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The advantage of using the microcontroller PIC18F4455 as a control tool for a band saw

Wojnarowski J., Borowik B.

Archive of Mechanical Engineering

2008

Vol. LV, nr 3

237-245

The paper describes a system that utilizes a microprocessor in controlling the clamping force of the band saw teeth against the cutting metals. This control system allows the blades to operate more efficiently, and prolongs the blade life. It also has an influence on the removal of chips from the blade and maintains a constant strength over the blade. The system can operate in the vertical and horizontal position. A highly advanced and powerful microcontroller PIC18F4455 is programmed to operate with feedback from 4 sensors. Additionally system requires the parametrical data on the shape, the profile and the kind of material to be cut, for adjustment the process of cutting. Feedback control is implemented via a collocated force actuator/rate sensors. The control theory is used to develop controllers, which achieve robust stability.

Celem przeprowadzonych badań było zastosowanie układu sterowania naciskiem piły na przecinany materiał. W układzie sterowania wykorzystano programowalny mikrokontroler serii PIC. Program wypalony na pamięci flash umożliwia regulację ciśnienia w układzie hydraulicznym przez co możliwe staje się odpowiednie sterowanie naciskiem piły. Dla sterowania silnikiem pompy wykorzystano moduł PWM. Poprzez sterowanie programowalnym procesorem uzyskano powtarzalność nacisków dla ciętych w procesie seryjnym elementów.

Influence of the machine cutting depth on the state of stresses of an endless band saw

Wojnarowski J., Kaczmarczyk J.

Zeszyty Naukowe Katedry Mechaniki Stosowanej / Politechnika Śląska

2005

z. 28

137-142

In the paper, a stereomechanic analysis of the cutting edges of a band saw in an established cutting process with a variable depth of machining has been presented. The numerical calculations were carried out according to the finite element method using the computer system MSC/Patran with the computational module MSC/Nastran. In the modelling process, the geometrical nonlinearities resulting from the contact of the cutting surface of the band saw sector model with the machined material were taken into consideration. The selected results of numerical calculations have been gathered: in figures, graphically in a diagram and in the form of a colourful map of Hertz's stresses.