US627033A - Attachment for metal-punching machines - Google Patents

Description

.No. 627,033. Patented lune l3, I899.

L. WILLIAMS.

ATTACHMENT FOR METAL PUNCHING MACHINES.

(Application filed Max. 17, 1899.)

(No Model.)

WI TNESSES INVENTOR Attorney f sagomugimns co. PHOTO-LITNQ, wnsnmomu. a. c.

machine A thereis a bracket 1.

LEWVIS WVILLIAMS, OF JOHNSTOWN, PENNSYLVANIA.-

ATTACHMENT FOR METAL-PUNCHING MACHINES.

SPECIFICATION forming part of Letters Patent no. 627,033, dated June 13, 1899.

Application filed March 17,1899.

To all whom it may concern:

Be it known that I, LEWIS lVILLIAMs, a citizen of the United States, residing at Johnstown, in the county of Oambria and State of Pennsylvania, have invented certain new and useful Improvements in Attachments for Metal-Punching Machines, of which the following is a specification, reference being had therein to the accompanying drawings.

This invention relates to machines for punching metals.

The object of the invention is to produce an attachment for connection to a punchingmachine, punching-press, or like machine, which attachment supports the punching-tool and permits the movement of such tool to different positions under the press or plunger, whereby a plate or other object to be punched may have a number of holes punched therein, if desirable, without necessity for the movement of the plate itself-that is, the tool is moved to the work instead of the Work moving to the tool, as is the usual practice.

Figure 1 is a plan or diagram indicating a punching press or machine of any usual construction and indicating in full lines and dot ted lines the positions which may be reached by the punch under the plunger. Fig. 2 is a partial side elevation and partial section of the attachment, parts of the punching-machine being indicated in dotted lines. Fig. 3 is a sectional detail of a modified punch and feeler, the punch being in two parts M M connected by a screw-threaded joint.

A indicates a punching machine or press of any usual construction and provided with a vertically-reciprocating plunger B, which is under control of the operator and is caused to move by a lever or treadle operating a suitable motive power. The plunger B has a plane lower face and does not directly carry. the punching-tool.

C denotes the machine bed or anvil, having aplane' face, as usual, and being parallel with the plane face of plunger B.

Connected to some part of the frame of the A yoke D is pivoted to the bracket 1 by a pintle 2 or otherwise. This yoke, as shown, has integral top and bottom bars and connecting-standards, such being a convenient, but not an es- Serial No. 709,486. (No model.)

sential, construction. The joint between the yoke and bracket may have antifriction-balls 3 to insure an easy movement about the pivot 2.

To the outer or swinging end of yoke D a second yoke D is pivoted by a pintle 5 or other suitable connection. This yoke D, as shown, has top and bottom bars or arms connected by an integral vertical standard, and the joint between the two yokes may be a ball-joint 6. WVhen thus constructed and connected, the yoke D may swing in a plane about pintle 2 and the yoke D may swing in the same plane about pintle 6 while partaking of the movement of the first yoke. The outer end of yoke D therefore has a wide range of movement in a plane parallel with the face of the plunger 13 and the anvil O and may be moved to anyposition between the plunger and the anvil. The upper and lower arms of yoke D are preferably in line at their outer ends, so that the punch and die will be in alinement with each other.

The lower arm or bar of yoke D carries a seat 8, having a passage 7 therein and a recess for the reception of the die F, correspond ing to the punch to be used. The die F is held in its seat by set-screw 9 or by other suitable means and can be changed on occasion. The disks cut from the work by the punch escape through passage 7 I The upper arm of yoke D has a vertical recess to receive the punch-holder L, to which holder the punch E is connected by a screwcollar J or in other suitable manner.

The holder L has a shoulder 10 near its upper end. A strongspiral spring K surrounds the holder in recess in the yoke D and tends to I lift the holder and punch. The collar J limits this movement by its engagement with the arm of the yoke.

The punch E has a transverse slot and a vertical perforation and may be in one or more parts. (See Fig. 3.) A sleeve P surrounds the body of the punch, being held thereto by a pin 11 passing through the slot. This sleeveis a hand-grasp for the operator, and by taking holdof this sleeve the punch may be swung anywhere within its limit of movement, and as the die F on the lower arm of the yoke partakes of the movement the punch a se /goes and die are necessarily in alinement and the punch is in position to be driven down by the plunger.

The vertical recess in the punch contains.

pushes its head up against the pin 11, thus lifting the sleeve or handle P.

A stripper or presser foot H is connected to the outer end of the yoke D by bolts or:

otherwise.

The plate G or other article to be punched is supported on rolls 12 or other convenient supports, so that the body of the plate extends between the bed or anvil O and the follower B. Preferably the rolls or supports 12 will hold the plate so far above bed 0 that the die F may be easily swungbetween the bed and plate, and the punch will then swing above the plate. The punch and die will preferably be relatively so adjusted that there is not much more than room for the work between the punch and die.

The plate G will be marked, preferably, by a prick-punch in the various places which are to be punched by the machine, and when placed on supports 12 the punch is swung under follower E. The operator, pressing down on sleeve 1?, projects the feeler I until it enters one of the pricks in the plate. Then by his foot or other hand he throws plunger B into operation. This plunger falls on holder L and drives down the punch through the plate, the disk or fillet dropping through the hole or opening 7. As soon as the downward pressure of the hand on sleeve P is released the feeler risesundr the impulse of spring M. As soon as plunger 13 rises the-spring K lifts the punch and its holder, the stripper I-I holding down the work.

Much of the work for which'this machine is specially useful is in punching holes in boiler or similar plates. These'plates may be supported a little above the die and will'yield by their own elasticity when'the punch falls,

so as to be seated firmly on the die; but rolls or supports 12 might be elastically supported, if desirable.

Yoke D might be slightly elastic, so as to support the die-seat far enough above the bed Cfto permit easy movement. The action of the plunger B will seat all the parts firmly when the plunger falls.

shifted from point to point between plunger B and bed 0, there is considerable advantage in economy and accuracy of work over the usual method of shifting the plate to the punch,-which reciprocates always inthe same line.

Asa punch supported in this manner can be very quickly Modifications within the scope of my claims are contemplated.

What I claim isv 1. An attachment for a punching-machine provided with fiat anvil and reciprocating flat-faced plunger, said attachment consist ing of a yoke pivoted to swing in the plane of the anvil and plunger and having parallel arms, a recessed die carried by one arm of the yoke and a punch carried by the other arm of the yoke, and a handle by which the yoke may be swung so as to carry the punch and die to the work between the plunger and anvil, substantially as described.

2. In anattachment for punching=machines, a swinging yoke pivoted to the frame of the machine, a second twoarmed yoke pivoted to the outer end of the first and swinging in the plane of the machine plunger and bed, a die carried by one arm of the second yoke, and a punch and lifting-sprin g carried by the other arm in line with the die, all combined substantially as described.

3. In an attachment for punchingmachines, a swinging two-armed yoke, a die carried by one arm of the yoke, and a punch carried by the other arm and having means for lifting thepunch, and a hand-grasp consisting of a sleeve surrounding the punch-body, allcombi-ned substantially as described.

t. In an attachment for punching machines, a swinging yoke carrying a punch, the body of the punch slotted transversely and perforatedlongitudinally, a pointer-feelerin the perforation of the punch, and a sleeve surrounding the punch and operating on the feeler by aconnection through the slot in the punch-body, substantially as described.

5. Inan attachment for punching-machines, the punch having a central passage with a spring-lifted feelertherein, and a handle surrounding the punch and connected to the feeler so that the-same may be depressed by the action of the handle,substantiallyas de- -chine,-and on the other arm a punch which maintains its alinemeut with the die but swings above the work under the machineplunger, and a handle bywhich the yoke may be swung, all substantially as described.

In testimony whereof I affixmy signature in presence of two Witnesses.

LEWIS WILLIAMS.

Witnesses:

H. W. STOREY, COLLINS M. SWAN.

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