US1771610A - Metal working - Google Patents

Description

July 29, 1930. .1. R. BLAKESLEE METALv WORKING Filed Feb. 16. 1925 A TTORNEYS Patented July 29, 1930 p UNITED "ezTeATrzs JOHN-3. BLAKESLEE, v01.1" CLEVELAND, OI-IIO,

PATENT oFFIcEj ASSIGNOB TO THE AJAX MANUFACTBING COMPANY, 0F. CLEVELAND, OHIO, CORPORATION OF OHIO" METAL woniinve Application filed February The present improvements have more particular, regard to the hot working of metal as in forging andv upsetting machines, the

`object beingthe provision of an improved method andapparatus for forming socketed articles such `as the heads of socket wrenches and the like from solid bar stock.

To the accomplishment of the foregoing and relatedends, the invention, then, consists of thesteps and means hereinafter fullyde-V l to'ol with stock in place in such dies, wherefrom articles of the character .referredto may be successively formed, each complete in a single operation.; Fig. 2 is afront elevational viewof such stationary die Aand the cutter holder carried thereby, `as thus shown in section in Figl; Fig. 3 is a side elevation ofV such stationaryl die and cutter holder as viewed from the leftin Fig. 2; Fig. 4 isv a front elevation, similar to that of Fig. 2, showingthe movable die part or cutter Fig. 5 is a side elevation of the finished article `which consists of` a soeleted wrench Yhead which the foregoing dies and heading tool .are adapted to form; Figs. `6 and 7 are end views of such finished article, viewing the 16 1925. serial No. 9,463.

and it is accordinglj7 deemed unnecessary to i show either the supporting bed forthe die, which includes a stationary part 1 and a movable part or cutter 2, or the mechanism whereby such movable die part or cutter holder 2 and the holder 3 for the heading respectively actuated.

' Said stationary die 1 is, attached to or otherwise iixedly mounted in front of a block 5 withwhich the movable cutter holder 2 `contacts, such holder .being transversely recip.

rocable from the position shown in Fig. 1 `so tool i are as toclear, when desired, the opening 6 in the stationary die part '1 when the stock is advanced and the block 5 being formed with an opening 7 aligned `with such opening 6 throughwhich such stock may be fed. Upon return ofthe cutter holder to its closed position, its inner end 8 cuts or shears off a predeterminedlength of the rod orV bar '(not the external form and dimensions of the article which is to be made, such article', as illustrated, being a wrench head 1() which, as shown in detail in Figs.4 `5, 6 and 7, is of cylindrical shape with an internal socket V10a of hexagonal cross-section and .is provided with a projecting shank 10? of square crosssection The rearward extension l1 of recess 9, which serves to form such shank 10b, extends entirely through stationary die 1, being closed by the forward end 12 of a kicker rod 13 which is reciprocably mounted in an opening 14 .that extends throughblock 5. The portion. v15 of this fopening immediately back of such recess extension 11 is enlarged to receive a corresponding enlargement 16 on Vsaid rod 13, the result of the construction being that in the position of parts shown in Fig. 1 the forward end of said kicker rodis maintained in proper position to `close the 65 shown) which hasbeen advanced and carries rear end of recess extension 11 by engagement ofsuch enlargement 16 with the back'wall of the opening or chamber 15.

The main portion or body of punch 4 is of the same cross-sectional form as recess 9 and the end 8 of the cutter is of complementary concave form so that in conjunction with the opposed portion of the stationary die 1, such body 4 of the punch is completely enclosed about. The forward end 17 of the punch is of the same cross-sectionand otherwise of the same form as the socket opening 'd which it is desired to produce in the finished article.

The complete cycle of operations vof the mechanism may now be set forth. Assuming the punch holder 3 to be retracted so asto completely withdraw the punch 4f with its extension 17 from the opening or recess 9 in the stationary die/1, and the cutter holder 2 to be similarly retracted so as to clear the Vstock feed opening 6, a measured length of stock is advanced beyond the forward endof'such last mentioned opening. Thereupon cutter holder 2 is closed Ywith the result, as

' already explained, thatV the projecting portion of the stock is cut olf and carried into position in recess 9. The kicker rod 1 8 at this stage is completely retracted, as shown in Fig. 1, and thereupon the punch holder is advanced so as to force the punch 4 with its extension 17 against the approximately cylindrical piece of stock previously placed there. As `a result the central portion of such stock is longitudinally displaced vto fill'the eXtension 11 of'recess 9, while the lateral portions of such piece of stock are held tightly con-Y lined between the forward end of the main body of the punch and the surrounding walls of recess 9. It will accordingly be seen that by a single operation of the punch an article of the sort shown in Figs. 5, 6 and 7 iscompletely fashioned, the shank being formed from the metal thus displaced from the headof the'article so as to leave the desired socket recess in the latter. Upon the punch'being now retracted to clear thev die for a secondV operation. the kicker rod 13 is simultaneously advanced and the forward portion 12 thereof serves to eject the finished article from the die. At the same time the cutter holder 2 may be withdrawn, the operation of the three moving parts being synchronized so that no time is lost in cutting olf andA placing a fresh portion of stock in the die recess 9 after the latter has been thus cleared of the previously formed article. Y

A small passage or duct 20, controlled by a ball valve 21 or the like, preferably leads from the forward end ofchamber 15, wherein the enlarged portion 16 of the kicker rod reciprocates, so as to permitlubricant to be introduced therein, and a vent opening'22 (see Fig. 8) may also be provided in the fixed die part 1, such opening communicating with the extension 11 of recess 9 and serving to permit the escape of any air that may be caught'in such recess extension. This last mentioned vent, however, is not essential for the air will Ordinarily readily escape past the forward end of the kicker bar. The line of division between the stationary and movable die parts 1 and 2 may be on a different plane from that shown in Fig. 1 without affecting the mode of operation. Thus, as shown in such llast mentioned figure, it may be aligned withV the rear or inner end' of recess 9, the stationary die 1 forming a part of the boundary of the recess and the movable element 2 completing they sam e.

Other modes of applying the principle of my invention may be employed instead of the one explained, change being made as regards the means and the steps herein disclosed, provided those stated by any of the following claims or their equivalent be employed.

I therefore particularly point out and distinctly claim as my invention 1. In mechanism for making socketed metal articles of the character described, the combination of a die comprisingrelatively 4movable members and having a recess of the dimensions of the body of an article to be lim formed and an opening parallel thereto for the feed of stock, said members having shearing edges whereby'on'movement of one a blank is sheared from stock projecting through such opening and is fed to the reicess, and means for displacing stock from the middle of such blank back beyond said body recess, said means including `a heading tool adapted'to enter the recess and having a reduced end, and a port at the rearof said body recess for receiving the stock displacedy from the middle of such blank.

2. In mechanism for making socketed metal articles of the character described, they combination of a die h'aving'a recess of the dimensions ofthebody of anV article to bev formed, a kicker rod at the base of such recess, a valve-controlled duct leading to said kicker rod, means including said die for shearing and feeding a blank of metal to the die recess,

vand means for displacing stock from the1 middle'of such blank back beyond said body recess, said means including a heading tool adapted to enter the recess and having a reduced end, and a port at the rear of said body recess for receivingthestock displaced from Y :the middle of such blank.

3. In mechanism for making socketed metal articles of the character described, the combination of a die comprising relatively los movable members and having a recess of the dimensions ofthe body ofan article to'be formed and an'opening for the feed of stock, said members having shearing portions whereby a blank is sheared fromrstock projecting. through such opening and is, fed to the recess, a kicker rod at the base of such recess, a valve-controlled duct leading to said kicker rod,and means for displacing stock from the middle of such'blank back beyond said body recess, said means including a heading tool adapted to enter the recess and having a reduced end, and a port at the rear of said body recess for receiving the stock displaced from the middle of such blank.

Signed by me this 12th dayof February,

JOHN R. BLAKESLEE.

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