Developing a drill boom attachment to extract iron ore in a new mining system

Sammanfattning: The modern product development technique led this bachelor thesis forward with structure and finesse by using the Double Diamond theory. The bachelor thesis was carried out in collaboration with LKAB and NECAB with the aim of develop and design a two-parted mechanical attachment for their new mining system. The attachment should support a drill rig and enable the drill to tilt and also transfer the drill rig along its drilling direction. The attachment will be implemented into their new mining method with purpose to increase the safety and reduce the cost to extract iron ore. A prestudy was done to reduce time designing and dimensioning the final product by analyzing the mechanics of the attachment. Compendiums that analyze the mechanical design of the product has also been used in the prestudy. The prestudy addressed the safety aspect by following the European Parliaments directive 2006/42/EC. The final design was a concept that involved a hydraulic cylinder to tilt the drill and a set of rack and pinion to achieve the linear movement of the drill. The rack and pinion are powered by a hydraulic motor with a planetary gearbox. To generate enough torque to overcome the torque needed, two sets of planetary gearboxes with belonging rack and pinion are used on each side of the drill boom. A sledge is used to support the drill boom that is sliding on the sledge. To reduce the friction between the two, slide bushings are mounted to the sledge.