Pre-alignment device

Abstract

The invention discloses a pre-alignment device, and relates to the technical field of workpiece alignment. The pre-alignment device comprises a machine base, a rotary table, a first driving assembly, a positioning disc and a measuring assembly, the rotary table is rotatably arranged on the machine base in the direction of the axis of the rotary table, the first driving assembly is used for driving the rotary table to rotate, the positioning disc is arranged on the rotary table, the measuring assembly is arranged on the machine base, and at least one zero point positioner is arranged on the positioning disc. According to the pre-alignment device, pre-alignment of the workpiece can be achieved through cooperation of the positioning disc, the zero point positioner and the measuring assembly, the workpiece does not need to be aligned on a machine tool, the machining efficiency of the workpiece is improved, and the productivity utilization rate of the machine tool is improved.

Description

Technical Field

[0001] The present application relates to the technical field of workpiece alignment, and in particular to a pre-alignment device. Background Art

[0002] A machine tool is a device used to manufacture machines and machinery. When in use, the workpiece is placed on the zero point locator on the machine tool, and then the workpiece is processed by the tool on the machine tool. However, in order to ensure the processing accuracy of the workpiece, the workpiece needs to be aligned after it is placed on the machine tool. The workpiece can only be processed after the alignment is completed, which not only greatly reduces the processing efficiency of the workpiece, but also reduces the capacity utilization rate of the machine tool. Summary of the invention

[0003] In order to overcome the deficiencies of the prior art, the present application provides a pre-alignment device.

[0004] The pre-alignment device provided in this application adopts the following technical solution: A pre-alignment device includes a machine base, a turntable rotatable around its own axis and arranged on the machine base, a first driving component for driving the turntable to rotate, a positioning plate arranged on the turntable, and a measuring component arranged on the machine base, wherein at least one zero point locator is arranged on the positioning plate.

[0005] By adopting the above technical solution, the workpiece can be pre-aligned through the cooperation of the positioning plate, the zero point locator and the measuring component, and there is no need to align the workpiece on the machine tool. This not only improves the processing efficiency of the workpiece, but also improves the capacity utilization of the machine tool.

[0006] Preferably, the positioning plate is detachably connected to the turntable, a mounting ring is provided at one end of the positioning plate facing the turntable, a plurality of locking claws are arranged on the turntable at intervals around its own circumference, the plurality of locking claws are hinged to the turntable, and the plurality of locking claws can be relatively closed and abut against the peripheral side of the mounting ring, or relatively opened and away from the mounting ring.

[0007] By adopting the above technical solution, the positioning disc can be quickly disassembled and assembled with the turntable through the cooperation of multiple locking claws, which makes it convenient for operators to replace different types of positioning discs according to the alignment requirements of different workpieces.

[0008] Preferably, the pre-alignment device also includes a slide seat provided on the turntable and movable along the axial direction of the turntable, and a second driving component for driving the slide seat to move, the axis centerline of the slide seat coincides with the axis centerline of the turntable, a transmission groove is provided on the circumferential side ring of the slide seat, and the locking claw includes two claw arms arranged in an L shape, one of the two claw arms is embedded in the transmission groove, and the other is arranged toward the mounting ring.

[0009] By adopting the above technical solution, multiple locking claws can move stably under the limiting effect of the transmission groove, avoiding the locking claws from deflecting during the movement, and effectively improving the locking effect of the multiple locking claws.

[0010] Preferably, the turntable includes a turntable and a pedestal supported on the bottom of the turntable, the turntable is provided with a sliding cavity for the slide to move, the second driving assembly includes a first base provided on the pedestal, a second driving rod provided on the first base and extending from the pedestal to the turntable, and a driving head threadedly connected to an end of the second driving rod away from the first base, the slide is located between the first base and the driving head, and an elastic member is also provided on the pedestal, and the elastic member is connected to the slide.

[0011] By adopting the above technical solution, the slide can achieve reciprocating motion through the cooperation of the drive head and the elastic member, and the operator can accurately adjust the position of the slide by rotating the drive head, thereby achieving precise control of multiple locking claws, effectively improving the locking effect of multiple locking claws.

[0012] Preferably, the turntable includes a plurality of disk bodies surrounding the circumference of the sliding seat, the plurality of disk bodies enclosing the sliding cavity, a locking groove being formed between each two adjacent disk bodies, the plurality of locking claws being embedded in the plurality of locking grooves one by one, and the two side portions of each locking claw being hinged to the two side groove walls of the corresponding locking groove.

[0013] By adopting the above technical solution, multiple locking claws can move in corresponding locking grooves respectively, thereby further preventing the multiple locking claws from deviating during the movement, and effectively improving the locking effect of the multiple locking claws.

[0014] Preferably, the first driving assembly includes a first driving rod rotatable around its own axial direction and arranged on the machine base, a first driving member for driving the first driving rod to rotate, a threaded ring sleeved on the first driving rod, a driving disk coaxially connected to an end of the turntable away from the positioning disk, and a serrated ring surrounding the circumferential disk surface of the driving disk, and the threaded ring is meshed with the serrated ring.

[0015] By adopting the above technical solution, the turntable can be accurately rotated under the transmission cooperation of the threaded ring and the serrated ring, which makes it easier for the measuring component to accurately measure the workpiece on the turntable.

[0016] Preferably, the serrated ring includes a plurality of saw teeth, a plurality of tooth grooves are formed between the plurality of saw teeth, a limit seat is further provided on the machine base, the limit seat is rotatably connected to the first driving rod, the limit seat is provided with a limit rod movably arranged in a direction approaching or away from the driving disk, and a second driving member for driving the limit rod to move, and the limit rod can be selectively inserted into one of the plurality of tooth grooves during its movement.

[0017] By adopting the above technical solution, the limit rod can be inserted into the tooth groove and position the driving disk to stop the turntable at a corresponding rotation position, which is convenient for the operator to align the corresponding part of the workpiece according to the measurement results.

[0018] Preferably, the measuring assembly is located on a side of the positioning plate away from the turntable, and includes a measuring frame and a measuring instrument arranged on the measuring frame. The measuring frame is movably arranged along the axial and radial directions of the turntable respectively, and the pre-alignment device also includes a third driving assembly for driving the measuring frame to move.

[0019] By adopting the above technical solution, the relative position between the measuring frame and the workpiece can be changed according to measurement needs, thereby effectively improving the measurement range of the measuring instrument.

[0020] Preferably, the third driving assembly includes a first driving seat disposed on the machine base and movable along the axial direction of the turntable, a third driving member for driving the first driving seat to move, a second driving seat disposed on the machine base and movable along the radial direction of the turntable, and a fourth driving member for driving the second driving seat to move, a first connecting rod is hinged on the first driving seat, a second connecting rod is hinged on the first connecting rod, a third connecting rod is hinged on the second driving seat, a fourth connecting rod is hinged on the third connecting rod, the second connecting rod and the fourth connecting rod are respectively hinged to the measuring frame, a rotation axis between the first connecting rod and the first driving seat, a rotation axis between the first connecting rod and the second connecting rod, and a rotation axis between the second connecting rod and the measuring frame are respectively parallel to the axial direction of the turntable, and a rotation axis between the third connecting rod and the second driving seat, a rotation axis between the third connecting rod and the fourth connecting rod, and a rotation axis between the fourth connecting rod and the measuring frame are respectively parallel to the radial direction of the turntable.

[0021] By adopting the above technical solution, the measuring frame can realize reciprocating motion in the axial and radial directions of the turntable under the cooperation of the first drive seat, the first connecting rod, the second connecting rod, the second drive seat, the third connecting rod and the fourth connecting rod, effectively eliminating the moving dead angle of the measuring frame and further improving the measuring range of the measuring instrument.

[0022] Preferably, the machine base includes a base body, a barrel arranged on the base body for accommodating the turntable, two machine ports respectively opened on opposite sides of the barrel, a machine door movably arranged around the circumference of the turntable, and a fifth driving member for driving the machine door to move, and the machine door can selectively close the two machine ports during its movement.

[0023] By adopting the above technical solution, the two machine ports can respectively realize the input and output of workpieces, and the movable machine door can close one of the machine ports to prevent the workpiece from falling out from the opposite machine port during the input or output process.

[0024] In summary, the present invention includes at least one of the following beneficial technical effects: The workpiece can be pre-aligned through the cooperation of the positioning plate, zero point locator and measuring components, and there is no need to align the workpiece on the machine tool. This not only improves the processing efficiency of the workpiece, but also improves the capacity utilization of the machine tool. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a schematic diagram of the three-dimensional structure of the pre-alignment device in the embodiment of the present application; Figure 2 yes Figure 1 A front view of Figure 3 yes Figure 2 AA section diagram in; Figure 4 yes Figure 2 BB cross-section diagram in; Figure 5 yes Figure 3 The enlarged schematic diagram of point C in FIG. Figure 6 yes Figure 4 The enlarged schematic diagram of D in FIG. Figure 7 It is a schematic diagram of the three-dimensional structure of the third driving component in the embodiment of the present application.

[0026] Markings in the accompanying drawings: 1. Machine base; 1a. Base body; 1b. Machine barrel; 1c. Machine mouth; 1d. Machine door; 1e. Fifth driving member; 2. Turntable; 2a. Turntable; 2a1. Plate body; 2b. Base; 2c. Sliding cavity; 2d. Locking groove; 2e. Mounting groove; 3. First driving assembly; 3a. First driving rod; 3b. First driving member; 3c. Threaded ring; 3d. Driving disk; 3e. Sawtooth ring; 4. Positioning disk; 4a. Mounting ring; 5. Measuring assembly; 5a. Measuring frame; 5b. Measuring instrument; 5c. Third driving assembly; 5c1. First driving base; 5c2. Third driving member; 5c3. Second driving base; 5c4, fourth driving member; 5c5, first connecting rod; 5c6, second connecting rod; 5c7, third connecting rod; 5c8, fourth connecting rod; 5c9, third driving seat; 5c10, sixth driving member; 5c11, fifth connecting rod; 5c12, sixth connecting rod; 6, zero point locator; 7, locking claw; 8, sliding seat; 8a, transmission groove; 9, second driving assembly; 9a, first base; 9b, second driving rod; 9c, driving head; 9d, elastic member; 10, limiting seat; 11, limiting rod; 12, second driving member; 13, first side plate; 14, second side plate; 15, operation port; 16, second base. DETAILED DESCRIPTION

[0027] The following is combined with Figure 1-7 The present invention is described in further detail.

[0028] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0029] See also Figure 1-Figure 7As shown, a pre-alignment device is shown, including a machine base 1, a cylindrical turntable 2 rotatable around its own axial direction and arranged on the machine base 1, a first driving component 3 for driving the turntable 2 to rotate, a positioning plate 4 coaxially arranged on the turntable 2, and a measuring component 5 arranged on the machine base 1, and four zero point locators 6 are arranged at intervals on the positioning plate 4. Among them, the machine base 1 includes a base body 1a, a barrel 1b uprightly arranged on the base body 1a, a turntable 2 is rotatably arranged in the barrel 1b around a vertical direction, a positioning plate 4 is arranged at the upper end of the turntable 2, and a climbing step is arranged on the base body 1a to facilitate operators to climb and operate the workpiece in the barrel 1b; the zero point locator 6 is a prior art, which can realize the zero point positioning of the workpiece. The specific structure and principle are not repeated here, and the number of zero point locators 6 on the positioning plate 4 can also be flexibly selected according to specific needs; the measuring component 5 includes a measuring instrument 5b, which is a dial indicator, which can measure parameters such as circular runout, cylindricity, coaxiality, axial size, etc. when the workpiece rotates, so that the operator can align the workpiece according to the measurement results.

[0030] Before processing the workpiece, the workpiece is pre-placed on the zero-point locator 6 on the positioning disk 4, and then the turntable 2 drives the workpiece to rotate, and the measuring component 5 measures the relevant parameters of the workpiece during rotation. Then the operator adjusts the zero-point locator 6 to achieve the alignment of the workpiece, and simultaneously adjusts the zero-point locator on the machine tool. The adjustment parameters are consistent with the adjustment parameters of the zero-point locator 6 on the positioning disk 4. After the alignment is completed, the workpiece is directly transferred to the zero-point locator on the machine tool. There is no need to align the workpiece on the machine tool. This not only improves the processing efficiency of the workpiece, but also improves the capacity utilization rate of the machine tool.

[0031] In this embodiment, combined with Figure 3 and Figure 5 As shown, the positioning disc 4 is detachably connected to the turntable 2, a cylindrical mounting ring 4a is coaxially arranged at the lower end of the positioning disc 4, and three locking claws 7 are arranged around the turntable 2 at intervals in the circumferential direction. The three locking claws 7 are hinged to the turntable 2, and the three locking claws 7 can be relatively closed and abut against the circumferential side of the mounting ring 4a, or relatively opened and away from the mounting ring 4a. The positioning disc 4 can be quickly disassembled and assembled with the turntable 2 through the cooperation of the three locking claws 7, which is convenient for the operator to replace different types of positioning discs 4 according to the alignment requirements of different workpieces.

[0032] Furthermore, the pre-alignment device also includes a slide 8 movable in the vertical direction and arranged in the turntable 2, and a second driving assembly 9 for driving the slide 8 to move. The axis of the slide 8 coincides with the axis of the turntable 2, and a transmission groove 8a is arranged on the peripheral ring of the slide 8. The locking claw 7 includes two claw arms arranged in an L shape, one of which is movably embedded in the transmission groove 8a, and the other is arranged toward the mounting ring 4a. During the movement of the three locking claws 7, one of the claw arms is accommodated in the transmission groove 8a, and the slide 8 drives the claw arm to rise and fall during its lifting process, and the other claw arm is stably opened or retracted under the drive of the claw arm, which effectively avoids the displacement of the locking claw 7 during the movement process and improves the locking effect of the three locking claws 7.

[0033] In this embodiment, combined with Figure 4 and Figure 6 As shown, the turntable 2 includes a turntable 2a and a base 2b supported on the bottom of the turntable 2a. The turntable 2a includes three disk bodies 2a1 surrounding the sides of the slide 8. The three disk bodies 2a1 form a sliding cavity 2c for the slide 8 to move. A locking groove 2d is formed between each two adjacent disk bodies 2a1. Three locking claws 7 are embedded in the three locking grooves 2d one by one, and the two side portions of each locking claw 7 are hinged to the two side groove walls of the corresponding locking groove 2d.

[0034] Combine again Figure 3 and Figure 5 As shown, a mounting groove 2e coaxially connected to the sliding cavity 2c is provided on the base 2b, and the second driving assembly 9 includes a first base 9a embedded in the bottom wall of the mounting groove 2e, a second driving rod 9b provided on the first base 9a and passing through the mounting groove 2e along the vertical direction, and a driving head 9c threadedly connected to the upper end of the second driving rod 9b, the driving head 9c is a bolt, and a screw groove matching the bolt thread is provided on the upper end of the second driving rod 9b, the sliding seat 8 is located between the first base 9a and the driving head 9c, and an elastic member 9d is also provided in the mounting groove 2e, and the elastic member 9d is a spring, and the two ends of the elastic member 9d are respectively connected to the bottom of the mounting groove 2e and the sliding seat 8, and an operating port 15 is also provided at the center of the positioning plate 4, and the operating port 15 is connected to the sliding cavity 2c, so that the operator can conveniently operate the driving head 9c.

[0035] When the positioning disk 4 needs to be fixed, the operator gradually tightens the driving head 9c, and the driving head 9c pushes the slide 8 downward, and the three locking claws 7 are relatively retracted and locked to the mounting ring 4a under the drive of the slide 8; when the positioning disk 4 needs to be removed, the operator loosens the driving head 9c, and the slide 8 is reset upward under the action of the elastic member 9d after losing the extrusion, and the three locking claws 7 are relatively opened under the drive of the slide 8, and the positioning disk 4 can be conveniently removed at this time. The operator can achieve precise adjustment of the position of the slide 8 by rotating the driving head 9c, thereby achieving precise control of the three locking claws 7, and effectively improving the locking effect of the three locking claws 7.

[0036] In this embodiment, combined with Figure 5 As shown, a hollow second base 16 is also provided in the barrel 1b, and the turntable 2 is rotatably provided on the second base 16. The first driving assembly 3 includes a first driving rod 3a rotatably provided in the second base 16 around its own axis, a first driving member 3b for driving the first driving rod 3a to rotate, a threaded ring 3c sleeved on the first driving rod 3a, a driving disk 3d coaxially connected to the lower end of the turntable 2 and accommodated in the second base 16, and a sawtooth ring 3e surrounding the circumferential disk surface of the driving disk 3d, and the threaded ring 3c is meshed with the sawtooth ring 3e. Among them, the first driving rod 3a is located below the driving disk 3d and its axis extends in the horizontal direction, and the first driving member 3b is a motor. The motor drives the first driving rod 3a to rotate around the horizontal direction, and the sawtooth ring 3e is provided on the lower end surface of the driving disk 3d. The first driving rod 3a drives the driving disk 3d to rotate through the transmission cooperation of the threaded ring 3c and the sawtooth ring 3e, and the driving disk 3d drives the turntable 2 to rotate. Through the precise transmission cooperation between the threaded ring 3 c and the serrated ring 3 e , the rotation accuracy of the turntable 2 can be improved, making it easier for the measuring component 5 to accurately measure the workpiece on the turntable 2 .

[0037] In this embodiment, the sawtooth ring 3e includes a plurality of saw teeth, and a plurality of tooth grooves are formed between the saw teeth. A limit seat 10 is also provided on the machine base 1. The limit seat 10 is located at one end of the first driving rod 3a and is rotatably connected to the first driving rod 3a. The limit seat 10 is provided with a limit rod 11 that is movable in the vertical direction and a second driving member 12 for driving the limit rod 11 to move. The second driving member 12 is a cylinder. The limit rod 11 can be selectively inserted into a plurality of tooth grooves during its movement. After the measurement is completed, the limit rod 11 can be inserted into the tooth groove and position the driving disk 3d at the corresponding rotation position, so that the operator can align the corresponding part of the workpiece according to the measurement results.

[0038] In this embodiment, combined with Figure 1 and Figure 7As shown, the measuring assembly 5 is located above the positioning plate 4, and it also includes a measuring frame 5a, and the measuring instrument 5b is arranged on the measuring frame 5a. The measuring frame 5a is movable along the axial direction of the turntable 2 and its two mutually perpendicular radial directions, and the pre-alignment device also includes a third driving assembly 5c for driving the measuring frame 5a to move. Among them, the axial direction of the turntable 2 extends along the vertical direction, and the axial direction is defined as the Z-axis direction. The two mutually perpendicular radial directions of the turntable 2 extend along the horizontal direction, and the two radial directions are defined as the X-axis direction and the Y-axis direction, respectively. The measuring frame 5a can move along the X-axis direction, the Y-axis direction and the Z-axis direction respectively under the drive of the third driving assembly 5c, so as to change the relative position with the workpiece according to the measurement needs, and effectively improve the measurement range of the measuring instrument 5b.

[0039] In this embodiment, a first side plate 13 and a second side plate 14 are disposed vertically and perpendicular to each other in the barrel 1b. Figure 7 As shown, the third driving assembly 5c includes a first driving seat 5c1 movable along the Z-axis direction and arranged on the side of the first side plate 13, a third driving member 5c2 for driving the first driving seat 5c1 to move, a second driving seat 5c3 movable along the X-axis direction and arranged on the upper part of the first side plate 13, a fourth driving member 5c4 for driving the second driving seat 5c3 to move, a third driving seat 5c9 movable along the Y-axis direction and arranged in the middle of the second side plate 14, and a sixth driving member 5c10 for driving the third driving seat 5c9 to move, wherein the third driving member 5c2, the fourth driving member 5c4 and the sixth driving member 5c10 are respectively motor pulley structures, and the third driving member 5c2 and the sixth driving member 5c10 are respectively located at both ends of the fourth driving member 5c4.

[0040] The first driving seat 5c1 is hinged with a first connecting rod 5c5, the first connecting rod 5c5 is hinged with a second connecting rod 5c6, the second driving seat 5c3 is hinged with a third connecting rod 5c7, the third connecting rod 5c7 is hinged with a fourth connecting rod 5c8, the third driving seat 5c9 is hinged with a fifth connecting rod 5c11, the fifth connecting rod 5c11 is hinged with a sixth connecting rod 5c12, the second connecting rod 5c6, the fourth connecting rod 5c8 and the sixth connecting rod 5c12 are hinged with the measuring frame 5a respectively, and the rotation axis between the first connecting rod 5c5 and the first driving seat 5c1, the rotation axis between the first connecting rod 5c5 and the second connecting rod 5c6 The rotation axis between them and the rotation axis between the second connecting rod 5c6 and the measuring frame 5a are respectively parallel to the Z-axis direction, the rotation axis between the third connecting rod 5c7 and the second driving seat 5c3, the rotation axis between the third connecting rod 5c7 and the fourth connecting rod 5c8, and the rotation axis between the fourth connecting rod 5c8 and the measuring frame 5a are respectively parallel to the X-axis direction, the rotation axis between the fifth connecting rod 5c11 and the third driving seat 5c9, the rotation axis between the fifth connecting rod 5c11 and the sixth connecting rod 5c12, and the rotation axis between the sixth connecting rod 5c12 and the measuring frame 5a are respectively parallel to the Y-axis direction.

[0041] In this way, through the movement coordination among the first driving seat 5c1, the first connecting rod 5c5, the second connecting rod 5c6, the second driving seat 5c3, the third connecting rod 5c7, the fourth connecting rod 5c8, the third driving seat 5c9, the fifth connecting rod 5c11 and the sixth connecting rod 5c12, the measuring frame 5a can move arbitrarily within the travel range of the third driving member 5c2, the fourth driving member 5c4 and the sixth driving member 5c10, effectively eliminating the moving blind spots of the measuring frame 5a and further improving the measuring range of the measuring instrument 5b.

[0042] In this embodiment, again combined Figure 1 As shown, the machine base 1 also includes two machine ports 1c respectively opened on opposite sides of the barrel 1b, a machine door 1d movably arranged around the circumference of the turntable 2, and a fifth driving member 1e for driving the machine door 1d to move. The fifth driving member 1e is a motor. A guide rail for the machine door 1d to move is arranged in the barrel 1b. The machine door 1d can selectively close the two machine ports 1c during its movement. The two machine ports 1c can respectively realize the input and output of workpieces, and the movable machine door 1d can close one of the machine ports 1c to prevent the workpiece from falling out from the machine port 1c on the opposite side during the input or output process.

[0043] The embodiments of this specific implementation method are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A pre-alignment device, characterized in that: The invention comprises a machine base (1), a turntable (2) arranged on the machine base (1) and rotatable around its own axis, a first driving component (3) for driving the turntable (2) to rotate, a positioning plate (4) arranged on the turntable (2), and a measuring component (5) arranged on the machine base (1), wherein at least one zero point locator (6) is arranged on the positioning plate (4).

2. A pre-alignment device according to claim 1, characterized in that: The positioning plate (4) is detachably connected to the turntable (2); a mounting ring (4a) is provided at one end of the positioning plate (4) facing the turntable (2); a plurality of locking claws (7) are arranged at intervals around the turntable (2) itself in the circumferential direction; the plurality of locking claws (7) are hinged to the turntable (2); the plurality of locking claws (7) can be relatively closed and abut against the peripheral side of the mounting ring (4a), or relatively opened and away from the mounting ring (4a).

3. A pre-alignment device according to claim 2, characterized in that: The pre-alignment device also includes a slide (8) disposed on the turntable (2) and movable along the axial direction of the turntable (2), and a second drive assembly (9) for driving the slide (8) to move, the axis of the slide (8) coincides with the axis of the turntable (2), a transmission groove (8a) is provided on the circumferential side ring of the slide (8), and the locking claw (7) includes two claw arms arranged in an L shape, one of the two claw arms is embedded in the transmission groove (8a), and the other is arranged toward the mounting ring (4a).

4. A pre-alignment device according to claim 3, characterized in that: The turntable (2) comprises a turntable (2a), a pedestal (2b) supported on the bottom of the turntable (2a), a sliding cavity (2c) for the slide (8) to move is provided on the turntable (2a), the second driving assembly (9) comprises a first base (9a) provided on the pedestal (2b), a second driving rod (9b) provided on the first base (9a) and extending in the direction from the pedestal (2b) to the turntable (2a), and a driving head (9c) threadedly connected to an end of the second driving rod (9b) away from the first base (9a), the slide (8) is located between the first base (9a) and the driving head (9c), and an elastic member (9d) is also provided on the pedestal (2b), and the elastic member (9d) is connected to the slide (8).

5. A pre-alignment device according to claim 4, characterized in that: The turntable (2a) includes a plurality of disk bodies (2a1) surrounding the circumference of the sliding seat (8), the plurality of disk bodies (2a1) enclosing the sliding cavity (2c), a locking groove (2d) being formed between each two adjacent disk bodies (2a1), the plurality of locking claws (7) being respectively embedded in the plurality of locking grooves (2d), and the two side portions of each locking claw (7) are respectively hinged to the two side groove walls of the corresponding locking groove (2d).

6. A pre-alignment device according to claim 1, characterized in that: The first driving assembly (3) comprises a first driving rod (3a) rotatable around its own axis and arranged on the machine base (1), a first driving member (3b) for driving the first driving rod (3a) to rotate, a threaded ring (3c) sleeved on the first driving rod (3a), a driving disk (3d) coaxially connected to an end of the turntable (2) away from the positioning disk (4), and a serrated ring (3e) surrounding the circumferential disk surface of the driving disk (3d), wherein the threaded ring (3c) is meshed with the serrated ring (3e).

7. A pre-alignment device according to claim 6, characterized in that: The sawtooth ring (3e) includes a plurality of saw teeth, and a plurality of tooth grooves are formed between the plurality of saw teeth. A limit seat (10) is also provided on the machine base (1), and the limit seat (10) is rotatably connected to the first driving rod (3a). The limit seat (10) is provided with a limit rod (11) that is movable in a direction approaching or away from the driving disk (3d), and a second driving member (12) for driving the limit rod (11) to move. The limit rod (11) can be selectively inserted into one of the plurality of tooth grooves during its movement.

8. A pre-alignment device according to claim 1, characterized in that: The measuring assembly (5) is located on a side of the positioning plate (4) away from the turntable (2), and comprises a measuring frame (5a) and a measuring instrument (5b) arranged on the measuring frame (5a). The measuring frame (5a) is movably arranged along the axial direction and radial direction of the turntable (2). The pre-alignment device also comprises a third driving assembly (5c) for driving the measuring frame (5a) to move.

9. A pre-alignment device according to claim 8, characterized in that: The third driving assembly (5c) comprises a first driving seat (5c1) which is movable along the axial direction of the turntable (2) and is arranged on the machine base (1), a third driving member (5c2) used to drive the first driving seat (5c1) to move, a second driving seat (5c3) which is movable along the radial direction of the turntable (2) and is arranged on the machine base (1), and a fourth driving member (5c4) used to drive the second driving seat (5c3) to move, wherein a first connecting rod (5c5) is hingedly connected to the first driving seat (5c1), a second connecting rod (5c6) is hingedly connected to the first connecting rod (5c5), a third connecting rod (5c7) is hingedly connected to the second driving seat (5c3), and a fourth connecting rod (5c8) is hingedly connected to the third connecting rod (5c7). The second connecting rod (5c6) and the fourth connecting rod (5c8) are respectively hinged to the measuring frame (5a); the rotation axis between the first connecting rod (5c5) and the first driving seat (5c1), the rotation axis between the first connecting rod (5c5) and the second connecting rod (5c6), and the rotation axis between the second connecting rod (5c6) and the measuring frame (5a) are respectively parallel to the axial direction of the turntable (2); the rotation axis between the third connecting rod (5c7) and the second driving seat (5c3), the rotation axis between the third connecting rod (5c7) and the fourth connecting rod (5c8), and the rotation axis between the fourth connecting rod (5c8) and the measuring frame (5a) are respectively parallel to the radial direction of the turntable (2).

10. A pre-alignment device according to claim 1, characterized in that: The machine base (1) comprises a base body (1a), a barrel (1b) arranged on the base body (1a) for accommodating the turntable (2), two machine ports (1c) respectively opened on two opposite sides of the barrel (1b), a machine door (1d) movably arranged around the circumference of the turntable (2), and a fifth driving member (1e) for driving the machine door (1d) to move, wherein the machine door (1d) can selectively close the two machine ports (1c) during its movement.

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