Novel hexagonal handle gang drill

Abstract

The invention provides a novel hexagonal handle gang drill. The novel hexagonal handle gang drill comprises a hexagonal drill handle, a twist-shaped drill rod and a drill tip. A connecting part is arranged on the end part of the drill rod and comprises an embedding part and a clamping part, and one end of the embedding part is shorter than the clamping part, so that a supporting face is formed at the joint; an inner hole matched with the connecting part is formed in the drill handle, and a step face abutting against the supporting face is arranged in the inner hole; and at least one first chip separating groove is formed in the rear tool face of the drill tip in a surrounding mode, second chip separating grooves correspondingly connected with the first chip separating grooves are formed in the two front tool faces, and chip separating blades are arranged at the two ends of each second chip separating groove.

Description

Technical field [0001] The present invention belongs to the technical field of tools, and specifically, it is involved in a twist drill, especially a new hexagonal group. Background technique [0002] The hexagonal drill bit includes a hexagonal connecting handle and a drill bit, and there is a mounting hole on the hexagonal gating handle, and the drill bit is inserted into the mounting hole and connected to the hexagonal connection. In order to avoid the drill bit from the hexagonal galvan joint, the hexagonal connection and the drill bit are connected to the hexagonal junction and the drill bit after the drill bit is inserted into the hexagonal connecting handle after the drill bit is inserted into the hexagonal connection. For example, in CN 206009943 U Among the opening of the drill handle, there is a diameter larger than the mounting hole of the tail of the drill bit, and then insert the tail of the drill bit into the mounting hole, and then fill the solid-holding layer in t...

AI Technical Summary

Problems solved by technology

In order to prevent the drill bit from falling off from the hexagonal connecting handle, in the traditional technology, after the drill bit is inserted into the hexagonal connecting handle, the hexagonal connecting handle and the drill bit are connected and fixed by bonding or riveting with glue, as in CN 206009943 U Among them, a mounting hole with a diameter larger than the cylindrical tail of the drill bit is opened in the center of the drill shank, and then the tail of the drill bit is inserted into the mounting hole, and then the gap between the tail of the drill bit and the mounting hole is filled with a holding glue layer for fixing, while The stem of the above-mentioned hexagonal shank drill bit is smooth and cylindrical, which is easy to cause slipping and jamming, which affects work efficiency

[0003] Moreover, the main edge of the existing twist drill bit is long and the chips are wide. The speed at which the chips flow out at each point differs greatly. In CN 203459719 U, although chip splitting grooves are set on the flank, the chisel edge has not been improved. The chisel edge is too long and has a large edge angle, which cannot completely solve the problem of chip removal when the drill bit is cutting

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