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CHAPTER 1
MARUTI SUZUKI INDIA LIMITED PROFILE
1.1Introduction
Maruti Suzuki is one of India's leading automobile manufacturers and the market leader in
the car segment, both in terms of volume of vehicles sold and revenue earned. The Indian
government held aninitial public offering of 25% of the company in June 2003. As of May
10, 2007,Govt. of India sold its complete share to Indian financial institutions. With this,
Govt. of India no longer has stake in Maruti Udyog.
Maruti Udyog Limited (MUL) was established in February 1981, though the actual
production commenced in 1983 with the Maruti 800, based on theSuzuki Altokei car which
at the time was the only modern car available in India, its' only competitors- the Hindustan
Ambassador andPremier Padmini were both around 25 years out of date at that point. Maruti
are sold in India and various several other countries, depending upon export orders. Cars
similar to Maruti (but not manufactured by Maruti Udyog) are sold by Suzuki and
manufactured inPakistan and otherSouth Asian countries.
The company annually exports more than 50,000 cars and has an extremely large domestic
market in India selling over 730,000 cars annually. Maruti 800, till 2004, was the India's
largest selling compact car ever since it was launched in 1983. More than a million units of
this car have been sold worldwide. Currently, Maruti Alto tops the sales charts and Maruti
Swift is the largest selling in A2 segment.
Due to the large number of Maruti 800s sold in the Indian market, the term "Maruti" is
commonly used to refer to this compact car model. Till recently the term "Maruti", in popular
Indian culture, was associated to the Maruti 800 model.
Its manufacturing facilities are located at two facilities Gurgaon and Manesar, south of New
Delhi. Marutis Gurgaon facility has an installed capacity of 350,000 units per annum. The
Manesar facilities, launched in February 2007 comprise a vehicle assembly plant with a
capacity of 100,000 units per year and a Diesel Engine plant with an annual capacity of
100,000 engines and transmissions. Manesar and Gurgaon facilities have a combined
capability to produce over 700,000 units annually.
http://en.wikipedia.org/wiki/Initial_public_offeringhttp://en.wikipedia.org/wiki/May_10http://en.wikipedia.org/wiki/May_10http://en.wikipedia.org/wiki/2007http://en.wikipedia.org/wiki/Suzuki_Altohttp://en.wikipedia.org/wiki/Kei_carhttp://en.wikipedia.org/wiki/Hindustan_Ambassadorhttp://en.wikipedia.org/wiki/Hindustan_Ambassadorhttp://en.wikipedia.org/wiki/Premier_Padminihttp://en.wikipedia.org/wiki/Pakistanhttp://en.wikipedia.org/wiki/South_Asiahttp://en.wikipedia.org/wiki/Maruti_800http://en.wikipedia.org/wiki/Maruti_Altohttp://en.wikipedia.org/wiki/Maruti_Altohttp://en.wikipedia.org/wiki/Maruti_800http://en.wikipedia.org/wiki/South_Asiahttp://en.wikipedia.org/wiki/Pakistanhttp://en.wikipedia.org/wiki/Premier_Padminihttp://en.wikipedia.org/wiki/Hindustan_Ambassadorhttp://en.wikipedia.org/wiki/Hindustan_Ambassadorhttp://en.wikipedia.org/wiki/Kei_carhttp://en.wikipedia.org/wiki/Suzuki_Altohttp://en.wikipedia.org/wiki/2007http://en.wikipedia.org/wiki/May_10http://en.wikipedia.org/wiki/May_10http://en.wikipedia.org/wiki/Initial_public_offering8/10/2019 Weld Information Collection System
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1.4 COMPANY MISSION
A leader in the Indian Automobile Industry.
Creating Customer Delight and Shareholders wealth.
A pride of India!
1.5 LEADERSHIP
By Market share and brand equity
By operational practices
By people strategy
1.6 CUSTOMER DELIGHT
Values for money
Quality
Service
1.7 SHARE HOLDERS WEALTH
High Profitability & Image
1.8 A PRIDE OF INDIA
As a corporate citizen
Products
People
Practices
Customers
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1.11 QUALITY TOOLS
5S
SEIRI PROPER SELECTION
SEITIONARRANGEMENT
SEISOCLEANING
SEIKETSOCLEANLINESS
SHITSUKEDISCIPLINE
4M
MAN
MACHINE
MATERIAL
METHODS
3M
MURIINCONVENIENCE
MUDAWASTAGE
MURAINCONSISTENCY
3G
GENCHIGO TO ACTUAL PLACE
GENBUTSU SEE THE ACTUAL THING
GENJITSUTAKE APPROPRIATE ACTION
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1.12 The hierarchy diagram of MSIL
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1.13DIVISIONS AND DEPARTMENTS
Corporate Services Division
Legal & Secretarial Department
Corporate Communication Cell
Protocol
Strategic Initiative Group
Recruitment & Management Compensation
Human Resource Division
Employee Relations Department
Establishment & Time Office
Factory Administration Department
Organizational Development Department
Production Engineering
Production Engineering Division
Production Service Division
Engineering Directorate
QAIN Division
Service Division
Service- 1-5
MSS(D)
Parts Inspection Division
Engineering Division
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Supply Chain division
Supply Chain- 1,2,3 Division
Shipping & transport Department
Imports Department
Consumables Department
Information Technology Division
Application Group1 (AG1)
Application Group2 (AG2)
Application Group3 (AG3)
Information Technology Strategies(ITS)
IT Operation and Services(ITOS)
Marketing & Sales Secretariat
Marketing Strategy & Development
Marketing
Sales
Exports
Web-IT, E-Commerce
Spare Parts Division
Spare Parts Procurement
Warehousing & Dispatch
Spare Parts Sales
Accessories
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Vigilance Division
Security Wing
Vigilance Wing
Finance Division
Budget, Cost & Accounts Department Income Accounting
Production Division of Maruti Suzuki India Limited
Production Division in Maruti Suzuki India Limited has been renamed as Production
Business Vertical (PBV) after inclusion of Projects, Production Engineering, Vehicle
Inspection & Supplier Quality Assurance divisions in it.
Major components of PBV
Press Shop and Blanking Line
Weld Shop (1,2 & 3)
Paint Shop (1,2,& 3)
Engine Assembly (1,2,& 3)
Assembly Shop (1,2,& 3)
Machine Shop (1,2,& 3)
MaterialsX (1,2,& 3)
Plant maintenance
KB Casting
KB Engine
KB Machine Shop Production facility at Manesar Plant
SQA (Supplier Quality Assurance)
Production Engineering & Projects
Vehicle Inspection (VI)
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1.14 LAYOUT OF PROCESS FLOW
Fig. 1.2- Process flow of Maruti Suzuki India Limited
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1.15 INTRODUCTION TO VARIOUS MODELS
PRODUCT RANGE
MODELS SPECIFICATIONS YEAR OF LAUNCH
MARUTI 800 (FIRST
MODEL)796CC, HATCHBACK DECEMBER 1983
OMNI 796CC, MUV NOVEMBER 1984
GYPSY 992CC, 4WD DECEMBER 1985
MARUTI 800 (MODIFIED) 796CC, HATCHBACK APRIL 1986
MARUTI 1000 996CC, SEDAN OCTOBER 1990
ZEN 996CC, HATCHBACK OCTOBER 1993
ESTEEM 1.3L LX 1296CC, SEDAN NOVEMBER 994
ESTEEM 1.3L VX 1296CC, SEDAN NOVEMBER1995
ESTEEM 1.3L AX 1296CC, SEDAN JUNE 1996
ZEN AX (AUTOMATIC) 996CC, HATCHBACK OCTOBER 1996
GYPSY KING 1296CC, 4WD NOVEMBER1996
OMNI (E) 796CC, MUV DECEMBER 1996
GYPSY (E) 1296CC, 4WD DECEMBER 1996
MARUTI 800 (NEW
MODEL)796CC, HATCHBACK SEPTEMBER 997
ESTEEM 98 1296CC, SEDAN OCTOBER 1997
NEWOMNI&OMNI-E 796CC, MUV FEBRUARY 1998
ZEN VX & ZEN VX
AUTOMATIC
996CC, HATCHBACK
JULY 1998
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ZEN D 1200CC, HATCHBACK AUGUST 1998
MARUTI 800 EX 796CC, HATCHBACK JANUARY 1999
ZEN LX 996CC, HATCHBACK JANUARY 1999
ZEN CLASSIC 996CC, HATCHBACK AUGUST 1999
ZEN VXI 996CC, HATCHBACK OCTOBER 1999
OMNI XL 796CC, MUV OCTOBER 1999
BALENO 1586CC, SEDAN DECEMBER 1999
WAGON R 1096CC, HATCHBACK JANUARY 2000
ALTURA1586CC, HATCHBACK
(BALENO)MARCH 2000
ALTO LX, LXI 796CC, HATCHBACK SEPTEMBER 000
VERSA 1296CC, MUV DECEMBER 2001
SWIFT 1296CC, HATCHBACK MAY 2005
ZEN ESTILO 1096CC, HATCHBACK DECEMBER 2006
SWIFT DIESEL 1296CC, HATCHBACK FEBRUARY 2007
SWIFT DIESEL FEBRUARY 2007
GRAND VITARA MARCH 2007
SX4 1.600CC MAY 2007
SWIFT DZIRE MARCH 2008
A- STAR NOVEMBER 2008
RITZ MAY 2009
STINGRAY OCTOBER 2013
CELLARIO MARCH 2014
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1.16 MILESTONES
1981
Maruti Udyog Ltd. was incorporated.
1982 Stepped into a JV with SMC of Japan.
1983 Maruti 800, a 796 cc hatchback, India's first affordable car was
produced.
1984 Installed capacity reached 40,000 units. Omni, a 796 cc MUV
was in production.
1985 Launch of Maruti Gypsy (970cc, 4WD off-road vehicle).
1986 Produced 100,000 vehicles (cumulative production).
1987 Exported first lot of 500 cars to Hungary.
1988 Installed capacity increased to 100,000 units.
1992 SMC increases its stake to 50 per cent.
1994 Produced the 1 millionth vehicle since the commencement of
production.
1995 Second plant launched, the installed capacity reached 200,000
units.
1996 Launch of 24-hour emergency on-road vehicle service.
1997 Produced the 2 millionth vehicle since the commencement of
production.
1998 Launch of website as part of CRM initiatives.
1999
Launch of Maruti - Suzuki innovative traffic beat in Delhi and
Chennai as social initiatives.
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2000 IDTR (Institute of Driving Training and Research) launched
jointly with Delhi government to promote safe driving habits.
2001 Launch of customer information centres in Hyderabad,
Bangalore, and Chennai.
2002
SMC increases its stake to 54.2 per cent.
Launch of Maruti Finance with 10 finance companies in Mumbai.
Start of Maruti True value in Mumbai.
2003
Production of 4 millionth vehicle.
Listed on BSE and NSE after a public issue oversubscribed 10 times.
2004
Maruti closed the financial year 2003-04 with an annual sale of
472122 units, the highest ever since the company began
operations 20 years ago.
2005. The fiftieth lakh car rolls out in April, 2005.
2006. Maruti tops jd power csi survey for record seventh time in a row
2007
Govt of India awarded O SUZUKI with coveted padma bhusan
Board of directors give approval to new name MUL to become
maruti Suzuki India limited.
2008.
M-800 crosses 25 lakh mark
MSIL celebrates SILVER JUBILEE
MSIL launches national road safety program.
2009
Capacity to manufacture expanded from 800,000 to a million
units(Gurgaon plus Manesar) annually
All India engineering export promotion council (EEPC) award.
MSIL achieved highest sales ever in Dec2009
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CHAPTER 2
MANUFACTURING PROCESS AT M.S.I.L.
2.1 Blank
Coils are fed to blanking line & continuous supply of sheet to cutting dies result in
shaping of coils to plan blanks.
Blanks are cut by stamping or shearing process & are stacked one by one to form
large mass of blanks
These stacks of blanks are further sent to press machines for forming into shape of
body panels
Fig. 2.1 Stack of blanks
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Panel
Blanks are supplied to press lines for pressing. Blanks are converted to body panels by
this process. Panels are stored in pallets which are supplied to Weld Shops for making
White Bodies.
FIG. 2.2- Panel
Panels re
stacked in
pallet
trolleys
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2.2 PRESS SHOP
The press shop can be regarded as the starting point of the car manufacturing process.
Centrally located between weld 1, weld 2 and weld 3 supplies components to all the three
plants. The press shop has a batch production system whereas the plants have a line
production system. The press shop maintains an inventory of at least two days. The weld
shop as per the requirements picks the finished body parts from the press shop. These may be
divided as A, B and C. A components are large outer components as forexample roof, door
panels etc. These components are manufactured in the press shop at Maruti due to design
secrecy and huge investment requirements. B and C components are manufactured by
joint ventures or bought from vendors.
2.2.1 Press Shop activity
1. Currently Press Shop is producing sheet metal components for 8 running models of Maruti
Suzuki and one model of GM India - Tavera
Fig. 2.3. Press shop activities
2. The Blanking and stamping shop processes 10000 metric ton of steel / month i.e. 400 tons
a day
SStteeeellccooiill BBllaannkk PPaanneell
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2.2.2 Machine Used
Five Transfer Press (4000 ton , 3500 ton , 2400 ton -1 2000 ton -2, in terms of total
capacity i.e. (draw+trim+pierce+bend+restrike) &1 Tandem line(1500 ton draw capacity)
Two Coil processing lines (ROSLShear line & Blanking line) SPM of 60
Capacity of 55,000 strokes / day from 400 tons of steel coils
Fig. 2.4. Press machine
2.2.3 SMED: Single Minute Exchange of Dies new concept being adopted . This concept
helps in changing of die set up within single digit minute (below 9 minutes). This helps us in
improving machine utilization & operating efficiency. Since press machines are very high
cost investment & any idle time lost due to die exchange will be a cost to company.
4000 Ton
transferpress
Pressed panels
come out from
this side
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Upper die
Fig. 2.5. SMED
2.2.4 Yieldimprovement:-(Ratio of output panel to input coil in weight) is Best amongst the
SMC group Companies. ( Presently at 63.2% )
Modifications to improve yield are continuously done & till Oct-09 Press Shop has saved Rs.
7.786 millions of material in current year
Lower die
46.2
56.94
50.12
105
29.6
13.0 21
.0
77.86
0
20
40
60
80
100
120
Apr 09 May 09 Jun 09 Jul 09 Aug 09 Sep 09 Oct 09 Nov 09 Dec 09 Jan 10 Feb 10 Mar 10 Target
(09-10)
LACS
Yield Improvement
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Yield is improved by
1. Reducing the blank size
2. Utilization of scrap for making smaller sheet metal parts.
2.3 WELD SHOP
The body panels produced in the press shop and the other small components are joined here
to give the white body or shell. In a typical car body 1400 different components are
welded together. The weld shops have the following facilities.
Welding jigs
Spot welding guns
Kawasaki welding robots
Hemming machines
Punching machines
PROCESS OUTLINE:The shop has different lines for different models, each of, which isfurther divided into three parts:
UNDER BODY:Here different underbody panels are welded together. These comprise of
rear underbody, central underbody, and front engine room panel. These underbodies are put
on the conveyor and welded together to give the underbody.
MAIN BODY: As the body moves on, the conveyor roof and side body panels (prepared on
the sub lines) are welded to it to give the main body. The chassis number is punched on the
cowl top and it is welded to the front engine room panel.
WHITE BODY:The doors, hood and back door are attached on the main body with the help
of bolts and screws to make it a white body. The body is checked for dent, burr and spatter
and these defects are repaired. After inspection and repairs the body is called WBOK. It is
sent to the paint shop thereafter.
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2.4.1 PRE TREATMENT
Before sending vehicle to painting process pretreatment is done to check the quality of
paint.
Fig. 2.6. Pre- treatment procedure
2.4.2 ED PAINTING
ED is electro deposition. Vehicle is dipped in the ED solution. In this around 300V is passed
to make paint to be attached. ED is 17% of paint rest is water and some additives (EDD, M).
PROCESS
The whole solution of ED acts as electrolytic solution. Vehicle before coming to ED dip, it
undergoes pre treatment. In that phosphating is done, in which Zn phosphate is made to
attach vehicle body which help in electro deposition, in this, vehicle acts as cathode and paint
as positive ions. When current is passed paint will be attracted by vehicle till its thickness
will be covered. ED is very accurate to apply. This is about whole process. Rinsing is done
Hot water rinse Spray degreasing Dip de
WR I
WR VIWR VWR IV
WR III WR IISURFACE CONTROL
PHOSPHATING WR VII
DI WATER MISTED PROCESS
WBS
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after to remove excessive color. In rinsing industrial water is used which will not be left go
waste. That will be filtered and used again.
Fig. 2.7. ED Coating procedure
2.4.3 ULTRA FILTRATION
Ultra filtration is the process in which all the rinse pipes and dip tanks will be filtered and
cleaned, by this way water is recycled. Here Osmosis process is used to filter water.
2.4.4 IC painting
IC is intermediate coating in which 3 colors are used. They are white, blue and red. Outside
portion of vehicle is painted by robots and inside is done manually. Paint thickness is taken
care, after that vehicle is sent to IC oven. Oven temperature is 198+/-5C.
2.4.5 TOP COAT Painting
Top coating is done after checking in Dry sanding II. There are 2 sub coatings Base coat and
Clear coat. Here 11 colors are used; 8 metallic and 3 solid. Only metallic colors are coated
with clear coating. Here also outside portion of vehicle is painted by robots and inside is done
manually.
Next vehicle will move to final inspection and will be sent to assembly.
ED DIPWR I WR II
WR IV WR III RINSING BY DIPPING
OVENWR V DI WATER
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DRY SANDING
Following repairs are done:
1. Roof sanding
2. Side repair if any.
Following checking is done:
1. Dosing mark
2. Sanding mark
SOL SEALING LINE
Sealer appearance is given the preference.
3 types of guns are used.
1. Pencil gun
2. Flat gun
3. Blind gun
4. Moti gun
In this line followings are checked;
1. Powder dust
2. Extra sealer
3. Extra sealer
4. Pin hole in lamp area
5. Sealer appearance
2.5 ASSEMBLY SHOP
In the assembly shop the body is loaded on an overhead conveyor. As the conveyor moves
the body, fitments are made at various stations. There are three Assembly Shops named
ASSY-1, ASSY-2 and ASSY-3. Plant 2 and Plant 3 have similar setup but in Plant-1 there are
separate assembly lines for separate models. The assembly shop has a continuous production
system. The assembly line can be subdivided into the followings: -
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(a) Trim line
The vehicle proceeds through a series of Trim workstations where team members begin by
installing weather stripping, moldings and pads. Then they put in wiring, vents and lights.
After an instrument panel, windows, steering column and bumper supports are added, it starts
to look less like a shell and more like a car.
(b)Chassis Line
This is where many safety-related items are installed. Things like brake lines, torque, gas
tanks and power steering are double-checked. The engine is installed, along with the starter
and alternator. Then come suspension and exhaust systems. Then wheel is mounted with the
help of wheel nut fastening machine.
(c) Final Line
From there the vehicle enters Final 1, which covers many interior items such as the console,
seats, carpet, glove box and steering wheel. This is also where bumpers, tires and the battery
are added, as well as finishing touches like covers and vents. Then, Coolant, Brake oil, Power
steering oil are filled and also the A/C gas are charged.
Features
Different assembly shop layouts are followed to reduce material handling operations & to
facilitate material flow between workstations.
a) Straight-line layout Car & omni line (Assy shop-1): Simplest layout in which
material enters at 1 end & leaves at the other end.
b) U shape layout Assy shop 2 & 3: Receiving & shipping ends of line are at same
end of plant, due to material handling considerations (same forklift for both needs) or
external needs.
c) S shape layout Esteem line (AS-1): Serpentine layout to fit longer assy line in
square shop.
Separate door Assy line: - Doors are taken out from the vehicle at the first station of the trim
line. Doors fitted in the final line make working easier.
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2.6 OTHER SHOPS/DEPARTMENTS
MACHINE SHOP
The machine shop is the source of all major components for the engine assembly shop. The
un-machined crankshaft and camshaft forgings, transmission case cylinder head and cylinder
block castings are brought in the form of raw materials from the vendors. The cylinder heads
and transmission case are aluminum castings while crankshaft and camshaft are steel
forgings.
It has the following lines:
(a) Transmission case line
(b) Cylinder head line
(c) Cylinder block line
(d) Crankshaft line
(e) Camshaft line.
ENGINE ASSEMBLY
There are four types of engines which are assembled in the Engine Plant
1. FC EngineEngine with cast iron block
a. M-800
b. Omni
c. Altod. Wagon-R
e. Zen Estillo
2. Aluminium EngineEngine with aluminium block
a. Gypsy
b. SX4
c. Swift (Petrol)
d. Dezire (Petrol)
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3. KB Engine (New series of engines with aluminium block)
a. A-Star
b. Ritz
4. Diesel Engine
a. Swift (Diesel)
b. Dezire (Diesel)
c. Ritz (Diesel)
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3.3 NG Welding Flow
NG welding flow occurs at a point where the robot is not able to weld the spot correctly i.e.
the weld does not took properly due to following reasons:-
a) Spatter control
b) Spot Miss
c) Gun alignment NG
d) Tip / Tip Dressing NG
e) Half spot
f) Spot out of position
g) Gun shunting
h) Part deformation (part mismatch)
3.4 W.I.C.S. FUNCTIONALITY
Prevents NG Welding Flow
Accurate Detection of Faults
a) Spatter control
b) Spot Miss
c) Gun alignment NG
d) Tip / Tip Dressing NG
e) Half spot
f) Spot out of position
g) Gun shunting
h) Part deformation (part mismatch)
Analysis of every weld spot
Storage of weld spot parameters (upto 10 years)
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3.5 SYSTEM CONFIGURATION
Fig. 3.1. System configuration of W.I.CS.
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3.6 W.I.C.S. METHODOLOGY
The methodology on which W.I.C.S. depends is to study about the resistance waves as the
reason for the spot failure could be known by this methodology.
RESISTANCE WAVES
Resistance waves are the graphical representation between resistance values and the weld
time to show that the nugget formed is absolutely correct.
Fig. 3.2. Principle of Resistance Waves
As we can see from the above figure 3.2, the resistance value first decreases but as the temp.
of base metal is raised the resistance value climb up and form a nugget and as the nugget
expansion takes place with the increase in electrical path, the resistance value again decline.
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From the above fig. 3.3, we can clearly see that the nugget formation takes place at any other
position than required.
2. Fault due to bend parts.
Fig. 3.4. Fault seen due to bend parts
From the above fig. 3.4, we can clearly see that the nugget formation does not took place
correctly as the parts in which the spot was to be applied was bent.
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3. Fault due to get out of position.
Fig. 3.5. Fault due to get out of position seen
From the above fig. 3.5, we can clearly see that the nugget formation was formed slightly
side from its position due to which spot was not formed as required.
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-Timers output E85, when weldpoints more than thresholds of a warning level occurred
frequently in res. decrease width or aver. res.
-Reset possible in reset box
E80 High Resistance
Faults occur due to dust between the tip, power cable break etc.
Fig. 3.7. Fault of E80 high resistance waves
-Timers output E80 when it detect resistance value ahead of a threshold of high resistance
and it doesnt send weld current according to the setting value.
-Discontinue the power supply at the detection of the fault
- Measures are the basically same as low current fault.
- We can reset the fault at a reset box, but it occurs again till the fault state is removed
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GRAPHICAL REPRESENTATION OF RESISTANCE WAVES
Fig. 3.8, shows the graphical representation of resistance values at the time of welding.
Fig. 3.8. Graphical representation of resistance values
This representation shows us the difference in the resistance decreasing width. This is shown
by the line arrays of red, yellow and blue colour in above fig.
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3.6.4 METHOD FOR OBSERVING RESISTANCE WAVEFORM
To measure the transition of resistance value in every 0.5 cycle in welding, we have to
calculate the parameter 1 to 4 and supervise them. The parameter to be calculated are as
follows:-
1. Resistance width decrease: - Max. resistance valuefinal resistance value
2. Average resistance value:- Average of resistance value between 2.5cyc and weld time
(setting time) -0.5cyc
3. 3.Max resistance value:- Max value between setting time and weld time (setting time)
-1.5cyc
4. Final resistance value:- Resistance Value of weld time (setting time) -0.5cyc
Fig. 3.9 Resistance waveform
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3.6.5 SETTING OF RESISTANCE LIMIT
Resistance limits refers us to a position after which alarm would rang. Resistance limits are
classified in two levels: -
1. Alarm Level: - When the nugget formation does not take properly, limit of alarm level
is reached and the alarm rang so that the worker or engineer could take the counter
measure.
2. Fault level: - When the engineer or worker does not take counter measure after the
alarm, then the line would automatically spot.
3.6.6 PROBLEMS OCCURING IN OBSERVATION
There is a case when there is not a change of resistance. In this case, only the thin
sheet side is weld NG on sheet combination such as thin- thick-thick sheets and in the
case of sheet combination of thin-thin sheets. Therefore, there is the case that NG
points cannot stop.
Whether fault stops or not depend on a limit setting. Misjudgment occur a lot of times,
when limit setting is too rigorous. But it cannot detect weld NG, when limit setting is too
indulgent.
Now, we set limits from average and unevenness of the present data which WICS systemcollect.
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3.7 SYSTEM SUMMARY
It gives the whole functioning of W.I.C.S.
Fig. 3.10. System Summmary
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3.7 FORMAT
Fig. 3.11. Format of W.I.C.S.
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3.9 DATA REFERENCE MENU
Collection serverData reference destination of the body which does not pass M/B as of
5:00 before three days.
Offer serverData reference destination of the body which passed a M/B as of 5:00 before
three days.
Wave form of one weld ID:
-It displays wave form of resistance and current value of optional weld point on same graph.
-When I search it by a robot and a body unit, I use it
Fig. 3.12. DATA REFERNCE MENU VERSION
Wave form of each weld ID and transition:
-It displays a wave pattern of resistance value or current value of a optional weld ID on the
same graph.
-It displays transition such as resistance decrease width, an average resistance value in a
designated period for a optional weld ID.
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Judgment of all weld ID
It displays a judgment (OK, NG, dust) for weld ID of a optional body with a table.
Specified weld ID wave form monitor:
-It is always (It update it by a period for about 50 seconds) displayed the latest wave pattern
of a optional model and weld ID.
3.10 CONCLUSIONS OF W.I.C.S.
1. Customer Satisfaction: - The main motive of implementing W.I.C.S. in the YL8 line is to
provide satisfaction to the customer. As the satisfaction of customer would increase, he/
she would increase their faith on the company as a result more customers would come to
buy the car.
2. Best Quality:- the implementation of W.I.C.S. increases the quality of the car as a result
the people would be assure that this company cannot make bad products as they are
perfect in their quality.
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CHAPTER 4
WELD SPOT CHECKING PROCESS STANDARDIZATION
4.1 Maruti Operation Standard Inspection
MOS I is known as Maruti Operation Standard Inspection sheet in which a list of all the spots
are made and their robots are mentioned which apply these spots. Cycles are divided
according to the application of spots. This sheet has a full spot detail of a car and the copy of
every sheet is listed in the file on the line so that any engineer could go on the line and with
this sheet could know about the inspection of this spot. The sheet is divided according to
main body, main body pit, white body, cowl box, etc. and their cycles.
4.2 DESCRIPTION OF MOS I
The first thing that an engineer should know in welding department is the layout of
department.
He should know that which robot is working on which car.
He should know which spots can be checked and which cannot be checked.
He should know how many men are needed for checking the spots in a given
component.
For this, MOS I has been made so that the engineer have a list of all the spots being
implemented on the components of the car.
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4.3 OBJECTIVES OF MOS I
1. To mark the spots with different colours of different robots working on the
component.
2. To mark the G.A. spots and Maru - A spots of the component.
3. To mark the cycle so that we could know how many men are needed for checking the
spots? No. of cycles is equal to no. of men needed to check the spots.
4. To know how many robots are doing welding in a given component and how manyspots are there in the given component.
4.4 METHODOLOGY ADOPTED
A MOS I sheet was made in which the picture of component with the spots was
printed.
The robots which are applying those spots in a given component were noted down
along with their spots.
Maru- A spots and G.A. spots were seen and marked on it.
The men working on a given component to check the spots were noted and cycles
were made according to their work.
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4.5CONCLUSIONS
Easy for engineer to find the robot.
Easy to find out the component details with the help of index.
To know how much labour required for checking the spots.