US1638403A

US1638403A - Shearing and forging press

Info

Publication number: US1638403A
Application number: US45203A
Authority: US
Inventors: Lucas John
Original assignee: Lewis Foundry & Machine Compan
Current assignee: Lewis Foundry & Machine Co; Lewis Foundry & Machine Compan
Priority date: 1925-07-22
Filing date: 1925-07-22
Publication date: 1927-08-09
Anticipated expiration: 1944-08-09

Description

927 J; LUCAS SHEARING AND FORGING PRESS 4sneets-s'heet1 Filed July 22. 1925 .Tofzh Lucas a y FIG. I

J. LUCAS SHBARING-AND FORGING PRESS Fil ed July 22; 1925 4 Sheets-Sheet 2 F|B.2 1- Lucas his aff v y 1 Aug 7 J. LUCAS SHEARING AND FORGING PRESS 4 Sheets-Sheet 3 Filed July 22, 1925 John Lucas Aug. 9', 1927. 1,638,403

J. LUCAS SHEARING AND FORGING PRESS Filed July 22, 1925 4 Sheets-Sheet 4 i I I U I I a 30% I: L. l r 4!} i 20 FIB-8 IINVENTUR T Lucas FIG. 7 I by I1. is 4 1 forvreq Patented Aug. 9, 1927.

UNITED'ST-ATES PATENT OFFICE.

JOHNLUCAS, F PITTSBURGH, PENNSYLVANIA, ASSIGNOB T0 LEWI$ FOUNDRY 8' MACHINE COMPANY, OF PITTSBURGH, PENNSYLVANIA, A CORPORATION OF PENN- SYLVANIA.

' SHEARING'AND FORGIN G PRESS.

Application filed July 22,. 1925'. Serial No. 45,203.

In order to form over-coats from abar of this sort, it is necessary that the bar be heated,

that it be sheared into blanks of suitable length, and that these lengths be subjected to the action of forming dies.

The object of the invention. is to provide a machine for both shearing blanks to proper length, and for, forging them into overcoats,

which. is so arranged that all the adjustments of the machine are simple, and that the mechanism for actuating the shears and knives of the machine is uniform and unfailing in its operation.

In the accompanylng drawings Figure 1 is a front elevation of the machine as a whole Figure 2 is a side elevation thereof; Figure 3 is a fragmentary vertical sectional view on the line 3-3 Figure 1 showing portions of the machine on an enlarged scale; Figure a is a fragmentary view, alsoon an enlarged scale, and partially in elevation and partially in vertical section, illustrating the action of the means for delivering blanks from the shearing knives of the machine tothe forming dies thereof; Figure 5 is a cross sectional View on the line 55 Figure l; Figure 6 is a cross: sectional view on the line- 66-Figure lyFigu-re 7 is across sectional view on the line 7-'Z Figure 4; and Figure 8 is a fragmentary vertical section showing the means for delivering blanks to the formingdies gripping a blank. 7

The frame of the machine comprises abase l to which is secured a housing 2. On a. bracket 3 constituting part of the housing 2 is a driving motor 4. This motor 4 transmits movementof rotation to the main shaft 5 of the machine by means of a pinion 6 on an extension 7 of the motor shaft and mesh-..

ing with a gear 8. The gear 8 is carried by a cross shaft 9, which has thereon a pinion 1O meshing with a driving gear 11 on the main shaft 5. r

overcoat.

cross head. 14- is slidable on ways 15 in the housing 2 of the machine, and is reciprocated in a. vertical path of travel by the rotation of the main shaft 5.. The forward portion of the cross head 14 is formed as a chuck 16 having a. shearing knife 17 secured therein, as by means of plate 18 and bolts 16. A set screw 19, having a threaded engagement in a lug 20 on the-head, serves as an adjustable backing for the shearing knife l'Z.

On the rearward portion of the cross head 1% is a chuck 21 in which the upper or male forming die is secured by means of bolts 22.

On the upper portion of the base 1 isa channel. formed by lugs or ridgesv 23 in which the lower shearing knife 24 is secured by bolts 25. The operating face of the lower knife 24l is provided with a saucer shaped channel 26 conforming the cross sectional shape of the stock to be sheared and forged into overcoats.

In use of the machine a heated bar of the proper shape is passed along the channel 26 until its forward extremity comes in contact with the arm 27 of an L shaped stop 27, which is bolted to one of the ridges. 23,. and projects into the path of the stock. The for-- ward face of the arm 2'? of stop 27 is disposed beyond the edge or face 2:46 of the knife 24 a distance equal to the desired length of the blank to be pressed into an On the first downwardly movement of the cross head. ll in starting themachine, the forming die 22 performs no function, as no blank is presented for forming. 9n eachsubsequent downward movement of the cross head the forming dies of the machine act on the tank which has been sheared by the immediately previous downward movement. Special means are provided for delivering each sheared blank to the forming dies, and the lower, or female, forming die is so arranged as to receive such blank.

For this purpose the lower, or female, forming die 28 is secured to the base 1 to the rear of the edge 24 of the knife 2d and is disposed at a lower level than the channel 26 in such knife.

The means for delivering a sheared blank to the forming dies comprise tongs, which are indicated generally by the reference numeral 29. The lower jaw of the tongs is slidable in a channel in the base 1, and is held in position by means of cover plates or guides 31 bolted to the base. The upper jaw 32 of the tongs has a pivoted connection 33 with the sliding jaw 30 at a point to the rear of the transverse central line of such jaw. A coiled compression spring 34; mounted between said jaws to the rear of their pivoted connection 33, tends to prevent mutual separation of the forward er: tremity of the jaw.

Reciprocation of the tongs is secured by the connection of the sidable jaw 30, through toggle 35, with an operating arm 36. Arm 36 is mounted adjacent its upper extremity on a shaft 37, to oscillate with respect thereto. Secured to arm 36 and to the housing 2 is a tension spring 38 for drawing the lever arm rearwardly of the machine. On cross head 14- is a rearwardly projecting arm 39, which is arranged to contact an adjustable bolt l0 in a forward extension 36 of the arm 36.

The operation of the machine is as follows: A bar of the stock is continuously pressed into the machine and against the arm 2? of stop 27. On the first downward movement of the cross head 14 the upper shearing knife 17 cooperating with the face 2 lof lower knife 2 L, shears a blank from the stock. In the upward movement of cross head let, the arm 39 thereof strikes the adjustable bolt 40 in the portion 36- of arm 36 and forces the lower portion of the arm forwardly against the resistance of the coiled spring 38.

Arm 36 in swinging forwardly produces a forward sliding movement of the j aw 30 of the tongs 29. As the tongs finish their forward movement, and as the cross head 14 approaches the upper limit of its movement, the tongs come in contact with a sheared blank A which has dropped to a receiving plate 41. As the jaws come in contact with the end of the blank A, continued movement of the tongs forces the jaws over the blank against the resistance of the coiled spring 34;.

At the beginning of the downward movement at the cross head 14 tension spring 38 draws the arm 36 and tongs 29 sharply to the rear. During this movea'ient, the blank A is released from the tongs by coming into contact with the guides or cover plates 31 of the tongs, and lies in the lower forming die 28.

The continued downward movement of the cross head both forms an overcoat from the blank A lying in the lower or female die 28 and also shears another blank from the stock.

It should be noted that the cross head, which carries the upper shearing knife and male die, has a fixed mounting for perpendicular movement along a straight line, and that it is at all times in alignment with the lower shearing knife and female forming die. There is thus no possibility of variation in the points at which the tools carried by the cross head strike. No relative horizontal adjustment of the cross head on the stationary knife and die is necessary.

Forward movement of the tongs for supplying a sheared blank to the forming dies is regulated by means of the adjusting screw 4-0 in the operating arm 36. A simple adjustment of this screw thus assures the proper engagement of a sheared blank by the tongs during the continuance of the upward movement of the cross head.

It should be noted that during each recip-- rocation of the cross head, a single blank is sheared from the stock and a single overcoat pressed, thus giving a completed overcoat for each reciprocation of the cross head.

The machine as a whole is simple and sturdy, and the parts are so arranged that all are readily accessible for adjustment or replacement.

What I claim is:

1. In a shearing and forging press the combination of shearing knives and forming dies, and automatically operated tongs for feeding blanks sheared by the knives to the forming dies, said tongs comprising'a slidable jaw and a second jaw pivotally mounted thereon, and yielding means for resisting movement of said pivoted jaw relative to said sliding jaw.

2. 1n a shearing and forging press the combination of cooperating pairs of shearing knives and forming dies, tongs for feeding blanks sheared by said knives to the forming dies; said tongs comprising a slidable jaw, asecond jaw pivotally mounted thereon, and yielding means for resisting movement of said pivoted jaw relative to said sliding.

jaw; movable means carrying the upper forming die and shearing knife of each pair, and means whereby the sliding jaw of said tongs is reciprocated by movement of the die and knife carrying means.

3. In a shearing and forging press the combination of shearing knives and forming dies, means for positioning a blank severed by the shearing knives, and automatically operated tongs arranged to pass the endof a sheared and positioned blank and to grasp the same partway of its length for feeding the same to the forming dies. i

4. 1n a shearing and forging press the combination of shearing knives and forming dies, means for positioning a blank severed by the shearing knives, and automatically operated tongs arranged to pass the end of a sheared and positioned blank and to gras the same partway of its length for feeding the same to the forming dies; said tongs comprising a slidable jaw and a second jaw ivotally mounted tHereon,- and yielding means for resisting movement of said piv oted jaw relative to said slidable jaw.

5. In a shearing and forging press the combination of shearing knives andforming dies, means for positioning a blank severed by the shearing knives, automatically operated tongs arranged to pass the end of a sheared and positioned blank and to grasp the same partway of its length for feeding the same to the forming dies, and means arranged to contact the blank held by said tongs for discharging it therefrom.

6. In a shearing and forging press the combination of shearing knives and forming dies, means for positioning a blank severed by the shearing knives, automatically operated tongs arranged to pass the endof a sheared and positioned blank and to grasp the same partway of its length for feeding the same to the forming dies, and means arranged to contact the blank held by said tongs for discharging it therefrom; said tongs comprising a slidablej aw and a second jaw pivotally mounted thereon, and yielding means for resisting movement of said pivoted jaw relative to said slidable jaw.

7. In a shearing and forging ress the combination of cooperating pairs shearing knives and forming dies, tongs for feeding blanks sheared by said knives to the forming dies, means arranged to project into the path of movement of the tongs for contact ing a blank held thereby and discharging it therefrom; said tongs comprising a slidable jaw, a second jaw pivotally mounted thereon and yielding means for resisting move mentof said pivoted jaw relative to said sliding jaw; movable means carrying the upper forming die and shearing knife of each pair, and means whereby the sliding jaw of said tongs is reci rocated by movement of the die and kni e carrying means.

In witness whereof, I hereunto set my hand.

JOHN LUCAS.