Drilling device for precision machining and manufacturing

Abstract

The invention discloses a drilling device for precision machining and manufacturing, and belongs to the field of precision machining and manufacturing. The drilling device comprises a drilling device body which comprises a base, a fixing frame is fixedly installed on the base, a rotating table is further fixedly installed on the base, and a drilling table is rotationally arranged on the rotating table; a quick-change assembly capable of replacing drill bit bodies of different sizes is arranged in the supporting arm body. According to the drilling device, through the arranged quick change assembly, when the drill bit main body needs to be replaced, the quick change assembly is started to work, the needed drill bit main body is replaced, then drilling treatment can be continuously conducted on materials, and it is not needed to disassemble the drill bit main body on the supporting arm main body, select the drill bit main body of the corresponding size and install the drill bit main body on the supporting arm main body for work; the drill bit bodies can be replaced only by directly switching the drill bit bodies of the corresponding sizes through the quick-change assembly, the drill bit body replacement mode is more convenient and faster, and the working efficiency of the drilling equipment body is improved.

Description

Technical Field

[0001] The invention relates to the field of precision mechanical processing and manufacturing, and more specifically, to a drilling device for precision mechanical processing and manufacturing. Background Art

[0002] Precision machining refers to the process of changing the size or performance of a workpiece through a mechanical device. Most of the parts processed by casting, forging and welding are blanks, which are rarely used directly on the machine and need further processing to meet the technical requirements of the parts. The rough blank of the mechanical workpiece needs to be cut and drilled according to the required size, shape and form.

[0003] Some drilling devices used in precision machining and manufacturing need to perform precision machining on different materials. However, different materials require holes of different diameters. When holes of different diameters need to be drilled, the drill bit needs to be replaced. Usually, the drill bit is fixed on the motor, which is inconvenient to quickly replace the drill bit, and is not conducive to drilling holes of different sizes according to needs, and has low applicability. Summary of the invention

[0004] In view of the problems existing in the prior art, the object of the present invention is to provide a drilling device for precision machining and manufacturing.

[0005] To solve the above problems, the present invention adopts the following technical solutions.

[0006] A drilling device for precision machining and manufacturing, including a drilling equipment body including a base, a fixed frame fixedly installed on the base, a rotating table fixedly installed on the base, a drilling table rotatably arranged on the rotating table, a drive for rotating the drilling table arranged inside the rotating table, multiple groups of positioning fixtures arranged on the drilling table, materials to be drilled can be placed in the positioning fixtures, a drilling assembly is arranged on the fixed frame, a support arm body is movably arranged on a side of the fixed frame close to the drilling table, the drilling assembly can move the support arm body up and down, a drill bit body for drilling is arranged on the support arm body, a drive assembly that works with the drill bit body is also arranged on the support arm body, and a quick-change assembly that can replace drill bit bodies of different sizes is arranged inside the support arm body.

[0007] Furthermore, the drilling assembly includes a forward and reverse motor fixedly installed on the top of the fixed frame, the output end of the forward and reverse motor is fixedly connected to a threaded rod, the threaded rod passes through the fixed frame and is rotatably connected to the base, a movable block is rotatably sleeved on the outer surface of the threaded rod, the movable block is fixedly connected to the support arm body on one side close to the rotating table, and the threaded rod and the movable block are threadedly transmitted.

[0008] Furthermore, the support arm body includes a main support arm fixedly connected to the movable block, the main support arm is rotatably connected to the rotating arm, the rotating arm is fixedly connected to the driving arm, and the support arm body is composed of the main support arm, the rotating arm and the driving arm.

[0009] Furthermore, a sliding cavity is provided inside the main support arm, and the driving assembly includes a first driving motor slidably arranged in the sliding cavity, a first gear is fixedly sleeved on the outer surface of the output end of the first driving motor, and the output end of the first driving motor passes through the bottom of the sliding cavity, and a circular cavity is provided inside the rotating arm, a fixing block is fixedly installed in the circular cavity, a drill body is rotatably installed on the fixing block, and a second gear is fixedly sleeved on the outer surface of the drill body, and the first gear and the second gear are meshed with each other.

[0010] Furthermore, a transmission cavity is opened inside the driving arm, and the quick-change assembly includes a slide rail fixedly mounted on the top wall of the slide cavity, a slider is slidably arranged on the slide rail, a first driving motor is fixedly mounted on the bottom of the slider, an electric telescopic rod is fixedly mounted on the inner wall of the slide cavity, the telescopic end of the electric telescopic rod is fixedly connected to the side wall of the first driving motor, a second driving motor is fixedly mounted on the top of the driving arm, an output end of the second driving motor passes through the driving arm to the transmission cavity, and the output end of the second driving motor is fixedly connected to a worm, the worm is rotatably arranged in the transmission cavity, a worm wheel is also rotatably arranged in the transmission cavity, a rotating rod is provided inside the worm wheel, one end of the rotating rod is fixedly connected to the inner wall of the transmission cavity, and the other end of the rotating rod is rotatably connected to the main support arm, and the rotating rod passes through the fixed block.

[0011] Furthermore, the lowest point of the horizontal position of the thread of the threaded rod is higher than the horizontal position of the drilling platform, a fan is arranged on the threaded rod, a fan is arranged inside the fan, air is inhaled through a hose at the bottom of the fan, and the blowing direction of the fan is toward the drilling platform.

[0012] Furthermore, the side surfaces of the fixing block are provided with second gears and drill bit bodies, and the second gears and drill bit bodies are provided in multiple groups, and the size of each drill bit body is different.

[0013] Furthermore, the surface of the base for fixing the rotating table is inclined, and the material can slide into the material receiving box through the surface of the base. A material receiving box is fixedly installed on one side of the base, and a discharge block for receiving debris is slidably arranged below the positioning fixture. The outer end of the top of the discharge block is inclined, and the debris can slide into the material receiving box along the surface of the discharge block.

[0014] Furthermore, an ejection assembly is provided inside the positioning jig, and the ejection assembly is used in conjunction with a discharge block. The ejection assembly includes an obstructing plate fixedly mounted on the inner wall of the positioning jig, and three top holes are opened on the circumference of the obstructing plate. A drill hole is opened at the center of the obstructing plate, and the drill hole is used in conjunction with a drill bit body. The top of the discharge block is fixedly connected to a push rod group, and the push rod group can push the finished product on the obstructing plate out of the positioning jig. A connecting rod is fixedly installed on the outer wall of the rotating table, and the connecting rod is fixedly connected to a push block. The top of the push block is tilted, and the bottom of the discharge block is tilted, and the discharge block is used in conjunction with a push block.

[0015] Furthermore, the push rod group consists of three push rods, and the push rod at the outermost edge is the shortest.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The quick-change component provided in the present invention can start the quick-change component when the drill bit body needs to be replaced, and the required drill bit body can be replaced to continue drilling the material. There is no need to remove the drill bit body on the support arm body, select a drill bit body of corresponding size and install it on the support arm body to work. The drill bit body can be replaced by directly switching the drill bit body of corresponding size through the quick-change component. The method of replacing the drill bit body is more convenient and quick, and the working efficiency of the drilling equipment body is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the present invention;

[0019] Figure 2 is a side sectional view of the support arm body of the present invention;

[0020] Figure 3 A side cross-sectional view of the support arm body of the present invention when replacing a drill bit;

[0021] Figure 4 A top view of the drilling platform of the present invention;

[0022] Figure 5 It is a schematic diagram of the drilling platform when the drill bit body of the present invention is working;

[0023] Figure 6 It is a schematic diagram of the drilling platform switching positioning fixture of the present invention;

[0024] Figure 7 An exploded view of the internal structure of the rotary table and the drilling table of the present invention;

[0025] Figure 8 For the present invention Figure 7 Enlarged view of point A in .

[0026] Description of the numbers in the figure:

[0027] 1. Drilling equipment body; 11. Base; 12. Fixed frame; 13. Rotating table; 14. Drilling table; 15. Positioning fixture; 16. Material receiving box; 2. Drilling assembly; 21. Forward and reverse motor; 22. Threaded rod; 23. Movable block; 3. Support arm body; 31. Main support arm; 32. Rotating arm; 33. Driving arm; 34. Sliding cavity; 35. Circular cavity; 36. Transmission cavity; 4. Driving assembly; 41. First driving motor ; 42. first gear; 43. fixed block; 44. second gear; 5. drill body; 6. quick-change assembly; 61. slide rail; 62. electric telescopic rod; 63. slider; 64. second drive motor; 65. worm; 66. rotating rod; 67. worm gear; 7. fan; 8. discharge block; 9. ejector assembly; 91. connecting rod; 92. push block; 93. push rod group; 94. blocking plate; 95. top hole; 96. drilling. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention; it is obvious that the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making creative work are within the scope of protection of the present invention.

[0029] See also Figures 1 to 8 A drilling device for precision machining and manufacturing includes a drilling equipment body 1 including a base 11, a fixed frame 12 is fixedly installed on the base 11, a rotating table 13 is also fixedly installed on the base 11, a drilling table 14 is rotatably arranged on the rotating table 13, a drive for rotating the drilling table 14 is arranged inside the rotating table 13, and multiple groups of positioning fixtures 15 are arranged on the drilling table 14, and materials to be drilled 96 can be placed in the positioning fixtures 15, a drilling assembly 2 is arranged on the fixed frame 12, and a support arm body 3 is movably arranged on one side of the fixed frame 12 close to the drilling table 14, the drilling assembly 2 can make the support arm body 3 move up and down, a drill bit body 5 for drilling 96 is arranged on the support arm body 3, and a driving assembly 4 that works with the drill bit body 5 is also arranged on the support arm body 3, and a quick-change assembly 6 for replacing drill bit bodies 5 of different sizes is arranged inside the support arm body 3.

[0030] When the drilling equipment body 1 is working, first the rotating table 13 is operated to rotate the drilling table 14 to the bottom of the drill bit body 5, and the material to be drilled 96 is placed in the positioning fixture 15, and then the drilling assembly 2 is started to work, and the drilling assembly 2 moves downward with the entire support arm body 3 and the drill bit body 5. When the drill bit body 5 on the support arm body 3 begins to contact the material in the positioning fixture 15, the driving assembly 4 starts to work and starts to rotate with the drill bit body 5, and the drill bit body 5 drills the material in the positioning fixture 15 96. When the size of the hole to be drilled in the material needs to be changed, there is no need to disassemble the drill bit body 5 for replacement. The operation only requires installing the drill body 5 of different sizes to be used in the quick-change assembly 6 before the drilling 96 work starts. When the drill body 5 needs to be replaced, the quick-change assembly 6 is started to work, and the required drill body 5 is replaced, and the material can continue to be drilled 96. There is no need to remove the drill body 5 on the support arm body 3, select the drill body 5 of the corresponding size and install it on the support arm body 3 to work. It is only necessary to directly switch the drill body 5 of the corresponding size through the quick-change assembly 6 to complete the replacement of the drill body 5. The way of replacing the drill body 5 is more convenient and quick, which improves the working efficiency of the drilling equipment body 1.

[0031] The support arm body 3 includes a main support arm 31 fixedly connected to the movable block 23 , the main support arm 31 is rotatably connected to a rotating arm 32 , the rotating arm 32 is fixedly connected to a driving arm 33 , and the support arm body 3 is composed of the main support arm 31 , the rotating arm 32 and the driving arm 33 .

[0032] A sliding cavity 34 is provided inside the main support arm 31, and the driving assembly 4 includes a first driving motor 41 slidably arranged in the sliding cavity 34. A first gear 42 is fixedly sleeved on the outer surface of the output end of the first driving motor 41, and the output end of the first driving motor 41 passes through the bottom of the sliding cavity 34. A circular cavity 35 is provided inside the rotating arm 32, and a fixing block 43 is fixedly installed in the circular cavity 35. A drill body 5 is rotatably installed on the fixing block 43. A second gear 44 is fixedly sleeved on the outer surface of the drill body 5, and the first gear 42 and the second gear 44 are meshed with each other.

[0033] A transmission chamber 36 is provided inside the driving arm 33, and the quick-change assembly 6 includes a slide rail 61 fixedly mounted on the top wall of the slide chamber 34, a slider 63 is slidably arranged on the slide rail 61, a first driving motor 41 is fixedly mounted on the bottom of the slider 63, an electric telescopic rod 62 is fixedly mounted on the inner wall of the slide chamber 34, the telescopic end of the electric telescopic rod 62 is fixedly connected to the side wall of the first driving motor 41, a second driving motor 64 is fixedly mounted on the top of the driving arm 33, an output end of the second driving motor 64 passes through the driving arm 33 to the transmission chamber 36, and the output end of the second driving motor 64 is fixedly connected to a worm 65, which is rotatably arranged in the transmission chamber 36, a worm gear 67 is also rotatably arranged in the transmission chamber 36, a rotating rod 66 is fixedly sleeved inside the worm gear 67, one end of the rotating rod 66 is fixedly connected to the inner wall of the transmission chamber 36, and the other end of the rotating rod 66 is rotatably connected to the main support arm 31, and the rotating rod 66 passes through the fixed block 43.

[0034] Second gears 44 and drill bodies 5 are disposed on the sides of the fixed block 43 . There are multiple sets of the second gears 44 and drill bodies 5 , and the sizes of each drill body 5 are different.

[0035] The drilling assembly 2 includes a forward and reverse motor 21 fixedly installed on the top of the fixed frame 12, the output end of the forward and reverse motor 21 is fixedly connected to a threaded rod 22, the threaded rod 22 passes through the fixed frame 12 and is rotatably connected to the base 11, and a movable block 23 is rotatably sleeved on the outer surface of the threaded rod 22. The side of the movable block 23 close to the rotating table 13 is fixedly connected to the support arm body 3, and the threaded rod 22 and the movable block 23 are threadedly transmitted.

[0036] When drilling 96 is working, first start the forward and reverse motor 21, and the forward and reverse motor 21 works to rotate the threaded rod 22. As the threaded rod 22 rotates, the movable block 23 will move downward along the direction of the threaded rod 22 due to the limiting effect of the support arm and the fixed frame 12. During the downward movement of the movable block 23, the support arm and the driving component 4 on the support arm and the drill body 5 will move downward together. When the drill body 5 begins to contact the material to be drilled 96, the driving component 4 starts to work at this time, and the first driving motor 41 starts to work. The first driving motor 41 will rotate the first gear 42, and at the same time, the first gear 42 will rotate the second gear 44 meshing with the first gear 42. When the second gear 44 rotates, it will rotate the drill body 5, thereby realizing the action of rotating the drill body 5 to drill the material 96;

[0037] When the diameter of the material to be drilled 96 changes, the size of the drill bit needs to be changed. First, the first drive motor 41 is turned off, and then the electric telescopic rod 62 is started to work, so that the electric telescopic rod 62 is retracted. Since the slider 63 can move on the slide rail 61, the electric telescopic rod 62 will bring the first drive motor 41 to Figure 2As shown in the figure, the first drive motor 41 moves to the left with the first gear 42 (it should be noted that a slide groove is provided at the bottom of the slide cavity 34 for the output end of the first drive motor 41 to move). At this time, the first gear 42 is separated from the second gear 44, and the second drive motor 64 is started. The second drive motor 64 drives the worm 65 to rotate, and the worm 65 drives the worm wheel 67 to rotate at the same time. The worm wheel 67 drives the rotating rod 66 to rotate. When the rotating rod 66 rotates, the entire rotating arm 32 and the driving arm 33 are rotated. When the rotating arm 32 rotates, the drill bodies 5 of different sizes on the rotating arm 32 will also rotate to the position where the drill bodies 5 face downward. When the drill body 5 to be used is rotated to the position where the drill body 5 faces downward, the second drive motor 64 is stopped and the electric telescopic rod 62 is started. The electric telescopic rod 62 extends to push the first drive motor 41 to slide in the sliding cavity 34 until the first drive motor 41 engages with the second gear 44 again with the first gear 42. Then the electric telescopic rod 62 is closed to complete the replacement of the drill body 5.

[0038] like Figure 1 As shown, the lowest point of the horizontal position of the thread of the threaded rod 22 is higher than the horizontal position of the drilling platform 14 , a fan 7 is arranged on the threaded rod 22 , a fan is arranged inside the fan 7 , air is inhaled through a hose at the bottom of the fan 7 , and the blowing direction of the fan 7 is toward the drilling platform 14 .

[0039] The fan 7 is provided not only to cool the drill body 5 during the drilling operation, but also to blow away the debris generated during the drilling operation, thereby reducing excessive debris in the positioning fixture 15, surface vibration of the bottom of the material during the drilling operation, material instability, and differences in the size of the drilled hole 96.

[0040] like Figure 1 , Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8 As shown, the surface of the base 11 for fixing the rotating table 13 is inclined, and the material can slide into the receiving box 16 through the surface of the base 11. The receiving box 16 is fixedly installed on one side of the base 11, and a discharge block 8 for receiving debris is slidably arranged below the positioning fixture 15. The outer end of the top of the discharge block 8 is inclined, and the debris can slide along the surface of the discharge block 8 into the receiving box 16.

[0041] After the material of the hole 96 drilled in the positioning fixture 15 generates debris, it will fall to the top of the discharge block 8, and fall onto the base 11 along the inclined top of the discharge block 8, thereby being guided by the inclined base 11 and, in conjunction with the effect of the fan 7, blowing the debris into the receiving box 16 to ensure the cleanliness of the base 11.

[0042] like Figure 1 , Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8 As shown, the interior of the positioning fixture 15 is provided with an ejection assembly 9, which is used in conjunction with the discharge block 8. The ejection assembly 9 includes a blocking plate 94 fixedly mounted on the inner wall of the positioning fixture 15, and three top holes 95 are opened on the circumference of the blocking plate 94. A drill hole 96 is opened at the center of the blocking plate 94, and the drill hole 96 is used in conjunction with the drill bit body 5. The top of the discharge block 8 is fixedly connected to a push rod group 93, and the push rod group 93 can push the finished product on the blocking plate 94 out of the positioning fixture 15. A connecting rod 91 is fixedly mounted on the outer wall of the rotating table 13, and the connecting rod 91 is fixedly connected to a push block 92. The top of the push block 92 is tilted, and the bottom of the discharge block 8 is tilted, and the discharge block 8 is used in conjunction with the push block 92.

[0043] When the material in the positioning fixture 15 has completed the drilling 96, the drilling platform 14 is rotated to move the next positioning fixture 15 to the bottom of the drill bit body 5. During this process, the drilling platform 14 will Figure 5 As shown in the figure, it rotates clockwise. Since the top of the push block 92 is tilted and the bottom of the discharge block 8 is tilted, the push block 92 will move upward against the discharge block 8. When the discharge block 8 moves upward, it will also move the push rod group 93 upward. The push rod group 93 passes through the three top holes 95 on the blocking plate 94 to push out the material with the drilled hole 96 in the positioning fixture 15. The material falls on the base 11 and slides into the material receiving box 16, realizing the automatic unloading action.

[0044] like Figures 5 to 8 As shown, the push rod group 93 is composed of three push rod groups 93, and the push rod at the outermost edge is the shortest.

[0045] Since the top of the outer surface of the discharge block 8 is tilted and the outermost edge of the three push rods is the shortest, the material pushed up by the push rod group 93 is in an inclined state under the action of the push rod group 93, and will slide out of the positioning fixture 15 while exceeding the positioning fixture 15, facilitating automatic unloading.

[0046] Instructions for use: When the drilling equipment body 1 is working, first the rotary table 13 is operated to rotate the drill table 14 to the position directly below the drill bit body 5, and the material to be drilled 96 is placed in the positioning fixture 15, and then the drilling assembly 2 is started to work, and the drilling assembly 2 moves downward with the entire support arm body 3 and the drill bit body 5. When the drill bit body 5 on the support arm body 3 begins to contact the material in the positioning fixture 15, the driving assembly 4 starts to work and starts to rotate with the drill bit body 5, and the drill bit body 5 drills the material in the positioning fixture 15 96. When the size of the hole to be drilled in the material needs to be changed, it is not necessary to disassemble the drill bit body 5. To carry out the replacement operation, it is only necessary to install the drill body 5 of different sizes to be used in the quick-change assembly 6 before starting the drilling 96 work. When replacing the drill body 5, start the quick-change assembly 6 to work, replace the required drill body 5, and then continue to drill the material 96. There is no need to remove the drill body 5 on the support arm body 3, select the drill body 5 of the corresponding size and install it on the support arm body 3 to work. It is only necessary to directly switch the drill body 5 of the corresponding size through the quick-change assembly 6 to complete the replacement of the drill body 5. The way of replacing the drill body 5 is more convenient and quick, which improves the working efficiency of the drilling equipment body 1.

[0047] The above is only a preferred specific implementation of the present invention; however, the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solution and its improved conception within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A drilling device (96) for precision machining, the drilling device body (1) comprising a base (11), characterized in that: A fixed frame (12) is fixedly mounted on the base (11), a rotating platform (13) is also fixedly mounted on the base (11), a drilling platform (14) is rotatably mounted on the rotating platform (13), a drive for rotating the drilling platform (14) is disposed inside the rotating platform (13), a plurality of positioning jigs (15) are disposed on the drilling platform (14), materials to be drilled (96) can be placed in the positioning jigs (15), and a drilling assembly (2) is disposed on the fixed frame (12). A support arm body (3) is movably provided on one side of the fixed frame (12) close to the drilling platform (14); the drilling assembly (2) can move the support arm body (3) up and down; a drill head body (5) for drilling holes (96) is provided on the support arm body (3); a driving assembly (4) for driving the drill head body (5) is also provided on the support arm body (3); and a quick-change assembly (6) for replacing drill heads (5) of different sizes is provided inside the support arm body (3).

2. A drilling device (96) for precision machining according to claim 1, characterized in that: The drilling assembly (2) comprises a forward and reverse motor (21) fixedly mounted on the top of a fixed frame (12); the output end of the forward and reverse motor (21) is fixedly connected to a threaded rod (22); the threaded rod (22) penetrates the fixed frame (12) and is rotatably connected to the base (11); a movable block (23) is rotatably sleeved on the outer surface of the threaded rod (22); a side of the movable block (23) close to the rotating platform (13) is fixedly connected to the support arm body (3); and the threaded rod (22) and the movable block (23) are threadedly driven.

3. A drilling device (96) for precision machining according to claim 2, characterized in that: The support arm body (3) comprises a main support arm (31) fixedly connected to the movable block (23); the main support arm (31) is rotatably connected to a rotating arm (32); the rotating arm (32) is fixedly connected to a driving arm (33); the support arm body (3) is composed of the main support arm (31), the rotating arm (32) and the driving arm (33).

4. A drilling device (96) for precision machining according to claim 3, characterized in that: A sliding cavity (34) is provided inside the main support arm (31), and the driving assembly (4) comprises a first driving motor (41) slidably arranged in the sliding cavity (34); a first gear (42) is fixedly sleeved on the outer surface of the output end of the first driving motor (41); the output end of the first driving motor (41) passes through the bottom of the sliding cavity (34); a circular cavity (35) is provided inside the rotating arm (32), a fixing block (43) is fixedly installed in the circular cavity (35), a drill body (5) is rotatably installed on the fixing block (43), a second gear (44) is fixedly sleeved on the outer surface of the drill body (5), and the first gear (42) and the second gear (44) are meshed with each other.

5. A drilling device (96) for precision machining according to claim 4, characterized in that: A transmission cavity (36) is provided inside the driving arm (33); the quick-change assembly (6) comprises a slide rail (61) fixedly mounted on the top wall of the slide cavity (34); a slider (63) is slidably arranged on the slide rail (61); a first driving motor (41) is fixedly mounted on the bottom of the slider (63); an electric telescopic rod (62) is fixedly mounted on the inner wall of the slide cavity (34); a telescopic end of the electric telescopic rod (62) is fixedly connected to a side wall of the first driving motor (41); a second driving motor (64) is fixedly mounted on the top of the driving arm (33); and the second driving motor (64) is fixedly mounted on the top of the driving arm (33). The output end of the second drive motor (64) passes through the driving arm (33) to the transmission cavity (36); the output end of the second drive motor (64) is fixedly connected to a worm (65); the worm (65) is rotatably arranged in the transmission cavity (36); a worm wheel (67) is also rotatably arranged in the transmission cavity (36); a rotating rod (66) is fixedly sleeved inside the worm wheel (67); one end of the rotating rod (66) is fixedly connected to the inner wall of the transmission cavity (36); the other end of the rotating rod (66) is rotatably connected to the main support arm (31); and the rotating rod (66) passes through the fixed block (43).

6. A drilling device (96) for precision machining according to claim 5, characterized in that: The lowest point of the horizontal position of the thread of the threaded rod (22) is higher than the horizontal position height of the drilling platform (14); a fan (7) is arranged on the threaded rod (22); a fan is arranged inside the fan (7); air is inhaled through a hose at the bottom of the fan (7); and the blowing direction of the fan (7) is toward the drilling platform (14).

7. A drilling device (96) for precision machining according to claim 6, characterized in that: The fixed block (43) is provided with a second gear (44) and a drill body (5) on its circumferential side surface. The second gear (44) and the drill body (5) are provided in multiple groups, and the size of each drill body (5) is different.

8. A drilling device (96) for precision machining according to claim 7, characterized in that: The surface of the base (11) for fixing the rotating table (13) is arranged to be inclined, and the material can slide down into the material receiving box (16) through the surface of the base (11); a material receiving box (16) is fixedly installed on one side of the base (11); a discharge block (8) for receiving debris is slidably arranged below the positioning fixture (15); the outer end of the top of the discharge block (8) is arranged to be inclined, and the debris can slide down into the material receiving box (16) along the surface of the discharge block (8).

9. A drilling device (96) for precision machining according to claim 8, characterized in that: An ejection assembly (9) is arranged inside the positioning fixture (15), and the ejection assembly (9) is used in conjunction with a discharge block (8). The ejection assembly (9) comprises a blocking plate (94) fixedly mounted on the inner wall of the positioning fixture (15), and three top holes (95) are arranged on the circumference of the blocking plate (94). A drill hole (96) is arranged at the center of the blocking plate (94), and the drill hole (96) is used in conjunction with a drill bit body (5). The top of the discharge block (8) is fixedly connected to a push rod group (93), and the push rod group (93) can push the finished product on the blocking plate (94) out of the positioning fixture (15). A connecting rod (91) is fixedly mounted on the outer wall of the rotating table (13), and the connecting rod (91) is fixedly connected to a push block (92). The top of the push block (92) is inclined, and the bottom of the discharge block (8) is inclined. The discharge block (8) is used in conjunction with the push block (92).

10. A drilling device (96) for precision machining according to claim 9, characterized in that: The push rod group (93) is composed of three push rods (93), and the push rod at the outermost edge is the shortest.

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