Department of Mechanical Engineering ME EN 4000 - Engineering Design I Engineering Lab 8 Assigned: Thursday, November 10, 2005 Due: Friday, November 18, 2005, 1:00PM, to the ME4000 basket in 2110 MEB Do not email completed assignment to Prof. Provancher. Make alternate arrangements with TAs if necessary. The TAs are, in general, the primary graders of your labs. Introduction This lab provides an introduction to the assembly of mechanisms and a means to animate the assembly. Task From the ME4000 wiki, download all part files required for the assembly of the mechanism. Starting with the base, assemble all parts of the mechanism (base, links, piston, sleeves, and pins). Create two engineering drawings or screen shots showing the mechanism at the two extreme positions of the piston (i.e., bottomed out at the ends of travel, see video on the ME4000 wiki). When you do this, you must create a cross section that cuts through the piston cylinder to show the position of the piston rod. In increments of 0.5 inches, change the stroke of the piston and record the resulting distance in the horizontal and vertical direction of the bore located at the end of link3. Hand in the two drawings and the completed table from page 2. Hints • It is absolutely critical to have all components be fully constrained. • You assembly will require (1) long pin and (4) short pin and (12) sleeve bearings. Name: ID #:• To achieve the desired increments, it may be useful to make a constraint on the distance between the piston face and the end of the piston cylinder. This value can be incremented to match the values in Table 1. • Note that the y-dimension is from the bottom of the plate. • The position of the center point of the end of link 3 (labeled “End bore” above) is given in the first entry in Table 1. This position corresponds to where the piston is bottomed out nearest the base plate. Verify that this matches the position in your assembly before proceeding in filling out Table 1. What to hand in • Screen shots or drawings of the (side) section view of the mechanism in the extreme positions listed in Table 1. • Table 1 with all corresponding x-y values • Please write down the amount of time it took you to complete this lab Table 1 Piston Stroke [in] X [in] Y [in] 0 (piston bottomed out in piston cylinder near pin joint to base) 10.48 21.94 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5Optional (not graded): Create an animation of your assembly To do this in Student SolidWorks2004-2005, Click the Assemblies Tab Æ Simulation Æ Linear Motion Select piston & direction & velocity Click the Assemblies Tab Æ Simulation Æ Calculate Simulation (note that you will have very bad results if your assembly is not fully constrained To replay and bring up other playback options, Click Assemblies Tab Æ Simulation Æ Replay Simulation (this will bring up the “Animaiton Controller,” try to loop and reciprocate options) To record this animation to an .avi movie Click Tools Æ Add-Ins Æ scroll down and click “SolidWorks Animator” (You may have to restart SolidWorks in order to get this to function properly) Click the “Animator” menu Æ Turn on screen capture Give file a name and adjust settings (you may want higher than 7.5 Frames/sec.) and click OK In the next popup window you can adjust compression settings if desired Click Assemblies Tab Æ Simulation Æ Replay Simulation (or move model in other desired fashion. Click the “Animator” menu Æ Turn off screen capture Your movie file will be saved and is ready to view. The TAs will try to demonstrate the analogous steps in ProE in