US2670779A

US2670779A - Joggle die

Info

Publication number: US2670779A
Application number: US249579A
Authority: US
Inventors: Albert V Mowrey
Original assignee: JOHN H EADES; WOODY SIMS
Current assignee: JOHN H EADES; WOODY SIMS
Priority date: 1951-10-03
Filing date: 1951-10-03
Publication date: 1954-03-02
Anticipated expiration: 1971-03-02

Description

March 2, 1954 A. V, MOWREY 2,670,779

JOGGLE DIE Filed Oct. 3, 1951 2 Sheets-Sheet l wrm. y Z A ALBERT V. NIOWREY IN VENTOR ATTORNEY Patented Mar. 2, 1954 JOGGLE DIE Albert Mowrey, Fort Worth, Tex'., assignor of onedhird.v to, John H. Eades and; onethird. to Woody Simahoth of Dallas, Tex.

ApplicationY October 3, 1951, Serial No. 249,579

iClalms. (Cl. 1.53-2;1)

This invention relates to offeset or joggle. dies such as those used in the construction of air craft and other assemblies wherein matching parts are joined in a manner so as to provide a smooth continuous outer surface for supporting sheet metal skin or the like. It is to be understood that the invention is not limited to the foregoing use, but may be used for forming any joggle in a part wherein one surface thereof is to be odset to provide two surfaces in substantial- 1y parallel planes.

It has been the practice to machine special sets of blocks of steel or: other hardmetal tovery exact dimensions for use in die sets for forming joggles. The machining was time consuming and the costv of materials was expensive. After the required number of production parts were made the steel blocks were. scraped. Another disadvantage oi the prior joggle sets was the limited use of the samev for forming diierent joggles in parts having the same cross-sectional dimensions. It is also pointed out that the various production parts have different radii and other dimensions which make reuse of such block impracticalv in most cases.

An object of the invention is to provide a die for use in a punch press, press brake or the like, and wherein the punches and dies for the same may be made with very little machining; if any, of the punch and die.

Another object of the invention is to provide a juggle die. wherein the juggle is drawy formed and wherein Wrnkling of the production part` is eliminated. Y

Another object of the invention is` toaprovide-r a juggle die wherein the depth and length of the loggie formed may be varied in any production part having the same cross-sectional dimensions without using diierent punches and dies.

A further object of the invention is to provide a die wherein the joggle formed may be: at any angle; and wherein both up and down joggles may be formed using the same punch and die.

A` further object of the invention is to pro` vide. a. jaggle die for'extrusions, rolled strip stock and other elongated parts of uniform cross-sec tional area and wherein no stops are needed other than a mark on the length of the part to be ioggled or on the die.

Figure 1Y isr a side elevation of a joggle die embodying the. features of the present invention.

Figure 2V is a verticalv longitudinal' section of the jaggle die illustrated in Figurer Figure 3 is a broken perspective view showing a 2 transverse section. taken at approximately the center ofthe die illustrated inFgures 1 and12.

Figure 4 is a transverse sectional view similar to the left portion of the die illustrated in Figures 1 and 2, but showing a different type of different production part received therein.

Figures 5 and 6 are end views of the punch holder and die holder having an arrangement and construction for joggling other types of pro duction parts.

The form of the invention shown includes a punch plate i0 and die shoe H, both of whichv may be modified for attachment to a punch press. press brake or the like, and which attachments not, therefore, described in detail. The assembly, other than the referred to plate ld and sho-e Il. is comprised of two subassemblies A and Bwhch, in effect, operate independently of each otherin sofar as the vertical movement is concerned. vThe best example of the left subassembly A is shown in Figure 4 wherein the punch holderl l2' is 'detacha-bly and adjustably secured to a lower sur'- face of thepunch plate i0. by means of clamps I3. Shoulders i4 are provided along the opposite sides ol* the punch holder r2 and wherebyr the latter may be longitudinally adjusted relative to the length of the production part l5 to beormed.

Similarly, there-is a base I8 of approximately the samerwidth as the extending shoulders I'4f of the punch holder l2, and which base is also longitudinally adjustable with respect to the production part l5 tobeformed, and is held in place by means of clamps H' mounted on the shoel l'. A resilient pad l8r is mounted on the base lliy and supports aA die block i9 thereon. A wedge shaped channel 2li, lengthwise of the assembly, is pro vided for receiving correspondinglyshaped and cpposingly arranged-jaws 2l therein. Vertical guide pins 22 are secured in the base i6 and extend upwardlyfthrough the resilient pad I8 where they are slidably engaged in bored openings 23 in the lower' surface of the die bloei; i9'. It is to be understood thatthe guide pins 22 and bored openings 23 are arranged on opposite sides of the wedge shaped channel 2n. The jaws 2l are supported on spiraled compression springs 24, the ends of' which are received within drilled

openings

25 and 25 in the bottoms of the jaws 2i and the horizontal surface ofthe channel 25. The aligned drilled holes 25 and 2S are substantially parallel with the adjacent wedge Shaped surfaces inthe jaws 2l.

The subassembly Br` shown on the right hand' side of Figure l is in substance the same as the iirst described subassembly A, but the resilient action is inverted with respect thereto. A longitudinally adjustable holding plate 21, which corresponds with the previously described base IB, is secured to the lower surface of the punch plate I by means of clamps 28 mounted in the latter. Downwardly extending guide pins 29, shown in Figure 2 only, are secured in the lower surface of the holding plate 2'| and extend through a resilient pad 3B and are slidably received in bored holes, not numbered, in a punch holder 3|.

The die block 32 for the subassembly B is provided with a wedge shaped channel 33 which is in alignment with and is of the same size as the first described channel 20, and is similarly provided with opposing jaws 34 therein, all in the manner as previously described and which jaws are provided with springs, not shown, in the same manner as the previously described springs 24. The sides of the die block 32 are provided with shoulders 35 which are engaged by clamps 3E mounted on the die shoe By means of the last described clamping arrangement the die block may be longitudinally adjusted relative to the length of the production part 3l to be formed. Both sets of jaws 2| and 34 are longitudinally grooved so as to provide matching T-

shaped channels

38 and 39 for receiving die inserts 40 and 4| which are of low temperature quick setting material. Similarly the punch inserts 42 and 43 are of the same last referred to material and are secured to the respective punch holders I2 and 3| of the subassemblies. The die inserts 48 and 4| are secured to their respective jaws 2| and 34 by any suitable means.

The die inserts 4i?, 4| and punch inserts 42 and 43 are made in a separate mold, not shown, and in which a length of the production part to be joggled is used as a pattern. The mold is shaped to form the lower part of the casting to fit the T channels 3B and 39 of the jaws 2| and 34. The upper surface of the pattern is at the top of the mold and provides for forming the punch inserts 42 and 43. After casting, the casting is transversely divided to form the separate punch inserts, last referred to, and the separate die inserts. The die inserts 40 and 4l are then longitudinally divided, ordinarily along their centers when the production parts are symmetrical along their longitudinal center lines, as in the referred to parts i5 and 31. It will be noted that a punch insert is not required for the T-section illustrated in Figure 4 as the punch holders l2 and 3i bear directly against the upper surface of the part to be joggled. In Figure 5 an angle section i4 is held between the divided die inserts 4e, and the punch holders l2 and 3| bear against the horizontal side of the part so held. In Figure 6 an s-section is received between the die inserts 40 in the same manner as last described, but it will be noted that the inserts are divided beneath the lower flange of the Ssection.

In operation, the angle and depth of the joggle to be formed are determined by the stroke of the press and the positions of the punch holders I2 and 3| relative to the positions of the die blocks 9 and 32. It is to be understood that the punch holders l2 and 3|, and the die blocks 2| and 32 are preferably in end to end contact with each other, and that the length of the joggle is determined by the distance that the holders l2 and 3| are offset with respect to the die blocks I9 and 32 as shown in Figure 2. During the down stroke of the punches 42 and 43, or the punch holder i2 when no punches are used, the action of the same 4 on the jaws 2| is to cause the latter to firmly grip the part l5, 3l, 44 or 45. On the up stroke, the springs 24 move the jaws apart, releasing the part held therein.

From the foregoing it will be apparent that various inserts may be interchanged and that such inserts require little if any machining. It will also be apparent that the stock may be fed into either end of the described assembly for forming either joggles. The material thus formed is drawn rather than compressed, with the result that the same does not wrinkle during the joggling operation. It is also pointed out that the insert material may be remelted and recast, thus effecting a substantial savings in material as compared with machined joggle blocks which must be discarded after the required number of specific joggles has been completed or the production item discontinued. Even though the die and punch inserts 40, 4|, 42 and 43 are of relatively soft material, the same may be used for long production runs by cutting off the adjacent ends of the same after the corners thereof are Worn, and then relocating the last parts to their previously described abutting positions.

The invention is not limited to the specific construction herein shown and described but may be made in many ways within the scope of the appended claims.

What is claimed is:

1. In combination with a die set including a die shoe and a vertically moveable punch plate thereabove, an off-set die assembly comprising: a pair of die blocks in end to end relation and having aligned channels therethrough, one of said die blocks being rigidly supported on said die shoe and the remaining said die block being resiliently supported thereon, cast inserts received within said channels of said die blocks, said inserts being shaped to flt at least two opposite surfaces of the production part to be acted upon, punch means rigidly supported by and beneath said punch plate and above said resiliently supported die block, and other punch means resiliently supported by and beneath said punch plate and above said rigidly supported die block, said channels in said die blocks being wedge shaped, jaws mounted for sliding contact with the sides of said wedge shaped channels, said cast die inserts being received within and supported by said jaws, and springs mounted on said blocks and arranged for moving said jaws upwardly along the referred to sides of said channels.

2. In combination with a die set including a die shoe and a vertically moveable punch plate thereabove, an oil-set die assembly comprising: a pair of die blocks in end to end relation and having aligned channels therethrough, one of said die blocks being rigidly supported on said die shoe and the remaining said die block being resiliently supported thereon, cast inserts received within said channels of said die blocks, said inserts being shaped to t at least two opposite surfaces of the production part to be acted upon, punch means rigidly supported by and beneath said punch plate and above said resiliently supported die block, and other punch means resiliently supported by and beneath said punch plate and above said rigidly supported die block, said die blocks and said punch means being respectively detachably secured to said die shoe and said punch plate by means of clamps attached thereto and arranged for longitudinally moving said die blocks and said punch means relative to th length of said channels.

:,evomo 3. In combination with a die set including a die shoe and a vertically moveable punch plate thereabove, an oil-set die assembly comprising: a pair of die blocks arranged in end to end relation and having aligned channels therethrough, clamp means longitudinally and adjustably securing said die blocks on said die shoe, one of said die blocks being rigidly secured to said die shoe and the remaining said die block being resiliently mounted thereon, cast inserts of low temperature melting metal received within said die blocks, said inserts being shaped to fit at least two opposite surfaces of the production part to be acted upon, punch means rigidly supported by and beneath said punch plate and above said resiliently mounted die block, and other punch means resiliently mounted on and beneath said punch plate and above said rigidly mounted die block.

4. A joggle die comprising a die shoe and a Vertically movable punch plate thereabove, wedge shaped channels supported on said die shoe and arranged in end to end relation with respect to each other, pairs of wedge shaped jaws received within said channels, resilient means positioned between one of said channels and the die shoe,

6 pairs of divided inserts shaped to engage opposite sides of the production part to be acted upon and respectively supported by said jaws, separate punches secured to said punch plate, said punches being positioned above the separate said pairs of jaws, and resilient means positioned between said punch and said punch plate in that portion of the die offset with respect to the iirst referred to resilient means. n

ALBERT V. MOWREY.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 276,111 Wilbur Apr. 17, 1883 1,697,947 Bunker Jan. 8, 1929 1,749,184 Hansen et al Mar. 4, 1930 2,141,736 Castle Dec. 27, 1938 2,310,498 Turton Feb. 9, 1943 2,433,808 Cadman Dec. 30, 1947 FOREIGN PATENTS Number Country Date 22.998 Short et al of 1896