SU1002066A1 - Female die for hot extruding of blanks - Google Patents

Description

The invention relates to the processing of metals by pressure.

A corrosive matrix for hot pressing of blanks, including a holder, a porous intermediate sleeve and a mineral-ceramic insert til The disadvantage of the known matrix is low resistance due to reason. frequent damage inserts ceramics CM-332.

The solution that is closest to the described technical essence and the achieved result is |; {latrix for hot pressing of the blanks, including a holder, an intermediate sleeve and a ceramic working insert C2 placed in it}.

 The disadvantage of the matrix is also low resistance, due to the fact that when the pressostat is separated, the insert is pulled out of the intermediate sleeve due to the low frictional forces between the CM-332 mineral ceramic and the intermediate sleeve. An increase in tension between the intermediate sleeve and the minera-ceramic working insert leads to the formation of cracks in the latter.

The aim of the invention is to increase the durability of the matrix.

The goal is achieved by the fact that in the matrix for hot pressing of blanks, including a holder, an intermediate sleeve and a ceramic working insert placed in it, the latter is installed in the sleeve with a gap, and the interface of the insert and sleeve is tapered with the top of the cone facing in ,

10 opposite to the direction of pressing.

The drawing shows the matrix fe: cut.

The matrix consists of a holder 1, a working barrel insert 2 and an intermediate sleeve 3. The outer surface 4 of the working insert is made along a cone. A cone is used to make a hole 5 of the intermediate sleeve 3. The sleeve is made of heat-resistant steel ZH2V8F from a working insert made of mineral-ceramic CM-332, the intermediate sleeve is made of brass or bronze.

The working insert is installed in the intermediate sleeve with a gap of 0.125 0.5 mm ..

Vervina of the cones of surfaces 4 and 5 are turned in the direction opposite to the direction of pressing. The angle at the top of the cones is 15

Claims (2)

30 The matrix works as follows. Before the start of operation, the matrix is heated in the furnace to 500-600 ° C and then installed in the matrix holder 1 of the press (not shown). During hot pressing, the intermediate sleeve 3 contacts with the heated metal to soften, under pressure of pressing, precipitates, selects the gap between surfaces 4 and 5 and compresses the working insert 2 with a pressure equal to the pressure of the metal to be applied to the intermediate sleeve 3. Compressed The billet, deformed by the pressure of the press, passes through the hole in the working insert 2. At the end of pressing when separating the pressostat, the working insert 2 is not pulled out of the intermediate sleeve 3, as it is tightly clamped by the horse surface 4 and 5. After removing the pressure chamber, the die is ready for subsequent hot pressing. The matrix can also be used for hot pressing of blanks from powder. Example. Brass of the L63 grade was pressed; the diameter of the output opening was 10.2 mm. As a blank, L was used; a brass bar of Ø 170 height 380 mm. The durability of the die was 60-100 compacts versus 10-15 compacts existing. The annual savings from the introduction of the described matrices with a mineral-ceramic insert will amount to 78 thousand rubles. DETAILED DESCRIPTION OF THE INVENTION Matrix for hot pressing of blanks comprising a holder, an intermediate sleeve and a ceramic working insert placed therein, characterized in that, in order to increase the durability of the die, the working insert is installed in the sleeve with a gate, and the mating surfaces of the insert and sleeve are conical with the top of the cone facing the opposite direction to the press. Sources of information taken into consideration during examination 1.Authorial certificate of the USSR) 1 697360, cl. From 25/0, 1980. 2. Authors certificate of the USSR 633634, cl. B 21 C 25/02, 1978 (prototype). J / j cfrf fff f / ftfe If / J / ffce & Ajifftfjf