CONTENTS

SL.NO DATE NAME OF THE EXERCISE PAGE NO REMARKS

CYCLE - 1

1 INTRODUCTION TO CNC MACHINE

& NC CODES

2 CHAMFERING OPERATION

USING CNC MACHINE

3 GROOVING OPERATION

USING CNC MACHINE

4 PLAIN TURNING OPERATION

USING CNC MACHINE

5 FACING OPERATION

USING CNC MACHINE

6 TAPER TURNING OPERATION

USING CNC MACHINE

7 THREADING OPERATION

USING CNC MACHINE

CYCLE – 1I

8 LINEAR INTERPOLATION USING

CNC MILLING MACHINE

9 CIRCULAR INTERPOLATION USING

CNC MILLING MACHINE

10 DRILLING OPERATION USING

CNC MILLING MACHINE

11 PECK DRILLING USING CNC

MILLING MACHINE

12 BORING OPERATION USING CNC

MILLING MACHINE

13

SOLID MODELLING OF

UNIVERSAL COUPLING USING

PRO-E

14 SOLID MODELLING OF

SCREW JACK USING PRO-E

EX.NO: - 2 CHAMFERING OPERATION USING CNC LATHE

MACHINE DATE:-

AIM: -

To programme the Chamfering operation given work piece as per

given drawing using CNC turning centre.

APPARATUS REQUIRED:-

CNC Turning centre

Turning tool

Chuck key

Work piece

Vernier caliper

Compressor

PROCEDURE:-

Power supply and controller on.

Clean and oiling done.

Open CNC door using compressed air.

Work piece is fitted in chuck by using key.

Enter the program is computer in compressor and hence the

Simulation in computer.

Tool offsetting should be done.

Open the door and clean the chips.

Dimension is checked.

RESULT:-

Thus the chamfering operation on the given work piece as per the

given drawing by using CNC lathe machine.

PROGRAM:-

Billet X25 Z75;

G21 G98 G40;

G28 U0 W0;

M06 T01 01;

M03 S1200;

G00 X25 Z1;

G01 X25 Z0 F30;

G90 X25 Z-5 R0 F30;

X25 Z-5 R-1 F30;

X25 Z-5 R-2 F30;

X25 Z-5 R-3 F30;

X25 Z-5 R-4 F30;

X25 Z-5 R-5 F30;

M01;

G28 U0 W0;

M05;

M30;

EX.NO: - 3 GROOVING OPERATION USING CNC LATHE MACHINE DATE:-

AIM: -

To programme the Grooving operation given work piece as per

given drawing using CNC turning centre.

APPARATUS REQUIRED:-

CNC Turning centre

Grooving tool

Chuck key

Work piece

Vernier caliper

Compressor

PROCEDURE:-

Power supply and controller on.

Clean and oiling done.

Open CNC door using compressed air.

Work piece is fitted in chuck by using key.

Enter the program is computer in compressor and hence the

Simulation in computer.

Tool offsetting should be done.

Open the door and clean the chips.

Dimension is checked.

RESULT:-

Thus the Grooving operation on the given work piece as per the

given drawing by using CNC lathe machine.

PROGRAM: -

Billet X25 Z75;

G21 G98;

G28 U0 W0;

M06 T01 01;

M03 S1200;

G00 X25 Z-35;

M01;

G75 R1;

G75 X10 w-5 P1000 Q250 f30;

M01;

G28 U0 W0;

M05;

M30;

EX.NO: - 4 PLAIN TURNING OPERATION USING CNC LATHE

MACHINE DATE:-

AIM: -

To programme the Plain turning operation given work piece as per

given drawing using CNC turning centre.

APPARATUS REQUIRED:-

CNC Turning centre

Turning tool

Chuck key

Work piece

Vernier caliper

Compressor

PROCEDURE:-

Power supply and controller on.

Clean and oiling done.

Open CNC door using compressed air.

Work piece is fitted in chuck by using key.

Enter the program is computer in compressor and hence the

Simulation in computer.

Tool offsetting should be done.

Open the door and clean the chips.

Dimension is checked.

RESULT:-

Thus the Plain turning operation on the given work piece as per the

given drawing by using CNC lathe machine.

PROGRAM: -

Billet X25 Z75;

G21 G98 G40;

G28 U0 W0;

M06 T01 01;

M03 S1200;

G00 X25 Z1;

G90 X25 Z-40 F30;

X24;

X23;

X22;

X21;

X20;

M01;

G28 U0 W0;

M05;

M30;

EX.NO: - 5 FACING OPERATION USING CNC MACHINE

DATE:-

AIM: -

To programme the Facing operation given work piece as per given

drawing using CNC turning centre.

APPARATUS REQUIRED:-

CNC Turning centre

Turning tool

Chuck key

Work piece

Vernier caliper

Compressor

PROCEDURE:-

Power supply and controller on.

Clean and oiling done.

Open CNC door using compressed air.

Work piece is fitted in chuck by using key.

Enter the program is computer in compressor and hence the

Simulation in computer.

Tool offsetting should be done.

Open the door and clean the chips.

Dimension is checked.

RESULT:-

Thus the Facing operation on the given work piece as per the given

drawing by using CNC lathe machine.

PROGRAM: -

Billet X25 Z75;

G21 G98 G40;

G28 U0 W0;

M06 T01 01;

M03 S1200;

G00 X25 Z1;

G94 X0 -0.5 F30;

Z-1;

Z-1.5;

Z-2;

Z-2.5;

Z-3;

M01;

G28 U0 W0;

M05;

M30;

EX.NO: - 6 TAPER TURNING OPERATION USING CNC MACHINE DATE:-

AIM: -

To programme the Taper turning operation given work piece as per

given drawing using CNC turning centre.

APPARATUS REQUIRED:-

CNC Turning centre

Turning tool

Chuck key

Work piece

Vernier caliper

Compressor

PROCEDURE:-

Power supply and controller on.

Clean and oiling done.

Open CNC door using compressed air.

Work piece is fitted in chuck by using key.

Enter the program is computer in compressor and hence the

Simulation in computer.

Tool offsetting should be done.

Open the door and clean the chips.

Dimension is checked.

RESULT:-

Thus the Taper turning operation on the given work piece as per

the given drawing by using CNC lathe machine.

PROGRAM: -

Billet X25 Z75;

G21 G98 G40;

G28 U0 W0;

M06 T01 01;

M03 S1200;

G00 X25 Z1;

G01 X25 Z0 F30;

G90 X25 Z-15 R0 F30;

X25 Z-15 R-1 F30;

X25 Z-15 R-2 F30;

X25 Z-15 R-3 F30;

X25 Z-15 R-4 F30;

X25 Z-15 R-5 F30;

M01;

G28 U0 W0;

M05;

M30;

EX.NO: - 7 THREADING OPERATION USING CNC MACHINE

DATE:-

AIM: -

To programme the Threading operation given work piece as per

given drawing using CNC turning centre.

APPARATUS REQUIRED:-

CNC Turning centre

Turning & Threading tool

Chuck key

Work piece

Vernier caliper

Compressor

PROCEDURE:-

Power supply and controller on.

Clean and oiling done.

Open CNC door using compressed air.

Work piece is fitted in chuck by using key.

Enter the program is computer in compressor and hence the

Simulation in computer.

Tool offsetting should be done.

Open the door and clean the chips.

Dimension is checked.

RESULT:-

Thus the Threading operation on the given work piece as per the

given drawing by using CNC lathe machine.

PROGRAM: -

Billet X25 Z75;

G21 G98 G40;

G28 U0 W0;

M06 T01 01;

M03 S1200;

G00 X25 Z1;

G90 X25 Z-50 F30;

X24.5;

X24;

M01;

G28 U0 W0;

M06 T02 02;

G97;

M03 S1200;

G00 X24 Z1;

G01 X24 Z0;

G76 P041560 Q150 R0.1

G76 X20.32 Z-40 P1840 Q200 F3;

M01;

G28 U0 W0;

M05;

M30;

CYCLE – II

EX.NO: - 8 LINEAR INTERPOLATION USING CNC MILLING

MACHINE DATE:-

AIM: -

To programme Linear interpolation on the given work piece as per

the given drawing by using CNC Milling machine.

APPARATUS REQUIRED:-

CNC Milling machine

End mill cutter ( Dia 4 mm tool)

Allen key

Work piece

Vernier caliper

Compressor

PROCEDURE:-

Prepare the part programme as per the given specification and enter

programme in computer system.

Lubricate the various parts of the CNC machine by using level

provider at the left side.

Open CNC door and fix the given work piece in the chuck by using

Allen key.

Fix the end mill tool in the tool holder.

Close the CNC door using pneumatic air and simulate the prepared

part programme.

Run the CNC programme.

After the completion of programme.

Remove the finished component and the clean the work piece.

RESULT:-

Thus the linear interpolation operation was completed by using

The CNC milling machine.

PROGRAM: -

[BILLET X90 Y90 Z10;

[EDGE MOVE X0 Y0 Z0;

[TOOL DEF T01 D04;

G21

G28 X0 Y0;

M06 T01;

M03 S1200;

G90 G00 X10.Y10;

G00 Z2;

G01 Z-.5;

X80;

Y80;

X10;

Y10;

X80. Y80;

G00 Z2;

G00 X10 Y80;

G01 Z-5;

X80 Y10;

G00 Z2;

G91 G28 Z2;

G28 X0 Y0;

M05;

M30;

EX.NO: - 9 CIRCULAR INTERPOLATION USING CNC MILLING

MACHINE DATE:-

AIM: -

To programme Circular interpolation on the given work piece as

per the given drawing by using CNC Milling machine.

APPARATUS REQUIRED:-

CNC Milling machine

End mill cutter ( Dia 4 mm tool)

Allen key

Work piece

Vernier caliper

Compressor

PROCEDURE:-

Prepare the part programme as per the given specification and enter

programme in computer system.

Lubricate the various parts of the CNC machine by using level

provider at the left side.

Open CNC door and fix the given work piece in the chuck by using

Allen key.

Fix the end mill tool in the tool holder.

Close the CNC door using pneumatic air and simulate the prepared

part programme.

Run the CNC programme.

After the completion of programme.

Remove the finished component and the clean the work piece.

RESULT:-

Thus the Circular interpolation operation was completed by using

the CNC milling machine.

PROGRAM: -

[BILLET X90 Y90 Z10;

[EDGE MOVE X0 Y0 Z0;

[TOOL DEF T01 D04;

G21

G28 X0 Y0;

M06 T01;

M03 S1200;

G90 G00 X10 Y10;

G00 Z2;

G01 Z-0.5;

G02 X80 Y10 R35;

G02 X80 Y80 R35;

G02 X10 Y80 R35;

G02 X10 Y10 R35;

G02 X10 Y80 R100;

G02 X80 Y80 R100;

G02 X80 Y10 R100;

G02 X10 Y10 R100;

G00 Z2;

G91 G28 Z0;

G28 X0 Y0;

M05;

M30;

EX.NO: - 10 DRILLING OPERATION USING CNC MILLING MACHINE DATE:-

AIM: -

To programme drilling operation on the given work piece as per

the given drawing by using CNC Milling machine.

APPARATUS REQUIRED:-

CNC Milling machine

Drill ( Dia 4 mm tool)

Allen key

Work piece

Vernier caliper

Compressor

PROCEDURE:-

Prepare the part programme as per the given specification and enter

programme in computer system.

Lubricate the various parts of the CNC machine by using level

provider at the left side.

Open CNC door and fix the given work piece in the chuck by using

Allen key.

Fix the end mill tool in the tool holder.

Close the CNC door using pneumatic air and simulate the prepared

part programme.

Run the CNC programme.

After the completion of programme.

Remove the finished component and the clean the work piece.

RESULT:-

Thus the drilling operation was completed by using the CNC

milling machine.

PROGRAM: -

[BILLET X 100 Y 50 Z 10;

[EDGEMOVE X0 Y0 Z0;

[TOOLDEF T2 D4 = DRILL;

M06 T01 01;

M03 S1200;

G90 G99 G81 X20 Y20 Z-10 R0 F100;

X40;

X60. Z-10;

X80. Z-10;

G00 Z2;

G91 G28 Z0;

G28 X0. Y0;

M05;

M30;

EX.NO: - 11 PECK DRILLING OPERATION USING CNC MILLING

MACHINE

DATE:-

AIM: -

To programme Peck drilling operation on the given work piece as

per the given drawing by using CNC Milling machine.

APPARATUS REQUIRED:-

CNC Milling machine

Drill ( dia 10 mm tool)

Allen key

Work piece

Vernier caliper

Compressor

PROCEDURE:-

Prepare the part programme as per the given specification and enter

programme in computer system.

Lubricate the various parts of the CNC machine by using level

provider at the left side.

Open CNC door and fix the given work piece in the chuck by using

Allen key.

Fix the end mill tool in the tool holder.

Close the CNC door using pneumatic air and simulate the prepared

part programme.

Run the CNC programme.

After the completion of programme.

Remove the finished component and the clean the work piece.

RESULT:-

Thus the peck drilling operation was completed by using the

CNC milling machine.

PROGRAM: -

[BILLET X100 Y100 Z10;

[TOOLDEF T1 D10;

[EDGEMOVE X0 Y0;

G21 G94 G40 G91;

G28 X0 Y0;

G90;

M06 T1;

M03 S1500;

G00 X20 Y25 Z5;

G99;

G83 X20Y25 Z-5 P1000 Q0.5 R0.5 R0.5 F30 K1;

X50 Y25;

X80 Y25;

X80 Y75;

X50 Y75;

X20 Y75;

G80;

G91;

G00 Z2;

G28 X0 Y0;

M05;

M30;

EX.NO: - 12 BORING OPERATION USING CNC MILLING MACHINE DATE:-

AIM: -

To programme Boring operation on the given work piece as per the

given drawing by using CNC Milling machine.

APPARATUS REQUIRED:-

CNC Milling machine

Drill- dia 5mm, boring – dia 8mm tool

Allen key

Work piece

Vernier caliper

Compressor

PROCEDURE:-

Prepare the part programme as per the given specification and enter

programme in computer system.

Lubricate the various parts of the CNC machine by using level

provider at the left side.

Open CNC door and fix the given work piece in the chuck by using

Allen key.

Fix the end mill tool in the tool holder.

Close the CNC door using pneumatic air and simulate the prepared

part programme.

Run the CNC programme.

After the completion of programme.

Remove the finished component and the clean the work piece.

RESULT:-

Thus the Boring operation was completed by using the CNC

milling machine.

PROGRAM: -

[BILLET X100 Y100 Z10;

[TOOLDEF T1 D5 = DRILL

[TOOLDEF T2 D8 = BORING

[EDGEMOVE X0 Y0;

G21 G94 G40 G91;

G28 X0 Y0;

G90;

M06 T1;

M03 S1500;

G00 X20 Y25. Z5;

G99;

G83 X20 Y25 Z-5 P1000 Q0.5 R1. F30. K1;

X80 Y25;

X80 Y75;

X20 Y75;

X50 Y50;

G80;

G91;

G28 X0 Y0;

G90;

M06 T2;

G00 X20 Y25 Z5;

G99;

G86 X20 Y25 Z-3 P100 Q0.5 R0.5 F30. K1;

X80 Y25;

X80 Y75;

X20 Y75;

X50 Y50;

G91;

G28 X0 Y0;

M05;

M30;

EX.NO: - 13 SOLID MODELLING OF UNIVERSAL COUPLING USING

PRO-E

DATE:-

AIM:

To draw the given solid model using pro-e software.

SOFTWARE REQUIRED:

Windows XP

Pro – E wildfire – 2.0

HARDWARE REQUIRED:

1 GB RAM

160 GB HARDDISK

PROCESSOR INTEL DUALCORE 2.5 GHZ.

PROCEDURE:

Procedure to create solid model using commands like extrude, revolve,

blend, sweep, etc.,

The 3D model is modified according to the requirements using the

following commands cut, hole, fillet, chamfer, rib, etc.,

Thus 3D model is completed using pro-e with dimensions.

RESULT:

Thus the 3D model is completed using Pro-E wildfire software.

-----------------------------

UNIVERSAL COUPLING

EX.NO: - 14 SOLID MODELLING OF SCREW JACK USING PRO-E

DATE:-

AIM:

To draw the given solid model using pro-e software.

SOFTWARE REQUIRED:

Windows XP

Pro – E wildfire – 2.0

HARDWARE REQUIRED:

1 GB RAM

160 GB HARDDISK

PROCESSOR INTEL DUALCORE 2.5 GHZ.

PROCEDURE:

Procedure to create solid model using commands like extrude, revolve,

blend, sweep, etc.,

The 3D model is modified according to the requirements using the

following commands cut, hole, fillet, chamfer, rib, etc.,

Thus 3D model is completed using pro-e with dimensions.

RESULT:

Thus the 3D model is completed using Pro-E wildfire software.

-----------------------------

SCREW JACK

V.S.B. ENGINEERING COLLEGE

KARUR – 639111.

DEPARTMENT OF

MECHANICAL ENGINEERING

COMPUTER AIDED MANUFACTURING

LABORATORY MANUAL

PREPARED BY

MR. R. DHILEEPAN KUMARASAMY, M.E,

T. PONNUSAMY, M.E,

G.SUBRAMANI, AMIE,

LAB – INCHARGE

MR. M.UMASHANKARAN, M.E, (HEAD OF THE DEPT)

EX.NO:- 1 INTRODUCTION TO NC/CNC SYSTEM DATE:

INTRODUCTION:

The part programmed are written on a software using high

level language since computer has enhanced memory capacity the NC machine

operations are controlled by the computer. The NC system controlled by

computer are known as “computer numerical control” (CNC) here punched

tapes are replaced by floppy or ROM disc.

ADVANTAGES:-

Greater flexibility in manufacturing.

Improved quality control.

Accuracy is more.

The part programs can be easily edited.

Repeated operations can be stored as a sub-routine.

Advanced programming like mirroring, sub-routine etc.

Ability to store tool offset and tool compensation.

Production time is less.

Highly skilled and experienced operates is not necessary.

FUNCTION:-

To control the machine tool.

To do in process compensation.

To improve the programming & operating features.

To diagnose the machine tool.

CNC PART PROGRAMME – G CODES & M CODES

Part programme consist of numbers at blocks. Block consists of numbers

words. Word consists of numbers & alphabets.

ALPHABETS: - MEANING

A Rotation about x – axis

B Rotation about y – axis

C Rotation about z – axis

D&E Rotation about additional axis

F Feed function

G Preparatory function

I Interpolation parameter

J Thread pitch parallel to y – axis

K Thread pitch parallel to z – axis

M Miscellaneous function

N Block numbers

O Assign program number

P, Q, R Thread movement parallel to x, y, z axis

S Spindle speed function

T Tool function

U, V, W Second movement parallel to x, y, z axis

X Movement in X axis

Y Movement in Y axis

Z Movement in Z axis

G – CODES (PREPARATORY FUNCTIONS) FOR TURNNING

G – CODES FUNCTION

G00 - Rapid Traverse

G01 - Linear Interpolation (Feed)

G02 - Circular Interpolation (Clockwise)

G03 - Circular Interpolation (Counter Clockwise)

G04 - Dwell

G20 - Inch data input

G21 - Metric data input (mm)

G28 - Reference point return

G32 - Thread cutting

G40 - Tool nose radius compensation cancel

G41 - Tool nose radius compensation – left

G42 - Tool nose radius compensation – Right

G50 - Maximum spindle speed setting

G70 - Finishing cycle

G71 - Stock removal in turning (Multiple turning)

G72 - Stock removal in facing (Multiple facing)

G73 - Pattern repeating

G74 - Peck drilling in Z – axis

G75 - Multiple Grooving in X – axis

G76 - Multiple Thread cutting cycle

G90 - Turning cycle

G92 - Thread cutting cycle

G94 - Facing cycle

G96 - Constant surface speed control

G97 - Constant surface speed control cancel

G98 - Feed per minute

G99 - Feed per revolution

M – CODES (MISCELLANEOUS FUNCTIONS) FOR TURNING

M – CODES FUNCTION

M00 - Program stop

M01 - Optional stop

M02 - Program End

M03 - Spindle rotation (CW)

M04 - Spindle rotation (CW)

M05 - Spindle stop

M06 - Tool change

M08 - Coolant ON

M09 - Coolant OFF

M10 - Vice open

M11 - Vice close

M98 - Sub program call

M99 - Sub program exit

M30 - Program stop and Rewind

G – CODES (PREPARATORY FUNCTIONS) FOR MILLING

G – CODES FUNCTION

G00 - Rapid Traverse

G01 - Linear Interpolation (Feed)

G02 - Circular Interpolation (Clockwise)

G03 - Circular Interpolation (Counter Clockwise)

G04 - Dwell

G17 - XY plane selection

G18 - XY plane selection

G19 - YZ plane selection

G20 - Inch data input

G21 - Metric data input (mm)

G40 - Tool nose radius compensation cancel

G41 - Tool nose radius compensation – left

G42 - Tool nose radius compensation – Right

G74 - Counter tapping cycle

G76 - Fine Boring

G80 - Canned cycle cancel

G83 - Peck drilling cycle

G86 - Counter boring cycle

G89 - Boring cycle

G90 - Absolute method

G91 - Incremental method

G94 - Feed per Minute

G95 - Feed per revolution

G98 - Return to initial point in canned cycle

G99 - Return to R – point in canned cycle

M – CODES (MISCELLANEOUS FUNCTIONS) FOR MILLING

M – CODES FUNCTION

M00 - Program stop

M01 - Optional stop

M02 - Program End

M03 - Spindle rotation (CW)

M04 - Spindle rotation (CW)

M05 - Spindle stop

M06 - Tool change

M08 - Coolant ON

M09 - Coolant OFF

M10 - Vice open

M11 - Vice close

M98 - Sub program call

M99 - Sub program exit

M30 - Program stop and Rewind

M71 - X - Mirror ON

M71 - Y - Mirror ON

M80 - X – Mirror off

M81 - Y – Mirror off

M98 - Sub program call

M99 - Sub program exit

SYLLABUS