CN1160431A - Concave cutter bit - Google Patents
Concave cutter bit Download PDFInfo
- Publication number
- CN1160431A CN1160431A CN95195657A CN95195657A CN1160431A CN 1160431 A CN1160431 A CN 1160431A CN 95195657 A CN95195657 A CN 95195657A CN 95195657 A CN95195657 A CN 95195657A CN 1160431 A CN1160431 A CN 1160431A
- Authority
- CN
- China
- Prior art keywords
- cutting head
- cutting edge
- cutting
- cutter hub
- edge sword
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000005520 cutting process Methods 0.000 claims description 225
- 229910045601 alloy Inorganic materials 0.000 claims description 16
- 239000000956 alloy Substances 0.000 claims description 16
- 238000005476 soldering Methods 0.000 claims description 16
- 229910000831 Steel Inorganic materials 0.000 claims description 12
- 239000010959 steel Substances 0.000 claims description 12
- 229910000679 solder Inorganic materials 0.000 claims description 7
- 238000005219 brazing Methods 0.000 claims description 6
- UONOETXJSWQNOL-UHFFFAOYSA-N tungsten carbide Chemical compound [W+]#[C-] UONOETXJSWQNOL-UHFFFAOYSA-N 0.000 claims description 6
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 4
- 239000011159 matrix material Substances 0.000 claims description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 2
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 2
- 229910017052 cobalt Inorganic materials 0.000 claims description 2
- 239000010941 cobalt Substances 0.000 claims description 2
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims description 2
- 229910052802 copper Inorganic materials 0.000 claims description 2
- 239000010949 copper Substances 0.000 claims description 2
- 229910052759 nickel Inorganic materials 0.000 claims description 2
- 229910052709 silver Inorganic materials 0.000 claims description 2
- 239000004332 silver Substances 0.000 claims description 2
- 229910052725 zinc Inorganic materials 0.000 claims description 2
- 239000011701 zinc Substances 0.000 claims description 2
- 239000000945 filler Substances 0.000 claims 2
- 229910052751 metal Inorganic materials 0.000 claims 2
- 239000002184 metal Substances 0.000 claims 2
- 230000003116 impacting effect Effects 0.000 claims 1
- 230000015572 biosynthetic process Effects 0.000 abstract 1
- 238000009412 basement excavation Methods 0.000 description 6
- 239000000463 material Substances 0.000 description 3
- 238000005065 mining Methods 0.000 description 3
- 238000001816 cooling Methods 0.000 description 2
- PSFDQSOCUJVVGF-UHFFFAOYSA-N harman Chemical compound C12=CC=CC=C2NC2=C1C=CN=C2C PSFDQSOCUJVVGF-UHFFFAOYSA-N 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000017105 transposition Effects 0.000 description 2
- 229910000521 B alloy Inorganic materials 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 238000007634 remodeling Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 210000001138 tear Anatomy 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B10/00—Drill bits
- E21B10/46—Drill bits characterised by wear resisting parts, e.g. diamond inserts
- E21B10/50—Drill bits characterised by wear resisting parts, e.g. diamond inserts the bit being of roller type
Landscapes
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Fluid Mechanics (AREA)
- Environmental & Geological Engineering (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
- Disintegrating Or Milling (AREA)
- Handling Of Sheets (AREA)
- Crushing And Pulverization Processes (AREA)
- Processing Of Stones Or Stones Resemblance Materials (AREA)
- Cutting Tools, Boring Holders, And Turrets (AREA)
Abstract
A concave cutter bit which has a bit body that contains a concavity in the axially forward end thereof. A plurality of cutter inserts are brazed to the bit body at the periphery of the open end of the concavity. The cutter inserts are spaced apart in such a fashion so that a gap exists between adjacent cutter inserts that is of sufficient size to prevent the formation of a continuous braze joint between any adjacent cutter inserts.
Description
Background of the present invention
The present invention relates to be used for the cutting head of excavation equipment, particularly be used for the rotatable concave cutter bit of upright groove coalcutter, continuous mining machine, trenching machine, road breaker, auger and sawing machine and so on excavation equipment.
Some existing cutting head that is used for excavation equipment uses an integral cutting part of its front end.At this moment, just this integral cutting part as impact, the cutting of cutting head or pulverize effective cutting member of soil layer and so on.The escapement of cutting head front end is released its path to the material under pulverizing or cutting.
The another kind of cutting head that is used for excavation equipment is a concave cutter bit.Typical concave cutter bit has a diameter expansion section, and the front end of this enlarged-diameter portion has a dimple.One cutting member of being made by carbide alloy and so on stiff materials is looped around on the periphery of dimple and is rounded or annular.People's such as Morrell U.S. Patent No. 5,078,219 has illustrated an example of concave cutter bit.The U.S. Patent No. 5,333,938 of the visible Gale of another example of this class cutting head.
This cutting head can be made whole annular shown in people's such as Morrell patent.In general, this cutting member is made with cobalt-cemented tungsten carbide, and the cutting head cutter hub is made of a steel.Cutting member is brazed on the steel cutting head cutter hub, thereby between the surface of the bottom surface of hard alloy cutting part and cutting head cutter hub a soldered fitting is arranged at least.
The coefficient of thermal expansion of the carbide alloy of cobalt-cemented tungsten carbide and so on is about the 1/2-1/3 of steel.Because this difference of thermal expansion, the contraction speed after steel cutting head cutter hub and the soldering of hard alloy cutting part during cooling is different, thereby causes the crack and/or cause soldering stress at the soldered fitting place in soldered fitting.
Crack in the soldered fitting can make cutting head can't pass quality inspection and become waste product.Crack or soldering stress can make the working life of concave cutter bit shorten.Obviously do not wish to take place both of these case.
Cutting member also can be made the segmental arc of the adjacent and coiled of many head and the tail one circle.But it is found that, use many arcs cutting edge swords to may not be certain minimizing with using compare crack and soldering stress of the cutting head with integral ring-shaped cutting member.Comprise in those cutting heads of many segmental arcs at cutting member,, lean on very closely though have slightly between the adjacent face of all adjacent cutting members at interval.This spacing distance in the past is about 0.020 inch.
When carrying out soldering, brazing alloy flows between the opposing end surface of adjacent cutting member segmental arc and they is joined together.Between each hard alloy cutting part segmental arc and the steel cutting head cutter hub brazing alloy is arranged also.
When after soldering, beginning to cool down, the same curing of soldered fitting between the soldered fitting between the opposing end surface of adjacent cutting member segmental arc and cutting member segmental arc and the cutting head cutter hub.But this moment, steel cutting head cutter hub and cutting member segmental arc still must cool to room temperature.
When cutting head and cutting member segmental arc continue cooling, when shrinking, because steel cutting head cutter hub and each cutting member segmental arc join together, therefore the same with the integral cutting part, the difference of the shrinkage factor between steel cutting head cutter hub and the cutting member segmental arc causes soldering stress or crack.
Obviously can find out, because soldered fitting joins together the opposing end surface of adjacent segmental arc, therefore no matter have the concave cutter bit of many segmental arc cutting members or have the concave cutter bit of integral ring-shaped cutting member, all fail to solve soldering stress and soldered fitting crack problem.
Therefore need provide a kind of improved concave cutter bit that does not have or reduce soldering stress and brazing crack at least.Thereby this concave cutter bit more can and be improved its reliable application life by quality inspection.
The present invention's general introduction
An object of the present invention is to provide a kind of improved cutting head.
Another object of the present invention provides a kind of improved concave cutter bit that is used for excavation equipment.
Another purpose of the present invention provides a kind of improved concave cutter bit that is used for upright groove coalcutter, continuous mining machine, trenching machine, road breaker, auger and sawing machine and so on excavation equipment, and wherein, the soldering stress of cutting head reduces or disappears.
In one embodiment, the present invention is a rotatable cutting head, comprises that one has the cutting head cutter hub of relative front and back end and an opening dimple of front end thereof.The soldering of many cuttings edge swords is arranged on the cutting head cutter hub on the periphery of the openend of dimple.Spacing between the adjacent cutting edge sword enough prevents from greatly to form continuous soldered fitting between adjacent cutting edge sword.
In another embodiment, the present invention is one cutting head-cutter holder assembly, comprises knife rest that a hole is wherein arranged and the cutting head with a cutting cutter head body.This cutting head cutter hub comprises relative axial front and back end, wherein, a dimple is arranged in the front end of cutting head cutter hub, and this dimple has an openend and around the periphery of this opening.The hole engagement of one holder and knife rest is arranged on this cutting head cutter hub and the cutting head cutter hub is clamped on the knife rest.Be fixed on this periphery to many cutting edge sword spaced apart, the spacing between the adjacent cutting edge sword is fully big, to prevent forming continuous soldered fitting between the adjacent cutting edge sword.
In another embodiment, the present invention is the cutting head of an impact matrix, and wherein, this cutting head comprises that one has the elongated shape cutting head cutter hub of an impact end.Cutting edge sword on many peripheries that are connected to the cutting head cutter hub is arranged on the periphery of this impact end.Each cutting is inlayed sword spaced apart and is being formed a gap between the adjacent cutting edge sword in twos.
Brief description of drawings
Below for constituting the brief description of drawings of a present patent application part:
Fig. 1 is the lateral view of an embodiment of concave cutter bit of the present invention, and the cutting head cutter hub is contained on the knife rest, and knife rest illustrates with broken section, so that being connected between cutting head cutter hub and the knife rest is shown;
Fig. 2 is the end-view of cutting head cutter hub shown in Figure 1;
Fig. 3 is the lateral view of Fig. 1 embodiment of not shown holding ring, and the part of cutting head cutter hub illustrates with sectional view, so that being connected between cutting edge sword and the cutting head cutter hub is shown;
Fig. 3 A is the partial enlarged drawing of cutting head cutter hub, and a part wherein illustrates with sectional drawing, so that the soldered fitting between cutting edge sword and the cutting head cutter hub is shown;
Fig. 4 cuts the stereogram of edge sword for Fig. 1; And
Fig. 5 is the stereogram that is used for the remodeling cutting edge sword of the such concave cutter bit cutter hub of Fig. 1.
Detailed description to embodiment
Fig. 1-4 illustrates an embodiment 10 of concave cutter bit of the present invention.Concave cutter bit 10 comprises three major parts, i.e. a cutting member 12, a cutting cutter head body 14 and a holding ring 16.
As shown in Figure 1, whole cutting head cutter hub 14 is a symmetry with the axis A-A of longitudinal center.Cutting head cutter hub 14 has an axial forward end 18 and an axial rearward end 20.Can find out obviously that from following explanation the front end of cutting head 10 impacts matrix and cuts and pulverize matrix.Therefore front end 18 can be regarded the impact end of cutting head 10 as.There is a cylinder shape knife rod that fuses with it 22 at 20 places, rear end of cutting head cutter hub 14.There is a conical butt head 24 that fuses with it at front end 18 places of cutting head cutter hub.
Have one on the cylinder shape knife rod 22 for holding ring 16 covers annular groove 26 thereon.Accompanying drawing shows the preferred holding ring 16 that is called the recessed clamp ring of circle.People's such as people's such as the visible Engle of this class holding ring U.S. Patent No. 3,519,309 and Oakes U.S. Patent No. 3,752,515.
But should see that the present invention also can use other clamp structures.For example the present invention can use so-called long holder, and it comprises that one is embedded in a compressible elongated shape column of cutting head cutter hub rear end.The U.S. Patent No. 4 that is entitled as " mining/building cutter head " that can be used for the visible Greenfield of long holder of an impingement cutter with cutter hub made from the MN-B alloy steel, 886,710 and people's such as Stiffler the U.S. Patent No. that is entitled as " cutting head and blade " 4,911,504.
During use, the knife bar of cutting head is inserted in the hole of knife rest 28 and so on and the protruding pearl 30 of the projection radially outward of preferred holding ring 16 is alignd with annular groove 32 in knife rest 28 circular holes.Concave cutter bit 10 can freely rotate relative to knife rest 28.
Though this embodiment illustrates a cutting head 10 that can rotate relative to knife rest 28, this should not regard the present invention as and be only limited to rotatable cutting head.The applicant expects that the present invention not only comprises rotatable cutting head, also cannot not comprise rotatablely the i.e. relative cutting head of its blade holder turns not of cutting head.About rotatable cutting head, this cutting head is indexable, in other words, when a cutting member weares and teares, can insert to relative this knife rest of cutting head the another location and use a unworn cutting member to cut.
Cutting head cutter hub 14 preferably has a dimple 38 at its axial forward end 18 places.A right cone is preferably defined on the surface of dimple 38.Other geometries beyond the right cone also within the scope of the present invention.The opening of dimple 38 is preferably rounded and originate in radially position inwards of cutting head cutter hub 14 front ends 18 peripheries 40 1.
The periphery of cutting head cutter hub 14 at the periphery place of dimple 38 openings preferably has a cannelure 42.Groove 42 is around the periphery of the opening of dimple 38.Groove 42 comprises an athwartship plane 44 and a longitudinal surface 46, and they intersect domatic type groove.Athwartship plane 44 is vertical with the longitudinal axis A-A of concave cutter bit 10.Longitudinal surface 46 is parallel with the longitudinal axis A-A of concave cutter bit 10.
Though domatic type groove is the optimal way that connects cutting member 12 and cutting head cutter hub 14, this use that should not regard as groove of the present invention limits to some extent.The applicant expects, cutting member 12 is that each arc cutting member can be fixed on the plane around the dimple opening with soldering or other methods of attachment.Each arc cutting member 12 also can be inserted in around in the hole on the periphery of dimple opening.
Conical butt head 24 preferably has a cylindrical shoulder 47 to prevent in the hole of cutting head 10 undue insertion knife rests.The hole mouth 49 of the fi-ustoconical surface at this shoulder rear and knife rest is corresponding and be engaged with at work.
The present invention is not limited to shown in the accompanying drawing, the specific cutting head cutter hub of above explanation.This cutting head cutter hub can be made other geometries, and for example, the cross section of the knife bar of cutting head can be square or non-cylindrical and being inserted in un-rotatably in the respective aperture of square or non-cylindrical.
Perhaps, the knife bar of cutting head and the hole of knife rest can be cylindrical, but cutting head still is contained in the knife rest in the mode that can replace, do not turn.An example of this structure is to revise the rear portion of the rear portion of knife bar of cutting head and knife rest and the United States Patent (USP) N0.5 that is entitled as " the ditching toolbox with two grades of transposition abilities " that uses people such as Beach, 007,685, also promptly a profile of tooth transposition ring that is contained in un-rotatably on the knife bar is engaged in the groove at knife rest rear portion.
In the accompanying drawing illustrated embodiment, cutting member 12 preferably includes 7 cutting edge swords that separate all using label 50 to represent.Cutting edge sword 50 is preferably curved, and its central angle " α " preferably is about 44 ° 30 '.Cutting edge sword 50 preferably has the flat bottom surface 54 of a flat end face 52,, the lateral surface 56 of an arc, the medial surface 58 and the two flat opposing end surfaces 60,62 of an arc.The adjacent in twos surface of cutting edge sword intersects the angle of point.The overall size of medial surface 58 is preferably less than lateral surface 56, thereby end face 52, bottom surface 54 and both ends of the surface 60,62 tilt inwardly towards medial surface 58.
In this embodiment, the end faces 60,62 that are scattered in all cutting edge swords 50 of each the cutting edge sword 50 on the cutting head 10 do not contact with the end face of adjacent cutting edge sword.The spacing in this gap 64 makes and can not form continuous soldered fitting between the opposite end of adjacent cutting edge sword 50 connects.
In the reality, the applicant finds that the gap that is about 3/16 inch can prevent to form between adjacent two cutting members 50 soldered fitting satisfactorily.But this should not regard scope of the present invention as the gap between the cutting edge sword that is looped around on the preceding end periphery of cutting head is limited to any specific size.The principal character in this gap should be enough wide, thereby before the soldered fitting between steel cutting head cutter hub and the cutting edge sword solidifies, can not form and solidify continuous soldered fitting between cutting edge sword.
Can see that from Fig. 3 A a soldered fitting 68 is arranged between the longitudinal surface 46 of inner surface 58 and groove 42.Between the bottom surface 54 of each cutting edge sword 50 and the athwartship plane 44 of this groove a soldered fitting 70 is arranged.Though the adjacent face of adjacent cutting edge sword has some scolders, this is not to form a continuous soldered fitting, does not have a kind of like this soldered fitting between the opposing end surface of adjacent cutting edge sword.
Gap 64 between the cutting edge sword 50 prevents to form soldered fitting between adjacent cutting edge sword.As previously mentioned, this class soldered fitting makes cutting edge sword 50 separately join together and the same soldering stress and the brazing crack of producing with integral ring-shaped cutting member.Gap 64 has also absorbed the differing from of coefficient of thermal expansion between steel and the carbide alloy and has reduced or eliminate soldering stress and crack in the soldered fitting.The reducing or eliminate the globality that has improved cutting head of soldering stress and crack.
Fig. 5 illustrates another kind of cutting edge sword 80.It is identical that total curved of cutting edge sword 80, its central angle and cutting are inlayed sword 50.Cutting edge sword 80 preferably has the flat bottom surface 84 of a flat end face 82,, the lateral surface 86 of an arc, the medial surface 88 and the two flat opposing end surfaces 90,92 of an arc.The adjacent in twos surperficial intersection of cutting edge sword 80 is preferably made fillet.
Cutting edge sword 80 and cutting are inlayed in the same groove 42 that is placed on cutting head 10 of sword 50.Spacing between each cutting edge sword 80 is identical with cutting edge sword 50.
Though can use other hard materials, the composition that is used to cut the carbide alloy of edge sword 50 and 80 is preferably the bulky grain tungsten carbide of about 90.5 percentage by weights and the cobalt of 9.5 percentage by weights.
Though can use other solder alloys, the solder alloy that is used for cutting head 10 is preferably the money base solder alloy of following composition: the nickel of the copper of the silver of about 50 percentage by weights, about 20 percentage by weights, the zinc of about 28 percentage by weights and about 2 percentage by weights.The solidus line temperature of preferred solder alloy is about 1220 ℃, and liquidus temperature is about 1305 ℃.The specification BAg-4 A-50N of the visible AWS of this solder alloy (A5.8).Handy﹠amp; This preferred solder alloy is sold with trade mark Braze by Harman company.
Mentioned all patents and the file of present patent application all is incorporated among the application by reference.
Those skilled in the art obviously can find out other embodiment of the present invention from top disclosed manual of the present invention or implementing.It only is exemplary that above-mentioned manual and embodiment should regard as, and true scope of the present invention and spirit are illustrated by the appended claim book.
Claims (20)
1, a kind of rotatable cutting head, it comprises:
One has the cutting head cutter hub of relative front and back end, and the front end of this cutting head cutter hub has a dimple, and this dimple has an openend;
Cutting edge sword on many peripheries that utilize the openend that soldering is fixed on dimple; And
Adjacent cutting edge sword is provided with at interval, so that gap therebetween is enough big, to prevent forming continuous soldered fitting between adjacent cutting edge sword.
2, by the described rotatable cutting head of claim 1, wherein, the cutting head cutter hub has a groove on the periphery of dimple openend, and this groove defines a longitudinal surface and an athwartship plane, and each cutting edge sword all forms a soldered fitting with longitudinal surface and athwartship plane.
3, by the described rotatable cutting head of claim 2, wherein, each cutting edge sword has an end face, a bottom surface, a lateral surface, a medial surface and two opposite end faces, and each cutting edge sword is fixed into any two adjacent cutting edge swords in this groove end face does not all contact; And
The bottom surface of each cutting edge sword and the athwartship plane of this groove form a soldered fitting, and the medial surface of each cutting edge sword and the longitudinal surface of this groove form a soldered fitting.
4, by the described rotatable cutting head of claim 1, comprise 7 cutting edge swords, all cutting edge swords are all curved.
5, by the described rotatable cutting head of claim 4, wherein, the central angle of each cutting edge sword is about 44 degree 30 minutes.
6, by the described rotatable cutting head of claim 1, wherein, each cutting edge sword is all made with cobalt-cemented tungsten carbide, and the cutting head cutter hub is made of a steel.
7, by the described rotatable cutting head of claim 6, wherein, this cobalt-cemented tungsten carbide comprises the tungsten carbide of about 90.5 percentage by weights and the cobalt of about 9.5 percentage by weights.
8, by the described rotatable cutting head of claim 1, wherein, solder alloy comprises the zinc of the copper of the silver of about 50 percentage by weights, about 20 percentage by weights, about 28 percentage by weights and the nickel of about 2 percentage by weights.
9, by the described rotatable cutting head of claim 1, wherein, this cutting head cutter hub has a cylinder shape knife rod in its back-end, has a groove, a holding ring to be enclosed within this groove of this knife bar on this knife bar.
10, a kind of cutting head-cutter holder assembly, it comprises:
The knife rest that one hole is wherein arranged;
Have a cutting head of a cutting cutter head body, this cutting head cutter hub comprises relative axial front and back end, and a dimple is arranged in the front end of cutting head cutter hub, and this dimple has an openend, and this cutting head cutter hub has a periphery around this openend;
The hole engagement of one holder and knife rest is arranged on this cutting head cutter hub and the cutting head cutter hub is clamped on the knife rest; And
Many cutting edge swords are fixed on this periphery to their spaced apart, thereby between the adjacent in twos cutting edge sword gap are arranged all, and institute is gapped all enough big, to prevent forming continuous soldered fitting between adjacent cutting edge sword.
11, by the described cutting head-cutter holder assembly of claim 10, wherein, the cutting head cutter hub has a groove on the periphery of dimple openend, and this groove defines a longitudinal surface and an athwartship plane, and each cutting edge sword all forms a soldered fitting with longitudinal surface and athwartship plane.
12, by the described cutting head-cutter holder assembly of claim 11, wherein, each cutting edge sword has an end face, a bottom surface, a lateral surface, a medial surface and two opposite end faces, and each cutting edge sword is fixed into any two adjacent cutting edge swords in this groove end face does not all contact; And
The bottom surface of each cutting edge sword and the athwartship plane of this groove form a soldered fitting, and the medial surface of each cutting edge sword and the longitudinal surface of this groove form a soldered fitting.
13, by the described cutting head-cutter holder assembly of claim 10, wherein, cutting head is blade holder turns relatively.
14, a kind of cutting head that is used for impacting matrix, this cutting head comprises:
The elongated shape cutting head cutter hub of one impact end is arranged on it, and this impact end has a circumferential part, and many cutting edge swords are connected on this circumferential part of cutting head cutter hub, and each cutting is inlayed sword spaced apart and formed a gap between the adjacent cutting edge sword in twos.
15, by the described cutting head of claim 14, wherein, a cavity is arranged on the impact end of this cutting head cutter hub, this cavity has an openend that is defined by this circumferential part.
16, by the described cutting head of claim 15, wherein, this cavity is spill down.
17, by the described cutting head of claim 14, wherein, this circumferential part comprises an athwartship plane vertical with the longitudinal axis of cutting head cutter hub, and each cutting edge sword is connected on this athwartship plane.
18, by the described cutting head of claim 17, wherein, each cutting edge sword brazing filler metal is on this athwartship plane, and the gap between all adjacent cutting edge swords is enough greatly to prevent forming continuous soldered fitting between adjacent cutting edge sword.
19, by the described cutting head of claim 17, wherein, this circumferential part also comprises a longitudinal surface parallel with the longitudinal axis of cutting head cutter hub, and each cutting edge sword is connected on this longitudinal surface.
20, by the described cutting head of claim 19, wherein, each cutting edge sword brazing filler metal is on this longitudinal surface, and the gap between all adjacent cutting edge swords is enough big, to prevent forming continuous soldered fitting between the adjacent cutting edge sword.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US32348194A | 1994-10-14 | 1994-10-14 | |
| US08/323,481 | 1994-10-14 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1160431A true CN1160431A (en) | 1997-09-24 |
Family
ID=23259388
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN95195657A Pending CN1160431A (en) | 1994-10-14 | 1995-08-01 | Concave cutter bit |
Country Status (10)
| Country | Link |
|---|---|
| EP (1) | EP0784733A1 (en) |
| JP (1) | JPH10508666A (en) |
| CN (1) | CN1160431A (en) |
| AU (1) | AU683404B2 (en) |
| CA (1) | CA2198102A1 (en) |
| DE (1) | DE784733T1 (en) |
| ES (1) | ES2104523T1 (en) |
| RU (1) | RU2126483C1 (en) |
| WO (1) | WO1996012084A1 (en) |
| ZA (1) | ZA957237B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3392450B1 (en) * | 2017-04-18 | 2022-10-19 | Sandvik Intellectual Property AB | Cutting apparatus |
| CA3121606C (en) * | 2018-12-12 | 2024-06-04 | Master Sinkers (Pty) Ltd | Cutter head arrangement |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1188305A (en) * | 1966-08-10 | 1970-04-15 | Coal Industry Patents Ltd | Improvements in Rotary Cutter Tools for Tunnelling and like Machines |
| GB1284539A (en) * | 1968-12-07 | 1972-08-09 | Marwin Mining Tools Ltd | Mineral cutting tools |
| CS202186B1 (en) * | 1977-11-29 | 1980-12-31 | Jaroslav Vasek | Knite incl. the knife holder determined for disconnectig the materials part. rocks |
| FR2521633A1 (en) * | 1982-02-18 | 1983-08-19 | Guillet Justin | Drill bit for rock or concrete - has circular rows of hard metal cutters brazed in recesses in end of ring drill body |
| DE3403480A1 (en) * | 1984-02-01 | 1985-08-08 | Siku GmbH Metall- und Kunststoffwarenfabrik, Rickenbach | Tool |
| EP0237359A3 (en) * | 1986-03-13 | 1988-11-23 | Smith International, Inc. | Rotary drag bits |
| US4911504A (en) * | 1988-07-20 | 1990-03-27 | Kennametal Inc. | Cutter bit and tip |
| US5078219A (en) * | 1990-07-16 | 1992-01-07 | The United States Of America As Represented By The Secretary Of The Interior | Concave drag bit cutter device and method |
| GB9224627D0 (en) * | 1992-11-24 | 1993-01-13 | De Beers Ind Diamond | Drill bit |
| US5333938A (en) * | 1993-06-28 | 1994-08-02 | Caterpillar Inc. | Cutter bit |
-
1995
- 1995-08-01 CN CN95195657A patent/CN1160431A/en active Pending
- 1995-08-01 DE DE0784733T patent/DE784733T1/en active Pending
- 1995-08-01 RU RU97108288A patent/RU2126483C1/en active
- 1995-08-01 CA CA002198102A patent/CA2198102A1/en not_active Abandoned
- 1995-08-01 ES ES95928225T patent/ES2104523T1/en active Pending
- 1995-08-01 AU AU32069/95A patent/AU683404B2/en not_active Ceased
- 1995-08-01 WO PCT/US1995/009671 patent/WO1996012084A1/en not_active Application Discontinuation
- 1995-08-01 JP JP8513202A patent/JPH10508666A/en active Pending
- 1995-08-01 EP EP95928225A patent/EP0784733A1/en not_active Withdrawn
- 1995-08-29 ZA ZA957237A patent/ZA957237B/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| EP0784733A1 (en) | 1997-07-23 |
| JPH10508666A (en) | 1998-08-25 |
| AU3206995A (en) | 1996-05-06 |
| ZA957237B (en) | 1996-04-17 |
| DE784733T1 (en) | 1998-01-02 |
| AU683404B2 (en) | 1997-11-06 |
| CA2198102A1 (en) | 1996-04-25 |
| RU2126483C1 (en) | 1999-02-20 |
| ES2104523T1 (en) | 1997-10-16 |
| WO1996012084A1 (en) | 1996-04-25 |
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