Alphabet of lines and orthographic drawing pdf
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types of technical drawing pdf
Objectives: At the end of this session you will be able to: - define a Line - explain use of lines - identify the ten main types of lines - differentiate where the line types are used - produce the lines with various line weights. April 28, Engineering Drawing 2. In order to understand what the drafter is trying to get across, you must be able to understand the symbols and lines he uses.
The standard thick line weight varies from 0. The standard thin line weight varies from 0. The general recommendation are that thick lines are twice as thick as thin lines. What is line? Definition: - Line is the most basic design 'tool'.
Examples: "A line is a dot that went for a walk. April 28, Engineering Drawing 4. Visible Lines Dark, heavy lines with approximate width 0. Show the outline and shape of an object. Define features you can see in a particular view. Shows the outline of a feature that can not be seen in a particular view. Used to help clarify a feature, but can be omitted if they clutter a drawing. Section Lines Thin lines usually drawn at a 45 degree angle. Indicate the material that has been cut through in a sectional view.
Section Line. Center Lines Thin line consisting of long and short dashes. Shows the center of holes, slots, paths of rotation, and symmetrical objects. Dimension Lines Thin, dark lines.
Show the length, width, and height of the features of an object. Terminated with arrowheads at the end. Extension Lines Thin line used to show the starting and stopping points of a dimension. Must have at least a 1mm space between the object and the extension line. Extension Line. Leader Lines Thin lines. Used to show the dimension of a feature or a note that is too large to be placed beside the feature itself.
Leader Line. Cutting Plane Lines Thick broken line that is terminated with short 90 degree arrowheads. Shows where a part is mentally cut in half to better see the interior detail. Break Lines Used to break out sections for clarity or for shortening a part. Three types of break lines with different line weights. Short Breaks. Long Breaks. Cylindrical Breaks. April 28, Engineering Drawing Thick wavy line. Used to break the edge or surface of a part for clarity of a hidden surface.
Short Break Line. Long, thin lines. Used to show that the middle section of an object has been removed so it can be drawn on a smaller piece of paper. Thin lines. Used to show round parts that are broken in half to better clarify the print or to reduce the length of the object.
Phantom Lines Thin lines made up of long dashes alternating with pairs of short dashes. Three purposes in drawings. To show the alternate position of moving parts. To show the relationship of parts that fit together. To show repeated detail.
Phantom lines can show where a part is moving to and from. Eliminates the confusion of thinking there may be 2 parts instead of just 1. Phantom Lines. Phantom lines can also show how two or more parts go together without having to draw and dimension both parts. Phantom lines can show repeated detail of an object. Saves the drafter time and the company money. Less chance of drafter error.
Line Thickness A thick continuous line is used for visible edges and outlines. A thin line is used for hatching, leader lines, short centre lines, dimensions and projections. Thin chain lines are a common feature on engineering drawings used to indicate centre lines. Centre lines are used to identify the centre of a circle, cylindrical features, or a line of symmetry.
Dashed lines are used to show important hidden detail for example wall thickness and holes.. Open navigation menu. Close suggestions Search Search. User Settings. Skip carousel. Carousel Previous. Carousel Next. What is Scribd? Alphabet of Lines. Uploaded by Fana Filli. Document Information click to expand document information Date uploaded Oct 18, Did you find this document useful?
Is this content inappropriate? Report this Document. Flag for inappropriate content. Download now. Save Save 1. Alphabet of Lines For Later. Related titles. Carousel Previous Carousel Next. Jump to Page. Search inside document. April 28, Engineering Drawing 2 of Lines Each line has a definite form and line weight. Alphabet In order to understand what the drafter is trying to get across, you must be able to understand the symbols and lines he uses. Short Break Lines Thick wavy line.
Long Break Lines Long, thin lines. Cylindrical Break Lines Thin lines. Documents Similar To 1. Cid Frencillo. Sesha Sai Kumar. Manuel J. Alex Taboada Moralda. YnOc Navarro. Dinesh Chandrasekaran. Neocent Designs. Molly Brennan. Aubrey Arellano. Fais Ibrahim. Cosmin Tiby.
alphabet of lines quiz
The second is a drawing done with instruments, known as a final drawing. A section view is a view used on a drawing to show an area or hidden part of an object by cutting away or removing some of that object. There are many sub categories that fall under engineering drawing, and interested artists will need to do further research to discover which path they want to take with their engineering drawing pursuits. So, drawings of other countries structures can also be studied easily. Technical drawing instruments are the tools used by professional and student drafters to render the precision graphics needed to manufacture a product or structure. This is particularly because 2H contains a very light amount of lead. The diagram below shows the various types of line, their description and general application: 1.
drawings are covered in ANSI Standard YM. • There are four different distinct thicknesses of lines in orthographic projection: – Very Thick. – Thick ( –
1. Alphabet of Lines
Alphabet of Lines The "Alphabet of Lines" refers to the different styles of lines used in drafting to show different features about an object that is drawn. There are eleven main line types visible, hidden, center, dimension, extension, leader, section, cutting-plane, phantom, viewing plane and break. Each line has a definite form and line weight. The standard thick line weight varies from. Visible lines are dark and heavy lines.
Objectives: At the end of this session you will be able to: - define a Line - explain use of lines - identify the ten main types of lines - differentiate where the line types are used - produce the lines with various line weights. April 28, Engineering Drawing 2. In order to understand what the drafter is trying to get across, you must be able to understand the symbols and lines he uses. The standard thick line weight varies from 0. The standard thin line weight varies from 0.
We will start by drawing an isometric box that makes up the main body of the object.