Roll Press Deflection Sensing and Counter-Bending for Uniform Thickness
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Solution Overview
Problem
Existing roll press apparatuses risk producing workpieces with non-uniform thickness in the width direction due to deflection of the rolls, which is not adequately addressed by post-process thickness adjustments.
Innovation Solution
The apparatus includes a sensor unit to measure roll deflection and a control unit that operates bending units to apply counter-deflections, adjusting the rolls' alignment to ensure uniform thickness by pre-emptively correcting deflection before the roll press process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If thickness adjustment is performed after the roll press process based on sensor detection, then the target thickness can be achieved, but workpieces with non-uniform thickness in the width direction may already have flowed to the sensor position
Solution Approach 1:
The invention applies preliminary action by detecting roll deflection before the roll press process and applying counter-deflection in advance. The sensor unit measures the shapes of the rolls to detect deflection, and the control unit operates bending units to apply counter-deflection before the actual pressing occurs. This proactive approach prevents non-uniform thickness from occurring in the first place, rather than detecting and correcting it after the workpiece has already been pressed and may have flowed to the sensor position.
Solution Approach 2:
The invention applies preliminary anti-action by using the bending units to apply counter-deflection to the rolls in opposition to the expected deflection direction. The control unit operates the bending units such that counter-deflection is applied to cancel out the roll deflection before the pressurizing units apply load during the roll press process. This preemptive counter-action ensures the rolls maintain proper alignment and prevent non-uniform thickness generation at its source.
2Manufacturing precision
If roll deflection is not corrected, then the apparatus structure remains simple, but workpieces with non-uniform thickness are generated
Solution Approach 1:
The invention applies segmentation by dividing the support system into multiple independent bearing units. The rotation shafts are supported by first and second bearings at respective ends, with additional bending bearings (first bending bearing, second bending bearing, third bending bearing, fourth bending bearing) positioned at different locations. This segmented bearing arrangement allows independent adjustment of each bearing position through dedicated bending units, enabling precise control of roll deflection without requiring complete redesign of the entire apparatus structure.
Solution Approach 2:
The invention introduces intermediary elements in the form of bending units that act as mediators between the fixed bearing supports and the rotation shafts. These bending units (first bending unit, second bending unit, third bending unit, fourth bending unit) apply localized loads to specific bending bearings to generate counter-deflection. This intermediary mechanism allows for precise control of roll alignment without directly modifying the rotation shafts or the pressurizing system, adding minimal complexity while achieving the desired precision.
Data Source
AI summary
A roll press apparatus includes a sensor unit configured to measure shapes of a first roll and a second roll to detect deflection of the first roll and the second roll, and a control unit configured to, in response to detection of the deflection by the sensor unit, operate at least one of a first bending unit and a second bending unit such that a counter-deflection is applied to the first roll and the second roll.