PCD (Poly Crystal Diamond) multi-edge milling cutter

Abstract

The utility model discloses a PCD (Poly Crystal Diamond) multi-edge milling cutter which comprises a cutter bar and a cutter head, the cutter bar is used for fixing the milling cutter on a cutter handle or a machine tool spindle and comprises a main body and a positioning piece, the main body is a cylinder, and the positioning piece is a hexagonal pyramid table and is formed by machining at one end of the main body; the tool bit is used for cutting a to-be-machined workpiece and comprises a blade part and a positioning groove. The positioning groove is formed in the bottom of the blade part and is in a hexagonal pyramid shape matched with the positioning piece; the tool bar and the tool bit are connected through the positioning piece and the positioning groove, and the positioning piece is in interference fit with the positioning groove so that stable and accurate connection of the tool bar and the tool bit can be improved. According to the milling cutter, the positioning piece and the positioning groove are in interference fit, so that the cutter bar and the cutter head are connected more stably, displacement caused by subsequent welding and other machining is avoided, the irregular shapes of the positioning piece and the positioning groove enable coaxial connection of the cutter bar and the cutter head to be more accurate, meanwhile, the shape of the cutter head does not need to be adjusted in a large range, machining time of the milling cutter is shortened, and production efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of grinding tools, in particular to a PCD multi-edge milling cutter. Background Art

[0002] PCD multi-edge milling cutters are suitable for machining non-ferrous metals (such as aluminum, copper, and titanium) and non-metallic materials (such as glass). For example, some laptop casings are made of aluminum alloy, and multi-edge milling cutters are often used to machine the frames of these cases. Currently, most PCD multi-edge milling cutters suffer from manufacturing variations between the cutter head and the shank, resulting in misalignment of the axes. This results in deviations when machining the workpiece, reducing the yield rate.

[0003] To address this issue, existing techniques propose welding the cutter head to the tool shank before further machining the blade and adjusting the shape of the cutter head to achieve axial symmetry between the head and the tool shank. While this method improves the precision of the connection between the cutter head and the tool shank, adjusting the shape of the cutter head consumes processing time, reducing production efficiency. Summary of the Invention

[0004] In order to further improve the machining accuracy of workpieces and the production efficiency of milling cutters, the utility model proposes a PCD multi-edge milling cutter.

[0005] Based on the above purpose, the utility model provides a PCD multi-edge milling cutter, comprising: a cutter bar and a cutter head;

[0006] The tool bar is used to fix the milling cutter on the tool handle or the machine tool spindle, and includes: a main body and a positioning piece, the positioning piece is a hexagonal frustum, and the positioning piece is formed by machining one end of the main body;

[0007] The cutter head is used for cutting the workpiece to be processed, and includes: a blade portion and a positioning groove; the blade portion includes a blade for contacting and cutting the workpiece to be processed; the positioning groove is arranged at the bottom of the blade portion, and its shape is a hexagonal pyramid that matches the positioning piece; the tool rod and the cutter head are coaxially connected to the positioning groove through the positioning piece respectively, and the positioning piece is interference fit with the positioning groove.

[0008] Optionally, the positioning piece is formed by laser cutting at one end of the main body.

[0009] Optionally, the interference between the positioning groove and the positioning member is 0.1 thread.

[0010] Optionally, the cutter rod and the cutter head are fixedly connected by welding.

[0011] Optionally, the blade portion further includes: a blade groove; the blade and the blade groove are spaced apart.

[0012] Optionally, the blade includes three cutting surfaces: a positive cutting surface, a front cutting surface and a rear cutting surface; the front cutting surface of the blade forms an angle of 45°-60° with the concentric circle tangent of the blade head, and the rear cutting surface forms an angle of 120°-135° with the concentric circle tangent of the blade head.

[0013] Optionally, the cutter head forms a cutter groove every 8°-12°.

[0014] Optionally, the blade portion also includes: a first frustum blade surface, a cylindrical blade surface, and a second frustum blade surface; wherein the two ends of the cylindrical blade surface are respectively connected to the first frustum blade surface and the second frustum blade surface; a plurality of the blades and a plurality of the blade grooves are arranged on the first frustum blade surface, the cylindrical blade surface, and the second frustum blade surface.

[0015] Optionally, the radii of both ends of the first frustum cutting edge surface and the second frustum cutting edge surface are greater than or equal to the radius of the cylindrical cutting edge surface.

[0016] The utility model has the following beneficial effects:

[0017] This PCD multi-edge milling cutter utilizes an interference fit between the locating element and the locating slot, creating a more stable connection between the shank and the cutter head, preventing displacement caused by subsequent welding and other processing. Furthermore, the hexagonal pyramids of the locating element and the locating slot cooperate with each other, creating an irregular positioning connection that allows for a more precise coaxial connection between the shank and the cutter head. By first stabilizing and precisely axially connecting the shank and the cutter head before welding, the cutter head shape can be adjusted, and the blades and grooves can be machined. This eliminates the need for extensive cutter head shape adjustments, reducing the processing time for adjusting the cutter head shape and improving milling cutter production efficiency.

[0018] The radii of both ends of the first frustum cutting edge surface and the second frustum cutting edge surface of the multi-blade portion of the utility model are greater than or equal to the radius of the cylindrical cutting edge surface. The first frustum cutting edge surface and the second frustum cutting edge surface limit the workpiece to be processed within the cutting edge range of the cutter head, thereby avoiding inaccurate milling cutter processing position.

[0019] The cutter head of the utility model forms a cutter groove every 8°-12°, thereby ensuring the rigidity of the cutting edge and increasing the service life of the milling cutter, while ensuring the processing accuracy of the milling cutter. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of an embodiment of the utility model;

[0021] Figure 2 This is an exploded view of the structure of an embodiment of the present invention;

[0022] Figure 3 This is an exploded schematic diagram of the structure of an embodiment of the utility model from another perspective;

[0023] Figure 4 It is a schematic cross-sectional view of the structure AA of an embodiment of the present utility model.

[0024] Description of Figure Numbers:

[0025] Tool bar 1; main body 11; positioning member 12;

[0026] Cutting head 2; cutting edge portion 21; first frustum cutting edge surface 211; cylindrical cutting edge surface 212; second frustum cutting edge surface 213; cutting edge 214; positive cutting surface 2141; front cutting surface 2142; rear cutting surface 2143; cutting groove 215; positioning groove 22. DETAILED DESCRIPTION

[0027] To make the above-mentioned objects, features, and advantages of the present invention more clearly understood, the following detailed description of specific embodiments of the present invention is provided in conjunction with the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways than those described herein, and those skilled in the art may make similar modifications without departing from the scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0028] Reference Figure 1-3 A PCD multi-blade milling cutter includes: a tool rod 1 and a cutter head 2, wherein the tool rod 1 is used to fix the milling cutter on a tool holder or a machine tool spindle, and the cutter head 2 is used to cut the workpiece to be machined, wherein the tool rod 1 is coaxially connected to the cutter head 2.

[0029] The shank 1 includes a main body 11 and a positioning member 12 , wherein the main body 11 is a cylinder, the positioning member 12 is arranged at one end of the main body 11 , the positioning member 12 is a hexagonal pyramid, and the positioning member 12 is formed by laser cutting at one end of the main body 11 .

[0030] The cutter head 2 includes a blade portion 21 and a positioning groove 22. The blade portion 21 includes a first frustum-conical blade surface 211, a cylindrical blade surface 212, a second frustum-conical blade surface 213, a blade 214, and a blade groove 215. The two ends of the cylindrical blade surface 212 are respectively connected to the first frustum-conical blade surface 211 and the second frustum-conical blade surface 213. A plurality of blades 214 and a plurality of blade grooves 215 are provided on the first frustum-conical blade surface 211, the cylindrical blade surface 212, and the second frustum-conical blade surface 213.

[0031] The positioning groove 22 is provided at the bottom of the blade portion 21 and is shaped like a hexagonal pyramid that matches the positioning member 12. The shank 1 and the cutter head 2 are connected to the positioning groove 22 via the positioning member 12. The positioning member 12 and the positioning groove 22 have an interference fit to improve the stability of the connection between the shank 1 and the cutter head 2 and the accuracy of the shaft connection. The interference fit between the positioning groove 22 and the positioning member 12 is determined based on the tool and welding accuracy. In this embodiment, the interference fit is 0.1 thread. The shank 1 and the cutter head 2 are fixedly connected by welding.

[0032] Furthermore, the positioning member 12 is provided on a bottom surface of the main body 11 and the positioning member 12 is coaxial with the main body, and the positioning groove 22 is coaxial with the blade portion.

[0033] Furthermore, the radii at both ends of the first frustum cutting edge surface 211 and the second frustum cutting edge surface 213 are greater than or equal to the radius of the cylindrical cutting edge surface. The first frustum cutting edge surface 211 and the second frustum cutting edge surface 213 are used to limit the workpiece to be processed within the range of the cutting edge 214 of the cutter head 2, thereby avoiding inaccurate milling cutter processing position.

[0034] Furthermore, the plurality of blades 214 and the plurality of knife grooves 215 are formed by cutting the first frustum blade surface 211, the cylindrical blade surface 212 and the second frustum blade surface 213 by laser. Figure 4 The blade 214 is used for cutting the workpiece to be processed and includes: a positive cutting surface 2141, a front cutting surface 2142 and a rear cutting surface 2143. The tool groove 215 is used to discharge processing waste. The blade 214 and the tool groove 215 are spaced apart. The number of the blades and the tool grooves can be selected according to the cutting accuracy and rigidity requirements. The more the blades, the higher the cutting accuracy and the lower the rigidity. Conversely, the lower the cutting accuracy, the higher the rigidity. In order to ensure high cutting accuracy and rigidity, the tool head in this embodiment forms a tool groove 215 every 8°-12°.

[0035] The angle formed by the intersection of the front cutting surface 2142 and the positive cutting surface 2141 of the blade 214 is a first angle. The size of the first angle is selected according to the cutting accuracy. In this embodiment, the first angle is 10°.

[0036] The angle formed between the front cutting surface 2142 of the blade 214 and the concentric circle tangent of the blade head 2 is 45°-60°, and the angle formed between the rear cutting surface 2143 and the concentric circle tangent of the blade head 2 is 120°-135°.

[0037] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0038] The above-described embodiments merely represent several implementation methods of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. A PCD multi-edge milling cutter, characterized in that: include: A cutter bar (1) and a cutter head (2); The tool bar (1) is used to fix the milling cutter on a tool handle or a machine tool spindle, and comprises: a main body (11) and a positioning member (12), wherein the positioning member (12) is a hexagonal frustum, and the positioning member (12) is formed by machining one end of the main body (11); The cutter head (2) is used for cutting a workpiece to be processed, and comprises: a blade portion (21) and a positioning groove (22); the blade portion (21) comprises a blade (214) for contacting and cutting the workpiece to be processed; the positioning groove (22) is arranged at the bottom of the blade portion (21), and its shape is a hexagonal pyramid matching the positioning member (12); the tool rod (1) and the cutter head (2) are coaxially connected to the positioning groove (22) through the positioning member (12), and the positioning member (12) and the positioning groove (22) are interference fit.

2. The PCD multi-edge milling cutter according to claim 1, characterized in that: The positioning piece (12) is formed by laser cutting at one end of the main body (11).

3. The PCD multi-edge milling cutter according to claim 1, characterized in that: The interference between the positioning groove (22) and the positioning member (12) is 0.1 thread.

4. The PCD multi-edge milling cutter according to claim 1, characterized in that: The cutter rod (1) and the cutter head (2) are fixedly connected by welding.

5. The PCD multi-edge milling cutter according to claim 1, characterized in that: The blade portion (21) further includes a blade groove (215); the blade (214) and the blade groove (215) are spaced apart.

6. The PCD multi-edge milling cutter according to claim 5, characterized in that: The blade (214) comprises three cutting surfaces: a front cutting surface (2141), a front cutting surface (2142) and a rear cutting surface (2143); the front cutting surface of the blade (214) forms an angle of 45°-60° with the concentric circle tangent of the blade head (2), and the rear cutting surface forms an angle of 120°-135° with the concentric circle tangent of the blade head (2).

7. The PCD multi-edge milling cutter according to claim 5, characterized in that: The cutter head (2) is machined to form a cutter groove (215) every 8°-12°.

8. The PCD multi-edge milling cutter according to any one of claims 5 to 7, characterized in that: The blade portion (21) further comprises: a first frustum blade surface (211), a cylindrical blade surface (212), and a second frustum blade surface (213); wherein both ends of the cylindrical blade surface (212) are respectively connected to the first frustum blade surface (211) and the second frustum blade surface (213); and a plurality of blades (214) and a plurality of knife grooves (215) are arranged on the first frustum blade surface (211), the cylindrical blade surface (212), and the second frustum blade surface (213).

9. The PCD multi-edge milling cutter according to claim 8, characterized in that: The radii of the first frustum blade surface (211) and the second frustum blade surface (213) are greater than or equal to the radius of the cylindrical blade surface.

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