SU1286429A2 - Press mould for manufacturing diamond tool - Google Patents

Abstract

The invention relates to the processing of materials by pressure, in particular to devices for pressing powder materials. The device allows to increase the service life of the tool, the quality of the products obtained due to the fact that after preliminary shaping of the workpiece with jars with forward dies, the second stage of deforming the semifinished product with punches with reverse dies occurs. Backstop combs finally form the products and separate them. 9 il.

Description

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The invention relates to the processing of materials by pressure and can be used in mechanical engineering for the pressing of articles of mainly diamond tools made of foam plastic, materials in the form of bars, segments, sectors, interconnecting rings, etc., and is complementary to the author. St. No. 960049.

The aim of the invention is to improve tool life and the quality of the products obtained by eliminating damage to the working edges of the punches.

FIG. 1 shows schematically a mold in the position of filling and prepressing the material being processed, general view; Fig. 2 is the same at the stage of separation and re-evaluation of products; on fpg. S - node I in figure 2; on fpg.4 - mold, top view; Fig. 5 shows a device for pressing with combs at the stage of dividing a lintel, an overall view; on fpg.6 - comb; 7 - additional comb; on Fig - node II PA figure 5; figure 9 - finished products.

The mold contains a team of two, consisting of a twisting ring 1. half-rings 2 and four inserts 3, lower 4 and upper 5 punches in the form of equal-height plates 6-19 p 20-33, respectively, combs 34 and 35, at the same time between the oppositely located working ends 36 of the plates 6,8,10,12,14,16 and 18 on the one hand and the ends of the 37 plates 21,23,25,27,29,31 and 33 on the other side of the punches 4 and 5, installed on the protrusions 38 of the combs 34 and 35, there is a gap / g, the value of which corresponds to the protrusions of the protrusions 34 and 35 relative to the size of the protrusion 39 additional combs 40 and 41 and are determined by the following relationship;

h1, 41

A4-B

I mm

correction factor; underpressure ratio binder, equal to 1.0-1.4; the upper limit of the grit of the diamond powder; bottom border of grit diamond powder.

The indicated dependence is obtained in an empirical way.

For pressing products, a pre-press 42 and an installation 43 punches, as well as a base 44, are used. 45 the working edges of the punches plates 6,8,10,12,14,16,18,21,23,25,27,29,31 and 33 are indicated. Position 46 denotes compressible products, position 47 denotes bridges between products.

The mold works as follows.

With the open cage 1-3 on the installation punch 43 lay out the lower punch 4 in the form of ravities plates 6-19.

5 Install the four inserts 3, half-rings 2 and clamp them with ring 1. Place the common hitch of the seals and fill them with a solid punch 44. Then, the upper punch 5, which also consists of equal height plates, is mounted on the pressed surface with a weakened sleeve. . Combs (forward stroke) 34 and 35 are introduced and incomplete separation and repressing of the products are made, maintaining a gap (jumper)

, value / g.

After the extrusion was finished (sintering), replacing the combs 34 and 35 of the forward stroke with the reverse combs 40 and 41, the plates of the punches are reversed by 0 magnitude / g, and, thus, the jumpers 47 in the rigidly closed compression chamber are broken. protection from damage of the working edges 45, after which the operation of pressing the mold elements is carried out.

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Claims (1)

Invention Formula Mold for the manufacture of diamond and tool, on the author. St. No. 960049, characterized in that, in order to increase the service life of the tool and the quality of the products obtained by eliminating damage to the working edges of the punches, it is equipped with additional interchangeable dies, while the protrusions of the latter are made in height with smaller protrusions of the existing dies. Backfill 1286429 Set of combs fiit Y ///// 7 //// ,. ifS 35 35 35 Separation and X doping (rig. 3 FIG. H dS 6 m 2h H6 46 t Srig. eight 39 phage. 7 FIG.