29 research outputs found
Određivanje koeficijenta toplinske vodljivosti kalupnih mješavina
For a thorough understanding of the behaviour of foundry mould mixtures, a good knowledge of thermal properties of mould materials is needed. Laboratory determination of thermal conductivity of mould mixtures enables a better control over scabbing defects which are a major problem in green sand mould mixtures. A special instrument has been designed for that purpose and it is described in this work.Za detaljno razumijevanje ponašanja kalupnih mješavina prilikom lijevanja odljevaka potrebno je dobro poznavati toplinska svojstva kalupnih materijala. Laboratorijsko određivanje toplinske vodljivosti kalupnih mješavina omogućava bolju kontrolu nad pojavom odlupljivanja, koja je kao glavni problem vezana za kalupne mješavine s fizikalno očvrstivim vezivima. Određivanje koeficijenta toplinske vodljivosti provedeno je na posebno konstruiranom uređaju koji je opisan ovim radom
Upravljanje i primjena robota za zavarivanje "REIS ROBOTICS RV6L"
U članku je opisan način upravljanja, glavni sastavni dijelovi i tehničke karakteristike robota za zavarivanje. U uvodnom dijelu je kronološki opisan razvoj zavarivanja te su spomenuti osnovni pojmovi koji se koriste u zavarivanju
Double Tooth
The form of primary and permanent teeth can differ morphologically from that
which is considered normal, completely or in some parts. The changes in tooth form can
be hereditary or caused by some disease or trauma. Fusion is a union of one or more
teeth during development. Gemination means that two separate morphological units
were created by division of the tooth germ. The intention of this study was to state the
prevalence of double teeth (fusion and gemination) among the persons tested, as to gender,
distribution in the maxilla or mandible, and whether the anomaly occurred bilaterally
or unilaterally. The results of this investigation have shown that in a total of examined
3,517 plaster models, a prevalence of double teeth was 0.2%. 57.2% of them were
fusioned and 42.9% geminated