Magnet Fragment Alignment via Preliminary Pressing
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Solution Overview
Problem
The existing methods for manufacturing field pole magnet bodies in rotating electric machines face instability in the adhesive force between cleaved magnet fragments due to excessive pressing forces, leading to insufficient transmission of pressing force and unstable bonding.
Innovation Solution
A manufacturing device that includes a reference jig with lengthwise, thickness, and width direction reference surfaces, and pressing means to align and press the magnet fragments from these directions, using a combination of spring and air pressure to ensure stable adhesion by reducing frictional resistance and maintaining consistent pressing force.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If strong pressing forces are applied from thickness and width directions to align magnet fragments, then alignment precision is improved, but friction increases and prevents sufficient transmission of pressing force from lengthwise direction
Solution Approach 1:
The patent applies preliminary pressing forces from the thickness and width directions before applying the lengthwise pressing force. This preliminary action pre-aligns the magnet fragments and reduces frictional resistance, enabling the subsequent lengthwise pressing force to be effectively transmitted for stable adhesion without being blocked by excessive friction.
2Strength
If pressing forces are increased to ensure adhesion, then bonding strength is improved, but friction between magnet fragments and jig increases reducing pressing force transmission
Solution Approach 1:
The patent applies preliminary pressing forces from the thickness and width directions before applying the lengthwise pressing force. This preliminary action pre-aligns the magnet fragments and reduces frictional resistance, enabling the subsequent lengthwise pressing force to be effectively transmitted for stable adhesion without being blocked by excessive friction.
3Manufacturing precision
If magnet fragments are pressed strongly from multiple directions, then alignment and adhesion are improved, but friction increases preventing sufficient pressing force transmission
Solution Approach 1:
The patent applies preliminary pressing forces from the thickness and width directions before applying the lengthwise pressing force. This preliminary action pre-aligns the magnet fragments and reduces frictional resistance, enabling the subsequent lengthwise pressing force to be effectively transmitted for stable adhesion without being blocked by excessive friction.
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 stabilizes the adhesive force between magnet fragments, ensuring uniform bonding and preventing deviations, which improves the assembly yield and motor output by maintaining consistent adhesive force during the integration process.
Implementation Method 1
the friction between the magnet fragments and the jig as well as the pressing means increases and thus the pressing force from the lengthwise direction cannot be sufficiently transmitted to the magnet fragments
Data Source
AI summary
A device for manufacturing a field pole magnet body includes a reference jig having reference surfaces in a lengthwise direction, a width direction, and a thickness direction for positioning the plurality of cleaved and divided magnet fragments; a lengthwise direction pressing means that presses the magnet fragments from the lengthwise direction to the lengthwise direction reference surface; a width direction pressing means that presses them from the width direction to the width direction reference surface; and a thickness pressing means that presses them from the thickness direction to the thickness direction reference surface. The lengthwise direction pressing means is operated to press the magnet fragments in a state in which a pressing force of at least one of the width direction pressing means and the thickness direction pressing means is suppressed to be weaker than a pressing force generated by the lengthwise direction pressing means or is released.