Cutting

Holders: Assoc. Prof. Kramar Davorin, Assoc. Prof. Pušavec Franci

Subject description

Prerequisites:

For this lectures, necessary is that students have basic knowledge in materials, kinematics and technical documentation. This would give the possibility to follow the lectures. In order to pass and successfully execute the study, advised is to regularly attend the lectures, study additional theoretical backgrounds to be prepared adequately for laboratory exercises/work and active participation at those exercises.

Content (Syllabus outline):

  • The theory and analyses of chip formation for cutting tools with defined and undefined geometry.
  • The phenomena on the cutting edge and on the machined surface, related to the trends of the cutting forces (static/dynamic), and the influence of vibrations on the machining process.
  • Basic conventional machining processes.
  • Research on tool wear mechanisms, guidelines for tool and cutting material development, machinability of modern materials.
  • Machining processes combined with other processes; fine/precise machining, hybrid cutting processes, etc.
  • Machining process control by tracking the tool wear, modeling the tool life and prediction of catastrophic fractures.
  • Process economics in the sense of machining costs and time optimization, related to the technological databases.

Objectives and competences:

An explanation and demonstration of metal cutting in scope of a mild introduction, introducing the theory of cutting, followed by a focus on the cutting technology. A presentation of classical (turning, milling, drilling, grinding) and state-of-the-art cutting processes (cryogenic machining, machining with high-pressure coolant supply) in a direct relation to modeling and simulating the cutting mechanisms for the individual processes and simultaneous planning of machining technology (prescribing the cutting data, and the tool geometry and quality). The students are presented with the cutting tools and modern machinable materials. The course therefore also incorporates subject matter covering the technology databases, cutting data optimization, machining process control and cutting tool management.

Competences:

  • Mastering the basic machining processes, related to the product specifics, such as: materials and their thermomechanical states, form attributes, required accuracy, surface conditions, etc.
  • The ability to optimize machining processes and select the optimal machining parameters.
  • The ability to evaluate the environmental burdens of selected technologies.
  • Mastering the planning of manufacturing of products, prototypes and tools in relation to size of the production.
  • The ability to model the machining processes and control them using sensors.
  • The ability to assess the principles of sustainable development and the application thereof on modern hybrid machining processes.

Intended learning outcomes:

Knowledge and understanding

The students attain the knowledge on machining theory, including the cutting principles and mechanisms, chip formation, machinability of different materials and machinability criteria. The students will be acquainted with the global trends in the field of machining processes, including the environmental problems and the limitations of the processes. They will learn also about the processes of low-series manufacturing of products, prototypes and tools.

Usage

The students will use the assimilated knowledge to their benefit in all specialized and theoretical courses in the field of manufacturing engineering, as well as in the professional practice, where they will be able to use their knowledge in the field of machining technologies.

Reflection

The theoretical knowledge attained in this course and the experience gathered from practical work in the laboratory will benefit the students in understanding the other specialized courses in the field of material processing, as well as in their work designing parts and structures for different applications.

Transferrable skills – related to more than one course

Good theoretical and practical knowledge of manufacturing technologies, mechanics and similar will help the students follow the lectures well and use the assimilated knowledge in manufacturing engineering.

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