A Research For A Kind Of Temperature Calibration Device Used In SLS Rapid Equipment

Selective laser sintering(SLS) technology is a kind of rapid prototyping technology by the laser processing of powder material. Through the IR sensor real-time feedback the temperature field of the working area to control heating temperature real-time feedback. This topic for infrared sensors create detection error is affected by the environment design of a temperature itself as a benchmark, the infrared sensor calibration to compensate the temperature compensation of the calibration device. To solve the detection error caused by sintering environmental impact, Improve the stability of temperature field. The thesis mainly work as follows:(1) From the theoretical analysis of SLS forming technology and its main influencing factors,analysis of the key role in the infrared sensor in SLS equipment. For IR sensor in the SLS process due to detect errors caused by environmental impact, put forward a kind of temperature as the standard with a radiant heat source of infrared sensor calibration error compensation scheme of the design and operation. According to the actual use requirements, determine the installation scheme of the device, and puts forward a kind of infrared sensor protection design requirements.(2) According to the infrared sensor calibration temperature compensation device design scheme, radiation heat source for the compensation of temperature calibration device, infrared sensor protection, support the cavity structure design, drive mechanism and tilting mechanism, and establish the 3 d model.(3) According to the plan, design compensation calibration scheme, based on schneider PLC ladder diagram programming to achieve the overall control, and select the function block to realize the collection of temperature, the silicone heating heating control signal input and output.(4) In the production of temperature compensation calibration device is developed on the basis of principle prototype, structures, experimental platform, the temperature compensation calibration device for running test and verify. Under different set temperature, temperature compensation to observe the stability of the calibration device for a long time running. On the silicone heating the proportion, integral, differential PID control parameters setting, to find the optimal control parameters.