CN2454108Y

CN2454108Y - Wign-free zhiluo drill

Info

Publication number: CN2454108Y
Application number: CN 00268776
Authority: CN
Inventors: 韩庆祥
Original assignee: WANLI TOOLS GROUP CO Ltd ZHEJIANG PROV
Current assignee: WANLI TOOLS GROUP CO Ltd ZHEJIANG PROV
Priority date: 2000-12-30
Filing date: 2000-12-30
Publication date: 2001-10-17
Anticipated expiration: 2010-12-30

Abstract

The utility model relates to a wing-free support bolt drill. On the basis of an existing spiral point, an existing main cutting edge, and an existing knife rod, the wing-free support bolt drill is additionally provided with a subsidiary cutting edge, and the subsidiary cutting edge is connected with the main cutting edge via a right angle. As a consequence, the utility model has the advantages of reasonable structural design, unhindered chip removing, convenient processing, etc.

Description

No wing Zhiluo driller

The utility model relates to a kind of Zhiluo driller, particularly a kind of no wing Zhiluo driller, and it mainly is applicable on timber and holes.

Zhiluo driller structure of the prior art as shown in Figure 1, it all have flank heavy cut sword 3 ', whole Zhiluo driller by spiral shell point 1 ', flank heavy cut sword 3 ', main cutting edge 2 ' and the knife bar 4 of the band spiral goove that fuses ' form, this flank Zhiluo driller remains in actual use in following shortcoming: structural design is reasonable inadequately, have flank and make that the processing of spiral shell point is comparatively complicated, simultaneously, boring more easily forms the smear metal obstruction in the timber of tough and tensile humidity, and chip removal is unobstructed inadequately.

The purpose of this utility model is to overcome existing above-mentioned deficiency in the prior art, and a kind of reasonable in design, easy to process, no wing Zhiluo driller that chip removal is unobstructed are provided.

The purpose that the utility model proposed can be achieved through the following technical solutions: this no wing Zhiluo driller comprises spiral shell point, main cutting edge and knife bar, its design feature is also to have designed front cutting edge, this front cutting edge links to each other with the right angle with main cutting edge, and is formed with the bucket shape rake face on the relevant knife face of major and minor cutting edge.

The utility model is compared with existing technology, have the following advantages and effect: reasonable in design, be provided with flank and make the processing of spiral shell point more convenient, make the chip removal space of head more spacious simultaneously, even boring can not form the smear metal phenomenon of blocking yet in the timber of tough and tensile humidity, chip removal is unobstructed.

Description of drawings is as follows:

Fig. 1 is the structural representation of band wing Zhiluo driller in the prior art.

Fig. 2 is a front view of the present utility model.

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

Fig. 4 is a vertical view of the present utility model.

Following the utility model is incited somebody to action in conjunction with the accompanying drawings and comparative examples is described in further detail.

Referring to Fig. 2, Fig. 3, Fig. 4, the utility model is made up of spiral shell point 1, main cutting edge 2, front cutting edge 5 and knife bar 4, handle of a knife 6, it processes a bucket shape rake face 8 on the knife face that major and minor cutting edge 2,5 is correlated with, thereby form front (top) rake angle α and front top rake angle β, its transition portion that links to each other with chip removal ditch 7 on the cutter hub is processed into slick and sly surface, and main cutting edge 2 and front cutting edge 5 be the right angle each other.

During use, as the power that creeps into, spiral shell point 1 plays the location and drives the double action that drill bit advances by electric tool, and the effect of main cutting edge 2 is the timber that excavates in the hole, and the effect of front cutting edge 5 is to cut off the hole wall lumber fibre.

The utility model said " right angle " refers to the best right angle that is, it can also be an approximate right angle.

Claims

1, a kind of no wing Zhiluo driller, comprise spiral shell point, main cutting edge and knife bar, it is characterized in that: also design has front cutting edge (5), and this front cutting edge (5) links to each other with the right angle with main cutting edge (2), and is formed with bucket shape rake face (8) on the knife face that major and minor cutting edge (2), (5) are correlated with.