Page 222 - Demo

220 ISCAR DEEP HOLE DRILLINGThe gundrill is directed into the workpiece during penetration by guide bushing (Figure 6.5.1.2). An alternative to using guide bushing can be pre hole operation. During drilling, the movement can be done by the drill or by the workpiece. To minimize runout, the drill is supported by support bushing along the drill length. The hole in support bushing on which the drill is located can have two shapes, a round hole or a hole with a %u201cV%u201d shape that matches the cross section of the drill (Figure 6.5.1.2). The sealed housing contains a sealing disk that deflects the swarf and directs it into the chip receiver of the machine (Figure 6.5.1.2). The swarf in the chip receiver filtered and separates the chips from the coolant.Gundrilling machines are available in many variations, from single-spindle manual models to CNC units with multiple spindles of different designs. They can be integrated into transfer lines or be part of a machining or turning center. Gundrilling is also becoming popular as a retrofit package for both conventional and CNC machines.Figure 6.5.1.2driverGuide Bushing Sealing Disk Support BushingRound Hole V Shape