| 摘要: |
| 针对在航空航天领域中应用越来越广泛的钛合金3D打印增材制造导轨类结构零件，因其薄壁特性导致的加工变形大、尺寸和形位精度难控制、表面粗糙度差、加工效率低下的问题，本文选用高速铣削工艺对钛合金粉末增材制造形成的导轨类结构零件进行加工实验。分析了高速铣削工艺的加工原理及特点，并设计实验验证了该工艺加工钛合金增材制造导轨类结构零件的可行性。实验结果表明：该工艺可以实现钛合金粉末增材制造导轨类结构零件高质高效地加工，并对比了不同工艺参数下加工后的导轨结构尺寸、形位精度及表面粗糙度，更高切削速度下加工得到的导轨结构尺寸、形位公差更优，同时表面粗糙度值更低，在实验参数范围内，当切削速度为84.78 m/min且切削深度为0.2 mm时，加工后得到的最优粗糙度值Ra为1.944 μm。 |
| 关键词: 增材制造；钛合金；高速铣削；导轨 |
| 基金项目: |
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| Research on High Speed Milling Accuracy of Titanium Alloy Guideway Structures in Additive Manufacturing |
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Fang Jin Gao Ze Zhang Xiaohui Zhang Kaihu Chen Qintao Zheng Liyan
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Beijing Spacecrafts Co., Ltd., Beijing 100094
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| Abstract: |
| In response to the increasingly widespread application of titanium alloy additive manufacturing in the aerospace field, which leads to large machining deformation, difficult control of size and positional accuracy, poor surface roughness, and low machining efficiency due to its thin-walled characteristics, this article uses high-speed milling technology to conduct machining experiments on guide rail structural parts formed by titanium alloy powder additive manufacturing. The machining principle and characteristics of high-speed milling technology were analyzed, and the feasibility of processing titanium alloy additive manufacturing guide rail structural parts using this technology was verified through experimental design. The experimental results show that this process can achieve high-quality and efficient processing of titanium alloy powder additive manufacturing guide rail structural parts. The dimensions, positional accuracy, and surface roughness of the guide rail structure after processing under different process parameters were compared. The guide rail structure dimensions, positional tolerances, and surface roughness obtained under higher cutting speeds were better, and the surface roughness was also better，Within the range of experimental parameters, while the cutting speed is 84.78 m/min and the cutting depth is 0.2 mm, the optimal roughness value after machining is Ra1.944 μm. |
| Key words: additive manufacturing；titanium alloy；high speed milling；guideway |
