摘要：从料缸供粉铺粉车单向铺粉的基础上，根据快速成型的需求，提出了上供粉双向铺粉的设计思路，对上供粉结构与铺粉系数关系进行研究及应用。通过对成型材料的性能分析，得出供粉装置的材料选用及后处理办法，通过试验证明方案的可行性。从成本和占用空间的思路出发，单缸替代双缸的设计思路，降低了生产制造成本，缩小了设备体积，方便了设备的运输。并通过激光烧结成型过程中的反复测试及分析，根据分析数据获得了合理的铺粉系数，使得成型过程中高效铺粉，快速成型。通过供粉缸铺粉与上供粉结构的对比分析，结果表明上供粉从结构和成型时间上取得了优势，简化了设计结构，提高了成型效率。

关键词：上供粉;铺粉系数;单成型缸;激光烧结

中图分类号：TH12文献标志码：A文章编号：1009-9492（2021）12-0251-03

Research and Application of Laser Sintering Device for Supplying Powder

Chen Jianhua

（ Hebei Inmanka Technology Co. ，Ltd. ，Chengde，Hebei 067600，China ）

Abstract：According to the requirement of rapid prototyping，the design idea of the upper feeding bi-directional powder laying was put forwardon the basis of the one-way powder laying on the cylinder feeding car，and the relationship between the upper feeding structure and the powder laying coefficient was studied and applied. Through the performance analysis of the molding material，the material selection and post-treatment methods of the powder feeding device were obtained，and the feasibility of the scheme was proved by the test. Based on the idea of cost and occupied space，the design idea of single cylinder instead of double cylinder reduced the production cost，reduced the volume of equipment，andfacilitated the transportation of equipment. And through the laser sintering process of repeated testing and analysis，according to the analysis of the data toobtain a reasonable powder laying coefficient，madetheprocessof highefficiency powder laying，rapidmolding. Through the comparison and analysis of the structure of the powder feeding cylinder and the upper powder feeding，the results show that the upper powder feeding has obtained visible advantages from the structure and molding time，simplifies the design structure and improves the molding efficiency. Key words：upper supply powder;powder laying coefficient;single forming cylinder;laser sintering

0 引言

激光烧结（Selective Laser Sintering，SLS），又称选择性激光烧结、粉末材料选择性激光烧结[1-2]，作为3D 打印的一种，与其他3D 打印技术相比，具有工艺简单、用材广泛、制造成本低等特点[3-5]。

选择性激光烧结的工作原理及技术特点如下：首先通过铺粉车将料缸中的粉末平铺在成型缸上表面，均匀铺平后进行粉层加热，在加热的短暂时间内，铺粉车做返程动作，回到初始位置，料缸上升高度以供铺粉，加热完成扫描当前层[6]。此供粉方式应用普遍，且稳定性较好，不足之处在于铺粉时间较长，成型时间不可控，且双缸的生产制造成本较高[7]。目前生产制造行业飞速发展，为顺应时代发展，故提出提高成型效率的需求。……