Precise indexing table based on transmission of high-precision helical standard gear and worm and assembling method

Abstract

The invention belongs to the technical field of precise machining and testing, and provides a precise indexing table based on transmission of a high-precision helical standard gear and a worm and an assembling method. Open-loop control is adopted, a high-precision harmonic motor is adopted for driving, and the worm and the helical gear with a self-locking function are adopted for helical angle engagement transmission. A tension spring anti-backlash mechanism is used for eliminating the backlash between the worm and the helical standard gear and reverse idle stroke errors of the indexing tableare reduced. The radial benchmark of the indexing table adopts a high-precision dense ball shaft system structure, and the radial comprehensive error of the indexing table is smaller than 0.5 micrometer due to the homogenizing effect of the errors. The axial benchmark adopts a plastic-coated sliding bearing structure which has high rigidity and a shock absorption function. The indexing precision of the well assembled indexing table can reach 10 seconds or below. The precise indexing table based on transmission of the high-precision helical standard gear and the worm can realize intermittent indexing or continuous indexing of any angle, has the advantages of being simple in structure, high in indexing precision, high in structure rigidity, stable in indexing precision and low in cost, and can be applied to light-loaded precision processing and test occasions.

Description

technical field [0001] The invention belongs to the technical field of precision machining and testing, and relates to an indexing turntable for machining and testing precision indexing elements. Background technique [0002] The indexing turntable is a very important device in the field of machining and testing. Its core indexing components mainly include several types such as worm gear, rack and pinion, sheave, indexing plate, end tooth plate and direct drive motor. Among them, the indexing accuracy of the end-tooth indexing device is the highest, generally up to 0.5″, and the highest can reach 0.1″; followed by the indexing plate indexing device, the highest indexing accuracy can reach 5″~10″, and the general indexing The precision is 10″~30″. However, these two types of indexing elements mostly adopt open-loop control, and the indexing accuracy depends entirely on the indexing accuracy of the indexing element itself, and continuous indexing at any angle cannot be achiev...

AI Technical Summary

Problems solved by technology

[0006] In order to solve the problem of low cost performance of existing indexing devices, the present invention provides a precision indexing turntable based on high-precision helical standard gear and worm drive,

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