An automatic generation system for multi-head welding one-step forming of flat plate collector core

Abstract

The present invention is an automatic one-time forming system for multi-head welding of the core of a flat plate collector, including a core transmission platform and turnover devices at both ends, wherein a welding device is provided in the middle; the core transmission platform includes an upper transmission layer and a lower transmission layer, and the turnover device includes a lifting chain and a lifting plate, and the lifting plate docks with the upper transmission layer when it reaches the upper limit position, and docks with the lower transmission layer when the lifting plate reaches the lower limit position. The multi-head welding machine uses multiple welding heads to simultaneously weld all the welds at both ends of the core at the same temperature and in a one-time manner, with high welding efficiency and good weld quality. The core is placed on the transmission plate, the weld docking is accurate, and the fixation is stable and reliable. The transmission plate performs a full circle of circulation between the core transmission platform and the turnover device, which greatly saves labor and has a high degree of automation. During the welding process, the welding temperature is preset according to needs, the ratio of oxygen and fuel gas is automatically controlled, the welding temperature and welding state are regulated, and the mixed gas is fully burned, with the advantages of high energy utilization rate.

Description

Technical Field

[0001] The invention relates to the technical field of automatic welding forming devices, and in particular to an automatic generation system for multi-head welding and one-time forming of a flat-plate collector core. Background Art

[0002] In the thermal utilization of solar energy, the key is to convert the sun's radiation energy into thermal energy. Since solar energy is relatively dispersed, we must try to concentrate it. Therefore, solar collectors are the key part of various solar energy utilization devices.

[0003] The flow channel of the solar collector plate core is divided into a main channel and a branch channel. The main channel uses a horizontal thick copper tube as the main channel, while the branch channel uses a number of slender copper tubes arranged perpendicular to the thick copper tube. In the prior art, the slender copper tubes are respectively connected to the reserved welding holes on the thick copper tube. Because there are many slender copper tubes and many ring welds connected to the main channel, they are usually welded one by one manually. The existing welding equipment welds along both sides of the copper tube, so that both ends of the slender copper tube are welded to the thick copper tube. There are many slender copper tubes. After one side of the slender copper tube is welded to the thick copper tube, the other side of the slender copper tube is welded to the thick copper tube. This results in a long time and high production cost. The equipment hoisting and flipping process is time-consuming and labor-intensive. The uneven temperature during the welding process causes the welding quality of the weld to be uneven, and the weld is prone to defects such as pores. At the same time, in the batch industrial production process, the labor input is large, a lot of time is wasted, and the production efficiency is extremely low. In addition, the slender copper tube is soft and easy to deform, the docking accuracy is poor, and it is easy to shift.

[0004] Therefore, in order to shorten the welding time, improve the weld quality, reduce the manual input of the core during the transfer process, and effectively prevent the core from deforming and dislocating during the transfer process, a flat-plate collector core multi-head welding one-time forming automatic generation system is provided. Summary of the invention

[0005] The purpose of the present invention is to provide a flat-plate collector core multi-head welding one-time forming automatic generation system to solve the problems raised in the above background technology. The present invention has the advantages of automatically completing all welds at the same temperature at the same time and using mechanical transmission to solve the smooth transfer of the core.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a flat plate collector core multi-head welding one-time forming automatic generation system, comprising a core transmission platform and a turnover device for lifting and lowering arranged at both ends of the core transmission platform, a welding device is arranged in the middle of the core transmission platform, a core welding space is formed between the welding device and the core transmission platform, and a core limiting device is arranged on the core transmission platform directly below the welding space;

[0007] The plate core transmission platform comprises an upper transmission layer and a lower transmission layer, and the turnover device comprises a lifting chain and a lifting plate driven by the lifting chain. When the lifting plate reaches the upper limit position, it docks with the upper transmission layer, and when the lifting plate reaches the lower limit position, it docks with the lower transmission layer. The turnover device on one side of the plate core transmission platform is set as a loading part, and the turnover device on the other side of the plate core transmission platform is set as an empty part. A plurality of conveying plates are arranged on the plate core transmission platform, and a plate core supporting device is arranged on the conveying plate. The conveying plate moves to the loading part to load the plate core to be welded, and the conveying plate moves along the upper transmission layer to the plate core welding space. The welding device completes the plate core forming welding, and the conveying plate continues to move to one end of the upper transmission layer close to the empty part, and the plate core is moved away from the conveying plate, and the empty conveying plate moves along the empty part and the lower transmission layer in turn, and then returns to the loading part again to complete a full circle of circulation. The conveying plate supports and transports the plate core, is fixed and stable, and is convenient and easy to load and transfer. The plate core transfer has a high degree of automation.

[0008] The welding device includes a welding machine bracket, on which are provided two crossbeam slide rails parallel to the width direction of the plate core transmission platform, on which are slidably provided two multi-head welding machines facing back to back and symmetrically arranged, the welding parts of the multi-head welding machines are all arranged outward, and the multi-head welding machine includes two sliding seats that slide with the crossbeam guide rails, and a driving device is provided on one side of the crossbeam guide rail; the multi-head welding machine can move on the crossbeam slide rail according to the size of the plate core, ensuring that the multi-head welding machine is accurately aligned with the weld of the plate core, with high weld quality and precise positioning.

[0009] A welding mechanism and a wire feeding device are provided on the sliding seat, a gas supply device and a flame temperature controller are provided above the wire feeding device, an electrical box is provided on one side of the flame temperature controller, a controller is provided in the electrical box, the controller and the flame temperature controller are connected through a communication line, the welding mechanism comprises a welding gun support plate, a plurality of vertical welding guns are provided at equal intervals on the outside of the welding gun support plate, a vertical servo cylinder is provided on the inside of the welding gun support plate, the welding gun support plate is fixed on the telescopic rod of the vertical servo cylinder, each welding gun comprises a group of two welding gun heads arranged in a Y shape, a welding wire head is provided between each group of welding gun heads, the upper part of the welding wire head is connected to the wire feeding device, each welding gun is connected to a mixed gas pipe, and the mixed gas pipes are all connected to the gas supply device. The flame temperature controller is any flame temperature controller used in the system disclosed in the prior art; all welding guns are fixed on the welding gun support plate to ensure that all welding guns move synchronously, the welding guns are connected to the mixed gas pipe, the ratio of the mixed gas in each welding gun is the same, and they are controlled by the same flame temperature controller to ensure that the flame temperature of each welding gun is the same and the movement trajectory is the same during welding, and all welds on the plate core are welded at the same time.

[0010] Preferably, the upper transmission layer and the lower transmission layer each include three sets of rail-type transmission chains arranged in parallel with each other, with driving wheels and driven wheels at both ends of the rail-type transmission chain, the driving wheels are located on the same side of the rail-type transmission chain, the three driving wheels of the upper transmission layer are coaxial and penetrated by an upper synchronous shaft, the three driving wheels of the lower transmission layer are coaxial and penetrated by a lower synchronous shaft, an upper transmission motor is arranged at one end of the upper synchronous shaft, and a lower transmission motor is arranged at one end of the lower synchronous shaft. The upper transmission motor and the lower transmission motor drive the rail-type transmission chain to rotate a full circle respectively, and the transmission plate is transferred at a uniform speed and smoothly, which saves labor and has high transfer efficiency.

[0011] More preferably, the turnover device further comprises four supporting columns, two supporting columns on the same side of the plate core transmission platform are set as a group, each supporting column is fixedly arranged with a lifting chain, the lifting chain is meshed with a driving sprocket and a driven sprocket at the upper and lower ends, the driving sprocket and the driven sprocket are fixed on the supporting columns up and down, a vertical slide bar is provided on the inner side of the supporting column, a lifting slider is slidably matched on the vertical slide bar, a connecting plate is horizontally provided between the lifting slider and the lifting chain, the connecting plate is fixedly connected to the four corners of the lifting plate, a synchronous shaft is provided between the same group of driving sprockets, and a lifting motor is provided at one end of the synchronous shaft. The lifting plate is lifted and lowered smoothly, with a high degree of automation.

[0012] More preferably, both ends and the middle of the lifting plate are provided with long strip openings parallel to the length direction of the plate core transmission platform, and a belt conveyor is provided flush with the long strip opening. The belt conveyor moves the transmission plate from the turnover device to the upper transmission layer and the lower transmission layer respectively. A driving wheel is provided at one end of the belt conveyor and a positioning wheel is provided at the other end. The driving wheel is connected to the belt drive motor. The belt conveyor pushes the transmission plate loaded on the lifting plate to the plate core transmission platform, which saves labor for transfer and is accurate in docking and positioning.

[0013] More preferably, the wire feeding device includes a wire reel, one side of the wire reel is provided with two groups of wire feeding wheels arranged in pairs, the same group of wire feeding wheels rotate towards each other, and a gap is formed between the same group of wire feeding wheels for the welding wire to pass through, and the welding wire output side of the wire feeding wheel is provided with a plurality of vertically arranged wire guide tubes, and the end of each wire guide tube is connected to a corresponding welding wire head, and the welding wire passes through the wire guide tubes and passes out of the welding wire head, and a synchronization plate is provided on one side of the welding wire head, and a plurality of welding wire heads are fixed on the synchronization plate at equal intervals, and a horizontal servo cylinder is provided on the other side of the synchronization plate, and the connecting plate is fixed to the telescopic rod of the servo cylinder. The automatic wire feeding device automatically pushes the welding wire out of the welding wire head to ensure sufficient wire supply during the welding process.

[0014] More preferably, the gas supply device includes a horizontally arranged oxygen storage tank and a gas storage tank, a mixed gas storage tank is arranged below the oxygen storage tank and the gas storage tank, two air inlets and a plurality of air outlets are arranged on the mixed gas storage tank, an oxygen outlet is arranged on the oxygen storage tank, an oxygen pipe is arranged between the oxygen outlet and an air inlet on the mixed gas storage tank, a gas outlet is arranged on the gas storage tank, a gas pipe is arranged between the gas outlet and another air inlet on the mixed gas storage tank, a flow regulating valve and a one-way valve are arranged on the gas pipe and the oxygen pipe, the flow regulating valve is connected to the controller through a communication line, and each air outlet on the mixed gas storage tank is connected to the mixed gas pipe. The controller controls the opening and closing of the flow regulating valve to ensure that the gas and oxygen are automatically mixed in the required proportion, the gas flow rate and the gas mixing ratio coming out of each mixed gas pipe are consistent, and the size and temperature of the flame are conveniently controlled.

[0015] More preferably, the driving device includes a driving motor and a welding machine sprocket arranged at the end of the crossbeam guide rail, the crossbeam guide rail is arranged in parallel with the welding machine sprocket, the driving motor drives the welding machine sprocket, a crossbeam slider is arranged on the crossbeam guide rail, and the crossbeam slider is fixedly connected to the multi-head welding machine on the corresponding side. The driving motor and the welding machine sprocket cooperate to drive the multi-head welding machine on the corresponding side to move along the crossbeam guide rail, and the position of the multi-head welding machine can be adjusted at any time to accurately align the plate core weld.

[0016] More preferably, the core support device includes a plurality of main pipe support plates respectively arranged at both ends of the transmission plate, and a plurality of main pipe support plates at one end of the transmission plate are arranged in a row and parallel to the length direction of the core transmission platform, and a shelf groove is provided on the upper part of the main pipe support plate to match the outer wall of the core pipe. The support is stable and will not slide relative to each other. Two main pipe pressure strip assemblies are provided on the outer side of the main pipe support plates arranged in a row, and the main pipe pressure strip assemblies include a support block, a threaded pin is provided above the support block, and a horizontally arranged rotating pressure strip is spirally provided on the threaded pin; the rotating pressure strip presses the core pipe and fixes the core vertically to ensure that the core is relatively still during welding.

[0017] More preferably, the core support device also includes several rows of branch pipe positioning plates parallel to the main pipe support plates between the two rows of main pipe support plates, and the branch pipe positioning plates are evenly spaced with limiting grooves corresponding to the outer walls of the core branch pipes, and the limiting grooves on each branch pipe positioning plate correspond to each other.

[0018] More preferably, the plate core limit device includes four limit switches and positioning telescopic switches arranged on the plate core transmission platform below the multi-head welding machine. The limit switches are located on both sides of the transmission plate and are symmetrically arranged in pairs. The positioning telescopic switch includes a servo motor, and the servo motor is provided with a positioning telescopic rod arranged vertically upward. The transmission plate is provided with a positioning hole, and the positioning hole corresponds to the shape and position of the positioning telescopic rod. The limit switch and the positioning telescopic switch are opened successively to limit the transmission plate to the position directly below the multi-head welding machine. After the welding is completed, the limit switch and the positioning telescopic switch are closed successively, and the transmission plate continues to move. It saves labor, has a high degree of automation, and is accurate in positioning.

[0019] When loading the core, the conveyor plate moves to the loading part to load the core to be welded. The conveyor plate is provided with a core support device. The core main pipe and the core branch pipe are butt-jointed before loading, and the weld is fixed by spot welding. The spot-welded core to be welded is placed on the conveyor plate, and the main pipes at both ends of the core are respectively placed in the shelf grooves on the two rows of main pipe support plates. The rotating pressure strip is twisted inward, and a group of rotating pressure strips on the same side press the core main pipe. The displacement of the core is completely limited vertically. When the core main pipe falls into the shelf groove on the main pipe support plate, the core branch pipe falls into the limiting groove on each row of branch pipe positioning plates. After the core main pipe is fixed, the core branch pipe is fixed accordingly. The core and the conveyor plate move synchronously;

[0020] The upper transmission motor drives the upper synchronous shaft to rotate forward, and the guide rail transmission chain transmits forward, driving the transmission plate to transmit forward along the plate core transmission platform; the transmission plate moves along the upper transmission layer to the plate core welding space, and a plate core limiting device is provided on the plate core transmission platform directly below the welding space. When the transmission plate moves to the plate core welding space formed between the welding device and the plate core transmission platform, the limit switch on the front side of the transmission plate opens, and the transmission plate stops at the plate core welding space. Positioning holes are provided on the transmission plate to locate the positioning telescopic rod, and the servo motor rotates forward, the positioning telescopic rod extends from the positioning hole, and the transmission plate is fixed in the horizontal direction.

[0021] The length of the plate core to be welded has various specifications. The plate core to be welded is loaded on the conveyor plate in the loading part. The conveyor plate moves along the upper transmission layer to the plate core welding space. The motor starts, driving the welding machine sprocket to rotate, driving the multi-head welding machine to move horizontally on the crossbeam slide rail, and adjusting the position to face the weld position between the plate core main pipe and the plate core branch pipe for welding.

[0022] Before welding, the welding temperature is set on the flame controller and fed back to the controller, which receives and stores the preset temperature signal. The controller controls the opening degree and opening and closing time of the flow control valve through calculation and analysis, controls the mixing ratio of the fuel gas and oxygen, and the gas flow of the mixed gas, thereby controlling the welding temperature. When the welding temperature reaches the preset temperature, the controller controls the mixing ratio of the mixed gas and the gas flow of the mixed gas to remain unchanged, and the temperature remains constant.

[0023] When welding starts, the wire feeding wheels rotate towards each other, and the welding wire on the wire reel is automatically drawn by the wire feeding wheels. When welding starts, the welding wire is melted into welding wire molten liquid by the high-temperature flame, and the horizontal servo cylinder is started. The servo position of the servo cylinder is preset according to the weld width of each plate core main pipe and plate core branch pipe. The telescopic rod of the servo cylinder extends or retracts, driving the synchronous plate to perform horizontal reciprocating motion, and the welding wire head fixed on the synchronous plate moves synchronously with the connecting plate;

[0024] The mixed gas storage tank of the gas supply device is filled with mixed gas that has been mixed in proportion. When welding starts, the mixed gas is released from the welding gun head through the mixed gas pipe. The external fire source is used to ignite each group of welding gun heads at the same time. The flame of the welding gun head melts the welding wire extending from the welding wire head at a high temperature. After the welding wire melts, it drips on the weld of the plate core main pipe and the plate core branch pipe. At this time, the vertical servo cylinder and the horizontal servo cylinder are started at the same time, and the welding wire head moves at a uniform speed along the length of the weld. The molten welding wire flows from the upper ends of the pipe body to the weld below the pipe body, and the gap is welded by the residual temperature of the molten welding wire. At the same time, a group of welding gun heads make intermittent up and down movements in the vertical direction with the welding wire head as the midpoint, continuously heating the welding wire. The welding wire is always in a preheated and melted state, and the welding is continuous. After the welding is completed, the horizontal servo cylinder retracts, and the welding wire head returns to the initial welding position, and the plate core is welded.

[0025] After the welding device completes the core forming welding, the servo motor reverses, the positioning telescopic rod retracts from the positioning hole, the limit switch is closed, and the conveyor plate continues to move forward along the core conveying platform. When it moves to the end of the upper conveying layer and manually unloads the formed core, the rotating pressure strip is twisted outward to release the restriction on the core main pipe, and the formed core is removed from the conveyor plate.

[0026] The unloaded conveyor plate continues to move toward the unloaded part, the belt drive motor on the lifting plate of the unloaded part is started, and the belt conveyor moves in the same direction as the upper transmission layer, and the conveyor plate completely enters the lifting plate of the unloaded part, and the lifting motor reverses, driving the active sprocket to drive the lifting chain to reverse, and the lifting slider at the top moves downward along the vertical slide bar, driving the lifting plate to synchronously descend; when the lifting plate reaches the lower limit position, the belt conveyor rotates in the direction of the lower transmission layer, driving the conveyor plate to move in the direction of the lower transmission layer, and the conveyor plate moves along the lower transmission layer to the upper material part, and the belt drive motor on the lifting plate of the feeding part is started, and the belt conveyor drives the conveyor plate to enter the lifting plate of the feeding part, completing a full circle of circulation; the lifting plate returns to the upper limit position of the feeding part again, and another plate core to be welded is manually loaded on the conveyor plate on the lifting plate, and a full circle of circulation is performed again.

[0027] Compared with the prior art, the invention has the following beneficial effects: the multi-head welding machine uses multiple welding heads to simultaneously weld all the welds at both ends of the plate core at the same temperature and in the same time, with high welding efficiency and good weld quality. The plate core is placed on the conveyor plate, the welds are accurately butted, and the fixation is stable and reliable. The conveyor plate performs a full circle of circular motion between the plate core transmission platform and the turnover device, which greatly saves labor and has a high degree of automation. During the welding process, the welding temperature is preset according to needs, the ratio of oxygen and fuel gas is automatically controlled, the welding temperature and welding state are regulated, the mixed gas is fully burned, and the energy utilization rate is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the overall assembly of the present invention;

[0029] Figure 2 It is a schematic structural diagram of the welding device of the present invention;

[0030] Figure 3 It is an enlarged schematic diagram of node I of the present invention;

[0031] Figure 4 It is a schematic diagram of the assembly structure of the transmission plate of the present invention;

[0032] Figure 5 A top view of the lifting plate of the present invention;

[0033] Figure 6 It is a front view of the lifting plate of the present invention;

[0034] Figure 7 It is a schematic diagram of the back side of the multi-head welding machine of the present invention;

[0035] Figure 8 It is an enlarged schematic diagram of node II of the present invention. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] Please see attached Figure 1-2 , a flat plate collector core multi-head welding one-time forming automatic generation system, comprising a core transmission platform 2 and a turnover device 1 for lifting and lowering arranged at both ends of the core transmission platform 2, a welding device 3 is arranged in the middle of the core transmission platform, and a core welding space is formed between the welding device and the core transmission platform;

[0038] A core limit device 5 is provided on the core transmission platform directly below the welding space, and the core limit device 5 includes four limit switches 501 and positioning telescopic switches 502 arranged on the core transmission platform 2 below the multi-head welding machine. The limit switches 501 are located on both sides of the transmission plate and are arranged symmetrically with each other. The positioning telescopic switches 502 include a servo motor, and the servo motor is provided with a positioning telescopic rod arranged vertically upward. The transmission plate 4 is provided with a positioning hole, and the positioning hole corresponds to the shape and position of the positioning telescopic rod. The transmission plate 4 moves unidirectionally along the core transmission platform 2. When the transmission plate moves to the core welding space formed between the welding device 3 and the core transmission platform, the limit switch 501 on the front side of the transmission plate 4 is opened, and the transmission plate 4 stops at the core welding space. The transmission plate is provided with a positioning hole to locate the positioning telescopic rod. The servo motor rotates forward, and the positioning telescopic rod extends from the positioning hole. The transmission plate is fixed in the horizontal direction. When the welding is completed, the servo motor reverses, and the positioning telescopic rod retracts from the positioning hole. At the same time, the limit switch is closed, and the transmission plate 4 continues to move forward along the core transmission platform.

[0039] Please see attached Figure 3 The core transmission platform 2 includes an upper transmission layer 201 and a lower transmission layer 202. Both the upper transmission layer and the lower transmission layer include three sets of rail-type transmission chains 203 arranged in parallel with each other. A driving wheel 232 and a driven wheel 235 are arranged at both ends of the rail-type transmission chain 203. The driving wheel 232 is located on the same side of the rail-type transmission chain 203. The three driving wheels of the upper transmission layer 201 are coaxial and penetrated by an upper synchronous shaft 163. The three driving wheels of the lower transmission layer 202 are coaxial and penetrated by a lower synchronous shaft. An upper transmission motor is arranged at one end of the upper synchronous shaft 163, and a lower transmission motor 233 is arranged at one end of the lower synchronous shaft. The upper transmission motor drives the upper synchronous shaft to rotate forward, and the rail-type transmission chain 203 is driven forward, driving the transmission plate to be transmitted forward along the core transmission platform; the transmission motor drives the lower synchronous shaft 234 to rotate reversely, and the rail-type transmission chain 203 is driven reversely, driving the transmission plate to be transmitted reversely along the core transmission platform.

[0040] The turnover device 1 includes a lifting chain 106 and a lifting plate 107 driven by the lifting chain. When the lifting plate 107 reaches the upper limit position, it docks with the upper transmission layer 201. When the lifting plate 107 reaches the lower limit position, it docks with the lower transmission layer. The turnover device on one side of the core transmission platform 2 is set as a loading part 102, and the turnover device on the other side of the core transmission platform 2 is set as an empty part 101. The turnover device 1 also includes four supporting columns 109. Two supporting columns 109 on the same side of the core transmission platform are set as a group, and each supporting column 109 is connected to The lifting chain 106 is fixedly arranged, and a driving sprocket 162 and a driven sprocket 161 are meshed at the upper and lower ends of the lifting chain 106. The driving sprocket 162 and the driven sprocket 161 are fixed on the supporting columns up and down. A vertical slide bar 104 is provided on the inner side of the supporting column 109, and a lifting slider 141 is slidably provided on the vertical slide bar 104. A connecting plate is horizontally provided between the lifting slider 141 and the lifting chain 106, and the connecting plate is fixedly connected to the four corner edges of the lifting plate. A synchronous shaft is provided between the same group of driving sprockets, and a lifting motor is provided at one end of the synchronous shaft.

[0041] When the lifting motor 108 rotates forward, the driving sprocket 162 drives the lifting chain 106 to rotate forward, and the lifting slider at the bottom moves upward along the vertical slide bar, driving the lifting plate 107 to rise synchronously; a plurality of conveying plates 4 are provided on the plate core transmission platform. When the conveying plate 4 enters the turnover device area, the conveying plate is placed on the lifting plate 107. As the lifting plate 107 moves up or down, the lifting plate 107 is located at the upper limit position of the loading part, and the plate core to be welded is manually loaded on the conveying plate 4 on the lifting plate. Both ends and the middle of the lifting plate 107 are provided with long strip openings parallel to the length direction of the plate core transmission platform. A belt conveyor 171 is provided flush with the long strip opening. The belt conveyor 171 moves the conveying plate from the turnover device to the upper transmission layer 201 and the lower transmission layer 202 respectively. A driving wheel 174 is provided at one end of the belt conveyor, and a positioning wheel 172 is provided at the other end. The driving wheel is connected to the belt drive motor. The belt drive motor on the lifting plate of the loading part 102 is started, and the belt conveyor 171 rotates toward the board core transmission platform, driving the transmission plate 4 to move to the upper transmission layer. After the transmission plate enters the upper transmission layer 201, it moves at a constant speed along the guide rail transmission chain 203 until it enters the board core welding space, and a molded board core is obtained by welding. The molded board core continues to move at a constant speed on the upper transmission layer; until the end of the upper transmission layer, the molded board core is manually removed, and the transmission plate is turned into an unloaded state.

[0042] Please see attached Figure 5-6, the unloaded conveyor plate continues to move toward the unloaded part 101, the belt drive motor on the lifting plate 107 of the unloaded part is started, and the belt conveyor 171 moves in the same direction as the upper transmission layer 201, and the conveyor plate 4 completely enters the lifting plate 107 of the unloaded part 101, and the lifting motor reverses, driving the active sprocket to drive the lifting chain 106 to reverse, and the lifting slider at the top moves downward along the vertical slide bar 104, driving the lifting plate 107 to descend synchronously; when the lifting plate reaches the lower limit position, the belt conveyor 171 rotates in the direction of the lower transmission layer, driving the conveyor plate to move in the direction of the lower transmission layer, and the conveyor plate 4 moves along the lower transmission layer to the upper material part, and the belt drive motor 173 on the lifting plate of the feeding part is started, and the belt conveyor 171 drives the conveyor plate to enter the lifting plate of the feeding part.

[0043] Please see attached Figure 4 The conveying plate 4 is provided with a core support device, which includes a plurality of main pipe support plates 403 respectively arranged at both ends of the conveying plate 4. The plurality of main pipe support plates 403 at one end of the conveying plate are arranged in a row and parallel to the length direction of the core conveying platform. The upper part of the main pipe support plate 403 is provided with a shelf groove 431 that matches the outer wall of the core main pipe. The core main pipe and the core branch pipe are butt-jointed before loading, and the weld is fixed by spot welding. The core to be welded is placed on the conveying plate, and the main pipes at both ends of the core are respectively placed in the shelf grooves on the two rows of main pipe support plates. Two main pipe pressure strip assemblies 402 are arranged on the outer side of the main pipe support plates arranged in a row. The main pipe pressure strip assemblies 402 include a support block, a threaded pin is arranged above the support block, and a horizontally arranged rotating pressure strip 421 is spirally arranged on the threaded pin; the rotating pressure strip 421 is screwed inward, and a group of rotating pressure strips on the same side press the core main pipe, and the displacement of the core is completely limited in the vertical direction.

[0044] The core support device also includes a plurality of rows of branch pipe positioning plates 401 parallel to the main pipe support plates 403 between two rows of main pipe support plates. The branch pipe positioning plates 401 are provided with limit grooves 411 corresponding to the outer wall of the core branch pipe at equal intervals, and the limit grooves 411 on each branch pipe positioning plate correspond to each other. When the core main pipe falls into the shelf groove 431 on the main pipe support plate, the core branch pipes fall into the limit grooves 411 on each row of branch pipe positioning plates. After the core main pipe is fixed, the core branch pipes are fixed accordingly. The core moves synchronously with the conveyor plate; when the core welding is completed, it moves to the end of the upper transmission layer 201. When the formed core is manually unloaded, the rotating pressure strip is twisted outward, and the rotating pressure strip 421 releases the restriction on the core main pipe, and the formed core is removed from the conveyor plate.

[0045] The conveyor plate 4 moves to the loading part to load the plate core to be welded, and the conveyor plate moves along the upper transmission layer to the plate core welding space, and the welding device 3 completes the plate core forming welding, and the conveyor plate continues to move to the upper transmission layer near one end of the empty part, and the plate core is moved away from the conveyor plate, and the empty conveyor plate moves along the empty part 101 and the lower transmission layer in turn, and then returns to the loading part again, completing a full circle of circulation;

[0046] Please see attached Figure 2 The welding device 3 includes a welding machine bracket, on which are provided two beam slide rails 301 parallel to the width direction of the plate core transmission platform, on which are provided two multi-head welding machines facing each other and symmetrically arranged on the beam slide rail 301, and the welding parts of the multi-head welding machines are all arranged outward, and the multi-head welding machine includes two sliding seats slidably matched with the beam guide rail 301, and a driving device 6 is provided on one side of the beam guide rail 301, and the driving device 6 includes a driving motor and a welding machine sprocket arranged at the end of the beam guide rail, the beam guide rail 301 is arranged parallel to the welding machine sprocket, and the driving motor drives the welding machine sprocket, and a beam slider 311 is provided on the beam guide rail 301, and the beam slider is fixedly connected to the multi-head welding machine on the corresponding side. The length of the plate core to be welded has various specifications. The plate core to be welded is loaded on the conveyor plate in the loading part. The conveyor plate moves along the upper transmission layer to the plate core welding space. The motor starts, driving the welding machine sprocket to rotate, driving the multi-head welding machine to move horizontally on the crossbeam slide rail, and adjusting the position to face the weld position between the plate core main pipe and the plate core branch pipe for welding.

[0047] Please see attached Figure 7-8 A welding mechanism and a wire feeding device 309 are provided on the sliding seat, and the wire feeding device 309 includes a wire reel 391. Two groups of wire feeding wheels 392 are arranged in pairs on one side of the wire reel 391. The wire feeding wheels 392 of the same group rotate towards each other, and a gap for the welding wire 393 to pass through is formed between the wire feeding wheels of the same group. The wire feeding wheels rotate towards each other, and the welding wire on the wire reel is automatically drawn by the wire feeding wheels. A plurality of vertically arranged wire guide tubes 307 are provided on the welding wire output side of the wire feeding wheel, and the end of each wire guide tube 307 is connected to the corresponding welding wire head 371. The welding wire passes through the wire guide tubes 307 and passes out from the welding wire head 371 respectively. A synchronization plate is provided on one side of the welding wire head, and a plurality of welding wire heads are fixed on the synchronization plate at equal intervals. A transverse servo cylinder 302 is provided on the other side of the synchronization plate, and the connecting plate 105 is fixed to the telescopic rod of the servo cylinder. When welding starts, the welding wire is melted into molten welding wire by the high-temperature flame, and the horizontal servo cylinder 302 is started. The servo position of the servo cylinder is preset according to the weld width of each plate core main pipe and plate core branch pipe. The telescopic rod of the servo cylinder extends or retracts, driving the synchronous plate to perform horizontal reciprocating motion. The welding wire head fixed on the synchronous plate moves synchronously with the synchronous plate to ensure that the molten liquid welding wire is evenly distributed on the weld and the welding is complete.

[0048] An air supply device and a flame temperature controller 306 are provided above the wire feeding device. An electrical box is provided on one side of the flame temperature controller. A controller is provided in the electrical box 305. The controller is connected to the flame temperature controller 306 via a communication line. The welding temperature is set on the flame controller and fed back to the controller. The controller receives and stores the preset temperature signal.

[0049] The gas supply device includes an oxygen storage tank 304 and a gas storage tank 344 arranged horizontally, a mixed gas storage tank 341 is arranged below the oxygen storage tank 304 and the gas storage tank 344, two air inlets and a plurality of air outlets are arranged on the mixed gas storage tank, an oxygen outlet is arranged on the oxygen storage tank, an oxygen pipe is arranged between the oxygen outlet and an air inlet on the mixed gas storage tank, a gas outlet is arranged on the gas storage tank, a gas pipe is arranged between the gas outlet and another air inlet on the mixed gas storage tank, a flow regulating valve 343 and a one-way valve 342 are arranged on the gas pipe and the oxygen pipe, the flow regulating valve 343 is connected to the controller through a communication line, and each air outlet on the mixed gas storage tank 341 is connected to the mixed gas pipe. The controller controls the opening degree and opening and closing time of the flow regulating valve through calculation and analysis, controls the mixed gas mixing ratio of the gas and oxygen and the gas flow of the mixed gas, thereby controlling the welding temperature. When the welding temperature reaches the preset temperature, the controller controls the mixed gas mixing ratio and the gas flow of the mixed gas to remain unchanged, and the temperature remains constant.

[0050] The welding mechanism includes a welding gun support plate, and a plurality of vertical welding guns 308 are arranged at equal intervals on the outside of the welding gun support plate. A vertical servo cylinder is arranged on the inside of the welding gun 308 support plate. The welding gun support plate is fixed on the telescopic rod of the vertical servo cylinder. Each welding gun includes a group of two welding gun heads 381 arranged in a Y shape, and a welding wire head 371 is correspondingly provided between a group of welding gun heads. The upper part of the welding wire head 371 is connected to the wire feeding device. Each welding gun is connected to a mixed gas pipe, and the mixed gas pipes are all connected to the gas supply device.

[0051] At the beginning of welding, the mixed gas storage tank 341 of the gas supply device is filled with mixed gas that has been mixed in proportion. At the beginning of welding, the mixed gas is released from the welding gun head 381 through the mixed gas pipe, and each group of welding gun heads is ignited at the same time using an external fire source. The flame of the welding gun head 381 melts the welding wire extending from the welding wire head at a high temperature. After the welding wire melts, it drips on the weld of the plate core main pipe and the plate core branch pipe. At this time, the vertical servo cylinder and the horizontal servo cylinder are started at the same time, and the welding wire head moves at a uniform speed along the length of the weld. The molten welding wire flows from the two ends above the pipe body to the weld below the pipe body, and the gap is welded by the residual heat of the molten welding wire. At the same time, a group of welding gun heads make intermittent up and down movements in the vertical direction with the welding wire head as the midpoint, continuously heating the welding wire. The welding wire is always in a preheated and melted state, and the welding is continuous. After the welding is completed, the horizontal servo cylinder retracts, and the welding wire head returns to the initial welding position, and the plate core is welded.

[0052] The servo motor of the positioning telescopic switch 502 is reversed, the positioning telescopic rod is retracted from the positioning hole, and the limit switch is closed at the same time. The conveying plate continues to move forward along the plate core conveying platform to be unloaded. The above steps are repeated to complete the automatic transfer and welding forming steps of the plate core.

[0053] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the attached claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention. Any figure mark in the claims should not be regarded as limiting the claims involved.

[0054] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A flat-plate collector core multi-head welding one-time forming automatic production system, characterized by: It comprises a core conveying platform (2) and a turnover device (1) arranged at both ends of the core conveying platform for lifting and lowering, a welding device (3) is arranged in the middle of the core conveying platform, a core welding space is formed between the welding device and the core conveying platform, and a core limiting device (5) is arranged on the core conveying platform directly below the welding space; The core transport platform (2) comprises an upper transport layer (201) and a lower transport layer (202); the turnover device (1) comprises a lifting chain (106) and a lifting plate (107) driven by the lifting chain; the lifting plate (107) docks with the upper transport layer (201) when it reaches an upper limit position; and docks with the lower transport layer (202) when the lifting plate (107) reaches a lower limit position; the turnover device on one side of the core transport platform is set as a loading part (102); and the turnover device on the other side of the core transport platform is set as an empty part (10 1), a plurality of conveyor plates (4) are provided on the plate core conveying platform (2), and a plate core supporting device is provided on the conveyor plate (4). The conveyor plate (4) moves to the loading part (102) to load the plate core to be welded, and the conveyor plate (4) moves along the upper conveying layer to the plate core welding space. The welding device completes the plate core forming welding, and the conveyor plate continues to move to the upper conveying layer near one end of the empty part (101), and the plate core is moved away from the conveyor plate, and the empty conveyor plate moves along the empty part and the lower conveying layer in turn, and then returns to the loading part again, completing a full circle of circular motion; The welding device (3) comprises a welding machine bracket, on which two crossbeam guide rails (301) parallel to the width direction of the plate core transmission platform are arranged, on which two multi-head welding machines are slidably arranged in a back-to-back manner and symmetrically arranged, and the welding parts of the multi-head welding machines are all arranged outward, and the multi-head welding machines comprise two sliding seats slidably matched with the crossbeam guide rails, a driving device (6) is arranged on one side of the crossbeam guide rails, a welding mechanism and a wire feeding device (309) are arranged on the sliding seat, a gas supply device and a flame temperature controller (306) are arranged above the wire feeding device (309), and an electrical box (305) is arranged on one side of the flame temperature controller (306). , a controller is provided in the electrical box, and the controller is connected to the flame temperature controller (306) through a communication line, the welding mechanism includes a welding gun support plate, a plurality of vertical welding guns (308) are evenly spaced outside the welding gun support plate, a vertical servo cylinder is provided inside the welding gun support plate, and the welding gun support plate is fixed on the telescopic rod of the vertical servo cylinder, each welding gun (308) includes two welding gun heads (381) arranged in a Y shape, a welding wire head (371) is correspondingly provided between the welding gun heads in the group, and the upper part of the welding wire head is connected to the wire feeding device (309), and each welding gun is connected to a mixed gas pipe, and the mixed gas pipes are all connected to the gas supply device; The upper transmission layer (201) and the lower transmission layer (202) both include three sets of rail-type transmission chains (203) arranged in parallel with each other. A driving wheel (232) and a driven wheel (235) are provided at both ends of the rail-type transmission chain (203). The driving wheel is located on the same side of the rail-type transmission chain (203). The three driving wheels of the upper transmission layer are coaxial and penetrated by an upper synchronous shaft. The three driving wheels of the lower transmission layer are coaxial and penetrated by a lower synchronous shaft (234). An upper transmission motor is provided at one end of the upper synchronous shaft, and a lower transmission motor (233) is provided at one end of the lower synchronous shaft.

2. According to claim 1, the flat-plate collector core multi-head welding one-step forming automatic production system is characterized by: The turnover device (1) further comprises four supporting columns (109), two supporting columns on the same side of the plate core transmission platform are set as a group, each supporting column (109) is fixedly arranged with a lifting chain (106), and a driving sprocket (162) and a driven sprocket (161) are meshed at the upper and lower ends of the lifting chain (106), and the driving sprocket (162) and the driven sprocket (161) are fixed on the supporting columns up and down, and a vertical slide bar (104) is provided on the inner side of the supporting column, and a lifting slider (141) is slidably matched on the vertical slide bar (104), and a connecting plate (105) is horizontally provided between the lifting slider and the lifting chain, and the connecting plate (105) is fixedly connected to the four corner edges of the lifting plate (107), and a synchronous shaft (163) is provided between the driving sprockets in the same group, and a lifting motor (108) is provided at one end of the synchronous shaft.

3. The flat-plate collector core multi-head welding one-step forming automatic production system according to claim 2 is characterized by: The lifting plate (107) is provided with long strip openings parallel to the length direction of the plate core transmission platform at both ends and the middle part, and a belt conveyor (171) is provided flush with the long strip opening. The belt conveyor moves the transmission plate from the turnover device to the upper transmission layer and the lower transmission layer respectively. A driving wheel (174) is provided at one end of the belt conveyor, and a positioning wheel (172) is provided at the other end. The driving wheel is connected to a belt drive motor (173).

4. The flat-plate collector core multi-head welding one-step forming automatic production system according to claim 1, characterized in that: The wire feeding device (309) comprises a wire reel (391), one side of the wire reel is provided with two groups of wire feeding wheels (392) arranged in pairs, the wire feeding wheels (392) of the same group rotate towards each other, and a gap is formed between the wire feeding wheels (392) of the same group for the welding wire (393) to pass through, a plurality of vertically arranged wire guide tubes (307) are provided on the welding wire output side of the wire feeding wheels (392), the end of each wire guide tube (307) is connected to a corresponding welding wire head (371), and the welding wire passes through the wire guide tube and passes out from the welding wire head (371), a synchronization plate is provided on one side of the welding wire head (371), and a plurality of welding wire heads are fixed on the synchronization plate at equal intervals, and a transverse servo cylinder (302) is provided on the other side of the synchronization plate, and the connecting plate is fixed to the telescopic rod of the servo cylinder.

5. According to claim 1, the flat-plate collector core multi-head welding one-step forming automatic production system is characterized by: The gas supply device comprises an oxygen storage tank (304) and a gas storage tank (344) arranged horizontally, a mixed gas storage tank (341) being arranged below the oxygen storage tank and the gas storage tank, two gas inlets and a plurality of gas outlets being arranged on the mixed gas storage tank, an oxygen outlet being arranged on the oxygen storage tank, an oxygen pipe being arranged between the oxygen outlet and an gas inlet on the mixed gas storage tank, a gas outlet being arranged on the gas storage tank, a gas pipe being arranged between the gas outlet and another gas inlet on the mixed gas storage tank, a flow regulating valve (343) and a one-way valve (342) being arranged on the gas pipe and the oxygen pipe, the flow regulating valve (343) being connected to a controller via a communication line, and each gas outlet on the mixed gas storage tank (341) being connected to the mixed gas pipe.

6. The flat-plate collector core multi-head welding one-step forming automatic production system according to claim 1, characterized in that: The driving device (6) comprises a driving motor and a welding machine sprocket arranged at the end of a crossbeam guide rail. The crossbeam guide rail and the welding machine sprocket are arranged in parallel. The driving motor drives the welding machine sprocket. A crossbeam slider (311) is provided on the crossbeam guide rail. The crossbeam slider is fixedly connected to the multi-head welding machine on the corresponding side.

7. The flat-plate collector core multi-head welding one-step forming automatic production system according to claim 1, characterized in that: The board core support device comprises a plurality of main pipe support plates (403) respectively arranged at both ends of the transmission plate, wherein the plurality of main pipe support plates at one end of the transmission plate are arranged in a row and parallel to the length direction of the board core transmission platform, wherein the upper part of the main pipe support plates is provided with a shelf groove (431) matched with the outer wall of the board core main pipe, and the outer side of the main pipe support plates arranged in a row is provided with two main pipe pressure strip assemblies (402), and the main pipe pressure strip assemblies comprise a support block, a threaded pin is provided above the support block, and a horizontally arranged rotating pressure strip (421) is spirally provided on the threaded pin.

8. The flat-plate collector core multi-head welding one-step forming automatic production system according to claim 7, characterized in that: The plate core support device also includes a plurality of rows of branch pipe positioning plates (401) arranged between the two rows of main pipe support plates and parallel to the main pipe support plates, and the branch pipe positioning plates are provided with limiting grooves (411) corresponding to the outer walls of the plate core branch pipes at equal intervals, and the limiting grooves on each branch pipe positioning plate correspond to each other.

9. The flat-plate collector core multi-head welding one-step forming automatic production system according to claim 1, characterized in that: The plate core limiting device (5) comprises four limit switches (501) and positioning telescopic switches (502) arranged on a plate core transmission platform below the multi-head welding machine, the limit switches being located on both sides of the transmission plate and being arranged symmetrically in pairs, the positioning telescopic switches (502) comprising a servo motor, the servo motor being provided with a positioning telescopic rod arranged vertically upward, the transmission plate being provided with a positioning hole, the positioning hole corresponding to the positioning telescopic rod in shape and position.

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