This document describes a student project to study the kinematic mechanism of a cross cut shear machine in the plate mill of Bhilai Steel Plant. It provides background on Bhilai Steel Plant and outlines the objective of studying the cross cut shear machine. It then describes the technical characteristics, design, working, and maintenance of the cross cut shear machine. The conclusion states that the project provided valuable practical experience for the engineering students.

1. “Cross Cut Shear
Machine” In Plate Mill Of
Sail Bhilai
UNDER GUIDENCE
OF :-
Prof. Girish Pathak
Ashok Kujur (BE/15236/11)
Abhishek Kumar (BE/15196/11)
Viplav Halder (BE/15137/11)
Satyam Kumar (BE/15166/11)

2. INTRODUCTION
Bhilai Steel Plant –
A symbol of Indo-Soviet techno-economic collaboration.
Its Covers 36𝑘𝑚2
area.
The eleven-time winner of the Prime Minister's Trophy for best
integrated steel plant in the country.
The plant was commissioned with the beginning of the first blast
furnace by then president of India, Dr. Rajendra Prasad, on 4 February
1959.
 Is one of the first three integrated steel plants set up by Government of
India to build up a sound base for the industrial growth of the country.
Bhilai Steel Plant (BSP), has been India's sole producer of rails and
heavy steel plates and major producer of structural steel.

3. OBJECTIVE
THE OBJECTIVE OF OUR PROJECT IS TO:
To Study The Kinematic Mechanism
Of Cross Cut Shear Machine

4. Operations In Plate Mill
 Slab heating
 Descaling
 Rolling
 Punching
 Levelling
 Cooling
 Inspection
 Shearing to required size
 Normalized
 Dispatch

6. TECHNICAL CHARACTERISTICS
1. Knives length 3700mm
2. Number of strokes 18/min
3. Maximum thickness of shear material 40mm
4. Maximum width of shear material 3450mm
5. Number of cuts with thickness 31-40 mm 8/min
6. Number of cuts with thickness upto 30mm 10/min
7. Knives opening 150mm
8. Tensile strength of sheared materials 100 Mpa
9. Elongation of sheared materials 30%
10. Main drive DC 2×530 KW n=720rev/min
11. Drive for knife gap adjustment N=940rev/min

8. DESIGN DESCRIPTION
(1) Gear-box and a platform with
the drives.
(2) Cast steel slide with mobile
upper knife of arched form.
(3) A left hand and a right hand
housing .
(4) A knife table and a front wall.

9. (1) Cross cut shear work in operation start–stop.
(2) It is responsible for the vertical displacement of
upper knife.
(3) Simultaneous movement of hold-down assembly
with the upper knife.
(4) Derollment of upper knife from left to right towards
the lower knife.

10. 1.
Roller amplitude under the plate 72mm
2.
Roller amplitude above the plate 20 mm
3.
Length of travel 250mm
4.
Number of rollers 09
5.
Pitch of rollers 600 mm
6.
Dimension of rollers diameter × length 400×3300 mm
7.
Drive N= 25 kw
n=600rev/min
TECHNICAL CHARACTERISTICS

12. (1) The whole table can be moved off by 250
mm with the help of hydraulic cylinders for
enlarging of the gap for release of cuttings.
(2) The tilting table is lifted over the level of the
roller- table by means of plungers fastened
in the shears housings necessary to return the
material back to the cutting edge of the
knives.

13. 1.
Pull force in the rope 19000 N
2.
Drive N= 2.2 KW n= 710 rev /min
3.
Gear ratio I=25
4.
Pull out speed V=83 mm/sec
KNIFE DISPLACEMENT DEVICE
TECHNICAL CHARACTERISTICS

14. (1) Consists of two coiling devices
placed on opposite side of
shears.
(2) It is composed of a coiling drum
driven by a motor over bevel-
spur gear box with a disengaging
coupling.

15. (1) It is used for the replacement of knife.
(2) The whole set is done manually and by hydraulic
action.
(3) Knife gap is set manually at the time of replacement
during an interval of 15 days.

16. PLATE END PUSH OFF DEVICE

17. 1. Maximal length of ends 1200mm
2. Feed speed of arm 0.5m1/sec
TECHNICAL CHARACTERISTICS

19. (1)Mounted on the front wall of shears.
(2)Consists of 3 hydraulic cylinders,3 push-off shoes,3
levers and a hollow shaft.
(3)The lever with push-off shoe is accommodated 250mm
from the center of the shears.

20. (1)Plate ends up to the length of 1200 mm are
pushed off by means of arms of the push-off
device.
(2)Operated by 3 hydraulic cylinders and 3 lever
arms.
(3)Linear motion of cylindrical shaft is converted
into rotational motion of the lever arm.

21. HYDRAULIC PRESSURE STATION
1. Operation liquid Hydraulic oil
2. Maximum operation pressure 6.4 Mpa
3. Rated quantity supplied by pumps 2×63 l/min
4. Power of electromotor 2×11 KW
n=1450rev/min
5. Volume of pressure vessel 3×32 L/min
6. Rated effective tank volume 400 L
7. Quantity of cooling water 40 L/min
8. Maximal size of impurities 0.1mm
TECHNICAL CHARACTERISTICS

22. (1) Hydraulic station works with
accumulator drive.
(2) Vessels are prefilled with
nitrogen.
(3) Accumulators is refilled by a
large container.
(4) The station is equipped with
two gear- wheel pumps.

23. (1) Oil supply to the required site.
(2) Contains 3 accumulators to store a larger quantity
of oil.
(3) Also acts as an absorbing element against the
pressure shocks in the hydraulic system.
(4) Maintain the pressure column up to a safety limit.

24. MEASURING ROLLER
1.
Diameter of measuring roller 191 mm
2.
Stroke of roller 135 mm
3.
Air pressure for cylinder 0.4+ 0.6 Mpa
4.
Air consumption for cylinder and blowing 2 /hour
TECHNICAL CHARACTERISTICS

25. (1)Mounted in antifriction bearings placed inside the
mobile lever.
(2)The stroke of the lever is controlled by a pneumatic
cylinder.
(3)The cylinder is equipped with a contactless breaker,
which in rotation of the roller transmits rectangular
electrical impulses.
(4)The whole device is accommodated on a plate, which
is fastened on the bracket in the shears.

26. Done in given five steps
(1)Grinding of knives
(2)Knives exchange
(3)Fastening of knives adapters
(4)Knives removal
(5)Knives mounting

28. CONCLUSION
Engineering students gain theoretical knowledge through books. It is volatile and
not of much use without knowing its practical implementation.
Training is one of the important aspects for an Engineering students carrier to
strengthen the practical concepts.
It was an awesome experience in training as the things we all learnt in our
previous months was seen implemented practically. We got to see the live
performing equipment and operation like Cross Cut machining, Descaling,
Rolling, Hot Punching, Levelling, Cooling etc.

29. REFERENCE
http://www.wikipedia.org/
http://www.sail.co.in
http://www.industry.siemens.com/
http://www.slideshare.net/
www.essarsteel.com
http://www.worldsteel.org