CN114131433A - Integral CBN cutter grinding process - Google Patents
Integral CBN cutter grinding process Download PDFInfo
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- CN114131433A CN114131433A CN202111422516.1A CN202111422516A CN114131433A CN 114131433 A CN114131433 A CN 114131433A CN 202111422516 A CN202111422516 A CN 202111422516A CN 114131433 A CN114131433 A CN 114131433A
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- Prior art keywords
- cutter
- grinding
- cbn
- integral
- finished
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Links
- 238000000034 method Methods 0.000 title claims abstract description 22
- 239000003292 glue Substances 0.000 claims abstract description 32
- 230000002093 peripheral effect Effects 0.000 claims abstract description 20
- 238000010438 heat treatment Methods 0.000 claims abstract description 8
- 238000005498 polishing Methods 0.000 claims abstract description 6
- 238000003754 machining Methods 0.000 claims abstract description 3
- 239000002184 metal Substances 0.000 claims description 6
- 229910052751 metal Inorganic materials 0.000 claims description 6
- 238000002844 melting Methods 0.000 claims description 5
- 230000008018 melting Effects 0.000 claims description 5
- 229910003460 diamond Inorganic materials 0.000 abstract description 6
- 239000010432 diamond Substances 0.000 abstract description 6
- 238000004026 adhesive bonding Methods 0.000 abstract 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 4
- 229910052582 BN Inorganic materials 0.000 description 3
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000011265 semifinished product Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 238000007728 cost analysis Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000047 product Substances 0.000 description 1
Images
Classifications
-
- 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
- B24B1/00—Processes of grinding or polishing; Use of auxiliary equipment in connection with such processes
-
- 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
- B24B3/00—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools
-
- 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
- B24B41/00—Component parts such as frames, beds, carriages, headstocks
- B24B41/06—Work supports, e.g. adjustable steadies
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Polishing Bodies And Polishing Tools (AREA)
Abstract
The invention discloses an integral CBN cutter grinding process, which relates to the technical field of superhard cutter grinding processes and comprises the following steps: s1) taking the integral CBN cutter blank which accords with the machining size, and polishing the upper bottom surface and the lower bottom surface of the integral CBN cutter blank by using a surface grinder; s2) gluing the polished integral CBN cutter blanks together by using glue; s3) grinding the side surface of the whole CBN cutter blank which is stuck in a combined state by using a surface grinder and a peripheral grinder in sequence; s4) heating by using an oven to melt the glue, so as to obtain a finished product of the integral CBN cutter; when glue is used for pasting, a specially-made positioning tool is used for preventing dislocation, the grinding precision of each cutter can be kept consistent, a plurality of integral CBN cutter blanks are pasted together, peripheral grinding can be simultaneously carried out by using a peripheral grinder, the peripheral grinding efficiency and the utilization rate of a peripheral grinding diamond grinding wheel are improved, and the grinding cost of the integral CBN cutter is greatly reduced.
Description
Technical Field
The invention relates to the technical field of superhard cutter grinding processes, in particular to an integral CBN cutter grinding process.
Background
Cubic Boron Nitride (CBN) is an artificially synthesized superhard material, is formed by adding a catalyst into soft hexagonal Boron Nitride under the conditions of ultrahigh temperature and high pressure, is a novel inorganic superhard material, is widely applied to the processing fields of different industries, is usually used for manufacturing superhard cutters due to the hardness of the hexagonal Boron Nitride second to that of diamond, and belongs to CBN cutters.
The grinding process is an important process for producing the integral CBN cutter, and the peripheral grinding cost accounts for more than 60% of the grinding process cost of the integral CBN cutter, because the integral CBN cutter has extremely high hardness, a diamond grinding wheel is needed when peripheral grinding is carried out, and the diamond grinding wheel is worn in the grinding process, has limited service life and needs to be frequently replaced; statistically, the peripheral grinding cost of the whole CBN tool accounts for about 30% of the total tool cost, so reducing the peripheral grinding cost plays a key role in reducing the production cost of the whole tool.
The current grinding research on CBN tools focuses mainly on the grinding of specially shaped surfaces and the research on grinding equipment, and there is no improved process for the cost of grinding.
Disclosure of Invention
The invention aims to: provided is a grinding process for an integral CBN tool, by which the peripheral grinding of a plurality of integral CBN tools can be simultaneously performed, the peripheral grinding efficiency of the integral CBN tool is improved, the utilization rate of a diamond grinding wheel of a peripheral grinder is improved, the peripheral grinding cost is reduced, and the total cost of the integral CBN tool is reduced.
The technical scheme adopted by the invention is as follows:
an integral CBN cutter grinding process comprises the following steps:
s1) taking the integral CBN cutter blank according with the machining size, grinding the upper bottom surface and the lower bottom surface of the integral CBN cutter blank by using a surface grinder, and polishing by using a grinder to obtain a semi-finished cutter A;
s2) taking a plurality of semi-finished cutters A, smearing the bottom surfaces of the semi-finished cutters A with glue, stacking the semi-finished cutters A, and placing the semi-finished cutters A in a positioning tool to be stuck together to obtain cutter units B;
s3) fixing the cutter unit B on a plane grinder, roughly grinding the side surface of the semi-finished cutter A, and then putting the semi-finished cutter A on a peripheral grinder for fine grinding to obtain a cutter unit C, wherein the cutter unit C consists of a plurality of finished cutters D;
s4) taking the cutter unit C, heating by using an oven, melting the glue, obtaining a plurality of independent finished cutters D, and finishing grinding of the whole CBN cutter.
Preferably, the positioning tool is made of a metal plate, and a plurality of V-shaped grooves are formed in the metal plate.
Preferably, in step S4), the oven heating temperature is 250 to 300 ℃.
Preferably, a plurality of the V-shaped grooves are parallel to each other and arranged at equal intervals on the metal plate.
Preferably, the integral CBN tool blank is in a shape of a right prism, and the angle of a group of opposite angles of the bottom surface of the integral CBN tool blank is the same as the included angle of the V-shaped groove.
Preferably, a groove is arranged below the V-shaped groove, and the V-shaped groove is communicated with the groove.
In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:
(1) the grinding efficiency of the periphery is improved in multiples by combining a plurality of semi-finished cutters A and fixing the semi-finished cutters A by using glue, and compared with the simultaneous grinding of the periphery of a single semi-finished cutter A, the grinding degree of a grinding wheel is not obviously increased, and the cost such as equipment depreciation, labor hour and the like is almost unchanged, so that the grinding cost of the single semi-finished cutter A is greatly reduced, and the aim of reducing the production cost of the whole CBN cutter is fulfilled;
(2) when the plurality of semi-finished cutters A are adhered together by using glue, the semi-finished cutters A are positioned by using a positioning tool, and the semi-finished cutters A are pressed into the V-shaped grooves by force in the positioning process, so that two adjacent side surfaces of the semi-finished cutters A are completely attached to the V-shaped grooves, that is, dislocation can be avoided during adhesion, and the precision of the subsequent grinding process is ensured;
(3) the lower part of the positioning tool is provided with a groove which is communicated with the V-shaped groove and can be used for discharging redundant glue between the semi-finished product cutter A, and the problem that the glue enters the contact surface between the semi-finished product cutter A and the V-shaped groove to influence the positioning precision is avoided.
Drawings
Fig. 1 is a perspective view of the positioning tool of the present invention.
Fig. 2 is a front view of the positioning tool of the present invention.
The labels in the figure are: 1. positioning a tool; 2. a V-shaped groove; 3. and (4) a groove.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail with reference to the accompanying drawings and embodiments, it being understood that the specific embodiments described herein are only for the purpose of explaining the present invention and are not intended to limit the present invention.
The technical solution claimed by the present invention will be explained in detail below by taking as an example an integral CBN tool named SNGN120412S02020, the finished product of which is a 4.76mm thick right prism shaped insert with a square base with a base radius of 1.2mm and an inscribed circle radius of 12.7 mm; the overall CBN tool blank used was a cuboid of 14mm by 5.5 mm.
Example 1
And (3) taking 300 integral CBN cutter blanks with the size of 14mm multiplied by 5.5mm, grinding the upper bottom surface and the lower bottom surface of the integral CBN cutter blanks by using a plane grinder until the thickness is about 5.0mm, and then polishing the upper bottom surface and the lower bottom surface of the integral CBN cutter blanks by using a grinder until the thickness is 4.76 +/-0.025 mm to obtain a semi-finished cutter A.
And (3) taking commercially available AB glue and 502 glue, and uniformly mixing the A glue, the B glue and the 502 glue according to the mass ratio of 10:8:2 for later use.
Preparing a positioning tool 1, wherein the positioning tool 1 is made of an iron plate with the size of 200mm multiplied by 5mm, a V-shaped groove 2 is arranged on the upper surface of the positioning tool, the included angle of the V-shaped groove 2 is 90 degrees, a groove 3 is arranged below the V-shaped groove 2, the cross section of the groove 3 is rectangular, and the groove 3 is communicated with the bottom of the V-shaped groove 2.
Taking 3 semi-finished cutters A, smearing the bottom surfaces of the semi-finished cutters A by using prepared glue, then stacking the semi-finished cutters A and placing the semi-finished cutters A in the V-shaped groove 2 on the positioning tool 1, standing for 30 minutes to enable the semi-finished cutters A to be stuck together to obtain cutter units B, and repeating the steps to obtain 100 cutter units B as shown in the figures 1 and 2.
Fixing the cutter unit B on a plane grinder, carrying out rough grinding on the side surface of the semi-finished cutter A until the side length of the bottom surface is 12.9-12.95 mm, then placing the cutter unit B on a periphery grinder for fine grinding until the bottom surface is 12.7mm in side length and 1.2mm in chamfer radius to obtain a cutter unit C, wherein the cutter unit C consists of 3 finished cutters D;
and (3) taking the cutter unit C, heating to 300 ℃ by using an oven, melting the glue to obtain 300 separated finished cutters D, and finishing grinding of the whole CBN cutter.
Example 2
And (3) taking 300 integral CBN cutter blanks with the size of 14mm multiplied by 5.5mm, grinding the upper bottom surface and the lower bottom surface of the integral CBN cutter blanks by using a plane grinder until the thickness is about 5.0mm, and then polishing the upper bottom surface and the lower bottom surface of the integral CBN cutter blanks by using a grinder until the thickness is 4.76 +/-0.025 mm to obtain a semi-finished cutter A.
And (3) taking commercially available AB glue and 502 glue, and uniformly mixing the A glue, the B glue and the 502 glue according to the mass ratio of 10:8:2 for later use.
Preparing a positioning tool 1, wherein the positioning tool 1 is made of an iron plate with the size of 200mm multiplied by 5mm, a V-shaped groove 2 is arranged on the upper surface of the positioning tool, the included angle of the V-shaped groove 2 is 90 degrees, a groove 3 is arranged below the V-shaped groove 2, the cross section of the groove 3 is rectangular, and the groove 3 is communicated with the bottom of the V-shaped groove 2.
Taking 5 semi-finished cutters A, smearing the bottom surfaces of the semi-finished cutters A by using prepared glue, then stacking the semi-finished cutters A and placing the semi-finished cutters A in the V-shaped groove 2 on the positioning tool 1, standing for 30 minutes to enable the semi-finished cutters A to be stuck together to obtain cutter units B, and repeating the steps to obtain the rest semi-finished cutters A as shown in the figures 1 and 2, and finally obtaining 60 cutter units B.
Fixing the cutter unit B on a plane grinder, carrying out rough grinding on the side surface of the semi-finished cutter A until the side length of the bottom surface is 12.9-12.95 mm, then placing the cutter unit B on a periphery grinder for fine grinding until the bottom surface is 12.7mm in side length and 1.2mm in chamfer radius to obtain a cutter unit C, wherein the cutter unit C consists of 3 finished cutters D;
and (3) taking the cutter unit C, heating to 280 ℃ by using an oven, melting the glue to obtain 300 separated finished cutters D, and finishing grinding of the integral CBN cutter.
Example 3
And (3) taking 300 integral CBN cutter blanks with the size of 14mm multiplied by 5.5mm, grinding the upper bottom surface and the lower bottom surface of the integral CBN cutter blanks by using a plane grinder until the thickness is about 5.0mm, and then polishing the upper bottom surface and the lower bottom surface of the integral CBN cutter blanks by using a grinder until the thickness is 4.76 +/-0.025 mm to obtain a semi-finished cutter A.
And (3) taking commercially available AB glue and 502 glue, and uniformly mixing the A glue, the B glue and the 502 glue according to the mass ratio of 10:8:2 for later use.
Preparing a positioning tool 1, wherein the positioning tool 1 is made of an iron plate with the size of 200mm multiplied by 5mm, a V-shaped groove 2 is arranged on the upper surface of the positioning tool, the included angle of the V-shaped groove 2 is 90 degrees, a groove 3 is arranged below the V-shaped groove 2, the cross section of the groove 3 is rectangular, and the groove 3 is communicated with the bottom of the V-shaped groove 2.
Taking 4 semi-finished cutters A, smearing the bottom surfaces of the semi-finished cutters A by using prepared glue, then stacking the semi-finished cutters A and placing the stacked semi-finished cutters A in the V-shaped groove 2 on the positioning tool 1, standing for 30 minutes to enable the semi-finished cutters A to be stuck together to obtain cutter units B, and repeating the steps to obtain 75 cutter units B as shown in the figures 1 and 2.
Fixing the cutter unit B on a plane grinder, carrying out rough grinding on the side surface of the semi-finished cutter A until the side length of the bottom surface is 12.9-12.95 mm, then placing the cutter unit B on a periphery grinder for fine grinding until the bottom surface is 12.7mm in side length and 1.2mm in chamfer radius to obtain a cutter unit C, wherein the cutter unit C consists of 3 finished cutters D;
and (3) taking the cutter unit C, heating to 280 ℃ by using an oven, melting the glue to obtain 300 separated finished cutters D, and finishing grinding of the integral CBN cutter.
And (3) cost analysis:
According to actual production experience, the peripheral grinding cost of the integral CBN cutter is about 30% of the total cost of the cutter, and according to the numerical value, the total cost of the cutter of the embodiments 1-3 is respectively reduced by 20%, 24% and 22.5%, so that the economic benefit is obvious.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (6)
1. The integral CBN cutter grinding process is characterized by comprising the following steps:
s1) taking the integral CBN cutter blank according with the machining size, grinding the upper bottom surface and the lower bottom surface of the integral CBN cutter blank by using a surface grinder, and polishing by using a grinder to obtain a semi-finished cutter A;
s2) taking a plurality of semi-finished cutters A, smearing the bottom surfaces of the semi-finished cutters A with glue, stacking the semi-finished cutters A, and placing the semi-finished cutters A in a positioning tool to be stuck together to obtain cutter units B;
s3) fixing the cutter unit B on a plane grinder, roughly grinding the side surface of the semi-finished cutter A, and then putting the semi-finished cutter A on a peripheral grinder for fine grinding to obtain a cutter unit C, wherein the cutter unit C consists of a plurality of finished cutters D;
s4) taking the cutter unit C, heating by using an oven, melting the glue, obtaining a plurality of independent finished cutters D, and finishing grinding of the whole CBN cutter.
2. The grinding process for the integral CBN cutter as claimed in claim 1, wherein the positioning tool (1) is made of a metal plate, a plurality of V-shaped grooves (2) are formed in the metal plate, and the V-shaped grooves (2) are used for placing a semi-finished cutter A.
3. The process of claim 1, wherein the oven heating temperature in step S4) is 250 ℃ to 300 ℃.
4. A unitary CBN tool grinding process according to claim 2, characterised in that a number of the V-shaped grooves (2) are parallel to each other and are arranged equidistantly on the metal plate.
5. A unitary CBN tool grinding process according to claim 2 in which the unitary CBN tool blank is in the form of a right prism and the angle of a set of opposite corners of the base of the unitary CBN tool blank is the same as the angle of the V-shaped groove (2).
6. A unitary CBN tool grinding process according to claim 2, characterised in that a groove (3) is provided below the V-shaped groove (2), the V-shaped groove (2) and the groove (3) being in communication.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111422516.1A CN114131433A (en) | 2021-11-26 | 2021-11-26 | Integral CBN cutter grinding process |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111422516.1A CN114131433A (en) | 2021-11-26 | 2021-11-26 | Integral CBN cutter grinding process |
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| CN114131433A true CN114131433A (en) | 2022-03-04 |
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| CN202111422516.1A Pending CN114131433A (en) | 2021-11-26 | 2021-11-26 | Integral CBN cutter grinding process |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101337333A (en) * | 2008-07-10 | 2009-01-07 | 浙江迪邦达轴承有限公司 | Thin-wall parts grinding method capable of preventing surface from warping |
| CN103481143A (en) * | 2013-09-26 | 2014-01-01 | 浙江文瑞科技发展有限公司 | Batch multi-surface stone material grinding method and stone grinding machine for implementing same |
| CN104625940A (en) * | 2013-11-12 | 2015-05-20 | 昆山科尼电子器材有限公司 | Silicon wafer grinding and optical polishing system and machining technology thereof |
| CN104668988A (en) * | 2015-01-09 | 2015-06-03 | 南阳市百施特光电有限公司 | Tool clamp for machining prism and application method of tool clamp |
| CN108972333A (en) * | 2018-07-21 | 2018-12-11 | 开封贝斯科超硬材料有限公司 | Cubic boron nitride cutting tool V-type positioning surface plain grinding accommodates tooling |
-
2021
- 2021-11-26 CN CN202111422516.1A patent/CN114131433A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101337333A (en) * | 2008-07-10 | 2009-01-07 | 浙江迪邦达轴承有限公司 | Thin-wall parts grinding method capable of preventing surface from warping |
| CN103481143A (en) * | 2013-09-26 | 2014-01-01 | 浙江文瑞科技发展有限公司 | Batch multi-surface stone material grinding method and stone grinding machine for implementing same |
| CN104625940A (en) * | 2013-11-12 | 2015-05-20 | 昆山科尼电子器材有限公司 | Silicon wafer grinding and optical polishing system and machining technology thereof |
| CN104668988A (en) * | 2015-01-09 | 2015-06-03 | 南阳市百施特光电有限公司 | Tool clamp for machining prism and application method of tool clamp |
| CN108972333A (en) * | 2018-07-21 | 2018-12-11 | 开封贝斯科超硬材料有限公司 | Cubic boron nitride cutting tool V-type positioning surface plain grinding accommodates tooling |
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