Working principle of slow walking wire:

Slow-moving wire is a kind of machining machine tool which uses continuous moving fine metal wire (called electrode wire) as electrode to carry out pulse spark discharge on the workpiece to remove metal and cut into shape. The phenomenon of light voltage discharge in loose contact between the on-line electrode and the workpiece during slow wire processing. When the flexible electrode wire and the workpiece close to the commonly considered discharge gap (such as 8 ~ 10μm), no spark discharge occurs, even when the electrode wire has been in contact with the workpiece, can not see the gap from the microscope, also often can not see the spark, only when the workpiece electrode wire top bending and offset a certain distance (a few microns to tens of microns) when the normal spark discharge occurs. At this time, when the wire electrode is fed 1μm, the discharge gap does not decrease by 1μm, but the electrode wire increases the tension between the wires, and the workpiece increases the lateral pressure. Obviously, only when the electrode wire and the workpiece maintain a certain slight contact pressure can spark discharge be formed. It is concluded that there exists some kind of electrochemically generated insulating thin film medium between the electrode wire and the workpiece.

Slow wire processing efficiency:

(1) High processing efficiency

Due to the development of ns high peak current pulse power supply technology and detection, control and anti-interference technology, the processing efficiency of low-speed wirewire EDM wire cutting machine is also improving.

(2) Processing efficiency of large thickness workpiece

When cutting 300 mm thick workpiece, the processing efficiency can reach 170 mm2/min. This is a very practical technology improvement.

(3) Processing efficiency of workpiece with thickness variation

Automatic detection of workpiece thickness, automatic adjustment of processing parameters, prevent wire breaking, to achieve the state of high processing efficiency.