Industrial Communication Skills PDF - Objective 2

Unit A-10 • Fundamental Industrial Communication Skills Objective 2 Recognize standard views of an object. Standard Object Views Sketches Requiring Only One View The sketch in Figure 6(a) shows an American Standard flat-head cap screw. Figure 6(b) is an American Standard button head machine bolt....

Unit A-10 • Fundamental Industrial Communication Skills Objective 2 Recognize standard views of an object. Standard Object Views Sketches Requiring Only One View The sketch in Figure 6(a) shows an American Standard flat-head cap screw. Figure 6(b) is an American Standard button head machine bolt. The dimensions are provided in SI units. One view of such simple parts is sufficient. An end view to show that the head is round is unnecessary. Figure 6 – Examples of Sketches Requiring One View Only 1.91 cm (0.75 in) 3.49 cm (1.37 in) (a) 82° 3.94 (1.55 in) Threads per cm 0.91 cm (0.36 in) 826 cm (325 in) 4.45 cm (1.75 in) 1.91 cm (0.75 in) (b) 4.45 cm (1.75 in) 3.94 (1.55 in) Threads per cm 0.95 cm (0.37 in) 826 cm (325 in) 4.45 cm (1.75 in) Sketches Requiring Two or More Views The bracket shown in Figure 7 requires three views to represent its shape. The top (or plan) view shows the circular form of the pad (or raised part) on the top of the bracket. The end view, at the right, shows the shape of the back plate, the width and shape of the central stiffening rib, and the exact locations of the bolt-holes. The front view shows the slope of the stiffening rib and the thickness of the raised pad. If any of the three views is missing, the sketch becomes incomplete; there will be insufficient information to construct the bracket as required. 1-8 4th Class Edition 3 • Part A Energy Plant Sketching • Chapter 1 Figure 7 – Sketch of a Bracket Requiring Three Views to Show Its Form 16 7 8 1 5 3 3½ TOP (or PLAN) VIEW 3 FRONT VIEW ½ 1¼ END VIEW ¾ 2 Standard Views Figure 8 illustrates the standard views used in engineering drawing practice. Six views are shown, but there are rarely more than three used. The three most commonly used include: • Front Elevation • Plan (or top view) • One Side Elevation Figure 8 – Six Views of a House 4th Class Edition 3 • Part A 1-9 Unit A-10 • Fundamental Industrial Communication Skills Figure 9 gives further illustration of the six standard views. Note that the front elevation is usually used as the key view. The remaining views are projected from this one. TOP Figure 9 – Six Views DEPTH WIDTH TOP RS HEIGHT BOTTOM (a) REAR L SIDE WIDTH DEPTH F R SIDE FRONT DEPTH DEPTH (b) BOTTOM In each case, the name of the view shows the object as it appears when viewed from the stated direction. For example, the right side view shows the appearance of the object when viewed from the right side, and so on. 1-10 4th Class Edition 3 • Part A