Method of detecting cladding quality based on laser displacement sensor coaxial powder feeding equipment

Abstract

The invention relates to a method for detecting cladding quality based on a coaxial powder feeding device of a laser displacement sensor, comprising the following steps: firstly, a servo motor moves according to a motion trajectory specified by a processing program; The actual coordinate position of the cladding head relative to the cladding workpiece is first compared with the position of the workpiece signal monitored by the laser displacement sensor to determine whether the position deviation of the two exceeds the deviation range of the signal collected by the laser displacement sensor set in advance, and the signal processing is performed automatically; At the same time, the controller compares the actual coordinate position of the cladding head relative to the cladding workpiece fed back by the servo motor encoder with the pre-planned command position of the servo motor to determine whether the position deviation between the two exceeds the pre-set servo motor automatic adjustment. The deviation range is automatically adjusted for the servo motor. The detection method of the present invention can realize ultra-stable and high-precision measurement for all workpieces that are difficult to detect.

Description

technical field [0001] The invention belongs to the technical field of additive manufacturing, and in particular relates to a method for detecting cladding quality based on laser displacement sensor coaxial powder feeding equipment. Background technique [0002] Coaxial powder feeding laser cladding technology is an important development direction of laser rapid prototyping technology. According to different powder feeding methods, laser rapid prototyping equipment can be divided into two main technical directions: powder spreading type and coaxial powder feeding type cladding technology. . The powder spreading device of the powder spreading 3D printing equipment includes a powder storage chamber, a powder spreading shaft and a scraper. In the printing area of ​​the workpiece, the path scanned by the laser is solidified into a solid structure, and then the substrate in the printing area is lowered to a certain height, and the scraper will The 3D printing metal powder in the...

AI Technical Summary

Problems solved by technology

However, there are several problems with this technology: 1) The CCD industrial camera for video or vision is affected by the strong laser light and the smoke generated during the cladding process. After the algorithm is corrected, the recognition error is still very large; Image processing, image processing speed seriously restricts cladding speed, resulting in low cladding speed and low cladding efficiency

[0005] Existing large-size coaxial powder-feeding printing equipment and technologies all have the problem of not being able to fully automate printing

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