tailieunhanh - Lecture Engineering drawing and design - Lecture 5: Drawing procedure and dimensioning

Upon completion of this lesson, the successful participant will be able to: To learn about differences between assembly and detailed drawings, to understand steps and order of drawing procedure, to learn general rules of dimensioning and specific dimensioning of drawing features. | Design web Design web Objectives for today ME 1110 – Engineering Practice 1 Engineering Drawing and Design - Lecture 5 To learn about differences between assembly and detailed drawings o understand steps and order of drawing procedure To learn general rules of dimensioning and specific dimensioning of drawing features Drawing Procedure and Dimensioning Prof Ahmed Kovacevic School of Engineering and Mathematical Sciences Room C130, Phone: 8780, E-Mail: 1 Ahmed Kovacevic, City University London 2 Ahmed Kovacevic, City University London Design web Assembly drawing 3 Design web Example detailed drawing of bracket Ahmed Kovacevic, City University London 4 Ahmed Kovacevic, City University London Design web Design web Detailed drawing Drawing Scales Scale is the linear ratio of the size of the object and the size of its drawing view » » » » It consist of the word SCALE and the ratio SCALE 1:1 for full size SCALE X:1 for enlargement (X > 1) SCALE 1:X for reduction (X > 1) BS8888 Dimension values in drawing refer to the full size of the object. 5 Ahmed Kovacevic, City University London 6 Ahmed Kovacevic, City University London 6 Design web Design web Drawing procedure Drawing procedure 2 Accurate drawings Methodical approach Neat and clean 7 Ahmed Kovacevic, City University London Dimensioning basics 9 8 Ahmed Kovacevic, City University London Design web Design web Dimension elements Ahmed Kovacevic, City University London 10 Ahmed Kovacevic, City University London Design web Design web Symbols & Sizes 11 Ahmed Kovacevic, City University London Positioning of dimensions 12 Ahmed Kovacevic, City University London Design web Design web Positioning of dimensions Superimposed Coordinate Baseline Staggered dimensions Positioning of dimensions Baseline or Datum Dimensions Combined Chain 13 Ahmed Kovacevic, City University London 14 Ahmed Kovacevic, City .