Double-wire-belt laser-electrolysis composite milling machining system

Abstract

The invention discloses a double-line-belt laser-electrolysis composite milling machining system which comprises a workpiece, a circulation and power system, a double-line-belt laser beam system and a composite milling cutter head. The laser beam system forms focusing line band laser with adjustable spacing and length through a beam splitter, a reflection cavity and a shaper, and the composite milling cutter head realizes uniform injection of electrolyte and shielding of an electric field through an electrode core with an array micro-flow groove, a conductive grid mesh and a suction device with a flexible insulating wall. The temperature of a machining area is increased through laser thermal activation, the electrochemical reaction activity is enhanced by cooperating with the electrolysis effect, the reaction area is limited through the insulating wall, a boundary electric field is shielded, and a multi-energy-field coupling mechanism is formed. Double-line-band laser can expand energy field coverage, and the machining efficiency and the surface quality are improved by combining electrolyte laminar flow and electric field uniformization design; the non-contact combined machining avoids deformation of large thin-wall components, and is suitable for high-quality and high-efficiency machining of large-format components in the fields of aerospace and the like.

Description

Technical Field

[0001] The invention relates to a double-wire laser-electrolysis composite milling processing system, belonging to the field of laser-electrolysis composite processing. Background Art

[0002] Large, thin-walled components are widely used in aerospace, energy, and transportation, but their large length-to-width-to-thickness ratio and low rigidity pose significant challenges to their machining (including milling). These components are susceptible to large machining errors due to deformation under stress, severe tool wear, and difficulties in ensuring machining accuracy and surface quality. Although chemical milling does not involve cutting forces, it poses significant environmental risks, suffers from poor precision controllability, and suffers from low machining efficiency. Electrochemical milling, a specialized machining method that has garnered considerable attention in the past decade, offers advantages such as zero machining forces, excellent surface quality, high material removal rates, and a relatively environmentally friendly process. It holds great potential for machining large, thin-walled components. However, existing electrochemical milling methods still suffer from low material removal efficiency and precision. To address this, researchers are developing higher-performance electrochemical milling or electrochemical energy field hybrid milling methods. Among these, laser-electrochemical hybrid milling is receiving particular attention.

[0003] Wang Kaijun and others from Henan Polytechnic University proposed a laser-electrolysis composite milling tool head (application number: CN118342142A), which uses a dual-line laser to irradiate the workpiece surface vertically downward to improve processing quality. However, the laser beam provided by this patent requires a large focal length, which is difficult to implement and does not reflect the laser system layout plan; Luo Xiangang from Tianfu Xinglong Lake Laboratory proposed a beam shaping device and shaping method (application number: CN119322415A), which uses a Powell lens to achieve a uniformly distributed straight beam. However, this solution and system can only realize single-beam laser, which cannot meet the high-efficiency processing requirements of dual-line laser.

[0004] This invention proposes a dual-wire laser-electrolytic composite milling system that integrates a laser system with an electrolytic machining system. Through innovative structural design, the area of ​​multi-energy field coupling is expanded, thereby achieving efficient and synergistic coupling of multiple energy fields, improving both machining efficiency and precision. This technology enables high-precision and high-efficiency machining of large, thin-walled parts, has broad industrial application prospects, and provides a new solution for the precision machining of large, thin-walled parts. Summary of the Invention

[0005] In order to solve the above problems, the technical solution of the present invention is: A dual-line laser-electrolysis composite milling processing system includes a workpiece, a circulation and power system, a dual-line laser beam system and a composite milling cutter head; the circulation and power system includes a main pump, an electrolyte, a liquid pump and an electrolysis power supply; the dual-line laser beam system includes a beam splitter, a reflection cavity, a shaper and a laser light path; the reflection cavity includes a reflection cavity seat and reflection mirrors symmetrically distributed to the front and back sides; the shaper includes a shaping mirror and a focusing mirror; the symmetry axis of the reflection cavity coincides with the symmetry axis of the beam splitter; there are two shaping mirrors and two focusing mirrors, both of which are symmetrically arranged below the reflection mirror with the symmetry axis of the beam splitter as the center line; the shaping mirror is located at the focusing Directly above the focusing mirror, the shaping mirror and the focusing mirror are arranged to be synchronously movable in opposite directions in the horizontal direction; the beam splitter and the shaping mirror are arranged to be movable in the vertical direction; the laser optical path includes a laser, an initial light beam emitted from the laser, two separated light beams converted from the initial light beam after vertically entering the beam splitter, two vertically downward reflected light beams formed by the two separated light beams being respectively obliquely injected into the reflecting mirror and reflected, two fan-shaped divergent light beams formed by the two reflected light beams being vertically injected into the shaping mirror, and two focal line bands of laser light with a focal length of f formed by the two fan-shaped divergent light beams being respectively injected downward into the focusing mirror; the two focal line bands of laser light act on the workpiece after passing through the composite milling cutter head; The composite milling cutter head is electrically connected to the negative pole of the electrolytic power supply; the workpiece is electrically connected to the positive pole of the electrolytic power supply; the composite milling cutter head is also connected to the main pump and the liquid extraction pump. After the electrolyte is injected into the composite milling cutter head through the main pump and acts on the workpiece, it is sucked out by the liquid extraction pump.

[0006] Preferably, the composite milling cutter head comprises an electrode core, an aspirator and a light-transmitting window; the electrode core is provided with a liquid inlet, a liquid storage chamber and a liquid spraying port; the liquid inlet is symmetrically arranged on the left and right sides of the liquid storage chamber; the liquid storage chamber is provided with a liquid spraying port at the lower end; the light-transmitting window is fixed directly above the liquid storage chamber; The aspirator is mounted on the outside of the electrode core, and is provided with a liquid return channel and a liquid extraction port. An insulating wall is provided at the lower end of the aspirator, and the liquid extraction port is located at the front and rear sides of the aspirator; the lower edge of the insulating wall is lower than the lower surface of the liquid injection port, forming a natural suction area; the liquid return channel connects the liquid extraction port and the natural suction area; The liquid inlet is connected to the main pump, the liquid extraction port is connected to the liquid extraction pump, and the electrode core is electrically connected to the negative electrode of the electrolysis power supply; The focal line laser reaches the workpiece surface after passing through the light-transmitting window and the liquid storage cavity.

[0007] Preferably, a grid is provided at the liquid spraying port, and the grid is electrically connected to the negative electrode of the electrolysis power supply; The focused line band laser is emitted from the grid after passing through the light-transmitting window and the liquid storage cavity, and reaches the surface of the workpiece.

[0008] Preferably, array micro-flow grooves are provided on the surrounding walls of the liquid spraying port.

[0009] Preferably, the spacing d between the two focal line lasers satisfies the relationship: d=4·Δy·tan(α / 4), wherein Δy is the vertical distance between the optical center of the beam splitter and the intersection of the two reflector planes, and α is the angle between the two separated light beams, that is, the splitting angle of the beam splitter.

[0010] Preferably, the length L of the focal line laser satisfies the relationship: L=2H·tan(β / 2), where H is the vertical distance between the optical center of the shaping mirror and the upper surface of the workpiece, and β is the divergence angle of the focal line laser.

[0011] Preferably, the relationship between the angle γ between the two reflectors and the beam splitting angle α of the beam splitter is: γ=α / 2.

[0012] Preferably, the array microfluidic channels have a width of 0.1-1 mm, a depth of 0.1-0.5 mm, and a channel spacing of 2-5 times the channel width.

[0013] Preferably, the distance d between the two focal line lasers is 5-20 mm.

[0014] Preferably, the length L of the focal line laser is 30-100 mm.

[0015] The operating principle of this invention is as follows: By integrating a dual-line laser beam system with a composite milling cutter head, it achieves coordinated control of the current density and temperature field in the processing area. The system uses a beam splitter to evenly split the laser beam into two sub-beams. These are then passed through a reflector, shaping mirror, and focusing mirror to form two focused line-band laser beams, which are then irradiated onto the workpiece surface, creating a wide, thermally activated region with adjustable spacing and length. The spacing and length of the focused line-band laser beams are adjusted by adjusting the height of the beam splitter and the vertical position of the shaping mirror, respectively, ensuring that the laser beam is always precisely focused on the processing area. The focused line-band laser beam shines onto the workpiece through the light-transmitting window and grid in the composite milling cutter head, effectively raising the local temperature, enhancing the electric field intensity, and suppressing low-current-density corrosion. The composite milling cutter head incorporates symmetrical liquid supply channels, a V-shaped liquid storage chamber, and an array of microfluidics to ensure uniform electrolyte discharge. Combined with an outer insulating wall, these channels provide electric field shielding and natural suction, stabilizing the flow and electric field distribution within the electrolysis area. A circulation and power system provides high-speed liquid supply and extraction channels, assisting in product removal and maintaining processing stability. The overall system works together through laser activation and electrolysis to improve processing efficiency and surface quality, and has high adaptability and wide controllability.

[0016] The present invention uses adjustable beam splitters, shaping lenses, and focusing lenses to adjust the spacing and length of the dual-line lasers, maintaining a symmetrical distribution and ensuring controllable laser energy coverage. During the focusing process, the laser beam forms a uniform and stable line energy field. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Schematic diagram of the optical path of the dual-line laser beam system of the present invention; Figure 2 Schematic diagram of the shaping process of the shaper in the present invention; Figure 3 This is a schematic diagram of the assembly of the composite milling cutter head of the present invention; Figure 4 It is a structural schematic diagram of the electrode core in the present invention; Figure 5 It is a structural schematic diagram of the aspirator in the present invention; Figure 6 It is a schematic diagram of the connection between the circulation and power system and the composite milling cutter head in the present invention; Figure 7 This is a schematic diagram of the centerline laser-electrolysis coupling principle of the present invention.

[0018] The numbers in the figure are: 1. Workpiece; 2. Circulation and power system; 21. Main pump; 22. Electrolyte; 23. Liquid pump; 24. Electrolysis power supply; 3. Dual-line laser beam system; 31. Beam splitter; 32. Reflection cavity; 321. Reflection cavity seat; 322. Reflection mirror; 33. Shaper; 331. Shaping mirror; 332. Focusing mirror; 34. Laser light path; 341. Laser; 342. Initial Outgoing beam; 343, separated beam; 344, reflected beam; 345, fan-shaped divergent beam; 346, focused line band laser; 4, compound milling cutter head; 41, electrode core; 411, liquid inlet; 412, liquid storage chamber; 413, liquid spray outlet; 414, array microfluidic channel; 42, aspirator; 421, liquid return channel; 422, liquid extraction port; 423, insulating wall; 43, grid; 44, light-transmitting window. DETAILED DESCRIPTION

[0019] The following combination Figures 1 to 7 The implementation of the present invention is described in further detail.

[0020] The spatial directions of the present invention are as shown in the accompanying drawings; A dual-line laser-electrolysis composite milling processing system includes a workpiece 1, a circulation and power system 2, a dual-line laser beam system 3 and a composite milling cutter head 4; the circulation and power system 2 includes a main pump 21, an electrolyte 22, a liquid pump 23 and an electrolysis power supply 24; the dual-line laser beam system 3 includes a beam splitter 31, a reflection cavity 32, a shaper 33 and a laser optical path 34; the reflection cavity 32 includes a reflection cavity seat 321 and reflection mirrors 322 symmetrically distributed on the left and right sides; the shaper 33 includes a shaping mirror 331 and a focusing mirror 332; the symmetry axis of the reflection cavity 32 coincides with the symmetry axis of the beam splitter 31, and there are two shaping mirrors 331 and two focusing mirrors 332, both of which are symmetrically arranged below the reflection mirror 322 with the symmetry axis of the beam splitter 31 as the center line; the shaping mirror 331 is located directly above the focusing mirror 332 , the shaping mirror 331 and the focusing mirror 332 can be synchronously moved in opposite directions in the horizontal direction to ensure that the reflected light beam 344 is always coaxial with the shaping mirror 331 and the focusing mirror 332; the beam splitter 31 and the shaping mirror 331 are moved in the vertical direction; the laser light path 34 includes a laser 341, an initial light beam 342 emitted from the laser 341, two separated light beams 343 formed by the initial light beam 342 vertically entering the beam splitter 31, two vertically downward reflected light beams 344 formed by the two separated light beams 343 being respectively obliquely injected into the corresponding reflecting mirrors 322 and then reflected, two fan-shaped divergent light beams 345 formed by the two reflected light beams 344 being respectively injected vertically into the corresponding shaping mirrors 331, and two focal line band lasers 346 with a focal length f formed by the two fan-shaped divergent light beams 345 being respectively injected downward into the corresponding focusing mirrors 332; The composite milling cutter head 4 includes an electrode core 41, an aspirator 42, a grid 43 and a light-transmitting window 44; the electrode core 41 is made of metal and is provided with a liquid inlet 411, a liquid storage chamber 412 and a liquid spray port 413; the liquid inlet 411 is symmetrically arranged on the left and right sides of the liquid storage chamber 412 of the electrode core 41; the liquid storage chamber 412 is a "V"-shaped inner cavity, and a rectangular liquid spray port 413 is provided at the lower end; the grid 43 is conductive and is installed at the bottom of the electrode core 41; the outer wall of the aspirator 42 is made of an electrically insulating material and is provided with a liquid return channel 421 and a liquid extraction port 422; the lower end of the outer wall of the aspirator 42 is provided with a flexible insulating wall 423; the flexible insulating wall 423 is made of an electrically insulating material, and its lower edge is thicker than the grid The lower surface of the mesh 43 is 0.1-0.5 mm lower, forming a natural suction zone. In a specific embodiment of the present application, the lower edge of the flexible insulating wall 423 is 0.2 mm lower than the lower surface of the grid 43. The aspirator 42 is arranged on the outside of the electrode core 41. The liquid extraction port 422 is located on the front and rear sides of the aspirator 42. The liquid return channel 421 connects the liquid extraction port 422 with the natural suction zone. The light-transmitting window 44 is fixed directly above the liquid storage chamber 412 and is made of optical glass. After the focused line laser 346 penetrates, it acts on both ends of the grid 43, forming a heat-activated area with controllable width on the surface of the workpiece 1. The surrounding walls of the liquid injection port 413 are provided with an array of micro-flow grooves 414 for laminar flow homogenization of the electrolyte 22. The liquid inlet 411 is connected to the main pump 21 to form a high-pressure liquid supply channel, and the liquid extraction port 422 is connected to the liquid extraction pump 23; the grid 43 of the electrode core 41 is electrically connected to the negative pole of the electrolytic power supply 24; the workpiece 1 is electrically connected to the positive pole of the electrolytic power supply 24; the circulation and power system 2 injects the electrolyte 22 into the liquid storage chamber 412 of the electrode core 41 through the main pump 21, and after rectification by the array microflow groove 414, a high-speed laminar flow is formed and ejected to the processing area. After flushing the product, it is guided to the liquid extraction port 422 by the flexible insulating wall 423 of the aspirator 42 for discharge.

[0021] The focused line laser 346 passes through the light-transmitting window 44 and the liquid storage chamber 412 and is emitted from the grid 43 to the surface of the workpiece 1, thereby directional activating the electric field attenuation area, increasing the temperature of the active area, and thus increasing the overall current density of the processing area, thereby preventing low current density corrosion from causing deterioration of the workpiece 1 surface. Combined with the shielding effect of the insulating wall 423 on the electric field, the overall electric field distribution in the reaction chamber is maintained at a high level, thereby improving efficiency and improving surface quality. The angle α between the two separated light beams 343 (i.e., the beam splitting angle of the beam splitter 31) and the divergence angle β of the focused line laser 346 are inherent design parameters of the system and remain constant during the processing process. In the specific embodiment of the present application, the angle α between the two separated light beams 343 is 90°, and the divergence angle β of the focused line laser 346 is 45°. The relationship between the angle γ between the two reflectors 322 and the beam splitting angle α of the beam splitter 31 is: γ=α / 2; in the specific embodiment of the present application, the angle γ between the reflectors 322 is 45°; The spacing d between the two focal line lasers 346 is adjusted by adjusting the height of the beam splitter 31 and the horizontal synchronous displacement of the shaping mirror 331 and the focusing mirror 332. That is, the spacing d between the two focal line lasers 346 satisfies the relationship: d = 4·Δy·tan(α / 4), where Δy is the vertical distance between the optical center of the beam splitter 31 and the intersection of the two reflective mirrors 322 planes. The length L of the focused line laser 346 is achieved by adjusting the height of the shaping mirror 331. That is, the shaping mirror 331 can be precisely moved in the vertical direction. By changing the distance H between the shaping mirror 331 and the surface of the workpiece 1, the length L of the focused line laser 346 satisfies the relationship: L = 2H·tan(β / 2), which is suitable for different processing width requirements, where H is the vertical distance between the optical center of the shaping mirror 331 and the upper surface of the workpiece 1. The spacing d of the focal line band laser 346 is 5~20mm, and the length L is 30~100mm; in the specific embodiment of the present application, the focal length f of the focusing mirror 332 is 45mm, and the shaping mirror 331 and the focusing mirror 332 are moved so that the reflected light beam 344 passes through the optical center of the two, and the beam splitter 31 is adjusted up and down synchronously so that the spacing d of the focal line band laser 346 is 15mm, and the distance between the shaping mirror 331 and the workpiece 1 is adjusted so that the length L of the focal line band laser 346 reaches 100mm; this system can achieve precise control of the spacing d of the focal line band laser 346 of 5~20mm through the height adjustment of the beam splitter 31, and can achieve dynamic matching of the length L of the focal line band laser 346 of 30~100mm by coordinating the vertical adjustment of the shaping mirror 331, so as to meet the size adaptation requirements of the serialized composite milling cutter head 4.

[0022] The width of the array micro-flow groove 414 is 0.1~1mm, the depth is 0.1~0.5mm, and the groove spacing is 2~5 times the groove width; in the specific embodiment of the present application, the width of the array micro-flow groove 414 is 0.5mm, the depth is 0.3mm, and the groove spacing is 1.5mm; the composite milling head 4 is compatible with a focal line band laser 346 with a spacing d of 15mm and a length L of 100mm.

[0023] A processing method of a dual-wire laser-electrolysis composite milling processing system, comprising: Step S1: Install the workpiece 1 and adjust the machining gap so that the grid 43 is 0.5 mm away from the workpiece 1 and the bottom of the aspirator 42 is 0.3 mm away from the surface of the workpiece 1; electrically connect the workpiece 1 to the positive electrode of the electrolysis power supply 24, electrically connect the electrode core 41 to the negative electrode of the electrolysis power supply 24, connect the main pump 21 to the liquid inlet 411 of the electrode core 41, and connect the liquid extraction pump 23 to the liquid extraction port 422 of the aspirator 42; Step S2: Turn on the main pump 21 and the liquid pump 23, set the total flow rates to 15 L / min and 45 L / min respectively, set the voltage of the electrolytic power supply 24 to 45 V, set the power of the laser 341 to 100 W, and start processing. The material of the workpiece 1 is removed by laser-enhanced electrochemical dissolution. Step S3: After the processing is completed, the electrolysis power supply 24, the laser 341, the main pump 21, and the liquid pump 23 are turned off in sequence, and the workpiece 1 is removed, cleaned, and dried.

[0024] The present invention has the following outstanding advantages: 1. A high-quality linear laser beam with variable energy field can be achieved.

[0025] The present invention utilizes an adjustable beam splitter 31, shaping lens 331, and focusing lens 332 to adjust the spacing and length of the dual-line laser beams, maintaining a symmetrical distribution and ensuring controllable laser energy coverage. During the focusing process, the laser beam forms a uniform and stable line energy field. Combined with the uniform electric field and laminar flow provided by the grid 43 structure, this effectively improves energy field uniformity and stability during processing.

[0026] 2. It can achieve extremely efficient milling processing.

[0027] The grid 43 structure in the composite milling cutter head 4 significantly improves the uniformity of current density distribution, enhancing material removal rates. Furthermore, the dual-wire laser increases local temperature without causing thermal damage, promoting electrochemical reaction activity. Compared to traditional single-wire laser methods, this invention provides greater energy field coverage and stronger synergistic effects, significantly improving overall processing efficiency.

[0028] 3. High precision and high surface quality processing effects can be achieved at the same time.

[0029] Insulating wall 423 limits the reaction area and shields the boundary electric field, keeping the processing range within the bottom area of ​​the tool tip. Processing accuracy is directly determined by the structure of insulating wall 423. Furthermore, the dual-band laser increases the temperature of the entire processing area. Combined with a highly uniform electric field distribution, it effectively suppresses low-current-density corrosion, reduces surface defects, and significantly improves the processed surface quality.

[0030] 4. Flexible application and good process flexibility.

[0031] The system supports flexible adjustment of the dual-line laser spacing (5–20mm) and length (30–100mm), and the laser always maintains a symmetrical distribution. The laser parameters and milling head matching method can be freely adjusted according to different processing requirements, realizing the integrated application of roughing and finishing, and improving the adaptability and process flexibility of the overall system.

[0032] The above content is only a preferred implementation case of the present invention. For those skilled in the art, many changes can be made in the specific implementation method and application scope based on the ideas of the present technical content, which are all within the scope of protection of this patent without departing from the concept of the present invention.

Claims

1. A dual-wire laser-electrolysis composite milling system, characterized in that: The invention comprises a workpiece (1), a circulation and power system (2), a dual-line laser beam system (3) and a composite milling cutter head (4); the circulation and power system (2) comprises a main pump (21), an electrolyte (22), a liquid pump (23) and an electrolytic power supply (24); the dual-line laser beam system (3) comprises a beam splitter (31), a reflection cavity (32), a shaper (33) and a laser light path (34); the reflection cavity (32) comprises a reflection cavity seat (321) and a pair of The reflectors (322) are distributed on both sides of the front and rear sides; the shaper (33) includes a shaping mirror (331) and a focusing mirror (332); the symmetry axis of the reflection cavity (32) coincides with the symmetry axis of the beam splitter (31); there are two shaping mirrors (331) and two focusing mirrors (332), both of which are symmetrically arranged below the reflector (322) with the symmetry axis of the beam splitter (31) as the center line; the shaping mirror (331) is located directly above the focusing mirror (332). The shaping mirror (331) and the focusing mirror (332) can be synchronously moved in opposite directions in the horizontal direction; the beam splitter (31) and the shaping mirror (331) are moved in the vertical direction; the laser light path (34) includes a laser (341), an initial light beam (342) emitted from the laser (341), the initial light beam (342) vertically entering the beam splitter (31) and then converted into two separated light beams (343), and the two separated light beams (343) are respectively inclined to enter Two vertically downward reflected light beams (344) are formed after being reflected by the reflector (322); two fan-shaped divergent light beams (345) are formed after the two reflected light beams (344) are vertically incident on the shaping mirror (331); and two focused line band lasers (346) with a focal length of f are formed after the two fan-shaped divergent light beams (345) are respectively incident downward on the focusing mirror (332); the two focused line band lasers (346) pass through the composite milling cutter head (4) and act on the workpiece (1); The composite milling cutter head (4) is electrically connected to the negative electrode of the electrolytic power supply (24); the workpiece (1) is electrically connected to the positive electrode of the electrolytic power supply (24); the composite milling cutter head (4) is also connected to the main pump (21) and the liquid extraction pump (23); the electrolyte (22) is injected into the composite milling cutter head (4) through the main pump (21) and acts on the workpiece (1), and then is sucked out by the liquid extraction pump (23).

2. The dual-wire laser-electrolysis composite milling system according to claim 1, characterized in that: The composite milling cutter head (4) comprises an electrode core (41), an aspirator (42) and a light-transmitting window (44); the electrode core (41) is provided with a liquid inlet (411), a liquid storage chamber (412) and a liquid spraying port (413); the liquid inlet (411) is symmetrically arranged on the left and right sides of the liquid storage chamber (412); the liquid spraying port (413) is provided at the lower end of the liquid storage chamber (412); the light-transmitting window (44) is fixed directly above the liquid storage chamber (412); The aspirator (42) is arranged outside the electrode core (41), and is provided with a liquid return channel (421) and a liquid extraction port (422). An insulating wall (423) is provided at the lower end of the aspirator (42), and the liquid extraction port (422) is located at the front and rear sides of the aspirator (42); the lower edge of the insulating wall (423) is lower than the lower surface of the liquid injection port (413), forming a natural suction area; the liquid return channel (421) communicates with the liquid extraction port (422) and the natural suction area; The liquid inlet (411) is connected to the main pump (21), the liquid extraction port (422) is connected to the liquid extraction pump (23), and the electrode core (41) is electrically connected to the negative electrode of the electrolysis power supply (24); The focused line band laser (346) reaches the surface of the workpiece (1) after passing through the light-transmitting window (44) and the liquid storage chamber (412).

3. The dual-wire laser-electrolysis composite milling system according to claim 2, characterized in that: A grid (43) is provided at the liquid spray port (413), and the grid (43) is electrically connected to the negative electrode of the electrolysis power supply (24); The focused line band laser (346) passes through the light-transmitting window (44) and the liquid storage chamber (412), and is emitted from the grid (43) to reach the surface of the workpiece (1).

4. The dual-wire laser-electrolysis composite milling system according to claim 2, characterized in that: Array micro-flow grooves (414) are provided on the surrounding walls of the liquid spraying port (413).

5. The dual-wire laser-electrolysis composite milling system according to claim 1, characterized in that: The distance d between the two focal line lasers (346) satisfies the relationship: d=4·Δy·tan(α / 4), wherein Δy is the vertical distance between the optical center of the beam splitter (31) and the intersection point of the two reflective mirrors (322) planes, and α is the angle between the two separated light beams (343), i.e., the beam splitting angle of the beam splitter (31).

6. The dual-wire laser-electrolysis composite milling system according to claim 1, characterized in that: The length L of the focal line laser (346) satisfies the relationship: L=2H·tan(β / 2), wherein H is the vertical distance between the optical center of the shaping mirror (331) and the upper surface of the workpiece (1), and β is the divergence angle of the focal line laser (346).

7. The dual-wire laser-electrolysis composite milling system according to claim 1, characterized in that: The relationship between the included angle γ between the two reflecting mirrors (322) and the beam splitting angle α of the beam splitter (31) is: γ=α / 2.

8. The dual-wire laser-electrolysis composite milling system according to claim 4, characterized in that: The array microfluidic groove (414) has a width of 0.1-1 mm, a depth of 0.1-0.5 mm, and a groove spacing of 2-5 times the groove width.

9. The dual-wire laser-electrolysis composite milling system according to claim 5, characterized in that: The distance d between the two focal line band lasers (346) is 5-20 mm.

10. The dual-wire laser-electrolysis composite milling system according to claim 6, characterized in that: The length L of the focal line band laser (346) is 30-100 mm.

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