Cad Cam Final Manual (1)

8/18/2019 Cad Cam Final Manual (1)

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Merchant Education Campus

Merchant Engineering College, BasnaMehsana – Visnagar Highway,

Basna – 384315

Mechanical Engineering Department

1st

Semester Master of Engineering

Laboratory Manual

CAD CAM SYSTEMS (2715002)

Year: 2014-15

Name of Student: ________________________________

Enrollment No: __________________________________

Branch: _________________________________________


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Merchant Engineering College, Basna

Certificate

This is to certify that Mr. / Miss / Mrs._______________________

___________________Enrollment No.__________________ of 1st

Semester Master of Engineering Class has satisfactory completed the

course in CAD CAM SYSTEM (2715002) within four walls of

Merchant Engineering College, Basna.

Date of submission: __________________

Staff In charge Head of Department


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Cad Cam System(2715002)

List of Experiments

Sr.

No.Title Page

No.

Date of

completionSign.

1Study of Solid Modeling and Making

Models Using Commercial Software1

2

To Study About Manual Part

Programming Making Models Using

Commercial Software.

7

3 To Study About CAM Software 16

4

Study Of Operate CNC Milling

Machine Load A G-Code Program

And Execute Actual Machining

20

5

Study Of Operate CNC Turning

Machine. Load A G-Code ProgramAnd Execute Actual Machining

23


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CAD CAM SYSTEM 2715002

1

EXPERIMENT NO: - 1

AIM: - Study of Solid Modeling and Making Models Using Commercial

Software

To eliminate all kinds of atriguities in representation and manipulation of object, the

solid modeler was developed. The completeness of the information contained in a solid

model allows the automatic production of realistic images of shape and automation of process

of interfaces checking. Interfaces can integrate the model and extracts useful data. The model

can serve as a geometric input for finite element analysis or for manufacturing task such as

generation of instruction for CNC machining.

Application of solid modeling:

The use of solid modelling technique is rapidly increasing as the industry moves

towards total automations and integration.

1. Graphics and presentation:

The solid model can be used to generate the necessary engineering of drawing

of the objects. Another role would be to assist the visualization of the object by

creating a photo realistic image of the model. This presentation can also be used for

generating product literatures.

2. Engineering design:

The solid generated can be integrated and useful design information related to

mass and geometric properties can be generated. The weight information can also be

useful for costing analysis in case of custom built applications. In many cases such as

vehicle design, the centre of gravity of the vehicle is an important design requirement.

This can also be determined from solid model. Solid model can also be used for


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interference checking and fouling one of the most important applications of the solid

modeller is to use it as an input to FEA software. Solid models can be used for

kinematics and mechanism analysis and for simulation study.

3. Manufacturing:Solid models can be used for tool path generation and verification. It is also

used for process planning and dimension inspection.

4. Assembly:

This is an important area of application of solid models, especially in case of

automation and robotics. The model can be used for automated assemblies as in

flexible manufacturing system.

1.1 Introduction to Different Features of Pro-E:

Following are the important features of Pro – E.

Protrusion Feature

Hole Feature

Round Feature

Chamfer Feature

Rib Feature

Shell Feature

1.2 Protrusion Feature:

Protrusion is the method of adding a solid material. I.e. it can add material in a void or

on An existing solid. Pro/engineer provides the following basic method of adding material to a

model.

Extrude – creates a solid feature by extruding a section normal to the section plane.

Revolve - creates a solid feature by revolving a section about an axis.

Sweep - creates a solid feature by sweeping a section about a trajectory.Blend - creates a solid feature by blending various cross sections at various level.

1.3 Hole Feature:

Insert > Hole


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Feature > Create > Solid > Hole

When you invoke this command pro-Engineer displays the hole dialog box.

1.3.1 Hole Type:

Straight Hole: Straight Hole is An Extruded Cut with a Circular Section. The Diameter of the

hole is Constant. It Begins At the Placement Surface and Extends To the Specified End Surface

or User Defined Depth.

Sketched Hole: A Sketched Hole is created by sketching a section for revolution in sketcher

mode and placing it into the part. Sketched holes are always blind and one sided. A tapered

Hole could be created as a sketched hole.

Standard Hole: Standard Hole is the combination of the sketched and extruded feature. It is

based on industries standard fastener tables. You can calculate either the tapered or the

clearance diameter appropriate to the selected faster. You can use system supplied

standard lookup tables for these diameters or create your own.

1.4 Round Feature:

Insert > Round

Feature > Create > Solid > Round

In Pro/Engineer Round option is used to create a filleting between surfaces or in place of a

middle surface. Surfaces can be Pro/Engineer Zero thickness quilts, surfaces and surfaces of

solid Models.

Simple & Advance Rounds you can create two different types of round simple and advanced.

The type of round you create depend on the complexity of the reference geometry and on your

need to customize the default round geometry supplied by the system.


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Generally, after you specify the placement references and radius of the round, the system

generates the default round geometry by using some default attributes. The System Normally

terminates the round geometry whenever it encounters non-tangents Edges.

1.5 Chamfer Feature:

Insert > Chamfer

Feature > Create > Solid > Chamfer

In Pro/ENGINEER chamfer command is used to create a beveled surface. There are two types

of chamfer.

1. Edge

2. Corner

Edge: An Edge Chamfer removes a flat section of material from a selected edge to create a

beveled surface between the two original surfaces common to that edge. One can select multiple

edges to create an edge chamfer

45 x d: this option is used to create a chamfer that is at angle of 45 degrees to both surfaces &

distance d from the edge along each surface. The dimension appears as "45 x d", but you can

modify the distance, D only. You can create 45 x d chamfers only on an edge formed by the

inter section of two perpendicular surfaces.

d x d: creates a chamfer that is at a distance d from the edge along each surface. If you modify

the chamfer, the system displays the distance as the only dimension.

d1 x d2: Creates a chamfer at a distance d1 from the selected edge along one surface and a

distance d2 from the selected edge along the other surface. the system displays both distances

their respective surfaces when you modify the chamfer.

Ang x d: Creates a chamfer at a distance d from the selected edge along one adjacent surface at


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a specified angle to that surface. The system displays both values as dimensions when you

modify the chamfer. you can use this option between two planer surfaces only.

Corner: A corner chamfer removes material from the corner or a part. In the next step is you

have to select the corner and the edges. Pro/ENGINEER Displays the pick/Enter Menu, which

allows you to specify the location of the chamfer vertex on the highlighted edge.

1.6 Rib Feature:

Insert > Rib

Feature > Create > Solid > Rib

A Rib is a special type of protrusion designed to create a thin wall or we to support to surfaces.

The Rib is used to increase the strength of the part. You always ketch a rib from a side view it

grows symmetrically about the sketching plane.

Straight Rib: Ribs that are not created on through/Axis datum planes are extruded

symmetrically about the sketching plane. You must skill sketch the Ribs as open sections.

Because you are sketching an open section Pro/Engineer may be uncertain about the side to

which the rib is used to be added. This system displays the Direction menu after the Rib

Section has been regenerated. Pro/Engineer adds all material in the direction of the arrow. If an

incorrect choice is made, modify the arrow direction using the feat menu option redefine.

Rotational Ribs: You can create rotational Ribs on through/axis datum planes. You can sketch

the Rib to the silhouette of the parent feature to create the solid geometry, Pro/Engineer

revolves the section about the axis of the parent, making a wedge that is symmetrical about the

sketching plane. Pro/Engineer then trims the wedge with two planes parallel to the

sketching surface; the distance between these planes corresponds to the thickness of the

Rib. You can place a rotational rib only on any surface of revolution. Note that angled surface

of the Rib is Conical, Not Planer.


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1.7 Shell Feature:

Insert > Shell

Feature > Create > Solid > Shell

The Shell option Removes a surface or surfaces from the solid then hollows out the inside,

leaving a shell of a specified wall thickness. When Pro/Engineer Makes the shall all the

features that ware added to the solid before you chose shell are hollowed out. Therefore, the

order of feature creation is very important when you use shell. After involving this command

Pro/Engineer Displays the feature creation dialog box. If desired, select the optional element

spec thick to specify thickness individually.


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EXPERIMENT NO: - 2

AIM: To Study about Manual Part Programming.

2.1 Introduction:

The part programming is the set of machining instructions, written in standard format, for the

NC/CNC machine.

These instructions can be either punched on tape using the tape punching machine or directly fed

to the machine.

2.2 Types of Programming Methods:

2.2.1 Absolute Co-ordinate System:

In the absolute system the co-ordinates of a point are always referred with reference to the same

datum. The datum positions in the X-axis, y-axis and Z-axis are defined by the user/programmer

before starting the operation on the machine. The major advantage of using absolute system is

that it is very easy to check or correct a programme using this method. If a mistake made in the

value of any dimension in a particular block, it may affect that dimension only and once the error

is corrected there will be no further problems.

Fig 2.1 Absolute Coordinate System


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2.2.2 Incremental Co-ordinate System:

In the incremental system the co-ordinates of any point are calculated with reference to the previous point i.e. the point at which the cutting tool is positioned is taken as datum point for

calculating the coordinates of the next point to which movement is to be made.

The difference between absolute system and incremental system can be better appreciated with

the help of component shown in Fig. The co-ordinates of points PI, P2, P3 and P4 in absolute

and incremental system are given in the table below. In addition, the position of a point may be

defined using the polar co-ordinates where the distance of the point from a specified datum point

and the angle from a specified datum axis give the coordinates of the points.

Fig 2.2 Incremental Coordinate System


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2.3 Axis Identification in NC/CNC Machines:

Most of the machines have two or more sideways, disposed at right angles to each other, along

which the slides are displaced. Each slide can be fitted with a control system and for the purposeof giving commands to the control system the axis have to be identified. The basis of axis

identification is the 3-dimensional Cartesian co-ordinate system and the three axis of movement

are identified as X, Y and Z axis. The possible linear and rotary movements of machine

slides/work piece are shown in Fig. Rotary movements about X, Y and Z axis are designated as

A, B and C respectively.

The main axis of movement and the direction of movement along this axis are identified as

follows:

Z-axis: The Z-axis is always the axis of main spindle of the machine. It does not matter whether

the spindle carries the work piece or the cutting tool. If there are several spindles on a machine,

one spindle is selected as the main spindle and its axis is then considered to be Z-axis On vertical

machining centres, the Z-axis is vertical and on horizontal machining centres and turning centres,

the Z-axis is horizontal. Z movement (+ Z) is in the direction that increases the distance between

the work piece and the tool.

X-axis: The X-axis is always horizontal and is always parallel to work holding surface. If the Z-

axis is vertical, as in vertical milling machine, positive X-axis (+X) movement is identified as

being to the right, when looking from the spindle towards its supporting column.

If Z-axis is also horizontal as in turning centres, positive X-axis motion is to the right, when

looking from the spindle towards the workspace.

"Y-axis: The Y-axis is always at right angles to both the X-axis and Z-axis. Positive Y-axis

movement (+ Y) is always such as to complete the standard 3-dimensional co-ordinate system.

Rotary axis: The rotary motion about the X, Y and Z-axis are identified by A, B, C respectively.

Clockwise rotation is designated positive movement and counter-clockwise rotation as negative


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movement. Positive rotation is identified looking in + X, + Y and + Z directions respectively.

Fig 2.3 Axis Designation of Milling and Drilling m/c.

2.4 Part Programing:

The part programming of any CNC system consists of the calculation of a tool path along which

the machine operations will be performed and the arrangement of those given and calculated

data in standard format, which could be converted to an acceptable form for a particular machine

control system.

The necessary data for producing a part is as follows.

A) Information taken directly from a drawing: 1.

Dimensions: length, width, height, radius, etc. 2.

Segment shape: linear, circular or parabolic. 3.


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Diameter of hole to be drilled.

B) Date established according to surface quality, required tolerances, type of work piece and

cutting tool:1. Feed

2. Cutting speeds.

3. Turn ON and turn OFF coolant.

C) Data determined by the part programmer:

1. Direction of cutting circle clockwise or anti-clockwise

2. Tool change.

D) Information depending on the particular CNC system e.g. canned cycles available in CNC

systems vary from manufacturer to manufacturer.

Part programming is of two types:

1. Manual

2. Computer assisted.

In the manual part programming, the data required for machining a part is written in a standard

format on a special program sheet. It is then entered in the control system through keyboard or

through paper punch/reader.

When it becomes very complicated and time consuming, computer assisted part programming is

preferred especially in milling, too many mathematical calculations are required to be performed.

This can be efficiently done with computer assisted part Programming.

CNC part program for machining of the component as shown in fig on CNC turning centre

[facing & boring operation]

2.4.1 Codes Used In Part Programming:


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There are many codes specifying t h e particular area of instructions required to control the

machine tool. The tool path of the CNC machine is then described in machine codes, which

usually take the form.N-G-X Y-Z-I-J-K-F-S-T-M

Where

N = S equence number

G = Preparatory function

XYZ = Dimension words

IJK = Dimension words for arcs and circle

F = Feed rate

S = Spindle speed

T = T ool selection

M = Miscellaneous function

1. "N'' - The sequence number is designated by the address character "N" and three numeric

digits. The word indicates the start of a specific sequence of operations. It is the first word for

the programming sequence within the block.

2. "G" - The preparatory function is designated by the character "G" and two numeric digits.

This word immediately follows the sequence number word. The "G" word prepare the numerical

control unit for a specific mode of operation, Many G-functions have been standardized G-

functions are listed below.

G00 - Rapid movement

G01 - Linear interpolation

G02 - Circular interpolation-c/w

G03 - Circular interpolation – cc/w

G04 - Dwell

G33 - Thread cutting

G40 -Cutter compensation cancel


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G41 -Cutter compensation-left

G42 -Cutter compensation-right

G70 -Dimensions in inches

G71 -Dimensions in mmG90 - Absolute Co-ordinates system

G91 - Incremental Co-ordinates system

G92 -Zero preset

G94 -Feed rate in mm/min

G95 -Feed rate in mm/rev

3."XYZ" - These addresses signify axis motions in accordance with the designated axis motions

of the machine tool. These addresses could be supplemented by W, A, B AND C etc. if the

machine has extra axes of motion.

4 "IJK" These addresses are used when employing circular interpolation to specify the centre of

the programmed arc. I, J, and K which are the equivalent to X, Y, and Z but with reference to the

start point.

5 "F”: The feed rate for slide displacement is expressed in mm/min and is a three digit number

prefixed by the letter "F".

6 "S”- The spindle is expressed in rev. /mm, and is a three digit number prefixed by the letter

"S".

7 "T" - The tool function is designated by the letter "T" and a maximum of five numeric digits

this word immediately follows the spindle speed word. Tool function code identifies the tool to

be used or loaded if at a tool change.

8 "M"-The miscellaneous function is designated by the letter M and two numerical digits. These

functions are a family of instructions that cause the starting, stopping or setting of a variety of

machine functions. Some M-functions have been standardized by popular usage and others have


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special significance for individual machines. The common standardized functions are listed

below.

M02 -programme stopM03 - Spindle on clockwise

M04 -spindle on counter clockwise

M05 -spindle stop

M06 -tool change

M08 -coolant on

M09 -coolant off

M10 -clamp

M11 -unclamp

M60 -work piece change

2.4.2 Programming Fundamentals:

Machining involves an important aspect of relative movement between cutting tool and work

piece. In machine tools this is accomplished by either moving the tool with respect to work piece

or vice versa. In order to define relative motion of two objects, reference directions are required

to be defined. These reference directions depend on type of machine tool and are defined by

considering an imaginary coordinate system on the machine tool. A program defining motion of

tool / work piece in this coordinate system is known as a part program. Lathe and Milling

machines are taken for case study but other machine tools like CNC grinding; CNC hobbing,

CNC filament winding machine, etc. can also be dealt with in the same manner.

2.4.3 Zero Points and Reference Points:

On each CNC machine, zero points and reference points are defined. The part programme for

any component is developed relative to these points.

i. Machine Zero (machine origin): The machine zero point is at the origin of the coordinate


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measuring system of the machine. The machine zero point is fixed and cannot be shifted.

The machine zero point is also called 'Home position'

ii.

Work Zero (part origin): Work piece zero or datum may be defined as a point, line orsurface on the component drawing to which all the dimensions referenced. For writing

the part programme, the programmer should know the relationship between the work

piece zero coordinates and machine zero coordinates. In other words, all the coordinate

values for slide movements have to be defined with reference to the machine zero.

However this complicates the part programmer‟s job. To simplify the part programme

writing, the CNC machines have the facility of floating zero or zero shifting.

iii. Zero Shifts: The zero shifting facility is available on CNC machines. This facility allows

the machine tool zero point to be shifted to any position within the programmable area of

the machine.

iv. Program Origin: It is also called home position of the tool. Program origin is point from

where the tool starts for its motion while executing a program and returns back at the end

of the cycle. This can be any point within the workspace of the tool which is sufficiently

away from the part. In case of CNC lathe it is a point where tool change is carried out.


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EXPERIMENT NO: - 3

AIM: To Study about CAM Software:

3.1 Introduction:

Founded in Massachusetts in 1983, CNC Software, Inc. is one of the oldest developers of PC-based

computer-aided design / computer -aided manufacturing (CAD/CAM) software. They are one of the first

to introduce CAD/CAM software designed for both machinists and engineers. Master cam, CNC

Software’s main product, started as a 2D CAM system with CAD tools that let machinists design virtual

parts on a computer screen and also guided computer numerical controlled (CNC) machine tools in the

manufacture of parts. Since then, Master cam has grown into the most widely used CAD/CAM package in

the world. CNC Software, Inc. is now located in Tolland, Connecticut.

Master cam’s comprehensive set of predefined tool paths— including contour, drill, pocketing, face, peel

mill, engraving, surface high speed, advanced multiaxis, and many more — enable machinists to cut parts

efficiently and accurately. Master cam users can create and cut parts using one of many supplied machine

and control definitions, or they can use Master cam’s advanced tools to create their own customized

definitions.

Master cam also offers a level of flexibility that allows the integration of 3rd party applications, called C-

hooks, to address unique machine or process specific scenarios.

Master cam’s name is a double entendre: it implies mastery of CAM (computer-aided manufacturing),

which involves today's latest machine tool control technology; and it simultaneously pays homage to

yesterday's machine tool control technology by echoing the older term master cam, which referred to the

main cam or model that a tracer followed in order to control the movements of a mechanically automated

machine tool.

http://en.wikipedia.org/wiki/CAD/CAMhttp://en.wikipedia.org/wiki/Machinisthttp://en.wikipedia.org/wiki/Engineerhttp://en.wikipedia.org/wiki/2Dhttp://en.wikipedia.org/wiki/2Dhttp://en.wikipedia.org/wiki/Numerical_controlhttp://en.wikipedia.org/wiki/Tolland,_Connecticuthttp://en.wiktionary.org/wiki/double_entendre#Nounhttp://en.wikipedia.org/wiki/Computer-aided_manufacturinghttp://en.wikipedia.org/wiki/Camhttp://en.wikipedia.org/wiki/Machine_toolhttp://en.wikipedia.org/wiki/Machine_toolhttp://en.wikipedia.org/wiki/Camhttp://en.wikipedia.org/wiki/Computer-aided_manufacturinghttp://en.wiktionary.org/wiki/double_entendre#Nounhttp://en.wikipedia.org/wiki/Tolland,_Connecticuthttp://en.wikipedia.org/wiki/Numerical_controlhttp://en.wikipedia.org/wiki/2Dhttp://en.wikipedia.org/wiki/Engineerhttp://en.wikipedia.org/wiki/Machinisthttp://en.wikipedia.org/wiki/CAD/CAM


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3.2

CAM Software:

Master cam product levels:

With the release of Mastercam X (10), the application became a true Windows-based application, as

opposed to one ported over from DOS. It also represented a fundamental shift in the way the application

was configured. Mastercam X2 provided many enhancements over the previous version and adopted a

true Windows application feel. Mastercam supports many types of machines, each with a choice of levels

of functionality, as well as offers optional add-ins for solid modeling, 4-axis machining, and 5-axis

machining.

The following list describes the Master cam product levels:

Design — 3D wireframe geometry creation, dimensioning, importing and exporting of non-

Mastercam CAD files (such as AutoCAD, SolidWorks, Solid Edge, Inventor, Parasolid, etc.).

Mill Entry — Includes Design, plus various toolpaths (top construction and tool planes only),

posting, backplot, verify.

Mill, Level 1 — Includes Mill Entry, plus surface creation, many additional toolpaths (for all

construction and tool planes), highfeed machining, toolpath editor, toolpath transforms, stock

definition.

Mill, Level 2 — Includes Mill, Level 1, plus additional toolpaths, toolpath projection, surface

rough and finish machining, surface pocketing, containment boundaries, check surfaces.

Mill, Level 3 — Includes Mill, Level 2, plus 5-axis wireframe toolpaths, more powerful surface

rough and finish machining, multiaxis toolpaths.

5-Axis add-on — 5-Axis roughing, finishing, flowline multisurface, contour, depth cuts, drilling,

advanced gouge checking.

Lathe Entry — 3D wireframe geometry creation, dimensioning, importing and exporting of non-

Mastercam CAD files (such as AutoCAD, SolidWorks, Solid Edge, Inventor, Parasolid, etc.),

various toolpaths, backplot, posting.

Lathe, Level 1 — Includes Lathe Entry, plus surface creation, C-axis toolpaths, stock definition,stock view utility.

Router Entry — 3D wireframe geometry creation, dimensioning, importing and exporting of non-

Mastercam CAD files (such as AutoCAD, SolidWorks, Solid Edge, Inventor, Parasolid, etc.),

various toolpaths (top construction and tool planes only), toolpath transformation in top plane,

backplot, verify, posting.

http://en.wikipedia.org/wiki/DOShttp://en.wikipedia.org/wiki/DOS


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Router — Includes Router Entry, plus surface creation, rectangular geometry nesting, additional

toolpaths (for all construction and tool planes), highfeed machining, toolpath editor, full toolpath

transformations, stock definition.

Router Plus — Includes Router, plus additional toolpaths, toolpath projection, surface rough and

finish machining, surface pocketing, containment boundaries, check surfaces.

Router Pro — Includes Router Plus, plus True Shape geometry nesting, 5-axis toolpath

functionality, multiple surface rough and finish machining, multiaxis toolpaths, toolpath nesting.

Wire — 2D and 3D geometry creation, dimensioning, various 2-axis and 4-axis wirepaths,

customizable power libraries, tabs.

Art — Quick 3D design, 2D outlines into 3D shapes, shape blending, conversion of 2D artwork

into machinable geometry, plus exclusive fast toolpaths, rough and finish strategies, on-screen

part cutting.

The Router products are targeted to the woodworking industries but are virtually identical to the Mill line.

3.3 The Minimum Computer System Recommended Is:

486 IBM-PC or compatible

16Mb RAM, 20Mb HDD

EGA color graphics or better

Windows 3.1x or 95

Math coprocessor

1 Parallel Port

Mouse or pointing device

3.4 General Software Features:

Total tool path control

Automatic tool width compensation

Complete rough cut/finish cut control

Automatic rough cutting to depth

Island avoidance with pockets

Import ASCII points as splines as well as points or lines


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Improved algorithm for surface intersections and 3-D filleting

Improved surface handling

Infinite look-ahead on contouring

Expanded IGES formats

Double precision internal calculations

CAM package compatible with most CAD systems

DXF, IGES, CADL and ANVIL drawing conversion including CadKEY® , AutoCAD®,

VersaCAD®, etc.

3-D drawing capabilities include points, lines, arcs and splines

3-D cutter display for tool path verification

Includes Master DRAFT, a complete CAD program for dimensioning of drawings

Advanced gouge checking for 3-D surfacing and 2-D contouring

Importing and machining of NURBS surfaces

3.5 Surface Generation Capabilities:

2-D and 3-D contours

Pockets with island avoidance

Ruled, swept and lofted surface

Surface of revolution

Coons patches

Projections of arbitrary surfaces

Intersections of surfaces


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PRACTICAL 04

AIM: Study of operate CNC milling machine .load a G-code program and

execute actual machining

BLOCK CONFIGURATION.

Sample Milling Program


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# 1 Name of Prog.

N10 G90 G94 G21 G54 LF.

N20 M06 T01 LF…………………….. T01 END MILL 10 MM. DIA.

N30 M03 S2000 LF.

N40 G00 X0 Y0 Z3 LF.

N50 G01 G41 X0 Y0 F0.5 LF.

X0 Y0 Z-1 F0.5 LF.

X0 Y70 LF.

X40 Y100 LF.

X90 Y100 LF.

G02 X100 Y90 CR=10 F0.3 LF.

G01 X100 Y20 F0.5 LF.

G03 X80 Y0 CR=20 F0.3 LF.

G01 X0 Y0 Z-1 F0.5 LF

G01 G40 X0 Y0 Z3 F0.5 M05 LF.

M06 T02 LF……………. T02 END MILL 8 MM. DIA.

M03 S2000 LF.

G00 X50 Y50 Z3 F0.5 LF.

G01 G42 X50 Y50 Z-1 F0.5 LF.

X50 Y75 LF.

X75 Y75 LF.

X75 Y50 LF.

X50 Y50 LF.

G01 G40 X50 Y50 Z3 M05 F0.5 LF.

M06 T03 LF…………………………… T03 DRILL TOOL 20 MM. DIA.

M03 S1000 LF.


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G00 X10 Y10 Z3 LF.

G81 X10 Y10 Z-5 R3 F0.3 LF.

G80 M05 LF.

M06 T04 LF…………………………. T04 DRILL TOOL 09 MM. DIA.

M03 S1000 LF.

G81 X90 Y90 Z-5 R3 F0.3 LF.

G80 M05 LF.

M06 T05 LF………………………….. T05 TAP TOOL 10 MM. DIA.

M03 S500 LF

G84 X90 Y90 Z-5 R3 P2 Q2 F0.2 LF.

G80 M05 LF.

G00 X0 Y0 Z50 LF.

G28 U0 W0 LF.

M30


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Experiment-5

AIM – Operate a CNC turning machine load a G – code program and execute

actual machining

PART PROGRAMMING EXERCISES

Exercise 1. CNC Prgramme for below Figure .

N10 G71 G90 G95 EOB N20 M06 T7 D1 EOB

N30 M03 S2100 EOB N40 G00 X31 Z5 EOB

N50 G01 X31 Z-60 F0.1 EOB N60 G00 X33 Z5 EOB

N70 G00 X30 Z5 EOB N80 G01 X30 Z-60 F0.1 EOB N90 G00 X33 Z5 EOB

N100 G00 X29 Z5 EOB N110 G01 X29 Z-40 F0.1 EOB N120 G00 X33 Z5 EOB N130 G00 X28 Z5 EOB N140 G01 X28 Z-40 F0.1 EOB

N150 G00 X33 Z5 EOB


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N160 G00 X27 Z5 EOB N170 G01 X27 Z-40 F0.1 EOB N180 G00 X 40 Z +5.0 EOB

N190 M02.

Exercise 2. CNC Prgramme fore below Figure .

N10 G710 G71 G90 G95 EOB N20 M06 T1 D1 EOB N30 M03 S2500 EOB

N40 G00 X0 Z3 EOB N50CYCLE95(“SUBTUR1”,0.5,0.4,0.1,0.1,0.09,0.05,0.01,9)EOB N70 M30

SUBRUTINE PRGRAMSUB PRGRAM NAME:SUBTUR1N10 G01 X0 Z0 EOB

N20 X25 Z-10 EOB N30 X25 Z-15 EOB

N40 G03 X25 Z-30 CR=7.5 EOB N50 G01 X25 Z-50 RND=7.5 EOB N60 X40 Z-50 EOB

N70 X40 Z-60 EOB N80 X50 Z-60 EOB

N90 X50 Z-60 CHF=2 EOB N100 X50 Z-65M17


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Exercise No. 3 Simple Part Programme for Turning Operation.

G90 - DIAMETER CUTTING CYCLE

This cycle is used to reduce the diameter of the job. In this cycle the It will beBack to the starting position after cutting the diameter. In this machine the depthof cut is 1mm. T reduce the diameter f the job from 22mm t 18 mm fur G90

Commands are required.

Format:

G90 X__ Z__ F__G90 X__ Z__ R__ F__X = Diameter t be cut

Z = End f cut in Z positionR = Distance and the direction f taper

F = Cutting feed rate (mm/min)

Exercise:

[BILLET X22 Z40 N001 M03 S3000 N002 T0101

N005 G00 X22 Z2 N010 G90 X21 Z-20 F50 N015 G90 X20 Z-20 F50 N020 G90 X19 Z-20 F50 N025 G90 X18 Z-20 F50

N030 M30


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Exercise No. 4 Part programme for shown figure

G73 - PATTERN REPEATING CYCLE

The pattern repeating cycle is also called the closed loop are profile copying

cycle. Its purpose is t minimize the cutting time for roughing material f irregularshapes and from, for e.g. forgings and castings.

Format :

G73 U__ W__ R__G73 P__ Q__ U__ W__ F__ S__

U = X axis distance and direction f relief (radius value)W = Z axis distance and direction f relief.

R = N. f divisions from the pattern.P = Starting block n. f the prgram for the required shapeQ = Final block n. f the prgram for the required shape

U = Finishing allowance in X direction.W = Finishing allowance in Z direction.

F = Feed-rate for cutting(mm/min).S = Spindle speed(RPM).

Exercise:[BILLET X22 Z40

N0000 T0101 N0001 M03 S3000 G00 X22 Z0

N0002 G73 U6.000 W1 R6.000 N0003 G73 P04 Q7 U0.2 W0.2 F100 S3000 N0004 G00 X15.000 N0005 G01 Z-15.000 N0006 G01 X22.000 Z-25.000 N0007 G00 Z0.000

N0011 G70 P0004 Q0007 N0013 G00 X28 Z2 N0014 M30


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Exercise No. 5 Part Programme for milling Operation.

N010 G92 X0 Y0 Z50000 N020 G90

N030 M06 T1 N040 Z-30000 M03 S600 N050 G41 G01 X100000 Y-60000 F100

N060 X300000 N070 Y-260000

N080 X100000 N090 Y-60000 N100 G40 X0 Y0 N110 G00 Z50000 T0 M05 N120 M06 T02

N130 X200000 Y-120000 Z2000 S600 M03 N140 G01 Z-5000 F100 N150 G42 Y-100000 N160 G02 I0 J-60000 N170 G00 Z50000 M05

N180 G40 X0 Y0 T0 M02

Cad Cam Final Manual (1)

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