Wire EDM DK7740

The economical type wire cutting EDM DK7740 is unique and original from China; it is widely used in mold, accurate components manufacturing industry. DK7740 uses molybdenum wire as electrode wire. This type wire cut EDM is different from brass wire cut EDM which is widely known in the world. Molybdenum wire type wire cut EDM is much cheaper than brass wire cut EDM, and can replace many jobs of latter one. Kingred’s economical type wire cut EDM machine is featured:
1) Adopt KDXP(AutoCUT) CAD/CAM software, Windows XP as operating system, easy to use and maintain;
2) use Resin sand casting technology make casting of DK77 series, twice High temperature tempering treatment to remove inner stress to reduce possibility of deformation;
3) digitalized electrical circuits that controlled by inverter, to realize smooth motion of wire feeding;
4) large thickness and high efficiency high frequency power source;
5) adjustable feed speed of wire drum, low speed for loading wire and high speed for machining. DK7740 has table travel 400×500mm, it is suitable to cut all kinds of conductive material, if you are looking for a medium size and cheap Wire Cutting EDM Machine, DK7740 would be your perfect choice.

Wire EDM DK7740

• Wire EDM DK7740 Technical Parameters

  Item		Unit	DK7740
  Travel of X/Y		mm	400×500
  Table size		mm	500×785
  Max. cut thickness		mm	300 or 500
  Cut taper/thickness		°/mm	±3° or  ±30°/100
  Wire frame			Adjustable
  Cut accuracy		mm	≤0.015
  Max. cut speed		mm2/min	160
  Best finish	Once cutting	Ra ≤ μm	≤2.5
  	Multi-cutting		≤1.5
  Wire diameter		mm	Φ0.12-0.25
  Max. electrical current		A	6
  Power		Kw	<2
  Voltage		V/Hz	3 phase 380V/50Hz or 220V/60Hz or 415V/50Hz
  Max load of table		Kg	500
  Weight of machine		Kg	2000
  Dimension (L×W×H)		mm	1700×1350×1700

• 

  As show in above figure, AutuCUT is a whole integrated solution for wire cut EDM machining. AutoCUT system is consisted by AutoCUT software, PCI based drive card, and high stabile main board of stepper motor drive, and 0.5 microseconds medium speed wire cut EDM high frequency main vibration board. AutoCUT software includes AutoCAD embedded module and cutting control software.

  Main function of AutoCUT:

  1. Support graph drive automatic programming, there is no need for customers to touch codes, only need to set cutting technology to the graph for cutting; at the same time, it support 3B or G code list created by other wire cut EDM software, and simply read and process to do cutting.

  2. Software is embedded in AutoCAD, CAXA and some other software, customers just need to know AutoCAD or other design software, easy to use and no need for special training of drawing.

  3. Several machining pattern combined together in cutting(continuous, single segment, forward, backward, trace back and so on.).

  4. XYUV four axes direction change is adjustable, drive motor could be set as 5 phase 10 beats or 3 phase 5 beats and so on.

  5. Real time monitoring upon X, Y, U.V and cutting situation.

  6. Machining preview, real time display of cutting process; 3D display and tracking of taper machining, zoom in and zoom out to view graph, front view, right view, top view and etc..

  7. Capability of multi-time cutting with customer maintained data base of cutting parameters, make multi-time cutting much more easy and reliable.

  8. Taping cutting adopts 4 axes simultaneous technology, can process up and down different shape cutting convenient.

  9. Control board to drive 4 axes movement, work stably and reliably.

  10. Support several cards work together in parallel , several wire cut EDM machine could be controlled by only one computer and do cutting at the same time.

  11. With automatic alarm function, it will alarm when cutting is done or malfunction happens, time of alarming is settable.

  12. Support angle clear time-delay, time delay when cutting angle of track, to make avoid impact of deviation caused by molybdenum wire.

  13. Support compensation of teeth gap of screw to increase mechanical accuracy.

  14. Support linear scale and closed- type with servo motors to increasing positioning accuracy of machine.

  15. Support three different cutting pattern: normal high speed wire cut EDM machining, medium speed wire cut EDM coding output pattern and output pattern.

  16. Power off memory function, cutting data backup after recover of power supply, re-track when short circuit happens and malfunction handling.

  17. Automatic power off after machining is done.

   

  Main features of AutoCUT system

  1. It adopts graph drive technology, reduce work of man and increase working efficiency, and minimize error caused by workers.

  2. Open to various version of WindowsXP, software is easy to learn and use.

  3. Directly embedded in AutoCAD, CAXA and may other CAD software, to realize CAC/CAM combined smoothly to prolong cutting range.

  4. Taper cutting; 4 axes simultaneous technology; 3D design and cutting track; compensation to diameter of guide, diameter of electrode wire, and big tap cutting.

  5. Multi-cards work simultaneously is supported. It is possible to control many wire cut EDM machines with only one set computer, which has many pieces AutoCUt PCI card.

  6. It has data base of cutting parameters which is editable by operators, who can save, edit and read cutting parameters according to different material, different thickness and different needed cutting performance.

  7. AutoCUT can optimize processing of super thick workpiece(up to 1000mm) cutting, to make track stable and reliable.

  

  

  

  

  

  

  

  

  

   

• 	Controller structure and layout Adopt Germany design and manufacturing technology to design and build high performance controller with good stability, use good quality material to build control body and fixture components, simple and good looking, reasonable layout of electrical circuits. Good heat dissipation ability. Electrical components are all supplied by famous manufacturer. Contactor: SHIHLIN ELECTRIC & ENGINEERING COOPRATION(TAIWAN) Inverter: SANCH(TAIWAN) Electrical relay: OMRON(JAPAN) Switching power supply: MEANWELL(TAIWAN) Capacitance: HITACHI(JAPAN) Computer: TSINGHUA TONGFANG(China)
  	Computer: Brand TSINGHUA TONGFANG Hardware: P4 or better CPU; 1GB memory; 160G hard drive 15" LCD motor; Industrial use stainless steel keyboard; Internet accessory available WindowXP Operating System
  	Adopt digital high impulse power, the impulse power is controlled directly by AutoCUT card connect to PCI slot of computer with WindowXP operating system, it improves accuracy and stability of impulse signal, and reduces malfunction ratio of impulse power, and improves cutting efficiency and surface quality obviously. Max cutting current is 6A, Max cutting efficiency is more than 150mm2/min, best surface finish Ra≤1.2um. Modularization design of inner electrical circuit to simplify circuit layout to reduce malfunction ratio and makes it is much easier to judge of malfunction when it happens.
  	Control system: Adopt AutoCUT CAD & CAM system with AutoCAD imbedded function, make programming much more easier if operator use of AutoCAD, with cutting data base which can be edited by operators, who can improve cutting performance with experience based on use of wire cut EDM. No physical buttons on control panel, this design simplify wires connection of control panel; all buttons are designed in the software of AutoCUT, makes operation much easier and reduce malfunction caused by physical buttons on control panel.

• Reusable molybdenum wire cut EDM machine is original from China, it is also named as high speed wire cut EDM machine. The basic principle of wire cut EDM is that a thin metal wire, usually molybdenum wire for reusable electrode wire type wire cut EDM, is fed through the workpiece, flushing with cooling fluid, to get needed shape of workpiece. Wire cut EDM is typically used to cut metal workpieces with thickness range from 2mm to 500, more than 500mm for machine models. It can make punches, tools, dies, molds and other precision parts from hard materials that are difficult to machine with other metal processing equipments.
  Adopt multi-time cutting technology at the base of high speed wire cut EDM machine, medium speed wire cut EDM machines are widely accepted by the market in past years, comparing with regular high speed wire cut EDM machine, thanks to multi-time cutting technology, surface finish of medium one is much better, could be around 1μm. There is no need grinding process for parts cut by wire cut EDM machine anymore.
  Kingred’s advanced “C” structure wire cut EDM, high precious linear guideway and ball screw, with multi-time cutting technology, cutting accuracy and surface finish of Kingred’s machine is approaching to Brass wire cut EDM’s much more closer. To some degree, for most of cutting works, Kingred’s wire cut EDM machine is able to replace brass wire cut EDM machine.
  Molybdenum wire cut EDM machines are widely used in mold king, electrics, precious machinery, auto components, army industry and etc.,