sls快速成型机总统设计.rar

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 毕 业 设 计 中 文 摘 要

　　　作为快速成形技术的一个重要分支，选择性激光烧结SLS以其可加工材料广泛，不需工装等优点受到业内人士的广泛青睐。
　　　本文对新型SLS快速成形的铺粉机构设计，电气部分及软硬件部分进行了深入的研究，主要内容概括如下：
　　　1. 现设计的自动铺粉装置, 实现了粉末铺覆的自动化和铺粉厚度、粉末层密度大小的精确控制, 目的是使生成的金属构件在精度及物理性能上达到试验要求的水平。本套铺粉机构采用双缸供粉，达到提高设备工作效率和自动化的目的。
　　　2.三缸SLS快速成型机控制中常用的电气系统由工控机、激光系统、辅助部件等组成。
　　　工控机担负着控制激光器将计算机图形文件转为粉末表面的扫描图形、控制各运动部件等工作。
　　　成型的基本过程是激光束对粉末材料的选区烧结，激光束的精密控制是成型的关键。光路的主要组成部件有：激光器 、反射镜 、扩束聚焦系统 、扫描器(或称为振镜) 、窗口 、光束合成器 、指示光源等组成。
　　　快速成形系统的辅助控制动作主要有传感器的选择、温度的检测与控制、行程开关等。
　　　3.根据激光烧结快速成形工艺对计算机控制系统的要求，新型SLS快速成形硬件控制系统采用了基于工控机的单微处理器通用型控制结构。而系统软件协调管理整个数控系统，主要完成数据处理与转换、成形装置的运动控制、激光开关控制及人机交互。
　　　
　　　
关键词  选择性激光烧结SLS  铺粉装置  电气系统  硬件  软件

      毕 业 设 计 外 文 摘 要

Title   The design of the powder spreading mechanism and electrical part of the triplex SLS rapid prototyping machine                    

Abstract
As the rapid prototyping technology is an important branch, selective laser sintering SLS, that is widely favored among the industry, has the advantages of its processing material widely, without tools. The new SLS quick forming powder spreading mechanism design, electrical parts and hardware parts have an in-depth research. The main contents are summarized as follows:
1. An automatic powder spreading device now designed achieves the powder spreading automation , the thickness of the powder spreading and the precise control of the size of the powder layer density. The purpose is to make the metal components generated to test the level required to achieve the accuracy and physical properties. This set of powder spreading using a twin-cylinder for the powder to improve equipment efficiency and automation purposes.
2. The control of the triplex SLS used in electrical system consists of industrial computer, laser system and auxiliary parts.
IPC charges with the control of the laser computer graphics files into the powder surface scan graphics, and the control of all moving parts work and so on.
The basic process is that the laser beam sinters powder materials, and precise control of the laser beam is the key to molding. The optical path of the main components: lasers, mirrors, beam expander focus system, a scanner (or galvanometer), windows, beam synthesizer, indicating that the light source and other components.
The auxiliary control action of rapid prototyping system main has the election of sensor, the control and check of temperature, limit switch and so on.
3. Depending on the require to computer control system of the laser sintering rapid prototyping process, the new SLS rapid prototyping hardware control system uses a single microprocessor universal control structure based on the IPC. The system software to coordinate the management of the entire CNC system, mainly completes data processing and conversion, forming the device's motion control, laser switching control and human-computer interaction.

Key words  selective laser sintering SLS  powder spreading device  electrical system  hardware and software