SU1764836A1 - Rotary cutter - Google Patents

Abstract

Use: metal cutting on lathe, milling and planing machines. SUMMARY OF THE INVENTION: The cutter comprises a holder with a guide element on which a cutting element in the form of a ring is mounted on the rotation bodies. The rotation bodies are embodied in the form of tapered rollers with cutting edges on a larger base, arranged with a thermal gap, between the ring and the guide element. 5 or

Description

The invention relates to metal cutting on lathes, milling and planing machines.

The aim of the invention is to increase productivity by improving chip breaking.

FIG. 1-3 shows the proposed cutter, side view, front and plan; in fig. 4 and 5 are diagrams for determining the intersection point of the resultant cutting forces with the plane of the centers of rotation bodies.

The rotary cutter comprises a holder 1, into which an axis 2 with a collar is pressed, having a threaded hole at the opposite end. The axle is fitted with a ring 3, a centering thrust bearing 4 and a supporting guide element in the form of a ring 5 of a tapered bearing, on which are tapered rollers 6 with cutting edges on a larger base that perform the functions of rolling elements. An outer bearing ring 7 bearing an edge centers the rolling bodies and rests on the thrust bearing. The ring 7 is reinforced and centered with the thrust bearing ring 4 by ring 8. The swing bodies are separated using a separator consisting of two sections 9 and 10 and a seal 11 fastened with a screw 12 The adjustment of the thermal gaps is carried out using a set of adjusting washers 13 and 14, located under the fixed bearing rings.

The end gap between the rollers 6 and the stop ring 15 is adjusted using a set of adjusting washers 16 and a replaceable washer 17 by unscrewing the bolt 18 and turning the hinge 19, pressed by screw 20. In the lower part of the cutter the seal is integral with the separator 21 of the thrust bearing 4.

The rotary cutter operates as follows. After installing the required rear angle a. and the angle A of the inclination of the cutting edge and the required cutting depths ti and g include the feeding of the lathe support. In this case, the rollers 6 cut into the workpiece and under the action of cutting forces RI and R2 (forming the resultant R, crossing the center line D0 at a distance a from the center of rotation of the tool) roll along the ring 5, carrying the outer blade-ring 7, which the turn also rotates under the influence of friction forces

with

with

vj About 4 00 WITH

about

The blades of the cutting blade exit periodically from the cutting zone and automatically chip breaks, and on the surface prepared for the finishing blade, chip separation grooves are cut, the parameters of which are determined by the angle 3 of the separation. As a finishing blade, the rolling bodies are used at the minimum angle / 5 separation. The rotational speed of the finishing ring 7 is always greater than the rotational speed of the rollers 6 due to the difference in the radii of the outer and inner circles of the ring,

and also thanks to the planetary movements.

Claims (1)

Claims of the invention A rotating cutter comprising a holder with a fixed guide element, on which a ring-shaped cutting element is placed on the rolling bodies, characterized in that, in order to increase the productivity due to the shavings of the chips, the rolling elements are made in the form of tapered rollers with cutting edges on large bases installed with a thermal gap between the ring and the guide element. yig.1 eight FIG. 2 FIG. if 5