Electrical Discharge Sawing Machines

Benefits you will get with EDS machines:

Benefit A. Saving production time (Max cutting speed: 1800mm2/min)

Benefit B. Saving tool cost (the electrode is cheaper: around 1.2USD/pcs)

Benefit C. Saving material cost (the cutting gap is smaller: 1.5-2mm)


I.The machine characteristics:

(1)The machine utilizing anodic machining principle, cutting special steel
that can’t be easily cut, such as high-temperature heat-resistant alloys,
high chromium, high nickel alloy, titanium alloy. It can also cut steel
rail.
(2)The cutting efficiency is high, the maximum cutting speed is 1800mm2/min
(3)Use steel as the electrode, the cost is rather lower
(4)Cutting gap, ≤2mm, save precious steel


II. Specification


Model No.

EDS350

EDS600

EDS1100
,
Max. cutting diameter

φ350mm

φ600 mm

φ1100 mm

Max. workpiece width

810mm

1000mm

1100mm
,
Max. cutting travel

400mm

750mm

1200mm
,
Max. cutting length

Unlimited

Unlimited

50 , 0mm

Worktable dimensions

800x2000mm

1800x900mm
,
1200x2500mm

Worktable moving travel

800mm

800mm

800mm
& , lt; , br>Max cutting speed

1800mm2/min

1800mm2/min

1800mm2/min

Max. worktable load

2500kg

3000kg

20000kg

Electrode size

0.7～1.2(thickness)x25-40(W)x7420(L)& , lt; , br>
0.7~1.2(thickness)x25-40(W)x9550（L）& , lt; , br> ,
0.7~1.2(thickness)x25-40(W)x9550（L）

Cutting gap

≤2mm

≤2mm

≤2mm
& , lt; , br>Electrode Material

Steel

steel

steel

Max. output current

500A

800A

1000A

Controller

German Siemens

German Siemens

German Siemens

Feeding motor

Japan Panasonic AC servo motor

Japan Panasonic AC servo motor

Japan Panasonic AC servo motor



III. Introdution of Electrical Discharge Sawing machine.

1、Working theory

The machine utilizing anodic machining principle, cutting special steel
that can’t be easily cut, such as high-temperature heat-resistant alloys,
high chromium, high nickel alloy, titanium alloy. And the electrode is the
mild steel, which is running fast on the pulleys.



The work piece is positioned on the worktable. And the mild steel electrode
connects with the plus end of the power supply. And the work piece to the
minus end of the electrical power supply. There is a flushing device which
can supply sodium silicate solution (the coolant) to the cutting area. The
electrical discharging happens continually between the mild steel and the
work piece according to the drawing.



2、Simple description

The machine is equipped with the main machine body, working liquid system
and controller.

1) The main machine body

The machine is gantry structure which is made up with the worktable parts,
moving crossbeam and upright column the motorized electrode, etc.

⑴ Worktable

The worktable is used for holding and adjusting the work piece. The
worktable moves from point to point or continually, derived by the motor and
couple and ball screw on the V guide way of the machine body.

⑵ Device of running the belt type steel electrode.

This device has functions of running& guiding and controlling the tension of
the belt type electrode steel and also the function of higher power supply
feeding, and checking and protection of belt-breaking.

The belt type steel electrode is running on the driving pulley and slave
drive ones which are installed on the both holders of two ends of the
crossbeam.

The driving pulley is moved by the 3 phases motor and the slave drive pulley
by hydraulic pressure. The belt type steel electrode is guided with two
guiders in order to make sure the electrode is under good tension condition.
And the belt type steel electrode tension can be adjusted by the hydraulic
pressure. In case the belt type electrode breaks or the tension is weak, the
alarm will appear at once and the machine will stop working too. The power
supply feeds through the pulley, installed with the power feed brush, pulley
axle and to the belt type steel electrode.

The steel belt electrode is held by four sets of guiders in order to make
the electrode running in the same surface of the work piece cross section
and make the cutting gap as small as possible. There are flushing mouths on
the guiders, which offer the working liquid to the cutting area.

⑶ Upright column and device of the motorized belt type steel electrode.

The device of the motorized belt type steel electrode is moved by the A/C
servo motor which drives the gear reducing mechanism with ball screw. So the
belt type steel electrode can move to/away the work piece.
The upright columns are installed the linear guide ways, which hold the
device of the motorized belt type steel electrode. In order to make the
device move flexibly and reduce the loading of the servo motor, there are
the weight balance parts connected with the device of the steel electrode by
a roller chain inside of the upright columns.

The limited switches are installed on the device of the motorized electrode.
And there is a traveling ruler near to the device for the operator to check
the travel during working.

2、The system of working liquid

The working liquid is taken to the flushing mouths by pump. And then it
flushes to the work piece by the adjustable mouths and return to the
collecting tank. The liquid after filter can be used repeatedly.



The supplier will supply the way how to mix the working liquid and the
installation floor plan. And the end user designs and builds the liquid tank
and the collecting liquid path according to the floor plan and also the
workshop area.

3、Electrical power supply and control

⑴machining electrical power supply

The machine applies the special linear transform to exchange the 3 phases
A/C electrical power into the lower voltage and high current working power
supply.

Main specification of the power supply:

Input：3 Phases 380V 50Hz

Output：32V～50V divided into adjustable 4 levels.

Max machining current：500A/800A/1000A subject to different models.

⑵Controller system

The machine applies the programmable PLC to control the running of all kinds
of functions stable.

The power units are 3 phases asynchronous motors expect the Panasonic A/C
motor that drives the device of the belt type steel electrode. All motors
return circuits are installed with the protecting switches to avoid the
overloading.
The system of the auto feeding steel electrode can inspect the discharging
gap in real time, and it will adjust the feeding speed automatically
according to the working situation in order to make the cutting under the
stable and efficient condition.

Minimum Order: 1 sets

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