Materials Science Forum Vol. 919

Abstract: The main paper idea was compared three methods (Contact CenterMax and contactless ATOS TripleScan II, Metrotom 1500) for data acquisition to the output characteristics of steel drawing tubes. Outer and internal diameters, eccentricity and ovality were measured. Steel tubes produced by drawing should accomplish shape and dimensional characteristics. These can be measured by various contact and contactless methods. Each of these methods have advantages and disadvantages. The computed tomography advantages are, that we obtain both outer and inner tube shapes. Output is a 3D model from which you can get the elements to evaluate the characteristics. The data acquisition is limited by wall thickness and material density and that is disadvantage. The 3D scanner advantages are, that we obtain outer tube shapes with different diameters and wall thickness regardless of material density. Output is a 3D model. Problem is to obtain data about complex internal shape limited by tube length and diameter and that is the disadvantage. The advantage of acquiring data by contact method is that we obtain both external and internal tube shape, without thickness wall, diameter or material density limitation. The disadvantage is that we don´t obtain a 3D model of tube, but only a spot-scanned elements.

Abstract: Fatigue of materials is the degradation process that results from the cyclical dynamic loading of components in combination with other internal or external factors, e.g. corrosion, defects, etc. This paper mainly focuses on the analysis of the causes leading to the damage of a pin in a car trailer´s braking system. The damage of the pin was caused by a few, mutually independent, parameters. Several techniques such as macroscopy, microscopy (light, SEM) and dimension measurement were used for the damage analysis. The material and geometry of the pin were the main issues identified leading to the failure of the part in question.

Abstract: The article focuses on the design, construction and manufacture of an inspection vehicle intended to access difficult-to-reach places. The vehicle is able to monitor piping system failures at the view angle of 180° in deep depths and adverse environments. The individual components of the inspection vehicle, more detailed their programming and production on CNC machines are discussed. The vehicle is supposed to easily run into the piping systems and can be safely pulled out. A control system was created for motion and video signal transmission to the operator from above the ground. Aluminum alloy (EN AW 2024) is the predominant material of the manufactured components and at the same time has ideal processing and operating properties. Proposed inspection vehicle is a robust and functional solution with minimal maintenance.