Inner whirlwind facing cutter and manufacturing method of milling blades thereof

Abstract

The invention provides an inner whirlwind facing cutter and a manufacturing method of milling blades thereof, the inner whirlwind facing cutter comprises a fixed seat, a cutter body is detachably mounted on the fixed seat, a first machining hole for a workpiece to pass through is formed in a central shaft of the fixed seat, and a second machining hole is formed in the cutter body; a plurality of blade grooves used for installing the milling blades are formed in the disc body in the circumferential direction of the second machining hole, the milling blades are fixed in the blade grooves through fixing bolts, the side walls of the blade grooves communicate with pressing grooves, pressing assemblies used for pressing the milling blades are arranged in the pressing grooves, and adjusting bolts are eccentrically arranged at the bottoms of the blade grooves. An adjusting hole matched with the adjusting bolt is formed in the fixed seat, the adjusting bolt penetrates through the fixed seat and is in threaded connection with the disc body through the adjusting hole, and the eccentric direction of the adjusting bolt is consistent with the radial adjusting direction of the milling blade. Through the eccentric structure of the adjusting bolt, quantitative control over radial displacement of the milling cutter blade is achieved, the adjusting precision is high, meanwhile, the milling cutter blade is pressed by the pressing assembly, replacement of the milling cutter blades of various specifications is achieved, and the applicability is wide.

Description

Technical Field

[0001] The invention relates to the technical field of cutting tools, and in particular to a method for manufacturing an inner cyclone milling cutter disc and a milling blade thereof. Background Art

[0002] The cutting process is mainly divided into turning, drilling, milling, boring and grinding according to the processing type; turning refers to the use of the rotation of the workpiece and the linear or curved motion of the tool to change the shape and size of the blank; drilling refers to the process of using the tool to process holes on the workpiece; milling refers to fixing the blank and using a rotating multi-edged tool to cut the workpiece into the required shape and size; boring is a cutting process that uses a tool to enlarge the hole or other circular contour; grinding refers to the processing method of using abrasives to remove excess material on the workpiece, which belongs to the finishing of mechanical processing; threaded connection is a widely used detachable fixed connection with the advantages of simple structure, reliable connection, and easy assembly and disassembly. Thread refers to a continuous raised part with a spiral shape and a specific cross-section made on the surface of a cylindrical or conical mother body. Threads are divided into cylindrical threads and conical threads according to their mother body shape; they are divided into external threads and internal threads according to their position in the mother body, and they are divided into triangular threads, rectangular threads, trapezoidal threads, serrated threads and other special shapes according to their cross-sectional shape (tooth shape). Traditional thread processing is mainly achieved by die, rolling, thread milling, turning, etc., while external threads and screws are often processed by turning and rolling. Currently, some large-diameter external threads and studs are generally processed by whirlwind milling cutters.

[0003] The existing invention patent CN109365893A discloses a cyclone milling cutter with a self-cooling and lubrication structure, which includes a rotating base and multiple thread milling blades; a large through hole is arranged on the rotating base along the central axis; a plurality of base connecting screw holes are arranged on the rotating base along the circumferential direction; a plurality of thread milling blades are installed along the circumferential direction on one end face of the rotating base; it also includes a plurality of cooling lubricating liquid flow channels arranged in the rotating base and the same number as the thread milling blades; the inlet of the cooling lubricating liquid flow channel is located on the outer circular surface of the rotating base and is away from the thread milling blade; the outlet of the cooling lubricating liquid flow channel is arranged on the inner circular surface of the rotating base and is close to the thread milling blade; the outlet of a cooling lubricating liquid flow channel is directly opposite to the tip of a thread milling blade; the rotating base and the cooling lubricating liquid flow channel are both processed and formed by 3D printing.

[0004] However, the position of the blade in the disclosed structure cannot be fine-tuned, resulting in errors between multiple edges when the cutter disc is manufactured and the blade itself also has precision deviations, resulting in differences in blade height in the radial and axial dimensions of the cutting edge after the blade is assembled on the cutter disc, resulting in joint marks on the processed part of the product. Summary of the invention

[0005] The present invention aims to provide a method for manufacturing a high-precision, high-quality internal whirlwind milling cutter disc and a milling blade thereof.

[0006] The present invention provides the following technical solutions: an internal cyclone milling cutter disc, comprising a fixed seat, on which a disc body is detachably mounted, a first machining hole for a workpiece to pass through is provided at the central axis of the fixed seat, a second machining hole coaxially arranged with the first machining hole is provided on the disc body, a plurality of blade grooves for installing milling blades are opened on the disc body along the circumferential direction of the second machining hole, the milling blades are fixed in the blade grooves by fixing bolts, a clamping groove is connected to the side wall of the blade groove, a clamping assembly for clamping the milling blades is provided in the clamping groove, an adjusting bolt is eccentrically provided at the bottom of the blade groove, an adjusting hole cooperating with the adjusting bolt is provided on the fixed seat, the adjusting bolt passes through the fixed seat and is threadedly connected to the disc body through the adjusting hole, and the eccentric direction of the adjusting bolt is consistent with the radial adjustment direction of the milling blade.

[0007] In some embodiments, the radial adjustment amount Δr of the adjusting bolt satisfies the formula: Δr = (P × e) / R, where: Δr is the radial displacement generated by a single rotation of the adjusting bolt; P is the axial movement distance of one rotation of the adjusting bolt; e is the eccentricity between the axis of the adjusting bolt and the contact surface; R is the effective radius of the adjusting bolt; the ratio of the eccentricity e to the axial movement distance P ranges from 1:5 to 1:8.

[0008] In some embodiments, the clamping assembly includes a clamping block, which moves along a radial adjustment direction perpendicular to the milling blade. The clamping block is provided with a movable oblong hole along its moving direction. A clamping bolt is installed on the movable oblong hole, and the clamping bolt is threadedly connected to the fixing seat.

[0009] In some embodiments, a long positioning groove is provided in the blade slot, and the length direction of the long positioning groove is perpendicular to the radial adjustment direction of the milling blade. The long positioning groove includes an extension portion and a movable portion. A positioning nut is movably provided in the movable portion. The positioning nut has a boss extending outward in the circumferential direction, and a pressure plate extends inward in the movable portion. The pressure plate is located directly above the pressure plate. The positioning nut cooperates with a fixing bolt, and the fixing bolt passes through the milling blade and is threadedly connected to the positioning nut.

[0010] In some embodiments, a limit bolt is installed in the extending portion.

[0011] In some embodiments, a clamping bolt is provided at the bottom of the clamping block, and a clamping threaded through hole matching the clamping bolt is provided on the disk body. By rotating the clamping bolt, the clamping bolt is pressed against the wall of the milling blade, thereby clamping the milling blade.

[0012] In some embodiments, by adjusting the radial extension distance of the milling blade, the blade slot is divided into a rough milling slot and a fine milling slot, and the rough milling slot and the fine milling slot are arranged in a staggered manner.

[0013] In some embodiments, a first positioning hole is provided on the disk body, and a second positioning hole matching the first positioning hole is provided on the fixing seat. The first positioning hole and the second positioning hole are connected by a positioning pin. The first positioning holes are distributed along the radial extension of the disk body, and the first positioning holes in the same radial direction are a group, and several groups of first positioning holes are evenly distributed circumferentially around the central axis of the disk body.

[0014] A method for manufacturing an internal cyclone milling cutter disc milling blade, the manufacturing process of the milling blade is as follows: S1, preparation of a gradient cemented carbide substrate: loading a surface mixed powder and a core mixed powder into a mold in layers, and forming a cemented carbide substrate with low cobalt on the surface and high cobalt on the core by a gradient sintering process, wherein the surface mixed powder contains ≤6wt% cobalt and a grain inhibitor, and the core mixed powder contains 8-12wt% cobalt; S2: Cutting edge shaping and strengthening: five-axis grinding is performed on the substrate to form an involute cutting edge that matches the helix angle of the worm, and laser micro-melting strengthening treatment is performed on the cutting edge area to generate a nanocrystalline strengthening layer; S3: Multilayer composite coating deposition, using physical vapor deposition technology to sequentially deposit a transition layer, a heat insulation layer and a friction-reducing layer containing silicon elements on the surface of the substrate; S4: Functional verification, verifying tool life and machining accuracy through worm cutting test.

[0015] Compared with the prior art, the advantages of the present invention are: 1. Innovation of high-precision radial adjustment mechanism: The milling cutter is fixed by fixing bolts, and the adjusting bolts directly contact the milling cutter for minor adjustments, making the adjustment more precise. At the same time, the eccentric adjustment is controlled by formulas. Compared with the traditional cutter head that relies on manual experience for adjustment, this design uses the lever amplification effect to achieve micron-level adjustment, and the adjustment accuracy is improved by more than 50%.

[0016] 2. The double composite clamping mechanism strengthens the tool fixation. The vertical clamping is combined with the lateral clamping. The clamping assembly is initially fixed by moving the clamping block in the vertical direction, and then pressure is applied to the side wall of the milling cutter through the clamping bolt to form a bidirectional clamping force. The contact area is increased by 40% compared with the traditional single-bolt clamping method, and the vibration resistance is significantly improved.

[0017] 3. The integrated slot design for roughing and finishing, the insert slots are divided into roughing slots and finishing slots, which are arranged alternately. During roughing, high-toughness inserts are responsible for large cutting volume, and during finishing, high-precision inserts complete surface finishing. The cutting force fluctuation is reduced by more than 30%. By adjusting the radial extension distance of the insert in the roughing or finishing slots, the roughing and finishing modes can be switched without changing the cutter disc, reducing downtime by 50%.

[0018] 4. Breakthroughs in gradient material and composite coating technology: low cobalt on the surface improves wear resistance, high cobalt in the core enhances impact resistance, and the tool life is more than twice that of homogeneous carbide tools. Laser treatment is used to generate a nanocrystalline strengthening layer in the cutting edge area. Combined with the TiN / Al2O3 / TiSiN composite coating, the cutting temperature is reduced by 20% and the incidence of built-up edge is reduced by 80%. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0020] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 It is a structural schematic diagram of another angle of the present invention; Figure 3 For the present invention Figure 2 A schematic diagram of the enlarged structure at point A; Figure 4 It is a cross-sectional structural schematic diagram of the present invention; Figure 5 It is a schematic diagram of the cross-sectional structure of the present invention from another angle; Figure 6 It is a schematic diagram of the explosion structure of the present invention; Figure 7 It is a structural schematic diagram of the disk body of the present invention; Figure 8 It is a structural schematic diagram of the fixing seat of the present invention; Fig. 9 It is a structural schematic diagram of the coordination of the fixed mark and the adjustable mark of the present invention; Fig.10 It is a schematic structural diagram of the milling insert of the present invention; Fig.11 It is a schematic diagram of the manufacturing process of the milling cutter blade of the present invention.

[0021] In the figure: 1. fixed seat; 1.1. first processing hole; 1.2. adjustment hole; 1.3. second positioning hole; 1.4. positioning long slot; 1.4.1. insertion part; 1.4.2. moving part; 1.4.3. pressing plate; 2. plate body; 2.1. second processing hole; 2.2. blade slot; 2.2.1. rough milling slot; 2.2.2. fine milling slot; 2.2.3. adjustment scale line; 2.2.4. positioning surface; 2.3 , clamping groove; 2.4, clamping bolt through hole; 2.5, first positioning hole; 2.6, fixing mark; 3, clamping assembly; 3.1, clamping block; 3.2, movable oblong hole; 3.3, clamping bolt; 3.4, clamping bolt; 4, adjusting bolt; 4.1, adjusting mark; 5, milling blade; 5.1, fixing hole; 6, fixing bolt; 7, positioning pin; 8, positioning nut; 8.1, boss; 9, limit bolt. DETAILED DESCRIPTION

[0022] The present application is described in detail below with reference to the accompanying drawings and specific embodiments.

[0023] The following describes the implementation methods of the present application through specific specific examples, and those skilled in the art can easily understand other advantages and effects of the present application from the content disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The present application can also be implemented or applied through other different specific implementation methods, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present application. It should be noted that, in the absence of conflict, the following embodiments and the features in the embodiments can be combined with each other. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without making creative work belong to the scope of protection of the present application.

[0024] It should be noted that various aspects of the embodiments within the scope of the appended claims are described below. It should be apparent that the aspects described herein can be embodied in a wide variety of forms, and any specific structure and / or function described herein is merely illustrative. Based on the present application, it should be understood by those skilled in the art that an aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number and aspect described herein can be used to implement the device and / or practice the method. In addition, other structures and / or functionalities other than one or more of the aspects described herein can be used to implement this device and / or practice this method.

[0025] It should also be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present application. The illustrations only show the components related to the present application rather than being drawn according to the number, shape and size of the components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed at will, and the component layout may also be more complicated.

[0026] Additionally, in the following description, specific details are provided to facilitate a thorough understanding of the examples. However, it will be understood by those skilled in the art that the examples can be practiced without these specific details.

[0027] The technical solutions provided by various embodiments of the present application are described below in conjunction with the accompanying drawings.

[0028] See also Figure 1-6 As shown in the present embodiment: an internal cyclone milling cutter disc comprises a fixed seat 1, on which a disc body 2 is detachably mounted, a first machining hole 1.1 for a workpiece to pass through is provided at the central axis of the fixed seat 1, a second machining hole 2.1 coaxially arranged with the first machining hole 1.1 is provided on the disc body 2, a plurality of blade grooves 2.2 for mounting a milling blade 5 are provided on the disc body 2 along the circumferential direction of the second machining hole 2.1, the milling blade 5 is fixed in the blade groove 2.2 by a fixing bolt 6, a clamping groove 2.3 is connected to the side wall of the blade groove 2.2, a clamping assembly 3 for clamping the milling blade 5 is provided in the clamping groove 2.3, an adjusting bolt 4 is eccentrically arranged at the bottom of the blade groove 2.2, an adjusting hole 1.2 cooperating with the adjusting bolt 4 is provided on the fixed seat 1, the adjusting bolt 4 passes through the fixed seat 1 and is threadedly connected to the disc body 2 through the adjusting hole 1.2, and the eccentric direction of the adjusting bolt 4 is consistent with the radial adjustment direction of the milling blade 5.

[0029] It should be pointed out that the cutter disc adopts a structure in which the fixed seat 1 and the disc body 2 are separated, and rapid positioning and installation are achieved through the positioning pin 7. This design facilitates the maintenance of the cutter disc and the replacement of the tool, meets the needs of modern efficient processing, and realizes a modular and detachable design.

[0030] In some embodiments, Figure 4-Figure 6 As shown, the radial adjustment amount Δr of the adjusting bolt 4 satisfies the formula: Δr = (P × e) / R, where: Δr is the radial displacement generated by a single rotation of the adjusting bolt 4; P is the axial movement distance of the adjusting bolt 4 rotating one circle; e is the eccentricity between the axis of the adjusting bolt 4 and the contact surface; R is the effective radius of the adjusting bolt 4; the ratio of the eccentricity e to the axial movement distance P ranges from 1:5 to 1:8.

[0031] It should be pointed out that: when e:P=1:5, then e=0.05mm, lead P=0.2mm, Δr=0.004mm, R=2.5mm, and the adjusting bolt 4 can realize radial adjustment of the milling cutter 50.004mm for every rotation of the adjusting bolt 4, and can realize radial adjustment of the milling cutter 50.001mm for a quarter of a turn of the milling cutter 5. The adjusting thread adopts fine pitch thread M3×0.2, and the pitch accuracy must reach ISO:4 level.

[0032] In some embodiments, Figure 6-Figure 10 As shown, the fixing bolt 6 passes through the fixing hole 5 . 1 of the milling cutter 5 to fix the milling cutter 5 on the fixing seat 1 .

[0033] In some embodiments, Figure 2-Figure 8 As shown, the clamping assembly 3 includes a clamping block 3.1, which moves along a radial adjustment direction perpendicular to the milling cutter blade 5. The clamping block 3.1 is provided with a movable oblong hole 3.2 along its moving direction, and a clamping bolt 3.3 is mounted on the movable oblong hole 3.2. The clamping bolt 3.3 is threadedly connected to the fixing seat 1. It should be noted that the clamping block 3.1 realizes elastic pre-tightening in the vertical direction through the movable oblong hole 3.2 to avoid tool movement during high-speed cutting. At the same time, the movement of the clamping block 3.1 can adapt to the assembly of milling cutters 5 of different specifications.

[0034] In some embodiments, Figure 2-Figure 3 As shown, a positioning long groove 1.4 is provided in the blade slot 2.2, and the length direction of the positioning long groove 1.4 is perpendicular to the radial adjustment direction of the milling blade 5. The positioning long groove 1.4 includes an insertion portion 1.4.1 and a moving portion 1.4.2. A positioning nut 8 is movably provided in the moving portion 1.4.2. The positioning nut 8 has a boss 8.1 extending outward in the circumferential direction. A pressing plate 1.4.3 is extended inwardly from the moving portion 1.4.2. The pressing plate 1.4.3 is located directly above the pressing plate 1.4.3. The positioning nut 8 cooperates with the fixing bolt 6 to fix The fixed bolt 6 passes through the milling blade 5 and is threadedly connected with the positioning nut 8. It should be noted that the milling blade 5 is fixed to the positioning nut 8 by the fixing bolt 6. Since the positioning nut 8 can only move perpendicular to the radial adjustment direction of the milling blade 5, the milling blade 5 is further limited to provide the installation accuracy of the milling blade 5. At the same time, the wall distance of the blade groove 2.2 can be adjusted by the positioning nut 8 to realize the installation of milling blades 5 of various specifications. The pressure plate 1.4.3 cooperates with the boss 8.1 to prevent the positioning nut 8 from detaching from the positioning long groove 1.4.

[0035] In some embodiments, Figure 3As shown, a limiting bolt 9 is installed in the insertion part 1.4.1. It should be noted that the positioning nut 8 is moved to the movable part 1.4.2 through the insertion part 1.4.1, and the boss 8.1 of the positioning nut 8 is moved directly under the pressure plate 1.4.3, and a limiting bolt 9 is provided in the insertion part 1.4.1 to prevent the positioning nut 8 from being separated from the positioning long groove 1.4 during the assembly of the milling cutter 5.

[0036] In some embodiments, Fig. 9 As shown, an adjustment mark 4.1 is provided on the upper end face of the adjusting bolt 4, a fixed mark 2.6 cooperating with the adjustment mark is provided on the disc body 2, and an adjustment scale line 2.2.3 is provided at the installation position of the adjusting bolt 4 of the blade slot 2.2, which can intuitively and accurately adjust the radial distance of the milling blade 5.

[0037] In some embodiments, Figure 5 As shown, a clamping bolt 3.4 is provided at the bottom of the clamping block 3.1, and a clamping threaded through hole cooperating with the clamping bolt 3.4 is provided on the disk body 2. By rotating the clamping bolt 3.4, the clamping bolt 3.4 is pressed against the wall of the milling blade 5, thereby clamping the milling blade 5. It should be noted that the clamping bolt 3.4 directly acts on the side of the blade to form a rigid support, and cooperates with the clamping bolt 3.3 and the fixing bolt 6 to achieve triple fixation to ensure safety.

[0038] In some embodiments, Figure 3 As shown, the blade groove 2.2 includes a positioning surface 2.2.4. When installing the milling blade 5, the fixing bolt 6 passes through the fixing hole 5.1 of the milling blade 5 and is pre-connected with the positioning nut 8, and the milling blade 5 is pressed on the positioning surface 2.2.4 by the clamping block 3.1 and the clamping bolt 3.4, and the connection between the fixing bolt 6 and the positioning nut 8 is pre-tightened again, the radial distance of the milling blade 5 is measured, and the adjusting bolt 4 is adjusted until the milling blade 5 reaches the precise position, the fixing bolt 6 is tightened, and the radial distance of the milling blade 5 is measured again until the milling blade 5 reaches the precise position.

[0039] In some embodiments, Figure 7 As shown, by adjusting the radial extension distance of the milling blade 5, the blade slot 2.2 is divided into a rough milling slot 2.2.1 and a fine milling slot 2.2.2, and the rough milling slot 2.2.1 and the fine milling slot 2.2.2 are arranged in a staggered manner. The rough milling slot 2.2.1 and the fine milling slot 2.2.2 are staggered to achieve the integration of rough machining to remove the allowance and fine machining to ensure accuracy, and the rough and fine machining efficiency is improved by 10 times.

[0040] In some embodiments, Figure 6-Figure 8As shown, the disc body 2 is provided with a first positioning hole 2.5, and the fixing seat 1 is provided with a second positioning hole 1.3 that matches the first positioning hole 2.5. The first positioning hole 2.5 and the second positioning hole 1.3 are connected by a positioning pin 7. The first positioning holes 2.5 are distributed along the radial direction of the disc body 2, and the first positioning holes 2.5 in the same radial direction are a group. Several groups of first positioning holes 2.5 are evenly distributed circumferentially around the central axis of the disc body 2, so that the positioning of the disc body 2 and the fixing seat 1 is more accurate to prevent their relative movement during operation.

[0041] A method for manufacturing an inner cyclone milling cutter disc milling blade, such as Fig.11 As shown, the manufacturing process of the milling insert 5 is as follows: S1, preparation of gradient cemented carbide substrate, powder mixing, surface material: WC powder particle size 0.6μm, 94.3wt%, Co powder 5.5wt%, Cr3C2 powder 0.2wt%; core material: WC powder 88wt%, Co powder 12wt%; The two types of powder were placed in a planetary ball mill respectively, with alcohol as the medium and a ball-to-material ratio of 5:1. After mixing for 6 hours, they were dried and sieved with a mesh size of 45μm. A laminating mold was used to load the surface powder with a thickness of 1mm and the core powder with a thickness of 4mm in sequence. A pressure of 25MPa was applied in a vacuum sintering furnace, and the temperature was raised to 1470°C at 10°C / min, kept warm for 1.5 hours, and then cooled to room temperature at 5°C / min. The hardness of the substrate was obtained: surface HRA 93.2, core HRA 91.8, and flexural strength 2650MPa.

[0042] S2. Involute cutting edge processing and strengthening, five-axis grinding, use diamond grinding wheel with grit size D15 to process the cutting edge, grinding wheel linear speed 35m / s, feed rate 0.02mm / time; main cutting edge helix angle β = 15.5°, secondary cutting edge back angle α = 8.2°, cutting edge passivation radius R0.04mm, surface roughness Ra = 0.18μm; laser micro-melting strengthening, using fiber laser, wavelength 1070nm, power 350W, spot diameter 0.1mm, scanning speed 900mm / s; scan along the cutting edge contour 3 times, forming a strengthening layer with a thickness of 0.25mm, surface residual compressive stress 820MPa, microhardness HV0.3 = 2850.

[0043] S3, multilayer composite coating deposition, pretreatment, substrate after ultrasonic cleaning, etching in argon plasma for 10 minutes, bias -1000V, current 2A; coating deposition, TiCN transition layer: target: Ti target (purity 99.99%), reaction gas C2H2 / N2=1:3, pressure 3Pa, bias voltage -150V, deposition temperature 450°C, thickness 2.5μm; Al2O3 thermal insulation layer: target: Al target, reaction gas O2 / Ar=1:2, pressure 0.5Pa, RF power 8kW, deposition temperature 500°C, thickness 3.8μm; TiSiN anti-friction layer: target: Ti target + Si target (Ti:Si=4:1), reaction gas N2, pressure 0.3Pa, DC power Ti target 4kW / Si target 1kW, deposition temperature 400°C, thickness 5.1μm; The total coating thickness is 10.5 μm, the surface friction coefficient is 0.28, and the test standard is ASTM G99.

[0044] S4: Cutting Verification Workpiece material: 20CrMnTi carburized and hardened steel (HRC 58-60), worm module m=4, helix angle 20°; cutting parameters: linear speed 135m / min, feed rate 0.2mm / r, cutting depth 0.5mm.

[0045] The advantages of this manufacturing method are: Enhanced chipping resistance: The gradient carbide substrate (low cobalt on the surface + high cobalt in the core) increases the impact strength of the cutting edge by more than 40%, and the chipping rate is reduced to 1 / 3 of that of traditional tools; Extended coating life: The heat resistance of the TiCN / Al2O3 / TiSiN composite coating system reaches 1200°C, and the tool life is increased to 200-250 minutes (traditional tools ≤ 80 minutes); Optimized cutting edge stability: Laser micro-melting strengthening process makes the deformation of the cutting edge ≤0.005mm at high temperature, and the continuous processing worm tooth profile error ≤0.02mm; Involute blade matching: The geometric fit between the bidirectional involute cutting edge and the worm helix angle is greater than 95%, and the tooth surface roughness Ra≤0.8μm (ISO grade 5 standard); Anti-friction coating effect: The friction coefficient of TiSiN layer is ≤0.3, which reduces the cutting force by 15-20% and avoids scratches on the worm surface; Dynamic thermal control: Al2O3 insulation reduces heat transfer to the cutter body by 60%, keeping the substrate temperature stable below 400°C.

[0046] The same and similar parts between the various embodiments in this specification can be referenced to each other, and each embodiment focuses on the differences from other embodiments.

[0047] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. An internal cyclone milling cutter disc, comprising a fixing seat (1), characterized in that: A disc body (2) is detachably mounted on the fixing seat (1); a first machining hole (1.1) for a workpiece to pass through is provided at the central axis of the fixing seat (1); a second machining hole (2.1) coaxially arranged with the first machining hole (1.1) is provided on the disc body (2); a plurality of blade grooves (2.2) for mounting a milling blade (5) are provided on the disc body (2) along the circumferential direction of the second machining hole (2.1); the milling blade (5) is fixed in the blade groove (2.2) by a fixing bolt (6); The side wall is connected with a clamping groove (2.3), and a clamping assembly (3) for clamping the milling blade (5) is arranged in the clamping groove (2.3). An adjusting bolt (4) is eccentrically arranged at the bottom of the blade groove (2.2), and an adjusting hole (1.2) cooperating with the adjusting bolt (4) is arranged on the fixing seat (1). The adjusting bolt (4) passes through the fixing seat (1) and is threadedly connected to the disc body (2) through the adjusting hole (1.2). The eccentric direction of the adjusting bolt (4) is consistent with the radial adjustment direction of the milling blade (5).

2. The inner cyclone milling cutter disc according to claim 1, characterized in that: The radial adjustment amount Δr of the adjusting bolt (4) satisfies the formula: Δr = (P × e) / R, wherein: Δr is the radial displacement generated by a single rotation of the adjusting bolt (4); P is the axial movement distance of the adjusting bolt (4) after one rotation; e is the eccentricity between the axis of the adjusting bolt (4) and the axis of the adjusting hole (1.2); R is the effective radius of the adjusting bolt (4); and the ratio of the eccentricity e to the axial movement distance P is in the range of 1:5 to 1:

8.

3. The inner cyclone milling cutter disc according to claim 1, characterized in that: The clamping assembly (3) comprises a clamping block (3.1), the clamping block (3.1) moves along a radial adjustment direction perpendicular to the milling blade (5), the clamping block (3.1) is provided with a movable oblong hole (3.2) along its moving direction, a clamping bolt (3.3) is fitted on the movable oblong hole (3.2), and the clamping bolt (3.3) is threadedly connected to the fixing seat (1).

4. The inner whirlwind milling cutter disc according to claim 3, characterized in that: A positioning long groove (1.4) is provided in the blade slot (2.2), the length direction of the positioning long groove (1.4) is perpendicular to the radial adjustment direction of the milling blade (5), the positioning long groove (1.4) comprises an extending portion (1.4.1) and a movable portion (1.4.2), a positioning nut (8) is movably provided in the movable portion (1.4.2), the positioning nut (8) is provided with a boss (8.1) extending outwardly in the circumferential direction, the movable portion (1.4.2) is provided with a pressure plate (1.4.3) extending inwardly, the pressure plate (1.4.3) is located directly above the pressure plate (1.4.3), the positioning nut (8) cooperates with the fixing bolt (6), and the fixing bolt (6) passes through the milling blade (5) and is threadedly connected to the positioning nut (8).

5. The inner whirlwind milling cutter disc according to claim 4, characterized in that: A limiting bolt (9) is installed in the extending portion (1.4.1).

6. The inner whirlwind milling cutter disc according to claim 3, characterized in that: The bottom of the clamping block (3.1) is provided with a clamping bolt (3.4), and the disc body (2) is provided with a clamping threaded through hole that cooperates with the clamping bolt (3.4). By rotating the clamping bolt (3.4), the clamping bolt (3.4) is pressed against the wall surface of the milling blade (5), thereby clamping the milling blade (5).

7. The inner whirlwind milling cutter disc according to claim 1, characterized in that: By adjusting the radial extension distance of the milling blade (5), the blade slot (2.2) is divided into a rough milling slot (2.2.1) and a fine milling slot (2.2.2), and the rough milling slot (2.2.1) and the fine milling slot (2.2.2) are arranged in a staggered manner.

8. The inner whirlwind milling cutter disc according to claim 1, characterized in that: The disk body (2) is provided with a first positioning hole (2.5), the fixing seat (1) is provided with a second positioning hole (1.3) matched with the first positioning hole (2.5), the first positioning hole (2.5) and the second positioning hole (1.3) are connected via a positioning pin (7), the first positioning holes (2.5) are distributed along the radial direction of the disk body (2), and the first positioning holes (2.5) in the same radial direction form a group, and a plurality of groups of the first positioning holes (2.5) are evenly distributed circumferentially around the central axis of the disk body (2).

9. A method for manufacturing a milling blade of an internal whirlwind milling cutter disc, using an internal whirlwind milling cutter disc as claimed in any one of claims 1 to 8, characterized in that: The manufacturing process of the milling blade (5) is as follows: S1. Preparation of gradient cemented carbide substrate: loading the surface mixed powder and the core mixed powder into a mold in layers, and forming a cemented carbide substrate with low cobalt on the surface and high cobalt on the core by a gradient sintering process, wherein the surface mixed powder contains ≤6wt% cobalt and a grain inhibitor, and the core mixed powder contains 8-12wt% cobalt; S2: Cutting edge shaping and strengthening: five-axis grinding is performed on the substrate to form an involute cutting edge that matches the helix angle of the worm, and laser micro-melting strengthening treatment is performed on the cutting edge area to generate a nanocrystalline strengthening layer; S3: Multilayer composite coating deposition, using physical vapor deposition technology to sequentially deposit a transition layer, a heat insulation layer and a friction-reducing layer containing silicon elements on the surface of the substrate; S4: Functional verification, verifying tool life and machining accuracy through worm cutting test.

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