Author
Peter Krajnik
Other affiliations: Scania AB, University of Ljubljana, Royal Institute of Technology
Bio: Peter Krajnik is an academic researcher from Chalmers University of Technology. The author has contributed to research in topics: Grinding & Machining. The author has an hindex of 20, co-authored 80 publications receiving 2186 citations. Previous affiliations of Peter Krajnik include Scania AB & University of Ljubljana.
Topics: Grinding, Machining, Tool wear, Lubrication, Surface integrity
Papers published on a yearly basis
Papers
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TL;DR: In this article, the authors present general issues, methods and a case study for achieving production sustainability on a machining technology level, and conclude that the future of sustainable production is going to entail the use of alternative machining technologies to reduce consumption rates, environmental burdens, and health risks simultaneously, while increasing performances and profitability.
461 citations
TL;DR: In this paper, the authors present a case-study that highlights the importance of sustainable machining technologies in achieving sustainable development objectives, and a technology evaluation was undertaken to understand the likely impacts of the use of technology on sustainability performance measures.
314 citations
TL;DR: In this article, the concept of Resource Conservative Manufacturing (ResCoM) is proposed for sustainable manufacturing strategies with resource and environment conservation as their integral part, where the conservation of energy, material and value added with waste prevention and environment protection are integrated components of the product design and development strategy.
251 citations
TL;DR: A review of state of the art technology of high-performance grinding at increased wheel speeds with highly efficient abrasives for enhanced productivity and precision demands is referred to.
224 citations
TL;DR: Abrasive fine-finishing technology is often applied as a final finishing process, and the selection of the right technology is crucial to obtaining the desired performance of functions such as fatigue life.
Abstract: Abrasive fine-finishing technology is often applied as a final finishing process, and the selection of the right technology is crucial to obtaining the desired performance of functions such as fatigue life. This paper begins with classifications of the technology along with fundamentals and brief histories of the individual methods. The material removal mechanisms, specific energies, and finishing characteristics of the various technologies are summarized giving assessments of the surfaces created by them. Guidelines developed for selecting the appropriate methods, and case studies illustrate the effectiveness of various methods. This paper ends with a discussion of the future prospects of the technology. (C) 2016
163 citations
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TL;DR: This article conducted an extensive literature review, employing bibliometric analysis and snowballing techniques to investigate the state of the art in the field and synthesise the similarities, differences and relationships between both terms.
3,508 citations
TL;DR: In this paper, the authors define the concept of circular economy from the perspective of WCED sustainable development and sustainability science, and conduct a critical analysis of the concept from a perspective of environmental sustainability, identifying six challenges, for example those of thermodynamics and system boundaries, that need to be resolved for CE to contribute to global net sustainability.
1,841 citations
TL;DR: In this article, the authors provide a comprehensive review of research efforts encompassing aspects of resources scarcity, waste generation and economic advantages; explore the CE landscape in the context of these three aspects especially when they are considered simultaneously; based on an idea of a comprehensive CE framework, propose an implementation strategy using top-down and bottom-up approach in a concurrent manner.
1,562 citations
TL;DR: In this paper, the authors provide an overview of machining induced surface integrity in titanium and nickel alloys and conclude that further modeling studies are needed to create predictive physics-based models that is in good agreement with reliable experiments.
Abstract: Titanium and nickel alloys represent a significant metal portion of the aircraft structural and engine components. When these critical structural components in aerospace industry are manufactured with the objective to reach high reliability levels, surface integrity is one of the most relevant parameters used for evaluating the quality of finish machined surfaces. The residual stresses and surface alteration (white etch layer and depth of work hardening) induced by machining of titanium alloys and nickel-based alloys are very critical due to safety and sustainability concerns. This review paper provides an overview of machining induced surface integrity in titanium and nickel alloys. There are many different types of surface integrity problems reported in literature, and among these, residual stresses, white layer and work hardening layers, as well as microstructural alterations can be studied in order to improve surface qualities of end products. Many parameters affect the surface quality of workpieces, and cutting speed, feed rate, depth of cut, tool geometry and preparation, tool wear, and workpiece properties are among the most important ones worth to investigate. Experimental and empirical studies as well as analytical and Finite Element modeling based approaches are offered in order to better understand machining induced surface integrity. In the current state-of-the-art however, a comprehensive and systematic modeling approach based on the process physics and applicable to the industrial processes is still missing. It is concluded that further modeling studies are needed to create predictive physics-based models that is in good agreement with reliable experiments, while explaining the effects of many parameters, for machining of titanium alloys and nickel-based alloys.
986 citations
TL;DR: A systematic overview of the state of the art in energy and resource efficiency increasing methods and techniques in the domain of discrete part manufacturing, with attention for the effectiveness of the available options is provided in this paper.
Abstract: A B S T R A C T This paper aims to provide a systematic overview of the state of the art in energy and resource efficiency increasing methods and techniques in the domain of discrete part manufacturing, with attention for the effectiveness of the available options. For this purpose a structured approach, distinguishing different system scale levels, is applied: starting from a unit process focus, respectively the multi-machine, factory, multi-facility and supply chain levels are covered. Determined by the research contributions reported in literature, the de facto focus of the paper is mainly on energy related aspects of manufacturing. Significant opportunities for systematic efficiency improving measures are identified and summarized in this area. 2012 CIRP.
936 citations