Optimization Method of VSR Process Parameters for Large Machine Tool Body

Abstract

Abstract:

A new method of achieving the best process parameters of VSR through modal simulation was proposed herein. Then the average stress elimination rate of the new process and the original process on the bed casting was compared. The experimental results show that, the average stress elimination rate of the new technology is as 65.1%, while the original process is as 38.5%. Besides, the stress value of one test point under the original process condition increases instead. The stress elimination rate of the new process is higher than that of the original process. The results verify the correctness of the optimization method of VSR process parameters for large machine tool body.

Key words: vibration stress relief(VSR), modal simulation, blind hole method, stress relieving rate

摘要：

通过模态仿真的方法得到了最佳的振动时效工艺参数,在此基础上选取相同的机床床身铸件作为实验对象，对新工艺和原工艺下的平均应力消除率进行了对比。实验结果表明，新工艺下床身铸件的平均应力消除率为65.1%，原工艺的平均应力消除率为38.5%，另外，原工艺下，有个测点的应力值没有减小反而增大。新工艺下铸件的应力消除率明显大于原工艺下铸件的应力消除率，验证了所提出的振动时效工艺参数优化方法的正确性。

关键词: 振动时效, 模态仿真, 盲孔法, 应力消除率

CLC Number:

TH16

Hu Min, Yu Changwu, Zhao Wanhua, Cun Huaying, Yuan Shengwan, Zhang Wenkai. Optimization Method of VSR Process Parameters for Large Machine Tool Body[J]. China Mechanical Engineering, 2014, 25(23): 3137-3142.

胡敏, 余常武, 赵万华, 寸花英, 袁胜万, 张文凯. 机床基础大件振动时效工艺参数优化方法[J]. 中国机械工程, 2014, 25(23): 3137-3142.

References

[1]米谷茂.残余应力的产生及对策[M].北京：机械工业出版社,1983.
[2]吴晓明，海燕，邓雪莲．重型机床基础结构件的热时效研究[J]．现代机械，2003(1): 57-58.
Wu Xiaoming， Hai Yan, Deng Xuelian. Researches on Thermostable Stress Relief of Foundation Structure Part in the Heavy Duty Machine Tool[J]. Modern Machinery,2003(1): 57-58.
[3]梁化春，汪怀伦，金宁,等．振动时效消除压力机焊接床机身残余应力的实例分析[J]．锻压装备与制造技术，2009(2):54-56.
Liang Huachun, Wang Huailun, Jin Ning.The Case Analysis of Removing Effect of the Residual Stress by VSR for the Press Welding Fuselage[J]. China Metalforming Equipment & Manufacturing Technology,2009(2):54-56.
[4]Munsi A S M Y,Waddel A J,Walker C A.The Influence of Vibratory Treatment on the Fatigue Life of Welds: a Comparison with Thermal Stress Relief[J].Strain, 2001,37(4): 141 - 149.
[5]芦亚萍，马振宇，贾权仕,等．振动时效机理研究[J]．机械科学与技术，2001，37(4):462-464.
Lu Yaping, Ma Zhenyu, Jia Quanshi,et al.Study on Mechinism of Vibrating Stress Releasing[J]. Mechanical Science and Technology for Aerospace Engineering, 2001, 20(4): 462-464.
[6]韩冬，谭明华，王伟明,等．振动时效技术的研究及发展[J]．机床与液压，2007(7):225-228.
Han Dong, Tan Minghua, Wang Weiming, et al. Research and Development of Vibratory Stress Relief[J]. Machine Tool & Hydraulics, 2007（7）: 225-228.
[7]蒋刚，谭明华，王伟明,等．残余应力测量方法的研究现状[J]．机床与液压，2007(6):213-216.
Jiang Gang, Tan Minghua, Wang Weiming, et al. Present Research Status of Measuring Residual Stress[J]. Machine Tool&Hydraulics, 2007（6）:213-216.
[8]全国铸造机械标准化技术委员会．JB/T 5926-2005．振动时效效果评定方法[S]．北京：中国机械出版社，2005.
[9]陈玉安，周上祺．残余应力X射线测定方法的研究形状[J]．无损检测，2001(1):19-22.
Chen Yu’an, Zhou Shangqi.The-state-of-the-art of the Study on the Residual Stress Measurement by X-ray Analysis[J]. Nondestructive Testing, 2001(1):19-22.
[10]廖凯，吴运新，龚海,等．积分法在铝合金厚板残余应力计算中的应用[J]．中国有色金属学报，2009，19(6)：1006-1011.
Liao Kai, Wu Yunxin, Gong Hai, et al. Application of Integral Method on Residual Stress Calculation along Depth in Aluminium Alloy Thick Plate[J]. The Chinese Journal of Nonferrous Metals, 2009, 19(6): 1006-1011.
[11]Claxton R A, Lupton A. Vibratory Stress Relieving of Welded Fabrications[J]. Welding & Metal Fabrication, 1991,59(10): 541 - 542.
[12]Li Chunmei,Cui Fengkui.Research on VSR Process for Large Machine Tool Body[J]. Applied Mechanics and Materials, 2011, 455: 454-457.
[13]潘光东，王文洁，董志鹏．HT250材料应力释放系数值的确定[J]．现代铸铁,2009（1）：87-89．
Pan Guangdong, Wang Wenjie, Dong Zhipeng. Determination of Stress Releasing Factor of HT250 Grade Gray Iron[J]. Modern Cast Iron, 2009（1）:87-89.
[14]顾唯明. 用钻孔应变测量决定残余应力的标准方法——ASTM标准:E837—81[J]. 机械强度, 1986(1):40-43.
Gu Weiming.The Standard Method of Residual Stress Measurement by Borehole Strain——ASTM:E837[J]. Journal of Mechanical Strength, 1986(1):40-43.
[15]潘光东，王文洁，董志鹏．HT250材料应力释放系数值的确定[J]．现代铸铁,2009(1)：87-89．
Pan Guangdong, Wang Wenjie, Dong Zhipeng. Determination of Stress Releasing Factor of HT250 Grade Gray Iron[J]. Modern Cast Iron, 2009(1):87-89.