Dynamic self-shielding welding gun, self-anti-splashing welding assembly and anti-splashing welding method

Abstract

The invention relates to a dynamic self-shielding welding gun, a self-anti-splashing welding assembly and an anti-splashing welding method, the self-anti-splashing welding assembly comprises a base, a mechanical arm, an autorotation workbench, an electric cabinet, a clamp, an automobile control arm and the dynamic self-shielding welding gun, the base is horizontally arranged, and the mechanical arm, the autorotation workbench and the electric cabinet are arranged on the base; the electric control box is electrically connected with the mechanical arm and the autorotation workbench, the mechanical arm is provided with a dynamic self-shielding welding gun, the dynamic self-shielding welding gun comprises a dynamic variable-amplitude cover body which is composed of a U-shaped cover plate and an arc cover plate in an enclosure piece and can automatically stretch out and draw back to half wrap a welding gun body, and the workbench is driven by a belt driving assembly to be capable of overturning. The welding gun body and the mechanical arm are driven to rotate through gear meshing, the enclosing piece and the welding gun body move in a follow-up mode, the industrial camera can shoot images for monitoring the welding seam quality in real time, and the anti-splashing device and the self-anti-splashing welding assembly achieve three-automation of self-adaption as needed, rapid self-emergency and overall or local self-deformation.

Description

Technical Field

[0001] The present invention relates to the field of welding machinery, and particularly to a dynamic self-shielding welding torch, a self-spatter-proof welding assembly, and a spatter-proof welding method. Background Art

[0002] In modern manufacturing, welding is one of the indispensable important processing means. People's research on welding processes and supporting equipment has become increasingly in-depth, and the technology has been continuously improved. However, during the welding operation process, spatter is a common and inevitable problem. Welding spatter not only poses a threat to the safety of welding operators, such as scalding the skin of operators and splashing into the eyes, but also may damage surrounding equipment, tools, and reduce the quality of the working environment, affecting the cleanliness and safety of the workplace. Importantly, the spattered welding slag spreads over a large area on the surface of the welded workpiece, forming slag residues, increasing subsequent cleaning processes, reducing welding efficiency, and increasing production costs. In addition, welding spatter also reduces welding quality. For example, it affects the appearance formation of the weld seam, forming pits, pores and other defects on the surface of the weld seam, reducing the strength and reliability of the welding. At present, methods for preventing welding spatter, such as applying anti-spatter agents and setting simple protective baffles, have problems such as poor effect, cumbersome operation, and frequent maintenance. For automotive control arms with diverse shapes, the weld bead paths are diverse, the welding operation directions are multi-directional, and the welding slag generated during the welding process cannot be effectively controlled in a standardized manner. There is no unified treatment measure that can be adaptively adjusted according to the dynamic welding operation direction, resulting in random multi-directional spatter of welding slag and affecting the welding quality of automotive control arms. Especially for the operation of high-precision automotive arms, there is no high-precision protection measure, resulting in uncontrollable spatter direction and non-standardized and unified welding quality. In addition, the influence of arc light during welding makes it inconvenient to observe the weld quality. If the observation is not timely and there are omissions, there is a problem of difficult traceability. Summary of the Invention

[0003] To overcome the defects of the prior art, a dynamic self-shielding welding torch, a self-spatter-proof welding assembly, and a spatter-proof welding method that are adaptively adjusted as needed, quickly self-emergency, and self-deform as a whole or locally are designed. They can cooperate with the welding torch body and the weld bead path to achieve the effect of dynamically preventing welding slag spatter in all directions, have corresponding adaptation and adjustment effects for automotive arms of different shapes, are conducive to standardizing and unifying welding quality, and realizing a high-precision welding process.

[0004] A dynamic self-shielding welding torch, comprising an external gear ring sleeve, a welding torch body and an enclosing member. The external gear ring sleeve is sleeved on the welding torch body, and the enclosing member is arranged on the external gear ring sleeve. The enclosing member includes a U-shaped cover plate, an internal gear ring sleeve and two arc-shaped cover plates. The internal gear ring sleeve is coaxially sleeved outside the external gear ring sleeve, and the inner wall of the internal gear ring sleeve meshes with the outer wall of the external gear ring sleeve. The U-shaped cover plate is sleeved at the gun head of the welding torch body, and the two arc-shaped cover plates are respectively arranged on both sides of the U-shaped cover plate. The inner walls of the U-shaped cover plate and the two arc-shaped cover plates enclose a dynamic amplitude-changing cover body that cooperates with the welding torch body. The bottom of the U-shaped cover plate is connected to the internal gear ring sleeve, and the bottom of each arc-shaped cover plate is connected to the internal gear ring sleeve.

[0005] As a preferred solution: The edge gap between each side of the U-shaped cover plate and an adjacent arc-shaped cover plate is provided.

[0006] As a preferred solution: The enclosing member further includes a sliding guide post, an elastic damper, a sliding guide post sleeve and a rubber ring. The sliding guide post is fixedly connected to the U-shaped cover plate and / or the arc-shaped cover plate. The sliding guide post sleeve is fixedly connected to the internal gear ring sleeve. The sliding guide post is telescopically slidably connected in the sliding guide post sleeve, and an elastic damper is arranged between the sliding guide post and the sliding guide post sleeve.

[0007] As a preferred solution: Rubber rings are arranged at the front edge of the U-shaped cover plate and the outer circumference of the arc-shaped cover plate, and the rubber rings are high-temperature resistant rubber rings.

[0008] A self-preventing splash welding assembly is composed of the above-mentioned dynamic self-shielding welding torch, and includes a base, a robotic arm, a rotating workbench, an electric control box, a fixture, an automotive control arm and a dynamic self-shielding welding torch. The base is horizontally arranged, the robotic arm and the rotating workbench are arranged side by side on the base, the electric control box is arranged on the base, the electric control box is electrically connected to the robotic arm and the rotating workbench respectively. The dynamic self-shielding welding torch is arranged on the robotic arm, the automotive control arm is arranged on the rotating workbench, and the automotive control arm is detachably connected to the rotating workbench through the fixture;

[0009] The dynamic self-shielding welding torch includes an external gear ring sleeve, a welding torch body and an enclosing member. The external gear ring sleeve is sleeved on the welding torch body, and the enclosing member is arranged on the external gear ring sleeve. The enclosing member includes a U-shaped cover plate, an internal gear ring sleeve and two arc-shaped cover plates. The internal gear ring sleeve is coaxially sleeved outside the external gear ring sleeve, and the inner wall of the internal gear ring sleeve meshes with the outer wall of the external gear ring sleeve. The U-shaped cover plate is sleeved at the gun head of the welding torch body, and the two arc-shaped cover plates are respectively arranged on both sides of the U-shaped cover plate. The inner walls of the U-shaped cover plate and the two arc-shaped cover plates enclose a dynamic amplitude-changing cover body that cooperates with the welding torch body. The bottom of the U-shaped cover plate is connected to the internal gear ring sleeve, and the bottom of each arc-shaped cover plate is connected to the internal gear ring sleeve.

[0010] As a preferred solution: The rotating workbench includes a central plate, a belt drive assembly, two vertical support plates, and two rotating shafts. The two vertical support plates are vertically arranged side by side on the base. The central plate is arranged between the two vertical support plates. The vertical support plates and the rotating shafts are arranged in one-to-one correspondence. One rotating shaft is arranged at each end of the central plate. One end of each rotating shaft is connected to the central plate. The fixture is arranged on the side wall of the central plate. The other end of each rotating shaft is hinged to its corresponding vertical support plate. The belt drive assembly is arranged on the outer wall of any one of the two vertical support plates. The belt drive assembly is connected to one of the rotating shafts close to it. The central plate makes a circumferential flipping movement between the two vertical support plates driven by the belt drive assembly.

[0011] As a preferred solution: It further includes a light source and an industrial camera. The light source and the industrial camera are juxtaposed and hinged to one end of the robotic arm close to the welding torch body. The light source and the industrial camera are respectively electrically connected to the electric control box.

[0012] As a preferred solution: The automotive control arm includes an intermediate connecting arm, a horizontal bushing, and two vertical bushings. The intermediate connecting arm includes a straight arm and an inclined arm. The straight arm is arranged on the central plate along the length direction of the central plate. One end of the inclined arm is a thick diameter end. The thick diameter end of the inclined arm is fixedly connected to the middle part of the straight arm as a whole. The other end of the inclined arm is a thin diameter end. The fixture includes a plurality of middle positioning fixtures and a plurality of end positioning fixtures. The plurality of middle positioning fixtures and the plurality of end positioning fixtures are all arranged on the central plate. One end of the straight arm is provided with a horizontal bushing. The horizontal bushing is detachably connected to the central plate through at least one end positioning fixture. The other end of the straight arm is provided with one of the two vertical bushings. The thin diameter end of the inclined arm is provided with the other of the two vertical bushings. Each vertical bushing is detachably connected to the central plate through at least one end positioning fixture.

[0013] An anti-spatter welding method for an automotive control arm is realized by using the above self anti-spatter welding assembly. Place the automotive control arm to be welded on the rotating workbench, position the automotive control arm by using the fixture, and fasten the fixture to the rotating workbench through screws;

[0014] When welding according to the welding sequence set by the electric control box, the U-shaped cover plate and the arc cover plate in the enclosure contact the fixture and / or the automotive control arm prior to the welding torch body. The U-shaped cover plate and the arc cover plate automatically expand and contract along the axis of the sliding guide post by overcoming the elastic force of the elastic damper according to the convexity and concavity of the surface of the fixture and / or the automotive control arm, so that the whole or part of the enclosure expands and contracts deforming to form a dynamic variable amplitude cover body with an adapted shape that fits on the fixture and / or the automotive control arm. The internal area of the dynamic variable amplitude cover body is the anti-spatter shielding area;

[0015] The automotive control arm is positioned on the center plate by a fixture. The axial direction of the rotating shaft is the direction of the X-axis, the thickness direction of the vertical support plate is the direction of the Y-axis, and the height direction of the vertical support plate is the direction of the Z-axis. Three welds are made on the robotic arm. The weld in the plane formed by the X-axis and the Y-axis is the first weld, the weld in the plane formed by the X-axis and the Z-axis is the second weld, and the weld in the plane formed by the Y-axis and the Z-axis is the third weld. The process of the welding gun body completing the welding operation of the three welds under the dynamic occlusion cooperation of the dynamic self-occluding welding gun is that the electric control box controls the belt drive assembly to rotate. The belt drive assembly drives the rotating workbench to rotate towards the robotic arm direction at a predetermined corresponding angle. The welding gun body makes a corresponding movement close to the center plate driven by the robotic arm. After ensuring that the angle formed between the plate surface direction of the center plate and the axial direction of the welding gun body reaches a predetermined angle, the dynamic amplitude-changing cover body undergoes corresponding occlusion deformation and then welding operation is carried out;

[0016] The operation process of the welding gun body changing positions is that the robotic arm rotates or revolves to drive the welding gun body to adjust the welding gun body to a predetermined position. The power shaft in the robotic arm drives the outer gear ring sleeve and the welding gun body to revolve, driving the inner gear ring sleeve meshing with the outer gear ring sleeve to rotate passively. The inner gear ring sleeve drives the enclosure to rotate synchronously. After ensuring that the center position of the anti-spatter occlusion area coincides with the central axis of the welding gun body and the automotive control arm, the welding gun body is started to carry out the welding operation.

[0017] The beneficial effects of the present invention are as follows:

[0018] First, the dynamic self-occluding welding gun in the present invention is a self-occluding welding slag welding gun with a circumferential occlusion area that changes as needed. Through the mutual cooperation of the outer gear ring sleeve and the enclosure, a circumferential occlusion structure form sleeved on the welding gun body can be formed. The area of occluding welding slag changes with the moving direction of the welding gun and the spatter direction of the welding slag, and can be dynamically adjusted as needed.

[0019] Second, the self-preventing spatter welding assembly of the present invention is a structural form formed by the mutual cooperation among the base, the robotic arm, the rotating workbench, the electric control box, the fixture, the automotive control arm, and the dynamic self-occluding welding gun. It can improve the standardized unified processing form of multiple multi-directional weld beads, which is conducive to improving the unified and standardized welding quality.

[0020] III. The operation method of the anti-spatter welding method for the automotive control arm in the present invention is unified and can be adjusted as needed, which is conducive to forming a standardized and unified method for dealing with anti-welding slag spatter. In the enclosure of the present invention, the U-shaped cover plate and the arc cover plate are combined to form a dynamically variable amplitude cover body with an adapted shape that semi-wraps the welding torch body. The U-shaped cover plate and the arc cover plate can freely expand and contract relative to the welding torch body. When the U-shaped cover plate and the arc cover plate contact the fixture and / or the automotive control arm, they automatically expand and contract according to the convexity and concavity of the contact part, so that the U-shaped cover plate and the arc cover plate fit on the fixture and / or the automotive control arm, forming a spatter-proof shielding area that continuously and real-time changes with the contact shape in the welding area, effectively blocking the escape of welding slag spatter, thereby achieving one of the beneficial effects of the anti-spatter device with on-demand self-adaptation, quick self-emergency response, and overall or local self-deformation.

[0021] In order to weld the weld seams in different spatial planes in the present invention, the automotive control arm can rotate together with the rotary workbench. When it is necessary to adjust the spatial orientation of the welding torch body, the robotic arm rotates or revolves to drive the welding torch body to reach that orientation. The robotic arm drives the welding torch body to revolve through the external gear ring sleeve, driving the internal gear ring sleeve meshing with it, and the internal gear ring sleeve then drives the spatter-proof shielding area formed by the enclosure to rotate to a reasonable spatial position relative to the welding torch body and the automotive control arm.

[0022] In the present invention, the industrial camera and the light source are hinged on the robotic arm and transmit the images to the electric control box to monitor the weld quality in real time. The present invention successfully solves the problem that welding slag splashes onto the non-welding area during welding, and uses the camera to collect the photos of the weld state to monitor the welding quality in real time. The anti-spatter device realizes the "three automations" of on-demand self-adaptation, quick self-emergency response, and overall or local self-deformation. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is the first three-dimensional structure schematic diagram of the present invention;

[0024] Figure 2 is the second three-dimensional structure schematic diagram of the present invention;

[0025] Figure 3 is the front view structure schematic diagram of the present invention;

[0026] Figure 4 is the top view structure schematic diagram of the present invention;

[0027] Figure 5 is Figure 1 the three-dimensional structure schematic diagram of part A in

[0028] Figure 6 is the cross-sectional view of the dynamically self-shielding welding torch, and the cross-section direction in the figure is longitudinally cut along the axial direction of the welding torch body, and the gap between the U-shaped cover plate and the welding torch body is N;

[0029] Figure 7 It is a schematic three-dimensional structure diagram of a dynamic self-shielding welding torch. In the figure, the gap between the U-shaped cover plate and the arc cover plate is M;

[0030] Figure 8 It is a schematic front view structure diagram of the U-shaped cover plate of the parts in the present invention;

[0031] Figure 9 It is a schematic top view structure diagram of the U-shaped cover plate;

[0032] Figure 10 It is a schematic cross-sectional view structure diagram of the arc cover plate.

[0033] In the figure: 1. Base; 2. Belt drive assembly; 3. Robot arm; 4. Rotating workbench; 4-1. Central plate; 4-2. Vertical support plate; 4-3. Rotating shaft; 5. Electric control box; 6. Fixture; 6-1. Central positioning fixture; 6-2. End positioning fixture; 7. Automotive control arm; 7-1. Intermediate connecting arm; 7-2. Vertical bushing; 7-3. Horizontal bushing; 8. Outer gear ring sleeve; 9. Welding torch body; 10. Enclosure; 10-1. U-shaped cover plate; 10-2. Arc cover plate; 10-3. Sliding guide post; 10-4. Elastic damper; 10-5. Sliding guide post sleeve; 10-6. Rubber ring; 10-7. Inner gear ring sleeve; 11. Light source; 12. Industrial camera. Specific embodiments

[0034] The following uses specific specific examples to illustrate the implementation manners of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can be implemented or applied through different specific implementation manners. All details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention, and all belong to the scope of protection of the present invention.

[0035] Specific embodiment one: Combine Figures 1 to 10As shown in the figure, the dynamic self-shielding welding torch in this embodiment is characterized in that it includes an external gear ring sleeve 8, a welding torch body 9, and an enclosing member 10. The external gear ring sleeve 8 is sleeved on the welding torch body 9, and the enclosing member 10 is arranged on the external gear ring sleeve 8. The enclosing member 10 includes a U-shaped cover plate 10-1, an internal gear ring sleeve 10-7, and two arc-shaped cover plates 10-2. The internal gear ring sleeve 10-7 is coaxially sleeved outside the external gear ring sleeve 8, and the inner wall of the internal gear ring sleeve 10-7 meshes with the outer wall of the external gear ring sleeve 8. The U-shaped cover plate 10-1 is sleeved at the tip of the welding torch body 9, and the two arc-shaped cover plates 10-2 are respectively arranged on both sides of the U-shaped cover plate 10-1. The inner walls of the U-shaped cover plate 10-1 and the two arc-shaped cover plates 10-2 enclose a dynamic amplitude-changing cover body that cooperates with the welding torch body 9. The bottom of the U-shaped cover plate 10-1 is connected to the internal gear ring sleeve 10-7, and the bottom of each arc-shaped cover plate 10-2 is connected to the internal gear ring sleeve 10-7.

[0036] In this embodiment, through holes are provided at the arc-shaped top ends of the U-shaped cover plate 10-1. The U-shaped cover plate 10-1 is sleeved at the tip of the welding torch body 9, and the two arc-shaped cover plates 10-2 are respectively arranged on both sides of the U-shaped cover plate 10-1. The inner walls of the U-shaped cover plate 10-1 and the two arc-shaped cover plates 10-2 enclose a dynamic amplitude-changing cover body that cooperates with the welding torch body 9. The dynamic amplitude-changing cover body can effectively prevent welding slag from overflowing or splashing.

[0037] In this embodiment, the edge of each side of the U-shaped cover plate 10-1 is in clearance fit with the adjacent arc-shaped cover plate 10-2. That is, the clearance between the U-shaped cover plate 10-1 and the welding torch body 9 is N, and the clearance between the U-shaped cover plate 10-1 and the arc-shaped cover plate 10-2 is M. The settings of the above clearances can not only provide space for the continuous entry and exit of oxygen during the welding process but also form a narrow structure to effectively prevent welding slag from splashing out.

[0038] Specific embodiment two: This embodiment is a further limitation of specific embodiment one. In this embodiment, the enclosing member 10 further includes a sliding guide post 10-3, an elastic damper 10-4, a sliding guide post sleeve 10-5, and a rubber ring 10-6. The sliding guide post 10-3 is fixedly connected to the U-shaped cover plate 10-1 and / or the arc-shaped cover plate 10-2. The sliding guide post sleeve 10-5 is fixedly connected to the internal gear ring sleeve 10-7. The sliding guide post 10-3 is telescopically connected in the sliding guide post sleeve 10-5, and an elastic damper 10-4 component is arranged between the sliding guide post 10-3 and the sliding guide post sleeve 10-5 to ensure that the U-shaped cover plate 10-1 and the arc-shaped cover plate 10-2 can contract or reset relative to the welding torch body 9 flexibly and freely.

[0039] On the other side of the outer gear ring sleeve 8 in the dynamic self-blocking welding torch, it is fixedly connected to the power shaft inside the robotic arm 3. The power shaft can drive the inner gear ring sleeve 10-7 meshing with it to rotate through the outer gear ring sleeve 8, and the enclosure 10 fixedly connected to the inner gear ring sleeve 10-7 follows the movement together;

[0040] During welding, when the U-shaped cover plate 10-1 and / or the arc cover plate 10-2 contact the fixture 6 and / or the vehicle control arm 7, the U-shaped cover plate 10-1 and / or the arc cover plate 10-2 automatically expand and contract according to the convexity and concavity of the surface of the fixture 6 and / or the vehicle control arm 7, so that the enclosure 10 fits on the fixture 6 and / or the vehicle control arm 7, forming a splash-proof shielding area that continuously and real-time changes with the contact shape in the welding area, effectively blocking the splashing and escaping of welding slag.

[0041] Specific Embodiment 3: This embodiment is a further limitation of Specific Embodiment 1. In this embodiment, the inner gear ring sleeve 10-7 of the enclosure 10 meshes with the outer gear ring sleeve 8 internally and externally, so that the dynamic amplitude-changing cover body formed by the combination of the U-shaped cover plate 10-1 and the arc cover plate 10-2 semi-wraps the gun head of the welding torch body 9.

[0042] When it is necessary to adjust the spatial orientation of the welding torch body 9, the robotic arm 3 rotates or turns itself to drive the welding torch body 9 to reach that orientation. The power shaft in the robotic arm 3 drives the outer gear ring sleeve 8 and the welding torch body 9 to rotate, driving the inner gear ring sleeve 10-7 meshing with the outer gear ring sleeve 8 to rotate passively. The inner gear ring sleeve 10-7 will drive the enclosure 10 to rotate synchronously, ensuring that the splash-proof shielding area formed by the enclosure 10 rotates to a reasonable spatial position with respect to the welding torch body 9 and the vehicle control arm 7.

[0043] Specific Embodiment 4: This embodiment is a further limitation of Specific Embodiments 1, 2, or 3. In this embodiment, rubber rings 10-6 are provided at the front edge of the U-shaped cover plate 10-1 and the outer circumference of the arc cover plate 10-2. The rubber rings 10-6 are high-temperature resistant rubber rings, protecting the surface of the vehicle control arm in contact with them from damage.

[0044] 10. Specific Embodiment 5: As shown in Figures 1 to 10 The self-splash-proof welding assembly in this embodiment includes a base 1, a robotic arm 3, a self-rotating workbench 4, an electric control box 5, a fixture 6, a vehicle control arm 7, and a dynamic self-blocking welding torch. The base 1 is horizontally arranged. The robotic arm 3 and the self-rotating workbench 4 are arranged side by side on the base 1. The electric control box 5 is arranged on the base 1. The electric control box 5 is electrically connected to the robotic arm 3 and the self-rotating workbench 4 respectively. A dynamic self-blocking welding torch is arranged on the robotic arm 3. A vehicle control arm 7 is arranged on the self-rotating workbench 4. The vehicle control arm 7 is detachably connected to the self-rotating workbench 4 through the fixture 6;

[0045] The dynamic self-shielding welding torch includes an external gear ring sleeve 8, a welding torch body 9, and an enclosing member 10. The external gear ring sleeve 8 is sleeved on the welding torch body 9, and the enclosing member 10 is arranged on the external gear ring sleeve 8. The enclosing member 10 includes a U-shaped cover plate 10-1, an internal gear ring sleeve 10-7, and two arc cover plates 10-2. The internal gear ring sleeve 10-7 is coaxially sleeved outside the external gear ring sleeve 8, and the inner wall of the internal gear ring sleeve 10-7 meshes with the outer wall of the external gear ring sleeve 8. The U-shaped cover plate 10-1 is sleeved at the gun head of the welding torch body 9, and the two arc cover plates 10-2 are respectively arranged on both sides of the U-shaped cover plate 10-1. The inner walls of the U-shaped cover plate 10-1 and the two arc cover plates 10-2 enclose a dynamic amplitude-changing cover body that cooperates with the welding torch body 9. The bottom of the U-shaped cover plate 10-1 is connected to the internal gear ring sleeve 10-7, and the bottom of each arc cover plate 10-2 is connected to the internal gear ring sleeve 10-7. The automotive control arm 7 to be welded is placed on the rotary table 4. The automotive control arm 7 is positioned by the fixture 6 and is detachably connected to the rotary table 4;

[0046] The automotive control arm 7 includes one intermediate connecting arm 7-1, two vertical bushings 7-2, and one horizontal bushing 7-3. The fixture 6 includes a central positioning fixture 6-1 and an end positioning fixture 6-2. First, the intermediate connecting arm 7-1 is placed in the central positioning fixture 6-1 on the rotary table 4 for positioning. Then, the vertical bushings 7-2 and the horizontal bushing 7-3 are respectively placed at the three ends of the intermediate connecting arm 7-1 according to the design requirements and are positioned by the end positioning fixture 6-2. After the above four components are accurately positioned, they are fastened with screws. Combining Figure 4 As shown, the specific structure is that the intermediate connecting arm 7-1 includes a straight arm and an inclined arm. The straight arm is arranged on the central plate 4-1 along the length direction of the central plate 4-1. One end of the inclined arm is a thick-diameter end, and the thick-diameter end of the inclined arm is fixedly connected to the middle of the straight arm as a whole. The other end of the inclined arm is a thin-diameter end. The fixture 6 includes a plurality of central positioning fixtures 6-1 and a plurality of end positioning fixtures 6-2. The plurality of central positioning fixtures 6-1 and the plurality of end positioning fixtures 6-2 are all arranged on the central plate 4-1. One end of the straight arm is provided with a horizontal bushing 7-3, and the horizontal bushing 7-3 is detachably connected to the central plate 4-1 through at least one end positioning fixture 6-2. The other end of the straight arm is provided with one of the two vertical bushings 7-2, and the thin-diameter end of the inclined arm is provided with the other of the two vertical bushings 7-2. Each vertical bushing 7-2 is detachably connected to the central plate 4-1 through at least one end positioning fixture 6-2.

[0047] Embodiment Six: This embodiment is a further limitation of Embodiment Five. In this self - splash - proof welding assembly, the rotating workbench 4 includes a central plate 4 - 1, a belt drive assembly 2, two vertical support plates 4 - 2, and two rotating shafts 4 - 3. The two vertical support plates 4 - 2 are vertically arranged in parallel on the base 1. The central plate 4 - 1 is arranged between the two vertical support plates 4 - 2. The vertical support plates 4 - 2 and the rotating shafts 4 - 3 are arranged in one - to - one correspondence. One rotating shaft 4 - 3 is respectively arranged at both ends of the central plate 4 - 1. One end of each rotating shaft 4 - 3 is connected to the central plate 4 - 1. The fixture 6 is arranged on the side wall of the central plate 4 - 1. The other end of each rotating shaft 4 - 3 is hinged to its corresponding vertical support plate 4 - 2. The belt drive assembly 2 includes a belt pulley, a belt, and a motor. The belt drive assembly 2 is arranged on the outer wall of any one of the two vertical support plates 4 - 2. The belt pulley in the belt drive assembly 2 is connected to the rotating shaft 4 - 3 close to it, and the other belt pulley is fixedly connected to the motor shaft. The belt is wound around and connects the two belt pulleys. The central plate 4 - 1 makes a circumferential flipping motion between the two vertical support plates 4 - 2 driven by the belt drive assembly 2. The motor is electrically connected to the electric control box 5.

[0048] Embodiment Seven: This embodiment is a further limitation of Embodiment Five or Six. This self - splash - proof welding assembly further includes a light source 11 and an industrial camera 12. The light source 11 and the industrial camera 12 are hinged at one end of the mechanical arm 3 close to the tip of the welding torch body 9 and are electrically connected to the electric control box 5. The weld image taken by the industrial camera 12 can be transmitted to the electric control box 5, which is convenient for real - time monitoring of the weld quality and data storage.

[0049] Embodiment Eight: As shown in Figures 1 to 10 This embodiment, the method for anti - splash welding of an automotive control arm is realized by using the self - splash - proof welding assembly. The specific content of the method is to place the automotive control arm 7 to be welded on the rotating workbench 4, use the fixture 6 to position the automotive control arm 7, and fasten the fixture 6 to the rotating workbench 4 with screws;

[0050] When welding according to the welding sequence set by the electric control box 5, the U - shaped cover plate 10 - 1 and the arc cover plate 10 - 2 in the enclosure 10 contact the fixture 6 and / or the automotive control arm 7 prior to the welding torch body 9. The U - shaped cover plate 10 - 1 and the arc cover plate 10 - 2 automatically expand and contract along the axis of the sliding guide post 10 - 3 by overcoming the elastic force of the elastic damper 10 - 4 according to the convexity and concavity of the surface of the fixture 6 and / or the automotive control arm 7, so that the whole or part of the enclosure 10 expands and contracts to form a dynamic variable - amplitude cover body with an adapted shape that fits on the fixture 6 and / or the automotive control arm 7. The internal area of the dynamic variable - amplitude cover body is the anti - splash shielding area;

[0051] The automotive control arm 7 is positioned on the center plate 4-1 by the fixture 6. The axial direction of the rotating shaft 4-3 is the direction where the X-axis is located. The thickness direction of the vertical support plate 4-2 is the direction where the Y-axis is located. The height direction of the vertical support plate 4-2 is the direction where the Z-axis is located. Three welds are made on the robotic arm 3. The weld in the plane formed by the X-axis and the Y-axis is the first weld. The weld in the plane formed by the X-axis and the Z-axis is the second weld. The weld in the plane formed by the Y-axis and the Z-axis is the third weld. The process of the welding gun body 9 completing the welding operation of the three welds under the dynamic occlusion cooperation of the dynamic self-occluding welding gun is that the electric control box 5 controls the belt drive assembly 2 to rotate. The belt drive assembly 2 drives the rotating workbench 4 to rotate towards the robotic arm 3 at a predetermined corresponding angle. The welding gun body 9 makes a corresponding movement close to the center plate 4-1 driven by the robotic arm 3. After ensuring that the included angle formed between the plate surface direction of the center plate 4-1 and the axial direction of the welding gun body 9 reaches a predetermined angle, the dynamic amplitude-changing cover body undergoes corresponding occlusion deformation and then the welding operation is carried out;

[0052] The operation process of the welding gun body 9 changing positions is that the robotic arm 3 rotates or revolves to drive the welding gun body 9 to adjust the welding gun body 9 to a predetermined position. The power shaft in the robotic arm 3 drives the external gear ring sleeve 8 and the welding gun body 9 to revolve, driving the internal gear ring sleeve 10-7 meshing with the external gear ring sleeve 8 to rotate passively. The internal gear ring sleeve 10-7 drives the enclosure 10 to rotate synchronously. After ensuring that the center position of the anti-spatter occlusion area coincides with the central axis of the welding gun body 9 and the automotive control arm 7, the welding gun body 9 is started to carry out the welding operation.

[0053] In this embodiment, after the automotive control arm 7 to be welded is placed on the center plate 4-1 of the workbench 4, the fixture 6 is a special fixture adapted to the automotive control arm 7, and its structural form is the same as that of the special fixture supporting the existing automotive control arm. The special fixture 6 is used to quickly and accurately position the automotive control arm 7 and is fastened to the center plate 4-1 by screws. First, the intermediate connecting arm 7-1 is placed in the central positioning fixture 6-1 of the rotating workbench 4 for positioning. Then, the vertical shaft sleeve 7-2 and the horizontal shaft sleeve 7-3 are respectively placed at the three end parts of the intermediate connecting arm 7-1 according to the design requirements and are positioned by the end positioning fixture 6-2. After the above 4 components are accurately positioned, they are fastened by screws;

[0054] When welding according to the welding sequence set by the electric control box 5, the U-shaped cover plate 10-1 and the arc cover plate 10-2 in the enclosure 10 contact the fixture 6 and / or the vehicle control arm 7 prior to the welding torch body 9. The U-shaped cover plate 10-1 and the arc cover plate 10-2 automatically expand and contract along the axis of the sliding guide post 10-3 by overcoming the elastic force of the elastic damping body 10-4 according to the convexities and concavities on the surface of the fixture 6 and / or the vehicle control arm 7, causing the enclosure 10 to expand, contract, or deform locally as a whole to form a dynamically variable amplitude cover body that fits the fixture 6 and / or the vehicle control arm 7 in a matching shape. The internal area of the dynamically variable amplitude cover body is the splash-proof shielding area;

[0055] The central plate 4-1 is fixed on the plane of the vehicle control arm 7. The X-axis is set parallel to the center line of the rotating shaft 4-3, the Y-axis is perpendicular to the X-axis, and the Z-axis is perpendicular to the plane of the central plate 4-1. When all the welds in the plane formed by the parallel X and Y axes and the welds in the plane formed by the parallel X and Z axes or Y and Z axes and facing the robotic arm 3 are completed, and when welding the welds in the plane formed by the parallel X and Z axes or Y and Z axes but facing away from the robotic arm 3 is required, the electric control box 5 controls the belt drive assembly 2 to rotate. The belt drive assembly 2 drives the self-rotating workbench 4 to flip by a corresponding angle in the direction of the robotic arm 3. The welding torch body 9 makes a corresponding movement closer to the central plate 4-1 driven by the robotic arm 3. After ensuring that the angle formed between the plane direction of the central plate 4-1 and the axial direction of the welding torch body 9 reaches a predetermined angle, the dynamically variable amplitude cover body undergoes corresponding shielding deformation and then welding operations are carried out;

[0056] For reasons such as avoiding interference between the welding torch body 9 and other workpieces and improving the welding convenience and quality, when adjusting the spatial orientation of the welding torch body 9, the robotic arm 3 rotates or turns to drive the welding torch body 9 to reach that orientation. The power shaft in the robotic arm 3 drives the external gear ring sleeve 8 and the welding torch body 9 to rotate, driving the internal gear ring sleeve 10-7 meshing with the external gear ring sleeve 8 to rotate passively. The internal gear ring sleeve 10-7 will drive the enclosure 10 to rotate synchronously, ensuring that the central position of the splash-proof shielding area formed by the enclosure 10 coincides with the contact position between the welding torch body 9 and the vehicle control arm 7, that is, the end line of the U-shaped cover plate 10-1 in the enclosure 10 is parallel to the plane of the contacted fixture and / or the vehicle control arm, and if it is a curved surface, it is arranged tangentially correspondingly;

[0057] In this embodiment, the structure, composition, and connection relationship of the dynamically self-shielding welding torch and the self-splash-proof welding assembly are the same as those in the first, second, third, fourth, fifth, sixth, or seventh specific embodiments without being mentioned.

Claims

1. A dynamic self-blocking welding torch, characterized in that: It includes an external gear ring sleeve (8), a welding torch body (9) and an enclosing member (10). The external gear ring sleeve (8) is sleeved on the welding torch body (9), and the enclosing member (10) is arranged on the external gear ring sleeve (8). The enclosing member (10) includes a U-shaped cover plate (10-1), an internal gear ring sleeve (10-7) and two arc-shaped cover plates (10-2). The internal gear ring sleeve (10-7) is coaxially sleeved outside the external gear ring sleeve (8), and the inner wall of the internal gear ring sleeve (10-7) meshes with the outer wall of the external gear ring sleeve (8). The U-shaped cover plate (10-1) is sleeved at the gun head of the welding torch body (9), and the two arc-shaped cover plates (10-2) are respectively arranged on both sides of the U-shaped cover plate (10-1). The inner walls of the U-shaped cover plate (10-1) and the two arc-shaped cover plates (10-2) enclose a dynamic amplitude-varying cover body for cooperating with the welding torch body (9). The bottom of the U-shaped cover plate (10-1) is connected to the internal gear ring sleeve (10-7), and the bottom of each arc-shaped cover plate (10-2) is connected to the internal gear ring sleeve (10-7).

2. The dynamic self-shielding welding torch according to claim 1, wherein: The edge gap between each side of the U-shaped cover plate (10-1) and an adjacent arc-shaped cover plate (10-2) is set.

3. The dynamic self-shielding welding torch according to claim 1 or 2, characterized in that: The enclosing member (10) further includes a sliding guide post (10-3), an elastic damper (10-4), a sliding guide post sleeve (10-5), and a rubber ring (10-6). The sliding guide post (10-3) is fixedly connected to the U-shaped cover plate (10-1) and / or the arc-shaped cover plate (10-2), the sliding guide post sleeve (10-5) is fixedly connected to the internal gear ring sleeve (10-7), the sliding guide post (10-3) is telescopically slidably connected in the sliding guide post sleeve (10-5), and an elastic damper (10-4) is arranged between the sliding guide post (10-3) and the sliding guide post sleeve (10-5).

4. The dynamic self-shielding welding torch according to claim 1, 2 or 3, characterized in that: Rubber rings (10-6) are arranged at the front edge of the U-shaped cover plate (10-1) and the outer circumference of the arc-shaped cover plate (10-2), and the rubber rings (10-6) are high-temperature resistant rubber rings.

5. A self-protecting splash-proof welding assembly, which is composed of the dynamic self-shielding welding torch described in claim 1, 2, 3 or 4, and is characterized in that: It includes a base (1), a robotic arm (3), a rotary table (4), an electric control box (5), a fixture (6), an automotive control arm (7) and a dynamic self-shielding welding torch. The base (1) is horizontally arranged, the robotic arm (3) and the rotary table (4) are arranged side by side on the base (1), the electric control box (5) is arranged on the base (1), the electric control box (5) is electrically connected to the robotic arm (3) and the rotary table (4) respectively. A dynamic self-shielding welding torch is arranged on the robotic arm (3), an automotive control arm (7) is arranged on the rotary table (4), and the automotive control arm (7) is detachably connected to the rotary table (4) through the fixture (6); The dynamic self-shielding welding torch includes an external gear ring sleeve (8), a welding torch body (9), and an enclosing member (10). The external gear ring sleeve (8) is sleeved on the welding torch body (9), and the enclosing member (10) is arranged on the external gear ring sleeve (8). The enclosing member (10) includes a U-shaped cover plate (10-1), an internal gear ring sleeve (10-7), and two arc-shaped cover plates (10-2). The internal gear ring sleeve (10-7) is coaxially sleeved outside the external gear ring sleeve (8), and the inner wall of the internal gear ring sleeve (10-7) meshes with the outer wall of the external gear ring sleeve (8). The U-shaped cover plate (10-1) is sleeved at the gun head of the welding torch body (9), and the two arc-shaped cover plates (10-2) are respectively arranged on both sides of the U-shaped cover plate (10-1). The inner walls of the U-shaped cover plate (10-1) and the two arc-shaped cover plates (10-2) enclose a dynamic amplitude-changing cover body that cooperates with the welding torch body (9). The bottom of the U-shaped cover plate (10-1) is connected to the internal gear ring sleeve (10-7), and the bottom of each arc-shaped cover plate (10-2) is connected to the internal gear ring sleeve (10-7).

6. The self-protective splash-proof welding assembly according to claim 5, wherein: The rotary worktable (4) includes a center plate (4-1), a belt drive assembly (2), two vertical support plates (4-2), and two rotating shafts (4-3). The two vertical support plates (4-2) are vertically arranged side by side on the base (1). The center plate (4-1) is arranged between the two vertical support plates (4-2). The vertical support plates (4-2) and the rotating shafts (4-3) are arranged in one-to-one correspondence. One rotating shaft (4-3) is respectively arranged at both ends of the center plate (4-1). One end of each rotating shaft (4-3) is connected to the center plate (4-1). The fixture (6) is arranged on the side wall of the center plate (4-1). The other end of each rotating shaft (4-3) is hinged to its corresponding vertical support plate (4-2). The belt drive assembly (2) is arranged on the outer wall of any one of the two vertical support plates (4-2). The belt drive assembly (2) is connected to the rotating shaft (4-3) closest to it. The center plate (4-1) makes a circumferential flipping motion between the two vertical support plates (4-2) driven by the belt drive assembly (2).

7. The self-protective splash-proof welding assembly according to claim 6, wherein: It further includes a light source (11) and an industrial camera (12). The light source (11) and the industrial camera (12) are juxtaposed and hinged to one end of the robotic arm (3) close to the welding torch body (9). The light source (11) and the industrial camera (12) are respectively electrically connected to the electric control box (5).

8. The self-protective splash-proof welding assembly according to claim 6 or 7, characterized in that: The vehicle control arm (7) includes an intermediate connecting arm (7-1), a horizontal bushing (7-3) and two vertical bushings (7-2). The intermediate connecting arm (7-1) includes a straight arm and an inclined arm. The straight arm is arranged on the center plate (4-1) along the length direction of the center plate (4-1). One end of the inclined arm is a thick-diameter end, and the thick-diameter end of the inclined arm is fixedly connected to the middle of the straight arm integrally. The other end of the inclined arm is a thin-diameter end. The fixture (6) includes a plurality of middle positioning fixtures (6-1) and a plurality of end positioning fixtures (6-2). The plurality of middle positioning fixtures (6-1) and the plurality of end positioning fixtures (6-2) are both arranged on the center plate (4-1). One end of the straight arm is provided with a horizontal bushing (7-3), and the horizontal bushing (7-3) is detachably connected to the center plate (4-1) through at least one end positioning fixture (6-2). The other end of the straight arm is provided with one of the two vertical bushings (7-2), and the thin-diameter end of the inclined arm is provided with the other of the two vertical bushings (7-2). Each vertical bushing (7-2) is detachably connected to the center plate (4-1) through at least one end positioning fixture (6-2).

9. A method for preventing splash during welding of an automotive control arm, which is realized by using the self-preventing splash welding assembly described in claims 5, 6, 7 or 8, characterized in that: Place the vehicle control arm (7) to be welded on the rotary worktable (4), use the fixture (6) to position the vehicle control arm (7), and fasten the fixture (6) to the rotary worktable (4) with screws; When welding according to the welding sequence set by the electric control box (5), the U-shaped cover plate (10-1) and the arc cover plate (10-2) in the enclosure (10) contact the fixture (6) and / or the vehicle control arm (7) prior to the welding torch body (9). The U-shaped cover plate (10-1) and the arc cover plate (10-2) automatically expand and contract along the axis of the sliding guide post (10-3) by overcoming the elastic force of the elastic damping body (10-4) according to the convexity and concavity of the surface of the fixture (6) and / or the vehicle control arm (7), so that the whole or part of the enclosure (10) expands and contracts to form a dynamically variable amplitude cover body with an adapted shape that fits on the fixture (6) and / or the vehicle control arm (7). The internal area of the dynamically variable amplitude cover body is a splash-proof shielding area; The automotive control arm (7) is positioned on the center plate (4-1) through the fixture (6). The axial direction of the rotating shaft (4-3) is the direction where the X-axis is located, the thickness direction of the vertical support plate (4-2) is the direction where the Y-axis is located, and the height direction of the vertical support plate (4-2) is the direction where the Z-axis is located. Three welds are made on the robotic arm (3). The three welds are: the weld in the plane formed by the X-axis and the Y-axis is the first weld, the weld in the plane formed by the X-axis and the Z-axis is the second weld, and the weld in the plane formed by the Y-axis and the Z-axis is the third weld. The process of the welding gun body (9) completing the welding operation of the three welds under the dynamic occlusion cooperation of the dynamic self-occluding welding gun is that the electric control box (5) controls the rotation of the belt drive assembly (2), the belt drive assembly (2) drives the self-rotating workbench (4) to rotate towards the robotic arm (3) at a predetermined corresponding angle. The welding gun body (9) makes a corresponding movement close to the center plate (4-1) driven by the robotic arm (3). After ensuring that the included angle formed between the plate surface direction of the center plate (4-1) and the axial direction of the welding gun body (9) reaches a predetermined angle, the dynamic amplitude-changing cover body undergoes corresponding occlusion deformation and then the welding operation is carried out; The operation process of the welding gun body (9) changing positions is to drive the welding gun body (9) to reach the adjusted welding gun body (9) to a predetermined position by the rotation or revolution of the robotic arm (3). The power shaft in the robotic arm (3) drives the external gear ring sleeve (8) and the welding gun body (9) to revolve, driving the internal gear ring sleeve (10-7) meshing with the external gear ring sleeve (8) to rotate passively. The internal gear ring sleeve (10-7) drives the enclosure (10) to rotate synchronously. After ensuring that the center position of the anti-spatter occlusion area coincides with the central axes of the welding gun body (9) and the automotive control arm (7), the welding gun body (9) is started to carry out the welding operation.

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