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CN1603077A - Method for processing crystal combination diamond and products thereof - Google Patents

Method for processing crystal combination diamond and products thereof Download PDF

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Publication number
CN1603077A
CN1603077A CN 200410091398 CN200410091398A CN1603077A CN 1603077 A CN1603077 A CN 1603077A CN 200410091398 CN200410091398 CN 200410091398 CN 200410091398 A CN200410091398 A CN 200410091398A CN 1603077 A CN1603077 A CN 1603077A
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Prior art keywords
crystal combination
diamond
nozzle
combination diamond
easy
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CN 200410091398
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CN1328027C (en
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李尚劼
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Shenzhen Haimingrun Superhard Materials Co Ltd
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Abstract

The invention relates to manufacturing method and product of the crystal combination diamond nozzle. Its features are that before the blank body is sintered, the pre-burying component is formed by the pre-burying material which is easy to manufacture, and has no interference to sinter the nozzle core. The pre-burying is set at the center of the solid assembling block composed before high pressure. Then the diamond powder added binding agent is filled to the circumference of the pre-burying in the assembling block. The crystal combination diamond nozzle blank with center hole pre-burying area is sintered by super-high temperature and pressure. The pre-burying component part is removing by piercing method. Aperture is made to reach the demand of the nozzle aperture. The method of the invention makes the manufacturing of the crystal combination diamond nozzle be easy to do, and reduce the cost. The advantages of the crystal combination diamond nozzle with outer cover manufactured by the method of invention are that its boundary dimension is easy to precisely manufacture; and it can protect the nozzle.

Description

The processing method of crystal combination diamond and product
Technical field
The product that the invention belongs to a kind of processing method of machine tools and adopt this method to make is specifically related to a kind of processing method of crystal combination diamond and the nozzle of making of this method.
Background technology
In to metal surface sandblast shot-peening process, at present widely used is aluminium oxide ceramics nozzle, carboloy nozzle or boron carbide nozzle because blasting materials hardness height, so nozzle consumption very big, need often to change nozzle.Polycrystalline diamond (or claiming diamond multicrystal) is a kind of material that is sintered under HTHP by diadust and a small amount of bond, the crystal combination diamond hardness height made from this material, anti-wear performance is good, life-span is 5-10 a times of boron carbide nozzle, be carboloy nozzle 50-200 doubly, but difficulty of processing is very big, for example on polycrystalline diamond, make a call to a diameter 5-10 millimeter, dark hole more than 20 millimeters, with the standard machinery processing method almost is impossible, and employing spark erosion machining or laser processing method, process a polycrystalline diamond base with holes and will pay very big cost, so that the extensive use of crystal combination diamond runs into the obstacle that is difficult to go beyond.87101729 patent disclosures the schemes of two kinds of processing diamond nozzles: a kind of scheme is the single-crystal diamond powder to be mixed with metal powder afterwards pass through prior powder metallurgy method sintering together, this is actually with metal and wraps up single-crystalline diamond, in case metal is in conjunction with being worn mutually, diamond particles also will come off, the high-wearing feature of diamond particles can't embody fully, and effect is relatively poor; Another scheme is to enclose a circular hole with the more piece polycrystalline diamond, the fixing metal phase of still leaning on of polycrystalline diamond joint piece, therefore the defective of first scheme still exists, and the circular hole of enclosing is actually a class circular hole, and it is discontinuous that a joint joint polycrystalline diamond joins.Though this method has been avoided the difficult problem of polycrystalline diamond processing, such nozzle product is also very undesirable.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of processing method of crystal combination diamond easy to implement and adopts this method product processed.
Solution to the problems described above is: place assembled block to sinter the crystal combination diamond base substrate into HTHP the bortz powder that has added bond, it is characterized in that: before sintered body, earlier with being easy to processing, and the unobstructive pre-buried material of lip-syncing core sintering is pressed into built-in fitting by nozzle endoporus geomery, place height to be pressed into preceding three-dimensional assembled block center built-in fitting, the described bortz powder that has added bond is filled in the space around the built-in fitting in the assembled block, sinter the crystal combination diamond base substrate in the pre-buried district of band centre bore into through superhigh-temperature and-pressure, remove the built-in fitting body portion with method of perforation processing then, and make the aperture reach the nozzle bore requirement.
The above-mentioned pre-buried material that is easy to process can be easy to mach, and/or be easy to spark machined, and/or be easy to material of Laser Processing etc., so behind the HTHP sintering, can adopt corresponding machined and/or method for punching such as spark machined and/or Laser Processing that pre-buried district is processed.
Described " lip-syncing core sintering does not have obstruction ", be meant that the present invention is when selecting pre-buried material, consider that this pre-buried material will be with diamond and bond sintering, so selected material should not influence the normal sintering of diamond and bond under HTHP, and to keep close shrinkage factor being arranged with nozzle material.For example: if pre-buried material adopted low-melting metal, then can be in temperature-rise period, when bond did not also melt, low-melting-point metal fusing earlier infiltrated in the nozzle sintering feed, and the performance behind the nozzle sintering is descended; Shrinkage factor difference is excessive during and for example as if built-in fitting and nozzle sintering, might cause the convergent-divergent and the nozzle core of built-in fitting partly to differ too big, make mouth core cracking, distortion, when therefore selecting pre-buried material, consider the above-mentioned factor that influences the polycrystalline diamond sintering quality.Usually can use with the raw material of nozzle core bond same type and make pre-buried material, suitably increase the individual components ratio, improve the workability of built-in fitting, note suitable shrinkage factor simultaneously, easier so reliable, and sintering that can the overslaugh nozzle core.
Further method of the present invention is: it is external that the contact of metal or nonmetal circumferential surface is enclosed within the crystal combination diamond that processes endoporus tightly.
Above-mentioned metal-coating can be stainless steel, common straightcarbon steel or steel alloy, copper and alloy thereof, aluminium and alloy, carbide alloy etc., nonmetal overcoat can be materials such as nylon, plastics, hard rubber, the overcoat wall thickness is usually more than 1 millimeter, can be that the interference close-fitting legally is connected, method for welding connects or powder metallurgy hot pressing inlaying process connects with the method for attachment of crystal combination diamond mouth core.
Further again scheme of the present invention is: the some crystal combination diamond chip axial vane surface contact stacks that process the same apertures endoporus are linked together, and the face contact embeds in the metal-coating tightly.
The polycrystalline diamond sheet useful binders bonding connection that above-mentioned axial vane surface contact stack links together.
The method that pre-buried district is set that the present invention adopts makes the processing of crystal combination diamond become simple, and has reduced processing cost.
The further scheme of the inventive method is with metal or nonmetal overcoat outside crystal combination diamond; be only to need to make nozzle reach accurate appearance and size requirement on the one hand, can play a very good protection to crystal combination diamond on the other hand with simple machine-tooled method.
The further method of the lamination built up nozzle that adopts of scheme again of the inventive method makes the possibility that is processed into of speciality crystal combination diamond.
Description of drawings:
Fig. 1, product embodiments of the present invention 1 disassembled form structural representation,
Fig. 2, product embodiments of the present invention 2 disassembled form structural representations
Fig. 3, product embodiments of the present invention 3 structural representations
The metal seal mouth ring of the 1-crystal combination diamond 2-metal-coating 3-band conical surface
Specific embodiments
Embodiment one
1, metal nickel powder is mixed with bortz powder, nickel content is 55%wt (when usually nickel content is greater than 40%wt, being easy to carry out spark machined), and it is that 6 millimeters, length are that 30 millimeters pole is made pre-buried rod that mixed-powder is pressed into diameter;
2, pre-buried rod being fixed on height is pressed on the preceding assembled block central axis, the peripheral diamond mixed-powder that completely contains 20% metal nickel powder of filling of pre-buried rod, through 60,000 atmospheric pressure, 1500 ℃ high pressure high temperature sintering, obtain the polycrystalline diamond base substrate with pre-buried district, the diameter in pre-buried district is less than 6 millimeters at this moment;
3, with grinder two end faces of polycrystalline diamond base substrate are polished wholely, grind processing excircles with centerless grinder, outside diameter is 14mm, long 25mm;
4, punch with the red copper electrode of the 6mm zone that central metal content is high on spark-erosion perforating machine, processing obtains the crystal combination diamond mouth core of 6mm internal diameter;
5, as Fig. 1, polycrystalline diamond mouth core 1 tight fit of passing the hole is pressed into stainless steel outer sleeve 2, will be pressed into stainless steel outer sleeve with stainless steel ring 3 tight fits of scalene cone then.With lathe stainless steel outer sleeve is machined to specified size, 20 millimeters of external diameters, 35 millimeters of length overalls.
Usually if the size of compacting built-in fitting is identical with nozzle inside diameter, behind the HTHP sintering, the diameter of built-in fitting can slightly dwindle, keep certain allowance so can be perforation, remove some polycrystalline diamond hole walls slightly, can reach the nozzle bore requirement, and guarantee that hole wall partly is the polycrystalline diamond material of high rigidity, high-wear resistance.
Carboloy nozzle, the boron carbide nozzle of this routine crystal combination diamond and same specification are compared test, with granularity 24 order green silicon carbide sand blasting treatment is carried out in the high metal surface of hardness, carboloy nozzle can use 8-10 work shift; The boron carbide nozzle can use 70-80 work shift; This routine crystal combination diamond can use 350-500 work shift.
Embodiment two
1, the metallic iron powder is mixed with silicon carbide powder, metal Ferrum content be 35%wt (generally, metal Ferrum content is easy to carry out spark machined during greater than 30%wt), again mixed-powder is pressed into 10 millimeters of diameters, high 6 millimeters pole as pre-buried rod;
2, pre-buried rod is fixed on height and is pressed into preceding assembled block center, the peripheral filling expired diamond dust, put the metallic cobalt sheet at bortz powder with above the pre-buried rod, through 60,000 atmospheric pressure, 1450 ℃ high pressure high temperature sintering, obtain the crystal combination diamond base substrate with pre-buried district, the diameter in pre-buried district is less than 10 millimeters at this moment;
3, with grinder that 5 above-mentioned crystal combination diamond base substrate grinding two end surfaces are whole, grind its cylindrical with centerless grinder, the external diameter of every mouth core is 14 millimeters, high 5 millimeters;
4, on spark-erosion perforating machine, punch, obtain the polycrystalline diamond mouth core of 10 millimeters endoporus with 10 millimeters the red copper electrode zone that central metal content is high;
5, referring to Fig. 2, five crystal combination diamond 1 chips that pass the hole are connected with the AB glue bond, graphite rod with 10 millimeters of diameters during bonding is through five chips together, with guarantee five chips centre bore alignment, the built up nozzle core tight fit that cements is pressed into brass overcoat 2, to be pressed into the brass overcoat with brass billet 3 tight fits of scalene cone again, overcoat will be machined to specified size with lathe.
Embodiment three
1, metal nickel powder, copper powder are mixed with diamond dust, for being easy to spark machined, wherein the metal powder total content should be greater than 40%wt, this example is 45%wt, with mould pole and 20 millimeters of end diameters, 7.2 millimeters of other end diameters, each one high 12 millimeters of the conical surface body that mixed-powder is pressed into 12 millimeters of diameters, 30 millimeters of length respectively is used as built-in fitting;
2, built-in fitting is placed on height and is pressed into preceding assembled block center, the diamond mixed-powder of the titanium of the peripheral silicon that is contained 12%wt, 3%wt surrounds, through 60,000 atmospheric pressure, be higher than 1500 ℃ high pressure high temperature sintering, obtain crystal combination diamond base substrate with pre-buried district;
3, with grinder that the crystal combination diamond base substrate grinding two end surfaces that obtains is whole, grind its cylindrical with centerless grinder, the external diameter of nozzle mouth core is 20 millimeters, long 35 millimeters;
4, on spark-erosion perforating machine, punch, obtain the polycrystalline diamond of 6 millimeters endoporus with 6 millimeters the red copper electrode zone that central metal content is high; The conical surface is got in the polycrystalline diamond base substrate rotation of having bored a hole with the electrode pair of band specified angle again, obtains whole crystal combination diamond.
Embodiment four
1, metal nickel powder is mixed with silicon carbide micro-powder, nickel content is 55%wt (when usually nickel content is greater than 40%wt, being easy to carry out Laser Processing), mixed-powder is pressed into diameter is 10 millimeters, highly is that 6 millimeters disk is done pre-buried;
2, on the pre-buried assembled block central axis that is fixed on before height is pressed into, the pre-buried peripheral diamond mixed-powder that completely contains 15% metal nickel powder of filling, through 60,000 atmospheric pressure, 1500 ℃ high pressure high temperature sintering, obtain the polycrystalline diamond base substrate with pre-buried district, this moment, the diameter in pre-buried district was slightly less than 10 millimeters;
3, with grinder that 10 above-mentioned crystal combination diamond base substrate grinding two end surfaces are whole, grind its cylindrical with centerless grinder, the external diameter of every mouth core is 25 millimeters, high 5 millimeters;
4, be placed on zone excision on the laser cutting machine that central metal content is high, processing obtains the crystal combination diamond mouth core of 10mm internal diameter;
5, the polycrystalline diamond mouth core tight fit that will pass the hole is pressed into stainless steel outer sleeve, will be pressed into stainless steel outer sleeve with the stainless steel ring tight fit of scalene cone then.With lathe stainless steel outer sleeve is machined to specified size, 35 millimeters of external diameters, 60 millimeters of length overalls.
This programme mainly is fit to the making of large aperture nozzle.
Embodiment five
1, obtains the sheet nozzle core by " 1 ", the identical method of " 2 " step among the embodiment four.With grinder that 5 above-mentioned crystal combination diamond base substrate grinding two end surfaces are whole, grind its cylindrical with centerless grinder, the external diameter of every mouth core is 14 millimeters, high 5 millimeters;
2, select the tubulose cutting head to be aided with the diamond abrasive zone machines excision that central metal content is high on ultrasonic drilling machine, processing obtains the crystal combination diamond mouth core of 6mm internal diameter;
3, the polycrystalline diamond mouth core tight fit that will pass the hole is pressed into cotton garment, will be pressed into cotton garment with the nylon ring tight fit of scalene cone then.With lathe cotton garment is machined to specified size, 20 millimeters of external diameters, 35 millimeters of length overalls.
According to the composite request of working (machining) efficiency and machining accuracy, but two or three kind of method in the also selector processing, spark machined, Laser Processing make up processing.
Polycrystalline diamond of the present invention can be to add catalyst metal as the growth slug type polycrystalline diamond (as embodiment two) that bond makes, and also can be to add the slug type polycrystalline diamond (as embodiment three) that the strong carbide element makes as bond.The bond adding method can be that powder is sneaked into method, also can be method of impregnation, or bortz powder coating surface method.
The inventive method is equally applicable to the processing of polycrystalline diamond product outside the nozzle.

Claims (6)

1, the processing method of crystal combination diamond, place assembled block to sinter the crystal combination diamond base substrate into the bortz powder that has added bond with HTHP, it is characterized in that: before sintered body, earlier with being easy to processing, and the unobstructive pre-buried material of lip-syncing core sintering is pressed into built-in fitting by nozzle endoporus geomery, place height to be pressed into preceding three-dimensional assembled block center built-in fitting, the described bortz powder that has added bond is filled in the space around the built-in fitting in the assembled block, sinter the crystal combination diamond base substrate in the pre-buried district of band centre bore into through superhigh-temperature and-pressure, remove the built-in fitting body portion with method of perforation processing then, and make the aperture reach the nozzle bore requirement.
2, the processing method of crystal combination diamond according to claim 1 is characterized in that: metal or the contact of nonmetal circumferential surface are enclosed within outside the crystal combination diamond core that processes endoporus tightly.
3, the processing method of crystal combination diamond according to claim 2, it is characterized in that: the some crystal combination diamond chip axial vane surface contact stacks that process the same apertures endoporus are linked together, and the face contact embeds in the described overcoat tightly.
4, according to the processing method of claim 1,2 or 3 described crystal combination diamonds, it is characterized in that: the described pre-buried material that is easy to process is to be easy to machined and/or to be easy to spark machined and/or to be easy to the material of Laser Processing.
5, crystal combination diamond is characterized in that: outside crystal combination diamond, face tight fit contiguously is with metal or nonmetal overcoat.
6, crystal combination diamond according to claim 5 is characterized in that: described crystal combination diamond is linked together by the polycrystalline diamond sheet axial vane surface contact stack in some band identical central holes and forms.
CNB2004100913980A 2004-11-25 2004-11-25 Method for processing crystal combination diamond and products thereof Active CN1328027C (en)

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Application Number Priority Date Filing Date Title
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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101579843B (en) * 2009-01-20 2012-05-30 江苏工业学院 manufacturing method of artificial polycrystalline diamond nozzle
CN104475986A (en) * 2014-10-31 2015-04-01 无锡阳工机械制造有限公司 Cutting head nozzle for laser metal cutting machine
CN106079047A (en) * 2016-08-09 2016-11-09 厦门理工学院 A kind of ceramic nozzle compression molding device
CN110756341A (en) * 2019-11-30 2020-02-07 拉思丁科技(深圳)有限公司 Diamond nozzle of ultrahigh-pressure liquid jet and manufacturing method thereof
CN113769979A (en) * 2021-09-16 2021-12-10 深圳市摆渡微电子有限公司 Nozzle for dispensing and manufacturing method thereof
WO2023039793A1 (en) * 2021-09-16 2023-03-23 深圳市摆渡微电子有限公司 Nozzle for dispensing glue and manufacturing method therefor

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19836506A1 (en) * 1998-08-12 2000-03-02 Bayer Ag Hot runner nozzle with ceramic needle
JP2002355544A (en) * 2001-05-30 2002-12-10 Tdk Corp Method of producing spherical ceramic powder, spherical ceramic powder, and composite material

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101579843B (en) * 2009-01-20 2012-05-30 江苏工业学院 manufacturing method of artificial polycrystalline diamond nozzle
CN104475986A (en) * 2014-10-31 2015-04-01 无锡阳工机械制造有限公司 Cutting head nozzle for laser metal cutting machine
CN106079047A (en) * 2016-08-09 2016-11-09 厦门理工学院 A kind of ceramic nozzle compression molding device
CN110756341A (en) * 2019-11-30 2020-02-07 拉思丁科技(深圳)有限公司 Diamond nozzle of ultrahigh-pressure liquid jet and manufacturing method thereof
CN113769979A (en) * 2021-09-16 2021-12-10 深圳市摆渡微电子有限公司 Nozzle for dispensing and manufacturing method thereof
WO2023039793A1 (en) * 2021-09-16 2023-03-23 深圳市摆渡微电子有限公司 Nozzle for dispensing glue and manufacturing method therefor

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Owner name: SHENZHEN CITY HAIMINGRUN INDUSTRY CO.,LTD.

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Address after: Guangdong city of Shenzhen province Baoan District city streets Xixiang Airlines Avenue turn Gushu Industrial Park D building, two floor

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Owner name: SHENZHEN HAIMINGRUN SUPERHARD MATERIALS CO., LTD.

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Address before: 518126 Guangdong city of Shenzhen province Baoan District city streets Xixiang Airlines Avenue turn Gushu Industrial Park D building, two floor

Patentee before: Shenzhen Haimingrun Industrial Co., Ltd.