Abstract
The influence of the abrasive grain size on the technological quality of the intersection of non-alloy structural steel S235JR, is presented. The experiment was carried out on a high-pressure water-jet APW 2010BB abrasive cutting machine using the abrasive garnet #80 and #120. Studies included the assessment of intersection surface macrostructure: slit width, shape defects and surface roughness. Experiment has confirmed that the size of abrasive grains significantly influences the macrostructure of the intersection surface. Smoother cuts can be made with finer grains, but finer abrasive particles have less kinetic energy, leading to reduction in the erosion capacity of the water-jet. The study was carried out at variable feedrate, therefore it was possible to determine the influence of the feedrate on the average square surface deviation. Increasing the feedrate resulted in a decrease in the entire width of the cut slit, which was especially noticeable in the lower cut zone of the workpiece.
Highlights
Due to its wide range of machining applications, abrasive water-jet technology is a competitive alternative to commonly used cutting methods [6]
The technological quality [7,8] obtained in the process of cutting is a result of several independent variables, which are parameters of the cutting process [9,10,11]
Understanding the influence of particular parameters of the process on technological quality of the obtained intersection area will allow to develop the model of the cutting process of examined material
Summary
The influence of the abrasive grain size on the technological quality of the intersection of non-alloy structural steel S235JR, is presented. The technological quality [7,8] obtained in the process of cutting is a result of several independent variables, which are parameters of the cutting process [9,10,11]. These parameters can be divided into the following groups: hydraulic (supplying pressure, diameter of the jet, power of the jet), abrasive properties (type of abrasive, grain size, grain shape, abrasive flow rate), technological parameters (feedrate, cutting head distance from the workpiece, geometry of water and molding nozzle).
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