US482356A - Punching and shearing machine - Google Patents

Description

(No Model.) 2 Sheets-Sheet 1.

F. N. HBLPRICHj PUNGHING AND SHEARING MACHINE. v

Patented Sept. 1s, 1892.

No. 482,356.l

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P. N. HELPRICH.

PUNCHING AND SHBARING MACHINE. v

t te: r rmt (No Model.)

WIJGSSQ/S NITED STATES PATENT Orncn.

FRANK N. HELFRICH, OF HEBRON, NEBRASKA.

PUNCHING AND SHEARING MACHINE.

SPECIFICATION forming part of Letters Patent No. 482,356, dated September 13, 1892.

Application iiled January 12, 1892. Serial No. 4117,86?. (No model.)

T0 all whom, t nur/y concern:

Be it known that I, FRANK N. HELFRICH, a citizen of the United States, residing at Hebron, in the county of Thayer'and State Aof Nebraska, have invented a new and useful Punching and Shearing Machine, of which the following is a specification.

This invention relates to metal punching and shearing machines; and it has for its object to provide a machine combining shearing and punching devices operated by the same mechanism, and therefore simultaneously with eachother.

It is the primary object of this invention to provide a machine of this character which shall be comparatively simple in 'construction, yet very efficient and convenient of manipulation in operation, anda machine which, while possessing these essentials, at the same time has a powerful leverage and is so constructed that the strain of the whole machine does not come upon any particular portion thereof.

With these and many other objects in view, which will be quite obvious to those skilled in the art, the invention consists in the novel construction, combination, and arrangement ofparts hereinafter more fully described and claimed. Y

In the accompanying drawings, Figure lis a perspective view of a combined punching and shearing machine constructed in accordance with my invention. Fig. 2 is a front elevation of the same. Fig. 3 is a rear elevation thereof. Fig. 4 is avertical sectional view on the line 4 4c of Fig. 2. Fig. 5 is a similar view on the line 5 5 of Fig. 3. Fig. 6 is a detail view of the punch-carrying plate or arm.

Referring to the accompanying drawings, A represents a suitable base or support, upon which is securely fastened the main stationary casting B, terminating at its forward end in a head C and provided at the other end with an upwardly-extending guide lug or projection c, that is designed to steady and guide the rear end of the pivoted shear D, pivoted to said stationary casting and forming the movable cutter ofthe shear. The said main casting B is further provided upon one side of the head thereof with a circular groove c', that is designed to receive the projecting annular pivot ring or iiange cl, projecting from one side near the cutting end of the shearblade or cutter D, and thus provides for a secure and strengthened Y pivotal connection between the pivoted shear D and the stationary castingcarrying the stationary shear, and which also serves to relieve the strain of the machine from the main pivot-bolt c2, passing through the head of the main casting and said pivoted shear. One end of the pivotbolt c2 is supported in the upper end of the angular brace-bracket c3, engaging said bolt upon the outer face of the pivoted or lever shear, and, bending under said shear, is securely connected with the body of the main casting, thus holding said casting and movable shear firmly together.

y The front upper edge of the head C is provided upon the side to which the pivoted shear is pivoted with a seat o4, Within which is secured the stationary shear or cutting-blade E, over which and in conjunction with which works the pivoted shear-blade d fastened in a corresponding square recess d2, located in the bifnrcated cutting end or head d3 of the pivoted shear D. From the cutting end or head d3 said pivoted shear D extends rearwardly the full .length of the main casting B to form a lever portion d4, working against the upwardly-extending steadying and guide lug o, projecting from the rear end of said cast-ing. A swinging connecting and operating link F pivotally connects the extreme end of the portion d4 of said pivoted shear with 011e arm of the bell-crank lever G, pivoted to the rear end of the main casting B, thus providing a toggle-joint leverage between the pivot of the bell-crank and the lever end of the pivoted shear. The free end of the bell-crank lever is provided with a socket g, that receives one end of the long operating-lever g. It can be seen as the operating-lever g is in its upwardly-extended position that the bell-crank arm and its connecting-link are at an angle to each other, and thus allow or cause the lever arm or portion d4 of the pivoted shear to be drawn down and the blade thereof to be raised above the stationary blade upon the main casting. The metal .to be cut can be easily placed between the cutting-blades and in the bifurcated end or head of the pivoted shear, and by pulling down the lever g the togglelevers, formed by the connection described,

throw the lever end of the pivoted shear up and cause the cutting-blade thereof to be carried down under great leverage upon the met-al under the same and cause the metal to be readilyand easily cut without material strain upon any part of the machine.

A holding-gage H is adjustably secured upon the face of the casting B opposite the pivoted shear and is provided with an adj usting-slot 7i, formed in the shank thereof and working over the set-screw h', by means of which the said gage may be regulated to adapt itselfV to the met-al to be cut. The gage H is further provided with a right-angularlydisposed gage end h2, which lies over the stationary blade-bed, and consequently over the metal placed thereon to be out, and thus holds the same down while being cut.

As stated, the forward or cutting end of the shear D is bifiircated to receive the metal to be cut under the blade carried thereby upon the end above the bifurcation. The end d5 of the pivoted shear below the cutting-blade d works upon the face of the main casting B, beneath the stationary cutting-blade thereon, and is provided with an inwardly-projecting pin l, working in or engaging the upper slotted end of the punch-carrying plate J, seated and working within the vertical recess j, formed in the casting-head C, directly below the cutting-blade c4 thereon.

The punch-carrying plate J is provided with a horizontal slot j at its upper end, in order to allow the said plate to be readily reciprocated by the oscillations of the pivoted shear. The lower end of the plate J is further provided with a coupling-pinj2, which engages a recess or perforation in one side of the reciprocating metal-punch K. The punch K is thus detachably connected to the reciprocating punch-carrying plate or arm and may be interchangeably used with other punches in various sizes, according to the nature of the work. The punch K, carried by the arm or plate J, tits snugly within the parallel guide and retaining lugs L, projecting from the head C on both sides of the vertical recess j therein, and thus, while accommodating and guiding the punch K, also guides the lower end of the punch-carrying plate or arm J, also workin@ within the same. A hinged retaining and cap plate M is hinged at m to one of said guide-lugs L and is designed to closely fit over the top of both of said lugs, and therefore over the punch between the same. The said capp1ate M is provided with the securinglugs m', between which the free end of a hinged securing or fastening bolt N takes. Said fastening-bolt N is pivoted at n to the front end of the head Gand carries the clamping thumbnut n', which when the bolt is thrown between the cap-lugs is designed to be tightened thereupon, and thus fasten the cap-plate over the lugs L and hold the reciprocating punch between the same therein.

rlhe casting Ais provided directly below the head C and the reciprocating punch with the die-bed O, which is itself provided with the die-seat o, which is designed to receive the form of die corresponding to'thcsize or form of punch employed, and said dies are held within the seat 0 by means of the setscrew o', workingthrough said bed and engaging the die `P therein,land' thus'provides for a detachable fastening for the dies.'

A punch-gage Q is adjustably seated in the vertical gage recess or seat q in the head C, directly opposite to the guide-lugs L thereon. The said punch-gage Q is provided with a vertical adj ustnient-slot q', which works over the set-screw q2 in said recess q and allows for the vertical adjustment of the gage. The said gage is provided with a slotted gage end g3, right-angularly disposed to the slotted portion of the same and lying directly over and parallel to the die-bed of the machine: The reciprocating punch works through said slotted gage end into its corresponding die and punches the metal as desired between the bottom of said gage end and said die. The said gage serves to securely hold the metal down upon the die-bed while the punch 1s withdrawn, so as to prevent the metal from being carried back with the punch. It is now a1:- parent that simultaneously with the movement of the pivoted shear and by the same means actuating the said shear the punchof the machine is operated and performs its special function, in conjunction with the rest of the machine, as fully set forth.

The advantages and operation and construction of the herein-described punching and shearing machine are thought to be apparent without further description.

Having thus described my invention, what l claim, and desire to secure by Letters Patent, isi- 1. In a machine of the class described, the combination of the stationary shear -blade having a circular pivot-groove near one end and an upward] y-extendin g guide-lug near the opposite end,the movable shear member provided with a circular pivot ring or flange working and fitting snugly within said groove and with an extended lever portion, a pivotbolt passing through said members at their point of pivot, an offstanding angle-bracket receiving one end of said pivot-bolt and secured to the stationary shear member, a bellcrank lever pivoted at its angle to said stationary member near one end, a toggle-forming link pivoted directly to the lever end of said movable shear member and to one arm of said bell-crank, and an operating-lever connected to the other arm of said bell-crank, substantially as set forth.

2. In a punching and shearing machine, the combination, with a stationary shear member provided with vertical parallel punch-guide lugs, of the movable shear member pivotally connected to said shear member, a reciprocating punch detachably connected with the pivoted shear member and moving between IOO IIO

said guide-lugs, aswinging cap-plate adapted AIO to be-swung against said guide-lugs toinclose the punch therein and away from the same to allow for the removal of the punch, and a clamping device arranged at one end of said stationary shear member and adapted to engage one edge of said cap-plate to hold the same closed, substantially as set forth.

3. In a punchingand shearing machine, the combination of a stationary shear member provided with a vertical recess, parallel guidelugs projecting beyond both sides of each recess and a die-bed located directly beneath the lower ends of said lugs, the pivoted shear member, a punch-carrying plate or arm loosely connected to one end of said pivoted shear member and working in said vertical recess and between said lugs, a reciprocating punch detachably connected to said plate or arm between said lugs, a hinged cap-plate inclosing the punch between said lugs, and operating mechanism, substantially as set forth.

4. In apunching and shearing machine, the combination of a stationary shear memberl provided with parallel guide-lugs and a diebed located beneath the lower ends of the same, the pivoted shear member, a reciproeating punch detachably connected with one end of the pivoted member and working between said guidelugs, a hinged cap-plate hinged to one of said lugs and provided with 3o projecting securing-lugs at its free edge and inclosing the punch within said lugs, ahin ged or swinging clamping-bolt pivoted at one end to said stationary member and adapted to be swung and clamped between the securinglugs of said plate to hold the same closed, and. operating mechanism, substantially as set forth.

In testimony that I claim the `foregoing as my own I have hereto affixed my signature in 4o the presence of two Witnesses.

FRANK N. HELFRICH. Witnesses:

JAS. DINsMoRE, W. E. GooDHUE.

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