PR6412 COMPUTER AIDED MACHINE DRAWING LAB MANUAL

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PR 6412 COMPUTER AIDED MACHINE DRAWING

LABORATORY

REGULATION 2013

LAB MANUAL

DEPARTMENT OF AUTOMOBILE ENGINEERING

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PR6412 COMPUTER AIDED MACHINE DRAWING LABORATORY L T P C

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OBJECTIVES:

• To introduce the students the Indian standard code of practice for engineering drawing and general symbols and abbreviation used on the drawing.

• To provide hands on experience to develop 2D and 3D models of engineering components.

LIST OF EXPERIMENTS

1. Drawing of automobile components such as piston, connecting rod, valves, manifold and crank shaft.

2. Assembly drawing of screw jack, piston – connecting rod assembly, valve assembly, clutch assembly and gear box assembly

.

OUTCOMES

• Ability to develop engineering drawing for the industrial component using Indian Standard code of practice.

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INDEX

S.No Date Name of the Experiment Mark Signature

1 CODE OF PRACTICE FOR ENGINEERING

DRAWING

2 STUDY OF WELDING SYMBOLS

3 STUDY OF RIVETED JOINTS

4 STUDY OF SCREW THREADS, KEYS AND

FASTENERS

5 STUDY OF DRAFTING SOFTWARE

(AUTOCAD)

6 BASIC 2D DRAWING – Auto CAD

7 SLEEVE AND COTTER JOINT

8 SIMPLE ECCENTRIC

9 SCREW JACK

10 CONNECTING ROD

11 PISTON

12 SINGLE PLATE CLUTCH

13 MULTI PLATE CLUTCH

14 AUTOMOBILE GEAR BOX

15 AIR VALUE

16 STUFFING BOX

17 CRANK SHAFT

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EXP NO: 01 CODE OF PRACTICE FOR ENGINEERING DRAWING DATE:

AIM:

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RESULT:

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EX.NO:2 STUDY OF WELDING SYMBOLS DATE:

AIM:

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EX.NO:3 STUDY OF RIVETED JOINTS DATE:

AIM:

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EX.NO:4 STUDY OF SCREW THREADS, KEYS AND FASTENERS DATE:

AIM:

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EX.NO:5 STUDY OF DRAFTING SOFTWARE (AUTOCAD) DATE:

AIM:

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EX.NO:6 BASIC 2D DRAWING – Auto CAD DATE:

AIM:

1. To understand drawing standards

2. Draw basic sketches and constraint them using Geometrical and Dimensional constraints

PROCEDURE:

1. Open Auto CAD; Draw the Shape given in the Fig.1.

2. Add relations and Smart dimensions and make sure that the Sketch is Fully constraint

3. Change the dimensions according to Fig.1 4. Repeat the same for Fig.2 to Fig.6

Commands used:

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The basic sketches were drawn using AUTOCAD as shown in Figures and the required parameters were added to modify the dimensions at later stage if necessary.

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EX.NO:7 ASSEMBLY OF SLEEVE AND COTTER JOINT DATE:

AIM:

1. To create 3D models of Sleeve and Cotter Joint parts using Auto CAD. 2. To Create the Assembly of Sleeve and Cotter Joint using Auto CAD. 3. To understand the type of fits and tolerances used in Assembly.

PROCEDURE:

1. The modeling concepts – Solid modeling, Surface modeling were trailed in Auto CAD/CATIA by creating 3D model of Sleeve and cotter Joint-connecting rod, sleeve, cotter.

2. The options available in each Feature command are tried to understand the capabilities of each command.

3. Design Methods: Bottom-up Design, Top down Design are discussed.

4. Assembly of Sleeve and Cotter Joint was created using Bottom-up design approach.

COMMANDS USED:

Sketcher Commands: Line, Circle, Arc, Fillet, Trim, Smart Dimension, Relations, Show, and View

Features Commands: Extrude (pad) and Cut, Revolve (shaft), Sweep, and Loft, Fillet/Round, Chamfer, and Draft, Hole - Simple and Hole Wizard, Hole Series, Scale, Shell, Rib, Dome, Freeform, Shape, Deform, Indent,

Flex, Pattern and Mirror, Curves, Fastening Features

Assembly Commands: Insert, Component, Existing Part/Assembly

Mating Commands: Angle, Coincident, Concentric, Distance, Parallel, Perpendicular, Tangent

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RESULT:

The 2D models of Sleeve and Cotter Joint parts are created using Auto CAD/CATIA. The type of fits and tolerances used in Assembly are studied.

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EX.NO:8 ASSEMBLY OF SIMPLE ECCENTRIC DATE:

AIM:

1. To create 3D models of SIMPLE ECCENTRIC parts using Auto CAD. 2. To Create the Assembly of Simple Eccentric using Auto CAD.

3. To understand the type of fits and tolerances used in Assembly.

PROCEDURE:

1. The drawings of Simple Eccentric parts (straps, sheave, shim, cheese headed bolt, M12 nut, M12 lock nut) are studied.

2. 3D models of all the parts are created using Auto CAD.

3. The Assembly of Simple Eccentric was created as per the drawing specification.

COMMANDS USED:

Sketcher Commands: Line, Circle, Arc, Fillet, Trim, Smart Dimension, Relations, Show, and View.

Features Commands: Extrude (pad) and Cut, Revolve (shaft), Fillet/Round, Chamfer, Hole - Simple, Pattern,

Fastening Features.

Assembly Commands: Insert, Component, Existing Part/Assembly. Mating Commands: Coincident, Concentric, Distance.

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RESULT:

The 2D models of Simple Eccentric parts (straps, sheave, shim, cheese headed bolt, M12 nut, M12 lock nut) are created using Auto CAD/CATIA. The type of fits and tolerances used in Assembly are studied.

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EX.NO:9 ASSEMBLY OF SCREW JACK DATE:

AIM:

1. To create 2D models of SCREW JACK parts using Auto CAD. 2. To Create the Assembly of Screw Jack using Auto CAD.

PROCEDURE:

1. The drawings of Body, Nut, Screw Spindle, Cup, Washer Special, CSK Screw, and Tommy Bar are studied.

2. 3D models of Body, Nut, Screw Spindle, Cup, Washer Special, CSK Screw, and Tommy Bar are created using Auto CAD.

3. The Assembly of Screw Jack was created as per the drawing specification.

COMMANDS USED:

Sketcher Commands: Line, Circle, Arc, Fillet, Trim, Smart Dimension, Relations, Show,and View

Fastening Features

Assembly Commands: Insert, Component, Existing Part/Assembly Mating Commands: Coincident, Concentric, Distance

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The 2D models of Screw Jack parts (Casting, Nut, Cup, Tommy bar, Setscrew, Screw, washer) are created using Auto CAD.

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EX.NO:10 ASSEMBLY OF CONNECTING ROD DATE:

AIM:

1. To create 2D models of Connecting Rod parts using Auto CAD. 2. To Create the Assembly of Connecting Rod using Auto CAD. 3. To understand the type of fits and tolerances used in Assembly.

PROCEDURE:

1. The drawings of Connecting Rod, Bush, Stud, Pin, Bearing Brasses, Distance Piece, Cover, Washer, Nut, and Split pin are studied.

3. The Assembly of Connecting Rod was created as per the drawing specification.

COMMANDS USED:

Fastening Features.

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RESULT:

The 2D models of Connecting Rod parts (Connecting Rod, Bush, Stud, Pin, Bearing Brasses, Distance Piece, Cover, Washer, Nut, and Split pin) are created using Auto CAD. The type of fits and tolerances used in Assembly are studied.

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EX.NO:11 ASSEMBLY OF PISTON DATE:

AIM:

1. To create 2D models of Piston parts using Auto CAD. 2. To Create the Assembly of Piston using Auto CAD.

PROCEDURE:

1. The drawings of Piston, Piston Pin,skirt and crown are studied. 2. 2D models of all the parts are created using Auto CAD.

3. The Assembly of piston was created as per the drawing specification.

COMMANDS USED:

Fastening Features.

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RESULT:

The 2D models of piston parts are created using Auto CAD. The type of fits and tolerances used in Assembly are studied.

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EX.NO:12 ASSEMBLY OF SINGLE PLATE CLUTCH DATE:

AIM:

1. To create 2D models of Single plate clutch using Auto CAD. 2. To Create the Assembly of Single plate clutch using Auto CAD. 3. To understand the type of fits and tolerances used in Assembly.

PROCEDURE:

1. The drawings of Single plate clutch are studied.

3. The Assembly of Single plate clutch was created as per the drawing specification.

COMMANDS USED:

Fastening Features.

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RESULT:

The 2D models of single plate clutch are created using Auto CAD. The type of fits and tolerances used in Assembly are studied.

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EX.NO:13 ASSEMBLY OF MULTI PLATE CLUTCH DATE:

AIM:

1. To create 2D models of Multi plate clutch using Auto CAD. 2. To Create the Assembly of Multi plate clutch using Auto CAD. 3. To understand the type of fits and tolerances used in Assembly.

PROCEDURE:

1. The drawings of Multi plate clutch are studied.

3. The Assembly of Multi plate clutch was created as per the drawing specification.

COMMANDS USED:

Fastening Features.

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RESULT:

The 2D models of multi plate clutch are created using Auto CAD. The type of fits and tolerances used in Assembly are studied.

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EX.NO:14 ASSEMBLY OF AUTOMOBILE GEAR BOX DATE:

AIM:

1. To create 2D models of Automobile Gear Box using Auto CAD. 2. To Create the Assembly of Automobile Gear Box using Auto CAD. 3. To understand the type of fits and tolerances used in Assembly.

PROCEDURE:

1. The drawings of Automobile Gear Box are studied. 2. 2D models of all the parts are created using Auto CAD.

3. The Assembly of Automobile Gear Box was created as per the drawing specification.

COMMANDS USED:

Fastening Features.

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RESULT:

The 2D models of Automobile Gear Box are created using Auto CAD. The type of fits and tolerances used in Assembly are studied.

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EX.NO:15 ASSEMBLY OF AIR VALUE DATE:

AIM:

1. To create 2D models of Air value using Auto CAD. 2. To Create the Assembly of Air value using Auto CAD.

PROCEDURE:

1. The drawings of Air value are studied.

3. The Assembly of Air value was created as per the drawing specification.

COMMANDS USED:

Fastening Features.

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RESULT:

The 2D models of Air value are created using Auto CAD. The type of fits and tolerances used in Assembly are studied.

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EX.NO:15 ASSEMBLY OF STUFFING BOX DATE:

AIM:

1. To create 2D models of stuffing box using Auto CAD. 2. To Create the Assembly of stuffing box using Auto CAD.

PROCEDURE:

1. The drawings of stuffing box are studied.

3. The Assembly of stuffing box was created as per the drawing specification.

COMMANDS USED:

Fastening Features.

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RESULT:

The 2D models of Stuffing box are created using Auto CAD. The type of fits and tolerances used in Assembly are studied.

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EX.NO:16 ASSEMBLY OF CRANK SHAFT DATE:

AIM:

1. To create 2D models of crank shaft using Auto CAD. 2. To Create the Assembly of crank shaft using Auto CAD.

PROCEDURE:

1. The drawings of crank shaft are studied.

3. The Assembly of crank shaft was created as per the drawing specification.

COMMANDS USED:

Fastening Features.

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RESULT:

The 2D models of crank shaft are created using Auto CAD. The type of fits and tolerances used in Assembly are studied.

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