| Author(s) | Collection number | Pages | Download abstract | Download full text |
|---|---|---|---|---|
| Kobryn L. Y. | № 2 (69) | 151-158 |
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The purpose of the work is to provide better conditions for the design of a rational structure of the improved drive mechanism of the pressure plate of the flat-bad type die-cutting press by determining the kinematic and kinetostatic parameters of the mentioned drive.
Die-cutting of cardboard blanks is one of the key operations in the production of packaging and containers, which ensures high quality of manufactured products. The technological operation is performed using die-cutting presses, where the packaging blanks, placed on a pre-printed sheet, are cut out. One type of the presses is a machine where a pressure cylinder rolls over a printed cardboard sheet placed on a flat die-cutting plate. A description of the structural scheme of a flat-cylinder type punching press is presented and the operation of its most loaded unit – the pressure plate drive – is described. It is noted that a feature of the mechanism is the presence of 2 pauses in its operation during the entire press cycle, i.e. the ability to punch 2 sheets per cycle.
The determined mathematical dependencies take into account the influence of many factors of the technological process. To perform kinematic and kinetostatic calculations, the well-known method of dimensionless quantities (invariants) was used, which significantly speeds up the process of designing a typical series of improved presses. The results of kinetostatic calculations show that the short-term peak of the maximum moment from the action of the pressure plate drive mechanism on the main shaft does not exceed 3.4 kN m at a press productivity of up to 6000 cycles per minute. Taking into account the presence of a flywheel in the drive, it is possible to install an engine with less power than in existing similar presses of other types.
The improved pressure plate drive mechanism provides a significant reduction in energy and metal consumption, and simplifies the design of the most loaded part of the die-cutting press.
Keywords: packaging, cardboard, die-cutting press, flat-bed, drive, cylinder, calculation, kinematics, torque.
doi: 10.32403/1998-6912-2024-2-69-140-150
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