SLS快速成型设备中一种温度补偿校准装置的研究

发布时间：2018-01-14 12:26

本文关键词：SLS快速成型设备中一种温度补偿校准装置的研究　出处：《湘潭大学》2015年硕士论文　论文类型：学位论文

【摘要】：选择性激光烧结(SLS)技术是一种以激光加工粉末材料的快速成型技术。SLS设备中,通过红外传感器对工作区域的温度场温度进行实时反馈来对加热进行控制。本课题针对红外传感器受环境影响产生探测误差的情况设计一种以自身温度为基准,对红外传感器进行补偿校准的温度补偿校准装置。解决由于烧结环境影响造成的探测误差,提高温场稳定性。论文完成主要工作如下:(1)从理论上分析SLS成形工艺及其主要影响因素,分析红外传感器在SLS设备中的关键作用,针对红外传感器在SLS加工中由于环境影响产生的探测误差,提出一种以一个辐射热源作为温度标准对红外传感器进行误差补偿校准的设计方案及运行方案,根据实际使用需求,确定该装置的安装方案,并提出一种红外传感器保护装置的设计需求。(2)根据红外传感器温度补偿校准装置设计方案,对组成温度补偿校准装置的辐射热源、红外传感器保护装置、支撑腔体、驱动机构和摆动机构进行结构设计,并建立三维模型。(3)根据方案设计要求,设计补偿校准方案,基于施耐德PLC进行梯形图编程实现整体控制,并选择功能块实现对温度采集、硅胶加热片加热的信号输入输出控制。(4)在生产试制出温度补偿校准装置原理样机的基础上,搭建实验平台,对温度补偿校准装置进行运行验证。在不同的设定温度下,观察温度补偿校准装置长时间运行是否出现问题。对硅胶加热片PID控制中的比例、积分、微分参数进行整定,找到最优控制参数。
[Abstract]:Selective laser sintering (SLS) technology is a kind of rapid prototyping technology used in laser processing of powder materials. SLS equipment. Through the infrared sensor to work the temperature field temperature real-time feedback to control the heating. This subject for infrared sensors by the impact of the environment caused by the detection error of a design based on their own temperature. A temperature compensation calibration device for compensating and calibrating infrared sensors. The detection error caused by the influence of sintering environment is solved. To improve the stability of temperature field. The main work of this paper is as follows: 1) theoretically analyze the forming process of SLS and its main influencing factors, and analyze the key role of infrared sensor in SLS equipment. Aiming at the detection error caused by the environmental influence of infrared sensor in SLS processing, a design and operation scheme for error compensation calibration of infrared sensor using a radiative heat source as the temperature standard is proposed. According to the actual application requirements, the installation scheme of the device is determined, and a design requirement of the infrared sensor protection device is put forward. (2) according to the infrared sensor temperature compensation calibration device, the design scheme is put forward. The structure of radiation heat source, infrared sensor protection device, supporting cavity, driving mechanism and swing mechanism are designed, and the three-dimensional model is built. 3) according to the design requirements of the scheme, the structure of the radiation heat source, the infrared sensor protection device, the supporting cavity, the driving mechanism and the oscillating mechanism are designed. The compensation calibration scheme is designed, and the integral control is realized by trapezoidal diagram programming based on Schneider PLC, and the temperature collection is realized by selecting the function block. The signal input and output control of silicon gel heating sheet. 4) on the basis of producing the principle prototype of temperature compensation calibration device, the experimental platform is built. The temperature compensation calibration device operation verification. At different temperature, observe whether the temperature compensation calibration device running for a long time or not. The proportion and integral in the PID control of silicon gel heating sheet. The differential parameters are adjusted to find the optimal control parameters.
【学位授予单位】：湘潭大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TG665

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