Automatic screw locking device and working method thereof

Abstract

The present invention discloses an automatic screw locking device and a working method thereof, belonging to the technical field of screw locking devices. The device comprises a device controller, a transmission belt, a lifting and jacking unit, an outer frame seat, an X-axis linear drive unit, a Y-axis linear drive unit, a screw locking module, a screw feeding unit and a workpiece positioning unit, wherein the transmission belt is fixed to the ground by a support leg; the lifting and jacking unit is arranged on the inner side of the transmission belt, and a height limiter is fixed to the lifting end of the lifting and jacking unit; the X-axis linear drive unit comprises two groups of X-axis linear positioners fixed to the top surface of the outer frame seat in the longitudinal direction, and the Y-axis linear drive unit comprises a seat plate, and a group of Y-axis linear positioners is fixed to the seat plate; the automatic screw locking device and the working method thereof of the present invention can realize workpiece feeding, lifting and locking, and reset output, forming automatic locking, and can ensure the locking accuracy of each locking hole of the workpiece.

Description

Technical Field

[0001] The present invention specifically relates to an automatic screw locking device and a working method thereof, and belongs to the technical field of screw locking devices. Background Art

[0002] A screw locking machine is an automated device used for screw locking. Its use can greatly improve the efficiency and precision of screw assembly. For example, Chinese Patent Publication No. CN119927613A discloses a locking mechanism and a screw locking machine. The locking mechanism includes a base plate, a locking assembly, a material storage tray, and a material storage drive assembly. The locking assembly is used to absorb screws and insert them into the workpiece to lock the screws. Currently, locking equipment is widely used for locking plate-like workpieces, such as blackboard teaching aids, furniture manufacturing, and door and window assembly. However, when facing large-sized plate-like workpieces, there is a common technical bottleneck of limited unidirectional locking capabilities, as follows:

[0003] Low efficiency in multi-sided machining: Traditional equipment only supports screw fastening in the vertical direction (Z-axis). To process the side (horizontal) of a workpiece, manual workpiece flipping or multiple clamping are required. For example, for a cubic plate workpiece (such as a door panel), traditional equipment requires five independent clampings to fasten all five sides. Each clamping requires manual adjustment of the workpiece position, making it difficult to meet the efficiency requirements of mass production.

[0004] Insufficient positioning accuracy: Using a single-axis cylinder to clamp the workpiece on one side, the horizontal plane (X / Y axis) positioning error is large, resulting in significant deviation in the screw hole alignment during side locking. After the workpiece is assembled, the verticality of the screws is out of tolerance, requiring frequent rework.

[0005] Limited automation: Horizontal locking relies on manual intervention (such as manually flipping the workpiece or adjusting the equipment position), which not only increases labor intensity but also leads to quality issues such as inconsistent locking torque and screw stripping due to differences in human operation. Summary of the Invention

[0006] To solve the above problems, the present invention proposes an automatic screw locking device and a working method thereof, which can realize workpiece feeding and delivery, jacking and locking, and reset output, forming automatic locking, and can ensure the locking accuracy of each locking hole of the workpiece.

[0007] The automatic screw locking device of the present invention comprises:

[0008] The equipment controller for the whole machine control is used to control the entire locking process of workpiece feeding, lifting and locking, and reset output;

[0009] The transmission belt is fixed to the ground by supporting legs; the transmission belt is used to receive the workpiece, deliver the workpiece to be locked to the locking position, and deliver the locked workpiece out of the processing position; realize the automatic flow of materials, improve the degree of automation of the equipment and production efficiency;

[0010] A lifting unit is provided inside the transmission belt, and a height limiter is fixed to the lifting end of the lifting unit; the height limiter can limit the lifting height of the lifting unit, thereby separating the workpiece from the transmission belt and controlling the lifting height, thereby achieving precise alignment of the locking hole;

[0011] An outer frame seat is arranged outside the transmission belt and is lower than the top surface of the transmission belt; the outer frame seat can serve as a support member of the X-axis linear drive unit, and when the transmission belt transmits the workpiece, the outer frame seat will not interfere with the workpiece;

[0012] The transmission belt, lifting unit and outer frame seat are all fixed to the ground by supporting feet;

[0013] An X-axis linear drive unit, comprising two sets of X-axis linear positioners fixed to the top surface of the outer frame seat in the longitudinal direction;

[0014] A Y-axis linear drive unit, the Y-axis linear drive unit comprising a base plate, a set of Y-axis linear positioners being fixed on the base plate;

[0015] Each set of the X-axis linear positioners and each set of the Y-axis linear positioners are composed of two sets of electric linear slides with two sliders; the screw threads of the two sliders of the electric linear slides are in opposite directions, and when the electric linear slides are in motion, the two sliders move closer to or away from each other;

[0016] The screw locking module includes a Z-axis screw locking device fixed to one slider of the Y-axis linear positioner and an X-axis screw locking device fixed to the other slider of the Y-axis linear positioner. The module also includes a Y-axis screw locking device fixed to one slider of the X-axis linear positioner. The base plate is fixed to the other sliders of the two facing X-axis linear positioners. The Z-axis screw locking device is used to precisely control the height of the screws in the vertical direction.

[0017] The screw feeding unit has a discharge end connected to the screw clamping nozzle of the screw locking module through a blow pipe. The screw feeding unit realizes the orderly feeding of screws. The screw feeding unit uses components such as a vibrating plate and a linear feeder to sequentially deliver the screws to the screw clamping nozzle, ensuring continuous and stable feeding, avoiding interruptions in locking, and improving the operating efficiency of the equipment.

[0018] The workpiece positioning unit includes an end positioning unit and a side positioning unit; the end positioning unit can be used to position the end of the lifted workpiece, and the side positioning unit can be used to limit the side of the workpiece.

[0019] Furthermore, the lifting and jacking unit includes a lifting and receiving platform, which includes two longitudinal profiles, and a plurality of transverse profiles are fixed between the two longitudinal profiles, the transverse profiles and the top surfaces of the longitudinal profiles are flush, and the longitudinal profiles and the transverse profiles are installed to be fixed with a lifting seat plate, the bottom of the lifting seat plate is fixed to the piston rod of the first lifting cylinder, and the first lifting cylinder is fixed to the adjustment seat plate; the adjustment seat plate is fixed to the support leg; the height limiter includes a guide bearing that is embedded and fixed with the adjustment seat plate, and a limiting column is slidingly provided on the inner side of the guide bearing, and threaded sections are provided at the upper and lower parts of the limiting column, and a first limiting nut is screwed on; the top of the limiting column is fixed to the lifting seat plate; during operation, the pulling-up height of the limiting column can be adjusted by rotating the first limiting nut; when the first lifting cylinder drives the lifting and receiving platform to move straight upward through the lifting seat plate, the upward height is limited by the first limiting nut and the adjustment seat plate, so that the rising height of the lifting and receiving platform can be accurately controlled.

[0020] Furthermore, the limiting column and the lifting base plate are fixed by a flange; a grating ruler is provided between the limiting column and the adjusting base plate, and the lifting height can be accurately captured by the grating ruler.

[0021] Furthermore, the support seats of the X-direction screw locking device and the Y-direction screw locking device are both fixed to the box seats with hollow ends, and the outside of the box seat is fixed with a hanging seat by a locking bolt, and the support seat or the box seat is provided with a long hole in the screw locking direction; the long hole and the hanging seat are fixed by a locking bolt; the hanging seat is fixed to the slider of the electric linear slide; when in use, the support seats of the X-direction screw locking device and the Y-direction screw locking device are slid and adjusted on the box seat, and the position is locked after adjustment, or the box seat and the hanging seat are slid and adjusted, and the position is locked after adjustment, so that the locking spacing of the X-direction screw locking device and the Y-direction screw locking device on the workpiece can be adjusted according to the width of the workpiece.

[0022] Furthermore, the end positioning unit includes a frame-shaped support plate, which is attached to a limit plate on the side away from the Y-axis linear positioner, and an adjusting screw and a plurality of first adjusting slides are fixed on the limit plate, and the adjusting screw and the first adjusting slide moveably pass through the support plate; the adjusting screw and the first adjusting slide are lower than the bottom of the Y-axis linear positioner; the adjusting screw is screwed with a second limit nut on both sides of the support plate; the support plate is fixed to the middle of the Y-axis linear positioner or fixed to the support leg by a second lifting cylinder; the end positioning unit can be directly fixed to the middle of the Y-axis linear positioner or to the second lifting cylinder; the support plate can be driven to rise and fall by the second lifting cylinder to limit the end of the workpiece; when the limit position is adjusted, the distance between the limit plate and the Y-axis linear positioner is adjusted by rotating the second limit nut.

[0023] Furthermore, the side positioning unit includes a horizontal slot seat, a side push cylinder is fixed on the inner side of the horizontal slot seat, and the piston rod of the side push cylinder is movably passed through the horizontal slot seat and is fixed to the side push plate; two side adjustment screws are also fixed on the side push plate, and the side adjustment screws are movably passed into the horizontal slot seat and are screwed with a third limit nut; the horizontal slot seat is fixed to the side of the Y-direction screw locking device or fixed to the support leg through the third lifting cylinder; the horizontal slot seat can be driven to rise and fall by the third lifting cylinder, or the horizontal slot seat can be directly fixed to the side of the Y-direction screw locking device, and then the side push plate is driven to be pushed outward by the side push cylinder, and the outward push distance is limited by the third limit nut. At this time, the side push cylinder is used to position the lifted workpiece in the length direction.

[0024] Furthermore, the Z-direction screw locking equipment includes a Z-direction electric slide fixed on a slider of the Y-direction linear positioner, and a lifting slide is fixed on the sliding end of the Z-direction electric slide, and a first locking screw cylinder is fixed on the lifting slide, and a first electric screwdriver is fixed on the movable end of the first locking screw cylinder; a screw bit is installed on the rotating end of the first electric screw driver, and a screw clamp is fixed on the lifting slide opposite the screw bit; the Z-direction electric slide can drive the screw clamp to descend to the locking position, and drive the first electric screw driver downward through the first locking screw cylinder to send the screw into the locking hole and complete the locking; the Z-direction screw locking equipment is used for precise control of the vertical screw locking height, and cooperates with the Z-direction electric slide to adjust the vertical position of the screw locking gun to ensure that the locking height of the vertical surface of the workpiece (such as the upper and lower edges of the side) meets the process standards, thereby improving the vertical locking quality.

[0025] Furthermore, the X-direction screw locking device and the Y-direction screw locking device both include a support seat, a wire locking guide rail is fixed to the front side of the support seat, a nozzle slider and an electric screw driver slider are slidably provided on the wire locking guide rail, the nozzle slider moves through the limiting bolt and is screwed to the electric screw driver slider, a second electric screw driver is fixed on the electric screw driver slider; a screw nozzle is fixed on the nozzle slider; the screw head of the second electric screw driver is arranged opposite to the screw nozzle; the limiting bolt is sleeved with a spring body between the nozzle slider and the electric screw driver slider; a second screw locking cylinder is fixed to the rear side of the support seat; the piston rod of the second screw locking cylinder is fixed to the electric screw driver slider. The second locking screw cylinder is used as the power source to provide stable horizontal power for the second electric screwdriver, and the screws are stably delivered to the screw locking module; when working, the second locking screw cylinder drives the electric screwdriver slider to slide along the wire locking guide rail, and is pushed by the spring body to drive the clamping nozzle slider forward. When the screw clamping nozzle of the clamping nozzle slider reaches the limit end of the wire locking guide rail, as the screwdriver head of the second electric screwdriver moves forward, the screw can be stably delivered into the locking hole of the workpiece and the locking work is completed.

[0026] A working method of an automatic screw locking device, using the automatic screw locking device, the method is as follows:

[0027] S1, obtain the workpiece locking hole position and related data, first measure the position of the locking hole in the length direction of the workpiece and the locking hole on the top surface; secondly, calculate the thickness distance from the center point of the locking hole in the length direction and the width direction of the workpiece to the bottom surface of the workpiece, then calculate the X-axis distance between the center point of the locking hole in the length direction of the workpiece and the center point of the locking hole on the top surface; then, obtain the position of the locking hole in the width direction of the workpiece and the locking hole on the top surface; and calculate the Y-axis distance between the center point of the locking hole in the width direction of the workpiece and the center point of the locking hole on the top surface;

[0028] S2, screw locking adaptation setting, first, the device controller obtains the X-axis spacing obtained in S1, and subtracts the fixed deviation value of the screw locking device from the X-axis spacing to obtain the first adjustment spacing; the device controller controls the X-axis linear positioner to rotate forward or reverse, so that the two sliders move closer to or away from each other, to achieve the response of the first adjustment spacing; at this time, the X-axis screw locking device is facing the center point of the locking hole in the length direction of the workpiece; at the same time, the center point of the locking hole on the top surface of the workpiece is consistent with the X-axis position of the Z-axis screw locking device; then, the device controller obtains the Y-axis spacing obtained in S1, and subtracts the Y-axis spacing The fixed deviation value of the screw locking device is removed; the second adjustment spacing is obtained; the device controller controls the Y-axis linear positioner to achieve the response of the second adjustment spacing; at this time, the Y-axis screw locking device is facing the center point of the screw hole in the width direction of the workpiece; at the same time, the center point of the screw hole on the top surface of the workpiece is facing the center point of the Z-axis screw locking device; finally, the device controller obtains the thickness spacing obtained in S1, calculates the difference between the thickness spacing and the initial thickness value, obtains the correction value, and sums the correction value with the initial screw locking travel distance of the Z-axis screw locking device to obtain the travel distance of the Z-axis screw locking device;

[0029] S3, positioning adaptability setting, first adjust the height limiter so that the horizontal plane of the center of the screw hole in the length direction and the width direction of the workpiece coincides with the horizontal plane of the bit axis of the X-axis screw locking device and the Y-axis screw locking device;

[0030] Since the distance between the sliding end of the electric linear slide and the end positioning unit and the side positioning unit will inevitably change after the electric linear slide responds to the first adjustment distance and the second adjustment distance, it is necessary to initialize the positioning of the workpiece using the end positioning unit and the side positioning unit; then, the stroke of the end positioning unit and the side positioning unit is adjusted so that the bit axis of the X-axis screw locking device and the Y-axis screw locking device are aligned with the center point of the screw hole in the length direction and the width direction of the workpiece;

[0031] S4, screw locking, the workpiece to be locked is transported by the transmission belt. When the workpiece moves to the top of the lifting and jacking unit, the lifting and jacking unit performs the jacking action. Then, the workpiece positioning unit limits the workpiece. At the same time, the screw clamp of the screw locking module receives the screws sent by the screw feeding unit. Then, the screw locking module is activated to lock the screws into the various locking holes on each surface of the workpiece. After the locking is completed, the lifting and jacking unit is reset, and the workpiece that has been locked falls onto the transmission belt, and the transmission belt sends it to the next station.

[0032] Furthermore, a comparison table is established for each of the thickness spacing, X-direction spacing and Y-direction spacing, respectively, and the comparison table includes a thickness spacing-height limiter adjustment spacing association table, an X-direction spacing-end positioning unit adjustment spacing association table, and a Y-direction spacing-side positioning unit adjustment spacing association table; when S1 obtains the workpiece locking hole position and related data, the adjustment spacing data can be directly obtained.

[0033] Compared with the prior art, the automatic screw locking equipment and working method of the present invention, through a multi-directional synchronous locking design, can complete the screw locking of five sides (up, down, left, right, front) of the workpiece in one clamping, without manual turning or multiple positioning; ensure the horizontal plane positioning accuracy, cooperate with the automatic locking system, when working, an electric linear slide is used to realize the action of the screw locking module, complete the X-direction and Z-direction synchronous positioning of the workpiece locking hole, and can complete the Y-direction and Z-direction synchronous positioning of the workpiece locking hole; ensure positioning accuracy, after completing the position locking of the screw locking module, the initial position of the workpiece can be locked by the height limiter, the end positioning unit and the side positioning unit; thereby ensuring the precise locking of each locking hole of the workpiece; when working, the workpiece feeding, lifting and locking and reset output can be realized by the transmission belt and the lifting and jacking unit, forming automatic locking. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a schematic diagram of the overall layout structure of the automatic screw locking equipment of the present invention.

[0035] Figure 2 For the present invention Figure 1 Schematic diagram of the locally enlarged structure at point A in the middle.

[0036] Figure 3 For the present invention Figure 1 Schematic diagram of the locally enlarged structure at point B in the middle.

[0037] Figure 4 This is a schematic diagram of the installation structure of the lifting and jacking unit and the height limiter of the present invention.

[0038] Figure 5 It is a schematic diagram of the structure of the mounting base of the Y-axis screw locking device of the present invention.

[0039] Figure 6 It is a schematic structural diagram of the Y-direction screw locking device of the present invention.

[0040] Figure 7 This is a schematic diagram of the installation structure of the Y-direction screw locking device, box base and hanging base of the present invention.

[0041] Figure 8 This is a schematic diagram of the installation structure of the X-direction screw locking device, box base and hanging base of the present invention.

[0042] Figure 9It is a schematic diagram of the overall structure of the end positioning unit of the present invention.

[0043] Figure 10 This is a structural diagram of the end positioning unit of the present invention installed on the Y-axis linear positioner.

[0044] Figure 11 This is a schematic structural diagram of an embodiment of the side positioning unit of the present invention.

[0045] Figure 12 It is a schematic structural diagram of another embodiment of the side positioning unit of the present invention.

[0046] Figure 13 This is a schematic diagram of the workpiece locking hole positions and associated data of the present invention.

[0047] Figure markings: 1. Transmission belt, 2. Outer frame seat, 3. X-axis linear positioner, 4. Seat plate, 5. Y-axis linear positioner, 6. Electric linear slide, 7. Z-axis screw locking device, 8. X-axis screw locking device, 9. Y-axis screw locking device, 10. Screw feeding unit, 11. Lifting receiving platform, 12. Lifting seat plate, 13. First lifting cylinder, 14. Limiting column, 15. First limiting nut, 16. Box seat, 17. Hanging seat, 18. Back plate, 19. Limiting plate, 20. Positioning screw, 21. First 1. Positioning slide rod, 22. Positioning seat plate, 23. Second limiting nut, 24. Horizontal slot seat, 25. Side push cylinder, 26. Side push plate, 27. Side positioning screw, 28. Third limiting nut, 29. Third lifting cylinder, 30. Z-axis electric slide, 31. Lifting slide, 32. First locking cylinder, 33. First electric screwdriver, 34. Screw clamp, 35. Support seat, 36. Locking wire guide, 37. Clamp slider, 38. Electric screwdriver slider, 39. Second electric screwdriver, 40. Spring body, 41. Second locking cylinder, W1, locking hole in the length direction of the workpiece, W2, locking hole on the top surface, W3, locking hole in the width direction of the workpiece, D1, thickness spacing, x1, X-direction spacing, y1, Y-direction spacing. DETAILED DESCRIPTION

[0048] Example:

[0049] like Figures 1 to 13 The automatic screw locking device shown includes:

[0050] The equipment controller for the whole machine control is used to control the entire locking process of workpiece feeding, lifting and locking, and reset output;

[0051] The transmission belt 1 is fixed to the ground by supporting legs; the transmission belt 1 is used to receive the workpiece, deliver the workpiece to be locked to the locking position, and deliver the workpiece that has been locked out of the processing position; realize the automatic flow of materials, improve the degree of automation of the equipment and production efficiency;

[0052] A lifting unit is provided inside the transmission belt 1, and a height limiter is fixed to the lifting end of the lifting unit; the height limiter can limit the lifting height of the lifting unit, thereby separating the workpiece from the transmission belt 1, and can control the lifting height, thereby achieving precise alignment of the locking hole;

[0053] The outer frame seat 2 is arranged outside the transmission belt 1 and is lower than the top surface of the transmission belt 1. The outer frame seat 2 can serve as a support member of the X-axis linear drive unit, and when the transmission belt 1 transmits the workpiece, the outer frame seat 2 will not interfere with the workpiece;

[0054] The transmission belt 1, lifting unit and outer frame seat 2 are all fixed to the ground by supporting feet;

[0055] An X-direction linear drive unit, the X-direction linear drive unit comprising two sets of X-direction linear positioners 3 fixed to the top surface of the outer frame seat 2 in the longitudinal direction;

[0056] A Y-axis linear drive unit, comprising a base plate 4 on which a set of Y-axis linear positioners 5 are fixed;

[0057] Each set of the X-axis linear positioners 3 and each set of the Y-axis linear positioners 5 are composed of two sets of electric linear slides 6 with two sliders; the screw threads of the two sliders of the electric linear slides 6 are in opposite directions, and when the electric linear slides 6 are in motion, the two sliders move closer to or away from each other;

[0058] The screw locking module includes a Z-direction screw locking device 7 fixed to one slider of the Y-direction linear positioner 5, an X-direction screw locking device 8 fixed to the other slider of the Y-direction linear positioner 5, and a Y-direction screw locking device 9 fixed to one slider of the X-direction linear positioner 3. The base plate 4 is fixed to the other sliders of the two facing X-direction linear positioners 3. The Z-direction screw locking device 7 is used to accurately control the height of the screws in the vertical direction.

[0059] The screw feeding unit 10 has a discharge end connected to the screw clamping nozzle 34 of the screw locking module through a blow pipe. The screw feeding unit 10 realizes orderly feeding of screws. The screw feeding unit 10 sequentially delivers the screws to the screw clamping nozzle 34 through components such as a vibrating plate and a linear feeder, ensuring continuous and stable feeding, avoiding interruptions in locking, and improving equipment operation efficiency.

[0060] The workpiece positioning unit includes an end positioning unit and a side positioning unit; the end positioning unit can be used to position the end of the lifted workpiece, and the side positioning unit can be used to limit the side of the workpiece.

[0061] The lifting and jacking unit includes a lifting receiving platform 11, the lifting receiving platform 11 includes two longitudinal profiles, a plurality of transverse profiles are fixed between the two longitudinal profiles, the transverse profiles are flush with the top surfaces of the longitudinal profiles, the longitudinal profiles and the transverse profiles are installed to be fixed with a lifting seat plate 12, the bottom of the lifting seat plate 12 is fixed to the piston rod of the first lifting cylinder 13, the first lifting cylinder 13 is fixed to the adjustment seat plate 22; the adjustment seat plate 22 is fixed to the support legs; the height limiter includes a guide fixed to the adjustment seat plate 22 The guide bearing has a limit column 14 slidingly arranged on the inner side of the guide bearing, and the upper and lower parts of the limit column 14 are provided with threaded sections, and a first limit nut 15 is screwed on; the top of the limit column 14 is fixed to the jacking seat plate 12; when working, the pull-up height of the limit column 14 can be adjusted by rotating the first limit nut 15; when the first lifting cylinder 13 drives the lifting and receiving platform 11 to move upward in a straight line through the jacking seat plate 12, the upward height is limited by the first limit nut 15 and the adjusting seat plate 22, and the rising height of the lifting and receiving platform 11 can be accurately controlled.

[0062] The limiting column 14 is fixed to the lifting seat plate 12 via a flange; a grating ruler is provided between the limiting column 14 and the adjusting seat plate 22, and the lifting height can be accurately captured by the grating ruler.

[0063] The support seats 35 of the X-axis screw locking device 8 and the Y-axis screw locking device 9 are both fixed to the box seats 16 with hollow ends, and the outside of the box seat 16 is fixed with a hanging seat 17 by locking bolts, and the support seat 35 or the box seat 16 is provided with a long hole in the screw locking direction; the long hole and the hanging seat 17 are fixed by locking bolts; the hanging seat 17 is fixed to the slider of the electric linear slide 6; when in use, the support seats 35 of the X-axis screw locking device 8 and the Y-axis screw locking device 9 are slid and adjusted on the box seat 16, and the position is locked after adjustment, or the box seat 16 and the hanging seat 17 are slid and adjusted, and the position is locked after adjustment, so that the locking spacing of the X-axis screw locking device 8 and the Y-axis screw locking device 9 on the workpiece can be adjusted according to the width of the workpiece.

[0064] The end positioning unit includes a frame-shaped support plate 18, and the support plate 18 is attached to the limit plate 19 on the side away from the Y-axis linear positioner 5. The limit plate 19 is fixed with an adjusting screw 20 and a plurality of first adjusting slides 21, and the adjusting screw 20 and the first adjusting slide 21 are movable through the support plate 18; the adjusting screw 20 and the first adjusting slide 21 are lower than the bottom of the Y-axis linear positioner 5; the adjusting screw 20 is screwed with a second limiting nut 23 on both sides of the support plate 18; the support plate 18 is fixed to the middle of the Y-axis linear positioner 5 or fixed to the support foot by a second lifting cylinder; the end positioning unit can be directly fixed to the middle of the Y-axis linear positioner 5 or the second lifting cylinder; the support plate 18 can be driven to rise and fall by the second lifting cylinder to limit the end of the workpiece; when the limit position is adjusted, the distance between the limit plate 19 and the Y-axis linear positioner 5 is adjusted by rotating the second limiting nut 23.

[0065] The side positioning unit includes a horizontal slot seat 24, and a side push cylinder 25 is fixed on the inner side of the horizontal slot seat 24, and the piston rod of the side push cylinder 25 movably passes through the horizontal slot seat 24 and is fixed to the side push plate 26; two side adjustment screws 27 are also fixed on the side push plate 26, and the side adjustment screws 27 movably pass through the horizontal slot seat 24 and are screwed with a third limit nut 28; the horizontal slot seat 24 is fixed to the side of the Y-direction locking screw device 9 or is fixed to the support leg through the third lifting cylinder 29; the horizontal slot seat 24 can be driven to rise and fall by the third lifting cylinder 29, or the horizontal slot seat 24 can be directly fixed to the side of the Y-direction locking screw device 9, and then, the side push plate 26 is driven to be pushed outward by the side push cylinder 25, and the outward push distance is limited by the third limit nut 28. At this time, the lifted workpiece is positioned in the length direction by the side push cylinder 25.

[0066] The Z-direction screw locking device 7 includes a Z-direction electric slide 30 fixed on a slider of the Y-direction linear positioner 5, and a lifting slide 31 is fixed to the sliding end of the Z-direction electric slide 30, and a first locking screw cylinder 32 is fixed on the lifting slide 31, and a first electric screwdriver 33 is fixed to the movable end of the first locking screw cylinder 32; a screw bit is installed on the rotating end of the first electric screw driver 33, and a screw clamp 34 is fixed on the lifting slide 31 opposite the screw bit; the Z-direction electric slide 30 can drive the screw clamp 34 to descend to the locking position, and drive the first electric screw driver 33 downward through the first locking screw cylinder 32 to send the screw into the locking hole and complete the locking; the Z-direction screw locking device 7 is used for precise control of the vertical screw locking height, and cooperates with the Z-direction electric slide 30 to adjust the position of the screw locking gun in the vertical direction to ensure that the locking height of the vertical surface of the workpiece (such as the upper and lower edges of the side) meets the process standards and improves the vertical locking quality.

[0067] The X-direction screw locking device 8 and the Y-direction screw locking device 9 both include a support seat 35, a wire locking guide rail 36 is fixed to the front side of the support seat 35, a nozzle slider 37 and an electric screwdriver slider 38 are slidably provided on the wire locking guide rail 36, the nozzle slider 37 is movable through the limiting bolt and is screwed to the electric screwdriver slider 38, a second electric screwdriver 39 is fixed to the electric screwdriver slider 38; a screw nozzle 34 is fixed to the nozzle slider 37; the screw head of the second electric screwdriver 39 is arranged opposite to the screw nozzle 34; the limiting bolt is sleeved with a spring body 40 between the nozzle slider 37 and the electric screwdriver slider 38; a second locking screw cylinder 41 is fixed to the rear side of the support seat 35; the piston rod of the second locking screw cylinder 41 is fixed to the electric screwdriver slider 38. The second locking screw cylinder 41 is used as the power source to provide stable horizontal power for the second electric screwdriver 39, so that the screws are stably delivered to the screw locking module; when working, the second locking screw cylinder 41 drives the electric screwdriver slider 38 to slide along the wire locking guide rail 36, and is pushed by the spring body 40 to drive the clamping nozzle slider 37 forward. When the screw clamping nozzle 34 of the clamping nozzle slider 37 reaches the limit end of the wire locking guide rail 36, as the screw bit of the second electric screwdriver 39 moves forward, the screw can be stably delivered into the locking hole of the workpiece and the locking work is completed.

[0068] A working method of an automatic screw locking device, using the automatic screw locking device, the method is as follows:

[0069] S1, obtain the workpiece locking hole position and associated data. First, measure the position of the locking hole W1 in the length direction of the workpiece and the locking hole W2 on the top surface. Second, calculate the thickness distance D1 from the center point of the locking hole W1 in the length direction of the workpiece and the locking hole W3 in the width direction of the workpiece to the bottom surface of the workpiece. Then, calculate the X-axis distance x1 between the center point of the locking hole W1 in the length direction of the workpiece and the center point of the locking hole W2 on the top surface. Next, obtain the position of the locking hole W3 in the width direction of the workpiece and the locking hole W2 on the top surface. And calculate the Y-axis distance y1 between the center point of the locking hole W3 in the width direction of the workpiece and the center point of the locking hole W2 on the top surface.

[0070] S2, screw locking adaptation setting, first, the device controller obtains the X-axis spacing x1 obtained in S1, and subtracts the fixed deviation value of the screw locking device (the space occupied by the screw locking device and the Y-axis linear positioner 5) from the X-axis spacing x1; obtains the first adjustment spacing; the device controller controls the X-axis linear positioner 3 to rotate forward or reverse, so that the two sliders move closer to or away from each other, to achieve the response of the first adjustment spacing; at this time, the X-axis screw locking device 8 is facing the center point of the locking hole in the length direction of the workpiece; at the same time, the center point of the locking hole on the top surface of the workpiece is consistent with the Z-axis screw locking device 7 in the X-axis position; then, the device controller obtains the Y-axis spacing y ... The fixed deviation value of the screw locking device (the deviation between the installation and calibration position of the screw locking device) is subtracted from the spacing y1 to obtain the second adjustment spacing; the device controller controls the Y-axis linear positioner 5 to achieve the response of the second adjustment spacing; at this time, the Y-axis screw locking device 9 is facing the center point of the screw hole in the width direction of the workpiece; at the same time, the center point of the screw hole on the top surface of the workpiece is facing the center point of the Z-axis screw locking device 7; finally, the device controller obtains the thickness spacing D1 obtained by S1, calculates the difference between the thickness spacing D1 and the initial thickness value, obtains the correction value, and sums the correction value with the initial screw locking travel distance of the Z-axis screw locking device 7 to obtain the travel distance of the Z-axis screw locking device 7;

[0071] S3, positioning adaptability setting, first adjust the height limiter so that the horizontal plane of the center of the screw hole in the length direction and the width direction of the workpiece coincides with the horizontal plane of the bit axis of the X-axis screw locking device 8 and the Y-axis screw locking device 9;

[0072] Since the distance between the sliding end of the electric linear slide 6 and the end positioning unit and the side positioning unit will inevitably change after the electric linear slide 6 responds according to the first adjustment distance and the second adjustment distance, it is necessary to initialize the positioning of the workpiece by the end positioning unit and the side positioning unit; then, the stroke of the end positioning unit and the side positioning unit is adjusted so that the bit axis of the X-axis screw locking device 8 and the Y-axis screw locking device 9 is aligned with the center point of the screw hole in the length direction and the width direction of the workpiece;

[0073] S4, screw locking, the workpiece to be locked is transported by the transmission belt 1. When the workpiece moves to the top of the lifting and jacking unit, the lifting and jacking unit performs the jacking action. Then, the workpiece positioning unit limits the workpiece. At the same time, the screw clamping nozzle 34 of the screw locking module receives the screws delivered by the screw feeding unit 10. Then, the screw locking module is activated to lock the screws into the various locking holes on each surface of the workpiece. After the locking is completed, the lifting and jacking unit is reset, and the workpiece that has been locked falls onto the transmission belt 1, and the transmission belt 1 sends it to the next workstation.

[0074] A comparison table is established for each of the thickness spacing D1, X-direction spacing x1 and Y-direction spacing y1, respectively. The comparison table includes a thickness spacing D1-height limiter adjustment spacing association table, an X-direction spacing x1-end positioning unit adjustment spacing association table, and a Y-direction spacing y1-side positioning unit adjustment spacing association table; when S1 obtains the workpiece locking hole position and associated data, the adjustment spacing data can be directly obtained.

[0075] The above embodiments are only preferred implementations of the present invention. Therefore, any equivalent changes or modifications made according to the structures, features and principles described in the scope of application of the present invention are included in the scope of application of the present invention.

Claims

1. An automatic screw locking device, characterized in that: include: Equipment controller for whole machine control; A transmission belt, wherein the transmission belt is fixed to the ground via supporting legs; A lifting unit is provided on the inner side of the transmission belt, and a height limiter is fixed to the lifting end of the lifting unit; An outer frame seat, the outer frame seat is arranged outside the transmission belt and is lower than the top surface of the transmission belt; The transmission belt, lifting unit and outer frame seat are all fixed to the ground by supporting feet; An X-axis linear drive unit, comprising two sets of X-axis linear positioners fixed to the top surface of the outer frame seat in the longitudinal direction; A Y-axis linear drive unit, the Y-axis linear drive unit comprising a base plate, a set of Y-axis linear positioners being fixed on the base plate; Each set of the X-axis linear positioners and each set of the Y-axis linear positioners are composed of two sets of double-slider electric linear slides; A screw locking module, comprising a Z-direction screw locking device fixed to one slider of the Y-direction linear positioner, and an X-direction screw locking device fixed to the other slider of the Y-direction linear positioner, and further comprising a Y-direction screw locking device fixed to one slider of the X-direction linear positioner, wherein the base plate is fixed to the other slider of the two facing X-direction linear positioners; A screw feeding unit, wherein the discharge end of the screw feeding unit is connected to the screw clamping nozzle of the screw locking module through a blow pipe; The workpiece positioning unit includes an end positioning unit and a side positioning unit.

2. The automatic screw locking device according to claim 1, characterized in that: The lifting and jacking unit includes a lifting and receiving platform, which includes two longitudinal profiles, and multiple transverse profiles are fixed between the two longitudinal profiles. The top surfaces of the transverse profiles and the longitudinal profiles are flush, and the longitudinal profiles and the transverse profiles are installed to be fixed with a lifting seat plate. The bottom of the lifting seat plate is fixed to the piston rod of the first lifting cylinder, and the first lifting cylinder is fixed to the adjustment seat plate; the adjustment seat plate is fixed to the support leg; the height limiter includes a guide bearing that is embedded and fixed with the adjustment seat plate, and a limiting column is slidably arranged on the inner side of the guide bearing. The upper and lower parts of the limiting column are provided with threaded sections, and a first limiting nut is screwed on; the top of the limiting column is fixed to the lifting seat plate.

3. The automatic screw locking device according to claim 2, characterized in that: The limiting column and the lifting seat plate are fixed via a flange; a grating ruler is arranged between the limiting column and the positioning seat plate.

4. The automatic screw locking device according to claim 1, characterized in that: The support bases of the X-direction screw locking device and the Y-direction screw locking device are both fixed to the box base with hollow ends. The outside of the box base is fixed with a hanging base by locking bolts. The box base has a long hole in the screw locking direction; the long hole and the hanging base are fixed by locking bolts; the hanging base is fixed to the slider of the electric linear slide.

5. The automatic screw locking device according to claim 1, characterized in that: The end positioning unit includes a frame-shaped support plate, which is attached to a limit plate on the side away from the Y-axis linear positioner. An adjusting screw and multiple first adjusting slides are fixed on the limit plate, and the adjusting screw and the first adjusting slide move through the support plate; the adjusting screw and the first adjusting slide are lower than the bottom of the Y-axis linear positioner; the adjusting screw is screwed with a second limit nut on both sides of the support plate; the support plate is fixed to the middle of the Y-axis linear positioner or fixed to the support leg through a second lifting cylinder.

6. The automatic screw locking device according to claim 1, characterized in that: The side positioning unit includes a horizontal slot seat, a side push cylinder is fixed on the inside of the horizontal slot seat, the piston rod of the side push cylinder movably passes through the horizontal slot seat and is fixed to the side push plate; two side adjustment screws are also fixed on the side push plate, the side adjustment screws movably pass through the horizontal slot seat and are screwed with a third limit nut; the horizontal slot seat is fixed to the side of the Y-direction locking screw device or fixed to the support leg through a third lifting cylinder.

7. The automatic screw locking device according to claim 1, characterized in that: The Z-direction screw locking device includes a Z-direction electric slide fixed on a slider of a Y-direction linear positioner, a lifting slide is fixed to the sliding end of the Z-direction electric slide, a first screw locking cylinder is fixed on the lifting slide, a first electric screwdriver is fixed to the movable end of the first screw locking cylinder; a screw bit is installed on the rotating end of the first electric screwdriver, and a screw clamp is fixed on the lifting slide opposite the screw bit.

8. The automatic screw locking device according to claim 1, characterized in that: The X-direction screw locking device and the Y-direction screw locking device both include a support seat, a wire locking guide rail is fixed to the front side of the support seat, a nozzle slider and an electric screw driver slider are slidably provided on the wire locking guide rail, the nozzle slider moves through the limiting bolt and is screwed to the electric screw driver slider, a second electric screw driver is fixed on the electric screw driver slider; a screw nozzle is fixed on the nozzle slider; the screw head of the second electric screw driver is arranged opposite to the screw nozzle; the limiting bolt is sleeved with a spring body between the nozzle slider and the electric screw driver slider; a second screw locking cylinder is fixed to the rear side of the support seat; the piston rod of the second screw locking cylinder is fixed to the electric screw driver slider.

9. A method for operating an automatic screw locking device, using the automatic screw locking device according to any one of claims 1 to 8, characterized in that: The method is specifically as follows: S1, obtain the workpiece locking hole position and related data, first measure the position of the locking hole in the length direction of the workpiece and the locking hole on the top surface; secondly, calculate the thickness distance from the center point of the locking hole in the length direction and the width direction of the workpiece to the bottom surface of the workpiece, then calculate the X-axis distance between the center point of the locking hole in the length direction of the workpiece and the center point of the locking hole on the top surface; then, obtain the position of the locking hole in the width direction of the workpiece and the locking hole on the top surface; and calculate the Y-axis distance between the center point of the locking hole in the width direction of the workpiece and the center point of the locking hole on the top surface; S2, screw locking adaptation setting, first, the device controller obtains the X-axis spacing obtained in S1, and subtracts the fixed deviation value of the screw locking device from the X-axis spacing to obtain the first adjustment spacing; the device controller controls the X-axis linear positioner to rotate forward or reverse, so that the two sliders move closer to or away from each other, to achieve the response of the first adjustment spacing; at this time, the X-axis screw locking device is facing the center point of the locking hole in the length direction of the workpiece; at the same time, the center point of the locking hole on the top surface of the workpiece is consistent with the X-axis position of the Z-axis screw locking device; then, the device controller obtains the Y-axis spacing obtained in S1, and subtracts the Y-axis spacing The fixed deviation value of the screw locking device is removed; the second adjustment spacing is obtained; the device controller controls the Y-axis linear positioner to achieve the response of the second adjustment spacing; at this time, the Y-axis screw locking device is facing the center point of the screw hole in the width direction of the workpiece; at the same time, the center point of the screw hole on the top surface of the workpiece is facing the center point of the Z-axis screw locking device; finally, the device controller obtains the thickness spacing obtained in S1, calculates the difference between the thickness spacing and the initial thickness value, obtains the correction value, and sums the correction value with the initial screw locking travel distance of the Z-axis screw locking device to obtain the travel distance of the Z-axis screw locking device; S3, Positioning adaptability setting: First, adjust the height limiter so that the horizontal plane of the center of the screw hole in the length and width directions of the workpiece coincides with the horizontal plane of the bit axis of the X-axis screw locking device and the Y-axis screw locking device. Next, adjust the stroke of the end positioning unit and the side positioning unit so that the bit axis of the X-axis screw locking device and the Y-axis screw locking device are aligned with the center of the screw hole in the length and width directions of the workpiece. S4, screw locking, the workpiece to be locked is transported by the transmission belt. When the workpiece moves to the top of the lifting and jacking unit, the lifting and jacking unit performs the jacking action. Then, the workpiece positioning unit limits the workpiece. At the same time, the screw clamp of the screw locking module receives the screws sent by the screw feeding unit. Then, the screw locking module is activated to lock the screws into the various locking holes on each surface of the workpiece. After the locking is completed, the lifting and jacking unit is reset, and the workpiece that has been locked falls onto the transmission belt, and the transmission belt sends it to the next station.

10. The working method of the automatic screw locking device according to claim 9, characterized in that: A comparison table is established for each of the thickness spacing, X-direction spacing and Y-direction spacing, respectively. The comparison table includes a thickness spacing-height limiter adjustment spacing association table, an X-direction spacing-end positioning unit adjustment spacing association table, and a Y-direction spacing-side positioning unit adjustment spacing association table; when S1 obtains the workpiece locking hole position and associated data, the adjustment spacing data can be directly obtained.

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