WorksheetsSoalan Pengetahuan CNC EDM Die Sinking
Total questions: 26
Worksheet time: 2hrs 57mins
What is meant of EDM ?
Electrical die machine
Electrical die set machine
Electrical discharged machine
Electrical die sinking maching
In the EDM process, the electrodes and workpieces are independent of ?
Oil
Grease
Burr
Spark
When an electric current is passed from the electrode to the workpiece, this will cause it to occur ?
Spark gap
Spark charged
Spark frequency
Spark discharged
The effect of temperature during the EDM process of corrosive metals can reach temperatures in between?
8000-10000°C
6000-12000°C
8000-12000°C
9000-12000°C
The fine particles produced during the corrosion process will be cleaned by ?
Air Spray
Dielectric flushing
Spark dielektrik
Coolant
“It is an overcut that the size of the workpiece cavity is larger than the size of the electrode ”, this statement is in accordance with the term ?
Spark gap
Super gap
Clearance gap
Charging gap
What is the meaning of the symbol in the diagram above ?
Straightness
Flatness
Squareness
Lineness
This setup will produce a crater-shaped surface on the workpiece, what is the appropriate term for that statement?
Billet
Capasitor density
Current density
Catalyst
…….. is a short circuit that occurs due to carbon particles accumulating in the spark gap.
Ampere
Anode
Anisotropic
Arching
This setup will produce a crater-shaped surface on the workpiece, what is the appropriate term for that statement ?
Billet
Capasitor
Current density
Catalyst
This parameter will allow the surface of the workpiece to be smoother as its value is increased
Frequency
Composite
Deionzation
Electrolyte
This material serves to assist the machining operation because the discharged spark will only occur when present ?
Dressing
Dielectric fluid
Discharged channel
Electrical resistivity
Flushing type ……. works by sucking a dielectric fluid through a hole drilled in an electrode or workpiece.
Pressure flushing
Side flushing
Vibration flushing
Suction flushig
Electrode from material… ... is not suitable for machining workpiece material from carbide material, what is the electrode material ?
Copper
Brass
Graphite
Tungsten
Electrode type… .. can be brazing directly to the electrode holder?
Aluminium
Bronze
Copper tungsten alloy
Silver tungsten alloy
What are the main current factors to determine the size of an electrode ?
Electrode material
Electric current
The shape of the cavity
Flushing
The size of the spark gap of an electrode is determined by the following factors except :-
Electric current
Electrode materials and workpiece materials
Electroforming
Surface finish
Why does an electrode need to be reduced in size to produce a cavity
It takes quite a long time to corrode the metal
It depends on the shape of the cavity to be produced
It is controlled by the cutting parameters of the edm die sinking machine
It depends on the suitability of the electrode material with the workpiece
Calculate the size of the roughing electrode, if the cavity width is 52.00mm, the roughing spark gap is 0.52mm and the finishing spark gap is 0.22mm
50.25mm
50.35mm
50.42mm
50.52mm
There are two types of power supply that are commonly used on EDM machines, namely Resistance capacitance and .............
Fanuc type
Charmilles
Pluse
Preston
Which of the following statements has nothing to do with the basic principles of EDM?
The production of electrical charge occurs between the anode and the cathode (workpiece)
The temperature when the charge is released is very high between 8000°C-12000°C
The production of this charge occurs in a dielectric fluid
The anode (electrode) must be of copper material and the cathode (workpiece) must be of steel material
The following statements are applicable to Computer Numerical Control (CNC). Select only the incorrect statement.
The CNC machine will execute everything that has been programmed in the MCU (Machine Control Unit) according to a specific 'Software'
CNC control units such as computers, for example, operate according to programs stored in computer memory
The program can only be inserted into a CNC machine via punch tape and diskette
Corrections can be made to the program can be done directly on the machine
What happens if EDM machining is carried out without using Dielectric (water or oil)
Machining can be carried out, but produces a poor finish
Machining can be carried out, but the electrodes and workpiece will be damaged
Machining cannot be carried out, as there is no cooling system
Machining cannot be carried out, as there is no current flow
The determination of the power adjustment schedule is based on the following:-
workpiece material
Spark gap
The diameter of the wire
Accuracy or precision
By flowing a dielectric at high pressure through a hole drilled in an electrode or workpiece is specified as a method
Suction Flushing
Vibration Flushing
Pressure Flushing
Injection Flushing
The Operation Diagram shows a type of flushing method in EDM Die Sinking machining. Based on the Operation Diagram, what is the type of flushing?
Side flushing
Suction flushing
Pressure flushing
Vibration flushing
