Transactions of Materials and Heat Treatment

Title：Structural design on progressive die for connecting plate with tapping and slider bending

Authors： Liu Biyun

Unit： Human Resources Department Guangdong Mechanical Technician College

KeyWords： connecting plate progressive die upward flanging tapping mechanism slider bending

ClassificationCode：TG385

year,vol(issue):pagenumber：2024,49(11):149-154

Abstract：

The structure of connecting plate and its stamping process were analyzed, and for the flanging threaded hole, in order to improve the efficiency of tapping, a tapping mechanism was installed on the progressive die. Then, the screw tap in the tapping mechanism was driven to rotate by utilizing the upward and downward movements of upper die, and the flanging threaded hole on the product was tapped, eliminating the separate tapping process for the flanging threaded holes by tapping machine. Furthermore, due to the small inner diameter of the flanging threaded hole, and in order to prolong the life of flanging punch, the end of flanging punch was designed with an elliptical pointed shape. For the structure where the reinforcing ribs at the bending feature root were almost on the same vertical line as the flanging threaded holes, and in order to prevent the springback after bending, a slider bending mechanism was designed. Finally, in order to overcome the springback phenomenon, the stamping process of pre-bending and bending was adopted. In addition, in order to prevent the hole shape from being affected during the stamping process of reinforcing ribs, one of the punching process was arranged after the stamping process of reinforcing ribs.

Funds：

作者简介：刘碧云（1974-），女，硕士，正高级讲师 E-mail：261756927@qq.com

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