锻压技术

热拉深工艺在薄壁法兰中的应用

英文标题：Application of hot drawing process in thin-walled flange

分类号：TG316.3;TG356.51

出版年,卷(期):页码：2022,47(5):45-51

摘要：

为了解决使用普通胎膜锻工艺生产的薄壁法兰锻件伴有的内孔加工余量大、材料浪费严重等问题。从理论上分析了热拉深工艺的成形特点，总结了其金属填充规律，预测了主要成形缺陷，并根据理论分析结果设计出薄壁法兰的制坯和成形模具及热拉深成形工艺。采用有限元模拟软件对成形过程进行仿真，分析了变形过程中速度场和载荷的变化规律。经过生产试制，发现使用热拉深工艺生产出的法兰产品的外观、尺寸均符合工艺要求。相比与普通胎模锻工艺，热拉深工艺生产的产品在宏观方面，单件下料重量减少约430 kg，并节约机加工工时约20%；在微观方面，其内部组织更加细密、均匀，且通过超声波探伤，内部质量良好，符合设计要求。为薄壁法兰的生产提供了一种新方法。

In order to solve the problems of large machining allowance of inner hole and serious material waste for thin-walled flange forgings produced by ordinary loose tooling forging process, the forming characteristics of hot drawing process were analyzed theoretically, the metal filling law was summarized, and the main forming defects were predicted. Then, according to the theoretical analysis results, the blanking and forming moulds of thin-walled flange as well as hot drawing process were designed. Furthermore, the forming process was simulated by finite element simulation software, and the variation laws of velocity field and load in the deformation process were analyzed. After trial production, it is found that the appearance and sizes of flange products produced by the hot drawing process meet the process requirements. Compared with the ordinary loose tooling forging process, in the macroscopic aspect the blanking weight of the products produced by the hot drawing process is reduced by about 430 kg and the machining time is saved by about 20%. However, in the microscopic aspect, its internal structure is more fine and uniform, and through ultrasonic flaw detection, the internal quality is good and meets the design requirements. Thus, it provides a new method for the production of thin-walled flange.

基金项目：

中国石油天然气集团有限公司关键核心技术攻关项目（2021ZG08）

作者简介：王金鹏（1986-），男，学士，工程师，E-mail：1091295398@qq.com

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