论文部分内容阅读
为了降低管材压余分离工艺难度及提高管材产品成材率,研究了一种加尾垫热挤压成形工艺。以不锈钢316L作为尾垫,钼合金作为被挤压坯料,采用CAXA建立加尾垫挤压模型,设计了4种配合方式,并借助DEFORM-2D软件模拟分析了4种配合方式下挤压过程中的金属流动特征、挤压载荷曲线以及应力分布。模拟结果显示:当尾垫内孔小于或等于被挤压坯料内孔时,压余和管材能够实现自动分离;当尾垫内孔大于被挤压坯料内孔时,压余和管材不能实现自动分离,需要热锯分切。锥面配合的尾部尺寸稳定性要好于其他3种配合方式。最后以应用于液晶电子显示屏溅射靶材的钼管热挤压工艺生产实践为例,验证了尾垫与被挤压管坯等内孔挤压能够实现压余和管材的自动分离。
In order to reduce the difficulty of tube pressure separation process and improve the yield of pipe products, a hot extrusion forming process of tailing pad was studied. Using stainless steel 316L as the tail pad and molybdenum alloy as the extruded material, CAXA was used to establish the extrusion model of the tailing pad. Four kinds of mating methods were designed. With the help of DEFORM-2D software, Metal flow characteristics, extrusion load curve and stress distribution. The simulation results show that when the inner hole of the tail pad is less than or equal to the inner hole of the blank to be extruded, the pressure excess and the pipe can be automatically separated; when the inner hole of the tail pad is larger than the inner hole of the extruded blank, the pressure and the pipe can not be automatically Separation, the need for hot sawing cut. Tail with the tail of the dimensional stability is better than the other three kinds of coordination. Finally, the production practice of molybdenum pipe hot extrusion applied to the sputtering target of liquid crystal electronic display was taken as an example to verify the automatic separation of pressure pipe and pipe by squeezing the inner hole of the tail pad and the extruded tube.