Dual Induction Temperature Control for Stable Micro-Nano Indentation
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Solution Overview
Problem
Existing micro-nano indentation testing devices struggle to accurately test micromechanical properties under impact and high-temperature conditions due to interference from electromagnetic induction heating, uneven laser heating, and difficulty in maintaining consistent test conditions.
Innovation Solution
A dual cooperative induction temperature control device using electromagnetic induction heating combined with phase change heat storage to stabilize the temperature of the indenter and specimen at a phase change temperature, eliminating magnetic field interference and ensuring consistent temperature through phase change heat release.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If electromagnetic induction heating technology is used to heat the indenter and specimen, then non-contact heating and high energy utilization rate are achieved, but an alternating magnetic field is generated that interferes with the testing results of high-precision instruments
Solution Approach 1:
The electromagnetic induction heating is performed in advance before the actual indentation test. The indenter and specimen are heated to the target temperature using electromagnetic induction heating, and then the heating is stopped before the test begins. This preliminary heating action allows the magnetic field interference to be eliminated before measurement, while still achieving the desired high-temperature test conditions.
Solution Approach 2:
A heating insulation chamber is used to maintain the temperature of the indenter and specimen after heating. The chamber insulates the heated components, allowing them to retain their temperature without continuous electromagnetic induction heating, thereby reducing magnetic field interference during the actual test while maintaining high-temperature conditions.
2Measurement precision
If the same specimen is subjected to multi-point testing to ensure accuracy, then the final average value is taken as the testing result, but the operation becomes more complex and time-consuming
Solution Approach 1:
The pressing rod is designed with both heating and indentation functions integrated into a single component. The pressing rod can perform electromagnetic induction heating and then switch to indentation testing without requiring separate tools or complex reconfiguration, enabling multi-point testing to be performed efficiently while maintaining consistent heating conditions across all test points.
3Temperature
If laser heating is used to heat the indenter and specimen, then heating can be localized, but the heating is uneven and difficult to control
Solution Approach 1:
The heating function is extracted from the indentation process and performed separately using electromagnetic induction heating before the test. This separation allows the heating to be optimized independently from the mechanical testing, achieving uniform temperature distribution through electromagnetic induction while maintaining precise control over the indentation process without thermal interference.
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 device maintains precise temperature control with minimal temperature difference between the indenter and specimen, enhancing test accuracy and reducing interference with precision instruments.
Implementation Method 1
a first electromagnetic induction heater configured to perform non-contact heating on the pressing rod; a second electromagnetic induction heater configured to perform non-contact heating on the stage
Implementation Method 2
a phase change heat storage material is placed in the first cavity and the second cavity, and a phase change temperature of the phase change heat storage material is a target temperature for testing a specimen
Data Source
AI summary
The present invention discloses a dual cooperative induction temperature control device and a control method for a micro-nano impact indentation tester. The device comprises a first cavity and a second cavity which are respectively arranged in a pressing rod and an stage, wherein a phase change heat storage material is arranged in the two cavities, and a phase change temperature of the phase change heat storage material is a target temperature of a specimen for testing; a first electromagnetic induction heater and a second electromagnetic induction heater which respectively perform non-contact heating on the pressing rod and the stage; and temperature detection mechanisms configured to detect the temperature of the specimen and the indenter. The temperature control device of the present invention combines electromagnetic induction heating and phase change heat storage, thus has the advantages of no interference to the testing of a precise instrument and good temperature stability.