Research on Failure-rate-based Tool Replacing Strategy

doi:10.3969/j.issn.1000-1093.2016.05.018

Abstract

Abstract: The failure rate of cutting tools is taken as the research object, which has an effect on the reliability of whole machining process. A mathematical model for the dynamic reliability of machining process is established based on the reliability analysis method and the maximum likelihood estimation, in which the cutting parameters are determined as random variables, and the failure rate formula of each tool is also derived. On this basis, a simple method is presented for determining the tool replacing time and the corresponding job according to their respective failure rate. The research results show that, when the reliability of whole machining process system is below a certain threshold value, the proposed model can be used to define which and when cutting tool must be replaced in time in the certain working procedure, of which the failure rate is the biggest. This allows us to make the most of each tool and reduce the number of tool replacing so as to decrease the cost. Meanwhile, a simple algorithm is proposed to keep high process reliability by ensuring that tools are replaced before their failures.

Key words: manufacturing technology and equipment, dynamic reliability, failure rate, cutting tool

CLC Number:

TH122

WANG Xin-gang， LYU Chun-mei， ZHAO Yu-qian， CHEN Xiao-ming. Research on Failure-rate-based Tool Replacing Strategy[J]. Acta Armamentarii, 2016, 37(5): 903-908.

References

［1］ Ramalingam S, Watson J D. Tool-life distributions-part 1: single-injury tool-life model[J]. Journal of Engineering for Industry, 1977,99(3):519-522.
[2］ Akturk M S, Ghosh J B, Gunes E D. Scheduling with tool changes to minimize total completion time: basic results and SPT performance[J]. European Journal of Operational Research, 2004, 157(3):784-790.
[3] Akturk M S, Ghosh J B, Kayan P K. Scheduling with tool changes to minimize total completion time under controllable machining conditions[J]. Computers & Operations Research, 2007, 34(7):2130-2146.
[4] Oral A, Cakir M C. Automated cutting tool selection and cutting tool sequence optimization for rotational parts[J]. Robotics and Computer-Integrated Manufacturing, 2004,20(2):127-141.
[5］ Rodriguez C E P, de Souza G F M. Reliability concepts applied to cutting tool change time[J]. Reliability Engineering and System Safety, 2010,95(8):866-873.
[6] 杨俊茹，李兆前. 确定可转位刀具可靠度的理论研究[J]. 山东大学学报, 2003, 33(3): 235-237.
YANG Jun-ru, LI Zhao-qian. Theoretical study on reliability of cemented carbide tool[J]. Journal of Shandong University, 2003, 33(3): 235-237.(in Chinese)
[7］陈保家，陈雪峰，李兵. Logistic回归模型在机床刀具可靠性评

估中的应用[J]. 机械工程学报, 2011, 47(18)：158-164.
CHEN Bao-jia, CHEN Xue-feng, LI Bing. Reliability estimation for cutting tool based on logistic regression model[J]. Journal of Mechanical Engineering, 2011, 47(18)：158-164.(in Chinese)
[8］王新刚, 李鹤, 吕春梅. 硬质合金刀具的动态可靠性灵敏度研究[J]. 兵工学报, 2014, 35(1): 114-119.
WANG Xin-gang, LI He, LYU Chun-mei. Research on dynamic reliability sensitivity of hard alloy cutting tool [J]. Acta Armamentarii, 2014, 35(1): 114-119. (in Chinese)
[9］李常有, 张义民, 王跃武. 恒定加工条件及定期补偿下的刀具渐变可靠性灵敏度分析方法[J]. 机械工程学报, 2012，48(12)： 162-168.
LI Chang-you, ZHANG Yi-min, WANG Yue-wu. Gradual reliability and its sensitivity analysis approach of cutting tool in invariant machining condition and periodical compensation[J]. Journal of Mechanical Engineering, 2012，48(12)：162-168.(in Chinese)
[10] 孔令飞, 李言, 吕延军, 等. 深孔加工刀具系统的动态稳定域研究[J]. 兵工学报, 2013, 34(5): 611-619.
KONG Ling-fei, LI Yan, LYU Yan-jun, et al. The dynamic stable region of drilling tools system in deep hole drilling [J].Acta Armamentarii, 2013, 34(5): 611-619.(in Chinese)
[11］ Liu H, Makis V. Cutting-tool reliability assessment in variable machining conditions[J]. IEEE Transactions on Reliability, 1996, 45(4):573-581.
［12］荣吉利, 宋乾强, 杨国孝, 等. 正态应力一正态强度下可靠度精确置信下限［J］. 兵工学报, 2015, 36(2): 332-336.
RONG Ji-li, SONG Qian-qiang，YANG Guo-xiao, et al. The exact lower confidence limit of reliability for normal stress and normal strength［J］. Acta Armamentarii, 2015, 36(2): 332-336.(in Chinese)

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