CN202655694U - E2-type twist drill and straight fluted drill with cutting angle - Google Patents
E2-type twist drill and straight fluted drill with cutting angle Download PDFInfo
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- CN202655694U CN202655694U CN 201220372939 CN201220372939U CN202655694U CN 202655694 U CN202655694 U CN 202655694U CN 201220372939 CN201220372939 CN 201220372939 CN 201220372939 U CN201220372939 U CN 201220372939U CN 202655694 U CN202655694 U CN 202655694U
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Abstract
The utility model provides an E2-type twist drill and straight fluted drill with cutting angle, which comprises a drill sheet main body, wherein the top end of the drill sheet main body is provided with a V-shaped cutting part with a left cutting edge and a right cutting edge; two sides of each of the left cutting edge and the right cutting edge are respectively provided with a left front cutting surface, a left rear cutting surface, a right front cutting surface and a right rear cutting surface; and the outer sides of the left front cutting surface and the right front cutting surface are respectively provided with a first auxiliary cutting surface and a second auxiliary cutting surface. A front cutting edge formed by the left front cutting surface and the right rear cutting surface, a rear cutting edge formed by the left rear cutting surface and the right front cutting surface and a middle cutting edge formed by the left rear cutting surface and the right rear cutting surface do not stay on the same straight line, so that the left cutting edge and the right cutting edge are additionally provided with a positive rake angle, so that the chip rolling capacity and the chip breaking capacity can be enhanced, and the working efficiency is improved. The length of a contact line between a drill point of a drill sheet and a machined surface is reduced, so that the positioning effect of the drill point can be guaranteed, and the machining efficiency is further improved.
Description
Technical field
The utility model relates to the bit technique field, specifically is applicable to a kind of E2 type fluted drill and the straight-flute drill with the cutting angle of the boring of metal and materials for wall and reaming.
Background technology
Drill bit is to go out through hole or blind hole in order to drilling on solid material, and can be to the cutter of existing hole reaming.Drill bit commonly used mainly contains fluted drill, chit drill, centre drill, depth drill, straight-flute drill and cylindrical drill.
In the prior art, YS/T78-1994 People's Republic of China (PRC) non-ferrous metal industry standard (hereinafter to be referred as " smelting mark ") E2 type fluted drill and straight-flute drill are as shown in Figure 1, this brill sheet is pentagon, apex point consists of for intersecting two sections that are 116 ° of angles, two surfaces all have left plane 1, cutting face 2 and right plane 3 on the brill sheet thickness direction, left plane 1 and cutting face 2 angle of cut angles are 120 degree, and left plane 1, cutting face 2 and right plane 3 intersect at apex point.Before and after two surperficial left planes 1 parallel to each other, two surperficial right planes 3, front and back are parallel to each other, cutting face 2 is about boring the sheet Central Symmetry in two surfaces, front and back.This brill chip size is short, good rigidly, and apex point is solid, and its high strength and high rigidity are so that it can process linearity and all good holes of circularity; And the straight trough that is arranged on outer surface provides a direct passage for the outer hole of cutting discharge.Yet, when this bores sheet work, because being intersected by two sections, apex point forms, control bits smear metal ability, and particularly especially true during material preferably in processing ductility, thus cause working (machining) efficiency low; And the apex point end is the straight lines that two sections intersect to consist of, and is the line contact so that bore contacting between sheet apex point and machined surface, and contact line length is long, and the apex point that bores sheet easily slides, and locating effect is poor, has further affected working (machining) efficiency; And the cutting edge that bores sheet at first contact with processed body, and easily the phenomenon of cutter is collapsed in generation, thereby has affected cutting-tool's used life and result of use.In addition, brill sheet side angle is larger, in the High Rotation Speed process, can also cause boring the problem of sheet lateral wearing, has had a strong impact on the service life of boring sheet.
The utility model content
For this reason, to be solved in the utility model is smelting mark E2 type fluted drill and the low technical problem of straight-flute drill working (machining) efficiency, and a kind of E2 type fluted drill and straight-flute drill with the cutting angle is provided.
For solving the problems of the technologies described above, the technical solution adopted in the utility model is as follows:
A kind of E2 type fluted drill and straight-flute drill with the cutting angle is provided, comprises and bore the sheet body, the top of described brill sheet body is provided with the reverse V-shaped cutting portion with left cutting edge and right cutting edge; Described left cutting edge both sides are provided with left front cutting face and left back cutting face, and described right cutting edge both sides are provided with right front cutting face and right back cutting face; Also comprise the first assisted machining face that is arranged on the outside, described left front cutting face and the second assisted machining face that is arranged on the outside, described right front cutting face; Described left front cutting face and junction, described right back cutting face form front cutting edge, and described left back cutting face and junction, described right front cutting face form rear cutting edge, and described left back cutting face and junction, right back cutting face form middle cutting edge; Described front cutting edge, described rear cutting edge and described middle cutting edge are all not point-blank.
The angle in described left back cutting face and described right back cutting face is 116 degree.
The side angle in described left front cutting face and left back cutting face is the 25-45 degree.
The side angle in described right front cutting face and right back cutting face is the 25-45 degree.
The side angle in described left front cutting face and left back cutting face is 30 degree, and the side angle in described right front cutting face and right back cutting face is 30 degree.
Described brill sheet body is the brill sheet body that Hardmetal materials is made.
Technique scheme of the present utility model has the following advantages compared to existing technology:
The top of described brill sheet body is provided with the V-type cutting portion with left cutting edge and right cutting edge; Described left cutting edge both sides are provided with left front cutting face and left back cutting face, and described right cutting edge both sides are provided with right front cutting face and right back cutting face; Described front cutting edge, described rear cutting edge and described middle cutting edge all not point-blank so that the cutting to left and right sword has all increased a positive rake angle, have not strengthened its volume bits and chip breaking ability, thereby have improved operating efficiency.And the setting of staggering of described left cutting edge and right cutting edge, the contact line length that bores sheet apex point and work piece diminishes, even is the some contact, has reduced the apex point of brill sheet with respect to the slip of work piece, has guaranteed the locating effect of apex point, has improved working (machining) efficiency.And the contact line length that bores sheet apex point and work piece diminishes, when boring sheet work, be equivalent to apex point and process first a starter hole, like this, the apex point center at first enters starter hole, just can avoid because of the larger cutting edge of fragility at first contact with workpiece cause collapse the cutter phenomenon.
And the side angle in described left front cutting face and left back cutting face is 30 degree, and the side angle in described right front cutting face and right back cutting face is 30 degree, so that the side angle reduces, has reduced the problem of boring the sheet lateral wearing, has improved the whole service life of alloy.
Described brill sheet body adopts Hardmetal materials to make, and intensity is high, long service life.
Description of drawings
For content of the present utility model is more likely to be clearly understood, the below is described in further detail the utility model, wherein according to specific embodiment of the utility model also by reference to the accompanying drawings
Fig. 1 is the three-view diagram of smelting mark E2 type fluted drill and straight-flute drill;
Fig. 2 is the three-dimensional structure diagram of an embodiment of the utility model;
Fig. 3 is the front view of Fig. 2;
Fig. 4 is the profile of A-A face among Fig. 3;
Fig. 5 is the top view of Fig. 3;
Fig. 6 is the upward view of Fig. 3.
Reference numeral is expressed as among Fig. 2-6: 1-bores among sheet body, the left cutting edge of 2-, the left front cutting face of 21-, the left back cutting face of 22-, the right cutting edge of 3-, the right front cutting face of 31-, the right back cutting face of 32-, the reverse V-shaped cutting portion of 4-, the 5-before cutting edge, the 51-cutting edge, 61-the first assisted machining face, 62-the second assisted machining face behind cutting edge, the 52-.
The specific embodiment
Below in conjunction with the drawings and specific embodiments a kind of E2 type fluted drill and straight-flute drill with the cutting angle of the present utility model is described further:
Shown in Fig. 2-6, be the structural representation of an embodiment of the utility model, it comprises brill sheet body 1, the top of described brill sheet body 1 is provided with the reverse V-shaped cutting portion 4 with left cutting edge 2 and right cutting edge 3; Described left cutting edge 2 both sides are provided with left front cutting face 21 and left back cutting face 22, and described right cutting edge 3 both sides are provided with right front cutting face 31 and right back cutting face 32; The side angle in described left front cutting face 21 and left back cutting face 22 is 30 degree, and the side angle in described right front cutting face 31 and right back cutting face 32 is 30 degree.When boring sheet work, strengthened its volume bits and chip breaking ability, thereby improved operating efficiency.And the side angle diminishes, and reduced the problem of boring the sheet lateral wearing, improved the whole service life of alloy.
Described left front cutting face 21 arranged outside the first assisted machining face 61, described right front cutting face 31 arranged outside the second assisted machining face 62; Described left front cutting face 21 and 32 junctions, described right back cutting face form front cutting edge 51, described left back cutting face 22 and 31 junctions, described right front cutting face form rear cutting edge 52, and described left back cutting face 22 forms middle cutting edge 5 with 32 junctions, right back cutting face; Described front cutting edge 51, described rear cutting edge 52 and described middle cutting edge 5 are all not point-blank, the setting of staggering of described left cutting edge and right cutting edge, the contact line length that bores sheet apex point and work piece diminishes, even be the some contact, reduced and bored the apex point of sheet with respect to the slip of work piece, guarantee the locating effect of apex point, improved working (machining) efficiency.And the contact line length that bores sheet apex point and work piece diminishes, when boring sheet work, be equivalent to apex point and process first a starter hole, like this, the apex point center at first enters starter hole, just can avoid because of the larger cutting edge of fragility at first contact with workpiece cause collapse the cutter phenomenon.
Described left back cutting face 22 is 116 degree with the angle in described right back cutting face 32.
Described brill sheet body 1 adopts Hardmetal materials to make, and intensity is high, long service life.
As other embodiment of the present utility model, the side angle in described left front cutting face and left back cutting face and the side angle in described right front cutting face and right back cutting face can be unspecified angle in the 25-45 degree scope.
As other embodiment of the present utility model, Hardmetal materials can be used the material substitutions such as tool steel, diamond compact (PDC).
Obviously, above-described embodiment only is for example clearly is described, and is not the restriction to embodiment.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here need not also can't give all embodiments exhaustive.And the apparent variation of being extended out thus or change still are among the protection domain of the present utility model.
Claims (5)
1. E2 type fluted drill and straight-flute drill with a cutting angle comprise and bore sheet body (1), and the top of described brill sheet body (1) is provided with the reverse V-shaped cutting portion (4) with left cutting edge (2) and right cutting edge (3); Described left cutting edge (2) both sides are provided with left front cutting face (21) and left back cutting face (22), and described right cutting edge (3) both sides are provided with right front cutting face (31) and right back cutting face (32); Also comprise the first assisted machining face (61) that is arranged on the outside, described left front cutting face (21) and the second assisted machining face (62) that is arranged on the outside, described right front cutting face (31); It is characterized in that: described left front cutting face (21) and junction, described right back cutting face (32) form front cutting edge (51), described left back cutting face (22) and junction, described right front cutting face (31) form rear cutting edge (52), and described left back cutting face (22) forms middle cutting edge (5) with junction, right back cutting face (32); Described front cutting edge (51), described rear cutting edge (52) and described middle cutting edge (5) are all not point-blank.
2. E2 type fluted drill and straight-flute drill with the cutting angle according to claim 1 is characterized in that: described left back cutting face (22) is 116 degree with the angle in described right back cutting face (32).
3. E2 type fluted drill and straight-flute drill with the cutting angle according to claim 2, it is characterized in that: the side angle of described left front cutting face (21) and left back cutting face (22) is the 25-45 degree, and the side angle of described right front cutting face (31) and right back cutting face (32) is the 25-45 degree.
4. E2 type fluted drill and straight-flute drill with the cutting angle according to claim 3, it is characterized in that: the side angle of described left front cutting face (21) and left back cutting face (22) is 30 degree, and the side angle of described right front cutting face (31) and right back cutting face (32) is 30 degree.
5. E2 type fluted drill and straight-flute drill with the cutting angle according to claim 4, it is characterized in that: described brill sheet body (1) is the brill sheet body (1) that Hardmetal materials is made.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220372939 CN202655694U (en) | 2012-07-30 | 2012-07-30 | E2-type twist drill and straight fluted drill with cutting angle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220372939 CN202655694U (en) | 2012-07-30 | 2012-07-30 | E2-type twist drill and straight fluted drill with cutting angle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202655694U true CN202655694U (en) | 2013-01-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220372939 Expired - Fee Related CN202655694U (en) | 2012-07-30 | 2012-07-30 | E2-type twist drill and straight fluted drill with cutting angle |
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| CN (1) | CN202655694U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104368848A (en) * | 2014-11-10 | 2015-02-25 | 苏州阿诺精密切削技术股份有限公司 | Reaming auger bit for continuous platform |
| CN104384577A (en) * | 2014-11-10 | 2015-03-04 | 苏州阿诺精密切削技术股份有限公司 | Multi-operating-condition twist drill bit |
-
2012
- 2012-07-30 CN CN 201220372939 patent/CN202655694U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104368848A (en) * | 2014-11-10 | 2015-02-25 | 苏州阿诺精密切削技术股份有限公司 | Reaming auger bit for continuous platform |
| CN104384577A (en) * | 2014-11-10 | 2015-03-04 | 苏州阿诺精密切削技术股份有限公司 | Multi-operating-condition twist drill bit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130109 Termination date: 20130730 |