VDI VDE 2630 Blatt-2-1 2015-06 PDF

Full title and description

STB VDI VDE 2630 Blatt-2-1 2015-06 — Computed tomography in dimensional measurement: Determination of the uncertainty of measurement and the test process suitability of coordinate measurement systems with CT sensors. This guideline specifies methods to quantify task-specific measurement uncertainty for coordinate measuring machines (CMM) equipped with computed tomography (CT) sensors and to use that uncertainty to assess the suitability of a test/process for given tolerances.

Abstract

This document defines a procedure to determine measurement uncertainty for dimensional CT measurements performed with coordinate measuring systems that use CT sensors. It links the determined uncertainty to a statistical assessment of "test process suitability" so that measurement capability and manufacturing/tolerance requirements can be mutually coordinated. The guideline contains procedural steps for determining uncertainty, verifying test-process suitability, and performing interim checks; an illustrative example (annex) demonstrates the approach with calibrated workpieces. A corrigendum addressing clarifications and corrections was issued in April 2023.

General information

• Status: Current (original publication 2015; corrigendum published April 2023)
• Publication date: June 2015 (Edition: 2015-06)
• Publisher: Verlag des Vereins Deutscher Ingenieure (VDI/VDE)
• ICS / categories: 17.040.20; 19.100; 35.240.80
• Edition / version: 2015-06 (with Berichtigung / corrigendum 2023-04)
• Number of pages: 47

Scope

The guideline applies to dimensional measurement tasks carried out using industrial computed tomography (CT) as part of coordinate measuring systems. It gives a method to determine a task-specific measurement uncertainty for CT-based CMMs and to evaluate whether a given measurement/test process is suitable for checking parts against specified tolerances. The scope covers the statistical basis for uncertainty evaluation, practical steps for verification and interim checking, and an example calculation using calibrated artefacts. It is intended for industrial CT systems used for geometric/dimensional inspection rather than medical CT applications.

Key topics and requirements

• Definition of task-specific measurement uncertainty for CT-based coordinate measurement systems.
• Linking measurement uncertainty to a test-process suitability statistic to assess if a measurement process can reliably verify part tolerances.
• Procedures for determination of uncertainty, including required inputs, calibration/example-based approaches and statistical evaluation.
• Verification steps for test process suitability and recommendations for interim checks (periodic verification).
• Requirements for documentation of measurement procedures, uncertainty budgets, and decision criteria when comparing uncertainty to tolerances.
• Annex with an example demonstrating determination of uncertainty and the assessment of test process suitability using calibrated workpieces.

Typical use and users

This guideline is typically used by industrial metrology laboratories, quality/inspection engineers, calibration laboratories, manufacturers of coordinate measuring machines and CT scanners, research organizations dealing with dimensional CT, and technical staff who plan, qualify or audit measurement processes. Use cases include capability assessment of CT-based inspection processes, acceptance testing, routine verification of CT measurement systems, and setting measurement plans that are matched to manufacturing tolerances.

Related standards

Relevant documents and adjacent guidance include other parts of the VDI/VDE 2630 series (fundamentals and definitions, influencing variables and recommendations, simulation-based uncertainty assessment, parameter determination), DIN/EN/ISO standards on CMM performance and inspection (for example application of DIN EN ISO 10360 for coordinate measuring machines), and general GPS/inspection guidance such as ISO standards on measurement and inspection procedures.

Keywords

computed tomography, CT, dimensional measurement, measurement uncertainty, test process suitability, coordinate measuring machine, CMM with CT sensor, verification, interim check, calibration artefact, VDI/VDE 2630

FAQ

Q: What is this standard?

A: VDI/VDE 2630 Blatt 2.1 (2015-06) is a guideline for computed tomography in dimensional measurement that specifies how to determine measurement uncertainty for coordinate measuring systems with CT sensors and how to assess the suitability of the measurement/test process for given tolerances.

Q: What does it cover?

A: It covers the procedure for calculating a task-specific measurement uncertainty for CT-based measurements, the statistical linkage between that uncertainty and test-process suitability, methods for verifying suitability, interim checks, and an illustrative example using calibrated workpieces.

Q: Who typically uses it?

A: Metrology and QA personnel in manufacturing, calibration and testing labs, CMM/CT system manufacturers, research institutes working on dimensional CT, and consultants who establish or audit CT measurement processes.

Q: Is it current or superseded?

A: The original guideline was published in June 2015 and remains the base document; a corrigendum (correction) addressing clarifications was published in April 2023. Users should apply the corrigendum together with the 2015 edition.

Q: Is it part of a series?

A: Yes. VDI/VDE 2630 is a series of guidelines on computed tomography in dimensional measurement; related parts cover fundamentals and definitions (Blatt 1.1), influencing variables and recommendations (Blatt 1.2), simulation-based methods (Blatt 2.2 / 2.3), and other complementary measurement guidance.

Q: What are the key keywords?

A: CT, computed tomography, dimensional measurement, measurement uncertainty, test process suitability, CMM with CT sensor, verification, calibration, VDI/VDE 2630.