SU1207574A1 - Die for making tubular billets - Google Patents

Description

The invention relates to the processing of metals by pressure, in particular sheet metal forming.

The purpose of the invention is the expansion of technological capabilities by obtaining hollow parts with a bottom part with a small radius of transition from the bottom part to the walls.

The drawing shows a die for forming tubular blanks with a longitudinal section.

The die for forming tubular blanks comprises an upper movable plate 1 with a punch 2 fixed on it and a fixed lower plate 3 on which a matrix 4 is mounted coaxially with the punch and concentrically placed in its cavity. a stepped mandrel 5, on which an elastic liner 6 is mounted. The matrix 4 is mounted on the bottom plate with the possibility of axial movement limited by the ring 7 mounted on the plate and fixing in the outermost position by means of an adjustable bar clamp 8. The matrix is spring-loaded relative to the 1THTH in the axial direction by springs 9. The elastic liner 6 is installed with a strain at a lower stage of the mandrel 5 and is made with a height smaller than the specified length by 0.5–1.0 in the diameter of the latter, facing the punch 2 con q elasticity Tsogoev vkladsh1a stands for end

s

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matrix 4 to 0.3-0.9 internal diameter of the latter. The matrix is made with a profile hole 10 on the side surface.

The stamp works as follows.

The original billet, for example, from an AM 2M 0 38x1.5 mm alloy and a length of 155 mm is placed in the matrix 4, in contact with the elastic insert 6, and deformed with a punch 2 rigidly fixed on the upper plate 1. When the punch 2 moves downward, crimping is performed the cylindrical part of the billet to its contact with a smaller step fixed mandrel 5. The end of the punch 2, touching the end of the matrix 4, locks its working part, and the stem of the mandrel 3 enters the hole of the punch 2, preventing the flow of the elastic insert 6 from the matrix 4.Further on, the punch 2 starts to compress the elastic insert 6, and the matrix 4 is lowered with the Preform until the latch 8 comes out of the groove located in the bottom plate 3, preventing the return of the matrix 4 to its original position. As a result of compressing the elastic insert 6, made, for example, from polyurethanes of the SKU-7 brand, the bottom of the workpiece is deposited and the hole is punched in its side wall.

Compiled by N.Pozhidaeva Editor O. Kolesnikova Tehred A. BoykoKorrektor L.Shshipenko

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92/9 Circulation 783

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Branch PPP Patent, Uzhgorod, Proektna St., 4

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Claims (3)

1. A STAMP FOR THE FORMATION OF TUBULAR Billets, comprising an upper movable plate with a punch fixed to it and a fixed plate on which a matrix is mounted coaxially with the punch, with a stepped mandrel concentrically placed in its cavity, on which an elastic insert is installed, characterized in that, for the purpose of expansion technological capabilities, the matrix is mounted on the bottom plate with the possibility of limited axial movement and fixation in the lowermost position by means of fixation elements, the mandrel is a larger step mounted on the bottom plate, and the elastic liner is fitted with an interference fit at the lower step of the mandrel and is made a height shorter than the mentioned step by 0.5-1.0 of the diameter of the latter, while the end of the elastic liner facing the punch protrudes 0.3 -0.9 of the inner diameter of the latter. 2. Stamp pop. 1, with the fact that the matrix is made with a profile hole on a side S3 surface. 3. Stamp pop. 1, characterized in that the locking elements in the lowermost position are made in the form of spring-loaded rod clamps mounted in the lower fixed plate. SU „„ 1207574 1207574 2