锻压技术

倒挡惰轮闭式精锻成形工艺

英文标题：Closed precision forging process of reverse idler

分类号：TG312

出版年,卷(期):页码：2020,45(7):22-28

摘要：

针对倒挡惰轮锻坯在生产中出现的能耗大、材耗大、效率低等问题，提出倒挡惰轮闭式精锻成形工艺。闭式精锻成形工艺分为两个工步完成:工步1的成形力较大，使用常规锻造模具，既能保证模具强度，又可以完成大端镦粗及大端内外两侧环形凹槽的成形；工步2的成形力偏小，使用液压开合模具，用液压开合模具和机械锁模力将已成形的大端及杆部固定，再镦粗小端。常规锻造模具和液压开合模具配合使用，实现少余量、无飞边锻造。锻件产品的材料利用率比普通锻造工艺提高了20%~40%，人工操作生产效率约为100件·h-1。闭式精锻成形工艺下，经过批量生产的锻件产品符合要求，两个工步的模具强度也达到了生产要求。

For the problems of high energy consumption, high material consumption and low efficiency in the production of reverse idler forging billet, a closed precision forging process of reverse idler was proposed. The process of closed precision forging was divided into two steps. Forming force was larger in step 1, and the conventional forging die was used which could not only ensure the strength of die, but also complete the upsetting of big end and the forming of circular grooves on both sides of the big end. Forming force was smaller in step 2, by using the hydraulic opening and closing die and the mechanical clamping force, the big end formed and the rod were fixed, and then the small end was upsetting. The conventional forging die and the hydraulic opening and closing die can be used together to realize forging with less margin and no flash. Compared with the common forging process, the material utilization rate of forging products is increased by 20%-40%, and the production efficiency of manual operation is about 100 pieces per hour. Under the closed precision forging process, the forging products produced in batch meet the requirements, and the die strength of two steps also meet the production requirements.

基金项目：

国家科技重大专项（2019ZX04022001）

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

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