CN203711944U - Durable drill - Google Patents
Durable drill Download PDFInfo
- Publication number
- CN203711944U CN203711944U CN201320461545.3U CN201320461545U CN203711944U CN 203711944 U CN203711944 U CN 203711944U CN 201320461545 U CN201320461545 U CN 201320461545U CN 203711944 U CN203711944 U CN 203711944U
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- drill
- drill bit
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Abstract
The utility model relates to a durable drill. The drill comprises a screw groove, wherein the bottom of the groove adopts an arc-shaped structure, and the depth of the groove is 15% to 60% of the diameter of the drill; a taper angle of 43 to 36 degrees is formed in the shoulder of the drill. On the basis of the common twist drill, the durable drill disclosed by the utility model is characterized in that the structures of the screw groove and the shoulder of the drill are processed deeply, the stress, the tensile strength and the yield strength of the drill are improved, the durability is obviously improved, and compared with the common twist drill, the service life is improved by at least 1.5 times (generally 2 to 5 times).
Description
Technical field
The utility model relates to a kind of cutter for hole processing, relates in particular to a kind of drill bit, is applicable to various materials to carry out hole processing, has durability.
Background technology
Drill bit is that a class goes out through hole or blind hole in order to drilling on solid material, and can carry out to existing hole the general name of the cutter of reaming.Its conventional kind is as fluted drill, chit drill, depth drill, reamer and centre drill etc.
At present conventional spiral bit is in working angles, while especially the materials such as high temperature alloy and glass hard steel being carried out to cutting drilling, often due to chip removal frangibility not, cause cooling fluid to be difficult to arrive drill bit tip, and causing drill bit tip overheated, too high temperature badly influences the service life of cutter.Especially the drill bit tip shoulder of linear velocity maximum often damages at first, causes drill edge heel and toe wear and breaks, and then causing cutter to fracture killing, cause workpiece to scrap or even mechanical accident.
In order to improve the heat radiation of drill bit tip, to alleviate cutter shoulder, cross the phenomenon of cause thermal damage, a kind of method is leaned on outer radius rake face of reconditioning again in helicla flute rake face one side of fluted drill; Another kind method is at drill body, cooling bath to be set to help cooling fluid arrival drill bit tip.Although these methods have played thermolysis to a certain extent, effect is also not obvious, also can cause the generation of phenomenons such as causing that because reduce cutter sharpness machine torque warning and processing are scrapped in reality processing.
For the defect of above-mentioned technology, proposed cold U in a kind of clip type and bored.It not only can carry out by inner Cooling Holes cooling to cutter, the more allowing blade replacement once tip weares and teares, but still there is more defect, and as: its complex structure precision prescribed is high, involves great expense; More allowing blade replacement need to be debugged repeatedly by special-purpose tool setting gauge, wastes time and energy, and additionally has high input; Machining accuracy is not as integral (drill) bit, and workpiece is easily overproof; The range of work is limited, can not produce
in following frame, cold U bores.Therefore, still can not obtain a kind of suitable technical scheme, to solve this technical problem.
Chinese utility model patent ZL201120368930.4 discloses a kind of technical scheme of inner cold spiral-hole twist drill from applying cooling fluid to accelerate the cooling angle of drill bit.On drillstock, offer a radial direction through hole, this radial direction through hole is communicated with the cross through hole on drillstock, offers two spiral-shaped orifices that be communicated with radial direction through hole and parallel to each other on drill body.Thus, make cooling fluid or lubricating fluid directly through drill body inside, reach drill bit tip, not only cooling more abundant, improved bit life, also contribute to chip removal.But this kind bores work in-process and has certain difficulty, and the structure of hollow, has also reduced bit performance to a certain extent.
Chinese utility model patent ZL200620050587.8 discloses a kind of solid drill, chip area is by the planarea being smoothly connected successively, towards the first recessed concave surface of peripheral direction, from level and smooth the second concave surface extending of the first concave surface, form from level and smooth the 3rd concave surface extending of the second concave surface with from the level and smooth convex surface extending of the 3rd concave surface, improved chip area had both guaranteed that cutting edge obtained enough intensity, reduced again cutting force, volume bits, chip breaking and chip removal in boring procedure are rationally controlled, realize level and smooth and stable drilling, excellent cutting performance and durability are high.
Chinese invention patent application 201110106816.9 reconditioning on the rear knife face of drill bit main cutting edge goes out groove, make to form near one section of main cutting edge of apex point the cutting edge of J-shaped, the cutting edge of J-shaped forms with the intersections of complex curve of the main cutting edge of close drill margin the middle part blade tip that is positioned at main cutting edge middle part.Apex point is by cross reconditioning, and making the core of apex point part, thick to be less than other part cores thick, make simultaneously chisel edge anterior angle γ be one on the occasion of angle, near one section of land reconditioning of apex point, form angle, a rear flank α who is greater than 0 degree.Obtain thus a kind of high cutting ability edge twist drill, can make drilling cuttings thinner, chip removal is more smooth, and is easy to cooling.
The structural design of 201310042445.1 pairs of drill edges of Chinese invention patent application is explored, and has proposed the technical scheme of a kind of main cutting edge segmentation, the asymmetric fluted drill of cutting edge height.Its technical way is by two main cutting edge segmentations, and makes the cutting edge height on same circumference asymmetric; Wherein a main cutting edge is divided into one section for protruding sword, and another section is recessed sword; Another main cutting edge on same circumference corresponding one section be recessed sword, another section is protruding sword.Thus, this Structure Decreasing axial resistance and the moment of torsion in boring procedure, make minute bits and chip removal more smooth and easy, further improve drilling efficiency and drill bit durability.
Chinese utility model patent ZL200520075503.1 has proposed a kind of minute bits powerful drill of tricuspid seven tooth shapes from reducing drilling drag aspect, comprise and bore core, rear heel, sword lobe and rear ditch rib, at sword lobe, be between crescent arc groove, sword lobe and rear heel, to have a trapezoidal or main sword face of triangle, rear ditch rib is processed into through reconditioning after Planar Quadratic, intersects and forms sword lobe plane with brill core.This brill type has been owing to having reduced drilling drag, is convenient to cutting fluid and flows into cutting region, reduced drilling heat, reduced the temperature on cutting edge, and the wearing and tearing that alleviated cutting edge have improved the durability of drill bit, have improved production efficiency, have improved chip removal chip breaking situation.But its complicated structure has brought difficulty not only to drill bit reconditioning processing, has also increased processing and manufacturing cost.
Aspect improving the heat radiation of fluted drill and extending the processing life-span, some is directly sent to cooling fluid outside drill bit tip, or the structure of chip area is improved, and by improving cutting ability, has increased the life-span of drill bit.Overwhelming majority prior aries all concentrate on the reconditioning again of drill bit blade or knife face and design, and obtain a kind of new technical scheme that is conducive to cooling, chip breaking and increases the service life.
Utility model content
An object of the present utility model is to provide a kind of durable type drill bit, on the basis of the fluted drill of applying in routine, by the cooperation of a plurality of partial structurtes, processes, and not only solves drill bit heat radiation, the problem that extends the processing life-span.
Another object of the present utility model is to provide a kind of durable type drill bit, on the basis of the fluted drill of routine application, by the processing to partial structurtes, obtains manufacturing simple and easy, reliable and takes into account the cutter of use cost.
Another object of the present utility model is to provide a kind of durable type drill bit, on the basis of the fluted drill of applying in routine, by the processing to partial structurtes, obtain a kind of textural association processed material of difference to versatility, make the different processed materials of drill bit processing all can there is the features such as rapid heat dissipation and processing life.
These drill bits that the utility model provides comprise an elongated bodies member, there is a longitudinal axis, can be installed to the shank on rotating machinery, at least two helicla flutes and a cutting termination (or claims: drill bit), the sharp angle that cutting termination has 125 degree-145 degree, at least contains two cutting edges.
The embodiment of a kind of durable type drill bit that the utility model provides, is a kind of durable type fluted drill, and it also comprises helicla flute, and its trench bottom is arcuate structure.
Its quantity of spiral fluted is preferably selected 2-4, as: 2,3 or 4.
The spiral fluted degree of depth is 15%～60% of bit diameter.
Drill bit shoulder, is provided with the taper angle that 43 degree-36 are spent.
The embodiment of the another kind of durable type fluted drill that the utility model provides, it also comprises
2-4 the degree of depth is the helicla flute of bit diameter 15%～60%, and each helicla flute comprises rake face, trench bottom and rear groove face.The side that helicla flute groove face is connected with cutting edge is rake face, and it also comprises the part of the face extending to spiral fluted bottom land.Trench bottom is for connecting the arcuate structure of rake face and rear groove face.
Drill bit shoulder, is provided with the taper angle that 43 degree-36 are spent.
In the utility model, the preferential trench bottom of selecting, it is arc structure, radius (r) scope has 0.6mm-10mm, more preferably 0.6mm-6mm, or be selected from the arbitrary scope of 0.6mm-2.0mm, 2.0mm-4.0mm, 4.0mm-6.0mm and 6.0mm-10.0mm.Concrete, as: but be not limited only to 0.6, 0.7, 0.8, 0.9, 1.0, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8, 1.9, 2.0, 2.1, 2.2, 2.3, 2.4, 2.5, 2.6, 2.7, 2.8, 2.9, 3.0, 3.1, 3.2, 3.3, 3.4, 3.5, 3.6, 3.7, 3.8, 3.9, 4.0, 4.1, 4.2, 4.3, 4.4, 4.5, 4.6, 4.7, 4.8, 4.9, 5.0, 5.1, 5.2, 5.3, 5.4, 5.5, 5.6, 5.7, 5.8, 5.9, 6.0, 6.1, 6.2, 6.3, 6.4, 6.5, 6.6, 6.7, 6.8, 6.9, 7.0, 7.1, 7.2, 7.3, 7.4, 7.5, 7.6, 7.7, 7.8, 7.9, 8.0, 8.1, 8.2, 8.3, 8.4, 8.5, 8.6, 8.7, 8.8, 8.9, 9.0, 9.1, 9.2, 9.3, 9.4, 9.5, 9.6, 9.7, 9.8, 9.9 and 10.0.
In the utility model, the preferential taper angle of selecting, its applicable length is 0.1mm-6mm, or is selected from 0.1mm-2.0mm, 2.0mm-4.0mm and the arbitrary scope of 4.0mm-6.0mm.Concrete, as: but be not limited only to 0.1,0.2,0.3,0.4,0.5,0.6,0.7,0.8,0.9,1.0,1.1,1.2,1.3,1.4,1.5,1.6,1.7,1.8,1.9,2.0,2.1,2.2,2.3,2.4,2.5,2.6,2.7,2.8,2.9,3.0,3.1,3.2,3.3,3.4,3.5,3.6,3.7,3.8,3.9,4.0,4.1,4.2,4.3,4.4,4.5,4.6,4.7,4.8,4.9,5.0,5.1,5.2,5.3,5.4,5.5,5.6,5.7,5.8,5.9 and 6.0.
The beneficial effect that technical solutions of the utility model realize:
The utility model durable type drill bit, on the basis of common fluted drill, structure to helicla flute and drill bit shoulder two places is carried out deep processing, improve drill bit stress, drawn high intensity and yield strength, significantly improved durability high, service life, comparable common fluted drill improved at least 1.5 times (being generally 2-5 doubly).
The utility model durable type drill produced is simple and easy, and the producer of fluted drill can produce conventionally, without special technique and lathe.Its cost performance is high, and cost is equal to common fluted drill, can be mass-produced and use, and significantly reduces use cost.
The combination processing of the partial structurtes that the utility model durable type drill bit carries out, can also be applicable to the rapidoprints such as the high temperature alloy that conventionally cannot process and glass hard steel, quenched and tempered steel, makes the range of application expanded of drill bit of this kind of structure and universal.
Accompanying drawing explanation
Fig. 1 is the transverse integral structural representation of the utility model durable type drill bit one embodiment;
Fig. 2 is the radially structure for amplifying schematic diagram of the drill bit of the utility model durable type shown in Fig. 1;
Fig. 3 is the radially structure for amplifying schematic diagram of another embodiment of the utility model durable type drill bit.
The specific embodiment
Below in conjunction with accompanying drawing, describe the technical solution of the utility model in detail.The utility model embodiment is only unrestricted in order to the technical solution of the utility model to be described, although the utility model is had been described in detail with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, can modify or be equal to replacement the technical scheme of utility model, and not departing from the spirit and scope of technical solutions of the utility model, it all should be encompassed in claim scope of the present utility model.
Fig. 1 is the transverse integral structural representation of the whole embodiment of the utility model durable type drill bit, and as shown in Figure 1, this drill bit has a longitudinal axis 100, can be installed to shank on rotating machinery 200, cutting axial region 400 and a cutting termination 300.Cutting termination 300 has the sharp angle A of 125 degree-145 degree, at its shoulder, is provided with taper angle 310, and the scope of its angle C is 43 degree-36 degree, and length B scope is 0.1mm-6mm.
Fig. 2 is the radially structure for amplifying schematic diagram of drill bit shown in Fig. 1, and Fig. 3 is the radially structure for amplifying schematic diagram of another embodiment of the utility model durable type drill bit.In conjunction with Fig. 1, as shown in Figures 2 and 3, the cutting bar portion 400 of the utility model durable type drill bit, generally comprises 2-4 bar helicla flute 410, comprises rake face 411, trench bottom 412 and rear groove face 413, and rake face is be connected with the cutting edge part of a side of helicla flute groove face.Helicla flute is the continuous cell body that is arranged in a spiral manner cutting axial region, and any radial section of cutting axial region includes at least one trench bottom 412, and corresponding have a groove depth.In the present embodiment, each spiral fluted degree of depth should be understood to cutting axial region to carry out any radial section, and the groove depth of section is 15%～60% with respect to the diameter of the cutting axial region at this place.
It is arc structure for trench bottom 412, and the radius having is 0.6mm-10mm.In the present embodiment, the matching relationship that prior applicability trench bottom arc structure is tangent with boring core 420.The present embodiment, in rear groove face 413 and cutting axial region outer rim 430 junctions, adopts the transition structure of fillet (referring to Fig. 2) or wedge angle (referring to Fig. 3).
The various drill bits that the present embodiment provides, in cutting, the bottom land of accurately controlling connects circular arc and guarantees that smear metal disconnects smoothly, can not hinder cooling fluid to enter apex point part, thereby reduced the temperature of drill bit shoulder, easy the to be cooling chamfering of shoulder has increased drill bit shoulder and contact area cooling fluid, thus the working life that more extends shoulder.Both actings in conjunction of complementing each other, have greatly improved the cooling effect of drill bit, thereby have extended the working time, greatly reduce cutter consumption and product rejection phenomenon in difficult-to-machine material.
Following table 1 has been listed the processing characteristics contrast situation under the durable type fluted drill hole depth conditions different from common fluted drill that the present embodiment makes, table 2 has been listed durable type fluted drill that under different processing conditions and machined parameters, embodiment makes and the durable contrast situation of common fluted drill, and table 3 has been listed durable type fluted drill that under different processed materials, embodiment makes and the machinability situation of common fluted drill.
Contrast test under the different hole depth conditions of table 1
| Test event | Machined parameters | Durable type fluted drill | Common fluted drill |
| 3D through hole | 80m/min*0.18mm/rev | 104 holes, wearing and tearing | 52 holes, tipping |
| 3D blind hole | 80m/min*0.18mm/rev | 115 holes, wearing and tearing | 60 holes, fracture |
| 5D through hole | 80m/min*0.18mm/rev | 29 holes, tipping | 14 holes, tipping |
| 5D blind hole | 80m/min*0.18mm/rev | 32 holes, tipping | 18 holes, fracture |
From table 1, to compare with common fluted drill, the drill bit that the present embodiment provides all shows more durable nearly 2 times in the lead to/blind hole processing to identical material (with the 45# steel) degree of depth.
Processing contrast under the different processing conditions of table 2
From table 2, compare with common fluted drill, the drill bit that the present embodiment provides, in identical material (45# steel) is carried out to hole processing with different processing conditions, all show more durable, at least 1.5 times.
The machinability contrast of table 3 different materials
| Material | Durable type fluted drill | Common fluted drill |
| 45# steel | Can process, the life-span is long | Can process, the life-span is short |
| Hardened steel | Can process, the life-span is normal | Can not process, the life-span is very short |
| Nodular cast iron | Can process, the life-span is long | Can process, the life-span is short |
| Vermicular cast iron | Can process, the life-span is long | Can process, the life-span is very short |
| High temperature alloy | Can process, the life-span is normal | Can not process, the life-span is very short |
| Silumin | Can process, the life-span is normal | Can not process, the life-span is very short |
| Fine copper | Can process, the life-span is normal | Can process, the life-span is short |
From table 3, the various bit technique schemes that the present embodiment provides, can better be adapted to the processing of various material, especially several specialty metal materials (hardened steel, high temperature alloy and silumin) and all have higher service life, have effectively extended the service life of common fluted drill.
Claims (7)
1. a durable type drill bit, comprises helicla flute and a drill bit, it is characterized in that
Described helicla flute, its trench bottom is arc structure, radius has 0.6mm-10mm;
Described drill bit shoulder, is provided with the taper angle that 43 degree-36 are spent.
2. durable type drill bit according to claim 1, the length that it is characterized in that described taper angle is 0.1mm-6mm.
3. a durable type drill bit, comprises helicla flute and a drill bit, it is characterized in that
Described helicla flute, its trench bottom is arc structure, radius has 0.6mm-10mm;
Described drill bit shoulder, is provided with the taper angle that 43 degree-36 are spent, and length is 0.1mm-6mm;
The described spiral fluted degree of depth is bit diameter 15%～60%.
4. according to the durable type drill bit described in claim 1 or 3, it is characterized in that described spiral fluted quantity is 2-4.
5. according to the durable type drill bit described in claim 1 or 3, it is characterized in that described radius is selected from the arbitrary scope of 0.6mm-2.0mm, 2.0mm-4.0mm, 4.0mm-6.0mm and 6.0mm-10.0mm.
6. according to the durable type drill bit described in claim 1 or 3, it is characterized in that described length is selected from 0.1mm-2.0mm, 2.0mm-4.0mm and the arbitrary scope of 4.0mm-6.0mm.
7. according to the durable type drill bit described in claim 1 or 3, the sharp angle that it is characterized in that described drill bit is 125 degree-145 degree.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320461545.3U CN203711944U (en) | 2013-07-30 | 2013-07-30 | Durable drill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320461545.3U CN203711944U (en) | 2013-07-30 | 2013-07-30 | Durable drill |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203711944U true CN203711944U (en) | 2014-07-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320461545.3U Expired - Lifetime CN203711944U (en) | 2013-07-30 | 2013-07-30 | Durable drill |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203711944U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104338976A (en) * | 2013-07-30 | 2015-02-11 | 上海名古屋精密工具股份有限公司 | Durable drill |
| CN107000073A (en) * | 2014-12-09 | 2017-08-01 | 罗伯特·博世有限公司 | Boring bar tool |
-
2013
- 2013-07-30 CN CN201320461545.3U patent/CN203711944U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104338976A (en) * | 2013-07-30 | 2015-02-11 | 上海名古屋精密工具股份有限公司 | Durable drill |
| CN107000073A (en) * | 2014-12-09 | 2017-08-01 | 罗伯特·博世有限公司 | Boring bar tool |
| CN107000073B (en) * | 2014-12-09 | 2019-12-17 | 罗伯特·博世有限公司 | Drilling tool |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20221118 Address after: 611833 Block B, No. 6 Jinteng Road, Dujiangyan Economic Development Zone, Chengdu, Sichuan Patentee after: CHENGDU YUJU SCIENCE & TECHNOLOGY Co.,Ltd. Address before: 201801 Fanjia village, Malu Town, Jiading District, Shanghai Patentee before: SHANGHAI NAGOYA PRECISION TOOLS Co.,Ltd. |
|
| TR01 | Transfer of patent right | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140716 |
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| CX01 | Expiry of patent term |