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Technical Drawing

Technical Drawing. UMAMS Design and Engineering B-211 – Tech Lab Mr. Cullen. Introduction. The entire world depends upon technical drawings to convey the ideas that feed today’s industrialized society.  

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Technical Drawing

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  1. Technical Drawing UMAMS Design and Engineering B-211 – Tech Lab Mr. Cullen

  2. Introduction • The entire world depends upon technical drawings to convey the ideas that feed today’s industrialized society.   • Architectural, structural, electric, electronic, machine, plumbing, and piping drawings are all forms of mechanical/technical drawings. • When rendering technical drawings, accuracy, neatness, technique, and speed in execution are essential. • Inaccurate drawings could be worthless or lead to costly errors.

  3. Technical Drawing • Technical drawingis a necessarily broad term that applies to any drawing used to express technical ideas. • Technical drawings are usually mechanically sketches refined by using straightedges, triangles, and drafting instruments. Drawings are now often completed used Computer Aided Drafting software. Many of these drawings begin as a form of sketching.   

  4. Technical Sketching • Technical sketchingis a freehand sketch. The only equipment required to execute technical sketches are soft pencils, paper, and eraser. • The novice sketcher may find paper that is cross sectioned with ruled lines beneficial in establishing and maintaining scale.   • There are gridded papers, isometric  papers  for isometric sketches, and perspective papers for sketches requiring perspective available.   • When  selecting  an  eraser,  chose  a  soft or  artgum  eraser.

  5. Types of Sketches • Types ofsketches Since technical sketches and drawings represent three-dimensional objects, your sketches should conform to one of the four standard types of projection. The four major types of projection are • (1) multiview – 3 view 2-D drawing • (2) axonometric – pictorial 3-D drawing • (3) oblique – pictorial 3-D drawing • (4) perspective   – pictorial 3-D drawing   

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