Laser ultrasonic online nondestructive material-increase manufacturing part detection method

Abstract

The invention provides a laser ultrasonic online nondestructive material-increase manufacturing part detection method and belongs to the field of nondestructive detection. The laser ultrasonic online nondestructive material-increase manufacturing part detection method utilizes the change of laser excited ultrasonic surface wave amplitude to detect metallurgical defects produced during material-increase manufacturing process, a detection device is integrated with a high-energy beam generating device of a material-increase manufacturing device to achieve synchronous part defect detection in the material-increase manufacturing process, non-detection zones brought due to complicated shapes after part manufacturing is completed are avoided, and the reliability of material-increase manufacturing parts is improved. In addition, the detection process and the manufacturing process are combined so that follow-up detection time can be omitted, and the production efficiency of the whole material-increase manufacturing part production process can be improved.

Description

technical field [0001] The invention relates to a laser ultrasonic on-line non-destructive testing method for additively manufactured parts, belonging to the field of non-destructive testing. Background technique [0002] As a revolutionary manufacturing process, additive manufacturing can produce complex structural parts that are difficult or even impossible to manufacture by traditional subtractive manufacturing methods, greatly increasing the flexibility of product design, and is especially suitable for rapid manufacturing of small batches of parts. As additive manufacturing parts are gradually applied in important components involving product safety, non-destructive testing of internal defects is becoming more and more important. However, the existing non-destructive testing methods have the following problems for additively manufactured parts: First, the parts manufactured by additive mostly have very complex shapes or structures, and traditional ultrasonic, ray and oth...

AI Technical Summary

Problems solved by technology

However, the existing non-destructive testing methods have the following problems for additively manufactured parts: firstly, the parts manufactured by additive mostly have very complex shapes or structures, and traditional ultrasonic, ray and other non-destructive testing methods are obstructed during the testing process. Second, compared with traditional methods, the machining allowance on the surface of additively manufactured parts is very small, and many non-destructive testing methods have surface blind spots. If the surface machining allowance is too large Small, there may be some areas that will not be processed and cannot be detected, which will bring hidden dangers to the product. Third, the traditional non-destructive testing method is to test after the additive manufacturing parts are manufactured, and the detection time is even longer than the manufacturing time, making the entire production The process takes a lot of time, so traditional non-destructive testing methods have difficulties in testing additively manufactured parts