CN2912944Y

CN2912944Y - Three-leaf whirlwind type straight spiral drill

Info

Publication number: CN2912944Y
Application number: CN 200620104307
Authority: CN
Inventors: 韩庆祥
Original assignee: ZHENGJIANG WANLI TOOLS GROUP CO Ltd
Current assignee: ZHENGJIANG WANLI TOOLS GROUP CO Ltd
Priority date: 2006-06-01
Filing date: 2006-06-01
Publication date: 2007-06-20
Anticipated expiration: 2016-06-01

Abstract

The utility model relates to a trefoil cyclone straight screw drill. The technical problem to be solved by the utility model is to provide with a trefoil cyclone straight screw drill with simple structure and fast drilling/cutting speed to make the drilling/cutting sharper and is more beneficial for the discharging of the wood chips and the drilled hole surface has a higher finish and a better roundness. The technique proposal of solving the problem of the utility model is that a trefoil cyclone straight screw drill includes a main cutting blade, a spiral groove, a central screw wimble and a drill handle; three spiral grooves are uniformly distributed with trefoil sections and are extended from one end of the drill handle to the bottom of the central screw wimble; each groove forms a main cutting blade at the end. The utility model can be used for drilling the wood material in the industry of civil engineering.

Description

Three leaf cyclone type Straight spiral drills

Technical field

The utility model relates to a kind of carpenter, and particularly a kind of three leaf cyclone type Straight spiral drills are mainly used in the boring of timber in the woodworking.

Background technology

In the prior art, similar products like is that the spiral shell head does not have the footpath Straight spiral drill, as shown in Figure 1 and Figure 2: it is fused by main cutting edge of cylindrical 1, spiral groove 2, center spiral shell nose cone 3, drillstock 4 etc. and forms, its spiral shell head plays centering and pre-drilling effect respectively in boring, main cutting edge cuts and holes, a spiral groove carries out chip removal, but this product penetration rate is slower, and circularity is relatively poor.

Summary of the invention

The technical problems to be solved in the utility model is: a kind of simple in structure, fireballing three leaf cyclone type Straight spiral drills of drilling are provided, and sharper when making drilling, be more conducive to the discharge of wood chip, the hole surface that gets out is highly polished, and circularity is better.

The technical scheme that the utility model adopted is: a kind of three leaf cyclone type Straight spiral drills, comprise main cutting edge, spiral groove, center spiral shell nose cone and drillstock, it is characterized in that described spiral groove has equally distributed three, its cross section is lobate, extend to the bottom of center spiral shell nose cone from an end of drillstock, each groove forms main cutting edge in its end.

Described drillstock is the hexagonal handle.

The beneficial effects of the utility model are: the utility model directly locates to have three lobate helicla flutes at the external diameter handle, and have three main cutting edges, during cutting, three main cutting edges carry out drilling simultaneously, three lobate helicla flute chip removals simultaneously, thus improved drilling speed greatly, sharper when making drilling, be more conducive to the discharge of wood chip, the hole surface fineness that gets out is higher, and circularity is better.

Description of drawings

Fig. 1 is the front view of the utility model background technology.

Fig. 2 is the vertical view of Fig. 1.

Fig. 3 is a front view of the present utility model.

Fig. 4 is the vertical view of Fig. 3.

The specific embodiment

As shown in Figure 3, Figure 4, present embodiment has main cutting edge 1, spiral groove 2, center spiral shell nose cone 3 and hexagon drillstock 4, in this example, described spiral groove 2 has equally distributed three, its cross section is lobate, extend to the bottom of center spiral shell nose cone 3 from an end of drillstock 4, each groove forms main cutting edge 1 in its end.

In drilling process, three main cutting edges 1 carry out drilling simultaneously, and three lobate helicla flutes 2 carry out chip removal simultaneously, and are sharper during drilling like this, be more conducive to dispel the heat and the discharge of wood chip, the hole surface fineness that gets out is higher, and circularity is better, and can reduce greatly because of heating causes bit life and shorten the generation of situation, described center spiral shell nose cone 3 plays centering and pre-drilling respectively, center spiral shell nose cone 3 produces a pulling force behind preboring, improve drilling speed, makes drilling more laborsaving.

Claims

1, a kind of three leaf cyclone type Straight spiral drills, comprise main cutting edge (1), spiral groove (2), center spiral shell nose cone (3) and drillstock (4), it is characterized in that: described spiral groove (2) has equally distributed three, its cross section is lobate, extend to the bottom of center spiral shell nose cone (3) from an end of drillstock (4), each groove forms main cutting edge (1) in its end.

2, three leaf cyclone type Straight spiral drills according to claim 1, it is characterized in that: described drillstock (4) is the hexagonal handle.