特种回转面刀具的生成原理与计算机仿真

本文研究了等螺旋角特种回转面刀具的生成原理，导出了工艺系统非线性运动函数方程组及其解。并对加工过程进行了计算机模拟，为特种回转面刀具的计算机辅助设计作了初步探索。     

斜刃异形刀具的成形理论与计算机仿真

本文研究了带斜刃的特种回转面刀具的几何结构和生成原理,并在ＳＵＮ工作站上利用Ｊｄｅａｓ软件模拟了实际加工过程,为特种回转面刀具的计算机辅助设计作了初步探索。     

特种回转面刀具上的刀刃曲线

本文导出了特种回转面刀具上的等螺旋角螺旋线的通用表达式,为这种刀具的设计、计算、制造和计算机辅助设计带来了方便。     

特种回转面刀具成形数学模型

1．引言随着模具加工技术的发展，特种回转面刀具得到广泛的应用。特种回转面刀具是外轮廓母线复杂特殊的一类回转体刀具。目前国内只有少数厂家具有该类刀具的生产能力。文献［1］［2］分析了特种回转面刀具成形原理，且推出了工艺系统运动方程及其解法。文献[1]中作者设计了专机；文献[2]到中只有借助于五维数控机床才能实现加工。可见，该类刀具的数学模型复杂且较难实现。本文试图在满足加工要求的前提下，建立成形较为简单的特种回转面刀具数学模型，使普通机床只要稍加改造便可生产这类刀具。2．特种回转面对具成形原理假设在回转体上…     

特种回转面刀具螺旋槽的通用几何模型

针对数控磨削螺旋槽的特点 ,提出了基于一般特种回转面刀具刀刃曲线和刀面截形的螺旋槽通用几何模型。该模型采用统一的形式表示螺旋槽 ,为特种回转面刀具的设计和数控加工提供了理论基础。该模型也适用于其它类型的回转刀具     

圆柱面曲线型镶嵌式特种回转面刀具

圆柱面曲线型镶嵌式特种回转面刀具湖北工学院（４３００６８）刘鹄然华中理工大学（４３００１２）胡庆夕１．引言特种回转面刀具是外形比较复杂的回转面刀具，包括螺旋锥铣刀、螺旋指状齿轮铣刀、球头端铣刀及其它异型刀具，主要用于复杂曲面（如叶片、模腔及大型齿轮等...     

面向虚拟制造的特种回转面刀具加工仿真系统

建立了面向虚拟制造的特种回转面刀具数控加工仿真系统的体系结构 ,并以砂轮与刀具为例对体系中不同对象间的碰撞干涉进行了讨论 ,推导了相应的检验算法。该体系将几何模型与物理模型相结合 ,较真实地反映了特种回转面刀具数控加工的实际情况 ,提出了新的高效判交算法 ,可有效地提高检验效率     

分区型（错齿）特种回转面刀具的成形原理

本文研究了分区型（又称错齿型）特种回转面刀具，这种反映国际特种刀具研究新方向和前沿的新一代特种刀具的刀丸线布置和成形方法，大大改善了顶部力刃的切削条件。     

分区型复合旋转锉的成型原理与数控加工

研究了分区型旋转锉，这种反映国际特种刀具研究新方向和前沿的新一代特种回转面刀具的刃线布置方法，大大改善了顶部刀刃的切削条件。     

特种回转面刀具齿槽的磨削成形

本文介绍特种回转面刀具齿槽形状的计算方法。按这种方法可直接计算出工件在不同位置的槽形。另一方面,也可在四维联动机床上磨削出该特种回转面刀具,并在不同截面上剖开刀具测出齿形,经试验比较发现,这两种方法得到的工件齿形是吻合的。     

专用自滚切车刀

简述了滚切刀具的基本原理以及与普通刀具加工的本质区别,设计了两种专用自滚切车刀,并说明了其结构特点和设计参数。最后,介绍了专用自滚切车刀的先进性、实用性及加工要点。     

多功能车铣镗复合专用机床结构

介绍了一种多功能车铣镗复合专用机床结构,通过机床布局的结合方式变换,在一次装夹中完成对回转体零件车铣加工和支架零件铣镗加工的效果,做到结合方便、一机多用,实现机械加工的车铣复合、铣镗复合加工的综合功能。     

三轴转台的运动动画模拟

使用三维实体建模软件Solidworks和动画制作专用工具IPA Professional Version 5.0,对三轴转台进行了运动动画模拟.Solidworks与IPA组合后成为机械产品运动仿真的一个强大工具软件,利用它可真实高效地再现设计者意图,便于及时修改和调整设计.     

五轴数控空间刀具半径补偿的实现

深入分析了空间刀具半径补偿矢量的计算方法,对实现该空间刀补矢量到五轴联动数控系统中做了算法的准备和验证,并以UG NX6.0生成的刀位文件(CLSF)为坐标数据来源和五轴联动A/C双转台机床为例,开发了一个专用后置处理软件,并通过在Vericut7.0上模拟和五轴联动机床上实际加工叶片,加工结果说明了该算法的正确性和软件的实用性。     

平面高效滚切磨削精密加工技术

论述平面高效滚切磨削精密加工技术的基本原理；分析滚切刀具与普通刀具的本质区别及适宜高速切削的依据;指明高效滚切磨削加工技术的优越性．     

Post-processor development for a turning and milling composite machine tool

The accomplishment of a turning and five-axis milling in only one setup is extremely useful and is possible on a turning and milling composite machine tool. In this work, we present a control algorithm and develop a post-processor for this machine, which has six linear and three rotary axes. To calculate a generalized kinematics model, coordinate systems are established by analyzing the basic kinematic chain relation of the turning and milling composite machine tool. The two vectors, which control the motions of the cutter contact workpiece, are simultaneously transformed to provide the algorithms of the rotary angles and motion coordinate. A special post-processor written in JAVA language is developed according to the proposed algorithm. To evaluate the effectiveness and accuracy of the developed post-processor, a specimen (blade) is used in the cutting simulation and real machining experiment. Experimental results showed the effectiveness and accuracy of the proposed algorithm. Furthermore, Compatibility is improved by adding new functions such as change of target machine, cutter location data change, workpiece origin offset, and cutting feed rate control.     

Simultaneous geometric error identification of rotary axis and tool setting in an ultra-precision 5-axis machine tool using on-machine measurement

This paper presents a method to identify the position independent geometric errors of rotary axis and tool setting simultaneously using on-machine measurement. Reducing geometric errors of an ultra-precision five-axis machine tool is a key to improve machining accuracy. Five-axis machines are more complicated and less rigid than three axis machine tools, which leads to inevitable geometric errors of the rotary axis. Position deviation in the process of installing a tool on the rotary axis magnifies the machining error. Moreover, an ultra-precision machine tool, which is capable of machining part within sub-micrometer accuracy, is relatively more sensitive to the errors than a conventional machine tool. To improve machining performance, the error components must be identified and compensated. While previous approaches have only measured and identified the geometric errors on the rotary axis without considering errors induced in tool setting, this study identifies the geometric errors of the rotary axis and tool setting. The error components are calculated from a geometric error model. The model presents the error components in a function of tool position and angle of the rotary axis. An approach using on-machine measurement is proposed to measure the tool position in the range of 10 s nm. Simulation is conducted to check the sensitivity of the method to noise. The model is validated through experiments. Uncertainty analysis is also presented to validate the confidence of the error identification.     

Wear of rotary carbide tools in machining of Al/SiCp composites

With the projected widespread application of Metal Matrix Composites, it is necessary to develop an appropriate technology for their efficient and cost-effective machining. This paper deals with the study of feasibility of rotary carbide tools in the intermittent machining of Al/SiCp composites. A rotary tool holder was designed and fabricated for this work. Experiments were designed using Taguchi Methods to analyse the influence of various factors and their interactions on the flank wear of rotary carbide tools during machining. A tool-life model describing the effect of process, tool and material dependent parameter on the magnitude of flank wear of a rotary carbide tool is proposed.     

Modeling of tool wear during hard turning with self-propelled rotary tools

In this paper, an attempt is made to evaluate the self-propelled rotary carbide tool performance during machining hardened steel. Although several models were developed and used to evaluate the tool wear in conventional tools, there were no attempts in open literature for modeling the progress of tool wear when using the self-propelled rotary tools. Flank wear model for self-propelled rotary cutting tools is developed based on the work-tool geometric interaction and the empirical function. A set of cutting tests were carried out on the AISI 4340 steel with hardness of 54–56 HRC under different cutting speeds and feeds. The progress of tool wear was recorded under different interval of time. A genetic algorithm was developed to identify the constants in the proposed model. The comparison of measured and predicted flank wear showed that the developed model is capable of predicting the rate of rotary tool flank wear progression.     

CAPP 开发工具系统的研究与实践

阐述了研制ＣＡＰＰ开发工具系统的必要性和可行性,给出了ＣＡＰＰ开发工具系统的研制原理、原则和策略;介绍了笔者开发的ＨＣ－ＣＡＰＰ开发工具系统结构模型和构造专用ＣＡＰＰ系统的方法