What is ISO 20170-Geometrical product specifications (GPS) about?
ISO 20170 is an international standard that covers aspects of geometrical product specifications (GPS).
ISO 20170 describes principles and tools to control a manufacturing process in accordance with a GPS specification. For this purpose, a set of one or more complementary, independent characteristics (size, form, orientation, and location characteristics independent to each other) that correlate to the manufacturing process parameters and to the manufacturing process coordinate system established from the manufacturing datum system are used.
ISO 20170 describes the concept of decomposition of the macro-geometrical part of the GPS specification.
Note: ISO 20170 does not cover the micro-geometry, i.e., surface texture.
Who is ISO 20170-Geometrical product specifications (GPS) for?
ISO 20170 on the Decomposition of geometrical characteristics is beneficial for:
- Engineers and mathematicians
- An entity responsible for providing geometrical support
- Engineering graphical designers
- Production workers
- Metrologists
- Manufacturers
Why should you use ISO 20170-Geometrical product specifications (GPS)?
ISO 20170 is a geometrical product specification (GPS) standard and is to be regarded as a fundamental GPS standard. It influences indirectly chain-link E of the chains of standards of geometrical characteristics like size, distance, form, orientation, location, and run-out, in the general GPS matrix model. ISO 20170 lays out the measurement given in chain-link E that is decomposed to evaluate quantity values of a geometrical characteristic, and to define manufacturing adjustment values, not to manage the conformance of a workpiece.
ISO 20170 allows the evaluation of conformance or non-conformance by defining a limit value for a geometrical characteristic as a univariate characteristic. The goal of ISO 20170 is to state the decomposition of the measurement result that enables you to isolate parameter values that can be used to adjust the manufacturing process. It uses simple examples to illustrate the fundamental principles to its users.
ISO 20170 is a part of the ISO/GPS matrix model that gives an overview of the ISO/GPS system. It applies the fundamental rules and the default decision rules of ISO/GPS unless otherwise indicated.
