Mechanism and method for coating welding wire with active agent, device for conveying welding wire, welding gun, welding system and welding method

Abstract

The present invention belongs to the field of welding, and specifically relates to a mechanism for coating a welding wire with an activator, comprising a storage component, a tubular component, a connecting pipeline and a pumping device; wherein the storage component is provided with an inlet and an outlet for storing the activator; the two ends of the tubular component are respectively connected to the inlet and the outlet of the storage component through the connecting pipeline, and a through hole suitable for the welding wire to pass through is provided along the radial direction of the tubular component; the pumping device is provided at the inlet and / or the outlet of the storage component, or is provided on the connecting pipeline, and is used to circulate the activator and regulate the pressure at the through hole position of the tubular component. The present invention also relates to a method for coating a welding wire with an activator, a device for conveying welding wire, a welding gun, a welding system and a welding method. The mechanism of the present invention can evenly coat the surface of the welding wire with an activator according to the required amount to obtain a weld with uniform penetration depth, and is simple to operate, environmentally friendly and highly productive.

Description

Technical Field

[0001] The invention belongs to the technical field of welding, and specifically relates to a mechanism for coating an activator on a welding wire, a method for coating an activator on a welding wire, and also relates to a device for conveying welding wire, a welding gun, a welding system and a welding method. Background Art

[0002] The use of activating flux welding is a method developed in the past decade. This method can increase the penetration of the weld, improve the weld formation and welding quality, and improve the welding production efficiency. The main components of the activating flux can be metal oxides, metal fluorides, etc. Current research believes that the mechanism of activating flux to improve the penetration is: first, the activating flux can affect the arc characteristics, which can increase the energy density of the arc and the arc force acting on the molten pool; second, the activating flux affects the surface tension of the molten pool, causing the flow direction of the molten pool to change from "from inside to outside" to "from outside to inside", thereby increasing the welding penetration; some people believe that both mechanisms exist.

[0003] In the early days, activators were mainly used for A-TIG welding of stainless steel, and now they have been successfully used in the welding of carbon steel, high-temperature alloys, titanium alloys and other materials. With the mature application of A-TIG welding, the use of activators has expanded to MIG welding, plasma arc welding and laser welding, which has become a new direction for the development of welding. Currently, activator welding is mainly used in the manufacture of military ships and some pressure vessels, and has not yet been widely promoted.

[0004] Figure 1 A schematic diagram showing the current activator welding method is shown. The main operation is: the main component of the activator is mixed with acetone, alcohol and other volatile organic solvents to form an activator 1-1, and then the activator 1-1 is applied to the welding area of ​​the workpiece 1-2 with a brush, and welding is performed with a welding gun 1-3 after the solvent evaporates. In order to ensure the welding effect, the coating area is generally much larger than the welding area. It can be seen that the current activator welding method has the following disadvantages:

[0005] It requires tedious preparation work before welding;

[0006] Brushing does not produce a uniform, consistent coating of activator, and thus does not produce a weld with uniform penetration depth1-5;

[0007] Generally speaking, the activator 1-1 that can enter the molten pool 1-4 or affect arc welding only accounts for a very small proportion of the coating area, resulting in a large amount of activator 1-1 being wasted. The solvent in the wasted activator 1-1 evaporates into the air and pollutes the environment; in addition, the larger coating area leads to a longer volatilization time, which also affects production efficiency.

[0008] At present, there is an urgent need for a welding device and method using an activating agent that is simple to operate, has uniform weld penetration, is environmentally friendly, and has high production efficiency. Summary of the invention

[0009] The present invention provides a mechanism for coating an activator on a welding wire. When the mechanism is used, the activator circulates between a storage component, a tubular component and a connecting pipeline. The welding wire continuously passes through the through hole of the tubular component so that the activator can be evenly coated on the surface of the welding wire. A weld with uniform penetration can be obtained during subsequent welding, and the operation is simple. Due to the small amount of activator used, the use of the mechanism is environmentally friendly and has high production efficiency. On this basis, the present invention also provides a method for coating an activator on a welding wire, a device for conveying welding wire, a welding gun, a welding system and a welding method.

[0010] A first aspect of the present invention relates to a mechanism for coating a welding wire with an active agent, comprising a storage component, a tubular component, a connecting pipeline and at least one pumping device; wherein,

[0011] A storage component, provided with an inlet and an outlet, for storing an active agent;

[0012] The two ends of the tubular component are respectively connected to the inlet and outlet of the storage component through connecting pipelines, and a through hole suitable for the welding wire to pass through is arranged along the radial direction of the tubular component;

[0013] The pumping device is arranged at the inlet and / or outlet of the storage component, or arranged on the connecting pipeline connected to the inlet and / or outlet of the storage component, for circulating the active agent and regulating the pressure at the through hole position of the tubular component.

[0014] In some embodiments of the first aspect of the present invention, a diameter of the through hole of the tubular component is 0.02-3.3 mm larger than a diameter of a welding wire suitable for passing through the through hole, for example, 0.1-3 mm.

[0015] In some embodiments of the first aspect of the present invention, the diameter of the through hole of the tubular component is 0.5-6.5 mm, for example, 0.6-6.2 mm.

[0016] In some embodiments of the first aspect of the present invention, the mechanism has one or more of the following technical features (A) to (H):

[0017] (A) The inner diameter of the tubular component is 1~10mm;

[0018] (B) the through hole is located in the middle of the length direction of the tubular component;

[0019] (C) the inlet and outlet of the storage unit are each provided with a pumping device;

[0020] (D) the pumping device is a peristaltic pump, preferably selected from a fluid peristaltic pump and a powder peristaltic pump;

[0021] (E) further comprising a vibrating component disposed in the storage component for mixing the paste-like active agent or vibrating the powder-like active agent;

[0022] (F) The active agent is in powder or paste form;

[0023] (G) The pressure parameters of the pumping equipment are adjustable;

[0024] (H) Both ends of the tubular component are away from the points to be welded.

[0025] In the present invention, the paste active agent and the powder active agent are both types of active agents commonly used in the art. Those skilled in the art know and are familiar with the composition, preparation method and application environment of the paste active agent or the powder active agent, and can select the appropriate type of active agent for different welding methods or welding equipment based on professional knowledge and experience.

[0026] In some embodiments of the first aspect of the present invention, the paste-like active agent is formed by mixing the active agent main component and a solvent, wherein the solvent used is preferably a solvent that can enter the molten pool, does not affect the quality of the weld and is splash-proof.

[0027] In some embodiments of the first aspect of the present invention, the radial dimension of the connecting pipeline matches or is the same as the radial dimension of the tubular component, wherein matching means that the radial dimensions of the connecting pipeline and the tubular component are suitable for the two to be connected and installed with each other.

[0028] The second aspect of the present invention relates to a device for conveying welding wire, comprising a guide component and the mechanism described in the first aspect of the present invention; wherein the guide component and the tubular component are arranged in sequence along the length direction of the welding wire from away from the position to be welded to close to the position to be welded, and the guide component is penetrated by a through hole suitable for the welding wire to pass through, and the through hole is coaxial with the through hole of the tubular component, and the guide component is used to control the conveying direction of the welding wire and optionally conduct current to the welding wire.

[0029] In some embodiments of the second aspect of the present invention, the guide component is connected to the tubular component, and preferably the guide component is fixedly connected to the tubular component.

[0030] In some embodiments of the second aspect of the present invention, the guide component is a wire feeding nozzle for controlling the feeding direction of the welding wire;

[0031] Preferably, the tubular component is fixed to the wire feeding nozzle by a clamp.

[0032] In some embodiments of the second aspect of the present invention, the guide component is a conductive nozzle, which is used to control the conveying direction of the welding wire and conduct current to the welding wire.

[0033] In some embodiments of the second aspect of the present invention, a diameter of the through hole of the guide member is substantially the same as a diameter of the through hole of the tubular member.

[0034] In some implementations of the second aspect of the present invention, the spot to be welded refers to a spot on the workpiece to be welded or the plane to be welded that needs to be welded.

[0035] The third aspect of the present invention relates to a welding gun, comprising a gun body, a protective cover and the device described in the second aspect of the present invention; wherein the gun body, the guide component and the tubular component are arranged in sequence along the length direction of the welding wire from far away from the position to be welded to close to the position to be welded, the protective cover is covered on the outside of the guide component, and the gap between the protective cover and the guide component forms a channel suitable for the flow of protective gas, the gun body is connected to one end of the protective cover, and the tubular component is located at the other end of the protective cover; the welding gun is a metal electrode gas shielded welding gun.

[0036] In some embodiments of the third aspect of the present invention, the protective cover is coated on the outside of a portion of the tubular component with the through hole or on the outside of the entire tubular component.

[0037] In some embodiments of the third aspect of the present invention, the protective gas is a mixed gas of one or more selected from carbon dioxide, helium, argon, nitrogen and hydrogen.

[0038] In some embodiments of the third aspect of the present invention, both ends of the tubular component are located outside the protective cover and away from the protective cover.

[0039] In some embodiments of the third aspect of the present invention, an outer wall of the tubular component is provided with an insulating layer.

[0040] In some embodiments of the third aspect of the present invention, the guide component is a conductive nozzle, which is used to control the conveying direction of the welding wire and conduct current to the welding wire.

[0041] In some embodiments of the third aspect of the present invention, the metal-metal gas shielded welding gun is selected from a metal-metal CO2 gas shielded welding gun, a metal-metal inert gas shielded welding gun and a metal-metal active gas shielded welding gun.

[0042] In some embodiments of the third aspect of the present invention, one end of the protective cover is connected to the gun body through an insulating layer.

[0043] In the third aspect of the present invention, the gun body refers to the remaining structures and / or connection relationships in a conventional metal-electrode gas shielded welding gun in the art except for the conductive nozzle, the protective cover and the gas flow channel.

[0044] In some embodiments of the third aspect of the present invention, the gun body is suitable for inputting protective gas into between the protective cover and the guide component.

[0045] In some embodiments of the third aspect of the present invention, the welding wire passes through the gun body and then enters the guide component.

[0046] A fourth aspect of the present invention relates to a welding system, comprising the welding gun described in the third aspect of the present invention.

[0047] In the fourth aspect of the present invention, the welding system may further include other components, which are commonly used components in conventional metal electrode gas shielded welding systems in the field; for example: in some embodiments, the welding system also includes a power supply, a gas supply component, a wire feeding component and a control component; wherein the power supply is used to provide electrical energy to the system; the gas supply component is connected to the shielding gas inlet on the top plate, and is used to provide shielding gas; the wire feeding component is used to pull the welding wire from the wire reel and then feed it into the welding wire inlet of the top plate; the control component is used to control the overall operation of the system; for example, in some embodiments, on the basis of the foregoing, the welding system also includes a cooling water system for cooling the welding gun.

[0048] In some embodiments of the fourth aspect of the present invention, the welding system is selected from a metal-conducting CO2 gas shielded welding system, a metal-conducting inert gas shielded welding system, and a metal-conducting active gas shielded welding system.

[0049] A fifth aspect of the present invention relates to a welding system, comprising the device described in the second aspect of the present invention and a welding gun, wherein the welding gun is a non-metallic electrode gas shielded welding gun or a plasma arc welding gun.

[0050] In some embodiments of the fifth aspect of the present invention, the non-metallic electrode gas shielded welding gun is a tungsten inert gas shielded welding gun, preferably selected from a tungsten electrode argon arc welding gun and a tungsten electrode helium arc welding gun.

[0051] In some embodiments of the fifth aspect of the present invention, the guide component is a wire feeding nozzle, which is used to control the feeding direction of the welding wire.

[0052] In some embodiments of the fifth aspect of the present invention, the tubular component is fixedly connected to the wire feeding nozzle by a clamp.

[0053] In the fifth aspect of the present invention, the non-metallic electrode gas shielded welding gun is a conventional non-metallic electrode gas shielded welding gun in the art, and those skilled in the art are familiar with its structure and use method.

[0054] In the fifth aspect of the present invention, the plasma arc welding gun is a conventional plasma arc welding gun in the art, and those skilled in the art are familiar with its structure and use method.

[0055] In the fifth aspect of the present invention, the welding system may further include other components, which are commonly used components in conventional non-melting electrode gas shielded welding systems in the field; for example: in some embodiments, the welding system also includes a power supply, a gas supply component and a control component; wherein the power supply is used to provide electrical energy to the system; the gas supply component is used to provide shielding gas to the welding gun; the control component is used to control the overall operation of the system; for example, in some embodiments, on the basis of the foregoing, the welding system also includes a cooling water system for cooling the welding gun.

[0056] In the fifth aspect of the present invention, the welding system may further include other components, which are commonly used components in conventional plasma arc welding systems in the field; for example: in some embodiments, the welding system also includes a power supply, a gas supply circuit, a control circuit and a cooling water circuit; wherein the power supply is used to provide electrical energy to the system; the gas supply circuit is composed of a plasma gas circuit, and a shielding gas circuit, etc., and is used to provide plasma gas and shielding gas to the welding gun; the control circuit is used to control the overall operation of the system; and the cooling water circuit is used to cool the welding gun.

[0057] The sixth aspect of the present invention relates to a method for coating an activator on a welding wire, which adopts the mechanism described in the first aspect of the present invention; wherein,

[0058] The method comprises the following steps:

[0059] First, one end of the welding wire is passed through the through hole of the tubular component, and then the pumping device is turned on to allow the activator to circulate between the storage component, the connecting pipeline and the tubular component. Then, the welding wire is continuously passed through the through hole of the tubular component to coat the activator on the surface of the welding wire.

[0060] In some embodiments of the sixth aspect of the present invention, the amount of activator coated on the welding wire can also be adjusted by combining changing the diameter of the through hole of the tubular component, controlling the pressure of the pumping equipment and the speed at which the welding wire passes through the through hole.

[0061] In some embodiments of the sixth aspect of the present invention, when the diameter of the through hole of the tubular component remains unchanged, the coating amount of the activator on the welding wire is adjusted by controlling the pressure of the pumping equipment and the speed at which the welding wire passes through the through hole.

[0062] In some embodiments of the sixth aspect of the present invention, when the diameter of the through hole of the tubular component remains unchanged, a uniform coating of the activator on the surface of the welding wire is obtained by maintaining a certain pressure of the pumping equipment and a certain speed of the welding wire passing through the through hole.

[0063] In some embodiments of the sixth aspect of the present invention, when the diameter of the through hole of the tubular component remains unchanged, the amount of activator coated on the welding wire is increased by increasing the pressure of the pumping equipment and / or reducing the speed at which the welding wire passes through the through hole. For example, increasing the amount of activator coated on the welding wire can thicken the coating of the activator on the surface of the welding wire.

[0064] In some embodiments of the sixth aspect of the present invention, when the diameter of the through hole of the tubular component remains unchanged, the amount of activator coated on the welding wire is reduced by reducing the pressure of the pumping equipment and / or increasing the speed at which the welding wire passes through the through hole. For example, reducing the amount of activator coated on the welding wire can make the coating of the activator on the surface of the welding wire thinner.

[0065] In some embodiments of the sixth aspect of the present invention, for the paste activator, the amount of activator applied on the welding wire can also be increased by increasing the viscosity of the activator; for example, under the premise of maintaining a certain through-hole diameter, pumping equipment pressure and a certain speed at which the welding wire passes through the through-hole, the coating thickness of the activator on the surface of the welding wire can be increased by increasing the viscosity of the paste activator; similarly, for the paste activator, the amount of activator applied on the welding wire can also be reduced by reducing the viscosity of the activator.

[0066] The seventh aspect of the present invention relates to a welding method, which uses the welding gun described in the third aspect of the present invention or the welding system described in the fourth aspect of the present invention; wherein:

[0067] The method comprises the following steps:

[0068] (1) Pass the welding wire through the perforation on the guide member to make the welding wire charged;

[0069] (2) applying an activating agent to a live welding wire according to the method of the sixth aspect of the present invention;

[0070] (3) Arc welding is performed under gas protection using an active agent-coated charged wire.

[0071] In some embodiments of the seventh aspect of the present invention, the gas is selected from a mixture of one or more of carbon dioxide, helium, argon, nitrogen and hydrogen.

[0072] In some embodiments of the seventh aspect of the present invention, before step (1), the welding wire is straightened.

[0073] The eighth aspect of the present invention relates to a welding method, which adopts the welding system described in the fifth aspect of the present invention; wherein:

[0074] The method comprises the following steps:

[0075] 1) passing the welding wire through the through hole on the guide component, and then coating the welding wire with an activating agent according to the method described in the sixth aspect of the present invention;

[0076] 2) Use welding wire coated with activator and welding gun for arc welding.

[0077] In some implementations of the eighth aspect of the present invention, in step 2), during welding, the welding wire and the welding gun form an angle of 45 degrees.

[0078] In some implementations of the eighth aspect of the present invention, before step 1), the welding wire is straightened.

[0079] In the present invention, unless otherwise specified, wherein:

[0080] The term "metal-shielded gas welding" refers to a welding method that uses the arc between the fusible welding wire and the workpiece as a heat source to melt the welding wire and the parent metal, and delivers a shielding gas to the welding area to protect the arc, molten welding wire, molten pool and the parent metal of the accessories from the harmful effects of the surrounding air. "Metal-shielded arc welding gun" refers to a welding gun specifically used for metal-shielded gas welding.

[0081] The term "gas shielded welding" refers to a welding method that uses the arc between the non-melting electrode and the workpiece as a heat source to melt the base metal and filler wire (filler wire may not be added), and delivers shielding gas to the welding area to protect the arc, non-melting electrode, base metal, filler wire, and molten pool from the harmful effects of the air.

[0082] The term "plasma arc welding" refers to a fusion welding method that utilizes a high energy density beam of a plasma arc as a welding heat source.

[0083] Beneficial effects achieved by the present invention:

[0084] The mechanism for coating the welding wire with the activator of the present invention can evenly coat the activator on the surface of the welding wire according to the required amount to obtain a weld with uniform penetration depth. The operation is simple, the amount of activator used is small, the environment is friendly, and the production efficiency is high.

[0085] The consumable electrode gas shielded welding system, the non-consumable electrode gas shielded welding system and the plasma arc welding system of the present invention can obtain welds with uniform and consistent penetration depths, are simple to operate, are environmentally friendly and have high production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0086] In order to make the content of the present invention more clearly understood, the present invention is further described in detail below according to specific embodiments of the present invention in conjunction with the accompanying drawings, wherein

[0087] Figure 1 A schematic diagram of the prior art using active agent welding;

[0088] Figure 2It is a structural schematic diagram of an embodiment of a mechanism for coating an activating agent on a welding wire according to the present invention;

[0089] Figure 3 It is a structural schematic diagram of an embodiment of a device for conveying welding wire of the present invention;

[0090] Figure 4 It is a schematic structural diagram of an embodiment of a metal-electrode gas shielded welding gun of the present invention;

[0091] Figure 5 It is a structural schematic diagram of an embodiment of a non-metallic electrode gas shielded welding system of the present invention;

[0092] Figure 6 A schematic structural diagram of an embodiment of a plasma arc welding system of the present invention;

[0093] in:

[0094] 1-1 is an activating agent; 1-2 is a working piece; 1-3 is a welding gun; 1-4 is a molten pool; 1-5 is a weld; 2-1 is a storage component; 2-2 is a tubular component; 2-3 is a connecting pipeline; 2-4 is a pumping device; 2-5 is a through hole; 2-6 is a vibrating component; 2-7 is a welding wire; 2-8 is a guide component; 2-9 is a perforation; 2-10 is a gun body; 2-11 is a protective cover; 2-12 is a channel; 2-13 is a non-melting electrode gas shielded welding gun; 2-14 is a plasma arc welding gun. DETAILED DESCRIPTION

[0095] The embodiments of the present invention will be described clearly and completely below in conjunction with the examples. Obviously, the described examples are only some examples of the present invention, rather than all examples. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the examples in the present invention, all other examples obtained by ordinary technicians in the field without creative work are within the scope of protection of the present invention.

[0096] Figure 2 It is a schematic structural diagram of an embodiment of a mechanism for coating an activating agent on a welding wire according to the present invention.

[0097] The mechanism for coating the welding wire with an active agent comprises a storage component 2-1, a tubular component 2-2, a connecting pipeline 2-3 and two pumping devices 2-4; wherein,

[0098] The storage component 2-1 is provided with an inlet B and an outlet A, and is used to store the active agent;

[0099] The two ends of the tubular component 2-2 are connected to the inlet B and the outlet A of the storage component respectively through the connecting pipeline 2-3, and a through hole 2-5 suitable for the welding wire 2-7 to pass through is provided along the radial direction of the tubular component 2-2;

[0100] The pumping device 2-4 is arranged at the inlet B and / or outlet A of the storage component 2-1, or is arranged on the connecting pipeline 2-3 connected to the inlet B and / or outlet A of the storage component 2-1, and is used to circulate the active agent and regulate the pressure at the position of the through hole 2-5 of the tubular component 2-2.

[0101] In one embodiment of the present invention, the diameter of the through hole 2-5 of the tubular component 2-2 is 0.6-6.2 mm.

[0102] In one embodiment of the present invention, the diameter of the through hole 2-5 of the tubular component 2-2 is 0.1-3 mm larger than the diameter of the welding wire 2-7 suitable for passing through the through hole 2-5.

[0103] In one embodiment of the present invention, the inner diameter of the tubular component 2-2 is 1-10 mm.

[0104] In one embodiment of the present invention, the through hole 2-5 is located in the middle of the tubular component 2-2 in the length direction.

[0105] In one embodiment of the present invention, the inlet B and the outlet A of the storage component 2-1 are each provided with a pumping device 2-4.

[0106] In one embodiment of the present invention, the active agent is in the form of a paste.

[0107] In one embodiment of the present invention, the pumping device 2-4 is a fluid peristaltic pump, and its pressure parameters can be adjusted.

[0108] In one embodiment of the present invention, a vibration component 2-6 is provided in the storage component 2-1 for mixing the paste-like active agent.

[0109] In one embodiment of the present invention, both ends of the tubular component 2 - 2 are far away from the locations to be welded.

[0110] In one embodiment of the present invention, the radial dimension of the connecting pipeline 2-3 is the same as the radial dimension of the tubular component 2-2.

[0111] In one embodiment of the present invention, the diameter of the applicable welding wire 2-7 is 0.5~3.2mm.

[0112] use Figure 2When the mechanism shown is used to coat the welding wire 2-7 with the activating agent, one end of the welding wire 2-7 is first inserted into the through hole 2-5 of the tubular component 2-2, and then the pumping device 2-4 is turned on to allow the activating agent to circulate between the storage component 2-1, the connecting pipeline 2-3 and the tubular component 2-2, and then the welding wire 2-7 is continuously passed through the through hole 2-5 on the tubular component 2-2 to coat the activating agent on the surface of the welding wire 2-7. When the diameter of the through hole 2-5 of the tubular component 2-2 remains unchanged, during the coating process, the amount of the activating agent coated on the welding wire 2-7 is adjusted by controlling the pressure of the pumping device 2-4 and the speed at which the welding wire 2-7 passes through the through hole 2-5. For example, a uniform coating of the activating agent on the surface of the welding wire 2-7 is obtained by maintaining a certain pressure of the pumping device 2-4 and a certain speed at which the welding wire 2-7 passes through the through hole 2-5.

[0113] Figure 3 It is a schematic structural diagram of an embodiment of a device for conveying welding wire according to the present invention.

[0114] The device for conveying welding wire includes a guide member 2-8 and Figure 2 The mechanism shown; wherein, the guide component 2-8 and the tubular component 2-2 are arranged in sequence along the length direction of the welding wire 2-7 from far away from the position to be welded to close to the position to be welded, and the guide component 2-8 is penetrated by a through hole 2-9 suitable for the welding wire 2-7 to pass through, and the through hole 2-9 is coaxial with the through hole 2-5 of the tubular component 2-2, and the guide component 2-8 is used to control the conveying direction of the welding wire 2-7 and optionally conduct current to the welding wire 2-7.

[0115] In one embodiment of the present invention, the distance between the guide component 2-8 and the tubular component 2-2 is 0.5-10 mm.

[0116] In one embodiment of the present invention, the guide component 2-8 is a conductive nozzle, which is used to control the conveying direction of the welding wire 2-7 and conduct current to the welding wire 2-7.

[0117] In another embodiment of the present invention, the guide component 2-8 is a wire feeding nozzle for controlling the feeding direction of the welding wire 2-7, and the tubular component 2-2 is fixedly connected to the wire feeding nozzle by a clamp.

[0118] In one embodiment of the present invention, the diameter of the through hole 2-9 of the guide member 2-8 is the same as the diameter of the through hole 2-5 of the tubular member 2-2.

[0119] Figure 4 The figure is a schematic structural diagram of an embodiment of a metal-electrode gas shielded welding gun of the present invention.

[0120] The metal-metal gas shielded welding gun comprises a gun body 2-10, a protective cover 2-11 and Figure 3The device shown in the figure; wherein, the gun body 2-10 and the guide component 2-8 and the tubular component 2-2 are arranged in sequence along the length direction of the welding wire 2-7 from far away from the welding position to close to the welding position, the protective cover 2-11 is covered on the outside of the guide component 2-8, and the gap between the protective cover 2-11 and the guide component 2-8 forms a channel 2-12 suitable for the flow of protective gas, the gun body 2-10 is connected to one end of the protective cover 2-11, and the tubular component 2-2 is located at the other end of the protective cover 2-11.

[0121] In one embodiment of the present invention, the protective cover 2-11 is covered on the outside of the partial tubular component 2-2 with the through hole 2-5 or on the outside of the entire tubular component 2-2.

[0122] In one embodiment of the present invention, the protective gas is a mixed gas selected from one or more of carbon dioxide, helium, argon, nitrogen and hydrogen.

[0123] In one embodiment of the present invention, both ends of the tubular component 2-2 are located outside the protective cover 2-11 and away from the protective cover 2-11.

[0124] In one embodiment of the present invention, the outer wall of the tubular component 2 - 2 is provided with an insulating layer.

[0125] In one embodiment of the present invention, the guide component 2-8 is a conductive nozzle, which is used to control the conveying direction of the welding wire 2-7 and conduct current to the welding wire 2-7.

[0126] In one embodiment of the present invention, one end of the protective cover 2-11 is connected to the gun body 2-10 through an insulating layer.

[0127] In one embodiment of the present invention, the metal-metal gas shielded welding gun is selected from a metal-metal CO2 gas shielded welding gun, a metal-metal inert gas shielded welding gun and a metal-metal active gas shielded welding gun.

[0128] Another embodiment of the present invention relates to a metal-electrode gas shielded welding system, comprising: Figure 4 MIG / MAG welding torch shown.

[0129] use Figure 4 When welding with the metal-metal-shielded gas welding gun or the metal-metal-shielded gas welding system shown in the figure, first, the welding wire 2-7 is passed through the perforation 2-9 on the guide member 2-8 to make the welding wire 2-7 charged, and then, according to the above-mentioned use Figure 2 The method for coating the welding wire 2-7 with an activator by the mechanism shown is to coat the activator on the charged welding wire 2-7, and finally, arc welding is performed under gas protection using the charged welding wire 2-7 coated with the activator. The gas is selected from a mixed gas of one or more of carbon dioxide, helium, argon, nitrogen and hydrogen.

[0130] Figure 5 The figure is a schematic structural diagram of an embodiment of a non-metallic electrode gas shielded welding system of the present invention.

[0131] The non-metallic electrode gas shielded welding system comprises Figure 3 The device and non-metallic electrode gas shielded welding gun 2-13 are shown.

[0132] In one embodiment of the present invention, the non-metallic electrode gas shielded welding gun 2-13 is a tungsten electrode argon arc welding gun.

[0133] In one embodiment of the present invention, the guide component 2-8 is a wire feeding nozzle, which is used to control the feeding direction of the welding wire 2-7.

[0134] In one embodiment of the present invention, the tubular component 2-2 is fixedly connected to the wire feeding nozzle by a clamp.

[0135] Figure 6 It is a schematic structural diagram of an embodiment of a plasma arc welding system of the present invention.

[0136] The plasma arc welding system comprises Figure 3 The device and plasma arc welding gun 2-14 are shown.

[0137] In one embodiment of the present invention, the guide component 2-8 is a wire feeding nozzle, which is used to control the feeding direction of the welding wire 2-7.

[0138] In one embodiment of the present invention, the tubular component 2-2 is fixedly connected to the wire feeding nozzle by a clamp.

[0139] use Figure 5 Non-metallic gas shielded welding system or Figure 6 When welding with the plasma arc welding system, first, the welding wire 2-7 is passed through the perforation 2-9 of the guide member 2-8, and then the welding wire 2-7 is passed through the perforation 2-9 of the guide member 2-8 according to the aforementioned Figure 2 The method of using the mechanism shown is to coat the welding wire 2-7 with an activator, and then use the welding wire 2-7 coated with the activator in conjunction with a welding gun for arc welding. During welding, the welding wire and the welding gun form an angle of 45 degrees.

[0140] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.

Claims

1. A mechanism for coating a welding wire with an active agent, comprising a storage component, a tubular component, a connecting pipeline and at least one pumping device; wherein: A storage component, provided with an inlet and an outlet, for storing an active agent; The two ends of the tubular component are respectively connected to the inlet and outlet of the storage component through connecting pipelines, and a through hole suitable for the welding wire to pass through is provided along the radial direction of the tubular component; The pumping device is arranged at the inlet and / or outlet of the storage component, or arranged on the connecting pipeline connected to the inlet and / or outlet of the storage component, for circulating the active agent and regulating the pressure at the through hole position of the tubular component.

2. The mechanism according to claim 1, wherein: The diameter of the through hole of the tubular component is 0.02-3.3 mm larger than the diameter of the welding wire suitable for passing through the through hole.

3. The mechanism according to claim 1, wherein: The diameter of the through hole of the tubular component is 0.5 to 6.5 mm.

4. The mechanism according to any one of claims 1 to 3, characterized in that One or more of the following (A) to (H): (A) The inner diameter of the tubular component is 1~10mm; (B) the through hole is located in the middle of the length direction of the tubular component; (C) the inlet and outlet of the storage unit are each provided with a pumping device; (D) The pumping equipment is a peristaltic pump; (E) further comprising a vibrating component disposed in the storage component for mixing the paste-like active agent or vibrating the powder-like active agent; (F) The active agent is in powder or paste form; (G) The pressure parameters of the pumping equipment are adjustable; (H) Both ends of the tubular component are away from the points to be welded.

5. The mechanism according to any one of claims 1 to 3, wherein: The pumping device is selected from a fluid peristaltic pump and a powder peristaltic pump.

6. A device for conveying welding wire, comprising a guide component and a mechanism according to any one of claims 1 to 5; wherein: The guide component and the tubular component are arranged in sequence along the length direction of the welding wire from far away from the welding position to close to the welding position. The guide component is penetrated by a through hole suitable for the welding wire to pass through. The through hole is coaxial with the through hole of the tubular component. The guide component is used to control the conveying direction of the welding wire and optionally conduct current to the welding wire.

7. The device according to claim 6, wherein: The guide member is connected to the tubular member.

8. A welding gun, comprising a gun body, a protective cover and the device according to claim 6 or 7; wherein: The gun body, the guide component and the tubular component are arranged in sequence along the length direction of the welding wire from far away from the position to be welded to close to the position to be welded. The protective cover is covered on the outside of the guide component, and the gap between the protective cover and the guide component forms a channel suitable for the flow of protective gas. The gun body is connected to one end of the protective cover, and the tubular component is located at the other end of the protective cover; the welding gun is a metal-metal gas shielded welding gun.

9. The welding gun according to claim 8, wherein: The protective cover is coated on the outside of a portion of the tubular component with the through hole or on the outside of the entire tubular component.

10. The welding gun according to claim 8, wherein: The protective gas is a mixed gas selected from one or more of carbon dioxide, helium, argon, nitrogen and hydrogen.

11. The welding gun according to claim 8, wherein: Both ends of the tubular component are located outside the protective cover and away from the protective cover.

12. The welding gun according to claim 8, wherein: The guiding component is a conductive nozzle.

13. The welding gun according to any one of claims 8 to 12, wherein: The outer wall of the tubular member is provided with an insulating layer.

14. A welding system, comprising the welding gun according to any one of claims 8 to 13.

15. A welding system, comprising the device according to claim 6 or 7 and a welding gun, wherein: The welding gun is a non-metallic electrode gas shielded welding gun or a plasma arc welding gun.

16. The welding system of claim 15, wherein: The non-metallic electrode gas shielded welding gun is a tungsten electrode inert gas shielded welding gun.

17. The welding system of claim 15, wherein: The non-metallic electrode gas shielded welding gun is selected from a tungsten inert gas welding gun and a tungsten inert helium arc welding gun.

18. The welding system according to any one of claims 15 to 17, wherein: The guiding component is a wire feeding nozzle, and the tubular component is connected with the wire feeding nozzle through a clamp.

19. A method for coating an activator on a welding wire, using the mechanism described in any one of claims 1 to 5; wherein: The method comprises the following steps: First, one end of the welding wire is passed through the through hole of the tubular component, and then the pumping device is turned on to allow the activator to circulate between the storage component, the connecting pipeline and the tubular component. Then, the welding wire is continuously passed through the through hole of the tubular component to coat the activator on the surface of the welding wire.

20. A welding method, using the welding gun according to any one of claims 8 to 13 or the welding system according to claim 14; wherein: The method comprises the following steps: (1) Pass the welding wire through the perforation on the guide member to make the welding wire charged; (2) Coating an activating agent on a live welding wire according to the method of claim 19; (3) Arc welding is performed under gas protection using an active agent-coated charged wire.

21. The welding method according to claim 20, wherein: Prior to step (1), the welding wire is straightened.

22. A welding method, which uses the welding system according to any one of claims 15 to 18; wherein: The method comprises the following steps: 1) passing a welding wire through a through hole in a guide member, and then coating the welding wire with an activating agent according to the method of claim 19; 2) Use welding wire coated with activator and welding gun for arc welding.

23. The welding method according to claim 22, wherein: Prior to step 1), the welding wire is straightened.

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