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Title:Design on forming die of spherical stainless steel plate for bridge bearing
Authors: Zhao Liangang Liu Sheng Liang Xu 
Unit: Wuhan Hirun Engineering Equipment Co.  Ltd. 
KeyWords: bridge bearing  spherical stainless steel plate  stamping  spherical profile degree  blank holder installation 
ClassificationCode:TG352
year,vol(issue):pagenumber:2020,45(6):152-157
Abstract:

The forming technology of spherical stainless steel plate for bridge bearing was studied, and the structural characteristics and forming process of spherical stainless steel plate were analyzed. Then, the balance control laws of wrinkling and cracking in the compound forming process of drawing and bulging were studied, and the key process parameters which affect forming, such as drawing coefficient, were analyzed. Furthermore, the rigid blank holder installation was designed, and the blank holder force, press tonnage, radius and clearance of punch and die were calculated. Finally, the  forming die of spherical stainless steel plate was designed to meet the requirements. The results show that after trial die correction, the average profile degree of twelve spherical stainless steel plate products formed by the forming die of spherical stainless steel plate  with the diameter of punch reaching Φ2200 mm is 1.78 mm, and the maximum difference of profile degree is controlled within 1 mm. Thus, the quality of forming is stable, and after being pressed with the spherical surface of bearing steel parts, the profile degree is less than 0.6 mm to meet the standards and design requirements.

Funds:
AuthorIntro:
赵连刚(1992-),男,硕士,工程师 E-mail:cugzlg1992@163.com
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