Knowing and understanding the predominant wear mechanisms in machining tools is essential for achieving highly stable and competitive production processes. Over the past few years, the machining tools have used, aiming to improve their tribological characteristics. Temperature is one of the major catalysts for wear mechanisms. The factors leading to the appearance of notch wear are not yet fully known. This paper pre-sents an analysis of the behavior of the main mechanisms that led to the formation of the notch wear in a carbide tool coated with TiN, TiCN and Al2O3 layers, during the turning of the ABNT 1045 steel with hard-ness of 83HRB at 350 m/min cutting speed. Using scanning electron microscopy (SEM) and profilometry, we intend to identify the beginning of the formation of wear and its evolution. The results showed that the friction of the chip on the tool flank side, promotes a local temperature increase, activating some wear mechanisms. Moreover, it can be concluded that notch wear is not unique to high temperature resistant ma-terials, but depends directly on a continuous, high heat flux.

Changes in the form of consumption and major changes in the world automobile market are important incentives for the transition of factories to the fourth industrial revolution. The article presents a different view of the insertion of Industry 4.0 in the auto parts factories, focused on machining lines recently installed in these factories. The transformations brought about by advanced manufacturing and its challenges are exemplified with practical applications that are simple to understand. Some of the new technologies offered by the major manufacturers of CNC machines will also be mentioned, in order to envision possible changes that are to come. All analysis was done using the knowledge of those who participated in at least nine implementations of CNC lines, in order to meet the requirements of the new generation of engines recently implemented in Brazil. The complete adaptation of the factories along the lines of Industry 4.0 is yet to come, however, it is possible to see how the automation of processes, monitoring of stages and status, more complete and cloud traceability and the beginning of the dissemination of controls by vision already bring with them essential concepts of Industry 4.0.

To study the mechanisms of wear in order to improve the performance of conventional machining tools is essential to achieving stable, competitive and high-repeatable productive processes. Currently most cutting tools offered in the market have some type of coating, with the objective of improving the tribological characteristics. The temperature is a catalyst for tool wear. This paper presents an analysis of the behavior of the friction generated in the pin-on-disk, sliding the ABNT 1045 steel pins against uncoated carbide discs and coated whit TiN and (Ti, Al) N by PVD. It is intended to evaluate the behavior of the coating layer on heat transfer to the pin. So far, data on the coefficient of friction, temperatures and images of pins and disks were collected by light microscope. This information showed the temperature behavior of the pin relative to the friction coefficient of the discs and coating. The coating with TiN and (Ti, Al) N increased the heat flux for normalized ABNT 1045 steel pin