Single-wire and double-wire welding gun switching device and method

Abstract

The invention discloses a single-wire and double-wire welding gun switching device which comprises a supporting plate, the supporting plate is connected with a robot, a driving air cylinder is arranged on the supporting plate, a first welding gun and a second welding gun are further arranged on the supporting plate in parallel, the driving air cylinder is connected with the first welding gun, and the driving air cylinder is connected with the second welding gun. The driving air cylinder drives the first welding gun to ascend and descend relative to the second welding gun so as to adjust the height of the first welding gun relative to the second welding gun, and single-wire welding and double-wire welding are achieved for welding seams. According to the single-wire and double-wire welding gun switching device, the first welding gun and the second welding gun are arranged on the supporting plate in parallel, the driving air cylinder is connected with the first welding gun, and the driving air cylinder drives the first welding gun to ascend and descend relative to the second welding gun so that the height of the first welding gun relative to the second welding gun can be adjusted, and single-wire welding and double-wire welding can be achieved for welding seams; and the single-wire and double-wire switching is quickly realized through the driving cylinder, so that the time is saved, and the working efficiency is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of welding, and in particular relates to a single-wire or double-wire welding gun switching device and method. Background Art

[0002] During the welding process, thick plate welding problems are usually encountered. Single-wire welding requires multiple filling passes, which will affect the welding efficiency. The emergence of double-wire welding is a good solution to this problem. Double-wire welding has the characteristics of high coverage rate and fast welding speed. It is suitable for medium and large current welding. However, the welding effect at low current is not as stable as single-wire welding, and the interference between arcs is large. In addition, the filling efficiency of double-wire welding is suitable for the welding of medium and thick plates.

[0003] At present, many joint forms require low-current welding for base laying, such as pipeline base welding, butt welding of thick plates with grooves, etc. The filling layer and the cover layer can be welded with a large current. It is not suitable to use double-wire welding for base laying. The double-wire has a large heat input, and it is easy to produce defects such as undercut and weld penetration during base laying. Therefore, using a single wire for welding during base laying has a good effect. However, double-wire welding is suitable for filling and covering due to its excellent welding efficiency. In this case, it is necessary to switch between double-wire welding and single-wire welding. Switching between single and double-wire requires complex steps such as replacing the wire feeder, disassembling the welding gun, and replacing the conductive nozzle. This wastes a lot of time and greatly reduces the welding work efficiency.

[0004] Therefore, it is urgent to design a single-wire double-wire welding gun switching device and method to solve the above-mentioned problem that switching between single and double wires requires complex steps such as replacing the wire feeder, disassembling the welding gun, and replacing the conductive nozzle, which wastes time and reduces welding work efficiency. Summary of the invention

[0005] In order to solve the technical problem mentioned in the background technology that switching between single and double wires requires complex steps such as replacing the wire feeder, disassembling the welding gun, replacing the conductive nozzle, etc., which wastes time and reduces welding work efficiency, a single-double wire welding gun switching device and method are provided to solve the above problems.

[0006] To achieve the above-mentioned purpose, the specific technical scheme of the single-wire double-wire welding gun switching device and method of the present invention is as follows: A single-wire and double-wire welding gun switching device comprises a support plate, the support plate is connected to a robot, a driving cylinder is arranged on the support plate, a first welding gun and a second welding gun are arranged in parallel on the support plate, the driving cylinder is connected to the first welding gun, the driving cylinder drives the first welding gun to rise and fall relative to the second welding gun to adjust the height of the first welding gun relative to the second welding gun, and realizes single-wire welding and double-wire welding of the weld.

[0007] Further, the driving cylinder drives the first welding gun to rise so that the height of the first welding gun is higher than that of the second welding gun, and the second welding gun performs single-wire base welding on the weld. The driving cylinder drives the first welding gun to descend so that the height of the first welding gun is the same as that of the second welding gun, and the first welding gun and the second welding gun jointly perform double-wire filling and covering on the weld.

[0008] Furthermore, it also includes a first connecting plate and a second connecting plate, one end of the first connecting plate is connected to the driving cylinder, the other end of the first connecting plate is connected to the first welding gun, one side of the second connecting plate is connected to the support plate, and the other side is connected to the second welding gun.

[0009] Furthermore, it also includes a first slider and a second slider, the first slider is provided with a sliding groove along the vertical direction, the second slider is provided with a mounting groove along the vertical direction, the first slider and the second slider are fixedly arranged on a side of the support plate close to the first welding gun and the second welding gun, the first connecting plate is slidably arranged in the sliding groove of the first slider, and the second connecting plate is fixedly arranged in the mounting groove of the second slider.

[0010] Furthermore, a slideway is provided on the support plate along the length direction of the support plate, and the first slider and the second slider are slidably provided on the slideway to adjust the distance between the first welding gun and the second welding gun.

[0011] Furthermore, it also includes a first angle adjustment component and a second angle adjustment component, the first angle adjustment component is arranged between the first connecting plate and the first welding gun to enable the first welding gun to rotate around the vertical direction of the first welding gun, and the second angle adjustment device is arranged between the second connecting plate and the second welding gun to enable the second welding gun to rotate around the vertical direction of the second welding gun.

[0012] Furthermore, the first angle adjustment assembly includes a first support, the first support is arranged on the first connecting plate, and the first welding gun is rotatably connected to the first support.

[0013] Furthermore, the first angle adjustment assembly also includes a first drive motor, which is arranged on the first support, and the driving end of the first drive motor is connected to the first gear. The first welding gun is fixedly provided with a second gear, and the first gear and the second gear are meshed.

[0014] Furthermore, the first connecting plate is an L-shaped connecting plate.

[0015] A single-wire and double-wire welding gun switching method comprises the following steps: S1. Before welding, grind the plate and scrub it with acetone to remove surface oil and rust; S2. Align the plates with a 2mm gap and assemble them using a welding clamping device; S3, the driving cylinder controls the first welding gun to rise, the robot moves the device to the welding position, and the second welding gun performs a single wire primer; S4, after the base is applied, the cylinder is driven to control the first welding gun to descend, and the first welding gun and the second welding gun perform double-wire filling and capping together; S5. Close the protective gas valve.

[0016] The single-wire double-wire welding gun switching device and method of the present invention have the following advantages: A first welding gun and a second welding gun are arranged in parallel on a support plate, a driving cylinder is connected to the first welding gun, and the driving cylinder drives the first welding gun to rise and fall relative to the second welding gun to adjust the height of the first welding gun relative to the second welding gun, thereby realizing single-wire welding and double-wire welding of the weld, and quickly realizing single-wire and double-wire switching by the driving cylinder, thereby saving time and improving work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The structure diagram of the single-wire and double-wire welding gun switching device of the present invention is shown in FIG. Figure 1 ; Figure 2 The structure diagram of the single-wire and double-wire welding gun switching device of the present invention is shown in FIG. Figure 2 ; Figure 3 It is a structural schematic diagram of single-wire welding of the present invention; Figure 4 It is a structural schematic diagram of double-wire welding of the present invention; Figure 5 It is a structural schematic diagram of double-wire drag welding of the present invention; Figure 6 It is a structural schematic diagram of double-wire push-type welding of the present invention; Figure 7 It is a schematic structural diagram of the double-wire unequal-length welding method of the present invention.

[0018] Description of the markings in the figure: 100. Support plate; 101. Slide; 1. Drive cylinder; 2. First welding gun; 3. Second welding gun; 4. First connecting plate; 5. Second connecting plate; 6. First slider; 7. Second slider; 8. First angle adjustment assembly; 81. First support; 82. First drive motor; 83. First gear; 84. Second gear; 9. Second angle adjustment assembly; 91. Second support; 92. Second drive motor; 93. Third gear; 94. Fourth gear. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0020] Those skilled in the art will appreciate that, although some embodiments herein include certain features included in other embodiments but not other features, the combination of features of different embodiments is meant to be within the scope of the present invention and form different embodiments. For example, in the claims, any one of the claimed embodiments may be used in any combination.

[0021] Please refer to the attached Figure 1 To Attachment Figure 7 The single-wire and double-wire welding gun switching device and method of the present invention are described.

[0022] like Figures 1 to 3 As shown, the single-wire and double-wire welding gun switching device in the present invention includes a support plate 100, the support plate 100 is connected to the robot, a driving cylinder 1 is arranged on the support plate 100, and a first welding gun 2 and a second welding gun 3 are also arranged in parallel on the support plate 100, the driving cylinder 1 is connected to the first welding gun 2, and the driving cylinder 1 drives the first welding gun 2 to rise and fall relative to the second welding gun 3 to adjust the height of the first welding gun 2 relative to the second welding gun 3, so as to realize single-wire welding and double-wire welding for the weld. In this embodiment, the thickness of the welded steel plate is 50mm, the welding gap is 2mm, the V-shaped groove, and the groove angle is 45°. The first welding gun 2 and the second welding gun 3 are both GMAW welding guns, the nozzle is made of brass, and the diameter of the welding wire is 1.2mm. The commonly used shielding gas in welding is a mixed shielding gas for protection, and the gas flow rate is usually 15L / min, which has a good protection effect. The first welding gun 2 and the second welding gun 3 are in the same vertical plane, and the welding wires of the first welding gun 2 and the second welding gun 3 are on the same horizontal straight line.

[0023] By arranging the first welding gun 2 and the second welding gun 3 in parallel on the support plate 100, the driving cylinder 1 is connected to the first welding gun 2, and the driving cylinder 1 drives the first welding gun 2 to rise and fall relative to the second welding gun 3 to adjust the height of the first welding gun 2 relative to the second welding gun 3, and realize single-wire welding and double-wire welding of the weld. The single-wire and double-wire switching can be quickly realized by the driving cylinder 1, which saves time and improves work efficiency.

[0024] Further, if Figures 1 to 3As shown, the driving cylinder 1 drives the first welding gun 2 to rise, so that the height of the first welding gun 2 is higher than the height of the second welding gun 3, and the second welding gun 3 performs single-wire bottom welding on the weld. The driving cylinder 1 drives the first welding gun 2 to descend, so that the height of the first welding gun 2 is the same as the height of the second welding gun 3, and the first welding gun 2 and the second welding gun 3 jointly perform double-wire filling and covering on the weld. Compared with the prior art, the single-wire and double-wire switching can be achieved without replacing the wire feeding mechanism and the welding gun, which greatly saves time and improves work efficiency. In this embodiment, the bottom welding current is 180A, the preferred voltage is 24V, and the preferred welding speed is 30cm / min. During the filling welding, the welding wire of the first welding gun 2 of the double wire is 300A, the welding wire of the second welding gun 3 is 280A, the voltage of the welding wire of the first welding gun 2 is 30V, the voltage of the welding wire of the second welding gun 3 is 28V, and the welding speed is 70cm / min. The parameters of the welding wire of the first welding gun 2 are greater than the parameters of the welding wire of the second welding gun 3, which can better turn out the coating of the upper layer and obtain better forming. The same parameters as the filling are used for capping welding, but for the consideration of weld formation, the welding speed is 100cm / min, which makes it have a good capping effect.

[0025] Further, if Figures 1 to 3 As shown, the single-wire and double-wire welding gun switching device in the present invention also includes a first connecting plate 4 and a second connecting plate 5, one end of the first connecting plate 4 is connected to the driving cylinder 1, the other end of the first connecting plate 4 is connected to the first welding gun 2, and the second connecting plate 5 is connected to the support plate 100 on one side and the second welding gun 3 on the other side. The first driving cylinder 1 drives the first connecting plate 4 to rise and fall, thereby making the first welding gun 2 rise and fall, so as to switch between single-wire and double-wire welding at any time. In this embodiment, the second welding gun 3 is fixed on the second connecting plate 5, and the second connecting plate 5 is fixed on the support plate 100, and the second welding gun 3 is immovable, and it is only necessary to adjust the lifting of the first welding gun 2 through the multi-driving cylinder 1. In other embodiments, the first welding gun 2 and the second welding gun 3 can be lifted and moved, as long as the switching between single-wire and double-wire can be achieved. In this embodiment, the first connecting plate 4 is an L-shaped connecting plate.

[0026] Further, if Figures 1 to 3As shown, in order to ensure that the first welding gun 2 is lifted and lowered only in the vertical direction during the lifting process without deviation, the second welding gun 3 can be firmly fixed on the second connecting plate 5, the single-wire and double-wire welding gun switching device in the present invention also includes a first slider 6 and a second slider 7, the first slider 6 is provided with a sliding groove in the vertical direction, the second slider 7 is provided with a mounting groove in the vertical direction, the first slider 6 and the second slider 7 are fixedly arranged on a side of the support plate 100 close to the first welding gun 2 and the second welding gun 3, the first connecting plate 4 is slidably arranged in the sliding groove of the first slider 6, and the second connecting plate 5 is fixedly arranged in the mounting groove of the second slider 7. The first connecting plate 4 can be limited in the vertical direction by the sliding groove, so that the first connecting plate 4 can only move in the vertical direction, and then the first welding gun 2 can only be lifted and lowered in the vertical direction, and the second connecting plate 5 can be firmly fixed in the mounting groove by the mounting groove, and then the second welding gun 3 is stably fixed on the second connecting plate 5.

[0027] Further, if Figures 1 to 3 As shown, a slideway 101 is provided on the support plate 100 along the length direction of the support plate 100, and the first slider 6 and the second slider 7 are slidably provided on the slideway 101 to adjust the distance between the first welding gun 2 and the second welding gun 3. By providing the slideway 101, the positions of the first slider 6 and the second slider on the support plate 100 can be adjusted, and then the distance between the first welding gun 2 and the second welding gun 3 can be adjusted, so as to achieve the adjustment of the distance between the double wires.

[0028] Further, if Figure 5 and Figure 6 As shown in the figure, during the welding process of the weld, a certain angle needs to be formed between the two welding wires and the weld to complete various forms of welding such as drag welding and push welding. Figure 1 and Figure 4 As shown, in the present application, the first welding gun 2 and the second welding gun 3 are both curved, so by rotating the first welding gun 2 and the second welding gun 3, the angle between the welding wire and the weld of the first welding gun 2 and the second welding gun 3 can be adjusted. The single-wire and double-wire welding gun switching device in the present invention also includes a first angle adjustment component 8 and a second angle adjustment component 9. The first angle adjustment component 8 is arranged between the first connecting plate 4 and the first welding gun 2 so that the first welding gun 2 rotates around the vertical direction of the first welding gun 2. The second angle adjustment device is arranged between the second connecting plate 5 and the second welding gun 3 so that the second welding gun 3 rotates around the vertical direction of the second welding gun 3. Through the first angle adjustment component 8 and the second angle adjustment component 9, the angle between the welding wire and the weld of the first welding gun 2 and the second welding gun 3 can be adjusted to achieve different forms of welding operations.

[0029] Specifically, Figure 1 and Figure 2As shown, the first angle adjustment assembly 8 includes a first support 81, the first support 81 is arranged on the first connecting plate 4, and the first welding gun 2 is rotatably connected to the first support 81. The first angle adjustment assembly 8 also includes a first drive motor 82, the first drive motor 82 is arranged on the first support 81, the driving end of the first drive motor 82 is connected to the first gear 83, and the first welding gun 2 is fixedly provided with a second gear 84, and the first gear 83 and the second gear 84 are meshed. In other embodiments, the rotation of the first welding gun 2 can also be driven by structures such as belts and sprockets, as long as the first welding gun 2 can be rotated in the vertical direction of the first welding gun 2 to facilitate the adjustment of the angle between the welding wire and the weld.

[0030] Further, if Figure 1 and Figure 2 As shown, the second angle adjustment assembly 9 includes a second support 91, which is arranged on the second connecting plate 5, and the second welding gun 3 is rotatably connected to the second support 91. The second angle adjustment assembly 9 also includes a second drive motor 92, which is arranged on the second support 91, and the driving end of the second drive motor 92 is connected to the third gear 93. A fourth gear 94 is fixedly arranged on the second welding gun 3, and the third gear 93 and the fourth gear 94 are meshed. In other embodiments, the rotation of the second welding gun 3 can also be driven by structures such as belts and sprockets, as long as the second welding gun 3 can be rotated in the vertical direction of the second welding gun 3 to facilitate the adjustment of the angle between the welding wire and the weld.

[0031] The present invention also discloses a single-wire and double-wire welding gun switching method, comprising the following steps: S1. Before welding, grind the plate and scrub it with acetone to remove surface oil and rust; S2. Align the plates with a 2mm gap and assemble them using a welding clamping device; S3, driving the cylinder 1 to control the first welding gun 2 to rise, the robot moves the device to the welding position, and the second welding gun 3 performs a single wire primer; By driving the cylinder 1 to rise and fall, the positions of the first welding gun 2 and the second welding gun 3 are changed, so that the welding wires of the first welding gun 2 and the second welding gun 3 are not in the same horizontal straight line, thereby achieving a single wire effect. After the adjustment is completed, the shielding gas is turned on, the process parameters are set, and the robot is used to drive the second welding gun 3 for welding. The parameters should not be too large during the base welding.

[0032] S4. After the base is applied, the cylinder 1 is driven to control the first welding gun 2 to descend, and the first welding gun 2 and the second welding gun 3 perform double-wire filling and capping together; the capping parameters should be welded at a faster speed to obtain better forming.

[0033] S5. Close the protective gas valve. The protective gas used is 18% carbon dioxide and 82% pure argon, and the gas flow rate used by the first welding gun 2 and the second welding gun 3 is 15L / min.

[0034] Single-wire and double-wire welding are performed using the first welding gun 2 and the second welding gun 3, and the parameters of the first welding gun 2 and the second welding gun 3 are independently controlled. The first welding gun 2 is driven to rise and fall by the driving cylinder 1, so that the first welding gun 2 and the second welding gun 3 can be effectively displaced, so that single-wire and double-wire switching can be realized in a portable manner on one device to meet various process requirements and obtain defect-free welding joints during welding. In addition, due to the presence of spatter in the welding process, a layer of anti-splash coating is applied on the surface of the single-wire and double-wire welding gun switching device, which can reduce damage when spatter particles fly to its surface and extend its service life.

[0035] Further, if Figure 7 As shown, in addition to being suitable for scenarios where single and double wire welding is required at the same time, it can also be used for double-wire pushing and dragging welding to keep the dry extension length of the double-wire welding gun consistent during welding, or be used for double-gun parallel welding to achieve inconsistent elongation of the double wires and improve melting efficiency.

[0036] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A single-wire and double-wire welding gun switching device, characterized in that: It includes a support plate, which is connected to the robot. A driving cylinder is arranged on the support plate. A first welding gun and a second welding gun are also arranged in parallel on the support plate. The driving cylinder is connected to the first welding gun. The driving cylinder drives the first welding gun to rise and fall relative to the second welding gun to adjust the height of the first welding gun relative to the second welding gun, so as to realize single-wire welding and double-wire welding of the weld.

2. The single-wire and double-wire welding gun switching device according to claim 1, characterized in that: The driving cylinder drives the first welding gun to rise, so that the height of the first welding gun is higher than that of the second welding gun, and the second welding gun performs single-wire base welding on the weld. The driving cylinder drives the first welding gun to descend, so that the height of the first welding gun is the same as that of the second welding gun, and the first welding gun and the second welding gun jointly perform double-wire filling and covering on the weld.

3. The single-wire and double-wire welding gun switching device according to claim 1, characterized in that: It also includes a first connecting plate and a second connecting plate, one end of the first connecting plate is connected to the driving cylinder, the other end of the first connecting plate is connected to the first welding gun, one side of the second connecting plate is connected to the support plate, and the other side is connected to the second welding gun.

4. The single-wire and double-wire welding gun switching device according to claim 3, characterized in that: It also includes a first slider and a second slider, the first slider is provided with a sliding groove along the vertical direction, the second slider is provided with a mounting groove along the vertical direction, the first slider and the second slider are fixedly arranged on a side of the support plate close to the first welding gun and the second welding gun, the first connecting plate is slidably arranged in the sliding groove of the first slider, and the second connecting plate is fixedly arranged in the mounting groove of the second slider.

5. The single-wire and double-wire welding gun switching device according to claim 4, characterized in that: A slideway is arranged on the support plate along the length direction of the support plate, and the first slider and the second slider are slidably arranged on the slideway to adjust the distance between the first welding gun and the second welding gun.

6. The single-wire and double-wire welding gun switching device according to claim 3, characterized in that: It also includes a first angle adjustment component and a second angle adjustment component. The first angle adjustment component is arranged between the first connecting plate and the first welding gun to enable the first welding gun to rotate around the vertical direction of the first welding gun. The second angle adjustment device is arranged between the second connecting plate and the second welding gun to enable the second welding gun to rotate around the vertical direction of the second welding gun.

7. The single-wire and double-wire welding gun switching device according to claim 6, characterized in that: The first angle adjustment assembly comprises a first support, the first support is arranged on the first connecting plate, and the first welding gun is rotatably connected to the first support.

8. The single-wire and double-wire welding gun switching device according to claim 7, characterized in that: The first angle adjustment assembly also includes a first drive motor, which is arranged on the first support. The driving end of the first drive motor is connected to the first gear. The first welding gun is fixedly provided with a second gear, and the first gear and the second gear are meshed.

9. The single-wire and double-wire welding gun switching device according to claim 3, characterized in that: The first connecting plate is an L-shaped connecting plate.

10. A method for switching between single-wire and double-wire welding guns, characterized in that: The steps include: S1. Before welding, grind the plate and scrub it with acetone to remove surface oil and rust; S2. Align the plates with a 2mm gap and assemble them using a welding clamping device; S3, the driving cylinder controls the first welding gun to rise, the robot moves the device to the welding position, and the second welding gun performs a single wire primer; S4, after the base is applied, the cylinder is driven to control the first welding gun to descend, and the first welding gun and the second welding gun perform double-wire filling and capping together; S5. Close the protective gas valve.

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