Sintered Cylindrical Magnet Rotor for Stronger High-Speed Armoring
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Solution Overview
Problem
The existing method of shrink-fitting an armoring ring to a permanent magnet to a rotor armoring ring to a rotor armoring rotor armoring rotor arm to a rotor arm to a rotor of a rotor arm to a rotor of a motor, which requires precise surface roughness adjustments and tolerance control, decreases the productivity of the motor rotor and the electric motor and turbocharger.
Innovation Solution
Integrally sintering a cylindrical magnet and armoring ring by forming a composite molded body with metal powder molded bodies of different materials, allowing for diffusion bonding without the need for precise surface roughness adjustments and tolerance control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the armoring ring is shrink-fitted to the outer circumference of the permanent magnet, then the joint strength between the magnet and armoring ring is improved, but the manufacturing complexity and time consumption increase due to the need for precise surface roughness adjustments and tolerance control
Solution Approach 1:
The magnet and armoring ring are merged into a single integrated component through integral sintering, eliminating the need for separate shrink-fitting operations. This combining of previously separate parts into one sintered structure directly resolves the contradiction by removing the complex surface preparation and tolerance control steps while maintaining the strong joint through diffusion bonding at the interface.
Solution Approach 2:
The invention changes the manufacturing parameters from precision mechanical dimensions (surface roughness, tight tolerances) to sintering parameters (temperature, pressure, time). By transforming the joining process from mechanical shrink-fitting to thermal diffusion bonding, the need for precise dimensional control is eliminated while still achieving strong joint strength through controlled sintering conditions.
2Strength
If the armoring ring is shrink-fitted to the outer circumference of the permanent magnet, then the joint strength between the magnet and armoring ring is improved, but the manufacturing process complexity increases due to multiple processing steps
Solution Approach 1:
The magnet and armoring ring are merged into a single integrated component through integral sintering, eliminating the need for separate shrink-fitting operations. This combining of previously separate parts into one sintered structure directly resolves the contradiction by removing the complex surface preparation and tolerance control steps while maintaining the strong joint through diffusion bonding at the interface.
Solution Approach 2:
The invention changes the manufacturing parameters from precision mechanical dimensions (surface roughness, tight tolerances) to sintering parameters (temperature, pressure, time). By transforming the joining process from mechanical shrink-fitting to thermal diffusion bonding, the need for precise dimensional control is eliminated while still achieving strong joint strength through controlled sintering conditions.
3Strength
If the armoring ring is shrink-fitted to the outer circumference of the permanent magnet, then the joint strength between the magnet and armoring ring is improved, but the production time increases due to polishing and tolerance control requirements
Solution Approach 1:
The magnet and armoring ring are merged into a single integrated component through integral sintering, eliminating the need for separate shrink-fitting operations. This combining of previously separate parts into one sintered structure directly resolves the contradiction by removing the complex surface preparation and tolerance control steps while maintaining the strong joint through diffusion bonding at the interface.
Solution Approach 2:
The invention changes the manufacturing parameters from precision mechanical dimensions (surface roughness, tight tolerances) to sintering parameters (temperature, pressure, time). By transforming the joining process from mechanical shrink-fitting to thermal diffusion bonding, the need for precise dimensional control is eliminated while still achieving strong joint strength through controlled sintering conditions.
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
Improves the productivity of the motor rotor, electric motor, and turbocharger by ensuring a strong joint between the magnet and armoring ring, enabling efficient torque transmission during high-speed rotation.
Implementation Method 1
The magnet and the armoring ring are integrally sintered
Implementation Method 2
allowing for diffusion bonding without the need for precise surface roughness adjustments and tolerance control
Data Source
AI summary
A motor rotor includes a cylindrical permanent magnet located around a rotary shaft, and a cylindrical armoring ring located around the permanent magnet. The permanent magnet and the armoring ring are integrally sintered.