A cutting tool with a cooling structure

Abstract

This utility model relates to a cutting tool with a cooling structure, comprising: a tool holder, a cutting blade mounted on a tool head fixed at the bottom of the tool holder, a liquid guiding channel formed at the top of the tool holder, a constriction port at the inner end of the liquid guiding channel, the constriction port being tapered, and a plurality of parallel micro-branch tubes passing through the cutting blade at the outlet end of the constriction port, the outer ends of the micro-branch tubes being aligned with the outer wall of the cutting blade. This design employs a three-stage progressive flow channel design. Through the optimized combination of the liquid guiding channel, the tapered constriction port, and the parallel micro-branch tubes, it effectively avoids the pressure loss problem caused by abrupt changes in cross-sectional area in traditional structures. The diamond coating significantly reduces flow resistance, and the multi-branch tube diversion design significantly improves the uniformity of coolant coverage, solving the defect of incomplete cooling in traditional single-channel systems.

Description

Technical Field

[0001] This utility model relates to the field of waste treatment technology, and more specifically, to a cutting tool with a cooling structure. Background Technology

[0002] Cutting tools apply mechanical force (such as cutting, grinding, and drilling) directly to the workpiece, causing plastic deformation or fracture of the material, thereby machining the blank into parts of the required size, shape, and surface quality. Essentially, they are energy converters: transforming the rotational or linear motion of the machine tool into shearing, compressing, or tearing forces on the material.

[0003] Existing cutting tools are generally equipped with cooling channel designs. For example, a cutting tool with a cooling structure is announced in CN220112362U. By introducing coolant into the cooling channel, and with the outlet of the cooling channel directly located at the tip of the cutting tool, the coolant can directly cool the cutting part at the tip when it exits. At the same time, the coolant can wash away the chips generated by the cutting tool during cutting. It forms a barrier between the tip of the cutting tool and the cutting chips, allowing the cutting tool to cool down faster and improving tool life.

[0004] However, traditional designs have certain shortcomings. Although the inner diameter of the blade's flow channel is smaller than that of the tool holder's flow channel, when the two are directly connected, the cross-sectional area changes abruptly, causing the streamlines to contract sharply, consuming fluid kinetic energy, and resulting in a sudden drop in pressure. In addition, the single-channel design of the blade in traditional technology may have the problem of insufficient coverage.

[0005] Furthermore, the applicant also found that when the workload was particularly large and the working time was particularly long, the flow rate increase achieved by simply changing the inner diameter of the two channels was limited and could not meet the usage requirements.

[0006] Therefore, in order to address the above problems, it is necessary for the applicant to design a cutting tool with a cooling structure. Utility Model Content

[0007] The purpose of this invention is to provide a cutting tool with a cooling structure to solve the problems mentioned in the background section.

[0008] To solve the above-mentioned technical problems, this utility model provides a cutting tool with a cooling structure, including: a tool holder, on which a cutting blade is mounted on a tool head fixed at the bottom of the tool holder, a liquid guiding channel is provided at the top of the tool holder, and a constriction port is connected to the inner end of the liquid guiding channel. The constriction port is tapered, and the outlet end of the constriction port is connected to several parallel micro-branch tubes passing through the cutting blade. The outer end of the micro-branch tubes is aligned with the outer wall of the cutting blade.

[0009] Preferably, the liquid guiding channel, the constriction port, and the inner wall of the micro-branch tube are all covered with a protective coating, and the protective coating is made of diamond.

[0010] Preferably, the top of the liquid guiding channel can be located inside the knife holder, and a pressure boosting chamber is integrally formed on one side of the knife holder. The pressure boosting chamber is connected to the inlet of the liquid guiding channel, and the pressure boosting chamber is a contractile design.

[0011] Preferably, the pressurizing chamber adopts an inclined structure design, with its axis forming a preset angle with the axis of the liquid guiding channel, and the outlet end of the pressurizing chamber and the inlet end of the liquid guiding channel are smoothly connected through an arc transition section.

[0012] Preferably, the angle at which the coolant cuts into the fluid guide channel from the pressurization chamber is between 30 and 45 degrees.

[0013] Preferably, the inner wall of the pressurization chamber is provided with a spiral guide groove, and the pitch of the spiral guide groove gradually decreases from the inlet end to the outlet end.

[0014] The beneficial effects of this utility model are:

[0015] 1. This solution adopts a three-stage progressive flow channel design. Through the optimized combination of liquid guiding channels, conical contraction orifices and parallel micro-branch pipes, it effectively avoids the pressure loss problem caused by abrupt changes in cross-sectional area in traditional structures. The diamond coating significantly reduces flow resistance. Combined with the multi-branch pipe diversion design, it significantly improves the uniformity of coolant coverage and solves the defect of incomplete cooling in traditional single-channel systems.

[0016] 2. Furthermore, an innovative spiral booster chamber is integrated into the basic structure, and the unique inclined flow channel and gradient guide groove design form a highly efficient vortex booster system. This structure ensures that the coolant maintains a stable flow rate during long-term continuous operation, completely overcoming the problem of cooling performance degradation under heavy load conditions in traditional designs, and providing long-lasting and reliable cooling for the cutting tools. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0018] Figure 1 This is an overall perspective view of a preferred embodiment of the present invention;

[0019] Figure 2 This is an overall front view of a preferred embodiment of the present invention;

[0020] Figure 3 This is a preferred embodiment of the present invention, viewed from the front. Figure 1 ;

[0021] Figure 4 This is a partial perspective view of a preferred embodiment of the present invention;

[0022] Figure 5 This is a preferred embodiment of the present invention, viewed from the front. Figure 2 .

[0023] In the diagram: 1. Tool holder; 2. Blade; 3. Tool head; 4. Liquid guide channel; 5. Shrinkage port; 6. Micro-branch tube; 7. Pressure boosting chamber; 8. Spiral guide groove; 9. Protective coating. Detailed Implementation

[0024] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0025] Example 1, as Figures 1-4 As shown, the present invention provides a cutting tool with a cooling structure, comprising: a tool holder 1, a cutting head 3 fixed at the bottom of the tool holder 1 on which a cutting blade 2 is mounted, a liquid guiding channel 4 opened at the top of the tool holder 1, a constriction port 5 connected to the inner end of the liquid guiding channel 4, the constriction port 5 being tapered, and a plurality of parallel micro-branch tubes 6 (or a channel design, not limited) passing through the cutting blade 2 at the outlet end of the constriction port 5. The outlets of the micro-branch tubes 6 are arranged in an array and aligned with the outer wall of the cutting blade 2, and are close to the cutting tip. The liquid guiding channel 4, the constriction port 5 and the inner wall of the micro-branch tubes 6 are all covered with a protective coating 9, and the protective coating 9 can be made of diamond.

[0026] Through the above structural design, during operation, the external coolant flows in from the straight cylindrical liquid guide channel 4 at the top of the tool holder 1. The diamond protective coating 9 on the inner wall of the channel (the thickness can be designed to be about 0.2mm) reduces the coefficient of friction and reduces pressure loss. In addition, after the coolant enters the conical contraction port 5, the flow cross-sectional area is reduced to about one-third of the liquid guide channel 4, so the flow rate can be increased to about 3 times. Finally, the high-speed coolant passes through several parallel micro-branch tubes 6 inside the blade 2. The outlet of the branch tube is aligned with the outer wall of the blade to form a liquid film covering the cutting edge, which is more comprehensive and greatly reduces the temperature of the cutting zone.

[0027] Example 2, as Figure 5As shown, unlike Embodiment 1, the top of the liquid guide channel 4 can be located inside the tool holder 1. A pressure boosting chamber 7 is integrally formed on one side of the tool holder 1. The pressure boosting chamber 7 is connected to the inlet of the liquid guide channel 4, and the pressure boosting chamber 7 is a contracting conical design. The pressure boosting chamber 7 adopts an inclined structure design, and its axis forms a preset angle with the axis of the liquid guide channel 4. The outlet end of the pressure boosting chamber 7 and the inlet end of the liquid guide channel 4 are smoothly connected through an arc transition section. The angle at which the coolant cuts into the liquid guide channel 4 from the pressure boosting chamber 7 is between 30 and 45 degrees. The inner wall of the pressure boosting chamber 7 is provided with a spiral guide groove 8, and the pitch of the spiral guide groove 8 gradually decreases from the inlet end to the outlet end.

[0028] Optionally, the above structural design adds a pressure chamber 7. Although this increases the cost, during long-term high-load cutting operations, when the flow rate is increased solely by the change in the inner diameter of the liquid guide channel 4 and the constriction port 5, the cooling pump pressure fluctuation, local vaporization, and fluid friction loss will cause the cooling intensity of the tool tip to gradually decrease. Therefore, the pressure chamber 7 added in Embodiment 2, through the synergistic effect of its inclined constriction cavity and spiral guide groove 8, allows the coolant to form a high-speed vortex along the spiral guide groove 8 of the pressure chamber 7 before entering the liquid guide channel 4. The pressure is pre-increased by the centrifugal force of the fluid. Then, it smoothly cuts into the liquid guide channel 4 through the arc transition section. At this time, the vortex kinetic energy is converted into axial flow velocity. With the secondary acceleration of the constriction port 5, the coolant is sprayed to the tool tip at a higher speed through the micro-branch 6, forming a continuous and stable liquid film coverage. Even if the cooling pump pressure drops, the vortex energy stored in the pressure chamber 7 can still dynamically compensate for the flow rate, ensuring that the tool tip temperature remains within a controllable range during long-term cutting, significantly improving tool life and machining quality.

[0029] It should be noted that the technical components used in this case are all existing design methods, such as the contraction port 5, the spiral guide channel 8, and the pressurization chamber 7, etc. The detailed principles are not elaborated here.

[0030] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A cutting tool with a cooling structure, characterized by, include: A blade holder (1) has a blade (2) mounted on a blade head (3) fixed at the bottom of the blade holder (1). The top of the blade holder (1) is provided with a liquid guiding channel (4), and the inner end of the liquid guiding channel (4) is connected to a constriction port (5). The constriction port (5) is designed in a conical shape. The outlet end of the constriction port (5) is connected to several parallel micro-branch tubes (6) that pass through the blade (2). The outer end of the micro-branch tube (6) is aligned with the outer wall of the blade (2).

2. A cutting tool with a cooling structure as described in claim 1, characterized in that, The inner walls of the liquid guiding channel (4), the contraction port (5) and the micro-branch (6) are all covered with a protective coating (9), and the protective coating (9) is made of diamond.

3. A cutting tool with a cooling structure as described in claim 1, characterized in that, The top of the liquid guide channel (4) can be located inside the knife holder (1). A pressure boosting chamber (7) is integrally opened on one side of the knife holder (1). The pressure boosting chamber (7) is connected to the inlet of the liquid guide channel (4), and the pressure boosting chamber (7) is a contraction design.

4. A cutting tool with a cooling structure as described in claim 3, characterized in that, The pressurizing chamber (7) adopts an inclined structure design, and its axis forms a preset angle with the axis of the liquid guiding channel (4). The outlet end of the pressurizing chamber (7) and the inlet end of the liquid guiding channel (4) are smoothly connected through a circular arc transition section.

5. A cutting tool with a cooling structure as described in claim 3, characterized in that, The angle at which the coolant cuts into the liquid guide channel (4) from the pressurization chamber (7) is between 30 and 45 degrees.

6. A cutting tool with a cooling structure as described in claim 3, characterized in that, The inner wall of the pressurization chamber (7) is provided with a spiral guide groove (8), and the pitch of the spiral guide groove (8) gradually decreases from the inlet end to the outlet end.

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