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Multiple cutting can be achieved. The significant difference between medium wire cutting and fast wire cutting is that multiple cutting can be achieved. The purpose of multiple cutting is to improve the surface quality and meet the needs of processing workpieces, thereby expanding the scope of application.after three cuttings, the surface roughness of the medium wire cutting machine tool reaches Ra≤1.2μm.
The requirements of multiple cutting on the mechanical accuracy, repeat positioning accuracy, stability of the wire feeding system, performance of the pulse power supply, conductivity of the working fluid, and process database of multiple cutting are much higher than those of ordinary HSWEDM machine tools.
Breakthroughs in pulse power supply. In order to achieve multiple cutting and ensure processing efficiency, the cutting speed during rough processing must be increased, which requires close cooperation with the pulse power supply.
According to the development of power electronics technology, the pulse power supply has been improved and the current limiting resistor has been eliminated. In this way, the performance of the pulse power supply is improved and energy is saved.
At present, the maximum cutting speed of the medium-speed wire cutting pulse power supply is close to 200mm2/min, and the average speed of multiple cutting (for example, three times) can reach about 60-80mm2/min; moreover, the effect of extremely low electrode wire loss is achieved. Therefore, some are called intelligent high-frequency pulse power supplies.
Control system Medium-speed wire cutting mostly uses an industrial PC to form an integrated programming control system. Combined with the process database, the system can provide the best processing conditions to achieve high-speed processing, quality assurance, and simplified operation.
After the user enters the processing conditions (material, thickness, etc.) and process parameters (surface roughness, etc.), the system can give appropriate electrical specifications (pulse width, pulse interval, no-load voltage, processing voltage, processing current, etc.), as well as servo feed speed, electrode wire speed, etc. for each processing, and make appropriate responses during processing.
Therefore, the control system requires close cooperation between the pulse power supply and the machine tool electrical system. Some people also call this type of machine tool "intelligent multi-speed wire cutting machine tool".
Machine tool circuit In order to meet the different requirements of each cutting, the wire feeding speed of the electrode wire can be adjusted, and AC variable frequency speed regulation is a common method.
In this way, electronic logic circuits can be used instead of relay control circuits, which also facilitates the interface with the control system and facilitates the control of the wire feeding speed.
After the variable frequency speed regulation is adopted, the commutation impact of the wire feeding motor is also reduced, which is conducive to maintaining the stability of the electrode wire.
Improvement of machine tool mechanical accuracy and others In order to ensure the effect of multiple cutting, the machine tool must have a high repeat positioning accuracy, which has certain requirements for the bed, guide rails, etc.
The measures taken include: designing a suitable structure, selecting suitable materials, using linear guide rails, and using gapless gear pairs or motor direct drag to eliminate gaps in the feed system, so as to maintain the accuracy and durability of the machine tool.
CNC wire cutting machine tools can be classified according to the cutting machine tools. One is classified according to the wire speed, which can be divided into the cutting machine tools of slow wire walking test, medium wire walking and high-speed wire walking. As the CNC wire cutting machine tools used by enterprises for processing, they are mainly selected according to the specific production process and the workpieces to be cut.
According to the characteristics of machine tool processing, it can also be divided into standard cutting machine tools and various non-standard machine tools, as well as ordinary straight wall cutting machines and taper cutting machines.
According to the form of pulse power supply, it can be divided into RC power supply, transistor power supply, grouped pulse power supply and more adaptive control power supply cutting machine tools.
Aluminum
Aluminum has excellent thermal and electrical conductivity properties. Aluminum is naturally soft and can be challenging to cut with the process as it may result in a gummy build-up after machining.
Titanium
Wire EDM cutting is perfect for titanium because the process can withstand the stickiness of this alloy and break up lengthy chips. You need deionized water as the dielectric medium to help control heat generation during machining.
Steel
Steel is a very strong metal. many manufacturers favor using a wire EDM machine over a CNC machine.the material generates a lot of heat, so one needs to take the necessary precautions.
Brass
Brass is easy to cut using the machine because it has high tensile strength.the cutting speed should be slow because it is a soft metal.
Graphite
It may be difficult to cut graphite using conventional cutting tools. But the wire EDM process is appropriate because the wire is sharp, preventing particle pull-out.
Electronics
Used for producing components such as connectors and circuit boards.
Automotive
Ideal for creating parts like gears and brackets with high precision.
Aerospace
Essential for manufacturing critical components that require strict adherence to specifications.
Medical Devices
Employed in producing intricate parts for surgical instruments and implants.
It is strictly forbidden for the body to go over the safety protection device during the operation of the middle wire EDM machine.
The safety protection devices such as the wire transport assembly and the workbench cannot be opened during the wire transport and processing of the middle wire EDM machine. At the same time, warning signs are marked on the corresponding protection to remind you to pay attention to safety when using it.
It is strictly forbidden for the body to touch the electrode wire during the operation of the medium wire EDM machine to avoid accidents.
It is strictly forbidden to open the electrical appliance door during the operation of the cnc wire cutting machine and when the electrical cabinet is energized to avoid accidental electric shock.
The coolant can not be disconnected for a long time during the processing, not to affect the processing speed and processing accuracy of the wire EDM machine and damage the molybdenum wire at the same time.
The electrical appliances of the wire EDM machine are equipped with a mushroom emergency stop switch. In case of an emergency, you can press the emergency stop switch.
The wire EDM machine should be protected from lightning strikes, and lightning protection devices should be installed.
There is no interlocking relationship between the wire EDM machine protective cover and the machine start. Please pay attention to using the protective cover during processing.
The power supply must be cut off during the maintenance and warranty process.
Wear protective tools during installation and removal to prevent injuries to hands and feet.
The workpiece of the washing line cutting machine must be in the designated position, and protective tools such as goggles, masks, and non-slip shoes must be worn.
If an abnormality occurs, such as abnormal noise, smoke, vibration, odor, etc., the machine should be shut down immediately, and the relevant personnel should check and deal with it.
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