机床基础大件振动时效工艺参数优化方法

摘要

通过模态仿真的方法得到了最佳的振动时效工艺参数，在此基础上选取相同的机床床身铸件作为实验对象，对新工艺和原工艺下的平均应力消除率进行了对比。实验结果表明，新工艺下床身铸件的平均应力消除率为65·1%，原工艺的平均应力消除率为38·5%，另外，原工艺下，有个测点的应力值没有减小反而增大。新工艺下铸件的应力消除率明显大于原工艺下铸件的应力消除率，验证了所提出的振动时效工艺参数优化方法的正确性。%A new method of achieving the best process parameters of VSR through modal simula-tion was proposed herein.Then the average stress elimination rate of the new process and the original process on the bed casting was compared.The experimental results show that,the average stress elimination rate of the new technology is as 65·1%,while the original process is as 38·5%.Besides, the stress value of one test point under the original process condition increases instead.The stress elimination rate of the new process is higher than that of the original process.The results verify the correctness of the optimization method of VSR process parameters for large machine tool body.