Laminated Core Inner-Diameter Heating for Adhesive Curing
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Solution Overview
Problem
Existing methods for manufacturing laminated cores, such as the embossing lamination method, result in inconsistent concentricity and perpendicularity due to shape deviations in lamina members, leading to quality issues like delamination and iron loss, as the inner diameter surface is not adequately heated during the lamination process.
Innovation Solution
A heat sealing-type rotational laminated core manufacturing apparatus that rotates a squeeze ring by a predetermined pitch while directly heating the inner diameter surface of the core, ensuring consistent adhesion and improved quality through thermal curing of the adhesive.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the squeeze ring is heated to cure adhesive, then the outer diameter side adhesive is sufficiently cured, but the inner diameter side adhesive is not sufficiently cured due to heat conduction limitations
Solution Approach 1:
The heating system is segmented into two independent heating zones: an outer heating unit that heats the squeeze ring for outer diameter adhesive curing, and an inner heating unit that directly heats the inner diameter surface for inner diameter adhesive curing. This segmentation allows each zone to be optimized independently, ensuring both outer and inner adhesives are sufficiently cured without the heat conduction limitations of a single heating approach.
Solution Approach 2:
The inner heating unit acts as an intermediary element that directly contacts or approaches the inner diameter surface of the stacked core, serving as a heat transfer mediator. This intermediary heating mechanism overcomes the heat conduction bottleneck by providing a dedicated heat source at the inner diameter, ensuring adequate adhesive curing in this previously under-heated region.
2Ease of manufacture
If lamina members are stacked repeatedly without rotation, then stacking is simple, but concentricity and perpendicularity deteriorate due to accumulated shape deviations
Solution Approach 1:
The squeeze ring is designed to rotate by a predetermined pitch angle during the stacking process, transforming the static stacking operation into a dynamic one. This rotation compensates for accumulated shape deviations by redistributing the positional errors, thereby maintaining consistent concentricity and perpendicularity of the laminated core while preserving the simplicity of the stacking operation.
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 good concentricity and perpendicularity of the laminated core, preventing delamination and enhancing the magnetic flux density by ensuring a strong adhesive bond across the entire core, including the inner diameter surface.
Implementation Method 1
heating the inner diameter surface of the laminated core
Implementation Method 2
heats a squeeze ring in which lamina members are stacked and thermally cures an adhesive or an adhesive film applied to the lamina members
Data Source
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AI summary
Disclosed is a laminated core manufacturing apparatus capable of heating the inner diameter of a laminated core. The present invention is a laminated core manufacturing apparatus comprising an upper mold (3) and a lower mold (4) and enabling the manufacturing of a laminated core (100) by stacking individual laminar members (101) which are formed by having a strip (100A) which is sequentially transferred on an upper portion of the lower mold (4) undergo a piercing process and a blanking process by means of punches provided to the upper mold (3), wherein the laminated core manufacturing apparatus further comprises: a squeeze ring (201) installed on a lower portion of a blanking die (11) for the blanking process; am elevating block (301) installed on the lower portion of the squeeze ring (201); an elevating means (302) for vertically moving the elevating block (301); and a heating block (304) installed on an upper portion of the elevating block (301) and positioned at an inner diameter surface of the laminated core (100).