ISO 8015 2011 Geometrical product specifications (GPS)

007

之前使用GPS，创建图纸，并没有系统性的学习各种GPS标准，市场AMSE Y14.5 与ISO 混着使用，今天开始要系统性独自学习GPS标准了，把分享经验和各种问题分享给大家。
学习GD&T，首先需要了解 ISO 8015。ISO 8015 是所有 GPS 标准的基础。
今天看的 ISO 8015_2011第二版比第一版 ISO 8015 1985区别好大了。

重点看看基本原则 (Fundamental principles)
5.1 Invocation principle （翻译成“调用原则”^_^）
Once a portion of the ISO GPS system is invoked in a mechanical engineering product documentation, the entire ISO GPS system is invoked, unless otherwise indicated on the documentation, e.g. by reference to a relevant document.
部分ISO GPS SYSTEM被调用，整个ISO 系统被调用。否则看其他。需要看看ISO/TC 213和ISO/TR 14638， ISO GPS SYSTEM什么意思。
同时提出，ISO 8015 不是必要写着图纸上面，它也不是必须的来唤醒ISO GPS SYSTEM。

5.2 Principle of GPS Standard hierarchy (GPS标准的优先顺序）
Fundamental GPS standards;
Global GPS standards;
General GPS standards;
Complementary GPS standards.

在每个标准后面都说明了这是什么标准



5.3 Definitive drawing principle，很难理解。
注意 这里的drawing 并不是手上的图纸，包含了所有描述零件的文件。

5.4 Feature principle
注意: NOTE 2 There are indications available to specify that a requirement does not apply to the entire feature, e.g. when a
part of a feature is indicated with a long-dashed dotted wide line or when the ACS (any cross-section) indication is used.

上面新加的原则感觉都是废话。

5.5 Independency principle (独立原则)
除了被写在标准中的M,CZ,E等，所有标准都是独立的。

5.6 Decimal principle
很好理解，+/-0,2 与+/-0,200 000 ...等同

5.7 Default principle
default principle 可以被一些备注所改变

5.8 Reference condition principle
ISO 1

5.9 Rigid workpiece principle
所有测量零件被认为是在自由状态下，而且是刚性的。否则需要参考ISO 10579。之前我出的图纸标注F (free state)如果根据这一条那是有问题了。

5.10 Duality principle
5.10.1 Operator concept
A specification operator is a set of prescribed operations in a prescribed order.
The verification operator is the physical implementation of the specification operator.

5.10.2 Duality principle statement
The duality principle states that:
1) a GPS specification defines a GPS specification operator independent of any measurement procedure or measurement equipment, and;
2) the GPS specification operator is realized in a verification operator which is independent of the GPS specification itself, but is intended to mirror the GPS specification operator.

5.11 Functional control principle

5.12 General specification principle
需要了解什么是general specification ISO 1302, ISO 2768 and ISO 13715

5.13 Responsibility principle See ISO 14253-1

6 Rules for indication of default specification operators

6.2 General ISO default GPS specification

6.3 Altered default GPS specification
终于看见有图片注释了


7 Rules for indication of special specification operators

总结，太抽象了，越来越糊涂，需要对8015 2011里面提到的每个标准逐一了解。

geometrical product specification and verification system developed in ISO by ISO/TC 213
ISO/TC 213 原来是个委员会

原文地址：https://zhuanlan.zhihu.com/p/25646825