Waveguide laser electrolytic composite machining device and method

Abstract

The application belongs to the field of special composite machining, and more particularly relates to a waveguide laser electrolysis composite machining device and method, which comprises a laser, a CCD camera, a pulse power supply, and a reflector, a focusing mirror, a liquid supply system and a conductive nozzle arranged in sequence from top to bottom; the CCD camera is arranged above the reflector; the laser is arranged on one side of the reflector, and the emitted light is refracted by the reflector, then passes through the focusing mirror, the liquid supply system and the conductive nozzle in sequence, and irradiates on the surface of a part to be machined; the anode of the pulse power supply is connected to the part to be machined, and the cathode is connected to the conductive nozzle; the outer surface of the conductive nozzle is sleeved with a synchronous belt, and the conductive nozzle is connected to the driving shaft of a driving device through the synchronous belt. The application utilizes the difference in laser refractive index between the electrolyte and the low refractive layer to make the laser realize total reflection between the electrolyte and the low refractive layer, adopts an inert electrolyte, reduces the loss of laser energy in the propagation process, and realizes the maximization of laser energy.

Description

Technical Field

[0001] This invention belongs to the field of special composite processing, and more specifically, relates to a waveguide laser electrolytic composite processing device and method. Background Technology

[0002] Fuel nozzles are critical components in both automotive and aero engines. To meet design requirements such as uniform fuel atomization, the nozzle orifice has a small diameter, a large aspect ratio, and high precision and sidewall quality requirements, posing significant challenges to traditional small-hole machining methods. Mechanical drilling offers high precision and quality, but it is prone to tool breakage when machining small-diameter holes with a large aspect ratio (less than 1 mm), leading to the scrapping of the entire part. While electrical discharge machining (EDM) is highly efficient, it produces a thick remelted layer, affecting the performance of the nozzle orifice. Traditional laser machining also suffers from severe heat-affected zone (HAZ) residue, while the newly developed short-pulse laser faces challenges in chip removal and low processing efficiency when machining small-diameter holes with large aspect ratios.

[0003] For workpiece thinning and shaping, commonly used methods include mirror milling and chemical milling. However, these techniques generally suffer from problems such as complex structures, low processing efficiency, and difficulty in controlling material removal, becoming bottlenecks in the processing of precision aerospace storage tank components. Therefore, achieving deformation-free, high-efficiency, and precisely controllable material removal during the thinning and shaping of weak-rigidity storage tank components is of great significance for simplifying the processing flow and improving the quality and processing efficiency of finished components. Summary of the Invention

[0004] To address the challenges of high-precision, high-efficiency, and high-quality machining of small holes with large aspect ratios, as well as the problems of complex equipment structure, low processing efficiency, and difficulty in controlling material removal in current workpiece thinning and shaping processes, this invention proposes a waveguide laser-electrolytic composite machining technology, which combines water-guided laser machining, electrical discharge machining, and electrolytic machining into a waveguide laser-electrolytic composite machining device and method.

[0005] The technical solution adopted by the present invention to achieve the above objectives is: a waveguide laser electrolytic composite processing device, characterized in that it includes: a laser, a CCD camera, a pulse power supply, and a reflector, a focusing lens, a liquid supply system, and a conductive nozzle arranged sequentially from top to bottom;

[0006] The CCD camera is positioned above the reflector and is used to capture images of the laser spot and the conductive nozzle.

[0007] The laser is located on one side of the reflector. The emitted light is refracted by the reflector and then passes through the focusing lens, the liquid supply system, and the conductive nozzle in sequence before irradiating the surface of the part to be processed.

[0008] The anode of the pulse power supply is connected to the workpiece to be processed for electrolysis and electrical discharge machining; the cathode of the pulse power supply is connected to a conductive nozzle.

[0009] A timing belt is fitted on the outer surface of the conductive nozzle, and the conductive nozzle is connected to the drive shaft of the drive device through the timing belt, so that the conductive nozzle and the drive shaft can rotate synchronously.

[0010] The reflector is set at 45°, and the angle between the emission direction of the laser and the incident direction of the laser entering the focusing lens is 90°.

[0011] The angle between the emission direction of the laser and the field of view of the CCD camera is 90°.

[0012] The liquid supply system includes: a liquid supply device, a window mirror, a coupling cavity, and a sealing ring;

[0013] The coupling cavity is a closed cavity structure, and a window mirror is provided on the top surface of the coupling cavity, which is located directly below the focusing mirror;

[0014] The conductive nozzle is inserted into the bottom surface of the coupling cavity and is located directly below the window mirror; the joint between the conductive nozzle and the bottom surface of the coupling cavity is sealed by a sealing ring.

[0015] The liquid supply device is connected to the coupling cavity through a liquid supply pipeline and is used to provide electrolyte to the coupling cavity. The electrolyte flows out through a conductive nozzle.

[0016] The conductive nozzle has a hollow cylindrical structure and is made of a conductive material.

[0017] The conductive nozzle has a low refractive index layer on its inner surface, and a conductive slip ring is fitted around the conductive nozzle, rotating with the conductive nozzle. A brush is fixed to the outside of the conductive slip ring and is in contact with it; the brush is connected to the negative terminal of the pulse power supply via a wire.

[0018] The inner diameter of the conductive nozzle is not less than the diameter of the window mirror.

[0019] The refractive index of the low-refractive-index layer is less than that of the electrolyte.

[0020] The gap between the bottom surface of the conductive nozzle and the surface to be processed is 0.2mm to 2mm. The conductive nozzle rotates at a speed of less than 5r / s around its central axis during processing.

[0021] The laser is a pulsed laser, which produces laser wavelengths in the range of 300-1200nm and has an average output power of less than 1000W.

[0022] A drilling method for a waveguide laser electrolytic composite processing device includes the following steps:

[0023] 1) Positioning and fixing of the part to be processed: The waveguide laser composite processing device moves to the position of the hole to be processed and adjusts the axis of the conductive nozzle to be coaxial with the hole to be processed. The gap between the conductive nozzle and the inner wall surface of the part to be processed is adjusted to the set value.

[0024] 2) The liquid supply device supplies electrolyte at a fixed flow rate. The conductive nozzle starts to rotate synchronously under the drive of the drive device. The CCD camera is turned on, and the laser emits light at a low power. It is confirmed that the laser spot formed by the focusing lens is coupled with the electrolyte in the conductive nozzle. The pulse power supply starts to output pulse voltage, and the laser emits light at the set power.

[0025] 3) The material directly below the conductive nozzle is gradually removed, and the waveguide laser electrolytic composite processing device moves along the axis of the hole to be processed, keeping the gap between the conductive nozzle and the surface to be processed stable.

[0026] 4) After the conductive nozzle passes through the workpiece to be processed or the processing reaches the set depth, the laser stops emitting light and the pulse power supply stops outputting pulse voltage.

[0027] A milling method for a waveguide laser-electrolysis composite machining device includes the following steps:

[0028] 1) Positioning and fixing of the workpiece to be processed: The waveguide laser composite processing device moves to the surface of the workpiece to be processed and sets the running path of the conductive nozzle. The gap between the conductive nozzle and the surface of the workpiece to be processed is adjusted to the set value.

[0029] 2) The liquid supply device supplies electrolyte at a fixed flow rate. The conductive nozzle starts to rotate synchronously under the drive of the drive device. The CCD camera is turned on, and the laser emits light at a low power. It is confirmed that the laser spot formed by the focusing lens is coupled with the electrolyte in the conductive nozzle. The pulse power supply starts to output pulse voltage, and the laser emits light at the set power.

[0030] 3) The material directly below the conductive nozzle is gradually removed, and the waveguide laser electrolytic composite processing device moves radially along the surface of the workpiece to be processed, maintaining a stable gap between the conductive nozzle and the surface of the workpiece to be processed.

[0031] 4) After the workpiece machining allowance is completed, the laser stops emitting light, and at the same time, the pulse power supply stops outputting pulse voltage. The clamping device drives the conductive nozzle to the standby position, the conductive nozzle stops rotating, and the liquid supply device stops supplying liquid.

[0032] An insulating nozzle is installed on the conductive nozzle, and the insulating nozzle is installed at the end of the conductive nozzle to avoid discharge between the conductive nozzle and the workpiece and material removal.

[0033] The insulating nozzle is a non-metallic insulating material nozzle; the inner diameter of the insulating nozzle is not greater than the inner diameter of the conductive nozzle used in conjunction with it.

[0034] The present invention has the following beneficial effects and advantages:

[0035] 1. This invention utilizes the difference in refractive index between the electrolyte and the low-refractive-index layer to achieve total internal reflection of the laser between the electrolyte and the low-refractive-index layer. At the same time, the use of an inert electrolyte greatly reduces the loss of laser energy during propagation, thereby maximizing the laser energy involved in material removal.

[0036] 2. The waveguide laser-electrolysis composite drilling method proposed in this invention combines the advantages of water-guided laser processing, electrolytic processing, and electrical discharge machining. It leverages the advantage of water-guided laser processing not generating a heat-affected zone and uses laser processing to make the bottom structure of the hole rougher, increasing the contact area between the material to be processed and the electrolyte, thereby further improving the overall drilling efficiency.

[0037] 3. In this invention, while the bottom of the hole in the workpiece is processed by water-guided laser and electrolyte processing, the conductive nozzle can also perform electrical discharge machining on individual protrusions on the sidewall of the already processed small hole, further improving the quality of the sidewall of the small hole, and ultimately achieving high-quality, high-efficiency, and high-precision processing of small holes with a large depth-to-diameter ratio.

[0038] 4. The milling method proposed in this invention combines the advantages of electrolytic machining and laser machining. By leveraging the high degree of freedom in the removal area of ​​the laser scanning machining method, high-precision material removal of approximately rectangular material removal sections is achieved.

[0039] 5. When using the milling method, an insulating nozzle is installed outside the conductive nozzle. This increases the degree of freedom in the electrolytic machining area and avoids electrode discharge machining, thereby improving machining accuracy.

[0040] 6. This invention achieves the shaping and thinning of weak stiffness structures in an approximately rectangular removal area by combining electrolytic machining and high-degree-of-freedom laser scanning machining, which can effectively improve the shaping and machining efficiency and accuracy of weak stiffness parts. Attached Figure Description

[0041] Figure 1 This is a schematic diagram of a waveguide laser electrolysis composite drilling device provided in an embodiment of the present invention;

[0042] In this designation, 1 is the laser, 2 is the reflector, 3 is the focusing lens, 4 is the window mirror, 5 is the coupling cavity, 6 is the sealing ring, 7 is the low refractive index layer, 8 is the conductive nozzle, 9 is the CCD camera, 10 is the liquid supply device, 11 is the pulse power supply, 12 is the laser beam, 13 is the electrolyte, and 14 is the driving device.

[0043] Figure 2This is a flowchart of a waveguide laser electrolytic composite drilling method provided in an embodiment of the present invention;

[0044] Figure 3 This is a schematic diagram of a waveguide laser electrolytic composite milling device provided in an embodiment of the present invention;

[0045] Figure 4 This is a flowchart of a waveguide laser electrolytic composite milling method provided in an embodiment of the present invention;

[0046] Figure 5 This is a schematic diagram of a rectangular material removal section formed by superimposing the electrolytic machining removal section and the laser machining removal section according to an embodiment of the present invention. Detailed Implementation

[0047] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention. Furthermore, the technical features involved in the various embodiments of this invention described below can be combined with each other as long as they do not conflict with each other.

[0048] like Figure 1 As shown, a waveguide laser electrolytic composite processing device is characterized by comprising: a laser 1, a CCD camera 9, a pulse power supply 11, and a reflector 2, a focusing lens 3, a liquid supply system, and a conductive nozzle 8 arranged sequentially from top to bottom.

[0049] The CCD camera 9 is positioned above the reflector 2 and is used to capture images of the laser spot and the conductive nozzle 8.

[0050] Laser 1 is located on one side of the reflector. The emitted light is refracted by the reflector 2 and then passes through the focusing lens 3, the liquid supply system, and the conductive nozzle 8 in sequence, and then irradiates the surface of the part to be processed.

[0051] The anode of the pulse power supply 11 is connected to the workpiece to be processed and is used for electrolysis and electrical discharge machining; the cathode of the pulse power supply 11 is connected to the conductive nozzle 8.

[0052] A synchronous belt is fitted on the outer surface of the conductive nozzle 8. The conductive nozzle 8 is connected to the drive shaft of the drive device through the synchronous belt, so that the conductive nozzle 8 and the drive shaft can rotate synchronously.

[0053] The reflector 2 is set at 45°, and the angle between the emission direction of the laser 1 and the incident direction of the laser entering the focusing lens 3 is 90°.

[0054] The angle between the emission direction of laser 1 and the field of view of CCD camera 9 is 90°.

[0055] The liquid supply system includes: a liquid supply device 10, a window mirror 4, a coupling cavity 5, and a sealing ring 6;

[0056] The coupling cavity 5 is a closed cavity structure, and a window mirror 4 is provided on the top surface of the coupling cavity 5. The window mirror 4 is located directly below the focusing mirror 3.

[0057] The conductive nozzle 8 is inserted into the bottom surface of the coupling cavity 5 and is located directly below the window mirror 4; the joint between the conductive nozzle and the bottom surface of the coupling cavity 5 is sealed by a sealing ring 6.

[0058] The liquid supply device 10 is connected to the coupling cavity 5 through a liquid supply pipeline and is used to provide electrolyte 13 to the coupling cavity 5. The electrolyte 13 flows out through the conductive nozzle 8.

[0059] The conductive nozzle 8 has a hollow cylindrical structure and is made of a conductive material.

[0060] A low-refractive-index layer 7 is provided on the inner surface of the conductive nozzle 8, and a conductive slip ring is provided on the outer sleeve of the conductive nozzle 8. A brush is fixed outside the conductive slip ring and is in contact with it. The brush is connected to the negative terminal of the pulse power supply 11 through a wire.

[0061] The inner diameter of the conductive nozzle 8 is not less than the diameter of the window mirror 4.

[0062] The refractive index of the low-refractive-index layer 7 is less than that of the electrolyte 13.

[0063] The gap between the bottom surface of the conductive nozzle 8 and the surface to be processed is 0.2mm to 2mm.

[0064] like Figure 2 The diagram shown is a flowchart of a waveguide laser electrolytic composite drilling method provided by an embodiment of the present invention. The method of the present invention includes the following steps:

[0065] 1) Positioning and fixing of the part to be processed: The waveguide laser composite processing device moves to the position of the hole to be processed and adjusts the axis of the conductive nozzle 8 to be coaxial with the hole to be processed. The gap between the conductive nozzle 8 and the inner wall surface of the part to be processed is adjusted to the set value.

[0066] 2) The liquid supply device 10 supplies electrolyte 13 at a fixed flow rate. The conductive nozzle 8 starts to rotate synchronously under the drive of the drive device. The CCD camera 9 is turned on. The laser 1 emits light at a low power. It is confirmed that the laser spot formed by the focusing lens 3 is coupled with the electrolyte of the conductive nozzle 8. The pulse power supply 11 starts to output pulse voltage. The laser 1 emits light at the set power.

[0067] 3) The material directly below the conductive nozzle 8 is gradually removed, and the waveguide laser electrolytic composite processing device moves along the axis of the hole to be processed, keeping the gap between the conductive nozzle 8 and the surface to be processed stable.

[0068] 4) After the conductive nozzle 8 passes through the workpiece to be processed or is processed to the set depth, the laser 1 stops emitting light and the pulse power supply 11 stops outputting pulse voltage.

[0069] like Figure 3 The diagram shown is a flowchart of a waveguide laser-electrolytic composite milling method provided by an embodiment of the present invention. The milling method for a waveguide laser-electrolytic composite machining device includes the following steps:

[0070] First, an insulating nozzle is installed on the conductive nozzle 8. The insulating nozzle is installed at the end of the conductive nozzle 8 to avoid discharge between the conductive nozzle 8 and the workpiece and to prevent material removal.

[0071] The insulating nozzle is made of non-metallic insulating material; the inner diameter of the insulating nozzle is not greater than the inner diameter of the conductive nozzle 8 used in conjunction with it.

[0072] 1) Positioning and fixing of the workpiece to be processed: The waveguide laser composite processing device moves to the surface of the workpiece to be processed and sets the running path of the conductive nozzle 8. The gap between the conductive nozzle 8 and the surface of the workpiece to be processed is adjusted to the set value.

[0073] 2) The liquid supply device 10 supplies electrolyte 13 at a fixed flow rate. The conductive nozzle 8 starts to rotate synchronously under the drive of the drive device. The CCD camera 9 is turned on. The laser 1 emits light at a low power. It is confirmed that the laser spot formed by the focusing lens 3 is coupled with the electrolyte of the conductive nozzle 8. The pulse power supply 11 starts to output pulse voltage. The laser 1 emits light at the set power.

[0074] 3) The material directly below the conductive nozzle 8 is gradually removed, and the waveguide laser electrolytic composite processing device moves radially along the hole to be processed, keeping the gap between the conductive nozzle 8 and the surface to be processed stable.

[0075] 4) After the machining allowance of the workpiece is completed, the laser 1 stops emitting light, and at the same time the pulse power supply stops outputting pulse voltage. The clamping device drives the laser electrolytic composite machining head to the standby position, the conductive nozzle 8 stops rotating, and the liquid supply device 10 stops supplying liquid.

[0076] Example 1: For drilling holes in a workpiece, the conductive nozzle 8 is not equipped with an insulating nozzle;

[0077] In this embodiment, for the drilling method of the workpiece, laser 1 is used, which can generate a laser with a wavelength of 532nm and a pulse width of 150nanoseconds, and the laser output power is adjustable from 0-250W.

[0078] The reflector 2, in conjunction with the focusing mirror 3, can focus the laser generated by the laser 1 into a small diameter spot.

[0079] Window mirror 4 allows laser light with a wavelength of 532nm to pass through.

[0080] The coupling cavity 5, together with the window mirror 4, the sealing ring 6 and the conductive nozzle 8, can form a sealed cavity, allowing the electrolyte 13 to flow in from the liquid supply system 10 and be sprayed out from the conductive nozzle 8.

[0081] The conductive nozzle 8 is made of copper alloy, with an inner diameter of 0.6 mm and an outer diameter of 1 mm. It is connected to the pulse power supply 11 through a conductive slip ring and can rotate around the central axis.

[0082] The low refractive index layer 7 is a fluoride coating with a thickness of 100 μm, which is applied to the inner surface of the conductive nozzle 8 by vapor deposition.

[0083] The CCD camera 9 can image laser spots and conductive nozzles;

[0084] The electrolyte supply system can provide passivated electrolyte at a flow rate of 100 L / H.

[0085] The pulse power supply 11 has its anode connected to a weak rigidity component and its cathode connected to a conductive nozzle. The applied pulse voltage is 30-40V.

[0086] The specific implementation method is as follows:

[0087] (1) The fixture is used to position and fix the part to be processed. The clamping mechanism of the processing equipment drives the waveguide laser composite processing head to the position of the hole to be processed and adjusts the axis of the conductive nozzle to be coaxial with the hole to be processed. The gap between the conductive nozzle 8 and the surface to be processed is adjusted to 300um.

[0088] (2) The liquid supply device 10 starts to supply passivating electrolyte 13 at a flow rate of 5L / H. The conductive nozzle 8 starts to rotate at a speed of 2r / s under the drive of the drive device 14. The pulse power supply 11 starts to output high-frequency pulse voltage, the laser 1 emits light, and the waveguide laser electrolytic composite processing begins.

[0089] (3) As the water-guided laser, electrical discharge, and electrolytic machining proceed, the material directly below the conductive nozzle 8 is gradually removed. The clamping mechanism drives the waveguide laser electrolytic composite machining head to move along the axis of the hole to be machined, keeping the gap between the conductive nozzle and the surface to be machined stable at 300um.

[0090] (4) After the conductive nozzle 8 passes through the material to be processed, the laser 1 stops emitting light and the pulse power supply 11 stops outputting pulse voltage.

[0091] (5) The clamping mechanism drives the waveguide laser electrolytic composite machining head to exit the machined hole along the hole axis and start machining the next hole. Repeat steps (2) to (4). After all holes are machined, the conductive nozzle stops rotating and the liquid supply device stops supplying liquid, thus completing the machining.

[0092] Example 2: For milling the workpiece, an insulating nozzle is fitted over the outer end of the conductive nozzle 8; specifically as follows... Figure 3 As shown. In this embodiment, for the milling method of workpiece thinning and shaping, the present invention adopts the following parameters:

[0093] Laser 1 can generate a laser with a wavelength of 532nm and a pulse width of 200 nanoseconds, and the laser output power is adjustable from 0-200W.

[0094] The reflector 2, in conjunction with the focusing lens 3, can focus the laser generated by the laser 1 into a small-diameter spot, and the spot scanning range is a circle with a diameter of 10mm, with a maximum scanning speed of 50mm / s.

[0095] Window mirror 4 allows laser light with a wavelength of 532nm to pass through.

[0096] The coupling cavity 5, together with the window mirror 4, the sealing ring 6 and the conductive nozzle 8, forms a sealed cavity, allowing the electrolyte 12 to flow in from the liquid supply system 9 and be sprayed out from the conductive nozzle 8.

[0097] The conductive nozzle 8 is made of copper alloy and has an inner diameter of 5mm. It is connected to the pulse power supply 10 through a conductive slip ring and can rotate around the central axis.

[0098] An insulated nozzle, made of nylon, is threaded onto the conductive nozzle 8. It has an inner diameter of 5mm and a distance of 0.3mm between its end and the surface to be processed.

[0099] The liquid supply device 10 can provide passivated electrolyte with a maximum electrolyte flow rate of 500 L / H.

[0100] The pulse power supply 11 has its anode connected to a weak rigidity component and its cathode connected to a conductive nozzle. The applied pulse voltage is 30-40V.

[0101] For this embodiment, as Figure 4 As shown, the method is as follows:

[0102] (1) Use conformal fixtures to fix the workpiece and import the machining allowance distribution data into the machining trajectory generation software. The trajectory generation software generates the milling trajectory based on the machining allowance and the cross-sectional area removed in a single scan.

[0103] (2) The liquid supply device 10 supplies electrolyte 13 at a flow rate of 300L / H. The conductive nozzle 8 drives the insulating nozzle to start rotating at a speed of 1r / s. The clamping device drives the device to move to the starting point of the trajectory.

[0104] (3) The pulse power supply 11 applies a pulse voltage between the conductive nozzle 8 and the workpiece to be processed. Simultaneously, the CCD camera 9, laser 1, and laser 1 emit light are activated. The coupling between the laser spot formed by the focusing lens 3 and the electrolyte in the conductive nozzle 8 is confirmed. Figure 3 As shown.

[0105] 4) The material directly below the conductive nozzle 8 is gradually removed, and the waveguide laser electrolytic composite processing device moves radially along the surface of the workpiece to be processed, keeping the gap between the conductive nozzle 8 and the surface of the workpiece to be processed stable.

[0106] By adjusting the sum of the laser removal section 16 and the electrolytic machining removal section 15 to a rectangular material removal section, high-precision and controllable removal of the workpiece is achieved, with the processing effect as follows: Figure 5 As shown (insulating nozzle omitted here);

[0107] 5) After the workpiece machining allowance is completed, the laser 1 stops emitting light, and at the same time the pulse power supply stops outputting pulse voltage. The clamping device drives the laser electrolytic composite machining head to the standby position, the conductive nozzle 8 stops rotating, and the liquid supply device 10 stops supplying liquid.

[0108] Finally, it should be noted that the above specific embodiments are only used to illustrate the technical solutions of the present invention and not to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A waveguide laser electrolytic composite processing device, characterized in that, include: Laser (1), CCD camera (9), pulse power supply (11) and, from top to bottom, reflector (2), focusing lens (3), liquid supply system, and conductive nozzle (8). The CCD camera (9) is located above the reflector (2) and is used to acquire images of the laser spot and the conductive nozzle (8). The laser (1) is located on one side of the reflector. The emitted light is refracted by the reflector (2) and then passes through the focusing lens (3), the liquid supply system, and the conductive nozzle (8) in sequence, and then irradiates the surface of the part to be processed. The reflector (2) is set at 45°, and the angle between the emission direction of the laser (1) and the incident direction of the laser entering the focusing lens (3) is 90°. The angle between the emission direction of the laser (1) and the field of view of the CCD camera (9) is 90°; The anode of the pulse power supply (11) is connected to the workpiece to be processed for electrolysis and electrical discharge machining; the cathode of the pulse power supply (11) is connected to the conductive nozzle (8). The conductive nozzle (8) is fitted with a synchronous belt on its outer surface. The conductive nozzle (8) is connected to the drive shaft of the drive device through the synchronous belt, so that the conductive nozzle (8) and the drive shaft can rotate synchronously. The conductive nozzle (8) has a hollow cylindrical structure and is made of conductive material. The inner surface of the conductive nozzle (8) is provided with a low refractive index layer (7), and a conductive slip ring is provided on the outer sleeve of the conductive nozzle. The conductive slip ring rotates with the conductive nozzle (8). A brush is fixed outside the conductive slip ring and contacts it. The brush is connected to the negative terminal of the pulse power supply (11) through a wire. The refractive index of the low refractive index layer (7) is less than that of the electrolyte (13); The liquid supply system includes: a liquid supply device (10), a window mirror (4), a coupling cavity (5), and a sealing ring (6). The coupling cavity (5) is a closed cavity structure. The top surface of the coupling cavity (5) is provided with a window mirror (4), which is located directly below the focusing mirror (3). The conductive nozzle (8) is inserted into the bottom surface of the coupling cavity (5) and is located directly below the window mirror (4); the joint between the conductive nozzle and the bottom surface of the coupling cavity (5) is sealed by a sealing ring (6); The liquid supply device (10) is connected to the coupling cavity (5) through a liquid supply pipeline and is used to provide electrolyte (13) to the coupling cavity (5). The electrolyte (13) flows out through a conductive nozzle (8). The inner diameter of the conductive nozzle (8) is not less than the diameter of the window mirror (4); A drilling method based on a waveguide laser electrolysis composite processing device includes the following steps: 1) Positioning and fixing of the part to be processed: the waveguide laser composite processing device moves to the position of the hole to be processed and adjusts the axis of the conductive nozzle (8) to be coaxial with the hole to be processed. The gap between the conductive nozzle (8) and the inner wall surface of the part to be processed is adjusted to the set value. 2) The liquid supply device (10) supplies electrolyte (13) at a fixed flow rate. The conductive nozzle (8) starts to rotate synchronously under the drive of the drive device. The CCD camera (9) is turned on. The laser (1) emits light at a low power. It is confirmed that the laser spot formed by the focusing lens (3) is coupled with the electrolyte of the conductive nozzle (8). The pulse power supply (11) starts to output pulse voltage. The laser (1) emits light at the set power. 3) The material directly below the conductive nozzle (8) is gradually removed, and the waveguide laser electrolytic composite processing device moves along the axis of the hole to be processed, keeping the gap between the conductive nozzle (8) and the surface to be processed stable. 4) After the conductive nozzle (8) passes through the workpiece to be processed or is processed to the set depth, the laser (1) stops emitting light and the pulse power supply (11) stops outputting pulse voltage.

2. The waveguide laser electrolysis composite processing device according to claim 1, characterized in that, The gap between the bottom surface of the conductive nozzle (8) and the surface to be processed is 0.2mm to 2mm; The conductive nozzle (8) rotates at a speed of less than 5 r / s around its central axis during processing.

3. The milling method of the waveguide laser-electrolysis composite machining device according to claim 1, characterized in that, Includes the following steps: 1) Positioning and fixing of the workpiece to be processed: the waveguide laser composite processing device moves to the surface of the workpiece to be processed and sets the running path of the conductive nozzle (8). The gap between the conductive nozzle (8) and the surface of the workpiece to be processed is adjusted to the set value. 2) The liquid supply device (10) supplies electrolyte (13) at a fixed flow rate. The conductive nozzle (8) starts to rotate synchronously under the drive of the drive device. The CCD camera (9) is turned on. The laser (1) emits light at a low power. It is confirmed that the laser spot formed by the focusing lens (3) is coupled with the electrolyte of the conductive nozzle (8). The pulse power supply (11) starts to output pulse voltage. The laser (1) emits light at the set power. 3) The material directly below the conductive nozzle (8) is gradually removed, and the waveguide laser electrolytic composite processing device moves radially along the surface of the workpiece to be processed, keeping the gap between the conductive nozzle (8) and the surface of the workpiece to be processed stable. 4) After the workpiece machining allowance is completed, the laser (1) stops emitting light, and at the same time the pulse power supply stops outputting pulse voltage. The clamping device drives the conductive nozzle (8) to move to the standby position, the conductive nozzle (8) stops rotating, and the liquid supply device (10) stops supplying liquid.

4. The milling method of the waveguide laser-electrolysis composite machining device according to claim 3, characterized in that, An insulating nozzle is installed on the conductive nozzle (8), and the insulating nozzle is installed at the end of the conductive nozzle (8) to avoid discharge between the conductive nozzle (8) and the workpiece and material removal; The insulating nozzle is a non-metallic insulating material nozzle; the inner diameter of the insulating nozzle is not greater than the inner diameter of the conductive nozzle (8) used in conjunction with it.

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