Measuring device and measuring method of diameter of large-sized thin wall ring

Abstract

The invention discloses a measuring device and measuring method of the diameter of a large-sized thin wall ring. The measuring device comprises a machine tool cutter frame and a measuring shaft; the measurement shaft is installed on the machine tool cutter frame through a measuring base; the measuring shaft is a cylinder; the lower end of the cylinder is provided with a measuring disc; the measuring disc is a flat cylindrical measuring disc or a flat spherical measuring disc; and the measuring shaft is movably connected with the measuring disc. According to the measuring method, the inner and outer diameter of a measured workpiece are calibrated at first, and then, the actual measured values of the inner and outer diameter of the measured workpiece are obtained through adopting a macro program tool setting manner. The measuring method specifically comprises the following steps that: (1) X-directional calibration is carried out; (2) Z-directional calibration is carried out; (3) a measurement program is formulated; (4) the measurement program is inputted; and (5) the measurement program is adopted to measure the inner diameter and outer diameter of the measured workpiece. With the measuring method of the invention adopted, the measured values of the inner diameter and outer diameter can be measured fast and accurately, and working time can be shortened, and production efficiency can be effectively improved.

Description

technical field [0001] The invention belongs to the technical field of mechanical measurement, and in particular relates to a measuring device and a measuring method for the diameter of a large thin-walled ring. Background technique [0002] In aerospace machining, large thin-walled ring parts are difficult to measure due to their large diameters. The large diameters of such parts are usually detected by traditional detection methods, using 0-1500mm vernier calipers and 0-2000mm vernier calipers. Since the calipers are relatively large and heavy, a When measuring by a person, the caliper must be placed on the part for measurement, so that the caliper is pressed against the part to deform the part during measurement, resulting in inaccurate measured values; at the same time, the measurement points cannot be kept at the same height when two people measure , and it is easy to deform the parts when measuring the sliding caliper, resulting in inaccurate measurement. For the diam...

AI Technical Summary

Problems solved by technology

[0002] In aerospace machining, large thin-walled ring parts are difficult to measure due to their large diameters. The large diameters of such parts are usually detected by traditional detection methods, using 0-1500mm vernier calipers and 0-2000mm vernier calipers. Since the calipers are relatively large and heavy, a When measuring by a person, the caliper must be placed on the part for measurement, so that the caliper is pressed against the part to deform the part during measurement, resulting in inaccurate measured values; at the same time, the measurement points cannot be kept at the same height when two people measure , and it is easy to deform the parts when measuring the sliding caliper, resulting in inaccurate measurement

For the diameter or surface profile of parts below 1500mm, the three-coordinate measurement needs to be sent back and forth, which will cause a lot of time for the equipment to wait and repeat the alignment process, which will affect the production efficiency; for parts above 1500mm, the stroke of the three-coordinate measuring machine is small. It cannot be measured, and needs to be delegated to an external unit for detection

It can be seen that none of the existing measurement methods can realize online measurement, the measurement is time-consuming and the production efficiency is low

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