Engineering drawing


Also found in: Wikipedia.

Engineering drawing

A graphical language used by engineers and other technical personnel associated with the engineering profession. The purpose of engineering drawing is to convey graphically the ideas and information necessary for the construction or analysis of machines, structures, or systems. See Computer graphics, Drafting, Schematic drawing

The basis for much engineering drawing is orthographic representation (projection). Objects are depicted by front, top, side, auxiliary, or oblique views, or combinations of these. The complexity of an object determines the number of views shown. At times, pictorial views are shown. See Pictorial drawing

Engineering drawings often include such features as various types of lines, dimensions, lettered notes, sectional views, and symbols. They may be in the form of carefully planned and checked mechanical drawings, or they may be freehand sketches. Usually a sketch precedes the mechanical drawing.

Many objects have complicated interior details which cannot be clearly shown by means of front, top, side, or pictorial views. Section views enable the engineer or detailer to show the interior detail in such cases. Features of section drawings are cutting-plane symbols, which show where imaginary cutting planes are passed to produce the sections, and section-lining (sometimes called cross-hatching), which appears in the section view on all portions that have been in contact with the cutting plane.

In addition to describing the shape of objects, many drawings must show dimensions, so that workers can build the structure or fabricate parts that will fit together. This is accomplished by placing the required values (measurements) along dimension lines (usually outside the outlines of the object) and by giving additional information in the form of notes which are referenced to the parts in question by angled lines called leaders.

Layout drawings of different types are used in different manufacturing fields for various purposes. One is the plant layout drawing, in which the outline of the building, work areas, aisles, and individual items of equipment are all drawn to scale. Another type of layout, or preliminary assembly, drawing is the design layout, which establishes the position and clearance of parts of an assembly.

A set of working drawings usually includes detail drawings of all parts and an assembly drawing of the complete unit. Assembly drawings vary somewhat in character according to their use, as design assemblies or layouts; working drawing assemblies; general assemblies; installation assemblies; and check assemblies.

Schematic or diagrammatic drawings make use of standard symbols which indicate the direction of flow. In piping and electrical schematic diagrams, symbols are used. The fixtures or components are not labeled in most schematics because the readers usually know what the symbols represent. See Schematic drawing

Structural drawings include design and working drawings for structures such as building, bridges, dams, tanks, and highways. Such drawings form the basis of legal contracts. Structural drawings embody the same principles as do other engineering drawings, but use terminology and dimensioning techiques different from thoses shown in previous illustrations.

References in periodicals archive ?
The consultant will prepare the engineering drawing and design for the new buildings which are included in the mega project.
According to the advisor planning and development of Sindh University Sajid Qayoom Memon, the tender for the engineering drawing and designs of mega projects approved by HEC for Sindh University was invited from the pre-qualified bidders and on the lowest bid, the contract has been assigned to M/S Atif Nazir as consultant.
Organised by Jubilee Centre for Excellence Education, the programme comprises many educational activities on the basics of design and technology - such as teamwork, brainstorming, mental maps, engineering drawing, posters and presentations, in addition to participation in a number of scientific competitions and designing real-life projects using specialised software.
Purdue's team is deploying a BitFlow Axion-CL Camera Link frame grabber within its pod (shown in the engineering drawing) as part of a high-resolution video-based location finder.
Included are STEAM-related and 3D printing projects as well as architectural and engineering drawing projects.
Now in a fully updated and significantly expanded sixth edition, "Engineering Drawing and Design" by David A.
Often, an engineering drawing doesn't communicate shelf impact.
DURING an interview I once told a freshly graduated mechanical engineer from highly reputed university in Pakistan to create an engineering drawing of a part.
ARIZONA (CyHAN)- This engineering drawing shows the location of the arm on NASA's Curiosity rover, in addition to the arm's turret, which holds two instruments and three tools.
This guide leads readers who are new to AutoCAD through 50 exercises that add up to several complete architectural and mechanical projects, covering the entire engineering drawing process, from preparing the drawing to plotting it.
Keywords: Quality Metrics, Engineering Drawing, Inspection Criteria, Drawing Standards, Drawing Specifications.
There have been two major changes in recent years, which have affected the perception of engineering drawing as part of the initial academic qualifications of professional engineers; CEng, IEng and Eng Tech, and of Product Designers.

Full browser ?