A new type of milling cutter blade centrifugal force clamping device

Abstract

The utility model relates to the field of blade installation, a new type milling cutter blade centrifugal force clamping equipment, including tool body, cutter groove, chip breaker, locating block, clamping block, blade second installation groove, bolt structure and accommodating cavity, for the setting of second installation groove and bolt structure in this application, can through the second installation groove of inclination setting relative to second abutting wall, make and the bolt structure in it can be away from or close to the clamping block in the process of moving up and down simultaneously, and then complete the assembly of clamping block through the upward movement of abutting piece abutting third tenon, and then complete the assembly of blade, also can complete the disassembly of clamping piece through the bolt head downward abutting third tenon, and then complete the disassembly of blade, stable structure, simple operation, and the dismounting efficiency is more efficient.

Description

Technical Field

[0001] This utility model relates to the field of blade installation, specifically a novel centrifugal clamping device for milling cutter blades. Background Technology

[0002] In the modern manufacturing field, modular milling cutters are highly favored due to their modular design. Their performance is inseparable from the insert clamping device. As an important component, the insert clamping device should ensure that the insert remains stable during high-speed milling, thereby guaranteeing machining quality and safety.

[0003] However, the radial positioning of the insert clamping device in the existing assembled milling cutter is not precise enough, which can easily affect the machining accuracy. Moreover, most of them use bolt positioning, which can easily loosen after long-term use and has poor reliability. Therefore, it is necessary to propose a new type of centrifugal force clamping device for milling cutter inserts. Utility Model Content

[0004] The purpose of this utility model is to provide a new type of centrifugal force clamping device for milling cutter inserts, which makes the milling cutter more stable and reliable in fixing and more accurate in positioning. Furthermore, the grinding of the cutting face of the insert does not affect the extension of the cutting edge of the insert, thereby solving the existing technical defects and unmet technical requirements.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a novel centrifugal force clamping device for milling cutter inserts; comprising:

[0006] The blade body has a mounting hole at its center;

[0007] A cutting groove is formed on the outer wall of the blade body. The cutting groove includes at least a first abutment wall, a second abutment wall, and a limiting wall. The limiting wall is parallel to the second abutment wall and connected to the first abutment wall, and is located below the first abutment wall. One end of the first abutment wall is connected to the outer wall of the blade body, and the other end extends perpendicularly into the cutting groove. One end of the second abutment wall is connected to the outer wall of the blade body, and the other end extends into the cutting groove in a direction away from the first abutment wall. The point where the second abutment wall is connected to the outer wall of the blade body is lower than the point where the first abutment wall is connected to the outer wall of the blade body. A first groove is provided on the first abutment wall.

[0008] It should be noted that the blade body in this application is generally circular, and the blade groove and the second mounting groove described below are located on the outer wall of the blade body. This outer wall can be understood as the surface containing the arc on the blade body, rather than the axial end face. Furthermore, the opening of the second mounting groove on the circular surface is located between the two axial end faces of the blade body. Additionally, it is stated that the junction of the second abutment wall and the outer wall of the blade body is lower than the junction of the first abutment wall and the outer wall of the blade body. This is specifically achieved by providing a chordally extending surface on the arc surface of one side of the second abutment wall, with the upper end of the second abutment surface connecting to this surface, thus achieving the effect described above.

[0009] A chip breaker is provided in a tool groove. The side wall of the chip breaker abuts against a first abutting wall, and a first protrusion is provided on this side wall. The first protrusion is provided in a first groove, and the first protrusion is slidably connected to the first groove. A first reference surface is provided at the bottom of the chip breaker.

[0010] The positioning block is disposed in the tool groove. A first mounting groove is provided on one side of the positioning block, and the other side extends obliquely from top to bottom toward the side where the first mounting groove is provided. A positioning surface as a side wall and a second reference surface as a bottom are provided in the first mounting groove. A second groove with only one opening is provided on the positioning surface. The second reference surface and the first reference surface are in close contact.

[0011] It should be further explained here that the positioning surface and the blade-mounting surface are parallel.

[0012] A clamping block is provided in the knife groove. The lower end of the clamping block is always provided between the second abutment wall and the limiting wall, and the two sides of the clamping block are slidably connected to the second abutment wall and the limiting wall respectively. The upper end of the clamping block slides against the inclined side of the positioning block.

[0013] It should be noted here that the clamping block can be understood as having at least three surfaces, namely the first surface, the second surface, and the third surface. The first and second surfaces are located on both sides of the clamping block, and the first and second surfaces are arranged parallel to each other. The second surface is located between the two surfaces and is located at the upper end of the clamping block. Based on the above connection relationship, it is easy to see that the third surface is also an inclined surface. Therefore, the connection relationship in this application can be understood as follows: the first surface slides against the second abutment wall, the second surface slides against the limiting wall, and the third surface abuts against the inclined surface on the positioning block. The inclined surface on the positioning block is located on the opposite side of the positioning block where the first mounting groove is set. The effect of the inclined setting is that the positioning block is wider at the top and narrower at the bottom.

[0014] The blade is disposed between the positioning block and the clamping block and can closely abut against both of them. Its upper end extends out of the blade groove. A second protrusion is provided on one side of the blade. The second protrusion can be disposed in the second groove and the two are adapted to be connected.

[0015] The second mounting groove is formed on the outer side wall of the blade body and communicates with the blade groove by forming an opening on the second abutment wall and the bottom of the blade groove. The extension direction of the second mounting groove is inclined relative to the second abutment wall, and a threaded hole is formed at the bottom of the second mounting groove.

[0016] A bolt structure includes a bolt head and a connecting rod. The upper end face of the bolt head has a screwing groove, and the lower end face of the bolt head is fixedly connected to the connecting rod. The outer side wall of the connecting rod is provided with an external thread and abutment. The external thread is located at the lower end of the connecting rod and can be connected to a threaded hole. The abutment is located between the external thread and the lower end face of the bolt head, and there is a gap between the abutment and the bolt head.

[0017] The receiving cavity is provided on the side of the clamping block that slides against the second abutment wall, and is used to provide operating space for the bolt structure. The inner wall of the receiving cavity is provided with a third tenon extending towards the second abutment wall. The third tenon has a through hole, and the connecting rod can be fitted into the through hole. The third tenon can extend into the gap space.

[0018] It should be further explained that the vertical width of the space is greater than the thickness of the third tenon. The third tenon is set on the cavity wall of the receiving cavity. The overall cross-section of the third tenon is semi-circular, which can cover the transverse cross-section of the receiving cavity. It should also be noted that the receiving cavity is opened on the first surface. Therefore, even if the third tenon extends, the end of the third tenon away from the cavity wall will not extend beyond the first surface, but will only be flush with the first surface. The through hole is opened on the upper end face of the third tenon, but the through hole is set at the position close to the third tenon and flush with the first surface. It is equivalent to the through hole also being opened on the end face of the third tenon that is flush with the first surface. That is, the through hole is only half open.

[0019] Additionally, it should be noted that the receiving cavity in this application is intended to provide operating space for the bolt structure. The design of the receiving cavity ensures that only the part of the bolt structure contacts the third tenon, while the other parts of the bolt structure do not contact the clamping block.

[0020] After installing the chip breaker, positioning block, and cutting tool into the tool slot, screw the bolt structure into the second mounting slot, and then install the clamping block into the tool slot, so that the third protrusion is located in the gap space. By rotating the bolt structure, move it away from the threaded hole, so that the upper end face of the abutment abuts against the lower end face of the third protrusion, causing the clamping part to move away from the bottom of the tool slot, thus clamping the cutting tool between the positioning block and the chip breaker. After use, move the bolt structure towards the threaded slot, so that the lower end face of the bolt head abuts against the upper end face of the third protrusion, causing the clamping block to move towards the bottom of the tool slot, and then completely disassemble.

[0021] The above description is merely a process description. Here, we further explain the working principle of this application. Because the second mounting is inclined and connected to the threaded hole by a thread, when the bolt structure is rotated by the tool used, it will move in the second mounting groove. When moving downward, the bolt structure gradually moves closer to the clamping block, while when moving upward, it gradually moves away from the clamping block. Therefore, the lateral distance between the bolt structure and the clamping block is changed by moving up and down. At the same time, the installation and removal of the clamping block are completed by moving and abutting against it. It should be noted that the third tenon is always within the gap space, which can be understood as the third tenon always abutting against the bolt structure.

[0022] It should be noted that the reference to the bottom and top of the groove or tenon in this application is based on the direction of the central axis of the groove or tenon, that is, the groove opening is the top, and the farthest surface of the tenon protruding from the plane on which it is set is the top. However, for relatively independent integral components such as chip breakers, cutting tools, positioning blocks and clamping blocks in the cutting groove, the reference for directions such as "up", "down" or "top" and "bottom" is based on the radial direction of the cutting tool body, that is, the part closer to the center of the cutting tool body is the bottom, and the part farther from the center of the cutting tool body is the top.

[0023] Preferably, the lower end of the first abutting wall is connected to the upper end face of the limiting ratio through an extension wall, a first surplus space is provided between the lower end of the clamping block and the bottom of the knife groove, and a second surplus space is provided between the positioning block and the extension wall.

[0024] Preferably, the blade has a symmetrical structure, and the central axis of the second tenon is located in the plane of symmetry of the blade. (Explanation)

[0025] Preferably, the chip breaker has a blade-adhering surface on the side away from the first tenon. The chip breaker fits tightly with the side of the blade away from the second tenon through the blade-adhering surface. The angle between the blade-adhering surface and the first reference surface is a positioning reference angle. The positioning reference angle is an acute angle and is equal to the wedge angle of the blade.

[0026] Preferably, a third spare space is provided between the end of the blade away from the part extending out of the cutting groove and the second reference surface.

[0027] Preferably, a grinding groove is formed on the surface of the blade that is in close contact with the blade surface, and the central axis of the cross-section of the grinding groove is perpendicular to the surface where its opening is located.

[0028] Preferably, a fourth surplus space is left between the top of the first tenon and the bottom of the first groove, and a fifth surplus space is left between the top of the second tenon and the bottom of the second groove.

[0029] Preferably, the angle between the extension direction of the second mounting groove and the second abutting wall is 10°.

[0030] Preferably, the surfaces of the clamping blocks are all roughened.

[0031] In this application, all surfaces with mating and abutting relationships are roughened. Specifically, the first abutting wall, the second abutting wall, the first surface, the second surface, the third surface, the second reference surface, the first reference surface, and the inclined surface on the positioning block (the surface that slides against the third surface) are all roughened. By roughening the key mating surfaces, the clamping block and positioning block are made more difficult to move axially after assembly, thus solving the problem of axial movement that may be detrimental to milling of various components before, during, and after milling.

[0032] Preferably, the top surface of the chip breaker is a concave arc surface, and the clamping block is made of tungsten alloy.

[0033] Compared with the prior art, the beneficial effects of this utility model are:

[0034] 1. The second mounting groove and bolt structure in this application allow the bolt structure located within the second mounting groove, which is inclined relative to the second abutment wall, to move up and down simultaneously away from or towards the clamping block. This allows the clamping block to be assembled by the abutment moving upward against the third protrusion, thereby assembling the blade. Alternatively, the clamping component can be disassembled by the bolt head abutting downward against the third protrusion, thereby disassembling the blade. The structure is stable, easy to operate, and more efficient in disassembly and assembly, preventing the blade from loosening during processing and improving the reliability of this application. Furthermore, the first groove, first protrusion, second groove, and second protrusion ensure more precise blade positioning and prevent significant processing errors.

[0035] 2. By setting the first surplus space, the second surplus space and the third surplus space, this application is able to adapt to blades of different thicknesses and lengths, thereby improving the adaptability of this application to blades of different specifications.

[0036] 3. The first and second reference surfaces are closely fitted, and the positioning reference angle is set to an acute angle equal to the blade wedge angle, so that the blade can maintain its extension amount after regrinding, and no complicated adjustment is required, which further improves the adaptability of this application. Attached Figure Description

[0037] Figure 1 This is a front view of the overall structure of this utility model;

[0038] Figure 2 This is a partially enlarged schematic diagram of point A in soil 1 of this utility model;

[0039] Figure 3 This is a partial front view of the structure of this utility model;

[0040] Figure 4 This is a front view of the blade body in this utility model;

[0041] Figure 5 In this utility model Figure 2 A magnified view of a portion of point B in the middle;

[0042] Figure 6 This is a partial structural diagram of the blade body in this utility model;

[0043] Figure 7 This is a schematic diagram of the overall structure of the bolt structure in this utility model;

[0044] Figure 8 This is a partial structural cross-sectional view of the bolt structure in this utility model;

[0045] Figure 9 This is a schematic diagram of the overall structure of the chip interrupter of this utility model;

[0046] Figure 10 This is a schematic diagram of the overall structure of the chip interrupter of this utility model from other angles;

[0047] Figure 11 This is a cross-sectional view of the chip interrupter of this utility model;

[0048] Figure 12 This is a schematic diagram of the overall structure of the blade in this utility model;

[0049] Figure 13 This is a schematic diagram of the overall structure of the blade in this utility model from other angles;

[0050] Figure 14 This is a cross-sectional view of the blade in this utility model;

[0051] Figure 15 This is a schematic diagram of the overall structure of the positioning block in this utility model;

[0052] Figure 16 This is a schematic diagram of the overall structure of the clamping block in this utility model;

[0053] Figure 17 This is a cross-sectional view of the overall structure of the clamping block in this utility model;

[0054] Figure 18 This represents the upper limit position that the bolt structure in this utility model can reach.

[0055] Figure 19 This represents the lower limit position that the bolt structure in this utility model can reach;

[0056] In the diagram: 1. Tool body; 2. Mounting hole; 3. Tool groove; 5. First abutment wall; 4. Second abutment wall; 6. First groove; 7. Chip breaker; 8. First tenon; 9. First reference surface; 10. Positioning block; 11. First mounting groove; 12. Positioning surface; 13. Second reference surface; 14. Second groove; 15. Clamping block; 16. Blade; 17. Second tenon; 18. First spare space; 19. Second spare space; 20. Tool-attaching surface; 21. Positioning reference angle; 22. Wedge angle; 23. Third spare space; 24. Grinding groove; 27. Second mounting groove; 28. Disassembly surface; 29. ​​Clamping cavity; 30. Positioning cavity; 31. Limiting wall; 32. Front blade face; 33. Rear blade face; 34. Threaded hole; 35. Bolt head; 36. Connecting rod; 37. Tightening groove; 38. External thread; 39. Abutment; 40. Spacer space; 41. Third tenon; 42. Extension wall; 43. Through hole; 44. First surface; 45. Second surface; 46. Third surface; 47. Receiving cavity. Detailed Implementation

[0057] The following will refer to the appendix in the embodiments of this utility model. Figure 1-7 The technical solutions in the embodiments of this utility model are clearly and completely described herein. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0058] In the description of this utility model, it should be understood that 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 with "first" and "second" may explicitly or implicitly include one or more of that feature.

[0059] Please see Figure 1-7 Embodiments of this utility model:

[0060] Example:

[0061] like Figure 1-19As shown: A centrifugal clamping device for a milling cutter insert 16, comprising:

[0062] The blade body 1 has a mounting hole 2 at its center;

[0063] The cutting groove 3 is formed on the outer wall of the blade body 1. The cutting groove 3 includes at least a first abutting wall 5, a second abutting wall 4, and a limiting wall 31. The limiting wall 31 is parallel to the second abutting wall 4 and is connected to the first abutting wall 5 and located below the first abutting wall 5. One end of the first abutting wall 5 is connected to the outer wall of the blade body 1, and the other end extends perpendicularly to the outer wall of the blade body 1 into the cutting groove 3. One end of the second abutting wall 4 is connected to the outer wall of the blade body 1, and the other end extends into the cutting groove 3 in a direction away from the first abutting wall 5. The point where the second abutting wall 4 is connected to the outer wall of the blade body 1 is lower than the point where the first abutting wall 5 is connected to the outer wall of the blade body 1. A first groove 6 is provided on the first abutting wall 5.

[0064] The chip breaker 7 is disposed in the tool groove 3. The side wall of the chip breaker 7 abuts against the first abutting wall 5, and a first protruding tenon 8 is provided on this side wall. The first protruding tenon 8 is disposed in the first groove 6, and the first protruding tenon 8 is slidably connected to the first groove 6. A first reference surface 9 is provided at the bottom of the chip breaker 7.

[0065] The positioning block 10 is disposed in the knife groove 3. A first mounting groove 11 is provided on one side of the positioning block 10, and the other side extends obliquely from top to bottom toward the side where the first mounting groove 11 is provided. A positioning surface 12 as a side wall and a second reference surface 13 as a bottom are provided in the first mounting groove 11. A second groove 14 with only one slot is provided on the positioning surface 12. The second reference surface 13 abuts tightly against the first reference surface 9.

[0066] The clamping block 15 is disposed in the knife groove 3. The lower end of the clamping block 15 is always disposed between the second abutment wall 4 and the limiting wall 31. The two sides of the clamping block 15 are slidably connected to the second abutment wall 4 and the limiting wall 31 respectively. The upper end of the clamping block 15 slides against the side of the positioning block 10 that extends obliquely away from the side where the first mounting groove 11 is provided.

[0067] Blade 16 is disposed between positioning block 10 and clamping block 15 and can closely abut against both of them. Its upper end extends out of the blade groove 3. A second tenon 17 is provided on one side of the blade 16. The second tenon 17 can be disposed in the second groove 14 and the two can be adapted to connect.

[0068] The second mounting groove 27 is formed on the outer side wall of the blade body 1 and communicates with the blade groove 3 by forming an opening on the bottom of the second abutment wall 4 and the blade groove 3. The extension direction of the second mounting groove 27 is inclined relative to the second abutment wall 4, and a threaded hole 34 is formed at the bottom of the second mounting groove 27.

[0069] The bolt structure includes a bolt head 35 and a connecting rod 36. The upper end face of the bolt head 35 is provided with a screwing groove 37, and the lower end face of the bolt head 35 is fixedly connected to the connecting rod 36. The outer side wall of the connecting rod 36 is provided with an external thread 38 and abutment 39. The external thread 38 is located at the lower end of the connecting rod 36 and can be connected to a threaded hole 34. The abutment 39 is located between the external thread 38 and the lower end face of the bolt head 35, and a gap space 40 is provided between the abutment 39 and the bolt head 35.

[0070] The receiving cavity 47 is provided on the side of the clamping block 15 that slides against the second abutment wall 4, and is used to provide operating space for the bolt structure. The inner wall of the receiving cavity 47 is provided with a third tenon 41 extending towards the second abutment wall 4. The third tenon 41 is provided with a through hole 43, and the connecting rod 36 can be fitted into the through hole 43. The third tenon 41 can extend into the space 40.

[0071] It should be further explained that the width of the gap 40 in the vertical direction is greater than the thickness of the third tenon 41. The third tenon 41 is set on the cavity wall of the receiving cavity 47. The overall cross-section of the third tenon 41 is semi-circular, which can cover the transverse cross-section of the receiving cavity 47. It should be noted that the receiving cavity 47 is opened on the first surface. Therefore, even if the third tenon 41 extends, the end of the third tenon 41 away from the wall of the receiving cavity 47 will not extend beyond the first surface, but will only be flush with the first surface. The through hole 43 is opened on the upper end face of the third tenon 41. However, the through hole 43 is set with an opening at the position close to the third tenon 41 and flush with the first surface. It is equivalent to the through hole 43 also being opened on the end face of the third tenon 41 that is flush with the first surface. That is, the through hole 43 is only half.

[0072] After installing the chip breaker 7, positioning block 10, and blade 16 into the tool groove 3, screw the bolt structure into the second mounting groove 27, and then install the clamping block 15 into the tool groove 3, so that the third protrusion 41 is located in the space 40. By rotating the bolt structure, move it away from the threaded hole 34, and the upper end face of the abutment 39 abuts against the lower end face of the third protrusion 41, so that the clamping member moves away from the bottom of the tool groove 3, thereby clamping the blade 16 between the positioning block 10 and the chip breaker 7. After use, move the bolt structure towards the threaded groove, and the lower end face of the bolt head 35 abuts against the upper end face of the third protrusion 41, so that the clamping block 15 moves towards the bottom of the tool groove 3, and completely disassemble.

[0073] In this embodiment, specifically, the outer wall of the blade body 1 is arc-shaped. To ensure that the junction of the second abutment wall 4 and the outer wall of the blade body 1 is lower than the junction of the first abutment wall 5 and the outer wall of the blade body 1, a disassembly surface 28 is cut along the outer wall of the blade body 1 above the second abutment wall 4, moving towards the center of the blade body 1. This allows one end of the disassembly surface 28 away from the center of the blade body 1 to connect with the outer wall of the blade body 1, and the other end closer to the center of the blade body 1 to connect with the second abutment surface. Therefore, in this embodiment, the statement "the junction of the second abutment wall 4 and the outer wall of the blade body 1 is lower than the junction of the first abutment wall 5 and the outer wall of the blade body 1" is transformed into "the junction of the disassembly surface 28 and the second abutment surface is lower than the outer wall of the blade body 1." The junction of the side wall and the first abutment surface”, and the cross-section of the clamping block 15 is a pentagon with two adjacent right angles, and the knife groove 3 is divided into a clamping cavity 29 and a positioning cavity 30. The clamping cavity 29 and the positioning cavity 30 are interconnected. The positioning cavity 30 has the first abutment wall 5 as its side wall, and the clamping cavity 29 has the second abutment wall 4 as its inner side wall and is inclined on one side of the positioning cavity 30. The bottom of the clamping cavity 29 is the bottom of the knife groove 3. The clamping cavity 29 is also provided with a limiting wall 31 parallel to the second abutment wall 4 for sliding limiting of the clamping block 15. The upper end of the limiting wall 31 is connected to the bottom surface of the positioning cavity 30, that is, the bottom of the clamping cavity 29 is obliquely below the bottom of the positioning cavity 30.

[0074] This application achieves stable clamping of the cutting tool 16 by tightly abutting the clamping block 15, positioning block 10, and chip breaker 7 within the cutting tool groove 3 against the inner sidewall of the cutting tool groove 3. The fitting arrangement of the second tenon 17 and the second groove 14 further achieves precise positioning of the cutting tool 16, avoiding the impact of milling cutter issues on machining accuracy. This application has high stability, high machining accuracy, and ensures machining safety.

[0075] like Figure 3As shown: the lower end of the first abutting wall 5 is connected to the upper end face of the limiting wall through the extension wall 42, a first surplus space 18 is provided between the lower end of the clamping block 15 and the bottom of the knife groove 3, and a second surplus space 19 is provided between the positioning block 10 and the extension wall 42.

[0076] In this embodiment, it is important to emphasize that the second surplus space 19 includes surplus space between the bottom of the positioning block 10 and the bottom of the positioning cavity 30, and also surplus space between the positioning block 10 and the side wall of the positioning cavity 30. Therefore, the arrangement of the first surplus space 18 and the second surplus space 19 can respectively increase the movable range of the clamping block 15 and the positioning block 10 in the blade groove 3 to accommodate blades 16 of different thicknesses, thereby improving the adaptability of this embodiment. Furthermore, as mentioned above, the first reference surface 9 and the second reference surface 13 are in close contact. This arrangement also ensures that even if blades 16 of different sizes are replaced, the structure of this embodiment can still guarantee the precise fit between the positioning block 10 and the blade 16.

[0077] like Figure 12-14 As shown: The blade 16 has a symmetrical structure, and the central axis of the second tenon 17 is located in the symmetrical plane of the blade 16.

[0078] In this embodiment, the symmetrical structure of the blade 16 is designed to improve its utilization rate. Both ends of the tool have cutting edges. After the cutting edge on the upper end of the blade 16 is used, the blade 16 can be reversed before re-sharpening, eliminating the need to replace it with a new blade 16. Secondly, the second groove 14 is perpendicular to the surface of the blade 16, which helps maintain a balanced clamping force on the blade 16. As mentioned above, the second groove 14 has an opening, so the distances from both ends of the second groove 14 (here, "end" refers to the axial direction of the blade body 1) to the two end faces of the positioning block 10 are equal. This helps to better position the blade 16 along the axial direction of the blade body 1, increasing stability. Furthermore, the second groove 14 has a central axis, meaning it is a symmetrical groove. This symmetrical design ensures that after the blade 16 is reversed to replace the cutting edge, the assembly between the blade 16 and the positioning block 10 remains unchanged, guaranteeing its fault tolerance.

[0079] like Figure 2 , 3 As shown in Figures 9, 10, and 11: A blade-fitting surface 20 is provided on the side of the chip breaker 7 away from the first tenon 8. The chip breaker 7 is tightly fitted to the side of the blade 16 away from the second tenon 17 through the blade-fitting surface 20. The included angle between the blade-fitting surface 20 and the first reference surface 9 is the positioning reference angle 21. The positioning reference angle 21 is an acute angle and is equal to the wedge angle 22 of the blade 16.

[0080] This design ensures that even after the blade 16 is re-sharpened, the amount of blade 16 extending out of the groove 3 remains unchanged, thus improving the adaptability of this embodiment. The specific explanation is as follows: The wedge angle 22 of the blade 16 is equal to the positioning reference angle 21, and the angle size is represented by b. The thickness removed after the blade 16 is regrinded (by grinding the end face where the cutting edge is located on the blade 16, which is the surface that abuts against the tool-fitting surface 20) is represented by h. In order to keep the cutting edge extension of the blade 16 unchanged after regrinding, the main cutting edge (i.e., the upper cutting edge) of the blade 16 needs to be moved to the position of the main cutting edge of the blade 16 before regrinding. That is, the main cutting edge of the blade 16 needs to move a distance h / sinb along the back face 33 of the blade 16. When the front face 32 of the blade 16 is in contact with the tool-fitting surface 20, the back face 33 of the blade 16 is parallel to the first sharp turning surface and the second reference surface 13. Then, the positioning block 10 moves a distance h / sinb along the first reference surface 9, which drives the blade 16, i.e., the main cutting edge on the blade 16, to move a distance h / sinb along the back face of the blade 16. Therefore, the extension of the main cutting edge of the blade 16 remains unchanged after regrinding.

[0081] like Figure 2-3 As shown: A third spare space 23 is provided between the end of the blade 16 away from the part extending out of the blade groove 3 and the second reference surface 13.

[0082] Specifically, the third surplus space 23 can accommodate blades 16 of different lengths, where length refers to the distance between the cutting edges at both ends of the blade 16. This further improves the adaptability of this embodiment.

[0083] like Figure 12-14 As shown: A grinding groove 24 is provided on the surface of the blade 16 that is in close contact with the blade surface 20, and the central axis of the cross-section of the grinding groove 24 is perpendicular to the surface where its opening is located.

[0084] Specifically, the two ends of the regrinding groove 24 are in contact with the two ends of the blade 16 and the cutting face (the "end" in this section refers to the axial direction of the blade 16). That is, the two ends of the regrinding groove 24 extend all the way to the end face of the blade. This reduces the amount of machining required during regrinding, improves regrinding efficiency, and saves on the manufacturing cost of the blade 16. When the regrinding groove 24 completely disappears due to regrinding, it means that the blade 16 has reached its maximum regrinding depth, thus reminding the user that the blade 16 cannot be further regrinded. Specifically, the depth of the regrinding groove 24 is set to 0.9mm, and the amount of regrinding the blade 16 each time is 0.3mm. This means that each blade 16 cannot be regrinded after three regrindings. This serves as a reminder to the user that substandard blades 16 cannot be used, ensuring cutting performance and meeting cutting requirements. It also improves safety by preventing the blade 16 from breaking. The regrinding groove 24 is perpendicular to the end face, does not change the symmetrical structure of the blade 16, and ensures balanced force on the blade 16.

[0085] like Figure 2 As shown: there is a fourth surplus space between the top of the first tenon 8 and the bottom of the first groove 6, and a fifth surplus space between the top of the second tenon 17 and the bottom of the second groove 14.

[0086] Specifically, it should be emphasized that the fourth and fifth surplus spaces refer to the fact that when the first tenon 8 and the first groove 6 are assembled, as well as when the second tenon 17 and the second groove 14 are assembled, the remaining surfaces are completely fitted except for the surplus space left between the tenon and the bottom of the groove. In this way, a certain amount of machining error can be allowed during the machining of the first tenon 8 and the second tenon 17. At the same time, it should be emphasized again that the assembly of the first tenon 8 and the first groove 6, as well as the assembly of the second tenon 17 and the second groove 14, can improve the accuracy of the positioning of the blade 16, especially the radial positioning.

[0087] like Figure 3-6 As shown: the angle between the extension direction of the second mounting groove 27 and the second abutment wall 4 is 10°.

[0088] The surfaces of the clamping blocks 15 are all roughened.

[0089] like Figure 1 , 2 As shown in Figures 3, 9, 10 and 11: the top surface of the chip breaker 7 is set as a concave arc surface, and the clamping block 15 is made of tungsten alloy.

[0090] Specifically, this embodiment is configured in such a way that sawdust can be prevented from accumulating in front of the cutting teeth, thus eliminating the impact of chips on milling quality and ensuring machining accuracy.

[0091] The clamping block 15 is made of tungsten alloy.

[0092] Specifically, the cutter body 1, chip breaker 7, and positioning block 10 are all made of 45 steel. The cutting tool 16 is made of high-strength, high-hardness, and high-heat-resistant cemented carbide material, which reduces manufacturing costs and improves the machining quality of milling. The clamping block 15 is made of tungsten alloy, which can increase the centrifugal force of the clamping block 15 during high-speed milling, thereby increasing the clamping degree of the cutting tool 16.

[0093] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It will be apparent to those skilled in the art that this utility model is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0094] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A novel centrifugal clamping device for milling cutter inserts, characterized in that, include: The blade body (1) has a mounting hole (2) at its center; The cutting groove (3) is formed on the outer wall of the blade body (1). The cutting groove (3) includes at least a first abutting wall (5), a second abutting wall (4) and a limiting wall (31). The limiting wall (31) is parallel to the second abutting wall (4). The limiting wall (31) is connected to the first abutting wall (5) and is located below the first abutting wall (5). One end of the first abutting wall (5) is connected to the outer wall of the blade body (1), and the other end extends perpendicularly to the outer wall of the blade body (1) into the cutting groove (3). One end of the second abutting wall (4) is connected to the outer wall of the blade body (1), and the other end extends into the cutting groove (3) in a direction away from the first abutting wall (5). The connection between the second abutting wall (4) and the outer wall of the blade body (1) is lower than the connection between the first abutting wall (5) and the outer wall of the blade body (1). A first groove (6) is provided on the first abutting wall (5). A chip breaker (7) is provided in the tool groove (3). The side wall of the chip breaker (7) abuts against the first abutting wall (5), and a first protruding tenon (8) is provided on this side wall. The first protruding tenon (8) is provided in the first groove (6), and the first protruding tenon (8) is slidably connected to the first groove (6). A first reference surface (9) is provided at the bottom of the chip breaker (7). Positioning block (10), the positioning block (10) is disposed in the knife groove (3), a first mounting groove (11) is provided on one side of the positioning block (10), and the other side extends obliquely from top to bottom towards the side where the first mounting groove (11) is provided. The first mounting groove (11) is provided with a positioning surface (12) as a side wall and a second reference surface (13) as a bottom. The positioning surface (12) is provided with a second groove (14) with only one slot. The second reference surface (13) is in close contact with the first reference surface (9). A clamping block (15) is disposed in the knife groove (3). The lower end of the clamping block (15) is always disposed between the second abutment wall (4) and the limiting wall (31), and the two sides of the clamping block (15) are slidably connected to the second abutment wall (4) and the limiting wall (31) respectively. The upper end of the clamping block (15) slides against the side of the positioning block (10) that extends obliquely. The side away from the first mounting groove (11) is also abutted. Blade (16), the blade (16) is disposed between the positioning block (10) and the clamping block (15) and can closely abut against the two, its upper end extends out of the blade groove (3), and a second protruding tenon (17) is provided on one side of the blade (16), the second protruding tenon (17) can be disposed in the second groove (14) and the two are adapted to connect. The second mounting groove (27) is opened on the outer side wall of the blade body (1) and communicates with the blade groove (3) by forming an opening on the bottom of the second abutment wall (4) and the blade groove (3). The extension direction of the second mounting groove (27) is inclined relative to the second abutment wall (4), and a threaded hole (34) is opened at the bottom of the second mounting groove (27). The bolt structure includes a bolt head (35) and a connecting rod (36). The upper end face of the bolt head (35) is provided with a screwing groove (37), and the lower end face is fixedly connected to the connecting rod (36). The outer side wall of the connecting rod (36) is provided with an external thread (38) and abutment (39). The external thread (38) is located at the lower end of the connecting rod (36) and can be connected to the threaded hole (34). The abutment (39) is located between the external thread (38) and the lower end face of the bolt head (35), and a gap space (40) is provided between the abutment (39) and the bolt head (35). The receiving cavity (47) is provided on the side of the clamping block (15) that slides against the second abutment wall (4) to provide operating space for the bolt structure. The inner wall of the receiving cavity (47) is provided with a third tenon (41) extending toward the second abutment wall (4). The third tenon (41) is provided with a through hole (43). The connecting rod (36) can be fitted into the through hole (43). The third tenon (41) can be inserted into the space (40). After installing the chip breaker (7), positioning block (10), and blade (16) in the tool groove (3), screw the bolt structure into the second mounting groove (27), and then install the clamping block (15) in the tool groove (3), so that the third protrusion (41) is located in the space (40). By rotating the bolt structure, move it away from the threaded hole (34), and the upper end face of the abutment (39) abuts against the lower end face of the third protrusion (41), so that the clamping part moves away from the bottom of the tool groove (3), thereby clamping the blade (16) between the positioning block (10) and the chip breaker (7). After use, move the bolt structure towards the threaded groove, and the lower end face of the bolt head (35) abuts against the upper end face of the third protrusion (41), so that the clamping block (15) moves towards the bottom of the tool groove (3), and complete disassembly.

2. The novel centrifugal clamping device for milling cutter inserts according to claim 1, characterized in that, The lower end of the first abutting wall (5) is connected to the upper end face of the limiting ratio through the extension wall (42). A first surplus space (18) is provided between the lower end of the clamping block (15) and the bottom of the knife groove (3). A second surplus space (19) is provided between the positioning block (10) and the extension wall (42).

3. The novel centrifugal clamping device for milling cutter inserts according to claim 1, characterized in that, The blade (16) has a symmetrical structure, and the central axis of the second tenon (17) is located in the symmetrical plane of the blade (16).

4. The novel centrifugal clamping device for milling cutter inserts according to claim 1, characterized in that, The chip breaker (7) has a blade-adhering surface (20) on the side away from the first tenon (8). The chip breaker (7) is tightly fitted to the side of the blade (16) away from the second tenon (17) through the blade-adhering surface (20). The included angle between the blade-adhering surface (20) and the first reference surface (9) is the positioning reference angle (21). The positioning reference angle (21) is an acute angle and is equal to the wedge angle (22) of the blade (16).

5. A novel centrifugal clamping device for milling cutter inserts according to claim 1, characterized in that, A third spare space (23) is provided between the end of the blade (16) away from the part extending out of the blade groove (3) and the second reference surface (13).

6. The novel centrifugal clamping device for milling cutter inserts according to claim 1, characterized in that, A grinding groove (24) is provided on the surface of the blade (16) that is in close contact with the blade surface (20), and the central axis of the cross-section of the grinding groove (24) is perpendicular to the surface where its opening is located.

7. A novel centrifugal clamping device for milling cutter inserts according to claim 1, characterized in that, A fourth surplus space is left between the top of the first tenon (8) and the bottom of the first groove (6), and a fifth surplus space is left between the top of the second tenon (17) and the bottom of the second groove (14).

8. The novel centrifugal clamping device for milling cutter inserts according to claim 1, characterized in that, The angle between the extension direction of the second mounting groove (27) and the second abutment wall (4) is 10°.

9. A novel centrifugal clamping device for milling cutter inserts according to claim 1, characterized in that, The surfaces of the clamping blocks (15) are all roughened.

10. A novel centrifugal clamping device for milling cutter inserts according to claim 1, characterized in that, The top surface of the chip breaker (7) is set as a concave arc surface, and the clamping block (15) is made of tungsten alloy.

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