Automatic clamp positioning system based on automobile part welding

Abstract

The invention relates to an automatic clamp positioning system based on automobile part welding, and belongs to the technical field of welding clamps, and the automatic clamp positioning system based on automobile part welding comprises a machine body, a supporting mechanism, a main board pressing and positioning mechanism, a side pressing and positioning mechanism, a first downward pressing and positioning mechanism, a second downward pressing and positioning mechanism and a pushing, positioning and fixing mechanism, the pushing, positioning and fixing mechanism comprises a first sliding body, a pressing and positioning body, a first driving part and a second driving part, the first sliding body is slidably arranged on the machine body, the sliding direction of the first sliding body is inclined, the first sliding body slides downwards in the direction close to the placement position of the single part C, and the pressing and positioning body is slidably arranged on the first sliding body and slides downwards in the direction close to the placement position of the single part C; the pressing and positioning body is used for positioning and pressing the single part D, and the second driving piece is used for driving the pressing and positioning body to slide in the direction close to or away from the placement position of the single part C. The fixture has the advantage of ensuring the clamping and positioning efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of welding fixtures, and particularly to a fixture automatic positioning system for automotive part welding. Background Art

[0002] In the process of automotive part production, multiple single-piece parts are mainly welded into automotive total parts by spot welding with a welding tong, and there are certain differences in the parts at the same position of the automotive body among different vehicle models.

[0003] Referring to Figure 1 、 Figure 2 and Figure 3 , in the prior art, there are two vehicle models Y and T. The body parts S of both vehicle models Y and T include single-piece part A22, single-piece part B23, single-piece part C24, single-piece part D25, single-piece part E26, and single-piece part F27. Among them, single-piece part A22 is the main board, the cross-section of single-piece part A22 is groove-shaped, and there are flanges 221 on both sides; single-piece part B23 and single-piece part E26 are both welded on the side wall of single-piece part A22. Specifically, single-piece part B23 is L-shaped, and single-piece part E26 is irregular in shape; the cross-section of single-piece part C24 is groove-shaped, and single-piece part C24 is welded to the end of single-piece part A22; single-piece part D25 has multiple fitting edges 251, and multiple fitting edges 251 are welded and fitted to the inner wall of the end of single-piece part C24 far from single-piece part A22, and single-piece part E26 is welded to the inner bottom wall of single-piece part A22.

[0004] Compared with vehicle model Y, vehicle model T has a flash 222 on the side wall of single-piece part A22 and vehicle model T also has single-piece part G28. Single-piece part G28 is inverted U-shaped, and there are two single-piece parts G28, which are respectively welded to the inner bottom walls of single-piece part A22 and single-piece part C24. Moreover, there is a nut on the bottom wall of single-piece part C24 of vehicle model T, while there is a through hole at the same position on the bottom wall of single-piece part C24 of vehicle model Y.

[0005] Currently, when welding the body parts S of both vehicle models Y and T, to ensure the welding precision requirements, especially to ensure the accurate fitting of multiple fitting edges 251 of single-piece part D25 to the inner wall of the end of single-piece part C24 far from single-piece part A22, the efficiency is low when clamping and positioning multiple single-piece parts. Summary of the Invention

[0006] To ensure the clamping and positioning efficiency to a certain extent, the present invention provides a fixture automatic positioning system for automotive part welding.

[0007] The fixture automatic positioning system based on automobile part welding provided by the present invention adopts the following technical solutions: A fixture automatic positioning system based on automobile part welding, comprising: A machine body; A support mechanism for supporting single-piece part A and single-piece part C; A main board pressing and positioning mechanism for positioning and fixing single-piece part A; A side pressing and positioning mechanism for positioning and fixing single-piece part B and single-piece part E to the side of single-piece part A; A first downward pressing and positioning mechanism for positioning and fixing single-piece part C and single-piece part G; A second downward pressing and positioning mechanism for positioning and fixing single-piece part F; A pushing, positioning and fixing mechanism, the pushing, positioning and fixing mechanism includes a first sliding body, a pressing and positioning body, a first driving member and a second driving member, the first sliding body is slidably arranged on the machine body, the sliding direction of the first sliding body is inclined, the first sliding body slides downward in the direction close to the placing position of single-piece part C, the pressing and positioning body is slidably arranged on the first sliding body, the pressing and positioning body is used for positioning and pressing single-piece part D, the first driving member is used for driving the first sliding body to slide, and the second driving member is used for driving the pressing and positioning body to slide in the direction close to or away from the placing position of single-piece part C.

[0008] Preferably, the pressing and positioning body includes a mounting body, a first positioning pin and a first pressing block, the mounting body is slidably arranged on the first sliding body, the second driving member is used for driving the mounting body to slide, a plurality of the first positioning pins are arranged, the plurality of the first positioning pins are arranged on the mounting body, the plurality of the first positioning pins are used for passing through the positioning holes on single-piece part D, and the first pressing block is arranged on the mounting body, and the first pressing block is used for abutting against the side of single-piece part D away from single-piece part C.

[0009] Preferably, the support mechanism includes a plurality of support seats, the plurality of support seats are all arranged on the machine body, and the support seats are used for supporting single-piece part A or single-piece part C.

[0010] Preferably, the main board pressing and positioning mechanism includes a main board main positioning pin, a main board mating positioning pin, and a pressing component. The main board main positioning pin and the main board mating positioning pin are respectively arranged on any two support seats for supporting the single-piece component A. The cross-section of the main board main positioning pin is circular, and the maximum diameter of the main board main positioning pin matches the diameter of the positioning hole on the single-piece component A. The cross-section of the main board mating positioning pin is hexagonal, and the maximum length of the cross-section of the main board mating positioning pin matches the diameter of the positioning hole on the single-piece component A. The direction of the maximum length of the cross-section of the main board mating positioning pin is perpendicular to the extension direction of the single-piece component A. The pressing component is used to press the single-piece component A onto multiple support seats.

[0011] Preferably, the side pressing and positioning mechanism includes a side pressing and positioning component one and a side pressing and positioning component two. The side pressing and positioning component one includes a second sliding body, a second pressing block, and a third driving member. The second sliding body is slidably arranged on the machine body. The second sliding body moves in a direction close to or away from the single-piece component A. The second pressing block is arranged on the second sliding body. The second pressing block is used to abut against the surface of the single-piece component B away from the single-piece component A. A limiting groove for the end portion of the single-piece component B to extend into is formed on the second pressing block. The second pressing block is located above the limiting groove. The third driving member is used to drive the second sliding body to move. The side pressing and positioning component two is used to position and fix the single-piece component E to the side of the single-piece component A.

[0012] Preferably, the side pressing and positioning component two includes a third sliding body, a second positioning pin, a third pressing block, and a fourth driving member. The third sliding body is slidably arranged on the machine body. The third sliding body moves in a direction close to or away from the single-piece component A. A plurality of the second positioning pins are provided, and all the second positioning pins are arranged on the third sliding body. The second positioning pins are used to pass through the positioning holes on the single-piece component E. The third pressing block is arranged on the third sliding body. The third pressing block is used to abut against the side of the single-piece component E away from the single-piece component A. The fourth driving member is used to drive the third sliding body to slide.

[0013] Preferably, the first downward pressing and positioning mechanism corresponds to the single-piece component G one by one. Each first downward pressing and positioning mechanism includes a first adjusting arm, a first downward pressing arm, a first downward pressing seat, a first downward pressing positioning pin, a limiting seat, a fourth pressing block, and a fifth driving member. The first adjusting arm is hinged to the machine body, and the hinge axis of the first adjusting arm is parallel to the extending direction of the single-piece component A. The first downward pressing arm is hinged to the first adjusting arm. The fifth driving member is used to drive one end of the first downward pressing arm away from the single-piece component A to move up or down. The first downward pressing seat is arranged on the first downward pressing arm, and the first downward pressing seat is used to abut against the single-piece component G. The first downward pressing positioning pin is arranged on the first downward pressing seat, and the first downward pressing positioning pin is used to extend into the positioning hole on the corresponding single-piece component G. When the single-piece component G is in the welding position, the upper surface at the positioning hole of the single-piece component G and the hinge center where the corresponding first adjusting arm is hinged to the machine body are located on the same horizontal plane. The limiting seat is used to limit the relative two sides of the single-piece component G. The fourth pressing block is arranged on the first downward pressing arm, and the fourth pressing block is used to abut against the single-piece component A or the single-piece component C.

[0014] Preferably, the second downward pressing and positioning mechanism includes a second adjusting arm, a second downward pressing arm, a second downward pressing seat, a second downward pressing positioning pin, and a sixth driving member. The second adjusting arm is hinged to the machine body, and the hinge axis of the second adjusting arm is parallel to the extending direction of the single-piece component F. The second downward pressing arm is hinged to the second adjusting arm. The sixth driving member is used to drive one end of the second downward pressing arm away from the single-piece component A to move up or down. A plurality of second downward pressing seats are arranged, and all the plurality of second downward pressing seats are arranged on the second downward pressing arm. The second downward pressing seat is used to abut against the single-piece component F. The second downward pressing positioning pin is arranged on the second downward pressing seat, and the second downward pressing positioning pin is used to extend into the positioning hole of the corresponding single-piece component F. When the single-piece component F is in the welding position, the upper surface at the corresponding positioning hole of the single-piece component F and the hinge center where the second adjusting arm is hinged to the machine body are located on the same horizontal plane.

[0015] Preferably, the fixture automatic positioning system further includes a detection mechanism. The detection mechanism includes a first proximity switch, a second proximity switch, a third proximity switch, a fourth proximity switch, a fifth proximity switch, a sixth proximity switch, a seventh proximity switch, and a vehicle model judgment proximity switch. The first proximity switch is used to detect the single-piece component A. The second proximity switch is used to detect the single-piece component B. The third proximity switch is used to detect the single-piece component E. The fourth proximity switch is used to detect the single-piece component G. The fifth proximity switch is used to detect the single-piece component C. The sixth proximity switch is used to detect the single-piece component F. The seventh proximity switch is used to detect the single-piece component D. The vehicle model judgment proximity switch is used to detect the flash on the single-piece component A.

[0016] Preferably, the side pressing and positioning mechanisms correspond to the single-piece component B and the single-piece component E one by one. Each side pressing and positioning mechanism includes a fixed seat, a sliding seat, a suction cup, an unlocking channel, a sealing block, a seventh driving member, and an adjusting component. The fixed seat is arranged on the machine body. The sliding seat is slidably penetrated through the fixed seat. The sliding seat moves in a direction close to or away from the single-piece component A. The seventh driving member is used to drive the sliding of the sliding seat. The suction cup is arranged on the sliding seat. The suction cup is used to adsorb the corresponding single-piece component B or single-piece component E. The unlocking channel is arranged in the sliding seat. The unlocking channel is communicated with the inside of the suction cup. The sealing block is slidably arranged in the fixed seat. The sealing block is used to open or seal the unlocking channel. The adjusting component is used to adjust the sliding of the sealing block.

[0017] In summary, the present invention includes the following beneficial technical effects: During welding, first place the single-piece component A on the supporting mechanism and position the single-piece component A through the main board pressing and positioning mechanism. Then place the single-piece component C on the supporting mechanism as well, making the end of the single-piece component C abut against the end of the single-piece component A. Place the single-piece component B and the single-piece component E on the side pressing and positioning mechanism and position the single-piece component B and the single-piece component E through the side pressing and positioning mechanism. Hang the single-piece component D on the pressing positioning body for positioning. Then place the single-piece component F at the corresponding position inside the single-piece component A. If it is a T model, it is also necessary to place the single-piece component G at the corresponding positions inside the single-piece component A and the single-piece component C. Then fix the single-piece component A through the main board pressing and positioning mechanism, fix the single-piece component B and the single-piece component E through the side pressing and positioning mechanism, fix the single-piece component C and the single-piece component G through the first downward pressing and positioning mechanism, and position and fix the single-piece component F through the second downward pressing and positioning mechanism. Drive the pressing positioning body to drive the fitting edge of the single-piece component D to extend into the single-piece component C through the second driving member. Then drive the first sliding body to drive the pressing positioning body and the single-piece component D to move downward while approaching the single-piece component C through the first driving member, so that the fitting edge fits against the inner wall of the single-piece component C. Thus, each component can be quickly positioned and clamped. Especially, the multiple fitting edges of the single-piece component D can quickly and accurately fit through the displacement changes in multiple directions, avoiding the overlap and misalignment between the single-piece component D and the single-piece component C to a certain extent, ensuring the clamping and positioning efficiency to a certain degree and facilitating the subsequent welding operation. Description of the Drawings

[0018] Figure 1 is the overall structural schematic diagram of the body part S of the T model in the related art.

[0019] Figure 2 is the overall structural explosion diagram of the body part S of the T model in the related art.

[0020] Figure 3 It is a schematic diagram of the overall structure of the body part S of Model Y in the related art.

[0021] Figure 4 It is a schematic diagram of the overall structure of Embodiment 1 of the present invention.

[0022] Figure 5 It is an exploded view of the partial structure of Embodiment 1 of the present invention, mainly used to show the support mechanism.

[0023] Figure 6 It is a schematic diagram of the overall structure of the main positioning pin of the main board and the mating positioning pin of the main board in Embodiment 1 of the present invention.

[0024] Figure 7 It is a schematic diagram of the overall structure of the pressing component in Embodiment 1 of the present invention.

[0025] Figure 8 It is a schematic diagram of the overall structure of the first side pressing and positioning component in Embodiment 1 of the present invention.

[0026] Figure 9 It is a schematic diagram of the overall structure of the second side pressing and positioning component in Embodiment 1 of the present invention.

[0027] Figure 10 It is a schematic diagram of the overall structure of the first downward pressing and positioning mechanism in Embodiment 1 of the present invention.

[0028] Figure 11 It is a schematic diagram of the overall structure of the second downward pressing and positioning mechanism in Embodiment 1 of the present invention.

[0029] Figure 12 It is a schematic diagram of the overall structure of the pushing, positioning and fixing mechanism in Embodiment 1 of the present invention.

[0030] Figure 13 It is a schematic diagram of the overall structure of the pressure measuring and positioning mechanism in Embodiment 2 of the present invention.

[0031] Figure 14 It is a partial structure cross-sectional view of Embodiment 2 of the present invention.

[0032] Description of reference numerals: 1. Machine body; 2. Support mechanism; 201. Support base; 3. Main board pressing and positioning mechanism; 31. Main positioning pin of main board; 32. Matching positioning pin of main board; 33. Pressing assembly; 331. Main board adjusting arm; 332. Main board pressing arm; 333. Main board pressing seat; 334. Eighth driving member; 41. Side pressing and positioning assembly one; 411. Second sliding body; 412. Second pressing block; 413. Third driving member; 42. Side pressing and positioning assembly two; 421. Third sliding body; 422. Second positioning pin; 423. Third pressing block; 424. Fourth driving member; 5. First pressing and positioning mechanism; 51. First adjusting arm; 52. First pressing arm; 53. First pressing seat; 54. First pressing and positioning pin; 55. Limiting seat; 56. Fourth pressing block; 57. Fifth driving member; 6. Second pressing and positioning mechanism; 61. Second adjusting arm; 62. Second pressing arm; 63. Second pressing seat; 64. Second pressing and positioning pin; 65. Sixth driving member; 7. Pushing, positioning and fixing mechanism; 71. First sliding body; 72. Pressing and positioning body; 721. Mounting body; 722. First positioning pin; 723. First pressing block; 73. First driving member; 74. Second driving member; 8. First proximity switch; 9. Second proximity switch; 10. Third proximity switch; 11. Fourth proximity switch; 12. Fifth proximity switch; 13. Sixth proximity switch; 14. Seventh proximity switch; 15. Vehicle type judgment proximity switch; 16. Fixed seat; 17. Sliding seat; 18. Suction cup; 19. Unlocking channel; 20. Sealing block; 21. Seventh driving member; 22. Single-piece part A; 221. Tab; 222. Flash; 23. Single-piece part B; 24. Single-piece part C; 25. Single-piece part D; 251. Fitting edge; 26. Single-piece part E; 27. Single-piece part F; 28. Single-piece part G; 29. Guide rail; 30. First vertical seat; 34. Second vertical seat; 35. Third vertical seat; 36. Fourth vertical seat; 37. Fifth vertical seat; 38. Stopper; 39. Tension spring; 40. Contact post; 43. First arc surface; 44. Second arc surface; 45. Limiting groove; 46. Pressing column; 47. Return spring; 48. Telescopic rod. Detailed implementation manners

[0033] The following is combined with Figures 4 - 14 to further elaborate on the present invention in detail.

[0034] Embodiment 1:

[0035] The embodiment of the present invention discloses a fixture automatic positioning system for automobile part welding. Refer to Figure 4 and Figure 5, The fixture automatic positioning system based on automotive parts welding includes a body 1, a support mechanism 2, a main board pressing and positioning mechanism 3, a side pressing and positioning mechanism, a first downward pressing and positioning mechanism 5, a second downward pressing and positioning mechanism 6, and a pushing, positioning and fixing mechanism 7; among them, the cross-section of the body 1 is rectangular, and the upper surface of the body 1 is horizontally arranged to facilitate the installation of each mechanism.

[0036] Refer to Figure 4 and Figure 5 , Specifically, the support mechanism 2, the main board pressing and positioning mechanism 3, the side pressing and positioning mechanism, the first downward pressing and positioning mechanism 5, the second downward pressing and positioning mechanism 6, and the pushing, positioning and fixing mechanism 7 are all arranged on the body 1. The support mechanism 2 is used to support the single-piece part A22 and the single-piece part C24; the main board pressing and positioning mechanism 3 is used to position and fix the single-piece part A22; the side pressing and positioning mechanism is used to position and fix the single-piece part B23 and the single-piece part E26 to the side of the single-piece part A22; the first downward pressing and positioning mechanism 5 is used to position and fix the single-piece part C24 and the single-piece part G28; the second downward pressing and positioning mechanism 6 is used to position and fix the single-piece part F27.

[0037] Refer to Figure 4 and Figure 5 , Further, to facilitate the positioning and fixing of the single-piece part D25, the pushing, positioning and fixing mechanism 7 includes a first sliding body 71, a pressing and positioning body 72, a first driving part 73, and a second driving part 74. The first sliding body 71 is slidably connected to the body 1, and the sliding direction of the first sliding body 71 is inclined. Specifically, when the first sliding body 71 slides towards the direction close to the placement position of the single-piece part C24, it slides downward at the same time; the first sliding body 71 is located on the side of the single-piece part C24 away from the single-piece part A22. The pressing and positioning body 72 is slidably arranged on the first sliding body 71, and the sliding direction of the pressing and positioning body 72 is parallel to the length direction of the body 1. The pressing and positioning body 72 is used to position and press the single-piece part D25. The first driving part 73 is arranged on the body 1 and is used to drive the first sliding body 71 to slide; the second driving part 74 is arranged on the first sliding body 71 and is used to drive the pressing and positioning body 72 to slide towards or away from the direction close to the placement position of the single-piece part C24.

[0038] During welding, first place the single-piece component A22 on the support mechanism 2, and position the single-piece component A22 through the main board pressing and positioning mechanism 3; then place the single-piece component C24 on the support mechanism 2 as well, making the end of the single-piece component C24 abut against the end of the single-piece component A22. At this time, the single-piece component C24 and the single-piece component A22 are arranged in sequence in the direction away from the pushing and positioning mechanism; place the single-piece components B23 and E26 on the side pressing and positioning mechanism, and position the single-piece components B23 and E26 through the side pressing and positioning mechanism; hang the single-piece component D25 on the pressing and positioning body 72 for positioning, and then place the single-piece component F27 at the corresponding position inside the single-piece component A22. If it is a T model, two single-piece components G28 also need to be placed at the corresponding positions on the inner bottom walls of the single-piece component A22 and the single-piece component C24 respectively. Then fix the single-piece component A22 through the main board pressing and positioning mechanism 3, fix the single-piece components B23 and E26 through the side pressing and positioning mechanism, fix the single-piece components C24 and G28 through the first downward pressing and positioning mechanism 5, and position and fix the single-piece component F27 through the second downward pressing and positioning mechanism 6; drive the pressing and positioning body 72 through the second driving member 74 to drive the fitting edge 251 of the single-piece component D25 to extend into the single-piece component C24, and then drive the first sliding body 71 through the first driving member 73 to drive the pressing and positioning body 72 and the single-piece component D25 to move closer to the single-piece component C24 and move downward at the same time, so that the fitting edge 251 fits against the inner wall of the single-piece component C24, thereby enabling quick positioning and clamping of each component. In particular, the multiple fitting edges 251 of the single-piece component D25 can quickly and accurately fit through displacement changes in multiple directions, avoiding the lapping and misalignment of the single-piece component D25 and the single-piece component C24, and ensuring the clamping and positioning efficiency to a certain extent.

[0039] Refer to Figure 4 and Figure 5 To facilitate the support of the single-piece components A22 and C24, the support mechanism 2 includes a plurality of support seats 201. The plurality of support seats 201 are all fixedly arranged on the surface of the machine body 1, and the distribution of the plurality of support seats 201 is set according to the shapes of the single-piece components A22 and C24. The support seats 201 are used to support the single-piece component A22 or the single-piece component C24; specifically, the support seats 201 abut against the bottom wall of the single-piece component A22 or the single-piece component C24 at the corresponding position.

[0040] During welding, the single-piece component A22 and the single-piece component C24 are placed on the support base 201 at corresponding positions. The support base 201 can support the single-piece component A22 and the single-piece component C24 to keep them in a horizontal state for subsequent welding. To improve the positioning effect, a side limiting seat can also be provided on the machine body 1 as needed. The side limiting seat is used to abut against the outer side wall of the single-piece component A22 or the single-piece component C24.

[0041] Referring to Figure 5 and Figure 6 , to facilitate the positioning and fixing of the single-piece component A22, the main board pressing and positioning mechanism 3 includes a main board main positioning pin 31, a main board mating positioning pin 32, and a pressing component 33. The main board main positioning pin 31 and the main board mating positioning pin 32 are respectively fixed on any two support bases 201 that support the single-piece component A22. Specifically, the main board main positioning pin 31 is located on the side of the main board mating positioning pin 32 away from the single-piece component C24. The cross-section of the main board main positioning pin 31 is circular, and the diameter of the main board main positioning pin 31 decreases from bottom to top. The maximum diameter of the main board main positioning pin 31 matches the diameter of the positioning hole of the single-piece component A22. The cross-section of the main board mating positioning pin 32 is hexagonal, and the distance between the opposite sides of the main board mating positioning pin 32 decreases from bottom to top. The maximum length of the cross-section of the main board mating positioning pin 32 matches the diameter of the positioning hole of the single-piece component A22. Further, the direction of the maximum length of the cross-section of the main board mating positioning pin 32 is perpendicular to the extending direction of the single-piece component A22.

[0042] When the single-piece component A22 is placed on the support base 201, the two positioning holes on the single-piece component A22 are respectively aligned with the main board main positioning pin 31 and the main board mating positioning pin 32. The single-piece component A22 is moved downward until it abuts against the top wall of the support base 201. At this time, the main board main positioning pin 31 and the main board mating positioning pin 32 pass through the positioning holes at the corresponding positions of the single-piece component A22. Since the opposite sides in the direction of the maximum length of the main board mating positioning pin 32 abut against the inner wall of the positioning hole at the corresponding position of the single-piece component A22, the horizontal movement and rotation of the single-piece component A22 are restricted, and at the same time, the resistance during downward movement is small, realizing the positioning of the single-piece component A22.

[0043] Referring to Figure 5 and Figure 6 , to facilitate the positioning of the single-piece component C24, a part main positioning pin and a part mating positioning pin are respectively fixed on any two support bases 201 that support the single-piece component C24. Among them, the structure of the part main positioning pin is the same as that of the main board main positioning pin 31, and the structure of the part mating positioning pin is the same as that of the main board mating positioning pin 32.

[0044] Referring to Figure 5 and Figure 7, The pressing component 33 is arranged on the machine body 1 and is used to press the single-piece component A22 onto a plurality of supporting seats 201. Specifically, the number of the pressing components 33 can be set as required. In the embodiment of the present invention, two groups of pressing components 33 are provided. One group is located at one end of the single-piece component A22 away from the single-piece component C24, and the other is located in the middle of the single-piece component A22, which helps to improve the pressing effect of the single-piece component A22.

[0045] Referring to Figure 5 and Figure 7 , for facilitating the pressing of the single-piece component A22 onto a plurality of supporting seats 201, a first upright seat 30 is fixed on the machine body 1, and the first upright seat 30 corresponds to the pressing component 33 one by one; the pressing component 33 includes a main board adjusting arm 331, a main board pressing arm 332, a main board pressing seat 333 and an eighth driving member 334. The main board adjusting arm 331 is hinged on the corresponding first upright seat 30 on the machine body 1, and the hinge axis of the main board adjusting arm 331 is parallel to the horizontal direction. Specifically, the hinge axis of the main board adjusting arm 331 at one end of the single-piece component A22 away from the single-piece component C24 is perpendicular to the length direction of the single-piece component A22, while the hinge axis of the main board adjusting arm 331 in the middle of the single-piece component A22 is parallel to the length direction of the single-piece component A22; the main board pressing arm 332 is hinged to one end of the main board adjusting arm 331 away from the first upright seat 30, and the hinge axis of the main board pressing arm 332 is parallel to the hinge axis of the corresponding main board adjusting arm 331. The distance from the end of the main board pressing arm 332 close to the single-piece component A22 to its own hinge is greater than the distance from the end of the main board pressing arm 332 away from the single-piece component A22 to its own hinge. The eighth driving member 334 is used to drive the end of the main board pressing arm 332 away from the single-piece component A22 to move up or down. A plurality of main board pressing seats 333 are provided, and the plurality of main board pressing seats 333 are all fixedly arranged on the corresponding main board pressing arm 332. Specifically, the shape and structure of the main board pressing seat 333 can be set as required so as to be able to abut against the bottom wall and the inner side wall of the single-piece component A22; to ensure that the single-piece component A22 is not easily deformed, the supporting seats 201 corresponding to the single-piece component A22 all correspond to the main board pressing seats 333, so that the single-piece component A22 is evenly pressed and not easily deformed.

[0046] Referring to Figure 7 , for facilitating the driving of the end of the main board pressing arm 332 away from the single-piece component A22 to move up or down, the second driving member 74 adopts a cylinder, and the end of the main board pressing arm 332 away from the single-piece component A22 is hinged and matched with the corresponding cylinder. In other embodiments, the cylinder can be replaced by an electric cylinder, an electric push rod, etc.

[0047] In the initial state, the cylinder piston rod of the eighth driving member 334 is in the retracted state. The eighth driving member 334 pulls the lower pressing arm 332 of the main board to move downward at the end away from the single-piece component A22. Through the rotational cooperation of the main board adjusting arm 331, the end of the lower pressing arm 332 of the main board close to the support seat 201 tilts upward, facilitating the placement of the single-piece component A22.

[0048] After the single-piece component A22 is placed on the support seat 201, the eighth driving member 334 is activated. The cylinder of the eighth driving member 334 drives the end of the lower pressing arm 332 of the main board away from the single-piece component A22 to move upward. Through the cooperation of the main board adjusting arm 331, the lower pressing arm 332 of the main board drives the lower pressing seat 333 of the main board to rotate downward, so that the lower pressing seat 333 of the main board abuts against the inner bottom wall or the inner side wall of the single-piece component A22 at the corresponding position, thereby clamping the single-piece component A22 through the cooperation of the lower pressing seat 333 of the main board and the support seat 201.

[0049] Refer to Figure 4 、 Figure 8 and Figure 9 For the convenience of positioning and fixing the single-piece component B23 and the single-piece component E26, the side pressing and positioning mechanism includes a first side pressing and positioning component 41 and a second side pressing and positioning component 42. The first side pressing and positioning component 41 corresponds to the single-piece component B23, and the second side pressing and positioning component 42 corresponds to the single-piece component E26. Specifically, a second upright seat 34 is fixed on the machine body 1. The second upright seat 34 is located below the single-piece component A22 and extends beyond the single-piece component A22, so as to make reasonable use of the space.

[0050] Refer to Figure 4 and Figure 8 Specifically, the first side pressing and positioning component 41 includes a second sliding body 411, a second pressing block 412, and a third driving member 413. The second sliding body 411 is slidably sleeved on the end of the second upright seat 34 that extends beyond the single-piece component A22. The second sliding body 411 moves in a direction close to or away from the single-piece component A22. Specifically, the sliding direction of the second sliding body 411 is perpendicular to the length direction of the single-piece component A22. The second pressing block 412 is fixed on the second sliding body 411. The second pressing block 412 is used to abut against the side of the single-piece component B23 away from the single-piece component A22. Specifically, the second pressing block 412 includes a first pressing block and a second pressing block. There is a certain distance between the first pressing block and the second pressing block. A limiting groove 45 is formed on the upper surface of the second sliding body 411. The first pressing block and the second pressing block are located above the limiting groove 45, thereby forming a limiting cavity. The limiting groove 45 is used for one end of the single-piece component B23 to extend into. The width of the limiting groove 45 is equal to the width of the single-piece component B23. The third driving member 413 is arranged on the second upright seat 34. The third driving member 413 is used to drive the second sliding body 411 to move.

[0051] Refer to Figure 8, for facilitating the sliding of the second sliding body 411, the third driving member 413 is a cylinder installed on the second vertical seat 34, and the second sliding body 411 is fixedly connected to the piston rod of the corresponding cylinder. In other embodiments, the cylinder can be replaced with an electric cylinder, an electric push rod, etc.

[0052] In the initial state, the piston rod of the cylinder of the third driving member 413 is in the extended state, so that the second pressing block 412 is in a state away from the placement position of the single-piece component A22; during welding, the L-shaped single-piece component B23 is placed in the limiting groove 45, and the surface of the second pressing block 412 close to the single-piece component A22 abuts against the single-piece component B23, and the bottom wall of the second pressing block 412 also abuts against the single-piece component B23. The top wall of the limiting groove 45 and the second pressing block 412 cooperate to position the single-piece component B23, so that the single-piece component B23 can be stably placed. Then, the cylinder of the third driving member 413 is started, and the third driving member 413 drives the second sliding seat 17 to drive the second pressing block 412 and the single-piece component B23 to approach the side wall of the single-piece component A22 until the second pressing block 412 presses the single-piece component B23 against the side wall of the single-piece component A22, so as to fix the single-piece component B23, facilitating subsequent welding operations.

[0053] Refer to Figure 4 and Figure 9 , the side pressing and positioning assembly two 42 is used to position and fix the single-piece component E26 to the side of the single-piece component A22. A third vertical seat 35 is fixed on the machine body 1. The third vertical seat 35 is located below the placement position of the single-piece component A22 and extends out of the single-piece component A22; the side pressing and positioning assembly two 42 includes a third sliding body 421, a second positioning pin 422, a third pressing block 423 and a fourth driving member 424. The third sliding body 421 is slidably sleeved on the third vertical seat 35, and the third sliding body 421 moves in a direction approaching or away from the single-piece component A22. Specifically, the sliding direction of the third sliding body 421 is perpendicular to the plane where the corresponding side wall of the single-piece component A22 is located; a plurality of second positioning pins 422 are provided, and the plurality of second positioning pins 422 are all fixed on the third sliding body 421. The second positioning pins 422 are used to pass through the positioning holes on the single-piece component E26. In the embodiment of the present invention, two second positioning pins 422 are provided for hanging the single-piece component E26; the third pressing block 423 is fixed on the third sliding body 421, and a plurality of third pressing blocks 423 are distributed as needed to leave a welding position; the third pressing block 423 is used to abut against the side of the single-piece component E26 away from the single-piece component A22, and the fourth driving member 424 is arranged on the third vertical seat 35. The fourth driving member 424 is used to drive the third sliding body 421 to slide.

[0054] Refer to Figure 9, for facilitating the sliding of the third sliding body 421, the fourth driving member 424 is a cylinder mounted on the third vertical seat 35, and the third sliding body 421 is fixedly connected to the piston rod of the corresponding cylinder. In other embodiments, the cylinder can be replaced with an electric cylinder, an electric push rod, etc.

[0055] In the initial state, the piston rod of the cylinder of the fourth driving member 424 is in the extended state, so that the third pressing block 423 and the second positioning pin 422 are in a state away from the placement position of the single-piece component A22; during welding, the two positioning holes of the single-piece component E26 are hung on the two second positioning pins 422, and the surface of the third pressing block 423 close to the single-piece component A22 abuts against the corresponding position of the single-piece component E26, realizing the positioning of the single-piece component E26; then, the cylinder of the fourth driving member 424 is started, and the fourth driving member 424 drives the third sliding seat 17 to drive the third pressing block 423, the second positioning pin 422 and the single-piece component E26 to approach the side wall of the single-piece component A22 until the third pressing block 423 presses the single-piece component E26 against the side wall of the single-piece component A22. Since the single-piece component E26 has an arc surface, when the single-piece component E26 is pressed against the side wall of the single-piece component A22, the second positioning pin 422 will not interfere with the single-piece component A, thus realizing the rapid positioning and fixing of the single-piece component E26.

[0056] Refer to Figure 5 and Figure 10 , for facilitating the positioning and fixing of the single-piece component C24 and the single-piece component G28, the first downward pressing and positioning mechanism 5 corresponds to the single-piece component G28 one by one, and the position of the first downward pressing and positioning mechanism 5 is aligned with the welding position of the corresponding single-piece component G28. The fourth vertical seat 36 is fixed on the machine body 1, and the fourth vertical seat 36 corresponds to the first downward pressing and positioning mechanism 5 one by one.

[0057] Refer to Figure 5 and Figure 10, specifically, each first pressing and positioning mechanism 5 includes a first adjusting arm 51, a first pressing arm 52, a first pressing seat 53, a first pressing positioning pin 54, a limiting seat 55, a fourth pressing block 56, and a fifth driving member 57. The first adjusting arm 51 is hinged to the corresponding fourth vertical seat 36, and the hinge axis of the first adjusting arm 51 is parallel to the extending direction of the single-piece component A22. The first pressing arm 52 is hinged to the end of the corresponding first adjusting arm 51 away from the machine body 1. The fifth driving member 57 is fixedly installed on the corresponding fourth vertical seat 36, and the fifth driving member 57 is used to drive the end of the first pressing arm 52 away from the single-piece component A22 to move up or down; the first pressing seat 53 is fixed on the first pressing arm 52, and a plurality of first pressing seats 53 are provided to facilitate pressing the single-piece component G28. Specifically, the arrangement of the plurality of first pressing seats 53 is set according to needs. The first pressing positioning pin 54 is fixed on the first pressing seat 53, and the first pressing positioning pin 54 is used to extend into the positioning hole on the corresponding single-piece component G28. When the single-piece component G28 is in the welding position, the upper surface at the positioning hole of the single-piece component G28 and the hinge center where the first adjusting arm 51 is hinged to the fourth vertical seat 36 are on the same horizontal plane, so as to ensure that when the first pressing arm 52 rotates, the first pressing positioning pin 54 will not get stuck, and the first pressing positioning pin 54 can be in a vertical state when extending into the positioning hole on the single-piece component G28.

[0058] Refer to Figure 5 and Figure 10 , two limiting seats 55 are provided, and the two limiting seats 55 are relatively fixed on the first pressing arm 52. Specifically, the two limiting seats 55 are located on both sides of the convex position of the corresponding single-piece component G28, and the two limiting seats 55 are used to limit the relative two sides of the single-piece component G28. The fourth pressing block 56 is fixed on the first pressing arm 52, and the fourth pressing block 56 is used to abut against the edge of the corresponding single-piece component C24 or the edge 221 of the single-piece component A22. The number of the fourth pressing blocks 56 can be set according to needs.

[0059] Refer to Figure 10 , to facilitate driving the end of the first pressing arm 52 away from the single-piece component A22 to move up or down, the fifth driving member 57 uses a cylinder, and the end of the first pressing arm 52 away from the single-piece component A22 is hinged and matched with the corresponding cylinder. In other embodiments, the cylinder can be replaced with an electric cylinder, an electric push rod, etc.

[0060] In the initial state, the cylinder piston rod of the fifth driving member 57 is in the retracted state. The fifth driving member 57 pulls the first pressing arm 52 to move downward at the end away from the single-piece component A22. Through the rotational cooperation of the first adjusting arm 51, the end of the first pressing arm 52 close to the support seat 201 tilts upward to facilitate the placement of the single-piece component C24. When the single-piece component A22 and the single-piece component C24 are placed on the support seat 201, for the T model, after two single-piece components G are respectively placed at the required positions on the inner bottom walls of the single-piece component A22 and the single-piece component C24, the fifth driving member 57 is activated. The cylinder of the fifth driving member 57 drives the end of the first pressing arm 52 away from the single-piece component A22 to move upward. Through the cooperation of the first adjusting arm 51, the first pressing arm 52 drives the first pressing seat 53 to abut against the upper surface of the single-piece component G28 at the corresponding position. At the same time, the first pressing positioning pin 54 enters the corresponding positioning hole of the single-piece component G28, and the limit seat 55 moves to the opposite sides of the single-piece component G28 and abuts against both sides of the corresponding single-piece component G28, thereby realizing the positioning and fixing of the single-piece component G28. At the same time, the fourth pressing block 56 abuts against the upper surface of the overlap 221 of the single-piece component A22 or the single-piece component C24 at the corresponding position, thereby pressing the single-piece component A22 or the single-piece component C24 at the corresponding position to a certain extent.

[0061] Refer to Figure 5 and Figure 11, for facilitating the positioning and fixing of the single-piece component F27, a fifth upright seat 37 is fixed on the machine body 1. The second downward pressing and positioning mechanism 6 includes a second adjusting arm 61, a second downward pressing arm 62, a second downward pressing seat 63, a second downward pressing positioning pin 64, and a sixth driving member 65. The second adjusting arm 61 is hinged on the fifth upright seat 37, and the hinge axis of the second adjusting arm 61 is parallel to the extending direction of the single-piece component F27. The second downward pressing arm 62 is hinged to the end of the second adjusting arm 61 away from the machine body 1. The sixth driving member 65 is installed on the fifth upright seat 37, and the sixth driving member 65 is used to drive the end of the second downward pressing arm 62 away from the single-piece component A22 to move upward or downward. The sixth driving member 65 uses a cylinder, and the end of the second downward pressing arm 62 away from the single-piece component A is hinged to the corresponding cylinder piston rod. The cylinder can be replaced with an electric cylinder or the like. A plurality of second downward pressing seats 63 are provided, and the plurality of second downward pressing seats 63 are all fixed on the second downward pressing arm 62. The number and distribution of the plurality of second downward pressing seats 63 can be set as required to press the single-piece component F27. The second downward pressing positioning pin 64 is fixed on the second downward pressing arm 62, and the second downward pressing positioning pin 64 is used to extend into the positioning hole on the corresponding single-piece component F27. When the single-piece component F27 is at the welding position, the upper surface of the single-piece component F27 at the corresponding positioning hole and the hinge center of the second adjusting arm 61 hinged on the fifth upright seat 37 are located on the same horizontal plane, so as to ensure that when the second downward pressing arm 62 rotates, the second downward pressing positioning pin 64 will not get stuck, and the second downward pressing positioning pin 64 can be in a vertical state when extending into the positioning hole on the single-piece component F27.

[0062] Refer to Figure 5 and Figure 11 , as required, a plurality of second downward pressing and positioning mechanisms 6 can also be provided to improve the pressing effect. In the embodiment of the present invention, there are two groups of second downward pressing and positioning mechanisms 6, and the two groups of second downward pressing and positioning mechanisms 6 are located on the same side of the single-piece component A22.

[0063] Refer to Figure 5 and Figure 12 , to facilitate guiding the sliding of the first sliding body 71, a guide rail 29 is fixed on the machine body 1. The horizontal length direction of the guide rail 29 is parallel to the length direction of the machine body 1. Specifically, the guide rail 29 is inclined, and the end of the guide rail 29 close to the single-piece component C24 is inclined downward, and the inclination angle is less than 10°. The first sliding body 71 is slidably engaged with the guide rail 29.

[0064] Refer to Figure 5 and Figure 12 , to facilitate driving the first sliding body 71 to move, the first driving member 73 uses a cylinder, and the first sliding body 71 is fixedly connected to the piston rod of the corresponding cylinder. In other embodiments, the cylinder can be replaced with an electric cylinder or an electric push rod or the like.

[0065] Refer toFigure 5 and Figure 12 For the convenience of positioning and fixing the single-piece component D25, among them, the pressing and positioning body 72 includes an installation body 721, a first positioning pin 722 and a first pressing block 723. The installation body 721 is slidably arranged on the first sliding body 71, and the sliding direction of the installation body 721 is parallel to the length direction of the machine body 1. The second driving member 74 is arranged on the first sliding body 71 and is used to drive the installation body 721 to slide. Specifically, the second driving member 74 adopts a cylinder, and the installation body 721 is fixedly connected to the piston rod of the corresponding cylinder. In other embodiments, the cylinder can be replaced by an electric cylinder or an electric push rod, etc.

[0066] Referring to Figure 12 , a plurality of first positioning pins 722 are provided. The plurality of first positioning pins 722 are all fixed on the installation body 721. The plurality of first positioning pins 722 are used to pass through the positioning holes on the single-piece component D25, and the first positioning pins 722 are misaligned with the single-piece component C24. In the embodiment of the present invention, two first positioning pins 722 are provided; the first pressing block 723 is fixed on the installation body 721, and the first pressing block 723 is used to abut against the side of the single-piece component D25 away from the single-piece component C24.

[0067] In the initial state, the first sliding body 71, the installation body 721, the first pressing block 723 and the first positioning pins 722 are all in a state away from the placement position of the single-piece component C24. During welding, the single-piece component D25 is hung on the two first positioning pins 722 corresponding to the two positioning holes, and the surface of the first pressing block 723 close to the single-piece component C24 abuts against the corresponding position of the single-piece component D25 to realize the positioning of the single-piece component D25; then start the cylinder of the second driving member 74, and the second driving member 74 drives the installation body 721 to drive the first pressing block 723, the first positioning pins 722 and the single-piece component D25 to approach the single-piece component C24, so that the fitting edge 251 of the single-piece component D25 extends into the single-piece component C24. Then start the cylinder of the first driving member 73 to drive the first sliding body 71 to drive the pressing and positioning body 72 as a whole and the single-piece component D25 to approach the single-piece component C24 and move downward at the same time, so that the fitting edge 251 fits against the inner wall of the single-piece component C24, so that the multiple fitting edges 251 of the single-piece component D25 can be quickly and accurately fitted without overlapping and misaligning with the single-piece component C24, which can ensure the clamping and positioning efficiency to a certain extent.

[0068] Referring to Figures 7 - 12 , the first driving member 73, the second driving member 74, the third driving member 413, the fourth driving member 424 and the eighth driving member 334 are all operated through the control valve rod on the machine body 1, while the fifth driving member 57 and the sixth driving member 65 are controlled by manually operating the first pressing arm 52 and the second pressing arm 62.

[0069] Referring toFigure 5 , Figures 8 - 12 , the automatic positioning system further includes a detection mechanism, which includes a first proximity switch 8, a second proximity switch 9, a third proximity switch 10, a fourth proximity switch 11, a fifth proximity switch 12, a sixth proximity switch 13, a seventh proximity switch 14 and a vehicle type judgment proximity switch 15. There are multiple first proximity switches 8, and the multiple first proximity switches 8 are fixedly installed on the support base 201 of the single-piece component A22. The first proximity switch 8 is used to detect the single-piece component A22; the second proximity switch 9 is fixedly installed on the second pressing block 412, and the second proximity switch 9 is used to detect the single-piece component B23; the third proximity switch 10 is installed on the third sliding body 421, and the third proximity switch 10 is used to detect the single-piece component E26; the fourth proximity switch 11 is installed on the first lower pressing seat 53, and the fourth proximity switch 11 is used to detect the single-piece component G28. The fifth proximity switch 12 is installed on the first lower pressing arm 52 corresponding to the single-piece component C24, and the fifth proximity switch 12 is used to detect the single-piece component C24. At the same time, the fifth proximity switch 12 can also be installed on the support base 201 of the single-piece component C24; the sixth proximity switch 13 is arranged on the second lower pressing arm 62, and the sixth proximity switch 13 is used to detect the single-piece component F27; the seventh proximity switch 14 is arranged on the pressing and positioning body 72, and the seventh proximity switch 14 is used to detect the single-piece component D25. The vehicle type judgment proximity switch 15 is installed on the second lower pressing arm 62 near the flash 222. When the second lower pressing arm 62 near the flash 222 is in the pressing state, the vehicle type judgment proximity switch 15 is aligned with the flash 222, and the vehicle type judgment proximity switch 15 is used to detect the flash 222 on the single-piece component A22. Further, the first proximity switch 8, the second proximity switch 9, the third proximity switch 10, the fourth proximity switch 11, the fifth proximity switch 12, the sixth proximity switch 13, the seventh proximity switch 14 and the vehicle type judgment proximity switch 15 all have indicator lights and are all wirelessly connected to an external control platform, which helps the operators to timely judge whether each component is in place.

[0070] The implementation principle of Embodiment 1 of the present invention is as follows: during welding, the main board lower pressing arm 332, the first lower pressing arm 52 and the second lower pressing arm 62 are all in the upwardly tilted state, and the first sliding body 71, the second sliding body 411 and the third sliding body 421 are all on the side far from the placement position of the single-piece component A22, so as to provide enough space for the placement of the components.

[0071] During welding, first place the single-piece component A22 on the corresponding multiple support seats 201, and sleeve the two positioning holes of the single-piece component A22 on the main positioning pin 31 of the main board and the mating positioning pin 32 of the main board to achieve positioning. At this time, the first proximity switch 8 detects the single-piece component A22, and the indicator light of the first proximity switch 8 lights up; then place the single-piece component C24 on the corresponding support seat 201 as well, so that the two positioning holes of the single-piece component C24 are also sleeved on the part main positioning pin and the part mating positioning pin to position the single-piece component C24. At this time, the end of the single-piece component C24 abuts against the end of the single-piece component A22. Then place the single-piece component B23 in the limiting groove 45 of the second pressing block 412. The second proximity switch 9 detects the single-piece component B23 and its corresponding indicator light lights up. Hang the single-piece component E26 on the corresponding two second positioning pins 422. The third proximity switch 10 detects the single-piece component E26 and its indicator light lights up; then sleeve the single-piece component D25 on the corresponding two first positioning pins 722. The sixth proximity switch 13 detects the single-piece component D25 and its indicator light lights up; then place the single-piece component F27 at the corresponding position inside the single-piece component A22. For T models, two single-piece components G28 need to be placed at the corresponding positions inside the single-piece component A22 and the single-piece component C24 respectively.

[0072] Next, start the pressing component 33 to press and fix the single-piece component A22. Drive the second sliding body 411 and the third sliding body 421 to approach the single-piece component A22 through the third driving member 413 and the fourth driving member 424, so as to press and fix the single-piece component B23 and the single-piece component E26. Drive the first pressing arm 52 and the second pressing arm 62 to rotate downward respectively through the fifth driving member 57 and the sixth driving member 65, so as to fix and press the single-piece component C24, the single-piece component G28 and the single-piece component F27. At this time, the fourth proximity switch 11 detects the single-piece component G28 and its indicator light lights up, the fifth proximity switch 12 detects the single-piece component C and its indicator light lights up, and the sixth proximity switch 13 detects the single-piece component F27 and its corresponding indicator light lights up. At the same time, drive the pressing and positioning body 72 through the second driving member 74 to drive the fitting edge 251 of the single-piece component D25 to extend into the single-piece component C24. Then, drive the first sliding body 71 through the first driving member 73 to drive the pressing and positioning body 72 and the single-piece component D25 to approach the single-piece component C24 and move downward at the same time, so that the fitting edge 251 fits with the inner wall of the single-piece component C24. The vehicle model judgment proximity switch 15 transmits a signal to the external control platform so that the welding system can judge the current vehicle model. If it is a T vehicle model, the indicator light at the vehicle model judgment proximity switch 15 lights up, so that each component can be quickly positioned and clamped. Especially, the multiple fitting edges 251 of the single-piece component D25 can quickly and accurately fit through the displacement changes in multiple directions, avoiding the lap dislocation with the single-piece component C24 to a certain extent and ensuring the clamping and positioning efficiency to a certain extent.

[0073] Embodiment 2:

[0074] Referring to Figure 5 and Figure 13 This embodiment is different from Embodiment 1 in that the side pressing and positioning mechanisms are respectively in one-to-one correspondence with the single-piece component B23 and the single-piece component E26. Each side pressing and positioning mechanism includes a fixed seat 16, a sliding seat 17, a suction cup 18, an unlocking channel 19, a sealing block 20, a seventh driving member 21 and an adjusting component. Among them, the fixed seat 16 is fixedly arranged on the machine body 1. One side of the fixed seat 16 is located below the single-piece component A22, and the other side is located outside the single-piece component A22. The sliding seat 17 is slidably penetrated through one end of the fixed seat 16 located outside the single-piece component A22. The sliding seat 17 is aligned with the required position of the single-piece component A22. The sliding seat 17 moves in a direction close to or away from the single-piece component A22. Specifically, the sliding direction of the sliding seat 17 is perpendicular to the plane where the side wall of the single-piece component A22 is located. The seventh driving member 21 is arranged on the fixed seat 16 and is used to drive the sliding seat 17 to slide. Specifically, the seventh driving member 21 is a cylinder, and the sliding seat 17 is fixedly connected to the piston rod of the corresponding cylinder. In other embodiments, the cylinder can also be replaced with an electric cylinder, an electric push rod, etc.

[0075] Referring toFigure 5 , Figure 13 and Figure 14 , the suction cup 18 is a rubber suction cup. The suction cup 18 is fixed on one side of the sliding seat 17 close to the placement position of the single-piece component A22. The suction cup 18 is used to adsorb the corresponding single-piece component B23 or single-piece component E26, so as to be able to adapt to components with different shapes and structures; the unlocking channel 19 is fixed in the sliding seat 17, and the unlocking channel 19 is internally communicated with the suction cup 18. The sealing block 20 is slidably arranged in the fixed seat 16. Specifically, a telescopic rod 48 is fixed between the bottom wall of the fixed seat 16 and the sealing block 20. The extending direction of the telescopic rod 48 is parallel to the sliding direction of the sliding seat 17. The sealing block 20 is used to open or block the unlocking channel 19, and the adjusting assembly is used to adjust the sliding of the sealing block 20. To ensure the fixing effect, a plurality of pressing columns 46 are fixed on the side of the sliding seat 17 close to the suction cup 18. The pressing columns 46 are used to abut against the corresponding components, and positioning pins can also be arranged on the sliding seat 17 as required.

[0076] Referring to Figure 13 and Figure 14 , to facilitate the adjustment of the movement of the sealing block 20, the adjusting assembly includes a stop block 38, a tension spring 39 and an abutting column 40. There are two relatively arranged stop blocks 38. The two stop blocks 38 slide relatively on one side of the sliding seat 17 close to the fixed seat 16, and the sliding direction of the stop block 38 is perpendicular to the sliding direction of the sliding seat 17. A return spring 47 is arranged between the stop block 38 and the sliding seat 17 to enable the stop block 38 to be reset; a first arc surface 43 is arranged on the side of the two stop blocks 38 close to each other. The distances from the two first arc surfaces 43 to the side of the sliding seat 17 close to the suction cup 18 decrease in the direction of approaching each other. When in the initial state, the return spring 47 is in the natural state, and the side of the stop block 38 close to the suction cup 18 abuts against the side of the sealing block 20 close to the telescopic rod 48; when the side of the stop block 38 close to the suction cup 18 abuts against the sealing block 20, the sealing block 20 blocks the unlocking channel 19.

[0077] Referring to Figure 13 and Figure 4 , the tension spring 39 is arranged in the telescopic rod 48. One end of the tension spring 39 is fixed on the rod body connected to the fixed seat 16, and the other end is fixed on the rod body connected to the sealing block 20. When in the initial state, the tension spring 39 is in the natural state. The abutting column 40 is fixed on the side of the fixed seat 16 away from the telescopic rod 48. The abutting column 40 corresponds to the stop block 38 one by one. The side of the stop block 38 close to the suction cup 18 has a second arc surface 44. The distances from the two second arc surfaces 44 to the side of the sliding seat 17 close to the suction cup 18 increase in the direction of moving away from each other. The abutting column 40 is used to slide relatively with the second arc surface 44. In other embodiments, the adjusting assembly can be replaced by a cylinder, and the sealing block 20 is connected to the piston rod of the corresponding cylinder.

[0078] The implementation principle of Example 2 of the present invention is: in the initial state, the sealing block 20 seals the unlocking channel 19, and the side of the sealing block 20 away from the unlocking channel 19 abuts against the stopper 38, the reset spring 47 is in a natural state, and the tension spring 39 is also in a natural state.

[0079] During welding, the single component B23 or the single component E26 is fixed to the suction cup 18 by suction. At this time, since the unlocking channel 19 is in a sealed state, the suction cup 18 will remain in the suction state. When the single component B23 or the single component E26 approaches the single component A22, the tension spring 39 is gradually stretched. Due to the limiting effect of the stopper 38 on the sealing block 20, the sealing block 20 still blocks the unlocking channel 19. Then the stopper 38 gradually approaches the abutting column 40, and the abutting column 40 and the abutting column 40 are in contact with each other. The second curved surface 44 of the stop block 38 should slide relatively, driving the stop block 38 to slide in the direction away from the sealing block 20 until the single product component B23 or the single product component E26 abuts against the single product component A22. At this time, the abutting column 40 abuts the stop block 38 and moves to be offset from the sealing block 20. Then the stretched tension spring 39 pulls the sealing block 20 away from the unlocking channel 19, thereby releasing the adsorption effect of the suction cup 18, and pressing the single product component B23 or the single product component E26 through the pressure column 46.

[0080] After welding is completed, the sliding seat 17 moves in the opposite direction and approaches the fixed seat 16. Since the suction cup 18 is in the unlocked state, it will not generate a large adsorption force on the parts. Then, the sealing block 20 will not move under the restriction of the telescopic rod 48. As the sliding seat 17 drives the stopper 38 to continue to approach the sealing block 20, the second arc surface 44 disengages from the abutment column 40. Then, the sealing block 20 and the first arc surfaces 43 of the two stops 38 slide relative to each other, driving the two stops 38 to move away from each other, causing the return spring 47 to deform until the stopper 38 moves to the side of the sealing block 20 away from the suction cup 18. At this time, the sealing block 20 extends into the unlocking channel 19 to block the unlocking channel 19. Then, under the action of the return spring 47, the stopper 38 resets and continues to limit the sealing block 20, thereby maintaining the adsorption of the suction cup 18, which is convenient for next use. The side pressure positioning mechanism of this embodiment is simple and convenient, and there is no need to open multiple positioning holes on the parts, and it can be suitable for parts of different shapes.

[0081] The above are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A fixture automatic positioning system based on automotive component welding, characterized in that, Including: Machine body (1); Support mechanism (2) for supporting single-piece component A (22) and single-piece component C (24); Main board pressing and positioning mechanism (3) for positioning and fixing single-piece component A (22); Side pressing and positioning mechanism for positioning and fixing single-piece component B (23) and single-piece component E (26) to the side of single-piece component A (22); First downward pressing and positioning mechanism (5) for positioning and fixing single-piece component C (24) and single-piece component G (28); Second downward pressing and positioning mechanism (6) for positioning and fixing single-piece component F (27); Pushing, positioning and fixing mechanism (7), the pushing, positioning and fixing mechanism (7) includes a first sliding body (71), a pressing and positioning body (72), a first driving member (73) and a second driving member (74), the first sliding body (71) is slidably arranged on the machine body (1), the sliding direction of the first sliding body (71) is inclined, the first sliding body (71) slides downward in the direction approaching the placement position of single-piece component C (24), the pressing and positioning body (72) is slidably arranged on the first sliding body (71), the pressing and positioning body (72) is used for positioning and pressing single-piece component D (25), the first driving member (73) is used for driving the first sliding body (71) to slide, and the second driving member (74) is used for driving the pressing and positioning body (72) to slide in the direction approaching or departing from the placement position of single-piece component C (24).

2. The fixture automatic positioning system based on automobile part welding according to claim 1, wherein: The pressing and positioning body (72) includes a mounting body (721), a first positioning pin (722) and a first pressing block (723), the mounting body (721) is slidably arranged on the first sliding body (71), the second driving member (74) is used for driving the mounting body (721) to slide, a plurality of the first positioning pins (722) are provided, the plurality of first positioning pins (722) are arranged on the mounting body (721), the plurality of first positioning pins (722) are used for passing through the positioning holes on single-piece component D (25), and the first pressing block (723) is arranged on the mounting body (721), the first pressing block (723) is used for abutting against the side of single-piece component D (25) away from single-piece component C (24).

3. The automatic positioning system for jigs based on the welding of automotive parts according to claim 1, characterized in that: The support mechanism (2) includes a plurality of support seats (201), the plurality of support seats (201) are all arranged on the machine body (1), and the support seats (201) are used for supporting single-piece component A (22) or single-piece component C (24).

4. The fixture automatic positioning system based on automobile part welding according to claim 3, wherein: The main board pressing and positioning mechanism (3) includes a main board main positioning pin (31), a main board mating positioning pin (32), and a pressing assembly (33). The main board main positioning pin (31) and the main board mating positioning pin (32) are respectively arranged on any two support seats (201) of the supporting single-piece component A (22). The cross-section of the main board main positioning pin (31) is circular, and the maximum diameter of the main board main positioning pin (31) matches the diameter of the positioning hole on the single-piece component A (22). The cross-section of the main board mating positioning pin (32) is hexagonal, and the maximum length of the cross-section of the main board mating positioning pin (32) matches the diameter of the positioning hole on the single-piece component A (22). The direction of the maximum length of the cross-section of the main board mating positioning pin (32) is perpendicular to the extending direction of the single-piece component A (22). The pressing assembly (33) is used to press the single-piece component A (22) onto the multiple support seats (201).

5. A fixture automatic positioning system based on automotive part welding according to claim 1, characterized in that: The side pressing and positioning mechanism includes a side pressing and positioning component one (41) and a side pressing and positioning component two (42). The side pressing and positioning component one (41) includes a second sliding body (411), a second pressing block (412), and a third driving member (413). The second sliding body (411) is slidably arranged on the machine body (1). The second sliding body (411) moves in a direction approaching or departing from the single-piece component A (22). The second pressing block (412) is arranged on the second sliding body (411). The second pressing block (412) is used to abut against the side of the single-piece component B (23) away from the single-piece component A (22). A limiting groove (45) for the end of the single-piece component B (23) to extend into is formed on the second pressing block (412). The second pressing block (412) is located above the limiting groove (45). The third driving member (413) is used to drive the second sliding body (411) to move. The side pressing and positioning component two (42) is used to position and fix the single-piece component E (26) to the side of the single-piece component A (22).

6. The automatic positioning system for a fixture based on welding of automotive parts according to claim 5, characterized in that: The side pressing and positioning component two (42) includes a third sliding body (421), a second positioning pin (422), a third pressing block (423), and a fourth driving member (424). The third sliding body (421) is slidably arranged on the machine body (1). The third sliding body (421) moves in a direction approaching or departing from the single-piece component A (22). A plurality of second positioning pins (422) are arranged, and all the plurality of second positioning pins (422) are arranged on the third sliding body (421). The second positioning pins (422) are used to pass through the positioning holes on the single-piece component E (26). The third pressing block (423) is arranged on the third sliding body (421). The third pressing block (423) is used to abut against the side of the single-piece component E (26) away from the single-piece component A (22). The fourth driving member (424) is used to drive the third sliding body (421) to slide.

7. The fixture automatic positioning system based on automotive component welding according to claim 1, wherein: The first downward pressing and positioning mechanism (5) corresponds to the single-piece component G (28) one by one. Each first downward pressing and positioning mechanism (5) includes a first adjusting arm (51), a first downward pressing arm (52), a first downward pressing seat (53), a first downward pressing positioning pin (54), a limiting seat (55), a fourth pressing block (56) and a fifth driving member (57). The first adjusting arm (51) is hinged to the machine body (1), and the hinge axis of the first adjusting arm (51) is parallel to the extension direction of the single-piece component A (22). The first downward pressing arm (52) is hinged to the first adjusting arm (51). The fifth driving member (57) is used to drive the end of the first downward pressing arm (52) away from the single-piece component A (22) to move up or down. The first downward pressing seat (53) is arranged on the first downward pressing arm (52), and the first downward pressing seat (53) is used to abut against the single-piece component G (28). The first downward pressing positioning pin (54) is arranged on the first downward pressing seat (53), and the first downward pressing positioning pin (54) is used to extend into the positioning hole on the corresponding single-piece component G (28). When the single-piece component G (28) is located at the welding position, the upper surface at the positioning hole of the single-piece component G (28) and the hinge center where the corresponding first adjusting arm (51) is hinged to the machine body (1) are located on the same horizontal plane. The limiting seat (55) is used to limit the relative two sides of the single-piece component G (28). The fourth pressing block (56) is arranged on the first downward pressing arm (52), and the fourth pressing block (56) is used to abut against the single-piece component A (22) or the single-piece component C (24).

8. The automatic positioning system for fixture based on welding of automotive parts according to claim 1, wherein: The second downward pressing and positioning mechanism (6) includes a second adjusting arm (61), a second downward pressing arm (62), a second downward pressing seat (63), a second downward pressing positioning pin (64) and a sixth driving member (65). The second adjusting arm (61) is hinged to the machine body (1), and the hinge axis of the second adjusting arm (61) is parallel to the extension direction of the single-piece component F (27). The second downward pressing arm (62) is hinged to the second adjusting arm (61). The sixth driving member (65) is used to drive the end of the second downward pressing arm (62) away from the single-piece component A (22) to move up or down. A plurality of second downward pressing seats (63) are arranged, and all the plurality of second downward pressing seats (63) are arranged on the second downward pressing arm (62). The second downward pressing seat (63) is used to abut against the single-piece component F (27). The second downward pressing positioning pin (64) is arranged on the second downward pressing seat (63), and the second downward pressing positioning pin (64) is used to extend into the positioning hole of the corresponding single-piece component F (27). When the single-piece component F (27) is located at the welding position, the upper surface at the corresponding positioning hole of the single-piece component F (27) and the hinge center where the second adjusting arm (61) is hinged to the machine body (1) are located on the same horizontal plane.

9. A fixture automatic positioning system based on automobile part welding according to any one of claims 1-8, characterized in that: The fixture automatic positioning system further includes a detection mechanism. The detection mechanism includes a first proximity switch (8), a second proximity switch (9), a third proximity switch (10), a fourth proximity switch (11), a fifth proximity switch (12), a sixth proximity switch (13), a seventh proximity switch (14), and a vehicle model judgment proximity switch (15). A plurality of the first proximity switches (8) are provided, and the plurality of first proximity switches (8) are used to detect the single-piece component A (22). The second proximity switch (9) is used to detect the single-piece component B (23); the third proximity switch (10) is used to detect the single-piece component E (26); the fourth proximity switch (11) is used to detect the single-piece component G (28), the fifth proximity switch (12) is used to detect the single-piece component C (24); the sixth proximity switch (13) is used to detect the single-piece component F (27); the seventh proximity switch (14) is used to detect the single-piece component D (25), and the vehicle model judgment proximity switch (15) is used to detect the flash (222) on the single-piece component A (22).

10. A fixture automatic positioning system based on automotive component welding according to claim 1, characterized in that: The side pressing and positioning mechanism corresponds to the single-piece component B (23) and the single-piece component E (26) one by one. Each side pressing and positioning mechanism includes a fixed seat (16), a sliding seat (17), a suction cup (18), an unlocking channel (19), a sealing block (20), a seventh driving member (21), and an adjusting component. The fixed seat (16) is arranged on the machine body (1). The sliding seat (17) is slidably penetrated through the fixed seat (16). The sliding seat (17) moves in a direction close to or away from the single-piece component A (22). The seventh driving member (21) is used to drive the sliding seat (17) to slide. The suction cup (18) is arranged on the sliding seat (17). The suction cup (18) is used to adsorb the corresponding single-piece component B (23) or single-piece component E (26). The unlocking channel (19) is arranged in the sliding seat (17). The unlocking channel (19) is internally communicated with the suction cup (18). The sealing block (20) is slidably arranged in the fixed seat (16). The sealing block (20) is used to open or seal the unlocking channel (19). The adjusting component is used to adjust the sliding of the sealing block (20).

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