A device and method for precision small hole machining of tantalum sheet components

Abstract

The present invention provides a device and method for machining precise small holes in tantalum sheet components. The device and method are characterized by comprising a clamping tool assembly, a tantalum sheet, and a CNC machining center. The device increases the drilling speed of a drill in the CNC machining center and utilizes the high speed of a special drill bit to complete precise small hole drilling in tantalum sheet components. The clamping tool assembly can be used to fix the tantalum sheet components in a covering manner, so that the position and size after machining are accurate, the hole shape is complete, and the hole edge is free of deformation and burrs, fully meeting the precise small hole requirements of tantalum sheet components for GDMS.

Description

Technical Field

[0001] The present invention relates to the technical field of precision workpiece processing, and in particular to a device and method for precision small hole processing of tantalum sheet components. Background Art

[0002] Tantalum is a refractory metal material with a high melting point, corrosion resistance, good plasticity, and stable chemical properties. It is widely used in the electronics, chemical, and medical industries. Taking advantage of these excellent properties, tantalum sheet components are used in precision instruments such as glow discharge mass spectrometers (GDMS). These precision instruments require extremely high precision in the shape and size of the components. However, annealed tantalum sheets are soft and tough, which can cause severe adhesion during drilling, resulting in severe drill wear and reduced hole accuracy. In particular, thin-walled tantalum sheets (0.1mm to 1.0mm) are prone to drill breakage, poor hole accuracy, and burrs when drilling precision small holes (φ0.2mm to φ0.8mm) using traditional methods. These problems render the components unusable, leading to high scrap rates and severely impacting the quality of delivered components.

[0003] To achieve the above objectives, the present invention provides a device and method for precision small hole machining of tantalum sheet components, which can solve the problems raised in the above background technology. Summary of the Invention

[0004] The present invention adopts the following technical solutions to achieve:

[0005] A precision small hole processing device for tantalum sheet parts, characterized by comprising a clamping tooling assembly, a tantalum sheet, and a CNC processing center;

[0006] The surface of the tantalum sheet is provided with three threaded holes 2, the threaded holes 2 are distributed in an equilateral triangle, and the center of the tantalum sheet is preset with a precision hole;

[0007] The clamping tool assembly includes a tool 1 and a tool 2. The tool 1 is provided with a processing groove, the processing groove is adapted to the size of the tantalum sheet, the bottom of the processing groove is provided with a precision bottom hole, the precision bottom hole and the precision small hole have the same axial position, the precision bottom hole has a radius larger than the precision small hole, and the bottom of the processing groove is provided with a plurality of threaded holes 1, the plurality of threaded holes 1 and the plurality of threaded holes 2 have the same size and axial position;

[0008] The tooling one is provided with two rows of sliding guide rails arranged opposite to each other, and a plurality of threaded holes three are provided above the tooling two, and the plurality of threaded holes three are the same in size, axis position and number as the threaded holes two. The tooling two is provided with a connecting block at one end close to the processing groove, and a connecting groove is provided on one side of the processing groove. The connecting block and the connecting groove cooperate with each other, and a threaded opening is provided on the connecting block. The connecting groove and the connecting block are connected by bolts. A guide rod is connected to the side of the tooling two away from the processing groove, and the guide rod cooperates with the sliding guide rail. A precision upper hole is provided on the tooling two, and the radius of the precision upper hole is larger than that of the precision small hole, and the axis position of the precision upper hole is the same as that of the precision small hole;

[0009] The CNC machining center includes a controller and a mechanical drill arm, and the mechanical drill arm includes a hydraulic cylinder. The output end of the hydraulic cylinder is fixedly connected to an integrated box. A drilling rig is provided in the integrated box. The output end of the drilling rig passes through the lower surface of the integrated box and is connected to a special drill bit. A plurality of screw motors are provided inside the integrated box. The output ends of the plurality of screw motors are connected to threaded rods, and the threaded rods pass through and extend out of the lower surface of the integrated box. The installation position of the special drill bit is the same as the axial position of the precision hole. The plurality of threaded rods and the plurality of threaded holes have the same axial position and number. The threaded rods are matched with threaded hole one, threaded hole two, and threaded hole three through threads.

[0010] Preferably, a sheet unloading hole is provided at the bottom of the processing tank, and a sheet unloading cylinder is fixedly installed inside the tooling, and the output end of the sheet unloading cylinder has the same size as the sheet unloading hole.

[0011] Preferably, two left-right symmetrical positioning holes are provided on the tantalum sheet, two left-right symmetrical positioning holes are provided above the tooling 2, and two left-right symmetrical positioning holes are provided at the bottom of the processing groove. The positioning hole 1 has the same diameter and position as the positioning hole 2 and the positioning hole 3. Two positioning columns are provided on the lower surface of the integrated box, and the positioning columns cooperate with the positioning hole 2.

[0012] Preferably, the length of the positioning column is greater than the length of the threaded rod, and the length of the threaded rod is greater than the length of the special drill bit.

[0013] Preferably, a cooling pipe running through the upper and lower parts is provided in the integrated box, a solenoid valve is connected to the top of the cooling pipe, a water inlet pipe is connected to the other end of the solenoid valve, and the guide direction of the outlet end of the cooling pipe matches the position of the special drill bit.

[0014] Preferably, two symmetrical water guide grooves are provided inside the tooling 1, one end of the water guide groove is connected to the side wall of the processing groove, and the other end of the water guide groove is connected to the side wall of the tooling 1.

[0015] Preferably, an auxiliary platform is provided under the clamping tooling assembly, and the auxiliary platform includes a fixed platform and a collection box. The fixed platform is fixedly installed inside the collection box. The upper surface of the collection box is designed to be open. A collection trough is formed between the four sides of the fixed platform and the upper surface of the collection box. A drainage pipe is provided on one side of the collection box.

[0016] Preferably, the four corners of the tooling are provided with fixing holes, the four inner corners of the fixing platform are provided with electric cylinders, the output end of the electric cylinder is provided with a fixing column, and the size of the fixing column matches that of the fixing hole.

[0017] A method for precision small hole machining of tantalum sheet components comprises the following steps:

[0018] S1. Positioning: Place the tantalum sheet into the processing groove, slide the second tool so that the connecting block fits into the connecting groove, and then fix it with studs. Install the first tool to the fixed platform so that the through hole on the first tool fits into the fixed column.

[0019] S2. Fixing: After installing the special drill bit, start the hydraulic cylinder to move the integrated box downward. At this time, the positioning column passes through positioning hole 1, positioning hole 2, and positioning hole 3 in sequence. At the same time, start the screw motor to make the threaded rod pass through threaded hole 1, threaded hole 2, and threaded hole 3 in sequence to fix the box.

[0020] S3, Drilling: Control the CNC machining center to start the drill, open and rotate it, control the solenoid valve to open, spray cutting fluid at the fixed tooling, and gradually increase the drill speed to 8000-12000 rpm while the integrated box moves down. Set the feed speed to 10mm / min, start the machining program, and complete the drilling process.

[0021] S4. Disassembly and assembly: Remove tool 2, control the unloading cylinder to push upward through the controller to make the tantalum sheet detach, use the precision needle gauge and projector to measure the aperture size and position, and complete the precision small hole processing of tantalum sheet parts.

[0022] Preferably, in step S2 and step S3, the threaded rod is connected to the threaded hole 3 through the control of the CNC machining center, and the surface of the special drill bit tantalum sheet is in contact. At this time, the drilling rig speed has reached the appropriate speed range of 8000-12000 rpm.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] The present invention increases the drilling speed through a CNC machining center, utilizes the high speed of a special drill bit to complete the drilling of precise small holes in tantalum sheet components, and can fix the tantalum sheet components in a covering manner through a clamping tooling assembly, so that the position and size after processing are accurate, the hole shape is complete, and the hole edge is free of deformation and burrs, fully meeting the requirements of tantalum sheet components for GDMS for precise small holes, greatly improving the qualification rate of tantalum sheet components, and effectively saving the processing cost and processing time of tantalum sheet components. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of the tantalum sheet, tooling 2, and processing tank of the present invention;

[0026] Figure 2 It is a top view of the structure of the tantalum sheet, tooling 2, and processing tank of the present invention;

[0027] Figure 3 It is a partial structural diagram of the tooling 1 and the auxiliary table of the present invention;

[0028] Figure 4 It is a schematic diagram of the partial structure of the tooling 1 and the auxiliary platform of the present invention;

[0029] Figure 5 It is a cross-sectional view of the structure of the present invention;

[0030] Figure 6 This is a schematic diagram of the integrated box structure of the present invention;

[0031] Figure 7 This is a cross-sectional view of a workpiece 1 of the present invention.

[0032] In the figure: 1. Clamping fixture assembly; 2. Tantalum sheet; 3. CNC machining center; 4. Auxiliary table;

[0033] 101. Tooling 1; 102. Tooling 2; 103. Water guide trough; 104. Processing trough; 105. Precision bottom hole; 106. Threaded hole 1; 107. Sliding guide rail; 108. Threaded hole 3; 109. Connecting block; 110. Threaded opening; 111. Connecting trough; 112. Guide rod; 113. Precision top hole; 114. Discharge hole; 115. Discharge cylinder; 116. Positioning hole 2; 117. Positioning hole 3.

[0034] 201, threaded hole 2; 202, precision hole; 203, positioning hole 1;

[0035] 301. Mechanical drill arm; 302. Hydraulic cylinder; 303. Controller; 304. Integrated box; 305. Drilling rig; 306. Special drill bit; 307. Screw motor; 308. Threaded rod; 309. Positioning column; 310. Solenoid valve; 311. Cooling pipe; 312. Water inlet pipe;

[0036] 401. Fixed platform; 402. Collection box; 403. Collection trough; 404. Drain pipe; 405. Fixing hole; 406. Electric cylinder; 407. Fixed column. DETAILED DESCRIPTION

[0037] To facilitate understanding of the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings. Several embodiments of the present invention are given in the drawings. However, the present invention can be implemented in different forms and is not limited to the embodiments described in the text. On the contrary, these embodiments are provided to make the content disclosed in the present invention more thorough and comprehensive.

[0038] It should be noted that when an element is referred to as being "fixed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used in this article are for illustrative purposes only.

[0039] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly used by those skilled in the art to which the present invention pertains. The terms used in the specification of the present invention are for the purpose of describing specific embodiments only and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0040] The present invention will be further described in detail below with reference to the accompanying drawings.

[0041] Please refer to the attached Figure 1-7 , including a clamping tooling assembly 1, a tantalum sheet 2, and a CNC machining center 3;

[0042] The tantalum sheet 2 is provided with three threaded holes 201 arranged in an equilateral triangle on the upper surface of the tantalum sheet 2. A precision hole 202 is preset in the center of the tantalum sheet 2. The precision hole 202 is a hole that requires special processing. The triangular distribution of threaded holes can prevent the tantalum sheet 2 from being displaced during processing, which would increase the scrap rate. The aperture range of the precision hole 202 is 0.2mm to 0.8mm.

[0043] The clamping tool assembly 1 includes a tool 101 and a tool 2 102. The tool 101 is provided with a processing groove 104. The processing groove 104 is adapted to the size of the tantalum sheet 2. The thickness of the processing groove 104 is the same as the thickness of the tantalum sheet 2, which facilitates preliminary edge fixation. A precision bottom hole 105 is provided at the bottom of the processing groove 104. The precision bottom hole 105 is located at the same position as the precision small hole 202. The radius of the precision bottom hole 105 is larger than that of the precision small hole 202. The radius of the precision bottom hole 105 is 1 mm. A plurality of threaded holes 106 are provided at the bottom of the processing groove 104. The plurality of threaded holes 106 are the same size and position as the plurality of threaded holes 201. The threaded holes 106 and the threaded holes 201 are both M4 threaded holes.

[0044] Two rows of sliding guide rails 107 are provided on the tooling 101, and a plurality of threaded holes 108 are provided on the top of the tooling 102. The plurality of threaded holes 108 are the same in size and position as the threaded holes 201. The threaded holes 108 and the threaded holes 201 are both M4 threaded holes. A connecting block 109 is provided on one end of the tooling 102 near the processing groove 104. A connecting groove 111 is provided on one side of the processing groove 104. The connecting block 109 and the connecting groove 111 cooperate with each other. A threaded opening 109 is provided on the connecting block 109. 10. The connecting groove 111 is connected to the connecting block 109 by bolts, which facilitates the locking of the second tooling 102 to achieve covering fixation of the tantalum sheet 2. The side of the second tooling 102 away from the processing groove 104 is connected to a guide rod 112. The guide rod 112 cooperates with the sliding guide rail 107. The second tooling 102 is provided with a precision upper hole 113. The radius of the precision upper hole 113 is larger than the precision small hole 202. The radius of the precision upper hole 113 is 10 mm, and the axis position of the precision upper hole 113 is the same as that of the precision small hole 202.

[0045] The CNC machining center 3 includes a controller 303 and a mechanical drill arm 301. The mechanical drill arm 301 includes a hydraulic cylinder 302. An integrated box 304 is fixedly connected to the bottom of the hydraulic cylinder 302. A drilling rig 305 is arranged in the integrated box 304. The output end of the drilling rig 305 passes through the lower surface of the integrated box 304 and is connected to a special drill bit 306. The model and specification of the special drill bit 306 are determined by the size of the aperture to be processed. A plurality of screw motors 307 are arranged inside the integrated box 304. The output ends of the plurality of screw motors 307 are connected to the screws. The threaded rod 308 extends through the lower surface of the integrated box 304. The installation position of the special drill bit 306 is the same as the position of the precision hole 202. The multiple threaded rods 308 are in the same position as the multiple threaded holes 108. The threaded rod 308 is matched with the threaded hole 106, the threaded hole 201, and the threaded hole 3 108 through threads. Before drilling downward, the threaded rod 308 is first slowly rotated to connect the tooling 2 102, the tantalum sheet 2, and the tooling 1 101 to fix the tantalum sheet 2 in advance.

[0046] Please refer to Figure 7 A sheet unloading hole 114 is provided at the bottom of the processing groove 104, and a sheet unloading cylinder 115 is fixedly installed inside the tooling 101. The output end of the sheet unloading cylinder 115 is the same size as the sheet unloading hole 114, which is convenient for pushing out the tantalum sheet 2 after the drilling is completed.

[0047] Please pay attention to Figure 1-5 Two left-right symmetrical positioning holes 203 are provided on the tantalum sheet 2, two left-right symmetrical positioning holes 116 are provided above the second tooling 102, and two left-right symmetrical positioning holes 117 are provided at the bottom of the processing groove 104. The positioning holes 203 have the same diameter and position as the positioning holes 116 and 117. Two positioning posts 309 are provided on the lower surface of the integrated box 304. The positioning posts 309 cooperate with the second positioning holes 116. The cooperation between the positioning holes and the positioning posts 309 can prevent relative sliding between the second tooling 102, the tantalum sheet 2, and the first tooling 101.

[0048] Please pay attention to Figure 5 The length of the positioning column 309 is greater than the length of the threaded rod 308, and the length of the threaded rod 308 is greater than the length of the special drill bit 306. The positioning column 309 is first preliminarily positioned, and the threaded rod 308 is secondarily locked, and then the drilling process is performed.

[0049] Please pay attention to Figure 5 A cooling pipe 311 is provided in the integrated box 304, which runs through the top and bottom. A solenoid valve 310 is connected to the top of the cooling pipe 311, and a water inlet pipe 312 is connected to the other end of the solenoid valve 310. The guide direction of the outlet end of the cooling pipe 311 matches the position of the special drill bit 306. The cutting fluid is sprayed before the drilling action occurs to improve the wetness of the drill hole and prevent burrs.

[0050] Please pay attention to Figure 3 、 Figure 4 、 Figure 7 Two symmetrical water guide grooves 103 are provided inside the tooling 101. One end of the water guide groove 103 is connected to the side wall of the processing groove 104, and the other end of the water guide groove 103 is connected to the side wall of the tooling 101. The liquid inside the processing groove 104 can be discharged through the water guide groove 103, which is convenient for cleaning.

[0051] Please pay attention to Figure 3-5 An auxiliary platform 4 is provided under the clamping tooling assembly 1. The auxiliary platform 4 includes a fixed platform 401 and a collection box 402. The fixed platform 401 is fixedly installed inside the collection box 402. The upper surface of the collection box 402 is designed to be open. A collection trough 403 is formed between the four sides of the fixed platform 401 and the upper surface of the collection box 402. A drain pipe 404 is provided on one side of the collection box 402, and the cutting fluid can be discharged centrally through the collection trough 403.

[0052] Please pay attention to Figure 1 Fixing holes 405 are provided at the four corners of tooling 101, electric cylinders 406 are provided at the four corners inside the fixing platform 401, and a fixing column 407 is provided at the output end of the electric cylinder 406. The size of the fixing column 407 matches that of the fixing hole 405, and the fixing column 407 can perform primary fixation on the tantalum sheet 2.

[0053] A method for machining a precision small hole 202 of a tantalum sheet type 2 component comprises the following steps:

[0054] S1. Positioning: Place the tantalum sheet 2 into the processing groove 104 , slide the second tool 102 so that the connecting block 109 on the second tool 102 fits into the connecting groove 111 , and then secure it with studs. Install the first tool 101 onto the fixed platform 401 so that the through hole on the first tool 101 fits into the fixing post 407 ;

[0055] S2. Fixing: After installing the special drill bit 306, start the hydraulic cylinder 302 to move the integrated box 304 downward. At this time, the positioning column 309 passes through the positioning hole 1 203, the positioning hole 2 116, and the positioning hole 3 117 in sequence. At the same time, start the screw motor 307, so that the threaded rod 308 passes through the threaded hole 106, the threaded hole 201, and the threaded hole 3 108 in sequence, playing a fixing role.

[0056] S3, drilling: Control the CNC machining center 3 to start the drill 305 and rotate it, control the solenoid valve 310 to open, spray cutting fluid towards the fixed tooling, and gradually increase the speed of the drill 305 to 8000-12000 rpm while the integrated box 304 moves downward. Set the feed rate to 10 mm / min, start the machining program, and complete the drilling process;

[0057] S4. Disassembly and assembly: Remove the second tool 102, and control the unloading cylinder 115 to push upward through the controller 303 to separate the tantalum sheet 2. Use a precision needle gauge and a projector to measure the aperture size and position, and complete the precision small hole 202 processing of the tantalum sheet 2 type component.

[0058] In step S2 and step S3, the threaded rod 308 is connected to the threaded hole 3 108 through the control of the CNC machining center 3, while the special drill bit 306 contacts the surface of the tantalum sheet 2, and the speed of the drill rig 305 has reached the appropriate speed range of 8000-12000 rpm.

[0059] The working principle of the present invention is:

[0060] The tantalum sheet and its two components were loaded into tooling 101. Tooling 102 was placed over the surface of the tantalum sheet 2. Connecting block 109 and connecting slot 111 were screwed securely. The fixture was then mounted on fixed platform 401 within CNC machining center 3. A custom drill bit 306 was installed in integrated box 304. The machining program was set via the control box. Zeroing and tool setting were performed via CNC machining center 3. The screw motor 307 was activated, locking threaded holes 106, 2, and 3. Simultaneously, positioning posts 309 were extended into positioning holes 103, 203, and 116 to control the horizontal position of the tantalum sheet 2. The drilling rig 305 of CNC machining center 3 was activated, and cutting fluid was sprayed onto the fixture. The spindle speed was increased to 8,000 to 12,000 rpm, and the feed rate was set to 10 mm / min. The machining program was then activated to complete the drilling process. After the drilling process is completed, the tooling 102 is removed, and the unloading lever is started to push the tantalum sheet type 2 components out of the through hole on the back. The aperture size and position are measured using a precision pin gauge and a projector to complete the precision small hole 202 processing of the tantalum sheet type 2 components. At this time, the precision small hole 202 processed is accurate in size, complete in hole shape, and has a high yield rate.

[0061] The above description of the present invention is exemplified in conjunction with the accompanying drawings. It is obvious that the specific implementation of the present invention is not limited to the above-mentioned method. As long as such non-substantial improvements are made using the method concept and technical solution of the present invention, or the concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the scope of protection of the present invention.

Claims

1. A device for machining a precision small hole (202) of a tantalum sheet (2) type component, characterized in that: It includes a clamping tool assembly (1), a tantalum sheet (2), and a CNC machining center (3); The surface of the tantalum sheet (2) is provided with three threaded holes (201), the threaded holes (201) are distributed in an equilateral triangle, and a precision small hole (202) is preset in the center of the tantalum sheet (2); The clamping tool assembly (1) includes tool one (101) and tool two (102), wherein the tool one (101) is provided with a processing groove (104), wherein the processing groove (104) is adapted to the size of the tantalum sheet (2), wherein a precision bottom hole (105) is provided at the bottom of the processing groove (104), wherein the precision bottom hole (105) and the precision small hole (202) have the same axial position, wherein the radius of the precision bottom hole (105) is larger than that of the precision small hole (202), wherein a plurality of threaded holes (106) are provided at the bottom of the processing groove (104), wherein the plurality of threaded holes (106) have the same size and axial position as the plurality of threaded holes (201); The tooling 1 (101) is provided with two rows of sliding guide rails (107) arranged opposite to each other, and the tooling 2 (102) is provided with a plurality of threaded holes 3 (108) above, and the plurality of threaded holes 3 (108) are the same in size and axis position as the threaded holes 2 (201), and the tooling 2 (102) is provided with a connecting block (109) at one end close to the processing groove (104), and a connecting groove (111) is provided on one side of the processing groove (104), and the connecting block (109) and the connecting groove (111) cooperate with each other, and the connecting block (109) ) is provided with a threaded opening (110), the connecting groove (111) and the connecting block (109) are connected by bolts, the side of the tooling (102) away from the processing groove (104) is connected with a guide rod (112), the guide rod (112) and the sliding guide rail (107) cooperate with each other, and the tooling (102) is provided with a precision upper hole (113), the radius of the precision upper hole (113) is larger than the precision small hole (202), and the axial position of the precision upper hole (113) is the same as that of the precision small hole (202); The CNC machining center (3) includes a controller (303) and a mechanical drill arm (301). The mechanical drill arm (301) includes a hydraulic cylinder (302). The output end of the hydraulic cylinder (302) is fixedly connected to an integrated box (304). A drilling rig (305) is provided in the integrated box (304). The output end of the drilling rig (305) passes through the lower surface of the integrated box (304) and is connected to a special drill bit (306). A plurality of screw motors (307) are provided inside the integrated box (304). The output ends of the plurality of screw motors (307) are connected to threaded rods (308), the threaded rods (308) extend through the lower surface of the integrated box (304), the installation position of the special drill bit (306) is the same as the axial position of the precision small hole (202), the plurality of threaded rods (308) are in the same position as the plurality of threaded holes (108), and the threaded rods (308) are matched with the threaded hole (106), the threaded hole (201), and the threaded hole (108) through threads.

2. The device for machining a precision small hole (202) of a tantalum sheet (2) type component according to claim 1, characterized in that: A sheet unloading hole (114) is provided at the bottom of the processing groove (104), and a sheet unloading cylinder (115) is fixedly installed inside the tooling (101), and the output end diameter of the sheet unloading cylinder (115) is the same as the aperture of the sheet unloading hole (114).

3. The device for machining a precision small hole (202) of a tantalum sheet (2) type component according to claim 1, characterized in that: The tantalum sheet (2) is provided with two left-right symmetrical positioning holes (203), the upper portion of the tooling (102) is provided with two left-right symmetrical positioning holes (116), the bottom portion of the processing groove (104) is provided with two left-right symmetrical positioning holes (117), the aperture and axis position of the positioning hole (203) are the same as those of the positioning hole (116) and the positioning hole (117), and the lower surface of the integrated box (304) is provided with two positioning columns (309), and the positioning columns (309) cooperate with the positioning hole (116).

4. The device for machining a precision small hole (202) of a tantalum sheet (2) type component according to claim 3, characterized in that: The length of the positioning column (309) is greater than the length of the threaded rod (308), and the length of the threaded rod (308) is greater than the length of the special drill bit (306).

5. The device for machining a precision small hole (202) of a tantalum sheet (2) type component according to claim 1, characterized in that: A cooling pipe (311) is provided in the integrated box (304) and is connected to the top of the cooling pipe (311). The other end of the solenoid valve (310) is connected to a water inlet pipe (312). The guide direction of the outlet end of the cooling pipe (311) matches the position of the special drill bit (306).

6. The device for machining a precision small hole (202) of a tantalum sheet (2) type component according to claim 1, characterized in that: Two symmetrical water guide grooves (103) are provided inside the tooling one (101), one end of the water guide groove (103) is connected to the side wall of the processing groove (104), and the other end of the water guide groove (103) is connected to the side wall of the tooling one (101).

7. The device for machining a precision small hole (202) of a tantalum sheet (2) type component according to claim 3, characterized in that: An auxiliary platform (4) is provided below the clamping tool assembly (1), and the auxiliary platform (4) comprises a fixed platform (401) and a collection box (402). The fixed platform (401) is fixedly installed inside the collection box (402), and the upper surface of the collection box (402) is designed to be open. A collection trough (403) is formed between the surrounding of the fixed platform (401) and the upper surface of the collection box (402), and a drainage pipe (404) is provided on one side of the collection box (402).

8. The device for machining a precision small hole (202) of a tantalum sheet (2) type component according to claim 7, characterized in that: The four corners of the tooling (101) are provided with fixing holes (405), the four inner corners of the fixed platform (401) are provided with electric cylinders (406), the output end of the electric cylinder (406) is provided with a fixing column (407), and the size of the fixing column (407) matches that of the fixing hole (405).

9. A method for machining a precision small hole (202) of a tantalum sheet (2) type component, using a precision small hole (202) machining device for a tantalum sheet (2) type component as claimed in claim 8, characterized in that: The following steps are involved: S1. Positioning: Place the tantalum sheet (2) into the processing groove (104), slide the second tool (102) so that the connecting block (109) matches the connecting groove (111), and then fix it with a stud. Install the first tool (101) to the fixed platform (401) so that the through hole on the first tool (101) matches the fixed column (407); S2. Fixing: Install the special drill bit (306), start the hydraulic cylinder (302) to move the integrated box (304) downward, at which time the positioning column (309) passes through the positioning hole 1 (203), positioning hole 2 (116), and positioning hole 3 (117) in sequence. At the same time, start the screw motor (307) to make the threaded rod (308) pass through the threaded hole 1 (106), threaded hole 2 (201), and threaded hole 3 (108) in sequence. S3, drilling: Control the CNC machining center (3) to start the drilling machine (305) to start and rotate, control the solenoid valve (310) to open, spray cutting fluid towards the fixed tooling, start the drilling machine (305) while the integrated box (304) moves downward, set the feed speed through the controller (303), start the processing program, and complete the drilling process; S4. Disassembly and assembly: Remove the second tool (102), and control the unloading cylinder (115) to push upward through the controller (303) to separate the tantalum sheet (2). Use a precision needle gauge and a projector to measure the aperture size and position, and complete the precision small hole (202) processing of the tantalum sheet (2) and other parts.

10. A method for machining a precision small hole (202) of a tantalum sheet (2) type component according to claim 9, characterized in that: In step S2 and step S3, the threaded rod (308) is connected to the threaded hole three (108) through the control of the CNC machining center (3), while the special drill bit (306) contacts the surface of the tantalum sheet (2).

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