6+2管材矫直机辊型曲线设计与矫直精度分析

Roller Curvature and Straightening Precision on Six and Two-Roller Tube Straightener

为了改进管材矫直机的矫直质量,以材料力学和金属弹塑性理论为基础,深入研究了普通六辊矫直机和二辊矫直机的矫直过程,反映出六辊矫直机存在空矫区,不能矫直管材头尾,对此提出了一种新型复合管材矫直机,即6+2管材矫直机,可以实现管材全长高精度矫直。通过Matlab求解辊型曲线,并绘制了相应的辊型图,通过理论计算得出了辊型曲线的理想矫直精度。采用有限元软件Marc建立了6+2管材矫直机的有限元模型,并对整个矫直过程进行模拟。在理论分析和数值计算的基础之上,分析了具有一定原始曲率的管材在矫直后的直线度和圆度,证明了此矫直机的矫直能力,为提高管材矫直质量提供了一种新型矫直机。

In order to improve the straightening quality of pipe straightening machine, based on mechanics of materials and metal elastic-plastic theory, the straightening process of ordinary six-roller straightening machine and two- roller straightener was investigated, and both the advantages and the shortcomings of pipe precision straightening was proposed. A new type of composite pipe straightening machine, six and two pipe straightening machine was presented. A roller-shaped curve and its roll graph were analyzed through Matlab, and theoretical ideal roller curve straightening accuracy was also calculated. Finite element model of the 6＋2 pipe straightening machine was built using the finite element software Marc, and the entire straightening process was simulated. On basis of theoretical analysis and numerical calculation, a certain original curvature of the pipe after the straightening of straightness and roundness was analyzed to prove a leveler straightening ability. A new straightening machine was present to improve the quality of pipe straightening.