Aluminum veneer welding device

Abstract

The invention relates to an aluminum veneer welding device, which belongs to the technical field of welding, and comprises a main machine, a resistance welding gun, a welding pool, an air pipe and a pressure reducing valve, the welding pool is connected with an electrode of the main machine, and the welding pool is used for placing an aluminum substrate; the gas pipe communicates with the bottom of the welding pool; the pressure reducing valve is connected to the end, away from the welding pool, of the gas pipe and connected with a protective gas source through an electromagnetic valve. Protective gas enters the welding pool through the pressure reducing valve and the gas pipe so as to discharge oxygen in the welding pool; the density of the protective gas is greater than that of the oxygen; the technical problem of welding defects caused by high-speed blowing of protective gas in the prior art can be solved.

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 kind of building decoration material with aluminum alloy plate as the base material, which is processed by chromization and then fluorocarbon spraying technology. In order to balance the production cost and installation cost during manufacturing, large-area whole plates will be used in specific installation areas. In order to improve the wind resistance and anti-distortion ability of large-area aluminum veneer, it is necessary to reinforce it by welding reinforcement ribs on the back of the substrate. The aluminum veneer has high requirements on the flatness of the substrate surface. Therefore, the welding of the reinforcement ribs must take into account both the welding strength and the smaller 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, 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 sleeve picking element and a rear centering sleeve picking element, the rear centering sleeve 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 prior art has the following defects:

[0005] When using argon arc welding, the high-speed blowing of the shielding gas flow will cause turbulence, allowing 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 invention provides an aluminum single plate welding device, which can solve the technical problem of welding defects caused by high-speed blowing of protective gas in the prior art.

[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 machine and a resistance welding gun, and also comprising a welding pool, an air pipe and a pressure reducing valve, wherein the welding pool is connected to an electrode of the main machine, and the welding pool 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 through an electromagnetic 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 used to slowly fill the welding pool from bottom to top through the pressure reducing valve, so that the shielding gas is prevented from forming a high-speed airflow, thereby 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, a plurality of receiving plates are insulated and connected in the welding pool, the receiving plate is connected to the electrode of the main machine, and the receiving plate is used to place the aluminum substrate; the wiring harness is connected between the plurality of receiving plates, and the wiring harness electrically connects the plurality of receiving plates to each other.

[0013] Through 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, and the plurality of through holes 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 protective gas in the welding pool.

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

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

[0018] In the present invention, the insulating sheet comprises a first insulating sheet and a second insulating sheet, a varistor is connected between the first insulating sheet and the second insulating sheet, and the varistor is communicatively connected 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 welding device further comprises a cooling component which is arranged around the outside of the welding pool and which makes the temperature of the shielding gas near the side wall of the welding pool lower than the temperature of the shielding gas 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, which is connected to the side 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 drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. 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 creative work.

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

[0030] Figure 2 An axonometric diagram of an aluminum single plate welding device provided by an embodiment of the present invention after an aluminum substrate and reinforcing ribs are placed therein;

[0031] Figure 3 A front view of an aluminum single plate welding device provided by an embodiment of the present invention after an aluminum substrate and reinforcing ribs are placed therein;

[0032] Figure 4 for Figure 3 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 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] Fig. 9 An exploded view of a welding pool provided in 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 transmitter; 203-dust suction tube; 204-positioning needle; 205-resistance welding head; 301-aluminum substrate; 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 the present application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present 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 should not be understood as a limitation on the present application.

[0041] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0042] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be welding, bolt connection, or riveting; it can be fixed connection, detachable connection, or integral connection; it can be mechanical connection or electrical connection; it can be directly connected or indirectly connected through an intermediate medium, or it can be internal communication between two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to 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, and also includes 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 Fig. 9 As shown, the air pipe 121 is in an array-distributed multi-outlet shape, 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 of the 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 the solenoid valve, and the protective gas source adopts 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 put in. Under the action of the current, because only the tip of the lower end of the welding pin 303 contacts the aluminum substrate 301, the contact point resistance 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 temperature because of the largest resistance. 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 the 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, so that the shielding gas is prevented from forming a high-speed airflow, thereby reducing the occurrence of welding defects.

[0049] As a preferred implementation method, Figure 4 and Fig. 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 in the welding pool 1. The receiving plate is connected to the electrode of the main machine 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 multiple receiving plates to each other. The exemplary wiring harness is woven with soft copper wire and has a certain degree of deformability.

[0050] Through 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 1 from being conductive, thereby improving the safety of welding.

[0051] As a preferred implementation method, Figure 1 and Fig. 9 As shown, the welding device further comprises a plurality of through holes 1101, and the plurality of through holes 1101 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 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 protective gas in the welding pool 1.

[0054] As a preferred implementation method, Figure 4 and Fig. 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 column 130 and the receiving plate.

[0055] like Figure 7As shown, the adjustment 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 side 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 being connected to the limiting ring 133, the threaded column 132 is rotatably connected to the bottom of the welding pool 1.

[0056] When in use, the threaded column 132 is rotated to drive the threaded sleeve 131 to drive the receiving plate to approach or move away from the bottom of the welding pool 1, and the receiving plate can be leveled through the three adjustment 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 adjusting column 130.

[0058] As a preferred 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 with the solenoid valve.

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

[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 usage of the protective gas.

[0061] As a preferred 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 temperature of the protective gas near the side wall of the welding pool 1 lower than the temperature of the protective gas near the central 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 the heat dissipation fan cools the hot surface of the semiconductor refrigeration plate and diffuses the hot air to the surroundings. By looking down at the state at this time through thermal imaging technology, a hot-cold-hot three-ring thermal distribution diagram can be seen, in which the central hot circle is formed by the heat generated by welding, and the outer hot circle is formed by the heat dissipated 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 can only be supplemented by the air pipe 121 after the gas is lost, 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 improving 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 preferred 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 transmitter 202 to form a circular light spot directly below the resistance welding head 205, such as Figure 5 As shown, after preliminary positioning by three positioning pins 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 inserted for further welding.

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

[0070] As a preferred 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 is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope of the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. An aluminum 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 an electrode of the host (2), the welding pool (1) being used to place an aluminum substrate (301); An air pipe (121) connected to the bottom of the welding pool (1); A pressure reducing valve (120) connected to an end of the air pipe (121) facing away from the welding pool (1), the pressure reducing valve (120) being 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 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 protective gas near the side wall in the welding pool (1) lower than the temperature of the protective gas near the central area in the welding pool (1).

2. The aluminum single plate welding device according to claim 1, characterized in that: Also includes: A plurality of receiving plates, insulated and connected in the welding pool (1), the receiving plates being connected to electrodes of the main machine (2), and the receiving plates being used to place an aluminum substrate (301); The wiring is connected between the plurality of the receiving plates, and the wiring electrically connects the plurality of the receiving plates to each other.

3. The aluminum single plate welding device according to claim 2, characterized in that: Also includes: A plurality of through holes are evenly spaced and arranged on the surface of the receiving plate.

4. The aluminum single plate welding device according to claim 3, characterized in that: Also includes: 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 is connected between the adjusting column (130) and the receiving plate.

5. The aluminum single plate welding device according to claim 4, characterized in that: 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.

6. The aluminum single plate welding device according to claim 5, characterized in that: Also includes: An oxygen detector (140) is connected to the opening of the welding pool (1).

7. The aluminum single plate welding device according to claim 6, 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).

8. The aluminum single plate welding device according to claim 7, characterized in that: Also includes: A dust suction pipe (203) is connected to the side of the resistance welding gun (201).

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