基于加工模板的快速编程

使用加工模板编程,可以实现基于知识的加工,在保证数控程序质量的前提下提高编程效率。在建立编程知识库后,创建编程模板,应用模板可以快速完成程序编制。以Cimatron E软件为例介绍了加工模板的创建与应用,并以一典型模具型芯零件编程为例进行说明。     

基于UG软件的齿轮指型铣刀参数化设计与编程应用

采用UG软件对指形铣刀进行参数化设计与数控加工编程,并建立模板文件;利用VB语言编写自动打开UG模板文件的应用程序;详细地介绍了使用过程,并通过实际加工验证了程序的正确性。     

基于知识的车灯模具编程模板的开发及应用

分析了车灯注塑模具的工艺结构特征分类及其加工工艺,基于Cimatron E软件环境开发了车灯模具各种结构的高速铣削数控加工工艺及模板,以提高NC编程质量和效率,规范模具加工的工艺路线与工艺参数。实际应用证明了该编程模板具有可行性和实用性。     

利用CAXA制造工程师的知识加工模板提高编程加工效率

为提高编程及加工效率,充分利用CAXA制造工程师软件的"知识加工"模板功能,将合理的加工方式、下刀方式、切削用量等要素以"知识加工"模板方式保存,在后续类似零件的编程中可充分利用以快速高效地完成程序的编制,并给出了实例应用。     

汽车覆盖件模具数控加工工艺模板开发及应用

研究了汽车覆盖件模具的工艺结构特征、分类及其加工工艺,基于PowerMILL软件环境开发了汽车覆盖件模具各种结构特征的数控加工工艺及模板,以提高NC编程的质量和效率,规范汽车覆盖件模具加工工艺路线、工艺参数等。实际应用证明了该工艺模板具有可行性和实用性。     

基于PowerMILL的汽车覆盖件模具数控加工工艺模板开发

研究了汽车覆盖件模具加工工艺模板的设计,基于PowerMILL软件以VB.NET为开发平台,利用宏命令对PowerMILL进行二次开发,建立了汽车覆盖件模具的数控加工工艺模板。应用该方法能够有效地减少操作失误,提高生产效率,而且模板的灵活性高,具有较高的实用价值。     

PEMFC金属双极板流道模板电解加工的有限元模拟与分析

双极板是质子交换膜燃料电池中的核心部件,金属材料双极板成为未来双极板的主要发展方向。提出采用模板电解法加工金属双极板上的微流道结构。建立模板电解加工双极板流道过程中阴阳极间隙的数学模型,利用有限元软件对模板电解加工微流道的成形过程进行模拟。根据模拟结果分析不同电解参数下阳极表面电流密度的分布情况,为电解加工的实际应用提供了理论依据。     

模板电解金属双极板表面流道的试验研究

随着燃料电池微型化的发展趋势,金属材料制成的双极板成为未来双极板发展的主要方向。以加工双极板表面多通道蛇形流道为例,提出采用模板电解加工金属双极板上的微流道结构。建立模板电解加工间隙内电场的数学理论模型,并利用有限元软件对模板电解加工微流道的成形过程进行模拟,研究加载电压对模板电解加工过程中阴阳极表面电场分布的影响。搭建模板电解试验平台,通过试验研究直流和脉冲加载电压对流道形貌和定域性的影响。模拟与试验结果表明,采用脉冲小电压可减小流道的杂散腐蚀,提高模板电解加工的定域性。     

NX中加工设置装配创建技术的研究

NX软件的加工设置装配结构将加工部件与工艺资源相关联,构成了完整的加工环境,可直接进行集成仿真验证(ISV)。阐述在NX原生环境下加工设置装配的创建方法,研究加工设置模板的创建以及调用技术;并深入探索Teamcenter软件与NX集成环境下加工设置的创建技术。加工设置装配创建技术是Teamcenter中创建零件制造工艺的关键技术,利于实现产品的全生命周期管理。     

基于Cimatron E7.0的模具高速加工编程模板设计

论述了高速加工技术应用于模具制造的优点及当前存在的问题。总结了高速加工对刀具路径要求。以飞轮壳凹模高速数控加工程序编制为例,详细介绍了利用Cimatron E7.0软件编制模具高速加工程序的方法。提出了利用设计模具编程模板解决当前某些问题的方法。编程模板在模具数控加工中的应用,实现了CAPP与CAM编程的一体化操作和信息的有效集成,帮助工艺人员快速、精密地完成零件的加工制造,并且不仅使加工效率大大提高,还使模具表面质量更佳,使用寿命更长。     

Highly efficient manufacture of groove with sharp corner on adjoining surfaces by 6-axis control ultrasonic vibration cutting

Rapid machining means the extreme reduction of the machining lead-time required in completing a product from the blank shape. One of the ways in which machining lead-time could be reduced drastically is by avoiding too many setup changes. This paper presents a new machining method to create a groove with sharp corner on adjoining surfaces in one setup. Grooves with sharp corner (GSC) on adjoined curved or overhanging surfaces are at present impossible to manufacture by conventional machining in one setup or even by the existing numerical control (NC) machining method especially if it is adjacent to the obstruction. The obstruction tends to hamper the flow of machining operation, thereby requiring two or more setups as well as additional expensive fixtures to machine such a product.

In the study, the GSC on adjoined curved or overhanging surfaces will be manufactured by 6-axis control milling using a non-rotational tool with the application of ultrasonic vibrations (USV) in one setup. The study also describes the machining method as well as the development of software for 6-axis control milling and the effect of ultrasonic vibrations in multi-axis machining. Based on the experimental results, the effectiveness of the new manufacturing method as well as the developed CAM software has been experimentally confirmed in the study.     

光学自由曲面的超精密加工技术及应用

光学自由曲面是指非对称性、不规则、不适合用统一的光学方程式来描述的光学曲面.自由曲面光学元件在光电产品及光通讯产品中的应用日益广泛.采用多轴超精密金刚石机床加工光学自由曲面,可达到亚微米级形状精度和纳米级表面粗糙的高精度水平.文章介绍了光学自由曲面的超精密加工技术及其在光电产品领域的应用,并开发适合几种典型光学自由曲面超精密加工的刀具轨迹自动生成软件.     

并联机床加工中心数控系统的研究

分析了并联机床加工中心数控系统的设计。此数控系统以Kollmorgen运动控制卡为运动控制核心，包括多个软件控制模块，实现复杂曲面零件的定位和加工。此外，该系统设计了刀库和工艺管理功能，保证了机床加工过程的自动化。     

支撑粱两端勾头的数控优化加工

随着数控加工技术的日益普及和不断发展,CAD/CAM软件的不断更新,加工各类曲面或复杂形面一直是多轴数控机床在编程及应用中的一项的关键技术。UG作为一款高端的CAD/CAM软件,在实际加工中有着广泛的应用。通过UGNX4.0的自动编程方式,在TK42200数控龙门铣镗床上加工"支撑梁"两端勾头的加工方案,该方案对其它复合形面的加工也有借鉴意义。     

Five-axis STEP-NC controller for machining of surfaces

Five-axis machining is more widely used in manufacturing of freeform surfaces. However, in five-axis machining of freeform surfaces, incomplete information exchange between computer numerical control (CNC) and computer-aided design/computer-aided manufacturing (CAM) results in many limitations need to be rectified. In the paper, a new structure of CNC based on STEP-NC standard is proposed, where tool path planning, tool offset, and inverse kinematics are transferred from CAM to CNC. In order to guarantee good openness, open platform and standard interface are applied in the development. Technology of module collaboration and design of data flow are studied. A five-axis real-time interpolator for non-uniform rational B-spline surfaces machining is realized. Based on these technologies, a five-axis CNC is developed in the manner of software realization, which consists of interpreter, task coordinator, axis group, softPLC, etc. The software CNC system has been applied on a tilt-rotary type five-axis machine tool, where the milling experiment has been performed successfully.     

基于UG的叶轮5轴数控铣削编程与加工

叶轮零件结构复杂,其数控加工技术普遍存在编程复杂,困难且效率低下等问题.介绍使用典型的CAD/CAM软件UG7新增的叶轮加工模块,对深窄槽道、大扭角的滑轮发动机叶轮的五坐标加工程序刀路进行编制,大大提高了叶轮加工编程的速度和效率,为叶轮零件的编程加工提供了新思路和方法.     

Study of applying reverse engineering to turbine blade manufacture

A turbine blade has complex shaped free-form surfaces that can be modelled as surfaces with variable curvature by high-degree polynomials. Industry typically utilizes a turnkey system and special-purpose machine tool to manufacture turbine blades. A turkey system is a closed form design. Users need only input relevant data to this system to manufacture the product directly. However, users are unaware of the internal operation of the system. With rapidly advances in computing technology, commercial CAD/CAM systems can be utilized to design freeform surfaces and generate a tool path for the designed surfaces. This study uses a reverse engineering technology that is used to reconstruct the CAD model for a turbine blade. The prototype is measured by a coordinate measuring machine to obtain the geometrical control data points that are used to generate the CAD model in the UniGraphics (UG) CAD/CAM system. The UG/GRIP (GRaphics interactive Programming) language is used to generate the cutter location data rather than using the default UG CAM module. A five-axis NC code is acquired by the developed postprocessor and verified by the solid cutting simulation software VERICUT®. Real turbine blade machining is performed on a table/spindle tilting five-axis machine tool, demonstrating the effectiveness of the proposed approach.     

基于复杂零件五轴加工系统的可重构机器人建模与试验

将数控机床的通用编程语言G代码应用于加工轻质材料、低公差自由曲面复杂零件的可重构机器人多轴加工系统,并将复杂曲面加工的五轴立式关节机器人视为倾斜五轴（X,Y,Z,A,B）立式铣床的特殊配置,开发出了机器人的控制系统原型。阐述了机器人的建模方法,包括运动学问题的正向解和逆向解的求解方法;分析了机器人三轴、五轴加工时的工作空间;通过三个轻质材料试件的加工试验,验证了实验机器人加工控制系统原型的编程、控制和加工能力。     

复杂曲面零件在线检测与误差补偿方法

复杂曲面零件的高精度加工与精密检测一直是数字化制造领域的研究热点。为提高复杂曲面零件的加工精度、检测精度,提出一种集数控机床在线检测、加工误差分解与补偿加工为一体的集成化方法。介绍集成化在线检测方法及补偿系统的基本原理,分析数控加工后曲面零件测点数据的误差组成,提出一种基于空间统计分析的加工误差分解方法,在建立基于B样条曲面的确定性曲面回归模型的基础上,对回归模型残差进行空间独立性分析,分解出系统误差和随机误差,进而通过数控代码的修改,实现零件加工过程的系统误差补偿。列举一个曲面零件的加工与检测实例,进行方法有效性验证。通过加工工件的在线检测、误差分解、代码修改及补偿加工等环节,实例零件的加工精度有了大幅提高,而该系统的检测精度也通过与三坐标测量机(Coordinate measuring machine, CMM)检验结果的对比,得到了有效验证。     

Milling complex surfaces on a numerically controlled machine tool

A milling method for complex surfaces is proposed. In this method, surfaces of different form are machined by means of a single tool trajectory, defined by a single equation. The theoretical principles of the method are given, with examples of its use. This method expands the scope for machining complex surfaces on numerically controlled machine tools.