Several conditions leading to wire breakage of WED machine
Before machining with WED machine,check whether the welding wire shakes.In case of vibration,find out the cause and solve the problem before handling.
After wire calibration and before cutting,pay attention to whether the WED machine is in contact with the workpiece.In case of contact or uncertain contact,first turn off the high frequency,then start the water pump motor,and finally start the wire feeding motor,otherwise it is very easy to burn the electrode wire.
The guide wheel and bearing of WED machine are high-speed moving parts with a speed of more than 7000 rpm.During the machining process,the working fluid containing particles produced by melting and vaporization will penetrate into the bearing,resulting in wear of the guide wheel and radial or axial runout,thus affecting the roughness and accuracy of the workpiece surface.If the guide wheel is used normally,its service life is generally 3~6 months(calculated as 8 hours per day).
If the cutting surface of the workpiece produced by WED machine has sawtooth wave(there are three lines on the workpiece surface of high-speed and medium speed WED machine,one is black-and-white stripes visible to the naked eye,but does not affect the machining surface quality,which belongs to filament phenomenon),it does not belong to the problem of guide wheel bearing;One is the rectangular stripe,sometimes high and sometimes low,which belongs to the problem of improper welding wire and parameters.The other is serrated stripe,which is the problem of guide wheel or bearing.
If the electrode wire of WED machine machine shakes seriously and is accompanied by bearing runout noise,the guide wheel shall be replaced.Note:the upper and lower guide wheels and bearings must be replaced together.During replacement,the WED machine shall be filled with high-speed grease,which will affect its service life.The bearing must have good sealing performance.When replacing the guide wheel for assembly,all relevant parts and tools shall be cleaned with kerosene,preferably gasoline.
Regularly check whether the contact between the conductive block of WED machine and the electrode wire is good and reliable.If the contact is not good,it will directly affect the stability of the machining process and easily cause wire breakage.Due to the friction and conductivity of WED machine,the conductive block is easy to produce grooves.Therefore,during cutting,the relative position of welding wire and conductive block shall be adjusted in time to prevent ignition between welding wire and conductive block.
The above is about several situations that lead to the disconnection of WED machine.For questions about the use,you can directly contact Suzhou tyrant.We will arrange professional staff to answer your questions.
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