SU931263A1

SU931263A1 - Method of producing spherical bottoms with wafer-like finning

Info

Publication number: SU931263A1
Application number: SU802989369A
Authority: SU
Inventors: Михаил Петрович Свешников; Михаил Захарович Фомин; Эдуард Леонидович Мельников; Виталий Николаевич Щеринов; Василий Семенович Головин
Original assignee: Предприятие П/Я М-5755; Предприятие П/Я В-8597
Priority date: 1980-10-08
Filing date: 1980-10-08
Publication date: 1982-05-30

Description

1one

Изобретение относитс к обработке металлов давлением, в частности к способам изготовлени сферических днищ с вафельным оребрением из листовых заготовок.The invention relates to the processing of metals by pressure, in particular, to methods for the manufacture of spherical wafers with wafer fins from sheet blanks.

Известен способ изготовлени днищ с вафельным оребрением из листовых заготовок, при котором производ т выт жку днища, после чего фрезеруют ребра по всему контуру f1J.A known method of manufacturing wafer-finned bottoms from sheet blanks, in which the bottom is stretched, after which the ribs are milled along the whole contour f1J.

Недостатком этого способа вл етс больша трудоемкость изготовлени днища, обусловленна тем, что кажда чейка вафельного оребрени получаетс механической обработкой.The disadvantage of this method is the great laboriousness of making the bottom, due to the fact that each cell of the wafer fins is obtained by machining.

Наиболее близким по технической сущности и достигаемому .результату к изобретению вл етс способ изготовлени сферических днищ с вафельным оребрением из листовых .заготовок , .при котором оформл ют оребрение и формуют днище. Оребрение выполн ют механической обработкой в плоскойThe closest in technical essence and the achieved result to the invention is a method of making spherical wafer-finned bottoms from sheet blanks, in which the fins are formed and the bottom is molded. The fins are machined in a flat

заготовке, а формовку днища производ т штамповкой t2. the blank, and the bottom is molded by stamping t2.

Недостатком этого способа вл етс низкое качество штампуемых деталей , обусловленное тем, что вафельное оребрение, выполненное в плоской заготовке, в процессе пластического деформировани искажаетс .The disadvantage of this method is the low quality of the parts being stamped, due to the fact that the wafer fins, made in a flat billet, are distorted during plastic deformation.

Цель изобретени - повышение качества штампуемых детс1лей.The purpose of the invention is to improve the quality of the stamped children.

toto

Указанна цель достигаетс тем, что в способе изготовлени сферических днищ с вафельным оребрением из листовых заготовок, 1ри котором оформл ют оребрение и формуют днище, This goal is achieved by the fact that in the method of manufacturing spherical bottoms with wafer fins from sheet blanks, in which the fins are formed and the bottom is formed,

Claims

The IS sheet preform is preformed into a hollow semi-finished product with a bottom thickness equal to the bottom thickness of the finished bottom and a wall thickness smoothly increasing 20 sec. on annular zones from the periphery to the center. FIG. 1 shows the initial blank, FIG. 2 - hollow semi-finished product, in FIG. 3 is a diagram of the molding of a bottom from a semi-finished product} in FIG. C ready detail. A device for implementing the method comprises a punch 1, a matrix consisting of a central 2 and a peripheral 3 parts and a heating element. The peripheral part 3 of the die also performs the function of a puller when removing the finished part from the device. The method is carried out as follows. Sheet blank 5 is molded (for example, by rotational extrusion on the rolling equipment) into a hollow semi-finished product 6 with a thickness S of the bottom part equal to the thickness of the bottom part of the finished bottom 7 and a wall thickness smoothly increasing from the bottom part to the periphery to Sfj. After that, a deforming force is applied to the outer part of the semi-fabrika, thereby producing simultaneously with the molding of the finished bottom 7 and the design of the ribs. In this case, due to the fact that the wall thickness of the semi-finished product 6 smoothly increases from the bottom to the periphery, a deforming force will be applied to the outer surface of the semi-finished product 6 along the annular zones from the periphery to the center. This leads to the fact that the deformation of the semifinished product 6 will not occur immediately over its entire surface, but gradually (sections) along the annular zones from the periphery to the 4th center, due to which better conditions for filling the ribs: large specific pressures are created in the peripheral part of the bottom 7 than in the central. Obtaining ribbing is possible both from the outside of the bottom and from the inside. The proposed method allows to improve the quality of the stamped parts due to filling the edges along the entire height and the absence of cracks and chips on them. 1 The invention The method of manufacturing spherical bottoms with wafer fins from sheet blanks, in which the fins are formed and molded at the bottom, in order to improve the quality of the parts to be stamped, the sheet billet is preformed into a hollow semi-finished product with bottom thickness 1 | equal to the thickness of the bottom part of the finished bottom, and the wall thickness, gradually increasing from the bottom part to the periphery, and the fins are made simultaneously with; forming the bottom by applying a deforming force to the outer surface of the semi-finished product along the annular zones from the periphery to the center. Sources of information taken into account during the examination 1. Melnikov, EL Cold stamping bottoms. M., Mashgiz, 1976, p. 972. Lyubchenko A.A. Designing dies and hot sheet stamping. iM., Mechanical Engineering, 197, p. 392393 (prototype).

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