Robot Modelling and Assembling Day 3
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Robot Modelling and Assembling Day 3

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Robot Modelling and Assembling Day 3 Robot Modelling and Assembling Day 3 Presentation Transcript

  • Week 2 Day 1Workshop by
  • Highlights of Previous Lecture• What is CAD and its advantages?• Introduction to Pro/ENGINEER and its environment• Introduction to Sketch mode and its tools
  • Today’s Lecture• Dimensions – Definition – Weak Dimensions – Strong Dimensions – How to use Dimensions to give a required shape• Constraints – Definition – Types of Constraints• Practicing Dimensions and Constraints
  • Dimensions• Definition – Measurement of entities • Length • Radius, Diameter • Angles
  • Weak vs. Strong Dimensions• Weak Dimensions – Are grey in color – made automatically by the software – Can be modified by dragging the edges of shape(s)• Strong Dimensions – Are in white color – Have to be entered manually – Locks the shape, i.e. the feature cannot be dragged to change
  • Dimensioning a Shape• Draw a rectangle, randomly of any size• Now we want to make its size• Double click the weak dimensions – They will become editable – Enter the desired values
  • Radius & Diameter Dimensions• To this rectangle, add Fillet of dimension 3 units – Fillet measuring dimension is Radius• Now add a circle at the center of this shape of diameter 5 units or radius 2.5 units
  • Angular Dimensions• Draw 2 lines of any dimensions, both meeting at one point• Click the Dimension tool• Select the two lines• Now click the MMB between these lines
  • Constraints• Definition – A limitation or restriction• Why they are used? – To give our drawings a definite shape• Types – Horizontal, Vertical, Perpendicular, Tangent, Equal Parallel, Symmetric
  • Using Constraints• Click the constraint icon• pops-up a window, with title “Constraints”• Draw different shapes and apply them• Represented by letters and symbols
  • Horizontal Constraint• Makes any line horizontal• Represented by letter “H” Horizontal constraint
  • Vertical Constraint• Makes any line vertical• Represented by letter “V” Vertical constraint
  • Parallel Constraint• Makes two line Parallel to each other• Represented by the symbol “//” Parallel constraint
  • Perpendicular Constraint• Makes two lines perpendicular to each other• Also called “Orthogonal” constraint Perpendicular constraint
  • Equal Constraint• Makes two entities equal to each other• Applied to radius (R), diameter, length (L), angles measurement Equal constraint
  • Tangential Constraint• Makes a point tangent to the curve• Represented by letter “T” Tangential constraint
  • Applying Constraints• Equilateral Triangle• Isosceles Triangle
  • Equilateral Triangle
  • Isosceles Triangle
  • Practice Drawing 1
  • Practice Drawing 2