End mill with variable taper

Abstract

The utility model discloses an end mill with variable taper, and relates to the field of milling cutters. The milling cutter comprises a milling cutter main body, one end of the milling cutter main body is provided with a milling cutter end part, the outer side of the milling cutter end part is provided with a protection mechanism, the protection mechanism comprises a protection sleeve shell, the protection sleeve shell is in threaded connection with the milling cutter end part, one side of the protection sleeve shell is provided with a protection ring, and the protection ring is connected with the milling cutter end part. The protective sleeve shell of the protective mechanism is in threaded connection with the end portion of the milling cutter, the blocking piece and the open hole are arranged in a matched mode, transverse splashing of cooling liquid is directly limited, the risk that the machining environment is disordered is reduced, operation safety is improved, and meanwhile the open groove and the cutting groove outside the protective sleeve shell form a slag returning channel. Cuttings and part of cooling liquid are guided to be discharged directionally, cutter abrasion and machining face scratching caused by cuttings accumulation are reduced, the cooling liquid is accurately conveyed to a cutting area of the auxiliary milling cutter through the circulation channel in the central axis of the milling cutter body, the cooling efficiency is improved, and liquid consumption is reduced.

Description

Technical Field

[0001] This utility model relates to the field of milling cutters, specifically an end mill with variable taper. Background Technology

[0002] A face milling cutter is a milling tool used for machining flat surfaces. It has cutting edges on both its circumference and end face, with the main cutting edge located on the outer circle and the secondary cutting edge located on the end face. It has both high-efficiency cutting and scraping functions. According to its structure, it is divided into integral type, insert type and indexable type. The latter two are widely used because the inserts can be replaced. Carbide face milling cutters are the first choice for machining materials such as steel and cast iron due to their high cutting efficiency and long service life, and are especially suitable for CNC milling.

[0003] Currently, face milling cutters have a coolant flow channel along their central axis and a through hole opposite the sub-cutting cutter. This allows coolant to be directly sprayed onto the surface of the sub-cutting cutter, thus extending the cutter's lifespan. However, a problem exists in actual use: the rapid rotation of the cutter and the collision of the sub-cutting cutter with the coolant cause coolant to splash. This splashed coolant can easily affect operators in cluttered machining environments, potentially splashing coolant onto them and reducing the operator's direct observation of the milled surface. Therefore, the inventor urgently needs to design a protective mechanism that reduces coolant splashing, thereby improving the ease of use of face milling cutters. Utility Model Content

[0004] Therefore, the purpose of this utility model is to provide an end mill with a variable taper to solve the technical problem of coolant splashing in face mills.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a milling cutter with variable taper, comprising a milling cutter body, a milling cutter end being provided at one end of the milling cutter body, and a protective mechanism being provided on the outer side of the milling cutter end;

[0006] The protective mechanism includes a protective sleeve that is threaded to the end of the milling cutter. A protective ring is provided on one side of the protective sleeve, and a baffle is fixedly provided on one side of the protective ring. Several cutting grooves are provided on the outer surface of the end of the milling cutter, and several openings are provided on one side of the cutting grooves. The openings are positioned opposite to the baffles to limit the splashing of coolant.

[0007] By adopting the above technical solution, the threaded connection between the protective sleeve and the end of the milling cutter in the protective mechanism enables the rapid installation and disassembly of the protective structure, facilitating maintenance and adjustment. The annular blocking structure formed by the protective sleeve, protective ring, and baffle can directly cover the opening at the end of the milling cutter, physically restricting the direction of coolant splashing during cutting, significantly reducing the risk of lateral splashing, and improving operational safety.

[0008] Furthermore, the outer surfaces of the protective sleeve and the protective ring are provided with grooves, and the grooves are positioned opposite to the cutting grooves, serving as slag removal grooves for cutting fluid and cutting slag.

[0009] By adopting the above technical solution, the slots opened on the outer surface of the protective sleeve and the protective ring correspond to the cutting grooves, forming a continuous slag removal channel. This can guide the chips and coolant to be discharged efficiently in a preset direction during the cutting process, avoiding tool wear or scratches on the machined surface caused by chip retention.

[0010] Furthermore, a flow channel is provided at the central axis of the milling cutter body, and the flow channel is connected to the opening and the external coolant delivery device.

[0011] By adopting the above technical solution, a centralized coolant delivery system was constructed, which can directly deliver coolant to the cutting contact point of the sub-milling cutter to achieve localized and efficient cooling. At the same time, it avoids the dispersion defects of traditional external cooling coolant spraying, reduces coolant consumption through directional spraying, and lowers processing costs.

[0012] Furthermore, a locking nut ring is threaded onto the outer side of the end of the milling cutter, and the locking nut ring abuts against the protective sleeve.

[0013] By adopting the above technical solution, the position of the protective mechanism can be effectively fixed to prevent it from shifting or loosening under high-speed rotation or vibration conditions, thus ensuring the continuous stability of the protective function. At the same time, the threaded connection of the locking nut ring simplifies the installation process of the protective mechanism, allowing for quick locking or disassembly without additional tools, greatly improving the ease of operation.

[0014] Furthermore, the end face of the protective ring is not on the same plane as the milling surface of the end mill, so as to avoid the presence of the protective sleeve and protective ring affecting the normal operation of the end mill body.

[0015] By adopting the above technical solution, it is possible to avoid interference between the protective mechanism and the workpiece or chips during the cutting process, and to ensure that the cutting action of the milling cutter body is not hindered.

[0016] Furthermore, a secondary milling cutter is detachably mounted on the other side of the cutting groove via bolts. The secondary milling cutter may have two, but is not limited to, two taper feature forms.

[0017] By adopting the above technical solution, the secondary milling cutter can be detachably installed on the sidewall of the cutting groove by bolts, realizing the rapid switching of different taper features. It can adapt to the diverse workpiece contour requirements without replacing the entire tool, significantly reducing processing costs and time.

[0018] Furthermore, the protective sleeve and the protective ring are an integral structure, and both are made of stainless steel.

[0019] By adopting the above technical solutions, the overall rigidity and deformation resistance of the protective mechanism can be significantly improved, making it particularly suitable for high-speed cutting or heavy-duty machining scenarios. At the same time, the stainless steel material has excellent corrosion resistance and wear resistance, which can effectively resist coolant erosion and chip impact, extending the service life of the protective mechanism.

[0020] In summary, the present invention has the following main advantages:

[0021] 1. This utility model directly limits the lateral splashing of coolant by connecting the protective sleeve of the protective mechanism to the end of the milling cutter with threads, and by aligning the baffle and the opening. This reduces the risk of a messy processing environment and improves operational safety. At the same time, the slots on the outside of the protective sleeve and the cutting groove form a slag removal channel, which guides the chips and some coolant to be discharged in a directional manner, reducing tool wear and scratches on the machining surface caused by chip accumulation. The flow channel at the central axis of the milling cutter body accurately delivers coolant to the cutting area of ​​the secondary milling cutter, improving cooling efficiency and reducing liquid consumption.

[0022] 2. This utility model uses the height difference between the end face of the protective ring and the milling surface of the end mill to avoid interference of the protective structure with the cutting action, ensure smooth machining, and ensure the normal operation of the cutting work. Attached Figure Description

[0023] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0024] Figure 2 This is a three-dimensional assembly structure diagram of the protective mechanism of this utility model;

[0025] Figure 3 This is a cross-sectional structural diagram of the present invention;

[0026] Figure 4 This is a schematic diagram of the end of the milling cutter of this utility model.

[0027] In the diagram: 1. Milling cutter body; 2. Milling cutter end; 3. Cutting groove; 4. Sub-milling cutter; 5. Protective mechanism; 501. Protective sleeve; 502. Protective ring; 503. Baffle; 504. Slot; 6. Locking nut ring; 701. Flow channel; 702. Opening. Detailed Implementation

[0028] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0029] In this embodiment:

[0030] An end mill with variable taper, such as Figure 1-4 As shown, it includes a milling cutter body 1, a milling cutter end 2 is provided at one end of the milling cutter body 1, and a protective mechanism 5 is provided on the outside of the milling cutter end 2;

[0031] The protective mechanism 5 includes a protective sleeve 501, which is threadedly connected to the end of the milling cutter 2. A protective ring 502 is provided on one side of the protective sleeve 501, and a baffle 503 is fixedly provided on one side of the protective ring 502. Several cutting grooves 3 are formed on the outer surface of the end of the milling cutter 2, and several openings 702 are formed on one side of the cutting grooves 3. The openings 702 and the baffle 503 are positioned opposite each other to limit the splashing of coolant. The threaded connection between the protective sleeve 501 and the end of the milling cutter 2 in the protective mechanism 5 enables quick installation and disassembly of the protective structure, facilitating maintenance and adjustment. The annular blocking structure formed by the protective sleeve 501, the protective ring 502, and the baffle 503 can directly cover the openings 702 of the end of the milling cutter 2, physically limiting the direction of coolant splashing during cutting, significantly reducing the risk of lateral splashing and improving operational safety. At the same time, the alignment of the baffle 503 and the openings 702 ensures that the coolant is accurately guided to the cutting area of ​​the secondary milling cutter 4, avoiding a decrease in cooling efficiency due to liquid flow dispersion.

[0032] See Figure 1 , Figure 2 The outer surfaces of the protective sleeve 501 and the protective ring 502 are provided with slots 504, and the slots 504 are opposite to the cutting groove 3. These slots serve as slag removal channels for cutting fluid and cutting slag. The slots 504 on the outer surfaces of the protective sleeve 501 and the protective ring 502 correspond to the cutting groove 3, forming a continuous slag removal channel. This channel can guide the chips and coolant to be discharged efficiently in a preset direction during the cutting process, avoiding tool wear or scratches on the machined surface caused by chip retention. At the same time, the geometric structure of the slots 504 and the coordinated design of the cutting groove 3 enhance the smoothness of the chip removal process and reduce the risk of equipment downtime caused by chip entanglement.

[0033] See Figure 3 , Figure 4A flow channel 701 is provided at the central axis of the milling cutter body 1. The flow channel 701 is connected to the opening 702 and the external coolant delivery device, forming a centralized coolant delivery system. This system can directly deliver coolant to the cutting contact point of the secondary milling cutter 4, achieving localized and efficient cooling. At the same time, it avoids the dispersion defects of traditional external cooling coolant spraying. By directional spraying, the amount of coolant used is reduced, thus lowering the processing cost. In addition, the through structure of the flow channel 701 and the opening 702 can be adapted to cooling systems with different flow requirements. It can meet the high-pressure cooling requirements of heavy cutting conditions and is also compatible with the low flow requirements of precision machining, significantly improving the environmental adaptability and process compatibility of the milling cutter.

[0034] See Figure 1 , Figure 2 , Figure 3 The outer side of the end of the milling cutter 2 is threaded with a locking nut ring 6, which abuts against the protective sleeve 501. This effectively fixes the position of the protective mechanism 5, preventing it from shifting or loosening under high-speed rotation or vibration conditions, thus ensuring the continuous stability of the protective function. At the same time, the threaded connection of the locking nut ring 6 simplifies the installation process of the protective mechanism, allowing for quick locking or disassembly without additional tools, greatly improving operational convenience. In addition, this structure enhances the fit between the protective sleeve 501 and the end of the milling cutter 2 through mechanical preload, reducing the risk of coolant leakage from the connection gap and further optimizing the protective effect, making it particularly suitable for long-term continuous machining scenarios.

[0035] See Figure 1 , Figure 2 , Figure 3 The end face of the protective ring 502 is not on the same plane as the milling surface of the end of the milling cutter 2. This avoids the presence of the protective sleeve 501 and the protective ring 502 affecting the normal operation of the milling cutter body 1. It can prevent the protective mechanism 5 from interfering with the workpiece or chips during the cutting process, ensuring that the cutting action of the milling cutter body 1 is not hindered. At the same time, this height difference provides sufficient space for chip discharge, preventing chips from accumulating between the protective ring 502 and the milling surface, and reducing tool damage caused by secondary cutting of chips.

[0036] See Figure 1 , Figure 2 , Figure 4On the other side of the cutting groove 3, a secondary milling cutter 4 is detachably mounted via bolts. The secondary milling cutter 4 has two, but not limited to, two taper characteristics. The secondary milling cutter 4 is detachably mounted on the side wall of the cutting groove 3 via bolts, which realizes the rapid switching of different taper characteristics. It can adapt to the diverse workpiece contour requirements without changing the entire tool, significantly reducing processing costs and time. At the same time, the modular setting of the secondary milling cutter 4 allows users to flexibly select taper parameters according to processing requirements. For example, a large taper secondary milling cutter can be used for roughing to improve efficiency, and a small taper secondary milling cutter can be switched for finishing to improve accuracy, thereby expanding the application range of the milling cutter.

[0037] See Figure 1 , Figure 2 , Figure 3 The protective housing 501 and the protective ring 502 are an integral structure, both made of stainless steel, which can significantly improve the overall rigidity and deformation resistance of the protective mechanism 5, making it particularly suitable for high-speed cutting or heavy-duty machining scenarios. At the same time, the stainless steel material has excellent corrosion resistance and wear resistance, which can effectively resist coolant erosion and chip impact, extending the service life of the protective mechanism 5. In addition, the connection gaps of the traditional split structure are eliminated, preventing coolant or chips from seeping into the interior and causing structural failure, further enhancing the sealing and reliability of the protective mechanism and providing a guarantee for high-stability machining.

[0038] The implementation principle of this embodiment is as follows: Several cutting grooves 3 are formed on the outer surface of the end 2 of the end mill body 1 to accommodate chips and assist cutting. The protective mechanism 5 is fixed to the end 2 of the end mill by a threaded connection through a protective sleeve 501. The outer protective ring 502 and the baffle 503 form an annular blocking structure, which is aligned with the opening 702 on the end mill 2 to limit the lateral splashing of coolant. The flow channel 701 at the central axis of the end mill body 1 delivers coolant to the opening 702 and sprays it directly onto the cutting area of ​​the sub-end mill 4. The locking nut ring 6 is connected to the end 2 of the end mill by a thread and presses it in place. The protective sleeve 501 ensures stability, and the end face of the protective ring 502 maintains a height difference with the milling surface of the end mill 2 to avoid interference with the cutting action. The side wall of the cutting groove 3 is bolted with a replaceable secondary milling cutter 4, and the machining taper can be adjusted by replacing the secondary milling cutter 4 with different taper characteristics. The slot 504 on the outside of the protective sleeve 501 is aligned with the cutting groove 3 to form a slag removal channel, which guides the chips and coolant to be discharged in a directional manner. This structure, through the synergistic effect of the mechanical blocking of the protective sleeve 501 and the fluid guiding of the flow channel 701, significantly reduces the risk of coolant splashing while ensuring cooling efficiency.

[0039] Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the present invention and are not intended to limit the invention. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions, and variations to the embodiments as needed without departing from the principles and spirit of the present invention, provided that such modifications, substitutions, and variations are within the scope of the claims of the present invention and are protected by patent law.

Claims

1. A milling cutter with variable taper, characterized in that: It includes a milling cutter body (1), one end of which is provided with a milling cutter end (2), and a protective mechanism (5) is provided on the outside of the milling cutter end (2); The protective mechanism (5) includes a protective sleeve (501), which is threadedly connected to the end of the milling cutter (2). A protective ring (502) is provided on one side of the protective sleeve (501), and a baffle (503) is fixedly provided on one side of the protective ring (502). A plurality of cutting grooves (3) are provided on the outer surface of the end of the milling cutter (2), and a plurality of openings (702) are provided on one side of the cutting grooves (3). The openings (702) are opposite to the baffle (503) and are used to limit the splashing of coolant.

2. The end mill with variable taper according to claim 1, characterized in that: The outer surfaces of the protective sleeve (501) and the protective ring (502) are provided with grooves (504), and the grooves (504) are opposite to the cutting groove (3), serving as slag removal grooves for cutting fluid and cutting slag.

3. The end mill with variable taper according to claim 1, characterized in that: A flow channel (701) is provided at the central axis of the milling cutter body (1), and the flow channel (701) is connected to the opening (702) and the external coolant delivery device.

4. The end mill with variable taper according to claim 1, characterized in that: The outer side of the end of the milling cutter (2) is threaded with a locking nut ring (6), which abuts against the protective sleeve (501).

5. The end mill with variable taper according to claim 1, characterized in that: The end face of the protective ring (502) is not on the same plane as the milling surface of the end of the milling cutter (2), so as to avoid the presence of the protective sleeve (501) and the protective ring (502) affecting the normal operation of the milling cutter body (1).

6. The end mill with variable taper according to claim 1, characterized in that: A secondary milling cutter (4) is detachably mounted on the other side of the cutting groove (3) by bolts. The secondary milling cutter (4) has two, but not limited to, two taper feature forms.

7. The end mill with variable taper according to claim 1, characterized in that: The protective shell (501) and the protective ring (502) are an integral structure, and both are made of stainless steel.

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