Unconventional machining methods, or also progressive machining methods, such as laser cutting, waterjet cutting, ultrasound machining, etc. are undergoing a very rapid development. Laser cutting machines often evaluate even 80 parameters in real time. Their advantage is the significantly higher productivity. Many values are defined by the machine manufacturer and can not be changed for a given laser. For custom laser cutting there are 2 essential parameters, adjustable depending on the process gas employed. The aim of this article is to find the setting that will reduce the consumption of process media while maintaining or improving the quality of the machined surface.
Paper deals with the evaluation of protective coating surface layer Al-Si at boron steel 22MnB5. Parts from these steels are used at the car-body design. Such parts are produced by hot forming technology that means not only higher requirements on material but also on the surface layer. Coatings are used to protect surface against oxidation during heating and also support the own forming process inside the tools. In this paper is evaluated the protective layer change during heat treatment-heating in furnace (8, 12 and 16 min). Performed microscopic analysis of Al-Si surface layer proves the thermal regime influence on the change of coating properties.
The paper deals with the monitoring of utility properties of new coating type on the basis of Zn/Mg (ZM). For the comparison there was used commonly used coating in the series production of car-body panels on the basis of zinc (Z100). Measured results markedly contribute to improve production systems of car-body adhesion bonding on the basic of performed evaluation of applied coatings types utility properties quality with regard to influence of temperature and corrosion environment. Testing was carry out by T-peel test acc. to ISO 11339 when such type of loading represents crucial bonding fracture type. Thus results reveal information about behavior of adhesive joints strength properties together with the type of fracture as a criterion for suitable application of new coatings types on the basis of Zn/Mg and their implementation into series production of automobiles.
The theory and practice in engineering industry is not the same. Durability of cutting tools is defined in standard ISO 3685. In standard ISO 3685 is defined T-vc dependence for different cutting materials and standard included process evaluation of tool durability for cutting materials made of high speed steel, sintered carbide and cutting ceramic. Standard ISO 3685 contains instructions how to create T-vc dependence for cutting tools made of cutting ceramic. In this standard are only instructions how to create T-vc dependence according to Taylor. The article compares T-vc dependencies for various cutting ceramics (Al2O3, Al2O3+ZrO2, Al2O3+TiCN) with T-vc dependence defined in standard ISO 3685, because this standard describes T-vc dependence for all entered cutting materials together.
These days are in the automotive industry going to be still more and more used new types of protective coatings on the Zn-Mg basis. The advantage of these coatings is their excellent protection against corrosion of basic material. On the other hand disadvantage is mainly their low formability which takes effect at own stamping process. Such paper deals with the research influence of the deformation on the damage process of this coating. Size of deformation at different stress states was measured with the help of photogrammetry (system ARAMIS). Coating damage process at these stress states was monitored by means of optical and electron microscopy. Results of protective coating Zn-Mg damage process are presented in the form of strain distribution maps and images from optical and electron microscope.
The article builds on the Euro-CASE Policy Paper published in 2013 on "Transforming Manufacturing' A path to a Smart, Sustainable and Inclusive growth in Europe" [Euro-CASE 2013]. The industry is a very significant sector of the economy in the Czech Republic, it is crucial to follow new industry challenges as the upcoming digital revolution enables connectivity, automation, robotization etc. with the potential to change the productive structure and reorganise the value creation increasingly around digital platform ecosystems. Digital platforms refer to a technology-enabled business model that facilitates exchanges between multiple agents and offers a value that is proportional to the size and the quality of the engaged community. The exponential change of technology development and the globalization challenge the structure of production and manufacturing not only in the Czech Republic, but also on the European level. The paper raises discussion points on the above mentioned future challenges.
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