DHANALAKSHMI COLLEGE OF ENGINEERING - …dcemecha.weebly.com/uploads/5/8/0/3/58036683/cad_cam_-_22.12.15-1.pdfDHANALAKSHMI COLLEGE OF ENGINEERING DR ... • To gain practical experience

DHANALAKSHMI COLLEGE OF ENGINEERING DR. VPR NAGAR, MANIMANGALAM,

CHENNAI- 601301

DEPARTMENT OF MECHANICAL ENGINEERING

ME6611- CAD/CAM LABORATORY

STUDENT NAME : _______________________________

REGISTER NUMBER : _______________________________

YEAR / SEM / SEC : _______________________________

DEPARTMENT : _______________________________

REGULATION : _______________________________

LAB MANUAL / OBSERVATION

ME6611- CAD / CAM LABORATORY 2


ME6611- CAD / CAM LABORATORY OBJECTIVES:

• To gain practical experience in handling 2D drafting and 3D modelling software systems.

• To study the features of CNC Machine Tool.

• To expose students to modern control systems (Fanuc, Siemens etc.)

• To know the application of various CNC machines like CNC lathe, CNC Vertical

Machining centre, CNC EDM and CNC wire-cut and studying of Rapid prototyping.

LIST OF EXPERIMENTS:

1. 3D GEOMETRIC MODELLING

List of Experiments

1. Introduction of 3D Modelling software

Creation of 3D assembly model of following machine elements using 3D Modelling

software

2. Flange Coupling

3. Plummer Block

4. Screw Jack

5. Lathe Tailstock

6. Universal Joint

7. Machine Vice

8. Stuffing box

9. Crosshead

10. Safety Valves

11. Non-return valves

12. Connecting rod

13. Piston

14. Crankshaft 24 PERIODS

* Students may also be trained in manual drawing of some of the above components

2. MANUAL PART PROGRAMMING

(i) Part Programming - CNC Machining Centre

a) Linear Cutting.

b) Circular cutting.

c) Cutter Radius Compensation.

d) Canned Cycle Operations.

(ii) Part Programming - CNC Turning Centre

a) Straight, Taper and Radius Turning.

b) Thread Cutting.

c) Rough and Finish Turning Cycle.

d) Drilling and Tapping Cycle. 21 PERIODS

3. COMPUTER AIDED PART PROGRAMMING

e) CL Data and Post process generation using CAM packages.

f) Application of CAPP in Machining and Turning Centre.

TOTAL: 45 PERIODS


OUTCOMES:

modelling software.

LIST OF EQUIPMENT FOR A BATCH OF 30 STUDENTS

S.No. DESCRIPTION OF THE EQUIPMENT Quantity

HARDWARE

1 Computer Server 1

2 Computer nodes or systems (High end CPU with atleast 1 GB

main memory) networked to the server

30

3 A3 size plotter 1

4 Laser Printer 1

5 CNC Lathe 1

6 CNC milling machine 1

SOFTWARE

7 Any High end integrated modelling and manufacturing CAD /

CAM software

15 licenses

8 CAM Software for machining centre and turning centre (CNC

Programming and tool path simulation for FANUC / Sinumeric

and Heidenhain controller)

15 licenses

9 Licensed operating system Adequate

10 Support for CAPP Adequate


Sl.

No.

Date

Exp.

No.

Name of the Experiments

Marks

Sign.

3D GEOMETRIC MODELING (CAD)

1 Introduction to modeling software Pro-E

2 1 3D Part Modeling - 1



5 4 3D Assembly of Flange Coupling

6 5 3D Assembly of Plummer Block

7 6 3D Assembly of Screw Jack

8 7 3D Assembly of Lathe Tailstock

9 8 3D Assembly of Universal Joint

10 9 3D Assembly of Machine Vice

11 10 3D Assembly of Stuffing box

12 11 3D Assembly of Crosshead

13 12 3D Assembly of Connecting rod

14 13 3D Assembly of Piston

15 14 3D Assembly of Crankshaft

16 15 3D Assembly of Safety Valves (Practice)

17 16 3D Assembly of Non-return valves (Practice)

COMPUTER AIDED PART

PROGRAMMING (CAM)

18 Study of CNC Machine and Part Programming

1. TURNING EXERCISES

19 17 Step Turning

20 18 External Multiple Turning

21 19 Grooving and Threading Operations

22 20 Drilling and Boring Operations

23 21 Internal Multiple Turning

2. MILLING EXERCISES

24 22 Contour Milling

25 23 Drilling

26 24 Mirroring

27 25 Circular Pocketing

Lab Incharge HoD/Mech

INDEX

NAME: _______________________ REG. No.:______________________



INTRODUCTION TO MODELLING

SOFTWARE PRO-E

Introduction:

Pro-E is a high end cad package. Pro-E is a parametric solid model. It was

developed by parametric technology corporation. It is suite of programs that are used

in design analysis and manufacturing of a virtually unlimited range of products.

Feature based:

Pro-E is a feature based solid modeling tool. It builds the model using

individual building blocks one at a time. Designers can think at a high level and

leave all the low level geometry details, for Pro-E to figure out.

Associative:

We can use Pro-E to document model by creating parts, assemblies and

drawing all these functions are really associative.

Parametric:

Parametric means that the physical shape of the part is driven by the values

assigned to the attributes of its features.

Solid modeling:

Solid modeling means that the computer model we create is able to contain all

the information that a real solid object would have the material.

Parent - child Relationship:

An important aspect to feature based modeling in Pro-E is the concept of

modeling in pro-E parent - child relationship.

Datum plane:

A datum plane representation of an infinite large power surface area of a user

defined orientation and location that are continuously adjusted automatically to be

slightly larger than the object.


Plane-Insert-Datum-Plane:

Default method creates three mutually perpendicular datum planes

intersecting at the origin at the default coordinate system. These three planes

represents XY, YZ & ZX planes are named as follows:

DTM1 → represents YZ plane

DTM2 → represents ZX plane

DTM3 → represents XY plane

Datum axis:

It can be used as a reference for features creation. It is particularly useful for

making datum planes placing items concentrically and creating radial patterns.

Part modeling:

Pro-E is a feature based modeling software. Features in Pro-E are of two

kinds. Place features extrude, revolve, sweep and blend are examples of sketched

features.

Sketches features:

Protrusion features:

Protrusion is the method of adding a solid material of the method. Pro-E

provides the following basic methods of adding material to a method.

Extrude: creates a solid feature by extruding a section named to the section.

Revolve: creates a solid surface by revolving a section about an axis.

Sweep: creates a solid feature by sweeping a section about a path.

Blend: creates a solid feature by blending various cross sections at various levels.

Extrusion:

Features → create → solid → protrusion → extrude

Attribute types:

One side: Adds the material in one side of the cross section only.

Both sides: Adds the material on both sides of the cross section.

Defining sketching plane:

We have to specify the sketch plane to draw the cross section.


Direction of feature creation:

Once the direction of extrusion is defined Pro-E will promote for orienting the

sketch plane. Orientation plane can lie horizontally or vertically in the section view

sketch plane once the orientation plane is defined, tools needed for sketching the

cross section will be provided by Pro-E.

Sketch reference:

Pro-E automatically selects two mutually perpendicular lines which are

normal to the sketching plane as horizontal and vertical reference for dimensioning

and constraining the sketch.

Extrusion depth:

Blind: Enter a dimension for the feature depth. We can then control the feature

depth by changing the depth dimension

Through next: Terminate the features at the next part surface

Through all: The new surface intersects all surface

Rib:

Feature → create → solid → rib

A rib is a special type of protrusion designed to create a thin wall or web to

support two surface.

All straight holes are created with constant diameter. A hole from feature always

removes material from our model.

Round:

Features → create → solid → round

It creates smooth transition with circular or profile between adjacent surface.

An edge round smoothness the hard edges between adjacent surface.

Sweep:

Feature → create → solid → protrusion → sweep

A sweep is create by defining two sections. The section is the trajectory and

the second cross section. Sweep can be used on for protrusion cut and slots.


Blend:

Feature → create → solid → protrusion → blend

Blending is the method of defining a volume by connecting series of at least

two planner sections together, at their edges with transitional surface.

Assembly creation:

Assembly mode in Pro-E enable us to place component parts and use

assemblies together to form assemblies as well as to design parts based on how they

should fit together.

Mate:

Selected surface point in opposite direction and become coplanar.

Mate offset:

Selected surface point in opposite direction and are offset by specific value.

Align:

Selected surface point in opposite direction and become coplanar axis may be

co-axial with the align command.

Align offset:

Selected surface point in opposite direction and are offset by a specific value

which is to be modified to provide design flexibility.

Orient:

Make the two surface of revolution co-axial.


3D PART MODELING


Ex. No: 01 3D PART MODELING - 1

DATE:


Aim:

To create a 3D part model by using standard CAD software Pro-E.

Hardware required:

250 GB hard disc,8 GB ram, core 2 quad processor, NVIDA graphic card, monitor,

mouse and key board.

Software required:

Pro-E Wildfire 4.0

Commands used:

Part diagram:

Extrude → Sketch → Sketch to dimension → Ok

Hole → Sketch → Given dimension → Ok

Revolve → Sketch plane → Sketches → Centerlines → Sketch to dimension → Ok

Result:

Thus the given 3D part model was created by using standard CAD software Pro-E.


DATE:



DATE:


Aim:


Hardware required:



Software required:

Pro-E Wildfire 4.0

Commands used:

Part diagram:




Result:



DATE:


0. Adjust the coolant nozzle on the cutting edges and start the coolant pump.


DATE:


Aim:


Hardware required:



Software required:

Pro-E Wildfire 4.0

Commands used:

Part diagram:




Result:



DATE:



ASSEMBLY DRAWINGS


Ex. No: 04 3D ASSEMBLY DRAWING OF FLANGE COUPLING

DATE:


Aim:

To create various parts of flange coupling and assemble them by using standard

CAD software Pro-E.

Hardware required:



Software required:

Pro-E Wildfire 4.0

Description of the component:

A coupling is a device used to connect two shafts together at their ends for the

purpose of transmitting power permitting some degree of misalignment or end movement

or both.

Assembly:

The shaft end is fitted to both male and female flange. Now both the male and

female flange are joined together with help of the nut and bolt.

Commands used:

Part diagram:




Assembly:

Assembly → Set default → Assembly according to alignment → Fully constrained

→ Ok


DATE:



DATE:


Result:

Thus the given various part of flange coupling had been created and assembled by

using standard CAD software Pro-E.


DATE:


Ex. No: 05 3D ASSEMBLY DRAWING OF PLUMMER BLOCK

DATE:


Aim:

To create various parts of Plummer block and assemble them by using standard

CAD software Pro-E.

Hardware required:



Software required:

Pro-E Wildfire 4.0


A Plummer block is known as pillow block or bearing housing, is a pedestal used to

provide support for a rotating shaft with the help of compatible bearings.

Assembly:

The brass part is mounted over the block. The block is covered along with brass part

with help of a cover nut and lock nut.

Commands used:

Part diagram:




Assembly:


→ Ok


DATE:



DATE:


Result:

Thus the given various part of Plummer block had been created and assembled by



DATE:


Ex. No: 06 3D ASSEMBLY OF SCREW JACK

DATE:


Aim:

To create various parts of screw jack and assemble them by using standard CAD

software Pro-E.

Hardware required:



Software required:

Pro-E Wildfire 4.0


A screw jack is used to raise heavy loads through a small vertical distance. In

automobile industries, it is used to raise the vehicles for repair works. The nut is a separate

piece press fitted into the hole of the body.

Assembly:

The cut is fitted on the top of the screw spindle. The nut arrangement is kept in

between the screw spindle and the body.

Commands used:

Part diagram:




Assembly:


→ Ok


DATE:



DATE:


Result:

Thus the given various part of screw jack had been created and assembled by using

standard CAD software Pro-E.


DATE:


Ex. No: 07 3D ASSEMBLY OF LATHE TAIL STOCK

DATE:


Aim:

To create various parts of lathe tail stock and assemble them by using standard CAD

software Pro-E.

Hardware required:



Software required:

Pro-E Wildfire 4.0


Tail stock is a part of lathe. It is mounted on the bed ways opposite to the head

stock. It can be moved on the bed and clamped at any desired place on the bed. It is used to

support the long work and sometimes tools like drill, reamer, etc.

Assembly:

This body of the tail stock has a hollow cylinder at the top and four rectangular

blocks the bottom. The bore of the cylinder is to receive the barrel. Taper hole at the front

end of the barrel is to receive the centre. The remaining hole portion of the barrel has

threads. The barrel has a long key way to accommodate the feather key.

Commands used:

Part diagram:




Assembly:


→ Ok


DATE:



DATE:


Result:

Thus the given various part of lathe tail stock had been created and assembled by



DATE:


Ex. No: 08 3D ASSEMBLY OF UNIVERSAL COUPLING

DATE:


Aim:

To create various parts of universal coupling and assemble them by using standard

CAD software Pro-E.

Hardware required:



Software required:

Pro-E Wildfire 4.0


Universal coupling is used to connect two shafts having intersecting axes. The angle

between the two shafts is less than 30˚. It consists of two forks, centre blocks, pins.

Assembly:

The centre block is inserted into one of the forks. A collar is assembled on the other

ends of the pin and locked by means of a cotter, the centre block such that the two fork

ends are at right angles to each other.

Commands used:

Part diagram:



Revolve → Sketch plane → Sketches → Centerline → Sketch to dimension → Ok

Assembly:


→ Ok


DATE:



DATE:


Result:

Thus the given various part of universal coupling had been created and assembled

by using standard CAD software Pro-E.


DATE:


Ex. No: 09 3D ASSEMBLY OF MACHINE VICE

DATE:


Aim:

To create various parts of machine vice and assemble them by using standard CAD

software Pro-E.

Hardware required:



Software required:

Pro-E Wildfire 4.0


Machine vice is a work holding device. It is used to machine shape. The machine

vice consists of a brass, a block, fixed jaw, screw, spindle and plate, set screws, etc.

Assembly:

The block is screwed to the base at one end. At another end the fixed end jaw is

screwed. The spindle is then screwed through the block and sliding.

Commands used:

Part diagram:




Assembly:


→ Ok


DATE:



DATE:


Result:

Thus the given various part of machine vice had been created and assembled by



DATE:


Ex. No: 10 3D ASSEMBLY OF STUFFING BOX

DATE:


Aim:

To create various parts of stuffing box and assemble them by using standard CAD

software Pro-E.

Hardware required:



Software required:

Pro-E Wildfire 4.0


A stuffing box is an assembly which is used to house a gland seal between sliding or

turning parts of machine elements.

Assembly:

The gland bush is inserted into the body. The studs are placed on both the holes on

either sides of the body. The piston rod is inserted into the hole of the assembly.

Commands used:

Part diagram:




Assembly:


→ Ok

Result:

Thus the given various part of stuffing box had been created and assembled by using


Ex. No: 10 3D ASSEMBLY OF STUFFING BOX

DATE:


Ex. No: 11 3D ASSEMBLY OF CROSS HEAD

DATE:


Aim:

To create various parts of cross head and assemble them by using standard CAD

software Pro-E.

Hardware required:



Software required:

Pro-E Wildfire 4.0


A crosshead is a mechanism used in long reciprocating engines and reciprocating

compressors to eliminate sideways pressure on the piston. Also the crosshead enables the

connecting rod to freely move outside the cylinder.

Assembly:

The crosshead, with the help of slide block, reciprocates between two guides

provided in the engine frame. The gudgeon pin, connects the slide blocks with the

crosshead block. This acts as a pin joint for the connecting rod.

Commands used:

Part diagram:




Assembly:


→ Ok

Result:

Thus the given various part of cross head had been created and assembled by using


Ex. No: 11 3D ASSEMBLY OF CROSS HEAD

DATE:

https://en.wikipedia.org/wiki/Reciprocating_engine


Ex. No: 12 3D ASSEMBLY OF CONNECTING ROD

DATE:


Aim:

To create various parts of connecting rod and assemble them by using standard

CAD software Pro-E.

Hardware required:



Software required:

Pro-E Wildfire 4.0


A connecting rod is an engine component that transfers motion from the piston to

the crankshaft and functions as a lever arm.

Assembly:

The bearing bush which is in one piece, is fitted at the small end of the connecting

rod. The small end of the rod is connected to the piston. The main bearing bush, which is

split into two halves, is placed at the big end of the connecting rod. The big end of the rod

is connected to the crank pin of the center crank. First, the split bearing brasses are placed

on the crank pin, then the big end of the connecting rod and the cap are clamped onto these,

by means of two bolts and nuts.

Commands used:

Part diagram:




Assembly:


→ Ok


DATE:



DATE:


Result:

Thus the given various part of connecting rod had been created and assembled by



DATE:


Ex. No: 13 3D ASSEMBLY OF PISTON

DATE:


Aim:

To create various parts of piston and assemble them by using standard CAD

software Pro-E.

Hardware required:



Software required:

Pro-E Wildfire 4.0


A piston is a component of reciprocating engines, used to transfer force from

expanding gas in the cylinder to the crankshaft via a piston rod and/or connecting rod.

Assembly:

The connecting rod is attached to the piston by a swiveling gudgeon pin. This pin is

mounted within the piston. The pin itself is of hardened steel and is fixed in the piston, but

free to move in the connecting rod.

Commands used:

Part diagram:




Assembly:


→ Ok

Result:

Thus the given various part of connecting rod had been created and assembled by


Ex. No: 13 3D ASSEMBLY OF PISTON

DATE:


https://en.wikipedia.org/wiki/Crankshaft

https://en.wikipedia.org/wiki/Piston_rod

https://en.wikipedia.org/wiki/Connecting_rod

https://en.wikipedia.org/wiki/Gudgeon_pin


Ex. No: 14 3D ASSEMBLY OF CRANK SHAFT

DATE:


Aim:

To create various parts of crank shaft and assemble them by using standard CAD

software Pro-E.

Hardware required:



Software required:

Pro-E Wildfire 4.0


A crankshaft is a mechanical part able to perform a conversion between

reciprocating motion and rotational motion. In a reciprocating engine, it translates

reciprocating motion of the piston into rotational motion.

Assembly:

The crankshaft has a linear axis about which it rotates, typically with several bearing

journals riding on replaceable bearings (the main bearings) held in the engine block.

Commands used:

Part diagram:




Assembly:


→ Ok

Result:

Thus the given various part of crank shaft had been created and assembled by using


Ex. No: 14 3D ASSEMBLY OF CRANK SHAFT

DATE:

https://en.wikipedia.org/wiki/Reciprocating_motion

https://en.wikipedia.org/wiki/Rotational_motion


https://en.wikipedia.org/wiki/Reciprocating_motion

https://en.wikipedia.org/wiki/Piston

https://en.wikipedia.org/wiki/Axis_of_rotation

https://en.wikipedia.org/wiki/Bearing_journal



https://en.wikipedia.org/wiki/Bearing_%28mechanical%29

https://en.wikipedia.org/wiki/Main_bearing


Ex. No: 15 3D ASSEMBLY OF SAFETY VALVES

DATE:


Aim:

To create various parts of safety valves and assemble them by using standard CAD

software Pro-E.

Hardware required:



Software required:

Pro-E Wildfire 4.0


Safety valves are used to release some of the steam from the boiler when the

pressure rises higher than the safe limit.

Assembly:

The valve seat is screwed in the valve body. The spindle and toggle together keeps

the valve 3 pressed against the seat. The top of the valve body is closed with a cover with

the help of six studs. A cover bush is used to prevent the leakage through the central hole

of the cover. A lever guide is screwed to the cover in order to restrict the lever movement.

The weight is attached to the lever by means of lever pin. The toggle is held in position by

means of toggle pin. Fulcrum pin is used to connect the lever and the cover, to act as the

fulcrum.

Commands used:

Part diagram:




Assembly:


→ Ok


DATE:



DATE:


Result:

Thus the given various part of safety valves had been created and assembled by



DATE:


Ex. No: 16 3D ASSEMBLY OF NON-RETURN VALVES

DATE:


Aim:

To create various parts of non-return valves and assemble them by using standard

CAD software Pro-E.

Hardware required:



Software required:

Pro-E Wildfire 4.0


Valve is a device used for regulating the flow of fluid. In the non-return valve, the

pressure of the fluid allows the flow in one direction only.

Assembly:

It consists of a body with flanges at right angle, for the purpose of mounting the

same. The valve seat is introduced into the body from top and secured in place by set-

screw. The valve is also introduced from top and located in the valve seat. The valve seat

allows free sliding of the valve in it. The studs are first screwed into the body and after

placing the cover, it is tightened with nuts.

Commands used:

Part diagram:




Assembly:


→ Ok

Result:

Thus the given various part of non-return valves had been created and assembled by


Ex. No: 16 3D ASSEMBLY OF NON-RETURN VALVES

DATE:



COMPUTER AIDED

PART PROGRAMMING



STUDY OF CNC MACHINES AND PART PROGRAMMING

Introduction:

CAM:

CAM is a team, which means the Computer Aided Manufacturing. CAM can be

defined, as the use of the computer systems to plan, manage and control the operation of

manufacturing interface with the plant is production resources.

CNC machines:

CNC stands for Computer Numerical Controlled machine is on NC system that

utilizes a delectated stored program computer to perform some are all the basic numerical

control functions. Part programming are entered and stored in computer memory CNC

offers additional flexibility and computation capacity. New system options can be

incorporated into the CNC controller simple by programming the unit.

Classification of CNC machines:

1) MACHINING CENTRE

a) Horizontal spindle machining center

b) Vertical spindle machining center

c) Universal machines.

2) TURNING CENTER CNC LATHES

a) Horizontal machines

b) Chucking machines

c) Shaft machines

d) Universal machines

3) CNC DRILLING AND MILLING MACHINES

4) CNC GRINDING MACHINE

a) Surface grinding

b) Cylindrical grinding

c) Tool and cutter grinder

d) Profile grinder

5) GEAR HOBBING MACHINES

6) PUNCHING AND FORMING MACHINES


Co-ordinate system:

In order for the part programmer to plan the sequence of positions of moments of

the cutting tool. Machine to the WIP, it is memory to establish a standard axis system by

which the relative positions can be specified. Two axis “X & Y” are defined in the plane of

the table, the „z‟ axis in perpendicular. In this plane of the table the vertical motion of the

spindle controls the „z‟ direction. The positive and negative directions motion of the tool.

Programming methods:

1) Incremental method

2) Absolute method

1) Incremental Method:

In this method, every point is considered as origin from this point, the values are

calculated, for example

Point A = (10, 0)

Point B = (20, 0)

Point C = (10, 0)

Point D = (20, 0)

2)Absolute method:

In this absolute system, the set point is considered as a reference point as from that

point, all the values are calculated, for example

Point A = (10, 0)

Point B = (20, 0)

Point C = (30, 0)

Point D = (50, 0)

Programming methods:

In CNC machines program are programmed by two methods.

1) Manual part programming

2) Computer assisted part programming

1) Manual part programming:

To prepare a part program using the manual method, the programmer writes the

machining instruction is must be hence, menu script the instruction is must be prepared in a


very precise manner because the typist prepare the NC type directory from the Manu script

some in various form expending on the machine tool and tape format used.

2) computer assisted part programming:

In the more complicated point and in contour application using manual part

programming because an extremely tedious basic and subject to errors. It is must more

appropriate to employ the high speed digital computer to assist the part programming

languages system have been developed to perform automatically most of the calculation

which the programmer would otherwise be forced to do. It several time and more efficient

part program.

PREPARATORY FUNCTIONS (G-CODE):

Preparatory functions are used for cutting operations like facing, turning, thread

cutting, drilling, etc.,

MISCELLANCEOUS FUNCTIONS (M-CODE) :

Miscellaneous functions are used for other than cutting operations like spindle

ON/OFF, coolant ON/OFF, tool change, etc.,

COMMON G CODES AND M CODES FOR CNC MACHINE CONTROLS

CNC G codes

G00 - Positioning at rapid speed; Mill and Lathe

G01 - Linear interpolation (machining a straight line); Mill and Lathe

G02 - Circular interpolation clockwise (machining arcs); Mill and Lathe

G03 - Circular interpolation, counter clockwise; Mill and Lathe

G04 - Mill and Lathe, Dwell

G09 - Mill and Lathe, Exact stop

G10 - Setting offsets in the program; Mill and Lathe

G12 - Circular pocket milling, clockwise; Mill

G13 - Circular pocket milling, counterclockwise; Mill

G17 - X-Y plane for arc machining; Mill and Lathe with live tooling

G18 - Z-X plane for arc machining; Mill and Lathe with live tooling

G19 - Z-Y plane for arc machining; Mill and Lathe with live tooling

G20 - Inch units; Mill and Lathe


G21 - Metric units; Mill and Lathe

G27 - Reference return check; Mill and Lathe

G28 - Automatic return through reference point; Mill and Lathe

G29 - Move to location through reference point; Mill and Lathe

G31 - Skip function; Mill and Lathe

G32 - Thread cutting; Lathe

G33 - Thread cutting; Mill

G40 - Cancel diameter offset; Mill. Cancel tool nose offset; Lathe

G41 - Cutter compensation left; Mill. Tool nose radius compensation left; Lathe

G42 - Cutter compensation right; Mill. Tool nose radius compensation right; Lathe

G43 - Tool length compensation; Mill

G44 - Tool length compensation cancel; Mill (sometimes G49)

G50 - Set coordinate system and maximum RPM; Lathe

G52 - Local coordinate system setting; Mill and Lathe

G53 - Machine coordinate system setting; Mill and Lathe

G54~G59 - Work piece coordinate system settings #1 to #6; Mill and Lathe

G61 - Exact stop check; Mill and Lathe

G65 - Custom macro call; Mill and Lathe

G70 - Finish cycle; Lathe

G71 - Rough turning cycle; Lathe

G72 - Rough facing cycle; Lathe

G73 - Irregular rough turning cycle; Lathe

G73 - Chip break drilling cycle; Mill

G74 - Left hand tapping; Mill

G74 - Face grooving or chip break drilling; Lathe

G75 - OD groove pecking; Lathe

G76 - Fine boring cycle; Mill

G76 - Threading cycle; Lathe

G80 - Cancel cycles; Mill and Lathe

G81 - Drill cycle; Mill and Lathe

G82 - Drill cycle with dwell; Mill


G83 - Peck drilling cycle; Mill

G84 - Tapping cycle; Mill and Lathe

G85 - Bore in, bore out; Mill and Lathe

G86 - Bore in, rapid out; Mill and Lathe

G87 - Back boring cycle; Mill

G90 - Absolute programming

G91 - Incremental programming

G92 - Reposition origin point; Mill

G92 - Thread cutting cycle; Lathe

G94 - Per minute feed; Mill

G95 - Per revolution feed; Mill

G96 - Constant surface speed control; Lathe

G97 - Constant surface speed cancel

G98 - Per minute feed; Lathe

G99 - Per revolution feed; Lathe

CNC M Codes

M00 - Program stop; Mill and Lathe

M01 - Optional program stop; Lathe and Mill

M02 - Program end; Lathe and Mill

M03 - Spindle on clockwise; Lathe and Mill

M04 - Spindle on counterclockwise; Lathe and Mill

M05 - Spindle off; Lathe and Mill

M06 - Tool change; Mill

M08 - Coolant on; Lathe and Mill

M09 - Coolant off; Lathe and Mill

M30 - Program end, return to start; Lathe and Mill

M97 - Local sub-routine call; Lathe and Mill

M98 - Sub-program call; Lathe and Mill

M99 - End of sub program; Lathe and Mill


ALL DIMENSIONS ARE IN „mm‟

Program:

Ex. No: 17 STEP TURNING

DATE:


Aim:

To write and simulate part program of the given component for the required

dimensions by using CNC trainer lathe.

Equipment required:

M TAB CNC lathe (FLEXTURN)

Travel x - axis – 95 mm

Travel z - axis – 210 mm

Spindle speed – 150 - 4000 rpm

Tool holder – 8 station ATC

Algorithm:

1. First start the program.

2. Mention the feed rate whether metric or inches.

3. Indicate the reference point.

4. Change the tool for required operation

5. Give the spindle speed.

6. Transverse motion of the tool to x31z1.

7. Give the linear interpolation motion of tool and feed rate.

8. Move the tool in x and z direction to obtain the required size.

9. Move the tool to required point.

10. Stop the program.

Result:

Thus the program for step turning operation is written & simulated by using CNC

trainer lathe.

Ex. No: 17 STEP TURNING

DATE:



Program:

Ex. No: 18 EXTERNAL MULTIPLE TURNING CYCLE

DATE:


Aim:



Equipment required:






Algorithm:











Result:

Thus the program for external multiple turning operation is written & simulated by

using CNC trainer lathe.

Ex. No: 18 EXTERNAL MULTIPLE TURNING CYCLE

DATE:



Program:

Ex. No: 19 GROOVING AND THREADING OPERATIONS

DATE:


Aim:



Equipment required:






Algorithm:











Result:

Thus the program for grooving and threading operations are written & simulated by


Ex. No: 19 GROOVING AND THREADING OPERATIONS

DATE:



Program:

Ex. No: 20 DRILLING AND BORING OPERATIONS

DATE:


Aim:



Equipment required:






Algorithm:











Result:

Thus the program for drilling and boring operations are written & simulated by


Ex. No: 20 DRILLING AND BORING OPERATIONS

DATE:



Program:

Ex. No: 21 INTERNAL MULTIPLE TURNING CYCLE

DATE:


Aim:



Equipment required:






Algorithm:











Result:

Thus the program for internal multiple turning operations are written & simulated

by using CNC trainer lathe.

Ex. No: 21 INTERNAL MULTIPLE TURNING CYCLE

DATE:



Program:

Ex. No: 22 CONTOUR MILLING

DATE:


Aim:


dimensions by using CNC trainer mill.

Equipment required:

M TAB CNC milling machine (FLEXMILL)


Travel y - axis – 150 mm




Algorithm:




4. Change the tool for required operation.







Result:

Thus the program for contour milling is written & simulated by using CNC trainer

Mill.

Ex. No: 22 CONTOUR MILLING

DATE:



Program:

Ex. No: 23 DRILLING

DATE:


Aim:



Equipment required:







Algorithm:











Result:

Thus the program for drilling operation in milling is written & simulated by using

CNC trainer Mill.

Ex. No: 23 DRILLING

DATE:



Program:

Ex. No: 24 MIRRORING

DATE:


Aim:



Equipment required:







Algorithm:











Result:

Thus the program for mirroring operation in milling is written & simulated by using

CNC trainer Mill.

Ex. No: 24 MIRRORING

DATE:



Program:

Ex. No: 25 CIRCULAR POCKETING

DATE:


Aim:



Equipment required:







Algorithm:











Result:

Thus the program for circular pocketing in milling is written & simulated by using

CNC trainer Mill.

Ex. No: 25 CIRCULAR POCKETING

DATE:

Documents

DHANALAKSHMI COLLEGE OF ENGINEERING - …dcemecha.weebly.com/uploads/5/8/0/3/58036683/cad_cam_-_22.12.15-1.pdfDHANALAKSHMI COLLEGE OF ENGINEERING DR ... • To gain practical experience