Diagnosis of machine tool with using Renishaw ball-bar system

Abstract

The article deals with accuracy of machine tools. The aim was to determine the accuracy with which already operates used machine – HAAS CNC Milling machine MiniMill. For evaluation of accuracy of the machine tool was used Renishaw QC20-W Ballbar system, which has the Department of Machining, Assembly and Engineering Metrology of VŠB – TUO. The theoretical part describes the measurement principle using a telescopic Ballbar system. The principle of measurement is the comparison of the actual deviation from the ideal circle which is programmed. Experimental part is focused on the diagnosis of the whole process by the direct method of measurement during changing feed rate. Specifically, the determination of circularity deviation at machine tool was in accordance with international standards, e.g. ISO 230-4.

Behaviours Indicators of Machine Tools

“…The proposed sequence of movements is: Each movement is a simplification of a more complicated test. For example, circular interpolation and the monitoring of internal position sensors is a simplification of the ball-bar test [6], which is commonly applied for machine tool geometric evaluation. Ball-bar test requires a specific hardware to track the position of the spindle during a circular interpolation.…”

Design of the Automated Calibration Process for an Experimental Laser Inspection Stand

“…From a wide range of applications, only specific applications are for one-axis measurement (Laser interferometry) or measurement in 2 axes (Ballbar), which is not suitable for more general measurement purposes such as area scanning, 3D scanning, etc. [ 17 , 18 , 19 ]. In the market and industry, is it possible to meet more commercial devices which are, in principle, very similar to the products from the Renishaw company.…”

Fingerprint: Machine Tool Condition Monitoring Approach for Zero Defect Manufacturing

“…Few applications use the collected information to determine more elaborated, and useful, data and apply it to optimize the manufacturing performance. Furthermore, the application of this type of technology in small and medium-sized companies is still an utopia, since they do not have the economic possibilities to renew their machinery [Frank 2019]. In this way, the need to apply the Industry 4.0 concept in manufacturing processes still arises, adapting it to the possibilities of the multiple machining companies in the sector.…”