CN104963684A - Helmet-shaped polycrystalline diamond cutting tooth - Google Patents
Helmet-shaped polycrystalline diamond cutting tooth Download PDFInfo
- Publication number
- CN104963684A CN104963684A CN201510454152.3A CN201510454152A CN104963684A CN 104963684 A CN104963684 A CN 104963684A CN 201510454152 A CN201510454152 A CN 201510454152A CN 104963684 A CN104963684 A CN 104963684A
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- Prior art keywords
- polycrystalline diamond
- matrix
- layers
- cutting tooth
- steel helmet
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- 239000010432 diamond Substances 0.000 title claims abstract description 111
- 229910003460 diamond Inorganic materials 0.000 title claims abstract description 109
- 239000000956 alloy Substances 0.000 claims abstract description 41
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 41
- 229910000831 Steel Inorganic materials 0.000 claims description 40
- 239000011159 matrix material Substances 0.000 claims description 40
- 239000010959 steel Substances 0.000 claims description 40
- 210000001015 abdomen Anatomy 0.000 claims description 25
- 239000000758 substrate Substances 0.000 claims description 21
- 239000011435 rock Substances 0.000 abstract description 20
- 230000001154 acute effect Effects 0.000 abstract description 3
- 238000005299 abrasion Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- 239000003245 coal Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 210000001138 tear Anatomy 0.000 description 1
Landscapes
- Helmets And Other Head Coverings (AREA)
Abstract
The invention discloses a helmet-shaped polycrystalline diamond cutting tooth. The helmet-shaped polycrystalline diamond cutting tooth is composed of a hard alloy base body and a polycrystalline diamond layer, wherein the hard alloy base body comprises a cylindrical base body bottom part, a circular-platform-shaped base body middle part and a helmet-shaped base body top part; the lower part of the circular-platform-shaped base body middle part is connected with the upper part of the cylindrical base body bottom part; the upper part of the circular-platform-shaped base body middle part is connected with the lower part of the helmet-shaped base body top part; and the polycrystalline diamond layer covers the base body top part of the hard alloy base body and the outer side surface of the base body middle part. When the cutting tooth with a helmet-shaped tooth top part is used, the middle part of a tooth tip is not firstly in contact with rocks, but a lip edge of a helmet cap is used for firstly cutting the rocks; and when the rocks are cut, a relatively sharp acute angle is not formed between the lip edge of the helmet cap and the rocks so that the cutting tooth is relatively sharp when being used for cutting the rocks.
Description
Technical field
The present invention relates to technical field of superhard material, be specifically related to a kind of steel helmet shape polycrystalline diamond cutting tooth.
Background technology
The driving exploitation of traditional coal and mineral and the driving etc. in tunnel are all adopt carbide alloy pick substantially.In order to improve the self-sharpening of carbide alloy cutting pick head, the crown structure of its carbide alloy pick mostly is conical surface body or bullet shape.In addition, the toothholder of the bit body of carbide alloy pick, is often all designed to the angle that cutting angle is 45 degree.Like this, in use, the axial line of carbide alloy pick can be allowed to be the angle of 45 degree with the rock face be cut, and carbide alloy cutting pick head can be uniformly grinded carbide alloy pick, and crown constantly comes to a point, and self-sharpening is good, comparatively sharp.Pass through said structure, although the self-sharpening of carbide alloy pick can be ensured, but still the inevitable carbide alloy caused because of the material of carbide alloy not wear-resisting and application life short wait not enough, particularly run into harder rock stratum, use a few minutes pick all weares and teares bad, therefore the use cost of carbide alloy pick is very high, and efficiency is very low.
Consider the hardness of hardness much larger than carbide alloy of polycrystalline diamond, have a lot of company all researching and developing polycrystalline diamond cutting tooth energetically at present, replace carbide alloy pick, to improve the abrasion resistance of pick.If but the crown structure of conical surface body or bullet shape is become according to former carbide alloy cutting pick head profile design, due to the toothholder angle limits by pick, not that the crown head of pick first contacts rock when rock cutting, but crown belly first contacts rock, thus more blunt to the cutting power of rock, drilling depth is slow and efficiency is low.
Summary of the invention
Technical problem to be solved by this invention is when applying polycrystalline diamond cutting tooth in the isogonal situation of toothholder of conventional rigid alloy pick, the cutting power occurred is more blunt, drilling depth is slow and inefficient deficiency, provides a kind of steel helmet shape polycrystalline diamond cutting tooth.
For solving the problem, the present invention is achieved by the following technical solutions:
Steel helmet shape polycrystalline diamond cutting tooth, is made up of hard alloy substrate and polycrystalline diamond layer; Described hard alloy substrate comprises columniform base bottom, the matrix belly of truncated cone-shaped and the matrix head of steel helmet shape; The bottom of the matrix belly of truncated cone-shaped connects with the top of columniform base bottom, and the top of the matrix belly of truncated cone-shaped connects with the bottom of the matrix head of steel helmet shape; Described polycrystalline diamond layer covers on the matrix head of hard alloy substrate and the outer surface of matrix belly.
In such scheme, the matrix head of described steel helmet shape is made up of hemispherical and annular lip; Hemispherical is in middle part, and upwardly; Annular lip is looped around domed bottom periphery and stretches out, and the inner edge of annular lip connects with hemispheric bottom margin, and the outer rim of annular lip connects with matrix belly.
In such scheme, described polycrystalline diamond layer is being parallel on hard alloy substrate upper surface direction, and the polycrystalline diamond parallel layers different by least 2 layers of hardness forms.
In such scheme, the hardness of polycrystalline diamond parallel layers increases from inside to outside gradually.
In such scheme, described polycrystalline diamond layer is being parallel to horizontal plane in a lateral direction, and the polycrystalline diamond transverse layers different by least 2 layers of hardness forms.
In such scheme, the hardness covering the polycrystalline diamond transverse layers of matrix head outer surface is higher than the hardness of polycrystalline diamond transverse layers covering matrix belly outer surface.
In such scheme, the polycrystalline diamond transverse layers covering matrix belly outer surface is further divided into the polycrystalline diamond transverse layers that at least 2 layers of hardness replace change.
Compared with prior art, the present invention has following features:
1, the front end face of steel helmet shape polycrystalline diamond cutting tooth is the steel helmet shape conical surface that polycrystalline diamond is made, this steel helmet conical surface is made up of hemispherical and annular lip, hemispherical is in middle part, and upwardly, annular lip is looped around hemispherical base bottom periphery and stretches out, the inner edge of annular lip and hemispheric base bottom side edge, the outer rim of annular lip connects with taper surface.
2, the polycrystalline diamond layer of steel helmet shape polycrystalline diamond cutting tooth adopts horizontal hierachical structure, can ensure the requirement of pick abrasion resistance, can increase substantially again shock resistance and the application life of pick.
3, the belly of this tooth crest to be the pick of the multilayer polycrystalline diamond structure of steel helmet cap shaped be not in use crown first contacts rock, but the first rock cutting in the lip limit of steel helmet cap, and when rock cutting, the lip limit of steel helmet cap and rock formation one sharper acute angle are comparatively sharp when making pick rock cutting.
Accompanying drawing explanation
Fig. 1 is a kind of structural representation of steel helmet shape polycrystalline diamond cutting tooth.
Number in the figure: 1, hard alloy substrate; 1-1, base bottom; 1-2, matrix belly; 1-3, matrix head; 2, polycrystalline diamond layer; 2-1, polycrystalline diamond parallel layers; 2-2, polycrystalline diamond transverse layers.
Detailed description of the invention
A kind of steel helmet shape polycrystalline diamond cutting tooth, as shown in Figure 1, comprises hard alloy substrate 1 and polycrystalline diamond layer 2.Described hard alloy substrate 1 comprises columniform base bottom 1-1, the matrix belly 1-2 of truncated cone-shaped and the matrix head 1-3 of steel helmet shape.The bottom of the matrix belly 1-2 of truncated cone-shaped connects with the top of columniform base bottom 1-1, and the top of the matrix belly 1-2 of truncated cone-shaped connects with the bottom of the matrix head 1-3 of steel helmet shape.Wherein the matrix head 1-3 of steel helmet shape is made up of hemispherical and annular lip; Hemispherical is in middle part, and upwardly; Annular lip is looped around domed bottom periphery and stretches out, and the inner edge of annular lip connects with hemispheric bottom margin, and the outer rim of annular lip connects with matrix belly 1-2.
Described polycrystalline diamond layer 2 covers on the matrix head 1-3 of hard alloy substrate 1 and the outer surface of matrix belly 1-2.In order to improve the performance of polycrystalline diamond layer 2, described polycrystalline diamond layer 2 is included in the polycrystalline diamond parallel layers 2-1 that is parallel on hard alloy substrate 1 upper surface direction and/or is parallel to horizontal plane in a lateral direction, and the polycrystalline diamond transverse layers 2-2 formed an angle with the cone-shaped of matrix belly 1-2.Its combination can be several as follows:
First kind of way is independent parallel layered mode.That is: described polycrystalline diamond layer 2 is only being parallel on hard alloy substrate 1 upper surface direction, and the polycrystalline diamond parallel layers 2-1 different by least 2 layers of hardness forms.And the hardness distribution mode of these polycrystalline diamonds parallel layers 2-1 can increase from inside to outside gradually, also can reduce gradually from inside to outside.
The second way is independent horizontal layered mode.That is: described polycrystalline diamond layer 2 is only being parallel to horizontal plane in a lateral direction, and the polycrystalline diamond transverse layers 2-2 different by least 2 layers of hardness forms.And the hardness distribution mode of these polycrystalline diamonds transverse layers 2-2 can reduce from top to bottom gradually, the firmly soft mode replaced also can be adopted.
The third mode is combination layered mode.That is: described polycrystalline diamond layer 2 is not only being parallel on hard alloy substrate 1 upper surface direction, and the polycrystalline diamond parallel layers 2-1 different by least 2 layers of hardness forms; And being parallel to horizontal plane in a lateral direction, each strata diamond parallel layers 2-1 is also made up of the polycrystalline diamond transverse layers 2-2 that at least 2 layers of hardness is different.
In a preferred embodiment of the invention, described polycrystalline diamond layer 2 adopts combination layered mode.Be parallel on hard alloy substrate 1 upper surface direction, polycrystalline diamond layer 2 is made up of the different internal layer polycrystalline diamond parallel layers 2-1 of hardness and outer polycrystalline diamond parallel layers 2-1, is wherein less than the hardness of the outer polycrystalline diamond parallel layers 2-1 away from hard alloy substrate 1 near the hardness of the internal layer polycrystalline diamond parallel layers 2-1 of hard alloy substrate 1.Be made up of multilayer polycrystalline diamond transverse layers 2-2 between inside and outside two-layer parallel polycrystalline diamond layer 2, the hardness wherein covering the polycrystalline diamond transverse layers 2-2 of matrix head 1-3 steel helmet hat outer surface is higher than the hardness of polycrystalline diamond transverse layers 2-2 covering matrix belly 1-2 outer surface.The polycrystalline diamond transverse layers 2-2 covering matrix head 1-3 steel helmet hat outer surface is same higher hardness, and the polycrystalline diamond transverse layers 2-2 that the polycrystalline diamond transverse layers 2-2 covering matrix belly 1-2 polycrystalline diamond transverse layers 2-2 is alternately changed by least 2 layers of hardness again forms.When sorting to each polycrystalline diamond transverse layers 2-2 from top to bottom, the polycrystalline diamond transverse layers 2-2 of its odd-level is higher than the polycrystalline diamond transverse layers 2-2 of even level.
Front end face due to this steel helmet shape polycrystalline diamond cutting tooth is the steel helmet shape conical surface that polycrystalline diamond is made, and namely ogival is steel helmet cap shaped, is a similar conical surface shape below top.Top steel helmet cap, intermediate portion is divided into sphere or the conical surface shape of a protrusion, and the border, bottom of its sphere or the conical surface is the similar steel helmet cap lip limit that a circle has one fixed width.Like this, first this polycrystalline diamond lip limit is in use cut to rock, and the acute angle sharper with rock formation one, comparatively sharp when making pick rock cutting.The top layer polycrystalline diamond layer 2 of steel helmet cap shaped is harder polycrystalline diamond layer 2, polycrystalline diamond layer 2 below steel helmet cap is the horizontal multilayer polycrystalline diamond layer 2 with the tangent line shape of inner carbide alloy conical surface α in an angle, the hardness of polycrystalline diamond layer 2 is hard soft alternate, the abrasion resistance that its steel helmet crown portion first floor polycrystalline diamond layer 2 requires requires high, its diamond ratio is corresponding wants high, hardness is just high, it is play a supporting role to first floor diamond that ensuing second layer polycrystalline diamond layer 2 requires, therefore its diamond proportion requirement is corresponding lower, hardness is partially soft, next be again the polycrystalline diamond layer 2 that the hard one deck of one deck is soft, until the bottom of the conical surface.This peak is that the pick of the multilayer polycrystalline diamond structure of steel helmet cap shaped has sharper cutting power, polycrystalline diamond layer 2 simultaneously owing to having one deck softer below at harder polycrystalline diamond layer 2 supports, effectively can resist the cutting force of rock to polycrystalline diamond surface tangential direction, prevent diamond layer entirety from comparatively early coming off, significantly improve the application life of polycrystalline diamond cutting tooth.In addition, in order to protect polycrystalline diamond transverse layers 2-2, it is lower that the outermost of described polycrystalline diamond transverse layers 2-2 is coated with one deck hardness, the polycrystalline diamond parallel layers 2-1 that impact resistance is stronger, and in order to improve the adhesion of whole polycrystalline diamond layer 2 and inner hard alloy substrate 1, one deck is increased again and hard alloy substrate 1 material is close in the innermost layer of polycrystalline diamond layer 2, and the polycrystalline diamond layer 2 of parallel and inner hard alloy surface, whole polycrystalline diamond layer 2 is made significantly to strengthen with the bond strength of inner hard alloy substrate 1 like this, significantly improve impact resistance and the application life of pick.
Claims (7)
1. steel helmet shape polycrystalline diamond cutting tooth, is made up of hard alloy substrate (1) and polycrystalline diamond layer (2); It is characterized in that: described hard alloy substrate (1) comprises columniform base bottom (1-1), the matrix belly (1-2) of truncated cone-shaped and the matrix head (1-3) of steel helmet shape; The bottom of the matrix belly (1-2) of truncated cone-shaped connects with the top of columniform base bottom (1-1), and the top of the matrix belly (1-2) of truncated cone-shaped connects with the bottom of the matrix head (1-3) of steel helmet shape; Described polycrystalline diamond layer (2) covers on the matrix head (1-3) of hard alloy substrate (1) and the outer surface of matrix belly (1-2).
2. steel helmet shape polycrystalline diamond cutting tooth according to claim 1, is characterized in that: the matrix head (1-3) of described steel helmet shape is made up of hemispherical and annular lip; Hemispherical is in middle part, and upwardly; Annular lip is looped around domed bottom periphery and stretches out, and the inner edge of annular lip connects with hemispheric bottom margin, and the outer rim of annular lip connects with matrix belly (1-2).
3. steel helmet shape polycrystalline diamond cutting tooth according to claim 1 and 2, it is characterized in that: described polycrystalline diamond layer (2) is being parallel on hard alloy substrate (1) upper surface direction, the polycrystalline diamond parallel layers (2-1) different by least 2 layers of hardness forms.
4. steel helmet shape polycrystalline diamond cutting tooth according to claim 3, is characterized in that: the hardness of polycrystalline diamond parallel layers (2-1) increases from inside to outside gradually.
5. steel helmet shape polycrystalline diamond cutting tooth according to claim 1 and 2, it is characterized in that: described polycrystalline diamond layer (2) is being parallel to horizontal plane in a lateral direction, the polycrystalline diamond transverse layers (2-2) different by least 2 layers of hardness forms.
6. steel helmet shape polycrystalline diamond cutting tooth according to claim 5, is characterized in that: the hardness covering the polycrystalline diamond transverse layers (2-2) of matrix head (1-3) outer surface is higher than the hardness of polycrystalline diamond transverse layers (2-2) covering matrix belly (1-2) outer surface.
7. steel helmet shape polycrystalline diamond cutting tooth according to claim 6, is characterized in that: the polycrystalline diamond transverse layers (2-2) covering matrix belly (1-2) outer surface is further divided into the polycrystalline diamond transverse layers (2-2) that at least 2 layers of hardness replace change.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510454152.3A CN104963684A (en) | 2015-07-29 | 2015-07-29 | Helmet-shaped polycrystalline diamond cutting tooth |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510454152.3A CN104963684A (en) | 2015-07-29 | 2015-07-29 | Helmet-shaped polycrystalline diamond cutting tooth |
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| Publication Number | Publication Date |
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| CN104963684A true CN104963684A (en) | 2015-10-07 |
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| CN201510454152.3A Pending CN104963684A (en) | 2015-07-29 | 2015-07-29 | Helmet-shaped polycrystalline diamond cutting tooth |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117803389A (en) * | 2024-01-15 | 2024-04-02 | 欧特威(江苏)机械科技有限公司 | Tunneling cutting pick and processing device thereof |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1314042A1 (en) * | 1985-12-30 | 1987-05-30 | Институт горного дела им.А.А.Скочинского | Cutting bit for mining machines |
| US20090273224A1 (en) * | 2008-04-30 | 2009-11-05 | Hall David R | Layered polycrystalline diamond |
| CN201507245U (en) * | 2009-12-10 | 2010-06-16 | 桂林星钻超硬材料有限公司 | Composite impact-resistant diamond tooth |
| CN103331442A (en) * | 2013-07-16 | 2013-10-02 | 中南钻石股份有限公司 | Nanometer binding agent, diamond-containing composite cutting tooth made from nanometer binding agent and manufacturing method of diamond-containing composite cutting tooth |
| CN103827436A (en) * | 2011-05-10 | 2014-05-28 | 第六元素研磨剂股份有限公司 | Polycrystalline diamond structure |
| CN204212777U (en) * | 2014-04-14 | 2015-03-18 | 黄河科技学院 | Reinforced Spiral digging machine pick |
| CN204827450U (en) * | 2015-07-29 | 2015-12-02 | 桂林星钻超硬材料有限公司 | Steel helmet shape polycrystalline diamond pick |
-
2015
- 2015-07-29 CN CN201510454152.3A patent/CN104963684A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1314042A1 (en) * | 1985-12-30 | 1987-05-30 | Институт горного дела им.А.А.Скочинского | Cutting bit for mining machines |
| US20090273224A1 (en) * | 2008-04-30 | 2009-11-05 | Hall David R | Layered polycrystalline diamond |
| CN201507245U (en) * | 2009-12-10 | 2010-06-16 | 桂林星钻超硬材料有限公司 | Composite impact-resistant diamond tooth |
| CN103827436A (en) * | 2011-05-10 | 2014-05-28 | 第六元素研磨剂股份有限公司 | Polycrystalline diamond structure |
| CN103331442A (en) * | 2013-07-16 | 2013-10-02 | 中南钻石股份有限公司 | Nanometer binding agent, diamond-containing composite cutting tooth made from nanometer binding agent and manufacturing method of diamond-containing composite cutting tooth |
| CN204212777U (en) * | 2014-04-14 | 2015-03-18 | 黄河科技学院 | Reinforced Spiral digging machine pick |
| CN204827450U (en) * | 2015-07-29 | 2015-12-02 | 桂林星钻超硬材料有限公司 | Steel helmet shape polycrystalline diamond pick |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117803389A (en) * | 2024-01-15 | 2024-04-02 | 欧特威(江苏)机械科技有限公司 | Tunneling cutting pick and processing device thereof |
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Application publication date: 20151007 |