SU1255414A2 - Grinding device - Google Patents

Abstract

The invention relates to mechanical engineering, namely to metal cutting, can be used for preliminary and final finishing in abrasive circles and is an improvement of the device according to the authors. St. No. 346099. The purpose of the invention is the expansion of technological capabilities. The device contains a grinding wheel 1, the working surface of which has areas with a coarse abrasive layer 4 and a fine abrasive layer 7. To implement consistent (preliminary and final) grinding, the coarse layer 4 is placed on the housing 3 of a magnetostrictive material that has a negative magnetostriction and reduces its dimensions in the radial direction during magnetization, and fine-grained abrasive layer 7 § (L S M

Description

1255414 is fixed on the inserts 6 of magnetogars, and the inserts increase their striction material, which has dimensions in the radial direction with positive magnetostriction, bl; 1 - magnetization, 2 Il.

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The invention relates to mechanical engineering, namely to metal cutting, can be used across all engineering companies for efficient finishing of workpieces with abrasive wheels, and is an improvement of the device according to aut. No. 346099,

The aim of the invention is to expand the technological capabilities of the device by combining the preliminary and final treatments.

Fig, 1 shows the proposed device; Fig, 2 - section aa in Fig about 1 about

The device consists of a pinch wheel 1 mounted on spins of a 2. Two. A grinding wheel consists of a body 3, filled with a magnetostrictive material, having a negative magnetostriction (for example, nickel), the body bears. coarse-grained abrasive layer 4, disk 5 with fixed inserts b of magnetostrictive material with positive magnetostriction (for example, from permendur K49F2 Ш1ИК65) with disks 5 and inserts 6 are fixed in the faceplate 10 and mounted on the spindle 2 of the machine. Magnetic, which serves to magnetize the housing Zy of the inserts b, is fixedly mounted on the grinding wheel 1T and consists of a core 12, made of fer omagnitnogo material and a magnetizing coil 13, isolated from the core of the gasket 14,

The device works in the following way.

When removing the main allowance (allowance for preliminary or final processing), grinding is performed by a coarse-grained layer mounted on an intermittent body 3 with modes corresponding to the preliminary grinding. At the same time, the working surface of the insert 6 with a fine-grained abrasive layer is at a certain distance from the working surface of the circle and does not touch the work surface of the workpiece. After removing the main part of the allowance manually or at a signal from the controlling device,

includes a magnetic system consisting of a core 12 and a magnetizing coil 13, with the result that the body radius of a magnetostrictive material with negative magnetostriction decreases (for example, a circle diameter of 250 mm u1 is less than about 4 microns) magnetostrictive material with a positive

magnetostriction increases (for example, with a circle diameter of 250 mm, the edge of the working surface of permendur KB5 inserts increases to 6 microns. On a radius), as a result

the remaining part of the allowance is removed by a fine-grained layer of inserts 6 with modes corresponding to finishing or finishing grinding. The amount of movement of the working surface

the body of the circle and inserts depends on the brand of the magnetostrictive material and the number of ampere turns of the magnetizing coil. After the end of the pshifovany cycle, the magnetic system is turned off, the circle body and inserts take on their original dimensions.

Radial feeding of fine-grained elements of the circle can be carried out either from the drive of the cross feed of the grinding machine or (micro feed) by changing the current in the magnetizing coil 13.

.Fore mule invention

The device for pshifovany on avt, sv. No. 346099, characterized in that, in order to expand technological capabilities.

the body of the circle is made of a material with a negative magnetostriction, and there is a coarse-grained abrasive layer on it;

in the case there are sector cut-outs

zy in which inserts inserted into the device are installed from a material with positive magnetostriction, bearing fine-grained

FIG. 2

Claims (1)

45 Formula of the invention The device for grinding by ed. No. 346099, characterized in that, in order to expand · 50 technological capabilities, the wheel body is made of negative magnetostrictive material, and a coarse-grained abrasive layer is placed on it, while sector-shaped cutouts are made in the body, in which are inserted into the device inserts from a material with positive magnetostriction, supporting fine-grained 5 abrasive layer.