Computer Aided Engineering - Prabhakar

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    Name of the Student : PRABHAKAR.PStudent Registration No : BAB0911001

    Module Leader at MSRSAS : Mr. Monish Gowda

    PO

    STG

    RADUATE

    ENG

    INEERINGA

    NDM

    ANAG

    EM

    ENTPRO

    G

    RAM

    M

    E

    (PEM

    P)

    M.S.Ram aiah Sch oo l o f Advan ced S tud iesNew BEL Road, Gnanagangothri Campus, MSR Nagar, Bangalore-560 054

    Tel/Fax: 23605539/23601983; website: http://www.msrsas.org

    Centre Name:

    Mechanical and manufacturingEngineering Centre

    Course Name: M.Sc.[Engg] in Machinery Design

    FULL TIME 2011 BATCH

    ASSIGNMENT

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    Declaration Sheet

    Delegates Name PRABHAKAR.P

    Reg No BAB0911001

    Course MACHINERY DESIGN Batch FT2011

    Module Code AME501

    Module Title COMPUTER AIDED ENGINEERING

    Module Start Date 10-10-2011 Submission Date 05-11-2011

    Module Leader Mr. Monish Gowda

    Submission ArrangementsThis assignment must be submitted to Academic Records Office (ARO) by the submission date before 1730 hours

    for both Full-Time and Part-Time students.

    Extension requestsExtensions can only be granted by the Head of the Department / Course Manager. Extensions granted by any other

    person will not be accepted and hence the assignment will incur a penalty. A copy of the extension approval must be

    attached to the assignment submitted.

    Late submission PenaltiesUnless you have submitted proof of Mitigating Circumstances or have been granted an extension, the penalties for a

    late submission of an assignment shall be as follows:

    Up to one week late: Penalty of one grade (5 marks)

    One-Two weeks late: Penalty of two grades (10 marks)

    More than Two weeks late: Fail - 0% recorded (F2)All late assignments must be submitted to Academic Records Office (ARO). It is your responsibility to ensure that

    the receipt of a late assignment is recorded in the ARO. If an extension was agreed, the authorization should be

    submitted to ARO during the submission of assignment.

    To ensure assignments are written concisely, the length should be restricted a limit indicated in the assignment

    questions. Each participant is required to retain a copy of the assignment in his or her record in case of any loss.

    DeclarationThe assignment submitted herewith is a result of my own investigations and that I have conformed to the guidelines

    against plagiarism as laid out in the PEMP Student Handbook. All sections of the text and results, which have been

    obtained from other sources, are fully referenced. I understand that cheating and plagiarism constitute a breach of

    University regulations and will be dealt with accordingly.

    Signature of the

    DelegateDate

    Date stamp from

    ARO

    Signature of

    ARO Staff

    Signature of

    Module Leader

    Signature of

    Course Manager

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    TABLE OF CONTENTS

    _______________________________________________________________________

    Abstract 01

    Part -A1.0 Introduction 02

    1.1Advantages of using CAD/CAM for CNC programming 02

    1.1.1 Chances of error 02

    1.1.2 Setup time 03

    1.1.3 Modification of programme 03

    1.1.4 Error detection 03

    1.1.5 Effective use of machine and cutting tool 03

    1.2 Case study supporting CAD/CAM based programming 04

    1.3 Conclusion 04

    PART - B

    2.0 Swivel machine vise 05

    2.1 CATIA 05

    2.2 Generation of 3D model using CATIA 05

    2.2.1 Swivel base 05

    2.2.2 Fixed jaw 06

    2.2.3 Movable jaw 08

    2.2.4 Guides 10

    2.2.5 Jaw plates 11

    2.2.6 M10 Allen screw 12

    2.2.7 M12 Hexagonal bolt 132.2.8 Lead screw 13

    2.2.9 M16 T-bolt 14

    2.2.10 M16 T-nut 15

    2.3 Assembly of swivel vise 16

    2.4 Clash analysis 19

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    2.5 Constrain analysis 20

    2.6 Conclusion 21

    PART - C

    3.0 Surface modeling 22

    3.1 Surface modeling procedure of water scooter 22

    3.2 Rendering 26

    3.3 Connect checker 27

    3.4 Cutting plane analysis 28

    PART - D

    4.1 Comments on learning outcome. 29

    4.2 Conclusion 29

    5.0 References 30

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    LIST OF FIGURES_______________________________________________________________________

    Fig1.1 NC programme generated on punch tape[1] 02

    Fig 1.2 &Fig 1.3 showing axes present in 5 axes CNC machine 03

    Fig1.4 Forging die of bevel gear[2 ] 04

    Fig1.5 Showing tool path while machining[2 ] 04

    Fig2.1 Swivel machine vise base 06

    Fig2.2 Longitudinal section view 06

    Fig2.3 Lateral section view 06

    Fig2.4 Fixed jaw 07

    Fig2.5 Another view of Fixed jaw 08

    Fig2.6 cut section view of Fixed jaw 08

    Fig2.7 Movable jaw 09

    Fig2.8 Another view 10

    Fig2.9 Cut section view of movable jaw 10

    Fig 2.10 Guide 10

    Fig2.11 Showing guide in assembly 11

    Fig 2.12 Jaw plate 11

    Fig2.13 Showing Jaw plate in assembly 12

    Fig2.14 M10 Allen screw 12

    Fig2.15 M12 Hexagonal bolt 13

    Fig2.16 Lead screw 14

    Fig2.17 M16 T-bolt 15Fig2.18 M16 Hexagonal nut 15

    Fig2.19 Assembly of swivel vise 16

    Fig 2.20 Assembly sectional view of swivel vise 17

    Fig 2.21 showing the exploded view of swivel vise 17

    Fig2.22 Clash analysis report of Swivel vise 20

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    Fig2.23 showing constrains analysis report 21

    Fig3.1 Stage 1 Development of surface 22

    Fig3.2 Stage 2 Development of surface 23

    Fig3.3 Stage 3 Development of surface 23

    Fig3.4 Stage 4 Development of surface 23

    Fig3.5 Stage5 Development 23

    Fig3.6 Stage6 Development 24

    Fig3.7 Stage7 Development 24

    Fig3.8 Stage8 Development 24

    Fig3.9 Stage8 Development 24Fig3.10 Half completed model of water scooter 25

    Fig3.11 Fully completed model of water scooter 25

    Fig3.12 showing the rendered image of water scooter 26

    Fig3.13 showing the connectivity analysis of water scooter 27

    Fig3.14 showing the cutting plane analysis of water scooter 28

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    Nomenclature_______________________________________________________________________

    Acronyms

    CAD Computer aided designCAM Computer aided manufacturing

    CIM Computer integrated manufacturing

    RE Reverse engineering

    RP Rapid prototype

    NC Numerical control

    CNC computerized numerical control

    DNC Direct/Distributed numerical control

    PDM Product data management

    PLM Product life management

    GD&T Geometrical dimensioning and tolerance

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    Abstract

    The module computer aided engineering has briefly explains about how production

    operations are carried out in industries with the use of computer to meet the global challenge and to

    market any product globally the manufacturer will be focusing the following aspects to manufacture

    the product with good quality, the cost of the product should be very less, cycle time should be less

    and productivity and efficiency has to be raised to meet this aspects computer aided engineering is

    the solution. And the latest technologies in CAE like Reverse engineering and Rapid prototyping

    help the manufacturer to create the engineering data from existing products and to modify and

    introduce a new product in shorter lead time. The elements of Computer aided engineering are CAD

    (computer aided design), CAM (computer aided manufacturing), CIM (computer integratedmanufacturing), CAPP (computer aided process planning) etc, which supports the manufacture in

    different aspects to manufacture their product.

    The Part-A assignment is the debate about the CNC programmers now a days in industries the

    usage of conventional machines is with limited application due to various advantages industries

    switch over to either NC/CNC/DNC all these latest machines the relative movement of cutting tool

    and work piece are controlled by the data or codes called numerical control programme which can

    be generated either manually by finding out the co-ordinates or by means of the use of CAD/CAM

    software the debate is about the scope of NC manual programmers by the year 2020

    The Part-B assignment involves in creation of the assembly drawing of the swivel machine vise

    with the use of CAD software CATIA V5R18 it includes

    Creation of individual elements of the assembly in part work bench

    Assembled and various analysis has to be carried out in assembly work bench

    The Part-C assignment creating the surface on the wire frame water scooter which is provided

    in IGES format and various surface analysis and rendering of the image has to be carried out in

    CATIA V5R18.

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    PART-A DEBATE

    1.0 Introduction

    In present days industries calculate time is equal to money to compitate in business it is

    required to produce good quality products in the less cost this will be achieved by increased

    productivity CNC technology is been used widely in industries to increase productivity such as

    metal cutting machines- Milling, Turning, etc metal forming machines like bending forming

    machines metal molding machines like injection molding etc inspection CMM,LMM and so on the

    programming for this machines is done using CAD/CAM software. The development of NC come

    across the following stages.

    1) Stage1-NC machines programming is done by punch tape and fed into tape reader

    Fig1.1 NC programme generated on punch tape[1]

    2) Stage 2- CNC in this a small computer is fixed in machine itself by which the parameter

    changes can be edited in the computer present in machine.3) Stage 3- DNC programme is generated in mainframe computer and distributed to many

    number of CNC machines

    1.1Advantages of using CAD/CAM for CNC programming

    1.1.1 Chances of error

    In present days number of axis is been increased to make the machine more versatilefor 5

    axes machining centre the movement will be represented in CNC programme by ADDRESS

    CODES- X,Y,Z,A,C as x-longitudinal movement of table in X axis, Y-lateral movement of table in

    Y axis, Z-spindle movement towards and away from work piece in Z axis, A- Rotation of Table in X

    axis, C-Rotation of Spindle head along Z axis in manual programming it is difficult for the

    programmer to consider all these axes in the machines and programme the tool path but it is possible

    in CAD/CAM based programming

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    1.1.2 Setup time

    Setup time will be reduced in CAD/CAM based programming since the software itself

    provides Tool list, power graph etc which can also be used for documentation purpose where as in

    manual programming has to remember all the specification of various types of tools used for various

    operation

    1.1.3 Modification of programme

    When there is modification of profile modification of programme is very easy in CAD/CAM

    based programming that is by once again by editing the profile created for programme generation

    NC programme can be created for new profile but in case of manual programming identifying the

    block which has to be edited will take more time

    1.1.4 Error detection

    The process of simulation is available in CAD/CAM based programming through which the

    cutting tool movement while machining and the profile which we get after machining can be viewed

    so error in the programme is easily identified.

    1.1.5 Effective use of machine and cutting tool

    In case of CAD/CAM based programming the cutting tool and machine will be effectively

    used were the standard machining process is followed like wile giving depth of cut milling cutter

    will not be directly plunged on the work piece instead an entry helix is provided automatically

    through which cutter will move in angular path so load on cutter will be less which increases tool

    life where as in manual programming these parameters are not considered

    1.2 Case study supporting CAD/CAM based programming

    In modern days industries manufacture very complicated profiles in their products to create

    such complicated profiles complicated machines are required one of such development is 5-axes

    machining centre the common axes present in this are shown below

    Fig 1.2 [2] Fig 1.3[2]

    Fig 1.2 &Fig 1.3 showing axes present in 5 axes CNC machine

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    With the application of 5-axes machining centre very complicated profiles can be machined,

    while machining the axes movement can be individually or combination of all the axes any small

    error occurred in programming will be resulting in accidents which leads to spoilage of machine and

    work piece so only CAD/CAM based programming is suitable for this type of machine even if

    manual programming will not be effectively using the axes of the machine.

    Fig1.4 Forging die of bevel gear[2 ] Fig1.5 Showing tool path while machining[2 ]

    In Fig 1.4 profile of a complicated forging die of bevel gear which is been machined using

    CNC machines for machining such complicated profiles CAD/CAM based programming is the

    suitable method.

    In Fig 1.5 showing the tool path generated by CAD/CAM Software which will be the

    effective method for machining such profiles in reduced cycle time of machining with increased tool

    life and without any strain hardening generation in work piece but in manual programmingidentifying such tool path will be difficult.

    The other advantage in CAM based programming is creating programme for core and cavity

    is very easy using either any one of part say with core profile immediately the programme for cavity

    profile can be created it also suits for punch and die but in case of manual programming co-ordinates

    has to be find out separately and programming has to be done individually

    1.3 Conclusion

    By 2020 there will be the tremendous development in field of CNC machineries with

    various axes which is also required because most of the products gets modified day to day and also

    to satisfy the customer product is to be manufactured in very short lead time and also manual

    programming has only limited application. Instead of skill full programmers industries will choose

    CAD/CAM software

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    PART-B Geometric modeling of Swivel machine vise

    2.0 Swivel machine viseSwivel vise is generally used in workshop for clamping the work piece to perform various

    machining operation where it is required to machine various angle in work piece it usually consist of

    graduation in base which is rigidly fixed on the machine table above the base the fixed jaw is placed

    which has a reference line the required angle can be set by swiveling the movable jaw along the

    base.

    2.1 CATIA (Computer aided three dimensional interactive application)

    CATIA software works on ACIS kernel system and it covers all the function of

    CAE/CAD/CAM and provides advanced 3D PLM solutions for product development used in all

    major engineering industry like automobile, aircraft, plastic molding, sheet metal etc.

    2.2 Generation of 3D model using CATIA

    3D geometric model of the parts of swivel machine vise are created by constructive boundary

    method where initially sketcher work bench and part work bench is used to create the part model and

    assembly work bench is used to assemble all the parts and to analyze the clash and finally 2D

    drawings are directly obtained from 3D model in drafting work bench.

    2.2.1 Swivel base

    Swivel vise base is rigidly fixed on the machine table using T-bolts and nuts it has a

    projection at the bottom face which exactly fits to T-slot present in the machine table, It also

    contains a circular T-slot through which swivel base and movable jaw is clamped and also it has a

    circular projection in which movable jaw is aligned.

    Development stages of Swivel vise base in CATIA

    Initially outer sketch is created in Sketcher work bench

    Then in Part work bench its thickness is assigned using pad

    Again base sketch is created in sketcher work bench by using shaft it is revolved

    Using hole central hole is created

    Fillet and chamfer is created

    Circular T-slot is created using groove

    Material property is applied as Iron

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    Fig2.1 Swivel machine vise base

    Fig2.2 Longitudinal section view Fig2.3 Lateral section view

    2.2.2 Fixed jaw

    Fixed jaw is assembled above the swivel base it has a hole at center which gets fitted to base

    for alignment and two holes to get clamped with base and it has thread hole for lead screw and two

    threaded holes for clamping the jaw plate and guide ways which exactly guides the movable jaw

    when spindle is rotated.

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    Development stages of Fixed jaw in CATIA

    Initially outer sketch is created in Sketcher work bench

    Then using shaft the object is revolved

    Hole is created using hole

    Once again in sketch work bench base sketch is created above the object

    In part wok bench it is padded and mirrored

    Chamfered and filleted

    Guide holes for lead screw and thread holes for clamping jaw plates is created using hole

    operation

    Finally material property is applied as Iron

    Fig2.4 Fixed jaw

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    Fig2.5 Another view of Fixed jaw

    Fig2.6 cut section view of Fixed jaw2.2.3 Movable jaw

    Movable jaw is assembled above the fixed jaw it has a threaded hole where lead

    screw is assembled when lead screw is rotated it slides and moves on the guide ways present

    in fixed jaw and it has two threaded holes for clamping the jaw plates and it has four

    threaded holes for clamping the guides

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    Development stages of Fixed jaw in CATIA

    Initially outer sketch is created in Sketcher work bench

    Then in Part work bench its thickness is assigned using pad

    Fillet and chamfer is created

    Using pocket slot is created

    Threaded hole for lead screw assembly is created by hole

    Two threaded hole for jaw plate assembly is created by hole

    Four threaded hole for guides assembly is created by hole

    Finally material property is applied as Iron

    Fig2.7 Movable jaw

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    Fig2.8 Another view Fig2.9 Cut section view of movable jaw

    2.2.4 Guides

    Guides are the plate with two relief holes which is clamped with movable jaw using

    hexagonal bolt to arrest the z-axis degrees of freedom it moves along with the movable jaw on the

    guide ways present in fixed jaw.

    Development stages of Guides in CATIA

    Initially outer sketch is created in Sketcher work bench

    Then in Part work bench its thickness is assigned using pad

    Two holes are created using hole and mirror operation

    Fig 2.10 Guide

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    Fig2.11 Showing guide in assembly

    2.2.5 Jaw plates

    Jaw plates are fixed in both fixed and movable jaw

    Jaw plate will have two counter bore hole which has same co-ordinates as in fixed

    and movable jaw threaded holes

    Jaw plates are clamped with fixed and movable jaw using Allen screw

    Development stages of Jaw plates in CATIA

    Initially outer sketch is created in Sketcher work bench

    Then in Part work bench its thickness is assigned using pad

    Two Counter bore holes are created using hole and mirror operation

    Finally material property is applied as steel

    Fig 2.12 Jaw plate

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    Fig2.13 Showing Jaw plate in assembly

    2.2.6 M10 Allen screw

    M10 Allen screw is used to clamp the jaw plates along with fixed and movable jaws

    Development stages of Allen screw in CATIA

    Initially outer sketch is created in Sketcher work bench

    Then in Part work bench its thickness is assigned using pad

    Using thread operation M10 thread is applied

    Using pocket operation Hexagonal pocket is created

    Finally material property is applied as steel

    Fig2.14 M10 Allen screw

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    2.2.7 M12 Hexagonal bolt

    M12 hexagonal bolt is used to clamp the guides along with movable jaws

    Development stages of Hexagonal bolt in CATIA

    Initially outer sketch is created in Sketcher work bench

    Then in Part work bench its thickness is assigned using pad

    Using groove operation chamfer is created

    Using thread operation M12 thread is applied

    Finally material property is applied as steel

    Fig2.15 M12 Hexagonal bolt

    2.2.8 Lead screw

    Lead screw is a cylindrical threaded shaft were the rotary motion is converted into linear

    motion of movable jaw only the rotary constrain is provided in fixed jaw so translation motion is

    fully constrained.

    Development stages of Lead screw in CATIA

    Initially outer sketch is created in Sketcher work bench

    Using Shaft the object is revolved

    New plane is created and square is extruded using pad

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    Fillet and chamfer is created

    Thread is created using thread operation

    Finally material property is applied as steel

    Fig2.16 Lead screw

    2.2.9 M16 T-bolt

    M16 T-bolt is used to clamp the base with fixed jaw whenever angle is to be changed in vise

    this T-bolt nut has to be loosened after setting the angle T-bolt nut has to be tightened.

    Development stages of T- bolt in CATIA

    Initially outer sketch is created in Sketcher work bench

    Then in Part work bench its thickness is assigned using pad

    Using thread operation M16 thread is applied

    Finally material property is applied as steel

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    Fig2.17 M16 T-bolt

    2.2.10 M16 T-nut

    M16 Hexagonal nut is used to clamp the T-bolt and also used to clamp the lead screw

    Development stages of T- bolt in CATIA

    Initially outer sketch is created in Sketcher work bench

    Then in Part work bench its thickness is assigned using pad

    Using groove operation chamfer is created

    Using hole operation M16 thread is applied

    Finally material property is applied as steel

    Fig2.18 M16 Hexagonal nut

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    2.3 Assembly of swivel vise

    The two types of assembly procedure is followed while assembling the parts are

    Top down

    Bottom up

    In this bottom up procedure is followed for assembling the swivel vise where all the elements

    are stored as a separate part file which is been assembled one after one by starting from

    bottom most part to finishing the assembly with the top most part in the assembly

    Fig2.19 Assembly of swivel vise

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    Fig 2.20 Assembly sectional view of swivel vise

    Fig 2.21 showing the exploded view of swivel vise

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    Assembly Procedure followed while assembling swivel viseAfter completing all the elements in the part work bench in product feature

    assembly work bench has to be opened and following procedure is followed.

    Base

    Base is brought into assembly work bench by using existing component option Orientation is done by move option

    Fix constrain is applied to base

    T-Bolt assembled to base T-bolt is brought into assembly work bench by using existing component option

    Orientation is done by move option

    Contact faces constrain is applied between T- slot faces and T-bolt faces

    Angular constrain is applied to planes for positioning

    Fixed jaw assembled to Base and T-bolt Fixed jaw is brought into assembly work bench by using existing component option

    Orientation is done by move option

    By using coincidence constrain axis is aligned between base and T-bolt

    By using contact faces constrain fixed jaw is assembled to base and T-bolt

    Hexagonal nut assembled to T-bolt Hexagonal nut is brought into assembly work bench by using existing component

    option

    Orientation is done by move option

    By using coincidence constrain axis is aligned between nut and T-bolt

    By using contact faces constrain nut is assembled to fixed jaw and T-bolt

    Movable jaw assembled to fixed jaw Movable jaw is brought into assembly work bench by using existing component

    option

    Orientation is done by move option

    By using coincidence constrain axis is aligned between threaded holes present in the

    faces

    By using contact faces constrain movable jaw is assembled to fixed jaw

    By using offset constrain the gap between fixed and movable jaw is maintained

    Guides assembled to movable jaw Guides are brought into assembly work bench by using existing component option

    Orientation is done by move option

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    By using coincidence constrain axis is aligned between threaded holes present in the

    faces

    By using contact faces constrain guides are assembled to movable jaw

    Hexagonal bolts assembled to guides Hexagonal bolt are brought into assembly work bench by using existing component

    option

    Orientation is done by move option

    By using coincidence constrain axis is aligned between threaded holes present in the

    faces and hexagonal bolt

    By using contact faces constrain bolts are assembled to movable jaw

    Jaw plates assembled to fixed and movable jaw

    Jaw plates are brought into assembly work bench by using existing component option Orientation is done by move option

    By using coincidence constrain axis is aligned between threaded holes present in the

    faces and counter bore present in jaw plates

    By using contact faces constrain guides are assembled to movable jaw

    Lead screw assembled to fixed and movable jaw Lead screw are brought into assembly work bench by using existing component

    option

    Orientation is done by move option

    By using coincidence constrain axis is aligned between threaded holes present in the

    faces and axis of lead screw

    By using contact faces constrain lead screw is assembled

    Hexagonal nut assembled to lead screw Hexagonal nut is brought into assembly work bench by using existing component

    option

    Orientation is done by move option

    By using coincidence constrain axis is aligned between nut and lead screw

    By using contact faces constrain nut is assembled to fixed jaw and lead screw

    2.4 Clash analysis

    Clash analysis is done to check the clash, clearance and contact between the mating surface

    of the assembly this report is generated in assembly workbench based on the report if any clash is

    there means should be modified but for threaded mating parts the report will always shows as clash

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    which need not to be considered. The gives name of the product and name of the product which is

    assembled and type weather clash, contact or clearance in between mating surface and its related if

    exist in the below Fig ( ) the clash analyses report of swivel machine vise assembly is shown.

    Fig2.22 Clash analysis report of Swivel vise

    2.5 Constrain analysis

    Constrain analyses is performed in CATIA at assembly work bench this analysis is

    performed to identify weather any degree of freedom is there for the assembled elements if any

    freedom is there should be properly constrained. The Fig( ) shows constrain analysis report of

    swivel vise assembly were all the elements is been properly constrained.

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    Fig2.23 showing constrains analysis report

    2.6 Conclusion.

    The assignment Part-B helps to develop the Knowledge in CATIA V5 R18 in varies work

    benches like Sketcher work bench, Part work bench, Product work bench, Assembly workbench,

    Generative shape design work bench, DMU kinematics work bench and Drafting work bench aboveall work benches are used while completing the assignment.

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    PART-C Geometric modeling of Water scooter

    3.0 Surface modelingSurface modeling is the methods for creating the surface on wireframe geometry The

    thickness of surface created using this modeling method is negligible. The complicated profiles

    which cannot be defined by the primitive shapes like spheres, cylinders, cubes, blocks etc has to be

    created by surface modeling example the complex shape of automobiles, aircraft, ship structures etc,

    In CATIA we can create the surface models and rendering is done to visualize the product using

    Real time rendering. Material property is given to these models. Also we can use these models to

    manufacture the product. The main application surface modeling is also in Reverse engineering

    where cloud points are generated using laser scanning technique NURBS are fitted to cloud pointsthen surface is generated and finally NC programme is generated.

    3.1 Surface modeling procedure of water scooter

    Initially the wire frame model provided in IGES format is loaded into generative shapes

    design work bench

    Since the one half of the water scooter is symmetrical to other half the half portion of the

    image is hided

    Some discontinuous and extra lines are to be detected and deleted

    Using the operations like SWEEP, MULTI SECTION, FILL, BLEND etc the surface is

    created on the wireframe model of the water scooter

    Once the half portion is finished the remaining portion is created by mirroring

    Material property is applied to water scooter

    Real time rendering is done

    Fig3.1 Stage 1 Development of surface

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    In Fig 3.1 initial surfaces are created using the multi section operation where four

    lines or curves used to create the surfaces.

    Fig3.2 Stage 2 Development of surface

    Fig3.3 Stage 3 Development of surface

    The Fig 3.2 and Fig 3.3 are the next development stages were the surface for seat of

    the water scooter is created using multi section option

    Fig3.4 Stage 4 Development of surface Fig3.5 Stage5 Development

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    The fig 3.4 is created using Sweep operation where the profile with two guide curves

    are assigned with anchor points

    Fig3.6 Stage6 Development Fig3.7 Stage7 Development

    Fig3.8 Stage8 Development Fig3.9 Stage8 DevelopmentSimilarly for the development of surfaces in next stages Split are used to separate

    the curve at an intersecting point and multiple extract are used to extract many small curves together

    and options like Sweep, Fill are used

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    Fig3.10 Half completed model of water scooter

    The Fig 3.10 shows half completed water scooter which is ready for mirroring

    and create full water scooter.

    Fig3.11 Fully completed model of water scooter

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    The Fig 3.11 shows fully completed water scooter after mirroring and after

    hiding points lines and curves.

    3.2 Rendering

    After completing the surfaces of the water scooter rendering process is carried out to view

    the photo realistic image of the water scooter by taking the image to rendering environment and

    selecting the related background for the image and placing the image properly and rendering process

    is carried out the Fig 3.12 shows the view of rendered image.

    Fig3.12 showing the rendered image of water scooter

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    3.3 Connect checker

    The connect checker is the analysis method carried out in water scooter after

    completing to find out weather all the surfaces created is been connected properly without any gap

    between the surfaces the Fig 3.13 shows the report shows the report of connect checker analysis

    carried out on water scooter.

    Fig3.13 showing the connectivity analysis of water scooter

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    3.4 Cutting plane analysis

    The cutting plane analysis is done to check for the continuity in the created

    surfaces this analysis is done by creating the number of steps or segments on the surface the Fig 3.13

    shows the report of cutting plane analysis carried out on the water scooter

    Fig3.14 showing the cutting plane analysis of water scooter

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    PART - D

    4.1 Comments on learning outcome.The module has given inputs regarding recent developments in engineering

    industries like CAD/CAM/CIM/CAPP etc about how to interpret a technical drawing various

    projections available and difference between those projections and also about PDM, PLM and

    concurrent engineering which is very much required in an industry to be maintained and the recent

    developed technologies like Reverse engineering and Rapid prototypes techniques which helps to

    introduce a new product in a market in very short lead time and also the real concept of GD&T that

    is by providing GD&T to production drawing will actually increases the tolerance. The module also

    given the inputs regarding application of various CAD/CAM and CAE software based on its

    functions in engineering field. The lab secession has given a live demonstration on Reverseengineering and Rapid prototyping starting from cloud points generation using laser scanner to a

    realistic object creation using RP machine and also the lab session of CATIA was very useful varies

    work benches like Sketcher work bench, Part work bench, Product work bench, Assembly

    workbench, Generative shape design work bench, DMU kinematics work bench and Drafting was

    exposed during the module.

    4.2 ConclusionIn Part A in debate brief discussion about NC programme generation

    with the use of CAD/CAM software verses manual programming by the

    year of 2020.

    In Part B The assembly of swivel machine vise is generated using

    CATIA V5 R18 software various analysis is been done and presented

    In Part C The surfaces are created on the provided wireframe model of

    water scooter using CATIA V5 R18 software various analysis is been

    done and presented

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    References

    [Referring Web Published Article from which photographs are extracted]

    [1] Unknown Article, Punched Tape http://en.wikipedia.org/wiki/Punched_tapeRetrieved on 05-11-

    2011

    [2]MMT Article, http:/www.moldmaking technology.com/articles Retrieved on 02-11-2011

    [Referring Web Published Article]

    [3]Unknown Article, The latest NC programming automation technology for increasing

    part manufacturing efficiency, http:/www.siemens.com/nx Retrieved on 02-11-2011

    [4]Balic.j, Intelligent CADF/CAM systems for CNC programming http://maja.uni-

    mb.si/files/apem/APEM[5]Mr. Monish gowda, Computer Aided Engineering Module notes, M.S.Ramaiah School of Advanced

    Studies, Bangalore.