Optical detection clamp for thin-wall spiral groove type part

Abstract

The invention provides an optical detection clamp for thin-wall spiral groove type parts. The optical detection clamp comprises a connecting base (1), a clamping positioning table (2), an inner grid (3), an outer grid (4) and mark points. The connecting base (1) is composed of a metal disc, a handle, a connecting hole and a positioning pin hole and used for carrying and fixing parts. The clamping positioning table (2) is composed of three evenly-distributed supporting blocks, and tightening screws and positioning screws are arranged on the supporting blocks and used for clamping and positioning parts. The inner grid (3) is of a hollow step-shaped frame structure, the outer grid (4) is of a conical frame structure, and mark points are fully distributed on the inner grid (3) and the outer grid (4) according to a certain rule, so that no less than three points in any direction in the breadth of the lens are ensured, and the space position is positioned in the measurement process. The fixture is applied to the process of scanning and measuring thin-wall spiral groove parts by structured light, and has the advantages of simplicity in clamping, no shielding, high positioning precision and the like.

Description

technical field [0001] The invention relates to an optical detection fixture for thin-walled spiral groove parts, belonging to the field of three-dimensional structured light scanning detection. Background technique [0002] Thin-walled spiral groove parts are widely used in liquid rocket engines. There are hundreds of spiral grooves on them. Among them, the groove width, groove depth, and remaining wall thickness are measured by traditional methods such as special calipers, which are time-consuming and labor-intensive. Coverage The reliability is low, and the three-dimensional structured light method can be used to achieve rapid measurement of this type of parts. [0003] When performing three-dimensional structured light measurement on large-size, high-precision parts, it is necessary to use common reference point splicing technology to improve measurement accuracy. At present, the common practice in the industry is to directly paste the points on the parts. This method i...

AI Technical Summary

Problems solved by technology

[0004] The technical problem solved by the present invention is: to overcome the deficiencies of the prior art, to provide an optical detection fixture for thin-walled spiral groove parts, which solves the problem of the reference point in the batch measurement process of thin-walled spiral groove parts using three-dimensional structured light. Stable and reliable positioning is required, and the fixture itself does not block the parts

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