Front row skeleton welding tool structure

Abstract

This utility model relates to a front frame welding fixture structure, characterized in that it includes a base plate 5 connected to a flip table 2 via a left flip positioning block 3 and a right flip positioning block 4, and multiple positioning modules disposed on the base plate 5. The multiple positioning modules include a left fixing plate 6, a right fixing plate 23, an upper tube frame fixing mechanism 39, a central fixing mechanism 47, and a lower sheet metal fixing mechanism 54. This front frame welding fixture structure is reasonably designed and is conducive to the installation of front frames for various vehicle models.

Description

Technical Field

[0001] This utility model relates to a welding fixture, particularly a welding fixture structure for the front frame. Background Technology

[0002] Currently, the export of domestic car seats to both domestic and international markets, in order to adapt to different regulations, ride comfort, and after-sales prices, has led to diverse configurations for the same model. For example, different welding fixtures are required for welding the left and right seat backs. More importantly, the manual and electric adjustment mechanisms for the seat back frames use two different processes, but the welding method is the same: fusing the disc with the sheet metal. Depending on the type, at least four sets of welding fixtures are required. Due to the high requirements for the positioning points of the welding fixtures and the overlapping process of the sheet metal, the cost is high. Moreover, the inconsistent production of different models causes the number of items to increase exponentially. If the investment in welding fixtures is reduced, it will lead to frequent line changes and adjustments, causing great production problems.

[0003] Currently, a Chinese patent, "A Welding Fixture for an Automotive Interior Line Slide Skeleton Frame," publication number CN207873518U, has been found. It includes a flexible base and is characterized by a workpiece positioning device mounted on the flexible base. This workpiece positioning device comprises a guide wheel seat positioning mechanism, a frame positioning mechanism, a lifting sleeve positioning mechanism, a main beam positioning mechanism, and a pulley seat positioning mechanism. These mechanisms are respectively fixed to the flexible base, corresponding to the guide wheel seat, slide frame, lifting sleeve, main beam, and pulley seat positions. This patented automotive interior line slide skeleton welding fixture features a scientifically designed structure, offering advantages such as reduced personnel requirements, time and labor savings, fast welding speed, high efficiency, and guaranteed precision. It is a highly innovative automotive interior line slide skeleton welding fixture. However, this patent is not applicable to the installation of front-row frames for various car models. Summary of the Invention

[0004] In view of the above-mentioned problems, the purpose of this utility model is to propose a front frame welding fixture structure and installation process. The front frame welding fixture structure is reasonably designed and is conducive to the installation of front frames of multiple vehicle models.

[0005] This utility model is implemented using the following solution.

[0006] The front frame welding fixture structure of this utility model is characterized by: including a base plate connected to the flipping table by a left flipping positioning block and a right flipping positioning block, and multiple sets of positioning modules set on the base plate. The multiple sets of positioning modules include a left fixed plate, a right fixed plate, an upper pipe frame fixing mechanism, a scene fixing mechanism, and a lower sheet metal fixing mechanism.

[0007] The left fixing plate is used to fix the left side plate of the front frame. The left fixing plate is provided with a first positioning pin and a first positioning block for positioning and fixing the first angle adjuster on the left side plate. The first top cylinder mechanism on the left fixing plate is used to limit and fix the first airbag fixing sheet metal of the left side plate through its first sheet metal positioning block. The first top cylinder is fixed on the base plate. The free end of the telescopic rod of the first top cylinder is connected to the first connecting fixing plate slidably connected to the base plate to drive the first connecting fixing plate to move laterally. The first connecting fixing plate is provided with a first angle adjuster positioning pin for fixing the manual fixing seat. The first connecting fixing plate also has a second positioning pin and a third positioning pin for positioning and fixing the vehicle positioning hole on the first angle adjuster.

[0008] Preferably, the upper surface of the base plate is provided with a first track and a second track arranged in parallel, the first connecting and fixing plate is slidably connected to the first track and the second track, and a protective cover is provided on the first connecting and fixing plate at the position corresponding to the track to avoid the welding slag splashed during the welding process adhering to its track stroke and causing interference.

[0009] Preferably, the first push-clamp mechanism on the left fixed plate has one side of its lower end fixed to the base plate and the other side connected to the first connecting fixed plate, so as to assist in clamping the assembled parts and opening the clamp after welding.

[0010] Preferably, the left side fixing plate is provided with a first clamping mechanism and a second clamping mechanism for fixing and clamping the left side plate, a third clamping mechanism for fixing the first airbag fixing sheet metal, and a fourth clamping mechanism for fixing the first angle adjuster.

[0011] Preferably, the right-side fixing plate is used to fix the right-side side plate. The right-side fixing plate is provided with a fourth positioning pin and a third positioning block for positioning and fixing the right-side side plate. The second top cylinder mechanism on the right-side fixing plate is provided with a second sheet metal positioning block for limiting the second airbag fixing sheet metal on the right-side side plate. The second top cylinder is fixed on the base plate. The free end of the telescopic rod of the second top cylinder is connected to the second connecting fixing plate so as to move laterally under the action of the second top cylinder. The second connecting fixing plate is provided with a second angle adjuster positioning pin for fixing the manual fixing seat. The second connecting fixing plate is provided with a fifth positioning pin and a sixth positioning pin for limiting and fixing the second angle adjuster mounting positioning hole.

[0012] Preferably, the second connecting fixing plate is slidably connected to the third and fourth tracks, and a protective cover is provided on the second connecting fixing plate at the position corresponding to the track to prevent welding slag from splashing during welding from adhering to its track stroke and causing interference; one side of the lower end of the second push clamping mechanism is fixed to the base plate, and the other side is connected to the second connecting fixing plate to assist in clamping the assembled parts and opening the clamp after welding; the second connecting fixing plate is provided with a fifth clamping mechanism and a sixth clamping mechanism for fixing the right side plate, a seventh clamping mechanism for fixing the second airbag fixing sheet metal, and an eighth clamping mechanism for fixing the second angle adjuster.

[0013] Preferably, the above-mentioned upper tube rack fixing mechanism is provided with a second positioning block and a third top cylinder mechanism for fixing the upper tube rack assembly. The actuating cylinder rod of the third top cylinder mechanism is connected to a first pillow rod positioning pin and a second pillow rod positioning pin that can be inserted into the upper tube rack assembly for positioning. The upper end of the upper tube rack fixing mechanism is fixed with a ninth clamping mechanism that can clamp the upper tube rack assembly at the center. The upper tube rack fixing mechanism is provided with a tenth clamping mechanism for pressing down and clamping the overlap between the left tube component and the left side plate sheet metal of the upper tube rack assembly. The upper tube rack fixing mechanism is provided with an eleventh clamping mechanism for pressing down and clamping the overlap between the right tube component and the right side plate sheet metal of the upper tube rack assembly.

[0014] Preferably, the ninth, tenth, and eleventh clamping mechanisms each include a cylinder and a pressure block driven to rotate by the cylinder's telescopic rod. The middle part of the pressure block is rotatably connected to the support seat of the base plate, the first end of the pressure block is connected to the telescopic rod of the cylinder, and the second end of the pressure block presses down on the workpiece.

[0015] Preferably, the above-mentioned scene fixing mechanism includes a first positioning block group and a twelfth clamping mechanism for positioning and fixing the upper frame line, ventilation fan sheet metal and lower frame line of the ventilation sheet metal support group. The positioning block at the front end of the twelfth clamping mechanism is Y-shaped to fix the lower left and right ends of the ventilation fan sheet metal. The scene fixing mechanism is provided with a thirteenth clamping mechanism and a fourteenth clamping mechanism to fix the overlap between the left side of the lower frame line and the left side panel sheet metal. The scene fixing mechanism is provided with a fifteenth clamping mechanism and a sixteenth clamping mechanism to fix the overlap between the right side of the lower frame line and the right side panel sheet metal.

[0016] Preferably, the lower sheet metal fixing mechanism is provided with a second positioning block group for positioning and fixing the lower sheet metal. The second positioning block group is provided with a plurality of irregular blocks for supporting and positioning and a seventh positioning pin for cooperating and fixing with the punched part of the lower sheet metal. The stroke of the seventh positioning pin is controlled by a fourth top cylinder mechanism. The lower sheet metal fixing mechanism is provided with a seventeenth clamping mechanism for fixing the lower left part of the left side plate and the left side part of the lower sheet metal. The lower sheet metal fixing mechanism is provided with a twenty-first clamping mechanism for fixing the lower right part of the right side plate and the right side part of the lower sheet metal. The lower sheet metal fixing mechanism is also provided with a nineteenth clamping mechanism and an eighteenth clamping mechanism for pressing down the left and right ends of the lower sheet metal.

[0017] Advantages of the front frame welding fixture structure of this utility model:

[0018] 1. This application enables the welding fixture positioning point to be connected and fixed to the manual fixing seat and the handle, so as not to affect the clamping of the electric angle adjuster; through the first angle adjuster positioning pin, it only fixes the manual fixing seat, and each first angle adjuster positioning pin fixes the first angle adjuster and the second angle adjuster through the special-shaped block;

[0019] 2. By setting a seventh clamping mechanism and actuating the second sheet metal positioning block to fix the second airbag fixing sheet metal, the overall clamping will not be affected regardless of whether the airbag fixing sheet metal is present; this not only reduces material costs but also improves production efficiency.

[0020] 3. This welding fixture and installation method make it a shared welding fixture for both left and right chair backs, thereby reducing the investment in tooling and fixtures, lowering investment costs, reducing mold and line change time, and greatly improving work efficiency. Attached Figure Description

[0021] The present invention will be further described below with reference to the accompanying drawings;

[0022] Figure 1 This is the front view of the chair back assembly tooling 1 of this utility model;

[0023] Figure 2 This is a front view of each component on the base plate 5 of this utility model;

[0024] Figure 3 This is a three-dimensional view of the components on the left fixed plate 6;

[0025] Figure 4 yes Figure 3 A stereoscopic view from another perspective;

[0026] Figure 5 This is a three-dimensional view of the third clamping mechanism 21 of the first airbag fixing sheet metal 74;

[0027] Figure 6 yes Figure 5Another perspective of a partially exploded view;

[0028] Figure 7 This is a three-dimensional view of the components on the right-side fixed plate 23;

[0029] Figure 8 yes Figure 7 A partial stereoscopic view from another perspective;

[0030] Figure 9 yes Figure 7 A partial stereoscopic view from another perspective;

[0031] Figure 10 This is a three-dimensional view of the upper pipe rack fixing mechanism 39;

[0032] Figure 11 yes Figure 10 A stereoscopic view from another perspective;

[0033] Figure 12 This is a three-dimensional view of the fixed mechanism 47 in the scene;

[0034] Figure 13 This is a 3D view of the lower sheet metal fixing mechanism 54;

[0035] Figure 14 yes Figure 13 A partial stereoscopic view from another perspective;

[0036] Figure 15 It is an exploded view of a manually operated skeleton;

[0037] Figure 16 This is an exploded view of an electric frame;

[0038] Figure 17 It is a three-dimensional diagram of a front frame;

[0039] Figure 18 It is a 3D diagram of another type of front frame;

[0040] Figure 19 It is a 3D diagram of another type of front frame;

[0041] Figure 20 This is a schematic diagram of the welding position on the outside of the manual frame;

[0042] Figure 21 This is a schematic diagram of the welding position on the inside of the manual frame;

[0043] Figure 22 This is a schematic diagram of the welding position on the outside of the electric frame;

[0044] Figure 23 This is a schematic diagram of the welding position on the inner side of the electric frame;

[0045] Figure 24 This is a schematic diagram of the processing flow;

[0046] Figure 25 It is a three-dimensional diagram of the riveting device installing the seat frame;

[0047] Figure 26 It is a three-dimensional diagram of the riveting device;

[0048] Figure 27 yes Figure 26 A partial view;

[0049] Figure 28 This is a 3D view of the left-side fixing mechanism 109;

[0050] Figure 29 This is a three-dimensional view of the right-side fixing mechanism 110;

[0051] Figure 30 This is an exploded view of the washer positioning block, sensor, and washer gasket. Detailed Implementation

[0052] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0053] The lower surface of the base plate 5 of the chair back assembly fixture 1 is fixed on the flip table 2, and the left flip positioning block 3 and the right flip positioning block 4 on both sides of the flip table 2 are fixed on the flipping equipment for positioning. Multiple modules are fixed to the upper end of the base plate 5. The multiple modules consist of a left fixing plate 6, a right fixing plate 23, an upper tube frame fixing mechanism 39, a scene fixing mechanism 47, and a lower sheet metal fixing mechanism 54. The left fixing plate 6 is used to fix the left side plate 66. The left fixing plate 6 is provided with a first positioning pin 7 and a first positioning block 8 for positioning and fixing the first angle adjuster 71 on the left side plate 66. The first top cylinder mechanism 9 on the left fixing plate 6 is used to limit and fix the first airbag fixing sheet metal 74 of the left side plate 66 through its first sheet metal positioning block 10. The first top cylinder 11 is fixed on the base plate 5. The free end of the telescopic rod of the first top cylinder 11 is connected to the first connecting fixing plate 12 slidably connected to the base plate to drive the first connecting fixing plate 12 to move laterally. The first connecting fixing plate 12 is provided with a first angle adjuster positioning pin 13 for fixing the manual fixing seat 84. The first connecting fixing plate 12 is also provided with a second positioning pin 14 and a third positioning pin 15 for positioning and fixing the vehicle positioning hole on the first angle adjuster 71.

[0054] The upper surface of the base plate 5 is provided with a first track 16 and a second track 17 arranged in parallel. The first connecting and fixing plate 12 is slidably connected to the first track 16 and the second track 17, and a protective cover is provided on the first connecting and fixing plate 12 at the position corresponding to the track to avoid the welding slag splashed during the welding process from adhering to its track stroke and causing interference.

[0055] The first push-clamp mechanism 18 on the left fixed plate 6 has its lower end fixed on one side of the base plate 5 and the other side connected to the first connecting fixed plate 12 for assisting in clamping assembled parts and opening the clamp after welding. Because there is a certain tolerance deviation during the assembly process of the parts, manual assistance is required for clamping. After welding, because the stress is not completely eliminated, manual intervention is required to open the clamp.

[0056] The left fixing plate 6 is provided with a first clamping mechanism 19 and a second clamping mechanism 20 for fixing and clamping the left side plate 66, a third clamping mechanism 21 for fixing the first airbag fixing sheet metal 74, and a fourth clamping mechanism 22 for fixing the first angle adjuster 71.

[0057] The right-side fixing plate 23 is used to fix the right-side side plate 67. The right-side fixing plate 23 is provided with a fourth positioning pin 24 and a third positioning block 25 for positioning and fixing the right-side side plate 67. The second top cylinder mechanism 32 on the right-side fixing plate 23 is provided with a second sheet metal positioning block 33 for limiting the second airbag fixing sheet metal 75 on the right-side side plate 67. The second top cylinder 26 is fixed on the base plate 5. The free end of the telescopic rod of the second top cylinder 26 is connected to the second connecting fixing plate 30 so as to move laterally under the action of the second top cylinder 26. The second connecting fixing plate 30 is provided with a second angle adjuster positioning pin 27 for fixing the manual fixing seat. The second connecting fixing plate 30 is provided with a fifth positioning pin 28 and a sixth positioning pin 29 for limiting and fixing the vehicle mounting positioning hole of the second angle adjuster 72.

[0058] The second connecting plate 30 is slidably connected to the third track 290 and the fourth track 291, and a protective cover is provided on the second connecting plate 30 corresponding to the position of the track to prevent welding slag from splashing during the welding process from adhering to its track travel and causing interference.

[0059] The lower end of the second push clamping mechanism 31 is fixed on one side of the base plate 5 and connected to the second connecting and fixing plate 30 on the other side to assist in clamping the assembled parts and opening the clamp after welding (because there is a certain tolerance deviation during the assembly process of the parts, manual assistance is required for clamping, and after welding, because the stress is not completely eliminated, manual intervention is required to open the clamp).

[0060] The second connecting and fixing plate 30 is provided with a fifth clamping mechanism 34 and a sixth clamping mechanism 36 for fixing the right side plate 67, a seventh clamping mechanism 35 for fixing the second airbag fixing sheet metal 75, and an eighth clamping mechanism 38 for fixing the second angle adjuster 72.

[0061] The upper tube rack fixing mechanism 39 is provided with a second positioning block 40 and a third top cylinder mechanism 41 for fixing the upper tube rack assembly 68. The actuating cylinder rod of the third top cylinder mechanism 41 is connected to a first pillow rod positioning pin 42 and a second pillow rod positioning pin 43 that can be inserted into the upper tube rack assembly 68 for positioning. The upper end of the upper tube rack fixing mechanism 39 is fixed with a ninth clamping mechanism 44 that can clamp the upper tube rack assembly 68 at the center. The upper tube rack fixing mechanism 39 is provided with a tenth clamping mechanism 45 for pressing down and clamping the left side tube of the upper tube rack assembly 68 and the sheet metal overlap of the left side plate 66.

[0062] The upper pipe rack fixing mechanism 39 is provided with an eleventh clamping mechanism 46 for pressing down and clamping the right side pipe fitting of the upper pipe rack assembly 68 and the sheet metal overlap of the right side connecting plate 67.

[0063] The aforementioned ninth clamping mechanism 44, tenth clamping mechanism 45, and eleventh clamping mechanism 46 all include a cylinder and a pressure block driven to rotate by the cylinder's telescopic rod. The middle part of the pressure block is rotatably connected to the support seat of the base plate. The first end of the pressure block is connected to the telescopic rod of the cylinder, and the second end of the pressure block presses the workpiece. The other clamping mechanisms in this application have the same structure as described above. The top cylinder mechanism in this application all include a cylinder and a pressure block or push block installed on the free end of the cylinder's telescopic rod.

[0064] The scene fixing mechanism 47 includes a first positioning block group 48 and a twelfth clamping mechanism 49 for positioning and fixing the upper frame line 76, the ventilation fan sheet metal 77 and the lower frame line 78 of the ventilation sheet metal support group 69. The positioning block at the front end of the twelfth clamping mechanism 49 is Y-shaped to fix the lower left and right ends of the ventilation fan sheet metal 77. The scene fixing mechanism 47 is provided with a thirteenth clamping mechanism 50 and a fourteenth clamping mechanism 51 to fix the sheet metal overlap between the left side of the lower frame line 78 and the left side panel 66. The scene fixing mechanism 47 is provided with a fifteenth clamping mechanism 52 and a sixteenth clamping mechanism 53 to fix the sheet metal overlap between the right side of the lower frame line 78 and the right side panel 67.

[0065] The lower sheet metal fixing mechanism 54 is provided with a second positioning block group 56 for positioning and fixing the lower sheet metal 70. The second positioning block group 56 is provided with a plurality of irregular blocks for supporting positioning and a seventh positioning pin 57 for cooperating and fixing with the punched part of the lower sheet metal 70. The stroke of the seventh positioning pin 57 is controlled by the fourth top cylinder mechanism 58. The lower sheet metal fixing mechanism 54 is provided with a seventeenth clamping mechanism 60 for fixing the lower left part of the left side plate 66 and the left side part of the lower sheet metal 70. The lower sheet metal fixing mechanism 54 is provided with a twenty-first clamping mechanism 59 for fixing the lower right part of the right side plate 67 and the right side part of the lower sheet metal 70. The lower sheet metal fixing mechanism 54 is also provided with a nineteenth clamping mechanism 62 and an eighteenth clamping mechanism 61 for pressing down the left and right ends of the lower sheet metal 70.

[0066] In this application, the left manual frame 63 (i.e., the frame where the manual position of the front seat is located on the left) includes a left side plate 66, a first angle adjuster 71, a right side plate 67, a second angle adjuster 72, a handle connection 73, an upper tube frame assembly 68, a ventilation sheet metal support assembly 69, and a lower sheet metal 70. The manual left side plate 66 is formed by stacking and welding a mounting disc 81, a flat spring 82, a first angle adjuster 71, a fixing plate 83, a manual fixing seat 84, and a handle connection 85. After welding, a perforated linkage rod 79 is inserted, and one end of the tension spring 86 is hooked into the handle connection 85, and the other end is fastened into the opening at the lower end of the left side plate 66 to achieve the mechanism's return to its original position. The left electric frame 64 (i.e., the frame where the electric position of the front seat is located on the left) The frame consists of a left-side side plate 66 and an electric angle adjuster 87, which are electrically adjustable. The left-side side plate 66, disc 91, and first angle adjuster 71 are stacked and welded together. After welding, a plum blossom linkage rod 79 is inserted. The angle adjuster motor 80 is locked in the groove of the left-side side plate 66 by passing through the plum blossom linkage rod 79. The right-side manual frame 65 (i.e., the frame where the manual position of the front seat is located on the right) consists of a left-side side plate 88, an angle adjuster 93, a right-side side plate 67, an angle adjuster 94, an upper tube frame assembly 90, a ventilation sheet metal support group 91, and a lower sheet metal 92. This tooling combines the positioning methods of various backrest styles, so that the left and right backrests share the same features and the manual and electric adjustment mechanisms, truly realizing the sharing of multiple styles of a single tooling.

[0067] This utility model relates to a method for installing a front seat frame. First, the left side plate 66 (manual frame) is pre-fixed to the left side fixing plate 6 of the base plate. Then, a disc 81 and a flat ring 82 are installed on the left side plate 66. Next, after the first angle adjuster 71, fixing plate 83, manual fixing seat 84 and handle connection 85 are pre-fixed, the first angle adjuster 71, which contains multiple components, is installed into the first positioning pin 7 and the first positioning block 8 of the left fixing plate 6. The first angle adjuster positioning pin 13 is inserted into the manual fixing seat 84 for positioning. The second positioning pin 14 and the third positioning pin 15 are respectively fixed to the assembly holes of the first angle adjuster 71. The second angle adjuster 72 of the right side plate 67 is installed into the fourth positioning pin 24 and the third positioning block 25 of the right fixing plate 23. 27. Insert the manual fixing seat for positioning (the electric angle adjuster has no fixing seat for positioning). The fifth positioning pin 28 and the sixth positioning pin 29 are respectively fixed to the assembly hole of the second angle adjuster 72. Place the upper tube frame assembly 68 in the groove of the second positioning block 40 for fixing. Place the lower sheet metal 70 in the groove of the second positioning block group 56 for positioning. Actuate the mechanical valve to raise the first top cylinder mechanism 9 and fix the first airbag fixing sheet metal 74. The first sheet metal positioning block 10 is used to further fix the first airbag fixing sheet metal 74 to prevent it from shifting. The second top cylinder mechanism 32 on the other side rises at the same time. Since each back frame only has an airbag fixing sheet metal on one side, the second sheet metal positioning block 33 inside is empty (this sub-assembly tooling has the feature that the left and right positioning blocks can fix back frames of different configurations and models).

[0068] Simultaneously, the fourth top cylinder mechanism 58 actuates, and the seventh positioning pin 57 rises to fix the lower sheet metal 70; at the same time, the third top cylinder mechanism 41 actuates, and the first pillow rod positioning pin 42 and the second pillow rod positioning pin 43 insert the cylindrical limit block into the pillow guide tube of the upper tube frame assembly 68 for fixation; then the mechanical valve is actuated, and the first top cylinder 11 moves the first connecting fixing plate 12 laterally through the first track 16 and the second track 17, so that the left side plate 66 overlaps with the lower left tube of the upper tube frame assembly 68, and so that the first angle adjuster positioning pin 13, the second positioning pin 14 and the third positioning pin 15 are aligned with the first adjustment... Angle adjuster 71 is limited; the second top cylinder 26 moves the second connecting fixing plate 30 laterally through the third rail 290 and the fourth rail 291, so that the right side plate 67 overlaps with the lower right pipe of the upper pipe rack assembly 68, and the second angle adjuster positioning pin 27, the fifth positioning pin 28 and the sixth positioning pin 29 limit the second angle adjuster 72; after fixing, the ventilation fan sheet metal 77 is pressed into the groove of the first positioning block group 48 for fixing; the mechanical valve is actuated, the fifth clamping mechanism 34, the sixth clamping mechanism 36 and the clamping mechanism 37 clamp the left side plate 66, and the third clamping mechanism Clamping mechanism 21 clamps the first airbag fixing sheet metal 74; clamping mechanism 22 clamps the first angle adjuster 71; clamping mechanisms 34, 36, and 37 clamp the right side connecting plate 67; clamping mechanism 35 clamps the airbag; clamping mechanism 38 clamps the second angle adjuster 72; clamping mechanism 45 clamps the left side of the upper tube frame assembly 68 and the left side connecting plate 66; clamping mechanism 46 clamps the right side of the upper tube frame assembly 68 and the right side connecting plate 67; clamping mechanism 44 clamps the upper tube frame assembly 68; clamping mechanism 49... The thirteenth clamping mechanism 50, the fourteenth clamping mechanism 51, the fifteenth clamping mechanism 52 and the sixteenth clamping mechanism 53 clamp the ventilation fan sheet metal 77; the twenty-first clamping mechanism 59 and the seventeenth clamping mechanism 60 clamp the inner side of the lower sheet metal 70; the eighteenth clamping mechanism 61 and the nineteenth clamping mechanism 62 clamp the outer side of the lower sheet metal 70. After each mechanism is clamped, the first pushing clamping mechanism 18 moves inward to confirm whether the workpiece is fixed in place, and the second pushing clamping mechanism 31 moves inward to confirm whether the workpiece is fixed in place. After confirming that each mechanism is fixed, the welding robot is operated to perform welding.

[0069] The left manual frame 63 first welds the four inner connections between the disc 81 and the first angle adjuster 71 (the first angle adjuster 71 has six through holes in a circumferential array in the circumferential direction, and the disc 81 has six protrusions corresponding to these six through holes). Specifically, the welding sequence of the four welds is the opposite first weld 97 and second weld 98, the opposite third weld 99 and fourth weld 100. The first weld 97 and the third weld 99 are adjacent, and the second weld 98 and the fourth weld 100 are adjacent. Then, the two outer connections between the disc 81 and the first angle adjuster 71 are welded (these two connections can be offset from the aforementioned four on the circumference, or partially overlap). The welding sequence is the opposite fifth weld 95 and the sixth weld 96. The welding method for the second angle adjuster 72 is the same.

[0070] Weld the left electric frame 64 (the left electric frame 64 has the same structure as the left manual frame 63). First, weld the four welds on the inner side of the electric angle adjuster 87, in the order of weld 103, weld 104, weld 105, and weld 106. Then weld the two welds on the outer side, in the order of weld 101 and weld 102. The welding method for the other electric angle adjuster is the same. After the manual back frame is welded, the tension spring 86 needs to be fixed at one end to the handle connection 85 and at the lower opening of the left side plate 66. After the electric back frame is welded, place the angle adjuster motor 80 inside the left side plate 88. After inserting the cloverleaf linkage rod from the left side into the two discs, fix the angle adjuster motor 80 inside the left side plate 88.

[0071] After the front frame is welded, the washer gasket 125 needs to be riveted. This riveting operation needs to be performed on the riveting device 108.

[0072] The riveting device 108 includes a frame 107, a left fixing mechanism 109, and a right fixing mechanism 110. The left fixing mechanism 109 includes an angle adjuster positioning block 1101 for fixing the left angle adjuster of the left electric frame 64, a linkage rod positioning block 111 for positioning the plum blossom linkage rod 79, and a washer positioning block 115 for fixing the washer gasket 125 on one side. The washer positioning block 115 is installed on the telescopic end of the top cylinder mechanism 112. The left fixing mechanism 109 is also provided with a hand clamping mechanism 113 for clamping the left angle adjuster of the left electric frame 64. The left fixing mechanism 109 is also provided with a sensor 114 (which can be a contact sensor, etc.) for sensing whether the washer gasket 125 is installed in place. If the washer gasket 125 is not placed, the top cylinder mechanism 112 will not move to close the clamp. The left fixing mechanism 109 is also provided with a tilting fixing mechanism. The back support block 116 of the left electric frame 64 and the right fixing mechanism 124 is fixed. The back support block 123 on the right fixing mechanism 110 has the same function as the back support block 116. The right fixing mechanism 110 includes an angle adjuster positioning block 117 for fixing the right angle adjuster of the left electric frame 64, a linkage rod positioning block 118 for positioning the plum blossom linkage rod 79, and a washer positioning block 122 for fixing the washer gasket 125 on one side. The washer positioning block 122 is installed on the telescopic end of the top cylinder mechanism 119. The right fixing mechanism 110 is also provided with a hand clamping mechanism 120 for clamping the right angle adjuster of the left electric frame 64, and a sensor 121 (which can be a contact sensor, etc.) for sensing whether the washer gasket 125 is installed in place. If the sensor 121 senses that the washer gasket 125 is not placed, the top cylinder mechanism 112 will not close the clamp.

[0073] The operating steps are as follows: First, place the two washer gaskets 125 into the washer positioning block 115 of the left fixing mechanism 109 and the washer positioning block 122 of the right fixing mechanism 110 of the riveting device 108, respectively, and fix them. Then, place the left electric frame 64 on the angle adjuster positioning block 1101 and the angle adjuster positioning block 117, and operate the handheld mechanism 113 and the handheld mechanism 120 respectively to clamp the left / right angle adjuster of the left electric frame 64. The sensors 114 and 121 check whether the washer gaskets 125 are placed in the grooves of the washer positioning blocks 115 and 122, and operate the top cylinder mechanism 112 and the top cylinder mechanism 119 simultaneously. The process of fixing the washer gasket 124 to the left and right ends of the left electric frame 64 and the plum blossom linkage rod 79 is completed. After the two clamps of the riveting device 108 detect the presence of the washer gasket 124 under the action of the sensor, the top cylinder can be activated to clamp the washer gasket 124. The washer gasket 124 is made of ultra-thin high-quality steel with a thickness of only 0.25MM. Manual and equipment installation often results in omissions and misalignments, so it is necessary to install highly sensitive sensors on the left and right sides. The main purpose is to limit the plum blossom linkage rod 79, and the positioning distance must also be uniform. Otherwise, it will cause abnormal noise when the vehicle collides with the outer cover during dynamic driving.

[0074] Advantages of the front frame welding fixture structure of this utility model:

[0075] 1. This application enables the welding fixture positioning point to install the manual fixing seat 84 and the handle to be connected and fixed, so as not to affect the clamping of the electric angle adjuster 87; through the first angle adjuster positioning pin 13, it only fixes the manual fixing seat 84, and each first angle adjuster positioning pin 13 fixes the first angle adjuster 71 and the second angle adjuster 72 through the special-shaped block.

[0076] 2. By setting the seventh clamping mechanism 35 and the second sheet metal positioning block 33 to fix the second airbag fixing sheet metal 75, the overall clamping will not be affected regardless of whether there is an airbag fixing sheet metal; this not only reduces material costs but also improves production efficiency.

[0077] 3. This welding fixture and installation method make it a shared welding fixture for both left and right chair backs, thereby reducing the investment in tooling and fixtures, lowering investment costs, reducing mold and line change time, and greatly improving work efficiency.

[0078] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and not to limit it; although the utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications can still be made to the specific implementation of this utility model or equivalent substitutions can be made to some technical features without departing from the spirit of the technical solution of this utility model, and all such modifications and substitutions should be covered within the scope of the technical solution claimed by this utility model.

Claims

1. A welding fixture structure for a front-row frame, characterized in that: It includes a base plate (5) connected to the flip table (2) by a left flip positioning block (3) and a right flip positioning block (4) and multiple positioning modules set on the base plate (5). The multiple positioning modules include a left fixing plate (6), a right fixing plate (23), an upper tube frame fixing mechanism (39), a scene fixing mechanism (47), and a lower sheet metal fixing mechanism (54). The left fixing plate (6) is used to fix the left side plate (66) of the front frame. The left fixing plate (6) is provided with a first positioning pin (7) and a first positioning block (8) for positioning and fixing the first angle adjuster (71) on the left side plate (66). The first top cylinder mechanism (9) on the left fixing plate (6) is used to limit and fix the first airbag fixing sheet metal (74) of the left side plate (66) through its first sheet metal positioning block (10). The first top cylinder (11) is fixed on the base plate (5). The free end of the telescopic rod of the first top cylinder (11) is connected to the first connecting fixing plate (12) which is slidably connected to the base plate to drive the first connecting fixing plate (12) to move laterally. The first connecting fixing plate (12) is provided with a first angle adjuster positioning pin (13) for fixing the manual fixing seat (84). The first connecting fixing plate (12) is also provided with a second positioning pin (14) and a third positioning pin (15) for positioning and fixing the vehicle positioning hole on the first angle adjuster (71).

2. The front frame welding fixture structure according to claim 1, characterized in that: The upper surface of the base plate (5) is provided with a first track (16) and a second track (17) arranged in parallel. The first connecting fixing plate (12) is slidably connected to the first track (16) and the second track (17), and a protective cover is provided on the first connecting fixing plate (12) corresponding to the position of the track to avoid the welding slag splashed during the welding process from adhering to its track stroke and causing interference.

3. The front frame welding fixture structure according to claim 1 or 2, characterized in that: The first push-clamp mechanism (18) on the left fixed plate (6) has its lower end fixed on one side of the base plate (5) and the other side connected to the first connecting fixed plate (12) for assisting in clamping assembled parts and opening the clamp after welding.

4. The front frame welding fixture structure according to claim 3, characterized in that: The left fixing plate (6) is provided with a first clamping mechanism (19) and a second clamping mechanism (20) for fixing and clamping the left side plate (66), a third clamping mechanism (21) for fixing the first airbag fixing sheet metal (74), and a fourth clamping mechanism (22) for fixing the first angle adjuster (71).

5. The front frame welding fixture structure according to claim 1, characterized in that: The right-side fixing plate (23) is used to fix the right-side side plate (67). The right-side fixing plate (23) is provided with a fourth positioning pin (24) and a third positioning block (25) for positioning and fixing the right-side side plate (67). The second top cylinder mechanism (32) on the right-side fixing plate (23) is provided with a second sheet metal positioning block (33) for limiting the second airbag fixing sheet metal (75) on the right-side side plate (67). The second top cylinder (26) is fixed on the base plate (5). The free end of the telescopic rod of the second top cylinder (26) is connected to the second connecting fixing plate (30) to move laterally under the action of the second top cylinder (26). The second connecting fixing plate (30) is provided with a second angle adjuster positioning pin (27) for fixing the manual fixing seat. The second connecting fixing plate (30) is provided with a fifth positioning pin (28) and a sixth positioning pin (29) for limiting and fixing the vehicle mounting positioning hole of the second angle adjuster (72).

6. The front frame welding fixture structure according to claim 5, characterized in that: The second connecting fixing plate (30) is slidably connected to the third track (290) and the fourth track (291), and a protective cover is provided on the second connecting fixing plate (30) corresponding to the position of the track to avoid the welding slag splashed during the welding process adhering to its track stroke and causing interference; the lower end of the second push clamping mechanism (31) is fixed on one side of the base plate (5), and the other side is connected to the second connecting fixing plate (30) to assist in clamping the assembled parts and opening the clamp after welding; the second connecting fixing plate (30) is provided with a fifth clamping mechanism (34) and a sixth clamping mechanism (36) for fixing the right side plate (67), a seventh clamping mechanism (35) for fixing the second airbag fixing sheet metal (75) is provided on the second connecting fixing plate (30), and an eighth clamping mechanism (38) for fixing the second angle adjuster (72) is provided on the second connecting fixing plate (30).

7. The front frame welding fixture structure according to claim 1, characterized in that: The upper tube rack fixing mechanism (39) is provided with a second positioning block (40) and a third top cylinder mechanism (41) for fixing the upper tube rack assembly (68). The actuating cylinder rod of the third top cylinder mechanism (41) is connected to a first pillow rod positioning pin (42) and a second pillow rod positioning pin (43) that can be inserted into the upper tube rack assembly (68) for positioning. The upper end of the upper tube rack fixing mechanism (39) is fixed with a ninth clamping mechanism (44) that can clamp the upper tube rack assembly (68) at the center. The upper tube rack fixing mechanism (39) is provided with a tenth clamping mechanism (45) for pressing down and clamping the left side tube of the upper tube rack assembly (68) and the sheet metal overlap of the left side plate (66). The upper tube rack fixing mechanism (39) is provided with an eleventh clamping mechanism (46) for pressing down and clamping the right side tube of the upper tube rack assembly (68) and the sheet metal overlap of the right side plate (67).

8. The front frame welding fixture structure according to claim 7, characterized in that: The ninth clamping mechanism (44), the tenth clamping mechanism (45), and the eleventh clamping mechanism (46) all include a cylinder and a pressure block driven by the cylinder extension rod to swing. The middle part of the pressure block is rotatably connected to the support seat of the base plate. The first end of the pressure block is connected to the extension rod of the cylinder, and the second end of the pressure block presses the workpiece.

9. The front frame welding fixture structure according to claim 1, characterized in that: The scene fixing mechanism (47) includes a first positioning block group (48) and a twelfth clamping mechanism (49) for positioning and fixing the upper frame line (76), ventilation fan sheet metal (77) and lower frame line (78) of the ventilation sheet metal support group (69). The positioning block at the front end of the twelfth clamping mechanism (49) is Y-shaped to fix the lower left and right ends of the ventilation fan sheet metal (77). The scene fixing mechanism (47) is provided with a thirteenth clamping mechanism (50) and a fourteenth clamping mechanism (51) to fix the sheet metal overlap between the left side of the lower frame line (78) and the left side panel (66). The scene fixing mechanism (47) is provided with a fifteenth clamping mechanism (52) and a sixteenth clamping mechanism (53) to fix the sheet metal overlap between the right side of the lower frame line (78) and the right side panel (67).

10. The front frame welding fixture structure according to claim 1, characterized in that: The lower sheet metal fixing mechanism (54) is provided with a second positioning block group (56) for positioning and fixing the lower sheet metal (70). The second positioning block group (56) is provided with a plurality of irregular blocks for supporting positioning and a seventh positioning pin (57) for cooperating and fixing with the punched part of the lower sheet metal (70). The stroke of the seventh positioning pin (57) is controlled by the fourth top cylinder mechanism (58). The lower sheet metal fixing mechanism (54) is provided with a seventeenth clamping mechanism (60) for fixing the lower left part of the left side plate (66) and the left side part of the lower sheet metal (70). The lower sheet metal fixing mechanism (54) is provided with a twenty-first clamping mechanism (59) for fixing the lower right part of the right side plate (67) and the right side part of the lower sheet metal (70). The lower sheet metal fixing mechanism (54) is also provided with a nineteenth clamping mechanism (62) and an eighteenth clamping mechanism (61) for pressing down the left and right ends of the lower sheet metal (70).

Images