SU514664A1 - Self-rotating cutter - Google Patents

Description

I

I The invention relates to the processing of metals by cutting, namely to a metal-cutting tool.

Known are round, self-rotating cutters, the axis of rotation of which is set at an angle not equal to 9 ° to the axis of rotation of the workpiece. During the cutting process, the component cutting forces cause such a cutter to rotate. However, the rotation speed of the tool is not stabilized and depends on many factors.

The purpose of the invention is to stabilize the scorpocTb of rotation of the cutter and to ensure the splitting of chips directly during the cutting process. IS

i This is achieved by the fact that on the back surface of a circular self-rotating cutter

I have inclined grooves,

 Fig, 1 shows the described cutter, 20

axial section; in fig. 2 - the same view in

I plan.

 Cutter 1, machining parts 2, mod-1tirovan on axis 3. Axis 3 na-radial

Prtschipniki 4 and 5 installed on the power-25

ke 6. On the rear surface of the cutter 1 there are inclined grooves 7.

When machining with this cutter, the material of the workpiece falling into the inclined grooves 7 causes the cutter 1 to rotate,

At the same time, between the speed of rotation of the cutter and the;

.

where and - the speed of rotation of the cutter, rpm; R

- cutting speed, m / min;

cut d

- cutter diameter, mm.

- total tilt angle of grooves

and in the cutting area.

To obtain the desired speed of rotation of the cutter 1, its axis is inclined in the plane, perpendicular to the main plane and parallel to the axis of the workpiece, determined by the angle La

B Vpei. tOOQit

where Q (is the angle of inclination of the grooves to the axis

cutter.

The inclination angle D of the grooves in the cutting zone is the sum of the algebraic sum of the inclination axis of the cutting axis and the angle Q t И. The ostaxchhies on the machined surface are thickened by grooves in the next turn of the workpiece. To do this, it is necessary that the trace of the previous groove does not coincide with the trace of the following. This is possible under the condition: i :() a arctff 3fD u-J. ... where X) is the diameter of the treated surface. t is the distance between smogkami cans, mm; . i- П - any natural number. The depth of the grooves 7 is greater than the thickness of the forming chips, so the grooves 7 are crushed chips into small sections of small length, convenient for transportation. Thus, this self-rotating cutter is in the process of cutting the grinding of the formers; shavings and can be used to process workpieces from baked materials. Formula and 30 bracing 1. A self-rotating cutter, the body of which is mounted on bearings in a bearing that differs from splitting the chip and stabilizing the growth of rotation of the cutter, grooves are made on its rear PS}, and its inclination angle is chosen depending on /. , U. MO) And the inclination of the axis of the tool along the vertical axis; d cutter diameter, mm; Yar - the speed of rotation of the tool, V - cutting speed, - i res. min; ABOUT ". the angle of inclination of the grooves in relation to the axis of the cutter, -. 2, a cutter according to claim 1, characterized in that, for improving the quality of the cutting, the total angle of inclination in the occupied zone C (V, is selected from the condition: - t (, 5). -.. D diameter of the treated surface, mm; t distance between adjacent grooves, mm; fl any natural number.