3-24.). On large, complex views or when the cutting planes are offset, they should be shown as in figure 3-39. To make sure everyone interprets drawings the same way, the use of each type and thickness of lines is defined in Australian Standard 1100 Drawing Practice. Most CAD Software packages will have these different line types predefined as layers. VIEWING PLANE LINES are used to indicate the plane or planes from which a surface or several surfaces are viewed. 3-27 Correct and Incorrect Procedures for Drawing Adjoining Hidden Lines, Extension lines are used to extend dimensions beyond the outline of a view so that they can be read easily. The arrows point in the direction in which you are to look at the sectional view. The part in one position is drawn in full lines, while in the alternate position it is drawn in phantomlines.Phantom lines are also used to indicate a breakwhen the nature of the object makes the use of the conventional type of break unfeasible. However, a reference to a surface terminates with a dot within the outline of that surface. Stitch lines are used to indicate the stitching or sewing lines on an article. In this highly interactive object, learners associate basic line types and terms with engineering drawing geometry. Technical drawing is a form of design communication based on line symbols recognized and understood worldwide. The visible edge lines of the view are drawn as solid, thick lines. Architecture Symbols Different Types Of Lines Math Formulas Broken Heart Quotes Electrical Engineering Design Process Nitish Kumar Durga Visual Arts. Drawing board is generally made of soft wood and it is in rectangular shape. ; Horizon Line - Controls the height of the viewer's eye.This is most apparent in landscapes but can be applied to other subjects as well. as shown in the left-hand view of figure 3-36. Types of projections 1. (See fig. Orthogonal Line - Used in perspective drawing, orthogonal are the lines that reach back to and converge at the vanishing point. Cavalier Oblique Drawing. 996 0 obj <> endobj Technical Drawing Line Types. Dimension lines are used to show the extent and the direction of dimensions. 2. Construction Line. Academia.edu is a platform for academics to share research papers. MEC076 Engineering Drawing Interpretation 1 Resource Package Occasionally, when the radius of an arc is to be indicated, there is an arrow at only the end of the line that touches the arc. 3-30.). The single view in figure 3-38, view B, helps you to visualize the cutting plane. Diagonal 1. An engineering drawing is a type of technical drawing that is used to convey information about an object. The arrowhead on a dimension or leader line is an important detail of a drawing. Extension. I have amalgamated the definitions from the engineering drawing supplement and the construction drawing supplement together. A single drawing is composed of many basic elements, and different types of lines play distinct roles. In Figure. on mechanical engineering drawings; a slash, or a dot in architecture. Engineering drawings can be produced to a good professional standard if the following points are observed: a. the types of lines used must be of uniform thickness and density; b. eliminate fancy printing, shading and associated artistry; c. include on the drawing only the information which is required to ensure accurate clear communication; d. Guide Line. The thick, wavy lines shown in view (A), figure 3-34, are used for a short break. A dimension line which is a type B line (thin, continuous and straight). Sometimes the technical information conveyed by a drawing can best be shown by a view thatrepresents the object as it would look if part of it were cut away. Muhammad Umair Akram 9/1/2015 MUHAMMAD UMAIR AKRAM 1 Types of Projections Engineering Drawings “It is actually the language of lines that is used to convey the concept of design of anything from designer’s mind to the manufacturer or the reader”. Section views are used to give a clearer view of the interior or hidden feature of an object that normally cannot be clearly observed in conventional outside views. They are type G lines (thin, discontinuous, chain) which pass through the drawing just past where the holes are located. The types of scale normally used are 1 . If the cut followed one vertical line part of the way down and then was offset to a different line, it would be an offset section. Dashed lines are used to represent hidden features of an engineering drawing.. Hidden lines – location of drilled hole’s diameter, in a view where the hole cannot be directly seen. MECHANICAL ENGINEERING 22 These lines are omitted by general custom, the custom being based on the fact that the elimination of hidden lines is the basic reason for making a sectional view. For wooden rectangular sections, the breaks are made sharper (serrated appearance) rather than wavy. Types of lines include the following: • All dimension lines terminate with an . Extension lines, on the other hand, are seen simply as extensions of … July 28, 2011. Figure 3.4 Engineering drawing line types A to K (ISO 128:1982) Figure 3.4 Engineering drawing line types A to K (ISO 128:1982) leader lines, cross hatching, outlines of revolved sections, short centre lines, thread routes and symmetry ('equals') signs.. Center lines may also be used to indicate the travel of a moving center, as shown in figure 3-24. Construction Lines. Feel free to explore, study and enjoy paintings with PaintingValley.com Correct usage of this "alphabet of lines" is essential whether you use traditional drafting methods or CAD. Most CAD Software packages will have these different line types predefined as layers. As far as practical, avoid drawing extension lines directly to the outline of an object. Types of Lines in Art Drawing ... Mass gesture lines refer specifically to using a drawing instrument on its widest side. ), Hidden edge lines are drawn with short dashes and are used to show hidden features of an The Bureau of Indian Standards has prescribed the types of lines in its code IS-10714-1983 to be used for making a general engineering drawing. The methods of drawing these breaks are shown in figure 3-35. Table 1 shows the types and thickness of lines …
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