Abstract
Quality of the technological part is one of the major problems of modern machine manufacturing. In many cases, components are manufactured from new construction materials with specific properties that are considered difficult to machining applying conventional technologies. Hence, to search for new technologies, including high-pressure abrasive water jet cutting in the context of the S355J2H steel elements manufacture, while maintaining the quality requirements of the machining, is the need. The results of tests on the accuracy of components made of S355J2H steel are presented as dependent on the water jet pressure, cutting feedrate and the amount of abrasive dozed, with constant element thickness. The accuracy of the design measure – regardless of dimensional accuracy – was the magnitude of the lateral sagging of the cut workpiece resulting from the specific mechanism of water jet removal mechanism.
Highlights
The cut gap, the formation of which is a phenomenon of the material removal process at abrasive water-jet, does not find counterparts in known machining practices
Experimental results of the S355J2H steel cutting technology quality indices were performed on a Ridder water-jet cutting machine with a pre-abrasive grinding wheel [4]
The results show that, similar to the water pressure, the cut results are strongly influenced by the circular parts of the workpiece profile, as illustrated in the Table for measured results of circular workpieces of radius 15 mm (R15) and 20 mm (R20), respectively
Summary
Quality of the technological part is one of the major a) problems of modern machine manufacturing. To search for new technologies, including high-pressure abrasive water jet cutting in the context of the S355J2H steel elements manufacture, while maintaining the quality requirements of the machining, is the need. The amount of deviation s determined in a longitudinal section of the slit – with a predetermined thickness of the workpiece and a certain type of material – is dependent on the cutting capacity of abrasive water-jet [4]. Deviations of the shape of the object, determined by the non-perpendicularity of its lateral surface to the base, and in particular, errors of the profile in the circular sections of the profile, will result from the interaction of the high pressure jet with the object in the area of the work gap. Exemplary deviation of the object roundness after cutting with abrasive water-jet
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