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Advanced methods of surface topography evaluation
Metelková, Jitka ; Prokop, Jaroslav (referee) ; Píška, Miroslav (advisor)
This paper provides an overview of contemporary methods for evaluation of the part surface, nowadays measurement devices and evaluated parameters. The main part of the paper is devoted to advanced methods of surface topography evaluations including the application of the new non-contact measurement technique Alicona G4. The experimental part deals mainly with a study of surface texture parameters of the machined aluminium alloy AlCu4MgSi when face turning. It concerns mostly a study of the tool feed rate influence (the uncoated insert GIPA-6.00-3.00, ISO 513 N05-N25, Iscar) on selected profile and surface parameters, including comparison of measurement results achieved by the contact (Form Talysurf Intra 50, Taylor Hobson) and non-contact method (IFM G4, Alicona).
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On the cutting of cast superalloys
Metelková, Jitka ; Sliwková, Petra (referee) ; Píška, Miroslav (advisor)
This work deals with the issue of defects generation during the separation of the castings from a nickel-based superalloy, Inconel 738LC. The technology of investment casting is presented, followed by a description of metallurgy of superalloys, their physical and mechanical properties, as well as their technical applications. The machinability of superalloys and method of castings separation were also described as well as some of the casting defects that were reported to have impact on the generation of the defects after cutting. In the experimental part, the material microstructure and casting defects were analyzed. The experimental machining part consisted first of a comparative study of the friction sawing and plasma arc cutting technology at the standard operating conditions actually used in production. Second, an optimization study for the friction sawing was carried out, with a special focus on the suitability of an alternative cutoff wheel for the chosen application. Application of this wheel allows reducing the security distance between the cut and the part, thus reducing the production cost of the part.
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Advanced methods of surface topography evaluation
Metelková, Jitka ; Prokop, Jaroslav (referee) ; Píška, Miroslav (advisor)
This paper provides an overview of contemporary methods for evaluation of the part surface, nowadays measurement devices and evaluated parameters. The main part of the paper is devoted to advanced methods of surface topography evaluations including the application of the new non-contact measurement technique Alicona G4. The experimental part deals mainly with a study of surface texture parameters of the machined aluminium alloy AlCu4MgSi when face turning. It concerns mostly a study of the tool feed rate influence (the uncoated insert GIPA-6.00-3.00, ISO 513 N05-N25, Iscar) on selected profile and surface parameters, including comparison of measurement results achieved by the contact (Form Talysurf Intra 50, Taylor Hobson) and non-contact method (IFM G4, Alicona).
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