SU318205A1 - DEVICE FOR CUTTING OF CUTTING TOOLS - Google Patents

Description

The invention relates to the field of machine tools, in particular, to walls for grinding cutting tools having the form of a tape.

A device for sharpening cutting tools, which is included in an automatic line, contains two grinding wheels with screw cutting, the axes of which are parallel to the movement of the cutting tool to be sharpened in its path, and a mandrel for guiding the edge of the cutting tool.

A disadvantage of this device is that a relatively small sharpening angle is obtained at the ends of the pointed edges, which reduces the quality of the cutting tool, and therefore an additional operation is required.

The present invention differs from the known one in that two grinding wheels having the shape of a truncated cone are set at an angle to the direction of movement of the cutting tool to be ground. This angle can vary in a significant range, but it has been found that an angle of about 5 ° gives preferential results.

Tips with edges that are honed to form a convex surface can be measured, for example, by changing the length or diameter of the circles or changing the orientation of the axes of the circles. The range of the angle obtained in practice is 60 ° at the entrance of the semi-angle, to 0 ° at the exit of the semi-angle.

FIG. 1 shows a sequential processing circuit for a tape; in fig. 2 shows the layout of two screw grinding wheels relative to the tool to be ground (top view); pas figs. 3 - grinding wheels for final honiogon, side view; in fig. 4 - the same view

from the butt; in fig. 5 shows the outlines (enlarged 2400 times) in the usual manner of the sharpened edges of the razor blades and the edges of the razor pointed in accordance with the invention; in fig. 6 is a diagram illustrating the preferred shape of the contour and circle settings for final honing and.

The razor tape 1, which is a continuous tape of the same width, is preliminarily polished at position 2 with two grinding wheels 3 installed on axis 4, and pre-honed at position 5 with two ho iting circles 6. After that, the tape is fed at position 7

Sonic honing wheels S mounted on the axles 9. The razor belt i is driven by the output and input rollers 10.

The peripheral surface of each honing wheel 8 has a helical helical shape, defined by a series of strips 11. These circles are set so that the strips are inserted (interlocked) and form the grip 12, through which the ribbon passes (see Fig. 4).

FIG. 6 shows a schematic of the geometry of one of the circles 8 relative to the edge of the belt 1. Here: 13 is the large (or input) circle of the circle 8 of the final honing; 14 - its circumference is small (or output); 15 - intermediate circle; 16 - spindle axis 17; point A is the position of this

axes in the longitudinal direction at the input kienz of the honing wheel; B - the position of this axis at the output end of the circle.

Preface c o lO b rete n u

A device for sharpening cutting tools, consisting of two grinding wheels having a screw thread, and a mandrel

for guiding the edge of the cutting tool, characterized in that, for the purpose of sharpening the cutting tools at an angle that decreases with increasing distance from the edge, both grinding wheels having

the shape of a truncated cone, set at an angle to the direction of movement of the cutting tool to be sharpened in its path.

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