四轴数控重磨球头立铣刀端刃的研究

球头铣刀的修磨研究，对于用钝刀具的再利用有着十分重要的作用，如何有效解决球头立铣刀的修磨问题将变得十分迫切。若能在四轴联动机床上实现对球头立铣刀的重新修磨，不仅可以降低成本、减少刀具浪费，提高加工精度与效率，而且能更好地发挥现有机床的作用。本文就球头立铣刀端刃四轴数控重磨的问题进行研究。     

三轴CNC重磨球头刀端刃的实现研究

球头立铣刀的应用越来越广泛，目前，刀具用户对球头立铣刀用钝后的重新修磨，主要依靠手工进行，其精度无法保证，本文就如何进行快速、准确、高质量地在三轴数控铣床上实现球头立铣刀端刃的重磨方法和夫具设计问题进行讨论。     

基于三轴CNC重磨球头立铣刀端刃的方法研究

球头立铣刀的应用越来越广泛，为了降低成本，节约刀具材料，球头铣刀的修磨研究有着十分重要的作用，若能在三轴联动数控机床上实现对球头立铣刀的重新修磨，不仅可以降低成本、减少刀具浪费，而且能更好地发挥现有机床的作用。本文对利用三轴CNC磨削的球头立铣刀端刃的方法进行研究。     

四轴CNC重磨球头立铣刀端刃加工误差分析之一

在四轴CNC重磨球头立铣刀端刃的过程中，如果磨削余量较大，仍用原程序进行加工会出现磨削不到位的情况，实际端刃与理论端刃存在误差。本文对这种情况产生的误差进行分析为重新修磨球头立铣刀端刃的误差估算提供理论依据。     

立铣刀数控测量修磨原理及其实现

在现代加工制造领域中,刀具的性能严重地影响着被加工产品的质量．而对刀具进行修磨是保证刀具质量及延长刀具寿命的有效方法。本文详细讨论了立铣刀的数控测量修磨原理及其实现方法,     

基于四轴CNC机床的球头立铣刀端刃重磨方案

探讨了在保证正确的端刃曲线和合理的刀具切削参数的前提下 ,在四轴联动数控机床上对球头立铣刀重新修磨的实现方案     

整体硬质合金球头立铣刀的重磨试验研究

以高速加工的整体硬质合金球头立铣刀的重磨试验为例,介绍了为适应不锈钢的高速加工,铣刀结构参数、涂层而进行的调整,并介绍了铣刀的重磨流程。试切表明:重磨刀具的平均寿命接近新刀。     

五轴磨床加工球头立铣刀轨迹建模研究

根据现有的五轴数控磨床刃磨运动的特点,运用几何学与运动学原理,以正交螺旋型刃口曲线为基础,建立了砂轮加工球头立铣刀前刀面、后刀面的刀位轨迹模型,即包括砂轮中心与轴线矢量模型。该研究为实现在现有的磨床上加工或修磨球头立铣刀提供了理论基础,也为其他类似磨床进行刀具加工的研究提供参考。     

自由曲面数控加工用刀具

从刀具有效半径和切削速度的角度,分析比较了球头立铣刀在三坐标和平头立铣刀在五坐标自由曲面加工中的加工效率与切削性能,提出了球头立铣刀和平头立铣刀的优化刀具尺寸,并对叶片曲面的刀具轨迹进行了仿真模拟。     

DAREX刀具刃磨机

刀具在整个加工制造成本中，看似只占很小的比例。但在整个加工效率方面，恰恰是刀具在起举足轻重的作用。随着对加工精度要求的提高，对刀具的要求也更高，相对于刀具的成本也在增加，所以刀具的重新修磨就显得更加重要!以往刀具的修磨只局限于人工在砂轮机上修磨，或是由刀具厂家回收修磨，这些方式就都谈不上效率可言；再者，现在操作数控机床、加工中心的技术工人们，不可能在工作初期，用大量的时间来学修磨刀具。     

烟草切丝机曲刃刀辊体铣削夹具的设计应用

烟草切丝机曲刃刀辊体技术要求较高、加工难度较大,为此结合加工工艺设计出两套铣削夹具,分别用于曲刃刀辊体轮廓面的粗、精铣削加工。铣削夹具主要由定位、锁紧、分度、转位、对刀等机构组成。文中还介绍了工装的联接、使用以及工件铣削加工步骤。该铣削夹具的设计应用对于圆周分布且与旋转轴心线有多个交角的平面组合加工值得借鉴。     

A force-model-based approach to estimating cutter axis offset in ball end milling

Cutter runout due to cutter axis offset is quite common in a milling process, yet it is difficult to directly measure the runout geometry of a ball end cutter during the cutting process. This paper presents an analytical method for the estimation of cutter radial offset via forces in ball end milling. Closed form expression for the total milling force in the presence of cutter offset is first obtained. Fourier series coefficients for the offset related force component are shown to be expressed explicitly in terms of the offset geometry and serve as the basis for the identification of the offset geometry from the measured cutting forces. The offset geometry including its magnitude and the phase angle are directly calculated from the measured force component at the spindle frequency through two algebraic expressions. The identification method is finally validated by milling experiments.     

不同槽型铣刀片铣削过程振动分析

机械加工中工艺系统的振动破坏了零件的加工精度。刀具与工件之间的冲击力是引起振动的主要原因之一。通过对带有三维复杂槽型的波形刃铣刀片与平前刀面铣刀片铣削力和铣削振动的对比试验、铣削力的有限元数值模拟,表明带有三维复杂槽型的波形刃铣刀片铣削力小,铣削过程中引起工艺系统的振动较平稳。可以断言,优化刀具的结构与几何参数可有效地减小铣削过程的振动现象。     

确定铣削力模型中刀具偏心参数的一种算法

对数控加工中球头铣刀铣削力建模时刀具偏心参数的确定进行了研究。在铣削力模型的建立中考虑了刀具偏心的影响,推导出刀具偏心参数的表达式,考虑到刀具单刃切削条件,提出了刀具偏心参数的确定算法。在通过铣削力试验数据计算铣削力系数的过程中,采用上述算法确定了刀具的偏心参数,用于铣削力的仿真预测中,仿真结果和铣削力试验的结果表明,算法效果良好。     

A numerical study of the effects of cutter runout on milling process geometry based on true tooth trajectory

Cutter runout is a common phenomenon affecting the cutting performances in milling operations. To date, most of the milling process models considering cutter runout were established based on the circular tooth path approximation, which brought errors into the runout estimation. In this paper, a new approach is presented for modelling the milling process geometry with cutter runout based on the true tooth trajectory of cutter in milling. The mathematical relationship between the trajectories generated by successive cutter teeth with runout is analysed. The milling process geometrical parameters, including the instantaneous undeformed chip thickness, the entry and exit angles of a cutting tooth, and the ideal peripheral machined workpiece surface roughness, are modelled according to the true tooth trajectories. Numerical method is used to solve the derived transcendental equations. A simulation study of the effects of cutter runout on milling process geometry is conducted using the models. It was found that the change of cutter radius for a tooth relative to its preceding one is the most important factor in evaluating the effects of cutter runout.     

基于$TC_DP铣削斜面及倒圆角的程序编制方法

轮廓周边倒圆角、铣削斜面一般使用球头刀或者平底立铣刀,并编制宏程序完成铣削加工。将SIEMENS系统的T铣削;倒圆;倒角;编程;$TC_DP;R参数轮廓周边倒圆角、铣削斜面一般使用球头刀或者平底立铣刀,并编制宏程序完成铣削加工。将SIEMENS系统的T$_DP功能和R参数有机地结合起来,分析其程序的编制方法,推导得出了刀具半径补偿值的计算公式,编制了通用的加工宏程序。     

SB25125凸轮轴高速外铣

SB25125凸轮轴高速外铣是以刀盘的高速旋转为切削的主运动,凸轮轴慢速旋转一周完成一个轴径或连杆径的加工过程以及完成辐板的外径和侧面的加工的高效数控铣床。     

Analysis of cutting force coefficients in high-speed ball end milling at varying rotational speeds

In high-speed ball end milling, cutting forces influence machinability, dimensional accuracy, tool failure, tool deflection, machine tool chatter, vibration, etc. Thus, an accurate prediction of cutting forces before actual machining is essential for a good insight into the process to produce good quality machined parts. In this article, an attempt has been made to determine specific cutting force coefficients in ball end milling based on a linear mechanistic model at a higher range of rotational speeds. The force coefficients have been determined based on average cutting force. Cutting force in one revolution of the cutter was recorded to avoid the cutter run-out condition (radial). Milling experiments have been conducted on aluminum alloy of grade Al2014-T6 at different spindle speeds and feeds. Thus, the dependence of specific cutting force coefficients on cutting speeds has been studied and analyzed. It is found that specific cutting force coefficients change with change in rotational speed while keeping other cutting parameters unchanged. Hence, simulated cutting forces at higher range of rotational speed might have considerable errors if specific cutting force coefficients evaluated at lower rotational speed are used. The specific cutting force coefficients obtained analytically have been validated through experiments.     

基于Pro/E轴类零件数控车铣加工二次开发的研究

由于Pro/ENC程序设计环节操作复杂,主要研究了利用Access建立刀具数据库和加工参数数据库,在Pro/ENC模块下对轴类零件车铣加工。对轴类零件进行工艺分析,利用Pro/ENC模块车铣加工时调用刀具数据库和加工参数数据库,可以模拟刀具加工过程及NC检测;通过后置处理生成后置处理程序,实现轴类零件数控车铣加工自动编程。     

数控铣削加工对刀原理及对刀技巧探析

在数控铣削加工中,对刀是一项主要操作和基本技能,对刀精度的高低及效率直接影响零件的加工精度及效率。本文阐述了对刀的目的及原理,并介绍了采用基准工具对刀的方法及技巧。