Shrink-Fit Chuck Heating With Emissivity-Independent Temperature Sensing
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Solution Overview
Problem
Existing shrink-fit devices for heat treatment of chucks face challenges in accurate temperature measurement due to unknown emissivities of different materials, leading to measurement errors and reduced reliability.
Innovation Solution
The device employs multiple non-contact temperature sensors, including radiation detectors and a ratio pyrometer, arranged around the receiving area to measure the surface temperature of shrink-fit chucks, compensating for varying emissivities by averaging or using different calibration settings, and incorporates a control unit to adjust heating or cooling processes based on the measured temperature.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single radiation thermometer is used for temperature measurement, then the device structure is simple, but measurement accuracy deteriorates due to unknown emissivities of different materials
Solution Approach 1:
The patent divides the temperature measurement function into multiple independent radiation thermometers, each configured to measure different portions or aspects of the shrink-fit chuck temperature. This segmentation allows the system to compensate for emissivity variations by comparing measurements from multiple sensors, thereby maintaining measurement accuracy without requiring complex emissivity calibration for each material type.
Solution Approach 2:
The patent creates a universal temperature measurement system that can accurately measure temperatures of different materials (shrink-fit chucks with various emissivities) using a standardized multi-sensor configuration. The system achieves multi-functionality by being able to handle diverse material types without requiring material-specific calibration, thus resolving the contradiction between structural simplicity and measurement accuracy.
2Measurement precision
If multiple temperature sensors with different calibration settings are used, then temperature measurement accuracy improves, but device complexity increases
Solution Approach 1:
The patent applies local quality by positioning temperature sensors at specific locations around the shrink-fit chuck, with each sensor targeted at particular surfaces or regions. This strategic placement allows the system to capture temperature distribution while minimizing the need for complex calibration settings, as each sensor is optimized for its specific measurement zone rather than requiring universal calibration for all possible orientations.
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 provides accurate and reliable temperature measurement independent of emissivity, ensuring safe and efficient heat treatment of shrink-fit chucks by controlling the heating or cooling process effectively.
Implementation Method 1
inductive heating or cooling of shrink-fit chucks
Implementation Method 2
inductive heating
Implementation Method 3
cooling of shrink-fit chucks
Implementation Method 4
cooling process
Implementation Method 5
radiation detectors and a ratio pyrometer, arranged around the receiving area to measure the surface temperature
Implementation Method 6
radiation/IR thermometer, which detects the shell temperature or surface temperature
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
The invention relates to a device (2) for heat treatment, in particular inductive heating or cooling, of shrink-fit chucks (4) for shank tools (6), in particular a shrink-fit device (2) or a cooling device (2) or a shrink-fit device with a cooling device (2), with a receiving device (8), in particular a receiving opening (8), for receiving a shrink-fit chuck (4), a heat treatment unit (12) surrounding the receiving device (8) with respect to a central axis (10), in particular concentrically, in particular an induction coil arrangement (12) or a cooling unit (12), and a measuring unit (14) for, in particular non-contact, temperature measurement of the shrink-fit chuck (4).In order to be able to measure the shell temperatures of shrink-fit chucks (4) inserted into the receiving opening (8) as accurately as possible, the measuring unit (14) is provided to have several temperature sensors (16) arranged around the receiving device (8) or a temperature sensor (16') inclined about the central axis for detecting, in particular without contact, a shell temperature of a shrink-fit chuck (4) arranged in the receiving device (8), or that the measuring unit (14) has several sensors (60) arranged around the receiving device (8), wherein at least one first of these is a temperature sensor (16) for detecting, in particular without contact, a shell temperature of a shrink-fit chuck (4) arranged in the receiving device (8), and at least one second of these is a different type of sensor (62) for detecting another property of the shrink-fit chuck (4) arranged in the receiving device (8).