US684488A - Manufacture of wrench-forgings. - Google Patents

Description

No. 684,488. Patented on, 15, [90L P. A. WHlTN EYL MANUFACTURE OF WRENCH FORGINGS.

(Ap lic atxun filed Apr. 20, 1901.) (No Model.) 7 Sheets-Sheat 3.

Patented out. l5, l90l.

P. A. WHITNEY. MANUFACTURE OF WRENCH EORGINGS.

7 Sheets-Sheet 4.

(No Model.)

H mm

Patentd Oct. l5, mm. P. A. WHITNEY.

MANUFACTURE OF WRENCH FOBGINGS.

(Application filed Apr. 20, 1901.)

7 Sheets-Sheet 5.

wuemm 140a,

fl JAY- auto mug Patented Oct 15, I901;

P. A. WHITNEY. MANUFACTURE '.UF WRENCH FUBGINGS.

(Application filed pr. 20, 1901'. g

7 Sheets-Sheet 6.

(No Model.)

No. 684,488. v Patanted'flct. l5, I90l.

. I P. A. WHITNEY.

MANUFACTURE OF WRENCH EOBGINGS.

(Application filed Apr. 20, 1901.)

( N 0 M 0 d e l 7 S h e e i s S h e e i 7.

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Y, aw a UNITED STATES PATENT OFFICE.

PARDON A. WHITNEY, OF SOUTHINGTON, CONNECTICUT, ASSIGNOR TO THE PECK, STOVVE & WILCOX COMPANY, OF SAME PLACE.

MANUFACTURE OF WRENCH-FORGINGS.

SPECIFICATION forming part of Letters Patent No. 684,488, dated October 15, 1901.

Application filed April 20, 1901.

T (tZZ whom it may concern.-

Be it known that I, PARDON A. WHITNEY, a citizen of the United States of America, residing at Southington', in the county of Hartford and State of Connecticut, have invented a certain new and useful Improvement in the Manufacture of Wrench-Forgings, of which the following is a description, reference being had to the accompanying drawings, wherein- Figure 1 is a View in lengthwise vertical section of the first pair of vdies used in the practice of the process. It also shows a plain bar of stock suitable for the practice of the process. Fig. 2 is an endwise View, on a smaller scale, of the dies shown in Fig. 1, with the plain bar of stock seated therein preparatory to the operation of the dies. Fig. 3 is a View of the stock: as it comes from the dies shown in Figs. 1 and 2 and of the dies next to be used in operating on that stock, (the second pair of dies,) the lower die being shown in lengthwise Vertical section. Fig. 4 is an endwise View, on a reduced scale, of the dies shown in Fig. 3, with the stock seated therein ready to be operated upon. Fig. 5 is a view of the stock after it has been operated upon by the dies which are shown in Figs. 3 and 4. Fig. 6 is a view of the same stock which is shown in Fig. 5, partly in central vertical longitudinal section. Fig. 7 is a View of the third set of dies, together with their product. Fig. 8 is an endwise view of the fourth set of dies with the stock therein ready to be operated thereon. Fig. 9 is an endwise View of the same dies that are shown in Fig. 8 after the dies have operated. Fig. 10 is a view of the forging as it comes from the dies shown in Figs. 8 and 9. Fig. 11 is a View of the forging shown in Fig. 10 after it has been completed into a movable wrench-j aw and assembled as a part of a wrench. Fig. 12 is a view of a forging similar to that shown in Fig. 10 with the arms welded together. Fig. 13 is a View of the wrench-jaw in Fig. 12 finished into final shape.

' The object of this invention is the production of the movable jaw of a wrench, which is accomplished by the process hereinafter set forth, and illustrated in the drawings, the same involving the use of four sets of dies and their operation upon a bar of stock, the

first set operating on a plain bar, the second Serial No. 56 ,774. (No model.)

set on the stock as it comes from the first set, and so on. For this reason I necessarily use the several sets of dies in combination or conjunction with each other, the faces of each set save the first being so shaped as to act on stock already partially formed.

The first set of dies 1 2 and the plain bar of stock 3 are shown in Fig. 1. The upper die 1 has two punches 4 and 5, which produce the cavities 6 and 7 shown in the stock 30 of Fig. 3, leaving two projections 190 and 170, respectively, in front and in rear of the cavity 6. The lower die 2 has asocket 8 to produce the peen 9 (shown in Fig. 3) and is recessed at 10 to admit the shoulder 11 of the stock, as also seen in Fig. 3. Fig. 2 is adiagrammatic View showing the operation of the dies 1 and 2 on the plain stock-bar 3, and in Fig. 3 is shown the partially-formed stock-bar produced by the first set of dies.

The second set of dies 12 and 13 is shown in Figs. 3 and 4. The upper die has a splitting-knife 14, and at the ends thereof two shorter splitting-knives and 16, and the lower die has a socket 8, corresponding with that in the lower die 2. Fig. 4 is a diagrammatic view showing the operation of the second set of dies on the partially-formed stock 30, and Figs. 5 and 6 show the resulting stockbar 300, produced by this operation. The longer knife 14 splits or cuts the projection 170 between the cavities 6 and 7 and produces two arms 17, which the curved faces 18 of the lower die 13 bend outward, as shown in Figs. 5 and 6. Meanwhile the forward shorter knife 15 splits or cuts the projection 190 forward of the cavity 6 and produces two arms 19, which are also curved outward by the faces 18. The shorter rearmost knife 16 assists the longer knife 14 in splitting or cut= ting the projection 170; but this knife and the other short one 15 reach only to the points 20, (shown in Fig. 6,) while the longer knife 14 cuts the deeper notch 21, also best seen in this view.

The third set of dies 22 and 23, with their product 3,000, are shown in Fig. 7. The upper die 22 here has a long rounded nose 24, with shoulders 25 and 26 at the ends thereof and shorter side shoulders 27, and the face 28 of the die at opposite sides of the nose and its shoulders has lugs 29. The lower die has a deep socket 8 for the peen 9 and a longitudinal mortise, which is transversely rounded at its center, as at 31, and is slightly deeper and wider at each end thereof, as at 32, these latter portions receiving the backs of the arms 17 and 19 of Fig. 5. The central portion of the mortise has side shoulders 33 to cooperate with those numbered 27, above which it is curved outward, as at 18. The deeper end portions also curve outward, as at 18, but to a greater extent, and terminate in sockets 34, cooperating with the lugs 29. The product 3,000 produced by this third set of dies has the peen 9, shoulder 11, and arms 17 and 19 of the product shown in Fig. 5; but the notch 21 is rounded transversely, as at 35, by the nose 24, while the back of the body (which is the bottom of the stock shown in Fig. 5) is rounded transversely, as shown at 36, and the shoulders 25 and 26, cooperating with the end portions 32 of the mortise, flatten the bottom of the notches 20, as shown at 37, and considerably widen these notches, so that the arms .rise from the. side edges of the stock instead of fromitscenter. Thelugs29,coeperatingwith the sockets 34, produce ears 38 at the upper ends of the arms and form recesses 40 in the upper faces of these ears.

The fourth set of dies, which I call the forming-dies, is best seen in Figs. 8 and 9, and their product 30,000 is seen in Fig. 10. These dies are numbered 41 and 42, and the upper die has a nose 43, with a flat bottom 44, beveled sides 45, and side recesses 46 in its shank adjacent its face 47. The lower die 42 has outwardly-inclined side walls 48, parallel with the beveled sides 45,'and a rounded mortise 310 at its bottom, corresponding with that numbered 31 in the die 23. Fig. 9 shows the operation of these dies, which is to straighten the arms 17 and 19 and bend them inward toward each other to the position best seen in Fig. 10. The fiat bottom 44 of the nose 43 rests upon the fiat-bottomed notch 37 of the stock-bar 3,000, and the result is that these forming-dies practically do nothing but'bend the arms of the stock-bar 3,000 into the shape shown in Fig. 10. These dies may have the cutting-tool for severing the wrench-jaw from its body on the dotted line 3,001, or that cutting may be done by any suit-' able means forming no part of the present invention. A subsequent step is the press ing of the arms 17 and 19 still further together and their connection in pairs, which may be by rivets 50, as shown in Fig. 11, or by welding, as at 51, as shown in Fig. 12, and then shearing or removing the bur at 52, so that the finished article shall resemble that shown in Fig. 13. In certain forms .of wrenches a hole 53 must be bored and threaded for the entrance of the screw 54, by which the movable jaw is operated along the shank 55 toward and from the fixed jaw .56. It will be understood by those skilled in the art to which this improvement appertains that the stock is suitably heated at intervals in this process and that fins when they occur are sheared off at the proper times.

It is well-known to those skilled in the art that it is not necessary to provide separate sets of die-blocks for each operation in this process, as it is customary in drop-forging work, in order to save the cost of an extra drop, to cut into a single set of die-blocks the impressions for two successive steps in the operation.

What is claimed as new is-- 1. The improvement in the process of mak ing wrought-metal wrench-jaws consisting in first subjecting the plain stock-bar to the action of a set of dies which produce two projections on one side of the stock-bar and one projection on the opposite side; then subjecting the product of said first set of dies to the action of a second set of dies which split into two arms each of said two projections lengthwise of the stock; and then subjecting the product of said second set of dies to the action of a third set which further shape and form ears 011 said arms; all substantially as described and for the purposes set forth.

2. The improvement in the process of making wrought-metal wrench-jaws consisting in first subjecting the plain stock-bar to the action of a set of dies which produce two projections on one side of the stock-bar and one projection on the opposite side; then subjecting the product of said first set of dies to the action of a second set of dies which split intotWo arms each of said two projections lengthwise of the stock and bend said arms outward; then subjecting the product of said second set of dies to the action of a third set of dies which further shape and form ears on said arms; and then subjecting the product of said third set of dies to the action of a fourth set of finishing-dies which bend said arms toward each other; substantially as described and for the purposes set forth.

3. The improvement in the process of making wrought-metal wrench-jaws consisting in first subjecting the plain stock-bar to the action of a set of dies which produce two projections on one side of the stock-bar and one projection on the opposite side; then subjecting the product of said first set of dies to the action of a second set of dies which split into two arms each of said two projections lengthwise of the stock and bend said arms outward; then subjecting the product of said second set of dies to the action of a third set of dies which further shape and form ears on said arms; then subjecting the product of said third set of dies to the action of a fourth set of finishing-dies which bend said arms toward each other; and finally further bending said arms toward each other and connecting their ears in pairs; all substantially as described and for the purposes set forth.

4. The improvement in the process of mak ing wrought-metal wrench-jaws consisting in first subjecting the plain stock-bar to the ac tion of a set of dies which produce two projections on one side of the stock-bar and one projection on the opposite side then subjecting the product of said first set of dies to' the action of a second set of dies which split into two arms each of said two projections lengthwise of the stock, bend these arms outward, and form shallow notches between them and a deep longitudinal notch between the shallow notches; and then subjecting the product of said second set of dies to the action of a third set which round the deep notch and flatten the bottom of the shallow notches, and which further shape said arms and form at their outer ends ears containing recesses; and then subjecting the product of said third set of dies to the action of a fourth set which bend the arms toward each other; all substantially as described and for the purposes set forth.

5. The improvement in the process of makin g wrought-metal wrench- -jaws consisting in first subjecting the plain stock-bar to the action of a set of dies which produce two projections on one side of the stock-bar and one projection on the opposite side; then subjecting the product of said first set of dies to the action of a second set of dies which split into two arms each of said two projections lengthwise of the stock, bend these arms outward, and form shallow notches between them and a deep longitudinal notch between theishallow notches; then subjecting the product of said second set of dies to the action of a third set which round the deep notch and flatten the bottom of. the shallow notches, and which further shape said arms and form at their outer ends ears containing recesses; and finally bending said arms toward each other until the ears are brought into contact in pairs, and securing said ears to each other; all substantially as described and for the purposes set forth PARDON A. WHITNEY.

Witnesses i D. S. KREIMENDAHL, H. E. HART.

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