Five-Axis Measurement Fixture for Fast Precision Error Compensation
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Solution Overview
Problem
Existing five-axis machine tools face challenges in quickly performing precision measurement and compensation, requiring expensive equipment and prone to human errors due to complex and time-consuming processes.
Innovation Solution
A five-axis space precision measurement fixture with a specially designed body structure and arrangement of first and second balls, allowing for non-contact photoelectric measurement, simplifying the process and reducing human error.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional laser interferometers and pointer gauges are used for five-axis accuracy measurement, then measurement precision can be achieved, but the measurement process becomes extremely complex and time-consuming (taking several days)
Solution Approach 1:
The patent extracts the measurement function from complex traditional equipment (laser interferometers and pointer gauges) and concentrates it into a simplified integrated fixture system with built-in measurement features, eliminating the need for separate expensive equipment while reducing measurement time significantly
Solution Approach 2:
The measurement fixture is designed as a universal device that can perform multiple measurement functions (verticality, positioning accuracy, rotational geometric errors) simultaneously, replacing multiple specialized traditional measurement tools and enabling comprehensive five-axis accuracy verification in one setup
2Measurement precision
If traditional measurement equipment and methods are used, then comprehensive error verification (43 error items) can be performed, but the device complexity and measurement process complexity increase significantly
Solution Approach 1:
The patent merges multiple measurement functions and features into a single integrated fixture design, combining verticality measurement features, positioning accuracy features, and rotational error measurement capabilities into one unified device, thereby reducing system complexity while maintaining comprehensive verification capability
Solution Approach 2:
The fixture is designed with segmented functional features (first-ball screw holes, second-ball screw holes, inclined surfaces, reference surfaces) that can be independently configured but work together systematically, allowing complex measurements to be broken down into manageable measurement steps
3Measurement precision
If traditional measurement methods are used, then detailed error analysis can be performed, but human deviations in measurement become unavoidable
Solution Approach 1:
The measurement fixture is designed with self-referencing features where the fixture itself provides the reference standards (reference surfaces, reference ball screw holes) for measurement, eliminating the need for external reference equipment and reducing human intervention, thereby minimizing human deviation and improving measurement reliability
Data Source
AI summary
A five-axis space precision measurement fixture includes a body, screw holes to install first balls and second balls. The body has a first surface, a second surface, a third surface and an inclined surface located with respect to the third surface between the first surface and the second surface. The first surface and the second surface are parallel to each other and are located on opposite sides of the third surface. An included angle between the inclined surface and the third surface is 45 degree. The first balls are equal-spacing into columns and rows on the first surface, and each of the first balls is protruded from the first surface along a first direction. The second balls are also equal-spacing disposed on the inclined surface, and each of the second balls is protruded from the inclined surface along a second direction which is vertical to the first direction.