六辊薄壁管材矫直机参数设计与仿真分析

Parameter Design & Performance Simulation of Six Roll Thin-walled Tube Straightening Machine

以原有的六斜辊矫直机为基础进行了辊型的改进,将第二对的双曲线辊型设计为凹凸辊,并针对薄壁管特性设计相应的辊型参数。在以往矫直机设计中,矫直辊的压下行程和压下量都是人工调整,这就大大降低了工作效率,而且矫直精度也不是很高。通过在压下系统中安装伺服机构可以实现自动补偿机架变形,保证机架能稳定工作,从而使被矫直的薄壁管材具有较高的矫直精度。通过对原有矫直力学模型的分析和计算,建立一种适合等曲率反弯辊型的力学简化模型。在ANSYS有限元软件中模拟薄壁管材的矫直过程,进行了管材变形仿真分析。通过仿真分析判断薄壁管材在矫直过程中能否正常运转。

This improvement of the roller type is based on the design of the original 6 skew rollers. The second pair of hyperbolic rollers are concavo-convex rollers,and the corresponding roller type parameters are designed according to the characteristics of the thin-walled tube. In the past,the straightening roller pressure stroke and pressure reduction can be adjust manually,which reduces the work efficiency greatly. The innovation of this design is the design of servo-driven. The servo mechanism can adjust the stroke down automatically,to compensate for the deformation of the rack,so that the rack can work stably. So the thin-walled tube can be straightened with high precision straightening. At the same time,this design also retains the manual adjustment structure. In the ANSYS finite element software,through the simulation of thin-walled tube straightening process,it can obtain the pipe deformation,and through the simulation analysis to determine whether the normal operation of the thin-walled tube in the straightening process.