Arc-shaped metal label welding clamp

Abstract

The invention discloses an arc-shaped metal label welding clamp, and relates to the technical field of metal welding clamps, the arc-shaped metal label welding clamp comprises a mounting base, and further comprises an induction structure which comprises a bottom plate fixed on the surface of the mounting base, bases fixed on the surface of the bottom plate and arranged in a linear array, and supporting bases fixed on the surfaces of the bases, the device comprises a supporting base, a limiting cylinder fixed to the surface of the supporting base, a mounting groove formed in the surface of a mounting base, an induction assembly sliding on the surface of the limiting cylinder, and a transmission assembly fixed to the side edge of the induction assembly. And the compensation structure comprises a solid-liquid box fixed on the transmission assembly, a first flange fixed on the surface of the solid-liquid box, and a first mounting pipe fixed on the surface of the first flange. According to the method, pressure loss of a compression area and abnormal expansion of a suspension area caused by mismatching of thermal deformation are avoided, the accuracy of the curvature of the cambered surface is maintained, surface collapse and upheaval and curved surface distortion after cooling are reduced, and the welding quality is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of metal welding fixtures, in particular to an arc-shaped metal signboard welding fixture. BACKGROUND

[0002] The arc-shaped metal signboard is an arc-shaped identification board made of metal materials, which is widely used in fields such as building decoration, commercial identification, public facilities and brand display.

[0003] In the welding process of the arc-shaped metal signboard, the metal plate is usually processed into a designed arc shape and placed on a welding workbench. A special welding fixture is used to fix the workpiece to maintain the arc shape. The clamping is achieved by the positioning block matched with the arc surface of the workpiece and the adjustable pressing device. The operator adjusts the angle of the positioning block according to the actual arc of the workpiece to ensure that the positioning block completely matches the arc surface of the metal plate. The welding equipment parameters are adjusted and the appropriate welding method is selected. The welding is evenly carried out along the joint to ensure the flatness of the weld. After welding, the weld quality is checked and the fixture residual marks are removed. Finally, the signboard is completed by polishing.

[0004] However, the arc-shaped support surface of the existing welding fixture is manufactured according to the theoretical curvature of the signboard. However, there is an inherent deformation deviation in the actual signboard forming arc surface. The surface matching is achieved by relying on forced pressure in cold state clamping. In the high temperature stage of welding, the compression area produces irreversible compression damage due to the mismatch of the thermal deformation characteristics of the fixture and the signboard. The suspended area abnormally expands, and after cooling, permanent surface collapse and uplift are formed. At the same time, the overall stress imbalance leads to distortion of the curvature of the signboard arc surface, and finally presents observable curved surface distortion, which causes the surface welding quality of the arc-shaped identification board to deteriorate. SUMMARY

[0005] The purpose of the present application is to provide an arc-shaped metal signboard welding fixture to solve the problems raised in the background art.

[0006] To solve the above technical problems, the present application provides the following technical scheme: an arc-shaped metal signboard welding fixture, comprising a mounting base, further comprising:

[0007] The induction structure comprises a bottom plate fixed to the surface of the mounting base, a base fixed to the surface of the bottom plate and arranged in a linear array, a support base fixed to the surface of the base, a limiting cylinder fixed to the surface of the support base, a mounting groove opened on the surface of the mounting base, an induction assembly sliding on the surface of the limiting cylinder, and a transmission assembly fixed to the side of the induction assembly.

[0008] The compensation structure comprises a solid-liquid box fixed to the transmission assembly, a first flange fixed to the surface of the solid-liquid box, a first mounting pipe fixed to the surface of the first flange, a fixed plate fixed to the surface of the first mounting pipe, a fitting assembly fixed to the surface of the first mounting pipe, and a compensation assembly fixed to the fitting assembly.

[0009] As a preferred scheme of the arc-shaped metal signboard welding clamp, one end of the fixed plate is fixedly connected to the surface of the mounting base, and a fastening nut is rotatably connected to the surface of the fixed plate and located at the periphery of the first mounting pipe.

[0010] As a preferred scheme of the arc-shaped metal signboard welding clamp, the sensing assembly comprises a sinking column slidably connected to the surface of the limiting cylinder and the supporting base, an arc-shaped strip located at the end of the sinking column away from the limiting cylinder, a limiting sheet fixedly connected to the surface of the sinking column, and a first spring fixedly connected between the limiting sheet and the limiting cylinder.

[0011] As a preferred scheme of the arc-shaped metal signboard welding clamp, the transmission assembly comprises a liquid storage bag fixedly connected to the surface of the mounting groove and located directly below the base, a sinking groove opened in the surface of the liquid storage bag and located on the surface of the sinking column, a liquid delivery pipe fixedly connected to the side edge of the liquid storage bag, a liquid collecting bag fixedly connected to the surface of the liquid delivery pipe, a transmission pipe fixedly connected to the surface of the liquid collecting bag, and a dispersion pipe fixedly connected to the surface of the solid-liquid box and located at the side edge of the transmission pipe.

[0012] As a preferred scheme of the arc-shaped metal signboard welding clamp, the fitting assembly comprises a second flange fixedly connected to the surface of the first mounting pipe, a second mounting pipe fixedly connected to the surface of the second flange, and a positioning plate fixedly connected to the surface of the second mounting pipe.

[0013] As a preferred scheme of the arc-shaped metal signboard welding clamp, the positioning plate is fixedly connected to surfaces of the symmetrically distributed telescopic cylinders, the telescopic cylinders are slidably connected to surfaces of the telescopic columns, the telescopic columns are fixedly connected to surfaces of the fitting blocks, and the second spring is fixedly connected between the telescopic columns and the fitting blocks.

[0014] As a preferred scheme of the arc-shaped metal signboard welding clamp, the compensation assembly comprises a groove opened in the surface of the fitting block and located at the symmetric position, a anti-dropping cylinder fixedly connected to the surface of the groove, an expansion column movably connected to the surface of the anti-dropping cylinder, a conducting sheet fixedly connected to the top end of the expansion column and located on the surface of the groove, and a push block slidably connected to the side edge of the expansion column.

[0015] As a preferred scheme of the arc-shaped metal nameplate welding clamp, the surface of the fitting block is provided with a containing groove, the surface of the containing groove and the side of the push block are fixedly connected with an air bag in a movable manner, the surface of the fitting block is fixedly connected with a moving rod, and the surface of the moving rod is provided with a plurality of circumferentially arranged backflow holes.

[0016] As a preferred scheme of the arc-shaped metal nameplate welding clamp, the surface of the fitting block is provided with a containing groove, the surface of the containing groove and the side of the push block are fixedly connected with an air bag in a movable manner, the surface of the fitting block is fixedly connected with a moving rod, and the surface of the moving rod is provided with a plurality of circumferentially arranged backflow holes.

[0017] As a preferred scheme of the arc-shaped metal nameplate welding clamp, the surface of the fitting block is provided with a containing groove, the surface of the containing groove and the side of the push block are fixedly connected with an air bag in a movable manner, the surface of the fitting block is fixedly connected with a moving rod, and the surface of the moving rod is provided with a plurality of circumferentially arranged backflow holes.

[0018] The surface of the mounting base is fixedly connected with a sliding rail, and the surface of the sliding rail is slidably connected with a welding piece.

[0019] The beneficial effects of the present application are as follows: through real-time self-adaptive adjustment of the clamping force according to the cambered surface shape, the initial pressure loss problem caused by forced pressure during cold-state clamping is effectively solved; meanwhile, through the liquid flow compensation mechanism triggered by heat conduction, the clamping force is automatically adjusted during the welding high-temperature stage, the compression area pressure loss and the suspended area abnormal expansion caused by thermal deformation mismatch are avoided, the accuracy of the cambered surface curvature is maintained, through the dynamic fitting of the fitting block driven by the liquid, the uniformity and stability of the clamping force during the welding process are ensured, the surface collapse, bulging and cambered surface distortion after cooling are reduced, and finally the welding quality of the arc-shaped metal nameplate surface is improved. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0021] Figure 1 It is the overall structure schematic diagram of the arc-shaped metal nameplate welding clamp.

[0022] Figure 2 It is the mounting base structure schematic diagram of the arc-shaped metal nameplate welding clamp.

[0023] Figure 3 The schematic diagram of the induction structure of the arc-shaped metal nameplate welding clamp of the present application.

[0024] Figure 4 The schematic diagram of the induction assembly structure of the arc-shaped metal nameplate welding clamp of the present application.

[0025] Figure 5 The schematic diagram of the support base of the arc-shaped metal nameplate welding clamp of the present application.

[0026] Figure 6 The schematic diagram of the fixed plate structure of the arc-shaped metal nameplate welding clamp of the present application.

[0027] Figure 7 The schematic diagram of the fitting assembly structure of the arc-shaped metal nameplate welding clamp of the present application.

[0028] Figure 8 The schematic diagram of the compensation assembly structure of the arc-shaped metal nameplate welding clamp of the present application.

[0029] Figure 9 The schematic diagram of the compensation assembly structure of the arc-shaped metal nameplate welding clamp of the present application.

[0030] Figure 10 The schematic diagram of the support plate structure of the arc-shaped metal nameplate welding clamp of the present application.

[0031] Figure 11 The schematic diagram of the support plate structure of the arc-shaped metal nameplate welding clamp of the present application.

[0032] In the figure: 101, mounting base; 200, induction structure; 201, bottom plate; 202, base; 203, support base; 204, limiting cylinder; 205, mounting groove; 206, induction assembly; 207, transmission assembly; 2061, sinking column; 2062, first spring; 2063, arc-shaped strip; 2064, limiting sheet; 2071, liquid storage bag; 2072, infusion tube; 2073, liquid collection bag; 2074, transmission tube; 2075, dispersion tube; 2076, sinking groove; 300, compensation structure; 301, solid-liquid box; 302, first flange; 303, first mounting tube; 304, fixed plate; 305, fastening nut; 306, fitting assembly; 307, compensation assembly; 3061, second flange; 3062, second mounting tube; 3063, positioning plate; 3064, telescopic cylinder; 3065, telescopic column; 3066, second spring; 3067, fitting block; 3071, groove; 3072, anti-dropping cylinder; 3073, expansion column; 3074, conducting sheet; 3075, containing groove; 3076, air bag; 3077, push block; 3078, moving rod; 3079, backflow hole; 3080, moving cavity; 3081, jacking rod; 3082, countercurrent cone; 401, reinforcing base; 402, bolt; 403, rear top plate; 404, support guard plate; 405, connecting column; 406, baffle; 4061, blocking groove; 501, sliding rail; 502, welding piece. DETAILED DESCRIPTION

[0033] In order to make the above objectives, features and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0034] In the following description, a large number of specific details are set forth in order to facilitate a thorough understanding of the present application, but the present application can also be implemented in other ways different from those described herein, and those skilled in the art can make similar generalizations without departing from the concept of the present application, therefore the present application is not limited to the specific embodiments disclosed below.

[0035] Secondly, "one embodiment" or "embodiment" referred to herein means that specific features, structures or characteristics can be included in at least one implementation of the present application. "In one embodiment" appearing in different places in the specification does not mean the same embodiment, nor does it mean an embodiment that is mutually exclusive or selective with other embodiments.

[0036] Thirdly, the present application is described in detail in conjunction with the schematic diagram, and in the detailed description of the embodiments of the present application, the cross-sectional view of the device structure is partially enlarged without the general proportion for the convenience of description, and the schematic diagram is only an example, which should not limit the scope of protection of the present application herein. In addition, three-dimensional spatial dimensions including length, width and depth should be included in actual manufacture.

[0037] Embodiment 1, reference Figures 1-5 As a first embodiment of the present application, a curved metal sign welding clamp is provided, which comprises a mounting base 101, further comprising:

[0038] The induction structure 200 comprises a bottom plate 201 fixed to the surface of the mounting base 101, a base 202 fixed to the surface of the bottom plate 201 and arranged in a linear array, a support base 203 fixed to the surface of the base 202, a limiting cylinder 204 fixed to the surface of the support base 203, a mounting groove 205 opened on the surface of the mounting base 101, an induction assembly 206 sliding on the surface of the limiting cylinder 204, and a transmission assembly 207 fixed to the side of the induction assembly 206; the base 202 arranged in a linear array and the support base 203 form uniformly distributed support points, combined with the guiding effect of the limiting cylinder 204 on the induction assembly 206, to ensure that the deformation of each area of the curved sign during placement can be independently sensed, providing a foundation for subsequent dynamic adjustment and improving the adaptability of the initial stage of clamping.

[0039] The compensation structure 300 comprises a solid-liquid box 301 fixed to the transmission assembly 207, a first flange 302 fixed to the surface of the solid-liquid box 301, a first mounting pipe 303 fixed to the surface of the first flange 302, a fixed plate 304 fixed to the surface of the first mounting pipe 303, a fitting assembly 306 fixed to the surface of the first mounting pipe 303, and a compensation assembly 307 fixed to the fitting assembly 306. The solid-liquid box 301 serves as a liquid transfer station, balancing the pressure of each branch, preventing single-point overload, improving system stability and reducing maintenance frequency, the first flange 302 and the first mounting pipe 303 form a detachable channel, facilitating quick liquid discharge and cleaning, and reducing the action delay caused by impurity deposition.

[0040] The end of the fixed plate 304 is fixedly connected to the surface of the mounting base 101, and the surface of the fixed plate 304 and located at the periphery of the first mounting pipe 303 is rotatably connected with a fastening nut 305. The fixed plate 304 and the fastening nut 305 are combined to make the first mounting pipe 303 obtain adjustable axial pre-tightening, taking into account the assembly stiffness and the later fine-tuning requirements.

[0041] The sensing assembly 206 includes a sinking column 2061 slidably connected to the surface of the limiting cylinder 204 and the support base 203, a curved strip 2063 at one end of the sinking column 2061 away from the limiting cylinder 204, a limiting plate 2064 fixedly connected to the surface of the sinking column 2061, and a first spring 2062 fixedly connected between the limiting plate 2064 and the limiting cylinder 204. The sinking column 2061 can slide on the limiting cylinder 204 and the support base 203, and cooperate with the curved strip 2063 to sensitively sense the pressure of the curved metal sign. The limiting plate 2064 can limit the sliding range of the sinking column 2061, and the first spring 2062 can achieve the reset of the sinking column 2061, allowing the sensing assembly 2066 to flexibly respond according to the weight of the sign, providing an initial sensing signal for subsequent dynamic adjustment.

[0042] During use, when the operator is preparing to weld the curved metal sign, he first needs to accurately place the curved surface of the curved metal sign to be welded on the curved support surface composed of multiple independent curved bars 2063. This curved support surface can provide the sign with initial support that adapts to its curvature through the synergistic effect of multiple curved bars 2063.

[0043] Next, the operator will place the sealing plates for packaging on the top and side surfaces of the curved metal sign, so that the sign and the sealing plates form an integral structure to be welded. Each independent curved strip 2063 has the ability to contact the surface of the curved metal sign and the sealing plate. The design of multiple curved strips 2063 can achieve multi-region and multi-area sensing of the weight of the curved metal sign and the sealing plate. When the overall weight of the curved metal sign and the sealing plate acts on the curved strip 2063, the sinking columns 2061 connected to the surfaces of the multiple curved strips 2063 will be in the limit cylinder 2063. 4, it starts to move downward along the surface of the base 202. This sinking process directly reflects the weight distribution of the sign and the cover. The top surface of the arc strip 2063 forms a continuous line contact with the bottom surface of the sign. When there is a deviation between the actual curved surface of the sign and the theoretical curved surface, the deviation is directly manifested as the vertical sinking amount of the arc strip 2063 at the corresponding position. The arc strip 2063 is fixedly connected to the sinking column 2061, and the sinking column 2061 can only slide axially in the limiting cylinder 204. Therefore, the sign surface error is converted or reduced into the linear displacement of the sinking column 2061.

[0044] Meanwhile, each of the sinking columns 2061 is equipped with a first spring 2062, the elastic force of which is mainly used to help the single sinking column 2061 quickly reset to the initial position after the nameplate and the sealing plate are taken off, so as to carry out the clamping operation next time. In the actual sinking process, the first spring 2062 connected between the sinking column 2061 and the limiting cylinder 204 provides a reset tendency, but the preset elastic force is far lower than the minimum load threshold required for triggering sinking, so the spring tension has negligible effect on the displacement measurement accuracy of the sinking column 2061 in the nameplate clamping stage, thereby ensuring the stability and reliability of the clamping process. Through the multi-arc strip 2063 independent induction and sinking column 2061 displacement conversion mechanism, the forced fitting stress is eliminated in the initial clamping stage.

[0045] Embodiment 2, refer to Figures 1-7 As the second embodiment of the present application, the difference between this embodiment and the first embodiment is that the transmission assembly 207 includes a liquid storage bag 2071 fixedly connected to the surface of the mounting groove 205 and located directly below the base 202, a sinking groove 2076 opened on the surface of the liquid storage bag 2071 and located on the surface of the sinking column 2061, a liquid delivery pipe 2072 fixedly connected to the side of the liquid storage bag 2071, a liquid collection bag 2073 fixedly connected to the surface of the liquid delivery pipe 2072, a transmission pipe 2074 fixedly connected to the surface of the liquid collection bag 2073, and a dispersion pipe 2075 fixedly connected to the surface of the solid-liquid box 301 and located on the side of the transmission pipe 2074. The liquid storage bag 2071 is located directly below the base 202 and is fixed with the mounting groove 205, can accurately receive the pressure transmitted by the sinking column 2061 through the sinking groove 2076, realize the stable extrusion output of the internal medium, the liquid delivery pipe 2072 connects the liquid storage bag 2071 and the liquid collection bag 2073, can orderly transport the medium, the liquid collection bag 2073 can collect multiple media to ensure the balance of the subsequent transmission pressure, the transmission pipe 2074 cooperates with the dispersion pipe 2075, can efficiently transport the collected medium to the solid-liquid box 301, provides continuous power for the compensation structure 300, and realizes stable conversion of pressure signal to power transmission as a whole, ensures the timeliness of dynamic adjustment.

[0046] Further, compared with the embodiment 1, the fitting assembly 306 comprises a second flange 3061 fixedly connected to the surface of the first mounting pipe 303, a second mounting pipe 3062 fixedly connected to the surface of the second flange 3061, and a positioning plate 3063 fixedly connected to the surface of the second mounting pipe 3062. The fitting assembly 306 connects the second mounting pipe 3062 with the first mounting pipe 303 through the second flange 3061, enhances the sealing and stability of the structural connection, avoids medium leakage, provides a channel for medium flow and force transmission for the second mounting pipe 3062, and provides a stable mounting reference for subsequent components for the positioning plate 3063, so that the parts of the fitting assembly 306 can work cooperatively, lay a foundation for the precise movement of the fitting block 3067, and improve the reliability of the overall structure.

[0047] Further, the surface of the positioning plate 3063 is fixedly connected with symmetrically distributed telescopic cylinders 3064, the surface of the telescopic cylinder 3064 is slidingly connected with a telescopic column 3065, the surface of the telescopic column 3065 is fixedly connected with a fitting block 3067, and the telescopic column 3065 and the fitting block 3067 are fixedly connected with a second spring 3066. The symmetric telescopic cylinders 3064 on the surface of the positioning plate 3063 provide guidance for the telescopic column 3065, ensure the smooth sliding of the telescopic column 3065, the telescopic column 3065 is connected with the fitting block 3067, can effectively transmit power to the fitting block 3067, so that the fitting block 3067 can tightly fit the workpiece, the second spring 3066 is connected between the telescopic column 3065 and the fitting block 3067, can provide a buffer and a reset force when the fitting block 3067 changes in force, so that the fitting block 3067 always maintains adaptive contact with the workpiece, avoids excessive extrusion or poor fitting, and enhances the flexibility and adaptability of clamping.

[0048] During use, when the sinking column 2061 moves downward along the limiting cylinder 204 under the gravity of the arc-shaped metal sign and the sealing plate, the bottom end thereof will accurately act on the sinking groove 2076 on the surface of the liquid storage bag 2071, and continuously apply pressure to form extrusion on the liquid storage bag 2071. The dilute aqueous silicone oil liquid contained in the liquid storage bag 2071 will flow along the pre-connected liquid delivery pipe 2072 under the action of the extrusion force, and finally flow into the liquid collecting bag 2073. The liquid collecting bag 2073 is like a buffer and a hub, which concentrates and collects the liquid from multiple liquid storage bags 2071, so that the originally dispersed liquid flow forms a stable and certain pressure overall liquid flow, effectively avoiding the problem that the subsequent transmission effect is affected due to insufficient or unstable pressure of a single liquid flow.

[0049] The aggregated liquid then continues to flow along the transmission pipe 2074, and is evenly distributed to the inside of the solid-liquid box 301 through the distribution pipe 2075, ensuring that the liquid can enter the initial link of the compensation structure 300 in an orderly and sufficient manner. The liquid entering the solid-liquid box 301 will continue to flow along the communication channel between the first flange 302 and the first mounting pipe 303, and then pass through the first mounting pipe 303 and enter the second mounting pipe 3062 through the second flange 3061, forming a coherent liquid transmission path. Inside the second mounting pipe 3062, the flowing liquid gradually accumulates pressure, thereby driving the displacement of the displacement rod 3078 arranged therein. The movement of the displacement rod 3078 will drive the slow movement of the abutting block 3067 connected thereto away from the positioning plate 3063.

[0050] This movement process, on the one hand, enables the abutting block 3067 to gradually approach and tightly abut the gap between the arc-shaped metal sign and the cover plate during the movement process, and as the abutting force gradually increases, it ensures that the abutting state is more firm and reliable, effectively preventing loosening or deviation in subsequent operations. On the other hand, this way of moving the abutting block 3067 by liquid pressure achieves dynamic adjustment of cold clamping. Since the liquid has good fluidity and pressure transmission characteristics, when the actual arc surface of the arc-shaped metal sign or the cover plate has inherent deformation deviation, the liquid can automatically distribute pressure according to the abutting needs of different positions, so that the abutting block 3067 adaptively adjusts the pressure at different positions, avoiding the problem of local excessive extrusion caused by relying on forced pressure in traditional cold clamping.

[0051] This dynamic cold clamping method enables the abutting block 3067 and the workpiece surface to always maintain uniform and moderate abutting force, which not only ensures the stability of clamping, but also does not leave pressure marks or cause hidden damage on the workpiece surface due to forced pressure, laying a solid foundation for reducing quality problems caused by improper clamping in subsequent welding processes. At this time, the entire clamping process is in the cold state stage, and welding operations have not yet begun. All adjustments are based on the initial state of the workpiece and the dynamic pressure transmission of the liquid.

[0052] The remaining structure is the same as that of Example 1.

[0053] Example 3, with reference to Figures 1-11For the third embodiment of the present application, which is different from the second embodiment, the compensation assembly 307 comprises a groove 3071 opened on the surface of the fitting block 3067 and located at the symmetry, a anti-off cylinder 3072 fixedly connected to the surface of the groove 3071, an expansion column 3073 movably connected to the surface of the anti-off cylinder 3072, a conductive sheet 3074 fixedly connected to the top end of the expansion column 3073 and located on the surface of the groove 3071, and a push block 3077 slidingly connected to the side edge of the expansion column 3073. The symmetrical groove 3071 on the surface of the fitting block 3067 provides installation space for the anti-off cylinder 3072 and the expansion column 3073, the anti-off cylinder 3072 can limit the activity range of the expansion column 3073 to prevent it from being separated from the fitting block 3067, and the conductive sheet 3074 can quickly receive the heat generated by welding and transfer it to the expansion column 3073, so that the expansion column 3073 expands due to heat, and then pushes the push block 3077 to move, realizing the conversion of heat into mechanical force, providing trigger power for subsequent pressure compensation adjustment, and ensuring that the thermal deformation can be responded in time during the high-temperature welding stage.

[0054] Further, compared with the second embodiment, the surface of the fitting block 3067 is provided with a containing groove 3075, the surface of the containing groove 3075 and located at the side edge of the push block 3077 is movably connected with an air bag 3076, the surface of the fitting block 3067 is fixedly connected with a moving rod 3078, and the surface of the moving rod 3078 is provided with circumferentially arranged backflow holes 3079. The containing groove 3075 on the surface of the fitting block 3067 provides a space for the air bag 3076, and when the push block 3077 presses the air bag 3076, the air bag 3076 can transfer the force to the top rod 3081, playing a role of force buffering and transmission; the moving rod 3078 as a connecting component can drive the fitting block 3067 to move synchronously, and the circumferentially arranged backflow holes 3079 on the surface thereof provide a channel for the backflow of liquid, ensuring that the liquid can circulate smoothly when the temperature changes, maintaining the dynamic balance of the pressure, and enhancing the self-adaptive ability of the fitting block 3067 to the workpiece.

[0055] Further, the surface of the moving rod 3078 is provided with a moving cavity 3080, the inside of the moving cavity 3080 is slidingly connected with a top rod 3081, one end of the top rod 3081 is fixedly connected to the surface of the air bag 3076, and the end of the top rod 3081 away from the air bag 3076 is fixedly connected with a reverse flow cone 3082. The moving cavity 3080 on the surface of the moving rod 3078 provides a guide for the sliding of the top rod 3081, so that the top rod 3081 can stably push the reverse flow cone 3082, the top rod 3081 connected with the air bag 3076 and the reverse flow cone 3082 can effectively transfer the expansion force of the air bag 3076 to the reverse flow cone 3082, control the opening and closing of the reverse flow cone 3082, thereby adjusting the flow of liquid into the moving cavity 3080, realizing precise control of the pressure of the fitting block 3067, and ensuring that the pressure can be adjusted in time according to the temperature change during the welding process.

[0056] Furthermore, the surface of the mounting base 101 is fixedly connected to a symmetrically distributed reinforcement base 401, the surface of the reinforcement base 401 is rotatably connected to a bolt 402, one end of the bolt 402 is rotatably connected to a rear top plate 403, the surface of the rear top plate 403 is fixedly connected to a support guard plate 404, the surface of the rear top plate 403 is fixedly connected to a connecting column 405, the surface of the connecting column 405 is fixedly connected to a baffle 406, the surface of the baffle 406 is provided with a retaining groove 4061, the surface of the mounting base 101 is fixedly connected to a slide rail 501, and the surface of the slide rail 501 is slidably connected to a welding part 502. The reinforced base 401 on the surface of the mounting base 101 provides stable support for the bolt 402. The position of the rear top plate 403 can be adjusted by rotating the bolt 402, so that the support guard plate 404 can firmly support the cover plates at both ends of the arc-shaped metal sign. The baffle 406 and the retaining groove 4061 connected by the connecting column 405 fix the side to form a multi-directional stable support point to avoid the workpiece from shifting during the clamping process. The cooperation between the slide rail 501 and the welding part 502 enables the welding part 502 to move flexibly, which is convenient for welding at different positions and improves the flexibility and convenience of operation. The working principle of this part is the existing technology, which can be clearly understood by those skilled in the art and will not be elaborated here.

[0057] During use, when the dynamic clamping is completed securely, the welding process is officially started. At this time, the gap between the arc-shaped metal sign and the sealing plate generates a high temperature due to the welding operation, and a large amount of heat will be transferred to the surrounding area. Since the conductive sheet 3074 has good high-temperature resistance, this high heat can be quickly transmitted to the expansion column 3073 along the conductive sheet 3074, causing the end of the expansion column 3073 away from the anti-slip cylinder 3072 to expand due to heat. The expanded expansion column 3073 will generate a thrust on the push block 3077, prompting the push block 3077 to move into the accommodating groove 3075, and then squeeze the airbag 3076 located in the accommodating groove 3075. The accommodating groove 3075 is tightly sealed by the sealing plate, which strictly limits the activity space inside the accommodating groove 3075. Under the continuous squeezing of the push block 3077, the airbag 3076 will continue to expand, and the expansion force generated by it will act evenly on the push rod 3081, pushing the push rod 3081 to move smoothly along the inner wall of the movable cavity 3080.

[0058] With the movement of the top rod 3081, the reverse flow cone 3082 originally active sealing at the top end of the moving rod 3078 is gradually pushed away, which opens up a channel for the liquid to enter the moving cavity 3080 smoothly from the second installation pipe 3062. As the liquid continues to flow into the moving cavity 3080, the amount of liquid in the second installation pipe 3062 gradually decreases, at which time the moving rod 3078 will move back under the elastic force of the second spring 3066, driving the abutting block 3067 to move towards the positioning plate 3063, thereby reducing the holding force on the area that expands during welding, effectively avoiding the problem of pressure loss caused by excessive holding force. When the welding pin on the welded part 502 moves to an area away from the abutting block 3067 for welding, the welding point at the location of the abutting block 3067 begins to cool down, and the change in temperature causes the state of the related components to change. The liquid in the moving cavity 3080 will flow back into the second installation pipe 3062 along the circumferentially arranged backflow holes 3079 on the surface of the moving rod 3078 under the action of the pressure difference.

[0059] The backflow liquid accumulates pressure again in the second installation pipe 3062, which in turn drives the moving rod 3078 to move the abutting block 3067 away from the positioning plate 3063, allowing the abutting block 3067 to tightly fit again at the gap between the arc-shaped metal sign and the sealing plate, ensuring the firmness of the fit. Through this cycle, the holding force at the welding site can always be kept within a stable range and will not fluctuate excessively due to temperature changes. This dynamic adjustment of the working state will be repeated until the entire welding process is complete.

[0060] The conduction sheet 3074 transfers heat to make the expansion column 3073 expand, which in turn drives the related components to reduce the holding force, avoiding irreversible pressure loss in the compression area caused by sustained high pressure. When the welding point cools down and shrinks, the liquid backflow re-increases the holding force, ensuring the tight fit of the abutting block 3067 with the workpiece, preventing abnormal expansion of the suspended area due to the loss of restraint, reducing the permanent surface collapse and bulge formed after cooling. At the same time, the holding force remains stable throughout the process, avoiding distortion of the curvature of the arc surface of the sign caused by stress imbalance, effectively preventing the distortion of the curved surface, and fundamentally solving the problem of surface welding quality degradation of the arc-shaped sign caused by mismatching of the thermal deformation characteristics of the existing welding fixture, significantly improving the surface flatness and arc surface precision of the sign after welding, and ensuring stable and reliable welding quality.

[0061] In addition, the reinforced base 401 on the surface of the mounting base 101 provides solid support for the rear top plate 403, and the support guard plate 404 on the rear top plate 403 can stably hold the cover plates at both ends of the arc-shaped metal sign. The operator can accurately control the clamping force on the cover plates at both ends by manually adjusting the bolts 402, ensuring that the fixing effect at both ends meets the requirements. At the same time, the baffle 406 and the blocking groove 4061 can effectively fix the side edges of the arc-shaped metal sign, cooperating with the fixing effect of the fitting block 3067 to form multiple stable fixing points. In this way, even if the fitting block 3067 side is constantly adjusting the clamping force, it will not affect the stability of the overall clamping, and will not hinder the smooth movement of the welded part 502 on the sliding rail 501, ensuring the continuity and convenience of the welding operation. The working principle of this part is the prior art, and those skilled in the art can clearly understand it, and it is not repeated here.

[0062] The rest of the structure is the same as that of Example 2.

[0063] It should be noted that the above examples are only used to illustrate the technical solutions of the present application and are not limiting. Although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or replaced by equivalents without departing from the spirit and scope of the present application, and they should be covered in the scope of the claims of the present application.

Claims

1. A curved metal sign welding fixture, comprising a mounting base (101), characterized in that: Also includes: The sensing structure (200) comprises a bottom plate (201) fixed on the surface of the mounting base (101), a base (202) fixed on the surface of the bottom plate (201) and arranged in a linear array, a supporting base (203) fixed on the surface of the base (202), a limiting cylinder (204) fixed on the surface of the supporting base (203), a mounting groove (205) provided on the surface of the mounting base (101), a sensing component (206) sliding on the surface of the limiting cylinder (204), and a transmission component (207) fixed on the side of the sensing component (206); The compensation structure (300) includes a solid-liquid box (301) fixed on the transmission component (207), a first flange (302) fixed on the surface of the solid-liquid box (301), a first mounting tube (303) fixed on the surface of the first flange (302), a fixing plate (304) fixed on the surface of the first mounting tube (303), a fitting component (306) fixed on the surface of the first mounting tube (303), and a compensation component (307) fixed on the fitting component (306).

2. The arc-shaped metal sign welding fixture according to claim 1, characterized in that: One end of the fixing plate (304) is fixedly connected to the surface of the mounting base (101), and a fastening nut (305) is rotatably connected to the surface of the fixing plate (304) and located at the periphery of the first mounting tube (303).

3. The arc-shaped metal sign welding fixture according to claim 2, characterized in that: The sensing component (206) includes a sinking column (2061) slidably connected to the limiting cylinder (204) and the surface of the support base (203), an arc-shaped strip (2063) at one end of the sinking column (2061) away from the limiting cylinder (204), a limiting plate (2064) fixedly connected to the surface of the sinking column (2061), and a first spring (2062) fixedly connected between the limiting plate (2064) and the limiting cylinder (204).

4. The arc-shaped metal sign welding fixture according to claim 3, characterized in that: The transmission component (207) includes a liquid storage bag (2071) fixedly connected to the surface of the installation groove (205) and located directly below the base (202), a sinking groove (2076) opened on the surface of the liquid storage bag (2071) and located on the surface of the sinking column (2061), an infusion tube (2072) fixedly connected to the side of the liquid storage bag (2071), a liquid collection bag (2073) fixedly connected to the surface of the infusion tube (2072), a transmission tube (2074) fixedly connected to the surface of the liquid collection bag (2073), and a dispersion tube (2075) fixedly connected to the surface of the solid-liquid box (301) and located on the side of the transmission tube (2074).

5. The arc-shaped metal sign welding fixture according to claim 4, characterized in that: The fitting assembly (306) includes a second flange (3061) fixedly connected to the surface of the first mounting tube (303), a second mounting tube (3062) fixedly connected to the surface of the second flange (3061), and a positioning plate (3063) fixedly connected to the surface of the second mounting tube (3062).

6. The arc-shaped metal sign welding fixture according to claim 5, characterized in that: The surface of the positioning plate (3063) is fixedly connected to symmetrically distributed telescopic cylinders (3064), the surface of the telescopic cylinders (3064) is slidably connected to telescopic columns (3065), the surface of the telescopic columns (3065) is fixedly connected to fitting blocks (3067), and a second spring (3066) is fixedly connected between the telescopic columns (3065) and the fitting blocks (3067).

7. The arc-shaped metal sign welding fixture according to claim 6, characterized in that: The compensation component (307) includes a groove (3071) opened on the surface of the fitting block (3067) and located symmetrically, an anti-slip cylinder (3072) fixedly connected to the surface of the groove (3071), an expansion column (3073) movably connected to the surface of the anti-slip cylinder (3072), a conductive sheet (3074) fixedly connected to the top of the expansion column (3073) and located on the surface of the groove (3071), and a push block (3077) slidably connected to the side of the expansion column (3073).

8. The arc-shaped metal sign welding fixture according to claim 7, characterized in that: The surface of the fitting block (3067) is provided with a receiving groove (3075), the surface of the receiving groove (3075) is fixedly and movably connected to the side of the pushing block (3077) with an air bag (3076), the surface of the fitting block (3067) is fixedly connected to a shift rod (3078), and the surface of the shift rod (3078) is provided with circumferentially arranged reflux holes (3079).

9. The arc-shaped metal sign welding fixture according to claim 8, characterized in that: A movable cavity (3080) is provided on the surface of the movable rod (3078), and a push rod (3081) is slidably connected inside the movable cavity (3080). One end of the push rod (3081) is fixedly connected to the surface of the airbag (3076), and the end of the push rod (3081) away from the airbag (3076) is fixedly connected to a countercurrent cone (3082).

10. The arc-shaped metal sign welding fixture according to claim 1, characterized in that: The surface of the mounting base (101) is fixedly connected to a symmetrically distributed reinforcement base (401), the surface of the reinforcement base (401) is rotatably connected to a bolt (402), one end of the bolt (402) is rotatably connected to a rear top plate (403), the surface of the rear top plate (403) is fixedly connected to a support guard plate (404), the surface of the rear top plate (403) is fixedly connected to a connecting column (405), the surface of the connecting column (405) is fixedly connected to a baffle (406), and the surface of the baffle (406) is provided with a baffle groove (4061); The surface of the mounting base (101) is fixedly connected to a slide rail (501), and the surface of the slide rail (501) is slidably connected to a welding piece (502).

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