Optical grating ruling engine indexing system macro-positioning executing mechanism adopting ultrasonic friction-reduction technology

Abstract

The invention provides an optical grating ruling engine indexing system macro-positioning executing mechanism adopting an ultrasonic friction-reduction technology. The optical grating ruling engine indexing system macro-positioning executing mechanism comprises a lead screw shaft, a nut in threaded fit with the lead screw shaft, a pulling rod assembly fixedly connected with the nut, and an ultrasonic vibrator assembly; and the ultrasonic vibrator assembly comprises an ultrasonic vibrator fixed to the nut and a driving module connected with the ultrasonic vibrator, and the ultrasonic vibrator vibrates under the effect of the driving module to reduce friction between the nut and the lead screw shaft. According to the optical grating ruling engine indexing system macro-positioning executing mechanism adopting the ultrasonic friction-reduction technology, the creeping phenomenon can be eliminated, the positioning precision of the macro-positioning link is improved, and the control difficulty of a whole indexing system is significantly lowered.

Description

【Technical field】 [0001] The invention relates to the field of precision mechanical transmission, in particular to a macro-positioning actuator of a grating marking machine indexing system using ultrasonic anti-friction technology. 【Background technique】 [0002] The grating marking machine is a special non-standard equipment necessary for making machine-engraved gratings. The working mode of the grating marking machine is very similar to that of the planer, that is, the table carrying the grating blank makes indexing motion along the direction perpendicular to the grating line, and the marking system drives the carving knife to move along the direction perpendicular to the indexing direction. Scribing movement, the movement in two directions is linked according to a certain time sequence, and a series of parallel grating scribe lines can be carved on the grating substrate. [0003] The grating line pitch is usually very small, so the positioning accuracy of the grating mar...

AI Technical Summary

Problems solved by technology

However, the frictional nature of the sliding screw pair determines that it has a large friction coefficient in the transmission process, and it is prone to crawling under the condition of low-speed micro-step and frequent feeding, which increases the difficulty of the control of the entire system

Therefore, the existing grating marking machine indexing system macro positioning actuator must be redesigned

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