Aluminum veneer welding device

Abstract

The invention relates to an aluminum single plate welding device, belonging to the field of welding technology. The device comprises: a main machine and a resistance welding gun, and also comprises a welding pool, an air pipe and a pressure reducing valve. The welding pool is connected to an electrode of the main machine and is used to place an aluminum substrate. The air pipe is communicated with the bottom of the welding pool. The pressure reducing valve is connected to one end of the air pipe away from the welding pool and is connected to a protective gas source via a solenoid valve. The protective gas enters the welding pool through the pressure reducing valve and the air pipe, thereby exhausting oxygen in the welding pool. The density of the protective gas is greater than that of oxygen. The device can solve the technical problem in the prior art of welding defects caused by high-speed blowing of the protective gas.

Description

Technical Field

[0001] The invention belongs to the technical field of welding, and in particular relates to an aluminum single plate welding device. Background Art

[0002] Aluminum veneer is a building decoration material that uses aluminum alloy plates as the base material, is chromized, and then processed using fluorocarbon spraying technology. In order to balance production costs and installation costs during manufacturing, large-area whole panels will be used in specific installation areas. In order to improve the wind resistance and anti-torsion capabilities of large-area aluminum veneers, it is necessary to reinforce the back of the substrate by welding reinforcement ribs. Aluminum veneer has high requirements for the flatness of the substrate surface. Therefore, the welding of reinforcement ribs must take into account both welding strength and small welding deformation.

[0003] The existing patent with announcement number CN109604848B discloses a composite welding machine for resistance welding and argon arc shielded welding, including an operating side and a transport side. The operating side is provided with a frame, a resistance welding assembly, a double-edged shear assembly and a argon arc welding assembly, and the transport side is provided with a centering conveying assembly, a crescent shear assembly and a punching assembly; the resistance welding assembly includes a rolling wheel, an electric welding wheel, a lifting device and a heating device; the argon arc welding assembly includes at least one argon arc welding gun, a column and a moving assembly; the centering conveying assembly includes an inlet clamp, an outlet clamp, a front centering picking element and a rear centering picking element, the rear centering picking element includes two groups of centering parts, and the crescent shear assembly and the punching assembly are arranged between the two groups of centering parts.

[0004] The existing technology has the following defects:

[0005] When using argon arc welding, the high-speed blowing of the shielding airflow will cause turbulence and allow air to invade the molten pool. On the other hand, it will also cause the molten pool to cool down quickly, resulting in insufficient crystallization and welding defects. Summary of the Invention

[0006] The present invention provides an aluminum single plate welding device, which can solve the technical problem in the prior art that welding defects are caused by high-speed blowing of protective gas.

[0007] In order to achieve the above object, the present invention is implemented by the following technical solutions:

[0008] The present application provides an aluminum single plate welding device, comprising a main unit and a resistance welding gun, a welding pool, an air pipe, and a pressure reducing valve. The welding pool is connected to an electrode of the main unit and is used to place an aluminum substrate. The air pipe is connected to the bottom of the welding pool. The pressure reducing valve is connected to an end of the air pipe away from the welding pool, and the pressure reducing valve is connected to a protective gas source via a solenoid valve.

[0009] The shielding gas enters the welding pool through the pressure reducing valve and the gas pipe to discharge the oxygen in the welding pool;

[0010] The density of the above-mentioned shielding gas is greater than the density of oxygen.

[0011] Through the above technical solution, the shielding gas is slowly filled into the welding pool from bottom to top through the pressure reducing valve, thereby avoiding the shielding gas from forming a high-speed airflow and reducing the occurrence of welding defects.

[0012] In the present invention, the above-mentioned welding device also includes a receiving plate and a wiring harness. Multiple receiving plates are insulated and connected to the welding pool. The receiving plates are connected to the electrodes of the host and are used to place the aluminum substrate. The wiring harness is connected between the multiple receiving plates and electrically connects the multiple receiving plates to each other.

[0013] With the above technical solution, the receiving plate with insulation connection is electrically connected through the wiring, so as to avoid the main body of the welding pool from being conductive, thereby improving the safety of welding.

[0014] In the present invention, the welding device further comprises a plurality of through holes, which are evenly spaced apart and opened on the surface of the receiving plate.

[0015] Through the above technical solution, a plurality of through holes are opened on the surface of the receiving plate, which can facilitate the discharge of gas under the receiving plate and improve the purity of the shielding gas in the welding pool.

[0016] In the present invention, the welding device further comprises an adjusting column and an insulating sheet. The three adjusting columns are connected between the receiving plate and the welding pool in a herringbone shape. The insulating sheet is connected between the adjusting columns and the receiving plate.

[0017] Through the above technical solution, the flatness of each receiving plate can be independently adjusted by using the adjusting column.

[0018] In the present invention, the insulating sheet includes a first insulating sheet and a second insulating sheet. A varistor is connected between the first insulating sheet and the second insulating sheet. The varistor is in communication connection with the solenoid valve.

[0019] Through the above technical solution, a varistor is used to sense the insertion and removal of the aluminum substrate, thereby rationally controlling the introduction of the protective gas and saving the use of the protective gas.

[0020] In the present invention, the above-mentioned welding device also includes a cooling component, which is arranged around the outside of the welding pool. The cooling component makes the shielding gas temperature near the side wall of the welding pool lower than the shielding gas temperature near the center area of the welding pool.

[0021] Through the above technical solution, a cooling component is used to form a microcirculation of gas exchange in the welding pool, further increasing the concentration of the protective gas in the welding area.

[0022] In the present invention, the welding device further comprises an oxygen detector, which is connected to the opening of the welding pool.

[0023] Through the above technical solution, the oxygen concentration is detected at the opening of the welding pool, thereby preventing oxygen from mixing into the welding pool and affecting the welding quality.

[0024] In the present invention, the resistance welding gun is connected to a laser emitter, and the laser emitter is used to remove the oxide layer on the surface of the aluminum substrate below the resistance welding head of the resistance welding gun.

[0025] Through the above technical solution, laser is used to remove the oxide layer, thereby reducing the thermal deformation caused to the aluminum substrate.

[0026] In the present invention, the welding device further comprises a dust suction pipe connected to a side surface of the resistance welding gun.

[0027] Through the above technical solution, a vacuum tube is used to avoid the presence of aluminum oxide powder on the welding surface, thereby improving the welding strength. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0029] Figure 1 An axonometric diagram of an aluminum veneer welding device provided in an embodiment of the present invention;

[0030] Figure 2 An axonometric view of an aluminum single plate welding device provided by an embodiment of the present invention after inserting an aluminum base plate and reinforcing ribs;

[0031] Figure 3 A front view of an aluminum veneer welding device provided by an embodiment of the present invention after inserting an aluminum substrate and reinforcing ribs;

[0032] Figure 4 for Figure 3 The sectional view at AA in the figure;

[0033] Figure 5 for Figure 4 A local enlarged view of point B in FIG;

[0034] Figure 6 for Figure 3 Cross-sectional view at CC in FIG;

[0035] Figure 7 for Figure 6A local enlarged view of point D in FIG;

[0036] Figure 8 for Figure 3 A local enlarged view of point E in FIG;

[0037] Figure 9 An exploded view of a welding pool according to an embodiment of the present invention.

[0038] Icons: 1-welding pool; 110-first receiving plate; 1101-through hole; 111-second receiving plate; 112-third receiving plate; 113-fourth receiving plate; 114-first row of wires; 115-second row of wires; 116-third row of wires; 117-fourth row of wires; 120-pressure reducing valve; 121-air pipe; 130-adjusting column; 131-threaded sleeve; 132-threaded column; 133-limiting ring; 134-first insulating sheet; 135-varistor; 136-second insulating sheet; 140-oxygen detector; 150-cooling component; 2-host; 201-resistance welding gun; 202-laser emitter; 203-dust suction tube; 204-positioning needle; 205-resistance welding head; 301-aluminum base plate; 302-reinforcement rib; 303-welding nail. DETAILED DESCRIPTION

[0039] The embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0040] In the description of this application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0041] 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 the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. Throughout this application, unless otherwise specified, "plurality" means two or more.

[0042] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "installation," "connection," and "connection" should be understood in a broad sense. For example, they can refer to welding, bolting, or riveting; fixed connection, detachable connection, or integral connection; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; or internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0043] Example:

[0044] Please refer to Figures 1 to 9 , Figures 1 to 9 An embodiment of the present application is shown.

[0045] This embodiment provides an aluminum single plate welding device, such as Figure 1 As shown, it includes a host 2 and a resistance welding gun 201. For example, the host 2 includes the host part of the Kende RSR-4000 capacitor energy storage stud welding machine, the laser generating part of the laser rust remover, and the vacuum cleaner body. The resistance welding gun 201 is modified based on the welding gun part of the Kende RSR-4000 capacitor energy storage stud welding machine. Figure 2 and Figure 3 As shown, it also includes a welding pool 1, an air pipe 121 and a pressure reducing valve 120. The welding pool 1 is connected to the electrode of the host 2 and is used to energize the aluminum substrate 301. The welding pool 1 is used to place the aluminum substrate 301; Figure 3 and Figure 9 As shown, the air pipe 121 is arranged in an array with multiple outlets, and the outlets of the multiple air pipes 121 are evenly distributed at the bottom of the welding pool 1; the pressure reducing valve 120 is connected to the air inlet at one end of the air pipe 121 away from the welding pool 1, and the pressure reducing valve 120 is connected to the protective gas source through a solenoid valve, and the protective gas source is compressed bottled argon gas;

[0046] When in use, the shielding gas enters the welding pool 1 through the pressure reducing valve 120 and the gas pipe 121 to discharge the oxygen in the welding pool 1, and then Figure 4 and Figure 5 As shown, the aluminum substrate 301 reinforcement rib 302 and the welding pin 303 are placed. Under the action of current, since only the tip of the lower end of the welding pin 303 contacts the aluminum substrate 301, the resistance at the contact point is the largest. When the aluminum substrate 301 is charged through the electrode, the top surface of the welding pin 303 also contacts the resistance welding head 205. The contact point has the highest resistance and therefore the highest temperature. The high temperature quickly melts the protrusion on the top surface of the welding pin 303 and the corresponding position of the aluminum substrate 301. Then, under the action of downward pressure, the two are combined and naturally cooled to complete the welding.

[0047] The density of the protective gas is greater than that of oxygen (density is 1.31 g / L at room temperature and pressure), and is preferably argon (density is 1.669 g / L at room temperature and pressure).

[0048] Through the above technical solution, the shielding gas is used to slowly fill the welding pool 1 from bottom to top through the pressure reducing valve 120, thereby avoiding the shielding gas from forming a high-speed airflow and reducing the occurrence of welding defects.

[0049] As a better implementation method, Figure 4 and Figure 9 As shown, the above-mentioned welding device also includes a receiving plate and a wiring harness. The first receiving plate 110, the second receiving plate 111, the third receiving plate 112 and the fourth receiving plate 113 are all insulated and connected to the welding pool 1. The receiving plate is connected to the electrode of the main unit 2, and the receiving plate is used to place the aluminum substrate 301; wherein, a third wiring harness 116 is connected between the first receiving plate 110 and the second receiving plate 111, a fourth wiring harness 117 is connected between the second receiving plate 111 and the third receiving plate 112, a second wiring harness 115 is connected between the third receiving plate 112 and the fourth receiving plate 113, and a first wiring harness 114 is connected between the fourth receiving plate 113 and the first receiving plate 110. The wiring harness electrically connects the multiple receiving plates to each other. The exemplary wiring harness is woven with soft copper wire and has a certain degree of variability.

[0050] Through the above technical solution, the receiving plate with an insulating connection is electrically connected through the wiring, so as to avoid the main body of the welding pool 1 from being conductive, thereby improving the safety of welding.

[0051] As a better implementation method, Figure 1 and Figure 9 As shown, the welding device further includes a plurality of through holes 1101 , which are evenly spaced apart and opened on the surface of the receiving plate.

[0052] The through hole 1101 is punched out with a triangular punch, which takes into account both good discharge performance and good punch strength. At the same time, the diameter of the object allowed to pass through the triangle is smaller than that of a circular hole of the same area.

[0053] Through the above technical solution, a plurality of through holes 1101 are provided on the surface of the receiving plate, which can facilitate the discharge of gas under the receiving plate and improve the purity of the shielding gas in the welding pool 1.

[0054] As a better implementation method, Figure 4 and Figure 9 As shown, the welding device further includes an adjusting column 130 and an insulating sheet. The three adjusting columns 130 are connected between the receiving plate and the welding pool 1 in a herringbone shape; the insulating sheet is connected between the adjusting columns 130 and the receiving plate.

[0055] like Figure 7As shown, the adjusting column 130 includes a threaded sleeve 131, a threaded column 132 and a limiting ring 133. The threaded sleeve 131 is connected to the back of the receiving plate, the threaded column 132 and the threaded sleeve 131 are matched and connected, and the limiting ring 133 is connected to the threaded column 132. After the threaded column 132 is connected to the limiting ring 133, it is rotatably connected to the bottom of the welding pool 1.

[0056] During use, the threaded column 132 is rotated to drive the threaded sleeve 131 to move the receiving plate closer to or away from the bottom of the welding pool 1. The receiving plate can be leveled by the three adjusting columns 130 arranged in a herringbone shape.

[0057] Through the above technical solution, the flatness of each receiving plate can be independently adjusted by using the adjustment column 130.

[0058] As a better implementation method, Figure 6 and Figure 7 As shown, the above-mentioned insulating sheet includes a first insulating sheet 134 and a second insulating sheet 136 , a varistor 135 is connected between the first insulating sheet 134 and the second insulating sheet 136 , and the varistor 135 is communicatively connected to the solenoid valve.

[0059] During use, when the aluminum substrate 301 is placed in the receiving plate, the varistor 135 is pressurized and its resistance changes, thereby energizing the solenoid valve. After the solenoid valve is energized, the protective gas enters the gas pipe 121 through the solenoid valve and the pressure reducing valve 120.

[0060] Through the above technical solution, the varistor 135 is used to sense the insertion and removal of the aluminum substrate 301, thereby rationally controlling the introduction of the protective gas and saving the amount of protective gas used.

[0061] As a better implementation method, Figure 2 As shown, the above-mentioned welding device also includes a cooling component 150, which is arranged around the outside of the welding pool 1. The cooling component 150 makes the shielding gas temperature near the side wall of the welding pool 1 lower than the shielding gas temperature near the center area of the welding pool 1.

[0062] Exemplarily, the cooling component 150 includes a number of semiconductor refrigeration plates. After power is turned on, the cold surface of the semiconductor refrigeration plate cools the side walls of the welding pool 1, and at the same time, the heat dissipation fan cools the hot surface of the semiconductor refrigeration plate and diffuses the hot air to the surroundings. Looking down at the current state through thermal imaging technology, a hot-cold-hot three-ring thermal distribution diagram can be seen. The hot circle in the center is formed by the heat generated by welding, and the outer hot circle is formed by the heat emitted by the semiconductor refrigeration plate. Based on the heat island effect, the gas at the two hot rings rises, and the gas at the cold ring diffuses toward the hot ring to form a microcirculation, that is, an upward airflow is formed around the position of the aluminum substrate 301 to transport the protective gas in the welding pool 1 from bottom to top. However, because the density of the protective gas is greater than the density of oxygen, the gas at the cold ring position around the welding pool 1 is lost and can only be replenished by the air pipe 121, thereby preventing oxygen from mixing into the welding pool 1 during this microcirculation process.

[0063] It should be noted that, because the microcirculation is caused by the temperature difference, and the inlet of the protective gas is reduced in pressure by the pressure reducing valve 120, the interaction between the gases maintains a certain speed, which can avoid the turbulence that introduces oxygen into the air.

[0064] Through the above technical solution, the cooling component 150 is used to form a microcirculation of gas exchange in the welding pool 1, thereby further increasing the concentration of the protective gas in the welding area.

[0065] As a preferred embodiment, the welding device further includes an oxygen detector 140 , which is connected to the opening of the welding pool 1 .

[0066] Through the above technical solution, the oxygen concentration is detected at the opening of the welding pool 1, thereby preventing oxygen from mixing into the welding pool 1 and affecting the welding quality.

[0067] As a better implementation method, Figure 8 As shown, the resistance welding gun 201 is connected to a laser emitter 202 , and the laser emitter 202 is used to remove the oxide layer on the surface of the aluminum substrate 301 below the resistance welding head 205 of the resistance welding gun 201 .

[0068] When in use, the laser generator integrated in the host 2 generates laser light, which is transmitted through the optical fiber and refracted by the laser emitter 202 to form a circular light spot just below the resistance welding head 205, as shown in FIG. Figure 5 As shown, after the initial positioning by three positioning needles 204, the oxide layer on the surface of the aluminum substrate 301 exposed at the opening of the reinforcing rib 302 is removed by short-term high-energy laser shock, and then the welding pin 303 is quickly placed for further welding.

[0069] Through the above technical solution, the oxide layer is removed by laser, thereby reducing the thermal deformation caused to the aluminum substrate 301.

[0070] As a better implementation method, Figure 8 As shown, the welding device further includes a dust suction pipe 203 , which is connected to the side of the resistance welding gun 201 .

[0071] Through the above technical solution, the dust suction tube 203 is used to avoid the presence of aluminum oxide powder on the welding surface, thereby improving the welding strength.

[0072] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope of the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. An aluminum single plate welding device, comprising a main machine (2) and a resistance welding gun (201), characterized in that: Also includes: A welding pool (1) connected to the electrodes of the host (2), the welding pool (1) being used to place the aluminum substrate (301); An air pipe (121) connected to the bottom of the welding pool (1); A pressure reducing valve (120) is connected to an end of the air pipe (121) facing away from the welding pool (1), and the pressure reducing valve (120) is connected to a protective air source via a solenoid valve; The shielding gas enters the welding pool (1) through the pressure reducing valve (120) and the gas pipe (121), thereby exhausting the oxygen in the welding pool (1); The density of the protective gas is greater than the density of oxygen; A cooling component (150) is arranged around the outside of the welding pool (1), and the cooling component (150) makes the temperature of the shielding gas near the side wall of the welding pool (1) lower than the temperature of the shielding gas near the center of the welding pool (1), thereby forming a microcirculation based on the heat island effect; A plurality of receiving plates are insulated and connected to the welding pool (1), the receiving plates are connected to electrodes of the main machine (2), and the receiving plates are used to place an aluminum substrate (301); A wiring harness is connected between the plurality of connecting plates, wherein the wiring harness electrically connects the plurality of connecting plates to each other; A plurality of through holes are evenly spaced apart and formed on the surface of the receiving plate; Adjustment columns (130), three of the adjustment columns (130) are connected between the receiving plate and the welding pool (1) in a herringbone shape; an insulating sheet connected between the adjusting column (130) and the receiving plate; The insulating sheet comprises a first insulating sheet (134) and a second insulating sheet (136); a varistor (135) is connected between the first insulating sheet (134) and the second insulating sheet (136); and the varistor (135) is communicatively connected to the solenoid valve.

2. The aluminum single plate welding device according to claim 1, characterized in that: Also includes: An oxygen detector (140) is connected to the opening of the welding pool (1).

3. The aluminum single plate welding device according to claim 2, characterized in that: The resistance welding gun (201) is connected to a laser emitter (202), and the laser emitter (202) is used to remove an oxide layer on the surface of the aluminum substrate (301) below the resistance welding head (205) of the resistance welding gun (201).

4. The aluminum single plate welding device according to claim 3, characterized in that: Also includes: The dust suction pipe (203) is connected to the side of the resistance welding gun (201).

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