Internal Gear Concentricity Measurement in Deep Shaft Toothings
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Solution Overview
Problem
Current methods for measuring the concentricity of internal toothings, especially those with small diameters deep within shafts, are time-consuming and costly, and existing laser techniques are not precise when components are wet with machining media.
Innovation Solution
A device comprising a spindle unit, adjusting element, and measuring unit with a gauge gear wheel that can be moved into engagement with the internal toothing to measure concentricity deviations, allowing for precise measurement even in deep cavities without requiring direct contact, using a pneumatic or hydraulic actuator for positioning and a spindle holder for rotational movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If laser technique is used to measure concentricity of internal toothings, then measurement precision is improved, but measurement time increases and cost increases
Solution Approach 1:
The patent replaces the optical laser measurement system with a mechanical measurement system using a gauge gear wheel that physically engages with the internal toothing. This mechanical approach allows for direct contact measurement that is both precise and rapid, eliminating the time-consuming nature of laser scanning while maintaining measurement accuracy through the gear engagement mechanism.
Solution Approach 2:
The invention extracts only the essential measurement function from the complex laser system by using a simple gauge gear wheel that directly engages with the internal toothing teeth. This extraction of the core measurement capability eliminates unnecessary complexity and reduces measurement time while maintaining the ability to detect concentricity deviations.
2Measurement precision
If laser technique is used for measurement, then measurement capability is improved, but device complexity increases
Solution Approach 1:
The patent substitutes the complex optical laser measurement device with a simple mechanical gauge gear wheel assembly. The mechanical system consists of basic components that can be easily manufactured and maintained, dramatically reducing device complexity while achieving the same measurement objective through direct mechanical engagement with the internal toothing.
Solution Approach 2:
The gauge gear wheel is designed as a simple, inexpensive mechanical component that can be easily replaced if needed. This approach eliminates the need for expensive, complex laser measurement equipment while providing sufficient measurement capability for the intended application.
3Measurement precision
If coordinate-measuring machines are used to measure internal toothings, then measurement capability is improved, but measurement time increases and cost increases
Solution Approach 1:
The invention extracts the essential measurement function from the complex coordinate-measuring machine by using a dedicated gauge gear wheel that directly engages with the internal toothing. This specialized simple tool performs the specific measurement task rapidly without the overhead and complexity of a full coordinate-measuring system.
Solution Approach 2:
The patent replaces the complex mechanical coordinate-measuring machine with a simple mechanical gauge gear wheel that directly contacts and measures the internal toothing through gear engagement. This mechanical substitution provides both the measurement precision and the productivity needed for efficient manufacturing inspection.
Data Source
AI summary
A device and a method can be utilized to measure concentricity of an internal toothing of a component. Such a device may include a determination segment, which can determine a concentricity deviation, that includes a spindle unit comprising a tapping spindle with a gauge gear wheel arranged thereon and intended for tapping the concentricity of the internal toothing, and an output spindle for transmitting the tapped concentricity from the tapping spindle to a measuring unit. The output spindle may be arranged directly or indirectly on the tapping spindle. A spindle holder may hold and position the tapping spindle, the output spindle, or the spindle unit. An adjusting element may position the gauge gear wheel, and the measuring unit may compare the tapped concentricity with reference values.