CN102784917A - Manufacture method for directly combining diamond grind block - Google Patents
Manufacture method for directly combining diamond grind block Download PDFInfo
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- CN102784917A CN102784917A CN2011101276513A CN201110127651A CN102784917A CN 102784917 A CN102784917 A CN 102784917A CN 2011101276513 A CN2011101276513 A CN 2011101276513A CN 201110127651 A CN201110127651 A CN 201110127651A CN 102784917 A CN102784917 A CN 102784917A
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Abstract
The invention discloses a manufacture method for directly combining a diamond grind block and belongs to the technical field of manual diamond combining. The manufacture method aims at being reasonable and overcoming the problems of large pollution, high energy consumption and complicate technology in the prior art and ensures that performance of the produced diamond grind block is not lower than the standard of the prior art. The manufacture method includes: mixing pure carbon granules, Co, Ni, Fe, Si, B and other simple substances or compounds by proportion and pressing the mixture to be compact in hot mode; assembling the mixture, and directly combining the mixture into the diamond grind block through a press special for diamond according to the preset technological conditions; and reshaping the diamond grind block and connecting the diamond grind block with a tool base body. The manufacture method has the advantages of reducing acid and alkali treatment procedures of diamond in the prior art, producing no waste acid or waste liquid, saving materials, being unnecessary for treating catalysts used in diamond single crystal production, having no secondary sintering of diamond single crystals, and being capable of keeping the strength of the diamond and prolonging service life of the grinding block.
Description
Technical field
Patent of the present invention is a kind of method of manufacturing technology with the direct diamond synthesis abrading block of graphite powder particle, belongs to the technical field of artificially synthesizing diamond.
Background technology
At present, when being used for all kinds of diamond grinding block of processing such as cuttings such as stone material, concrete, grinding, polishing in manufacturing both at home and abroad, generally adopt two-step method, that is: 1. graphite is changed into diamond, after first soda acid is handled, bort(z) is purified again, sieving and grading; 2. pure diamond particles is mixed with the proper metal powder, double sintering becomes the diamond grinding block of various shape.Through the welding or other forms of connection, process the instrument of different purposes after, use.
Can find out that from present all kinds of bibliographical informations the conventional production methods of diamond grinding block needs following steps:
The first step: 1, raw material are prepared: need contain sheet metal or metal powder and graphite flake or graphite powders such as Fe, Co, Ni.2, assembling: need above metal and graphite flake or powder adjusted material and pack in the pyrophillite piece with assisting.3, synthetic: as, to make graphite part be converted into diamond crystal with above chunk HTHP sintering in the diamond press cavity of special use.4, handle: because other impurity of pyrophillite that a large amount of metals, graphite arranged and sneak into around the diamond single crystal body; Must be through strong acid, highly basic or electrolytic treatments; Float disacidify alkali salt solution with clear water then; Again the diamond single crystal body is screened the postprocessing working procedures with the dynamics classification, to obtain epigranular, the unified pure diamond single crystal body of intensity.Second step: 1, raw material are prepared: according to the purposes of the diamond grinding block of making, select granularity, intensity can adapt to the diamond single crystal body of grinding requirement, and granularity, kind, component can satisfy the metal or alloy powder of abrading block sintering process conditional request; Both ratios can make firm the controlling diamond crystal and have higher wearability of metal.2, assembling: as outer support frame, graphite jig separates with insulating materials as heating carrier between the two with steel die; Push-down head pressurization and heating on passing through on the hot press of special use are melted the part metals powder in the abrading block, reach comparatively fine and close intensity after, the pressure release of can lowering the temperature reaches the room temperature atmospheric pressure state.3, connect: according to the connection request of diamond tool, the faying face of diamond grinding block is done mechanical cleaning handle, be connected, promptly become complete diamond tool with matrix enforcement welding or other.Can cut all kinds of granite, marble, concrete etc., grinding, processing such as polishing.Can find out that from top industrial analysis two-step method is produced diamond grinding block and had following problem:
1, waste of raw materials is serious, and all metal materials in the first step only play catalysis, can reduce the pressure condition that graphite transforms to diamond, so metal powder is all fallen by chemical reaction; And unconverted graphite powder also must be handled clean with the method for physics or chemistry.
2, serious environment pollution, the waste gas and waste liquid of a large amount of acid, alkali, salt can appear in a large amount of uses of electrolyte in the chemical treatment operation and concentrated acid, concentrated base, serious contaminated environment.
3, to the influence of diamond single crystal intensity, the process conditions during secondary hot pressing still are in graphite Thermodynamically stable district, and are in higher temperature range, can reduce the intensity of diamond single crystal body, thereby influence the service life and the effect of abrading block.
4, complex process is because operation is too much, except that being difficult to guarantee that the quality of product, the production cycle is also long.
Summary of the invention
Directly the manufacturing approach of diamond synthesis abrading block is a kind ofly under the effect of metal or its catalytic alloy, to pass through specific equipment with graphite powder particle; Under the technical matters condition that reaches diamond Thermodynamically stable district, directly synthesize diamond grinding block; Rather than first diamond synthesis monocrystal, after chemical treatments such as acid, alkali, electrolysis are purified; Through double sintering, and the diamond grinding block that obtains.The objective of the invention is to: seek a kind of rational manufacturing approach; The manufacturing process of diamond grinding block is simplified more; Overcome and pollute big, problems such as energy consumption is high, complex process in original technology, guarantee to produce the diamond grinding block that its performance is not less than original technical bid Huaihe River simultaneously.
The present invention is achieved in that at first particle size diameter is mixed (according to technological requirement can earlier to metal dust carry out vacuum or heat of reduction processing) at the mixed-powder of Co, Ni, Fe, Cr, Cu, Ti, Mn, Sn, Zn, Ag, Pb, W, Mo, Zr, C, Si, B simple substance or the compound of 0.01～0.2mm by 1: 1～10 volume ratios at pure carbon granules and the particle size diameter of 0.02～3mm.Above powder is assembled in the graphite jig that surrounds with steel die; Put into hot press then, the graphite jig pressure head is implemented compacting and sintering, finally reach 200～1500Mpa pressure and 400～1200 ℃ of temperature; After keeping 1～5 minute with this understanding; After slowly reducing to atmospheric pressure at room, remove mould, obtain the diamond grinding block of moulding.After its corner deburring, in its heating assembly jig of packing into, and be assembled in the pyrophillite piece by technology with other auxiliary material.In the diamond special hydraulic press, the intensification of boosting reaches diamond Thermodynamically stable district, after keeping 3～15 minutes, has accomplished the growth technique of direct diamond synthesis abrading block in the synthetic cavity.To this abrading block decrease temperature and pressure progressively; When reaching atmospheric pressure state, in press, take out, make its slow cool to room temperature state again; Careful pyrophillite, auxiliary material and all exterior materials of heating mould removed; According to the connection request of grinding tool, its joint face is carried out processed, can become qualified diamond grinding block.Its technology comprises: raw material are prepared, the presintering of abrading block, abrading block assembling, the equipment of selecting according to manufacturing process and controlling of production process, post processing totally five parts form.
The invention has the advantages that:
1, reduced production process, need carry out the chemical treatment of soda acid or electrolysis in the former manufacturing approach of diamond grinding block to the diamond single crystal body that synthesizes, and will pass through type selecting, classification.And direct method does not need this step.
2, reduced pollution, in adamantine electrolysis, soda acid and purification processes, can produce a large amount of acid gas and waste liquid, direct method does not need this operation, so can not produce this type pollution.
3, saved raw material, in the production of diamond single crystal, used catalyst metal all will be disposed by chemistry or physical method.And the metal material of direct method will be as the material of controlling of diamond single crystal in the abrading block, to playing crucial effects the service life of improving diamond grinding block.
4, reduced waste; In the purification of diamond single crystal body, classification operation; Have a large amount of not distortion graphite, fine grained diamond single crystal body falls as garbage disposal; And its fine grained diamond of abrading block that direct method generates can increase the wearability of module, and the grinding that undeformed graphite granule helps abrading block goes out sword, thereby can increase its service life and grinding efficiency.
5, improved the intensity of diamond single crystal body indirectly, because the sintering of diamond grinding block also is the double sintering to the diamond single crystal body; Owing to be in graphite Thermodynamically stable district; Under than higher temperature, can reduce adamantine intensity, influence its serviceability; And direct synthesis technique does not need this step, thereby can prolong the service life of abrading block.
Description of drawings
Fig. 1 diamond grinding block blank hot pressing assembling sketch map
Fig. 2 diamond grinding block direct synthesis process assembling sketch map
1 mould pressure head, 2 outer dress mould 3 insulation interlayers 4 diamond grinding block blanks 5 high-strength securing bracket 6 Conducting steel bowls 7 pyrophillite plugs 8 refractory metal sheets 9 heating plates 10 graphite plugs 11 heating assembly jigs 12 pyrophillite pieces
The practical implementation method
Combine Figure of description at present, and the technological requirement of method constructed in accordance, according to the processing step of manufacturing approach the present invention is done further description.
1, raw material are prepared; The preferred size diameter is at many kinds of metal powders of Co, Ni, Fe, Cr, Cu, Ti, Mn, Sn, Zn, Ag, Pb, W, Mo, Zr, C, Si, the B of 0.01～0.2mm and non-metal powder; Also can be the alloy or the compound of above material; From above material, select the pure material of part; With particle size diameter at the pure carbon granules of 0.02～3mm by 1～10: 1 volume ratio mixes, and forms diamond grinding block blank 4 raw materials (can carry out vacuum to metal dust earlier or heat of reduction is handled according to technological requirement).
2, diamond grinding block blank sintering preparation; Adorn in the mould 2 outside pulverous diamond grinding block blank 4 raw materials are packed into more than inciting somebody to action; (adorn outward mould 2 should according to work purposes and the matrix requirement of required connection of the diamond grinding block that will produce; Produce suitable outer dress mould 2, make diamond grinding block blank 4 can have good joint face with the matrix of diamond tool, it is firm to connect.Perhaps make diamond grinding block blank 4 have higher cutting efficiency, can change the mixed proportion and the granularity of part material in the diamond grinding block blank 4, but the assembling of layering simultaneously, each layer thickness and proportioning can be according to service condition and process adjustments).Adorn outer insulation interlayer 3, the high-strength securing brackets 5 of installing additional of mould 2 more outside, the upper and lower side of Fig. 1 is applied certain pressure and adds certain loop current.After bearing certain pressure up and down and since the effect of securing bracket 5 make outer dress mould 2 not to around expansion and damaged, guaranteed diamond grinding block blank 4 sintered compact under certain pressure and temperature condition.(require: the purpose of precompressed assembling is a compacting diamond grinding block blank 4, guarantees the standard assembling of Fig. 2, and ensureing in the synthetic cavity has higher pressure, makes the diamond crystal of production have higher conversion ratio and higher-strength).
3, diamond grinding block assembling; The diamond grinding block blank 4 that suppresses more than careful the taking-up (and mould pressure head 1, adorn assembly parts such as mould 2, insulation interlayer 3, high-strength securing bracket 5 outward; Under comparatively intact situation, can reuse), remove its burr after, in the heating assembling grinding tool 11 of packing into.With Conducting steel bowl 6, pyrophillite plug 7, refractory metal sheet 8, heating plate 9 and graphite plug 10 and heating assembly jig 11 according to technological requirement, in closely knit, the orderly pyrophillite piece 12 of packing into.(require: graphite plug 10 should keep cooperating comparatively closely with diamond grinding block blank 4 up and down, and the cooperation between pyrophillite piece 12, Conducting steel bowl 6 and the heating assembly jig 11 is simultaneously wanted closely, to reduce the sintering warpage of abrading block.The size that should note rationally arranging heating plate 9, graphite plug 10, heating assembly jig 11 simultaneously be connected cooperation, guarantee the tight and smooth of whole assembling.Heating-up temperature is controlled by loop current; So answer sectional area, thickness and the resistivity etc. of reasonable disposition heating assembly jig 11, heating plate 9, graphite plug 10, Conducting steel bowl 6 etc.; Guarantee that temperature field and pressure field in the synthetic chamber are evenly distributed; Make it stable grow quality, diamond single crystal body that granularity is moderate, thereby guarantee the instructions for use and the effect of abrading block.)
4, the direct synthesis process of diamond grinding block, with the pyrophillite piece that assembles fully, promptly Fig. 2 whole put into suitable special diamond hydraulic press working cavity; According to predetermined boost, heating curve, reach graphite after the pressure and temperature condition that diamond transforms, the graphite in the test block can partly be converted into diamond; Through the control process conditions; Like temperature, pressure and both cooperations, nucleation time, growth time, can produce the diamond crystal of different grain size, varying strength, according to required adamantine size; Stablize a period of time that (the HTHP time is long more, and diamond grit is big more; More far away from graphite Thermodynamically stable district, the intensity of diamond single crystal body is high more), stop electrical heating after, reduce pressure gradually.
5, the post processing of diamond grinding block; When reaching atmospheric pressure state; Pyrophillite piece 12 after the release is comprised that its inner various types of materials Conducting steel bowl 6, pyrophillite plug 7, heatproof sheet metal 8, heating plate 9, graphite plug 10, heating assembly jig 11 move in the heat-preserving equipment; Make them under 350～600 ℃ of temperature conditions, be incubated after 60～400 minutes, slowly reach room temperature.The material of other non-diamond abrading block blanks 4 such as the pyrophillite piece 12 that will adorn outward again, heating assembling grinding tool 11 is carefully removed, and guarantees not damage diamond grinding block blank 4, is the diamond grinding block finished product.Connect the requirement of matrix again according to follow-up diamond grinding block blank 4, with joint face machining and shaping on machining apparatus, the radian of joint face, shape and matrix will closely cooperate, and smooth, clean.Firmly be connected with suitable matrix then, then can cut, roughly grind, work such as correct grinding.
Claims (5)
1. directly the manufacturing approach of diamond synthesis abrading block is characterized in that: at first carbon granules and the particle size diameter of particle size diameter at 0.02～3mm mixed by 1: 1～10 volume ratios at the mixed-powder of Co, Ni, Fe, Cr, Cu, Ti, Mn, Sn, Zn, Ag, Pb, W, Mo, Zr, C, Si, B simple substance or the compound of 0.01～0.2mm; Hot-forming diamond grinding block blank [4] is packed in heating assembly jig [11], and and Conducting steel bowl [6], pyrophillite plug [7], refractory metal sheet [8], heating plate [9], other auxiliary material of graphite plug [10] be assembled in the pyrophillite piece [12] by technology; In the diamond special hydraulic press,, reach diamond Thermodynamically stable district condition by the technological requirement intensification of boosting; After keeping 3～15 minutes; Stop heating, progressively step-down, reach the normal pressure and temperature state, remove all exterior materials according to process conditions; According to the connection request of grinding tool matrix, its joint face is carried out processed.
2. follow the manufacturing approach according to the direct diamond synthesis abrading block described in the claim 1, it is characterized in that: the manufacturing process of diamond grinding block blank [4] is to adorn in the mould [2] outside the above all kinds of powders that mix are packed into; Use mould pressure head [1] to block, use firmly clamping of high-strength securing bracket [5] all around up and down; There is insulation interlayer [3] to separate between outer dress mould [2] and the high-strength securing bracket [5], progressively boosts and the heating of electric loop through outstanding mould pressure head [1], each other alternately; Finally reach 200～1500Mpa pressure and 400～1200 ℃ of temperature conditions; Kept 1～5 minute, and reduced to the atmospheric pressure at room state, obtain densified diamond grinding block blank [4].
3. follow manufacturing approach according to the direct diamond synthesis abrading block described in the claim 1; It is characterized in that: other auxiliary material are assembled into by technology; Participate in directly the electrically heated component except that heating assembly jig [11], Conducting steel bowl [6], pyrophillite plug [7], refractory metal sheet [8], heating plate [9], graphite plug [10], also should be able to make the resistance of assembled block bigger, reduce heating current; Reduce the caloric value in the loop; With the top hammer and circuit heater of protection synthesis press, make its package assembly should be able to make that the cavity internal pressure transmission is good, temperature gradient distribution is reasonable, the diamond growth is evenly distributed in the abrading block.
4. follow manufacturing approach according to the direct diamond synthesis abrading block described in the claim 1; It is characterized in that: boost by technological requirement. heat up,, put into special diamond hydraulic press working cavity the pyrophillite piece that assembles; The pyrophillite piece is according to size, the shape of press working chamber; Observe the general requirement of diamond fabrication, boost to 65% of maximum pressure and begin to heat when above, finally reach diamond Thermodynamically stable district and pressure greater than 5 * 10
3Mpa, temperature let graphite transform to diamond between 800～2000 ℃; Through control temperature, pressure and both cooperations, nucleation time, growth time.
5. follow manufacturing approach according to the direct diamond synthesis abrading block described in the claim 1; It is characterized in that: diamond grinding block reaches normal pressure and temperature by process conditions after synthetic the completion, it is taken out from press; Put into incubator immediately; Make abrading block under 350～600 ℃ of temperature conditions, be incubated after 60～400 minutes, slowly reach room temperature.
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| CN2011101276513A CN102784917A (en) | 2011-05-18 | 2011-05-18 | Manufacture method for directly combining diamond grind block |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105965879A (en) * | 2016-06-28 | 2016-09-28 | 郑州金海威科技实业有限公司 | Elastic abrasive block assembly line |
| CN107406334A (en) * | 2015-03-06 | 2017-11-28 | 住友电气工业株式会社 | Polycrystalline diamond, cutting element, wear resistant tools, the manufacture method of grinding tool and polycrystalline diamond |
| CN110029943A (en) * | 2019-05-05 | 2019-07-19 | 广东钜鑫新材料科技股份有限公司 | MULTILAYER COMPOSITE diamond hard alloy wear resistant parts and its manufacturing method |
| CN114199610A (en) * | 2021-12-13 | 2022-03-18 | 郑州磨料磨具磨削研究所有限公司 | Diamond strength testing device and method |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107406334A (en) * | 2015-03-06 | 2017-11-28 | 住友电气工业株式会社 | Polycrystalline diamond, cutting element, wear resistant tools, the manufacture method of grinding tool and polycrystalline diamond |
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| CN110029943A (en) * | 2019-05-05 | 2019-07-19 | 广东钜鑫新材料科技股份有限公司 | MULTILAYER COMPOSITE diamond hard alloy wear resistant parts and its manufacturing method |
| CN114199610A (en) * | 2021-12-13 | 2022-03-18 | 郑州磨料磨具磨削研究所有限公司 | Diamond strength testing device and method |
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Application publication date: 20121121 |