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在突缘叉锻造成形过程中,上模模腔底部容易开裂,导致锻件出毛刺,增加生产风险。利用Deform软件分析了突缘叉锻造成形过程的金属流动规律和模腔开裂原因。结果表明:模腔凸台在冲击载荷下出现应力集中并导致模具断裂失效。通过在模具上添加预应力环以抵消模具所受冲击载荷、降低模具应力,并利用Solid Works软件计算了预应力。优化结果表明:采用组合模具结构时,模具与应力环最大预应力分别为480和420 MPa,均处于安全范围内。模具原始开裂位置应力降低了约950 MPa,生产过程中,模具始开裂前锻件的产量由200件左右提高到2700件左右。
In the forging fork flange forming process, the bottom of the mold cavity is easy to crack, resulting in forging a burr, increase production risk. Deform software was used to analyze the metal flow rule and reason of cavity cracking in forging process of flange forging. The results show that the stress on the boss of the cavity under the impact load causes failure of the die fracture. The prestressing force was calculated using SolidWorks software by adding prestressing rings to the die to counteract the impact load on the die, reducing the die stress. The results of optimization show that the maximum prestressing force of the die and the stress ring is 480 and 420 MPa, respectively, in the safe range when using the combined die structure. The original cracking stress of the mold is reduced by about 950 MPa. During the production process, the output of the forging before cracking begins to increase from about 200 to about 2700 pieces.