CN209867496U - Lengthened PCD spiral blade end milling cutter - Google Patents
Lengthened PCD spiral blade end milling cutter Download PDFInfo
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- CN209867496U CN209867496U CN201920175221.0U CN201920175221U CN209867496U CN 209867496 U CN209867496 U CN 209867496U CN 201920175221 U CN201920175221 U CN 201920175221U CN 209867496 U CN209867496 U CN 209867496U
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- pcd
- handle
- cutting edge
- angle
- blade
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Abstract
The utility model discloses an elongated PCD spiral sword end mill, including a handle of a knife, there are two blade grooves at the front end circumference equipartition of handle of a knife, have welded PCD composite blade in each blade groove be provided with the cutting edge on the PCD composite blade, a serial communication port, the axial anterior angle gamma of cutting edgeP5 to 10 DEG, a front angle gamma o of the orthogonal section of 0 to 11 DEG, and a rear angle alpha of the orthogonal sectionO4-10 degrees, the end edge oblique angle psi is 0.1-2 degrees, and the arc radius R of the tool nose is 0.1-0.6 mm; actual helix angle betaeThen the diameter phi of the cutting edge, the sharpening rotation angle theta of the machine tool and the length L2 of the cutting edge are calculated, and the specific formula is as follows: β e ═ tg-1(π d θ/L2 × 360 °). The beneficial effects of the utility model reside in that: processing is bigIn the middle of the operating mode of side and bottom surface, processingquality is good, and the cutter is longe-lived, and the tool changing time reduces, and production efficiency is high, and processingquality is stable, and reduction in production cost is showing.
Description
Technical Field
The utility model belongs to end mill field, concretely relates to lengthened PCD spiral sword end mill.
Background
In the modern manufacturing fields of aerospace, automobiles, medical instruments, photoelectrons, computers, sensors, precision machinery, radars, optics, molds, communication and the like, large-size (generally more than or equal to 20mm, and sometimes about 40-45 mm) cutting processing of side surfaces and bottom surfaces is often encountered, the requirements on the roughness of the side surfaces and the bottom surfaces are high, and the processing on difficult-to-process materials such as GFRP, CFRP, MMC, FRM (SiC/AL), titanium alloy, aluminum alloy, titanium-aluminum alloy and the like is very difficult.
The conventional coated hard alloy end milling cutter commonly used at present is used for processing large side surfaces and bottom surfaces, and has the main defects of quick abrasion, short service life, poor precision, low efficiency and high cost.
The PCD material is a polycrystalline diamond material which forms diamond microcrystals under high temperature (1560 ℃) and high pressure (16GPa) and is sintered into a whole by bonding metal Co, Ni and the like, the hardness can reach HV 6000-8000, the heat resistance can reach about 700-800 ℃, the allowable cutting speed on a machining center is 3-10 times higher than that of hard alloy, the abrasion of the hard alloy end mill is much slower when the hard alloy composite material which is non-metal and non-ferrous metal is cut, and the durability of a cutter can be improved by 5-10 times. However, the PCD is pressed and sintered into a wafer shape, the diameter is generally about 60-80 mm, the rake face is a plane, and the PCD is difficult to be made into a spiral face due to high hardness.
SUMMERY OF THE UTILITY MODEL
In order to overcome the problems in the prior art, the utility model aims to provide an extended PCD helical blade end mill.
In order to realize the utility model discloses an aim, the technical scheme who adopts is:
the lengthened PCD spiral edge end milling cutter comprises a cutter handle, wherein two blade grooves are uniformly distributed at the front end of the cutter handle in the circumferential direction, a PCD composite blade is welded in each blade groove, and a cutting edge is arranged on the PCD composite bladeP5 to 10 DEG, a front angle gamma o of the orthogonal section of 0 to 11 DEG, and a rear angle alpha of the orthogonal sectionO4-10 degrees, the end edge oblique angle psi is 0.1-2 degrees, and the arc radius R of the tool nose is 0.1-0.6 mm; actual helix angle betaeThen the diameter phi of the cutting edge, the sharpening rotation angle theta of the machine tool and the length L2 of the cutting edge are calculated, and the specific formula is as follows: β e ═ tg-1(π d θ/L2 × 360 °).
In a preferred embodiment of the invention, a chip removal groove is provided at the rear end in each insert pocket.
In a preferred embodiment of the present invention, the structure of the handle includes: any one of a straight handle, a Morse taper handle, a 7:24 taper handle and a HSK 1:10 short taper hollow handle.
In a preferred embodiment of the present invention, the material of the handle includes: any one of 42CrMo, 36CrMoTi and K10-K20 hard alloy.
In a preferred embodiment of the utility model, Ra of handle of a knife is less than or equal to 0.4 μm, and cylindricity is less than or equal to 2 ~ 3 μm.
In a preferred embodiment of the present invention, the PCD composite blade is a 25 μm coarse grain, a 10 μm medium grain or a 2 μm fine grain PCD composite blade.
The beneficial effects of the utility model reside in that:
(1) the utility model discloses after forming axial anterior angle gamma p, the cutting edge has inclined gamma p angle, can solve the helix of cutting edge with the method of numerical value fitting, also can become a helix after the sharpening by automatic fitting behind machine tool software numerical value operation on numerical control sharpedge grinding machine (for example British COBORN-RG9 sharpedge grinding machine).
(2) The utility model can be applied to various knife handle structures (straight handle, 7:24 taper handle, Morse taper handle and HSK high-speed cutting knife handle, etc.) to meet the needs of various machine tool main shaft interfaces;
(3) the utility model can be designed and manufactured into a right-handed blade or a left-handed blade according to the use requirement, thereby ensuring smooth chip removal;
(4) the PCD material of the utility model can select proper PCD diamond grain diameter according to the physical and mechanical properties of the workpiece, such as hardness, strength, toughness, heat conductivity coefficient, etc.;
(5) the geometric parameters of the utility model can be reasonably designed according to the material of the workpiece, and the seven-axis numerical control five-axis linkage British COBORN-RG9 software supports the processing;
(6) the utility model discloses many cutting edge sharpenings can be accomplished to a clamping, and the cutting edge is beated for a short time.
(7) The utility model can cut and process titanium alloy, aluminum and its alloy, copper and its alloy, GFRP (glass fiber reinforced material), CFRP (carbon fiber composite material), MMC (metal matrix composite material), FRM (fiber reinforced metal, such as SiC/Al, Al2O 3/Al) and other difficult-to-process materials;
(8) the utility model can be applied to a machining center and a combined machine tool with enough rigidity and large torque;
(9) the utility model has the advantages that the cutting edge is gradually cut in and cut out, the cutting is stable, and the processing quality is good;
(10) the axial gap or the intermittent side plane or the intermittent curved surface of the part can be processed;
(11) the roughness Ra of the machined surface of the workpiece is less than or equal to 0.4 mu m;
(12) the cutter has long service life, short cutter changing time, high production efficiency, stable processing quality and obvious production cost reduction.
Drawings
Fig. 1 is a schematic structural view (front view) of the present invention.
Fig. 2 is a schematic structural view (rear view) of the present invention.
Fig. 3 is a schematic structural diagram (left side view) of the present invention.
Fig. 4 is an enlarged schematic view of the end blade of the present invention.
Detailed Description
The parameters in fig. 1-4 are referred to as follows:
axial rake angle gammaPActual helix angle betaeRadial rake angle gammafOrthogonal section front angle γ o and orthogonal section rear angle αOEnd edge bevel psi, end edge relief angle alphaodAnd the circular arc radius R of the tool nose.
The main principle of the utility model lies in:
the PCD material is a polycrystalline diamond material which forms diamond microcrystals under high temperature (1560 ℃) and high pressure (16GPa) and is formed by bonding and sintering metal Co, Ni and the like into a whole, the hardness can reach HV 6000-8000, the heat resistance can reach about 700-800 ℃, the allowable cutting speed on a machining center is 3-10 times higher than that of hard alloy, the abrasion of the hard alloy end mill is much slower when the hard alloy composite material which is non-metal and non-ferrous metal is cut, and the durability of a cutter can be improved by 5-10 times.
However, the PCD is pressed and sintered into a wafer shape, the diameter is generally about 60-80 mm, the rake face is a plane, and the PCD is difficult to be made into a spiral face due to high hardness. Therefore, the utility model discloses after forming axial anterior angle gamma p, the cutting edge has inclined gamma p angle in order to reach the structural design of helical cutter head.
The invention is further described by the following detailed description in conjunction with the accompanying drawings:
referring to fig. 1-4, a polycrystalline diamond helical-edge end mill is shown, comprising:
in the tool holder 200, two insert grooves 210a and 210b are uniformly distributed in the circumferential direction at the front end of the tool holder 200, and a chip discharge groove 211a (the other side is not shown) is provided at the rear end in each of the insert grooves 210a and 210 b.
PCD composite inserts 100a, 100b are welded in each insert pocket 210a, 210b, and cutting edges 110a, 110b are provided on the PCD composite inserts 100a, 100 b.
The cutting edges 110a, 110b of the PCD composite blades 100a, 100b have an axial rake angle of 5-10 degrees, an orthogonal section rake angle of 0-11 degrees, an orthogonal section relief angle of 4-10 degrees, an end edge bevel angle of 0.1-2 degrees, and a nose arc radius of 0.1-0.6 mm. By adopting the combination of the angles, the machining precision of the spiral blade can be effectively improved, a workpiece with higher precision can be machined, the machining efficiency is further improved, and the machining cost is reduced.
The helix angle β e in practical use is calculated from the diameter of the cutting edge, the sharpening rotation angle θ of the machine tool and the length L2 of the cutting edge.
According to the principle of spiral line formation, the following steps are provided: the RG9 machine tool rotates by an angle theta when being sharpened, the axial length of the cutting edge is L2, and the lead P of the spiral cutting edge obtained by fitting the machine tool is as follows:
P＝L2×360°/θ
the actual helix angle β e is found:
βe＝tg-1(πdθ/L2×360°)
the material of the helical edges 120 of the PCD composite inserts 100a, 100b is polycrystalline diamond with coarse grains (25 μm), medium grains (10 μm) or fine grains (2 μm), as determined by the hardness and strength of the workpiece material.
The structure of the tool shank 200 includes the following four types:
a straight shank;
a Morse taper shank;
7:24 taper shank;
HSK 1:10 short-cone hollow handle;
according to different cutting scenes and hardness requirements, different materials of the tool shank 200 can be selected, such as: the large-diameter cutting edge (d is more than or equal to 25), the handle can be made of 42CrMo, 36CrMoTi and other alloy structural steels, but the hardness of the cutting edge is more than or equal to 42-45 HRC after heat treatment and quenching; the diameter d of the cutting edge is less than or equal to 25, and the cutting edge can be made of K10-K20 hard alloy according to the use requirement.
In order to further ensure the groove shapes and the precision of the chip grooves 211 and the blade grooves 210, Ra of the tool holder 200 is less than or equal to 0.4 mu m, and the cylindricity is less than or equal to 2-3 mu m.
Due to the adoption of the structure, the utility model has the following characteristics:
1. the structure is characterized in that:
the lengthened polycrystalline diamond (PCD) spiral blade end mill can be suitable for various tool shank structures (straight shank, 7:24 taper shank, Morse taper shank, HSK high-speed cutting tool shank and the like) so as to meet the requirements of various machine tool spindle interfaces; the lengthened polycrystalline diamond (PCD) spiral blade end mill can be designed and manufactured into a right-handed blade or a left-handed blade according to the use requirement, so that smooth chip removal is ensured;
the PCD material of the lengthened polycrystalline diamond (PCD) spiral blade end mill can select proper PCD diamond grain diameter according to the physical and mechanical properties of the workpiece, such as hardness, strength, toughness, heat conductivity coefficient and the like;
the geometric parameters of the lengthened polycrystalline diamond (PCD) spiral edge end mill can be reasonably designed according to workpiece materials, and the machining is supported by seven-axis numerical control five-axis linkage British COBORN-RG9 software;
the lengthened polycrystalline diamond (PCD) spiral edge end mill can finish the sharpening of a plurality of cutting edges by one-time clamping, and the cutting edges have small jump.
2. The application characteristics are as follows:
can cut and process difficult-to-process materials such as titanium alloy, aluminum and its alloy, copper and its alloy, GFRP (glass fiber reinforced plastics), CFRP (carbon fiber composite), MMC (metal matrix composite), FRM (fiber reinforced metal, such as SiC/Al, Al2O 3/Al) and the like;
the device can be applied to machining centers and combined machines with enough rigidity and large torque;
the cutting edge gradually cuts in and cuts out, the cutting is stable, and the processing quality is good; the axial gap or the intermittent side plane or the intermittent curved surface of the part can be processed;
the roughness Ra of the machined surface of the workpiece is less than or equal to 0.4 mu m;
the cutter has long service life, short cutter changing time, high production efficiency, stable processing quality and obvious production cost reduction.
Claims (6)
1. The lengthened PCD spiral edge end milling cutter comprises a cutter handle, wherein two blade grooves are uniformly distributed at the front end of the cutter handle in the circumferential direction, a PCD composite blade is welded in each blade groove, and a cutting edge is arranged on the PCD composite bladeP5 to 10 DEG, a front angle gamma o of the orthogonal section of 0 to 11 DEG, and a rear angle alpha of the orthogonal sectionO4-10 degrees, the end edge oblique angle psi is 0.1-2 degrees, and the arc radius R of the tool nose is 0.1-0.6 mm; actual helix angle betaeThen the diameter phi of the cutting edge, the sharpening rotation angle theta of the machine tool and the length L2 of the cutting edge are calculated, and the specific formula is as follows: β e ═ tg-1(π d θ/L2 × 360 °).
2. An elongated PCD helical end mill according to claim 1, wherein a flute is provided at the rear end of each insert pocket.
3. An elongated PCD helical edge end mill according to claim 1, wherein the shank is of a construction comprising: any one of a straight handle, a Morse taper handle, a 7:24 taper handle and a HSK 1:10 short taper hollow handle.
4. An elongated PCD helical cutting end mill according to claim 1, wherein the shank comprises a material comprising: any one of 42CrMo, 36CrMoTi and K10-K20 hard alloy.
5. An elongated PCD helical edge end mill according to claim 1, wherein the shank has an Ra of 0.4 μm or less and a cylindricity of 2 to 3 μm or less.
6. An elongated PCD helical edge end mill according to claim 1, wherein the PCD composite insert is a 25 μm coarse grain, a 10 μm medium grain or a 2 μm fine grain PCD composite insert.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920175221.0U CN209867496U (en) | 2019-01-31 | 2019-01-31 | Lengthened PCD spiral blade end milling cutter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920175221.0U CN209867496U (en) | 2019-01-31 | 2019-01-31 | Lengthened PCD spiral blade end milling cutter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209867496U true CN209867496U (en) | 2019-12-31 |
Family
ID=68952372
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920175221.0U Expired - Fee Related CN209867496U (en) | 2019-01-31 | 2019-01-31 | Lengthened PCD spiral blade end milling cutter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209867496U (en) |
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2019
- 2019-01-31 CN CN201920175221.0U patent/CN209867496U/en not_active Expired - Fee Related
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20191231 Termination date: 20210131 |