Transactions of Materials and Heat Treatment

Title：Influence of supporting internal pressure on hydroforming for a certain type high-strength steel torsion beam

Authors：

Unit：

KeyWords： hydroforming supporting internal internal pressure bending moment torsion beam thickness distribution dent depth

ClassificationCode：TG394

year,vol(issue):pagenumber：2021,46(6):112-116

Abstract：

The influences of different process parameters on hydroforming results for DP780 high-strength steel torsion beam were researched by numerical simulations and experiments to improve the forming quality of parts, and the theory proved that the clearance between upper die and tube (dent depth of tube) in the V-shaped area had an important influence on the forming quality of parts after hydroforming. Therefore, the supporting internal pressure process was used in the pre-forming process, and the influences of different supporting internal pressures on the forming results were discussed. The results show that in the pre-forming process, the forming within an appropriate supporting internal pressure range can effectively improve the thickness distribution. In the hydroforming process, the influence of supporting internal pressure on tube formability during axial feeding was analyzed. Thus, the proper supporting internal pressure can avoid wrinkles on the tube end and effectively improve the thickness distribution near the tube end. Finally, the qualified torsion beams are manufactured by hydroforming process.

Funds：

国家科技重大专项资助项目（2019ZX04002030）

张岩红（1986-），女，硕士，讲师 E-mail：sjzcjzyh@163.com

Reference：

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