CN2912945Y

CN2912945Y - Three-leaf three-wing whirlwind type straight spiral drill

Info

Publication number: CN2912945Y
Application number: CN 200620104308
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 three-wing cyclone straight screw drill which solves the technical problem of that the utility model provides with a trefoil three-wing cyclone straight screw drill with fast drilling/cutting speed and more effort-saving operation and further makes the surface of the drilled holes have a higher finish, a better roundness and the wood chips are discharged more smoothly. The technique proposal of solving the problem of the utility model is that: the trefoil three-wing cyclone straight screw drill includes a main cutting blade, a spiral groove, a single-wing, a central screw wimble and a drill handle. The utility model is characterized in that three spiral grooves are uniformly distributed with trefoil sections and the sections are leaf-shaped 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 and is respectively provided with a independent wing. The utility model can be used for drilling the wood material in the industry of civil engineering.

Description

Three leaf three wings cyclone type Straight spiral drills

Technical field

The utility model relates to carpenter, especially a kind of three leaf three wings cyclone type Straight spiral drills.Be applicable to the boring of timber in woodworking.

Background technology

In the prior art, similar products like is that single-blade has the footpath Straight spiral drill, as shown in Figure 1 and Figure 2, it by main cutting edge of cylindrical 1, spiral groove 2, one independently single-blade 3, center spiral shell nose cone 4, drillstock 5 etc. fuse and form, its center spiral shell nose cone plays centering and pre-drilling effect respectively in boring, independently single-blade 3 plays the hole shape of pre-drilling delineation timber in drilling, so that a main cutting edge 1 of back cuts and holes, a spiral groove 2 carries out chip removal.But this twist bit penetration rate is slower, and circularity is relatively poor.

Summary of the invention

The technical problems to be solved in the utility model is: provide a kind of drilling speed fast, operate more labour-saving three leaf three wings cyclone type Straight spiral drills, and further make the hole surface fineness that gets out higher, circularity is better, wood chip is discharged more smooth and easy.

The technical scheme that the utility model adopted is: three leaf three wings cyclone type Straight spiral drills comprise main cutting edge, spiral groove, single-blade, 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 plane at place, spiral shell nose cone bottom, center from an end of drillstock, each groove forms main cutting edge in its end, and respectively sets up an independently single-blade.

Described drillstock is the hexagonal handle.

The beneficial effects of the utility model are: this twist bit precedence centre spiral shell nose cone produces a pulling force behind preboring, can improve drilling speed like this; With a main cutting edge of traditional product, spiral groove, one independently single-blade be improved to independently single-blade of equally distributed three main cutting edges, three lobate helicla flutes, three, so drilling Geng Feng, more laborsaving, the hole surface that gets out is bright and clean, circularity is good, three spiral groove chip removals simultaneously make the discharge of wood chip very smooth and easy.

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 comprises main cutting edge 1, spiral groove 2, single-blade 3, center spiral shell nose cone 4 and drillstock 5, the characteristics of present embodiment are that spiral groove 2 has equally distributed three, its cross section is foliaceous, extend to the plane at place, spiral shell nose cone 4 bottom, center from an end of hexagonal drillstock 5, each groove forms main cutting edge 1 in its end, and respectively sets up an independently single-blade 3 at the cylindrical place.

The utility model three three single-blades 3 that are positioned at main cutting edge 1 place when drilling carry out preboring and the hole shape of delineation boring on timber simultaneously, three main cutting edges 1 carry out drilling simultaneously then, three lobate helicla flutes 2 carry out chip removal simultaneously, the hole surface fineness that gets out like this is higher, circularity is better, drilling is sharper, is more conducive to wood chip and discharges.Precedence centre spiral shell nose cone 4 produces a pulling force behind preboring, can improve drilling speed, makes drilling more laborsaving.

Claims

1, a kind of three leaf three wings cyclone type Straight spiral drills, comprise main cutting edge (1), spiral groove (2), single-blade (3), center spiral shell nose cone (4) and drillstock (5), it is characterized in that: described spiral groove (2) has equally distributed three, its cross section is lobate, extend to the plane at place, center spiral shell nose cone (4) bottom from an end of drillstock (5), each groove forms main cutting edge (1) in its end, and respectively sets up an independently single-blade (3).

2, three leaf three wings cyclone type Straight spiral drills according to claim 1, it is characterized in that: described drillstock (5) is the hexagonal handle.