Adhesive Temperature Testing for Magnetic Pole Coating Wetting
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The protective coating of magnetic poles in permanent magnetic machines is prone to defects such as micro-cracks, leading to a decline in mechanical performance due to moisture infiltration and thermal expansion mismatch, which reduces the service life of the coating.
Innovation Solution
A test apparatus is used to determine the optimal adhesive temperature for a fiber-reinforced material and magnetic pole member by measuring contact angles at different temperatures, allowing for improved wetting and bonding during the molding process, thereby enhancing the quality and durability of the protective coating.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If adhesive temperature is increased to improve wetting effect, then adhesion quality improves, but thermal expansion mismatch and micro-crack formation increase
Solution Approach 1:
The patent applies parameter changes by precisely controlling the adhesive temperature within a specific range (20-40°C) to optimize wetting effect while avoiding excessive heat that causes thermal expansion mismatch. The temperature parameter is adjusted to balance adhesion quality and prevent micro-crack formation, resolving the contradiction between strength and reliability.
Solution Approach 2:
The patent employs beforehand cushioning by pre-heating the adhesive to an optimal temperature before application, ensuring proper flow and wetting characteristics. This pre-conditioning prevents subsequent thermal shock and micro-crack formation during curing, thereby protecting the coating's long-term reliability while maintaining good adhesion.
2Reliability
If adhesive temperature is decreased to reduce thermal expansion mismatch, then micro-crack formation decreases, but wetting effect deteriorates
Solution Approach 1:
The patent uses parameter changes by establishing a lower temperature boundary (20°C) to prevent thermal expansion issues while maintaining adequate wetting. The temperature parameter is optimized to balance both requirements, ensuring the adhesive flows sufficiently without causing thermal stress that leads to micro-cracks.
3Manufacturing precision
If adhesive viscosity is reduced to improve flow and filling, then gap filling improves, but adhesion strength decreases
Solution Approach 1:
The patent applies parameter changes by controlling adhesive temperature to optimize viscosity within a specific range. The temperature is adjusted to reduce viscosity enough for proper gap filling while maintaining it high enough to ensure strong adhesion, thus resolving the contradiction between manufacturing precision and strength.
Solution Approach 2:
The patent employs dynamics by allowing the adhesive viscosity to change dynamically during the application process. The viscosity is initially reduced through temperature control to enable flow and gap filling, then increases during curing to provide strong bond strength, accommodating both requirements at different stages.
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
The apparatus enables the determination of the best adhesive temperature for the fiber-reinforced material and magnetic pole member, optimizing the wetting effect and improving the mechanical performance and service life of the protective coating by ensuring better adhesion and resistance to environmental factors.
Implementation Method 1
a heating member (12) arranged inside the adhesive placing cavity or outside the adhesive placing cavity, and configured to heat the adhesive (100)
Implementation Method 2
a temperature sensor (11) configured to measure a temperature of the adhesive (100) inside the adhesive placing cavity
Implementation Method 3
a meniscus formed at a contact interface between the adhesive and the tested member
Implementation Method 4
the adhesive (resin type) is poured in vacuum into the mold cavity. The resin, when flowing along the axial direction from one end to the other end of the mold cavity, impregnates the fiber-reinforced material, fills a gap between the magnetic pole member 3 and the magnetic yoke wall 1
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A magnetic pole part, a fiber-reinforced material, a test apparatus therefor, and a control method for the test apparatus. The test apparatus comprises: a container (10) provided with an adhesive agent container therein for containing an adhesive agent; a positioning member for positioning a member to be tested inside the container (10) and partially inside the adhesive agent container; an adhesive agent heating member 912) for heating the adhesive agent; and an adhesive agent temperature sensor (11) for measuring the temperature of the adhesive agent; a controller (22) for turning on or off the adhesive agent heating member (12) according to a temperature signal detected by the adhesive temperature sensor (11) so as to keep the adhesive agent in the adhesive agent container at a preset temperature. The test apparatus can obtain an optimal temperature combination of a glass fiber-reinforced material or the magnetic pole part and the adhesive agent in permanent magnet motor magnetic pole protection molding adhesive-injection process in advance, which is favorable for obtaining data of key influence factors for protection cover layer molding quality control.