CN112138835B - Shaping method of cubic boron nitride and application thereof - Google Patents
Shaping method of cubic boron nitride and application thereof Download PDFInfo
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- CN112138835B CN112138835B CN202010910331.4A CN202010910331A CN112138835B CN 112138835 B CN112138835 B CN 112138835B CN 202010910331 A CN202010910331 A CN 202010910331A CN 112138835 B CN112138835 B CN 112138835B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C21/00—Disintegrating plant with or without drying of the material
- B02C21/007—Disintegrating plant with or without drying of the material using a combination of two or more drum or tube mills
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
- B02C23/08—Separating or sorting of material, associated with crushing or disintegrating
- B02C23/10—Separating or sorting of material, associated with crushing or disintegrating with separator arranged in discharge path of crushing or disintegrating zone
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
- B02C23/18—Adding fluid, other than for crushing or disintegrating by fluid energy
- B02C23/36—Adding fluid, other than for crushing or disintegrating by fluid energy the crushing or disintegrating zone being submerged in liquid
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Abstract
The invention relates to the technical field of superhard material shaping treatment, and particularly discloses a shaping method of cubic boron nitride and application thereof.
Description
Technical Field
The invention relates to the technical field of superhard material shaping treatment, in particular to a shaping method of cubic boron nitride and application thereof.
Background
The cubic boron nitride has high hardness and good wear resistance, has wide application in the mechanical processing industry, can be used for producing cubic boron nitride grinding tools, and has important significance for the grinding processing technology.
In general, the product with certain granularity of the cubic boron nitride variety is sufficient in stock or not needed in the market, the product with certain granularity is processed for the second time, and the product with certain granularity is processed into the required product granularity (namely, the target granularity is generally finer than the original granularity by one or a plurality of granularity numbers) by a shaping method, so as to obtain the cubic boron nitride finished product with the target granularity, and the product with the original certain granularity is called a return abrasive. The current cubic boron nitride abrasive is mainly processed by a self-made rotary shaping device (usually dry grinding) to obtain a cubic boron nitride finished product with target granularity, specifically, ball-milling a ball-milling tank is filled with steel balls with a certain proportion, dry grinding is carried out according to a certain ball-material ratio (generally 5000-7000 ct/time (carat/time) of each ball-milling tank), the ball-milled material is put into a proper sieve, then the sieve is put into a sieving machine to sieve out the required cubic boron nitride product granularity, and the unnecessary coarse granularity product is put into the ball-milling tank again to continue shaping, and the operation is repeated; and then the cubic boron nitride product is treated cleanly by chemical methods such as acid, alkali and the like. The method has the advantages of simple operation and good product equal-product shape (bulk density).
However, the above technical solutions have the following disadvantages in practical use: the existing cubic boron nitride product has the problems of large dust, more manpower consumption, low success rate of target granularity products, less one-time feeding and the like when being processed back to the abrasive by a shaping method, so that the labor efficiency is reduced, the labor intensity is increased, the equal-product shape can not be freely mastered according to the requirements of customers, and the industrial production is not facilitated. Therefore, a new shaping method of cubic boron nitride is needed to improve the labor efficiency and reduce the labor intensity.
Disclosure of Invention
The embodiment of the invention aims to provide a shaping method of cubic boron nitride, which aims to solve the problems that the labor efficiency is low and the labor intensity is increased when the conventional cubic boron nitride product is processed into abrasive materials by the shaping method in the prior art.
In order to achieve the above object, the embodiment of the present invention provides the following technical solutions:
the shaping method of the cubic boron nitride comprises the operations of dry grinding and wet grinding, and specifically comprises the following steps of:
1) Dry grinding: adding cubic boron nitride which is required to be processed into target granularity into a dry ball milling device which is pre-added with steel balls as a return grinding material to carry out dry milling to obtain dry milling materials, and leading a discharge hole of the dry ball milling device to be communicated with a rotary vibration screening device so as to input the dry milling materials into the rotary vibration screening device after the dry milling, wherein the size of the return grinding material granularity in the dry milling is larger than the target granularity (generally, the size of the return grinding material granularity in the dry milling is larger than the target granularity by one granularity number, and specifically, the granularity of the cubic boron nitride which is required to be processed into the target granularity is respectively from coarse to fine and is 50-60 meshes, 60-70 meshes, 70-80 meshes, 80-100 meshes, 100-120 meshes, 120-140 meshes, 140-170 meshes, 170-200 meshes, 200-230 meshes, 230-270 meshes, 270-325 meshes and 325-400 meshes, and the corresponding granularity of the cubic boron nitride which is required to be processed into the target granularity is 50-60 meshes, and the target granularity which is 60-70 meshes;
2) Wet milling: in the dry grinding process, adding the obtained dry grinding material input into the rotary vibration screening device into a wet grinding device, adding water for wet grinding to obtain a cubic boron nitride finished product with target granularity, wherein the adding amount of the water is 0.1-5 times of the weight of the reclaimed abrasive.
Another object of the embodiment of the present invention is to provide a cubic boron nitride finished product with a target particle size prepared by the shaping method of cubic boron nitride.
It is another object of an embodiment of the present invention to provide an application of the above-mentioned cubic boron nitride product having a target particle size as cubic boron nitride abrasive grains in grinding tool processing.
Another object of the embodiment of the present invention is to provide an application of the method for shaping cubic boron nitride in abrasive processing for grinding tools.
Compared with the prior art, the invention has the beneficial effects that:
the shaping method of the cubic boron nitride provided by the embodiment of the invention comprises dry grinding and wet grinding, the labor efficiency can be improved, the yield of target granularity can be improved, the equal product shape can be freely mastered, the labor intensity is reduced, the dust is reduced, the environment is optimized, the industrial production is facilitated, the production cost is obviously reduced, the problems that the labor efficiency is low and the labor intensity is increased when the conventional cubic boron nitride product is processed into abrasive materials by the shaping method are solved, and the method has wide market prospect.
Detailed Description
The present invention will be described in further detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the present invention, but are not intended to limit the invention in any way. It should be noted that variations and modifications could be made by those skilled in the art without departing from the inventive concept. These are all within the scope of the present invention. The invention is only a brand new shaping method of cubic boron nitride, and part of the content adopts standard equipment or the prior art, namely, the parts which are not involved in the invention can be realized by adopting the prior art, and the description is omitted here.
The shaping method of the cubic boron nitride provided by the embodiment of the invention comprises the operations of dry grinding and wet grinding, and specifically comprises the following steps:
1) Dry grinding: adding cubic boron nitride which needs to be processed into target granularity as a return grinding material into a dry ball milling device which is pre-added with steel balls for dry milling to obtain dry milling materials, wherein a discharge port of the dry ball milling device is communicated with a rotary vibration screening device so as to input the dry milling materials into the rotary vibration screening device after dry milling, and the size of the return grinding material in the dry milling is larger than that of the target granularity;
2) Wet milling: in the dry grinding process, adding the obtained dry grinding material input into the rotary vibration screening device into a wet grinding device, and adding water for wet grinding to obtain a cubic boron nitride finished product with target granularity.
As another preferred embodiment of the present invention, in the shaping method of cubic boron nitride, the size of the abrasive grain size of the return abrasive in the dry grinding is larger than the target grain size (generally, the abrasive grain size of the return abrasive in the dry grinding is larger than the target grain size by one grain size number, that is, the dry grinding procedure is only suitable for the case that the abrasive grain size of the return abrasive grain is larger than the target grain size by one grain size number, specifically, the grain size of the cubic boron nitride product which needs to be processed into the target grain size is from coarse to fine and is respectively 50-60 mesh, 60-70 mesh, 70-80 mesh, 80-100 mesh, 100-120 mesh, 120-140 mesh, 140-170 mesh, 170-200 mesh, 200-230 mesh, 230-270 mesh, 270-325 mesh and 325 mesh, and the corresponding grain size of the cubic boron nitride product which needs to be processed into the target grain size is 50-60 mesh and the target grain size which is 60-70 mesh.
As another preferred embodiment of the present invention, the target particle size is 50-400 mesh.
The invention preferably, the gear of the feed inlet and the discharge outlet of the dry ball milling device in the dry mill has three gears of high, medium and low, the feed inlet and the discharge outlet with the granularity of the abrasive product of 80-100 meshes are respectively high-gear (5 minutes are required for 5 ten thousand ct materials in a hopper to enter the dry ball milling device (particularly a ball mill) completely, 15 minutes are required for the materials in the ball mill to enter the rotary vibration screening device (particularly a rotary vibration screen) completely from the discharge outlet with the high-gear, thus the materials are fed in and discharged simultaneously, the ball mill vibrates by steel ball friction, the edges and corners of the materials and burrs are worn, a part of granularity of the abrasive product is finer by one granularity number, and the materials directly enter the rotary vibration screen from the ball mill), and the time of the rotary vibration screen is set to be 20 minutes; the granularity of 100-120 meshes to 140-170 meshes is selected as a middle gear (the blanking time is 8 minutes, the discharging time is 20 minutes), and the time of the rotary vibrating screen is set to be 30 minutes; the low gear is selected for the fine granularity of 170-200 meshes (15 minutes is needed for discharging time and 30 minutes is needed for discharging time), and the time of the rotary vibration sieve is set to be 50 minutes.
In another preferred embodiment of the present invention, in the shaping method of cubic boron nitride, the addition amount of the water is 0.1-5 times of the weight of the recycled abrasive, preferably, the recycled abrasive is added according to 5 ten thousand ct/time, the corresponding wet grinding can throw 8 ten thousand ct of material at a time, and the addition amount of the water is 8 ten thousand ct/time.
As another preferred embodiment of the present invention, in the shaping method of cubic boron nitride, when water is added to perform wet milling, the rotational speed of the wet milling is 20-95r/min, and the time is 20-90min.
Specifically, the wet grinding process is as follows:
1) The granularity of the cubic boron nitride abrasive is larger than the target granularity by one granularity number by adopting the process:
rotational speed: 20-30r/min, and 20-30min.
2) The cubic boron nitride abrasive grain size is larger than the target grain size by two grain size numbers by adopting the process:
rotational speed: 30-45r/min for 30-40min.
3) The cubic boron nitride abrasive grain size is three grain sizes larger than the target grain size by adopting the process:
rotational speed: 30-60r/min for 40-65min.
4) The cubic boron nitride abrasive grain size is four grain sizes larger than the target grain size by adopting the process:
rotational speed: 60-85r/min for 50-70min.
5) The cubic boron nitride abrasive grain size is five grain sizes larger than the target grain size by adopting the process:
rotational speed: 70-95r/min, and 70-90min.
As another preferred embodiment of the present invention, in the shaping method of cubic boron nitride, the dry ball milling device may be a vibration ball mill, the rotary vibration screening device may be a rotary vibration screen, and the wet milling device may be a wet mill; the screen mesh of the rotary vibration screening device comprises two layers of screen meshes which are sequentially arranged, each layer of screen mesh is provided with a discharge port, one discharge port is used for outputting dry-grinding materials, the other discharge port is used for outputting materials with the granularity not larger than the target granularity, and specifically, the materials (the granularity) of the first layer of discharge port need to be subjected to wet grinding; the second layer is a discharge port with target granularity (namely the granularity of the required product) and fine granularity, and the second layer needs to be transferred to the next process for purification. And after the rotary vibration screening device stops, opening a baffle of a discharge hole, and then opening a switch of the rotary vibration screening device to discharge materials (until the discharge hole is not discharged).
Further preferably, the shaping method of the cubic boron nitride specifically includes the following steps:
1) Dry grinding: adding cubic boron nitride which needs to be processed into target granularity as a return grinding material into a dry ball milling device which is pre-added with steel balls for dry milling to obtain dry milling materials, wherein a discharge port of the dry ball milling device is communicated with a rotary vibration screening device so as to input the dry milling materials into the rotary vibration screening device after dry milling, and the size of the return grinding material in the dry milling is larger than that of the target granularity; the method comprises the steps of preparing steel balls with different sizes according to a proportion, pouring the steel balls into a ball mill, preparing a receiving barrel at each discharge port, pouring cubic boron nitride which needs to be processed into target granularity as a grinding material into a hopper of a self-made ball mill (5 ten thousand ct/time), adjusting the sizes of the feed port and the discharge port of the ball mill, setting the rotary vibration screening time, and sequentially opening a switch of the ball mill, a rotary vibration screening switch and an ultrasonic switch (the grinding material enters the ball mill from the hopper);
2) Wet milling: in the dry grinding process, the obtained dry grinding materials input into the rotary vibration screening device are subjected to wet grinding, specifically, steel balls with different proportions according to the operation process are poured into a wet grinding machine, the weighed dry grinding materials are poured into the wet grinding machine and added with water to a specified water level (8 ten thousand ct/time), the process is set according to the requirement, a switch of the wet grinding machine is opened for ball milling, and then the materials are discharged, so that the cubic boron nitride finished product with the target granularity is obtained.
The shaping method of the cubic boron nitride provided by the embodiment of the invention comprises dry grinding and wet grinding, and through the dry-wet mixing shaping method, the labor efficiency can be improved, the yield of target granularity can be improved, the equal product shape can be freely mastered, the labor intensity is reduced, the dust is reduced, the environment is optimized, the industrial production is facilitated, and the production cost is remarkably reduced.
The embodiment of the invention also provides a cubic boron nitride finished product with target granularity, which is prepared by adopting the shaping method of the cubic boron nitride.
The embodiment of the invention also provides an application of the cubic boron nitride finished product with the target granularity as the cubic boron nitride abrasive particle in grinding tool processing.
As another preferred embodiment of the present invention, in the case where a finished cubic boron nitride product having a target grain size is obtained as cubic boron nitride abrasive grains by the above-described method, the cubic boron nitride abrasive grains can be used for producing cubic boron nitride abrasive tools such as wire saw and the like.
The embodiment of the invention also provides an application of the shaping method of the cubic boron nitride in abrasive machining for grinding tools.
The technical effects of the shaping method of cubic boron nitride according to the present invention will be further described below by way of specific examples. The shaping method of cubic boron nitride provided by the invention can freely grasp the equal product shape (bulk density), and in the following embodiment, a product with the same granularity and high bulk density of the same product is called as a material A; the product with low bulk density is called as material B; when the customers do not require the crystal forms, the material is called as a material, and letters are not added after granularity so as to meet the requirements of the customers; it should be noted that the conventional shaping method produces more material a.
Example 1
A method of shaping cubic boron nitride comprising the steps of:
1) Dry grinding: taking a cubic boron nitride 282 variety (hereinafter referred to as CBN 282) which is required to be processed into target granularity as a grinding material (the shaping target granularity is 100-120 meshes and 120-140 meshes respectively), the granularity is 80-100 meshes, and the total granularity is 30 ten thousand ct, then adding the grinding material into a ball mill with steel balls added in advance for dry grinding to obtain a dry-grinding material, and communicating a discharge hole of the ball mill with a rotary vibrating screen so as to input the dry-grinding material into the rotary vibrating screen after dry grinding; the gear of the feed inlet and the discharge outlet of the ball mill in the dry grinding is provided with three gears of high, medium and low, the feed inlet and the discharge outlet are respectively provided with a high gear, the feeding time is 5 ten thousand ct/time, and the time of the rotary vibration sieve is set to be 20min;
2) Wet milling: in the dry grinding process, the obtained dry grinding material which is input into the rotary vibration sieve and is coarser than the target granularity is subjected to wet grinding, the rotating speed is 20-30r/min, and the time is 20-30min (the last tank is less than 8 ten thousand ct, and the time can be shortened according to the actual quantity in proportion); specifically, steel balls with different sizes are proportioned according to an operation process and poured into a wet mill, weighed dry-milled materials are poured into the wet mill and added with water to a specified water level (8 ten thousand ct/time of feeding), the process is set according to requirements, a switch of the wet mill is turned on for ball milling, and then the materials are discharged, so that a cubic boron nitride finished product with target granularity is obtained.
Example 2
A traditional shaping method of cubic boron nitride includes such steps as dry grinding the steel balls in ball-grinding tanks according to a certain ball-to-material ratio (5000-7000 ct/time for each ball-grinding tank), putting the ball-ground material in a proper sieve, sieving to obtain the required granularity of cubic boron nitride, putting the coarse granularity product in ball-grinding tank again, shaping, and repeating. The above operation was carried out under the same conditions as in example 1.
Example 3
The shaped products obtained in example 1 and example 2 were subjected to performance testing, and the specific results are shown in table 1. The specific detection method adopts GB/T33144-2016, GB/T6406-2016 and JB/T3584-2012. The basis criteria are: GB/T6408-2018 or enterprise standard Q/ZNJT01-2018.
Table 1 table of performance test results
As can be seen from the data in Table 1, the bulk density of the product obtained by the conventional method in this embodiment is not up to standard and the success rate is low. The method of example 1 of the present invention has high bulk density and high success rate.
Example 4
A method of shaping cubic boron nitride comprising the steps of:
1) Dry grinding: the method comprises the steps of taking a cubic boron nitride 120 variety (CBN 120 for short) which is required to be processed into target granularity as a grinding material (the shaping target granularity is 200-230 meshes (A material) respectively), taking the granularity as 120-140 meshes, adding the total granularity to 32 ten thousand ct, then adding the grinding material into a ball mill which is added with steel balls in advance for dry grinding to obtain a dry-grinding material, and communicating a discharge hole of the ball mill with a rotary vibrating screen so as to input the dry-grinding material into the rotary vibrating screen after dry grinding; the gear of the feed inlet and the discharge outlet of the ball mill in the dry grinding is provided with three gears of high, medium and low, the feed inlet and the discharge outlet are respectively provided with a high gear, the feeding time is 8 ten thousand ct/time, and the time of the rotary vibration sieve is set to be 20min;
2) Wet milling: in the dry grinding process, wet grinding is carried out on the obtained dry grinding material which is input into the rotary vibration sieve and is coarser than the target granularity, the rotating speed is 60r/min, and the time is 50min (the last tank is less than 8 ten thousand ct, and the time can be shortened according to the actual quantity in proportion); resetting the rotating speed after ball milling is finished: 30r/min for 15min (when the target granularity needs the material A, the process of each tank is carried out in two stages, wherein the first stage is a crushing process, and the second stage is a shaping process, namely two ball milling processes are needed, specifically one time with the rotating speed of 60r/min and the time of 50min, and one time with the rotating speed of 30r/min and the time of 15 min). After shaping, the mixed granularity product is turned out to be 31.2 ten thousand ct (with loss), and the cubic boron nitride finished product with the target granularity is obtained, wherein the successful material with the target granularity is 9.5 ten thousand ct, and the ratio is 30.4%.
Example 5
A traditional shaping method of cubic boron nitride includes such steps as dry grinding the steel balls in ball-grinding tanks according to a certain ball-to-material ratio (5000-7000 ct/time for each ball-grinding tank), putting the ball-ground material in a proper sieve, sieving to obtain the required granularity of cubic boron nitride, putting the coarse granularity product in ball-grinding tank again, shaping, and repeating. The above operation was carried out under the same conditions as in example 4.
Example 6
The shaped products obtained in example 4 and example 5 were subjected to performance testing, and the specific results are shown in table 2. The specific detection method adopts GB/T33144-2016, GB/T6406-2016 and JB/T3584-2012. The basis criteria are: GB/T6408-2018 or enterprise standard Q/ZNJT01-2018.
Table 2 table of performance test results
As can be seen from the data in table 2, the conventional method is extremely inefficient in this embodiment. And the efficiency of the method of example 3 of the present invention is high.
Example 7
A method of shaping cubic boron nitride comprising the steps of:
1) Dry grinding: taking a cubic boron nitride 120 variety (hereinafter referred to as CBN 120) which is required to be processed into target granularity as a grinding material (the shaping target granularity is 200-230 meshes (B material) respectively), the granularity is 140-170 meshes, and the total granularity is 32 ten thousand ct, then adding the grinding material into a ball mill which is added with steel balls in advance for dry grinding to obtain a dry-grinding material, and communicating a discharge port of the ball mill with a rotary vibrating screen so as to input the dry-grinding material into the rotary vibrating screen after dry grinding; the gear of the feed inlet and the discharge outlet of the ball mill in the dry grinding is provided with three gears of high, medium and low, the feed inlet and the discharge outlet are respectively provided with a high gear, the feeding time is 8 ten thousand ct/time, and the time of the rotary vibration sieve is set to be 20min;
2) Wet milling: in the dry grinding process, the obtained dry grinding material which is input into the rotary vibration sieve and is coarser than the target granularity is subjected to wet grinding, the rotating speed is 45r/min, and the time is 40min (when the target granularity needs the material B, the process of each tank is only carried out in one stage, the last tank is less than 8 ten thousand ct, and the time can be shortened according to the actual quantity in proportion); specifically, steel balls with different sizes are proportioned according to an operation process and poured into a wet mill, weighed dry-milled materials are poured into the wet mill and added with water to a specified water level (8 ten thousand ct/time of feeding), the process is set according to requirements, a switch of the wet mill is turned on for ball milling, and then the materials are discharged, so that a cubic boron nitride finished product with target granularity is obtained. After shaping, the mixed granularity product is 31.5 ten thousand ct (with loss), the successful material with target granularity is 10.7 ten thousand ct, and the ratio is 33.96%
Example 8
A traditional shaping method of cubic boron nitride includes such steps as dry grinding the steel balls in ball-grinding tanks according to a certain ball-to-material ratio (5000-7000 ct/time for each ball-grinding tank), putting the ball-ground material in a proper sieve, sieving to obtain the required granularity of cubic boron nitride, putting the coarse granularity product in ball-grinding tank again, shaping, and repeating. The above operation was carried out under the same conditions as in example 7.
Example 9
The shaped products obtained in example 7 and example 8 were subjected to performance testing, and the specific results are shown in table 3. The specific detection method adopts GB/T33144-2016, GB/T6406-2016 and JB/T3584-2012. The basis criteria are: GB/T6408-2018 or enterprise standard Q/ZNJT01-2018.
TABLE 3 Performance test results Table
As can be seen from the data in Table 3, the conventional method in this embodiment yields a product with a target particle size of more than B. The successful material with the target granularity of 10.7 ten thousand ct and the ratio of 33.96 percent by adopting the method in the embodiment of the invention has high success rate and can freely grasp the equal product shape of the product.
Example 10
A method of shaping cubic boron nitride comprising the steps of:
1) Dry grinding: taking cubic boron nitride which is required to be processed into target granularity as a grinding material (the shaped target granularity is 60-70 meshes), the granularity is 50-60 meshes, and the total granularity is 30 ten thousand ct, then adding the grinding material into a ball mill which is added with steel balls in advance for dry grinding to obtain dry grinding materials, and communicating a discharge port of the ball mill with a rotary vibration sieve to input the dry grinding materials into the rotary vibration sieve after dry grinding; the gear of the feed inlet and the discharge outlet of the ball mill in the dry grinding is provided with three gears of high, medium and low, the feed inlet and the discharge outlet are respectively provided with a high gear, the feeding time is 5 ten thousand ct/time, and the time of the rotary vibration sieve is set to be 20min; the rotary vibration sieve comprises two layers of sieves which are sequentially arranged, each layer of sieves is provided with a discharge port, one discharge port is used for outputting dry-grinding materials, and the other discharge port is used for outputting materials with granularity not larger than the target granularity;
2) Wet milling: in the dry grinding process, the obtained dry grinding material which is input into the rotary vibration sieve and is coarser than the target granularity is subjected to wet grinding, wherein the wet grinding rotating speed is 20-30r/min and the wet grinding time is 20-30min (the last tank is less than 8 ten thousand ct, and the time can be proportionally shortened according to the actual quantity); specifically, steel balls with different sizes are proportioned according to an operation process and poured into a wet mill, weighed dry-milled materials are poured into the wet mill, water (the adding amount of the water is 0.1 time of the weight of the recycled grinding material) is added to a specified water level (8 ten thousand ct/time of feeding), the process is set according to requirements, a switch of the wet mill is turned on for ball milling, and then the materials are discharged, so that a cubic boron nitride finished product with target granularity is obtained.
Example 11
The procedure of example 10 was repeated except that the amount of water added was 0.5 times the weight of the abrasive back material as in example 10.
Example 12
The procedure of example 10 was repeated except that the amount of water added was 1 time the weight of the abrasive back material as compared with example 10.
Example 13
The procedure of example 10 was repeated except that the amount of water added was 3 times the weight of the abrasive back material as in example 10.
Example 14
Compared with example 10, the same as example 10 except that the water was added in an amount 5 times the weight of the regrind
Example 15
The procedure of example 10 was repeated except that the target particle size for the shaping was 60 to 70 mesh, the wet milling speed was 30 to 45r/min and the wet milling time was 30 to 40min, as compared with example 10.
Example 16
The procedure of example 10 was repeated except that the target particle size for the shaping was 70 to 80 mesh, the wet milling speed was 30 to 60r/min and the wet milling time was 40 to 65min, as compared with example 10.
Example 17
The procedure of example 10 was repeated except that the target particle size for the shaping was 80 to 100 mesh, the wet milling speed was 60 to 85r/min and the wet milling time was 50 to 70min, as compared with example 10.
Example 18
The procedure of example 10 was repeated except that the target particle size for the shaping was 100 to 120 mesh, the wet milling speed was 70 to 95r/min and the wet milling time was 70 to 90min, as compared with example 10.
Example 19
The procedure was the same as in example 10 except that the abrasive return particle size was 100 to 120 mesh, the target particle size for shaping was 140 to 170 mesh, and the wet milling rotational speed was 30 to 45r/min and the wet milling time was 30 to 40min, as compared with example 10.
Example 20
The procedure was the same as in example 10 except that the regrind had a particle size of 140 to 170 mesh, a target particle size for shaping of 170 to 200 mesh, and a wet milling rotation speed of 20 to 30r/min and a wet milling time of 20 to 30min, as compared with example 10.
Example 21
The procedure was the same as in example 10 except that the regrind had a particle size of 140 to 170 mesh, a target particle size for shaping of 200 to 230 mesh, and a wet milling rotation speed of 30 to 45r/min and a wet milling time of 30 to 40min, as compared with example 10.
Example 22
The procedure was the same as in example 10 except that the regrind had a particle size of 140 to 170 mesh, a target particle size for shaping of 230 to 270 mesh, and a wet milling rotation speed of 30 to 60r/min and a wet milling time of 40 to 65min, as compared with example 10.
Example 23
The procedure was the same as in example 10 except that the regrind had a particle size of 140 to 170 mesh, a target particle size for shaping of 270 to 325 mesh, and a wet milling rotation speed of 60 to 85r/min and a wet milling time of 50 to 70min, as compared with example 10.
Example 24
The procedure was the same as in example 10 except that the regrind had a particle size of 140 to 170 mesh, a target particle size for shaping of 325 to 400 mesh, and a wet milling rotation speed of 70 to 95r/min and a wet milling time of 70 to 90min, as compared with example 10.
In the above embodiment of the invention, the shaping method of cubic boron nitride provided by the invention comprises dry grinding and wet grinding operations, and the working efficiency can be improved, the yield of target granularity can be improved, the equal product shape can be freely mastered, the labor intensity is reduced, the dust is reduced, the environment is optimized, the industrial production is facilitated, and the production cost is remarkably reduced.
Compared with the prior art, the invention has the following beneficial effects:
1. the shaping method of the cubic boron nitride provided by the invention obviously improves the success rate of the target granularity of the cubic boron nitride, and for the same product, the target granularity of the method accounts for 30-50%; the traditional shaping method accounts for 8% -15%.
2. The shaping method of the invention remarkably improves the efficiency, and for the same product, the method carries out dry grinding and one-time feeding for 5 ten thousand ct, carries out wet grinding and one-time feeding for 8 ten thousand ct, and carries out one-time feeding for 3000-5000ct in the traditional shaping method.
3. The shaping method of the invention obviously reduces the labor intensity. The method is characterized in that after shaping, the discharge port of the dry mill is automatically discharged to a rotary vibration sieve; after the traditional shaping method is finished, the ball milling tank is manually moved from the ball mill, the mixed material and steel balls are poured into a self-made screen, so that the steel balls and the material are separated, and then the target granularity is screened out through a vibrating screen.
4. The shaping method can freely grasp the equal product shape of the product and meet the requirements of customers; the traditional shaping method generates more material A.
5. The shaping method of the invention greatly shortens the time and improves the efficiency, the maximum time required by the method is 90 minutes when the granularity of the cubic boron nitride abrasive is five granularities larger than the target granularity, and the traditional shaping time is 8 hours.
6. The shaping method of the invention obviously reduces environmental pollution, adopts a mode of entering and exiting at the same time when in dry grinding, has short ball grinding time, basically does not have dust, and does not generate dust when in wet grinding; the longer the ball milling time of the traditional shaping method, the more fine materials are generated, and the more dust is generated when the fine materials pass through a screen.
7. The shaping method of the invention obviously reduces the production cost and has wide market prospect.
While the preferred embodiments of the present invention have been described in detail, the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art. It is not necessary here nor is it exhaustive of all embodiments. And obvious variations or modifications thereof are contemplated as falling within the scope of the present invention.
Claims (8)
1. The shaping method of the cubic boron nitride is characterized by comprising the operations of dry grinding and wet grinding, and specifically comprises the following steps of:
1) Dry grinding: adding cubic boron nitride which needs to be processed into target granularity as a grinding material into a dry ball milling device for dry milling to obtain dry milling materials, wherein a discharge hole of the dry ball milling device is communicated with a rotary vibration screening device so as to input the dry milling materials into the rotary vibration screening device after dry milling;
2) Wet milling: in the dry grinding process, adding dry grinding materials input into the rotary vibration screening device into a wet grinding device, adding water to perform wet grinding, and pouring steel balls with different sizes according to an operation process proportion into the wet grinding device, wherein the process conditions of the wet grinding are selected from any one of the following conditions: the wet grinding rotating speed is 20-30r/min and the wet grinding time is 20-30min; the wet grinding rotating speed is 30-45r/min and the wet grinding time is 30-40min; the wet grinding rotating speed is 30-60r/min and the wet grinding time is 40-65min; the wet grinding rotating speed is 60-85r/min and the wet grinding time is 50-70min; or the wet grinding rotating speed is 70-95r/min and the wet grinding time is 70-90min, so as to obtain the cubic boron nitride finished product with the target granularity.
2. The method of shaping cubic boron nitride according to claim 1, wherein in the method of shaping cubic boron nitride, the size of the abrasive grain size in the dry grinding is larger than the target grain size.
3. The method of shaping cubic boron nitride according to claim 1, wherein the target particle size is 50-400 mesh.
4. The method of shaping cubic boron nitride according to claim 1, wherein the amount of water added in the method of shaping cubic boron nitride is 0.1 to 5 times the weight of the abrasive return material.
5. The method for shaping cubic boron nitride according to claim 1, wherein the rotary vibration screening device comprises two layers of screens which are arranged in sequence, each layer of screen is provided with a discharge port, one discharge port is used for outputting dry-milled materials, and the other discharge port is used for outputting materials with the granularity not larger than the target granularity.
6. A finished cubic boron nitride product having a target particle size prepared by the shaping method of cubic boron nitride according to any one of claims 1 to 5.
7. Use of a finished cubic boron nitride product having a target particle size according to claim 6 in abrasive machining.
8. Use of the method for shaping cubic boron nitride according to any one of claims 1 to 5 in abrasive machining for abrasive tools.
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