Molding cutter

Abstract

The invention provides a forming cutter which comprises a cutter handle and a cutting part arranged at one end of the cutter handle, the cutting part comprises a first cutting edge and a second cutting edge which are oppositely arranged, and the first cutting edge and the second cutting edge are asymmetrically arranged relative to the axis of the cutter handle. The distance between the end, away from the axis of the cutter handle, of the first cutting edge and the axis of the cutter handle is larger than that between the end, away from the axis of the cutter handle, of the second cutting edge and the axis of the cutter handle, the first cutting edge is used for milling a workpiece when the forming cutter rotates, and the second cutting edge is used for scraping the workpiece when the forming cutter moves. According to the forming cutter, when the first cutting edge rotates for milling, the second cutting edge does not participate in cutting, so that the material of a machined workpiece is removed through single-edge milling to form a required contour shape, the contour error phenomenon caused by multi-edge errors is inhibited, and poor appearances such as vibration marks, cutter lines and male and female surfaces are avoided; the second cutting edge can correct the outline of the workpiece, and the machining quality of the workpiece is guaranteed.

Description

Technical Field

[0001] The present application relates to the technical field of metal cutting, and in particular to a forming tool. Background Art

[0002] At present, most metal casings are made of aluminum alloy and magnesium alloy. Combined with the anode surface technology, they can meet the appearance requirements of different customers. The anode technology is a surface treatment method that forms an oxide film on the metal surface through electrochemical oxidation. Its main function is to enhance the wear resistance, corrosion resistance and aesthetics of the metal surface.

[0003] When the milling process is used to process the appearance surface of a workpiece, due to the involvement of multiple blades of the forming tool in cutting, there will be slight deviations in the contour dimensions of the cutting edge of each blade, resulting in uneven cutting force, which will cause vibration marks, knife lines, yin-yang surfaces and other poor appearances on the workpiece, ultimately causing the workpiece to be scrapped after anodizing. Summary of the invention

[0004] In view of the above, it is necessary to provide a forming tool to improve the processing quality of the appearance surface of the workpiece.

[0005] In order to achieve the above-mentioned purpose, the present application discloses a forming tool, including a tool handle and a cutting part arranged at one end of the tool handle, the cutting part including at least one group of first cutting edges and second cutting edges arranged opposite to each other, the first cutting edges and the second cutting edges are arranged asymmetrically about the axis of the tool handle, the distance between one end of the first cutting edge away from the axis of the tool handle and the axis of the tool handle is greater than the distance between one end of the second cutting edge away from the axis of the tool handle and the axis of the tool handle, the first cutting edge is used to mill a workpiece when the forming tool rotates, and the second cutting edge is used to scrape the workpiece when the forming tool moves.

[0006] As an optional embodiment, in an embodiment of the present application, the cutting portion also includes at least one group of a first end edge and a second end edge, the first end edge and the second end edge are both arranged at an end of the cutting portion away from the tool handle and are respectively arranged corresponding to the first cutting edge and the second cutting edge, a segment tooth groove is formed between the first end edge and the second end edge, and the segment tooth groove is formed from the end of the cutting portion away from the tool handle toward the tool handle.

[0007] As an optional embodiment, in an embodiment of the present application, the cutting portion also includes at least one group of first circumferential teeth and second circumferential teeth, the first circumferential teeth and the second circumferential teeth are both arranged on the circumferential side of the cutting portion, the first circumferential teeth are arranged between the first end edge and the first cutting edge, and the second circumferential teeth are arranged between the second end edge and the second cutting edge.

[0008] As an optional implementation, in an embodiment of the present application, the rake angles of the first cutting edge, the first circumferential tooth and the first end edge are all in the range of -8° to -6°, and the rake angles of the second cutting edge, the second circumferential tooth and the second end edge are all 0°.

[0009] As an optional implementation, in an embodiment of the present application, the first back angles of the first cutting edge, the first circumferential tooth, the second cutting edge and the second circumferential tooth are all in the range of 7°~9°, and the first back angles of the first end edge and the second end edge are all in the range of 4°~6°.

[0010] As an optional embodiment, in the embodiments of the present application, the second back angles of the first cutting edge and the second cutting edge are both in the range of 21°~23°, the second back angles of the first end edge and the second end edge are both in the range of 11°~13°, the second back angles of the first circumferential tooth and the second circumferential tooth are both in the range of 20°~22°, and the second back angles of the first end edge and the second end edge are both in the range of 11°~13°.

[0011] As an optional implementation, in an embodiment of the present application, the third back angles of the first cutting edge, the first circumferential tooth, the second cutting edge and the second circumferential tooth are all in the range of 29° to 31°.

[0012] As an optional implementation, in an embodiment of the present application, the first cutting edge, the first circumferential tooth, the second cutting edge and the second circumferential tooth all include n sequentially arranged plane back angles, and the value of n is 5, 6 or 7. As an optional implementation, in an embodiment of the present application, a chamfer is formed on the second cutting edge.

[0013] As an optional implementation, in an embodiment of the present application, a chip groove is formed between the first cutting edge and the second cutting edge, and the chip groove is a straight groove and extends along the axial direction of the tool handle.

[0014] In the above-mentioned forming tool, the distance between the end of the first cutting edge away from the axis of the tool holder and the axis of the tool holder is greater than the distance between the end of the second cutting edge away from the axis of the tool holder and the axis of the tool holder, so that the second cutting edge does not participate in cutting when the first cutting edge is rotating and milling, thereby realizing single-edge milling to remove material of the workpiece to form a desired contour shape, and suppressing the contour error phenomenon caused by multiple cutting edge errors, avoiding the appearance of poor appearance such as vibration marks, knife lines, and yin-yang surfaces. After milling, the second cutting edge scrapes the workpiece when the forming tool moves, and can correct the contour of the workpiece, thereby ensuring the processing quality of the appearance surface of the workpiece. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 A schematic diagram of the three-dimensional structure of a forming tool proposed in an embodiment of the present application.

[0017] Figure 2 for Figure 1 Front view of the forming tool shown.

[0018] Figure 3 for Figure 1 A top view of the forming tool is shown.

[0019] Figure 4 for Figure 1 The shown schematic diagram is a partial enlargement of the forming tool at position IV.

[0020] Figure 5 for Figure 3 The enlarged schematic diagram of the forming tool at position V is shown.

[0021] Figure 6 for Figure 1 The schematic diagram of the cross-sectional structure of the forming tool along the VI-VI direction is shown. DETAILED DESCRIPTION

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

[0023] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the term "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or mutual communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] The disclosure below provides many different embodiments or examples to realize different structures of the present invention. In order to simplify the disclosure of the present invention, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present invention. In addition, the present invention can repeat reference numbers and / or reference letters in different examples, and this repetition is for the purpose of simplicity and clarity, which itself does not indicate the relationship between the various embodiments and / or settings discussed. In addition, the present invention provides various specific examples of processes and materials, but those of ordinary skill in the art can be aware of the application of other processes and / or the use of other materials.

[0025] The following is a detailed description of various embodiments of the present invention in conjunction with the accompanying drawings.

[0026] See also Figure 1 The embodiment of the present application provides a forming tool 100 , which includes a handle 10 and a cutting portion 20 disposed at one end of the handle 10 .

[0027] The handle 10 is cylindrical and has a central axis L. The handle 10 and the cutting part 20 are integrally formed, and a reinforcement part 30 is provided at the connection between the handle 10 and the cutting part 20 to increase the strength between the handle 10 and the cutting part 20, so as to prevent the cutting part 20 from being broken due to excessive force during operation. Furthermore, the inclination range of the reinforcement part 30 is 120° to 150°, and 135° is preferred in this embodiment.

[0028] The cutting portion 20 includes at least one group of first cutting edges 21 and second cutting edges 22 that are arranged opposite to each other. In this embodiment, it is preferred that the first cutting edges 21 and second cutting edges 22 are arranged in a group. It can be understood that in other embodiments, the first cutting edges 21 and second cutting edges 22 can be two groups or three groups, but are not limited thereto. The first cutting edges 21 and second cutting edges 22 are arranged asymmetrically about the axis L of the tool handle 10, that is, the first cutting edges 21 and second cutting edges 22 are arranged non-center-symmetrically, and the distance between the end of the first cutting edge 21 away from the axis L of the tool handle 10 and the axis L of the tool handle 10 is greater than the distance between the end of the second cutting edge 22 away from the axis L of the tool handle 10 and the axis L of the tool handle 10. The first cutting edge 21 is used for milling the workpiece when the forming tool 100 rotates, and the second cutting edge 22 is used for scraping the workpiece when the forming tool 100 moves.

[0029] In some embodiments, the cutting portion 20 also includes at least one group of first end edges 23 and second end edges 24. The first end edges 23 and the second end edges 24 are both arranged at the end of the cutting portion 20 away from the shank 10 and correspond to the first cutting edge 21 and the second cutting edge 22 respectively. A segmental tooth groove 25 is formed between the first end edge 23 and the second end edge 24. The segmental tooth groove 25 is formed from the end of the cutting portion 20 away from the shank 10 toward the shank 10.

[0030] By providing the first end cutting edge 23 , the first end cutting edge 23 can participate in milling the workpiece when the forming tool 100 rotates, and help form a specific contour or shape of the workpiece.

[0031] By setting the second end edge 24, the second end edge 24 can scrape the workpiece when the forming tool 100 moves, which helps to clean or refine the workpiece surface when the forming tool 100 moves in a straight line or curve, and helps to improve the smoothness and precision of the workpiece surface.

[0032] By setting the segment tooth groove 25, on the one hand, it can help to interrupt or control the length of the chips, prevent long chips from being entangled on the workpiece or the forming tool 100, thereby avoiding damage to the forming tool 100 or the workpiece surface; on the second hand, it helps to guide the chips to be discharged along the guide path, reduce the contact between the chips and the processed surface, and avoid scratching or damaging the workpiece; on the third hand, the segment tooth groove 25 can be used as a heat groove to help disperse the heat generated during the cutting process, reduce the temperature of the forming tool 100 and the workpiece, thereby improving the processing quality and the life of the forming tool 100; on the fourth hand, by reasonably designing the segment tooth groove 25, the cutting efficiency can be improved, the cutting force can be reduced, and the cutting process can be made smoother; on the fifth hand, the strength of the forming tool 100 can be enhanced, especially when the cutting force is large, which helps to improve the durability of the forming tool 100.

[0033] In some embodiments, the cutting portion 20 also includes at least one group of first circumferential teeth 26 and second circumferential teeth 27. The first circumferential teeth 26 and the second circumferential teeth 27 are both arranged on the circumferential side of the cutting portion 20. The first circumferential teeth 26 are arranged between the first end edge 23 and the first cutting edge 21, and the second circumferential teeth 27 are arranged between the second end edge 24 and the second cutting edge 22.

[0034] By setting the first circumferential teeth 26 and the second circumferential teeth 27, on the one hand, it helps to cut the workpiece more effectively when the forming tool 100 rotates or moves, thereby increasing the cutting efficiency by providing additional cutting edges; on the second hand, it may help to improve the discharge of chips, ensuring that chips do not accumulate in the cutting area, thereby avoiding overheating and damage to the workpiece; on the third hand, it helps to enhance the stability of the forming tool 100 during the cutting process, thereby reducing vibration by dispersing the cutting force; on the fourth hand, it helps to improve the accuracy of the machined surface by precisely controlling the cutting depth and cutting width; on the fifth hand, it can enable the forming tool 100 to adapt to different cutting conditions, such as different material hardnesses or different cutting depths.

[0035] In some embodiments, a chip groove 28 is formed between the first cutting edge 21 and the second cutting edge 22 . The chip groove 28 is a straight groove and extends along the axis L of the tool holder 10 .

[0036] By setting the chip groove 28 as a straight groove, on the first hand, the design of the straight groove chip groove 28 helps the chips to be discharged smoothly along the axis L of the tool holder 10, reduces the accumulation of chips in the cutting area, and avoids chip entanglement or obstruction of the cutting process; on the second hand, through the design of the chip groove 28, the length of the chips can be controlled, making them easier to break and discharge, thereby reducing the problems that may be caused by long chips, such as entanglement, scratching the workpiece surface or damaging the forming tool 100; on the third hand, the chip groove 28 helps to disperse the heat generated during the cutting process, reduce the thermal damage to the forming tool 100 and the workpiece, and also reduces the wear of the forming tool 100 and extends the life of the forming tool 100; on the fourth hand, a good chip removal effect can reduce interruptions in the cutting process, improve processing efficiency, and reduce workpiece surface quality problems caused by chip problems; on the fifth hand, the design of the straight groove chip groove 28 can adapt to different cutting conditions and material properties, and provide stable cutting performance.

[0037] Please also see Figure 2 The first cutting edge 21 , the first circumferential tooth 26 , the first end edge 23 , the second cutting edge 22 , the second circumferential tooth 27 and the second end edge 24 all have a rake surface 201 .

[0038] In some embodiments, the rake angle α0 of the first cutting edge 21, the first circumferential tooth 26 and the first end edge 23 is in the range of -8° to -6°, and the rake angle α1 (not shown) of the second cutting edge 22, the second circumferential tooth 27 and the second end edge 24 is 0°.

[0039] When the rake angle α0 of the first cutting edge 21, the first circumferential tooth 26 and the first end edge 23 meets the above range, the negative rake angle α0 can enhance the strength of the first cutting edge 21, making it more able to withstand the impact and pressure during the cutting process, especially when processing materials with high hardness or high strength. The negative rake angle α0 helps to improve the heat dissipation conditions of the forming tool 100, because the contact area between the first cutting edge 21 and the workpiece is large, which helps to quickly take away the heat and reduce the risk of overheating of the forming tool 100. The negative rake angle α0 helps to control the formation and discharge of chips, because the contact length between the first cutting edge 21 and the workpiece is short, which can promote the breakage of chips and reduce the entanglement and accumulation of long chips.

[0040] When the rake angle α1 of the second cutting edge 22, the second circumferential tooth 27 and the second end edge 24 is 0°, it means that the front cutting surface 201 of the second cutting edge 22, the second circumferential tooth 27 and the second end edge 24 is parallel to the base surface. This is usually used for finishing that requires good surface quality. The zero rake angle α1 helps to reduce the cutting force and make the cutting process smoother.

[0041] Preferably, the rake angle α0 of the first cutting edge 21 , the first circumferential tooth 26 , the first circumferential tooth 26 and the first end edge 23 is −7°.

[0042] The first cutting edge 21 , the first circumferential teeth 26 , the first end edge 23 , the second cutting edge 22 , the second circumferential teeth 27 and the second end edge 24 all have a first relief surface 202 .

[0043] Please also see Figures 3 to 6 In some embodiments, the first clearance angle α2 corresponding to the first clearance surface 202 of the first cutting edge 21, the first circumferential tooth 26, the second cutting edge 22 and the second circumferential tooth 27 is in the range of 7° to 9°, and the first clearance angle α3 corresponding to the first clearance surface 202 of the first end edge 23 and the second end edge 24 is in the range of 4° to 6°.

[0044] When each first back angle (α2, α3) satisfies the above range, on the first hand, it can reduce the friction between the back face of the forming tool 100 and the machined surface of the workpiece, thereby reducing wear and improving the quality of the machined surface; on the second hand, it helps to keep the cutting edge sharp and reduce friction during the cutting process, thereby improving the smoothness of the machined surface; on the third hand, it can improve the durability of the forming tool 100 to a certain extent because it reduces the contact length between the back face and the workpiece, thereby reducing wear; on the fourth hand, it helps to reduce the cutting force and the heat generated, thereby reducing thermal damage to the workpiece and the forming tool 100; on the fifth hand, under certain processing conditions, a smaller first (α2, α3) back angle helps to reduce or prevent vibration during the cutting process, thereby improving processing accuracy and surface quality; on the sixth hand, it helps to improve cutting efficiency because it can reduce resistance during the cutting process.

[0045] Preferably, the first clearance angles of the first cutting edge 21, the first peripheral tooth 26, the second cutting edge 22 and the second peripheral tooth 27 are all 8°, and the first clearance angles of the first end edge 23 and the second end edge 24 are all 5°.

[0046] In some embodiments, the width L1 of the first back cutting surface 202 of the first cutting edge 21 and the second cutting edge 22 is in the range of 0.4 mm to 0.6 mm, the width L2 of the first back cutting surface 202 of the first circumferential tooth 26 and the second circumferential tooth 27 is in the range of 0.9 mm to 1.1 mm, and the width L3 of the first back cutting surface 202 of the first end edge 23 and the second end edge 24 is in the range of 1.4 mm to 1.6 mm.

[0047] The width of the cutting edge directly affects the cutting load. A narrower cutting edge width can reduce the cutting load during each cut, thereby reducing the stress on the forming tool 100 and the machine tool. A wider cutting edge can provide a smoother cutting process and help achieve better surface quality. A wider first back tool face 202 can increase the durability of the forming tool 100 because it can better disperse the heat and stress generated during the cutting process. The appropriate cutting edge width helps to improve chip evacuation efficiency and prevent chip blockage. Precisely controlling the width of the cutting edge helps to improve machining accuracy, especially in precision machining applications. By adjusting the width of the cutting edge and the first back tool face 202, designers can customize the forming tool 100 according to specific machining requirements to optimize cutting performance.

[0048] Preferably, the width L1 of the first back cutting surface 202 of the first cutting edge 21 and the second cutting edge 22 is 0.5 mm, the width L2 of the first back cutting surface 202 of the first circumferential tooth 26 and the second circumferential tooth 27 is 1 mm, and the width L3 of the first back cutting surface 202 of the first end edge 23 and the second end edge 24 is 1.54 mm.

[0049] The first cutting edge 21 , the first circumferential teeth 26 , the first end edge 23 , the second cutting edge 22 , the second circumferential teeth 27 and the second end edge 24 all have a second relief surface 203 .

[0050] In some embodiments, the second back angle α4 corresponding to the second back cutting surface 203 of the first cutting edge 21 and the second cutting edge 22 is in the range of 21°~23°, the second back angle α5 corresponding to the second back cutting surface 203 of the first end edge 23 and the second end edge 24 is in the range of 11°~13°, and the second back angle α6 corresponding to the second back cutting surface 203 of the first circumferential tooth 26 and the second circumferential tooth 27 is in the range of 20°~22°.

[0051] When the second clearance angle α4 of the first cutting edge 21 and the second cutting edge 22 meets the above value range, such a larger second clearance angle α4 helps to reduce the friction between the second clearance face 203 of the forming tool 100 and the workpiece processing surface, reduces wear, improves the processing surface quality, and also helps to improve the durability of the forming tool 100. This design is suitable for situations where the cutting force is large or better surface quality is required.

[0052] When the second back angle α5 of the first end edge 23 and the second end edge 24 satisfies the above-mentioned value range, the relatively small second back angle α5 helps to improve the strength of the cutting edge and is suitable for processing conditions with high cutting hardness or requiring a large cutting depth. This design can improve the stability and durability of the forming tool 100 to a certain extent.

[0053] When the second clearance angle α6 of the first and second circumferential teeth 26 and 27 satisfies the above value range, the third clearance angle α6 design is between the above two, providing a balance point that can reduce friction while maintaining a certain cutting edge strength, and is suitable for a variety of cutting conditions.

[0054] Preferably, the second back angle α4 of the first cutting edge 21 and the second cutting edge 22 is 22°, the second back angle α5 of the first end edge 23 and the second end edge 24 is 12°, and the second back angle α6 of the first circumferential tooth 26 and the second circumferential tooth 27 is 21°.

[0055] In some embodiments, the width L4 of the second flank surface 203 of the first cutting edge 21 and the second cutting edge 22 ranges from 0.9 mm to 1.1 mm, and the width L5 of the second flank surface 203 of the first circumferential tooth 26 and the second circumferential tooth 27 ranges from 1.4 mm to 1.6 mm.

[0056] A smaller width of the second flank face 203 can reduce the contact area between the forming tool 100 and the workpiece, thereby reducing friction and wear and improving the durability of the forming tool 100. A smaller width of the second flank face 203 helps to reduce frictional heat during the cutting process, thereby reducing the thermal impact on the workpiece surface and improving the quality of the machined surface. A smaller width may increase the cutting force, but it may also improve the cutting accuracy and controllability. An appropriate width of the second flank face 203 helps to form and discharge chips, prevent chip blockage or entanglement, and improve cutting efficiency. A larger width of the second flank face 203 can increase the rigidity of the forming tool 100 and reduce vibration, especially when performing rough machining or machining materials with higher hardness.

[0057] Preferably, the width L4 of the second flank surface 203 of the first cutting edge 21 and the second cutting edge 22 is 1 mm, and the width L5 of the second flank surface 203 of the first circumferential tooth 26 and the second circumferential tooth 27 is 1.54 mm.

[0058] The first cutting edge 21 , the first circumferential teeth 26 , the second cutting edge 22 , and the second circumferential teeth 27 all have a third relief surface 204 .

[0059] In some embodiments, the third clearance angle α7 corresponding to the third clearance surface 204 of the first cutting edge 21, the first peripheral tooth 26, the second cutting edge 22 and the second peripheral tooth 27 is in the range of 29° to 31°.

[0060] When each third back angle α7 satisfies the above-mentioned value range, on the first aspect, a larger third back angle α7 helps to reduce the friction between the third back tool face 204 of the forming tool 100 and the machined surface of the workpiece, thereby reducing wear and improving the quality of the machined surface; on the second aspect, by reducing friction and frictional heat, thermal damage to the workpiece surface can be reduced, thereby obtaining a better surface finish; it helps to disperse heat, reduce the thermal wear of the forming tool 100, and thus extend the service life of the forming tool 100; on the third aspect, it can reduce the contact area between the forming tool 100 and the workpiece, thereby reducing the cutting force and making the cutting process smoother; on the fourth aspect, it helps to reduce the possibility of material adhesion to the forming tool 100, thereby reducing the tool sticking phenomenon; on the fifth aspect, it helps to improve cutting efficiency because it can reduce the friction between the forming tool 100 and the workpiece, making the cutting process easier.

[0061] Preferably, the third clearance angle α7 of the first cutting edge 21 , the first circumferential tooth 26 , the second cutting edge 22 and the second circumferential tooth 27 is 30°.

[0062] In some embodiments, the width L6 of the third relief surface 204 of the first cutting edge 21 , the second cutting edge 22 , the first circumferential tooth 26 , and the second circumferential tooth 27 is in the range of 0.9 mm to 1.1 mm.

[0063] By designing a suitable width L6 of the third flank face 204, the friction between the third flank face 204 of the forming tool 100 and the machined surface of the workpiece can be reduced, thereby reducing wear and improving the quality of the machined surface. A smaller width L6 of the third flank face 204 helps to reduce frictional heat during the cutting process, thereby reducing the thermal impact on the workpiece surface and improving the quality of the machined surface. The appropriate design of the width L6 of the third flank face 204 can reduce the wear of the forming tool 100 during the cutting process and improve the durability and reliability of the forming tool 100. The design of the width of the third flank face 204 helps to improve the heat dissipation conditions of the forming tool 100, reduce the thermal damage of the forming tool 100, and thus extend the service life of the forming tool 100. The design of the width L6 of the third flank face 204 can affect the distribution of the cutting force. A suitable design can reduce the cutting force and make the cutting process smoother. The design of the width L6 of the third flank face 204 can be adjusted according to factors such as the hardness of the processed material, the cutting speed and the feed rate to adapt to different processing conditions. The design of the width L6 of the third flank face 204 helps to form and discharge chips, prevent chip blockage or winding, and improve cutting efficiency. Appropriate design of the width L6 of the third relief surface 204 helps to reduce or prevent vibration during the cutting process, thereby improving machining accuracy and surface quality.

[0064] Preferably, the width L6 of the third relief surface 204 of the first cutting edge 21 , the second cutting edge 22 , the first circumferential tooth 26 and the second circumferential tooth 27 is 1 mm.

[0065] The first cutting edge 21 , the first peripheral tooth 26 , the second cutting edge 22 and the second peripheral tooth 27 each include n planar relief surfaces 205 .

[0066] In some embodiments, the first cutting edge 21, the first peripheral tooth 26, the second cutting edge 22 and the second peripheral tooth 27 all include n plane clearance angles α8 arranged in sequence, and the n plane clearance faces 205 correspond to the n plane clearance angles α8, and the value of n is 5, 6 or 7. The value range of the width L7 of each plane clearance face 205 is 2 mm to 3 mm. Preferably, the value of n is 6, and the value of the width L7 of the plane clearance face 205 is 2.4 mm.

[0067] In this way, multiple plane back angles α8 can form effective chip removal, which is conducive to the smooth discharge of chips, avoids chip blockage or entanglement in the cutting area, and thus improves cutting efficiency; the plane back angle α8 helps to disperse the heat generated by cutting, reduce the friction between the forming tool 100 and the workpiece, thereby reducing the wear of the forming tool 100 and extending the life of the forming tool 100; through the reasonably distributed plane back angle α8, the impact of the cutting force on the workpiece surface can be reduced, the surface roughness can be reduced, and the quality of the machined surface can be improved; the design of multiple plane back angles α8 can increase the rigidity of the forming tool 100, improve the stability of the forming tool 100 during the cutting process, and reduce vibration and deformation; under complex cutting conditions, such as different cutting depths, speeds and materials, multiple plane back angles α8 can provide more flexible cutting parameter selection to adapt to different processing requirements; a reasonable design of the plane back angle α8 can reduce the wear of the forming tool 100 during the cutting process and improve the durability and reliability of the forming tool 100; multiple plane back angles α8 help to balance the cutting force, reduce the impact and stress concentration on the forming tool 100, and thus improve the stability of the cutting process.

[0068] In some embodiments, please see Figure 4 A chamfer 29 is formed on the second cutting edge 22, and the angle α9 between the chamfer 29 and the cutting plane of the forming tool 100 ranges from -9° to -7°, and the width L8 of the chamfer 29 ranges from 0.03 mm to 0.05 mm.

[0069] In this way, the negative chamfer 29 angle α9 can enhance the strength of the cutting edge, making it more able to withstand the impact and pressure during the cutting process, especially when processing materials with high hardness or strength; the chamfer 29 can improve the heat dissipation conditions of the forming tool 100, because the contact area between the cutting edge and the workpiece is smaller, which helps to quickly take away the heat and reduce the risk of overheating of the forming tool 100; the negative chamfer 29 helps to control the formation and discharge of chips, because the contact length between the cutting edge and the workpiece is shorter, which can promote the breakage of chips and reduce the entanglement and accumulation of long chips; the negative chamfer 29 angle α9 may increase the cutting force, but at the same time it also improves the stability of the cutting edge, making the cutting process smoother; appropriate chamfer 29 design can reduce vibration during the cutting process, thereby improving processing accuracy and the surface quality of the workpiece; under certain specific processing conditions, such as high-speed cutting or precision cutting, the negative chamfer 29 angle can provide better performance.

[0070] Preferably, the angle α9 between the chamfer 29 and the cutting plane of the profile cutter 100 is -8°, and the width of the chamfer 29 is 0.04 mm.

[0071] The implementation process of the forming tool 100 of the embodiment of the present application is as follows: First, the main shaft rotates to drive the forming tool 100 to rotate, so that the first cutting edge 21 removes the material of the workpiece to form a contour; Then, the second cutting edge 22 forms a fixed normal angle with the processed part, and changes the orientation angle of the forming tool 100 following the path change of the workpiece feature. The second cutting edge 22 always keeps the same angle with the workpiece and forms a scraping motion. A negative angle chamfer 29 feature is added to the cutting edge. The chamfer 29 can achieve a contour finishing effect during cutting, making the scraped surface texture better and completely solving the undesirable phenomena such as vibration texture and knife line. Finally, the main shaft rotates to drive the forming tool 100 to rotate, so that the first end edge 23 and the second end edge 24 further process the appearance surface of the workpiece.

[0072] In the above-mentioned forming tool 100, by making the distance between the end of the first cutting edge 21 away from the axis L of the shank 10 and the axis L of the shank 10 greater than the distance between the end of the second cutting edge 22 away from the axis L of the shank 10 and the axis L of the shank 10, the second cutting edge 22 can be prevented from participating in cutting during rotary milling. Single-edge milling can remove material from the workpiece to form a desired contour shape, and suppress the contour error phenomenon caused by multiple cutting edge errors, avoiding the appearance of poor appearance such as vibration marks, knife lines, and yin-yang surfaces. After milling, the second cutting edge 22 scrapes the workpiece when the forming tool 100 moves, and can correct the contour of the workpiece, thereby ensuring the processing quality of the appearance surface of the workpiece.

[0073] It is obvious to those skilled in the art that the present application is not limited to the details of the exemplary embodiments described above, and that the present application can be implemented in other specific forms without departing from the spirit or essential features of the present application. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present application is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present application.

[0074] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present application and are not intended to limit it. Although the present application has been described in detail with reference to the preferred embodiments, a person of ordinary skill in the art should understand that the technical solution of the present application may be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the present application.

Claims

1. A forming tool, characterized in that: The tool comprises a tool holder and a cutting portion arranged at one end of the tool holder, wherein the cutting portion comprises at least one group of a first cutting edge and a second cutting edge arranged opposite to each other, wherein the first cutting edge and the second cutting edge are arranged asymmetrically with respect to the axis of the tool holder, wherein the distance between the end of the first cutting edge away from the axis of the tool holder and the axis of the tool holder is greater than the distance between the end of the second cutting edge away from the axis of the tool holder and the axis of the tool holder, wherein the first cutting edge is used for milling a workpiece when the forming tool rotates, and the second cutting edge is used for scraping a workpiece when the forming tool moves.

2. The forming tool according to claim 1, characterized in that The cutting portion also includes at least one group of first end edge and second end edge, the first end edge and the second end edge are both arranged at the end of the cutting portion away from the tool handle and are respectively arranged corresponding to the first cutting edge and the second cutting edge, a segment tooth groove is formed between the first end edge and the second end edge, and the segment tooth groove is formed from the end of the cutting portion away from the tool handle toward the tool handle.

3. The forming tool according to claim 2, characterized in that: The cutting portion also includes at least one group of first circumferential teeth and second circumferential teeth, wherein the first circumferential teeth and the second circumferential teeth are both arranged on the circumferential side of the cutting portion, the first circumferential teeth are arranged between the first end edge and the first cutting edge, and the second circumferential teeth are arranged between the second end edge and the second cutting edge.

4. The forming tool according to claim 3, characterized in that: The rake angles of the first cutting edge, the first circumferential tooth and the first end edge are all in the range of -8° to -6°, and the rake angles of the second cutting edge, the second circumferential tooth and the second end edge are all 0°.

5. The forming tool according to claim 3, characterized in that: The first clearance angles of the first cutting edge, the first peripheral tooth, the second cutting edge and the second peripheral tooth are all in the range of 7° to 9°, and the first clearance angles of the first end edge and the second end edge are all in the range of 4° to 6°.

6. The forming tool according to claim 5, characterized in that The second back angles of the first cutting edge and the second cutting edge are both in the range of 21°~23°, the second back angles of the first end edge and the second end edge are both in the range of 11°~13°, the second back angles of the first circumferential tooth and the second circumferential tooth are both in the range of 20°~22°, and the second back angles of the first end edge and the second end edge are both in the range of 11°~13°.

7. The forming tool according to claim 6, characterized in that The third clearance angles of the first cutting edge, the first peripheral tooth, the second cutting edge and the second peripheral tooth are all in the range of 29° to 31°.

8. The forming tool according to claim 7, characterized in that: The first cutting edge, the first circumferential tooth, the second cutting edge and the second circumferential tooth each include n plane back angles arranged in sequence, and the value of n is 5, 6 or 7.

9. The forming tool according to claim 1, characterized in that: A chamfer is formed on the second cutting edge.

10. The forming tool according to claim 1, characterized in that: A chip removal groove is formed between the first cutting edge and the second cutting edge. The chip removal groove is a straight groove and extends along the axial direction of the tool handle.

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