Integrated enclosing welding device for automobile backrest frame body

Abstract

The invention discloses an automobile backrest frame body integrated enclosure welding device which comprises a machining platform, a first positioning device, a second positioning device, a third positioning device, a fourth positioning device, a fifth positioning device, a sixth positioning device, a seventh positioning device, a pressing device, a pushing device and a frame body. Each positioning device is provided with a limiting installation base corresponding to the frame body, the frame body is detachably installed on the machining platform through the limiting installation bases, different parts are arranged on different areas of the frame body, and the positioning devices are arranged corresponding to the different parts on the frame body respectively and position the parts on the frame body. The pressing devices are arranged along the outline of the frame body and apply acting force to the frame body, and the pushing devices are located under the frame body along the outline of the frame body. By the adoption of the integrally-formed backrest frame structure, the number of welding seams and splicing links are reduced, and uniform distribution of the structural strength of the frame body is achieved.

Description

Technical Field

[0001] This invention belongs to the field of automotive parts processing technology, and more specifically, it is a device for integrally welding the body of an automotive backrest frame. Background Technology

[0002] The current mainstream forming method for automotive seat backrest frames is a multi-beam splicing and welding structure. This involves sequentially splicing and welding four beams—the left side beam, right side beam, bottom beam, and top connecting beam—to form the complete backrest frame body. However, this four-beam sequential splicing and welding structure design has many inherent defects, severely restricting the performance improvement and production efficiency optimization of the backrest frame. On the one hand, multi-beam splicing and welding requires multiple butt welds, which can easily become weak points in the structure. This not only leads to uneven distribution of the overall structural strength of the frame but also easily causes stress concentration in the weld area, potentially resulting in safety hazards such as weld cracking and frame deformation during long-term use. On the other hand, during the process of multiple splicing and welding, the positioning errors of each beam will gradually accumulate, making it difficult to guarantee the overall dimensional accuracy of the backrest frame. This results in poor consistency of the assembly benchmark of the frame body, severely affecting the installation and positioning accuracy of subsequent auxiliary components. At the same time, the splicing and welding process is cumbersome, requiring precise alignment and welding operations for each butt joint. This not only increases the complexity of the production process and reduces production efficiency but also causes irreversible deformation of the beams due to heat input during welding, requiring additional correction processes and further increasing production costs. In addition, the reliability of the connection between the beams of the spliced ​​frame depends on the welding quality. Even small fluctuations in welding parameters can affect the connection stability, making it difficult to meet the consistency requirements of mass production of parts in the automotive industry. Summary of the Invention

[0003] Purpose of the invention: To overcome the shortcomings of the existing technology, the present invention provides an integrated welding device for the body of an automobile backrest frame; by adopting an integrated backrest frame structure, the number of welds and splicing links are reduced, and the uniform distribution of the structural strength of the frame body is achieved; by setting each positioning device to correspond to different components on the frame body and jointly constraining the frame body, the misalignment of auxiliary components caused by the reference deviation of the traditional spliced ​​frame is avoided.

[0004] Technical Solution: To achieve the above objectives, the present invention provides an integrated welding device for an automotive backrest frame, comprising a processing platform, a first positioning device, a second positioning device, a third positioning device, a fourth positioning device, a fifth positioning device, a sixth positioning device, a seventh positioning device, a pressing device, a pushing device, and a frame body. Each positioning device is provided with a limiting mounting seat corresponding to the frame body. The frame body is detachably mounted on the processing platform via each limiting mounting seat. Different components are provided on different areas of the frame body. Each positioning device is provided corresponding to a different component on the frame body and positions each component at its corresponding position on the frame body. A plurality of pressing devices are distributed along the contour of the frame body on the inner or outer side of the frame body, and each applies a force to the upper surface of the frame body pointing towards the processing platform. A plurality of pushing devices are located along the contour of the frame body directly below the frame body, and each applies a force to the lower surface of the frame body away from the processing platform.

[0005] Furthermore, the frame body includes a headrest mounting tube and a backrest frame. The backrest frame includes a left arm beam, a right arm beam, and a bottom arm beam. The bottom arm beam is integrally connected to one end of the left arm beam and the right arm beam, and the ends of the left arm beam and the right arm beam away from the bottom arm beam form an enclosing notch. The headrest mounting tube is located at the enclosing notch, and both ends of the headrest mounting tube are fixedly connected to the ends of the left arm beam and the right arm beam away from the bottom arm beam, respectively. The connection between the bottom arm beam and the left arm beam and the right arm beam is inclined, thus forming an inclined connection. The connection between the left arm beam and the headrest mounting tube is bent multiple times, thus forming an irregularly shaped seat belt installation area.

[0006] Furthermore, the headrest mounting tube has several headrest tube mounting slots, and the first positioning device positions the several headrest tubes into the several headrest tube mounting slots respectively; a buffer block support sheet metal is provided on the side of the headrest mounting tube away from the bottom arm beam, and the second positioning device positions the buffer block support sheet metal at its relative position on the headrest mounting tube; a seat belt unlocking box mounting bracket is provided on the beam body in the seat belt installation area of ​​the left arm beam; a third positioning device positions the seat belt unlocking box mounting bracket at its relative position on the left arm beam; the right arm beam has a... The backrest has an inner support wire, and the fourth positioning device positions the inner support wire on its relative position on the right arm beam; the bottom arm beam has a lower backrest support wire on the side away from the headrest mounting tube, and the fifth positioning device positions the lower backrest support wire on its relative position on the bottom arm beam; the inclined connection formed by the connection between the bottom arm beam and the left and right arm beams is provided with a first mating plate and a second mating plate, and the sixth and seventh positioning devices respectively position the first mating plate and the second mating plate at their respective inclined connection points.

[0007] Furthermore, the first positioning device includes a guide seat, a first limiting mounting seat, a first cylinder, a synchronizing block, and a mating block. A plurality of first limiting mounting seats are equidistantly mounted on the processing platform. The headrest mounting tubes are simultaneously clamped onto each of the first limiting mounting seats. The guide seat is fixedly mounted on the side of the first limiting mounting seat away from the center of the processing platform, and the upper surface of the guide seat is inclined. The first cylinder is mounted on the upper surface of the guide seat. The synchronizing block is fixedly mounted on the end of the telescopic rod of the first cylinder. A plurality of mating blocks are positioned on the side of the synchronizing block away from the first cylinder, corresponding to a plurality of headrest tube mounting slots opened on the headrest mounting tube. A plurality of pushing devices are positioned directly below the headrest mounting tube. A plurality of pressing devices are positioned on the side of the first limiting mounting seat away from the guide seat, corresponding to the headrest mounting tube. Each mating block is provided with a nested mating post, and a plurality of headrest tubes are respectively sleeved and fixed on the outside of the nested mating post.

[0008] Furthermore, the second positioning device includes a second limiting mounting seat, a second cylinder, a second hinge seat, a second swing arm, and an adsorption arm. The second limiting mounting seat is disposed on the processing platform corresponding to the buffer block support sheet metal. The second cylinder is disposed at one end of the headrest mounting tube corresponding to the second limiting mounting seat, and the extension and retraction direction of the second cylinder telescopic rod is perpendicular to the processing platform. The second hinge seat is disposed on the side of the second cylinder near the headrest mounting tube. The second swing arm is hinged to the second hinge seat, and the end of the second swing arm away from the headrest mounting tube is hinged to the end of the second cylinder telescopic rod. The adsorption arm is mounted on the end of the second swing arm away from the second cylinder, and the end of the adsorption arm away from the second swing arm near the headrest mounting tube protrudes to form an adsorption part. In the initial state, the buffer block support sheet metal is adsorbed on the adsorption part of the adsorption arm.

[0009] Furthermore, the third positioning device includes a third limiting mounting seat, a third cylinder, a mounting frame, a connecting frame, a fixing block, a hinge block, a rotating block, a clamping arm, and a first side-pushing device. A plurality of the third limiting mounting seats are equidistantly mounted on the machining platform, and the extension direction of the plurality of third limiting mounting seats is perpendicular to the extension direction of each first limiting mounting seat. The left arm beam is simultaneously clamped onto each third limiting mounting seat. The first side-pushing device is located on the side of each third limiting mounting seat away from the center of the machining platform, and the movable end of the first side-pushing device can extend perpendicularly to the left... The direction of the arm beam is close to or away from the left arm beam; the mounting bracket is fixedly connected to the upper surface of the movable end of the first side push device; the third cylinder is fixedly connected to the end of the mounting bracket away from the first side push device through the connecting bracket; the connection between the connecting bracket and the mounting bracket extends away from the third cylinder in the direction close to the third limit mounting seat to form a fixing block; the fixing block is hinged to one side of one end of the rotating block through the hinge block; the other side of the rotating block hinged to the hinge block is hinged to the end of the telescopic rod of the third cylinder; the clamping arm is connected to the side of the rotating block away from the connecting bracket.

[0010] Furthermore, the first side-push device includes a side-push cylinder, a sliding seat, a sliding plate, and top blocks. The sliding seat is mounted on the machining platform, and the sliding seat is located on the side of each third limiting mounting seat away from the center of the machining platform. The side-push cylinder is mounted on the machining platform on the side of the sliding seat away from the third limiting mounting seat. The sliding plate is slidably disposed on the sliding seat, and the end of the sliding plate away from the third limiting mounting seat is fixedly connected to the end of the telescopic rod of the side-push cylinder. Several top blocks are fixedly disposed on the upper surface of the sliding plate near the end of the third limiting mounting seat. In the assembled state, the top of each of the top blocks protrudes from the upper surface of the left arm beam, and the mounting bracket is fixedly installed on the upper surface of the sliding plate away from the third limiting mounting seat. When the telescopic rod of the side push cylinder extends, each of the top blocks simultaneously abuts against the side surface of the left arm beam away from the center of the processing platform. The telescopic rod of the third cylinder extends, causing the clamping arm to rotate and contact the seat belt unlocking box mounting bracket placed on the left arm beam, until the seat belt unlocking box mounting bracket abuts against the part of each top block protruding from the upper surface of the left arm beam under the action of the clamping arm.

[0011] Furthermore, the seventh positioning device includes a seventh limiting mounting seat, a seventh cylinder, a seventh hinge seat, a seventh swing arm, a second pressure mold, a second lower support device, and a second side pushing device. The seventh limiting mounting seat is located at the end of the inclined connection away from the bottom arm beam. The second mating plate is located on the side of the inclined connection away from the center of the processing platform. The second lower support device is located directly below the second mating plate. The seventh cylinder is located corresponding to the second mating plate, and the extension direction of the seventh cylinder telescopic rod is perpendicular to the processing platform. The seventh hinge seat is located on the side of the seventh cylinder close to the second mating plate. The seventh swing arm is hinged to the seventh hinge seat, and the end of the seventh swing arm away from the second mating plate is hinged to the end of the seventh cylinder telescopic rod. The second pressure mold is installed at the end of the seventh swing arm away from the seventh cylinder, and the shape of the second pressure mold is adapted to the shape of the second mating plate. The second side pushing device is located on the side of the second mating plate away from the bottom arm beam.

[0012] Furthermore, the second side-pushing device includes a vertical mounting plate, a multi-cylinder, and a side-pushing block. The vertical mounting plate is spaced apart on the side of the second mating plate away from the bottom arm beam. The multi-cylinder is mounted on the vertical mounting plate, and the extension and retraction direction of the multi-cylinder is perpendicular to the right arm beam. The side-pushing block is connected to the end of the extension rod of the multi-cylinder through a synchronizing block. When the extension rod of the seventh cylinder extends, thereby positioning the second mating plate in the second lower support device and the second pressure mold, the extension rod of the multi-cylinder extends, and the end of the side-pushing block away from the multi-cylinder abuts against the second mating plate, thereby providing the force required for mutual pressing between the second mating plate and the inclined connection formed by the bottom arm beam and the right arm beam.

[0013] Beneficial Effects: Compared with existing technologies, the integrated welding device for automotive backrest frame bodies of this invention replaces the traditional four-beam splicing welding method with an integrated molded backrest frame structure, reducing the number of welds and splicing steps, achieving uniform distribution of structural strength of the frame body, avoiding stress concentration at welds, significantly improving the overall load-bearing capacity of the backrest frame, and eliminating frame deformation problems caused by splicing welding, thus eliminating the need for subsequent correction processes. By setting various positioning devices corresponding to different areas and auxiliary components on the frame body, combined with the constraint effect of the limiting mounting seat, precise positioning of the integrated molded frame body on the processing platform is achieved, ensuring the consistency of assembly benchmarks and avoiding misalignment of auxiliary components caused by benchmark deviations in traditional spliced ​​frames. By applying opposing forces through clamping and pushing devices distributed along the contour of the frame body, omnidirectional fixation of the integrated molded frame body is achieved, ensuring frame stability during assembly. Through the synergistic design of the integrated molded structure and precise positioning devices, the assembly accuracy and consistency of the frame body and all auxiliary components are ensured, meeting the high standards required for mass production in the automotive manufacturing industry. Attached Figure Description

[0014] Figure 1 This is a top view of the integrated welding device for the car backrest frame body according to the present invention.

[0015] Figure 2 This is a schematic diagram of the structure of the frame body of the present invention;

[0016] Figure 3 This is a schematic diagram of the integrated welding device for the car backrest frame body according to the present invention.

[0017] Figure 4 This is a side view of the third positioning device. Detailed Implementation

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

[0019] like Figures 1-4 As shown, an integrated welding device for a car backrest frame body includes a processing platform 1, a first positioning device 2, a second positioning device 3, a third positioning device 4, a fourth positioning device 5, a fifth positioning device 6, a sixth positioning device 7, a seventh positioning device 8, a pressing device 9, a pushing device 10, and a frame body 100. Each positioning device is provided with a limiting mounting seat corresponding to the frame body 100. The frame body 100 is detachably mounted on the processing platform 1 through each limiting mounting seat. Different components are provided on different areas of the frame body 100, and each positioning device corresponds to... Different components are arranged on the frame body 100, and each component is positioned at its corresponding position on the frame body 100; several clamping devices 9 are distributed along the contour of the frame body 100 on the inner or outer side of the frame body 100, and each applies a force to the upper surface of the frame body 100 pointing towards the processing platform 1; several pushing devices 10 are located along the contour of the frame body 100 directly below the frame body 100, and each applies a force to the lower surface of the frame body 100 away from the processing platform 1. In this scheme, the pushing device 10 is a pushing cylinder located directly below the frame body 100.

[0020] The frame body 100 includes a headrest mounting tube 101 and a backrest frame. The backrest frame includes a left arm beam 102, a right arm beam 103, and a bottom arm beam 104. The bottom arm beam 104 is integrally connected to one end of the left arm beam 102 and the right arm beam 103, and the ends of the left arm beam 102 and the right arm beam 103 away from the bottom arm beam 104 form an enclosing notch, thus forming a semi-enclosed "U"-shaped frame. The headrest mounting tube 101 is located at the enclosing notch, and both ends of the headrest mounting tube 101 are fixedly connected to the ends of the left arm beam 102 and the right arm beam 103 away from the bottom arm beam 104, thus forming a closed frame plate 100. The connection between the bottom arm beam 104 and the left arm beam 102 and the right arm beam 103 is inclined, thus forming an inclined connection. At the joint, the inclined connection between the bottom arm beam 104 and the left arm beam 102 is designated as the first inclined connection, and the inclined connection between the bottom arm beam 104 and the right arm beam 103 is designated as the second inclined connection. The connection between the left arm beam 102 and the headrest mounting tube 101 is bent multiple times to form an irregularly shaped seat belt mounting area 105. Furthermore, in this scheme, the push-up device 10 is respectively located directly below the left arm beam 102, the right arm beam 103, and the headrest mounting tube 101. The push-up device 10 corresponding to the left arm beam 102 and the right arm beam 103 is located at the end of the left arm beam 102 and the right arm beam 103 near the bottom arm beam 104, and the push-up device 10 corresponding to the headrest mounting tube 101 is located directly below the center of the headrest mounting tube 101.

[0021] More specifically, since the structures and working principles of the various clamping devices 9 are basically the same, only the dimensions of some components need to be adjusted according to their target objects. Each clamping device 9 includes a clamping cylinder 49, a clamping hinge seat 50, a clamping swing arm 51, and a buffer clamping block 52. Several clamping cylinders 49 are respectively arranged at intervals corresponding to the headrest mounting tube 101, the left arm beam 102, the right arm beam 103, and the bottom arm beam 104. The main difference between the clamping devices 9 lies in the shape and length of the clamping swing arm 51. Therefore, as... Figure 3 As shown, taking the clamping device 9 that cooperates with the right arm beam 103 as an example, the structure of each clamping device 9 will be described in detail. Those skilled in the art can use this description and... Figure 3The contents shown suggest the specific structure of the other clamping devices 9; the clamping cylinders 49 are spaced apart on the side of the right arm beam 103 away from the center of the processing platform 1, and the extension and retraction direction of the extension rod of the clamping cylinders 49 is perpendicular to the processing platform 1; the clamping hinge seat 50 is located on the side of the clamping cylinders 49 near the right arm beam 103, and the clamping swing arm 51 is hinged to the clamping hinge seat 50, with the end of the clamping swing arm 51 away from the right arm beam 103. The end of the telescopic rod of the pressing cylinder 49 is hinged, and the other end extends directly above the right arm beam 103. The buffer pressing block 52 is located on the lower side of the pressing swing arm 51 away from the pressing cylinder 49, that is, on the side close to the right arm beam 103. The buffer pressing block 52 is a block with a buffering function, such as a rubber block. When the telescopic rod of the pressing cylinder 49 extends, the pressing swing arm 51 swings until the pressing swing arm 51, along with the buffer pressing block 52, presses against the right arm beam 103.

[0022] The headrest mounting tube 101 has several headrest tube mounting slots, and the first positioning device 2 positions several headrest tubes 106 into the several headrest tube mounting slots respectively; a buffer block support sheet metal 107 is provided on the side of the headrest mounting tube 101 away from the bottom arm beam 104, and the second positioning device 3 positions the buffer block support sheet metal 107 at its relative position on the headrest mounting tube 101; a seat belt unlock box mounting bracket 108 is provided on the beam of the left arm beam 102 in the seat belt installation area 105; a third positioning device 4 positions the seat belt unlock box mounting bracket 108 at its relative position on the left arm beam 102; an inner backrest support wire 110 is provided on the side of the right arm beam 103 away from the left arm beam 102. The fourth positioning device 5 positions the inner backrest support wire 110 at its relative position on the right arm beam 103; the bottom arm beam 104 is provided with a lower backrest support wire 111 on the side away from the headrest mounting tube 101, and the fifth positioning device 6 positions the lower backrest support wire 111 at its relative position on the bottom arm beam 104; the first inclined connection and the second inclined connection formed at the connection between the bottom arm beam 104 and the left arm beam 102 and the right arm beam 103 are respectively provided with a first mating plate 112 and a second mating plate 113, and the sixth positioning device 7 and the seventh positioning device 8 respectively position the first mating plate 112 and the second mating plate 113 on the first inclined connection and the second inclined connection.

[0023] The first positioning device 2 includes a guide seat 11, a first limiting mounting seat 12, a first cylinder 13, a synchronizing block 14, and mating blocks 15. A plurality of first limiting mounting seats 12 are equidistantly mounted on the processing platform 1. The headrest mounting tube 101 is simultaneously clamped onto each of the first limiting mounting seats 12. The guide seat 11 is fixedly mounted on the side of the first limiting mounting seat 12 away from the center of the processing platform 1, and the upper surface of the guide seat 11 is inclined, with the lower end of the upper surface of the guide seat 11 being the end closest to the first limiting mounting seat 12. The first cylinder 13 is mounted on the upper surface of the guide seat 11, and the extension / retraction direction of the first cylinder 13 is parallel to the upper surface of the guide seat 11. The synchronizing block 14 is fixedly mounted on the end of the extension rod of the first cylinder 13. A plurality of mating blocks 15 are disposed on the side of the synchronizing block 14 away from the first cylinder 13, corresponding to a plurality of headrest tube mounting slots opened on the headrest mounting tube 101. A plurality of pushing devices 10 are disposed on the front of the headrest mounting tube 101. Below, several clamping devices 9 are positioned on the side of the first limiting mounting seat 12 away from the guide seat 11, corresponding to the headrest mounting tube 101. Each mating block 15 is provided with a nested mating post 16, and several headrest tubes 106 are respectively sleeved and fixed on the outside of the nested mating post 16. When the headrest mounting tube 101 is clamped onto the first limiting mounting seat 12, each clamping device 9 simultaneously presses against the upper surface of the headrest mounting tube 101, and each pushing device 10 simultaneously presses against the headrest. On the lower surface of the mounting tube 101, each of the first limiting mounting seats 12, each of the pressing devices 9 and each of the pushing devices 10 cooperate with each other to form an all-directional positioning of the headrest mounting tube 101. At this time, the headrest mounting tube 101 is set parallel to the processing platform 1 and is in a horizontal state. Subsequently, the telescopic rod of the first cylinder 13 extends, and each of the headrest tubes 106 is respectively clamped in the several headrest tube mounting grooves opened on the headrest mounting tube 101 under the joint action of each mating block 15 and the synchronizing block 14.

[0024] The second positioning device 3 includes a second limiting mounting seat 18, a second cylinder 19, a second hinge seat 20, a second swing arm 21, and an adsorption arm 22. The second limiting mounting seat 18 is positioned on the processing platform 1 corresponding to the buffer block support sheet metal 107. From a top view, the second limiting mounting seat 18 is located on the side of the headrest mounting tube 101 near the guide seat 11. The second cylinder 19 is positioned at one end of the headrest mounting tube 101, corresponding to the second limiting mounting seat 18, and the extension direction of the extension rod of the second cylinder 19 is perpendicular to the processing platform 1. The second hinge seat 20 is positioned on the side of the second cylinder 19 near the headrest mounting tube 101. The second swing arm 21 is hinged to the second hinge seat 20, and the end of the second swing arm 21 away from the headrest mounting tube 101 is hinged to the end of the extension rod of the second cylinder 19. The adsorption arm 22 is mounted on the end of the second swing arm 21 away from the second cylinder 19, and the end of the adsorption arm 22 away from the second swing arm 21 is close to the headrest mounting tube 101. One side of the headrest mounting tube 101 protrudes to form an adsorption part 23. In the initial state, the buffer block supporting sheet metal 107 is adsorbed onto the adsorption part 23 of the adsorption arm 22. The telescopic rod of the second cylinder 19 is in a retracted state. The second swing arm 21 is spatially perpendicular to the headrest mounting tube 101. When the headrest mounting tube 101 is clamped onto the first limiting mounting seat 12, and with the cooperation of each of the first limiting mounting seats 12, each of the pressing devices 9, and each of the pushing devices 10, an omnidirectional [adsorption / pressure] is formed. After positioning, the telescopic rod of the second cylinder 19 extends, and the second swing arm 21 rotates under the combined action of the second cylinder 19 and the second hinge seat 20 until the end of the adsorption arm 22 away from the second swing arm 21 presses against the second limiting mounting seat 18. At this time, the second swing arm 21, the adsorption arm 22 and the headrest mounting tube 101 are all in a horizontal state and are arranged in parallel. The buffer block support sheet metal 107 is fitted to the side surface of the headrest mounting tube 101 near the second limiting mounting seat 18.

[0025] The third positioning device 4 includes a third limiting mounting base 24, a third cylinder 25, a mounting frame 26, a connecting frame 27, a fixing block 28, a hinge block 29, a rotating block 30, a clamping arm 31, and a first side-pushing device. A plurality of the third limiting mounting bases 24 are equidistantly mounted on the processing platform 1, and the extension direction of the plurality of third limiting mounting bases 24 is perpendicular to the extension direction of each first limiting mounting base 12. The left arm beam 102 is simultaneously clamped onto each third limiting mounting base 24. The first side-pushing device is located on the side of each third limiting mounting base 24 away from the center of the processing platform 1, and the movable end of the first side-pushing device can move closer to or away from the left arm beam 102 in a direction perpendicular to the left arm beam 102. The mounting frame 26 is fixedly connected to the upper surface of the movable end of the first side-pushing device. The third cylinder 25 is connected to the first side-pushing device via the connecting frame 27. The mounting bracket 26 is fixedly connected to one end away from the first side push device. The connecting bracket 27 extends from the connection point with the mounting bracket 26 away from the third cylinder 25 along the direction close to the third limiting mounting seat 24 to form a fixing block 28. The fixing block 28 is hinged to one side of one end of the rotating block 30 via a hinge block 29. The other side of the rotating block 30 hinged to the hinge block 29 is hinged to the end of the telescopic rod of the third cylinder 25. The clamping arm 31 is connected to the side of the rotating block 30 away from the connecting bracket 27. When the telescopic rod of the third cylinder 25 is extended, the rotating block 30 rotates with the clamping arm 31 under the combined action of the third cylinder 25, the fixing block 28, and the hinge block 29. The clamping arm 31 cooperates with the first side push device to clamp and position the seat belt unlocking box mounting bracket 108 placed on the left arm beam 102.

[0026] The first side-push device includes a side-push cylinder 32, a sliding seat 33, a sliding plate 34, and top blocks 35. The sliding seat 33 is mounted on the processing platform 1, and the sliding seat 33 is located on the side of each third limiting mounting seat 24 away from the center of the processing platform 1. The side-push cylinder 32 is mounted on the processing platform on the side of the sliding seat 33 away from the third limiting mounting seat 24. The sliding plate 34 is slidably disposed on the sliding seat 33, and one end of the sliding plate 34 away from the third limiting mounting seat 24 is fixedly connected to the end of the telescopic rod of the side-push cylinder 32. Several top blocks 35 are fixedly disposed on the upper surface of the sliding plate 34 near the third limiting mounting seat 24, and in the assembled state, the top of each top block 35 protrudes from the upper surface of the left arm beam 102. The mounting bracket 26 is fixedly mounted on the sliding seat 33. On the upper surface of plate 34 away from the third limiting mounting seat 24; when the telescopic rod of the side push cylinder 32 extends, each of the top blocks 35 simultaneously abuts against the side surface of the left arm beam 102 away from the center of the processing platform 1. When the end of the beam in the seat belt mounting area 105 of the left arm beam 102 abuts against the headrest mounting tube 101 under the action of each top block 35, the telescopic rod of the third cylinder 25 extends, thereby causing the clamping arm 31 to rotate and connect with the seat belt unlocking box mounting bracket 108 placed on the left arm beam 102, until the seat belt unlocking box mounting bracket 108 abuts against the part of each top block 35 protruding from the upper surface of the left arm beam 102 under the drive of the clamping arm 31, thereby causing the clamping arm 31 and each top block 35 to jointly clamp and position the seat belt unlocking box mounting bracket 108.

[0027] More specifically, the first side-pushing device is positioned corresponding to the seatbelt mounting area 105, and the third limiting mounting seat 24 is positioned on the side of the first side-pushing device away from the seatbelt mounting area 105. That is, along the length of the left arm beam 102, the distance between the first side-pushing device and the headrest mounting tube 101 is greater than the distance between the first side-pushing device and the seatbelt mounting area 105 and the headrest mounting tube 101. Therefore, the function of the first side-pushing device is to use the third limiting mounting seat 24 as a fulcrum to push the beam of the left arm beam 102 located in the seatbelt mounting area 105 closer to the headrest mounting tube 10. It should be emphasized here that the function of the first side-pushing device is to provide support for the installation of the seatbelt unlocking box. The mutual resistance between the frame 108 and the left arm beam 102, and the mutual resistance between the left arm beam 102 and the headrest mounting tube 101, is not intended to cause the left arm beam 102 to bend or deform. As those skilled in the art should know, before welding, there is a certain gap between the left arm beam 102 and the headrest mounting tube 101 when they are not subjected to any external force. Even when the left arm beam 102 and the headrest mounting tube 101 are positioned by a positioning device, there is still a certain small gap between them. These gaps need to be basically eliminated by providing a force that causes them to resist each other. The main function of the first side-pushing device is to provide the above-mentioned force.

[0028] Furthermore, combined Figure 2 and Figure 3 As shown, the top block 35 consists of two blocks of different heights, which can be simply understood as a single block with a double-step cross-section. The two vertical stepped surfaces press against different pressing surfaces. The upper stepped surface pushes against the side wall of the seatbelt unlocking box mounting bracket 108, thereby positioning the seatbelt unlocking box mounting bracket 108 against the side of the left arm beam 102 furthest from the center of the processing platform 1. The lower stepped surface directly pushes the left arm beam 102. Furthermore, the sliding plate 34 protrudes outwards on both sides of the end furthest from the third limiting mounting seat 24 to form a limiting structure. The sides of the two sliding seats 33 furthest from each other are provided with a limiting structure. The sliding limit block 36 has a stroke compensation block detachably installed on the side of the limiting structure and the sliding limit block 36 that are close to each other. The length of each stroke compensation block can be adjusted according to process requirements. When the side push cylinder 32 drives the sliding plate 34 to move towards the third limiting mounting seat 24, when the stroke compensation block on the limiting structure abuts against the stroke compensation block on the sliding limit block 36, the beam of the left arm beam 102 located in the seat belt installation area 105 abuts against the headrest mounting tube 10 and exerts a certain force on the headrest mounting tube 10. Neither the left arm beam 102 nor the headrest mounting tube 10 will deform under the above force.

[0029] The fourth positioning device 5 and the fifth positioning device 6 operate in the same way and on the same principle. The only difference is that their specific structures are adapted to the dimensions of the inner support wire 110 and the lower support wire 111 of the backrest, respectively. Therefore, for the sake of brevity, this article will only use the fourth positioning device 5 as an example to describe the specific structures of the fourth positioning device 5 and the fifth positioning device 6. Those skilled in the art can fully understand the specific structures of the fourth positioning device 5 based on the relevant descriptions and... Figure 3 The contents shown indicate the specific structure of the fifth positioning device 6.

[0030] The fourth positioning device 5 includes a fourth limiting mounting base 37, a fourth cylinder 38, a fourth hinge base 39, a fourth swing arm 40, and a pressure arm 41. A plurality of fourth limiting mounting bases 37 are equidistantly mounted on the processing platform 1, and the extension direction of the plurality of fourth limiting mounting bases 37 is perpendicular to the extension direction of each first limiting mounting base 12. The plurality of fourth limiting mounting bases 37 are arranged side-by-side with a plurality of third limiting mounting bases 24. The right arm beam 103 is simultaneously clamped onto each of the fourth limiting mounting bases 37. The fourth cylinder 38 is spaced apart from the fourth limiting mounting bases 37 on the side of the right arm beam 103 away from the center of the processing platform 1, and the extension direction of the telescopic rod of the fourth cylinder 38 is perpendicular to the processing platform 1. The fourth hinge seat 39 is located on the side of the fourth cylinder 38 near the right arm beam 103. The fourth swing arm 40 is hinged to the fourth hinge seat 39, and the end of the fourth swing arm 40 away from the right arm beam 103 is hinged to the end of the telescopic rod of the fourth cylinder 38. The pressure arm 41 is installed on the end of the fourth swing arm 40 away from the fourth cylinder 38. The side of each fourth limiting mounting seat 37 away from the center of the processing platform 1 forms a support platform 42. The inner support wire 110 of the backrest is placed on each support platform 42. When the telescopic rod of the fourth cylinder 38 extends, the fourth swing arm 40 swings until the pressure arm 41 presses against the inner support wire 110 of the backrest placed on each support platform 42.

[0031] More specifically, the main difference between the fourth positioning device 5 and the fifth positioning device 6 lies in the different spacing between each limiting mounting seat and the different lengths of each pressure arm. The spacing between each limiting mounting seat and the length of each pressure arm are related to the lengths of the inner backrest support wire 110 and the lower backrest support wire 111. The longer the length of the inner backrest support wire 110 or the lower backrest support wire 111, the larger the spacing between each limiting mounting seat and the longer the length of each pressure arm. In addition, the extension direction of the fifth limiting mounting seat is parallel to the extension direction of the first limiting mounting seat 12.

[0032] The sixth positioning device 7 includes a sixth limiting mounting base 43, a sixth cylinder 44, a sixth hinge base 45, a sixth swing arm 46, a first pressing mold 47, and a first lower support device 48, according to... Figure 3As shown, the length of the supporting steel wire 111 under the backrest is only slightly shorter than the length of the bottom arm beam 104. Therefore, the fifth limiting mounting seats at both ends are located at the ends of the first and second inclined connections near the bottom arm beam 104, respectively. Thus, the sixth limiting mounting seat 43 is located at the end of the first inclined connection away from the bottom arm beam 104. The first mating plate 112 is located on the side of the first inclined connection away from the center of the processing platform 1. The first lower support device 48 is located directly below the first mating plate 112 and supports the first mating plate 112. Plate 112 provides stable support. The sixth cylinder 44 is located around the first mating plate 112, and the extension / retraction direction of the telescopic rod of the sixth cylinder 44 is perpendicular to the processing platform 1. The sixth hinge seat 45 is located on the side of the sixth cylinder 44 near the first mating plate 112, corresponding to the sixth cylinder 44. The sixth swing arm 46 is hinged to the sixth hinge seat 45, and the end of the sixth swing arm 46 away from the first mating plate 112 is hinged to the end of the telescopic rod of the sixth cylinder 44. The first mold 47 is mounted on the sixth swing arm 46 away from the sixth cylinder 44. One end of the cylinder 44, and the shape of the first pressing mold 47 is adapted to the shape of the first mating plate 112; more specifically, since the first mating plate 112 is a formed sheet metal part, too much force cannot be applied when positioning it, so as to avoid changes in its shape; similarly, since the first mating plate 112 has already formed a complex shape before being welded to the frame body 100, it needs to be positioned more accurately. Therefore, in addition to limiting the first mating plate 112 in the horizontal direction by the first pressing mold 47, it is also necessary to limit the first mating plate 112 in the vertical direction by the first lower support device 48. The first lower support device 48 can be a support block adapted to the first mating plate 112, or it can be a lower first pressing mold similar to the first pressing mold 47, and it supports the first mating plate 112 by installing a cylinder. In addition, those skilled in the art can also design other structures, as long as the first lower support structure 48 can achieve stable support for the first mating plate 112. Therefore, this solution does not limit the specific structure of the first lower support structure 48.

[0033] The seventh positioning device 8 includes a seventh limiting mounting base 53, a seventh cylinder 54, a seventh hinge base 55, a seventh swing arm 56, a second pressure mold 57, a second lower support device 58, and a second side push device. The seventh limiting mounting base 53 is located at the end of the second inclined connection away from the bottom arm beam 104. The second mating plate 113 is located on the side of the second inclined connection away from the center of the processing platform 1. The second lower support device 58 is located directly below the second mating plate 113 and provides stable support for it. The seventh cylinder 54 is located around the second mating plate 113, and the extension direction of the telescopic rod of the seventh cylinder 54 is perpendicular to the processing platform 1. The seventh hinge seat 55 is located on the side of the seventh cylinder 54 near the second mating plate 113. The seventh swing arm 56 is hinged to the seventh hinge seat 55, and the end of the seventh swing arm 56 away from the second mating plate 113 is hinged to the end of the telescopic rod of the seventh cylinder 54. The second pressure mold 57 is installed on the end of the seventh swing arm 56 away from the seventh cylinder 54, and the shape of the second pressure mold 57 is adapted to the shape of the second mating plate 113. The second side push device is located on the side of the second mating plate 113 away from the bottom arm beam 104. The arrangement and principle of the second lower support device 58 are the same as those of the first lower support device 48, and will not be described again here.

[0034] The second side-push device includes a vertical mounting plate 59, a multi-cylinder 60, and a side-push block 61. The vertical mounting plate 59 is spaced apart on the side of the second mating plate 113 away from the bottom arm beam 104. The multi-cylinder 60 is mounted on the vertical mounting plate 59, and the extension and retraction direction of the multi-cylinder 60 is perpendicular to the right arm beam 103. The multi-cylinder 60 is composed of multiple cylinders arranged in parallel along the vertical direction. The side-push block 61 is set corresponding to the second mating plate 113, and the side-push block 61 is connected to the end of the extension rod of the multi-cylinder 60 through a synchronization block. When the extension rod of the seventh cylinder 54 extends, thereby forming a basic positioning of the second mating plate 113 with the second lower support device 58 and the second pressure mold 57, the extension rod of the multi-cylinder 60 extends, and the end of the side-push block 61 away from the multi-cylinder 60 abuts against the second mating plate 113, thereby providing the force required for mutual pressing between the second mating plate 113 and the second inclined connection.

[0035] And, as Figure 3As shown, the thrust generated by the second side-pushing device is not only acting as a pressure between the second mating plate 113 and the second inclined connection, but also, after the second mating plate 113 and the second inclined connection are pressed together, the thrust generated by the second side-pushing device can be transmitted to the first inclined connection through the bottom arm beam 104, and finally to the first mating plate 112, so that the first mating plate 112 and the first mold 47 fit together more closely. During this process, the second mating plate 113 will not deform under the action of the second lower support structure and the second mold.

[0036] Furthermore, the first and second side-pushing devices, arranged diagonally, work together to create a diagonal relative lateral thrust on the frame body 100. This ensures that the forces on each area of ​​the frame body 100 are balanced during processing, preventing deformation or displacement of the frame body 100 under unilateral force. This guarantees the installation accuracy of each component on the frame body 100. Since the frame body is integrally bent from the left arm beam 102, right arm beam 103, and bottom arm beam 104, although the second side-pushing device is designed for one side of the bottom arm beam 104, the second side-pushing device also provides a certain degree of support. The lateral force of the bottom arm beam 104 can be directly applied to the right arm beam 103 and transmitted from the right arm beam 103 to one end of the headrest mounting tube 101. The force of the first side-pushing device on the left arm beam 102 can be directly transmitted through the left arm beam 102 to the other end of the headrest mounting tube 101 and the bottom arm beam 104. Therefore, the forces generated by the first side-pushing device and the second side-pushing device can be canceled out on the headrest mounting tube 101 and the bottom arm beam 104, and the ends of the left arm beam 102 and the right arm beam 103 away from the bottom arm beam 104 are respectively pressed against the two ends of the headrest mounting tube 101.

[0037] The above are the preferred embodiments described in this invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this invention, and these improvements and modifications should also be considered within the scope of protection of this invention.

Claims

1. A welding device for integrally enclosing the body of a car backrest frame, characterized in that: The device comprises a processing platform (1), a first positioning device (2), a second positioning device (3), a third positioning device (4), a fourth positioning device (5), a fifth positioning device (6), a sixth positioning device (7), a seventh positioning device (8), a pressing device (9), a pushing device (10) and a frame body (100), each of the positioning devices is provided with a limiting mounting seat corresponding to the frame body (100), the frame body (100) is detachably mounted on the processing platform (1) through each limiting mounting seat, different components are arranged on different regions of the frame body (100), each of the positioning devices is arranged corresponding to the different components on the frame body (100) and positions each component at the corresponding position on the frame body (100), a plurality of the pressing devices (9) are distributed on the inner side or the outer side of the frame body (100) along the contour of the frame body (100) and each of the pressing devices (9) applies an action force to the upper surface of the frame body (100) and points to the processing platform (1), a plurality of the pushing devices (10) are arranged below the frame body (100) along the contour of the frame body (100) and each of the pushing devices (10) applies an action force to the lower surface of the frame body (100) and points away from the processing platform (1).

2. The device according to claim 1, characterized in that it comprises: The frame body (100) comprises a headrest mounting pipe (101) and a backrest frame, the backrest frame comprises a left arm beam (102), a right arm beam (103) and a bottom arm beam (104), the bottom arm beam (104) is integrally connected to one end of the left arm beam (102) and the right arm beam (103), and the left arm beam (102) and the right arm beam (103) are formed with an enclosed gap at the end away from the bottom arm beam (104), the headrest mounting pipe (101) is arranged at the enclosed gap, and the two ends of the headrest mounting pipe (101) are fixedly connected with the ends of the left arm beam (102) and the right arm beam (103) away from the bottom arm beam (104), respectively, the connection between the bottom arm beam (104) and the left arm beam (102) and the right arm beam (103) is arranged obliquely, thereby forming an oblique connection, and the connection between the left arm beam (102) and the headrest mounting pipe (101) is arranged with multiple bends, thereby forming a special-shaped safety belt mounting area (105).

3. The device according to claim 1, characterized in that it comprises: The headrest mounting pipe (101) is provided with a plurality of headrest pipe mounting grooves, the first positioning device (2) positions a plurality of headrest pipes (106) in the plurality of headrest pipe mounting grooves respectively; the left arm beam (102) is provided with a safety belt unlocking box mounting bracket (108) on the beam body in the safety belt mounting area (105); the third positioning device (4) positions the safety belt unlocking box mounting bracket (108) at the relative position on the left arm beam (102); the right arm beam (103) is provided with a backrest inner side supporting wire (110) on the side away from the left arm beam (102), and the fourth positioning device (5) positions the backrest inner side supporting wire (110) at the relative position on the right arm beam (103); the bottom arm beam (104) is provided with a backrest lower supporting wire (111) on the side away from the headrest mounting pipe (101), and the fifth positioning device (6) positions the backrest lower supporting wire (111) at the relative position on the bottom arm beam (104); the connection between the bottom arm beam (104) and the left arm beam (102) and the right arm beam (103) forms an inclined connection, and the inclined connection is respectively provided with a first matching plate (112) and a second matching plate (113), and the sixth positioning device (7) and the seventh positioning device (8) position the first matching plate (112) and the second matching plate (113) at the respective corresponding inclined connections respectively.

4. The device according to claim 3, characterized in that it comprises: The first positioning device (2) comprises a guide seat (11), a first limiting mounting seat (12), a first air cylinder (13), a synchronous block (14) and a matching block (15), a plurality of first limiting mounting seats (12) are equidistantly mounted on the machining platform (1), the headrest mounting pipe (101) is clamped on each first limiting mounting seat (12) at the same time, the guide seat (11) is fixedly installed on one side of the first limiting mounting seat (12) away from the center of the machining platform (1), and the upper surface of the guide seat (11) is inclinedly arranged, the first air cylinder (13) is installed on the upper surface of the guide seat (11), the synchronous block (14) is fixedly installed on the end of the telescopic rod of the first air cylinder (13), and a plurality of matching blocks (15) are arranged on the side of the synchronous block (14) away from the first air cylinder (13) corresponding to the plurality of headrest pipe mounting grooves arranged on the headrest mounting pipe (101); a plurality of push top devices (10) are arranged directly below the headrest mounting pipe (101), a plurality of pressing devices (9) are arranged on the side of the first limiting mounting seat (12) away from the guide seat (11) corresponding to the headrest mounting pipe (101), and a nested matching column (16) is arranged on each matching block (15), and a plurality of headrest pipes (106) are respectively and fixedly sleeved on the outside of the nested matching column (16).

5. The device according to claim 3, characterized in that: The second positioning device (3) comprises a second limiting mounting base (18), a second cylinder (19), a second hinged seat (20), a second swing arm (21) and a suction arm (22), the second limiting mounting base (18) is arranged on the machining platform (1) corresponding to the buffer block support plate (107), the second cylinder (19) is arranged at one end of the headrest mounting pipe (101) corresponding to the second limiting mounting base (18), and the extension direction of the telescopic rod of the second cylinder (19) is perpendicular to the machining platform (1), the second hinged seat (20) is arranged on the side of the second cylinder (19) close to the headrest mounting pipe (101) corresponding to the second cylinder (19), the second swing arm (21) is hinged on the second hinged seat (20), and the end of the second swing arm (21) away from the headrest mounting pipe (101) is hingedly arranged with the end of the telescopic rod of the second cylinder (19), the suction arm (22) is arranged at the end of the second swing arm (21) away from the second cylinder (19), and the end of the suction arm (22) away from the second swing arm (21) is arranged on the side close to the headrest mounting pipe (101) to form a suction part (23), in the initial state, the buffer block support plate (107) is adsorbed on the suction part (23) of the suction arm (22).

6. The device according to claim 3, characterized in that it comprises: The third positioning device (4) comprises a third limiting mounting base (24), a third cylinder (25), a mounting frame (26), a connecting frame (27), a fixed block (28), a hinged block (29), a rotating block (30), a clamping arm (31) and a first side pushing device, a plurality of third limiting mounting bases (24) are equidistantly arranged on the machining platform (1), and the extension directions of the third limiting mounting bases (24) are perpendicular to the extension directions of the first limiting mounting bases (12), the left arm beam (102) is clamped on each third limiting mounting base (24) at the same time, the first side pushing device is arranged on the side of each third limiting mounting base (24) away from the center of the machining platform (1), and the movable end of the first side pushing device can approach or move away from the left arm beam (102) in the direction perpendicular to the left arm beam (102); the mounting frame (26) is fixedly connected to the upper surface of the movable end of the first side pushing device, the third cylinder (25) is fixedly connected to the end of the mounting frame (26) away from the first side pushing device through the connecting frame (27), the connecting frame (27) extends away from the third cylinder (25) at the connecting position with the mounting frame (26) to form the fixed block (28) in the direction close to the third limiting mounting base (24), the fixed block (28) is hingedly arranged with one side of one end of the rotating block (30) through the hinged block (29), the other side of the end of the rotating block (30) hingedly arranged with the hinged block (29) is hingedly arranged with the end of the telescopic rod of the third cylinder (25), and the clamping arm (31) is connected to the side of the rotating block (30) away from the connecting frame (27).

7. The device according to claim 6, characterized in that it comprises: The first side pushing device comprises a side pushing cylinder (32), a sliding seat (33), a sliding plate (34) and a top block (35), the sliding seat (33) is installed on the machining platform (1), and the sliding seat (33) is located at one side of each third limiting mounting seat (24) away from the center of the machining platform (1), the side pushing cylinder (32) is installed on the machining platform (1) at the side of the sliding seat (33) away from the third limiting mounting seat (24), the sliding plate (34) is slidably arranged on the sliding seat (33), and one end of the sliding plate (34) away from the third limiting mounting seat (24) is fixedly connected with the end of the telescopic rod of the side pushing cylinder (32), a plurality of top blocks (35) are fixedly arranged on the upper surface of the sliding plate (34) at the end close to the third limiting mounting seat (24), and in the assembled state, the top ends of the top blocks (35) protrude from the upper surface of the left arm beam (102), and the mounting frame (26) is fixedly installed on the upper surface of the sliding plate (34) at the end away from the third limiting mounting seat (24); when the telescopic rod of the side pushing cylinder (32) is elongated, the top blocks (35) abut against the side surface of the left arm beam (102) away from the center of the machining platform (1) at the same time, the telescopic rod of the third cylinder (25) is extended, the clamping arm (31) is rotated and in contact with the safety belt unlocking box mounting bracket (108) placed on the left arm beam (102), and the safety belt unlocking box mounting bracket (108) is in contact with the parts of the top blocks (35) protruding from the upper surface of the left arm beam (102) under the driving of the clamping arm (31).

8. The device according to claim 3, characterized in that it comprises: The seventh positioning device (8) comprises a seventh limiting mounting seat (53), a seventh cylinder (54), a seventh hinge seat (55), a seventh swing arm (56), a second pressing die (57), a second lower supporting device (58) and a second side pushing device, the seventh limiting mounting seat (53) is arranged at one end of the inclined connection away from the bottom arm beam (104), and the second matching plate member (113) is arranged at one side of the inclined connection away from the center of the machining platform (1); the second lower supporting device (58) is arranged directly below the second matching plate member (113), the seventh cylinder (54) is arranged corresponding to the second matching plate member (113), the telescopic direction of the telescopic rod of the seventh cylinder (54) is perpendicular to the machining platform (1), the seventh hinge seat (55) is arranged at the side of the seventh cylinder (54) close to the second matching plate member (113), the seventh swing arm (56) is hingedly connected to the seventh hinge seat (55), one end of the seventh swing arm (56) away from the second matching plate member (113) is hingedly connected with the end of the telescopic rod of the seventh cylinder (54), and the second pressing die (57) is installed at the end of the seventh swing arm (56) away from the seventh cylinder (54), and the shape of the second pressing die (57) is adapted to the shape of the second matching plate member (113); the second side pushing device is arranged at the side of the second matching plate member (113) away from the bottom arm beam (104).

9. The device according to claim 8, characterized in that it comprises: The second side pushing device comprises a vertical mounting plate (59), a multi-cylinder (60) and a side pushing block (61), the vertical mounting plate (59) is arranged at a side of the second matching plate (113) away from the bottom arm beam (104) at intervals, the multi-cylinder (60) is mounted on the vertical mounting plate (59), and the telescopic direction of the multi-cylinder (60) is perpendicular to the right arm beam (103), the side pushing block (61) is connected to the end of the telescopic rod of the multi-cylinder (60) through a synchronous block; when the telescopic rod of the seventh cylinder (54) is extended, so that the second matching plate (113) is positioned on the basis formed by the second lower support device (58) and the second pressing die (57), the telescopic rod of the multi-cylinder (60) is extended, and the end of the side pushing block (61) away from the multi-cylinder (60) abuts against the second matching plate (113), so as to provide the required force for mutual pressing between the second matching plate (113) and the inclined connection formed by the bottom arm beam (104) and the right arm beam (103).

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