Calculation of the work resource of the drive mechanism of a pressure plate in a die-cutting flat press

One of the main problems for reliable, efficient and uninterrupted operation of flat die-cutting presses in their creation and improvement is considered, namely, the importance of calculating of the work resource of the drive mechanism of a pressure plate. The flat die-cutting presses of various designs are given, in which strictly vertical movement of a pressure plate is provided; the scheme of the flat die-cutting press and the description of the principle of its work, the drive mechanism of which contains a cam and rollers; requirements for the materials from which the cam and rollers are made. Experimental researches for definition of technologically necessary efforts of die-cutting in die-cutting presses are analyzed. One of the basic efficiency criteria of the drive mechanism of a pressure plate in a flat die-cutting press is established. The method of theoretical calculation of the drive mechanism of a pressure plate in a flat die-cutting press is offered, which contains a cam and rollers, which involves determining the wear intensity and the wear thickness for a certain period of time the contact surfaces of the cam and rollers; determining the work resource of the drive mechanism before the violation of the geometric dimensions and the correct shape of the cam and rollers, which causes unstable operation of the flat die-cutting press and makes additional dynamic loads. The above technique can be useful in solving practical problems, in particular to determine the wear intensity, the wear thickness and the work resource of the drive mechanism of the pressure plate in a flat die-cutting press depending on the torque of the drive cam and the selected material from which the cam and rollers are made.

Keywords: die-cutting, cardboard packaging, flat die-cutting press, intensive wear, wear thickness, work resource.

doi: 10.32403/1998-6912-2021-1-62-105-114