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Geometric dimensioning and tolerancing ( GD&T) is a system for defining and communicating engineering tolerances via a symbolic language on engineering drawings and computer-generated 3D models that describes a physical object's nominal geometry and the permissible variation thereof. GD&T is used to define the nominal (theoretically perfect) geometry of parts and assemblies, the allowable ...
An engineering drawing is a type of technical drawing that is used to convey information about an object. A common use is to specify the geometry necessary for the construction of a component and is called a detail drawing. Usually, a number of drawings are necessary to completely specify even a simple component.
A physical exploded view made by arranging parts of a camera. An exploded-view drawing is a type of drawing, that shows the intended assembly of mechanical or other parts. It shows all parts of the assembly and how they fit together. In mechanical systems usually the component closest to the center are assembled first, or is the main part in ...
Engineering drawing abbreviations and symbols are used to communicate and detail the characteristics of an engineering drawing. This list includes abbreviations common to the vocabulary of people who work with engineering drawings in the manufacture and inspection of parts and assemblies.
Presentation This paragraph contains examples of dimensional and geometrical specification to illustrate the definition and use of dimensional and positional specifications. The dimensions and tolerance values (displayed in blue in the figures) shall be numerical values on actual drawings. d, l1, l2 are used for length values.
Technical drawing, draftingor drawing, is the act and disciplineof composing drawingsthat visually communicatehow something functions or is constructed. Technical drawing is essential for communicating ideas in industryand engineering. To make the drawings easier to understand, people use familiar symbols, perspectives, units of measurement ...
Engineering drawing – a type of technical drawing that is used to convey information about an object. Detail drawings commonly specify the dimensions and tolerances for the construction of a single component, while a master drawing or assembly drawing links the detail drawings for each component in a system.
Computer-aided design ( CAD) is the use of computers (or workstations) to aid in the creation, modification, analysis, or optimization of a design. [1] : 3 This software is used to increase the productivity of the designer, improve the quality of design, improve communications through documentation, and to create a database for manufacturing.