基于选择性激光烧结PS原型的快速铸造工艺研究
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摘要
针对传统熔模精密铸造工艺中熔模制作过程复杂的问题,以某典型零件为研究对象,开展了基于选择性激光烧结技术的熔模精密铸造工艺研究。首先采用SolidWorks建立了零件的三维模型,将模型导入激光烧结设备中,调整并优化了烧结设备的工艺参数,以PS(聚苯乙烯)粉末为原材料进行了激光烧结成型,制得了零件的PS原型;然后,以该PS原型与蜡浇注系统结合后的整体模型作为熔模替代了传统压制蜡模,进行了熔模精密铸造,制得了目标零件的精密铸件;最后,测量并分析了铸件的尺寸精度和表面质量。研究结果表明:通过该快速铸造工艺制得的铸件质量较好,尺寸精度可达CT6级,表面粗糙度可达Ra6.3μm。
Aiming at the difficulty of making fired mold in traditional precision casting industry, an investment casting process study on typical component was conducted based on the selective laser sintering. Firstly, the 3D model of the support was designed by SolidWorks and then introduced to laser selection sintering molding equipment to have some preliminary treatment and then sintered for the PS prototype. Afterwards, the traditional suppressed wax model was substituted by the combined model of the PS prototype and the wax casting system to be the fired mold in casting process to make casting products. At last, the dimensional precision and surface roughness was analyzed. The results indicate that the casting products made by this rapid casting process have good quality as the dimensional accuracy can reach CT6 and the surface roughness can reach Ra6.3 μm.
Aiming at the difficulty of making fired mold in traditional precision casting industry, an investment casting process study on typical component was conducted based on the selective laser sintering. Firstly, the 3D model of the support was designed by SolidWorks and then introduced to laser selection sintering molding equipment to have some preliminary treatment and then sintered for the PS prototype. Afterwards, the traditional suppressed wax model was substituted by the combined model of the PS prototype and the wax casting system to be the fired mold in casting process to make casting products. At last, the dimensional precision and surface roughness was analyzed. The results indicate that the casting products made by this rapid casting process have good quality as the dimensional accuracy can reach CT6 and the surface roughness can reach Ra6.3 μm.
引文
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[8] 谭东,夏少华,史耀君,等.基于3D打印技术的车钩快速铸造工艺研究[J].铸造,2018(6):475-478.
[9] KUMAR S. Selective laser sintering: a qualitative and objective approach[J]. JOM, 2003, 55(10):43-47.
[10] SHIRAZI S F, GHAREHKHANI S, MEHRALI M, et al. A review on powder-based additive manufacturing for tissue engineering: selective laser sintering and inkjet 3D printing[J]. Science & Technology of Advanced Materials, 2015, 16(3):033502.
[11] 杨来侠,刘旭.PS粉的选择性激光烧结成型工艺实验[J].塑料,2016,45(1):100-103.
[2] 钱兵,孙嘉繁,谢菲,等。Si对离心铸造25Cr35NiN6+微合金乙烯裂解炉管抗氧化和抗渗碳性能的影响[J].压力容器,2018,35(5):28-34.
[3] 姜耀林,邵中魁.3D打印在快速熔模精密铸造技术中的应用[J].机电工程,2017,34(1):48-51.
[4] 张学军,唐思熠,肇恒跃,等.3D打印技术研究现状和关键技术[J].材料工程,2016,44(2):122-128.
[5] 张建平,高飞,王玲玲.快速成型技术在熔模精密铸造中的应用[J].新技术新工艺,2014(3):5-8.
[6] 张渝.3D打印技术及其在快速铸造成形中的应用[J].铸造技术,2016(4):759-764.
[7] 姜耀林,邵中魁,郭嘉.基于3D打印技术的离心泵叶轮快速精铸工艺研究[J].制造业自动化,2015,37(2):153-156.
[8] 谭东,夏少华,史耀君,等.基于3D打印技术的车钩快速铸造工艺研究[J].铸造,2018(6):475-478.
[9] KUMAR S. Selective laser sintering: a qualitative and objective approach[J]. JOM, 2003, 55(10):43-47.
[10] SHIRAZI S F, GHAREHKHANI S, MEHRALI M, et al. A review on powder-based additive manufacturing for tissue engineering: selective laser sintering and inkjet 3D printing[J]. Science & Technology of Advanced Materials, 2015, 16(3):033502.
[11] 杨来侠,刘旭.PS粉的选择性激光烧结成型工艺实验[J].塑料,2016,45(1):100-103.
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