拉刀螺旋前刀面刃磨砂轮安装姿态计算方法

发布时间：2018-04-01 18:34

本文选题：螺旋拉刀　切入点：刃磨　出处：《西安交通大学学报》2017年02期

【摘要】：为了精确地对拉刀螺旋前刀面进行刃磨并保证良好的加工质量,提出了一种砂轮安装位置及姿态的计算方法。该算法通过空间包络原理计算砂轮磨削接触线,并给出接触线分布位置约束,以两个接触点进行前角定义,从而将满足磨削工艺要求的砂轮安装位置和姿态求解转换为一个非线性方程。然后,根据前刀面螺旋角分布规律指出,砂轮的安装摆角应远离前刀面对应的螺旋角范围,从而将该非线性方程转换为两个单变量的搜索问题,通过牛顿-拉夫逊等方法实现快速求解。研究结果表明,较大的砂轮尺寸或砂轮安装摆角对应较大的砂轮安装倾角,因此建议采用贴近前刀面螺旋角的砂轮安装摆角以回避刃磨中砂轮与前一切削齿之间的干涉。基于VERICUT的仿真结果证明,该方法计算出的砂轮安装位置与姿态能够保证螺旋前刀面得到准确磨削。
[Abstract]:In order to sharpen the helical front face of broach accurately and ensure good machining quality, a method for calculating the position and attitude of grinding wheel installation is presented.In this algorithm, the grinding contact line of grinding wheel is calculated by the principle of space envelope, and the position constraint of contact line distribution is given, and the front angle of two contact points is defined.Thus, the position and attitude of grinding wheel which meet the requirements of grinding process are transformed into a nonlinear equation.Then, according to the distribution law of helical angle of the front cutter face, it is pointed out that the installation angle of the grinding wheel should be far from the range of the spiral angle corresponding to the front cutter surface, so that the nonlinear equation can be transformed into a search problem of two single variables.The fast solution is realized by Newton-Raphson method.The research results show that the larger grinding wheel size or the grinding wheel mounting angle correspond to the larger grinding wheel installation inclination angle. Therefore, it is suggested that the grinding wheel close to the helical angle of the front cutter face be used to avoid the interference between the grinding wheel and the former cutting tooth in order to avoid the interference between the grinding wheel and the former cutting tooth.The simulation results based on VERICUT show that the position and attitude of the grinding wheel calculated by this method can ensure the accurate grinding of the helical front cutter surface.
【作者单位】：西安交通大学机械制造系统工程国家重点实验室;
【基金】：国家科技重大专项资助项目(2015ZX04014021)
【分类号】：TG715;TG580.6

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