CN110614400A - Miniature cutter with coolant liquid delivery hole - Google Patents

Abstract

The invention discloses a micro tool with a cooling liquid delivery hole, which comprises a handle body and a cutting part, the diameter of the handle body is larger than the diameter of the cutting part; the free end of the handle body is provided with a cooling liquid distribution groove; A coolant channel is provided in the shank body; the inlet of the coolant channel is set at the bottom of the coolant distribution groove, and the outlet of the coolant channel is set at the junction of the shank body and the cutting part. Thus, the micro-tool with the coolant delivery hole of the present invention can directly spray the coolant onto the surface of the cutting edge of the tool, so that the tool can be cooled more fully during the cutting process and have a longer service life.

Description

A micro-tool with coolant delivery holes

technical field

The invention relates to the field of machining, in particular to a micro tool with cooling liquid delivery holes.

Background technique

In the field of machining, various drills, milling cutters, reamers and other tools are widely used. In order to better cool down the working tools, large-sized tools will have cooling holes inside the tool body that run through the handle and the cutting part, but Round bar milling cutters, drills, reamers and other micro-tools with a cutting part diameter less than 5mm, because the cutting part diameter is small, if the built-in cooling hole is directly installed in the cutting part, the strength of the tool itself will be reduced, resulting in a decrease in service life, so Tools with a cutting diameter of less than 5 mm generally do not have cooling holes.

In the prior art, the cutting tool with a diameter of the cutting part less than 5mm is mainly cooled by the coolant nozzle of the machine tool itself during the actual cutting process. In the process of hole machining, the tool needs to be fed axially. At this time, the coolant nozzle of the machine tool will move synchronously with the tool. Therefore, the coolant nozzle needs to be set at the highest point of the cutting part of the tool, so that it will eventually enter the hole. There is not much coolant, as shown in Figure 1a, the nozzle of the single and fixed coolant pipe 6 leads to uneven flow of coolant 5 on both sides of the cutting edge, which affects tool life and processing quality.

Therefore, this cooling method has extremely poor tool cooling effect in hole machining or obstructed machining conditions.

Contents of the invention

The technical problem to be solved by the invention is: how to improve the cooling effect of the micro cutter when it is working.

In order to solve the problems of the technologies described above, the technical solution adopted in the present invention is:

A micro tool with a cooling liquid delivery hole, comprising a handle body and a cutting part, the diameter of the handle body is larger than the diameter of the cutting part; the free end of the handle body is provided with a cooling liquid distribution groove; A cooling liquid passage is provided; the inlet of the cooling liquid passage is arranged at the bottom of the cooling liquid distribution groove, and the outlet of the cooling liquid passage is arranged at the junction of the handle body and the cutting part.

The beneficial effect of the invention is that the cooling liquid is directly sprayed onto the surface of the cutting edge of the tool, so that the tool is cooled more fully during the cutting process and has a longer service life. The coolant distribution groove makes the coolant flow through each cooling hole consistent, ensuring the same service life of the cutting edge on one side of the tool and improving the overall service life of the tool.

On the basis of the above technical solutions, the present invention can also be improved as follows.

Further, there are at least two coolant channels.

Further, the cross-section of the cooling liquid channel is one or more of oval, circular, prolate oblong, and isosceles trapezoidal.

Further, the coolant channel is parallel to the axis of the handle body.

Preferably, the cooling liquid channel is two flat straight holes, the cross section of which is oblate and oblong, and the two cooling liquid channels are distributed symmetrically along the axis of the handle.

The beneficial effect of taking the above further measures is: the hole has a large cross-sectional area, which can provide sufficient coolant flow, and improve the life of the tool and the processing quality of the workpiece.

Preferably, the cooling liquid channel is a circular straight hole with a circular cross section, and there are two in number, and the two cooling liquid channels are symmetrically distributed along the axis of the handle body.

The beneficial effect of taking the above further measures is that it is especially suitable for scenarios where the coolant flow rate is not high. When the diameter of the cutting part of the tool is small and the coolant flow rate is not high, the cross-sectional area of the cooling hole is reduced, which is extremely Larger guarantees the rigidity of the tool handle.

Preferably, the cooling liquid channel is a circular straight hole with a circular cross section, and the number is three, and the three cooling liquid channels are distributed symmetrically along the axis of the handle.

The beneficial effect of taking the above further measures is that the coolant is distributed more uniformly in the circumferential direction and the flow rate is larger, while ensuring a certain rigidity of the shank.

Preferably, the cooling liquid passage is a circular straight hole with a circular cross section, and there are four in number, and the four cooling liquid passages are distributed symmetrically along the axis of the handle.

The beneficial effect of taking the above further measures is to make the distribution of the cooling liquid in the circumferential direction more uniform. This solution is especially suitable for the machining conditions of the reamer. When the tool is reaming, the four cooling holes can ensure that the coolant reaches the cutting edge on each side evenly, improving the tool life and the precision and surface quality of the machined hole.

Preferably, the cooling liquid channel is an isosceles trapezoidal straight hole with an isosceles trapezoidal cross section, and the number is three, and the three cooling liquid channels are distributed symmetrically along the axis of the handle.

The beneficial effects of taking the above further measures are: the cross-sectional area of the cooling hole is increased, the flow rate of the cooling liquid is larger, and the distribution of the three holes can make the cooling liquid evenly distributed in the circumferential direction

Preferably, the cooling liquid channel is an isosceles trapezoidal straight hole with an isosceles trapezoidal cross section, and the number is four, and the four cooling liquid channels are distributed symmetrically along the axis of the handle.

The beneficial effect of taking the above further measures is that the cross-sectional area of the cooling hole is maximized, and the distribution of the cooling liquid in the circumferential direction is more uniform. This solution is especially suitable for the side machining conditions of the milling cutter. It can ensure that the contact part between the tool and the workpiece is continuously supplied with sufficient coolant during the side milling process, improving the tool life and the surface quality of the processed workpiece.

Description of drawings

Fig. 1 a is the cooling state schematic diagram of prior art micro cutter;

Fig. 1 b is a schematic diagram of the cooling state of the micro-tool with coolant delivery holes of the present invention;

Fig. 2a is a schematic diagram of a first viewing angle of Embodiment 1 of the present invention;

Fig. 2b is a schematic diagram of a second viewing angle of Embodiment 1 of the present invention;

Fig. 2c is a schematic diagram of the perspective structure of Embodiment 1 of the present invention;

Figure 2d is a top view of Embodiment 1 of the present invention;

Figure 2e is a bottom view of Embodiment 1 of the present invention;

Fig. 3a is a schematic diagram of a first viewing angle of Embodiment 2 of the present invention;

Fig. 3b is a schematic diagram of a second viewing angle of Embodiment 2 of the present invention;

Fig. 3c is a schematic diagram of a perspective structure of Embodiment 2 of the present invention;

Figure 3d is a top view of Embodiment 2 of the present invention;

Figure 3e is a bottom view of Embodiment 2 of the present invention;

Fig. 4a is a schematic diagram of a first viewing angle of Embodiment 3 of the present invention;

Fig. 4b is a schematic diagram of a second viewing angle of Embodiment 3 of the present invention;

Fig. 4c is a schematic diagram of a perspective structure of Embodiment 3 of the present invention;

Figure 4d is a top view of Embodiment 3 of the present invention;

Figure 4e is a bottom view of Embodiment 3 of the present invention;

Fig. 5a is a schematic diagram of a first viewing angle of Embodiment 4 of the present invention;

Fig. 5b is a schematic diagram of a second viewing angle of Embodiment 4 of the present invention;

Fig. 5c is a schematic diagram of a perspective structure of Embodiment 4 of the present invention;

Figure 5d is a top view of Embodiment 4 of the present invention;

Figure 5e is a bottom view of Embodiment 4 of the present invention;

Fig. 6a is a schematic diagram of a first viewing angle of Embodiment 5 of the present invention;

Fig. 6b is a schematic diagram of a second viewing angle of Embodiment 5 of the present invention;

Fig. 6c is a schematic diagram of a perspective structure of Embodiment 5 of the present invention;

Figure 6d is a top view of Embodiment 5 of the present invention;

Figure 6e is a bottom view of Embodiment 5 of the present invention;

Fig. 7a is a schematic diagram of a first viewing angle of Embodiment 6 of the present invention;

Fig. 7b is a schematic diagram of a second viewing angle of Embodiment 6 of the present invention;

Fig. 7c is a schematic diagram of the perspective structure of Embodiment 6 of the present invention;

Figure 7d is a top view of Embodiment 6 of the present invention;

Figure 7e is a bottom view of Embodiment 6 of the present invention;

In the accompanying drawings, the names of the parts represented by each label are listed as follows:

1. Handle body;

2. Cutting part;

3. Coolant distribution tank;

4. Coolant channel;

4-1. The inlet of the coolant channel;

4-2. Coolant channel outlet;

5. Coolant;

6. Coolant pipe.

Detailed ways

The principles and features of the present invention are described below in conjunction with the accompanying drawings, and the examples given are only used to explain the present invention, and are not intended to limit the scope of the present invention.

Please refer to Fig. 1-shown in Fig. 7, described micro tool with cooling liquid delivery hole comprises shank body 1 and cutting part 2, and the diameter of described shank body 1 is larger than the diameter of described cutting part 2; A cooling liquid distribution groove 3 is provided at the free end of the handle body 1; a cooling liquid passage 4 is provided in the handle body 1; the cooling liquid passage inlet 4-1 is arranged at the bottom of the cooling liquid distribution groove 3, and the cooling liquid passage The outlet 4-2 is located at the junction of the handle body 1 and the cutting part 2 .

There are at least two cooling liquid passages 4; the cross section of the cooling liquid passage 4 can be one or more of oval, circular, prolate oblong, isosceles trapezoidal; the cooling liquid passage 4 is parallel to The axis of the handle body 1.

Example 1

As shown in FIG. 2 , the cooling liquid channels 4 are two flat straight holes, the cross section of which is oblate and oblong, and the two cooling liquid channels 4 are distributed symmetrically along the axis of the handle body 2 .

In this embodiment, the hole has a large cross-sectional area, which can provide sufficient coolant flow, and improve the life of the tool and the processing quality of the workpiece.

Example 2

As shown in FIG. 3 , the cooling liquid passage 4 is a circular straight hole with a circular cross section, and there are two in number. The two cooling liquid passages 4 are symmetrically distributed along the axis of the handle body 2 .

This embodiment is especially suitable for scenarios where the coolant flow rate is not high. When the diameter of the cutting part of the tool is small and the coolant flow rate is not high, the cross-sectional area of the cooling hole is reduced, which greatly ensures the tool handle The stiffness of body 2.

Example 3

As shown in FIG. 4 , the cooling liquid passage 4 is a circular straight hole with a circular cross section, and there are three in number, and the three cooling liquid passages 4 are symmetrically distributed along the axis of the handle body 2 .

In this embodiment, the cooling liquid is sprayed more evenly, and the flow rate of the cooling liquid is improved to a certain extent.

Example 4

As shown in FIG. 5 , the cooling liquid passage 4 is a round straight hole with a circular cross section and four in number, and the four cooling liquid passages 4 are symmetrically distributed along the axis of the handle body 2 .

This embodiment makes the distribution of the cooling liquid in the circumferential direction more uniform. This solution is especially suitable for the machining conditions of the reamer. When the tool is reaming, the four cooling holes can ensure that the coolant reaches the cutting edge on each side evenly, improving the tool life and the precision and surface quality of the machined hole.

Example 5

As shown in FIG. 6 , the cooling liquid channel 4 is an isosceles trapezoidal straight hole with an isosceles trapezoidal cross section, and the number is three, and the three cooling liquid channels 4 are symmetrical along the axial direction of the handle body 2 distributed.

The beneficial effects of taking the above further measures are: the cross-sectional area of the cooling hole is increased, the flow rate of the cooling liquid is larger, and the distribution of the three holes can make the cooling liquid evenly distributed in the circumferential direction.

Example 6

As shown in Figure 7, the cooling liquid channel 4 is an isosceles trapezoidal straight hole, its cross section is an isosceles trapezoidal shape, and the number is four, and the four cooling liquid channels 4 are symmetrical along the axial direction of the handle body 2 distributed.

In this embodiment, the cross-sectional area of the cooling hole is maximized, and the distribution of the cooling liquid in the circumferential direction is more uniform. This solution is especially suitable for the side machining conditions of the milling cutter. It can ensure that the contact part between the tool and the workpiece is continuously supplied with sufficient coolant during the side milling process, improving the tool life and the surface quality of the processed workpiece.

Therefore, the beneficial effect obtained by the present invention is that the cooling liquid is directly sprayed onto the surface of the cutting edge of the tool, so that the tool is cooled more fully during the cutting process and has a longer service life. The coolant distribution groove makes the coolant flow through each cooling hole consistent, ensuring the same service life of the cutting edge on one side of the tool and improving the overall service life of the tool.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection of the present invention. within range.

Claims (10)

1. A micro-cutter with a coolant delivery hole, comprising a handle body and a cutting portion, characterized in that, the diameter of the handle body is greater than the diameter of the cutting portion; the free end of the handle body is provided with a coolant distribution groove; the shank body is provided with a cooling liquid channel; the inlet of the cooling liquid channel is set at the bottom of the cooling liquid distribution groove, and the outlet of the cooling liquid channel is set at the junction of the shank body and the cutting part. 2. The micro-tool with a cooling liquid delivery hole according to claim 1, wherein there are at least two cooling liquid passages. 3. The micro-cutter with a cooling liquid delivery hole according to claim 1 or 2, wherein the cross section of the cooling liquid channel is one of oval, circular, prolate oblong, isosceles trapezoidal or Various. 4. The micro-tool with a cooling liquid delivery hole according to claim 3, wherein the cooling liquid channel is parallel to the axis of the shank. 5. The micro-cutter with cooling liquid delivery hole according to claim 4, characterized in that, the cooling liquid passage is two flat straight holes, and its cross-section is oblate, and the two cooling liquid passages They are distributed symmetrically along the axis of the handle body. 6. The micro-cutter with cooling liquid delivery hole according to claim 4, characterized in that, the cooling liquid passage is a round straight hole, its cross section is circular, the number is two, and two of the cooling liquid The channels are distributed symmetrically along the axis of the handle. 7. The micro-cutter with cooling liquid delivery hole according to claim 4, characterized in that, the cooling liquid channel is a round straight hole, its cross section is circular, the number is three, and three of the cooling liquid The channels are distributed symmetrically along the axis of the handle. 8. The micro-cutter with cooling liquid delivery hole according to claim 4, characterized in that, the cooling liquid channel is a round straight hole, its cross section is circular, the number is four, and four of the cooling liquid The channels are distributed symmetrically along the axis of the handle. 9. The micro-cutter with cooling liquid delivery hole according to claim 4, characterized in that, the cooling liquid channel is an isosceles trapezoidal straight hole, its cross section is an isosceles trapezoid, the number is three, and three The coolant channels are distributed symmetrically along the axis of the handle. 10. The micro-cutter with cooling liquid delivery hole according to claim 4, characterized in that, the cooling liquid channel is an isosceles trapezoidal straight hole, its cross-section is an isosceles trapezoid, the number is four, and four The coolant channels are distributed symmetrically along the axis of the handle.