A computer control method for an intelligent manufacturing system

Abstract

A computer control method for an intelligent manufacturing system. The computer control system (1) is used to control the laser 3D printing system (2), and the processing parameters of the laser 3D printing system (2) are specifically implemented based on the monitoring of the melting channel temperature on the laser processing surface. (mainly laser power) adjustment, and, through the computer control system (1) based on the monitoring of the overall environmental parameters in the airtight molding cavity (3), the adjustment of the temperature and pressure environment of the laser 3D printing system (2) is implemented, thereby Incorporate the temperature and pressure influence components brought about by laser energy regulation into the environmental conditions, and set the standard thresholds such as melt channel temperature, ambient temperature, and environmental pressure as the threshold range through computer programs, so that the entire adjustment process is a metastable State adjustment, while meeting the needs of 3D printing, reduces the burden of equipment start-up and response. The automatic detection and regulation of interfering gases further ensures product quality and protects equipment and instruments.

Description

technical field [0001] The invention relates to the technical field of intelligent control, in particular to a computer control method for a metal laser 3D printing intelligent manufacturing system. Background technique [0002] Metal laser 3D printing is an advanced manufacturing process for metal parts. In recent years, many domestic universities have launched research on metal laser 3D printing. Computer control technology is the basis for realizing intelligent control. It runs through the entire process of metal laser 3D printing. Computer modeling of layers, layer slicing to laser scanning path planning, three-dimensional motion control of multi-axis systems, real-time analysis of printing quality and real-time monitoring of printing environment are all inseparable from computer control. For example, the Chinese invention patent with the application number 201310288137.7 discloses a 3D printing manufacturing device and method for metal parts. The whole device is control...

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Problems solved by technology

[0003] The quality of laser 3D printing of metal parts is related to many factors, among which laser energy has a greater influence, which is the key to determining the degree of metal sintering or melting and determining the metal crystallization structure. In addition, 3D printing is carried out in a closed environment and a protective atmosphere. Temperature and temperature also have a great influence on the internal and external quality of the printing layer. Therefore, in addition to the realization of 3D modeling and 3D printing process, metal laser 3D printing is highly dependent on computer control technology. Automatic control to ensure printing quality is another important application direction. The Chinese invention patent application number 201310024477.9 discloses a selective laser melting SLM atmosphere protection system, including a central control system. Host computer communication connection, selective laser melting SLM atmosphere protection system is equipped with oxygen content sensor, water content sensor, pressure sensor and internal temperature sensor, the central control system can automatically adjust the pressure and temperature of the atmosphere protection system to achieve constant pressure and constant temperature Forming, providing a high atmosphere cleanliness environment for the selective laser melting SLM process, this technology fully considers a variety of basic influencing factors in the 3D printing environment, but its temperature detection is only the detection of the preheating temperature, not the temperature of the ambient atmosphere , although there may also be related disclosures about ambient temperature monitoring in the prior art, so far there is no correlation between the temperature field of the laser-processed surface and the ambient temperature, nor does the atmospheric pressure condition be included in the goal of environmental control

[0004] In addition, there may be related disclosures about ambient atmosphere pressure monitoring in the prior art, and ambient temperature and ambient atmosphere pressure may also be included in the environmental control goals. On the one hand, as mentioned above, the ambient temperature does not include laser energy regulation On the other hand, the object of regulation is also the inherent atmosphere itself, and the important influencing factor of interfering gas is not considered.

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