Overview
Closeup |
The high-frequency quenching method uses induction heating to harden the
surface of objects.
The temperature of the gear at the time of quenching affects the hardness
of the gear.
The surface temperature distribution varies with the coil geometry.
In JMAG, the eddy current loss density distribution obtained by magnetic
field analysis can be used as a heat source for thermal analysis.
This note presents the use of coupled magnetic field analysis and thermal
analysis to obtain the temperature distribution of the gear and the current
density distribution of the coil. |
Eddy Current Loss Density Distribution
Closeup |
Figure 1 shows the eddy current loss density distribution of the surface
of the gear and the cross-section of the tooth top. Each cross-section
shown in the figure is the XY-plane at the half position of the face width.
Magnetic field generated by the coil produces eddy currents in the gear,
and eddy currents are distributed on the surface of the gear due to the
skin effect.
In addition, eddy current loss density distribution produced on the surface
of the gear varies with the coil geometry. |
Temperature Distribution/Temperature Variation
Figure 2 shows the temperature distribution of the gear. Figure 3 shows
the temperature variation of the tooth top at each measuring points shown
in Figure 2.The tooth top is heated by eddy currents as shown in the temperature
distribution. Since the geometry is different between model A and model
B, heat generation is also different between model A and model B.
When the temperature exceeds the Curie point, 770 degrees Celsius, the
temperature rises differently for both model A and model B. |
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