Automobile door sill assembly welding device with automatic feeding mechanism

Abstract

The invention discloses a welding device for an automobile threshold assembly with an automatic feeding mechanism, and relates to the technical field of automobile parts welding. The invention aims at the problem that the docking position between threshold pieces needs to be finely adjusted frequently, thereby affecting the continuity of welding processing; the invention comprises workbenches arranged at intervals and welding seats rotatably arranged on the workbenches; the invention adopts a structural docking design in which the threshold pieces are first separated and then merged, so that the threshold outer plate forms a "preliminary docking" with the threshold inner plate under the flipping action of the hinged rod 1 and the hinged rod 2 deflected in two degrees of freedom, and then the threshold outer plate is guided to slide to the threshold inner plate under the action of gravity to form a stable docking, and at the same time, the hinged rod 1 and the hinged rod 2 complete the reset and wait for the next threshold outer plate to be docked, so that the "continuous docking" is completed, that is, the uninterrupted welding processing of the automobile threshold assembly is completed by continuous feeding, docking, welding and feeding.

Description

Technical Field

[0001] The invention relates to the technical field of automobile parts welding, and in particular to an automobile door sill assembly welding device with an automatic feeding mechanism. Background Art

[0002] The welding process of the automobile threshold assembly includes the welding process between the threshold outer panel and the threshold inner panel. In the actual processing process, since the automobile threshold includes the threshold outer panel and the threshold inner panel and both are of special-shaped structures, a specific auxiliary fixing tool is required to complete the fixing and thus achieve the purpose of continuous welding processing. Referring to the automobile threshold welding auxiliary device disclosed in the prior art with the publication number CN221415471U, the device adopts pneumatic adsorption equipment to manually assemble and dock the threshold parts, and then completes the welding operation;

[0003] In combination with the above, it is necessary to explain that: during the welding process, it is difficult to achieve continuous and accurate docking of the special-shaped structure of the threshold member, resulting in the need for frequent fine-tuning of the docking position between the threshold outer panel and the threshold inner panel, hindering the continuity of the welding process and resulting in low welding efficiency; for this reason, the present application proposes a solution. Summary of the invention

[0004] The object of the present invention is to provide a welding device for an automobile door sill assembly with an automatic feeding mechanism, which is used to solve the problem that the door sill parts need to be frequently fine-tuned in the butt joint position, thereby affecting the continuity of the welding process.

[0005] The object of the present invention can be achieved through the following technical scheme: a welding device for an automobile threshold assembly with an automatic feeding mechanism, comprising a workbench arranged at intervals and a welding seat rotatably arranged on the workbench, a docking assembly for matching the threshold outer panel and the threshold inner panel of the automobile threshold assembly being slidably installed on the welding seat, the docking assembly comprising a supporting plate and a receiving plate arranged at an angle to each other; a feeding assembly for feeding the threshold outer panel is installed on one side of the welding seat, the feeding assembly comprises a feeding box symmetrically arranged and in contact with the side of the welding seat; a displacement assembly for turning the threshold outer panel is jointly installed between the feeding boxes near the ends of the welding seat, the displacement assembly comprises an articulated rod 1 and an articulated rod 2 which are hingedly arranged on the rotating seat, a fixed clamping plate and a movable clamping plate for clamping the threshold outer panel are installed on the upper end of the articulated rod 2, and the articulated rod 1 and the articulated rod 2 move the threshold outer panel to the supporting plate and the receiving plate via a rotating fulcrum.

[0006] It is further configured as follows: the docking assembly also includes a movable plate arranged on the welding seat, brackets are symmetrically installed on both sides of the middle of the movable plate, and upper rods and lower rods are arranged between the brackets in the same group at upper and lower intervals.

[0007] It is further configured as follows: the supporting plate is connected to the outer lower rod, the material receiving plate is connected to the inner upper rod, the supporting plate and the upper surface of the material receiving plate overlap, and a limiting plate is installed at the lower end of the supporting plate.

[0008] It is further configured as follows: a plurality of pulleys are installed on the inner side of the loading box, a loading synchronous belt is installed outside the plurality of pulleys, a vertical slot is opened on the outer side of the loading synchronous belt, and the two loading synchronous belts are clamped on the outer panel of the threshold through the same group of vertical slots.

[0009] It is further configured as follows: a pair of workbenches are each provided with a rotating rod at the upper end thereof, a driving structure is provided outside the rotating rod, one end of the rotating rod extending to the inside of the workbench is connected to a welding seat, a docking slide rail is provided on the welding seat, and the movable plate is slidably connected to the docking slide rail.

[0010] It is further configured as follows: a batching seat for loading the inner plate of the threshold is arranged outside the welding seat, and a batching slide rail matching the docking slide rail is installed on the batching seat.

[0011] It is further configured that: a discharge platform connected to a loading box is installed at the bottom of a pair of the workbenches, and a conveyor belt for conveying automobile door sill assemblies is obliquely installed on the discharge platform.

[0012] It is further configured as follows: the rotation fulcrum includes pins respectively arranged between the hinge rod 1 and the hinge rod 2, and between the hinge rod 1 and the rotating seat, and a driving motor for respectively driving the hinge rod 1 and the hinge rod 2 to rotate is arranged outside the rotation fulcrum.

[0013] The method for using the automobile door sill assembly welding device with an automatic feeding mechanism comprises the following steps:

[0014] Step 1: First, use the adsorption robot to adsorb the threshold outer panel and clamp it between the vertical slots of the same group, start the pulley to drive the feeding synchronous belt to move upward, so that the threshold outer panel always remains in a stable and clamped state and rises until it moves to the top of the feeding box and stops;

[0015] Step 2: The threshold inner plate is placed on the supporting plate and the receiving plate at the same time, and the moving plate moves through the batching slide rail and the docking slide rail to a state where it is aligned with the feeding synchronous belt and stops;

[0016] Step 3: At this time, the threshold outer panel is clamped by the hinge rod 1 and the hinge rod 2 through the fixed clamp plate and the movable clamp plate and moves toward the side of the threshold inner panel, and the hinge rod 1 and the hinge rod 2 are deflected in two degrees of freedom according to the thickness and the tilt angle of the threshold inner panel, so that the threshold outer panel can be placed on the threshold inner panel in a parallel state, and the threshold outer panel and the threshold inner panel form a "preliminary docking";

[0017] Step 4: Then, the movable splint is separated from the attachment to the threshold outer panel. At this time, the threshold outer panel slides down to the threshold inner panel under the action of gravity to form a stable docking. At the same time, the hinged rod 1 and the hinged rod 2 are reset and wait for the next threshold outer panel to be docked, thus completing the "continuous docking".

[0018] The present invention has the following beneficial effects:

[0019] 1. The present invention aims to solve the problem that the joint positions between the threshold parts need to be fine-tuned frequently, thus affecting the continuity of the welding process. The present invention adopts a structural joint design in which the threshold parts are separated and then joined, so that the threshold outer panel forms a "preliminary joint" with the threshold inner panel under the flipping action of the hinged rod 1 and the hinged rod 2 with two degrees of freedom deflection, and then the threshold outer panel slides down to the threshold inner panel under the action of gravity to form a stable joint. At the same time, the hinged rod 1 and the hinged rod 2 complete the reset and wait for the next threshold outer panel to be joined, thus completing the "continuous joint", that is, completing the uninterrupted welding process of the automobile threshold assembly by continuous loading, jointing, welding and feeding.

[0020] 2. Moreover, during the transfer of the threshold outer panel, the hinge rod 1 and the hinge rod 2 are first deflected clockwise, and the deflection angle of the hinge rod 2 is adjusted according to the inclination angle of the threshold inner panel on the supporting plate and the receiving plate. Then the movable clamping plate is released from the clamping of the threshold outer panel so that the threshold outer panel and the threshold inner panel are butted against each other. In this process, the multi-degree-of-freedom deflection method enables the threshold parts to form a relatively stable butt-jointed and welded state regardless of the placement angle, which can effectively avoid the phenomenon of multiple fine-tuning of the welding position. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 It is a structural schematic diagram of the present invention;

[0023] Figure 2 It is a rear view structural schematic diagram of the present invention;

[0024] Figure 3 It is a structural diagram of the feeding assembly of the present invention;

[0025] Figure 4 It is a partial structural schematic diagram of the docking assembly of the present invention;

[0026] Figure 5 It is a schematic diagram of the installation of the welding seat of the present invention;

[0027] Figure 6 It is a schematic diagram of the combination of the welding seat and the batching seat of the present invention;

[0028] Figure 7 It is a schematic diagram of the automobile door sill assembly workpiece of the present invention before docking;

[0029] Figure 8 It is a schematic diagram of the automobile door sill assembly workpiece after docking according to the present invention.

[0030] In the figure: 1. Workbench; 2. Discharging platform; 3. Loading box; 4. Welding seat; 5. Batching seat;

[0031] 6. Docking assembly; 601. Moving plate; 602. Bracket; 603. Support plate; 604. Receiving plate; 605. Guide rod; 606. Limiting plate; 607. Upper rod; 608. Lower rod;

[0032] 7. Transposition assembly; 701. Rotating seat; 702. Swinging rod; 703. Articulated rod 1; 704. Articulated rod 2; 705. Fixed splint; 706. Movable splint;

[0033] 8. Docking rail; 9. Pulley; 10. Loading synchronous belt; 11. Vertical slot; 12. Bottom rod; 13. Batching rail; 14. Rotating rod. DETAILED DESCRIPTION

[0034] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] Embodiment 1: The present invention aims to solve the problem that the joint positions between the threshold pieces need to be fine-tuned frequently, thereby affecting the continuity of the welding process. To this end, the present invention proposes the following technical solutions:

[0036] Reference Figure 1 - Figure 8As shown, in this embodiment, a welding device for an automobile threshold assembly with an automatic feeding mechanism comprises a workbench 1 arranged at intervals and a welding seat 4 rotatably arranged on the workbench 1, a docking assembly 6 for matching the threshold outer plate and the threshold inner plate of the automobile threshold assembly is slidably mounted on the welding seat 4, and the docking assembly 6 comprises a supporting plate 603 and a receiving plate 604 arranged obliquely to each other; a feeding assembly for loading the threshold outer plate is installed on one side of the welding seat 4, and the feeding assembly comprises a symmetrically arranged welding seat 4 A loading box 3 in contact with the side; a shifting assembly 7 for turning the threshold outer plate is installed between the ends of the loading box 3 near the welding seat 4, and the shifting assembly 7 includes a hinge rod 1 703 and a hinge rod 2 704 which are hingedly arranged on the rotating seat 701, and a fixed clamping plate 705 and a movable clamping plate 706 for clamping the threshold outer plate are installed on the upper end of the hinge rod 2 704, and the hinge rod 1 703 and the hinge rod 2 704 move the threshold outer plate to the supporting plate 603 and the receiving plate 604 through the rotating fulcrum;

[0037] Reference Figure 7 and Figure 8 As shown, the present solution is applied to, including but not limited to, a cross-sectional schematic diagram of a docking structure of a threshold outer plate and a threshold inner plate in a vehicle threshold assembly, wherein the docking assembly 6 also includes a movable plate 601 disposed on a welding seat 4, brackets 602 are symmetrically installed on both sides of the middle of the movable plate 601, upper rods 607 and lower rods 608 are arranged at intervals between the brackets 602 in the same group, a supporting plate 603 is connected to the outer lower rod 608, a material receiving plate 604 is connected to the inner upper rod 607, the supporting plate 603 and the upper surface of the material receiving plate 604 are overlapped, and a limiting plate 606 is installed at the lower end of the supporting plate 603;

[0038] A discharge platform 2 connected to a loading box 3 is installed at the bottom of a pair of workbenches 1. A conveyor belt for conveying the automobile threshold assembly is installed obliquely on the discharge platform 2 (not shown in the figure). The automobile threshold assembly after welding is tilted and turned by the welding seat 4, so that the conveyor belt installed in the same oblique manner can complete the conveyance of the finished product, thereby combining the above: continuous loading, docking, welding and feeding to complete the uninterrupted processing of the automobile threshold assembly;

[0039] Reference Figure 3 As shown, a plurality of pulleys 9 are installed on the inner side of the loading box 3, and a loading synchronous belt 10 is installed outside the plurality of pulleys 9. A vertical slot 11 is provided on the outer side of the loading synchronous belt 10. The two loading synchronous belts 10 clamp the threshold outer plate through the same group of vertical slots 11, and the adsorption manipulator adsorbs the threshold outer plate and clamps it between the same group of vertical slots 11. The pulley 9 is started to drive the loading synchronous belt 10 to move upward, so that the threshold outer plate always keeps a stable state and rises until it moves to the top of the loading box 3 and stops;

[0040] Reference Figure 6As shown, a docking slide rail 8 is installed on the welding seat 4. The moving plate 601 is slidably connected to the docking slide rail 8. An ingredient seat 5 for feeding the inner panel of the door sill is arranged outside the welding seat 4. An ingredient slide rail 13 matching the docking slide rail 8 is installed on the ingredient seat 5;

[0041] Referring to Figure 5 and Figure 7 As shown, guide rods 605 are symmetrically arranged on both sides of the upper surfaces of the supporting plate 603 and the material receiving plate 604. The two guide rods 605 are arranged in an inverted 'V' structure, and the distance between the bottom ends is the same as the length of the outer panel of the door sill. When the inner panel of the door sill is first placed through the supporting plate 603 and the material receiving plate 604, the moving plate 601 moves to align with the position of the outer panel of the door sill that moves up on the feeding synchronous belt 10 and then stops.

[0042] The docking position between the outer panel and the inner panel of the door sill member is mainly represented by the distances between the two ends at the bottom of the outer panel of the door sill and the distances between the two ends at the bottom of the inner panel of the door sill. Therefore, when solving the problem of 'frequently fine-tuning the docking position between the door sill members', 'locking' one of the end positions of the outer panel or the inner panel of the door sill can achieve docking. The following is a detailed description:

[0043] The adsorption manipulator adsorbs the outer panel of the door sill and clamps it between the same group of vertical card slots 11. The belt pulley 9 is started to drive the feeding synchronous belt 10 to move up, so that the outer panel of the door sill always rises in a stable state until it stops at the top of the feeding box 3; at the same time, the inner panel of the door sill is placed on the supporting plate 603 and the material receiving plate 604. When the moving plate 601 moves to the state of aligning with the feeding synchronous belt 10, it stops. The outer panel of the door sill in the vertical card slots 11 is then clamped by the first articulated rod 703 and the second articulated rod 704 through the fixed clamping plate 705 and the movable clamping plate 706 and moves towards the inner panel of the door sill. According to the thickness and inclination angle of the inner panel of the door sill, the first articulated rod 703 and the second articulated rod 704 deflect in two degrees of freedom, so that the outer panel of the door sill can be placed above the inner panel of the door sill in a parallel state, forming a preliminary docking between the outer panel of the door sill and the inner panel of the door sill; immediately afterwards, the movable clamping plate 706 disengages from the attachment to the outer panel of the door sill. At this time, the outer panel of the door sill slides down onto the inner panel of the door sill under the action of gravity to form a stable docking. At the same time, the first articulated rod 703 and the second articulated rod 704 are reset and wait for the next outer panel of the door sill to be docked; after the docking of the outer panel and the inner panel of the door sill is completed, welding processing is carried out. After the welding processing is completed, the welding seat 4 rotates counterclockwise, thereby driving the welded door sill member to slide down onto the conveyor belt below to complete the feeding;

[0044] The specific continuous docking process is as follows:

[0045] During the initial docking, the threshold outer plate moves upward from the vertical slot 11 in a stable clamped state, and then the hinged rod 1 703 and the hinged rod 2 704 with two degrees of freedom deflection complete the clamping and flipping through the fixed clamping plate 705 and the movable clamping plate 706. After flipping to the supporting plate 603, the movable clamping plate 706 is loosened, and the threshold outer plate falls down under the guidance of the guide rod 605 and forms a sliding docking with the threshold inner plate, so that the threshold is fully docked and welded;

[0046] After welding is completed: the welding seat 4 rotates counterclockwise, driving the welded threshold piece to slide onto the conveyor belt below to complete the feeding and then reset, and the moving plate 601 continues to drive the supporting plate 603 and the receiving plate 604 to move to the material distribution seat 5 through the welding seat 4 to complete the loading of the next set of threshold inner plates to be welded, and then returns to the welding seat 4 after loading, which constitutes an intermittent time period, that is, keeping the same time interval as the movement of the threshold outer plate in the vertical slot 11, so as to achieve the purpose of continuous docking;

[0047] The advantage is that the threshold parts are classified and batched and then assembled synchronously, so that the accessories in the threshold parts can be pre-jointed and intermittently fully joined to finally achieve the purpose of completing the joining and welding without fine-tuning, thereby realizing uninterrupted continuous welding processing.

[0048] Embodiment 2:

[0049] This embodiment is based on the further structural optimization of the docking process in the first embodiment:

[0050] The invention comprises: a pair of workbenches 1 are both provided with a rotating rod 14 at their upper ends, a driving structure is provided outside the rotating rod 14, and one end of the rotating rod 14 extending to the inside of the workbenches 1 is connected to a welding seat 4;

[0051] The rotating fulcrum includes a pin shaft respectively arranged between the hinge rod 1 703 and the hinge rod 2 704, and between the hinge rod 1 703 and the rotating seat 701, and a driving motor for driving the hinge rod 1 703 and the hinge rod 2 704 to rotate is arranged outside the rotating fulcrum, and the hinge rod 1 703, the hinge rod 2 704 and the movable splint 706 are all driven by the driving motor to adjust the direction. Specifically, the action during the transfer of the door sill outer plate is as follows: Figure 7 and Figure 8 As shown, the hinge rod 1 703 and the hinge rod 2 704 are first deflected clockwise, and the deflection angle of the hinge rod 2 704 is adjusted according to the inclination angle of the threshold inner plate on the supporting plate 603 and the receiving plate 604, and then the movable clamping plate 706 is released from the clamping of the threshold outer plate so that the threshold outer plate and the threshold inner plate are butted against each other. In this process, the threshold parts are stably butted against each other and then welded in a multi-degree-of-freedom deflection manner, which can effectively avoid the phenomenon of multiple fine-tuning of the welding position, and finally achieve the purpose of continuous welding processing;

[0052] It should be noted that when the threshold outer panel is clamped and flipped during the initial docking process, a comprehensive appearance defect detection of the threshold outer panel can be completed. Specifically, a camera arranged above the upper end of the loading box 3 is used to take a bird's-eye view image and compare it with the threshold appearance image of normal appearance preset by the system. If there is a difference, docking with the threshold inner panel will not be performed, and after the welding seat 4 is flipped, it will directly fall through the gap onto the conveyor belt to complete reverse transportation, that is, the collection of waste materials, and otherwise continue docking.

[0053] Embodiment 3: This embodiment is based on Embodiment 1 and Embodiment 2. The method for using the automobile door sill assembly welding device comprises the following steps:

[0054] Step 1: First, the threshold outer panel is adsorbed by an adsorption manipulator and clamped between the vertical clamping slots 11 of the same group, and the pulley 9 is started to drive the feeding synchronous belt 10 to move upward, so that the threshold outer panel always remains in a stable clamped state and rises until it moves to the top of the feeding box 3 and stops;

[0055] Step 2: The threshold inner plate is placed on the supporting plate 603 and the receiving plate 604 at the same time, and the moving plate 601 moves to a state aligned with the feeding synchronous belt 10 through the batching slide rail 13 and the docking slide rail 8, and stops;

[0056] Step 3: At this time, the threshold outer panel is clamped by the hinge rod 1 703 and the hinge rod 2 704 through the fixed clamping plate 705 and the movable clamping plate 706 and moves toward the side of the threshold inner panel. According to the thickness and the tilt angle of the threshold inner panel, the hinge rod 1 703 and the hinge rod 2 704 are deflected in two degrees of freedom, so that the threshold outer panel can be placed above the threshold inner panel in a parallel state, so as to achieve "preliminary docking" between the threshold outer panel and the threshold inner panel.

[0057] Step 4: Then, the movable splint 706 is separated from the threshold outer panel. At this time, the threshold outer panel slides down to the threshold inner panel under the action of gravity to form a stable docking. At the same time, the hinged rod 1 703 and the hinged rod 2 704 complete the reset and wait for the next threshold outer panel to be docked, thus completing the "continuous docking".

[0058] In summary, the structural docking design of the threshold parts being separated and then reunited proposed in this scheme enables the threshold outer panel to form a "preliminary docking" with the threshold inner panel under the flipping action of the hinged rod 1 703 and the hinged rod 2 704 deflected in two degrees of freedom, and then the threshold outer panel is guided to slide to the threshold inner panel under the action of gravity to form a stable docking, and at the same time, the hinged rod 1 703 and the hinged rod 2 704 complete the reset and wait for the next threshold outer panel to be docked, thus completing the "continuous docking", that is, completing the uninterrupted welding process of the automobile threshold assembly by continuous loading, docking, welding and feeding;

[0059] During the transfer of the threshold outer panel, the hinge rod 1 703 and the hinge rod 2 704 are first deflected clockwise, and the deflection angle of the hinge rod 2 704 is adjusted according to the inclination angle of the threshold inner panel on the supporting plate 603 and the receiving plate 604. Then the movable clamp 706 is released from the clamping of the threshold outer panel so that the threshold outer panel and the threshold inner panel are connected. In this process, the multi-degree-of-freedom deflection method allows the threshold parts to form a relatively stable connection and welding state regardless of the placement angle, which can effectively avoid the phenomenon of multiple fine-tuning of the welding position.

[0060] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

[0061] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0062] The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the present invention to only specific implementation methods.

Claims

1. A welding device for an automobile door sill assembly with an automatic feeding mechanism, comprising workbenches (1) arranged at intervals and a welding seat (4) rotatably arranged on the workbenches (1), characterized in that: A docking assembly (6) for matching a threshold outer plate and a threshold inner plate of an automobile threshold assembly is slidably mounted on the welding seat (4), and the docking assembly (6) comprises a supporting plate (603) and a material receiving plate (604) which are arranged obliquely to each other; A loading assembly for loading materials of the threshold outer plate is installed on one side of the welding seat (4), and the loading assembly includes a loading box (3) symmetrically arranged and in contact with the side of the welding seat (4); a displacement assembly (7) for turning the threshold outer plate is installed between the ends of the loading box (3) close to the welding seat (4), and the displacement assembly (7) includes a hinged rod 1 (703) and a hinged rod 2 (704) hingedly arranged on a rotating seat (701), and a fixed clamping plate (705) and a movable clamping plate (706) for clamping the threshold outer plate are installed on the upper end of the hinged rod 2 (704), and the hinged rod 1 (703) and the hinged rod 2 (704) move the threshold outer plate to the supporting plate (603) and the material receiving plate (604) through a rotating fulcrum; The docking assembly (6) further comprises a movable plate (601) arranged on the welding seat (4), brackets (602) are symmetrically mounted on both sides of the middle of the movable plate (601), and upper rods (607) and lower rods (608) are spaced apart from each other between the brackets (602) in the same group; The supporting plate (603) is connected to the outer lower rod (608), the material receiving plate (604) is connected to the inner upper rod (607), the upper surfaces of the supporting plate (603) and the material receiving plate (604) overlap, and a limiting plate (606) is installed at the lower end of the supporting plate (603).

2. The automobile door sill assembly welding device with an automatic feeding mechanism according to claim 1 is characterized in that: A plurality of pulleys (9) are installed on the inner side of the loading box (3), a loading synchronous belt (10) is installed outside the plurality of pulleys (9), a vertical clamping groove (11) is provided on the outer side of the loading synchronous belt (10), and two loading synchronous belts (10) are clamped to the outer panel of the door sill through the same group of vertical clamping grooves (11).

3. The automobile door sill assembly welding device with an automatic feeding mechanism according to claim 1 is characterized in that: A pair of workbenches (1) are each provided with a rotating rod (14) at their upper ends, a driving structure being arranged outside the rotating rod (14), one end of the rotating rod (14) extending into the interior of the workbench (1) being connected to a welding seat (4), a docking slide rail (8) being provided on the welding seat (4), and the movable plate (601) being slidably connected to the docking slide rail (8).

4. The automobile door sill assembly welding device with an automatic feeding mechanism according to claim 3 is characterized in that: A batching seat (5) for loading materials on the inner plate of the threshold is arranged outside the welding seat (4), and a batching slide rail (13) matching the docking slide rail (8) is installed on the batching seat (5).

5. The automobile door sill assembly welding device with an automatic feeding mechanism according to claim 1 is characterized in that: A discharge platform (2) connected to a loading box (3) is installed at the bottom of a pair of the workbenches (1), and a conveyor belt for conveying automobile door sill assemblies is installed obliquely on the discharge platform (2).

6. The automobile door sill assembly welding device with an automatic feeding mechanism according to claim 1, characterized in that: The rotating fulcrum comprises a pin shaft respectively arranged between the hinged rod 1 (703) and the hinged rod 2 (704), and between the hinged rod 1 (703) and the rotating seat (701), and a driving motor for driving the hinged rod 1 (703) and the hinged rod 2 (704) to rotate is arranged outside the rotating fulcrum.

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