Aim: To Analyze the Analysis of Cantilever Beam



SRI VENKATESWARA COLLEGE OF ENGINEERING AND TECH

(AUTONOMOUS)

RVS NAGAR, CHITTOOR-517127

DEPATMENT OF MECHANICAL ENGINEERING

M Tech I SEM (R-15)

COMMON TO CAD/CAM &MACHINE DESIGN

2015-16

MODELLING LAB

LABORATORY MANUAL

Prepared by

DEPATMENT OF MECHANICAL ENGINEERING

SRI VENKATESWARA COLLEGE OF ENGINEERING AND TECHNOLOGY

RVS NAGAR, CHITTOOR-51712

LIST OF EXPERIMENTS

SOLIDWORKS

1. MODELLING OF AN AUTOMOBILE WHEEL

2. ASSEMBLY DRAWING OF SCREW JACK

3. ASSEMBLY OF PLUMMER BLOCK

4. ASSEMBLY OF FLANGE COUPLING

5. DRAFTING OF SOLID JOURNAL BEARING

CATIA V5

6. 2D DRAWING BY USING SKETCHER WORKBENCH

7. 3D MODELLING OF A PART DRAWING

8. ASSEMBLY DRAWING OF STUFFING BOX

9. ASSEMBLY OF KNUCKLE JOINT

Solid Works

BASICS OF SOLIDS MODELING WITH SOLIDWORKS

Introduction

Solid Works is the state of the art in computer-aided design (CAD). Solid Works represents an object in a virtual environment just as it exists in reality, i.e., having volume as well as surfaces and edges. This, along with exceptional ease of use, makes Solid Works a powerful design tool. Complex three-dimensional parts with contoured surfaces and detailed features can be modeled quickly and easily with Solid-Works. Then, many parts can be assembled in a virtual environment to create a computer model of the finished product. In addition, traditional engineering drawings can be easily extracted from the solids models of both the parts and the final assembly. This approach opens the door to innovative design concepts, speeds product development, and minimizes design errors. The result is the ability to bring high-quality products to market very quickly.

CONSTRAINT-BASED SOLIDS MODELING

The constraint-based solids modeling used in Solid Works makes the modeling process intuitive. The 3-D modeling begins with the creation of a 2-D sketch of the profile for the cross section of the part. The sketch of the cross section begins much like the freehand sketch of the face of an object. The initial sketch need not be particularly accurate; it needs only to reflect the basic geometry of the part’s cross-sectional shape. Details of the cross section are added later. The next step is to constrain the two-dimensional sketch by adding enough dimensions and parameters to completely define the shape and size of the two-dimensional profile. The name constraint-based modeling arises because the shape of the initial two-dimensional sketch is “constrained” by adding dimensions to the sketch. Finally, a three-dimensional object is created by revolving or extruding the two-dimensional sketched profile. Figure 1 shows the result of revolving a simple L-shaped cross section by 270o about an axis and extruding the same L-shaped cross section along an axis.

In either case, these solid bodies form the basic geometric solid shapes of the part. Other features can be added subsequently to modify the basic solid shape. Once the solids model is generated using Solid Works, all of the surfaces have been automatically defined, so it is possible to shade it in order to create a photorealistic appearance. It is also easy to generate two-dimensional orthographic views of the object. Solid modeling is like the sculpting of a virtual solid volume of material. Because the volume of the object is properly represented in a solids model, it is possible to slice through the object and show a view of the object that displays the interior detail (sectional views). Once several solid objects have been created, they can be assembled in a virtual environment to confirm their fit and to visualize the assembled product. Solids models are useful for purposes other than visualization. The solids model contains a complete mathematical representation of the object, inside and out. This mathematical representation is easily converted into specialized computer code that can be used for stress analysis, heat transfer analysis, fluid-flow analysis, and computer-aided manufacturing. Getting Started in Solid Works Introduction and Reference Solid Works Corporation developed Solid Works® as a three-dimensional, feature-based, solids-modeling system for personal computers.

Solid modeling represents objects in a computer as volumes, rather than just as collections of edges and surfaces. Features are three-dimensional geometries with direct analogies to shapes that can be machined or manufactured, such as holes or rounds. Feature-based solid modeling creates and modifies the geometric shapes of an object in a way that represents common manufacturing processes. This makes Solid Works a very powerful and effective tool for engineering design. As per other computer programs, Solid Works organizes and stores data in files. Each file has a name followed by a period (dot) and an extension. There are several file types used in Solid Works, but the most common file types and their extensions are Part files .prt or .sldprt Assembly files .asm or .sldasm Drawing files .drw or .slddrw

Part files are the files of the individual parts that are modeled. Part files contain all of the pertinent information about the part. Because Solid Works is a solids-modeling program, the virtual part on the screen will look very similar to the actual manufacture part. Assembly files are created from several individual part files that are virtually assembled (in the computer) to create the finished product.

Assembly files are the two dimensional engineering drawing representations of both the part and assembly file. The drawings should contain all of the necessary information for the manufacture of the part, including dimensions, part tolerances, and so on. The part file is the

driving file for all other file types. The modeling procedure begins with part files. Subsequent assemblies and drawings are based on the original part files. One advantage of Solid Works files is the feature of dynamic links. Any change to a part file will automatically be updated in any corresponding assembly or drawing file.

Tool bars:

The Sketch toolbar contains tools to set up and manipulate a sketch.

• The Sketch Tools toolbar contains tools to draw lines, circles, rectangles, arcs, and so on.

• The Sketch Relations toolbar contains tools for constraining elements of a sketch by using dimensions or relations.

• The Features toolbar contains tools that modify sketches and existing features of a part.

• The Standard toolbar contains the usual commands available for manipulating files (Open, Save, Print, and so on), editing documents (Cut, Copy, and Paste), and accessing Help.

The Standard Views toolbar contains common orientations for a model.

• The View toolbar contains tools to orient and rescale the view of a part.

• Line: creates a straight line.

• Center point Arc: creates a circular arc from a center point, a start point and an end point.

• Tangent Arc: creates a circular arc tangent to an existing sketch entity.

• 3 Pt Arc: creates a circular arc through three points.

• Circle: creates a circle.

• Splines: creates a curved line that is not a circular arc.

• Polygon: creates a regular polygon.

• Rectangle: creates a rectangle.

• Point creates: a reference point that is used for constructing other sketch entities.

• Centerline: creates a reference line that is used for constructing other sketch entities.

Convert Entities: creates a sketch entity by projecting an edge, curve, or contour onto the sketch plane.

• Mirror: reflects entities about a centerline.

• Fillet: creates a tangent arc between two sketch entities by rounding an inside or an outside corner.

• Offset: Entities creates a sketch curve that is offset from a selected sketch entity by a specified distance.

• Trim: removes a portion of a line or curve.

1.AUTOMOBILE WHEEL

AIM:

To model the given object using the Revolve and circular pattern feature as per the dimensions given.

PROCEDURE:

1. Create a 2D sketch on Front Plane as shown in the figure.

2. (Right click the Front plane>insert sketch and draw the 2D sketch)

[pic]

Note: All the 2D sketches drawn should be fully Defined and there should not be any under defined) and use ( click Add Relation and Smart Dimensions)

3. Revolve, the sketch to 360 degree on top sketched line, by (Insert> Boss/Base>Revolve)

ok.

[pic]

4. Create circle of 2D sketch of Diameter of 121.92 mm, on right plane and extrude to 50.8mm (Select the face by (Enter Space bar> double click the Normal plane) and Draw the 2D sketch as given above

Extrude by (Insert>Boss/Base>Extrude)) ok.

[pic][pic]

5. Draw the sketch on edge wheel face, sketch for arm hole ,

Select the face by (Enter Space bar> double click the Normal plane)

And Draw the 2D sketch as given below

[pic]

6. And remove the material by (Insert>cut>Extrude), through all, OK.

[pic]

7. Add fillet R12.7mm inner(Insert>Features>Fillet/Round),add fillet 5.08mm for corner ok

[pic][pic]

8. Click Circular Pattern ,click (View>Temporary Axes,) select center axis as rotation axis

[pic]

9. ( Give 360 degree and 5 equal spacing) , Select Cut-Extrude1, Fillet1 and Fillet2 as a Features to Pattern. OK.

[pic]

10. Click on hub face, insert sketch, sketch center circle diameter 69.85mm. Extrude Cut to 12.7mm deep.

(Insert>cut>Extrude).

[pic]

11. Add chamfer 12.7mm to inner cut and add chamfer 6.35mm to wheel edge ok done. (Insert>Feature>chamfer).

[pic]

Result:

Thus the given model is complete.

2.PART & ASSEMBLY DRAWING OF SCREW JACK

AIM:

To model and assemble the Screw jack as per the dimensions given and also convert the 3D model into different views.

Description about Screw jack:

A Screw Jack, manually operated is a contrivance to lift heavy object over a small height with a distinct Mechanical Advantages. It also serves as a supporting aid in the raised position. A screw Jack is actuated by a square threaded screw worked by applying a moderate effort at the end of a Tommy bar inserted into the hole of the head of the screw. The body of the screw jack has an enlarged circular base which provides a large bearing area. A gun metal nut is tight fitted into the body at the top. A screw spindle is screwed through the nut. A load bearing cup is mounted at the top of the screw spindle and secured to it by a washer and a CSK screw. When the screw spindle is rotated, the load bearing cup moves only up or down along with the screw spindle but will not rotate with it. The Tommy bar is inserted into the hole in the head of the screw spindle only during working and will be detached when not in use.

[pic][pic]

Procedure:

1. Model different parts of a Screw Jack using Extrude, Revolve and features.

2. Select the assembly in solid works main menu.

3. Using Insert component icon of property manager, insert base component & next components to be assemble.

4. Assemble using MATE Feature.

5. Continue the inserting the component & mating until the entire component are

assembled.

6. Save the assembly.

7. From the main menu of solid works select the drawing option.

8. Drawing icon in main menu of Solid works

9. Select the drawing sheet format size as – A4 Landscape.

10. Using the model view manager browse the document to be open.

11. Click the view orientation from the model view manager & place the drawing view in the proper place in the sheet.

12.Using the placed view as parent view project the other or needed views

13. Move cursor to any one view and right click the mouse button.

14. Select the Table – BOM.

15. Place the BOM in the proper place in the drawing sheet.

16. Save the drawing sheet.

Result:

Thus the given Screw Jack is modeled; assembled & different views are taken

[pic]

[pic]

4.ASSEMBLY OF PLUMMER BLOCK

Aim:

To model and assemble the Plummer block as per dimension given and also convert the 3D model into different views with bill of materials..

System Requirements:

➢ Personal computer

➢ Solid modeling software (solid edge).

Bill of materials:

|Part no |Description |Material |Numbers |

|1 |A cap |Cast iron |1 |

|2 |Spilt bushes |Brass |2 |

|3 |Square head bolts |Fe 410 w |2 |

|4 |Hexagonal nuts |Fe 410 w |2 |

|5 |Shaft |Fe 410 w |1 |

|6 |Body |Cast iron |1 |

Description:

➢ When a long shaft is to be supported at intermediate points, bushed bearing are not used due to their limitations. In such cases plummer blocks are used.

➢ In the plummer block bearing, the body is split horizontally along or near axis of the shaft. This will enable to overcome the disadvantage of the bushed bearings.

➢ The bottom of the body is relieved leaving a narrow machined strip all rounds and it reduces the extent of preparation and leveling of the bearing area relatively.

Split bush is fitted in the body, the projecting snug of the split bush fits into the corresponding hole drilled in the body. This prevents the rotation of the bushes along with the shaft and axial movement of the split bushes are prevented by collars.

➢ After assembling a small clearance will be left between cap and the body. This clearance enables to provide the necessary clamping grip.

Commands used:

The following commands are used in the creation of components and assembly of flanged coupling.

➢ Protrusion

➢ Coincident plane

➢ Cutout

➢ Round

➢ chamfer

➢ Mate

➢ Axial align

➢ Panel align

➢ Trim

Procedure:

➢ Model different parts of a plummer block using extrude, revolve features.

➢ Select the drawing in solid works main menu.

➢ Using inset component icon of property manager, insert base component and next components to assemble.

➢ Assemble using mate feature.

➢ Continue the inserting components and waiting until the entire components are assembled.

➢ Save the assembly.

➢ From the main menu of solid works select the drawing option.

➢ Select the drawing sheet format as A4 landscape.

➢ Using model view manager, browse the document to be open.

➢ Click the view orientation from the model view manager.

➢ Place the drawing view in the proper place in the sheet.

➢ Using the placed view as parent view, project the other or needed views.

➢ Move cursor to anyone view and right click the muse button.

➢ Place the BOM in the proper place in the drawing sheet.

¬ Save the drawing sheet.

COMPONENTS OF PLUMMER BLOCK

ASSEMBLY OF PLUMMER BLOCK

[pic]

PLUMMER BLOCK

Result:

Thus the plummer block is modeled; assembled and different views are taken.

5.ASSEMBLY OF FLANGE COUPLING

Aim:

To create the components of the flange coupling and assemble them using to parametric feature based on solid modeling software.

System Requirements:

➢ Personal computer

➢ Solid modeling software (solid edge).

Bill of materials:

|Part no |Description |Material |Numbers |

|1 |Flange |Cast iron |2 |

|2 |shaft |Fe -410 w |2 |

|3 |Taper key |Fe - 410 w |2 |

|4 |Hex.bolt |Fe - 410 w |4 |

|5 |Hex.bolt |Fe - 410 w |4 |

Description:

❖ A flange coupling usually applies to a coupling having two separate cast icon flanges. Each flange is mounted on the shaft end and keyed to it.

❖ The faces are turned up at right angle to the axis of the shaft. One of the Flange has a projected portion and the other flange has a corresponding recess. This helps to bring the shafts into line and to maintain alignment. the two flanges are coupled together by means of bolts and nuts. The flange coupling is adopted to heavy loads and hence it is used on large shafting. The flange couplings are of the following three types.

1. Unprotected type flange coupling

2. Protected type flange coupling.

3. Machine type flange coupling

In main type flange coupling, the flanges are forged integral with the shafts.

Commands used:

The following commands are used in the creation of components and assembly of flanged coupling.

➢ Protrusion

➢ Coincident plane

➢ Cutout

➢ Revolved protrusion

➢ Revolved cutout

➢ Mate

➢ Axial align

➢ Panel align

➢ Trim

Procedure:

➢ Using sketch protrusion, fillet, contour and pattern command as flange is created.

➢ Using sketch protrusion and cutout command shaft end is created.

➢ Using sketch protrusion command a taper key is created.

➢ Using sketch &protrusion command a hexagonal bolt is created. Similarly hexagonal nut is created.

➢ Using axial align, planar align command flange and shaft are assembled.

➢ Using mate command, taper key is positioned.

➢ This assembly is inserted twice in an assembly window and mated together by mate command.

➢ Bolts and nuts are assembled by using axial align and mate command respectively.

Result:

Thus the components of flange coupling are created and assembled successfully

5.DETAIL DRAWING OF SOLID JOURNAL BEARING

AIM:

To model the given object using the Extrude and wizard hole & Revolve feature as per the dimensions given.

1.Create a 2D sketch on Front Plane as shown in the figure.

(Right click the Front plane>insert sketch and draw the 2D sketch)

Note: All the 2D sketches drawn should be fully Defined and there should not be any under defined) and use (click Add Relation and Smart Dimensions)

2. Extrude, the sketch to 35mm(Normal to sketch), by (Insert> Boss/Base>Extrude) ok.

3.Move plane to center of geometry(InsertRevolve) ok.

5. 2D sketch of hole drawn should be fully Defined and there should not be any under defined) and use (click Add Relation and Smart Dimensions) and remove material (Inser>Boss/Base>Extrude).

6. Create Mirror the sketch object.(insert>pattran/mirror>mirror)

7. Create details drawing of solid journal bearing(File>make drawing from part> yes>set the A4 drawing size sheet.

8.Create dimensions(Insert>Model items>information form>entire model>OK.

Result:

Thus the given model is completed.

CATIA V5

Introduction

CATIA Version 5 Basic Concepts

Upon completion of this course the student should have a full understanding of the following topics:

- Managing models (opening, closing, saving, etc)

- Solutions, Workbenches and Toolbars

- Tools, Options

- Tools, Customize

- Manipulation

- View Toolbar

- Specification Tree

- Modifying properties

- Applying materials to parts

- Creating axis systems

- Searching

- Measuring

Toolbars

As mentioned before, the different workbenches contain different toolbars. Although some toolbars will appear in almost every workbench. This section will discuss how to customize your toolbars.

In most of the workbenches, there are too many toolbars to display in one column or row along the right side of the screen and along the bottom of the screen. In this case, it is important to move the toolbars around so that you can view all of them. If you can’t view a toolbar, then you can’t use the toolbar.

If toolbars are off the screen, chevrons will generally appear as shown below.

Having toolbars hidden off the screen isn’t very helpful since you can’t pick any of the icons on them. Therefore, it is a good idea to move the toolbars so you can see them completely

You can drag toolbars around by selecting and holding the handler bar.

Select the handler bar as shown below on the Sketch-Based Features toolbar.

Drag the toolbar out into the display. It should appear as shown.

While holding down on the handler bar, select the Shift key on the keyboard. Notice that the toolbar toggles to be horizontal instead of vertical. If you let go of the handler bar while the shift key is pressed, the toolbar will remain in the horizontal position.

Select the “x” in the corner of the toolbar to turn the toolbar off. The toolbar disappears

Select the View pull down menu and move your cursor over the Toolbars option. This provides a list of all of the available toolbars within this workbench.

Select Sketch-Based Features to turn the toolbar back on. Every toolbar that has a checkmark beside it in the list is turned on.

This is a good place to look if you can’t find a toolbar. We will discuss a way to set all of the toolbars back to the default later on.

Select the handler for the toolbar and drag it over to the right side and drop it next to the column of toolbars. If you get it close enough, it will create a second column as shown. If you get it too close, it will add it back into the first column

Position the toolbars as shown so that all of them can be see

This will make finding toolbars much more convenient later on.

Tools Customize

Tools, Customize contains a number of options allowing you to customize certain aspects of the CATIA workbenches.

Select the Tools pull down menu and select Customize. The Customize window appears.

Start Menu

This allows you to specify what workbenches you want available to you on the start menu. You can also access these workbenches by selecting the workbench icon on each workbench. Whatever is listed in the Favorites area will be available when you select the workbench icon and they will be listed at the top of the pull down menu Start.

Available List of all of the available workbenches within CATIA V5

Favorites List of workbenches that you will use on an everyday basis

Moves workbenches from one side to the other

Move the Assembly Design, Generative Shape Design and Part Design workbenches from the Available frame to the Favorites frame as shown. You may select the

workbenches and then select the arrows ([pic]) to move them back and forth or you may drag and drop the workbenches within the two frames.

Select Close.

Select the Start pull down menu. The menu displays. Notice that the three workbenches that you chose as your favorites display at the top of the menu.

Select the Part Design workbench icon. [pic] The Welcome to CATIA V5 window displays. This icon is located in the toolbars along the right side of the display, near the top.

Notice that the three favorite workbenches that were chosen display here as well. This provides another method for switching between workbenches.

Select Generative Shape Design. You are switched into the Generative Shape Design.

Select the Start pull down menu and select Part Design from the favorites at the top of the menu. You are switched back into the Part Design workbench.

Select the Tools pull down menu and select Customize again. The Customize window appears.

Select the User Workbenches tab.

User Workbenches

This allows you to define your own workbenches with your own toolbars on the workbench.

Toolbars

This allows you to modify existing toolbars or create your own toolbars. You can also restore the position of the toolbars if you move them around and want to get them back to their default position. This can be very useful if you lose a toolbar and you cannot find it.

New Allows you to create a new toolbar

Rename Allows you to rename a toolbar

Delete Allows you to delete a toolbar that you created

Restore contents Allows you to restore an icon to a toolbar that you created

Restore all contents Allows you to restore a toolbar back to its default if it had previously

had an icon added to it or deleted from it

Restore position Turns all of the default toolbars back on for the workbench that you

are in and restores the default position of those toolbars as well

Add commands Allows you to add icons to an existing toolbar

Remove commands Allows you to remove icons that were added to a toolbar.

Select the Options tab.

Options:

Large Icons Toggles the large icons on or off

Icon Size Ratio Allows you to adjust the size of the icons

Tooltips Allows you to toggle the tooltips on or off

User Interface Language Selects the language that will be displayed

Lock Toolbar Position Allows you to lock the toolbars in place so that they cannot be

moved

Select Close.

Manipulation

The following are actions that can be performed using the mouse when trying to view your parts or sketches.

Three button mouse

Center the display Select and release the middle mouse button on the location

that you want to be centered and it will move to the center of

the display

Pan Select and hold the middle mouse button and you can move

your display around by moving the mouse

Rotate Select and hold the middle mouse button and then select and

hold either the first or third mouse buttons and you can rotate

the display around by moving the mouse. You should see a

rotational ball appear for reference. Both buttons will be held

down simultaneously.

Zoom Select and hold the middle mouse button and then select and

release either the first or third mouse buttons and you can

zoom in or out by moving the mouse up or down. Only the

middle mouse button will be held down.

Rotate and Zoom While on an geometrical entity you can press and hold the

Shift key and then press the middle mouse button to perform a

rotation and zoom using a viewpoint control.

Two button mouse

If you only have a two button mouse to work with then you can do the same things but you will have to use the keyboard in conjunction with the mouse.

Pan While holding down the Alt key, select and hold the right

mouse button

Rotate While holding down the Alt key, select and hold the right

mouse button and then either select and hold the left mouse

button or the Ctrl key.

Zoom While holding down the Ctrl and Alt keys, select and hold the

right mouse button

SpaceBall or SpaceMouse

They can be used to pan, rotate and zoom as long as the correct driver is installed.

|Keyboard | |

|Pan |Press and hold the Ctrl key and select the arrows to pan up, |

| |down, right or left |

|Rotate around the vertical |Press and hold the Shift key and select the left or right arrow |

|Rotate around the horizontal |Press and hold the Shift key and select the up or down arrow |

|Rotate around the normal |Press and hold the Ctrl and Shift keys and select the left or |

| |right arrow |

|Zoom In |Press and hold the Ctrl key and select the Page Up key |

|Zoom Out |Press and hold the Ctrl key and select the Page Down key |

6.2D Sketch Model

AIM: To develop the given model by using CATIA V5 2D commands and to specify its Dimension.

SOFTWARE REQUIRED: - CATIA V5 Database.

COMMANDS IN USE: - ZOOM, LINE, DIMLINEAR.

PROCEDURE: -

In order to obtain given model the following procedure will be followed.

First draw the axis line

Create chamfer for inner side corners.

Command: CHAMFER

Specify first chamfer distance:10 mm

Specify the second chamfer distance:10 mm

Select two corner lines.

Create fillet for outsides corners.

Command: FILLET

Specify fillet radius: 10

Select two corner lines

Command: MIRROR

Select objects

Specify the first point of the mirror line:

Specify the second point of mirror line:

Give enter

Command: DIMENTIONS

By using this command give dimensions linearly for drawn object to indicate it’s

Linear dimensions.

PRECAUTIONS:-

1. Object should be drawn from a specific point of location only.

2. Ensure that proper sequence should be followed to draw an object.

RESULT:

Hence by using CATIA V5 2D commands we have drawn the object model and Dimensions are specified.

7.3D Model of Part Design

AIM: To develop the given model by using CATIA V5 3D commands and to specify its Dimension

[pic]

Draw the sketch of the model.

Start a new file in the Part workbench.

a. The solid model and its dimensions are given for your reference.

b. Draw the outer loop of the sketch using the Rectangle tool and then edit it using the Corner tool.

c. Draw the inner loop of the sketch using the Circle, Elongated Hole, and Cylindrical Elongated Hole tools.

d. Save and close the file.

Starting a New File in the Part Workbench and Invoking the Sketcher Workbench

1. Choose the New button from the Standard toolbar to display the New dialog box.

2. Select the Part option and choose the OK button.

3 Specify the name of the part as in the Enter part name edit box of the New Part dialog box. Select the Enable hybrid design check box, if it is not already selected, and then choose the OK button; a new file in the Part workbench is started.

4. Choose the Sketch button from the Sketcher toolbar and select the yz plane from the geometry area to enter in the sketcher environment.

Drawing the Outer Loop of the Sketch

To draw the outer loop of the sketches, you need to draw a centered rectangle using the Centered Rectangle tool. Next, you need to edit it by filleting its corners using the Corner tool. Before you draw the rectangle, you need to zoom out of the geometry area to make sure you can conveniently draw it.

1. Choose the Zoom Out button from the View toolbar.

2. Choose the Centered Rectangle button from the Predefined Profile toolbar; you are prompted to select a point to create the center of the rectangle.

3. Move the cursor to the origin and specify a point to define the center point of the rectangle when the value of the coordinates is displayed as 0,0 above the cursor. You are prompted to select the second point to create a centered rectangle.

4. Move the cursor to a location whose coordinates are close to 100,100. At this location, the height and width of the rectangle is displayed as 200 and 200, respectively, in both the Height and Width edit boxes, respectively of the Sketch tools toolbar.

5. Specify the point at this location to draw the rectangle, Click anywhere in the geometry area to make sure that the rectangle is no more selected.

[pic]

Next, you need to edit the rectangle by filleting its corners using the Corner tool.

6. Choose the Corner button from the Operation toolbar; you are prompted to select the first curve or a common point.

7. Select the upper right corner of the rectangle, the sketch toolbar expands.

8. Press the TAB key once and enter the value in the Radius edit box as 10 . The selected corner of the rectangle is filleted and the radius value is displayed on the fillet.

9. Similarly, fillet the other corners of the rectangle by following the procedure mentioned above. The vertices to be selected. The final outer loop of the sketch, after filleting all vertices.

Drawing the Inner Loop of the Sketch

The inner loop will be drawn using the Circle, Elongated Hole, and Cylindrical Elongated Hole tools.

1. Choose the Circle button from the Profile toolbar; you are prompted to select a point to define the circle center. Specify the center point of the circle at the origin.

2. Move the cursor horizontally toward the right and specify a point on the circle when the value of the radius is displayed as 20 in the R edit box. The sketch, after drawing the circle Next, you need to draw an elongated hole using the Elongated Hole tool.

3. Choose the Elongated Hole button from the Predefined Profile toolbar; you are prompted to define the center to center distance.

4. Move the cursor to a location whose coordinates are -70, -70 and specify the start point of line defining the center to center distance at this point.

[pic]

5. Move the cursor horizontally toward the right and specify the end point on the location whose coordinates are 70, -70. Next, you are prompted to define a point on the elongated hole.

6. Move the cursor vertically upward and specify a point on the elongated hole when the Radius edit box shows a value of 10 as the radius. shows the sketch after drawing the elongated hole.

7. Choose the Cylindrical Elongated Hole button from the Predefined Profile toolbar; you are prompted to define the center to center arc.

8.Move the cursor to the origin and specify the center point of the reference arc at this location.

9. Enter the start H and V values as 60 and 50 in the Sketch tools toolbar and press ENTER.

10. Move the cursor in the counterclockwise direction to specify the end point of the reference arc at a location whose coordinates are -60, 50.You are prompted to define a point on the cylindrical elongated hole. You need to maintain the radius of the cylindrical elongated hole to 10. Therefore, specify the radius value in the Radius edit box.

11. Press the TAB key, set the value in the Radius edit box to 10 , and press the ENTER key.

Saving and Closing the Sketch

1. Choose the Save button from the Standard toolbar to invoke the Save As dialog box. Create the folder inside the CATIA folder.

2. Enter the name of the file as in the File name edit box and choose the Save button. The file will be saved.

3. Close the part file by choosing File >Close from the menu bar.

8. Assembly of Stuffing Box

AIM:

To develop and assemble the various parts using CATIA V5 3D modeling software.

A. Development of Main Body

i. Start → Mechanical Design → Part Design to activate the Part design workbench.

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ii. Click on the Sketcher → select the XY plane .

iii. Select the Profile → Portray the profile of the main body → Mention the proper dimensions ( ) in such way that the profile drawn should be constrained.

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Fig 3.1. Stuffing Box Main body 2D profile

iv. Exit from the sketcher → Click on the shaft → Specify the proper revolving angle (360°).

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Fig3.2. Main body of stuffing box after performing the revolving operation

v. Select the top surface → Click on the Sketcher → select the circle → Specify the Suitable diameter → Exit from the Sketcher .

vi. Click on the Pocket → Specify the Type as “up to next” →Click “ok” to create desired diameter holes.

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Fig3.3. Main body of stuffing box after performing the pocket operation

vii. Select “XY” plane → Create a dot at the exactly centre of the hole ( which is 42 mm away from the central axis) in the sketcher mode → Exit from the sketcher → Click on the “ Insert” → Select the “Axis System”→ select the dot created already → click “ok”.

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Fig.3.4. Formation of Additional axis system

viii. Select “yx” plane from the axis system created at the centre of the hole→ Click on the sketcher → create a point with a distance of the radius of the hole from the y-axis. (Created point may or may not be on the x-axis) → Click on “Exit workbench”.

ix. Type c: helix in the command line → Select the point and the axis line about which helix has to generate → Specify the pitch and depth → click “ok” to create helix curve.

x. Select the same plane (yx) → click on the sketcher → Draw the square around the dot with a side equal to the half of the pitch of the internal thread → Click on “Exit workbench” → click on the “slot” → Select profile of the thread and the helix curve → Click “ok” to generate square internal threads.

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Fig.3.5. Main body of stuffing box after generating internal threads

B. Gland

i. Start → Mechanical Design → Part Design to activate the Part design workbench.

ii. Click on the Sketcher → select the XY plane .

iii. Select the Profile → Portray the profile of the main body → Mention the proper dimensions ( ) in such way that the profile drawn should be constrained.

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Fig.3.6. 2D profile of gland

iv. Exit from the sketcher → Click on the shaft → Specify the proper revolving angle (360°).

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Fig.3.7 Gland after performing the revolving operation

v. Select the top surface where the holes required to generate → Click on the sketcher → select the circle → provide the dimension in terms of diameter → dimension the centre of the circle from the central axis→ select the mirror option → select the object to mirror → select the axis about which object has to be mirrored.

vi. Exit from the sketcher → Click on the Pocket → Specify the Type as “up to next” →Click “ok” to create desired diameter holes.

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Fig.3.8. Gland

C. Bush

i. Start → Mechanical Design → Part Design to activate the Part design workbench.

ii. Click on the Sketcher → select the XY plane .

iii. Select the Profile → Portray the profile of the main body → Mention the proper dimensions ( ) in such way that the profile drawn should be constrained.

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Fig.3.9. 2D profile of bush

iv. Exit from the sketcher → Click on the shaft → Specify the proper revolving angle (360°).

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Fig.3.10. Bush

D. Stud

i. Start → Mechanical Design → Part Design to activate the Part design workbench.

ii. Click on the Sketcher → select the XY plane .

iii. Select the circle → Specify the diameter of the circle → Exit from the sketcher

→ Select the option “Pad” → specify the amount of pad thickness → click “ok”.

iv. Select the top surface of padded object → click on sketcher → Select the option

“Circle” → Specify the diameter of the circle → Exit from the sketcher

→ Select the option “Pad” → specify the amount of pad thickness → click “ok”.

v. Select “Edge fillet” → Select the surface to fillet → Specify the radius of the fillet → click “ok”.

vi. Select “ZX” plane → Create a dot at a distance of radius of hole from the Z-Axis i and suitable distance from the X-axis in the sketcher mode→ Exit from the sketcher → Type c: helix in the command line → Select the point and the axis line about which helix has to generate → Specify the pitch and depth → click “ok” to create helix curve.

vii. Select the same plane (ZX) → click on the sketcher → Draw the square around the dot with a side equal to the half of the pitch of the external thread → Click on “Exit workbench” → click on the “slot” → Select profile of the thread and the helix curve → Click “ok” to generate square external threads.

viii. Select the surface of other side of padded object ( in step iii) → click on sketcher → Select the option “Circle” → Specify the diameter of the circle → Exit from the sketcher → Select the option “Pad” → specify the amount of pad thickness → click “ok”.

ix. Select “Edge fillet” → Select the surface to fillet → Specify the radius of the fillet → click “ok”.

x. Repeat the procedure mentioned in the steps vi, and vii for generating the external threads.

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Fig.3.10. Sequence of operations for generation of stud

E. Nut

i. Start → Mechanical Design → Part Design to activate the Part design workbench.

ii. Click on the Sketcher → select the XY plane .

iii. Select the hexagon → Specify the side of hexagon → click on “Exit Workbench” → select the pad → specify the pad thickness → click “ok”.

iv. Select the surface where hole has to generate → Click on the sketcher → draw the circle with suitable diameter → click on “Exit workbench” → select the pocket → Select the type as “up to next” → click “ok”

v. Follow the procedure explained in the main body for generating the internal threads.

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Fig.3.11. Hexagonal Nut

F. Assembly

i. Start→ Mechanical Design → Assembly Design.

ii. Select the product1 → Select “Existing components” → select the file to open→ Click “ok”.

iii. Repeat the same for opening all the components of a Stuffing box.

iv. Using Manipulation option move all the components separately from the origin.

v. Using snap and smart move options, place the components at required position.

vi. To differentiate components from one to one change the color (Select the product name → click on the “properties → graphics → color), if it is considered necessary.

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Fig.3.11. Stuffing Box Assemby

RESULT: The given stuffing box assembly is successfully modeled

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9.ASSEMBLY OF KNUCKLE JOINT

Aim:

To create the component of the knuckle joint and to assemble then using to parametric feature based solid modeling software.

System Requirements:

➢ Personal computer

➢ Solid modeling software (CATIA V5).

Description:

❖ A knuckle joint is used to connect two rods which are under the action of tensile loads.

❖ However if the joint is guided, the rods may support a compressive load.

❖ A knuckle joint may be readily disconnected for adjustment or repairs.

❖ It’s use may be found in the link of a cycle chain, tie rod joint for roof truss, valve rod joint with eccentric rod, pump joint, tension link in bridge structure and lever and rod connections of the various types.

❖ In knuckle joint, one end of one of the rods is made into an eye and the end of the other rod is formed into fork with an eye in each of the fork leg.

❖ The knuckle pin passes through both the eye hole and the fork holes and may be secured by means of a small stop pin or plug.

❖ In order to get a better quality of joint the series of the fork and eye are machined, the hole is accurately drilled and pin turned.

❖ The material used for one joint may be steel or wrought iron.

|Command part |Menu operation |

|sketch |Draw toolbar |

|protrusion |Feature toolbar sketch, specify direction thickness |

|Cutout |Feature toolbar sketch- specify direction and thickness |

|hole |Feature toolbar sketch specified direction |

|pattern |Feature toolbar select radius direction of feature |

|round |Feature toolbar select chain specified radius |

|Revolved cutout |Feature toolbar sketch, specify radius and direction |

|Assembly |Menu operation |

|Axial align |Relationship toolbar pick the object surfaces |

|Planar align |Relationship toolbar, pick object and faces |

|mate |Relationship toolbar. pick object surface and insect. |

|angle |Relationship toolbar. specify the angle |

Procedure:

➢ Using sketch protrusion, fillet, cutout, revolve cutout, mirror and pattern command as fork end of the rod is created.

➢ Using sketch protrusion, fillet, cutout, revolve cutout, mirror and pattern command an eye end of the rod is created.

➢ Using sketch protrusion and revolve cutout command a pin is created.

➢ Using sketch protrusion, the revolve cutout command a collar is created.

➢ Using axial align, planar align and angle command take fork end, eye end of the rod are assembled.

➢ Using mate command, pin, taper pin and collar is positioned and assembled it.

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1.Body Use revolve feature

4.Cup Use Revolve feature

2.Nut Use Revolve ,

fillet feature,cut sweep

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6. Screw use Revolve feature.

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3. Screw use Revolve, Thread feature.

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5. Washer use Revolve feature.

7. Tommy bar Tommy bar use Revolve feature.

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Result:Thus the components of knuckle joint are created and assembled successfully.

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Result:

Thus the components of knuckle joint are created and assembled successfully.

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