SU975378A1 - Abrasive tool - Google Patents

Description

(5) ABRASIVE TOOL

one

The invention relates to metal cutting and can be used in the finishing processing of cylindrical parts on grinding machines.

An abrasive tool is known, comprising a housing with three abrasive wheels fixed on it, arranged to regulate the distance between them. 11.

The disadvantages of the known abrasive tool are low productivity due to limited cutting conditions due to the occurrence of Vibration of the workpiece due to the one-sided directionality of the cutting forces, as well as the low quality of the workpiece.

The purpose of the invention is to increase productivity and quality when machining non-rigid cylindrical parts.

This goal is achieved by the fact that in a known abrasive tool extreme abrasive wheels are made with elastic butt-shaped work surfaces located oppositely.

FIG. 1 shows an abrasive tool, a longitudinal section; in fig. 2 shows a section A – D in FIG. one.

ten

Abrasive tool contains mandrel 1, on which washer 2 with the help of screws 3 is fixed abrasive wheel 4 with peripheral working

15 surface 5, filled the radius of the workpiece 6.

On the mandrel 1 at both ends of the abrasive wheel 4 there are opposed elastic circles 7 with elastic end face surfaces consisting of flanges 8, in the recesses of which abrasive petals 9 are fixed.

In the grooves of the flanges 8 and the mandrel 1 are installed crackers 10 and 11, secured by means of covers 12 with screws 13

Seals H are installed in the flanges 8 and the covers 12, protecting the internal cavity of the mandrel 1 from dust.

In the inner cavity of the mandrel 1, an adjusting screw 15 is located coaxially with it, with right and left threads passing through the corresponding threaded holes of the crackers 10 and 11 and mounted in the sleeve 16 fixed in the mandrel 1 by a retaining ring 17.

The adjusting screw 15, on the one hand, rests with its shoulder into the sleeve 16, and the other side with a conical surface into the sleeve 18, which is pressed against the elastic ring 19.

On the mandrel 1 there is a taper bushing 20 with a thread 21 for mounting and securing the tool in the machine spindle.

Abrasive tool works as follows.

The elastic circles 7 with the face working surfaces by rotating the adjusting screw 13 are set at a distance smaller than the diameter of the workpiece by a certain amount of tension.

The tool is associated with rotation and is fed to the upper part of the rotary part until the abrasive disk's circumferential surface 5 touches it, after which it is fed to the grinding depth and the longitudinal feed of the workpiece.

While the end surfaces of the elastic circles 7 due to

The pre-set tension covers the side surfaces of the workpiece 6, simultaneously with grinding the periphery of the abrasive wheel and polishing the sides of the part 6, thereby creating lateral supports, which leads to vibration damping and allows for increased cutting conditions.

Improving the quality of the machined surface of the part 6 is associated with an increase in each time the number of abrasive grains participating simultaneously in the work, and their different direction of movement leads to the creation of a fine mesh on the surface that improves the cleanliness of the surface layer.

By changing the grit of the abrasive disc A and the face elastic circles 7 and the establishment of optimal cutting conditions with a tool, one can achieve high productivity and quality of processing.

Claims (1)

Invention Formula An abrasive tool comprising a body with three abrasive wheels fixed on it, arranged to regulate the distance between them, characterized in that, in order to improve the quality of processing, the extreme abrasive wheels are made with elastic face working surfaces located oppositely. Sources of information taken into account in the examination 1, USSR inventor's certificate No. 529068, cl. In 2 D 5/06, 197. P1U