影响高速铣削加工质量的因素及PowerMILL高速铣削加工策略

研究影响高速铣削加工的因素,提出PowerMIL的高速铣削加工策略。并通过一个具体实例说明好的加工策略能大大提高加工效率,同时保证加工质量。     

基于PowerMILL的高速铣削加工技术

介绍了PowerMILL的高速铣削加工策略,并通过实例,较为详细地讲述了运用PowerMILL进行数控加工的过程。     

高速铣削工艺浅析

从高速铣削的特点和要求出发,讨论了高速铣削加工方法和刀具的选择方法,对高速铣削进行了铣刀受力分析,介绍了如何确定高速切削刀具参数,最后列举了几个高速加工实例的工艺参数。     

高速铣削加工在压铸模制造中的应用

简要地介绍了高速铣削加工在压铸模制造中的应用,论述了压铸模高速铣削加工的工艺特点.并对压铸模高速铣削加工与传统加工进行了比较.     

发动机箱盖压铸模高速铣削加工编程研究

从优化高速加工工艺过程的角度出发,阐述了采用Cimatron进行模具高速加工编程的策略,主要包括合适的高速加工方法的选择、刀具切入切出、移刀方式的控制等,以发动机箱盖凹模型腔作为加工对象,制定加工策略和切削参数,完成高速加工编程。实践表明应用该软件进行编程满足高速加工要求,克服传统加工方法的缺点,节省设计制造周期,增强了产品生产品质和效率。     

高速铣削工艺在模具加工中的应用

高速铣削加工技术的应用,引起了模具加工业革命性的变化。本文总结了实际模具生产制造中应用高速加工技术的一点经验策略—临界区域预加工策略,该策略能够有效保证高速铣削技术的合理应用,使得模具型腔的加工过程更具有科学性。     

基于变形控制的薄壁电极高速铣削加工工艺研究

在高速机床上试验加工一个薄壁铜电极,从工件装夹、切削参数选用、工序安排、走刀路线等方面展开研究,控制产品变形量达到最小.     

模具高速铣削加工技术及其数控编程实例应用

介绍了模具数控高速铣削相关的机床、高速刀具、CAM数控编程的关键技术应用，并以实例的形式说明了模具数控高速切铣削加工的优点。     

高速铣削与电火花加工在轮胎模具制造中的应用

针对子午线轮胎模具的花纹特点,分析了高速铣削和电火花加工工艺的特点及其在轮胎模具制造中的优势和局限性,指出了选择轮胎模具加工工艺的基本原则,并针对不同类型的轮胎模具给出了具体的加工工艺选择方案,可为轮胎模制造企业在制定轮胎模具加工工艺时提供参考。     

手机壳塑料模具紫铜电极高速铣削加工

对手机壳塑料模具紫铜电极的结构和功能进行了研究,分析了电极高速加工的工作过程、工艺路线、装夹方式、刀具选用和切削用量,介绍了紫铜电极高速加工编程的具体步骤,重点阐述了如何选取高速加工工艺参数。实践结果表明,整个加工过程清晰、刀具和切削参数选用合理。     

Surface finish visualisation in high speed, ball nose milling applications

High speed milling systems are capable of producing complex parts that require little or no hand finishing operations. The machined surfaces are smooth to the touch and they are within the required machining tolerances. However, the visual surface appearance of the parts can be a quality issue because the surface patina is generated by a rotating, multi-flute, ball nose milling cutter as it moves over the surface of the part. Current CAM systems provide good simulating procedures to view the overall surface geometry with swept volume procedures, but they do not consider the micro pattern pertaining to the cutting action of individual cutter flutes. The work presented in this paper addresses this consideration and assesses two new methods to satisfy the need to account for, and predict, the surface machining effects from a ball nose milling cutter.     

基于NX6.0高速加工方式的应用

高速加工能够缩短零件的生产工艺过程,增加材料的切除率,提高零件表面的加工精度。在NX6.0 CAM模块支持高速切削技术,当设定合适的加工策略,就能够得到光滑、平顺、稳定的刀位轨迹。本文以实例详细地讲述NX CAM在高速加工中的应用策略。     

数控电火花高速高精度加工

分析了数控电火花加工特点,介绍了LYNUC数控系统HiPT高速高精度核心控制模块的切削特点。通过实际切削加工案例的分析,证实了在辅助电火花放电加工的切削工序中,HiPT高速高精度模块可以获得高品质的切削电极和放电加工工件,且有效地提高数控电火花加工表面精度和加工效率,降低了生产成本。     

Investigation of surface integrity in high speed end milling of a low alloyed steel

Understanding the effects of cutting speed, feed rate and cutting depth on surface integrity is very important for the control of workpiece quality. This paper presents a global experimental study of surface integrity in the case of high speed end milling. In the global term, we include measurements of residual stresses, surface roughness and cutting forces. Our observations and conclusions are mainly concentrated on the effect of depth of cut with a set of constant parameters, such as cutting speed, feed rate, and tool/material couple. This set of constants has been determined using the theory of stability lobes. All experiments have been performed with an electro-spindle equipped with magnetic bearings. The results lead to a good understanding of the influence of cutting conditions on surface integrity in high speed milling of a low alloyed steel. The discussion examines a specific point where the residual stress and residual stress gradient are lowest and also the origin of the residual stress value.     

Surface shape prediction in high speed milling

Chatter is one of the main causes affecting the surface quality of machined parts. Since it occurs when a machining process is unstable, it is important to select process parameters that promote stability. However, this condition alone is not sufficient to ensure good surface shape because the dynamics of the machining system as a whole also affects the resulting surface. Thus, even in the absence of chatter, significant movement of the tool or the part may occur causing surface defects. This effect is significant in high speed milling. In order to select optimal machining parameters, a computationally efficient simulator has been developed based on a novel machined surface generation model capable of accurate and reliable prediction of the surface shape. The programme written in MATLAB^® predicts the surface shape from which surface finish, waviness, form and position parameters can be determined. A test bench consisting of a relatively low frequency second order dynamic mode is used to hold a test sample. The results obtained on a machining centre show that the predictions favourably compare with experimental results.     

淬火钢平面铣削工艺应用

介绍了对淬火钢平面铣削代替磨削的加工工艺。     

High Speed 3D Milling by Dry EDM

This paper describes the high speed EDM milling of 3D cavities using gas as the working fluid. In this new process, the molten workpiece material is removed and flushed out of the working gap with the help of high-pressure gas flow. The advantages or this technique are the remarkably small tool electrode wear and the significantly high material removal rate especially when oxygen gas is used due to the extremely strong oxidation of steel workpieces. Experiments showed that the material removal rate increases dramatically when the discharge power density on the wonting surface exceeds a certain threshold due to thermally activated chemical reaction between the gas and workpiece material. The maximum removal rate obtained was almost equal to that of high speed milling of quenched steel by a milling machine. The machining accuracy was considerably better when the gas was sucked through the pipe electrode than Jetted.     

Optimal spindle speed determination for vibration reduction during ball-end milling of flexible details

In the paper a method of optimal spindle speed determination for vibration reduction during ball-end milling of flexible details is proposed. In order to reduce vibration level, an original procedure of the spindle speed optimisation, based on the Liao–Young criterion [1], is suggested. As the result, an optimal, constant spindle speed value is determined. For this purpose, non-stationary computational model of machining process is defined. As a result of modelling, a hybrid system is described. This model consists of following subsystems, i.e. stationary model of one-side-supported flexible workpiece (modal subsystem), non-stationary discrete model of ball-end mill (structural subsystem) and conventional contact point between tool and workpiece (connective subsystem). The method requires identification of some natural frequencies of stationary modal subsystem. To determine them, appropriate modal experiments have to be performed on the machine tool, just before machining. Examples of vibration surveillance during cutting process on two high speed milling machines Mikron VCP 600 and Alcera Gambin 120CR are illustrated.     

精锻模具高速加工工艺及UG的数控编程

分析了先进的高速铣削技术在模具加工中的应用优势,针对精锻模具的加工难点和传统加工中存在的问题以及批量生产的需求,提出了精锻模的高速铣削工艺的特点、高速铣削数控编程的原则和方法.