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Experimental research of paperboard cutting in die cutting press with the screw–nut transmission of drive mechanism of a movable pressure plate

Ternytskyi Serhij, Rehei Ivan, Kandiak Nazar, Radikhovskyi Ihor, Mlynko Oksana

Acta Mechanica et Automatica

2021

Vol. 15, no. 3

122--131

This paper reports experimental research of torques during paperboard cutting in the die cutting press with the screw–nut transmission in the drive mechanism of the movable pressure plate. The purpose of the study is to substantiate the practical implementa-tion of the pressure plate drive mechanism with the use of screw–nut transmission for the production of cartons of paperboard blanks. The manufactured experimental bench for the research of paperboard blanks provides the possibility of getting dependencies of loads on different parameters of the die cutting process. The developed method of the experimental research envisages the use of the strain gauge method and the wireless module for data measurement and software for its processing that allow getting trustworthy results with minimum faults. As a result of experimental research studies, the impact of paperboard thickness and cutting velocity on torque values has been established. Results of experimental research allow getting trustworthy and systematised information about torque values depending on the thickness of the paperboard, the paperboard fibre direction and pressure plate displacement velocity. It is established that torque values on drive shaft during die cutting of paperboard blanks made of folding boxboard with thickness that lay in range of 0.3–0.7 mm. Experimental research studies show the impact of rotation speed of a drive shaft of the pressure plate drive mechanism on the torque value. The article shows the workability of the designed device with screw–nut transmission in the drive mechanism of a movable pressure plate.

Modelowanie uszkodzeń pojawiających się na nożu podczas cięcia na gilotynie

Kaczmarczyk J.

Modelowanie Inżynierskie

2010

T. 9, nr 40

117-124

W pracy przedstawiono stan naprężenia i odkształcenia w pakietach blach stalowych wywołany losowo pojawiającymi się uszkodzeniami na ostrzu noża podczas ich przecinania na gilotynie. Obliczenia numeryczne prowadzono za pomocą metody elementów skończonych. Uszkodzenia na nożu zamodelowano w kształcie półkoli o różnych dyskretnych wartościach promieni. Analizowano ruch główny noża pod pewnym kątem, który zmieniał się w pewnym ustalonym zakresie w odniesieniu do poziomego stołu. Zakres ten podzielono na kilka dyskretnych wartości i dokonano analizy jego wpływu na pojawiające się obszary koncentracji naprężeń i energii w przecinanych pakietach.

In the paper the state of stress and strain in bundles of steel sheets induced by randomly occurring defects on the blade of the cutting tool during cutting process on a guillotine using the finite element method has been introduced. The defects on the cutting tool have been modelled in the shape of semicircles with different discrete values of the radii. The main movement of the cutting tool at a certain angle which varies in an established range related to the horizontal table was analysed. That range was divided into several discrete values and the analysis of its influence on the occurring zones of stress and energy concentration in the bundles being cut was performed.