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LOAD CALCULATION TECHNIQUE FOR VERTICAL FEED DRIVE OF CURVE STRIP SAWING MACHINE



The current situation in the stone cutting industry is described, and the significant role of stone sawing machines in the production process is emphasized. The design and operating principle of a curve strip sawing machine are characterized. The curved trajectory of sawing is one of the most efficient techniques from the viewpoint of productivity and wear resistance of the sawing tool. On the other hand, the machine drive is subjected to high dynamic loads in this case, and the machine systems suffer from numerous failures. Such systems are the saw frame and vertical feed drive. Frequent failures take place in slide nuts, gear wheels, tooth wheels, bearings, shafts, couplings, electric motors, etc. Aimed to reveal and exclude the causes of failures, the load calculation procedure is developed for the saw frame and vertical feed drive of a curve strip sawing machine. The key elements in the calculation of loads in the vertical feed drive of the saw frame are actuating screws and slide nuts. The sequence of calculating loads in these parts is set. The dependence of the loads on the pendulum gear tilt angle and the machine run time is determined. The torques of the actuating screw and other units of the vertical feed drive are found, the curves of the torques, pendulum gear tilt angle and machine run time are plotted and analyzed. This procedure is only applicable to a rigid system of transfer members. The obtained relations are required for the strength analysis of transfer members to determine optimal dynamic parameters, operating conditions and design values of sawing machines.

: 2
2019
ISBN: 622.022
DOI: 10.25018/0236-1493-2019-02-0-136-145
Authors: Sekretov M. V., Gubanov S. G.

Authors' Information:
Sekretov M.V., Candidate of Technical Sciences, Assistant Professor,
e-mail: msekr@yandex.ru,
Gubanov S.G., Senior Lecturer,
National University of Science and Technology «MISiS»,
119049, Moscow, Russia.

Key words:
Strip sawing machine, saw frame, curve sawing trajectory, actuating screw, slide nut, vertical feed drive, transfer members, dynamic loads.

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