Autodesk Inventor 2010 Education Curriculum

Transcription

1 Page 1 of 9 Autodesk Inventor 2010 Education Curriculum Open the File A robot design team started designing the chain drive assembly. In discussion with the team, you discover that they are designing the chain drive using traditional 3D modeling techniques. You inform them that using the Roller Chains Generator is a better workflow. This workflow illustrates how functional design provides a quick solution to a complex design problem. The design team posted the partially complete chain drive so that you can finish the design. The following design criteria is already determined: Use an ISO : Motor Cycle Chain. One sprocket is already modeled. It is the driver sprocket and it has 17 teeth. 1. Open Lesson9Drive_System_Sprocket.iam. 2. Zoom and pan to view the existing sprocket and the shaft for the new sprocket. Design the Chain Drive Using the Roller Chains Generator, you use the existing driver sprocket and design a second

2 Page 2 of 9 sprocket. Your objective is to prove that the existing sprocket and chain selected by the design team is functional. 1. On the Design tab, Power Transmission panel, click the arrow beside V-Belts. Click Roller Chains. 2. Under Chains, click Browse for a Chain. 3. Note that the Method defaults to Browse for a Chain by Size. 4. Select ISO 10190: Motor Cycle Chains. 5. For Chain Designation, double-click 04 MA. The chain is listed.

3 Page 3 of 9 6. Click Select Chain Mid Plane. 7. Select the face of the bushing as shown. 8. For Mid Plane Offset, enter Under Sprockets, for the first sprocket, select Virtual from the list. Virtual does not insert a sprocket into the assembly.

4 Page 4 of For placement type, select Fixed Position by Selected Geometry. 11. Select the outside face of the existing sprocket. The chain drive preview is displayed.

5 Page 5 of Click Properties. 13. For Teeth, enter 17. Click OK. Note: You can also drag the size grips on the sprocket to change the number of teeth. 14. Under Sprockets, select sprocket 2. Change placement type to Free Sliding Position.

6 Page 6 of 9 The color of sprocket 2 changes, indicating that a chain drive solution is possible based on the current settings. The size of the sprocket is too large and the location is incorrect. 15. On sprocket 2, drag the size handle to resize the sprocket to z = ul. Note: The sprocket is not centered on the shaft. The objective is to determine if chain drive design is compliant and if the assembly can be adjusted to accommodate the design. 16. Drag the sprocket close the shaft. The color of the sprockets remains the same, indicating that a solution

7 Page 7 of 9 is possible using these parameters. 17. Click OK twice. The chain drive is displayed. 18. In the browser, right-click the Chain Drive:1. Click Edit Using Design Accelerator. 19. On the Calculation tab, under Working Conditions: Select Torque, Speed > Power. For Torque, enter 1 N m. For Required Service Life, enter 1650 hr. For Application, select Heavy Shocks from the list. Under Environment, click Soiled from the list. Under Lubrication, select Manual from the list. 20. If the calculation window is not visible, click the chevron. 21. Click Calculate. The design is compliant. 22. Click OK. Measure the Center-to-Center Distance The design team needs confirmation that the chain drive design is compliant, and that the assembly can be adjusted for the center-tocenter distance between the two sprockets. You now measure the distance. 1. In the browser, right-click Chain Drive:1. Click Open. 2. On the ViewCube, click Home.

8 Page 8 of 9 3. On the Tools tab, Measure panel, click Distance. 4. Select the Z axis of the sprocket. 5. Select the Z axis of the virtual sprocket. The distance is displayed. Your distance will vary. In the next step you determine if this value meets the design criteria.

9 Page 9 of 9 6. Close the Measure Distance dialog box and close the file. Do not save changes. The center-to-center distance appears to be acceptable. A review of the assembly shows that there is adequate adjustment on the plate as shown. 7. Save the file.