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Primerjava naprav za doziranje abraziva pri rezanju z vodnim curkom
Juričič, Marko (Author), Lebar, Andrej (Mentor) More about this mentor... This link opens in a new window, Valentinčič, Joško (Co-mentor)

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Abstract
Rezanje z abrazivnim vodnim curkom (AVC) uporablja visokohitrostni vodni curek, kateremu dodajamo mineralni abraziv. Abrazivna zrna se v šobi močno pospešijo, zaradi svoje velike hitrosti in trdote skupaj z vodo ob stiku z obdelovancem odnašajo material. S tem postopkom lahko obdelujemo skoraj vse vrste materialov, ne glede na njihovo sestavo, strukturo in trdoto. Velika prednost tega postopka je ta, da ni toplotno vplivanega področja. Poznamo različne načine doziranja abraziva, najbolj pogosta sta dva načina: prvi je gravitacijski, kjer je masni pretok določen s premerom zaslonke, pri drugem masni pretok določamo tako, da spreminjamo hitrost vrtenja elektro motorja, ki poganja transportni trak ali kolo. V delu smo predstavili proces rezanja z AVC in pregledali literaturo o merjenju masnega pretoka zrnatih materialov. V eksperimentalnem delu smo izdelali dozirni sistem z vrtečim se kolesom, izmerili masne pretoke na treh različnih dozirnih sistemih in ovrednotili enakomernost masnega pretoka.

Language:Slovenian
Keywords:abrazivni vodni curek, abrazivi, dozirni sistemi, masni pretoki
Work type:Master's thesis/paper (mb22)
Tipology:2.09 - Master's Thesis
Organization:FS - Faculty of Mechanical Engineering
Year:2019
Views:58
Downloads:40
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Secondary language

Language:English
Title:Comparison of abrasive dosage systems for water jet cutting
Abstract:
Abrasive water jet cutting (AWJ) uses a high speed water jet to which a mineral abrasive is added. Abrasive grains are greatly accelerated in the nozzle, due to their high speed and hardness they remove material along with the water in contact with the workpiece. With this process, almost all types of materials can be machined, regardless of their composition, structure and hardness. The great advantage of this process is that there is no heat affected zone. There are different ways of dosing the abrasive, the most common are two methods: the first is gravity method, where the mass flow is determined by the diameter of the orifice, for the second, the mass flow is determined by varying the speed of electric motor that drives the conveyor belt or wheel. In this paper we presented the process of AWJ cutting and reviewed the literature on measuring mass flow of granular materials. In the experimental part we designed a dosage system with a rotating wheel, measured mass flow rates on three different dosing systems and evaluated the steadiness of mass flow rate.

Keywords:abrasive water jet, abrasives, dosage systems, mass flow

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