Stabilizer Bar Rubber Bush Adhesion via Induction Heating
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Solution Overview
Problem
Conventional methods for manufacturing rubber bush stabilizer bars face issues with poor appearance and reduced working efficiency due to high heat requirements for vulcanizing adhesion, leading to inconsistent adhesion accuracy and potential damage to the coated surface.
Innovation Solution
A method involving high-frequency induction heating of the stabilizer bar's center portion to a controlled temperature between 160°C and 280°C, followed by precise fitting and adhering of the rubber bush with vulcanizing adhesive, allowing for stable adhesion without overheating and maintaining efficient processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the stabilizer bar is heated to greater than or equal to 180°C for vulcanizing adhesion, then adhesion strength is improved, but poor appearance such as clouding or coating damage occurs
Solution Approach 1:
The patent applies preliminary action by heating the stabilizer bar before fitting the rubber bush. The stabilizer bar is heated to 180-280°C in advance, and then the pre-heated bar is inserted into the rubber bush which has already been coated with vulcanizing adhesive. This sequence ensures that the adhesive is applied to a stable, non-hot surface, preventing coating damage while still achieving strong adhesion through the subsequent vulcanizing reaction during clamping.
2Manufacturing precision
If the stabilizer bar is heated at high temperature (360°C or higher) or for long period to achieve vulcanizing reaction, then adhesion accuracy is improved, but working efficiency is lowered and production becomes uneconomic
Solution Approach 1:
The patent changes the temperature parameter from the conventional 360°C or higher to a lower range of 180-280°C. This parameter change is achieved by heating the stabilizer bar to this specific temperature range before insertion, and then utilizing the heat generated during the clamping process itself to complete the vulcanizing reaction. This reduces both the peak temperature required and the heating time, thereby improving working efficiency while maintaining adhesion accuracy.
Solution Approach 2:
The patent applies self-service by utilizing the heat generated during the clamping process to complete the vulcanizing reaction. When the heated stabilizer bar is inserted into the rubber bush and clamped, the friction and compression generate additional heat that facilitates the vulcanizing reaction of the adhesive without requiring external heating during the adhesion process. This self-heating mechanism reduces processing time and improves productivity.
3Temperature
If the portion to be adhered is heated from both outer side portions by heat conduction, then the adhered portion reaches required temperature, but temperature management becomes difficult due to heat transfer efficiency and heat dissipation
Solution Approach 1:
The patent extracts the heating process from the adhesion process by heating the stabilizer bar separately before insertion. Instead of heating the stabilizer bar in place within the rubber bush (which would require complex temperature management from both sides), the bar is heated externally in advance to 180-280°C. This separation simplifies temperature management to a single-step external heating process, eliminating the complexity of managing heat transfer from both sides during adhesion.
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 approach prevents poor appearance and enhances working efficiency while ensuring high adhesion accuracy by controlling the temperature management of the adhered portion, reducing the risk of damage and improving overall manufacturing quality.
Implementation Method 1
a heating step of heating the portion to be adhered of the stabilizer bar; wherein the heating step is separately performed as a step preceding the fitting and adhering steps and comprises heating by high frequency induction heating at a frequency of 1 kHz to 50 kHz
Implementation Method 2
a rubber bush, provided with a centrum at which a vulcanizing adhesive (cure adhesive) is coated, is fitted on a portion to be adhered of the stabilizer bar. Then, portions of the stabilizer bar that are positioned outer side of the fitted position are heated by high-frequency induction heating to heat the portion to be adhered by heat conduction and cause a vulcanizing reaction
Implementation Method 3
heat the portion to be adhered by heat conduction and cause a vulcanizing reaction
Data Source
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AI summary
A method includes a coating step of coating a vulcanizing adhesive at a surface of a vulcanized centrum of a rubber bush; a heating step of heating a portion to be adhered of a stabilizer bar; a fitting step of fitting the centrum of the rubber bush at which the vulcanizing adhesive is coated on the heated portion to be adhered of the stabilizer bar; and an adhering step of clamping the rubber bush in a radial direction by a clamping device to adhere the rubber bush on the portion to be adhered of the stabilizer bar.