US290433A

US290433A - Punching-press

Info

Publication number: US290433A
Authority: US
Publication date: 1883-12-18
Anticipated expiration: 1900-12-18

Description

(No Model.) 2 Sheets-Sheet 2.

E. JORDAN. PUNCHING PREss,

- Patented Dec 18, 1883;

at PEYERS. Pllnhrhllmguplmr. Wmshmgkam D.C.

UNITED STATES A PATENT OFrIcn.

EDMUND JORDAN, or

BROOKLYN, ASSIGNOR TO ELIPHALET \V. BLISS, OF

NEWVUTRECHT, NEW YORK.

PUNCHlNG -PRESS.

SPECIFICATION forming part of Letters Patent No. 290,433, dated December 18, 1883. Application filed ma 1?, 1883. (No model.)

punching, or forming sheet metal or other ma-' Such presses are terial into various shapes. always provided with a bed or table on which a die or its equivalent is fixed, while above the table a plunger or slide carrying the die or its equivalent is arranged to reciprocate up or'down in relation with the die on the table, in order to act upon the material placed be tween them, in the well-known manner. My invention aims to improve this class of machines in the matter of easy adj ustability, and in simplicity, compactness, and strength of construction; and the invention is located, chiefly, in the construction of the work or die table of the machine and its connection with and relation to the fixed frame of the machine and to the reciprocating plunger; also, in the special construction of the frame of the machine, and in the special mechanism for operating the plunger, as hereinafter fully set forth.

In the drawings annexed, Figure 1 gives a front elevation of my improved press, and Fig. 2 is a sectional side elevation thereof on the central line of the machine. Fig. 3 is a plan view, and Fig. 4 is a sectional plan on line a; a: of Figs. 1 and 2.

Machines of this class, as heretofore designed, are usually made with a strong fixed table-top mounted upon legs, with an overhanging arm or standard rising from the back part of the table and depending over the front part, which arm supports the reciprocating slide and the mechanism for operating it, one part of the die or plunger being of course attached to the slide, while the other part is fixed upon the table below it. This table has been uniformly fixed or non-adjustable toward the stroke of the slide, while the slide ismade adjustable in the direction of its stroke to or from the die-table, which adjustment has usually been effected by altering the length of the connection between the slide and the driving mechanism operating it. This connection always requires to be very strong in order to resistthe heavy strains applied through it, and when made adjustable it requires to be formed in several parts, which is not conducive to strength, and also renders the construction complicated and expensive, and not usually capable of easy and quick adjustment. In

some cases, however, the die or die-bolster Referring to Figs. 1 and 2, the frame or body of the press consists of a strong upright column, a a, which rises from a base, a, The column is of a square U form in crosssection, or like a three-sided box or tube open in the back, as shown best in Figs. 3 and 4, and it is curved at the top in an elbow form, to produce an overhanging head or arm on top of the column, as shown best in Fig. 2. In the end of this overhanging arm is formed a vertical dovetailed way or socket, (see Figs. 1, 2, and 3,) in which a strong slide or plunger, 12, is fitted, so as to be capable of free reciprocation up and down therein. The edges of this slide 1) are-of course dovetailed, as shown in Figs. 1 and 3, so as to fit the dovetailed sides of the way, and one side of the way is recessed to hold an ordinary form of gib,(shown by dotted lines in Fig. 3,) which is adjusted and held in proper position by the usual arrangement of set-screws and jam-nuts, (shown in Figs. 1 and 3,) soas to bear uniformly on the slide and enable it to move truly and freely in the ways without looseness, as will be understood.

- Now, the column a, with its overhanging head a and its base a, are all preferably cast in one integral piece, which produces aframe of great solidity and strength, which is most desirable in this class of machines, and also materially simplifies and cheapens the manufacture thereof. The front of the column, below the overhanging head, is cast with a nearly vertical face, from which protrudes two broad rectangular bosses, c c, leaving a recess or groove, (2, between them, as well shown in Figs. 1, 2, and 3, which bosses are planed off smooth and level.

Now, the die-tableis shown at f, and is formed separate from the frame or column of the machine in, the shape of a strong bracket, and is adapted to abut against and be fastened to the front wall of the column below the overhanging head of the same and under the reciprocating slide 1), as shown best in Figs. 1 and 2.

, This table is preferably formed in one solid iron casting, its top projecting at right angles to its back, or nearly so, in the form of an L or bracket, as before described, the top and back being rigidly braced by two strong triangular bracket-flanges, f, springing from one to the other, as illustrated. The top of the table is planed off true, and is also formed with a central hole to be better adapted to receive the dies or other tools to be attached thereto; but of course the form of the top will vary with the special purpose of the machine. The back of the table-bracket is formed with a central projecting tongue, 9, as seen in Fig. 1, on either side of which the bracket is planed off level to fit against the bosses c c on the front of the column, while the tongue g enters the groove (1 between them, as seen in Figs. 2 and 3, thus enabling the table-bracket to fit firmly and centrally upon the column a, in which position it is held by two strong bolts, 71. 2', arranged at right angles to each other, as shown best in Fig. 2. The horizontal bolt h, which may be termed the clampingbolt, is passed through a strong cross-bar, k, which fits across the interior of the column, near the open back thereof, and bears against two lugs or stops, Z Z, cast on the inner sides of the column, as shown best in Figs. 2 and 4. The headed end of this bolt h rests directly against the cross-bar 75, while the threaded end passes through a vertical slot, m in the front of the column, and thence screws into the back of the table-bracket f. The upright bolt 1', which may be termed the adj usting and thrust bolt, is screwed into the lower end of the bracket, and its head rests 011 a strong lug, n, which protrudes from the front of the column, and is preferably cast integral thereon, as shown in Figs. 1 and 2. It will therefore be seen that by the means described the table has a movable or adjustable connection with the column, so that by first relaxing the clamp-bolt h and then turning the boltvl one way or the other the table may be set hi gher or lower on the column, and thereby adjusted up or down in the direction of the stroke of the slide I), and when thus adjusted in the position desired in relation to the slide the clamp-bolt h may be tightened, and the table will then be rigidly held at the adj nstment desired. The slot m, lugs Z, and the bolt 2' are all made sufficiently long, as shown, to allow a good range of adjustment, as will be understood. It will therefore be obvious that any relative adjustments of the plunger to the die, which are always required in machines of this class, can be made by the means here shown, by adjusting the table in lieu of adjusting the slide, and in a very quick and easy manner, and in a way which enables very fine adjustments to be made, and involves a much simpler, less expensive, and stronger construction than the adjustable means heretofore employed.

heretofore adopted the supporting frame or legs of the machine and the table-top are made separate, and then fastened fixedly to each other, and the reciprocating slide is then made adjustable toward the fixed table, or the die made adjustable on the fixed table, whereas in my case the supporting frame or column and the overhanging head are made in one integral piece, and the table is made separate therefrom and attached to the column by means which at once serve to both support the table and render it adjustable up and down to or from the slide, which of course dispenses with any adjustable construction in the slide, and therefore greatly improves the general construction of the machine in the matter of easy adjustment, simplicity, and strength. It will also be seen that the adjustment of the table instead of the adjustment of a bolster, as has heretofore been practiced in presses, has the advantage of greater solidity and strength, and prevents any damage to the dies in changing the vertical position thereof, because the die may be bolted fast to the table and the adj ustment readily made to accommodate various thicknesses of metal, or the number of sheets struck up at once, whereas if a fixed table be used and an attempt is made to vertically adjust the die by means of the bolster, made adjustable by nuts surrounding the shank, as has been proposed, there is nothing to keep the die and bolster from turning on the center of the latter, and hence great care of subsequent adjustment is necessary, or there is great danger of injuring the die.

It will be readily noted that the advantage of casting the column of the machine with a cross-section similar to a three-sided box open on the back, as before described, is that this form is exceedingly simple, easily cast, presents a smooth external shape, and possesses great strength, as befits a stamping-press, and, furthermore, the open back admits the working parts of the machine very conveniently, and safely incloses and protects the same, as will be readily appreciated by reference to the drawings.

The lower end of the slide 1) is of course provided with a suitable form of clamp chuck or holder to hold the male part of the die or other tool in the ordinary manner, and the It will be noted that in the constructions machine is provided with any suitable mech anism for operating the slide and imparting thereto the usual reciprocating motion.

I do not confine the features of my invention already described to any special kind of operating mechanism, whether adapted to be driven by the foot or by steam-power, as this mechanism may vary with the size and nature of the press in which my invention may be embodied. In the drawings I have shown the 4 press adapted to be operated by foot-power and provided with a special arrangement of mechanism for actuating the slide, which is advantageous and forms a minor feature of my invention. This mechanism involves a footlever, 0, which is pivoted at about its middle in a slot in the base of the column, its front arm projecting forwardly and tipped with a treadle-plate to receive the pressure of the foot, while its opposite arm projects through the open back of the colunm, and is connected by a heavy connecting-rod, p, with the longer arm of a short and strong elbow-lever, r. The fulcrum-hub of this elbow-lever is p i ted between two bosses 1- cast on the inner aces of the hollow column and on a strong stud or pin which passes through said bosses, as shown in Figs. 2 and 3, thus pivotally supporting the lever in a very strong and simple manner; The short arm of the elbow-lever is connected by a parallel pair of links, 8, with the long arm of a lever, 25, which is pivoted on a pin, t, in a slot through the overhanging head of the column. The short arm of the lever t projects through said slot and enters a slot in the slide 12, and the top of this arm is formed with a rounded tread or rolling camface, which bears upon a gib, b, which rests upon the base of the slot in the slide, as shown force in stamping or punching, and by reason of the toggle character of the parts 8 r the leverage and power become concentrated at the terminal motion of the slide, which will be coincident with the straightened position of the toggles, as will be understood, thus eX- erting the greatest pressure at the terminal movement, where the greatest resistance is usually offered by the material being stamped.

The links 8 may be connected with the elbowlever r at either a longer or shorter radius, as will be understood from Fig. 2, whereby the stroke and leverage of the slide may be Varied, and for a similar purpose the connecting-rod 19 may be coupled with the treadle-lever at three different points, as indicated in Fig. 2.

\Vhat I claim is 1. In a stamping or equivalent press, the upright supporting-column having an overor attached on said column below said overhanging head and its reciprocating slide, and adjustable up or down thereon in the direction of the stroke of the slide by means of the independent screw-bolt t and tightening-screw h, and provided with means for preventing lateral or rotary movement of the table during adjustment, all constructed, combined, and arranged substantially as herein shown and described.

2. Ina press of substantially the kind described, a supporting-column and overhanging head cast in one piece, with a reciprocatingslide working in said head and mechanism for operating the same, a separate die or work supporting table, f, movably fixed on the front of said column below said overhanging head, and adjustable thereon in the direction of the stroke of the slide by means of the independent screw-bolt i and tightening-screw h, and provided with means for preventing lateral or rotary movement of the table during adjustment, all constructed, combined, and arranged substantially as herein set forth.

3. The combination, with the supporting frame or standard, of the reciprocating slide or plunger and mechanism to operate it, the separable or movable bracket or table f, having a level backto fit against a level face upon the standard, and the adjusting screw-bolts, arranged, respectively, to clamp said bracket against the standard and to adjust it vertically thereon, substantially as herein set forth.

. 4. In a press substantially as set forth, the supporting-frame a, formed in the shape of an upright column with an overhanging head, cast in one piece, and being in cross-section like a three-sided box, a slide working in said head, a treadle having its fulcrum in said column, and working through an aperture cast in the front of and near the base thereof, mechanism supported by said column connecting the treadle and slide, and a separate die or work supporting table movably fixed on the front of said column below said overhanging head, and adjustable thereon in the direction of the stroke of the slide by means of the independent screw-bolt i and tightening-screw h. all constructed, combined, and arranged substantially as herein shown and described.

5. In a stamping or equivalent press, an upright supporting-column having an overhanging head or arm on the top thereof, a reciprocating slide or plunger movable thereon, a treadle working through an aperture in the base of the column, and mechanism connected with the treadle for operating said slide, with a die or work supporting table adj ustably fiXed or attached on said column below said overhanging head and its reciprocating slide, and adjustable up or down thereon in the direction of the stroke of the slide by means of the independent screw-bolt i and tighteningscrew h,

bination, with the reciprocating slide 1), 0f the IO levers t and 1', toggle link 01 links 8, connecting-r0d p, and lever 0, substantially as herein shown and described.

EDMUND JORDAN.

\Vitnesses:

CHAS. M. IIIGGINS, ROBERT OBYRNE.