Parameter measuring device and method for large cylindrical workpiece

Abstract

The invention discloses a parameter measuring device for a large cylindrical workpiece. A supporting structure used for supporting a workpiece is fixed to a base. A length measuring mechanism is arranged at one end of the base. The length measuring mechanism comprises an air cylinder, a measuring grating and a first laser displacement sensor. The air cylinder is fixed to the base. The measuring grating is fixed on a push rod of the air cylinder and is pushed by the air cylinder to approach the end part of the workpiece. The first laser displacement sensor is fixed to the base to obtain the moving distance of the measuring grating, and the first laser displacement sensor outputs a displacement distance signal to a controller. The measuring grating is used for sensing the end position of theworkpiece and outputting a signal to the controller, and the controller outputs a driving signal to the air cylinder. According to the invention, the length of a large-size workpiece is accurately measured, the human capital is saved, the efficiency is improved, and errors caused by manufacturing errors, reading error of human factors and workpiece eccentricity of a traditional contact type measuring instrument are reduced.

Description

Technical field [0001] The invention relates to the field of measuring equipment. Background technique [0002] In the field of machinery manufacturing and industrial automation, the machining accuracy of large-scale mechanical workpieces needs to be continuously improved. Therefore, the requirements for the measurement of larger-sized workpieces and the measurement of the round run-out of the workpiece are getting higher and higher to verify whether the workpiece meets the current requirements for machining and production accuracy. Generally, the size measurement of the workpiece can be done with a vernier caliper or a micrometer. For the measurement of the circumferential run-out of the workpiece, the run-out can be measured by a circle checker + a dial indicator. These are all measured by contact measuring tools, but for larger workpieces, Such measurement is laborious, time-consuming and error-prone, inconvenient to operate, and low in efficiency. [0003] At present, the size...

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Problems solved by technology

Moreover, there are manufacturing errors in the measuring instrument itself, and reading errors caused by human factors will also reduce its measurement accuracy.

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