Makatora D. Parametric synthesis of the machine working bodies for slitting shoe materials

The thesis is devoted to parametric synthesis of the machine working bodies forslitting shoe materials with the purpose to increase productivity, reduce power expenses for process of slitting shoe materials. It has been proved that the use of a knife with a single-edged blade allows to reduce the resistance force for moving the separated parts, as compared to the double-edged blade of a knife. Some analytical dependencies have been obtained to determine the design parameters of the device for adjusting the location of the blade edge. It has been analytically proven that the use of a knife with an arc shaped cross section reduces the tensile force and friction force during slitting. Some analytical dependencies have been obtained to calculate the geometrical parameters of a corrugated knife with a one-sided cross section. The minimum diameter of the conveyor rollers has been determined in the machine basic construction, as well as with the combined lower conveyor roller and the loading device. Some analytical dependencies have been obtained to determine the design parameters of the machine. The influence of the difference in friction coefficients between the detail material and the conveyor belt on the design parameters of the loading device has been investigated. There has been experimentally confirmed the reliability of the analytical dependencies obtained for determining the design parameters of the machines with a knife with a single-edged blade. The difference between the results has been up to 10%. The slitting line traction for micro porous, monolithic rubber and felt has been experimentally determined. Experimental studies have confirmed the reliability of analytical data on the use of a knife with an arc shaped cross section and a corrugated knife with a one-sided cross section, which will reduce the amount of losses in slitting compared to a knife with a one-sided cross section by 14 % and 8.6 % respectively reducing the forces of resistance to advancement of a detail at slitting in comparison with a knife with a single-edged blade. New designs of machines for slitting shoe bottom details have been developed, mathematical dependencies have been obtained for the calculation of their structural parameters, and diagnostics methods of the technological level of the enterprise’s production processes which allows to implement innovation and technological transformations at the enterprise level.