A multi-point welding auxiliary structure for automobile carriages

Abstract

This invention relates to the field of automotive body processing technology, specifically to a multi-point welding auxiliary structure for automotive bodies, including a tilting frame, a reference frame, a moving unit, and a guiding assembly. In this invention, the position of the body panel is mechanically locked, and a reference for the body panel is determined, thereby dividing the welding area of ​​the body panel into multiple different welding areas for sequential zone welding. The mechanical clamping and locking method not only improves the stability of the welding process at multiple points but also enhances welding accuracy. Furthermore, during each zone welding process, the guiding assembly guides the movement of the welding head, maintaining the welding distance and angle between the welding head and the welding point, adapting to the different welding requirements of protruding and concave sections. Therefore, while improving welding accuracy, it ensures that the welding quality at each point meets the requirements.

Description

Technical Field

[0001] This invention relates to the field of automobile body processing technology, specifically to a multi-point welding auxiliary structure for automobile bodies. Background Technology

[0002] As a core component that carries goods and ensures driving safety, the manufacturing process of a truck body directly affects its structural strength, durability, and production efficiency. For example, in the welding process of the truck body panels, a multi-point welding method is usually adopted. The main process is to weld the connection between the lining plate and the panel to obtain the required truck body panels.

[0003] It should be noted that, see [reference] Figure 8 The lining plate is composed of multiple continuous protrusions and intermittent concave protrusions. Therefore, it is necessary to adaptively connect the contact position and weld during the welding process. The current welding process is as follows: the roller conveyor transports the carriage plate (which has not yet been welded) to the set position, and the carriage plate is flipped by hydraulic push so that the lining plate and the panel in the carriage plate are vertically and tightly attached. Then, the existing scanning device is driven by the robotic arm to scan the welding area and weld it by laser welding.

[0004] The existing welding process has the following problems: during the process of flipping the car body panel to a vertical position, the state of the car body panel is limited only by hydraulic pushing action. The limiting of the car body panel before and during welding is insufficient. Although laser scanning is used to compensate for some welding errors, the position reference is prone to shift due to insufficient limiting reference during operation, which ultimately affects the overall welding accuracy. Summary of the Invention

[0005] Therefore, it is necessary to provide a multi-point welding auxiliary structure for automobile bodies, which aims to solve the problems of the prior art.

[0006] This application provides a multi-point welding auxiliary structure for automobile carriages, which is installed on a roller conveyor and includes: a tilting frame, wherein the tilting frame is rotatably installed on the front side of the frame of the roller conveyor, and two clamping seats distributed on the left and right are fixedly installed on the front end face of the tilting frame.

[0007] A robotic arm is installed on the front side of the roller conveyor, and a welding head for laser welding is installed at the free end of the robotic arm.

[0008] The tilting frame is equipped with two reference frames distributed on the left and right, which are used to determine the reference after the carriage panel is tilted and vertical.

[0009] The flipping frame is fixedly equipped with guide rods extending left and right along the axis. A moving unit is slidably mounted on the guide rods. The moving unit is equipped with a positioning component for positioning the moving position. A guide component is mounted on the lower side of the moving unit. The guide component includes a bonding roller for bonding the car body panel and a guide frame for guiding the welding head.

[0010] After the clamping seat and the carriage panel are flipped, the left and right reference frames are used to position the left and right references. The positioning components are based on the references to position the welding area on the carriage panel and perform zoned welding according to the shape of the carriage. The bonding rollers are used to bond to the front face of the carriage and the guide frame guides the welding head to move. In summary, a welding operation is formed by left and right positioning, zoned guidance and sequential welding.

[0011] According to an advantageous embodiment, the roller conveyor has two hydraulic cylinders arranged on the frame, one on each side, and a push plate is provided on the telescopic ends of the two hydraulic cylinders.

[0012] The reference frame on the left is fixedly mounted on the front frame of the roller conveyor, while the reference frame on the right is slidably mounted on the front end face of the tilting frame via a sliding rod extending forward and backward along its axis.

[0013] According to an advantageous embodiment, the guide rod is fixedly mounted on the left reference frame and the front frame of the roller conveyor, and a U-shaped opening facing forward is fixedly mounted on the front end face of the right reference frame.

[0014] According to an advantageous embodiment, both horizontal segments of the card block are provided with limit blocks that slide up and down via spring rods, and the front and rear sides of the opposite ends of the two limit blocks are chamfered.

[0015] According to an advantageous embodiment, the distance between the two reference frames is the same as the length of the carriage panel, and baffles are fixedly provided on the opposite surfaces of the two reference frames, with the baffles aligned with the front side of the clamping seat.

[0016] According to an advantageous embodiment, the positioning component includes a slide block, and two slide blocks are slidably disposed on the guide rod, with a connecting frame provided on the rear end face of the two slide blocks, and the guide component is disposed on the connecting frame.

[0017] An installation rod is fixedly installed on the upper side of the guide rod. Multiple movable blocks are slidably sleeved on the installation rod, distributed equidistantly from left to right. A receiver is fixedly installed on the lower end face of the movable block, and a transmitter is fixedly installed on the upper end face of the left slide block.

[0018] Adjust the spacing between two adjacent moving blocks to be the same as the length of each section on the carriage panel.

[0019] According to an advantageous embodiment, a lifting block corresponding to a slide block is slidably disposed on the front end face of the connecting frame, the lifting block is fixedly connected to the slide block, and a threaded rod with a vertical axis corresponding to the lifting block is rotatably disposed on the connecting frame, the threaded rod threaded through the lifting block.

[0020] According to an advantageous embodiment, the guiding assembly further includes a transverse block, the lower end face of the connecting frame is slidably provided with the transverse block, and a U-shaped frame is provided on the transverse block via a spring rod and a sliding rod, and the axis of the bonding roller is vertical and rotatably provided on the U-shaped frame.

[0021] According to an advantageous embodiment, the guide frame is fixedly disposed on the lower side of the U-shaped frame. The guide frame is divided into a vertical section and an inclined section that tilts forward from top to bottom. A mating groove is provided on the inclined section of the guide frame, and a mating ring is fixedly sleeved on the welding head.

[0022] In summary, the present invention has the following beneficial effects: The present invention uses a mechanical locking mechanism to position the carriage panel and determines the reference point of the carriage panel, thereby dividing the welding area of ​​the carriage panel into multiple different welding areas and performing sequential zone welding. The mechanical clamping and locking method not only improves the stability of multiple welding operations but also enhances welding accuracy. Furthermore, during each zone welding process, a guide component guides the movement of the welding head, maintaining the welding distance and angle between the welding head and the welding point, adapting to the different welding requirements of protruding and concave sections. Therefore, while improving welding accuracy, it ensures that the welding quality at each location meets the requirements. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0024] Figure 1 A first three-dimensional structural schematic diagram of a multi-point welding auxiliary structure for an automobile compartment provided according to an embodiment of the present invention is shown.

[0025] Figure 2 A second three-dimensional structural schematic diagram of a multi-point welding auxiliary structure for an automobile compartment provided according to an embodiment of the present invention is shown.

[0026] Figure 3 A three-dimensional structural diagram of a carriage panel in a flat position according to an embodiment of the present invention is shown.

[0027] Figure 4 A three-dimensional structural diagram of a carriage panel in a vertical state is shown according to an embodiment of the present invention.

[0028] Figure 5 The present invention provides an embodiment of the invention. Figure 4 Enlarged view of point A in the middle.

[0029] Figure 6 A three-dimensional structural diagram of the reference frame, slide, and connecting frame provided according to an embodiment of the present invention is shown.

[0030] Figure 7 A left view is shown between the U-shaped frame, bonding roller, and guide frame provided according to an embodiment of the present invention.

[0031] Figure 8 A three-dimensional structural schematic diagram of a carriage panel provided according to an embodiment of the present invention is shown.

[0032] The above-mentioned figures include the following reference numerals: 1. Tilting frame; 10. Hydraulic cylinder; 11. Push plate; 12. Auxiliary plate; 13. Sliding rod; 2. Clamping seat; 20. Support roller; 3. Robotic arm; 30. Welding head; 4. Reference frame; 5. Guide rod; 50. Locking block; 51. Limiting block; 52. Baffle; 6. Moving unit; 60. Positioning assembly; 600. Slide seat; 601. Connecting frame; 602. Mounting rod; 603. Moving block; 604. Receiver; 605. Transmitter; 61. Lifting block; 610. Threaded rod; 70. Guide assembly; 700. Bonding roller; 701. Guide frame; 702. Transverse block; 703. U-shaped frame; 704. Mating groove; 705. Mating ring; 8. Roller conveyor. Detailed Implementation

[0033] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0034] like Figure 1 and Figure 2 As shown, a multi-point welding auxiliary structure for automobile carriages is installed on a roller conveyor 8, including: a tilting frame 1. The tilting frame 1 is rotatably installed on the front side of the frame of the roller conveyor 8. The front end face of the tilting frame 1 is fixedly provided with two left and right distributed clamping seats 2 and multiple support rollers 20 that are equidistantly distributed from left to right and whose axes extend from front to back. The clamping seats 2 are U-shaped structures with U-shaped openings facing upwards. In order to avoid the clamping action interfering with the welding process, the length of the vertical section on the front side of the clamping seat 2 is less than the length of the vertical section on the rear side.

[0035] like Figure 1 and Figure 7 As shown, a robotic arm 3 is provided on the front side of the roller conveyor 8. The robotic arm 3 can move freely along the conveying direction of the roller conveyor 8. A welding head 30 for laser welding is provided at the free end of the robotic arm 3.

[0036] like Figure 1 and Figure 2 As shown, the tilting frame 1 is provided with two left and right distributed reference frames 4, which are used to determine the reference after the carriage panel is tilted and vertical.

[0037] like Figure 1 , Figure 2 , Figure 3 and Figure 7 As shown, a guide rod 5 extending left and right along the axis is fixedly installed between the tilting frame 1 on the left and the roller conveyor 8. A moving unit 6 is slidably installed on the guide rod 5. A positioning component 60 for positioning the moving position is installed inside the moving unit 6. A guide component 70 is installed on the lower side of the moving unit 6. The guide component 70 includes a bonding roller 700 for bonding the carriage panel and a guide frame 701 for guiding the welding head 30.

[0038] After the clamping seat 2 and the carriage panel are flipped, the left and right reference frames 4 are used to position the left and right references. The positioning component 60 is formed according to the references. The positioning component 60 positions the welding area on the carriage panel according to the references and performs partitioned welding according to the shape of the carriage. The bonding roller 700 is used to bond to the front face of the carriage and the guide frame 701 guides the welding head 30 to move. In summary, a welding operation is formed by left and right positioning, partitioned guidance and sequential welding.

[0039] During operation, the car body is conveyed from left to right to the set position by the roller conveyor 8. The right reference frame 4 prevents the car body from moving further. At this time, the front side of the car body is located in the clamping seat 2. The tilting frame 1 tilts to the vertical position synchronously with the car body through the clamping seat 2. At this time, the left and right reference frames 4 are attached to the car body to form the reference on the left and right sides. At the same time, the car body is attached to the support roller 20 under its own gravity. That is, the position of the support roller 20 is used as the reference on the upper and lower sides.

[0040] After the car body panel is flipped vertically, the moving unit 6 is positioned relative to the leftmost partition on the car body panel using a positioning reference method. The bonding roller 700 in the guide assembly 70 is bonded to the corresponding partition, and the guide frame 701 is moved to the set position. The robotic arm 3 engages the welding head 30 with the guide frame 701 and maintains this state during the welding process. Then, the robotic arm 3 moves the guide frame 701 to the right, and the bonding roller 700 guides the movement of the welding head 30 through the guide frame 701. Within the same partition, the front and rear distance of the welding head 30 is adaptively adjusted to adapt to the welding requirements of the curved path in each partition. After the welding operation in a single partition is completed, the moving unit 6 moves the guide assembly 70 and positions the next partition through the positioning unit, and repeats the above operation process. The welding operation of the car body is completed through multiple welding operations.

[0041] Then, by flipping the carriage panel to the other side, the above welding process is repeated to finally complete the multi-point welding of the carriage panel.

[0042] like Figure 1 and Figure 2 As shown, the roller conveyor 8 has two hydraulic cylinders 10 arranged on the left and right sides on the frame. The extension and retraction ends of the two hydraulic cylinders 10 are jointly provided with push plates 11, and auxiliary plates 12 are movably installed on both the upper and lower sides of the push plates 11.

[0043] like Figure 1 and Figure 3 As shown, the reference frame 4 on the left is fixedly mounted on the front frame of the roller conveyor 8, and the reference frame 4 on the right is slidably mounted on the front end face of the tilting frame 1 via a sliding rod 13 extending back and forth along the axis. The reference frame 4 on the right is controlled by an external cylinder (not shown in the figure) to slide along the axis of the sliding rod 13.

[0044] In the initial state, the tilting frame 1 is laid flat, the opening of the clamping seat 2 faces the rear, the right reference frame 4 is attached to the tilting frame 1, and the car body is blocked at the set position. Then the roller conveyor 8 transports the car body, the car body moves to the right and is blocked by the right reference frame 4 to continue moving to the right. At this time, the front side of the car body is located in the clamping seat 2. The hydraulic cylinder 10 works so that its extension end pushes the push plate 11. The push plate 11 and the auxiliary plate 12 push the car body, and the car body flips to a vertical state with the axis of the tilting frame 1. After the car body is vertical, the car body moves down under its own weight and contacts the support roller 20. At the same time, the right reference frame 4 and the car body rotate synchronously, and the left and right reference frames 4 are attached to the sides of the car body respectively. At this time, the left and right references and the upper and lower references of the car body are aligned.

[0045] It should be further explained that during the process of pushing the car body panel to flip, the auxiliary plate 12 extends beyond the push plate 11 to ensure that the entire car body panel can be pushed to the set position by force, thus avoiding the problem that the small single working area of ​​the push plate 11 affects the flipping process. Secondly, after the welding is completed, the car body panel and the right reference frame 4 flip and reset to the horizontal state. The external cylinder works to make the right reference frame 4 move upward to avoid the impact. Then the roller conveyor 8 transports the car body panel after welding.

[0046] like Figure 3 and Figure 4 As shown, the guide rod 5 is fixedly mounted on the front frame of the left reference frame 4 and the roller conveyor 8, and a U-shaped opening with a front-facing locking block 50 is fixedly mounted on the front end face of the right reference frame 4.

[0047] like Figure 3 , Figure 4 and Figure 5 As shown, the two horizontal sections of the card block 50 are each equipped with a limit block 51 that slides up and down via a spring rod. The front and rear sides of the opposite ends of the two limit blocks 51 are chamfered.

[0048] like Figure 4 , Figure 5 and Figure 7 As shown, the distance between the two reference frames 4 is the same as the length of the carriage panel, and baffles 52 are fixedly installed on the opposite surfaces of the two reference frames 4. The baffles 52 are aligned vertically with the front side of the clamping seat 2.

[0049] After the tilting frame 1 is tilted, the two baffles 52 on the left and right serve as positioning references for the front end of the carriage panel. Then, as the push plate 11 continues to push the carriage panel, the front end of the carriage panel presses against the front side of the clamping seat 2 and the baffles 52. At this point, the carriage panel moves to the set position in the left-right, up-down, and front-back directions, completing the reference alignment.

[0050] Secondly, during the flipping process, the flipping frame 1 drives the right reference frame 4 to flip synchronously. The right reference frame 4 drives the locking block 50 and the limiting block 51 on it to flip synchronously. After the limiting block 51 contacts the guide rod 5, the spring rod is compressed. Finally, the guide rod 5 enters the U-shaped opening of the locking block 50. The limiting block 51 is reset under the elastic force generated by the deformation of the spring rod, sealing the guide rod 5 in the corresponding U-shaped opening. In this way, the left and right reference frames 4 are made to face each other, ensuring that the reference is consistent and forming the guide rail frame used for subsequent guiding movement, thus improving the accuracy of the car body plate reference alignment.

[0051] like Figure 1 , Figure 3 and Figure 6As shown, the positioning component 60 includes a slide block 600. Two slide blocks 600 are slidably arranged on the guide rod 5. It should be noted that the slide blocks 600 are driven by external existing technology (such as electric slider traction, hydraulic traction, etc.) to move freely along the radial direction of the guide rod 5. The rear end faces of the two slide blocks 600 are jointly provided with a connecting frame 601, and the guide component 70 is disposed on the connecting frame 601.

[0052] An installation rod 602 is fixedly installed on the upper side of the guide rod 5. Multiple movable blocks 603 are slidably sleeved on the installation rod 602, which are equidistantly distributed from left to right. A receiver 604 is fixedly installed on the lower end face of the movable block 603, and a transmitter 605 is fixedly installed on the upper end face of the left slide block 600.

[0053] Adjust the spacing between two adjacent moving blocks 603 to be the same as the length of each section on the carriage panel.

[0054] After the baseline alignment of the carriage panels is completed, the area to be welded on the carriage panels is aligned with the set position. That is, when the connecting frame 601 is located at the leftmost position, the connecting frame 601 is aligned with the leftmost partition on the carriage panel. The moving block 603 is manually adjusted according to the spacing of each partition so that the spacing between two adjacent receivers 604 is the same as the left and right length of each partition of the carriage panel, thereby completing the partitioning action. To prevent the vibration generated during transportation from affecting the moving block 603, the moving block 603 can be reinforced after adjustment (not shown).

[0055] During the multi-point welding process of the subsequent welding head 30, as the connecting frame 601 moves the guiding component 70 to the right, the infrared signal emitted by the transmitter 605 is received by the corresponding receiver 604. The received signal is converted into an electrical signal and processed, and then converted into a digital signal and transmitted to the external control system (not shown in the figure). At this time, the connecting frame 601 is aligned with the corresponding welding section, and the connecting frame 601 and the slide 600 stop moving, completing the section alignment. Then, the corresponding welding operation is performed on the welding section. After completing a single welding operation, the above process is repeated to complete all welding processes on the carriage panel. In summary, by forming multiple welding sections according to the welding area of ​​the carriage panel in the above manner, and by positioning the receiver 604 and the transmitter 605, the connecting frame 601 is guided to move synchronously to the set position. Therefore, it is divided into separate welding operations for each welding section, which improves the welding accuracy.

[0056] like Figure 6 As shown, a lifting block 61 corresponding to the slide block 600 is slidably disposed on the front end face of the connecting frame 601. The lifting block 61 is fixedly connected to the slide block 600. A threaded rod 610 with a vertical axis and corresponding to the lifting block 61 is rotatably disposed on the connecting frame 601. The threaded rod 610 is threaded through the lifting block 61 and is connected to an external motor (not shown in the figure).

[0057] During operation, the external motor drives the threaded rod 610 to rotate synchronously. Through the cooperation between the threaded rod 610 and the lifting block 61, the lifting block 61 and the connecting frame 601 move relative to each other in the vertical direction. Therefore, the connecting frame 601 can drive the guide component 70 on it to move up and down, ensuring that the guide component 70 can be aligned with the welding position and adapt to welding requirements of different sizes (different positions).

[0058] like Figure 3 , Figure 6 and Figure 7 As shown, the guide assembly 70 also includes a transverse block 702. The transverse block 702 is slidably disposed on the lower end face of the connecting frame 601. A U-shaped frame 703 is disposed on the transverse block 702 via a spring rod and a front and rear sliding rod 13. The axis of the bonding roller 700 is vertical and rotatably disposed on the U-shaped frame 703.

[0059] like Figure 6 and Figure 7 As shown, the guide frame 701 is fixedly installed on the lower side of the U-shaped frame 703. The guide frame 701 is divided into a vertical section and an inclined section that tilts forward from top to bottom. A mating groove 704 is provided on the inclined section of the guide frame 701, and a mating ring 705 is fixedly sleeved on the welding head 30.

[0060] During operation, the rotation of the threaded rod 610 adjusts the axis of the mating groove 704 on the guide frame 701 to point towards the welding point. Secondly, during the process of the carriage panel being flipped vertically, the carriage panel contacts the bonding roller 700, gradually compressing the spring rod 2. Finally, when the carriage panel is vertical, the bonding roller 700 adheres to the area above the welding point of the carriage panel, and the elastic force generated by the deformation of the spring rod 2 keeps the bonding roller 700 tightly against the carriage panel. Therefore, in the subsequent welding process, when the robotic arm 3 drives the welding head 30 to insert into the corresponding mating groove 704, the mating ring 705 restricts the welding head 30 from moving further, thus controlling the distance between the welding head 30 and the carriage panel. The robotic arm 3 moves the welding head 30 to the right while simultaneously moving the guide frame 701. During this process, the bonding roller 700 moves from the concave section to the convex section of the corresponding welding area. The constant close contact of the bonding roller 700 ensures that the U-shaped frame 703 moves forward while moving to the right during this process. The U-shaped frame 703 drives the guide frame 701 to move forward synchronously. Therefore, in the concave or convex section of the welding area, the distance between the welding head 30 and the welding point is maintained by the bonding roller 700, ensuring that the welding distance is the set distance each time (i.e., the distance between the bonding roller 700 and the front side of the U-shaped frame 703; therefore, it should be noted that this distance has been obtained through multiple tests by the staff and meets the welding requirements. It is existing technology and will not be elaborated further). This avoids the problem of the welding head 30 and the welding point changing due to the movement of the welding, which affects the welding quality. In addition, it should be noted that an external existing laser scanning component can be added to the robotic arm 3 and the welding head 30. During the welding process, the reference is determined mechanically while laser scanning is used to double-protect the welding area, ensuring accurate welding and avoiding the problem of over-welding.

[0061] It should be further explained that the existing technology uses a method of laser scanning for positioning followed by welding. However, the position of the carriage panel is not sufficiently limited during the operation, which can easily lead to positional reference shifts during welding, affecting welding accuracy. This technical solution adds a reference frame 4, a guide rod 5, a moving unit 6, and a guiding component 70. With the help of the positioning component 60 in the reference frame 4 and the moving unit 6, the reference of the carriage panel is mechanically positioned and locked. At the same time, the shape of the welding area of ​​the carriage panel is divided into multiple different welding areas for zoned welding. In each welding area, the welding head 30 is guided to move by the guiding component 70 to maintain the welding distance and welding angle between the welding head 30 and the welding point. This can be combined with mechanical scanning technology to doubly and strictly ensure that the welding quality meets the requirements. Furthermore, the above-mentioned added components can be used for a long time after a single installation. The increased cost is negligible compared to the economic benefits brought by the improved welding quality. In summary, this technical solution is a specific improvement made entirely based on and to solve the defects of the existing technology.

[0062] In the description of this invention, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this invention and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this invention; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0063] Furthermore, the terms "first," "second," "number one," and "number two" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first," "second," "number one," or "number two" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0064] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "connected," "installed," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0065] The embodiments described herein are preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A multi-point welding auxiliary structure for automobile carriages, mounted on a roller conveyor, characterized in that, include: A tilting frame is rotatably mounted on the front side of the frame of the roller conveyor, and two clamping seats distributed on the left and right are fixedly mounted on the front end face of the tilting frame. A robotic arm is provided on the front side of the roller conveyor, and a welding head for laser welding is provided at the free end of the robotic arm. The tilting frame is equipped with two reference frames distributed on the left and right, which are used to determine the reference after the car body panel is tilted vertically. The flipping frame is fixedly provided with a guide rod extending left and right along its axis. A moving unit is slidably provided on the guide rod. A positioning component for positioning the moving position is provided inside the moving unit. A guide component is provided on the lower side of the moving unit. The guide component includes a bonding roller for bonding the car body panel and a guide frame for guiding the welding head. After the clamping seat and the carriage panel are flipped, the left and right reference frames are used to position the left and right references. The positioning component positions the welding area on the carriage panel according to the reference and performs partitioned welding according to the shape of the carriage. The bonding roller is used to bond to the front face of the carriage and the guide frame guides the welding head to move, forming a welding operation in which the left and right positioning cooperates with partitioned guidance and welding follows in sequence.

2. The multi-point welding auxiliary structure for automobile carriages according to claim 1, characterized in that: The roller conveyor is equipped with two hydraulic cylinders distributed on the left and right sides on the frame, and a push plate is provided on the telescopic ends of the two hydraulic cylinders. The reference frame on the left is fixedly mounted on the front frame of the roller conveyor, while the reference frame on the right is slidably mounted on the front end face of the tilting frame via a sliding rod extending forward and backward along its axis.

3. The multi-point welding auxiliary structure for automobile carriages according to claim 1, characterized in that: The guide rod is fixedly installed on the left reference frame and the front frame of the roller conveyor, and a U-shaped opening with a front-facing locking block is fixedly installed on the front end face of the right reference frame.

4. The multi-point welding auxiliary structure for automobile carriages according to claim 3, characterized in that: Both horizontal sections of the card block are equipped with limit blocks that slide up and down via spring rods, and the front and rear sides of the opposite ends of the two limit blocks are chamfered.

5. The multi-point welding auxiliary structure for automobile carriages according to claim 1, characterized in that: The distance between the two reference frames is the same as the length of the carriage panel, and baffles are fixedly installed on the opposite sides of the two reference frames, with the baffles aligned with the front side of the clamping seat.

6. The multi-point welding auxiliary structure for automobile carriages according to claim 1, characterized in that: The positioning component includes a slide block, and two slide blocks are slidably arranged on the guide rod. The rear end faces of the two slide blocks are provided with a connecting frame, and the guide component is arranged on the connecting frame. An installation rod is fixedly installed on the upper side of the guide rod. Multiple movable blocks are slidably sleeved on the installation rod and distributed at equal intervals from left to right. A receiver is fixedly installed on the lower end face of the movable block, and a transmitter is fixedly installed on the upper end face of the left slide block. Adjust the spacing between two adjacent moving blocks to be the same as the length of each section on the carriage panel.

7. The multi-point welding auxiliary structure for an automobile carriage according to claim 6, characterized in that: The front end face of the connecting frame is provided with a lifting block corresponding to the slide block, which is fixedly connected to the slide block. A threaded rod with a vertical axis corresponding to the lifting block is rotatably provided on the connecting frame, and the threaded rod thread passes through the lifting block.

8. The multi-point welding auxiliary structure for automobile carriages according to claim 6, characterized in that: The guiding assembly also includes a transverse block. The transverse block is slidably disposed on the lower end face of the connecting frame. A U-shaped frame is disposed on the transverse block via a spring rod and a sliding rod. The axis of the bonding roller is vertical and rotatably disposed on the U-shaped frame.

9. The multi-point welding auxiliary structure for automobile carriages according to claim 1, characterized in that: The guide frame is fixedly installed on the lower side of the U-shaped frame. The guide frame is divided into a vertical section and an inclined section that tilts forward from top to bottom. A mating groove is provided on the inclined section of the guide frame, and a mating ring is fixedly fitted on the welding head.

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