Control system for screw tightening device

Abstract

A control system for a screw tightening device, the control system cooperatively controls the actions of a feeding system and a tightening system to improve the continuous stability of screw feeding. The feeding system controls a screw feeding device (1) to continuously feed screws one by one to a gun head (2); the tightening system controls the gun head to continuously screw the screws; a screening vibration feeding mechanism (17) vibrates; a discharging mechanism (15) acts to open a discharging port; the screws fall into a small hopper (19); two-stage lifting devices (18) lift the screws onto the screening vibration feeding mechanism, and the screws enter a cutting mechanism (16) by means of the screening vibration feeding mechanism; and the cutting mechanism feeds the screws one by one into a screw supply device (22), a preloading cylinder (29) drives an anti-floating engagement device (23) to move along a preloading rail, such that the screws are aligned with a pressure nozzle (237), a main loading cylinder (27) drives an engagement linkage device to move, such that a tightening guide rod sleeve (233) moves and presses against a screw cap, a servo electric motor (281) drives the tightening guide rod sleeve to rotate, the main loading cylinder keeps the tightening guide rod sleeve pressed against the screw cap, a gripper cylinder (238) drives a screw gripper (236) to open, and each screw is disengaged from the screw gripper and then completely screwed into place. The control system can be widely used in the field of automatic screwing apparatuses.

Description

A control system for a screw tightening device Technical Field

[0001] This invention relates to a control system for a screw tightening device, belonging to the technical field of automatic screw-driving equipment. Background Technology

[0002] Automatic screw-driving equipment mainly consists of a feeding system and a tightening system. The feeding system, also known as a screw arranging machine or screw supply machine, is a relatively simple device that arranges screws in a row. The tightening system is an automated device that replaces manual labor to pick up, place, and tighten screws. Both are small automated devices designed to improve work efficiency and are widely used in the electronics industry.

[0003] Currently, vibratory feeding mechanisms, such as vibratory hoppers, are generally used to supply screws. However, vibratory feeding mechanisms are bulky and prone to jamming during the feeding process, which affects the continuous feeding and can damage the screw coating. In addition, existing tightening systems have the problem of excessive active torque. How to improve the continuous stability of screw feeding, effectively protect the coating, and coordinate the actions of the feeding system and the tightening system has always been the focus of research for those skilled in the art. Summary of the Invention

[0004] This invention overcomes the shortcomings of existing technologies and provides a control system for a screw tightening device. It coordinates the operation of the feeding system and the tightening system, improves the continuous stability of screw feeding, effectively protects the screw coating, shortens the active torque, makes the structure more compact, and further improves the nailing efficiency.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows: a control system for a screw tightening device, including a feeding system and a tightening system. The feeding system controls the screw feeding device to continuously feed screws one by one to the gun head, and the tightening system controls the gun head to continuously tighten screws. The two work together to avoid screw accumulation at the gun head.

[0006] The feeding system controls the nail feeding device to perform the following actions: after the screws are poured into the large hopper, the screening vibration feeding mechanism is controlled to vibrate, and the screws enter the discharge port of the large hopper from the gap between the large hopper and the large hopper baffle. Then, the discharge mechanism is controlled to open the discharge port, and the screws fall into the small hopper. The two-stage lifting device is controlled to lift the screws onto the screening vibration feeding mechanism, and they enter the cutting mechanism through the screening vibration feeding mechanism. Then, the cutting mechanism is controlled to send them one by one to the tightening system.

[0007] The tightening system controls the gun head to perform the following actions: screws fall one by one from the feeding device into the feeding device, which is a tubular structure. The screws cannot be rotated inside and can only fall in one direction. After passing through the base plate feeding tube, the inclined guide tube, and the swing feeding tube, the screws enter the anti-floating engagement device. The pre-pressure cylinder drives the anti-floating engagement device to move along the pre-pressure track, aligning the screw with the pressure nozzle. Then, the main pressure cylinder drives the engagement linkage device to move and press the tightening guide sleeve against the screw cap. At the same time, the servo motor is started to drive the tightening guide sleeve to rotate, while the main pressure cylinder keeps the tightening guide sleeve pressing against the screw cap. Simultaneously, the gripper cylinder is started to drive the screw gripper to open, and the screw is disengaged from the screw gripper and fully tightened into place. Then, each cylinder resets, ready for the tightening of the next screw.

[0008] Furthermore, the structure of the nail feeding device includes a base, a large hopper support, and a large hopper. The large hopper is fixed to the base via the large hopper support. The large hopper support has a plate-like structure, and multiple large hopper support bases are arranged around the large hopper. The upper end of the large hopper support is fixedly connected to the outer side of the large hopper, and the lower end of the large hopper support is fixedly disposed on the upper side of the base. A large hopper baffle is provided on the inner side of the large hopper. One side of the large hopper baffle is fixedly disposed on the inner side wall of the large hopper, and the large hopper baffle is arranged around the discharge port of the large hopper, maintaining a certain distance from the discharge port. The large hopper has a discharge mechanism at its discharge port, which is used to open and close the discharge port of the large hopper. A small hopper is located below the discharge mechanism. The small hopper is fixedly mounted on the upper side of the base by a two-stage lifting device. The lower end of the two-stage lifting device is fixed to the base. The lifting part located at the upper end of the two-stage lifting device passes through the small hopper and extends above it. The lifting part of the two-stage lifting device is connected to the screening vibration feeding mechanism. The inlet of the screening vibration feeding mechanism is aligned with the outlet end of the lifting part of the two-stage lifting device. The outlet of the screening vibration feeding mechanism is aligned with the inlet of the cutting mechanism.

[0009] Furthermore, the structure of the feeding mechanism includes a feeding cylinder, a feeding plate, a supporting rib, a feeding support, and a feeding port. The upper end of the feeding support is fixedly installed on the outer side of the bottom of the large hopper, and the lower end of the feeding support is fixedly installed on the upper side of the base. The supporting rib is horizontally installed below the feeding port of the large hopper. One end of the supporting rib is fixedly installed on the feeding support, and the other end of the supporting rib is fixedly installed with the feeding cylinder. The cylinder body of the feeding cylinder is fixed to the supporting rib. On the plate, a discharge plate is fixedly installed on the piston rod of the discharge cylinder; the upper end of the discharge port is movably installed on the support rib plate, and the position of the discharge port is adjusted so that it can be aligned with the discharge port of the large hopper, and the upper end of the discharge port is in close contact with the discharge port of the large hopper, and the lower end of the discharge port is located below the support rib plate. The discharge port is provided with an insertion hole for the discharge plate to pass through horizontally. Under the drive of the discharge cylinder, the discharge plate can match and pass through the discharge port to block or open the discharge port of the large hopper.

[0010] Furthermore, the structure of the two-stage lifting device includes a lifting cylinder, a first lifting device base plate, a first lifting cutting plate, a second lifting device base plate, a second lifting cutting plate, a lifting device support, and a cutting connecting plate. The lower end of the lifting device support is fixedly mounted on the upper side of the base. The first and second lifting device base plates are vertically spaced and fixedly mounted on the lifting device support. The first lifting cutting plate is movably matched between the first and second lifting device base plates. The second lifting cutting plate is movably mounted outside the second lifting device base plate. A lifting cylinder is fixedly mounted on the outer side of the first lifting device base plate. The lower ends of both the first and second lifting cutting plates are fixedly mounted on the cutting connecting plate. One end of the cutting connecting plate is connected to the piston rod of the lifting cylinder, and the first and second lifting cutting plates are driven to move up and down reciprocally by the lifting cylinder. The upper ends of the first lifting device base plate, the first lifting cutting plate, the second lifting device base plate, and the second lifting cutting plate are all provided with inclined surfaces in the same direction, which are inclined downwards towards the screening vibration feeding mechanism.

[0011] Further, the structure of the screening vibration feeding mechanism includes: a vibrator, a vibration feeding mechanism base anti-vibration column, a vibration feeding mechanism base, a vibration feeding mechanism fixing plate, a contour feeding channel, an air blowing fixing block, a material distribution and nail receiving plate pad, a material distribution and nail receiving plate, a screw height limiting plate pad, a screw height limiting plate support, a screw height limiting plate, a screw presence / absence sensor bracket, and a screw presence / absence sensor. The vibration feeding mechanism base is fixedly mounted on the upper side of the base via the vibration feeding mechanism base anti-vibration column. The vibrator is fixedly mounted on the upper side of the vibration feeding mechanism base. A vibration feeding mechanism fixing plate is fixedly mounted on the upper side of the vibrator. A contour feeding channel is fixed to one end of the upper side of the vibration feeding mechanism fixing plate. The contour feeding channel is aligned with the discharge end of the lifting part of the two-stage lifting device. A discharge groove is provided on the vibration feeding mechanism fixing plate on the discharge port side of the contour feeding channel. The trough and the contouring channel are arranged in the same direction. A material distribution and receiving plate pad is provided on the vibrating feeding mechanism fixing plate on both sides of the discharge trough. A material distribution and receiving plate is provided on each of the material distribution and receiving plate pads. A screw height limiting plate pad is also provided on the upper side of the vibrating feeding mechanism fixing plate. A screw height limiting plate support is provided on the screw height limiting plate pad. The screw height limiting plate support is horizontally positioned above the material distribution and receiving plate. A screw height limiting plate is provided at the end of the screw height limiting plate support. The screw height limiting plate is located directly above the discharge trough and is arranged along the direction of the discharge trough. A screw presence / absence sensor is fixedly mounted on the vibrating feeding mechanism fixing plate via a screw presence / absence sensor bracket. The detection end of the screw presence / absence sensor extends into the space between the material distribution and receiving plates above the discharge trough. An air-blowing fixing block is provided between the material distribution and receiving plates and the contouring channel.

[0012] Furthermore, the cutting mechanism is fixedly mounted on the screening vibration feeding mechanism. The structure of the cutting mechanism includes a cutting cylinder, a cutting cylinder mounting base, a cutting slider pressure plate, a lower nail guide plate, a lower nail opening, and a connecting base plate. The connecting base plate is fixedly mounted on the screening vibration feeding mechanism. The cylinder body of the cutting cylinder is connected and fixed to the connecting base plate via the cutting slider pressure plate. The piston rod of the cutting cylinder is connected to the cutting cylinder mounting base. The cutting cylinder mounting base has a groove with a screw outline on the side facing the screening vibration feeding mechanism. The bottom of the cutting cylinder mounting base has a lower nail guide plate. The cutting cylinder mounting base can move relative to the lower nail guide plate under the drive of the cutting cylinder. The lower nail guide plate has a lower nail opening on its lower side. The outer side of the slide is provided with a slide side connecting plate, a slide side support plate, a bottom plate sealing plate, an upper end clamping plate, a slide bottom plate, and a cutting plate. The slide side connecting plate, slide side support plate, bottom plate sealing plate, upper end clamping plate, slide bottom plate, and cutting plate are connected and fixed to form a cavity. The cutting cylinder fixing seat is slidably disposed in the cavity. The piston rod of the cutting cylinder is connected to the slide side connecting plate. The cutting cylinder fixing seat can be relatively displaced within the cavity. The cutting cylinder fixing seat is provided with guide structures for displacement guidance on the sides of the slide bottom plate and the bottom plate sealing plate. The outer side of the upper end clamping plate and the cutting plate is provided with a material shielding plate rib. The material shielding plate rib is fixedly disposed on the connecting bottom plate. The material shielding plate rib is provided with a notch for screws to pass through.

[0013] Furthermore, the structure of the gun head includes a frame, a nail feeding device, an anti-floating engagement device, a main pressure rail, an engagement linkage device, a tightening guide rod, a main pressure cylinder, a torque drive device, a pre-pressure cylinder, and a pre-pressure rail. The nail feeding device is mounted on the frame, and its inlet is connected to the nail feeding device. The outlet of the nail feeding device is equipped with an anti-floating engagement device. The anti-floating engagement device is mounted on the frame via the pre-pressure rail. The power input end of the anti-floating engagement device is equipped with a pre-pressure cylinder, which drives the anti-floating engagement device to slide back and forth on the pre-pressure rail.

[0014] The main pressure rail is longitudinally fixed on the frame, and the meshing linkage device is slidably mounted on the main pressure rail. One bottom end of the meshing linkage device is connected to the piston rod of the main pressure cylinder fixed on the frame. The main pressure cylinder drives the meshing linkage device to slide back and forth along the main pressure rail. One top end of the meshing linkage device is poweredly connected to the torque drive device. The other top end of the meshing linkage device is inserted into the anti-floating meshing device through a tightening guide rod and can be matched and engaged with the screw that enters the anti-floating meshing device. The torque drive device drives the tightening guide rod to rotate and tighten the screw.

[0015] Further, the structure of the anti-floating engagement device includes: an engagement device fixing seat, an engagement device support plate, a tightening guide rod sleeve, an actuating arm, a guide rod slider, a screw gripper, a pressure nozzle, a gripper cylinder, and a nail clamp control finger. The engagement device fixing seat has engagement device support plates fixedly installed on both sides of one end. The tightening guide rod sleeve is installed at the ends of the two engagement device support plates. A pressure nozzle is installed at the end of the tightening guide rod sleeve. The guide rod slider is slidably mounted on the tightening guide rod sleeve. Actuating arms are installed on both sides of the guide rod slider. A screw gripper is installed at the front end of each actuating arm. The gripper cylinder is installed on the engagement device fixing seat. A nail clamp control finger is connected to the piston rod of the gripper cylinder. The nail clamp control finger can push the guide rod slider to move under the operation of the gripper cylinder. The engagement device mounting base is mounted on the engagement device base plate, which is slidably mounted on the preload track. The engagement device base plate is connected to the piston rod of the preload cylinder. A nail feeding tube is installed through the engagement device mounting base. One end of the nail feeding tube is connected to the nail supply device, and the other end is connected to an inclined nail guide tube. The end of the inclined nail guide tube is connected to a swing nail feeding tube, and the end of the swing nail feeding tube is connected to the inner tube of the tightening guide rod sleeve. A displacement sensor bracket is installed on the side of the engagement device mounting base. The displacement sensor bracket is installed close to the side plate of the frame, and a displacement sensor is installed on the displacement sensor bracket. A proximity switch mounting plate is installed on the engagement device mounting base, and a proximity switch is installed on the proximity switch mounting plate.

[0016] Furthermore, the structure of the torque drive device includes a servo motor, a rotary support shaft, a base plate, a spline, a main pulley, a synchronous belt, and a small pulley. The body of the servo motor is fixed to the cylinder body of the main pressure cylinder via the base plate. The power output end of the servo motor is provided with a main pulley. The rotary support shaft is movably mounted on the base plate and has a small pulley. The main pulley and the small pulley are connected by a synchronous belt. The end of the rotary support shaft is provided with a spline and is connected to a meshing linkage device via the spline.

[0017] The advantages of this invention compared to existing technologies are as follows: This invention coordinates the operation of the feeding system and the tightening system, improving the continuous stability of screw feeding, effectively protecting the screw coating, shortening the active torque, resulting in a more compact structure and further improving nailing efficiency. By setting a baffle plate inside the large hopper, the screw feeding speed is slowed down, preventing screws from accumulating and blocking the hopper's discharge port. After the screws are lifted onto the screening vibrating feeding mechanism, the contoured feeding channel and the air-blowing fixing block work together to ensure the screw heads enter the discharge groove on the vibrating feeding mechanism's fixing plate with the screw heads facing upwards. The subsequent vibration sequentially enters the cutting cylinder fixing seat of the cutting mechanism. Under the action of the cutting cylinder, it pushes the shell formed by the cooperation of the slide side connecting plate, slide side support plate, bottom plate sealing plate, upper end bayonet plate, slide bottom plate and cutting plate. The movement of this shell drives the internal cutting cylinder fixing seat to move. During the movement, the screw in the cutting cylinder fixing seat aligns with the lower nail guide plate and falls, then enters the nail feeding channel from the lower nail opening. The nail feeding process of this invention is smooth and less prone to nail jamming, greatly improving the stability of the feeding, increasing the nail feeding efficiency, and effectively protecting the coating. By integrating the anti-floating engagement device and the engagement linkage device, and passing the nail feeding device through it, the smoothness of screw feeding is not affected. Moreover, the pre-pressure cylinder is used to pre-press and tighten, ensuring that the screw is upright and tightened, ensuring the accuracy of subsequent tightening. The servo motor and main pressure cylinder ensure that continuous pressure is maintained during tightening, ensuring that the screw is tightened smoothly, greatly shortening the active torque, and making the overall structure more compact. Attached Figure Description

[0018] The present invention will now be further described with reference to the accompanying drawings.

[0019] Figure 1 is a schematic diagram of the nail feeding device in this invention.

[0020] Figure 2 is a top view of the nail feeding device in this invention.

[0021] Figure 3 is a three-dimensional structural schematic diagram of the nail feeding device in this invention.

[0022] Figure 4 is a three-dimensional structural schematic diagram of the nail feeding device in this invention.

[0023] Figure 5 is a three-dimensional structural schematic diagram of the nail feeding device in this invention.

[0024] Figure 6 is a schematic diagram of the feeding mechanism in this invention.

[0025] Figure 7 is a three-dimensional schematic diagram of the cutting mechanism in this invention.

[0026] Figure 8 is a partial perspective view of the cutting mechanism in this invention.

[0027] Figure 9 is a partial perspective view of the cutting mechanism in this invention.

[0028] Figure 10 is a three-dimensional structural schematic diagram of the screening vibration feeding mechanism in this invention.

[0029] Figure 11 is a three-dimensional structural schematic diagram of the screening vibration feeding mechanism in this invention.

[0030] Figure 12 is a three-dimensional structural schematic diagram of the two-stage lifting device in this invention.

[0031] Figure 13 is a three-dimensional structural schematic diagram of the two-stage lifting device in this invention.

[0032] Figure 14 is a schematic diagram of the structure of the gun head in this invention.

[0033] Figure 15 is a partial three-dimensional structural diagram of the gun head in this invention.

[0034] Figure 16 is a partial three-dimensional structural diagram of the gun head in this invention.

[0035] Figure 17 is a partial three-dimensional structural diagram of the gun head in this invention.

[0036] Figure 18 is a partial three-dimensional structural schematic diagram of the anti-floating engagement device in this invention.

[0037] Figure 19 is a partial three-dimensional structural schematic diagram of the anti-floating engagement device in this invention.

[0038] Figure 20 is a partial three-dimensional structural schematic diagram of the anti-floating engagement device of the present invention.

[0039] In the diagram: 1 is the nail feeding device, 11 is the base, 12 is the large hopper support, 13 is the large hopper, 14 is the large hopper baffle, 15 is the feeding mechanism, 151 is the feeding cylinder, 152 is the feeding plate, 153 is the support rib, 154 is the feeding support, 155 is the feeding port, 16 is the cutting mechanism, 160 is the connecting base plate, 161 is the cutting cylinder, 162 is the cutting cylinder fixing seat, 163 is the cutting slider pressure plate, 164 is the lower nail guide plate, 165 is the lower nail opening, 166 is the slide plate side connecting plate, 167 is the slide plate side support plate, 168 is the base plate air sealing plate, 169 is the upper end clamping plate, 1610 is the sliding... 1611 is the cutting plate, 1612 is the shielding plate rib, 17 is the screening vibrating feeding mechanism, 171 is the vibrator, 172 is the anti-vibration column of the vibrating feeding mechanism base, 173 is the vibrating feeding mechanism base, 174 is the vibrating feeding mechanism fixing plate, 175 is the contour material channel, 176 is the air blowing fixing block, 177 is the material distribution and nail receiving plate pad, 178 is the material distribution and nail receiving plate, 179 is the screw height limit plate pad, 1710 is the screw height limit plate support, 1711 is the screw height limit plate, 1712 is the screw presence / absence sensor bracket, 1713 is the screw presence / absence sensor, 18 is the two-stage lifting device, 181 is the lifting cylinder, 1 82 is the base plate of the first lifting device, 183 is the first lifting and cutting plate, 184 is the base plate of the second lifting device, 185 is the second lifting and cutting plate, 186 is the lifting device support, 187 is the cutting connecting plate, 19 is the small hopper, 110 is the sensor, 2 is the gun head, 21 is the frame, 22 is the nail feeding device, 23 is the anti-floating engagement device, 231 is the engagement device fixing seat, 232 is the engagement device support plate, 233 is the tightening guide rod sleeve, 234 is the actuating arm, 235 is the guide rod slider, 236 is the screw gripper, 237 is the pressure nozzle, 238 is the gripper cylinder, 239 is the nail clamp control finger, and 2310 is the engagement mechanism. The device consists of: base plate, 2311 base plate nail feeding pipe, 2312 oblique guide nail pipe, 2313 swing nail feeding pipe, 2314 displacement sensor bracket, 2315 displacement sensor, 2316 proximity switch mounting plate, 2317 proximity switch, 24 main pressure rail, 25 meshing linkage device, 26 tightening guide rod, 27 main pressure cylinder, 28 torque drive device, 281 servo motor, 282 rotary support shaft, 283 force-bearing base plate, 284 spline, 285 main pulley, 286 synchronous belt, 287 small pulley, 29 pre-pressure cylinder, 210 pre-pressure rail, and 211 valve island. Detailed Implementation

[0040] The present invention will be further described below with reference to specific embodiments.

[0041] As shown in Figures 1 to 20, the present invention provides a control system for a screw tightening device, including a feeding system and a tightening system. The feeding system controls the screw feeding device 1 to continuously feed screws one by one to the gun head 2, and the tightening system controls the gun head 2 to continuously tighten screws. The two work together to avoid screw piling at the gun head 2.

[0042] The feeding system controls the nail feeding device 1 to perform the following actions: after the screws are poured into the large hopper 13, the screening vibration feeding mechanism 17 is controlled to vibrate, and the screws enter the discharge port of the large hopper 13 from the gap between the large hopper 13 and the large hopper baffle 14. Then, the discharge mechanism 15 is controlled to open the discharge port, and the screws fall into the small hopper 19. The two-stage lifting device 18 is controlled to lift the screws onto the screening vibration feeding mechanism 17, and they enter the cutting mechanism 16 through the screening vibration feeding mechanism 17. Then, the cutting mechanism 16 is controlled to send the screws one by one to the tightening system.

[0043] The tightening system controls the screwdriver head 2 to perform the following actions: screws fall one by one from the screw feeding device 1 into the screw supply device 22. The screw supply device 22 is a tubular structure, and the screws cannot be rotated inside it, but can only fall in one direction. After passing through the base plate screw feeding tube 2311, the inclined guide screw tube 2312, and the swing screw feeding tube 2313, the screws enter the anti-floating engagement device 23. The pre-compression cylinder 29 controls the anti-floating engagement device 23 to move along the pre-compression track 210, so that the screws are aligned with the pressure nozzle. 237. Then, control the main pressure cylinder 27 to drive the meshing linkage device 25 to move and move the tightening guide sleeve 233 to press against the screw cap. At the same time, start the servo motor 281 to drive the tightening guide sleeve 233 to rotate, control the main pressure cylinder 27 to keep the tightening guide sleeve 233 pressing against the screw cap, and at the same time start the clamping cylinder 238 to drive the screw clamp 236 to open. The screw is disengaged from the screw clamp 236 and is completely screwed into place. Then, each cylinder is reset to prepare for the screwing of the next screw.

[0044] The structure of the nail feeding device 1 in this invention includes a base 11, a large hopper support 12, and a large hopper 13. The large hopper 13 is fixed to the base 11 via the large hopper support 12. The large hopper support 12 has a plate-like structure, and multiple large hopper support 12s are arranged around the large hopper 13. The upper end of the large hopper support 12 is fixedly connected to the outer side of the large hopper 13, and the lower end of the large hopper support 12 is fixedly arranged on the upper side of the base 11. A large hopper baffle 14 is provided on the inner side of the large hopper 13. One side of the large hopper baffle 14 is fixedly arranged on the inner side wall of the large hopper 13, and the large hopper baffle 14 is arranged around the discharge port of the large hopper 13, maintaining a certain gap with the discharge port of the large hopper 13. When discharging, the screws enter the discharge port sequentially through this gap, preventing the discharge port from being blocked by accumulated material.

[0045] A feeding mechanism 15 is provided at the discharge port of the large hopper 13. The feeding mechanism 15 is used to open and close the discharge port of the large hopper 13. A small hopper 19 is provided below the feeding mechanism 15. The small hopper 19 is fixedly mounted on the upper side of the base 11 by a two-stage lifting device 18. The lower end of the two-stage lifting device 18 is fixed on the base 11. The lifting part located at the upper end of the two-stage lifting device 18 passes through the small hopper 19 and extends above the small hopper 19. The lifting part of the two-stage lifting device 18 is connected to the screening vibration feeding mechanism 17. The inlet of the screening vibration feeding mechanism 17 is aligned with the outlet of the lifting part of the two-stage lifting device 18. The outlet of the screening vibration feeding mechanism 17 is aligned with the inlet of the cutting mechanism 16. Sensors 110 are provided in both the large hopper 13 and the small hopper 19.

[0046] The feeding mechanism 15 comprises a feeding cylinder 151, a feeding plate 152, a supporting rib 153, a feeding support 154, and a feeding port 155. The upper end of the feeding support 154 is fixedly mounted on the outer bottom of the large hopper 13, and the lower end of the feeding support 154 is fixedly mounted on the upper side of the base 11. The supporting rib 153 is horizontally positioned below the feeding port of the large hopper 13. One end of the supporting rib 153 is fixedly mounted on the feeding support 154, and the other end of the supporting rib 153 is fixedly mounted with the feeding cylinder 151. The cylinder body of the feeding cylinder 151 is fixed to the supporting rib 154. 3. A discharge plate 152 is fixedly installed on the piston rod of the discharge cylinder 151. The upper end of the discharge port 155 is movably installed on the support rib plate 153. The position of the discharge port 155 is adjusted so that it can be aligned with the discharge port of the large hopper 13, and the upper end of the discharge port 155 is in close contact with the discharge port of the large hopper 13. The lower end of the discharge port 155 is located below the support rib plate 153. The discharge port 155 is provided with an insertion slot for the discharge plate 152 to pass through. Under the drive of the discharge cylinder 151, the discharge plate 152 can match and pass through the discharge port 155 to block or open the discharge port of the large hopper 13.

[0047] The two-stage lifting device 18 comprises a lifting cylinder 181, a first lifting device base plate 182, a first lifting cutting plate 183, a second lifting device base plate 184, a second lifting cutting plate 185, a lifting device support 186, and a cutting connecting plate 187. The lower end of the lifting device support 186 is fixedly mounted on the upper side of the base 11. The first lifting device base plate 182 and the second lifting device base plate 184 are vertically spaced and fixedly mounted on the lifting device support 186. The first lifting cutting plate 183 is movably matched to the first lifting device base plate. Between the first lifting device base plate 182 and the second lifting device base plate 184, the second lifting cutting plate 185 is movably disposed on the outside of the second lifting device base plate 184. A lifting cylinder 181 is fixedly disposed on the outside of the first lifting device base plate 182. The lower ends of the first lifting cutting plate 183 and the second lifting cutting plate 185 are both fixedly disposed on the cutting connecting plate 187. One end of the cutting connecting plate 187 is connected to the piston rod of the lifting cylinder 181. The first lifting cutting plate 183 and the second lifting cutting plate 185 are driven to move up and down reciprocally by the lifting cylinder 181. The structure of the two-stage lifting device 18 is as follows: the upper ends of the first lifting device base plate 182, the first lifting cutting plate 183, the second lifting device base plate 184 and the second lifting cutting plate 185 are all provided with inclined surfaces in the same direction. These inclined surfaces are inclined downward toward the screening vibration feeding mechanism 17.

[0048] The structure of the screening vibration feeding mechanism 17 includes: a vibrator 171, a vibration feeding mechanism base anti-vibration column 172, a vibration feeding mechanism base 173, a vibration feeding mechanism fixing plate 174, a contour material channel 175, an air blowing fixing block 176, a material distribution and nail receiving plate pad 177, a material distribution and nail receiving plate 178, a screw height limiting plate pad 179, a screw height limiting plate support 1710, a screw height limiting plate 1711, a screw presence / absence sensor bracket 1712, and a screw presence / absence sensor 1713. The vibration feeding mechanism base 173 is vibrated... The anti-vibration column 172 of the feeding mechanism base is fixedly installed on the upper side of the base 11. The vibrator 171 is fixedly installed on the upper side of the vibrating feeding mechanism base 173. A vibrating feeding mechanism fixing plate 174 is fixedly installed on the upper side of the vibrating feeding mechanism fixing plate 174. A contoured material channel 175 is fixed to one end of the upper side of the vibrating feeding mechanism fixing plate 174. The contoured material channel 175 is aligned with the discharge end of the lifting part of the two-stage lifting device 18. A discharge groove is provided on the vibrating feeding mechanism fixing plate 174 on the discharge port side of the contoured material channel 175. The trough and the contoured material channel 175 are arranged in the same direction. A material distribution and receiving plate pad 177 is provided on each of the vibrating feeding mechanism fixing plates 174 on both sides of the discharge trough. A material distribution and receiving plate 178 is provided on each of the material distribution and receiving plate pads 177. A screw height limiting plate pad 179 is also provided on the upper side of the vibrating feeding mechanism fixing plate 174. A screw height limiting plate support 1710 is provided on the screw height limiting plate pad 179. The screw height limiting plate support 1710 is arranged horizontally above the material distribution and receiving plate 178. A screw height limiting plate 1711 is provided at the end, which is located directly above the discharge groove and is arranged along the direction of the discharge groove. The screw presence sensor 1713 is fixedly mounted on the vibrating feeding mechanism fixing plate 174 by a screw presence sensor bracket 1712. The detection end of the screw presence sensor 1713 extends into the space between the material distribution and receiving plates 178 above the discharge groove. An air blowing fixing block 176 is provided between the material distribution and receiving plates 178 and the contour material channel 175.

[0049] The cutting mechanism 16 is fixedly mounted on the screening vibration feeding mechanism 17. The structure of the cutting mechanism 16 includes a cutting cylinder 161, a cutting cylinder mounting base 162, a cutting slider pressure plate 163, a lower nail guide plate 164, a lower nail opening 165, and a connecting base plate 160. The connecting base plate 160 is fixedly mounted on the screening vibration feeding mechanism 17, and the cylinder body of the cutting cylinder 161 is connected and fixed to the connecting base plate 160 through the cutting slider pressure plate 163. The piston rod of the cutting cylinder 161 is connected to the cutting cylinder mounting base 162; the cutting cylinder mounting base 162 is provided with a screw profile groove on the side facing the screening vibration feeding mechanism 17, and a lower nail guide plate 164 is provided at the bottom of the cutting cylinder mounting base 162. The cutting cylinder mounting base 162 can be displaced relative to the lower nail guide plate 164 under the drive of the cutting cylinder 161. A lower nail opening 165 is provided on the lower side of the lower nail guide plate 164. The outer side of the cutting cylinder fixing seat 162 is provided with a slide side connecting plate 166, a slide side support plate 167, a bottom plate sealing plate 168, an upper end clamping plate 169, a slide bottom plate 1610, and a cutting plate 1611. The slide side connecting plate 166, slide side support plate 167, bottom plate sealing plate 168, upper end clamping plate 169, slide bottom plate 1610, and cutting plate 1611 are connected and fixed to form a cavity. The cutting cylinder fixing seat 162 is slidably disposed in this cavity. The piston rod of the cutting cylinder 161 is connected to the slide side connecting plate 166, and the cutting cylinder fixing seat 162 can move relative to the slide bottom plate 1610 within the cavity. The cutting cylinder fixing seat 162 is provided with guide structures for displacement guidance on the sides facing the slide bottom plate 1610 and the bottom plate sealing plate 168. Both the upper jaw plate 169 and the cutting plate 1611 are provided with a material shielding rib 1612 on their outer sides. The material shielding rib 1612 is fixedly installed on the connecting base plate 160 and has a notch for screws to pass through.

[0050] The working process of the nail feeding device 1 in this invention is as follows: Screws are poured into the large hopper 13. Under the vibration of the screening and vibrating feeding mechanism 17, the screws enter the discharge port of the large hopper 13 from the gap between the large hopper 13 and the large hopper baffle 14. The discharge mechanism 15 opens the discharge port, and the screws fall into the small hopper 19. Under the action of the two-stage lifting device 18, the screws are lifted to the screening and vibrating feeding mechanism 17. After passing through the screening and vibrating feeding mechanism 17, the screws enter the cutting mechanism 16 and are then fed one by one to the head of the screw-driving device through the cutting mechanism 16.

[0051] In this invention, the screw feeding device 1 slows down the screw feeding speed by setting a large hopper baffle 14 inside the large hopper 13, preventing screws from accumulating and blocking the discharge port of the large hopper 13. After the screws are lifted onto the screening vibration feeding mechanism 17, the contour material channel 175 and the air blowing fixing block 176 work together to make the screw heads face upwards and enter the discharge groove on the fixing plate 174 of the vibration feeding mechanism. Then, the screws vibrate and sequentially enter the cutting cylinder fixing seat 162 of the cutting mechanism 16. Under the action of the cutting cylinder 161, the side connecting plate 1 of the slide plate is pushed. 66. The shell formed by the cooperation of the side support plate 167 of the skateboard, the air sealing plate 168 of the bottom plate, the upper clamping plate 169, the bottom plate of the skateboard 1610 and the cutting plate 1611, drives the internal cutting cylinder fixing seat 162 to move under the movement of the shell. During the movement, the screw in the cutting cylinder fixing seat 162 is aligned with the lower nail guide plate 164 and falls off, and then enters the nail feeding channel from the lower nail opening 165. The nail feeding process of the present invention is smooth and less prone to nail jamming, which greatly improves the stability of the nail feeding and improves the nail feeding efficiency.

[0052] The structure of the gun head 2 in this invention includes a frame 21, a nail feeding device 22, an anti-floating engagement device 23, a main pressure rail 24, an engagement linkage device 25, a tightening guide rod 26, a main pressure cylinder 27, a torque drive device 28, a pre-pressure cylinder 29, and a pre-pressure rail 210. The nail feeding device 22 is mounted on the frame 21. The inlet of the nail feeding device 22 is connected to the nail delivery device. The outlet of the nail feeding device 22 is equipped with an anti-floating engagement device 23. The anti-floating engagement device 23 is mounted on the frame 21 via the pre-pressure rail 210. The power input end of the anti-floating engagement device 23 is equipped with a pre-pressure cylinder 29. The pre-pressure cylinder 29 drives the anti-floating engagement device 23 to slide back and forth on the pre-pressure rail 210.

[0053] The main pressure rail 24 is longitudinally fixed on the frame 21. The meshing linkage device 25 is slidably mounted on the main pressure rail 24. One bottom end of the meshing linkage device 25 is connected to the piston rod of the main pressure cylinder 27 fixed on the frame 21. The main pressure cylinder 27 drives the meshing linkage device 25 to slide back and forth along the main pressure rail 24. One top end of the meshing linkage device 25 is poweredly connected to the torque drive device 28. The other top end of the meshing linkage device 25 is inserted into the anti-floating meshing device 23 through the tightening guide rod 26 and can be matched and engaged with the screw entering the anti-floating meshing device 23. The structure of the torque drive device 28 includes a servo motor 281, a rotating support shaft 282, and a force-bearing... The system includes a base plate 283, a spline 284, a main pulley 285, a synchronous belt 286, and a small pulley 287. The body of the servo motor 281 is fixed to the cylinder body of the main pressure cylinder 27 via the base plate 283. The power output end of the servo motor 281 is provided with the main pulley 285. The rotating support shaft 282 is movably mounted on the base plate 283. The rotating support shaft 282 is provided with a small pulley 287. The main pulley 285 and the small pulley 287 are connected by a synchronous belt 286. The end of the rotating support shaft 282 is provided with a spline 284, which is connected to the meshing linkage device 25. The spline 284 allows for lateral movement while maintaining rotation. The screw is tightened by driving the tightening guide rod 26 to rotate through the torque drive device 28; a valve island 211 is provided on the side plate of the frame 21 below the servo motor 281, and various valves are provided on the valve island 211 to control the action of various cylinders in the device. The frame 21 has a shell structure that can cover the anti-floating engagement device 23 and the engagement linkage device 25.

[0054] The structure of the anti-floating engagement device 23 includes an engagement device fixing base 231, an engagement device support plate 232, a tightening guide rod sleeve 233, an actuating arm 234, a guide rod slider 235, a screw clamp 236, a pressure nozzle 237, a clamp cylinder 238, and a screw clamp control finger 239. The engagement device fixing base 231 has engagement device support plates 232 fixedly installed on both sides of one end. The tightening guide rod sleeve 233 is installed at the ends of the two engagement device support plates 232. A pressure nozzle 237 is installed at the end of the tightening guide rod sleeve 233. The guide rod slider 235 is slidably mounted on the tightening guide rod sleeve 233. An actuating arm 234 is installed on both sides of the guide rod slider 235. A screw clamp 236 is installed at the front end of each actuating arm 234. The clamp cylinder 238 is installed on the engagement device fixing base 231. A nail clamp control finger 239 is connected to the piston rod of the gripper cylinder 238. The nail clamp control finger 239 can push the guide rod slider 235 to move under the operation of the gripper cylinder 238. The engagement device fixing seat 231 is set on the engagement device base plate 2310. The engagement device base plate 2310 is slidably set on the preload track 210. The engagement device base plate 2310 is connected to the piston rod of the preload cylinder 29. A base plate nail feeding tube 2311 is provided through the engagement device fixing seat 231. One end of the base plate nail feeding tube 2311 is connected to the nail supply device 22. The other end of the base plate nail feeding tube 2311 is connected to the inclined guide nail tube 2312. The end of the inclined guide nail tube 2312 is connected to the swing nail feeding tube 2313. The end of the swing nail feeding tube 2313 is connected to the inner tube of the tightening guide rod sleeve 233.

[0055] A displacement sensor bracket 2314 is provided on the side of the engagement device fixing seat 231. The displacement sensor bracket 2314 is set close to the side plate of the frame 21. A displacement sensor 2315 is provided on the displacement sensor bracket 2314. A proximity switch mounting plate 2316 is provided on the engagement device fixing seat 231. A proximity switch 2317 is provided on the proximity switch mounting plate 2316. The displacement sensor 2315 and the proximity switch 2317 are used to limit displacement and control cylinder reset.

[0056] In this invention, after the screws fall one by one from the screw feeding device into the screw supply device 22, the screw supply device 22 is a tubular structure. The screws cannot be rotated inside and can only fall in one direction. After passing through the base plate screw feeding pipe 2311, the inclined guide screw pipe 2312 and the swing screw feeding pipe 2313, they enter the anti-floating engagement device 23. Driven by the pre-pressure cylinder 29, the anti-floating engagement device 23 moves along the pre-pressure track 210 to align the screw with the pressure nozzle 237. The main pressure cylinder 27 drives the engagement linkage device 25 to move and press the tightening guide sleeve 233 onto the screw cap. At the same time, the servo motor 281 is started to drive the tightening guide sleeve 233 to rotate, while the main pressure cylinder 27 is controlled to keep the tightening guide sleeve 233 pressing the screw cap. At the same time, the clamping cylinder 238 is started to drive the screw clamp 236 to open, and the screw is completely screwed into place after being disengaged from the screw clamp 236. Then, each cylinder is reset to prepare for the screwing of the next screw.

[0057] The present invention integrates the anti-floating engagement device 23 and the engagement linkage device 25 into the gun head 2, and passes through the nail feeding device 22, without affecting the smoothness of screw feeding. Moreover, the pre-pressurization cylinder 29 is used to pre-press and tighten the screw to ensure that the screw is upright and tightened, thus ensuring the accuracy of subsequent tightening. The servo motor 281 and the main pressure cylinder 27 ensure that continuous pressure is maintained during tightening, ensuring that the screw is tightened smoothly, greatly shortening the active torque and making the overall structure more compact.

[0058] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A control system for a screw tightening device, characterized in that, It includes a feeding system and a tightening system. The feeding system controls the nail feeding device (1) to continuously feed nails one by one to the gun head (2), and the tightening system controls the gun head (2) to continuously tighten the screws. The two work together to avoid nail piling at the gun head (2). The feeding system controls the nail feeding device (1) to perform the following actions: after the screws are poured into the large hopper (13), the screening vibration feeding mechanism (17) is controlled to vibrate, and the screws enter the discharge port of the large hopper (13) from the gap between the large hopper (13) and the large hopper baffle (14). Then the feeding mechanism (15) is controlled to open the discharge port, and the screws fall into the small hopper (19). The two-stage lifting device (18) is controlled to lift the screws onto the screening vibration feeding mechanism (17), and they enter the cutting mechanism (16) through the screening vibration feeding mechanism (17). Then the cutting mechanism (16) is controlled to send them one by one to the tightening system. The tightening system controls the gun head (2) to perform the following actions: screws fall one by one from the feeding device (1) into the feeding device (22). The feeding device (22) is a tubular structure, and the screws cannot be rotated inside it, but can only fall in one direction. After passing through the base plate feeding tube (2311), the oblique guide tube (2312), and the swing feeding tube (2313), the screws enter the anti-floating engagement device (23). The pre-pressure cylinder (29) drives the anti-floating engagement device (23) to move along the pre-pressure track (210) so that the screws are aligned with the pressure nozzle. (237) Then control the main pressure cylinder (27) to drive the meshing linkage device (25) to move and press the tightening guide sleeve (233) onto the screw cap. At the same time, start the servo motor (281) to drive the tightening guide sleeve (233) to rotate, and control the main pressure cylinder (27) to keep the tightening guide sleeve (233) pressing the screw cap. At the same time, start the clamping cylinder (238) to drive the screw clamp (236) to open. The screw is disengaged from the screw clamp (236) and is completely screwed into place. Then each cylinder is reset to prepare for the screwing of the next screw.

2. The control system for a screw tightening device according to claim 1, characterized in that, The structure of the nail feeding device (1) is as follows: it includes a base (11), a large hopper support (12), and a large hopper (13). The large hopper (13) is fixed to the base (11) by the large hopper support (12). The large hopper support (12) has a plate-like structure. Multiple large hopper support (12) are arranged around the large hopper (13). The upper end of the large hopper support (12) is fixedly connected to the outer side of the large hopper (13), and the lower end of the large hopper support (12) is fixedly arranged on the upper side of the base (11). A large hopper baffle (14) is provided on the inner side of the large hopper (13). One side of the large hopper baffle (14) is fixedly arranged on the inner side wall of the large hopper (13), and the large hopper baffle (14) is arranged around the discharge port of the large hopper (13) and maintains a certain gap with the discharge port of the large hopper (13). A feeding mechanism (15) is provided at the discharge port of the large hopper (13). The feeding mechanism (15) is used to open and close the discharge port of the large hopper (13). A small hopper (19) is provided below the feeding mechanism (15). The small hopper (19) is fixedly installed on the upper side of the base (11) by a two-stage lifting device (18). The lower end of the two-stage lifting device (18) is fixed on the base (11). The lifting part located at the upper end of the two-stage lifting device (18) passes through the small hopper (19) and extends to the top of the small hopper (19). The lifting part of the two-stage lifting device (18) is connected to the screening vibration feeding mechanism (17). The inlet of the screening vibration feeding mechanism (17) is aligned with the outlet of the lifting part of the two-stage lifting device (18). The outlet of the screening vibration feeding mechanism (17) is aligned with the inlet of the cutting mechanism (16).

3. A control system for a screw tightening device according to claim 2, characterized in that, The structure of the feeding mechanism (15) is as follows: it includes a feeding cylinder (151), a feeding plate (152), a supporting rib (153), a feeding support (154), and a feeding port (155). The upper end of the feeding support (154) is fixedly installed on the outer side of the bottom of the large hopper (13), and the lower end of the feeding support (154) is fixedly installed on the upper side of the base (11). The supporting rib (153) is horizontally installed below the feeding port of the large hopper (13). One end of the supporting rib (153) is fixedly installed on the feeding support (154), and the other end of the supporting rib (153) is fixedly installed with the feeding cylinder (151). The cylinder body of the feeding cylinder (151) is fixed on the supporting rib (155). 53) On the piston rod of the discharge cylinder (151), a discharge plate (152) is fixedly installed; the upper end of the discharge port (155) is movably installed on the support rib plate (153). The position of the discharge port (155) is adjusted so that it can be aligned with the discharge port of the large hopper (13), and the upper end of the discharge port (155) is close to the discharge port of the large hopper (13). The lower end of the discharge port (155) is located below the support rib plate (153). The discharge port (155) is provided with an insertion slot for the discharge plate (152) to pass through. Under the drive of the discharge cylinder (151), the discharge plate (152) can match and pass through the discharge port (155) to block or open the discharge port of the large hopper (13).

4. A control system for a screw tightening device according to claim 2, characterized in that, The structure of the two-stage lifting device (18) includes a lifting cylinder (181), a first lifting device base plate (182), a first lifting cutting plate (183), a second lifting device base plate (184), a second lifting cutting plate (185), a lifting device support (186), and a cutting connecting plate (187). The lower end of the lifting device support (186) is fixedly mounted on the upper side of the base (11). The first lifting device base plate (182) and the second lifting device base plate (184) are vertically spaced and fixedly mounted on the lifting device support (186). The first lifting cutting plate (183) is movably matched between the first lifting device base plate (182) and the second lifting device base plate (184). The second lifting cutting plate (185) is movably mounted on the second lifting device. Outside the base plate (184), a lifting cylinder (181) is fixedly installed on the outside of the first lifting device base plate (182). The lower ends of the first lifting cutting plate (183) and the second lifting cutting plate (185) are both fixedly installed on the cutting connecting plate (187). One end of the cutting connecting plate (187) is connected to the piston rod of the lifting cylinder (181). The first lifting cutting plate (183) and the second lifting cutting plate (185) are driven to move up and down reciprocally by the lifting cylinder (181). The upper ends of the first lifting device base plate (182), the first lifting cutting plate (183), the second lifting device base plate (184), and the second lifting cutting plate (185) are all provided with inclined surfaces in the same direction. The inclined surfaces are inclined downward toward the screening vibration feeding mechanism (17).

5. A control system for a screw tightening device according to claim 2, characterized in that, The structure of the screening vibration feeding mechanism (17) is as follows: it includes a vibrator (171), a vibration feeding mechanism base anti-vibration column (172), a vibration feeding mechanism base (173), a vibration feeding mechanism fixing plate (174), a contour material channel (175), an air blowing fixing block (176), a material distribution and nail receiving plate pad (177), a material distribution and nail receiving plate (178), a screw height limiting plate pad (179), a screw height limiting plate support (1710), a screw height limiting plate (1711), a screw presence / absence sensor bracket (1712), and a screw presence / absence sensor (1713). The vibration feeding mechanism base (173) The vibrating feeder (171) is fixedly mounted on the upper side of the base (11) by the anti-vibration column (172) of the base of the vibrating feeder. The vibrating feeder (171) is fixedly mounted on the upper side of the base (173) of the vibrating feeder. A vibrating feeder fixing plate (174) is fixedly mounted on the upper side of the vibrating feeder fixing plate (174). A contoured material channel (175) is fixed at one end of the upper side of the vibrating feeder fixing plate (174). The contoured material channel (175) is aligned with the discharge end of the lifting part of the two-stage lifting device (18). A discharge groove is provided on the vibrating feeder fixing plate (174) on the discharge port side of the contoured material channel (175). The discharge groove and the contour feeding channel (175) are arranged in the same direction. A material distribution and receiving plate pad (177) is provided on each of the vibrating feeding mechanism fixing plates (174) on both sides of the discharge groove. A material distribution and receiving plate (178) is provided on each of the material distribution and receiving plate pads (177). A screw height limiting plate pad (179) is also provided on the upper side of the vibrating feeding mechanism fixing plate (174). A screw height limiting plate support (1710) is provided on the screw height limiting plate pad (179). The screw height limiting plate support (1710) is arranged horizontally above the material distribution and receiving plate (178). A screw height limit plate (1711) is provided at the end of the 0), the screw height limit plate (1711) is located directly above the discharge groove, and the screw height limit plate (1711) is arranged along the discharge groove direction. The screw presence or absence sensor (1713) is fixedly mounted on the vibrating feeding mechanism fixing plate (174) by the screw presence or absence sensor bracket (1712). The detection end of the screw presence or absence sensor (1713) extends into the space between the material distribution receiving plate (178) above the discharge groove. An air blowing fixing block (176) is provided between the material distribution receiving plate (178) and the contour material channel (175).

6. A control system for a screw tightening device according to claim 2, characterized in that, The cutting mechanism (16) is fixedly mounted on the screening vibration feeding mechanism (17). The structure of the cutting mechanism (16) includes a cutting cylinder (161), a cutting cylinder mounting base (162), a cutting slider pressure plate (163), a lower nail guide plate (164), a lower nail opening (165), and a connecting base plate (160). The connecting base plate (160) is fixedly mounted on the screening vibration feeding mechanism (17). The cylinder body of the cutting cylinder (161) is connected and fixed to the connecting base plate (160) through the cutting slider pressure plate (163). The piston rod of (161) is connected to the cutting cylinder mounting base (162); the cutting cylinder mounting base (162) is provided with a screw profile groove on the side facing the screening vibration feeding mechanism (17), and a lower nail guide plate (164) is provided at the bottom of the cutting cylinder mounting base (162). The cutting cylinder mounting base (162) can be displaced relative to the lower nail guide plate (164) under the drive of the cutting cylinder (161). A lower nail opening (165) is provided on the lower side of the lower nail guide plate (164); a sliding groove is provided on the outer side of the cutting cylinder mounting base (162). The slide includes a side connecting plate (166), a slide side support plate (167), a bottom plate sealing plate (168), an upper end clamping plate (169), a slide bottom plate (1610), and a cutting plate (1611). These components are connected and fixed to form a cavity. The cutting cylinder fixing seat (162) is slidably disposed within this cavity. The piston rod of the cutting cylinder (161)... On the connecting plate (166) of the connecting slide, the cutting cylinder fixing seat (162) can be relatively displaced in the cavity; the cutting cylinder fixing seat (162) is provided with a guide structure for displacement guidance on the side facing the slide bottom plate (1610) and the bottom plate sealing plate (168); the upper end bayonet plate (169) and the outer side of the cutting plate (1611) are provided with a material shielding plate rib (1612), the material shielding plate rib (1612) is fixedly set on the connecting bottom plate (160), and the material shielding plate rib (1612) is provided with a notch for screws to pass through.

7. A control system for a screw tightening device according to claim 2, characterized in that, The structure of the gun head (2) includes a frame (21), a nail feeding device (22), an anti-floating engagement device (23), a main pressure rail (24), an engagement linkage device (25), a tightening guide rod (26), a main pressure cylinder (27), a torque drive device (28), a pre-pressure cylinder (29), and a pre-pressure rail (210). The nail feeding device (22) is mounted on the frame (21). The inlet of the nail feeding device (22) is connected to the nail feeding device. The outlet of the nail feeding device (22) is equipped with an anti-floating engagement device (23). The anti-floating engagement device (23) is mounted on the frame (21) via the pre-pressure rail (210). The power input end of the anti-floating engagement device (23) is equipped with a pre-pressure cylinder (29). The pre-pressure cylinder (29) drives the anti-floating engagement device (23) to slide back and forth on the pre-pressure rail (210). The main pressure rail (24) is longitudinally fixed on the frame (21), and the meshing linkage device (25) is slidably mounted on the main pressure rail (24). One bottom end of the meshing linkage device (25) is connected to the piston rod of the main pressure cylinder (27) fixed on the frame (21). The meshing linkage device (25) is driven to slide back and forth along the main pressure rail (24) by the main pressure cylinder (27). One top end of the meshing linkage device (25) is poweredly connected to the torque drive device (28). The other top end of the meshing linkage device (25) is inserted into the anti-floating meshing device (23) through the tightening guide rod (26) and can be matched and engaged with the screw that enters the anti-floating meshing device (23). The screw is tightened by driving the tightening guide rod (26) to rotate through the torque drive device (28).

8. A control system for a screw tightening device according to claim 2, characterized in that, The structure of the anti-floating engagement device (23) is as follows: it includes an engagement device fixing seat (231), an engagement device support plate (232), a tightening guide rod sleeve (233), an actuating arm (234), a guide rod slider (235), a screw gripper (236), a pressure nozzle (237), a gripper cylinder (238), and a screw clamp control finger (239). The engagement device fixing seat (231) has engagement device support plates (232) fixedly installed on both sides of one end. The tightening guide rod sleeve (233) is located at the ends of the two engagement device support plates (232). The end is provided with a pressure nozzle (237), and the guide rod slider (235) is slidably mounted on the tightening guide rod sleeve (233). Both sides of the guide rod slider (235) are provided with actuating arms (234), and the front end of each actuating arm (234) is provided with a screw gripper (236). The gripper cylinder (238) is mounted on the engagement device fixing seat (231), and a nail clamping control finger (239) is connected to the piston rod of the gripper cylinder (238). The nail clamping control finger (239) can push the guide rod slider (235) to move under the operation of the gripper cylinder (238); the engagement device... A fixed base (231) is installed on the base plate (2310) of the engagement device. The base plate (2310) of the engagement device is slidably installed on the preload track (210). The base plate (2310) of the engagement device is connected to the piston rod of the preload cylinder (29) through the base plate (2310). A base plate nail feeding pipe (2311) is installed through the fixed base (231) of the engagement device. One end of the base plate nail feeding pipe (2311) is connected to the nail supply device (22). The other end of the base plate nail feeding pipe (2311) is connected to an inclined guide nail pipe (2312). The end of the inclined guide nail pipe (2312) is connected to the base plate nail feeding device (22). The part is connected to a swing nail feeding tube (2313), the end of which is connected to the inner tube of the tightening guide rod sleeve (233); a displacement sensor bracket (2314) is provided on the side of the engagement device fixing seat (231), the displacement sensor bracket (2314) is set close to the side plate of the frame (21), and a displacement sensor (2315) is provided on the displacement sensor bracket (2314); a proximity switch mounting plate (2316) is provided on the engagement device fixing seat (231), and a proximity switch (2317) is provided on the proximity switch mounting plate (2316).

9. A control system for a screw tightening device according to claim 2, characterized in that, The torque drive device (28) has the following structure: a servo motor (281), a rotating support shaft (282), a force-bearing base plate (283), a spline (284), a main pulley (285), a synchronous belt (286), and a small pulley (287). The body of the servo motor (281) is fixed to the cylinder body of the main pressure cylinder (27) through the force-bearing base plate (283). The power output end of the servo motor (281) is provided with a main pulley (285). The rotating support shaft (282) is movably mounted on the force-bearing base plate (283). A small pulley (287) is provided on the rotating support shaft (282). The main pulley (285) and the small pulley (287) are connected by a synchronous belt (286). The end of the rotating support shaft (282) is provided with a spline (284) and is connected by a spline (284) to the meshing linkage device (25).

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