4.5 UNIORM ACCELERATION AND RETARDATION
β’
0 likesβ’281 views
This document provides steps for graphically determining uniform acceleration and retardation of a cam and follower mechanism. It involves: 1. Drawing a horizontal line representing the cam angle and a vertical line for the follower stroke. 2. Dividing the horizontal line into sections for the outstroke, dwell after outstroke, return stroke, and dwell after return stroke. 3. Dividing the outstroke and return stroke sections into equal parts and drawing lines to determine the follower motion. 4. Joining points with diagonal and curved lines to obtain the acceleration and retardation profile of the follower throughout the cam rotation.
Recommended
More Related Content
What's hot
What's hot (20)
Similar to 4.5 UNIORM ACCELERATION AND RETARDATION
Similar to 4.5 UNIORM ACCELERATION AND RETARDATION (17)
More from Kiran Wakchaure
More from Kiran Wakchaure (20)
Recently uploaded
Recently uploaded (20)
4.5 UNIORM ACCELERATION AND RETARDATION
- 1. Sanjivani Rural Education Societyβs Sanjivani College of Engineering, Kopargaon-423603 ( An Autonomous Institute Affiliated to Savitribai Phule Pune University, Pune) NAAC βAβ Grade Accredited, ISO 9001:2015 Certified Subject :- Theory of Machines II T.E. Mechanical (302043) Unit 4 Cam and Follower 4.5 Uniform Acceleration Retardation-Graphical Method By Prof. K. N. Wakchaure(Asst Professor) Department of Mechanical Engineering Sanjivani College of Engineering (An Autonomous Institute) Kopargaon, Maharashtra Email: wakchaurekiranmech@Sanjivani.org.in Mobile:- +91-7588025393
- 2. ο· S= Stroke length ο· π = π¨ππππππ ππππππππ ππ πͺππ ο· π = πͺππ πππππ ο· π πΆ = πΆππππππππ πππππ ο· π π«πΆ = π«ππππ πππππ πΆππππππππ πππππ ο· π πΉ = πΉππππππ πΊπππππ πππππ ο· π π«πΉ = π«ππππ πππππ πΉπππππ ππππππ πππππ Uniform Acceleration Retardation- Graphical Method
- 3. STEP 1. Draw horizontal line of 180mm Which denotes cam angle of 360Λ O Uniform Acceleration Retardation- Graphical Method
- 4. STEP 2. Draw vertical line length= stroke length Uniform Acceleration Retardation- Graphical Method
- 5. S STEP 2. Draw vertical line length= stroke length Vertical line denotes Displacement of Follower Uniform Acceleration Retardation- Graphical Method
- 6. S STEP 2. Draw vertical line length= stroke length Cam Angle π³ Uniform Acceleration Retardation- Graphical Method
- 7. π³ π π³ π·π π³ π·ππ³π S Cam Angle π³ STEP 3. Divide Horizontal line into 4 parts Take π³π=60mm, π³ π·π=20mm, π³π=60mm, π³π=40mm, Uniform Acceleration Retardation- Graphical Method
- 8. π³ π =90Λ π³ π·π =120Λπ³ π·π=30Λπ³π=120Λ S STEP 3. Divide Horizontal line into 4 parts Take π³π=60mm, π³ π·π=20mm, π³π=60mm, π³π=40mm, Uniform Acceleration Retardation- Graphical Method
- 9. Uniform Acceleration Retardation- Graphical Method π³ π π³ π·π π³ π·ππ³π S Cam Angle π³ STEP 4. Divide outstroke and return stroke into 6 equal parts and draw vertical line through thee points. Take π³π=60mm, π³ π·π=20mm, π³π=60mm, π³π=40mm,
- 10. Uniform Acceleration Retardation- Graphical Method π³ π π³ π·π π³ π·ππ³π S Cam Angle π³ STEP 5. Take middle part of outstroke angle i.e segment 3 and divide it into 6 equal parts.
- 11. Uniform Acceleration Retardation- Graphical Method π³ π π³ π·π π³ π·ππ³π S Cam Angle π³ STEP 6. Give the numbering to the points.
- 12. Uniform Acceleration Retardation- Graphical Method π³ π π³ π·π π³ π·ππ³π S Cam Angle π³ STEP 7. Draw one diagonal line from bottom left corner of outstroke angle.
- 13. Uniform Acceleration Retardation- Graphical Method π³ π π³ π·π π³ π·ππ³π S Cam Angle π³ STEP 7. Join first three points from bottom left corner of outstroke angle.
- 14. Uniform Acceleration Retardation- Graphical Method π³ π π³ π·π π³ π·ππ³π S Cam Angle π³ STEP 8. Join next three points from top right corner of outstroke angle.
- 15. Uniform Acceleration Retardation- Graphical Method π³ π π³ π·π π³ π·ππ³π S Cam Angle π³ STEP 9. give the proper notation to the points marked .
- 16. Uniform Acceleration Retardation- Graphical Method π³ π π³ π·π π³ π·ππ³π S Cam Angle π³ STEP 10. Draw curve through points a-b-c-d-e-f.
- 17. Uniform Acceleration Retardation- Graphical Method π³ π π³ π·π π³ π·ππ³π S Cam Angle π³ STEP 11. join points f-g(Dwell)
- 18. Uniform Acceleration Retardation- Graphical Method π³ π π³ π·π π³ π·ππ³π S Cam Angle π³ STEP 12 Again select midsection of return stroke angle (segment 10) and divide it into 6 equal parts.(Give proper notation)
- 19. Uniform Acceleration Retardation- Graphical Method π³ π π³ π·π π³ π·ππ³π S Cam Angle π³ STEP 13 Joint the segments of line 10 from top left corner and bottom left corner of return stroke.
- 20. Uniform Acceleration Retardation- Graphical Method π³ π π³ π·π π³ π·ππ³π S Cam Angle π³ STEP 13 mark the intersection point. And give the proper notation.
- 21. Uniform Acceleration Retardation- Graphical Method π³ π π³ π·π π³ π·ππ³π S Cam Angle π³ STEP 13 Draw a curve though the points.
- 22. 22Subject :- Theory of Machines II