Overview
Hexagon Coordinate Measuring Machines (CMMs) are industrial metrology systems designed for high-precision 3D measurements of components. Manufactured by Hexagon AB, a global leader in measurement technologies, these CMMs integrate mechanical probing systems with advanced software like PC-DMIS to analyze complex geometries. They are widely adopted in sectors demanding tight tolerances, such as aerospace and automotive manufacturing. Hexagon offers diverse CMM configurations, including bridge-type, gantry, and portable arm models, catering to different workpiece sizes and measurement needs. Their systems often feature modular designs, allowing upgrades with laser scanners or multi-sensor probes for enhanced versatility.
Structure and Working Principle
A standard Hexagon bridge-type CMM consists of three orthogonal axes (X, Y, Z) moving along air bearings or mechanical guides, with a probing head mounted on the Z-axis. The machine’s granite base ensures stability, while linear encoders track axis positions with micron-level precision. Touch-trigger probes contact the workpiece surface, recording coordinate data points for analysis. Modern Hexagon CMMs employ closed-loop control systems and environmental compensation (e.g., for thermal expansion) to maintain accuracy. Scanning probes can capture continuous surface data, enabling faster inspection of freeform shapes compared to discrete-point probing.
Key Features
Hexagon CMMs stand out for their metrology-grade accuracy, with volumetric errors often below 1.5 µm/m. Their proprietary controllers optimize motion dynamics to minimize vibration-induced errors. Integration with PC-DMIS software allows automated measurement routines, GD&T analysis, and CAD-to-part comparisons. Advanced models feature real-time error compensation (RDS probe heads), wireless probes, and collision detection. Optional accessories like rotary tables enable 5-axis measurements, while non-contact laser scanners expand applications to delicate or soft materials.
Application Areas
In automotive manufacturing, Hexagon CMMs verify engine block dimensions, transmission components, and body panel fits. Aerospace applications include turbine blade inspections and airframe alignment checks, where μm-level deviations impact performance. Medical device producers use them to validate implants and surgical tools. Beyond production, these CMMs support reverse engineering by digitizing legacy parts for CAD modeling. They are also deployed in research institutions for material studies and prototyping validation.
Maintenance and Precautions
Daily maintenance includes cleaning guideways with lint-free cloths and checking air bearings for contamination. Annual calibration by certified technicians is recommended, using artifacts like gauge blocks or step masters. Environmental control is critical—temperature fluctuations above ±1°C/hour can introduce measurement drift. Avoid measuring dirty or oily parts without cleaning; debris may damage probe styli. For long-term storage, lubricate mechanical components and power the system monthly to prevent electronics degradation.
B2B Procurement Guide
When sourcing Hexagon CMMs, specify measurement volume (e.g., 2m x 1m x 0.6m), required accuracy (ISO 10360-2 standards), and probe types. Compare bundled software capabilities—basic packages may lack CAD integration or statistical process control (SPC) tools. Lead times typically range 8–12 weeks for custom configurations. Consider total cost of ownership, including training, calibration services, and potential future upgrades. Leasing options are available for low-volume needs.
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