Study on Fixture

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Study on fixture...JBM AUTO INDUSTRY LTD

Transcript of Study on Fixture

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    Study on fixtures

    Internal guide

    Mr. Rahul Sindhwani

    Industrial guide

    Mr.Satvir Singh

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    ABOUT THE ORGANIZASATION

    Neel Metal Products Limited is a company that manufactures

    more than 75% parts of the Maruti Suzuki India Limited. It is a

    part of the Jay Bharat Maruti Group.

    It has 32 plants located at various locations within India.

    It supplies fixtures for the companies like Renault, Honda,

    Ford, Maruthi ..

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    About the plant

    I had done my internship in Neel 4 plant, Which is for the

    fixtures design and manufacturing department.

    The procedure carried out in the Neel-4 Department is as

    follows:

    1.Marketing

    2.Projects

    3.Design

    4.Manufacturing

    5.Quality( CMM)6.Assembly

    7.Automation

    8.Trial

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    Introduction

    Nowadays many companies are using fixtures for

    manufacturing their products. It helps to maintain an

    automation in the manufacturing processes. It reduces the

    error chances that may arise when done by human effort

    because of high accuracy with automation. In this internship i

    learn basic designing of fixtures, different manufacturing

    techniques used, assembling the different parts installed to

    make a complete fixture. I would also learn to check the

    quality of fixtures

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    Basically two types of fixtures are produced in

    the plant:

    Welding Fixture

    Checking Fixture

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    Different parts in a fixture

    Fixture is made of three assemblies:

    1.Base Assembly

    2.Locating Assembly

    3.PY Assembly

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    Base assembly

    Base assembly mainly consists of

    1.Eye bolt

    2.Pneumatic stand3.Base frame

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    Parts of a locating assembly

    1.cylinder2.Clamp bracket( casted)

    3.Washer

    4.Collarless bush

    5.Locator( female)6.Locator( male)

    7.Hinge pin

    8.PCPNA- works detection unit

    9.Clamp plate

    10.clamp arm11.resting mylor

    12.pin

    13.adaptor

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    Parts of PY assembly

    1.PCPNA

    2.Adaptor

    3.Pin4.Riser

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    Designing of fixtures

    Designing of fixtures is done by using solid works , catia

    software's

    Designing department receives drawings from R&D

    department they will design all the parts separately and

    assemble them together

    When they are designing they consult manufacturing

    department also whether manufacturing is possible or not, if

    not they will alter the design

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    Manufacturing

    Two types of materials are used in manufacturing of fixtures

    1.Mild steel

    2.En material

    Manufacturing done in two places shop floor, manufacturing

    plant. Material movement is semi automatic they are usinghydraulic grainer use magnetic holder

    Initially raw material goes to welding cutting in weldingcutting it uses acetylene and oxygen gas uses co2 for burning

    and cuts the basic size of a part. After that it goes to profile cutting machine and their it cuts

    the profile shape and after that it will be cut for the profilerequired

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    They use CNC to make multiple holes or operations insmall time .Here we can give both manual andcomputer input.CNC is of 3 axis

    After that it will be sent to the machine shop. Inmachine shop we can find lathe, miller, shaper, drillingmachines where the final parts are made

    After final parts are made are sent for assembly

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    Assembling Finished parts from manufacturing are sent to the

    assembly. Different parts are assembled manually or

    by using robots they are assembled according to the

    order

    In the next slide mentioned different parts we willassemble them by using fasteners in proper

    sequence

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    Quality For checking accuracy of a fixture we are

    using coordinate measuring machine. Inthis we can check manually or by usingcomputer .in this we can measureaccuracy up to 0.05 mm. Master gaugeused to measure the stylus or probe .weuse cppdmis software to check accuracyof a fixture .In this we will give input in

    cad file format. If stylus diameterincreases accuracy decreases.cmm is of 3axis in this they will take machinecoordinate system and part coordinatesystem

    In these fixtures also for every 10 parts 1part was measured and if it was accurate

    they believe all the parts accurate theyuse probe or stylus to check accuracy

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    In cppsdmis software it shows all the readings

    and they check the accuracy

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    conclusion

    In this internship i had learned basic designing of fixtures,

    different manufacturing techniques used, assembling the

    different parts installed to make a complete fixture. I also had

    learned how to check the quality of fixtures by using cmm

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    Any questions

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