ES101_Class_02_04092024.pdf

ES 101: Engineering Graphics Class#2 – 4th September 2024 Sameer Patel Assistant Professor Civil Engineering & Chemical Engineering IIT Gandhinagar  Drawing scale High vibration sensors: Modelling, design and integration, Co...

ES 101: Engineering Graphics Class#2 – 4th September 2024 Sameer Patel Assistant Professor Civil Engineering & Chemical Engineering IIT Gandhinagar  Drawing scale High vibration sensors: Modelling, design and integration, Conference Paper, May 2009 DOI: 10.1109/ESIME.2009.4938479, Source: IEEE Xplore https://www.bragitoff.com/wp-content/uploads/2016/04/gujarat.jpg  Drawing scale https://www.indiamart.com/proddetail/classmate-273-hb-black-lead-wooden-pencil-21396431462.html  Engineering Drawing ASME Y14.1M, Metric Drawing Sheet Size and Format  Title block D. A. Madsen, D. P. Madsen, Engineering Drawing and Design, Cengage Learning, 6th Ed., Boston  TITLE BLOCK 45 mm TITLE OF THE EXERCISE ES101: ENGINEERING GRAPHICS NAME: 15 mm 2024-25, SEMESTER – I, IITGN ALL DIMENSIONS ARE IN __ 15 mm ROLL NUMBER: 15 mm SCALE: GROUP NUMBER: 80 mm 80 mm 7  Engineering drawing lettering Drawing numbers, title block, and letters denoting the cutting planes and sections are written in 10 mm size (minimum character height) Drawing title is written in 7 mm size (minimum character height) Hatching, subtitles, materials, dimensions, notes, etc., are written in 3.5 mm size (minimum character height) DRAWING 1 Engineering drawing lettering F. E. Giesecke et al., Technical Drawing with Engineering Graphics, Prentice Hall, 15th Ed., New York  Drawing views (Orthographic projections) Orthographic projection is used to change 3-D physical objects into 2-D 2 drawings that effectively describe the design and features of an object 1 Orthographic projection is projection of the features of an object onto an imaginary plane called a plane of 4 projection The projection of the features of the object is made by lines of sight that are perpendicular to the plane of projection The view that shows the actual shape of the object is called the true geometry view. The plane of projection is parallel to the surface of the object When the plane of projection is not 1 2 parallel to the surface of the object, the resulting orthographic view is foreshortened, or shorter than true length 4 3 D. A. Madsen, D. P. Madsen, Engineering Drawing and Design, Cengage Learning, 6th Ed., Boston  When the plane of projection is not parallel to the surface of the object, the resulting orthographic view is foreshortened, or shorter than true True size length 40 nt Fro Foreshortened 40 nt Fro F. E. Giesecke et al., Technical Drawing with Engineering Graphics, Prentice Hall, 15th Ed., New York  Drawing views (First angle projections) GLASS BOX LP VP VP HP VP LP HP VP: Vertical plane – Front view HP: Horizontal plane - Top view LP: Left profile plane – Right side view HP D. A. Madsen, D. P. Madsen, Engineering Drawing and Design, Cengage Learning, 6th Ed., Boston  A(B) B B A A D(C) C C RP D B(C) D VP A(D) HP  Line types D. A. Madsen, D. P. Madsen, Engineering Drawing and Design, Cengage Learning, 6th Ed., Boston  Line types F. E. Giesecke et al., Technical Drawing with Engineering Graphics, Prentice Hall, 15th Ed., New York  Line types F. E. Giesecke et al., Technical Drawing with Engineering Graphics, Prentice Hall, 15th Ed., New York  Dimensioning D. A. Madsen, D. P. Madsen, Engineering Drawing and Design, Cengage Learning, 6th Ed., Boston  Dimensioning Avoid crossing dimension line Provide dimensions on one side of the drawing whenever possible Extension line shouldn’t be too long Do not (avoid) dimension on the drawing itself Do not dimension close to the drawing 2500 3500 2500 600 500 500 F. E. Giesecke et al., Technical Drawing with Engineering Graphics, Prentice Hall, 15th Ed., New York  Dimensioning F. E. Giesecke et al., Technical Drawing with Engineering Graphics, Prentice Hall, 15th Ed., New York  Characteristics Simple Not too few Clean Dimensioning Not too Legible many Complete  Curved features Diameters may be dimensioned in one of two ways. – Either dimension directly across the circle (not on a center line) OR – Project the diameter to outside the outline.  Curved features If possible, show center of the curvature Show the radius with symbol R in front of the dimension On either side of the outline but should, of course, be kept outside if possible.  Angles The arrowheads may be drawn either side of the dimension lines The dimension may be inserted between the dimension lines or outside them. 30 38.5° 20 14.5 23  Fillets and chamfers Stress concentration To avoid stress concentration R5 and/or sharp edges, fillets and chamfers are provided D. A. Madsen, D. P. Madsen, Engineering Drawing and Design, Cengage Learning, 6th Ed., Boston https://pveng.com/home/fea-stress-analysis/fea-methods-blo g/#MeshNearDiscontinuities  Fillets and chamfers When a curved surface is tangent to a plane surface, no line is drawn When a curved surface intersects a plane surface a definite edge is formed Line No line No line Line F. E. Giesecke et al., Technical Drawing with Engineering Graphics, Prentice Hall, 15th Ed., New York D. A. Madsen, D. P. Madsen, Engineering Drawing and Design, Cengage Learning, 6th Ed., Boston  Precedence of lines Object Line Hidden Line Center Line F. E. Giesecke et al., Technical Drawing with Engineering Graphics, Prentice Hall, 15th Ed., New York  Hidden lines Hidden line should join object line, except when it Hidden lines should join other appears like an extension of the object line hidden lines F. E. Giesecke et al., Technical Drawing with Engineering Graphics, Prentice Hall, 15th Ed., New York  Hidden lines Parallel hidden lines should be staggered Hidden lines should join other hidden lines F. E. Giesecke et al., Technical Drawing with Engineering Graphics, Prentice Hall, 15th Ed., New York  Hidden lines Hidden line should join object line, except when Curved hidden lines should it appears like an extension of the object line join center line F. E. Giesecke et al., Technical Drawing with Engineering Graphics, Prentice Hall, 15th Ed., New York  Sectioned views Section views are used to Document the design and manufacture of one piece parts Document assembly of multiple parts Aid in visualizing the internal working of a design https://chemicalengineeringworld.com/orbit-valves-introduction/ https://www.wermac.org/images_large/valve_ball.html F. E. Giesecke et al., Technical Drawing with Engineering Graphics, Prentice Hall, 15th Ed., New York  Sectioned views Part retained Part removed F. E. Giesecke et al., Technical Drawing with Engineering Graphics, Prentice Hall, 15th Ed., New York  Sectioned views A SECTION A-A A The arrows at the ends of the cutting-plane line indicate the direction of sight for the section view The arrows point toward the section being viewed F. E. Giesecke et al., Technical Drawing with Engineering Graphics, Prentice Hall, 15th Ed., New York  Sectioned views F. E. Giesecke et al., Technical Drawing with Engineering Graphics, Prentice Hall, 15th Ed., New York  Sectioned views F. E. Giesecke et al., Technical Drawing with Engineering Graphics, Prentice Hall, 15th Ed., New York Rotated section Removed Section  Free-hand sketching Rough sketch Engineering drawing D. A. Madsen, D. P. Madsen, Engineering Drawing and Design, Cengage Learning, 6th Ed., Boston  Free-hand sketching D. A. Madsen, D. P. Madsen, Engineering Drawing and Design, Cengage Learning, 6th Ed., Boston  Free-hand sketching D. A. Madsen, D. P. Madsen, Engineering Drawing and Design, Cengage Learning, 6th Ed., Boston  TOP VIEW LEFT SIDE RP: Right profile plane VIEW FRONT VIEW VP RP HP M ite rl in e https://en.wikipedia.org/wiki/Periscope#/  Fro nt Fro nt Fro nt F. E. Giesecke et al., Technical Drawing with Engineering Graphics, Prentice Hall, 15th Ed., New York  Fro nt F. E. Giesecke et al., Technical Drawing with Engineering Graphics, Prentice Hall, 15th Ed., New York F. E. Giesecke et al., Technical Drawing with Engineering Graphics, Prentice Hall, 15th Ed., New York F. E. Giesecke et al., Technical Drawing with Engineering Graphics, Prentice Hall, 15th Ed., New York  RP: Right profile plane LEFT SIDE VIEW VP RP HP M ite rl in e D. A. Madsen, D. P. Madsen, Engineering Drawing and Design, Cengage Learning, 6th Ed., Boston Thank you https://www.goillusions.com/