A valve operating box body welding device

Abstract

The present application relates to the field of metal welding processing, and particularly relates to a valve operating box body welding device, comprising a polishing unit. In the process of the welding unit moving along the preset motion path, the polishing unit can polish the to-be-welded area of the welding piece before the welding unit welds the welding piece, and remove the oxidation layer on the surface of the welding piece caused by spot welding pre-fixing, so as to avoid welding defects such as insufficient molten pool wetting and pores caused by the existence of the oxidation layer, and ensure that the weld formed by the welding joint is more tightly and firmly combined. At the same time, the polishing unit can also identify the pre-welding points on the welding piece and adaptively adjust the polishing intensity, so that the pre-welding points obtain greater polishing intensity compared to the ordinary area, and the workload of subsequent manual finishing is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of metal welding processing, in particular to a valve operating box body welding device. BACKGROUND

[0002] The valve operating box body welding device is a special equipment for automatically welding each part of the valve operating box body, usually including a positioning mechanism, an automatic welding execution assembly and a numerical control system, and can realize precise butt joint and welding of box body plates, frames and other components. The welding device can adapt to different specifications of the box body through program presetting or parameter adjustment, can stably ensure the strength and uniformity of the weld, greatly improves the welding efficiency and reduces the manual operation error, and is widely used in batch production of industrial valve supporting box bodies.

[0003] In the prior art, before the automatic welding execution assembly performs full welding on the box body, the box body is usually preliminarily fixed by spot welding to ensure the basic shape and dimensional accuracy of the box body. However, after preliminary fixing by spot welding, a dense oxide layer and a pre-welding point are easily formed on the surface of the box body. The melting point of the oxide layer is much higher than that of the base material. When the automatic welding execution assembly performs full welding on the box body, the oxide layer separates the molten pool from the base material, so that the molten pool cannot directly contact the surface of the base material, and pores, incomplete fusion and other defects are easily generated, which seriously affects the bonding strength and sealing performance of the weld. At the same time, after the full welding is completed, the pre-welding point formed by the preliminary spot welding forms obvious raised marks on the surface of the box body, which are difficult to be completely covered, especially the rough welding points are easily left at the corner parts, which not only destroys the flatness of the box body, but also may cause stress concentration, and increases the workload of subsequent polishing and other finishing processes, reduces the production efficiency and increases the manufacturing cost. SUMMARY

[0004] Therefore, it is necessary to provide a valve operating box body welding device to solve the problems of the oxide layer and the pre-welding point generated by spot welding affecting the welding effect and the production efficiency of the valve operating box body welding device.

[0005] The above-mentioned purpose is achieved by the following technical solutions:

[0006] A valve operating box body welding device, comprising:

[0007] A support.

[0008] A welding piece, which can be stably placed on the support.

[0009] A welding unit, which can move along a preset motion path on the support, and can weld the welding piece during the movement of the welding unit along the preset motion path.

[0010] The polishing unit can polish the area to be welded of the welding piece during the welding of the welding unit along the preset movement path, and the polishing unit can also identify the pre-welding point on the welding piece and adaptively adjust the polishing intensity.

[0011] Further, the polishing unit comprises a polishing structure and an adjusting structure, the polishing structure is used for polishing the area to be welded of the welding piece, and the adjusting structure is used for increasing the polishing intensity of the polishing structure on the welding piece when the polishing structure is located at the pre-welding point on the welding piece.

[0012] Further, the polishing structure comprises a fixing frame, a first connecting rod, a friction wheel and a first power source, the fixing frame is fixedly connected with the welding unit, and the fixing frame can move on the support along the preset movement path; one end of the first connecting rod is connected with the fixing frame; the friction wheel is coaxially fixedly provided with a first rotating shaft, the first rotating shaft is rotationally connected with one end of the first connecting rod away from the fixing frame, the axis of the first rotating shaft is perpendicular to the axis of the first connecting rod, during the movement of the fixing frame along the preset movement path, the friction wheel is located at the front side of the welding unit to polish the welding piece, and the welding unit welds the welding piece after the polishing of the welding piece by the friction wheel; the first power source is used for providing power for the rotation of the friction wheel.

[0013] Further, the adjusting structure comprises a first telescopic rod and a first elastic member, the first telescopic rod is coaxially and slidingly connected with the first connecting rod, and the first rotating shaft is rotationally connected with one end of the first telescopic rod away from the first connecting rod; one end of the first elastic member is connected with the first telescopic rod, and the other end of the first elastic member is connected with the first connecting rod, and the elastic force of the first elastic member always makes or tends to make the first telescopic rod and the first connecting rod away from each other.

[0014] Further, the adjusting structure further comprises an elastic arc plate, the elastic arc plate is coaxially and rotationally connected with the first rotating shaft through a one-way bearing, the elastic arc plate can abut against the wall surface of the welding piece, and the elastic arc plate can be elastically deformed; when the friction wheel rotates forward, the one-way bearing makes the elastic arc plate rotate synchronously with the friction wheel; when the friction wheel rotates reversely, the one-way bearing makes the elastic arc plate not rotate with the friction wheel; wherein, during the welding of the welding unit along the preset movement path, the friction wheel reversely rotates.

[0015] The elastic arc plate is provided with a notch, and during the welding of the welding unit along the preset movement path, when the elastic arc plate rotates to the position that the notch is attached to the wall surface of the welding piece, the pre-welding point on the welding piece is located at the notch, and the pre-welding point on each welding piece can be located at the notch.

[0016] Further, the adjusting structure further comprises a detection piece, which is used for positioning the notch on the elastic arc plate before the welding unit welds the welding piece, so as to ensure that each pre-welding point on each welding piece can be located at the notch during the welding of the welding unit.

[0017] Further, the grinding unit further comprises a second power source, and the first connecting rod is slidingly connected to the fixed frame, and the second power source can drive the first connecting rod to move on the fixed frame.

[0018] Further, a cooling unit is further included, which can cool the welded welding piece during the welding of the welding unit along the preset movement path.

[0019] Further, the cooling unit comprises a second connecting rod and a cooling wheel, one end of the second connecting rod is fixedly connected to the fixed frame, the cooling wheel is coaxially fixedly provided with a second rotating shaft, the second rotating shaft is rotatably connected to the end of the second connecting rod away from the fixed frame, the axis of the second rotating shaft is perpendicular to the axis of the second connecting rod, during the movement of the fixed frame along the preset movement path, the cooling wheel is located at the rear side of the welding unit, and the cooling wheel cools the welded welding piece after the welding of the welding unit.

[0020] Further, the cooling unit further comprises a second telescopic rod and a second elastic piece, the second telescopic rod is coaxially slidingly connected to the second connecting rod, and the second rotating shaft is rotatably connected to the end of the second telescopic rod away from the second connecting rod; one end of the second elastic piece is connected to the second telescopic rod, and the other end of the second elastic piece is connected to the second connecting rod, and the elastic force of the second elastic piece always makes the second telescopic rod and the second connecting rod move away from each other or have a tendency to move away from each other.

[0021] The beneficial effects of the present application are:

[0022] This invention provides a valve control box welding device, including a grinding unit. During the welding process where the welding unit welds the workpiece along a preset movement path, the grinding unit grinds the area to be welded on the workpiece before the welding unit welds it, removing the oxide layer generated during spot welding pre-fixation, avoiding defects such as insufficient molten pool wetting and porosity, and ensuring a tight and strong weld bond. Simultaneously, the grinding unit can also identify pre-weld points on the workpiece and adaptively adjust the grinding intensity, giving the pre-weld points a greater grinding intensity than ordinary areas, thereby reducing the amount of subsequent manual finishing work. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of a valve control box welding device provided in an embodiment of the present invention;

[0024] Figure 2 for Figure 1 A magnified view of a section at point A in the middle;

[0025] Figure 3 for Figure 1 Schematic diagram of the grinding unit and cooling unit;

[0026] Figure 4 for Figure 3 Top view of the grinding unit and cooling unit;

[0027] Figure 5 for Figure 3 Front view of the grinding unit and cooling unit;

[0028] Figure 6 for Figure 4 Schematic diagram of the cross section in the middle BB direction;

[0029] Figure 7 for Figure 5 A schematic diagram of the cross-section in the CC direction;

[0030] Figure 8 for Figure 5 A schematic diagram of the cross-section in the DD direction;

[0031] Figure 9 for Figure 7 A magnified view of a section at point E in the middle.

[0032] in:

[0033] 110. Welded component; 120. Bracket; 121. Limiting rod;

[0034] 220. Welding head; 230. Conveying pipe;

[0035] 310, fixed frame; 320, first connecting rod; 330, first telescopic rod; 340, first elastic member; 350, friction wheel; 351, first rotating shaft; 352, one-way bearing; 360, elastic arc plate; 370, first power source; 371, rotating motor; 372, rotating gear; 380, second power source; 390, first rotating rod;

[0036] 420, second connecting rod; 430, second telescopic rod; 440, second elastic member; 450, cooling wheel; 451, second rotating shaft; 460, second rotating rod. DETAILED DESCRIPTION

[0037] In order to make the objects, technical solutions and advantages of the present application clearer, the following further describes the present application with reference to the embodiments and in conjunction with the drawings. It should be understood that the specific embodiments described herein are only used to explain the present application and should not be used to limit the present application.

[0038] The numbers of components in the present application, such as "first", "second", etc., are only used to distinguish the described objects, and do not have any sequence or technical meaning. The "connection" and "coupling" in the present application include direct and indirect connection (coupling) unless otherwise specified. In the description of the present application, it should be understood that the orientations or positional relationships indicated by the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. are based on the orientations or positional relationships shown in the drawings, and are only used to facilitate the description of the present application and simplify the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0039] In the present application, unless otherwise explicitly specified and limited, the first feature "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature "above", "over" and "on" the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "under" and "under" the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0040] The following refers to Figures 1 to 9 The valve operation box body welding device provided by the embodiment of the present application is described.

[0041] Specifically, the valve operation box body welding device comprises a support 120, a welding unit and a polishing unit.

[0042] The support 120 is the mounting base of the entire welding device and provides a stable support carrier for other components. The support 120 is fixedly provided with a limiting rod 121 in the horizontal direction. When the welding piece 110 is placed on the support 120, the limiting rod 121 can block the welding piece 110 from the side or end, ensuring that the welding piece 110 maintains a preset splicing posture and provides a position reference for the accurate welding of the subsequent welding unit.

[0043] The welding unit includes a position adjusting structure, a driving structure, a welding head 220, and a conveying pipe 230.

[0044] The position adjusting structure includes a left-right unit, an up-down unit, a front-rear unit, and an angle unit.

[0045] The left-right unit includes a first threaded rod and a first moving plate. The first threaded rod is a long strip-shaped screw rod that is rotationally connected to the support 120 in the axial horizontal direction of the limiting rod 121. The first moving plate is a plate-shaped structure that is rotationally connected to the first threaded rod through a thread. When the first threaded rod rotates, the thread transmission can drive the first moving plate to move horizontally along the axis of the limiting rod 121.

[0046] The up-down unit includes a slide rail, a second threaded rod, and a second moving plate. The slide rail is two parallel long strip-shaped guide rails, each of which is fixedly provided with an installation plate at the upper and lower ends. The slide rail is vertically fixed to the first moving plate through the installation plates. The second threaded rod is rotationally connected between the two installation plates in the vertical direction and is parallel to the slide rail. The second moving plate is a plate-shaped structure that is rotationally connected to the second threaded rod through a thread and can slide along the slide rail. When the second threaded rod rotates, the thread transmission can drive the second moving plate to move vertically up and down.

[0047] The front-rear unit includes a third threaded rod and a third moving plate. The axis of the third threaded rod is perpendicular to the axis of the first threaded rod in the horizontal direction, and the third threaded rod is rotationally connected to the second moving plate. The third moving plate is a frame structure that is rotationally connected to the third threaded rod through a thread. When the third threaded rod rotates, the thread transmission can drive the third moving plate to translate horizontally in the direction of approaching or moving away from the limiting rod 121.

[0048] The angle unit comprises a rotating frame, a rotating rod and a fixing bolt. The rotating frame is of a frame structure, one end wall surface of which is rotationally connected to the third moving plate through the rotating rod, and the rotating frame can rotate around the axis of the rotating rod. A limiting groove is arranged at the position of the third moving plate abutting against the rotating frame, and the limiting groove is an arc groove with the rotating rod as the center. The wall surface of the rotating frame abutting against the third moving plate is provided with a curved groove, and the curvature of the curved groove is consistent with that of the limiting groove. The fixing bolt is passed through the curved groove and cooperates with the limiting groove. When the rotating frame is adjusted to a preset angle, the fixing bolt is tightened to fix the angle of the rotating frame. The rotating frame can fixedly install the welding head 220 and the conveying pipe 230, and through the rigid support of the rotating frame, the welding head 220 and the conveying pipe 230 can maintain a stable preset interval, thereby ensuring the continuous stability of the welding process.

[0049] The driving structure comprises a first motor, a second motor and a third motor. The first motor is a power source for driving the left-right unit, is fixedly arranged on the support 120, is fixedly connected with one end of the first threaded rod, and can drive the first threaded rod to rotate when started. The second motor is used for driving the up-down unit, is fixedly arranged on the mounting plate away from the first moving plate, is fixedly connected with the top end of the second threaded rod, and can drive the second threaded rod to rotate when started. The third motor is used for driving the front-rear unit, is fixedly arranged on the side wall of the second moving plate, is fixedly connected with one end of the third threaded rod, and can drive the third threaded rod to rotate when started.

[0050] The position adjusting structure and the driving structure jointly drive the welding head 220 and the conveying pipe 230 to complete the welding of the welded part 110 along the preset movement path.

[0051] The welding head 220 is a laser emitting nozzle, which can emit a high-energy-density laser beam to form a high-temperature molten pool in the welding area of the welded part 110 instantaneously.

[0052] The conveying pipe 230 is of a double-layer tubular structure. The inner channel can convey a welding wire as a welding filler material, and the outer channel can convey a shielding gas. When the welded part 110 is welded, the shielding gas can form a gas protection layer around the welding point of the welding head 220 to prevent the welding area from being oxidized by air, and the welding wire is accurately fed into the molten pool through the pushing of the conveying pipe 230.

[0053] The polishing unit comprises a polishing structure and an adjusting structure.

[0054] The polishing structure comprises a fixing frame 310, a first connecting rod 320, a friction wheel 350 and a first power source 370.

[0055] The fixed frame 310 is fixedly installed at the middle part of the welding head 220, and can move synchronously with the welding head 220; one end of the first connecting rod 320 is fixedly connected with the fixed frame 310; the friction wheel 350 is provided as two same circular table structures, and the smaller area circular surfaces of the two circular table structures are coaxially fixedly abutted, so that the friction wheel 350 can polish the two side walls of the welding piece 110, the outer periphery of the friction wheel 350 is wrapped with wear-resistant polishing material, the first rotating shaft 351 is coaxially fixedly arranged on the friction wheel 350, and the first rotating shaft 351 is rotationally connected with the other end of the first connecting rod 320. The axis of the first rotating shaft 351 is perpendicular to the axis of the first connecting rod 320, and during welding of the welding unit on the welding piece 110 along the preset movement path, the friction wheel 350 is located at the front side of the welding head 220, so that the friction wheel 350 can polish the to-be-welded area of the welding piece 110 before the welding head 220 welds the welding piece 110. The first power source 370 is in transmission connection with the first rotating shaft 351, and provides continuous power for rotation of the friction wheel 350.

[0056] The adjusting structure includes the first telescopic rod 330, the first elastic member 340 and the elastic arc plate 360. The first telescopic rod 330 is coaxially and slidingly connected with the first connecting rod 320; the friction wheel 350 is rotationally connected with the first telescopic rod 330 at the end away from the first connecting rod 320 through the first rotating shaft 351, so that the position of the friction wheel 350 can be finely adjusted with the extension and retraction of the first telescopic rod 330. One end of the first elastic member 340 is fixedly connected with one end of the first telescopic rod 330, and the other end is fixedly connected with the inner side wall surface of the first connecting rod 320, the elastic force of the first elastic member 340 always makes the first telescopic rod 330 and the first connecting rod 320 away from each other, thereby providing the basic pressure for the friction wheel 350 to tightly abut against the wall surface of the welding piece 110. The elastic arc plate 360 is in an arc sheet structure and can be elastically deformed, the edge thereof extends in the axial direction away from the friction wheel 350, the elastic arc plate 360 is coaxially and rotationally connected with the first rotating shaft 351 through the one-way bearing 352, the elastic arc plate 360 can abut against the wall surface of the welding piece 110 at the same time as the friction wheel 350, and the friction force can drive the elastic arc plate 360 to rotate on the wall surface of the welding piece 110. During welding of the welding unit on the welding piece 110 along the preset movement path, the rotation direction of the friction wheel 350 is set as reverse rotation. When the friction wheel 350 rotates forward, the one-way bearing 352 makes the elastic arc plate 360 rotate synchronously with the friction wheel 350; when the friction wheel 350 reversely rotates, the elastic arc plate 360 does not rotate with the friction wheel 350.

[0057] The elastic arc plate 360 is provided with a notch matching the size of the pre-welding point. During the welding of the welding piece 110 by the welding unit along the preset motion path, the friction drives the elastic arc plate 360 to rotate on the welding piece 110, and each time the elastic arc plate 360 rotates to the position where the notch matches the wall surface of the welding piece 110, the pre-welding point on the welding piece 110 is located at the notch, and each pre-welding point on the welding piece 110 can be located at the notch.

[0058] Before the welding unit starts to weld the welding piece 110 along the preset motion path, the driving structure of the welding unit first moves the friction wheel 350 and the elastic arc plate 360 of the polishing unit to the pre-welding point on the welding piece 110 through the driving position adjusting structure; then, the first power source 370 drives the friction wheel 350 and the elastic arc plate 360 to rotate forward synchronously until the notch on the elastic arc plate 360 completely corresponds to the welding point of the welding piece 110, and the friction wheel 350 stops rotating immediately. Subsequently, the driving structure drives the position adjusting structure again to move the friction wheel 350 and the elastic arc plate 360 to the starting position of the preset motion path. In this process, the friction wheel 350 and the elastic arc plate 360 always match the wall surface of the welding piece 110, and under the action of the friction force of the wall surface of the welding piece 110, the elastic arc plate 360 drives the friction wheel 350 to rotate forward synchronously.

[0059] When the welding unit starts to weld the welding piece 110 along the preset motion path, the driving structure drives the welding head 220, the friction wheel 350 and the elastic arc plate 360 to move uniformly along the preset motion path through the position adjusting structure. At the same time, the first power source 370 drives the friction wheel 350 to rotate reversely quickly to polish the area to be welded of the welding piece 110. Due to the action of the one-way bearing 352, the elastic arc plate 360 will not move with the reverse rotation of the friction wheel 350, but will rotate along the wall surface of the welding piece 110 under the action of the friction force of the wall surface of the welding piece 110. In this process, the elastic force of the first elastic member 340 continuously acts to make the friction wheel 350 and the elastic arc plate 360 tightly match the wall surface of the welding piece 110, so that the friction wheel 350 can uniformly polish the surface of the welding piece 110 and remove the oxidation layer formed after the pre-fixing of the spot welding. When the elastic arc plate 360 rotates to the position where the notch corresponds to the pre-welding point on the surface of the welding piece 110, the ability of the elastic arc plate 360 to overcome the elastic force of the first elastic member 340 is weakened due to the absence of the elastic arc plate 360 at the notch, the extrusion force of the elastic arc plate 360 on the wall surface of the welding piece 110 is reduced, the elastic force of the first elastic member 340 on the friction wheel 350 is increased, and the polishing force of the friction wheel 350 on the pre-welding point is instantaneously increased, so as to specifically process the pre-welding point.

[0060] Thus, the welding piece 110 is polished by the friction wheel 350 before welding by the welding head 220, the oxide layer on the surface of the welding piece 110 is removed, defects such as pores and incomplete fusion caused by the oxide layer are avoided, the weld formed by the welding head 220 is more firm, and the welding quality is effectively improved. At the same time, the first elastic member 340 and the first telescopic rod 330 make the friction wheel 350 always closely fit the wall surface of the welding piece 110, improving the flatness and consistency of polishing. In addition, through the cooperation of the elastic arc plate 360 gap and the first elastic member 340, the pre-welding point obtains greater polishing force than the ordinary area, which can fully eliminate the protrusion of the pre-welding point, make the welding piece 110 edge smooth and flat, and reduce the workload of subsequent manual finishing.

[0061] It can be understood that the first elastic member 340 can be a spiral spring, or an elastic rubber column structure, which can be coaxially sleeved outside the first telescopic rod 330, or built-in the gap between the first connecting rod 320 and the first telescopic rod 330, but these structures should be able to exert a continuous elastic force on the first telescopic rod 330, so as to promote the first telescopic rod 330 and the first connecting rod 320 to move away from each other, thereby ensuring that the friction wheel 350 closely fits the wall surface of the welding piece 110.

[0062] Further, the polishing structure further comprises a first rotating rod 390. One end of the first rotating rod 390 is hinged to the fixed frame 310, and the other end is fixedly connected with the first connecting rod 320. By adjusting the angle between the first rotating rod 390 and the fixed frame 310, the first connecting rod 320 and the friction wheel 350 can be moved, so as to adjust the distance between the friction wheel 350 and the welding head 220. Thus, the welding device can set the distance between the friction wheel 350 and the welding head 220 according to the material, thickness of the welding piece 110 and the welding process requirements, to ensure that the friction wheel 350 can fully remove the oxide layer before the welding head 220 works, and avoid interference between the friction wheel 350 and the welding head 220 due to too close distance.

[0063] Further, the first power source 370 comprises a rotating motor 371 and two rotating gears 372. The rotating motor 371 is fixedly installed on the outer wall surface of the first telescopic rod 330, and the rotating motor 371 extends an output shaft along the axis of the first telescopic rod 330. The two rotating gears 372 are both bevel gears, and the tooth surfaces thereof are conical, so that power transmission in the vertical direction can be realized. One of the two rotating gears 372 is coaxially and fixedly connected with the output shaft of the rotating motor 371, and the other rotating gear 372 is coaxially and fixedly connected with the first rotating shaft 351, and the tooth surfaces of the two rotating gears 372 are in mesh with each other and are vertically distributed in the axial direction. In use, when the friction wheel 350 needs to be driven to rotate, the rotating motor 371 is connected to the power supply to start driving the output shaft to rotate, and the output shaft drives the rotating gear 372 fixedly connected therewith to rotate synchronously. Since the two rotating gears 372 are in mesh with each other, the rotation of the output shaft is converted into the rotation of the first rotating shaft 351, so as to drive the friction wheel 350 to rotate.

[0064] In one of the embodiments, the adjusting structure further comprises a detection member for positioning the notch on the elastic arc plate 360, so that each pre-welding point on the welding member 110 can be located at the notch when the welding unit welds the welding member 110 along the preset movement path.

[0065] Specifically, the detection member is a torque sensor or a pressure-sensitive sensor, which can monitor the change in the resistance when the elastic arc plate 360 rotates.

[0066] Before the welding unit welds the welding member 110 along the preset movement path, the friction wheel 350 and the elastic arc plate 360 of the polishing unit are first moved to the pre-welding point on the welding member 110; then, the first power source 370 drives the friction wheel 350 and the elastic arc plate 360 to synchronously rotate forward. At this time, the rotation resistance of the elastic arc plate 360 when rotating on the welding member 110 is stable. When the elastic arc plate 360 rotates to the position where the notch corresponds to the pre-welding point of the welding member 110, the protrusion of the pre-welding point will be embedded in the notch. As the elastic arc plate 360 continues to rotate, the protruding pre-welding point will interfere with the edge of the notch, causing the rotation resistance of the elastic arc plate 360 to suddenly increase. This change in resistance is transmitted to the torque sensor or the pressure-sensitive sensor through the first rotating shaft 351, and the first power source 370 immediately stops driving the friction wheel 350 and the elastic arc plate 360 to rotate, at which time the notch and the pre-welding point are accurately positioned.

[0067] Therefore, by detecting the change in the rotation resistance of the elastic arc plate 360 through the torque sensor or the pressure-sensitive sensor, the corresponding timing of the notch and the pre-welding point can be captured in real time, and the first power source 370 can be stopped in time, so that the error caused by manual intervention is avoided.

[0068] In one of the embodiments, the polishing unit further comprises a second power source 380. The connection between the first connecting rod 320 and the fixed frame 310 in the above-mentioned embodiment is modified to be a sliding connection. The second power source 380 can drive the first connecting rod 320 to move on the fixed frame 310 along the axial direction of the first connecting rod 320. After the welding unit completes the welding of the welding piece 110, the weld and the surrounding area need to be polished again. At this time, the driving structure drives the polishing structure to move along the preset movement path again through the position adjusting structure; at the same time, the second power source 380 pushes the first connecting rod 320 to slide towards the welding piece 110, so that the first connecting rod 320 drives the friction wheel 350 to further approach the wall surface of the welding piece 110, thereby increasing the pressure of the friction wheel 350 on the surface of the welding piece 110 and increasing the polishing intensity, so as to deeply process the fine welding scars and weld protrusions that may be left after the first polishing. Therefore, the polishing intensity of the friction wheel 350 is adjusted by the second power source 380, the process interval of transferring the workpiece between different equipment for welding and polishing in the traditional production is eliminated, and the production efficiency is improved.

[0069] It can be understood that the second power source 380 can be an electric push rod, or a cylinder, a hydraulic cylinder, a linear motor or the like. These structures can be fixedly connected to the first connecting rod 320 at one end, or indirectly drive the first connecting rod 320 to slide on the fixed frame 310 through a transmission member, but these structures should be able to promote the first connecting rod 320 to drive the friction wheel 350 to move towards or away from the welding piece 110, so as to adjust the polishing intensity of the friction wheel 350 on the welding piece 110.

[0070] In one of the embodiments, the valve operating box body welding device provided by the embodiment of the present application further comprises a cooling unit. When the welding unit welds the welding piece 110 along the preset movement path, the cooling unit can cool the welded welding piece 110.

[0071] The cooling unit comprises a second connecting rod 420, a second telescopic rod 430, a second elastic member 440 and a cooling wheel 450.

[0072] One end of the second connecting rod 420 is fixedly connected to one end of the fixed frame 310; the second telescopic rod 430 is coaxially and slidingly connected to the second connecting rod 420; one end of the second elastic member 440 is fixedly connected to the second telescopic rod 430, and the other end is fixedly connected to the second connecting rod 420, and the elastic force of the second elastic member 440 always makes the second telescopic rod 430 and the second connecting rod 420 move away from each other.

[0073] The outer wall surface of the cooling wheel 450 is uniformly provided with a plurality of cooling fins. The cooling wheel 450 is coaxially fixedly provided with a second rotating shaft 451, and the second rotating shaft 451 is rotationally connected to one end of the second telescopic rod 430 away from the second connecting rod 420. The axis of the second rotating shaft 451 is perpendicular to the axis of the second telescopic rod 430, and the cooling wheel 450 can abut against the welding piece 110 to cool the welding piece 110. When the welding unit welds the welding piece 110 along the preset movement path, the cooling wheel 450 is located at the rear side of the welding head 220, so that after the welding head 220 completes welding on the welding piece 110, the cooling wheel 450 can act on the high-temperature weld formed on the welding piece 110.

[0074] During the welding process of the welding unit on the welding piece 110 along the preset movement path, since the cooling wheel 450 is located at the rear side of the welding head 220, the high-temperature weld completed by the welding head 220 can be in contact with the cooling wheel 450. The cooling wheel 450 absorbs the heat generated by the weld, and part of the absorbed weld heat is dissipated through the wheel body of the cooling wheel 450, and the other part is quickly transmitted to the cooling fins on the surface of the cooling wheel 450 for dissipation. In this process, the elastic force of the second elastic member 440 is transmitted to the cooling wheel 450 through the second telescopic rod 430, so that the cooling wheel 450 closely abuts against the surface of the weld and moves with the welding head 220.

[0075] Therefore, by means of the cooling unit, cooling action is applied to the weld immediately after the welding piece 110 is welded, the cooling wheel 450 quickly takes away the heat, shortens the cooling time of the weld, and improves the strength of the weld. At the same time, the second elastic member 440 and the second telescopic rod 430 always push the cooling wheel 450 to closely abut against the surface of the welding piece 110, so that the cooling wheel 450 maintains effective contact with the weld area, guarantees the heat conduction efficiency, makes the cooling process uniform and stable, and improves the cooling effect of the weld.

[0076] It can be understood that the embodiments of the present application are mainly used for welding the welding piece 110 made of aluminum alloy material by means of wire filling laser welding.

[0077] When the aluminum alloy material is welded by wire filling laser welding, the temperature of the molten pool is concentrated and controllable, and the temperature of the center of the molten pool is usually maintained at 3000-4000℃, and the temperature gradient of the heat affected zone is steep. After the laser beam of the welding head 220 is turned off, the temperature of the weld area quickly decreases to the solid phase transition interval of 800-1000℃. At this time, the weld has been preliminarily solidified but is still in a high-temperature state. The cooling wheel 450 is arranged at a preset distance behind the welding head 220, and the preset distance is set according to the welding speed and the heat conduction characteristics of the aluminum alloy material.

[0078] When the temperature of the weld area drops to 500-600 DEG C, which is lower than the recrystallization temperature of the aluminum alloy, the cooling wheel 450 is in contact with the surface of the weld, at which time the weld has formed a stable solid oxide layer, and the surface dross has also solidified and adhered, the cooling wheel 450 removes the residual heat through the heat conduction of the metal wheel body, which not only accelerates the cooling of the weld, but also avoids the problems of spatter and damage to the oxide layer caused by contact with the high-temperature liquid molten pool, ensuring the safety of the cooling process and not damaging the material properties.

[0079] It can be understood that the second elastic member 440 can be a coil spring, or an elastic rubber column, etc., which can be coaxially arranged along the axial direction of the second telescopic rod 430, or symmetrically distributed in the gap on both sides of the second telescopic rod 430, but these structures should be able to exert a continuous elastic force on the second telescopic rod 430, so as to drive the second telescopic rod 430 and the second connecting rod 420 to move away from each other, thereby ensuring that the cooling wheel 450 is tightly attached to the wall surface of the welding member 110.

[0080] Further, the cooling unit further comprises a second rotating rod 460. One end of the second rotating rod 460 is hinged to the fixed frame 310, and the other end is fixedly connected to the second connecting rod 420. By adjusting the angle between the second rotating rod 460 and the fixed frame 310, the second connecting rod 420 and the cooling wheel 450 can be driven to move, so as to adjust the distance between the cooling wheel 450 and the welding head 220. Thus, the welding device can flexibly adjust the distance between the cooling wheel 450 and the welding head 220 according to the material, thickness of the welding member 110 and the welding process requirements, so as to ensure that the cooling wheel 450 can cool the weld in time after the welding head 220 works.

[0081] The technical features of the above embodiments can be combined in any manner. To make the description concise, not all possible combinations of the technical features in the above embodiments are described, but as long as the combinations of the technical features do not exist contradictions, they should be considered as the scope of the present application.

[0082] The above embodiments only express several embodiments of the present application, and the description is more specific and detailed, but it should not be understood as a limitation on the scope of the present application. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are within the scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. A valve control box body welding device, characterized in that, include: support; A welded component that can be stably placed on the support; A welding unit is capable of moving along a preset motion path on the support, and during the movement of the welding unit along the preset motion path, the welding unit is capable of welding the workpiece. The grinding unit is used to grind the area to be welded of the weldment during the welding process of the welding unit along the preset motion path. The grinding unit can also identify pre-weld points on the weldment and adaptively adjust the grinding intensity. The grinding unit includes a grinding structure and an adjustment structure. The grinding structure is used to grind the area to be welded of the weldment. The adjustment structure is used to increase the grinding intensity of the grinding structure on the weldment when the grinding structure is located at a pre-weld point on the weldment. The grinding structure includes a fixed frame, a first connecting rod, a friction wheel, and a first power source. The fixed frame is fixedly connected to the welding unit and can move along the preset movement path on the support. One end of the first connecting rod is connected to the fixed frame. The friction wheel is coaxially fixedly provided with a first rotating shaft, which is rotatably connected to the end of the first connecting rod away from the fixed frame. The axis of the first rotating shaft is perpendicular to the axis of the first connecting rod. During the movement of the fixed frame along the preset movement path, the friction wheel is in front of the welding unit and grinds the weldment. After the friction wheel grinds the weldment, the welding unit welds the weldment. The first power source provides power for the rotation of the friction wheel. The adjustment structure includes a first telescopic rod, a first elastic element, and an elastic arc plate. The first telescopic rod is slidably connected to the first connecting rod on the same axis. The first rotating shaft is rotatably connected to the end of the first telescopic rod away from the first connecting rod. One end of the first elastic element is connected to the first telescopic rod, and the other end of the first elastic element is connected to the first connecting rod. The elastic force of the first elastic element always causes the first telescopic rod and the first connecting rod to move away from each other or has a tendency to move away from each other. The elastic arc plate is coaxially rotatably connected to the first rotating shaft via a one-way bearing. The elastic arc plate can abut against the wall surface of the weldment and can generate elastic deformation. When the friction wheel rotates in the forward direction, the one-way bearing causes the elastic arc plate to rotate synchronously with the friction wheel. When the friction wheel rotates in the reverse direction, the one-way bearing causes the elastic arc plate to not rotate with the friction wheel. During the welding process of the welding unit welding the weldment along the preset movement path, the friction wheel rotates in the reverse direction. The elastic arc plate is provided with a notch. During the welding process of the welding unit welding the weldment along the preset movement path, each time the elastic arc plate rotates to the notch and fits against the wall surface of the weldment, the pre-weld point on the weldment is located at the notch, and each pre-weld point on the weldment can be located at the notch.

2. The valve control box welding device according to claim 1, characterized in that, The adjustment structure also includes a detection element. Before the welding unit welds the weldment, the detection element is used to position the notch on the elastic arc plate to ensure that when the welding unit welds the weldment, each pre-weld point on each weldment can be located at the notch.

3. The valve control box welding device according to claim 1, characterized in that, The grinding unit also includes a second power source, and the first connecting rod is slidably connected to the fixed frame. The second power source can drive the first connecting rod to move on the fixed frame.

4. The valve control box welding device according to claim 1, characterized in that, It also includes a cooling unit, which can dissipate heat from the welded part when the welding unit welds the part along the preset movement path.

5. The valve control box welding device according to claim 4, characterized in that, The cooling unit includes a second connecting rod and a cooling wheel. One end of the second connecting rod is fixedly connected to the fixed frame. The cooling wheel is coaxially fixedly provided with a second rotating shaft, which is rotatably connected to the end of the second connecting rod away from the fixed frame. The axis of the second rotating shaft is perpendicular to the axis of the second connecting rod. During the movement of the fixed frame along the preset movement path, the cooling wheel is located behind the welding unit. After the welding unit welds the workpiece, the cooling wheel dissipates heat from the workpiece.

6. The valve control box welding device according to claim 5, characterized in that, The cooling unit further includes a second telescopic rod and a second elastic element. The second telescopic rod is slidably connected to the second connecting rod on the same axis. The second rotating shaft is rotatably connected to the end of the second telescopic rod away from the second connecting rod. One end of the second elastic element is connected to the second telescopic rod, and the other end of the second elastic element is connected to the second connecting rod. The elastic force of the second elastic element always causes the second telescopic rod and the second connecting rod to move away from each other or has a tendency to move away from each other.

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