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Prototypowe stanowisko do plazmowego topienia metali

100%

Modrzyński A. , Grześkowiak K. , Namyślak R. , Niewiedział R.

tom R. 2, nr 44

489--495

W artykule przedstawiono budowę i dokonano charakterystyki elementów składowych prototypowego stanowiska do topienia metali przy wykorzystaniu jako źródła ciepła plazmy niskotemperaturowej generowanej w warunkach obniżonego ciśnienia. Podano wyniki wstępnych badań parametrów pracy stanowiska uzyskane podczas topienia czystej miedzi i niklu. Prezentowane stanowisko docelowo przeznaczone jest do topienia tytanu i jego stopów w tyglu „garnisażowym”.

The characteristic elements of structure and the construction of prototype stand for vacuum melting of metals with application of low temperature plasma have been described in this paper. Parameters of testing melts of pure cooper and nickel have been presented as well. This stand will be using by authors for skull melting titanium and titanium alloys in a next stage.

Testing of beveled crimp connections made on a prototype stand

84%

Wróbel N. , Rejek M. , Królczyk B.

tom Vol. 38

15--22

The purpose of this study is to form and test inseparable tight joints, commonly used in the construction of heat exchangers, by crimping operation on designed prototype stand. Crimped joints are made by tools in form of cones with two types of shapes, each of the designed tools have got identical forming angle. This study uses two types of connecting blocks and plates, differing in diameters of hole and flange. Elaboration contains a case study of joints being made by the stand, which in addition to the crimping operations for some cases were glued or brazed. The article presents the features of the formed joints, by examining them by destructive testing: Micrography, tensile strength test, and non-destructive testing: Leakage test. The examined elements have been made of aluminum 6060, which is well suited to indirect or direct operations of forming joints for all kinds of coolers or condensers. Elaborated tests and studies in this study allowed to state, that joining the connection block to plate with the small diameter, was more energy-consuming than in sample sets with bigger diameter, use of glue increasing the strength of the joints by 20%, significant strength increase can be obtained after mechanical clinching with brazing operation or modification of geometrical shape of the jaws.