CN100478107C - Spade drill insert having helical margins - Google Patents
Spade drill insert having helical margins Download PDFInfo
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- CN100478107C CN100478107C CNB2004800326354A CN200480032635A CN100478107C CN 100478107 C CN100478107 C CN 100478107C CN B2004800326354 A CNB2004800326354 A CN B2004800326354A CN 200480032635 A CN200480032635 A CN 200480032635A CN 100478107 C CN100478107 C CN 100478107C
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Abstract
A spade drill insert and drilling tool assembly is provided wherein the lands of the spade drill insert have helical margins which provide increased stability during cutting operations. The margin may have a helical trailing side or leading side, a parallel helical margin, or may also include a gullet or flute adjacent the helical margin.
Description
Technical field
The present invention relates generally to a kind of spade drill insert, can place tool retainer, is used for holing on metal.Particularly, the present invention relates to a kind of spade drill insert, the stability in the time that cutting operation can being improved with helical margin.
Background technology
Bit system is often used in providing on the 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 selectively is connected on the keeper.Such mechanism uses then, and wherein an 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, the material that the contact of cutting plug-in unit is cut.Perhaps, workpiece is rotated, as keeper is fixed on the tailstock of lathe or similar device relative to keeper and cutting plug-in unit.In addition, drill bit and workpiece are all relatively rotated.Use chit drill cutting plug-in unit to allow when cutting surface wearing and tearing rather than whole bit wear, to change plug-in unit fast, allow to make a drill bit be used for various boring occasion by providing for simple replacement of plug-in unit rather than whole drill bit assembly.
The feature of spade drill insert is, it is the plane normally, has a pair of connection surface that is positioned at plug-in unit opposite side parallel to each other, and the composition surface with the keeper jig arm is provided.The front end of chit drill generally is provided with a pair of horizontal cutting edge, has blunt V-arrangement.The tail end of spade drill insert or matrix generally are the planes, are orthogonal to described a pair of connection surface, can engage with the bottom that keeps groove.Side on the width of plug-in unit can be described as arete, connects the edge of near surface before comprising, with the back gap that is connected near surface of plug-in unit.This edge is cylindrical, and the rotation that centers on chit drill forms, and can engage the side in the hole of cutting.The width at edge approximately is 1/4 to 1/3 of a plug-in unit width, and the rotation of parallel spade drill insert, and the cutting edge side on width forms.The remainder of side is a clearance surface, and it is radially inside from the edge, makes it can not contact the hole of processing.
The problem that the spade drill insert of prior art exists is that the very path that has only width side has reduced the stability of chit drill like this to partly contacting with the hole, and can produce the too much sound when the material that cutting is selected.Another problem that the spade drill insert with big edge of some prior aries exists is, the side friction in edge surface district and hole when chit drill rotates causes extra heat accumulation at plug-in unit, and this need reduce cutting speed, and can shorten the life-span of plug-in unit.
Summary of the invention
The purpose of this invention is to provide a kind of drill insert with improved drilling operational stability.
The invention provides a kind of drill insert, comprising: the drill insert main body, it has first end, second opposed end, the first surface side, it is relatively and be parallel to the second surface side, with the first arete side, the second relative arete side, the described first and second arete sides form between end and face side; And at edge that the part of each arete side forms, described edge has front side and tail side, each face side in the drill insert main body is formed with at least one hole, first end of described drill insert main body forms a surface, in order to when drill insert is used and a surface engagement of keeper, it is characterized in that the front side at described each edge forms spirality.
A kind of drill insert comprises: the drill insert main body, and it has first end, opposite second end, the first surface side, it is relatively and be parallel to the second surface side, the first arete side, the second relative arete side, the first and second arete sides form between end and face side; It is characterized in that first end of drill insert main body is the plane, it has at least one recess that forms at first end; Second end comprises at least two curved cutting edges, laterally forms mutually; Each face side in the drill insert main body forms at least one hole; With the edge that forms in the part of each arete side, this edge has front side and tail side, wherein, the rear side at each edge forms spirality, the front side at each edge forms spirality, and screw slotting forms near the front side at each edge, and wherein screw slotting forms in the position radially outward in hole.
A kind of drill insert comprises: the drill insert main body, and it has first end, opposite second end, the first surface side, it is relatively and be parallel to the second surface side, the first arete side, the second relative arete side, this first and second aretes side forms between end and face side; And at the edge that the part of each arete side forms, the edge has front side and tail side; It is characterized in that the rear side at each edge forms spirality, the front side at each edge forms spirality, forms constant arc width between the front side at described edge and the tail side, and at least a portion of each arete side extends to the corresponding face side of plug main body from the front side at edge.
A kind of drill insert comprises: the drill insert main body, and it has first end, second opposed end, the first surface side, it is relatively and be parallel to the second surface side, the first arete side, the second relative arete side, the first and second arete sides form between end and face side; One rotation; With the edge that forms in the part of each arete side, this edge has front side and tail side; It is characterized in that the tail side at each edge forms spirality, the front side at this edge extends to the face side of plug main body, makes the front side at edge and tail side form acute angle, and it is equal to helical angle.
By following introduction with can know with reference to the accompanying drawings and understand these and other advantages of the present invention.
Description of drawings
Introduce the present invention and development thereof in detail below with reference to the accompanying drawings and by the mode of embodiment, in the accompanying drawing:
Fig. 1 is the decomposition installation diagram according to the drilling tool assembly of first embodiment;
Fig. 2 is the part perspective view of the keeper of assembly;
Fig. 3 A is a different views according to the plug-in unit with helical margin of the first embodiment of the present invention to Fig. 3 E;
Fig. 4 A is the different views of the plug-in unit with parallel spiral edge according to a second embodiment of the present invention to 4E;
Fig. 5 A is the different views of the plug-in unit of a third embodiment in accordance with the invention to 5E, and plug-in unit has parallel helical margin and preceding release groove;
Fig. 6 A, 6B are respectively the partial plan and the part top views in gap, limit, cam ground bight related to the present invention;
Fig. 7 A and 7B are respectively the partial plan and the part top views in gap, limit, corner clips bight related to the present invention.
The specific embodiment
Introduce the first embodiment of the present invention now, Fig. 1 has shown drilling tool assembly 10.Drilling tool assembly 10 comprises keeper 12, and it has main body 14 and head 16.In first embodiment, keeper 12 has cylindrical usually, has first end 20 and second end 22.As shown in Figure 2, 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 at rotation 18 places of keeper 12 extends at least.Keep groove 30 to have diapire 32, its position is orthogonal to the rotation 18 of keeper 12 substantially.In an illustrated embodiment, assembly 10 also comprises prominent part in location or double pointed nail 24, and its relative axis 18 is accurately located, and extends from the diapire 32 that keeps groove 30.Pin 24 can be fixed in the hole 26, and extend to the axis 18 of lower edge keeper main body from the diapire 32 of groove 30 in this hole, and hole and alignment pin 24 form interference fit.Perhaps, in the embodiment shown, the prominent part in location that comprises pin 24 mode in addition is provided with, and realizes the corresponding function of pin 24, as the single piece from diapire 32 extensions.Drill insert 35 relative keeper 12 in keeping groove 30 is accurately located the common drilling function of realizing hope.As below introducing in more detail, plug-in unit 35 has the structure of point geometry, comprises a plurality of cutting surfaces, and the axis 18 of its relative keeper 12 is accurately located, the error when carrying out drilling operation to reduce assembly 10.
More specifically, first embodiment of keeper 12 shows that at Fig. 2 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 (see figure 1)s, so that drill insert 35 is fixed on the appropriate location of maintenance groove 30.Shown in the structure, hole 36 is threaded, but connecting thread spare 38, its screwed hole with drill insert 35 cooperates in a predefined manner, accurately to locate the precalculated position of drill insert in keeping groove 30, as the more detailed introduction that below will carry out.Each jig arm 34 can comprise lubricant hole 28, and it allows to apply lubricant to the cutting surface of adjacent drill insert with it is flowed, and helps cutting operation.Jig arm 34 can comprise also tilting or curved surface that the chip area 37 that makes drilling cuttings pass through on keeper 12 each side is discharged.Also demonstrate the basal surface 32 of being arranged to the plane, it is corresponding to the base plane of drill insert 35, though also can use the basal surface 32 of another kind of structure.Should be known in drill insert 35 sintered metallic hard material manufacturing, as carbide, cermet, pottery, monocrystalline and polycrystalline diamond, or boron nitride.But drill insert 35 can be used high-speed steel.
To 3F, shown first embodiment of spade drill insert 35 with reference to figure 3A.Drill insert 35 comprises cutting edge 64, and it is positioned at upper surface, has the form of blunt V-arrangement usually, and cutting edge 64 is positioned at each side of chisel edge 62, and (web thin) 63 radially outward from the coupling part.Cutting edge 64 can comprise a plurality of cutting structure spares, and as chip breaking mechanism 66, it combines with cutting edge can provide the hope of material cutting surface and/or boring to use.This plug-in unit 35 also comprises a pair of connection surface 68, is positioned at the opposite flank parallel to each other of plug-in unit 35, and the butting surface with the jig arm 34 of keeper 12 is provided.The bottom 72 of plug-in unit 35 generally is the plane, is orthogonal to connect surface 68.Bottom 72 also comprises locating slot 74, and it can cooperate with the pin 24 of keeper 12.Drill bit assembly 35 also comprises the hole 70 that connects on the surface 68, and this hole combines with the hole 36 of jig arm 34, and fixing pluge 35 is in maintenance groove 30, and is positioned at basal surface 32.In addition, hole 36 and 70 preferably is provided with the counterbore part, becomes area supported, so that combine with the corresponding tilt or the similar surfaces of screw element or other fixtures 38.The chuck of the expansion of screw element 38 can have any shape easily, and as taper, sphere, or other form are with the similar surfaces of corresponding drill bit keeper 12 and plug-in unit 35.In canonical form,, when arriving groove 30, will make plug-in unit 35 come to basal surface 32 downwards with screw element 38 fixing pluges 35 by the axis of offset hole 36 and 70.
With reference now to Fig. 4 A, to 4E, shown the spade drill insert 35` of the second embodiment of the present invention, it comprises parallel helical margin 82`, and wherein the front side at edge also is a spiral.The difference of the parallel helical margin 82` and first embodiment is, is provided with helical relief 86, makes border width remain to the back position of another example of plug-in unit 35` from the cutting edge of the side of plug-in unit 35`, shows as Fig. 4 C is clear.The helical relief 86 of adding has reduced the contact zone between plug-in unit 35` and the hole, has so just reduced the friction between plug-in unit 35` and the hole, thereby has reduced operating temperature and allow higher speed (SFM) or creep into speed, and can increase life tools.Parallel helical margin 82` also cause side 80` almost all radial width can contact hole, show as the top view of Fig. 4 B is clear.Therefore, drill insert 35` provides better more stable than prior art spade drill insert.In addition, the minimizing of the comparable prior art of border width can reduce the heat that the side 80` of plug-in unit produces like this, and the life-span and/or the permission instrument that can further increase instrument are operated with more speed, keep the life-span of instrument simultaneously.
With reference now to Fig. 5 A, to 5E, the spade drill insert 35`` of the third embodiment of the present invention comprises parallel helical margin 82``, and it has screw slotting or groove 88 near the edge 82``.Fluting 88 can help the drilling cuttings in the groove to leave the hole, and can help drilling cuttings to form.In addition, fluting 88 can prevent that drilling cuttings is retained in the front of helical margin, and this may occur in some occasion of processing with the plug-in unit 35`` of second embodiment.The parallel helical margin 82`` contact hole on the almost whole radial width of side 80`` of fluting 88 not overslaughs is set, shown in the top view of Fig. 5 B.High stability that plug-in unit 35`` can keep front embodiment to provide is provided for this.Fluting 88 is positioned at the 70 radially outer places from the hole, makes the standard connection be maintained.As in the previous examples, border width can be than the minimizing of prior art, to reduce like this because the heat that the side 80`` of friction plug 35`` produces, so just increased life tools and/or the permission instrument is operated, the service life that can keep instrument simultaneously under high speed.
Should be appreciated that the helical margin that combines with the plane spade drill insert is not limited to the shown feature of spade drill insert in the literary composition, the structure of helical margin can be in conjunction with the spade drill insert geometry of other particular types.Therefore, helical margin can be independent of the coupling part of particular form, blade, and the some gap, corner clips, corner radius etc., these can change between Different Plane type spade drill insert.For example, to shown in the 7B, dissimilar corner treatments can be set to the spade drill insert of unqualified helical margin as Fig. 6 A.Fig. 6 A has shown the partial plan of insert corner.Fig. 6 B has shown the part top view of insert corner, demonstrates the gap, bight 90 of cam ground jointly, is positioned on the plug-in unit with helical margin.The partial plan of Fig. 7 A has shown insert corner, and Fig. 7 B is the part top view of insert corner, demonstrates the second selectable bight gap 90` that is positioned at the plug-in unit with helical margin jointly.
Although top reference specific embodiment of the present invention is introduced, should know the embodiment that the invention is not restricted to of being proposed introduced, can carry out some changes without departing from the scope of the invention, top introduction is used for illustrating, is not used for limiting.
Claims (16)
1. drill insert comprises:
The drill insert main body, it has first end, second opposed end, the first surface side, it is relative and be parallel to the second surface side and the first arete side, the second relative arete side, the described first and second arete sides form between end and face side; And
At the edge that the part of each arete side forms, described edge has front side and tail side, is formed with at least one hole in each face side of drill insert main body, and first end of described drill insert main body forms a surface, in order to when drill insert is used and a surface engagement of keeper
It is characterized in that the front side at described each edge forms spirality.
2. drill insert according to claim 1 is characterized in that, forms constant arc width between the front side at described edge and the tail side, and described front side and tail side all form spirality.
3. drill insert according to claim 1 is characterized in that, also is included near the screw slotting that radially outwards forms from described at least one hole in front side at each edge.
4. drill insert according to claim 1 is characterized in that, the part of each arete side extends to the corresponding face side of described drill insert main body from the front side at described edge at least.
5. drill insert according to claim 1 is characterized in that, described second end comprises at least two cutting edges, laterally forms mutually.
6. drill insert according to claim 5 is characterized in that, at least two cutting edges are crooked.
7. drill insert according to claim 5 is characterized in that, described plug-in unit also is included at least one chip breaking mechanism that each cutting edge forms.
8. drill insert according to claim 1 is characterized in that, described drill insert main body comprises sintered metallic hard material.
9. drill insert according to claim 1 is characterized in that, described drill insert main body comprises from carbide, cermet, pottery, the material of selecting in monocrystal and polycrystalline diamond and the boron nitride.
10. drill insert according to claim 1 is characterized in that, described drill insert main body comprises high-speed steel.
11. a drill insert comprises:
The drill insert main body, it has first end, opposite second end, the first surface side, it is relative and be parallel to the second surface side, the first arete side, the second relative arete side, the first and second arete sides form between end and face side;
It is characterized in that,
First end of drill insert main body is the plane, and it has at least one recess that forms at first end;
Second end comprises at least two curved cutting edges, laterally forms mutually;
Each face side in the drill insert main body forms at least one hole; With
At the edge that the part of each arete side forms, this edge has front side and tail side, wherein, the tail side at each edge forms spirality, the front side at each edge forms spirality, and screw slotting forms near the front side at each edge, and wherein screw slotting forms in the position radially outward in hole.
12. drill insert according to claim 11 is characterized in that, forms constant arc width between the front side at described edge and the tail side.
13. drill insert according to claim 11 is characterized in that, described at least two cutting edges are to curved edge.
14. drill insert according to claim 11 is characterized in that, also is included at least one chip breaking mechanism that each cutting edge forms.
15. a drill insert comprises:
The drill insert main body, it has first end, opposite second end, the first surface side, it is relative and be parallel to the second surface side, the first arete side, the second relative arete side, this first and second aretes side forms between end and face side; And
At the edge that the part of each arete side forms, the edge has front side and tail side;
It is characterized in that the tail side at each edge forms spirality, the front side at each edge forms spirality, forms constant arc width between the front side at described edge and the tail side, and at least a portion of each arete side extends to the corresponding face side of plug main body from the front side at edge.
16. a drill insert comprises:
The drill insert main body, it has first end, second opposed end, the first surface side, it is relative and be parallel to the second surface side, the first arete side, the second relative arete side, the first and second arete sides form between end and face side; One rotation; With
At the edge that the part of each arete side forms, this edge has front side and tail side;
It is characterized in that the tail side at each edge forms spirality, the front side at this edge extends to the face side of plug main body, makes the front side at edge and tail side form acute angle, and it is equal to helical angle.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US51820503P | 2003-11-07 | 2003-11-07 | |
| US60/518,205 | 2003-11-07 | ||
| US10/780,273 | 2004-02-17 |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009100047261A Division CN101518834B (en) | 2003-11-07 | 2004-11-05 | Spade drill insert having helical margins |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1874866A CN1874866A (en) | 2006-12-06 |
| CN100478107C true CN100478107C (en) | 2009-04-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009100047261A Active CN101518834B (en) | 2003-11-07 | 2004-11-05 | Spade drill insert having helical margins |
| CNB2004800326354A Active CN100478107C (en) | 2003-11-07 | 2004-11-05 | Spade drill insert having helical margins |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009100047261A Active CN101518834B (en) | 2003-11-07 | 2004-11-05 | Spade drill insert having helical margins |
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| Country | Link |
|---|---|
| CN (2) | CN101518834B (en) |
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2004
- 2004-11-05 CN CN2009100047261A patent/CN101518834B/en active Active
- 2004-11-05 CN CNB2004800326354A patent/CN100478107C/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN101518834B (en) | 2013-12-04 |
| CN1874866A (en) | 2006-12-06 |
| CN101518834A (en) | 2009-09-02 |
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