The classification of core drill bits

Rotary core drill biting rig construction of the strata vary, technical requirements and different, just by selecting different core drill bits to meet various construction requirements, so do the matching rotary core drill biting rig core drill bit work is very important. Impact rotary core drill biting rig core drill bit matching many factors, summed up in three aspects: stratigraphy; rig functions; hole depth, the specific requirements of the aperture, Shen ballast thickness Wall measures. First, the current classification of common auger core drill bit bit common spiral auger core drill bit, rotary bucket, drum core core drill bit, core drill bit belled, GRABBING cone core drill bit and hydraulic grabs, following a brief introduction by the class. 1, the auger (1) cone: Double double spiral for hard rock. Double single screw for weathered bedrock, gravel, soil, etc. containing ice. Equipped with a variety of the above core drill bit cutter through tooth pitch, helix angle of the change can be derived from the many types of core drill bits. (2) straight auger: bucket teeth straight Lo: Double double spiral, suitable for sand, cement poor small-diameter gravel; single-headed screw, suitable for sand, soil; single head single screw for poor cementation large diameter gravel, clay soil and hard clay. Straight screw cutter: a double spiral, three and four-Lo Lo, then apply hard rock or gravel. 2, auger core drilling bit bucket teeth can be divided by the installed cutter core drill bit bucket and bucket teeth core drill bit bucket; the floor can be divided according to the number of double bottom bucket and single bottom bucket; can be divided according to the number of open double doors and single bucket open bucket; can be divided according to taper cone barrels barrels barrels of core drill biting straight core drill bit bucket and bucket; can be divided according to the lower plate shaped pot bottom of the core drill bit core drill bit bucket peaceful struggle. Above structure combined with each other, plus whether vented, change door mechanism can be combined dozens of auger core drill bit bucket. Generally applicable double bottom formation core drills bits bucket wide range, single bottom applies only to tack a strong soil, two-door core drill bit formations suitable for a wide range of fighting, fighting only for single door core drill bit large diameter and pebbles hard clay.