Welding equipment based on bilateral welding

Abstract

The welding equipment comprises a mechanical motion supporting module, a bilateral arc welding module, a welding station and a control module, the mechanical motion supporting module comprises a guide rail, a sliding table and a supporting unit, the supporting unit comprises a vertical support and a transverse support, the vertical support is fixedly connected to the sliding table, and the transverse support is fixedly connected to the sliding table. The transverse support is movably connected to the vertical support; the bilateral arc welding module comprises a preheating element, a bilateral arc welding gun, a multi-axis mechanical arm and a welding wire supply unit, the multi-axis mechanical arm is arranged on the transverse support and clamps the bilateral arc welding gun, and the welding wire supply unit is arranged on the sliding table and is connected with the bilateral arc welding gun; the welding station is arranged on one side of the mechanical movement supporting module. The control module is electrically connected with the mechanical motion supporting module and the bilateral arc welding module. The welding equipment is flexible to use, high in adaptability and capable of improving the overall welding efficiency.

Description

Technical Field

[0001] The utility model relates to the technical field of welding, in particular to a welding device based on bilateral welding. Background Art

[0002] With the rapid development of modern industry, welding technology is playing an increasingly important role in the manufacturing industry. Welding technology is widely used in automotive, aerospace, shipbuilding, construction, and machinery manufacturing. Traditional welding methods rely primarily on manual operation with a handheld welding torch, which requires high skill and experience, and can also result in poor welding quality. Therefore, manual welding is gradually being replaced by various intelligent welding devices.

[0003] Double-sided welding is a welding technology developed in recent years. Since the heat output of double-sided welding is uniform, the deformation generated during the welding process can be balanced. Therefore, it is particularly suitable for welding workpiece fillet welds. However, existing double-sided welding equipment has the following problems:

[0004] 1. Insufficient equipment flexibility

[0005] Existing bilateral welding guns have insufficient degrees of freedom and are very likely to interfere with the workpiece (for example, they cannot weld some internal elevation features). Therefore, the types of workpieces that can be welded are limited, and the scope of use of the equipment is restricted.

[0006] 2. Workpiece size limit

[0007] The multi-axis platform (or adjustable mechanism) of existing welding equipment has a small movable distance and limited movable directions, so the welded workpiece size is small and cannot meet the welding needs of large workpieces such as building materials.

[0008] 3. Limitation of welding material range

[0009] The applicable welding materials of existing welding equipment are limited, mainly low-strength steel materials. If existing equipment is used to weld medium and high-strength steel, cracks will occur, affecting the final welding quality.

[0010] 4. Supporting functions need to be improved

[0011] The supporting functions of existing welding equipment need to be improved. Most equipment only considers the movement of the welding gun and the welding process, but has not yet considered the supporting equipment architecture for welding wire supply. Therefore, the use process is inconvenient and often requires secondary development. Summary of the Invention

[0012] The technical problem to be solved by the utility model is to provide a welding device based on bilateral welding, which is flexible to use and highly adaptable.

[0013] In order to solve the above technical problems, the technical solution adopted by the present invention is a welding equipment based on bilateral welding, including a mechanical motion support module, a bilateral arc welding module, a welding station and a control module, the mechanical motion support module includes a guide rail, a slide and a support unit, the slide is movably connected to the guide rail, the support unit includes a vertical support and a transverse support, the vertical support is fixed to the slide, and the transverse support is movably connected to the vertical support; the bilateral arc welding module includes a preheating element, a bilateral arc welding gun, a multi-axis robotic arm and a welding wire supply unit, the multi-axis robotic arm is arranged on the transverse support and clamps the bilateral arc welding gun, the welding wire supply unit is arranged on the slide and connected to the bilateral arc welding gun, and the preheating element is arranged on the transverse support; the welding station is arranged on one side of the mechanical motion support module; the control module is electrically connected to the mechanical motion support module and the bilateral arc welding module.

[0014] Furthermore, there is more than one guide rail, and the slide is connected to the first servo motor, the transverse support is connected to the second servo motor, and the cross-sectional shape of the guide rail is V-shaped, T-shaped, H-shaped or I-shaped. The transverse support and the vertical support are box-shaped or circular. The welding wire supply unit includes a welding wire storage tank and a power distribution cabinet. The power distribution cabinet is equipped with an integrated programmable logic controller, which can receive and store signals from sensors and realize logical control functions. The welding station is arranged on the side of the guide rail, and the welding station module is a fixed platform, a mobile platform or a lifting platform, and a workpiece fixture is provided on the welding station. The preheating element is fixed or movable relative to the transverse support, and its working range covers the weld position of the workpiece to be welded on the welding station. There are two groups of multi-axis robotic arms, which are arranged at the bottom or side of the transverse support, and each robotic arm has four or more degrees of freedom. The bilateral arc welding module also includes a cooling element.

[0015] The beneficial effects that can be achieved by the utility model are:

[0016] 1. This application improves the flexibility of welding equipment by using a multi-axis robotic arm, which can weld complex workpiece features without interfering with the workpiece to be welded and the welding gun.

[0017] 2. This application expands the working range of the welding equipment by using a slide table, which helps to meet the welding needs of workpieces of different sizes.

[0018] 3. This application is equipped with a preheating element, which will preheat the workpiece before welding, which can reduce the residual stress generated by high-strength steel during the welding process, and appropriately reduce the hardness of the steel to improve the plasticity, so as to prevent the workpiece from cracking during the welding process and improve the welding quality.

[0019] 4. This application is equipped with a welding wire supply unit. The welding wire is continuously and automatically pulled out from the supply unit and sent to the welding point through the welding gun, which can improve the degree of automation of the welding equipment, reduce manual participation in the welding process, and improve the overall welding efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. The drawings described below are only some embodiments of the present invention, among which:

[0021] Figure 1 This is a schematic diagram of the main structure of a welding device based on bilateral welding according to the present application. DETAILED DESCRIPTION

[0022] The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only intended to explain the present invention and are not intended to limit the scope of the present invention. The structures, proportions, sizes, etc. illustrated in the accompanying drawings are only intended to match the contents disclosed in the specification so that people familiar with the technology can understand and read them. They are not intended to limit the applicable conditions of the present invention and therefore have no substantial technical significance. Any modification of the structure, change in the proportional relationship, or adjustment of the size should still fall within the scope of the technical content disclosed in the present invention without affecting the efficacy and purpose that the present invention can produce. At the same time, the terms such as "upper", "lower", "left", "right", "middle", and "one" cited in this specification are only for the sake of clarity of description and are not intended to limit the applicable scope of the present invention. Changes or adjustments in their relative relationships should also be considered as applicable scopes of the present invention without substantially changing the technical content.

[0023] See Figure 1 , which is a schematic diagram of the structure of a welding device based on bilateral welding in the present application. In this embodiment, the welding device includes a mechanical motion support module A, a bilateral arc welding module B, a welding station C, and a control module (not shown). The control module is electrically connected to the mechanical motion support module A, the bilateral arc welding module B, and the welding station C. The series of control operations in this application can be implemented by corresponding design using existing technologies.

[0024] The mechanical motion support module A includes a guide rail 2, a guide rail 3, a slide 4 and a support unit 5. The slide 4 is arranged on the two guide rails 2 and the guide rail 3, and the slide 4 can move smoothly on the guide rails 2 and 3 through the first servo motor. The support unit 5 includes a vertical support 6 and a transverse support 7. The vertical support 6 is fixed to the slide 4, and the transverse support 7 is movably connected to the vertical support 6 through the second servo motor. It can complete a certain vertical lifting stroke and transverse stroke relative to the vertical support 6 to complete the vertical relative position adjustment of the bilateral arc welding module B and the workpiece to be welded. In this embodiment, the vertical support and the transverse support are box-shaped. In some cases, there may be multiple vertical supports, and the setting position is not limited to one side, both sides and all around the welding station module. The single-sided setting can save the space area occupied by the mechanical motion module as a whole, and the double-sided or all around setting multiple vertical supports have stronger bearing capacity and stability. The guide rails 2 and 3 have high straightness and high load capacity, supporting the smooth and precise operation of the slide. The cross-sectional shape of the guide rails is not limited to V-shaped, T-shaped, H-shaped, I-shaped, etc. The mechanical motion support module A can achieve a stable and synchronized motion path for the heating double-sided arc welding module B during the welding process, so that the welding path can be adjusted in time to accommodate uneven or non-uniform welding areas.

[0025] The double-sided arc welding module B includes preheating elements 1, 8, double-sided arc welding guns 9, 10, multi-axis robotic arms 11, 12, and a welding wire supply unit 13. The multi-axis robotic arms 11, 12 are arranged on the transverse support 7 and clamp the double-sided arc welding guns 9, 10. The welding wire supply unit 13 is arranged on the slide 4 and connected to the double-sided arc welding guns 9, 10. The preheating element is arranged on the transverse support 7. The multi-axis robotic arms 11, 12 are inverted on the transverse support 7. The double-sided arc welding guns 9, 10 are clamped at the ends of the multi-axis robotic arms 11, 12 to complete the double-sided arc welding process. The preheating elements 1, 8 are arranged on the side of the transverse support 7 in the mechanical support unit. The welding wire supply unit 13 is arranged on the slide 4 and can move together with the slide. Therefore, the welding wire supply unit includes but is not limited to a welding wire storage tank and a power distribution cabinet. Preferably, the welding wire supply unit can use an automatic welding wire supply structure, which continuously pulls the welding wire from the reel through the control module, such as designing a reel structure, and delivers the welding wire to the welding point through the welding gun. The automatic welding wire supply structure also needs to have a welding wire guide structure to guide the welding wire from the reel structure to stably supply the welding wire automatically to the corresponding bilateral welding unit, and issue a prompt when the remaining welding wire is low. The preheating element 8 is installed on the transverse support. The installation method is not limited to fixed installation and sliding installation. The installation position is not limited to the bottom, side, etc. of the transverse support, and it does not interfere with the position of the multi-axis robot arm. The preheating element can be a heating plate, and its end working range can cover the weld position of the workpiece to be welded on the welding station module. The structure equipped with the preheating unit is not limited to an electric push rod, a manual adjustment structure, a multi-axis robot arm, a slide, etc. The preheating element will preheat the workpiece in advance before welding and reduce the cooling rate of the welding area. It can reduce the residual stress generated by high-strength steel during the welding process, and appropriately reduce the hardness of the steel to improve the plasticity, so as to prevent the workpiece from cracking during the welding process.

[0026] The multi-axis robotic arms 11 and 12 are mounted inverted on the lateral support 7, with mounting locations including, but not limited to, the bottom or side of the lateral support. Each robotic arm possesses four or more degrees of freedom, and cooperates with the movement of the mechanical motion support module to enable the multi-axis robotic arm's operating range to cover all weld locations. The multi-axis robotic arms 11 and 12 are connected to and fixed to the double-sided arc welding guns 9 and 10. This inverted mounting increases the lateral support load but also significantly expands the working space of the multi-axis robotic arms 11 and 12, making it easier for the multi-axis robotic arms to deliver the end double-sided arc welding guns to the inner corner welding area of ​​the workpiece.

[0027] The welding station C is located to the side of the mechanical motion support module A and can be used to place and secure the workpiece to be welded. The welding station is not limited to a fixed platform, a mobile platform, or a lifting platform. The welding station includes a workpiece fixture, and the fixture types are not limited to positioning fixtures, combination fixtures, and special customized fixtures. Preferably, an automated fixture can be used. In addition to securing the workpiece, the automated fixture can clamp the workpiece to complete rotation, translation, and other movements. In conjunction with the structural features of the multi-axis robotic arm unit, it can weld any side of the workpiece, thereby reducing operator loading and unloading time and improving welding efficiency.

[0028] When welding a workpiece, the multi-axis robotic arm unit and the mechanical motion support module work together to move the double-sided arc welding unit to the starting position of the workpiece weld seam. Once there, the double-sided arc welding unit begins the welding process, releasing the welding arc and providing gas shielding at the welding position. The shielding gas used includes, but is not limited to, argon, helium, nitrogen, carbon dioxide, and mixed gases. As the relative positions of the multi-axis robotic arm and the mechanical motion support module change, the double-sided arc welding unit continuously welds the entire weld seam.

[0029] In this embodiment, a cooling module (not shown in the figure) is also included. The control system uses sensors to identify the welding working status, identify the heat distribution of the welding module during welding, automatically pump coolant, and adjust the cooling intensity through adaptive pumping speed. The overheated parts are cooled accordingly, which can maintain the continuous operation of the double-sided arc welding gun within a suitable temperature range to prevent the welding gun from overheating.

[0030] The welding process of the welding equipment of this embodiment includes the following steps:

[0031] Step 1: Prepare the workpiece to be welded. The operator first secures the long wing and long web relative to each other using spot welding, ensuring accurate spot weld placement and controlling the number of weld points as needed to ensure uniform heating and welding throughout the entire process. The workpiece is then placed on the welding station, secured using the appropriate securing method based on its shape, size, and welding location. Ensure the workpiece is positioned correctly, angled, and supported.

[0032] In step 2, the operator sends a command to the control module to move the slide, vertical support and horizontal support to the starting position, checks the remaining welding wire and feeds the welding wire from the welding wire supply unit into the double-sided arc welding unit.

[0033] Step 3: The operator adjusts the position of the preheating element to near the welding area, and the slide moves to start preheating the workpiece.

[0034] In step 4, after the workpiece is preheated and before cooling, the multi-axis robot arm moves the double-sided arc welding gun at its end to the welding area of ​​the inner corner of the workpiece, starts the double-sided arc welding unit and moves the slide at the same time. Two welds can be completed in the double-sided welding area. Since there are two double-sided arc welding guns releasing arcs on both sides at the same time, the workpiece will not be thermally deformed due to the large temperature difference on both sides during the welding process.

[0035] Preferably, step 2 can be automatically completed by a control module. To ensure the movement accuracy, the control module can have a calibration function and a position, speed and feed rate feedback function.

[0036] In this embodiment, the workpiece is a long, high-strength I-beam. The process in which the slide moves the transverse support parallel to one end of the workpiece and then returns to its original position can be referred to as a reciprocating cycle. The preheating process in step 3 is a reciprocating cycle, and the welding process of the double-sided arc welding module in step 4 is another reciprocating cycle. This allows the two processes to be relatively independent and the control programs will not interfere with each other. Preferably, more precise temperature control can be used to complete steps 3 and 4 in a reciprocating cycle. The workpiece is first heated by the preheating element, and the welding process is precisely started when it cools to a preset temperature.

[0037] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A welding device based on bilateral welding, comprising a mechanical motion support module, a bilateral arc welding module, a welding station and a control module, characterized in that: The mechanical motion support module includes a guide rail, a slide and a support unit, the slide is movably connected to the guide rail, the support unit includes a vertical support and a horizontal support, the vertical support is fixed to the slide, and the horizontal support is movably connected to the vertical support; The double-sided arc welding module includes a preheating element, a double-sided arc welding gun, a multi-axis robot arm and a welding wire feeding unit. The multi-axis robot arm is arranged on the transverse support and clamps the double-sided arc welding gun. The welding wire feeding unit is arranged on the slide and connected to the double-sided arc welding gun. The preheating element is arranged on the transverse support. The welding station is arranged on one side of the mechanical motion support module; The control module is electrically connected to the mechanical motion support module and the double-sided arc welding module.

2. The welding equipment based on bilateral welding according to claim 1, characterized in that: There are more than one guide rails, and the slide is connected to a first servo motor, the transverse support is connected to a second servo motor, and the cross-sectional shape of the guide rails is V-shaped, T-shaped, H-shaped or I-shaped.

3. The welding equipment based on bilateral welding according to claim 1, characterized in that: The horizontal supports and vertical supports are box-shaped or circular.

4. The welding equipment based on bilateral welding according to claim 1, characterized in that: The welding wire supply unit includes a welding wire storage tank and a power distribution cabinet. The power distribution cabinet is equipped with an integrated programmable logic controller that can receive and store signals from sensors and realize logic control functions.

5. The welding equipment based on bilateral welding according to claim 1, characterized in that: The welding station is arranged on the side of the guide rail, the welding station module is a fixed platform, a movable platform or a lifting platform, and a workpiece fixture is arranged on the welding station.

6. The welding equipment based on bilateral welding according to claim 1, characterized in that: The preheating element is fixed relative to the transverse support or can be relatively moved, and its working range covers the position of the weld seam of the workpiece to be welded on the welding station.

7. The welding equipment based on bilateral welding according to claim 1, characterized in that: The multi-axis robotic arms are divided into two groups and are arranged at the bottom or side of the lateral support, and each robotic arm has four or more degrees of freedom.

8. The welding equipment based on bilateral welding according to claim 1, characterized in that: The double-sided arc welding module also includes a cooling element.

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