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The properties of regenerative polymer mass

Rudawska A., Wierzchowski A., Müller M., Petrů J., Náprstková N.

Advances in Science and Technology. Research Journal

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2017

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Vol. 11, no 3

130--138

EN

The paper investigates the compression strength of samples of regenerative polymer mass RM 101 Resimetal Metal Repair Pasta manufactured by Rendor. The effect of weather conditions on selected mechanical properties of the tested mass is examined. The samples are subjected to seasoning at room temperature, in an environmental chamber, and in a thermal shock chamber. The samples for strength testing are made according to the adopted method. It has been observed that the samples seasoned at room temperature have the lowest strength, while the highest strength is exhibited by the samples subjected to seasoning in an environmental chamber at a temperature of 70°C and humidity of 95%. In addition, the paper compares the strength properties of regenerative polymer masses manufactured by Chester Molecular, Belzona, and Unirep, as well as of the widely used epoxy compound Epidian 57 mixed with the Z-1 curing agent with those of the Rendor mass. The properties of the above masses are obtained from the available literature.

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Effect of the cutting tool geometry on the tool wear resistance when machining Inconel 625

Zlámal T., Hajnyš J., Petrů J., Mrkvica I.

Advances in Science and Technology. Research Journal

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2017

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Vol. 11, no 4

286--293

EN

The paper deals with the design of a suitable cutting geometry of a tool for the machining of the Inconel 625 nickel alloy. This alloy is among the hard-to-machine refractory alloys that cause very rapid wear on cutting tools. Therefore, SNMG and RCMT indexable cutting insert were used to machine the alloy. The selected insert geometry should prevent notch wear and extend tool life. The alloy was machined under predetermined cutting conditions. The angle of the main edge and thus the size and nature of the wear changed with the depth of the material layer being cut. The criterion for determining a more suitable cutting geometry was the tool’s durability and the roughness of the machined surface.

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Effect of chip breakers on the cutting force during the machining of steel C45

Kratochvíl J., Petrů J., Pagáč M., Holubják J., Mrazik J.

Advances in Science and Technology. Research Journal

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2017

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Vol. 11, no 1

173--178

EN

The paper deals with the dependence of cutting force on the breaker of an indexable cutting insert (ICI). The experiment monitored individual cutting force components for different insert breakers, cutting speeds and feed rates during machining. The cutting depth remained constant. The tool holder, material and coating of the indexable cutting insert was also identical.

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Impact of cutting tool geometry on the dynamic load of system in the machining process of nickel Alloy 625

Hajnyš J., Zlámal T., Petrů J., Pagáč M., Rudawska A.

Advances in Science and Technology. Research Journal

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2016

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Vol. 10, nr 32

24--31

EN

The article is focussed on comparing and determining the impact of the cutting geometry of the cutting tool due to dynamic load on system and microgeometry machined surface. For longitudinal turning nickel alloy Alloy 625 (W. Nr. 2.4856) rounded indexable cutting insert was used (RCMT 10T3M0 – F2) and its equivalent squared indexable cutting insert (SNMG 120412 – MR3) coated with fine-grained PVD (Ti, Al) N + TiN. Experimental testing of nickel Alloy 625 was under predetermined cutting conditions. In the selected depth of the removed material of 0.5 mm and 1.5 mm was measured in the course of machining the size of the individual components of cutting forces.