A PCD end mill

Abstract

This invention discloses a PCD end mill, comprising a cutter head and multiple cutting edges protruding from the cutter head. Each cutting edge has a sharpened sidewall and an unsharpened sidewall. The multiple cutting edges are evenly spaced circumferentially. The sharpened sidewall of any cutting edge is opposite to the unsharpened sidewall of the adjacent cutting edge. A gap exists between the opposing sharpened and unsharpened sidewalls of two adjacent cutting edges, with the gap gradually increasing radially away from the central axis of the end mill. The angle between the bottoms of the two sidewalls along the radial direction of the end mill ranges from 20° to 25°. This invention forms a chip vent between adjacent sharpened and unsharpened sidewalls, ensuring smooth chip removal, minimizing chip accumulation that could lead to cutting edge breakage, and maximizing the flow of cutting fluid within the chip vent for cooling, thus preventing a decrease in the end mill's strength. Furthermore, within this angle range, the number of cutting edges can be significantly increased, improving the machining performance of the product.

Description

Technical Field

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

[0002] PCD end mills possess the advantages of diamond, such as high hardness, high wear resistance, low coefficient of friction, and high thermal conductivity. Therefore, they are widely used in machining non-ferrous metals and non-metallic materials.

[0003] Existing PCD end mills generally consist of a cutter body and PCD inserts. The number of PCD inserts can be one or more; the more inserts, the more cutting edges, and the better the machining performance of the product. However, simply increasing the number of PCD inserts can also affect the strength of the end mill, making it more prone to breakage during use.

[0004] Therefore, how to increase the number of cutting edges of a PCD end mill while ensuring strength has become a recognized technical challenge for those skilled in the art. Utility Model Content

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a PCD end mill, comprising a cutter head and a plurality of cutting edges protruding from the cutter head, each cutting edge having an open sidewall and an unopened sidewall, the plurality of cutting edges being arranged evenly spaced along the circumferential direction, the open sidewall of any cutting edge being opposite to the unopened sidewall of the adjacent cutting edge, a gap existing between the opposite open and unopened sidewalls of two adjacent cutting edges, the gap gradually increasing radially away from the central axis of the end mill, and the angle between the bottoms of the two sides along the radial direction of the end mill being between 20° and 25°.

[0006] Compared with the prior art, the beneficial effects of this utility model are as follows: By arranging the cutting edges evenly and sequentially along the circumferential direction on the cutter head, the sharpened sidewall of any cutting edge is positioned opposite to the unsharpened sidewall of the adjacent cutting edge. Thus, when the milling cutter is working, all sharpened sidewalls face the same circumferential direction for rotation. In addition, there is a gap between the opposing sharpened and unsharpened sidewalls of two adjacent cutting edges. The gap gradually increases radially away from the central axis of the milling cutter, and the angle between the bottoms of the two sidewalls along the radial direction of the milling cutter is between 20° and 25°. This forms a chip removal groove between the adjacent sharpened and unsharpened sidewalls. The width of the chip removal groove gradually increases, which can ensure the smooth discharge of chips, minimize chip accumulation that could lead to cutting edge breakage, and allow the cutting fluid to flow in the chip removal groove to achieve cooling, thus preventing a decrease in the strength of the milling cutter. Furthermore, within this angle range, the number of cutting edges can be greatly increased, improving the machining performance of the product.

[0007] Furthermore, the distance between the sharpened sidewall and the blade head is greater than the distance between the unsharpened sidewall and the blade head.

[0008] Furthermore, the distance between the sharpened sidewall and the axis of the milling cutter is less than the distance between the unsharpened sidewall and the axis of the milling cutter.

[0009] Furthermore, the blade has a first connecting sidewall and a second connecting sidewall that are arranged opposite to each other between the sharpened sidewall and the unsharpened sidewall. The distance between the first connecting sidewall and the axis is between 0.9mm and 1.1mm, and the distance between the second connecting sidewall and the axis is between 2.4mm and 2.6mm.

[0010] Furthermore, the connection point between the first connecting sidewall and the unsharpened sidewall of any blade is directly opposite the sharpened sidewall of the adjacent blade.

[0011] Furthermore, the distance between the sides of the cutting edge remains constant along the axial direction of the milling cutter.

[0012] Furthermore, the side of the cutting edge is inclined relative to the axial direction of the milling cutter, and the included angle between the cutting edge and the axial direction is between 10° and 15°.

[0013] Furthermore, the blade head and the cutting edge are an integral structure.

[0014] Furthermore, the number of blades is 16.

[0015] Furthermore, the thickness of the blade is between 0.25mm and 0.35mm. Attached Figure Description

[0016] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0017] Figure 1 This is a schematic diagram of the PCD end mill provided by this utility model; Figure 2 for Figure 1 Enlarged view of point A in the middle; Figure 3 for Figure 1 A side view of the tip portion of the provided PCD end mill; Figure 4 for Figure 1 A bottom view of the head section of the provided PCD end mill.

[0018] In the diagram: 1. Blade head; 2. Blade edge; 21. Sharpened sidewall; 22. Unsharpened bottomwall; 23. First connecting sidewall; 24. Second connecting sidewall. Detailed Implementation

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

[0020] In the description of this application, it should be understood that the terms "center", "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 application 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 application.

[0021] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0022] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0023] like Figure 1-4 As shown, this utility model provides a PCD end mill, including a cutter head 1 and a plurality of cutting edges 2 protruding from the cutter head 1. Each cutting edge 2 has an open sidewall 21 and an unopened sidewall 21. The plurality of cutting edges 2 are arranged evenly and sequentially along the circumference. The open sidewall 21 of any cutting edge 2 is opposite to the unopened sidewall 21 of the adjacent cutting edge 2. There is a gap between the opposite open sidewall 21 and unopened sidewall 21 of two adjacent cutting edges 2. The gap gradually increases radially away from the central axis of the end mill, and the angle between the bottoms of the two sides along the radial direction of the end mill is between 20° and 25°.

[0024] In this embodiment, the cutting edges 2 are evenly spaced along the circumference on the cutter head 1. The sharpened sidewall 21 of any cutting edge 2 is positioned opposite to the unsharpened sidewall 21 of the adjacent cutting edge 2. Thus, when the milling cutter is working, all the sharpened sidewalls 21 face the same circumferential rotation. In addition, there is a gap between the opposing sharpened and unsharpened sidewalls 21 of two adjacent cutting edges 2. The gap gradually increases radially away from the central axis of the milling cutter, and the angle between the bottoms of the two sidewalls along the radial direction of the milling cutter is between 20° and 25°. This forms a chip removal groove between the adjacent sharpened and unsharpened sidewalls 21. The width of the chip removal groove gradually increases, which can ensure the smooth discharge of chips, minimize the accumulation of chips that could lead to the breakage of the cutting edge 2, and also allow the cutting fluid to flow in the chip removal groove to achieve the purpose of cooling, thus avoiding a decrease in the strength of the milling cutter. Within this angle range, the number of cutting edges 2 can be greatly increased, improving the machining performance of the product.

[0025] For example, refer to Figure 4 The included angle between the sharpened sidewall 21 and the unsharpened sidewall 21 of two adjacent blades 2 is α, and the range of α is 20°~25°.

[0026] Preferably, to improve the cutting capability of the milling cutter, the distance between the sharpened sidewall 21 and the cutter head 1 is greater than the distance between the unsharpened sidewall 21 and the cutter head 1. This further increases the relative cutting area of ​​the sharpened sidewall 21 and improves the cutting force of the cutting edge 2.

[0027] Preferably, to improve the cutting capability of the milling cutter, the distance between the sharpened sidewall 21 and the axis of the milling cutter is smaller than the distance between the unsharpened sidewall 21 and the axis of the milling cutter. This further increases the relative cutting area of ​​the sharpened sidewall 21 and improves the cutting force of the cutting edge 2.

[0028] Preferably, refer to Figure 4 The blade 2 has a first connecting sidewall 23 and a second connecting sidewall 23 connected to each other between the sharpened sidewall 21 and the unsharpened sidewall 21. The distance between the first connecting sidewall 23 and the axis is between 0.9mm and 1.1mm, and the distance between the second connecting sidewall and the axis is between 2.4mm and 2.6mm. This distance, while ensuring the standard size of the end mill, maximizes the cutting force of the blade 2 and ensures sufficient spacing between adjacent blades 2 for the flow of cutting fluid and chip removal.

[0029] Preferably, refer to Figure 3The distance between the sides of the cutting edges 2 remains constant along the axial direction of the milling cutter. This further ensures that the number of cutting edges 2 can be increased while allowing sufficient space for chip removal.

[0030] Preferably, refer to Figure 3 The side of the cutting edge 2 is inclined relative to the axial direction of the milling cutter, and the angle between it and the axial direction is between 10° and 15°. For example, Figure 3 In this context, β is the angle between the side of the blade 2 and the axial direction.

[0031] Preferably, the cutter head 1 and the cutting edge 2 are an integral structure. A conventional end mill's cutter head 1 has a welding groove at its front end, and PCD inserts (i.e., cutting edges 2) are welded into the groove, with each PCD insert corresponding to one cutting edge 2. By making the cutter head 1 and the cutting edge 2 an integral structure, the cutter head 1 is not limited by a groove, thus avoiding the impact of welding the cutting edge 2 on the end mill's strength, thereby maximizing the number of cutting edges 2 that can be machined.

[0032] Preferably, the number of blades 2 is 16.

[0033] Preferably, the thickness of the cutting edge 2 is between 0.25mm and 0.35mm to further ensure the strength of the milling cutter.

[0034] In the specific implementation of the above embodiments, the technical features can be combined in any non-contradictory way. For the sake of brevity, not all possible combinations of the above technical features are described. However, as long as the combination of these technical features is not contradictory, it should be considered to be within the scope of this specification.

[0035] The specific embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A PCD milling tool, characterised in that, The tool includes a cutting head and multiple cutting edges protruding from the cutting head. Each cutting edge has a sharpened sidewall and an unsharpened sidewall. The multiple cutting edges are arranged evenly and sequentially along the circumference. The sharpened sidewall of any cutting edge is opposite to the unsharpened sidewall of the adjacent cutting edge. There is a gap between the opposing sharpened and unsharpened sidewalls of two adjacent cutting edges. The gap gradually increases radially away from the central axis of the milling cutter, and the angle between the bottoms of the two sides along the radial direction of the milling cutter is between 20° and 25°.

2. The PCD end mill according to claim 1, characterized in that, The distance of the sharpened sidewall from the blade head is greater than the distance of the unsharpened sidewall from the blade head.

3. The PCD end mill according to claim 1, characterized in that, The distance between the sharpened sidewall and the axis of the milling cutter is less than the distance between the unsharpened sidewall and the axis of the milling cutter.

4. The PCD end mill according to claim 3, characterized in that, The blade has a first connecting sidewall and a second connecting sidewall that are arranged opposite to each other between the sharpened sidewall and the unsharpened sidewall. The distance between the first connecting sidewall and the axis is between 0.9mm and 1.1mm, and the distance between the second connecting sidewall and the axis is between 2.4mm and 2.6mm.

5. The PCD end mill according to claim 4, characterized in that, The connection point between the first connecting sidewall and the unsharpened sidewall of any of the blades is directly opposite the sharpened sidewall of the adjacent blade.

6. The PCD end mill according to claim 1, characterized in that, The distance between the sides of any two adjacent cutting edges remains constant along the axial direction of the milling cutter.

7. The PCD end mill according to claim 6, characterized in that, The side of the cutting edge is inclined relative to the axial direction of the milling cutter, and the included angle between the cutting edge and the axial direction is between 10° and 15°.

8. The PCD end mill according to claim 1, characterized in that, The blade head and the blade edge are an integral structure.

9. The PCD end mill according to claim 1, characterized in that, The number of blades is 16.

10. The PCD end mill according to any one of claims 1-8, characterized in that, The thickness of the blade is between 0.25mm and 0.35mm.

Images