Study on Fixture

5/20/2018 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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Study on Fixture

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