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Precision hardware processing process instability solution
Editor:Hangzhou Fuyang Zhongrui Precision Hardware Processing Co. LTDDate of issue:2019-05-20 16:07 Number of visits:
Aluminum is a common material in life. Our home windows, sliding doors, and kitchen basins all use aluminum alloy. It can be said that it runs through all of our lives, and it is also a common in precision hardware processing. Because of its soft material, the material needs to overcome its shortcomings of softness and deformation during processing. In particular, when machining on an in-line cutting machine is required, the problem of distortion and short circuit of the cutting track is liable to occur.
When machining online cutting hardware, the larger the thickness of the workpiece, the more difficult it is to cut. Because the workpiece to be cut reaches a certain thickness, there is not enough coolant to enter the precision parts, so that it cannot eliminate the electricity in the gap. The eclipse is generated, which causes the precision machining process to be extremely unstable until a short circuit with current and no discharge occurs. So how to avoid this?
First of all, it is necessary to optimize the process parameters and formulate different process parameters according to the workpieces of different thicknesses. When processing aluminum precision hardware, the width of the pulse can be appropriately reduced, in order to reduce the discharge amount of a single pulse. Therefore, the trace of the discharge is also reduced, so that the number and size of the particles of the alumina can be reduced to a large extent, thereby reducing the wear of the feed block, and the relative increase of the gap between the pulses can be made. The chip removal is more convenient, thereby reducing the sticking phenomenon, improving the stability of the wire cutting, and improving the surface roughness of the processed precision parts and improving the processing quality of the precision machine parts.
On the other hand, if the gap of the pulse is too small, the product of the discharge cannot be eliminated in time, which will result in the elimination of the ionization of the discharge gap in time, resulting in instability of the wire cutting hardware, resulting in distortion of the broken wire or the cutting track. .
When setting the feed speed, if the set speed is lower than the actual possible erosion speed of the workpiece, the machining state will be easy to open, and the speed of wire cutting precision machining will be slowed down, while the aluminum part itself has a lower melting point. Under the discharge energy, the amount of etching of the processing is relatively large, resulting in an increase in the discharge gap, and the pulse voltage cannot break down the medium of the liquid between the electrodes in time, thereby reducing the utilization rate of the pulse, resulting in precision mechanical parts. The processing process is unstable and even causes the wire breakage phenomenon; when the feed rate of the device is greater than the actual possible erosion speed of the workpiece, the short circuit phenomenon is likely to occur during processing, which will cause the actual feed and cutting speed to decrease. Moreover, it is not conducive to the elimination of the electric corrosion of the aluminum material, thereby causing the phenomenon of wire breakage and short circuit, so the reasonable adjustment of the feed frequency can make the precision machining process smoother.