摘要本文在研究了尖顶和滚子从动件的几种运动方式后，以平面盘型凸轮中的直动运动为例，在Windows 平台上以VB作为开发语言，在统一的廓线、压力角、曲率半径、滚子半径等表达式下，开发出了一套适合平面凸轮机构的计算机辅助设计系统，该系统可同时实现凸轮机构的设计数据校核、凸轮廓线的设计、相关运动参数的输出以及直观的运动规律曲线及其实际廓线的图形输出等，并且通过VB编程，实现了模拟仿真凸轮机构的工作过程。50231

本次设计根据包络理论、反转法原理，通过定义各基本的参数和选择不同要求的组合方式，推导出了平面盘形凸轮机构理论廓线的通用方程，这使得凸轮廓线坐标计算的程序大大的简化了。而本文中以常用的四种运动规律为例，按照其运动规律的表达式，结合在了VB编程中，只要选定了运动规律，其对应的运动参数方程就直接调用到VB程序中。

本文以尖顶和滚子从动件平面盘形凸轮机构为例，按照其统一的各个参数的表达式，开发出了简单易懂的计算机辅助设计系统。另外本文也通过计算机强大的计算以及速度功能，以VB编程介质，对相关参数首先进行校核计算，从很大程度上完善了计算机辅助设计系统，为设计者验证凸轮机构的可行性提供了一定的帮助。在最后通过直观的图形输出，为设计者提供了一定的设计依据，而结合文本输出，为凸轮的实际加工，提供了坚实的数据基础。

毕业论文关键词：盘形凸轮机构；计算机辅助设计系统；VB

 Abstract In this paper, after we studied several different sports of the spiers and roller followers, we exampled linear motion of the disk-shaped cam and plat-forming to VB on the Windows which as a development language. We developed a set of planar cam mechanisms for computer-aided design system in an unified profile, pressure angle, the radius of curvature of the roller radius expression, which can achieve a cam mechanism for checking the design data, the design of the convex contour, the relevant motion parameters outputs and intuitive movement of the curve and the actual profile of the graphical output, etc., and through the VB programming simulated the cam mechanism’s working.

The design based on the envelope theory and inversion method principle, by defining the basic parameters and selecting a different combination required to derive a flat disk cam mechanism common theoretical contour equation, which makes the convex contour coordinates calculation procedures greatly simplified.

Also, four common law of motion are exampled, in accordance with its laws of motion expressions, combining in a VB programming, the corresponding equation of motion parameters directly call into the VB programs as long as the law of motion is selected.

In this paper, we exampled spiers and roller follower of the flat disk cam mechanism, in accordance with its unified expression of various parameters, developed a straightforward computer-aided design system. And through the VB programming, a computer and a powerful computing speed function first be checked to against the relevant parameters calculated from the largely improve the computer-aided design system for the designer to validate the feasibility of the cam mechanism provides a certain help.Through an intuitive graphical output, we are providing a certain design basis to designers and combining text output for the actual processing of the cam which provide a solid data foundation.

Key words: disk cam mechanism; computer-aided design system; VB 

目  录

第一章  绪论 1

1.1 凸轮机构简述 1

1.2 凸轮机构的分类 1

1.3 凸轮机构CAD系统概述