Increasing the productivity of the felling-and-bunching machine LP-19 by improving the trajectory of the working tool

Currently, there is a clear need for domestic logging equipment. The industry employs 1.5 thousand felling-and-bunching machines, including felling-and-bunching machine LP-19 and 3.5 thousands of other devices, both of domestic and imported origin. Most of the machines have been in operation for several decades and require replacement. The machine fleet is updated by about 3 percent per year, and the wear rate during logging operations exceeds 53 percent. This fact requires thorough work to develop import-substituting equipment. The paper presents a feasibility study of a developed integrated device usage for trajectory control of a handle, boom and working body of felling-and-bunching machine LP-19. Using the developed integrated device provides a relative reduction of verticality deviation of the working body with horizontal boom movement in the range from 150 to 160 % compared with the basic felling and bunching LP-19 machine configuration. It has been experimentally established that the use of the developed integrated control device provides a reduction in the time of the guidance operation of the working body (changing the boom outreach) from 13.2 s up to 7.7 s. The author has experimentally established that when using the developed integrated control device the average production time of 1 m3 of wood is less than that of the basic machine, which allowed increasing the productivity of felling and bunching LP-19 machine by 17%.