Rotor Core Molding for Precise Magnet Cavity Alignment
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Solution Overview
Problem
The existing rotor core molding systems for electric motors face inefficiencies and quality issues due to the need for careful handling and alignment of unmolded rotor cores on supporting plates and pins, which limits processing efficiency and integrity during the molding of magnets.
Innovation Solution
A rotor core manufacturing method and system that uses a pressure molding system with first and second molds configured to clamp and mold an unmolded rotor core, allowing for precise positioning of a shaft and end caps, and filling magnet cavities with a fluid molding material to cure and fix permanent magnets within the rotor core, ensuring alignment and integrity without direct contact that could exert force on the shaft.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the unmolded rotor core is provided on a supporting plate with a pin for alignment, then the alignment of lamellae and magnet cavities is maintained, but the handling complexity and risk of damage increase due to careful attention required during providing and removing operations
Solution Approach 1:
The invention removes the supporting plate and pin from the system entirely. Instead of using external alignment aids, the rotor core body itself is designed with features (such as定位 structures or self-aligning geometries) that enable direct placement and alignment on the mold, eliminating the need for separate supporting components and reducing handling complexity.
Solution Approach 2:
The rotor core body is designed to be self-aligning through its own structural features. The core body includes built-in positioning elements or geometric characteristics that automatically align it with the mold cavities during placement, without requiring external pins or supporting plates to maintain alignment.
2Reliability
If the unmolded rotor core is carefully handled during providing and removing operations, then the integrity of the rotor core is maintained, but the processing efficiency decreases due to the time-consuming nature of these operations
Solution Approach 1:
The rotor core body is pre-designed with integrated positioning features and structural characteristics that ensure proper alignment and stable placement directly on the mold without requiring subsequent adjustment or careful manual handling. This preliminary design ensures integrity is maintained while reducing handling time.
3Manufacturing precision
If the shaft is received in the mold without contact during clamping, then the positioning precision of the shaft is improved, but the device complexity increases due to recesses or openings in the mold structure
Solution Approach 1:
The recesses or openings for receiving the shaft are integrated into the existing mold structure, combining the shaft reception function with the clamping mechanism. This merging approach allows the shaft to be positioned precisely without contact during clamping while avoiding the need for separate, additional components, thus reducing overall device complexity.
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 method enhances processing efficiency and quality by maintaining the integrity of the rotor core and ensuring precise positioning of the shaft and magnets, resulting in a high-performing and stable electric motor with improved throughput and reliability.
Implementation Method 1
A rotor core pressure molding system for molding permanent magnets in an unmolded rotor core... to provide a molded rotor core
Implementation Method 2
a molded rotor core comprises the rotor core body having the permanent magnets fixed in the magnet cavities by a cured molding material in the magnet cavities
Data Source
AI summary
A rotor core manufacturing method and system allow for molding permanent magnets in an unmolded rotor core to provide an electric motor molded rotor core. The unmolded rotor core includes a shaft and rotor core body having a central through-hole along a longitudinal axis, magnet cavities around the axis with magnets therein. The shaft lies in the central through-hole and projects therefrom, and the molded rotor core includes the rotor core body having the magnets fixed in the cavities. The method includes inserting an unmolded rotor core between the first and second molds of a rotor core molding system; moving the molds together to clamp the rotor core body of the unmolded rotor core with a predetermined pressure; providing a molding material into the magnet cavities; letting the molding material cure within the magnet cavities to a molded rotor core; opening the molds and removing the molded rotor core.