Calibration method and device for multi-region heating device, and three-dimensional object manufacturing device

Abstract

The invention relates to calibration method and device for a multi-region heating device, and a three-dimensional object manufacturing device. The calibration method comprises the steps of acquiring temperature of a datum point and multiple detection points, comparing the temperature of the multiple detection points and the temperature of the datum point, recording one detection point with the temperature being higher than the temperature of the datum point as a high temperature detection point, and recording one detection point with the temperature being lower than the temperature of the datum point as a low temperature detection point; reducing the output power of a heating pipe corresponding to the high temperature detection point, and increasing the output power of heating pipes corresponding to the all detection points; or increasing the output power of a heating pipe corresponding to the low temperature detection point, and reducing the output power of the heating pipes corresponding to the all detection points; and acquiring the temperature of the datum point and the multiple detection points in a working area, and accomplishing calibration when a difference value between the temperature of the all detection points and the temperature of the datum point is within the allowed range. According to the calibration method and the device for the multi-region heating device, and the three-dimensional object manufacturing device provided by the invention, the output power of the heating pipes can be automatically adjusted, so that the consistency of the temperature at various points of the working area in the forming process every time is ensured.

Description

technical field [0001] The present application relates to the technical field of additive manufacturing, in particular to a calibration method and device for a multi-zone heating device and a three-dimensional object manufacturing device. Background technique [0002] Additive manufacturing technology is an advanced manufacturing technology with distinctive features such as digital manufacturing, high flexibility and adaptability, direct CAD model drive, fast speed, and rich and diverse material types. tooling mold, so the application range is very wide. Selective Laser Sintering (SLS) is one of the fastest-growing additive manufacturing technologies in recent years. [0003] The basic process of selective laser sintering is: install a multi-zone heating device above the area to be formed to preheat the powder in the area, so that the powder in the area reaches a relatively uniform and stable temperature, and then the scanning system (galvanometer) according to the three-di...

AI Technical Summary

Problems solved by technology

At present, the output power of each component of the mainstream multi-zone heating device is fixed, and it cannot be flexibly adjusted according to the changes in the molding cavity. At the same time, the output power of the heating device must be attenuated to a certain extent after long-term use, and the attenuation degree of each component is not the same.

Due to the existence of the above situation, the stability of the heating device will be affected to a certain extent with the increase of the use time, which will eventually lead to a decline in the quality of the molded parts

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