CN100446912C - Technology for making diamond composite sheet drill bit body by hot press method and drill bit body - Google Patents
Technology for making diamond composite sheet drill bit body by hot press method and drill bit body Download PDFInfo
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- CN100446912C CN100446912C CNB2005100173590A CN200510017359A CN100446912C CN 100446912 C CN100446912 C CN 100446912C CN B2005100173590 A CNB2005100173590 A CN B2005100173590A CN 200510017359 A CN200510017359 A CN 200510017359A CN 100446912 C CN100446912 C CN 100446912C
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Abstract
The present invention discloses a technology for manufacturing a diamond composite sheet drill bit body with a hot pressing method, and a drill bit body. The technology comprises the following procedures: tyre body material (2) is filled into a mould (3) prepared in advance, and graphite sheets are placed in the position of reserved composite sheets; a steel basal body (1) is arranged in the mould; the mould and components are heated to a certain temperature and pressurized, and then are cooled to a certain temperature to decompress after heat insulation and pressure maintaining for some time; the mould is retrograded after cooling is continued. The technology also comprises the procedure: drill bit diameter protection material is put in the mould before the mould and the components are heated, and therefore, the diameter protection material becomes a portion of the drill bit body. The diamond composite sheet drill bit body is manufactured by the technology.
Description
(1) technical field
The invention discloses a kind of technology of making bit body, particularly make the new technology of diamond compact bit body and the bit body made from this technology.
(2) background technology
Diamond compact (being called for short PDC) drill bit is widely used in fields such as oil exploitation, geological prospecting, water conservancy and hydropower construction, road and bridge construction, mining engineering.The complex that PDC is made up of polycrystalline diamond layer and cemented carbide substrate has the toughness of high hardness, wearability and carbide alloy.The PDC drill bit is made PDC and the soldering of PDC bit body is together formed.The quality of drill quality, performance is removed outside the Pass quality with PDC self has, and also quality, performance, the precision with the PDC bit body has direct relation.
The manufacture method of PDC bit body has two big classes at present:
The first kind is a steel body formula.Promptly will become the piece steel to make the PDC bit body of required specification and geometry by machining.The weak point of this process is: 1, the guarantor of drill bit footpath poor performance; 2, machining accuracy is low; 3, the easy sealing-off of PDC; 4, bit life is low; 5, can not adapt to bad ground construction etc.
Second class is matrix-type (also claiming the pressureless impregnation manufactured).Be that bit body forms by powder metallurgy process.In the Chinese patent " a kind of monoblock type bonding matrix and manufacture method thereof " (patent No. 91100132.8) the method was done to describe.In the matrix-type manufacture method, the carcass powder material that will form bit body earlier joins in the previously prepared graphite jig, assembling is gone up steel adding scolder and is sent into heating in the sintering furnace again, sintering forms bit body, though the PDC bit body that obtains with this kind technology has solved the existing defective of steel body formula PDC bit body, himself still has weak point: 1, manufacturing cost height; 2, the process-cycle is long; 3, the mould consumption is big; 4, tyre-e/or performance (as hardness, wearability) is difficult to adjust.
The similar approach of making drill bit is also disclosed in the Chinese patent " manufacture method of diamond thin-wall drill bit " (patent No. 99111363.2) in addition; wherein said; earlier diamond dust and steel pipe matrix are placed mould; add high pressure and make blank; in the environment that reproducibility or inert protective gas are arranged, obtain after placing the sintering furnace sintering again.Form according to describing drill bit and a hot pressing of bit body,, the present invention is still had certain reference value though it is not to produce bit body.Yet one is to use high-tension apparatus in this method, the 2nd, and there is protective gas to exist and just can carries out, its preparation process condition is comparatively harsh.
(3) summary of the invention
The object of the present invention is to provide a kind of method of the PDC of manufacturing bit body and the PDC bit body made from this method.
The invention provides the technology of manufacturing diamond compact bit body as described below.Comprise the steps: carcass material packed in the mould for preparing in advance and put graphite flake reserving the composite sheet position, again steel substrate is placed in the mould, die assembly is heated to uniform temperature and exerts pressure, after insulation, pressurize a period of time, be cooled to release under the uniform temperature earlier, continue cooling and retreat mould.
The better manufacturing process of the present invention is also further to comprise the bit gauge protection material is put in the mould before to the die assembly heating, makes thus and protects the part that the footpath material becomes bit body.Described guarantor footpath material comprises the dimond synneusis material, also comprises Hardmetal materials.
Described carcass material is by framework material and binding metal powder constituent.Framework material comprises tungsten carbide (WC), cast tungsten carbide (W
2C), tungsten-cobalt alloy powder (YG) etc., several framework materials can be used alone, but also also mix together.The content of framework material in carcass material is 20-60%.The binding metal powder comprises copper, iron, manganese, nickel, cobalt, zinc, tin, lead, chromium, titanium, silver etc., and the content of these binding metal powder is 40-80%.
Die assembly described in the manufacturing process is meant that mould, carcass material, composite sheet position put graphite flake, steel substrate, guarantor footpath material.
In the manufacturing process to the die assembly heating and temperature control between 950 ℃-1200 ℃.Employed firing equipment can adopt induction heating equipment or the direct firing equipment of resistance furnace.Sensing apparatus can be selected power supplys such as high frequency, superaudio, intermediate frequency, power frequency for use.The direct firing equipment of resistance furnace is generally selected hot press for use.In the manufacturing process die assembly is applied pressure.Pressurized equipment can be selected hydraulic press or punching machine for use.Above-mentioned heating should continue 5-30 minute with the time of pressurization simultaneously.
According to specification, shape, the carcass material proportioning difference of bit body, also inequality to temperature, pressure, heat-insulation pressure keeping time that die assembly is used, generally be controlled between above-mentioned temperature, the pressure limit.
When die assembly being finished heating and pressurization and after heat-insulation pressure keeping 5-30 minute, being cooled to release below 800 ℃.
Making the diamond compact bit body technology according to described pressure sintering just can make two the bit body of the object of the invention or have and protect the directly bit body of material.
Superiority of the present invention is: thoroughly solved the deficiency that steel body formula and matrix-type gained drill bit exist, its remarkable advantage is:
The wearability of bit body, to protect the footpath property reliable, the hardness of carcass, wearability can be adjusted arbitrarily according to different needs;
2. product precision height, PDC weld strength height, bit gauge protection dependable performance, long service life;
3. production efficiency height, processing same period is short, mould consumption is few;
4. can under the bad ground condition, use etc.
(4) description of drawings
Fig. 1 is not in the mood for PDC bit body die assembly schematic diagram for the present invention.
Fig. 2 is a coring PDC bit mould assembly schematic diagram of the present invention.
Fig. 3 is eddy-current heating schematic diagram in the heating process of the present invention.
Fig. 4 directly heats schematic diagram for resistance furnace in the heating process of the present invention.
(5) specific embodiment
Compact bit system fabrication technique flow process is not in the mood in 94 millimeters hot pressing of the present invention [one of embodiment]: φ.Referring to Fig. 1 and Fig. 3, Fig. 4.Among the figure: 1 is that steel substrate, 2 is that carcass material, 3 is that graphite jig, 4 is that induction coil, 5 is that die assembly, 6 and 7 is upper and lower battery lead plate.
(1), and is up to the standards according to design drawing machining steel matrix and graphite jig.
(2) be stained with guarantor footpath material (dimond synneusis or carbide alloy) at the graphite jig ad-hoc location, and put graphite flake in reservation composite sheet position.
(3) also fully mix by tungsten carbide 25%, copper 10%, iron 2%, manganese 5%, nickel 3%, tin 25%, lead 10%, chromium 10%, cobalt 10% proportioning assembly carcass material.
(4) load weighted carcass material is packed into graphite jig, and steel substrate done to be assembled in the graphite jig after oil removing, the processing of rust removing, die assembly formed.
(5) die assembly is sent into heat, in the pressurized equipment, it is heated to 980-1050 ℃, apply 7-10 ton axial compressive force to die assembly simultaneously, and (bit diameter strengthens after the insulation, pressurize 10-15 minute, but insulation, dwell time proper extension), when being cooled to below 800 ℃, release is come out of the stove.Continue to be cooled to below 200 ℃, i.e. mould-receded.Used heating or pressurized equipment can be with reference to using Fig. 3 or shown in Figure 4.
(6) move back mould after, through cleaning, deburring, reconditioning, processing hydrophthalmia (tank), according to external diameter and screw thread in the design machining steel body portion, through check, just become qualified compact bit body again.
The present invention [embodiment two]: 94 * 74 millimeters hot pressing of φ are cored compact bit system fabrication technique flow process referring to Fig. 2 and Fig. 3, Fig. 4.Among the figure: 1 is that steel substrate, 2 is that carcass material, 3 is that graphite jig, 4 is that induction coil, 5 is that die assembly, 6 and 7 is upper and lower battery lead plate.
(1), and is up to the standards according to design drawing machined steel body and graphite jig.
(2) be stained with guarantor's footpath material (dimond synneusis or carbide alloy) and graphite heart mould at the graphite jig ad-hoc location, and put graphite flake in reservation composite sheet position.
(3) also fully mix by tungsten carbide 25%, copper 10%, iron 2%, manganese 5%, nickel 3%, tin 25%, lead 10%, chromium 10%, cobalt 10% proportioning assembly carcass material.
(4) load weighted carcass material is packed in the graphite jig, and steel substrate is done to be assembled in the graphite jig after oil removing, the processing of rust removing, form die assembly.
(5) die assembly is sent into heat, pressurized equipment, device therefor can be with reference to using among Fig. 3 or 4 any one.It is heated to 980-1050 ℃, apply 4-6 ton axial compressive force and insulation, pressurize 8-12 minute to die assembly simultaneously after (bit diameter strengthens, but insulation, dwell time proper extension), when being cooled to below 800 ℃, release is come out of the stove.Continue to be cooled to below 200 ℃, i.e. mould-receded.
(6) move back mould after, through cleaning, deburring, reconditioning, processing hydrophthalmia (tank), according to external diameter and screw thread in the design machined steel body portion, through check, just become qualified compact bit body again.
Claims (6)
1. pressure sintering is made the diamond compact bit body technology, its feature comprises the steps: carcass material packed in the mould for preparing in advance and puts graphite flake reserving the composite sheet position, again steel substrate is placed in the mould, die assembly is heated to uniform temperature and exerts pressure, after insulation, pressurize a period of time, be cooled to release under the uniform temperature, continue cooling and retreat mould;
Before to the die assembly heating, also further comprise the bit gauge protection material is put in the mould, make thus and protect the part that the footpath material becomes bit body;
Described die assembly is meant that mould, carcass material, composite sheet position put graphite flake, steel substrate, guarantor footpath material.
2. pressure sintering according to claim 1 is made the diamond compact bit body technology, it is characterized in that described guarantor footpath material comprises the dimond synneusis material or comprises Hardmetal materials.
3. make the bit body that the diamond compact bit body technology is made according to the described pressure sintering of claim 1.
4. pressure sintering according to claim 1 is made the diamond compact bit body technology, it is characterized in that described carcass material is framework material and binding metal powder.
5. pressure sintering according to claim 1 and 2 is made the diamond compact bit body technology, it is characterized in that die assembly placed between 950 ℃ of-1200 ℃ of temperature heating.
6. pressure sintering according to claim 1 and 2 is made the diamond compact bit body technology, it is characterized in that die assembly is cooled to release below 800 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100173590A CN100446912C (en) | 2005-02-04 | 2005-02-04 | Technology for making diamond composite sheet drill bit body by hot press method and drill bit body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100173590A CN100446912C (en) | 2005-02-04 | 2005-02-04 | Technology for making diamond composite sheet drill bit body by hot press method and drill bit body |
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| Publication Number | Publication Date |
|---|---|
| CN1651182A CN1651182A (en) | 2005-08-10 |
| CN100446912C true CN100446912C (en) | 2008-12-31 |
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| CNB2005100173590A Expired - Fee Related CN100446912C (en) | 2005-02-04 | 2005-02-04 | Technology for making diamond composite sheet drill bit body by hot press method and drill bit body |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103924930B (en) * | 2014-04-18 | 2017-01-04 | 江汉石油钻头股份有限公司 | A kind of impregnated tooth being applicable to strong abrasiveness hard formation and preparation method thereof |
| CN104148631A (en) * | 2014-08-08 | 2014-11-19 | 长兴巨大勘探机械有限公司 | Sintering process of impregnated diamond bit |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3757878A (en) * | 1972-08-24 | 1973-09-11 | Christensen Diamond Prod Co | Drill bits and method of producing drill bits |
| US4780274A (en) * | 1983-12-03 | 1988-10-25 | Reed Tool Company, Ltd. | Manufacture of rotary drill bits |
| CN1055771A (en) * | 1990-01-05 | 1991-10-30 | 诺顿公司 | Low melting-point coper-manganese-zinc alloy as infiltration binder in the matrix rock drill bit |
| CN1243053A (en) * | 1999-08-12 | 2000-02-02 | 冶金工业部钢铁研究总院 | Method for mfg. of diamond thin-wall drill bit |
| CN2521373Y (en) * | 2001-12-21 | 2002-11-20 | 长沙矿冶研究院 | Impregnated diamond core bit matrix structure |
-
2005
- 2005-02-04 CN CNB2005100173590A patent/CN100446912C/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3757878A (en) * | 1972-08-24 | 1973-09-11 | Christensen Diamond Prod Co | Drill bits and method of producing drill bits |
| US4780274A (en) * | 1983-12-03 | 1988-10-25 | Reed Tool Company, Ltd. | Manufacture of rotary drill bits |
| CN1055771A (en) * | 1990-01-05 | 1991-10-30 | 诺顿公司 | Low melting-point coper-manganese-zinc alloy as infiltration binder in the matrix rock drill bit |
| CN1243053A (en) * | 1999-08-12 | 2000-02-02 | 冶金工业部钢铁研究总院 | Method for mfg. of diamond thin-wall drill bit |
| CN2521373Y (en) * | 2001-12-21 | 2002-11-20 | 长沙矿冶研究院 | Impregnated diamond core bit matrix structure |
Non-Patent Citations (2)
| Title |
|---|
| 薄壁金刚石钻头在建筑工程中的应用. 李焰，王生福.建筑机械化，第1999.5期. 1999 |
| 薄壁金刚石钻头在建筑工程中的应用. 李焰，王生福.建筑机械化，第1999.5期. 1999 * |
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| CN1651182A (en) | 2005-08-10 |
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Granted publication date: 20081231 Termination date: 20160204 |