NX虚拟机床仿真在车铣复合机床中的应用

目前针对高端数控机床虚拟仿真加工技术的需求越来越高,传统的CAM软件的加工仿真模块大多基于刀具路径仿真,无法验证后处理生成的G代码的正确性。而车铣复合机床由于结构复杂,只验证刀路轨迹的正确性往往是不够的。NX的CSE虚拟机床仿真技术可以像真正的数控机床操作系统一样编译读取G代码仿真,包含真实机床、刀具和夹具,可以预测加工过程中是否有干涉或者碰撞等情况发生,使仿真更真实、直观,更接近实际加工情况。本文以津上M06SD双主轴车铣复合数控机床为例,应用NX软件的CSE功能对车铣复合加工的整个操作流程进行了虚拟仿真加工环境的开发,为虚拟机床仿真技术提供了新方法。

虚拟机床仿真定制和应用

介绍了虚拟仿真后处理定制、机床模型处理、机床运动模型创建、仿真驱动定制、特殊专用指令的定义、角度头仿真指令的定义、虚拟机床仿真配置、虚拟机床仿真验证和虚拟机床仿真报告创建。通过虚拟机床仿真定制,实现了NC加工程序上机床提前仿真验证的目标,防止NC程序在实际机床上试运行存在的干涉碰撞风险,提高生产效率,准确评估工时。

基于VERICUT的5轴数控铣床虚拟仿真系统设计

5轴联动切削运动要比普通3轴数控铣床复杂,它释放了刀具相对工件的转动自由度,且更容易遇到刀具干涉问题的。为减少零部件试切,检验数控工艺合理性,因此,复杂零件5轴联动铣削加工前,有必要对其加工过程进行虚拟仿真。为此,本项目首先对5轴数控转动自由度原理进行了详细分析,并基于VERICUT设计一台虚拟仿真5轴数控铣床。然后以一个典型空间曲面零件作为虚拟仿真加工任务,来验证5轴联动数控加工工艺的合理性和正确性。

五自由度并联机床虚拟样机建模与仿真

为了验证五自由度完全并联机床的设计方案和理论模型,将虚拟样机技术应用于该并联机床的设计开发过程。利用三维机械CAD软件Solid Works建立该并联机床的虚拟样机模型,应用OLE接口技术实现了该并联机床的数控加工仿真、刀具轨迹显示验证和仿真过程中自动换刀与毛坯的自动设计,采用多体动力学仿真软件ADAMS实现了该并联机床的动力学分析和仿真。计算机仿真结果证实了理论模型的正确性,验证了设计的合理性和可靠性。

Kinematics simulation and application for machine tool based on multi-body system theory

Based on the multi-body kinematics principle, the topological structure and restriction relation among parts of machine tool and 3D multi-body model are constructed, the kinematics simulation system of machine tool is developed. The designer can observe the movement and machining course of the whole machine tool and understand accurately the kinematics parameters of components such as position, velocity and acceleration. Also the designer can estimate the pose of components in the virtual circumstance and forecast accurately and correct problems which may appear during the design before the prototype is manufactured to assure the feasibility of design scheme, shorten period of product design and reduce product cost. The simulation system is used during the design of CK1416 high speed and precision numerical control lathe. The curves of ball screw angular velocity and carriage displacement agree well with the results of theoretical calculation and the constructed model is correct.