Segmented Pressing Rollers for Uniform Wide Band Feeding
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Solution Overview
Problem
Existing forward feed supply devices for wide band materials face issues with drum bending and non-uniform feeding due to weight and external forces, leading to uneven wear and processing disturbances, particularly in cyclically operating machines like stamping and forming machines.
Innovation Solution
A forward feed supply device with a rotating drum and multiple pressing units that apply adjustable, individually controlled pressing forces to maintain uniform feeding, using sensors for orientation correction and actuator devices to compensate for thermal and wear-related changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If long drums are used to feed wide band material, then the feeding width is increased, but the drums bend due to their own weight or external pressing forces
Solution Approach 1:
The drum is divided into multiple independently adjustable pressing units distributed along the drum width. Each pressing unit can be individually controlled to apply localized pressing forces, allowing the drum to maintain its shape across wide feeding widths without requiring the entire drum to be rigidly strengthened.
Solution Approach 2:
The pressing units are made dynamically adjustable during operation. The pressing forces can be varied independently for each unit to compensate for drum bending caused by weight or external forces, enabling the system to adapt to changing conditions and maintain uniform feeding pressure across the drum surface.
2Shape
If drums are made cambered to counteract bending, then drum bending is reduced, but manufacturing complexity and cost increase
Solution Approach 1:
Instead of changing the physical geometry of the drum through complex cambered manufacturing, the invention changes the operational parameters by applying adjustable pressing forces through multiple independently controlled units. This allows dynamic compensation for bending without requiring complex manufacturing processes.
Solution Approach 2:
The system replaces static geometric corrections (cambered drums) with dynamic force adjustments. The pressing units can be adjusted during operation to counteract bending effects, eliminating the need for complex manufacturing while achieving the same functional result.
3Shape
If increased pressing force is applied to prevent drum bending, then drum shape is maintained, but non-uniform wear and slip occur across the drum width
Solution Approach 1:
Each pressing unit can apply locally optimized pressing forces tailored to the specific requirements at different positions across the drum width. This allows the system to maintain drum stability while preventing non-uniform wear and slip by adjusting the pressing force distribution to match the actual conditions at each location.
Solution Approach 2:
The pressing forces are dynamically adjusted for each unit based on real-time conditions, allowing the system to maintain uniform feeding pressure and prevent non-uniform wear while keeping the drum stable. The independent control of each pressing unit enables precise localization of pressing forces.
4Manufacturing precision
If multiple independently controlled pressing units are used to ensure uniform feeding, then feeding uniformity is improved, but device complexity increases
Solution Approach 1:
The pressing system is segmented into multiple independently controllable units, each responsible for a specific zone across the drum width. This segmentation enables precise local control to achieve uniform feeding while keeping each individual unit relatively simple in design.
Solution Approach 2:
Multiple pressing units share common structural support and control mechanisms, allowing them to perform multiple functions simultaneously (supporting the drum, applying pressing force, and enabling independent adjustment). This multi-functionality reduces the overall system complexity despite having multiple units.
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
Ensures reliable, uniform feeding of wide band materials by minimizing drum bending and wear, improving processing accuracy and reducing disturbances in cyclic operations.
Implementation Method 1
the band material is passed through two drums... One of the two drums can be driven by means of a drive unit... in case of drums having a plastic coating for smooth feeding of the fed band material
Data Source
AI summary
A forward feed supply device for feeding band material in a feeding direction. Band material is in contact with a drum contact surface of a forward feed drum. The drum contact surface corresponds to the circumferential jacket of a cylinder and can be a plastic surface. The forward feed drum can be rotatingly driven around a drum axis by a drive unit. The drum axis extends in a transverse direction orientated orthogonal to feeding direction. Multiple pressing units are arranged next to one another in transverse direction and press the band material with a defined pressing force against drum contact surface. Each pressing unit can comprise a pressing roller. The pressing roller has a roller contact surface that can be a plastic surface analog to the drum contact surface. For control of the pressing units and/or the drive unit the forward feed supply device can comprise a control device.