Transactions of Materials and Heat Treatment

Title：Test study on new type low stress cracking precision blanking device

Authors： Yu Zhengyang1 Zhong Bin1 Li Jin2 Zhang Chuanwei1

Unit： 1. School of Mechanical Engineering Xi′an Universit y of Science and Technology 2.Xianyang BOMCO Steel Tube & Wipe Rope Co. Ltd.

KeyWords： metal bar low stress precision blanking load control curve stress concentration blank section

ClassificationCode：

year,vol(issue):pagenumber：2022,47(3):125-129

Abstract：

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.

Funds：

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

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