oit secondary toi-mers for engaging` the bar beyond the points engaged by the primary tormers. means tor guidingl the primary 'lormerain straiyht lines at an angle to the bar, means n t'orincrs in stra'e'ht lines at an angle to the lines ot movement ot the primary ormers, and means for advancingI iirst the primary 'tcrmers and then the secondary ormers to produce cumulative bends upon the bar.

5. A bar bending' machine having a pair ot forming dies located in position to engage the 1oar on opposite sides at non-adjacent points.q rollers adapted to engage the bar bevo-nd the die and slidable elements for advancing' said rollers approximately tangential to the dies tor bending the bar around thenr G. i bar bending machine having` guiding means 'tor the bar, stationary dies upon which the bai` may be formed, former-s for n r am 'for yfuidinl the secondary bending the bar around the dies, operating means `for the tormers7 means Jfor guiding the former in straight lines approximately at right angles to the bar, a power device, a clutch for connecting the power device to the operating means, and tripping mechanism operated by the worl; tor controlling 'the clutch.

l'. )i bar bending machine havinr a guide tor the bar` stationary forming dies, movable 'lormers tor bending the bar around the dies, operating means for the iormers, a power device, a clutch for connecting the power device to the operating means, wor-k controlled tripping mechanism :tor controlling; the clutch, and an ejector for the work, said ejector being operated by said operating means the ejector being timed to eject the work and thus cause the tripping` mechan :i to be restored preparatory to introducing a fresh piece ot work.

t?. n. bar bending machine having;1 two stationary dies spaced apart and each havingl a curved artinr surface, means tor supportinjej the bar in position to pass between the two itinmers, and project beyond them at each end, a pair et primary tormers for enine` the bar on opposite sides, outside oi the dies a pair ot secondary foriners for menging the bar beyond the points engaged b v the j'n'imary 'tormers and on opposite sides ot the bar, means tor guiding the primary 'lormers in straight lines at an angle to the bar, means tor guiding` the secondary tormers in straight lines at an angle to the lines of movement ot' the primary formers7 the lines of movement of the primary tormers being approximately parallel to each other, and the lines ot movement of the secondary toriners being approximately parallel to each other7 and means 'tor advancing` firstthe primary tormers simultaneously, and then the secondary tormers simultaneously to produce cumulative bends ot opposite curvature upon the bar.

In witness whereofA` l have hereunto subscribed my name.

LOUIS A. KOBHNSKY.

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