CN101790621A - Cutting tip and tool - Google Patents
Cutting tip and tool Download PDFInfo
- Publication number
- CN101790621A CN101790621A CN200880104880A CN200880104880A CN101790621A CN 101790621 A CN101790621 A CN 101790621A CN 200880104880 A CN200880104880 A CN 200880104880A CN 200880104880 A CN200880104880 A CN 200880104880A CN 101790621 A CN101790621 A CN 101790621A
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- Prior art keywords
- tip
- cutting tip
- cutting
- main body
- ridge
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- Pending
Links
- 239000000463 material Substances 0.000 claims abstract description 34
- 241000217377 Amblema plicata Species 0.000 claims description 2
- 238000005336 cracking Methods 0.000 abstract 1
- 239000003245 coal Substances 0.000 description 8
- 238000000034 method Methods 0.000 description 6
- 239000011435 rock Substances 0.000 description 6
- 230000006399 behavior Effects 0.000 description 5
- 230000008859 change Effects 0.000 description 5
- 239000000428 dust Substances 0.000 description 5
- 230000008901 benefit Effects 0.000 description 3
- 239000003818 cinder Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 229910003460 diamond Inorganic materials 0.000 description 2
- 239000010432 diamond Substances 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 239000012634 fragment Substances 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 230000003116 impacting effect Effects 0.000 description 2
- 238000007373 indentation Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- 150000004767 nitrides Chemical class 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- GJNGXPDXRVXSEH-UHFFFAOYSA-N 4-chlorobenzonitrile Chemical compound ClC1=CC=C(C#N)C=C1 GJNGXPDXRVXSEH-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 208000010123 anthracosis Diseases 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 238000005352 clarification Methods 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 238000010297 mechanical methods and process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 206010035653 pneumoconiosis Diseases 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
- UONOETXJSWQNOL-UHFFFAOYSA-N tungsten carbide Chemical compound [W+]#[C-] UONOETXJSWQNOL-UHFFFAOYSA-N 0.000 description 1
- -1 tungsten carbides Chemical class 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C35/00—Details of, or accessories for, machines for slitting or completely freeing the mineral from the seam, not provided for in groups E21C25/00 - E21C33/00, E21C37/00 or E21C39/00
- E21C35/18—Mining picks; Holders therefor
- E21C35/183—Mining picks; Holders therefor with inserts or layers of wear-resisting material
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C35/00—Details of, or accessories for, machines for slitting or completely freeing the mineral from the seam, not provided for in groups E21C25/00 - E21C33/00, E21C37/00 or E21C39/00
- E21C35/18—Mining picks; Holders therefor
- E21C35/183—Mining picks; Holders therefor with inserts or layers of wear-resisting material
- E21C35/1837—Mining picks; Holders therefor with inserts or layers of wear-resisting material characterised by the shape
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Earth Drilling (AREA)
- Processing Of Stones Or Stones Resemblance Materials (AREA)
- Percussive Tools And Related Accessories (AREA)
Abstract
A cutting tip (10) for a mechanical excavator comprises a tip body (11) having a generally pointed distal end (12), a proximal end (13) spaced from the distal end, and a wall (14) that diverges outwardly from the distal end towards the proximal end. The wall (14) is profiled to induce a non-uniform stress profile on the material impacted by the cutting tip to facilitate radial cracking in that material. In one form, the wall (14) is profiled to include a plurality of ridges (15) and intermediate regions (16), with the ridges (15) being arranged to induce a higher stress concentration in the impacted material than the intermediate regions (16).
Description
Technical field
The present invention relates generally to a kind of mechanical method for digging and device, more specifically, relates to the cutting element (being commonly called cutting pick) that uses in this type of method for digging.The present invention is used for the cable operated excavator that uses in mining industry by special exploitation, and the present invention is described at this point in this article.However, be understandable that the present invention has wider application and is not limited to this use.
Background technology
Comprise the cable operated excavator that cuts pick and in mining industry, be widely used in removing rock and coal cinder.This kind machinery comprises tunnelling machine, continuous miner and broadwall coal plough.One of the most widely used cutting pick is " point is invaded formula (point attack) " pick (also being commonly referred to as conical pick).The tip of actual job in cutting of these pick has conical geometry and by making such as hard materials such as tungsten carbides.These pick have universal especially than long application life because of it.
Though it is very universal that point is invaded formula pick, well-known because quite a large amount of coal cinder/rocks is pulverized in the indentation of conical tip at the shock point place, so these pick produce a large amount of dusts.Too much dust has especially become an important problem in the underground coal mine exploitation, this is because it has adverse effect to health, has for example become underground worker's maximum killer's black lung (pneumoconiosis).Reduce the way commonly used of excessive dust, for example so that being blown into a large amount of air, spraying and installation washs dirt device etc. at a high speed, all very expensive and only effectively local.Except dust, point is invaded formula pick by the too much energy of known consumption and produce too much noise (it can cause the hearing of the personnel of operation in the ore deposit to be badly damaged) and too much coal particle, these coal particles are more difficult, and therefore make the processing in the coal shadow factory spend more expense.
Summary of the invention
According to an aspect of the present invention, a kind of cutting tip that is used for cable operated excavator is provided, comprise the tip main body, this tip main body have roughly pointed far-end, with separated near-end of described far-end and the wall that expands outwardly towards described near-end from described far-end, the profile of described wall is designed to cause that stress distribution heterogeneous is to promote radial crack in this material on the material that impacted by described cutting tip.
Correspondingly, a kind of improved cutting tip is disclosed, and it can be applicable to a little invade formula pick (having pointed far-end).The profile of cutting tip of the present invention is designed to cause stress distribution heterogeneous especially, to promote radial crack in the material that is hit.Adopt this method, this cutting tip is different with the traditional round taper tip that causes homogeneous state of stress distribution on the material that is hit.
Traditional conical tip tends to indentation by pick at the contact point place of the material that the is hit extruding material that is hit, thereby causes that a large amount of circles break, and this behavior of breaking then produces a large amount of granules in such as friable materials such as coal cinder and rocks.On the contrary, the cutting tip of above-mentioned aspect is arranged to and causes the different behaviors of breaking according to the present invention, wherein more may cause radial crack.This then promotes the removing of fragment greatly of material, and because circular minimizing of breaking also makes dust reduce.Because this method crushing less material, thereby it further causes lower energy consumption, less noise and less pick/tip wearing and tearing.
In one form, cutting tip has the tip axis, and far-end and near-end are separated along this axis.Further, the profile of the wall of tip main body is designed to comprise a plurality of ridge and zone lines between these ridges of extending axially.Described ridge is arranged to than described zone line and causes that on the material that is hit higher stress is concentrated, and stress distribution heterogeneous is provided thus.
The profile of wall that comprises the tip main body of ridge can adopt various forms.Especially, described ridge can extend to the far-end of tip main body, perhaps can stop before far-end.And in a kind of preferred form, described ridge extends to far-end, and still, in another form, at least a portion of described ridge can stop before far-end.Each ridge can be continuous, and perhaps alternatively, some ridges or whole ridge can be formed by the common shorter length that forms a plurality of alignment that extend axially ridge.Further, each ridge can be only extends along the tip axis direction, perhaps alternatively, can be vertically and radially both direction extend to this axis, make these ridges on the wall of tip main body, form the part spiral.
In one form, at least some adjacent zone lines tilt mutually.In this layout, be arranged on the edge that described ridge between each zone lines of those zone lines that tilt mutually forms described tip main body.In another form, adjacent zone line can align, and makes ridge form the discontinuities in the plane of adjacent zone line of those alignment effectively.
In one form, zone line can be used as the cutting surface of tip.In this arrangement, at least one of zone line can be flat substantially on this regional at least a portion.But zone line can not be flat, and can have arc profile at least on the part of its length.In this arrangement, the radius of curvature that has of each ridge is substantially less than the corresponding radius of curvature of described arc zone line.The zone line that comprises arcuate section can projection, recessed, perhaps can be the more complicated shape that comprises any combination of smooth, projection or recessed portion.
In one form, the tip main body comprises at least three ridges.
In a kind of special form, the cutting tip main body has polygonal near-end.Further, in a kind of special form, ridge extends from the turning of far-end, thereby the quantity of ridge is identical with polygonal limit number.
The size of cutting tip can change according to the tip that instrument uses.In one form, described ridge typically has the radius of curvature in the scope of 0.1mm to 20mm.Further, the wall of tip main body or described ridge are spent to the helical angle of 170 degree with 30 and are expanded outwardly towards near-end.In one form, this angle makes that cutting tip forms negative anterior angle when impacting in use.The helical angle that can cause the tip main body of negative rake is the function of the angle of attack at place, place, cutting element contact material surface.But typically spending to the helical angle between 140 degree 100 to be enough to produce negative anterior angle.The advantage of negative anterior angle is that it can increase the extrusion stress that is applied to material, promotes thus to break.
In one form, far-end has the tip radius between the 0.2mm to 5mm.
Typically, cutting tip is arranged to be installed on the cutting element drill bit.In one form, connection part is set at the near-end of tip main body to allow this installation.In one form, connection part is the form of protuberance, and this protuberance is arranged in the recess that is undertaken on the correspondence in the tool bit.In a kind of replaceable layout, connection part is the form of recess, and tool bit comprises corresponding protuberance.Typically, cutting tip is installed to tool bit securely by the method for any appropriate such as welding or by mechanical fastening system.
Tip is made by hard material, for example cemented tungsten carbide.But the material that other are hard, for example diamond, polycrystalline diamond (PCD), the natural nitride of cube (CBN) and the natural nitride of polycrystal cubic body (PCBN) also can be used as tip material, and can be understood by those skilled in the art.
According to a further aspect, the present invention is devoted to a kind of cutting element, the cutting tip according to above-mentioned arbitrary form that it comprises the tip main body and is arranged on the leading end place of this tip main body.In a kind of special form, adopt to allow the mode of cutting element around the cutting axis rotation that extends through cutting tip, cutting element is arranged to and is installed in the tool holding equipment.
Advantage according to the cutting tip of above-mentioned form is that it can be installed in and before be designed to use the point with conical tip to invade on traditional excavator of formula pick.
Description of drawings
With reference to accompanying drawing various embodiments of the present invention are described easily hereinafter.Be understandable that the particularity of accompanying drawing and associated description should not be understood that to replace the previous broadly described versatility of the present invention.
In the accompanying drawings:
Fig. 1 is the schematic diagram of cutting element according to an embodiment of the invention;
Fig. 2 is the lateral view of cutting tip of the instrument of Fig. 1;
Fig. 3 is the plan view from above of the tip of Fig. 2;
Fig. 4 is the face upwarding view of the tip of Fig. 2;
Fig. 5 is the schematic diagram according to second embodiment of cutting element of the present invention;
Fig. 6 is the schematic diagram of the position of cutting element when impact material surface of Fig. 1; And
Fig. 7 be subjected to the friable material that the cutting tip of Fig. 2 impacts the behavior of breaking schematically illustrate figure.
The specific embodiment
Fig. 1 shows the cutting element 50 (also being commonly referred to as cutting pick) that is used for cable operated excavator.This cutting element 50 comprises two critical pieces, i.e. cut drill 51 and hard insert, and this hard insert also is commonly referred to as cutting tip 10 and is set at the front end 52 of cut drill 51.This cutting tip 50 is installed to the front end 52 of cut drill 51 fastenedly, so that this cutting tip can bear the strong power of impacting in use on cutting pick.Cutting tip can be brazed to cut drill, and can also comprise protuberance or recess, and this protuberance or recess are undertaken in the recess or protuberance of the complementary shape in the cut drill.Also can use other to fix or erecting device, comprise the mechanical fastening system that can get loose, these install all in the scope of the present disclosure.
In use, a plurality of pick 50 typically are installed in the corresponding pick chucking device, and this pick chucking device is installed on the rotatable drum of excavator.Pick 50 stretches out from drum, and this pick is moved on rock surface along cutting direction when drum rotates.Adopt this method, described pick (generally is called the angle of attack (attack angle)) at a certain angle impacts rock surface, and the typical orientation of cutting pick when the impactite stone material schematically is shown among Fig. 6.With reference to Fig. 6, angle of attack is spent less than 90, and typically is about 55 degree, and anterior angle (rake angle) β is the function of helical angle (pitch angle) σ and angle of attack.In the illustrated form, when the helical angle σ of cutting tip was very big, anterior angle β was negative (that is to say that anterior angle extends beyond the normal of rock surface).Although negative anterior angle is dispensable for the present invention, the anterior angle of bearing when the validity of the shear action of considering to improve pick is favourable.
Fig. 2 to Fig. 4 shows the geometry of cutting tip 10 in greater detail.Substantially, cutting tip 10 comprises tip main body 11, and tip main body 11 has the near-end 13 of pointed far-end 12 and broad.Pointed far-end 12 is positioned on the central axis C L of cutting tip, and the central axis C L of this cutting tip overlaps with the centre line C L of as shown in Figure 1 tip cutting pick in use.In one form, far-end 12 is for roughly hemispherical, and has the tip radius r 1 of 0.2mm to about the 5mm.
The synthetic anterior angle of the amount of bow influence cutting pick as shown in Figure 6 of zone line 16.In graphic form, zone line be bent into far-end provide 120 spend to 140 the degree about helical angle σ.This provides firm summit for the tip geometry.But the geometry of cutting tip can be so that helical angle σ changes than this wide ranges ground, and typically can spend between 170 degree 30 and change.Similarly, the helical angle of cutting tip can change towards near-end along zone line.In graphic form, zone line has second helical angle at the near-end near the tip main body, and this second helical angle is littler than the helical angle of far-end, thinks the minimise wear during cutting tip provides buffering and feasible thus cutting.
Although it is crooked and roughly protruding towards far-end that zone line is shown as in the illustrated embodiment with it, in alternative embodiment, these zones can curve inwardly with recessed in this orientation.Further, these recessed zone is extensible spreads all over each regional width or can only be applied to this regional part (typically being mid portion).
And described ridge can be arranged to the profile of following zone line, and in the illustrated embodiment, ridge 15 is followed the orientation of zone line 16 projectioies with it towards far-end 12 bendings.But by change the height of ridge along the length of ridge, described ridge can have different orientation with respect to zone line, and correspondingly can extend by straight line, can be protruding or recessed, and irrelevant with the structure (that is whether smooth, the projection or recessed in these zones) of zone line.Adopt this method, the geometry that provides multimachine more can optimize cutting tip, this geometry and its ability of breaking of enhancing, to have effective cutting surface relevant with good polishing machine.
In graphic form, cutting tip 10 further comprises connection part 17, and this connection part is from the near-end 13 of tip main body 11 stretch out (Fig. 2).In graphic form, connection part is the form of short and thick handle, and it is cylindrical and is arranged to the recess of the correspondence of the leading end 52 that is arranged in tool bit main body 51.Be understandable that the structure of connection part can adopt other forms as skilled in the art to understand.
When use comprised the tip geometry of ridge 15, the stress distribution on the material that is hit was heterogeneous, and more specifically, described ridge is arranged to than zone line and causes that in the material that is hit higher stress is concentrated.This higher stress is concentrated and is then promoted radial crack in this material, rather than promotes to break with the leading circle that accounts for that traditional round conical points hair is given birth to.The example of the radial crack that strengthens is shown among Fig. 7, and the tip that wherein has the tip geometry of Fig. 2 impacts on the fragile material 100, thereby causes the radial fissure 101 of qualification.Cause that the break advantage of behavior of difference has promoted the removing of big fragment of material, and owing to reduced circle and break and make the dust minimizing.Further, tip geometry as shown in Figure 2 is than traditional conical tip crushing less material, and further causes energy consumption minimizing, noise to reduce and the wearing and tearing of pick tip reduce.
Although the tip geometry shown in Fig. 1 to Fig. 4 has roughly square base, also can provide other tip geometries with aforesaid favourable behavior of breaking.For example, Fig. 5 illustrates a kind of distortion, wherein cuts pick 60 and comprises cutting tip 10, and this cutting tip has the tip geometry that comprises the pentagon base portion, forms five ridges thus, rather than four ridges among the previous embodiment.
In the description before claims and the present invention, in context because clear and definite language or necessary hint and requiring in addition, word " comprises (comprise) " or its version, for example " comprise (comprises) " or " comprising (comprising) ", used with the open implication that comprises, that is to say, be used to offer some clarification on and have described feature, exist in the various embodiments of the present invention or increase further feature but be not precluded within.
Under the situation that does not deviate from the spirit or scope of the present invention, can make various variations and/or modification to above-mentioned parts.
Claims (24)
1. cutting tip that is used for cable operated excavator, comprise the tip main body, this tip main body have roughly pointed far-end, with separated near-end of described far-end and the wall that expands outwardly towards described near-end from described far-end, the profile of described wall is designed to cause that stress distribution heterogeneous is to promote radial crack in this material on the material that impacted by described cutting tip.
2. cutting tip as claimed in claim 1, wherein said cutting tip has the tip axis, and described far-end and described near-end are separated along this axis, and, the profile of wherein said wall is designed to comprise a plurality of ridge and zone lines between described ridge of extending axially, and wherein said ridge is arranged to than described zone line and causes that on the described material that is hit higher stress is concentrated.
3. cutting tip as claimed in claim 2, wherein said ridge extend to the described far-end of described tip main body.
4. as claim 2 or 3 described cutting tips, wherein at least some adjacent zone lines tilt mutually, and are arranged on the edge that described ridge between each zone lines of those zone lines that tilt mutually forms described tip main body.
5. as each described cutting tip in the claim 2 to 4, at least one of wherein said zone line is flat substantially on this regional at least a portion.
6. as each described cutting tip in the claim 2 to 5, at least one of wherein said zone line is arc, and the radius of curvature that has separately of described ridge is substantially less than the corresponding radius of curvature of described arc zone line or each arc zone line.
7. as each described cutting tip in the claim 2 to 6, the radius of curvature that wherein said ridge has is in the scope of 0.1mm to 20mm.
8. the cutting tip described in claim 6 or 7, wherein said zone line described at least one on this regional at least a portion, be protruding.
9. as each described cutting tip in the claim 6 to 8, at least one of wherein said zone line is recessed on this regional at least a portion.
10. as each described cutting tip in the claim 2 to 9, wherein said tip main body comprises at least three ridges.
11. as each described cutting tip in the claim 2 to 10, the described near-end of wherein said tip main body is a polygon, and described ridge extends from the turning of described near-end.
12. the described cutting tip of each claim as described above, the described wall of wherein said tip main body expands outwardly towards described near-end, and has 30 degree to the helical angle between 170 degree at described far-end.
13. the described cutting tip of each claim as described above, wherein said far-end has the tip radius between the 0.2mm to 5mm.
14. the described cutting tip of each claim further comprises the tip axis as described above, described cutting tip is in use around this tip axis rotation.
15. cutting tip as claimed in claim 14, wherein said far-end are positioned on the described tip axis.
16. the described cutting tip of each claim further comprises connection part as described above, it is set at the described proximal end of described tip main body and is arranged to described cutting tip is installed in the cutting element drill bit.
17. cutting tip as claimed in claim 16, wherein said connection part are the form of protuberance, this protuberance is arranged in the recess that is undertaken on the correspondence in the described tool bit.
18. cutting tip as claimed in claim 16, wherein said connection part are the form of recess, this recess is arranged in the protuberance that is undertaken on the correspondence in the described tool bit.
19. a cutting element comprises the drill main body with leading end, and be arranged on described leading end place according to the described cutting tip of aforementioned each claim.
20. cutting element as claimed in claim 18, wherein said cutting tip is installed to described drill main body, and is formed by the material harder than described drill main body.
21. as claim 18 or 19 described cutting elements, wherein said cutting element can rotate around tool axis.
22. cutting element as claimed in claim 20, wherein said tool axis extend through the described far-end of described cutting tip.
23. described with reference to the accompanying drawings cutting tip basically as in this article.
24. described with reference to the accompanying drawings cutting element basically as in this article.
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU2007903569 | 2007-07-02 | ||
| AU2007903569A AU2007903569A0 (en) | 2007-07-02 | Cutting pick | |
| AU2007903627 | 2007-07-04 | ||
| AU2007903627A AU2007903627A0 (en) | 2007-07-04 | Cutting pick | |
| PCT/AU2008/000969 WO2009003233A1 (en) | 2007-07-02 | 2008-07-02 | Cutting tip and tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101790621A true CN101790621A (en) | 2010-07-28 |
Family
ID=40225646
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200880104880A Pending CN101790621A (en) | 2007-07-02 | 2008-07-02 | Cutting tip and tool |
Country Status (6)
| Country | Link |
|---|---|
| EP (1) | EP2167790A1 (en) |
| CN (1) | CN101790621A (en) |
| AU (1) | AU2008271918A1 (en) |
| CA (1) | CA2699539A1 (en) |
| EA (1) | EA016278B1 (en) |
| WO (1) | WO2009003233A1 (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT508231B1 (en) * | 2009-05-14 | 2011-05-15 | Sandvik Mining & Constr Oy | CUTTING DEVICE FOR A MINING MACHINE |
| AT508232B1 (en) * | 2009-05-14 | 2011-05-15 | Sandvik Mining & Constr Oy | CUTTING TOOL FOR A MINING MACHINE |
| WO2012079110A1 (en) * | 2010-12-16 | 2012-06-21 | Newsouth Innovations Pty Limited | Cutting tip and tool |
| RU2629507C1 (en) * | 2016-06-24 | 2017-08-29 | Федеральное государственное бюджетное научное учреждение "Федеральный исследовательский центр угля и углехимии Сибирского отделения Российской академии наук" (ФИЦ УУХ СО РАН) | Cutting insert of tangential rotary cutter |
| GB201804696D0 (en) | 2018-03-23 | 2018-05-09 | Element Six Uk Ltd | Rock cutting machine |
| DE102018204775A1 (en) * | 2018-03-28 | 2019-10-02 | Thyssenkrupp Ag | Excavator tooth for a bucket wheel excavator |
| USD863386S1 (en) | 2018-06-06 | 2019-10-15 | Kennametal Inc. | Ribbed cutting insert |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2404751A1 (en) * | 1973-02-06 | 1974-08-22 | Gerald A Petersen | GRAVE TOOTH WITH HOLDER |
| WO1989001561A1 (en) * | 1987-08-11 | 1989-02-23 | Kennametal Inc. | Annular shim for construction bit having multiple perforations for stress relief |
| CN2893144Y (en) * | 2006-03-13 | 2007-04-25 | 黑龙江科技学院 | Hard alloy tool bit coal cutting machine pick-shape cutting pick with taper |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4865392A (en) * | 1985-07-18 | 1989-09-12 | Gte Products Corporation | Rotatable cutting bit |
| EP0259620A1 (en) * | 1986-09-09 | 1988-03-16 | Kennametal Inc. | Cutter bit having hard tip with middle section defined by concave surface of revolution |
| US5324098A (en) * | 1992-12-17 | 1994-06-28 | Kennametal Inc. | Cutting tool having hard tip with lobes |
| US5551760A (en) * | 1993-09-02 | 1996-09-03 | The Sollami Company | Tungsten carbide insert for a cutting tool |
| EP0757157A4 (en) * | 1995-02-16 | 1999-01-07 | Tovarschestvo Sogranichennoi O | Instrument for breaking up solid material |
| US20040065484A1 (en) * | 2002-10-08 | 2004-04-08 | Mcalvain Bruce William | Diamond tip point-attack bit |
| US20070205652A1 (en) * | 2004-03-15 | 2007-09-06 | Wright Stewart J | Rotatable Cutting Tool |
-
2008
- 2008-07-02 WO PCT/AU2008/000969 patent/WO2009003233A1/en active Application Filing
- 2008-07-02 CA CA2699539A patent/CA2699539A1/en not_active Abandoned
- 2008-07-02 AU AU2008271918A patent/AU2008271918A1/en not_active Abandoned
- 2008-07-02 EP EP08757037A patent/EP2167790A1/en not_active Withdrawn
- 2008-07-02 EA EA201070081A patent/EA016278B1/en not_active IP Right Cessation
- 2008-07-02 CN CN200880104880A patent/CN101790621A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2404751A1 (en) * | 1973-02-06 | 1974-08-22 | Gerald A Petersen | GRAVE TOOTH WITH HOLDER |
| WO1989001561A1 (en) * | 1987-08-11 | 1989-02-23 | Kennametal Inc. | Annular shim for construction bit having multiple perforations for stress relief |
| CN2893144Y (en) * | 2006-03-13 | 2007-04-25 | 黑龙江科技学院 | Hard alloy tool bit coal cutting machine pick-shape cutting pick with taper |
Also Published As
| Publication number | Publication date |
|---|---|
| AU2008271918A1 (en) | 2009-01-08 |
| EA016278B1 (en) | 2012-03-30 |
| EA201070081A1 (en) | 2010-06-30 |
| EP2167790A1 (en) | 2010-03-31 |
| WO2009003233A1 (en) | 2009-01-08 |
| CA2699539A1 (en) | 2009-01-08 |
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