Welding Metallurgy of

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Metal Cutting Principles

Predicting tool life in turning operations using neural networks and image processing

Purpose




This paper aims to examine the views of the global knowledge management (KM) community on the research area of KM and business performance and identify key future research themes.




Design/methodology/approach




An interview study spanning 222 informants in 38 countries was launched to collect data on KM expert views concerning the future research needs of the KM field.




Findings




The value contribution of KM requires more research despite experts agreeing on the complexities involved in solving this challenge. Further research areas identified were related to the influence of KM to support business strategy, intellectual capital, decision-making, knowledge sharing, organizational learning, innovation performance, productivity and competitive advantage.




Research limitations/implications




The sample is dominated by European-based KM experts and the self-selecting sampling approach that was used by relying on the networks of each partner could have biased the structure of this sample.




Practical implications




The recognition of the complexity to demonstrate the value contribution of KM could prevent practitioners from using over-simplified approaches and encourage them to use more advanced measurement approaches.




Originality/value




The paper is unique, in that it reports on the views of 222 KM experts from 38 countries representing both academia and practice, on the issue of future research needs in terms of KM and business outcomes. As such it provides valuable guidance for future studies in the KM field and related subjects.

/pdf/knowledge-management-and-business-performance-global-experts-5d3scoobik.pdf

Knowledge management and business performance: global experts’ views on future research needs

This study deals with the analysis and usefulness of the material ratio curve The parameters obtained from this curve are presented The most popular of these parameters include two groups that are derived from this curve and provided in the ISO 13565–2 (Rk) and ISO 13565–3 (Rq) standards They are compared by considering their practical significance and sensitivity to measurement errors The parameters in the Rk family can easily be calculated but are ambiguous, which leads to errors in their calculation The Rq group, which is based more on theoretical logic, must be applied with great care because of the problems with the Rpq parameter calculation and approximation of the material ratio probability plot The methods of obtaining the correct oil capacity and its relation with the transition point between the central and valley surface parts are presented The application of the material ratio curve in low-wear assessment is discussed

Material ratio curve as information on the state of surface topography—A review

Nadzor trosenja reznog alata upotrebom otpornih slojeva Prethodno priopcenje Clanak se bavi problemima nadzora procesa rezanja u stvarnom vremenu. Usmjeren je na trosenje alata pomocu otpornih slojeva primjenjenih na keramickim plocicama. U eksperimentalnom dijelu postupak rezanja se prati pomocu mjerenja elektricnog otpora. Rezultati su uspoređeni i verificirani pomocu mjerenja temperature rezanja i trosenja alata. Ispitivanje impedancijskih slojeva je prihvatljivo uglavnom za dijagnostiku rezne ostrice. Sirina tog sloja određuje dodatak zbog trosenja (trosenje stražnje povrsine). Pretjerano trosenje uzrokuje znacajno smanjenje tog sloja, a time i znacajan porast elektricnog otpora, sto je znak upozorenja na kraj trajnosti rezne ostrice. Kljucne rijeci: keramicka plocica, otporni sloj, trosenje alata, tokarenje

/pdf/cutting-tool-wear-monitoring-with-the-use-of-impedance-2y83a6xfpj.pdf

Cutting tool wear monitoring with the use of impedance layers

The paper analyses the impact of mechanical milling pre-treatment parameters on adhesive joint strength. Comparison of surface roughness of adherends after milling and its effect on adhesive joint strength is analysed in strength tests. The tests were performed on C45 structural steel specimens, which were subjected to machining at different parameters, with two types of milling cutters. Adherends were degreased prior to adhesive joining. Two types of end mills used in tests were NFPaφ20 high-speed steel cutter and R390-020B20-11L indexable milling cutter. The machining was carried out at three cutting speeds: 0.05, 0.15 and 0.30 mm/tooth. Adherends were joined with an adhesive composition of Epidian 57 epoxy resin and Z-1 curing agent.

Milling as a method of surface pre-treatment of steel for adhesive bonding

Due to customer driven economies, today’s world markets are characterized by high fluctuations in market demand and frequent arrival of new technologies and new products. To stay competitive in such markets manufacturing companies require continuous improvements both in technical and organizational areas of their activity. The paper presents results of the diagnosis provided in the manufacturing area of the company producing cardboard packages and recommendations to make the production process more efficient. Especially, among the proposed technical and organizational recommendations the most important ones are: automation of certain elements of the production process and changes in production plant layout.

/pdf/technical-and-organizational-improvements-of-packaging-5amr1dukfr.pdf

Technical and organizational improvements of packaging production process

Our study focuses on two basic areas, firstly on knowledge management, describing its significance and benefits to enterprises, but our main focus is the decision-making, decision making procedures and their relation to the knowledge management. In our study we deal with use of knowledge managment in decision-making.As far as the products are changing, so do the technologies, markets and business conditions as well – same stands for enterprises in global market economy. Consequently, there is the need to change business strategies and management systems used by enterprises, because they are subject to changes as well. These changes have to help enterprises to adpat to global economy changes, so the frequency of these changes is growing. But what does it mean to succesfully adapt? Answer lies in responding to and satisfying customer needs, effectively answer to their requirements and innovate, change the business and its management systems as well. The knowledge management belongs to up-to-date management systems and more and more enterprises implement it. This is the reason why we focus our study to its use in decision making procedure as one of the key managerial process.

Decision - Making, and Their Relation to The Knowledge Management, Use of Knowledge Management in Decision - Making

The article deals with the evaluation of the roughness of the machined surface, steel ISO C45 and ISO 11CrMo9-10 after machining at interrupted cutting conditions. A regular interrupted cut and irregular interrupted cut can have significant effect on the resulting surface of components. Parameters of roughness were measured on the slats, which was machined with using the interrupted cutting simulator. The slats were gradually machined - 4, 3, 2 and 1 slat for getting irregular interrupted cut. Selected parameters of roughness which were tested; Ra - an average arithmetic deviation, Rq - an average quadratic deviation and Rz - the maximum height of the roughness profile. Experiment took place in cooperation with Faculty of Mechanical Engineering of VSB - TU Ostrava and Faculty of Mechanical Engineering of ZU Zilina - machining in the laboratories of ZU Zilina, Slovak Republic.

/pdf/roughness-evaluation-of-the-machined-surface-at-interrupted-amfrd4hh1x.pdf

Dana Stančeková

Papers

Cutting tool wear monitoring with the use of impedance layers

Milling as a method of surface pre-treatment of steel for adhesive bonding

Technical and organizational improvements of packaging production process

Decision - Making, and Their Relation to The Knowledge Management, Use of Knowledge Management in Decision - Making

Roughness Evaluation of the Machined Surface at Interrupted Cutting Process