Sheet Processing Device Vibration Cancellation via Periodic Acceleration
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Solution Overview
Problem
Conventional sheet processing devices face a trade-off between productivity and vibration control, where controlling vibrations to prevent noise and maintain accuracy leads to decreased productivity due to longer movement times of stitching or punching units, and prioritizing productivity increases vibrations during unit movement.
Innovation Solution
A sheet processing device that employs a drive-mode determining unit to combine first and second accelerations with a time shift based on the natural vibration cycle, allowing the sheet processing unit to move with a combination acceleration that cancels out natural vibrations, thereby preventing noise and maintaining accuracy without sacrificing productivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the stitching processing unit is moved to perform sheet processing, then productivity is improved, but natural vibration occurs during movement
Solution Approach 1:
The patent applies periodic action by controlling the acceleration profile of the stitching processing unit to coincide with the natural vibration cycle. The acceleration is adjusted periodically to cancel out vibrations, allowing the unit to move quickly while maintaining stability. This resolves the contradiction by enabling high-speed movement (productivity) without generating harmful vibrations.
2Stability of the object's composition
If the acceleration of the stitching processing unit is controlled to prevent vibration, then vibration is reduced, but the movement time becomes longer
Solution Approach 1:
The patent changes the acceleration parameter dynamically during movement. Instead of using constant or simply controlled acceleration, the system adjusts the acceleration profile to match the natural vibration cycle characteristics. This allows the stitching processing unit to reach higher speeds faster while using acceleration variations to counteract vibrations, thereby reducing movement time without compromising vibration control.
3Productivity
If sheet processing is conducted while vibrations occur, then productivity is maintained, but sheet processing accuracy is degraded
Solution Approach 1:
The patent implements feedback control by monitoring the vibration state during stitching processing and adjusting the acceleration in real-time. The system detects when vibrations occur and modifies the acceleration profile to cancel them out, ensuring that sheet processing accuracy is maintained even during continuous high-speed operation. This resolves the contradiction by enabling continuous processing without sacrificing precision.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution effectively reduces natural vibrations during sheet processing, enhancing accuracy and productivity by generating a drive profile that cancels out natural vibrations, allowing for smoother and more efficient operation of stitching and punching units.
Implementation Method 1
a cycle of natural vibration that occurs during acceleration of the sheet processing unit
Implementation Method 2
combination acceleration that is a combination of first acceleration and second acceleration with a shift of time that is determined based on a cycle of natural vibration
Data Source
AI summary
A sheet processing device includes a sheet processing unit that is moved to perform sheet processing on a sheet; a sheet-processing moving unit that moves the sheet processing unit; a drive-mode determining unit that determines a drive mode of the sheet-processing moving unit; and a drive control unit that drives the sheet-processing moving unit in accordance with the drive mode. The drive-mode determining unit determines the drive mode such that the sheet processing unit is moved at combination acceleration that is a combination of first acceleration and second acceleration with a shift of time that is determined based on the cycle of the natural vibration that occurs during acceleration of the sheet processing unit.