Патент USA US2113250код для вставки
April 5, 1938. E. M. cAR'rwRlGHT 2,113,250 METHOD OF FORMING REDUCING Tì’S Filed Aug. 18, 193'? @if 5 Shee'ts-Sheet l „iw April 5, 1938. 2,113,250 E. M. CARTWRIGHT METHOD OF FORMING REDUQING T’S ' Filed'Aug. 18, 1957 3 _Sheets-Sheet 2 \ O/.le 30 K // \\ April 5, 1938. lE; M. CARTWRIGHT 2,113,250 METHOD OF FORMING REDUGING T’S _ Filed Aug. 1S. 1937 ' _ s sheets-sheet s ¿2kg/0, a W %/Jllll J; È /27 ë un - i ff ' - “à Ñ SÉ? zw 2,113,250 Patented Apr. 5, 1938 UNITED sTATEs PATENT or-'FlcEÄ :413,250 METHOD or mamma _nEnUc‘rNG-T’s Eugene M. Cartwright, Narni wœdbury, om., assigner to Cline Brau Q Copper Co. Incorpo rated, Waterbury, Conn., a corporation of Connecticut Application Anm: 1s, i937, serial No. 159km 5 Claims. This invention relates to improvements in methods of forming reducing-T’s. One object of this invention is to provide an :u improved method of forming reducing-T’s with greater speed and consequent less cost. Another object of this invention is to provide an improved method of making reducing-T’s by parts and steps are identiiied by specinc names for convenience, but they are intended to be as generic in their application as the prior art will permit. Referring to the drawings, the cup-shaped blank 20 shown 'in Fig. 1 may be produced in any suitable way, and is subjected to a series of op which a reduced terminal of the T can be given erations to reduce it to the T-shaped form of a greater reduction atv a single operation. the blank 2| shown in Fig. 2. In performing this A further object of this invention is to provide > series of operations, the lower end 22 of the blank 10 10 an improved method of forming reducing-T’s `2|l is given a series of bulging-out operations, as without distorting the T’s out of shape due to the indicated by the broken line 23, and the blank strain they are subjected to. -is shortened as indicated bythe broken line 24. With the above and other objects in view, as This series of operations for changing the blank 2lil into the blank 2| may be performed in ac 15 15 will appear to those skilled in the art from the present disclosure, this invention includes all cordance with the disclosure of the application features in the said disclosure which are novel Serial No. 141,936 of Franz B. Wendel, tiled May over the prior art. 11, 1937, or the blank 2| may be produced in any In the accompanying drawings, in which one other desired or known way. 'I'he blank 2| next way is shown for illustrative purposes: has its end-wall 25 cut oiI _ and has the thus Fig. 1 is an elevational view partly in section opened run-end reamed out to produce the T 20 of a cup-shaped blank for use in making the T blank 26 of Fig. 3 ready for operation in accord shaped blank from which the reducing-T is to be ance with the present invention. made: ~ 'I'he press 21 has a press-bed 28 and a pair of Fig. 2 is a view in elevation and partly in sec spaced-apart upright-guides 28. The top or head 25 tion of the T-shaped blank before an end-wall of the press is not shown. - A die-bed 3|) is ñxedly has been removed; n mounted upon the press-bed 28 in any suitable Fig. 3 is a view similar to Fig. 2 with one end manner. Resiliently yieldable means, such for wall removed from one of the run-tenninals to example as an air cylinder pad 3| is located in an opening 32 in the press-bed 28, and is normally 30 form the- T-blank; Fig. 4 is a view similar to Fig. 3 after the closed forced `upwardly against the bottom o'f the die bed Why a piston (not shown) of an air cylinder end run-terminal has been reduced; Fig. 5 is a view similar to Fig. 4 of a ñnished (not shown) which is normally in communication male reducing-T after the end of the reduced run with a source of supply of compressed air. A mandrel 33 has a iiange 34 enga-ging against 35 35 terminal has been removed; Fig. 6 is a view similar to Fig. 5 after all the the die-bed 30 and a screw-threaded ‘shank or » terminals have been expanded to finished form to tang 35 screW-threadedly engaged in a threaded form a female reducing-T; hole in the die-bed 38. A backing-sleeve 36 is Fig. '1 is a view in elevation of a portion of one slidably mounted upon the mandrel 33 and has a base 31 normally resting upon a plurality of 40 40 form of press and die construction for carrying out the present invention, with the T-blank thrust-rods 38, preferably four in number, which ~ shown in Fig. 3 omitted; ` rods 38 extend through holes 39 in the die-bed 30 Fig. 8 is a sectional view taken on the line 8_8 and rest against the top of the air-cylinder ` of Fig. '7 with the T-blank of Fig. 3 in position for pad 3|. The mandrel 33 has air-relief hole 40 which in 45 4.5. the reducing operation; Fig. 9 is a view similar >to Fig. 8, with the parts -tersects a. transverse air-relief hole 4| which by of the press andA die at the end oi' the reducing connection through fiat portion» 44- is able to re operation; lease air through one or the other of holes 42,` Fig. 10 is a view similar to Fig. 8, with the parts >43, depending upon the position of sleeve 36 rela tive to mandrel 33.l Cross-bars 45 are secured to 50 50 of the press and die returned to their initial po sition and with the reduced-T blank ready for the uprights 23, and abutments 46 are adjust removal; and y Fig. 11 is a transverse sectional view taken on the line II-II of Fig. 10. In the description and claims, the various 55 ably'threadedly secured to the bars 45. The slide 41 is mounted to slide in the uprights or guides 29, and the closing-in or reducing-die 48 is secured to the under side of the slide 41. I 2 2,113,250 The'slide 41 has a central hole 49 intersected by a slot 50 which extends across through the slide 41. The reducing-die 48 has a central hole 5l with an annular chamfered entrance 52 leading UJI thereto. A knock-out or knock-out plunger 53 is slidably mounted in the hole 5| and has a shank 54 detachably connected by a screw 55 to a plug 56 which slides in the hole 49. The knock out bar 51 extends transversely through a hole 10 58 in the plug 56 and may be ñrmly secured there in, the opposite ends of the knock-out bar 51 being in position to engage the abutments 46. In carrying out the method of making a, reduc ing-T in according with the present invention, 15 a,> T-blank of the form shown at 26 in Fi'g. 3 has its open run-end 59 placed down over the ` ` second terminal and add at least a portion of the material of the said end-wall thereof to the re duced tubular side-wall; and opening the end oi.' i the now reduced second terminal of the T-blank. 2. The method of forming branch pipe-fittings Cil having run-portions reduced at one end, com prising: preforming a branch pipe-fitting blank with open and closed run-ends; concentrically arranging on a mandrel sized to correspond to the desired reduced~ run-end, the run-portion `of said blank with the closed end thereof sup portably engaged by the end of said mandrel; subjecting the closed run-end thus supported to a drawing-down operation acting initially on the closed run-,end to draw down a peripheral por tion of the end-wall thereof into conformity with mandrel 33 and backing-sleeve 36, as shown in the mandrel; extending the drawing-down op Fig. 8, with the branch end 60 extending out eration along said mandrel to progressively re transversely from the backing-sleeve 36 and duce the closed run-end and merging the drawn down peripheral portion of said end-wall there 20 20 the mandrel 33 and with the closed end-wall 6! with; supporting the diminishing unreduced run engaging over the upper end of the backing sleeve and mandrel. The press is then put in portion of the pipe-fitting blank concentrically operation to bring the slide 41 and the closing- i with respect to the mandrel'during the continu in or reducing-die 48 downward, the closing-in ance of the drawing-down operation; and sever ing therequired amount from the outer end of 25 25 die engaging and reducing the closed run-end 62 by forcing thevbacking-sleeve 36 to retire against the reduced run-end to render it open and of the desired length. o ' the resistance of the air-cylinder pad 3l con 3. The method of forming branch pipe-fittings comitantly with 'the advance of the closing-in die 48 to the position shown inFig. 9. The press _with reduced and unreduced run-ends, compris ingzApreforming a branch pipe-fitting blank with 30 is then reversed to raise the slide 41 and the closing-in die 48, whereupon `the backing-sleeve a run-portion of uniform diameter from end to 36 is forced upward by the air-cylinder pad 3l end and with an end-wall on one of the run to thus strip the reduced T-blank 63 0E of the mandrel 33. The continued upward movement 35 of the press-slide results in the knock-out bar 51 striking the abutments 46 and forcing the knock out plug 53 downward and thus, in the event that ends thereof; concentrically arranging the run » the reduced run-end 65 frictionally adheres with in the opening 5i of the closing-in die 48, forces 40 the reduced run-end 65 out of the opening 5l in the closing-in die 48. `The reduced end-wall 64 of the reduced run-end 65 of the reduced T blank 63 (Fig. 4) is then cut oil to produce `the male T shown in Fig. 5 which may be used as 45 »thus shown when this T is to be used to have the run and branch ends inserted in the ends of pipes for connection thereto. Where, however, the connection with pipes is to be made by having the pipe-end inserted into-the _run and branch portion of said blank on a mandrel sized to cor respond to a desired reduced run-end with which the pipe-fitting lis to be provided and with said end-Wall in engagement with the end of said mandrel to support the blank from endwise dis placement on the mandrel; interposing a yield ably-mounted backing-sleeve between said man drei and said run-portion of the blank with its outer end in engagement with said end-wall; applying to said end-wall a reducing die sized to correspond to the desired reduced run-end, to the end-wall at the outer end of said run-portion, whereby a portion of said end-wall is converted into a reduced side-wall; moving the reducing die axially along the mandrel and forcibly receding the backing-sleeve as the reducing action con to the female form shown in Fig. 6 by suitable tinues; and in severing an end portion of the re duced run-end therefrom to render it of prede expanding operations. termined length. 50 ends, then the run and branch ends are enlarged - The invention may be carried out in other specific ways than that herein set forth without 55 departing from the spirit and essential charac teristics of the invention, and the present em bodiment is, therefore, to be considered in all respects as illustrative and not restrictive, and all changes coming within the meaning and 60 equivalency range of the appended claims are intended to be embraced therein. I claim: y 1. The method of forming reducing-T’s, com prising: providing a T-blank having a run-por 65 tion and a branch-portion leading from the said run-portion intermediate the opposite ends ' 4. The method of forming a branch-fitting having a run-portion comprising unreduced and reduced run-ends, comprising: preforming a branch-fitting blank with the run-end to be re duced at least partly closed by an end-wall; concentrically arranging the run-portion of said blank on a mandrel sized to correspond to the desired reduced run-end by means of a backing sleeve; placing said run-portion of the blank to be supportably engaged by the end of said man drel to be held against axial movement thereon; applying a reducing-die sized to correspond to the exterior surface of the desired reduced run end to the supportably-engaged run-end to draw down at least a. portion of said end-wall into thereof, the said run-portion including a ?rst ter minalghaving a tubular side-walllwhich is open at conformity with said mandrel; moving said draw its end and a second terminal having a tubular die along said mandrel to merge said end-wall 70 side-wall and an end-wall extending inwardly portion in the reduced run-end; continuing the from the said side-wall; supporting the T-blank . drawing-down operation while causing the back ing-sleeve to recede in synchronism with the ad by means of the end-wall of its said second ter minal and subjecting the said second-terminal vance movement of the draw-die whereby the of the T-bla-nk to a forming operation to reduce pipe-ñtting blank is increasingly spaced from the diameter of the tubular side-wall of the said the aforesaid end-wall to accommodate the elon 45 2,113,250 gation of the run-end during its reduction; and operation on the mandrel to reduce its diameter » in severing the outer end-portion from the re duced run-end to render said run-end of prede while incorporating in the reduced tubular wall thereof at least a portion of the said transverse Wall; centering the run-portion of the'T-blank and supporting the diminishing unreduced re Ul mainder of the run-end being reduced by means termined length. Ul 3 5. The method of forming reducing-dies, con sisting in: forming a T-blank with one of its run-ends open and with the other of its run ends, at least partly, closed by a transverse Wall; placing the run-portion of the T-blank over a 10 sizing mandrel with said transverse wall in en gagement with the end of said mandrel to pre of a backing-sleeve slidable‘ on the sized outer wall of the mandrel and displaceable by the draw ing operation, and in severing the outer end of the reduced run-end therefrom to render the 10 run-end of predetermined length. vent axial displacement thereon; `subjecting the run-end with the transverse wall to a drawing EUGENE M. CARTWRIGHT.