SU1204286A1 - Die for making steeply bent branched parts of sheet bar - Google Patents

Description

 one

The invention relates to the processing of metals by pressure, namely to dies for the manufacture of bends for sheet blanks.

The aim of the invention is to improve the quality of manufactured products and the expansion of technological capabilities,

 FIG. 1 schematically shows a stamp, side view; fig 2 is the same cross section.

Shtlmp contains the matrix 1, the punch 2 with the upper plate 3, the gland device 4, made in the form of a set of plates with a thickness equal to half the difference of the width of the streams of the matrix and the punch. The plates are fixed on the top plate with screws 5 and springs 6,

The punch is provided with additional bending elements 7, conjugated with the end parts of the brook of the punch and made in the form of semi-cylinders with a length equal to the length of the arc L. The punch-forming punch, and the arrow of the arc L is equal to 0.35-0.40 g, where g - the radius of curvature of the punch-forming punch. The creek matri1TS51 is made with a depth H equal to 0.7-0.8 the width of the creek. 8 is the sheet blank in FIG. one

The stamp works as follows.

Sheet rectangular billet 8 with a thickness equal to the calculated thickness of the finished product, with the technological allowance along the edges, is laid on po042862

the surface of the die 1, With the working stroke of the press ram down the punch 2. first bends the billet into a half-cylinder with the help of bending elements 7, and with the further course of the punch down, the billet is bent in a different plane. In this case, the side walls of the billet are kept from loss of stability from the outside by

10 side surfaces of the matrix, and

from the inside - using the side surfaces of the punch 2, and at the same time. pressing and moving the metal from the sides to the zone of the largest

15 yarns of the product and keep from the appearance of local thinning and rupture with the help of clamping elements 4, which simultaneously hold the finished product. From shifting relative to the starting

20 donson.

Next, the slide moves back, the punch 2 with the pressing device 4 returns to its original position and removes the finished product from the die, while the pressing device acts as a part remover from the punch. The convex part of the outlet is stamped in a separate stamp from a sheet blank.

The invention makes it possible to expand the technological capabilities of the stamp, t, e, to stamp the concave half of the outlet from the rectangular sheet fold for one heat and the stroke of the slide.

thirty

35

press.

 - ig.1

U2.2

Claims (3)

1. A stamp for the manufacture of bent bends from sheet billets, containing a punch and a die with forming streams corresponding to the profile of the bend, characterized in that, in order to improve the quality of manufactured products and expand technological capabilities, the punch is equipped with additional bending elements associated with end parts the punch stream and made in the form of half-cylinders with a length equal to the length of the arc of the forming punch stream, and the arrow of the arc of the forming stream. the punch is made equal to 0.35-0.40 radius of curvature of the forming stream of the punch. 2. Stamp pop, 1, characterized in that it is equipped with a spring-loaded clamping device mounted concentrically to the punch with the ability to move in the axial direction and made in the form of a set of plates with thicknesses equal to half the difference in the width of the streams of the matrix and the punch. 3. Stamp pop. 1, characterized in that the forming stream of the matrix is made with a depth equal to 0.7-0.8 of the width of the stream. $ and. „> 12М286_