In electrical machining and cutting, high temperature resistant metal wire is needed to cut and shape the product. Pure molybdenum wire is used for high temperature electric furnace and electric discharge machining, not only for wire cutting processing; molybdenum sheet is used for radio equipment and X-ray equipment; molybdenum is resistant to high temperature ablation, and can also be used for manufacturing tungsten wire bracket of fire arrow nozzle and electric bulb. In many fields, molybdenum wire used as electric wire is a favorite consumable material in many electric processing industries. It is much more affordable than silver wire and copper wire in price. However, as an electric wire, molybdenum wire is superior to silver or copper in tensile strength and high temperature resistance. In terms of ductility, after years of process experience, wire cutting molybdenum wire has been developed It's improved a lot, reduced a lot.
In the process of wire cutting, the phenomenon of molybdenum wire breaking is not uncommon. Next, we will analyze the following several major phenomena that affect the broken wire of electric wire
In the process of the tension and wire speed on the impact of molybdenum wire cutting, the greater the jitter, the more likely to produce broken wire. Increasing the tension of molybdenum wire can reduce the impact of wire vibration, thus improving the accuracy and cutting speed. Generally, the tension is appropriate in 12-15n. The increase of wire speed is conducive to the molybdenum wire to bring the working fluid into the discharge gap of the workpiece with larger thickness, so as to ensure the elimination of the electrochemical corrosion products And the stability of EDM. However, if the speed of wire 4 is too high, the molybdenum wire will shake seriously, which will destroy the stability of processing, and the machining accuracy and surface roughness will become worse, and it is easy to cause wire breakage. When the wire speed is too low, it is easy to break the wire due to large loss. Generally, it is better to be less than 10m / s. If the high-frequency power supply is not cut off during the reversing of the wire carrier, the molybdenum wire will burn due to high temperature in a short period of time. Therefore, it is necessary to check whether the travel switch after the bobbin fails. It is necessary to keep the flexible rotation of the wire conveying cylinder and guide wheel, otherwise the vibration of the wire guide system will be caused during the round-trip operation and the wire breakage will occur.
