Machining device for manufacturing absolute type steel belt grating ruler

Abstract

The invention discloses a machining device for manufacturing an absolute type steel belt grating ruler, and belongs to the field of industry machining. The shortcoming that a traditional exposure device cannot manufacture the absolute type steel belt grating ruler with double code channels with a cycle and without a cycle is overcome. Displacement measurement accuracy is improved. Manufacturing of an overlength measuring steel belt ruler is achieved. The machining device comprises projection exposure heads, a charge coupled device (CCD) detector and a laser marking device. The two projection exposure heads respectively expose half of the width of a steel belt. The laser marking device is placed below a starting end of an exposure region of the steel belt. The CCD detector is placed below a finishing end of the exposure region of the steel belt. Control output ends of the CCD detector and the laser marking device are connected with a computer. The two projection exposure heads are used for respectively generating strip patterns of the code channels with the cycle and without the cycle, which is needed by the absolute type grating ruler, manufacturing of the absolute type grating ruler with code channels is achieved, and a laser interferometer is used for controlling micro displacement change and improving accuracy.

Description

technical field [0001] The invention belongs to the field of industrial processing, and in particular relates to a processing device for manufacturing an absolute steel tape scale. Background technique [0002] The grating ruler displacement sensor, referred to as the grating ruler, is a precision measurement feedback device that uses the optical principle of the grating. Grating ruler displacement sensors are divided into transmission gratings and reflective gratings according to different manufacturing methods and optical principles. The reflective grating means that the light source and the receiving device are installed on the same side of the grating scale, and the position change is reflected by the change of the diffracted light reflected back by the receiving grating scale. The more common ones are steel tape grating and glass grating. [0003] In China, only a few companies use laser lithography equipment to directly engrave on the surface of the scale body to pro...

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Problems solved by technology

[0004] The purpose of the present invention is to propose a processing device for manufacturing an absolute steel tape grating scale, which solves the defect that the traditional exposure device cannot manufacture an absolute grating scale with non-periodic and periodic double code tracks, and improves the displacement measurement accuracy. Realize the manufacture of ultra-long measuring steel tape ruler

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