SU984719A1 - Method of working helical teeth of tools with variable alternating circumferential pitches - Google Patents

Description

one

The invention relates to metal working, in particular, to the technology of making helical chip grooves of cutting tools.

A known method of milling disc mills of screw chip grooves of end mills with an uneven circumferential pitch of teeth for two installations, according to which, to ensure a constant ribbon width on the back surface, first grooves with the same circumferential pitch are milled, and then after replacing the milling cutter and additional adjustment in the installation of the workpiece milled other grooves with a different surrounding step 1.

The disadvantages of this method are insufficient performance and accuracy of processing.

The purpose of the invention is the elimination of these disadvantages, namely, increasing productivity and processing accuracy.

This goal is achieved by the fact that the teeth are cut in one set with a set of two cutters, with the division of the machined tool being made

unevenly in accordance with the alternation of district steps.

FIG. 1-4 presents the sequence of processing grooves of end mills of the proposed method.

In the first pass (Fig.), The milling cutter I completely cuts the groove of the tooth 2, limited by the central node (H, fe), and the milling cutter II - the back and the back surface of the adjacent tooth 1 with the cf. After that, the workpiece is rotated around its axis.

10 at an angle of p2 and a second passage is made (Fig. 2), in which mill I partially processes a groove with an angle to form its bottom and front surface of tooth 3, and mill II only touches the back and the angle of the treated tooth 2. Then (Fig. 3), the workpiece is rotated by an angle c, at which cutter I cuts a groove with an angle cfj (located between teeth 4 and 5), and cutter II finally cuts the back and the back surface of tooth 4.

The next pass (Fig. 4) is made after the workpiece is rotated by an "angle" (2 and so with alternating division of the workpiece by - cfjM "f, after each pass of the cutter set, the entire workpiece is fully processed.

Claims (1)

Claim The method of processing helical teeth of tools with variable alternating circumferential steps while simultaneously rotating the tool being machined by its sequential division and translational movement by means of two disk cutters, characterized in that, in order to increase productivity and precision of processing, cutting the teeth is performed in one set with a set of two cutters, moreover, the division of the processed tool is produced in accordance with the alternation of circumferential steps.