SU1151436A1 - Method of finishing components - Google Patents

Abstract

A METHOD FOR MAKING DETAILS, in which the latter are placed between two lapings, and an abrasive slurry is supplied to the treatment zone, characterized in that, in order to improve the quality and productivity of the refining by feeding the slurry to the upper lap, it is fed to at least one stand, which is installed in the lower pripir, with its height being chosen within the range of 80-90% of the nominal value of the resulting size on the parts being processed.

Description

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O) The invention relates to abrasive machining and can be used in various industries of the national economy in fine-tuning parts made of steel, ceramics, hard metal, quartz, ruby, sapphire and other hard-to-work materials. A method of fine-tuning parts, in which the abrasive in the form of paste is known. It is ground on lap before starting operation tO. The disadvantage of the Ab-Razin method of feeding is the need, after some time of work, to stop the finishing machine, remove the upper lap and apply a new abrasive to the upper and lower lap. The closest to the invention of the UE is a method of two-sided processing of parts, in which the abrasive is fed to the lower grinding through special holes made on the upper grinding compound 23. A disadvantage of the known method is that when processing parts having a machined size of more than 3-4 mm, the abrasive slurry almost does not fall on the upper grinding, which does not allow for two-sided processing of parts, but also degrades the quality of the surfaces of parts in contact with the upper grinding, due to significant heating top with the shooting range and details. The purpose of the invention is to improve the quality and productivity of the finishing by feeding the suspension to the upper lap. This goal is achieved by the fact that according to the method of finishing the parts, the abrasive slurry is served on at least one support, which is installed on the lower pripire, and select its height within 80-90% of the nominal value of the resulting size on the parts to be processed. FIG. 1 shows a diagram of a device for implementing the method, front view; FIG. 2 - the same, sve xy; in fig. 3 — a support having a taper to its geometric center; in fig. A is a stand having grooves on the surface facing the upper lap. The device that implements the proposed method consists of a lower lap 1 and an upper lap 2 with machined parts 3 and flat supports A. They are located on the upper lap. There is a hole 5 in the upper priter for supplying abrasive slurry to the flat primer and on the flat stand 4. In the process of feeding abrasive , if under the hole 5 there is no workpiece 3 or stand 4, then the abrasive slurry falls on the lower ground 1. If under the hole 5 there is a stand 4, then the abrasive slurry falls on the surface of the stand 4, kaets on it and wets the surface of the upper lap 2. The stand 4, moving together with the parts to be machined 3, spreads the abrasive slurry along the surface of the upper lap 2. The opening 5 on the upper lap may not be, but in this case, the stand 4 must extend beyond the edge of the upper lap and abrasive feed performed at the point where the stand extends beyond the edge of the lap. The height of the stand is determined by the condition of good wettability of the upper abrasive abrasive slurry over the entire working area and throughout the entire processing time. These conditions are satisfied by the height of the stand within 80-90% of the nominal value of the size obtained on the parts being processed. In this case, a satisfactory wetting of the surface of the upper grinding in the initial period of processing and excellent wetting of the surface of the upper grinding in the final stage of processing, when the value of the processed size of the part is close to the nominal. In order to better hold the abrasive slurry on the surface of the stand, the latter can be made with a taper inward, and the value of the taper should not be too large, as this will lead to the flow of the abrasive slurry into the center of the stand. 11, the most optimal value of the taper of the surface of the stand lies in the range of 1–5 °, and with increasing viscosity of the non-abrasive component of the suspension,

the taper bar is reduced. The taper should be directed to the geometric center of the stand (Fig. 3). To improve the retention of the abrasive slurry, the stand may have special grooves (Fig. 4).

The supply of abrasive slurry can be done in doses and only at those times when the stand 4 is located at the place of supply of the abrasive. The abrasive dropped from the working surface of the upper grinding edge 2 also falls on the lower grinding edge 1. RasFig .1

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The course of the abrasive in this case is significantly reduced.

The proposed method is implemented when machining stainless steel flat parts with 24M28 abrasives. Parts height 10 mm. When processing were used duralumin stand height of 9 mm. This ensured an increase in the removal rate of the part material by a factor of 2.3 with the high quality of both machined surfaces of the parts.

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FIG. 2

Claims (1)

METHOD OF FINISHING DETAILS, in which the latter are placed between two grindings, and an abrasive slurry is fed into the treatment zone, characterized in that, in order to improve the quality and performance of finishing by feeding the suspension to the upper grinding, it is fed to at least one support, which is installed on the lower lapping, while its height is chosen within 80-90% of the nominal value of the resulting size on the workpiece.