SU910401A1 - Abrasive diamond tool - Google Patents

Description

(54) / i-BRAZIVNO-DIAMOND TOOL

i,;.: ,,

The invention relates to the field of machine tools.

Known mechanical grinding wheel, comprising a housing, at the end of which are abrasive-containing bars, forming annular cutting and calibrating parts, and on the cutting part of the abrasive grit higher than the calibrating 1.

Such a tool does not provide the necessary quality and productivity of processing.

The aim of the invention is to improve the quality n processing performance.

To achieve this goal, the concentration of diamond in the working area is 2-3 times higher than in the calibrator.

FIG. Figure 1 shows a general scheme for two-sided grinding of the end face in porcelain fuse cases, as applied to the machine mod. 3344 HELL with the diameter of the feeding disc of 950 mm, the outer diameter of abrasive diamond wheels - 750 mm and the center distance of 615 mm; in fig. 2 shows the length of the working and calibrating parts in the section.

the surface of the face grinding tool, the passage of the grinding part in the grinding area, the size of the stock, the width of the part and the angle of inclination; in fig. 3 - intermittent execution of the working surface of the face grinding grinding machine.

During processing, the product 1 is fed at a speed of rotation Vj m / min of the disk 2 moving at a speed of V m / s almae 10 but an abrasive face grinding tool. In the grinding zone, the product passes along the inclined working part 3 of the circle, where the main section is removed, and with a calibrating parallel part 4 with

IS with a smaller grain size and concentration of diamond or abrasive produces final finishing of the end surfaces to the required quality. On the faceplate 5 there is a diamond abrasive continuous layer b or separate working elements 7.

The best cutting conditions for feeding S.i (2-3 m / min are provided if the angle of the angle of the working part is determined by the formula

)five

where p is the removed allowance;

D is the diameter of the workpiece.

In order to ensure that the individual points of the workpiece move along the calibrating part of the grinding tool and ensure uniform loading on the grains, the width of the calibrating surface is rationally set within (0.6-1.9) 0 to ensure one and the same trajectory

To increase the efficiency of the grinding process and the quality of processing, the granularity on the working surface is 2-3 times higher than the granularity of the calibrating surface, and the concentration is 1.5-2 to more.

With one-sided allowance for processing, taking into account the variation of the sizes of porcelain cases of fuses n 1.0 mm and the side length of the inclined surface of the tool 6 70-150 mm, the sine of the angle of inclination of the working part is

 TBTT - Creating small angles of inclination on the intake part reduces the load on individual diamond elements, which has a positive effect on the operation of the tool as a whole, as circle wear and roughness are reduced.

The invention provides an increase in productivity by 4 times and a decrease of 6pai: a by 3-5%. The economic effect in the processing of 20 million. porcelain cases per year will amount to 39.0 thousand rubles. in year.

Claims (1)

1. USSR author's certificate M 347186, cl. B 24 D 5/06, 1969 (prototype).