CN114871745A

CN114871745A - Screw machine

Info

Publication number: CN114871745A
Application number: CN202210627330.8A
Authority: CN
Inventors: 汪恒坤; 李志明
Original assignee: Hefei Yanli Electronic Technology Co ltd
Current assignee: Hefei Yanli Electronic Technology Co ltd
Priority date: 2022-06-01
Filing date: 2022-06-01
Publication date: 2022-08-09
Anticipated expiration: 2042-06-01
Also published as: CN114871745B

Abstract

The invention discloses a screw machine, which comprises a turnover component, a rotating platform and a reverse folding component, wherein a rotating shaft is fixedly connected to the center of the rotating platform, a plurality of fixing components are annularly and uniformly distributed on the rotating platform by taking the rotating shaft as the center, a servo motor drives the rotating shaft to rotate, the rotating platform is correspondingly provided with a feeding station and a screw station, a feeding manipulator and a plurality of screw manipulators are arranged on the periphery of the rotating platform, the reverse folding component is arranged corresponding to the fixing components positioned on the feeding station, each screw manipulator is arranged corresponding to the fixing components positioned on the screw station one by one, the reverse folding component is arranged corresponding to the feeding manipulator, and the feeding manipulator is arranged between the turnover component and the reverse folding component; the automatic screw mounting device adopts an automatic assembly line, adopts automatic operation of turning, reverse folding and screw mounting, has high production efficiency, greatly improves the screw mounting accuracy and reduces the error rate.

Description

Screw machine

Technical Field

The invention relates to the technical field of display processing, in particular to a screw machine.

Background

The PCB board sets up at the screen back often with current display, and screen and PCB board pass through flexible PCB or FPC data connection, and screen and PCB board are generally through the bolt fastening relative position simultaneously, and the fixed mounting of current bolt carries out the manual work to counterpoint to screen and PCB board through the operator and accomplishes the screw operation of beating, and the fifty percent discount overlapping location of screen and PCB board receives artifical proficiency to influence, so production efficiency is low, and the installation error rate is high.

In view of the above-mentioned drawbacks, the inventors of the present invention have finally obtained the present invention through a long period of research and practice.

Disclosure of Invention

In order to solve the technical defects, the invention adopts the technical scheme that the screw machine comprises a turnover component, a rotary platform and a reverse folding component, a rotating shaft is fixedly connected at the center of the rotating platform, a plurality of fixing components are annularly and uniformly distributed on the rotating platform by taking the rotating shaft as the center, a servo motor drives the rotating shaft to rotate, the rotary platform is correspondingly provided with a feeding station and a screw station, the feeding manipulator and a plurality of screw manipulators are arranged on the periphery of the rotary platform, the reverse folding assembly is arranged corresponding to the fixing assembly positioned at the feeding station, each screw manipulator is arranged corresponding to the fixing assembly positioned at the screw station one by one, the reverse-folding component and the feeding manipulator are correspondingly arranged, and the feeding manipulator is arranged between the turnover component and the reverse-folding component.

Preferably, the reverse-folding assembly comprises a moving part, a rotating part and a clamping part, the rotating part is arranged on the moving part, the clamping part is arranged on the rotating part, the PCB is fixed on the rotating part by the clamping part, and the rotating part drives the PCB to overturn and is arranged above a screen on the fixing assembly.

Preferably, the rotating part includes a fixed mount, a rotating mount and a rotating electrical machine, the fixed mount is fixedly disposed on the slider of the moving part, two ends of the rotating mount are movably connected to the fixed mount through a rotating base, the rotating electrical machine is fixedly disposed on the fixed mount, and an output shaft of the rotating electrical machine is fixedly connected to the rotating base.

Preferably, the fixed frame comprises a fixed plate and two first connecting plates symmetrically arranged at two ends of the fixed plate, the rotating frame comprises a rotating plate and two second connecting plates symmetrically arranged at two ends of the rotating plate, the two second connecting plates are respectively fixedly connected with the two rotating seats, the fixed plate and the rotating plate are arranged in parallel, a rotating hole is formed in the first connecting plate, the two rotating holes are coaxially arranged, a rotating shaft is arranged in the rotating hole, the rotating shaft is fixedly arranged on one rotating seat, an output shaft of the rotating motor is arranged in the other rotating hole, and the output shaft of the rotating motor is fixedly connected with the other rotating seat.

Preferably, the clamping portion comprises two clamping modules which are symmetrically arranged, the two clamping modules are arranged on the rotating plate, the clamping portion comprises a clamping block, a clamping guide rail, a clamping slider and a clamping cylinder, the clamping cylinder and the clamping guide rail are fixedly arranged on the rotating plate, the telescopic rod of the clamping cylinder is in the same extension direction as the clamping guide rail, the clamping slider is arranged on the clamping guide rail in a sliding manner, the clamping block is fixedly arranged on the clamping slider, and the extension directions of the clamping guide rails on the two clamping portions are on the same straight line.

Preferably, a positioning boss is arranged on the side face, close to the other clamping block, of the clamping block, a positioning block is arranged on the upper portion of the positioning boss, and the PCB is arranged on the positioning boss.

The preferred, the assembly of turning over a roll over still includes location portion, location portion includes locating plate, location slider, location guide rail and location cylinder, the location cylinder with the location guide rail is all fixed to be set up in the removal portion, the flexible direction of telescopic link of location cylinder with the extending direction of location guide rail is unanimous, the location slider slides and sets up on the location guide rail, the locating plate is fixed to be set up on the location slider, the flexible direction perpendicular to of telescopic link of location cylinder the fixed plate, the locating plate sets up two between the grip block, be provided with the confession on the fixed plate the clearing hole that the locating plate passed.

Preferably, the fixed component comprises a screen carrying platform, a fixed part and a limiting part, the screen is arranged on the screen carrying platform and passes through the fixed position of the fixed part, and the limiting part is arranged corresponding to the flexible connecting band between the PCB and the screen.

Preferably, the two fixing parts are symmetrically arranged on two sides of the screen carrying table, each fixing part comprises a rotary compression cylinder and a compression rod, one end of each compression rod is fixedly connected with a telescopic rod of the rotary compression cylinder, the other end of each compression rod is provided with a compression block, and the compression blocks are made of rubber materials.

The preferred, spacing portion includes revolving cylinder, regulating plate and gag lever post, revolving cylinder is fixed to be set up carry screen platform bottom, revolving cylinder's output pole passes through the regulating plate with the gag lever post is connected, the regulating plate with the gag lever post sets up perpendicularly, the gag lever post sets up carry the screen platform to keep away from one side of rotary platform.

Compared with the prior art, the invention has the beneficial effects that: the automatic screw mounting device adopts an automatic assembly line, adopts automatic operation of turning, reverse folding and screw mounting, has high production efficiency, greatly improves the screw mounting accuracy and reduces the error rate.

Drawings

FIG. 1 is a structural view of the screw machine;

FIG. 2 is a structural view of the rotary platform;

FIG. 3 is a view of the mating structure of the invagination assembly and the fixation assembly;

FIG. 4 is a structural view of the invagination assembly;

FIG. 5 is a structural view of the clamping block;

FIG. 6 is a structural view of the fixing assembly;

FIG. 7 is a perspective view of the flip assembly;

fig. 8 is a structural side view of the flip assembly.

The figures in the drawings represent:

1-a flip assembly; 2-a rotating platform; 3-a reverse folding assembly; 4-a fixation assembly; 5-a feeding manipulator; 6-screw manipulator; 7-screen; 8-a PCB board; 11-a connecting seat; 12-a turning motor; 13-a fixed base; 14-a first screen support assembly; 15-a first PCB support assembly; 16-a regulating cylinder; 17-adjusting the guide rod; 18-a second screen support assembly; 19-a support plate; 110-PFB vacuum chuck; 111-screen vacuum chuck; 21-rotating plate; 22-positioning the CCD; 31-a moving part; 32-a rotating part; 33-a clamping portion; 34-a positioning section; 41-screen carrying platform; 42-a fixed part; 43-a limiting part; 311-a first movement module; 312-a second movement module; 313-a third movement module; 321-a fixing frame; 322-a rotating frame; 323-rotating electrical machines; 331-a clamping block; 332-clamping the rail; 411-an adsorption head; 421-rotating a compaction cylinder; 422-a pressing rod; 431-a rotary cylinder; 432-an adjusting plate; 433-a limiting rod; 3311-positioning boss; 3312-location block.

Detailed Description

The above and further features and advantages of the present invention are described in more detail below with reference to the accompanying drawings.

Example one

As shown in fig. 1, fig. 1 is a structural view of the screw machine. The screw machine comprises a turning component 1, a rotating platform 2 and a reverse folding component 3, wherein a rotating shaft is fixedly connected to the center of the rotating platform 2, a plurality of fixing components 4 are annularly and uniformly distributed on the rotating platform 2 by taking the rotating shaft as a center, a servo motor drives the rotating shaft to rotate, the rotating platform 2 is correspondingly provided with a feeding station and a screw station, a feeding manipulator 5 and a plurality of screw manipulators 6 are arranged on the periphery of the rotating platform 2, the reverse folding component 3 is arranged corresponding to the fixing components 4 positioned on the feeding station, each screw manipulator 6 is arranged corresponding to the fixing component 4 positioned on the screw station one by one, the reverse folding component 3 is arranged corresponding to the feeding manipulator 5, the feeding manipulator 5 is arranged between the turning component 1 and the reverse folding component 3, the turning component 1 turns over incoming materials to ensure that the back of a screen 7 faces upwards, reverse folding subassembly 3 with be located the material loading station fixed subassembly 4 combination sets up, is located the material loading station fixed subassembly 4 is fixed screen 7, reverse folding subassembly 3 centre gripping and reverse folding PCB board 8 to carry out the overlapping counterpoint operation between PCB board 8 and the screen 7, accomplish after overlapping rotary platform 2 rotates in order to with PCB board 8 after overlapping and screen 7 in proper order through each the screw station by screw manipulator 6 carries out the automatic installation of each hole site screw.

The automatic screw mounting device adopts an automatic assembly line, adopts automatic operation of turning, reverse folding and screw mounting, has high production efficiency, greatly improves the screw mounting accuracy and reduces the error rate.

Example two

As shown in fig. 2, fig. 2 is a structural view of the rotating platform; in this embodiment, the rotating platform 2 includes a rotating plate 21, the rotating plate 21 is rectangular, an end of the rotating shaft is fixedly disposed on the rotating plate 21, the four fixing assemblies 4 are respectively disposed corresponding to four sides of the rotating plate 21, and a right angle of the rotating plate 21 is disposed in a fillet transition manner, so as to avoid interference with other devices during the rotation of the rotating plate 21.

Preferably, the rotating plate 21 is provided with a plurality of lightening holes to reduce the overall weight of the rotating platform 2, so as to facilitate the rotation of the rotating plate 21.

Specifically, four fixed components 4 are arranged clockwise on the rotary platform 2, a feeding manipulator 5, a first screw manipulator, a second screw manipulator and a third screw manipulator are arranged clockwise on the periphery of the rotary plate 21 and in one-to-one correspondence with the fixed components 4, the rotary plate 21 is provided with a positioning CCD22 corresponding to the first fixed component 4, and the feeding manipulator 5 is guaranteed to be accurately placed on the fixed components 4 at corresponding positions by the feeding manipulator 5 through the positioning CCD22, and the first screw manipulator, the second screw manipulator and the third screw manipulator respectively perform screwing operation on products moved to corresponding positions.

Preferably, the third screw manipulator is provided with a grabbing sucker, and grabbing and blanking operations of products are achieved through the grabbing sucker.

With the multistation with rotary platform 2 is in as center equipartition rotary platform 2 is last, through rotary platform 2 rotate and realize one the removal in order of sequence of fixed subassembly 4 goes up the product can correspond according to the quantity of actual mounting bolt and set up station quantity, rotates fixed angle through servo motor simultaneously, can realize the accurate location of multistation, has avoided positioner's extra setting, also can carry out assembly line processing to many products simultaneously.

EXAMPLE III

As shown in fig. 3, fig. 3 is a view of the mating structure of the invagination assembly and the fixing assembly; the reverse folding assembly 3 comprises a moving part 31, a rotating part 32 and a clamping part 33, wherein the rotating part 32 is arranged on the moving part 31, the clamping part 33 is arranged on the rotating part 32, the PCB 8 is fixed on the rotating part 32 by the clamping part 33, and the rotating part 32 drives the PCB 8 to be arranged above the screen 7 on the fixing assembly 4 in a turnover manner; fixed subassembly 4 is in including carrying screen platform 41, fixed part 42 and spacing portion 43, screen 7 sets up carry on screen platform 41 and pass through fixed part 42 fixed position, spacing portion 43 is used for restricting the flexonics area position that PCB board 8 and screen 7 are connected, avoids causing the damage by the centre gripping between PCB board 8 and screen 7 when PCB board 8 overlaps with screen 7.

Through setting up reverse roll over subassembly 3 and carry out the centre gripping upset to PCB board 8, through the position of fixed screen 7 of fixed subassembly 4 to realize overlapping of PCB board 8 and screen 7 carry out the regulation of PCB board 8 and screen 7 relative position under the effect of removal portion 31, guarantee that counterpoint of PCB board 8 and screen 7 is accurate, in order to improve production efficiency through full automatization's mode, reduce the dislocation rate.

Generally, the moving portion 31 includes a first moving module 311, a second moving module 312, and a third moving module 313, the second moving module 312 is disposed on the first moving module 311, the third moving module 313 is disposed on the second moving module 312, the rotating portion 32 is disposed on the third moving module 313, the rotating portion 32 drives the PCB board 8 to turn over and dispose above the screen 7, the third moving module 313 drives the rotating portion 32 to perform position adjustment in the vertical direction, and the first moving module 311 and the second moving module 312 drive the rotating portion 32 to perform movement in the horizontal direction.

Generally, the first moving module 311, the second moving module 312, and the third moving module 313 all adopt linear modules that are conventional in the prior art to realize corresponding linear movement.

Preferably, the moving direction of the first moving module 311 driving the second moving module 312 and the moving direction of the second moving module 312 driving the third moving module 313 are perpendicular to each other.

Example four

As shown in fig. 4, fig. 4 is a structural view of the invagination assembly; the rotating portion 32 includes a fixed frame 321, a rotating frame 322 and a rotating motor 323, the fixed frame 321 is fixedly disposed on the sliding block of the moving portion 31, two ends of the rotating frame 322 are movably connected to the fixed frame 321 through a rotating base, the rotating motor 323 is fixedly disposed on the fixed frame 321, an output shaft of the rotating motor 323 is fixedly connected to the rotating base, and the rotating frame 322 can be driven to rotate through the rotating motor 323.

The fixing frame 321 and the rotating frame 322 are both U-shaped.

Specifically, the fixing frame 321 includes a fixing plate and two first connecting plates symmetrically disposed at two ends of the fixing plate, the rotating frame 322 includes a rotating plate 21 and two second connecting plates symmetrically disposed at two ends of the rotating plate 21, the two second connecting plates are respectively fixedly connected to the two rotating seats, the fixing plate and the rotating plate 21 are arranged in parallel, a rotating hole is disposed on the first connecting plate, the two rotating holes are coaxially disposed, a rotating shaft is disposed in the rotating hole, the rotating shaft is fixedly disposed on one rotating seat, an output shaft of the rotating motor 323 is disposed in the other rotating hole, and the output shaft of the rotating motor 323 is fixedly connected to the other rotating seat, so that the fixing frame 321 and the rotating frame 322 rotate relatively.

The clamping portion 33 comprises two symmetrically arranged clamping modules, the two clamping modules are arranged on the rotating plate 21, the clamping portion 33 comprises clamping blocks 331, clamping guide rails 332, clamping sliders and clamping cylinders, the clamping cylinders and the clamping guide rails 332 are fixedly arranged on the rotating plate 21, the telescopic rod of each clamping cylinder extends in the same direction as the extending direction of the corresponding clamping guide rail 332, the clamping sliders are slidably arranged on the clamping guide rails 332, the clamping blocks 331 are fixedly arranged on the clamping sliders, the extending directions of the clamping guide rails 332 on the two clamping portions 33 are on the same straight line, and the PCB 8 between the two clamping blocks 331 can be clamped and fixed by adjusting the position between the two clamping blocks 331.

As shown in fig. 5, fig. 5 is a structural view of the clamping block; generally, a positioning boss 3311 is disposed on a side surface of the clamping block 331 close to another clamping block 331, a positioning block 3312 is disposed on an upper portion of the positioning boss 3311, the PCB board 8 is disposed on the positioning boss 3311, the positioning block 3312 is used for limiting movement of the PCB board 8 in a vertical direction, and after the rotation of the rotating frame 322 is completed, the positioning block 3312 supports the PCB board 8 at the bottom.

EXAMPLE five

The reverse-folding component 3 further comprises a positioning portion 34, the positioning portion 34 comprises a positioning plate, a positioning sliding block, a positioning guide rail and a positioning air cylinder, the positioning air cylinder and the positioning guide rail are fixedly arranged on the second moving module 312, the telescopic rod of the positioning air cylinder extends in the same direction as the extending direction of the positioning guide rail, the positioning sliding block is slidably arranged on the positioning guide rail, the positioning plate is fixedly arranged on the positioning sliding block, the telescopic rod of the positioning air cylinder extends in the direction perpendicular to the fixing plate, the positioning plate is arranged between the clamping blocks 331, and a through hole for the positioning plate to pass through is formed in the fixing plate.

Before the centre gripping subassembly carries out the centre gripping to PCB board 8, through the locating plate is fixed a position PCB board 8's front edge, and rethread two grip block 331 carries out the centre gripping location to PCB board 8's both edges to the realization is to the trilateral location of PCB board 8, in order to improve the centre gripping location effect of centre gripping subassembly further improves PCB board 8 and screen 7's counterpoint operation precision.

EXAMPLE six

FIG. 6 is a structural view of the fixing assembly, as shown in FIG. 6; two fixed part 42 symmetry sets up carry the both sides of screen platform 41, fixed part 42 includes rotatory cylinder 421 and the compression bar 422 that compresses tightly, the one end of compression bar 422 with rotatory telescopic link fixed connection who compresses tightly cylinder 421, the other end is provided with the compact heap, the compact heap generally adopts the rubber material, with carry on the flexible contact with carry screen 7 on the screen platform 41.

Spacing portion 43 includes revolving cylinder 431, regulating plate 432 and gag lever post 433, revolving cylinder 431 is fixed to be set up carry screen platform 41 bottom, revolving cylinder 431's output pole passes through regulating plate 432 with gag lever post 433 is connected, regulating plate 432 with gag lever post 433 sets up perpendicularly, through revolving cylinder 431 drives regulating plate 432's rotation, thereby realizes gag lever post 433 is in the switching of vertical state and horizontality, gag lever post 433 sets up carry screen platform 41 to be close to one side of reverse-folding subassembly 3.

Generally, be provided with the regulation hole on the regulating plate 432, the tip of gag lever post 433 pass through adjusting bolt with regulation hole fixed connection, the regulation hole sets up to waist type hole to can change the regulation to specific operating conditions the position of gag lever post 433.

Generally, the screen-loading platform 41 is provided with an adsorption head 411 to stabilize the position of the screen 7 on the screen-loading platform 41, and avoid inaccurate alignment caused by driving the position of the screen 7 during operations such as folding.

EXAMPLE seven

As shown in fig. 7 and 8, fig. 7 is a perspective structural view of the turnover assembly; FIG. 8 is a structural side view of the flip assembly; upset subassembly 1 includes first supporting part, second supporting part, first supporting part with the second supporting part passes through connecting seat 11 and rotates the connection, first supporting part includes unable adjustment base 13, adjusting part, first screen supporting component 14 and first PCB supporting component 15, unable adjustment base 13 passes through adjusting part with first screen supporting component 14 is connected, adjusting part takes first screen supporting component 14 is vertical reciprocates, first PCB supporting component 15 sets up on unable adjustment base 13, unable adjustment base 13 passes through connecting seat 11 with the second supporting part is connected, be provided with on connecting seat 11 and be used for rotating the upset motor 12 of second supporting part.

Preferably, the adjusting assembly includes an adjusting cylinder 16 and a plurality of adjusting guide rods 17, the first screen supporting assembly 14 includes a material receiving plate, the adjusting cylinder 16 is fixedly disposed on the fixing base 13, an expansion rod of the adjusting cylinder 16 is fixedly connected with the material receiving plate, the adjusting guide rods 17 are vertically fixed at the bottom of the material receiving plate, guide holes are formed in the fixing base 13 corresponding to the adjusting guide rods 17, and the adjusting guide rods 17 are disposed in the guide holes in a one-to-one correspondence manner.

Generally, the first PCB support assembly 15 includes a plurality of PCB support pillars, the PCB support pillars are vertically connected to the material receiving plate, and the PCB support pillars are disposed on one side of the material receiving plate away from the connecting seat 11.

The connecting seat 11 includes two first connecting plates and two second connecting plates that the symmetry set up, first connecting plate is fixed to be set up on unable adjustment base 13, the second connecting plate with second supporting part fixed connection, the rotating electrical machines 323 is fixed to be set up on the first connecting plate, first connecting plate with the second connecting plate one-to-one is connected, be provided with rotatory hole on the first connecting plate, two rotatory coaxial the setting in hole, one be provided with the pivot in the rotatory downthehole, the pivot is fixed to be set up one on the second connecting plate, another be provided with in the rotatory downthehole output shaft of upset motor 12, the output shaft and another of rotating electrical machines 323 second connecting plate fixed connection.

The height of the first screen supporting component 14 is adjusted through the adjusting component, after the second supporting part is driven by the overturning motor 12 to overturn in place, the first screen supporting component 14 is moved upwards to a reasonable height to receive the screen 7, collision is avoided when the first supporting part and the second supporting part are used for product transfer, and meanwhile, the lifting height of the first screen supporting component 14 is adjusted to enable the invention to be suitable for products with different thicknesses.

Example eight

The second supporting portion comprises a second screen supporting component 18 and a second PCB supporting component, the second screen supporting component 18 is arranged as a feeding plate, the feeding plate is connected with the connecting seat 11, and the second PCB supporting component is arranged on one side, away from the connecting seat 11, of the feeding plate.

The second PCB support assembly comprises a support plate 19 and a PFB vacuum chuck 110, the support plate 19 is L-shaped and is fixedly disposed on a side wall of the feeding plate, and the PFB vacuum chuck 110 is fixedly connected with the feeding plate through a connecting rod.

Preferably, the support plate 19 is provided with at least 2 support plates, which ensure the middle support of the PCB board 8.

The number of the PFB vacuum chucks 110 is at least 2, the supporting plate 19 is disposed between the two PFB vacuum chucks 110, and the PFB vacuum chucks 110 are correspondingly disposed at the farthest end of the supporting plate 19 away from the feeding plate, so as to ensure that the PFB vacuum chucks 110 support the edge of the PCB board 8 in an adsorption manner.

Go up the flitch with all be provided with a plurality of screens vacuum chuck 111 on the flitch connects for adsorb fixedly to screen 7.

The contact surface of the supporting plate 19 and the PCB board 8 and the adsorption surface of the PFB vacuum chuck 110 and the PCB board 8 are not higher than the contact surface of the feeding plate and the screen 7.

The foregoing is merely a preferred embodiment of the invention, which is intended to be illustrative and not limiting. It will be understood by those skilled in the art that various changes, modifications and equivalents may be made therein without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. The utility model provides a screw machine, its characterized in that, includes upset subassembly, rotary platform and the subassembly of turning over, rotary platform center fixedly connected with rotation axis, a plurality of fixed subassemblies with the rotation axis is central annular equipartition and is in on the rotary platform, servo motor drives the rotation axis rotates, rotary platform corresponds and is provided with material loading station and screw station, and material loading manipulator and a plurality of screw manipulator set up rotary platform's periphery, just the subassembly correspondence of turning over is located the material loading station fixed subassembly sets up, each screw manipulator with be located the screw station fixed subassembly one-to-one sets up, the subassembly of turning over with material loading manipulator corresponds the setting, material loading manipulator sets up the upset subassembly with between the subassembly of turning over.

2. The screwing machine of claim 1, wherein the reverse-folding assembly comprises a moving portion, a rotating portion and a clamping portion, the rotating portion is disposed on the moving portion, the clamping portion is disposed on the rotating portion, the clamping portion fixes the PCB board on the rotating portion, and the rotating portion drives the PCB board to turn over and be disposed above a screen on the fixing assembly.

3. The screwing machine according to claim 2, wherein the rotating part includes a fixed mount, a rotating mount and a rotating motor, the fixed mount is fixedly disposed on the sliding block of the moving part, two ends of the rotating mount are movably connected to the fixed mount through a rotating base, the rotating motor is fixedly disposed on the fixed mount, and an output shaft of the rotating motor is fixedly connected to one of the rotating bases.

4. The screwing machine as claimed in claim 3, wherein said fixed frame includes a fixed plate and two first connecting plates symmetrically disposed at two ends of said fixed plate, said rotary frame includes a rotary plate and two second connecting plates symmetrically disposed at two ends of said rotary plate, said two second connecting plates are respectively and fixedly connected to two said rotary seats, said fixed plate and said rotary plate are disposed in parallel, said first connecting plates are provided with rotary holes, said two rotary holes are coaxially disposed, a rotary shaft is disposed in one of said rotary holes, said rotary shaft is fixedly disposed on one of said rotary seats, an output shaft of said rotary motor is disposed in the other of said rotary holes, and said output shaft of said rotary motor is fixedly connected to the other of said rotary seats.

5. The screw machine according to claim 4, wherein the clamping portion includes two symmetrically disposed clamping modules, both of the clamping modules are disposed on the rotating plate, the clamping portion includes a clamping block, a clamping rail, a clamping slider and a clamping cylinder, both of the clamping cylinder and the clamping rail are fixedly disposed on the rotating plate, a telescopic rod of the clamping cylinder extends in a direction consistent with an extending direction of the clamping rail, the clamping slider is slidably disposed on the clamping rail, the clamping block is fixedly disposed on the clamping slider, and the extending directions of the clamping rails on both of the clamping portions are on the same straight line.

6. The screw machine according to claim 5, wherein a positioning boss is arranged on a side surface of the clamping block close to the other clamping block, a positioning block is arranged on the upper portion of the positioning boss, and the PCB is arranged on the positioning boss.

7. The screw machine according to claim 2, wherein the reverse-folding assembly further comprises a positioning portion, the positioning portion comprises a positioning plate, a positioning slider, a positioning guide rail and a positioning cylinder, the positioning cylinder and the positioning guide rail are both fixedly arranged on the moving portion, the telescopic rod of the positioning cylinder extends in the same direction as the extending direction of the positioning guide rail, the positioning slider is slidably arranged on the positioning guide rail, the positioning plate is fixedly arranged on the positioning slider, the telescopic rod of the positioning cylinder extends in a direction perpendicular to the fixing plate, the positioning plate is arranged between the two clamping blocks, and a through hole for the positioning plate to pass through is formed in the fixing plate.

8. The screw machine of claim 1, wherein the fixing assembly comprises a screen carrying table, a fixing portion and a limiting portion, the screen is arranged on the screen carrying table and fixed in position through the fixing portion, and the limiting portion is arranged corresponding to the flexible connecting band between the PCB and the screen.

9. The screw machine according to claim 8, wherein the two fixing portions are symmetrically disposed on two sides of the screen-loading platform, the fixing portions include a rotary pressing cylinder and a pressing rod, one end of the pressing rod is fixedly connected to a telescopic rod of the rotary pressing cylinder, the other end of the pressing rod is provided with a pressing block, and the pressing block is made of rubber.

10. The screw machine according to claim 9, wherein the limiting portion comprises a rotary cylinder, an adjusting plate and a limiting rod, the rotary cylinder is fixedly arranged at the bottom of the screen-carrying platform, an output rod of the rotary cylinder is connected with the limiting rod through the adjusting plate, the adjusting plate is arranged perpendicular to the limiting rod, and the limiting rod is arranged at one side of the screen-carrying platform far away from the rotary platform.