A shaft positioning device for a ship boring device used in shipyard production and a method of using the same

Abstract

The present invention discloses a shaft positioning device for a ship boring device used in shipyard production in the technical field of ship boring devices, comprising a mounting seat and a shaft, wherein the outer wall of the screw rod located in the inner cavity of the sleeve is sleeved with a U-shaped push block, and a partition plate can be added between the two groups of flanges to increase the distance between the two groups of connecting rings, so that the distance between the front and rear groups of fixed plug blocks changes, so as to adapt to fixing shafts of different lengths, a motor drives the gear, an outer gear ring and an annular connecting block to rotate, and the annular connecting block drives the gear ring, a driven gear and the screw rod to rotate, and the screw rod rotates to make the U-shaped push block push the clamping block to move under the restriction of a limit rod, and the three groups of clamping blocks approach each other to insert the fixed plug block into the jack, so as to fix shafts of different diameters, rotating the screw rod can change the horizontal position of the sleeve, rotating the lifting screw rod can change the vertical position of the sleeve, and the position and angle of the center line of the shaft body can be changed by rotating the screw rod and the lifting screw rod, so as to meet the needs of various processing points of the boring hole.

Description

Technical Field

[0001] The invention relates to the technical field of ship boring devices, and in particular to an axis positioning device of a ship boring device for production in a shipyard and a use method thereof. Background Art

[0002] Boring holes for ship shafts and rudder systems is one of the key processes in shipbuilding. When boring holes for ship shafts and rudder systems, the positions and angles of various processing points are different. The existing device simply fixes the shaft body and cannot adjust the position of the shaft centerline to adapt to different processing points. The existing fixing device cannot be adjusted according to the specifications of the shaft body, which limits the scope of use of the device. Therefore, we propose a shaft positioning device for a ship boring device for shipyard production and a method for using the device. Summary of the invention

[0003] The object of the present invention is to provide a shaft positioning device for a ship boring device used in shipyard production and a method for using the same, so as to solve the problems raised in the above-mentioned background technology.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical scheme: a shaft positioning device for a ship boring device for shipyard production, comprising a mounting seat and a shaft body, wherein side plates are provided on the left and right sides of the top outer wall of the mounting seat, top plates are provided on the tops of the two groups of side plates, a mounting groove is provided in the middle of the top outer wall of the top plate, a movable seat is slidably connected in the mounting groove, four corners of the top outer wall of the movable seat are provided with through holes that pass through up and down, and a lifting rod is movably inserted in the through hole, a lifting plate is sleeved on the top of the four groups of lifting rods, a fixing nut is sleeved on the top thread at the connection between the lifting rod ring outer wall and the lifting plate, a screw hole is provided in the center of the top outer wall of the lifting plate, a lifting screw rod is provided in the screw hole, the bottom of the lifting screw rod is connected to the top outer wall of the movable seat through a bearing, a sleeve is provided on the bottom of the four groups of lifting rods extending to the bottom outer wall of the top plate, the shaft body is located in the inner cavity of the sleeve, and a front and rear groups of motors are provided on the top outer wall of the sleeve, the output ends of the two groups of motors on the opposite sides are provided with gears, and the front of the sleeve ring outer wall An annular groove is provided on both sides of the rear part, and an annular connecting block is slidably connected in the annular groove, and the annular connecting block is provided with an external gear ring fixedly sleeved on the annular outer wall, and a gear ring is provided on the outer wall of the two groups of annular connecting blocks on the opposite side, and three groups of mounting holes are provided in an annular array on both sides of the front and rear where the annular outer wall of the sleeve is connected with the two groups of annular connecting blocks, and a screw rod is provided in the mounting hole through a bearing, and the three groups of screw rods on the same side of the upper and lower sides are provided with driven gears on the opposite ends, and the two groups of driven gears on the same side of the upper and lower sides are connected with the two groups of gears on the opposite ends. The outer walls of the opposite sides of the circles are meshed, and the outer wall of the screw rod located in the inner cavity of the sleeve is sleeved with a U-shaped push block, and the two output ends of the U-shaped push block are located on the opposite sides of the three groups of U-shaped push blocks on the same side above and below, and the two output ends of the U-shaped push block are fixedly connected with clamping blocks, and both sides of the connection between the screw rod and the sleeve are movably connected with limit rods, one end of the limit rod extends to the outside of the sleeve, and the other end of the limit rod is fixedly connected to the clamping block, and the two protruding ends of the U-shaped push block are located between the limit rod and the screw rod.

[0005] Furthermore, the annular outer wall of the shaft body uses a sliding groove that cooperates with the clamping block, and two groups of front and rear auxiliary centering blocks are slidably connected in the sliding groove. The outer walls of the three groups of auxiliary centering blocks on the same side are connected to an adjusting screw through a bearing. The other end of the adjusting screw extends to the outer wall of the sleeve and is provided with a handle, and the adjusting screw is located on the outside of the two groups of driven gears on the same side, and a benchmark rod is movably inserted into the annular outer wall of the sleeve. The three groups of benchmark rods on the same side are fixedly connected to the auxiliary centering block at one end.

[0006] Furthermore, the sleeve is composed of two groups of connecting rings and flanges, the two groups of connecting rings are connected by flanges at opposite ends, the movable seat includes a main board connected to the bottom of the lifting screw rod through a bearing, the front and rear outer walls of the main board are fixed with plug rods, the outer walls of the two groups of plug rods on the left and right sides are sleeved with movable plates, the two groups of lifting rods on the left and right sides are arranged on the left and right sides of the outer wall of the top of the movable plate, and the plug rod is located between the two groups of lifting rods on the left and right sides, the front and rear inner walls of the mounting groove are provided with grooves matching the movable plate, and the top outer wall of the movable plate is provided with tightening screws matching the plug rods.

[0007] Furthermore, the bottom outer wall of the sleeve is provided with two sets of front and rear slides, the bottom of the slide extends to the bottom outer wall of the mounting seat, and the mounting seat is provided with a slot matching the slide, and the left outer wall of the sleeve is provided with a screw through a bearing, and the left end of the screw extends to the left outer wall of the side panel.

[0008] Furthermore, the three groups of clamping blocks on the same upper and lower sides are provided with fixed plug blocks at opposite ends, and the inner wall of the slide groove is provided with a plug hole that matches the fixed plug block.

[0009] Furthermore, the clamping block and the auxiliary centering block are arc-shaped blocks with the same shape and size.

[0010] Furthermore, a shaft positioning device for a ship boring device for shipyard production and a method for using the same are provided, and the method for using the same comprises the following steps:

[0011] S1: When in use, the screw rod is rotated and adjusted according to the scale line on the outer wall of the benchmark according to the specifications of the shaft body to change the distance between the three sets of auxiliary centering blocks. A partition plate can also be installed between the two sets of flanges to increase the distance between the two sets of connecting rings, so that the distance between the front and rear sets of fixed plugs changes to adapt to the fixation of shafts of different lengths. The slide groove on the outer wall of the shaft body is aligned and inserted with the auxiliary centering block to adapt to the centering and fixation of shafts with different diameters.

[0012] S2: After the shaft body is inserted, the motor is started, and the motor drives the gear, the outer gear ring and the annular connecting block to rotate. The annular connecting block drives the gear ring, the driven gear and the screw to rotate. The screw rotates so that the U-shaped push block pushes the clamping block to move under the restriction of the limit rod, and the clamping block is stuck in the slide groove, and the fixed plug block enters the socket. At this time, the shaft body is fixed in the inner cavity of the sleeve;

[0013] S3: After the shaft is fixed, the position of the sleeve is changed by rotating the lifting screw and the screw, the position of the center line of the shaft is changed, and holes are punched at different angles on the front end surface of the shaft.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. A partition can be installed between the two sets of flanges to increase the distance between the two sets of connecting rings, so that the distance between the front and rear sets of fixed plugs can be changed, which is suitable for fixing shafts of different lengths. When the distance between the front and rear sets of connecting rings changes, the movable plate moves into the grooves on the front and rear sides. After the adjustment is completed, the adjustment knob is tightened to fix the movable plate on the plug rod, which is suitable for fixing shafts of different lengths. The motor drives the gear, the outer gear ring and the annular connecting block to rotate, and the annular connecting block drives the gear ring, the driven gear and the screw to rotate. The rotation of the screw causes the U-shaped push block to push the clamp block to move under the restriction of the limit rod. The three sets of clamp blocks are close to each other to insert the fixed plug block into the jack, which can fix shafts of different diameters.

[0016] 2. Rotating the screw can change the horizontal position of the sleeve, and rotating the lifting screw can change the vertical position of the sleeve. The position and angle of the center line of the shaft can be changed by rotating the screw and lifting screw, so as to meet the needs of various processing points of the boring hole;

[0017] 3. When installing the shaft, you can rotate the adjustment screw according to the specifications of the shaft and the scale line on the outer wall of the benchmark to change the distance between the three sets of auxiliary centering blocks, and then align the slide groove on the outer wall of the shaft with the auxiliary centering block and insert it to facilitate the alignment of the fixed plug block and the socket, which can adapt to the centering and fixation of shafts with different diameters. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0019] Figure 2 A top view of the top plate of the present invention;

[0020] Figure 3 It is a schematic diagram of the connection between the sleeve and the annular connecting block of the present invention;

[0021] Figure 4 It is a schematic diagram of the connection between the sleeve and the screw rod of the present invention.

[0022] In the figure: 1. mounting seat; 2. side plate; 3. top plate; 4. mounting groove; 5. movable seat; 51. main board; 52. plug rod; 53. movable plate; 6. lifting rod; 7. lifting plate; 8. lifting screw; 9. sleeve; 10. shaft; 11. motor; 12. gear; 13. annular connecting block; 14. outer gear ring; 15. gear ring; 16. screw; 17. driven gear; 18. clamping block; 19. limiting rod; 20. U-shaped push block; 21. fixed plug block; 22. slide groove; 23. socket; 24. adjusting screw; 25. auxiliary centering block; 26. benchmark; 27. slide plate; 28. screw. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] The present invention provides a technical solution: a shaft positioning device for a ship boring device used in shipyard production, please refer to Figure 1-4 , including a mounting seat 1 and a shaft body 10, side panels 2 are provided on both sides of the top outer wall of the mounting seat 1, top panels 3 are provided on the top of the two sets of side panels 2, a mounting groove 4 is provided in the middle of the top outer wall of the top panel 3, a movable seat 5 is slidably connected in the mounting groove 4, through holes are provided at the four corners of the top outer wall of the movable seat 5, and lifting rods 6 are movably inserted in the through holes, and lifting plates 7 are sleeved on the top of the four sets of lifting rods 6, and a fixing nut is sleeved on the top thread of the connection between the lifting rod 6 and the lifting plate 7. The top outer wall of the lifting plate 7 is provided with a lifting screw The grooves matched with the lowering rod 6 are provided, and the lifting rod 6 can slide in its inner cavity, and then can be fixed by a fixing nut. A screw hole is provided at the center of the top outer wall of the lifting plate 7, and a lifting screw 8 is provided in the screw hole. The bottom of the lifting screw 8 is connected to the top outer wall of the movable seat 5 through a bearing. The bottom of the four groups of lifting rods 6 extend to the outer wall of the bottom of the top plate 3 and a sleeve 9 is provided. The lifting screw 8 can be rotated to make the lifting rod 6 drive the sleeve 9 to rise and fall, and change the position and angle of the center line of the shaft body 10 to meet the needs of various processing points of the boring hole. The shaft body 10 is located in the inner cavity of the sleeve 9;

[0025] See also Figure 3-4, the outer wall of the top of the sleeve 9 is provided with two groups of motors 11 in front and behind, and the output ends of the two groups of motors 11 on the opposite sides are both provided with gears 12, and the front and rear sides of the annular outer wall of the sleeve 9 are provided with annular grooves, and an annular connecting block 13 is slidably connected in the annular groove, and the annular connecting block 13 is fixedly sleeved with an outer gear ring 14 on the annular outer wall, and the outer walls of the two groups of annular connecting blocks 13 on the opposite sides are provided with gear rings 15, and the front and rear sides of the connection between the annular outer wall of the sleeve 9 and the two groups of annular connecting blocks 13 are provided with three groups of mounting holes in an annular array, and the mounting holes are provided with screw rods 16 through bearings, and the three groups of screw rods 16 on the same side of the upper and lower sides are provided with driven gears 17 on the opposite ends, and the two groups of driven gears 17 on the same side of the upper and lower sides are meshed with the outer walls of the opposite sides of the two groups of gear rings 15 at the opposite ends, and the screw rods 16 are located on the outer wall of the inner cavity of the sleeve 9 and are sleeved with U The U-shaped push block 20 has two output ends located at opposite sides of the three groups of U-shaped push blocks 20 on the same side. The two output ends of the U-shaped push block 20 are fixedly connected with a clamping block 18. The limit rods 19 are movably inserted on both sides of the connection between the screw rod 16 and the sleeve 9. One end of the limit rod 19 extends to the outside of the sleeve 9, and the other end of the limit rod 19 is fixedly connected to the clamping block 18. The two protruding ends of the U-shaped push block 20 are located between the limit rod 19 and the screw rod 16. The motor 11 drives the gear 12, the outer gear ring 14 and the annular connecting block 13 to rotate. The annular connecting block 13 drives the gear ring 15, the driven gear 17 and the screw rod 16 to rotate. The screw rod 16 rotates to make the U-shaped push block 20 push the clamping block 18 to move under the restriction of the limit rod 19. The three groups of clamping blocks 18 are close to each other to clamp the shaft body 10.

[0026] See also Figure 1-4 The outer wall of the shaft body 10 is provided with a slide groove 22 matched with the clamping block 18, and two groups of auxiliary centering blocks 25 are slidably connected in the slide groove 22. The outer walls of the three groups of auxiliary centering blocks 25 on the upper and lower sides are connected with an adjusting screw 24 on the opposite side through a bearing. The other end of the adjusting screw 24 extends to the outer wall of the sleeve 9 and is provided with a handle. The adjusting screw 24 is located outside the two groups of driven gears 17 on the front and rear sides. The outer wall of the sleeve 9 is movably plugged with a reference rod 26. The three groups of reference rods 26 on the upper and lower sides are fixedly connected to the auxiliary centering blocks 25 at one end. The adjusting screw 24 is rotated to change the distance between the three groups of auxiliary centering blocks 25, and then the slide groove 22 on the outer wall of the shaft body 10 is aligned with the auxiliary centering blocks 25 and inserted, which can adapt to the centering and fixation of shaft bodies 10 with different diameters.

[0027] See also Figure 2-3The sleeve 9 is composed of two groups of connecting rings and flanges, and the two groups of connecting rings are connected by flanges at opposite ends. The movable seat 5 includes a main board 51 connected to the bottom of the lifting screw rod 8 through a bearing. The outer walls of the front and rear sides of the main board 51 are fixed with plug rods 52, and the outer walls of the two groups of plug rods 52 on the left and right sides are sleeved with movable plates 53. The two groups of lifting rods 6 on the left and right sides are arranged on the left and right sides of the outer wall of the top of the movable plate 53, and the plug rod 52 is located between the two groups of lifting rods 6 on the left and right sides. The inner walls of the front and rear sides of the mounting groove 4 are provided with grooves matching the movable plate 53, and the outer wall of the top of the movable plate 53 is provided with a tightening screw matching the plug rod 52. A partition plate can be added between the two groups of flanges to increase the distance between the two groups of connecting rings, so that the distance between the front and rear two groups of fixed plug blocks 21 changes, which is suitable for fixing shaft bodies 10 of different lengths. When the distance between the front and rear two groups of connecting rings changes, the movable plate 53 moves in the grooves on the front and rear sides. After the adjustment is completed, the adjusting knob is tightened to fix the movable plate 53 on the plug rod 52;

[0028] See also Figure 1 The outer wall at the bottom of the sleeve 9 is provided with two sets of front and rear slide plates 27, the bottom of the slide plate 27 extends to the outer wall at the bottom of the mounting seat 1, and the mounting seat 1 is provided with a slot matched with the slide plate 27 to maintain the stability of the movement of the sleeve 9. The left outer wall of the sleeve 9 is provided with a screw 28 through a bearing, and the left end of the screw 28 extends to the left outer wall of the side plate 2. Rotating the screw 28 can change the horizontal position of the sleeve 9, thereby changing the centerline position and angle of the shaft body 10 to meet the needs of various processing points of the boring hole;

[0029] See also Figure 1-4 The three groups of clamping blocks 18 on the same side above and below are provided with a fixed plug block 21 at the opposite end, and the inner wall of the slide groove 22 is provided with a plug hole 23 that matches the fixed plug block 21 to fix the shaft body 10 to prevent the shaft body 10 from sliding during boring and reducing the boring accuracy;

[0030] See also Figure 1-4 The clamping block 18 and the auxiliary centering block 25 are arc blocks of the same shape and size. The arc block with a smaller arc length can adapt to shaft bodies 10 of different diameters.

[0031] The specific steps of using a shaft positioning device for a ship boring device for shipyard production and a method of using the device are as follows:

[0032] S1: When in use, the screw rod 24 is rotated and adjusted according to the scale line on the outer wall of the benchmark rod 26 according to the specifications of the shaft body 10 to change the distance between the three sets of auxiliary centering blocks 25. A partition plate can also be installed between the two sets of flanges to increase the distance between the two sets of connecting rings, so that the distance between the front and rear sets of fixed plug blocks 21 changes, which is suitable for fixing shaft bodies 10 of different lengths. The slide groove 22 on the outer wall of the shaft body 10 is aligned and inserted with the auxiliary centering block 25, which can adapt to the centering and fixing of shaft bodies 10 with different diameters;

[0033] S2: After the shaft body 10 is inserted, the motor 11 is started, the motor 11 drives the gear 12, the outer gear ring 14 and the annular connecting block 13 to rotate, the annular connecting block 13 drives the gear ring 15, the driven gear 17 and the screw 16 to rotate, the screw 16 rotates to make the U-shaped push block 20 push the clamping block 18 to move under the restriction of the limit rod 19, and the clamping block 18 is clamped into the slide groove 22, and the fixed plug block 21 enters the insertion hole 23, at this time the shaft body 10 is fixed in the inner cavity of the sleeve 9;

[0034] S3: After the shaft body 10 is fixed, the position of the sleeve 9 is changed by rotating the lifting screw 8 and the screw 28, thereby changing the position of the center line of the shaft body 10 and drilling holes at different angles on the front end surface of the shaft body 10.

[0035] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A shaft positioning device for a ship boring device used in shipyard production, comprising a mounting seat (1) and a shaft (10), characterized in that: The left and right sides of the top outer wall of the mounting seat (1) are provided with side panels (2), the tops of the two groups of side panels (2) are provided with top panels (3), the middle part of the top outer wall of the top panel (3) is provided with a mounting groove (4), a movable seat (5) is slidably connected in the mounting groove (4), the four corners of the top outer wall of the movable seat (5) are provided with through holes that penetrate up and down, and lifting rods (6) are movably inserted in the through holes, the tops of the four groups of lifting rods (6) are sleeved with lifting plates (7), the top threads of the lifting rods (6) at the connection between the circumferential outer wall and the lifting plate (7) are sleeved with fixing nuts, and the center of the top outer wall of the lifting plate (7) is provided with a through hole that penetrates up and down. A screw hole is provided, in which a lifting screw rod (8) is provided. The bottom of the lifting screw rod (8) is connected to the outer wall of the top of the movable seat (5) through a bearing. The bottom of the four groups of lifting rods (6) extends to the outer wall of the bottom of the top plate (3). A sleeve (9) is provided. The shaft body (10) is located in the inner cavity of the sleeve (9). The outer wall of the top of the sleeve (9) is provided with front and rear groups of motors (11). The output ends of the two groups of motors (11) on the opposite sides are both provided with gears (12). The front and rear sides of the annular outer wall of the sleeve (9) are both provided with annular grooves, and an annular connecting block (13) is slidably connected in the annular groove. The annular connecting block (13) is slidably connected in the annular groove. The connecting block (13) is provided with an outer gear ring (14) on the annular outer wall of the connecting block (13), and the outer walls of the two groups of annular connecting blocks (13) on the opposite sides thereof are provided with gear rings (15). The annular outer wall of the sleeve (9) and the two groups of annular connecting blocks (13) are connected at both sides thereof in an annular array at the front and rear sides thereof, and screw rods (16) are provided in the mounting holes through bearings. The three groups of screw rods (16) on the same upper and lower sides are provided with driven gears (17) on the opposite ends thereof, and the two groups of driven gears (17) on the same upper and lower sides are meshed with the outer walls of the two groups of gear rings (15) on the opposite sides thereof, and the screw rods (16) are located in the inner cavity of the sleeve (9). The outer wall of the U-shaped push block (20) is sleeved with a U-shaped push block (20), the two output ends of the U-shaped push block (20) are located on opposite sides of the three groups of U-shaped push blocks (20) on the same side, the two output ends of the U-shaped push block (20) are fixedly connected to the clamping block (18), and the two sides of the connection between the screw rod (16) and the sleeve (9) are movably connected with a limit rod (19), one end of the limit rod (19) extends to the outside of the sleeve (9), the other end of the limit rod (19) is fixedly connected to the clamping block (18), and the two protruding ends of the U-shaped push block (20) are located between the limit rod (19) and the screw rod (16); The circumferential outer wall of the shaft body (10) is provided with a slide groove (22) matched with the clamp block (18), and two groups of front and rear auxiliary centering blocks (25) are slidably connected in the slide groove (22); the outer walls of the three groups of auxiliary centering blocks (25) on the same upper and lower sides are connected to an adjusting screw rod (24) through a bearing on the opposite side, and the other end of the adjusting screw rod (24) extends to the outer wall of the sleeve (9) and is provided with a handle, and the adjusting screw rod (24) is located outside the two groups of driven gears (17) on the same front and rear sides, and a reference rod (26) is movably inserted into the circumferential outer wall of the sleeve (9), and the three groups of reference rods (26) on the same upper and lower sides are fixedly connected to the auxiliary centering blocks (25) at opposite ends; The three groups of clamping blocks (18) on the same upper and lower sides are provided with fixed plug blocks (21) at opposite ends, and the inner wall of the slide groove (22) is provided with a plug hole (23) matching with the fixed plug block (21); The sleeve (9) is composed of two groups of connecting rings and flanges; the two groups of connecting rings are connected at opposite ends by flanges; the movable seat (5) includes a main board (51) connected to the bottom of the lifting screw (8) by bearings; the outer walls of the front and rear sides of the main board (51) are fixed with plug rods (52); the outer walls of the two groups of the plug rods (52) on the same left and right sides are sleeved with movable plates (53); the two groups of the lifting rods (6) on the same left and right sides are arranged on the left and right sides of the top outer wall of the movable plate (53), and the plug rod (52) is located between the two groups of the lifting rods (6) on the same left and right sides; the inner walls of the front and rear sides of the mounting groove (4) are provided with grooves matching the movable plate (53); the outer wall of the top of the movable plate (53) is provided with tightening screws matching the plug rods (52); The outer wall at the bottom of the sleeve (9) is provided with two groups of front and rear slide plates (27), the bottom of the slide plates (27) extends to the outer wall at the bottom of the mounting seat (1), and the mounting seat (1) is provided with a slot matched with the slide plates (27), and the left outer wall of the sleeve (9) is provided with a screw rod (28) through a bearing, and the left end of the screw rod (28) extends to the left outer wall of the side plate (2).

2. The shaft positioning device for a ship boring device used in shipyard production according to claim 1, characterized in that: The clamping block (18) and the auxiliary centering block (25) are arc-shaped blocks with the same shape and size.

3. The method for using the shaft positioning device of a ship boring device for shipyard production according to any one of claims 1 to 2, characterized in that: The method of use includes the following steps: S1: When in use, the screw rod (24) is rotated and adjusted according to the scale line on the outer wall of the reference rod (26) according to the specifications of the shaft body (10), the distance between the three sets of auxiliary centering blocks (25) is changed, a partition is installed between the two sets of flanges, the distance between the two sets of connecting rings is increased, and the distance between the front and rear sets of fixed plug blocks (21) is changed to adapt to the fixation of shaft bodies (10) of different lengths. The slide groove (22) on the outer wall of the shaft body (10) is aligned and inserted with the auxiliary centering block (25), which can adapt to the centering and fixation of shaft bodies (10) with different diameters; S2: After the shaft body (10) is inserted, the motor (11) is started, the motor (11) drives the gear (12), the outer gear ring (14) and the annular connecting block (13) to rotate, the annular connecting block (13) drives the gear ring (15), the driven gear (17) and the screw (16) to rotate, the screw (16) rotates so that the U-shaped push block (20) pushes the clamping block (18) to move under the restriction of the limit rod (19), the clamping block (18) is clamped into the slide groove (22), and the fixed plug block (21) enters the insertion hole (23), at this time, the shaft body (10) is fixed in the inner cavity of the sleeve (9); S3: After the shaft body (10) is fixed, the position of the sleeve (9) is changed by rotating the lifting screw (8) and the screw (28), thereby changing the position of the center line of the shaft body (10) and drilling holes at different angles on the front end surface of the shaft body (10).

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