Roll-Forming Roller Control for Variable Hat Beam Flanges
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Solution Overview
Problem
Existing roll-forming machines face challenges in forming hat beams with varying central flange curvature or inclination, leading to undesired bending stresses and limitations in forming beams with small central flange widths.
Innovation Solution
A roll-forming machine with individually displaceable clamping rollers, controlled by an electronic device, to maintain a perpendicular plane through the center axes of the clamping rollers relative to the central flange, allowing for adaptation to curvature or inclination and enabling the formation of hat beams with varying central flange designs, including those with small widths.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If fixed clamping rollers are used in existing roll-forming machines, then the machine structure is simple, but the machine cannot adapt to hat beams with varying central flange curvature or inclination, leading to undesired bending stresses
Solution Approach 1:
The clamping rollers are made individually displaceable in vertical and horizontal directions during the forming operation, transforming the static fixed structure into a dynamic adjustable one. This allows the rollers to adapt to varying central flange curvature and inclination while maintaining perpendicularity through electronic control, resolving the contradiction between adaptability and structural simplicity.
Solution Approach 2:
An electronic control device monitors and controls the displacement of clamping rollers to maintain the plane through their center axes perpendicular to the central flange. This feedback control system ensures accurate adaptation to varying flange geometries while managing the complexity of the displacement mechanism.
2Manufacturing precision
If fixed clamping rollers are used, then the device complexity is low, but the manufacturing precision deteriorates due to induced bending stresses in curved or inclined central flanges
Solution Approach 1:
The electronically controlled displacement system dynamically adjusts roller positions to maintain perpendicularity with the central flange throughout the forming operation. This dynamic adjustment prevents induced bending stresses in curved or inclined flanges, achieving high manufacturing precision despite the increased system complexity.
Solution Approach 2:
The mechanical fixed constraint system is replaced with an electronically controlled displacement system that uses sensors and actuators to maintain precise roller positioning. This substitution of mechanical control with electronic control enables higher precision in forming complex flange geometries.
3Adaptability or versatility
If fixed clamping rollers are used, then the machine design is simple, but the versatility is limited for forming hat beams with small central flange widths
Solution Approach 1:
The individually displaceable clamping rollers can adjust their positions vertically and horizontally, enabling the machine to accommodate various central flange widths including small widths. This dynamic positioning capability provides versatility for different hat beam designs while managing the complexity through electronic control.
Solution Approach 2:
The roll-forming machine with displaceable clamping rollers achieves multi-functionality by being able to form various hat beam types including those with small central flange widths, curved flanges, and inclined flanges. This universal capability is achieved through the electronically controlled displacement system.
Data Source
Figure 1a~2c
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Figure 7
AI summary
Roll-forming machine for forming, from a flat sheet metal strip (5), a hat beam which has a profile that varies along its length. The machine comprises several consecutively arranged forming stations, each of which comprising a first pair of clamping rollers (22a, 22b) for clamping a side flange (3a) of the hat beam and a second pair of clamping rollers (23a, 23b) for clamping a central flange (2) thereof. The clamping rollers of said second pair are individually displaceable in vertical direction and horizontally in the feeding direction of the sheet metal strip. The displacement of the clamping rollers (23a, 23b) of said second pair is controlled by an electronic control device during a forming operation such that a plane that goes through the centre axes (CA3, CA4) of both these clamping rollers is maintained perpendicular to the part of the central flange (2) received in the nip (31) between these clamping rollers.