CN210755430U

CN210755430U - Internal injection spiral end mill

Info

Publication number: CN210755430U
Application number: CN201921156925.XU
Authority: CN
Inventors: 朱稳中; 吴世雄
Original assignee: Guangdong University of Technology
Current assignee: Guangdong University of Technology
Priority date: 2019-07-22
Filing date: 2019-07-22
Publication date: 2020-06-16
Anticipated expiration: 2029-07-22

Abstract

The utility model relates to a lathe technical field, more specifically relates to an interior spiral of spraying end mill. The internal injection spiral end mill comprises a cutter body, wherein a plurality of spiral grooves are formed in the cutter body, a main air jet flow channel is formed in the cutter body, branch air jet flow channels communicated with the main air jet flow channel are formed in the spiral grooves along spiral groove tracks, and a plurality of jetting ports used for jetting in the branch air jet flow channels to a rake face and a cutting edge of the cutter body are formed in the branch air jet flow channels. The utility model discloses well jet outlet control efflux sprays to rake face and cutting edge, and the chip removal is helped to spun high-pressure efflux, keeps the clean of rake face, avoids smear metal overlength winding cutter or smear metal to remain on the rake face, improves the processing conditions, effectively improves the cutter life-span.

Description

Internal injection spiral end mill

Technical Field

The utility model relates to a lathe technical field, more specifically relates to an interior spiral of spraying end mill.

Background

During milling, especially high-speed milling, a large amount of heat is generated during cutting of a cutter, and the cutter cannot be cooled and lubricated, so that the cutter is worn quickly. The milling machine generally adopts a bamboo joint-shaped cooling pipe nozzle fixed beside a main shaft to spray cutting fluid for cooling and lubrication, but the cutting fluid often causes large thermal stress, and in addition, the spraying speed of the cutting fluid is low, and the cutting fluid is difficult to inject into a cutting contact area of a cutter, so that the cutting fluid not only has poor cooling effect, but also can cause the cutter of high-speed milling to be abraded more quickly, and the service life of the cutter is shortened.

The compressed gas is mixed with trace lubricating oil to form trace lubricating compressed gas which can be effectively injected into a cutting area of the milling cutter for effective cooling and lubrication. At present, a tool is sprayed outwards by a small amount of lubricating compressed gas through a bamboo joint nozzle fixed beside a main shaft, but the relative position of the tool and a workpiece is changed ceaselessly under the influence of the change of a tool path, and the gas jet flow of the small amount of lubricating compressed gas is blocked by the workpiece and cannot be sprayed to a cutting contact area of the tool and the workpiece due to the external spraying mode of the bamboo joint nozzle. Poor cooling and lubricating effects caused by poor transmission of the air jet cooling medium, and a large amount of cutting heat accumulated by the cutter, thereby reducing the service life of the cutter and reducing the processing quality.

At present, the inner-cooling type cutting tool is generally completely penetrated, a large amount of cutting fluid and water are sprayed out from the bottom of a cutting part, and the utilization efficiency of the cutting fluid is low. In addition, the formation of chips hinders the cooling action of the cutting fluid on the rake face, and the cooling efficiency is not satisfactory.

SUMMERY OF THE UTILITY MODEL

The utility model discloses an overcome among the above-mentioned prior art cutting contact area that the cooling heat can't spray cutter and work piece, lead to the not good problem of cooling and lubrication effect, provide an interior spiral end mill that sprays.

In order to solve the technical problem, the utility model discloses a technical scheme is: the internal injection spiral end mill comprises a cutter body, wherein a plurality of spiral grooves are formed in the cutter body, a main air jet flow channel is formed in the cutter body, branch air jet flow channels communicated with the main air jet flow channel are formed in the spiral grooves along spiral groove tracks, and a plurality of jetting ports used for jetting in the branch air jet flow channels to a rake face and a cutting edge of the cutter body are formed in the branch air jet flow channels.

In the technical scheme, the branch gas jet flow channel is arranged along the spiral groove, and the jet opening arranged in the branch gas jet flow channel can control jet flow in the branch gas jet flow channel to be sprayed to the front cutter face and the cutting edge of the cutter body, so that the cooling effect on the front cutter face and the cutting edge of the cutter body is obviously improved; the arrangement of a plurality of jetting ports can play the cooling effect to the rake face and the cutting edge of whole cutter body, avoids the uneven stress concentration who arouses rake face and cutting edge of cooling. It should be noted that the gas in the branch gas jet channel is sprayed out and is diffused, and the branch gas jet channel is arranged along the spiral groove and can be closer to the cutting edge, which is more beneficial to the reduction of the temperature of the cutting edge and the chip removal. The utility model discloses can accurate carry high-pressure gas to cutting area, improve the cooling effect, have and show the advantage that improves the cutter life-span, adopt gas cooling more green simultaneously.

Preferably, the interval between the ejection orifices is 1mm to 10 mm. In this technical scheme, the blowout ports can be equidistantly arranged on the branch gas jet channel, and also can be arranged on the branch gas jet channel at different intervals.

Preferably, the center of the ejection port is opposite to the rake face and the cutting edge of the cutter body. In this technical scheme, follow spout blowout efflux and can act on the rake face and the cutting edge of cutter body, raise the smear metal at the cutter working process, also reduce the friction of smear metal and rake face when the chip removal, reduce thermal production, also can cool down the cutting edge.

Preferably, the included angle between the axis of the ejection port and the opposite blade is 45-135 degrees. In this technical scheme, the jet-flow blowout direction is controlled to different angles to influence the chip removal direction, can carry out the multi-angle to the rake face simultaneously and cool off, improve the cooling effect to rake face and cutting edge.

Preferably, the aperture of the ejection port is smaller than the pipe diameter of the branch gas jet flow channel. In this technical scheme, the aperture of blowout port is less than the pipe diameter of branch gas jet channel, can guarantee that the efflux of spouting from the blowout port has certain initial velocity.

Preferably, the orifice diameter of the ejection orifice ranges from 0.3mm to 3 mm. The aperture of the jet outlet is adjusted according to the diameter of the cutter body and the diameter of the branch gas jet channel.

Preferably, the ejection orifice is tapered or circular. The ejection port may have other shapes.

Preferably, the end of the branch gas jet channel is of an open structure. In this technical scheme, branch gas jet current channel end spun gas can act on the juncture of rake face and flank face, is favorable to cooling the juncture of rake face and flank face.

Preferably, the cutter body, the spiral groove, the main air jet channel, the branch air jet channel and the ejection opening can be formed by a 3D printing technology. In this technical scheme, utilize 3D to print manufacturing cutter, some difficult inner structure of processing just realize easily. Through the optimization of the internal structure of the cutter, high-pressure gas can be accurately conveyed to a cutting area, so that the cooling efficiency can be improved.

Compared with the prior art, the beneficial effects are:

1. the utility model discloses well jet outlet control efflux sprays to rake face and cutting edge, and the chip removal is helped to spun high-pressure efflux, keeps the clean of rake face, avoids smear metal overlength winding cutter or smear metal to remain on the rake face, improves the processing conditions, effectively improves the cutter life-span.

2. The utility model discloses a lubricating oil quantity is few, but the effect is showing very, has both improved the work efficiency, can not cause the pollution to the environment again, as long as use properly, cutter, work piece and smear metal after the processing are all dry, have avoided the processing in later stage, accord with the development trend of green processing.

3. The utility model discloses utilize compressed gas's impact, raise the smear metal, reduced the cutter because of the heat of the friction accumulation of rake face and smear metal, the cutter wearing and tearing that the friction that can also reduce rake face and smear metal arouses simultaneously effectively improve the life-span of cutter.

Drawings

FIG. 1 is a perspective view of an internal jet helical end mill of the present invention;

FIG. 2 is a perspective view of the internal jet helical end mill of the present invention;

FIG. 3 is a schematic structural view of the middle nozzle of the present invention;

FIG. 4 is a schematic view of the jet flow of the jet nozzle of the present invention raising the chips;

fig. 5 is a schematic view of an angle α between the ejection port axis and the opposing blade.

Detailed Description

The drawings are for illustrative purposes only and are not to be construed as limiting the patent; for the purpose of better illustrating the embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted. The positional relationships depicted in the drawings are for illustrative purposes only and are not to be construed as limiting the present patent.

The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if there are the terms "upper", "lower", "left", "right", "long", "short", etc. indicating the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, it is only for convenience of description and simplification of description, but it is not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore the terms describing the positional relationship in the drawings are only for illustrative purposes and are not to be construed as limiting the present patent, and those skilled in the art will understand the specific meaning of the terms according to their specific circumstances.

The technical solution of the present invention is further described in detail by the following specific embodiments in combination with the accompanying drawings:

example 1

Fig. 1 to fig. 3 show, the utility model relates to an internal injection spiral end mill, including cutter body 1, be provided with a plurality of spiral grooves 2 on the cutter body 1, be provided with main gas jet flow channel 3 in the cutter body 1, spiral groove 2 is gone up and is provided with the branch gas jet flow channel 4 that is linked together with main gas jet flow channel 3 along 2 trails of spiral groove, is provided with a plurality of jet spouts to the rake face 6 of cutter body 1 and the spout 5 of cutting edge 7 that are arranged in branch gas jet flow channel 4 on the branch gas jet flow channel 4. The branch gas jet flow channel 4 is arranged along the spiral groove 2, and the jet port 5 arranged in the branch gas jet flow channel 4 can control the jet flow in the branch gas jet flow channel 4 to be sprayed to the rake face 6 and the cutting edge 7 of the cutter body, so that the cooling effect on the rake face 6 and the cutting edge 7 of the cutter body 1 is obviously improved.

Wherein the interval between the ejection ports 5 is 1mm to 10 mm. The ejection ports 5 may be provided at equal intervals in the branched air flow path 4, or may be provided at different intervals in the branched air flow path 4.

The center of the ejection port 5 faces the rake face 6 and the blade 7 of the cutter body 1. The jet flow sprayed out of the spray opening 5 can act on the front knife face 6 and the knife edge 7 of the knife body 1, so that the cutting chips are lifted in the working process of the knife, the friction between the cutting chips and the front knife face is reduced while the cutting chips are discharged, the generation of heat is reduced, and the temperature of the knife edge can also be reduced.

Further, the aperture of the ejection port 5 is smaller than the pipe diameter of the branched gas jet flow path 4. The aperture of the ejection port 5 is smaller than the pipe diameter of the branched gas jet flow passage 4, so that the jet flow ejected from the ejection port 5 can have a certain initial speed.

Wherein the aperture of the ejection port 5 is in the range of 0.3mm to 3 mm. The diameter of the ejection port 5 is adjusted according to the diameter of the cutter body 1 and the diameter of the branched gas jet passage 4. The shape of the ejection port 5 is a cone or a circle.

In addition, the end of the branch air jet channel 4 is an opening structure. The gas sprayed from the tail end of the branch gas jet channel 4 can act on the junction of the front tool face and the rear tool face through the opening structure, and the cooling of the junction of the front tool face and the rear tool face is facilitated.

The cutter body 1, the spiral groove 2, the main air jet flow channel 3, the branch air jet flow channel 4 and the ejection port 5 can be formed through a 3D printing technology. By utilizing 3D printing to manufacture the cutter, some internal structures which are difficult to machine are easy to realize. Through the optimization of the internal structure of the cutter, high-pressure gas can be accurately conveyed to a cutting area, so that the cooling efficiency can be improved.

As shown in fig. 4, the impact of the compressed gas on the chips raises the chips, reduces the heat accumulated by the friction between the rake surface 6 and the chips, effectively reduces the temperature of the cutting area, and simultaneously reduces the tool wear caused by the friction between the rake surface 6 and the chips, thereby effectively improving the service life of the tool. The high-pressure jet flow sprayed out is helpful for chip removal, avoids the winding of chips, keeps the cleanness of the front cutter face 6, improves the processing conditions and effectively prolongs the service life of the cutter. Because the cooling gas is accurately conveyed and sprayed, the required lubricating oil is extremely small, the cooling and lubricating effects are very obvious, the work efficiency is improved, and the environment is not polluted. As long as the cutting tool is properly used, the machined cutting tool, the machined workpiece and the machined cuttings are dry, the post-treatment is avoided, and the development trend of green machining is met.

As shown in fig. 5, an angle a between the axis of the ejection port 5 and the opposed blade 7 is 45 ° to 135 °. The jet-flow blowout direction of angle control gas of difference to influence the chip removal direction, can carry out the multi-angle to the rake face simultaneously and cool off, improve the cooling effect to rake face and cutting edge.

The working principle is as follows: when compressed gas and trace lubricating oil or high-pressure gas, liquid nitrogen and the like enter from the main gas jet flow channel 3, the used cooling medium is divided into the branch gas jet flow channels 4, flows along the spiral grooves 2 of the cutting part of the cutter body 2, and is finally sprayed out from a plurality of small spray ports 5 distributed on the branch gas jet flow channels 4 at intervals, and the spray ports 5 control the cooling medium to be uniformly sprayed to the rake face 6 and the cutting edge 7, so that the accurate delivery of the compressed gas is realized.

It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not limitations to the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. The utility model provides an interior spiral end mill that sprays, includes cutter body (1), be provided with a plurality of spiral grooves (2) on cutter body (1), its characterized in that: the cutter body (1) is internally provided with a main gas jet flow channel (3), the spiral groove (2) is provided with a branch gas jet flow channel (4) communicated with the main gas jet flow channel (3) along the track of the spiral groove (2), and the branch gas jet flow channel (4) is provided with a plurality of jetting ports (5) for jetting the jet flow in the branch gas jet flow channel (4) to the front cutter face (6) and the cutting edge (7) of the cutter body.

2. An internal-jet helical end mill according to claim 1, wherein: the interval between the ejection holes (5) is 1mm to 10 mm.

3. An internal-jet helical end mill according to claim 2, wherein: the center of the ejection port (5) is over against the front knife face (6) and the knife edge (7) of the knife body.

4. An internal-jet helical end mill according to claim 3, wherein: the included angle between the axis of the ejection port (5) and the opposite blade (7) is 45-135 degrees.

5. An internal-jet helical end mill according to claim 1, wherein: the aperture of the ejection port (5) is smaller than the pipe diameter of the branch gas jet channel (4).

6. An internal-jet helical end mill according to claim 5, wherein: the aperture range of the ejection port (5) is 0.3mm to 3 mm.

7. An internal-jet helical end mill according to any one of claims 1 to 6, wherein: the ejection port (5) is conical or circular.

8. An internal jet helical end mill according to claim 1, wherein the branch gas jet channel (4) terminates with an open configuration.

9. The internal-jet helical end mill according to claim 1, wherein the cutter body (1), the helical flute (2), the main gas jet channel (3), the branch gas jet channel (4), and the ejection opening (5) are formed by 3D printing technology.