A high-efficiency and precise indexing and positioning multi-angle uniformly distributed group hole perforation device

Abstract

This invention discloses a high-efficiency and precise indexing and positioning device for drilling multiple evenly distributed holes at multiple angles, relating to the field of drilling tooling. Traditionally, the machining of the nozzle seat group water inlet holes in the spring nozzle assembly of cooling devices mostly involves manual calibration of each hole position, or even processing through pre-marking, visual inspection, and trial cutting, resulting in low workpiece processing efficiency. This invention includes a double-angle vise, a base, an indexing turntable, a fan-shaped hole mold, a drill bushing, a fixing pin, and a lever. The double-angle vise allows for multi-angle adjustment of the vertical plane and the base. The base, in conjunction with the indexing turntable and the fan-shaped hole mold, transforms complex angle holes into vertical machining. The lever rotates the indexing turntable to align with the indexing grooves, and the fixing pin enables rapid positioning. The fan-shaped hole mold is equipped with a drill bushing, which guides and ensures machining accuracy. This device requires no precision instrument calibration, utilizing visual alignment to facilitate rapid machining of multiple evenly distributed holes at multiple angles, effectively improving processing efficiency compared to traditional machining methods.

Description

Technical Field

[0001] This invention relates to the field of perforation tooling, and in particular to a high-efficiency, precise, indexed, and positioned multi-angle uniformly distributed perforation device. Background Technology

[0002] As a core component of the cooling device, the spring nozzle assembly's water output performance directly affects the cooling efficiency. Among these components, the nozzle holder with evenly distributed orifices for water inlet is the key element determining the water output effect. These orifices guide the cooling water flow to generate eddies, causing the water to spiral as it passes through the channels. This significantly increases the centrifugal force of the water output, ultimately achieving excellent atomization.

[0003] The machining accuracy of the evenly distributed orifices on the nozzle seat is a key factor determining the water output performance of the component. Because the orifice group has angular requirements in two directions, traditional machining methods typically use angled fixtures for positioning to achieve a uniform distribution of the orifices. However, this method increases the difficulty of calibration, leading to low machining efficiency. Currently, most factories use a method of calibrating the orifice positions one by one, or even machining through pre-marking, manual visual inspection, and trial cutting, resulting in low machining efficiency and high manufacturing costs. Summary of the Invention

[0004] The technical problem to be solved and the technical task proposed by this invention is to improve and refine existing technical solutions, and to provide a high-efficiency and precise indexing and positioning multi-angle uniformly distributed group hole perforation device, with the aim of improving the processing efficiency of uniformly distributed group holes on the nozzle seat. To this end, this invention adopts the following technical solution.

[0005] A high-efficiency and precise indexing and positioning multi-angle evenly distributed group hole drilling device includes a double-angle vise capable of vertical plane deflection of 0-90° and chassis rotation of 360°, a base, an indexing turntable, a fan-shaped hole mold, a drill bushing, a fixing pin, and a lever. The base includes a cylindrical tooling seat and a jaw fixing part located below it, the jaw fixing part clamping into the jaws of the double-angle vise. The tooling seat has an inner groove in the middle to accommodate the indexing turntable, and the two are rotatably engaged. The tooling seat also has a fan-shaped slot to engage with the fan-shaped hole mold. The indexing turntable has an internal threaded hole in the middle for mating with the external thread on the upper part of the nozzle seat. The outer side of the upper surface of the indexing turntable has radially evenly distributed inner indexing grooves and corresponding number and position lever holes. The axis of the dial hole is aligned with the axis of the indexing turntable. The dial rod can be inserted into any dial hole. The number and position of the inner indexing groove and dial hole correspond to the number and position of the nozzle seat water inlet hole. The upper surface of the tooling base is provided with an outer indexing groove corresponding to the position of the inner indexing groove. The side of the indexing turntable is provided with a lateral positioning hole corresponding to the position and number of dial holes. The fan-shaped die is provided with a lateral through hole that matches the positioning hole. The fixing pin is inserted into the positioning hole through the lateral through hole. The upper end of the fan-shaped die is provided with a correction angle surface, and a through drill sleeve hole is provided perpendicularly to the correction angle surface. The drill sleeve is fixed in the drill sleeve hole, and a through guide hole is provided in the middle of the drill sleeve. When the correction angle surface is horizontal, the axis of the drill sleeve hole coincides with the axis of one water inlet hole of the nozzle seat.

[0006] This device uses a double-angle vise to achieve multi-angle linkage adjustment between the vertical plane and the chassis, which can easily adjust the machining angle position of the nozzle seat to the water inlet. The cooperation structure of the base, indexing turntable, and fan-shaped die transforms complex angle holes into vertical machining, reducing the requirements for machine tools and improving versatility and machining stability. The internal and external indexing grooves, locating holes, and positioning holes enable quick visual alignment without the need for precision instrument calibration. After machining one water inlet, the indexing turntable can be easily rotated using a lever to rotate the next water inlet to the through hole position, and then fixed by the lateral positioning pin for machining. It can easily and quickly complete the rapid machining of multiple evenly distributed holes of the nozzle seat in sequence. Compared with the traditional machining mode of manually calibrating the hole position one by one, it can quickly and efficiently realize the machining of multiple holes, significantly improving the machining efficiency of multiple holes.

[0007] As a preferred technical means: the inner groove of the tooling base is a stepped groove, and the fan-shaped slot of the tooling base is a 90-degree through slot, with the bottom of the fan-shaped slot flush with the bottom of the stepped groove. The indexing turntable includes an upper plate with the aforementioned adjusting hole and a lower plate with the aforementioned positioning hole. The upper plate of the indexing turntable is located above the stepped surface, and the outer diameter of the lower plate is smaller than that of the upper plate. The lower plate of the indexing turntable is located below the stepped surface and rotatably engages with the inner sidewall of the step below the stepped surface and with the lower inner sidewall of the fan-shaped die. This achieves a rotatable engagement structure for the indexing turntable, and the 90-degree slot facilitates processing and positioning installation.

[0008] As a preferred technical approach: the lower inner part of the fan-shaped die has an inner lower sidewall, which is the bottom of the inner groove in the lower inner part of the fan-shaped die. The upper plate of the indexing turntable extends into the inner groove, with a gap between it and the inner lower sidewall. A gap is also left between the upper plate of the indexing turntable and the outer wall of the step above the step surface of the tooling seat. Reasonable gap control can reduce frictional loss, extend the service life of the device, facilitate the installation and disassembly of parts, and ensure the flexible rotation of the indexing turntable.

[0009] As a preferred technical means: the upper plate of the indexing turntable has an internally threaded hole, and the lower plate of the indexing turntable has an inverted internally stepped hole for mating with the flange of the lower part of the nozzle seat. The combination of the internally threaded hole and the internally stepped hole of the indexing turntable can firmly fix the nozzle seat, ensuring the stability of the workpiece position during processing. The precise fit with the flange of the nozzle seat can further limit the axial and radial movement of the workpiece, effectively avoiding hole position deviations caused by workpiece loosening, and improving processing quality and yield.

[0010] As a preferred technical approach, the inner middle part of the fan-shaped die is provided with an inner upper sidewall, and a gap is left between the inner upper sidewall and the upper outer periphery of the nozzle seat. Compared with rotational mating, this avoids direct contact between the two and the resulting wear, and reduces the machining accuracy requirements of the inner upper sidewall.

[0011] As a preferred technical means: the upper surface of the tooling base is flush with the upper surface of the indexing turntable; the cross-sections of the inner and outer indexing grooves are identical isosceles triangles with the apex pointing downwards; and the inner indexing groove is located radially outside the dial hole. This makes visual alignment more intuitive and convenient, allowing operators to quickly determine the indexing position.

[0012] As a preferred technical means, the jaw fixing part of the base has a square structure. It forms a stable clamping relationship with the jaws of the double-angle vise. Compared with other shapes, the square structure distributes the force more evenly, is less prone to displacement after clamping, and the simple shape reduces the processing difficulty and cost of the base, while ensuring the overall rigidity and stability of the device.

[0013] As a preferred technical means, the drill bushing and the drill bushing hole of the fan-shaped die are interference fit, and the lower outer periphery of the drill bushing is provided with a tapered chamfer. This facilitates guidance during drill bushing installation.

[0014] As a preferred technical means, the upper end of the drill bushing is provided with an inverted two-stage stepped surface, namely an upper outer stepped surface and a lower inner stepped surface. The outer diameter of the lower inner stepped surface is 4-6 mm larger than the diameter of the drill bushing hole, and the outer diameter of the upper outer stepped surface is 9-11 mm larger than the outer diameter of the lower inner stepped surface. The height difference between the two stepped surfaces is 5-10 mm. The two-stage stepped surface structure at the upper end of the drill bushing facilitates the application of force by tools during disassembly.

[0015] As a preferred technical approach, the diameter of the guide hole is the same as the diameter of the water inlet hole of the nozzle seat. This allows for precise guidance of the drill bit through the drill bushing, eliminating the need for secondary diameter calibration and ensuring the dimensional accuracy of the hole. It also reduces subsequent processing or assembly problems caused by diameter deviations, thereby improving processing efficiency.

[0016] Beneficial effects: This device achieves multi-angle linkage adjustment between the vertical plane and the chassis through a double-angle vise, which can easily adjust the machining angle position of the nozzle seat to the water inlet hole. The cooperation structure of the base, indexing turntable, and fan-shaped die transforms complex angle holes into vertical machining, reducing the requirements for machine tools and improving versatility and machining stability. The internal and external indexing grooves, locating holes, and positioning holes enable quick visual alignment without the need for precision instrument calibration. After machining one water inlet hole, the indexing turntable can be easily rotated using a lever to rotate the next water inlet hole to the through hole position, and then fixed by the lateral positioning pin for machining. It can easily and quickly complete the rapid machining of multi-angle evenly distributed holes in the nozzle seat, which significantly improves the machining efficiency of multiple holes compared to the traditional manual machining mode of calibrating the hole position one by one. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the present invention.

[0018] Figure 2 This is a top view of the present invention.

[0019] Figure 3 This is the present invention. Figure 2 A-A sectional view, excluding the double-angle vise.

[0020] Figure 4 This is a schematic diagram of the base structure in this invention.

[0021] Figure 5 This is a schematic diagram of the indexing turntable structure in this invention.

[0022] Figure 6 This is a schematic diagram of the sector-shaped die structure in this invention.

[0023] Figure 7 This is a schematic diagram of the drill sleeve structure in this invention.

[0024] Figure 8 This is a schematic diagram of the nozzle seat structure in this invention.

[0025] In the diagram: 1. Double-angle vise; 2. Base; 3. Indexing turntable; 4. Sector-shaped hole mold; 5. Drill bushing; 6. Fixing pin; 7. Dial lever; 8. Nozzle seat; 201. Tooling base; 202. Jaw fixing part; 203. Inner groove; 204. Sector-shaped groove; 205. Outer indexing groove; 301. Internal threaded hole; 302. Inner indexing groove; 303. Dial hole; 304. Positioning hole; 305. Upper plate; 306. Lower plate; 401. Lateral through hole; 402. Correction angle surface; 403. Drill bushing hole; 404. Inner lower side wall; 405. Inner middle lower side wall; 406. Inner middle upper side wall; 501. Guide hole; 502. Upper outer stepped surface; 503. Lower inner stepped surface; 504. Arc groove; 801. Water inlet hole; 802. Flange. Detailed Implementation

[0026] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings.

[0027] Example 1

[0028] like Figures 1 to 8As shown, a high-efficiency and precise indexing and positioning multi-angle evenly distributed group hole drilling device includes a double-angle vise 1, a base 2, an indexing turntable 3, a fan-shaped hole mold 4, a drill bushing 5, a fixing pin 6, and a lever 7. The double-angle vise 1 can rotate 0-90° in the vertical plane and the base can rotate 360°. The base 2 includes a cylindrical tooling seat 201 and a jaw fixing part 202 located below the tooling seat 201. The jaw fixing part 202 is used to clamp and fix it at the jaw of the double-angle vise 1. The tooling seat 201 has a middle part for accommodating the indexing turntable 3. The inner groove 203 of the indexing turntable 3 and the inner groove 203 of the tooling base 201 are rotatably matched. The tooling base 201 is provided with a fan-shaped slot 204 for matching with the fan-shaped die 4. The middle of the indexing turntable 3 is provided with an internal threaded hole 301 for matching with the external thread on the upper part of the nozzle seat 8. The outer side of the upper surface of the indexing turntable 3 is provided with radially distributed inner indexing grooves 302 and corresponding to the position and number of the inner indexing grooves 302. The axial direction of the axial direction of the axial direction of the indexing turntable 3 is consistent with that of the indexing turntable 3. The lever 7 can be inserted into one of the levers. In hole 303, the number of inner indexing grooves 302 and the number of dipping holes 303 correspond to the number and position of water inlet holes 801 of nozzle seat 8. The upper surface of tooling base 201 is provided with an outer indexing groove 205 corresponding to the position of the inner indexing grooves 302 on the surface of indexing turntable 3. The upper surface of tooling base 201 is flush with the upper surface of indexing turntable 3. The side of indexing turntable 3 is provided with a lateral positioning hole 304 corresponding to the position and number of dipping holes 303. The fan-shaped die 4 is provided with a lateral through hole 4 corresponding to the position and size of the positioning hole 304. 01. The fixing pin 6 is inserted into the positioning hole 304 through the lateral through hole 401 provided in the fan-shaped die 4. The upper end of the fan-shaped die 4 is provided with a correction angle surface 402, and the correction angle surface 402 is provided with a through drill sleeve hole 403 perpendicular to it. The drill sleeve 5 is fixed in the drill sleeve hole 403. The drill sleeve 5 is provided with a through guide hole 501 in the middle for precisely guiding the drill bit of the water inlet hole 801 of the nozzle seat 8. When the correction angle surface 402 is horizontal, the central axis of the drill sleeve hole 403 coincides with the central axis of one water inlet hole 801 of the nozzle seat 8.

[0029] To achieve the rotating mating structure, the inner groove 203 of the tooling base 201 is a stepped groove, and the fan-shaped slot 204 of the tooling base 201 is a 90-degree slot that penetrates both inside and outside. The bottom of the fan-shaped slot 204 is flush with the bottom of the stepped groove, and the upper end is open. The indexing turntable 3 includes an upper plate 305 with a dial hole 303 and a lower plate 306 with a positioning hole 304. The upper plate 305 of the indexing turntable 3 is located above the stepped surface, and the outer diameter of the lower plate 306 is smaller than that of the upper plate 305. The lower plate 306 of the indexing turntable 3 is located below the stepped surface and rotates and mates with the inner sidewall of the step below the stepped surface and the inner lower sidewall 404 of the fan-shaped die 4. In this embodiment, the outer diameter of the upper plate 305 of the indexing turntable 3 is 100mm, the height of the upper plate 305 is 12mm, the outer diameter of the lower plate 306 is 73mm, the height of the lower plate 306 is 15mm, the diameter of the positioning hole 304 and the dial hole 303 are both 8mm, the number of water inlet holes 801 of the nozzle seat 8 is 12, and the number of dial holes 303 and positioning holes 304 are both 12. This structure realizes the stable rotation and cooperation of the indexing turntable 3, and the 90-degree groove facilitates processing and positioning installation.

[0030] To ensure the smooth rotation of the indexing turntable 3, an inner lower sidewall 405 is provided on the lower inner side of the fan-shaped die 4. The inner lower sidewall 405 is the bottom of the inner groove provided in the lower inner part of the fan-shaped die 4. The upper plate part 305 of the indexing turntable 3 extends into the inner groove, and a gap is left between it and the inner lower sidewall 405. A gap is also left between the upper plate part 305 of the indexing turntable 3 and the outer sidewall of the step above the step surface of the tooling seat part 201. An inner upper sidewall 406 is provided on the middle inner side of the fan-shaped die 4, and a gap is left between the inner upper sidewall 406 and the upper outer periphery of the nozzle seat 8. Reasonable gap control can avoid frictional wear, extend the service life of the device, and facilitate the processing, installation and disassembly of parts, ensuring the smooth rotation of the indexing turntable 3.

[0031] To secure the nozzle holder 8, the upper plate portion 305 of the indexing turntable 3 has an internally threaded hole 301, and the lower plate portion 306 of the indexing turntable 3 has an inverted internally stepped hole for mating with the flange 802 at the bottom of the nozzle holder 8. When installing the nozzle holder 8, it is screwed into the internally threaded hole 301 from bottom to top and tightened completely. The flange 802 at the bottom of the nozzle holder 8 then mates with the internally stepped hole. The combination of the internally threaded hole 301 and the internally stepped hole on the indexing turntable 3 securely fixes the nozzle holder 8, ensuring stable workpiece position during machining. The precise fit with the flange 802 of the nozzle holder 8 further restricts axial and radial movement of the workpiece, effectively preventing hole position deviations caused by workpiece loosening, and improving machining quality and yield.

[0032] To simplify the fixing structure of the jaw fixing part 202, the jaw fixing part 202 of the base 2 has a square structure. It forms a stable clamping relationship with the jaws of the double-angle vise 1. Compared with other shapes, the square structure distributes the force more evenly, is less prone to displacement after clamping, and the simple shape reduces the processing difficulty and cost of the base 2, while ensuring the overall rigidity and stability of the device.

[0033] To achieve precise guidance, the diameter of the guide hole 501 is the same as the diameter of the water inlet hole 801 of the nozzle seat 8. According to the processing requirements, the guide hole 501 adopts an upper tolerance, which can directly guide the drill bit for processing through the drill bushing 5 without secondary calibration of the hole diameter, ensuring the dimensional accuracy of the hole; reducing subsequent processing or assembly problems caused by hole diameter deviation, and improving processing efficiency.

[0034] During installation, first open the jaws using the screw handle of the double-angle vise 1, then insert the square jaw fixing part 202 of the base 2 into the jaws, align it, and clamp it with the screw handle. Next, install the nozzle seat 8. Screw the nozzle seat 8 from bottom to top into the internal threaded hole 301 of the indexing turntable 3 and tighten it in place. Then, insert the assembly from top to bottom into the inner groove 203 of the tooling seat part 201 of the base 2. Next, insert the fan-shaped die 4 into the fan-shaped slot 204, then insert the lever 7 into the lever hole 303. Rotate until the inner indexing groove 302 aligns with the outer indexing groove 205. Then, insert the fixing pin 6 laterally into the lateral through hole 401 of the fan-shaped die 4 (with the drill sleeve 5 already assembled), and then into the positioning hole 304 to achieve positioning and fixing of the indexing turntable 3. Adjust the horizontal rotation angle and vertical plane angle of the double-angle vise 1 to the predetermined angles, so that the correction angle surface 402 is in a horizontal state.

[0035] Adjust the machine tool so that the drill bit is aligned with the guide hole 501 of the drill sleeve 5, and then the water inlet hole 801 can be machined. After machining one water inlet hole 801, pull out the fixing pin 6, use the lever 7 to rotate the indexing turntable 3 so that the outer indexing groove 205 is aligned with the next inner indexing groove 302, and then insert the fixing pin 6 into the fixed indexing turntable 3 to machine the next water inlet hole 801. Complete the machining of all water inlet holes 801 in this way. In this embodiment, the fixing pin 6 is provided with a pin handle for easy insertion and removal.

[0036] This device uses a double-angle vise 1 to achieve multi-angle linkage adjustment between the vertical plane and the chassis, which can easily adjust the machining angle position of the nozzle seat 8 to the water inlet hole 801. The cooperation structure of the base 2, indexing turntable 3, and fan-shaped hole mold 4 transforms complex angle holes into vertical machining, reducing the requirements for machine tools and improving versatility and machining stability. The inner indexing groove 302, outer indexing groove 205, and the dial hole 303 and positioning hole 304 enable quick visual alignment without the need for precision instrument calibration. After machining one water inlet hole 801, the dial 3 can be easily rotated using the lever 7 to rotate the next water inlet hole 801 to the through hole position, and then the fixing pin 6 is used for lateral positioning and machining. This device can easily and quickly complete the rapid machining of multiple evenly distributed holes in the nozzle seat 8, which significantly improves the machining efficiency of multiple holes compared to the traditional manual machining mode of calibrating the hole position one by one.

[0037] Example 2

[0038] Unlike the above embodiment, as Figure 4 , Figure 5 As shown, the cross-sections of the inner indexing groove 302 and the outer indexing groove 205 are identical isosceles triangles with the apex pointing downwards. The inner indexing groove 302 is located radially outside the dial hole 303. The use of triangular scale grooves makes visual alignment more intuitive and convenient, allowing operators to quickly determine the indexing position.

[0039] Example 3

[0040] Unlike embodiments one or two above, the drill bushing 5 and the drill bushing hole 403 of the fan-shaped die 4 are interference-fitted, and the lower outer periphery of the drill bushing 5 is provided with a tapered chamfer. Using an interference fit for fixing simplifies the structure, avoids the need for a larger fixing part when using bolts, and results in a relatively compact overall size. This reduces the processing difficulty and cost of the base 2, while ensuring the overall rigidity and stability of the device. The tapered chamfer at the lower end of the drill bushing 5 facilitates guidance during installation.

[0041] For ease of disassembly, such as Figure 3 , Figure 5 As shown, the upper end of the drill bushing 5 has an inverted two-stage stepped surface, namely an upper outer stepped surface 502 and a lower inner stepped surface 503. The outer diameter of the lower inner stepped surface 503 is 5 mm larger than the diameter of the drill bushing hole 403, and the outer diameter of the upper outer stepped surface 502 is 10 mm larger than the outer diameter of the lower inner stepped surface 503. The height difference between the two stepped surfaces is 5 mm. The two-stage stepped surface structure at the upper end of the drill bushing 5 facilitates the application of force by tools during disassembly. The inner sidewall of the lower inner stepped surface 503 has an arc-shaped groove 504 to avoid assembly interference.

[0042] The above-described efficient and precise indexing and positioning multi-angle uniformly distributed group hole perforation device is a specific embodiment of the present invention, which has demonstrated the substantial features and progress of the present invention. Based on the actual needs of use, equivalent modifications in shape, structure, etc., can be made to it under the guidance of the present invention, all of which are within the scope of protection of this solution.

Claims

1. A high-efficiency and precise indexing and positioning multi-angle uniformly distributed group hole perforation device, characterized in that: The system includes a double-angle vise capable of vertical plane deflection from 0 to 90° and chassis rotation of 360°, a base, an indexing turntable, a fan-shaped die, a drill bushing, a fixing pin, and a lever. The base includes a cylindrical tooling seat and a jaw fixing part located below it, the jaw fixing part clamping the jaws of the double-angle vise. The tooling seat has an inner groove in the middle to accommodate the indexing turntable, and the two are rotatably coupled. The tooling seat also has a fan-shaped slot to mate with the fan-shaped die. The indexing turntable has an internal threaded hole in the middle for mating with the external thread on the upper part of the nozzle seat. The outer side of the upper surface of the indexing turntable has radially distributed inner indexing grooves and corresponding number and position of lever holes, the axis of which is axial with the axis of the indexing turntable. The lever can be inserted into any of the dial holes, and the number and position of the inner indexing grooves and dial holes correspond to the number and position of the nozzle seat water inlet holes. The upper surface of the tooling base is provided with an outer indexing groove corresponding to the position of the inner indexing groove. The side of the indexing turntable is provided with a lateral positioning hole corresponding to the position and number of dial holes. The fan-shaped die is provided with a lateral through hole that matches the positioning hole. The fixing pin is inserted into the positioning hole through the lateral through hole. The upper end of the fan-shaped die is provided with a correction angle surface, and the correction angle surface is provided with a through drill sleeve hole perpendicular to it. The drill sleeve is fixed in the drill sleeve hole, and the drill sleeve is provided with a through guide hole in the middle. When the correction angle surface is horizontal, the axis of the drill sleeve hole coincides with the axis of one water inlet hole of the nozzle seat. The inner groove of the tooling seat is a stepped groove, and the fan-shaped slot of the tooling seat is a 90-degree slot that penetrates both inside and outside. The bottom of the fan-shaped slot is flush with the bottom of the stepped groove. The indexing turntable includes an upper plate with the dial hole and a lower plate with the positioning hole. The upper plate of the indexing turntable is located above the stepped surface, and the outer diameter of the lower plate is smaller than that of the upper plate. The lower plate of the indexing turntable is located below the stepped surface and rotates and matches with the inner sidewall of the step below the stepped surface and the inner lower sidewall of the fan-shaped die.

2. The high-efficiency and precise indexing and positioning multi-angle uniformly distributed group hole perforation device according to claim 1, characterized in that: The lower inner part of the fan-shaped die has an inner lower sidewall, which is the bottom of the inner groove in the lower inner part of the fan-shaped die. The upper plate of the indexing turntable extends into the inner groove and leaves a gap with the inner lower sidewall. A gap is left between the upper plate of the indexing turntable and the outer sidewall of the step above the step surface of the tooling seat.

3. The efficient and precise indexing and positioning multi-angle uniformly distributed group hole perforation device according to claim 2, characterized in that: The upper plate of the indexing turntable has an internal threaded hole, and the lower plate of the indexing turntable has an inverted internal stepped hole for matching with the flange of the lower part of the nozzle seat.

4. The high-efficiency and precise indexing and positioning multi-angle uniformly distributed group hole perforation device according to claim 3, characterized in that: The inner middle part of the fan-shaped die is provided with an inner upper sidewall, and a gap is left between the inner upper sidewall and the upper outer periphery of the nozzle seat.

5. The efficient and precise indexing and positioning multi-angle uniformly distributed group hole perforation device according to claim 4, characterized in that: The upper surface of the tooling base is flush with the upper surface of the indexing turntable. The cross-sections of the inner and outer indexing grooves are identical isosceles triangles with the apex pointing downwards. The inner indexing groove is located on the radial outer side of the dial hole.

6. The efficient and precise indexing and positioning multi-angle uniformly distributed group hole perforation device according to claim 1, characterized in that: The clamp fixing part of the base has a square structure.

7. The efficient and precise indexing and positioning multi-angle uniformly distributed group hole perforation device according to claim 5, characterized in that: The drill bushing and the drill bushing hole of the fan-shaped die are interference fit, and the lower outer periphery of the drill bushing is provided with a tapered chamfer.

8. The high-efficiency and precise indexing and positioning multi-angle uniformly distributed group hole perforation device according to claim 7, characterized in that: The upper end of the drill bushing is provided with an inverted two-stage stepped surface, namely an upper outer stepped surface and a lower inner stepped surface. The outer diameter of the lower inner stepped surface is 4-6 mm larger than the diameter of the drill bushing hole, and the outer diameter of the upper outer stepped surface is 9-11 mm larger than the outer diameter of the lower inner stepped surface. The height difference between the two stepped surfaces is 5-10 mm.

9. The high-efficiency and precise indexing and positioning multi-angle uniformly distributed group hole perforation device according to claim 8, characterized in that: The diameter of the guide hole is the same as the diameter of the water inlet hole of the nozzle seat.

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