Rotating Magnetic Tool for Flexible Induction Hardening
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Solution Overview
Problem
Conventional magnetic induction hardening processes require dedicated tooling for each part, leading to high costs and inflexibility, as well as high electricity consumption due to the specific geometry and frequency requirements of inductors and power supplies.
Innovation Solution
A magnetic induction hardening apparatus with a magnetic tool having a non-magnetic body and a magnetic arrangement of alternating polarity permanent magnets, coupled with a drive arrangement for rotating the tool relative to the workpiece, allowing for adjustable frequency and geometry to achieve hardening across various parts without the need for dedicated tooling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional induction heating systems use dedicated inductors with specific geometry and frequency for each part, then hardening precision is improved, but device complexity and cost increase
Solution Approach 1:
The patent applies universality by designing a single magnetic tool with adjustable parameters that can harden multiple different workpiece geometries. Instead of requiring dedicated inductors for each part type, the magnetic tool can be configured with different numbers of magnetic poles and operating at different rotational speeds to accommodate various workpiece shapes and hardening requirements, thereby reducing device complexity while maintaining hardening precision.
Solution Approach 2:
The patent applies dynamics by making the magnetic tool rotatable with adjustable rotational speed and configurable magnetic pole arrangements. This dynamic capability allows the system to adapt to different workpiece geometries and hardening requirements without requiring multiple static inductors, thus reducing device complexity while preserving manufacturing precision through parameter adjustment.
2Manufacturing precision
If conventional induction heating systems use part-dedicated tooling, then hardening quality is improved, but adaptability decreases
Solution Approach 1:
The magnetic tool is designed as a universal device that can harden various workpiece types by adjusting the number of magnetic poles and rotational speed. This multi-functionality enables the same tool to adapt to different part geometries and hardening requirements, thereby improving adaptability while maintaining hardening quality through parameter optimization.
Solution Approach 2:
The patent applies parameter changes by allowing adjustment of the magnetic tool's rotational speed and magnetic pole configuration to match different workpiece requirements. These parameter changes enable the system to adapt to various part geometries and hardening specifications without sacrificing hardening quality, thus improving adaptability while preserving manufacturing precision.
3Reliability
If conventional induction heating systems use high power supplies for each dedicated inductor, then hardening effectiveness is improved, but energy consumption increases
Solution Approach 1:
The magnetic tool serves as a universal heating device that can process multiple workpiece types with a single power supply system. By adjusting the rotational speed and magnetic pole configuration rather than requiring multiple dedicated high-power inductors, the system maintains hardening effectiveness across different parts while reducing overall energy consumption through shared power resources.
Solution Approach 2:
The patent applies merging by consolidating multiple dedicated inductor functions into a single magnetic tool that can be reconfigured for different applications. This consolidation allows one power supply system to serve multiple hardening needs, maintaining hardening effectiveness through parameter adjustment while reducing total electricity consumption by eliminating redundant high-power supplies.
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 solution enables flexible and cost-effective hardening of different components by adjusting the number of magnetic poles and rotational speed, reducing electricity consumption and eliminating the need for part-specific tooling, while maintaining effective hardening results.
Implementation Method 1
A drive arrangement for rotating the magnetic tool relative to the workpiece holder about an axis of rotation is provided to induce heating of the workpiece
Implementation Method 2
The magnetic arrangement may define a number of magnetic poles (nP), the drive arrangement rotates the tool relative to the workpiece holder at a speed (RPM), and a frequency of at least 5kHz is achieved according to the equation Hz = (nP × RPM)/120
Data Source
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AI summary
An apparatus for magnetic induction hardening of a workpiece includes a magnetic tool having a body portion formed of a generally non-magnetic material. The body portion has a surface configured to be positioned in close proximity to the workpiece being hardened. The apparatus further includes a magnetic arrangement coupled to the body portion at or adjacent the surface of the body portion and configured to provide regions of alternating polarity. A workpiece holder is configured to support the workpiece in close proximity to the surface of the magnetic tool. A drive arrangement for rotating the magnetic tool relative to the workpiece holder about an axis of rotation is provided to induce heating of the workpiece to achieve a temperature in the austenitic range of the workpiece resulting in hardening of the workpiece through a microstructural transformation.