Clamping device for gear hobbing

Abstract

The invention discloses a clamping device for gear hobbing. The clamping device comprises a disc body, a mandrel, a pressing block, a nut and an ejector pin, which are sequentially arranged in the axial direction from the bottom to the top, wherein the disc body is detachably connected with a lathe, the disc body is arranged outside the mandrel in a sleeving way, a boss propped against the disc body is arranged at the lower end of the mandrel, a gear fixing part is arranged in the middle of the mandrel, the gear fixing part comprises a shaft shoulder and a shaft journal, the shaft shoulder can be propped against the end surface of a gear, a strip-shaped projection is axially arranged on the shaft journal, a clearance between the strip-shaped projection and a keyway in a gear inner hole is 0.01-0.05 mm, the axial length of the shaft journal is between one times of the axial length of the gear and two times of the axial length of the gear, a threaded section is arranged above the shaft journal and at the upper end of the mandrel, the pressing block sleeves the mandrel hollowly, a nut connected with the threaded section is arranged above the pressing block, and the ejector pin is pressed against the topmost end of the threaded section. The clamping device adopting the scheme is simple in structure and easy to operate, can firmly clamp the gear workpiece, is convenient for rapid hobbing, improves the hobbing processing efficiency of the gear workpiece and reduces the cost.

Description

technical field [0001] The invention relates to the technical field of gear hobbing processing, in particular to a clamping device for gear hobbing. Background technique [0002] A gear is a toothed mechanical part that can mesh with each other. It is a mechanical element with teeth on the wheel rim that can continuously mesh and transmit motion and power. Gears are used very frequently in automobiles. The gear hobbing fixing device usually clamps the gear by expanding the inner hole of the gear. This method is very suitable when the gear machining accuracy is not high, but when the gear machining accuracy is required to reach 0.01mm, at this time The rotating speed of the hob is very high, the relative rotation between the fixing device and the gears is easy to occur, and the gears are not clamped firmly, resulting in unqualified gear processing and reducing production efficiency. Contents of the invention [0003] The present invention intends to provide a clamping devi...

AI Technical Summary

Problems solved by technology

[0002] A gear is a toothed mechanical part that can mesh with each other. It is a mechanical element with teeth on the wheel rim that can continuously mesh and transmit motion and power. Gears are used very frequently in automobiles. The gear hobbing fixing device usually clamps the gear by expanding the inner hole of the gear. This method is very suitable when the gear machining accuracy is not high, but when the gear machining accuracy is required to reach 0.01mm, at this time The speed of the hob is very high, the relative rotation between the fixing device and the gear is easy to occur, and the gear is not clamped firmly, resulting in unqualified gear processing and reducing production efficiency

Images