Single-power-supply double-wire welding gun

Abstract

The utility model discloses a single-power double-wire welding gun which comprises a contact tube, the contact tube comprises a first circular truncated cone section, a first cylindrical section and a first threaded section which are sequentially connected, the small head end of the first circular truncated cone section is far away from the first cylindrical section, the large head end of the first circular truncated cone section is matched with the first cylindrical section, and the diameter of the first threaded section is smaller than that of the first cylindrical section; welding wire holes are formed in the centers of the first circular truncated cone section, the first cylindrical section and the first threaded section, and are used for accommodating two welding wires; the contact tube seat is connected with the first threaded section; the nozzle comprises a gas injection section and a connecting section, the conductive nozzle seat is sleeved with the gas injection section, the connecting section is connected with the tip of the gun head, and protective gas is injected into the nozzle. Through inclined arrangement of the first circular truncated cone shape of the contact tube, the space between the contact tube seat and the nozzle can be enlarged, and the arc form stability and the welding quality stability are guaranteed; one welding wire hole can contain two welding wires at the same time, welding wire forking is avoided, and the welding quality is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to welding torch technical field especially single power double wire welding torch. BACKGROUND

[0002] Double wire welding torch can significantly improve welding speed and penetration by using two welding wires simultaneously. This welding method is particularly suitable for thick plate welding or situations where rapid welding is required, as it can provide a more stable arc and reduce spatter during welding. In addition, double wire welding torch can also reduce welding deformation, as the two welding wires can be controlled separately, thereby better controlling heat input and stress distribution during welding.

[0003] The double wire welding torch in the prior art is a double-hole conducting nozzle, the space between the inner thread of the nozzle and the outer sleeve is two parts, and the middle is clamped with an insulating sleeve, which is easy to be damaged, leading to the connection of the nozzle and the conducting nozzle seat and the conducting nozzle. In addition, the existing nozzle is not suitable for the welding angle, and the welded seam is prone to porosity and other problems. SUMMARY

[0004] The utility model aims at least solves one of prior art or related art existing technical problems.

[0005] Therefore, the utility model provides a single power double wire welding torch, wherein the single power double wire welding torch is arranged obliquely through the first circular table of the conducting nozzle, can increase the space between the conducting nozzle seat and the nozzle, and ensure the stability of the arc shape and the stability of the welding quality; one welding wire hole can accommodate two welding wires, avoid the bifurcation of the welding wire, and ensure the quality of the welding.

[0006] Specifically, the technical scheme comprises the following:

[0007] The utility model provides a single power double wire welding torch, the single power double wire welding torch includes:

[0008] The conducting nozzle includes a first circular table section, a first cylinder section and a first thread section connected in sequence, the small end of the first circular table section is arranged away from the first cylinder section, the large end of the first circular table section is matched with the first cylinder section, the diameter of the first thread section is smaller than that of the first cylinder section, and a welding wire hole is arranged at the center of the first circular table section, the first cylinder section and the first thread section, and the welding wire hole is used for accommodating two welding wires;

[0009] The conducting nozzle seat is connected with the first thread section;

[0010] The nozzle includes a gas injection section and a connecting section, the gas injection section is sleeved on the conducting nozzle seat, the connecting section is connected with the gun head end, and the nozzle injects shielding gas.

[0011] Optionally, the single power double wire welding torch further comprises:

[0012] An insulating shunt is sheathed on the conductive nozzle seat, and the insulating shunt is located on the side of the gun head end facing the conductive nozzle seat.

[0013] Optionally, a plurality of diversion holes are provided on a side of the insulating diverter facing the conductive nozzle, and the plurality of diversion holes are evenly distributed in a ring shape.

[0014] Optionally, the single-power-supply twin-wire welding gun further includes:

[0015] An insulating gasket is arranged between the end of the gun head and the insulating separator. An annular groove is provided on the side of the end of the gun head facing the conductive nozzle seat, and the insulating gasket is arranged in the annular groove.

[0016] Optionally, the insulating shunt and insulating gasket are made of high-temperature resistant insulating material.

[0017] Optionally, the nozzle includes a second conical section, a second cylindrical section and a second threaded section connected in sequence, the second threaded section is detachably connected to the end of the gun head, the length of the second conical section is greater than the length of the first conical section, the second conical section and the second cylindrical section are the jet sections, and the second threaded section is the connecting section.

[0018] Optionally, the distance between the end of the second frustum section away from the gun tip end and the gun tip end is greater than the distance between the end of the first frustum section away from the gun tip end and the gun tip end.

[0019] Optionally, the single-power source dual-wire welding gun further includes: a wire feeding tube, the wire feeding tube is located at the center of the gun head end, and a coil spring is provided in the wire feeding tube.

[0020] Optionally, a receiving space is formed between the nozzle and the conductive nozzle, and the wire feeding tube, the conductive nozzle seat, the insulating diverter and the receiving space are connected to form a channel for the protective gas.

[0021] Optionally, the inner diameter of the welding wire hole is equal to the diameter of the two welding wires.

[0022] The single-power-supply double-wire welding gun provided by the embodiment of the utility model, wherein, the single-power-supply double-wire welding gun comprises a conducting nozzle, a conducting nozzle seat connected with the conducting nozzle, the conducting nozzle seat is sleeved on the conducting nozzle, further comprises a nozzle which is externally arranged on the conducting nozzle and the conducting nozzle seat and is used for spraying protective gas to form a welding gun.

[0023] The above description is only a summary of the technical scheme of the application, in order to more clearly understand the technical means of the application, the specific embodiments of the application can be implemented according to the content of the specification, and in order to make the above and other purposes, characteristics and advantages of the application more obvious and easy to understand, the following specific embodiments of the application are described. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the technical scheme in the embodiments of the utility model, the drawings needed in the embodiment description will be briefly introduced, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can be obtained according to these drawings without creative labor.

[0025] Figure 1 It is a schematic view of the single-power-supply double-wire welding gun according to an embodiment of the utility model;

[0026] Figure 2 It is a schematic view of the conducting nozzle according to an embodiment of the utility model;

[0027] Figure 3 It is a schematic view of the nozzle according to an embodiment of the utility model.

[0028] Among them, Figures 1 to 3 The correspondence between the reference signs and the component names in the drawings is as follows:

[0029] 100 single-power-supply double-wire welding gun, 110 welding wire, 120 conducting nozzle, 121 first circular table section, 122 first cylinder section, 123 first thread section, 124 welding wire hole, 130 insulating shunt, 140 nozzle, 141 second circular table section, 142 second cylinder section, 143 second thread section, 150 conducting nozzle seat, 160 insulating gasket, 170 gun head end, 180 wire feeding pipe. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0031] Before further describing the embodiments of the present invention in detail, the directional terms involved in the embodiments of the present invention, such as "upper part", "lower part" and "side part", do not have the meaning of limiting the scope of protection of the present invention.

[0032] In order to make the technical solutions and advantages of the present invention more clear, the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

[0033] Figure 1 Schematic diagram of a single-power-supply twin-wire welding gun according to one embodiment of the present utility model; Figure 2 Schematic diagram of a conductive nozzle according to an embodiment of the present invention.

[0034] like Figure 1 and Figure 2 As shown, one embodiment of the present invention provides a single-power source twin-wire welding gun 100, which includes:

[0035] The contact tip 120 includes a first frustum section 121, a first cylindrical section 122, and a first threaded section 123 connected in sequence. The small end of the first frustum section 121 is located away from the first cylindrical section 122, and the large end of the first frustum section 121 matches the first cylindrical section 122. The diameter of the first threaded section 123 is smaller than the diameter of the first cylindrical section 122. A welding wire hole 124 is defined at the center of the first frustum section 121, the first cylindrical section 122, and the first threaded section 123. The welding wire hole 124 is used to accommodate two welding wires 110.

[0036] The conductive nozzle seat 150 is connected to the first threaded section 123;

[0037] The nozzle 140 includes an air jet section and a connecting section. The air jet section is mounted on the conductive nozzle holder 150 , and the connecting section is connected to the gun head end 170 . The protective gas is sprayed from the nozzle 140 .

[0038] The single power source double wire welding gun 100 comprises a conducting nozzle 120, a conducting nozzle seat 150 connected with the conducting nozzle 120, and a nozzle 140 arranged outside the conducting nozzle 120 and the conducting nozzle seat 150 for spraying protective gas to form a welding gun. The conducting nozzle 120 comprises a first circular truncated cone section 121, a first circular cylinder section 122 and a first threaded section 123 connected in sequence. The conducting nozzle 120 is arranged in the form of the first circular truncated cone section 121, which can increase the space volume between the conducting nozzle seat 150 and the nozzle 140, thereby increasing the flow of the protective gas sprayed near the welding wire 110, avoiding the influence of the surrounding air on the shape of the electric arc, ensuring the stability of the welding arc shape, and further ensuring the stability of the welding quality. Meanwhile, two welding wires 110 are arranged in one welding wire hole 124, which can avoid the branching of the welding wire 110 during welding, thereby affecting the welding quality and ensuring the stability of the welding quality.

[0039] In the embodiment, the diameter of the small end of the first circular truncated cone section 121 is 7 mm, the diameter of the large end is 10 mm, the diameter of the first circular cylinder section 122 is 10 mm, the outer diameter of the first threaded section 123 is 8 mm, and the length of the first circular truncated cone section 121, the first circular cylinder section 122 and the first threaded section 123 is 10 mm. In this way, the nozzle 140 is sleeved on the conducting nozzle 120 (conducting nozzle seat 150), and the space volume formed by the inner wall of the nozzle 140 and the outer wall of the conducting nozzle 120 (conducting nozzle seat 150) is increased, thereby increasing the flow of the protective gas, making the protection of the welding process by the protective gas more sufficient, and ensuring the stability of the welding arc shape and the stability of the welding quality. Meanwhile, the conducting nozzle seat 150 is connected with the first threaded section 123 through internal threads, realizing the detachable connection of the conducting nozzle 120 and the conducting nozzle seat 150. On the one hand, the tightness of the connection of the conducting nozzle 120 and the conducting nozzle seat 150 and the convenience of disassembly and assembly are improved. On the other hand, the threaded connection of the conducting nozzle seat 150 can reduce the volume of the conducting nozzle seat 150, thereby increasing the space volume between the conducting nozzle 120 and the nozzle 140, thereby increasing the flow of the protective gas, making the protection of the welding process by the protective gas more sufficient, and ensuring the stability of the welding arc shape and the stability of the welding quality. Two welding wires 110 are arranged in one welding wire hole 124, and the two welding wires 110 are directly melted into one thicker welding wire 110 after the conducting nozzle 120 is electrified. The branching of the welding wire 110 is avoided, thereby improving the welding quality.

[0040] In a feasible implementation manner, the single power source double wire welding gun 100 further comprises:

[0041] The insulating shunt 130 is sleeved on the conducting nozzle seat 150, and the insulating shunt 130 is located on the side of the gun head end 170 facing the conducting nozzle seat 150.

[0042] Wherein, by setting an insulating shunt 130 between the conductive nozzle seat 150 and the nozzle 140, the insulation between the nozzle 140 and the conductive nozzle 120 can be ensured, avoiding the electric quantity of the conductive nozzle seat 150 and the conductive nozzle 120 being transmitted to the nozzle 140, that is, avoiding the nozzle 140 being connected with the conductive nozzle 120, on the one hand, the safety of the single power source double wire welding gun 100 can be ensured, on the other hand, the damage of the nozzle 140 can be avoided, the service life of the nozzle 140 can be ensured, and the service life of the single power source double wire welding gun 100 can be ensured.

[0043] In a feasible implementation, a plurality of shunt holes are arranged on the side of the insulating shunt 130 facing the conductive nozzle 120, and the plurality of shunt holes are evenly distributed in a ring shape.

[0044] Wherein, a plurality of shunt holes are arranged in the insulating shunt 130, and the plurality of shunt holes are evenly arranged in a circular ring shape on the side of the insulating shunt 130 facing the conductive nozzle 120, that is, a plurality of shunt holes are arranged on the side of the insulating shunt 130 facing the gas outlet hole of the nozzle 140, the protective gas is sprayed out through the shunt holes in addition to being sprayed out in the nozzle 140, the uniformity of the protective gas sprayed out can be ensured, and the reliability of the protective gas for welding protection can be improved, the contact with water vapor and oxygen in the air during welding is prevented, the oxidation and pollution of the weld are avoided, and the welding quality is ensured.

[0045] In a feasible implementation, the single power source double wire welding gun 100 further comprises:

[0046] The insulating gasket 160 is arranged between the gun head end 170 and the insulating separator 130, and the gun head end 170 is provided with a ring-shaped groove on the side facing the conductive nozzle seat 150, and the insulating gasket 160 is arranged in the ring-shaped groove.

[0047] Wherein, the insulating gasket 160 is arranged between the conductive nozzle seat 150 and the gun head end 170, such as Figure 1 It can be seen that the insulating gasket 160 is located below the insulating separator 130 and the conductive nozzle seat 150 at the same time, and the conductive nozzle seat 150 and the gun head end 170 are isolated, avoiding the conductive nozzle seat 150 or the conductive nozzle 120 being connected with the gun head end 170, on the one hand, the safety of the single power source double wire welding gun 100 can be ensured, on the other hand, the damage of the gun head end 170 can be avoided, and the service life of the single power source double wire welding gun 100 can be ensured.

[0048] In a feasible implementation, the insulating shunt 130 and the insulating gasket 160 are made of high-temperature-resistant insulating materials.

[0049] The high-temperature-resistant insulating material can be ceramic, thermoplastic polyimide or high-temperature-resistant silicone rubber. The working temperature of the insulating part made of ceramic is-196 DEG C to 650 DEG C, the working temperature of the insulating part made of thermoplastic polyimide is-269 DEG C to 280 DEG C, and the working temperature of the insulating part made of high-temperature-resistant silicone rubber is-60 DEG C to 300 DEG C. According to the welding temperature, the insulating shunt 130 and the insulating gasket 160 are usually made of thermoplastic polyimide or high-temperature-resistant silicone rubber due to the fragility of ceramic.

[0050] Figure 3 A schematic view of a nozzle according to an embodiment of the application.

[0051] In one possible implementation, as shown in Figure 3 The nozzle 140 comprises a second circular frustum segment 141, a second cylindrical segment 142 and a second threaded segment 143 connected in sequence, the second threaded segment 143 is detachably connected with the gun head end 170, the length of the second circular frustum segment 141 is greater than that of the first circular frustum segment 121, the second circular frustum segment 141 and the second cylindrical segment 142 are jet segments, and the second threaded segment 143 is a connecting segment.

[0052] In this embodiment, the outer diameter of the small end of the second circular frustum segment 141 is 20 mm, the outer diameter of the large end is 24 mm, the outer diameter of the second cylindrical segment 142 is 24 mm, the outer diameter of the second threaded segment 143 is 26 mm, the length of the second circular frustum segment 141 is 24 mm, the length of the second threaded segment 143 is 20 mm, and the length of the second cylindrical segment 142 is 22 mm. The second cylindrical segment 142 and the second threaded segment 143 are connected by chamfering or smooth transition, the wall thickness of the second circular frustum segment and the second cylindrical segment is 2 mm in this embodiment, the second threaded segment is an internal thread, and the model of the internal thread is M24.

[0053] It can be understood that the gun head end 170 is provided with an external thread, the external thread is connected with the internal thread of the second threaded segment 143, the detachable connection between the gun head end 170 and the nozzle 140 is realized, on the one hand, the convenience of disassembly and assembly is improved, on the other hand, the insulating shunt 130 does not need to be clamped through the nozzle 140, meanwhile, the insulating shunt 130 and the conductive nozzle seat 150 are also threadedly connected, the service life of the insulating shunt 130 can be ensured, the continuous electricity between the nozzle 140 and the conductive nozzle 120 and the conductive nozzle seat 150 is avoided, the service life of the nozzle 140 is improved, the service life of the insulating shunt 130 is improved, the replacement cost is reduced, and the economy is improved. At the same time, such a size setting can not only meet the reliable connection of the existing gun head end 170, but also meet the accommodation space between the conductive nozzle 120 and the nozzle 140, and improve the gas flow of the protective gas.

[0054] It should be noted that the second circular segment 141 is arranged so that the outside of the nozzle 140 is conical, which can make the single power double-wire welding gun 100 suitable for different welding angles, thereby avoiding the situation that the angle is not suitable during the welding process, causing one of the welding wires 110 to be thrown away and pores to be generated on the weld, that is, through the inclined arrangement of the outer wall of the second circular segment 141, the welding quality can be further improved.

[0055] In a feasible implementation, the distance between the end of the second circular segment 141 away from the gun head end 170 and the gun head end 170 is greater than the distance between the end of the first circular segment 121 away from the gun head end 170 and the gun head end 170.

[0056] In a feasible implementation, the distance between the end of the second circular segment 141 away from the gun head end 170 and the gun head end 170 is greater than the distance between the end of the first circular segment 121 away from the gun head end 170 and the gun head end 170, that is, after the welding wire 110 extends out of the conducting nozzle, there is still a segment of the welding wire 110 located in the nozzle 140, which can make the shielding gas fully wrap around the welding wire 110, thereby improving the safety and stability of the subsequent welding quality.

[0057] In a feasible implementation, the single power double-wire welding gun 100 further comprises a wire feeding pipe 180, which is located at the center of the gun head end 170, and a spiral spring is arranged in the wire feeding pipe 180.

[0058] In a feasible implementation, the wire feeding pipe 180 is arranged at the center of the gun head end 170, and a spiral spring is arranged in the wire feeding pipe 180, which can reduce the friction between the welding wire 110 and the wire feeding pipe 180, on the one hand, which helps to improve the service life of the gun head end 170, and on the other hand, which ensures the smoothness of the welding wire 110.

[0059] In a feasible implementation, the nozzle 140 and the conducting nozzle 120 form an accommodation space, the wire feeding pipe 180, the conducting nozzle seat 150, the insulating diverter 130, and the accommodation space are in communication, forming a channel for the shielding gas.

[0060] It can be understood that, in order to avoid multiple punching, the shielding gas is fed through the wire feeding pipe 180, then part of it enters the welding wire hole 124, and part of it enters the conducting nozzle seat 150 and the insulating diverter 130 through the channel, the shielding gas entering the insulating diverter 130 is sprayed out through the multiple diverter holes, and the shielding gas continues to enter the accommodation space formed by the nozzle 140 and the conducting nozzle seat 150 through the channel, and the shielding gas can also be sprayed out through the space, which improves the flow and uniformity of the shielding gas, thereby improving the welding quality.

[0061] In the embodiment, the protective gas is argon, which can prevent the welding wire 110 and the weld from contacting oxygen and water vapor in the air, avoid oxidation and pollution of the weld, and improve the welding quality.

[0062] In an embodiment, the inner diameter of the welding wire hole is equal to the diameter of the two welding wires 110.

[0063] In the embodiment, the diameter of a single welding wire 110 is usually 1.2 mm, and the diameter of the two welding wires 110 is 2.4 mm, so that the inner diameter of the welding wire hole 124 is 2.4 mm, and the welding wire hole 124 closely fits the two welding wires 110, which can straighten the welding wires 110 to some extent during the wire feeding welding process, thereby saving the use amount of the welding wires 110 and improving the uniformity of the weld, i.e., improving the welding quality.

[0064] It should be noted that the single-power double-wire welding gun 100 of the present application can be improved on the basis of the existing double-wire welding gun, i.e., only the conductive nozzle 120, the conductive nozzle seat 150, the insulating shunt 130, the insulating gasket 160, and the nozzle 140 need to be prepared, which can be adapted to the existing gun head end 170.

[0065] In the present application, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance. The term "a plurality of" refers to two or more, unless otherwise explicitly limited.

[0066] Other embodiments of the present application will be apparent to those skilled in the art from consideration of the specification and practice of the application disclosed herein. The present application is intended to cover any variations, uses, or adaptations of the application following, in general, the principles of the application and including such variations, uses, or adaptations of the application as come within the true scope of the application. The specification and examples are to be regarded as exemplary only.

[0067] The above is only a preferred embodiment of the present application, and is not intended to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A single power source twin-wire welding gun, characterized in that: The single power source double wire welding gun comprises: A conductive nozzle, comprising a first truncated cone segment, a first cylindrical segment, and a first threaded segment connected in sequence, wherein the small end of the first truncated cone segment is disposed away from the first cylindrical segment, the large end of the first truncated cone segment matches the first cylindrical segment, the diameter of the first threaded segment is smaller than the diameter of the first cylindrical segment, and a welding wire hole is provided at the center of the first truncated cone segment, the first cylindrical segment, and the first threaded segment, the welding wire hole being used to accommodate two welding wires; a conductive nozzle seat connected to the first threaded section; The nozzle comprises an air jet section and a connecting section. The air jet section is mounted on the conductive nozzle seat. The connecting section is connected to the end of the gun head. Protective gas is sprayed in the nozzle.

2. The single power source twin-wire welding gun according to claim 1, characterized in that: The single power source double wire welding gun also includes: An insulating shunt is sheathed on the conductive nozzle seat, and the insulating shunt is located on the side of the gun head end facing the conductive nozzle seat.

3. The single power source twin-wire welding gun according to claim 2, characterized in that: A plurality of diversion holes are provided on a side of the insulating diverter facing the conductive nozzle, and the plurality of diversion holes are evenly distributed in a ring shape.

4. The single power source twin-wire welding gun according to claim 2, characterized in that: The single power source double wire welding gun also includes: An insulating gasket is arranged between the end of the gun head and the insulating separator. An annular groove is provided on the side of the end of the gun head facing the conductive nozzle seat, and the insulating gasket is arranged in the annular groove.

5. The single power source twin-wire welding gun according to claim 4, characterized in that: The insulating shunt and insulating gasket are made of high-temperature resistant insulating materials.

6. The single power source twin-wire welding gun according to claim 1, characterized in that: The nozzle includes a second conical section, a second cylindrical section and a second threaded section connected in sequence, the second threaded section is detachably connected to the end of the gun head, the length of the second conical section is greater than the length of the first conical section, the second conical section and the second cylindrical section are the jet section, and the second threaded section is the connecting section.

7. The single power source twin-wire welding gun according to claim 6, characterized in that: The distance between the end of the second truncated cone section away from the end of the gun head and the end of the gun head is greater than the distance between the end of the first truncated cone section away from the end of the gun head and the end of the gun head.

8. The single power source twin-wire welding gun according to claim 2, characterized in that: The single-power double-wire welding gun further comprises a wire feeding tube, which is located at the center of the end of the gun head and has a coil spring inside.

9. The single power source twin-wire welding gun according to claim 8, characterized in that: An accommodating space is formed between the nozzle and the conductive nozzle, and the wire feeding tube, the conductive nozzle seat, the insulating diverter and the accommodating space are connected to form a channel for the protective gas.

10. The single power source twin-wire welding gun according to any one of claims 1 to 9, characterized in that: The inner diameter of the welding wire hole is equal to the diameter of the two welding wires.

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