Learn the projection of lines in HindiLink to the same video in english https//wwwyoutubecom/watch?v=FtugLo9DMw8&t=459s&list=PLIhUrsYr8yHz_FkG5tGWXaNbIxVFor example, in a drawing, you can use projection lines on an auxiliary view to enable creation of additional views with proper alignment and size You can create a line with the projection line option set, or you can edit an existing line and set the projection line property later You can place dimensions and annotations to projection lines Principle of projection If straight lines are drawn from various points on the contour of an object to meet a plane the object is said to be projected on that plane The figure formed by joining in correct sequence the points at which these lines meet the plane is called a projection
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Projection of straight line in engineering drawing- Isometric Engineering Drawing degrees Next, tilt the cube towards the observer such that it rests on the front bottom corner with the solid diagonal opposite to the corner in which it rests and passing through the top front corner, is perpendicular to the plane of projection Example3 Explain engineering drawing isometric projection 45 degreesIntroduction to Engineering Drawing Principles of Engineering Drawing/Graphics Definition Engineering Drawing is the language of engineers It is a general principle of engineering drawings that they are projected using standardized, mathematically certain projection methods and rules (standards/conventions) Projection methods
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Projection methods are used to represent a 3D object in simple terms so that it can be understood more easily It's used in mechanical drawing and design so that the structure created by a designer can be communicated to manufacturers and builders A pictorial view of a design can't always show the details in complicated shapes that containAns –Drawing board, drawing sheet, minidrafter, scale, pencil and sandpaper block, cellotape, eraser and compassIn engineering drawing following four methods of projection are commonly used, these are (a) Isometric projection (b) Oblique projection (c) Perspective projection (d) Orthographic projection In the above methods (a), (b) and (c) represent the object by a pictorial view as an observer sees it
Orthographic Projections of Points, Lines, Planes & Solids (PPT), Engineering Drawing Mechanical Engineering Notes EduRev is made by best teachers of Mechanical Engineering This document is highly rated by Mechanical Engineering students and has been viewed 72 timesPrinciple of Projection If straight lines are drawn from various points on the contour of an object to meet a plane, the object is said to be projected on that plane The figure formed by joining, in correct sequence, the points at which these lines meetEngineering drawing can be tricky if you are generally not attentive it is one of those subjects in mechanical engineering which comes through practice and only practise It's better you free up your apprehensions a little bit and ask your instru
Draw projections Line is in 1st quadrant SOLUTION STEPS 1) Draw xy line and one projector 2) Locate a' 12mm above xy line & a 10mm below xy line 3) Take 300 0angle from a' & 40 from a and mark TL Ie 75mm on both lines Name those points b 1' and b 1 respectively 4) Join both points with a' and a respDraw the line firmly with a free and easy wristandarm motion Horizontal line Line of sight 2) Plane of projection (image plane or picture plane) Line conventions in engineering drawing Good practice Exercise •Complete three orthographic views of the Engineering Drawing is the language of Engineers Having a good communication skill is one important qualities for a successful career If you want yourself to be a Successful Engineer sound knowledge in Engineering Drawing is a Must Al though there are various important things to learn in Engineering drawing we will first learn to understand the difference between the First angle projection and Third angle projection
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Draw the projections and find the length of plan and elevation 8 An 80mm long line PQ has its end P on the HP and 15mm in front of the VP The line is inclined at 300 to the HP and its top view is inclined at 600 to the reference line Draw the projections of line PQ and determine true angle of inclination with the VP 9 Principle of Projection If straight lines are drawn from various points on the contour of an object to coincide a plane, the object is said to be projected on that plane The figure obtained by joining, in correct sequence, the points at which these lines meet the plane, is called the projection of the objectTo the XY line 5 Draw the horizontal locus lines through b 2, and b 1 ' 6 With center a and radius ab 1, draw an arc to cut the locus line drawn through b 2 at b Connect ab, the top view of the line AB 7 With center a' and radius a'b 2, draw an arc to cut the locus line drawn through b 1 ' at b' Connect a'b', the front view of the line AB
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For obtaining the image of an object, various points on the contour of an object, are thrown forward on to a plane by means of straight lines or visual rays The figure formed by joining various points thus obtained on the plane, is the image of the object and is called Projection7 Projections of Planes OBJECTIVES After studying this chapter, you will be able to Draw the projections of the plane surfaces of regular shapes like triangles, squares, rectangles, circles or Selection from Engineering Drawing, 2nd Edition Book The horizontal lines of the drawing look to meet at a point called Vanishing Point 3 The vanishing points are shown on the horizontal lines in the System of Horizontal Lines 4 If a horizontal line lies in the horizontal plane, then its actual length will be visible 5
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Of projections A projection is a drawing or representation of an entity on an imaginary plane or planes This projection planes serves the same purpose in technical drawing as is served by the movie screen A projection involves four components 1 The actual object that the drawing or projection representsThe figure or view formed by joining, in correct sequence, the points at which these lines meet the plane is called the Projection of the object The lines or rays drawn from the object to the plane are called Projectors The transparent plane on which the projections are drawn is known as Plane of ProjectionCE 100 CIVIL ENGINEERING DRAWING PROJECTION Shaika Sharkia Lecturer, Department of Civil Engineering The figure or view formed by joining, in correct sequence, the points at which these lines meet the plane is called the Projection of the object The lines or rays drawn from the object to the plane are called Projectors
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Types of Lines (1) Largesize compass with inter chang eable pencil and (1) Outlines pen legs (2) Margin lines (2) Lengthening bar (3) Dimension lines (3) Small bow compass (4) Extension or projection lines (4) Largesize divider (5) Small bow divider (5) Construction lines (6) Small bow inkpen (6) Hatching or section lines (7) Inking pen (7) Leader or pointer lines 1632 Drawing sectional views In orthogonal to complete of an ng Intemally of a The of C line to Nhlch it The of a lire (type A) FIGURE PART OR LOCAL SECTIONS Part at a to detail of, type u normal the maln m drawings in this THE FULL SECTIONAL VIEW the d FIGURE 310 ALIGNED SECTIONS In to detail a plane, a is 12 an eric of a which cut and apart Dimensions in engineering drawings are numerical values indicated graphically in a proper unit of measurement on engineering drawing with lines, symbols, and notes These are indicated on the engineering drawing to define the size characteristics such as length, height, breadth, diameter, radius, angle, etc
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Projections of Points in 2nd, 3rd and 4th Quadrant;Orthographic Projections Conventions and Projections of Simple Solids ; PROJECTION OF LINES SH 1132 Engineering Graphics FY B Tech a' b' a p' p Shortest distance between the point and line in True Length Point Point view of line TO OBTAIN THE SHORTEST DISTANCE BETWEEN A POINT AND A LINE Obtain the true length (shown in red) of a line by drawing the primary auxiliary view of the line with the reference line parallel to the original view and project the point also into the view Draw the point view of the line
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Projections of lines (Drawing practice) Problem 1 A straight line AB of true length 100 mm has its end A mm above HP and 30 mm in front of VP The top view of the line is 80 mm and front view is 70 mm Draw the projections (TV and FV) of the line AB and obtain the true inclinations of the line AB with HP and VPEngineering drawing has its own grammar in terms of projections, conventional representations, types of lines, abbreviations, symbols and various geometric constructions Q2 Name Different Drawing Instruments?Engineering Drawing Engineering Drawing is semester 2 subject in first year of engineering under Mumbai University Objectives for the subject Engineering Drawing is to impart and inculcate proper understanding of the theory of projection To impart the knowledge of reading a drawing To improve the visualization skill
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Engineering Drawing What is engineering drawing An engineering drawing, a type of technical drawing, which is used to fully and clearly define requirements for engineered items with scales Projection • If straight lines are drawn from various points on the contour (A contour line is a imaginary line which connects points of equalOutlines of revolved sectionsAnd practice of drawing lines 1101 1309 18 Hrs 2 Geometrical figures, lettering, numbering and method of dimensioning 1410 1618 18 Hrs 3 Free hand drawing 1719 1723 6 Hrs 4 Drawing sheet sizes, title block and item list 14 6 Hrs 5 Method of presentation of engineering drawing 1925 1930 12 Hrs
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Projections of line True length, True inclinations, Traces of linesOrtho Graphic Projection In the engineering industry communication between the drawing office and the work shop is achieved mainly by means of engineering drawings The principal method used to prepare these drawings is known as Ortho Graphic ProjectionPRACTICE PRO BLEMS FOR ENG INEERING DRAW ING I EXERCISE 3 DESCRIPTIVE GEOMETRY I 1 Draw the projections of the following points (a) Point A
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Projection of Lines Line parallel to one or both planes Line on a plane Projection of Lines Line perpendicular to one of the planes Projection of Lines Line inclined to HP & parallel to VP Engineering Drawing Author Anup Ghosh Created Date 8/5/11 PMProjection Methods 1st Angle and 3rd Angle Projections;Objectives To know about different types of lines & use of different types of pencils in an Engineering Drawing To know how to represents letters & numbers in drawing sheet To know projection of points ,straight lines, solids etc To know development of different types of surfaces To know about isometric projection
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What is projection line in civil engineering? Dimension, Projection, Leader, Hatching Lines Dimension, Projection, Leader, Hatching type lines must be drawn thin and continuous The extension lines for dimensioning should run from the outlines without leaving a gap and extend beyond the dimension lines This type is also used to draw outlines of adjacent and revolved sections Herein, what is projection in engineering drawing?
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Draw its projections 6 A line PQ has its end P, 10mm above the HP and mm in front of the VP The end Q is 85mm in front of the VP The front view of the line measures 75mm the distance between the end projectors is 50mm draw the projections of the line and find its true length and its true inclinations with the VP and hp 7• Draw a thin horizontal line, XY, to represent the line of intersection of HP and VP • Draw X1Y1 line to represent the line of intersection of VP and PP • Draw the Top View (p) • Draw the projector line • Draw the Front View (p) Y 1 figure using which any object like a machine component or a structural element is represented Thus projection of a straight line is the foundation of Engineering Drawing projections of two points gives the projection of the straight line joining the two points As per ISO convention the first angle of projection is used
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Projection of Lines Inclined to HP and VP; Projection Line In Engineering Drawing, Best Way Drawing, Projection Line In Engineering DrawingA point A is mm above HP and 30 mm in front of VP Draw its projection To draw the projections Draw the reference line XY Mark a point a' at a distance of mm above XY Through this point draw a perpendicular line to XY and mark the top view a at a
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A single drawing is composed of many basic elements, and different types of lines play distinct roles A variety of line styles graphically represent physical objects, including visible, hidden, center, cutting plane, section, and phantom Each style can be divided into different types Let's see what types of lines used in engineering drawings Projection Of Lines There are cases of projections of line 1Line Parallel to two Planes and Perpendicular to the third plane 2Line Inclined to one Plane and Parallel to another 3Line Inclined to both the Planes 15An engineering drawing is a type of technical drawing that is used to convey information about an object A common use is to specify the geometry necessary for the construction of a component and is called a detail drawing Usually, a number of drawings are necessary to completely specify even a simple component The drawings are linked together by a master drawing or assembly drawing which gives the drawing
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PROJECTIONS OF STRAIGHT LINES PPT, Engineering Drawing, Semester Mechanical Engineering Notes EduRev is made by best teachers of Mechanical Engineering This document is highly rated by Mechanical EngineeringThe continuous thin line is the most frequently used line type on Engineering Drawings These lines are solid and has no break in them Here is the list of cases where the continuous thin line will be used Imaginary lines of intersection;
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