Arrangement of devices and a method for empirically determining efficiency index in abrasive waterjet cutting and application thereof in a device for simultaneous control of abrasive waterjet cutting

摘要

An arrangement of devices for determining an efficiency index in abrasive waterjet cutting, i.e. the index unambiguously defining for a certain material the shape of a cut, roughness of surfaces created by cutting, their conical nature depending on the incidence angle of the abrasive waterjet. The arrangement of the invention consists of a known abrasive waterjet cutting machine (1), a thermographic camera (2) and a computer (3), wherein a workpiece (4) is arranged on said machine (1), said workpiece being intended to undergo a cutting procedure; and fixed and variable process parameters (A) of cutting are known: hydraulic, cutting, mixing, abrasive and input parameters of said workpiece. Said thermographic camera (2) is positioned in a way to record in front view the entire front surface (5) of a cut in the workpiece (4) in a known time interval, in that an adequate programme within said computer (3) allocates to each thermographic image (6) cutting parameters (A) that were valid for each point (B) of cutting and finally shows them in the form of a table or chart of a relationship between the efficiency index and one of the parameters (A).