RU1799716C - Method of hole machining - Google Patents

Abstract

Usage: the field of engineering, namely the processing of the internal surfaces of products such as shells. SUMMARY OF THE INVENTION: the workpiece is placed in the opening of the elastic diaphragms, after which they are supplied separately or together with air or liquid, as a result of which the article is clamped. Pressurized cutting fluid is introduced through an opening in the intermediate flange and poured out through corrugations in the elastic diaphragms to provide intense heat removal from the outer walls. 1 ill.

Description

The invention relates to the field of mechanical engineering, and in particular, to methods for treating the internal surfaces of articles of the sleeve type by grinding and lapping operations.

The purpose of the invention is to improve the quality of processing by intensifying the cooling of the outer wall of the preform.

This goal is achieved by the fact that the intermediate flange of the device used to implement the method comprises an opening for supplying pressurized space between the diaphragms and the coolant to be processed, which is then ejected through the holes formed by the corrugations and the wall of the processed product. At the same time, the coolant pressure supplied to the hole through the nozzle (Psozh.) Should not exceed the pressure of deformation of the walls of the product (Pkr.). At the same time, the pressure inside the diaphragm is increased by a value of Psozh., In order to prevent a decrease in the pressing force of the workpiece, and measures are being taken to increase the sealing of the flanges and joints between them.

The drawing shows a diagram of the implementation of the proposed method.

A device for implementing the method comprises elastic diaphragms 1 with corrugations that are fixed by means of flanges 2, in the walls of which there are holes for supplying liquid or gas into the space of the diaphragm - flanges. The flanges with diaphragms are interconnected by means of an intermediate flange 3. In the wall of the intermediate flange there is an opening 4, through which coolant is supplied under pressure

Ј

Vj

Yu Yu

VI s

R p - (L

g coolant - g cr - -

nEh3 12 (1 ") R3

where h is an integer;

E is the modulus of elasticity;

R is the radius of curvature;

h is the thickness of the material of the workpiece;

fi is the coefficient of the reduced length; which provides intensive cooling of the walls of the workpiece. In order to prevent leakage of coolant in addition to corrugation holes, measures are taken to seal the device, for which gaskets 5 are used.

The described method is implemented as follows.

After the device is installed on the machine, the product is processed, it is placed in the openings of the elastic diaphragms, after which air or liquid is supplied to them separately or together, as a result of which the product is clamped. Then, the coolant under pressure is supplied through the nozzle of the hole 4 and poured out through corrugations in the elastic diaphragms to the outside, providing intensive heat removal from the outer walls of the workpiece, which occurs in cases of honing products from hard-to-work materials (e.g. titanium alloys). The coolant, cooling the outer walls, is not contaminated, therefore, if it is poured into the workpiece, it can be used in addition to the coolant specially supplied inside the workpiece. After that, turn on the machine and the grinding and grinding work is carried out.

Using the described method improves the cooling efficiency

5

0

5

work product, creates the conditions for a favorable flow of the processing process, and therefore can improve the quality of processing of the product and productivity.

Claims (1)

SUMMARY OF THE INVENTION A method of processing holes in which a workpiece is placed in a clamping device containing elastic diaphragms with corrugations fixed in flanges connected to each other by an intermediate element, a hook is brought in and machined while cooling the walls of the workpiece, characterized in that that, in order to improve the quality of processing by intensifying the cooling of the outer wall of the workpiece, take the clamping device in the intermediate element which is made through a radial hole, and the coolant is supplied using the latter under pressure, the value of which RSW is determined from the following ratio Coolant (n2-1) Eh3 12 (1 - / g) R where n is an integer; E is the modulus of elasticity of the processed material; R is the radius of curvature of the workpiece; h is the thickness of the processed material; I is the coefficient of the reduced length.