SU1364446A1 - Method of finishing tapered surface of workpiece - Google Patents

Description

Phi2.1

with

The invention relates to a machine structure and can be used in the manufacture of parts with a precise conical surface.

The aim of the invention is to increase the machining accuracy due to the co-ordinated selection of tool sizes in the form of a truncated cone with a limited conical surface and its oscillation parameters along the generatrix of the conical surface of the part.

FIG. 1 shows a conical surface finishing scheme; 2 is a section A-A in FIG. one; in fig. 3 is a view B in FIG. one.

For machining on part 1 of a conical surface 2, pro 4A462 is used.

A fillet tool 3 in the form of a truncated cone, the conic surface of which is additionally limited by the i cutting plane passing through both bases of the imaginary truncated cone with a height less than the length of the surface to be machined and not intersecting the axis of this cone, and the distance between the axis of the cone and the track of the secant plane on a larger base, when processing the convex surfaces is zero, and for machining concave surfaces, it is chosen from the condition

b / 2ar, a. .

ten

15

and the width of the trace of the cutting plane on a smaller base is taken to be

K, sinVt (

2 kji- t oirj Sine / (signs

+ for convex surfaces, l concave surfaces);

y is the width of the track of the cutting plane on a smaller tool base;

X is the width of the track of the cutting plane on the larger base of the tool;

a is the instrument oscillation amplitude;

d is the angle of the tool cone; g, -. The largest radius of curvature of the conical surface of the tool, corresponding to the largest radius of the part; g l is the smallest radius of curvature of the conical surface of the tool;

b is the minimum distance between the axis of the cone and the track of the section plane on a larger base; SRI tool.

The treatment of the part 1 is carried out at oscillation of the tool 3 from the zone of full surface contact of its surface with the surface of the part towards the smaller diameter of the concave and larger diameter of the convex surfaces.

5 The tool is suspended, for example, using a parallelogram of leaf springs, the tool being pressed to the work surface with a force of 20-50 N, oscillation, produced at double speeds of 20 to 20Q per minute, and the part is rotated at a frequency of 20 100 min Processing with diamond paste for 10–30 min (depending on the quality of the pretreatment) ensures an accuracy of 0.1–0.5 microns and increases the percentage of usable parts to 90–100%.

0

Thus, by using a tool with a conical surface bounded by the specified dimensions and choosing the direction of its oscillation from the zone of full surface contact with the part towards the smaller diameter of the concave and larger diameter of the convex surfaces, an increase in the machining accuracy is achieved.

Claims (1)

Formula of about rete n i following the plane cut on the larger The method of finishing the conical surface for treating the convex parts of the part with a profile tool, with a limited conical surface, according to which the parts of the co-surfaces are zero, and for the treatment of concave surfaces it is chosen and where K is sin with / Jb 2 a- g four K - + (signs: a t + for tight surfaces - for concave surfaces); y is the width of the track of the cutting plane on a smaller tool base; X is the width of the track of the cutting plane on the larger base of the tool; a is the instrument oscillation amplitude; “- the angle of the cone of the part and tool; surface and its oscillation along the generatrix of this surface, about t l and To increase the machining accuracy, a tool is taken whose conical surface is additionally limited to a cutting plane passing through both bases of an imaginary truncated cone with a height less than the length of the surface to be machined and not intersecting the axis of this cone, and the distance between the axis of the cone and the base for processing the convex surfaces is zero, and for treating concave surfaces it is chosen from the condition f the largest radius of curvature of the conical surface of the tool, corresponding to the largest radius of the part; TC - the smallest radius of curvature of the conical surface of the tool; b is the minimum distance between the axis of the cone and the track of the cutting plane on a larger base of the truncated cone of the tool, -;,. in this case, the oscillation of the instrument is carried out from the zone of full surface contact of its surface with the surface of the part, towards a smaller diameter of the concave and larger diameter of the convex surfaces. FIG. 2 Type B i FIG.