RU1808662C - Method for machining convex curvilinear surfaces - Google Patents

Abstract

Usage: in particular when processing the working surface of the magnetic heads. The essence of the method: the method of processing curved surfaces with an abrasive tool is based on the rotation of the workpiece relative to the cutting plane along the curve of the rounding profile. The workpiece 2 is informed of the movement by swinging the spring loaded adapter 3 with the workpiece relative to the axis, the position of which is set by adjusting the stiffness of the elastic elements 4, for example, springs. The base 1 is informed of a movement perpendicular to the axis of rotation of the abrasive tool, and during processing, the adapter with the workpiece is pressed against the abrasive tool. 2 ill.

Description

The invention relates to instrumentation, in particular to a method by which the working surface of magnetic heads can be machined.

The aim of the invention is to expand the technological capabilities of the method by increasing the range of radii of curvature and reducing equipment conversion operations.

On Fig, 1 shows a diagram of the implementation of the method; Fig. 2 shows the position of the adapter when rocking.

The device according to the claimed method comprises a movable table - base 1. on which the workpiece 2 is mounted, with the help of adapter 3. The adapter is attached to the base 1 through elastic adjustable elements 4, between which the contactless preload device of adapter 5 is installed.

The method of forming a curved surface is carried out as follows.

Table 1 is set to reciprocate with respect to the non-contact loading device 5 (e.g., acting on the principle of aerostatic support) in the direction perpendicular to the axis of rotation of the abrasive tool. In this case, the place of application of the load P acting on the adapter 3 changes. As a result, the quantities (a

00

about

00

about with

Yu

possibly the direction of action of the reactions of the supports (Ri. Ra) arising in the elastic elements 4, realized, for example, by cup or other springs. A change in the reactions of the supports leads in turn to a change in the magnitude of the elastic deformations in the supports themselves. Thus, when the reciprocating table is communicated to the table, the swivel movement of the adapter 3 with the part 2 with the swing center at point 0 is also obtained (Fig. 2). The parameters of the adapter trajectory with the part (the radius of the trajectory R and the offset of the center of the circle relative to the middle of the adapter e) are determined by the formulas

L2 jrj2

P (J1 + J2)

L2- (J2-Ji)

2P (J1 + J2)

where L is the distance between the elastic elements;

ji and J2 are the stiffness of the first and second element, respectively;

R g is the force developed by a contactless loading device.

By the proposed method, both convex and concave surfaces are obtained by changing the direction of the action of the force P. For example, using attracting or repelling electromagnets with an adjustable magnitude of the magnetic flux. The minimum radius of curvature of the machined surface, for known parameters ji, J2 and L, is determined by the formula

RL2-JrJ2

(JrYi + J2 Y2) - (j2 + Ji)

where Y i and Ґ2 are, respectively, the maximum values of the compression of elastic elements, When

this, the greater the rigidity of the adjustable supports, the greater the radius of processing.

Thus, the claimed method allows processing surfaces of insignificant length (up to 1 mm) with large radii of curvature (of the order of several meters).

EXAMPLE. Based on the claimed method, the surfaces of parts were machined with the radii of curvature of the surfaces of 10 and 20 m. Moreover, helical coil springs with stiffnesses ji of 2.1-104N / mi 2 were used as elastic elements. 2 104N / mi distance between them 300 mm. With the force of the adapter adapter created by the electromagnet, 90H and 45H, the radius of curvature of the machined surface was 10 m and 20 m, respectively.

20 was carried out with a 50/40 grit diamond wheel at a cutting speed of 40 m / s and a table feed of 2 m / min.

Claims (1)

SUMMARY OF THE INVENTION A method for treating convex curved surfaces in which the abrasive tool is rotated, the part is mounted on the base and the swing motion is made along a curve corresponding to the profile being machined, 30 relative to the cutting plane and the reciprocating movement together with the base relative to the tool, and the part and tool pressed against each other, characterized in that 35 that, in order to expand technological capabilities by increasing the range of radii of curvature of the machined surfaces, the installation of the part on the base is carried out by means of a spring 40 of the adapter to it, the clamping force is applied to the adapter, and said reciprocating movement is carried out in a direction perpendicular to the cutting plane. T / // fi.1