summry of industrial scenario
TRANSCRIPT
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INDUSTRY PROFILE
Established in 1982, Toyo Springs was setup nearDelhi in Rai, Sonepat, Haryana (India) underentrepreneurship of Mr.P.K.Sharma. Over the lasttwo decades, Toyo Springs has fast emerged on
the horizon of Multileaf and Parabolic Springs asa leading manufacturer. Toyo's successfulendeavors truly reflects on its clientele with OEMlike TATA MOTORS, MAHINDRA, MARUTI SUZUKI,
SWARAJ MAZDA, VOLVO, SCOOTERS INDIA,ASHOK LEYLAND and exports to USA,EUROPE,AUSTRALIA.
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PRODUCTS
Leaf spring
Parabolic spring
Multi leaf spring
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MANUFACTURING SYSTEM
TOYO Springs has a highly qualified team of
professionals especially trained by technical
partner DAEWON CORP of South Korea.
TOYOs design department uses 2D & 3D CAD
programs such as AutoCAD, CATIA, PRO-E and
stress analysis is done by ANSYS.
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CAPABILITIES OF TOYO
To design & develop conventional & parabolic
leaf springs as per customer's requirement.
To do value engineering of existing springs
resulting in weight reduction & reduced cost.
To conduct FEA analysis, endurance test, load
test, metallography, chemical analysis and salt
spray test.
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DESIGN SOFTWARE
AUTOCAD
PRO-E
CATIA Leaf Spring Design Software L028
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RAW MATERIALS
Chrome manganese steel; sup 9, sup
9achrome vanadium steel; 50crv4
Chromium boron steel; sup 11a.
Chrome molybdenum vanadium steel;
51crmov
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HEAT TREATMENT
Heat treatment is a process which is used to
change the physical and chemical Properties
of a material.
Heat treatment involves heating at very high
temperatures so that hardening or softening
of material is obtained.
Heat treatment is an important operation in
imparting high mechanical properties.
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Annealing
Annealing is a process in which first heating of
metal is done and then cooling is done at
slower rate so that refined microstructures are
formed.
Here heating is done to a point where
recrystalization takes place.
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PURPOSE OF ANNEALING
To reduce hardness.
To relieve internal stresses.
To improve machinability
To increase or to restore ductility
To refine grain size
To reduce or eliminate structural inhomogeneity
To prepare steel for subsequent heat treatment
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Hardening
Hardening is a process in which steel is heated
to austenite temperature and then quenching
is done in water oil or molten salt baths.
In the manufacturing of leaf springs hardening
is done by heating material from 850 to 950 C
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QUENCHING
Quenching is a process in which cooling of
material is done at rapid rate. This process is
done so that martensite transformation of
material is obtained.
Quenching is done by heating it from 350 to
500 C and after that it is cooled rapidly in oil
and when cooling is done then its hardness isincreased.
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TEMPERING
Tempering is a process in which heating is
done to increase the toughness of material
and this is done after hardening so that some
extra hardness that occurs in a material can be
reduced
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ADVANTAGES
Residual stresses are relieved
Ductility is improved
Toughness is increased Higher the tempering temperature more will
be the residual stresses due to which hardness
is reduced and toughness is increased.
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PRIMER PAINTING
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ASSEMBLING OF LEAF SPRING
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FINAL PRODUCTION
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REFRENCES
Heat and mass transfer by P. K. Nag.
Strength of materials by R. K. Rajput.
www.toyosprings.com. Machine design by R. S Khurmi.
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THANK YOU