Simulation curves of scooping and digging grab

Moscow State University of Civil Engineering, Yaroslavskoe shosse, 26, Moscow, 129337, Russia

^* Corresponding author: cil@bk.rug

Abstract

The article deals with a brief description of the purpose and scope of the exchangeable working equipment on cranes and excavators. It is shown that two-leaf rope grab during the cycle can scoop loose material or excavate the ground with digging. In the latter case, the edge of the leaf is equipped with teeth and the specific mass of the bucket per cubic meter of its capacity should be much heavier than with scooping.. An apparent discrepancy between the curve needed for obtaining the greatest grabbing of loose material or ground, i.e., a geometric curve that does not take into account the operational factors of the process, and its actual curve is revealed. In the case of working on the ground, it is called the trajectory of digging. The introduction of the concept of “simulation curve” is an innovative moment in the work. It means the trajectory that adequately adapts the actual geometry of the scooping trajectory or the digging one. The method of geometric construction of the scooping trajectory and the digging one without operational factors is provided.. The method of constructing adequate simulation curves and calculating the volume of portions of material when scooping or digging is outlined.