的boththe优势和PDC钻头，更多的三牙轮钻头比双方实力andductility三牙轮钻头大编队，但也可以适用于PDC钻头难以todeal硬夹层和其他复合物的形成。

虽然仍在模三牙轮钻头例如，useof事情要领，处理速度快，紧张等因thesituation的故障一直选择。 例如：模具张力失败situationis边缘磨损，我们必须选择硬度高，耐磨性好的材料; 冲压模具所受张力循环荷载，容易导致外观offatigue裂纹，造成表面脱皮，然后选择看起来不错toughnessmaterial; 拉丝模应选择摩擦材料国税发尤其系数低; 压铸模由于循环热应力，故应选择材料的astrong热疲劳; 处理注塑模具，在和谐社会的三个牙轮钻头，模具材料可选的预硬化淬火和temperedsteel，当塑件的光洁度高，transparentmaterial，可选耐腐蚀不锈钢，当商品largequantities，你可以选择 调质钢。 此外，它isnecessary考虑模具materialsmaller亲和力的接受和其他地区加强防粘模具零件磨损，从而影响模具的thequality。

密封与润滑

该advancedmetal密封包装由两个金属阀座和两个弹性激发器。 压缩增能保证良好的接触被保存在两个密封面ofmetal环通过弹性力，并实现了轴承密封。 在钻井，金属密封是相对动态的，而激发器是静态的。 此willimprove轴承密封件的可靠性和耐久性。 该pressurecompensator系统和先进的油脂能大大提高lubricatingreliability。

Tricone rock bit of boththe advantages and PDC drill bits, tricone bit more than for both strength andductility are large formations, but also can be applied to PDC bit difficult todeal with hard interlayer and other complex formation.

While still under the mold tricone bit example, the useof things essentials, processing speed, tension, etc. due to failure of thesituation has always been selection. For example: Die tension failure situationis edge wear, we must select high hardness, good wear resistance material; stamping die tension suffered cyclic loading, easy to cause appearance offatigue crack, causing the surface peeling, then to choose looks good toughnessmaterial; drawing die should choose particularly low coefficient of friction ofthe material; casting mold due to cyclic thermal stress, it should choose astrong thermal fatigue of the material; deal with injection mold, when thethree-cone drill, the mold material optional pre-hardened quenched and temperedsteel, when the plastic parts for the high-quality finish, transparentmaterial, the optional corrosion resistant stainless steel, when largequantities of goods, you can choose quenched and tempered steels. Also it isnecessary to consider the acceptance and other parts of the mold materialsmaller affinity to intensify anti-sticking mold parts wear, thus affecting thequality of the mold.

Seal and Lubrication

The advancedmetal seal package consists of two metal seats and two elastic energizers. Compressed energizers ensure good contact being kept on two sealing surfaces ofmetal rings by elastic force, and achieve the bearing seal. In the drilling, metal seal are relatively dynamic, and the energizers are static. This willimprove the reliability and durability of bearing seal. The pressurecompensator system and advanced grease can greatly increase the lubricatingreliability.