Preloaded quick-change gear hobbing fixture

Abstract

A pre-pressing-type quick-replacing hobbing clamp comprises a mandrel. A pre-pressing mechanism and a clamping mechanism are arranged at two ends of the mandrel, the pre-pressing mechanism comprises a connecting seat mounted at the upper end of the mandrel in a sleeved manner, an inner spacer bush is mounted on the connecting seat in a sleeved manner, a pre-pressing spring is arranged between the inner spacer bush and the connecting seat, a connecting disc I fixedly connected with the connecting seat and a protecting sleeve component in sliding fit with the connecting seat are mounted outside the inner space bush in a sleeved manner, an upper pressing disc is arranged on the protecting sleeve component, a retaining ring is arranged on the connecting seat, the clamping mechanism comprises a pulling sleeve mounted on the mandrel in a sleeved manner and a pulling rod fixedly connected with the lower end of the mandrel, a pulling seat is arranged at the bottom end of the pulling sleeve, a base mounted on a workbench is mounted on the pulling seat in a sleeved manner, a clamping spring is arranged between the pulling seat and the base, the pulling sleeve is provided with a positioning seat fixedly connected with the base in a sleeved manner, an expansion sleeve is mounted at the upper end of the positioning seat in a sleeved manner, a conical sleeve matched with the expansion sleeve is mounted at the upper end of the pulling sleeve in a sleeved manner, conical surface matching structures I are arranged between the positioning seat and the expansion sleeve as well as between the conical sleeve and the expansion sleeve, a supporting seat is mounted outside the positioning seat in a sleeved manner, and a lower pressing disc is arranged on the supporting seat.

Description

technical field [0001] The invention belongs to the technical field of gear hobbing fixtures, and in particular relates to a preloaded quick-change gear hobbing fixture. Background technique [0002] Traditional gear hobbing fixtures generally adopt a mechanical structure of fixed mandrel centering or expansion sleeve centering, manual or hydraulic pressure. The gear hobbing fixture of this structure can only be clamped and fixed for a certain type of parts, and is suitable for single-species, small-batch gear hobbing processing. However, in the actual production process, a machine tool often needs to process many kinds of workpieces, which means that every time a workpiece is replaced, a set of hobbing fixtures must be replaced, and the accuracy needs to be re-adjusted. The adjustment cycle is long, which is a waste of time. , even experienced operators need about 40 minutes. Therefore, the existing gear hobbing fixtures have disadvantages such as inconvenient loading and...

AI Technical Summary

Problems solved by technology

Although the gear processing fixture can meet the clamping and fixing of hobbing workpieces to a certain extent, the fixture uses a rigid mandrel for centering, which still cannot meet the requirements for clamping various workpieces

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