Variable-Pitch Induction Coils for Uniform Stabilizer Heating
Solution Overview
Problem
Conventional induction heating devices fail to maintain a uniform temperature along the length of bar-shaped workpieces, such as vehicle stabilizers, leading to inefficient adhesive curing and potential damage from excessive heat, which complicates the attachment of rubber bushes.
Innovation Solution
The induction heating device employs a dual-coil configuration with varying pitch portions, including narrow, medium, and wide pitches, to distribute heat generation density uniformly along the workpiece, ensuring consistent temperature maintenance during the heating process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a conventional induction heating coil with constant pitch is used, then the heating process is simple, but the temperature distribution along the workpiece becomes non-uniform with lower temperatures at the ends
Solution Approach 1:
The induction heating coil is designed with varying pitch along its length, creating different heating zones. The first coil portion has a first pitch, the second coil portion has a second pitch different from the first, and the third coil portion has a third pitch different from both. This local variation in pitch creates non-uniform heat generation density that compensates for heat loss at the ends, achieving uniform temperature distribution along the workpiece.
2Productivity
If the workpiece is heated to high temperature for adhesive curing, then the curing efficiency improves, but the compressive residual stress from shot peening dissipates
Solution Approach 1:
The heating device uses multiple coils with different pitches to create controlled heat generation density distribution. By adjusting the pitch variations, the system achieves uniform temperature distribution that maintains the workpiece temperature within the optimal range for adhesive curing (above curing temperature) while preventing excessive temperature rise that would cause stress dissipation. This feedback-controlled heating approach balances curing efficiency with stress preservation.
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 configuration allows for nearly uniform temperature distribution along the workpiece, preventing overheating and ensuring effective adhesive curing, thereby improving the durability and attachment quality of stabilizers.
Implementation Method 1
heating a to-be-heated part of a bar-shaped workpiece... by means of a high-frequency induction coil
Implementation Method 2
the high-frequency induction heating device... heats the to-be-heated part of a bar-shaped workpiece... to a nearly uniform temperature
Data Source
AI summary
An induction heating device according to one embodiment includes a first coil portion and a second coil portion. A bar-shaped workpiece is placed between the first coil portion and the second coil portion. The first coil portion includes a pair of first narrow pitch portions formed in respective end portions thereof, a first wide pitch portion formed between the first narrow pitch portions, and a first medium pitch portion formed in the center. The second coil portion includes a pair of second narrow pitch portions formed in respective end portions, a second wide pitch portion formed between the second narrow pitch portions, and a second medium pitch portion formed in the center.