FDS tightening gun

Abstract

The invention discloses an FDS tightening gun. The FDS tightening gun comprises a feeding device and a pressing device. The feeding device comprises a first air cylinder, a first supporting plate and a first sliding assembly. The pressing device comprises a second air cylinder, a nail feeding assembly, a third connecting plate and a second sliding assembly. The first air cylinder and the second air cylinder are located between the first sliding assembly and the second sliding assembly and close to the mass center of the tightening gun. The first supporting plate is connected with the first air cylinder and fixedly connected with a fourth air cylinder and a cutter bar support. The cutter bar support is fixedly connected with the first sliding assembly and the second sliding assembly at the same time, and the third connecting plate is connected with the second air cylinder and fixedly connected with the second sliding assembly at the same time. The nail feeding assembly is fixedly connected to one side of the third connecting plate, and the fourth air cylinder is arranged on the other side of the third connecting plate. The air cylinder is arranged in the middle of the whole tightening gun, so that the structure is compact, and a workpiece is stressed more uniformly.

Description

Technical Field

[0001] The invention relates to the field of FDS flow drill screw tightening, in particular to an FDS tightening gun. Background Art

[0002] In order to reduce the weight of the car body, the car body materials have also begun to develop in a diversified direction, such as using carbon fiber, aluminum and other materials as body materials. With the increasing application of aluminum plates in mid-to-high-end cars, the connection technology of steel-aluminum hybrid bodies is also being continuously applied and improved for the application of multi-material bodies. Among them, FDS (Flow Drill Screw, flow drill screw technology, or hot melt self-tapping riveting technology) connection technology is widely used in the manufacturing of steel and aluminum bodies of new energy vehicles. This technology is a cold forming technology that transmits the high-speed rotation of the motor to the workpiece through the tool rod assembly, and the friction between the threaded nail and the workpiece causes the workpiece to produce plastic deformation, and then self-tapping and screwing. The use of industrial robots equipped with FDS tightening guns to achieve automatic FDS riveting has become an essential connection solution for lightweight body and new energy body manufacturing.

[0003] The general FDS tightening gun mainly uses multiple sets of cylinders and multiple sets of linear guides to complete the stroke movement. However, in order to ensure stability during the movement, one cylinder is usually matched with two linear guides, which makes the internal structure of the tightening gun complex and occupies a large space. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides an FDS tightening gun; in the tightening gun, a cylinder is arranged in the middle position of the overall tightening gun, so that the structure is compact and the force on the workpiece is more uniform.

[0005] The present invention is achieved through the following technical solutions:

[0006] An FDS tightening gun comprises a feeding device and a clamping device; the feeding device comprises a first cylinder, a first supporting plate and a first sliding assembly, the clamping device comprises a second cylinder, a nail feeding assembly, a third connecting plate and a second sliding assembly, the first cylinder and the second cylinder are located between the first sliding assembly and the second sliding assembly and close to the center of mass of the tightening gun, the first supporting plate is connected to the first cylinder and is fixedly connected to a fourth cylinder and a knife bar bracket, the knife bar bracket is fixedly connected to the first sliding assembly and the second sliding assembly at the same time, the third connecting plate is connected to the second cylinder and is fixedly connected to the second sliding assembly at the same time, the nail feeding assembly is fixedly connected to one side of the third connecting plate, and the fourth cylinder is arranged on the other side of the third connecting plate.

[0007] Further, the first cylinder is located above the fourth cylinder.

[0008] Furthermore, the clamping device also includes a stop bolt, which is fixedly connected to the third connecting plate.

[0009] Further, the fourth cylinder includes a fourth piston rod, and the fourth piston rod is aligned with the stop bolt in the vertical direction.

[0010] Furthermore, the first sliding assembly includes a pair of first guide pillars, and the pair of first guide pillars are symmetrically arranged on both sides of the first cylinder.

[0011] Furthermore, the second sliding assembly includes a pair of second guide pillars, and the pair of second guide pillars are symmetrically arranged on both sides of the second cylinder.

[0012] Furthermore, the first sliding assembly also includes a first slider slidably connected to the first guide column, the second sliding assembly also includes a second slider slidably connected to the second guide column, and the knife rod bracket is fixedly connected to the first slider and the second slider at the same time.

[0013] Furthermore, the second sliding assembly also includes a third sliding block slidably connected to the second guide post, and the third sliding block is located below the second sliding block and fixedly connected to the third connecting plate.

[0014] Furthermore, the feeding device also includes a tool rod assembly fixedly connected to the tool rod bracket, and the tightening gun also includes a power device, which is fixedly connected to the tool rod assembly.

[0015] Furthermore, the knife bar assembly is arranged below the power device, and the nail feeding assembly is arranged below the knife bar assembly.

[0016] Compared with the prior art, the advantages of the present invention are:

[0017] 1. By arranging the first cylinder just above the fourth cylinder and arranging the second cylinder and the third cylinder between the first sliding assembly and the second sliding assembly, the internal structure of the tightening gun is compact and the volume is small.

[0018] 2. The structure is made more compact by installing the stop bolt on the third connecting plate fixedly connected to the second cylinder and arranging the fourth cylinder just above the stop bolt.

[0019] 3. By fixedly connecting the knife bar bracket to the first sliding assembly and the second sliding assembly at the same time, the knife bar bracket makes the knife bar assembly more stable when it drives the knife bar assembly to move.

[0020] 4. The knife bar bracket and the nail feeding assembly share the second sliding assembly, which reduces the number of guide rails used, makes the structure simpler, and also saves costs.

[0021] 5. By setting multiple cylinders in the middle position of the tightening gun and the mass center of the entire gun body close to the gun head, the workpiece is subjected to more uniform force. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A three-dimensional assembly diagram of a tightening gun according to an embodiment of the present invention;

[0023] Figure 2 A partial assembly diagram of a tightening gun according to an embodiment of the present invention;

[0024] Figure 3 A partial exploded view of a tightening gun according to an embodiment of the present invention;

[0025] Figure 4 A partial assembly diagram of a feeding device and a pressing device according to an embodiment of the present invention;

[0026] Figure 5 Another partial assembly diagram of a feeding device and a pressing device according to an embodiment of the present invention;

[0027] Figure 6 An exploded view of a knife bar assembly according to an embodiment of the present invention;

[0028] Figure 7 A three-dimensional assembly diagram of a clamping device according to an embodiment of the present invention;

[0029] Figure 8 It is a three-dimensional assembly diagram of a nail feeding assembly according to an embodiment of the present invention;

[0030] Fig. 9 An exploded view of a nail feeding assembly according to an embodiment of the present invention;

[0031] Fig.10 A cross-sectional view of a nail insertion assembly according to an embodiment of the present invention;

[0032] Fig.11 It is a three-dimensional assembly diagram of a feeding device according to an embodiment of the present invention;

[0033] Fig.12 is a partial assembly diagram of a fourth sensor according to an embodiment of the present invention;

[0034] Fig.13 The figure is a circuit diagram of a tightening gun head according to an embodiment of the present invention.

[0035] Explanation of reference numerals: 1. power device; 10. motor; 100. servo controller; 11. screw shaft; 2. feeding device; 20. first cylinder; 200. first piston rod; 21. tool rod bracket; 210. first support plate; 211. second support plate; 22. tool rod assembly; 220. tool rod; 221. quick-change bushing; 222. first sensor; 223. tool head; 224. guide tube; 225. quick-change head; 23. fourth cylinder; 230. fourth piston rod; 24. first sliding assembly; 240. first guide column; 241. first slide block; 25. first a connecting plate; 3, a clamping device; 30, a second cylinder; 300, a second piston rod; 32, a second sliding assembly; 320, a second guide column; 321, a second slider; 322, a third slider; 33, a stop bolt; 330, a bracket; 340, a second connecting plate; 341, a first boss; 342, a third connecting plate; 343, a first groove; 35, a first connecting block; 350, a second boss; 354, a fifth through hole; 36, a fourth connecting plate; 37, a fifth connecting plate; 370, a third groove; 4, a feeding device; 40, a feeding pipe; 41, a connecting pipe ; 410, blind hole; 42, third sensor; 420, eighth connecting plate; 43, third cylinder; 430, third piston rod; 44, seventh connecting plate; 5, nail feeding assembly; 50, threaded nail; 51, pressure plate; 52, pressure claw jaw block; 520, second groove; 53, knife bar guide groove; 530, sixth connecting plate; 531, third boss; 533, sixth through hole; 54, clamping claw arm; 55, pneumatic clamp; 550, second connecting block; 56, guide tube; 57, second sensor; 58, telescopic tube; 580, fixing pin; 581, spring; 582 , support block; 583, countersunk hole; 60, controller; 61, switch; 62, remote module; 621, first proximity switch; 622, second proximity switch; 623, third proximity switch; 624, fourth proximity switch; 625, fifth proximity switch; 626, first analog module; 267, second analog module; 63, host computer; 7, valve island; 8, fixing assembly; 80, first fixing plate; 800, first through hole; 801, second through hole; 802, third through hole; 81, second fixing plate; 82, third fixing plate; 9, fourth sensor. DETAILED DESCRIPTION

[0036] The following is a further non-restrictive detailed description of the technical solution of the invention in conjunction with the preferred embodiments and the accompanying drawings. In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings. In addition, the terms "first" and "second" are used only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and cannot be understood as limitations on the present invention.

[0037] like Figure 1 As shown, a tightening gun according to an embodiment of the present invention comprises a fixing assembly 8 and a power device 1, a feeding device 2, a pressing device 3 and a feeding device 4 respectively fixedly connected to the fixing assembly 8.

[0038] like Figure 2 and Figure 3 As shown, the power device 1 includes a motor 10 and a screw shaft 11, and the fixing assembly 8 includes a first fixing plate 80; the bottom of the motor 10 is fixedly connected to the first fixing plate 80 by screws, and a first through hole 800 is opened on the first fixing plate 80, and the motor 10 passes through the first through hole 800 and is fixedly connected to the screw shaft 11 through a coupling.

[0039] The feeding device 2 includes a first cylinder 20, a first support plate 210 and a first sliding assembly 24. Among them, a first proximity switch 621 for detecting the movement stroke is installed on the first cylinder 20, and a fourth proximity switch 624 for detecting the movement stroke is installed on the fourth cylinder 23. The first support plate 210 is connected to the first cylinder 20 and is fixedly connected to the fourth cylinder 23 and the tool rod bracket 21. The first cylinder 20 is located above the fourth cylinder 23. Specifically, the bottom of the first cylinder 20 is fixedly connected to the first fixing plate 80 by screws; the first piston rod 200 of the first cylinder 20 passes through the second through hole 801 opened in the first fixing plate 80, and is fixedly connected to the first connecting plate 25 by screws. The tool rod bracket 21 includes a first support plate 210 and a pair of second support plates 211. The two ends of the first support plate 210 are fixedly connected to the second support plate 211 by screws respectively; the upper surface of the first support plate 210 is fixedly connected to the first connecting plate 25 by screws, and the lower surface of the first support plate 210 is fixedly connected to the fourth cylinder 23 by screws, and the structure is more compact.

[0040] The first sliding assembly 24 includes a pair of first guide posts 240 and a first slider 241 slidably connected to the first guide posts 240; the fixing assembly 8 also includes a second fixing plate 81 and a third fixing plate 82. The pair of first guide posts 240 are symmetrically arranged on both sides of the first cylinder 20 and are fixedly connected to the second fixing plate 81 and the third fixing plate 82 by screws, respectively, and the first slider 241 is fixedly connected to the second support plate 211 by screws.

[0041] like Figure 4 As shown, the feeding device 2 also includes a tool bar assembly 22 fixedly connected to the tool bar bracket 21. The tool bar assembly 22 is arranged below the power device and includes a tool bar 220, a quick-change bushing 221 and a first sensor 222. Corresponding to the preferred embodiment of the present invention, the first sensor 222 is preferably a torque sensor. The tool bar 220 includes a cutter head 223, a guide sleeve 224 and a quick-change head 225; the quick-change head 225 is matched with the quick-change bushing 221; the bottom connector 226 of the first sensor 222 is provided with an external thread 227, and the external thread 227 is matched with the internal thread 228 of the quick-change bushing 222. Both sides of the first sensor 222 are fixedly connected to the second support plate 211 by screws. The quick-change head 225 is adapted to the quick-change bushing 221. Only by replacing the tool bar 220 of different specifications with the same quick-change head 225, different types of threaded nails 50 can be processed, which is convenient and quick, and has strong adaptability.

[0042] like Figures 5 to 8As shown, the clamping device 3 includes a second cylinder 30, a nail feeding assembly 5, a third connecting plate 342 and a second sliding assembly 32. A second proximity switch 622 for detecting the movement stroke is installed on the second cylinder 30. The third connecting plate 342 is connected to the second cylinder 30 and is fixedly connected to the second sliding assembly 32. Specifically, the upper surface of the second cylinder 30 is fixedly connected to the first fixing plate 80 by screws, the second cylinder 30 includes a second piston rod 300, the second connecting plate 340 is sleeved on the second piston rod 300, and the first boss 341 of the second connecting plate 340 is engaged with the first groove 343 of the third connecting plate 342.

[0043] The second sliding assembly 32 includes a pair of second guide posts 320 and a second slider 321 and a third slider 322 slidably connected to the second guide posts 320. The pair of second guide posts 320 are symmetrically arranged on both sides of the second cylinder 30 and are fixedly connected to the second fixing plate 81 and the third fixing plate 82 by screws, respectively. The arbor support 21 is fixedly connected to the first sliding assembly 24 and the second sliding assembly 32 at the same time. Specifically, the second support plate 211 is fixedly connected to the first slider 241 and the second slider 321 by screws at the same time. The third slider 322 is located below the second slider 321, and the third slider 322 is fixedly connected to the third connecting plate 342 by screws.

[0044] The nail feed assembly 5 is fixedly connected to one side of the third connecting plate 342, and the fourth cylinder 23 is arranged on the other side of the third connecting plate 342. The front surface of the third connecting plate 342 is fixedly connected to the first connecting block 35 by screws. The nail feed assembly 35 is fixedly connected to the first connecting plate 35. The clamping device 3 also includes a stop bolt 33, and the stop bolt 33 is fixedly connected to the third connecting plate 342. Specifically, the stop bolt 33 is fixedly connected to the bracket 330 by screws, and the bracket 330 is fixedly connected to the rear surface of the third connecting plate 342 by screws. The fourth cylinder 23 includes a fourth piston rod 230. The fourth cylinder 23 is located above the stop bolt 33 and the fourth piston rod 230 is aligned with the stop bolt 33 in the vertical direction, which is used to ensure that the main stroke of the knife bar 220 after the engagement with the screw 50 and the feeding of the knife bar 220 are synchronized.

[0045] The first cylinder 20 and the second cylinder 30 are located between the first sliding assembly 24 and the second sliding assembly 32, and are close to the mass center M of the tightening gun. By arranging the first cylinder 20, the second cylinder 30 and the fourth cylinder 23 in the middle of the tightening gun, and the mass center M of the tightening gun is close to the nail feeding assembly 5 of the gun head, the workpiece is subjected to a relatively uniform force during operation.

[0046] The nail feeding assembly 5 includes a threaded nail 50, a clamping jaw block 52, a clamping jaw arm 54, a pneumatic clamp 55 and a second sensor 57. The front surface 351 of the second boss 350 of the first connecting block 35 is fixedly connected to the pneumatic clamp 55 by screws. A fifth proximity switch 625 for detecting the motion stroke is installed on the pneumatic clamp 55. The pneumatic clamp 55 includes a second connecting block 550, the clamping jaw arms 54 are symmetrically arranged on both sides of the pneumatic clamp 55, and are fixedly connected to the second connecting block 550 by screws, the surface of the pneumatic clamp 55 is fixedly connected to the fourth connecting plate 36 by screws, and the second sensor 57 is symmetrically arranged on both sides of the pneumatic clamp 55, and is fixedly connected to the fourth connecting plate 36 by screws. And the second sensor 57 is located directly above the clamping jaw arm 54. The clamp arm 54 is fixedly connected to the clamp jaw 52 by screws. A second groove 520 is provided on the clamp jaw 52. The second groove 520 forms a tapered hole for placing the threaded nail 50. The texture 500 of the threaded nail 50 is adapted to the inner texture 229 of the cutter head 223, and the cutter head 223 engages with the threaded nail 50.

[0047] The nail feeding assembly 5 is arranged below the knife bar assembly 22 and also includes a pressing plate 51 and a knife bar guide groove 53, and the clamping claw arms 54 are symmetrically arranged on both sides of the knife bar guide groove 53. The knife bar 220 is clearance-matched with the knife bar guide groove 53 and slides in the knife bar guide groove 53. The knife bar guide groove 53 includes a sixth connecting plate 530, and a third boss 531 is arranged on the sixth connecting plate 530. The side of the second boss 350 is fixedly connected to the fifth connecting plate 36 by screws, and the fifth connecting plate 37 is provided with a third groove 370. The third boss 531 abuts against the third groove 360, and the sixth connecting plate 530 is fixedly connected to the fifth connecting plate 37 by screws. The pressing plate 51 is fixedly connected to the bottom 532 of the sixth connecting plate 530 by screws, and the pressing plate 51 is preferably a circular ring structure, which has a larger contact area with the surface to be processed and a more uniform force.

[0048] The nail feeding assembly 5 also includes a guide tube 56, a telescopic tube 58, a spring 581 and a support block 582. The guide tube 56 can abut against the telescopic tube 58, and the telescopic tube 58 can be connected to the knife bar guide groove 53. One end of the spring 581 is detachably accommodated in the telescopic tube 58, and the other end is detachably mounted on the support block 582. The knife bar 220 is movably accommodated in the knife bar guide groove 23. When the knife bar 220 moves downward, the telescopic tube 58 is in a stressed state, and the telescopic tube 58 is withdrawn from the knife bar guide groove 53 and compresses the spring 581 after receiving the downward pressure of the knife bar 220; when the knife bar moves upward, the telescopic tube 58 is in a non-stressed state, and the restoring force of the spring 581 drives the telescopic tube 58 to enter the knife bar guide groove 53.

[0049] Specifically, a fifth through hole 354 is provided on the first connection block 35, and the conduit 56 passes through the fifth through hole 354 and is connected to the telescopic tube 581. A fourth groove 532 is provided on the sixth connection plate 530, and a sixth through hole 533 is provided on the inner wall of the fourth groove 532. One end of the telescopic tube 58 is movably received in the sixth through hole, and the telescopic tube 580 is fixedly connected to the fifth connection plate 37 by a fixing pin 580. A countersunk hole 583 is provided on the telescopic tube 58, and one end of the spring 581 is detachably received in the countersunk hole 583, and the other end is detachably installed in the support block 582; the support block 582 is detachably fixedly connected to the fifth connection plate 37 by a screw, and has a simple structure and is easy to disassemble.

[0050] The telescopic tube 58 includes a first end 584 and a second end 585. In the unstressed state, the first end 584 is located in the knife bar guide groove 53, the second end 585 abuts against the edge of the sixth through hole 533, and the telescopic tube 58 is connected to the knife bar guide groove 53. The edge of the telescopic tube 58 abuts against the edge of the conduit 56, and the telescopic tube 58 is connected to the conduit 56. The screw 50 passes through the conduit 56 and enters the bottom of the knife bar guide groove 53 from the telescopic tube 581, and finally reaches the second groove 520 of the clamp jaw 52. In the stressed state, the first end 584 abuts against the knife bar 220, and the second end 585 is staggered from the edge of the sixth through hole 533. The edge of the telescopic tube 58 is staggered from the edge of the conduit 56.

[0051] like Fig. 9 As shown, the feeding device 4 includes a feeding pipe 40, a connecting pipe 41, a third sensor 42 and a third cylinder 43. The feeding pipe 40 is connected to a feeder (not shown in the figure). The feeding pipe 40 is sleeved with a seventh connecting plate 44, and a third through hole 802 is provided on the first fixed plate 80. The feeding pipe 40 passes through the third through hole 802, and the seventh connecting plate 44 is fixedly connected to the first fixed plate 80 by screws. The connecting pipe 41 is sleeved on the feeding pipe 40 and fixedly connected to the third cylinder 43 by screws. A blind hole 410 is provided on the connecting pipe 41, and the blind hole 410 is matched with the third piston rod 430 of the third cylinder 43, and the third piston rod 430 can slide in the blind hole 410. The third sensor 42 is sleeved on the feeding pipe 40 and fixedly connected to the eighth connecting plate 420 by screws, and the eighth connecting plate 420 is fixedly connected to the cylinder body 431 of the third cylinder 43 by screws. Corresponding to the preferred embodiment of the present invention, the third sensor 42 is preferably an inductive sensor.

[0052] like Fig.10As shown, a tightening gun head according to an embodiment of the present invention further includes a fourth sensor 9, a controller 60, a switch 61 and a valve island 7. Corresponding to a preferred embodiment of the present invention, the fourth sensor 9 is preferably a displacement sensor. The fourth sensor 9 is fixedly connected to the second support plate 211 by screws, the valve island 7 is fixedly connected to the third fixed plate 82 by screws, and the controller 60 and the switch 61 are arranged in an electrical cabinet (not shown in the figure). The valve island 7 adopts the existing technology, so its specific structure is not described here. Corresponding to a preferred embodiment of the present invention, the solenoid valve in the valve island 7 is preferably a proportional valve, and the feed force generated by the first cylinder 20 can be adjusted by adjusting the proportional valve.

[0053] like Fig.11 As shown, the tightening gun is also connected to a host computer 63. The host computer 63 is electrically connected to the switch 61 for displaying tightening status and data. The controller 60 is electrically connected to the switch 61, the switch 61 is electrically connected to the servo controller 100, the servo controller 100 is electrically connected to the motor 10, and controls the motor 10 to rotate, driving the knife bar assembly to rotate.

[0054] The switch 61 is electrically connected to the valve island 7, and the valve island 7 is electrically connected to the third cylinder 43, driving the third piston rod 430 to extend into the feed pipe 40, so as to stop the screw 50 from continuing to enter the conduit 56. The valve island 7 is electrically connected to the first cylinder 20, and drives the tool bar 220 to slide in the tool bar guide groove through the tool head bracket 21. The valve island 7 is electrically connected to the second cylinder 30, and is used to drive the nail feeding assembly 5 to perform a clamping action until the pressure plate 51 contacts the surface to be processed. The valve island 7 is electrically connected to the fourth cylinder 23, and controls the movement of the fourth piston rod 230 of the fourth cylinder 23. The fourth piston rod 230 contacts the stop bolt 33, indicating that the main stroke after the tool bar 220 is engaged with the screw 50 and the feed of the tool bar 220 are synchronized. The valve island 7 is electrically connected to the pneumatic clamper 55 and controls the switch of the pneumatic clamper 55. When the pneumatic clamper 55 is closed, the clamping jaw 52 is closed. When the clamper 55 is pneumatic, the clamping jaw arm 54 drives the clamping jaw 52 to open.

[0055] The tightening gun also includes a remote module 62. The switch 61 is also electrically connected to the remote module 62, and the remote module 62 is electrically connected to the first proximity switch 621 for detecting the movement stroke of the first cylinder 20. The remote module 62 is electrically connected to the second proximity switch 622 for detecting the movement stroke of the second cylinder 30. The remote module 62 is electrically connected to the third proximity switch 623 for detecting the movement stroke of the third cylinder 43. The remote module 62 is electrically connected to the fourth proximity switch 624 for detecting the movement stroke of the fourth cylinder 23. The remote module 62 is electrically connected to the fifth proximity switch 625 for detecting the movement stroke of the pneumatic gripper 55.

[0056] The tightening gun also includes a first analog module 626 and a second analog module 627. The remote module 62 is electrically connected to the first analog module 626, which is electrically connected to the first sensor 222, for detecting the torque generated by the motor 10 and transmitting it to the remote module 62. The remote module 62 is electrically connected to the second analog module 627, which is electrically connected to the fourth sensor 9, for detecting the stroke of the tool bar 220. The third sensor 42 is electrically connected to the remote module 62, for detecting the entry of the threaded screw 50 into the feed tube 40, and transmitting the signal to the remote module 62. The second sensor 57 is electrically connected to the remote module 62, and determines whether the clamping jaw 52 is open or closed by detecting different positions of the clamping jaw arm 54.

[0057] During operation, the feeder (not shown in the figure) delivers the threaded nail 50 to the feed pipe 40, the third sensor 42 detects the signal of the threaded nail 50, and transmits the signal to the sensor 6, and the valve island 7 controls the third cylinder 43 to open the feed pipe 40; after the threaded nail 50 passes through the conduit 56 and reaches the second groove 520 of the clamping jaw 52, ​​the valve island 7 controls the third cylinder 43 to stop the feed pipe 40 again. The first cylinder 20 drives the tool rod 220 to move through the tool head bracket 21 until the tool head 220 contacts the upper surface of the threaded nail 50; the motor 10 drives the tool rod 220 to rotate until the tool head 223 engages with the threaded nail 50. At this time, the first cylinder 20 and the second cylinder 30 respectively drive the tool head bracket 21 and the nail feeding assembly 5 to move downward at the same time until the pressure plate 51 contacts the surface to be processed. When the tip 501 of the screw 500 contacts the surface to be processed, the speed of the motor 10 increases, and the feed force of the first cylinder 20 increases; at the same time, the pneumatic clamp 57 is turned on, the clamp arm 54 drives the clamp jaw 52 to open, and the tool head bracket 21 drives the tool rod 220 to continue to move downward and tighten the screw 50 with the set torque. At this time, the tightening process ends and all cylinders return to the origin.

[0058] A tightening gun according to an embodiment of the present invention is provided with a first cylinder 20 arranged directly above the fourth cylinder 23, and the second cylinder 30 and the fourth cylinder 23 arranged between the first sliding assembly 24 and the second sliding assembly 32, so that the internal structure of the tightening gun is compact and the volume is small. The stop bolt 33 is installed on the third connecting plate 342 fixedly connected to the second cylinder 30, and the fourth cylinder 23 is arranged directly above the stop bolt 33, so that the structure is more compact. The arbor bracket 21 is fixedly connected to the first sliding assembly 24 and the second sliding assembly 32 at the same time, so that the arbor bracket 21 is more stable when driving the arbor assembly 22 to move. The arbor bracket 21 and the nail feeding assembly 5 share the second sliding assembly 32, so that the number of guide rails used is reduced, the structure is simpler, and the cost is also saved. By using the second sensor 57 to detect the different positions of the clamping jaw 54 to determine whether the clamping jaw 52 is open or closed, the detection is more accurate and the safety during operation is higher. The quick-change head 225 is adapted to the quick-change bushing 221. Only by replacing the tool bar 220 of different specifications with the same quick-change head 225, the processing of different types of threaded nails 50 can be achieved, which is convenient, fast and highly adaptable. When the telescopic tube 58 is under stress, it withdraws from the tool bar guide groove 53 through the downward pressure of the tool bar 220 to prevent the threaded nail 50 from entering and getting stuck, and the structure is simple. When the telescopic tube 58 is not under stress, it is driven by the restoring force of the spring 581 to extend into the tool bar guide groove 53, so as to achieve the conduction between the conduit 56, the telescopic tube 58 and the tool bar guide groove 53, which is convenient for feeding and has a simple structure. By detachably accommodating one end of the spring 581 in the telescopic tube 58 and detachably mounting the other end on the support block 582, it is easy to disassemble when a nail is stuck. By setting the pressure plate 51 with a circular ring structure, the contact area is increased, the force is more uniform, and the indentation is reduced. By using the first sensor 222 to connect with the spiral shaft 11, the torque generated during the tightening process can be better monitored and detected, and the stability is improved. The motor 10 drives the cutter bar 220 to rotate at high speed to soften the connecting plate, and the plate to be connected is squeezed and screwed into the plate under the action of the huge feed force generated by the first cylinder 20, and finally a threaded connection is formed between the plate and the screw 50. In this process, no pre-drilling is required, and the production efficiency is high. The first sensor 222 and the fourth sensor 9 are used to monitor the torque and stroke generated during the tightening process to improve stability.

[0059] The above embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present invention. It should be pointed out that, for a person of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention patent shall be subject to the attached claims.

Claims

1. An FDS tightening gun, characterized in that: The invention comprises a feeding device (2) and a pressing device (3); the feeding device (2) comprises a first cylinder (20), a first support plate (210) and a first sliding assembly (24); the pressing device (3) comprises a second cylinder (30), a nail feeding assembly (5), a third connecting plate (342) and a second sliding assembly (32); the first cylinder (20) and the second cylinder (30) are located between the first sliding assembly (24) and the second sliding assembly (32) and close to the center of mass (M) of the tightening gun; the first support plate (210) A fourth cylinder (23) and a knife bar bracket (21) are connected to and fixedly connected with the first cylinder (20); the knife bar bracket (21) is fixedly connected to the first sliding assembly (24) and the second sliding assembly (32); the third connecting plate (342) is connected to the second cylinder (30) and fixedly connected to the second sliding assembly (32); the nail feeding assembly (5) is fixedly connected to one side of the third connecting plate (342); and the fourth cylinder (23) is arranged on the other side of the third connecting plate (342).

2. The FDS tightening gun according to claim 1, characterized in that: The first cylinder (20) is located above the fourth cylinder (23).

3. The FDS tightening gun according to claim 1, characterized in that: The clamping device (3) further comprises a stopping bolt (33), wherein the stopping bolt (33) is fixedly connected to the third connecting plate (342).

4. The FDS tightening gun according to claim 4, characterized in that: The fourth cylinder (23) comprises a fourth piston rod (230), and the fourth piston rod (230) is aligned with the stop bolt (33) in the vertical direction.

5. The FDS tightening gun according to claim 1, characterized in that: The first sliding assembly (24) comprises a pair of first guide pillars (240), and the pair of first guide pillars (240) are symmetrically arranged on both sides of the first cylinder (20).

6. The FDS tightening gun according to claim 5, characterized in that: The second sliding assembly (32) comprises a pair of second guide pillars (320), and the pair of second guide pillars (320) are symmetrically arranged on both sides of the second cylinder (30).

7. The FDS tightening gun according to claim 6, characterized in that: The first sliding assembly (24) further comprises a first slider (241) slidably connected to the first guide column (240), the second sliding assembly (32) further comprises a second slider (321) slidably connected to the second guide column (320), and the knife bar bracket (21) is fixedly connected to both the first slider (241) and the second slider (321).

8. The FDS tightening gun according to claim 7, characterized in that: The second sliding assembly (32) further comprises a third sliding block (322) slidably connected to the second guide column (320); the third sliding block (322) is located below the second sliding block (321) and is fixedly connected to the third connecting plate (342).

9. The FDS tightening gun according to claim 1, characterized in that: The feeding device (2) further comprises a knife bar assembly (22) fixedly connected to the knife bar bracket (21); the tightening gun further comprises a power device (1); the power device (1) is fixedly connected to the knife bar assembly (22).

10. The FDS tightening gun according to claim 9, characterized in that: The knife bar assembly (22) is arranged below the power device (1), and the nail feeding assembly (5) is arranged below the knife bar assembly (22).

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