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传统的预成形设计方法精度低、耗时、耗力,为了克服这些缺点,提高产品的质量和工作效率并降低生产成本,需对预制坯进行合理的预成形设计。本文根据能量最小原理和最小阻力原理,利用塑性变形过程中坯料的流动规律于静电场等势线分布类似这一特性,提出一种能够进行预成形设计的新方法-类等势场法,并采用该方法对粉末高温合金盘件进行预成形设计,从中优选出6组预成形形状,利用MSC/Superform商用软件对上述预制坯的等温成形过程进行数值模拟,得到6组粉末高温合金盘件终锻结束时各个部分的等效应变分布、预锻和终锻的变形程度分配以及模具型腔的受力情况。通过分析,选出最佳的设计方案。
The traditional method of preform design is low accuracy, time consuming and laborious. In order to overcome these shortcomings, improve the quality and work efficiency of the product and reduce the production cost, the reasonable preform design of the preform is required. In this paper, based on the principle of least energy and the principle of least resistance, this paper presents a new method that can be used to carry out preform design, which is based on the flow law of billet flow during plastic deformation and the equipotential distribution of electrostatic field. The pre-forming design of the powder superalloy disk was carried out by this method. Six pre-formed shapes were optimized. The isothermal forming process of the preform was simulated by using MSC / Superform commercial software. Six sets of powder superalloy disk parts were obtained Equivalent strain distribution of each part at the end of forging, distribution of deformation degree of pre-forging and final forging, and stress of the mold cavity. Through analysis, choose the best design.