A straight flute end mill and power tool

Abstract

This invention relates to the field of tool technology, and discloses a straight flute end mill and a power tool. The power tool includes a tool body and a straight flute end mill, wherein the tool body can drive the straight flute end mill to rotate. The straight flute end mill includes a shank and a cutter body connected to the shank. The cutter body has a plurality of cutting edges arranged circumferentially thereon. Each cutting edge has a main cutting edge and a rake face. The plane formed by the main cutting edge and the central axis of the cutter body forms a rake angle α with the rake face, which is between 10° and 40°. The straight flute end mill of this invention, by reasonably setting the rake angle α, reduces the cutting resistance of the straight flute end mill during machining, improves the cutting efficiency of the straight flute end mill, and ensures a smooth cutting surface while improving machining efficiency. The power tool of this invention, by setting the above-mentioned straight flute end mill, produces workpieces with good surface quality and high machining efficiency.

Description

Technical Field

[0001] This invention relates to the field of tool technology, and more particularly to a straight flute end mill and a power tool. Background Technology

[0002] The power milling cutter is one of the most widely used power tools in woodworking, capable of creating various edge shapes and complex tenons. It consists of the machine body and a slotting cutter mounted on the machine body, such as... Figure 1 As shown, a straight flute end mill includes a shank 1 and a cutter body 2, with several cutting edges 3 arranged circumferentially on the cutter body 2. In the prior art, the rake angle α of the cutting edges 3 is generally set between 0° and 5° (rake angle: the angle between the plane formed by the cutting edge 31 of the cutting edge 3 and the central axis 22 of the cutter body 2 and the rake face 32 of the cutting edge 3). Therefore, during the milling process, the cutting edge experiences greater cutting resistance, resulting in low machining efficiency.

[0003] Therefore, there is an urgent need for a straight flute end mill and power tool to solve the above-mentioned technical problems. Summary of the Invention

[0004] One object of the present invention is to provide a straight flute end mill that can reduce the resistance encountered by the straight flute end mill during the cutting process and improve the cutting efficiency.

[0005] Another object of the present invention is to provide a power tool that achieves high machining efficiency by using the aforementioned straight flute end mill.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] A straight flute end mill includes a shank and a cutter body connected to the shank. The cutter body has a plurality of cutting edges arranged circumferentially thereon. Each cutting edge has a main cutting edge and a rake face. The plane formed by the main cutting edge and the central axis of the cutter body forms a rake angle α with an angle of 10° to 40° with the rake face.

[0008] As an alternative, an L-shaped groove is provided on the rake face at a certain distance from the main cutting edge, and the groove extends along the axial direction of the blade body.

[0009] As an alternative, the cutting edge has a functional surface parallel to the axial direction of the cutting body, and the inner wall of the groove at the end away from the main cutting edge intersects with the functional surface to form a chip-breaking cutting edge, which is configured to cut the cutting chips generated by the main cutting edge.

[0010] As an alternative, the angle between the inner wall of the groove at the end furthest from the main cutting edge and the functional surface is β, where β is an acute angle.

[0011] As an alternative, the blade is made of cemented carbide.

[0012] As an alternative, the blade body is provided with several L-shaped grooves, and one blade is fixedly connected in each L-shaped groove.

[0013] As an alternative, the blade is welded to the blade body.

[0014] An electric tool includes a tool body and a straight flute cutter, the tool body being capable of driving the straight flute cutter to rotate.

[0015] As an alternative, the fluting cutter can be detachably connected to the tool body.

[0016] As an alternative, the tool body is a bakelite milling machine.

[0017] The beneficial effects of this invention are:

[0018] The straight flute end mill of the present invention reduces the cutting resistance during machining by reasonably setting the rake angle α, thereby improving the cutting efficiency of the straight flute end mill and ensuring a smooth cutting surface while improving machining efficiency.

[0019] The power tool of the present invention, by setting the above-mentioned straight flute end mill, produces workpieces with good surface quality and high processing efficiency. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the end face of a straight flute end mill provided by existing technology;

[0021] Figure 2 This is a three-dimensional structural schematic diagram of the straight flute end mill provided in a specific embodiment of the present invention;

[0022] Figure 3 yes Figure 2 Enlarged view of point A in the image;

[0023] Figure 4 This is a schematic diagram of the end face of a straight flute end mill provided in a specific embodiment of the present invention.

[0024] In the picture:

[0025] 10′-Handle; 20′-Body; 30′-Edge; 31′-Cutting edge; 32′-Front face;

[0026] 10-Handle;

[0027] 20 - Tool body; 21 - L-shaped groove;

[0028] 30-Cutting edge; 31-Main cutting edge; 32-Front face; 33-Groove; 34-Functional surface; 35-Chip breaking edge; 36-Rear face; 37-First mating surface; 38-Second mating surface. Detailed Implementation

[0029] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the invention. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention and not the entire structure.

[0030] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0031] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0032] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, 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 the present invention. In addition, the terms "first" and "second" are used only for distinction in description and have no special meaning.

[0033] This embodiment provides a fluting cutter and a power tool. The power tool includes a tool body and a fluting cutter, which is detachably connected to the tool body. The tool body includes a motor, and the fluting cutter is connected to the output end of the motor, thereby enabling the tool body to drive the fluting cutter to rotate, facilitating the machining of workpieces. Specifically, in this embodiment, the tool body is a wood milling machine, which is mainly used for machining wooden workpieces, capable of various edge shaping and complex tenon joints. The wood milling machine is a relatively mature device in the prior art, and its specific structure will not be described in detail here. In other embodiments, the tool body may also be an electric drill, etc., and is not limited here.

[0034] like Figure 2 As shown, the spur cutter includes a shank 10 and a cutter body 20 connected to the shank 10. The cutter body 20 has a plurality of cutting edges 30 arranged circumferentially thereon. The shank 10 is used to connect to the output end of the tool body, and the cutting edges 30 are used to cut the workpiece. The spur cutter can be connected to the output end of the tool body in the following ways: the output end of the tool body holds the shank 10 with jaws; or the output end of the tool body is provided with a slot, and the shank 10 is inserted into the slot; or the output end of the tool body is connected to the shank 10 with bolts or other fasteners. The choice of setting can be made according to actual needs and is not limited here. In this embodiment, the shank 10 has a cylindrical structure, and the end of the cutter body 20 connected to the shank 10 is also a cylindrical structure. The cutter body 20 and the shank 10 are coaxially arranged, and the diameter of the shank 10 is slightly larger than the diameter of the end of the cutter body 20 connected to the shank 10, so as to facilitate finer machining on the surface of the cutter body 20 when manufacturing the spur cutter. In this embodiment, the straight flute end mill has two cutting edges 30 arranged circumferentially along the cutter body 20, and the two cutting edges 30 are centrally symmetrically arranged to ensure the stability of the straight flute end mill during rotation. In other embodiments, the straight flute end mill may include three or more cutting edges 30, as long as the multiple cutting edges 30 are evenly arranged circumferentially along the cutter body 20.

[0035] Preferably, such as Figures 2-4 As shown, the cutting edge 30 has a rake face 32 and a flank face 36, respectively parallel to the central axis of the cutting edge 20, at one end away from the central axis of the cutting edge 20. The rake face 32 and the flank face 36 intersect to form a main cutting edge 31 parallel to the central axis of the cutting edge 20. The main cutting edge 31 is used to cut the surface of the workpiece to be cut. Preferably, an L-shaped groove 33 is provided on the rake face 32 at a certain distance from the main cutting edge 31, and the groove 33 extends along the axial direction of the cutting edge 20. During the cutting process of the straight flute end mill, one main cutting edge 31 cuts the cutting surface of the workpiece and generates cutting chips. At this time, one end of the cutting chip is still connected to the cutting surface, and the L-shaped groove 33 is close to the main cutting edge 31, so it can quickly and effectively break the cutting chip, thereby avoiding the cutting surface from being torn by the cutting chip due to excessively long cutting chips, ensuring a smooth cutting surface, and improving the machining quality. The power tool of this embodiment, by setting the above-mentioned straight flute end mill, produces workpieces with good surface quality.

[0036] In this embodiment, as Figure 3 and Figure 4 As shown, the inner wall of the L-shaped groove 33 near the main cutting edge 31 smoothly transitions with the rake face 32.

[0037] Preferably, such as Figure 3 and Figure 4As shown, the cutting edge 30 also has a functional surface 34 parallel to the axial direction of the tool body 20. The inner wall of the groove 33 at the end away from the main cutting edge 31 intersects with the functional surface 34 to form a chip-breaking cutting edge 35. The chip-breaking cutting edge 35 also extends along the axial direction of the tool body 20. When the cutting chips generated by the main cutting edge 31 are not broken by the groove 33, the chip-breaking cutting edge 35 can cut the cutting chips. That is, the L-shaped groove 33 and the chip-breaking cutting edge 35 cooperate to more reliably cut the cutting chips generated by the main cutting edge 31, preventing the cutting chips from being too long and causing the workpiece to be torn.

[0038] Furthermore, such as Figure 4 As shown, the angle between the inner wall of the groove 33 at the end away from the main cutting edge 31 and the functional surface 34 is β, where β is an acute angle. This makes the chip-breaking cutting edge 35 sharper, so as to effectively cut the cutting chips generated by the main cutting edge 31. Of course, in other embodiments, β can also be set to a right angle as needed.

[0039] The angle between the plane formed by the central axis of the main cutting edge 31 and the tool body 20 and the rake face 32 is called the rake angle α. The rake angle α is 10° to 40°. Further, the rake angle α is 10° to 15°. Further, the rake angle α is 15° to 25°. Further, the rake angle α is 25° to 40°. Compared with the prior art, this embodiment significantly increases the value of the rake angle α, thereby greatly reducing the cutting resistance of the cutting edge 30, making the feed of the straight flute end mill smoother, resulting in a smoother and flatter machined surface, and improving the machining quality of the workpiece.

[0040] Preferably, in this embodiment, the cutting edge 30 and the cutter body 20 are formed separately, and the cutting edge 30 is made of cemented carbide. Cemented carbide has advantages such as high hardness, high strength, wear resistance, and heat resistance, which not only enables the straight flute end mill to provide better cutting force to meet the requirements of machining workpieces with high hardness, but also makes it less prone to wear and has a long service life. Cemented carbide material is relatively expensive. In this embodiment, only the cutting edge 30 is made of cemented carbide, while the cutter body 20 and the shank 10 are made of other common metal materials, which can reduce the manufacturing cost of the straight flute end mill.

[0041] Optionally, the blade 30 and the blade body 20 can be connected by welding, bonding, etc., and the setting can be selected according to actual needs. There is no limitation here.

[0042] In this embodiment, the blade 30 also includes a first mating surface 37 and a second mating surface 38, both of which are parallel to the axis of the blade body 20. The two ends of the first mating surface 37 are connected to the rear blade surface 36 and the second mating surface 38, respectively. The two ends of the second mating surface 38 are connected to the first mating surface 37 and the functional surface 34, respectively. At this time, the first mating surface 37, the second mating surface 38, the functional surface 34, the inner wall of the groove 33, the front blade surface 32 and the rear blade surface 36 are sequentially connected and form the side surface of the blade 30. The first mating surface 37 and the second mating surface 38 are arranged perpendicularly.

[0043] Preferably, such as Figure 3 and Figure 4 As shown, the cutter body 20 has two L-shaped grooves 21 arranged circumferentially. The L-shaped grooves 21 extend along the axial direction of the cutter body 20, and the two L-shaped grooves 21 are centrally symmetrical about the central axis of the cutter body 20. Each cutting edge 30 is fixed in one L-shaped groove 21. Specifically, the first mating surface 37 and the second mating surface 38 of the cutting edge 30 abut against the two side walls of the L-shaped groove 21, respectively. On the one hand, during the installation of the cutting edge 30 onto the cutter body 20, the L-shaped groove 21 can position the cutting edge 30; on the other hand, during the cutting process of the main cutting edge 31, the workpiece will exert a reverse force on the cutting edge 30, and at this time, the two side walls of the L-shaped groove 21 can support and limit the cutting edge 30, ensuring the stability of the cutting edge 30's position throughout the cutting process, thereby ensuring good machining quality. It can be understood that in other embodiments, the specific number of L-shaped grooves 21 can be set according to the number of cutting edges 30.

[0044] Furthermore, such as Figure 4 As shown, the first mating surface 37 extends beyond the circumferential surface of the cutter body 20, so that the flank face 36 and the main cutting edge 31 are both located outside the circumferential surface of the cutter body 20, ensuring that the cutting edge 30 can work effectively, and the cutter body 20 will not come into contact with the cutting surface and wear.

[0045] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. For those skilled in the art, based on the concept of the present invention, there will be changes in specific implementation methods and application scope. The content of this specification should not be construed as a limitation of the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the claims of the present invention.

Claims

1. A straight flute cutter comprising a shank (10) and a cutter body (20) connected to the shank (10), the cutter body (20) being arranged with a number of cutting edges (30) along its circumference, characterized in that, The blade (30) has a main cutting edge (31) and a front cutting surface (32). The plane formed by the main cutting edge (31) and the central axis of the blade body (20) forms a front angle α with the front cutting surface (32). The front angle α is 10°~40°. An L-shaped groove (33) is provided on the front cutting face (32) at a certain distance from the main cutting edge (31), and the groove (33) extends along the axial direction of the blade body (20); The cutting edge (30) has a functional surface (34) parallel to the axial direction of the blade body (20). The inner wall of the groove (33) at the end away from the main cutting edge (31) intersects with the functional surface (34) to form a chip-breaking cutting edge (35). The chip-breaking cutting edge (35) is configured to cut off the cutting chips generated by the main cutting edge (31).

2. The straight fluted cutter as claimed in claim 1, wherein, The angle between the inner wall of the groove (33) at the end away from the main cutting edge (31) and the functional surface (34) is β, where β is an acute angle.

3. The straight fluted cutter according to claim 2 wherein, The blade (30) is made of cemented carbide.

4. A straight fluted milling cutter according to any one of claims 1 to 3 wherein, The blade body (20) is provided with a plurality of L-shaped grooves (21), and a blade (30) is fixedly connected in each L-shaped groove (21).

5. A straight fluted cutter according to any one of claims 1 to 3 wherein, The blade (30) is welded to the blade body (20).

6. An electric power tool characterized by comprising: It includes a tool body and a straight flute end mill as described in any one of claims 1-5, wherein the tool body is capable of driving the straight flute end mill to rotate.

7. The power tool of claim 6, wherein, The straight flute end mill is detachably connected to the tool body.

8. The power tool of claim 7, wherein, The tool body is a bakelite milling machine.

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