Slow wire machine belongs to high precision machining machine, can achieve several µm machining accuracy, surface roughness Ra can reach

Western slow wire process premise:

The slow wire machine has a process parameter library, and its process parameters are generally obtained by testing under specific conditions (such as workpiece material, electrode wire, temperature 20±3℃, humidity 40-80%, etc.). If the following conditions change or fail to meet the standards, the processing results may be biased.

1) Flushing specification: when machining according to standard parameters, the difference between the indicated value of the water pressure gauge and the theoretical value should be less than 0.5bar;

2) Workpiece and nozzle clearance: 0.05~0.10mm;

3) When the surface roughness requirements Ra≧0.35µm, efficiency oriented cutting wire can be selected (recommended to use the same type of wire as the machine tool). When Ra<0.35µm, galvanized="" wire="" that="" focuses="" on="" the="" surface="" can="" be="" used="" for="" processing="" in="" order="" to="" obtain="" a="" good="" surface.="">

4) When finishing, please ensure that the water is less than 10, especially when finishing, please follow the process parameter requirements. Replace resin or purified water if necessary.

The working principle of western slow 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