CN2768932Y - Drilling bit structure with cutting blade - Google Patents

Abstract

The utility model relates to a drill bit structure with a cutting edge, which comprises a drill point, a conical top part, a head part, a cutting part, a swarf guiding slot and a drill body, wherein the drill point is the head end vertex of a pointed conical point; the stripe of the conical top part is arranged beneath the drill point; the stripe of the head part is connected with the cylindrical body positioned behind the conical top part; the stripe of the cutting part is provided with a couple of edge parts on the conical top part by halving, and each edge part extends a sword cutting angle downwards along the conical top part; the swarf guiding slot extends along the conical top part from the drill point to an inclined plane on the head part; the stripe of the drill body is connected with the head part and provided with at least one swarf removing spiral line. A swarf removing slope extending from the drill point to the bottom of the sword cutting part is arranged between a shaving face and the drill point, so that the drilling accuracy (anti-slid), the drilling and cutting ability and the swarf removing ability can be improved.

Description

The drill bit structure of tool cutting blade

Technical field

The utility model relates to the cutting power structure-improved to drill bit, refers to especially bore the drill bit that point is the apex point of any relevant for a kind of being modified to.

Background technology

The drill bit of traditional drilling operation is shown in Fig. 1 (a), Fig. 1 (b), and its drill bit 10a comprises the cutting portion 20a and brill body 30a of a column type, bores body 30a an a pair of helical groove 40a and a clamping part 50a are provided.This clamping part 50a fixes for the chuck of boring bar tool.The cutting portion 20a of drill bit 10a is generally taper shape, and the tip is a mound line 21a, and extends a pair of radially opposite blade 22a thus, and the extending part of this blade 22a also joins with helical groove 40a.

Above-mentioned general drill bit 10a is because this cutting portion 20a forms great boring resistance for taper shape when digging into workpiece and easily cause the brill point to slide, make drilling efficiency unclear, add that escaping bits designs bad, the detritus that boring cutting portion 20a is dug out can't effectively discharge and stay and cause bigger resistance in the boring, and bore operation is caused the secondary resistance.

Again because apex point public as that contact with work is a mound line 21a, when the contact workpiece, the location of its drilling construction easily produces sliding phenomenon and is difficult for accurately, often causes bore position generation error with this mound line 21a.

The utility model content

In view of the above-mentioned all disappearances of known drill bit, the utility model designer is with this industry of many decades experience, and the utility model is developed in research and development voluntarily, pains test finally.The utility model also can be produced automatically via automation, reach the characteristic of one-stop operation, one-body molded and high speed volume production, be a brand-new design, a kind of drill bit of promoting the boring degree of accuracy, drilling ability, heat-sinking capability and chip removal ability of brand new.

Primary and foremost purpose of the present utility model is providing a kind of drill bit structure that has more efficient, is positioned at the leading edge of drill bit with it, and is the apex point on the head end summit of a pointed cone point, comes accurate locating hole position; Increase heat-sinking capability with its cone top part; The drilling ability is promoted at blade and cutting angle with its cutting portion; Reach the drill bit of high heat radiation and high chip removal power with its dregs guiding groove.

Description of drawings

Fig. 1 (a) is the vertical view of known drill bit.

Fig. 1 (b) is the front view of Fig. 1 (a).

Fig. 2 is a stereogram of the present utility model.

Fig. 3 is the vertical view of Fig. 2.

Fig. 4 is the front view of Fig. 2.

The primary clustering symbol description

The 10a drill bit

20a cuts the portion of drawing

21a mound line

The 22a blade

30a bores body

40a chip removal helical

1 drill bit

10 apex points

20 cone top parts

21 cone angles

30 heads

40 cutting portions

41 blades

42 cutting angles

50 dregs guiding grooves

60 bore body

61 chip removal helicals

Lead angle contracts in 62

The specific embodiment

Now conjunction with figs. is described in detail as follows the utility model preferred embodiment.

Consult Fig. 2, stereogram of the present utility model.Its drill bit 1 comprises at least:

One apex point 10 is positioned at the leading edge of drill bit, and is the head end summit of a pointed cone point.

One cone top part 20 is located under this apex point 10, and the cone angle 21 of its vertex of a cone is greater than 90 degree, is the angle of attack of preferable drill bit 1 when spending and be made as 105 approximately.

One head 30, accept this cone top part 20 after, the downward column that is provided with;

A pair of cutting portion portion 40 offers a pair of blade 41 in this cone top part 20, and this extends cutting angles 42 to blade 41 downwards along this cone top part 20.

One dregs guiding groove 50, certainly this apex point 10 along this cone top part 20 to inclined-plane that this head 30 is offered.

One bores body 60, accepts this head 30 with the lead angle 62 that contracts in, has at least one chip removal helical 61.

The continuous Fig. 3 and shown in Figure 4 that sees also, according to above-mentioned member, after this drill bit 1 is sandwiched in the chuck (not shown) of electric tool, the beginning cutting workpiece, at this moment, this apex point 10 that is a point-like can get out an anchor point exactly on workpiece, afterwards, 41 pairs of these workpiece of blade by cutting portion 40 set on this cone top part 20 pierce again, and further dig deeply by these cutting portion 40 blades 41 adjacent cutting angles 42, apace this detritus is imported in the chip removal helical 61 that bores body 60 by this dregs guiding groove 50 again, and take the surface of the work of this boring out of by this chip removal spiral shell, green 61.

Moreover the designed structure of the utility model is in drilling process, and the cone top part 20 of this drill bit 1 is in contact workpiece and rotate in the process of this dregs guiding groove 50, can form a splendid thermolysis.

From the above, the brill point that the utility model improves known drill bit really slides, brill stroke workpiece is slow excessively, reach the not enough former disappearance of chip removal, has met the patent application important document.Only the above person only is a preferred embodiment of the present utility model, is not to be used for limiting the utility model practical range.Be that all equalizations of being done according to the utility model claim change and modification, be all the utility model claim and contain.

Claims (3)

1. the drill bit structure of a tool cutting blade is characterized in that, comprises:

One apex point is the head end summit of a pointed cone point;

One cone top part is located at and is formed a cone angle under this apex point;

One head, accept this cone top part after, the downward column that is provided with; A pair of cutting portion, in a pair of blade that this cone top part is offered branch, this extends a cutting lead angle to blade downwards along this cone top part;

A pair of dregs guiding groove, the inclined-plane offered along this cone top part to this head of this apex point certainly; And one bore body, accepts this head, has at least one chip removal helical.

2. drill bit structure as claimed in claim 1 is characterized in that, this cone angle of this cone top part is greater than 90 degree.

3. as claim 1 a described drill bit structure, it is characterized in that this head has the lead angle that contracts in the joining place that bores body.

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