CN112548881A - Preparation method of diamond roller for efficiently finishing CBN grinding wheel - Google Patents
Preparation method of diamond roller for efficiently finishing CBN grinding wheel Download PDFInfo
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- CN112548881A CN112548881A CN202011411444.6A CN202011411444A CN112548881A CN 112548881 A CN112548881 A CN 112548881A CN 202011411444 A CN202011411444 A CN 202011411444A CN 112548881 A CN112548881 A CN 112548881A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
- B24D3/00—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents
- B24D3/02—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents the constituent being used as bonding agent
- B24D3/04—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents the constituent being used as bonding agent and being essentially inorganic
- B24D3/06—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents the constituent being used as bonding agent and being essentially inorganic metallic or mixture of metals with ceramic materials, e.g. hard metals, "cermets", cements
- B24D3/10—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents the constituent being used as bonding agent and being essentially inorganic metallic or mixture of metals with ceramic materials, e.g. hard metals, "cermets", cements for porous or cellular structure, e.g. for use with diamonds as abrasives
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B53/00—Devices or means for dressing or conditioning abrasive surfaces
- B24B53/06—Devices or means for dressing or conditioning abrasive surfaces of profiled abrasive wheels
- B24B53/062—Devices or means for dressing or conditioning abrasive surfaces of profiled abrasive wheels using rotary dressing tools
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B53/00—Devices or means for dressing or conditioning abrasive surfaces
- B24B53/12—Dressing tools; Holders therefor
- B24B53/14—Dressing tools equipped with rotary rollers or cutters; Holders therefor
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- 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
- B24D18/0009—Manufacture of grinding tools or other grinding devices, e.g. wheels, not otherwise provided for using moulds or presses
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- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
- B24D3/00—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents
- B24D3/34—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents characterised by additives enhancing special physical properties, e.g. wear resistance, electric conductivity, self-cleaning properties
- B24D3/346—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents characterised by additives enhancing special physical properties, e.g. wear resistance, electric conductivity, self-cleaning properties utilised during polishing, or grinding operation
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- Ceramic Engineering (AREA)
- Inorganic Chemistry (AREA)
- Polishing Bodies And Polishing Tools (AREA)
Abstract
The invention provides a method for preparing a diamond roller for efficiently finishing a CBN grinding wheel, which comprises the following steps: s1: putting diamond particles and copper-iron alloy powder into a micro-stirrer, stirring to obtain mixed powder, adding a lubricant into the mixed material, and continuously stirring to obtain a mixed material; s2: putting the mixed material into a graphite mold, pressing the mixed material into a metal sheet, putting the metal sheet into a medium-frequency sintering machine for sintering, and cooling to obtain a diamond alloy sheet; s3: processing a roller substrate, putting the diamond alloy sheet into a high-frequency heating machine for heating, taking out the diamond alloy sheet, quickly sleeving the diamond alloy sheet on the roller substrate, and cooling to obtain a diamond roller; s4: and (5) polishing the diamond roller obtained in the step (S3), then performing dynamic balance, cleaning, drying, spraying antirust oil, packaging and storing. In a word, the invention has the advantages of novel method, convenient operation, low cost, long service life of products and the like.
Description
Technical Field
The invention belongs to the technical field of new material preparation, and particularly relates to a method for preparing a diamond roller for efficiently finishing a CBN grinding wheel.
Background
The diamond roller is a new generation of grinding wheel dressing tool and has the characteristics of high precision and high forming. The numerical control forming grinding technology is a novel processing technology which is rapidly developed at home and abroad in recent years, and the efficient and precise processing mode of the numerical control forming grinding technology is widely applied to mechanical engineering. The grinding wheel dressing method is based on the extremely large and wide application prospect of the grinding technology and is provided under the background that the existing grinding wheel dressing technology has certain limitations.
The working principle of the diamond roller is as follows: the diamond roller wheel is arranged on a trimming device of a grinding machine, a common ceramic grinding wheel or a CBN grinding wheel is trimmed by the diamond roller wheel, and a part is ground after the grinding wheel is formed, so that the contour, the precision and the size of the diamond roller wheel are copied to the surface of the processed part through the grinding wheel. The grinding machine has the characteristics that the machine tool is simple to operate, the technical requirement on operators is not high, the processed products are good in precision consistency and stable in quality, the production efficiency and the product quality can be obviously improved, the manufacturing cost is reduced, and the grinding machining automation is easy to realize. Compared with the traditional single-point diamond pen finishing, the production efficiency is greatly improved, the surface quality and the precision of the processed parts are higher, and the method is particularly suitable for high-precision and mass production.
The current factory development is towards pursuing productivity and quality, high accuracy, the manpower is saved, reduce the technological threshold to the operation workman, remove the direction development of loaded down with trivial details operation in the middle, just can not use former technology single point diamond dresser to CBN emery wheel finishing here, because the uniformity of dressing is poor, the angle of dressing is adjusted repeatedly, because the diamond is only one usually, so wearing and tearing are fast, the uniformity is poor, the high accuracy that can not satisfy special requirement, still change frequently, take a lot of trouble and laboursome, the defective percentage is high. The invention provides a set of solution for CBN grinding wheel dressing.
Disclosure of Invention
Aiming at the existing problems, the invention provides a method for preparing a diamond roller for efficiently finishing a CBN grinding wheel.
The technical scheme of the invention is as follows: a preparation method of a diamond roller for efficiently finishing a CBN grinding wheel mainly comprises the following steps:
s1: preparation of the starting materials
Taking diamond particles and copper-iron alloy powder with the total mass of 57 +/-0.5 g, wherein the mass ratio of the diamond particles to the copper-iron alloy powder is 13-17:37, putting the diamond particles and the copper-iron alloy powder into a micro stirrer, stirring for 10-20min to obtain mixed powder, then adding 2-3g of lubricant into the mixed material, continuously stirring for 1-2h to obtain mixed material, filling the mixed material into a sealing bag, vacuumizing the sealing bag to 5-8Pa, and storing for later use;
s2: preparation of alloy sheet
Taking out the mixed material obtained in the step S1 from the sealing bag, putting the sealed bag into a graphite mold, pressing the mixed material into a metal sheet with the thickness of 1mm by using a bench hydraulic press, putting the metal sheet and the graphite mold into a medium-frequency sintering machine together, sintering the metal sheet by keeping the argon atmosphere in the medium-frequency sintering machine, closing the medium-frequency sintering furnace, naturally cooling to room temperature, and taking out the graphite mold to obtain a diamond alloy sheet;
s3: roller preparation
Processing a roller substrate with the outer diameter 0.05mm larger than the inner diameter of the diamond alloy sheet according to a drawing, putting the diamond alloy sheet obtained in the step S2 into a high-frequency heating machine, heating to 200 +/-5 ℃, enlarging the inner diameter of the diamond alloy sheet by utilizing the principle of thermal expansion and cold contraction, taking out the diamond alloy sheet with the enlarged inner diameter by using tweezers, quickly sleeving the diamond alloy sheet on the roller substrate, and obtaining a diamond roller after the diamond alloy sheet is naturally cooled to the room temperature;
s4: packaging and preserving
And (4) polishing the outer edge and the end face of the diamond roller obtained in the step (S3) by using a grinder, then moving the diamond roller to a dynamic balance machine for dynamic balance, cleaning and drying the diamond roller after dynamic balance, spraying antirust oil, and then packaging and storing.
Preferably, in S1, the diamond particles are natural diamond or artificial diamond with 30-80 particles/cm 2, and the base diamond with proper particle size can meet the grinding requirement and reduce the preparation cost.
Preferably, in S1, the copper-iron alloy powder has a copper-iron mass percentage of 3:7, and the copper-iron alloy is firmly bonded to the diamond at this ratio.
Preferably, in S1, the lubricant is epoxy resin loaded with metallic cobalt, and a trace amount of metallic cobalt can improve the wear resistance of the diamond roller.
Further, in S1, the total mass of the diamond particles and the copper-iron alloy powder is calculated by combining a volume formula and a mass formula, where the volume formula is: the mass formula is m ═ ρ V ═ 9.5 × 5.966 ═ 56.677g, and diamond particles and copper-iron alloy powder with a total mass of 57 ± 0.5g are taken in consideration of inevitable errors and losses in weighing and manufacturing processes, where V ═ π (r12-r22) × h ═ 3.14(102-92) × 0.1 ═ 5.966cm 2.
Preferably, in S2, the bench press has a pressing pressure of 600 ± 50mPa, so that the density of the diamond alloy sheet obtained by pressing is uniform.
Further, in S2, the specific process of sintering the metal sheet is as follows: uniformly heating the medium frequency sintering machine to 300 +/-10 ℃ within 1min at the heating rate of 5 ℃/s, preserving heat for 5-7min, continuously blowing argon into the medium frequency sintering machine in the heat preservation process, then sealing the medium frequency sintering furnace, heating the medium frequency sintering furnace to 900 +/-5 ℃ within 1min at the heating rate of 10 ℃/s, preserving heat for 10-20min, discharging air and lubricant in the metal sheet in the low temperature process, and obtaining the diamond alloy sheet in the high temperature process through high temperature and high pressure.
Further, in S2, the obtained diamond alloy piece had an outer diameter of 100mm, an inner diameter of 90mm and a thickness of 1 mm.
Preferably, in S3, the roller base body is made of a non-carbon steel, and the roller base body has a thickness of 10mm, and the non-carbon steel has a stable structure and is heat-resistant and wear-resistant.
Further, in S4, the spraying of the anti-rust oil is to uniformly spray the anti-rust oil on the surface of the diamond roller and the inner surface of the package, and the spraying of the anti-rust oil on the inner surface of the package can prevent the package from absorbing the anti-rust oil sprayed on the diamond roller, which causes rusting of the diamond roller.
The invention has the beneficial effects that: the invention provides a method for preparing a diamond roller for efficiently finishing a CBN grinding wheel, which solves the problem that the diamond roller for finishing the CBN grinding wheel cannot meet the requirements of roughness and precision. In a word, the invention has the advantages of novel method, convenient operation, low cost, long service life of products and the like.
Drawings
FIG. 1 is a schematic view of a cross-sectional circular structure of a diamond roller according to the present invention;
FIG. 2 is a schematic view of a rectangular cross-sectional structure of a diamond roller according to the present invention.
Detailed Description
For the understanding of the technical solutions of the present invention, the following description is further illustrated with reference to fig. 1-2 and specific examples, which are not intended to limit the scope of the present invention.
Example 1: a preparation method of a diamond roller for efficiently finishing a CBN grinding wheel mainly comprises the following steps:
s1: preparation of the starting materials
Taking diamond particles and copper-iron alloy powder with the total mass of 56.5g, wherein the mass ratio of the diamond particles to the copper-iron alloy powder is 13:37, and the diamond particles are selected to be 30 particles/cm2The natural diamond or the artificial diamond is prepared by placing diamond particles and copper-iron alloy powder into a micro-mixer, stirring for 10min to obtain mixed powder, adding 2g of a lubricant into the mixed material, continuously stirring for 1h to obtain the mixed material, filling the mixed material into a sealing bag, vacuumizing the sealing bag to 5Pa, and storing for later use,
the total mass of the diamond particles and the copper-iron alloy powder is obtained by joint calculation through a volume formula and a mass formula, wherein the volume formula is as follows: v ═ pi (r 1)2-r22)×h＝3.14(102-92)×0.1＝5.966cm2Taking diamond particles and copper-iron alloy powder with the total mass of 56.5g in consideration of inevitable errors and loss in the weighing and preparation processes, wherein the mass formula is that m is rho V is 9.5 multiplied by 5.966 is 56.677 g;
s2: preparation of alloy sheet
Taking out the mixed material obtained in the step S1 from the sealing bag, placing the sealed bag into a graphite mold, pressing the mixed material into a metal sheet with the thickness of 1mm by using a bench hydraulic press, setting the pressing pressure of the bench hydraulic press to be 550mPa, placing the metal sheet and the graphite mold into a medium-frequency sintering machine, sintering the metal sheet by keeping the argon atmosphere in the medium-frequency sintering machine, closing the medium-frequency sintering furnace, naturally cooling to room temperature, taking out the graphite mold to obtain a diamond alloy sheet, wherein the obtained diamond alloy sheet has the outer diameter of 100mm, the inner diameter of 90mm and the thickness of 1mm, and is shown in a figure 1-2,
the specific process for sintering the metal sheet comprises the following steps: uniformly heating the medium-frequency sintering machine to 300 ℃ within 1min at a heating rate of 5 ℃/s, preserving heat for 5min, continuously blowing argon into the medium-frequency sintering machine in the heat preservation process, then sealing the medium-frequency sintering furnace, heating the medium-frequency sintering furnace to 900 ℃ within 1min at the heating rate of 10 ℃/s, and preserving heat for 10 min;
s3: roller preparation
Processing a roller substrate with the outer diameter 0.05mm larger than the inner diameter of the diamond alloy sheet according to a drawing, wherein the roller substrate adopts carbon-free steel as a raw material, the thickness of the roller substrate is 10mm, the diamond alloy sheet obtained in the step S2 is placed into a high-frequency heating machine to be heated to 195 ℃, the inner diameter of the diamond alloy sheet is enlarged by utilizing the principle of thermal expansion and cold contraction, then the diamond alloy sheet with the enlarged inner diameter is taken out by using tweezers and is quickly sleeved on the roller substrate, and the diamond alloy sheet is naturally cooled to the room temperature to obtain a diamond roller;
s4: packaging and preserving
And (4) polishing the outer edge and the end face of the diamond roller obtained in the step (S3) by using a grinder, then loading a dynamic balancer for dynamic balancing, cleaning and drying the diamond roller after dynamic balancing, and spraying antirust oil for packaging and storing, wherein the step of spraying antirust oil is to uniformly spray antirust oil on the surface of the diamond roller and the inner surface of the package.
Example 2: a preparation method of a diamond roller for efficiently finishing a CBN grinding wheel mainly comprises the following steps:
s1: preparation of the starting materials
Taking diamond particles and copper-iron alloy powder with the total mass of 57g, wherein the mass ratio of the diamond particles to the copper-iron alloy powder is 15:37, and the diamond particles are 55 particles/cm2The natural diamond or the artificial diamond is characterized in that the mass percentage of copper to iron in the copper-iron alloy powder is 3:7, diamond particles and the copper-iron alloy powder are placed into a micro-mixer to be mixed for 15min to obtain mixed powder, then 2.5g of lubricant is added into the mixed material, the lubricant is epoxy resin loaded with metal cobalt, the mixture is continuously stirred for 1.5h to obtain mixed material, the mixed material is placed into a sealing bag, the sealing bag is vacuumized to 6.5Pa to be stored for later use,
the total mass of the diamond particles and the copper-iron alloy powder is obtained by joint calculation through a volume formula and a mass formula, wherein the volume formula is as follows: v ═ pi (r 1)2-r22)×h＝3.14(102-92)×0.1＝5.966cm2Taking diamond particles and copper-iron alloy powder with the total mass of 57g by considering the inevitable errors and losses in the weighing and preparation processes, wherein the mass formula is that m is rho V is 9.5 multiplied by 5.966 is 56.677 g;
s2: preparation of alloy sheet
Taking out the mixed material obtained in the step S1 from the sealing bag, putting the sealed bag into a graphite mold, pressing the mixed material into a metal sheet with the thickness of 1mm by using a bench hydraulic press, setting the pressing pressure of the bench hydraulic press to 600mPa, putting the metal sheet and the graphite mold into a medium-frequency sintering machine, sintering the metal sheet by keeping the argon atmosphere in the medium-frequency sintering machine, closing the medium-frequency sintering furnace, naturally cooling to room temperature, taking out the graphite mold to obtain a diamond alloy sheet, wherein the outer diameter of the obtained diamond alloy sheet is 100mm, the inner diameter of the obtained diamond alloy sheet is 90mm, and the thickness of the obtained diamond alloy,
the specific process for sintering the metal sheet comprises the following steps: uniformly heating the medium-frequency sintering machine to 300 ℃ within 1min at a heating rate of 5 ℃/s, preserving heat for 6min, continuously blowing argon into the medium-frequency sintering machine in the heat preservation process, then sealing the medium-frequency sintering furnace, heating the medium-frequency sintering furnace to 900 ℃ within 1min at a heating rate of 10 ℃/s, and preserving heat for 15 min;
s3: roller preparation
Processing a roller substrate with the outer diameter 0.05mm larger than the inner diameter of the diamond alloy sheet according to a drawing, wherein the roller substrate adopts carbon-free steel as a raw material, the thickness of the roller substrate is 10mm, the diamond alloy sheet obtained in the step S2 is placed into a high-frequency heating machine to be heated to 200 ℃, the inner diameter of the diamond alloy sheet is enlarged by utilizing the principle of thermal expansion and cold contraction, then the diamond alloy sheet with the enlarged inner diameter is taken out by using tweezers and is quickly sleeved on the roller substrate, and the diamond alloy sheet is naturally cooled to the room temperature to obtain a diamond roller;
s4: packaging and preserving
And (4) polishing the outer edge and the end face of the diamond roller obtained in the step (S3) by using a grinder, then loading a dynamic balancer for dynamic balancing, cleaning and drying the diamond roller after dynamic balancing, and spraying antirust oil for packaging and storing, wherein the step of spraying antirust oil is to uniformly spray antirust oil on the surface of the diamond roller and the inner surface of the package.
Example 3: a preparation method of a diamond roller for efficiently finishing a CBN grinding wheel mainly comprises the following steps:
s1: preparation of the starting materials
Taking diamond particles and copper-iron alloy powder with the total mass of 57.5g, wherein the mass ratio of the diamond particles to the copper-iron alloy powder is 17:37, and the diamond particles are 80 particles/cm2The natural diamond or the artificial diamond is prepared by placing diamond particles and copper-iron alloy powder into a micro-mixer, stirring for 20min to obtain mixed powder, adding 3g of a lubricant into the mixed material, continuously stirring for 2h to obtain the mixed material, filling the mixed material into a sealing bag, vacuumizing the sealing bag to 8Pa, and storing for later use,
the total mass of the diamond particles and the copper-iron alloy powder is obtained by joint calculation through a volume formula and a mass formula, wherein the volume formula is as follows: v ═ pi (r 1)2-r22)×h＝3.14(102-92)×0.1＝5.966cm2Taking diamond particles and copper-iron alloy powder with the total mass of 57.5g by considering inevitable errors and losses in the weighing and preparing processes, wherein the mass formula is that m is rho V is 9.5 multiplied by 5.966 is 56.677 g;
s2: preparation of alloy sheet
Taking out the mixed material obtained in the step S1 from the sealing bag, putting the sealed bag into a graphite mold, pressing the mixed material into a metal sheet with the thickness of 1mm by using a bench hydraulic press, setting the pressing pressure of the bench hydraulic press to be 650mPa, putting the metal sheet and the graphite mold into a medium-frequency sintering machine together, sintering the metal sheet in the medium-frequency sintering machine by keeping the argon atmosphere, closing the medium-frequency sintering furnace, naturally cooling to room temperature, taking out the graphite mold to obtain a diamond alloy sheet, wherein the outer diameter of the obtained diamond alloy sheet is 100mm, the inner diameter of the obtained diamond alloy sheet is 90mm, and the thickness of the obtained,
the specific process for sintering the metal sheet comprises the following steps: uniformly heating the medium-frequency sintering machine to 300 ℃ within 1min at a heating rate of 5 ℃/s, preserving heat for 7min, continuously blowing argon into the medium-frequency sintering machine in the heat preservation process, then sealing the medium-frequency sintering furnace, heating the medium-frequency sintering furnace to 900 ℃ within 1min at the heating rate of 10 ℃/s, and preserving heat for 20 min;
s3: roller preparation
Processing a roller substrate with the outer diameter 0.05mm larger than the inner diameter of the diamond alloy sheet according to a drawing, wherein the roller substrate adopts carbon-free steel as a raw material, the thickness of the roller substrate is 10mm, the diamond alloy sheet obtained in the step S2 is placed into a high-frequency heating machine to be heated to 205 ℃, the inner diameter of the diamond alloy sheet is enlarged by utilizing the principle of thermal expansion and cold contraction, then the diamond alloy sheet with the enlarged inner diameter is taken out by using tweezers and is quickly sleeved on the roller substrate, and the diamond alloy sheet is naturally cooled to the room temperature to obtain a diamond roller;
s4: packaging and preserving
And (4) polishing the outer edge and the end face of the diamond roller obtained in the step (S3) by using a grinder, then loading a dynamic balancer for dynamic balancing, cleaning and drying the diamond roller after dynamic balancing, and spraying antirust oil for packaging and storing, wherein the step of spraying antirust oil is to uniformly spray antirust oil on the surface of the diamond roller and the inner surface of the package.
Example 4: the same as example 1 except that: the lubricant is epoxy resin.
Example 5: the same as example 1 except that:
s2: preparation of alloy sheet
The specific process for sintering the metal sheet comprises the following steps: and uniformly heating the medium-frequency sintering machine to 900 ℃ within 1min at the heating rate of 15 ℃/s, and preserving the heat for 20 min.
Experimental example 1: research on influence of metal cobalt on wear resistance of diamond roller
The diamond rollers prepared by the preparation methods provided in examples 1 and 4 were used to trim CBN grinding wheels having the same parameters, and the maximum correction times were recorded, respectively, as shown in table 1:
table 1 maximum dressing times of diamond rollers prepared in examples 1 and 4
And (4) conclusion: the cobalt can be combined with the crystal grains in the copper-iron alloy, so that the copper-iron alloy has higher toughness, the sensitivity to impact is reduced, and the service life of the diamond roller is greatly prolonged.
Experimental example 2: research on influence of different sintering processes on performance of diamond roller
The same metal sheet was sintered by the sintering processes of examples 1 and 5, respectively, and diamond rollers were prepared by using the sintered diamond alloy sheets, and the performance parameters of the diamond rollers were measured, respectively, and the results are shown in table 2:
TABLE 2 calibration table for diamond roller performance obtained by different sintering processes
And (4) conclusion: the gradient sintering method can slowly discharge the air and the lubricant in the metal sheet, and the direct high-temperature sintering can cause the air and the lubricant in the metal sheet to be too late to discharge, thereby greatly influencing the density, the precision and the wear resistance of the product.
Claims (10)
1. A preparation method of a diamond roller for efficiently finishing a CBN grinding wheel is characterized by mainly comprising the following steps:
s1: preparation of the starting materials
Taking diamond particles and copper-iron alloy powder with the total mass of 57 +/-0.5 g, wherein the mass ratio of the diamond particles to the copper-iron alloy powder is 13-17:37, putting the diamond particles and the copper-iron alloy powder into a micro stirrer, stirring for 10-20min to obtain mixed powder, then adding 2-3g of lubricant into the mixed material, continuously stirring for 1-2h to obtain mixed material, filling the mixed material into a sealing bag, vacuumizing the sealing bag to 5-8Pa, and storing for later use;
s2: preparation of alloy sheet
Taking out the mixed material obtained in the step S1 from the sealing bag, putting the sealed bag into a graphite mold, pressing the mixed material into a metal sheet with the thickness of 1mm by using a bench hydraulic press, putting the metal sheet and the graphite mold into a medium-frequency sintering machine together, sintering the metal sheet by keeping the argon atmosphere in the medium-frequency sintering machine, closing the medium-frequency sintering furnace, naturally cooling to room temperature, and taking out the graphite mold to obtain a diamond alloy sheet;
s3: roller preparation
Processing a roller substrate with the outer diameter 0.05mm larger than the inner diameter of the diamond alloy sheet according to a drawing, putting the diamond alloy sheet obtained in the step S2 into a high-frequency heating machine, heating to 200 +/-5 ℃, enlarging the inner diameter of the diamond alloy sheet by utilizing the principle of thermal expansion and cold contraction, taking out the diamond alloy sheet with the enlarged inner diameter by using tweezers, quickly sleeving the diamond alloy sheet on the roller substrate, and obtaining a diamond roller after the diamond alloy sheet is naturally cooled to the room temperature;
s4: packaging and preserving
And (4) polishing the outer edge and the end face of the diamond roller obtained in the step (S3) by using a grinder, then moving the diamond roller to a dynamic balance machine for dynamic balance, cleaning and drying the diamond roller after dynamic balance, spraying antirust oil, and then packaging and storing.
2. The method for manufacturing a diamond roller for dressing a CBN grinding wheel with high efficiency as claimed in claim 1, wherein in S1, the diamond particles are selected from 30-80 particles/cm2Natural diamond or artificial diamond.
3. The method for preparing the diamond roller for dressing the CBN grinding wheel with high efficiency as claimed in claim 1, wherein in S1, the mass percentage of copper to iron in the copper-iron alloy powder is 3: 7.
4. The method for manufacturing a diamond roller for dressing a CBN grinding wheel with high efficiency as claimed in claim 1, wherein in S1, the lubricant is epoxy resin loaded with 0.1-0.2g metallic cobalt.
5. The method for manufacturing a diamond roller for dressing a CBN grinding wheel with high efficiency as claimed in claim 1, wherein in S2, the pressing pressure of the bench hydraulic press is 600 ± 50 mPa.
6. The method for preparing the diamond roller for efficiently dressing the CBN grinding wheel according to the claim 1, wherein in the step S2, the specific process for sintering the metal sheet comprises the following steps: uniformly heating the medium-frequency sintering machine to 300 +/-10 ℃ within 1min at the heating rate of 5 ℃/s, preserving heat for 5-7min, continuously blowing argon into the medium-frequency sintering machine in the heat preservation process, then sealing the medium-frequency sintering furnace, heating the medium-frequency sintering furnace to 900 +/-5 ℃ within 1min at the heating rate of 10 ℃/s, and preserving heat for 10-20 min.
7. The method for manufacturing a diamond roller for dressing a CBN grinding wheel with high efficiency as claimed in claim 1, wherein in S2, the obtained diamond alloy sheet has an outer diameter of 100mm, an inner diameter of 90mm and a thickness of 1 mm.
8. The method for preparing a diamond roller for dressing a CBN grinding wheel with high efficiency as claimed in claim 1, wherein in S3, the roller substrate is made of carbon-free steel and has a thickness of 10 mm.
9. The method for manufacturing a diamond roller for dressing a CBN grinding wheel with high efficiency as claimed in claim 1, wherein in S3, the thickness of the roller base is 10 mm.
10. The method for manufacturing a diamond roller for dressing a CBN grinding wheel with high efficiency as claimed in claim 1, wherein in S4, the spraying of the anti-rust oil is performed by uniformly spraying the anti-rust oil on the surface of the diamond roller and the inner surface of the package.
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| CN114083450A (en) * | 2021-12-09 | 2022-02-25 | 郑州磨料磨具磨削研究所有限公司 | Superhard material grinding tool dressing tool and preparation method and dressing method thereof |
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