Electric Spark Die Sinking EDM (D7145) Machine

This machine matches with the pulse source cabinet. Z-axis matches Japanese SANYO DC servo motor and it has Z-axis CNC features. X, Y axes adopt precise ball screw and raster display to conduct coordinate display, which make high precision positioning. The electric box uses the most advanced industrial special main-board, so it has strong function, good stability and simple operation. As long as you input a few parameters like Z-axis depth, it will bring up suitable data from the rich expert database system, automatically achieving finishing.

MAIN APPLICATION
The precision electric spark sinking machine, by using conducting materials such as copper, graphite, steel, etc. As the tooling electrode, is mainly applied to process precision punches, dies, small holes and irregular cavities. The workpieces are usually conductors. The machine is an ideal choice for mechanical machining and mould manufacturing.

BRIEFS ON MAIN COMPONENTS
The machine is composed of spindle case, column, machine body, working table, liquid trough, liquid tank, fixture and accessories.

1. Spindle case and column
(1) Servo motor driving system
The spindle is driven by a DC servo motor through a pair of synchronizing gear and a sliding screw set. The spindle moves on a linear double-rail roller guide. A centimeter dial gauge is equipped under the
Spindle head, which is used to indicate whether machining is in normal condition.
(2) Double-stroke of the spindle case
The spindle is mounted on a slider driven by an AC motor through a gear and a sliding screw set. The spindle case moves on a sliding "V"-and-flat-rail guide, the movement of which is indicated by a scale.
Limit switches are used for safe operation of the slider within its stroke. Also the slider can be locked with locking devices attached to the clamping plates.

2. Machine body, conveyor and working table

3. Liquid recycling and filtering system
(1) Brief introduction of the system's structure
The system is composed of a machining liquid trough and a liquid tank with a filter.
(a) The liquid trough is constructed with welded steel plates and oil resisting rubber seals. The front and right hand side wall can be opened. At the left hand side within the trough there locate a liquid level
Adjustment switch, switches and joints for oil injection and evacuation.
(b) Liquid tank
(2) Working principle
Oil is pumped from the tank through the oil filter and runs through the paper filter and various adjustable valves and pours into the liquid trough. Oil can be added, injected or evacuated during working process if it is necessary. The used oil returns to the tank through oil level adjustment switch and oil discharge switch. After preliminary deposit the oil was sucked from the suction port. Thus a complete cycle ends.
(3) Notes for operation
A. After the machine is installed, pour 400-500L of exclusive liquid for electric spark machining or pure kerosene in the tank.
B. Use of various valves and switches.
(a) Add oil to the liquid trough
(b) Liquid tank
The tank capacity is 400-500L. The medium is exclusive liquid for electric spark machining or pure kerosene. A special paper filter is connected in series with another oil filter in the oil circuit. The liquid
Pump is a single stage centrifugal pump with a high flow rate.
(4) Working principle
(5) Notes for operation
A. After the machine is installed, pour 400-500L of exclusive liquid for electric spark machining or pure kerosene in the tank.
B. Use of various valves and switches.
(a) Add oil to the liquid trough Oil should be injected into the liquid trough before machining.
(b) Inject oil to machining area
(c) Evacuate oil from machining area
(d) Replacement of paper filter cartridge
Main Technical Data
Electric Cabinet
Unit
60 ZNC
90 ZNC
Max. Machining Current
A
60
90
Max. Machining Speed
mm³/min
400
600
Min. Electrode Consumption Rate
0.1%
0.1%
Best Surface Roughness
μm
Ra0.8
Ra0.8
Power Consumption
kW
6
9
Weight
kg
200
250
Dimensions
mm
600×650×1800
600×650×1800

Type
D7145
Worktable Size
720×450mm
Work-tank Dimension
1400×710×410mm
X axis Travel
450mm
Y axis Travel
350mm
Z axis Travel
250+250mm
Distance between Electrode & Worktable
680mm
Max. Workpiece Weight
800kg
Max. Electrode Weight
80kg
Machine Weight
2000kg
Machine Dimension
1500×1500×2250mm