SU1161343A1 - Method of dressing the teeth of cutting tool - Google Patents

Abstract

METHOD OF ROUNDING OF TOOTHS OF THE CUTTING TOOL, in which the grinding wheel rotates and moves the tool and the wheel in the radial direction 1 6 2/4/3 //, the grinding tool is rotated around an axis passing through the center of the apex rounding perpendicular to the front face of the tool, which differs By taking a cylindrical grinding wheel in order to increase productivity when machining the grinding cutter, the plane of rotation of the tooth is set below the axis of rotation of the grinding wheel and tilted at an angle of 15-25 ° & to the axis of rotation of the latter, while the processing is conducted by the periphery of the circle. (/) O5 00 4; oo

Description

The invention relates to the manufacture of metal-cutting tools, in particular to the sharpening of the rolling cutters, and can be used in the manufacture of tools intended for cutting gear wheels and parts with involute splines by the running-in method.

The aim of the invention is to improve the performance when machining the grinding tool.

FIG. 1 shows a device that implements the method of sharpening, a general view; in fig. 2 - a tooth of a grinding knife, a plan; in fig. 3 is a view A of FIG. one; in fig. 4 is a section BB in FIG. 3

A device that implements the proposed method contains a cylindrical grinding wheel 1, a tool 2 spindle with a nozzle 3 fixed on it, in which an end stop 4 and a screw 5 are located. The tool 6 spindle housing is mounted on a machine table (not shown) by means of a bracket 7 and axis 8 cylindrical hinge. On axis 8, a guide 9 is rotatably mounted, which cooperates with guides 10 fixedly mounted on the housing of the spindle of the tool 6. Parallel to the tool 2 spindle, the shaft 11 is mounted on the housing 6, on which the stop 12 and the toothed sector 13, which interact with the gear wheel 14, mounted on the spindle 2. In the groove of the nozzle 3 is inserted a tooth in the grinding knife 15 to the end stop 4 and secured with a screw 5.

The method of sharpening the teeth of the cutter is as follows.

The spindle body of the tool 6 is mounted on the table of a circular grinding machine (not shown) with a bracket 7, tilted relative to the axis O-O of the cylindrical grinding wheel 1 with a radius R at an angle of 15-25 ° and shifted

along the guide 9 to the distance H defined by the specified values of the rear angle at the apex o (b. The axis of rotation of the sharpened cutter O –O passes through the curvature center perpendicular to the front face of the cutter. Due to the inclination of the front face of the cutter 15 by an angle At 15-25 ° and its mixing by the value of Н in the section of the wheel 1 by the plane BB, passing through its front face, along the periphery of the grinding wheel, side cutting edges 16

and 17 cutting contour 18 are shaped according to the elliptic curves described by the equation

 ,

lI 1,

RVsin CI

R is the radius of the grinding wheel;

where is the angle of inclination of the front face of the cutter relative to the axis of rotation, j or the grinding wheel;

H

sinj 2 is the abscissa of the working section of the ellipse, which forms the main cutting contour of the tooth; оЬ - a back angle at verchiny; f is the radius of the rounding of the tooth tip;

-f I

-central angle

-projection of the lateral cutting edge on the big semi-axis of the ellipse;

Y - current values of coordinates. The area of the cutting contour 18, when the tooth is turned during the rotation of the cutter around the axis O-O, is outlined by an arc of a circle of radius r.

18

Fiz.g

VSL

FIG. B

J5

Claims (1)

METHOD FOR GRINDING TOOTHS OF CUTTING TOOLS, in which the grinding wheel is rotated and moved by the tool and the wheel in the radial direction, while the sharpened tool is rotated around an axis passing through the center of the tip aperture perpendicular to the front edge of the tool, characterized in that, in order to increase productivity during processing a cutter, take a cylindrical grinding wheel, the plane of rotation of the tooth is set below the axis of rotation of the grinding wheel and tilted at an angle of 15-25 ° to the axis of rotation of the latter, while m processing are the periphery of the circle. FIG. 1 SU .... 1161343