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

Abstract

The invention relates to a method for detecting cladding quality based on coaxial powder feeding equipment of a laser displacement sensor, which comprises the steps that firstly, a servo motor moves according to a motion trail specified by a processing program; secondly, a controller compares the machine tool actual coordinate position, which is fed back by a servo motor encoder, of a cladding head relative to a cladding workpiece with the workpiece signal position monitored by the laser displacement sensor, whether the position deviation of the machine tool actual coordinate position and theworkpiece signal position exceeds a preset deviation range of signals collected by the laser displacement sensor or not is judged, and then signal processing is automatically conducted; meanwhile, thecontroller compares the machine tool actual coordinate position, which is fed back by the servo motor encoder, of the cladding head relative to the cladding workpiece with the pre-planned instructionposition of the servo motor, judges whether the position deviation of the machine tool actual coordinate position and the pre-planned instruction position exceeds the preset automatic adjustment deviation range of the servo motor or not, and then automatically adjusts the servo motor. The detection method disclosed by the invention can realize ultra-stable high-precision measurement on all workpieces which 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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