Linear argon arc welding device and method

Abstract

The invention discloses an argon arc welding linear welding device and method, and particularly relates to the technical field of welding, the device comprises an argon arc welding assembly and a product fixing assembly, a hollow cavity of a product is filled with a filling material, and a plugging pressurizing assembly is arranged at an end opening of the hollow cavity in the upper bottom of a fixing seat; the plugging pressurizing assembly comprises a plugging seat and a plugging moving driver, one end, corresponding to the product, of the plugging seat is provided with a plugging head clamped and matched with the hollow cavity, and the plugging moving driver is used for driving the plugging seat to move. The filling material is added into the hollow cavity of the product, the thin-wall structure of the product is supported by means of the filling material from inside to outside, the product is stably fixed in cooperation with extrusion of the fixing clamp from outside to inside, meanwhile, the filling material can effectively conduct heat of a welding point, and the welding quality of the product is improved. And thermal deformation stress caused by overlarge temperature difference in the length direction of the product is avoided.

Description

Technical Field

[0001] The present invention relates to the field of welding technology, and more specifically, to a argon arc welding linear welding device and method. Background Art

[0002] TIG welding is a welding method that uses a non-consumable tungsten electrode under the protection of an inert gas (usually argon). This method uses the high temperature generated by the arc to melt the workpiece and filler material (if used), and prevents the influence of oxygen and nitrogen in the air on the molten pool during the welding process. It is widely used in the welding industry due to its advantages such as high weld quality, strong applicability, precise control and no spatter.

[0003] TIG welding can adapt to welding situations with high quality requirements: such as aerospace, food processing equipment manufacturing and other industries, where there are high requirements for welding quality and appearance. It can also weld thin plate materials, especially plates with a thickness of less than 3 mm. TIG welding can provide fine heat control to avoid overheating and burn-through. For some difficult-to-weld materials, such as aluminum, magnesium and their alloys that are easily oxidized or have high thermal conductivity, TIG welding can also be effectively welded.

[0004] Among them, for most workpieces, such as the welding combination of two structures, the welding area span is small (for example, welding is mainly performed around the contour line of a workpiece), and the overall volume of the workpiece is small. When using argon arc welding, the heat transfer of all workpieces as a whole is not much different, so the welding quality of the workpiece is relatively high and the welding efficiency is faster.

[0005] In some workpieces, two thin-walled parts need to be welded in a straight line along their length direction. At this time, the welding area has a large span, and the temperature difference between the front and back along the welding route is large during welding, which can easily cause deformation of the workpiece. At this time, the workpiece can be pre-fixed with the help of a fixed structure such as a clamp to provide support pressure to offset the thermal deformation stress caused by the welding temperature difference, thereby ensuring the welding speed while ensuring the welding quality.

[0006] However, in some metal beams or automotive steel parts, some tubular structures (such as square tubes, round tubes and other polygonal tube structures, etc.) are used. Such structures are mostly formed by bending and then the last side is welded in a straight line. At this time, it is only necessary to control the welding gun assembly to weld along a straight path, and the product processing speed is fast. However, when such products are thin-walled workpieces, the welding route span is large, and the heat generated by welding is relatively slow during welding. The temperature difference between the two ends of the workpiece and the welding gun position is large, which will cause uncontrollable welding deformation.

[0007] At this time, although effective fixtures and other fixed structures can be set up to clamp and fix the outside of the workpiece to prevent the workpiece from deforming outward, since the inner cavity of the "tubular" part of the workpiece is relatively long, it is difficult to directly set the same fixed structure as the outside to support it. Therefore, during actual welding, the workpiece will also deform inward, affecting the welding quality and welding accuracy of the product. Summary of the invention

[0008] The present invention provides an argon arc welding linear welding device and method, and aims to solve the problem that it is difficult to directly set a fixed structure identical to the outside to support some existing tubular structures. Therefore, during actual welding, the workpiece will also be deformed inward, affecting the welding quality and welding accuracy of the product.

[0009] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a argon arc welding linear welding device, comprising a argon arc welding assembly and a product fixing assembly, the argon arc welding assembly comprising a welding gun and a welding moving driver, the product fixing assembly comprising a fixing seat, the fixing seat being provided with a plurality of fixing fixtures for squeezing and fixing the outer wall of the product, the interior of the hollow cavity of the product being filled with a filling material, and a sealing and pressurizing assembly being provided at the port of the hollow cavity at the upper bottom of the fixing seat; The plugging and pressurizing assembly includes a plugging seat and a plugging movable driver. The plugging seat is slidably set on the fixed seat. One end of the plugging seat corresponding to the product is provided with a plugging head that fits the hollow cavity. The plugging movable driver is used to drive the plugging seat to move and make the plugging head seal the port of the hollow cavity. The filling material is a spherical particle structure and a rigid heat-conducting structure is selected.

[0010] In a preferred embodiment, a feed cavity is provided at a position corresponding to the hollow cavity of the sealing seat, and a conveying auger is rotatably installed in the feed cavity. The conveying auger is driven to rotate by a rotating drive device. A feeding pipe is also provided on the sealing seat, and the feeding pipe is connected to the feed cavity, and the feeding pipe is connected to a hopper for storing filling materials.

[0011] In a preferred embodiment, the welding device also includes an air pipe, which is filled and arranged in the product. The air pipe passes through the sealing head and extends to the end of the hollow cavity away from the sealing and pressurizing component. The sealing head is provided with an air outlet pipe that communicates with the inside and outside. The air pipe is connected to an air supply system, which is used to make the air pipe blow out airflow inside the hollow cavity.

[0012] In a preferred embodiment, the gas supply system includes an air pump, which is connected to the air pipe through a pipeline. The air pump is connected to a high-temperature air source and a low-temperature air source through a reversing valve, and the air outlet pipe is connected to an air pump.

[0013] In a preferred embodiment, a through slot is provided at the edge of the plugging head, a clamping plate is clamped and installed in the through slot, and the air delivery pipe passes through the clamping plate and slidably cooperates with the clamping plate.

[0014] In a preferred embodiment, the product fixing assembly also includes a supporting frame, the fixing seat is rotatably mounted on the supporting frame, and a first rotating driver is provided on the supporting frame, the first rotating driver is used to drive the fixing seat to flip and rotate, and the rotation direction of the fixing seat relative to the supporting frame is arranged parallel to the length direction of the product.

[0015] In a preferred embodiment, the welding mobile driver is used to drive the welding gun to move along the welding trajectory. The welding mobile driver is a manipulator structure. The supporting frame includes a base frame and a flip frame. The flip frame is rotatably installed on the base frame. A second rotation driver is provided on the base frame. The second rotation driver is used to drive the flip frame to rotate. The rotation direction of the flip frame is perpendicular to the rotation direction of the fixed seat.

[0016] In a preferred embodiment, the welding device also includes an auxiliary press frame, on which two sets of press wheels are arranged. The two sets of press wheels are respectively arranged corresponding to the materials on both sides of the gap to be welded on the product, and the press wheels roll in cooperation with the above-mentioned materials. The auxiliary press frame moves synchronously with the welding gun.

[0017] In a preferred embodiment, the rotation axis of the pressure wheel is set at an acute angle to the length direction line of the gap to be welded on the auxiliary pressure frame, and a gradient space is provided on one side of the auxiliary pressure frame corresponding to the corresponding material area on the product, and a gap which gradually narrows in the direction away from the welding gun is formed between the gradient space and the material of the product.

[0018] A argon arc welding linear welding method comprises the following steps: Step 1: Place the product on the fixing seat, and operate each fixing fixture to squeeze and fix the outer wall of the product; Step 2: Adjust the posture of the product and fill the product with filling materials; Step 3: Control the plugging head to plug the port of the hollow cavity and further apply pressure; Step 4: Adjust the product to a horizontal position, and drive the welding gun to move along the gap to be welded on the product through the welding mobile driver to perform linear welding; Step 5: Control the plugging head to separate from the product, take out the filling material, and weld the remaining parts of the product to be welded.

[0019] The beneficial effects of the present invention are as follows: the present invention adds filling material into the hollow cavity of the product so that the filling material fills the hollow cavity, and then drives the blocking seat to move by controlling the blocking moving driver. During welding, the thin-walled structure of the product is supported from the inside to the outside by means of the filling material, and the fixing fixture is extruded from the outside to the inside to achieve stable fixation of the product, thereby effectively avoiding thermal deformation of the product during welding with a welding gun. At the same time, the filling material can effectively conduct the heat of the welding point to avoid the formation of thermal deformation stress due to excessive temperature difference along the length direction of the product, especially the temperature at the welding point can be quickly conducted to avoid heat concentration at the welding point, thereby effectively avoiding overheating and burn-through that are prone to occur when welding thin-walled products. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0021] Figure 2 It is another perspective schematic diagram of the present invention.

[0022] Figure 3 This is an enlarged view of the related structure between the port of the product and the plugging head according to the present invention.

[0023] Figure 4 This is a schematic diagram of the structure of the product fixing component of the present invention for fixing the product.

[0024] Figure 5 It is a schematic diagram of the welding state of the present invention.

[0025] Figure 6 This is a schematic diagram of the sealing and pressurizing component of the present invention sealing the cavity in the product and squeezing the filling material inside.

[0026] Figure 7 The figure is a schematic diagram of the structure of the improved support frame according to the present invention.

[0027] Figure 8 This is a schematic diagram of the structure of the present invention used in conjunction with a gas transmission pipe.

[0028] Fig. 9 This is a schematic diagram of the air flow path formed by the air delivery pipe of the present invention inside the product.

[0029] Fig.10 It is a top view of the matching state between the gas delivery pipe and the blocking seat of the present invention.

[0030] Fig.11 It is a schematic diagram of the coordination of the suspended support plate of the present invention inside the cavity of the product.

[0031] Fig.12 4 is a system block diagram of the gas transmission system of the present invention.

[0032] Fig.13 This is a state diagram of the present invention using an auxiliary press frame to assist in pressing the product weld.

[0033] Fig.14 It is a schematic diagram of the gradual change channel inside the auxiliary pressing frame of the present invention.

[0034] Fig.15 This is a diagram showing the connection status between the auxiliary press frame and the welding gun drive assembly of the present invention.

[0035] Fig.16 The figure is a flow chart of the welding method of the present invention.

[0036] The reference numerals are: 1, argon arc welding assembly; 11, welding gun; 12, welding moving driver; 2, product fixing assembly; 21, fixing seat; 211, first rotating driver; 22, fixing fixture; 23, supporting frame; 231, bottom frame; 232, turning frame; 233, second rotating driver; 3, product; 31, hollow cavity; 32, port; 4, plugging and pressurizing assembly; 41, plugging seat; 411, Sealing head; 412, feeding cavity; 413, through-card slot; 42, blocking movable driver; 43, conveying auger; 44, feeding pipe; 45, air outlet pipe; 5, filling material; 6, air pipe; 601, air inlet end; 602, air outlet end; 61, suspended support plate; 62, clamping plate; 63, air pump; 64, reversing valve; 65, high-temperature air source; 66, low-temperature air source; 7, auxiliary pressure frame; 71, pressure wheel. DETAILED DESCRIPTION

[0037] The present application is further described in detail below in conjunction with the accompanying drawings. It is necessary to point out here that the following specific implementation methods are only used to further illustrate the present application and cannot be understood as limiting the scope of protection of the present application. Technical personnel in this field can make some non-essential improvements and adjustments to the present application based on the above application content.

[0038] Refer to the instruction manual Figures 1 to 15 A argon arc welding linear welding device includes an argon arc welding assembly 1 and a product fixing assembly 2, wherein the product fixing assembly 2 is used to fix a product 3, wherein the product 3 processed in this embodiment is mainly a long tubular structure, which is mainly spliced ​​by stamping metal plates and then welding along a straight splicing seam to complete the main welding process of the product, and the argon arc welding assembly 1 includes a welding gun 11 and a welding mobile driver 12, the welding gun 11 is a basic welding structure in the argon arc welding technology, and its principle and detailed scheme are both existing technologies, which will not be explained in detail in this embodiment, and the welding mobile driver 12 is used to drive the welding gun 11 to move along a welding track, wherein the welding mobile driver 12 is preferably a manipulator structure, thereby improving the automation degree and welding accuracy of the welding drive.

[0039] The product fixing assembly 2 includes a fixing seat 21 and a supporting frame 23, wherein the fixing seat 21 is rotatably mounted on the supporting frame 23, and a first rotating driver 211 (such as a driving motor) is provided on the supporting frame 23, and the first rotating driver 211 is used to drive the fixing seat 21 to flip and rotate, wherein the rotation direction of the fixing seat 21 relative to the supporting frame 23 is arranged parallel to the length direction of the product 3, and then after the straight line welding is completed, the product 3 is controlled to flip to adapt to the welding at other positions, and a plurality of groups of fixing clamps 22 for squeezing and fixing the outer wall of the product 3 are provided on the fixing seat 21, and the fixing clamps 22 are commonly used clamp components in the field of product fixing, such as various quick clamps in the prior art, and it is only necessary to reasonably set a corresponding number of fixing clamps 22 on the outside of the product 3 according to the shape of the product 3 to achieve the fixation of the product 3, therefore, the specific structure of the fixing clamp 22 is not explained in detail in this embodiment.

[0040] To ensure the quality of welding, the interior of the hollow cavity 31 of the product 3 is filled with filling material 5, and a sealing pressurizing component 4 is arranged at the port 32 of the hollow cavity 31 on the upper bottom of the fixed seat 21. The sealing pressurizing component 4 includes a sealing seat 41 and a sealing movable driver 42. The sealing seat 41 is slidably arranged on the fixed seat 21, and a sealing head 411 which is engaged with the port 32 is arranged at one end of the sealing seat 41 corresponding to the product 3. The sealing movable driver 42 is used to drive the sealing seat 41 to move. Since the sealing seat 41 also needs to apply pressure to the filling material 5 in the hollow cavity 31, the sealing movable driver 42 is preferably a hydraulic cylinder structure to provide sufficient pressure.

[0041] Before actual welding, the filling material 5 is first added to the hollow cavity 31 of the product 3 so that the filling material 5 fills the hollow cavity 31, and then the sealing seat 41 is driven to move by controlling the sealing moving driver 42 to seal the port 32 of the hollow cavity 31. At the same time, the sealing head 411 enters the hollow cavity 31 and continuously squeezes to ensure that the filling material 5 is tightly filled in the hollow cavity 31. If necessary, a corresponding pressure sensor can be set on the sealing head 411 to obtain the pressure value of the sealing seat 41 on the filling material 5, and then judge the filling effect of the filling material 5. The filling material 5 can use a small spherical structure. In order to reduce weight, the filling material 5 is preferably a hollow spherical structure, and the filling material 5 can choose a rigid structure such as a metal structure and a ceramic structure. Then, during welding, the thin-walled structure of the product 3 is welded from the inside to the outside with the help of the filling material 5. The product 3 is supported by the fixing fixture 22 and squeezed from the outside to the inside to achieve stable fixation of the product 3, thereby effectively avoiding thermal deformation of the product 3 during welding with the welding gun 11. At the same time, since the filling material 5 fills the hollow cavity 31, compared with the case where there is only air in the original hollow cavity 31, the heat of the welding point can be effectively conducted with the help of the close contact of each filling material 5, thereby avoiding the formation of thermal deformation stress due to excessive temperature difference along the length direction of the product 3. Among them, the filling material 5 is preferably a metal ball structure, and the melting point of the metal material of the filling material 5 is higher than the melting point of the product 3. Then, in the welding process, due to the presence of the filling material 5 on the back of the weld, the temperature at the welding point can be quickly conducted to avoid heat concentration at the welding point, thereby effectively avoiding overheating and burn-through that are prone to occur when welding thin-walled products 3.

[0042] It should be noted that in the present embodiment, one end of the product 3 is sealed, and therefore, the hollow cavity 31 is open at only one end, so it is only necessary to set a set of sealing and pressurizing components 4 at the corresponding position of the opening. For the product 3 with openings at both ends, sealing and pressurizing components 4 can be set at both ends.

[0043] Furthermore, since the plugging head 411 is limited in its extension into the hollow cavity 31, this embodiment also provides another method of pressurizing the filling material 5. Figure 6The sealing seat 41 is provided with a feeding cavity 412 at a position corresponding to the hollow cavity 31, and a conveying auger 43 is rotatably installed in the feeding cavity 412, and the conveying auger 43 is driven to rotate by a rotating driving device. A feeding pipe 44 is also provided on the sealing seat 41, and the feeding pipe 44 is connected to the feeding cavity 412. When in use, the feeding pipe 44 is connected to a hopper storing a large amount of filling material 5. Before fixing the product 3, the maximum amount of filling material 5 can be added to the product 3 first, and then the port 32 of the hollow cavity 31 is blocked with the help of the sealing head 411, and the conveying auger 43 is driven to rotate, so that the external filling material 5 can be spirally extruded and conveyed into the hollow cavity 31 to fill the remaining space during pre-filling (the sealing head 411 does not need to be completely sealed with the hollow cavity 31, it only needs to ensure that the filling material 5 does not overflow, so air can overflow from the gap). At the same time, continuously driving the conveying auger 43 to rotate can further increase the pressure of the filling material 5 in the hollow cavity 31.

[0044] Refer to the instruction manual Figure 7 In order to facilitate the filling of the filling material 5, the present embodiment further improves the supporting frame 23, and the supporting frame 23 includes a base frame 231 and a flip frame 232. The flip frame 232 is rotatably mounted on the base frame 231, and a second rotation driver 233 is provided on the base frame 231. The second rotation driver 233 is used to drive the flip frame 232 to rotate. For example, by using a top-pushing hydraulic cylinder, the height of the two ends of the flip frame 232 can be adjusted to realize the rotation drive of the flip frame 232, and the rotation direction of the flip frame 232 is perpendicular to the rotation direction of the fixed seat 21, thereby realizing the pitch adjustment of the two ends of the product 3. Therefore, in actual use, the open end of the product 3 can be controlled to tilt upward first to facilitate the filling of the filling material 5. At the same time, based on this scheme, all filling can be directly performed with the help of the conveying auger 43. The filling of material 5, that is, when the open end of product 3 is facing upward, first drive the blocking seat 41 to block the port 32 of the hollow cavity 31, and then drive the conveying auger 43 to continuously input the filling material 5, so as to complete the automatic filling (this solution is suitable for the case where the internal space of the hollow cavity 31 is small and the filling speed is fast). After the welding is completed, control the blocking seat 41 to leave the product 3, and then control the open end of the product 3 to turn down, so that all the filling material 5 can be poured out. It should be noted that the poured out filling material 5 has a certain temperature due to the heat absorbed during welding. Therefore, the recovered filling material 5 can be directly used for the next welding, that is, the filling material 5 filled into the product 3 itself has a certain temperature, so that the product 3 as a whole can be preheated, and the occurrence of thermal deformation caused by heat difference can be further reduced.

[0045] Furthermore, if the particle size of the filling material 5 is too small, although the thermal conductivity is good, the filling material 5 is relatively large, which is difficult to control and has a heavy weight. If the filling material 5 is too large, the gaps between the particles are large, which affects the thermal conductivity. For this reason, the present embodiment also provides the following technical solutions, see the attached manual. Figures 8 to 12 The welding device also includes an air pipe 6, which is filled and arranged in the product 3. The air pipe 6 penetrates the sealing head 411 and extends to the end of the hollow cavity 31 away from the sealing pressurizing component 4. The sealing head 411 is provided with an outlet pipe 45 connected inside and outside (a filter structure can be provided to block the filling material 5). The air pipe 6 is connected to an air supply system, which is used to make the air pipe 6 blow out airflow inside the hollow cavity 31. During the actual welding process (the welding direction is from the sealing part of the product 3 to the opening part), heat conduction is carried out by means of filling and contact of each filling material 5, and secondly, the air supply system is used to make the air pipe 6 overflow from the sealing end inside the product 3, and flow back through the gaps between the filling materials 5, and then output from the outlet pipe 45, thereby forming an airflow inside the product 3 to enhance the heat conduction efficiency.

[0046] Among them, refer to the instructions attached Fig. 9 The part of the gas pipe 6 located outside the product 3 is installed on the sealing seat 41, and the end of the gas pipe 6 located on the sealing seat 41 is set as the gas inlet end 601, and the end of the gas pipe 6 located inside the product 3 is set as the gas outlet end 602, wherein the gas inlet end 601 is connected to the gas supply system. When the gas supply system supplies gas, the gas enters the gas pipe 6 from the right end of the gas inlet end 601 outside, and is then blown out from the left end of the gas outlet end 602. The gas blown out from the gas outlet end 602 returns at the closed structure at the left end of the product 3, and then flows to the right in the product 3.

[0047] It should be noted that since the above-mentioned air flow direction is the same as the straight-line welding direction, the temperature at the actual weld point can be effectively transmitted backward, thereby effectively preheating one end of the principle weld point to improve the welding quality. If necessary, the air outlet pipe 45 can also be connected to a vacuum pump to increase the air flow speed.

[0048] Among them, in order to facilitate the combined use of the air supply pipe 6 and the blocking seat 41, the present embodiment also provides the following technical solutions. In the solution based on the automatic filling of the filling material 5 by the conveying auger 43, a through slot 413 is provided at the edge of the blocking head 411, and a snap-fit ​​plate 62 is snap-fitted in the through slot 413. The air supply pipe 6 passes through the snap-fit ​​plate 62 and slides with the snap-fit ​​plate 62. The outside of the blocking seat 41 and other positions are provided with structures for avoiding the air supply pipe 6 to ensure the normal use of the air supply pipe 6. One end of the air supply pipe 6 located on the inner side of the product 3 is fixedly connected to a suspended support plate 61. The suspended support plate 61 slides with the hollow cavity 31, so that in actual use, the snap-fit ​​plate 62 is first snap-fitted. Onto the plugging head 411, and then control the plugging head 411 to seal the port 32 of the hollow cavity 31. At this time, the filling material 5 can be continuously input into the hollow cavity 31 through the conveying auger 43. The input filling material 5 can cause the suspended support plate 61 to slide, thereby driving the air pipe 6 to the depth of the hollow cavity 31, and the movement of the air pipe 6 and the suspended support plate 61 has a certain resistance. Therefore, the directly input filling material 5 can be more compact under the obstruction of the suspended support plate 61, avoiding the filling material 5 being too loose and difficult to suppress, thereby realizing the automatic delivery of the air pipe 6. At the same time, after the welding is completed, the air pipe 6 can be pulled to accelerate the discharge of the filling material 5 in the product 3.

[0049] For further information, please refer to the attached manual. Fig.12 The air supply system includes an air pump 63, which is connected to the air inlet end 601 of the air pipe 6 through a pipeline. The air pump 63 is respectively connected to a high-temperature air source 65 and a low-temperature air source 66 through a reversing valve 64, wherein the high-temperature air source 65 also includes a heater for heating the air, heating the air in the corresponding storage chamber for use by the air pipe 6. At the same time, the low-temperature air source 66 can directly use normal temperature air. If necessary, a cooling or refrigeration device can also be used to cool the air so as to provide relatively low temperature air for the air pipe 6.

[0050] It should be noted that before welding, the reversing valve 64 is connected to the high-temperature gas source 65, and the high-temperature air is circulated through the gas pipe 6. On the one hand, the filling material 5 and the product 3 are preheated. On the other hand, the filling material 5 will produce corresponding thermal expansion after being heated, thereby increasing the reverse support force for the product 3 and improving the support effect. When the welding is completed, low-temperature gas is introduced into the product 3. Since the filling material 5 is closer to the gas pipe 6, it can be cooled down first. After cooling, the filling material 5 shrinks and is easier to separate from the product 3. At the same time, the product 3 can also be effectively cooled down as a whole to increase the processing speed.

[0051] In the above embodiment, since the welding moving driver 12 has a large moving space when manipulating the welding gun 11 for welding, a moving space needs to be reserved at the corresponding position outside the product 3, and the fixing fixture 22 cannot be set in this area for reinforcement to avoid obstruction to the welding gun 11. For product materials with overlapping areas at the welding joint (refer to the attached manual), Fig.11 The upper left corner area has a repeated area during welding). With the support of the internal filling material 5, the repeated areas inside and outside can be closely fitted to ensure the quality of the weld. However, for some products, please refer to the attached manual. Fig.13 The welding area is only the edges of two materials in contact with each other, and there is no repeated extrusion area. Therefore, in the actual welding process, the gap between the two materials to be welded is prone to change and affect the welding quality. To this end, the present embodiment also provides the following technical solutions. Specifically, the welding device also includes an auxiliary pressing frame 7, and two groups of pressing wheels 71 are arranged on the auxiliary pressing frame 7. The two groups of pressing wheels 71 are respectively arranged corresponding to the materials on both sides of the gap to be welded on the product 3, and the pressing wheels 71 roll with the above-mentioned materials. The auxiliary pressing frame 7 moves synchronously with the welding gun 11. Specifically, the auxiliary pressing frame 7 can be directly installed on the welding mobile driver 12 (for example, on the end effector of the manipulator), so as to ensure that during welding, the auxiliary pressing frame 7 moves in front of the welding gun 11, and under the extrusion of the pressing wheel 71 on the material of the product 3, the stability and accuracy of the matching of the gap to be welded are guaranteed as much as possible.

[0052] The rotation axis of the pressing wheel 71 is set at an acute angle to the length direction line of the gap to be welded by the auxiliary pressing frame 7, that is, the pressing wheel 71 is actually set relatively inclined, and then in the process of the auxiliary pressing frame 7 moving, under the rolling cooperation of the pressing wheel 71, there is a tendency to squeeze the material to the gap to be welded (refer to the attached manual). Fig.15 When the auxiliary pressing frame 7 and the welding gun 11 move to the right, the pressing wheel 71 itself tilts downward. Therefore, under the cooperation of the pressing wheel 71 and the corresponding material of the product 3, there is a tendency to push the material upward), thereby enhancing the tightness of the gap to be welded.

[0053] For the argon arc welding technology, during the welding process, the welding gun 11 needs to continuously output high-pressure argon gas to the welding point to protect the welding area. Based on this principle, the present embodiment also provides the following technical solution: a gradient space is provided on one side of the auxiliary pressure frame 7 corresponding to the corresponding material area on the product 3, and a gradually narrowing gap is formed between the gradient space and the material of the product 3 (gradually narrowing in the direction away from the welding gun 11). When part of the argon gas enters the inner side of the auxiliary pressure frame 7, the space will gradually decrease, and the airflow intensity will be further increased, thereby effectively cleaning the welding gap to be welded and further improving the weld quality.

[0054] Refer to the instruction manual Fig.16Based on the above welding device, the present invention also provides a argon arc welding linear welding method, comprising the following steps: Step 1: Place the product 3 on the fixing seat 21, and operate the fixing fixtures 22 to squeeze and fix the outer wall of the product 3; Step 2: Adjust the posture of the product 3 and fill the filling material 5 into the product 3; Step 3: Control the plugging head 411 to plug the port 32 of the hollow cavity 31 and further apply pressure to fill the filling material 5 in the product 3 tightly and eliminate excess gaps; Step 4: adjust the product 3 to a horizontal position, and drive the welding gun 11 to move along the gap to be welded on the product 3 by the welding moving driver 12 to perform linear welding; Step 5: Control the plugging head 411 to separate from the product 3, take out the filling material 5, and weld the remaining parts of the product 3 to be welded.

[0055] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A argon arc welding linear welding device, comprising an argon arc welding assembly (1) and a product fixing assembly (2), wherein the argon arc welding assembly (1) comprises a welding gun (11) and a welding moving driver (12), and the product fixing assembly (2) comprises a fixing seat (21), and the fixing seat (21) is provided with a plurality of fixing fixtures (22) for squeezing and fixing the outer wall of a product (3), characterized in that: The interior of the hollow cavity (31) of the product (3) is filled with a filling material (5), and a sealing and pressurizing component (4) is provided at the port (32) of the hollow cavity (31) at the bottom of the fixing seat (21); The blocking pressurizing assembly (4) comprises a blocking seat (41) and a blocking moving driver (42); the blocking seat (41) is slidably arranged on the fixing seat (21); one end of the blocking seat (41) corresponding to the product (3) is provided with a blocking head (411) which is engaged with the port (32); the blocking moving driver (42) is used to drive the blocking seat (41) to move and enable the blocking head (411) to block the port (32) of the hollow cavity (31); The filling material (5) is a spherical particle structure, and the (5) is a rigid heat-conducting structure.

2. The argon arc welding linear welding device according to claim 1, characterized in that: A feeding cavity (412) is provided at a position of the blocking seat (41) corresponding to the hollow cavity (31), a conveying auger (43) is rotatably installed in the feeding cavity (412), and the conveying auger (43) is driven to rotate by a rotating drive device. A feeding pipe (44) is also provided on the blocking seat (41), and the feeding pipe (44) is communicated with the feeding cavity (412), and the feeding pipe (44) is connected to a hopper for storing the filling material (5).

3. The argon arc welding linear welding device according to claim 2, characterized in that: The welding device further comprises an air supply pipe (6), the air supply pipe (6) being filled and arranged in the product (3), the air supply pipe (6) penetrating the plugging head (411), the air supply pipe (6) extending to an end of the hollow cavity (31) away from the plugging pressurizing assembly (4), the plugging head (411) being provided with an air outlet pipe (45) communicating with the inside and outside, the air supply pipe (6) being connected to an air supply system, the air supply system being used to enable the air supply pipe (6) to blow out airflow inside the hollow cavity (31).

4. The argon arc welding linear welding device according to claim 3, characterized in that: The gas supply system comprises an air delivery pump (63), the air delivery pump (63) being in communication with the air delivery pipe (6) via a pipeline, the air delivery pump (63) being respectively connected to a high-temperature air source (65) and a low-temperature air source (66) via a reversing valve (64), and the air outlet pipe (45) being connected to an air extraction pump.

5. The argon arc welding linear welding device according to claim 4, characterized in that: A through-slot (413) is provided at the edge of the plugging head (411), a clamping plate (62) is clamped and installed in the through-slot (413), and the air delivery pipe (6) penetrates the clamping plate (62) and is slidably engaged with the clamping plate (62).

6. The argon arc welding linear welding device according to claim 5, characterized in that: The product fixing assembly (2) further comprises a support frame (23), the fixing seat (21) is rotatably mounted on the support frame (23), and a first rotation driver (211) is provided on the support frame (23), the first rotation driver (211) being used to drive the fixing seat (21) to flip and rotate, and the rotation direction of the fixing seat (21) relative to the support frame (23) is arranged parallel to the length direction of the product (3).

7. The argon arc welding linear welding device according to claim 6, characterized in that: The welding mobile driver (12) is used to drive the welding gun (11) to move along a welding track. The welding mobile driver (12) is a manipulator structure. The supporting frame (23) comprises a base frame (231) and a flip frame (232). The flip frame (232) is rotatably mounted on the base frame (231). A second rotation driver (233) is provided on the base frame (231). The second rotation driver (233) is used to drive the flip frame (232) to rotate. The rotation direction of the flip frame (232) is perpendicular to the rotation direction of the fixed seat (21).

8. The argon arc welding linear welding device according to claim 7, characterized in that: The welding device further comprises an auxiliary pressing frame (7), on which two groups of pressing wheels (71) are arranged, the two groups of pressing wheels (71) being arranged corresponding to the materials on both sides of the gap to be welded on the product (3), respectively, and the pressing wheels (71) rollingly cooperate with the above-mentioned materials, and the auxiliary pressing frame (7) moves synchronously with the welding gun (11).

9. The argon arc welding linear welding device according to claim 8, characterized in that: The rotation axis of the pressing wheel (71) is arranged at an acute angle to the length direction line of the gap to be welded of the auxiliary pressing frame (7); a gradient space is arranged on one side of the auxiliary pressing frame (7) corresponding to the corresponding material area on the product (3); a gap that gradually narrows in a direction away from the welding gun (11) is formed between the gradient space and the material of the product (3).

10. A welding method using the argon arc welding linear welding device as claimed in claim 9, characterized in that: The following steps are involved: Step 1: placing the product (3) on the fixing seat (21), and operating each fixing fixture (22) to squeeze and fix the outer wall of the product (3); Step 2: adjusting the posture of the product (3) and filling the filling material (5) into the product (3); Step 3: controlling the plugging head (411) to plug the port (32) of the hollow cavity (31) and further applying pressure; Step 4: adjust the product (3) to a horizontal position, and drive the welding gun (11) to move along the gap to be welded on the product (3) through the welding moving driver (12) to perform linear welding; Step 5: Control the plugging head (411) to separate from the product (3), take out the filling material (5), and weld the remaining parts of the product (3) to be welded.

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