Design and Fabrication of Multi-speed Bicycle Sprocket on CNC Milling Machine

International Journal of Industrial Engineering

© 2020 by SSRG - IJIE Journal

Volume 7 Issue 2

Year of Publication : 2020

Authors : Adib Bin Rashid, M.A. Rashid Tipu

10.14445/23499362/IJIE-V7I2P102

How to Cite?

Adib Bin Rashid, M.A. Rashid Tipu, "Design and Fabrication of Multi-speed Bicycle Sprocket on CNC Milling Machine," SSRG International Journal of Industrial Engineering, vol. 7,  no. 2, pp. 7-11, 2020. Crossref, https://doi.org/10.14445/23499362/IJIE-V7I2P102

Abstract:

Now a day's cycling is a passion for the young generation of Bangladesh. Multi-speed bicycles are most preferable to them as it allows gear selection to suit the circumstances: a cyclist could use a high gear when cycling downhill, a medium gear when cycling on a flat road, and a low gear when cycling uphill. On a Multi-speed bicycle, the cogset or cluster is the set of multiple sprockets that attaches to the hub on the rear wheel to provide multiple gear ratios to the rider. Manufacturing of sprocket in an accurate dimension is a challenge to the cycle manufacturing industry. Generally in Bangladesh, sprocket teeth are cast or flame cut of sheet metal which is almost as accurately as manufactured in Milling, shaper, or even CNC Hobbing Machine. This paper aims to show a systematic way to cut sprocket teeth in 3 Axis CNC Milling Machine. For this purpose, at first, a 14 teeth sprocket is designed as ASME B29 standard. Then a CAD model is generated on Solid works according to the designed dimension. Thereafter, the G-code for milling operation is generated and simulation of the manufacturing process is investigated by Master Cam software. Then the G-code is transferred to the CNC Milling machine and the operation is done sequentially. It has observed that cutting sprocket teeth on CNC Milling is suitable for industrial production as various dimensions measured after manufacturing are found almost as accurate as of the theoretical one.

Keywords:

Cogset, Sprocket, CNC Milling Machine, Master Cam

References:

[1] Cogset [Online]. Available: https://en.wikipedia.org/wiki/Cogset
[2] Shimano Cassettes & Free hubs.[Online]. Available: http://www.sheldonbrown.com/k7.html
[3] Babaev, A. S., and Pyzhik, D. Yu. (2010), Optimization of the design-technological cycle time of the manufacturing parts using CAD/CAM/CAE system for example chain sprocket, Modern Technique and Technologies 2010, vol. XVI, pp. 26-28.
[4] Gavrilaş, and Voicu I. N. (1982) Manufacturing technology of gearwheels on classical machine tools and with of program's command, edition 1, Technical Publishing House Bucureşti, România, p 154, p 157, p 175, p 333-334.
[5] Chain for Power Transmission and Material Handling. [Online].Available: https://books.google.com.bd/books?id=hnYZBwAAQBAJ&printsec=frontcover#v=onepage&q&f=fals
[6] Prashanth P V, Sachidananda H K, "Design and Fabrication of Special Purpose Tool Fixture for CNC Turrets" SSRG International Journal of Mechanical Engineering 3.1 (2016)