摘要
校直行程的精确计算是全自动校直机的关键技术。文中以矩形截面零件为研究对象,并假定为理想弹塑性材料,依据弹塑性力学理论,通过推导载荷、弯矩、挠度和弹性区长度间的关系,建立压力校直过程的载荷—挠度数学模型。实例计算表明,理论计算结果和有限元计算结果吻合良好。实验结果也证实理论计算具有足够的精确性。该模型有助于全自动校直机的研制。
It is important to calculate straightening stroke precisely for automatic straightening machines. The rectangular section part is selected for study and is assumed to be the ideal elastic-plastic material. Based on the elastic-plastic mechanics theory, through deriving relationships among load, bending moment, deflection and elastic region length, the mathematical load-deflection model of press straightening process is established. An example is given. The results calculated by the model are in good agreement with the results computed by finite element method （FEM）. Experimental data also shows that the calculation results by the model is exact and the error is small. So the validity and the accuracy of the model are verified. It will be helpful to the development of automatic straightening machines.
出处
《机械强度》
EI
CAS
CSCD
北大核心
2005年第5期636-639,共4页
Journal of Mechanical Strength
关键词
压力校直
数学模型
校直行程
有限元法
实验
Press straightening
Mathematical model
Straightening stroke
Finite element method
Experiment
