Numerical control relief grinding method for enveloping worm hob and machine tool for realizing same

Abstract

The invention discloses a numerical control relief grinding method for an enveloping worm hob. When relief grinding is carried out on the left and right side tooth faces of a hob, a main shaft and a rotary disk of the machine tool are firstly synchronously rotated, the rotation angle of the main shaft is theta 0=2s / dl, and a transmission ratio of the main shaft and the rotary disk is equal to a worm pair transmission ratio; the main shaft and the rotary disk are continuously and synchronously rotated to carry out the relief grinding on the tooth faces of the hob, the rotation angle of the main shaft is theta 1=2pi / n ..Ctheta 0, the transmission ratio of the main shaft and the rotary disk satisfies the formula d2(1 / i-1 / i) / d1=tan theta; and the rotary disk is re-rotated with a compensation angle to finish the relief grinding of one tooth face, the compensation angle in the process of relief grinding of the right side tooth faces satisfies the formula delta theta=(pi / n)(1 / (1+k))(1 / i-1 / i), the compensation angle in the process of the relief grinding of the left side tooth face satisfies delta theta=-(pi / n)(1 / (1+k))(1 / i-1 / i); and when relief grinding is carried out on tooth backs, the main shaft and the rotary disk are firstly synchronously rotated, wherein the rotation angle of the main shaft is theta0= 2s / dl, the main shaft and the rotary disk are continuously rotated synchronously to enable a longitudinal feed carriage to carry out the relief grinding on the tooth backs along the longitudinal feeding, the rotation angle of the main shaft satisfies the formula theta 1=2pi / n ..Ctheta0, then the longitudinal feed carriage is reversely fed, the transmission ratio of the main shaft and the rotary disk is equal to the worm pair transmission ration in the whole process of the relief grinding of the tooth backs, and both the longitudinal feeding and the reverse feeding of the longitudinal feed carriage satisfy the formula delta1= (d1pi / n)(1 / (1+k))tan theta.

Description

technical field [0001] The invention relates to a mechanical processing machine tool, in particular to a shovel grinding machine tool for a numerically controlled toroidal worm gear hob. Background technique [0002] The production of the toroidal worm gear hob mainly includes the following steps: making the hob blank according to the size parameters of the torus worm, grooving the hob and relief grinding the inclination angle of the hob. Relief grinding of the hob gear of the hob is mainly to grind the side cutter surface and the back cutter surface to prevent damage to the tooth surface when processing the worm gear. The relief grinding of the hob hob is difficult to guarantee the processing A process of quality. In the prior art, the relief grinding of the hob is mainly processed manually by using an angle grinder, the execution force of the drawing is insufficient, the consistency of each tooth processing is difficult to guarantee, and it is difficult to carry out quant...

AI Technical Summary

Problems solved by technology

In the prior art, the relief grinding of the hob is mainly processed by hand with an angle grinder, the execution of the drawing is insufficient, the consistency of each tooth processing is difficult to guarantee, and it is difficult to carry out quantitative analysis when a problem occurs, and the quality of the hob is improved. Not guaranteed and improved

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