Liquid pressing / sucking alternating type line band laser-electrolytic milling processing system and liquid pressing / sucking alternating type line band laser-electrolytic milling processing method

Abstract

The invention belongs to the field of laser-electrolysis combined machining, and particularly relates to a liquid pressing / sucking alternating type line belt laser-electrolysis milling machining system and method.The system comprises an electrolysis power source, a line belt laser beam, an electrolyte circulating system and a tool bit body; in the machining process, a line band laser beam is emitted into the light-transmitting cavity from the light-transmitting window and is transmitted to the surface of a workpiece from the bottom of the tool bit body through the focus lens for laser-electrolysis combined machining. The liquid supply direction of the electrolyte is controlled through the two-position four-way electromagnetic valve, reciprocating cooperation of right-moving left liquid supply and left-moving right liquid supply is achieved, a uniform and stable flow field is formed in combination with a concave arc flow channel structure, and the mass transfer efficiency and locality are effectively improved. The tool bit is simple and compact in structure and easy to implement, and the machining method based on the tool bit is suitable for high-efficiency, high-precision and high-surface-quality milling machining of large-breadth metal pieces.

Description

Technical Field

[0001] The present invention belongs to the field of laser-electrolysis composite processing, and in particular relates to a pressure / liquid-absorption alternating line-belt laser-electrolysis milling processing system and method. Background Art

[0002] With the surging demand for large, thin-walled components made of difficult-to-machine metal materials such as high-temperature alloys and titanium alloys in the aerospace industry, traditional mechanical milling methods are unable to meet the requirements for high-quality and efficient machining due to severe tool wear and insufficient machining precision. Special machining technologies include laser milling and electrolytic milling. While laser milling offers advantages such as wide material applicability, no mechanical deformation, and no tool wear, it is limited by inefficient material removal caused by heat-affected layers, recast defects, and millimeter-scale laser spot. Electrolytic milling, while characterized by no thermal damage and excellent surface quality, faces the bottleneck of achieving a synergistic improvement in forming accuracy and machining efficiency. While existing laser-electrolytic composite milling technologies partially alleviate this contradiction through energy field coupling, they are still limited by low laser power transmission efficiency in the machining area caused by the turbulent flow field of the coaxial structure. Furthermore, existing wire-strip laser composite jet electrolytic milling tools are complex and difficult to design, requiring specialized structures such as baffles to control the flow field. This leads to secondary corrosion, poor surface consistency, and efficiency bottlenecks when machining large, weakly rigid workpieces.

[0003] Chinese patent publication number CN114850596A discloses a laser-jet electrolysis composite machining method for a double-tube tool electrode and milling process. This patent utilizes a double-tube tool electrode and an annular laser beam, significantly increasing the processing area per single pass and significantly boosting processing efficiency. However, this annular laser beam is difficult to implement and expensive, making it unsuitable for engineering applications.

[0004] Chinese patent publication number CN118616828A proposes a laser-electrolysis composite machining tool with a polygonal metal cathode and dual flow channels. This device utilizes a polygonal metal cathode, configured as three circumferentially connected metal sidewalls. This increases the cathode area, allowing for better coupling between the laser and electrolysis, and improving machining efficiency. However, this structural design can also result in uneven flow field distribution, which in turn reduces machining accuracy.

[0005] Chinese patent publication number CN116618765A proposes a heteroaxial laser-electrolysis hybrid high-efficiency milling device and method. The laser processing system emits laser light perpendicularly to the anode workpiece surface, with the angle controlled by an angler, while the laser is aligned with the cathode nozzle. This prevents laser power loss in the liquid and significantly improves processing efficiency. However, the flow field is difficult to control, resulting in severe stray corrosion.

[0006] In summary, the present invention provides a pressure / liquid suction alternating wire strip laser-electrolytic milling processing system and method to solve the problems of easy deformation of the wire strip laser beam, large energy field attenuation, difficulty in realizing and controlling the localized flow field effect, and difficulty in engineering application. Summary of the Invention

[0007] In view of the shortcomings of the existing laser-electrolysis composite machining tool heads, the purpose of the present invention is to provide a single-sided ejection-suction laser composite wide-width jet electrolysis milling tool to achieve efficient, high-precision and high-quality milling of large-format metal workpieces.

[0008] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is as follows.

[0009] A pressure / suction alternating wire-strip laser-electrolytic milling processing system comprises an electrolytic power supply, a wire-strip laser beam, an electrolyte circulation system, and a tool head body; the positive and negative electrodes of the electrolytic power supply are electrically connected to a workpiece and the tool head body, respectively; the electrolyte circulation system comprises an electrolyte pump, a suction pump, a two-position four-way solenoid valve, and electrolyte, the electrolyte pump and the suction pump being used to pump out and suck back the electrolyte, respectively; the tool head body comprises a liquid spray port, a light-transmitting cavity, a left liquid storage cavity, a left liquid outlet, a left flow channel, and a right liquid storage cavity, a right liquid outlet, and a right flow channel symmetrically arranged on both sides of the light-transmitting cavity; a light-transmitting window is provided at the top of the light-transmitting cavity, and a sealed focusing mirror is provided at the bottom; the wire-strip laser beam is incident perpendicularly from the symmetric axis of the light-transmitting window, passes through the light-transmitting cavity, and then is emitted from the focusing mirror and converges at the liquid spray port of the tool head body; The lower end surfaces of the outer side walls of the left flow channel and the right flow channel are on the same horizontal plane and are lower than the lowest end of the focusing mirror, and their upper ports are respectively connected to the left liquid storage chamber and the right liquid storage chamber, and the lower ports are symmetrically distributed on the left and right sides of the liquid spray port; the left liquid port and the right liquid port are respectively symmetrically arranged on the outer side walls of the left liquid storage chamber and the right liquid storage chamber, and the left liquid port and the right liquid port are respectively connected to the electrolyte pump or the suction pump through a two-position four-way solenoid valve; the left flow channel and the right flow channel are both concave arc-shaped, the curvature of the concave arc at their bottom is continuous, and the center of the concave arc at their bottom is located on the center line of the light-transmitting cavity.

[0010] Preferably, the radius R of the concave arc where the bottom is located and the width L of the liquid injection port satisfy the formula: .

[0011] Preferably, the cutter head body is made of a metal material that is resistant to acid and alkali corrosion.

[0012] Preferably, the cross-sections of the left flow channel and the right flow channel are both rectangular, the width of the rectangle is ≥0.1 mm, and the ratio of the length to the width of the rectangle is greater than 10.

[0013] Preferably, the light-transmitting window and the focusing mirror are both made of K9 glass with a light-transmitting film coated on the outer surface.

[0014] Preferably, the width of the focusing lens is 0.2-1 mm.

[0015] Preferably, the width of the linear laser beam is 100-200 μm, and the length is equal to the length of the focusing lens.

[0016] A processing method of a pressure / liquid-suction alternating line laser-electrochemical milling processing system, comprising: Step S1: vertically place the cutter head body just above the starting position of the area to be processed of the workpiece, adjust the height between the lower end of the cutter head body and the starting position of the area to be processed to a set value, electrically connect the positive pole of the electrolytic power supply to the workpiece, and the negative pole to the cutter head body, start the electrolyte circulation system so that the lower end of the cutter head body and the workpiece are completely immersed in the electrolyte, and make the left position of the two-position four-way solenoid valve in a working state. At this time, under the action of the electrolyte pump, the electrolyte enters the left liquid storage chamber through the left liquid port and flows through the left flow channel, and then a part of the electrolyte flows to the gap between the cutter head body and the workpiece through the liquid spray port, and the other part of the electrolyte flows from the right flow channel to the right liquid storage chamber under the action of the negative pressure of the suction pump and is extracted through the right liquid port and flows back to the electrolyte circulation system; Step S2: A linear laser beam that meets the set optical performance requirements is passed through the light-transmitting window, then exits the light through the light-transmitting cavity and focusing lens and irradiates the workpiece surface vertically. Simultaneously, the electrolytic power supply is activated and the cutter head body is moved rightward at a set speed. At this time, the workpiece corresponding to the liquid nozzle is removed under the synergistic action of electrochemistry, laser, and fluid. Step S3: When the cutter head body reaches the end position according to the set path, the cutter head body is moved in the reverse direction. At the same time, the right position of the two-position four-way solenoid valve is switched to the working state. At this time, the electrolyte enters the right liquid storage chamber through the right liquid port under the action of the electrolyte pump and flows through the right flow channel. Then, part of the electrolyte flows to the gap between the cutter head bodies through the liquid spray port. The other part of the electrolyte flows from the left flow channel to the left liquid storage chamber under the action of the negative pressure of the suction pump and is extracted through the left liquid port and flows back to the electrolyte circulation system. In this process, the corresponding workpiece below the liquid spray port is removed under the synergistic action of electrochemistry, laser and fluid. Step S4: According to the processing requirements, during the movement of the cutter head body, the working position of the two-position four-way solenoid valve is continuously switched according to the principle of "moving right to the left station, moving left to the right station" to process the workpiece until the set processing task is completed. At this time, the electrolytic power supply and the electrolyte circulation system are turned off, and the wire laser beam is turned off to complete the processing.

[0017] Compared with the prior art, the present invention has the following main advantages: 1. Laser energy field loss is minimal, and the laser beam spot shape is easily controlled, easily meeting different process requirements. In this invention, the laser beam is directly applied to the processing area through a light-transmitting cavity. The coupled transmission between the laser and the electrolyte occurs only within the processing gap, essentially eliminating the electrolyte's influence on the laser transmission process, resulting in higher laser energy utilization. Furthermore, the laser beam is largely unaffected by electrolyte interference, enhancing the controllability of the laser beam and maintaining a stable shape.

[0018] 2. The flow field is easier to control locally and more convenient to regulate. The present invention realizes the precise management of the electrolyte flow path, and the direction of the flow field velocity can be changed only by switching the position of the reversing valve. Compared with the baffles and complex suction structures in other wire-strip laser composite jet electrolytic milling tools, the arc flow channel design with the same center makes the electrolyte guided by the centripetal force in the process of flowing through the arc channel, and converges to the vicinity of the center axis of the flow channel, and then is drawn away by negative pressure, which greatly reduces the scattered overflow of the electrolyte on the side wall of the tool and the non-processing area, so that the metal dissolution occurs only on the target surface, effectively suppresses the stray corrosion in the non-target area, and is more likely to achieve the required processing effect.

[0019] 3. The cutter head has a simple structure, is easy to implement, and the process is easy to implement, resulting in good processing results. The present invention greatly simplifies the structure and processing cost of the cutter head body, eliminating the need to consider the thorny issues of sealing and light transmission. In the present invention, the flow field is controlled by the inner shell and cover of the cutter, which does not impose stringent requirements on the internal structure, does not require additional mechanisms to control the flow field, and is easy to manufacture. On the other hand, the cutter changes the overall flow direction of the electrolyte through a reversing valve, thereby changing the processing direction. This makes operation simple and the processing surface precision high. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A schematic diagram of the working process of a laser-electrochemical milling system with alternating pressure / liquid suction is shown to the right; Figure 2 A schematic diagram of the left-hand processing of a pressure / liquid-suction alternating wire-strip laser-electrochemical milling system; Figure 3 for Figure 1 A partial enlarged view of point A in the middle; Figure 4 It is a three-dimensional schematic diagram of a cutter head body processed by a pressure / liquid suction alternating line laser-electrochemical milling method.

[0021] The numbers in the figure are as follows: 1. Cutting head body; 2. Electrolytic power supply; 3. Workpiece; 4. Electrolyte circulation system; 4-1. Electrolyte pump; 4-2. Suction pump; 4-3. Two-position four-way solenoid valve; 5. Left liquid outlet; 6. Left liquid storage chamber; 7. Left flow channel; 8. Right flow channel; 9. Right liquid storage chamber; 10. Right liquid outlet; 11. Electrolyte; 12. Light-transmitting window; 13. Light-transmitting chamber; 14. Focusing mirror; 15. Linear laser beam; 16. Liquid spraying port. DETAILED DESCRIPTION

[0022] The implementation of the present invention will be further described below with reference to the accompanying drawings.

[0023] To avoid ambiguity, set the Figure 1 or attached Figure 2 The horizontal direction shown in is the width direction, and the horizontal direction perpendicular to the width direction is the length direction.

[0024] A pressure / suction alternating line-strip laser-electrolytic milling processing system, comprising an electrolytic power supply 2, a line-strip laser beam 15, an electrolyte circulation system 4, and a cutter head body 1; the positive and negative poles of the electrolytic power supply 2 are electrically connected to a workpiece 3 and the cutter head body 1, respectively; the electrolyte circulation system 4 comprises an electrolyte pump 4-1, a suction pump 4-2, a two-position four-way solenoid valve 4-3, and an electrolyte 11, the electrolyte pump 4-1 and the suction pump 4-2 are used to pump out and suck back the electrolyte 11, respectively; the flow rate provided by the electrolyte pump 4-1 is 10L / min, and the negative pressure provided by the suction pump 4-2 is -5000Pa; the cutter head body 1 comprises a liquid spray port 16, a light-transmitting cavity 13, a left liquid storage cavity 6 symmetrically arranged on both sides of the light-transmitting cavity 13, a left liquid port 5, The left flow channel 7 and the right liquid storage chamber 9, the right liquid port 10, and the right flow channel 8; the electrolysis power supply 2 is a programmable DC power supply (IT6122, ITECH, China), the cross-sections of the left flow channel 7 and the right flow channel 8 are both rectangular, the width of the rectangle is ≥0.1mm, and the ratio of the length to the width of the rectangle is greater than 10, so that the tool can maintain a high flow rate when processing large areas; in the specific embodiment of the present application, the upper port cross-section of the left flow channel 7 and the right flow channel 8 has a rectangular length of 30mm and a width of 2.5mm, and the lower port cross-section of the left flow channel 7 and the right flow channel 8 has a rectangular length of 30mm and a width of 2mm, forming an accelerating flow channel; the light-transmitting cavity 13 is used to inject the linear laser beam 15, and the light-transmitting cavity 1 3 is provided with a light-transmitting window 12 at the top and a sealed focusing mirror 14 at the bottom, both of which are made of K9 glass with a light-transmitting film coated on the outer surface, and the rest of the cutter head body 1 is made of metal material resistant to acid and alkali corrosion; the lower end surfaces of the outer side walls of the left flow channel 7 and the right flow channel 8 are on the same horizontal plane and are 0.1-0.3 mm lower than the focusing mirror 14. In the specific embodiment of the present application, the lower end surfaces of the outer side walls of the left flow channel 7 and the right flow channel 8 are on the same horizontal plane and are 0.2 mm lower than the focusing mirror 14, and their upper ports are respectively connected to the left liquid storage chamber 6 and the right liquid storage chamber 9, and the lower ports are symmetrically distributed on the left and right sides of the liquid injection port 16; the left liquid port 5 and the right liquid port 10 are symmetrically arranged on the left liquid storage chamber 6 and the right liquid storage chamber 9, respectively. The outer wall of the liquid storage chamber 9, the left liquid port 5 and the right liquid port 10 are respectively connected to the electrolyte pump 4-1 or the suction pump 4-2 through the two-position four-way solenoid valve 4-3; the left flow channel 7 and the right flow channel 8 are both concave arc-shaped, and the curvature of the concave arc at their bottom is continuous. The center of the concave arc at the bottom is located on the center line of the light-transmitting cavity 13. The radius R of the concave arc at the bottom and the width L of the liquid injection port 16 satisfy the formula: R=2L, the width L of the liquid injection port 16 is the effective working width of the tool head, which is 8mm, and the radius R of the concave arc at the bottom is 16mm; the width of the focusing mirror 14 is 0.2~1mm, and the width of the line laser beam 15 in the focusing plane is 100~200μm, and the length is equal to the length of the focusing mirror 14.

[0025] Taking rightward processing as an example, the electrolyte 11 is pressed into the left flow channel 7, and then the electrolyte 11 after participating in the electrochemical reaction is extracted from the right flow channel 8, so that the electrolyte 11 is mainly concentrated on the unprocessed surface, reducing corrosion to the processed surface, wherein the electrolyte 11 is a NaNO3 solution with a concentration of 10wt%; the line laser beam 15 is vertically injected from the center line of the light-transmitting window 12, and then emitted from the focusing mirror 14 through the light-transmitting cavity 13, and finally focused on the surface of the workpiece 3; wherein the line laser beam 15 is green light with a wavelength of 532±0.5nm, a width of 150μm, and a length of 30mm; the laser and the electrolyte 11 act on the surface of the workpiece 3 at the same time. When stainless steel is used as the processing material, a groove with a width of 30mm and a length of the set value of a single scan can be obtained after one round trip, completing the laser-electrolytic composite milling processing of the workpiece.

[0026] The processing method of the laser-electrolysis composite milling system of the technical solution of the present invention is as follows: Step S1: vertically place the cutter head body 1 just above the starting position of the area to be processed of the workpiece 3, adjust the height of the lower end of the cutter head body 1 at the starting position of the area to be processed to a set value, electrically connect the positive pole of the electrolytic power supply 2 to the workpiece 3, and electrically connect the negative pole to the cutter head body 1, start the electrolyte circulation system 4 so that the lower end of the cutter head body 1 and the area to be processed of the workpiece 3 are completely immersed in the electrolyte 11, and make the left position of the two-position four-way solenoid valve 4-3 in a working state. At this time, the electrolyte 11 enters the left liquid storage chamber 6 through the left liquid port 5 under the action of the electrolyte pump 4-1, and then flows through the left flow channel 7. Then, a part of the electrolyte 11 flows to the gap between the cutter head body 1 and the workpiece 3 through the liquid spray port 16, and the other part of the electrolyte 11 flows from the right flow channel 8 to the right liquid storage chamber 9 under the action of the negative pressure of the suction pump 4-2, and is extracted through the right liquid port 10 and flows back to the electrolyte circulation system 4; Step S2: A linear laser beam 15 meeting the set optical performance requirements is passed through the light-transmitting window 12, then exits through the light-transmitting cavity 13 and the focusing lens 14 and irradiates vertically onto the surface of the workpiece 3. Simultaneously, the electrolytic power supply 2 is started and the cutter head body 1 is moved rightward at a set speed. At this time, the workpiece 3 corresponding to the liquid injection port 16 is removed under the synergistic action of electrochemistry, laser, and fluid. Step S3: When the cutter head body 1 reaches the end position according to the set path, the cutter head body 1 is moved in the reverse direction. At the same time, the right position of the two-position four-way solenoid valve 4-3 is switched to the working state. At this time, the electrolyte 11 enters the right liquid storage chamber 9 through the right liquid port 10 under the action of the electrolyte pump 4-1, and then flows through the right flow channel 8. Then, a part of the electrolyte 11 flows to the gap between the cutter head body 1 and the workpiece 3 through the liquid spray port 16. The other part of the electrolyte 11 flows from the left flow channel 7 to the left liquid storage chamber 6 under the action of the negative pressure of the suction pump 4-2, and is extracted through the left liquid port 5 and flows back to the electrolyte circulation system 4. In this process, the workpiece 3 corresponding to the lower portion of the liquid spray port 16 is removed under the synergistic action of electrochemistry, laser and fluid. Step S4: According to the processing requirements, during the left and right movement of the cutter head body 1, the working position of the two-position four-way solenoid valve 4-3 is continuously switched according to the principle of "moving left to the right station, moving right to the left station" to process the workpiece 3 until the set processing task is completed. At this time, turn off the electrolytic power supply 2 and the electrolyte circulation system 4, turn off the wire laser beam 15, and complete the processing.

Claims

1. A pressure / suction alternating wire strip laser-electrochemical milling system, characterized in that: The invention comprises an electrolytic power supply (2), a linear laser beam (15), an electrolyte circulation system (4) and a cutter head body (1); the positive and negative electrodes of the electrolytic power supply (2) are electrically connected to the workpiece (3) and the cutter head body (1) respectively; the electrolyte circulation system (4) comprises an electrolyte pump (4-1), a suction pump (4-2), a two-position four-way solenoid valve (4-3) and an electrolyte (11); the electrolyte pump (4-1) and the suction pump (4-2) are used to pump out and suck back the electrolyte (11) respectively; the cutter head body (1) comprises a liquid spray port (16), a liquid pump (4-2) and a liquid pump (4-3). A light-transmitting cavity (13), a left liquid storage cavity (6), a left liquid outlet (5), a left flow channel (7), and a right liquid storage cavity (9), a right liquid outlet (10), and a right flow channel (8) symmetrically arranged on both sides of the light-transmitting cavity (13); a light-transmitting window (12) is provided at the top of the light-transmitting cavity (13), and a sealed focusing mirror (14) is provided at the bottom; the linear laser beam (15) is vertically incident from the symmetry axis of the light-transmitting window (12), passes through the light-transmitting cavity (13), and then is emitted from the focusing mirror (14) and converges at the liquid injection port (16) of the cutter head body (1); The lower end surfaces of the outer walls of the left flow channel (7) and the right flow channel (8) are on the same horizontal plane and lower than the lowest end of the focusing mirror (14), and their upper ports are respectively connected to the left liquid storage chamber (6) and the right liquid storage chamber (9), and the lower ports are symmetrically distributed on the left and right sides of the liquid injection port (16); the left liquid port (5) and the right liquid port (10) are respectively symmetrically arranged on the outer walls of the left liquid storage chamber (6) and the right liquid storage chamber (9), and the left liquid port (5) and the right liquid port (10) are respectively connected to the electrolyte pump (4-1) or the suction pump (4-2) through the two-position four-way solenoid valve (4-3); the left flow channel (7) and the right flow channel (8) are both concave arc-shaped, the curvature of the concave arc at their bottom is continuous, and the center of the concave arc at their bottom is located on the center line of the light-transmitting cavity (13).

2. A pressure / liquid suction alternating wire strip laser-electrochemical milling system according to claim 1, characterized in that: The radius R of the concave arc where the bottom is located and the width L of the liquid injection port (16) satisfy the formula: .

3. The pressure / suction alternating wire strip laser-electrochemical milling system according to claim 1, characterized in that: The cutter head body (1) is made of a metal material that is resistant to acid and alkali corrosion.

4. The pressure / suction alternating wire strip laser-electrochemical milling system according to claim 1, characterized in that: The cross-sections of the left flow passage (7) and the right flow passage (8) are both rectangular, the width of the rectangle is ≥0.1 mm, and the ratio of the length to the width of the rectangle is greater than 10.

5. The pressure / suction alternating wire strip laser-electrochemical milling system according to claim 1, characterized in that: The light-transmitting window (12) and the focusing mirror (14) are both made of K9 glass with a light-transmitting film coated on the outer surface.

6. The pressure / suction alternating wire strip laser-electrochemical milling system according to claim 1, characterized in that: The width of the focusing mirror (14) is 0.2-1 mm.

7. The pressure / suction alternating wire strip laser-electrochemical milling system according to claim 1, characterized in that: The width of the linear laser beam (15) is 100-200 μm, and the length is equal to the length of the focusing mirror (14).

8. A processing method based on the pressure / liquid-suction alternating wire strip laser-electrochemical milling processing system according to any one of claims 1 to 7, characterized in that: include: Step S1: vertically place the cutter head body (1) directly above the starting position of the area to be processed of the workpiece (3), adjust the height between the lower end of the cutter head body (1) and the starting position of the area to be processed to a set value, electrically connect the positive electrode of the electrolytic power supply (2) to the workpiece (3), and the negative electrode to the cutter head body (1), start the electrolyte circulation system (4) so ​​that the lower end of the cutter head body (1) and the workpiece (3) are completely immersed in the electrolyte (11) and the left position of the two-position four-way solenoid valve (4-3) is set. In the working state, at this time, the electrolyte (11) enters the left liquid storage chamber (6) through the left liquid port (5) under the action of the electrolyte pump (4-1), and then flows through the left flow channel (7), and then a part of the electrolyte (11) flows to the gap between the tool head body (1) and the workpiece (3) through the liquid spray port (16), and the other part of the electrolyte (11) flows from the right flow channel (8) to the right liquid storage chamber (9) under the action of the negative pressure of the suction pump (4-2) and is extracted through the right liquid port (10) and flows back to the electrolyte circulation system (4); Step S2: A linear laser beam (15) that meets the set optical performance requirements is passed through the light-transmitting window (12) and then emitted vertically onto the surface of the workpiece (3) via the light-transmitting cavity (13) and the focusing lens (14). At the same time, the electrolytic power supply (2) is started and the cutter head body (1) is moved rightward at a set speed. At this time, the workpiece (3) corresponding to the lower portion of the liquid injection port (16) is removed under the synergistic action of electrochemistry, laser, and fluid. Step S3: When the cutter head body (1) reaches the end position according to the set path, the cutter head body (1) is moved in the reverse direction. At the same time, the right position of the two-position four-way solenoid valve (4-3) is switched to the working state. At this time, the electrolyte (11) enters the right liquid storage chamber (9) through the right liquid port (10) under the action of the electrolyte pump (4-1) and flows through the right flow channel (8). Then, a part of the electrolyte (11) flows to the gap between the cutter head bodies (1) through the liquid spray port (16). The other part of the electrolyte (11) flows from the left flow channel (7) to the left liquid storage chamber (6) under the action of the suction negative pressure of the suction pump (4-2) and is extracted through the left liquid port (5) and flows back to the electrolyte circulation system (4). In this process, the workpiece (3) corresponding to the lower side of the liquid spray port (16) is removed under the synergistic action of electrochemistry, laser and fluid. Step S4: According to the processing requirements, during the movement of the cutter head body (1), the working position of the two-position four-way solenoid valve (4-3) is continuously switched according to the principle of "moving right to the left position, moving left to the right position" to process the workpiece (3) until the set processing task is completed. At this time, the electrolytic power supply (2) and the electrolyte circulation system (4) are turned off, and the wire laser beam (15) is turned off to complete the processing.

Images