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采用机加工生产的柱塞泵滑靴零件,材料浪费严重、废品率高、抗拉强度及耐磨性较低,而改用冷挤压成形工艺可显著解决上述问题。但由于滑靴零件具有薄壁内凹球面结构,挤压过程中产生的残余应力、内球面及柱面的回弹,将使其产生裂纹及变形。通过QFORM-3D软件的模拟结果,改进实验工艺方案,有效降低实际成形的平均应力、成形力及回弹量,保证了内凹球面的尺寸精度和模具结构设计的合理性。
The production of piston pump piston pump parts, serious material waste, reject rate, tensile strength and wear resistance is low, and switch to cold extrusion forming process can be a significant solution to the above problems. However, due to the sliding shoe parts with thin concave spherical surface structure, the residual stress generated during extrusion, the inner sphere and cylinder rebound will cause cracks and deformation. Through the simulation results of QFORM-3D software, the experimental process scheme is improved to reduce the average stress, forming force and springback of the actual forming, which ensures the dimensional accuracy of the concave spherical surface and the rationality of the mold structure design.