An automobile seat framework automatic calibration welding device

Abstract

This invention discloses an automatic calibration and welding device for automotive seat frames, comprising an automotive seat frame and two pre-installed slide rails positioned directly beneath the frame, a pre-calibration mechanism that clamps the two pre-installed slide rails and supports the automotive seat frame, a weldment adjustment mechanism within the pre-calibration mechanism, and a hole matching mechanism within the pre-calibration mechanism. By setting the pre-calibration mechanism on the operating platform, the two selected pre-installed slide rails are fixed by the pre-calibration mechanism. Once the automotive seat frame is supported and fixed by the pre-calibration mechanism, the clamped two pre-installed slide rails maintain effective contact with the bottom of the automotive seat frame. Simultaneously, the hole matching mechanism determines the spacing of multiple selected studs on the top surface of the pre-installed slide rails, ultimately ensuring the stability of the studs at their designated positions on the pre-installed slide rails. This prevents tilting between the studs and the pre-installed slide rails due to external interference during welding.

Description

Technical Field

[0001] This invention relates to the field of automotive seat frame welding technology, specifically to an automatic calibration welding device for automotive seat frames. Background Technology

[0002] The car seat frame is a core component that carries passengers inside the vehicle. Its production process involves many key steps, including manual welding and automated robotic welding. The welding process directly affects the compressive strength and safety of the seat frame.

[0003] Currently, a specified number of screws need to be pre-welded onto the slide rails at the bottom of the seat to serve as a fixing carrier, thus facilitating the rapid installation of subsequent components such as the backrest. However, the existing screw-based slide rails at the bottom of the seat require clamps for positioning, and the screws, after being positioned, still need to be fixed to the slide rails at the bottom of the seat using clamps. This positioning method requires frequent measurement of the spacing between the screws and the slide rails. At the same time, with the interference of external forces during welding, the welding pressure on the screws on the slide rails will change to some extent, and in severe cases, it may cause the contact area between the screws and the slide rails to tilt.

[0004] In view of this, an automatic calibration and welding device for automobile seat frames was designed to solve the above problems. Summary of the Invention

[0005] The present invention aims to solve one of the technical problems existing in the prior art or related technologies.

[0006] Therefore, the technical solution adopted in this invention is as follows:

[0007] An automatic calibration welding device for an automotive seat frame includes an automotive seat frame and two pre-installed slide rails positioned directly below the automotive seat frame, a pre-calibration mechanism that clamps the two pre-installed slide rails and supports the automotive seat frame, a weldment adjustment mechanism within the pre-calibration mechanism, a hole matching mechanism within the pre-calibration mechanism, and four studs within the hole matching mechanism; the pre-calibration mechanism includes two crossbeams, two feet at the bottom of the crossbeams, four limiting vertical plates at the bottom of the crossbeams (two limiting vertical plates forming a group), a limiting rod located in the middle of the inner side of the group of limiting vertical plates, and a bearing movably installed within the group of limiting vertical plates and located outside the limiting rod. The structure includes a heavy base plate, a first spring located outside the limiting rod and bearing pressure on the load-bearing base plate, a plug installed at the bottom of the limiting rod, a magnetic suction plate movably installed inside the plug, a crossbar installed on the magnetic suction plate and penetrating into the load-bearing base plate, and a second spring located outside the magnetic suction plate; the crossbeam has a sliding groove inside; the welding part adjustment mechanism includes a mother tube located in the sliding groove and a third spring located in the mother tube; the hole matching mechanism includes a support plate located at the top of the third spring, a bracket located in the support plate, two legs connected to the bracket, two clamps located on the two legs, and a first clamp and a second clamp respectively connected to the two clamps.

[0008] In a preferred embodiment, the present invention may be further configured such that the pre-calibration mechanism further includes two suspensions mounted at the bottom of the two crossbeams, a first hydraulic component disposed within the two suspensions, and an end plate mounted on the hydraulic sub-rod within the first hydraulic component;

[0009] The hole matching mechanism also includes a first traction frame connected to the end plate, a base movably mounted on the top of the first traction frame, two second traction members movably mounted on the base, two pads mounted on the top of the second traction members, a locking bolt disposed inside the second traction member, and a locking spacer plate disposed outside the locking bolt and bearing pressure on the top of the two pads.

[0010] In a preferred embodiment, the present invention may be further configured as follows: the hole matching mechanism further includes a third traction member connected to the locking spacer plate, a gasket connected to the top of the third traction member, and the outer end of the bracket is movably installed in the gasket, a column set on the top of the bracket, and a fourth spring set outside the column.

[0011] The first clamp and the second clamp are externally mounted with two symmetrically distributed arc-shaped frames, two sealing plates respectively set at the outer ends of the first clamp and the second clamp, and fixing bolts set in the sealing plates.

[0012] In a preferred embodiment, the present invention can be further configured such that: the outer walls of the first clamp and the second clamp are both provided with T-shaped horizontal grooves, and the interior of the second clamp is provided with a rectangular slot adapted to the support plate;

[0013] The first clamp and the second clamp are provided with anti-detachment plates on the side facing the top of the stud.

[0014] In a preferred embodiment, the present invention may be further configured such that: the welding adjustment mechanism further includes a main sliding plate and a secondary sliding plate disposed outside the main pipe and bearing pressure on the top of the two crossbeams, a second hydraulic component installed inside the main sliding plate, and a truss installed at the top of the hydraulic sub-rod inside the second hydraulic component;

[0015] The truss has a U-shaped structure and two sliding grooves are provided inside the truss.

[0016] The mother tube has a sub-rod inside. The bottom end of the sub-rod is pressed against the bottom end of the third spring, while the top end of the sub-rod is pressed against the inner wall of the mother tube.

[0017] In a preferred embodiment, the present invention can be further configured such that the magnetic guard plate is in the form of an L-shape, and the protrusion on the inner side of the magnetic guard plate is used to limit and press the bottom of the pre-installed slide rail.

[0018] In a preferred embodiment, the present invention can be further configured such that: the limiting rod is provided with threads, and the plug rises along the threaded section of the limiting rod, for adjusting the longitudinal bearing pressure of the load-bearing base plate.

[0019] In a preferred embodiment, the present invention can be further configured such that the bottom end of the support plate is movably mounted in the slide groove, and the end of the third spring mounted in the support plate is used to provide anti-detachment protection for the support plate.

[0020] In a preferred embodiment, the present invention can be further configured such that: the locking spacer plate has a slot inside, and after the locking spacer plate moves laterally along the top of the two spacers, the locking bolt can quickly fix the locking spacer plate after the spacing is adjusted.

[0021] In a preferred embodiment, the present invention can be further configured such that: the inner sides of the first clamp and the second clamp are both provided with semi-circular grooves, and the inner walls of the semi-circular grooves are provided with anti-slip layers.

[0022] By adopting the above technical solution, the beneficial effects achieved by the present invention are as follows:

[0023] 1. This invention uses a pre-calibration mechanism on the operating platform to fix two selected pre-installed slide rails. Once the car seat frame is supported and fixed by the pre-calibration mechanism, the two clamped pre-installed slide rails will maintain effective contact with the bottom of the car seat frame. At the same time, the hole matching mechanism is used to determine the spacing of multiple selected studs on the top surface of the pre-installed slide rails. This ensures that the studs are stable at the determined positions on the pre-installed slide rails, thereby avoiding tilting between the studs and the pre-installed slide rails due to external interference during welding.

[0024] 2. This invention provides two symmetrically distributed magnetic guard plates on the outer wall of the crossbeam. With the four magnetic guard plates supporting the entire car seat frame, the two pre-installed slide rails held by the pre-calibration mechanism maintain a certain distance from the car seat frame. As multiple studs are positioned in the car seat frame, the studs, pressed against the pre-installed slide rails, maintain an effective welding gap. This effectively improves the compressive strength of the welded joint between the studs and the pre-installed slide rails, thus avoiding uneven height caused by the welding protrusion squeezing the studs.

[0025] 3. This invention supports the car seat frame with four magnetic guard plates and uses an independent car seat frame as a comparison reference for subsequent welding of the pre-installed slide rail. Therefore, it can effectively reduce the frequency of comparison between the stud and the pre-installed slide rail, thereby improving the welding efficiency between the stud and the pre-installed slide rail. Attached Figure Description

[0026] Figure 1 This is a schematic diagram illustrating the use of the present invention;

[0027] Figure 2 This is a three-dimensional schematic diagram of the present invention;

[0028] Figure 3 This is an exploded view of the present invention;

[0029] Figure 4 For the present invention Figure 3 An explosion diagram;

[0030] Figure 5 This is an exploded view of the hole matching mechanism of the present invention;

[0031] Figure 6 For the present invention Figure 5 An explosion diagram;

[0032] Figure 7 This is a schematic diagram of a partial explosion of the hole matching mechanism of the present invention;

[0033] Figure 8 This is an exploded view of the welding distance adjustment mechanism of the present invention;

[0034] Figure 9 This is a bottom view schematic diagram of the pre-calibration mechanism of the present invention;

[0035] Figure 10 For the present invention Figure 9 An explosion diagram.

[0036] Figure label:

[0037] 100. Car seat frame;

[0038] 200. Pre-installed slide rails;

[0039] 300. Pre-calibration mechanism; 310. Crossbeam; 3101. Foot pad; 3102. Suspension; 3103. First hydraulic component; 3104. End plate; 320. Limiting vertical plate; 3201. Limiting rod; 3202. Plug; 3203. First spring; 330. Load-bearing base plate; 340. Crossbar; 3401. Magnetic suction plate; 3402. Second spring;

[0040] 400. Welding distance adjustment mechanism; 410. Main slide plate; 420. Secondary slide plate; 430. Secondary hydraulic component; 440. Truss; 4401. Slide groove; 450. Main pipe; 4501. Third spring; 4502. Sub-rod;

[0041] 500. Hole-position matching mechanism; 510. First traction frame; 5101. Base support; 5102. Second traction component; 5103. Pad block; 5104. Locking spacer plate; 520. Locking bolt; 530. Third traction component; 5301. Washer; 5302. Bracket; 5303. Column; 5304. Fourth spring; 5305. Support leg; 5306. Clamp; 5307. First clamp; 5308. Second clamp; 540. Sealing plate; 5401. Fixing bolt; 550. Support plate; 560. Arc-shaped frame;

[0042] 600. Stud. Detailed Implementation

[0043] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features described herein can be combined with each other.

[0044] It should be understood that these descriptions are merely exemplary and are not intended to limit the scope of the invention.

[0045] The following describes, with reference to the accompanying drawings, some embodiments of an automatic calibration and welding device for an automotive seat frame provided by the present invention. Example 1:

[0046] Combination Figures 1 to 10As shown, the present invention provides an automatic calibration welding device for an automotive seat frame, comprising an automotive seat frame 100 and two pre-installed slide rails 200 disposed directly below the automotive seat frame 100, a pre-calibration mechanism 300 that clamps the two pre-installed slide rails 200 and supports the automotive seat frame 100, a weldment adjustment mechanism 400 disposed within the pre-calibration mechanism 300, a hole matching mechanism 500 disposed within the pre-calibration mechanism 300, and four studs 600 disposed within the hole matching mechanism 500. The pre-calibration mechanism 300 is used to pre-calibrate the automotive seat frame 100 and the two pre-installed slide rails 200, the weldment adjustment mechanism 400 is used to control the four studs 600 to position themselves along the top of the two pre-installed slide rails 200, and the hole matching mechanism 500 is used to clamp the four studs 600 and perform welding assistance and clamping on the two pre-installed slide rails 200.

[0047] The pre-calibration mechanism 300 includes two crossbeams 310, two feet 3101 at the bottom of the crossbeams 310, four limiting vertical plates 320 at the bottom of the crossbeams 310, with two limiting vertical plates 320 forming a group, a limiting rod 3201 at the middle of the inner side of the group of limiting vertical plates 320, a load-bearing base plate 330 movably installed inside the group of limiting vertical plates 320 and located outside the limiting rod 3201, a first spring 3203 located outside the limiting rod 3201 and bearing pressure on the load-bearing base plate 330, a plug 3202 installed at the bottom end of the limiting rod 3201, a magnetic suction plate 3401 movably installed inside the plug 3202, a crossbar 340 installed on the magnetic suction plate 3401 and penetrating into the load-bearing base plate 330, and a second spring 3402 located outside the magnetic suction plate 3401.

[0048] The crossbeam 310 has a groove inside;

[0049] The magnetic guard plate 3401 has an overall L-shaped structure, and the protrusion on the inner side of the magnetic guard plate 3401 is used to limit and press the bottom of the pre-installed slide rail 200.

[0050] The limiting rod 3201 is provided with threads, and the plug 3202 rises along the threaded section of the limiting rod 3201 to adjust the longitudinal bearing pressure of the load-bearing base plate 330;

[0051] The welding workpiece spacing adjustment mechanism 400 includes a main tube 450 disposed in a slide groove and a third spring 4501 disposed in the main tube 450;

[0052] The hole matching mechanism 500 includes a support plate 550 disposed at the top of the third spring 4501, a bracket 5302 disposed within the support plate 550, two legs 5305 connected to the bracket 5302, two clamps 5306 disposed on the two legs 5305, and a first clamp 5307 and a second clamp 5308 respectively connected to the two clamps 5306.

[0053] The first hydraulic component 3103 is pre-operated. As the hydraulic rod inside the first hydraulic component 3103 extends, the end plate 3104 installed on the hydraulic rod inside the first hydraulic component 3103 will pull the first traction frame 510 to extend. The bottom support 5101 movably installed on the top of the first traction frame 510 will drive the two second traction components 5102 to extend. The locking bolt 520 set in the second traction component 5102 will drive the locking spacer plate 5104 to move laterally and rise and fall longitudinally. Finally, the two third traction components 530 movably installed on the locking spacer plate 5104 will push the pad 5301 and the bracket 5302 to rise and fall. As the bracket 5302 rises, the two pulled legs 5305 will drive the first clamp 5307 and the second clamp 5308 to retract. Under the limiting constraint of the two arc-shaped frames 560, the first clamp 5307 and the second clamp 5308 will quickly lock the top of the stud 600.

[0054] At this time, the four suspended studs 600 can move relative to each other directly above the two pre-installed slide rails 200. The distance between the four studs 600 and the top of the two pre-installed slide rails 200 can be quickly determined. After being determined, the four studs 600 under pressure will maintain a constant compressive force with the two pre-installed slide rails 200, which facilitates the welding equipment to effectively weld along the gap between the car seat frame 100 and the four magnetic guard plates 3401, while avoiding the four studs 600 from being unstable under pressure and tilting abnormally during welding.

[0055] Furthermore, the welded joint between the stud 600 and the pre-installed slide rail 200 can be rapidly cooled within an unobstructed gap. Example 2:

[0056] Combination Figures 5 to 10 As shown, based on Embodiment 1, the pre-calibration mechanism 300 further includes two suspensions 3102 installed at the bottom of the two crossbeams 310, a first hydraulic component 3103 disposed in the two suspensions 3102, and an end plate 3104 installed on the hydraulic sub-rod in the first hydraulic component 3103.

[0057] Preferably, the two suspensions 3102 are fixedly installed at the bottom of the two crossbeams 310 by welding, and four magnetic guard plates 3401 are respectively set on the outer wall of the two pre-installed slide rails 200 to provide an effective support carrier for the bottom of the car seat frame 100. The two sets of magnetic guard plates 3401, together with the four load-bearing base plates 330, can quickly correct and calibrate the two pre-installed slide rails 200.

[0058] The hole matching mechanism 500 also includes a first traction frame 510 connected to the end plate 3104, a base support 5101 movably mounted on the top of the first traction frame 510, two second traction members 5102 movably mounted on the base support 5101, two pads 5103 mounted on the top of the second traction members 5102, a locking bolt 520 disposed inside the second traction member 5102, a locking spacer plate 5104 disposed outside the locking bolt 520 and bearing pressure on the top of the two pads 5103, a third traction member 530 connected to the locking spacer plate 5104, a gasket 5301 connected to the top of the third traction member 530, with the outer end of the bracket 5302 movably mounted inside the gasket 5301, a column 5303 disposed on the top of the bracket 5302, and a fourth spring 5304 disposed outside the column 5303.

[0059] Preferably, the top end of the fourth spring 5304 is provided with a hole adapted to the column 5303, and the top end of the fourth spring 5304 is adapted to bear pressure on the support plate 550.

[0060] Specifically, as the third traction member 530 pushes the pad 5301 up and down, the pad 5301, constrained by the support plate 550, will drive the bracket 5302 to extend stably. As the bracket 5302 drives the two legs 5305 to extend, the two clamps 5306 connected to the two legs 5305 will drive the first clamp 5307 and the second clamp 5308 to open and close longitudinally along the support plate 550, thereby facilitating the quick fixing of studs 600 with different diameters and widths.

[0061] Two symmetrically distributed arc-shaped frames 560 are movably mounted on the outside of the first clamp 5307 and the second clamp 5308, and two sealing plates 540 and fixing bolts 5401 are respectively set at the outer ends of the first clamp 5307 and the second clamp 5308.

[0062] The outer walls of the first clamp 5307 and the second clamp 5308 are both provided with T-shaped horizontal grooves, and the interior of the second clamp 5308 is provided with a rectangular slot adapted to the support plate 550.

[0063] The first clamp 5307 and the second clamp 5308 are provided with anti-detachment plates on the side facing the top of the stud 600;

[0064] The bottom end of the support plate 550 is movably installed in the slide groove 4401, and the end of the third spring 4501 installed in the support plate 550 is used to provide anti-detachment protection for the support plate 550.

[0065] The locking spacer 5104 has a slot inside, and after the locking spacer 5104 moves laterally along the top of the two spacers 5103, the locking bolt 520 can quickly fix the locking spacer 5104 after the spacing is adjusted.

[0066] The inner sides of the first clamp 5307 and the second clamp 5308 are both provided with semi-circular grooves, and the inner walls of the semi-circular grooves are provided with anti-slip layers.

[0067] Specifically, the locking spacer 5104 has a U-shaped groove at one end facing the second traction member 5102, and the inner wall of the U-shaped groove is provided with a rubber pad. When the nut in the locking bolt 520 is adjusted with a wrench, the locking bolt 520 can quickly lock the locking spacer 5104 after the lateral movement. At this time, the locking spacer 5104 after the adjustment can finely adjust the spacing of multiple studs 600. Example 3:

[0068] Combination Figures 8 to 10 As shown, in the above embodiment, the welding distance adjustment mechanism 400 also includes a main slide plate 410 and a secondary slide plate 420 disposed outside the mother pipe 450 and bearing pressure on the top of the two crossbeams 310, a second hydraulic component 430 installed inside the main slide plate 410, and a truss 440 installed at the top of the hydraulic sub-rod inside the second hydraulic component 430.

[0069] The truss 440 has a U-shaped structure and two sliding grooves 4401 are provided inside the truss 440.

[0070] The mother tube 450 has a daughter rod 4502 inside. The bottom end of the daughter rod 4502 is pressed against the bottom end of the third spring 4501, while the top end of the daughter rod 4502 is pressed against the inner wall of the mother tube 450.

[0071] Preferably, the top of the third spring 4501 is fixed inside the support plate 550 by welding, and the inside of the mother tube 450 is provided with lubricating oil. As the second hydraulic component 430 operates, its internal hydraulic sub-rod will drive the truss 440 to rise and fall, and the truss 440 will drive the four support plates 550 to rise and fall synchronously. While the four support plates 550 rise and fall synchronously, two adjacent support plates 550 will extend relative to each other along the center of the two pre-installed slide rails 200 as a reference plane, thereby ensuring the effectiveness of the spacing adjustment of the four studs 600 that are clamped and in a suspended state.

[0072] The working principle and usage process of this invention: The four pads 3101 are fixedly installed on the operating table in advance using bolts until the top surfaces of the two crossbeams 310 are level in the horizontal direction;

[0073] Then, the four magnetic suction plates 3401 are stretched outward in sequence until the gap between two adjacent magnetic suction plates 3401 and the side wall of one of the crossbeams 310 is expanded to the maximum. Then, a pre-installed slide rail 200 is placed in the gap. Then, the two magnetic suction plates 3401 are released. Under the lateral pressure of the second spring 3402, the two magnetic suction plates 3401 will quickly clamp the pre-installed slide rail 200 onto the outer wall of the crossbeam 310. At this time, the load-bearing base plate 330, which is provided with vertical support by the plug 3202, will provide effective support for the placed pre-installed slide rail 200.

[0074] Following the steps above, another pre-installed slide rail 200 is pre-installed in the gap of the outer wall of another crossbeam 310. Then, the entire car seat frame 100 is placed on top of the four magnetic guard plates 3401. The car seat frame 100 is effectively attracted by the magnetic attraction of the four magnetic guard plates 3401.

[0075] Then, the two locking bolts 520 are adjusted with a wrench. After the two locking bolts 520 are loosened, the distance between the four adjacent sets of third traction members 530 is controlled by moving the locking spacer plate 5104. As the first traction frame 510 is pressed and the base support 5101 is stretched, the two second traction members 5102 will control the two locking spacer plates 5104 to stretch relative to each other. As the two locking spacer plates 5104 move up and down as a whole, the pad 5301 and the bracket 5302 will rise along the vertical groove inside the support plate 550. Finally, the bracket 5302 will stretch the two legs 5305 to retract. The first clamp 5307 and the second clamp 5308, after being pressed, will fix the top of the stud 600 under the limiting action of the two arc-shaped frames 560.

[0076] When it is necessary to align the four studs 600 with the bottom holes of the car seat frame 100, the second hydraulic component 430 is activated. As the hydraulic rod inside the second hydraulic component 430 pushes the truss 440 upward, the four support plates 550 supported by the truss 440 will be raised until the four studs 600 and the car seat frame 100 maintain a certain distance. Then, the first hydraulic component 3103 is activated again. Accompanied by the end plate 3104 pulling the first traction frame 510, the locking pad 5104 in the lateral movement state will drive the support plates 550 and the main tube 450 to move laterally. Finally, the four studs 600 can be aligned with the bottom holes of the car seat frame 100. After alignment, the four studs 600 can be stably pressed onto the car seat frame 100, and the contact parts between the studs 600 and the car seat frame 100 are exposed in the gaps that are easy to weld.

[0077] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. An automatic calibration and welding device for an automobile seat frame, comprising an automobile seat frame (100) and two pre-installed slide rails (200) disposed directly below the automobile seat frame (100), characterized in that, It also includes a pre-calibration mechanism (300) that clamps two pre-installed slide rails (200) and carries the car seat frame (100), a weldment adjustment mechanism (400) disposed in the pre-calibration mechanism (300), a hole matching mechanism (500) disposed in the pre-calibration mechanism (300), and four studs (600) disposed in the hole matching mechanism (500). The pre-calibration mechanism (300) includes two crossbeams (310), two feet (3101) at the bottom of the crossbeams (310), four limiting vertical plates (320) at the bottom of the crossbeams (310), with two limiting vertical plates (320) forming a set, a limiting rod (3201) located in the middle of the inner side of the set of limiting vertical plates (320), a load-bearing base plate (330) movably installed inside the set of limiting vertical plates (320) and located outside the limiting rod (3201), and a first spring (3203) located outside the limiting rod (3201) and pressed against the load-bearing base plate (330). The plug (3202) installed at the bottom of the limit rod (3201), the magnetic suction plate (3401) movably installed inside the plug (3202), the crossbar (340) installed on the magnetic suction plate (3401) and extending through the load-bearing base plate (330), the second spring (3402) set outside the magnetic suction plate (3401), the two suspensions (3102) installed at the bottom of the two crossbeams (310), the first hydraulic component (3103) set in the two suspensions (3102), and the end plate (3104) installed on the hydraulic sub-rod in the first hydraulic component (3103). The crossbeam (310) has a groove inside; The magnetic suction plate (3401) has an overall L-shaped structure, and the protrusion on the inner side of the magnetic suction plate (3401) is used to limit and press the bottom of the pre-installed slide rail (200). The welding workpiece adjustment mechanism (400) includes a main tube (450) disposed in the chute and a third spring (4501) disposed in the main tube (450). The welding distance adjustment mechanism (400) also includes a main slide plate (410) and a secondary slide plate (420) disposed outside the main pipe (450) and bearing pressure on the top of the two crossbeams (310), a second hydraulic component (430) installed inside the main slide plate (410), and a truss (440) installed at the top of the hydraulic sub-rod inside the second hydraulic component (430). The truss (440) has a U-shaped structure and two grooves (4401) are provided inside the truss (440). The mother tube (450) is provided with a sub-rod (4502) inside. The bottom end of the sub-rod (4502) is pressed against the bottom end of the third spring (4501), while the top end of the sub-rod (4502) is pressed against the inner wall of the mother tube (450). The hole-position matching mechanism (500) includes a support plate (550) disposed at the top of the third spring (4501), a bracket (5302) disposed within the support plate (550), two legs (5305) connected to the bracket (5302), two clamps (5306) disposed on the two legs (5305), and a first clamp (5307) and a second clamp (5308) respectively connected to the two clamps (5306). The hole-position matching mechanism (500) also includes a first traction frame (510) connected to the end plate (3104), a base support (5101) movably mounted on the top of the first traction frame (510), and two clamps movably mounted on the base support (5101). A second traction member (5102), two pads (5103) installed on the top of the second traction member (5102), a locking bolt (520) set inside the second traction member (5102), a locking spacer plate (5104) set outside the locking bolt (520) and bearing pressure on the top of the two pads (5103), a third traction member (530) connected to the locking spacer plate (5104), a gasket (5301) connected to the top of the third traction member (5300), and the outer end of the bracket (5302) is movably installed in the gasket (5301), a column (5303) set on the top of the bracket (5302), and a fourth spring (5304) set outside the column (5303). The first clamp (5307) and the second clamp (5308) are externally mounted with two symmetrically distributed arc-shaped frames (560), and two sealing plates (540) and fixing bolts (5401) are respectively set at the outer ends of the first clamp (5307) and the second clamp (5308).

2. The automatic calibration and welding device for an automotive seat frame according to claim 1, characterized in that, The outer walls of the first clamp (5307) and the second clamp (5308) are provided with T-shaped horizontal grooves, and the interior of the second clamp (5308) is provided with a rectangular slot adapted to the support plate (550). The first clamp (5307) and the second clamp (5308) are provided with anti-detachment plates on the side facing the top of the stud (600).

3. The automatic calibration and welding device for an automotive seat frame according to claim 1, characterized in that, The limiting rod (3201) is provided with threads, and the plug (3202) rises along the threaded section of the limiting rod (3201) to adjust the longitudinal bearing pressure of the load-bearing base plate (330).

4. The automatic calibration and welding device for an automotive seat frame according to claim 1, characterized in that, The bottom end of the support plate (550) is movably installed in the slide groove (4401), and the end of the third spring (4501) installed in the support plate (550) is used to provide anti-detachment protection for the support plate (550).

5. The automatic calibration and welding device for an automotive seat frame according to claim 1, characterized in that, The locking spacer plate (5104) has a slot inside, and after the locking spacer plate (5104) moves laterally along the top of the two pads (5103), the locking bolt (520) can quickly fix the locking spacer plate (5104) after the spacing is adjusted.

6. The automatic calibration and welding device for an automobile seat frame according to claim 1, characterized in that, The inner sides of the first clamp (5307) and the second clamp (5308) are provided with semi-circular grooves, and the inner walls of the semi-circular grooves are provided with anti-slip layers.

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