Main shaft device for numerical controlled gear hobbing machine

Abstract

The invention discloses a main shaft device for a numerical controlled gear hobbing machine. The main shaft device comprises a cutter bar assembly, a cutter bar assembly clamping mechanism and a cutter changing mechanism, wherein the cutter bar assembly comprises a cutter bar, a hobbing cutter, a cutter regulating pad, an axle sleeve, a locking nut and a cutter bar blind rivet; the cutter bar assembly clamping mechanism consists of a square key and a claw assembly; and the cutter changing mechanism consists of a pull rod, a piston rod, a disc-shaped spring, a hydro-cylinder body, a flange plate, a bracket, a rotary joint and a spacing switch. The main shaft device has the advantages that: a hydrostatic bearing is arranged in the main shaft structure of the high-accuracy numerical controlled gear hobbing machine, so the main shaft device can constantly work under a heavy-load cutting condition; a main shaft has high accuracy and good accuracy retaining ability; and the cutter bar assembly with the hobbing cutter is arranged and set outside a machine in a cutter workshop; the cutter bar assembly is subjected to whole cutter changing on the gear hobbing machine; and the setting assisting time of the hobbing cutter does not occupy the total part machining time of a machine tool, so the whole machine tool has high working efficiency.

Description

technical field [0001] The invention relates to a spindle device of a numerically controlled gear hobbing machine. Background technique [0002] The main shaft of the existing gear hobbing machine in my country mostly adopts the sliding bearing structure. Since this kind of bearing is particularly easy to wear during use, the hobbing machine cannot withstand heavy load cutting conditions due to the reduction of the precision of the main shaft and poor retention. In addition, the tool change of the main shaft of the existing gear hobbing machine is generally manually operated. When changing the tool bar and hob of different specifications, it is first necessary to manually loosen the lock nut on the long pull rod and the nut on the tool bar, and manually loosen the For the long pull rod, remove the cutter rod and hob, install a new cutter rod and hob, and re-tighten the long pull rod and nut. After the hob is replaced, it is necessary to try cutting the processed parts again ...

AI Technical Summary

Problems solved by technology

[0002]The main shaft of the existing gear hobbing machine in my country mostly adopts the sliding bearing structure, because this kind of bearing is particularly easy to wear during use, which often leads to the reduction of the precision of the main shaft and poor retention Hobbing machines cannot withstand heavy cutting conditions

In addition, the tool change of the main shaft of the existing gear hobbing machine is generally manually operated. When changing the tool bar and hob of different specifications, it is first necessary to manually loosen the lock nut on the long pull rod and the nut on the tool bar, and manually loosen the For the long pull rod, remove the cutter rod and hob, install a new cutter rod and hob, and re-tighten the long pull rod and nut. After the hob is replaced, it is necessary to try cutting the processed parts again for tool setting and replacement of the hob , The tool setting time is long, the labor intensity of the workers is high, the tool setting auxiliary time of the hob all takes up the total part processing time of the machine tool, and the work efficiency of the machine tool is low

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