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...     

特种回转铣刀球头部分的加工方案

讨论了带球头的特种回转铣刀的制造难点 ,提出了解决该加工难点的非数控加工法、新定义方和三轴联动加工方案及其对应的数学模型 ,为研究和加工球头回转铣刀提供了参考     

二轴联动数控加工球头铣刀的虚拟制造模型

分析了三种不同定义的螺旋刃口曲线的异同和与优劣 ,给出了二轴联动数控加工时不同截形的螺旋沟槽球头铣刀的刃口、沟槽及砂轮截形、相对进给速度等设计模型 ,并通过实得沟槽及计算机模拟结果进行了验证 ,认为借助该模型可获得较理想的球头回转铣刀。     

面向特征造型技木的特种回转面刀具CAPP软件设计

以Windows2000为操作平台，基于特征造型技术描述了特种回转面刀具特征信息的输入方法，采用VB6．0、VC 6．0及ARX开发工具开发了实用化的特种回转面刀具CAPP软件系统，介绍了该系统中CAD／CAPP的集成技术和各类数据库的接口，并给出了该系统的运行实例。     

端面铣刀切削刃自动交换装置

<正> 图示为用于数控机床的端面铣刀切削刃自动更换装置的结构,其特点是铣刀可以在回转中更换切削刃。如图所示,在刀体上装有配着四个刀片的组合刀体(其中三个是备用齿),在铣刀外侧装一个驱动装置。当刀齿用钝,需要更换切削刃时,便对驱动装置发出指令信号,驱动装置在铣刀继续回转的情况下顶住锥销杠杆,使固定组合刀体的锥销脱开,同时,驱动杆使组合刀体回转,瞬间便可完成切削刃更换工作。     

加工渐开线螺旋齿轮的指状铣刀齿形计算

一、概述在机器制造业中,大模数的螺旋齿轮或蜗杆,常用指状铣刀逐齿进行铣制。工件齿侧螺旋面是铣刀一面绕自身轴线旋转(形成切削运动),一面相对于工件轴线作螺旋运动时,刀刃回转曲面所形成的包络。换句话说,铣刀回转曲面与加工完毕的工件螺旋齿面是相互包络的。如果把一把指状铣刀,放置于用此刀加工完毕的工件齿槽中,就可以发现铣刀与工件螺旋齿面沿着一条空间曲线相接触(见图1)。     

快速精确成形 五轴加工中心进行整体加工

主轴向前倾斜的五轴加工中心,由于回转点位于铣刀头上,因而在回转运动时就不存在与机座碰撞的危险。     

抛物回转面的精密模具制造模型研究

抛物回转面因具备特殊的光学性质而被广泛使用，针对批量生产该表面的精密模具的数控加工问题．给出了用平头铣刀三轴联动加工方案，并给出了工具参数，加工行距以及加工数控进给量的整套计算模型，用实例验证了方案的可行性和模型的可靠性，为此类精密镜面批量生产的模具制造提供了全面参考。     

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。     

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…     

铣刀线切割加工分度控制卡误差补偿分析

本文介绍了金刚石铣刀线切割加工用数控分度回转台的控制卡的软硬件构成,重点分析了控制卡内部单片机控制程序设计时脉冲补偿方法的应用。该方法的应用明显提高了回转台的分度精度。     

基于LabVIEW的双铣刀数控机床控制系统

为解决单铣刀螺杆铣床在加工塑料行业挤出机螺杆时存在效率低的问题,将采用工业计算机和运动控制卡设计开发开放式数控系统的技术应用于研制高效的双铣刀数控螺杆铣床中.开展了螺杆外形和现有螺杆加工过程的分析,建立了机床在螺杆加工时各个轴之间的关系,提出了采用虚拟仪器软件LabVIEW及其motion模块和NI公司的PCI-7390运动控制卡,设计双铣刀同时加工的专用铣床及其控制系统的方法;在理论上对双铣刀数控机床的可行性和加工效率进行了评价,并进行了两把铣刀同时加工螺杆的实验.研究结果表明,所研制的双铣刀数控机床不仅实现了两把铣刀的同时加工,使加工效率提高了10％以上,加工系统还具有工作界面简单、易懂,容易上岗操作的优点.     

Models for evaluating the revolving cutter profile of circular-arc end mills

This paper presents models for defining the minimum circumscribed cylinder (MCC) of the cutter shank, the minimum circumscribed circular-arc-type revolving surface (MCCRS) and the minimum circumscribed corner arc revolving surface (MCCARS) with a spiral groove. A systematic modeling procedure is presented for the assessment of the contour quality of the circular-arc end milling (CAEM) cutters with a cylindrical shank. The axis of the MCC of the cylindrical shank of a revolving cutter with a circular-arc generator curve and a corner radius is taken as the datum line. The profile tolerances and errors are estimated. The presented models are all illustrated and verified by example. This approach can be generalized to a cutter with more than two circular arcs in its shape profile. The paper provides a valuable reference for the evaluation of the actual contour quality of this type of revolving cutter.     

铲齿齿背曲线的自动生成方法

在VisualLisp二次开发环境中 ,利用VisualLisp的图形处理函数 ,针对铣刀、滚刀等典型复杂刀具工作图中端面齿形的绘制特点 ,提出了一套简单实用的弧线求交和弧弧求交特殊算法 ,实现了铣刀、滚刀等端面齿形图中铲磨齿背曲线的自动生成。     

回转刀具新型刃口设计及虚拟制造的主干通用模型

针对回转刀具传统刃口设计方法在二轴联动数控加工中遇到的问题 ,提出了回转刀具新型刃口设计方法 ,推导了相应的设计和虚拟制造主干通用模型 ,并给出了典型应用实例     

Design and NC Machining of Concave-Arc Ball-End Milling Cutters

The paper presents a geometric modelling approach for the precision design and NC machining of a concave-arc ball-end milling (CABEM) cutter which is an important tool for mould-making industries. This paper presents systematic models of the cutting edge, helical groove, and grinding wheel design for the NC machining of a CABEM cutter. Both the normal to the revolving axis and the tangent to the groove, are used to derive the required precision sectional profiles of the grinding wheel. In compliance with the maximal sectional radius of the cutter, the profile of the groove section and both the radial and axial cutting speeds of the grinding wheel are computed in sequence. Using the computer simulation results of the groove actually obtained, this paper proposes a method to resolve the problems of the residual revolving surface and the narrow cutting edge strip. This paper is intended to serve as a reference for the design and NC machining of cutters of this type .     

加工铁道锰叉、道岔专用可转位铣刀的CAD/CAM

介绍了加工铁道锰叉、道岔专用可转位铣刀的ＣＡＤ／ＣＡＭ方法及铣刀结构特点。     

圆柱铣刀前角的精确磨削

提出了圆柱形螺旋刃铣刀磨削偏距Ｅ的精确计算方法，该法可以保证精确地磨出所要求的法向前角。介绍了用图形模拟技术校核前刀面磨削干涉的方法。     

模块式可转位减振端铣刀 CAD

在综合分析端面铣削动态过程的基础上,运用不等齿距端铣刀的减振理论、优化设计及ＣＡＤ技术,开发了模块式可转位减振端铣刀ＣＡＤ软件。该软件适用于直径８０～５００ｍｍ共９个系列的减振端铣刀的计算机辅助设计,可实现不等齿距端铣刀齿间角优化设计和铣刀图绘制的一体化,提高了设计精度和效率。     

Prediction of dynamic cutting force and regenerative chatter stability in inserted cutters milling

Currently, the modeling of cutting process mainly focuses on two aspects: one is the setup of the universal cutting force model that can be adapted to a broader cutting condition; the other is the setup of the exact cutting force model that can accurately reflect a true cutting process. However, there is little research on the prediction of chatter stablity in milling. Based on the generalized mathematical model of inserted cutters introduced by ENGIN, an improved geometrical, mechanical and dynamic model for the vast variety of inserted cutters widely used in engineering applications is presented, in which the average directional cutting force coefficients are obtained by means of a numerical approach, thus leading to an analytical determination of stability lobes diagram (SLD) on the axial depth of cut. A new kind of SLD on the radial depth of cut is also created to satisfy the special requirement of inserted cutter milling. The corresponding algorithms used for predicting cutting forces, vibrations, dimensional surface finish and stability lobes in inserted cutter milling under different cutting conditions are put forward. Thereafter, a dynamic simulation module of inserted cutter milling is implemented by using hybrid program of Matlab with Visual Basic. Verification tests are conducted on a vertical machine center for Aluminum alloy LC4 by using two different types of inserted cutters, and the effectiveness of the model and the algorithm is verified by the good agreement of simulation result with that of cutting tests under different cutting conditions. The proposed model can predict the cutting process accurately under a variety of cutting conditions, and a high efficient and chatter-free milling operation can be achieved by a cutting condition optimization in industry applications.