锻压技术

新型低应力致裂精密下料装置试验研究

英文标题：Test study on new type low stress cracking precision blanking device

作者：于正洋1 钟斌1 李进2 张传伟1

分类号：

出版年,卷(期):页码：2022,47(3):125-129

摘要：

针对金属棒料精密下料问题，提出一种基于疲劳断裂的新型低应力致裂下料方法。基于旋转弯曲疲劳下料与弯曲折断下料的原理，研制相应的精密下料试验平台，并利用人为预制环状缺口的应力集中效应，通过可编程逻辑控制技术调节金属棒料的旋转速度与液压缸的输出压力，实现了金属棒料的精密下料。利用不同的工艺参数以及载荷控制曲线对304不锈钢棒料进行下料试验，获得理想的坯料断面。试验结果表明，在下降压力控制载荷曲线与旋转速度为30 r·min-1的工艺参数下，304不锈钢坯料断面的凸起高度为0.765 mm、凹陷深度为0.209 mm，所获得的坯料断面能够在锻造行业中直接应用。

For the problem of precise blanking for metal bar, a new low stress cracking blanking method based on fatigue fracture was proposed, and based on the principles of rotary bending fatigue blanking and bending and breaking blanking, the corresponding precision blanking test platform was developed. Then, using the stress concentration effect of artificial prefabricated annular notch, the rotary speed of metal bar and the output pressure of hydraulic cylinder were adjusted by programmable logic control technology, and the precision blanking of metal bar was achieved. Furthermore, the blanking test of 304 stainless steel bar was carried out by different process parameters and load control curves, and the ideal blank section was obtained. The test results show that under the process parameters of descending pressure control load curve and rotary speed of 30 r·min-1, the raised height and the recessed depth of blank section for 304 stainless steel are 0.765 and 0.209 mm respectively, and the obtained blank section can be directly applied in forging industry.

基金项目：

国家自然科学基金资助项目（51705416)；陕西省自然基金资助项目(2019JLP-06)

作者简介：于正洋(1993-), 男，博士研究生 E-mail：550891186@qq.com 通信作者：钟斌(1984-), 男，博士，副教授 E-mail：zhongbin2015@xust.edu.cn

参考文献：

[1]Hua C J, Zhao S D, Zhang L J, et al. Investigation on the dynamic characteristic of a new type of precision cropping system with variant frequency vibration[J]. International Journal of Mechanical Science, 2006, 48(12): 1333-1340.

[2]赵升吨, 雷净, 郝永江. 现代数控板材成形设备的现状[J]. 机械工人, 2006,(6): 10-14.

Zhao S D, Lei J, Hao Y J. Current situation of modern NC sheet forming equipment[J]. Mechanical Workers,2006,(6):10-14.

[3]Zhao S D, Ji W, Wang L H, et al. Iterative learning control of electro-hydraulic proportional feeding system in slotting machine for metal bar cropping[J]. International Journal of Machine Tools and Manufacture, 2005,45 (7-8): 923-931.

[4]王琛，双远华，王文豪，等. 不同工艺参数对于热锯机锯切性能的影响 [J]. 锻压技术，2020,45(5):133-139.

Wang C，Shuang Y H，Wang W H，et al. Influence of different process parameters on sawing performance for hot sawing machine [J]. Forging & Stamping Technology，2020,45(5): 133-139.

[5]郭继富, 韩会杰, 赵东岩,等. 金属冷热切圆锯片开裂、掉块原因分析及改进措施[J].轧钢, 2019, 36 (5): 93-96.

Guo J F, Han H J, Zhao D Y, et al. Causes analysis of cracking and falling problem of metal cold and hot cutting circular saw blade and its improvement measures[J]. Steel Rolling, 2019, 36(5): 93-96.

[6]赵升吨, 景飞, 赵仁峰,等. 金属管料下料技术概述[J]. 锻压装备与制造技术, 2015, 50 (2): 11-14.

Zhao S D, Jing F, Zhao R F, et al. Overview of metal pipe blanking technology[J]. China Metalforming Equipment & Manufacturing Technology, 2015, 50 (2): 11-14.

[7]Li W M, Cheng Z S, Gong Z Y. Study on design and key technology of high-speed precision shear[J]. Machinery Design & Manufacture, 2012,(5): 136-138.

[8]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.

[9]Li Y T, Yang C F, Wei Y B. The application of fracture for middle carbon steel in extra-low cycle inverse rotating bending fatigue loading[J]. Key Engineering Materials, 2004, 261-263: 1147-1152.

[10]李有堂, 魏庆同, 芮执元,等. 一种弯曲限制型应力断料装置[P].中国: 98201457.0, 2000-02-09.

Li Y T, Wei Q T, Rui Z Y, et al. A bending limiting stress cutting device[P].China: 98201457.0, 2000-02-09.

[11]赵升吨, 赵仁峰, 钟斌,等. 一种偏心套高速旋转式棒管料精密下料机[P].中国: 2012100 42371.7, 2012-02-23

Zhao S D, Zhao R F, Zhong B, et al. A precision cutting machine for high speed rotating rod pipe material with eccentric set[P]. China: 2012100 42371.7,2012-02-23

[12]Chen J, Wang Y, Yu D. The controlled fracture technique and its application in metalworking [J]. Engineering Fracture Mechanics, 1991, 39(1): 61-69.

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