Welding device and welding robot with same

Abstract

The invention provides a welding device and a welding robot with the welding device, and the welding device comprises a welding body which is provided with a welding joint; the driving assembly is arranged in the welding body and is in driving connection with the welding joint, the driving assembly comprises a first connecting piece, the first connecting piece is rotatably arranged along a first track, and the first connecting piece is connected with the welding joint, so that the first connecting piece drives the welding joint to synchronously rotate; and the limiting component is arranged in the welding body, the limiting component and the driving assembly are arranged in the axis direction of the welding body in a spaced mode, the limiting component is attached to the welding connector, and the limiting component is elastically arranged so that the welding connector can rotate along a second track relative to the first connecting piece through the elastic force effect of the limiting component in the rotating process of the welding connector. The problem that in the prior art, a welding joint can only move integrally along with a welding device or rotate around the axis of the welding joint, large-range stirring cannot be conducted on a molten pool, and the welding quality is affected is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of welding robots, and in particular, to a welding device and a welding robot having the same. Background Art

[0002] Traditional welding techniques, especially tungsten inert gas welding (TIG), are widely used in the welding of various metals due to their ability to produce high-quality welds. However, a significant drawback of this welding method is that the weld seam is relatively narrow, especially when using a fixed tungsten needle. A narrow weld seam means that the area welded each time is small, and more welding passes are required to complete large-area or high-thickness welding tasks. This not only increases the welding time and cost but may also cause cumulative effects in the heat-affected zone due to multiple passes of welding, resulting in a decline in the physical properties of the welded area, such as an increase in hardness and a decrease in plasticity, ultimately affecting the overall quality of the welded part.

[0003] In addition, narrow weld seams may also cause stability problems during the welding process. When the welding current passes through a narrow weld seam, the control of the arc becomes more difficult and is easily deviated by external factors such as air currents, i.e., the so-called arc blow phenomenon. Arc blow directly affects the formation and penetration of the weld seam and may even lead to welding failure, thus having an adverse impact on welding quality and efficiency. Summary of the Invention

[0004] The main object of the present invention is to provide a welding device and a welding robot having the same, so as to solve the problem that the welding joint in the existing welding device can only move as a whole with the welding device or rotate around its own axis, and cannot stir the molten pool in a large range, resulting in a narrow weld seam, thereby affecting the welding quality.

[0005] To achieve the above object, according to one aspect of the present invention, a welding device is provided, including: a welding body, on which a welding joint is provided; a driving assembly, disposed in the welding body and drivingly connected to the welding joint, the driving assembly including a first connecting member, the first connecting member being rotatably disposed along a first trajectory, the first connecting member being connected to the welding joint so that the first connecting member drives the welding joint to rotate synchronously; a limiting member, disposed in the welding body and spaced apart from the driving assembly along the axis of the welding body, the limiting member being in contact with the welding joint, the limiting member being elastically disposed so that during the rotation of the welding joint, under the action of the elastic force of the limiting member, the welding joint is inclined relative to the axis of the welding body, so that the welding joint rotates along a second trajectory relative to the first connecting member.

[0006] Further, the limiting component includes: an elastic body disposed within the welding body. A through-hole is provided on the elastic body, and the welding joint is inserted through the through-hole. During the synchronous rotation of the welding joint and the first connecting member, the elastic body is squeezed, and a radial elastic force is applied to the welding joint through the elastic body, causing the welding joint to rotate along a second trajectory.

[0007] Further, the hole wall surface of the through-hole includes: a first wall surface and a second wall surface connected to each other. The first wall surface is a first arc surface, and the second wall surface is a plane. At least a part of the outer surface of the welding joint fits with the plane.

[0008] Further, the limiting component further includes: a deformation hole provided on the elastic body and located on the side of the through-hole. The deformation hole extends along the circumferential direction of the elastic body; there are multiple deformation holes, and at least a part of each deformation hole is spaced along the radial direction of the elastic body.

[0009] Further, a first step structure is provided on the welding body, and the first step structure has a first step end face. The welding device further includes: a locking component sleeved on the welding joint and spaced from the first step end face. The limiting component is disposed between the first step end face and the locking component to fix the limiting component through the locking component.

[0010] Further, the driving assembly further includes: a connecting bearing. The outer ring of the connecting bearing is connected to the first connecting member, and the inner ring of the connecting bearing is connected to the welding joint. The first connecting member drives the welding joint to rotate along a first trajectory through the connecting bearing, and the welding joint rotates relative to the first connecting member along a second trajectory through the inner ring of the connecting bearing.

[0011] Further, the driving assembly further includes: a second connecting member connected to the first connecting member. A first installation cavity is provided in the second connecting member, and at least a part of the inner wall surface of the first installation cavity is a second arc surface; a transition component is disposed in the first installation cavity, and at least a part of the outer surface of the transition component is a spherical surface. At least a part of the spherical surface fits with the second arc surface to cause the welding joint to rotate relative to the second connecting member along a second trajectory during the rotation of the first connecting member driving the welding joint.

[0012] Further, a cushion block is provided on the inner wall surface of the first installation cavity, and the second arc surface is provided on the cushion block. The cushion block is an annular structure, and the transition component is inserted through the cushion block; wherein, the cushion block can be elastically arranged; and / or, the transition component is in clearance fit with the cushion block.

[0013] Further, the transition component includes: a bearing seat disposed in the first installation cavity, and at least a part of the outer surface of the bearing seat is a spherical surface; a connecting bearing disposed in the bearing seat and connected to the bearing seat, and the welding joint is connected to the connecting bearing.

[0014] Further, the first connecting member is an eccentric member, and a second installation cavity is provided inside the first connecting member. At least a part of the second connecting member is inserted into the second installation cavity and connected to the first connecting member. A first positioning portion is provided on the first connecting member, and a second positioning portion is provided on the second connecting member. The first positioning portion and the second positioning portion are inserted into each other to connect the first connecting member and the second connecting member.

[0015] Further, there are multiple first positioning portions, and the multiple first positioning portions are arranged at intervals along the circumferential direction of the first connecting member. The second positioning portion can be selectively inserted into one of the multiple first positioning portions; and / or, the first positioning portion is a positioning protrusion, and the second positioning portion is a positioning groove.

[0016] Further, the driving assembly further includes a driving member. The first connecting member includes: a first connecting body connected to the welding joint; a second connecting body provided at an end of the first connecting body away from the welding joint, and the second connecting body is connected to the driving member. The second connecting body is eccentrically arranged relative to the first connecting body. Wherein, the first connecting body and the second connecting body are of an integral structure.

[0017] Further, a second installation cavity and a third connecting body are provided inside the first connecting body. The third connecting body is provided in the second installation cavity and extends along the axis direction of the first connecting body. The driving assembly further includes: a second connecting member, and at least a part of the second connecting member is inserted into the second installation cavity and connected to the third connecting body.

[0018] Further, the welding device further includes: a mounting shaft core inserted into the welding body, the welding joint is inserted into the mounting shaft core, and the first connecting member is connected to the mounting shaft core so that the first connecting member drives the welding joint to rotate through the mounting shaft core; a limiting member is sleeved on the mounting shaft core.

[0019] According to another aspect of the present invention, a welding robot is provided, including a body and welding devices. There are at least two welding devices, and the at least two welding devices are arranged on the body, and the welding devices are the above-mentioned welding devices.

[0020] Applying the technical solution of the present invention, according to the welding device provided by the present application, it includes a welding body, a driving component, and a limiting component. A welding joint is provided on the welding body; the driving component is arranged inside the welding body and is drivingly connected to the welding joint. The driving component includes a first connecting piece, and the first connecting piece is rotatably arranged along a first trajectory. The first connecting piece is connected to the welding joint so that the first connecting piece drives the welding joint to rotate synchronously; the limiting component is arranged inside the welding body and is spaced from the driving component along the axis of the welding body. The limiting component is in contact with the welding joint, and the limiting component can be elastically arranged so that during the rotation of the welding joint, under the action of the elastic force of the limiting component, the welding joint is inclined relative to the axis of the welding body, so that the welding joint rotates along a second trajectory relative to the first connecting piece. Such a setting changes the rotation trajectory of the welding joint through the cooperative design of the first connecting piece and the limiting component, enabling it to effectively stir the molten pool during the welding process. This unique stirring effect breaks the surface tension of the molten pool, promotes the uniform flow of the liquid metal in all directions, significantly increases the width of the weld, and forms a more plump and flat welding area. More importantly, the increased weld area promotes the refinement and uniform distribution of metal grains, significantly improves the physical properties of the welding area, such as strength, toughness, and fatigue resistance, thereby optimizing the overall quality and reliability of the welded part. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The specification drawings forming a part of the present application are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings:

[0022] Figure 1 shows a schematic structural diagram of an embodiment of the welding device according to the present invention;

[0023] Figure 2 shows a cross-sectional view of the welding device according to the present invention;

[0024] Figure 3 shows according to Figure 2 an enlarged view of part A;

[0025] Figure 4 shows according to Figure 2 an enlarged view of part B;

[0026] Figure 5 shows an assembly schematic diagram of the first connecting piece and the second connecting piece in the welding device according to the present invention;

[0027] Figure 6 shows a structural schematic diagram of the second connecting piece in the welding device according to the present invention;

[0028] Figure 7Shows a bottom view of the first connecting member in the welding device according to the present invention;

[0029] Figure 8 Shows a schematic structural view of the limiting member in the welding device according to the present invention;

[0030] Figure 9 Shows a schematic view of the rotation trajectory of the welding body in the welding device according to the present invention;

[0031] Figure 10 Shows a schematic structural view of the welding robot according to the present invention.

[0032] Among them, the above-mentioned drawings include the following reference numerals:

[0033] 100, welding body; 110, welding joint; 120, first step structure; 121, first step end face; 130, water cooling assembly; 140, second step structure;

[0034] 200, driving assembly; 210, first connecting member; 211, first positioning portion; 212, first connecting body; 213, second connecting body; 214, second installation cavity; 215, third connecting body; 216, scale mark; 220, connecting bearing; 230, second connecting member; 231, first installation cavity; 232, second positioning portion; 233, calibration mark; 234, fourth connecting body; 235, fifth connecting body; 240, transition member; 241, bearing seat; 250, driving member; 260, spacer; 270, gasket; 280, snap ring;

[0035] 300, limiting member; 310, elastic body; 311, through hole; 312, hole wall surface; 3120, first wall surface; 3121, second wall surface; 320, deformation hole; 321, first hole section; 322, second hole section; 323, third hole section;

[0036] 400, locking member; 410, first locking member; 420, second locking member; 500, installation shaft core; 510, cooling channel; 600, machine body; 700, welding device; 800, adjusting mechanism; 900, wire feeding nozzle. Detailed embodiments

[0037] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the drawings and in conjunction with the embodiments.

[0038] As mentioned in the background art, the molten pool formed by the welding device in the prior art during the welding process is relatively narrow, resulting in a narrow weld seam, and ultimately reducing the physical properties of the welding area and affecting the quality of the welded parts. Therefore, in view of the above technical problems, in the welding device provided in the present application, a first connecting member 210 and a limiting member 300 are provided. The first connecting member 210 is rotatably arranged along a first trajectory. The welding joint 110 is connected to the first connecting member 210, so that the welding joint 110 and the first connecting member 210 rotate synchronously. During this process, since the welding joint 110 is in contact with the limiting member 300, the welding joint 110 will extrude the limiting member 300. Under the elastic force of the limiting member 300, the rotation trajectory of the welding joint 110 changes, that is, it is rotatably arranged relative to the first connecting member 210 along a second trajectory. Since the limiting member 300 exerts a radial force on the welding joint 110, the welding joint 110 will tilt relative to the axis of the welding body 100. In this way, under the combined action of the first connecting member 210 and the limiting member 300, the rotation trajectory of the welding joint 110 changes, enabling the welding joint 110 to stir the molten pool formed by the liquid metal at the welding part, thereby breaking the surface tension of the molten pool and causing the liquid metal to flow around, thereby increasing the area of the weld seam and improving the quality of the welded parts.

[0039] Please refer to Figures 1 to 9 , the present application provides a welding device, including: a welding body 100, on which a welding joint 110 is provided; a driving assembly 200, arranged in the welding body 100 and drivingly connected to the welding joint 110. The driving assembly 200 includes a first connecting member 210, which is rotatably arranged along a first trajectory. The first connecting member 210 is connected to the welding joint 110 so that the first connecting member 210 drives the welding joint 110 to rotate synchronously; a limiting member 300, arranged in the welding body 100 and spaced from the driving assembly 200 along the axis of the welding body 100. The limiting member 300 is in contact with the welding joint 110, and the limiting member 300 is elastically arranged so that during the rotation of the welding joint 110, under the action of the elastic force of the limiting member 300, the welding joint 110 tilts relative to the axis of the welding body 100, so that the welding joint 110 rotates along a second trajectory relative to the first connecting member 210.

[0040] According to the welding device provided by the present application, it includes a welding body 100, a driving component 200, and a limiting component 300. A welding joint 110 is provided on the welding body 100; the driving component 200 is arranged inside the welding body 100 and is drivingly connected to the welding joint 110. The driving component 200 includes a first connecting piece 210, and the first connecting piece 210 is rotatably arranged along a first trajectory. The first connecting piece 210 is connected to the welding joint 110 so that the first connecting piece 210 drives the welding joint 110 to rotate synchronously; the limiting component 300 is arranged inside the welding body 100 and is arranged at an interval from the driving component 200 along the axis direction of the welding body 100. The limiting component 300 is in contact with the welding joint 110, and the limiting component 300 can be elastically arranged so that during the rotation of the welding joint 110, under the action of the elastic force of the limiting component 300, the welding joint 110 tilts relative to the axis of the welding body 100, so that the welding joint 110 rotates along a second trajectory relative to the first connecting piece 210. Such a setting changes the rotation trajectory of the welding joint 110 through the cooperative design of the first connecting piece 210 and the limiting component 300, enabling it to effectively stir the molten pool during the welding process. This unique stirring effect destroys the surface tension of the molten pool, promotes the uniform flow of the liquid metal in all directions, significantly increases the width of the weld seam, and forms a more plump and flat welding area. More importantly, the increased weld area promotes the refinement and uniform distribution of metal grains, significantly improves the physical properties of the welding area, such as strength, toughness, and fatigue resistance, thereby optimizing the overall quality and reliability of the welded parts.

[0041] Specifically, as Figure 8 shown, the limiting component 300 includes: an elastic body 310 arranged inside the welding body 100. A through hole 311 is provided on the elastic body 310, and the welding joint 110 is arranged through the through hole 311. During the synchronous rotation of the welding joint 110 and the first connecting piece 210, the elastic body 310 is extruded, and a radial elastic acting force is applied to the welding joint 110 through the elastic body 310, so that the welding joint 110 rotates along the second trajectory. The controllable radial force applied by the limiting component 300 to the welding joint 110 not only guides the change of the rotation trajectory of the welding joint but also plays a role in stable support, reducing vibration and deviation during the welding process. In addition, by adjusting the elasticity and position of the limiting component, the tilt angle and stirring intensity of the welding joint can be finely adjusted, enhancing the controllability of the welding process and ensuring the consistency and stability of the welding quality.

[0042] The through hole 311 on the elastic body 310 can ensure that the welding joint moves along the predetermined second track through precise squeezing during the rotation of the welding joint 110. This precise guiding effect effectively avoids the arc deviation that may occur during the welding process, ensures the stability and uniformity of the arc on the welding surface, thereby improving the density of the weld and the overall welding quality.

[0043] The stirring effect can play a significant role in the welding of various metal materials, especially for metals that are prone to form surface tension, such as aluminum alloys and stainless steel. By destroying the surface tension, the liquid metal can better wet the workpiece surface, forming a tighter metal-to-metal bond, and enhancing the adaptability of the welding device to different materials. At the same time, the evenly flowing liquid metal fills the weld gap, forming a smooth, pore-free and crack-free weld surface, significantly improving the aesthetics and surface quality of the weld.

[0044] The hole wall surface 312 passing through the hole 311 includes: a first wall surface 3120 and a second wall surface 3121 connected to each other, the first wall surface 3120 is a first arc surface, the second wall surface 3121 is a plane, and at least part of the outer surface of the welding joint 110 is in contact with the plane. Specifically, there is a gap between the welding joint 110 and the first arc surface, so that when the welding joint 110 rotates along the first trajectory, the welding joint 110 is limited by the plane, so that the welding joint 110 forms an irregular path of rotation.

[0045] The limiting component 300 also includes: a deformation hole 320, which is arranged on the elastic body 310 and is located on the side of the through hole 311, and the deformation hole 320 extends along the circumferential direction of the elastic body 310; there are multiple deformation holes 320, and at least part of each deformation hole 320 is arranged at intervals along the radial direction of the elastic body 310. The design of the deformation holes 320, especially the extension and staggered distribution along the circumferential direction on the elastic body 310, significantly enhances the deformation ability of the elastic body when subjected to pressure or external force. These deformation holes allow the elastic body to perform more flexible local deformation while ensuring structural integrity, so as to better adapt to the dynamic changes of the welding joint 110 during high-speed rotation and fine-tuning.

[0046] The elastic body 310 is provided with a plurality of deformation holes 320, which can reduce the amount of material used and reduce the weight compared to a solid structure without deformation holes, and also simplifies the manufacturing process and reduces the manufacturing cost. In addition, the provision of the deformation holes reduces the stress concentration of the elastic body during use, reduces the material requirements, and further saves costs.

[0047] Specifically, each deformation hole 320 includes a first hole segment 321, a second hole segment 322, and a third hole segment 323 that are sequentially connected. The first hole segment and the third hole segment 323 extend along the circumferential direction of the elastic body 310 respectively, and the second hole segment 322 extends along the radial direction of the elastic body 310. The first hole segment 321 and the third hole segment 323 in each deformation hole 320 extend along the circumferential direction, while the second hole segment 322 extends along the radial direction. This composite structure design enables the elastic body 310 to have good deformation ability both in the circumferential and radial directions. It can effectively disperse various stresses borne by the elastic body during operation, avoiding material fatigue or structural damage caused by excessive local stress. This means that the elastic body can not only provide support and elastic feedback for the circumferential fine-tuning of the welded joint, but also adapt to the dynamic changes of the welded joint in the radial direction, thereby providing more comprehensive positioning and guiding support in three-dimensional space, enhancing the stability and precision of welding.

[0048] Among them, the first hole segment 321 of one deformation hole 320 and the third hole segment 323 of another adjacent deformation hole 320 are arranged at intervals along the radial direction of the elastic body 310. The first hole segment 321 of each deformation hole 320 extends along an arc trajectory, and the arc trajectories of each first hole segment 321 are located on the same circumferential trajectory; the third hole segment 323 of each deformation hole 320 extends along an arc trajectory, and the arc trajectories of each third hole segment 323 are located on the same circumferential trajectory. With such a design of the deformation hole 320, especially the first hole segment 321 and the third hole segment 323, being arranged at intervals along the radial direction of the elastic body 310, and all extending along the arc trajectory, and these arc trajectories being located on the same circumferential trajectory, the swinging trajectory of the welded joint 110 during the welding process can be precisely controlled, ensuring that the elastic body 310 is evenly stressed when the welded joint 110 swings. In addition, this design ensures that the welded joint can swing stably and continuously along the pre-planned path during the stirring action.

[0049] During the specific implementation process, as Figure 3 shown, a first step structure 120 is provided on the welding body 100. The first step structure 120 has a first step end face 121. The welding device further includes: a locking component 400, sleeved on the welded joint 110 and arranged at an interval from the first step end face 121. The limiting component 300 is arranged between the first step end face 121 and the locking component 400 to fix the limiting component 300 through the locking component 400. The cooperation of the first step structure 120 provided on the welding body and the locking component 400 provides a stable clamping and fixing method for the limiting component 300. This design ensures the stable position of the limiting component during the welding process, avoiding the displacement of the limiting component caused by vibration or external force, thereby maintaining the precise movement trajectory of the welded joint and improving the welding quality and stability.

[0050] The use of the locking component 400 makes the installation and removal of the limiting component 300 easier and faster. When the limiting component needs to be maintained or replaced, the limiting component can be easily removed by simply loosening the locking component without disassembling the entire welding device, which greatly shortens the maintenance time and reduces the maintenance cost, and also facilitates daily inspection and debugging.

[0051] In specific implementation, a second step structure 140 is further provided in the welding body 100, and the side of the limiting component 300 away from the welding joint 110 is fitted with the second step end face of the second step structure 140, and the limiting component 300 is limited by the cooperation of the first step structure 120 and the second step structure 140, and then the limiting component 300 is fixed by the locking component 400. The introduction of the second step structure 140, together with the first step structure 120, provides a dual positioning reference for the limiting component 300. This double-step limiting design ensures that the limiting component can achieve extremely high positioning accuracy in both the axial and circumferential directions, thereby more accurately controlling the rotation trajectory and movement state of the welding joint 110, and improving the arc stability and weld quality consistency during the welding process.

[0052] The limiting component 300 is an annular structure, and the locking component 400 includes a first locking component 410 and a second locking component 420. The first locking component 410 is arranged corresponding to the first step structure 120. After the first locking component 410 is sleeved on the welding joint 110 and threadedly matched with the welding joint 110, the end of the limiting component 300 close to the center is fixed. The second locking component 420 is arranged corresponding to the second step structure 140. The second locking component 420 is inserted into the welding body 100 and threadedly connected with the welding body 100 to fix the end of the limiting component 300 close to the edge. There is a gap between the first locking component 410 and the second locking component 420, which provides a certain elastic deformation space for the limiting component 300. The limiting component 300 is designed as a ring structure and is fixed at one end close to the center and one end close to the edge by a first locking component 410 and a second locking component 420 respectively. This double fixing point design ensures the stability of the limiting component during the welding process and can maintain the stability of its position and function even under conditions of high-speed rotation and external force impact.

[0053] A certain interval is maintained between the first locking component 410 and the second locking component 420, providing necessary elastic deformation space for the limiting component 300. This design allows the limiting component to make slight elastic adjustments when subjected to the movement of the welding joint 110 or external force, thereby better adapting to dynamic changes in the welding process and improving the response speed and positioning accuracy of the device.

[0054] In an embodiment provided by the present application, the driving assembly 200 further includes: a connecting bearing 220. The outer ring of the connecting bearing 220 is connected to the first connecting member 210, and the inner ring of the connecting bearing 220 is connected to the welding joint 110. The first connecting member 210 drives the welding joint 110 to rotate along a first trajectory through the connecting bearing 220, and the welding joint 110 rotates relative to the first connecting member 210 along a second trajectory through the inner ring of the connecting bearing 220. The connecting bearing 220 not only supports the macroscopic rotation of the welding joint 110 along the first trajectory, but also allows the welding joint to make fine adjustments relative to the first connecting member along the second trajectory through the inner ring. This fine adjustment ability enables the welding joint to make immediate adjustments according to the specific conditions of the welding surface while rotating at high speed, improving the adaptability of the welding device to complex workpieces and welding conditions.

[0055] The high-precision rolling contact of the connecting bearing 220 generates less heat compared to traditional sliding contact, which helps to keep the temperatures of the welding joint and the connecting member within a controllable range during the welding process. Bearings usually contain lubricants, reducing heat accumulation, improving the cooling efficiency of the entire device, thereby extending the service life of the equipment and reducing operating costs.

[0056] In another embodiment provided by the present application, the driving assembly 200 further includes: a second connecting member 230, connected to the first connecting member 210. A first installation cavity 231 is provided inside the second connecting member 230, and at least part of the inner wall surface of the first installation cavity 231 is a second arc surface; a transition member 240, disposed inside the first installation cavity 231. At least part of the outer surface of the transition member 240 is a spherical surface, and at least part of the spherical surface fits with the second arc surface to enable the welding joint 110 to rotate relative to the second connecting member 230 along the second trajectory during the process of the first connecting member 210 driving the welding joint 110 to rotate. In this way, under the elastic force of the limiting member 300, when the welding joint 110 rotates along the second trajectory, the interaction force with the driving end of the welding joint 110 is avoided, resulting in the fracture of the welding joint 110. The spherical surface of the transition member 240 cooperates with the second arc surface to provide a rotation space for the welding joint 110 to rotate along the second trajectory.

[0057] Specifically, a transition component 240 is introduced, whose outer surface is a spherical surface, which fits with the second arc surface of the inner wall of the second connecting member 230, providing additional rotation space and freedom for the welding joint 110. This design allows the welding joint to rotate not only along the first track, but also to perform fine-tuning rotation along the second track under the elastic force of the limiting component 300, that is, to swing within a certain range in the direction perpendicular to the main axis. This swinging ability helps the welding joint to adapt to the irregular changes of the welding surface more flexibly, and improves the welding accuracy and efficiency. The fit between the spherical surface of the transition component 240 and the second arc surface ensures that when the welding joint 110 rotates along the second track, there will be no direct and large force contact between its driving end and the second connecting member 230. This greatly reduces the local stress borne by the welding joint during high-speed rotation and stirring, avoids the fracture or other damage of the welding joint caused by stress concentration, significantly improves the bearing capacity and durability of the welding joint, and extends the service life of the equipment.

[0058] The formation of the second trajectory is due to the precise matching of the transition component 240 and the second connecting component 230. This design ensures the stability and control accuracy of the weld joint during high-speed rotation and stirring, and can maintain stable contact and uniform stirring of the weld joint even when there are slight unevenness on the surface of the welded workpiece, avoiding jitter and deviation during welding, and improving welding quality and production efficiency.

[0059] Further, a pad 260 is provided on the inner wall surface of the first installation cavity 231, and the second arc surface is provided on the pad 260. The pad 260 is an annular structure, and the transition component 240 is inserted into the pad 260; wherein the pad 260 can be elastically provided; and / or, the transition component 240 and the pad 260 are clearance-matched. The pad 260 with an annular structure is provided on the inner wall surface of the first installation cavity 231, and the second arc surface thereon can form a more fitting contact with the outer surface of the welding joint 110. The elastic setting of the pad allows it to be fine-tuned when subjected to force to compensate for any installation error or component deformation, thereby ensuring a tight connection between the transition component 240 and the welding joint 110 under high-speed rotation.

[0060] The second arc surface of the pad 260 fits the outer surface of the weld joint and can be regarded as a dynamic guide surface of the weld joint during high-speed rotation. This design helps to maintain the accuracy of the rotation center of the weld joint, reduces the risk of arc deviation, and improves the positioning accuracy of the arc on the workpiece.

[0061] In specific implementation, the transition component 240 includes: a bearing seat 241 disposed in the first installation cavity 231, at least a part of the outer surface of the bearing seat 241 being a spherical surface; a connecting bearing 220 disposed in the bearing seat 241 and connected to the bearing seat 241, and the welding joint 110 being connected to the connecting bearing 220. The bearing seat 241 in the transition component 240 is designed such that at least a part of its outer surface is a spherical surface. This structure allows the welding joint 110 to be finely adjusted in multiple axial directions, improving the adaptability and flexibility of the welding device. The use of the connecting bearing 220 ensures a low-friction connection between the welding joint 110 and the bearing seat 241, especially in the high-speed rotation state. The precise structure of the bearing reduces the direct contact between moving parts, lowers the friction coefficient, effectively prevents excessive wear caused by long-term high-speed operation, and extends the service life of the welding joint 110.

[0062] In specific implementation, the first connecting member 210 is an eccentric member. A second installation cavity 214 is provided inside the first connecting member 210, and at least a part of the second connecting member 230 is inserted into the second installation cavity 214 and connected to the first connecting member 210. A first positioning portion 211 is provided on the first connecting member 210, and a second positioning portion 232 is provided on the second connecting member 230. The first positioning portion 211 and the second positioning portion 232 are inserted into each other to connect the first connecting member 210 and the second connecting member 230. As an eccentric member, the first connecting member 210 is provided with a second installation cavity 214 inside to accommodate a part of the structure of the second connecting member 230. This eccentric design can precisely control the eccentric distance of the welding joint relative to the main shaft, thereby adjusting the rotation radius of the arc and the welding trajectory. Through the insertion design of the first positioning portion and the second positioning portion, the operator can easily adjust the relative position between the first connecting member and the second connecting member to achieve rapid fine adjustment and precise positioning.

[0063] In addition, since the first connecting member 210 is an eccentric member, driven by the first connecting member 210, the first trajectory of the welding joint 110 is a circular trajectory rotating around a predetermined axis rather than self-rotation. Under the elastic force of the limiting member 300, the welding joint 110 is inclined relative to the axis of the welding body 100, causing the welding end of the welding joint 110 to rotate along a second trajectory, so that the welding joint 110 forms a swing similar to a frustum trajectory with the part cooperating with the limiting member 300 as the positioning point, stirring the molten pool, promoting the uniform distribution and flow of the liquid metal, significantly improving the width, flatness, and density of the weld, and thus comprehensively enhancing the welding quality.

[0064] The formation of the composite motion trajectory allows the welding joint to cover a larger welding area while stirring the molten pool, significantly accelerating the welding speed, reducing the welding time required for a single weld, and thus improving production efficiency and capacity. This design is particularly suitable for high-speed and efficient welding operations in large-scale production environments, and can greatly shorten the cycle time of the entire welding production line.

[0065] Furthermore, there are multiple first positioning portions 211, and the multiple first positioning portions 211 are arranged at intervals along the circumferential direction of the first connecting member 210. The second positioning portion 232 can be selectively inserted into one of the multiple first positioning portions 211; and / or, the first positioning portion 211 is a positioning protrusion, and the second positioning portion 232 is a positioning groove. The design of the multiple first positioning portions 211 can provide multiple options for the adjustment of the eccentricity. The operator can flexibly adjust the rotation trajectory and stirring intensity of the welding joint 110 according to different welding requirements, such as the workpiece material, thickness, or welding speed. The design that the first positioning portion 211 is a positioning protrusion and the second positioning portion 232 is a positioning groove adopts a mechanical insertion method, which not only simplifies the process of adjusting the eccentricity without the need for complex tools or professional skills, but also makes the maintenance and adjustment of the equipment more convenient. The operator can quickly fine-tune the eccentricity to adapt to different welding scenarios. The precise adjustment of the eccentricity, combined with the composite motion of the welding joint along the second trajectory, can more evenly distribute heat and arc energy, reducing the generation of welding defects such as pores, slag inclusions, and cracks. At the same time, the improved stirring mode helps to form a smooth and seamless weld surface, significantly enhancing the appearance beauty of the weld.

[0066] The driving assembly 200 further includes a driving member 250. The first connecting member 210 includes: a first connecting body 212, and the first connecting body 212 is connected to the welding joint 110; a second connecting body 213, which is arranged at one end of the first connecting body 212 away from the welding joint 110, and the second connecting body 213 is connected to the driving member 250. The second connecting body 213 is eccentrically arranged relative to the first connecting body 212; wherein, the first connecting body 212 and the second connecting body 213 are an integral structure. Preferably, the driving member 250 is a driving motor. By the second connecting body 213 being eccentrically arranged relative to the first connecting body 212, the first connecting member 210 forms an eccentric structure, thereby driving the first body of the welding joint 110 to rotate around a predetermined axis.

[0067] A second installation cavity 214 and a third connection body 215 are provided inside the first connection body 212. The third connection body 215 is disposed inside the second installation cavity 214 and extends along the axial direction of the first connection body 212. The driving assembly 200 further includes: a second connecting member 230, at least a part of the second connecting member 230 is disposed inside the second installation cavity 214 and is connected to the third connection body 215. By providing the second installation cavity 214 inside the first connection body 212 and the third connection body 215 extending along the axial direction, the effective utilization of the internal space of the driving assembly is realized. This multi-level nested structure design not only reduces the overall volume of the driving assembly, making the welding device more compact, but also a part of the second connecting member 230 is disposed inside the second installation cavity 214 and is connected to the third connection body 215, forming a direct and stable torque transmission path. This design reduces the energy loss during torque transmission, improves the efficiency and accuracy of torque transmission, ensures the stability and response speed of the welding joint during the execution of complex trajectory welding tasks, and improves the welding quality and production efficiency.

[0068] Further, the second connecting member 230 includes a fourth connection body 234 and a fifth connection body 235 connected to each other. The outer diameter of the fourth connection body 234 is smaller than the outer diameter of the fifth connection body 235. The first installation cavity 231 is a cavity penetrating through the fourth connection body 234 and the fifth connection body 235. The fourth connection body 234 is disposed inside the second installation cavity 214. The second positioning portion 232 is provided on the fourth connection body 234. The spacer 260 is disposed inside the fifth connection body 235. Such a setting facilitates the cooperation of the alignment mark 233 with each scale mark 216, which is convenient for the operator to directly observe. The spacer 260 is disposed inside the fifth connection body 235, so that when the spacer 260 cooperates with the welding joint 110 through the transition member 240, interference with the third connection body 215 is avoided, and at the same time, a moving space is provided for the welding joint 110 to rotate along the second trajectory.

[0069] Specifically, the third connection body 215 is locked with the drive shaft of the driving member 250 by a positioning pin or a screw. A third step structure is further provided on the inner wall surface of the first installation cavity 231. A gasket 270 is further provided between the third connection body 215 and the inner wall surface of the first installation cavity 231. A snap ring 280 is further provided on the third connection body 215. The snap ring 280 is snap-fitted on the third connection body 215 and is respectively in contact with the gasket 270 and the step end surface of the third step structure to connect the second connecting member 230 with the first connecting member 210. The snap ring 280 is in contact with the step end surface of the third step structure, ensuring the precise alignment of the second connecting member in the first installation cavity and simplifying the assembly process. Through the buffering effect of the gasket 270 and the snap ring 280, the vibration and noise generated during the welding process can be absorbed, reducing the overall noise level and vibration amplitude of the equipment.

[0070] Among them, Figures 5 to 7 As shown, a plurality of scale marks 216 are provided on the first connection body 212, and a calibration mark 233 is provided on the fifth connection body 235. Each scale mark 216 is provided in one-to-one correspondence with the plurality of first positioning portions 211. During use, by adjusting the relative position of the second connection member 230 and the first connection member 210, the positioning groove on the second connection member 230 is matched with one of the plurality of positioning protrusions. At this time, the scale marks 216 aligned with the calibration mark 233 are used to reflect the eccentric angle of the second connection member 230 relative to the first connection member 210, thereby adjusting the rotation range of the welding joint 110. The plurality of scale marks 216 on the first connection body 212 cooperate with the calibration mark 233 on the fifth connection body 235, allowing the user to accurately adjust the relative position between the second connection member 230 and the first connection member 210, thereby achieving fine control of the eccentric angle of the welding joint 110. This design provides intuitive visual feedback, ensuring that users can accurately set the rotation range of the welding joint to adapt to different welding requirements and workpiece sizes, improving the flexibility and applicability of welding.

[0071] By observing the alignment of the scale marks and the calibration mark, the operator can quickly determine the eccentricity angle of the weld joint without the need for additional measuring tools, simplifying the initial setup and subsequent adjustment process of the equipment.

[0072] In the present application, the welding device further includes: an installation shaft core 500, which is inserted into the welding body 100, and the welding joint 110 is inserted into the installation shaft core 500. The first connecting member 210 is connected to the installation shaft core 500, so that the first connecting member 210 drives the welding joint 110 to rotate through the installation shaft core 500; and the limiting component 300 is sleeved on the installation shaft core 500. The installation shaft core 500 serves as an intermediate transmission link, effectively transmitting the rotational power received by the first connecting member 210 to the welding joint 110, ensuring the power stability under high-speed rotation and the precise control of the welding joint.

[0073] Among them, a cooling channel 510 is also provided in the mounting shaft core 500, and a water cooling assembly 130 is provided at the top of the welding body 100, and the water cooling assembly 130 is connected to the cooling channel 510, so as to cool the welding joint 110. The provision of the cooling channel 510 and the connection with the water cooling assembly 130 provide effective cooling for the welding joint 110 in a high-speed rotating and high-temperature environment. The coolant circulates through the cooling channel and can directly contact the welding joint, taking away the heat generated during the welding process, preventing the welding joint from being deformed or damaged due to overheating, and extending the service life of the welding joint and the overall welding device.

[0074] like Figure 10As shown in the figure, the present application also provides a welding robot, which includes a body 600 and at least two welding devices 700. The at least two welding devices 700 are arranged on the body, and the welding device 700 is the welding device 700 in the above embodiment. By arranging at least two welding devices 700 on a welding robot body 600, welding tasks can be executed simultaneously or alternately, realizing parallel or pipeline operation in the welding process. This design greatly improves the welding efficiency, shortens the completion time of a single welding task, increases the welding production capacity per unit time, and has significant advantages for welding operations in large-scale production environments.

[0075] Among them, the welding robot further includes an adjusting mechanism 800 and a wire feeding nozzle 900. The adjusting mechanism 800 and the wire feeding nozzle 900 are respectively arranged on the sides of each welding device 700. The adjusting mechanism 800 is connected to the wire feeding nozzle 900 and is used to adjust the position and angle of the wire feeding nozzle 900. The wire feeding nozzle 900 is used to cooperate with the welding device 700 to convey the welding wire to the weld and contact the first welding joint. Then, the first welding joint melts the welding wire. After that, the second welding joint in another welding device rotates to stir the molten pool formed after the welding wire is melted, breaking the surface tension of the liquid metal, thereby increasing the weld area.

[0076] The combined use of the adjusting mechanism 800 and the wire feeding nozzle 900 ensures the stable conveyance and precise melting of the welding wire, thereby achieving a high-quality welding effect. Especially in the case of using a double welding joint, one welding joint first melts the welding wire, and then the other welding joint rotates to stir the molten pool, breaking the surface tension of the liquid metal, making the weld more flat and smooth, increasing the weld area, and improving the welding quality and appearance aesthetics.

[0077] Each welding device is equipped with an independent cooling system, which can effectively remove the heat generated during the welding process, keep each component within an appropriate working temperature range, extend the service life of the equipment, reduce the failures caused by overheating, and ensure the continuity and stability of the welding operation.

[0078] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:

[0079] 1. Solve the problem that in the traditional tungsten inert gas welding gun during the welding process, due to the fixed tungsten needle, the welding speed and coverage are limited, resulting in low welding efficiency.

[0080] 2. Solve the problems that in the traditional welding gun during the welding process, the arc stability is insufficient, the arc is prone to deflection and instability, resulting in welding quality fluctuations, and the high heat and difficulty in temperature control brought by high-speed rotation may cause the tungsten needle to overheat and affect the service life of the welding gun.

[0081] 3. Improve welding efficiency: The high-speed rotating tungsten electrode expands the coverage of the arc, significantly increases the welding speed, reduces the welding time, and improves the production efficiency.

[0082] 4. Improve welding quality: The rotating arc distributes heat evenly, reduces welding defects such as pores and slag inclusions, and improves the density and strength of the weld.

[0083] 5. Efficient cooling: The water-cooled outer shell and the mounting shaft core 500 with a cooling flow channel form a water circulation cavity to cool the welding torch, improve the use efficiency, and increase the service life of the welding torch.

[0084] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A welding device, characterized in that, Including: A welding body (100) with a welding joint (110) provided thereon; A driving assembly (200) disposed within the welding body (100) and drivingly connected to the welding joint (110). The driving assembly (200) includes a first connecting member (210) rotatably disposed along a first trajectory. The first connecting member (210) is connected to the welding joint (110) so that the first connecting member (210) drives the welding joint (110) to rotate synchronously; A limiting member (300) disposed within the welding body (100) and spaced apart from the driving assembly (200) along the axial direction of the welding body (100). The limiting member (300) is in contact with the welding joint (110). The limiting member (300) is elastically disposed so that during the rotation of the welding joint (110), due to the elastic force of the limiting member (300), the welding joint (110) is inclined relative to the axis of the welding body (100), causing the welding joint (110) to rotate along a second trajectory relative to the first connecting member (210).

2. The welding device according to claim 1, characterized in that, The limiting member (300) includes: An elastic body (310) disposed within the welding body (100). A through hole (311) is provided on the elastic body (310). The welding joint (110) is inserted through the through hole (311) so that during the synchronous rotation of the welding joint (110) and the first connecting member (210), the elastic body (310) is squeezed, and a radial elastic acting force is applied to the welding joint (110) by the elastic body (310), causing the welding joint (110) to rotate along the second trajectory.

3. The welding device according to claim 2, characterized in that, The hole wall surface (312) of the through hole (311) includes: A first wall surface (3120) and a second wall surface (3121) connected to each other. The first wall surface (3120) is a first arc surface, and the second wall surface (3121) is a plane. At least a part of the outer surface of the welding joint (110) is in contact with the plane.

4. The welding device according to claim 2, characterized in that, The limiting member (300) further includes: A deformation hole (320) provided on the elastic body (310) and located on the side of the through hole (311). The deformation hole (320) extends along the circumferential direction of the elastic body (310); There are multiple deformation holes (320), and at least a part of each deformation hole (320) is spaced apart along the radial direction of the elastic body (310).

5. The welding device according to claim 1, wherein A first step structure (120) is provided on the welding body (100), and the first step structure (120) has a first step end face (121). The welding device further includes: The locking component (400) is sleeved on the welding joint (110) and is spaced from the first stepped end face (121). The limiting component (300) is arranged between the first stepped end face (121) and the locking component (400) to fix the limiting component (300) through the locking component (400).

6. The welding device according to claim 1, characterized in that, The driving assembly (200) further includes: A connecting bearing (220), the outer ring of the connecting bearing (220) is connected to the first connecting piece (210), the inner ring of the connecting bearing (220) is connected to the welding joint (110), the first connecting piece (210) drives the welding joint (110) to rotate along a first trajectory through the connecting bearing (220), and the welding joint (110) rotates relative to the first connecting piece (210) along a second trajectory through the inner ring of the connecting bearing (220).

7. The welding device according to claim 1, characterized in that, The driving assembly (200) further includes: A second connecting piece (230), connected to the first connecting piece (210), a first installation cavity (231) is arranged inside the second connecting piece (230), and at least part of the inner wall surface of the first installation cavity (231) is a second arc surface; A transition component (240), arranged inside the first installation cavity (231), at least part of the outer surface of the transition component (240) is a spherical surface, and at least part of the spherical surface is attached to the second arc surface, so that during the rotation of the first connecting piece (210) driving the welding joint (110), the welding joint (110) rotates relative to the second connecting piece (230) along a second trajectory.

8. The welding device according to claim 7, characterized in that, A cushion block (260) is arranged on the inner wall surface of the first installation cavity (231), the second arc surface is arranged on the cushion block (260), the cushion block (260) is of an annular structure, and the transition component (240) is arranged inside the cushion block (260); Wherein, the cushion block (260) can be elastically arranged; and / or, the transition component (240) is in clearance fit with the cushion block (260).

9. The welding device according to claim 7, characterized in that, The transition component (240) includes: A bearing seat (241), arranged inside the first installation cavity (231), at least part of the outer surface of the bearing seat (241) is a spherical surface; A connecting bearing (220), arranged inside the bearing seat (241) and connected to the bearing seat (241), and the welding joint (110) is connected to the connecting bearing (220).

10. The welding device according to claim 7, characterized in that, The first connecting piece (210) is an eccentric part, a second installation cavity (214) is arranged inside the first connecting piece (210), and at least part of the second connecting piece (230) is arranged inside the second installation cavity (214) and connected to the first connecting piece (210); A first positioning portion (211) is provided on the first connecting member (210), and a second positioning portion (232) is provided on the second connecting member (230). The first positioning portion (211) and the second positioning portion (232) are inserted into each other to connect the first connecting member (210) and the second connecting member (230).

11. The welding device according to claim 10, characterized in that, There are a plurality of the first positioning portions (211), and the plurality of first positioning portions (211) are arranged at intervals in the circumferential direction of the first connecting member (210). The second positioning portion (232) is selectively inserted into one of the plurality of first positioning portions (211); and / or The first positioning portion (211) is a positioning protrusion, and the second positioning portion (232) is a positioning groove.

12. The welding device according to claim 1, characterized in that, The driving assembly (200) further includes a driving member (250), and the first connecting member (210) includes: A first connecting body (212) that is connected to the welding joint (110); A second connecting body (213) is provided at one end of the first connecting body (212) away from the welding joint (110). The second connecting body (213) is connected to the driving member (250), and the second connecting body (213) is eccentrically arranged with respect to the first connecting body (212); Wherein, the first connecting body (212) and the second connecting body (213) are of an integral structure.

13. The welding device according to claim 12, characterized in that, A second installation cavity (214) and a third connecting body (215) are provided in the first connecting body (212). The third connecting body (215) is provided in the second installation cavity (214) and extends along the axis direction of the first connecting body (212). The driving assembly (200) further includes: A second connecting member (230), at least a part of the second connecting member (230) is inserted into the second installation cavity (214) and is connected to the third connecting body (215).

14. The welding device according to claim 1, characterized in that, The welding device further includes: An installation shaft core (500) is inserted into the welding body (100). The welding joint (110) is inserted into the installation shaft core (500). The first connecting member (210) is connected to the installation shaft core (500) so that the first connecting member (210) drives the welding joint (110) to rotate through the installation shaft core (500); The limiting member (300) is sleeved on the installation shaft core (500).

15. A welding robot, comprising a body (600) and a welding device (700), characterized in that, There are at least two welding devices (700), and at least two welding devices (700) are provided on the machine body. The welding device (700) is the welding device (700) according to any one of claims 1 to 14.

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