Chuck-Guided Shaft Insert Placement for Stable Slitter Positioning
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Solution Overview
Problem
Existing disposing devices for slitter lines require long expansion/contraction strokes, making them difficult to downsize and limiting installation flexibility, while also facing issues with blade and disk movement due to clearances and deflection, which affects efficiency and stability in changing strip widths.
Innovation Solution
A tubular expansion/contraction shaft with a chuck tip and pedestal system that fills clearance between the holder and shaft, allowing smooth movement of blades and disks with reduced stroke length and improved stability, enabling precise positioning and efficient operation across varying strip widths.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing disposing devices use long expansion/contraction strokes to position blades and disks, then positioning stability is improved, but device size increases and installation flexibility decreases
Solution Approach 1:
The patent introduces a chuck mechanism as an intermediary between the piston and the blade/disk. The chuck tip contacts the holder's outer circumference surface, and the chuck base connects to the piston, creating a mechanical transmission system that amplifies the piston's small movement into precise positioning of the blade or disk without requiring long strokes
Solution Approach 2:
The patent employs an expansion/contraction shaft that can dynamically change its outer circumference diameter. When the shaft expands, it pushes the holder outward to position the blade or disk; when it contracts, it releases the holder. This dynamic sizing allows compact device structure while maintaining positioning stability
2Manufacturing precision
If existing disposing devices use long expansion/contraction strokes, then positioning accuracy is improved, but operational time increases
Solution Approach 1:
The expansion/contraction shaft dynamically adjusts its diameter to rapidly position the holder at the desired location. The pneumatic or hydraulic expansion mechanism provides fast response time, reducing operational time while maintaining positioning accuracy through controlled expansion to the precise required diameter
Solution Approach 2:
The patent uses pneumatic or hydraulic pressure to drive the expansion/contraction shaft and the piston-chuck mechanism. This allows rapid expansion and contraction actions, significantly reducing operational time compared to mechanical screw-driven systems, while maintaining positioning accuracy through controlled pressure application
3Ease of manufacture
If clearances exist between the holder and shaft, then ease of assembly is improved, but movement smoothness deteriorates
Solution Approach 1:
The chuck mechanism serves as an intermediary that eliminates the need for tight clearance between the holder and shaft. The chuck tip contacts the holder's outer circumference surface, providing stable support and smooth movement guidance during positioning, while the holder can still be easily assembled on the shaft due to the expansion/contraction mechanism creating temporary clearance when needed
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 efficient and stable positioning of blades and disks in slitter lines, reducing operational time and improving maintainability, while allowing for versatile installation and easy visualization of strip threading.
Implementation Method 1
an expansion/contraction shaft which is disposed at a predetermined position in a slitter line of metal strips and which is able to fix a holder formed integrally with a ring member
Data Source
Figure 1~2
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AI summary
A separator disposing portion 15 is provided with a ball screw 22 and an arm 23. The arm 23 is a member which comes into contact with a holder 17 and a separator disk 18, thereby allowing them to move. The arm 23 is provided with a chuck portion 30 which is connected to a piston 29 and can be fitted to a chuck pedestal 27. The chuck portion 30 comes close to or moves away from an expansion/contraction shaft 16 in association with expansion and contraction of the piston 29. Further, the chuck portion 30 comes into contact with an outer circumference surface of the holder 17, a side surface of the holder 17 and a side surface of the separator disk 18 in association with movements of the piston 29 and a driving portion 26.