Amorphous Alloy Ribbon Heating With Rear-Side Pressed Contact
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Solution Overview
Problem
Existing heat treatment methods for amorphous alloy ribbons face challenges in minimizing anisotropy in magnetic characteristics and require high tension to ensure uniform contact, which can lead to inconsistent heat treatment due to surface undulation and limited application of ribbons with strong magnetic anisotropy.
Innovation Solution
A heat treatment method and apparatus that involves pressing an amorphous alloy ribbon against a heated projected surface using a flexible metal member from the opposite side of contact, allowing for uniform heating and minimizing tension, with a heat treatment apparatus featuring a combination of heating and pressing parts that reverse positions along the ribbon's travel direction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If high tension is applied to the ribbon to secure sufficient contact with the roller surface, then thermal contact is improved, but magnetic anisotropy increases and the ribbon may break
Solution Approach 1:
Instead of pulling the ribbon tight from the front to ensure contact, the invention applies tension from the rear side through the backing layer, reversing the direction of force application. This allows the ribbon to contact the roller surface without direct front-tension, reducing magnetic anisotropy while maintaining thermal contact consistency.
Solution Approach 2:
The invention introduces a backing layer as an intermediary between the tensioning mechanism and the ribbon. The backing layer transmits tensile force to the ribbon from the rear, enabling indirect tension application that secures thermal contact while minimizing direct mechanical stress on the ribbon's magnetic structure.
2Reliability
If high tension is applied to the ribbon to secure sufficient contact with the roller surface, then thermal contact is improved, but the risk of ribbon breakage increases
Solution Approach 1:
The backing layer serves as a mediator that distributes and transmits tensile force away from the ribbon's vulnerable edges and magnetic structure. By applying tension through the backing layer from the rear, the system achieves consistent thermal contact while the ribbon itself experiences reduced mechanical stress, lowering breakage risk.
Solution Approach 2:
The invention inverts the tensioning approach by applying force from the rear through the backing layer rather than pulling the ribbon forward. This reverse tensioning method secures the ribbon to the roller surface for consistent heating while avoiding the high front-tension forces that cause ribbon breakage.
3Reliability
If the ribbon surface is not flat with undulation, then contact with the roller is insufficient, but applying more tension to fix this increases magnetic anisotropy
Solution Approach 1:
The backing layer acts as a flexible intermediary that can conform to and compensate for surface undulations in the ribbon. By applying tension through the backing layer from the rear, the system achieves uniform contact between the ribbon and roller surface without requiring high front-tension forces that would increase magnetic anisotropy.
Solution Approach 2:
Instead of applying front tension to flatten undulating ribbon surfaces, the invention applies rear tension through the backing layer. This reverse approach allows the ribbon to naturally conform to the roller surface while maintaining contact uniformity, avoiding the magnetic anisotropy caused by direct front-tension on undulating surfaces.
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
This approach enables uniform heat treatment of amorphous alloy ribbons without applying excessive tension, minimizing magnetic anisotropy and ensuring consistent thermal contact, thus expanding the applications of ribbons with reduced anisotropy in magnetic characteristics.
Implementation Method 1
a heat treatment method for an amorphous alloy ribbon including a step of transferring an amorphous alloy ribbon that is brought into contact with a heated projected surface
Implementation Method 2
performing transferring while a part of the amorphous alloy ribbon in contact with the projected surface is pressed against the projected surface from the side opposite to the contact surface
Data Source
AI summary
The present invention provides a heat treatment method and a heat treatment apparatus for an amorphous alloy ribbon, said method and apparatus being capable of uniformly heat treating an amorphous alloy ribbon, while suppressing the occurrence of anisotropy in the magnetic characteristics. A heat treatment method for an amorphous alloy ribbon, said method comprising a step wherein an amorphous alloy ribbon is transferred, while being in contact with a heated projected surface, and the amorphous alloy ribbon is transferred, while having the part that is in contact with the projected surface pressed against the projected surface from a surface which is on the reverse side of the surface that is in contact with the projected surface.