运用DEFORM对杆-杆复合挤压成形过程进行数值模拟,得到挤压过程中的应力、应变关系、载荷曲线,并分析其机理。比较不同摩擦因子下,坯料的载荷和上、下杆高比对于金属流动状况的影响。最终根据模拟结果得出有效提高挤压效率,减少挤压缺陷的建议。 Using DEFORM to simulate the process of rod-rod compound extrusion, the stress, strain and load curve are obtained and the mechanism is analyzed. The influence of different friction factors, the load of billet and the upper and lower rod height ratio on the metal flow conditions were compared. Finally, according to the simulation results, it is concluded that the extrusion efficiency is effectively improved and the extrusion defects are reduced.