CN101642823B - Spade drill insert having curved cutting edges - Google Patents
Spade drill insert having curved cutting edges Download PDFInfo
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- CN101642823B CN101642823B CN200910145763.4A CN200910145763A CN101642823B CN 101642823 B CN101642823 B CN 101642823B CN 200910145763 A CN200910145763 A CN 200910145763A CN 101642823 B CN101642823 B CN 101642823B
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Abstract
A spade drill insert and drilling tool assembly is provided wherein the spade drill insert body comprises curved cutting edges and a lip groove having a trough substantially parallel to a plane formed through each adjacent curved cutting edge, which provides a significant improvement in chip formation during cutting operations.
Description
Technical field
The present invention relates generally to a kind of spade drill insert, can be placed in tool retainer, for holing on metal.Particularly, can the present invention relates to a kind of spade drill insert with curved cutting edge, the significant improvement that provides the drilling cuttings of the spade drill insert to prior art to form.
Background technology
Bit system is often used in providing on metal works cylindrical hole.The cutting of bit system or boring behavior can by elongated basic be columniform boring bar tool, as drill bit keeper and spade drill insert assembly, spade drill insert is selectively connected on keeper.Then apply such mechanism, wherein one end of keeper is fixed firmly to drive unit, and it can make keeper rotate around its longitudinal axis.In the opposite end of elongated tool keeper, cutting plug-in unit engages the material cutting.Or can make workpiece rotate relative to keeper and cutting plug-in unit, as keeper is fixed on the tailstock of lathe or similar device.In addition, can make drill bit and workpiece all relatively rotate.Use chit drill cutting plug-in unit to allow quick-replaceable plug-in unit in the time of cutting surface wearing and tearing instead of whole bit wear, allow by providing for simple replacement of plug-in unit instead of whole drill bit assembly, make a drill bit for various boring occasion.
The feature of spade drill insert is, it is plane normally, has a pair of connecting surface parallel to each other that is positioned at plug-in unit opposite side, and the composition surface with keeper jig arm is provided.The front end of chit drill is generally provided with the cutting edge laterally forming mutually of pair of straight, has blunt V-arrangement.The rear end of spade drill insert or matrix are generally planes, are orthogonal to described a pair of connecting surface, can engage with the bottom that keeps groove.The side of the width of plug-in unit provides edge and the gap of plug-in unit.This edge is cylindrical, form around the rotation of chit drill, and in the time of drilling operation the side of contact hole.
The problem that the spade drill insert of prior art exists is that straight cutting edge can not effectively form and/or chip removal during holing.For the chit drill of prior art, because it has straight cutting edge, drilling cuttings radially outward forms outward towards plug-in unit.Another problem of prior art spade drill insert is to use gap, bight, and the cutting edge of outermost approaches blade center line, therefore close to neutrality or be not positive anterior angle geometry, particularly using when gap, excessive bight.So just cause the outer radius of spade drill insert effectively not cut.Another problem of prior art plug-in unit is that the drilling cuttings formation of straight cutting edge is not tight, and suitable cutting operation is carried out in this requirement, has formed the drill bit opereating specification narrowing.In addition, the geometry of the straight cutting edge of prior art chit drill is easily sent the sound, and this depends on the material of cutting and the intrinsic frequency of drill bit and system, under the constant speed expansion harmonic wave by different operating speed, forms and can cause along the drilling cuttings of rotationally symmetrical surf.It can make operator have to change the extremely non-optimized scope of operating condition of drilling program.
Summary of the invention
Chit drill of the present invention provides improved drilling cuttings to form.This that compared with prior art had and other advantages are provided by a kind of spade drill insert, it comprises drill insert main body, there is first end, the second relative end, first surface side, it is relative and be parallel to second surface side, and the first arete side, the second relative arete side, described the first and second arete sides form between end and face side; Wherein, the second end comprises at least two cutting edges that laterally form mutually, and each cutting edge is bending, and near each cutting surface cutting edge has formed groove, and the groove of described groove is basically parallel to the plane that adjacent cutting tooth shape becomes.
This that compared with prior art had and other advantages also provide by a kind of drilling tool assembly, this assembly comprises keeper, it has first end and the second end, wherein the second end comprises shank portion, be applicable to being firmly connected to drilling machine, first end comprises maintenance groove, and it has the basal surface that is positioned at least a portion maintenance groove; With at least one linking arm, be positioned at the side that keeps groove, wherein each linking arm has the hole that at least one forms thereon; And drill insert, it comprises drill insert main body, has first end, the second relative end, and first surface side, its relative second surface side, and the first arete side, the second relative arete side, described the first and second arete sides form between end and face side; Wherein, the first end of drill main body is generally plane, and the second end comprises at least two cutting edges that laterally form mutually, and described at least two cutting edges are bending; At least two holes form in each face side of drill insert main body, have formed groove in the face side of each drill insert main body of facing mutually cutting edge, and the groove of described groove is basically parallel to cutting edge.
Introduction by below and with reference to accompanying drawing, can have a clear understanding of these and other advantages of the present invention.
Brief description of the drawings
Introduce in detail the present invention and development thereof below with reference to the accompanying drawings and by the mode of embodiment, in accompanying drawing:
Fig. 1 is the decomposition installation diagram according to the drilling tool assembly of preferred embodiment;
Fig. 2 is the part perspective view of the keeper of assembly;
Fig. 3 A is according to the different views of the plug-in unit with curved cutting edge of the first embodiment of the present invention to Fig. 3 G;
Fig. 4 A is the different views of the plug-in unit with curved cutting edge according to a second embodiment of the present invention to 4E, wherein large than the first embodiment of the degree of crook of cutting edge;
Fig. 5 A is to show that Fig. 4 A is to the curved cutting edge of the plug-in unit of 4E and the different partial view of correlated characteristic to 5C;
Fig. 6 A is respectively partial plan and the part top view in cam ground arm of angle gap related to the present invention to 6B;
Fig. 7 A and 7B are respectively partial plan and the part top views that arm of angle gap is considered at angle related to the present invention to be worth doing.
Detailed description of the invention
Introduce now the preferred embodiments of the present invention, Fig. 1 has shown drilling tool assembly 10.Drilling tool assembly 10 comprises keeper 12, and it has main body 14 and head 16, and in a preferred embodiment, keeper 12 is normally cylindrical, has first end 20 and the second end 22.As shown in Figure 2, the first end 20 of keeper 12 has draw-in groove or keeps groove 30, and its whole diameter at head 16 extends, or the core of at least locating at the rotation 18 of keeper 12 extends.Keep groove 30 to have diapire 32, its position is orthogonal to the rotation 18 of keeper 12 substantially.In a preferred embodiment, drilling tool assembly 10 also comprises the prominent part in location or double pointed nail 24, its accurately relative rotation axi line 18 locate, and extend from the diapire 32 that keeps groove 30.Pin 24 can be fixed in hole 26, and extend along the rotation 18 of keeper main body downwards from the diapire 32 that keeps groove 30 in this hole, and hole and alignment pin 24 form interference fit.Or, in a preferred embodiment, comprise the prominent part in location of pin 24, can other mode realize the corresponding function of pin 24, as the single piece of extending from diapire 32.Drill insert 35, keeping relative keeper 12 in groove 30 accurately to locate, therewith realizes the drilling function of wishing.As introduced in more detail below, plug-in unit 35 has the structure of point geometry, comprises multiple cutting surfaces, and the rotation 18 of keeper 12 is accurately located relatively, the error while carrying out drilling operation to reduce drilling tool assembly 10.
More specifically, the preferred embodiment of keeper 12 shows at Fig. 2, and it can be arranged to comprise a pair of jig arm 34 that is positioned at first end 20, and it is around keeping groove 30 to extend.Jig arm 34 preferably includes hole 36, can hold screw element 38 (seeing Fig. 1), to drill insert 35 is fixed on to the appropriate location that keeps groove 30.In preferred structure, hole 36 is threaded, can connecting thread part 38, and it coordinates in a predefined manner with the screwed hole that drill insert 35 forms, and accurately locates the precalculated position of drill insert in keeping groove 30, as below by introducing more in detail of carrying out.Each jig arm 34 can comprise lubricant hole 28, and it allows to apply lubricant in the cutting surface of adjacent drill insert and it is flowed, and helps drilling operation.Jig arm 34 also can comprise inclination or curved surface, and the chip area 37 that drilling cuttings is passed through on the each side of keeper 12 is discharged.Also demonstrate basal surface 32, it is arranged to plane, corresponding to the planar base of preferred drill insert 35, although also can use the basal surface 32 of another kind of structure.It should be known that drill insert 35 sintered metallic hard material manufacture, as carbide, cermet, pottery, monocrystalline and polycrystalline diamond, or boron nitride.But drill insert 35 can be used high-speed steel.
To 3G, show the first embodiment of spade drill insert 35 with reference to figure 3A.Drill insert 35 comprises the cutting edge 64 that is positioned at upper surface, conventionally has the form of blunt V-arrangement, and cutting edge 64 is positioned on each side of chisel edge 62, and from coupling part, (web thin) 63 radially outward.Bending each cutting edge 64 forms in cutting edge plane, make plane that cutting edge 64 forms mutually transverse to, and form angle of slope.Cutting edge 64 is bending in direction of rotation.
Curved cutting edge 64 can comprise multiple cutting members, and as chip breaking mechanism 66, it is combined with cutting edge provides the hope of material cutting surface and/or boring application.This plug-in unit 35 also comprises a pair of connecting surface 68, is positioned at the opposite flank parallel to each other of plug-in unit 35, and the butting surface of keeper 12 jig arm 34 is provided.Groove 65, also can be called blade, forms, and have the groove that is generally parallel to relevant cutting edge plane in each connecting surface 68 of contiguous cutting edge 64.Groove 65 and curved cutting edge 64, in conjunction with positive axial and radial rake is provided, contribute to form drilling cuttings.The groove of groove 5 can be bending or straight line.When groove is straight line, groove 65 will be parallel to cutting plane, but cutting edge extends beyond the plane of the relevant surfaces side of drill insert main body, and straight-line groove has reaction to the intensity of cutting edge, and provides less radial rake along cutting edge 64.These problems can be passed through slight crooked groove, and the degree of depth that makes groove extends radially outwardly with it and reduces.When groove is bending, groove 65 is parallel to cutting edge 64 conventionally.No matter groove is bending, crooked or straight line, the groove of groove 65 all thinks to be basically parallel to the plane that adjacent cutting tooth shape becomes.
The bottom 72 of plug-in unit 35 is generally plane and is orthogonal to connecting surface 68.Bottom 72 also comprises locating slot 74, and it can coordinate with the pin of keeper 12 24.Drill insert 35 also comprises the hole 70 of connecting surface 68, and the hole 36 of this hole and jig arm 34 is fixed plug-in unit 35 in keeping groove 30, and is positioned at locating surface 32.In addition, hole 36 and 70 is preferably provided with counterbore part, become area supported in case with the corresponding inclination that is positioned at screw element or other fixtures 38 or similar surfaces combination.The chuck of the expansion of screw element 38 can have any shape easily, as taper, spherical, or other form, with the similar surfaces in corresponding drill bit keeper 12 and plug-in unit 35.In typical form, by the axis of offset hole 36 and 70, when screw element 38 fixing pluges 35 are during to maintenance groove 30, will make plug-in unit 35 come to basal surface 32 downwards.
Drill insert 35 is also included in arete or the side 80 on plug-in unit 35 width, and each side 80 comprises edge 82, is positioned at the radially inner clearance surface 84 of side end after 80s, is positioned near helical groove or the fluting 88 in edge 82 of plug-in unit 35 front sides 80.Edge 82 can be parallel spiral edge, has constant border width, from the cutting edge of plug-in unit 35 1 sides remain to plug-in unit 35 opposite sides position, show as Fig. 3 C is clear.Edge surface 82 is cylindrical, forms around the rotation 18 of plug-in unit 35, and the edge of contact boring.Helical margin 82 causes almost whole radial width contact holes of side 80, as the top view of Fig. 3 B is known demonstration.Therefore, drill insert 35 provides the stability higher than the spade drill insert of prior art.In addition, the minimizing of the comparable prior art of border width, will reduce plug-in unit side 80 like this due to fricative heat, and further like this bit life and/or the higher speed of permission drill bit operation of having improved ensures bit life simultaneously.
Plug-in unit 35 comprises near helical groove or the fluting 88 edge 82, and its helical form is positioned at the forward corner of spade drill insert 35.Fluting 88 can help the drilling cuttings in groove to leave hole, also can help drilling cuttings to form.In addition, fluting 88 can prevent that drilling cuttings is retained in the front side at edge 82.As mentioned above, the plug-in unit of prior art uses bits gap, angle, and the cutting edge of outermost approaches the center line of blade, therefore approaches neutral or is not positive anterior angle geometry, especially in the time utilizing big angle bits.In the present invention, fluting 88 upwards extends through blade, makes the cutting edge of the outermost of plug-in unit 35 keep more positive anterior angle geometry.Can make like this spade drill insert 35 more efficient than the cutting of the spade drill insert of prior art.
Cutting edge 64 is bending, and it is had outside positive axial rake, also has positive radial rake angle.Curved cutting edge 64 forms towards plug-in unit 35 center drilling cuttings, causes tighter drilling cuttings to form.Form by improved like this drilling cuttings, drill insert 35 can be with more speed (SFM) operation, can remain on and on ductile steel, form drilling cuttings simultaneously.Therefore increased rate of penetration.Bending cutting edge 64 also allows drill insert in larger velocity interval, to form and carry drilling cuttings, therefore, can more be widely used for problematic processing environment, as have the device of limited propulsion capability.Another advantage of curved cutting edge can be by reducing some prior aries the mode of resonance of the spade drill insert with linear cutting edge reduce the sound.
Curved cutting edge 64 also can carry out cutting edge processing, and as Fig. 3 F, 3G is clear to be shown, its sectional view and cutting edge that demonstrates plug-in unit 35 is processed 67 part detail drawing.Cutting edge processing is the K arete form with angle [alpha] that is applied to curved cutting edge.Should be appreciated that other swords processing also can be for curved cutting edge, as T arete, fine grinding etc.
With reference now to Fig. 4 A, to 4E, shown the spade drill insert 35` of the second embodiment, it has curved cutting edge 64`, with the radial rake increasing.Increasing curvature allows the different geometries of anterior angle to have more changeableization.
In embodiment above, curved cutting edge 64` does not extend beyond the extension plane of the connecting surface 68 of plug-in unit 35.As Fig. 5 A shows to 5C is clear, the curved cutting edge 64` of the increase radial rake of plug-in unit 35` extends beyond the extended surface of the connecting surface 68 of plug-in unit 35`.This feature allows the long cutting edge of Kong Yougeng of same diameter, by the processing along longer cutting edge expansion, can help to improve stock-removing efficiency, extends the life-span of cutting edge.Shake by eliminating the more multi resonant producing with drilling operation, the curved cutting edge of prolongation also contributes to further to reduce the sound.Another advantage of this feature is the end that parallel helical margin 82` is close to cutting edge 64`, therefore radially extends beyond the connecting surface 68 of plug-in unit 35`.Extra contact between hole and edge 82` is provided like this, has caused the stability of plug-in unit 35` to increase.
Should be appreciated that the curved cutting edge of being combined with plane spade drill insert is not limited to the shown feature of spade drill insert in literary composition, the structure of curved cutting edge can be in conjunction with the spade drill insert geometry of other particular types.Therefore, curved cutting edge feature can be independent of the connection of particular form, blade, and some gap, angle bits, corner radius etc., these can change between Different Plane type spade drill insert.For example, if Fig. 6 A is to as shown in 7B, dissimilar corner treatments can be related to the spade drill insert that there is no the curved cutting edge limiting.Shown the partial plan of insert corner at Fig. 6 A.Fig. 6 B has shown the part top view of insert corner, has jointly shown the gap, bight 90 of cam ground, is positioned on the plug-in unit with curved cutting edge.The partial plan of Fig. 7 A has shown insert corner, and Fig. 7 B is the part top view of insert corner, has jointly shown the second selectable bight gap 90` that is positioned at the plug-in unit with curved cutting edge.
Although introduce above with reference to the specific embodiment of the present invention, should know proposed the introduced embodiment that the invention is not restricted to, without departing from the scope of the invention can be used for above explanation but the non-embodiment limiting carries out some changes.
Claims (13)
1. a drill insert, comprising:
Drill insert main body, it has the first end relative with the second end, the first surface side relative with second surface side, the first arete side relative with the second arete side, and described the first arete side and described the second arete side form between described end and described face side;
Wherein, described the second end comprises at least two cutting edges that laterally form and extend to mutually described the first arete side and the second arete side, and wherein, each cutting edge is bending; And
Groove, forms near described groove each face side described cutting edge, and each groove has groove, and wherein, described groove is bending in its at least a portion, and is basically parallel to the plane that adjacent curved cutting edge forms.
2. drill insert according to claim 1, is characterized in that, described groove has along with this groove extends radially outward and the degree of depth that reduces.
3. drill insert according to claim 1, is characterized in that, described cutting edge has positive radial rake angle and positive axial rake.
4. drill insert according to claim 1, is characterized in that, at least a portion of each bending cutting edge extends beyond the plane of the corresponding face side of described drill insert main body.
5. drill insert according to claim 1, is characterized in that, each arete has edge, and described edge is formed with constant arc width between front side and tail side, makes described front side and tail side all be formed as spirality.
6. drill insert according to claim 1, is characterized in that, each arete has edge, and the front side at each edge is formed as spirality, and, near the described front side at each edge, form helical slot.
7. drill insert according to claim 6, is characterized in that, at least two holes form through each face side of described drill insert main body, and described helical slot radially outward forms from described hole.
8. drill insert according to claim 6, is characterized in that, described helical slot is crossing with the described groove in each face side of described drill main body.
9. a drill insert, it comprises:
Drill insert main body, it has: with the relative first end of the second end of at least two cutting edges, these at least two cutting edges laterally form mutually and extend to the arete side of described main body, each cutting edge is bending; The first surface side relative and parallel with second surface side; The first arete side relative with the second arete side; Described the first arete side and described the second arete side form between described end and described face side; And
Groove, forms near each face side of its described drill insert main body cutting edge, and described groove has groove, and groove is bending and be roughly parallel to the plane that adjacent curved cutting edge forms in its at least a portion.
10. drill insert according to claim 9, is characterized in that, described groove is parallel to described cutting edge conventionally.
11. drill insert according to claim 9, is characterized in that, described groove has along with this groove extends radially outward and the degree of depth that reduces.
12. 1 kinds of drilling tool assemblies, comprising:
Keeper, it has first end and the second end, and wherein, described the second end comprises the shank portion that is suitable for being fixedly connected on drilling machine, and described first end comprises: keep groove, described maintenance groove has the basal surface being positioned at least a portion maintenance groove; With at least one linking arm that is positioned at the each side that keeps groove, wherein each linking arm has the hole that at least one forms thereon; And
Drill insert, it comprises drill insert main body, described drill insert main body has the first end relative with the second end, the first surface side relative and parallel with second surface side, the first arete side relative with the second arete side, described the first arete side and described the second arete side form between described end and described face side, wherein, described the second end comprises: at least two curved cutting edges, and described at least two curved cutting edges laterally form mutually and extend to described arete side; At least two holes that form by each face side of described drill insert main body; And groove, near described groove each face side described cutting edge, forming, described groove has the groove of the plane that is roughly parallel to adjacent curved cutting edge formation.
13. boring bar tools according to claim 12, is characterized in that, described groove has along with this groove extends radially outward and the degree of depth that reduces.
Applications Claiming Priority (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US51855603P | 2003-11-07 | 2003-11-07 | |
| US60/518556 | 2003-11-07 | ||
| US60/518,556 | 2003-11-07 | ||
| US10/780133 | 2004-02-17 | ||
| US10/780,133 | 2004-02-17 | ||
| US10/780,133 US7018145B2 (en) | 2003-11-07 | 2004-02-17 | Spade drill insert having curved cutting edges |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004800327889A Division CN100513027C (en) | 2003-11-07 | 2004-11-04 | Spade drill insert having curved cutting edges |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101642823A CN101642823A (en) | 2010-02-10 |
| CN101642823B true CN101642823B (en) | 2014-07-09 |
Family
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Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004800327889A Active CN100513027C (en) | 2003-11-07 | 2004-11-04 | Spade drill insert having curved cutting edges |
| CN200910145763.4A Active CN101642823B (en) | 2003-11-07 | 2004-11-04 | Spade drill insert having curved cutting edges |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004800327889A Active CN100513027C (en) | 2003-11-07 | 2004-11-04 | Spade drill insert having curved cutting edges |
Country Status (1)
| Country | Link |
|---|---|
| CN (2) | CN100513027C (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1059138A (en) * | 1991-08-30 | 1992-03-04 | 机械电子工业部郑州磨料磨具磨削研究所 | Agglomerate of composite superhard material and manufacture method thereof |
| US5423640A (en) * | 1992-09-24 | 1995-06-13 | Sandvik Ab | Drill |
| CN2270593Y (en) * | 1996-05-30 | 1997-12-17 | 张晓岗 | Sheet alloy D-bit with spiral groove |
| US6514019B1 (en) * | 1998-07-31 | 2003-02-04 | Dr. Joerg Guehring | Boring tool comprising a replaceable cutting insert which is secured against detaching |
| US6551036B2 (en) * | 2000-11-30 | 2003-04-22 | Heinrich Heule | Drilling bit and holder for drilling bit |
| CN1125698C (en) * | 1999-08-18 | 2003-10-29 | 钴碳化钨硬质合金公司 | Flat drill and method for making same |
-
2004
- 2004-11-04 CN CNB2004800327889A patent/CN100513027C/en active Active
- 2004-11-04 CN CN200910145763.4A patent/CN101642823B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1059138A (en) * | 1991-08-30 | 1992-03-04 | 机械电子工业部郑州磨料磨具磨削研究所 | Agglomerate of composite superhard material and manufacture method thereof |
| US5423640A (en) * | 1992-09-24 | 1995-06-13 | Sandvik Ab | Drill |
| CN2270593Y (en) * | 1996-05-30 | 1997-12-17 | 张晓岗 | Sheet alloy D-bit with spiral groove |
| US6514019B1 (en) * | 1998-07-31 | 2003-02-04 | Dr. Joerg Guehring | Boring tool comprising a replaceable cutting insert which is secured against detaching |
| CN1125698C (en) * | 1999-08-18 | 2003-10-29 | 钴碳化钨硬质合金公司 | Flat drill and method for making same |
| US6551036B2 (en) * | 2000-11-30 | 2003-04-22 | Heinrich Heule | Drilling bit and holder for drilling bit |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1878633A (en) | 2006-12-13 |
| CN100513027C (en) | 2009-07-15 |
| CN101642823A (en) | 2010-02-10 |
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