Transactions of Materials and Heat Treatment

Title：Multi-station closed precision forging process for six-inch flange

Authors：

Unit：

KeyWords： flange closed precision forging process automatic production multi-station die cavity structure

ClassificationCode：TG316

year,vol(issue):pagenumber：2021,46(6):58-63

Abstract：

Key problems and analysis on the closed precision forging process and the automatic production of 3-6 inch flanges (Φ150-Φ300 mm) were mainly introduced. First, according to the characteristics of forgings, the machining allowance of forgings was designed to be 1-2 mm (excluding the allowance due to increase of draft angle), and the forging process was determined as heating, pre-forging, final forging and punching. Then, the pre-forging shape was analyzed and optimized, and the causes of forging defects were analyzed by comparing simulation results and actual situation. Furthermore, by optimizing the cavity structure of final forging die, the defects of inner hole edge for pre-forging part that could not be improved were compensated. Finally, the factors affecting the continuous production in the design of die were analyzed, and the solutions were proposed. The result shows that the designed flange multi-station closed precision forging process produces qualified precision forgings of flange, and the die life meets the requirements of automatic production. In addition, the stable production cycle is 60-90 pieces per hour depending on the weight of product.

Funds：

国家科技重大专项（2019ZX04022001）

闫红艳（1979-），女，硕士，正高 E-mail：yanhongyan2013@126.com

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