Milling blade

Abstract

The utility model discloses a milling blade, which belongs to the technical field of milling cutters and comprises a milling cutter head assembly, a milling blade body and a mounting clamping groove. A plurality of cooling liquid storage holes are formed in each milling blade body in an annular array mode, the exteriors of the cooling liquid storage holes are detachably connected in a sealed mode through rubber sealing plugs, and the outer wall of the peripheral side of each milling blade body is integrally connected and wrapped with a supporting rib ring component. The supporting rib ring component is located between the first milling end and the second milling end of the milling blade body, so that the supporting rib ring component can provide supporting force for the first milling end and the second milling end during milling, and the strength and the milling efficiency of the milling blade body are improved. According to the utility model, the stress in the cutting process is effectively dispersed, and the deformation of the blade body in use is reduced, so that the service life of the cutter is prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of milling cutters, in particular to a milling blade. Background Art

[0002] Milling inserts are tools used in milling operations, typically mounted on the milling cutter head or milling arbor of a CNC machine tool, to cut metal or other materials. Milling is a common metalworking process used in a variety of industries, including machinery manufacturing, aerospace, and automotive manufacturing.

[0003] In modern manufacturing, milling cutters are key tools for achieving this process, and their performance directly impacts machining quality and production efficiency. However, existing milling cutters suffer from numerous deficiencies in practical applications, particularly for applications requiring long, continuous operation and high loads. Existing cutter designs often struggle to meet stable operating requirements. During machining, milling cutters, lacking effective support structures, are prone to blade deformation or breakage due to stress concentration. This, especially after a period of use, increases tool wear and shortens tool life.

[0004] After searching, the existing Chinese patent publication number: CN204277044U negative milling insert includes a blade body, the blade body has upper and lower surfaces and a quadrilateral outer peripheral surface, and is also provided with a through hole and bosses around it, and the outer peripheral surface is alternately configured with a main cutting edge and a polishing edge in sequence; the main cutting edge is a concave structure, starting from its two ends and gradually tilting toward the opposite sides of the upper and lower surfaces, and forming a flat main cutting edge middle part without tilt at 1 / 6-1 / 3 of the main cutting edge length; the rake face of the flat main cutting edge middle part without tilt of the negative blade body extends at a gentle positive angle to the through hole perpendicular to the upper and lower surfaces, and forms an open chip groove leading to the through hole at the boss.

[0005] The cited patent documents also have the same problem. Due to the lack of an effective support structure, the blade is easily deformed or broken due to stress concentration. Especially after a period of use, the wear of the tool is aggravated and the service life is short. Utility Model Content

[0006] The purpose of the utility model is to provide a milling insert to solve the problems raised in the background technology.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solution: a milling insert, comprising:

[0008] A milling cutter head assembly is mounted on the spindle or tool holder of a CNC machine tool for use in machining workpieces. The milling cutter head assembly includes a connector connected to the spindle or tool holder and a plurality of blade seats arranged in an annular array on the free end face of the connector;

[0009] A milling insert body is mounted on the free end of each insert seat and is used for directly milling a product workpiece;

[0010] A mounting slot is integrally provided at the free end of each insert seat for carrying and mounting the milling insert body;

[0011] Among them, the internal annular array of each milling blade body is provided with a plurality of coolant storage holes, and the outside of each coolant storage hole is detachably sealed by a rubber sealing plug, so that the coolant in the coolant storage hole is used to cool the milling blade body during milling processing. The peripheral outer wall of each milling blade body is integrally connected and wrapped with a support rib ring component, and the support rib ring component is located between the first milling end and the second milling end of the milling blade body, so that the support rib ring component can provide support force for the first milling end and the second milling end during milling processing. Regardless of whether the milling blade body uses the first milling end or the second milling end for milling processing, the support rib ring component can provide stable support force, thereby improving the strength of the milling blade body and the milling efficiency.

[0012] Preferably, the inner bottom wall of each mounting slot is bonded with a silicone gasket, so that the peripheral outer wall of the milling blade body and the outer wall of the supporting rib ring component are in contact with the surface of the silicone gasket.

[0013] Preferably, the inner bottom wall of each mounting slot is provided with a positioning slot below the silicone gasket for positioning the supporting rib ring component. When the milling blade body is installed in the mounting slot, the supporting rib ring component on the peripheral side of the milling blade body is snapped into the positioning slot.

[0014] Preferably, in this solution, each of the supporting rib ring components is located at the middle position of the peripheral outer wall facing away from the milling insert body and a stress release arc groove is opened along the annular trajectory of the supporting rib ring component, and the arc center of the stress release arc groove is arranged facing away from the milling insert body.

[0015] Preferably, the milling insert body is installed in the mounting slot via a fastener, and the fastener is detachably connected to the milling insert body and the mounting slot respectively.

[0016] Preferably, the fastener comprises a fastening bolt, and a support backrest is provided inside the mounting slot, and the support backrest is used to support the back of the milling blade body.

[0017] Preferably, the inner wall of the support back portion is provided with an internal threaded connection hole for connection with a fastening bolt, and the interior of the milling insert body is provided with a through hole for passing the fastening bolt.

[0018] Preferably, the inner wall of the nut end of the fastening bolt is provided with an adapting fastening end head, and the inner wall of the through hole of the milling insert body is provided with an adapting slope for supporting the adapting fastening end head.

[0019] Preferably, the inner wall of the adapting slope is provided with an annular inner groove, in which an anti-slip fastening silicone ring strip is embedded. When the adapting fastening end head is adapted to the adapting slope, the adapting fastening end head squeezes the anti-slip fastening silicone ring strip, thereby increasing friction, improving fastening and reducing looseness.

[0020] Compared with the prior art, the technical effects and advantages of this utility model are:

[0021] The milling insert's support rib design provides additional support for the first and second milling ends, effectively dispersing stress during cutting and reducing deformation of the insert during use, thereby extending the tool's service life. The positioning grooves and support ribs, combined with the support ribs, ensure the insert's precise positioning within the mounting slots, reducing machining deviations caused by installation errors and improving part precision.

[0022] The coolant reservoir and rubber seal allow coolant to flow directly into the hot zone of the blade during operation, effectively reducing blade temperature, improving thermal stability, and enhancing cooling efficiency. The arc-shaped stress-relieving groove helps disperse stress, preventing fatigue damage to the blade during extended use or high-intensity operating conditions, further enhancing the tool's overall structural stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0024] Figure 1 It is a structural diagram of the utility model;

[0025] Figure 2 This is a schematic structural diagram of the milling insert body of the present invention in a disassembled state;

[0026] Figure 3 This is a schematic structural diagram of the support rib ring component of the utility model in an installed state;

[0027] Figure 4 For this utility model Figure 2Schematic diagram of the enlarged structure at A in the middle;

[0028] Figure 5 This is a schematic structural diagram of the anti-slip fastening silicone ring strip of the present invention;

[0029] Figure 6 This is a schematic structural diagram of the adapting and fastening end portion of the present invention;

[0030] Figure 7 This is a schematic structural diagram of the coolant storage hole of the present invention.

[0031] Description of reference numerals:

[0032] In the figure: 1. Milling head assembly; 2. Connector; 3. Blade seat; 4. Milling blade body; 5. Mounting slot; 6. Fastener; 7. Positioning card groove; 8. Internal thread connection hole; 9. First milling end; 10. Second milling end; 11. Support rib ring component; 12. Stress relief arc groove; 13. Silicone gasket; 14. Support backrest; 15. Adaptive slope; 16. Adaptive fastening end head; 17. Anti-slip fastening silicone ring strip; 18. Rubber sealing plug; 19. Coolant storage hole. DETAILED DESCRIPTION

[0033] In the following description, numerous specific details are provided to provide a more thorough understanding of the present invention. However, it will be apparent to those skilled in the art that the present invention can be practiced without one or more of these details. In other instances, certain technical features known in the art are not described to avoid confusion with the present invention.

[0034] Unless otherwise defined, the directions of up, down, left, right, front, back, inside and outside involved in this document are based on the directions of up, down, left, right, front, back, inside and outside shown in the figures of the present invention, and are explained here together.

[0035] This embodiment provides Figures 1 to 7 The milling insert shown in the figure includes a milling cutter head assembly 1. As the core component of the entire milling tool, the milling cutter head assembly 1 is responsible for connecting to the spindle or tool holder of the CNC machine tool, ensuring that the milling insert body 4 can perform machining operations in the correct axial direction. Its design ensures that the milling tool can be firmly fixed to the machine tool and maintains stability even at high-speed rotation.

[0036] In this embodiment, a milling cutter head assembly 1 is mounted on the spindle or toolholder of a CNC machine tool for use in machining workpieces. The milling cutter head assembly 1 includes a connector 2 connected to the spindle or toolholder and a plurality of blade seats 3 arranged in a circular array on the free end face of the connector 2. The connector 2 is used to connect the milling cutter head assembly 1 to the spindle or toolholder of the machine tool, ensuring that the milling tool can efficiently transmit power from the machine tool while providing ease of installation and removal. The blade seats 3 serve as the basic platform for mounting the milling blade bodies 4. They are distributed in a circular array on the free end face of the connector 2 to facilitate rapid replacement and adjustment of the blade bodies 4 while also ensuring the positional accuracy of the blades during operation.

[0037] In this embodiment, a milling insert body 4 is mounted at the free end of each insert seat 3 and is used to directly mill the workpiece. The milling insert body 4 is the component that actually performs the milling work and has a first milling end 9 and a second milling end 10, which can be selected according to different processing requirements. The design of the insert body 4 improves the tool's flexibility and applicability.

[0038] In this embodiment, the mounting slot 5 is integrally arranged at the free end of each blade seat 3 for supporting and installing the milling blade body 4; the mounting slot 5 is a key structure on the blade seat 3, which is used to fix and position the milling blade body 4 to ensure that the blade will not be displaced during the processing, thereby ensuring the processing accuracy.

[0039] In this embodiment, each milling insert body 4 is provided with a plurality of coolant reservoir holes 19 arranged in an annular array within the insert body. Each coolant reservoir hole 19 is removably sealed to the outside via a rubber seal 18, allowing the coolant in the coolant reservoir hole 19 to cool the insert body 4 during milling. The rubber seal 18 seals the coolant reservoir hole 19, preventing coolant leakage and ensuring the proper operation of the cooling system. The coolant reservoir holes 19 are designed within the insert body 4, with the rubber seal 18 controlling the flow of coolant. This effectively reduces heat generated by the insert during high-speed operation and improves the tool's service life. The coolant in the coolant reservoir holes 19 is preferably a synthetic coolant, which has low volatility because it is formulated with water-soluble additives and does not contain mineral oil. The relatively low volatility of synthetic coolants makes them more suitable for long-term, closed-loop use. The design of the coolant reservoir holes 19 effectively reduces external coolant splashing, helping to maintain a clean workshop and minimizing potential hazards to operators. The coolant in the coolant reservoir holes 19 helps lower the temperature between the tool and the workpiece, reducing thermal deformation.

[0040] In this embodiment, the outer peripheral wall of each milling insert body 4 is integrally connected and wrapped with a support rib ring component 11. The support rib ring component 11 is located between the first milling end 9 and the second milling end 10 of the milling insert body 4, so that the support rib ring component 11 can provide support for the first milling end 9 and the second milling end 10 during milling. Regardless of whether the milling insert body 4 is milling using the first milling end 9 or the second milling end 10, the support rib ring component 11 can provide stable support, thereby improving the strength and milling efficiency of the milling insert body 4. The first milling end 9 and the second milling end 10 are the working surfaces of the insert body 4. Either end can be selected for use according to processing needs, thereby increasing the tool's service life and processing versatility. The support rib ring component 11 is located between the first milling end 9 and the second milling end 10, providing additional structural support for the insert body 4, helping to disperse stress, prevent blade deformation, and improve the blade's rigidity and durability.

[0041] In this embodiment, a silicone gasket 13 is bonded to the inner bottom wall of each mounting slot 5, so that the peripheral outer wall of the milling insert body 4 and the outer wall of the supporting rib ring component 11 both abut against the surface of the silicone gasket 13. The silicone gasket 13 is placed on the inner bottom wall of the mounting slot 5 to help reduce vibration between the insert body 4 and the insert seat 3, thereby improving processing quality.

[0042] In this embodiment, a positioning groove 7 is formed on the inner bottom wall of each mounting slot 5 and below the silicone gasket 13 to accommodate the positioning of the support rib ring component 11. When the milling blade body 4 is installed in the mounting slot 5, the support rib ring component 11 on the peripheral side of the milling blade body 4 is engaged with the positioning groove 7. The positioning groove 7 cooperates with the support rib ring component 11 to ensure that the blade body 4 is installed in place, further enhancing the position stability of the blade.

[0043] In this embodiment, each support rib ring component 11 is provided with a stress-relieving arcuate groove 12 in the middle of the peripheral outer wall facing away from the milling insert body 4, along the annular trajectory of the support rib ring component 11. The arc center of the stress-relieving arcuate groove 12 is arranged facing away from the milling insert body 4. The design of the stress-relieving arcuate groove 12 helps to reduce stress concentration generated by the support rib ring component 11 when subjected to external forces, thereby extending the service life of the insert.

[0044] In this embodiment, the milling insert body 4 is mounted in the mounting slot 5 via a fastener 6, which is detachably connected to the milling insert body 4 and the mounting slot 5. The fastener 6 is used to secure the milling insert body 4 in the mounting slot 5, preventing the insert from falling off during machining and enhancing the safety of the system.

[0045] In this embodiment, the fastener 6 includes a fastening bolt, and a support backrest 14 is further provided inside the mounting slot 5. The support backrest 14 is used to support the back of the milling blade body 4. The support backrest 14 provides support for the back of the blade body 4, ensuring the stability of the blade installation.

[0046] In this embodiment, the inner wall of the support backrest 14 defines an internally threaded connection hole 8 for fastening bolts, and the interior of the milling insert body 4 defines a through-hole for the fastening bolts. The internally threaded connection hole 8 is used to install the fastener 6, allowing the milling insert body 4 to be fixed to the insert seat 3 via a threaded connection, facilitating assembly and disassembly and maintenance.

[0047] In this embodiment, the inner wall of the nut end of the fastening bolt is provided with an adaptable fastening end head 16, and the inner wall of the through-hole of the milling blade body 4 is provided with an adaptable ramp 15 for supporting the adaptable fastening end head 16. The adaptable ramp 15 and the adaptable fastening end head 16 work together to ensure that the fastener 6 can properly secure the blade body 4 while preventing damage to the blade due to overtightening.

[0048] In this embodiment, an annular inner groove is formed on the inner wall of the adapting slope 15, and an anti-slip fastening silicone ring strip 17 is embedded in the annular inner groove. When the adapting fastening end head 16 is adapted to the adapting slope 15, the adapting fastening end head 16 squeezes the anti-slip fastening silicone ring strip 17, thereby increasing friction, improving the fastening degree, and preventing the blade from loosening during processing.

[0049] Working principle:

[0050] The milling blade first prepares a milling head assembly 1, which includes a connecting head 2 and multiple blade seats 3. Each blade seat 3 has a mounting slot 5. A silicone gasket 13 is adhered to the inner bottom wall of each mounting slot 5. The silicone gasket 13 is used to reduce the vibration between the milling blade body 4 and the mounting slot 5 and protect both from damage. A positioning card groove 7 is opened below the silicone gasket 13 on the inner bottom wall of each mounting slot 5. The positioning card groove 7 is used to ensure the correct positioning of the support rib ring component 11.

[0051] Prepare the milling blade body 4, which includes a first milling end 9 and a second milling end 10, as well as an integrated supporting rib ring component 11 on its peripheral outer wall. Align the supporting rib ring component 11 of the milling blade body 4 with the positioning card groove 7 in the mounting slot 5, and place the blade body 4 into the mounting slot 5. As the blade body 4 goes deeper, the supporting rib ring component 11 will be clamped into the positioning card groove 7 to ensure that the position of the blade body 4 in the mounting slot 5 is accurate. Use a fastener 6, such as a fastening bolt, to connect the internal threaded connection hole 8 on the support backrest 14 in the mounting slot 5 through the through hole on the blade body 4 to fix the blade body 4 on the blade seat 3. The nut end of the fastener 6 has an adapting fastening end head 16, which cooperates with the adapting slope 15 in the through hole of the milling blade body 4. When the adapting fastening end head 16 is tightened, it will squeeze the anti-slip fastening silicone ring strip 17 embedded in the annular inner groove of the adapting slope 15 to increase friction and ensure the fastening effect.

[0052] A plurality of coolant storage holes 19 are provided in a circular array inside the blade body 4. These holes are sealed with rubber sealing plugs 18 on the outside. When cooling is required, coolant is injected and the coolant flows into the coolant storage holes 19 to provide a cooling effect when the blade is working and reduce the blade temperature.

[0053] Install the assembled milling cutter head assembly 1 onto the spindle or tool holder of the CNC machine tool, start the machine tool, and make the milling cutter head assembly 1 start to rotate. Select to use the first milling end 9 or the second milling end 10 for processing according to the workpiece processing requirements. During the processing, the coolant flows out from the coolant storage hole 19 and is sprayed to the working blade end, taking away the heat generated during the cutting process and keeping the blade at a low temperature. During the entire processing process, the supporting rib ring component 11 provides the necessary support force for the blade body 4 to prevent the blade from bending or breaking due to excessive force; at the same time, the silicone gasket 13 reduces the vibration between the blade and the blade seat 3. After the processing is completed, the worn milling blade body 4 can be easily replaced by removing the fastener 6.

[0054] It should be noted that, in this article, relational terms such as one and two are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include," "comprise," or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article, or device. In the absence of further restrictions. The phrase "includes an element defined by ... does not exclude the presence of other identical elements in the process, method, article, or device that includes the element."

[0055] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A milling insert, characterized in that: include: A milling cutter head assembly (1) is mounted on a spindle or a tool holder of a numerically controlled machine tool for use in machining a workpiece, the milling cutter head assembly (1) comprising a connector (2) connected to the spindle or the tool holder and a plurality of blade seats (3) arranged in an annular array on a free end face of the connector (2); A milling blade body (4) is mounted on the free end of each blade seat (3) and is used for directly milling a product workpiece; A mounting slot (5) is integrally provided at the free end of each blade seat (3) for supporting and mounting the milling blade body (4); Each of the milling blade bodies (4) is provided with a plurality of coolant storage holes (19) in an internal annular array, and the outside of each of the coolant storage holes (19) is detachably sealed by a rubber sealing plug (18), and the peripheral outer wall of each of the milling blade bodies (4) is integrally connected and wrapped with a supporting rib ring component (11), and the supporting rib ring component (11) is located between the first milling end (9) and the second milling end (10) of the milling blade body (4).

2. The milling insert according to claim 1, characterized in that: A silicone gasket (13) is bonded to the inner bottom wall of each mounting slot (5), so that the peripheral outer wall of the milling blade body (4) and the outer wall of the supporting rib ring component (11) are in contact with the surface of the silicone gasket (13).

3. The milling insert according to claim 2, characterized in that: A positioning card groove (7) for positioning the supporting rib ring component (11) is provided on the inner bottom wall of each of the mounting card grooves (5) and below the silicone gasket (13); when the milling blade body (4) is installed in the mounting card groove (5), the supporting rib ring component (11) on the peripheral side of the milling blade body (4) is snapped into the positioning card groove (7).

4. The milling insert according to claim 3, characterized in that: Each of the supporting rib ring components (11) faces away from the middle position of the peripheral outer wall of the milling blade body (4) and is provided with a stress release arc groove (12) according to the annular trajectory of the supporting rib ring component (11), and the arc center of the stress release arc groove (12) is arranged away from the milling blade body (4).

5. The milling insert according to claim 4, characterized in that: The milling blade body (4) is installed in the mounting slot (5) via a fastener (6), and the fastener (6) is detachably connected to the milling blade body (4) and the mounting slot (5).

6. The milling insert according to claim 5, characterized in that: The fastener (6) includes a fastening bolt, and a support backrest (14) is further provided inside the mounting slot (5), wherein the support backrest (14) is used to support the back of the milling blade body (4).

7. The milling insert according to claim 6, characterized in that: An internal thread connection hole (8) for fastening bolt connection is provided on the inner wall of the support backrest (14), and a through hole for the fastening bolt to pass through is provided inside the milling blade body (4).

8. The milling insert according to claim 7, characterized in that: An adaptable fastening end head (16) is provided on the inner wall of the nut end of the fastening bolt, and an adaptable slope (15) for supporting the adaptable fastening end head (16) is provided on the inner wall of the through hole of the milling blade body (4).

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