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What is Engineering Drawing and Instrument Of Engineering Drawing
 

What is Engineering Drawing and Instrument Of Engineering Drawing

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Describe what is engineering drawing and Engineering Drawing Tools

Describe what is engineering drawing and Engineering Drawing Tools

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    What is Engineering Drawing and Instrument Of Engineering Drawing What is Engineering Drawing and Instrument Of Engineering Drawing Presentation Transcript

    • JJ101 ENGINEERING DRAWING Class 01
    • WHAT IS ENGINEERING DRAWING ??
    • • An engineering drawing is a document that communicates a precise description of a part. • This description consists of pictures, words, numbers and symbols. • Together, these elements communicate part information to all drawing users.
    • • In the past most engineering drawings were created by manual methods. • Tools like drawing boards, T-squares, compasses, triangles, etc. were used. • The original drawing was created on paper, vellum or Mylar that could be used for making blueprints.
    • Today ….
    • • Engineers created drawings using a computer. • The designer creates an electronic version of a drawing. • The original drawing is a computer file. • Copies are made on a printer or plotter.
    • • Whether engineering drawings are manual drawings or computer generated their purpose remains the same: • To record and communicate design information.
    • Type Of ENGINEERING DRAWING ??
    • • Geometrical Drawing • Mechanical Engineering Drawing • Civil Engineering Drawing • Electrical Engineering Drawing
    • Geometrical Drawing • The art representation of geometrical objects such as rectangular, square, cube, cone, cylinder, sphere, etc. on a paper
    • Geometrical Drawing
    • Mechanical Engineering Drawing • The art representation of mechanical engineering object such as mashines, machine parts, etcs. on a paper.
    • Mechanical Engineering Drawing
    • Civil Engineering Drawing • The art representation of civil engineering object such as roads, buildings, bridges, dams, etcs. on a paper
    • Civil Engineering Drawing
    • Electrical Engineering Drawing • The art representation of electrical engineering object such as motors, generators, transfomers, poles, towers, wiring diagrams, etcs. on a paper
    • Electrical Engineering Drawing
    • ENGINEERING DRAWING Instrument
    • Drawing Board • Drawing Board Size : 60cm x 80cm.
    • Drawing Board
    • Drawing Board
    • Drawing Table
    • Drawing Paper • ANSI standard measure (American National Standard Institute) for drawing paper was as follows: • A. 8.5” x 11” A. 9” x 12” • B. 11” x 17” B. 12” x 15” • C. 17” x 22” C. 18” x 24” • D. 22” x 34” D. 24” x 36” • E. 34” x 44” E. 36” x 48”
    • T-Square • Divided into two principal divisions namely – head portion – blade part • Driver to draw vertical line and horizontal straight lines with using set square. • During T angle's usage, it used close with left board
    • T-Square
    • T-Square
    • Compass • Used to form a circle line or arc. • Consisting of two sticks that the one end could be met and can be adjusted. • One end contain trick to be put on-centred something circle, or arc and end that another is pencil to draw line.
    • Compass
    • Divider • Nearly identical with compass, the difference divider have two needle points. • Divider used to divide something distance to several same division too or to move something distance once or repeat.
    • Divider
    • Protractor • To get point of angle or to measure the angle
    • Set square • To get point of angle or to measure the angle • Set square can give some degree of angle.
    • Set square
    • Set square
    • Scale / Measure • Not for making line, but only used as measure tool only. • Scale that used must be in a unit only to avoid confusion or mistake when making measurement. • After we get some measure, pencil used as marker to that measure. • More accurate marking can be gained by using divider or compass.
    • Scale / Measure
    • French Curve • Used to draw accurate line that could not be drawn with compass. • Have many type of shape.
    • French Curve
    • Flexible French Curve
    • Pencil • Drawing Pencils is the most important tool used in engineering drawing.
    • Pencil • Drawing Pencils are made in different grades.
    • Pencil • The "HB" grade pencil is medium soft and dark in black colour, whereas 1H, 2H, grade pencils hard and light in black colour.
    • Pencil • "HB" Pencil is used for free hand works. Thin and light lines drawn by 1H & 2H pencils.
    • Mechanical Pencils • Size : 0.3, 0.5, 0.7, 0.9
    • Eraser • Used to erase line that draw by pencil. • High quality eraser required : to avoid line that erase not leave effect to drawing paper surface.
    • Eraser Shield