Automatic welding equipment for milling cutter

Abstract

The invention relates to the technical field of metal welding, and discloses milling cutter automatic welding equipment which comprises a base and a rotatable workbench installed on the base, a plurality of sets of clamping discs which can independently rotate and are used for fixing to-be-welded cutter bodies are evenly arranged on the workbench in the circumferential direction, and a material disc provided with the cutter bodies is arranged on the base. The base is further fixedly provided with a feeding robot. An alloy feeding robot is fixedly arranged on the base, a gluing structure is arranged between the vibration disc and the alloy feeding robot, and a welding device for welding a cutter alloy and a cutter body is further fixedly installed on the base; a multi-station parallel machining system is constructed, the workbench rotates to drive the clamping disc to continuously flow between the alloy conveying robots and the feeding robots, synchronous installation of the cutter body and the cutter alloy is completed, the cutter body assembling time is remarkably shortened, unmanned and high-precision continuous production of the whole cutter welding process is achieved, and the production efficiency is improved. And the production cost is greatly reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of metal welding, and specifically to an automatic milling cutter welding device. Background Art

[0002] As a key tool in the field of high-speed cutting machining, the highly reliable welding of the cutter body and the cemented carbide cutting head is the core link to ensure the comprehensive performance of the cutting tool. Existing welding equipment usually adopts high-frequency induction heating or flame brazing technology to achieve the metallurgical bonding between the cutter body and the cemented carbide through the melting of the solder. In recent years, new cutting tool materials represented by low-cobalt ultra-fine particle cemented carbide (cobalt content 3 - 4.5 wt%, WC grain size 0.4 - 0.6 μm) have gradually replaced traditional cemented carbide materials in ultra-high-speed cutting scenarios in fields such as aerospace and precision molds due to their high hardness (HV30≥1900), high strength (flexural strength≥2900 MPa), and excellent wear resistance.

[0003] However, the reduction of the cobalt content in this material significantly increases the brittleness sensitivity while improving the hardness. Especially during the welding process, microcrack defects are easily induced due to heat stress concentration, directly affecting the structural integrity and service life of the cutting tool. During the welding process of cemented carbide cutting tools and medium-carbon steel cutter bodies, the significant differences in their physical properties further exacerbate the process complexity. For example, the difference in the thermal expansion coefficients between cemented carbide and medium-carbon steel exceeds 40%, and the thermal conductivity differs by nearly 3 times, resulting in non-uniform deformation at the welding interface during the heating and cooling stages. Traditional welding methods (such as high-frequency brazing and flame welding) are limited by insufficient precision in controlling heat input and weak stress regulation capabilities, making it difficult to avoid defects such as porosity and lack of fusion in the joint area, severely restricting the dynamic load-bearing capacity of the cutting tool during high-speed cutting. In addition, the existing welding process highly relies on manual experience to complete alignment, feeding, and temperature monitoring, not only with low efficiency but also difficult to guarantee the quality consistency. The welding qualification rate of cutting tools in the same batch fluctuates in the range of 20% - 30%, unable to meet the stable supply demand for a large number of high-precision cutting tools in industries such as automotive parts and mold manufacturing. Summary of the Invention

[0004] (1) Technical problems to be solved: Aiming at the deficiencies of the prior art, the present invention provides an automatic milling cutter welding device, which has the advantages of multi-station automatic welding and good welding effect, and solves the problems of high dependence on manual labor and poor welding effect in traditional welding.

[0005] (2) Technical solution: To achieve the above object of multi-station automatic welding with good welding effect, the present invention provides the following technical solution: An automatic milling cutter welding device includes a base and a rotatable workbench installed on the base. The workbench is evenly provided with multiple groups of clamping disks that can rotate independently and are used to fix the cutter body to be welded along the circumferential direction. A material tray containing the cutter body is arranged on the base. The base is also fixedly installed with a loading robot that clamps the cutter body from the material tray and assembles it to the clamping disk; A vibrating disk containing tool alloy is fixedly arranged on the base, and a robot for delivering the tool alloy to the clamping disk is provided. A glue application structure for coating welding flux on the welding area of the tool alloy is arranged between the vibrating disk and the robot for delivering the tool alloy. A welding device for welding the tool alloy and the cutter body is also fixedly installed on the base; When the clamping disk carrying the cutter body rotates with the workbench to the position of the robot for delivering the tool alloy, the tool alloy is positioned in the welding area; Subsequently, the workbench continues to rotate to move the clamping disk to the welding device station for welding.

[0006] Preferably, the welding device includes a lifting motor and an extrusion motor. The lifting motor is fixedly installed on the base, and the extrusion motor is fixedly installed on the driving end of the lifting motor. A welding table is also fixedly installed on the driving end of the lifting motor. Two or more lead-out pipes connected to the extrusion motor by silver wires are arranged along the circumferential direction of the welding table. A high-frequency welding ring is coaxially arranged on the welding table. The high-frequency welding ring is slidably connected to the driving end of the lifting motor.

[0007] Preferably, the glue application structure includes a glue delivery pipe and a glue application pipe. The glue delivery pipe is fixedly installed on the base. There are two or more glue delivery pipes. The glue application pipe is communicated with the glue delivery pipe. Two or more glue application pipes respectively coat welding flux on different welding surfaces of the tool alloy.

[0008] Preferably, two or more magnetic rods for pressing the tool alloy onto the cutter body are also assembled on the clamping disk. Two or more magnetic rods are arranged at equal intervals along the circumferential direction of the clamping disk.

[0009] Preferably, an electromagnetic control ring is also coaxially arranged on the welding table. The electromagnetic control ring is slidably connected to the driving end of the lifting motor. The electromagnetic control ring includes an annular electromagnetic coil and an annular permanent magnet array. The magnetic field axis of the electromagnetic control ring is orthogonal to the direction of the eddy current field generated by the high-frequency welding ring.

[0010] Preferably, the diameter of the electromagnetic control ring is larger than that of the high-frequency welding ring; and the electromagnetic control ring can be arranged above or below the high-frequency welding ring.

[0011] Preferably, a sliding module for controlling the axial movement of the electromagnetic regulation ring and the high-frequency welding ring is fixedly installed on the welding table.

[0012] Preferably, two or more guiding rods for controlling the welding position of the lead-out pipe are equidistantly arranged along the circumferential direction of the welding table. The lead-out pipe is installed on the guiding rods, and the guiding rods control the lead-out pipe to be welded at the flux coating application position between the tool alloy and the tool body.

[0013] Preferably, a detection device for detecting the installation positions of the tool alloy and the tool body is fixedly installed on the base.

[0014] (III) Beneficial effects: Compared with the prior art, the present invention provides a milling cutter automatic welding device, which has the following beneficial effects: 1. For this milling cutter automatic welding device, through the combined use of the workbench structure and the clamping disk structure, a multi-station parallel processing system is constructed. The workbench rotation drives the clamping disk to continuously flow between multiple alloy feeding robots and the loading robot, completing the synchronous installation of the multi-edge tool body and the tool alloy, significantly shortening the tool body assembly time. At the same time, during the welding stage, through the linkage control of the high-frequency welding ring and the extrusion motor, the gradient temperature field regulation of the silver wire melting filling is realized, ensuring the weld filling uniformity and strength. The whole device through multi-station parallel operation and robot collaborative operation significantly shortens the single-piece processing cycle, improves the welding quality of complex tools, solves the positioning deviation caused by manual intervention in the traditional process, realizes the unmanned and high-precision continuous production of the whole tool welding process, and greatly reduces the production cost.

[0015] 2. For this milling cutter automatic welding device, through the combined use of the high-frequency welding ring structure and the electromagnetic regulation ring structure, a dynamically controllable gradient magnetic field distribution is formed in the welding area. The auxiliary magnetic field generated by the electromagnetic regulation ring is orthogonally superimposed with the high-frequency eddy current field, forcing the eddy current electrons to gather along the axial path of the silver wire, forming a magnetic field funnel effect, significantly enhancing the energy density of the core welding area. At the same time, the reverse magnetic field component of the electromagnetic regulation ring effectively cancels the eddy current intensity in the edge area, and combined with the distance feedback adjustment of the sliding module, it suppresses the risk of transverse heat diffusion and edge overheating. By real-time optimizing the current parameters and distance, the thermal field is adaptively corrected to ensure the thermodynamic stability of the silver wire melting phase change process, eliminating the grain coarsening and interface oxidation defects in the heat-affected zone of the tool substrate, and greatly enhancing the weld bonding strength and welding efficiency. Description of the drawings

[0016] Figure 1 It is a three-dimensional structure schematic diagram of the milling cutter automatic welding device in the present invention; Figure 2 It is a top view of the structure of the milling cutter automatic welding device in the present invention; Figure 3 isFigure 1 Partial enlarged view of the glue application structure in A Figure 4 Schematic diagram of applying flux by the glue application structure in the present invention Figure 5 Schematic diagram of installing the tool alloy in the present invention Figure 6 Schematic diagram of the silver wire filling position in the present invention Figure 7 is Figure 1 Partial enlarged view of the welding structure in B Figure 8 Schematic diagram of the welding structure in the present invention Figure 9 Schematic diagram of the welding position of the welding structure in the present invention Figure 10 Schematic diagram of the detection movement of the detection device in the present invention Figure 11 Schematic diagram of the detection position of the detection device in the present invention

[0017] In the figure: 1, base; 2, workbench; 21, clamping disk; 211, magnetic rod; 3, material tray; 4, loading robot; 5, vibrating disk; 6, alloy feeding robot; 7, glue application structure; 71, glue conveying pipe; 72, glue application pipe; 8, welding device; 81, lifting motor; 82, extrusion motor; 83, welding table; 831, outlet pipe; 832, high-frequency welding ring; 833, electromagnetic control ring; 834, guiding rod; 84, sliding module; 9, detection device; 10, tool body; 11, tool alloy; 12, silver wire. Detailed implementation manners

[0018] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0019] Please refer to Figures 1-2, A milling cutter automatic welding device, including a base 1 and a rotatable workbench 2 installed on the base 1. The workbench 2 is evenly provided with multiple groups of clamping disks 21 that can rotate independently and are used to fix the cutter body 10 to be welded. Through the circumferentially evenly arranged clamping disks 21, multi-station parallel processing is realized. The characteristic that each clamping disk 21 rotates independently enables it to adjust the orientation of the cutter body 10 according to the processing requirements. A material tray 3 containing the cutter body 10 is arranged on the base 1. The base 1 is also fixedly installed with a loading robot 4 that grabs the cutter body 10 from the material tray 3 and assembles it to the clamping disk 21. The loading robotic arm automatically grabs the cutter body 10 and accurately installs it to the rotating station, eliminating the efficiency bottleneck of manual loading and unloading and ensuring the positioning accuracy of the cutter body 10 during the transfer process; A vibrating disk 5 containing the cutting tool alloy 11 and a robot 6 for delivering the cutting tool alloy 11 to the clamping disk 21 in a directional manner are fixedly arranged on the base 1. The feeding system composed of the vibrating disk 5 and the robot 6 for delivering the alloy realizes the directional delivery and precise positioning of the cutting tool alloy 11. Through the cooperation of vibration sorting and mechanical clamping, it is ensured that the alloy sheet maintains a preset posture during the transfer process. A glue application structure 7 for coating and applying welding flux to the welding area of the cutting tool alloy 11 is arranged between the vibrating disk 5 and the robot 6 for delivering the alloy. The glue application structure 7 applies double-sided welding flux coating to the contact surface of the alloy sheet before it reaches the welding station, effectively improving the wettability and bonding strength of the welding interface, and at the same time avoiding the risk of uneven thickness existing in traditional manual coating, such as Figure 4 shown, a welding device 8 for welding the cutting tool alloy 11 and the cutter body 10 is also fixedly installed on the base 1; When the clamping disk 21 carries the cutter body 10 and rotates with the workbench 2 to the robot 6 for delivering the alloy, the cutting tool alloy 11 is positioned in the welding area. The coordinated operation of this device and the rotating station ensures the seamless connection of the multi-station processing rhythm, enabling the cutter body 10 to complete the full-process automation processing from assembly to welding during continuous transfer. Such as Figure 5 and Figure 6 shown; Subsequently, the workbench 2 continues to rotate to move the clamping disk 21 to the welding device 8 station for welding, as Figure 9 shown.

[0020] Among them, multiple stress relief layers are arranged on the surface of the cutting tool alloy 11. The multiple stress relief layers use Monel alloy (Ni-Cu based) as the first relief layer (thickness 0.02 - 0.1mm), and 410 stainless steel as the second relief layer (thickness 0.03 - 0.15mm), forming a gradient linear expansion coefficient (4.5 → 10 → 12×10⁻ 6( / K), and the surface is provided with a through-hole array structure: two layers are respectively provided with staggered through-holes with a diameter of φ0.1 - 0.3 mm (density 20 - 50 holes / cm²), the edges are rounded with a radius of R0.01 - 0.05 mm, and at the same time, the surface also adopts laser texturing technology to form a rough surface with Ra 1.6 - 3.2 μm, thereby enhancing mechanical interlocking. Before welding, the tool alloy 11 is ultrasonically cleaned (in an alcohol medium, power 200 W, time 10 min), and a self-made flux paste (the main component is KBF4 - LiF) is applied to clean the surfaces of the low-cobalt ultrafine-grained cemented carbide tool and the medium-carbon steel workpiece to be welded, removing impurities such as oil stains and oxide films on the surface. Methods such as sandpaper grinding and ultrasonic cleaning can be used to ensure that the welding surface is clean and flat.

[0021] Please refer to Figure 1 , Figure 2 , Figure 7 , Figure 8 and Figure 9 , the welding device 8 includes a lifting motor 81 and an extrusion motor 82. The lifting motor 81 is fixedly installed on the base 1, and the extrusion motor 82 is fixedly installed on the driving end of the lifting motor 81. The fixed installation of the lifting motor 81 on the base 1 ensures that the whole welding device 8 has a stable lifting motion reference plane. By integrating the extrusion motor 82 on the driving end of the lifting motor 81, the feeding mechanism of the silver wire 12 can be linked with the welding execution unit, maintaining the geometric consistency of the silver wire 12 conveying path synchronously during the lifting process, avoiding the wire feeding angle deviation caused by relative displacement, and ensuring the precise injection of the molten silver wire 12 into the weld gap. A welding table 83 is also fixedly installed on the driving end of the lifting motor 81. Along the circumferential direction of the welding table 83, there are two or more groups of outlet pipes 831 connected to the extrusion motor 82 through the silver wire 12. The welding table 83 enables the welding execution mechanism to adjust the axial distance from the tool body 10 as a whole with the lifting motion. A plurality of groups of outlet pipes 831 are arranged along the circumference of the welding table 83, and the silver wire 12 is synchronously driven by the extrusion motor 82 for conveying. This structure can realize synchronous filling operation for the circumferential welds of multi-edge tools. The outlet pipes 831 and the annular array distribution of the silver wire 12 form a distributed feeding system, completing the continuous filling of multiple welds in a single welding cycle, significantly improving the welding efficiency while ensuring the balanced heat input at each welding point. A high-frequency welding ring 832 is coaxially arranged on the welding table 83, and the high-frequency welding ring 832 is slidably connected to the driving end of the lifting motor 81. Along the circumferential direction of the welding table 83, two or more groups of guide rods 834 for controlling the welding position of the outlet pipes 831 are equidistantly arranged. The outlet pipes 831 are installed on the guide rods 834, and the guide rods 834 control the outlet pipes 831 to perform welding at the flux coating area of the tool alloy 11 and the tool body 10. After welding, pulse current aging treatment (current density 100 - 150 A / cm², time 30 - 60 s) is adopted to eliminate residual stress.

[0022] Please refer to Figure 1 、 Figure 2 、 Figure 3 and Figure 4 , the glue application structure 7 includes a glue delivery pipe 71 and a glue application pipe 72. The glue delivery pipe 71 is fixedly installed on the base 1. There are two or more glue delivery pipes 71. The glue application pipe 72 is communicated with the glue delivery pipe 71. Two or more glue application pipes 72 respectively coat the different welding surfaces of the tool alloy 11 with welding flux. By setting two or more glue delivery pipes 71 and communicating with the corresponding glue application pipes 72, the upper and lower or inner and outer welding surfaces of the tool alloy 11 can be coated synchronously, which is applicable to the tool alloy 11 with complex geometric shapes, ensuring that the welding flux forms a continuous and uniform covering layer on multiple contact surfaces and providing stable metallurgical bonding conditions for subsequent welding. There are also two or more magnetic rods 211 assembled on the clamping disc 21 to press the tool alloy 11 onto the tool body 10. Two or more magnetic rods 211 are arranged equidistantly in the circumferential direction of the clamping disc 21. When the workbench 2 drives the clamping disc 21 to rotate to different workstations, the uniform magnetic attraction generated by the array of magnetic rods 211 can effectively overcome the influence of centrifugal force on the positioning accuracy, which can not only prevent the tool alloy 11 from shifting during the dynamic transmission process, but also avoid the surface damage that may be caused by mechanical jigs. It is applicable to low-cobalt cemented carbide materials with high brittleness, ensuring the precise positioning state before welding. Please refer to Figure 1 、 Figure 2 、 Figure 10 and Figure 11 , a detection device 9 for detecting the installation position of the tool alloy 11 and the tool body 10 is also fixedly installed on the base 1. The detection device 9 is set to realize the automatic alignment and verification of the workpiece before welding. By using non-contact sensing technology to scan the assembly state of the workpiece in real time, it can accurately identify the relative position relationship between the tool alloy 11 and the notch of the tool body 10 and feedback it to the control system for attitude compensation.

[0023] Please refer to Figures 7-8, an electromagnetic regulation ring 833 is also coaxially arranged on the welding table 83. The electromagnetic regulation ring 833 is slidably connected to the driving end of the lifting motor 81. The electromagnetic regulation ring 833 includes an annular electromagnetic coil and an annular permanent magnet array. The magnetic field axis of the electromagnetic regulation ring 833 is orthogonal to the direction of the eddy current field generated by the high-frequency welding ring 832. The sliding connection design between the electromagnetic regulation ring 833 and the driving end of the lifting motor 81 enables the electromagnetic regulation ring 833 to flexibly adjust its relative position to the high-frequency welding ring 832 along the axial direction. The combination of the annular electromagnetic coil and the permanent magnet array can generate an auxiliary magnetic field in a specific direction. The axis of this magnetic field is orthogonal to the eddy current field generated by the high-frequency welding ring 832, and a spatial vector synthesis effect is formed through magnetic field superposition. The orthogonal magnetic field forces the eddy current electrons to gather in the welding core area, significantly improving the energy density, while offsetting the eddy current intensity in the edge area, thereby suppressing the lateral heat diffusion and reducing the risk of overheating at the edge, achieving precise control of the welding thermal field. The diameter of the electromagnetic regulation ring 833 is larger than that of the high-frequency welding ring 832, ensuring that the auxiliary magnetic field generated by it can cover the peripheral area of the high-frequency welding ring 832. This expands the action range of the magnetic field, forms a gradient-distributed magnetic field boundary during the welding process, and enhances the ability to constrain the eddy current path. The larger diameter also enables the auxiliary magnetic field to fully wrap the working area of the high-frequency welding ring 832, strengthening the magnetic field funnel effect, further concentrating the energy to the weld center, improving the welding efficiency and reducing the energy loss. As Figure 8 shown; and the electromagnetic regulation ring 833 can be arranged above or below the high-frequency welding ring 832, providing spatial flexibility for the shape adjustment of the welding thermal field. By changing the vertical position relationship between the two, the vector direction and gradient distribution after magnetic field superposition can be dynamically adjusted to adapt to the heat input requirements in different welding stages. For example, when the electromagnetic regulation ring 833 is placed above, its magnetic field can act on the top area of the weld preferentially, suppressing the splashing during the melting process of the silver wire 12; when placed below, it focuses on regulating the bottom heat conduction to ensure the stable formation of the molten pool, thereby achieving comprehensive thermal management during the welding process. A sliding module 84 for controlling the axial movement of the electromagnetic regulation ring 833 and the high-frequency welding ring 832 is also fixedly installed on the welding table 83.

[0024] Working principle: When the equipment is running, the loading robot 4 grabs the tool body 10 from the tray 3 and fixes it to the clamping disk 21 of the workbench 2. Subsequently, the workbench 2 rotates to move the clamping disk 21 with the tool body 10 to the position of the alloy feeding robot 6. The alloy feeding robot 6 first grabs the tool alloy 11 on the vibrating disk 5 and applies the welding flux to the two surfaces where the tool alloy 11 contacts the tool body 10 through two glue injection pipes 72 at the glue injection structure 7. Subsequently, the alloy feeding robot 6 reaches the position in front of the placement of the tool alloy 11 and waits. When the clamping disk 21 rotates to the position, the operation of placing the tool alloy 11 is carried out. The tool alloy 11 is placed at the target position after debugging through the sinking action of the alloy feeding robot 6. After that, the magnetic rod 211 presses the tool alloy 11, and the alloy feeding robot 6 performs the pushing and pressing actions in the direction of the tool body 10 and vertically downward to make the alloy reach the welding position. After the action is completed, the action of grabbing the tool alloy 11 is repeated. The installation of the alloy feeding robot 6 on the base 1 is determined according to the number of tool edges. When a three-edge milling cutter is used, three groups of alloy feeding robots 6 are installed on the base 1. The workbench 2 drives the clamping disk 21 to move among the three groups of alloy feeding robots 6 to complete the installation of the tool alloy 11 on the three sides of the tool body 10. When the installation of the three pieces of tool alloy 11 is completed, the workbench 2 transports the tool body 10 with the installed tool alloy 11 to the position of the welding device 8, and controls the welding table 83 to descend through the lifting motor 81. At the same time, the sliding module 84 controls the high-frequency welding ring 832 to descend to the set height to heat the inside of the lead-out pipe 831. After heating to the specified temperature, the silver wire 12 is extruded from the lead-out pipe 831 by driving the extrusion motor 82, so that the silver wire 12 passes through the welding surface to fill the gap between the tool body 10 and the tool alloy 11. At the same time, the high-frequency welding ring 832 starts to rise slowly, driving the silver wire 12 to slowly melt and fill the gap. After reaching the top of the tool body 10, it accelerates back to the standby position, and the action ends. During debugging, it is necessary to adjust the angle and position of the lead-out pipe 831 to ensure that the silver wire 12 can be sent to the welding position, use the processing controller to control the descending height to ensure that the silver wire 12 can reach the bottom of the tool alloy 11, and the slow rise can make the silver wire 12 reach the top. Adjust the wire feeding speed of the extrusion motor 82 or adjust the amount of welding flux applied to ensure that the silver wire 12 can reach the ideal passing state. When the welding of the tool body 10 is completed, the workbench 2 rotates again to move the clamping disk 21 under the loading robot 4, and the welded tool body 10 is disassembled from the clamping disk 21 by the loading robot 4 and placed at the specified position. Subsequently, a new tool body 10 is installed on the clamping disk 21 for a new round of processing. Among them, during the operation of the equipment, through the rotation of the workbench 2 and the clamping disk 21, multiple alloy feeding robots 6 and loading robots 4 work simultaneously. For example, when the welding device 8 is welding, multiple alloy feeding robots 6 are performing the operation of placing the tool alloy 11, and at the same time, the loading robot 4 is performing the operation of placing the tool body 10. After completion, the workbench 2 rotates for the next round of processing.After the feeding robot 4 finishes feeding, the detection device 9 detects the tool body 10 installed on the clamping disk 21 by the feeding robot 4. When the detection structure contacts the alloy groove of the tool body 10, a detection success signal is sent out to ensure that the tool body 10 is in the correct fixed direction when installed on the clamping disk 21.

[0025] During the welding process, the high-frequency welding ring 832 can induce eddy currents on the surface of the lead-out tube 831 and the silver wire 12 to generate resistance heat. At the same time, the electromagnetic control ring 833 generates a modifiable auxiliary magnetic field. When the magnetic fields of the two high-frequency welding rings 832 and the electromagnetic control ring 833 are superimposed in space, their vector synthesis will form a gradient distribution. Among them, the alternating magnetic field generated by the high-frequency welding ring 832 induces eddy currents in the lead-out tube 831 and the silver wire 12, while the electromagnetic control ring 833 can dynamically change the direction and intensity of the auxiliary magnetic field it generates by adjusting the current intensity and direction. This gradient change of the synthetic magnetic field will directly affect the distribution of eddy currents, so that in the region with a larger magnetic field gradient, the Lorentz force on the eddy current electrons is stronger, and the movement trajectory deviates towards the direction where the magnetic field gradient decreases, thus forcing the eddy currents to gather in the axial region of the lead-out tube 831. By precisely controlling the current parameters of the electromagnetic control ring 833, the eddy current path can be directionally guided, so that the heating energy is concentrated on the target area, realizing precise control of the heating zone morphology, greatly improving the heating efficiency of the high-frequency welding ring 832 and forming a magnetic field funnel effect in the target area. And the reverse magnetic field component generated by the electromagnetic control ring 833 on the periphery will also form a local cancellation effect with the original magnetic field of the high-frequency welding ring 832. Thus, the total magnetic field intensity at the edge of the welding table 83 is effectively reduced, and the eddy current density at this place is greatly reduced. At the same time, the magnetic barrier formed by the constraint effect at the magnetic field boundary restricts the lateral diffusion range of the eddy currents, thereby suppressing the generation of Joule heat in the edge area. This weakening of the magnetic field intensity and physical boundary constraint effectively avoids the problem of edge overheating, can ensure that the heat is concentrated in the welding central axis area, and avoids the influence of the surrounding area by the high-frequency welding ring 832. And the relative position of the electromagnetic control ring 833 and the high-frequency welding ring 832 is optimized in real time by controlling the distance between them through the sliding module 84; a smaller distance can enhance the magnetic field interaction and improve the eddy current guiding efficiency; while a larger distance reduces the coupling strength and avoids excessive interference. And combined with the real-time feedback of the temperature sensor, the current parameters and the distance are dynamically adjusted to form an adaptive thermal field control. For example, when it is detected that the edge temperature rises, the reverse current of the electromagnetic control ring 833 is increased and the distance is reduced to strengthen the edge magnetic field cancellation effect, so as to achieve a precise balance between the directional shaping of the welding thermal field and the elimination of overheating.

[0026] It should be noted that, in this document, relational terms such as first and second are only used 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 term "comprising", "including" or any other variation thereof is intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements not only includes those elements but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the phrase "comprising a..." does not exclude the presence of additional identical elements in the process, method, article or device comprising said element.

[0027] Although embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can 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. An automatic milling cutter welding device, comprising a base (1) and a rotatable workbench (2) installed on the base (1). The workbench (2) is evenly provided with multiple groups of clamping disks (21) that can rotate independently and are used for fixing the cutter body (10) to be welded. A material tray (3) containing the cutter body (10) is arranged on the base (1), and it is characterized in that: The base (1) is also fixedly installed with a loading robot (4) that picks up the tool body (10) from the material tray (3) and assembles it to the clamping disc (21); a vibrating disc (5) containing tool alloy (11) and a robot (6) for feeding the alloy to the clamping disc (21) are fixedly arranged on the base (1). A glue application structure (7) for coating flux on the welding joint of the tool alloy (11) is arranged between the vibrating disc (5) and the robot (6) for feeding the alloy. A welding device (8) for welding the tool alloy (11) and the tool body (10) is also fixedly installed on the base (1); when the clamping disc (21) carrying the tool body (10) rotates with the workbench (2) to the position of the robot (6) for feeding the alloy, the tool alloy (11) is positioned in the welding area; then the workbench (2) continues to rotate to move the clamping disc (21) to the working position of the welding device (8) for welding.

2. The automatic welding equipment for milling cutters according to claim 1, characterized in that: The welding device (8) includes a lifting motor (81) and an extrusion motor (82). The lifting motor (81) is fixedly installed on the base (1), and the extrusion motor (82) is fixedly installed on the driving end of the lifting motor (81). A welding table (83) is also fixedly installed on the driving end of the lifting motor (81). Two or more lead-out pipes (831) connected to the extrusion motor (82) by silver wires (12) are arranged on the welding table (83) along its circumferential direction. A high-frequency welding ring (832) is coaxially arranged on the welding table (83), and the high-frequency welding ring (832) is slidably connected to the driving end of the lifting motor (81).

3. The automatic welding equipment for milling cutters according to claim 1, characterized in that: The glue application structure (7) includes a glue delivery pipe (71) and a glue application pipe (72). The glue delivery pipe (71) is fixedly installed on the base (1), and there are two or more glue delivery pipes (71). The glue application pipe (72) is communicated with the glue delivery pipe (71), and two or more glue application pipes (72) respectively coat flux on different welding surfaces of the tool alloy (11).

4. An automatic milling cutter welding device according to claim 1, characterized in that: Two or more magnetic rods (211) for pressing the tool alloy (11) against the tool body (10) are also assembled on the clamping disc (21), and two or more magnetic rods (211) are arranged at equal intervals along the circumferential direction of the clamping disc (21).

5. An automatic milling cutter welding device according to claim 2, characterized in that: An electromagnetic control ring (833) is also coaxially arranged on the welding table (83), and the electromagnetic control ring (833) is slidably connected to the driving end of the lifting motor (81). The electromagnetic control ring (833) includes an annular electromagnetic coil and an annular permanent magnet array, and the magnetic field axis of the electromagnetic control ring (833) is orthogonal to the direction of the eddy current field generated by the high-frequency welding ring (832).

6. An automatic milling cutter welding device according to claim 5, characterized in that: The diameter of the electromagnetic control ring (833) is larger than that of the high-frequency welding ring (832); and the electromagnetic control ring (833) can be arranged above or below the high-frequency welding ring (832).

7. An automatic milling cutter welding device according to claim 5, characterized in that: A sliding module (84) for controlling the axial movement of the electromagnetic regulation ring (833) and the high-frequency welding ring (832) is also fixedly installed on the welding table (83).

8. The automatic welding equipment for milling cutters according to claim 2, characterized in that: Two or more guiding rods (834) for controlling the welding position of the lead-out pipe (831) are equidistantly arranged along the circumferential direction of the welding table (83). The lead-out pipe (831) is installed on the guiding rod (834), and the guiding rod (834) controls the lead-out pipe (831) to be welded at the flux coating application position between the cutting tool alloy (11) and the tool body (10).

9. An automatic milling cutter welding device according to claim 1, characterized in that: A detection device (9) for detecting the installation positions of the cutting tool alloy (11) and the tool body (10) is also fixedly installed on the base (1).

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