A welding device

Abstract

The utility model provides a kind of welding device, it is related to air conditioning technical field, it solves the technical problem that evaporator artificial flame welding labor intensity is big, quality is unstable, production efficiency is low.The welding device, including at least a set of profiling welding module and positioning tool, to be welded product is placed on positioning tool;All profiling welding module is arranged in the positioning tool periphery side, to respectively correspond the different welding area of to be welded product;Profiling welding module includes support tool holder, positioner assembly, profiling fire row;Positioner assembly is installed on support tool holder;Profiling fire row is connected with positioner assembly, can be moved under the drive of positioner assembly.The utility model can realize the overall welding of specific model evaporator component, can greatly shorten the welding time of specific model evaporator, improve product production efficiency, use evaporator overall welding technology improves welding quality consistency, greatly reduces staff work intensity.

Description

Technical Field

[0001] This utility model relates to the field of air conditioning technology, and in particular to a welding device. Background Technology

[0002] Currently, in the air conditioning industry, manual flame brazing is widely used for welding evaporator components in confined spaces with dense piping. This method involves manually heating the weld joint with a handheld welding torch. At the start of welding, the flame is adjusted to a neutral flame, and the welding rod is placed on the opposite side of the torch at the weld joint. The torch heats the copper tubing at the weld joint to a dark red color. The flame does not directly heat the solder; heat is transferred through the copper tubing to melt it. This process ensures the copper tubing does not melt while the solder melts and fills the weld joint. During welding, the torch must be oscillated to prevent localized overheating and overburning.

[0003] The applicant has discovered that the manual flame welding method for evaporator components has at least the following technical problems:

[0004] 1. Manual flame brazing is subject to fluctuations, and the quality of the weld joints depends heavily on the skill level of the operator.

[0005] 2. This job involves repetitive tasks, requires significant manual labor, and has a more demanding working environment than other positions.

[0006] 3. There are many types of evaporator products, and the diversity of product structure and size leads to changes in the arrangement of solder joints and the amount of solder filling, which requires high welding skills from employees. Utility Model Content

[0007] The purpose of this invention is to provide a welding device to solve the technical problems of high labor intensity, unstable quality, and low production efficiency in the existing technology of manual flame welding of evaporators.

[0008] To achieve the above objectives, the present invention provides the following technical solution:

[0009] This utility model provides a welding device, comprising at least one set of contour welding modules and a positioning fixture, wherein the product to be welded is placed on the positioning fixture; all the contour welding modules are arranged around the positioning fixture to correspond to different welding areas of the product to be welded; each contour welding module includes a support fixture frame, an adjustment component, and a contour welding arc; wherein:

[0010] The adjustment component is mounted on the support fixture;

[0011] The contoured fire bar is connected to the adjustment component and can move under the action of the adjustment component.

[0012] The welding device provided by this utility model includes positioning fixtures and several sets of contour welding modules, which can realize the overall welding of evaporator components of a specific model, greatly shorten the welding time of the specific model of evaporator, improve product production efficiency, improve the consistency of welding quality by using the overall welding technology of evaporator, and greatly reduce the workload of employees.

[0013] As a further improvement of this utility model, the conformal firebox includes a fire shell, a connecting port, a fire rod, a fire nozzle, an air inlet pipe, and a plug; wherein:

[0014] The fire shell has a hollow structure and an internal cavity;

[0015] The number of connection ports is multiple, and they are arranged side by side at intervals along one side of the fire shell;

[0016] The fire rod is detachably installed on some or all of the connection ports;

[0017] The nozzle is detachably mounted on the fire rod;

[0018] The plug is detachably installed on the connection port where the firewood is not installed.

[0019] As a further improvement of this utility model, all of the fire sticks may be the same or different in length.

[0020] As a further improvement to this utility model, all the described nozzles may have the same or different specifications and models.

[0021] The design of this utility model involves adjusting the length and specifications of the conformal burner based on the location of the evaporator weld points to ensure that all conformal burners are at the same distance from the weld points. The burner arrangement is designed to mimic the location of the weld points on the evaporator components, ensuring welding quality and enabling efficient and stable implementation of mass welding of specific evaporator models, while reducing the labor and material costs of the welding process.

[0022] As a further improvement of this utility model, the adjustment component includes an X-axis feed mechanism and a Y-axis feed mechanism; wherein:

[0023] The X-axis feed mechanism is mounted on the support fixture.

[0024] The Y-axis feed mechanism is mounted on the X-axis feed mechanism;

[0025] The contouring fire bar is mounted on the Y-axis feed mechanism via a fire bar support rod.

[0026] As a further improvement of this utility model, the X-axis feed mechanism and the Y-axis feed mechanism have the same structure, wherein the X-axis feed mechanism includes a bidirectional telescopic cylinder.

[0027] As a further improvement of this utility model, the X-axis feed mechanism and the Y-axis feed mechanism have the same structure. The X-axis feed mechanism includes a fixed base, a hand crank, a lead screw nut, a guide rail, a slider, and a top seat. The lead screw nut is rotatably mounted on the fixed base. The hand crank is connected to the lead screw nut. The top seat is located on the top of the fixed base and is connected to the lead screw nut through the slider. The guide rail is disposed between the fixed base and the top seat.

[0028] As a further improvement of this utility model, the positioning fixture includes a base, a support plate, a positioning groove, a pressure plate assembly, and a bearing seat; wherein:

[0029] The support plate is mounted on the base and is used to support and limit one side of the part to be welded.

[0030] The positioning groove is located on the side of the support plate and is used to support and limit the bottom of the part to be welded.

[0031] The support seat is disposed beside the positioning groove;

[0032] The pressure plate assembly is located beside the bearing seat and can move closer to or further away from the support plate to support and limit the other side of the part to be welded.

[0033] As a further improvement of this utility model, the pressure plate assembly includes a support base, a connecting rod, a manual operating lever, a U-shaped guide plate, a pressure plate, and a limiting pin; wherein:

[0034] The manual operating lever is rotatably connected to the top of the support base;

[0035] One end of the U-shaped guide plate is rotatably connected to the manual operating lever, and the other end is rotatably connected to the connecting rod.

[0036] The pressure plate is disposed at the end of the connecting rod;

[0037] The limiting pin is installed on the manual operating lever.

[0038] As a further improvement of this utility model, it also includes an intelligent brazing flow control unit, which includes a control cabinet and several sets of air supply branches; wherein, the number of sets of air supply branches is the same as the number of contour welding modules, and the control cabinet is connected to all sets of air supply branches. Attached Figure Description

[0039] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0040] Figure 1 This is a three-dimensional structural schematic diagram (I) of the welding device of this utility model;

[0041] Figure 2 This is a three-dimensional structural schematic diagram (II) of the welding device of this utility model;

[0042] Figure 3 This is a three-dimensional structural schematic diagram (III) of the welding device of this utility model;

[0043] Figure 4 This is a three-dimensional structural diagram of a set of contour welding modules and positioning fixtures in the welding device of this utility model;

[0044] Figure 5 This is a schematic diagram of the positioning component in the contour welding module of the welding device of this utility model;

[0045] Figure 6 This is a schematic diagram of the internal structure of the adjustment component in the contour welding module of the welding device of this utility model;

[0046] Figure 7 This is a three-dimensional structural diagram (a) of the positioning fixture in the welding device of this utility model;

[0047] Figure 8 This is a three-dimensional structural diagram (II) of the positioning fixture in the welding device of this utility model;

[0048] Figure 9 This is a three-dimensional structural diagram (III) of the positioning fixture in the welding device of this utility model;

[0049] Figure 10 This is a three-dimensional structural diagram (I) of the welding device of this utility model when the evaporator is placed in the positioning fixture;

[0050] Figure 11 This is a three-dimensional structural diagram (II) of the welding device of this utility model when the evaporator is placed in the positioning fixture.

[0051] Figure 12 This is a schematic diagram of the intelligent brazing flow control unit in the welding device of this utility model.

[0052] In the diagram: 1. Support fixture; 2. First X-axis feed mechanism; 3. First Y-axis feed mechanism; 4. First burner support rod; 5. First air inlet pipe; 6. First burner casing; 7. First burner nozzle; 8. Positioning fixture; 81. Base; 82. Support plate; 83. Bearing seat; 84. Support seat; 85. Connecting rod; 86. Manual operating lever; 87. U-shaped guide plate; 88. Pressure plate; 89. Limiting pin; 810. Positioning groove; 9. Evaporator component; 10. Second burner nozzle; 11. Second air inlet pipe; 12. Second... 13. Fire shell; 14. Second fire row support rod; 15. Second X-axis feed mechanism; 16. Hand crank wheel; 17. Fixed seat; 18. Top seat; 19. Screw nut; 10. Slider; 11. Guide rail; 12. Second Y-axis feed mechanism; 13. Guardrail; 14. Second fire rod; 15. Intelligent brazing flow control unit; 16. Control cabinet; 17. Oxygen supply branch; 18. Gas supply branch; 18. Nitrogen inlet main pipe; 18. Gas inlet main pipe; 18. Oxygen inlet main pipe. Detailed Implementation

[0053] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0054] like Figures 1-12 As shown, this utility model provides a welding device, including at least one set of contour welding modules and a positioning fixture 8. The product to be welded is placed on the positioning fixture 8. All contour welding modules are arranged around the positioning fixture 8 to correspond to different welding areas of the product to be welded. For example, when there are two welding areas for the product to be welded, two sets of contour welding modules can be set to weld the two welding areas simultaneously, which not only improves efficiency and shortens welding time, but also enables automatic welding using the welding device, eliminating the need for manual hand-held welding guns and reducing labor intensity. For ease of explanation, the following description uses an evaporator component 9 as an example of the product to be welded. All products to be welded below are evaporator components 9.

[0055] In this embodiment, each contour welding module includes a support fixture 1, an adjustment assembly, and a contour welding arcade; wherein:

[0056] The support fixture 1 serves as a load-bearing mechanism, used to support other components of the contour welding module;

[0057] The adjustment component is installed on the support fixture 1 and is used to drive the contour fire bar to move in multiple degrees of freedom;

[0058] The contoured burner is connected to the adjustment component and can move under the action of the adjustment component.

[0059] Considering that the solder joints on the evaporator component 9 are on the same horizontal plane, the adjustment component only needs to drive the contour burner to adjust in two degrees of freedom, without needing to adjust in a third degree of freedom.

[0060] The welding device provided by this utility model includes a positioning fixture 8 and several sets of contour welding modules, which can realize the overall welding of evaporator components 9 of a specific model. It can greatly shorten the welding time of the specific model of evaporator, improve product production efficiency, improve the consistency of welding quality by using the overall welding technology of evaporator, and greatly reduce the workload of employees.

[0061] Furthermore, the contoured firebox includes a fire casing, a connector, a fire rod, a nozzle, an air intake pipe, and a plug; among which:

[0062] The fire casing has a hollow structure with an internal cavity, which can mix the oxygen and fuel gas delivered in the intake pipe and then deliver them out in multiple ways.

[0063] There are multiple connection ports, arranged side by side at intervals along one side of the fire shell; the connection ports are used for the delivery of the oxygen and fuel mixture; the number of connection ports and the spacing between them are set according to the distance between adjacent weld points on the evaporator component 9; of course, in order to meet the needs of different evaporator components 9, multiple fire shells can be set, and the spacing between the connection ports on each fire shell can be different, and the number of connection ports can also be different, and the corresponding fire shell is selected according to the actual parameters of the evaporator component 9.

[0064] The fire rod is detachably installed on some or all of the connection ports; specifically, the detachable connection method can be a threaded connection, for example, an internal thread is set on the connection port, and an external thread is set on the outside of the fire rod. The threaded connection realizes the detachable connection between the fire rod and the connection port; when the points to be welded are not set continuously but are spaced apart by two connection ports, some connection ports can be sealed with plugs, and the fire rod can be connected to the connection ports at intervals.

[0065] The nozzle is detachably mounted on the fire rod; the detachable connection here can be a threaded connection.

[0066] The plug is detachably installed on the connection port where no burner nozzle is installed. The plug can also be detachably connected to the connection port via a threaded connection. The purpose of the plug is to seal the connection port where no burner nozzle is connected.

[0067] The welding device of this invention consists of multiple burners working simultaneously, with each burner forming a stable temperature field range. This reduces welding time and avoids the influence of ambient temperature on the welding process when using a traditional single welding torch. It has significant advantages for mass production orders of a specific model of evaporator.

[0068] To achieve the contouring effect, in this embodiment, all the firewood stalks may be the same or different lengths, such as... Figure 2 As shown, the middle burner rod of the right-side profiled burner is short, while the burner rods at both ends are long, thus ensuring that the burner nozzle and the welding point of the evaporator component 9 are in the same position; while the center burner rod of the left-side profiled burner rod is long, while the burner rods at both ends are short, which also ensures that the welding point of the burner nozzle and the evaporator component 9 are in the same position.

[0069] As a further improvement to this utility model, all burner specifications may be the same or different. Since the arrangement of weld points on the evaporator component 9 varies depending on the evaporator model, it is necessary to ensure that each burner maintains a specific welding distance from the weld point during welding using a burner array. A long welding distance results in slow heat absorption at the weld point, affecting welding efficiency; a short welding distance makes it easy for the flame core to penetrate the base material piping. Therefore, the flame rod of each burner has a different length. Since all weld points of each evaporator are on the same horizontal plane, all burners are arranged in a horizontal row. Multiple branches on the burner casing are evenly distributed by the main air intake pipe. During welding, matching conformal burners are installed according to the material supplied with the evaporator component 9.

[0070] Specifically, the burners come in various diameters and types, including six- or eight-point burners. The appropriate burner is selected based on the weld joint specifications and location. According to the combustion characteristics of the flame, the heat is highest at the flame core. To ensure uniform heating of the weld joints, the distance between the weld joints and the evaporator component 9 can be achieved by matching the shape of the burner rods and nozzles of different lengths and shapes to the evaporator component 9, thus ensuring a uniform supply of welding heat for different weld joints.

[0071] It should be noted that the conformal design in this utility model refers to setting the flame nozzles along the weld point at the same distance from the weld point, based on the shape characteristics of the evaporator component 9. When the evaporator component 9 bends outward at a certain point, the flame nozzle at this point needs to have a longer flame rod than the flame nozzles at other locations. This ensures that the flame nozzles at the bend are at the same distance from the weld point as the flame nozzles at the non-bend points, thus avoiding the problem of incomplete welding or weld penetration due to different distances.

[0072] The design of this utility model involves adjusting the length and specifications of the conformal burner based on the position of the evaporator weld points to ensure that all conformal burners are at the same distance from the weld points. The burner arrangement is designed to mimic the position of the weld points on the evaporator component 9, ensuring welding quality and enabling efficient and stable implementation of mass welding of specific evaporator models, while reducing the labor and material costs of the welding process.

[0073] As an optional embodiment of this utility model, the adjustment component includes an X-axis feed mechanism and a Y-axis feed mechanism; wherein:

[0074] The X-axis feed mechanism is mounted on the support fixture 1;

[0075] The Y-axis feed mechanism is mounted on the X-axis feed mechanism;

[0076] The contouring fire bar is mounted on the Y-axis feed mechanism via a fire bar support rod.

[0077] To simplify the structure, the X-axis feed mechanism and the Y-axis feed mechanism are identical, and the X-axis feed mechanism includes a bidirectional telescopic cylinder. The X-axis and Y-axis feed mechanisms enable contour-following flame bar movement welding, meeting the requirements for flexible welding of the evaporator. This embodiment is not shown in the accompanying drawings.

[0078] This bidirectional telescopic cylinder can be hydraulic, pneumatic, or electric. When it's an electric telescopic cylinder, the telescopic cylinder of the Y-axis feed mechanism is mounted on the telescopic rod of the X-axis feed mechanism, allowing it to move back and forth under the influence of the telescopic rod. To improve stability, guide rods or other structures can be added to ensure smooth reciprocating motion. The contour-following firebox is mounted on the telescopic rod of the Y-axis feed mechanism's telescopic cylinder, and guide rods can also be provided for stable guidance.

[0079] As another optional embodiment of this utility model, such as Figure 5 and Figure 6 As shown, it should be noted that Figure 5 For illustrative purposes only, this diagram shows the installation relationship between the X-axis and Y-axis feed mechanisms. The lead screw, nut, and slide rail of the feed mechanisms are not shown; instead, they are obscured by a cover plate. In actual use, this cover plate is not present. The actual X-axis and Y-axis feed mechanisms are shown in [the diagram / illustration]. Figure 6 The information is given in the middle. Figure 6 The structure refers to the structural components used in actual applications; such as... Figure 6As shown, the X-axis feed mechanism and the Y-axis feed mechanism have the same structure. The X-axis feed mechanism includes a fixed base 142, a handwheel 141, a lead screw nut 144, a guide rail 146, a slider 145, and a top seat 143. The fixed base 142 has a π-shaped structure, with its bottom sides bolted to the support fixture 1. The lead screw nut 144 is rotatably disposed within the cavity of the fixed base 142. The handwheel 141 is connected to one end of the lead screw in the lead screw nut 144, enabling the lead screw to rotate. The top seat 143 is located on top of the fixed base 142 and connected to the nut of the lead screw nut via the slider 145. The guide rail 146 is disposed between the fixed base 142 and the top seat 143. Specifically, the guide rail 146 is disposed on the top of both sides of the fixed base 142, and the top seat 143 has corresponding guide grooves that match the shape and specifications of the guide rail 146, with the guide grooves slidably disposed on the guide rail 146.

[0080] Since the Y-axis feed mechanism has the same structure as the X-axis feed mechanism, it will not be described in detail. The only difference is that the fixed seat in the Y-axis feed mechanism is connected to the top seat in the X-axis feed mechanism, and one end of the fire support rod is fixedly connected to the top seat of the Y-axis feed mechanism.

[0081] As a further improvement to this utility model, such as Figures 7-11 As shown, the positioning fixture 8 includes a base 81, a support plate 82, a positioning groove 810, a pressure plate 88 assembly, and a bearing seat 83; wherein:

[0082] The base 81 serves as a support structure for the tooling;

[0083] The support plate 82 is L-shaped and is installed on the base 81 to support and limit one side of the evaporator component 9 using the vertical side plate. Specifically, it serves as the main plate contact surface in the evaporator component 9, thereby achieving one degree of freedom restriction.

[0084] There are multiple positioning grooves 810, each of which is waist-shaped and has a U-shaped bottom. The U-shaped positioning groove 810 is used to support and limit the U-shaped bottom of the evaporator and is positioned to fit the U-shaped bottom. It is located on the side of the support plate 82 and is used to support and limit the U-shaped bottom of the evaporator component 9.

[0085] The support seat 83 is located next to the positioning groove 810 and is used to support the fins of the evaporator component 9. It contacts the fins to perform coarse positioning of the evaporator.

[0086] The pressure plate 88 assembly is located beside the support base 83 and can be close to or far away from the support plate 82 to support and limit the other side of the evaporator component 9.

[0087] Specifically, the pressure plate 88 assembly includes a support base 84, a connecting rod 85, a manual operating lever 86, a U-shaped guide plate 87, a pressure plate 88, and a limiting pin 89; wherein:

[0088] The support base 84 is fixed to the base 81 of the positioning fixture 8;

[0089] The manual operating lever 86 is rotatably connected to the top of the support base 84; it should be noted that the support base 84 includes a base and a U-shaped fixing part, the U-shaped fixing part is installed on the top of the base; the manual operating lever 86 is installed in the inner cavity of the U-shaped fixing part through a rotating shaft, and can be rotated vertically;

[0090] One end of the U-shaped guide plate 87 is rotatably connected to the manual operating lever 86, and the other end is rotatably connected to the connecting rod 85. When the manual operating lever 86 rotates around the axis, the U-shaped guide plate 87 will move left and right accordingly, thereby driving the connecting rod 85 connected to it to move left and right.

[0091] The pressure plate 88 is located at the end of the connecting rod 85; when the connecting rod 85 moves left and right, it can approach the support plate 82 to push and limit the evaporator component 9, or move away from the evaporator component 9 to release it.

[0092] The limiting pin 89 is installed on the manual operating lever 86. The limiting pin 89 is used to prevent the manual operating lever 86 from falling downward under the action of gravity and coming into contact with the evaporator component 9, which would cause damage.

[0093] By operating the manual lever 86, the hinged U-shaped guide plate 87 is moved back and forth towards the support plate 82, causing the connecting rod 85 to move back and forth. The connecting rod 85 passes through the guide groove, causing the threaded cylindrical pressure plate 88 on it to press and release back and forth. A limit pin 89 is threadedly connected to the manual lever 86 to limit its height.

[0094] As a further improvement to this utility model, such as Figure 12 As shown, it also includes an intelligent brazing flow control unit 18, which includes a control cabinet 181 and several sets of gas supply branches; it also includes an oxygen inlet main pipe 186, a gas inlet main pipe 185, and a nitrogen inlet main pipe 184; wherein, the number of gas supply branches is the same as the number of contour welding modules, and the control cabinet 181 is connected to all the gas supply branches.

[0095] It should be noted that the control cabinet 181 is equipped with corresponding control components and control circuit boards, which are used to regulate and control the start and stop of airflow and airflow speed in each air supply branch.

[0096] Furthermore, the following explanation will take three sets of contour welding modules as an example.

[0097] When there are three sets of contour welding modules, there are also three sets of gas supply branches. Each set of gas supply branches includes an oxygen supply branch 182, a gas supply branch 183, and a nitrogen supply branch. Among them, the oxygen supply branch 182 and the gas supply branch 183 are connected to the burner shell and are used to mix and output oxygen and gas in the burner shell. The nitrogen supply branch (not shown in the figure) is connected to the oxygen supply branch 182. During normal welding, there is no nitrogen supply in the nitrogen supply branch. When welding needs to be stopped and the flame needs to be extinguished, the nitrogen supply branch supplies nitrogen to the oxygen supply branch and then finally enters the burner shell to achieve the flame extinguishing process.

[0098] The oxygen intake main pipe 186 is split into three; the gas intake main pipe 185 is also split into three; the nitrogen intake main pipe 184 is split into three; and on each gas supply branch is equipped with a switch valve, regulating valve, flow meter and other instruments to achieve the corresponding control action.

[0099] Example 1:

[0100] In this embodiment, as Figures 1-3 As shown, the welding device includes two sets of contour welding modules and a positioning fixture 8; one set of contour welding modules includes a first X-axis feed mechanism 2, a first Y-axis feed mechanism 3, a first burner support rod 4, a first air inlet pipe 5, a first burner shell 6, a first burner nozzle 7, and a first burner rod; the other set of contour welding modules includes a second X-axis feed mechanism 14, a second Y-axis feed mechanism 15, a second burner support rod 13, a second air inlet pipe 11, a second burner shell 12, a second burner nozzle 10, and a second burner rod 17; the positioning fixture 8 includes a base 81. The system includes a support plate 82, a bearing seat 83, a support seat 84, a connecting rod 85, a manual operating lever 86, a U-shaped guide plate 87, a pressure plate 88, a limit pin 89, and a positioning groove 810; it also includes a protective railing 16 set on the periphery, and an intelligent brazing flow control unit 18 for supplying gas and oxygen. The intelligent brazing flow control unit 18 includes a control cabinet 181, an oxygen supply branch 182, a gas supply branch 183, a nitrogen inlet main pipe 184, a gas inlet main pipe 185, an oxygen inlet main pipe 186, and a nitrogen supply branch, etc.

[0101] The intelligent brazing flow control unit 18 controls the overall welding flame gas flow rate. It consists of three independent gas distribution modules, each connected to a welding device. The oxygen inlet main 186, gas inlet main 185, and nitrogen inlet main 184 are connected to the three branch pipes. Each branch pipe mainly consists of a pressure regulating valve, a gas flow switch, a gas flow controller, and a dry flashback prevention valve, forming a one-to-three structure for the intelligent brazing flow control unit 18. The gas pipe modules differ slightly from each other. Gas and oxygen are supplied according to the gas flow parameters specified in the process documentation, and are delivered to the gas and oxygen inlet pipes via gas and oxygen hoses.

[0102] Since the two sets of contour welding modules have the same structure, the following explanation will take the second set of contour welding modules as an example.

[0103] The second burner casing 12 is a hollow structure. After the gas enters through the second gas / oxygen intake pipe 11, it is evenly discharged through multiple branch channels. Each branch outlet hole has an internal thread. According to the welding point arrangement on the evaporator component 9, they are connected by screwing the external thread of the second burner rod 17 into the internal thread connection port, which facilitates the installation of different burners. The second burner casing 12 is welded to the burner support rod as a whole. The burner support rod is connected to the second X-axis feed mechanism 14 and the second Y-axis feed mechanism 15 by screws and nuts, fixing the burner support rod to the feed mechanism. The position of the contour burner can be controlled by a hand crank. The support fixture 1 is used to fix the height of the contour burner and also serves a stabilizing function. The weld points of evaporator component 9 are all in the same plane. The burners are arranged in accordance with the shape of the evaporator weld points. It should be noted that the burner arrangement here includes aligning the burners with each weld point, and the welding distance of the burners must be guaranteed. For example, each burner should be 50mm away from the weld point. If the distance of the bent part of evaporator component 9 needs to be guaranteed, the length of the burner rod behind the burner should be longer to ensure that the welding distance is the same.

[0104] During the welding process, the positions of the two sets of contour burners are controlled by the adjustment components on the left and right sides. According to the welding arrangement of different evaporator components 9, different contour burners are replaced to achieve one-to-one correspondence. Gas and oxygen are evenly distributed to each branch burner through the air inlet pipe to achieve the overall welding of different evaporator components 9.

[0105] During operation, the overall welding device first determines the code of the batch welding evaporator component 9, and then matches the corresponding burner nozzle and burner rod in the contour burner according to the shape characteristics of the evaporator, and replaces and installs them. After replacing the burner rod and burner nozzle in the contour burner, the evaporator component 9 to be welded is placed on the positioning fixture 8. The evaporator component 9 is positioned and clamped by the support plate 82, bearing seat 83, positioning groove 810 and pressure plate 88 on the positioning fixture 8.

[0106] Once the flames on the burners have stabilized, the left and right side adjustment components are controlled to move the two contour burners to specific welding positions for welding. After welding is completed, the two contour burners are quickly retracted using the adjustment components. During the welding process, the adjustment components ensure that each burner nozzle on the contour burner corresponds one-to-one with each of the nine welding points on the same model of evaporator component, and that the welding distance and time are kept consistent.

[0107] There are differences among the weld points on the evaporator component 9. For example, the pipe wall is thicker than that of the elbow weld point, and the heat requirement is higher when the solder melts. The overall welding method of the conformal burner keeps the welding time of each weld point consistent. Therefore, different types of burners are used for different types of weld points. The flame heat is controlled by the burner structure to complete the synchronous welding of different types of weld points.

[0108] During the welding process, attention must be paid to process parameters such as the moving speed of the X-axis and Y-axis feed mechanisms of the contour flame bar, the welding gas flow rate, and the welding time. The number, arrangement, and spacing of weld points for each evaporator component 9 have a significant impact on the welding parameters. It is necessary to design the flame bar separately for different evaporator models. Therefore, the integrated welding device has obvious advantages in the mass production of a single evaporator model. When switching products, it is necessary to redesign the corresponding integrated flame welding device according to the weld point position of the product.

[0109] First, it should be noted that "inward" refers to the direction towards the center of the storage space, while "outward" refers to the direction away from the center of the storage space.

[0110] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the appendix. Figure 1 The orientations or positional relationships shown are for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0111] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0112] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0113] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0114] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0115] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A welding apparatus, characterized in that, It includes at least one set of contour welding modules and a positioning fixture, on which the product to be welded is placed; all the contour welding modules are arranged around the positioning fixture to correspond to different welding areas of the product to be welded; each contour welding module includes a support fixture frame, an adjustment component, and a contour welding arc; wherein: The adjustment component is mounted on the support fixture; The contoured fire bar is connected to the adjustment component and can move under the action of the adjustment component.

2. The welding apparatus according to claim 1, characterized in that, The conformal firebox includes a fire casing, a connecting port, a fire rod, a nozzle, an air intake pipe, and a plug; wherein: The fire shell has a hollow structure and an internal cavity; The number of connection ports is multiple, and they are arranged side by side at intervals along one side of the fire shell; The fire rod is detachably installed on some or all of the connection ports; The nozzle is detachably mounted on the fire rod; The plug is detachably installed on the connection port where the firewood is not installed.

3. The welding apparatus according to claim 2, characterized in that, All of the firewood may be the same or different in length.

4. The welding apparatus according to claim 2, characterized in that, All of the aforementioned nozzle specifications may be the same or different.

5. The welding apparatus according to any one of claims 1-4, characterized in that, The adjustment assembly includes an X-axis feed mechanism and a Y-axis feed mechanism; wherein: The X-axis feed mechanism is mounted on the support fixture. The Y-axis feed mechanism is mounted on the X-axis feed mechanism; The contouring fire bar is mounted on the Y-axis feed mechanism via a fire bar support rod.

6. The welding apparatus according to claim 5, characterized in that, The X-axis feed mechanism and the Y-axis feed mechanism have the same structure, wherein the X-axis feed mechanism includes a bidirectional telescopic cylinder.

7. The welding apparatus according to claim 5, characterized in that, The X-axis feed mechanism and the Y-axis feed mechanism have the same structure. The X-axis feed mechanism includes a fixed base, a hand crank, a lead screw nut, a guide rail, a slider, and a top seat. The lead screw nut is rotatably mounted on the fixed base. The hand crank is connected to the lead screw nut. The top seat is located on top of the fixed base and is connected to the lead screw nut through the slider. The guide rail is disposed between the fixed base and the top seat.

8. The welding apparatus according to claim 1, characterized in that, The positioning fixture includes a base, a support plate, a positioning groove, a pressure plate assembly, and a bearing seat; wherein: The support plate is mounted on the base and is used to support and limit one side of the part to be welded. The positioning groove is located on the side of the support plate and is used to support and limit the bottom of the part to be welded. The support seat is disposed beside the positioning groove; The pressure plate assembly is located beside the bearing seat and can move closer to or further away from the support plate to support and limit the other side of the part to be welded.

9. The welding apparatus according to claim 8, characterized in that, The pressure plate assembly includes a support base, a connecting rod, a manual operating lever, a U-shaped guide plate, a pressure plate, and a limiting pin; wherein: The manual operating lever is rotatably connected to the top of the support base; One end of the U-shaped guide plate is rotatably connected to the manual operating lever, and the other end is rotatably connected to the connecting rod. The pressure plate is disposed at the end of the connecting rod; The limiting pin is installed on the manual operating lever.

10. The welding apparatus according to claim 1, characterized in that, It also includes an intelligent brazing flow control unit, which includes a control cabinet and several sets of air supply branches; wherein the number of sets of air supply branches is the same as the number of the contour welding modules, and the control cabinet is connected to all sets of air supply branches.

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