本帖最后由 龟山淬火 于 2016-8-1 16:27 编辑
Simulation of Induction Heating for estimation of product quality after heat treatment- offer simulation of high frequency induction heating to help estimate product quality after heat treatment.
- ・The simulation is available using FEM (Finite Element Method)-based coupled analysis of magnetic field and heat conduction with the magnetic field analysis software.
- ・ Estimation of heating temperature profile is attained by creating the work and coil models with 3D CAD or other proper tools and freely selecting various parameters for heating conditions such as frequency, heating power and heating time.
- ・For three-dimensional (3D) analysis problems, calculated solutions may be obtained by giving rotational motion to the heat generated in the work or work ins.
＜Example Analysis＞
Analysis of hub inner shaft based on 3D model
| Heating coil used for verification | Work (Image) |
| |
| Analysis Conditions | FEM model | Total number of elements:
675,571 (Electromagnetic field)
461,114 (Thermal field)
Coil electric current: 3,666～3,750A
(Based on measurement values)
Heating time: 5.7sec
Frequency: 30kHz | |
Schematic representation of changing temperature distributions over the work with heating time is shown below. It helps estimate the heating time until the heat reaches the intended depth of quench-hardened case.
Analysis of internal quenching of the hub outer ring
Coil and work (image)
| Frequency: 30kHz
Heating time: 4.0sec |
Changing temperature distributions across the workpiece cross section with heating time is shown below. | | Temperatures at the corners are found rising first followed by increasing temperatures in the major diameter sections. |
Distortion analysis in the R quenching of a crankshaft
By expanding the heat dissipation data from the 2D magnetic field analysis to 3D, tendency of distortions in the crankshaft with multiple positions to be quenched may be anticipated.
Distortion analysis for a 4-cylinder crankshaft is shown below. Five (5) journals and 4 pins will be hardened.
Estimated distortion profile at the end of quenching is shown below (distortion level scaled up 100 times). The third journal is found distorted convex downwards.
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发表于 2016-8-1 16:16:42
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发表于 2016-8-1 18:30:58
发表于 2016-8-2 07:51:11
