Transcript
DJJ1012ENGINEERING DRAWING
Class 02
Suhaimi Said (PKS)
DRAWING PAPER Size..
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Drawing Paper
• ANSI standard measure for drawing paper was as follows:
• A. 8.5” x 11”
• B. 11” x 17”
• C. 17” x 22”
• D. 22” x 34”
• E. 34” x 44”
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TITLE BLOCKSpecial columns that prepared at every drawing
paper to give explaination on about drawing that drawn in the drawing paper.
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Title Block
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SCALEScale help us belittle something large objects or enlarge something small object fit with drawing
paper when draw.
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Scale
• Following is scale rate according to BS standard ( British Standard):Full Size (1:1)
Size Reduce 1 : 2 1 : 20 1 : 200
1 : 5 1 : 50 1 : 500
1 : 10 1 : 100 1 : 1000
Size Enlarge 2 : 1 20 : 1 200 : 1
5 : 1 50 : 1 500 : 1
10 : 1 100 : 1 1000 : 1
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Scale
1:2Refer to Drawing Size
Refer to Actual Size
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Scale
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ALPHABET & NUMBERThere is two methodologies that used in making letter and number.
• vertical method• sloping method
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Vertical Method
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STEP
Draw horizontal construction line using pencil (H)
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STEP
Draw second horizontal line with distance 30mm with first line.
30mm
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STEP
Draw vertical construction line.
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STEP
Draw second vertical construction line with distance 20mm from first line.
20mm
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STEP
Start draw your first line Alphabet HB
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STEP
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STEP
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STEP
Draw vertical construction line with distance 5mm using Pencil (H)
5mm
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STEP
Draw vertical construction line with distance 20mm using Pencil (H)
20mm
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PRACTICAL TASK 1
Draw Alphabet from A-Z and Number 0-9 vertical method
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Sloping Method
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STEP
Draw horizontal construction line using pencil (H)
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STEP
Draw second horizontal line with distance 30mm with first line.
30mm
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STEP
Draw an angle construction line using set square 60°.
60°
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STEP
Draw second angle construction line with distance 20mm from first line.
20mm
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STEP
Start draw your first line Alphabet HB
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STEP
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STEP
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STEP
5mm
Draw vertical construction line with distance 5mm using Pencil (H)
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STEP
Draw vertical construction line with distance 20mm using Pencil (H)
20mm
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PRACTICAL TASK 1
Draw Alphabet from A-Z and Number 0-9 vertical method
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DISTANCETo avoid occurrence of word mixture that
complicate reader to read.
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Distance
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Types Of Lineshttp://www.wisc-online.com/Objects/ViewObject.aspx?ID=eng16004
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Types of Lines
• OBJECT LINE
• CENTER LINE
• CENTER MARK
• HIDDEN LINE
• PHANTOM LINE
• BREAK LINE
• CUTTING PLANE LINE
• VIEWING PLANE LINE
• SECTION LINE
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OBJECT LINE
• Object or visible lines are used to represent the outline contour of the object being drawn.
• These line appear as thick, continues line.
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OBJECT LINE
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CENTER LINE
• Center lines are use to represent the center of round cylindrical features, or symmetry of a feature.
• These lines appear as thin width lines with alternating long and short dashes.
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CENTER LINE
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CENTER MARK
• Center mark are use to represent the centerpoints of a radius (arc) or circle.
• These marks appear as small crosses at the center point of a radius or circle.
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CENTER MARK
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HIDDEN LINE
• Hidden lines represent edges and outlines that are invisible features of an object in a particular view .
• These lines appear as thin-width lines with short dashes.
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HIDDEN LINE
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PHANTOM LINE
• Phantom lines represent the outline of an adjacent part, show alternate positions of a moving part, or replace repetitive details such as gear teeth and threads.
• These lines appear as thin-width lines with two short dashes between single long dashes.
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PHANTOM LINE
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BREAK LINE
• Break lines represent an area of an object that has been removed for clarity or convenience
• Short break lines appear as short lines within the object, and long break lines appear as longer lines that represent a larger portion of an object that was removed to shorten the view.
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BREAK LINE
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CUTTING PLANE LINE
• Cutting Plane Line represent an imaginary cut through a part to show a cross section.
• These lines may be a series of long dashes or two short dashes between a pair of long dashes.
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CUTTING PLANE LINE
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VIEWING PLANE LINE
• Viewing Plane Line represent the direction of sight used to view a particular feature.
• These lines may be a series of long dashes or two short dashes between a pair of long dashes.
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VIEWING PLANE LINE
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SECTION LINE
• Viewing Plane Line are used to show where material has been cut away in a section view. A cutting plane line or break lines may be use to exposed the material.
• These lines are drawn using different patterns to designate various type of materials.
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SECTION LINE
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