Automatic tensioning device for gear hobbing machine cutter bar

Abstract

The invention discloses an automatic tension device of a gear hobbing machine cutter bar. The automatic tension device comprises a main shaft, a cutter rest shell, the cutter bar, a pull rod, a traction connection piece and a telescopic device, wherein the cutter rest shell is used for fixing the main shaft, the cutter bar is arranged at one end of the main shaft, the pull rod is used for pulling the cutter bar, the traction connection piece is arranged between the cutter bar and the pull rod, and the telescopic device is used for providing a power source for the pull rod. The traction connection piece comprises a pull nail, a transitional pull nail and a multi-petal pull claw, wherein the pull nail is fixed to the cutter bar, the transitional pull nail is fixed to one end of the pull rod, and the pull nail and the transitional pull nail are sleeved with and connected by the pull claw. A mechanical device is used for providing pull force, the force is large and stable, connection rigidity between the main shaft and the cutter bar is enhanced, the hobbing accuracy of a gear hobbing machine is improved, the automation degree is high, the labor intensity of workers is greatly relieved, the work efficiency is improved, and the automatic tension device is simple in structure, high in reliability and convenient to repair.

Description

technical field [0001] The invention belongs to the field of accessories or devices combined with or installed on the gear cutting machine or specially suitable for the forming part of the gear cutting machine, and relates to an automatic tensioning device for a cutter bar of a gear hobbing machine. Background technique [0002] When large-scale CNC gear hobbing machines process gears, because of the large processing modulus, the cutting force of the tool bar spindle also increases, and the hobbing accuracy decreases. Only by improving the connection rigidity between the hobbing machine spindle and the tool bar can the hobbing accuracy be reliably guaranteed. In order to achieve the purpose of enhancing the rigidity of the connection between the tool holder and the spindle, it is necessary to meet the requirement that the step surface and the taper surface of the cutter holder contact with the left end surface and the taper hole of the spindle at the same time, which requires...

AI Technical Summary

Problems solved by technology

[0003] The existing tool rod tensioning is mainly manual tensioning, and because the tensioning rod is long, it is time-consuming and laborious to tighten and adjust

And because the manual tightening force is small, it is impossible to make the cone surface and the step surface of the tool holder contact with the left end surface of the spindle and the taper hole at the same time, usually only the cone surface contacts, resulting in insufficient contact rigidity of the tool holder and a decrease in hobbing accuracy

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