JF-505 INDUSTRIAL ROBOTICSLACTURER : ABDUL RAHMAN BIN MOHAMMAD
Muhammad Azrizal Bin Abd Rashid
Mohammad Taufik Bin Shafian
Muneer Martadza
03 BTP 11 F 2011
03 BPT 11 F 2007
03 BTP 11 F 2004
HYDRAULIC SYSTEM
Characteristic
Components
Applications
Advantages & Disadvantages
Basic Circuit & Explanation
WEAR RESISTANCE
Wear resistance is a hydraulic fluid's ability to reduce
the wear rate in frictional boundary contacts.
Anti wear hydraulic fluids contain anti wear
components that can form a protective film on metal
surfaces to prevent abrasion, scuffing, and contact
fatigue.
Antiwear additives enhance lubricant performance and
extend equipment life.
OXIDATION STABILITY
Oxidation stability is a hydraulic oil's resistance to heat-
induced degradation caused by a chemical reaction
with oxygen.
Hydraulic oils must contain additives that counteract
the process of oxidation, improve the stability and
extend the life of the fluid.
Without these additives, the quality of the hydraulic
oil will deteriorate quickly.
COMPRESSIBILITY
Compressibility is a measure of the amount of volume reduction due to pressure.
Although hydraulic oils are basically incompressible, slight volume reductions can occur under certain pressure ranges.
Compressibility increases with pressure and temperature and has significant effects on high-pressure fluid systems.
It causes servo failure, efficiency loss, and cavitation; therefore, it is important for a hydraulic oil to have low compressibility.
FOAM RESISTANCE
Foam results from air or other gases becoming entrained
in the hydraulic fluid. Air enters a hydraulic system through
the reservoir or through air leaks within the system.
A hydraulic fluid under high pressure can contain a large
volume of dissolved or dispersed air bubbles. When this
fluid is depressurized, the air bubbles expand and produce
foam.
Proper foam inhibitors modify the surface tension on air
bubbles so they more easily break up.
APPLICATIONS
Metal forming machinery
Conveyor systems
Foundries & primary metals plants
Presses, including cushions, clutches & brakes
Automated assembly systems
Packaging systems
Grinding & honing applications
Plastic injection & blow moulding
R & D test facilities
Plant central systems
Material handling & robotic systems
ADVANTAGES & DISADVANTAGES
Advantages:
Flexibility
Multiplication of Force
Simplicity
Compact
Economy
Safety
Disadvantages:
Efficiency
Cleanliness
BASIC CIRCUIT & EXPLANATION
The animations show the sequences in a basic hydraulic circuit in simplified form - the actuation and spring return of the final control element (4/2-way valve), the advance and return of the drive component (double acting cylinder) and the opening and closing of the pressure relief valve.