How to deal with the “filigree” phenomenon of medium wire cutting machine tools
Release time:
2024/01/25
How to deal with the “filigree” phenomenon of medium wire cutting machine tools
How to deal with the phenomenon of “filigree” encountered in the daily use of medium-distance wire cutting machine tools?The following Xiaobian will give you a brief introduction.
The cause of the phenomenon of “filigree” in medium-distance wire cutting machine tools：
Because it cannot be effectively deionized to form a continuous arc discharge, the resistance heat of the arc of the wire cutting machine tool precipitates a small amount of carbon to form fine carbon particles, and the molybdenum wire itself is also carbonized.One of the three is that the workpiece is thicker (long discharge gap), the dielectric coefficient of water is low (poor recovery insulation), and the pulse source has a DC weight (greater than 10mA) that delays arc extinguishing. These three are the basic conditions for the “filigree” scene.An “impurity” brought in (or inherent in the workpiece) in the discharge gap that affects the spark discharge is the cause of the “filigree” phenomenon.“Filigree” is the same as the arc-drawing burn of spark electric discharge machining. Once the arc-drawing burn in the gap is formed, the workpiece and the electrode will be burned out of the pit at the same time and form carbon fine particles. If the carbon fine particles are not cleaned, they cannot be processed.When the small carbon particles stick there, they will be burned by arcs, and the area will become larger and larger, and there will be no ability to remove them by themselves.If the workpiece and the electrode are displaced, each and the opposite side will cause new arc burns, one place will change to two places.The only way is for people to liquidate, and the line cutting can be done as a force.
Analysis and treatment of the ”filigree" scene of medium-moving wire cutting machine tools
After a period of cutting, dark spots will appear on the molybdenum wire for a period of time. The dark spots are usually a few to ten millimeters long, and the dark spots are usually a few to tens of centimeters apart.Dark spots are arc discharges that continue over a period of time, burn and carbonize.After thinning, brittleness and carbonization, it is easy to break.Dark spots form black spots on the silk tube, and sometimes they are arranged in a certain order to form patterns, so they are called "filigree”.
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