CATIA LABSHEETS ZEIT 1501: Engineering Practice and Design. Dr. Hemant Kumar Singh Dr. Khairul Alam

Transcription

1 CATIA LABSHEETS ZEIT 1501: Engineering Practice and Design Dr. Hemant Kumar Singh Dr. Khairul Alam 2014

2 Important Information on CATIA Drawing Submissions: 2014 Please take note of the following: (a) (b) (c) (d) (e) (f) Please save your drawing frequently. Be aware of CATIA crashes and unfinished drawings cannot be assessed. Please make sure you sign against your name each class you come in. The tutors will be collecting your CATIA drawings on their USB Drive at the end of each session. The name of the file should be T1_z CATPart for a student with id z for Tutorial 1 submission. For tutorials which have part A, B and C, they would be names as T1A_z CATPart and so on. Refer to Setting Up for setting up CATIA. Please refrain from jumping across groups and be on time for the classes. Setting Up 1. Start-up is usually very slow.wait patiently. 2. Menu bar: Tools/Options/Infrastructure/Part Infrastructure/Display. Display in Specification Tree, check all buttons ON. 3. Menu bar: Tools/Options/Display/Performance/3D Accuracy and 2D Accuracy set to Press OK to save. 4. Menu bar: Tools/Options/Mechanical Design/Sketcher/Constraint. Make sure Creates the geometrical constraints and Creates the dimensional constraints are checked ON. 5. Create a Folder named as your student (Catia_zID) and put all your files for the tutorial in it which will be collected at the end of each class. 6. Setting up steps 1-4 need to be done in every Tutorial Class. Fig. 2: The screen that appears after closing the initial product file while starting CATIA 2

3 PLAN OF ACTIVITIES Day-1 Day-2 Lecture (50 mins) Introduction (90 mins) Task-2A (50 mins) Task-2B (50 mins) Task-1A (50 mins) Task-2C (50 mins) Day-3 Lecture (20 mins) Task-3A (50 mins) Task-3B (100 mins) Assignment- 1/2 (130 mins) Assignment- 1/2 (70 mins) Assignment- 1/2 (100 mins) Task-1: 5% Task-2: 15% (5% each for 2A, 2B and 2C) Task-3: 30% (10% for 3A and 20% for 3B) Assignment-1: 25% Assignment-2: 25% ASSESSMENT CRITERIA Tasks 1, 2 and 3 will be assessed at the end of every class. Students are encouraged to seek feedback on their tasks during the class so that they have the opportunity to correct/redraw. Assignment-1 and 2 has to be submitted at the end of Day-3 (For all groups who have been through Graphics cycle). For the groups who start with CATIA, Assigment-2 should be submitted by the end of their Graphics cycle. Students are encouraged to seek feedback on their assignment tasks during the class so that they have the opportunity to correct/redraw. Lecture in Day 2 will also include principles of drafting which does not have any assessable task. 3

4 INTRODUCTION 1. Part Design: Creating positive features from a sketch 2. Part Design: Creating negative features from a sketch 3. Part Design: Dress Up features including Threads 4. Plumbing Part 5. Examination of Complex Part 6. Assembly: Manipulation and Constraints 7. Structural Joint 8. Mechanical Assembly Background: CATIA, Version 5, Release 20, Dassault Systems Acronym for: Computer Aided Three dimensional Interactive Application Workbenches 1. Part Design workbench 2. Wireframe and Surface Design workbench 3. Assembly Design Workbench 4. Drafting workbench Fig. 1: Basic workbenches in CATIA CATPart CATPart is a file extension associated with all the files that are created in the Sketcher, Part Design, and Wireframe and Surface Design workbenches. CATProduct CATProduct is a file extension associated with all the files that are created in the Assembly Design workbench. CATDrawing CATDrawing is a file extension associated with all the files that are created in the Drafting workbench. 4

5 Mouse Operations 1. Select: Left (L) Button Click. For multiple selections hold the CTRL key along with the Left Button 2. Contextual menu: Right (R) Button Click 3. Object Manipulation: Mouse wheel, alone or in combination with L or R button - Hold the middle button and move right or left to pan the object - Press the centre and the right and hold to rotate the object - To zoom hold the middle button and the CTRL key Toolbars 1. Unpack and repack specific toolbars by dragging 2. Expand tools with sub-bars by selecting the black triangle (V) 3. If you accidentally close, restore the toolbars with Menu bar: Tools/Customize/Toolbars/Restore All Contents and Restore position. 1. Standard Toolbar This toolbar is common to all workbenches of CATIA V5. Fig. 3: The Standard toolbar 2. View Toolbar The buttons in the View toolbar are used for manipulating the view of the model. Fig. 4: The View toolbar 3. Sketcher Toolbar The Sketcher button in the sketcher toolbar is used to invoke the Sketcher workbench. After choosing the Sketcher button, select a plane, or a planar face to invoke the Sketcher workbench. You can select the plane and invoke the Sketcher or vice-versa. 5

6 Fig. 5: The Sketcher toolbar 4. Profile Toolbar The tools in the Profile toolbar are used to draw the sketches. It is one of the most important toolbars in the Sketcher workbench. Fig. 6: The Profile toolbar 5. Constraint Toolbar The tools in the Constraint toolbar are used to apply constraints to the geometric entities and assign dimensions to a drawn sketch. Fig. 7: The Constraint toolbar 6. Operation Toolbar The tools in the Operation toolbar are used to edit the drawn sketches. Fig. 8: The Operation toolbar 7. Sketch Tools Toolbar The tools in the Sketch Tools toolbar are used to set the sketcher settings such as setting the snap, switching between the standard and construction elements, and so on. 6

7 Fig. 9: The Sketch Tools toolbar Once the basic sketch is complete, you need to convert it into a feature. Choose the Exit Workbench (icon on the right side of the toolbar, an arrow pointing up) button from the Workbench toolbar and switch back to the Part Design workbench. The following toolbars of the Part Design workbench are discussed next. 8. Sketch-Based Features Toolbar The tools in the Sketch-Based Features toolbar are used to convert a sketch drawn in the Sketcher workbench into a feature. Fig. 10: The Sketch-Based Features toolbar 9. Dress-Up Features Toolbar The tools in the Dress-Up Features toolbar are used to apply the dress-up features such as fillet, chamfer, shell, and so on. Fig. 11: The Dress-Up Features toolbar 10. Transformation Features Toolbar The tools in the Transformation Features toolbar are used to apply the transformation features to the part such as moving, mirror, pattern, and so on. Fig. 12: The Transformation Features toolbar 7

8 Specification Tree The specification tree is a simplified file list. It keeps a track of all the operations that are carried out on the part. You can use the tree to selects parts on the drawing. And you can switch the tree ON and OFF using F3. To increase/decrease the font of the tree: hold the CTRL key and rotate the mouse wheel Fig. 13: The specification tree that appears on starting a new CATPart file Compass The compass is used to manipulate the orientation of parts, assemblies, or sketches. You can also orient the view of the parts and assemblies. Fig. 14: The compass Constraints Constraints are the logical operations that are performed on the selected element to define its size and location with respect to the other elements or reference geometries. 1. Geometric constraints, and 2. Assembly constraints Geometric Constraints Performed in the Sketcher workbench to define the size and position of a sketched element with respect to the other elements. 1. Distance: is used to apply a distance dimension between any two selected entities. 2. Length: is used to apply a linear dimension to the selected line. 3. Angle: is used to apply an angular dimension between any two selected lines. 4. Radius / Diameter: is used to apply a radius or a diameter to the selected circular entity. 5. Semimajor axis: is used to apply a dimension to the major axis of the selected ellipse. 6. Semiminor axis: is used to apply a dimension to the minor axis of the selected ellipse. 7. Symmetry: is used to force the selected sketched entities symmetrical about an axis. A line segment can be used as an axis. 8. Midpoint: is used to force a selected point to be placed on the midpoint of the selected line. 9. Equidistant point: is used to force a selected point to be placed at an equal distance from any two preselected points. 8

9 10. Fix: is used to fix a selected entity in terms of its position with respect to the coordinate system of the current sketch. 11. Coincidence: is used to make two points, two lines, a point and a line, or a point and a curve, coincident. 12. Concentricity: is used to make two circles, arc, an arc and a circle, a point and a circle, or a point and an arc, concentric. 13. Tangency: is used to force the selected line segment or curve to become tangent to another curve. 14. Parallelism: is used to force any two selected line segments to become parallel to each other. The selected line segments can also be axes. 15. Perpendicular: is used to force any two selected line segments to become perpendicular to each other. The selected line segments can also be axes. 16. Horizontal: forces the selected line segment to become horizontal. 17. Vertical: forces the selected line segment to become vertical. Assembly Constraints Performed in the Assembly design workbench to restrict the degree of freedom of the component and to define its precise location and position with respect to the other components of the assembly. 1. Coincidence: is used to force two selected entities to coincide with each other. 2. Contact: is used to force two selected faces to create a contact between each other. 3. Offset: is used to place two different selected faces, planes, or central axes at a distance with respect to each other. 4. Angle: is used to place two selected entities at an angle with respect to each other. 5. Fix: fixes the position of the selected part in the 3D space. 6. Fix Together: fixes the position of the two different selected parts with respect to each other. 7. Quick: is used to apply the most appropriate constraint to the elements in the current selection set. Sketch Constraints 1. Correct set of constraints are required for all engineering objects which is enforced in CATIA through the use of constraints. 2. Two forms of constraints are available: Quick and through Dialogue box. 3. There are some sketcher auto-constraints-origin, horizontal, vertical etc which do not appear in the tree. 4. Non-auto constraints can be deleted from the tree. 5. A fully constrained sketch is green, under-constrained is white and over-constrained is purple. Geometrical Set The geometrical set is defined as a body that includes the newly created planes, surfaces, wireframe elements, and reference elements. Feature A feature is defined as a basic building block of a solid model. The combination of various features results in a complete model. In the Part Design workbench, the features are of the following four types: 1. Sketch-based features. 2. Dress-up features. 3. Transformation features. 4. Surface-based features. Note 1. If you are trying to undo, and it shows undo empty selection, select the curve and then you can undo till you are happy. 2. Use Exit this workbench, icon on the right side of the toolbar an arrow pointing up. 9

10 TUTORIAL 1A: CREATING POSITIVE FEATURES Part Design (** Close the Assembly design workbench that is opened by default when starting CATIA before opening Part design workbench**) 1. Menu bar: Start/Mechanical Design/Part Design 2. Uncheck Hybrid design and Check Create a geometrical set. 3. Invoke the Sketcher (Paper and Pen Logo on the Right Toolbar) and select a Plane. You can select the plane and invoke the sketcher or vice versa. Initially, you can only sketch on the 3 Cartesian Planes, but once a Part is created, you can sketch on any of its planes or create auxiliary planes. 4. Prompts will appear in the lower region of the window as you move the mouse, i.e. in the Status bar. 5. Select/Tool or Tool/Select sequence is up to you but if you need to select multiple parts, select has to come first. 6. Infinite UNDO is possible, but tools must be switched off first. 7. If you modify a sketch, double click on it in the tree and do not start a new sketch. 8. Draw the sketch of the model using the Profile, Line, Arc, and Circle tools. 9. Use of the Pad Tool to create 3D parts. Take Pad thickness of 30mm. 10

11 DRAFTING In this section of the tutorial you will create a production drawing of the CATPart created in the previous lesson (Tutorial 1A). Drafting Workbench Toolbars There are thirteen (13) standard toolbars found in the Drafting Workbench. Commonly used toolbars including the tool name and a brief definition are shown below. 1. Drawing Toolbar The tools in the drawing toolbar are used to create a new sheet and new views. The user defines the view required. Fig: The Drawing toolbar 2. Views Toolbar The tools in the views toolbar are used to create different views and sections. Fig: The Views toolbar 3. Dress-up Toolbar The tools in the dress-up toolbar are used to fill areas, create lines and arrows. Fig: The Dress-up toolbar 11

12 4. Dimensioning Toolbar The tools in the dimensioning toolbar are used to create dimensions. Fig: The Dimensioning toolbar 5. Dimension Properties Toolbar The tools in the dimension properties toolbar are used to set the dimension line representation and the tolerance on a dimension. Fig: The Dimension Properties toolbar 6. Annotations Toolbar The tools in the annotations toolbar are used to create text, symbol and table. Fig: The Annotations toolbar 7. Text Properties Toolbar The tools in the text properties toolbar are used to modify the text and are identical to most Microsoft text products. Fig: The Text Properties toolbar 12

13 Fig: Drafting of a CATPart (Tutorial 1A) 13

14 TUTORIAL 2A: CREATING NEGATIVE FEATURES Part modification tools and their use 1. Pocket: Negative Pad: It s a tool to remove material from an existing object by extruding the sketch to a given depth condition. Take note that you can use the sketch in pocket to remove material in either direction. 2. Hole: Special Pocket: You can select any region in the object and invoke the Hole tool. It will ask for the diameter and has special features. Take note the Extension can be used to select the depth or surface while the type offers taper, countersunk, etc and details of thread if needed. 3. Groove: Negative Shaft: It is a tool for removing material from an object that requires an axis and a profile. It removes the material from the object by sweeping the profile about the axis. 4. Slot: Negative Rib: Take note for rib, it is not necessary to have the centre curve and the profile attached. For a slot you need a solid object, a profile and a centre curve. 5. Shell: Hollowed out solid: Indicate the wall thickness and the faces to remove. 14

15 TUTORIAL 2B: DRESS UP TOOLS Dress up tools and their use 1. Fillet: It is meant to round the edges or surfaces. 2. Chamfer: Meant to modify the edges with a plane. 3. Threads: Use the Hole tool to create these. Select appropriate type. Metric Thick pitch (M1, M10 etc) and notice that the pitch and hole diameter is automatically created. You will need to click on the hole to find the details of the thread as the details of the thread will not appear in the tree. 4. Pattern: Creating multiple copies such as holes/slots or any need for multiple instances within an object. 15

16 TUTORIAL 2C: CREATING PLANES AND HOLLOW TUBE The below sketch is for a Plumbers tube which is hollow and has a 45 degree joint. Use 100 mm as the outer diameter for all the pipes and, the length and the thickness of the pipes are for you to choose any value you want. The object should look similar to the one below. 16

17 TUTORIAL 3A: ASSEMBLY DESIGN Case 1: The ring is 10 mm from the surface of the base plate. Case 2: Create the base plate as a part and the bolts as another part. Create the assembly with 6 bolts and the base. For all the above examples, you are free to choose dimensions. Make sure they are constrained in the sketches. Fig.: Case 1 Fig.: Case 2 17

18 TUTORIAL 3B: Geroller Pump Assembly 18

19 Assignment-I: VARNAMO Milling Machine Shaft - Unserviceable/Damaged VARNAMO milling machine shaft will be provided in the class. - Apply reverse engineering technique and standard limit fits and tolerances from the provided catalogue to model the assembly. - Here is how it is expected to look like. 19

20 Assignment-II: BEAM ASSEMBLY - Use the standard dimensions from the catalogue provided. Here is how it is expected to look like. - You have to draw two universal beams and one square hollow section as shown below. - There are standard bolts, nuts and washers available in CATIA that are already drawn. You don t need to draw bolts, nuts and washers. During assembly you will bring them from CATIA library. 20

21 21

22 22

23 Square Hollow Sections 1 of 5 13/04/2011 7:56 AM Disclaimer: The information on this page has not been checked by an independent person. Use this information at your own risk. ROYMECH These Pages include various standards. To confirm the status of any standard, identify the replacement standard if it is obsolete and/or purchase the standard please use. BSI Shop It is also possible to become a BSI member and obtain copies of the Standards at much reduced prices. Home Steel Section Index Square Hollow Sections-Cold Formed..BS EN 10219:1997 Table of Dimensions + Properties Corner Radii Second Area of Radius of Section Plastic Torsional Constants Section Size Thick's Mass/m Moment of Section Gyration Modulus Modulus Surface Area Ext'l Int'l Area Inertia Modulus B T ro ri M/m A I r Z S J C As mm x mm mm mm mm kg/m cm 2 cm 4 cm cm 3 cm 3 cm 4 cm 3 m 2 /m

24 Square Hollow Sections 2 of 5 13/04/2011 7:56 AM

25 Square Hollow Sections 3 of 5 13/04/2011 7:56 AM

26 Square Hollow Sections 4 of 5 13/04/2011 7:56 AM

27 Square Hollow Sections 5 of 5 13/04/2011 7:56 AM Corner Radii Second Area of Radius of Section Plastic Torsional Constants Section Size Thick's Mass/m Moment of Section Gyration Modulus Modulus Surface Area Ext'l Int'l Area Inertia Modulus B T ro ri M/m A I r Z S J C As mm x mm mm mm mm kg/m cm 2 cm 4 cm cm 3 cm 3 cm 4 cm 3 m 2 /m Please Send Comments to Roy@roymech.co.uk Last Updated 04/04/2006 This Page is being developed Home Steel Section Index

28 Parallel Metric Keys and Keyway Dimensions Disclaimer: The information on this page has not been checked by an independent person. Use this information at your own risk. Click arrows to page adverts ROYMECH These Pages include various standards. To confirm the status of any standard, identify the replacement standard if it is obsolete and/or purchase the standard please use. BSI Shop It is also possible to become a BSI member and obtain copies of the Standards at much reduced prices. Home Keyways Index Keys and keyway Dimensions KeyWay /Key Dimensions keyways /keys dimension in accordance with BS :1972: Specification for metric keys and keyways - Parallel and taper keys Nominal Dia d Over Incl Key KeyWay Width b b x h width x thck Nom Depth Tolerance Class Shaft t 1 Hub t 2 Free Normal Close/Int Shaft H9 Hub D10 Shaft N9 Hub Js9 Shaft/Hub P9 Radius r Nom Tol Nom Tol Max min 6 8 2x2 2 +0,025 +0,06-0,004 +0,012-0,006 1,2 1,0 0,16 0, x ,02-0,029-0,012-0,031 1,8 1,4 0,16 0,08 +0,1 +0, x4 4 2,5 0 1,8 0 0,16 0,08 +0,03 +0, ,015-0, x5 5 3,0 2,3 0,25 0, ,030-0,030-0,015-0, x6 6 3,5 2,8 0,25 0, x7 8 +0,036 +0, ,018-0,015 4,0 +0,2 3,3 +0,2 0,25 0, x ,040-0,036-0,018-0,051 5,0 0 3,3 0 0,40 0, x8 12 5,0 3,3 0,40 0, x ,043 +0, ,021-0,018 5,5 3,8 0,40 0, x ,050-0,043-0,021-0,061 6,0 4,3 0,40 0, x ,0 4,4 0,40 0, x ,5 +0,2 +0,2 4, ,60 0, x ,052 +0, ,026-0,022 9,0 5,4 0,60 0, x ,065-0,052-0,026-0,074 9,0 5,4 0,60 0, x ,0 6,4 0,60 0, x ,0 7,4 0,6 0, x ,0 8,4 1,0 0,7 1:18:44 PM]

29 Parallel Metric Keys and Keyway Dimensions x ,062 +0, ,031-0, ,080-0,062-0,031-0,088 13,0 9,4 1,0 0, x ,0 10,4 1,0 0, x ,0 11,4 1,0 0, x ,0 +0,3 12,4 +0,3 1,6 1, x ,074 +0, ,037-0,032 20,0 0 12,4 0 1,6 1, x ,100-0,074-0,037-0,106 22,0 14,4 1,6 1, x ,0 15,4 2,5 2, x ,087 +0, ,043-0,037 28,0 17,4 2,5 2, x ,120-0,087-0,043-0,124 31, ,5 2,0 Key Dimensions Width b Thickness h Chamfer S Range Of Lengths Nom Tol(h9) Nom As indicated(h9/h11) Min Max From Inc 2 2 (h9) 0,16 0, , ,025 0,16 0, (h9) 0,16 0, ,25 0, , ,030 0,25 0, ,25 0, ,036 8 (h11) 0,40 0, ,40 0, ,090 0,40 0, , ,40 0, ,40 0, ,60 0, (h11) ,60 0, , ,110 0,60 0, ,60 0, ,60 0, ,00 1, (h11) 1,00 1, , ,130 1,00 1, ,00 1, ,60 2, ,60 2, , (h11) 1,60 2, ,160 2,50 3, ,50 3, , ,50 3, Standard keylengths (mm) :18:44 PM]

30 Parallel Metric Keys and Keyway Dimensions b>links Providing information on Keyways 1. Mitcalc.com...Excel based programme allowing detailed design of shaft connection (19 Eur) 2. Hercules -Keyways dimensions...download of keyway dimensions 3. Specifying Rectangular Keyways...MDmetric document - useful check information for my tables 4. Transeals - Keyways...Transeals - useful check information for my tables Send Comments to Roy Beardmore Last Updated 08/04/2012 This Page is being developed Home Keyways Index 1:18:44 PM]

31