Cutting Machine Temperature Compensation for Thermal Path Accuracy
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Solution Overview
Problem
Cutting machines with fiber composite and metal components experience undesirable curvature due to differing thermal expansion coefficients, leading to positioning inaccuracies and faulty cutting results, with existing solutions being costly, heavy, or compromising stiffness.
Innovation Solution
Implementing temperature sensors along the guide rail of a cutting machine to measure thermal expansion and adjust the cutting path in real time using a computer unit, utilizing a look-up table or mathematical formulas for compensation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If a fiber composite beam with metal guide rails is used, then the beam achieves high stiffness with low weight, but thermal expansion differences cause curvature and positioning inaccuracies
Solution Approach 1:
The system changes the parameter being controlled from physical beam dimensions to digital cutting path coordinates. Temperature sensors detect thermal expansion, and the control unit compensates by adjusting the cutting path coordinates mathematically, rather than trying to prevent physical expansion mechanically.
Solution Approach 2:
The patent replaces mechanical compensation methods (floating mounts, segmented clamping elements) with a computational approach. Temperature measurements are converted into coordinate adjustments through software algorithms, substituting mechanical complexity with digital processing.
2Reliability
If floating mounting with rolling bearing and needle bearings is used, then thermal expansion is accommodated, but the solution becomes costly and heavy
Solution Approach 1:
The patent replaces the mechanical floating mounting system with temperature sensors and software compensation. Instead of using physical bearings and mounting mechanisms to accommodate expansion, the system uses digital coordinate adjustment based on temperature measurements.
Solution Approach 2:
The patent extracts the thermal expansion compensation function from the mechanical mounting system and transfers it to the control software. The mounting system itself remains simple and fixed, while the compensation is performed separately through coordinate transformation algorithms.
3Reliability
If floating mounting with rolling bearing and needle bearings is used, then thermal expansion is accommodated, but the solution becomes complex and cannot be scaled to smaller machines
Solution Approach 1:
The patent replaces the complex mechanical floating mounting system with a simple fixed mounting combined with software compensation. Temperature sensors mounted on the beam provide data to the control unit, which calculates coordinate adjustments, eliminating the need for complex mechanical accommodation mechanisms.
Solution Approach 2:
The software-based compensation system is universal and can be applied to cutting machines of any size. The same temperature sensing and coordinate adjustment approach works for both large and small machines, unlike the mechanical floating mounting which is only suitable for large machines.
4Temperature
If fiber orientation is changed to influence thermal behavior, then thermal expansion is reduced, but bending stiffness is significantly reduced
Solution Approach 1:
Instead of changing the fiber orientation parameter to control thermal behavior, the patent changes the control parameter from physical beam properties to digital cutting path coordinates. The beam maintains its optimal fiber orientation for stiffness, while software compensation handles thermal effects.
Solution Approach 2:
The patent accepts the thermal expansion characteristic of the fiber composite beam as unavoidable, but converts this potential harm into a measurable parameter. Temperature sensors detect the expansion, and the control software uses this information to adjust cutting paths, turning a structural limitation into a controllable variable.
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
Achieves precise temperature compensation with minimal design and computational effort, ensuring accurate cutting paths despite thermal changes, applicable to smaller machines.
Implementation Method 1
the coefficient of linear expansion of fiber composites—at least in the longitudinal direction of the fibers—is typically lower or significantly lower than that of the metal guide rails
Data Source
AI summary
Disclosed is a cutting machine and a method for controlling a cutting machine with a retrieval of a cutting job for processing an object on a working surface of the cutting machine with a cutting device, a defining of a cutting path based on the cutting job, a continuous retrieval of position data, and a guidance based on the position data, of the cutting device along the cutting path for processing, in particular cutting, the object, characterized by a temperature compensation functionality with continuous retrieval of temperature data from one or more temperature sensors, and using the temperature data for defining the cutting path and/or for adjusting the cutting path.