Tolerance Allocation of a Helical Milling Spindle Unit

Abstract

Abstract:

In order to improve the whole accuracy of the spindle unit, tolerance allocation for individual key components of the spindle unit was carried out in the early design stage. The main influence factors on the final tolerance of the holes were presented through sensitivity analysis. Tolerance allocation model was established,using the improved statistical tolerance analysis method and GA, the weight coefficient and accuracy storage coefficient were thought out in statistical model. Improved statistical method and GA were all used to allocate the tolerance of the components in the spindle unit design stage with the consideration of the orientation and position errors of the tool tip.

Key words: helical milling, spindle unit, tolerance allocation, improved statistical method, genetic algorithm(GA)

摘要：

基于螺旋铣孔的加工原理设计了螺旋铣孔专用主轴单元,为提高整个单元的精度,对主轴单元的关键部件在设计阶段早期进行了精度分配。对影响孔精度的主要因素进行了分析，分别使用改进的统计方法和遗传算法建立了精度分配模型，统计模型中考虑了权重影响系数和精度储备系数，从刀尖的位置和定位误差角度对主轴单元进行了精度分配。

关键词: 螺旋铣孔, 主轴单元, 精度分配, 改进的统计方法, 遗传算法

CLC Number:

TH122

Wang Haiyan, Qin Xuda. Tolerance Allocation of a Helical Milling Spindle Unit[J]. China Mechanical Engineering, 2014, 25(20): 2729-2734.

王海艳, 秦旭达. 螺旋铣孔主轴单元的精度分配[J]. 中国机械工程, 2014, 25(20): 2729-2734.

References

[1]Ni W Y.Orbital Drilling of Aerospace Materials[C]//AE Manufacturing and Automated Fastening Conference and Exhibition. Los Angeles,USA:2007:3814-3822.
[2]Brinksmeier E,Fangmann S,Meyer I.Orbital Drilling Kinematics[J].Production Engineering Research and Development, 2008,2:277-283.
[3]Denkena B,Boehnke D,Dege J H.Helical Milling of CFRP–titanium Layer Compounds[J].CIRP Journal of Manufacturing Science and Technology,2008,1:64-69.
[4]Iyer R,Koshy P,Ng E.Helical Milling:An Enabling Technology for Hard Machining Precision Holes in AISI D2 Tool Steel[J]. International Journal of Machine Tools & Manufacture,2007,47:205-210.
[5]Chen T C,Fischer G W.A GA-based Search Method for the Tolerance Allocation Problem[J]. Artificial Intelligence in Engineering, 2000,14:133-141.
[6]Chase K W,Greenwood W H,Loosli B G,et al.Least Cost Tolerance Allocation for Mechanical Assemblies with Automated Process Selection[J].Manufacturing Review,1990,3(1):49-59.
[7]杩琳,黄田,王洋,等.面向制造的并联机床精度设计[J].中国机械工程, 1999,10(10):1114-1118.
Qi Lin,Huang Tian,Wang Yang,et al.Accuracy Design of Parallel Machine Tool Faced to Manufacture[J].China Mechanical Engineering,1999,10(10):1114-1118.
[8]卢强,张友良.用蒙特卡洛法进行6腿并联机床精度综合[J].中国机械工程,2002,13(6):464-467.
Lu Qiang,Zhang Youliang.Accuracy Synthesis of a Hexapod Machine Tool Based on Monte-Carlo Method[J].China Mechanical Engineering,2002,13(6):464-467.
[9]康方.数控机床制造精度分配优化方法的研究[D].北京:北京工业大学,2008.
[10]丁文政,黄筱调,周明虎.再制造机床可修复零部件精度分配研究[J]. 机械科学与技术,2007,26(11):1466-1470.
Ding Wenzheng,Huang Xiaodiao,Zhou Minghu.On Precision Distribution Among Restorable Parts and Components of Remanufactured Machine Tools[J].Mechanical Science and Technology for Aerospace Engineering,2007,26(11):1466-1470.
[11]桂定一,陈育荣,罗宁.机床精度分析与设计[M].北京:机械工业出版社,2004.
[12]Wu F C,Dantan J Y,Etienne A,et al.Improved Algorithm for Tolerance Allocation Based on Monte Carlo Simulation and Discrete Optimization[J].Computer & Industrial Engineering,2009,56:1402-1413.
[13]Choi H G R,Park M H,Salisbury E.Optimal Tolerance Allocation with Loss Functions[J].Journal of Manufacturing Science and Engineering,2000,122(3):529-535.
[14]Ji S, Li X, Ma Y, et al. Optimal Tolerance Allocation Based on Fuzzy Comprehensive Evaluation and Genetic Algorithm[J]. International Journal of Advanced Manufacturing Technology,2000,16:461-468.
[15]Abele E, Altintas Y, Brecher C. Machine Tool Spindle Units[J].CIRP Annals-Manufacturing Technology,2010,59:781-802.
[16]盛伯浩,唐华.数控机床误差的综合动态补偿技术[J].制造技术与机床,1997(6):19-21.
Sheng Bohao,Tang Hua.Comprehensive Dynamic Compensation for Error of CNC Machine Tools[J].Manufacturing Technology and Machine Tools,1997(6):19-21.
[17]Haq A N,Sivakumar K,Saravanan R,et al.Particle Swarm Optimization Algorithm for Optimal Machining Allocation of Clutch Assembly[J].International Journal of Advanced Manufacturing Technology,2006,27:865-869.
[18]Hsieh K L.The Study of Cost-tolerance Model by Incorporating Process Capability Index into Product Lifecycle Cost[J]. International Journal of Advanced Manufacturing Technology,2006,28:638-642.