High-precision clamp for quickly replacing hobbing teeth of disc gear

Abstract

The invention discloses a high-precision clamp for quickly replacing hobbing teeth of a disc gear. The high-precision clamp comprises a mandrel mounted on a machine tool workbench, wherein a lower support, a double-cone splicing and expanding sleeve, an upper drawbar and an upper pressure cover are sequentially mounted on the mandrel; and the upper drawbar is connected with a machine tool drawbar. According to the high-precision clamp, the expanding sleeve is designed into the double-cone splicing and expanding sleeve structure, so that the applicability of the expanding sleeve is improved; meanwhile, one mandrel can be adopted to meet processing needs of all components with positioning hole diameters ranging from phi 50cm to phi 100cm. Besides, the support is designed into a split type and a modularized structure; enough dismounting space is kept for a support replacing part according to the mandrel-series requirements, so that the lower support can be directly replaced without dismounting the expanding sleeve. Finally, the lower drawbar is centered in a secondary mode for strictly controlling coaxiality between a machine tool oil cylinder revolving center and a low drawbar threaded center, thereby reducing a gap of matched threads, reducing component radial jumping during sleeve expanding and tightening, and improving the product processing quality.

Description

【Technical field】 [0001] The invention belongs to the technical field of mechanical processing, and relates to a jig for changing gear hobbing, in particular to a jig for quickly changing gear hobbing with high precision. 【Background technique】 [0002] In the production of disc gear products, due to the variety of products, when the diameter of the inner hole of the processed part changes, not only the expansion sleeve needs to be redesigned, but also the mandrel needs to be replaced, resulting in poor versatility of the fixture and increased cost; It takes a long time to replace and adjust the jig when hobbing the jig, which results in an increase in the processing cycle and low production efficiency; when two parts are processed at the same time, the tooth accuracy (tooth shape, tooth direction, accumulation) of the upper gear will be lower than that of the lower gear to be processed. Reduced, affecting the processing quality. 【Content of invention】 [0003] The object...

AI Technical Summary

Problems solved by technology

[0002] In the production of disc gear products, due to the variety of products, when the diameter of the inner hole of the processed part changes, not only the expansion sleeve needs to be redesigned, but also the mandrel needs to be replaced, resulting in poor versatility of the fixture and increased cost; It takes a long time to replace and adjust the jig when hobbing the jig, which results in an increase in the processing cycle and low production efficiency; when two parts are processed at the same time, the tooth accuracy (tooth shape, tooth direction, accumulation) of the upper gear will be lower than that of the lower gear to be processed. Reduced, affecting processing quality

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