Transactions of Materials and Heat Treatment

Title：Development on a new controllable pneumatic rotary cracking fine cutting system for metal bar

Authors： Zhong Bin Yu Zhengyang Lyu Yuan Xu Chao Zhang Chuanwei

Unit： Xi′an University of Science and Technology

KeyWords： metal bar cutting system pneumatic system cracking control technology load control

ClassificationCode：TG31

year,vol(issue):pagenumber：2018,43(8):131-139

Abstract：

For the problems of ‘fast but not smooth’,‘smooth but not fast’, low material utilization and high energy consumption in traditional cutting process for metal bar, a new controllable pneumatic rotary cracking fine cutting process for metal bar was proposed by comprehensively utilizing the notch effect of prefabricated circular groove, the crack tip stress concentration effect of micro and macro cracks, and the cracking control technology. Based on the principles of the new cutting method combining the multidirectional radial forging machine with the mechanical cutting machine, the corresponding cutting experimental system was successfully developed, and the pneumatic system working pressure and flow of the new cutting system were continuously adjusted by PLC centralized control technology to realize the stable input of cutting load course during the cutting process. Furthermore, the cutting experiments of metal bar with different materials were successfully conducted by the proposed cutting load control strategy of ‘constant stress intensity factor range’. The experimental results show that the new cutting system can be well applied to cut the different metal bars with the same diameter, and the good quality of cutting billet is obtained to meet the requirements of subsequent precision plastic forming.

Funds：

国家自然科学基金资助项目(51705416)

钟斌（1984-），男，博士，讲师，E-mail：zhongbin2015@xust.edu.cn；通迅作者：张传伟（1974-），男，博士，教授，E-mail：86693601@qq.com

Reference：

［1］张丽英，贾增耀，苏俭华，等.液压滚切剪在不同剪切速度下剪切过程数值模拟与实验研究
［J］.塑性工程学报，2016，23（5）：209-215.

Zhang L Y,Jia Z Y,Su J H,et al.Simulation and experimental research on cutting process of hydraulic rolling-cut shear with different cutting speeds
［J］.Journal of Plasticity Engineering, 2016，23（5）：209-215.

［2］赵仁峰, 周憬钰, 李言, 等. 回转式高速剪切下料工艺及试验
［J］. 锻压技术, 2017, 42(11): 115-120.

Zhao R F, Zhou J Y, Li Y, et al. Rotary high-speed shearing cutting technology and experiment
［J］. Forging & Stamping Technology, 2017, 42(11): 115-120.

［3］李耀辉, 李永堂. 金属圆棒料径向夹紧高速剪切合理间隙值的研究及应用
［J］. 热加工工艺, 2014, 43(5): 92-95.

Li Y H, Li Y T. Research and application of reasonable clearance of metal round bar radial clamping high speed shear
［J］. Hot Working Technology, 2014, 43(5): 92-95.

［4］齐会萍, 李永堂, 付建华, 等. 棒料径向夹紧精密剪切模
［J］. 锻压装备与制造技术, 2010, 45(2): 88-90.

Qi H P, Li Y T, Fu J H, et al. A precision bar cutting die with radial clamping used on punch
［J］. China Metalforming Equipment & Manufacturing Technology, 2010, 45(2): 88-90.

［5］刘忠德, 张仲谋, 严飞祥, 等. 铬锆铜棒料复合加压精密剪切实验研究
［J］. 热加工工艺, 2011, 40(7): 109-111.

Liu Z D, Zhang Z M, Yan F X, et al. Experimental study on precision shearing of Cu-Cr-Zr bar by composite pressing
［J］. Hot Working Technology, 2011, 40(7): 109-111.

［6］陈明安, 李慧中, 李学谦, 等. 紫铜棒材轴向加压精密塑性剪切变形区的金相组织和断面特征
［J］. 中国有色金属学报, 2005, 15(4): 513-518.

Chen M A, Li H Z, Li X Q, et al. Features of fractured surface and microstructure of plastic shearing zone of red copper bar under axial load
［J］. The Chinese Journal of Nonferrous Metals, 2005, 15(4): 513-518.

［7］陈金德, 邢广汉. 管材的偏心渐进精密剪切
［J］. 模具工业, 1987, (4): 4-6.

Chen J D, Xing G H. Eccentric progressive precision shearing of pipe
［J］. Die & Mould Industry, 1987, (4): 4-6.

［8］杨慧杰，卢秀春，卢伟，等. 基于ANSYS/LS-DYNA的金属薄带材螺旋刃辊切力数值分析
［J］. 塑性工程学报，2017, 24（6）: 221-225.

Yang H J,Lu X C, Lu W, et al. Numerical analysis of helical blade rolling-shear force for thin metal strip based on ANSYS/LS-DYNA
［J］. Journal of Plasticity Engineering, 2017, 24（6）: 221-225.

［9］钟玮, 赵升吨, 王泽阳, 等. 提高棒料下料断面质量途径探讨
［J］. 锻压装备与制造技术, 2016, 51(2): 77-83.

Zhong W, Zhao S D, Wang Z Y, et al. Discussion about method of improving the bar cutting surface quality through raising the hard brittle of material
［J］. China Metalforming Equipment & Manufacturing Technology, 2016, 51(2): 77-83.

［10］Zhang L J, Zhao S D, Lei J, et al. Investigation on the bar clamping position of a new type of precision cropping system with variable frequency vibration
［J］. International Journal of Machine Tools & Manufacture, 2007, 47(7): 1125-1131.

［11］Zhang L J, Zhao S D, Hua C J, et al. Investigation on a new type of low-stress cropping system with variable frequency vibration
［J］. International Journal of Advanced Manufacturing Technology, 2008, 36: 288-295.

［12］Tang Y, Zhao S D, Wang Z W, et al. A novel type of precision cropping machinery using rotary striking action
［J］. Proc. IMechE. Part C: Journal of Mechanical Engineering Science, 2009, 223(9): 1965-1967.

［13］赵仁峰, 赵升吨, 钟斌, 等. 低周疲劳精密下料新工艺及试验研究
［J］. 机械工程学报, 2012, 48(24): 38-43.

Zhao R F, Zhao S D, Zhong B, et al. Experimental study on new low cycle fatigue precision cropping process
［J］. Journal of Mechanical Engineering, 2012, 48(24): 38-43.

［14］Zhong B, Zhao S D, Zhao R F, et al. Numerical and experimental investigation on the influence of main motor rotational frequency in fine-cropping
［J］. Proc. IMechE. Part C: Journal of Mechanical Engineering Science, 2014, 228(3): 514-524.

［15］唐勇, 赵升吨, 王振伟. 一种新型旋转锻打精密下料机的研制
［J］. 锻压装备与制造技术, 2010, 45(6): 14-17.

Tang Y, Zhao S D, Wang Z W. Development of a new type precision cropping machine with rotary striking
［J］. China Metalforming Equipment & Manufacturing Technology, 2010, 45(6): 14-17.

［16］成大先, 王德夫, 姬奎生, 等. 机械设计手册
［M］. 5版.北京: 化学工业出版社, 2015.

Cheng D X, Wang D F, Ji K S, et al. Handbook of Mechanical Design
［M］. Fifth Edition. Beijing: Chemical Industry Press, 2015.

［17］Zhong B, Zhao S D, Zhao R F, et al. Investigation on the influences of clearance and notch-sensitivity on a new type of metal-bar non-chip fine-cropping system
［J］. International Journal of Mechanical Sciences, 2013, 76: 144-151.

［18］郑修麟. 切口件的断裂力学
［M］. 西安: 西北工业大学出版社, 2005.

Zheng X L. Fracture Mechanics of the Notched Parts
［M］. Xi′an: Northwestern Polytechnical University Press, 2005.

［19］郦正能, 关志东, 张继奎. 应用断裂力学
［M］. 北京: 北京航空航天大学出版社, 2012.

Li Z N, Guan Z D, Zhang J K. Application of the Fracture Mechanics
［M］. Beijing: Beijing University of Aeronautics and Astronautics Press, 2012.

［20］Zhong B, Zhao S D, Chen W J, et al. Theoretical and experimental investigation on influence of load control strategy of LY12 duralumin alloy bar fine cropping process
［J］. Theoretical and Applied Fracture Mechanics, 2018, 96:362-369.

Service：

【This site has not yet opened Download Service】【Add Favorite】