CN109332775B - Inner-cooling three-edge milling cutter - Google Patents
Inner-cooling three-edge milling cutter Download PDFInfo
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- CN109332775B CN109332775B CN201811425890.5A CN201811425890A CN109332775B CN 109332775 B CN109332775 B CN 109332775B CN 201811425890 A CN201811425890 A CN 201811425890A CN 109332775 B CN109332775 B CN 109332775B
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- blade
- screw rod
- oil duct
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C5/00—Milling-cutters
- B23C5/28—Features relating to lubricating or cooling
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C5/00—Milling-cutters
- B23C5/16—Milling-cutters characterised by physical features other than shape
- B23C5/20—Milling-cutters characterised by physical features other than shape with removable cutter bits or teeth or cutting inserts
- B23C5/22—Securing arrangements for bits or teeth or cutting inserts
- B23C5/2204—Securing arrangements for bits or teeth or cutting inserts with cutting inserts clamped against the walls of the recess in the cutter body by a clamping member acting upon the wall of a hole in the insert
- B23C5/2208—Securing arrangements for bits or teeth or cutting inserts with cutting inserts clamped against the walls of the recess in the cutter body by a clamping member acting upon the wall of a hole in the insert for plate-like cutting inserts
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C2210/00—Details of milling cutters
- B23C2210/04—Angles
Abstract
The invention discloses an internal-cooling three-edge milling cutter, which comprises a cutter head, blades and a blade fastening assembly, wherein a plurality of chip grooves are uniformly distributed in the periphery of the cutter head, the blades are arranged in the chip grooves through the blade fastening assembly, the blade fastening assembly comprises a cutter holder, a pressing block and a screw rod, the pressing block and the cutter holder are arranged in the chip grooves and are mutually pressed against each other, the pressing block is fixed on the cutter head through the screw rod, the blades are fixed on the cutter holder through screws, a second oil duct axially penetrates through the inner part of the screw rod, the cutter head is provided with an annular groove, the second oil duct is communicated with the annular groove through a first oil duct, a plug pin is inserted at the outward end of the screw rod and is provided with an external thread, the screw rod is provided with an internal thread hole matched with the external thread, a third oil duct is arranged at one end of the plug pin, the third oil, the plug pin is locked on the screw rod through a locking nut. The invention has the advantages of good cooling effect and good quality of the processed surface.
Description
Technical Field
The invention relates to a metal cutting tool, in particular to an inner-cooling three-edge milling cutter.
Background
The three-edge milling cutter is mainly used for milling the grooves. When the groove is milled, the groove is sealed, external cooling liquid is extremely difficult to enter a machined part, so that heating is serious during milling, the service life of a blade is shortened, and the surface quality of a machined groove is poor. In order to solve the problem, an inner cooling technology is generally adopted, and a cooling liquid conveying cutter is directly used for cutting the cutting edge part through a cutter disc. Chinese patent document CN206455227U discloses a three-edge milling cutter with water guiding and cooling functions, which includes a cutter body, a through hole disc, and a water guiding groove. The cooling liquid can cool the cutter through the water guide groove. However, the invention has two defects, firstly, the cooling liquid is not aligned with the cutting edge, and the cooling effect is not good; the water chute is too long, which seriously weakens the strength of the cutter body and reduces the service life of the cutter.
Disclosure of Invention
The invention aims to solve the technical problem of overcoming the defects of the prior art and provides the internal-cooling three-edge milling cutter which is good in cooling effect, good in machining surface quality and long in service life.
In order to solve the technical problems, the invention adopts the following technical scheme:
an inner-cooling three-edge milling cutter comprises a cutter head, a blade and a blade fastening assembly, wherein the cutter head is provided with a plurality of chip grooves uniformly distributed along the circumferential direction, the blade is arranged in the chip grooves through the blade fastening assembly, the blade fastening assembly comprises a cutter holder, a pressing block and a screw rod, the pressing block and the cutter holder are arranged in the chip grooves, the pressing block and the cutter holder are mutually supported and pressed, the pressing block is fixed on the cutter head through external threads of the screw rod, the blade is fixed on the cutter holder through screws, an axial through second oil channel is arranged inside the screw rod, the cutter head is provided with a ring groove, the second oil channel is communicated with the ring groove through the first oil channel, one end of the screw rod facing outwards is inserted and provided with a blocking pin, the blocking pin is provided with external threads, the screw rod is provided with an internal thread hole matched with the external threads, one end of the blocking, the outer surface of the blocking pin is provided with a nozzle pointing to the blade, the nozzle is communicated with the third oil duct, and the blocking pin is locked on the screw rod through a locking nut.
As a further improvement of the above technical solution, preferably, an auxiliary nozzle pointing to the blade is provided on an outer surface of the outward end of the screw, the auxiliary nozzle is communicated with the second oil passage, and the auxiliary nozzle and the nozzle point to different cutting edges of the blade.
As a further improvement of the above technical solution, preferably, the external thread of the plug pin includes a first external thread and a second external thread with opposite turning directions, the first external thread is connected with the lock nut, and the second external thread is connected with the internal thread hole of the screw rod.
As a further improvement of the above technical solution, preferably, the plug pin is coaxial with the screw, and the third oil passage of the plug pin is coaxial with the second oil passage of the screw and coaxial with the screw.
As a further improvement of the technical scheme, preferably, an included angle is formed between the nozzle and the axis of the screw, and the included angle is 0-75 degrees.
As a further improvement of the technical scheme, preferably, an included angle is formed between the auxiliary nozzle and the axis of the screw, and the included angle is 0-75 degrees.
As a further improvement of the above technical solution, preferably, the third oil passage is a blind hole.
As a further improvement of the above technical solution, preferably, the outward end of the screw has a first counterbore, the internal threaded hole is a small hole of the first counterbore, and the small hole of the first counterbore is engaged with the second oil passage.
As a further improvement of the above technical solution, preferably, one end of the screw facing inward has a second counterbore, a small hole of the second counterbore has the same diameter as the second oil passage, a large hole of the second counterbore has a diameter smaller than the diameter of the screw, and the diameter of the first oil passage is larger than the diameter of the large hole of the second counterbore and smaller than the diameter of the screw.
In order to solve the technical problem, the invention adopts the following other technical scheme:
the utility model provides an interior cold trilateral sword milling cutter, includes blade disc, blade and blade fastening components, the blade disc is equipped with the chip groove of a plurality of equipartitions along circumference, the blade passes through blade fastening components to be installed in the chip groove, blade fastening components includes cutter holder, briquetting and screw rod, briquetting and cutter holder are established in the chip groove, and the two supports the pressure each other, and the external screw thread that the briquetting passes through the screw rod is fixed on the blade disc, the blade passes through the fix with screw on the cutter holder, the second oil duct is sealed in screw rod one end outwards, the blade disc is equipped with the annular, the second oil duct is through first oil duct and annular intercommunication, and the surface of screw rod one end outwards has the supplementary spout of directional blade, supplementary spout and second oil duct intercommunication.
Compared with the prior art, the invention has the advantages that:
(1) according to the internal-cooling three-edge milling cutter, when the blade is machined into the groove, the blade can enter the groove, and the blocking pin can enter the groove along with the blade, so that the nozzle can cool the blade machined in the groove, and the cooling effect of the blade is greatly improved; the blocking pin is in threaded connection with the screw rod, so that the axial direction, the height and the radial angle (pointing to different positions of the blade) of the nozzle can be realized only by rotating the blocking pin, and the locking nut is arranged on the blocking pin, so that the danger that the blocking pin is stressed to fall off in the using process can be prevented, and the nozzle position of the blocking pin can be kept unchanged in the using process; the first oil duct, the second oil duct and the third oil duct are arranged in the same radial direction of the cutter head, the whole stroke is short, and cooling liquid can quickly reach the nozzle; compared with the prior art, the internal-cooling three-edge milling cutter only additionally adds the annular groove and the first oil duct on the cutter head, and the first oil duct is short, so that the strength of the cutter head is not obviously weakened, the vibration in machining is favorably reduced, the surface quality of parts is improved, and the service life of the cutter blade is prolonged; the invention can greatly improve the cooling effect of the three-edge milling cutter, thereby realizing the aims of improving the surface quality of the machined groove, prolonging the service life of the blade and reducing the machining cost.
(2) The inner-cooling three-edge milling cutter is characterized in that an auxiliary nozzle pointing to the blade is arranged on the outer surface of the outward end of the screw, and the auxiliary nozzle is communicated with the second oil duct. The auxiliary nozzle and the nozzle can cool different cutting edges of the blade, and the cooling efficiency of the blade is greatly improved.
Drawings
Fig. 1 is a schematic perspective exploded view of embodiment 1 of the present invention.
Fig. 2 is a schematic perspective view of embodiment 1 of the present invention.
Fig. 3 is a front view of embodiment 1 of the present invention.
Fig. 4 is an enlarged view at K of fig. 3.
FIG. 5 is a schematic view of the screw structure in example 1 of the present invention.
Fig. 6 is a schematic structural view of a plug pin according to embodiment 1 of the present invention.
The reference numerals in the figures denote:
1. a cutter head; 11. a chip pocket; 12. a ring groove; 13. a first oil passage; 2. a blade; 21. a screw; 3. a tool holder; 4. briquetting; 5. a screw; 501. a first counterbore; 502. a second counterbore; 51. a second oil passage; 52. an internally threaded bore; 53. an auxiliary spout; 6. blocking pins; 601. a first external thread; 602. a second external thread; 61. a third oil passage; 62. a spout; 7. and locking the nut.
Detailed Description
The invention is described in further detail below with reference to the figures and specific examples of the specification.
Example 1
As shown in fig. 1 to 6, the internal-cooling three-face cutter of the present embodiment includes a cutter head 1, a blade 2 and a blade fastening assembly, the cutter head 1 is provided with a plurality of uniformly distributed chip flutes 11 along a circumferential direction, the blade 2 is mounted in the chip flutes 11 through the blade fastening assembly, the blade fastening assembly includes a tool holder 3, a press block 4 and a screw 5, the press block 4 and the tool holder 3 are disposed in the chip flutes 11 and are pressed against each other, the press block 4 is fixed on the cutter head 1 through an external thread of the screw 5, the blade 2 is fixed on the tool holder 3 through a screw 21, a second oil passage 51 axially penetrating through is disposed inside the screw 5, the cutter head 1 is provided with an annular groove 12, the second oil passage 51 is communicated with the annular groove 12 through a first oil passage 13 disposed on the cutter head 1, a blocking pin 6 is inserted at an outward end of the screw 5, the blocking pin 6 has an external thread, the screw 5 has an internal, and the end surface of the end is provided with a third oil channel 61, the third oil channel 61 is communicated with the second oil channel 51, the outer surface of the blocking pin 6 is provided with a nozzle 62 pointing to the blade 2, the nozzle 62 is communicated with the third oil channel 61, and the blocking pin 6 is locked on the screw rod 5 through a locking nut 7. The ring groove 12, the first oil passage 13, the second oil passage 51, the third oil passage 61 and the nozzle 62 are sequentially communicated to form an internal cooling passage together. The cooling liquid in the ring groove 9 firstly enters the second oil passage 51 of the screw 5 through the first oil passage 13, then enters the third oil passage 61 of the blocking pin 6, and finally is sprayed onto the blade 2 through the nozzle 62 (shown as cooling lines a-b in fig. 3), so that the effects of lubricating and cooling the blade 2 are achieved. The nozzle 63 is specifically aimed at one of the cutting edges of the blade 2 to cool the cutting edge.
In actual cutting process, during blade 2 processing groove, can enter into inslot portion, stifled round pin 6 can follow blade 2 and enter into the inslot to spout 62 can cool off the blade 2 of inslot processing, thereby has improved the cooling effect of blade 2 greatly. The blocking pin 6 is in threaded connection with the screw rod 5, so that the axial direction, the height and the radial angle (pointing to different positions of the blade 2) of the nozzle 62 can be realized only by rotating the blocking pin 6, and the locking nut 7 is arranged on the blocking pin 6, so that the danger that the blocking pin 6 is stressed to fall off in the use process can be prevented, and the position of the nozzle 62 of the blocking pin 6 can be kept unchanged in the use process; the first oil channel 13, the second oil channel 51 and the third oil channel 61 are arranged in the same radial direction of the cutter head 2, the whole stroke is short, and the cooling liquid can quickly reach the nozzle 62. Compared with the prior art, the internal-cooling three-face-edge milling cutter only additionally adds the annular groove 12 and the first oil duct 13 on the cutter head 1, and the first oil duct 13 is short, so that the strength of the cutter head 1 is not obviously weakened, the internal-cooling three-face-edge milling cutter is beneficial to reducing vibration in machining, improving the surface quality of parts and prolonging the service life of blades. The invention can greatly improve the cooling effect of the three-edge milling cutter, thereby realizing the aims of improving the surface quality of the machined groove, prolonging the service life of the blade and reducing the machining cost.
In this embodiment, the outer surface of the outward end of the screw 5 is provided with an auxiliary nozzle 53 pointing to the blade 2, the auxiliary nozzle 53 is communicated with the second oil passage 51, the auxiliary nozzle 53 and the nozzle 62 point to different cutting edges of the blade 2 (a-c of a cooling circuit of the auxiliary nozzle 53 is shown in fig. 3), the auxiliary nozzle 53 and the nozzle 62 can cool the different cutting edges of the blade 2, and the cooling efficiency of the blade 2 is greatly improved. Based on the principle of adjusting the position of the nozzle 62, the injection position of the auxiliary nozzle 53 can be adjusted axially and radially by rotating the screw 5 (only fine adjustment is possible because the screw 5 is pressed against the pressing block 4).
In this embodiment, the external threads of the plug pin 6 include a first external thread 601 and a second external thread 602 with opposite rotation directions, the first external thread 601 is connected with the lock nut 7, and the second external thread 602 is connected with the internal thread hole 52 of the screw rod 5. The external thread is divided into two sections of threads with different screwing directions, so that when the thread between the blocking pin 6 and the internal thread hole 52 of the screw rod 5 is loosened under the impact of the cooling liquid, namely the blocking pin 6 has the tendency of separating from the internal thread hole 52, but because the threads of the locking nut 7 and the blocking pin 6 are opposite, when the blocking pin 6 and the internal thread hole 52 have the tendency of rotating in opposite directions, the locking nut 7 and the blocking pin 6 tend to rotate more and more tightly, the blocking pin 6 cannot separate from the screw rod 5, and the reliability and the safety of the whole are improved.
In the present embodiment, the stopper pin 6 is coaxial with the screw 5, and the third oil passage 61 of the stopper pin 6 is coaxial with the second oil passage 51 of the screw 5 and coaxial with the screw 5. An included angle is formed between the nozzle 62 and the axis of the screw 5, and the included angle is any value (including two end point values) within 0-75 degrees. An included angle is formed between the auxiliary nozzle 53 and the axis of the screw 5, and the included angle is any value (including two end point values) within 0-75 degrees. The nozzle 62 and the auxiliary nozzle 53 are rotated by an angle to ensure that the cooling liquid of the nozzle is sprayed near the cutting edge of the blade. The angle of the nozzle 62 and the auxiliary nozzle 53 towards the blade 2 can be adjusted, so that the nozzle 62 and the auxiliary nozzle 53 can be directed to the same position on the blade 2 or different positions, and the most preferable scheme is that the nozzle 62 and the auxiliary nozzle 53 are respectively directed to two knife edges of the cutting surface of the blade 2 (shown by a dotted line in fig. 2).
In the present embodiment, the third oil passage 61 is a blind hole. The screw 5 has a first counterbore 501 at the outward end, the internal threaded hole 52 is a small hole of the first counterbore 501, and the small hole of the first counterbore 501 is engaged with the second oil passage 51. The inward end of the screw 5 is provided with a second counter bore 502, the diameter of the small hole of the second counter bore 502 is the same as that of the second oil channel 51, the diameter of the large hole of the second counter bore 502 is smaller than that of the screw 5, the diameter of the first oil channel 13 is larger than that of the large hole of the second counter bore 502 and smaller than that of the screw 5, and the fact that the first oil channel 13 abuts against the end face of the screw 5 is that no cooling liquid leaks between the first oil channel 13 and the second oil channel 51.
Example 2
The internal-cooling three-sided blade milling cutter of the present embodiment is different from embodiment 1 only in that:
in this embodiment, the nozzle 62 is not provided, the second oil passage 51 in the screw rod 5 is a blind hole, the outward end of the screw rod 5 is closed, the inward end of the screw rod 5 is communicated with the first oil passage 13 and the annular groove 12, and the outward end of the screw rod 5 is directly provided with the auxiliary nozzle 53. The auxiliary nozzle 53 may also be directed towards one of the cutting edges of the blade 2. However, the position of the auxiliary cutting edge 53 can only be finely adjusted in this embodiment, and the outward end of the screw 5 must be long enough to spray the blade 2, which has a certain cooling effect but does not achieve the effect of embodiment 1.
Example 3
This embodiment differs from embodiment 1 only in that:
in this embodiment, the nozzle 62 is provided only on the stopper pin 6, and the auxiliary nozzle 53 is not provided on the screw 5. The position of the nozzle 62 can be adjusted at will, and the nozzle can be better directed to the blade 2, but only one cutting edge of the blade 2 can be sprayed by one nozzle, and the embodiment can have better cooling effect, but the effect of the embodiment 1 cannot be achieved.
Although the present invention has been described with reference to the preferred embodiments, it is not intended to be limited thereto. Those skilled in the art can make numerous possible variations and modifications to the present invention, or modify equivalent embodiments to equivalent variations, without departing from the scope of the invention, using the teachings disclosed above. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical spirit of the present invention should fall within the protection scope of the technical scheme of the present invention, unless the technical spirit of the present invention departs from the content of the technical scheme of the present invention.
Claims (10)
1. The utility model provides an interior cold trilateral sword milling cutter, includes blade disc (1), blade (2) and blade fastening components, blade disc (1) is equipped with chip groove (11) of a plurality of equipartitions along circumference, blade (2) are installed in chip groove (11) through blade fastening components, its characterized in that: blade fastening component includes cutter holder (3), briquetting (4) and screw rod (5), establish in chip pocket (11) briquetting (4) and cutter holder (3), briquetting (4) and cutter holder (3) support each other and press, and briquetting (4) are fixed on blade disc (1) through the external screw thread of screw rod (5), blade (2) are fixed on cutter holder (3) through screw (21), the inside second oil duct (51) that link up that is equipped with of screw rod (5), blade disc (1) is equipped with annular (12), second oil duct (51) are through first oil duct (13) and annular (12) intercommunication, screw rod (5) one end outwards is inserted and is equipped with cotter (6), cotter (6) have the external screw thread, screw rod (5) have with external screw thread complex internal thread hole (52), cotter (6) are located the one end in internal thread hole (52) and have third oil duct (61), the third oil duct (61) is communicated with the second oil duct (51), a nozzle (62) pointing to the blade (2) is arranged on the outer surface of the blocking pin (6), the nozzle (62) is communicated with the third oil duct (61), and the blocking pin (6) is locked on the screw rod (5) through a locking nut (7).
2. The internally-cooled three-sided milling cutter according to claim 1, wherein: the outer surface of one end of the screw rod (5) facing outwards is provided with an auxiliary nozzle (53) pointing to the blade (2), the auxiliary nozzle (53) is communicated with the second oil duct (51), and the auxiliary nozzle (53) and the nozzle (62) point to different cutting edges of the blade (2).
3. The internally-cooled three-sided milling cutter according to claim 1, wherein: the external thread of the plug pin (6) comprises a first external thread (601) and a second external thread (602) which are opposite in turning direction, the first external thread (601) is connected with the locking nut (7), and the second external thread (602) is connected with the internal thread hole (52) of the screw rod (5).
4. The internally cooled face mill according to any one of claims 1 to 3, characterized in that: the blocking pin (6) is coaxial with the screw (5), and the third oil channel (61) of the blocking pin (6) is coaxial with the second oil channel (51) of the screw (5) and coaxial with the screw (5).
5. The internally-cooled three-sided milling cutter according to claim 4, wherein: an included angle is formed between the nozzle (62) and the axis of the screw (5), and the included angle is 0-75 degrees.
6. The internally cooled three-sided milling cutter according to claim 2, wherein: an included angle is formed between the auxiliary nozzle (53) and the axis of the screw rod (5), and the included angle is 0-75 degrees.
7. The internally cooled face mill according to any one of claims 1 to 3, characterized in that: the third oil duct (61) is a blind hole.
8. The internally cooled face mill according to any one of claims 1 to 3, characterized in that: the screw rod (5) is provided with a first counter bore (501) at the outward end, the internal thread hole (52) is a small hole of the first counter bore (501), and the small hole of the first counter bore (501) is connected with the second oil channel (51).
9. The internally cooled face mill according to any one of claims 1 to 3, characterized in that: the screw rod (5) is provided with a second counter bore (502) at the inward end, the diameter of a small hole of the second counter bore (502) is the same as that of the second oil channel (51), the diameter of a large hole of the second counter bore (502) is smaller than that of the screw rod (5), and the diameter of the first oil channel (13) is larger than that of the large hole of the second counter bore (502) and smaller than that of the screw rod (5).
10. The utility model provides an interior cold trilateral sword milling cutter, includes blade disc (1), blade (2) and blade fastening components, blade disc (1) is equipped with chip groove (11) of a plurality of equipartitions along circumference, blade (2) are installed in chip groove (11) through blade fastening components, its characterized in that: blade fastening components includes cutter holder (3), briquetting (4) and screw rod (5), establish in chip pocket (11) briquetting (4) and cutter holder (3), the two supports each other and presses, and external screw thread that just briquetting (4) passed through screw rod (5) is fixed on blade disc (1), blade (2) are fixed on cutter holder (3) through screw (21), be equipped with second oil duct (51) along the axial in screw rod (5), second oil duct (51) are sealed at screw rod (5) one end outwards, blade disc (1) is equipped with annular (12), second oil duct (51) are through first oil duct (13) and annular (12) intercommunication, and the surface of screw rod (5) one end outwards has supplementary spout (53) of directional blade (2), supplementary spout (53) and second oil duct (51) intercommunication.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811425890.5A CN109332775B (en) | 2018-11-27 | 2018-11-27 | Inner-cooling three-edge milling cutter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811425890.5A CN109332775B (en) | 2018-11-27 | 2018-11-27 | Inner-cooling three-edge milling cutter |
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| CN109332775A CN109332775A (en) | 2019-02-15 |
| CN109332775B true CN109332775B (en) | 2020-05-05 |
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| CN113510299B (en) * | 2021-03-10 | 2022-09-27 | 东方电气集团东方汽轮机有限公司 | Inner-cooling hard alloy blade type broach single section and complete set of broach |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL180365C (en) * | 1979-06-11 | 1987-02-02 | Philips Nv | METHOD FOR MANUFACTURING SEMICONDUCTOR COOLING BLOCKS AND SEMICONDUCTOR LASER CONTAINING A COOLING BLOCK MANUFACTURED BY THIS PROCESS. |
| DE3642375A1 (en) * | 1986-12-11 | 1988-06-23 | Castolin Sa | METHOD FOR APPLYING AN INTERNAL COATING INTO TUBES OD. DGL. CAVITY NARROW CROSS SECTION AND PLASMA SPLASH BURNER DAFUER |
| US7883299B2 (en) * | 2007-01-18 | 2011-02-08 | Kennametal Inc. | Metal cutting system for effective coolant delivery |
| CN207982330U (en) * | 2018-02-02 | 2018-10-19 | 哈尔滨空调股份有限公司 | A kind of compound tool for processing Twin-plug sealing structure pipe plug opening |
| CN208033687U (en) * | 2018-04-13 | 2018-11-02 | 华东交通大学 | A kind of interior cooling turning tool |
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