基于全生命周期的螺杆转子刀具设计研究

摘要/Abstract

摘要： 由于螺杆转子粗铣过程中,不同部位刀片加工余量差别巨大,存在刀片磨损不均匀的难题,降低了转子的加工精度与效率。为此,依据刀片全生命周期算法,提出增加磨损严重部位铣刀盘的刀片数量,使刀片的生命周期尽量一致的铣刀设计方法,以减少刀片更换次数、提高转子加工精度。与无锡压缩机厂合作,以圆弧转子型线为研究对象,设计了双螺杆压缩机转子刀具。其加工实验结果表明：多刀片螺杆转子粗铣刀粗糙度Ra=12.5μm,符合螺杆转子加工精度要求,铣刀刀片更换时间间隔延长了一倍,证明了该刀具设计方法的合理性。

关键词: 全生命周期, 螺杆转子, 双螺杆压缩机, 加工

Abstract: In the rough milling process, the allowance differences of screw rotor blades at different positions were huge. There were the problems of uneven blade wears, and the machining precision and efficiency of the rotors were dropped. As a result, an algorithm of blade life-cycle was introduced to the cutting tool designs and a new design method was proposed. The numbers of serious worn blades were increased to make the blade life-cycle stay the same. Finally, the arc profile of screw rotors was put as research object. The cutting tools of screw rotors were designed and manufactured. The processing experiments of rotor were established through the cooperation with Wuxi compressor Co. Ltd. The machined surface roughness of multi-blade rough milling cutter of screw rotors is as Ra=12.5μm, which coincides with roughing machining standard of screw rotors. The interval of cutter blade replacement is extended twice. The experiments show that this design method has a better rationality.

Key words: life-cycle, screw rotor, twin-screw compressor, machining

中图分类号:

TH455

何雪明, 陈泽华, 武美萍, 张荣 . 基于全生命周期的螺杆转子刀具设计研究[J]. 中国机械工程.

He Xueming , Chen Zehua, Wu Meiping, Zhang Rong. Study on Tool Profile Design of Screw Compressor Rotors Based on Life-cycle[J]. China Mechanical Engineering.

参考文献

[1]孙晓明. 工艺气用螺杆压缩机市场发展趋势分析[J]. 压缩机技术, 2012（1）:65-68.

Sun Xiaoming. Analysis of Market Development Trends of Screw Compressor for Process Gas [J]. Compressor Technology，2012（1）：65-68.

[2]吴华根, 唐昊, 邢子文，等. 间隙对双螺杆制冷压缩机性能的影响[J]. 西安交通大学学报, 2015,49(2):130-134.

Wu Huagen, Tang Hao, Xing Ziwen, et al. Clearance Effects on Performance of Twin Screw Refrigeration Compressor [J]. Compressor Technology, 2015, 49(2):130-134.

[3]邢子文. 螺杆压缩机研究进展及应用趋势[J].通用机械，2006（1）:30-33.

Xing Ziwen. The Screw Compressor Research Progress and Application Trends[J]. General Machinery，2006（1）：30-33.

[4]巫修海, 张宝夫. 三种常见的干式螺杆真空泵螺杆转子型线分析与螺杆加工方法探讨[J]. 真空技术, 2014, 51(3):5-9.

Wu Xiuhai, Zhang Baofu. Analysis of Rotor Tooth Profile and Discussion of Screw Rotor Machining Methods Based on Three Common Dry Screw Vacuum Pump[J]. Vacuum, 2014, 51(3):5-9.

[5]李志峰, 张彦坤, 王高勇，等. 螺杆转子成形磨削砂轮的修整[J]. 机床与液压, 2014, 42(16):8-10.

Li Zhifeng, Zhang Yankun, Wang Gaoyong, et al. Research on the Grinding Wheel Dressing Method of Screw Rotor[J]. Machine Tool & Hydraulics, 2014, 42(16):8-10.

[6]侯红玲, 赵永强. 双螺杆压缩机转子磨削参数的精确计算[J]. 机械设计, 2014, 31(10):72-75. Hou Hongling, Zhao Yongqiang. Calculation of Grinding Parameters of Twin-screw Compressor Rotor[J]. Journal of Machine Design, 2014, 31(10):72-75.

[7]赵永强, 侯红玲, 李志峰，等. 双螺杆压缩机转子的精密磨削工艺研究[J]. 制造技术与机床, 2014（2）:28-32.

Zhao Yongqiang, Hou Hongling, Li Zhifeng, et al. Research on Twin-screw Compressor Rotor Precision Grinding Method[J]. Manufacturing Technology & Machine Tool, 2014（2）:28-32.

[8]孙兴伟, 赵正庆, 王可，等. 螺旋曲面成型抛光用千叶轮的廓型设计及修整方法[J]. 沈阳工业大学学报, 2014, 36(2):176-181.

Sun Xingwei, Zhao Zhengqing, Wang Ke, et al. Profile Designing and Finishing Method for Flap Wheel Applied in Shaping and Polishing of Spiral Curved Surface[J]. Journal of Shenyang University of Technology, 2014, 36(2):176-181.

[9]Zhang Zhengxiang, Fong Zhanghua. A Novel Tilt Form Grinding Method for the Rotor of Dry Vacuum Pump[J].Mechanism and Machine Theory, 2015, 90:47-58.

[10]贾建军，陈晓东，于广伟，等. 螺杆转子滚刀的精确设计与精密加工[J].机械设计与制造,2013（11）:129-135.

Jia Jianjun,Chen Xiaodong, Yu Guangwei, et al. Precise Design and Precision Machining for Screw Rotator Hob[J]. Machinery Design & Manufacture, 2013（11）:129-135.

[11]Wu Weifeng, Li Jian, Feng Quanke. Simulation of the Surface Profile of the Groove Bottom Enveloped by Millingcutters in Single Screw Compressors[J]. Computer-Aided Design,2011,43:67-71.

[12]Nikola S, Ian K S, Ahmed K, et al. Geometry of Screw Compressor Rotors and Their Tools[J]. Journal of Zhejiang University-Science A, 2011,12(4):310-326.

[13]Lyashkov A A, Panchuk K L. Computer Modeling of a Pump Screw and Disc Tool Cross Shaping Process, International Conference on Oil and Gas Engineering[J]. Procedia Engineering， 2015,113:174-180.

[14]Park S Y, Leek H K, Yang G E, et al. A Study on the Machining of Compressor Rotors Using Formed Tools[J]. International Journal of Precision Engineering and Manufacturing, 2010，11(2):195-200.

[15]Wu Yuren, Hsu W H. A General Mathematical Model for Continuous Generating Machining of Screw Rotors with Worm-shaped Tools[J]. Applied Mathematical Modelling, 2014, 28:28-37.

[16]Brinksmeier E, Mutlugunes Y, Klocke F, et al. Ultra-precision Grinding[J]. CIRP Annals—Manufacturing Technology, 2010, 59:652-671.

[17]Singh V, Ghosh S. Development of Specific Grinding Energy Model[J]. International Journal of Machine Tools & Manufacture, 2012, 60:1-13.

[18]Stosic N. A Geometric Approach to Calculating Tool Wear in Screw Rotor Machining[J]. International Journal of Machine Tools & Manufacture, 2006, 46:1961-1965.