Laminated Core Fabrication With Timed Adhesive Application
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Solution Overview
Problem
Existing apparatuses for fabricating laminated cores face challenges in ensuring uniform adhesive application due to the narrow distance between the strip metal sheet and the adhesive discharge holes, which can lead to reduced adhesion between iron core elements and decreased rigidity of the laminated core.
Innovation Solution
The apparatus includes a controller that coordinates the movement of a stripper plate and an adhesive applicator. The adhesive is applied onto the lower surface of the metal sheet when the stripper plate is not at its lowest descending position, allowing for a wider distance between the metal sheet and the adhesive applicator, ensuring that the adhesive covers a broader area of the metal sheet.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the adhesive applicator is positioned close to the strip metal sheet for adhesive application, then the adhesive application position precision is improved, but the adhesive application range is limited and adhesion strength deteriorates
Solution Approach 1:
The adhesive is applied to the strip metal sheet in advance before the punching operation. The adhesive applicator applies adhesive to the lower surface of the strip metal sheet at a position corresponding to where iron core elements will be stacked, allowing the adhesive to be distributed over a wider area before the punching process begins.
Solution Approach 2:
The invention changes the spatial relationship between the adhesive applicator and the strip metal sheet by utilizing the vertical dimension. The adhesive applicator is positioned in the lower mold while the strip metal sheet is held by the stripper plate in the upper mold, creating a larger vertical distance that allows for broader adhesive application range without compromising positioning precision.
2Reliability
If the stripper plate is positioned at the lowest descending position during adhesive application, then the strip metal sheet is securely held, but the distance between the metal sheet and adhesive applicator is too narrow for wide adhesive coverage
Solution Approach 1:
The adhesive application is performed as a preliminary action before the stripper plate reaches its lowest descending position. The controller is configured to operate the adhesive applicator during the movement phase when the stripper plate is descending but not yet at the lowest position, allowing adhesive to be applied over a wider area.
Solution Approach 2:
The invention utilizes the dynamic movement of the stripper plate during descent to create optimal conditions for adhesive application. By timing the adhesive application to occur during the movement phase rather than at the static lowest position, the system dynamically adjusts the spatial relationship between components to achieve both holding stability and wide adhesive coverage.
3Manufacturing precision
If the distance between the strip metal sheet and discharge holes is strictly managed, then adhesive application precision is improved, but the adhesive application range is limited
Solution Approach 1:
The invention replaces the traditional mechanical contact-based adhesive transfer system with a spray-based adhesive application system. Instead of relying on the strip metal sheet contacting discharge holes at a precisely controlled narrow distance, the adhesive applicator sprays adhesive onto the lower surface of the strip metal sheet, eliminating the need for strict distance management while achieving wide coverage.
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 approach ensures secure bonding between the iron core elements, resulting in a laminated core with high rigidity and improved adhesion due to the uniform application of adhesive over a wider surface area.
Implementation Method 1
an adhesive applicator included in the lower mold and operable to apply an adhesive onto a lower surface of the metal sheet
Implementation Method 2
a stripper plate included in the upper mold and movable downward to a lowest descending position that is a lowermost position, the stripper plate being operable to restrict upward and downward movements of a metal sheet during punching
Implementation Method 3
an outer mold including a punch corresponding to the die hole, the stripper plate being operable to restrict upward and downward movements of a metal sheet during punching out of the metal sheet by the punch
Implementation Method 4
a plurality of iron core elements are laminated and bonded to each other... secure bonding between the iron core elements, resulting in a laminated core with high rigidity and improved adhesion
Data Source
AI summary
An apparatus for fabricating a laminated core includes a lower mold including a die including a die hole, an upper mold including a punch, a stripper plate operable to restrict upward and downward movements of a metal sheet at a lowest descending position during punching out of the metal sheet by the punch, an adhesive applicator included in the lower mold and operable to apply an adhesive onto a lower surface of the metal sheet, and a controller configured or programmed to control the stripper plate and the adhesive applicator. The controller is configured or programmed to include a movement controller to control upward and downward movements of the stripper plate, and an applicator controller to cause the adhesive applicator to apply the adhesive onto the lower surface of the metal sheet while the stripper plate is not located at the lowest descending position.