High-precision beryllium aluminum alloy drilling device

Abstract

The invention belongs to the technical field of drilling devices, particularly relates to a high-precision beryllium aluminum alloy drilling device, and aims to solve the problem that a combined drilling and deburring device in the prior art is time-consuming and labor-consuming in use, the following scheme is provided: the high-precision beryllium aluminum alloy drilling device comprises an operation table, and a mounting notch is formed in the position, close to the rear side, of the upper surface of the operation table; a main supporting slide rail is fixed in the mounting notch; a cylindrical sliding block is connected into a sliding groove of the main supporting sliding rail in a sliding mode. A drilling machine body extending to the position above the center of the operation table is fixed to the side, away from the groove bottom, of the cylindrical sliding block, and a center round hole is formed in the position, under the drilling machine body, of the middle of the operation table. And a deburring mechanism is arranged on the lower surface, close to the central round hole, of the operation table. The abrasive paper ring can be rapidly attached to the drilling position while the drill bit is removed upwards, the operation that repositioning is needed in traditional deburring is omitted, the polishing pressure can be adjusted along with lifting of the cylindrical sliding block, operation is easy, and the fault rate is low.

Description

Technical Field

[0001] The present invention relates to the technical field of drilling devices, and particularly to a high-precision beryllium-aluminum alloy drilling device. Background Art

[0002] As a high-performance lightweight alloy, beryllium-aluminum alloy is commonly used in aerospace, electronics, and high-strength structures. Drilling is a common process in the processing of beryllium-aluminum alloy. However, due to its special physical properties, the use of worn or dull drill bits during the drilling process often leads to hole wall breakage and burr generation. If these burrs are not removed in time, stress concentration may be caused, reducing the fatigue life of the component.

[0003] After retrieval, most of the existing drilling devices are provided with a separate deburring mechanism on the operating table. However, when deburring the drilling position, this deburring mechanism needs to first turn the profile over, then move the drilling position to the grinding position, and then adjust the downward pressure of the grinding mechanism to be appropriate before grinding can be carried out. This deburring method is time-consuming and laborious, and has low efficiency. Therefore, we propose a new integrated drilling and deburring device. Summary of the Invention

[0004] Aiming at the technical problem that the combined drilling and deburring device in the prior art is time-consuming and laborious to use, the present invention adopts the following technical solutions: A high-precision beryllium-aluminum alloy drilling device, including an operating table. An installation slot is opened on the upper surface of the operating table near the rear side, and a main support slide rail is fixed in the installation slot. A cylindrical slider is slidably connected in the chute of the main support slide rail. One side of the cylindrical slider away from the slot bottom is fixed with a drilling machine body extending above the center of the operating table. A central circular hole is opened in the middle of the operating table directly below the drilling machine body. A deburring mechanism is arranged on the lower surface of the operating table near the central circular hole. The deburring mechanism includes two symmetrically arranged rotating shaft rod frames fixed on the lower surface of the operating table. The same worm wheel disk two is rotatably connected between the two rotating shaft rod frames. An inclined transmission pipe with an axis passing through the center of the central circular hole is arranged on the circumferential outer wall of the worm wheel disk two. The upper and lower ends of the transmission pipe are respectively fixed with a fixed umbrella head and a small gear one. A sandpaper ring is fixed on the circumferential outer wall of the top end of the fixed umbrella head. A vertical rack top rod is fixed on the lower surface of the cylindrical slider. A shaft rod seat three is fixed on the lower surface of the operating table near the bottom end of the rack top rod. A transmission rod one is rotatably connected in the middle of the shaft rod seat three. A worm gear sleeve and a helical gear are respectively fixed at both ends of the transmission rod one. The helical gear meshes with the rack top rod.

[0005] Preferably, a grinding motor is fixed near the bottom end of the side surface of the second worm wheel disc, and a driving gear is fixed to the top end of the output shaft of the grinding motor. The driving gear meshes with the first pinion; a self-locking screw hole is formed at the top end of the transmission pipe, and an adjusting stud adapted to the self-locking screw hole is reserved at the bottom end of the fixed umbrella head. According to the overall rotation amplitude of the deburring mechanism, the extension length of the fixed umbrella head is adjusted, and then the drilling position is ground at the most suitable grinding angle.

[0006] Preferably, the aperture of the central circular hole is larger than the diameter of the sandpaper ring, and a fillet is formed at the edge of one end of the central circular hole; this can prevent the sandpaper ring from grinding the operating table during grinding.

[0007] Preferably, a fixed pulley bracket is fixed to the side of the bottom end of the main support slide rail near the rack ejector rod, and a grooved fixed pulley is arranged on the fixed pulley bracket. The groove of the grooved fixed pulley is stuck on the circumferential outer wall of the rack ejector rod, and the grooved fixed pulley is located on the side away from the helical gear; this can tightly attach the rack ejector rod to the helical gear during use, ensuring that the rack ejector rod can accurately drive the deburring mechanism to rotate a specific angle, and then generate a more accurate grinding pressure.

[0008] Preferably, a return spring is fixed to the lower surface of the cylindrical slider, and a spring support block is fixed to the bottom end of the return spring. A vertical rope hole is reserved in the middle of the spring support block, and the circumferential outer wall of the spring support block is fixed to the inner wall of the main support slide rail.

[0009] Preferably, two horizontal bearing seats are fixed to the rear side of the operating table near the lower part of the main support slide rail, and the same winding roller is rotatably connected between the two bearing seats. The same pulling rope is wound around the circumferential outer wall of the winding roller; a shaft seat one is fixed to the side of the main support slide rail near the top end, and a horizontal shaft is fixed to the side of the shaft seat one away from the main support slide rail. A pressing handle in the shape of a ginkgo leaf is rotatably connected to the horizontal shaft. The pressing handle includes a fan-shaped part and a handle part; and the fan-shaped part of the pressing handle is located above the winding roller. A rope groove is formed on the arc surface of the fan-shaped part of the pressing handle, and the two ends of the pulling rope are respectively fixed to the lower surface of the cylindrical slider and the top end of the rope groove; when it is necessary to pull down the cylindrical slider, just press down the end of the pressing handle away from the fan-shaped part.

[0010] Preferably, a shaft hole one adapted to the horizontal shaft is formed in the middle of the pressing handle, and a limiting convex rod is fixed to the end of the pressing handle near the handle part. A limiting block is reserved above the limiting convex rod on the side surface of the shaft seat one; by setting the limiting block, the upper limit position of the pressing handle can be limited.

[0011] Preferably, the upper surface of the operating table is in a rectangular structure, and two strip-shaped holes that are parallel to each other and symmetrically distributed about the central circular hole are opened near the middle of the operating table. The length direction of the strip-shaped holes is consistent with the width direction of the operating table; and positioning mechanisms are arranged in both of the two strip-shaped holes; each positioning mechanism includes a U-shaped bearing bracket that is fixed below the strip-shaped hole with an upward-opening U-shaped structure in the middle. A vertical short shaft is rotatably connected in the U-shaped bearing bracket, and a driven gear and a first worm wheel disc are respectively fixed at the upper and lower ends of the short shaft. On the lower surface of the top plate of the operating table, symmetric fixed rails are respectively fixed on both sides near the strip-shaped holes, and rack push rods that are symmetrically distributed about the center are respectively slidably connected in the two fixed rails; tooth surfaces that are meshed with the driven gears are reserved on one side of the two rack push rods facing each other; and hexagonal blocks that are symmetrically distributed about the center are respectively fixed at the ends of the two rack push rods away from each other. The six rectangular side surfaces of the hexagonal blocks are perpendicular to the vertical plane, and threaded holes are opened in the middle of the rectangular side surfaces near the top end and the driven gear of the hexagonal blocks. Single-headed studs are screwed in the two topmost threaded holes; on the lower surface of the operating table, near the sides of the two first worm wheel discs, the same double-headed worm is arranged, and the double-headed worm is simultaneously meshed with the two first worm wheel discs; anti-slip grooves that are adapted to the fixed rails are opened on one side of the two rack push rods facing away from each other.

[0012] Preferably, a second shaft seat is fixed near the front on the lower surface of the operating table, and a second transmission rod is rotatably connected in the second shaft seat. A rocker and a first driven bevel gear are respectively fixed at the two ends of the second transmission rod, and a second driving bevel gear that is meshed with the first driven bevel gear is arranged at the end of the double-headed worm; just by rotating the rocker, the two single-headed studs can be driven to form an opening and closing action.

[0013] Preferably, an internal hexagonal hole is opened at the top end of the single-headed stud; cooperating with the two obliquely inward threaded holes, a downward clamping force can be formed during clamping, effectively preventing clamping from falling off.

[0014] The beneficial effects in the present invention are as follows: 1. By arranging a deburring mechanism rotatably connected below the central circular hole and cooperating with a rack ejector rod that forms a linkage with the cylindrical slider, the sandpaper ring can be quickly attached to the drilling position while withdrawing the drill bit upward, eliminating the need for repositioning in traditional deburring. Moreover, the grinding pressure can be adjusted as the cylindrical slider is lifted, with simple operation and low failure rate.

[0015] 2. By arranging the spring support block and the return spring, when drilling is required, just slowly press down the cylindrical slider to drive the drill bit of the drilling machine body to slowly drill down. After the drilling is completed, slowly remove the pressure, and the cylindrical slider can be lifted under the action of the return spring, thereby driving the deburring mechanism to operate.

[0016] 3. When it is necessary to position and drill the profile at the top through the set positioning mechanism, just rotate the double-headed worm, and the two single-headed studs can be controlled to move towards the middle at the same time, and then clamp the profile in the middle. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 FIG. 1 is a schematic diagram of the overall structure of a high-precision beryllium-aluminum alloy drilling device proposed by the present invention; Figure 2 FIG. 2 is a schematic diagram of the bottom perspective structure of a high-precision beryllium-aluminum alloy drilling device proposed by the present invention; Figure 3 FIG. 3 is a schematic diagram of the structure of the positioning mechanism in a high-precision beryllium-aluminum alloy drilling device proposed by the present invention; Figure 4 FIG. 4 is a schematic diagram of the three-dimensional structure of the rack push rod in a high-precision beryllium-aluminum alloy drilling device proposed by the present invention; Figure 5 FIG. 5 is a schematic diagram of the three-dimensional structure of the operating table in a high-precision beryllium-aluminum alloy drilling device proposed by the present invention; Figure 6 FIG. 6 is a schematic diagram of the half-section three-dimensional structure of a high-precision beryllium-aluminum alloy drilling device proposed by the present invention before drilling; Figure 7 FIG. 7 is a schematic diagram of the three-dimensional structure of the pressing handle in a high-precision beryllium-aluminum alloy drilling device proposed by the present invention; Figure 8 FIG. 8 is a partial cross-sectional view of a high-precision beryllium-aluminum alloy drilling device proposed by the present invention during drilling.

[0018] In the figure: 1. Operating table; 101. Installation notch; 2. Pull rope; 3. Pressing handle; 301. First shaft hole; 302. Limit convex rod; 303. Rope groove; 4. Limit block; 5. First shaft rod seat; 6. Main support slide rail; 7. Cylindrical slider; 8. Drilling machine body; 9. Return spring; 10. Positioning mechanism; 1001. Fixed track; 1002. Double-headed worm; 1003. U-shaped bearing frame; 1004. First worm gear disc; 1005. Rack push rod; 1006. Driven gear; 1007. Single-headed stud; 1008. Hexagonal block; 1009. Threaded hole; 1010. Anti-slip groove; 11. Striped hole; 12. Central circular hole; 13. Deburring mechanism; 131. Rotating shaft rod frame; 132. Second worm gear disc; 133. First small gear; 134. Transmission pipe; 135. Sandpaper ring; 136. Polishing motor; 14. Rocker; 15. Second shaft rod seat; 16. Second transmission rod; 17. Third shaft rod seat; 18. Rack top rod; 19. Rope winding roller; 20. Bearing seat; 21. Spring support block. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0020] In this embodiment, referring to Figure 1-8 , a high-precision beryllium-aluminum alloy drilling device includes an operating table 1. An installation slot 101 is opened near the rear side of the upper surface of the operating table 1, and a vertical main support slide rail 6 is welded and fixed in the installation slot 101; a cylindrical slider 7 is slidably connected in the chute of the main support slide rail 6; and a drilling machine body 8 extending above the center of the operating table 1 is fixed on one side of the cylindrical slider 7 away from the bottom of the slot. A central circular hole 12 is opened in the middle of the operating table 1 directly below the drilling machine body 8; and a deburring mechanism 13 is arranged on the lower surface of the operating table 1 near the central circular hole 12. The deburring mechanism 13 includes two symmetrically arranged rotating shaft rod frames 131 fixed on the lower surface of the operating table 1. A same worm wheel disk two 132 is rotatably connected between the two rotating shaft rod frames 131. An inclined transmission pipe 134 whose axis passes through the center of the central circular hole 12 is arranged on the circumferential outer wall of the worm wheel disk two 132. A fixed umbrella head and a small gear one 133 are respectively fixed at the upper and lower ends of the transmission pipe 134; a sandpaper ring 135 is fixed on the circumferential outer wall of the top end of the fixed umbrella head; a vertical rack top rod 18 is fixed on the lower surface of the cylindrical slider 7; and a shaft rod seat three 17 is fixed on the lower surface of the operating table 1 near the bottom end of the rack top rod 18. A transmission rod one is rotatably connected in the middle of the shaft rod seat three 17. A worm gear sleeve and a helical gear are respectively fixed at both ends of the transmission rod one. The helical gear meshes with the rack top rod 18. By arranging the deburring mechanism 13 rotatably connected below the central circular hole 12 and cooperating with the rack top rod 18 forming a linkage with the cylindrical slider 7, the sandpaper ring 135 can be quickly attached to the drilling position while withdrawing the drill bit upward, eliminating the need for repositioning in traditional deburring, and the grinding pressure can be adjusted as the cylindrical slider 7 is lifted, with simple operation and low failure rate.

[0021] Among them, a grinding motor 136 is fixed near the bottom end of the side surface of the worm wheel disk two 132, and a driving gear is fixed at the top end of the output shaft of the grinding motor 136. The driving gear meshes with the small gear one 133; a self-locking screw hole is opened at the top end of the transmission pipe 134, and an adjusting stud adapted to the self-locking screw hole is reserved at the bottom end of the fixed umbrella head; according to the overall rotation amplitude of the deburring mechanism 13, the extending length of the fixed umbrella head is adjusted, and then the drilling position is ground at the most suitable grinding angle.

[0022] In the present invention, the aperture of the central circular hole 12 is larger than the diameter of the sandpaper ring 135, and a fillet is formed at the edge of one end of the central circular hole 12; by setting like this, when grinding, the sandpaper ring 135 can be prevented from grinding the operating table 1.

[0023] Referring toFigure 2 and Figure 8 At the bottom of the main support slide rail 6, a fixed pulley bracket is fixed to the side close to the rack ejector rod 18. A grooved pulley is arranged on the fixed pulley bracket. The pulley groove of the grooved pulley is stuck on the circumferential outer wall of the rack ejector rod 18, and the grooved pulley is located on the side away from the helical gear. By arranging the grooved pulley, the rack ejector rod 18 can be closely attached to the helical gear during use, ensuring that the rack ejector rod 18 can accurately drive the deburring mechanism 13 to rotate a specific angle, and then generate an accurate grinding pressure.

[0024] Refer to Figure 1 and Figure 6 On the lower surface of the cylindrical slider 7, a return spring 9 is fixed. The bottom end of the return spring 9 is fixed with a spring support block 21. A vertical rope hole is reserved in the middle of the spring support block 21, and the circumferential outer wall of the spring support block 21 is fixed on the inner wall of the main support slide rail 6. By arranging the spring support block 21 and the return spring 9, when drilling is required, just slowly press down the cylindrical slider 7 to drive the drill bit of the drill body 8 to slowly drill down. After the drilling is completed, slowly remove the pressure, and the cylindrical slider 7 can be lifted under the action of the return spring 9, and then drive the deburring mechanism 13 to operate.

[0025] Refer to Figure 1-Figure 2 、 Figure 7 At the rear side of the operating table 1, close to the lower part of the main support slide rail 6, two horizontal bearing seats 20 are fixed. The same winding roller 19 is rotatably connected between the two bearing seats 20. The same pulling rope 2 is wound around the circumferential outer wall of the winding roller 19. A shaft seat one 5 is fixed to the side of the main support slide rail 6 close to the top. A horizontal shaft is fixed to the side of the shaft seat one 5 away from the main support slide rail 6. A pressing handle 3 with a ginkgo leaf-shaped structure is rotatably connected to the horizontal shaft. The pressing handle 3 includes a fan-shaped part and a handle part. The fan-shaped part of the pressing handle 3 is located above the winding roller 19. A rope groove 303 is formed on the arc surface of the fan-shaped part of the pressing handle 3. The two ends of the pulling rope 2 are respectively fixed to the lower surface of the cylindrical slider 7 and the top end of the rope groove 303. When it is necessary to pull down the cylindrical slider 7, just press down the end of the pressing handle 3 away from the fan-shaped part.

[0026] Refer to Figure 1-Figure 2 、 Figure 7 In the middle of the pressing handle 3, a shaft hole one 301 adapted to the horizontal shaft is formed. A limiting convex rod 302 is fixed to the end of the pressing handle 3 close to the handle part. A limiting block 4 is reserved above the limiting convex rod 302 on the side of the shaft seat one 5. By arranging the limiting block 4, the upper limit position of the pressing handle 3 can be limited.

[0027] Refer to Figure 2-Figure 4, the upper surface of the operating table 1 is in a rectangular structure, and two strip-shaped holes 11 that are parallel to each other and symmetrically distributed about the central circular hole 12 are opened near the middle of the operating table 1. The length direction of the strip-shaped holes 11 is the same as the width direction of the operating table 1; and positioning mechanisms 10 are arranged in both of the two strip-shaped holes 11; each positioning mechanism 10 includes a U-shaped bearing frame 1003 fixed in the middle below the strip-shaped hole 11 with an upward opening and in a U-shaped structure. A vertical short shaft is rotatably connected in the U-shaped bearing frame 1003, and a driven gear 1006 and a first worm wheel disc 1004 are respectively fixed at the upper and lower ends of the short shaft. Symmetrically fixed on both sides of the lower surface of the top plate of the operating table 1 near the strip-shaped holes 11 are fixed tracks 1001, and rack push rods 1005 that are symmetrically distributed about the center are respectively slidably connected in the two fixed tracks 1001; tooth surfaces meshing with the driven gears 1006 are reserved on the opposite sides of the two rack push rods 1005; and hexagonal blocks 1008 that are symmetrically distributed about the center are respectively fixed at the ends of the two rack push rods 1005 away from each other. The six rectangular side surfaces of the hexagonal blocks 1008 are perpendicular to the vertical plane, and threaded holes 1009 are opened in the middle of the rectangular side surfaces of the hexagonal blocks 1008 near the top end and the driven gears 1006. Single-headed studs 1007 are screwed into the two topmost threaded holes 1009; on the lower surface of the operating table 1, a same double-headed worm 1002 is arranged on the side surfaces near the two first worm wheel discs 1004, and the double-headed worm 1002 meshes with the two first worm wheel discs 1004 at the same time; anti-slip grooves 1010 adapted to the fixed tracks 1001 are opened on the opposite sides of the two rack push rods 1005; by arranging the positioning mechanism 10, when positioning and drilling the profile at the top, only by rotating the double-headed worm 1002, the two single-headed studs 1007 can be controlled to move towards the middle at the same time, and then the profile in the middle can be clamped.

[0028] Refer to Figure 2 , a second shaft seat 15 is fixed on the lower surface of the operating table 1 near the front, and a second transmission rod 16 is rotatably connected in the second shaft seat 15. A rocker 14 and a first driven bevel gear are respectively fixed at the two ends of the second transmission rod 16. A second driving bevel gear meshing with the first driven bevel gear is arranged at the end of the double-headed worm 1002; by only rotating the rocker 14, the two single-headed studs 1007 can be driven to form an opening and closing action.

[0029] Refer to Figure 3-Figure 4 , internal hexagonal holes are opened at the tops of the single-headed studs 1007; cooperating with the two obliquely inward threaded holes 1009, an obliquely downward clamping force can be formed during clamping, effectively preventing clamping from falling off.

[0030] Working principle: Before use, adjust the distance between the two single-headed studs 1007 in the positioning mechanism to be greater than the width of the profile to be drilled according to the width of the profile. After the two single-headed studs 1007 clamp the profile, just maintain a tightness that allows for slow advancement, and then drilling can be carried out. When drilling is required, simply slowly press down the cylindrical slider 7 to drive the drill bit of the drill body 8 to slowly drill down. After the drilling is completed, slowly remove the pressure, and the cylindrical slider 7 will be lifted under the action of the return spring 9. When the cylindrical slider 7 slowly rises, under the action of the rack ejector rod 18, the second worm wheel disc 132 is driven to slowly rotate upward, and then the transmission pipe 134 and the sandpaper ring 135 at its top will slowly contact the bottom hole opening of the just-drilled hole to perform deburring operations.

[0031] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, making equivalent substitutions or changes, should be covered by the protection scope of the present invention.

Claims

1. A high-precision beryllium-aluminum alloy drilling device, including an operating table (1). An installation notch (101) is opened near the rear side of the upper surface of the operating table (1), and a main support slide rail (6) is fixed in the installation notch (101); a cylindrical slider (7) is slidably connected in the chute of the main support slide rail (6); and one side of the cylindrical slider (7) away from the bottom of the chute is fixed with a drilling machine body (8) extending above the center of the operating table (1), characterized in that, A central circular hole (12) is formed in the middle of the operation table (1) directly below the drill rig body (8); and a deburring mechanism (13) is arranged on the lower surface of the operation table (1) near the central circular hole (12). The deburring mechanism (13) includes two symmetrically arranged rotating shaft rod frames (131) fixed on the lower surface of the operation table (1). A same worm gear disk two (132) is rotatably connected between the two rotating shaft rod frames (131). An inclined transmission pipe (134) whose axis passes through the center of the central circular hole (12) is arranged on the circumferential outer wall of the worm gear disk two (132). A fixed umbrella head and a first small gear (133) are respectively fixed at the upper and lower ends of the transmission pipe (134); a sandpaper ring (135) is fixed on the circumferential outer wall of the top end of the fixed umbrella head; a vertical rack push rod (18) is fixed on the lower surface of the cylindrical slider (7); and a third shaft rod seat (17) is fixed on the lower surface of the operation table (1) near the bottom end of the rack push rod (18). A first transmission rod is rotatably connected in the middle of the third shaft rod seat (17). A worm gear sleeve and a helical gear are respectively fixed at the two ends of the first transmission rod. The helical gear meshes with the rack push rod (18).

2. The high-precision beryllium-aluminum alloy drilling device according to claim 1, characterized in that, A grinding motor (136) is fixed near the bottom end on the side surface of the worm gear disk two (132). A driving gear is fixed at the top end of the output shaft of the grinding motor (136). The driving gear meshes with the first small gear (133); a self-locking screw hole is formed at the top end of the transmission pipe (134), and an adjusting stud adapted to the self-locking screw hole is reserved at the bottom end of the fixed umbrella head.

3. The high-precision beryllium-aluminum alloy drilling device according to claim 1, characterized in that, The diameter of the central circular hole (12) is larger than the diameter of the sandpaper ring (135), and a fillet is provided at the edge of one end of the central circular hole (12).

4. A high-precision beryllium-aluminum alloy drilling device according to claim 1, characterized in that, A fixed pulley frame is fixed on the bottom end of the main support slide rail (6) near the side surface of the rack push rod (18). A grooved fixed pulley is arranged on the fixed pulley frame. The groove of the grooved fixed pulley is stuck on the circumferential outer wall of the rack push rod (18), and the grooved fixed pulley is located on the side away from the helical gear.

5. A high-precision beryllium-aluminum alloy drilling device according to claim 1, characterized in that, A return spring (9) is fixed on the lower surface of the cylindrical slider (7). A spring support block (21) is fixed at the bottom end of the return spring (9). A vertical rope hole is reserved in the middle of the spring support block (21), and the circumferential outer wall of the spring support block (21) is fixed on the inner wall of the main support slide rail (6).

6. The high-precision beryllium-aluminum alloy drilling device according to claim 5, characterized in that, Two horizontal bearing seats (20) are fixedly arranged below the rear side of the operation table (1) near the main support slide rail (6), and the same winding rope roller (19) is rotatably connected between the two bearing seats (20). The same pulling rope (2) is wound around the circumferential outer wall of the winding rope roller (19). A first shaft seat (5) is fixedly arranged near the top of the side surface of the main support slide rail (6). A horizontal shaft is fixedly arranged on the side of the first shaft seat (5) away from the main support slide rail (6). A pressing handle (3) with a ginkgo leaf-shaped structure is rotatably connected to the horizontal shaft. The pressing handle (3) comprises a fan-shaped part and a handle part. The fan-shaped part of the pressing handle (3) is located above the winding rope roller (19). A rope groove (303) is formed in the arc surface of the fan-shaped part of the pressing handle (3). Two ends of the pulling rope (2) are respectively fixedly arranged on the lower surface of the cylindrical slider (7) and the top end of the rope groove (303).

7. The high-precision beryllium-aluminum alloy drilling device according to claim 6, wherein, A first shaft hole (301) adapted to the horizontal shaft is formed in the middle of the pressing handle (3). A limiting convex rod (302) is fixedly arranged at one end of the pressing handle (3) close to the handle part. A limiting block (4) is reserved above the side surface of the first shaft seat (5) and located above the limiting convex rod (302).

8. The high-precision beryllium aluminum alloy drilling device according to claim 1, wherein, The upper surface of the operation table (1) is in a rectangular structure, and two strip-shaped holes (11) that are parallel to each other and symmetrically distributed about the central circular hole (12) are provided near the middle of the operation table (1). The length direction of the strip-shaped holes (11) is the same as the width direction of the operation table (1); and a positioning mechanism (10) is provided in each of the two strip-shaped holes (11); each positioning mechanism (10) includes a U-shaped bearing frame (1003) fixed below the strip-shaped hole (11) with an upward opening in the middle and in a U-shaped structure. A vertical short shaft is rotatably connected in the U-shaped bearing frame (1003), and a driven gear (1006) and a first worm wheel disc (1004) are respectively fixed at the upper and lower ends of the short shaft. On the lower surface of the top plate of the operation table (1) near both sides of the strip-shaped hole (11), symmetrically fixed opposite each other are fixed tracks (1001), and rack push rods (1005) that are symmetrically distributed about the center are respectively slidably connected in the two fixed tracks (1001); on the opposite sides of the two rack push rods (1005), tooth surfaces that mesh with the driven gear (1006) are reserved; and at the ends of the two rack push rods (1005) away from each other, hexagon blocks (1008) that are symmetrically distributed about the center are respectively fixed. The six rectangular sides of the hexagon block (1008) are all perpendicular to the vertical plane, and threaded holes (1009) are respectively provided in the middle of the rectangular sides of the hexagon block (1008) near the top end and the driven gear (1006). Single-headed studs (1007) are respectively screwed into the two topmost threaded holes (1009); on the lower surface of the operation table (1) near the sides of the two first worm wheel discs (1004), the same double-headed worm (1002) is provided, and the double-headed worm (1002) meshes with the two first worm wheel discs (1004) at the same time; on the opposite sides of the two rack push rods (1005), anti-detachment grooves (1010) adapted to the fixed tracks (1001) are respectively provided.

9. The high-precision beryllium-aluminum alloy drilling device according to claim 8, characterized in that, Near the front surface on the lower surface of the operation table (1), a second shaft seat (15) is fixed, and a second transmission rod (16) is rotatably connected in the second shaft seat (15). A rocker (14) and a first driven bevel gear are respectively fixed at the two ends of the second transmission rod (16). At the end of the double-headed worm (1002), a second driving bevel gear that meshes with the first driven bevel gear is provided.

10. A high-precision beryllium-aluminum alloy drilling device according to claim 1, characterized in that, An internal hexagonal hole is provided at the top end of the single-headed stud (1007); cooperating with the two obliquely inward threaded holes (1009).

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