SU1284749A1 - Tool electrode and method of manufacturing same - Google Patents

Abstract

The invention relates to tool electrodes and methods for their preparation and can be used for the electrophysical treatment of difficult-to-work metals. The purpose of the invention is to improve the quality of the tool electrode. The electrode tool contains a metal disk, on the side surface of which there is a two-layer close-up consisting of a sublayer of a glass-cloth material and an abrasive-adhesive mixture containing 1 to 3 wt.% Silicon dioxide. The method of manufacture of elec. A tool tool involves annealing a metal disc at 800-850 ° C for 2 hours, cleaning the surface, applying an abrasive-insulating coating, and curing it under a draft of 2-5 kg / cm. Electrode tool ensures an increase in cutting speed. 2 sec. f-ly, 2 tab. 2 Il. (L with

Description

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The invention relates to the electrophysical treatment of metals, in particular, to electrode tools, and can be used for contact-abrasive cutting of difficult-to-work materials.

The purpose of the invention is to improve the quality of the electrode tool,

Figure 1 shows a part of the electrode-tool, section; figure 2 - diagram of the Assembly of the electrode-tool during curing.

The electrode tool contains (Fig. 1) a metal disk 1 made of sheet metal, an underlayer 2 of glass fabric mesh material or sparse glass fabric impregnated with heat resistant adhesive binder, an abrasive adhesive mixture 3 containing filamentary silica crystals in an amount of 1 3% by weight of binder. The coated disc is placed between plates 4 and 5 (FIG. 2), and pressure is applied to the top plate (4).

An example. A metal disk of 0 600 Mf and a thickness of 1.5 mm from Art. Z is subjected to complete heating up and holding at this temperature for 2 hours. Then the disk is cooled with the furnace to 200 ° C, then removed from the furnace and cooled in air . The surface of the disc is brushed and degreased before applying the composition.

in filamentous silica crystals. The mixture is applied with a spatula.

After applying the abrasive-adhesive mixture, the disk is placed between the press plates.

Curing of the compositions is carried out in the following modes. Composition 1: temperature 120 C; pinion time 10 h, pressure 0.4 MPa. Composition 2: temperature 20 ° С, holding time 72 h; pressure 0.3 MPa.

After the end of the process, the disc is removed from the press and passed for testing. The rest of the electrodes tools are made in a similar way. In an abrasive-adhesive mixture, only the content of silica silica filaments changes, leaving the remaining components in the amount specified for compounds 1 and 2. The temperature and curing time are kept constant, only the pressure changes.

Specific parameters of the process of manufacturing electrode tools are listed in Table 1.

Table 1

. Zino calosh, followed by drying for 30 minutes to completely remove volatile from the surface of the disk. Then, a glass fabric undercoat and an abrasive-adhesive mixture with filamentous silica crystals are applied to the surface of the disk.

As an abrasive adhesive base, take the composition 1, containing, mac.ch .: epoxy resin ED-16 100; maleic anhydride 30; N, N-dimethyl-g-phenylenediamine 0.2; quartz sand 15, and composition 2, containing, mac: epoxy resin ED-20 100; polyamide resin L-20 80, carbide cream or 20.

Abrasive-adhesive blends are prepared directly. Before being applied to the disc by mixing the starting components for 10-15 minutes, until a homogeneous pasty mass is obtained. When transferring to compounds 1 and 2, the required completeness is added31284749

Continued Table. one

four

Continuation of table 1

table 2

Claims (2)

From the data presented in Table 2, the formula of the invention shows that the proposed electrode-tool provides an increase in speed of 1. Electrode-tool, consisting cutting sprout 1.6 - 1.8 times, re-from a metal disk on the side 3 times work surface and surface improvement of which is done by cleaning the cutting surface by 2-cover from abrasive-insulating Grade 3 material different The fact that, with the aim of increasing the quality of the tool, the coating is made in the form of a sublayer of glass fabric material .-,. and the surface layer of an abrasive-adhesive mixture containing 1–3% of redox tempered aluminum oxide. 2. A method of manufacturing an electrode tool, including cleaning the surface of a metal disk, applying an abrasive-insulating coating and curing it, characterized in that, in order to improve the quality of the tool, before cleaning the metal disk is annealed at 800-850 ° C, and curing conducted under pressure of 2-5 kg / cm. / 2 3 FIG. Ф14г.2