SU1741992A1 - Method for machining spur gear-wheels - Google Patents

Abstract

Application: The invention relates to metalworking and will be used when cutting cylindrical internal gears with curvilinear longitudinally shaped teeth. Summary of the invention is a method of processing cylindrical gears 1 carried by a tool in the form of a chain 2, the links x 3 of which move along a closed trajectory forming two straight sections AB and DC and two arcuate sections AD and BC, cutting elements 4 are placed, Wheel 1 is reported to rotate around the axis OiOi. Before processing the chain is disconnected, one of the branches is inserted into the base hole of the wheel being processed and closed. The chain is established from the condition of its straight sections in parallel to the ends of the wheel and the combination of the center of one of the arcuate sections with the center of curvature of the tooth. Then begin processing. 2 Il.

Description

The invention relates to machining and can be used when cutting the internal curved teeth of cylindrical gears.

The purpose of the invention is the expansion of technological capabilities by creating the conditions for the manufacture of internal gears with teeth bent in the longitudinal direction.

FIG. 1 shows a cutting pattern for internal circular teeth; in fig. 2 is a view A of FIG. one.

The processing of a cylindrical gear 1 is produced by a tool in the form of a chain 2, on links x 3 of which are moving along a closed trajectory, forming two straight linear AB, DC and two

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arcuate section AO, BC, cutting elements 4 are placed. Wheel 1 is reported to rotate around the axis OiOi.

Before processing, the chain in place of the split section is disconnected. One of the branches is inserted into the base hole 5 of the wheel 1 and closes the chain. The latter is exposed from the condition that the straight sections of the path AB and CD are located parallel to the ends of the wheel and on either side of them. Within the limits of the arc EF, the tool's teeth cut out layers of material and form a depression. The center of the arcuate portion AD, on which the working zone is located, coincides with the center O of the curvature of the line of the tooth being cut. The axis of the arcuate portion is mated with the axis of the wheel. The wheel is rotated around the axis OiOi. If this rotation is carried out continuously, the arched teeth will be processed. If the billet is stationary during the passage of the shaping teeth, the circular teeth will be processed.

With the straight profile of the shaping teeth of the tool, the lateral surfaces of the depression of the wheel 1 are conical surfaces with a common axis of the cone coinciding with the axis of rotation of the cutting elements in section AD. Such a wheel, cut without rolling, with circular teeth, can be used in semi-rolling gears paired with gear wheel, processed by the rolling method. After passing through a group of tool teeth machining a cavity, the workpiece is rotated one tooth and the machining cycle is repeated.

Claims (1)

Claims The method of processing cylindrical gears with a chain-shaped tool, on the links of which, moving in a process, follows a closed path that forms two rectilinear and two arcuate sections, cutting elements are placed, while the wheel being processed is reported to rotate around its axis, differing in that, in order to expand technological capabilities by creating conditions for obtaining internal gears with curvilinear teeth in the longitudinal direction, A chain with a detachable section, before processing the chain is opened, one of the branches is inserted into the base hole of the wheel to be machined, the chain is closed and established from the condition of its straight line sections parallel to the wheel ends and the center of one of the arc-shaped sections coincides with the center of curvature of the tooth, then begin processing. dida Schi 2