US1402919A

US1402919A - Upsetting tool

Info

Publication number: US1402919A
Application number: US255174A
Authority: US
Inventors: Hjalmar G Carlson
Original assignee: Rockwood Sprinkler Co
Current assignee: Rockwood Sprinkler Co
Priority date: 1918-09-21
Filing date: 1918-09-21
Publication date: 1922-01-10
Anticipated expiration: 1939-01-10

Description

H. G. CARLSON,

UPSETTING TOO-L.

APPLICATlON FILED SEPT-21'119l8.

. 402 9 9 Patented Jan. 10, 1922.

2 SHEETSSHEET l- I-IJALMAR CARLSON, F WORCESTER, MASSACHUSETTS, ASSIGNOR, BY MESNE ASSIGNMENTS, TO ROCKWOOD SPRINKLER COMPANY OF MASSACHUSETTS, OF WOBCESTER, MASSACHUSETTS, A CORPORATION OF MA$SACHUSETTS.

UPSETTING moor.

Specification of Letters Patent.

Patented J an. id, 1922.

Application filed September-21,1918. Serial no. 255,174.

T 0 all whom it may concern:

Be it known that I, HJALMAR G. CAnLsoN, a citizen of the United States, residingat Worcester, in the county of Worcester and State of Massachusetts, have invented a new and useful Upsetting Tool, of which the following is a specification.

This invention relates to a set of dies for upsetting purposes.

The principal object of the invention is to provide. a construction of die which will permit of the upsetting of a blank or unfinished article in such a way as to form a square shoulder, and also in the preferred form of the invention to produce a thick transverse wall or diaphragm terminating in said shoulder. Another object is to produce these results by operations that involve no waste of metal because none of it has to be removed from the article. Further objects and advantages of the invention will appear hereinafter.

Reference is to be had to the accompanying drawings, in which- F 1 is a central sectional view of material portions of a die press showing a preferred embodiment of this invention applied thereto;

2 is a similar view on enlarged scale showing merely the die cavity and associatel parts, and

Fig. 8 is a similar view showing the parts in the position they assume when the upsetting operation is completed.

The invention is illustrated herein as used for the purpose of performing one operation in the manufacture of a combined adapter and booster casing A. This is received in the machine in the form shown in Figs. 1 and 2 in which it has a small cylindrical closed end, a large cylindrical open end a and a flat flange. The operation of the machine reshapes and shortens its large end to the form shown in 3 in which the sloping shoulder is squared up and a thick dia phragm or transverse wall a is formed. It is to '7 be understood, however, that the invention capable of use in connection with the manufacture of other articles of a similar shape. and in fact of various other shapes. \Vhile this is an upsetting operation it is performed by means of a die and punch so arranged that when the punch comes to its seat against the metal in the die, it will force the metal out into the form of a sharp shoulder and at the same time thicken the metal transversely so as to make a thick transverse wall or diaphragm.

Enough of the press is: shown to illustrate the metal working operation, which is the subject of this invention. For that purpose I have shown the press bolster plate 10 supporting the usual die bed 11. This die bed supports a female die shown as consisting of a plurality of members. For mechanical reasons I prefer to make it in several pieces. There is a central member 12 for receiving the blank A and the headed ejector 18 at the bottom. It supports a second member 14 which is hollowed out at the center to receive central die member 15. (in this die member 15 is supported a shoulder-forming die member 16 in the form of a ring having a flange at the bottom resting on the member 15. This member 16 is heldfirmly in position against the member 15 by a plate 17 held down by screws 18 entering the die bed. The member 1 1 is provided with sockets which support springs 20 which in turn support a movable die plate 21 adapted to move back and forth between the inner surface of the recess in the member 17 in which it is located and a stop plate 22 in the form of a ring. This is held down by the screws 18 and it projects over the edge of the plate '21. The springs 20 normally hold this plate 21 up against the plate 22.

Also supported by the bolster plate are a pair ofbolts 25 provided with springs 26, which springs hold up a stripper or pressure plate 27 which is movable up and down guided by the bolts 25. This plate is provided with a central platen 28 which, as will be seen, forms a part of the shaping mechanism. The

parts

27 and 28 are positively and firmly forced down by the bottom of the press slide 29 by well-known means as indicated. These

parts

27 and 28 therefore, reciprocate with the press slide 29 positively.

Inthe press slide 29 is a recess at 30 having a strong spring 31 therein pressing on a movable member 32 which supports ablock I art. Above the member 32 is a block 35 which rests loosely thereon and is spaced slightly from the top of the recess 30. In the operation of the plunger 34:, due to the reciprocation of the slide 29, the plunger is normally under the pressure of the heavy spring 31 at all times. If, however, any obstacle is met that increases the difficulty of forcing the plunger into the dies or article below, the amount that it can yield is limited by the length of the space between the top of the'block 35 and the top of the recess 30. The plunger is shown as longitudinally perforated to let the air out of the blank A when it descends.

The operation of the device is as follows: The partly finished article or blank A of cold drawn sheet metal is put into the central recess or cavity in the die plate 21 by hand. It will normally slide down either into the position shown in, Figs. 1 and 2 or nearly to that position. The press is then operated to bring the plunger down under the pressure of the spring 31 and the platen 28 downpositively. Before the plunger encounters any great resistance the platen 28 encounters and presses down upon the flat flange of the ar ticle A, which rests on the top of the die plate 21. As this platen 28 continues to descend under the influence of the positive pressure of the slide, it lowers the plate 21 against the resistance of the springs 20, and during that period the plunger continues to descend until it reaches the bottom of the article. The plunger is provided with a shoulderat 36 which comes finally into the position shown in Fig. 3; It will be noted that the ring 16 is stationary and cannot descend with the plate 21, but the open end of the article A with its flat flange does descend under the positive pressure'ofthe platen '28. Therefore the metal in the portion a of the blank is upset and forced out into the shoulder formed between the outer'edge of the ring 16 and the central passage through the die plate 21, as well as into the upper shoulder on'the inside edge of the flange and against the shoulder 36 on the plunger. These parts are so proportioned and arranged that the diaphragm or transverse wall a of the article being operated upon is materially thickened because it receives some of the surplus metal from the portion a.

When the plunger 34: and platen 28 are withdrawn the springs 20 tend to force the die plate 21 up to the original position and thus loosen the article from the dies below, and then the ejector 13 is operated in the usual way to force it out. It is to be observed that the plunger 34: both in its small and large sections is made to fit exactly in the blank as it is originally put into the press. Except for the shoulder 36, it is just like the plunger previously used to bring the blank up to that shape. So its only effect is to hold the metal and prevent its being squeezed inwardly in any direction except to fill out the shoulders as above mentioned. The positive compression due to the lowering of the platen 28 on the external flange of the article is also essential for the same purpose. This has to press down firmly on the article in order to avoid any danger of the flange itself receiving any of the sur- 7 plus metal from the section a.

It will be understood, of course, that while I havedescribed the invention as employed in the production of a particular article and the formation of a shoulder and thickened wall at a certain point therein, the invention is not limited to the production of an article of that shape or even to articles of similar shapes, but is of a general character as represented in the claims.

Therefore I do not wish to be limited to all the details of construction herein shown and described, but what I do claim is 1. The combination of a diecomprising a part for receiving and holding thearticle or blank to be operated upon and a relatively movable plate beyond the first named part and normally spaced from it but having only a limited range of motion relative thereto, and a second die member relatively movable to engage the article in the first die and provided with means associated with it for engaging said relatively movable plate so as to hold any part of the article extending between them, and then by their relative mo 100 tion upset the metal.

2. In a machine for upsetting'a blank having a tubular part provided with a larger diameter at one place than at another and a shoulder at the end of the larger part, the 05 combination of a die for supporting said blank provided with a member surrounding the blank and adapted to abut against the shoulder I thereof, a yieldingly mounted plate having a passage therethrough for the 0 surrounding member and for receiving the large tubular portion of the blank, and means whereby pressure can be exerted against said movable plate and at the same time hold the edge of the blank and force its 115 larger part longitudinally to upset the metal against the edge of said surrounding memher and shape the shoulder.

3. In a device of the character described, the combination of a pair of dies, one die having a cavity for receiving a substantially tubular article to be shaped therein and having a stationary part fitting the article and also a relatively movable yielding plate having a passage through the center thereof for said stationary part, whereby when moved longitudinally toward the stationary part the distance between the end of the stationary part and the corresponding end of the movable plate will be reduced, and a second die eomprisin a plunger adapted to project into said cavity and a stripper and pressure platen surrounding the plunger and adapted to engage the yielding or movable plate to force it longitudinally.

The combination of a die bed, afemale die thereon having a fixed part and a movable plate, the movable plate having only a limited range of movement, springs for holding the movable plate in one extreme position, a plunger movable into and through said die, and a pressure platen movable with the plunger for engaging any part of the article or blank to be shaped which pro ects beyond said movable plate and forcing the same longitudinally with said movable plate, whereby part of the metal in the blank will be upset and forced into any depressions in the die,

In a machine for upsettinga blank having a tubular part provided with a larger diameter at its open end than at the r closed d and a flange on its open end, the combination of a stationary die for supporting; said blank, said die comprising a ringshaped member at the end thereof for receiving the end of the smaller portion of the tubular blank, the end of said ring abutting against the shoulder of the blank at the end of said larger portion, a yieldingly mounted pl ate having a passage therethrough fitting .1 all o the blank is being: upset.

rw u i 7 n a macnine ioi upsetting, olanh in; a tubular part provuiled with a diameter at its open end than at the end, the combination of a stationary die for supporting said blank, said die comprising a ring-shaped member for receiving the end of the smaller portion of the tubular blank, the end of said ring abutting a ainst the shoulder of the blank at the end or said larger portion, a yieldingly mounted plate having a passage fitting the ring-shaped member and the large tubular portion of the blank, means for pressing on said yielding pla e and at the same time holding the edge of the blank and forcing it longitudinally with the yielding plate to upset it against the end of said ring-shaped member, and a plunger fitting the interior of the blank to prevent any flow of the metal inwardly while the large portion of the blank is being upset.

7. The combination of a die bed, a female die thereon having a fixed part and a movable plate, the movable plate having only a limited range of movement, springs for holding the movable plate in one extreme position, a plunger movable into and through said die, a pressure plate movable with the plunger for engaging any part of the article or blank to be shaped which proects beyond said movable plate and forcing the same longitudinally with said movable plate, positive means for moving said pressure plate into position to hold the article and move it and the movable plate, and yielding means for moving the plunger with the pressure plate.

8. The method of upsetting a tubular blank which consists in positively holding he interior of the blank at all points to prevent flow inwardly, also'holding its exterior at both ends thereof and positively gripping the open edge, confining the portion of the blank beyond the point at which it is held on the GXQQllOI and then moving the open end of saidblanl; longitudinally to upset the metal and fill all interstices in the holding; means.

In testimony whereof I have hereunto affixed my signature;

HJAlZll lillt G. CARLSON.