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drawing die

1. drawing die choice questions:
         We generally use drawing dies ( can not say  tungsten die ) , outer diameter is 25mm, thickness 8mm, 10mm, 12mm , etc. different thickness , the thicker the wire thickness is chosen relatively thick wire drawing dies . However, we do not know whether to note that some of the drawing die lathe side there is a circle around the trench , while others do not . Why is this ? This is a special manufacturer of drawing dies provisions represent a marker drawing die material , there is an artificial polycrystalline diamond groove , no groove is shining through tick natural diamonds. Why did I make this it ? Because of this relationship we are the right choice drawing die a very important one basis . Although the hardness of artificial polycrystalline dies itself is very low, but because there are numerous tiny polycrystalline surface pits , these pits is more conducive to drawing oil storage final form in drawing die face has become a film, this layer film isolated copper direct contact with the mold , and ultimately more wearable artificial polycrystalline die , higher service life than natural diamonds . Heaven diamond surface was mirror, brushed oil can not form a film on the surface , so the natural diamond dies easier to wear.
      So how do we choose mold it ? Very simple . Direct summarized it:
  Artificial polycrystalline die ----------- more than 0.10mm diameter wire ; hard material , such as brass wire , copper clad steel , nickel-plated wire ; drawing less demanding conductor surface
  Natural diamond dies --------- 0.10mm or less , demanding brushed finished surface , soft wire
2. a description of important areas drawing die .
   The diamond wire drawing dies into the entrance area , lubrication zone , compression zone , sizing area, decompression zone , exit zone a total of six areas. I'm here to remind lubrication zone and compression zone , lubrication areas are generally angle of 50 degrees, the compression zone angle of 12 - 16 degrees, I have not met a lot of Dianxian drawing mold maintenance and testing the ability of drawing dies in the end do not know whether has been broken . Drawing dies after prolonged use without timely maintenance, resulting in far more than the design diameter aperture , but also caused severe compression zone drawing die wear , eventually leading to the compression zone angle becomes larger, also touched lubrication corner , eventually leading to breakage or produce peeling phenomena ( drawing machine lid open , you will find some dies entrance suddenly accumulate a lot of copper ) ------ I am here to tell you that if you plant this happens , state your mold maintenance too late , but also tell you the importance of dies maintenance , such severe wear of the drawing dies , is difficult to maintain the original dimensions and angles
 3 . wire drawing dies decompression zone in particular: drawing die in the compression zone and sizing zone, copper has been a great compression, decompression when the copper wire in the end zone, large diameter copper wire , copper wire directly on the surface contacts with the decompression zone , if your drawing die decompression zone is too rough, the direct result of the copper surface scratches . This especially careful. Here also have to mention the tin molds, exports also should pay attention to this problem, because for a long time tin, tin-plated die exit accumulate in hard powder , affecting tinned wire diameter and roundness . Therefore , tin exports should regularly clean out the mold adhesion of the powder . Clean way is to use a small wind mill with grinding to clean up, be careful not to hurt the diamonds.

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