How To Draw Orthographic Views In AutoCAD | AutoCAD Orthographic Views

Points to be borne in mind while drawing orthographic projections from pictorial views:

1. Since the pictorial view shows the object as it appears to the observer from one direction only, it may not clearly show the hidden parts, constructional details and the real shapes of its structures. All these have to be imagined before making the orthographic views

2. If a portion of a symmetrical object shown in the pictorial view is hidden, the same should be assumed to be similar to the corresponding visible part.

3. All holes, slots, grooves etc. should be assumed to run right through the object unless mentioned otherwise

4. If the radius of any curved portion is not specified, the same should be assumed suitably.

5. While making the views, the longest face of the object or the most informative contour may in general be treated as the front. The other views are placed depending on the orientation of the front view

6. It is not necessary that one view must be completed before proceeding to the other. The views are to be carried along together

7. Unless otherwise specified; front, top, and right side views should be selected for the description of models and pictures

8. An intersection of two surfaces, edges of surfaces and the surface limits should be shown by using full lines while the hidden features are to be shown by dashed lines

9. Each view must contain all the lines of the object, both visible and hidden. The centre lines of holes, cylindrical parts of objects must be clearly indicated. The centre of a circle is shown as the intersection of two mutually perpendicular centre lines. For parts with an axis, such as a cylinder or a cone, the axis is drawn as the centre line.

10. If a hidden edge coincides with a visible edge, draw the full line. When a centre line coincides with a hidden edge, draw a dashed line. Thus, give consideration to the precedence of lines

11. In orthographic views, a surface may appear as an area or as a line. An edge may appear as a line or as a point.

Orthographic Drawing Practice Problems 1:

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Orthographic Drawing Practice Problem Solution 1:

01 - Orthographic Projection Using Autocad

Orthographic Drawing Practice Problems 2:

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Orthographic Drawing Practice Problem Solution 2:

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Orthographic Drawing Practice Problems 3:

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AutoCAD Orthographic Drawing Exercises | Isometric To Orthographic Drawing Exercises

AutoCAD orthographic Views:

Steps in drawing orthographic views from pictorial views:

1. Study the given pictorial sketch or object carefully following the principles of orthographic projection

2. Prepare sketches of the required orthographic views from the picture or object or model before scale drawing is started

3. Make a preliminary measuring and determine the space required for the chosen combination of views

4. Select a suitable scale if necessary

5. Space the views and block out the spaces for the views

6. Draw centre lines of symmetrical parts like cylinder and centres of circles if visible

7. Build up the details in each view starting with the most characteristics shape and then proceeding to minor details. Carry the views along together and do not attempt to finish one view before taking up another. Keep the construction lines minimum and draw the lines to finished thickness, if possible.

Note: it is not possible to draw the top and side views directly. The depth measurements are relocated from one point to the other point. Mitre lines is sometimes used to transfer the measurements. Mitre line is a 45 degree line drawn through the points of intersection of the top and side views of the front edge. Use of a mitre line is not recommended since it takes more time and requires great care.

8. Check whether all the hidden features are shown in the drawing by dashed lines

9. Erase the extra construction lines after drawing the required views

10. Complete the dimensioning including the titles and notes

11. Check the drawing for accuracy and ascertain that it is complete in all respects.

Orthographic Drawing Practice 1:

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Isometric To Orthographic Drawing Exercises Answer 1:

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Orthographic Drawing Practice 2:

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Isometric To Orthographic Drawing Exercises Answer 2:

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Orthographic Drawing Practice 3:

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Isometric To Orthographic Drawing Exercises Answer 3:

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