Micro-fluidic foaming flushing liquid electric arc machining device and machining method thereof

Abstract

According to the micro-fluidic foaming flushing liquid electric arc machining device and method, bubble bodies with controllable particle sizes are generated through a micro-fluidic chip, and the mixing degree and density of electrolyte and the bubble bodies are controlled through dynamic screening; further, the finally obtained foaming electrolyte can intensively and uniformly perform cavitation erosion impact on a machining surface with proper impact force when being sprayed to the machining surface, redundant electric corrosion products can be effectively struck away, remelting layers on the surfaces of a workpiece and an electrode are removed, so that adhesion and defects of the electrode and the surface of the workpiece are reduced, and the service life of the workpiece is prolonged. The processing efficiency and the surface smoothness of a processing surface are improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of arc machining, and particularly relates to a microfluidic foaming flushing arc machining device and a machining method thereof. Background Art

[0002] Arc machining is a commonly used electrochemical machining method, in which an arc is generated by an electrode, and in cooperation with an electrolyte sprayed onto the machining surface of a workpiece, the machining surface of the workpiece is melted electrochemically for machining. However, during the arc machining process, the arc will generate very high heat at the machining surface of the workpiece, and a remelting layer will accumulate on both the electrode and the machining surface of the workpiece. Once the remelting layer accumulates too thickly, it will cause the electrode to adhere to the machining surface of the workpiece and affect the surface finish of the machining surface of the workpiece.

[0003] In the prior art, in order to avoid the accumulation of the remelting layer, gas is introduced into the electrolyte to form bubbles in the electrolyte. The cavitation phenomenon generated by the impact of the bubbles on the machining surface can blow away some of the excess electro-erosion products generated during the arc machining process, thereby avoiding the over-thick accumulation of the remelting layer. However, the above prior art has the following problems: That is, the prior art simply introduces gas into the electrolyte, resulting in uncontrollable bubble diameters and densities in the final electrolyte. If the bubble diameters in the electrolyte are too large and the densities are too large, the impact of the bubbles on the machining surface will be too large, which will instead affect the quality of the machining surface; if the bubble diameters in the electrolyte are too small and the densities are too small, the impact force of the bubbles on the machining surface will be insufficient, resulting in the over-thick accumulation of the remelting layer. Moreover, in the prior art, gas is directly introduced into the electrolyte, resulting in insufficient mixing of the gas in the electrolyte. During the process of spraying the electrolyte onto the machining surface, some bubbles will overflow from the electrolyte before impacting the machining surface, thereby affecting the quality and efficiency of the arc machining.

[0004] Therefore, in view of the above deficiencies in the existing foaming arc machining technology, the present invention discloses a microfluidic foaming flushing arc machining device and a machining method thereof. Summary of the Invention

[0005] The present invention discloses a microfluidic foaming flushing arc machining device and a machining method thereof. By generating a bubble body with controllable particle diameters through a microfluidic chip, and controlling the mixing degree and density of the electrolyte and the bubble body through dynamic screening, it is ensured that when the finally obtained foaming electrolyte is sprayed onto the machining surface, it can perform cavitation impact on the machining surface concentratedly, uniformly, and with an appropriate impact force, which can effectively blow away the excess electro-erosion products, remove the remelting layer on the surfaces of the workpiece and the electrode, thereby reducing the adhesion and defects on the surfaces of the electrode and the workpiece, and improving the machining efficiency and the surface finish of the machining surface.

[0006] The present invention is achieved through the following technical solutions: A microfluidic foaming flushing arc machining device includes a tool electrode for generating an arc. At least one set of electrolyte distribution devices is arranged around the tool electrode. The electrolyte distribution device includes at least one sieve part, and the sieve part includes a liquid inlet channel. At least one set of microfluidic foaming devices is arranged on one side of the liquid inlet channel. The microfluidic foaming device is used to generate gas bubbles with controllable particle sizes. The sieve part is used to mix the electrolyte and the gas bubbles and screen and control the density of the gas bubbles. At least one set of nozzles that can linearly move and yaw relative to the workpiece is arranged at the outlet end of the sieve part.

[0007] The electrolyte distribution device is used to spray the prepared electrolyte onto the machining surface of the workpiece. An arc is generated by the tool electrode, and the machining surface of the workpiece can be arc machined in cooperation with the electrolyte. During the process of supplying the electrolyte by the electrolyte distribution device, gas bubbles are generated by the microfluidic foaming device at the same time, and the particle size of the generated gas bubbles can be controlled by the microfluidic foaming device. The gas bubbles and the electrolyte enter the sieve part for uniform mixing and screening, so that the electrolyte is evenly filled with gas bubbles. At the same time, the particle size of the gas bubbles is screened by the sieve part, and then the density of the gas bubbles in the electrolyte is regulated. Through the cooperation of the electrolyte distribution device and the microfluidic foaming device, the electrolyte containing gas bubbles can be sprayed onto the machining surface of the workpiece, and the particle size of the gas bubbles and the density of the gas bubbles in the electrolyte can be regulated according to the real-time machining quality of the workpiece surface. Furthermore, it is ensured that the gas bubbles can be more concentrated in the arc machining area for sufficient cavitation erosion to blow away the electro-erosion products during the arc machining process, and then remove the remelted layer on the surfaces of the workpiece and the tool electrode, thereby reducing the adhesion and defects on the surfaces of the tool electrode and the workpiece and improving the arc machining efficiency and the surface finish of the workpiece.

[0008] To better implement the present invention, further, the microfluidic foaming device includes a distribution plate arranged in layers in sequence. A plurality of microfluidic chips are evenly arranged on the distribution plate along the circumferential direction, and the particle sizes of the gas bubbles finally output by the microfluidic chips inside different layers of the distribution plate are different. An inlet liquid channel and an inlet gas channel are arranged on the distribution plate. The inlet liquid channel is connected to the liquid inlet end of the microfluidic chip, the inlet gas channel is connected to the gas inlet end of the microfluidic chip, and the gas bubble outlet of the microfluidic chip is connected to one side of the inlet liquid channel. The inlet liquid channel of the distribution plate is connected to the liquid distribution device, and the inlet gas channel of the distribution plate is connected to the gas distribution device. The liquid distribution device is configured to be able to adjust the flow rate, pressure, and flow velocity of the inlet liquid, and the gas distribution device is configured to be able to adjust the flow rate, pressure, and flow velocity of the inlet gas.

[0009] To better implement the present invention, further, a plurality of inlet gas channels are arranged on one side of the inlet liquid channel, and a variable-diameter bubble generation cavity is arranged between the intersections of the inlet gas channels and the inlet liquid channel.

[0010] To better implement the present invention, further, the bubble body outlet of the microfluidic chip is connected to a transparent bubble body distribution chip. The interior of the transparent bubble body distribution chip is provided with a flat inner cavity, and the thickness of the flat inner cavity is between the diameter of a single bubble body and the sum of the diameters of two bubble bodies. The outlet end of the transparent bubble body distribution chip is connected to one side of the liquid inlet flow channel, and at least one set of visual detection devices is arranged on one side of the transparent bubble body distribution chip.

[0011] To better implement the present invention, further, a number of installation slots are evenly arranged along the circumference on the distribution disk. The microfluidic chip is clamped inside the installation slots. The inlet end of the installation slot is provided with a liquid inlet flow channel and a gas inlet flow channel, and the outlet end of the installation slot is connected to the transparent bubble body distribution chip.

[0012] To better implement the present invention, further, a screening cavity is arranged inside the screening part. A fixed disk and a rotating disk are arranged inside the screening cavity, and screening holes are arranged in alignment on both the fixed disk and the rotating disk. The rotating disk can rotate relative to the fixed disk to adjust the alignment area of the screening holes.

[0013] To better implement the present invention, further, a linear feeding device is arranged on one side of the nozzle. A swinging device is arranged on the feeding end of the linear feeding device, and a nozzle is arranged on the swinging end of the swinging device.

[0014] To better implement the present invention, further, the swinging device includes a mounting seat, an electromagnet, a magnet, and a swinging seat. An arc-shaped inner cavity is arranged inside the mounting seat. The center of the bottom of the swinging seat is provided with a nozzle, and the bottom of the swinging seat in the area around the nozzle is in sliding fit with the arc-shaped inner cavity. A number of magnets are arranged along the circumference on the outer side of the swinging seat, and electromagnets are arranged on the inner wall of the mounting seat corresponding to the magnets.

[0015] To better implement the present invention, further, a control system is also included. The control system is configured to regulate the particle size of the bubble bodies generated by the microfluidic foaming device, the control system is configured to control the bubble density after the screening part mixes the electrolyte and the bubble bodies, and the control system is configured to control the linear distance and deflection angle of the nozzle relative to the workpiece processing surface.

[0016] A microfluidic foaming flushing arc machining method, implemented based on a microfluidic foaming flushing arc machining device, includes the following steps: Step 1: Deliver electrolyte to the nozzle through the liquid inlet flow channel within the first time interval. Keep the microfluidic foaming device closed within the first time interval, generate an arc with the tool electrode to machine the workpiece, and spray the electrolyte onto the processing surface of the workpiece with predetermined parameters through the nozzle. Step 2: After the first time interval, the microfluidic foaming device is turned on, and the microfluidic foaming device transports the generated bubbles to the screening part. The control system controls the screening part to evenly mix the bubbles with the electrolyte and screen the particle size of the bubbles to form a foaming electrolyte with a specific bubble density. Step 3: According to the diffusion degree of bubbles in the foaming electrolyte on the workpiece processing surface, the control system controls the microfluidic foaming device to adjust the particle size of the bubbles, and controls the bubble density of the foaming electrolyte through the screening part; Step 4: According to the accumulation degree of the remelted layer on the tool electrode and the workpiece surface, the control system controls the linear spacing and deflection angle of the nozzle relative to the workpiece processing surface to control the thickness of the remelted layer within the calibration range until the workpiece processing is completed. Compared with the prior art, the present invention has the following advantages and beneficial effects: The present invention generates bubbles with controllable particle size and density through a microfluidic foaming device, and transports the bubbles mixed with electrolyte to an electrolyte distribution device, thereby ensuring that the density of bubbles in the finally formed foaming electrolyte is appropriate and the bubble particle size is moderate, and the electrolyte distribution device is used to control the spacing and deflection angle between the tool electrode and the workpiece processing surface, thereby ensuring that the foaming electrolyte can be sprayed onto the processing surface more evenly and concentratedly, avoiding premature dispersion of bubbles, thereby ensuring that the finally obtained foaming electrolyte can be concentrated, uniform, and have appropriate impact force when sprayed onto the processing surface. Cavitation impact on the processing surface can be performed, and excess electro-etching products can be effectively knocked off, and the remelting layer on the surface of the workpiece and the electrode can be removed, thereby reducing adhesion and defects between the electrode and the workpiece surface, and improving processing efficiency and the surface finish of the processing surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Schematic diagram of the microfluidic foaming and flushing arc processing device; Figure 2 Schematic diagram of the structure of the microfluidic chip; Figure 3 is a schematic diagram of the structure of the swing device; Figure 4 is a schematic diagram of the structure of the distribution plate; Figure 5 It is a structural schematic diagram of the screening part.

[0018] Wherein: 1 - tool electrode; 2 - electrolyte distribution device; 3 - microfluidic foaming device; 4 - vision detection device; 21 - sieve section; 22 - liquid inlet channel; 23 - nozzle; 24 - linear feeding device; 25 - swing device; 31 - distribution plate; 32 - microfluidic chip; 33 - transparent bubble body distribution chip; 100 - liquid inlet channel; 200 - air inlet channel; 300 - variable-diameter bubble generation chamber; 211 - fixed plate; 212 - rotating plate; 251 - mounting seat; 252 - electromagnet; 253 - magnet; 254 - swing seat. Detailed implementation mode

[0019] Example 1: This example discloses a microfluidic foaming and flushing arc machining device. As Figure 1 shown, it includes a tool electrode 1 for generating an arc and a control system. At least one group of electrolyte distribution devices 2 are arranged around the tool electrode 1. The electrolyte distribution device 2 includes at least one sieve section 21, and the sieve section 21 includes a liquid inlet channel 22. At least one group of microfluidic foaming devices 3 are arranged on one side of the liquid inlet channel 22. The microfluidic foaming device 3 is used to generate bubble bodies with controllable particle sizes. The sieve section 21 is used to mix the electrolyte and the bubble bodies and perform screening control on the density of the bubble bodies. At least one group of nozzles 23 that can linearly move and swing relative to the workpiece are arranged at the outlet end of the sieve section 21. The control system is configured to regulate the particle size of the bubble bodies generated by the microfluidic foaming device 3, the control system is configured to control the bubble density after the sieve section 21 mixes the electrolyte and the bubble bodies, and the control system is configured to control the linear distance and deflection angle of the nozzle 23 relative to the machining surface of the workpiece. The liquid inlet channel 22 is connected to an electrolyte supply tank, and a flow control valve and a flow meter are arranged on the liquid inlet channel 22 for monitoring and controlling the flow rate of the electrolyte in the liquid inlet channel 22 in real time. The liquid inlet channel 22 is connected to the sieve section 21. The liquid inlet channel 22 introduces the electrolyte into the sieve section 21. At the same time, the sieve section 21 is connected to the outlet end of the microfluidic foaming device 3. The bubble bodies generated by the microfluidic foaming device 3 enter the sieve section 21 and are fully mixed with the electrolyte to form a foaming electrolyte containing bubble bodies.

[0020] At the same time, the sieve section 21 screens the bubble bodies in the foaming electrolyte, making the distribution of the bubble bodies in the electrolyte more uniform and controlling the density of the bubble bodies in the electrolyte. The microfluidic foaming device 3 introduces a liquid phase and a gas phase to form dense bubble bodies, and the particle size of the bubble bodies can be controlled by the microfluidic foaming device 3.

[0021] The control system is used to collect the stacking thickness of the remelting layer at the workpiece machining surface in real time. By taking pictures of the stacking thickness at the remelting layer and identifying the taken images, the current stacking situation of the remelting layer is obtained. The control system adjusts the microfluidic foaming device 3 in real time according to the stacking situation of the remelting layer to regulate the particle size of the gas bubbles, adjusts the flow rate of the electrolyte supplied by the electrolyte distribution device 2 in real time, and adjusts the gas bubble density after the screening part 21 screens and distributes the foaming electrolyte in real time. Finally, it is ensured that the foaming electrolyte sprayed onto the workpiece machining surface can surround the tool electrode and impact the workpiece machining surface at an appropriate angle and impact force, so as to blow away the electro-erosion products during the arc machining process, and then remove the remelting layer on the surfaces of the workpiece and the tool electrode, thereby reducing the adhesion and defects on the surfaces of the tool electrode and the workpiece, and improving the arc machining efficiency and the surface finish of the workpiece.

[0022] Embodiment 2: This embodiment discloses a microfluidic foaming and flushing arc machining device, which is further optimized on the basis of Embodiment 1, such as Figure 1 and Figure 4 shown. The microfluidic foaming device 3 includes a distribution plate 31 arranged in layers in sequence. A number of microfluidic chips 32 are evenly arranged on the circumference of the distribution plate 31, and the particle sizes of the gas bubbles finally output by the microfluidic chips 32 inside the distribution plates 31 at different levels are different. An inlet liquid channel 100 and an inlet gas channel 200 are arranged on the distribution plate 31. The inlet liquid channel 100 is connected to the liquid inlet end of the microfluidic chip 32, the inlet gas channel 200 is connected to the gas inlet end of the microfluidic chip 32, and the gas bubble outlet of the microfluidic chip 32 is connected to one side of the inlet liquid channel 22. The inlet liquid channel 100 of the distribution plate 31 is connected to the liquid distribution device, and the inlet gas channel 200 of the distribution plate 31 is connected to the gas distribution device. The liquid distribution device is configured to be able to adjust the flow rate, pressure, and flow velocity of the inlet liquid, and the gas distribution device is configured to be able to adjust the flow rate, pressure, and flow velocity of the inlet gas.

[0023] Different dispensing discs 31 are used to quickly install microfluidic chips 32 of different specifications. The microfluidic chips 32 of different specifications can generate gas bubbles of different particle sizes. A number of microfluidic chips 32 can be circumferentially installed on each dispensing disc 31, and a gas phase and a liquid phase can be simultaneously introduced into the number of microfluidic chips 32 through the liquid inlet channel 100 and the gas inlet channel 200, so as to realize the synchronous and efficient generation of gas bubbles by the number of microfluidic chips 32. The liquid dispensing device includes a liquid flow regulating valve and a liquid pressure regulating valve. The flow rate, pressure and flow velocity of the liquid phase can be real-time regulated through the liquid flow regulating valve and the liquid pressure regulating valve, so as to cooperate with the microfluidic chip 32 to generate gas bubbles of different particle sizes. The gas dispensing device includes a gas flow regulating valve and a gas pressure regulating valve. The flow rate, pressure and flow velocity of the gas phase can be real-time regulated through the gas flow regulating valve and the gas pressure regulating valve, so as to cooperate with the microfluidic chip 32 to generate gas bubbles of different particle sizes.

[0024] Further, as Figure 2 shown, a number of gas inlet channels 200 are arranged on one side of the liquid inlet channel 100, and a variable-diameter bubble generation cavity 300 is arranged between the intersection of the gas inlet channel 200 and the liquid inlet channel 100. By arranging a number of gas inlet channels 200 along the liquid inlet channel 100, the gas phase is injected into the liquid phase in a segmented manner, and a variable-diameter bubble generation cavity 300 is arranged at the intersection of the gas inlet channel 200 and the liquid inlet channel 100. The variable-diameter bubble generation cavity 300 includes a number of cavities connected in sequence and with alternately changing through-hole diameters. When the gas phase and the liquid phase enter the variable-diameter area of the variable-diameter bubble generation cavity 300, the pressure change acts on the liquid phase and the gas phase, assisting the gas phase to be quickly distributed into the liquid phase to form gas bubbles.

[0025] Other parts of this embodiment are the same as those of Embodiment 1, so they will not be described in detail.

[0026] Embodiment 3: This embodiment discloses a microfluidic foaming flushing arc machining device, which is further optimized on the basis of the above Embodiment 1 or 2. As Figure 1 shown, the gas bubble outlet of the microfluidic chip 32 is connected to a transparent gas bubble dispensing chip 33. A flat inner cavity is arranged inside the transparent gas bubble dispensing chip 33, and the thickness of the flat inner cavity is between the diameter of a single gas bubble and the sum of the diameters of two gas bubbles; the outlet end of the transparent gas bubble dispensing chip 33 is connected to one side of the liquid inlet channel 22, and at least one group of visual detection devices 4 is arranged on one side of the transparent gas bubble dispensing chip 33. The thickness of the flat inner cavity is between the diameter of a single bubble body and the sum of the diameters of two bubble bodies, so that after the chess piece enters the flat inner cavity, the bubbles are arranged in a single layer in the flat inner cavity. At this time, the bubble bodies arranged in the flat inner cavity are photographed by the visual detection device 4, and the photographed image is transmitted to the control system. After the image is recognized by the control system, the current bubble density of the bubble bodies can be obtained, and based on this, it can be calculated whether the cavitation impact force of the foaming electrolyte finally output to the workpiece processing surface on the remelting layer is appropriate.

[0027] Other parts of this embodiment are the same as those of the above-mentioned Embodiment 1 or 2, so they will not be described in detail.

[0028] Embodiment 4: This embodiment discloses a microfluidic foaming flushing arc machining device, which is further optimized on the basis of any one of the above-mentioned Embodiments 1-3, such as Figure 4 As shown, a plurality of installation slots are evenly arranged along the circumference on the distribution disk 31, the microfluidic chip 32 is clamped inside the installation slots, a liquid-phase quick-connect bayonet and a gas-phase quick-connect bayonet are arranged at the inlet end of the installation slots, and the outlet end of the installation slots is connected to the transparent bubble body distribution chip 33.

[0029] A liquid-phase quick-connect bayonet and a gas-phase quick-connect bayonet are arranged at the inlet end of the installation slots. After the microfluidic chip 32 is clamped inside the installation slots, the liquid-phase installation bayonet is quickly docked with the liquid inlet channel 100 and the gas inlet channel 200 on the microfluidic chip 32 at this time. An outlet quick-connect bayonet is arranged at the outlet end of the installation slots, and the outlet of the microfluidic chip 32 is quickly clamped with the outlet quick-connect bayonet, thereby realizing the efficient and convenient disassembly and assembly of the microfluidic chip 32 on the distribution disk 31. Other parts of this embodiment are the same as those of any one of the above-mentioned Embodiments 1-3, so they will not be described in detail.

[0030] Embodiment 5: This embodiment discloses a microfluidic foaming flushing arc machining device, which is further optimized on the basis of any one of the above-mentioned Embodiments 1-4, such as Figure 5 As shown, a screening cavity is arranged inside the screening part 21, a fixed disk 211 and a rotating disk 212 are arranged inside the screening cavity, and screening holes are arranged in alignment on both the fixed disk 211 and the rotating disk 212; the rotating disk 212 can rotate relative to the fixed disk 211 to adjust the alignment area of the screening holes.

[0031] A gear ring is provided on the outer side of the rotating disk 212, and a motor is provided outside the screening part 21. A gear is sleeved on the output shaft of the motor, and the gear is meshed and connected with the gear ring. The motor drives the gear and the gear ring to rotate, thereby driving the rotating disk 212 to rotate relative to the fixed disk 211, and then adjusting the alignment area between the screening holes on the rotating disk 212 and the screening holes on the fixed disk 211. When the screening holes on the rotating disk 212 are completely aligned with the screening holes on the fixed disk 211, the through-diameter is the largest. By adjusting the alignment area of the screening holes, the adjustment of the through-diameter is realized, and finally the screening of the gas bubble bodies with a particle size larger than the through-diameter is realized. And through the densely arranged screening holes in an array, the gas bubble bodies are more uniformly distributed in the electrolyte.

[0032] Other parts of this embodiment are the same as any one of the above-mentioned Embodiments 1-4, so they will not be described in detail.

[0033] Embodiment 6: This embodiment discloses a microfluidic foaming flushing arc machining device, which is further optimized on the basis of any one of the above-mentioned Embodiments 1-5. A linear feeding device 24 is provided on one side of the nozzle 23, a swinging device 25 is provided on the feeding end of the linear feeding device 24, and a nozzle 23 is provided on the swinging end of the swinging device 25. The linear feeding device 24 is used to drive the nozzle 23 to linearly move towards the machining surface of the workpiece to adjust the linear distance between the nozzle 23 and the machining surface. The swinging device 25 is used to drive the nozzle 23 to swing relative to the machining surface, and then adjust the deflection angle of the nozzle 23 relative to the machining surface to ensure that the foaming electrolyte finally sprayed by the nozzle 23 can impact the machining surface at an appropriate distance and deflection angle.

[0034] Further, as Figure 3 shown, the swinging device 25 includes a mounting seat 251, an electromagnet 252, a magnet 253, and a swinging seat 254. An arc-shaped inner cavity is provided inside the mounting seat 251. A nozzle 23 is provided at the center of the bottom of the swinging seat 254. The bottom of the swinging seat 254 is slidably matched with the arc-shaped inner cavity in the area around the nozzle 23. A plurality of magnets 253 are circumferentially arranged on the outer side of the swinging seat 254, and electromagnets 252 are provided on the inner wall of the mounting seat 251 corresponding to the magnets 253.

[0035] Other parts of this embodiment are the same as any one of the above-mentioned Embodiments 1-5, so they will not be described in detail.

[0036] Embodiment 7: This embodiment discloses a microfluidic foaming flushing arc machining method, which is realized based on the microfluidic foaming flushing arc machining device described in any one of the above-mentioned Embodiments 1-6, and includes the following steps: Step 1: During the first time interval, electrolyte is delivered to the nozzle 23 through the liquid inlet channel 22. The microfluidic foaming device 3 is maintained closed during the first time interval, and an electric arc is generated by the tool electrode 1 to machine the workpiece. The electrolyte is sprayed onto the machining surface of the workpiece through the nozzle 23 with predetermined parameters. Step 2: After the first time interval, the microfluidic foaming device 3 is turned on. The microfluidic foaming device 3 delivers the generated gas bubbles to the sieving part 21. The control system controls the sieving part 21 to uniformly mix the gas bubbles with the electrolyte and control the particle size of the gas bubbles, forming a foamed electrolyte with a specific bubble density. Step 3: According to the diffusivity of the gas bubbles in the foamed electrolyte on the machining surface of the workpiece, the control system controls the microfluidic foaming device 3 to adjust the particle size of the gas bubbles and controls the bubble density of the foamed electrolyte through the sieving part 21. Step 4: According to the degree of remelting layer accumulation on the tool electrode 1 and the workpiece surface, the control system controls the linear distance and deflection angle of the nozzle 23 relative to the machining surface of the workpiece to control the thickness of the remelting layer within the calibrated range until the machining of the workpiece is completed.

[0037] Other parts of this embodiment are the same as any one of the above Embodiments 1-6, so they will not be described in detail.

[0038] The above are only the preferred embodiments of the present invention, and do not impose any form of limitation on the present invention. Any simple modification and equivalent change made to the above embodiments based on the technical essence of the present invention fall within the protection scope of the present invention.

Claims

1. A microfluidic foaming and flushing arc machining device, comprising a tool electrode (1) for generating an arc, characterized in that: At least one group of electrolyte distribution devices (2) are arranged around the tool electrode (1), the electrolyte distribution device (2) comprising at least one screening portion (21), the screening portion (21) comprising a liquid inlet channel (22); at least one group of microfluidic foaming devices (3) are arranged on one side of the liquid inlet channel (22), the microfluidic foaming device (3) is used to generate bubbles with controllable particle size; the screening portion (21) is used to mix the electrolyte and the bubbles, and to screen and control the density of the bubbles; and at least one group of nozzles (23) capable of linear movement and deflection relative to a workpiece are arranged at the outlet of the screening portion (21).

2. A microfluidic foaming and liquid-flushing arc processing device according to claim 1, characterized in that: The microfluidic foaming device (3) comprises a distribution plate (31) which is layered in sequence, a plurality of microfluidic chips (32) being evenly arranged along the circumference of the distribution plate (31), and the particle sizes of bubbles ultimately output by the microfluidic chips (32) inside the distribution plates (31) at different levels are different; a liquid inlet flow channel (100) and an inlet flow channel (200) are arranged on the distribution plate (31), the liquid inlet flow channel (100) being connected to the liquid inlet end of the microfluidic chip (32), and the inlet flow channel (200) The microfluidic chip (32) is connected to the air inlet end of the microfluidic chip (200), and the bubble outlet of the microfluidic chip (32) is connected to one side of the liquid inlet channel (22); the liquid inlet channel (100) of the distribution plate (31) is connected to the liquid distribution device, and the inlet channel (200) of the distribution plate (31) is connected to the gas distribution device, the liquid distribution device is configured to be able to adjust the flow rate, pressure, and flow rate of the inlet liquid, and the gas distribution device is configured to be able to adjust the flow rate, pressure, and flow rate of the inlet gas.

3. A microfluidic foaming and flushing arc processing device according to claim 2, characterized in that: A plurality of inlet flow channels (200) are arranged on one side of the liquid inlet flow channel (100), and a variable-diameter bubble generation cavity (300) is provided between the intersection of the inlet flow channels (200) and the liquid inlet flow channel (100).

4. A microfluidic foaming and liquid-flushing arc processing device according to claim 3, characterized in that: The bubble outlet of the microfluidic chip (32) is connected to a transparent bubble distribution chip (33); a flat inner cavity is provided inside the transparent bubble distribution chip (33); the thickness of the flat inner cavity is between the diameter of a single bubble and the sum of the diameters of two bubbles; the outlet end of the transparent bubble distribution chip (33) is connected to one side of the liquid inlet channel (22); and at least one set of visual detection devices (4) is arranged on one side of the transparent bubble distribution chip (33).

5. A microfluidic foaming and liquid-flushing arc processing device according to claim 4, characterized in that: The distribution plate (31) is provided with a plurality of mounting slots evenly distributed along the circumference, the microfluidic chip (32) is mounted inside the mounting slots, the inlet end of the mounting slots is provided with a liquid inlet channel (100) and an inlet flow channel (200), and the outlet end of the mounting slots is connected to a transparent bubble distribution chip (33).

6. A microfluidic foaming and liquid-flushing arc machining device according to any one of claims 1 to 5, characterized in that: A screening cavity is provided inside the screening portion (21), and a fixed disk (211) and a rotating disk (212) are provided inside the screening cavity. The fixed disk (211) and the rotating disk (212) are both provided with screen holes aligned thereon; the rotating disk (212) can rotate relative to the fixed disk (211) to adjust the alignment area of ​​the screen holes.

7. A microfluidic foaming and liquid-flushing arc machining device according to any one of claims 1 to 5, characterized in that: A linear feeding device (24) is provided on one side of the nozzle (23), a swing device (25) is provided on the feeding end of the linear feeding device (24), and a nozzle (23) is provided on the swing end of the swing device (25).

8. A microfluidic foaming and liquid-flushing arc processing device according to claim 7, characterized in that: The swing device (25) comprises a mounting seat (251), an electromagnet (252), a magnet (253), and a swing seat (254); an arc-shaped inner cavity is arranged inside the mounting seat (251); a nozzle (23) is arranged at the bottom center of the swing seat (254); the bottom of the swing seat (254) is located in the area around the nozzle (23) and is slidably matched with the arc-shaped inner cavity; a plurality of magnets (253) are arranged on the outer side of the swing seat (254) along the circumferential direction; and electromagnets (252) are arranged on the inner wall of the mounting seat (251) corresponding to the magnets (253).

9. A microfluidic foaming and liquid-flushing arc machining device according to any one of claims 1 to 5, characterized in that: It also includes a control system, wherein the control system is configured to regulate the particle size of the bubbles generated by the microfluidic foaming device (3), the control system is configured to control the bubble density after the screening part (21) mixes the electrolyte and the bubbles, and the control system is configured to control the linear distance and deflection angle of the nozzle (23) relative to the workpiece processing surface.

10. A microfluidic foaming and flushing arc machining method, implemented based on the microfluidic foaming and flushing arc machining device according to any one of claims 1 to 9, characterized in that: The following steps are involved: Step 1: delivering electrolyte to the nozzle (23) through the liquid inlet channel (22) within a first time interval, maintaining the microfluidic foaming device (3) closed within the first time interval, generating an arc through the tool electrode (1) to process the workpiece, and spraying the electrolyte with predetermined parameters onto the processing surface of the workpiece through the nozzle (23); Step 2: After the first time interval, the microfluidic foaming device (3) is turned on, and the microfluidic foaming device (3) transports the generated bubbles to the screening part (21). The control system controls the screening part (21) to evenly mix the bubbles with the electrolyte and screen the particle size of the bubbles to form a foaming electrolyte with a specific bubble density. Step 3: According to the diffusion degree of bubbles in the foaming electrolyte on the workpiece processing surface, the control system controls the microfluidic foaming device (3) to adjust the particle size of the bubbles, and controls the bubble density of the foaming electrolyte through the screening part (21); Step 4: Based on the accumulation degree of the remelted layer on the tool electrode (1) and the workpiece surface, the control system controls the linear spacing and deflection angle of the nozzle (23) relative to the workpiece processing surface to control the thickness of the remelted layer within a calibrated range until the workpiece processing is completed.

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