Diameter measurement device and measurement method of inner groove

Abstract

The invention relates to a diameter measurement device and measurement method of an inner groove, and particularly to a diameter measurement device and measurement method of an inner groove with larger depth, higher size accuracy and a deeper position, and belongs to the technical field of machinery machining. According to the device and method, reference pad pieces are used to reduce the inner groove, and a diameter of the inner groove is further indirectly measured through a measurement instrument, thus the problem that the diameter cannot be measured due to that a measurement claw cannot bein contact with the measured inner groove is solved, and measurement instruments with different accuracy levels can realize diameter measurement of the inner groove with different accuracy. Further,the reference pad pieces of a multi-segment tile-shaped structure are used to be in contact with measurement heads of the measurement instrument, a contact area is large, a measurement value is stable, and measurement errors of different operators are reduced.

Description

technical field [0001] The invention relates to a measuring device and a measuring method for the diameter of an inner groove, in particular to a measuring device and a measuring method for the diameter of an inner groove with a relatively large depth, high dimensional accuracy and a relatively deep position, and belongs to the technical field of mechanical processing. Background technique [0002] At present, the diameter of the inner groove on the market is mainly measured by general methods, such as direct measurement by vernier calipers, inner diameter dial indicators, inner diameter dial gauges, inner calipers, calipers with meters, inner diameter dial indicators, and three-jaw inner diameter micrometers. However, according to the different structural sizes of the tested products, the general measurement method has the following deficiencies in applicability, such as the measurement accuracy and resolution of vernier calipers, inner diameter dial indicators, inner calipe...

AI Technical Summary

Problems solved by technology

[0002] At present, the diameter of the inner groove on the market is mainly measured by general methods, such as direct measurement by vernier calipers, inner diameter dial indicators, inner diameter dial gauges, inner calipers, calipers with meters, inner diameter dial indicators, and three-jaw inner diameter micrometers. However, according to the different structural sizes of the tested products, the general measurement method has the following deficiencies in applicability, such as the measurement accuracy and resolution of vernier calipers, inner diameter dial indicators, inner calipers, and calipers with meters, etc., which cannot meet the detection requirements. Table and three-jaw inner diameter micrometer are easy to measure grooves with high precision but not easy to measure deep grooves

Especially for the measurement of the groove diameter with a large depth and a deep position, the general measurement method is difficult to complete due to problems such as interference of measuring claws, insufficient range, and insufficient accuracy.

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