Mechanical Drawing Interpretation for Industry

Geometric Dimensioning and Tolerancing (GD&T) is the common, powerful language of industrial manufacturing. GD&T is recognized around the world as the only way of defining engineering drawings and CAD models efficiently and unambiguously. But the unfortunate reality is that most of the workforce that engages with mechanical drawings has an adequate understanding of this language. Many individuals and organizations get by for some time before costly or otherwise painful experiences convince them they need to improve their skills in use of GD&T.
The truth is that properly applied at the earliest stages of a product development project, GD&T can establish robust product quality, save months of development time, tens even hundreds of thousands of euros, and potentially millions over the lifecycle of a product.
GD&T training has real benefits: lower costs, less non‐conforming parts, higher tolerances.
InQuality, authorized partner of HEXAGON MI, offers on‐site and on‐line GD&T training courses.
Based on the latest ISO & ASME standards, our courses are tailor‐made to fully cover your particular needs.

The course is delivered as an intensive, two‐day programme that focuses on understanding of the fundamental elements, rules and concepts of mechanical engineering drawing as defined in current ISO‐ TPD (Technical Product Documentation) set of standards. Participants will learn about the rules of drawing views presentation, line‐types, section views, dimensions, tolerances, surface finish and other common drawing symbols in order to be able to understand and interpret mechanical engineering drawings from a practical point‐of‐view, find out the pitfalls, ambiguities and misconceptions that rely on the drawings interpretation and gain confidence on how they will be able to overcome them. This highly‐interactive course includes extensive classroom discussions, team exercises and problem‐solving sessions. Examples of drawings or components from the client, where available, are used in order to illustrate the course material. Customization of the course to specific participant needs can be discussed. To maximize the effectiveness of the training, an upper limit to the class size of 10 delegates is recommended.
Please note that topics like geometrical tolerancing and surface texture specification are only covered in very broad outline, and not in sufficient detail to go into the application and interpretation of these requirements (more extensive courses are available for clients who need to cover these in more detail)

Anyone who creates, reads or edits mechanical part drawings and models.

• Introduction to the graphic universal language of mechanical engineering drawing
  • importance and different types of technical drawing, rules and standards for mechanical
  • engineering drawing – Technical Product Documentation (ISO‐TPD, EN, DIN, ASME, corporate etc.)
• Mechanical drawing layout
  • the three “drawing layers”, drawing scales, title blocks, parts list, typical notes on drawings, other
  • types of technical data on mechanical drawings, 2D vs. 3D drawing, 3D‐CAD Model Based
  • Annotation (MBD) (as per ISO 16792:2021) and 3D‐PMI
• Views and Orthographic projection
  • representation of a projected mechanical component, projection plane, systems of arrangement for the six basic views (ISO‐E and ISO‐A), auxiliary and partial views, detail views, section views and type of section, section rules, conventional section practices
• Dimensioning principles
  • feature types, dimension elements, rules for dimensioning on mechanical drawings, the importance
    of functional dimensioning, dimensioning for manufacture and dimensioning for inspection
• Drawing representation of standardized Machine Elements
  • fasteners types, thread characteristics, thread drawing appearance, drawing bolt, nuts, washers,
    pins, rivets, keys and keyways, springs, shafts and bearings, retaining rings
    gears terminology, types of gears, simplified representation of gears
• Surface texture indication on mechanical drawings
  • surface texture symbols and characteristics, past practices, the new ISO 1302:2022 and ISO 21920‐ 1:2021 standards for surface texture, surface texture inspection basics
• Symbolic representation of welded joints on mechanical drawings
  • welding terminology, welding types and symbols as per ISO 2553:2019, dimensioning of welds and of joint preparations, overview of ASME and AWS standards on welding, examples of effective use of symbols on welded constructions
• Indication and dimensioning of edges as per ISO 13715:2017
• Assembly drawings, identification numbers, parts list, bill of materials (BOM), standardized/purchase parts
• Introduction to dimensional and geometrical tolerancing
  • axiom of manufacturing imprecision, interchangeability in industry, the role of standardization, tolerance expression, terminology, limits of size, limits and fits as per ISO 286:2010
• General tolerances
  • general tolerances as per ISO 2768‐1 and ISO 2768‐2, ISO 2768 vs. DIN 7168, ISO 22081:2021: the new standard on general geometrical specifications and general size specifications
• What is Geometrical Tolerancing?
  • benefits and advantages of Geometrical Tolerancing
  • major pitfalls of traditional tolerancing and how to overcome them
• The concept of Features and Features‐of‐Size (ISO 17450‐3:2016)
• Linear and angular size tolerances clarified
  • ISO 14405‐1:2016, ISO 14405‐2:2018 and ISO 14405‐3:2016, Size vs. Form: the Envelope Requirement
• The elements of Geometrical Tolerancing – ISO GPS system and Standards
  • datum and datum systems (as per ISO 5459:2011 and ISO/DIS 5459.2:2017)
  • what is a datum and why is it needed? datum vs. datum feature, indicating datums on drawings geometrical tolerance frames, symbols and modifiers, tolerance frame on drawings tolerance characteristics – interrelationships (what do they really control? – ISO 1101:2017), tolerances of form, orientation, location, runout and profile ( ISO 1660:2017)