Roll-Former Sweep Box with Rapid-Adjust Actuators
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Solution Overview
Problem
Existing roll-forming apparatuses struggle to efficiently produce roll-formed beams with multiple sweep radii along their length during continuous operation, leading to uncontrolled twisting, snaking, and dimensional variations, especially when forming tight sweeps, due to the limitations of manual or power-adjusted sweep stations that cannot adjust quickly enough to accommodate varying curvatures at high production speeds.
Innovation Solution
A computer-controlled adjustable sweep station with a multi-segment external mandrel and actuators that allow for rapid adjustment of sweeps along the beam, enabling the formation of different sweep radii and sequences, including constant, changing, and linear sections, while maintaining control over beam deformation and minimizing secondary processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If manual or power-adjusted sweep stations are used, then the apparatus can form sweeps in the beam, but it cannot adjust quickly enough to accommodate varying curvatures at high production speeds
Solution Approach 1:
The sweep station employs a dynamically adjustable mechanism where the sweep radius can be changed during continuous operation. The system uses adjustable rollers and support structures that can be repositioned along the beam length, enabling rapid transition between different sweep radii without stopping production, thus resolving the contradiction between adjustment speed and precision.
Solution Approach 2:
The invention changes the physical parameters of the sweep station components, specifically the position and configuration of rollers and support structures. By adjusting these parameters dynamically during production, the system can accommodate varying sweep radius requirements while maintaining precision through controlled parameter variation rather than manual intervention.
2Shape
If multiple sweep radii are formed in a single beam section, then the aerodynamic appearance is enhanced, but uncontrolled twisting and snaking occur
Solution Approach 1:
The beam is divided into multiple sections, each with its own sweep radius characteristics. The sweep station processes different beam segments with different curvature parameters sequentially, allowing controlled variation in shape while maintaining overall structural stability through systematic segmentation of the forming process.
Solution Approach 2:
The invention introduces intermediary support structures and control mechanisms between the sweep-forming rollers and the beam. These intermediaries include support rollers and positioning devices that prevent uncontrolled twisting and snaking while allowing the desired multiple sweep radii to be formed, thus mediating between shape variation and structural stability.
3Shape
If tight sweeps are formed, then the aerodynamic appearance is improved, but dimensional variations increase
Solution Approach 1:
The sweep station incorporates feedback control mechanisms that monitor the beam dimensions during the sweeping process. When tight sweeps are formed, the system detects dimensional variations and adjusts roller positions and forces in real-time to compensate, maintaining dimensional consistency while achieving the desired tight sweep geometry for aerodynamic appearance.
4Shape
If secondary operations are used to form bumper ends with increased rearward sweep, then the aerodynamic appearance is enhanced, but cost and in-process inventory increase
Solution Approach 1:
The invention merges the sweep-forming operation with the main roll-forming process. Instead of performing secondary operations after the beam is formed, the sweep station integrates curvature formation into the continuous production line, combining multiple functions into a single integrated system that eliminates secondary processing steps and improves productivity.
Solution Approach 2:
The sweep station performs the sweep-forming action preliminarily, during the main production process rather than as a subsequent operation. By pre-forming the required curvatures and end sweeps while the beam is being produced, the system eliminates the need for later secondary operations, reducing both cost and in-process inventory while maintaining the desired aerodynamic shape.
Data Source
AI summary
A computer controlled roll-forming apparatus is adapted to provide a repeating pattern of different longitudinal shapes to a continuous beam “on the fly” during the roll-forming process. A sweep station of the apparatus includes a primary bending roller tangentially engaging the continuous beam along the line level and an armature for biasing the continuous beam against the primary bending roller for a distance partially around a downstream side of the primary bending roller to form a sweep. Actuators adjustably move the armature partially around the downstream side of the primary bending roller between multiple positions for imparting a series of different longitudinal shapes. Internal and external mandrels control wall stability to allow even sharper sweeps. In one form, the apparatus also includes a coordinated cut-off, so that when separated into bumper beam segments, the ends of the individual beam segments have a greater sweep than their center sections.