Gear Grinding Machine Insulation for Thermal Accuracy Stability
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Solution Overview
Problem
Existing grinding machines face challenges in maintaining accurate machine performance due to heat input and heat dissipation from cooling fluids, leading to temperature-related expansions and fluctuations in machine accuracy, especially in industrial series production where tight tolerances are required.
Innovation Solution
The implementation of an insulation device that thermally decouples load-bearing structures and components of the grinding machine from fluid flows and heat sources, ensuring consistent temperature and preventing heat transfer from cooling fluids or environmental influences.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If cooling fluid is introduced into the grinding contact to cool the workpiece and tool, then the workpiece and tool are cooled and friction is reduced, but heat is transferred to the machine bed causing thermal expansion and loss of machine accuracy
Solution Approach 1:
The patent introduces a machine bed as an intermediary thermal management component. The machine bed is deliberately designed to absorb heat from the cooling fluid, acting as a heat sink that protects other precision components from thermal effects. This mediator approach allows the cooling fluid to perform its cooling function while the machine bed captures the resulting heat before it can affect critical machining accuracy.
Solution Approach 2:
The patent changes the thermal parameters of the machine bed by intentionally allowing it to heat up during machining operations. This parameter change is controlled and expected, as the machine bed's temperature increase is managed to protect other components. The system accepts localized temperature changes in the machine bed to maintain overall machining precision.
2Reliability
If cooling fluid is continuously applied during workpiece change and machining breaks, then a uniform cooling volume flow is achieved, but the temperature of the cooling fluid changes and machine accuracy fluctuates
Solution Approach 1:
The machine bed serves as a thermal buffer and intermediary that absorbs temperature fluctuations from continuous cooling fluid application. By maintaining a large thermal mass, the machine bed stabilizes the thermal environment for precision components even when cooling fluid temperature varies during workpiece changes and machining breaks.
Solution Approach 2:
The patent creates a stable thermal reference environment by using the machine bed as a thermal reservoir. The machine bed's large thermal mass copies or replicates a stable temperature condition for critical components, isolating them from the variable temperature of continuously flowing cooling fluid.
3Manufacturing precision
If tight tolerances are required for gear grinding in industrial series production, then production quality is improved, but machine accuracy is more sensitive to temperature fluctuations and vibrations
Solution Approach 1:
The machine bed acts as a stable thermal intermediary that supports the entire machining system. By providing a large thermal mass and stable base, it mediates between external temperature fluctuations and the precision machining components, enabling tight tolerances to be maintained even in variable environmental conditions.
Solution Approach 2:
The patent utilizes the machine bed's thermal phase stability - its ability to remain in a stable thermal state despite heat input from cooling fluid. This thermal phase stability provides a reliable reference frame for precision machining, allowing tight tolerances to be achieved despite environmental variations.
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 solution effectively maintains machine accuracy within tight tolerances by minimizing temperature-related fluctuations, ensuring reliable production even under varying environmental conditions.
Implementation Method 1
at least one insulation device (24) is provided in order to protect a load-bearing structure (26) and/or a component of the grinding machine (10) from a fluid flow and/or sparking
Implementation Method 2
The cooling fluid absorbs heat from the grinding contact of the components involved—namely the workpiece and the tool—and is therefore heated in turn
Implementation Method 3
the heat input of the cooling fluid into the machine bed can cause machine axes or machine axis holders to undergo temperature-related expansion
Data Source
AI summary
A grinding machine for gear grinding, having a tool spindle for holding a gear machining tool, having a workpiece spindle for holding a workpiece to be toothed, having controlled machine axes for executing relative movements for chip-removing machining of the workpiece to be toothed by the gear machining tool, having a device for applying a cooling fluid, which is set up to introduce cooling fluid into a region of the chip removal between the gear machining tool and the workpiece to be toothed during the chip-removing machining operation, wherein at least one insulation device is provided in order to protect a load-bearing structure and/or a component of the grinding machine from a fluid flow and/or sparking.