The document provides a 3-page internship report summarizing Nasit Malay Ramesh's 28-day internship at Jyoti CNC Automation Pvt. Ltd. The report details Jyoti CNC's manufacturing processes for CNC machines, including casting, machining, assembly, and quality control testing. It also describes the various components that make up CNC machines and the different departments within Jyoti CNC involved in production.

1. JYOTI CNC AUTOMATION PVT LTD
INTERNSHIP REPORT
ON
CNC MANUFACTURING
AT
BY
NASIT MALAY RAMESH
12BME0529
School of Mechanical & Building Sciences
15th
October, 2014

2. I | P a g e
ABSTRACT
The internship at Jyoti CNC Automation Pvt. Ltd., Rajkot emphasizes on a production of all the
components of CNC by casting process, their surface finishing by machining process and finally
the assembly of all the CNC components and their testing through various quality process.
Detailed explanation of the manufacturing, assembly and testing of CNC Machines of various
capacities have been mentioned in the report. It is in reference to the 28 days in-plant training
done in the foundry shop, machining shop, paint shop and assembly line area of the company.
The whole focus of the training involves basic manufacturing processes like casting, machining
(turning, drilling, milling, grinding), sheet metal bending, cutting, various quality control
techniques that are used in research and development of Computer Numerical Control machines.

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ACKNOWLEDGEMENTS
It is one of the most difficult tasks in life to choose the appropriate words to express one’s
gratitude towards the beneficiaries. I take this opportunity to express my gratitude and
appreciation to all those who directly or indirectly motivated and encouraged me during the
course of the internship.
This internship has had the help and support of several people whose time and expertise has
facilitated us in the successful completion of our internship. We wish to thank all of them for
their contributions.
I am very thankful to Mr. Vincent Dabhi for granting my industrial training in Jyoti CNC
Automation PVT Ltd. and supporting me throughout my training.
Last but not the least I am very thankful to the company and the entire department Heads for
their constant guidance. I feel very proud of being trainee of such a company.

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TABLE OF CONTENTS
S. No. DESCRIPTION Pg. No.
1. INTRODUCTION 1
1.1 COMPANY PROFILE 1
1.2 MISSION AND VISION OF THE COMPANY 2
1.3 AWARDS 2
2. CNC WORK THEORY 3
3. COMPANY PRODUCTS 4
3.1 TURNING/TURN MILL CENTERS (TMC) 4
3.2 VERTICAL MACHINING CENTERS (VMC) 4
3.3 HORIZONTAL MACHINING CENTERS (HMC) 6
4. COMPONENTS OF CNC 7
4.1 SPINDLE 7
4.2 SADDLE 7
4.3 BASE 7
4.4 LINEAR MOTION GUIDE WAYS (LM) 7
4.5 PALLET 8
4.6 AUTOMATIC TOOL CHANGER 8
4.7 HEAD STOCK 9
4.8 TAIL STOCK 9
4.9 TURRET ASSEMBLY 10
4.10 CONTROLLER 10
4.11 PUMPS 10
4.12 MOTORS 10
4.13 OUTER SHEET METAL BODY 10
5. ASSEMBLY OF CNC MACHINE 11
6. DIFFERENT TESTS AND QUALITY CONTROL 14
6.1 AUTO COLLIMATOR 14
6.2 LASER INTERFEROMETRY TEST 14
6.3 RENISHAW BALL BAR SYSTEM 14
6.4 CNC COORDINATE MEASURING MACHINE (CMM) 15
7. CASTING 16
7.1 CASTING PROCESS 16
7.2 CASTING DEFECTS 18

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8. VARIOUS DEPARTMENTS 19
8.1 R & D CENTER 19
8.2 GRINDING SHOP 19
8.2.1 HARDINGE KELLENBERGER 19
8.2.2 STUDER – KORBER SCHLEIFRING 19
8.2.3 ELB - SCHLIFF 20
8.2.4 VG 400 20
8.2.5 HINDUSTAN MACHINE TOOL 20
8.2.6 VRG 60 20
8.3 SHEET METAL SHOP 20
8.4 PAINT SHOP 21
8.4.1 DIVISIONS 21
8.5 QUALITY ASSURANCE 22
9. CONCLUSION 23
REFERENCES 24

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LIST OF FIGURES
Figure
No.
Figure Name Page No
1. Jyoti CNC Automation Pvt. Ltd. 1
2. TMC 160 4
3. VMC 1260 4
4. General sketch of CNC 6
5. General block diagram of 3 axis CNC machine 6
6. Saddle 7
7. Linear Motion Guide Ways (L.M) 8
8. Pallet 8
9. Automatic Tool Changer (ATC) 9
10. Head stock 9
11. Tail stock 9
12. Turret assembly 10
13. 3-Point leveling 11
14. Chuck 12
15. Dx-200 13
16. Dx-250 13
17. Autocollimator test 14
18. Renishaw ball bar test 15
19. CMM test 15
20. Casting area 16
21. Clamping the molds 17
22. Heavy Cast and Shot Peening Machine 17
23. Holding Furnace and Shot peening balls 18
24. Sheet Metal shop 20
25. Spray coating and sheet metal drying shop 21
26. Water rinse tank 22

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1. INTRODUCTION
1.1 COMPANY PROFILE
Jyoti CNC Automation Pvt. Ltd. is a CNC manufacturing company which was established by
Mr. P.G. Jadeja and Mr. S.L. Jadeja, 1989. Driven by a vision to build the company “A
Temple of Technology” through teamwork, the company has grown manifold from
manufacturing gear boxes for machines to developing precision all-geared head lathe
machines. Later on Jyoti started manufacturing highly sophisticated CNC machines in the
presence of manufacturers.
Jyoti was the first company to manufacture CNC machines in Gujarat. It was not an end,
there are many firsts attached with Jyoti since then. Jyoti, driven by technology and
innovation, keeps including new firepower in its arsenal by introducing machines like CNC
Turning Centers, Vertical Machining Centers, Oval Turning Center, Horizontal Milling
Machines and first Indian machines like VMC 40/70 Linear with innovative Linear
technology.
Jyoti has good trajectory of growth rate. Export penetration and inclination has helped them
to establish goodwill among the foreign buyers and distributors. Company's expanding
footprint ensures its global presence with export operations in countries like Italy, Russia,
Poland, Argentina, Brazil and rest of South America, Tanzania and some African countries,
Middle East and Other Asian Countries like Malaysia.
The company provides solution in Aerospace, Automobile, Agriculture, Die and Mold
Manufacturing Ind., Diamond and Jewelry Ind., Defense, Medical Equipment, Plastics
Processing M/C and Textile Machinery.
Figure 1. Jyoti CNC Automation Pvt. Ltd.

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1.2 MISSION AND VISION OF THE COMPANY
i. Have presence in all major engineering hubs globally.
ii. Contribute humbly in making of a developed Nation by Technological advancements,
catering to 20% of the Domestic Market, establishing Technology Centers in 10 major
cities.
iii. Patronize technical education by Instituting a Machine Tool Academy.
iv. Promote Eco-friendliness by developing energy efficient solutions.
v. Facilitate all the team members to enjoy the higher standards of living for a happier &
healthier life.
vi. Create a work environment that fosters- passion, creativity and optimism with fun,
respect and pride for all individuals.
vii. Being exceptionally customer centric, delight all our customers by all means and
action.
viii. Deeply admire brand among the Machine Tool fraternity.
1.3 AWARDS
i. Meaningful Technological Innovation Award at Engimach’08 held at Ahmedabad.
ii. Black Pearl Award for Display & Demonstration of Best Innovative Technology at
ENGIMACH 2006.
iii. Best Entrepreneurship Award for year 2004-05.
iv. CMTI-PMT Trust Award in IMTEX' 2004 for the Best Innovative Machine Design
"VMC 70 Linear".
v. FIE for Engineering Excellence in the IMTEX 2004 "SECT".
vi. Mr. Parakramsinh Jadeja, CMD, Jyoti CNC Automation Pvt. Ltd., has recently
achieved a National award for Best Entrepreneurship: Year 2003 from his
Excellency President of India Dr. APJ Abdul Kalam On behalf of Ministry of Small
Industries, Govt. Of India.
vii. Award for the Best Innovative Technology Display in Engimach’02.
viii. CMTI-PMT Trust Award in IMTEX 2001 for the Best Innovative Machine Design.
ix. The Machinist Award in IMTEX 2001.

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2. CNC WORK THEORY
Computer Numerical control (CNC) is used to automate the machine tools that are operated by
precisely programmed commands encoded on a storage medium, as opposed to controlled
manually via hand wheels or levers, or mechanically automated via cams alone.
Computers play an integral part of the control.
In modern CNC system computer-aided design (CAD) and computer-aided manufacturing
(CAM) programs are used for development and machining of the final finished product. The
series of steps needed to produce any part is highly automated and produces a part that closely
matches the original CAD design.
Modern CNC mills differ little in concept from the original model built at MIT in 1952. Mills
typically consist of a table that moves in the X and Y axes, and a tool spindle that moves in the
Z (depth). The position of the tool is driven by motors through a series of step-down gears in
order to provide highly accurate movements, or in modern designs, direct-drive stepper
motor or servo motors. Open-loop control works as long as the forces are kept small enough
and speeds are not too great. On commercial metalworking machines closed loop controls are
standard and required in order to provide the accuracy, speed, and repeatability demanded.
As the controller hardware evolved, the mills themselves also evolved. One change has been to
enclose the entire mechanism in a large box as a safety measure, often with additional safety
interlocks to ensure the operator is far enough from the working piece for safe operation. Most
new CNC systems built today are completely electronically controlled.
CNC-like systems are now used for any process that can be described as a series of movements
and operations. These include laser cutting, welding, friction stir welding, ultrasonic welding,
flame and plasma cutting, bending, spinning, hole-punching, pinning, gluing, fabric cutting,
sewing, tape and fiber placement, routing, picking and placing (PnP), and sawing.
Most CNC machines use Siemens or Fanuc made control systems. For Fanuc generally the
coding is done using G codes and M codes. G codes are used for machining operations and
movement of the tools whereas M codes are used for controlling the spindle movement like
on/off, rotation in clockwise or anti-clockwise direction and also for tool change operation.

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3. COMPANY PRODUCTS
Company mainly makes following categories of CNC machines :
3.1 TURNING/TURN MILL CENTERS (TMC)
i. Horizontal turning
a. Simple turning
b. Twin Spindle turning
c. Turn-Mill Centre
ii. Vertical turning center
a. Inverted turning line machine
iii. Oval turning center
This CNC machines are mainly used for facing, turning and center drilling operations. Oval
turning center is used for oval turning mainly for pistons of an engine.
Figure 2. TMC 160 Figure 3. VMC 1260.
3.2 VERTICAL MACHINING CENTERS (VMC)
i. 3 Axis machines
a. C- frame machines(PX series, VMC series)
b. Fixed table travelling column
c. Double column machines
d. High speed bridge type machines
e. High speed gantry machines
ii. 5-Axis machines
a. High speed bridge type machines
b. Double column high speed machines
c. High speed machines

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VMC machines were developed for higher precision and high speed over TMC machines. It
has moving table for easy access. The main difference between TMC and VMC is tool holder
(headstock) is rotating and job which clamped on pallet (table) moves in X-Y directions refer
Figure 4. Many operations like facing, turning, milling, profile cutting, boring, drilling can be
done easily with the help of VMC.
Mainly machine has three axis to move job and vertical column X-Y-Z. Usually pallet can only
move in X-Y direction and vertical column can move in Z- direction. In addition to this 3 axis
two more axis are available mainly for rotation and tilting action for easy machining of even
complex profiles.
VMC has ATC (Automatic Tool Changer) controlled by three servo motors to automatically
change the tool during machining process according to the requirement. Vertical spindle can
rotate up to 15000 rpm. Maximum torque that is available in any axis is 700 Nm
For fast work both two and six pallet VMC is also available which has APC (automatic pallet
changer) in which after completion of one operation in one job, pallet is automatically rotated
and another pallet is positioned for machining operation.
VMC can hold up to 120 tools in the tool post.
All movements of pallet and vertical column are through bolt screw. For less friction
movement of saddle and pallet over Linear Motion Guide ways (LM) either pneumatic or
hydraulic system is used. The whole VMC machine is operated by mainly Siemens and Fanuc
controllers.
Job has to be cooled down while operation is being done on it due to friction between tool and
job. Cooling system of job is also installed along with vertical column. Generally 1000 litre
coolant tank is used.
Usually cooling fluid is mixture of water and cutting oil of job. Scrap cleaning system is also
installed in VMC so that accumulated scrap or chips can easily be drained by flow of fluid.

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3.3 HORIZONTAL MACHINING CENTERS (HMC)
i. 4-Axis machines
HMC 560 is high speed, high precision 4 axis Horizontal Machining Center with worlds best
available features to match the demanding requirement of the industry. The machine has
special features like Three Point Leveling, axis rotary table and Electro Spindle. Maximum of
10,000 rpm is available for spindle. It is available either for single, double or six pallets out of
which all of them are rotary tables.
All the features are almost same as that of VMC but major difference is VMC has vertical
spindle axis whereas HMC has horizontal spindle axis. Also HMC is used for machining
bigger size components and is more precise.
Figure 4. General sketch of CNC
Figure 5. General block diagram of 3 axis CNC machine
Base

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4. COMPONENTS OF CNC
4.1 SPINDLE
The spindle is directly coupled with the spindle motor refer Figure 4 and avoids any errors in
indirect drive mechanism. This high speed spindle is specially designed to meet the
requirement of small component machining with high precision and dynamism. Spindle is
having BT-40 and 50Tool, HSK 100 interface taper for VMC machines.
4.2 SADDLE
Saddle is the part of CNC which is mounted on the Linea Motion guide ways (LM).
They provide for the linear motion in either X or Y axis.
4.3 BASE
Base is the base structure of CNC on which the entire operation of CNC is performed. It is
made of rigid structure of Cast Iron because of good compressive strength and vibrational
damping capacity. Refer Figure 4.
Figure 6. Saddle
4.4 LINEAR MOTION GUIDE WAYS (LM)
Linear motion guide ways or LMs are V or U shaped solid structure mounted on base for
saddle and on saddle for pallet to allow the saddle and pallet to slide over them linearly along
X and Y axis respectively.

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Figure 7. Linear Motion Guide Ways (L.M)
4.5 PALLET
Figure 8. Pallet
Pallet is used to clamp or unclamp job piece. It is mounted on LM which are mounted on
saddle. They are perpendicular to the LM mounted on base. That is, if one is in X- direction
then other one is in Y- direction.
4.6 AUTOMATIC TOOL CHANGER
The tool changer is a umbrella type Servo ATC having a 12 Tool magazine. The tool change
time is 3.5 seconds. Its main function is to change the tool during the machining according to
the requirement. It works with 3 servo motors. One for vertical motion up-down, one for rotary
action about Z-axis and one for clamping and releasing the tool.

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Figure 9. Automatic Tool Changer (ATC)
4.7 HEAD STOCK
It supports chuck and its mechanism. It possesses system which clamps and de-clamps of
work-piece.
Figure 10. Head stock
4.8 TAIL STOCK
It possesses the supporting elements. It is also used for supporting the long job pieces and also
used for centering and drilling purpose.
Figure 11. Tail stock

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4.9 TURRET ASSEMBLY
It is that part of machine which has tools to work on job. Generally it has ten to twelve
tools. It is used for holding the tools to carry out machining operations.
Figure 12. Turret assembly
4.10 CONTROLLER
It contains Siemens or Fanuc or Heidenhaim controller which controls the whole machine.
4.11 PUMPS
There are generally two pumps in CNC. One is for hydraulic oil transmission and another
for coolant circulation. Thus pump keeps the cooling and the lubrication system of the
CNC alive.
4.12 MOTORS
There are many different motors used mainly for revolving of chuck, another two for bolt-
screw, revolving of turret, and motion of work table i.e pallet in X and Y-axes..
4.13 OUTER SHEET METAL BODY
It provides safety to user and adds aesthetic value to the machine.

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5. ASSEMBLY OF CNC MACHINE
First step of assembly is to do three point leveling system by spirit level and then tight the
other 3 points. Thus the Base of CNC is fixed on the floor.
Figure 13. 3-Point leveling
Second step is to scrapping the paint from guide-ways for fitting L.M.. Then worker clean the
surface by diesel and air cleaner. Then fit the L.M. and it is supported by eccentric head bolts.
Then worker uses spray-cleaner to remove dust and mounts saddle on it. After that, he does
“Auto-collimator Test” for measuring allowances for top and side of L.M. Same process is
carried out for L.M. of saddle and then bolt-screw is mounted on saddle with two bearing and
its run-out testing is carried out and then again top and side of bolt-screw is maintained in
tolerance limit with help of dial-gauge indicator.
Dial gauge indicator is most important testing device for which range is between 2 µm to 10
µm for different purposes.
After that saddle is mounted on CNC bed. Then bolt-screw is mounted on CNC bed for z-axis.
Than the same process is carried out as it is carried out for bolt-screw of saddle. Then lock-nut
is mounted on it.
If surface plate is not accurately machined, scrapping is carried out till it slides thoroughly on
L.M.
During this process another worker mounts head-stock and tail stock on its base.

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After that chuck, pulley, motor and spindle is mounted on head-stock. Then mandrel is
mounted on chuck.
Figure 14. Chuck
Center line of head-stock and tail-stock must be co-lined, if not then it must carried out with
the help of height-gauge. Then the ATC is mounted and at the same time all the wirings are
connected with the motors and the pumps and then the entire electrical system is mounted.
After that telescopic cover is mounted on saddle to cover sliding mechanism from coolant.
After that hydraulic oil system is fitted with its all mountings like oil sump with nitrogen gas
accumulator, solenoid valves, pipe.
Finally the cold roll coil sheets are used for final guard (from metal chips and from water-oil
coolant). For preventing leakage of coolant, copper stripes is rigidly fitted with silicon gel.
Then Siemens or Fanuc controller is attached to the machine. Finally the doors are fitted so that
entire machine remains closed during operation for the safety of the operators. Chip removal
system and cooling fluid system was installed according to the demand
Now the machine is started and data is loaded on it.
Some of the CNC machine models are:
VMC -640, DX-250, ATM-160, VMC-430, TM-020, AM-430, TMC-350
Given is an example of DX-200 and DX-250.
i. Complete CNC machine Dx-200 is completely assembled within 6-7 days, while Dx-
250 takes 8 to 10 days.
ii. Minimum rpm is 1 and maximum rpm can be up to 6000.
iii. Hydraulic power pack is installed (hydraulic pressure up to 70 bar is generally used).
iv. Hydraulic system used is oil based.
v. It uses 440V AC source.
vi. Has pneumatic pressured air cleaning gun.

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vii. For all movement bolt screw is used.
viii. Tool post (turret) can hold up to 24 tools at a time.
ix. Using the Siemens controller operation begins and can prepare most complicated
operation with high accuracy.
Model Dx-250 is also available which is bigger in size than Dx-200, main difference in
assembling method between them is, In Dx-200 saddle is assembled at inclination keeping base
horizontal while in Dx-250 the saddle is assembled keeping the base inclined at 45degree for
assembly ease.
Figure 15. Dx-200
Figure 16. Dx-250
SADDLE

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6. DIFFERENT TESTS AND QUALITY CONTROL
6.1 AUTO COLLIMATOR
First and very important test is “Auto-collimator” is performed for perfect alignment of L.M.
with base. In this process, “Auto-collimator” which is light sensing device is used. For final
fixing of L.M., they provide 5 µm for side and 10 µm for top allowances.
Figure 17. Autocollimator test
6.2 LASER INTERFEROMETRY TEST
Laser interferometry is a well-established method for measuring distances with great accuracy.
Laser Interferometer contains a monitor, laser, retro reflector, measurement retro reflector.
Beam is passed from laser which goes through retro reflector. This retro reflector allows few of
the beams to pass through and it directly goes to measurement retro reflector. This is connected
to monitor which some the variation. If surface is fully flat then the intensity of rays is higher.
If any misalignment is present then the rays will be deflected. It will be monitored in the
computer.
6.3 RENISHAW BALL BAR SYSTEM
The Renishaw QC20-W ball bar system consists of the ball bar itself (essentially a very high
accuracy, telescoping linear sensor with precision balls at each end) and precision magnetic
mounts, one (adjustable) attached to the machine table and the other to the machine spindle or
spindle housing. In use the balls of the sensor are kinematically located in the magnetic cups.
This arrangement enables the ball bar to measure minute variations in radius as the machine
follows a programmed circular path around the mount on the machine table.
The data collected is sent to a PC, where Renishaw's software calculates overall measures of

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positioning accuracy (circularity, circular deviation) in accordance with international standards
such as ISO 230-4 and ASME B5.54 or in Renishaw’s own analysis reports.
Figure 18. Renishaw ball bar test
6.4 CNC COORDINATE MEASURING MACHINE (CMM)
3D Coordinate measuring machine which is compatible for providing increased accuracy and
measuring speed that helps to increase the quality of processes and products.
Figure 19. CMM test

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7. CASTING
7.1 CASTING PROCESS
Casting process is used to make the main body parts of CNC machine. The process cycle for
sand casting consists of six main stages, which are explained below.
Mold-making - The first step in the sand casting process is to create the mold for the casting. In
an expendable mold process, this step must be performed for each casting. A sand mold is
formed by packing sand into each half of the mold. The sand is packed around the pattern,
which is a replica of the external shape of the casting. When the pattern is removed, the cavity
that will form the casting remains.
Figure 20. Casting area
Clamping - Once the mold has been made, the cores are positioned and the mold halves are
closed and securely clamped together. It is essential that the mold halves remain securely
closed to prevent the loss of any material.
Pouring - The molten metal is maintained at a set temperature in a furnace. After the mold has
been clamped, the molten metal can be ladled from its holding container in the furnace and
poured into the mold.
Cooling - The molten metal that is poured into the mold will begin to cool and solidify once it
enters the cavity. When the entire cavity is filled and the molten metal solidifies, the final
shape of the casting is formed.

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Figure 21. Clamping the molds
Removal - After the predetermined solidification time has passed, the sand mold can simply be
broken, and the casting removed. This step, sometimes called shakeout, is typically performed
by a vibrating machine that shakes the sand and casting out of the flask. Once removed, the
casting will likely have some sand and oxide layers adhered to the surface. Shot blasting is
sometimes used to remove any remaining sand, especially from internal surfaces, and reduce
the surface roughness.
Trimming - During cooling, the material from the channels in the mold solidifies and attached
to the part. This excess material must be trimmed from the casting either manually via cutting
or sawing, or using a trimming press.
Figure 22. Heavy Cast and Shot Peening Machine

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7.2 CASTING DEFECTS
There are various types of defects that occur in casting process which is categorized by
American Foundarymen’s Society (AFS).
i. Broken or cracked castings
ii. Carbon floatation and other gross segregation
iii. Cuts
iv. Drops
v. Shrinkage defects
vi. Gas defects
vii. Hard spots, hand areas and chilled spots
viii. Inverse chills
ix. Mass hardness
x. Metal penetration
xi. Rough surface
xii. Runouts – escape of molten metal from casting mold
xiii. Warped Casting – bend out of shape due to pressure or heavy heat
Figure 23. Holding Furnace and Shot peening balls

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8. VARIOUS DEPARTMENTS
The company has following departments as well:
i. R & D center
ii. Grinding Shop
iii. Sheet metal shop
iv. Paint shop
8.1 R & D CENTER
Jyoti has developed a well versed and a versatile R & D center to keep up the company with the
international trends towards the automation and manufacturing excellence.
This research and development center has been developed to carry on the research activity in a
full fledged manner. The exclusive R & D center is been established to design and develop
technologically advanced world class machines for the better quality, reliability & productivity
to cater to sophisticated Aerospace, Automobile and Defense applications where high level of
accuracies and reliabilities are inevitable.
The Active R & D team of Jyoti has achieved outstanding success by developing TPM (Total
Productive Maintenance) friendly machines, CNC Machines with Linear Technology of higher
dynamics and productivity, in house developed software like POTS etc.
R & D activities here are conducted through a young team of 55 technocrat professionals
facilitated by latest softwares & assembly/testing and calibration equipments from world
renowned manufacturers.
8.2 GRINDING SHOP
There are different types of grinding machines in which many are imported from Europe.
8.2.1 HARDINGE KELLENBERGER
This machine is used for the grinding of ID as well as OD of the workpieces. This machine uses
the mixture of water and oil as coolant. The machine is imported from Switzerland.
8.2.2 STUDER – KORBER SCHLEIFRING
This is used for the grinding of OD of the workpiece. This machine is also imported from
Switzerland. It works around 1600 rpm.

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8.2.3 ELB – SCHLIFF
Edmund Lang Babenhausen is used for precision grinding. Grinding through this machine gives
very high accuracy. This machine works around 1500 rpm. These machines are mainly
manufactured in Hessen, Germany.
8.2.4 VG 400
This is used for the ID as well as OD grinding of workpieces.
8.2.5 HINDUSTAN MACHINE TOOL
This machine functions same as VG 400.
8.2.6 VRG 60
This is the twin spindle grinding machine. It runs around 12000 rpm. Japan is the main
manufacturer and Jyoti is one of the customers of VRG 60.
8.3 SHEET METAL SHOP
The machineries adopted by Jyoti are the world’s latest technologies. Sheet Metal is equipped
with very precise and versatile machinery producing precision sheet metal components.
The most modern first of its kind in India is the Sheet Metal plant of Jyoti having following
facilities:
Figure 24. Sheet Metal shop
Trumpf Machine of Germany is having Laser Cutting Technology. Welding and bending are one
of the main areas of sheet metal shop. The Sheet Metal is coated with CED primer and finished
with automated powder coating line and painting line. Robotic Welding has also been carried out
in the welding area.

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8.4 PAINT SHOP
Jyoti has established its own paint shop which is fully automated and it comprises of several
tanks pre-treatment process followed by CED primer coating.
Figure 25. Spray coating and sheet metal drying shop
Versatile paint shop which will deliver sheet–metal components duly powder coated / painted
with CED primer coating and castings will be delivered with CED primer coatings and followed
by backing.
8.4.1 DIVISIONS
The paint shop constitutes of the following tank:
i. Degreasing tank
ii. Water rinse 01tank
iii. Water rinse 02 tank
iv. Derusting tank tank
v. Water rinse 03 tank
vi. Water rinse 04 tank
vii. Surface activation tank
viii. Phosphating tank
ix. Water rinse 05 tank
x. Cathodic Electro Deposition – CED tank
xi. Permeate tank

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Figure 26. Water rinse tank
8.5 QUALITY ASSURANCE
Jyoti believes in the quote “Quality is avoidance of financial loss to society after the product is
shipped.”
Jyoti strives to achieve best-in-class quality and reliability of performance of all products
through a systematic approach that emphasizes quality at every stage of product development
through manufacturing. Before leaving the plant, the Jyoti CNC machine is passed through a
series of quality assurance tests.
Jyoti has established a system of quality in line with the ISO 9001:2000. We are aspiring to be
recognized as the quality manufacturers in the industry we serve by providing solutions to
customer’s problems by engineering and manufacturing quality machines at competitive price.

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9. CONCLUSION
In the 21st
century there will be an increasing demand of highly accurate machining and that too
in very less machining time. For this the best possible option as of now is Computer Numerical
Control Machines. This internship in Jyoti CNC Automation PVT Ltd has offered a great
learning experience in the field of automated lathe machines that is CNC machines and
exploiting its various aspects starting from their casting in their casting industry, machining of
that casted components for surface finishing, assembly of all the components and their quality
testing through various techniques.
This one month training has been very helpful in bringing out the thinking that real engineering
requires mainly focused on manufacturing concepts and the creativity of an engineer’s mind.

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REFERENCES
[1] www.jyoti.co.in
[2] www.huron.fr
[3] CAD/CAM/CIM, Third edition by New Age International Publishers