Knob of Switch-Autodesk Inventor 2013 (with caption and audio narration)
Serial No. 184 Knob of Switch-Autodesk Inventor 2013 (with caption and audio narration) Click the following link to get the model file: – http://bit.ly/2nI2Q2o Transcription of Video Modelling a ‘Knob of Switch’ (Autodesk Inventor 2013) Open a New Standard (in).ipt file. Create a new 2D sketch on the XY Plane. Draw a circle of 1 ¾ inch diameter, coincident with the auto projected part origin. Click Finish 2D Sketch command from the marking menu to exit the sketching mode. Activate the ‘Extrude’ Command. It will automatically select the circle as profile. Enter the extrusion value ¼ inches and click OK. Change the colour of the model to ‘Flaked Reflective – Beige’. Save the file with the name ‘Knob of Switch’. Change the view of the model by using View Cube. Set the view as Home View by clicking the toggle next to View Cube. Start a new sketch on the top face of the model. Take the project of circular edge and Y Axis. Convert this vertical line and circle into construction geometry. Draw an arc over the projected edge of the model with the help of Centre Point Arc tool. Apply a Coincident Constraint between mid-point of Arc and projected Y Axis line. Give a linear dimension 1/4 inch between both the end points of the arc. In the same way, draw another centre point arc as displayed. Apply a Coincident Constraint between mid-point of arc and Y Axis. Give a linear dimension 1/2 inch between both the end points of the arc. Finish the sketch. Create a new Work Axis on the one end of the arc, parallel to Z Axis of the model. Create a new Work Point at the intersection of Work Axis 1 and bottom circular edge of the model. Create a new work plane by using Three Point work plane tool. Close the visibility of Work Point1 and Work Plane1. Start a new sketch on this work plane. Take the project of the model by using Projected Cut Edges tool. Draw two vertical lines on both the end points of the top projected edge of the model. And apply dimension 1 inch on these two lines. Close the profile by using line tool. Convert the sketches into construction geometry which are presently not in use. Exit from the sketching environment. Create another Work Axis on the second end point of the arc, parallel to Z Axis of the model. Create another Work Point at the intersection of Work Axis 2 and bottom circular edge of the model. Create a new work plane by using Three Points work plane tool. Start a new sketch on this work plane. Take the project of the model by using Projected Cut Edges tool. Draw two vertical lines on both the end points of the top edge of the model. And apply dimension 1 inch on these two lines. Close the profile by using line tool. Convert the sketches into construction geometry which are presently not in use. Exit from the sketching environment. Create another 3 Point work plane on the top end points of these lines. Create a new sketch on this work plane. Take the project of both arcs on this work plane. Finish the sketch. Start the Loft tool. First select both the closed sketch profiles in the design window. Then select four arcs as rails. Click OK to create the Loft feature. Create a new sketch on the top face of the model. Take the project of top face of model by using Project Geometry tool. Create a new sketch profile with the help of Offset tool. Affix offset distance 1/32 inch between the lines. Take the offset of upper and lower segment of arc. Affix offset distance 5/16 inch between the arcs. Snap the end points of arcs with the adjacent lines by using coincident constraint tool. Erase the extra lines and arcs with the help of Trim tool. Finish the 2D sketch. Cut the enclosed area (defined by Sketch6) 1/32 inch towards downward direction by using Extrude Command. Pick up the Fillet tool. Select this circular edge of the top face, enter the value 1/4 inch in the Radius input box and click OK. Apply another fillet of value 1/8 inch on the opposite side of the previous circular edge. Rotate the model by using View Cube. Create a new sketch on the bottom face of the model. Take the project of bottom face of the model with the help of Project Geometry tool. Create a new circle with the help of Offset tool. Affix offset distance 1/8 inch between these two circles. Finish the sketch. Cut the enclosed area (defined by Sketch7) 3/16 inch towards downward direction by using Extrude Command. Create a new sketch on the inner circular face of the model. Draw a circle of diameter 5/8 inch and extrude this circle to 1/8 inch. Create a new sketch on the YZ Plane of Knob-Switch. Right click in the design window and select Slice Graphics command. Take the project of Z Axis of the model and outer vertical edge. Select both the vertical lines and change their colour to white. Draw a horizontal line. Place dimension ¼ inch between bottom edge of the model and horizontal line. Select both the vertical lines and convert them into construction geometry. Draw a vertical line of 1/32 inch length over the projected Z Axis of the model. Draw an arc coincident with these two points with the help Three Point Arc tool. Create another horizontal line and apply a tangent constraint between arc and this line. Activate the Revolve tool from the right click context menu. It will automatically select the sketch profile. Click on this line to specify the axis of revolution and click on green checkmark. A smooth oval face is created. Rotate the model on the back side. Create a new sketch on the blue circular face. Draw a circle of diameter 5/16 inch, coincident
