Nail-cutting wood drill

Abstract

The invention discloses a nail-cutting wood drill which is simple in structure, high in strength, high in drilling efficiency and capable of cutting off iron nails nailed in woods. The nail-cutting wood drill comprises a drill body. A cutting edge is arranged at the front end of the drill body, a spiral chip discharging groove is formed in the drill body, a drill handle for being clamped is manufactured at the tail end of the drill body, and a conical spiral point is manufactured at the front end of the center of the drill body. The nail-cutting wood drill is characterized in that the apex angle of the cutting edge is 180 degrees, the rake angle of a main cutting edge body at the edge ranges from 25 degrees to 30 degrees, and the clearance angle of the main cutting edge body at the edge ranges from 8 degrees to 10 degrees. According to the nail-cutting wood drill, as the apex angle of the cutting edge is 180 degrees, the component force during cutting is reduced, the effective torque during nail cutting is improved, the cutting performance on the nails is improved, meanwhile, a common side cutting edge body with low strength is eliminated, the rake angle and the clearance angle are reduced, the strength of the main cutting edge body is improved, and bearing steel which is high in quenching degree and rigidity is adopted. The nail-cutting wood drill has the advantages of being good in cutting comprehensive performance and high in strength, and can carry out drilling machining on various old woods possibly provided with the nails.

Description

technical field [0001] The invention belongs to woodworking tools, in particular to a nail-cutting woodworking drill for woodworking drilling. Background technique [0002] A common woodworking drill consists of a main cutting edge and a side cutting edge. The main cutting edge mainly cuts the wood in the middle of the hole, and the side cutting edge cuts the wall of the drilled hole to make the wall of the drilled hole smooth. Uniform and regular, because the materials drilled by woodworking drills are usually loose and not hard, their cutting edges are relatively sharp, the front and rear angles are large, and the angle between the front and rear cutter faces is small. The material for making the woodworking drill is only No. 45 steel, and the hardness after quenching is HRC45-48. However, in the use of drilling, especially when processing old wood, iron nails are often nailed on it. When ordinary woodworking drills encounter iron nails, due to the weak strength and hardn...

AI Technical Summary

Problems solved by technology

However, in the use of drilling, especially when processing old wood, iron nails are often nailed on it. When ordinary woodworking drills encounter iron nails, due to the weak strength and hardness of the blade, the blade will chip and the mouth will curl. Waiting to damage the cutting edge of the woodworking drill, causing the woodworking drill to be unusable, or the quality and efficiency of drilling to decrease

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