In order to design and manufacture spatial cams rapidly and precisely,a CAD/CAM system is introduced for the design of 3D modeling and automatic programming in NC machining. Based on Pro/ENGINEER software used widely ...In order to design and manufacture spatial cams rapidly and precisely,a CAD/CAM system is introduced for the design of 3D modeling and automatic programming in NC machining. Based on Pro/ENGINEER software used widely in CAD/CAM systems,according to the curve equation of spatial cam follower’s motion specification,the follower displacement curve is drawn quickly and accurately,then the 3D modeling of spatial cam is created using Pro/Feature module in accordance with this curve,afterwards,the quality of contour surface of spatial cam is inspected by the use of surface analysis,the result of which is fed back to the modeling design of spatial cam; after analyzing the machined theory of spatial cam,the NC machining code for it is programmed automatically according to this theory and the modeling completed in the Pro/Manufacture module. To design and manufacture spatial cams by this process can be modified circularly on the basis of the surface checking information in terms of feedback data,so the contour surfaces created have high precision,excellent kinematic characteristics and dynamic characteristics.展开更多
文摘In order to design and manufacture spatial cams rapidly and precisely,a CAD/CAM system is introduced for the design of 3D modeling and automatic programming in NC machining. Based on Pro/ENGINEER software used widely in CAD/CAM systems,according to the curve equation of spatial cam follower’s motion specification,the follower displacement curve is drawn quickly and accurately,then the 3D modeling of spatial cam is created using Pro/Feature module in accordance with this curve,afterwards,the quality of contour surface of spatial cam is inspected by the use of surface analysis,the result of which is fed back to the modeling design of spatial cam; after analyzing the machined theory of spatial cam,the NC machining code for it is programmed automatically according to this theory and the modeling completed in the Pro/Manufacture module. To design and manufacture spatial cams by this process can be modified circularly on the basis of the surface checking information in terms of feedback data,so the contour surfaces created have high precision,excellent kinematic characteristics and dynamic characteristics.
文摘以直动平底从动件盘形凸轮机构为例,根据选定的从动件运动规律,建立凸轮轮廓曲线的参数方程。在Lab VIEW软件环境中编写计算程序,输入相应的凸轮运动参数,运行程序并将计算凸轮轮廓曲线的结果显示在程序界面上,同时生成曲线坐标点的数据文件。将数据点坐标导入至Solid Works环境中,建立凸轮三维模型,并利用Solid Works Motion模块进行凸轮机构传动的运动仿真。运动仿真的结果表明从动件能够按照预期的运动规律运动,凸轮轮廓曲线的设计满足设计要求。与传统设计凸轮轮廓曲线方法相比,此设计方法能够大大提高计算精度与设计效率,并且具有操作简单高效,可定制性高,交互界面直观清晰等特点。
