Rotary bisection drill

Abstract

The invention discloses a rotary bisection drill. The rotary bisection drill comprises an outer drill bit which is adaptive to a first driving shaft and rotates around a rotary center along a first direction and an inner drill bit which is adaptive to a second driving shaft and rotates around the rotary center along a direction which is opposite to the rotating direction of the outer drill bit; the first driving shaft and the second driving shaft are concentric; the outer drill bit and the inner drill bit comprise bit bodies and cutting edges; the cutting edges are arranged at the same end of the outer bit body and the inner bit body; the cutting edges of the outer drill bit and the inner drill bit form into rotary bisection movement along with rotation of the drill bits. The rotary bisection drill has the advantages of being efficient in drilling, strong in self-advancing capability, free of impact vibration, self-balancing in cutting force, stable and reliable and applicable to rapid drilling for concrete, stone, wood, metal and geological drilling.

Description

technical field [0001] The invention relates to a rotary counter-cutting drill, which belongs to the field of drilling tools and equipment. Background technique [0002] Existing drilling technology mainly contains two kinds of modes: drill bit drilling with unidirectional rotation and rotary cutting. One-way rotary drilling inevitably reverses the impact, and the self-advancement ability is poor, requiring a lot of forward pressure and anti-torsion force; although one-way impact drilling can solve the problem of self-advancement for some materials, it is very noisy , not suitable for large-diameter drilling. Rotary cutting is a multi-head drill that follows the spindle and rotates at the same time. The complex structure is suitable for large-diameter drilling, but it cannot be realized for small-diameter drilling. The market urgently needs a high-efficiency drilling, strong self-propelled ability, small positive pressure, no impact vibration, self-balancing cutting force,...

AI Technical Summary

Problems solved by technology

One-way rotary drilling inevitably reverses the impact, and the self-advancement ability is poor, requiring a lot of forward pressure and anti-torsion force; although one-way impact drilling can solve the problem of self-advancement for some materials, it is very noisy , not suitable for large hole drilling

Rotary cutting is a multi-head drill that follows the spindle and rotates at the same time. The structure is complex and suitable for large-aperture drilling, but it cannot be realized for small-aperture drilling.

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