Motor Core Crimping Die with Protrusions for Gap Reduction
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Solution Overview
Problem
Conventional crimping devices for motor cores become larger due to the need for increased load distribution to reduce gaps between iron core pieces, which is inefficient and limits their compactness.
Innovation Solution
A crimping device with a fixed die and a movable die, where the movable die has protrusions that apply a concentrated load to the crimp portions of the laminate, allowing for effective crimping of dowels without the need for a large upper plate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If the upper plate makes surface contact across the entire surface of the laminate, then the load is distributed, but the crimping device becomes larger
Solution Approach 1:
The upper plate is segmented into multiple protrusions that contact specific crimp portions of the laminate. Instead of a continuous surface, the load is applied through discrete protrusion elements concentrated at the dowel locations, reducing the overall plate area while maintaining effective load transmission to the crimp portions
Solution Approach 2:
The upper plate transitions from uniform surface contact to localized contact points. The protrusions concentrate the load precisely where needed at the crimp portions, creating local high-pressure zones that effectively crimp the dowels without requiring broad surface contact across the entire laminate
2Manufacturing precision
If the load is applied to reduce gaps between iron core pieces, then the gaps are reduced, but the crimping device becomes larger
Solution Approach 1:
The loading mechanism is segmented into discrete protrusions positioned at each crimp portion location. This segmentation allows the device to apply concentrated loads at specific points rather than requiring a large distributed plate, achieving gap reduction through focused force application
Solution Approach 2:
The solution transitions from a two-dimensional surface contact approach to a three-dimensional protrusion structure. The protrusions extend downward from the upper plate surface, concentrating the load in the thickness direction where the gaps need to be reduced, rather than spreading the load across a large surface area
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 crimping device achieves sufficient surface pressure for crimping while maintaining a compact size, reducing the load applied to the movable die and preventing the device from becoming excessively large.
Implementation Method 1
The movable die is configured to apply a load to the laminate by coming into contact with a second end face of the laminate. Protrusions are provided on a surface of the movable die facing the second end face in the thickness direction. The protrusions respectively protrude toward the crimp portions of the laminate.
Data Source
AI summary
A crimping device for a motor core is configured to crimp dowels of adjacent ones of iron core pieces by applying a load to a laminate in a thickness direction. The crimping device for the motor core includes a fixed die configured to come into contact with a first end face of the laminate and a movable die that is movable toward and away from the fixed die. The movable die is configured to apply a load to the laminate by coming into contact with a second end face of the laminate. Protrusions are provided on a surface of the movable die facing the second end face in the thickness direction. The protrusions respectively protrude toward crimp portions of the laminate.