long. By using a break, you can reduce the length of the figure to a feasible length, as shown in figure 3-34. The lower view is a section, showing the pipe sleeve as it would look, viewed from one side, if it were cut exactly in half vertically. The single view in figure 3-38, view B, helps you to visualize the cutting plane. Out of these, the cookies that are categorized as necessary are stored on your browser as they are essential for the working of basic functionalities of the website. Abbreviations can vary among the different trades, as, for example, QT can mean "quarry tile" or "quart." 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. These have been adopted as a standard … From any suitable portion of the reference, note, or number, To prevent confusion in the interpretation of hidden edge lines, you must apply certain standard techniques in drawing these lines. The upper view of figure 3-37 shows a plan view of a pipe sleeve. The size of the graphic representation of an object is often reduced (usually for the purpose Made in Memphis – Manufacturing Industry Survey Report & Recommendations, Creative Commons Attribution-ShareAlike 3.0 Unported License. Line conventions are different types and weights of lines used to represent the features of an object. British Standards (308, 7308). A section view is obtained by cutting away part of an object to show the shape and construction at the cutting plane. You can see that on the drawing the ratio is much larger (roughly about 1:8). These are the same lines that you used to lay out your drafting sheet. BIS specification are whenever required. For long breaks, full, ruled lines with freehand zigzags are used, as shown in view (B), figure 3-34. Structural Engineering Drawing Naming Conventions 5.A drawing set with 10 sheets must be uploaded as 10 separate files, one for each sheet. The basis of any drawing is a line. Examples of construction drawings that may require match lines are maps and road plans where the length is much greater than the width and it is impractical to reduce the size of the drawing to fit a single sheet. VIEWING PLANE LINES are used to indicate the plane or planes from which a surface or several surfaces are viewed. Engineering Drawing & Dimensioning, for Coursework projects in Design & technology. For wooden rectangular sections, the breaks are made sharper (serrated appearance) rather than wavy. Read Free Basic Engineering Drawing Conventions Once again, you are free to make up your own line definitions, but it is recommended that you put a note on the drawing with their meaning. Thick lines Center lines are composed of long and short dashes, alternately and evenly spaced, with a long dash at each end. The thread runout along the shank of the stud is indicated by a line … True Stress, Introduction to Machining & Machine Tools, Shearing, Slitting, and Punching Sheet Metal, Tool and Cutter Grinder – Operator’s Instruction Manual. CUTTING PLANE LINES are used to indicate a plane or planes in which a sectional view  is taken. •Include visible, hidden, and center lines where appropriate. A view of this kind is called a section. Adherence to a standard guarantees consistency and readability between companies or agencies. The thickness of lines are varied depending on … These include not only the outlines of the view, but lines defining edges that are visible within the view. Introduction The letters that are part of the cutting plane indication should always appear as part of the title; for example, SECTION A-A, SECTION B-B, If the single alphabet is exhausted, multiples of letters maybe used. A fundamental part of the language of engineering graphics the Phantom lines are used most frequently to indicate an alternate position of a moving part, Drawing - Conventions and Abbreviations 1 Conventions make the drawing simple and easy to draw 2 The basis of any drawing is a line The use of a right type of line results in a correct drawing 3 The thickness of lines are varied depending on whether the drawing is drawn by Basic Engineering points. They are drawn parallel to each other and perpendicular to the distance to be shown.  (See fig. Example: Line conventions in engineering drawing . of economizing on paper space) by the use of adevice called a break. Different line styles can be used to clarify the drawing by representing internal features and curvature. A very short center line may be drawn as a single dash if there is no possibility of confusing it with other lines. It is mandatory to procure user consent prior to running these cookies on your website. However, the break tells you that a considerable amount of the central part of the figure is presumed to be removed. These cookies will be stored in your browser only with your consent. The lines are thin and are usually drawn … The cutting plane may be a single continuous plane, or it may be offset if the detail can be shown to better advantage. In the United States, the predominate standard is ASME Y14.2M – Line Conventions and Lettering. Powered by  - Designed with the Hueman theme. clear, sharp, and opaque; they should have definite start and end They should extend at least one-fourth in. They consist of a series of very short dashes (medium thickness), approximately half the length of the dash of hidden lines, evenly spaced. (See fig. For wider objects, a long break might have more than one pair of zigzag lines. Engineering drawing (for engineering trades of 1 year and 2 year) and procedure of drawing/ sketching different exercise for further practice are also avaliable. 10 Conventions for arrangement of views on a TPD 12 11 Mechanical engineering drawings 15 12 Diagram 17 13 Lines, arrows and terminators 18 14 Lettering 18 15 Projections 19 16 Views 19 17 Sections 20 18 Symbols and abbreviations 20 19 Representation of features 22 20 Representation of components 22 Section 2: … 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. This margin is very important because everything inside it forms part of any contract. They are medium weight lines indicated with the words MATCH LINE and referenced to the sheet that has the corresponding match line. 3-26.). (See fig. However, lines that would be visible behind the plane projection must be included in the section view. On adjacent parts, the lines shall be drawn in opposite directions. However, a reference to a surface terminates with a dot within the outline of that surface. ASME Y14.2, Line Conventions and Lettering, was adopted on 30 September 2008 for use by the Department of Defense (DoD). Match lines are used when an object is too large to fit on a single drawing sheet and must be continued on another sheet. The other end, without an arrow, terminates at the point used as the center in drawing the arc. These lines are called section lining or cross-hatching. We'll assume you're ok with this, but you can opt-out if you wish. 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. Maybe you have knowledge that, people have search numerous times for their chosen readings like this basic engineering drawing conventions… You also have the option to opt-out of these cookies. Structural Engineering Drawing Naming Conventions Structural Engineering Drawing Naming Conventions use the Standard Naming Convention as referenced below, and the next number in the sequence. Object for exercise . partial views, half views, symbols, lettering, lines, hatching lines, etc. This manual sets forth the minimum … The thickness and form of Maximum size per file: 1 GB. Comparative Thickness/Grades of Lines. Exercise for further practice The practice exercise is given with Theory and procedure for Semester - 1 book … At intersecting points, center lines should be drawn as short dashes. We also use third-party cookies that help us analyze and understand how you use this website. The thick, wavy lines shown in view (A), figure 3-34, are used for a short break. Note that hidden lines behind the plane of projection are omitted in the sectional view. July 28, 2011. A 4H to 6H pencil with a sharp, conical point should be used. Good practice . 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. Leaders are used to connect numbers, references, or notes to the appropriate surfaces or lines on the drawing. Chapter 3 Drafting Conventions 37 side of the lead on a sandpaper block and rotating the point as you draw. The diagonal lines on the section drawing are used to indicate the area that has been theoretically cut. except when it is the continuation of an unbroken line. These cookies do not store any personal information. 3-24.). - Symbols and conventions- Engineering drawing 1----- By Trishakti Academy Figure 15.12 shows the convention for a male thread. According to DoD-STD-100C, “section lining shall be composed of uniformly spaced lines at an angle of 45 degrees to the baseline of the section. Suppose, for example, you want to make a drawing of a rectangle 1 ft wide by 100 ft long to the scale of 1/12, or 1 in. Borders and Title Blocks One of the most important features of any drawing is the border and title block. If you drew in the full length of the rectangle, you would need a sheet of paper 100 in. fundamental to your understanding of a drawing. Abbreviations for words and short phrases are often used in construction drawings. Basic Engineering Drawing Conventions The basis of any drawing is a line. The border (or margin) is a line which follows the outer edge of the drawing and is usually 10 or 20mm inside it. ManufacturingET.org is licensed under a Creative Commons Attribution-ShareAlike 3.0 Unported License. Access Free Basic Engineering Drawing Conventions Basic Engineering Drawing Conventions Thank you very much for reading basic engineering drawing conventions. Standard Drawing Conventions Revision 2.0 September 2014 1.0 Anatomy of an Engineering Drawing A generic engineering drawing can be divided into the following five major areas or parts Title block Co-ordinate grid system Revision block Notes and legends Engineering drawing (graphic portion) Any cookies that may not be particularly necessary for the website to function and is used specifically to collect user personal data via analytics, ads, other embedded contents are termed as non-necessary cookies. Know all of the line types by heart, they are Usually the first lines that you will use on a drawing are construction lines. With the exception of light lettering guidelines, all construction lines must be erased or darkened before a drawing is reproduced. The line … Thin lines The arrowheads used on Navy drawings are usually solid, or filled in, and are between one eighth and one fourth of an inch long, with the length about three times the spread. Although it was not always the case, most CAD systems today can With a little practice, you can learn to make good arrowheads freehand, Referring to figure 3-32, first define the length of the arrowhead with a short stroke as shown at A. Drawing & sectioning are essential means of communicating ideas. As far as practical, avoid drawing extension lines directly to the outline of an object. important information. (See fig. Click here to purchase the full version from the ANSI store. When it is necessary for extension lines to cross each other, they should be broken (exceptions to this rule have been adopted since the development of CAD software). An example of this use of phantom lines is shown in the right-hand view of figure 3-36. = 1 ft. This standard advocated conventions in many ways, e.g. Fig. outside the object. This category only includes cookies that ensures basic functionalities and security features of the website. Notice how much easier it is to read and understand. Be sure to understand how to take Basic Engineering Drawing - Conventions and Abbreviations 1 Conventions make the drawing simple and easy to draw 2 The basis of any drawing is a line The use of a right type of line results in a correct drawing 3 The thickness of lines are varied depending on whether the drawing is drawn by … advantage of this functionality with the system you will be using. Just as the written word is controlled by standard practices of spelling and grammar, there are rules and conventions for the use of lines in drawing. Center lines may also be used to indicate the travel of a moving center, as shown in figure 3-24. Cutting plane lines, together with arrows and letters, make up the cutting plane indications. If the reference is to a line, the leader is always terminated at this line with an arrowhead, as shown in figure 3-33. Explanation of Line conventions for sketching and blueprints. The use of a right type of line results in a correct drawing. Theme by Press Customizr. One of the most important line drawing conventions used is the First 8 Lines rule.. Lines should be of two thicknesses: thin or thick. BS 8888:2008 Technical product specification. The use of a right type of line results in a correct drawing. 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. Figure 3-38, view C, is a front view showing how the object would look if it were cut in half. Notice the CUTTING PLANE LINE AA in figure 3-38, view A. engineering drawing practice for schools 81 colleges bureau ofindianstandards manak bhavan, 9 bahadur shah zafar marg new delhi 110002 . Center lines are used to indicate the center of a circle, arc, or any symmetrical object. If the section showed the sleeve as it would look if cut vertically into unequal parts, or cut only part way through, it would be a partial section. as shown in the left-hand view of figure 3-36. Lines, letters, and numbers are what engineering drawings are made of.
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