The influence of design and technological factors on the durability of the installed carbide explosion equipment of three-cone drill bits

Aim. In the study learning trial was made to make a mathematical model of assembling process in connections " tungsten carbide insert cutter - cone", while methods statistics were applied. This makes it possible determine parameters distribution closing link. Accordingly, tension is determined by samples constituent links. For this purpose, amount investigated. Tension affects change stress, which characterizes accuracy assembly on strength connection cone ". Depending magnitude pressing force, customary estimate connection. Method. The analysis and holes layers bit established that size errors component links dimensional chains are distributed according laws they similar normal law random variables. test carried out criteria Pearson Kolmogorov Results. increase force with an due elastic deformation both cemented layer core rolling-cutter row. extreme nature dependence for has been established. dependence, as characteristic connection, can be used design technological operations roller bits steels different indicators. Scientific novelty. made. It link tension, based dependencies reasonably most accurately approach formation selective groups teeth marking them. Practical significance. appointment tensions, value exceeds point, causes occurrence unfavorable plastic or destruction shell (which conjugated along height shank cutter). They also result irrational stresses body cutter. values have greater influence into steel 9310H (USA), when its hardness Rockwell 59-60 compared 48-50. Within limits studied values, linear.