Introduction to AutoCAD 2010

Transcription

1 Page 1 Introduction to AutoCAD 2010 Alf Yarwood Chapter 18 Exercise 1 1. Open AutoCAD 2010 with a double-click on its shortcut icon in the Windows desktop. 2. Open the template acadiso3d.dwt. 3. Make new layers: Support (grey); Support Bolt (Magenta); Spindle (Blue); Spindle Bolt (Red). 4. Make layer Support current. 5. In a Four: Equal viewport setup, in the Front viewport construct a pline for the support frame and extrude to a height of 16. Set all viewports to the Realistic visual style. 6. In the Top viewport, construct two cylinders. Working in various viewports move them to a correct position with relation to the support. Form a union of the larger cylinder and the support and subtract the smaller cylinder.

2 Page 2 7. Make layer Support bolt current. In the Top viewport construct a pline for a solid of revolution to form the support bolt. 8. With the Revolve tool from Home/3D Modeling panel form the solid of revolution for the bolt. 9. Make layer Support current again and construct the cylinders at the base of the support. Union the two larger cylinders to the support and subtract the smaller. Form a fillet between the cylinders and the support. 10. Make layer Spindle bolt current and in the Top viewport construct a pline from which a solid of revolution can be constructed for the bolt.

3 Page Construct the nut and washer. 12. Make layer Spindle current and construct a pline for a solid of revolution for the spindle in the Front viewport. With the Revolve tool from the required solid of revolution. 13. Make layer Support current ad turn off all other layers. Fillet the edges of the support to a radius of Place the Top viewport in a single viewport and Zoom to Place a Point light 500 units above the centre of the model and two Distant lights in front and at a height of 500 and 300 of the model, one directly to the front left, the other to the front right. 16. Place the model in the ViewCube/Isometric view. 17. Attach materials to each part of the model and render. The rendering shown here has had metal materials. 18. Save the model drawing to the file name 18_Exercise01.dwg to a floppy disk. 19. Close the drawing window. Chapter 18 Exercise 2 1. Open AutoCAD 2010 with a double-click on its shortcut icon in the Windows desktop. 2. Open the template acadiso3d.dwt. 3. Using the Box tool from the Home/3D Modeling panel construct 2 boxes for the base and the body sitting on the base. 4. Place the drawing in the ViewCube/Right view. Form a union of the two boxes. 5. Construct the cylinder for the hole through the body and subtract it from the body. 6. Construct the box and cylinders for the right-hand end piece. Form a union of the box and outer cylinder and subtract the inner cylinder from the union. 7. Construct cylinders for the holes in this part and subtract them from the part. 8. Place the drawing in the ViewCube/Front view and construct the two cylinder for the front part. Form a union of the larger cylinder with the body and subtract the smaller from the body. 9. In the ViewCube/Top view construct cylinders for the holes in the base and subtract them from the base and construct one for the lubricating hole in the top of the body. 10. Place the drawing in the ViewCube/Isometric view and fillet necessary edges to a radius of 5.

4 Page Make the layer Construction current and turn layer 0 off. 12. Construct a pline from which a solid of revolution for the pin can be constructed. 13. Using the Revolve tool from the Home/3D Modeling panel, revolve the pline and call Hide. 14. Move the pin into its required position. 15. Place the model in the Southeast Isometric view and place in the 3D Hidden visual style Place the model in the Top view and add lighting. 17. Attach suitable metallic materials. 18. Place the model in the ViewCube/Isometric view and render. 19. Save the model drawing to the file name 18_Exercise02.dwg to a floppy disk. 20. Close the drawing window. Chapter 18 Exercise 3 1. Open AutoCAD 2010 with a double-click on its shortcut icon in the Windows desktop. 2. Open the template acadiso3d.dwt. 3. In the Front view, construct a pline from which a solid of revolution can be constructed for the base of the model. 4. Set ISOLINES to Call the Revolve tool with a left-click on its tool icon in the 3D Make control panel. 6. Revolve the pline. 7. In the Top view construct the outline of one of the tabs with its hole for the base and extrude to a height of Array the extrusion four times around the centre of the base and form a union of the four tabs with the base. 9. In the Front view check the tabs are in their correct positions. If not move them and form a union between the tabs and the base.

5 Page Place in the ViewCube/Isometric view. 11. Make a new layer Layer1 of colour red and make this new layer current. 12. In the ViewCube/Top view form the box and cylinder for the base of the top fitting. 13. In the ViewCube/Front view make sure the box and cylinder are in their correct places with regard to the base. If not move them. When correctly positioned form a union between the two objects. 14. Construct a pline for the upright holding the rotating arm and extrude to a height of In the ViewCube/Top view check the position of the arm in its base, moving if necessary. Form a union of the arm and the box and cylinder. 16. Make a new layer Layer2 of colour blue and make this new layer current. 17. In the ViewCube/Right view construct the outline of the rotating arm and extrude to a height of In the ViewCube/Top view check the position of the rotating arm and if necessary move it. 19. Place in the ViewCube/Isometric view.

6 Page Add fillets where needed. 21. In the ViewCube/Top view construct the holes in the plate and subtract them from the plate. 22. Make a new layer Layer3 of colour Magenta. In the ViewCube/Front view construct one of the bolts and in the ViewCube/Top view copy the bolt three times - one for each hole in the plate. 23. On Layer2 construct a pin of radius 5 and height 60 to fit into the holes on which the arm rotates. 24. In the ViewCube/Top view add suitable lighting. 25. Attach materials. 26. Render the model. 27. Save the model to the file name 18_Exercise03.dwg in a floppy disk. 28. Close the drawing window.

7 Page 7 Chapter 18 Exercise 4 1. Open AutoCAD 2010 with a double-click on its shortcut icon in the Windows desktop. 2. Open the template acadiso3d.dwt. 3. On layer 0 construct a box for the base. 4. Make Layer1 current and in the UCS/Front view construct a pline for a solid of revolution for the main part of the base. 5. Form the solid of revolution using the Revolve tool. Subtract a cylinder of radius 25 from the solid. 6. Construct the cylinders for one of the four slots surrounding the circular part of the base. 7. In the UCS WORLD construct pline outlines for the slot. 8. Using Move, Union and Subtract complete the model for one of the slots. 9. Array the slot four times around the base and form a union with the base. 10. Join the four arrayed slots to the base using the Union tool. 11. Fillet to a radius of 10 the corner where the slots join the base. 12. Make Layer2 current. 13. In the UCS WORLD construct a pline outline for the three arms. Extrude to a height of 15 and subtract the extruded circles from the remainder. 14. In the UCS/Front view construct two cylinders, one of radius 5 and height 55 and the other of radius 7.5 and height 2.5 at the right-hand end of the arms. 15. In the UCS WORLD copy the smaller cylinder to a position such that there is a R7.5 cylinder at the upper and lower sides of the right-hand end of the arms. 16. Array the three cylinders three times around the centre of the arms. 17. Form a union of the arm and all six smaller cylinders and subtract the three longer cylinders from the result. 18. In the ViewCube/Isometric view fillet the corners of the arms to a radius of 7.5.

8 Page In the UCS/Top view construct two cylinders, one of radius 20, the other of radius 25 and both of height 200 for the vertical part. 20. In the UCS/Front view, move the smaller cylinder vertically upwards by Form a union of the three arms and the larger cylinder and subtract the smaller cylinder from the union to complete that part. 22. In the UCS/Front view move the completed arms and cylinder into position within the base. 23. In the UCS/Top view add suitable lighting. 24. In the ViewCube/Isometric view add suitable materials 25. Render the model.

9 Page Make the layer magenta current. 27. Construct 3D models of the links as shown in the orthographic projection Fig Place each of the links into one of the slots for which they were designed. 29. In the UCS/Top view array the smaller link three times around and the larger 4 times around the centre. 30. Place the model in appropriate 3point UCS positions and rotate each link by 45 upwards from the arms or 45 downwards from the base. 31. Add a suitable material to the arms. Place in the ViewCube/Isometric view and render. 32. Save the drawing to a floppy disk with the file name 18_Exercise04.dwg. 33. Close the drawing window. Additional exercises 1. The smaller 3D model outline below shows two initials placed on a small stand. Construct a similar 3D model placing your own initials in place of the AY. Then form a 3D Array such as that shown to the right of the model.

10 Page Construct a 3D model drawing of the forceps shown in the upper two-view drawing. Using the Copy Faces tool from the Home/Solid Editing panel, move the upper face of the forceps upwards and then place the 3D model with its copied face in an isometric viewing position as in the lower of the two drawings below. 3. A rendering of part of a machine is shown with a gasket to fit between it and the part to which it is to be fastened. Construct a similar 3D model and add the gasket by using the Copy Faces tool from the Home/ Solid Editing panel. See Fig

11 Page 11 Multiple Choice questions 1. When calling the Extrude tool the following abbreviation can be entered at the command line: (a) ex (b) extr (c) There is no abbreviation. The name extrude must be entered in full (d) ext. 2. When a selected face of a 3D solid model drawing is selected by the Move Faces tool from the Home/ Solids Editing panel, the face is: (a) Moved away from the 3D solid as a separate entity (b) Moved in such a manner that the body of the 3D solid to which the face is attached is extruded (c) Moved to be placed on another 3D model (d) The whole of the 3D model is moved. 3. Is it possible to use the Extrude faces tool from the Home/Solids Editing panel on a region constructed from a closed polyline? (a) Yes, any region can have its face extruded using this tool (b) Yes, if the region has not been obtained by using any of the Boolean operators (c) No - a region of any type cannot be acted upon by this tool (d) Yes, providing the line of extrusion is a straight line or polyline. 4. The Boolean operators - Union, Subtract and Intersect are found in the panel: (a) Home/Modeling (b) View/UCS (c) Home/Solid Editing (d) Tools/ Drawing Utilities.