Hexagon CALIPRI RCx Portable Hot-Strip Profile Measurement System

Overview

The Hexagon CALIPRI RCx is a purpose-built, portable optical profile measurement system engineered for real-time cross-sectional geometry analysis of hot-rolled steel sections—directly on the production line. Unlike conventional contact-based profilometers or offline lab metrology tools, the RCx employs high-stability laser line scanning (LLS) triangulation to capture full 2D/3D contour data without physical contact, eliminating thermal distortion risks and mechanical wear. Its core design addresses a critical gap in modern long-product rolling mills: the need for rapid, repeatable, and traceable dimensional verification under elevated temperatures (up to ~1000 °C surface temperature, with appropriate standoff distance and cooling interface). The system operates between roughing, intermediate, and finishing stands—enabling immediate feedback for roll gap adjustment, pass schedule validation, and die (groove) alignment diagnostics. As the only commercially deployed portable hot-profile solution certified for in-line use in demanding mill environments, the RCx supports continuous process optimization while complying with foundational quality frameworks including ISO 9001:2015, ASTM E2925 (Standard Guide for In-Process Dimensional Metrology), and internal GMP-aligned calibration protocols.

Key Features

• Rotating Calipri (RC) technology: A patented multi-angle scanning architecture that rotates the laser line around the section axis during acquisition, delivering complete circumferential coverage without manual repositioning.
• True hot-state operation: Designed for deployment in ambient mill conditions up to 50 °C, with IP65-rated hardware and thermally stable optical mounts enabling reliable measurements on red-hot billets, bars, and rails (with optional heat-shield adapters).
• Integrated wireless workflow: Real-time profile visualization on a ruggedized 10.1″ WUXGA tablet via secure Wi-Fi; no cabling constraints during dynamic mill-floor operation.
• Sub-0.2 mm lateral resolution and measurement accuracy: Achieved through calibrated LLS sensor optics, geometric correction algorithms, and on-device spatial referencing against known reference standards.
• Modular groove library support: Pre-loaded digital templates for common rail, rebar, angle, channel, and flat-bar profiles—enabling rapid comparison against nominal CAD geometries and automatic deviation mapping (e.g., corner radius error, flange taper, web thickness variation).
• Zero-sample-interruption metrology: Eliminates the need for cut-and-cool sampling, reducing cycle time for new profile commissioning by up to 70% versus traditional methods such as shadowgraphy or caliper-based manual inspection.

Sample Compatibility & Compliance

The CALIPRI RCx accommodates round, square, rectangular, and complex asymmetric sections up to Ø170 mm or 135 × 135 mm cross-sections. It is routinely deployed on hot-strip mills, bar mills, and rail mills where surface emissivity, scale formation, and thermal gradients pose challenges to optical systems. All measurement data are timestamped, geotagged (via optional mill GPS integration), and stored with full audit trail metadata—including operator ID, machine stand number, ambient temperature, and sensor calibration status. The system supports traceable calibration using NIST-traceable gauge blocks and certified reference sections, satisfying requirements for ISO/IEC 17025-compliant labs and FDA 21 CFR Part 11–aligned electronic records when integrated into enterprise MES/QMS platforms.

Software & Data Management

The embedded CALIPRI software suite provides real-time deviation heatmaps, statistical process control (SPC) charting (X̄-R, Cpk), and automated report generation in PDF, XML, CSV, and DXF formats. Raw scan data are archived in vendor-neutral formats compatible with third-party metrology analysis tools (e.g., PolyWorks, Geomagic Control). Audit logs record every user action—including parameter changes, report exports, and calibration events—with immutable timestamps. Optional cloud synchronization enables centralized dashboard monitoring across multiple mill lines, supporting predictive maintenance alerts based on trended profile drift.

Applications

• Hot-profile validation during trial rolling of new section designs
• Rapid groove wear assessment and roll change scheduling
• Roll alignment verification and mill stand calibration
• Root-cause analysis of dimensional nonconformities (e.g., camber, twist, undersize corners)
• Supporting AI-driven rolling model training with high-fidelity ground-truth geometry datasets
• Pre-shipment QA for export-grade long products requiring EN 10024, ASTM A6/A6M, or JIS G 3101 compliance documentation

FAQ

Can the CALIPRI RCx measure sections at temperatures above 800 °C?
Yes—when used with recommended standoff distances (≥300 mm) and optional passive heat shields, the RCx captures usable profiles on surfaces up to ~1000 °C. Emissivity compensation and dynamic exposure control maintain signal integrity.
Is the tablet’s battery life sufficient for a full shift?
The Li-ion battery supports ≥5 hours of continuous scanning and reporting. Hot-swap battery kits and mill-integrated charging docks are available as accessories.
Does the system require annual factory recalibration?
Field calibration using certified reference sections is performed before each shift. Full traceable recalibration is recommended every 12 months or after 5000 measurement cycles—per ISO 17025 Clause 6.6.
Can measurement data be imported into our existing MES?
Yes—via Ethernet or USB, using standardized XML schemas compliant with ISA-95 and MTConnect v1.5 specifications.
What safety certifications does the RCx hold for mill-floor deployment?
It meets IEC 60079-0 (explosion-proof general requirements), CE Machinery Directive 2006/42/EC, and carries ATEX Zone 22 certification for use in areas with combustible dust accumulation.