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This document discusses orthographic projections and different projection methods used in engineering drawing. It provides details on: - Orthographic projection involves projecting a 3D object onto a 2D plane using parallel lines perpendicular to the projection plane. - First angle and third angle projection methods depend on whether the object is in the first or third quadrant relative to the horizontal and vertical planes. - For first angle projection, the front view is on the vertical plane and the top view is below the x-y line on the horizontal plane. Left and right side views are drawn to the left and right of the front view.
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Orthographic projection new (1)
Orthographic projection is a method used in engineering to produce technical drawings from which components are made. There are two main types: first angle and third angle projection. In first angle projection, commonly used in Europe, the object is placed in the first angle formed by vertical and horizontal planes. In third angle projection, used in the US, the object is placed in the third angle. Orthographic projections use multiple views, such as front, top, and side views, projected onto orthogonal planes to depict a three-dimensional object in two dimensions. Standard symbols are used to indicate first or third angle projection.
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This document summarizes different types of projections used in engineering graphics. It discusses parallel, perspective, oblique, orthographic and axonometric projections. Orthographic projections include multi-view projections, where an object is depicted through multiple 2D views, and axonometric projections which show an object inclined towards the plane of projection in a single view. First angle and third angle projections determine the positioning of views in a multi-view drawing. Examples demonstrate first and third angle projections of objects.
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This document discusses orthographic projection techniques, specifically first angle and third angle projection. It begins by defining projection and multi-view drawings. Orthographic projection produces views with parallel lines perpendicular to projection planes. First angle projection shows the object in front of the vertical plane, with the top view below the front view. Third angle projection shows the object behind the vertical plane, with the top view above the front view. Examples of first and third angle projections are provided to illustrate the different view orientations.
Ortho.ppt
This document discusses orthographic projection and its types. It explains that orthographic projection involves obtaining views of an object by using parallel projectors that are perpendicular to the plane of projection. The key views obtained are the front, top, and side views. It also discusses the differences between first angle and third angle projection systems, with third angle being the more commonly used ISO standard.
Introduction to orthographic projections
This document provides an introduction to engineering drawing and multiview orthographic projections. It explains that multiview drawings represent 3D objects in 2D using multiple views, and are used in engineering and construction. Orthographic projections show each view perpendicular to the line of sight, displaying 2 of 3 dimensions of height, width, and depth. There are typically 6 standard views - front, top, side, and back - but additional views may be needed for complex objects. The "glass box" technique models objects inside an invisible glass box to capture views from each side.
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This document discusses orthographic projection, including that it uses first angle projection, depicts orthographic, necessary, and front, top, right side views, and names the six standard views as front, right-side, left-side, rear, top, and bottom. It also names the three principal dimensions as width, height, and depth and notes the US uses third angle projection while Germany uses first angle projection.
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Auxiliary
The document discusses auxiliary views in engineering graphics. An auxiliary view is an orthographic projection taken from a plane that is not parallel to the standard frontal, horizontal, or profile views. Auxiliary views are needed to show the true length of oblique lines or sizes of inclined planes. The steps for drawing an auxiliary view are outlined: 1) select the surface/line of interest, 2) draw construction lines perpendicular to it, 3) draw a reference plane, 4) transfer dimensions, 5) complete the view. Auxiliary views are classified by the principal dimension shown - depth, height, or width. Examples of different types of auxiliary views are also provided.
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Orthographic projection new (1)
Orthographic projection is a method used in engineering to produce technical drawings from which components are made. There are two main types: first angle and third angle projection. In first angle projection, commonly used in Europe, the object is placed in the first angle formed by vertical and horizontal planes. In third angle projection, used in the US, the object is placed in the third angle. Orthographic projections use multiple views, such as front, top, and side views, projected onto orthogonal planes to depict a three-dimensional object in two dimensions. Standard symbols are used to indicate first or third angle projection.
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This document summarizes different types of projections used in engineering graphics. It discusses parallel, perspective, oblique, orthographic and axonometric projections. Orthographic projections include multi-view projections, where an object is depicted through multiple 2D views, and axonometric projections which show an object inclined towards the plane of projection in a single view. First angle and third angle projections determine the positioning of views in a multi-view drawing. Examples demonstrate first and third angle projections of objects.
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This document discusses orthographic projection techniques, specifically first angle and third angle projection. It begins by defining projection and multi-view drawings. Orthographic projection produces views with parallel lines perpendicular to projection planes. First angle projection shows the object in front of the vertical plane, with the top view below the front view. Third angle projection shows the object behind the vertical plane, with the top view above the front view. Examples of first and third angle projections are provided to illustrate the different view orientations.
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This document discusses orthographic projection and its types. It explains that orthographic projection involves obtaining views of an object by using parallel projectors that are perpendicular to the plane of projection. The key views obtained are the front, top, and side views. It also discusses the differences between first angle and third angle projection systems, with third angle being the more commonly used ISO standard.
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This document provides an introduction to engineering drawing and multiview orthographic projections. It explains that multiview drawings represent 3D objects in 2D using multiple views, and are used in engineering and construction. Orthographic projections show each view perpendicular to the line of sight, displaying 2 of 3 dimensions of height, width, and depth. There are typically 6 standard views - front, top, side, and back - but additional views may be needed for complex objects. The "glass box" technique models objects inside an invisible glass box to capture views from each side.
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This document discusses orthographic projection, including that it uses first angle projection, depicts orthographic, necessary, and front, top, right side views, and names the six standard views as front, right-side, left-side, rear, top, and bottom. It also names the three principal dimensions as width, height, and depth and notes the US uses third angle projection while Germany uses first angle projection.
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This document discusses different types of technical drawing projections used to represent 3D objects in 2D drawings. It describes orthographic projections where projectors are perpendicular to the projection plane, resulting in front, top, and side views of an object. Axonometric projections show an object inclined toward the projection plane in a single view. Multiview projections use front, top, right side, etc. views. First angle and third angle projections determine the placement of views, with first angle being the European standard and third angle being used in America.
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The document discusses auxiliary views in engineering graphics. An auxiliary view is an orthographic projection taken from a plane that is not parallel to the standard frontal, horizontal, or profile views. Auxiliary views are needed to show the true length of oblique lines or sizes of inclined planes. The steps for drawing an auxiliary view are outlined: 1) select the surface/line of interest, 2) draw construction lines perpendicular to it, 3) draw a reference plane, 4) transfer dimensions, 5) complete the view. Auxiliary views are classified by the principal dimension shown - depth, height, or width. Examples of different types of auxiliary views are also provided.
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This document provides information about orthographic projections and isometric projections. It defines key terms like planes of projection, different views, and methods of projection. It explains how to draw multi-view orthographic projections using the first angle method and construct isometric projections. Examples are provided to demonstrate how to draw front, top, and side views of objects from pictorial representations using orthographic projections as well as how to draw basic 2D shapes using isometric projections.
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Orthographic projection is a technique used to create multi-view drawings. It involves projecting lines perpendicular from an object to projection planes to create two-dimensional views. A multi-view drawing shows two or more views of a three-dimensional object. Standard views include the top, front, and side views. Additional views are included as needed to fully describe the object's shape and dimensions.
Durga. ORTOGRAPHIC PROJECTION.ppt
The document discusses orthographic projections, which is a method of representing 3D objects in 2D views by projecting them onto planes. It defines key terms like front view, top view, and side view which are projections onto the vertical, horizontal, and profile planes respectively. It also explains the first angle and third angle methods of orthographic projections, where the object is placed in different quadrants relative to the planes and observer. The document provides examples of drawing orthographic projections of different objects using the first angle method.
Part 2 03.ppt
Orthographic projections involve observing an object from three directions that are perpendicular to three planes - the front, top, and side views. The document then explains the first angle and third angle methods of technical drawing, where the object is situated in different quadrants relative to the planes and observer. Examples are given of drawing three views of objects using first angle projection.
Projections unit 3
The document discusses orthographic projections and projections of solids. It defines orthographic projections as a method of representing the shape of a 3D object on a 2D surface using multiple views. It describes the principal planes used - horizontal plane, vertical frontal plane, and profile plane. It also discusses the first angle and third angle methods of projection. The document then defines different types of solids like polyhedra and solids of revolution. It describes various polyhedra like prisms, pyramids, and their types. It also defines solids of revolution like cylinders, cones, spheres. Important terms used in projections of solids like edges, generators, apex, and axis are also explained.
Projection of Points.pptx
Orthographic projections are a method of producing dimensioned drawings of 3D objects using a series of 2D views to show the object's length, width, and depth. There are nine types of projections for points in space depending on their location relative to the horizontal and vertical planes. The document provides examples of each type of point projection and conventions for orthographic projection drawings.
unit_2_orthographic_projection_drawings.docx
This document defines and explains orthographic projections. Orthographic projection is a method of projection where projectors are perpendicular to the plane of projection. It produces multi-view drawings that show an object's sides. The key principles are that projectors are lines drawn from the object to the plane, the plane of projection is where views are drawn, and projections are views formed by joining points where projectors meet the plane. The document also briefly introduces pictorial projections like isometric and perspective, and provides 10 example problems of drawing orthographic multi-view projections of objects showing front, top, and side views.
Lecture 13 Projection of Points.pptx
Here are the projections of the given point:
F.V: Point above reference line at 5/50 = 0.1 units
T.V: Point in front of reference line at 6/50 = 0.12 units
Q2) A point is 2m below H.P. and 4m behind V.P. Draw its projection. Assume R.F. as 1:50
ORTHOGRAPHIC PROJECTIONS for engineering graphics
This document provides an overview of orthographic projections in technical drawing. It defines orthographic projections as different views of an object projected onto reference planes perpendicular to the plane. It describes the main reference planes used - horizontal, vertical, and profile planes - and the corresponding front, top, and side views projected onto them. The document also discusses view selection procedures and provides examples of drawing orthographic projections of different objects.
ORTHOGRAPHIC PROJECTIONS of engineering graphics
This document provides an overview of orthographic projections in technical drawing. It defines orthographic projections as different views of an object projected onto reference planes perpendicular to the plane. It describes the main reference planes used - horizontal, vertical, and profile planes - and the corresponding front, top, and side views projected onto them. The document also discusses view selection procedures and provides examples of how to draw orthographic projections of different objects.
engineering graphics _ free hand sketch
The document discusses engineering graphics and freehand sketching. It covers plane curves like ellipses, parabolas, hyperbolas and their construction. It also discusses representation of 3D objects through multiple views and developing visualization skills through freehand sketching. The document then provides steps for sketching orthographic views from a pictorial view, including outlining views, sketching visible and hidden lines, darkening the views, and adding letters. An example is provided where the front, top and side views are sketched from a given pictorial view using the outlined procedure.
Pp chapter 5
This document discusses technical sketching and multiview projections. It begins by explaining the basic principles behind projections, including the relationship between an object, observer, projection plane, and projectors. It then covers different types of projections like perspective, parallel, and orthographic. The document also discusses how to create multiview projections using a "glass box" method, which involves projecting views of an object onto planes that form a box. It explains how to unfold these planes onto a flat surface and align the views. Guidelines are provided for technical sketching techniques and conventions like hidden lines.
Orthographic projections
1. Orthographic projections are a method of technical drawing where different views of an object are projected onto horizontal, vertical, and side reference planes.
2. There are three main views: the front view projected onto the vertical plane, the top view projected onto the horizontal plane, and the side view projected onto the profile plane.
3. The document provides examples of how to select views, orient objects, and draw orthographic projections according to first-angle or third-angle projection systems.
TYPES.ppt
The document discusses various types of technical drawings used to represent 3D objects in 2D. It explains that orthographic projection uses perpendicular lines to project the shapes of an object onto planes, showing the front, top and side views. Isometric drawings depict an object from three sides at once using a 30-60-90 triangle grid. Other pictorial drawings mentioned include axonometric, dimetric, trimetric, oblique, cavalier cabinet, and one-point and two-point perspective drawings. Key principles of dimensions - width, height, and depth - are also defined. The document ends with sample questions to test the reader's understanding.
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Presentation1
- 1. Orthographic projection • In engineering drawing the meaning of the word projection is to project(Throw ) an object on to a plane by means of straight lines. • The representation of any three dimensional object placed in front of a two dimensional plane is called Projection of an object on that plane.
- 3. contents Introduction to orthographic projections First angle projection method Third angle projection methods Drawing orthographic projection of simple pictorial view
- 4. Introduction to orthographic projection • In orthographical projection it is assumed that observer is at infinite distance and rays or projection lines are parallel to each other and perpendicular to the plane of projection.(e.g board and students, theater)
- 5. System of orthographic projection
- 6. How to identify the quadrant of object Sr.no Quadrant Position of the object with respective planes of projection 1 First Above HP,in front of VP 2 Second Above HP,Behind V.p 3 Third Below HP.Behind VP 4 Fourth Below HP,in front of VP
- 7. Position of the views on a plane paper when object is lying in four quadrant. Position of the object Position of the top view Position of the front view First quadrant Below XY axis Above XY axis Second quadrant NA NA Third quadrant Above XY Below XY Fourth quadrant NA NA
- 9. First angle projection method • When an object is situated in the first quadrant, The method of projection is said to be FIRST ANGLE PROJECTION METHOD. • When an object is situated in third quadrant ,The method of projection is sai to be THIRD ANGLE PROJECTION METHOD.
- 10. Important facts about first angle projection method 1.The object is situated in first quadrant. 2.The object lies between the observer and the principal plane. 3.The orthographic projection of an object obtained on the vertical plane is front view. 4.The orthographic projection of an object obtained on HP is TV and lies below the XY line. 5.LHSV is drawn on the right side of FRONT VIEW. 6.RHSV is drawn on the left side of FRONT VIEW.
- 11. Now you can analyze better………..
- 12. Procedure of preparing orthographic views by using first angle projection method 1.Find out the maximum size of box which will contain the object. 2.Draw FV, TV, and RHSV of the imaginary box.While drawing the views of the box maintain proper spacing of the views with reference lines XY 3.Now Draw the portion which is visible from front in FRONT VIEW. 4.The portion of the object which will be visible from the top is drawn in top view.
- 13. Third angle projection method When object is situated in third quadrant,The method of projection is said to be THIRD ANGLE PROJECTION METHOD.
- 14. THANK YOU