SU1458171A1 - Method of machining spherical surfaces - Google Patents

Abstract

The invention relates to the field of abrasive machining and can be used in bearing production for machining spherical rings of spherical bearings. The aim of the invention is to improve the quality of processing the spherical rings of hinge bearings by ensuring the stabilization of the pressure force and the contact of the working surface of the tools with the work surface. This part is placed in a separator with alternating positions of their planes of symmetry, then normal to the average circumference of the annular track of the lower disk, then tangent to it. After the parts are installed, the upper presser disk is lowered, the required pressing force between the tools is created, and the machine is started up and fed into the abrasive paste processing area. 2 ill., 1 tab. (L

Description

one

The invention relates to abrasive machining and can be used in bearing spacing for machining spherical rings of hinge bearings.

The purpose of the invention is to improve the processing quality of the spherical rings of the spherical bearings by stabilizing the pressure and contacting the working surface of the tools with the workpiece surface.

FIG. 1 is a schematic diagram of a method for processing spherical rings; in fig. 2 - the position of the rings during processing.

Spherical rings 1 with an outer diameter d are placed in addition,

a disk 2 (separator) installed between the lower tool 3, having an annular track with a depth of AND, and the upper tool 4. In order to avoid mutual contact and jamming of the rings between the tools, an additional disk with concentrically arranged openings rotating at a speed equal to the speed of rings about the tool axis.

Ring processing is carried out on a ball-finishing machine with two tools, one of which has circular spherical tracks to accommodate spherical rings and rotates at a constant angle

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by speed. The other tool is stationary and also has spherical annular grooves of depth h, obtained by rolling with hardened steel balls when rolling both tools. - For stitching, 20-30 balls are used. µm is larger than the diameter of the treated: the cola is then treated with the same balls using an oil, for example, industrial oil of mark I12 GOST 20799-75. After rolling, the wigs unload, carefully machine the machine, then load the machined rings, providing the condition: Y oi, where Y is the angle formed by the intersection of the working surface of the tools relative to the center of the rings;

ω is the angle formed by the width of the ring relative to its center.

This condition is due to the fact that if the distance between the tools is greater than the width of the ring, then there is a probability that the part will leave the treatment area by the size of the gap 8 between the holes of the additional disk and the outer diameter of the part, resulting in a significant deterioration. the details.

The provision of this condition is promoted by placing the parts in the separator with alternating positions of their planes of symmetry I-I, then normal to the middle circle 5 of the annular track of the lower disk, then tangent to it.

In the case of a chaotic arrangement of the axes of the rings in the treatment area, the conditions for uniform pressure distribution of the working surface of the tool on the spherical surface of the ring are violated, and the dynamics of the part processing related to the relative speeds of the contact points of the rings on the working surface of the tool are disturbed.

After placing the parts in this way in the holes of the additional separator disk 2, the lower-upper tool 4 is lowered, which has the ability to move in the vertical direction. After creating the required force, pressing between the tools starts

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five

0

81

71

machine tool. During processing, the abrasive finishing paste is periodically poured. After finishing the ring processing, the machine is stopped, the upper tool is lifted and the finished rings are unloaded,

Experimental studies were carried out on an elevator-free ball coding unit. Mod. VSh-100. Rings from steel ShKh15, hardness HRC 62-65, diameter of rings 35 mm were subjected to processing. The number of simultaneously processed rings - 300 pieces. Processing modes: clamping force between the tools - ZON, the number of rotations of the lower tool is 31 rpm. Finishing paste is delivered every 3 hours to 300 grams. The processing time of one batch of rings is 8-10 hours. The removable allowance is 50-60 µm.

The test results for the known and the specified method are shown in the table.

Processing capacity, pieces / h

Geometric accuracy: Ovality, Gran.

500-600

1000-1500

45

50

55

Claims (1)

Invention Formula A method of processing spherical surfaces in which parts are placed in a separator between two tools. One of which is reported to have a rotational movement with the annular track, characterized in that, in order to improve the quality of the processing of the spherical rings, their separators are placed out of the condition of alternating the position of the plane of symmetry of the ring normally to the middle circumference of the annular track and tangent1} But. c / ez