Project of instrumentation of cyclic multiple-spindle driller aimed at improving its machining efficiency

Osnovni dio svake viševretene bušilice jest njezina radna jedinica koja se naziva glava za bušenje. Uporaba viševretenih bušilica omogućuje simultano bušenje rupa u redovima, što čini takve bušilice učinkovitijima od jednovretenih bušilica. No njihov je nedostatak nemogućnost bušenja rupa u četvrtastim drvnim elementima. To je osobito velik problem kad je riječ o bušilicama za prolazne provrte, što je razlog da se u području te vrste obrade provode intenzivna istraživanja. Projekt pridonosi proširenju tehnoloških mogućnosti viševretenih bušilica, a u radu se razrađuju neke mogućnosti njihova opremanja.The basic element of each multiple-spindle driller is its working unit also called drilling head. The use of multi-spindle drill heads enables simultaneous drilling of holes arranged in rows, which makes such drillers much more efficient than one-spindle drillers. However their defect is the lack of possibility to make holes in stud elements. Passage drillers are particularly affected by this problem and this is why research on this machine-tooling was undertaken. The project enables widening technological possibilities of multiple-spindle /gang/ drilling machines. This paper deals with the presentation of some types of tooling