EXPERIMENT NO: NAME OF EXPERIMENT: -01 2D & 3D CAD modelling methodology using package AutoCAD.

Transcription

1 SHRI SHIVAJI EDUCATION SOCIETY, AMRAVATI S, COLLEGE OF ENGINEERING & TECHNOLOGY, AKOLA Babhulgaon (JH) N.H.No.6, Akola DEPARTMENT OF MECHANICAL ENGINEERING COMPUTER SOFTWARE APPLICATIONS -I LAB. (5ME10) EXPERIMENT NO: - 01 NAME OF EXPERIMENT: -01 2D & 3D CAD modelling methodology using package AutoCAD. INTRODUCTION:- AutoCAD is a CAD software application for 2D and 3D design and drafting. It is developed and sold by Autodesk, Inc. first released in December 1982; AutoCAD was one of the first CAD programs to run on personal computers, notably the IBM PC. At that time, most other CAD programs ran on mainframe computers or mini-computers that were connected to a graphics computer terminal for each user. The term CAD (Computer Aided Design) applies to a wide range of programs that allow th user to created drawings, plans, and designs electronically. AutoCAD is one such program and it main claim to fame is that it is relatively easy to use, it is very comprehensive in its ability to create 2D and some 3D drawings, and it is very popular. Seventy percent of the CAD users in the world use AutoCAD.

2 COMMANDS USED IN AUTO CAD 1) Extend Command: The Extend command is use to lengthen drawn lines to meet the edges of other objects. When you use Extend command, you select lines as boundary edges and extend other lines to those edges. Procedures: 1- Select EXTEND from: - Modify Tool bar - Pull-Down menu - Type Extend at the command line. 2- Select boundary edges then press enter. 3- Select edge to extend then press enter to terminate the command. Example:

3 2) Trim Command The Trim command is use to shorten drawn lines to meet the edges of other objects. Procedures: 1- Select TRIM Command from: - Modify Tool bar - Pull-Down menu - Type Trim at the command line. 2- Select cutting edge then press enter. See figure below. 3- Select object to trim then press enter. See figure below. Example:

4 3) Offset Command The Offset command creates new object parallel to the original object at specified distance and direction. Procedures: 1- Select the Offset Command from: - Modify Tool bar - Pull-Down menu - Type Offset at the command line. 2- At Specify offset distance or [through]: Enter a value or pick a point on the screen. 3- At Select object to offset or <exit>: select the object. 4- At specify point on side to offset: pick a point on the screen you want to place the new object. 4) COPY Command In AutoCAD you can use Copy command to create duplicates of objects at different locations from the original. Procedures: 1- Select the Copy command from: - Modify Toolbar. - Modify pull-down menu -Type Copy at command line. 2- Select the object you want to copy and Enter. 3- At the "Specify the base point or displacement" Pick a point on the object. This point will serve as handle for the object.

5 4- At the "Specify second point or displacement" pick a point on the screen or enter distance. You can create multiple copies without leaving the copy command. 5) Mirror Command: The mirror command creates a mirror image of objects. Mirror command is useful for objects that present symmetry. You draw half of the object and you mirror the other half. Procedures: 1- Select Mirror command from: - Modify Tool bar - Pull-Down menu - Type Mirror at the command line. 2- Select object then press enter. 3- At Specify first point of mirror line, select P1, see figure below. 4- At Specify second point of mirror line, select P2, see figure below. 5- At Delete source object? [Yes/No] <N>. Press enter. Example:

6 6) MOVE Command: This AutoCAD command will allow you to move the original objects at specified distance in a specified direction. Procedures: - Modify Toolbar - Modify from the Pull-Down Menu\ - Type M for move at the command line and press enter. Example: 7) Erase Command: The erase command is used to delete selected objects from you drawing. Procedures: - Modify Toolbar. - Pull-down Menu. - Command line: Type erase or e then press enter. Procedure: 1- Choose one the method described above to activate Erase Command. 2- Select the object to erase then press enter.

7 8) SCALE Command: Enlarges or reduces selected objects, keeping the proportions of the object the same after scaling Procedures: 1- Select Scale command from: - Modify Toolbar. - Pull-down Menu. - Command line: Type Scale then press enter. 2- Select object then press enter. 3- Specify the base point 4- Enter Scale factor 9) ROTATE Command: Rotates objects around a base point Procedures: 1- Select Scale command from: - Modify Toolbar. - Pull-down Menu. - Command line: Type Rotate then press enter. 2- Select object then press enter. 3- Specify the base point 4- Rotate the object according base point Function and Accelerator Keys F1 Online Help F2 Flipscreen F3 Osnap ON/OFF F4 Tablet On/Off F5 Isoplane Toggle F6 Coords On/Off

8 F7 Grid On/Off F8 Ortho On/Off F9 Snap On/Off F10 Polar On/Off F11 Object Snap Tracking ON/OFF Press CTRL + A to turn GROUPS on/off. Press CTRL + B to turn SNAP on/off. Press CTRL + C to COPYCLIP Press CTRL + D to turn COORDS on/off. Press CTRL +E to Toggle Isoplane settings. Press CTRL +F to turn Osnaps ON/OFF Press CTRL + G to turn GRID on/off. Press CRTL + K for Hyperlinks Press CTRL + L to turn ORTHO ON/OFF Press CTRL + N to create a NEW drawing.* Press CTRL + O to OPEN an existing drawing.* Press CTRL + P to PLOT a drawing.* Press CTRL + S to qsave a drawing.* Press CTRL + T to turn the digitizing tablet on/off. Press CTRL + X to cut to Clipboard.* Press CTRL + Z to UNDO 2D MODELING OF FOLLOWING OBJECTS

9

10 SHRI SHIVAJI EDUCATION SOCIETY, AMRAVATI S, COLLEGE OF ENGINEERING & TECHNOLOGY, AKOLA Babhulgaon (JH) N.H.No.6, Akola DEPARTMENT OF MECHANICAL ENGINEERING COMPUTER SOFTWARE APPLICATIONS -I LAB. (5ME10) EXPERIMENT NO:- 02 NAME OF EXPERIMENT: - Creation of 2D Drawing (Sketching module) of any three mechanical machine component using Pro/ENGINEER. INTRODUCTION:- Pro/ENGINEER is a parametric, integrated 3D CAD/CAM/CAE solution created by Parametric Technology Corporation (PTC). It was the first to market with parametric, feature-based, associative solid modeling software. The application runs on Microsoft Windows platforms, and provides solid modeling, assembly modeling and drafting, finite element analysis, and NC and tooling functionality for mechanical engineers. Pro/ENGINEER is a fully associative system. This means that a change in the design model anytime in the development process is propagated throughout the design, automatically updating all engineering deliverables, including assemblies, drawings, and manufacturing data. Associatively makes concurrent engineering possible by encouraging change, without penalty, at any point in the development cycle. This enables downstream functions to contribute their knowledge and expertise early in the development cycle. This software has widely used in industries for modeling purpose. Following are few basic important working notes to get acquainted with this software. Pro/E also allows operator the flexibility of using sketched and parametric based design Pro/E is the power operator expect. It is the leading edge technology starting with project concept trough design assembly tasting manufacturing and modeling to rendering capabilities.

11 Introducing Sketcher Module Sketcher is the most important tool for creating features in Pro/E. It is therefore critical that you have a good understanding of how it works. We will take a few minutes here to describe its basic operation and will explore the Sketcher tools continually through the next few lessons. It will take you a lot of practice and experience to fully appreciate all that it can do. Basically, Sketcher is a tool for creating two-dimensional figures. These can be either stand-alone features (Sketched Curves) or as embedded elements that define the cross sectional shape of some solid features. The aspects of these figures that must be defined are location, shape, and size, roughly in that order. The sketching plane where we will create the 2D sketch is defined or selected first. Then, within Sketcher the location is further specified by selecting references to existing geometry. You will find the usual drawing tools for lines, arcs, circles, and so on, to create the shape. Finally, you can specify alignments or dimensions to control the size of the sketch and its relation to existing geometry. Sketcher is really quite smart, that is, it will anticipate what you are going to do (usually correctly!) and do many things automatically. Occasionally, it does make a mistake in guessing what you want. So, learning how to use Sketcher effectively involves understanding exactly what it is doing for you (and why) and discovering ways that you can easily over-ride this when necessary. The shape of the sketch but also in how constraints and dimensions are applied to the sketch so that it is both complete and conveys the important design goals for the feature. In Wildfire 4.0, some very useful new tools have been introduced in Sketcher. These make it considerably easier to diagnose errors in sketches (such as duplicated edges) or improper sketches (such as open curves for features that

12 require closed curves). We will investigate these tools by intentionally introducing some errors into our sketches.

13

14 Sketcher Toolbar Flyout Buttons 2D MODELING OF FOLLOWING OBJECT

15

16 SHRI SHIVAJI EDUCATION SOCIETY, AMRAVATI S, COLLEGE OF ENGINEERING & TECHNOLOGY, AKOLA Babhulgaon (JH) N.H.No.6, Akola DEPARTMENT OF MECHANICAL ENGINEERING COMPUTER SOFTWARE APPLICATIONS -I LAB. (5ME10) EXPERIMENT NO: - 3 NAME OF EXPERIMENT: - Creation of 3D drawing (part Module) of mechanical machine parts using Pro-E.

17 Pro/ENGINEER Feature Overview Below (and/or to the right of) the datum creation buttons in the right toolbar are three other groups of buttons. These are shown in Figures 7, 8, and 9. If you move the cursor over the buttons, the tool tip box will show the button name. Two of these menus contain buttons for creating features, organized into the following categories: Placed Features (Figure 7) - (holes, rounds, shells,...) These are features that are created directly on existing solid geometry. Examples are placing a hole on an existing surface, or creating a round on an existing edge of a part. Sketched Features (Figure 8) (extrusions, revolves, sweeps, blends,..) These features require the definition of a two-dimensional cross section which is then manipulated into the third dimension. Although they usually use existing geometry for references, they do not specifically require this. These features will involve the use of an important tool called Sketcher. The final group of buttons (Figure 9) is used for editing and modifying existing features. We will deal with some of these commands (Mirror and Pattern) later in the Tutorial. In this lesson we will be using the Extrude command to create two types of sketched features (a protrusion and a cut). In the next lesson, we will use the Hole, Round, and Chamfer commands to create three placed features. Before we continue, though, we must find out about an important tool - Sketcher.

18 3D MODELING OF FOLLOWING OBJECT

19

20

21 SHRI SHIVAJI EDUCATION SOCIETY, AMRAVATI S, COLLEGE OF ENGINEERING & TECHNOLOGY, AKOLA Babhulgaon (JH) N.H.No.6, Akola DEPARTMENT OF MECHANICAL ENGINEERING COMPUTER SOFTWARE APPLICATIONS -I LAB. (5ME10) EXPERIMENT NO:-04 NAME OF EXPERIMENT: - Creation of 3D drawing (part Module) of any three mechanical machine parts using CATIA. INTRODUCTION CATIA (Computer Aided Three dimensional Interactive Application) is a multiplatform PLM/CAD/CAM/CAE commercial software suite developed by Dassault Systemes and marketed world-wide by IBM. It was used by Frank Gehry in his building of the Guggenheim Museum Bilbao. CATIA is written in the C++ programming language using the Standard Template Library. Catia V5 software solution,addresses advanced mechanical process centric design requirement.in addtion to leading edge featur-based design function,it includes highly productive capabilities for the design of mechanical assemblies and for drawing generation. catia v5 is avilable on both unix and windows enviroments. Also as an open solution,it includes interfaces with the most commonly used data exchange industry standards. Catia V5 features a parametric solid/surface-based package which uses NURBS as the core surface representation and has several workbenches that provide KBE support. 3DXML is the basis for model visualization, persistence, and distribution.as of 2007, the latest release is V5 release 17 (V5R17).One of the main reasons customers choose CATIA V5 is its ability to seamlessly interact

22 and work in tandem with a host of other applications like Enovia, Smarteam, various CAE Analysis applications etc. COMMANNDS USED

23

24 MODELING OF OBJECT

25

26 SHRI SHIVAJI EDUCATION SOCIETY, AMRAVATI S, COLLEGE OF ENGINEERING & TECHNOLOGY, AKOLA Babhulgaon (JH) N.H.No.6, Akola DEPARTMENT OF MECHANICAL ENGINEERING COMPUTER SOFTWARE APPLICATIONS -I LAB. (5ME10) EXPERIMENT NO: - 5 NAME OF EXPERIMENT: - Creation of an assembly using (assembly module) various machine 3D parts using Pro-E modeling software. Pro/E Assembly Module General Procedure 1. Open Pro/E 2. File New 2.1. Select Assembly bullet under Type 2.2. Select Design bullet under Sub-type 2.3. Name assembly 2.4. Uncheck Use Default Template 2.5. Select OK

27 3. In New File Options window: 3.1. Choose desired template Select mmns_asm_design template for SI units Select inlbs_asm_design template for English units 3.2. Fill in Description and Modeled By (optional) 3.3. Select OK 4. Import first part 4.1. Select Add component to the assembly icon 4.2. Select (partname).prt Open 4.3. Select green check mark to establish placement 5. Import additional parts 5.1. Select Add component to the assembly 5.2. Select (partname).prt Open 5.3. Select Placement on the dashboard to define placement constraints 5.4. Select desired constraint type under Constraint Type menu Mate constrains two surfaces in the same plane facing each other Align constrains two surfaces in the same plane facing the same direction Insert aligns the axes of two cylindrical surfaces 5.5. For mate or align constraints, select Coincide, Oriented, or specify Offset Distance 5.6. Select New Constraint to add additional placement constraints

28 5.7. Select green check mark to establish placement 6. Moving Parts 6.1. Left click part to be moved select Edit Definition 6.2. Select Move on the component placement dashboard 6.3. Orient Mode Orients part with respect to the assembly Left click in workspace to activate Orient mode Middle mouse click and drag to rotate part relative to assembly coordinates 6.4. Translate translates part along a specified linear or planar reference To translate in view plane, select Relative in view plane To specify a reference for translation, select Motion Reference

29 Select translation reference surface, plane, edge, or axis in workspace If a surface is selected for a reference, specify Normal or Parallel Define translation increments in Translation menu (e.g. smooth, 1, 5, etc.) Left click in workspace and drag to translate 6.5. Rotate rotates part relative to a specified axis To rotate in view plane, select Relative in view plane To specify a reference for rotation, select Motion Reference Select rotation reference surface, plane, edge, or axis in workspace If a surface is selected for a reference, specify Normal or Parallel Define rotation increments (degrees) in Rotation menu (e.g. smooth, 1, 5, etc.) Left click in workspace and drag to rotate 6.6. Adjust adjusts the part so that a specified surface is aligned with a reference plane or surface

30 To adjust surface to view plane, select Relative in view plane To specify a reference plane or surface, select Motion Reference Select reference surface or plane in workspace Select Mate or Align (see & above) Select the part s reference surface in workspace to be adjusted Specify offset distance if desired 6.7. Select green check mark to establish placement 7. Creating and Editing Parts within the Assembly 7.1. Select Create component in assembly model Name part OK In the Creation Options window, select Empty for the Creation Method 7.2. To edit parts in the assembly: Right click part to be edited in Model Tree Select Activate Create additional part features To edit part features, right click on part in Model Tree and select Open 7.3. To return to assembly mode:

31 Select (assembly model name).asm under Window menu (if a part window is active) Right click the assembly model in Model Tree Select Activate 8. Changing color and texture of parts 8.1. View Color and Appearance MODELING OF ASSEMBLY OBJECT

32 Assembled View

33 SHRI SHIVAJI EDUCATION SOCIETY, AMRAVATI S, COLLEGE OF ENGINEERING & TECHNOLOGY, AKOLA Babhulgaon (JH) N.H.No.6, Akola DEPARTMENT OF MECHANICAL ENGINEERING COMPUTER SOFTWARE APPLICATIONS -I LAB. (5ME10) EXPERIMENT NO: - 5 NAME OF EXPERIMENT: - Creation of 3D detailed part for any sheet metal components is using 3D Product modeling software. Sheet metal modeling in Pro/E consists of a different set of features that help us to create Sheet metal model faster and more accurate. Features like bend, unbend, punch, Sheet metal cut, corner relief, form, extended wall, flat pattern etc are created for Sheet metal part modeling. Most of the Pro/E Sheet metal features are still using the menu manager (pre- Wildfire) interface. For example: none of Sheet metal feature was being modernized in Pro/E Wildfire. Only two features (create flat wall and create flange wall) were modernized in Pro/E Wildfire 4.0 and new interface for first wall and Sheet metal cut is introduced in Pro/E Wildfire 4.0. As what I can say, so far, more than 50% of the Sheet metal feature has not been modernized yet. There are many Wildfire users who are not familiar to the old interface. This tutorial is created base on Pro/ENGINEER Wildfire To create a new Sheet metal part, click new, then select part and Sheet metal in the dialog box.

34 2. A set of Sheet metal icons appear to you. You should notice that almost all the icons are set inactive except the unattached wall. Let us create the first wall of Sheet metal part using unattached flat wall. 3. The unattached flat wall s dialog box and menu manager appears. The system is now waiting for the sketching plane input.

35 4. Pick the plane which you want to start a sketch

36 5. Next, you will need to specify the sketching plane direction. Choose the direction and pick Okay 6. After that specify the view orientation for your sketch. Pick default for default orientation 7. You are now entering the sketch mode. Sketch the desire shape and press the check button

37 8. At the message area, you will need to input the Sheet metal thickness. After that, click the OK button in the dialog box to confirm the feature creation. 10. Sheet metal flat wall is created.