Electromagnetic Actuator for Non-Contact Metal Pattern Forming
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Solution Overview
Problem
Existing methods for forming patterns on three-dimensional metal shells using electromagnetic forming processes are limited by the inability to generate directional magnetic fields, resulting in low texture quality and residual stress, and current methods like laser engraving or heat transfer printing produce patterns on plastic materials with inferior characteristics.
Innovation Solution
A pattern-producing device comprising a die with a patterned surface and an electromagnetic actuator that generates a repulsive force when supplied with a current pulse, allowing the work piece to deform and replicate the pattern without contact, minimizing residual stress and achieving high malleability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If electromagnetic forming process is used with single directional magnetic field, then forming capability is achieved, but pattern formation on sidewalls of three dimensional metal shell is not possible
Solution Approach 1:
The electromagnetic actuator is divided into multiple independent coil assemblies, each capable of generating magnetic fields in different directions. This segmentation allows the system to form patterns on complex three-dimensional surfaces including sidewalls, while maintaining the benefits of electromagnetic forming without requiring a completely complex new system architecture.
2Manufacturing precision
If laser engraving or heat transfer printing is used, then pattern formation is achieved, but texture quality is low
Solution Approach 1:
The invention replaces traditional mechanical or thermal methods (laser engraving, heat transfer printing) with electromagnetic forming. The electromagnetic actuator generates a magnetic field that induces eddy currents in the conductive workpiece, creating a repulsive force that deforms the material to form the pattern. This non-contact method achieves superior texture quality while avoiding the complexity and limitations of mechanical contact processes.
3Manufacturing precision
If pressing process is used to apply metal plate to metal casing, then pattern transfer is achieved, but residual stress is produced
Solution Approach 1:
The invention replaces the mechanical pressing process with electromagnetic forming. Instead of applying mechanical force through a press that creates residual stress, the electromagnetic actuator generates a magnetic field that induces eddy currents in the workpiece. The resulting electromagnetic repulsive force deforms the material to form the pattern without mechanical contact, thereby eliminating residual stress while maintaining high pattern transfer quality.
4Object-affected harmful factors
If non-contact electromagnetic forming is used, then residual stress is minimized, but directional control of magnetic field is limited
Solution Approach 1:
The electromagnetic actuator is segmented into multiple independent coil assemblies, each capable of generating magnetic fields in specific directions. By controlling the current in each coil assembly independently, the system maintains the non-contact advantage of electromagnetic forming (minimizing residual stress) while achieving precise directional control of the magnetic field to form patterns on various surfaces including sidewalls.
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 device efficiently produces fine patterns on metal surfaces with reduced residual stress and improved texture quality by using a non-contact, high-velocity quasi-hydrostatic shaping force, suitable for various materials including metals and alloys.
Implementation Method 1
When the electromagnetic actuator is supplied with a current pulse, a repulsive force is generated between the electromagnetic actuator and the work piece
Data Source
AI summary
A device for producing a pattern onto a work piece includes a die, an electromagnetic actuator and a base. The die includes a patterned surface, and the patterned surface includes a pattern. The electromagnetic actuator includes an plate body, a convex part and a strip unit connected to the plate body. The electromagnetic actuator is disposed in the base. When the electromagnetic actuator is activated while a work piece is being positioned between the patterned surface and the electromagnetic actuator, an inductive current is generated on the work piece by the electromagnetic actuator, and then a repulsive force is generated between the electromagnetic actuator and the work piece. The repulsive force causes the work piece to adhere to the patterned surface, forcing the work piece to deform against the patterned surface and to take on the shape of the pattern.