CN210755430U - An inner jet spiral end mill - Google Patents

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

An inner jet spiral end mill

technical field

The utility model relates to the technical field of lathes, in particular to an inner jet spiral end mill.

Background technique

Milling, especially in the process of high-speed milling, generates a lot of heat during the cutting process of the tool. If the tool is not cooled and lubricated, the tool will wear faster. Generally, the milling machine uses a bamboo-shaped cooling pipe nozzle fixed beside the main shaft to spray cutting fluid for cooling and lubrication, but the cutting fluid often causes large thermal stress. Therefore, the cutting fluid not only has a poor cooling effect, but may cause accelerated tool wear in high-speed milling and reduce tool life.

The compressed gas is mixed with a trace amount of lubricating oil to form a trace amount of lubricating compressed gas, which can be effectively injected into the cutting area of the milling tool for effective cooling and lubrication. At present, the compressed gas for MQL is generally sprayed on the tool through the bamboo nozzle fixed next to the spindle, but affected by the change of the tool path, the relative position of the tool and the workpiece keeps changing. The jet of compressed gas is blocked by the workpiece and cannot be injected into the cutting contact area between the tool and the workpiece. The poor transmission of air jet cooling medium leads to poor cooling and lubrication effect, and the tool accumulates a large amount of cutting heat, resulting in reduced tool life and reduced machining quality.

At present, the internal cooling tool generally adopts complete penetration, and a large amount of cutting fluid and water are sprayed from the bottom of the cutting part, and the utilization efficiency of the cutting fluid is low. In addition, the formation of chips will hinder the cooling effect of the cutting fluid on the rake face, and the cooling efficiency is not ideal.

Utility model content

In order to overcome the problem in the prior art that the cooling heat cannot be sprayed into the cutting contact area between the tool and the workpiece, resulting in poor cooling and lubricating effect, the utility model provides an internal spray spiral end mill.

In order to solve the above technical problems, the technical scheme adopted by the present utility model is: an internal jet spiral end mill, comprising a cutter body, a plurality of spiral grooves are arranged on the cutter body, and a main air jet is arranged in the cutter body a channel, the spiral groove is provided with a branch air jet channel that communicates with the main air jet channel along the spiral groove track, and the branch air jet channel is provided with a plurality of jet jets used in the branch air jet channel To the rake face of the cutter body and the ejection port of the blade.

In this technical solution, the branch air jet channel is arranged along the spiral groove, and the branch air jet channel is provided with an ejection port to control the jet in the branch air jet channel to be sprayed on the rake face and the blade edge of the cutter body, which significantly improves the accuracy of the The cooling effect of the rake face and the blade edge of the cutter body; the arrangement of several nozzles can cool the rake face and the blade edge of the entire cutter body, so as to avoid the stress concentration of the rake face and the blade edge caused by uneven cooling. It should be noted that the gas ejection in the branch gas jet channel will diverge, and the branch gas jet channel can be arranged along the spiral groove closer to the cutting edge, which is more conducive to reducing the temperature of the cutting edge and removing chips. The utility model can accurately transport high-pressure gas to the cutting area, improve the cooling effect, and has the advantages of significantly improving the service life of the tool, and at the same time, adopting gas cooling is more environmentally friendly.

Preferably, the interval between the ejection ports is 1 mm to 10 mm. In this technical solution, the ejection ports may be arranged on the branch gas jet passages at equal distances, or may be arranged on the branch gas jet passages at different intervals.

Preferably, the center of the ejection port is directly opposite the rake face and the cutting edge of the cutter body. In this technical solution, the jet ejected from the ejection port can act on the rake face and the cutting edge of the cutter body, raise the chips during the working process of the tool, and reduce the friction between the chips and the rake face while removing the chips. The generation of heat can also cool the blade.

Preferably, the included angle between the axis of the ejection outlet and the facing blade is between 45° and 135°. In this technical solution, different angles control the jetting direction of the air jet, thereby affecting the chip removal direction, and at the same time, the rake face can be cooled at multiple angles to improve the cooling effect on the rake face and the cutting edge.

Preferably, the hole diameter of the jetting port is smaller than the pipe diameter of the branched gas jet channel. In this technical solution, the aperture of the ejection port is smaller than the pipe diameter of the branch gas jet channel, which can ensure that the jet ejected from the ejection port has a certain initial velocity.

Preferably, the aperture of the ejection port ranges from 0.3 mm to 3 mm. The hole diameter of the jet outlet needs to be adjusted according to the diameter of the cutter body and the diameter of the branch air jet channel.

Preferably, the ejection port is conical or circular. It should be noted that the ejection port may also be in other shapes.

Preferably, the end of the branched gas jet channel is an open structure. In this technical solution, the gas ejected from the end of the branched gas jet channel can act on the junction of the rake face and the flank, which is beneficial to cooling the junction of the rake face and the flank.

Preferably, the cutter body, the spiral groove, the main air jet channel, the branch air jet channel, and the ejection port can be formed by 3D printing technology. In this technical solution, by using 3D printing to manufacture the tool, some difficult-to-machine internal structures can be easily realized. Through the optimization of the internal structure of the tool, the high-pressure gas can be accurately delivered to the cutting area, so that the cooling efficiency can be improved.

Compared with the prior art, the beneficial effects are:

1. In the utility model, the ejection port controls the jet to spray to the rake face and the blade, and the ejected high-pressure jet helps to remove the chips, keeps the rake face clean, and avoids excessively long chips from wrapping the tool or the chips remaining on the rake face. , improve processing conditions, effectively increase tool life.

2. The amount of lubricating oil of the present utility model is very small, but the effect is very significant, which not only improves the work efficiency, but also does not cause pollution to the environment. As long as it is used properly, the processed tools, workpieces and chips are dry, avoiding the later stage. processing, in line with the development trend of green processing.

3. The utility model utilizes the impact of the compressed gas to raise the chips, reduces the heat accumulated by the tool due to the friction between the rake face and the chips, and at the same time reduces the tool wear caused by the friction between the rake face and the chips, effectively improving the cutting tool. lifespan.

Description of drawings

Fig. 1 is the perspective view of the utility model inner jet spiral end mill;

Fig. 2 is the perspective view of the inner jet spiral end mill of the present utility model;

Fig. 3 is the structural representation of the spout in the present utility model;

4 is a schematic diagram of the jet of the present utility model jetting up the chips;

FIG. 5 is a schematic diagram of the included angle ɑ between the axis of the jet outlet of the present invention and the facing blade.

Detailed ways

The accompanying drawings are for illustrative purposes only, and should not be construed as limitations on this patent; in order to better illustrate the present embodiment, some parts of the accompanying drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product; for those skilled in the art It is understandable to the artisan that certain well-known structures and descriptions thereof may be omitted from the drawings. The positional relationships described in the drawings are only for exemplary illustration, and should not be construed as a limitation on the present patent.

The same or similar symbols in the drawings of the embodiments of the present invention correspond to the same or similar components; in the description of the present invention, it should be understood that if there are terms "upper", "lower", "left", " The orientation or positional relationship indicated by "right", "long" and "short" is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying the indicated device or element. It must have a specific orientation, be constructed and operated in a specific orientation, so the terms describing the positional relationship in the accompanying drawings are only used for exemplary illustration, and should not be construed as a limitation on this patent. Understand the specific meanings of the above terms under specific circumstances.

Below by specific embodiment, and in conjunction with accompanying drawing, the technical scheme of the present utility model is further described in detail:

Example 1

As shown in FIGS. 1 to 3 , an internal jet spiral end mill of the present invention includes a cutter body 1, a plurality of spiral grooves 2 are arranged on the cutter body 1, and a main air jet channel 3 is arranged in the cutter body 1. The groove 2 is provided with a branch gas jet channel 4 that communicates with the main gas jet channel 3 along the trajectory of the spiral groove 2, and the branch gas jet channel 4 is provided with a plurality of jets used in the branch gas jet channel 4 to spray to the knife body 1 of the rake face 6 and the ejection port 5 of the blade 7. The branch air jet channel 4 is arranged along the spiral groove 2, and the branch air jet channel 4 is provided with a jet outlet 5, which can control the jet in the branch air jet channel 4 to be sprayed on the rake face 6 and the blade edge 7 of the cutter body, which significantly improves the Cooling effect on the rake face 6 and the cutting edge 7 of the cutter body 1 .

Wherein, the interval between the ejection ports 5 is 1 mm to 10 mm. It should be noted that the ejection ports 5 may be arranged on the branch gas jet passages 4 at equal distances, or may be arranged on the branch gas jet passages 4 at different intervals.

In addition, the center of the ejection port 5 faces the rake face 6 and the blade edge 7 of the cutter body 1 . The jet ejected from the ejection port 5 can act on the rake face 6 and the cutting edge 7 of the cutter body 1, raise the chips during the working process of the tool, reduce the friction between the chips and the rake face while removing the chips, and reduce the heat loss. It can also cool the blade.

In addition, the hole diameter of the ejection port 5 is smaller than the pipe diameter of the branch gas jet passage 4 . The aperture of the jetting port 5 is smaller than the pipe diameter of the branch gas jet channel 4, which can ensure that the jet jetted from the jetting port 5 has a certain initial velocity.

Wherein, the aperture range of the ejection port 5 is 0.3 mm to 3 mm. The aperture of the ejection port 5 needs to be adjusted according to the diameter of the cutter body 1 and the diameter of the branch air jet channel 4 . The shape of the ejection port 5 is a cone or a circle.

In addition, the end of the branched gas jet channel 4 is an open structure. The gas ejected from the end of the branch air jet channel 4 can act on the junction of the rake face and the flank through the opening structure, which is beneficial to cooling the junction of the rake face and the flank.

Among them, the cutter body 1, the spiral groove 2, the main air jet channel 3, the branch air jet channel 4, and the ejection port 5 can be formed by 3D printing technology. Using 3D printing to manufacture tools, some difficult-to-machine internal structures are easy to achieve. Through the optimization of the internal structure of the tool, the high-pressure gas can be accurately delivered to the cutting area, so that the cooling efficiency can be improved.

As shown in Figure 4, due to the impact of the compressed gas on the chips, the chips are raised, reducing the heat accumulated by the tool due to the friction between the rake face 6 and the chips, effectively reducing the temperature of the cutting area, and at the same time reducing the rake face. 6. The tool wear caused by friction with chips can effectively improve the life of the tool. The ejected high-pressure jet is helpful for chip removal, avoids chip entanglement, keeps the rake face 6 clean, improves processing conditions, and effectively increases tool life. Due to the accurate delivery and ejection of the cooling gas, the required amount of lubricating oil is extremely small, and the cooling and lubricating effect is very significant, which not only improves the work efficiency, but also does not cause pollution to the environment. As long as it is used properly, the processed tools, workpieces and chips are dry, which avoids post-processing and conforms to the development trend of green processing.

As shown in FIG. 5 , the included angle α between the axis of the ejection port 5 and the opposite blade 7 is between 45° and 135°. Different angles control the jetting direction of the air jet, thereby affecting the chip removal direction. At the same time, the rake face can be cooled at multiple angles to improve the cooling effect of the rake face and the cutting edge.

Working principle: When compressed gas and trace lubricating oil or high-pressure gas, liquid nitrogen, etc. enter from the main gas jet channel 3, the cooling medium used is shunted to each branch gas jet channel 4, along the spiral groove of the cutting part of the cutter body 2 2 flow, and finally ejected from a plurality of small ejection ports 5 distributed on the branch gas jet channel 4 at intervals.

Obviously, the above-mentioned embodiments of the present invention are only examples for clearly illustrating the present invention, rather than limiting the implementation of the present invention. For those of ordinary skill in the art, changes or modifications in other different forms can also be made on the basis of the above description. There is no need and cannot be exhaustive of all implementations here. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present utility model shall be included within the protection scope of the claims of the present utility model.

Claims (9)

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.

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