Cam Mechanism Vibration Control in Printing Presses
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Printing presses with cam mechanisms experience disruptive vibrations due to non-uniform transmission ratios, limiting flexibility and process reliability, and existing solutions either fail to reduce vibrations effectively or increase structural complexity.
Innovation Solution
A cam mechanism with a curvature course featuring points that are not constantly differentiable, adapted to resonate with the assembly's vibration behavior, combined with an electronically controlled actuator to adjust movement according to printing speed, reducing vibrations and maintaining process reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a cam mechanism with non-uniform transmission ratio is used to achieve high movement precision and process speed, then movement accuracy and process speed are improved, but disruptive vibrations are excited in the assembly
Solution Approach 1:
The patent applies vibration theory by designing a cam mechanism where the curvature course is specifically configured to resonate with the natural frequency of the assembly. By matching the cam's vibration characteristics to the assembly's resonant frequency, the system achieves exact resting phases that eliminate disruptive vibrations while maintaining high movement precision and process speed.
Solution Approach 2:
The patent changes the curvature parameter of the cam mechanism by introducing points that are not constantly differentiable in the curvature course. This parameter modification allows the cam to produce controlled vibrations that counteract disruptive vibrations, enabling the system to achieve both high movement accuracy and vibration reduction simultaneously.
2Measurement precision
If the cam curvature course is fixed to achieve high movement precision, then movement accuracy is improved, but flexibility to adapt to different operating states is lost
Solution Approach 1:
The patent applies dynamics by making the cam mechanism adaptable to different operating states through electronic control. The system can adjust the cam curvature course or activation timing based on printing speed and operating conditions, allowing the fixed cam structure to achieve both high movement precision and flexibility in adapting to various operational requirements.
3Object-affected harmful factors
If points not constantly differentiable are introduced in the curvature course to reduce vibrations, then vibrations are reduced, but structural complexity increases
Solution Approach 1:
The patent converts the potential harm of complex cam curvature design into a benefit by intentionally introducing points that are not constantly differentiable. These mathematical discontinuities in the curvature course generate controlled vibrations that resonate with the assembly's natural frequency, creating exact resting phases that eliminate disruptive vibrations. The increased structural complexity is justified by the significant vibration reduction achieved.
Data Source
AI summary
A printing press includes an assembly and a cam mechanism for moving at least one part of the assembly. A cam of the cam mechanism has a curvature course with points, in particular bends or jumps, which are not constantly differentiable within a movement region of the cam. The cam mechanism can include an actuator for the temporal displacement of jolts which are induced by the points that are not constantly differentiable to the at least one part of the assembly. An adaptation of the movement which is produced to the operating state of the printing press is possible, with the result that a considerable reduction can be achieved in vibrations for all printing speeds.