机械原理英文版2Camdesign.ppt

Cam Design Review 1)S=kθ Cam Design Review 3) Cam Design Review What is mean for SVAJ diagram Cam Design Review Cam Design Review Key points for Cam CAD design 1)Give out the coordinate of cam surface curve (x,y); known: cam size, displacement function 2) Drawing the diagram of Cam surface curve in Matlab by using function plot(x,y) or polar(sita,r) 3) Check the pressure angle for designed cam surface curve Cam Design--1 Analyzing Method Cam and mushroom follower Cam Design--2 Analyzing Method Cam and roller follower review - Instant center Example4 Cam Design-3 Analyzing Method Cam and flat-face follower Cam Design-4 Analyzing Method Cam and oscillating follower review Transmission angle μ (传动角） Definition：the angle between the output link and the coupler (force) Pressure angle: the angle between the velocity direction of output link and the coupler (force) Pressure angle in cam Pressure angle Sizing the Cam Pressure angle Sizing the cam Eccentricity Cam Design Sizing the cam Cam Design Sizing the cam Cam Design Sizing the cam Overturning moment Cam Design Sizing the cam Size of roller Cam Design Sizing the cam Cam Design Sizing the cam Cam Design Sizing the cam Cam Design Sizing the cam Cam Design homework 1) Graphical design cam surface curve with flat face follower, the displacement is given by Cam CAD Design project (due day Oct.14) A) Computer design cam surface curve and roller follower where the diameter of roller is rb=8mm, the displacement is given by Requirement of Cam CAD project : Objective SVAJ curve Formula for designing cam surface curve Diagram of pitch curve and cam surface curve Pressure check for cam surface curve Matlab code * 1, Finish home work on time 2, Drawing tool for machinery course 90 180 270 0=θ90 Determine s(θ) ? s θ o Followe