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Lecture #5 RES 112E – COMPUTER AIDED TECHNICAL DRAWING ITU SECTION VIEW.

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Presentation on theme: "Lecture #5 RES 112E – COMPUTER AIDED TECHNICAL DRAWING ITU SECTION VIEW."— Presentation transcript:

1 Lecture #5 RES 112E – COMPUTER AIDED TECHNICAL DRAWING ITU SECTION VIEW

2 This week You will learn creating sectional views. The steps to follow are: ◦Cutting plane ◦Kind of section views (full, half, etc.) ◦Section line symbols ◦Conventional practice ◦Assembly sections ◦Creating section views in AutoCAD ◦Assignment # 4 RES 112E – COMPUTER AIDED TECHNICAL DRAWING ITU

3 Principles CREATING SECTIONS RES 112E – COMPUTER AIDED TECHNICAL DRAWING ITU

4 Sectional views are usually produced RES 112E – COMPUTER AIDED TECHNICAL DRAWING ITU To clarify details of the object To show the shape of the cross-section To facilitate the dimensioning of internal features To reduce the number of hidden detail lines To illustrate internal features clearly To show clearly the relative positions of forming an assembly

5 Sectional views RES 112E – COMPUTER AIDED TECHNICAL DRAWING ITU Newly visible edges cut by cutting plane are crosshatched with section lining.

6 Cutting plane RES 112E – COMPUTER AIDED TECHNICAL DRAWING ITU Cutting plane is a plane that imaginarily cuts the object to reveal the internal features. Cutting plane Cutting plane line Section lines

7 Cutting plane line RES 112E – COMPUTER AIDED TECHNICAL DRAWING ITU Cutting plane line is an edge view of the cutting plane. Indicate the path of cutting plane.

8 Cutting plane line RES 112E – COMPUTER AIDED TECHNICAL DRAWING ITU TS & ISO standard Center line Viewing direction This course

9 Cutting plane line RES 112E – COMPUTER AIDED TECHNICAL DRAWING ITU ANSI standard Thick line Viewing direction Viewing direction

10 Labeling cutting plane RES 112E – COMPUTER AIDED TECHNICAL DRAWING ITU Note that each section (A-A and B-B) is completely independent.

11 Visualizing cutting plane RES 112E – COMPUTER AIDED TECHNICAL DRAWING ITU

12 Principles KIND OF SECTIONS RES 112E – COMPUTER AIDED TECHNICAL DRAWING ITU

13 Kind of sections RES 112E – COMPUTER AIDED TECHNICAL DRAWING ITU 1. Full section 2. Offset section 3. Half section 4. Broken-out section 5. Revolved section (aligned section) 6. Removed section (detailed section) 7. Aligned section

14 Kind of sections RES 112E – COMPUTER AIDED TECHNICAL DRAWING ITU Revolved section Aligned section Offset section Broken-out

15 Offset section view RES 112E – COMPUTER AIDED TECHNICAL DRAWING ITU The view is made by passing the bended cutting plane completely through the part. Do not show the edge views of the cutting plane.

16 Broken-out section view RES 112E – COMPUTER AIDED TECHNICAL DRAWING ITU The view is made by passing the cutting plane normal to the viewing direction and removing the portion of an object in front of it.

17 Broken-out section view RES 112E – COMPUTER AIDED TECHNICAL DRAWING ITU A break line is used to separate the sectioned portion from the unsectioned portion of the view. There is no cutting plane line. Break line is a thin continuous line (0.25) and is drawn freehand.

18 Principles SECTION LINING RES 112E – COMPUTER AIDED TECHNICAL DRAWING ITU

19 Section line symbols RES 112E – COMPUTER AIDED TECHNICAL DRAWING ITU  Uniformly spaced by an interval of about 2.5 mm  Not too close together  Uniformly thin, not varying in thickness  Distinctly thinner than visible lines  Neither running beyond or not stopping short of visible outline

20 Section line symbols The section lines are different for each of material’s type. Cast iron, Malleable iron Steel Concrete Sand Wood For practical purpose, the cast iron symbol is used most often for any materials. RES 112E – COMPUTER AIDED TECHNICAL DRAWING ITU

21 Section line symbols RES 112E – COMPUTER AIDED TECHNICAL DRAWING ITU

22 Rules of lines in section view RES 112E – COMPUTER AIDED TECHNICAL DRAWING ITU

23 Principles CONVENTIONAL PRACTICE RES 112E – COMPUTER AIDED TECHNICAL DRAWING ITU

24 Conventional Practice RES 112E – COMPUTER AIDED TECHNICAL DRAWING ITU There are some exceptions to the general rules of sectioning:  Webs, ribs, lugs, spokes,  Shafts, rods, spindles,  Bolts, nuts and thin washers.  Rivets, dowels, pins and cotters.

25 Terminology RES 112E – COMPUTER AIDED TECHNICAL DRAWING ITU Rib and Web are thin, flat feature of an object that acts as a structural support. Rib

26 Terminology RES 112E – COMPUTER AIDED TECHNICAL DRAWING ITU A web or rib is a strengthining or supporting part of a component. Web

27 Terminology Rim Spoke is the rod radiating from the hub to the rim of a wheel. Spoke Rim Hub RES 112E – COMPUTER AIDED TECHNICAL DRAWING ITU

28 Terminology RES 112E – COMPUTER AIDED TECHNICAL DRAWING ITU Lug is an ear which is built as portion of an object for attachment.

29 Rib in sections RES 112E – COMPUTER AIDED TECHNICAL DRAWING ITU

30 Lug in sections RES 112E – COMPUTER AIDED TECHNICAL DRAWING ITU

31 Treatment of web & spoke RES 112E – COMPUTER AIDED TECHNICAL DRAWING ITU

32 Assembly section RES 112E – COMPUTER AIDED TECHNICAL DRAWING ITU  Views show how the parts fit together  Individual components are identified by the use of numbers  Adjacent components are hatched with a different properties (angle or scale)  Standard components such as bolts, nuts are not hatched

33 Assembly section RES 112E – COMPUTER AIDED TECHNICAL DRAWING ITU

34 Principles CREATING SECTION VIEW IN AUTOCAD RES 112E – COMPUTER AIDED TECHNICAL DRAWING ITU

35 RES 112E – COMPUTER AIDED TECHNICAL DRAWING ITU HATCH command From icon menu

36 RES 112E – COMPUTER AIDED TECHNICAL DRAWING ITU

37 RES 112E – COMPUTER AIDED TECHNICAL DRAWING ITU

38 RES 112E – COMPUTER AIDED TECHNICAL DRAWING ITU

39 RES 112E – COMPUTER AIDED TECHNICAL DRAWING ITU

40 RES 112E – COMPUTER AIDED TECHNICAL DRAWING ITU

41 RES 112E – COMPUTER AIDED TECHNICAL DRAWING ITU

42 RES 112E – COMPUTER AIDED TECHNICAL DRAWING ITU GRADIENT command From icon menu

43 RES 112E – COMPUTER AIDED TECHNICAL DRAWING ITU

44 RES 112E – COMPUTER AIDED TECHNICAL DRAWING ITU MIDTERM EXAM #1 HOMEWORK #1 SUBMISSION The following week

45 RES 112E – COMPUTER AIDED TECHNICAL DRAWING ITU Assignment #4 222Page 7.57Figure You will sketch and complete views Submit the assignment on time Upload file into NINOVA


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