Rotor Core Guide Plate for Precise Core Rod Alignment
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Solution Overview
Problem
Conventional rotor core manufacturing devices face difficulties in precisely fitting the columnar core rod into the center hole of the laminated iron core, leading to potential manufacturing defects due to the core rod abutting against the laminated iron core.
Innovation Solution
Incorporation of a guide plate with a through hole that aligns with the center hole, featuring a smaller opening diameter on one side matching the core rod and a larger opening diameter on the other side, which guides the core rod into the center hole securely, ensuring accurate alignment and fitting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a columnar core rod is used to fit into the center hole of the laminated iron core, then the core rod can be inserted to hold and position the rotor core, but the core rod may abut against the laminated iron core causing manufacturing defects due to difficulty in precise fitting
Solution Approach 1:
A guide plate is introduced as an intermediary component between the core rod and the laminated iron core. The guide plate has a through-hole that receives the core rod and guides it into the center hole of the laminated iron core, preventing direct contact and potential damage between the core rod and the iron core while ensuring precise alignment and fitting.
2Manufacturing precision
If the opening diameter of the through hole on both sides of the guide plate is made the same as the center hole diameter, then the core rod alignment is precise, but the core rod cannot be easily inserted
Solution Approach 1:
The guide plate features different opening diameters at different locations: the first opening (on the insertion side) has a diameter larger than the center hole to facilitate easy insertion of the core rod, while the second opening (on the output side) has a diameter equal to the center hole diameter to ensure precise alignment and fitting of the core rod into the laminated iron core.
3Manufacturing precision
If the core rod is made to fit precisely into the center hole, then manufacturing quality improves, but the fitting process becomes difficult and time-consuming
Solution Approach 1:
The guide plate is prepared in advance with a through-hole that has a larger opening diameter on the insertion side, allowing the core rod to be easily inserted before final positioning. This preliminary ease of insertion is followed by automatic alignment through the guide plate's geometry, achieving both high precision and efficiency without requiring complex adjustment procedures.
Data Source
AI summary
Provided is a manufacturing device for a rotor core and a manufacturing method for a rotor core in which it is possible to suitably fit a columnar core rod into a center hole of a laminated iron core, when fitting and installing the laminated iron core into a fitting recess of a first mold. A device for manufacturing a rotor core includes: a first mold; a second mold that engages with the first mold and clamps and seals the laminated iron core together with the first mold; a resin injection unit that is provided to the second mold and injects a resin material in the magnet insertion hole by using a molding machine; and a guide plate that has a through hole into which the core rod is inserted and is mounted at one end of the laminated iron core in such a manner that the through hole is in communication with the center hole of the laminated iron core, in which the guide plate has an opening diameter of the through hole on one surface side of one end side of the laminated iron core that is substantially the same as an opening diameter of the center hole, and an opening diameter of the through hole on the other side on the side of the first mold is larger than an opening diameter on the one surface side.