Dual-piece hobbing fixture

Abstract

The invention discloses a machine tool part and particularly relates to a dual-piece hobbing fixture which comprises a conical core shaft, an upper vertical column and a first draw rod, wherein the conical core shaft comprises a stepped shaft and a conical body; the upper end of the stepped shaft and one end, which has larger diameter, of the conical body are connected and are equal to each other; the lower end face of the conical core shaft is provided with a first through hole along the axial direction; the stepped shaft is provided with a locating sleeve; the conical body is provided with a spring tensioning sleeve; one end of the first draw rod is coaxially provided with a truncated cone with the diameter not greater than the outer diameter of the spring tensioning sleeve, and the other end of the first draw rod passes through the first through hole; the upper vertical column coaxial with the first draw rod is arranged above the first draw rod, and is fixedly connected with a pressing sleeve. After such a structure is adopted, the machine tool hydraulic cylinder and the upper vertical column are fully utilized, so that workpiece loading and unloading time is shortened, and the labor efficiency is improved; meanwhile the rigidity of the fixture is enhanced; since a sliding bush capable of performing relative movement is not adopted, the workpiece locating precision is high, and the gear processing accuracy is stably ensured.

Description

technical field [0001] The invention relates to a machine tool accessory, in particular to a double-piece hobbing fixture. Background technique [0002] In the machining process, it is often necessary to fix the workpiece before processing the workpiece. Fixtures are common mechanical devices used to fix workpieces in gear machining. When hobbing, the existing fixtures used such as figure 1 As shown, after the workpiece 16 is installed, move the nut 31 clockwise, the nut 31 pushes down the single-head cone plug 36, the single-head cone plug 36 pushes the first spring sleeve 35 to move down, and the first spring sleeve 35 pushes the double-head The cone plug 34 moves down, and the double-ended cone plug 34 pushes the second spring sleeve 33 downward until the second spring sleeve 33 tightens the inner hole of the workpiece 16 below. When the second spring sleeve 33 stops deforming, the double-ended cone plug 34 Stop moving down. When the first spring sleeve 35 tightens th...

AI Technical Summary

Problems solved by technology

[0004] The technical problems to be solved by the present invention include: in the prior art, the gear hobbing fixture consumes a lot of physical strength of the workers, and the clamping takes time, the processing efficiency is low, the fixture rigidity is insufficient and the positioning accuracy is not high.

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