Rolling Unit Eccentric Bushing Gap Adjustment
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Solution Overview
Problem
Existing rolling units are bulky, complex, and expensive, requiring inter-stand guides and resulting in increased off-cuts and structural weakening due to the need for extensive support structures, which hinders compactness and efficiency in rolling operations.
Innovation Solution
A compact rolling unit design with motorized shafts and eccentric support elements, utilizing a gear-based adjustment mechanism that allows for precise gap adjustment between rolls without increasing the inter-stand bulk, eliminating the need for inter-stand guides and reducing the overall length of the rolling line.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a traditional worm screw adjustment device is used between rolling stands, then the gap between rolls can be adjusted, but the overall bulk of the rolling unit increases and inter-stand guides become necessary
Solution Approach 1:
The patent repositions the adjustment mechanism from the inter-stand space to the intrastand space. The eccentric bushing is integrated within each rolling stand, allowing gap adjustment without occupying the space between stands. This dimensional repositioning eliminates the need for inter-stand guides and reduces the overall bulk of the rolling unit.
Solution Approach 2:
The adjustment mechanism is nested within the rolling stand structure itself. The eccentric bushing is housed inside the stand framework, with its adjustment components integrated into the existing structural elements. This nesting approach allows the adjustment device to function without increasing the external dimensions of the rolling unit.
2Adaptability or versatility
If the worm screw is positioned to engage both toothed portions, then adjustment function is achieved, but the support structures are weakened and structural complexity increases
Solution Approach 1:
The adjustment function is segmented and distributed to individual rolling stands rather than being centralized between stands. Each stand has its own eccentric bushing that can be adjusted independently, eliminating the need for a single large worm screw that would compromise the bearing structure. This segmentation allows each stand to maintain full structural integrity while still providing adjustment capability.
3Volume of stationary object
If rolling stands are placed closer together to reduce bulk, then space efficiency improves, but inter-stand guides are required and off-cuts increase
Solution Approach 1:
The adjustment mechanism is moved from the inter-stand dimension to the intrastand dimension. By integrating the eccentric bushing within each stand, the patent enables closer stand placement without requiring inter-stand guides, thus resolving the conflict between space efficiency and structural complexity.
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 enables a more compact, economical, and efficient rolling unit that reduces off-cuts and structural complexity, allowing for closer stand placement without the need for inter-stand guides, thereby optimizing space usage and production simplicity.
Implementation Method 1
The shafts supporting the rolls are supported by an eccentric bushing that is provided with a through hole in which each shaft of the rolls is housed. The through hole of the eccentric bushing is made mis-aligned axially with respect to the longitudinal axis of the bushing. In this way, by making the eccentric bushing rotate, a variation is determined in the position of the axis of rotation of the shaft.
Data Source
AI summary
Rolling unit including at least two adjacent rolling stands, each having a pair of rolling rolls mounted on respective motorized shafts. The rolls of one rolling stand are disposed orthogonal and close to those of the adjacent rolling stand. The shafts are eccentrically supported in respective support elements, which are selectively rotatable around their axis and are each provided with rotation means to cooperate mechanically with an adjustment member suitable to make the support elements selectively rotate to determine an adjustment of the gap between the rolls. The rotation means of one pair of the support elements are directly connected kinematically to each other. The adjustment member is disposed, with respect to the rolling stands, so that the center of its gear lies very close to the line joining the centers of the support elements, so that a substantial part is contained in the bulk defined by the rolling stand.