SU1454575A1 - Method of turning annular face surfaces - Google Patents

Abstract

The invention relates to mechanical engineering. The purpose of the invention is to improve the quality of processing ring-shaped end surfaces with several cutters due to the simultaneous start and end of work of all the cutters. The treatment was carried out with several incisors. One cutter, with a vertex installed in the main plane, processes an annular surface with a width of maximum width. Other cutters are installed with the displacement of their vertices from the main plane, which is chosen from the condition of ensuring equal working strokes of the cross feed of all the cutters and their dependencies are determined: I. 0.5, 25Df 0.25 (Dt where B; - offset height of the tip of the cutter, machining the i-th ring-shaped ends of the surface, from the main plane; B - the width of the ring-shaped face surface of maximum width; D. - the largest diameter of the i-th processed ring-shaped end surface; di - the smallest diameter of the i-th processed ring-shaped end surface. 3 ill. (O (/)

Description

one

The invention relates to mechanical engineering.

The aim of the invention is to improve the quality of processing annular end surfaces with several cutters due to the simultaneous commencement and termination of all the incisors.

FIG. Figure 1 shows the scheme on an expanding cantilever mandrel 2 in the spindle of a turning-milling semi-automatic machine, on the cross support 3 of which the cutting cutters 4, 5 and 6 are fixed. The largest diameters D-, machined with cutters 4, 5 and 6 annular end surfaces, are respectively D ,, D2 ,, and the smallest diameters d correspond to the method; in fig. 2 - type A d d ,, d2 and dj. The top of the undercut of FIG. one; in fig. 3 is a view B in FIG. one.

The method is carried out as follows.

The workpiece 1, which is a thin stepped ring, is fitted with an incisor 4, which processes an annular end surface of maximum width B (B ---

-) mouth15

poured in a horizontal plane.

They are cast on the expanding cantilever mandrel 2 in the spindle of the turning-multi-saw semiautomatic machine, on the transverse support 3 of which the cutting tools 4, 5 and 6 are fixed. D2 ,, and the smallest diameters d - of the corresponding cutter 4, processing the annular end surface of maximum width B (B ---

-) mouth15

poured in a horizontal plane.

the rotation passing through the axis is eagonal, i.e. along the line of the centers of the machine (in this case, the offset of the tip of the tool along the height H 0). The tip of the cutter 5 is set offset in height (up or down) by an amount H which is determined from the relationship:

2

H,

2,

D + d

- b

The crown of cutter 6 is also set with a height offset (up or down) by the value of Hj, which is determined from the relation:

J

2B

Dl

dl

, D.

2 2

- at )

The dependence is obtained geometrically from the condition that the working length of all the cutters be equal, i.e. their simultaneous start and finish. This means that when machined, the cross caliper is moved in the radial direction by feed S, the length of the working stroke of the cutters 5 and 6 installed with the offset Ng and Ne in height will be equal to the length of the working stroke of the cutter 4, i.e width In a ring-shaped face surface having a maximum width.

Due to the simultaneous commencement and termination of the work of all the incisors in the set-up, the deterioration of the quality of the treatment due to a change in the elastically-deformed equilibrium state is eliminated.

2 1

technological system due to the imbalance of the force factors acting in it.

Claims (1)

Invention Formula The method of turning ring-shaped end surfaces with several cutters, the top of one of which is installed in the main plane, and the tops of the others are installed at different levels from the main plane, characterized in that, in order to improve the quality of processing, the ring surface of maximum width is cut with a cutter, the top of which installed in the main plane, and the offset of the vertices of the other cutters from the main plane is determined by the dependence - J 2B Dl d .; Dt df - b where H is the height of the displacement of the tip of the cutter, processing the i-th annular end surface, from the main plane. bones; B - the width of the annular end surface of maximum width Di is the largest diameter of the i-th processed annular end surface; d {- the smallest diameter of the i-th treated annular end surface. Thebes. i Phie.1 Type B Phie J