Title page for ETD etd-0422104-161532

Document Type thesis

Author Name Yamartino, David E

Email Address dyamartino at alum.wpi.edu

URN etd-0422104-161532

Title Modeling, Analysis and Redesign of Cam-Follower Systems to Increase Operating Speed

Degree MS

Department Mechanical Engineering

Advisors
Robert L. Norton, Advisor
Holly K. Ault, Committee Member
Yong-Mo Moon, Committee Member
Eben C. Cobb, Committee Member
Alfred L. Duchemin, Sponsoring Organization Rep
Charles A. Gillis, Sponsoring Organization Rep
John M. Sullivan, Graduate Committee Rep

Keywords
Dynamic Modeling
Splines
Cam Acceleration Testing
Cam Design
Polydyne Method

Date of Presentation/Defense 2004-03-08

Availability unrestricted

Abstract
The Gillette Company currently uses Blade Assembly Machines (B.A.M.s) in assembling individual blades to reinforcing strips used in standard razor cartridges. The Blade Transfer Station is responsible for placing a single blade from a magazine onto the nest for future assembly work. The slice cam and linkage system slides a blade from the magazine stack and holds it over the nest while the lift cam and linkage system utilizes push tooling to place the blade onto the nest.
Cam system kinematic and dynamic analyses were conducted to fully model and analyze the current transfer cam system. The original slice cam was modeled in a cam design software package to determine position, velocity and acceleration functions. The theoretical data was compared to actual vibrational test data from a BAM at the Gillette Company. The test data shows vibrations in the system are a result of poor original cam design and a severe impact with a hard stop.
Both the slice and lift cams were redesigned using 8th and 6th order spline functions respectively to control acceleration and jerk profiles. The high dwell of the slice cam was eliminated and approximated using the spline curve to reduce the peak accelerations. The lift cam was also redesigned using a spline to accommodate the new motion of the slice cam. Both cams were installed onto a BAM running at an increased speed and an acceleration analysis was completed to show a reduction in vibrations which will lead to improved machine performance and reduction in scrap rate.

Files
Yamartino.pdf

Browse by Author | Browse by Department | Search all available ETDs

Questions? Email etd-questions@wpi.edu
Maintained by webmaster@wpi.edu

Document Type	thesis
Author Name	Yamartino, David E
Email Address	dyamartino at alum.wpi.edu
URN	etd-0422104-161532
Title	Modeling, Analysis and Redesign of Cam-Follower Systems to Increase Operating Speed
Degree	MS
Department	Mechanical Engineering
Advisors	Robert L. Norton, Advisor Holly K. Ault, Committee Member Yong-Mo Moon, Committee Member Eben C. Cobb, Committee Member Alfred L. Duchemin, Sponsoring Organization Rep Charles A. Gillis, Sponsoring Organization Rep John M. Sullivan, Graduate Committee Rep
Keywords	Dynamic Modeling Splines Cam Acceleration Testing Cam Design Polydyne Method
Date of Presentation/Defense	2004-03-08
Availability	unrestricted
Abstract The Gillette Company currently uses Blade Assembly Machines (B.A.M.s) in assembling individual blades to reinforcing strips used in standard razor cartridges. The Blade Transfer Station is responsible for placing a single blade from a magazine onto the nest for future assembly work. The slice cam and linkage system slides a blade from the magazine stack and holds it over the nest while the lift cam and linkage system utilizes push tooling to place the blade onto the nest. Cam system kinematic and dynamic analyses were conducted to fully model and analyze the current transfer cam system. The original slice cam was modeled in a cam design software package to determine position, velocity and acceleration functions. The theoretical data was compared to actual vibrational test data from a BAM at the Gillette Company. The test data shows vibrations in the system are a result of poor original cam design and a severe impact with a hard stop. Both the slice and lift cams were redesigned using 8th and 6th order spline functions respectively to control acceleration and jerk profiles. The high dwell of the slice cam was eliminated and approximated using the spline curve to reduce the peak accelerations. The lift cam was also redesigned using a spline to accommodate the new motion of the slice cam. Both cams were installed onto a BAM running at an increased speed and an acceleration analysis was completed to show a reduction in vibrations which will lead to improved machine performance and reduction in scrap rate.
Files	Yamartino.pdf