SU1357138A1 - Method of turning - Google Patents

Abstract

The invention relates to the field of machine tools and will find application in turning parts with a non-rotating tool with a radius at the apex. The aim of the invention is to increase the productivity of the method of turning with the forward and reverse course of the tool at a given height of asperities of the machined surface. For this, turning is carried out with a tool, the main and auxiliary cutting edges of which are conjugated with two circles of unequal radii whose centers lie on. right, passing through the center of the radius at the vertex. The machining of the part is carried out in two strokes of the instrumentation — direct and reverse. In the reverse course, the amount of the tool feed due to different values of the radius of its tip is designated increased. 5 il. CO SP oo 00

Description

one

The invention relates to the field of machine tools and will find application in turning parts with non-rotating tools on CNC walls.

The purpose of the invention is to increase productivity at a given height of asperities of the machined surface.

Fig. 1 shows a hole machining circuit for a forward tool stroke; figure 2 - the same, with the reverse course of the tool; Fig. 3 shows the processing scheme of a cylindrical part during the forward course of an instrument; figure 4 - the same, with the reverse course of the tool; Fig. 5 shows a tool for implementing the method. . The processing scheme according to the proposed method contains part 1, the axis of rotation of which coincides with the axis of the machine spindle, non-rotating tool 2. In addition, the diagram shows: DJ, - the main movement of the cutting; D - feed movement during reverse; - two-feed rate for direct running.

Part 1 is machined in two strokes with tool 2, the cutting edge, vABCD and radius

S

-i4sin g i-cos (sintl -ZR sin V-cosi / -2r sin if) i

2 if

(T.Bin-cosuisint / -2R, Rini / cosi -2r, sin c) -

2sin I /

- 4sin t; (, 4r sin

L

-4R, .r, .. R;)

where L / is the angle of the tool in the plan;

Hz is the radius of the auxiliary cutting edge, which performs turning during the return stroke of the tool;

R is the specified height of asperities of the treated surface.

Claims (1)

Invention Formula The method of turning with a non-rotating tool with a radius at the apex, according to which the turning is carried out in the forward and reverse course of the tool. 71 382 g in the section of the main cutting edge of the CLS and the angle in plan /, In the section BCD, the radius of the vergain is equal to r, the centers of the circle with radii r ,,, and r {h lie on one straight 00 passing through the center of the radius during rotation, those. circles I and M have a mating point B on the cutting blade, During the first run, the treatment is cut off with a blade bounded by the CAV section with the feed motion D g. When the tool is reversed, the feed motion Dj is given, the treatment is performed with an blade limited by the cutting edge portion BCD. The feed quantity due to different values of the tip radius is designated as enlarged. In the first stroke, the treatment is performed with a blade limited by a portion of the CAV with a feed motion Dj. During the reverse (finishing) stroke, the tool is given a motion D, and the processing is performed with a blade limited by the portion of the cutting edge BCD. The feed rate S for a given surface roughness R due to the different values of the radii r and r is chosen from the ratio five 0 five When assigning a feed size depending on a given height of microroughnesses, characterized in that, in order to increase productivity at a given height of asperities on the machined surface, the turning is carried out with a tool whose main and auxiliary cutting edges are matched with two circles of unequal radii, centers which lie on the straight line passing through the center of the radius at the apex, and the feed rate S during the return stroke is set by the ratio S - (4G {, cos f-2R Bin (/.cosy-2r.sin c)   sinf cos / -2R2sin4 cos / -. tf). 2s. -4sin tf (4r sin J -AR.r + Rj 4- r B. tool angle in plan; the radius of the auxiliary cutting edge, turning at reverse ftiZ.I Sp J d SI Fig.Z tool progress; R is the specified height of asperities of the treated surface. fuz.2 P, J l Rag. four FIG. five