Machining equipment and formed milling cutter thereof

Abstract

The utility model relates to the technical field of metal cutting, in particular to machining equipment and a formed milling cutter thereof. The forming milling cutter comprises a cutter handle and a cutter head arranged at one end of the cutter handle, a plurality of cutting edges are arranged on the peripheral side of the cutter head at intervals, each cutting edge comprises a circumferential edge, an end edge and an arc-shaped bottom edge, the arc-shaped bottom edge is arranged between the circumferential edge and the end edge and comprises a first arc edge and a second arc edge which are connected, and the first arc edge is close to the cutter handle relative to the second arc edge. The end, away from the second arc blade, of the first arc blade is connected with the circumferential blade, and the end, away from the first arc blade, of the second arc blade is connected with the end blade. According to the formed milling cutter, the bottom blade is designed into the arc-shaped structure, so that the contact surface of the cutting surface of the cutter tip and a workpiece can be increased, the cutting stress point of the blade tip and the chip form are improved, and the performance and the service life of the formed milling cutter are improved; the multiple cutting edges are designed, the feeding amount and the cutting resistance of each tooth can be reduced, and the service life of the formed milling cutter is further prolonged.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of metal cutting, in particular to a machining device and a profile milling cutter thereof. BACKGROUND

[0002] With the rapid development of 3C mobile phone industry, the performance requirements of mobile phone frames increase, and titanium alloy materials with high strength and better chemical stability are used in 3C mobile phone frames. However, due to the material characteristics of titanium alloy, such as low thermal conductivity, low elastic coefficient and strong chemical activity, the processing difficulty is relatively high.

[0003] Most of the bottom edges of the profile milling cutters for processing titanium alloy are designed as flat edges. However, after processing, the bottom edge tip is seriously worn and broken, which reduces the service life of the profile milling cutter. CONTENT OF THE INVENTION

[0004] In view of the above situation, it is necessary to provide a machining device and a profile milling cutter thereof to improve the cutting quality of the workpiece and prolong the service life of the profile milling cutter.

[0005] In order to achieve the above purpose, the present application discloses a profile milling cutter, which comprises a handle and a cutter head arranged at one end of the handle, a plurality of cutting edges are arranged at the outer circumferential side of the cutter head, each cutting edge comprises a circumferential edge, an end edge and an arc-shaped bottom edge, the arc-shaped bottom edge is arranged between the circumferential edge and the end edge, the arc-shaped bottom edge comprises a first arc edge and a second arc edge connected with each other, the first arc edge is closer to the handle relative to the second arc edge, one end of the first arc edge away from the second arc edge is connected with the circumferential edge, one end of the second arc edge away from the first arc edge is connected with the end edge, and the radius of the first arc edge is smaller than the radius of the second arc edge.

[0006] In the profile milling cutter, the bottom edge is designed as an arc-shaped structure, which can increase the contact surface between the cutting edge tip and the workpiece, improve the cutting stress point of the edge tip and the chip shape, and further improve the performance and service life of the profile milling cutter; the radii of the first arc edge and the second arc edge are different, which can adapt to different cutting depths and cutting conditions, the first arc edge with smaller radius can more flexibly adapt to the curvature change of the workpiece, and the second arc edge with larger radius can help to perform more stable cutting in the relatively flat area, thereby improving the cutting efficiency and surface quality; by designing the cutting edge as a plurality of cutting edges, the feed per tooth and the cutting resistance can be reduced, and the service life of the profile milling cutter is further improved.

[0007] As an optional embodiment, in the embodiment of the present application, a plurality of division angles are formed between the tangent line of the arc-shaped bottom edge and the axis of the profile milling cutter, and the plurality of division angles are not equal.

[0008] As an optional implementation, in the embodiments of the present application, the core diameter of the tool head ranges from 4.1 mm to 4.5 mm, and the peripheral edge rake angle of the tool head ranges from 5° to 7°.

[0009] As an optional implementation, in the embodiments of the present application, the radius of the first arc edge ranges from 0.2 mm to 0.4 mm, and the radius of the second arc edge ranges from 4.5 mm to 6 mm.

[0010] As an optional implementation, in the embodiments of the present application, the peripheral edge relief angle of the tool head ranges from 8° to 10°.

[0011] As an optional implementation, in the embodiments of the present application, the end edge rake angle of the tool head ranges from 3° to 5°, and the end edge relief angle of the tool head ranges from 5° to 8°.

[0012] As an optional implementation, in the embodiments of the present application, a tool groove is formed between two adjacent cutting edges, the tool groove is a spiral groove, and the spiral angle of the tool groove ranges from 38° to 40°.

[0013] As an optional implementation, in the embodiments of the present application, the length of the arc-shaped bottom edge along the axial direction of the tool head ranges from 0.3 mm to 0.6 mm.

[0014] As an optional implementation, in the embodiments of the present application, the cutting edges are five, and the included angles between the tangent lines of the arc-shaped bottom edges of the five cutting edges and the axis of the profile milling cutter are 75°, 69°, 75°, 69°, and 75°, respectively.

[0015] To achieve the above-mentioned purpose, the present application further discloses a machining equipment comprising a clamp and the profile milling cutter as any one of the above-mentioned, the clamp is used for clamping a workpiece, and the profile milling cutter is used for milling the workpiece.

[0016] In the above-mentioned machining equipment, by designing the bottom edge as an arc structure, the contact surface of the tool tip cutting surface and the workpiece can be increased, the blade tip cutting stress point and the chip shape can be improved, and thus the performance and the service life of the profile milling cutter can be improved; the radii of the first arc edge and the second arc edge are different, which can adapt to different cutting depths and cutting conditions, the first arc edge with a smaller radius can more flexibly adapt to the curvature change of the workpiece, and the second arc edge with a larger radius can help to perform more stable cutting in a relatively flat area, thereby improving the cutting efficiency and the surface quality; by designing the cutting edges as multiple, the feed per tooth and the cutting resistance can be reduced, and the service life of the profile milling cutter can be further improved. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 A schematic diagram of a planar structure of a profile milling cutter is provided for the embodiments of the present application.

[0019] Figure 2 As shown in the front view of the profile milling cutter. Figure 1 As shown in the front view of the profile milling cutter.

[0020] Figure 3 As shown in the top view of the profile milling cutter. Figure 1 As shown in the top view of the profile milling cutter.

[0021] Main element symbols: profile milling cutter 100, shank 10, tool bit 20, cutting edge 21, peripheral edge 201, end edge 202, arc-shaped bottom edge 211, first arc edge 211a, second arc edge 212a, tool groove 22. DETAILED DESCRIPTION

[0022] The embodiments of the present application will be described in detail below, and examples of the embodiments are shown in the drawings, wherein the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present application, and cannot be understood as a limitation of the present application.

[0023] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the term "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or electrically connected or can communicate with each other; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above-mentioned term in the present application can be understood according to the specific circumstances.

[0024] The disclosure below provides many different embodiments or examples for implementing different structures of the present application. For the sake of simplicity, the description below of the specific examples will not be exhaustive of the disclosure. Indeed, the present application can be practiced in a variety of ways. Accordingly, other embodiments and examples of the present application will be suggested to those skilled in the art by this disclosure. Further, this disclosure provides examples of various specific processes and materials. However, one skilled in the art will recognize that other processes and / or materials can be used without departing from the present application. The present application will be described with respect to the following drawings in which the

[0025] The embodiments of the present application will be described in detail below with reference to the drawings.

[0026] Referring to Figure 1 and Figure 2 , the embodiment of the present application provides a profile milling cutter 100 for cutting workpieces, in the embodiment, the workpieces are made of titanium alloy material. Specifically, the profile milling cutter 100 includes a shank 10 and a head 20.

[0027] The shank 10 is in the shape of a cylinder, and the head 20 is arranged at one end of the shank 10, wherein the shank 10 and the head 20 are an integral structure. In the embodiment, a tapered reinforcing portion is further arranged between the head 20 and the shank 10.

[0028] The head 20 is provided with a plurality of cutting edges 21 arranged at intervals on the outer periphery, please see Figure 3 each cutting edge 21 includes a peripheral edge 201, an end edge 202, and an arc-shaped bottom edge 211 arranged between the peripheral edge 201 and the end edge 202, the arc-shaped bottom edge 211 includes a first arc edge 211a and a second arc edge 212a connected to each other, the first arc edge 211a is closer to the shank 10 relative to the second arc edge 212a, one end of the first arc edge 211a away from the second arc edge 212a is connected to the peripheral edge 201, one end of the second arc edge 212a away from the first arc edge 211a is connected to the end edge 202, the radius of the first arc edge 211a is smaller than the radius of the second arc edge 212a. The extension direction of the first arc edge 211a is substantially consistent with the peripheral edge 201, and the extension direction of the second arc edge 212a is substantially consistent with the end edge 202.

[0029] As an optional embodiment, in the embodiment of the present application, the radius r1 of the first arc edge 211a ranges from 0.2 mm to 0.4 mm. The radius r2 of the second arc edge 212a ranges from 4.5 mm to 6 mm. Preferably, the radius r1 of the first arc edge 211a is 0.3 mm, and the radius r2 of the second arc edge 212a is 5.18 mm. In this way, the smaller radius helps to improve the strength of the cutting edge, while the larger radius can improve the smoothness of the machined surface and reduce surface roughness.

[0030] As an optional embodiment, in the embodiment of the present application, the tangent of the arc bottom edge 211 forms an index angle β with the axis O of the profile milling cutter 100, and the plurality of index angles β are not equal.

[0031] Specifically, the cutting edge 21 is five, and correspondingly, the index angle β is also five, and the five index angles β are 75°, 69°, 75°, 69°, and 75° in turn. Through the design of different index angles β, the cutting force distribution can be more uniform, the load of a single cutting edge 21 can be reduced, the service life of the profile milling cutter 100 can be prolonged, and the smoothness of the machined surface can be improved. The non-uniformly distributed index angle β helps to reduce vibration and noise during cutting, especially at high speed, this design can improve the stability of machining. Different index angles β help to improve the formation and discharge of chips, reduce the contact time between chips and cutting edges 21, reduce the cutting temperature, and avoid chip jamming and overheating of the profile milling cutter 100. Different index angles β help to improve the strength and durability of the profile milling cutter 100, especially when machining materials with high hardness, reasonable index angles β can reduce the wear of the profile milling cutter 100.

[0032] As an optional embodiment, in the embodiment of the present application, the core diameter d1 of the tool head 20 ranges from 4.1 mm to 4.5 mm. The core diameter d1 in this range can ensure that the profile milling cutter 100 has a certain rigidity, while maintaining sufficient chip space.

[0033] As an optional embodiment, in the embodiment of the present application, the peripheral edge 201 of the tool head 20 has a rake angle α1 ranging from 5° to 7°. The peripheral edge 201 of the tool head 20 has a rake angle α1 ranging from 5° to 7°, which can reduce cutting force and cutting heat, thereby reducing power consumption and reducing friction between the profile milling cutter 100 and the workpiece; and the peripheral edge 201 of the tool head 20 has a rake angle α1 ranging from 5° to 7°, which helps to balance the sharpness and strength of the profile milling cutter 100, ensuring that the profile milling cutter 100 is neither too fragile nor too blunt; in addition, the peripheral edge 201 of the tool head 20 has a rake angle α1 ranging from 5° to 7°, which helps to obtain a better surface finish.

[0034] As an optional embodiment, in the embodiment of the present application, the value range of the peripheral edge 201 of the tool head 20 is 8°-10°. The value range of the peripheral edge 201 of the tool head 20 is 8°-10°, which can reduce the wear of the profile milling cutter 100, improve the surface quality of the machining surface, adapt to different machining conditions, and avoid excessive decrease of the strength of the tool tip, while maintaining the sharpness and strength of the profile milling cutter 100; and can also avoid friction between the end edge surface and the workpiece, and improve the sharpness of the end edge.

[0035] As an optional embodiment, in the embodiment of the present application, the value range of the end edge 202 of the tool head 20 is 3°-5°. In this way, the sharpness of the profile milling cutter 100 can be maintained while maintaining the strength of the cutting edge 21, and the cutting force and heat can be controlled, the chip shape can be improved, the workpiece surface quality can be improved, and the machining of materials with higher hardness can be adapted.

[0036] As an optional embodiment, in the embodiment of the present application, the value range of the end edge 202 of the tool head 20 is 5°-8°. In this way, the wear of the relief surface can be reduced, thereby improving the durability and edge support of the profile milling cutter 100, and the vibration can be reduced, thereby improving the stability and surface quality of the machining.

[0037] As an optional embodiment, in the embodiment of the present application, a tool groove 22 is formed between two adjacent cutting edges 21, the tool groove 22 is a spiral groove, and the value range of the spiral angle α5 of the tool groove 22 is 38°-40°. The spiral angle α5 of 38°-40° can better balance the cutting force and reduce the deflection of the profile milling cutter 100; and the spiral angle α5 of 38°-40° can enhance the stability of the profile milling cutter 100, ensure smooth operation and minimize vibration, which is crucial for the service life and surface finish of the profile milling cutter 100; in addition, the spiral angle α5 of 38°-40° helps to reduce the cutting load, provides sufficient strength and durability of the profile milling cutter 100, especially when machining materials with higher hardness.

[0038] As an optional embodiment, in the embodiment of the present application, the length L of the arc-shaped bottom edge 211 along the axis O of the profile milling cutter 100 is 0.3mm-0.6mm. Preferably, the length L of the arc-shaped bottom edge 211 along the axis O of the tool head 20 is 0.45mm. In this way, it is helpful to reduce the contact area between the cutting edge 21 and the workpiece, thereby reducing friction and heat generation, which is conducive to improving the finish of the machined surface.

[0039] The above forming milling cutter 100, by designing the bottom edge as an arc structure, can increase the contact surface of the cutting edge with the workpiece, improve the cutting stress point and chip shape of the cutting edge, and further improve the performance and service life of the forming milling cutter 100; the radii of the first arc edge 211a and the second arc edge 212a are different, which can adapt to different cutting depths and cutting conditions, the first arc edge 211a with smaller radius can more flexibly adapt to the curvature change of the workpiece, while the second arc edge 212a with larger radius can help to perform more stable cutting in the relatively flat area, thereby improving the cutting efficiency and surface quality; by designing the cutting edge 21 as multiple, the feed per tooth and cutting resistance can be reduced, and the service life of the forming milling cutter 100 is further improved.

[0040] The embodiment of the present application also provides a machining equipment, which comprises a clamp and the above forming milling cutter 100, the clamp is used for clamping a workpiece, and the forming milling cutter 100 is used for milling the workpiece. The machining equipment can be a numerical control machine tool.

[0041] It is obvious for those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, and the present application can be implemented in other specific forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be regarded as exemplary and non-limiting, the scope of the present application is defined by the appended claims rather than the above description, and all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application.

[0042] Finally, it should be pointed out that the above embodiments are only used to illustrate the technical solutions of the present application and are not limiting, although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or replaced equivalently without departing from the spirit and scope of the technical solutions of the present application.

Claims

1. A profile milling cutter, characterized in that The tool shank and the tool head arranged at one end of the tool shank, the outer periphery side of the tool head is arranged with a plurality of cutting edges, each of the cutting edges comprises a peripheral edge, an end edge and an arc-shaped bottom edge, the arc-shaped bottom edge is arranged between the peripheral edge and the end edge, the arc-shaped bottom edge comprises a first arc edge and a second arc edge connected with each other, the first arc edge is close to the tool shank relative to the second arc edge, one end of the first arc edge away from the second arc edge is connected with the peripheral edge, one end of the second arc edge away from the first arc edge is connected with the end edge, the radius of the first arc edge is smaller than the radius of the second arc edge.

2. The profile milling cutter according to claim 1, characterized in that The tangent line of the arc-shaped bottom edge and the axis of the profile milling cutter form a plurality of division angles, and the plurality of division angles are not equal.

3. The profile milling cutter according to claim 1, wherein The core diameter of the tool head is in the range of 4.1mm-4.5mm, and the peripheral edge rake angle of the tool head is in the range of 5°-7°.

4. The profile milling cutter according to claim 1, wherein The radius of the first arc edge is in the range of 0.2mm-0.4mm, and the radius of the second arc edge is in the range of 4.5mm-6mm.

5. The profile milling cutter according to claim 1, wherein The peripheral edge one relief angle of the tool head is in the range of 8°-10°.

6. The profile milling cutter according to claim 1, wherein The end edge rake angle of the tool head is in the range of 3°-5°, and the end edge one relief angle of the tool head is in the range of 5°-8°.

7. The profile milling cutter according to claim 1, wherein The adjacent two cutting edges form a tool groove, the tool groove is a spiral groove, and the spiral angle of the tool groove is in the range of 38°-40°.

8. The profile milling cutter according to claim 1, wherein The length of the arc-shaped bottom edge along the axis direction of the tool head is in the range of 0.3mm-0.6mm.

9. The profile milling cutter according to claim 1, wherein The cutting edge is five, and the tangent line of the arc-shaped bottom edge of the five cutting edges and the axis of the profile milling cutter form division angles of 75°, 69°, 75°, 69° and 75° in sequence.

10. A processing apparatus characterized by comprising: The tool shank and the tool head arranged at one end of the tool shank, the outer periphery side of the tool head is arranged with a plurality of cutting edges, each of the cutting edges comprises a peripheral edge, an end edge and an arc-shaped bottom edge, the arc-shaped bottom edge is arranged between the peripheral edge and the end edge, the arc-shaped bottom edge comprises a first arc edge and a second arc edge connected with each other, the first arc edge is close to the tool shank relative to the second arc edge, one end of the first arc edge away from the second arc edge is connected with the peripheral edge, one end of the second arc edge away from the first arc edge is connected with the end edge, the radius of the first arc edge is smaller than the radius of the second arc edge.

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