Electrolytic Deburring of Sealed Metal Laminate Structures
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Solution Overview
Problem
Conventional deburring processes for metal laminate structures in electrical generators often damage the mill coating layers, leading to insulation failures and the need for recoating, which is inefficient and costly.
Innovation Solution
A sealed metal laminate structure is created with enamel layers on the mill coating layers, except at exposed metal protrusions, and a phosphate sealer is deposited on these protrusions to prevent damage and maintain insulation, using a system with electrolyte baths of opposite polarity to remove burrs without sanding or grinding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional deburring processes (sanding and grinding) are used to remove burrs, then burr removal is achieved, but the mill coating layers are damaged or removed
Solution Approach 1:
The patent replaces mechanical deburring processes (sanding and grinding) with an electrolytic deburring process. The electrolytic system uses electrical current and electrolyte solution to chemically remove burrs through electrochemical reactions, eliminating the mechanical contact that causes coating damage while achieving effective burr removal.
Solution Approach 2:
The patent changes the fundamental parameter of the deburring process from mechanical force to electrochemical reaction. By controlling electrical parameters (current density, voltage, electrolyte composition), the process selectively removes metal at burr locations without mechanically contacting or damaging the mill coating layers.
2Productivity
If conventional deburring processes are used, then burrs are removed, but recoating is required due to coating damage
Solution Approach 1:
By substituting mechanical deburring with electrolytic deburring, the process eliminates coating damage that would necessitate recoating operations. This integration of burr removal and coating preservation into a single process step eliminates the separate recoating工序, thereby reducing total manufacturing time and improving productivity.
3Manufacturing precision
If the metal sheet and mill coating are especially thin, then manufacturing precision is improved, but the risk of damage from deburring increases
Solution Approach 1:
The electrolytic deburring process replaces mechanical contact with electrochemical action, allowing precise control of material removal through electrical parameters. This enables safe processing of thin laminations with delicate mill coatings, as the electrochemical reaction can be tuned to remove only burrs without affecting the thin coating layers.
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 solution prevents damage to mill coating layers, maintains uniform thickness, reduces burr formation, and eliminates the need for recoating, enhancing the quality and efficiency of the manufacturing process.
Implementation Method 1
using a system with electrolyte baths of opposite polarity to remove burrs
Implementation Method 2
a phosphate sealer is deposited on these protrusions
Data Source
AI summary
The present disclosure generally relates to a sealed metal laminate structure comprising: a metal layer having a first surface and an opposite second surface; a first enamel layer laminated on the first surface of the metal layer, except at an exposed metal protrusion at a perimeter edge of the sealed metal laminate structure; a second enamel layer laminated on the second surface of the metal layer, except at the exposed metal protrusion at the perimeter edge of the sealed laminate structure; and a phosphate sealer deposited on the exposed metal protrusion of the sealed metal laminate structure. The present disclosure also relates to a metal laminate structure without a phosphate sealer. In addition, systems and methods for treating workpieces, including metal laminate structures, are discussed.