Longitudinal Inductor for Hardening Elongated Workpieces
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Solution Overview
Problem
Existing inductors for inductive hardening of elongate metallic workpieces, such as toothed racks, suffer from suboptimal magnetic field generation due to the transverse arrangement of the inductor section, leading to inefficient hardening results.
Innovation Solution
The inductor design features a partial section extending in the longitudinal direction of the workpiece, creating a magnetic field with its axis parallel to the workpiece axis, and can be Z- or S-shaped with magnetic field concentrators to enhance the hardening process, ensuring a uniform current flow and reduced stress.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a transverse inductor section is used to harden the tooth profile, then the inductor can process the workpiece, but the magnetic field generated is not optimal for inductive hardening
Solution Approach 1:
The patent transitions from a transverse inductor section (perpendicular to workpiece axis) to a longitudinal inductor section (parallel to workpiece axis), changing the spatial dimension and orientation of the magnetic field generation to optimize hardening effectiveness
2Device complexity
If the inductor section is arranged transversely to harden the tooth profile, then the inductor structure is simple, but the magnetic field alignment is suboptimal
Solution Approach 1:
The inductor section is reoriented from transverse to longitudinal arrangement, aligning the magnetic field generation with the workpiece axis to achieve optimal magnetic field alignment for hardening the tooth profile
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 design significantly improves the inductive hardening of elongated workpieces by optimizing the magnetic field alignment and distribution, resulting in enhanced hardening results with minimal inductor stress and improved hardening efficiency.
Implementation Method 1
The inductor (1) is looped around the workpiece (2) in the manner of a so-called stirrup inductor... generates a magnetic field whose axis is aligned parallel to the axis of the workpiece (2)
Implementation Method 2
inductor for the inductive hardening of elongate metallic workpieces... inductive hardening of the elongate workpiece
Data Source
Figure 1~3
Figure 4~6
AI summary
The inductor (1) has a sub-section (3) that is extended in the longitudinal direction of the workpiece (2), and is arranged to generate magnetic field with respect to the workpiece. The axis of the sub-section is arranged parallel with respect to the workpiece.