CN113305362B - Method for repairing sintered diamond tool for precision machining through ultrasonic waves - Google Patents
Method for repairing sintered diamond tool for precision machining through ultrasonic waves Download PDFInfo
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- CN113305362B CN113305362B CN202110659432.3A CN202110659432A CN113305362B CN 113305362 B CN113305362 B CN 113305362B CN 202110659432 A CN202110659432 A CN 202110659432A CN 113305362 B CN113305362 B CN 113305362B
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- welding
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- ultrasonic
- diamond tool
- sintered
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- 229910003460 diamond Inorganic materials 0.000 title claims abstract description 54
- 239000010432 diamond Substances 0.000 title claims abstract description 54
- 238000003754 machining Methods 0.000 title claims abstract description 26
- 238000000034 method Methods 0.000 title claims abstract description 23
- 238000003466 welding Methods 0.000 claims abstract description 54
- 239000000843 powder Substances 0.000 claims abstract description 27
- 239000002131 composite material Substances 0.000 claims abstract description 21
- 239000011159 matrix material Substances 0.000 claims abstract description 19
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 17
- 239000000956 alloy Substances 0.000 claims abstract description 17
- 239000002184 metal Substances 0.000 claims abstract description 16
- 229910052751 metal Inorganic materials 0.000 claims abstract description 16
- 238000005245 sintering Methods 0.000 claims abstract description 16
- 239000002994 raw material Substances 0.000 claims abstract description 11
- 238000007731 hot pressing Methods 0.000 claims description 15
- 229910052718 tin Inorganic materials 0.000 claims description 9
- 238000002156 mixing Methods 0.000 claims description 5
- 238000004321 preservation Methods 0.000 claims description 5
- 238000003825 pressing Methods 0.000 claims description 5
- 230000003068 static effect Effects 0.000 claims description 5
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 238000002360 preparation method Methods 0.000 claims 1
- 230000008439 repair process Effects 0.000 abstract description 9
- 230000008569 process Effects 0.000 abstract description 5
- 239000000463 material Substances 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 238000011084 recovery Methods 0.000 abstract 1
- 238000000227 grinding Methods 0.000 description 4
- 239000006061 abrasive grain Substances 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 238000005219 brazing Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000010894 electron beam technology Methods 0.000 description 2
- 238000004134 energy conservation Methods 0.000 description 2
- 230000004927 fusion Effects 0.000 description 2
- 239000004615 ingredient Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 238000005087 graphitization Methods 0.000 description 1
- 229910021421 monocrystalline silicon Inorganic materials 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 229910052594 sapphire Inorganic materials 0.000 description 1
- 239000010980 sapphire Substances 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
- B23D63/00—Dressing the tools of sawing machines or sawing devices for use in cutting any kind of material, e.g. in the manufacture of sawing tools
- B23D63/08—Sharpening the cutting edges of saw teeth
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
- B23K20/10—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating making use of vibrations, e.g. ultrasonic welding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
- B24D18/00—Manufacture of grinding tools or other grinding devices, e.g. wheels, not otherwise provided for
- B24D18/009—Tools not otherwise provided for
Abstract
The invention provides a method for repairing a sintered diamond tool for precision machining through ultrasonic waves, and belongs to the technical field of remanufacturing of superhard material tools. The repairing object is a sintered diamond tool for precision machining after being damaged, and the repairing material is a sintered diamond compact. The abrasive in the composite sheet is 200/300 mesh diamond, and the raw material of the metal matrix is 300/400 mesh Ni-based alloy powder, cu-based alloy powder or Fe-based alloy powder. And manufacturing the diamond composite sheet by a proper sintering process, and welding the diamond composite sheet to a to-be-repaired position of the to-be-repaired tool by a proper ultrasonic welding process. The sintered diamond tool for precision machining repaired by the method has good performance recovery, is simple to operate, has high repair efficiency and has wide application prospect.
Description
Technical Field
The invention belongs to the technical field of superhard material tool remanufacturing, and particularly relates to a method for repairing a sintered diamond tool for precision machining through ultrasonic waves.
Background
Since the 50 s of the 20 th century, diamond and its products have been widely used in precision machining of relatively expensive materials such as monocrystalline silicon, sapphire, and the like. The variety of diamond tools is large, and sintered diamond tools have become the main stream tools for precision machining because of the advantages of long service life, high grinding precision, stable grinding and the like.
However, as the machining progresses, the precision of the sintered diamond tool becomes worse, and the sintered diamond tool needs to be shaped continuously, but some parts, such as the edge or the outer edge of the sintered diamond tool, are obviously worn due to much larger stress than other parts, and the repair welding repair is generated only by shaping and great workload.
The repair welding repair method of the sintered diamond tool comprises brazing, cold welding, laser welding and electron beam welding, but all the methods belong to the category of fusion welding, and seriously affect the matrix structure of the diamond sintered body on the sintered diamond tool. Also, because abrasive grains used for manufacturing sintered diamond tools for precision machining are generally relatively fine, fusion welding is easy to cause graphitization heat damage to the fine abrasive grains rapidly.
The ultrasonic welding can overcome the defects, and has the advantages of energy conservation, environmental protection, high production efficiency, seamless welding, low rejection rate and the like, so that the ultrasonic welding method is used for repairing the sintered diamond tool for precision machining.
Disclosure of Invention
The invention aims to provide a method for repairing a sintered diamond tool for precision machining by ultrasonic waves. The welding method solves the problem that the repair welding methods such as brazing, cold welding, laser welding, electron beam welding and the like have serious influence on the matrix and the fine abrasive particles of the sintered body. The method has the advantages of simple operation, environmental protection, good repair quality, high repair efficiency and the like, and has good application prospect.
The technical scheme adopted by the invention is that the method for repairing the sintered diamond tool for precision machining by ultrasonic waves comprises the following steps:
selecting an abrasive: the abrasive is 200 or 300 mesh diamond;
selecting a metal matrix raw material: the raw material is NiCuCoSn alloy powder with 300 or 400 meshes, and the components of the NiCuCoSn alloy powder are 5 to 9 weight percent of Cu, 2 weight percent of Co, 3 weight percent of Sn and the balance of Ni; or 300 or 400 mesh CuCoSn alloy powder, which comprises 6 to 8wt.% Co, 10wt.% Sn and the balance Cu; or 300 or 400 mesh FeCoSn alloy powder, which comprises 6 to 8wt.% Co, 10wt.% Sn and the balance Fe;
uniformly mixing the used abrasive and metal matrix powder;
sintering the uniformly mixed abrasive and metal matrix powder to prepare a sintered composite sheet with the thickness of 1-3 mm;
removing greasy dirt and other dirt on the surface of a sintered diamond tool for precision machining to be repaired, placing a sintered composite sheet at the position to be repaired of the sintered diamond tool to be repaired, and pressing by using a welding head of an ultrasonic welder;
parameters of ultrasonic welding are set as follows: the working face of the welding head of the ultrasonic welder is 4-9 mm 2 The static pressure of welding is 200-400N, the ultrasonic amplitude is 14-18 mu m, the ultrasonic frequency is 12-18 KHz, and the welding time is 0.5-1.5 s;
starting an ultrasonic welder to finish welding;
repeating the steps (5) - (7) to finish repairing other parts to be repaired of the sintered diamond tool, and finishing the finished repaired parts;
the sintering parameters of the sintering composite sheet are as follows: under the vacuum environment, the hot pressing temperature is 600-850 ℃, the hot pressing pressure is 18-25 MPa, the hot pressing time is 2-6 min, and the heat preservation time is 3-5 min.
The method for repairing the sintered diamond tool for precision machining by ultrasonic repair welding has the advantages that:
the ultrasonic welding adopted by the invention has the advantages of short welding time, high efficiency, energy conservation, environmental protection, special-shaped surface welding, convenient operation and the like.
The sintered diamond tool for precision machining repaired by the process can keep good mechanical properties of the matrix and the fine abrasive grains of the sintered body.
The sintered diamond tool for precision machining repaired by the process has the advantages that welding defects such as slag inclusion and the like do not occur at the welding seam, and the bonding strength of the welding seam is high and stable.
The sintered diamond tool for repairing precision machining by using the process has low rejection rate.
Detailed Description
The invention will be described in detail with reference to the examples given:
example 1: and repairing the sintered diamond bowl-shaped grinding wheel for precision machining by using the Ni-based diamond composite sheet.
The method comprises the following steps:
selecting an abrasive: the abrasive is 200 or 300 mesh diamond;
selecting a metal matrix raw material: the raw material is NiCuCoSn alloy powder with 300 or 400 meshes, and the components of the NiCuCoSn alloy powder are 6wt.% Cu, 2wt.% Co, 3wt.% Sn and the balance Ni;
uniformly mixing the used abrasive and metal matrix powder;
sintering the uniformly mixed abrasive and metal matrix powder to prepare a sintered composite sheet with the thickness of 2 mm;
removing greasy dirt and other dirt on the surface of a sintered diamond tool for precision machining to be repaired, placing a sintered composite sheet at the position to be repaired of the sintered diamond tool to be repaired, and pressing by using a welding head of an ultrasonic welder;
parameters of ultrasonic welding are set as follows: the working face of the welding head of the ultrasonic welder is 2.5 multiplied by 2.5mm 2 The welding static pressure is 300N, the ultrasonic amplitude is 16 mu m, the ultrasonic frequency is 16KHz, and the welding time is 0.6s;
starting an ultrasonic welder to finish welding;
repeating the steps (5) - (7) to finish repairing other parts to be repaired of the sintered diamond tool, and finishing the finished repaired parts;
the sintering parameters of the sintering composite sheet are as follows: under the vacuum environment, the hot pressing temperature is 750 ℃, the hot pressing pressure is 20MPa, the hot pressing time is 5min, and the heat preservation time is 4min.
Example 2: repairing the sintered diamond grinding head for precision machining by using the Cu-based diamond composite sheet.
The method comprises the following steps:
selecting an abrasive: the abrasive is 200 or 300 mesh diamond;
selecting a metal matrix raw material: the raw material is 300 or 400 mesh CuCoSn alloy powder, and the ingredients of the CuCoSn alloy powder are 7.5wt.% Co, 10wt.% Sn and the balance Cu;
uniformly mixing the used abrasive and metal matrix powder;
sintering the uniformly mixed abrasive and metal matrix powder to prepare a sintered composite sheet with the thickness of 2 mm;
removing greasy dirt and other dirt on the surface of a sintered diamond tool for precision machining to be repaired, placing a sintered composite sheet at the position to be repaired of the sintered diamond tool to be repaired, and pressing by using a welding head of an ultrasonic welder;
parameters of ultrasonic welding are set as follows: the working face of the welding head of the ultrasonic welder is 2.2 multiplied by 2.2mm 2 The static pressure of welding is 250N, the ultrasonic amplitude is 17 mu m, the ultrasonic frequency is 14KHz, and the welding time is 0.8s;
starting an ultrasonic welder to finish welding;
repeating the steps (5) - (7) to finish repairing other parts to be repaired of the sintered diamond tool, and finishing the finished repaired parts;
the sintering parameters of the sintering composite sheet are as follows: under the vacuum environment, the hot pressing temperature is 650 ℃, the hot pressing pressure is 20MPa, the hot pressing time is 4min, and the heat preservation time is 3.5min.
Example 3: and repairing the sintered diamond saw blade for precision machining by using the Fe-based diamond composite sheet.
Comprises the following steps:
selecting an abrasive: the abrasive is 200 or 300 mesh diamond;
selecting a metal matrix raw material: the raw material is FeCoSn alloy powder with 300 or 400 meshes, and the ingredients of the FeCoSn alloy powder are 7wt.% Co, 10wt.% Sn and the balance Fe;
uniformly mixing the used abrasive and metal matrix powder;
sintering the uniformly mixed abrasive and metal matrix powder to prepare a sintered composite sheet with the thickness of 2 mm;
removing greasy dirt and other dirt on the surface of a sintered diamond tool for precision machining to be repaired, placing a sintered composite sheet at the position to be repaired of the sintered diamond tool to be repaired, and pressing by using a welding head of an ultrasonic welder;
parameters of ultrasonic welding are set as follows: the working face of the welding head of the ultrasonic welder is 2.7 multiplied by 2.7mm 2 The welding static pressure is 300N, the ultrasonic amplitude is 16 mu m, the ultrasonic frequency is 16KHz, and the welding time is 0.7s;
starting an ultrasonic welder to finish welding;
repeating the steps (5) - (7) to finish repairing other parts to be repaired of the sintered diamond tool, and finishing the finished repaired parts;
the sintering parameters of the sintering composite sheet are as follows: under the vacuum environment, the hot pressing temperature is 780 ℃, the hot pressing pressure is 22MPa, the hot pressing time is 5min, and the heat preservation time is 4min.
The above description is only for the preferred embodiments of the present invention and is not intended to limit the invention in any way, and any person skilled in the art may make modifications or alterations to the disclosed technical content to the equivalent embodiments. However, any simple modification, equivalent variation and variation of the above embodiments according to the technical substance of the present invention still fall within the protection scope of the present invention.
Claims (1)
1. A method for repairing a sintered diamond tool for precision machining by ultrasonic waves, characterized by:
the method comprises the following steps:
(1) Selecting an abrasive: the abrasive is 200 or 300 mesh diamond;
(2) Selecting a metal matrix raw material: the raw material is NiCuCoSn alloy powder with 300 or 400 meshes, and the components of the NiCuCoSn alloy powder are 5 to 9 weight percent of Cu, 2 weight percent of Co, 3 weight percent of Sn and the balance of Ni; or 300 or 400 mesh CuCoSn alloy powder, which comprises 6 to 8wt.% Co, 10wt.% Sn and the balance Cu; or 300 or 400 mesh FeCoSn alloy powder, which comprises 6 to 8wt.% Co, 10wt.% Sn and the balance Fe;
(3) Uniformly mixing the used abrasive and metal matrix powder;
(4) Sintering the uniformly mixed abrasive and metal matrix powder to prepare a sintered composite sheet with the thickness of 1-3 mm;
(5) Removing greasy dirt and other dirt on the surface of a sintered diamond tool for precision machining to be repaired, placing a sintered composite sheet at the position to be repaired of the sintered diamond tool to be repaired, and pressing by using a welding head of an ultrasonic welder;
(6) Parameters of ultrasonic welding are set as follows: the working face of the welding head of the ultrasonic welder is 4-9 mm 2 The static pressure of welding is 200-400N, the ultrasonic amplitude is 14-18 mu m, the ultrasonic frequency is 12-18 KHz, and the welding time is 0.5-1.5 s;
(7) Starting an ultrasonic welder to finish welding;
(8) Repeating the steps (5) - (7) to finish repairing other parts to be repaired of the sintered diamond tool, and finishing the finished repaired parts;
the preparation of the sintering composite sheet specifically uses the following sintering parameters: under the vacuum environment, the hot pressing temperature is 600-850 ℃, the hot pressing pressure is 18-25 MPa, the hot pressing time is 2-6 min, and the heat preservation time is 3-5 min.
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|---|---|---|---|
| CN202110659432.3A CN113305362B (en) | 2021-06-15 | 2021-06-15 | Method for repairing sintered diamond tool for precision machining through ultrasonic waves |
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| CN202110659432.3A CN113305362B (en) | 2021-06-15 | 2021-06-15 | Method for repairing sintered diamond tool for precision machining through ultrasonic waves |
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| CN113305362A CN113305362A (en) | 2021-08-27 |
| CN113305362B true CN113305362B (en) | 2024-04-02 |
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| CN114571197B (en) * | 2022-04-15 | 2022-12-13 | 青岛科技大学 | Novel method for protecting welding part of sintered diamond saw blade for wet cutting |
| CN115533103A (en) * | 2022-10-13 | 2022-12-30 | 青岛科技大学 | Novel method for manufacturing superhard material sintered body for cutting reinforced concrete |
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