1. Applying the basics of technical drawing
Line Drawing

2. Learning Objectives Students are expected to draw a line.
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3. Line Drawing
Line Drawing Drawing a straight line using a ruler triangle:
Put the triangle hypotenuse 45 degrees - 45 degrees such that coincides with the known line 1 and the bottom of the triangle held by others.
Rotate the triangle 45 degrees - 45 degrees by 90 degrees (see arrow B) then the hypotenuse will be perpendicular to the line. Drag the triangles (see arrows B) if necessary pull the line m
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4. How to Draw Straight Line Portrait
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5. How to Draw Straight Lines
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6. How to Draw Line Slopes
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7. Drawing Parallel Lines
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8. Line Drawing Curves
To create a curved line using the term must be determined before the radius of a circle or round center circle. For example the radius of the circle center of M1 is greater than the radius of the circle M2
Create a central axis line of rotation curves M1 and M2 as large fingers.
Make a half circle with a central term in M2, then it is place-related curve. See next picture
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9. Line Drawing Curves
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10. Specify any point A, B, C, D and E
Find mall in accordance with the curved arch 3 points A, B and C.
Find more malls are in accordance with the curved arch C, D and E
Apparently the curve for A, B, C, D and E are not aligned So arch C, D and E cancel
Use the arch to mall points C and D only, but the estimated arc connecting or so one
And finally make the curve from point D and E to connect the next curve of the mall looking for a suitable The results of the pull curve can be seen in the following figure.
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12. Line AB is divided into two equal length sections
Dividing Line
Line AB is divided into two equal length sections
Create two circular arcs with A and B as the center, the radius R arbitrary. The two arcs intersect in a and b Pull the line AB intersecting ab at C
Then AC = CB
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14. Divide the line AB into parts of equal length.
(for example, is divided into 8 parts)
Pull any lines (from A)
The size of the lines of the same ah long-term wearing aa = ab = bc = cd = de = ef = fg = gh
Connect the points with B h
Pull of the points: g, f, e, d, c, b, a, a line parallel to the line HB lines will be cut AB at the points split in 8 parts of equal length.
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16. Combining Line
To combine a straight line with a straight line to get attention is no extra lines or cross cutting, it must be right.
Pull the line from point a to point B, then proceed from point to point B to C and so on from point C to point D Line ABCD join.
Do not combine incompatible lines because of possible results would be less good. For example from A to B and from D to C onwards from B to C
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18. Create a semicircular curve of M1 center from point A to point B
Meanwhile, combine curves and straight lines should be starting from the first curve.
Create a semicircular curve of M1 center from point A to point B
Forward draw a straight line from point B to point C.
And so on for half an M2 center circle from point C to point D
Remember do not make lines that are not consecutive, the result will be less good.
For example created a large semicircle M1 center from point A to point B, then a half circle from the M2 center point D to point C and so on to make a line from point B to point C
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20. b. Drawing many kinds of Shading Stating a line that looks / looked at an object Dashed line (about ½ thick line drawings) stated line that looks at the back of the piece or not visible due to blocked Line end-point (approximately 1 / 3 thick line drawings) As the axis line Stating a piece (plus a letter to the tip and the base of this line) Limit the painting, if the Part-painted objects discarded
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22. c. Drawing the various symbols
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23. kinds of material symbols
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27. Thank you
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