Improve the quality and performance of PDC cutter tooth at four explanation

Improve the quality and performance of PDC cutter tooth at four explanation

Auger teeth is indispensable in many coal mine machinery parts and components, in many coal mining will encounter in the process of hard rock. Will greatly reduce the service life of cutter tooth and abrasion resistance, so how to avoid? This paper from four aspects to detail how to improve the service life of rock auger teeth and abrasion resistance and the strength and impact toughness and thermal stability?
Method one: use diamond enhanced cutter carbide teeth, combining parallel diamond compact producing method, design a special way of pyrophyllite chorus block assembly, after acid, alkali pretreatment of diamond micro powder (W20 W40 + + W5 +) in the binder according to certain proportion after mixing, the carbide substrate loading according to strengthen column tooth shape processing of graphite mould, and vacuum processing, and then load the wax stones, using hydraulic press. And after cutting tooth, on the wear resistance and service life have greatly improved.
Method 2: thermal stability composite polycrystalline diamond cut teeth, because of its high temperature rise for carbide, carbide hardness drop caused by the temperature rise, wear faster, so we can take the heat stability of composite polycrystalline diamond cut teeth, it compared with traditional materials, from the traditional 70 mpa to 200 mpa, now than traditional cutting performance of 150 times stronger.
Method 3: optimization of cutting tooth geometry size, strengthening the protection of cutting tooth, because of its high cutting tooth stress place focused on tooth around the place, so pick shape cutter tooth is the main form of damage around the tooth, rather than the root. So the geometry size and shape of it is very important. Its diameter is too small, want to have enough strength, tooth profile should be broken rock, reduce wear and tear, cut tooth tooth size too small will be to increase the cut tooth conical part of the wear and tear.
Method 4: reasonable decorate cutter teeth and optimize the hole low breakage and pick on the cutting head of reasonable arrangement is very important, it involves cutting head broken rock effectively, improve the efficiency of broken rock, reduce the cutter tooth wear and damage, the vertical axis type of heading machine cutting head is small in size, so when the layout should strive to make each rock auger bullet teeth stress equilibrium, broken volume quite, achieve the best effect of mechanics; But also reduce the sliding and wear of cutter tooth, and at the same time by using low damage even, don't too much residual rock wall, should be on the horizontal and vertical coordinates when designing low broken figure, to check the broken effect, the optimization of cutter tooth arrangement.


PDC CUTTER FROM SIX STAR HARDMETAL