Metal guardrail welding device

Abstract

The invention relates to the technical field of welding, and particularly discloses a metal guardrail welding device which comprises a machine body, a double-shaft moving table and a welding gun fixedly connected to the double-shaft moving table and internally provided with an electric arc sensor, and conveying rollers used for supporting and conveying a transverse rod are arranged on the two sides of the machine body; a clamping block is slidably arranged on the machine body in the vertical direction, a stop block is hinged to the side, back on to the moving direction of the transverse pipe, of the top end of the clamping block, a containing cavity is formed in the clamping block, a sodium sulfate decahydrate layer is contained in the containing cavity, and a plurality of heat conduction plates are arranged in the clamping block; the machine body is provided with a lifting assembly used for lifting the clamping blocks and an overturning assembly used for controlling the check blocks to rotate. The machine body is provided with a cooling pipe with the length larger than that of the transverse pipe, an adjusting assembly used for adjusting the transverse pipe to be arranged on the cooling pipe in a sleeving mode and a feeding assembly used for conveying the vertical pipe into the clamping block. The vertical pipe welding device has the effect of conducting one-time welding on eight edges at the two ends of a vertical pipe, and the phenomenon that a workpiece is welded through by a welding gun is reduced.

Description

Technical Field

[0001] The present application relates to the field of welding technology, and in particular to a metal guardrail welding device. Background Art

[0002] Road guardrail welding devices are professional equipment used for welding road guardrails. They are widely used in many fields, such as highways, urban roads, bridges, tunnels, etc. These devices greatly improve the production efficiency and quality of road guardrails.

[0003] In the right Figure 6 When the guardrail is welded, the vertical pipe (91) and the horizontal pipe (92) of the guardrail are prefabricated and welded by a welding device in a factory, and the column (93) is manually installed on site and the prefabricated guardrail part is also connected to the column (93). When the horizontal pipe (92) and the vertical pipe (91) are welded, they are mainly welded by an automatic welding gun, which can be installed on a robot arm or a multi-axis moving table. The horizontal pipe (92) and the vertical pipe (91) are fixed on the machine body, and then the welding gun sequentially welds the vertical pipe (91).

[0004] With respect to the above-mentioned related technologies, the inventors believe that the following defects exist: whether it is a welding gun on a robotic arm or a welding gun on a multi-axis mobile platform, when welding a workpiece, due to the angle limitation of the robotic arm or the multi-axis mobile platform itself and the position limitation of the machine body and the vertical pipe, it is impossible to complete the welding of the four sides of the workpiece at one time. Generally, it is necessary to turn the entire guardrail over after one welding to weld at another angle, which is inefficient, or the final product is incompletely welded, but the stability and sealing of the incompletely welded guardrail are poor, and after years of use, the vertical pipe and the horizontal pipe are prone to breakage and internal corrosion of the vertical pipe. At the same time, when welding multiple sides of a thinner workpiece, the welding time is long, and the welding gun is prone to weld through the workpiece, thereby affecting the welding quality. Summary of the invention

[0005] In order to improve the problem that it is difficult for a welding gun to weld a total of eight sides of the vertical pipe at one time, and the welding gun is prone to weld through thinner horizontal pipes and vertical pipes, the present application provides a metal guardrail welding device.

[0006] The metal guardrail welding device provided in this application adopts the following technical solution: A metal guardrail welding device, comprising a machine body, a plurality of two-axis movable platforms arranged on the machine body, and a welding gun fixedly connected to the two-axis movable platforms and having an arc sensor built therein, characterized in that: there are four two-axis movable platforms and they are evenly arranged on both sides of the machine body, the initial positions of the two welding guns located on the same side of the machine body are arranged on both sides of a vertical pipe to be welded and are respectively located at the highest point and the lowest point of the vertical pipe to be welded, and conveying rollers for supporting and conveying a cross bar are arranged on both sides of the machine body; A clamping block is provided on the machine body for sliding along the vertical direction, a stopper is hinged on the top of the clamping block and on the side facing away from the moving direction of the horizontal tube, a receiving cavity is provided in the clamping block, a sodium sulfate decahydrate layer is accommodated in the receiving cavity, a plurality of heat conducting plates are provided in the clamping block, the heat conducting plates penetrate the sodium sulfate decahydrate layer and the two opposite ends of the heat conducting plates are fixedly connected to the inner wall of the clamping block, the clamping block is located at the welding point close to the vertical tube, and the clamping block and the stopper are both made of aluminum alloy, and a lifting component for lifting the clamping block and a flipping component for controlling the rotation of the stopper are provided on the machine body; The machine body is provided with a cooling tube longer than the horizontal tube, the cooling tube is tightly pressed against the inner wall of the horizontal tube, the machine body is provided with an adjustment component for adjusting the horizontal tube to be inserted into the cooling tube, and the machine body is also provided with a loading component for conveying the vertical tube into the clamping block.

[0007] By adopting the above technical scheme, the horizontal tube is placed on the conveying roller, the vertical tube is conveyed to the clamping block through the feeding assembly, and then the lifting assembly makes the clamping block rise, and at the same time the flipping assembly makes the stopper flip. When the clamping block moves to the highest position, the stopper presses the vertical tube, and then the double-axis moving platform controls the welding gun to move, that is, the lower welding gun on the same side moves up for welding first, and the upper welding gun moves down for welding, and then the two welding guns move horizontally for welding until the four sides of the vertical tube are welded, and then the welding guns return along the original path. At this time, one vertical tube is welded, the flipping assembly controls the stopper to open, and then the conveying roller rotates to make the next welding position of the horizontal tube move to the welding station. In this process, the vertical tube in the clamping block also moves out of the clamping block with the horizontal tube; then the lifting assembly controls the clamping block to descend, and then the above steps are repeated to weld the subsequent vertical tubes and horizontal tubes in turn; when the welding gun is welding, the built-in arc sensor of the welding gun The device also detects the status of the welding gun in real time. When welding occurs, the arc sensor can detect the change of the arc to remind the staff; when the welding gun is welding, the clamping block made of aluminum alloy can absorb the heat at the welding point of the vertical pipe with high efficiency. When the welding gun is operated for a long time and the clamping block absorbs too much heat, the sodium sulfate decahydrate layer in the clamping block will gradually lose crystal water and absorb a large amount of heat. The higher the temperature, the faster the dehydration, thereby effectively inhibiting the temperature rise of the clamping block and effectively preventing the vertical pipe from being welded through. Since the dehydration reaction of sodium sulfate decahydrate is a reversible reaction, after the entire welding operation is completed, the clamping block gradually cools down, and the combination speed of sodium sulfate and water is accelerated to re-form sodium sulfate decahydrate; before the horizontal tube is inserted into or leaves the cooling tube, the adjustment component adjusts the cooling tube to make the horizontal tube enter and exit smoothly. During the welding process, the longer cooling tube effectively cools the horizontal tube, and the cooling tube further fixes the horizontal tube.

[0008] Optionally, the adjustment assembly includes two adjustment plates elastically hinged at both ends of the cooling pipe, a locking plate slidably arranged on the body and located directly below the adjustment plate, a pressure block fixedly connected to the locking plate on the side facing the horizontal pipe conveying direction, an elastic telescopic rod arranged at the bottom of the adjustment plate, and a slot opened on the locking plate and plug-matched with the adjustment plate, the side of the pressure block away from the locking plate is gradually inclined from the bottom of the pressure block to the top toward the direction approaching the pressure block, the side of the locking plate away from the pressure block is longer than the length of the adjustment plate, and when the elastic telescopic rod is in a free state, the top of the pressure block is higher than the highest point of the conveying roller, and when the adjustment plate is in a free state, the adjustment plate is in a vertical state and at this time the adjustment plate can only be flipped in the horizontal pipe conveying direction by external force.

[0009] By adopting the above technical scheme, when the cross tube is driven by the conveying roller and is about to be sleeved on the cooling tube, the cross tube presses the pressure block to move the pressure block downward, the elastic telescopic rod contracts, and then the locking plate moves downward, at this time the locking plate is disengaged from the lock of the adjusting plate, and when the cross tube continues to be conveyed to the adjusting plate, the cross tube pushes the adjusting plate to rotate until the cross tube is successfully sleeved on the cooling tube, at this time one end of the cooling tube is supported by the cross tube, and the other end continues to be supported by the unrotated adjusting plate; when the cross tube is completely located on the cooling tube, the cross tube does not abut against the adjusting plate, at this time the adjusting plate is affected by the elastic force and rotates again to a state perpendicular to the cooling tube, and when the cross tube moves to disengage from the abutment with the locking plate, the locking plate is stretched upward by the elastic telescopic rod until the slot of the locking plate is re-connected with the adjusting plate; when the cross tube continues to move, the adjusting component located at the end opposite to the moving direction of the cross tube also performs the same process as mentioned above to facilitate the disengagement of the cross tube.

[0010] Optionally, an inert gas detector is fixedly connected to the cooling tube at the welding station, and a ventilation hole is provided on a side of the cooling tube close to the welding gun facing the inert gas detector.

[0011] By adopting the above technical scheme, when the welding gun is welding, if the horizontal pipe is welded through by the welding gun due to an accident, the inert gas (such as helium, argon and other gases) generated during the welding process of the welding gun enters the air vents from the gap of the weld, and enters the inert gas detector from the air vents, so as to remind the staff that the horizontal pipe is welded through. When the arc sensor of the welding gun fluctuates and the inert gas detector does not detect the inert gas, it means that the vertical pipe is welded through, that is, the arc sensor of the welding gun and the inert gas detector cooperate with each other to further accurately locate the position of the weld.

[0012] Optionally, a heat sink is fixedly connected horizontally in the cooling tube, and the heat sink is wavy. A fan is fixedly connected to the machine body obliquely above one end of the cooling tube away from the welding gun, and the air outlet of the fan is tilted toward the cooling tube.

[0013] By adopting the above technical solution, during welding, the fan continuously blows air into the cooling pipe, part of the heat on the cooling pipe is taken away by the cooling air, and at the same time part of the heat on the cooling pipe is conducted to the heat sink. The wavy heat sink provides a larger contact area, so that the cooling air can fully dissipate the heat on the heat sink, further improving the heat dissipation effect of the cooling pipe, and then improving the heat dissipation effect of the cross pipe; when a part of the cross pipe begins to separate from the cooling pipe, the cross pipe is completely welded at this time, and the cross pipe blocks the wind blown by the fan, that is, the fan directly cools the surface of the cross pipe, thereby accelerating the cooling speed of the finished product after welding.

[0014] Optionally, high-temperature water-permeable cotton with embedded reinforcing ribs is fixedly connected inside the clamping block, the high-temperature water-permeable cotton on each side is parallel to the side wall of the clamping block opposite thereto, and a plurality of heat dissipation fins are also fixedly connected to the outer wall of the clamping block.

[0015] By adopting the above technical scheme, part of the water after dehydration of the sodium sulfate decahydrate layer is absorbed by the high-temperature water-permeable cotton, and part of it enters the cavity of the clamping block on the side of the high-temperature water-permeable cotton away from the sodium sulfate decahydrate layer. When welding stops, the dehydration rate of the sodium sulfate decahydrate is lower than the rate of the hydration reaction. At this time, the water in the high-temperature water-permeable cotton is more evenly absorbed by the sodium sulfate decahydrate. When the water vapor in the clamping block turns into liquid water, the high-temperature water-permeable cotton also absorbs the liquid water due to the capillary phenomenon, thereby providing a water source for the sodium sulfate decahydrate layer. When the clamping block absorbs heat, the heat dissipation fins can accelerate the heat dissipation of the clamping block. Since the clamping block is always in a circulating lifting process, the contact between the clamping block and the airflow will be accelerated during movement, thereby further accelerating the heat dissipation speed of the clamping block and the heat dissipation fins.

[0016] Optionally, the lifting assembly includes a lifting plate fixedly connected to the machine body, a rack fixedly connected to the lifting plate near one end of the vertical pipe, a lifting platform slidably connected to the lifting plate, a lifting motor fixedly connected to the lifting platform, and a lifting gear fixedly connected to the output end of the lifting motor, the lifting gear is meshed with the rack, and the clamping block is fixedly connected to the lifting platform.

[0017] By adopting the above technical solution, when the clamping block needs to rise, the lifting motor drives the lifting gear to rotate, and the rotating lifting gear drives the lifting platform to rise vertically along the lifting plate due to the action of the rack, thereby raising the clamping block; conversely, when the lifting motor reverses, the clamping block is lowered, and the structure is simple and the accuracy is high.

[0018] Optionally, the flipping assembly includes a driving gear meshingly connected to the rack, a transmission shaft coaxially fixed to the driving gear, an active bevel gear coaxially fixed to the transmission shaft away from the driving gear end, a first hinge shaft rotatably connected to the clamping block, a passive bevel gear coaxially fixed to the first hinge shaft and a second hinge shaft elastically hinged to the stopper, the active bevel gear is meshingly connected to the passive bevel gear, and the first hinge shaft and the second hinge shaft are fixedly connected, when the clamping block moves from the lowest point to the highest point, the stopper gradually flips toward the direction approaching the clamping block, and when the stopper is in a free state and the clamping block is at the highest position, the stopper fits with the clamping block.

[0019] By adopting the above technical solution, when the lifting motor drives the lifting gear to rotate and the clamping block rises, the driving gear also rises in the vertical direction, and because the driving gear is also meshed with the rack, the driving gear also rotates, and the driving gear rotation drives the transmission shaft to rotate, and the transmission shaft drives the active bevel gear to rotate, the active bevel gear drives the passive bevel gear to rotate, and the passive bevel gear drives the first hinge shaft to rotate. Since the second hinge shaft is fixedly connected to the first hinge shaft, the second hinge shaft rotates with the first hinge shaft as the rotation axis, thereby closing the stopper, and the vertical pipe is fixed by the clamping block and the stopper; when the fixed vertical rod is welded, the conveying roller conveys the horizontal pipe to move, and the vertical pipe welded on the horizontal pipe also moves accordingly. When the vertical tube is completely separated from the stopper, the second hinge shaft drives the stopper to close while the first hinge shaft does not move. When the vertical tube is completely separated from the stopper, the second hinge shaft rotates again under the elastic force, thereby closing the stopper on the clamping block. Then the lifting motor drives the clamping block to descend. During this process, the first hinge shaft rotates in the opposite direction of the aforementioned rotation direction, thereby opening the stopper. When the clamping block rises, the stopper gradually closes, when the vertical tube is separated from the clamping, the stopper opens while the first hinge shaft does not move, when the vertical tube is completely separated from the stopper, the second hinge shaft drives the stopper to close while the first hinge shaft does not move, and when the clamping block descends, the stopper gradually closes. The structure is relatively simple and only one power source, the lifting motor, is required to solve the lifting and lowering of the clamping block and the closing of the stopper.

[0020] Optionally, the loading assembly includes a conveyor belt fixed to the machine body and an electric push rod fixed to the machine body and located above the conveyor belt, the conveyor belt is perpendicular to the moving direction of the cross tube, one end of the conveyor belt is located inside the machine body, and the other end extends outside the machine body.

[0021] By adopting the above technical solution, the conveyor belt drives the vertical pipe to move towards the machine body. After the vertical pipe moves to the specified position, the electric push rod quickly pushes the vertical pipe into the clamping block, thereby completing the loading of the vertical pipe with high loading efficiency.

[0022] Optionally, a baffle is fixedly connected to one end of the bottom surface of the clamping block close to the stop block, and the height of the baffle is not lower than the moving height of the clamping block.

[0023] By adopting the above technical solution, after the clamping block rises, the remaining transverse tubes remaining on the conveyor belt are blocked by the baffle, thereby preventing the baffle on the conveyor belt from accidentally moving under the raised clamping block and causing accidents in subsequent feeding.

[0024] Optionally, a guide frame is fixedly connected to the machine body at one end of the cooling tube facing the moving direction of the transverse tube, the guide frame is plug-fitted with the transverse tube and the end of the guide frame away from the cooling tube is flared.

[0025] By adopting the above technical solution, the flared guide frame corrects the direction of the cross tube during movement and makes it easier for the cross tube to be inserted into the cooling tube. At the same time, the guide frame also makes the cross tube more stable when moving.

[0026] In summary, the present application includes at least one of the following beneficial technical effects: 1. When welding with a welding torch, the clamping block made of aluminum alloy can absorb the heat of the vertical pipe welding position more efficiently. When the welding torch is operated for a long time and the clamping block absorbs too much heat, the sodium sulfate decahydrate layer in the clamping block will gradually lose crystal water and absorb a large amount of heat. The higher the temperature, the faster the dehydration, thereby effectively inhibiting the temperature rise of the clamping block and effectively preventing the vertical pipe from being welded through. Since the dehydration reaction of sodium sulfate decahydrate is a reversible reaction, after the entire welding operation is completed, the clamping block gradually cools down, and the combination speed of sodium sulfate and water is accelerated, and sodium sulfate decahydrate is re-formed. Compared with air cooling, that is, directly blowing cooling air to the weld, the cooling air is easy to change the fluidity and solidification behavior of the molten pool, resulting in uneven weld formation. If circulating water cooling is used, a huge cooling system and complex water cooling pipes are required, which is not convenient for the vertical pipe to move up and down and enter and exit the clamping block. When the ambient temperature is low, the water cooling pipe with too low a temperature may even inhibit the formation of the molten pool. At the same time, the rapid heat loss will also make it difficult to maintain the high temperature required for the molten pool, thereby affecting the final welding effect. 2. The fan continuously blows air into the cooling pipe, and part of the heat on the cooling pipe is taken away by the cooling air. At the same time, part of the heat on the cooling pipe is conducted to the heat sink. The wavy heat sink provides a large contact area, so that the cooling air can fully dissipate the heat on the heat sink, further improving the heat dissipation effect of the cooling pipe, and then improving the heat dissipation effect of the cross pipe; 3. When the cross tube is driven by the conveying roller and is about to be mounted on the cooling tube, the cross tube presses the pressure block to move the pressure block downward, the elastic telescopic rod contracts, and then the locking plate moves downward, at which time the locking plate is disengaged from the locking of the adjustment plate, and when the cross tube continues to be conveyed to the adjustment plate, the cross tube pushes the adjustment plate to rotate until the cross tube is successfully mounted on the cooling tube. At this time, one end of the cooling tube is supported by the cross tube, and the other end continues to be supported by the unrotated adjustment plate. When the cross tube is completely located on the cooling tube, the cross tube does not abut against the adjustment plate. At this time, the adjustment plate is affected by the elastic force and rotates again to a perpendicular state to the cooling tube. When the cross tube moves to disengage from the abutment with the locking plate, the locking plate is extended by the elastic telescopic rod and moves upward until the slot of the locking plate is re-connected with the adjustment plate; when the cross tube continues to move, the adjustment component located at the end opposite to the moving direction of the cross tube also performs the same process as mentioned above to facilitate the disengagement of the cross tube; 4. When the horizontal pipe is welded through by the welding gun due to an accident, the inert gas generated during the welding process of the welding gun enters the air vent from the gap at the weld, and enters the inert gas detector from the air vent, so as to remind the staff that the horizontal pipe is welded through. When the arc sensor of the welding gun fluctuates and the inert gas detector does not detect the inert gas, it means that the vertical pipe is welded through, that is, the arc sensor of the welding gun and the inert gas detector cooperate with each other to further accurately determine the location of the weld. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application; Figure 2 This application is mainly used to show the clamping block and the stopper and the internal structure diagram of the clamping block and the stopper; Figure 3 is along Figure 1 Schematic diagram of the partial cross-section structure along the AA line; Figure 4 yes Figure 3 A schematic diagram of the enlarged structure of part B; Figure 5 This is a partial schematic diagram mainly used in this application to show the lifting assembly, the flip assembly, the clamping block and the conveyor belt; Figure 6 It is a schematic diagram of the overall structure of the guardrail of this application.

[0028] Figure numerals: 1, machine body; 11, two-axis moving platform; 12, welding gun; 13, fan; 14, guide frame; 2, conveying roller; 31, clamping block; 311, accommodating chamber; 312, sodium sulfate decahydrate layer; 313, heat conduction plate; 314, high-temperature water-permeable cotton; 315, cooling fins; 316, baffle; 32, block; 4, lifting assembly; 41, lifting plate; 42, rack; 43, lifting platform; 44, lifting motor; 45, lifting gear; 5, flip assembly; 51, drive Gear; 52, transmission shaft; 53, active bevel gear; 54, first hinge shaft; 55, passive bevel gear; 56, second hinge shaft; 6, cooling pipe; 61, inert gas detector; 62, air vent; 63, heat sink; 64, receiving groove; 7, adjustment component; 71, adjustment plate; 72, locking plate; 73, pressure block; 74, elastic telescopic rod; 75, slot; 8, feeding component; 81, conveyor belt; 82, electric push rod; 91, vertical pipe; 92, horizontal pipe; 93, column. DETAILED DESCRIPTION

[0029] The following is combined with Figure 1-5 This application is described in further detail.

[0030] The present application embodiment discloses a metal guardrail welding device. Figure 1-Figure 5A metal guardrail welding device includes a machine body 1, four two-axis movable platforms 11 arranged on the machine body 1, and a welding gun 12 fixedly connected to the two-axis movable platform 11 and equipped with an arc sensor. The four two-axis movable platforms 11 are arranged in pairs on both sides of the machine body 1. The two welding guns 12 located on the same side of the machine body 1 are initially arranged on both sides of a vertical pipe 91 to be welded and are respectively located at the highest point and the lowest point of the vertical pipe 91 to be welded, wherein the welding gun 12 located on one side of the vertical pipe 91 facing the conveying direction of the horizontal pipe 92 is initially located at the lowest point, and the welding gun 12 on the other side is located at the highest point. A plurality of conveying rollers 2 for supporting and conveying a cross bar are rotatably connected on both sides of the machine body 1. A clamping block 31 is provided on the body 1 for sliding along the vertical direction, a stopper 32 is hinged on the top of the clamping block 31 and on one side facing away from the moving direction of the horizontal tube 92, a receiving chamber 311 is provided in the clamping block 31, a sodium sulfate decahydrate layer 312 or a magnesium sulfate heptahydrate layer is accommodated in the receiving chamber 311, and the sodium sulfate decahydrate layer 312 with stronger heat absorption capacity is provided in the present application, a plurality of heat conducting plates 313 are provided in the clamping block 31, the heat conducting plates 313 penetrate the sodium sulfate decahydrate layer 312 and the two opposite ends of the heat conducting plates 313 are fixedly connected to the inner wall of the clamping block 31, the clamping block 31 is located at the welding point close to the vertical tube 91, and the clamping block 31 and the stopper 32 are both made of aluminum alloy, and the sodium sulfate decahydrate layer 312 and the heat conducting plate 313 are also provided in the stopper 32 in the present application, and a lifting component 4 for lifting and lowering the clamping block 31 and a flipping component 5 for controlling the rotation of the stopper 32 are provided on the body 1. An aluminum alloy cooling tube 6 longer than the horizontal tube 92 is movably provided on the machine body 1. The cooling tube 6 is tightly pressed against the inner wall of the horizontal tube 92. An adjusting component 7 for adjusting the horizontal tube 92 to be inserted into the cooling tube 6 is provided on the machine body 1. A loading component 8 for conveying the vertical tube 91 into the clamping block 31 is also provided on the machine body 1.

[0031] The horizontal tube 92 is placed on the conveying roller 2, and the vertical tube 91 is conveyed to the clamping block 31 through the feeding assembly 8. Then the lifting assembly 4 makes the clamping block 31 rise, and at the same time, the flip assembly 5 flips the stopper 32. When the clamping block 31 moves to the highest position, the stopper 32 presses the vertical tube 91, and then the double-axis moving platform 11 controls the welding gun 12 to move, that is, the lower welding gun 12 on the same side moves up to weld first, and the upper welding gun 12 moves down to weld, and then the two welding guns 12 move horizontally to weld until the vertical tube 9 1 is welded, and then the welding gun 12 is returned to the original path. At this time, a vertical pipe 91 is welded, and the flip assembly 5 controls the stopper 32 to open, and then the conveying roller 2 rotates to move the next welding position of the horizontal pipe 92 to the welding station. In this process, the vertical pipe 91 in the clamping block 31 also moves out of the clamping block 31 along with the horizontal pipe 92; then the lifting assembly 4 controls the clamping block 31 to descend, and then the above steps are repeated to weld the subsequent vertical pipes 91 and horizontal pipes 92 in sequence; when the welding gun 12 is welding, the welding gun 12 The built-in arc sensor also detects the state of the welding gun 12 in real time. When welding occurs, the arc sensor can detect the change of the arc to remind the staff. When the welding gun 12 is welding, the clamping block 31 made of aluminum alloy can absorb the heat at the welding point of the vertical pipe 91 with high efficiency. When the welding gun 12 is operated for a long time and the clamping block 31 absorbs too much heat, the sodium sulfate decahydrate layer 312 in the clamping block 31 will gradually lose crystal water and absorb a large amount of heat. The higher the temperature, the faster the dehydration, thereby effectively inhibiting the welding. The temperature of the clamping block 31 is raised to effectively prevent the vertical pipe 91 from being welded through. Since the dehydration reaction of sodium sulfate decahydrate is a reversible reaction, after the entire welding operation is completed, the clamping block 31 is gradually cooled down, and the combination speed of sodium sulfate and water is accelerated, and sodium sulfate decahydrate is re-formed. Before the transverse tube 92 is inserted into or leaves the cooling tube 6, the adjustment component 7 adjusts the cooling tube 6 to make the transverse tube 92 enter and exit more smoothly. During the welding process, the longer cooling tube 6 effectively cools the transverse tube 92, and the cooling tube 6 further fixes the transverse tube 92.

[0032] Reference Figure 3 and Figure 4The adjusting assembly 7 comprises two adjusting plates 71 elastically hinged at both ends of the cooling tube 6, a locking plate 72 slidably arranged on the machine body 1 and located directly below the adjusting plate 71, a pressing block 73 fixedly connected to the locking plate 72 on the side facing the conveying direction of the transverse tube 92, an elastic telescopic rod 74 arranged at the bottom of the adjusting plate 71, and a slot 75 opened on the locking plate 72 and plugged and adapted to the adjusting plate 71. The side of the pressing block 73 away from the locking plate 72 is gradually inclined from the bottom of the pressing block 73 to the top in a direction close to the pressing block 73. The side of the locking plate 72 away from the pressing block 73 is longer than the length of the adjusting plate 71, and when the elastic telescopic rod 74 is in a free state, the top of the pressing block 73 is higher than the highest point of the conveying roller 2. When the adjusting plate 71 is in a free state, the adjusting plate 71 is in a vertical state and at this time the adjusting plate 71 can only be turned over in the conveying direction of the transverse tube 92 by external force. The bottom wall of the cooling tube 6 is also provided with a receiving groove 64 for accommodating the adjusting plate 71.

[0033] When the transverse tube 92 is driven by the conveying roller 2 and is about to be sleeved on the cooling tube 6, the transverse tube 92 presses the pressing block 73 to move the pressing block 73 downward, and the elastic telescopic rod 74 contracts, thereby moving the locking plate 72 downward. At this time, the locking plate 72 is released from the lock of the adjustment plate 71. When the transverse tube 92 continues to be conveyed to the adjustment plate 71, the transverse tube 92 pushes the adjustment plate 71 to rotate until the adjustment plate 71 rotates into the receiving groove 64 and the transverse tube 92 is smoothly sleeved on the cooling tube 6. At this time, one end of the cooling tube 6 is supported by the transverse tube 92, and the other end continues to be supported by the adjustment plate 71. The plate 71 is used for support; when the cross tube 92 is completely located on the cooling tube 6, the cross tube 92 does not abut against the adjustment plate 71. At this time, the adjustment plate 71 is affected by the elastic force and rotates again to be perpendicular to the cooling tube 6. When the cross tube 92 moves to disengage from the abutment with the locking plate 72, the locking plate 72 moves upward due to the extension of the elastic telescopic rod 74 until the slot 75 of the locking plate 72 is re-inserted into the adjustment plate 71; when the cross tube 92 continues to move, the adjustment component 7 located at the end opposite to the moving direction of the cross tube 92 also performs the same process as mentioned above to facilitate the disengagement of the cross tube 92.

[0034] Reference Figure 3 An inert gas detector 61 is fixedly connected in the cooling tube 6 at the welding station. The inert gas detector 61 can be a helium detector or an argon detector. The specific model of the inert gas detector 61 is actually installed according to the actual working conditions. A vent hole 62 is opened on the side of the cooling tube 6 close to the welding gun 12, facing the inert gas detector 61; a heat sink 63 is horizontally fixed in the cooling tube 6. The heat sink 63 can be made of copper or aluminum alloy. The present application is an aluminum alloy heat sink 63, and the heat sink 63 is wavy. A fan 13 is fixedly connected to the body 1 at an oblique upper side of the end of the cooling tube 6 away from the welding gun 12, and the air outlet of the fan 13 is tilted toward the cooling tube 6.

[0035] When the welding gun 12 is welding, if the horizontal tube 92 is welded through by the welding gun 12 due to an accident, the inert gas generated during the welding process of the welding gun 12 enters the air vent 62 from the gap where the welding is penetrated, and enters the inert gas detector 61 from the air vent 62, so as to remind the staff that the horizontal tube 92 is welded through. When the arc sensor of the welding gun 12 fluctuates and the inert gas detector 61 does not detect the inert gas, it means that the vertical tube 91 is welded through, that is, the arc sensor of the welding gun 12 and the inert gas detector 61 cooperate with each other to further accurately locate the position of the welding penetration. At the same time, the fan 13 continues to blow air into the cooling tube 6, and part of the heat on the cooling tube 6 is taken away by the cooling wind. The heat is transferred to the heat sink 63. The wavy heat sink 63 provides a larger contact area, so that the cooling wind can fully dissipate the heat from the heat sink 63, further improving the heat dissipation effect of the cooling tube 6, and then improving the heat dissipation effect of the cross tube 92; and when a part of the cross tube 92 begins to separate from the cooling tube 6, the cross tube 92 is now completely welded, and the cross tube 92 blocks the wind blown out by the fan 13, that is, the fan 13 directly cools the surface of the cross tube 92, thereby accelerating the cooling speed of the finished product after welding, and the airflow blown out by the fan 13 also takes away the inert gas remaining after the previous detection and passing through the inert gas detector 61, to avoid the inert gas entering the cooling tube 6 after the previous welding to interfere with the subsequent welding operation.

[0036] Reference Figure 2 A high-temperature water-permeable cotton 314 with embedded reinforcing ribs is fixedly connected inside the clamping block 31. The high-temperature water-permeable cotton 314 on each side is parallel to the side wall of the clamping block 31 opposite to it. A plurality of heat dissipation fins 315 are also fixedly connected to the outer wall of the clamping block 31. After dehydration, part of the water in the sodium sulfate decahydrate layer 312 is absorbed by the high-temperature water-permeable cotton 314, and part of it enters the cavity of the clamping block 31 on the side of the high-temperature water-permeable cotton 314 away from the sodium sulfate decahydrate layer 312. When welding stops, the dehydration rate of the sodium sulfate decahydrate is lower than the rate of the hydration reaction. At this time, the water in the high-temperature water-permeable cotton 314 is more evenly absorbed by the sodium sulfate decahydrate. When the water vapor in the clamping block 31 is converted into liquid water, the high-temperature water-permeable cotton 314 also absorbs the liquid water due to capillary phenomenon, thereby providing a water source for the sodium sulfate decahydrate layer 312. When the clamping block 31 absorbs heat, the heat dissipation fins 315 can accelerate the heat dissipation of the clamping block 31. Since the clamping block 31 is always in a circulating lifting process, the contact between the clamping block 31 and the airflow will be accelerated during movement, thereby further accelerating the heat dissipation speed of the clamping block 31 and the heat dissipation fins 315.

[0037] Reference Figure 5The lifting assembly 4 includes a lifting plate 41 fixed to the machine body 1, a rack 42 fixed to one end of the lifting plate 41 near the vertical pipe 91, a lifting platform 43 slidably connected to the lifting plate 41, a lifting motor 44 fixed to the lifting platform 43, and a lifting gear 45 fixed to the output end of the lifting motor 44. The lifting gear 45 is meshed and connected with the rack 42, and the clamping block 31 is fixed to the lifting platform 43. When the clamping block 31 needs to rise, the lifting motor 44 drives the lifting gear 45 to rotate, and the rotating lifting gear 45 drives the lifting platform 43 to rise vertically along the lifting plate 41 due to the action of the rack 42, thereby raising the clamping block 31; on the contrary, when the lifting motor 44 is reversed, the clamping block 31 is lowered, and the structure is simple and the accuracy is high.

[0038] Reference Figure 5 The flip assembly 5 includes a driving gear 51 meshed with the rack 42, a transmission shaft 52 coaxially fixed to the driving gear 51, an active bevel gear 53 coaxially fixed to the end of the transmission shaft 52 away from the driving gear 51, a first hinge shaft 54 ​​rotatably connected to the clamping block 31, a passive bevel gear 55 coaxially fixed to the first hinge shaft 54, and a second hinge shaft 56 elastically hinged to the stopper 32. The active bevel gear 53 is meshed with the passive bevel gear 55, and the first hinge shaft 54 ​​and the second hinge shaft 56 are fixedly connected. When the clamping block 31 moves from the lowest point to the highest point, the stopper 32 gradually flips toward the direction close to the clamping block 31. When the stopper 32 is in a free state and the clamping block 31 is at the highest position, the stopper 32 fits with the clamping block 31.

[0039] When the lifting motor 44 drives the lifting gear 45 to rotate and the clamping block 31 rises, the driving gear 51 also rises in the vertical direction, and because the driving gear 51 is also meshed with the rack 42, the driving gear 51 also rotates, and the driving gear 51 rotates to drive the transmission shaft 52 to rotate, and the transmission shaft 52 drives the active bevel gear 53 to rotate, and the active bevel gear 53 drives the passive bevel gear 55 to rotate, and the passive bevel gear 55 drives the first hinge shaft 54 ​​to rotate. Since the second hinge shaft 56 is fixedly connected to the first hinge shaft 54, the second hinge shaft 56 rotates with the first hinge shaft 54 ​​as the rotation axis, thereby closing the stopper 32. At this time, the vertical pipe 91 is fixed by the clamping block 31 and the stopper 32; when the fixed vertical rod is welded, the conveying roller 2 conveys the horizontal pipe 92 to move, and the vertical pipe 91 welded on the horizontal pipe 92 also moves accordingly, and the moving vertical pipe 91 pushes the stopper 32 to rotate, that is, the second hinge shaft 56 rotates, but the first hinge shaft 54 ​​does not move. When the vertical rod is completely disengaged from the stopper 32 and abuts against the stopper 32, the second hinge shaft 56 rotates again under the elastic force, thereby closing the stopper 32 on the clamping block 31, and then the lifting motor 44 drives the clamping block 31 to descend. During this process, the first hinge shaft 54 ​​rotates in the opposite direction of the aforementioned rotation direction, thereby opening the stopper 32, that is, when the clamping block 31 rises, the stopper 32 gradually closes, when the vertical tube 91 is disengaged from the clamping, the stopper 32 opens while the first hinge shaft 54 ​​does not move, when the vertical tube 91 is completely disengaged from the stopper 32 and abuts against the stopper 32, the second hinge shaft 56 drives the stopper 32 to close while the first hinge shaft 54 ​​does not move, and when the clamping block 31 descends, the stopper 32 gradually closes. The structure is relatively simple and only one power source, the lifting motor 44, is required to solve the lifting and lowering of the clamping block 31 and the closing of the stopper 32.

[0040] Reference Figure 1 and Figure 2 The feeding assembly 8 includes a conveyor belt 81 fixed to the body 1 and an electric push rod 82 fixed to the body 1 and located above the conveyor belt 81. The conveyor belt 81 is perpendicular to the moving direction of the cross tube 92. One end of the conveyor belt 81 is located inside the body 1 and the other end extends outside the body 1. The body 1 is also fixed with a limit plate, which is located above one end of the conveyor belt 81 inside the body 1; a baffle 316 is fixed to one end of the bottom surface of the clamping block 31 close to the baffle 32, and the height of the baffle 316 is not lower than the moving height of the clamping block 31.

[0041] The conveyor belt 81 drives the vertical tube 91 to move toward the machine body 1. After the vertical tube 91 moves to the specified position, the electric push rod 82 quickly pushes the vertical tube 91 into the clamping block 31, and the vertical tube 91 can be loaded with materials, and the loading efficiency is high. After the clamping block 31 rises, the remaining horizontal tube 92 on the conveyor belt 81 is blocked by the baffle 316, so as to prevent the baffle 316 on the conveyor belt 81 from accidentally moving to the lower side of the raised clamping block 31, causing subsequent loading accidents.

[0042] Reference Figure 1 The machine body 1 is fixedly connected with a guide frame 14 at one end of the cooling tube 6 facing the moving direction of the transverse tube 92. The guide frame 14 is plugged and adapted with the transverse tube 92, and the end of the guide frame 14 away from the cooling tube 6 is flared. The flared guide frame 14 corrects the direction of the transverse tube 92 during the movement, and makes it easier for the transverse tube 92 to be inserted into the cooling tube 6. At the same time, the guide frame 14 also makes the transverse tube 92 more stable when moving.

[0043] The implementation principle of a metal guardrail welding device in an embodiment of the present application is as follows: a transverse tube 92 is placed on a conveying roller 2, and the conveying roller 2 intermittently conveys the transverse tube 92, and the transverse tube 92 presses the pressure block 73 to move the pressure block 73 downward, and the elastic telescopic rod 74 contracts, thereby moving the locking plate 72 downward. At this time, the locking plate 72 is disengaged from the lock on the adjustment plate 71, and when the transverse tube 92 continues to be conveyed to the adjustment plate 71, the transverse tube 92 pushes the adjustment plate 71 to rotate until the adjustment plate 71 rotates into the accommodating groove 64 and the transverse tube 92 is smoothly mounted on the cooling tube 6. At this time, one end of the cooling tube 6 is supported by the transverse tube 92, and the other end continues to be supported by the non-rotating adjustment plate 71; the conveyor belt 81 drives the vertical tube 91 to move in a direction close to the machine body 1 After the vertical pipe 91 moves to the specified position, the electric push rod 82 quickly pushes the vertical pipe 91 into the clamping block 31 to complete the loading of the vertical pipe 91; then the lifting motor 44 drives the lifting gear 45 to rotate, and the rotating lifting gear 45 drives the lifting platform 43 to rise vertically along the lifting plate 41 due to the action of the rack 42, thereby causing the clamping block 31 to rise until the clamping block 31 rises to the specified position and the stopper 32 is just completely closed; then the double-axis moving platform 11 controls the welding gun 12 to move, that is, the lower welding gun 12 located on the same side moves up for welding first, and the upper welding gun 12 moves down for welding, and then the two welding guns 12 move horizontally for welding, and after the four sides of the vertical pipe 91 are welded, the welding gun 12 returns to the original path.

[0044] During the welding process, the clamping block 31 made of aluminum alloy can absorb the heat at the welding point of the vertical pipe 91 with high efficiency. When the welding gun 12 operates for a long time and causes the clamping block 31 to absorb too much heat, the sodium sulfate decahydrate layer 312 in the clamping block 31 will gradually lose crystal water and absorb a large amount of heat. The higher the temperature, the faster the dehydration, thereby effectively suppressing the temperature rise of the clamping block 31 and effectively preventing the vertical pipe 91 from being welded through. Since the dehydration reaction of sodium sulfate decahydrate is a reversible reaction, after the entire welding operation is completed, the clamping block 31 gradually cools down, and the combination speed of sodium sulfate and water is accelerated, sodium sulfate decahydrate is re-formed, and the phenomenon of vertical pipe 91 being welded through is effectively avoided. The fan 13 continuously blows air into the cooling pipe 6, and part of the heat on the cooling pipe 6 is taken away by the cooling wind. At the same time, part of the heat on the cooling pipe 6 is also taken away by the cooling wind. The heat is conducted to the heat sink 63. The wavy heat sink 63 provides a larger contact area, so that the cooling wind can fully dissipate the heat from the heat sink 63, further improving the heat dissipation effect of the cooling tube 6, and further improving the heat dissipation effect of the cross tube 92. When the cross tube 92 is penetrated by the welding gun 12 due to an accident, the inert gas generated during the welding process of the welding gun 12 enters the air vent 62 from the gap where the weld is penetrated, and enters the inert gas detector 61 from the air vent 62, so as to remind the staff that the cross tube 92 is penetrated. When the arc sensor of the welding gun 12 fluctuates and the inert gas detector 61 does not detect the inert gas, it means that the vertical tube 91 is penetrated, that is, the arc sensor of the welding gun 12 cooperates with the inert gas detector 61 to further accurately determine the position of the weld.

[0045] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A metal guardrail welding device, comprising a machine body (1), a plurality of two-axis movable platforms (11) arranged on the machine body (1), and a welding gun (12) fixedly connected to the two-axis movable platforms (11) and having an arc sensor built in, characterized in that: There are four dual-axis movable tables (11) evenly arranged on both sides of the machine body (1); the initial positions of the two welding guns (12) located on the same side of the machine body (1) are arranged on both sides of the vertical pipe (91) to be welded and are respectively located at the highest point and the lowest point of the vertical pipe (91) to be welded; and conveying rollers (2) for supporting and conveying cross bars are arranged on both sides of the machine body (1); A clamping block (31) is slidably disposed on the machine body (1) in a vertical direction, a stopper (32) is hingedly connected to the top of the clamping block (31) and on a side facing away from the moving direction of the transverse tube (92), a receiving cavity (311) is provided in the clamping block (31), a sodium sulfate decahydrate layer (312) is accommodated in the receiving cavity (311), a plurality of heat conducting plates (313) are disposed in the clamping block (31), and the heat conducting plates (313) penetrate the decahydrate layer (312). The sodium sulfate layer (312) is formed on the heat conducting plate (313), and the two opposite ends of the heat conducting plate (313) are fixedly connected to the inner wall of the clamping block (31), the clamping block (31) is located at a welding point close to the vertical pipe (91), and the clamping block (31) and the stop block (32) are both made of aluminum alloy. The machine body (1) is provided with a lifting component (4) for lifting the clamping block (31) and a turning component (5) for controlling the rotation of the stop block (32); The machine body (1) is provided with a cooling tube (6) which is longer than the transverse tube (92), the cooling tube (6) being tightly abutted against the inner wall of the transverse tube (92), the machine body (1) is provided with an adjustment component (7) for adjusting the transverse tube (92) to be inserted into the cooling tube (6), and the machine body (1) is also provided with a loading component (8) for conveying the vertical tube (91) into the clamping block (31); The adjustment assembly (7) comprises two adjustment plates (71) elastically hinged at two ends of the cooling pipe (6), a locking plate (72) slidably arranged on the machine body (1) and located directly below the adjustment plate (71), a pressing block (73) fixedly connected to the locking plate (72) on the side facing the conveying direction of the transverse pipe (92), an elastic telescopic rod (74) arranged at the bottom of the adjustment plate (71) and a slot (75) provided on the locking plate (72) and plugged and adapted to the adjustment plate (71), wherein the pressing block (73) is away from the locking plate (71). One side of the locking plate (72) is gradually inclined from the bottom of the pressing block (73) to the top in a direction close to the pressing block (73); the side of the locking plate (72) away from the pressing block (73) is longer than the length of the adjusting plate (71); and when the elastic telescopic rod (74) is in a free state, the top of the pressing block (73) is higher than the highest point of the conveying roller (2); when the adjusting plate (71) is in a free state, the adjusting plate (71) is in a vertical state and at this time the adjusting plate (71) can only be overturned in the conveying direction of the horizontal tube (92) by external force.

2. A metal guardrail welding device according to claim 1, characterized in that: An inert gas detector (61) is fixedly connected inside the cooling tube (6) at the welding station, and a ventilation hole (62) is provided on a side of the cooling tube (6) close to the welding gun (12) and facing the inert gas detector (61).

3. A metal guardrail welding device according to claim 1, characterized in that: A heat sink (63) is fixedly connected horizontally in the cooling tube (6), and the heat sink (63) is wavy in shape. A fan (13) is fixedly connected to the machine body (1) obliquely above an end of the cooling tube (6) away from the welding gun (12), and an air outlet of the fan (13) is tilted and aligned with the cooling tube (6).

4. A metal guardrail welding device according to claim 1, characterized in that: A high-temperature water-permeable cotton (314) with embedded reinforcing ribs is fixedly connected inside the clamping block (31), and the high-temperature water-permeable cotton (314) on each side is parallel to the side wall of the clamping block (31) opposite thereto, and a plurality of heat dissipation fins (315) are also fixedly connected to the outer wall of the clamping block (31).

5. A metal guardrail welding device according to claim 1, characterized in that: The lifting assembly (4) comprises a lifting plate (41) fixedly connected to the machine body (1), a rack (42) fixedly connected to one end of the lifting plate (41) close to the vertical pipe (91), a lifting platform (43) slidably connected to the lifting plate (41) in the vertical direction, a lifting motor (44) fixedly connected to the lifting platform (43), and a lifting gear (45) fixedly connected to the output end of the lifting motor (44), wherein the lifting gear (45) is meshingly connected to the rack (42), and the clamping block (31) is fixedly connected to the lifting platform (43).

6. A metal guardrail welding device according to claim 5, characterized in that: The flip assembly (5) comprises a driving gear (51) meshingly connected to the rack (42), a transmission shaft (52) coaxially fixed to the driving gear (51), an active bevel gear (53) coaxially fixed to an end of the transmission shaft (52) away from the driving gear (51), a first hinge shaft (54) rotatably connected to the clamping block (31), a passive bevel gear (55) coaxially fixed to the first hinge shaft (54), and a second hinge shaft (55) elastically hinged to the stopper (32). The driving bevel gear (53) is meshedly connected with the driven bevel gear (55), and the first hinge shaft (54) and the second hinge shaft (56) are fixedly connected. When the clamping block (31) moves from the lowest position to the highest position, the stopper (32) gradually turns in a direction close to the clamping block (31). When the stopper (32) is in a free state and the clamping block (31) is at the highest position, the stopper (32) is in contact with the clamping block (31).

7. A metal guardrail welding device according to claim 1, characterized in that: The loading assembly (8) comprises a conveyor belt (81) fixedly connected to the machine body (1) and an electric push rod (82) fixedly connected to the machine body (1) and located above the conveyor belt (81); the conveyor belt (81) is perpendicular to the moving direction of the transverse tube (92); one end of the conveyor belt (81) is located inside the machine body (1) and the other end extends outside the machine body (1).

8. A metal guardrail welding device according to claim 7, characterized in that: A baffle plate (316) is fixedly connected to one end of the bottom surface of the clamping block (31) close to the baffle plate (32), and the height of the baffle plate (316) is not lower than the moving height of the clamping block (31).

9. A metal guardrail welding device according to claim 1, characterized in that: The machine body (1) is fixedly connected with a guide frame (14) at one end of the cooling tube (6) facing the moving direction of the transverse tube (92); the guide frame (14) is plug-fitted with the transverse tube (92) and the end of the guide frame (14) away from the cooling tube (6) is flared.

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