Development of Novel Plastic Working Method for Enlargement Partial Diameter on Shaft

1.提出了适用于实际尺寸轴类零件的扩径变形行为模型在自行研制的扩径加工机床上进行了扩径加工实验，测量了扩径变形行为，设计了扩径变形行为的表达模型。根据加工条件、直径、轴材料等加工影响因素，2.提高扩径加工性能的热处理方法的提出我们对中碳钢进行了适当的热处理，以获得适合扩径加工的细小均匀组织。结果表明，获得了强度和韧性平衡最好的材料，提高了工艺稳定加工的可靠性标准。此外，我们建议 ...更多信息 一种更有效的高频感应加热扩径加工方法。3.扩径加工实验和强度验证实验的实施我们对每种样品材料中从实验尺寸到实际尺寸的直径范围内的多个轴进行了扩径加工实验和强度验证实验。我们已经证实了有效性的处理方法和合理性的疲劳损伤，不仅实验，而且分析。此外，还从减轻轴重量的角度出发，通过实验阐明了该加工方法在空心轴上应用的可能性。4.加工方法分析方法的开发利用有限元通用程序MSC.马克加工过程的模拟分析与实验结果吻合较好，验证了该方法的正确性和有效性。5.加工方法基础数据库的建立通过实验和有限元模拟分析，阐明了加工条件对各试样材料的扩径行为和强度可靠性的影响。并构建了基于该加工方法的基本加工数据库。少

We have advanced steadily the research project and got excellent results as follows.1.Proposition to model deformation behavior of diameter-enlargement with applicable to shaft of practical sizeWe have carried out diameter-enlargement processing experiments with the processing machine developed originally, measured diameter-enlargement deformation behaviors, and designed expression model of the behaviors. The diameter-enlargement deformation behaviors, according to processing influence factors, i.e. processing conditions, diameter, shaft material etc., come to be estimated by the model.2.Proposition of heat-treatment method to improve workability of diameter-enlargement processWe have heat-treated properly to medium carbon steel in order to obtain a minute, homogeneous organization appropriate for the process. As the results, we have obtained material with best balance of strength and toughness, and improved sound criteria of stable machining to the process. Moreover, we have proposed … More a more effective diameter-enlargement processing method by high frequency inducement heating.3.Execution of diameter-enlargement processing experiment and strength verification experimentWe have conducted diameter-enlargement processing experiments and strength verification experiments on many shafts in diameter range from experimental size to practical size in each sample material. We have confirmed effectiveness of the processing method and soundness to fatigue damage not only experimentally but also analytically. Moreover, we put lightening shaft in view, and have experimentally clarified the application possibility of the processing method to hollow shaft.4.Development of analytical method for the processing methodWe have developed a thermal-stress coupled analysis method by using user subroutines of finite element method general-purpose program MSC. Marc. Validity and effectiveness of the method have been confirmed from the good simulation analysis on processing process agreement with the experiment results.5.Construction of basic data base concerning the processing methodWe have clarified the influence of processing conditions on the diameter-enlargement behavior in each sample material and the strength reliability based on both the experiment and the finite element method simulation analysis, and constructed a basic processing data base on the processing method. Less