Water jet-ultrasonic assisted laser drilling device and using method thereof

Abstract

The invention provides a water jet-ultrasonic assisted laser drilling device and a using method thereof, and belongs to the technical field of laser drilling. The technical problems that in the prior art, when a millisecond laser is used for punching, a large amount of melt splashes and is solidified on the surface of a workpiece are solved. According to the technical scheme, the water jet-ultrasonic assisted laser drilling device comprises a support, a millisecond laser device, a circulating device, a containing box and a water storage box, a laser head is arranged on the millisecond laser device, a clamp is installed at the upper end of the containing box, and a water jet spray head is arranged on the circulating device. The device has the beneficial effects that water jet and ultrasonic waves jointly assist laser machining, melt in a hole is rapidly discharged out of the hole through the scouring and cooling effects of water flow, heat is reduced, the machining quality is improved, cavitation bubbles in the water jet are broken through vibration of the ultrasonic waves, the attenuation effect of the bubbles on laser is reduced, and the machining quality is improved. Meanwhile, grains around the holes are refined, and the mechanical property of the material is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of laser drilling, and in particular to a water jet-ultrasound-assisted laser drilling device and a use method thereof. Background Art

[0002] Film cooling holes are an important process in aero-engine manufacturing, which is directly related to the performance and reliability of the engine. Purpose of drilling: The main purpose of film cooling holes is to realize film cooling technology. By machining tiny holes on the blades, high-speed airflow is ejected, forming a layer of air film on the surface of the blades, effectively reducing the temperature of the blades and protecting the blades from high temperatures. Technical advantages: Laser drilling technology has significant advantages. It has a fast processing speed, which is 10 to 1000 times that of traditional mechanical equipment, greatly improving production efficiency. At the same time, laser drilling is not affected by material properties, and can process almost any material to achieve deformation-free drilling.

[0003] Millisecond pulse laser is a long pulse laser with high laser power, high mass mobility and very high drilling efficiency. It can complete the processing of micro-holes with large depth-to-diameter ratio and is very suitable for the processing of cooling holes for aircraft turbine blades. Although millisecond laser drilling has many outstanding advantages, its pulse width characteristics determine the following defects in the drilling process:

[0004] First, the energy density of millisecond laser is not high, and it mainly relies on melting the material to remove the material, which belongs to the category of thermal processing. When a large amount of molten material in the hole is discharged in the form of splashes, it is easy to accumulate and solidify on the surface of the workpiece around the hole, affecting the quality of the processed surface.

[0005] Second, the molten material that is not completely discharged from the hole will cool and solidify on the hole wall to form a recast layer. Summary of the invention

[0006] The purpose of the present invention is to overcome the problems in the background technology and provide a water jet-ultrasound-assisted laser drilling device and a method of using the same. The device assists laser processing by using a water jet and ultrasound. The scouring and cooling effect of the water flow allows the molten material in the hole to be quickly discharged out of the hole and reduces heat, thereby improving the processing quality. The cavitation bubbles in the water jet are broken by ultrasonic vibration, thereby reducing the attenuation effect of the bubbles on the laser. At the same time, the grains around the hole are refined, thereby improving the mechanical properties of the material.

[0007] In order to achieve the above-mentioned invention object, the technical solution adopted by the present invention is specifically: a water jet-ultrasonic assisted laser drilling device, including a bracket, and a millisecond laser, a circulation device, a placement box and a water storage box arranged on the bracket, wherein the water storage box is used to supply water to the wastewater collection and circulation device, the placement box is used to fix the ultrasonic vibrator, fix the fixture, and assist in the recovery of wastewater, the circulation device is used to flush the surface of the workpiece and recover the wastewater at the same time, the water storage box is located below the placement box, and is respectively connected to the circulation device and the placement box, the millisecond laser is provided with a laser head, the placement box is located below the laser head, and a fixture is installed on the upper end of the placement box, the fixture is used to install the workpiece and provide a carrier for the ultrasonic vibrator, the circulation device is provided with a water jet nozzle, the water jet nozzle is connected to the laser head through a connecting piece, and the connecting piece is used to fix the water jet nozzle.

[0008] Furthermore, the circulation device includes a variable frequency water pump, the output end of the variable frequency water pump is connected to the water jet nozzle through pipe 1, the input end of the variable frequency water pump is connected to the water storage box through pipe 2, the variable frequency water pump in the circulation device draws water from the water storage box through pipe 2, and sprays water from the water jet nozzle to the workpiece through pipe 1. The water jet nozzle in the circulation device converts liquid water into a fine jet beam, which can synchronously erode the material processing surface, avoid air oxidation of materials, reduce the formation of slag from the molten material, and continuously take away heat for cooling. At the same time, the water in the processing area generates strong convection and a large number of bubbles under the action of laser irradiation. The continuous generation and rupture of bubbles accelerates the convection of water, which helps to remove the molten chips in time.

[0009] Furthermore, the water storage box is also provided with a water injection pipe and a water return pipe, and one end of the water return pipe away from the water storage box is connected to the bottom of the placement box;

[0010] The water return pipe is arranged on the upper end surface of the water storage box, so that waste water can directly enter the water storage box;

[0011] Filters are installed at the connections between pipe 1, pipe 2, the water injection pipe and the return pipe and the water storage box respectively. The filters can filter impurities in the wastewater, which is beneficial to ensure its processing quality. At the same time, they can also ensure the cleanliness of the water, realize the recycling of wastewater resources, and reduce the waste of water resources.

[0012] Furthermore, the placement box includes a box body without a top surface at the upper end, and the four side walls inside the box body are respectively provided with support walls in one piece, and the upper end surface of each support wall is provided with two threaded holes, and the clamp is installed on the upper end surface of the support wall by bolts, and drainage holes are formed between adjacent support walls, and wastewater enters the bottom of the placement box through the drainage holes;

[0013] A drainage hole connected to the return pipe is provided at the bottom of the placement box, and a slope is provided at the bottom of the placement box. The slope is used to divert wastewater so that all wastewater enters the drainage hole, that is, the center point of the bottom of the placement box is recessed downward by about degrees, and the drainage hole is located at the center point of the recess; when working, wastewater enters the drainage hole from the upper side of the clamp, and converges downward at the bottom of the placement box. The wastewater at the bottom converges near the drainage hole along the slope, enters the return pipe through the drainage hole, and finally flows into the water storage box.

[0014] Furthermore, one end of the connecting piece is in the shape of a clamp, and its clamping force is adjusted by bolts, and the other end is rotatably provided with an active card, and the active card adopts the structure of a U-shaped spring. The water jet nozzle is inserted into the active card, and the connecting piece is installed on the laser head through the clamp-shaped end and fastened by bolts to ensure the stability of the water flow during the processing project. The water jet nozzle can be clamped in the active card at the other end, and the user can freely adjust the spray angle of the water jet nozzle by rotating the active card, which is convenient for the user to use.

[0015] Furthermore, the fixture includes a vibration plate, and a plurality of ultrasonic vibrators are installed on the bottom wall of the vibration plate by bolts. The high-frequency vibration assisted by ultrasound can significantly break the cavitation bubbles into smaller bubbles, reduce the disturbance of the bubbles to the laser beam, and the ultrasonic vibration can effectively improve the crystal structure, refine the grains, eliminate stress, reduce internal defects and improve the mechanical properties, and process better quality micropores while taking into account the processing efficiency; a plurality of positioning pins are arranged on the upper surface of the vibration plate, and an upper clamping plate and a lower clamping plate are movably arranged on the positioning pins, and an adjusting bolt is arranged between the upper clamping plate and the lower clamping plate. When the workpiece is installed, a part of the workpiece is first placed between the upper clamping plate and the lower clamping plate, and the workpiece is clamped and fixed by the adjusting bolt. The part of the workpiece to be processed is located outside the upper clamping plate and the lower clamping plate, which is convenient for processing.

[0016] Further, the vibration plate is mounted on the upper end surface of the support wall by bolts;

[0017] The vibration plate is a truncated quadrilateral, and its four corners form an annular space with the inner wall of the placement box. The annular space is respectively connected with the corresponding drainage holes up and down to form a water flow channel. Through the four truncated corners of the vibration plate quadrilateral, water flows into the drainage holes from the four corners of the placement box and finally flows to the bottom. At the same time, such a setting can protect the ultrasonic vibrator from being damaged by the water flow. The vibration of the ultrasonic vibrator drives the vibration plate and the upper and lower clamping plates to vibrate, and then drives the workpiece to vibrate, realizing ultrasonic-assisted processing and improving the drilling quality.

[0018] Furthermore, the power of the ultrasonic vibrator generator is 100w-800w, and the ultrasonic vibrator is connected to an external control switch through a wire.

[0019] The present invention also provides a method for using the auxiliary laser drilling device, comprising the following steps:

[0020] S1. Install the connector, install the clamp-shaped end of the connector on the laser head, and tighten it with bolts. Insert the water jet nozzle into the movable card. The water jet nozzle is easy to disassemble and assemble;

[0021] S2, installing the fixture, firstly install the plurality of ultrasonic vibrators on the bottom of the vibration plate by bolts, and then install the vibration plate on the upper ends of the four supporting walls by bolts, when the ultrasonic vibrators vibrate, the vibration plate is driven to vibrate, and then the workpiece is driven to vibrate;

[0022] S3. Install the workpiece, place one end of the workpiece between the upper clamping plate and the lower clamping plate, place the part of the workpiece to be processed on the outside of the upper clamping plate and the lower clamping plate, and tighten the upper clamping plate and the lower clamping plate to fix the workpiece by adjusting the bolts; position the upper clamping plate and the lower clamping plate by the four positioning pins above the vibration plate, put the workpiece into the upper and lower clamping plates, and tighten and fix them by bolts to ensure that no displacement occurs during the processing;

[0023] S4, move the millisecond laser through the control system to move it above the workpiece, adjust the laser parameters, and prepare for subsequent processing;

[0024] S5. Manually rotate the movable card to make the angle between the water jet nozzle and the vibration plate between 45°-60°. The angle of the water jet nozzle is easy to adjust. The angle between the water jet nozzle and the vibration plate is 60°, which makes the water jet have the best flushing effect on the melt and makes it easier for the residue to be discharged from the hole.

[0025] S6. Turn on the variable frequency water pump and adjust the water pressure and water flow rate. The water pressure is adjusted to less than 1MPa and the water flow rate is 10m / s to 20m / s. The water jet nozzle flushes the workpiece.

[0026] S7, turn on the ultrasonic vibrator through an external control switch to make it vibrate, the ultrasonic vibrator drives the fixture to vibrate, the ultrasonic generator power is 100w~800w, when the laser drilling, the molten material in the hole cools and adheres to the inner wall of the hole, the ultrasonic vibration frequency is too small to vibrate it out of the hole, and the vibration frequency is too large to affect the hole shape. The most suitable frequency for laser drilling is 20KHz~60KHz, and the present invention selects 35KHz;

[0027] S8. The millisecond laser starts drilling. The millisecond laser uses a circular cutting method to further reduce the thermal impact during the drilling process, ensuring better quality while being highly efficient. During the drilling process, the water jet nozzle flushes the workpiece, and the flushed waste water enters the drainage hole through the annular space at the four cut corners of the vibration plate, and then gathers at the bottom of the placement box, and finally enters the water storage box through the return pipe, and then is pumped out of the water storage box under the action of the variable frequency water pump and flushes the workpiece again, thereby completing the recycling.

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] 1. The present invention adopts a water jet-ultrasound-assisted laser drilling method. The water jet nozzle in the circulation device can convert the evenly distributed static water into a thin stream that can be continuously and concentratedly sprayed. This can not only synchronously erode the material processing surface, avoid air oxidation of the material, and reduce the formation of slag from the molten material, but also continuously take away heat for cooling. At the same time, the water in the processing area generates strong convection and a large number of bubbles under the action of laser irradiation. The continuous generation and bursting of bubbles accelerates the convection of water, which helps to remove the molten chips in time.

[0030] 2. The high-frequency vibration generated by the ultrasonic vibrator in the present invention can significantly break the cavitation bubbles into smaller bubbles, reduce the disturbance of the bubbles to the laser beam, and the ultrasonic vibration can effectively improve the crystal structure, refine the grains, eliminate stress, reduce internal defects and improve mechanical properties, while taking into account the processing efficiency and processing better quality micropores.

[0031] 3. The millisecond laser processing in the present invention has high efficiency due to its high power, but it will inevitably produce thermal effects during processing, resulting in micropore defects. The device uses water jet and ultrasound to assist laser processing. The molten material in the hole is quickly discharged out of the hole through the flushing and cooling effect of the water flow, reducing heat and improving processing quality. The cavitation bubbles in the water jet are broken by ultrasonic vibration, reducing the attenuation effect of the bubbles on the laser, while refining the grains around the hole and improving the mechanical properties of the material.

[0032] 4. The vibration plate of the present invention adopts a truncated quadrilateral structure, so that waste water flows from four corners to the bottom of the placement box, and the ultrasonic vibrator will not be damaged by the influence of water. At the same time, the vibration plate is a detachable structure, which is convenient for replacing the ultrasonic vibrator.

[0033] 5. In the present invention, the water jet nozzle and the laser head are relatively fixed by a connecting piece, and are detachably connected to the water jet nozzle by an active card, so that the laser can be easily replaced.

[0034] 6. In the present invention, waste water is collected and filtered through a circulation device, which can purify the waste water and reduce the waste of water resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention.

[0036] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0037] Figure 2 It is a schematic diagram of the structure of the circulation device and the water storage box in the present invention.

[0038] Figure 3 for Figure 2 Schematic diagram of the internal enlarged structure at point A in the middle.

[0039] Figure 4 It is a schematic diagram of the structure of the connecting piece in the present invention.

[0040] Figure 5 It is a schematic diagram of the side section structure of the placement box in the present invention.

[0041] Figure 6 It is a bottom schematic diagram of the clamp in the present invention.

[0042] Figure 7 It is a schematic diagram of the overall structure of the clamp in the present invention.

[0043] Figure 8 This is a flow chart of the water jet-ultrasound-assisted laser drilling process of the present invention.

[0044] Among them, the figure markings are: 1. bracket; 2. millisecond laser; 3. circulation device; 4. placement box; 5. water storage box; 6. clamp; 7. water jet nozzle; 8. laser head; 9. connector; 10. variable frequency water pump; 11. pipeline one; 12. pipeline two; 13. water injection pipe; 14. return pipe; 15. box body; 16. support wall; 17. drainage hole; 18. positioning pin; 19. drainage hole; 20. movable card; 21. vibration plate; 22. ultrasonic vibrator; 23. upper clamping plate; 24. lower clamping plate; 25. filter screen. DETAILED DESCRIPTION

[0045] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. Of course, the specific embodiments described here are only used to explain the present invention and are not used to limit the present invention.

[0046] Example

[0047] like Figure 1-Figure 7As shown, this embodiment provides a water jet-ultrasonic assisted laser drilling device, including a bracket 1, and a millisecond laser 2, a circulation device 3, a placement box 4 and a water storage box 5 arranged on the bracket 1, wherein the water storage box 5 is used to supply water to the wastewater collection and circulation device 3, the placement box 4 is used to fix the ultrasonic vibrator 22, fix the fixture 6, and assist in the recovery of wastewater, the circulation device 3 is used to flush the surface of the workpiece and recover the wastewater at the same time, the water storage box 5 is located below the placement box 4, and is respectively connected to the circulation device 3 and the placement box 4, a laser head 8 is arranged on the millisecond laser 2, the placement box 4 is located below the laser head 8, and a fixture 6 is installed on the upper end of the placement box 4, the fixture 6 is used to install the workpiece and provide a carrier for the ultrasonic vibrator 22, a water jet nozzle 7 is arranged on the circulation device 3, and the water jet nozzle 7 is connected to the laser head 8 through a connector 9, and the connector 9 is used to fix the water jet nozzle 7.

[0048] The circulation device 3 includes a variable frequency water pump 10, the output end of the variable frequency water pump 10 is connected to the water jet nozzle 7 through a pipe 11, and the input end of the variable frequency water pump 10 is connected to the water storage box 5 through a pipe 2 12. The variable frequency water pump 10 in the circulation device 3 draws water from the water storage box 5 through the pipe 2 12, and sprays the water from the water jet nozzle 7 to the workpiece through the pipe 1 11. The water jet nozzle 7 in the circulation device 3 converts liquid water into a fine jet beam, which can synchronously erode the material processing surface, avoid air oxidation of the material, and reduce the formation of slag by the molten material, and can also continuously take away heat for cooling. At the same time, the water in the processing area generates strong convection and a large number of bubbles under the action of laser irradiation. The continuous generation and rupture of bubbles accelerate the convection of water, which helps to remove the molten chips in time.

[0049] The water storage box 5 is also provided with a water injection pipe 13 and a return pipe 14. The end of the return pipe 14 away from the water storage box 5 is connected to the bottom of the placement box 4. The return pipe 14 is arranged on the upper end surface of the water storage box 5, so that it is convenient for waste water to directly enter the water storage box 5. Filter nets 25 are respectively installed at the connection between pipe 1 11, pipe 2 12, the water injection pipe 13 and the return pipe 14 and the water storage box 5. The filter net 25 can filter impurities in the waste water, which is beneficial to ensure its processing quality. At the same time, it can also ensure the clean water quality, realize the recycling of wastewater resources, and reduce the waste of water resources.

[0050] The placement box 4 includes a box body 15 without a top surface at the upper end, and the four side walls inside the box body 15 are respectively integrally provided with support walls 16, and the upper end surface of each support wall 16 is provided with two threaded holes. The clamp 6 is installed on the upper end surface of the support wall 16 by bolts, and a drainage hole 17 is formed between adjacent support walls 16. Wastewater enters the bottom of the placement box 4 through the drainage hole 17. A drainage hole 19 connected to the return pipe 14 is provided at the bottom of the placement box 4. A slope is provided at the bottom of the placement box 4. The slope is used to divert the wastewater so that all the wastewater enters the drainage hole 19, that is, the center point of the bottom of the placement box 4 is recessed downward by about 5°, and the drainage hole 19 is located at the center point of the recess; when working, the wastewater enters the drainage hole 17 from the upper side of the clamp 6, and converges downward at the bottom of the placement box 4. The bottom wastewater converges near the drainage hole 19 along the slope, and enters the return pipe 14 through the drainage hole 19, and finally flows into the water storage box 5.

[0051] One end of the connecting piece 9 is in the shape of a clamp, and its clamping force is adjusted by bolts. The other end is rotatably provided with an active clamp 20. The active clamp 20 adopts a U-shaped spring structure. The water jet nozzle 7 is inserted into the active clamp 20. The connecting piece 9 is installed on the laser head 8 through one end in the shape of a clamp and is fastened by bolts to ensure the stability of the water flow in the processing project. The water jet nozzle 7 can be clamped in the active clamp 20 at the other end. The user can freely adjust the spray angle of the water jet nozzle 7 by rotating the active clamp 20, which is convenient for the user to use.

[0052] The fixture 6 includes a vibration plate 21, which is installed on the upper end surface of the support wall 16 by bolts. A plurality of ultrasonic vibrators 22 are installed on the bottom wall of the vibration plate 21 by bolts. The high-frequency vibration generated by ultrasonic assistance can obviously break the cavitation bubbles into smaller bubbles, reduce the disturbance of the bubbles to the laser beam, and the ultrasonic vibration can effectively improve the crystal structure, refine the grains, eliminate stress, reduce internal defects and improve the mechanical properties, and process micropores with better quality while taking into account the processing efficiency; four positioning pins 18 are arranged on the upper surface of the vibration plate 21, and an upper clamping plate 23 and a lower clamping plate 24 are movably arranged on the four positioning pins 18. The upper clamping plate 23 can slide up and down on the positioning pins 18, and an adjusting bolt is connected between the upper clamping plate 23 and the lower clamping plate 24. When the workpiece is installed, a part of the workpiece is first placed between the upper clamping plate 23 and the lower clamping plate 24, and the workpiece is clamped and fixed by the adjusting bolt. The part of the workpiece to be processed is located outside the upper clamping plate 23 and the lower clamping plate 24, which is convenient for processing.

[0053] The vibration plate 21 is a truncated quadrilateral, and its four corners form an annular space with the inner wall of the placement box 4. The annular space is connected to the corresponding drainage holes 17 up and down, respectively, to form a water flow channel. Through the four truncated corners of the vibration plate 21 quadrilateral, the water flows into the drainage holes 17 from the four corners of the placement box 4 and finally flows to the bottom. At the same time, such a setting can protect the ultrasonic vibrator 22 from being damaged by the water flow. The vibration of the ultrasonic vibrator 22 drives the vibration plate 21 and the upper and lower clamping plates 24 to vibrate, and then drives the workpiece to vibrate, realizing ultrasonic assisted processing and improving the quality of drilling. The power of the ultrasonic vibrator 22 generator is 100w~800w, and the ultrasonic vibration frequency is selected to be 35KHz. The ultrasonic vibrator 22 is connected to the external control switch through a wire.

[0054] In order to better achieve the above-mentioned invention effect, the present invention also provides a method for using the auxiliary laser drilling device, such as Figure 8 As shown, the specific steps include:

[0055] Step 1: Install the connector 9, install the clamp-shaped end of the connector 9 on the laser head 8, and fasten it with bolts, insert the water jet nozzle 7 into the movable card 20, and the water jet nozzle 7 is easy to disassemble and assemble;

[0056] Step 2, install the fixture 6, first install multiple ultrasonic vibrators 22 on the bottom of the vibration plate 21 through bolts, and then install the vibration plate 21 on the upper ends of the four support walls 16 through bolts, when the ultrasonic vibrators 22 vibrate, the vibration plate 21 is driven to vibrate, and then the workpiece is driven to vibrate;

[0057] Step 3: Install the workpiece, place a part of the workpiece between the upper clamping plate 23 and the lower clamping plate 24, and place the part of the workpiece to be processed on the outside of the upper clamping plate 23 and the lower clamping plate 24. Adjust the bolts to tighten the upper clamping plate 23 and the lower clamping plate 24 to fix the workpiece; position the upper clamping plate 23 and the lower clamping plate 24 through the four positioning pins 18 above the vibration plate 21, and tighten and fix the workpiece after placing it in the upper and lower clamping plates 24 to ensure that no displacement occurs during the processing;

[0058] Step 4: Move the millisecond laser 2 through the control system to above the workpiece, adjust the laser parameters, and prepare for subsequent processing;

[0059] Step 5: Manually rotate the movable card 20 to make the angle between the water jet nozzle 7 and the vibration plate 21 between 45° and 60°. The angle of the water jet nozzle 7 is easy to adjust. The angle between the water jet nozzle 7 and the vibration plate 21 is 60°, which is the best, so that the water jet has the best flushing effect on the melt, and the residue is easier to discharge out of the hole;

[0060] Step 6: Turn on the variable frequency water pump 10, and adjust the water pressure and water flow rate, adjust the water pressure to less than 1MPa, the water flow rate to 10m / s-20m / s, and the water jet nozzle 7 to flush the workpiece;

[0061] Step 7, turn on the ultrasonic vibrator 22 through an external control switch to make it vibrate, the ultrasonic vibrator 22 drives the fixture 6 to vibrate, the ultrasonic generator power is 100w~800w, when the laser drilling, the molten material in the hole cools and adheres to the inner wall of the hole, the ultrasonic vibration frequency is too small to vibrate it out of the hole, and the vibration frequency is too large to affect the hole shape. The most suitable frequency for laser drilling is 20KHz~60KHz, and the present invention selects 35KHz;

[0062] Step eight, the millisecond laser 2 starts drilling. The millisecond laser 2 uses a circular cutting method to further reduce the thermal impact during the drilling process, ensuring better quality while being efficient. During the drilling process, the water jet nozzle 7 flushes the workpiece, and the flushed wastewater enters the drainage hole 17 through the annular space at the four cut corners of the vibration plate 21, and then gathers at the bottom of the placement box 4, and finally enters the water storage box 5 through the return pipe 14, and then is pumped out of the water storage box 5 under the action of the variable frequency water pump 10 and flushes the workpiece again, thereby completing the recycling.

[0063] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A water jet-ultrasound-assisted laser drilling device, characterized in that: The invention comprises a bracket (1), and a millisecond laser (2), a circulation device (3), a placement box (4) and a water storage box (5) arranged on the bracket (1); the water storage box (5) is located below the placement box (4) and is respectively connected to the circulation device (3) and the placement box (4); a laser head (8) is arranged on the millisecond laser (2); the placement box (4) is located below the laser head (8); a clamp (6) is installed on the upper end of the placement box (4); a water jet nozzle (7) is arranged on the circulation device (3); and the water jet nozzle (7) is connected to the laser head (8) via a connecting piece (9).

2. A water jet-ultrasound-assisted laser drilling device according to claim 1, characterized in that: The circulation device (3) comprises a variable frequency water pump (10), the output end of the variable frequency water pump (10) is connected to the water jet nozzle (7) through a pipe 1 (11), and the input end of the variable frequency water pump (10) is connected to the water storage box (5) through a pipe 2 (12).

3. A water jet-ultrasound-assisted laser drilling device according to claim 2, characterized in that: The water storage box (5) is also provided with a water injection pipe (13) and a water return pipe (14), and one end of the water return pipe (14) away from the water storage box (5) is connected to the bottom of the placement box (4); The water return pipe (14) is arranged on the upper end surface of the water storage box (5); Filter screens (25) are respectively installed at the connection points between the pipe 1 (11), the pipe 2 (12), the water injection pipe (13), the water return pipe (14) and the water storage box (5).

4. A water jet-ultrasound-assisted laser drilling device according to claim 3, characterized in that: The placement box (4) comprises a box body (15) without a top surface at the upper end, the four side walls inside the box body (15) are respectively integrally provided with support walls (16), drainage holes (17) are formed between adjacent support walls (16), and the clamp (6) is mounted on the upper end surface of the support wall (16) by means of bolts; The bottom of the placement box (4) is provided with a drainage hole (19) connected to the return pipe (14), and the bottom of the placement box (4) is provided with a slope, which is used to guide the waste water so that all the waste water enters the drainage hole (19).

5. The water jet-ultrasound-assisted laser drilling device according to claim 1, characterized in that: One end of the connecting piece (9) is in the shape of a clamp and its clamping force is adjusted by a bolt, and the other end is rotatably provided with an active clamp (20), and the water jet nozzle (7) is inserted into the active clamp (20).

6. The water jet-ultrasound-assisted laser drilling device according to claim 4, characterized in that: The clamp (6) comprises a vibration plate (21), a plurality of ultrasonic vibrators (22) are mounted on the bottom wall of the vibration plate (21) by means of bolts, a plurality of positioning pins (18) are arranged on the upper surface of the vibration plate (21), an upper clamping plate (23) and a lower clamping plate (24) are movably arranged on the positioning pins (18), and an adjusting bolt is arranged between the upper clamping plate (23) and the lower clamping plate (24).

7. A water jet-ultrasound-assisted laser drilling device according to claim 6, characterized in that: The vibration plate (21) is mounted on the upper end surface of the support wall (16) by means of bolts; The vibration plate (21) is a truncated quadrilateral, and its four corners form an annular space with the inner wall of the placement box (4), and the annular space is connected to the corresponding drainage holes (17) up and down to form a water flow channel.

8. The water jet-ultrasound-assisted laser drilling device according to claim 7, characterized in that: The power of the ultrasonic vibrator (22) generator is 100W-800W, and the ultrasonic vibrator (22) is connected to an external control switch via a wire.

9. A method for using an auxiliary laser drilling device, the method for using is based on a water jet-ultrasound-assisted laser drilling device according to any one of claims 1 to 8, characterized in that: The steps include: S1, installing the connecting piece (9), installing one end of the connecting piece (9) in a clamp shape on the laser head (8), and fastening it with bolts, inserting the water jet nozzle (7) into the movable clamp (20); S2, installing a fixture (6), firstly installing a plurality of the ultrasonic vibrators (22) on the bottom of the vibration plate (21) by means of bolts, and then installing the vibration plate (21) on the upper ends of the four supporting walls (16) by means of bolts; S3, installing the workpiece, placing one end of the workpiece between the upper clamping plate (23) and the lower clamping plate (24), positioning the part of the workpiece to be processed outside the upper clamping plate (23) and the lower clamping plate (24), and tightening and fixing the workpiece with the upper clamping plate (23) and the lower clamping plate (24) by adjusting bolts; S4, moving the millisecond laser (2) through the control system to move it above the workpiece, adjusting laser parameters, and preparing for subsequent processing; S5, manually rotating the movable card so that the angle between the water jet nozzle (7) and the vibration plate (21) is between 45° and 60°; S6, turning on the variable frequency water pump (10), and adjusting the water pressure and water flow rate, adjusting the water pressure to less than 1 MPa, the water flow rate to 10 m / s to 20 m / s, and the water jet nozzle (7) to flush the workpiece; S7, turning on the ultrasonic vibrator (22) through an external control switch to make it vibrate, the ultrasonic vibrator (22) drives the clamp (6) to vibrate, the ultrasonic generator power is 100w-800w, and the vibration frequency is 20KHz-60KHz; S8, the millisecond laser (2) starts drilling, and during the drilling process, the water jet nozzle (7) flushes the workpiece. The waste water after flushing enters the drainage hole (17) through the annular space at the four cut corners of the vibration plate (21), and then gathers at the bottom of the placement box (4), and finally enters the water storage box (5) through the return pipe (14), and then is pumped out of the water storage box (5) under the action of the variable frequency water pump (10) and flushes the workpiece again, thereby completing the recycling.

10. The method for using the auxiliary laser drilling device according to claim 9, characterized in that: In step S8, the millisecond laser (2) is used to perform drilling in a circular cutting manner.

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