A ball-end multi-functional end mill

Abstract

This utility model relates to the field of cutting tool technology, and more particularly to a ball-end multi-functional end mill, comprising a shank and a cutter body. The cutter body is fixedly connected to the end of the shank, and a spherical tool holder is fixedly connected to the top of the cutter body. A spherical cutting insert is mounted on the spherical tool holder. A linear tool holder is provided on the cutter body, and a linear cutting insert is mounted on the linear tool holder. The linear tool holder includes multiple teeth spirally distributed along the outer circumference of the cutter body, and at least two chip removal grooves are spirally extended along the outer circumference of the cutter body surface. The cross-section of the chip removal groove is U-shaped, and the groove depth gradually increases from the top to the bottom of the cutter body. This utility model solves the problems of low efficiency, complex operation, and easy error caused by traditional multi-tool switching methods in the machining process.

Description

Technical Field

[0001] This utility model relates to the field of cutting tool technology, and in particular to a ball end mill. Background Technology

[0002] In the woodworking and metalworking industries, achieving complex geometries and precision machining requirements often necessitates the use of multiple types of cutting tools. Traditional machining methods typically rely on a series of single-function tools, such as ball end mills and end mills, to perform operations like round hole machining, contour milling, and grooving. However, this multi-tool switching approach has significant limitations and shortcomings.

[0003] Frequent tool changes lead to inefficiency: Changing tools for each specific type of machining task not only increases non-productive time consumption but also raises operational complexity and the risk of errors. Frequent tool changes introduce additional tool setting errors, posing a challenge to the dimensional accuracy and surface quality of the final product. Single-function tools cannot meet diverse needs: Single-function tools such as ordinary ball end mills cannot cover all types of machining requirements.

[0004] In order to solve the above-mentioned technical problems, this utility model designs a ball-end multi-functional end mill. Utility Model Content

[0005] This utility model provides a ball end mill with multiple functions, aiming to solve the problems of low efficiency, complex operation, and easy error caused by traditional multi-tool switching methods in the machining process. The technical solution is as follows: A ball-end multi-functional end mill includes a shank and a cutter body. The cutter body is fixedly connected to the end of the shank, and a spherical tool holder is fixedly connected to the top of the cutter body. A spherical cutting insert is mounted on the spherical tool holder. A linear tool holder is provided on the cutter body, and a linear cutting insert is mounted on the linear tool holder. The linear tool holder includes a plurality of teeth spirally distributed along the outer circumference of the cutter body, and at least two chip removal grooves are provided on the surface of the cutter body spirally extending along the outer circumference.

[0006] Based on the above technical solution, the cross-section of the chip removal groove is U-shaped, and the groove depth gradually increases from the top of the cutter body to the bottom.

[0007] Based on the above technical solution, the outer side of the spherical cutting blade is arc-shaped.

[0008] Preferably, the cutting edge of the straight-edged insert is continuously connected to the edge of the spherical cutting insert and extends along a spiral line to the end of the cutter body.

[0009] Beneficial effects Compared with existing technologies, the beneficial effects of this utility model are: 1. By integrating two types of cutting inserts, processing efficiency and flexibility are improved, reducing the need for frequent tool changes between different processing tasks. This not only saves tool change time but also reduces operational complexity and the risk of errors, making the processing more efficient and flexible. 2. The use of diamond-made spherical cutting inserts and straight-edged inserts, along with an optimized chip removal groove, ensures high precision and excellent surface finish. This design not only improves workpiece quality but also enhances processing stability by reducing problems caused by chip clogging. Attached Figure Description

[0010] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only one embodiment of this utility model. For those skilled in the art, other embodiments can be derived from the provided drawings without creative effort.

[0011] Figure 1 : A schematic diagram of the structure of this utility model; Figure 2 : A schematic diagram showing the position of the tool holder of this utility model; Figure 3 Top view of this utility model. Detailed Implementation

[0012] The present invention will be further described below with reference to the accompanying drawings and examples: The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0013] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0014] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0015] like Figure 1 and Figure 2 As shown, a ball-end mill includes a shank 1 and a cutter body. The cutter body is fixed to the end of the shank 1. The shank is responsible for effectively transmitting the power torque and axial force from the machine tool spindle to the cutter body and its cutting edge. A robust and well-designed shank ensures efficient power transmission, reduces energy loss, and supports precise cutting operations on various materials.

[0016] The top of the tool body is fixed to a spherical tool holder 3, and a spherical cutting insert 4 is mounted on the spherical tool holder 3. The outer side of the spherical cutting insert 4 is arc-shaped. The spherical cutting insert 4 is used for machining round-bottomed holes. When machining with the spherical cutting insert 4, the spherical head directly participates in the forming process of the bottom hole. Because the outer side of the spherical cutting insert 4 is arc-shaped, it can cut into the workpiece material in a rotating manner, thereby forming a hole with a circular bottom. This type of hole is usually called a round-bottomed hole or a spherical recess.

[0017] The final shape and size of the bottom hole depend directly on the diameter of the ball end mill (i.e., the ball end portion). If a bottom hole of different size or depth is required, a milling cutter with a ball end mill of the corresponding diameter can be selected. A larger ball end diameter will produce a larger diameter bottom hole, while a smaller ball end diameter is suitable for manufacturing a smaller diameter bottom hole. Therefore, by changing the ball end mill 4 to different diameters, different machining requirements can be flexibly adapted without replacing the entire tool.

[0018] like Figure 3 As shown, there are two spherical tool holders 3 and two spherical cutting inserts 4. Using two spherical cutting inserts 4 helps to distribute the cutting force more evenly. This reduces the load on a single insert, lowers the wear rate, and extends the tool life.

[0019] A straight blade holder 5 is provided on the blade body, and a straight blade 6 is installed on the straight blade holder 5; the straight blade holder 5 includes a plurality of teeth spirally distributed along the outer periphery of the blade body.

[0020] The straight-blade insert 6 is primarily used for milling contours and sidewalls.

[0021] The cutting edge of the straight-edged insert 6 continuously connects to the edge of the spherical cutting insert 4 and extends along a helix to the end of the tool body. This design allows the tool to provide a continuous cutting path when machining contours or sidewalls, thereby achieving a smooth and uninterrupted material removal process.

[0022] The blade body surface is provided with at least two chip removal grooves 7 extending spirally along the outer periphery.

[0023] The chip removal groove 7 has a U-shaped cross-section, with the groove depth gradually increasing from the top to the bottom of the tool body. This effectively removes chips from the cutting area, preventing chip accumulation and ensuring optimal machining results. The spirally arranged straight-edged inserts 6, combined with the corresponding chip removal groove 7, provide excellent chip removal performance, which is crucial for maintaining workpiece surface quality and extending tool life. The U-shaped cross-section increases the space of the chip removal groove 7, making it easier for chips to enter and be discharged through the groove.

[0024] The linear tool holder 5 has three feed teeth. These three feed teeth can evenly distribute the cutting force, preventing any single feed tooth from bearing excessive pressure. This not only helps extend the tool's lifespan but also reduces the decrease in machining accuracy caused by excessive localized wear.

[0025] Preferably, five sets of spiral linear tool holders are provided, each set including three teeth, the spiral is set on the tool body, and chip removal grooves 7 are provided on adjacent tool holders 5, for a total of four chip removal grooves 7.

[0026] The spherical cutting insert 4 and the straight cutting insert 6 are made of diamond. Diamond inserts can operate under extremely high strength and are not easily worn. This makes the tool ideal for machining extremely hard materials.

[0027] This multi-functional milling cutter is designed for a variety of machining operations, including round bottom hole machining, contour milling, circular groove machining, and drilling.

[0028] When machining a round-bottomed hole, the workpiece is milled using the top spherical cutting insert 4 to create a hole with a circular bottom. The shape and diameter of the round-bottomed hole depend on the dimensions of the spherical end portion.

[0029] When milling contours or sidewalls, continuous cutting action is provided by the helically arranged straight cutting inserts 6 and chip removal grooves 7, allowing for circumferential milling along the workpiece contours or sidewalls. This ensures a smooth transition during material removal and helps to effectively remove chips, maintaining a good surface finish.

[0030] When milling a circular groove, the ball-shaped cutting insert 4 and the straight cutting insert 6 are combined. The spherical cutting insert 4 is used to start the groove forming. At the same time, the groove is gradually deepened and widened by axial or radial feed, in conjunction with the straight cutting tool holder 5, until the required size and shape are achieved.

[0031] The present invention has been described above by way of example, but the present invention is not limited to the specific embodiments described above. Any modifications or variations made based on the present invention shall fall within the scope of protection claimed by the present invention.

Claims

1. A ball nose universal milling cutter characterized by: The tool includes a handle (1) and a tool body. The end of the handle (1) is fixed to the tool body. The top of the tool body is fixed to a spherical tool holder (3). A spherical cutting insert (4) is installed on the spherical tool holder (3). A straight tool holder (5) is provided on the tool body. A straight cutting insert (6) is installed on the straight tool holder (5). The straight tool holder (5) includes multiple teeth that are spirally distributed along the outer periphery of the tool body. The surface of the tool body is provided with at least two chip removal grooves (7) that extend spirally along the outer periphery.

2. The ball-end universal cutter according to claim 1, wherein: The cross-section of the chip removal groove (7) is U-shaped, and the groove depth gradually increases from the top of the cutter body to the bottom.

3. The ball-end universal cutter according to claim 2, wherein: The outer side of the spherical cutting blade (4) is arc-shaped.

4. The ball-end universal cutter according to claim 2, wherein: The cutting edge of the straight cutting blade (6) is continuously connected to the edge of the spherical cutting blade (4) and extends along a spiral line to the end of the blade body.

5. The ball-end universal cutter according to claim 1, wherein: The number of the spherical tool holder (3) and the spherical cutting insert (4) is two.

6. The ball-end universal cutter according to claim 1, wherein: The spherical cutting insert (4) and the straight cutting insert (6) are made of diamond.

7. The ball-end universal cutter according to claim 1, wherein: The number of teeth on the straight cutter holder (5) is 3.

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