Engineering Drawing : Class 02
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The document discusses different aspects of engineering drawings including: 1. Common sizes for drawing paper include 8.5" x 11", 11" x 17", and 17" x 22". 2. Title blocks contain information about the drawing. 3. Scales are used to shrink or enlarge objects to fit on the drawing paper according to British standards. 4. There are vertical and sloping methods for drawing letters and numbers.
Engineering Drawing : Class 02
- 3. 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”
- 4. TITLE BLOCKSpecial columns that prepared at every drawing paper to give explaination on about drawing that drawn in the drawing paper.
- 5. Title Block
- 6. SCALEScale help us belittle something large objects or enlarge something small object fit with drawing paper when draw.
- 7. 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
- 8. Scale 1:2Refer to Drawing Size Refer to Actual Size
- 9. Scale
- 10. ALPHABET & NUMBER There is two methodologies that used in making letter and number. • vertical method • sloping method
- 11. Vertical Method
- 12. STEP Draw horizontal construction line using pencil (H)
- 13. STEP Draw second horizontal line with distance 30mm with first line. 30mm
- 14. STEP Draw vertical construction line.
- 15. STEP Draw second vertical construction line with distance 20mm from first line. 20mm
- 16. STEP Start draw your first line Alphabet HB
- 17. STEP
- 18. STEP
- 19. STEP Draw vertical construction line with distance 5mm using Pencil (H) 5mm
- 20. STEP Draw vertical construction line with distance 20mm using Pencil (H) 20mm
- 21. PRACTICAL TASK 1 Draw Alphabet from A-Z and Number 0-9 vertical method
- 22. Sloping Method
- 23. STEP Draw horizontal construction line using pencil (H)
- 24. STEP Draw second horizontal line with distance 30mm with first line. 30mm
- 25. STEP Draw an angle construction line using set square 60°. 60°
- 26. STEP Draw second angle construction line with distance 20mm from first line. 20mm
- 27. STEP Start draw your first line Alphabet HB
- 28. STEP
- 29. STEP
- 30. STEP 5mm Draw vertical construction line with distance 5mm using Pencil (H)
- 31. STEP Draw vertical construction line with distance 20mm using Pencil (H) 20mm
- 32. PRACTICAL TASK 1 Draw Alphabet from A-Z and Number 0-9 vertical method
- 33. DISTANCETo avoid occurrence of word mixture that complicate reader to read.
- 34. Distance
- 36. Types of Lines • OBJECT LINE • CENTER LINE • CENTER MARK • HIDDEN LINE • PHANTOM LINE • BREAK LINE • CUTTING PLANE LINE • VIEWING PLANE LINE • SECTION LINE
- 37. 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.
- 38. OBJECT LINE
- 39. 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.
- 40. CENTER LINE
- 41. CENTER MARK • Center mark are use to represent the center points of a radius (arc) or circle. • These marks appear as small crosses at the center point of a radius or circle.
- 42. CENTER MARK
- 43. 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.
- 44. HIDDEN LINE
- 45. 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.
- 46. PHANTOM LINE
- 47. 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.
- 48. BREAK LINE
- 49. 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.
- 51. 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.
- 53. 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.
- 54. SECTION LINE