CN113146167A - Tool grain finish machining method - Google Patents
Tool grain finish machining method Download PDFInfo
- Publication number
- CN113146167A CN113146167A CN202110402454.1A CN202110402454A CN113146167A CN 113146167 A CN113146167 A CN 113146167A CN 202110402454 A CN202110402454 A CN 202110402454A CN 113146167 A CN113146167 A CN 113146167A
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- Prior art keywords
- blade
- single crystal
- cutter
- grinding
- width
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- 238000000034 method Methods 0.000 title claims abstract description 19
- 238000003754 machining Methods 0.000 title claims abstract description 16
- 238000005520 cutting process Methods 0.000 claims abstract description 54
- 239000013078 crystal Substances 0.000 claims abstract description 39
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 21
- 239000010959 steel Substances 0.000 claims abstract description 21
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims abstract description 20
- 229910052721 tungsten Inorganic materials 0.000 claims abstract description 20
- 239000010937 tungsten Substances 0.000 claims abstract description 20
- 239000002245 particle Substances 0.000 claims abstract description 16
- 238000003466 welding Methods 0.000 claims abstract description 9
- 239000002994 raw material Substances 0.000 claims abstract description 7
- 238000005498 polishing Methods 0.000 claims description 6
- 229910001018 Cast iron Inorganic materials 0.000 claims description 4
- 230000003746 surface roughness Effects 0.000 claims description 3
- 238000007670 refining Methods 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 2
- 238000010923 batch production Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000007781 pre-processing Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
- B23P15/28—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass cutting tools
- B23P15/30—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass cutting tools lathes or like tools
Abstract
The invention provides a cutter grain finish machining method, which comprises the following steps: carrying out first pretreatment on a raw material; welding the tungsten steel block on the blade body at high frequency, and performing second pretreatment on the surface of the tungsten steel block to form a second machined part; welding the MCD single crystal blade on a tungsten steel block through vacuum to form a blade particle; the error between the height of the front cutter face of the MCD single crystal blade and the height of the center of the cutter body is +/-0.03 mm; roughly grinding the MCD single crystal blade to form a rear tool face, wherein the included angle between the rear tool face and the cutting plane is 25 +/-0.5 degrees; finely grinding the MCD single crystal blade to form a blade edge, measuring whether the included angle between the blade edge and the cutting plane is between 0.5 and 0.6 degrees and whether the width of the blade edge is more than 0.3mm by adopting a microscope, and if not, continuously finely grinding; if so, finely grinding the rear cutter face, and keeping the width of the cutter edge between 0.05 and 0.1mm to finish the fine machining of the cutter particles. Therefore, the included angle between the cutting edge and the cutting plane can be accurately controlled, the yield of the cutting particles can be effectively improved, and the rework rate can be reduced.
Description
[ technical field ] A method for producing a semiconductor device
The invention relates to the technical field of cutter machining, in particular to a cutter grain finish machining method.
[ background of the invention ]
As is well known, an industrial cutting insert, also called a cutting insert, is a tool used for cutting in machine manufacturing, also called a cutting tool, including a grinding tool, generally composed of a cutter body and a sheet material, and is mainly suitable for fine machining and semi-fine machining of data such as steel, cast iron, stainless steel, etc. Repeated tests show that the cutter has the best effect when the included angle between the rear cutter face of the cutter and the cutting plane is 0.5-0.6 degrees for products with higher requirements on the processing effect.
In addition, the existing method for controlling the included angle between the rear cutter face of the cutter grain and the cutting plane generally adopts the adjustment of the scale of a clamp, the method cannot accurately control the size of the included angle, the consistency of the included angle is difficult to guarantee, the rework rate of the cutter grain is high, the production efficiency is low, and the mass production is not high.
Accordingly, the prior art is in need of improvement and development.
[ summary of the invention ]
The invention aims to provide a cutter grain finish machining method which is used for solving the problems of high rework rate and low mass production caused by poor consistency of an included angle between a rear cutter face and a cutting plane of the conventional cutter grain machining.
The technical scheme of the invention is as follows: a method of fine machining a cutting insert comprising the steps of:
A. performing first pretreatment on a raw material to form a cutter body with a cutter blade body and a groove hole, wherein the thickness tolerance of the cutter body is 0.02mm, the tolerances of the width and the length of the cutter body are both 0.01mm, and the surface roughness of the cutter body is less than 0.2 mu m;
B. welding the tungsten steel block on the blade body at high frequency, and performing second pretreatment on the surface of the tungsten steel block to form a second machined part;
C. performing third pretreatment on the MCD single crystal sheet to form an MCD single crystal blade, wherein the tolerance of the thickness of the MCD single crystal blade is 0.01 mm;
D. welding an MCD single crystal blade on a tungsten steel block through vacuum to form a blade, wherein the error between the height of a front blade surface of the MCD single crystal blade and the height of the center of a blade body is +/-0.03 mm;
E. roughly grinding the MCD single crystal blade to form a rear tool face, wherein the included angle between the rear tool face and a cutting plane is 25 +/-0.5 degrees;
F. accurately grinding the MCD single crystal blade to form a blade edge, measuring whether the included angle between the blade edge and the cutting plane is between 0.5 and 0.6 degrees and whether the width of the blade edge is more than 0.3mm by adopting a microscope, and if not, continuously and accurately grinding the MCD single crystal blade;
G. and when the included angle between the blade edge and the cutting plane is between 0.5 and 0.6 degrees and the width of the blade edge is more than 0.3mm, finely grinding the rear blade surface to ensure that the width of the blade edge is between 0.05 and 0.1mm, and finishing the fine machining of the blade particles.
Further, the first pre-processing comprises the steps of:
a1, cutting the raw material through a middle wire to form a first processed body with a blade body and a groove hole, wherein the tolerance of the thickness, the width and the length of the first processed body is +/-0.05 mm;
and A2, polishing and grinding the first processed body by a surface grinder to form the cutter body.
Further, the second pretreatment is to polish and polish the surface of the tungsten steel block by a surface grinder.
Further, the third pretreatment is to polish and grind the MCD single crystal sheet by a surface grinder.
Further, in step E, a cast iron grinding disc is used to perform rough grinding on the tool bits.
Further, in steps F and G, refining is performed using natural grinding discs.
Furthermore, the thickness of the cutter body is 7 +/-0.02 mm, the width of the cutter body is 12 +/-0.04 mm, and the length of the cutter body is 29.5 +/-0.1 mm.
Further, in the second workpiece, the height between the tungsten steel block and the blade body is 5.1 +/-0.02 mm.
The invention has the beneficial effects that: compared with the prior art, the method has the advantages that the sizes of all steps are limited, so that the consistency of all the machined cutting edges is kept, the yield of the cutting edges can be greatly improved, and the yield is improved. The height control of the front cutter face of the MCD single crystal blade is consistent with the center height of the cutter body, so that the phenomenon that the included angle between the blade edge of the blade and the cutting plane is influenced due to the fact that the center height of the blade is inconsistent can be prevented, when the blade edge is formed by accurately grinding the MCD single crystal blade, a microscope is adopted to measure whether the included angle between the blade edge and the cutting plane is 0.5-0.6 degrees or not and whether the width of the blade edge is more than 0.3mm or not, if not, the MCD single crystal blade is continuously and accurately ground, therefore, the included angle between the blade edge and a vertical plane (namely the cutting plane) can be accurately controlled, the yield of the blade can be effectively improved, and the rework rate can be effectively reduced.
[ description of the drawings ]
FIG. 1 is a flow chart of the present invention.
Fig. 2 is a front view of a second workpiece according to the invention.
Fig. 3 is a cross-sectional view of the second workpiece of fig. 2 taken along the direction a-a.
Fig. 4 is a cross-sectional view of a cartridge according to the present invention.
Fig. 5 is a front view of a cartridge according to the present invention.
[ detailed description ] embodiments
The invention is further described with reference to the following figures and embodiments.
In the prior art, because the precision requirement of the included angle between the cutting edge of the knife particle and the cutting plane is too high, the included angle between the cutting edge of the knife particle and the cutting plane cannot be accurately controlled by a traditional clamp, and the included angle between the cutting edge of the knife particle and the cutting plane is influenced by the height of the center of the knife particle. The included angles between the cutting edges of the actually made cutter particles and the cutting plane are different due to different center heights of the same group of cutters, so that the consistency of the included angles cannot be guaranteed, the rework rate of the cutters is high, the production efficiency is low, and the mass production performance is not high.
Therefore, the invention provides a tool grain finishing method in an embodiment.
Referring to fig. 1-5, the method for finishing the cutting insert comprises the following steps:
and S10, performing first pretreatment on the raw material to form a cutter body with a cutter blade body 5 and a groove hole 11, wherein the thickness tolerance of the cutter body is 0.02mm, the tolerances of the width and the length of the cutter body are both 0.01mm, and the surface roughness of the cutter body is less than 0.2 mm.
Specifically, the first pretreatment includes the steps of:
s11, cutting the raw material through a middle wire to form a first processed body with the blade body 5 and the groove hole 11, wherein the tolerance of the thickness, the width and the length of the first processed body is +/-0.05 mm;
and S12, polishing and grinding the first processed body through a surface grinding machine to form the cutter body.
The definition of each parameter is to keep the consistency of the cutter body, and the control of the roughness of the cutter body to be less than 0.2 mu m is to reduce the influence of the roughness of the cutter body on the included angle between the later-grinding cutter face and the cutting plane.
S20, high-frequency welding the tungsten steel block 2 on the blade body 5, and performing a second pretreatment on the surface of the tungsten steel block 2 to form a second workpiece, as shown in fig. 2 and 3. The size of each second workpiece is kept consistent through the step.
Wherein, the second pretreatment is to polish and grind the surface of the tungsten steel block 2 by a surface grinder. The height d of the surface of the tungsten steel block 2 on each second workpiece from the center of the cutter body is the same by polishing and grinding the surface of the tungsten steel block 2, and when the MCD single crystal blade 3 is welded in the later period, the surface (front blade surface) of the MCD single crystal blade 3 can be better consistent with the height d of the center of the cutter body, and the thickness of the MCD single crystal blade 3 of each finally finished cutter particle is kept consistent.
And S30, performing third pretreatment on the MCD single crystal sheet to form the MCD single crystal blade 3, wherein the thickness tolerance of the MCD single crystal blade 3 is 0.01 mm. Here, the tolerance is controlled to be 0.01mm, so that the foundation can be laid for controlling the width of the blade in the later period, and the error is reduced. And the third pretreatment is to polish and grind the MCD single crystal sheet by a surface grinder.
S40, welding the MCD single crystal blade 3 on the tungsten steel block 2 through vacuum welding to form a blade, wherein the error between the front blade surface of the MCD single crystal blade 3 and the center height d of the blade body is +/-0.03 as shown in the figure-. Therefore, the sizes of the cutter granules can be kept consistent in batch production.
S50, the MCD single crystal blade 3 is roughly ground to form a flank face, and the angle y2 between the flank face and the cutting plane is 25 ° ± 0.5 °, as shown in fig. 5. Here, the tool face after the rough grinding is used for avoiding the space, and the workpiece processing of interference processing is prevented for the accurate grinding blade which can be more convenient in the later period. Specifically, in this step, adopt the cast iron mill to carry out the corase grind to the tool grain, the cutting dynamics of this mill is big, can improve the efficiency of corase grind.
And S60, finely grinding the MCD single crystal blade 3 to form a blade edge, measuring whether the included angle y1 between the blade edge and the cutting plane is 0.5-0.6 degrees and the width of the blade edge is more than 0.3mm by using a microscope, if not, continuously finely grinding the MCD single crystal blade 3, and repeatedly processing until the included angle y1 between the blade edge and the cutting plane is controlled to be 0.5-0.6 degrees and the width of the blade edge is controlled to be more than 0.3 mm. The reason for controlling the width of the cutting edge to be 0.3mm or more is to measure the included angle y2 between the flank face and the cutting plane. Therefore, the included angle y1 between the blade and the vertical plane (i.e. the cutting plane) can be accurately controlled.
And S70, when the included angle y1 between the blade edge and the cutting plane is between 0.5 and 0.6 degrees and the width of the blade edge is more than 0.3mm, continuing to finely grind the rear blade surface, and controlling the width f of the blade edge to be between 0.05 and 0.1mm, thereby finishing the fine machining of the blade particles.
Specifically, in steps S60 and S70, the grinding is performed with a natural millstone having a small grinding force, and the grinding speed is slow but the roughness is better when the MCD single crystal blade 3 is processed.
According to the invention, the size of each step is controlled, so that the consistency of each processed cutting edge is kept, the yield of the cutting edge can be greatly improved, the yield is improved, the rework rate is reduced, and the problems of high rework rate and low mass production caused by poor consistency of an included angle between the cutting edge and a cutting plane in the conventional cutting edge processing are solved.
In the above embodiment, after the processing in step S10, the thickness a of the cutter body is controlled to be 7 ± 0.02mm, the width c is controlled to be 12 ± 0.04mm, and the length b is controlled to be 29.5 ± 0.1mm, i.e. the central height d of the cutter body is 6 mm. After the processing in the step S20, in the second workpiece, the height e between the tungsten steel block 2 and the blade body 5 is 5.1 ± 0.02 mm. After the processing in step S40, the height of the rake face of the MCD single crystal blade 3 in the cut piece was 6mm, which was identical to the center height d of the cutter body. Therefore, the fine machining of the cutter particles is performed in cooperation with the steps S50, S60 and S70, so that the consistency of each machined cutting edge can be kept, and the phenomenon that the included angle y1 between the cutting edge of the cutter particle and the cutting plane is influenced due to the fact that the center heights of the cutter particles are inconsistent is prevented, and therefore the yield of the cutter particles can be effectively improved, and the rework rate can be reduced.
While the foregoing is directed to embodiments of the present invention, it will be understood by those skilled in the art that various changes may be made without departing from the spirit and scope of the invention.
Claims (8)
1. A method of fine machining a cutting insert, comprising the steps of:
A. performing first pretreatment on a raw material to form a cutter body with a cutter blade body and a groove hole, wherein the thickness tolerance of the cutter body is 0.02mm, the tolerances of the width and the length of the cutter body are both 0.01mm, and the surface roughness of the cutter body is less than 0.2 mu m;
B. welding the tungsten steel block on the blade body at high frequency, and performing second pretreatment on the surface of the tungsten steel block to form a second machined part;
C. performing third pretreatment on the MCD single crystal sheet to form an MCD single crystal blade, wherein the tolerance of the thickness of the MCD single crystal blade is 0.01 mm;
D. welding an MCD single crystal blade on a tungsten steel block through vacuum to form a blade, wherein the error between the height of a front blade surface of the MCD single crystal blade and the height of the center of a blade body is +/-0.03 mm;
E. roughly grinding the MCD single crystal blade to form a rear tool face, wherein the included angle between the rear tool face and a cutting plane is 25 +/-0.5 degrees;
F. accurately grinding the MCD single crystal blade to form a blade edge, measuring whether the included angle between the blade edge and the cutting plane is between 0.5 and 0.6 degrees and whether the width of the blade edge is more than 0.3mm by adopting a microscope, and if not, continuously and accurately grinding the MCD single crystal blade;
G. and when the included angle between the blade edge and the cutting plane is between 0.5 and 0.6 degrees and the width of the blade edge is more than 0.3mm, finely grinding the rear blade surface to ensure that the width of the blade edge is between 0.05 and 0.1mm, and finishing the fine machining of the blade particles.
2. The insert finishing method according to claim 1, wherein the first pretreatment comprises the steps of:
a1, cutting the raw material through a middle wire to form a first processed body with a blade body and a groove hole, wherein the tolerance of the thickness, the width and the length of the first processed body is +/-0.05 mm;
and A2, polishing and grinding the first processed body by a surface grinder to form the cutter body.
3. The insert finishing method according to claim 2, wherein the second pretreatment is polishing and grinding the surface of the tungsten steel block by a surface grinder.
4. The insert finishing method according to claim 3, wherein the third pretreatment is polishing and grinding of the MCD single crystal sheet by a surface grinder.
5. The insert finishing method according to claim 4, wherein in step E, the insert is coarsely ground using a cast iron grinding disc.
6. The method of claim 5, wherein in steps F and G, the refining is performed using a natural refiner disc.
7. The insert finishing method of claim 6, wherein the body has a thickness of 7 ± 0.02mm, a width of 12 ± 0.04mm, and a length of 29.5 ± 0.1 mm.
8. The insert finishing method according to claim 7, wherein the height of the tungsten steel block from the blade body in the second workpiece is 5.1 ± 0.02 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110402454.1A CN113146167A (en) | 2021-04-14 | 2021-04-14 | Tool grain finish machining method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110402454.1A CN113146167A (en) | 2021-04-14 | 2021-04-14 | Tool grain finish machining method |
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| CN113146167A true CN113146167A (en) | 2021-07-23 |
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| CN202110402454.1A Pending CN113146167A (en) | 2021-04-14 | 2021-04-14 | Tool grain finish machining method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113547389A (en) * | 2021-07-28 | 2021-10-26 | 大连理工大学 | Ultra-precise grinding process for tungsten alloy part with complex curved surface |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102172823A (en) * | 2011-01-13 | 2011-09-07 | 上海大学 | Multi-blade polycrystalline diamond (PCD) milling tool for processing carbon fiber reinforced plastics and manufacturing method thereof |
| CN103433551A (en) * | 2013-09-04 | 2013-12-11 | 马鞍山市恒利达机械刀片有限公司 | Swinging type concave-convex shear blade and manufacturing method thereof |
| CN106903334A (en) * | 2017-03-29 | 2017-06-30 | 深圳市中天超硬工具股份有限公司 | Chemical vapour deposition diamond cutter and its processing method |
| DE102016221518A1 (en) * | 2016-11-03 | 2018-03-08 | Schaeffler Technologies AG & Co. KG | Tool holder for a cutting machine and method of manufacturing such |
| CN111015142A (en) * | 2019-12-23 | 2020-04-17 | 浙江浪潮精密机械有限公司 | Hard alloy woodworking cutting milling cutter and processing technology thereof |
-
2021
- 2021-04-14 CN CN202110402454.1A patent/CN113146167A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102172823A (en) * | 2011-01-13 | 2011-09-07 | 上海大学 | Multi-blade polycrystalline diamond (PCD) milling tool for processing carbon fiber reinforced plastics and manufacturing method thereof |
| CN103433551A (en) * | 2013-09-04 | 2013-12-11 | 马鞍山市恒利达机械刀片有限公司 | Swinging type concave-convex shear blade and manufacturing method thereof |
| DE102016221518A1 (en) * | 2016-11-03 | 2018-03-08 | Schaeffler Technologies AG & Co. KG | Tool holder for a cutting machine and method of manufacturing such |
| CN106903334A (en) * | 2017-03-29 | 2017-06-30 | 深圳市中天超硬工具股份有限公司 | Chemical vapour deposition diamond cutter and its processing method |
| CN111015142A (en) * | 2019-12-23 | 2020-04-17 | 浙江浪潮精密机械有限公司 | Hard alloy woodworking cutting milling cutter and processing technology thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113547389A (en) * | 2021-07-28 | 2021-10-26 | 大连理工大学 | Ultra-precise grinding process for tungsten alloy part with complex curved surface |
| CN113547389B (en) * | 2021-07-28 | 2022-07-05 | 大连理工大学 | Ultra-precise grinding process for tungsten alloy part with complex curved surface |
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Application publication date: 20210723 |