CN212665005U - Ball end milling cutter - Google Patents
Ball end milling cutter Download PDFInfo
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- CN212665005U CN212665005U CN202021450632.5U CN202021450632U CN212665005U CN 212665005 U CN212665005 U CN 212665005U CN 202021450632 U CN202021450632 U CN 202021450632U CN 212665005 U CN212665005 U CN 212665005U
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Abstract
The utility model relates to a ball-end milling cutter relates to milling cutter technical field for the machining, including the hilt portion and the portion of milling, the portion of milling includes the week sword that a plurality of heliciform set up, and week sword extends to the bulb portion position of the portion of milling tip, is provided with the sword groove between the adjacent week sword, and the sword groove is the heliciform along week sword, and the sword groove is equipped with the tapering along the screw direction, and the core footpath that mills the portion increases from bulb portion position to handle of a knife portion in proper order, arranges along the unequal contained angle of circumference that mills the portion between a plurality of week sword. The method and the device can solve the technical problems that resonance is easily generated, the processing quality of a workpiece is influenced and the cutting capability is low in the process of processing the turbine blade in the prior art, and achieve the effects of improving the cutting performance and the processing quality.
Description
Technical Field
The application relates to the technical field of milling cutters for machining, in particular to a ball end milling cutter.
Background
The turbine blade is a key part of the turbine and is one of the finest and most important parts. It is subjected to the combined action of high temperature, high pressure, huge centrifugal force, steam exciting force, corrosion and vibration and water drop erosion in a wet steam area under extremely severe conditions. The geometry and surface roughness of the turbine blades are therefore very demanding.
The machining of steam turbine blade generally adopts ball end mill, and the material of steam turbine blade generally adopts nickel base alloy, titanium alloy, and material hardness is higher, when carrying out a large amount of cutting, can produce resonance, cutting ability reduction between cutter and the work piece, and resonance can influence the processingquality on work piece surface, leads to unable improvement process velocity after producing resonance to can reduce the life of cutter after producing resonance.
In view of the above-mentioned related technologies, the inventor believes that when a common ball end mill is used for machining a turbine blade, resonance is easily generated, the cutting capability is poor, the surface quality of a workpiece is affected, the machining speed is reduced, and the service life of a cutter is shortened.
SUMMERY OF THE UTILITY MODEL
In order to improve the problem that the ball end mill easily produces resonance, influences work piece processingquality and cutting ability low among the ball end mill processing steam turbine blade process, this application provides a ball end mill.
The application provides a ball-end milling cutter adopts following technical scheme:
ball end milling cutter, including the hilt portion and the portion of milling, the portion of milling includes the week sword that a plurality of heliciform set up, week sword extends to the bulb portion position of the portion tip of milling, it is adjacent be provided with the sword groove between the week sword, the sword groove is followed week sword is the heliciform, the sword groove is equipped with the tapering along the helical direction, the core footpath of the portion of milling increases in proper order to handle of a knife portion from bulb portion position, and is a plurality of follow between the week sword the unequal contained angle of circumference of the portion of milling arranges.
By adopting the technical scheme, the 4 peripheral edges are arranged in an asymmetric circumferential manner, the 4 peripheral edges divide the milling part in a circumferential 360-degree unequal manner, and included angles formed between the adjacent peripheral edges are unequal, so that the peripheral edges are complementary in pairs, the staggered cutting performance of the peripheral edges is improved, the stress balance in the cutting process is facilitated, the stress of the milling part and the surface of a workpiece is more uniform and stable, the resonance between the cutter and the workpiece is reduced, and the cutting performance of the cutter is improved; in addition, in the process that the cutter groove extends downwards from the head part to the side periphery part, the cutter groove is provided with taper, namely the core diameter of the milling part is gradually increased, and the whole outer part of the milling part is tapered, so that the design improves the rigidity of the cutter and can improve the chip removal performance; the asymmetric design of the peripheral edge is combined with the taper design of the core diameter of the peripheral edge, so that the stress between the cutter and the workpiece is more stable, resonance is reduced, the cutting performance of the cutter is improved, and the surface processing quality of the workpiece is improved.
Preferably, the milling part further comprises an end edge located at the ball head part; the number of the end edges is consistent with that of the peripheral edges, and the end edges are located between the adjacent peripheral edges.
Through adopting above-mentioned technical scheme, the bulb position at milling portion increases and sets up the end sword, sets up an end sword between two adjacent week swords, and the end sword is located the foremost at bulb position, when cutting processing, guarantees that milling portion front end has sufficient sharpness, uses with week sword cooperation, can promote the cutting performance of cutter, and then improves workpiece surface processingquality.
Preferably, the rake face angle of the end edge is 3 ° -4 °, and the cutting angle of the end edge is 2 ° -3 °.
Through adopting above-mentioned technical scheme, the sharpness of end sword can be guaranteed to the parameter design of the rake face angle of above-mentioned end sword and cutting angle to guarantee simultaneously that the end sword has certain rigidity and intensity, make cutting process atress balanced, the course of working is more steady, guarantees the processingquality on workpiece surface.
Preferably, the taper is 3 ° -5 °.
By adopting the technical scheme, the design of the taper is beneficial to enhancing the rigidity and the strength of the cutter, the resonance of the milling process of the milling part is improved, the processing process is more stable, and the processing quality of the surface of the workpiece is ensured.
Preferably, the number of the peripheral edges is 4, and the difference value of the included angles between the adjacent peripheral edges is-5 degrees to +5 degrees.
Through adopting above-mentioned technical scheme, the design of the contained angle between the week sword for two liang of complemental in-process of week sword at the cutting, balanced atress reduces resonance, and the difference between the contained angle is between 5, and complemental, balanced atress effect is best between the week sword.
Preferably, the helix angle of the peripheral edge is from 30 ° to 40 °.
By adopting the technical scheme, the design of the angle parameters of the spiral angle of the peripheral edge is favorable for ensuring the sharpness and the cutting performance of the peripheral edge, and is favorable for chip removal and ensures the processing quality of the surface of a workpiece.
Preferably, the peripheral edge first relief angle of the peripheral edge is 9 ° -12 °; the secondary relief angle of the peripheral edge is 24 degrees to-30 degrees.
Through adopting above-mentioned technical scheme, the week sword is divided into the first week sword that is located the front portion and is located the second week sword at first week sword rear portion, week sword first relief angle is 9 ° -12 °, week sword second relief angle is 24 ° -30 °, above-mentioned angle parameter design can guarantee that week sword has sufficient sharpness, guarantee work piece surface machining quality, first week sword transitions to second week sword in addition, angle reasonable in design makes first week sword and second week sword complement each other, guarantees sufficient cutting performance.
Preferably, the knife groove rake face angle of the knife groove is 6 degrees to-9 degrees, and the knife groove flank angle of the knife groove is 8 degrees to-12 degrees.
Through adopting above-mentioned technical scheme, the parameter design of the preceding knife face angle in sword groove and back knife face angle can guarantee that the sword groove has sufficient holding power to week sword, strengthens structural rigidity, guarantees the sharpness and the cutting performance of week sword to make sword groove 3 have better chip removal performance, guarantee workpiece surface's processingquality.
Preferably, the edge width of the peripheral edge first relief angle is 30% to 45% of the edge width of the peripheral edge.
Through adopting above-mentioned technical scheme, the wide parameter design of sword of the first relief angle of week sword is favorable to improving the sharpness of week sword to guarantee the sufficient holding power of second week sword to first week sword, heighten the rigidity of week sword, guarantee that the cutter has higher cutting performance.
Preferably, the tool groove is provided with a groove back, the surface of the groove back positioned at the end part of the ball head part is provided with a tool tip clearance surface, and the height of the tool tip clearance surface is lower than that of the original groove back surface.
By adopting the technical scheme, the cutter point clearance surface is formed by grinding the surface of the groove back at the end part of the ball head part through a single procedure after the cutter groove is integrally formed, and the height of the cutter point clearance surface is less than that of the back surface of the original groove at the position; the design of the tool nose clearance surface is beneficial to improving the chip removal performance on one hand, and the peripheral edge of the ball head part has better supporting force on the other hand, thereby being beneficial to improving the cutting performance.
Drawings
Fig. 1 is a schematic structural diagram of a ball end mill provided in an embodiment of the present application;
fig. 2 is a schematic structural diagram of a ball head portion of a ball head milling cutter provided in an embodiment of the present application.
In the figure: 1. end blade, 2, knife tip clearance face, 3, knife groove, 4, peripheral blade, 5 and knife handle.
Detailed Description
The present application is described in further detail below with reference to figures 1-2.
The ball-end milling cutter disclosed in the embodiment of the present application, please refer to fig. 1-2 together, the ball-end milling cutter includes a shank 5 and a milling portion connected to one end of the shank 5, the milling portion is provided with a ball head portion and a side circumference portion at the end, the milling portion includes 4 circumferential edges 4 spirally arranged, the circumferential edges 4 extend from the side circumference portion of the milling portion to the ball head portion at the end of the milling portion, a cutter groove 3 is arranged between adjacent circumferential edges 4, the cutter groove 3 is spiral along the circumferential edges 4, the cutter groove 3 is also called as a spiral groove, the cutter groove 3 is provided with a taper along the spiral direction, namely, the core diameter of the milling part is sequentially increased from the ball head part to the cutter handle part 5, 4 peripheral edges 4 are arranged along the circumferential direction of the milling part at unequal included angles, that is, the included angles formed between the adjacent peripheral edges 4 are not equal, referring to fig. 2, the included angles formed between the adjacent peripheral edges 4 are a and β, respectively, and the values of a and β are not equal.
In the embodiment, the 4 peripheral edges 4 are arranged in an asymmetric circumferential manner, the 4 peripheral edges 4 divide the milling part in a circumferential direction by 360 degrees in an unequal manner, and included angles formed between the adjacent peripheral edges 4 are unequal, so that the peripheral edges 4 are complementary in pairs, the staggered cutting performance of the peripheral edges 4 is improved, the stress balance in the cutting process is facilitated, the stress of the milling part and the surface of a workpiece is more uniform and stable, the resonance between a cutter and the workpiece is reduced, and the cutting performance of the cutter is improved; in addition, in the process that the cutter groove 3 extends downwards from the ball head part to the side periphery part, the cutter groove 3 is provided with taper, namely the core diameter of the milling part is gradually increased, and the whole outer part of the milling part is in a taper shape, so that the design improves the rigidity of the cutter and can improve the chip removal performance; the asymmetric design of the peripheral edge 4 is combined with the taper design of the core diameter of the peripheral edge 4, so that the stress between the cutter and the workpiece is more stable, resonance is reduced, the cutting performance of the cutter is improved, and the surface processing quality of the workpiece is improved.
Referring to fig. 2, as a specific embodiment of the ball end mill provided by the present application, the milling portion further includes an end blade 1 located at the ball end portion; the number of the end edges 1 is equal to that of the peripheral edges 4, the number of the end edges 1 is 4, the end edges 1 are located between the adjacent peripheral edges 4, and the rear parts of the end edges 1 are connected to the peripheral edges 4.
In this embodiment, increase in the bulb position of milling portion and set up end sword 1, set up an end sword 1 between two adjacent week swords 4, end sword 1 is located the foremost in bulb position, when cutting process, guarantees that milling portion front end has sufficient sharpness, uses with week swords 4 cooperation, can promote the cutting performance of cutter, and then improves workpiece surface machining quality.
Referring to fig. 1-2 together, as a specific embodiment of the ball end mill provided in the present application, a rake surface angle of the end edge 1 is 3 ° -4 °, and a cutting angle of the end edge 1 is 2 ° -3 °.
In this embodiment, the design of the rake face angle of the end blade 1 and the cutting angle can ensure the sharpness of the end blade 1, and ensure that the end blade 1 has certain rigidity and strength, so that the stress in the cutting process is balanced, the machining process is more stable, and the machining quality of the surface of a workpiece is ensured.
As a specific implementation manner of the ball end mill provided in the present application, the taper is 3 ° -5 °, that is, the taper of the core diameter of the milling portion is 3 ° -5 °.
In the embodiment, the design of the taper is beneficial to enhancing the rigidity and the strength of the cutter, improving the resonance of the milling process of the milling part, and ensuring the processing quality of the surface of the workpiece, and the processing process is more stable.
Referring to fig. 2, as an embodiment of the ball nose milling cutter provided by the present application, a difference between the included angles of the adjacent peripheral edges 4 is-5 ° to +5 °, that is, a difference between the included angles a and β of the adjacent peripheral edges 4 is-5 ° to +5 °, and preferably, the included angles of the adjacent peripheral edges 4 are 89 °, 91 °, 89 °, and 91 ° in sequence.
The design of the contained angle between the week sword 4 among this embodiment for week sword 4 is two liang of complemental at the in-process of cutting, balanced atress, reduces resonance, and the difference between the contained angle is between 5, and the complemental, balanced atress effect is best between the week sword 4.
Referring to fig. 1, as an embodiment of the ball nose mill provided by the present application, the angle of the helix angle of the peripheral edge 4 is 30 ° to 40 °, preferably 35 °; the spiral angle of the cutter groove 3 is 30 degrees to-40 degrees.
The design of the helix angle parameter of the peripheral edge 4 in this embodiment is favorable for ensuring the sharpness and cutting performance of the peripheral edge 4, and is favorable for chip removal, thereby ensuring the processing quality of the surface of a workpiece.
Referring to fig. 1, as a specific embodiment of the ball end mill provided in the present application, a peripheral edge first relief angle of the peripheral edge 4 is 9 ° -12 °; the secondary relief angle of the peripheral edge 4 is 24 degrees to-30 degrees.
In this embodiment, the peripheral edge 4 is divided into a first peripheral edge located at the front and a second peripheral edge located at the rear of the first peripheral edge, the first peripheral edge clearance angle is 9 ° -12 °, the second peripheral edge clearance angle is 24 ° -30 °, and the angle parameter design can ensure that the peripheral edge 4 has sufficient sharpness and ensure the surface processing quality of a workpiece, and in addition, the first peripheral edge is transited to the second peripheral edge, and the angle design is reasonable, so that the first peripheral edge and the second peripheral edge supplement each other and ensure sufficient cutting performance.
Referring to fig. 1, as a specific embodiment of the ball end mill provided in the present application, a rake angle of the pocket 3 is 6 ° -9 °, and a flank angle of the pocket 3 is 8 ° -12 °.
The parameter design of the rake face angle and the flank face angle of the cutter groove 3 in this embodiment can ensure that the cutter groove 3 has sufficient supporting force for the peripheral blade 4, enhances the structural rigidity, ensures the sharpness and the cutting performance of the peripheral blade 4, enables the cutter groove 3 to have better chip removal performance, and ensures the processing quality of the workpiece surface.
As shown in fig. 1, as an embodiment of the ball end mill according to the present invention, the edge width of the peripheral edge first relief angle is 30% to 45% of the edge width of the peripheral edge 4, and the edge width of the peripheral edge first relief angle refers to the edge width of the first peripheral edge.
The wide parameter design of sword of the first relief angle of week sword in this embodiment is favorable to improving the sharpness of week sword 4 to guarantee that the second week sword is to the sufficient holding power of first week sword, heighten the rigidity of week sword 4, guarantee that the cutter has higher cutting performance.
Referring to fig. 1, as a specific embodiment of the ball end mill provided by the present application, a pocket 3 is provided with a pocket back, a tool nose clearance surface 2 is provided on a surface of the pocket back at an end of the ball end, and a height of the tool nose clearance surface 2 is lower than a height of an original pocket back surface.
The blade tip clearance surface 2 in this embodiment is formed by grinding the groove back surface at the end of the ball head part through a separate process after the integral molding of the blade groove 3, and the height of the blade tip clearance surface 2 is smaller than that of the original groove back surface; the design of the tool nose clearance surface 2 is beneficial to improving the chip removal performance on one hand, and the peripheral edge 4 of the ball head part has better supporting force on the other hand, thereby being beneficial to improving the cutting performance.
As a specific embodiment of the ball end mill provided by the present application, a surface of the milling portion is provided with a surface plating layer; the material of the surface coating adopts ultra-fine nano hard alloy.
In the embodiment, the surface of the milling part is additionally provided with the ultrafine nano hard alloy surface coating, so that the wear resistance and the durability of the milling part are enhanced, the anti-cracking performance of the cutting edge can be improved when a workpiece with higher hardness is machined, and the service life of the cutter is prolonged.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (10)
1. Ball end mill, including shank of a knife portion (5) and milling part, its characterized in that: milling portion includes all sword (4) that a plurality of heliciform set up, all sword (4) extend to the bulb portion position of milling portion tip is adjacent be provided with sword groove (3) between all sword (4), sword groove (3) are followed all sword (4) are the heliciform, sword groove (3) are equipped with the tapering along the screw direction, the core diameter of milling portion increases from bulb portion position to handle of a knife portion (5) in proper order, and is a plurality of follow between all sword (4) the unequal contained angle in circumference of milling portion arranges.
2. The ball nose mill of claim 1, wherein: the milling part also comprises an end edge (1) positioned at the ball head part; the number of the end blades (1) is consistent with that of the peripheral blades (4), and the end blades (1) are located between the adjacent peripheral blades (4).
3. The ball nose mill of claim 2, wherein: the rake face angle of the end edge (1) is 3 degrees to 4 degrees, and the cutting angle of the end edge (1) is 2 degrees to 3 degrees.
4. A ball nose milling cutter according to any one of claims 1-3, wherein: the taper is 3 degrees to 5 degrees.
5. The ball nose mill of claim 1, wherein: the number of the peripheral edges (4) is 4, and the difference value of included angles between every two adjacent peripheral edges (4) is-5 degrees to- +5 degrees.
6. The ball nose mill of claim 5, wherein: the angle of the helical angle of the peripheral edge (4) is 30-40 degrees.
7. The ball nose mill of claim 6, wherein: the first relief angle of the peripheral edge (4) is 9 degrees to 12 degrees; the secondary relief angle of the peripheral edge (4) is 24 degrees to-30 degrees.
8. The ball nose mill of claim 7, wherein: the knife groove front knife surface angle of the knife groove (3) is 6 degrees to 9 degrees, and the knife groove rear knife surface angle of the knife groove (3) is 8 degrees to 12 degrees.
9. The ball nose mill of claim 8, wherein: the edge width of the first relief angle of the peripheral edge is 30-45% of the edge width of the peripheral edge (4).
10. The ball nose mill of claim 1, wherein: the cutter groove (3) is provided with a groove back, the surface of the groove back positioned at the end part of the ball head part is provided with a cutter point clearance surface (2), and the height of the cutter point clearance surface (2) is lower than that of the surface of the groove back.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021450632.5U CN212665005U (en) | 2020-07-21 | 2020-07-21 | Ball end milling cutter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021450632.5U CN212665005U (en) | 2020-07-21 | 2020-07-21 | Ball end milling cutter |
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|---|---|
| CN212665005U true CN212665005U (en) | 2021-03-09 |
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| CN202021450632.5U Active CN212665005U (en) | 2020-07-21 | 2020-07-21 | Ball end milling cutter |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115464194A (en) * | 2022-08-23 | 2022-12-13 | 哈尔滨理工大学 | Asymmetric vibration reduction conical ball-end milling cutter for milling titanium alloy blade |
| CN116765489A (en) * | 2023-08-25 | 2023-09-19 | 长春工业大学 | Ball end milling cutter for inhibiting blade processing flutter |
| CN115464194B (en) * | 2022-08-23 | 2024-11-12 | 哈尔滨理工大学 | Asymmetric vibration reduction conical ball end milling cutter for milling titanium alloy blade |
-
2020
- 2020-07-21 CN CN202021450632.5U patent/CN212665005U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115464194A (en) * | 2022-08-23 | 2022-12-13 | 哈尔滨理工大学 | Asymmetric vibration reduction conical ball-end milling cutter for milling titanium alloy blade |
| CN115464194B (en) * | 2022-08-23 | 2024-11-12 | 哈尔滨理工大学 | Asymmetric vibration reduction conical ball end milling cutter for milling titanium alloy blade |
| CN116765489A (en) * | 2023-08-25 | 2023-09-19 | 长春工业大学 | Ball end milling cutter for inhibiting blade processing flutter |
| CN116765489B (en) * | 2023-08-25 | 2023-11-03 | 长春工业大学 | Ball end milling cutter for inhibiting blade processing flutter |
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Effective date of registration: 20210421 Address after: 215000 1st floor, No.9 factory building, Chuangtou industrial square, loufengbei District, Suzhou Industrial Park, Jiangsu Province Patentee after: Suzhou guanzuan precision tools Co.,Ltd. Address before: 200120 Shanghai City, Pudong New Area Chuansha New Town deer Ji Road No. 199--6 Patentee before: Shanghai Crown Diamond Precision Tool Co.,Ltd. |