空压机螺杆转子快速增材成形工艺及试验分析

Rapid Additive Forming Technology and Experimental Analysis of Screw Rotors in Air Compressors

尝试采用SLM技术增材成形螺杆转子,并设计了几种性能实验。对成形试样退火前后、不同成形方向力学性能进行分析可知:试样平均致密度约为97%,整体质量良好。XY方向成形和Z形方向成形强度满足锻造标准,Z方向成形的塑性较XY方向成形较好。综合考虑纵向成形螺杆转子,并设计支撑结构与扫描策略,最终成功成形螺杆转子,平均尺寸误差在100μm左右,可直接进入精磨阶段。

This article attempts to use SLM technology to add materials to form screw rotors.Several performance experiments were designed before forming,and the mechanical properties of the formed samples before and after annealing and in different forming directions were analyzed.It can be concluded that the average density of the samples is about 97%,and the overall quality is good;The strength of forming in the XY and Z-directions meets the forging standards,and the plasticity of forming in the Z-direction is better than that in the XY direction;By comprehensively considering the longitudinal forming of the screw rotor and designing the support structure and scanning strategy,the screw rotor was successfully formed with an average size error of around 100,which can directly enter the precision grinding stage.