Extruded Plate Permanent Magnet Strain Ratio Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional methods for producing plate-shaped permanent magnets by extrusion struggle to achieve high magnetic properties while maintaining productivity, material yield, and cost-effectiveness, with existing techniques like upsetting, extrusion, and rolling each having their own limitations.
Innovation Solution
A process involving the extrusion of a preform to form a plate-shaped permanent magnet, where the cross-sectional dimension is reduced in the X-direction and enlarged in the Y-direction, achieving a strain ratio of 0.2 to 3.5, which results in magnetic properties comparable to or exceeding those of magnets produced by upsetting, and optimizing the extrusion die design to control strain ratios for improved magnetic anisotropy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If upsetting method is used to produce permanent magnets, then magnetic properties are improved, but productivity deteriorates
Solution Approach 1:
The invention changes the extrusion parameters by controlling the strain ratio (ε2/ε1) within a specific range of 0.2 to 3.5, which transforms the extrusion process from a low magnetic property method into one that achieves high magnetic properties comparable to upsetting, while maintaining extrusion's productivity advantages
2Productivity
If extrusion method is used to produce permanent magnets, then productivity is improved, but magnetic properties deteriorate
Solution Approach 1:
The invention changes the extrusion parameters by controlling the strain ratio (ε2/ε1) within a specific range of 0.2 to 3.5, which transforms the extrusion process from a low magnetic property method into one that achieves high magnetic properties comparable to upsetting, while maintaining extrusion's productivity advantages
3Productivity
If rolling method is used to produce permanent magnets, then productivity is improved, but material yield deteriorates
Solution Approach 1:
The invention changes the extrusion parameters by controlling the strain ratio (ε2/ε1) within a specific range of 0.2 to 3.5, which transforms the extrusion process from a low magnetic property method into one that achieves high magnetic properties comparable to upsetting, while maintaining extrusion's productivity advantages
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 process effectively produces permanent magnets with high magnetic properties, improved productivity, material yield, and reduced manufacturing costs, with the strain ratio of 0.4 to 1.6 further enhancing magnetic properties, particularly in terms of residual magnetic flux density, intrinsic coercive force, and maximum energy product.
Implementation Method 1
a dimension of a cross section of the preform is reduced in an X-direction and enlarged in a Y-direction perpendicular to the X-direction
Data Source
AI summary
The present invention relates to a process of producing a permanent magnet, which includes extruding a preform to form a plate-shaped permanent magnet, in which the preform is extruded in such a way that a dimension of a cross section of the preform is reduced in an X-direction and enlarged in a Y-direction perpendicular to the X-direction. The present invention also relates to a plate-shaped permanent magnet formed by extruding a preform, in which the preform is extruded in such a way that a dimension of a cross section of the preform is reduced in an X-direction and enlarged in a Y-direction perpendicular to the X-direction, whereby the permanent magnet has a strain ratio ε2/ε1 with respect to the preform in a range of 0.2 to 3.5, in which ε1 is a strain in the direction of the extrusion of the preform and ε2 is a strain in the Y-direction.