RU2000174C1 - Gang cutter - Google Patents

Abstract

Usage: in the field of metal cutting, in particular, on tool production and machine tool construction. The milling cutter is equipped with D parallelogram-shaped cutting inserts having a front surface formed by two pairs of flat sections that are inversely symmetrical with respect to the longitudinal axis of the housing socket, and the longitudinal and transverse front angles in the first section adjacent to the working end edge are smaller than the corresponding longitudinal and transverse front angles on the second flat section adjacent to the non-working end edge, and the line of intersection of said peripheral cutting edges of adjacent teeth, 4 il.

Description

The invention relates to the processing of metals by cutting and can be used in tool production and machine tool construction.

Milling cutters equipped with hard-alloy carbide cutting inserts are known.

A disadvantage of such mills is the need for regrinding of the cutting edges as they wear and the associated reduction in diameter and width.

Closest to the invention is a prefabricated milling cutter equipped with interchangeable parallelogram-shaped cutting inserts having two end and two lateral edges forming peripheral cutting edges of the milling cutter, mounted in housing slots providing mutual overlapping of cutting edges on adjacent teeth and secured by screws.

The prototype has the following disadvantages:

low productivity due to difficult chip control;

the efficiency of the cutting inserts is low, due to the non-optimal nature of their geometric parameters.

The essence of the invention lies in the fact that the combined mill is equipped with replaceable cutting inserts in the form of a parallelogram having two end edges and two sides along the edges forming the peripheral cutting edges of the cutter installed in the housings with mutual overlap of the peripheral cutting blades and secured by screws. moreover, the front surfaces of the cutting inserts are formed by two pairs of flat sections, inversely symmetrical with respect to the longitudinal axis of the socket in the housing. Moreover, the angle between the first flat section adjacent to the working

N3 O O O

xi.

about

the end edge of the cutting insert, and the supporting surface of the socket in the housing, measured in longitudinal section, is smaller than the angle between the second flat portion adjacent to the idle end edge and the supporting surface of the socket in the housing, measured in the same longitudinal section. Moreover, the values of both angles measured in the longitudinal section, increase in the direction from the peripheral cutting edge to the axis of the cutter, the angle between the first flat section and the supporting surface of the socket, measured in cross section, less than the angle between the second specified m flat portion and the support surface slot, measured in the same cross-section, the value of both angles measured in cross section, are increased in the direction from the end cutting edge along the cutter axis. The intersection line of said first and second flat sections is located outside the mutual overlap zone of the peripheral cutting edges on adjacent teeth x.

Figure 1 presents a General view of a precast cutter; FIG. 2 is a general view of the interchangeable cutting insert shown in FIG. 1; in Fig.Z - section aa in Fig.2; figure 4 is a section bB in figure 2.

The cutter assembly consists of a housing 1 with a shank 2 and interchangeable cutting inserts 3. having a parallelogram shape formed by two end edges 4 and two cutting lateral edges 5, and fixed in the housings of the housing 1 with screws 6. The cutting inserts 3 have a front surface formed by two pairs of flat sections 7 and 8, inversely symmetrical with respect to the longitudinal axis O -O1 of the socket in the housing. Tilt angles Utprod. and yinon. the first flat portion 7 to the support surface of the socket in the housing, measured respectively in the longitudinal and cross sections, is smaller than the corresponding angles. and X2pop. a second flat portion, measured in longitudinal and transverse sections. In this case, the angles U1prod. and u5prod. increase in the direction from the peripheral cutting edge to the axis

0-0 cutters, in yinon corners. and y2Pop. increase away from the end edges along the axis of the cutter. The line 9 of the intersection of the first and second flat sections of the front

Claims (1)

The surface is located outside zone I of the mutual overlap of the peripheral cutting edges 5 on adjacent teeth x. SUMMARY OF THE INVENTION parallelogram-shaped cutting inserts having two end edges and two side edges forming the peripheral cutting edges of the cutter installed in the housings with the possibility providing mutual overlap of the peripheral cutting edges on adjacent teeth x and secured by screws, characterized in that the front surfaces of the cutting inserts are formed two pairs of flat sections that are inversely symmetrical with respect to the longitudinal axis of the socket in the housing, while the angle between the first flat section adjacent to the working end edge of the insert and the supporting surface of the socket in the housing, measured in longitudinal seeding, is less than the angle between the second flat section adjacent to the non-working end edge of the cutting insert, and the supporting surface of the socket in the housing, measured in the same longitudinal section, and the values of both angles measured in the longitudinal section increase, for example occurrence from the peripheral cutting edge to the axis cutters, and the angle between said first section and the supporting surface of the socket in the housing, measured in cross section, is smaller than the angle between the second mentioned section and the supporting surface nests in the housing, measured in the same cross section, and the values of both angles measured in the cross section increase in the direction from the end edge along the axis of the cutter, while the intersection line of the said first and second flat sections is located outside the mutual overlapping zone of the peripheral cutting edges on two adjacent tooth x. Fs. 4 Fig.Z