Milling cutter for processing hole site of sealing ring

Abstract

The utility model provides a milling cutter for processing a hole site of a sealing ring, which comprises a cutter bar and a cutter head which is arranged on the cutter bar and is coaxial with the cutter bar, the cutter head is provided with a plurality of cutter teeth which are arranged along the circumferential direction of the cutter bar at intervals, each cutter tooth is used for milling the hole site of the sealing ring, and a chip groove for discharging cutting chips is arranged between every two adjacent cutter teeth. The top of each cutter tooth is provided with a V-shaped cutting edge facing the rotating direction of the cutter bar, and each cutter tooth mills a sealing ring hole position through the corresponding cutting edge. According to the milling cutter for machining the hole site of the sealing ring, the sealing ring can be stably placed, so that the sealing performance of equipment is favorably improved.

Description

Technical Field

[0001] This utility model relates to the field of milling cutter technology, and in particular to a milling cutter for machining sealing ring holes. Background Technology

[0002] With the development of industrial technology, the requirements for equipment sealing performance are getting higher and higher. Many devices need to control the flow of fluid by setting valves. In the valve design process, sealing rings are often installed at the interface to ensure good sealing performance of the connection between the two valves and prevent liquid leakage at the connection between the two valves. To install sealing rings on valves, sealing ring holes need to be machined at the corresponding positions on the valve.

[0003] Currently, the sealing ring holes machined using existing milling cutters are difficult to keep the sealing ring stable, which can easily lead to slight displacement of the sealing ring within the groove, resulting in sealing gaps and affecting the sealing performance of the equipment. Utility Model Content

[0004] In view of this, the present invention aims to provide a milling cutter for machining the sealing ring hole to improve the sealing performance of the equipment.

[0005] To achieve the above objectives, the technical solution of this utility model is implemented as follows:

[0006] A milling cutter for machining sealing ring holes includes a cutter shank and a cutter head coaxially disposed on the cutter shank. The cutter head has a plurality of cutting teeth arranged at circumferential intervals along the cutter shank. Each cutting tooth is used to mill the sealing ring hole. A chip removal groove for chip discharge is provided between each pair of adjacent cutting teeth. The top of each cutting tooth has a V-shaped cutting edge facing the rotation direction of the cutter shank. Each cutting tooth mills the sealing ring hole through the corresponding cutting edge.

[0007] Furthermore, each of the cutting edges includes a main cutting edge, an inner wall cutting edge for machining the inner wall of the sealing ring hole, and an outer wall cutting edge for machining the outer wall of the sealing ring hole. The main cutting edge has a rounded corner structure, and the ends of the inner wall cutting edge and the outer wall cutting edge are respectively connected to the two ends of the main cutting edge.

[0008] Furthermore, the radius R of the fillet of the main cutting edge is between 1.492 mm and 1.508 mm; and / or, the included angle α between the outer wall cutting edge and the inner wall cutting edge is between 41.5° and 42.5°.

[0009] Furthermore, each of the cutting teeth has an end milling edge on its inner side that is connected to the corresponding inner wall cutting edge. The end milling edge is used to mill the workpiece surface to ensure that the workpiece surface is flat.

[0010] Furthermore, each of the chip removal grooves extends along the axial direction of the tool holder and gradually extends outward along the central axis of the tool holder; each of the chip removal grooves includes a first sidewall and a second sidewall extending radially along the tool holder, wherein the side of the first sidewall opposite to the outer edge of one of the cutting teeth is connected to the side of the second sidewall opposite to the outer edge of the other cutting tooth.

[0011] Furthermore, each of the second sidewalls is a concave arc surface.

[0012] Furthermore, the rake angle of each of the outer wall cutting edges is 23°; and / or, the first clearance angle of each of the outer wall cutting edges is 12°, and the second clearance angle of each of the outer wall cutting edges is 27°.

[0013] Furthermore, the first clearance angle of each inner wall cutting edge is 1°, and the second clearance angle of each inner wall cutting edge is 12°.

[0014] Furthermore, the tool holder, the tool head, each of the tool teeth, and each of the cutting edges are an integral structure.

[0015] Compared with the prior art, this utility model has the following advantages:

[0016] The milling cutter for machining sealing ring holes described in this utility model has multiple cutting teeth on the cutter head. By setting a V-shaped cutting edge on the top of the cutting teeth, the sealing ring can be well fixed and locked after machining the sealing ring hole, ensuring the stability of the sealing ring, thereby avoiding the generation of sealing gaps and improving the sealing performance of the equipment.

[0017] Secondly, the cutting edge consists of a main cutting edge, an outer wall cutting edge, and an inner wall cutting edge. During cutting, it is only necessary to move the machining center point of the milling cutter and the origin of the sealing ring hole to the same vertical line for vertical cutting, so as to complete the one-time machining of the sealing ring hole, which greatly improves the machining efficiency of the sealing ring hole. At the same time, setting the main cutting edge to a rounded corner structure can make the cutting edge smoother when cutting into the workpiece, which can reduce the impact between the cutting edge and the workpiece, reduce the sudden change of cutting force, and thus improve the stability of the cutting process.

[0018] Setting the radius R of the fillet on the main cutting edge between 1.492mm and 1.508mm allows it to withstand greater cutting forces during the cutting process without easily becoming damaged. It also increases the contact area between the cutting edge and the workpiece, preventing stress concentration at a single point on the cutting edge and thus reducing wear. Furthermore, setting the angle α between the outer and inner cutting edges between 41.5° and 42.5° ensures precise dimensions of the sealing ring hole, guaranteeing a suitable fit between the sealing ring and the hole wall, preventing loosening of the sealing ring, and improving sealing performance.

[0019] Furthermore, by setting an end milling edge, the workpiece surface can be milled when machining the sealing ring hole, ensuring a smooth workpiece surface. Simultaneously, it ensures that the height between the workpiece surface and the bottom of the sealing ring hole remains consistent, facilitating workpiece installation. Extending the chip removal groove along the axial direction of the tool holder and outwards along its central axis allows for timely removal of cutting chips, preventing blockage. The chip removal groove, composed of a first sidewall and a second sidewall, forms a clear guiding channel. During cutting, the first and second sidewalls restrict the movement direction of the cutting chips, ensuring they are smoothly discharged along a predetermined path, preventing random scattering or accumulation of chips within the machining area.

[0020] Setting the second sidewall as a concave arc surface allows the cutting chips to be smoothly discharged along the curve of the arc surface, reducing the phenomenon of cutting chips getting stuck and accumulating. At the same time, it can also prevent cutting chips from splashing in all directions, reducing the impact of cutting chips on the equipment.

[0021] Furthermore, limiting the rake angle of the outer wall cutting edge can reduce the impact of cutting force and heat on the workpiece, decrease workpiece deformation during machining, and ensure more stable cutting by the milling edge, reducing cutting vibration and thus improving machining accuracy. Limiting the first and second clearance angles of the outer wall cutting edge, by selecting appropriate angles, helps reduce friction between the cutting edge and the workpiece, thereby increasing cutting speed and efficiency. Simultaneously, when encountering hard points in the material during milling, it ensures the cutting edge has sufficient strength to resist these external forces, preventing chipping.

[0022] Limiting the first and second clearance angles of the inner wall cutting edge balances the components of the cutting force in different directions, thereby reducing tool deflection caused by unbalanced cutting forces and improving machining accuracy. Integrating the tool holder, tool head, cutting teeth, and cutting edge into a single structure creates a continuous whole, avoiding weak points caused by separate connections. This enhances tool rigidity, better resists cutting forces, reduces tool deformation, and improves machining accuracy. Attached Figure Description

[0023] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings:

[0024] Figure 1 This is a schematic diagram of the overall structure of the milling cutter for machining the sealing ring hole as described in an embodiment of the present invention;

[0025] Figure 2 for Figure 1 A schematic diagram of the structure shown from another perspective;

[0026] Figure 3 for Figure 2 Enlarged view of the structure shown at point A in the middle;

[0027] Figure 4 This is a cross-sectional schematic diagram of the outer wall cutting edge according to an embodiment of the present invention;

[0028] Figure 5 This is a cross-sectional schematic diagram of the inner wall cutting edge according to an embodiment of the present invention.

[0029] Explanation of reference numerals in the attached figures:

[0030] 1. Tool holder;

[0031] 2. Cutting head; 21. Cutting tooth; 211. Cutting edge; 2111. Main cutting edge; 2112. Inner wall cutting edge; 2113. Outer wall cutting edge; 212. End milling edge; 22. Chip groove; 221. First sidewall; 222. Second sidewall;

[0032] R, radius of the fillet of the main cutting edge; α, angle between the outer and inner cutting edges; β1, rake angle of the outer cutting edge; β2, first clearance angle of the outer cutting edge; β3, second clearance angle of the outer cutting edge; β4, first clearance angle of the inner cutting edge; β5, second clearance angle of the inner cutting edge; L1, length of the tool holder; L2, length of the tool tip; D1, diameter of the tool holder; D2, diameter of the tool tip. Detailed Implementation

[0033] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0034] In the description of this utility model, it should be noted that if terms such as "upper," "lower," "inner," or "outer" appear, indicating orientation or positional relationship, they are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, if terms such as "first" or "second" appear, they are also used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0035] Furthermore, in the description of this utility model, unless otherwise explicitly defined, the terms "installation," "connection," "joining," and "connector" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model in light of the specific circumstances.

[0036] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0037] Example 1

[0038] This embodiment relates to a milling cutter for machining sealing ring holes, which can ensure the stability of the sealing ring placement, thereby improving the sealing performance of the equipment.

[0039] In terms of overall structure, combined Figures 1 to 5 As shown in the figure, the milling cutter for machining the sealing ring hole in this embodiment includes a cutter bar 1 and a cutter head 2 disposed on the cutter bar 1 and coaxially disposed on the cutter bar 1. The cutter head 2 is provided with a plurality of cutting teeth 21 arranged at intervals along the circumference of the cutter bar 1. Each cutting tooth 21 is used to mill the sealing ring hole. A chip discharge groove 22 for chip discharge is provided between each pair of adjacent cutting teeth 21. The top of each cutting tooth 21 is provided with a V-shaped cutting edge 211 facing the rotation direction of the cutter bar 1. Each cutting tooth 21 mills the sealing ring hole through the corresponding cutting edge 211.

[0040] At this time, as set as above, multiple cutting teeth 21 are set on the cutter head 2. By setting a V-shaped cutting edge 211 on the top of the cutting teeth 21, the sealing ring hole can be well fixed and locked after processing, ensuring the stability of the sealing ring, thereby avoiding the generation of sealing gaps and improving the sealing performance of the equipment.

[0041] In the specific structure, the cutting teeth 21 in this embodiment can be set to two. Of course, in addition to setting them to two, they can also be designed and adjusted according to actual needs, such as setting them to one, three, or four. Furthermore, in this embodiment, the length L1 of the cutting bar 1 is 49mm, the length L2 of the cutting head 2 is 31mm, the diameter D1 of the cutting bar 1 is 14mm, and the diameter D2 of the cutting head 2 is 14.5mm.

[0042] It should be noted that the included angle between each cutting edge 211 and the central axis of the tool holder 1 is the helix angle, and the helix angle in this embodiment is set equally.

[0043] Based on the above overall introduction, in this embodiment, as a preferred implementation, such as Figure 1As shown, each cutting edge 211 includes a main cutting edge 2111, an inner wall cutting edge 2112 for machining the inner wall of the sealing ring hole, and an outer wall cutting edge 2113 for machining the outer wall of the sealing ring hole. The main cutting edge 2111 has a rounded corner structure, and the ends of the inner wall cutting edge 2112 and the outer wall cutting edge 2113 are respectively connected to the two ends of the main cutting edge 2111.

[0044] It is understandable that the cutting edge 211 consists of the main cutting edge 2111, the outer wall cutting edge 2113, and the inner wall cutting edge 2112. During cutting, it is only necessary to move the machining center point of the milling cutter and the origin of the sealing ring hole to the same vertical line for vertical cutting, so as to complete the one-time machining of the sealing ring hole, which greatly improves the machining efficiency of the sealing ring hole.

[0045] Meanwhile, setting the main cutting edge 2111 to a rounded corner structure makes the cutting edge 211 smoother when cutting into the workpiece, reducing the impact between the cutting edge 211 and the workpiece, reducing sudden changes in cutting force, and thus improving the stability of the cutting process. In specific implementation, the milling cutter cuts into the workpiece surface through the main cutting edge 2111, and simultaneously processes the inner and outer walls of the sealing ring hole through the inner wall cutting edge 2112 and the outer wall cutting edge 2113, thus completing the one-time machining of the sealing ring hole.

[0046] It should be noted that the workpiece in this embodiment refers to a valve. After the mating surface of the valve is milled, the sealing ring is placed in the sealing ring hole to mate the two valves. This ensures that the fluid will not leak during fluid flow and guarantees the sealing performance of the equipment.

[0047] Furthermore, in this embodiment, as a preferred implementation, as shown in the figure, the radius R of the rounded corner of the main cutting edge 2111 is between 1.492mm and 1.508mm. Here, setting the radius R of the rounded corner of the main cutting edge 2111 to between 1.492mm and 1.508mm allows it to withstand greater cutting forces during the cutting process without easily being damaged. It also increases the contact area between the cutting edge 211 and the workpiece, preventing stress concentration at a single point on the cutting edge, thereby reducing the wear of the cutting edge 211.

[0048] In the specific structure, the radius R of the main cutting edge 2111 can be set to 1.5mm. Of course, in addition to setting it to 1.5mm, it can also be designed and adjusted according to actual needs, such as 1.492mm, 1.508mm, etc.

[0049] Meanwhile, the included angle α between the outer wall cutting edge 2113 and the inner wall cutting edge 2112 is between 41.5° and 42.5°. Maintaining the included angle α between 41.5° and 42.5° ensures the accuracy of the sealing ring hole dimensions, thereby ensuring a suitable fit clearance between the sealing ring and the hole wall, preventing loosening of the sealing ring, and improving sealing performance.

[0050] In the specific structure, the included angle α between the outer wall cutting edge 2113 and the inner wall cutting edge 2112 in this embodiment can be set to 42°. Of course, it can also be set according to the actual placement requirements of the sealing ring, such as 41.5°, 42.5°, etc.

[0051] Furthermore, in this embodiment, as a preferred implementation, such as Figure 2 As shown, each cutting tooth 21 has an end milling edge 212 connected to the corresponding inner wall cutting edge 2112 on its inner side. The end milling edge 212 is used to mill the workpiece surface to ensure that the workpiece surface is flat.

[0052] Therefore, by setting the end milling blade 212, the workpiece surface can be milled when machining the sealing ring hole, thus ensuring the flatness of the workpiece surface. At the same time, the height dimension between the workpiece surface and the bottom of the sealing ring hole can be kept consistent, which facilitates the installation of the workpiece.

[0053] In practice, the end milling blade 212 extends radially along the tool holder 1, with one end connected to the end of the corresponding inner wall cutting blade 2112 furthest from the main cutting blade 2111, and the cutting edge of the end milling blade 212 faces the direction of rotation of the tool holder 1. When cutting the sealing ring hole, the surface of the valve mating surface can be polished to ensure its flatness, preventing unevenness from causing gaps between the two valves and affecting the sealing effect.

[0054] In addition, in this embodiment, as a preferred implementation, such as Figure 1 As shown, each chip removal groove 22 extends along the axial direction of the tool holder 1 and gradually extends outward along the central axis of the tool holder 1. Furthermore, each chip removal groove 22 includes a first sidewall 221 and a second sidewall 222 extending radially along the tool holder 1. The side of the first sidewall 221 opposite to the outer edge of one cutting tooth 21 is connected to the side of the second sidewall 222 opposite to the outer edge of another cutting tooth 21.

[0055] Therefore, by extending the chip removal groove 22 along the axial direction of the tool holder 1 and arranging it outward along the central axis of the tool holder 1, cutting chips can be discharged in a timely manner, avoiding blockage caused by cutting chips.

[0056] Meanwhile, the chip removal groove 22 is composed of a first sidewall 221 and a second sidewall 222, thereby forming a clear guiding channel. During cutting, the first sidewall 221 and the second sidewall 222 can restrict the movement direction of the cutting chips, allowing them to be smoothly discharged along a predetermined path, preventing the cutting chips from randomly scattering or accumulating in the machining area. It should be understood that the chip removal groove 22 in this embodiment is formed by the first sidewall 221 and the second sidewall 222, and both the first sidewall 221 and the second sidewall 222 extend along the extending direction of the chip removal groove 22 (i.e., the axial direction of the tool holder 1).

[0057] Specifically, in this embodiment, as a preferred implementation, each second sidewall 222 is a concave arc surface. The advantage of this configuration is that by making the second sidewall 222 a concave arc surface, the cutting chips can be smoothly discharged along the curve of the arc surface, reducing the phenomenon of cutting chips getting stuck and accumulating. At the same time, it can also prevent cutting chips from splashing in all directions, reducing the impact of cutting chips on the equipment.

[0058] In the specific structure, the angle between the second sidewall 222 and the horizontal plane gradually decreases from the end of the second sidewall 222 away from the tool holder 1 to the end of the second sidewall 222 closer to the tool holder 1, that is, the second sidewall 222 is gradually inclined from the end away from the tool holder 1 to the end of the second sidewall 222 closer to the tool holder 1.

[0059] In addition, in this embodiment, as a preferred implementation, such as Figure 3 and Figure 4 As shown, the rake angle β1 of each outer wall cutting edge 2113 is 23°. This setting limits the rake angle β1 of the outer wall cutting edges 2113, which can reduce the impact of cutting force and cutting heat on the workpiece, reduce workpiece deformation during machining, and at the same time ensure more stable cutting of the milling edge, reduce the generation of cutting vibration, thereby improving machining accuracy.

[0060] Meanwhile, the first clearance angle β2 of each outer wall cutting edge 2113 is 12°, and the second clearance angle β3 of each outer wall cutting edge 2113 is 27°. Here, the first clearance angle β2 and the second clearance angle of the outer wall cutting edge 2113 are limited. By selecting appropriate angles, it helps to reduce the friction between the cutting edge 211 and the workpiece, thereby increasing the cutting speed and thus improving the cutting efficiency. At the same time, when encountering hard points in the material during milling, it can ensure that the cutting edge 211 has sufficient strength to resist these external forces and prevent chipping.

[0061] Furthermore, in this embodiment, as a preferred implementation, such as Figure 5As shown, the first clearance angle β4 of each inner wall cutting edge 2112 is 1°, and the second clearance angle β5 of each inner wall cutting edge 2112 is 12°. Limiting the angles of the first clearance angle β4 and the second clearance angle of the inner wall cutting edge 2112 can balance the components of the cutting force in different directions, thereby reducing the tool deflection phenomenon caused by the imbalance of cutting force and thus improving the machining accuracy.

[0062] It should be noted that in this embodiment, the first clearance angle of the end milling edge 212 is equal to the first clearance angle β4 of the inner wall cutting edge 2112, and the second clearance angle of the end milling edge 212 is equal to the second clearance angle β5 of the inner wall cutting edge 2112.

[0063] Furthermore, in this embodiment, as a preferred implementation, the tool holder 1, the tool head 2, each cutting tooth 21, and each cutting edge 211 are integrated into a single structure. This integration creates a continuous whole, avoiding weak points caused by separate connections, enhancing the rigidity of the tool, better resisting cutting forces, reducing tool deformation, and improving machining accuracy.

[0064] In this embodiment, the milling cutter for machining the sealing ring hole only needs to be moved to the same vertical line as the origin of the sealing ring hole for vertical machining. The main cutting edge 2111 cuts into the valve mating surface, and the outer wall cutting edge 2113 and the inner wall cutting edge 2112 cut the outer and inner walls of the sealing ring hole respectively. This allows the sealing ring to be placed in the machined sealing ring hole, preventing the sealing ring from loosening and thus ensuring the sealing performance of the equipment.

[0065] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A milling cutter for machining sealing ring holes, characterized in that: The tool includes a tool holder (1) and a tool head (2) coaxially disposed on the tool holder (1). The tool head (2) is provided with a plurality of cutting teeth (21) arranged at circumferential intervals along the tool holder (1). Each cutting tooth (21) is used to mill the sealing ring hole. A chip discharge groove (22) for chip discharge is provided between each two adjacent cutting teeth (21). The top of each cutting tooth (21) is provided with a V-shaped cutting edge (211) facing the rotation direction of the tool holder (1). Each cutting tooth (21) mills the sealing ring hole through the corresponding cutting edge (211). Each of the cutting edges (211) includes a main cutting edge (2111), an inner wall cutting edge (2112) for machining the inner wall of the sealing ring hole, and an outer wall cutting edge (2113) for machining the outer wall of the sealing ring hole. The main cutting edge (2111) has a rounded corner structure. The ends of the inner wall cutting edge (2112) and the outer wall cutting edge (2113) are respectively connected to the two ends of the main cutting edge (2111).

2. The milling cutter for machining sealing ring holes according to claim 1, characterized in that: The radius R of the fillet of the main cutting edge (2111) ranges from 1.492 mm to 1.508 mm; and / or, The included angle α between the outer wall cutting edge (2113) and the inner wall cutting edge (2112) is between 41.5° and 42.5°.

3. The milling cutter for machining sealing ring holes according to claim 1, characterized in that: Each of the cutting teeth (21) has an end milling edge (212) on its inner side that is connected to the corresponding inner wall cutting edge (2112). The end milling edge (212) is used to mill the surface of the workpiece to ensure that the surface of the workpiece is flat.

4. The milling cutter for machining sealing ring holes according to claim 1, characterized in that: Each of the chip removal grooves (22) extends along the axial direction of the tool holder (1) and is arranged to extend outward along the central axis of the tool holder (1); Each of the chip removal grooves (22) includes a first sidewall (221) and a second sidewall (222) extending radially along the cutter bar (1). The sidewall (221) opposite to the outer edge of one of the cutter teeth (21) is connected to the sidewall (222) opposite to the outer edge of the other cutter tooth (21).

5. The milling cutter for machining sealing ring holes according to claim 4, characterized in that: Each of the second sidewalls (222) is a concave arc surface.

6. The milling cutter for machining sealing ring holes according to claim 1, characterized in that: The rake angle β1 of each of the aforementioned outer wall cutting edges (2113) is 23°; and / or, The first clearance angle β2 of each of the outer wall cutting edges (2113) is 12°, and the second clearance angle β3 of each of the outer wall cutting edges (2113) is 27°.

7. The milling cutter for machining sealing ring holes according to claim 1, characterized in that: The first clearance angle β4 of each of the inner wall cutting edges (2112) is 1°, and the second clearance angle β5 of each of the inner wall cutting edges (2112) is 12°.

8. The milling cutter for machining sealing ring holes according to claim 1, characterized in that: The tool holder (1), the tool head (2), each of the tool teeth (21) and each of the cutting edges (211) are an integral structure.

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