Device assisting ordinary gear hobbing machine in machining arc-shaped gear

Abstract

The invention relates to a fixture assisting an ordinary gear hobbing machine in machining an arc-shaped gear. The fixture assisting the ordinary gear hobbing machine in machining the arc-shaped gear comprises a positioning device, a rail device, a hand wheel adjusting device, a profiling device, an idler wheel device and a tension device, wherein the positioning device fixes a gear blank on a working platform of the gear hobbing machine, the rail device is embedded in the positioning device, the hand wheel adjusting device is simultaneously and fixedly connected with one side, away from an idler wheel, of the positioning device and one side, away from the idler wheel, of the rail device, the hand wheel adjusting device can control the rail device to slide back and forth along the connecting line of the center of a gear and the center of a hob, the profiling device is fixedly connected with one side, close to the hob, of the rail device, the idler wheel device is fixedly connected with a knife rest of the hob and can move in the axial direction of the gear along with the knife rest of the hob, and the tension device is connected with the working platform of the gear hobbing machine in a threaded mode. The tension device always pulls and presses the profiling device on the idler wheel device, and a section of working surface which is in the axial direction of the gear and completely in line with a gear bus is arranged on one face, making contact with the idler wheel device, of the profiling device so that the gear can move in the radial direction of the gear relative to the hob.

Description

technical field [0001] The invention relates to a device for assisting ordinary gear hobbing machines in processing arc gears. Background technique [0002] Arc-shaped gears, that is, the pitch circle line and the root circle line are all arc lines, the contour line of the tooth is an involute line, and the generatrix of the tooth is a drum-shaped gear viewed from the tooth top. It is generally used in arc couplings, which is equivalent to a spline connection in terms of transmission form, and due to the crown tooth structure of the arc gears, it can allow the two shafts to be connected to have a certain radial deflection angle w. During the processing of gears, the worktable of the existing ordinary gear hobbing machine generally only performs rotary motion, while the hob can only perform feed motion along the axial direction of the gear, that is, there is no gap between the processed workpiece and the tool along the radial direction of the gear. Relative feed movement, so...

AI Technical Summary

Problems solved by technology

During the processing of gears, the worktable of the existing ordinary gear hobbing machine generally only performs rotary motion, while the hob can only perform feed motion along the axial direction of the gear, that is, there is no gap between the processed workpiece and the tool along the radial direction of the gear. Relative feed movement, so the general gear hobbing machine cannot process gears whose pitch circle line and root circle line are arc lines on the longitudinal section of the gear

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