Replaceable staggered tooth composite drill

• Main Authors: REN JUNXUE, NI GAOMING, ZENG TAO, ZUO XIAOCHEN, WANG SHEQUAN
• Format: Patent
• Language: Chinese; English
• Published: 23.09.2022
• Subjects: BORING; MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR; PERFORMING OPERATIONS; TRANSPORTING; TURNING

The invention relates to a replaceable staggered tooth composite drill which comprises a first chamfering blade, a second chamfering blade, a replaceable drill bit, a cutter bar and locking screws, the cutter bar comprises a cutter groove and a chip groove, the replaceable drill bit is connected with the cutter bar in an elastic connection mode, and the first chamfering blade and the second chamfering blade are installed on the cutter groove through the locking screws. According to the replaceable staggered-tooth composite drill, the included angle A1 between the first chamfering blade and the center shaft and the included angle A2 between the second chamfering blade and the center shaft are both equal to A2, and it is guaranteed that the chamfering angles are consistent. When A1 is equal to A2, r1 is equal to r2 and is equal to 0.5 * d, L1 is not equal to L2, the first chamfering blade and the second chamfering blade are of a staggered tooth structure, it is guaranteed that the drilling depths before and aft