ppt on steering
DESCRIPTION
Its a powerpoint presentation on steering of vehiclesTRANSCRIPT
SONA KOYO STEERING SYSTEMS LTD
Presented By Kuldeep Rajput
SONA KOYO STEERING SYSTEM
SONA GROUP
The SONA GROUP started in1987 & collaborated with KOYO SEIKO company of JAPAN.The location of its first plant was in GURGAON.The other plants at DHARUHERA, BAWAL & CHENNAI.
HISTORY OF SONA GROUP
GENERALThe purpose of the steering system is to allow the driver to control the direction of the vehicle by turning the front wheels.
There are two basic types of steering system MANUAL & POWER. in the MANUAL SYSTEM, the driver’s effort to turn the steering wheel is the primary force that causes the front wheels to turn to the left or right on the steering knuckles. with POWER STEERING, the driver’s turning efforts are multiplied by a Hydraulic assist.
STEERING SYSTEM
DIFFERENT TYPES OF STEERING SYSTEMS• Rack and Pinion Type• Re-circulating Ball Screw Type
MANUAL STEERING POWER ASSISTED
Hydraulic Power Electrically Assisted
Column Type EPS (CEPS)
Pinion Type EPS (PEPS)
COMPONENTS OF STEERINGSThe manual steering system incorporates a steering wheel, shaft, column, a manual gear box and pitman arm; drag link and knuckle arm, tie rod.
RACK & PINION TYPE STEERING
The rack-and-pinion gear set does two things: It converts the rotational motion of the steering wheel into the linear motion needed to turn the wheels. It provides a gear reduction, making it easier to turn the wheels.
On most cars, it takes three to four complete revolutions of the steering wheel to make the wheels turn from lock to lock (from far left to far right).
The pinion gear is attached to the steering shaft. When you turn the steering wheel, the gear spins, moving the rack. The tie rod at each end of the rack connects to the steering arm on the spindle
WORKING OF R & P STEERING SYSTEM
Power Steering There are a couple of key components in power steering in addition to the rack-and-pinion or re-circulating-ball mechanism.
InOut
Left Turn
Right Turn
Right Turn Oil Flow
Left TurnOil Flow
Power Steering System (Rack & Pinion type)
The power steering system consists of:- Rack and pinion steering gear box- Power steering oil pump- Oil reservoir- TubesThe power steering system uses a hydraulic pressure which is generated by the power steering pump to re-duce the effort required to turn the steering wheel. The power steering pump is mounted on the front of the engine.The power steering fluid is drawn into the pump from the reservoir when the engine is running. The fluid is pressurized by a power steering switch and a control valve located in the power steering pump.
System construction
WORKING PRINCIPLE The engine driven hydraulic pump supplies oil at a pressure to a control valve (Pinion Valve Assembly) situated in housing that supports the pinion shaft.
The movement of steering wheel imparts movement to the control valve through the steering column.
The torsion bar moves the control valve, which in turn directs the oil to one side of the piston inside the steering housing( Cylinder Tube), depending on the direction of rotation of steering wheel.
The control valve is a rotary spool type valve controlled by the torsion bar inclosed in the steering case.
The amount of twist of the torsion bar an the movement of the spool valve is proportional to the effort applied by the driver on steering wheel in any direction.
Power Rack-and-pinion
Operation of the pinion and valve assembly (at the center position)
Operation of the pinion and valve as-sembly (turning left)
Operation of the pinion and valve as-sembly (turning right)
PINION & VALVE ASSEMBLY
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VALVE BODY
INPUT SHAFT
TORSION BAR
PINION SHAFT
PARTS OF PV ASSEMBLY
21
PRCESS FLOW OF VALVE BODY
I.D DEBURRING
TURNING SPLINE BROACHING SLIT BROACHING THREE WAY DRILLING
INDUCTION HARDENING
SLEEVE PRESSINGOD GRINDING
ID GRINDING SLIT GRINDING ID HONNING ID & OD BUFFING
I.D BUFFING
DIP TYPE WASHING
PASS HOLE PINNING
CRACK CHECK
FINAL WASHING
PRCESS FLOW OF TORSION BAR
Turning Serration Rolling Washing
O.D Grinding Straightening Induction hardening
Crack check Final Washing
PRCESS FLOW OF INPUT SHAFT
8-Slot machining Three drill pass hole Induction hardening ID. Deburring
Grinding Final washing
PRCESS FLOW OF PINION SHAFT
Raw material
Washing machine
Marking machine
Drilling Reaming machine
Pin pressing machine
Deburring machine
Crack Detection
Final washing
Induction hardening
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