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局部偏心形状零件结构比较复杂,广泛应用在机械传动中。本文根据该偏心形状零件结构特点,制定了冷温复合精密塑性成形工艺方案。重点设计了偏心冷镦挤预成形工序及温镦挤终成形工序,设计了偏心镦挤和等温镦挤模具,选择了合理的坯料润滑、模具预热及冷却条件,并进行了偏心形状零件的精密塑性成形实验。实验结果表明,采用该工艺及模具可以生产出尺寸精度较高及力学性能优良的偏心形状零件,且材料消耗少、生产效率高,具有较高的经济实用价值。
Partial eccentric shape parts structure is more complex, widely used in mechanical transmission. According to the characteristics of the eccentric shape of the structure of parts, developed a cold temperature composite plastic forming precision process. Focusing on the design of eccentric cold heading extrusion preforming process and warm heading extrusion final forming process, the design of eccentric upsetting extrusion and isothermal upsetting extrusion die, select a reasonable blank lubrication, mold preheating and cooling conditions, and eccentric shape parts Precision plastic forming experiment. The experimental results show that the method and the die can produce the eccentric shape parts with high dimensional accuracy and excellent mechanical properties with less material consumption, high production efficiency and high economic and practical value.