Tool bit with long service life

Abstract

The utility model discloses a long-service-life tool bit, and belongs to the technical field of tool bits. A long-service-life tool bit comprises a fixing sleeve, connecting plates are arranged on the outer walls of the two sides of the fixing sleeve, a tool is rotationally connected into the fixing sleeve in a sleeved mode, a guide groove is formed in the outer wall of the circumference of the fixing sleeve, a protective cooling sleeve is connected into the guide groove in a sleeved mode, and a sealing cover is arranged at the bottom of the protective cooling sleeve. The sealing cover and the protective cooling sleeve can jointly form a relatively closed space, so that the cutter is effectively shielded and protected, dust attached to the surface of the cutter can be remarkably reduced, and the drying plate in the sealing cover can positively play a role in moisture absorption, so that the drying effect is improved, and the service life of the cutter is prolonged. And moisture in a closed environment is adsorbed, so that the erosion influence of humid air on the cutter is reduced, the stable performance of the cutter is ensured to the greatest extent, and the service life of the cutter is effectively prolonged.

Description

Technical Field

[0001] This utility model relates to the field of cutting tool technology, and more specifically, to a cutting tool with a long service life. Background Technology

[0002] CNC lathes are mainly used for cutting shaft-type or disc-type parts. The cutting head is a tool used for cutting in mechanical manufacturing and is also an important part of CNC machine tools.

[0003] During machining, the cutting tool and the workpiece generate intense friction due to cutting, releasing a large amount of heat. If the tool body cannot be cooled and dissipated in time, the excessively high temperature will change the material properties of the tool body and the end face of the workpiece, resulting in problems such as decreased hardness and structural deformation, which will damage the tool body and the workpiece and seriously affect the service life of the tool tip. Currently, cutting fluid spraying is commonly used to cool high-temperature tool tips. However, in a confined working environment, although the use of a large amount of cutting fluid can achieve the cooling purpose, it will significantly increase the cooling cost. At the same time, the spraying of cutting fluid will cover the work platform with liquid. This liquid may seep into the equipment gaps and mix with the machining debris. In the subsequent cleaning, a lot of manpower and time are required to wipe and clean the liquid on the equipment surface and the ground. Cleaning the machining debris will also be more difficult due to the adhesion of the liquid, which greatly increases the complexity and workload of the cleaning work and reduces the overall work efficiency.

[0004] Moreover, when not in use, existing blades are often exposed to the air and lack a certain protective structure. Oxygen and water vapor can cause metal oxidation, resulting in rust on the blade surface, dulling of the cutting edge, and affecting dimensional accuracy. At the same time, dust and impurities will accumulate, which will accelerate the wear of the blade during subsequent use, reduce its service life and cutting efficiency, and cause many inconveniences in actual use.

[0005] Regarding the above issues, the application number and application name are as recorded.

[0006] Although the device has many beneficial effects, the following problems still exist:

[0007] In view of this, we propose a long-life cutting tip. Utility Model Content

[0008] 1. Technical problems to be solved

[0009] The purpose of this invention is to provide a long-life cutting head to solve the problems mentioned in the background art.

[0010] 2. Technical Solution

[0011] A long-life cutting tool includes a fixed sleeve, connecting plates on both outer walls of the fixed sleeve, threaded holes on the top of multiple connecting plates, a cutting tool rotatably fitted inside the fixed sleeve, a guide groove on the outer circumference of the fixed sleeve, a protective cooling sleeve fitted inside the guide groove, and a sealing cap at the bottom of the protective cooling sleeve.

[0012] Preferably, the inner wall of the protective cooling jacket is provided with a guide block that matches the guide groove, and the outer wall of the protective cooling jacket is provided with a support plate and a cooling vortex tube.

[0013] Preferably, the support plate has a fixing bolt threaded inside, and a threaded groove matching the fixing bolt is opened on the bottom of one side of the support plate.

[0014] Preferably, the protective cooling sleeve has a cavity one inside, the bottom of the protective cooling sleeve is open, the mounting sleeve has a cavity two inside, the inner wall of the cavity has a cold air outlet, and the cavity one and the cavity two are interconnected.

[0015] Preferably, a drying plate is snapped onto the top of the sealing cover, and a rotating post is provided at the bottom of the sealing cover.

[0016] Preferably, a fixing block is provided on the top of the cutter, and a fixing bolt hole is provided on the side wall of the fixing block.

[0017] 3. Beneficial effects

[0018] Compared with existing technologies, the advantages of this utility model are as follows: When the cutting head is performing cutting operations, compressed gas is first injected into the cooling vortex tube. This key component, the cooling vortex tube, can convert the input compressed air into energy, turning it into a cold source. Subsequently, the cold source is transported into the protective cooling jacket. Since the protective cooling jacket and the mounting sleeve are interconnected, the cold source will naturally enter the mounting sleeve. Then, through multiple cold air outlets set on the inner wall of the mounting sleeve, the cold source is precisely blown onto the cutting tool. This cold air quickly envelops the high-temperature cutting tool, achieving rapid cooling of the tool that generates heat during the cutting process. Compared with the traditional cooling method that relies on spraying large amounts of cutting fluid, this method has significant advantages. On the one hand, it eliminates the need to purchase, store, and dispose of large amounts of cutting fluid, greatly reducing cooling costs. On the other hand, it effectively avoids the situation where the work platform is covered with liquid due to cutting fluid spraying, reducing many troubles in subsequent cleaning work, such as wiping the equipment surface, cleaning up liquid on the ground, and dealing with machining debris that becomes difficult to handle due to liquid adhesion. It significantly improves the cleanliness of the working environment and work efficiency.

[0019] When the tool is not in use, the protection and maintenance work should be carried out in the following steps: First, loosen the fixing bolt so that it is disengaged from the threaded groove at the bottom of the support plate on one side. At this time, the protective cooling jacket will begin to move downward under its own weight until it completely covers the tool. Then, install the sealing cover with the drying plate at the bottom of the mounting sleeve through the threaded connection. In this way, the sealing cover and the protective cooling jacket together form a relatively closed space, which effectively protects the tool and significantly reduces the adhesion of dust to the tool surface. Moreover, the drying plate inside the sealing cover can actively play a moisture-absorbing role, adsorbing the moisture in the closed environment, thereby reducing the corrosive effect of humid air on the tool, ensuring the stability of the tool's performance to the greatest extent, effectively extending the tool's service life, and providing a strong guarantee for the long-term reliable use of the tool. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0021] Figure 2 This is a schematic diagram of the overall disassembly structure of this utility model;

[0022] Figure 3 This is a schematic diagram of the mounting sleeve structure of this utility model;

[0023] The following are the labels in the diagram: 100, fixing sleeve; 110, connecting plate; 120, guide groove; 130, cutting tool; 131, fixing block; 200, protective cooling sleeve; 210, guide block; 220, cooling vortex tube; 230, support plate; 240, fixing bolt; 250, mounting sleeve; 251, cold air outlet; 300, sealing cover; 310, drying plate; 320, rotating column. Detailed Implementation

[0024] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0025] In the description of this utility model, "multiple" means two or more, unless otherwise explicitly specified.

[0026] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0027] Please see Figure 1-3 This utility model provides a technical solution:

[0028] A long-life cutting tool includes a fixed sleeve 100, connecting plates 110 are provided on the outer walls of both sides of the fixed sleeve 100, and threaded holes are opened on the top of multiple connecting plates 110. A cutting tool 130 is rotatably sleeved inside the fixed sleeve 100. A guide groove 120 is opened on the outer circumference of the fixed sleeve 100, and a protective cooling sleeve 200 is sleeved inside the guide groove 120. A sealing cap 300 is provided at the bottom of the protective cooling sleeve 200.

[0029] Specifically, the inner wall of the protective cooling jacket 200 is provided with a guide block 210 that matches the guide groove 120, and the outer wall of the protective cooling jacket 200 is provided with a support plate 230 and a cooling vortex tube 220.

[0030] In some embodiments, the cooling vortex tube 200 mainly consists of a nozzle, a vortex chamber, a cold end tube, a hot end tube, and a hot end regulating valve. Its cooling principle is as follows: compressed and cooled gas enters the nozzle, expands and accelerates to the speed of sound within the nozzle, and is injected tangentially into the vortex chamber, forming a free vortex. The rotational angular velocity of the free vortex increases closer to the center. Due to the difference in angular velocity, friction is generated between the layers of the free vortex. The airflow angular velocity is greatest in the central part, and the friction results in energy being transferred to the outer layer airflow with a lower angular velocity. The airflow in the central layer loses energy, has low kinetic energy, and its speed and temperature decrease. It is then drawn out from one end through the orifice plate in the center of the vortex tube, obtaining the cold airflow required for cooling. Meanwhile, the airflow in the outer layer gains momentum, its kinetic energy increases, and it also rubs against the turbine tube wall, converting some of its kinetic energy into heat energy. This heat energy is drawn out from the other end of the vortex tube through the control valve, forming a hot airflow. The flow rate and temperature of the cold and hot airflows can be adjusted by controlling the control valve. This is prior art.

[0031] Furthermore, the support plate 230 has a threaded fixing bolt 240 inside, and a threaded groove matching the fixing bolt 240 is opened at the bottom of one side of the support plate 230, which facilitates the fixing of the protective cooling sleeve 200 during cutting.

[0032] In some embodiments, multiple support plates 230 are fixed to the surface of the cutting motor with bolts, and the cutting tool 130 is fixed to the output end of the cutting motor with bolts.

[0033] Furthermore, the protective cooling sleeve 200 has an internal cavity 1, the bottom of the protective cooling sleeve 200 is open, the mounting sleeve 250 has an internal cavity 2, the inner wall of the cavity has a cold air outlet 251, and the cavity 1 and cavity 2 are interconnected to facilitate the transfer of cold source.

[0034] Furthermore, a drying plate 310 is snapped onto the top of the sealing cover 300, and a rotating post 320 is provided at the bottom of the sealing cover 300 to facilitate moisture absorption and drying of the tool 130 within the protective environment.

[0035] It is worth noting that a fixing block 131 is provided on the top of the tool 130, and a fixing bolt hole is provided on the side wall of the fixing block 131, which makes it easy to fix the tool 130 on the output end of the cutting motor.

[0036] In addition, the circuits, electronic components and modules involved in this utility model are all existing technologies, which can be fully implemented by those skilled in the art, and need not be elaborated upon. The content protected by this utility model does not involve any improvement to the internal structure and method.

[0037] Working Principle: When the cutting head is performing cutting operations, compressed gas is first injected into the cooling vortex tube 220. This key component, the cooling vortex tube 220, converts the input compressed air into a cold source. The cold source is then transported into the protective cooling jacket 200. Since the protective cooling jacket 200 and the mounting sleeve 250 are interconnected, the cold source enters the mounting sleeve 250. Then, through multiple cold air outlets 251 on the inner wall of the mounting sleeve 250, the cold source is precisely blown onto the cutting tool 130. This cold air quickly envelops the high-temperature cutting tool 130, achieving rapid cooling of the tool 30 that generates heat during cutting. Compared with traditional cooling methods that rely on large amounts of cutting fluid spraying, this method has significant advantages. On the one hand, it eliminates the need to purchase, store, and dispose of large quantities of cutting fluid, greatly reducing cooling costs. On the other hand, it effectively avoids the situation where the work platform is covered in liquid due to cutting fluid spraying, reducing subsequent cleaning tasks such as wiping equipment surfaces, cleaning up liquid residue, and dealing with machining debris that becomes difficult to handle due to liquid adhesion. This significantly improves the cleanliness and efficiency of the working environment. When the tool 130 is not in use, the protection and maintenance work is carried out in the following steps: First, loosen the fixing bolt 240 so that it is disengaged from the threaded groove at the bottom of the support plate 110. At this time, the protective cooling sleeve 200 begins to move downward under its own weight until it completely covers the tool 130. Then, the sealing cover 300 carrying the drying plate 310 is installed at the bottom of the mounting sleeve 250 by means of threaded connection. In this way, the sealing cover 300 and the protective cooling sleeve 200 together form a relatively closed space, which effectively protects the tool 130 and can significantly reduce the adhesion of dust on the surface of the tool 130. Moreover, the drying plate 310 inside the sealing cover 300 can actively play a moisture-absorbing role, adsorbing the moisture in the closed environment, thereby reducing the corrosive effect of humid air on the tool 130, maximizing the stability of the tool 130's performance, effectively extending the service life of the tool 130, and providing a strong guarantee for the long-term reliable use of the tool 130.

[0038] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A long life tool bit comprising a holder (100) characterised in that: The both sides of the fixed sleeve (100) are provided with connecting plates (110), a plurality of thread holes are opened in the top of the connecting plates (110), the fixed sleeve (100) is rotatably sleeved with a cutter (130) inside, the circumferential outer wall of the fixed sleeve (100) is provided with a guide groove (120), the guide groove (120) is sleeved with a protective cooling sleeve (200) inside, and the protective cooling sleeve (200) is provided with a sealing cover (300) at the bottom.

2. A long-life cutting head according to claim 1, wherein: The inner wall of the protective cooling sleeve (200) is provided with a guide block (210) matched with the guide groove (120), and the outer wall of the protective cooling sleeve (200) is provided with a supporting plate (230) and a cooling vortex tube (220).

3. A long-life cutting head according to claim 2, wherein: The inner thread of the supporting plate (230) is sleeved with a fixing bolt (240), and the bottom of the supporting plate (230) on one side is provided with a threaded groove matched with the fixing bolt (240).

4. A long-life cutting head according to claim 3, wherein: The protective cooling sleeve (200) is internally provided with a cavity one, the bottom of the protective cooling sleeve (200) is open, the inner part of the mounting sleeve (250) is provided with a cavity two, the inner wall of the cavity is provided with a cold air outlet (251), and the cavity one and the cavity two are communicated.

5. A long-life cutting head according to claim 4, wherein: The top of the sealing cover (300) is clamped with a drying plate (310), and the bottom of the sealing cover (300) is provided with a rotating column (320).

6. A long-life cutting head according to claim 5, wherein: The top of the cutter (130) is provided with a fixing block (131), and the side wall of the fixing block (131) is provided with a fixing bolt hole.

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