CN113118528B - Superhard three-sided edge milling blade - Google Patents
Superhard three-sided edge milling blade Download PDFInfo
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- CN113118528B CN113118528B CN201911395769.7A CN201911395769A CN113118528B CN 113118528 B CN113118528 B CN 113118528B CN 201911395769 A CN201911395769 A CN 201911395769A CN 113118528 B CN113118528 B CN 113118528B
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- cutting edge
- superhard
- edge part
- blade body
- blade
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C5/00—Milling-cutters
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C2200/00—Details of milling cutting inserts
- B23C2200/12—Side or flank surfaces
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C2210/00—Details of milling cutters
- B23C2210/20—Number of cutting edges
- B23C2210/202—Number of cutting edges three
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Milling Processes (AREA)
Abstract
The invention discloses a superhard three-edge milling blade, which comprises a blade body; the blade body has an upper surface, a lower surface and a side surface connecting the upper and lower surfaces; a center hole penetrating through the upper surface and the lower surface is arranged in the center of the blade body along the thickness direction of the blade body; the projection of the blade body on the plane is in a shape of a parallelogram; at least one of the four side surfaces of the blade body is provided with a cutting edge part and a sinking groove which are formed on the superhard material body in a laser processing mode; the cutting edge portion is defined by a first rake surface, a second rake surface, a side surface, and an upper surface or a lower surface. The invention can provide powerful guarantee for high-speed, high-efficiency and high-precision groove milling, and has the characteristics of high economy, good chip cutting control, effective cutting force reduction and easy blade replacement.
Description
Technical Field
The invention relates to the technical field of cutters, in particular to a superhard three-edge milling blade.
Background
At present, the mechanical manufacturing is developed to high-speed, high-efficiency, high-precision and automatic directions, the requirements on the performance stability and the service life of the cutting machining blade are higher and higher, and along with the continuous innovation of cutting machining tool materials, superhard tool materials are appeared, so that the requirements of high-speed, high-efficiency and high-precision machining are met.
Superhard cutter materials commonly comprise PCBN (polycrystalline cubic boron nitride) and PCD (polycrystalline diamond), wherein mixed powder of CBN (cubic boron nitride) or diamond and a bonding agent and a hard alloy substrate are filled into a sealing box, and are sintered under high temperature and high pressure conditions and combined with a substrate to form a sintered body. In the process from the sintered body to the finished product of the cutter, firstly, the raw material of the sintered body is cut, then welded on a hard alloy substrate or welded on a steel cutter supporting body, and then the cutter edge is subjected to grinding finish machining.
The three-sided milling cutter has a main cutting edge on the circumferential surface and a secondary cutting edge on both sides, thereby improving cutting conditions, improving cutting efficiency and reducing surface roughness. The milling cutter is mainly applied to milling of step surfaces and groove surfaces of metal materials with medium hardness and strength, and also can be applied to milling of nonmetallic materials, and the three-edge milling cutter of superhard materials is used for milling of step surfaces and groove surfaces of difficult-to-cut materials. The milling machine is mainly used for milling a groove with a fixed size, and can also be used for milling a general groove, a step surface and a side surface.
Currently, the main stream of superhard blades is a flat blade, and three-sided cutters of superhard materials on the market are also groove-free and flat welded type integral three-sided cutters. The circulation of the superhard three-sided milling blade with the groove is not found in the market, mainly because superhard materials such as PCBN and PCD on a composite sheet for manufacturing the superhard blade are harder to process than conventional hard alloy materials, the blade with the groove is harder to process, the through groove can be ground and formed in a groove cutting mode, and the conventional processing means cannot finish the 3D groove type. In the grooving field, customers generally require higher cutting speed for pursuing high efficiency, and conventional hard alloy blades are not enough in hardness, so that the abrasion of front and rear blade surfaces of a cutter is accelerated, while superhard flat blades are not provided with grooves, and chips are difficult to control, so that the chips are blocked, therefore, the two types of blades are easy to cause poor finish of the machined surface, the service life of the blades is reduced, the replacement period of the blades is shortened, the production efficiency is relatively reduced, and the requirements of customers are not met.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, and provides the superhard three-edge milling blade, which can provide powerful guarantee for high-speed, high-efficiency and high-precision groove milling processing through structural improvement and has the characteristics of high economy, good chip cutting control, effective cutting force reduction and easy blade replacement.
The technical scheme adopted for solving the technical problems is as follows: a superhard three-sided milling insert comprises an insert body; the blade body has an upper surface, a lower surface and a side surface connecting the upper and lower surfaces; a center hole penetrating through the upper surface and the lower surface is arranged in the center of the blade body along the thickness direction of the blade body; the projection of the blade body on the plane is in a shape of a parallelogram; at least one of the four side surfaces of the blade body is provided with a cutting edge part and a sinking groove which are formed on the superhard material body in a laser processing mode; the cutting edge portion is defined by a first rake surface, a second rake surface, a side surface, and an upper surface or a lower surface.
Of the four sides of the blade body, only one side is provided with a cutting edge portion and a countersink formed on the superhard material body by means of laser machining.
Among the four sides of the blade body, two opposite sides are respectively provided with a cutting edge part and a sink groove which are formed on the superhard material body in a laser processing mode.
In the side surface provided with the cutting edge parts, the upper part of the side surface is provided with a first cutting edge part, the lower part of the side surface is provided with a second cutting edge part, and the first cutting edge part and the second cutting edge part are in symmetrical structures relative to the horizontal center line of the side surface.
The countersink is disposed between the second rake surface of the first cutting edge portion and the second rake surface of the second cutting edge portion, and the countersink is lower than the second rake surface of the first cutting edge portion and the second rake surface of the second cutting edge portion.
The sinking groove is a through groove, and the sinking groove penetrates through two adjacent side surfaces of the blade body along the horizontal direction.
The sinking groove is a closed groove.
The blade body comprises a hard alloy matrix, a hard alloy substrate and a superhard material body, wherein the superhard material body is welded and fixed in the corresponding side surface of the hard alloy matrix through the hard alloy substrate in the side surface corresponding to the cutting edge part; the center hole is arranged on the hard alloy substrate.
Compared with the prior art, the invention has the beneficial effects that:
1. In the invention, as the cutting edge part and the sinking groove which are formed on the superhard material body in a laser processing mode are arranged on at least one of the four side surfaces of the blade body; the cutting edge portion is defined by a first rake surface, a second rake surface, a side surface, and an upper surface or a lower surface. The structure of the invention is characterized in that the sinking groove is processed on the superhard material body, so that safe and reliable clamping can be realized, the positioning is more accurate, and the unprocessed cutting edge part can be effectively protected; the design of the first rake face and the rake angle can effectively reduce cutting resistance, guide the flow direction of chips and improve the processing stability; the superhard material is combined with the wear-resistant characteristic of the superhard material, so that the superhard blade can effectively overcome the current situation that the quality of the processed surface of the existing superhard three-edge milling blade is poor in processing, reduce the cutting force, realize the efficient and stable cutting of the superhard three-edge milling blade, and has the characteristics of better physical and mechanical properties, long service life of the cutter and better processing stability.
2. The invention adopts the structure that the sinking groove is arranged between the second rake surface of the first cutting edge part and the second rake surface of the second cutting edge part, and the sinking groove is lower than the second rake surface of the first cutting edge part and the second rake surface of the second cutting edge part. The structure ensures the positioning precision of the blade during the installation through the design of the sinking groove lower than the second front cutter surface; the sinking groove not only plays a role in positioning, but also plays a role in avoiding empty, so that chips can be smoothly discharged and cannot be beaten on a positioning surface, and the precision in positioning and assembling is affected; due to the design of the rake angle, the cutting force can be greatly reduced, and the resistance generated by the cutting chips flowing through the rake surface is small; the design of the first front cutter surface also effectively enhances the cutter tip strength.
The invention is described in further detail below with reference to the drawings and examples; the superhard three-edged milling insert of the invention is not limited to the embodiments shown.
Drawings
FIG. 1 is a schematic perspective view of a first embodiment of the present invention;
fig. 2 is a front view of a first embodiment of the present invention;
FIG. 3 is a left side view (rotated 90 degrees) of an embodiment of the invention;
FIG. 4 is a top view of a first embodiment of the invention;
FIG. 5 is a cross-sectional view taken along line A-A of FIG. 4;
FIG. 6 is an enlarged partial schematic view (rotated 90 degrees) of a first embodiment of the present invention;
fig. 7 is a schematic perspective view of a second embodiment of the present invention.
In the figure: 1. a blade body; 2. an upper surface; 3. a lower surface; 4. a side surface of the blade body; 5. a cutting edge portion; 6. sinking grooves; 7. a central bore; 8. a cemented carbide substrate; 9. a cemented carbide substrate; 10. a body of superhard material; 51. a first rake surface; 52. a second rake surface; 53. a side surface of the cutting edge portion; 54. a first cutting edge portion; 55. a second cutting edge portion.
Detailed Description
Example 1
Referring to fig. 1 to 6, a superhard three-edged milling insert of the present invention comprises an insert body 1; the blade body 1 has an upper surface 2, a lower surface 3 and a side surface 4 connecting between the upper and lower surfaces; a center hole 7 penetrating through the upper and lower surfaces is formed in the center of the blade body 1 along the thickness direction of the blade body; the projection of the blade body 1 on a plane is in a shape of a substantially parallelogram; of the four side surfaces of the blade body 1, at least one side surface is provided with a cutting edge part 5 and a countersink 6 which are formed on the superhard material body by a laser processing mode; the cutting edge 5 is defined by a first rake surface 51, a second rake surface 52, side surfaces 53 and an upper surface 2 or a lower surface 3. The superhard material may be PCBN (polycrystalline cubic boron nitride) or PCD (polycrystalline diamond). The cutting edge part 5 made of superhard material can control cutting chips, so that the cutting force is effectively reduced; the sink groove 6 plays a role in positioning and avoiding chips; the sinking groove 6 is engraved by laser, so that the problem of product deformation inherent to the production mode of die pressing and sintering molding can be effectively solved, and good positioning precision is ensured.
In this embodiment, among the four sides of the insert body 1, two opposite sides are respectively provided with a cutting edge portion 5 and a countersink 6 formed on the superhard material body by laser processing, and the other two opposite sides 4 are flank surfaces. The present embodiment is a double sided superhard three-edged milling insert. Of course, of the four side surfaces of the insert body, only one side surface may be provided with a cutting edge portion and a countersink formed in the superhard material body by laser machining, and the superhard three-edge milling insert may be one-sided.
In this embodiment, in the side surface provided with the cutting edge portion, the upper portion of the side surface is provided with the first cutting edge portion 54, the lower portion of the side surface is provided with the second cutting edge portion 55, the first cutting edge portion 54 is surrounded by the first rake surface 51, the second rake surface 52, the side surface 53 and the upper surface 2, the second cutting edge portion 55 is surrounded by the first rake surface 51, the second rake surface 52, the side surface 53 and the lower surface 3, and the first cutting edge portion 54 and the second cutting edge portion 55 are in a symmetrical structure with respect to the horizontal center line of the side surface. This configuration includes both left hand and right hand cutting edge portions, all of which are identical in shape and configuration and are uniformly distributed about the periphery of the blade body. This structure can solve the problem that both the left hand cutting edge portion and the right hand cutting edge portion are required in the three-edge milling process.
In this embodiment, the countersink 6 is disposed between the second rake surface 52 of the first cutting edge 54 and the second rake surface 52 of the second cutting edge 55, and the countersink 6 is lower than the second rake surface 52 of the first cutting edge and the second rake surface 52 of the second cutting edge. The invention adopts the design of the sinking groove, so that the bottom surface of the sinking groove 6 is lower than the second rake surface 52, the abrasion of the chips at the bottom of the sinking groove 6 in the high-speed sliding process can be effectively avoided, the bonding abrasion risk generated by the residual chips at the bottom of the sinking groove 6 and the risk of incapable installation caused by the bonding abrasion risk are reduced, the decline of the positioning precision is avoided, the interference between the cutter body and the second rake surface 52 can be avoided in the installation and the cooperation with the cutter body, and the function of protecting the unprocessed cutting edge part 5 at the same side is realized.
In this embodiment, the sinking groove 6 is a through groove, and the sinking groove 6 penetrates through two adjacent side surfaces of the blade body along the horizontal direction.
In this embodiment, the insert body 1 comprises a cemented carbide base body 8, a cemented carbide substrate 9 and a cemented carbide body 10, the cemented carbide body 10 being welded by the cemented carbide substrate 9 in a corresponding side face of the cemented carbide base body 8 in a side face corresponding to the side face provided with the cutting edge portion; the central hole 7 is provided in the cemented carbide substrate 8. The superhard material body 10 and the lower hard alloy substrate 9 are sintered at high temperature and high pressure, and then are combined with the hard alloy matrix 8 in a welding mode.
The superhard three-edge milling blade adopts the structure that at least one side surface of four side surfaces of a blade body 1 is provided with a cutting edge part 5 and a countersink 6 which are formed on a superhard material body in a laser processing mode; the cutting edge 5 is defined by a first rake surface 51, a second rake surface 52, side surfaces 53 and an upper surface 2 or a lower surface 3. The structure of the invention is characterized in that the sinking groove 6 is processed on the superhard material body 10, so that safe and reliable clamping can be realized, and the positioning is more accurate and the unprocessed cutting edge part can be effectively protected; the design of the first rake face and the rake angle can effectively reduce cutting resistance, guide the flow direction of chips and improve the processing stability; the superhard material is combined with the wear-resistant characteristic of the superhard material, so that the superhard blade can effectively overcome the current situation that the quality of the processed surface of the existing superhard three-edge milling blade is poor in processing, reduce the cutting force, realize the efficient and stable cutting of the superhard three-edge milling blade, and has the characteristics of better physical and mechanical properties, long service life of the cutter and better processing stability.
In the superhard three-sided milling insert of the present invention, a countersink 6 is provided between the second rake surface 52 of the first cutting edge portion 54 and the second rake surface 52 of the second cutting edge portion 55, and the countersink 6 is lower than the second rake surface 52 of the first cutting edge portion 54 and the second rake surface 52 of the second cutting edge portion 55. The structure ensures the positioning precision of the blade during the installation through the design of the sinking groove 6 lower than the second front cutter surface; the sinking groove 6 not only plays a role in positioning, but also plays a role in avoiding empty, so that chips can be smoothly discharged and cannot be beaten on a positioning surface, and the precision in positioning and assembling is affected; due to the design of the rake angle, the cutting force can be greatly reduced, and the resistance generated by the cutting chips flowing through the rake surface is small; the design of the first front cutter surface also effectively enhances the cutter tip strength.
Example two
Referring to fig. 7, the superhard three-edge milling insert of the present invention is different from the first embodiment in that the countersink 6 is a closed groove.
The foregoing is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. While the invention has been described with reference to preferred embodiments, it is not intended to be limiting. Many possible variations and modifications of the disclosed technology can be made by anyone skilled in the art, or be modified to equivalent embodiments, without departing from the scope of the technology. Therefore, any simple modification, equivalent variation and modification of the above embodiments according to the technical substance of the present invention shall fall within the scope of the technical solution of the present invention.
Claims (4)
1. A superhard three-sided milling insert comprises an insert body; the blade body has an upper surface, a lower surface and a side surface connecting the upper and lower surfaces; a center hole penetrating through the upper surface and the lower surface is arranged in the center of the blade body along the thickness direction of the blade body; the projection of the blade body on the plane is in a shape of a parallelogram; the method is characterized in that: at least one of the four side surfaces of the blade body is provided with a cutting edge part and a sinking groove which are formed on the superhard material body in a laser processing mode; the cutting edge part is surrounded by a first rake surface, a second rake surface, a side surface and an upper surface or a lower surface; the upper part of the side surface is provided with a first cutting edge part, the lower part of the side surface is provided with a second cutting edge part, and the first cutting edge part and the second cutting edge part are in symmetrical structures relative to the horizontal center line of the side surface; the countersink is arranged between the second rake surface of the first cutting edge part and the second rake surface of the second cutting edge part and is lower than the second rake surface of the first cutting edge part and the second rake surface of the second cutting edge part; the sinking groove is a through groove, and the sinking groove penetrates through two adjacent side surfaces of the blade body along the horizontal direction, or the sinking groove is a closed groove.
2. The superhard three-edged milling insert of claim 1, wherein: of the four sides of the blade body, only one side is provided with a cutting edge portion and a countersink formed on the superhard material body by means of laser machining.
3. The superhard three-edged milling insert of claim 1, wherein: among the four sides of the blade body, two opposite sides are respectively provided with a cutting edge part and a sink groove which are formed on the superhard material body in a laser processing mode.
4. A superhard three-edged milling insert according to claim 1 or 2 or 3, wherein: the blade body comprises a hard alloy matrix, a hard alloy substrate and a superhard material body, wherein the superhard material body is welded and fixed in the corresponding side surface of the hard alloy matrix through the hard alloy substrate in the side surface corresponding to the cutting edge part; the center hole is arranged on the hard alloy substrate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911395769.7A CN113118528B (en) | 2019-12-30 | 2019-12-30 | Superhard three-sided edge milling blade |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911395769.7A CN113118528B (en) | 2019-12-30 | 2019-12-30 | Superhard three-sided edge milling blade |
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| CN113118528A CN113118528A (en) | 2021-07-16 |
| CN113118528B true CN113118528B (en) | 2024-07-02 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN211727649U (en) * | 2019-12-30 | 2020-10-23 | 厦门金鹭特种合金有限公司 | Superhard three-edge milling blade |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5098353B2 (en) * | 2007-02-15 | 2012-12-12 | 株式会社タンガロイ | Throw-away insert and throw-away type rolling tool using the same |
| CN101234438A (en) * | 2008-02-29 | 2008-08-06 | 刘�英 | Straight channel and spiral cut milling cutter of hook angle structure |
| CN101837485A (en) * | 2010-05-24 | 2010-09-22 | 株洲钻石切削刀具股份有限公司 | Milling blade, milling cutter and installation method for milling cutter |
| CN104889466A (en) * | 2015-06-11 | 2015-09-09 | 山东大学 | Integral full-ceramic super dense-tooth three-edge milling cutter and manufacturing method thereof |
| CN205816840U (en) * | 2016-06-29 | 2016-12-21 | 厦门金鹭特种合金有限公司 | Turning/milling cutter blade for processing high-hardness steel special-shaped piece |
| CN205834330U (en) * | 2016-08-05 | 2016-12-28 | 哈尔滨第一工具制造有限公司 | Alternately waveform eight sword vertical dress indexable insert tip, throw away tip |
| CN206605048U (en) * | 2017-01-18 | 2017-11-03 | 威海威硬工具股份有限公司 | Strength interrupted cut ultra-hard composite blade |
| CN208613850U (en) * | 2018-06-11 | 2019-03-19 | 上海电气电站设备有限公司 | A kind of blade root kerve profile milling cutter |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN211727649U (en) * | 2019-12-30 | 2020-10-23 | 厦门金鹭特种合金有限公司 | Superhard three-edge milling blade |
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| CN113118528A (en) | 2021-07-16 |
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