Efficient welding positioning system and method and positioning tool for automobile seat welding

Abstract

The invention provides a novel efficient welding positioning system and method and a positioning tool for automobile seat welding, the system comprises a base and a plurality of positioning units, each positioning unit comprises a first seat body, a second seat body and a pressing seat body, a containing cavity is vertically formed in each pressing seat body, and a steering groove and a descending groove are formed in the inner wall of each containing cavity; the top of the descending groove is communicated with the bottom of the steering groove; the positioning pin vertically and movably penetrates through the first seat body, a transition pin is arranged at the top of the positioning pin, the diameter of the transition pin is increased along with reduction of the height, and the diameter of the bottom of the transition pin is equal to that of the positioning pin; the lifting column vertically and movably penetrates through the pressing seat body, the outer wall of the lifting column is attached to the pressing seat body, a linkage column is arranged on the side wall of the lifting column, the free end of the linkage column is located in the steering groove or the descending groove, a pressing arm is horizontally arranged at the top of the lifting column, and a pressing part is arranged at the bottom of the free end of the pressing arm; the power mechanism is used for driving all the positioning pins and all the lifting columns to ascend and descend.

Description

Technical Field

[0001] The present invention belongs to the technical field of welding of automobile seats, and relates to an efficient welding positioning system, method and positioning tooling for welding automobile seats. Background Art

[0002] Welding, also known as fusion welding, is a manufacturing process and technology for joining metals or other thermoplastic materials such as plastics by means of heating, high temperature or high pressure. There are many energy sources for modern welding, including gas flames, electric arcs, lasers, electron beams, friction and ultrasonic waves, etc. In addition to being used in factories, welding can also be carried out in a variety of environments, such as in the wild, underwater and in space. No matter where it is, welding may pose risks to operators, so appropriate protective measures must be taken during welding. The injuries that welding may cause to the human body include burns, electric shock, vision damage, inhalation of toxic gases, excessive ultraviolet radiation, etc.

[0003] Currently, welding is used in many fields. For example, the welding process is widely used in the production of automobile parts. During actual welding, first, the structure to be welded is placed on a fixture, and then the structure above presses the structure to be welded. At this time, the welding parts of the structure to be welded are in a contacting state. Then, workers perform manual electric welding or robotic automatic electric welding. After welding is completed, the structure pressing the workpiece is released, and the overall part can be taken off. Summary of the Invention

[0004] The purpose of the present invention is to provide a new efficient welding positioning system, method and positioning tooling for welding automobile seats.

[0005] To achieve the above technical effects, the present invention provides an efficient welding positioning system, including a base and a plurality of positioning units arranged on the base. At least two of the positioning units are used to fix a workpiece. The positioning unit includes:

[0006] A first seat body, a second seat body and a pressing seat body. An accommodation cavity is vertically opened inside the pressing seat body. A spiral steering groove and a vertical descending groove are opened on the inner wall of the accommodation cavity. The top of the descending groove communicates with the bottom of the steering groove.

[0007] A positioning pin vertically and movably passes through the first seat body. A transition pin is arranged at the top of the positioning pin. The diameter of the transition pin increases as the height decreases. The diameter of the bottom of the transition pin is equal to the diameter of the positioning pin.

[0008] Lifting column, the lifting column vertically and movably passes through the pressing seat body, and the outer wall of the lifting column is attached to the pressing seat body. A linkage column is arranged on the side wall of the lifting column, and the free end of the linkage column is located in the steering groove or the descending groove. A pressing arm is horizontally arranged at the top of the lifting column, and a pressing part is arranged at the bottom of the free end of the pressing arm;

[0009] Power mechanism, the power mechanism is used to drive all the positioning pins and all the lifting columns to lift. In the standby state, the pressing arm is located at the side parts of the first seat body and the second seat body, and the top of the positioning pin is at the same height as the top of the first seat body. In the working state, the pressing part is located between the first seat body and the second seat body, and the positioning pin is inserted into the pre-opened hole on the workpiece.

[0010] The present invention is further arranged such that the base includes a bottom plate and a top plate located above the bottom plate. A plurality of support columns vertically connected to the bottom plate are arranged at the bottom of the top plate. The positioning pins and the lifting columns all movably pass through the top plate. The power mechanism is located between the bottom plate and the top plate. The first seat body, the second seat body and the pressing seat body are all located on the top plate.

[0011] The present invention is further arranged to further include a first frame and a second frame. The movement trajectories of the first frame and the second frame are in a staggered state. The bottoms of all the positioning pins are fixedly connected to the first frame, and the bottoms of all the lifting columns are horizontally and rotatably connected to the second frame.

[0012] The present invention is further arranged such that the power mechanism includes two support seats vertically arranged at the bottom of the top plate. A power rod is horizontally and rotatably arranged between the two support seats. A motor for driving the power rod to rotate is arranged at the bottom of the top plate. A first power disk and a second power disk are coaxially arranged on the power rod. A first groove body, a second groove body, a third groove body and a fourth groove body that are sequentially communicated end to end are arranged on the side wall of the first power disk. A fifth groove body, a sixth groove body, a seventh groove body and an eighth groove body that are sequentially communicated end to end are arranged on the side wall of the second power disk;

[0013] The straight line where the axis of the power rod is located is the reference axis. The distances between all parts of the first groove body and the reference axis are all equal. The distance between the upstream side of the second groove body and the reference axis is less than the distance between the downstream side and the reference axis. The distances between all parts of the third groove body and the reference axis are all equal. The distance between the upstream side of the fourth groove body and the reference axis is greater than the distance between the downstream side and the reference axis;

[0014] The distance between the upstream side of the fifth groove body and the reference axis is greater than the distance between the downstream side and the reference axis. The distances between all parts of the sixth groove body and the reference axis are equal. The distance between the upstream side of the seventh groove body and the reference axis is less than the distance between the downstream side and the reference axis. The distance between the upstream side of the eighth groove body and the reference axis is less than the distance between the downstream side and the reference axis;

[0015] A first arm body is vertically arranged at the bottom of the first frame, and a second arm body is vertically arranged at the bottom of the second frame. A first linkage part is horizontally arranged at the side of the first arm body, and a second linkage part is arranged at the side of the second arm body;

[0016] The power rod includes a first state, a second state, a third state, and a fourth state;

[0017] When the power rod is in the first state, the first linkage part is in the first groove body, the second linkage part is in the fifth groove body, the top of the positioning pin is at the same height as the top of the first seat body, and the first positioning pin is in a stationary state. The linkage column is located in the steering groove, and the pressing arm is located at the sides of the first seat body and the second seat body. The pressing arm moves downward and swings towards the second seat body;

[0018] When the power rod is in the second state, the first linkage part is in the second groove body, the second linkage part is in the sixth groove body, the positioning pin moves upward and inserts into the pre-opened hole. The linkage column is located at the bottom of the steering groove, the pressing arm is in a stationary state, and there is a set gap between the pressing part and the top of the workpiece;

[0019] When the power rod is in the third state, the first linkage part is in the third groove body, the second linkage part is in the seventh groove body, the linkage column is located in the descending groove, and the pressing part moves downward and abuts against the top of the workpiece;

[0020] When the power rod is in the fourth state, the first linkage part is in the fourth groove body, the second linkage part is in the eighth groove body, the positioning pin moves downward, and the lifting column moves upward.

[0021] The present invention is further configured such that a plurality of the first arm bodies are provided at the bottom of the first frame body, a plurality of the second arm bodies are provided at the bottom of the second frame body, the first linkage portions are provided at both ends of each of the first arm bodies, the second linkage portions are provided at both ends of each of the second arm bodies, the first power disks are provided on both sides of each of the first arm bodies, the second power disks are provided on both sides of each of the second arm bodies, the first linkage portions and the second linkage portions are both cylindrical, and the first linkage portions are rotationally connected to the first arm bodies, and the second linkage portions are rotationally connected to the second arm bodies.

[0022] The present invention is further configured such that each workpiece is positioned by two of the positioning units. One of the positioning pins for fixing the same workpiece is the first pin body, and the other positioning pin is the second pin body. A guiding pin is provided at the top of the transition pin connected to the first pin body. The diameter of the guiding pin increases as the height decreases, and the diameter of the bottom of the guiding pin is equal to the diameter of the top of the transition pin;

[0023] The second pin body includes a bottom pin portion and a top pin portion located above the bottom pin portion. The bottom pin portions are all connected to the first frame. When the bottom pin portion is in a stationary state, the top pin portion can be lowered so that the top of the transition pin is at the same height as the top of the first seat body. When the bottom pin portion is raised, the bottom pin portion raises the top pin portion and makes the top of the top pin portion higher than the first seat body and inserted into the pre-opened hole.

[0024] The present invention is further configured such that a first hole body, a first accommodation groove, a second hole body, a second accommodation groove, and a third hole body are vertically and sequentially formed through the first seat body. The diameter of the first accommodation groove is larger than the diameter of the first hole body and the diameter of the second hole body. The diameter of the second accommodation groove is larger than the diameter of the second hole body and the diameter of the third hole body. The outer wall of the top pin portion is movably fitted to the inner walls of the first hole body and the second hole body. The outer wall of the bottom pin portion is movably fitted to the inner wall of the third hole body. A first synchronous disk is provided on the outer wall of the top pin portion. A first elastic member is provided between the bottom of the first synchronous disk and the bottom of the first accommodation groove;

[0025] Two vertical grooves are vertically formed at the top of the second accommodation groove. The cross-section of the vertical grooves is rectangular. A vertical portion is vertically and movably provided in the vertical grooves. The outer wall of the vertical portion is fitted to the inner walls of the vertical grooves. A horizontal portion is horizontally provided at the bottom of the vertical portion. An elastic portion is vertically provided at the bottom inside the horizontal portion. A clamping portion is provided at the bottom of the elastic portion. A clamping groove with a semi-circular cross-section is vertically formed inside the clamping portion, and the outer side is an inclined clamping slope. The clamping portions are provided on both sides of the bottom of the top pin portion;

[0026] At the top of the bottom pin portion, a U-shaped driving portion with an upward opening is provided. The driving portion is movably located in the second receiving groove. The inner walls on both sides of the driving portion are inclined driving slopes, and the inclination direction of the driving slope is the same as that of the clamping slope on the same side.

[0027] The clamping portion includes a fifth state, a sixth state, a seventh state, and an eighth state.

[0028] When the clamping portion is in the fifth state, the top of the top pin portion is at the same height as the top of the first seat body. The first synchronous disk is lower than the top of the first receiving groove. There is a separation between the side portion of the top pin portion and the clamping groove. The clamping slope is in contact with the driving slope. The bottom of the clamping portion is higher than the middle of the driving portion.

[0029] When the clamping portion is in the sixth state, the top pin portion moves downward, and the top of the transition pin is at the same height as the top of the first seat body. There is a separation between the side portion of the top pin portion and the clamping groove.

[0030] When the clamping portion is in the seventh state, the bottom pin portion rises. The driving slope acts on the clamping slope, causing the two clamping portions to approach each other. There is a set pressure between the side wall of the top pin portion and the inner wall of the clamping groove. The bottom pin portion, the driving portion, and the top pin portion rise synchronously, and the top of the top pin portion is higher than the top of the first seat body.

[0031] The present invention is further configured such that a stabilizing rod is vertically provided at the bottom of the top pin portion. A stabilizing groove for the stabilizing rod to enter is provided at the top of the bottom pin portion. The outer wall of the stabilizing rod is movably in contact with the inner wall of the stabilizing groove. A limiting cylinder is vertically provided at the top of the bottom pin portion. The top pin portion movably passes through the top of the limiting cylinder. A second synchronous disk is provided on the outer wall of the top pin portion. The second synchronous disk is movably located in the limiting cylinder. A second elastic member in a continuously compressed state is provided between the bottom of the second synchronous disk and the inner wall of the bottom of the limiting cylinder. Two mirror-image synchronous portions are provided at the top of the limiting cylinder. The facing sides of the two synchronous portions are synchronous surfaces. A rectangular parallelepiped-shaped synchronous block is provided on the outer wall of the top pin portion. The synchronous block is located below the top plate and between the two synchronous portions. The minimum distance between the synchronous surface and the synchronous block decreases as the height decreases. A hole for the synchronous portion to enter is provided at the bottom of the top plate.

[0032] Two support plates are provided at the bottom of the top plate. Semi-circular support portions are provided on both sides of the bottom of the support plates. A J-shaped anti-falling portion is provided inside the support plates. The anti-falling portion is connected to the edges of the support plates and the support portions. The synchronization block is located between the two support plates, and there are set gaps between the movement trajectory of the synchronization block and the support plates, the support portions, and the anti-falling portion.

[0033] It further includes a cylindrical synchronization column. The two ends of the synchronization column are movably attached to the inner sides of the two support plates or the inner sides of the two support portions. There are two synchronization columns, and the two synchronization columns are located on both sides of the synchronization block. The synchronization column includes an eighth state, a ninth state, and a tenth state.

[0034] When the synchronization column is in the eighth state, the bottom of the synchronization column is located inside the opening at the bottom of the anti-falling portion, and the synchronization column is in a separated state from the synchronization block. The top of the second synchronization disk abuts against the limiting cylinder.

[0035] When the synchronization column is in the ninth state, the bottom pin portion rises, and the synchronization surface drives the synchronization column to move until it abuts against the side portion of the synchronization block.

[0036] When the synchronization column is in the tenth state, the bottom pin portion and the top pin portion are relatively stationary.

[0037] The present invention also discloses a method for positioning using an efficient welding positioning system as described in any one of the above, including the following steps:

[0038] S1. Horizontally place the workpiece on the tops of the first seat body and the second seat body, and insert the transition pin into the pre-opened hole on the workpiece.

[0039] S2. The lifting column moves downward, and at the same time, the pressing arm swings until the pressing portion is located above the workpiece.

[0040] S3. The positioning pin rises and inserts into the pre-opened hole on the workpiece, and the pressing portion limits the lifted workpiece.

[0041] S4. The lifting column moves downward again, the pressing portion abuts against the top of the workpiece, and the bottom of the workpiece abuts against the first seat body and the second seat body.

[0042] S5. Weld the contact portions of different workpieces.

[0043] S6. After welding is completed, the lifting column rises, the positioning pin descends, and the welded workpiece is removed.

[0044] The present invention also discloses a positioning tool for welding automobile seats, comprising a high-efficiency welding positioning system as described in any one of the above items.

[0045] Compared with the prior art, the present invention provides an efficient welding positioning system. When positioning, the workpiece is first placed horizontally on the top of the first seat body and the second seat body, and the transition pin is inserted into the pre-opened hole on the workpiece (the workpiece comes with it), wherein the diameter of the transition pin is relatively small, and the pre-opened hole does not need to be aligned with the positioning pin at this time, and the diameter of the positioning pin is usually equal to the diameter of the pre-opened hole. Therefore, if the positioning pin is fixed in position, whether inserting the positioning pin into the pre-opened hole or separating the positioning pin from the pre-opened hole, the operation requires a certain amount of force; however, the current transition pin has a relatively small diameter, so the transition pin can be better inserted into the pre-opened hole, and the operation difficulty is relatively low; secondly, there is no need to fully align the pre-opened hole with the positioning pin, which further improves the convenience of operation;

[0046] Then the lifting column moves downward, and the clamping arm swings until the clamping part is located above the workpiece; at this time, there is a certain height difference (small) between the clamping part and the top of the workpiece, so that the clamping part can not affect the horizontal movement of the workpiece;

[0047] After that, the positioning pin is raised and inserted into the pre-opened hole on the workpiece, and the clamping part limits the lifted workpiece; if there is a small misalignment between the positioning pin and the pre-opened hole (this is the case in most cases), the side wall of the transition pin will inevitably act on the inner wall of the hole during the positioning pin's raising process, and drive the workpiece to move upward and horizontally. Since the clamping part is located above the workpiece at this time, it can prevent the workpiece from rising too much; at the same time, the clamping part does not hinder the horizontal movement of the workpiece, so during the positioning pin's raising process, the side wall of the transition pin can drive the workpiece to move, so that the positioning pin can be normally inserted into the pre-opened hole.

[0048] After that, the lifting column goes down again, and the clamping part contacts the top of the workpiece, and the bottom of the workpiece contacts the first seat and the second seat; at this time, in the horizontal direction, the outer wall of the positioning pin fits the inner wall of the pre-opening, and in the vertical direction, the clamping part, the first seat and the second seat fix the position of the workpiece, and at the same time, each workpiece has at least two positioning units for positioning, so that the workpiece has precise position stability. At this time, the contact points of different workpieces are welded. According to the actual situation, workers can weld with handheld electric welding, or a robot can move the electric welding head for automatic welding. After the welding is completed, the lifting column rises, the positioning pin drops, and the welded workpiece is removed, wherein the workpiece at this time is a large workpiece composed of multiple workpieces; at the same time, because the positioning pin is lowered to the same height as the top of the first seat, the transition pin is located in the pre-opening at this time. Since the diameter of the transition pin is smaller than the diameter of the pre-opening, the workpiece can be removed from the positioning unit very conveniently and labor-savingly. Brief Description of the Drawings

[0049] Figure 1 is a schematic diagram of the structure of the first embodiment of the present invention Figure 1 ;

[0050] Figure 2 is Figure 1 an enlarged view of part A in

[0051] Figure 3 is a schematic diagram of the structure of the first embodiment of the present invention Figure 2 ;

[0052] Figure 4 is Figure 3 an enlarged view of part B in

[0053] Figure 5 is a schematic diagram of the part below the top plate in the first embodiment of the present invention

[0054] Figure 6 is Figure 5 an enlarged view of part C in

[0055] Figure 7 is Figure 5 an enlarged view of part D in

[0056] Figure 8 is a cross - section of the first embodiment of the present invention Figure 1 ;

[0057] Figure 9 is Figure 8 an enlarged view of part E in

[0058] Figure 10 is Figure 8 an enlarged view of part F in

[0059] Figure 11 is a cross - section of the first embodiment of the present invention Figure 2 ;

[0060] Figure 12 is Figure 11 an enlarged view of part G in

[0061] Figure 13 is Figure 11 an enlarged view of part H in

[0062] Figure 14 is a cross - sectional view of the first power disk and the second power disk in various states in the first embodiment of the present invention

[0063] Figure 15 is a schematic diagram of the inside of the first housing in the first embodiment of the present invention

[0064] Figure 16It is a schematic diagram of the second pin body part in the first embodiment of the present invention;

[0065] Figure 17 It is a schematic diagram of the clamping part in the first embodiment of the present invention;

[0066] Figure 18 It is an internal schematic diagram of the pressing seat body in the first embodiment of the present invention;

[0067] Figure 19 It is a schematic diagram of the lifting column part in the first embodiment of the present invention;

[0068] Figure 20 It is a schematic diagram of the second pin body part in the second embodiment of the present invention;

[0069] Figure 21 It is a cross-sectional view of the second pin body part in the second embodiment of the present invention;

[0070] Figure 22 It is a schematic diagram of the top pin part in the second embodiment of the present invention;

[0071] Figure 23 It is a schematic diagram of the support plate and the top plate in the second embodiment of the present invention;

[0072] Figure 24 It is a schematic diagram of the support plate and the support part in the second embodiment of the present invention.

[0073] Among them, 1. Base; 1a. Bottom plate; 1b. Top plate; 1c. Support column; 2. First seat body; 3. Second seat body; 4. Pressing seat body; 5. Accommodation cavity; 6. Steering groove; 7. Descending groove; 8. Transition pin; 9. Lifting column; 10. Linking column; 11. Pressing arm; 12. Pressing part; 13. First frame; 14. Second frame; 15. Support seat; 16. Power rod; 17. Motor; 18. First power disk; 19. Second power disk; 20. First groove body; 21. Second groove body; 22. Third groove body; 23. Fourth groove body; 24. Fifth groove body; 25. Sixth groove body; 26. Seventh groove body; 27. Eighth groove body; 28. First arm body; 29. Second arm body; 30. First pin body; 31. Second pin body; 31a. Bottom pin part; 31b. Top pin part; 32. Guide pin; 33. First hole body; 34. First accommodation groove; 35. Second hole body; 36. Second accommodation groove; 37. Third hole body; 38. First synchronous disk; 39. First elastic part; 40. Vertical groove; 41. Vertical part; 42. Horizontal part; 43. Elastic part; 44. Clamping part; 45. Clamping groove; 46. Clamping inclined plane; 47. Driving part; 48. Driving inclined plane; 49. Stabilizing rod; 50. Stabilizing groove; 51. Limiting cylinder; 52. Second synchronous disk; 53. Second elastic part; 54. Synchronous part; 55. Synchronous surface; 56. Synchronous block; 57. Support plate; 58. Support part; 59. Anti-falling part; 60. Synchronous column. Detailed implementation mode

[0074] Embodiment 1

[0075] An efficient welding positioning system, as Figures 1 to 19 shown, includes a base 1 and a plurality of positioning units arranged on the base 1. At least two of the positioning units are used to fix a workpiece (where the workpiece and the pre-drilled hole are not the objects claimed in this application and are introduced here only for auxiliary explanation; secondly, the specific shape of the workpiece is not limited too much, and the attached drawings are only for illustration). The positioning unit includes:

[0076] A first seat body 2, a second seat body 3 and a pressing seat body 4. An accommodation cavity 5 is vertically opened inside the pressing seat body 4. A spiral steering groove 6 and a vertical descending groove 7 are opened on the inner wall of the accommodation cavity 5. The top of the descending groove 7 communicates with the bottom of the steering groove 6;

[0077] A positioning pin vertically passes through the first seat body 2 movably. A transition pin 8 is arranged at the top of the positioning pin. The diameter of the transition pin 8 increases as the height decreases. The diameter of the bottom of the transition pin 8 is equal to the diameter of the positioning pin;

[0078] The lifting column 9 vertically and movably passes through the pressing seat body 4, and the outer wall of the lifting column 9 is in contact with the pressing seat body 4. A linkage column 10 is arranged on the side wall of the lifting column 9, and the free end of the linkage column 10 is located in the steering groove 6 or the descending groove 7. A pressing arm 11 is horizontally arranged at the top of the lifting column 9, and a pressing part 12 is arranged at the bottom of the free end of the pressing arm 11;

[0079] A power mechanism is used to drive all the positioning pins and all the lifting columns 9 to lift. In the standby state, the pressing arm 11 is located at the side of the first seat body 2 and the second seat body 3, and the top of the positioning pin is at the same height as the top of the first seat body 2. In the working state, the pressing part 12 is located between the first seat body 2 and the second seat body 3, and the positioning pin is inserted into the pre-opened hole on the workpiece.

[0080] The base 1 includes a bottom plate 1a and a top plate 1b located above the bottom plate 1a. A plurality of support columns 1c vertically connected to the bottom plate 1a are arranged at the bottom of the top plate 1b. Both the positioning pin and the lifting column 9 movably pass through the top plate 1b. The power mechanism is located between the bottom plate 1a and the top plate 1b. The first seat body 2, the second seat body 3, and the pressing seat body 4 are all located on the top plate 1b.

[0081] It further includes a first frame 13 and a second frame 14. The movement trajectories of the first frame 13 and the second frame 14 are in a staggered state. The bottoms of all the positioning pins are fixedly connected to the first frame 13, and the bottoms of all the lifting columns 9 are horizontally and rotatably connected to the second frame 14.

[0082] The power mechanism includes two support seats 15 vertically arranged at the bottom of the top plate 1b. A power rod 16 is horizontally and rotatably arranged between the two support seats 15. A motor 17 for driving the power rod 16 to rotate is arranged at the bottom of the top plate 1b. A first power disk 18 and a second power disk 19 are coaxially arranged on the power rod 16. A first groove body 20, a second groove body 21, a third groove body 22, and a fourth groove body 23 that are sequentially connected end to end are formed on the side wall of the first power disk 18. A fifth groove body 24, a sixth groove body 25, a seventh groove body 26, and an eighth groove body 27 that are sequentially connected end to end are formed on the side wall of the second power disk 19;

[0083] The straight line where the axis of the power rod 16 lies is the reference axis. The distances between various parts of the first groove body 20 and the reference axis are all equal. The distance between the upstream side of the second groove body 21 and the reference axis is less than the distance between the downstream side of the second groove body 21 and the reference axis. The distances between various parts of the third groove body 22 and the reference axis are all equal. The distance between the upstream side of the fourth groove body 23 and the reference axis is greater than the distance between the downstream side of the fourth groove body 23 and the reference axis;

[0084] The distance between the upstream side of the fifth groove body 24 and the reference axis is greater than the distance between the downstream side of the fifth groove body 24 and the reference axis. The distances between various parts of the sixth groove body 25 and the reference axis are all equal. The distance between the upstream side of the seventh groove body 26 and the reference axis is less than the distance between the downstream side of the seventh groove body 26 and the reference axis. The distance between the upstream side of the eighth groove body 27 and the reference axis is less than the distance between the downstream side of the eighth groove body 27 and the reference axis;

[0085] A first arm body 28 is vertically arranged at the bottom of the first frame 13. A second arm body 29 is vertically arranged at the bottom of the second frame 14. A first linkage part is horizontally arranged on the side of the first arm body 28. A second linkage part is arranged on the side of the second arm body 29;

[0086] The power rod 16 includes a first state, a second state, a third state, and a fourth state;

[0087] When the power rod 16 is in the first state, the first linkage part is in the first groove body 20, the second linkage part is in the fifth groove body 24, the top of the positioning pin is at the same height as the top of the first seat body 2, and the first positioning pin is in a static state. The linkage column 10 is located in the steering groove 6, and the pressing arm 11 is located on the sides of the first seat body 2 and the second seat body 3. The pressing arm 11 moves downward and swings towards the second seat body 3;

[0088] When the power rod 16 is in the second state, the first linkage part is in the second groove body 21, the second linkage part is in the sixth groove body 25, the positioning pin moves upward and is inserted into the pre-opened hole. The linkage column 10 is located at the bottom of the steering groove 6, the pressing arm 11 is in a static state, and there is a set gap between the pressing part 12 and the top of the workpiece (wherein the "set gap" in this application only means that the two structures are in a non-contact state with a very small distance, and the specific gap size can be selected according to the actual situation. For example, it is preferably 0.2 - 0.5 mm, or other selectable distances, and will not be limited too much here);

[0089] When the power rod 16 is in the third state, the first linkage part is within the third groove body 22, the second linkage part is within the seventh groove body 26, the linkage column 10 is located within the descending groove 7, and the pressing part 12 moves downward and abuts against the top of the workpiece.

[0090] When the power rod 16 is in the fourth state, the first linkage part is within the fourth groove body 23, the second linkage part is within the eighth groove body 27, the positioning pin moves downward, and the lifting column 9 moves upward.

[0091] A plurality of the first arm bodies 28 are provided at the bottom of the first frame body, a plurality of the second arm bodies 29 are provided at the bottom of the second frame body. The first linkage parts are provided at both ends of each of the first arm bodies 28, the second linkage parts are provided at both ends of each of the second arm bodies 29. The first power disks 18 are provided on both sides of each of the first arm bodies 28, the second power disks 19 are provided on both sides of each of the second arm bodies 29. The first linkage part and the second linkage part are both cylindrical, and the first linkage part is rotationally connected to the first arm body 28, and the second linkage part is rotationally connected to the second arm body 29.

[0092] Each workpiece is positioned by two of the positioning units. One of the positioning pins for fixing the same workpiece is the first pin body 30, and the other positioning pin is the second pin body 31. A guide pin 32 is provided at the top of the transition pin 8 connected to the first pin body 30. The diameter of the guide pin 32 increases as the height decreases, and the diameter of the bottom of the guide pin 32 is equal to the diameter of the top of the transition pin 8.

[0093] The second pin body 31 includes a bottom pin part 31a and a top pin part 31b located above the bottom pin part 31a. The bottom pin part 31a is connected to the first frame 13. When the bottom pin part 31a is in a stationary state, the top pin part 31b can be lowered so that the top of the transition pin 8 is at the same height as the top of the first seat body 2. When the bottom pin part 31a is raised, the bottom pin part 31a raises the top pin part 31b so that the top of the top pin part 31b is higher than the first seat body 2 and inserted into the pre-opened hole.

[0094] A first hole 33, a first receiving groove 34, a second hole 35, a second receiving groove 36, and a third hole 37 are vertically formed through the first housing 2 in sequence. The diameter of the first receiving groove 34 is larger than the diameters of the first hole 33 and the second hole 35. The diameter of the second receiving groove 36 is larger than the diameters of the second hole 35 and the third hole 37. The outer wall of the top pin portion 31b is movably attached to the inner walls of the first hole 33 and the second hole 35. The outer wall of the bottom pin portion 31a is movably attached to the inner wall of the third hole 37. A first synchronous disk 38 is provided on the outer wall of the top pin portion 31b. A first elastic member 39 is provided between the bottom of the first synchronous disk 38 and the bottom of the first receiving groove 34;

[0095] Two vertical grooves 40 are vertically formed at the top of the second receiving groove 36. The cross-section of the vertical groove 40 is rectangular. A vertical portion 41 is vertically and movably provided in the vertical groove 40. The outer wall of the vertical portion 41 is attached to the inner wall of the vertical groove 40. A horizontal portion 42 is horizontally provided at the bottom of the vertical portion 41 (where support openings are also formed on both sides of the second receiving groove 36. When the bottom of the horizontal portion 42 abuts against the bottom of the support opening, the horizontal portion 42 is higher than the driving portion 47, and the two clamping portions 44 and the driving portion 47 are in a separated state or a fitting state, and the elastic portion 43 is in an undeformed state). An elastic portion 43 is vertically provided at the bottom inside the horizontal portion 42. A clamping portion 44 is provided at the bottom of the elastic portion 43. A clamping groove 45 with a semi-circular cross-section is vertically formed inside the clamping portion 44, and the outer side is a clamping inclined surface 46 in an inclined shape. The clamping portions 44 are provided on both sides of the bottom of the top pin portion 31b;

[0096] A U-shaped driving portion 47 with an upward opening is provided at the top of the bottom pin portion 31a. The driving portion 47 is movably located in the second receiving groove 36. The inner walls on both sides of the driving portion 47 are driving inclined surfaces 48 in an inclined shape. The inclination direction of the driving inclined surface 48 is the same as the inclination direction of the clamping inclined surface 46 on the same side;

[0097] The clamping portion 44 includes a fifth state, a sixth state, a seventh state, and an eighth state;

[0098] When the clamping portion 44 is in the fifth state, the top of the top pin portion 31b is at the same height as the top of the first housing 2. The first synchronous disk 38 is lower than the top of the first receiving groove 34. There is a separation between the side portion of the top pin portion 31b and the clamping groove 45. The clamping inclined surface 46 is attached to the driving inclined surface 48. The bottom of the clamping portion 44 is higher than the middle of the driving portion 47;

[0099] When the clamping part 44 is in the sixth state, the top pin part 31b descends, and the top of the transition pin 8 is at the same height as the top of the first seat body 2, and there is a separation between the side part of the top pin part 31b and the clamping groove 45;

[0100] When the clamping part 44 is in the seventh state, the bottom pin part 31a rises, the driving inclined surface 48 acts on the clamping inclined surface 46, and makes the two clamping parts 44 approach each other. There is a set pressure between the side wall of the top pin part 31b and the inner wall of the clamping groove 45 (where the magnitude of this pressure is sufficient to drive the top pin part 31b to rise. At the same time, the shape formed by the two clamping grooves 45 is close to an inverted frustum shape with a larger upper part and a smaller lower part, which can prevent the top pin part 31b from moving downward relative to the clamping part 44). The bottom pin part 31a, the driving part 47, and the top pin part 31b rise synchronously, and the top of the top pin part 31b is higher than the top of the first seat body 2. Preferably, there is also a magnetic attraction force between the horizontal part 42 and the bottom of the second receiving groove 36 (such as embedding a magnetic block at the bottom of the second receiving groove 36). In this way, when the bottom pin part 31a is stationary, the top pin part 31b can rise and fall normally; but when the bottom pin part 31a rises, at this time, due to the magnetic attraction between the horizontal part 42 and the bottom of the second receiving groove 36, the horizontal part 42 will not rise immediately, but needs to have a certain acting force between the driving inclined surface 48 and the clamping inclined surface 46 before it can rise. At the same time, during this process, the elastic part 43 undergoes elastic deformation, and makes the two clamping parts 44 approach each other.

[0101] The present invention also discloses a method of positioning using an efficient welding positioning system as described in any one of the above, including the following steps:

[0102] S1, Horizontally place the workpiece on the tops of the first seat body 2 and the second seat body 3, and insert the transition pin 8 into the pre-opened hole on the workpiece;

[0103] S2, The lifting column 9 moves downward, and at the same time, the pressing arm 11 swings until the pressing part 12 is located above the workpiece;

[0104] S3, The positioning pin rises, and the positioning pin is inserted into the pre-opened hole on the workpiece, and the pressing part 12 limits the lifted workpiece;

[0105] S4, The lifting column 9 descends again, the pressing part 12 abuts against the top of the workpiece, and the bottom of the workpiece abuts against the first seat body 2 and the second seat body 3;

[0106] S5, Weld the contact parts of different workpieces;

[0107] S6, After welding is completed, the lifting column 9 rises, the positioning pin descends, and the welded workpiece is removed.

[0108] The present invention also discloses a positioning tool for welding automobile seats, including an efficient welding positioning system as described in any one of the above items. In this embodiment, it is preferred that during the welding process of the automobile seat, each unit of the seat is positioned and then welded, such as the seat frame and the seat accessories are positioned and then welded; of course, it should also be understood that according to actual conditions, it can also be any other scene that requires positioning and welding, not limited to automobile seats.

[0109] The present invention provides an efficient welding positioning system, method and positioning tool for automobile seat welding. When positioning, the workpiece is first placed horizontally on the top of the first seat body 2 and the second seat body 3, and the transition pin 8 is inserted into the pre-opening on the workpiece (the workpiece has it), wherein the diameter of the transition pin 8 is relatively small, and the pre-opening does not need to be aligned with the positioning pin at this time. At the same time, the diameter of the positioning pin is usually equal to the diameter of the pre-opening. Therefore, if the positioning pin is fixed in position, whether inserting the positioning pin into the pre-opening or separating the positioning pin from the pre-opening, the operation requires a certain amount of force; however, the current transition pin 8 has a relatively small diameter, so the transition pin 8 can be better inserted into the pre-opening, and the operation difficulty is relatively low; secondly, there is no need to fully align the pre-opening with the positioning pin, which further improves the convenience of operation;

[0110] Then the lifting column 9 moves downward, and at the same time the clamping arm 11 swings until the clamping portion 12 is located above the workpiece; at this time, there is a certain height difference (small) between the clamping portion 12 and the top of the workpiece, so that the clamping portion 12 can not affect the horizontal movement of the workpiece;

[0111] After that, the positioning pin is raised and inserted into the pre-opened hole on the workpiece, and the clamping part 12 limits the lifted workpiece; if there is a small misalignment between the positioning pin and the pre-opened hole (this is the case in most cases), the side wall of the transition pin 8 will inevitably act on the inner wall of the hole during the positioning pin's raising process, and drive the workpiece to move upward and horizontally. Since the clamping part 12 is located above the workpiece at this time, it can prevent the workpiece from being raised too much; at the same time, the clamping part 12 does not hinder the horizontal movement of the workpiece, so during the positioning pin's raising process, the side wall of the transition pin 8 can drive the workpiece to move, so that the positioning pin can be normally inserted into the pre-opened hole.

[0112] After that, the lifting column 9 descends again, and the pressing part 12 abuts against the top of the workpiece, causing the bottom of the workpiece to abut against the first seat body 2 and the second seat body 3. At this time, in the horizontal direction, the outer wall of the positioning pin fits against the inner wall of the pre-opened hole. In the vertical direction, the pressing part 12, the first seat body 2, and the second seat body 3 fix the position of the workpiece. At the same time, at least two positioning units are used to position each workpiece, so that the workpiece has precise position stability. At this time, the contact parts of different workpieces are welded. Depending on the actual situation, it can be welded by a worker holding an electric welding gun or an automatic welding can be carried out by a manipulator moving the welding head. After welding is completed, the lifting column 9 rises and the positioning pin descends to remove the welded workpiece. At this time, the workpiece is a large workpiece composed of multiple workpieces. At the same time, since the positioning pin is lowered to the same height as the top of the first seat body 2, at this time, the transition pin 8 is located in the pre-opened hole. Since the diameter of the transition pin 8 is smaller than the diameter of the pre-opened hole, the workpiece can be conveniently and labor-savingly removed from the positioning unit.

[0113] Since the height of the guiding pin 32 is higher than that of the transition pin 8, and each workpiece unit is horizontally limited only by two positioning pins, when placing the workpiece, only need to first sleeve a pre-opened hole onto the guiding pin 32, and then lower the height of the workpiece, and make the other pre-opened hole sleeve onto the transition pin 8, that is, there is no need to align the two pre-opened holes with the two transition pins 8 at the same time, and the operation convenience is further improved. Moreover, when placing the workpiece, the positions of the first pin body 30 and the guiding pin 32 are fixed, but the top pin part 31b in the second pin body 31 can be lifted and lowered. In this way, when a pre-opened hole is sleeved onto the guiding pin 32 and transitions from the guiding pin 32 to the corresponding transition pin 8, even if the other pre-opened hole is not directly opposite to the corresponding transition pin 8, for example, the bottom of the workpiece abuts against the top of the transition pin 8, at this time, the workpiece can press down the top pin part 31b, so that the bottom of the workpiece can abut against the top of the first seat body 2. Then the worker only needs to swing or move the workpiece within a small range, and after the transition pin 8 on the top pin part 31b is directly opposite to the pre-opened hole, the top pin part 31b automatically bounces up, so that the transition pin 8 enters the pre-opened hole.

[0114] That is, the entire operation process is as follows: After a worker sleeved a pre-opened hole onto the relatively high guide pin 32, the workpiece was lowered, and the workpiece was lowered onto the transition pin 8 at the bottom of the guide pin 32. If another pre-opened hole was aligned with the transition pin 8 on the top pin portion 31b at this time, the position of the workpiece did not need to be adjusted anymore; however, if another pre-opened hole was not well aligned with the transition pin 8 on the top pin portion 31b, but the bottom of the workpiece touched the top of the transition pin 8, the workpiece could press down the transition pin 8 at this time, and the bottom of the workpiece touched the top of the first seat body 2; but usually there would not be a large positional deviation between the pre-opened hole and the transition pin 8 on the top pin portion 31b, so the worker only needed to slightly swing or move the angle of the workpiece to make the pre-opened hole face the transition pin 8 on the top pin portion 31b, and at this time the top pin portion 31b rose and the transition pin 8 was inserted into the pre-opened hole. The tops of the first seat body 2 and the second seat body 3 can both be horizontal, which is convenient for the workpiece to move (both swinging or translation are possible); or the top of the first seat body 2 can be horizontal, while there are protrusions on both sides of the top of the second seat body 3 for limiting the workpiece. At this time, when placing the workpiece, if the pre-opened hole is not aligned with the transition pin 8 on the top of the top pin portion 31b, the workpiece can be translated a small distance to sleeve the pre-opened hole onto the transition pin 8 on the top of the top pin portion 31b.

[0115] After the bottom of the workpiece touched the top of the transition pin 8, at this time, since the side wall of the top pin portion 31b and the clamping groove 45 were in a separated state, the top pin portion 31b could be directly compressed, and at the same time, the first elastic member 39 was compressed. Then when the pre-opened hole moved to face the transition pin 8, the first elastic member 39 rose under the action of the elastic force, and the transition pin 8 was inserted into the pre-opened hole. At this time, the positioning pin and the corresponding pre-opened hole were usually not in a coaxial state either, that is, the subsequent workpiece would also be driven by the side wall of the transition pin 8.

[0116] After that, the motor 17 drove the power rod 16 to rotate, and the power rod 16 drove the first power disk 18 and the second power disk 19 to rotate. At this time, since the distances between the first groove body 20 and the reference axis were all equal, the positioning pin and the bottom pin portion 31a were in a fixed position at this time; however, since the distance between the upstream side of the fifth groove body 24 and the reference axis was greater than the distance between the downstream side and the reference axis, the second linkage portion moved downward, and at the same time, it also drove the second frame 14 and all the lifting columns 9 to move downward; during this movement process, since the linkage column 10 was driven by the inner wall of the steering groove 6, the lifting column 9 swung toward the first seat body 2 and the second seat body 3 while descending. When placing the workpiece, the pressing arm 11 and the like were located on the sides of the first seat body 2 and the second seat body 3, so as not to affect the placement of the workpiece.

[0117] After the power lever 16 rotates 90 degrees, the pressing part 12 is slightly higher than the top of the workpiece at this time, and the positioning pin and the bottom pin part 31a are in a static state. Then the power lever 16 continues to rotate. At this time, since the distances between various parts of the sixth groove body 25 and the reference axis are all equal, the lifting column 9, the pressing arm 11, and the pressing part 12 all remain stationary in position. At the same time, since the distance between the upstream side of the second groove body 21 and the reference axis is less than the distance between the downstream side of the second groove body 21 and the reference axis, the first pin body 30 and the bottom pin part 31a both rise at this time. During the rising process of the first pin body 30, the side wall of the transition pin 8 acts on the inner wall of the pre-opened hole, which can directly drive the workpiece to perform a small position movement and make the first pin body 30 coaxial with the corresponding pre-opened hole. While the bottom pin part 31a rises, the driving inclined surface 48 acts on the clamping inclined surface 46, driving the elastic part 43 to undergo elastic deformation. At the same time, the distance between the two clamping parts 44 decreases and abuts against both sides of the bottom of the top pin part 31b. At this time, the top pin part 31b and the bottom pin part 31a are fixed in relative position through the two clamping parts 44, that is, when the bottom pin part 31a rises, the top pin part 31b also rises. Therefore, when the bottom pin part 31a rises to the highest height, the top pin part 31b also inserts into the corresponding pre-opened hole at this time.

[0118] Then the power lever 16 continues to rotate. Since the distances between various parts of the third groove body 22 and the reference axis are all equal, and the distance between the upstream side of the seventh groove body 26 and the reference axis is less than the distance between the downstream side of the seventh groove body 26 and the reference axis, the positions of the first pin body 30 and the top pin part 31b are both fixed and immovable. However, the second linkage part, the second arm body 29, and the lifting column 9 all continue to descend. At this time, since the descending groove 7 is in a vertical state, the pressing arm 11 only descends vertically until finally when the power lever 16 just rotates 90 degrees, the pressing part 12 presses the workpiece, and the bottom of the workpiece abuts against the tops of the first seat body 2 and the second seat body 3; at this time, the positioning of one workpiece is completed; when the positioning of different workpieces is completed, the places where the workpieces need to be welded are in a butting state, and only welding is required.

[0119] After welding is completed, the power rod 16 rotates another 90 degrees. During this process, the first linkage part moves to the upstream end of the first groove body 20, the second linkage part moves to the upstream end of the fifth groove body 24, the linkage column 10 moves to the top of the steering groove 6, and both the first pin body 30 and the bottom pin part 31a drop to the lowest height. At this time, not only are the diameters of the transition pin 8 and the guide pin 32 smaller than the pre-opened hole, but also the pressing arm 11 is located on the side of the workpiece, so that the workpiece can be easily removed. When the bottom pin part 31a rises to the highest height, the first elastic member 39 is in an extended state at this time. After the bottom pin part 31a drops, under the pulling force of the first elastic member 39 and the action of the top of the first receiving groove 34, the top pin part 31b moves downward, and the top pin part 31b is separated from the pre-opened hole, facilitating the separation of the workpiece from the top pin part 31b. At the same time, the horizontal part 42 also moves downward under the action of gravity and magnetic suction force, so that the clamping part 44 is separated from the top pin part 31b until the bottom of the horizontal part 42 abuts against the stepped opening on the side of the second receiving groove 36 (i.e., the bottom of the support opening). At this time, the horizontal part 42 is higher than the driving part 47. During actual use, an elastic body (such as a spring, not shown in the figure) can also be installed between the top of the vertical part 41 and the top of the vertical groove 40, and the spring body is continuously in a compressed state. In this way, under the action of the spring body, the horizontal part 42 is always at the lowest height in the standby state. At the same time, when removing the workpiece, the elastic body can also drive the horizontal part 42 to move downward, so that the clamping part 44 can better return to the separated state from the top pin part 31b. The elastic body does not affect the upward movement of the horizontal part 42, that is, the bottom pin part 31a can normally drive the top pin part 31b to move upward.

[0120] The first linkage part and the second linkage part are both provided on both sides of the first arm body 28 and the second arm body 29. Therefore, not only the position and movement stability of the first arm body 28 and the second arm body 29 are improved, but also the deformation of the first arm body 28 and the second arm body 29 can be better prevented, ensuring the service life and use stability.

[0121] In this application, all the positioning pins (i.e., the first pin body 30 and the second pin body 31) and all the power of the lifting columns 9 come from the same motor 17. Therefore, not only the production and use costs of the equipment are relatively low, but also the accuracy of the cooperation between the positioning pins and the lifting columns 9 can be ensured. Secondly, through the first power disk 18 and the second power disk 19, multi-stage movement of the lifting columns 9 and the positioning pins is realized, and there is a mutual cooperation between their movements, ensuring the operation convenience of placing and removing the workpiece and the position accuracy during the welding process. At the same time, the designs of the guide pin 32, the transition pin 8, the top pin part 31b, and the bottom pin part 31a further improve the operation convenience when placing the workpiece, that is, only need to sleeve the pre-opened hole onto the higher guide pin 32 and then fine-tune the position of the workpiece (which is opaque).

[0122] Example 2

[0123] The difference from Example 1 is that, as Figures 20 to 24 shown, a stabilizing rod 49 is vertically provided at the bottom of the top pin portion 31b, a stabilizing groove 50 for the stabilizing rod 49 to enter is provided at the top of the bottom pin portion 31a, the outer wall of the stabilizing rod 49 is movably attached to the inner wall of the stabilizing groove 50, a limiting cylinder 51 is vertically provided at the top of the bottom pin portion 31a, the top pin portion 31b movably passes through the top of the limiting cylinder 51, a second synchronous disc 52 is provided on the outer wall of the top pin portion 31b, the second synchronous disc 52 is movably located within the limiting cylinder 51, a second elastic member 53 in a continuously compressed state is provided between the bottom of the second synchronous disc 52 and the inner wall of the bottom of the limiting cylinder 51, two mirror-image synchronous portions 54 are provided at the top of the limiting cylinder 51, the facing sides of the two synchronous portions 54 are synchronous surfaces 55, a rectangular parallelepiped-shaped synchronous block 56 is provided on the outer wall of the top pin portion 31b, the synchronous block 56 is located below the top plate 1b, and the synchronous block 56 is located between the two synchronous portions 54, the minimum distance between the synchronous surface 55 and the synchronous block 56 decreases as the height decreases, and a hole for the synchronous portion 54 to enter is provided at the bottom of the top plate 1b;

[0124] Two support plates 57 are provided at the bottom of the top plate 1b, semi-circular support portions 58 are provided on both sides of the bottom of the support plates 57, a J-shaped anti-falling portion 59 is provided inside the support plates 57, the anti-falling portion 59 is connected to the edges of the support plates 57 and the support portions 58, the synchronous block 56 is located between the two support plates 57, and there is a set gap between the movement trajectory of the synchronous block 56 and the support plates 57, the support portions 58, and the anti-falling portion 59;

[0125] It further includes a cylindrical synchronous column 60, the two ends of the synchronous column 60 are movably attached to the inner sides of the two support plates 57 or the inner sides of the two support portions 58, there are two synchronous columns 60, and the two synchronous columns 60 are located on both sides of the synchronous block 56; the synchronous column 60 includes an eighth state, a ninth state, and a tenth state;

[0126] When the synchronous column 60 is in the eighth state, the bottom of the synchronous column 60 is located within the opening portion at the bottom of the anti-falling portion 59, and the synchronous column 60 is in a separated state from the synchronous block 56, and the top of the second synchronous disc 52 abuts against the limiting cylinder 51;

[0127] When the synchronization column 60 is in the ninth state, the bottom pin portion 31a rises, and the synchronization surface 55 drives the synchronization column 60 to move until it abuts against the side portion of the synchronization block 56;

[0128] When the synchronization column 60 is in the tenth state, the bottom pin portion 31a and the top pin portion 31b are relatively stationary.

[0129] When the bottom pin portion 31a does not rise, the top pin portion 31b, the synchronization block 56, the synchronization column 60, the support plate 57, the anti-falling portion 59, etc. are in a non-contact state at this time. Therefore, when the transition pin 8 at the top of the top pin portion 31b is subjected to a downward pressure, the second elastic member 53 can be compressed at this time, so that the transition pin 8 moves downward until it is at the same height as the top of the first base body 2. When the pre-opened hole is aligned with the transition pin 8, the second elastic member 53 drives the second synchronization disk 52 and the top pin portion 31b to rise. When the bottom pin portion 31a rises, first, the second elastic member 53 drives the top pin portion 31b to rise, but the elastic force of the second elastic member 53 is small. Therefore, at this time, the synchronization portion 54 moves upward relative to the synchronization block 56; during the upward movement of the synchronization block 56, the synchronization surface 55 first acts obliquely upward on the synchronization column 60 and drives the synchronization column 60 out from the bottom of the anti-falling portion 59, so that the synchronization column 60 abuts against the side portion of the synchronization block 56. Since the distance between the synchronization surface 55 and the side wall of the synchronization block 56 decreases as the height decreases, the diameter of the synchronization column 60 is fixed, and the synchronization column 60 is preferably made of a material with a relatively large static friction coefficient (such as having a rubber layer on the surface), so the synchronization column 60 cannot rotate and can also prevent relative movement between the synchronization block 56 and the synchronization portion 54, that is, at this time, the top pin portion 31b and the bottom pin portion 31a remain relatively stationary, and the bottom pin portion 31a can raise the top pin portion 31b. The starting time of the rise of the top pin portion 31b is slightly behind that of the bottom pin portion 31a, and the rising stroke of the top pin portion 31b is also slightly smaller than that of the bottom pin portion 31a, but generally speaking, the two rise synchronously and the rising amplitude is the same, that is, the above two differences are almost invisible to the naked eye. The anti-falling portion 59 and the synchronization portion 54 do not affect each other.

[0130] When removing the workpiece, the bottom pin portion 31a descends. At this time, even if the pre-opened hole has a frictional force on the top of the top pin portion 31b, when the top of the limiting cylinder 51 abuts against the second synchronization disk 52, it can also drive the top pin portion 31b to separate from the workpiece, and at this time, the synchronization column 60 moves into the opening at the bottom of the anti-falling portion 59 under the action of gravity and is in a separated state from the synchronization block 56.

[0131] It should also be supplemented and explained that all "settings" and similar descriptive words in this application (especially in the specification) express that there is a connection relationship between two structures, but there is no excessive limitation on the specific means by which the two are connected, and usually it is a conventional connection means, that is, it should be understood that this means is the prior art and does not need to be elaborated too much. For example, "n is provided on m" only expresses that there is an n structure on the m structure, and whether the two are connected by welding, riveting, adhesive connection or integrally formed is within the protection scope of this application; another example is "y is rotatably provided on x", which only expresses that y and x can rotate relative to each other, and as for whether the two are rotationally connected by a bearing, or y directly passes through x and is rotationally connected to x, or other achievable ways, they are all within the protection scope of this application.

Claims

1. An efficient welding positioning system, characterized in that: The invention comprises a base (1) and a plurality of positioning units arranged on the base (1), at least two of the positioning units are used to fix a workpiece, and the positioning units comprise: A first seat body (2), a second seat body (3) and a pressing seat body (4), wherein a receiving chamber (5) is vertically provided inside the pressing seat body (4), and a spiral turning groove (6) and a vertical descending groove (7) are provided on the inner wall of the receiving chamber (5), and the top of the descending groove (7) is communicated with the bottom of the turning groove (6); A positioning pin, the positioning pin vertically moves through the first seat body (2), a transition pin (8) is arranged on the top of the positioning pin, the diameter of the transition pin (8) increases as the height decreases, and the diameter of the bottom of the transition pin (8) is equal to the diameter of the positioning pin; A lifting column (9), the lifting column (9) vertically moves through the pressing seat body (4), and the outer wall of the lifting column (9) is in contact with the pressing seat body (4), the side wall of the lifting column (9) is provided with a linkage column (10), the free end of the linkage column (10) is located in the turning groove (6) or the descending groove (7), the top of the lifting column (9) is horizontally provided with a clamping arm (11), and the bottom of the free end of the clamping arm (11) is provided with a clamping portion (12); A power mechanism, the power mechanism is used to drive all the positioning pins and all the lifting columns (9) to move up and down. In a standby state, the clamping arm (11) is located on the side of the first seat body (2) and the second seat body (3), and the top of the positioning pin is at the same height as the top of the first seat body (2). In a working state, the clamping part (12) is located between the first seat body (2) and the second seat body (3), and the positioning pin is inserted into a pre-opened hole on the workpiece.

2. The high-efficiency welding positioning system according to claim 1, characterized in that: The base (1) comprises a bottom plate (1a) and a top plate (1b) located above the bottom plate (1a); a plurality of supporting columns (1c) connected to the bottom plate (1a) are vertically arranged at the bottom of the top plate (1b); the positioning pin and the lifting column (9) are movable through the top plate (1b); the power mechanism is located between the bottom plate (1a) and the top plate (1b); the first seat body (2), the second seat body (3) and the clamping seat body (4) are all located on the top plate (1b).

3. The high-efficiency welding positioning system according to claim 2, characterized in that: It also includes a first frame (13) and a second frame (14), wherein the movement trajectory of the first frame (13) and the movement trajectory of the second frame (14) are offset, the bottoms of all the positioning pins are fixedly connected to the first frame (13), and the bottoms of all the lifting columns (9) are horizontally rotatably connected to the second frame (14).

4. The high-efficiency welding positioning system according to claim 3, characterized in that: The power mechanism comprises two support seats (15) vertically arranged at the bottom of the top plate (1b), a power rod (16) is horizontally rotatably arranged between the two support seats (15), a motor (17) for driving the power rod (16) to rotate is arranged at the bottom of the top plate (1b), a first power disk (18) and a second power disk (19) are coaxially arranged on the power rod (16), a first slot body (20), a second slot body (21), a third slot body (22) and a fourth slot body (23) which are connected in sequence end to end are provided on the side wall of the first power disk (18), and a fifth slot body (24), a sixth slot body (25), a seventh slot body (26) and an eighth slot body (27) which are connected in sequence end to end are provided on the side wall of the second power disk (19); The straight line on which the axis of the power rod (16) is located is the reference axis, the distance between each part of the first trough (20) and the reference axis is equal, the distance between the upstream side of the second trough (21) and the reference axis is smaller than the distance between the downstream side and the reference axis, the distance between each part of the third trough (22) and the reference axis is equal, and the distance between the upstream side of the fourth trough (23) and the reference axis is larger than the distance between the downstream side and the reference axis; The distance between the upstream side of the fifth trough body (24) and the reference axis is greater than the distance between the downstream side and the reference axis, the distance between each part of the sixth trough body (25) and the reference axis is equal, the distance between the upstream side of the seventh trough body (26) and the reference axis is smaller than the distance between the downstream side and the reference axis, and the distance between the upstream side of the eighth trough body (27) and the reference axis is smaller than the distance between the downstream side and the reference axis; A first arm body (28) is vertically arranged at the bottom of the first frame (13), a second arm body (29) is vertically arranged at the bottom of the second frame (14), a first linkage part is horizontally arranged at the side of the first arm body (28), and a second linkage part is arranged at the side of the second arm body (29); The power rod (16) includes a first state, a second state, a third state and a fourth state; When the power rod (16) is in the first state, the first linkage part is in the first slot body (20), the second linkage part is in the fifth slot body (24), the top of the positioning pin is at the same height as the top of the first seat body (2), and the first positioning pin is in a stationary state, the linkage column (10) is located in the steering slot (6), the clamping arm (11) is located on the side of the first seat body (2) and the second seat body (3), and the clamping arm (11) moves downward and swings toward the second seat body (3); When the power rod (16) is in the second state, the first linkage part is in the second slot body (21), the second linkage part is in the sixth slot body (25), the positioning pin moves upward and is inserted into the pre-opened hole, the linkage column (10) is located at the bottom of the steering slot (6), the clamping arm (11) is in a stationary state, and there is a set gap between the clamping part (12) and the top of the workpiece; When the power rod (16) is in the third state, the first linkage part is in the third slot (22), the second linkage part is in the seventh slot (26), the linkage column (10) is in the descending slot (7), and the pressing part (12) moves downward and contacts the top of the workpiece; When the power rod (16) is in the fourth state, the first linkage part is in the fourth slot (23), the second linkage part is in the eighth slot (27), the positioning pin moves downward, and the lifting column (9) moves upward.

5. The high-efficiency welding positioning system according to claim 4, characterized in that: A plurality of first arms (28) are arranged at the bottom of the first frame, and a plurality of second arms (29) are arranged at the bottom of the second frame. The first linkage parts are arranged at both ends of the first arm (28), and the second linkage parts are arranged at both ends of the second arm (29). Both sides of each first arm (28) have the first power disk (18), and both sides of the second arm (29) have the second power disk (19). Both the first linkage parts and the second linkage parts are cylindrical, and the first linkage part is rotationally connected to the first arm (28), and the second linkage part is rotationally connected to the second arm (29).

6. The high-efficiency welding positioning system according to claim 3, characterized in that: Each workpiece is positioned by two positioning units, one positioning pin used to fix the same workpiece is a first pin body (30), the other positioning pin is a second pin body (31), a guide pin (32) is arranged at the top of the transition pin (8) connected to the first pin body (30), the diameter of the guide pin (32) increases as the height decreases, and the diameter of the bottom of the guide pin (32) is equal to the diameter of the top of the transition pin (8); The second pin body (31) comprises a bottom pin portion (31a) and a top pin portion (31b) located above the bottom pin portion (31a), and the bottom pin portion (31a) is connected to the first frame (13). When the bottom pin portion (31a) is in a stationary state, the top pin portion (31b) can be lowered to make the top of the transition pin (8) equal to the top of the first seat body (2). When the bottom pin portion (31a) is raised, the bottom pin portion (31a) raises the top pin portion (31b) to make the top of the top pin portion (31b) higher than the first seat body (2) and inserted into the pre-opened hole.

7. The high-efficiency welding positioning system according to claim 6, characterized in that: A first hole (33), a first receiving groove (34), a second hole (35), a second receiving groove (36) and a third hole (37) are vertically penetrated through the first seat body (2) in sequence; the diameter of the first receiving groove (34) is larger than the diameter of the first hole (33) and the diameter of the second hole (35); the diameter of the second receiving groove (36) is larger than the diameter of the second hole (35) and the diameter of the third hole (37); the outer wall of the top pin portion (31b) is movably fitted to the inner wall of the first hole (33) and the inner wall of the second hole (35); the outer wall of the bottom pin portion (31a) is movably fitted to the inner wall of the third hole (37); the outer wall of the top pin portion (31b) is provided with a first synchronization disk (38); and a first elastic member (39) is provided between the bottom of the first synchronization disk (38) and the bottom of the first receiving groove (34); The top of the second receiving groove (36) is vertically provided with two vertical grooves (40), the cross section of the vertical groove (40) is rectangular, a vertical portion (41) is vertically and movably arranged in the vertical groove (40), the outer wall of the vertical portion (41) is in contact with the inner wall of the vertical groove (40), a horizontal portion (42) is horizontally arranged at the bottom of the vertical portion (41), an elastic portion (43) is vertically arranged at the bottom of the inner side of the horizontal portion (42), a clamping portion (44) is arranged at the bottom of the elastic portion (43), a clamping groove (45) with a semicircular cross section is vertically arranged on the inner side of the clamping portion (44), and an inclined clamping slope (46) is arranged on the outer side, and the clamping portions (44) are provided on both sides of the bottom of the ejector portion (31b); A U-shaped driving portion (47) with an opening facing upward is provided at the top of the bottom pin portion (31a), and the driving portion (47) is movably located in the second receiving groove (36). The inner walls on both sides of the driving portion (47) are inclined driving inclined surfaces (48), and the inclination direction of the driving inclined surfaces (48) is the same as the inclination direction of the clamping inclined surface (46) on the same side. The clamping portion (44) includes a fifth state, a sixth state, a seventh state and an eighth state; When the clamping portion (44) is in the fifth state, the top of the ejector portion (31b) is at the same height as the top of the first seat body (2), the first synchronization disk (38) is lower than the top of the first accommodating groove (34), the side of the ejector portion (31b) is separated from the clamping groove (45), the clamping inclined surface (46) is in contact with the driving inclined surface (48), and the bottom of the clamping portion (44) is higher than the middle of the driving portion (47); When the clamping portion (44) is in the sixth state, the ejector pin portion (31b) moves downward, and the top of the transition pin (8) is at the same height as the top of the first seat body (2), and the side of the ejector pin portion (31b) is separated from the clamping groove (45); When the clamping portion (44) is in the seventh state, the bottom pin portion (31a) rises, the driving inclined surface (48) acts on the clamping inclined surface (46), and the two clamping portions (44) are brought closer to each other, a set pressure is provided between the side wall of the top pin portion (31b) and the inner wall of the clamping groove (45), the bottom pin portion (31a), the driving portion (47), and the top pin portion (31b) rise synchronously, and the top of the top pin portion (31b) is higher than the top of the first seat body (2).

8. The high-efficiency welding positioning system according to claim 6, characterized in that: A stabilizing rod (49) is vertically arranged at the bottom of the push pin portion (31b); a stabilizing groove (50) for the stabilizing rod (49) to enter is opened at the top of the bottom pin portion (31a); the outer wall of the stabilizing rod (49) is movably fitted to the inner wall of the stabilizing groove (50); a limiting cylinder (51) is vertically arranged at the top of the bottom pin portion (31a); the push pin portion (31b) movably passes through the top of the limiting cylinder (51); a second synchronizing disk (52) is arranged on the outer wall of the push pin portion (31b); the second synchronizing disk (52) is movably located in the limiting cylinder (51); the bottom of the second synchronizing disk (52) is aligned with the bottom inner wall of the limiting cylinder (51). A second elastic member (53) which is continuously in a compressed state is arranged between the walls; two mirror-shaped synchronization parts (54) are arranged on the top of the limiting cylinder (51); the opposite sides of the two synchronization parts (54) are synchronization surfaces (55); a rectangular synchronization block (56) is arranged on the outer wall of the ejector part (31b); the synchronization block (56) is located below the top plate (1b); and the synchronization block (56) is located between the two synchronization parts (54); the minimum distance between the synchronization surface (55) and the synchronization block (56) decreases as the height decreases; and a hole for the synchronization part (54) to enter is opened at the bottom of the top plate (1b); Two support plates (57) are arranged at the bottom of the top plate (1b), and semicircular support portions (58) are arranged on both sides of the bottom of the support plate (57). A J-shaped anti-fall portion (59) is arranged on the inner side of the support plate (57), and the anti-fall portion (59) is connected to the edges of the support plate (57) and the support portion (58). The synchronization block (56) is located between the two support plates (57), and a set gap is formed between the movement trajectory of the synchronization block (56) and the support plate (57), the support portion (58) and the anti-fall portion (59); It also includes a cylindrical synchronization column (60), the two ends of which are movably attached to the inner sides of the two support plates (57) or the inner sides of the two support parts (58), and there are two synchronization columns (60), which are located on both sides of the synchronization block (56); the synchronization column (60) includes an eighth state, a ninth state and a tenth state; When the synchronization column (60) is in the eighth state, the bottom of the synchronization column (60) is located in the opening portion at the bottom of the anti-falling portion (59), and the synchronization column (60) and the synchronization block (56) are in a separated state, and the top of the second synchronization disk (52) abuts against the limiting cylinder (51); When the synchronization column (60) is in the ninth state, the bottom pin portion (31a) rises, and the synchronization surface (55) drives the synchronization column (60) to move until it contacts the side of the synchronization block (56); When the synchronization column (60) is in the tenth state, the bottom pin portion (31a) and the top pin portion (31b) are relatively stationary.

9. A method for positioning using an efficient welding positioning system as claimed in any one of claims 1 to 8, characterized in that: The following steps are involved: S1, placing the workpiece horizontally on top of the first base body (2) and the second base body (3), and inserting the transition pin (8) into the pre-opened hole on the workpiece; S2, the lifting column (9) moves downward, and the clamping arm (11) swings at the same time, until the clamping part (12) is located above the workpiece; S3, the positioning pin is raised and inserted into the pre-opened hole on the workpiece, and the pressing part (12) limits the lifted workpiece; S4, the lifting column (9) moves downward again, the pressing portion (12) contacts the top of the workpiece, and the bottom of the workpiece contacts the first seat body (2) and the second seat body (3); S5, welding the contact points of different workpieces; S6, after welding is completed, the lifting column (9) rises, the positioning pin descends, and the welded workpiece is removed.

10. A positioning tool for welding automobile seats, characterized in that: It comprises an efficient welding positioning system as described in any one of claims 1-8.

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