CN110744063A - Preparation method of composite ceramic cutting saw blade - Google Patents

Preparation method of composite ceramic cutting saw blade Download PDF

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Publication number
CN110744063A
CN110744063A CN201910839769.5A CN201910839769A CN110744063A CN 110744063 A CN110744063 A CN 110744063A CN 201910839769 A CN201910839769 A CN 201910839769A CN 110744063 A CN110744063 A CN 110744063A
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outer layer
diamond
tool bit
saw blade
layer
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邱瑜铭
董先龙
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Jiangsu Feng Tai Tools Co Ltd
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Jiangsu Feng Tai Tools Co Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F7/00—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression
    • B22F7/06—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite workpieces or articles from parts, e.g. to form tipped tools
    • B22F7/062—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite workpieces or articles from parts, e.g. to form tipped tools involving the connection or repairing of preformed parts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/02—Compacting only
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/12—Both compacting and sintering
    • B22F3/14—Both compacting and sintering simultaneously
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
    • 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
    • B23K1/00—Soldering, e.g. brazing, or unsoldering
    • B23K1/19—Soldering, e.g. brazing, or unsoldering taking account of the properties of the materials to be soldered
    • 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
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/36—Removing material
    • B23K26/38—Removing material by boring or cutting
    • 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
    • B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
    • B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
    • B23K35/24—Selection of soldering or welding materials proper
    • B23K35/30—Selection of soldering or welding materials proper with the principal constituent melting at less than 1550 degrees C
    • B23K35/3006—Ag as the principal constituent
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28D—WORKING STONE OR STONE-LIKE MATERIALS
    • B28D1/00—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor
    • B28D1/02—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by sawing
    • B28D1/04—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by sawing with circular or cylindrical saw-blades or saw-discs
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C26/00—Alloys containing diamond or cubic or wurtzitic boron nitride, fullerenes or carbon nanotubes
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C30/00—Alloys containing less than 50% by weight of each constituent
    • C22C30/02—Alloys containing less than 50% by weight of each constituent containing copper
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C30/00—Alloys containing less than 50% by weight of each constituent
    • C22C30/04—Alloys containing less than 50% by weight of each constituent containing tin or lead
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
    • B22F2005/001—Cutting tools, earth boring or grinding tool other than table ware
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy
    • B22F2998/10—Processes characterised by the sequence of their steps
    • 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
    • B23K2103/00—Materials to be soldered, welded or cut
    • B23K2103/50—Inorganic material, e.g. metals, not provided for in B23K2103/02 – B23K2103/26
    • B23K2103/52—Ceramics

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Composite Materials (AREA)
  • Mining & Mineral Resources (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Plasma & Fusion (AREA)
  • Polishing Bodies And Polishing Tools (AREA)

Abstract

The invention discloses a preparation method of a composite ceramic cutting disc, and belongs to the technical field of ceramic material cutting processing. The diamond tool bit of the ceramic cutting blade is formed by sequentially compounding an outer layer I, a middle layer and an outer layer II along the axial direction of a saw blade matrix, and during preparation, an outer layer I pressing sheet, an outer layer II pressing sheet and a middle layer pressing sheet are formed by cold pressing; sequentially placing the outer layer pressing sheet I, the middle layer pressing sheet and the outer layer pressing sheet II in a hot pressing mold for hot pressing and sintering into a whole to obtain the diamond cutter head; and finally, welding the tool bit to the saw blade substrate in a brazing mode. According to the invention, the diamond tool bit with a three-layer structure is designed, and a specific preparation process is matched, when ceramic materials are cut, the sharpness is greatly improved due to the coarse diamond particles in the middle layer, a cutting groove is formed in the middle layer, the edge explosion phenomenon cannot occur due to the fine diamond particle size cutting of the outer layer, the outer layer is abraded slower than the inner layer, two cutting edges are formed, and the cutting is more stable and sharper.

Description

Preparation method of composite ceramic cutting saw blade
Technical Field
The invention relates to the technical field of ceramic material cutting processing, in particular to a preparation method of a composite ceramic cutting piece.
Background
In the building industry nowadays, as the national mine exploitation control is more and more strict, the consumption of natural stone is greatly reduced, and ceramic materials become important materials in decoration, and the ceramic processing industry is more and more extensive therewith.
The ceramic cutting blade is composed of a disc-shaped substrate and a diamond cutter head connected to the outer edge of the substrate, is widely applied to cutting of ceramic materials, is mainly used for trimming and cutting in ceramic cutting, and is required to have good cutting performance due to high hardness of ceramic.
The ceramic cutting blade has the advantages of high hardness, good wear resistance and the like, but in ceramic processing, when the condition of edge explosion is good, fine-particle diamond is required to be adopted, but the grinding sharpness is obviously reduced by using the fine-particle diamond; the grinding sharpness can be obviously improved by adopting the coarse-grain diamond, but the ceramic edge explosion condition becomes serious after cutting. The problem that the edge bursting and the cutting sharpness of the material are mutually contradictory, which becomes a main problem troubling the industry, is solved.
Disclosure of Invention
In order to solve the problem that the material edge explosion and the cutting sharpness are mutually contradictory in the existing ceramic processing technology, the invention aims to provide a preparation method of a composite ceramic cutting piece, a composite diamond tool bit is designed and prepared, the cutting is more stable and sharper, and the problem that the cutting sharpness and the edge explosion are mutually contradictory is fundamentally solved.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
the composite ceramic cutting blade comprises a saw blade matrix and a diamond tool bit, wherein the diamond tool bit is of a three-layer structure formed by sequentially compounding an outer layer I, a middle layer and an outer layer II along the axial direction of the saw blade matrix; the preparation method of the composite ceramic cutting disc comprises the following steps:
(1) processing a matrix:
punching a saw blade matrix made of 75Cr1 material according to the drawing requirements;
(2) sintering and forming the diamond tool bit:
respectively weighing raw materials according to the material components of the outer layer I, the outer layer II and the middle layer of the diamond tool bit, uniformly mixing the raw materials of each layer according to the proportion, and respectively cold-pressing and tabletting to obtain an outer layer I tabletting, an outer layer II tabletting and a middle layer tabletting; sequentially placing the outer layer pressing sheet I, the middle layer pressing sheet and the outer layer pressing sheet II in a hot pressing mold for hot pressing and sintering into a whole to obtain the diamond cutter head;
(3) and welding the diamond cutter head on the saw blade substrate, and cutting out a heat dissipation groove through laser cutting to obtain the diamond saw blade.
In the step (2), when the hot-pressing sintering is carried out, the hot-pressing sintering temperature is 820-860 ℃, and the pressure is 100-150 kg/cm2Keeping the temperature for 60 minutes, and discharging and naturally cooling.
In the step (3), the diamond tool bit is welded on the saw blade substrate by adopting a brazing mode, SnAg brazing filler metal is adopted, the brazing temperature is 800-. In the SnAg solder, the Ag content is 3.0-4.0%, and the balance is Sn.
The outer layer I and the outer layer II of the diamond tool bit are made of the following materials in percentage by weight:
30-35% of copper, 35-40% of iron, 7-10% of nickel, 10-15% of cobalt, 7-10% of tin, 1.0-2.1% of rare earth alloy and 7-9% of diamond;
the outer layer I and the outer layer II of the diamond tool bit are made of the following materials in percentage by weight:
30-35% of copper, 25-30% of iron, 6-8% of nickel, 30-40% of iron-copper-tin alloy powder, 6-9% of tin, 1.6-2.0% of rare earth alloy and 7-9% of diamond;
the outer layer I and the outer layer II of the diamond tool bit are made of the following materials in percentage by weight:
30-35% of copper, 35-40% of iron, 6-8% of nickel, 20-25% of iron-copper-tin alloy powder, 6-9% of tin, 1.6-2.0% of rare earth alloy and 7-9% of diamond.
The middle layer of the diamond tool bit comprises the following materials in percentage by weight:
25-30% of copper, 20-30% of iron, 5-7% of nickel, 25-35% of iron-copper-tin alloy powder, 7-10% of tin, 1.0-2.1% of rare earth alloy and 3.5-5% of diamond.
The middle layer of the diamond tool bit comprises the following materials in percentage by weight:
25-30% of copper, 45-50% of iron, 3-5% of nickel, 15-20% of iron-copper-tin alloy powder, 6-9% of tin, 1.6-2.0% of rare earth alloy and 3.5-5% of diamond;
the middle layer of the diamond tool bit comprises the following materials in percentage by weight:
25-30% of copper, 60-65% of iron, 3-5% of nickel, 6-9% of tin, 1.6-2.0% of rare earth alloy and 3.5-5% of diamond.
The saw blade matrix is made of 75Cr1 material; the rare earth alloy is La-Ni alloy, La in the La-Ni alloy is 20-22 wt.%, and the balance is Ni, and the iron-copper-tin alloy powder comprises the following components: 18-25 wt.% of Cu, 5-12 wt.% of Sn, 1.5-2.5 wt.% of Zn, and the balance of Fe.
The granularity of the diamond in the material of the outer layer I and the material of the outer layer II of the cutter head is 60-80 meshes, and the granularity of the diamond in the material of the middle layer of the cutter head is 40-50 meshes; the compressive strength of the diamond is 18-24 kg.
The thicknesses of the outer layer I and the outer layer II of the diamond tool bit are greater than or equal to the thickness of the middle layer; the periphery of the ceramic cutting saw blade is provided with heat dissipation grooves which are distributed along the center of the saw blade in a surrounding way, and the width of each heat dissipation groove is 0.5-3 mm; the center of the diamond saw blade is provided with a mounting hole.
The invention solves the processing problem at present through special material and process design, and the design principle and the beneficial effect of the invention are as follows:
1. according to the composite type tool bit material, through the composite type research design of the tool bit material, the outer layer of the tool bit is made of fine-particle high-concentration diamonds, the matrix material is made of a slightly strong wear-resistant material, the inner layer of the tool bit is made of coarse-particle low-concentration diamonds, the matrix is made of a slightly weak wear-resistant material, so that the sharpness is greatly improved due to the coarse-particle diamonds in the middle layer during cutting, the matrix performance is weak due to the low concentration of the middle layer, the abrasion is faster than that of the two outer layers, a cutting groove is formed in the middle of the outer layers, due to the fact that the diamond particle size of the outer layers is fine, the phenomenon of edge explosion is not generated during cutting of ceramic, the diamond concentration of the matrix in the outer layers is high, the outer layers are abraded.
2. According to the invention, the saw blade matrix and the cutter head adopt special laser grooving design, so that the internal stress generated in the production and use processes of the saw blade can be effectively dispersed when the groove width is optimized, the matrix deformation is avoided, and the chip removal and the heat dissipation performance of the saw blade are better ensured when the saw blade is used.
3. The substrate of the ceramic cutting blade is made of high-performance 75Cr1 steel, so that the substrate is not easy to deform when being heated during cutting.
4. The invention adopts a brazing process to weld the diamond tool bit and the saw blade matrix together, adopts SnAg brazing filler metal, adds Sn into the low-silver brazing filler metal, and simultaneously because the materials of the outer layer I and the outer layer II of the diamond tool bit contain iron-copper-tin alloy powder, the alloy elements in the tool bit and the brazing metal can be infinitely dissolved to reduce the interfacial tension, improve the wettability of the brazing filler metal, thereby improving the binding force of the tool bit and the saw blade matrix.
Drawings
FIG. 1 is a schematic structural view of a ceramic cutting blade according to the present invention.
In the figure: 1-saw blade matrix; 2-a diamond tool bit; and 3-radiating grooves.
Detailed Description
For a further understanding of the present invention, the following description is given in conjunction with the examples which are set forth to illustrate, but are not to be construed to limit the present invention, features and advantages.
The invention provides a composite ceramic cutting blade, which has a structure shown in figure 1. The ceramic cutting blade comprises a saw blade matrix 1 and a diamond tool bit 2, wherein the diamond tool bit is of a three-layer structure formed by sequentially compounding an outer layer I, a middle layer and an outer layer II along the axial direction of the saw blade matrix, and the thicknesses of the outer layer I and the outer layer II of the diamond tool bit are larger than or equal to that of the middle layer.
The saw blade matrix is made of 75Cr1 material, the periphery of the ceramic cutting blade is provided with heat dissipation grooves 3 which are distributed along the center of the saw blade in a surrounding way, and the width of each heat dissipation groove is 0.5-3 mm; the center of the diamond saw blade is provided with a mounting hole.
The following example is a process for making ceramic cutting inserts in which the diamond grit of the insert outer layer I and outer layer II materials is 60/80 mesh, and the diamond grit of the insert intermediate layer material is 40/50 mesh; the compressive strength of the diamond is 20 kg.
In the diamond tool bit material, the rare earth alloy is La-Ni alloy, La in the La-Ni alloy is 20 wt.%, and the balance is Ni, and the iron-copper-tin alloy powder comprises the following components: cu 20 wt.%, Sn 6 wt.%, Zn 2 wt.%, balance Fe.
In the SnAg solder used in the soldering, the Ag content is 3.6%, and the rest is Sn.
Example 1:
the embodiment is a preparation process of a ceramic cutting blade, which specifically comprises the following steps:
1. processing a matrix:
punching a saw blade matrix made of 75Cr1 material according to the drawing requirements;
2. respectively weighing raw materials according to the material components of the outer layer I, the outer layer II and the middle layer of the diamond tool bit, uniformly mixing the raw materials of each layer according to the proportion, and respectively cold-pressing and tabletting to obtain an outer layer I tabletting, an outer layer II tabletting and a middle layer tabletting; wherein:
preparing an outer layer I tabletting and an outer layer II tabletting of the cutter head:
taking 3.2kg of copper powder, 3.9kg of iron powder, 0.7kg of nickel powder, 1.2kg of cobalt powder, 0.8kg of tin powder and 0.15kg of rare earth alloy, putting the materials into a mixing barrel, mixing the materials for 30 minutes, adding 0.13kg of liquid paraffin, adding 710 g of diamond particles with the granularity of 70/80 meshes, continuously mixing the materials for 10 minutes, and then filling the powder into a feed hopper of cold-press molding equipment.
Preparing a cutter head interlayer pressing sheet:
1.5kg of copper powder, 1.3kg of iron powder, 0.25kg of nickel powder, 0.15kg of iron-copper-tin alloy powder, 0.4kg of tin powder and 0.007kg of rare earth alloy are put into a mixing barrel and mixed for 30 minutes, 0.07kg of liquid paraffin is added, 250 g of diamond particles with the granularity of 40/50 meshes are added, the materials are continuously mixed for 10 minutes, and then the powder is poured into a feeding hopper of cold-press molding equipment and is subjected to cold-press molding.
3. Sequentially placing the outer layer pressing sheet I, the middle layer pressing sheet and the outer layer pressing sheet II in a hot pressing mold for hot pressing and sintering into a whole to obtain the diamond cutter head;
the hot-pressing sintering temperature is 840 ℃, and the pressure is 100kg/cm2Keeping the temperature for 60 minutes, and discharging and naturally cooling.
4. The diamond tip is welded to the saw blade substrate.
The soldering method is adopted, SnAg solder is used, the soldering temperature is 810 ℃, and the soldering time is 10-15 seconds.
5. And after the brazing is finished and the product is qualified through inspection, carrying out laser groove cutting on the product. And according to the specific requirements of the drawing, a cutting program is programmed on the laser machine, the laser cutting power is adjusted, and the required saw blade heat dissipation groove is cut.
6. And polishing and grinding the surface of the ceramic chip substrate subjected to laser cutting by using a steel wire wheel, performing surface paint spraying, grinding the working surface of the diamond tool bit by using a special grinding wheel edging machine, exposing the diamond, and performing silk-screen printing, packaging and warehousing after the diamond is qualified.
Example 2:
the embodiment is a preparation process of a ceramic cutting blade, which specifically comprises the following steps:
1. processing a matrix:
punching a saw blade matrix made of 75Cr1 material according to the drawing requirements;
2. respectively weighing raw materials according to the material components of the outer layer I, the outer layer II and the middle layer of the diamond tool bit, uniformly mixing the raw materials of each layer according to the proportion, and respectively cold-pressing and tabletting to obtain an outer layer I tabletting, an outer layer II tabletting and a middle layer tabletting; wherein:
preparing an outer layer I tabletting and an outer layer II tabletting of the cutter head:
taking 3.0kg of copper powder, 2.6kg of iron powder, 0.6kg of nickel powder, 0.35kg of iron-copper-tin alloy powder, 0.7kg of tin powder and 0.18kg of rare earth alloy, putting the materials into a mixing barrel, mixing for 30 minutes, adding 0.13kg of liquid paraffin, adding 750 g of diamond particles with the granularity of 70/80 meshes, continuously mixing for 10 minutes, filling the powder into a feeding hopper of cold-press molding equipment, and performing cold-press molding.
Preparing a cutter head interlayer pressing sheet:
taking 0.14kg of copper powder, 0.23kg of iron powder, 0.025kg of nickel powder, 0.10kg of iron-copper-tin alloy powder, 0.045kg of tin powder and 0.01kg of rare earth alloy, putting the materials into a mixing barrel, mixing for 30 minutes, adding 0.07kg of liquid paraffin, adding 22 g of diamond particles with the granularity of 40/50 meshes, continuously mixing for 10 minutes, filling the powder into a feeding hopper of cold-press molding equipment, and performing cold-press molding.
3. Sequentially placing the outer layer pressing sheet I, the middle layer pressing sheet and the outer layer pressing sheet II in a hot pressing mold for hot pressing and sintering into a whole to obtain the diamond cutter head;
the hot-pressing sintering temperature is 860 ℃ and the pressure is 100kg/cm2Keeping the temperature for 60 minutes, and discharging and naturally cooling.
4. The diamond tip is welded to the saw blade substrate.
The soldering method is adopted, SnAg solder is used, the soldering temperature is 810 ℃, and the soldering time is 10-15 seconds.
5. And after the brazing is finished and the product is qualified through inspection, carrying out laser groove cutting on the product. And according to the specific requirements of the drawing, a cutting program is programmed on the laser machine, the laser cutting power is adjusted, and the required saw blade heat dissipation groove is cut.
6. And polishing and grinding the surface of the ceramic chip substrate subjected to laser cutting by using a steel wire wheel, performing surface paint spraying, grinding the working surface of the diamond tool bit by using a special grinding wheel edging machine, exposing the diamond, and performing silk-screen printing, packaging and warehousing after the diamond is qualified.
Example 3:
the embodiment is a preparation process of a ceramic cutting blade, which specifically comprises the following steps:
1. processing a matrix:
punching a saw blade matrix made of 75Cr1 material according to the drawing requirements;
2. respectively weighing raw materials according to the material components of the outer layer I, the outer layer II and the middle layer of the diamond tool bit, uniformly mixing the raw materials of each layer according to the proportion, and respectively cold-pressing and tabletting to obtain an outer layer I tabletting, an outer layer II tabletting and a middle layer tabletting; wherein:
preparing an outer layer I tabletting and an outer layer II tabletting of the cutter head:
taking 3.0kg of copper powder, 3.4kg of iron powder, 0.6kg of nickel powder, 0.2kg of iron-copper-tin alloy powder, 0.9kg of tin powder and 0.18kg of rare earth alloy, putting the materials into a mixing barrel, mixing for 30 minutes, adding 0.13kg of liquid paraffin, adding 780 g of diamond particles with the granularity of 70/80 meshes, continuously mixing for 10 minutes, and then filling the powder into a feeding hopper of cold-press molding equipment.
Preparing a cutter head interlayer pressing sheet:
1.5kg of copper powder, 0.305kg of iron powder, 0.15kg of nickel powder, 0.45kg of tin powder and 0.09kg of rare earth alloy are taken, put into a mixing barrel and mixed for 30 minutes, 0.07kg of liquid paraffin is added, 180 g of diamond particles with the granularity of 40/50 meshes are added, the materials are continuously mixed for 10 minutes, and then the powder is poured into a feeding hopper of cold-press molding equipment for cold-press molding.
3. Sequentially placing the outer layer pressing sheet I, the middle layer pressing sheet and the outer layer pressing sheet II in a hot pressing mold for hot pressing and sintering into a whole to obtain the diamond cutter head;
the hot-pressing sintering temperature is 860 ℃ and the pressure is 100kg/cm2Keeping the temperature for 60 minutes, and discharging and naturally cooling.
4. The diamond tip is welded to the saw blade substrate.
The soldering method is adopted, SnAg solder is used, the soldering temperature is 810 ℃, and the soldering time is 10-15 seconds.
5. And after the brazing is finished and the product is qualified through inspection, carrying out laser groove cutting on the product. And according to the specific requirements of the drawing, a cutting program is programmed on the laser machine, the laser cutting power is adjusted, and the required saw blade heat dissipation groove is cut.
6. And polishing and grinding the surface of the ceramic chip substrate subjected to laser cutting by using a steel wire wheel, performing surface paint spraying, grinding the working surface of the diamond tool bit by using a special grinding wheel edging machine, exposing the diamond, and performing silk-screen printing, packaging and warehousing after the diamond is qualified.
The ceramic cutting chip fabricated in the above examples 1 to 3 was subjected to the performance test, and the results are shown in the following table 1.
TABLE 1 results of testing the performance of the tips of ceramic cutting inserts prepared in examples 1-3
Figure BSA0000189757590000081
At 600N/mm2The strength standards were acceptable for each of the diamond tips produced in examples 1-3, as measured by weld strength.
Utilize the ceramic cutting piece of above-mentioned embodiment 1-3 preparation to carry out the cutting of ceramic material, observe after the cutting a period, because the outer fine particle high concentration diamond that adopts of tool bit, matrix material adopts the wearability material that is stronger slightly, the tool bit inlayer adopts coarse particle low concentration diamond, the matrix adopts the wearability material that is weaker slightly, middle level coarse particle diamond can make the sharpness promote by a wide margin when the cutting like this, the low matrix performance of middle level concentration is weak, can be fast than two outer wearing and tearing like this, form a cutting groove in the centre, the skin is because the diamond particle size is thin, the cutting pottery can not produce the edge explosion phenomenon, outer matrix wearability strong diamond concentration is high, the skin can be more slow than the inlayer wearing and tearing, form two cutting edges.
The heat dissipation groove with a certain width is designed on the ceramic cutting sheet, so that the internal stress generated by the saw blade in the production and use processes can be effectively dispersed, the deformation of a matrix is avoided, and the better chip removal and heat dissipation performance of the saw blade in use are ensured.

Claims (10)

1. A preparation method of a composite ceramic cutting blade is characterized by comprising the following steps: the composite ceramic cutting blade comprises a saw blade matrix and a diamond tool bit, wherein the diamond tool bit is of a three-layer structure formed by sequentially compounding an outer layer I, a middle layer and an outer layer II along the axial direction of the saw blade matrix; the preparation method of the composite ceramic cutting disc comprises the following steps:
(1) processing a matrix:
punching a saw blade matrix made of 75Cr1 material according to the drawing requirements;
(2) sintering and forming the diamond tool bit:
respectively weighing raw materials according to the material components of the outer layer I, the outer layer II and the middle layer of the diamond tool bit, uniformly mixing the raw materials of each layer according to the proportion, and respectively cold-pressing and tabletting to obtain an outer layer I tabletting, an outer layer II tabletting and a middle layer tabletting; sequentially placing the outer layer pressing sheet I, the middle layer pressing sheet and the outer layer pressing sheet II in a hot pressing mold for hot pressing and sintering into a whole to obtain the diamond cutter head;
(3) and welding the diamond cutter head on the saw blade substrate, and cutting out a heat dissipation groove through laser cutting to obtain the diamond saw blade.
2. The method for producing a composite ceramic cutting chip according to claim 1, characterized in that: in the step (2), when hot-pressing sintering is carried out, the hot-pressing sintering temperature is 820-860 ℃, and the pressure is 100-150 kg/cm2Keeping the temperature for 60 minutes, and discharging and naturally cooling.
3. The method for producing a composite ceramic cutting chip according to claim 1, characterized in that: in the step (3), the diamond tool bit is welded on the saw blade substrate in a brazing mode, SnAg brazing filler metal is adopted, the brazing temperature is 800-.
4. A method for producing a composite ceramic cutting chip according to claim 3, characterized in that: in the SnAg solder, the Ag content is 3.0-4.0%, and the balance is Sn.
5. The method for producing a composite ceramic cutting chip according to claim 1, characterized in that: the outer layer I and the outer layer II of the diamond tool bit are made of the following materials in percentage by weight:
30-35% of copper, 35-40% of iron, 7-10% of nickel, 10-15% of cobalt, 7-10% of tin, 1.0-2.1% of rare earth alloy and 7-9% of diamond;
the middle layer of the diamond tool bit comprises the following materials in percentage by weight:
25-30% of copper, 20-30% of iron, 5-7% of nickel, 25-35% of iron-copper-tin alloy powder, 7-10% of tin, 1.0-2.1% of rare earth alloy and 3.5-5% of diamond.
6. The method for producing a composite ceramic cutting chip according to claim 1, characterized in that: the outer layer I and the outer layer II of the diamond tool bit are made of the following materials in percentage by weight:
30-35% of copper, 25-30% of iron, 6-8% of nickel, 30-40% of iron-copper-tin alloy powder, 6-9% of tin, 1.6-2.0% of rare earth alloy and 7-9% of diamond;
the middle layer of the diamond tool bit comprises the following materials in percentage by weight:
25-30% of copper, 45-50% of iron, 3-5% of nickel, 15-20% of iron-copper-tin alloy powder, 6-9% of tin, 1.6-2.0% of rare earth alloy and 3.5-5% of diamond.
7. The method for producing a composite ceramic cutting chip according to claim 1, characterized in that: the outer layer I and the outer layer II of the diamond tool bit are made of the following materials in percentage by weight:
30-35% of copper, 35-40% of iron, 6-8% of nickel, 20-25% of iron-copper-tin alloy powder, 6-9% of tin, 1.6-2.0% of rare earth alloy and 7-9% of diamond;
the middle layer of the diamond tool bit comprises the following materials in percentage by weight:
25-30% of copper, 60-65% of iron, 3-5% of nickel, 6-9% of tin, 1.6-2.0% of rare earth alloy and 3.5-5% of diamond.
8. A method for producing a composite ceramic cutting chip according to any one of claims 5 to 7, characterized in that: the saw blade matrix is made of 75Cr1 material; the rare earth alloy is La-Ni alloy, La in the La-Ni alloy is 20-22 wt.%, and the balance is Ni, and the iron-copper-tin alloy powder comprises the following components: 18-25 wt.% of Cu, 5-12 wt.% of Sn, 1.5-2.5 wt.% of Zn, and the balance of Fe.
9. A method for producing a composite ceramic cutting chip according to any one of claims 5 to 7, characterized in that: the granularity of the diamond in the material of the outer layer I and the material of the outer layer II of the cutter head is 60-80 meshes, and the granularity of the diamond in the material of the middle layer of the cutter head is 40-50 meshes; the compressive strength of the diamond is 18-24 kg.
10. A method for producing a composite ceramic cutting chip according to any one of claims 5 to 7, characterized in that: the thicknesses of the outer layer I and the outer layer II of the diamond tool bit are greater than or equal to the thickness of the middle layer; the periphery of the ceramic cutting saw blade is provided with heat dissipation grooves which are distributed along the center of the saw blade in a surrounding way, and the width of each heat dissipation groove is 0.5-3 mm; the center of the diamond saw blade is provided with a mounting hole.
CN201910839769.5A 2019-09-05 2019-09-05 Preparation method of composite ceramic cutting saw blade Pending CN110744063A (en)

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3724913A1 (en) * 1987-07-28 1989-02-09 Richard Hahn Diamant Werkzeuge Method of manufacturing a diamond bandsaw blade, and diamond bandsaw blade manufactured according to this method
JP2000326232A (en) * 1999-05-13 2000-11-28 Atokku:Kk Cbn blade for cutting hard material, and cutter
CN201095162Y (en) * 2007-09-03 2008-08-06 泉州市洛江区双阳金刚石工具有限公司 Diamond gang saw tool bit with laminated segmented structure
CN105252448A (en) * 2015-10-28 2016-01-20 江苏锋泰工具有限公司 Manufacturing process for dry grinding diamond grinding wheel
CN106182448A (en) * 2016-08-19 2016-12-07 广州晶体科技有限公司 Sandwich-type gang saw tool bit and manufacture method thereof
CN108582504A (en) * 2018-05-07 2018-09-28 江苏锋泰工具有限公司 Energy-efficient diamond saw blade and preparation method thereof
CN108748702A (en) * 2018-06-15 2018-11-06 威海职业学院 Diamond saw blade

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3724913A1 (en) * 1987-07-28 1989-02-09 Richard Hahn Diamant Werkzeuge Method of manufacturing a diamond bandsaw blade, and diamond bandsaw blade manufactured according to this method
JP2000326232A (en) * 1999-05-13 2000-11-28 Atokku:Kk Cbn blade for cutting hard material, and cutter
CN201095162Y (en) * 2007-09-03 2008-08-06 泉州市洛江区双阳金刚石工具有限公司 Diamond gang saw tool bit with laminated segmented structure
CN105252448A (en) * 2015-10-28 2016-01-20 江苏锋泰工具有限公司 Manufacturing process for dry grinding diamond grinding wheel
CN106182448A (en) * 2016-08-19 2016-12-07 广州晶体科技有限公司 Sandwich-type gang saw tool bit and manufacture method thereof
CN108582504A (en) * 2018-05-07 2018-09-28 江苏锋泰工具有限公司 Energy-efficient diamond saw blade and preparation method thereof
CN108748702A (en) * 2018-06-15 2018-11-06 威海职业学院 Diamond saw blade

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Application publication date: 20200204