Precision integrated machining system and method for machining tangential hole-type centrifugal micro-nozzle

Abstract

The application provides a precision integrated machining system and method for machining tangential hole type centrifugal micro nozzle, which comprises the following steps: firstly, rough turning the end face and the outer circle of the bar stock clamped by the spindle tool system, then machining the tangential micro hole by the tangential micro hole drilling system, machining the coaxial flow channel hole, the part end face and the outer circle clamping face by the spindle tool system, repeating the machining and feed, removing the burrs at the inlet and outlet of the tangential micro hole, then driving the secondary spindle chuck to clamp the outer circle clamping face, rotating the spindle and the secondary spindle synchronously, machining the remaining outer circle by the spindle tool system until the part is cut off from the bar stock, clamping the cut-off part by the secondary spindle chuck, machining the cut-off end by the secondary spindle tool and removing the machining burrs. The application has small error and high production efficiency compared with the traditional machining method.

Description

Technical Field

[0001] This invention relates to the field of process technology for machining tangential orifice centrifugal nozzles, specifically to a precision integrated machining system and method for machining tangential orifice centrifugal micro nozzles. Background Technology

[0002] A tangential-orifice centrifugal micro-nozzle comprises a coaxial inner flow channel and an outer positioning surface, as well as tangential micro-orifices whose walls are tangential to the inner flow channel. Liquid flows in through the tangential micro-orifices, rotating at high speed downstream along the wall of the inner flow channel. The coaxial flow channel gradually contracts, increasing the rotational angular velocity of the liquid flow and the centrifugal force it experiences, until it is atomized and ejected from the outlet. Factors such as the tangential accuracy between the tangential micro-orifices and the inner flow channel, the uniformity of the distribution of the tangential micro-orifices around the axis of the inner flow channel, and the coaxiality of different sections of the inner flow channel all affect the smoothness and uniformity of the downstream rotational flow of the liquid.

[0003] One method is to first machine the coaxial flow channel hole on a lathe, and then use a machining center or a special drilling jig to machine the tangential hole. The advantage is that it ensures the coaxiality of the coaxial flow channel hole. The disadvantage is that it requires machining the tangential hole under double clamping conditions, and repeated clamping errors can lead to tangential errors. Furthermore, when drilling through the tangential hole, the drill bit can only bear force on one side, inevitably causing some bending, which also leads to tangential errors. These two errors, in particular, will cause the tangential accuracy of micro-nozzles to fail to meet requirements. In addition, burrs at the intersection of the tangential hole and the inner flow channel are extremely difficult to remove; slight carelessness can scratch the flow channel wall, affecting the flow quality.

[0004] Utility model patent CN207272735U discloses a universal tooling for manufacturing tangential holes in centrifugal nozzles, which relies on quick-change drill bushings to guide the drill bit in machining the tangential holes. This method requires the workpiece with pre-machined coaxial flow channel holes to be clamped and aligned again on the machine tool, which cannot avoid repeated clamping errors and drilling errors caused by drill bit bending.

[0005] Utility model patent CN206824766U discloses a deburring tool for tangential holes, which can remove burrs during tangential hole machining without scratching the inner wall of the nozzle cavity. Utility model patent CN209256705U also discloses a deburring tool for tangential holes, which, in addition to removing burrs, can also grind and polish the inner cavity of the nozzle. These two patents illustrate that removing burrs from tangential holes is a specialized technology, requiring highly skilled tools and expertise, and necessitating specialized personnel using dedicated tools. If burr removal can be completed by CNC equipment during the machining process, production efficiency can be significantly improved while ensuring the consistency of deburring quality.

[0006] Another method is to clamp the machine on a machining center once, drill and bore the coaxial inner and outer surfaces, and drill tangential micro-holes. The advantage is that it helps to meet the tangential accuracy requirements, and the burrs of the tangential holes can be removed by repeated drilling and boring. The disadvantage is that it is very difficult to drill and bore the coaxial inner and outer surfaces of the micro-nozzle, resulting in low production efficiency. In addition, there will be repeated positioning errors and tool change errors on the drilling and boring axes each time the tool is changed. From the perspective of machining principle, the coaxiality of the inner flow channel hole will inevitably be affected.

[0007] A novel method involves placing a nozzle with pre-machined coaxial flow channel holes on a laser drilling machine to process tangential micro-holes. Patent CN113492770B discloses an apparatus and method for processing tangential holes in a nozzle using a femtosecond laser. This method excels at processing micro-holes and can ensure the straightness of the tangential micro-holes at the tangential point. However, this method still suffers from tangential errors caused by repeated clamping, and requires a special stop to prevent laser burns to the hole wall opposite the tangential hole exit. Summary of the Invention

[0008] To address the shortcomings of existing technologies, the purpose of this invention is to provide a precision integrated machining system and method for machining tangential orifice-type centrifugal micro nozzles.

[0009] A precision integrated machining system for machining tangential hole-type centrifugal micro-nozzles according to the present invention includes a spindle chuck 5, a tangential micro-hole drilling system 7, a spindle tool system 8, a counterspindle chuck 9, and a counterspindle tool 10, wherein:

[0010] The spindle chuck 5 is used to hold the bar stock 6 used to prepare the nozzle;

[0011] The tangential micro-hole drilling system 7 is used to machine tangential micro-holes in nozzles;

[0012] The spindle tool system 8 is used to machine the coaxial flow channel hole of the nozzle, the end face of the part, and the outer cylindrical clamping surface, and to cut the nozzle off the bar stock 6;

[0013] The auxiliary shaft chuck 9 is used to clamp the outer cylindrical clamping surface, and the auxiliary shaft chuck 9 can rotate synchronously with the main shaft chuck 5;

[0014] The secondary spindle tool 10 cuts off the nozzle.

[0015] Preferably, the tangential micro-hole drilling system 7 includes an end mill 14, a centering drill 13, an electric high-frequency spindle 11, and a micro-hole drill bit 12, wherein:

[0016] The end mill 14, centering drill 13 and electric high-frequency spindle 11 are radially mounted on the tangential micro-hole drilling system 7 and located on the side of the machine tool spindle;

[0017] The micro-hole drill bit 12 is mounted on the electric high-frequency spindle 11;

[0018] The end mill 14 and the centering drill 13 sequentially machine the drilling platform 28 and the centering hole 29 on the roughing outer circle; the electric high-frequency spindle 11 drives the micro-hole drill bit 12 to rotate at high speed, drilling from the centering hole to the micro-hole 3.

[0019] Preferably, the spindle tool system 8 includes a parting cutter 15, an external grooving cutter 16, a small hole centering drill 17, a small hole drill 18, a small hole reamer 19, a right-hand cutting small turning tool 20, a left-hand cutting small turning tool 21, an external turning tool 24, a spindle boring tool 25, a centering drill 26, and a forming drill 27, wherein:

[0020] External turning tool 24 rough turns the end face and outer diameter of bar stock 6;

[0021] 26. Centering drill, 27. Forming drill, 25. Spindle boring tool, 17. Small hole centering drill, 18. Small hole drill, 19. Small hole reamer for machining coaxial flow channel holes 2;

[0022] External turning tool 24 finishes the end face and external turning clamping face 4;

[0023] The outer grooving tool 16 rough-turns the remaining outer grooving structure, the right cutting tool 20 and the left cutting tool 21 complete the finishing turning, and the cutting tool 15 cuts off the part.

[0024] Preferably, the counterspindle tool 10 includes a counterspindle drill bit 22 and a counterspindle boring tool 23, wherein:

[0025] The counterspindle drill bit 22 and counterspindle boring tool 23 are installed parallel to the axis of the counterspindle chuck 9 to cut the cut-off end of the nozzle held on the counterspindle chuck 9.

[0026] Preferably, the tangential micro-hole drilling system 7 and the spindle tool system 8 repeatedly pass through the tool to remove burrs at the inlet and outlet of the tangential micro-hole 3.

[0027] Preferably, the maximum output speed of the electric high-frequency spindle 11 is not less than 30,000 rpm.

[0028] Preferably, the end mill 14 and the centering drill 13 are driven by the machine tool transmission chain, with a maximum output speed of not less than 5000 rpm.

[0029] Preferably, the end mill 14 can be replaced with a keyway end mill.

[0030] Preferably, the main spindle tool system 8 and the secondary spindle tool 12 are equipped with a number of tools, and the specifications and number of tools can be adjusted according to the structural changes of the tangential orifice type centrifugal micro nozzle 1.

[0031] A method for a precision integrated machining system based on the above-described machining of a tangential bore centrifugal micro-nozzle, according to the present invention, includes the following steps:

[0032] Step S1: The spindle tool system 8 rough turns the end face and outer diameter of the bar stock;

[0033] Step S2: Tangential micro-hole drilling system 7 finishes tangential micro-hole 3;

[0034] Step S3: Use the spindle tool system 8 to finish machine the coaxial flow channel hole, the end face of the part and the outer cylindrical clamping surface. Repeat the finishing process to remove burrs at the inlet and outlet of the tangential micro-hole.

[0035] Step S4: Repeat the finishing pass using the tangential micro-hole drilling system (7) and the spindle tool system (8) to remove burrs at the inlet and outlet of the tangential micro-hole;

[0036] Step S5: Drive the counterspindle chuck 9 to clamp the outer cylindrical clamping surface. The main spindle and counterspindle rotate synchronously. Use the main spindle tool system 8 to turn the remaining outer diameter until the part is cut off from the bar stock 6.

[0037] Step S6: The counterspindle chuck 9 holds the cut-off part, and the counterspindle cutter 10 processes the cut-off end and removes the burrs.

[0038] Compared with the prior art, the present invention has the following beneficial effects:

[0039] 1. This invention can complete the machining of coaxial flow channel holes and tangential micro holes on a single turning center. It can ensure from the machining principle that the coaxiality error of the axis of each coaxial flow channel hole is no greater than Φ0.01mm, while eliminating the tangential error between the tangential micro holes and the coaxial flow channel holes caused by repeated clamping errors.

[0040] 2. The present invention adopts a process arrangement of drilling tangential micro-holes first and then machining coaxial flow channel holes, which avoids the disadvantage that the drill bit can only be subjected to force in one direction when drilling through the tangential hole. Therefore, the drill bit will not bend due to lateral force, ensuring the straightness of the tangential hole axis and eliminating the tangential error between the tangential micro-hole and the coaxial flow channel hole caused by the bending of the micro-hole drill bit under unidirectional force.

[0041] 3. The present invention uses a repeated cutting method to remove burrs from the intersecting holes of the tangential holes and the coaxial inner flow channels, avoiding the tedious work of manual deburring and eliminating the quality instability of manual operation.

[0042] 4. The present invention uses the main spindle chuck and the auxiliary spindle chuck to simultaneously clamp the workpiece and rotate it synchronously for processing, which can avoid the overall deformation of the part under the action of cutting force and ensure that the coaxiality error of the outer circle axis relative to the coaxial flow channel hole axis is no greater than Φ0.01mm;

[0043] 5. This invention uses a main spindle chuck and a secondary spindle chuck to hold the workpiece in sequence, completing all the machining of the tangential hole-type centrifugal micro-nozzle in one go, avoiding the need to transfer parts between machine tools, and thus achieving high production efficiency. Attached Figure Description

[0044] Other features, objects, and advantages of the present invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0045] Figure 1 This is an isometric schematic diagram of the precision integrated machining system of the present invention.

[0046] Figure 2 This is an isometric sectional view of the drilling process of tangential micro-holes during spindle locking according to the present invention.

[0047] Figure 3 This is an axial section diagram of the deburring process of the forming drill during repeated deburring in this invention.

[0048] Figure 4 This is an isometric schematic diagram of machining an outer circle when the main spindle and the secondary spindle of the present invention rotate synchronously.

[0049] Figure 5 This is an isometric cross-sectional schematic diagram of the processing effect of the present invention.

[0050] In the picture:

[0051] Tangential orifice type centrifugal micro nozzle 1; coaxial flow channel orifice 2; tangential micro orifice 3

[0052] 4. Outer cylindrical clamping surface; 5. Spindle chuck; 6. Bar stock.

[0053] 7 Tangential micro-hole drilling system 8 Spindle tool system 9 Counterspindle chuck

[0054] 10 Sub-spindle tool; 11 Electric high-frequency spindle; 12 Micro-hole drill bit

[0055] 13 Centering drill, 14 End mill, 15 Parting cutter

[0056] External grooving cutter 16, Small hole centering drill 17, Small hole drill 18

[0057] Small hole reamer 19; Right-hand cutting small lathe tool 20; Left-hand cutting small lathe tool 21

[0058] 22. Counterspindle drill bit; 23. Counterspindle boring tool; 24. External turning tool.

[0059] Spindle boring tool 25, centering drill 26, form drill 27

[0060] Drilling plane 28, centering hole 29 Detailed Implementation

[0061] The present invention will now be described in detail with reference to specific embodiments. These embodiments will help those skilled in the art to further understand the present invention, but do not limit the invention in any way. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present invention. These all fall within the protection scope of the present invention.

[0062] like Figures 1 to 5 As shown, according to the present invention, a precision integrated machining system and method for machining tangential hole type centrifugal micro nozzles is provided. Specifically, the end face and outer circle of the bar stock 6 held by the spindle chuck 5 are first rough-machined using the spindle tool system 8, and then the tangential micro hole 3 is finished using the tangential micro hole drilling system 7. The coaxial flow channel hole 2, the end face of the part and the outer circle clamping surface 4 are finished using the spindle tool system 8. The finishing process is repeated to remove burrs at the inlet and outlet of the tangential micro hole 3. Then, the sub-spindle chuck 9 is driven to clamp the outer circle clamping surface 4. The spindle and sub-spindle rotate synchronously. The remaining outer circle is machined using the spindle tool system 8 until the part is cut off from the bar stock 6. The sub-spindle chuck 9 holds the cut-off part, and the cut-off end is machined by the sub-spindle tool 10 to remove machining burrs.

[0063] The tangential micro-hole drilling system 7, which finishes the tangential micro-hole 3, includes an end mill 14, a centering drill 13, an electric high-frequency spindle 11, and a micro-hole drill 12. The end mill 14, centering drill 13, and electric high-frequency spindle 11 are radially mounted on the side of the machine tool spindle, and the micro-hole drill 12 is mounted on the electric high-frequency spindle 11. First, the end mill 14 and centering drill 13 are used to sequentially machine the drilling platform 28 and the centering hole 29 on the rough-machined outer diameter. The electric high-frequency spindle 11 drives the micro-hole drill 12 to rotate at high speed, drilling the tangential micro-hole 3 from the centering hole.

[0064] The main spindle tool system 8 is used to finish the coaxial flow channel hole 2, the end face of the part and the outer cylindrical clamping surface 4, including: a cut-off tool 15, an outer cylindrical grooving tool 16, a small hole centering drill 17, a small hole drill 18, a small hole reamer 19, a right-hand cutting small turning tool 20, a left-hand cutting small turning tool 21, an outer cylindrical turning tool 24, a main spindle boring tool 25, a centering drill 26, and a forming drill 27. First, use the external turning tool 24 to rough turn the end face and outer circle of the bar stock 6. After the tangential micro-hole 3 is machined, use the centering drill 26, forming drill 27, spindle boring tool 25, small hole centering drill 17, small hole drill 18, and small hole reamer 19 to machine the coaxial flow channel hole 2. Then, use the external turning tool 24 to finish turn the end face and outer circle clamping surface 4. After removing the burrs at the inlet and outlet of the tangential micro-hole, use the counterspindle chuck 9 to clamp the outer circle clamping surface 4. The spindle chuck 5 and the counterspindle chuck 9 rotate synchronously. Use the external grooving tool 16 to rough turn the remaining outer circle structure. Then, use the right-cutting small turning tool 20 and the left-cutting small turning tool 21 to finish turning. Finally, use the cutting tool 15 to cut off the part.

[0065] The process of repeatedly performing finishing operations to remove burrs at the inlet and outlet of the tangential micro-hole 3 includes: repeatedly performing finishing operations according to the processing sequence to remove machining burrs at the inlet and outlet of the tangential micro-hole 3, wherein the drilling point of the centering drill 13 needs to be adjusted from the original centering hole 29 to the inlet of the tangential micro-hole 3.

[0066] The counterspindle tool 10 includes a counterspindle drill 22 and a counterspindle boring tool 23. The counterspindle drill 22 and the counterspindle boring tool 23 are mounted parallel to the axis of the counterspindle chuck and are used to cut the lower end of the tangential hole-type centrifugal micro-nozzle held in the counterspindle chuck.

[0067] Figure 2 The process of drilling the tangential micro-hole 3 when the spindle is locked is demonstrated. After drilling the drilling platform 28 and the centering hole 29 sequentially on the rough-machined outer circle, the electric high-frequency spindle 11 drives the micro-hole drill bit 12 to rotate at high speed, drilling the tangential micro-hole 3 from the centering hole.

[0068] Figure 3 This demonstrates the process of removing burrs inside the coaxial flow channel hole 2 using a form drill 27 during repeated deburring. After removing the burrs inside the tangential micro-hole 3, the form drill 27 is repeatedly driven along the drilling path of the coaxial flow channel hole 2 to remove the burrs that have returned to the coaxial flow channel hole 2. After completing the machining of the tangential micro-hole and the coaxial flow channel hole, the centering drill, micro-hole drill, form drill, and spindle boring tool repeatedly drive in the machining sequence to remove the machining burrs at the inlet and outlet of the tangential micro-hole. It is necessary to adjust the drilling point of the centering drill from the original drilling platform to the inlet of the tangential micro-hole.

[0069] Figure 4 The process of finishing the outer diameter using a left-hand cutting tool 21 while the main spindle and counterspindle rotate synchronously is demonstrated. The outer diameter clamping surface 4 is held by the counterspindle chuck 9, and the main spindle chuck 5 and counterspindle chuck 9 rotate synchronously. After roughing, the finish turning of part of the outer diameter structure is completed by the left-hand cutting tool 21.

[0070] The electric high-frequency spindle outputs a maximum speed of no less than 30,000 rpm. The end mill and centering drill are driven by the machine tool transmission chain, with a maximum speed of no less than 5,000 rpm. The end mill can be replaced with a keyway cutter. The specifications and quantity of tools in the spindle tool system and the counterspindle tool system are adjusted according to the structural changes of the tangential bore type centrifugal micro-nozzle. A precision integrated machining system for machining tangential bore type centrifugal micro-nozzles is used for the precision integrated machining of these nozzles.

[0071] Figure 5The machining effect and the basic structure of the tangential orifice type centrifugal micro-nozzle 1 are demonstrated. The centrifugal micro-nozzle 1 includes: a coaxial flow channel hole 2, tangential micro-holes 3, and an outer cylindrical clamping surface 4. The coaxial flow channel hole 2 consists of a series of coaxial micro-holes with decreasing diameters, and the coaxiality error between their axes is no greater than Φ0.01mm. The tangential micro-holes 3 consist of one or more micro-holes evenly distributed along the circumference of the coaxial flow channel hole 2, and the tangential error between the hole wall of the tangential micro-hole 3 and the hole wall of the coaxial flow channel hole 2 is 0.06mm. The outer cylindrical clamping surface 4 is both the outer structural surface of the part and the process surface used for clamping the secondary shaft chuck 9 during machining; the coaxiality error between its axis and the axis of the coaxial flow channel hole 2 is no greater than Φ0.01mm. The entire part is composed of... Figure 1 The system completes the processing, and the key processing points are displayed in... Figure 2 , Figure 3 , Figure 4 middle.

[0072] The machining method of the precision integrated machining system for machining tangential orifice-type centrifugal micro nozzles based on the present invention is as follows:

[0073] Step S1: Rough turn the end face and outer diameter of bar stock 6 using external turning tool 24;

[0074] Step S2: Use end mill 14 to machine drilling platform 28 on outer circle, and use centering drill 13 to drill centering hole 29 on drilling platform;

[0075] Step S3: The electric high-frequency spindle 11 drives the micro-hole drill bit 12 to rotate at high speed, drilling from the centering hole to the micro-hole 3;

[0076] Step S4: Use centering drill 26, forming drill 27, spindle boring tool 25, small hole centering drill 17, small hole drill 18, and small hole reamer 19 to machine the coaxial flow channel hole 2;

[0077] Step S5: Use external turning tool 24 to finish turn the end face and the external clamping surface 4;

[0078] Step S6: Adjust the drilling point of the centering drill 13 from the original centering hole 29 to the inlet of the tangential micro hole 3, and drill away the flange at the hole opening;

[0079] Step S7: The electric high-frequency spindle 11 drives the micro-hole drill bit 12 to rotate at high speed, repeating the cutting process once along the axis of the tangential micro-hole 3;

[0080] Step S9: Repeatedly feed the forming drill 27 and spindle boring tool 25 along the surface of the coaxial flow channel hole 2;

[0081] Step S10: Drive the secondary shaft chuck 9 to clamp the outer cylindrical clamping surface 4, and the main shaft chuck 5 and the secondary shaft chuck 9 rotate synchronously;

[0082] Step S11: Rough turn the remaining outer circle structure with the outer grooving cutter 16, and then finish turn with the right cutting small cutting tool 20 and the left cutting small cutting tool 21;

[0083] Step S12: Use the cutting blade 15 to cut the part off the bar stock 6;

[0084] Step S13: The sub-spindle chuck 9 holds the cut-off part, and the cut-off end is machined by the sub-spindle drill (22) and sub-spindle boring tool (23) to remove the machining burrs.

[0085] This invention completes the machining of coaxial flow channel holes and tangential micro-holes on a single turning center. It ensures, from a machining principle perspective, that the coaxiality error of the axes of each coaxial flow channel hole is no greater than Φ0.01mm, while eliminating the tangential error between the tangential micro-holes and the coaxial flow channel holes caused by repeated clamping errors. This invention employs a process arrangement of drilling the tangential micro-holes first, followed by machining the coaxial flow channel holes. This avoids the drawback of the drill bit only being able to withstand force in one direction when drilling through the tangential hole, thus preventing the drill bit from bending due to lateral forces, ensuring the straightness of the tangential hole axis, and eliminating the tangential error between the tangential micro-holes and the coaxial flow channel holes caused by the unidirectional bending of the micro-hole drill bit. This invention employs a repeated feed method to remove burrs from the intersecting holes of the tangential hole and the coaxial inner flow channel, avoiding the tedious work of manual deburring and eliminating the quality instability of manual operation. The invention uses a main spindle chuck and a secondary spindle chuck to simultaneously hold the workpiece and rotate it synchronously for machining, preventing overall deformation of the part under cutting force and ensuring that the coaxiality error of the outer diameter axis relative to the coaxial flow channel hole axis is no greater than Φ0.01mm. By sequentially holding the workpiece with the main spindle chuck and the secondary spindle chuck, this invention completes all machining of the tangential hole-type centrifugal micro-nozzle in one operation, avoiding the need for part transfer between machine tools and resulting in high production efficiency.

[0086] In the description of this application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0087] Specific embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the specific embodiments described above, and those skilled in the art can make various changes or modifications within the scope of the claims, which do not affect the essence of the present invention. Unless otherwise specified, the embodiments and features described in this application can be arbitrarily combined with each other.

Claims

1. A precision integrated machining system for machining tangential orifice-type centrifugal micro-nozzles, characterized in that, Includes a spindle chuck (5), a tangential micro-hole drilling system (7), a spindle tool system (8), a counterspindle chuck (9), and a counterspindle tool (10), wherein: The spindle chuck (5) is used to hold the bar stock (6) for preparing the nozzle; The tangential micro-hole drilling system (7) is used to machine tangential micro-holes in nozzles; The spindle tool system (8) is used to machine the coaxial flow channel hole of the nozzle, the end face of the part and the outer cylindrical clamping surface, and to cut the nozzle off the bar stock (6); The secondary shaft chuck (9) is used to clamp the outer cylindrical clamping surface, and the secondary shaft chuck (9) can rotate synchronously with the main shaft chuck (5); The secondary shaft tool (10) processes the lower end of the nozzle; The tangential micro-hole drilling system (7) includes an end mill (14), a first centering drill (13), an electric high-frequency spindle (11), and a micro-hole drill bit (12), wherein: The end mill (14), the first centering drill (13) and the electric high-frequency spindle (11) are radially mounted on the tangential micro-hole drilling system (7) and located on the side of the machine tool spindle; The micro-hole drill bit (12) is mounted on the electric high-frequency spindle (11); The end mill (14) and the first centering drill (13) sequentially machine the drilling platform (28) and the centering hole (29) on the roughing outer circle; the electric high-frequency spindle (11) drives the micro-hole drill bit (12) to rotate at high speed, drilling from the centering hole to the micro-hole (3). The spindle tool system (8) includes a cut-off tool (15), an external grooving tool (16), a small hole centering drill (17), a small hole drill (18), a small hole reamer (19), a right-hand cutting small turning tool (20), a left-hand cutting small turning tool (21), an external turning tool (24), a spindle boring tool (25), a second centering drill (26), and a forming drill (27), wherein: The external turning tool (24) rough turns the end face and outer diameter of the bar stock (6); Second centering drill (26), forming drill (27), spindle boring tool (25), small hole centering drill (17), small hole drill (18), small hole reamer (19) to process coaxial flow channel hole (2); The external turning tool (24) finishes the end face and the external turning clamping face (4); The outer grooving tool (16) rough turns the remaining outer grooving structure, the right cutting tool (20) and the left cutting tool (21) complete the finishing turning, and the part is cut off by the cut-off tool (15); The secondary spindle tool (10) includes a secondary spindle drill (22) and a secondary spindle boring tool (23), wherein: The counterspindle drill bit (22) and counterspindle boring tool (23) are installed parallel to the axis of the counterspindle chuck (9) to cut the cut end of the nozzle held on the counterspindle chuck (9); The tangential micro-hole drilling system (7) and the spindle tool system (8) repeatedly pass through the tool to remove burrs at the inlet and outlet of the tangential micro-hole (3).

2. The precision integrated machining system for machining tangential orifice-type centrifugal micro-nozzles according to claim 1, characterized in that, The electric high-frequency spindle (11) outputs a maximum speed of not less than 30,000 rpm.

3. The precision integrated machining system for machining tangential orifice-type centrifugal micro-nozzles according to claim 1, characterized in that, The end mill (14) and the first centering drill (13) are driven by the machine tool transmission chain, with a maximum output speed of not less than 5000 rpm.

4. The precision integrated machining system for machining tangential orifice-type centrifugal micro-nozzles according to claim 1, characterized in that, The main spindle tool system (8) and the secondary spindle tool (10) are equipped with several tools, and the tool specifications and quantity can be adjusted according to the structural changes of the tangential hole type centrifugal micro nozzle (1).

5. A method for a precision integrated machining system for machining tangential orifice-type centrifugal micro-nozzles according to any one of claims 1-4, characterized in that, Includes the following steps: Step S1: Spindle tool system (8) rough turns the end face and outer diameter of the bar stock; Step S2: Tangential micro-hole drilling system (7) finishes tangential micro-hole (3); Step S3: Use the spindle tool system (8) to finish machine the coaxial flow channel hole, the end face of the part, and the outer cylindrical clamping surface; Step S4: Repeat the finishing pass using the tangential micro-hole drilling system (7) and the spindle tool system (8) to remove burrs at the inlet and outlet of the tangential micro-hole; Step S5: Drive the secondary shaft chuck (9) to clamp the outer cylindrical clamping surface. The main shaft and the secondary shaft rotate synchronously. Use the main shaft tool system (8) to turn the remaining outer diameter until the part is cut off from the bar stock (6). Step S6: The sub-spindle chuck (9) holds the cut-off part, and the sub-spindle cutter (10) processes the cut-off end and removes the burrs.

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