Auxiliary end cover welding device for air cylinder machining

Abstract

The invention relates to an end cover auxiliary welding device for air cylinder machining, and relates to the technical field of air cylinder welding, the end cover auxiliary welding device for air cylinder machining comprises a vertically-arranged rack and a workbench arranged on the rack, and the workbench is provided with a fixing assembly for fixing a workpiece to be welded; the rack is further provided with an inner welding assembly for conducting inner welding on a workpiece and an outer welding assembly for conducting outer welding on the workpiece. The outer welding assembly comprises an outer welding head rotationally arranged on the rack and a first rotating part for rotationally driving the outer welding head, the outer welding head is arranged towards the splicing position of the to-be-welded workpiece, and the rotating axis of the outer welding head is consistent with the axis of the to-be-welded workpiece; the inner welding assembly is rotationally arranged on an inner welding head on the rack and a second rotating piece for driving the inner welding head to rotate. The welding device has the effects that the inner side and the outer side of the splicing position of the cylinder body and the end socket of the large air cylinder can be synchronously welded, and the welding efficiency is improved.

Description

Technical Field

[0001] This application relates to the technical field of air storage tank welding equipment, and particularly relates to an end cover auxiliary welding device for air storage tank processing. Background Art

[0002] An air storage tank is a cylindrical container used to store compressed gas generated by an air compressor or other gas compression equipment, and can be used in systems such as vehicle braking and horn sounding.

[0003] A common air storage tank is a cylindrical shape with both ends closed. When producing an air storage tank, the sheet material needs to be first bent into a cylindrical shape to form a cylinder body, and then a metal plate cut into a circular plate shape, that is, a head, is spliced with the cylinder body, and then the splicing part is welded to form a cylindrical air storage tank.

[0004] When splicing and welding the cylinder body and the head, technicians usually adopt the method of pre-welding - welding, that is, first keep the head and the cylinder body coaxial and then perform spot welding. After welding multiple welding points to fix the position of the cylinder body and the head, then use a laser welding device for welding. Common equipment for laser welding of air storage tanks includes a workbench for placing the workpiece to be welded, a welding head provided on the workbench, and a pressing wheel provided on the workbench and fitting against the outer side of the cylinder body. The pressing wheel presses against the cylinder body and rotates under the drive of a power source, so that the welding head aligns with the splicing part for welding.

[0005] However, in the actual welding process, when the size of the air storage tank itself is large, only welding the outside cannot meet the requirements of the airtightness of large storage tanks. It is necessary to synchronously weld the splicing parts on both the inside and outside of the air storage tank. Usually, a step-by-step welding process is adopted for welding the inside and outside of the air storage tank, and the welding cycle is long and the efficiency is low. Summary of the Invention

[0006] In order to facilitate the synchronous welding of the splicing parts on both the inside and outside of the cylinder body and the head of a large air storage tank and improve the welding efficiency, this application provides an end cover auxiliary welding device for air storage tank processing.

[0007] The end cover auxiliary welding device for air storage tank processing provided by this application adopts the following technical solutions: An end cover auxiliary welding device for air storage tank processing includes a vertically arranged frame and a workbench provided on the frame. The workbench is provided with a fixing component for fixing the workpiece to be welded, and the frame is also provided with an internal welding component for welding the inside of the workpiece and an external welding component for welding the outside. The external welding assembly includes an external welding head rotatably arranged on the frame and a first rotating member for rotating the external welding head, the external welding head is arranged toward the joint of the workpieces to be welded, and the rotation axis of the external welding head is consistent with the axis of the workpieces to be welded; The internal welding assembly rotatably arranges an internal welding head on the frame and a second rotating member for rotating the internal welding head, wherein the internal welding head is movably located in the workpiece to be welded and arranged toward the joint of the workpiece to be welded; The rotation directions of the inner welding head and the outer welding head are consistent, and the distance between the corresponding points of the inner welding head and the workpiece to be welded and the corresponding points of the inner welding head and the workpiece to be welded is the diameter of the head, and the rotation directions of the inner welding head and the outer welding head are consistent, and the frame is also provided with a synchronous moving part for synchronously driving the first rotating part and the second rotating part.

[0008] By adopting the above technical solution, when welding the cylinder and the head, the technicians first align the head and the cylinder and then pre-weld and fix them. Then, the technicians place the pre-welded and fixed gas cylinder on the workbench, and then fix the parts to be welded through the fixing assembly. At this time, the outer welding head is arranged toward the joint of the parts to be welded. Then, the technicians extend the inner welding head into the cylinder through a second rotation, so that the inner welding head is arranged toward the joint on the inner side of the parts to be welded.

[0009] Then, the first rotating member and the second rotating member are driven by the arranged synchronous member, so that the first rotating member drives the external welding head to rotate, and the external welding head rotates around the axis of the welded parts toward the joint, so as to realize welding of the joint of the welded parts.

[0010] At the same time, the second rotating member drives the inner welding joint to rotate, so that the inner welding joint faces the joint and is welded around the inner joint of the inner welding joint.

[0011] Through the above arrangement, the conventional method of driving the workpiece to be welded to rotate is modified to the method of driving the welding head to rotate. When the conventional clamping wheel rotates in contact with the surface of the workpiece to be welded, it is easy to produce welding quality deviation due to the influence of the surface flatness of the workpiece to be welded. When the surface of the cylinder is uneven or the surface of the clamping wheel is uneven, the uniformity of the welding quality at the joint between the head and the cylinder is improved. At the same time, through the above-mentioned arrangement, the inner welding joint and the outer welding joint are always located at the two ends of the head diameter, thereby reducing the problem of weld penetration caused by welding the inner welding joint and the outer welding joint at the same point, further improving the welding quality, and utilizing the thermal conductivity of the metal material itself, the welded part of the inner welding joint is preheated in advance when the outer welding joint passes by, and the welded part of the outer welding joint is preheated in advance when the inner welding joint passes by, thereby reducing the time wasted in advance preheating.

[0012] Optionally, the first rotating member includes a first rotating rod rotatably disposed on the frame and a second rotating rod rotatably disposed on the first rotating rod. The outer welding head is disposed on the second rotating rod. The second rotating rod is in transmission connection with the first rotating rod, and the rotation speed of the second rotating rod is associated with the thickness of the workpiece to be welded. The frame is further provided with a thickness measuring member for detecting the thickness of the head.

[0013] By adopting the above technical solution, the thickness of the head is detected by setting the thickness measuring member. Since the weld depth and thickness are inconsistent according to the thickness of different heads, for a thicker head, the weld depth to be welded is deeper and the welding thickness is thicker to ensure the airtightness of the air storage cylinder. Therefore, the welding speed is slower. For a thinner head, the weld depth to be welded is shallower and the welding thickness is thinner to reduce the risk of burn-through. Therefore, the rotation speed needs to be adjusted according to the actual thickness, so as to adjust the welding thickness and welding depth according to the actual thickness during welding.

[0014] Optionally, the second rotating member includes a first adjusting rod slidably disposed on the frame. A second adjusting rod is rotatably disposed on the first adjusting rod. The second adjusting rod is in transmission connection with the first adjusting rod. The synchronizing member is used to transmit the first adjusting rod and the first rotating rod in connection.

[0015] By adopting the above technical solution, under the action of the synchronizing member, the first adjusting rod is in transmission connection with the first rotating rod, so that the inner welding head and the outer welding head rotate synchronously in the same direction, thereby realizing the internal and external synchronous welding of the splicing part of the cylinder head. Under the action of the synchronizing member, the inner welding head and the outer welding head rotate synchronously, so as to always be staggered, reducing the temperature concentration caused by the inner welding head and the outer welding head welding the same point, and reducing the situations of burn-through and complete penetration.

[0016] Optionally, the thickness measuring member includes a first pressing block disposed on the first adjusting rod and a second pressing block disposed on the first rotating rod. The first pressing block is in contact with the inner side wall of the head, and the second pressing block is in contact with the outer side wall of the head. The first pressing block and the second pressing block are always arranged oppositely.

[0017] By adopting the above technical solution, when welding the end cover and the cylinder body, the first pressing block and the second pressing block are arranged to press the center of the end cover, so that the rotation centers of the inner welding joint and the outer welding joint are always consistent with the axis of the end cover, thereby improving the accuracy of the inner welding and the outer welding. At the same time, by arranging elastic balls at the centers of the first pressing block and the second pressing block, when the first adjusting rod and the first rotating rod rotate to drive the first pressing block and the second pressing block to rotate, the resistance between the first pressing block, the second pressing block and the end cover is reduced, thereby reducing the welding accuracy problem caused by the rotation of the cylinder body and the end cover.

[0018] Optionally, both the second rotating rod and the second adjusting rod are of adjustable length, and both the second rotating rod and the second adjusting rod are provided with fitting blocks. The fitting block on the second rotating rod fits with the outer peripheral wall of the cylinder body, and the fitting block on the second adjusting rod fits with the inner peripheral wall of the cylinder body. Angle adjusting members for adjusting the angles of the inner welding joint / outer welding joint according to the diameter of the cylinder body are provided on both the second rotating rod and the second adjusting rod.

[0019] By adopting the above technical solution, for gas storage cylinders of different sizes, the sizes of their cylinder bodies and end covers are also inconsistent. When welding gas storage cylinders of different diameters, the larger the diameter of the gas storage cylinder, the higher the airtightness requirement, so the welding area and welding depth requirements are high, and thus the groove angles opened on the end cover are also inconsistent. Therefore, when welding gas storage cylinders of different diameters, the welding angles of the inner welding joint and the outer welding joint also need to change with the change of the diameter.

[0020] By adopting the above technical solution, the second rotating rod and the second adjusting rod are set to be of adjustable length, and through the provided angle adjusting members, while adjusting the lengths of the second rotating rod and the second adjusting rod, the angles of the inner welding joint and the outer welding joint are adjusted, so as to realize welding with different welding depths and welding areas for gas storage cylinders of different diameters, so as to meet the sealing requirements of gas storage cylinders of different diameters.

[0021] Optionally, the angle adjusting member includes a telescopic rod slidably arranged on the second rotating rod / second adjusting rod. The fitting block is arranged on the side wall of the telescopic rod away from the second rotating rod / second adjusting rod. Accommodation grooves are opened on both the second rotating rod and the second adjusting rod. One end of the telescopic rod close to the second rotating rod / second adjusting rod is slidably arranged in the accommodation groove. The inner welding joint / outer welding joint is rotatably arranged at one end of the telescopic rod close to the end cover.

[0022] By adopting the above technical solution, when welding cylinders with different diameters, relevant technicians adjust the length of the telescopic rod at this time, so that the telescopic rod extends out of the receiving groove until the fitting block fits against the outer wall / inner wall of the cylinder, so that the inner welding head / outer welding head faces the splicing part of the cylinder and the end cover, realizing the welding of the splicing part.

[0023] Optionally, the angle adjusting member further includes a linear driving member provided on the second rotating rod / second adjusting rod, the output end of the linear driving member is connected to the telescopic rod, and a rotating driving member is provided at the rotational connection of the inner welding head / outer welding head and the telescopic rod. A length displacement sensor is provided on the telescopic rod near the second rotating rod / second adjusting rod, and a radian displacement sensor is provided at the rotational connection of the telescopic rod and the inner welding head / outer welding head. A controller is further provided on the frame, and the length displacement sensor, the linear driving member, the radian displacement sensor, and the rotating driving member are all electrically connected to the controller.

[0024] By adopting the above technical solution, the controller controls the linear driving member to drive the telescopic rod to slide along the length direction of the second rotating rod / second adjusting rod until the fitting block fits against the inner side wall / outer side wall of the cylinder, and controls the rotating driving member to work and rotate according to the reading of the length displacement sensor, thereby driving the inner welding head / outer welding head to rotate until the reading of the radian displacement sensor matches the reading of the length displacement sensor, so as to realize the change of the angle of the inner welding head / outer welding head during the processing of gas storage cylinders with different diameters and achieve precise welding.

[0025] Optionally, the angle adjusting member further includes a plugging block connected to the telescopic rod, the plugging block fits against the inner wall of the receiving groove, an adjusting gear is rotatably provided at the rotating shaft of the inner welding head / outer welding head on the telescopic rod, an adjusting rack is provided inside the telescopic rod, the adjusting rack meshes with the adjusting gear, and an accommodating cavity is provided inside the telescopic rod. A pressing block is provided on the side of the telescopic rack away from the inner welding head / outer welding head, the pressing block fits against the inner wall of the accommodating cavity, and a connecting pipe is communicated between the accommodating cavity and the receiving groove. A displacement driving member for slidingly driving the telescopic rod is further provided on the second adjusting rod / second rotating rod, and an anti-rust member for performing anti-rust treatment on the weld is further provided on the telescopic rod.

[0026] By adopting the above technical solution, when directly adjusting the angles of the inner and outer welding heads by means of motors and sensors, it is necessary to consider the layout and wiring of the two power sources and sensors, and relevant technicians need to have corresponding operating levels to adjust different parameters for gas storage cylinders with different diameters, so as to realize the adjustment of the corresponding angles of the inner and outer welding heads. The operation difficulty is relatively high, and the labor cost and equipment cost are relatively high when using multiple power sources.

[0027] By setting a displacement driving member to drive the plugging block to slide in the receiving groove, since the receiving groove, the receiving cavity, the abutting block and the plugging block form a sealed space, when the plugging block slides in a direction away from the first adjusting rod / the first rotating rod, the space in the receiving groove increases at this time, thereby driving the pressure in the receiving cavity to decrease, so that the abutting block drives the adjusting rack to slide in a direction away from the end cover. At this time, the adjusting rack drives the adjusting gear to rotate, making the relative rotation angle of the inner welding joint / the outer welding joint in the horizontal direction larger, thus facilitating the welding of a cylinder with a large diameter and a large groove.

[0028] When the plugging block slides in a direction close to the first adjusting rod / the first rotating rod, the space in the receiving groove decreases at this time, so that the pressure in the receiving cavity increases, making the abutting block drive the adjusting rack to slide in a direction close to the end cover, so that the relative rotation angle of the inner welding joint / the outer welding joint in the horizontal direction decreases, thus facilitating the welding of a cylinder with a small diameter and a small groove.

[0029] By adopting the above technical solution, no additional control operation is required, the input of the power source is reduced, and at the same time, the wiring of the controller, the sensor and the additional power source is reduced, thereby reducing problems such as winding and jamming generated during the working process and improving the stability of welding.

[0030] At the same time, through the anti-rust member provided, the anti-rust treatment is carried out on the weld during the welding process, reducing the problem that the weld appears an oxide layer due to untimely anti-rust treatment, affecting the weld quality, thereby further improving the sealing performance of the weld.

[0031] Optionally, the displacement driving member includes a rotating gear rotatably provided on the second adjusting rod / the second rotating rod, and a tooth groove is formed on the side wall of the telescopic rod, and the rotating gear meshes with the tooth groove.

[0032] By setting the displacement driving member in the form of a rotating gear and a tooth groove, the displacement amount of the telescopic rod is adjusted by controlling the number of tooth grooves for the telescopic rod to rise, so as to realize the precise adjustment of the displacement amount of the telescopic rod. Relevant technicians can precisely control the stroke of the telescopic rod by observing the number of tooth grooves, thereby reducing the operation difficulty of relevant technicians, lowering the operation threshold, and improving the adaptability of the welding device.

[0033] Optionally, the rust prevention member includes a rust prevention head disposed on the side of the telescopic rod close to the end cover. The rust prevention head is disposed on one side of the inner welding head / outer welding head, and the rust prevention head is arranged facing the joint of the cylinder body and the end cover. Liquid storage tanks are provided on both the first rotating rod and the first adjusting rod. The liquid storage tanks are communicated with the rust prevention head, and the width of the cavity on the side of the liquid storage tank close to the end cover is greater than the width of the cavity on the side away from the end cover. A coating plate is slidably arranged in the liquid storage tank, and the coating plate is attached to the inner wall of the liquid storage tank. A communication hole is opened on the side of the liquid storage tank close to the end cover. There are multiple communication holes, and the multiple communication holes are arranged along the circumference of the liquid storage tank. An opening member for opening and closing the opening of the rust prevention head is further provided on the rust prevention head.

[0034] By adopting the above technical solution, the provided rust prevention head coats the weld during the welding of the joint. Since the liquid storage tanks are arranged on the first rotating rod and the first adjusting rod, during the rotation of the first rotating rod and the first adjusting rod, the liquid flows towards the lower place, so that there is always a liquid height covering the height of the communication holes at the multiple communication holes. Thus, during the sliding of the coating plate, the rust prevention liquid in the liquid storage tank is extruded and sprayed onto the weld for rust prevention treatment, realizing timely rust prevention, reducing the problem of the generation of an oxide layer and then rust at the weld, and improving the weld quality and the service life of the air storage cylinder.

[0035] In summary, the present application includes at least one of the following beneficial technical effects: 1. By providing the first rotating rod, the first adjusting rod, the inner welding head and the outer welding head, the cylinder body and the end cover are welded, and the joint of the cylinder body and the end cover is welded synchronously inside and outside. While improving the welding efficiency, the problem of welding through generated when the inner and outer welding points are at the same point is reduced, and the welding quality is improved. At the same time, the welding part of the inner welding head preheats the part to be welded by the outer welding head, further improving the welding quality; 2. By providing the second rotating rod, the second adjusting rod and the telescopic rod, when welding air storage cylinders with different diameters, by adjusting the length of the telescopic rod, the angles of the inner welding head and the outer welding head are adjusted as the length of the telescopic rod is adjusted, so as to weld air storage cylinders with different diameters and welding seams with different grooves, improving the adaptability of the device; BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 is the overall structural schematic diagram of Embodiment 1 of the present application; Figure 2 is the overall structural schematic diagram after hiding the cylinder body and the end cover; Figure 3 is the connection structural schematic diagram of the inner welding assembly and the outer welding assembly; Figure 4It is a schematic diagram of the connection structure between the inner welding component and the outer welding component from another perspective; Figure 5 It is a schematic diagram of the connection structure between the anti-rust screw rod and the liquid storage tank.

[0037] Reference numerals: 1, frame; 11, workbench; 12, cylinder body; 13, end cover; 2, inner welding component; 21, inner welding head; 22, first rotating rod; 23, second rotating rod; 24, first abutting block; 3, outer welding component; 31, first adjusting rod; 32, second adjusting rod; 33, outer welding head; 34, second abutting block; 35, elastic ball; 4, angle adjusting component; 41, telescopic rod; 42, receiving groove; 44, linear driving component; 45, rotational driving component; 46, linear displacement sensor; 47, arc displacement sensor; 48, controller; 51, adjusting gear; 52, adjusting rack; 53, abutting block; 54, connecting pipe; 55, rotating gear; 56, tooth groove; 6, anti-rust component; 61, anti-rust head; 62, liquid storage tank; 63, coating plate; 64, communication hole; 65, anti-rust screw rod; 66, opening component; 661, blocking block; 662, adjusting cavity; 663, temperature-sensitive balloon. Detailed implementation manners

[0038] The following further Figures 1-5 describes the present application in detail.

[0039] Embodiment 1

[0040] The embodiment of the present application discloses an auxiliary welding device for the end cover 13 in the processing of an air storage cylinder. Refer to Figure 1 and Figure 2 , an auxiliary welding device for the end cover 13 in the processing of an air storage cylinder includes a vertically arranged frame 1 and a workbench 11 arranged on the frame 1. A fixing component for fixing the workpiece to be welded is arranged on the workbench 11, and an inner welding component 2 for internally welding the workpiece and an outer welding component 3 for externally welding are further arranged on the frame 1; The outer welding component 3 includes an outer welding head 33 rotatably arranged on the frame 1 and a first rotating member for rotatably driving the outer welding head 33. The outer welding head 33 is arranged towards the splicing part of the workpiece to be welded, and the rotation axis of the outer welding head 33 is consistent with the axis of the workpiece to be welded; The inner welding component 2 includes an inner welding head 21 rotatably arranged on the frame 1 and a second rotating member for rotatably driving the inner welding head 21. The inner welding head 21 is movably located inside the workpiece to be welded and is arranged towards the splicing part of the workpiece to be welded; The rotation directions of the inner welding joint 21 and the outer welding joint 33 are the same, and the distance between the corresponding points at the splicing of the inner welding joint 21 and the workpiece to be welded and the corresponding points of the inner welding joint 21 and the workpiece to be welded is the diameter of the head. The frame 1 is also provided with a synchronous member for synchronously driving the first rotating member and the second rotating member.

[0041] Refer to Figure 3 、 Figure 4 and Figure 5 As shown in FIGS. and, the first rotating member includes a first rotating rod 22 rotatably arranged on the frame 1 and a second rotating rod 23 arranged on the first rotating rod 22. The outer welding joint 33 is arranged on the second rotating rod 23. The extending direction of the second rotating rod 23 is consistent with the radial direction of the cylinder body 12. The frame 1 is also provided with a thickness measuring member for detecting the thickness of the head. The second rotating member includes a first adjusting rod 31 slidably arranged on the frame 1 and a second adjusting rod 32 arranged on the first adjusting rod 31. The inner welding joint 21 is arranged at the end side of the second adjusting rod 32. The second adjusting rod 32 is consistent with the radial direction of the cylinder body 12.

[0042] The thickness measuring member includes a first pressing block 24 arranged on the first adjusting rod 31 and a second pressing block 34 arranged on the first rotating rod 22. The first pressing block 24 is attached to the inner side wall of the head, and the second pressing block 34 is attached to the outer side wall of the head. The first pressing block 24 and the second pressing block 34 are always arranged opposite to each other. Elastic balls 35 are arranged at the centers of the first pressing block 24 and the second pressing block 34, and the elastic balls 35 are attached to and pressed against the center of the end cover 13.

[0043] Both the second rotating rod 23 and the second adjusting rod 32 are of adjustable length, and fitting blocks are arranged on both the second rotating rod 23 and the second adjusting rod 32. The fitting block on the second rotating rod 23 is attached to the outer peripheral wall of the cylinder body 12, and the fitting block on the second adjusting rod 32 is attached to the inner peripheral wall of the cylinder body 12. Angle adjusting members 4 for adjusting the angles of the inner welding joint 21 / outer welding joint 33 according to the diameter of the cylinder body 12 are arranged on both the second rotating rod 23 and the second adjusting rod 32.

[0044] The angle adjusting member 4 includes a telescopic rod 41 slidably arranged on the second rotating rod 23 / second adjusting rod 32. The fitting block is arranged on the side wall of the telescopic rod 41 away from the second rotating rod 23 / second adjusting rod 32. Accommodation grooves 42 are formed on both the second rotating rod 23 and the second adjusting rod 32. One end of the telescopic rod 41 close to the second rotating rod 23 / second adjusting rod 32 is slidably arranged in the accommodation groove 42. The inner welding joint 21 / outer welding joint 33 is rotatably arranged at one end of the telescopic rod 41 close to the end cover 13.

[0045] The angle adjusting member 4 further includes a linear driving member 44 provided on the second rotating rod 23 / the second adjusting rod 32. The output end of the linear driving member 44 is connected to the telescopic rod 41. A rotational driving member 45 is provided at the rotational connection between the inner welding joint 21 / the outer welding joint 33 and the telescopic rod 41. A length displacement sensor 46 is provided on the telescopic rod 41 near the second rotating rod 23 / the second adjusting rod 32. A radian displacement sensor 47 is provided at the rotational connection of the telescopic rod 41 with the inner welding joint 21 / the outer welding joint 33. A controller 48 is further provided on the frame 1. The length displacement sensor 46, the linear driving member 44, the radian displacement sensor 47, and the rotational driving member 45 are all electrically connected to the controller.

[0046] An anti-rust member 6 for rust prevention treatment of the weld seam is further provided on the telescopic rod 41. The anti-rust member 6 includes an anti-rust head 61 provided on the telescopic rod 41 near one side of the end cover 13. The anti-rust head 61 is provided on one side of the inner welding joint 21 / the outer welding joint 33, and the anti-rust head 61 is arranged facing the joint of the cylinder body 12 and the end cover 13. Liquid storage tanks 62 are provided on both the first rotating rod 22 and the first adjusting rod 31. The liquid storage tanks 62 are communicated with the anti-rust head 61. And the cavity width of the liquid storage tank 62 near the end cover 13 is greater than the cavity width of the side far from the end cover 13. A coating plate 63 is slidably arranged in the liquid storage tank 62. The coating plate 63 fits against the inner wall of the liquid storage tank 62. A communication hole 64 is opened on one side of the liquid storage tank 62 near the end cover 13. There are multiple communication holes 64, and the multiple communication holes 64 are arranged along the circumference of the liquid storage tank 62. An opening member 66 for opening and closing the opening of the anti-rust head 61 is further provided on the anti-rust head 61.

[0047] In this application, in order to realize the coating of the anti-rust oil in the anti-rust head 61, anti-rust lead screws 65 are rotatably arranged in both the first rotating rod 22 and the first adjusting rod 31. The anti-rust lead screws 65 are rotatably arranged in the first rotating rod 22 / the first adjusting rod 31. A first pressing block 24 is rotatably connected to the end side of the first rotating rod 22 near the first adjusting rod 31. A second pressing block 34 is rotatably connected to the end side of the first adjusting rod 31 near the first rotating rod 22. The first pressing block 24 fits against the inner side wall of the head. The second pressing block 34 fits against the outer side wall of the head. And the first pressing block 24 is fixedly connected to the anti-rust lead screw 65 in the first adjusting rod 31. The second pressing block 34 is fixedly connected to the anti-rust lead screw 65 in the first rotating rod 22. And the coating plates 63 in the two liquid storage tanks 62 are threadedly adapted to the anti-rust lead screws 65 on the corresponding first adjusting rod 31 / the first rotating rod 22.

[0048] Thus, when welding the air storage cylinder and the end cover, since the first adjusting rod 31 and the first rotating rod 22 rotate relative to the air storage cylinder at this time, the first pressing block 24 and the second pressing block 34 are both in contact with the end cover, and the end cover does not rotate at this time, so that the first pressing block 24 and the second pressing block 34 do not rotate. At this time, the anti-rust screw rod 65 rotates relative to the first adjusting rod 31 / the first rotating rod 22, so that the coating plate 63 slides in the liquid storage tank 62 in the direction towards the anti-rust head 61, squeezing out the anti-rust oil in the liquid storage tank 62 to perform anti-rust treatment on the weld.

[0049] At the same time, an adjusting cavity 662 is provided in the anti-rust head 61, and a blocking block 661 is slidably arranged in the anti-rust head 61. A communication hole is opened on the blocking block 661, and the communication hole is movably communicated with the adjusting cavity 662. A temperature-sensitive balloon 663 is also provided in the anti-rust head 61. The temperature-sensitive balloon 663 is in contact with and presses against the blocking block 661, and a liquid made of a temperature-sensitive material is contained in the temperature-sensitive balloon 663. In this application, the liquid made of the temperature-sensitive material is one of ether, acetone, etc. When high temperature is generated during welding, the liquid in the temperature-sensitive balloon 663 vaporizes, so that the temperature-sensitive balloon 663 expands, and then the blocking block 661 slides to a position where the communication hole is communicated with the adjusting cavity 662. At this time, the anti-rust oil can be sprayed out from the anti-rust head 61 to realize the anti-rust operation on the welding part.

[0050] Embodiment 2

[0051] The difference between the embodiment of this application and Embodiment 1 is that: the angle adjusting member 4 further includes a blocking block connected to the telescopic rod 41. The blocking block is in contact with the inner wall of the accommodating groove 42. The telescopic rod 41 is rotatably provided with an adjusting gear 51 at the rotating shaft of the inner welding head 21 / the outer welding head 33. An adjusting rack 52 is provided in the telescopic rod 41. The adjusting rack 52 meshes with the adjusting gear 51. And an accommodating cavity is provided in the telescopic rod 41. A butting block 53 is provided on the side of the telescopic rack away from the inner welding head 21 / the outer welding head 33. The butting block 53 is in contact with the inner wall of the accommodating cavity. And a connecting pipe 54 is communicated between the accommodating cavity and the accommodating groove 42. A displacement driving member for slidingly driving the telescopic rod 41 is further provided on the second adjusting rod 32 / the second rotating rod 23. The displacement driving member includes a rotating gear 55 rotatably provided on the second adjusting rod 32 / the second rotating rod 23. A tooth groove 56 is opened on the side wall of the telescopic rod 41. The rotating gear 55 meshes with the tooth groove 56.

[0052] The above are all the preferred embodiments of this application, and the protection scope of this application is not limited accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of this application should be covered within the protection scope of this application.

Claims

1. An auxiliary welding device for an end cover (13) for processing a gas storage cylinder, comprising a vertically arranged frame (1) and a workbench (11) arranged on the frame (1), characterized in that: The workbench (11) is provided with a fixing assembly for fixing a workpiece to be welded, and the frame (1) is also provided with an internal welding assembly (2) for internal welding of the workpiece and an external welding assembly (3) for external welding; The external welding assembly (3) comprises an external welding head (33) rotatably arranged on the frame (1) and a first rotating member for driving the external welding head (33) to rotate, the external welding head (33) being arranged toward a joint of workpieces to be welded, and a rotation axis of the external welding head (33) being consistent with an axis of the workpieces to be welded; The internal welding assembly (2) rotatably arranges an internal welding head (21) on the frame (1) and a second rotating member for driving the internal welding head (21) to rotate, wherein the internal welding head (21) is movably located inside the workpiece to be welded and arranged toward a joint of the workpiece to be welded; The inner welding joint (21) and the outer welding joint (33) rotate in the same direction, and the distance between the corresponding point at which the inner welding joint (21) and the workpiece to be welded are connected and the distance between the corresponding point of the inner welding joint (21) and the workpiece to be welded is the diameter of the head, and the inner welding joint (21) and the outer welding joint (33) rotate in the same direction, and the first rotating member and the second rotating member rotate synchronously.

2. The auxiliary welding device for an end cover (13) for processing a gas storage cylinder according to claim 1, characterized in that: The first rotating member comprises a first rotating rod (22) rotatably arranged on the frame (1) and a second rotating rod (23) arranged on the first rotating rod (22); the external welding joint (33) is arranged on the second rotating rod (23); the extension direction of the second rotating rod (23) is consistent with the radial direction of the cylinder (12); and the frame (1) is also provided with a thickness member for detecting the thickness of the end cap; The second rotating member comprises a first adjusting rod (31) slidably arranged on the frame (1) and a second adjusting rod (32) arranged on the first adjusting rod (31), the inner welding joint (21) being arranged on the end side of the second adjusting rod (32), and the second adjusting rod (32) is consistent with the radial direction of the cylinder (12).

3. The auxiliary welding device for an end cover (13) for processing a gas storage cylinder according to claim 2, characterized in that: The thickness member comprises a first pressing block (24) provided on the first adjusting rod (31) and a second pressing block (34) provided on the first rotating rod (22); the first pressing block (24) is in contact with the inner wall of the end cap, and the second pressing block (34) is in contact with the outer wall of the end cap; the first pressing block (24) and the second pressing block (34) are always arranged opposite to each other; elastic balls (35) are provided at the centers of the first pressing block (24) and the second pressing block (34); the elastic balls (35) are in contact with the center of the end cap (13).

4. The auxiliary welding device for an end cover (13) for processing a gas storage cylinder according to claim 3, characterized in that: The second rotating rod (23) and the second adjusting rod (32) are both of adjustable length, and are provided with fitting blocks, the fitting blocks on the second rotating rod (23) fit with the outer peripheral wall of the cylinder (12), and the fitting blocks on the second adjusting rod (32) fit with the inner peripheral wall of the cylinder (12), and the second rotating rod (23) and the second adjusting rod (32) are provided with angle adjustment members (4) for adjusting the angle of the inner welding joint (21) / outer welding joint (33) according to the diameter of the cylinder (12).

5. The auxiliary welding device for an end cover (13) for processing a gas storage cylinder according to claim 4, characterized in that: The angle adjustment member (4) comprises a telescopic rod (41) slidably arranged on the second rotating rod (23) / the second adjusting rod (32); the fitting block is arranged on a side wall of the telescopic rod (41) away from the second rotating rod (23) / the second adjusting rod (32); the second rotating rod (23) and the second adjusting rod (32) are both provided with a receiving groove (42); one end of the telescopic rod (41) close to the second rotating rod (23) / the second adjusting rod (32) is slidably arranged in the receiving groove (42); and the inner welding head (21) / the outer welding head (33) is rotatably arranged on one end of the telescopic rod (41) close to the end cover (13).

6. The auxiliary welding device for an end cover (13) for processing a gas storage cylinder according to claim 5, characterized in that: The angle adjustment member (4) further comprises a linear drive member (44) arranged on the second rotating rod (23) / second adjusting rod (32); an output end of the linear drive member (44) is connected to the telescopic rod (41); a rotation drive member (45) is provided at a rotation connection between the inner welding joint (21) / outer welding joint (33) and the telescopic rod (41); a length displacement sensor (46) is provided on the telescopic rod (41) near the second rotating rod (23) / second adjusting rod (32); an arc displacement sensor (47) is provided on the telescopic rod (41) at a rotation connection between the inner welding joint (21) / outer welding joint (33); a controller (48) is further provided on the frame (1); and the length displacement sensor (46), the linear drive member (44), the arc displacement sensor (47) and the rotation drive member (45) are all electrically connected to the controller (48).

7. The auxiliary welding device for an end cover (13) for processing a gas storage cylinder according to claim 5, characterized in that: The angle adjustment member (4) further comprises a blocking block (661) connected to the telescopic rod (41), the blocking block (661) being in contact with the inner wall of the receiving groove (42), the telescopic rod (41) being rotatable at the rotating shaft of the inner welding joint (21) / outer welding joint (33) and being provided with an adjusting gear (51), the telescopic rod (41) being provided with an adjusting rack (52), the adjusting rack (52) being meshed with the adjusting gear (51), and the telescopic rod (41) being provided with a receiving groove (42). The telescopic rack is provided with an abutment block (53) on a side away from the inner welding joint (21) / outer welding joint (33), the abutment block (53) is in contact with the inner wall of the accommodating cavity, and a connecting pipe (54) is connected between the accommodating cavity and the accommodating groove (42), the second adjusting rod (32) / second rotating rod (23) is also provided with a displacement driving member for slidingly driving the telescopic rod (41), and the telescopic rod (41) is also provided with a rust-proof member (6) for rust-proofing the weld.

8. The auxiliary welding device for an end cover (13) for processing a gas storage cylinder according to claim 7, characterized in that: The displacement driving member comprises a rotating gear (55) rotatably arranged on the second adjusting rod (32) / the second rotating rod (23); a tooth groove (56) is provided on the side wall of the telescopic rod (41); and the rotating gear (55) meshes with the tooth groove (56).

9. The auxiliary welding device for an end cover (13) for processing a gas storage cylinder according to claim 8, characterized in that: The rust-proof part (6) comprises a rust-proof head (61) provided on a side of the telescopic rod (41) close to the end cover (13); the rust-proof head (61) is provided on a side of the inner welding head (21) / outer welding head (33), and the rust-proof head (61) is arranged toward a joint between the cylinder (12) and the end cover (13); a liquid storage tank (62) is provided on both the first rotating rod (22) and the first adjusting rod (31); the liquid storage tank (62) is in communication with the rust-proof head (61), and the liquid storage tank (62) is close to a side of the end cover (13). The width of the cavity is greater than the width of the cavity on the side away from the end cover (13), and a coating plate (63) is slidably arranged in the liquid storage tank (62), and the coating plate (63) is in contact with the inner wall of the liquid storage tank (62). A connecting hole (64) is provided on the side of the liquid storage tank (62) close to the end cover (13), and a plurality of connecting holes (64) are provided. The plurality of connecting holes (64) are arranged along the circumference direction of the liquid storage tank (62), and an opening piece (66) for opening and closing the opening of the rust-proof head (61) is also provided on the rust-proof head (61).

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