Presentation of Cold Rolling

HERO CYCLES(C.R.DIVISION)HERO CYCLES(C.R.DIVISION)

PRESENTED BY:PRESENTED BY:

P.N.MISHRA P.N.MISHRA

PLANT OVERVIEWPLANT OVERVIEW

COMPANYCOMPANY PROFILEPROFILE

DATE OF COMISSIONINGDATE OF COMISSIONING JULY JULY 19911991

PLOT AREAPLOT AREA 12 ACRE12 ACRE BUILT UP AREABUILT UP AREA 9 ACRE9 ACRE

HERO GROUP COMPANIESHERO GROUP COMPANIES HERO CYCLES LTD.HERO CYCLES LTD. HERO HONDA LTD.HERO HONDA LTD. MUNJAL SHOWAMUNJAL SHOWA MUNJAL CASTINGSMUNJAL CASTINGS MUNJAL AUTOMUNJAL AUTO ROCKMAN CYCLEROCKMAN CYCLE MAJESTIC AUTOMAJESTIC AUTO HERO CYCLES - C.RDHERO CYCLES - C.RD HERO MOTORSHERO MOTORS SUNBEAM CASTINGSUNBEAM CASTING

BICYCLEBICYCLE MOTOR BIKEMOTOR BIKE SHOCK ABSORVERSSHOCK ABSORVERS NON FERROUS CASTINGSNON FERROUS CASTINGS AUTO PARTSAUTO PARTS AUTO & BICYCLES CHAINAUTO & BICYCLES CHAIN MOPEDMOPED CR STEEL STRIPSCR STEEL STRIPS HERO PUCHHERO PUCH NON FERROUS CASTINGSNON FERROUS CASTINGS

HERO GROUP COMPANIESHERO GROUP COMPANIES HERO MINDMINEHERO MINDMINE HERO TECHTOUCHHERO TECHTOUCH HERO SERVITHERO SERVIT

TRAINING & EDUCATIONTRAINING & EDUCATION ERP/SAPERP/SAP ITIT

PRODUCTPRODUCT

COLD ROLLED COLD ROLLED STEEL STRIPSSTEEL STRIPS THICKNESSTHICKNESS 0.15 - 5.0 MM0.15 - 5.0 MM WIDTHWIDTH 20 - 760 MM20 - 760 MM GRADEGRADE D/DD/EDD/IF/MC-D/DD/EDD/IF/MC-

11/12/HC11/12/HC FINISHFINISH BRIGHT/DULLBRIGHT/DULL SHAPESHAPE COIL/SHEETCOIL/SHEET WEIGHTWEIGHT 150-12000 KGS150-12000 KGS

LIST OF SEGMENTLIST OF SEGMENT

BICYCLE INDUSTRIESBICYCLE INDUSTRIES AUTOMOTIVE INDUSTRIESAUTOMOTIVE INDUSTRIES ELECTRICAL INDUSTRIESELECTRICAL INDUSTRIES CONTAINER INDUSTRIESCONTAINER INDUSTRIES WHITE GOODS INDUSTRIESWHITE GOODS INDUSTRIES TRACTOR INDUSTRIESTRACTOR INDUSTRIES PICTURE TUBESPICTURE TUBES COSMETIC ITEMSCOSMETIC ITEMS

UTILITIESUTILITIES

CONNECTED LOADCONNECTED LOAD 19228.23 KW19228.23 KW CONTRACT DEMANDCONTRACT DEMAND 12500KVA12500KVA

H.R.SLITTERH.R.SLITTER TO CUT THE WIDE COIL INTO NARROW TO CUT THE WIDE COIL INTO NARROW

COILAS PER THE REQUIREMENT OF COLD COILAS PER THE REQUIREMENT OF COLD ROLLING MILLROLLING MILL

TO CONTROL THE O.D. OF THE COIL AS TO CONTROL THE O.D. OF THE COIL AS PER THE REQUIREMENT OF MILLPER THE REQUIREMENT OF MILL

IN CASE OF SINGLE SLIT TO REMOVE THE IN CASE OF SINGLE SLIT TO REMOVE THE CRACKED / DAMAGE EDGE CRACKED / DAMAGE EDGE

H.R.SLITTERH.R.SLITTER

PINCH ROLLERPINCH ROLLERFLATTNERFLATTNER ROLLERROLLER DEFLECTORSDEFLECTORS

UNCOILERUNCOILER

RECOILERRECOILER SHEAR UNITSHEAR UNIT SCRAP WINDERSCRAP WINDER

ARBORARBOR

DIRECTION OF OPERATIONDIRECTION OF OPERATION

GUIDE ROLLSGUIDE ROLLS

DEFECTS IN H.R. COILSDEFECTS IN H.R. COILS

SLIVERSSLIVERS SEAM LINESSEAM LINES ROLLED IN SCALEROLLED IN SCALE PITTINGPITTING LAMINATIONLAMINATION CENTRE LOOSENESSCENTRE LOOSENESS

PICKLING MACHINEPICKLING MACHINE

PICKLING IS THE PROCESS OF MILL SCALE PICKLING IS THE PROCESS OF MILL SCALE REMOVAL WITH THE HELP OF ACIDREMOVAL WITH THE HELP OF ACID

H2SO4 , HCL , HF , HNO3H2SO4 , HCL , HF , HNO3 HCL IS USED FOR THE PICKLING OF HCL IS USED FOR THE PICKLING OF

CARBON STEELCARBON STEEL HCL PICKLING PROVIDES SMUT FREE HCL PICKLING PROVIDES SMUT FREE

SURFACE SUITABLE FOR COLD ROLLING , SURFACE SUITABLE FOR COLD ROLLING , ELECTROPLATING , ETCELECTROPLATING , ETC

PICKLINGPICKLING

UNCOILERUNCOILER RECOILERRECOILER

FLATTNER FLATTNER ROLLERROLLER

SHEAR UNITSHEAR UNIT

ACID TANKSACID TANKS

BURR MESHERBURR MESHER

PINCH ROLLERPINCH ROLLER STRIP DRYERSTRIP DRYER

RINSE TANKSRINSE TANKS

BREAKER BREAKER UNITUNIT

ROLLING ROLLING

COLD ROLLING IS THE PROCESS OF COLD ROLLING IS THE PROCESS OF THICKNESS REDUCTION WITH THE HELP OF THICKNESS REDUCTION WITH THE HELP OF ROLLS AT ROOM TEMPROLLS AT ROOM TEMP

HEAT IS GENERATED IN THE PROCESS OF HEAT IS GENERATED IN THE PROCESS OF COLD ROLLING HENCE FOR THE COOLING OF COLD ROLLING HENCE FOR THE COOLING OF ROLLS AND STRIP COOLANT IS USED ROLLS AND STRIP COOLANT IS USED

Cont....

ROLLING ROLLING

THE PURPOSE OF COOLANT IS ALSO TO THE PURPOSE OF COOLANT IS ALSO TO IMPART ANTI RUSTING PROPERTIES TO THE IMPART ANTI RUSTING PROPERTIES TO THE SHEET AND THE ROLLEDSHEET AND THE ROLLED

ROLLING LEADS TO INCREASE OF THE STRIP ROLLING LEADS TO INCREASE OF THE STRIP HARDNESS HARDNESS

SURFACE FINISH IMPROVES AND GAUGE SURFACE FINISH IMPROVES AND GAUGE VARIATION BECOME UNIFORMVARIATION BECOME UNIFORM

4HI MILL4HI MILL

BACKUP ROLLSBACKUP ROLLS

WORK ROLLSWORK ROLLS

STRIPSTRIP

PAY OFF REELPAY OFF REELDEL. TENSION REELDEL. TENSION REEL

ENTRY TENSION REELENTRY TENSION REEL

NGNG

6HI MILL6HI MILL

BACKUP ROLLSBACKUP ROLLS

W.R.W.R.

E.T.RE.T.RD.T.R.D.T.R.

P.O.RP.O.R

I.M.R.I.M.R.

NGNG

SKIN PASS2HI MILL

SKINPASS:SKINPASS: IT HELPS IN IMPARTING IT HELPS IN IMPARTING FLLATNESS TO THE COIL FLLATNESS TO THE COIL

DECREASE HARDNESS OF COIL.DECREASE HARDNESS OF COIL. REMOVES WRINKLES OF COILREMOVES WRINKLES OF COIL REMOVES STRESSES FROM WITHIN THE REMOVES STRESSES FROM WITHIN THE

COIL.COIL.

2HI MILL2HI MILL

WORK ROLLSWORK ROLLS

SHEAR UNITSHEAR UNITCOIL STRIPCOIL STRIP

RECOILERRECOILER

UNCOILERUNCOILER

ANNEALINGANNEALING

Cont.….

Cold rolling of strip is a work hardening process Cold rolling of strip is a work hardening process and renders the strip hard and brittle. There are and renders the strip hard and brittle. There are very few uses of the cold rolled strip in this very few uses of the cold rolled strip in this condition. condition.

Annealing is a process of heating, soaking Annealing is a process of heating, soaking and controlled cooling of coil in a non-and controlled cooling of coil in a non-oxidizing atmosphereoxidizing atmosphere..

Metallurgically, the annealing process relieves Metallurgically, the annealing process relieves the stresses developed by Cold Rolling and the stresses developed by Cold Rolling and renders the strip soft and restores its ductility renders the strip soft and restores its ductility and formability. and formability.

We have two types of Annealing based on the We have two types of Annealing based on the atmospheres used atmospheres used

– HNX (95% N2+5%H2)HNX (95% N2+5%H2)

– HPH (100% HydrogenHPH (100% Hydrogen))

100% Hydrogen are the latest built furnaces and the 100% Hydrogen are the latest built furnaces and the strip that comes out of the furnace is extremely bright in strip that comes out of the furnace is extremely bright in appearanceappearance

TYPES OF ANNEALINGTYPES OF ANNEALING

ANNEALING BASE AND FURNACE



C.R. SLITTERC.R. SLITTER

C.R.S. unit (1,2,3) is employed for cutting C.R.S. unit (1,2,3) is employed for cutting rolled sheet to desired width & length as req. rolled sheet to desired width & length as req. by the customer. by the customer.

It has a number of cutters with spacers in It has a number of cutters with spacers in between them so that the desired width of between them so that the desired width of sheet can be obtained.sheet can be obtained.

The rolled sheet is mounted on one side of The rolled sheet is mounted on one side of the unit i.e. the uncoiler & is collected on the the unit i.e. the uncoiler & is collected on the coiler side with the req. widths.coiler side with the req. widths.

CUT TO LENGTH (CTL)CUT TO LENGTH (CTL) Cut to length unit (1,2,3) is req. for cutting the Cut to length unit (1,2,3) is req. for cutting the

sheet to desired lengths. sheet to desired lengths. A cutter that works under pressure does cutting. A cutter that works under pressure does cutting.

This is a programmable m/c, which cuts the sheet This is a programmable m/c, which cuts the sheet when it reaches the desired length with pressure. when it reaches the desired length with pressure.

Pressure application capacity is 0-7 Kg/cm^2. Pressure application capacity is 0-7 Kg/cm^2. Pressure applied is hydraulically controlled.Pressure applied is hydraulically controlled.

The maximum length cut is 2500mm. The capacity The maximum length cut is 2500mm. The capacity of the machine is 62 Tones / Shiftof the machine is 62 Tones / Shift

QUALITY SYSTEM QUALITY SYSTEM CERTIFICATIONCERTIFICATION

ISO-9001 2000ISO-9001 2000 ISO-14001ISO-14001

PRODUCT PRODUCT SPECIFICATIONSSPECIFICATIONS

IS 513IS 513 IS 7226IS 7226 JIS 1641JIS 1641 JIS 3141JIS 3141 DIN 1623DIN 1623 BS 1449 BS 1449 AS PER CUSTOMERS’ SPECIFICATIONSAS PER CUSTOMERS’ SPECIFICATIONS

PROPERTIES OF VARIOUS GRADESPROPERTIES OF VARIOUS GRADES

Stand. Grade Equiv.Grade Hard (RB) ECV UTS YS Elong.

JIS-3141 SPCC D 65 max. As 28 min. ----- 32 min.SPCD DD ------ per 28 min. ----- 34 min.SPCE EDD ------ chart 28 min. ----- 36 min.

Mechanical properties

Stand. Grade Equiv.Grade C% Mn% Si% S% P% Al%

JIS-3141 SPCC D 0.12 max 0.50 max. ----- 0.045 max. 0.04 max. -----SPCD DD 0.10 max 0.45 max. ----- 0.035 max. 0.035 max. -----SPCE EDD 0.08 max 0.40 max. ----- 0.03 max. 0.03 max. -----

Chemical composition



IS-513 D 65 max. As 27-41 28 max.28 min.DD 57 max. per 27-37 25 max.32 min.EDD 50 max. chart 27-35 22 max.36 min.



IS-513 D 0.12 max 0.50 max. ----- 0.04 max. 0.04 max. -----DD 0.10 max 0.45 max. ----- 0.035 max. 0.035 max. -----EDD 0.08 max 0.40 max. ----- 0.03 max. 0.03 max. -----




BS-1449 CS4 D 65 max. As 28 min. 14 min. 34 min.CS3 DD 62 max. per 28 min. 14 min. 36 min.CS2 EDD 55 max. chart 28 min. 14 min. 38 min.



BS-1449 CS4 D 0.12 max 0.60 max. ----- 0.05 max. 0.05 max. -----CS3 DD 0.10 max 0.50 max. ----- 0.04 max. 0.04 max. -----CS2 EDD 0.08 max 0.45 max. ----- 0.035 max. 0.03 max. -----




DIN-1623 ST12 D 65 max. As 27-41 28 max.28 min.ST13 DD 57 max. per 27-37 25 max.32 min.ST14 EDD 50 max. chart 27-35 21 max.38 min.



DIN-1623 ST12 D 0.10 max ----- ----- ----- ----- -----ST13 DD 0.10 max ----- ----- ----- ----- -----ST14 EDD 0.08 max ----- ----- ----- ----- -----




IS-7226 C40 MC-11 83 max. ----- ----- ----- -----C55 MC-12 85 max. ----- ----- ----- -----C70 88 max. ----- ----- ----- -----C80 HC-14 92 max. ----- ----- ----- -----



IS-7226 C40 MC-11 0.35-0.45 0.60-0.90 0.15-0.35 0.04 max. 0.04 max. -----C55 MC-12 0.50-0.60 0.50-0.80 0.15-0.35 0.04 max. 0.04 max. -----C70 0.65-0.75 0.50-0.80 0.10-0.35 0.04 max. 0.04 max. -----C80 HC-14 0.75-0.85 0.50-0.80 0.10-0.35 0.04 max. 0.04 max. -----




50 max. ----- 25-30 15 - 20 44 min.


IF


0.01 max. 0.20 max. ----- 0.02 max. 0.02 max. -----


IF

THICKNESS TOL. AS PER JIS-3141THICKNESS TOL. AS PER JIS-3141

Width Under 160 160 - 250 250 - 400 400 - 630Thickness (mm)Under 0.25 +/- 0.02 +/- 0.025 +/- 0.03 +/- 0.030.25 - 0.40 +/- 0.025 +/- 0.03 +/- 0.035 +/- 0.0350.40 - 0.60 +/- 0.035 +/- 0.04 +/- 0.04 +/- 0.040.60 - 0.80 +/- 0.04 +/- 0.045 +/- 0.045 +/- 0.0450.80 - 1.00 +/- 0.04 +/- 0.05 +/- 0.05 +/- 0.051.00 - 1.25 +/- 0.05 +/- 0.05 +/- 0.05 +/- 0.061.25 - 1.60 +/- 0.05 +/- 0.06 +/- 0.06 +/- 0.061.60 - 2.00 +/- 0.06 +/- 0.07 +/- 0.08 +/- 0.082.00 - 2.50 +/- 0.07 +/- 0.08 +/- 0.08 +/- 0.092.50 - 3.15 +/- 0.08 +/- 0.09 +/- 0.09 +/- 0.103.15 & over +/- 0.09 +/- 0.10 +/- 0.10 +/- 0.11

PERMISSIBLE DEVIATION IN PERMISSIBLE DEVIATION IN PRODUCT ANALYSISPRODUCT ANALYSIS

(IS 513)(IS 513)

C %C % 0.020.02 Mn %Mn % 0.030.03 Si %Si % 0.020.02 S%S% 0.0050.005 P%P% 0.0050.005

THANK YOU

Documents

Presentation of Cold Rolling