Automobile part welding production line

Abstract

The invention discloses an automobile part welding production line. Comprising a plurality of welding devices used for welding different positions of workpieces, a material carrying tool used for carrying the workpieces, a conveying line sequentially passing through the welding devices and used for moving the material carrying tool, a limiting mechanism and a material stabilizing mechanism, wherein the limiting mechanism and the material stabilizing mechanism are distributed at welding stations at intervals in the conveying direction of the conveying line. The conveying line is composed of a guide beam, a linkage mechanism and rolling wheels, the material carrying tool comprises a base, a positioning column and an elastic buffering piece, the material stabilizing mechanism is composed of a downward pressing assembly, a jacking assembly and a lifting assembly, and the limiting mechanism comprises a limiting frame, a jacking air cylinder and a limiting assembly. According to the welding device, the effects that the different positions of the workpiece can be welded in sequence, the material carrying tool can be limited to the welding station during welding, the workpiece is tightly pressed and stabilized, the friction force between the limiting assembly and the base is reduced, and it is guaranteed that the welding operation is conducted smoothly are achieved.

Description

Technical Field

[0001] This application relates to the field of automotive parts processing, and in particular to an automotive parts welding production line. Background Technology

[0002] In the current automotive manufacturing industry, welding technology, as a key process, directly impacts the quality and production efficiency of automotive parts. With the trend towards lightweight vehicles, the application of new materials such as aluminum alloys and high-strength steel in automobile manufacturing is becoming increasingly widespread, placing higher demands on welding technology. The stability of welding quality is crucial to the performance and safety of automotive parts, while production efficiency affects manufacturing costs and market competitiveness. Therefore, how to improve production efficiency while ensuring the stability of welding quality has become a significant challenge for the automotive manufacturing industry.

[0003] In the field of automotive parts welding, several methods have traditionally been used to weld different locations on automotive parts. One method involves repeatedly moving the workpiece between different welding machines, repositioning it after each move, and then performing the welding operation at the corresponding location. Another method involves manual operation, with workers using welding tools to weld different locations on the workpiece sequentially. Still other methods use simple conveyor devices to transport the workpiece to different welding stations, but these lack effective means for precise workpiece positioning and stable support.

[0004] However, existing welding methods have significant drawbacks. Repeated handling and repositioning of workpieces not only increases production time and reduces efficiency but also easily affects weld quality stability due to inaccurate positioning. Manual welding is labor-intensive, inefficient, and its quality is greatly influenced by worker skill level and working conditions. Simple conveying devices, lacking reliable limiting and stabilizing mechanisms, cannot guarantee workpiece stability during welding, also leading to unstable weld quality and failing to meet the automotive industry's dual requirements for welding quality and production efficiency. Summary of the Invention

[0005] In order to improve the welding production efficiency of automotive parts while ensuring the stability of workpiece welding quality, this application provides an automotive parts welding production line.

[0006] The automotive parts welding production line provided in this application adopts the following technical solution: An automotive parts welding production line includes: Several welding devices are used to weld different positions on the workpiece; Material-carrying fixtures are used to support workpieces. The conveyor line passes through several of the aforementioned welding equipment in sequence and is used to move the material-carrying fixtures containing workpieces to the welding stations of different welding equipment in turn, and to perform welding operations on different positions of the workpieces through different welding equipment. Several limiting mechanisms are distributed at intervals along the conveying direction of the conveyor line and are respectively arranged at the welding stations of several welding equipment. When the material-carrying fixture moves to the welding station of the welding equipment, the corresponding limiting mechanism moves into the travel path of the material-carrying fixture to restrict the material-carrying fixture at the welding station of the corresponding welding equipment, so that the welding equipment can weld the workpiece on the material-carrying fixture. When the welding equipment completes the welding operation, the limiting mechanism exits the travel path of the material-carrying fixture so that the material-carrying fixture can move into the welding station of the next welding equipment. Several material stabilizing mechanisms are distributed at intervals along the conveying direction of the conveyor line and are respectively arranged at the welding stations of several welding equipment. When the material-carrying fixture stops at the welding station of the welding equipment under the restriction of the limiting mechanism, the material stabilizing mechanism presses the workpiece.

[0007] By adopting the above technical solutions, the welding production line constructs a continuous and automated welding process through integrated welding equipment, material loading fixtures, conveyor lines, limiting mechanisms, and material stabilizing mechanisms. This allows workpieces to sequentially pass through multiple welding stations after a single clamping to complete welding operations at different positions. This effectively reduces repetitive workpiece positioning and intermediate handling steps, not only improving the overall efficiency of the production line but also ensuring the stability of welding quality through precise collaboration among the various stations. It is especially suitable for flexible production needs with multiple varieties and small batches.

[0008] Preferably, the conveyor line includes two parallel guide beams, two sets of linkage mechanisms, and several rollers. The rollers are disposed on the inner sides of the two guide beams and are rotatably connected to the guide beams. The rollers are spaced apart along the length of the guide beams. The two sets of linkage mechanisms are disposed inside the two guide beams. The linkage mechanisms are used to drive the rollers of the corresponding guide beams to rotate synchronously. The loading fixture is placed on the rollers on the inner sides of the two guide beams. The linkage mechanisms drive the rollers to rotate, thereby achieving the purpose of moving the loading fixture.

[0009] By adopting the above technical solution, the two guide beams and the inner rollers form a stable and reliable conveying track. The linkage mechanism ensures that all rollers rotate synchronously, providing a smooth and consistent driving force for the material-carrying tool, avoiding jamming or deviation caused by asynchronous conveying. This structure simplifies the transmission mechanism while ensuring conveying accuracy, and reduces the complexity of the equipment and maintenance costs.

[0010] Preferably, the material-carrying fixture includes a base, a plurality of positioning posts vertically arranged on the base, and a plurality of elastic buffers. The positioning posts are used to engage with the mounting holes of the workpiece. The plurality of elastic buffers correspond one-to-one with the plurality of positioning posts. The elastic buffers are sleeved on the outer periphery of the corresponding workpiece. When the plurality of mounting holes of the workpiece are inserted into the corresponding positioning posts, the elastic buffers on the outer periphery of the positioning posts support the workpiece.

[0011] By adopting the above technical solution, the insertion and engagement of the positioning post and the workpiece mounting hole achieves the initial accurate positioning of the workpiece, preventing it from moving on the base. The elastic buffer sleeved outside the positioning post supports the workpiece and absorbs the vibration or slight impact that may be generated during the movement of the material loading fixture, avoiding the problem of misalignment of parts caused by vibration. This not only ensures the positioning accuracy but also improves the stability and accuracy of the welding process.

[0012] Preferably, the material stabilizing mechanism includes a pressing component, a supporting component, and a lifting component. The pressing component is located above the travel path of the material-carrying fixture, and the supporting and lifting components are located below the travel path of the material-carrying fixture. When the material-carrying fixture stops at the welding station of the welding equipment under the restriction of the limiting mechanism, the lifting component lifts the base of the material-carrying fixture to lift the base of the material-carrying fixture away from the roller of the conveyor line; the supporting component supports the bottom of the workpiece, and the pressing component presses down on the top of the workpiece. Under the combined action of the supporting and pressing components, the workpiece is clamped to keep the workpiece stable on the elastic buffer of the material-carrying fixture.

[0013] By adopting the above technical solution, after the material-carrying fixture is fixed at the welding station by the limiting mechanism, the lifting component first lifts the base and the workpiece away from the roller, eliminating the interference of the conveying system vibration on the welding; then the top support component supports the bottom of the workpiece from bottom to top, and the bottom pressing component presses the top of the workpiece from top to bottom. The two work together to form a stable clamp on the workpiece in the vertical direction, so that the workpiece can remain stable on the elastic buffer. This realizes the conversion of the workpiece between the top support component and the elastic buffer, providing a solid foundation for high-quality welding.

[0014] Preferably, the lifting assembly includes a lifting cylinder and a lifting plate disposed at the extension end of the lifting cylinder. When the material-carrying fixture stops at the welding station of the welding equipment under the restriction of the limiting mechanism, the lifting cylinder extends upward to drive the lifting plate to push the bottom of the base, thereby lifting the base of the material-carrying fixture away from the roller of the conveyor line.

[0015] By adopting the above technical solution, the lifting cylinder is used as a power source to drive the lifting plate to move vertically. The structure is simple and the response is fast. It can reliably lift the base away from the roller, so that the material loading tooling is separated from the conveyor line mechanically, creating stable working conditions for subsequent lifting and pressing operations, and avoiding positional changes caused by accidental rotation of the roller during the welding process.

[0016] Preferably, the top support assembly includes a plurality of top support cylinders and a top rod structure disposed at the telescopic end of the top support cylinders. The base is vertically perforated with a plurality of through holes through which the top rod structures can pass. When the material loading fixture stops at the welding station of the welding equipment under the restriction of the limiting mechanism, the plurality of top rod structures are aligned one by one with the plurality of through holes on the base, and extend upward through the top support cylinders. The top rod structures pass through the corresponding through holes until the top of the top rod structure reaches the bottom of the workpiece.

[0017] By adopting the above technical solution, multiple support cylinders can coordinate their movements, driving their respective push rod structures to precisely pass through the through holes on the base and directly abut against the bottom of the workpiece, thereby achieving uniform support of multiple support points on the bottom surface of the workpiece. This, in conjunction with the pressing component, forms a balanced clamping force, making it particularly suitable for welding sheet metal parts in automotive components where high flatness is required.

[0018] Preferably, the pressing assembly includes a vertical slide, a pressing arm vertically slidably connected to the vertical slide, and a pressing drive for driving the pressing arm to move up and down. When the material loading fixture stops at the welding station of the welding equipment under the restriction of the limiting mechanism, the pressing drive drives the pressing arm to move down until the bottom of the pressing arm presses against the top of the workpiece.

[0019] By adopting the above technical solution, the downward pressure drive component guides the downward pressure arm to move precisely vertically through the vertical slide, ensuring that the downward pressure is applied directly and evenly to the top of the workpiece. Its linkage with the top support component realizes the "sandwich" fixation of the workpiece. This design can effectively constrain the workpiece's degree of freedom in the Z-axis direction and ensure the quality of weld formation.

[0020] Preferably, the limiting mechanism includes a limiting frame disposed below the guide beam, a lifting cylinder installed on the limiting beam, and a limiting component disposed at the telescopic end of the lifting cylinder. When the material-carrying fixture moves to the welding station of the welding equipment, the lifting cylinder of the corresponding limiting mechanism pushes upward to lift the limiting component to the front of the material-carrying fixture, thereby blocking the material-carrying fixture at the welding station of the corresponding welding equipment.

[0021] By adopting the above technical solution, the lifting cylinder drives the limiting component to rise from below the guide beam, mechanically blocking the travel path of the material-carrying fixture, thus achieving hard limiting. This positioning method is more reliable than simple sensor detection, ensuring that the material-carrying fixture can accurately stop at the preset welding position, providing the prerequisite for a series of precise positioning operations such as subsequent lifting, supporting, and pressing.

[0022] Preferably, the limiting component includes a mounting base fixedly connected to the telescopic end of the lifting cylinder and a pulley rotatably connected to the mounting base. When the material-carrying fixture moves to the welding station of the welding equipment, the lifting cylinder of the corresponding limiting mechanism pushes upward to lift the pulley at the mounting shell to the front of the base of the material-carrying fixture, and the pulley blocks and limits the base of the material-carrying fixture. When the lifting component lifts the base of the material-carrying fixture, the pulley rotates as the base rises to reduce the friction between the limiting component and the base.

[0023] By adopting the above technical solution, the mounting base provides stable support for the pulley, and the rotation design of the pulley changes the sliding friction between the limiting component and the base to rolling friction when the lifting component lifts the base. This significantly reduces the contact resistance, ensuring the reliability of the limiting and avoiding unnecessary wear or damage to the lifting action or the equipment itself due to excessive friction.

[0024] In summary, this application includes at least one of the following beneficial technical effects: 1. The production line integrates welding equipment, material loading fixtures, conveyor lines, limiting mechanisms, and material stabilizing mechanisms to construct a continuous and automated welding process. This allows the workpiece to be clamped once and then sequentially passed through multiple welding stations to complete welding at different positions. This reduces the need for repeated workpiece positioning and intermediate handling, improves the overall efficiency of the production line, ensures the stability of welding quality, and is suitable for flexible production needs of multiple varieties and small batches. 2. Two guide beams and inner rollers form a stable and reliable conveying track. The linkage mechanism ensures that all rollers rotate synchronously, providing a smooth and consistent driving force for the material-carrying tool, avoiding jamming or offset problems caused by asynchronous conveying, simplifying the transmission mechanism while ensuring conveying accuracy, and reducing equipment complexity and maintenance costs. 3. The insertion and engagement of the positioning post with the workpiece mounting hole achieves the initial accurate positioning of the workpiece. The elastic buffer sleeved outside the positioning post supports the workpiece and absorbs the vibration or slight impact during the movement of the material-carrying tooling, preventing the workpiece from being misaligned due to vibration, ensuring positioning accuracy, and improving the stability and accuracy of the welding process. 4. The lifting component of the material stabilizing mechanism lifts the base and workpiece away from the rollers, eliminating the interference of the conveying system vibration on welding. The top support component and the bottom pressure component work together to form a stable clamp on the workpiece in the vertical direction, realizing the conversion of the workpiece support system and providing a solid foundation for high-quality welding. 5. The lifting cylinder of the limiting mechanism drives the limiting component to raise the partition loading fixture, achieving hard limiting and ensuring that the loading fixture stops accurately at the preset welding position. The pulley design of the limiting component reduces friction when the base is raised, ensuring the reliability of the limiting and avoiding equipment wear. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of an automotive parts welding production line according to an embodiment of this application.

[0026] Figure 2 This is a schematic diagram illustrating the fit and arrangement of various components in an automotive parts welding production line according to an embodiment of this application.

[0027] Figure 3 yes Figure 2 Enlarged diagram of point A in the middle.

[0028] Figure 4 This is a schematic diagram of the material-carrying tooling in an automotive parts welding production line according to an embodiment of this application.

[0029] Figure 5 This is a schematic diagram of the structure of a hidden material-carrying tooling in an automotive parts welding production line according to an embodiment of this application.

[0030] Figure 6 yes Figure 5 Enlarged diagram of point B in the middle.

[0031] Figure 7 This is a schematic diagram showing the positional relationship between the lifting assembly and the support assembly in an automotive parts welding production line according to an embodiment of this application.

[0032] Explanation of reference numerals in the attached drawings: 1. Conveyor line; 11. Guide beam; 12. Linkage mechanism; 13. Roller; 2. Welding equipment; 3. Pressing assembly; 31. Pressing drive component; 32. Vertical slide; 33. Pressing arm; 4. Workpiece; 5. Loading fixture; 51. Positioning column; 52. Elastic buffer; 53. Base; 531. Through hole; 54. Guide wheel; 6. Limiting mechanism; 61. Limiting frame; 62. Lifting cylinder; 63. Limiting assembly; 631. Mounting seat; 632. Pulley; 7. Mounting plate; 8. Top support assembly; 81. Top rod structure; 811. Horizontal top plate; 812. Vertical top rod; 82. Top support cylinder; 9. Lifting assembly; 91. Lifting cylinder; 92. Lifting plate. Detailed Implementation

[0033] The following is in conjunction with the appendix Figure 1-7 This application will be described in further detail.

[0034] This application discloses an automotive parts welding production line, referring to... Figures 1 to 3 The system includes several welding devices 2, a material-carrying fixture 5, a conveyor line 1, several limiting mechanisms 6, and several material-stabilizing mechanisms. The conveyor line 1 sequentially passes through several welding devices 2, enabling the material-carrying fixture 5, which carries the workpiece 4, to be moved sequentially to the welding positions of different welding devices 2, allowing welding operations to be performed on different positions of the workpiece 4 using different welding devices 2. The limiting mechanisms 6 are distributed at intervals along the conveying direction of the conveyor line 1 and are respectively arranged at the welding positions of several welding devices 2. When the material-carrying fixture 5 moves to a welding position of a welding device 2, the corresponding limiting mechanism 6 enters the travel path of the material-carrying fixture 5 and restricts the material-carrying fixture 5 to its corresponding position. At the welding station of welding equipment 2, the welding equipment 2 welds the workpiece 4 on the material carrier 5. After the welding equipment 2 completes the welding operation, the limiting mechanism 6 exits the travel path of the material carrier 5, allowing the material carrier 5 to move into the next welding station of welding equipment 2. Several material stabilizing mechanisms are distributed at intervals along the conveying direction of the conveyor line 1 and are respectively arranged at several welding stations of welding equipment 2. When the material carrier 5 stops at the welding station of welding equipment 2 under the restriction of the limiting mechanism 6, the material stabilizing mechanism presses the workpiece 4. This structural setting enables the welding production line to build a continuous and automated welding process, allowing the workpiece 4 to sequentially pass through multiple welding stations to complete welding operations at different positions after one clamping. This effectively reduces the repeated positioning and intermediate handling of the workpiece 4, not only improving the overall efficiency of the production line, but also ensuring the stability of welding quality through precise coordination of each station. It is especially suitable for flexible production needs of multiple varieties and small batches.

[0035] In this embodiment, welding equipment 2 is an automatic laser welding machine. Different welding equipment 2 performs precise welding on different positions of workpiece 4. Alternatively, welding equipment 2 can be a spot welding machine or an arc welding machine. Both electric welding and arc welding machines are equipped with cameras and supplementary lighting. Spot welding equipment is mainly used for welding thin-plate joints of automotive parts, such as the splicing of thin-plate outer shells of a car body. It consists of a transformer, electrodes, and a controller. The transformer converts the input voltage into a low-voltage, high-current suitable for spot welding. The electrodes are typically made of copper alloy, which has good electrical and thermal conductivity. The shape of their heads can be designed as flat, spherical, etc., depending on the welding location. The controller is used to precisely control parameters such as the welding current and energizing time to ensure the quality and strength of the weld.

[0036] Specifically, conveyor line 1 includes two parallel guide beams 11, two sets of linkage mechanisms 12, and several rollers 13. The guide beams 11 are typically made of high-strength metal materials, such as carbon steel or aluminum alloy, possessing good rigidity and stability, providing reliable support for the entire conveying system. Several rollers 13 are positioned inside the two guide beams 11 and rotatably connected to them. The rollers 13 can be made of rubber or metal with a hardened surface to improve hardness and wear resistance. The rollers 13 are spaced apart along the length of the guide beams 11. The two sets of linkage mechanisms 12 are positioned within the two guide beams 11, driving the corresponding rollers 13 to rotate synchronously. The linkage mechanism 12 can be a chain drive mechanism, consisting of a chain and sprockets. The sprockets are mounted on the shaft ends of the rollers 13, and the chain is wound around the sprockets. A motor drives one of the sprockets to rotate, thus achieving synchronous rotation of all rollers 13. Alternatively, it can be a belt drive mechanism, consisting of a belt and pulleys, with a similar principle to the chain drive mechanism. The material-carrying fixture 5 is placed on the rollers 13 inside the two guide beams 11. The rollers 13 are driven to rotate by the linkage mechanism 12 to achieve the purpose of moving the material-carrying fixture 5. The two guide beams 11 and the inner rollers 13 form a stable and reliable conveying track. The linkage mechanism 12 ensures that all rollers 13 rotate synchronously, providing a smooth and consistent driving force for the material-carrying fixture 5, avoiding jamming or deviation caused by asynchronous conveying. This structure simplifies the transmission mechanism while ensuring conveying accuracy, reducing equipment complexity and maintenance costs.

[0037] Specifically, refer to Figure 3 and Figure 4The loading fixture 5 includes a base 53, several positioning posts 51 vertically arranged on the base 53, and several elastic buffers 52. The base 53 is generally made of thick steel plate, with sufficient strength and weight to ensure stable support of the workpiece 4. Rotatable guide wheels 54 are installed on both sides of the base 53. When the loading fixture 5 moves on the conveyor line 1, the two sides of the base 53 abut against the inner wall of the guide beam 11 through the guide wheels 54, thereby reducing the friction between the base 53 and the guide beam 11. The positioning posts 51 are usually made of stainless steel and have undergone precision machining to ensure their dimensional accuracy and surface finish, and are used to insert and fit with the mounting holes of the workpiece 4. The elastic buffers 52 can be rubber sleeves or springs, corresponding one-to-one with the positioning posts 51, and are fitted around the corresponding workpiece 4. When the mounting holes of the workpiece 4 are inserted into the corresponding positioning posts 51, the elastic buffers 52 around the positioning posts 51 support the workpiece 4. The insertion and engagement of the positioning post 51 with the mounting hole of the workpiece 4 achieves the initial precise positioning of the workpiece 4, preventing it from moving on the base 53. The elastic buffer 52 sleeved outside the positioning post 51 supports the workpiece 4 and absorbs the vibration or slight impact that may be generated during the movement of the material loading fixture 5, avoiding the misalignment of parts caused by vibration of the workpiece 4. This ensures positioning accuracy and improves the stability and accuracy of the welding process.

[0038] Reference Figures 4 to 6 Specifically, the material stabilizing mechanism includes a pressing component 3, a supporting component 8, and a lifting component 9. The pressing component 3 is located above the travel path of the material-carrying fixture 5, while the supporting component 8 and the lifting component 9 are located below the travel path of the material-carrying fixture 5. When the material-carrying fixture 5 stops at the welding station of the welding equipment 2 under the restriction of the limiting mechanism 6, the lifting component 9 lifts the base 53 of the material-carrying fixture 5 to lift the base 53 of the material-carrying fixture 5 away from the roller 13 of the conveyor line 1; the supporting component 8 supports the bottom of the workpiece 4, and the pressing component 3 presses down on the top of the workpiece 4. Under the combined action of the supporting component 8 and the pressing component 3, the workpiece 4 is clamped to keep it stable on the elastic buffer 52 of the material-carrying fixture 5.

[0039] Reference Figure 6 and Figure 7Specifically, the lifting assembly 9 includes a lifting cylinder 91 and a lifting plate 92 located at the extension end of the lifting cylinder 91. A mounting plate 7 is fixed below the two guide beams 11, and the lifting cylinder 91 is vertically fixed to the mounting plate 7. The lifting cylinder 91 can be a common pneumatic cylinder or a hydraulic cylinder, selected according to the actual load and working requirements. The lifting plate 92 is generally made of steel plate with a flat surface to ensure uniform pushing force on the base 53. When the material-carrying fixture 5 stops at the welding station of the welding equipment 2 under the restriction of the limiting mechanism 6, the lifting cylinder 91 extends upward to drive the lifting plate 92 to push the bottom of the base 53, thereby lifting the base 53 of the material-carrying fixture 5 away from the roller 13 of the conveyor line 1. The lifting cylinder 91 serves as a power source, driving the lifting plate 92 to move vertically. It has a simple structure and responds quickly, reliably lifting the base 53 away from the roller 13, thus separating the material-carrying fixture 5 from the conveyor line 1. This creates stable working conditions for subsequent lifting and pressing operations, and avoids positional changes caused by accidental rotation of the roller 13 during the welding process.

[0040] Specifically, the top support assembly 8 includes several top support cylinders 82 and a push rod structure 81 disposed at the telescopic end of the top support cylinders 82. The top support cylinders 82 are also installed on the mounting plate 7 below the guide beam 11, and can be either pneumatic or hydraulic cylinders depending on the actual situation. The push rod structure 81 specifically includes a horizontal top plate 811 and two vertical push rods 812 fixedly to the surface of the horizontal top plate 811. The telescopic end of the top support cylinders 82 is fixedly connected to the bottom of the horizontal top plate 811. The vertical push rods 812 have good rigidity and compressive strength. The base 53 has several through holes 531 vertically extending through it, allowing vertical push rods 812 to pass through. When the material-carrying fixture 5 stops at the welding station of the welding equipment 2 under the restriction of the limiting mechanism 6, the push rod structures 81 align one by one with the through holes 531 on the base 53. The push rod structures 81 extend upwards through the corresponding through holes 531 via the support cylinders 82, until the top of the push rod structure 81 reaches the bottom of the workpiece 4. Multiple support cylinders 82 can coordinate their actions, driving their respective push rod structures 81 to precisely pass through the through holes 531 on the base 53 and directly abut against the bottom of the workpiece 4, achieving uniform support at multiple support points on the bottom surface of the workpiece 4. This, combined with the pressing assembly 3, forms a balanced clamping force, making it particularly suitable for welding sheet metal parts in automotive components where high flatness is required.

[0041] It should be noted that, in order to avoid mutual interference between the top support assembly 8 and the lifting assembly 9 during operation, a clearance hole is provided through the middle of the horizontal top plate 811. The telescopic end of the lifting cylinder 91 passes through the clearance hole from bottom to top, and the lifting plate 92 is placed above the horizontal moving top plate. This avoids the lifting plate 92 and the horizontal top plate 811 moving upward sequentially when the top support assembly 8 and the lifting assembly 9 work together, thus preventing the horizontal top plate 811 and the lifting plate 92 from colliding with each other.

[0042] Specifically, the pressing assembly 3 includes a vertical slide 32, a pressing arm 33 vertically slidably connected to the vertical slide 32, and a pressing drive 31 for driving the pressing arm 33 to move up and down. The vertical slide 32 is usually made of channel steel or I-beams, providing good guiding performance. The pressing arm 33 can be a solid metal rod or a hollow tubular structure to reduce weight. The pressing drive 31 can be an electric push rod, a pneumatic cylinder, or a hydraulic cylinder. When the loading fixture 5 stops at the welding station of the welding equipment 2 under the restriction of the limiting mechanism 6, the pressing arm 33 is driven down by the pressing drive 31 until the bottom of the pressing arm 33 presses against the top of the workpiece 4. The downward driving component 31 guides the downward arm 33 to move precisely vertically through the vertical slide 32, ensuring that the downward pressure is applied directly and evenly to the top of the workpiece 4. Its linkage with the top support component 8 realizes the "sandwich" fixation of the workpiece 4. This design can effectively constrain the degree of freedom of the workpiece 4 in the Z-axis direction and ensure the quality of weld formation.

[0043] Specifically, the limiting mechanism 6 includes a limiting frame 61 located below the guide beam 11, a lifting cylinder 62 installed on the limiting beam, and a limiting component 63 located at the telescopic end of the lifting cylinder 62. The limiting frame 61 is generally welded from angle steel or channel steel, possessing sufficient strength and stability. The lifting cylinder 62 can be a common pneumatic lifting cylinder 62 or a hydraulic lifting cylinder 62. When the material-carrying fixture 5 moves to the welding station of the welding equipment 2, the corresponding lifting cylinder 62 of the limiting mechanism 6 pushes upward, raising the limiting component 63 to the front of the material-carrying fixture 5, thereby blocking the material-carrying fixture 5 at the corresponding welding station of the welding equipment 2. The lifting cylinder 62 drives the limiting component 63 to rise from below the guide beam 11, mechanically blocking the travel path of the material-carrying fixture 5 to achieve hard limiting. This positioning method is more reliable than simple sensor detection, ensuring that the material-carrying fixture 5 can accurately stop at the preset welding position, providing the prerequisite for a series of precise positioning operations such as subsequent lifting, supporting and pressing.

[0044] Reference Figures 4 to 6Specifically, the limiting component 63 includes a mounting base 631 fixedly connected to the telescopic end of the lifting cylinder 62 and a pulley 632 rotatably connected to the mounting base 631. The mounting base 631 is usually made of steel plate and has a certain thickness and strength, which can provide stable support for the pulley 632. The pulley 632 can be a rubber pulley 632, which has a certain buffering effect. When the material-carrying fixture 5 moves to the welding station of the welding equipment 2, the lifting cylinder 62 of the corresponding limiting mechanism 6 pushes upward to lift the pulley 632 at the mounting shell to the front of the base 53 of the material-carrying fixture 5, and the pulley 632 blocks and limits the base 53 of the material-carrying fixture 5. When the lifting component 9 lifts the base 53 of the material-carrying fixture 5, the pulley 632 rotates with the rise of the base 53 to reduce the friction between the limiting component 63 and the base 53. Mounting base 631 provides stable support for pulley 632. The rotational design of pulley 632 changes the sliding friction between limiting component 63 and base 53 to rolling friction when lifting component 9 lifts base 53. This significantly reduces contact resistance, ensuring the reliability of the limit and avoiding unnecessary wear or damage to the lifting action or the equipment itself due to excessive friction.

[0045] The implementation principle of this embodiment is as follows: This automotive parts welding production line integrates welding equipment 2, material-carrying fixture 5, conveyor line 1, limiting mechanism 6, and material stabilizing mechanism through an integrated design. Conveyor line 1 ensures stable transport of material-carrying fixture 5, limiting mechanism 6 ensures that material-carrying fixture 5 accurately stops at the welding station, and material stabilizing mechanism firmly clamps workpiece 4, allowing workpiece 4 to sequentially pass through multiple welding stations after a single clamping to complete welding operations at different positions. This design effectively reduces repetitive positioning and intermediate handling of workpiece 4, improving the overall efficiency of the production line. Simultaneously, the precise coordination between various mechanisms ensures the stability of welding quality, meeting the dual requirements of welding quality and production efficiency in the automotive manufacturing industry. It is particularly suitable for the flexible production needs of multi-variety, small-batch production, representing a significant improvement and enhancement compared to existing technologies.

[0046] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A welding production line for automotive parts, characterized in that: include: Several welding devices (2) are used to weld different positions of the workpiece (4); The material-carrying fixture (5) is used to support the workpiece (4); The conveyor line (1) passes through several welding equipment (2) in sequence and is used to move the material-carrying fixture (5) carrying the workpiece (4) to the welding station of different welding equipment (2) in sequence, and to perform welding operations on different positions of the workpiece (4) through different welding equipment (2). Several limiting mechanisms (6) are distributed at intervals along the conveying direction of the conveying line (1) and are respectively arranged at the welding stations of several welding equipment (2). When the material-carrying fixture (5) moves to the welding station of the welding equipment (2), the corresponding limiting mechanism (6) moves into the travel path of the material-carrying fixture (5) to restrict the material-carrying fixture (5) at the welding station of the corresponding welding equipment (2) so that the welding equipment (2) can weld the workpiece (4) on the material-carrying fixture (5). After the welding equipment (2) completes the welding operation, the limiting mechanism (6) exits the travel path of the material-carrying fixture (5) so that the material-carrying fixture (5) can move into the welding station of the next welding equipment (2). Several material stabilizing mechanisms are distributed at intervals along the conveying direction of the conveyor line (1) and are respectively arranged at the welding stations of several welding equipment (2). When the material loading fixture (5) stops at the welding station of the welding equipment (2) under the restriction of the limiting mechanism (6), the material stabilizing mechanism presses the workpiece (4).

2. The automotive parts welding production line according to claim 1, characterized in that: The conveyor line (1) includes two parallel guide beams (11), two sets of linkage mechanisms (12), and several rollers (13). The rollers (13) are placed inside the two guide beams (11) and rotatably connected to the guide beams (11). The rollers (13) are spaced apart along the length of the guide beams (11). The two sets of linkage mechanisms (12) are placed inside the two guide beams (11). The linkage mechanisms (12) are used to drive the rollers (13) of the corresponding guide beams (11) to rotate synchronously. The loading fixture (5) is placed on the rollers (13) inside the two guide beams (11). The rollers (13) are driven to rotate by the linkage mechanisms (12) to achieve the purpose of moving the loading fixture (5).

3. The automotive parts welding production line according to claim 2, characterized in that: The loading fixture (5) includes a base (53), a plurality of positioning posts (51) vertically arranged on the base (53), and a plurality of elastic buffers (52). The positioning posts (51) are used to be inserted into the mounting holes of the workpiece (4). The plurality of elastic buffers (52) correspond one-to-one with the plurality of positioning posts (51). The elastic buffers (52) are sleeved on the outer periphery of the corresponding workpiece (4). When the plurality of mounting holes of the workpiece (4) are inserted into the corresponding positioning posts (51), the plurality of elastic buffers (52) on the outer periphery of the positioning posts (51) support the workpiece (4).

4. The automotive parts welding production line according to claim 3, characterized in that: The material stabilizing mechanism includes a pressing component (3), a supporting component (8), and a lifting component (9). The pressing component (3) is located above the travel path of the material-carrying fixture (5), and the supporting component (8) and the lifting component (9) are located below the travel path of the material-carrying fixture (5). When the material-carrying fixture (5) stops at the welding station of the welding equipment (2) under the restriction of the limiting mechanism (6), the lifting component (9) lifts the base (53) of the material-carrying fixture (5) to lift the base (53) of the material-carrying fixture (5) away from the roller (13) of the conveyor line (1). The supporting component (8) supports the bottom of the workpiece (4), and the pressing component (3) presses down on the top of the workpiece (4). Under the combined action of the supporting component (8) and the pressing component (3), the workpiece (4) is clamped to keep the workpiece (4) stable.

5. The automotive parts welding production line according to claim 4, characterized in that: The lifting assembly (9) includes a lifting cylinder (91) and a lifting plate (92) disposed at the telescopic end of the lifting cylinder (91). When the material loading fixture (5) stops at the welding station of the welding equipment (2) under the restriction of the limiting mechanism (6), the lifting cylinder (91) extends upward to drive the lifting plate (92) to push the bottom of the base (53) so as to lift the base (53) of the material loading fixture (5) away from the roller (13) of the conveyor line (1).

6. The automotive parts welding production line according to claim 4, characterized in that: The top support assembly (8) includes several top support cylinders (82) and a top rod structure (81) disposed at the telescopic end of the top support cylinder (82). The base (53) has several through holes (531) through which the top rod structure (81) can pass. When the material loading fixture (5) stops at the welding station of the welding equipment (2) under the restriction of the limiting mechanism (6), the several top rod structures (81) are aligned with the several through holes (531) at the base (53) one by one, and extend upward through the top support cylinder (82). The top rod structure (81) passes through the corresponding through hole (531) until the top of the top rod structure (81) reaches the bottom of the workpiece (4).

7. The automotive parts welding production line according to claim 4, characterized in that: The pressing assembly (3) includes a vertical slide (32), a pressing arm (33) vertically slidably connected to the vertical slide (32), and a pressing drive (31) for driving the pressing arm (33) to move up and down. When the material loading fixture (5) stops at the welding station of the welding equipment (2) under the restriction of the limiting mechanism (6), the pressing arm (33) is driven to move down by the pressing drive (31) until the bottom of the pressing arm (33) is pressed against the top of the workpiece (4).

8. The automotive parts welding production line according to claim 3, characterized in that: The limiting mechanism (6) includes a limiting frame (61) set below the guide beam (11), a lifting cylinder (62) installed on the limiting beam, and a limiting component (63) set at the telescopic end of the lifting cylinder (62). When the material loading fixture (5) moves to the welding station of the welding equipment (2), the lifting cylinder (62) of the corresponding limiting mechanism (6) pushes upward to lift the limiting component (63) to the front of the material loading fixture (5) so as to block the material loading fixture (5) at the welding station of the corresponding welding equipment (2).

9. The automotive parts welding production line according to claim 8, characterized in that: The limiting component (63) includes a mounting base (631) fixedly connected to the telescopic end of the lifting cylinder (62) and a pulley (632) rotatably connected to the mounting base (631). When the material-carrying fixture (5) moves to the welding station of the welding equipment (2), the lifting cylinder (62) of the corresponding limiting mechanism (6) pushes upward to lift the pulley (632) at the mounting shell to the front of the base (53) of the material-carrying fixture (5), and the pulley (632) blocks and limits the base (53) of the material-carrying fixture (5). When the lifting component (9) lifts the base (53) of the material-carrying fixture (5), the pulley (632) rotates as the base (53) rises to reduce the friction between the limiting component (63) and the base (53).

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