端面蜗形凸轮加工技术研究

介绍DMU 70eVolution高速五轴联动加工中心加工圆柱凸轮的数控加工方法 .分析研究圆柱凸轮的加工原理 ,导出数控加工程序的数学模型 ,解决了加工凸轮时不能使用刀具半径自动补偿的难题。     

面向数控加工的圆柱分度凸轮刀具轨迹计算与模拟

介绍圆柱分度凸轮数控加工的方法,面向数控加工,从圆柱分度凸轮机构运动关系的角度出发,直接建立圆柱分度凸轮的刀具运动轨迹方程,给出在AutoCAD上实现圆柱分度凸轮NC加工的动态模拟和三维几何造型的过程,该方法可直接应用于生产实际。     

空间凸轮数控加工进给速度修正及编程

推导了空间凸轮数控加工中不同联动控制场合刀具实际进给速度和编程进给速度的关系,分别结合圆柱凸轮和弧面齿轮数控加工中的特点在编程中对进给速度进行修正,使刀具实际进给速度保持均匀,从而使凸轮加工质量明显提高。     

数控铣削圆柱凸轮的刀具轨迹仿真

介绍圆柱凸轮数控加工时的刀具轨迹仿真方法，利用所研制的软件已成功地在个人计算机上实现圆柱凸轮数控铣削时的刀具轨迹仿真。     

空间凸轮的精密加工和非等径数控加工刀位控制新方法

以偏置直杆圆锥滚子从动件圆柱凸轮数控加工为例，讨论了空间凸轮的精密加工问题。分析了刀具误差引起的凸轮轮廓法向误差的主要原因。为了减小刀具误差对凸轮轮廓法向误差的影响，提出了一种非等径数控加工刀位控制新方法。     

圆柱凸轮数控加工的几个关键问题

通过改进圆柱凸轮数控铣削加工编程方法，降低了圆柱凸轮的加工成本并能满足凸轮槽宽的高精度要求；通过对各个数控加工程序段编程进给速度的修正，使得刀具的实际进给速度为恒速，明显改善了凸轮槽的工作表面粗糙度。     

空间凸轮数控加工刀具控制新方法

以偏置直杆圆锥滚子从动件圆柱凸轮数控加工为例,分析了刀具误差引起的凸轮轮廓法向误差的主要原因。为了减小刀具误差对凸轮轮廓法向误差的影响,介绍了一种控制刀具的新方法,同时给出了简便而精确的计算公式。     

基于Vericut的圆柱沟槽凸轮的加工仿真

根据圆柱沟槽凸轮传动机构的运动原理,应用Vericut软件对圆柱沟槽凸轮进行数控仿真加工.首先根据主动件和从动件的运动机制确认其运动参数,其次根据运动关系模拟实际情况建立机床、毛坯以及刀具模型,然后计算刀具在凸轮上的运动数据编写初加工和精加工程序,最后得出仿真加工结果,确认其正确性并输出加工程序.     

圆柱凸轮数控加工工艺技术研究

阐述了圆柱凸轮数控加工工艺的技术方法，重点对圆柱凸轮的加工方法、装夹、工艺路线的制定、加工参数选择、机床反向间隙补偿、圆柱凸轮廓面检测等工艺环节进行了分析研究，并在DMU70V加工中心上完成了圆柱凸轮的数控加工，提高了圆柱凸轮的加工品质。     

圆柱凸轮三维参数化设计与数控加工

凸轮机构优良的运动特性和动力特性由精确的轮廓曲面来保证,圆柱凸轮轮廓曲面因从动件运动规律的变化而成不同的复杂空间曲面,给圆柱凸轮精确设计和加工造成了困难。通过对圆柱凸轮轮廓曲面的分析,完成了基于Pro/E系统的圆柱凸轮三维参数化设计,并利用Pro/NC数控加工模块对圆柱凸轮进行了数控加工仿真,自动生成驱动数控机床进行零件数控加工的Numerical Control G代码。     

The actual geometry of the cutting tool involved in machining

Understanding actual geometry of the cutting tool involved in machining is critical to the investigation of the mechanism of cutting process. According to control pattern of the flank and the insert shape, the cutting tools are classified into four different types in this paper including S- and non-S-shaped tools with cylindrical control and conical control. By establishing all the four kinds of tools’ 3-D models, the actual geometry of the cutting tool can be obtained. Research results suggest that the actual geometry involved in machining of the S-shaped inserts whether with cylindrical control or conical control is sphere; non-S-shaped with cylindrical control tools is ellipsoid while non-S-shaped with conical control is paraboloid.     

基于两重包络原理的圆柱凸轮加工刀位控制方法研究

以对心直动圆柱滚子从动件槽形圆柱凸轮为例,应用共轭曲面理论研究基于两重包络原理的加工圆柱凸轮廓面的刀位控制方法,推导出圆柱凸轮实际廓面方程及基于两重包络原理的非等价加工圆柱凸轮廓面的刀具创成廓面方程,并对理论加工误差进行了分析.     

基于Pro／E Wildfire3．0的蜗杆三维建模及参数化设计

介绍在Pro／E环境下实现渐开线圆柱蜗杆的参数化设计,给出控制该蜗杆尺寸的主要参数,提供了模型尺寸的关系式,当用户对主要参数进行修改后,通过再生处理即获得新的模型。以Pro/Pmgram模块为开发工具,进行渐开线圆柱蜗杆的三维参数化程序设计,为该产品的进一步设计、分析和制造提供了依据。     

A study on helical surface generated by the primary peripheral surfaces of ring tool

Often in the engineering practice, cutting tools bounded by primary peripheral surfaces of revolution are used because of their effectiveness. Among these, ring and tangential tools can be used for the generation of constant pitch cylindrical helical surfaces. In this paper, we present an algorithm for the profiling of these types of tools. The algorithm is based on the topological representation of the tool’s primary peripheral surface. The main goal is to devise a methodology for the profiling of tools whose surfaces are reciprocally enveloping with cylindrical helical surfaces. We present a numerical example for the numerical determination of the axial section form for this type of tools. The application method for this algorithm was developed in the CATIA graphical design environment within which the procedure is developed as a vertical application. In addition, we present a solution for the shape correction of the tool’s axial cross-section by considering the existence of singular points on the profile of the helical surface to be generated where multiple normals to the surface exist.     

圆柱齿轮滚切倒棱刀具设计

针对实际生产中圆柱齿轮的高速齿廓倒棱需求,提出了连续切削的滚切倒棱新方法,完成了滚切倒棱刀具廓形设计。首先参考圆柱齿轮滚齿加工运动,建立刀具与齿轮的初始位置关系及刀具安装位姿坐标系,并通过倒棱参数与所建的安装位姿坐标系计算刀具安装位姿参数;其次根据倒棱运动及刀具安装位姿,建立空间运动坐标系并推导坐标系间的变换关系,通过连续求解刀具前刀面与齿轮倒棱目标廓形的接触点,提出刀具廓形计算方法;最后选取某型号的圆柱斜齿轮为倒棱对象,利用切削仿真软件完成齿轮及滚切倒棱刀具的三维建模,通过编写仿真运动程序实现倒棱切削仿真,在此基础上利用倒棱机床进行加工实验。仿真及实验结果表明,所设计的倒棱刀具能够满足圆柱齿轮的高效齿廓倒棱需求,也验证了刀具廓形计算方法的正确性。     

圆柱凸轮侧向传动机构圆柱凸轮廓面研究

重点介绍了一种新型无齿减速器,结合图解法与解析法并利用简单的空间几何与运动方法,对无齿减速器的核心传动件圆柱凸轮侧向传动机构廓面进行研究。利用半径为Rj的圆柱面截取凸轮的螺旋面得到圆柱面上螺旋线,求解螺旋线方程。通过对圆柱面半径Rj在一定区间范围内连续取值,利用连续变化螺旋线反求螺旋面方程。再利用该方程通过数学工具Mathematica进行圆柱凸轮螺旋线求解与圆柱凸轮轮廓造型。通过数控机床对样品进行试制从而验证研究的可行性。结果表明：圆柱凸轮廓面计算实际可行,圆柱凸轮侧向连续传动机构传动平稳。     

Development of magnetorheological fluid-based process for finishing of ferromagnetic cylindrical workpiece

A magnetorheological fluid-based process is developed for the internal surface finishing of ferromagnetic cylindrical workpiece. The existing finishing processes based on magnetorheological fluid are not equipped to finish the internal ferromagnetic cylindrical surface significantly as it obtained higher magnetic flux density than the MR polishing fluid. At present, magnetorheological fluid-based finishing tools are designed to ensure the maximum magnetic flux density always present on the outer finishing tool core surface as compared to internal surface of ferromagnetic cylindrical workpiece surface. To validate this present principal idea, the magnetostatic finite element analysis has been performed on the newly designed finishing tools. The preliminary experiments have also been conducted to evaluate the finishing performance with the two newly designed finishing tools. The percentage reduction in surface roughness (R_a) values with I-shaped tool core is found as 65–78% after 150 min of finishing, whereas, with rectangular shaped tool core is found as 78–81% after 90 min of finishing. The results clearly revealed that the present finishing tool with rectangular shaped core is more suitable for uniform significant finishing of ferromagnetic cylindrical internal workpiece than the I-shaped core. The developed process can be useful in finishing of cylindrical mold and dies, hydraulic cylinder, barrel for injection molding, etc.     

基于曲线拟合修正的圆柱端面凸轮数字化设计

提出一种利用曲线拟合技术进行圆柱端面凸轮数字化设计的方法。该方法根据圆柱端面凸轮的结构特点、工作特性,提出先离散运动曲线,再运用Catmull-Rom三次插值曲线进行拟合,最后运用UG软件的二次开发工具和交互技术,对圆柱端面凸轮进行数字化实体建模。该方法修正了凸轮运动曲线连接处的冲击问题,对建立其他复杂圆柱凸轮数字化模型具有一定的参考价值。     

Synthesis of worm transmissions on the basis of a standard generating worm

The synthesis of cylindrical worm gears is considered, in the case where the generating worm consists of standard worm cutters for cylindrical gears. Standardization of the dimensions of the initial and generating worms simplifies the manufacture of worm pairs and increases production efficiency by reducing the range of gear-cutting tools.     

车削中心极坐标与柱面编程的应用浅析

随着现代加工技术的发展,使多功能复合型数控机床得到越来越广泛的使用。车削加工中心是一种在数控车床的基础上增加了铣削加工功能的车铣复合型数控机床。文中以Vturn-26CV车削中心为例,对其结构与功能进行了剖析,并对其中极坐标插补与柱面插补的应用进行详细的分析。