PRACTICAL-NO.
6
AIM: ldentification, function of each component, working and
refacing machine operation of cylinder head
APPARATUS REQUIRED: Cylinder head refacing, machine
cylinder head
THEORY
DESCRIPTION: it is an ideal machine for off hand grinding
type of engineering work shop and operation and
variety of material can be ground .It iscan be used in all
and used. casy to operate
Construction: The machine comprises of grinding wheel, table
position of grinding in relation to surface, electric motor the
wheel which is located in front of thethe work table surface is regulated by rotating hand
machine
Work table: It is cast from special wear
main pedestal with provision for wheel.resistant iron alloy, machined and assembly to the
guide plate Removing a slide does removing the wheel or
Disc plate or guide plate: It is
operator as only the required amountincorporated to faciliate easy and safe working for the
of wheel surface need to
ground exposed work piece being
Grinding wheel: There are eight
24mm size arranged radially on rectangular grinding wheel stone of size
a round moving wheel at the 150*80*25mm,
Material of the stone is white alloy Al203. alloy is used as a center of the machine.
has got a tendency to practice more special form of an abrasive It
quickly, presentinga new and sharper
the work. This abrasive is mainly
selected for wheels used for grinding cutting edge to
component in the production unit. hardened tools
All the moving parts in the main pedestal of the
machine and run on angular contact
bearing which wear with both journal and Thrust load .A totally enclosed to prevent
dust, dirt entering the bearing surface. any
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ELECTRIC MOTOR: A 3phase,31HP,1440rpm motor Is used. The motor drive is transmitted
through the belt to the external rotating grinding wheel assenbly.
WHEEL DRESSING ARANGEMENT: Diamond dressing attachment is used for dressing the
grinding wheel.
LUBRICATION: Removing the cover plate on main pedestral giving access to all moving
parts does the lubricating of all bearing.
PROCEDURE:
" Firstly take the cylinder head which is going to be refacing.
" Remove all dirt from the cylinder head with the help of a cloth.
" Now switch on the button and motor will start.
" Place the cylinder head on work table and slide it one side on the work table so that
the carbon deposit in the cylinder head is removed or cleaned.
PRECAUTION:
1. You have to make sure that you use the correct feed rate and speed.
2. Always test the machine before place the cylinder head on the work table.
3. Carry out maintenance at regular Interval of time.
RESULT: THE CYLINDER HEAD IS NOW REFACED.
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