A high-strength carbide end mill

Abstract

This utility model discloses a high-strength carbide end mill, including a cutter head and a shank. Two sets of inserts are internally engaged at the top of the cutter head, and a connecting plate is mounted on one side of each insert. This utility model utilizes the inserts, connecting plate, connecting ring, and reinforcing ribs in conjunction. By inserting the two sets of inserts into the middle position between the cutter head and shank, with the connecting plate located at the connection point and the connecting ring fitting against the outer wall of the cutter head and shank, the connecting plate and connecting ring provide additional support and fixation at the middle position of the inserts, cutter head, and shank, making the connection between the inserts and shank more stable. The evenly arranged reinforcing ribs further enhance the structural strength and stability of the connection, enabling it to withstand the large cutting forces and torques generated during milling, reducing tool deformation and vibration during high-speed rotation and cutting, thereby extending the end mill's service life and improving its machining efficiency.

Description

Technical Field

[0001] This utility model relates to the field of milling cutter technology, specifically a high-strength carbide milling cutter. Background Technology

[0002] A milling cutter is a rotating cutting tool with one or more cutting teeth used for milling operations. It is mainly used on milling machines to machine planes, steps, grooves, shaped surfaces, and cut off workpieces.

[0003] High-speed rotation of a milling cutter allows for cutting of workpieces. When a milling cutter cuts a workpiece at high speed, the unsupported middle section is relatively weak due to insufficient support. Under the repeated action of cutting forces, this section bears enormous alternating stress. Especially during heavy-duty cutting or machining workpieces with high hardness or uneven material, the cutting force increases sharply, and the stress on the unsupported middle section also soars. Over time, this continuous stress causes tiny cracks to gradually form in the unsupported middle section. When the cracks expand to a certain extent, the milling cutter will suddenly break or deform at that location, resulting in a significant decrease in the cutting accuracy of the milling cutter, increased dimensional deviations in the machined workpiece, and deterioration in surface quality. This, in turn, affects the service life of the milling cutter and machining efficiency. Utility Model Content

[0004] The purpose of this invention is to provide a high-strength carbide end mill to solve the problems mentioned in the background art.

[0005] This utility model provides the following technical solution: a high-strength carbide end mill, including a cutter head and a cutter shank; two sets of inserts are engaged and installed inside the top of the cutter head, a connecting plate is installed on one side of the inserts, a connecting ring is installed on the side of the connecting plate away from the inserts, the connecting ring fits against the outer wall of the cutter head, multiple sets of reinforcing ribs are equidistantly installed on the outer surface of the connecting ring, a cutter shank is engaged and installed inside the top of the connecting ring, and a cooling mechanism is provided through the interior of the cutter head and the cutter shank.

[0006] Preferably, a fixing plate is installed through the inside of the connecting ring, and an operating rod is movably installed on the inner wall of the connecting ring at the moving end of the fixing plate. The cutter head and the cutter handle are provided with slots inside the operating rod.

[0007] Preferably, the inner walls of the blade head and the handle are provided with hexagonal grooves, and the outer walls of the two sets of inserts are hexagonal, fitting the inner walls of the hexagonal grooves.

[0008] Preferably, both the outer wall of the insert block and the inner wall of the connecting ring are provided with buffer pads.

[0009] Preferably, elastic components are installed inside the upper and lower ends of the insert block, and a sealing ring is provided on the side of the cutter head and the cutter handle near the elastic components.

[0010] Preferably, the cooling mechanism includes a cooling groove disposed inside the cutter head and the cutter handle, and the cutter head is provided with a dispersion groove near the bottom of the cooling groove.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] 1. This utility model uses insert blocks, connecting plates, connecting rings, and reinforcing ribs in combination. By inserting two sets of insert blocks into the middle position between the cutter head and the tool holder, the connecting plate is located at the connection between the cutter head and the tool holder, and the connecting ring fits against the outer wall of the cutter head and the tool holder. The connecting plate and connecting ring provide additional support and fixation for the middle position of the insert blocks, cutter head, and tool holder, making the connection between the insert blocks and the tool holder more stable. The evenly arranged reinforcing ribs can further enhance the structural strength and stability of the connection part, enabling it to withstand the large cutting forces and torques generated during milling, reducing the deformation and vibration of the tool during high-speed rotation and cutting, thereby extending the service life of the milling cutter and improving its processing efficiency.

[0013] 2. This utility model uses an elastic component and a sealing ring in combination. The elastic component allows the sealing ring to fit more tightly into the inside of the tool head and tool holder, which can effectively prevent the leakage of cooling medium, ensure the normal operation of the cooling system, improve cooling efficiency, and avoid the adverse effects of coolant leakage on machining, thereby improving the sealing performance between the tool head and tool holder and the insert block. Attached Figure Description

[0014] Figure 1 This is a front perspective view of the present utility model;

[0015] Figure 2 This is a schematic diagram of the side structure of the insert block of this utility model;

[0016] Figure 3 This is a schematic diagram of the side structure of the insert block of this utility model;

[0017] Figure 4 This is a schematic diagram of the cutter head structure of this utility model.

[0018] In the diagram: 1. Cutter head; 2. Cutter handle; 3. Insert block; 301. Connecting plate; 302. Connecting ring; 303. Reinforcing rib; 4. Elastic component; 401. Sealing ring; 5. Slot; 501. Fixing plate; 502. Operating lever; 6. Cooling mechanism; 601. Cooling tank; 602. Dispersion tank; 7. Hexagonal groove; 8. Buffer pad. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] The technical solution of this utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments;

[0021] Example:

[0022] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. Please refer to the accompanying drawings. Figures 1 to 4 This application provides a high-strength carbide end mill, please refer to it carefully. Figure 1 , Figure 2 and Figure 3 The device includes a cutting head 1 and a cutting handle 2. Two sets of inserts 3 are fitted inside the top of the cutting head 1. A connecting plate 301 is installed on one side of the inserts 3. A connecting ring 302 is installed on the side of the connecting plate 301 away from the inserts 3. The connecting ring 302 fits against the outer wall of the cutting head 1. Multiple sets of reinforcing ribs 303 are installed at equal intervals on the outer surface of the connecting ring 302. The cutting handle 2 is fitted inside the top of the connecting ring 302. A cooling mechanism 6 is provided through the inside of the cutting head 1 and the cutting handle 2.

[0023] Specifically, by inserting two sets of insert blocks 3 into the middle position between the cutter head 1 and the tool holder 2, the connecting plate 301 is located at the connection between the cutter head 1 and the tool holder 2, and the connecting ring 302 fits against the outer wall of the cutter head 1 and the tool holder 2. The connecting plate 301 and the connecting ring 302 provide additional support and fixation for the insert blocks 3, making the connection between the insert blocks 3 and the tool holder 2 more stable. In addition, multiple sets of reinforcing ribs 303 are provided on the outer surface of the connecting ring 302. Through the uniform arrangement of the reinforcing ribs 303, the structural strength and stability of the connection part can be further enhanced, which can withstand the large cutting force and torque generated during milling, and reduce the deformation and vibration of the tool during high-speed rotation and cutting. The cooling mechanism 6 runs through the inside of the cutter head 1 and the tool holder 2. During the milling process, it can deliver coolant to the cutting part of the tool, effectively reduce the temperature of the tool, avoid the tool from overheating and causing accelerated wear and reduced hardness, thereby extending the tool's service life and improving processing efficiency and quality.

[0024] Please refer to this carefully. Figure 2 , Figure 3 and Figure 4A fixing plate 501 is installed through the inside of the connecting ring 302. An operating lever 502 is installed on the inner wall of the connecting ring 302 at the moving end of the fixing plate 501. The cutter head 1 and the cutter handle 2 are provided with slots 5 inside the operating lever 502.

[0025] Specifically, to prevent the cutter head 1 and cutter handle 2 from shifting during the assembly of the cutter head 1, cutter handle 2 and insert block 3, when the insert block 3 is located between the cutter head 1 and cutter handle 2, the operator operates the operating lever 502, which drives the fixing plate 501 to move through the threaded ring structure, so that the fixing plate 501 is locked inside the slot 5, thereby preventing the cutter head 1 and cutter handle 2 from shifting.

[0026] Please refer to this carefully. Figure 2 , Figure 3 and Figure 4 The inner walls of the blade head 1 and the handle 2 are provided with hexagonal grooves 7, and the outer walls of the two sets of inserts 3 are hexagonal, fitting the inner walls of the hexagonal grooves 7.

[0027] Specifically, in order to achieve a better connection between the cutter head 1, the cutter holder 2, and the insert block 3, and to prevent the cutter head 1 and the cutter holder 2 from shifting during operation, two sets of insert blocks 3 are inserted into the hexagonal grooves 7 inside the cutter head 1 and the cutter holder 2. The hexagonal shape formed by the two sets of insert blocks 3 allows for multi-faceted contact and cooperation between the insert block 3 and the cutter head 1 and the cutter holder 2. Compared with other shapes, such as circles, this increases the stability and reliability of the connection. During the operation of the milling cutter, it can effectively transmit torque and prevent the insert block 3 from rotating relative to the cutter in the groove.

[0028] Please refer to this carefully. Figure 2 and Figure 3 Both the outer wall of the insert block 3 and the inner wall of the connecting ring 302 are provided with buffer pads 8.

[0029] Specifically, in order to reduce the collision between the insert block 3, connecting ring 302 and the cutter head 1 and cutter shank 2, the buffer pad 8 can absorb the impact and vibration energy generated during the operation of the tool, reduce the rigid collision between the insert block 3, connecting ring 302 and the cutter head 1 and cutter shank 2, reduce the risk of component damage caused by impact, and protect the structural integrity of the tool. Due to the presence of the buffer pad 8, the direct friction between the insert block 3, connecting ring 302 and the cutter head 1 and cutter shank 2 is reduced, which can slow down their wear rate, extend the service life of the insert block 3 and connecting ring 302, and thus improve the reliability and stability of the entire tool. At the same time, the buffer pad 8 can fill the small gaps between the insert block 3, connecting ring 302 and the cutter head 1 and cutter shank 2, making the connection tighter and more stable. When the tool rotates at high speed, it can effectively prevent its shaking or displacement, ensure the dynamic balance of the tool, and improve machining accuracy.

[0030] Please refer to this carefully. Figure 2 and Figure 3The upper and lower ends of the insert block 3 are equipped with elastic components 4. The cutter head 1 and the cutter handle 2 are provided with a sealing ring 401 on the side near the elastic component 4. The elastic component 4 is an elastic sheet.

[0031] Specifically, in order to improve the sealing performance between the cutter head 1 and the tool holder 2 and the insert block 3, the elastic component 4 makes the sealing ring 401 fit more tightly inside the cutter head 1 and the tool holder 2, which can effectively prevent the leakage of cooling medium. During milling, changes in the cooling system pressure inside the tool or tool vibration may cause gaps at the seal. The elastic force of the elastic component 4 can make the sealing ring 401 adapt to these changes and always maintain a good sealing state, ensuring the normal operation of the cooling system, improving cooling efficiency, and avoiding the adverse effects of coolant leakage on machining. Thus, the sealing performance between the cutter head 1 and the tool holder 2 and the insert block 3 can be improved.

[0032] Please refer to this carefully. Figure 1 and Figure 4 The cooling mechanism 6 includes a cooling groove 601 disposed inside the cutter head 1 and the cutter handle 2, and a dispersion groove 602 is provided at the bottom of the cutter head 1 near the cooling groove 601.

[0033] Specifically, in order to cool the cutting tool, the cooling tank 601 allows the cooling medium, such as coolant, to flow inside the tool head 1 and tool holder 2, carrying away the heat generated during the cutting process. This prevents the tool from overheating, which could lead to a decrease in hardness, accelerated wear, or even deformation, thereby extending the tool's service life and improving machining accuracy. Meanwhile, the dispersion tank 602 allows the cooling medium to be more evenly distributed in the tool head 1, effectively carrying away heat from different parts of the tool head 1, preventing localized overheating, ensuring the uniformity of the overall tool temperature, and further improving the tool's performance and machining quality.

[0034] Working principle: By inserting two sets of insert blocks 3 into the middle position between the cutter head 1 and the tool holder 2, the connecting plate 301 is located at the connection between the cutter head 1 and the tool holder 2, and the connecting ring 302 fits against the outer wall of the cutter head 1 and the tool holder 2. Then, the two sets of connecting rings 302 are assembled and fixed with bolts. At the same time, the elastic component 4 will make the sealing ring 401 fit more tightly against the inside of the cutter head 1 and the tool holder 2. The operator then operates the operating rod 502, which drives the fixing plate 501 to move through the threaded ring structure, so that the fixing plate 501 is locked inside the slot 5, which can prevent the cutter head 1 and the tool holder 2 from shifting. Then, the tool is installed and used. The workpiece can be cut by the high-speed rotation of the tool.

[0035] Finally, it should be noted that the above specific embodiments are only used to illustrate the technical solution of this utility model and not to limit it. Although this utility model has been described in detail with reference to the embodiments, those skilled in the art should understand that modifications and equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications and substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A high-strength carbide end mill, comprising a cutter head (1) and a cutter shank (2); characterized in that: Two sets of inserts (3) are fitted inside the top of the cutter head (1). A connecting plate (301) is installed on one side of the insert (3). A connecting ring (302) is installed on the side of the connecting plate (301) away from the insert (3). The connecting ring (302) fits against the outer wall of the cutter head (1). Multiple sets of reinforcing ribs (303) are installed at equal intervals on the outer surface of the connecting ring (302). A handle (2) is fitted inside the top of the connecting ring (302). A cooling mechanism (6) is provided through the interior of the cutter head (1) and the handle (2).

2. The high-strength carbide end mill according to claim 1, characterized in that: A fixing plate (501) is installed through the inside of the connecting ring (302). An operating rod (502) is installed on the inner wall of the connecting ring (302) at the moving end of the fixing plate (501). The cutter head (1) and the handle (2) are provided with slots (5) inside the operating rod (502).

3. A high-strength carbide end mill according to claim 2, characterized in that: The inner walls of the blade head (1) and the handle (2) are provided with hexagonal grooves (7), and the outer walls of the two sets of inserts (3) are hexagonal, fitting the inner walls of the hexagonal grooves (7).

4. A high-strength carbide end mill according to claim 3, characterized in that: Both the outer wall of the insert (3) and the inner wall of the connecting ring (302) are provided with buffer pads (8).

5. A high-strength carbide end mill according to claim 4, characterized in that: The upper and lower ends of the insert (3) are equipped with elastic components (4), and the blade (1) and the handle (2) are provided with sealing rings (401) on the side near the elastic components (4).

6. A high-strength carbide end mill according to claim 1, characterized in that: The cooling mechanism (6) includes a cooling groove (601) disposed inside the cutter head (1) and the handle (2), and the cutter head (1) is provided with a dispersion groove (602) near the bottom of the cooling groove (601).

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