离散型空间焊道CBN砂带当量随行磨削技术

发布时间：2018-03-21 06:12

本文选题：当量随行磨削　切入点：等余量控制　出处：《机械工程学报》2015年09期 　论文类型：期刊论文

【摘要】：提出一种离散型空间(椭圆形、马鞍形、相惯线形等)焊道的磨削加工技术——立方氮化硼(Cubic boron nitride,CBN)砂带当量随行磨削方法,该方法一方面基于测量技术以及磨削量预测模型,利用四轴联动以及恒压力浮动砂带磨削技术实现离散型空间焊道当量随形磨削加工,保证焊道的等余量控制;另一方面针对焊道材料的难加工特性,运用CBN砂带实现高效率、高精度磨削加工。阐述了当量随行磨削加工原理,建立随行磨削加工模型,分析随行运动误差。基于测量技术以及磨削量预测模型,建立当量磨削控制方程。针对椭圆形焊道典型零件——燃烧室机匣进行了磨削加工试验,得到其磨削余量厚度误差在±0.005 mm以内,证明该方法的可行性,得到焊道磨削的最优工艺(砂带线速度24 m/s,磨削压力170 N,工件转速1r/min),并且得到工件旋转速度是影响材料去除率最大的工艺参数。
[Abstract]:In this paper, a discrete space (ellipse, saddle, inertial line) welding pass grinding technology, cubic boron nitridec belt equivalent grinding method, is presented. The method is based on measuring technology and grinding quantity prediction model. Four axis linkage and constant pressure floating belt grinding technology are used to realize the discrete spatial weld equivalent conformal grinding to ensure the equal margin control of the welding pass. On the other hand, aiming at the difficult processing characteristics of the weld material, the CBN abrasive belt is used to achieve high efficiency. This paper expounds the principle of equivalent accompanied grinding, establishes the model of accompanying grinding, analyzes the accompanying motion error, and based on the measurement technology and grinding quantity prediction model, The control equation of equivalent grinding is established. The grinding experiment is carried out for the typical elliptical welding pass part-combustion chamber casing. The grinding allowance thickness error is less than 卤0.005 mm, which proves the feasibility of this method. The optimum grinding process (24 m / s of belt speed, 170 N of grinding pressure, 1 r / min of workpiece rotational speed) is obtained, and the process parameter of workpiece rotation speed is the biggest affecting material removal rate.
【作者单位】：重庆大学机械工程学院;重庆大学重庆市材料表面精密加工及成套装备工程技术研究中心;
【基金】：国家自然科学基金资助项目(51275545)
【分类号】：TG580.6

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