Ray arc welding gun head magnetic ring protective sleeve

Abstract

The utility model discloses a magnetic ring protective sleeve for a pull arc welding gun head. A front embedding opening (1005) is concavely formed in the middle of the front end face of a composite protective sleeve (1); a flow equalizing gear ring (2005) is arranged on the edge of the front end of the magnetic sleeve (2) in a surrounding mode, and protruding blocks and grooves are evenly arranged on the flow equalizing gear ring (2005) in a surrounding mode at intervals. The magnetic sleeve (2) is integrally embedded into a front embedding opening (1005) in the front end face of the composite sheath (1). Welding quality can be guaranteed, environmental pollution can be reduced, and automation efficiency can be improved. The stud welding strength and efficiency are improved, the welding quality effect is stabilized, the operation process is simplified, and automation is easy to achieve. The device is high in air permeability and good in protection effect, does not need to be assembled and disassembled every time, enhances protection on the screws, and can realize continuous work and stable welding quality. The overall mechanical strength is improved, the requirements for insulation and uniform heat dissipation are met, breakage after welding is avoided, when the protective sleeve assembly is used in cooperation with a porcelain sleeve, the working structures and functions of the protective sleeve assembly and a welding gun are unified and coordinated, and the stability and safety in the welding process are ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of welding processing auxiliary processes of IPC classification B23K37 / 00, and particularly relates to a structural innovation and improvement technology of a magnetic ring and a protective cover assembly of a stud welding gun head. Background Art

[0002] Stud welding is a kind of stud welding that welds metal studs, bolts or screws to the workpiece. Stud welding ceramic ring is an annular ceramic molten pool that protects the metal melted by the discharge between the stud and the base material from leaking out. Drawn arc stud welding is a commonly used stud welding process, suitable for the connection of steel plates, reinforced concrete structures and other fields.

[0003] The ceramic ring of the welding nail can prevent the welding gun from damaging the gun tip when sparking at the welding point between the welding gun and the welding nail, and at the same time assist the molten iron to form, making the welding point more regular. The magnetic ring or ceramic sleeve plays a key role in this process, mainly providing protection and insulation functions. The ceramic sleeve can withstand harsh environments such as high temperature and high pressure, and has high hardness and wear resistance. It usually has good insulation properties and can act as insulation protection in high-voltage power equipment.

[0004] The original welding nail ceramic ring is usually a disposable item. After the welding nail is welded to the base material with the ceramic ring, the minimum inner diameter of the ceramic ring is almost the same as that of the welding nail. Although it plays a protective role, the ceramic ring cannot be removed after use. Usually, the ceramic ring is directly smashed and removed, which is wasteful and not environmentally friendly. Although the improved magnetic ring can be removed and reused after welding, the process is cumbersome.

[0005] For example, patent application 201420733655.5 discloses a reusable welding nail ceramic ring, including an outer ceramic ring and two inner ceramic rings, the outer ceramic ring is an integrated structure of two sections of annular cylinders, the middle of the outer ceramic ring is a cylindrical through hole, and the outer end of the annular cylinder with a larger outer diameter has a circle of tooth-shaped protrusions; the inner ceramic ring is a semi-cylindrical structure, and the two side surfaces of the two inner ceramic rings are respectively provided with protrusions and grooves, and the two inner ceramic rings are connected into a whole through the protrusions and grooves; the outer diameter of the semi-cylinder of the inner ceramic ring is the same as the inner diameter of the annular cylinder with a larger outer diameter in the outer ceramic ring, and the outer ceramic ring is directly mounted on the whole formed by the two inner ceramic rings connected by the protrusions and grooves.

[0006] Patent application 202311683760.2 relates to a method for making and using a reusable stud welding protection ring, which belongs to the field. The present invention designs a composite material protection ring and modifies the stud chuck part of a universal stud welding gun, that is, the protection ring designed by the present invention is fixed on the bottom plate of the welding gun, and the protection ring and the welding gun form an integrated structure. During continuous welding, the assembly method of the protection ring and the welding gun is changed from the traditional installation for each nail to one installation for continuous use, and only the stud needs to be picked up during the welding process.

[0007] At present, there is no fixed porcelain sleeve protection structure on the automatic pulling and nailing machine equipment. The welding auxiliary protection ring used for stud welding is made of ceramic material, the main components of which are magnesium-aluminate and part of aluminum oxide. It cannot be fixed on the welding gun, and the original sheath 3 of the welding gun, such as the attached Figure 3 As shown in the figure, only one end of the metal sleeve is partially grooved, and the welding quality will be unstable and there will be a lot of spatter in the application. The efficiency of the automation system is reduced. In addition, if the existing automatic loading picking, positioning and fixing technology in the existing partial automation stud welding is adopted, the complexity of the system structure will inevitably increase. Utility Model Content

[0008] The technical problem to be solved by the utility model is that in view of the above problems and technical requirements, the utility model proposes a magnetic ring protective cover for the pull welding gun head, which improves the welding quality, has strong air permeability, good protection effect, does not need to be installed and removed every time for use, strengthens the protection of screws, can realize continuous work, and stabilizes the welding quality.

[0009] To this end, the utility model includes: a composite sleeve and a magnetic sleeve. The composite sleeve has an axial through-hole structure in the middle axis portion, and a front inlay is recessed in the middle of the front end face of the composite sleeve. The magnetic sleeve has an axial through-hole structure in the middle axis portion, and the outer wall of the magnetic sleeve is interference fit with the front part of the front inlay, and a flow-equalizing toothed ring is arranged around the front edge of the magnetic sleeve, and protrusions and grooves are evenly spaced around the flow-equalizing toothed ring. The composite sleeve and the magnetic sleeve are coaxially installed, and the magnetic sleeve is integrally embedded in the front inlay of the front end face of the composite sleeve.

[0010] Among them, there is a centripetally reduced inner clamping platform in the middle of the inner wall of the front embedding of the composite sheath; correspondingly, there is a reduced front clamping platform in the middle and rear part of the outer wall of the magnetic sheath. Further, the length from the front clamping platform to the front end face of the magnetic sheath is not greater than the length from the inner clamping platform to the front end face of the composite sheath. At least two air holes are evenly distributed on the outer edge of the front end face of the composite sheath, and gas connecting holes are opened at the corresponding positions of the air holes and the inner wall of the front embedding of the composite sheath. Further, the extension line of the centerline of the gas connecting hole passes through the central axis of the composite sheath 1. Alternatively, the centerline of the gas connecting hole is a tangent or involute of the inner wall of the front embedding. The outer edge of the lower end of the composite sheath 1 is convex to a connecting substrate in the shape of a circular ring, and an edge connection hole is opened on the connecting substrate. Further, a notch-shaped edge notch groove is opened on the local edge of the connecting substrate; further, a pad groove is recessed in an annular manner around the edge connection hole on the connecting substrate; further, an interference groove parallel to the central axis of the composite sheath is opened on the rear outer wall next to the edge connection hole. A ring platform is arranged at the middle part of the outer wall of the composite sheath with a reduced diameter toward the front side.

[0011] The front part of the inner wall of the magnetic sleeve is provided with a mouth, and the average inner diameter of the mouth is larger than the inner diameter of the rear part of the inner wall of the magnetic sleeve; further, the axial middle part of the inner wall of the mouth is smooth and convex in an annular direction.

[0012] Furthermore, in order to achieve the above-mentioned purpose, the present invention is configured as follows:

[0013] In particular, after the composite sheath and the magnetic sheath are coaxially nested and installed, the inner wall of the composite sheath and the inner wall of the rear part of the magnetic sheath are smooth and flush.

[0014] In particular, the inner diameter of the front embedding opening, that is, the outer diameter of the front end edge of the magnetic sleeve, is not greater than 2 / 3 of the outer diameter of the front end surface of the composite sheath.

[0015] In particular, the number of the air holes and the number of the convex tooth-groove structures of the flow-equalizing tooth ring are mutually prime numbers.

[0016] Compared with the prior art, the utility model has the following beneficial effects: the composite sheath and the magnetic sleeve are embedded and installed as one, which can not only ensure the welding quality, reduce environmental pollution, but also improve the automation efficiency. The structure is simple, compact and low in cost, which overcomes the shortcomings of using disposable ceramic protection rings. It can be reused for a long period of time, and the weld surface is uniform and spatter is small during application. It improves the strength and efficiency of stud welding, stabilizes the welding quality effect, simplifies the operation process, and is easy to realize automation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The following drawings are for illustration only and should not be construed as limiting the present invention in any way. By referring to the following drawings, readers can understand the embodiments of the present invention and further understand the advantages and technical features of the present invention.

[0018] Figure 1 This is a schematic diagram of the composite sheath structure in Example 1 of the utility model.

[0019] Figure 2 This is a schematic diagram of the magnetic sleeve structure in Example 1 of the utility model.

[0020] Figure 3 The figure is a schematic diagram of the existing protective cover structure.

[0021] Figure 4 This is a schematic diagram of the structure of the composite sheath embedded in the magnetic sheath in Example 1 of the utility model.

[0022] Reference numerals include:

[0023] 1-composite sheath, 2-magnetic sheath, 3-original sheath;

[0024] 1001-connecting base plate, 1002-connecting sleeve, 1003-ring platform, 1004-front sleeve, 1005-front embedding mouth, 1006-inner clamping platform, 1007-side notch groove, 1008-side connection hole, 1009-interference groove, 1010-gasket groove, 1011-air hole; 2001-bushing sleeve, 2002-front clamping platform, 2003-insertion sleeve, 2004-nozzle, 2005-flow equalizing gear ring.

[0025] Composite sleeve 1, magnetic sleeve 2, original sleeve 3; connecting base plate 1001, connecting sleeve 1002, ring platform 1003, front sleeve 1004, front embedding 1005, inner clamping platform 1006, edge notch groove 1007, edge connection hole 1008, interference groove 1009, gasket groove 1010, air hole 1011; liner 2001, front clamping platform 2002, insert sleeve 2003, nozzle 2004, flow equalizing gear ring 2005. DETAILED DESCRIPTION

[0026] It should be noted that:

[0027] The terms "comprise", "comprises", "having" and any variations thereof are intended to cover other possible options under the same logic that are not listed. For example, a process, method, system, product or apparatus that includes a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units that are not explicitly listed or inherent to these processes, methods, products or apparatus.

[0028] In the description of the present utility model, the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the utility model product is usually placed when in use, and are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", "third" and the like are only used to distinguish the description, and cannot be understood as indicating or implying relative importance. In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0029] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] In order to enable those skilled in the art to better understand the scheme of the utility model, the technical scheme in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is only an embodiment of a part of the utility model, rather than all the embodiments.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by ordinary technicians in the field to which the utility model belongs. When there is a conflict, the definitions in this specification shall prevail.

[0032] The principle of the utility model is to design a composite sheath, which not only improves the overall mechanical strength, but also meets the requirements of insulation and uniform heat dissipation to avoid cracking after welding. When used with a porcelain sleeve, the protective sheath assembly is coordinated with the working structure and function of the welding gun to ensure the stability and safety of the welding process. One-time installation and continuous use support high-efficiency continuous welding, and the stud welding nails are easy to replace and pick up without affecting the continuous operation of the welding gun. Effectively reduce the failure rate and maintenance time of the equipment, thereby improving production efficiency and production quality.

[0033] The utility model comprises: a composite sheath 1 and a magnetic sheath 2.

[0034] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0035] Although the embodiments of the present invention are described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended claims.

[0036] The content of the present invention can be more easily understood by selecting the following preferred implementation methods and embodiments of the present invention. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by ordinary technicians in the field to which the present invention belongs. When there is a conflict, the definition in this specification shall prevail.

[0037] Embodiment 1: As attached Figure 1 As shown, the composite sheath 1 has an axial through hole structure in the middle part, and a front inlay 1005 is recessed in the middle part of the front end surface of the composite sheath 1. Figure 2 As shown, the magnetic sleeve 2 has an axial through hole structure in the middle axis, the outer wall of the magnetic sleeve 2 is interference fit with the front part of the front insert 1005, and a current equalizing toothed ring 2005 is arranged around the front edge of the magnetic sleeve 2, and bumps and grooves are evenly spaced around the current equalizing toothed ring 2005. Figure 4 As shown, the composite sheath 1 and the magnetic sheath 2 are coaxially installed, and the magnetic sheath 2 is integrally embedded in the front embedding opening 1005 on the front end surface of the composite sheath 1 .

[0038] In the above, the inner wall of the front inlay 1005 of the composite sheath 1 has a concentrically reduced inner clamping platform 1006; correspondingly, the middle and rear part of the outer wall of the magnetic sheath 2 has a reduced front clamping platform 2002. Further, the length from the front clamping platform 2002 to the front end face of the magnetic sheath 2 is not greater than the length from the inner clamping platform 1006 to the front end face of the composite sheath 1.

[0039] In the above, at least two air holes 1011 are evenly distributed on the outer edge of the front end surface of the composite sheath 1, and a gas communication hole is opened at a position corresponding to the air hole 1011 and the inner wall of the front insert 1005 of the composite sheath 1. Further, the extension line of the center line of the gas communication hole passes through the central axis of the composite sheath 1. Alternatively, the center line of the gas communication hole is a tangent or an involute of the inner wall of the front insert 1005.

[0040] In the above, the outer edge of the lower end of the composite sheath 1 is convex to form a circular ring-shaped connecting base plate 1001, and an edge connection hole 1008 is opened on the connecting base plate 1001. Further, a notch-shaped edge notch groove 1007 is opened on the local edge of the connecting base plate 1001; further, a pad groove 1010 is recessed in an annular shape around the edge connection hole 1008 on the connecting base plate 1001; further, an interference groove 1009 parallel to the central axis of the composite sheath 1 is opened on the rear outer wall next to the edge connection hole 1008.

[0041] In the above description, a ring platform 1003 is provided at the middle part of the outer wall of the composite sheath 1, which is reduced in diameter toward the front side.

[0042] In the above, there is a mouth 2004 at the front of the inner wall of the magnetic sleeve 2, and the average inner diameter of the mouth 2004 is larger than the inner diameter of the rear of the inner wall of the magnetic sleeve 2; further, the axial middle part of the inner wall of the mouth 2004 is smooth and convex in an annular direction.

[0043] In the embodiment of the utility model, after the composite sheath 1 and the magnetic sheath 2 are coaxially nested, the inner wall of the composite sheath 1 and the rear inner wall of the magnetic sheath 2 are smooth and flush. Moreover, the inner wall and the central axis through hole of the composite sheath 1 and the magnetic sheath 2 after coaxially nesting are just plugged into the studs to be welded.

[0044] Preferably, the inner diameter of the front embedding opening 1005 , i.e., the outer diameter of the front end edge of the magnetic sleeve 2 , is not greater than 2 / 3 of the outer diameter of the front end surface of the composite sheath 1 .

[0045] Preferably, the number of the air holes 1011 and the number of the convex tooth-groove structures of the flow equalizing gear ring 2005 are prime numbers to each other.

[0046] Preferably, in order to ensure that the high-pressure gas input into the composite sheath 1 and the magnetic sheath 2 will not affect the welding melt, an inert gas is selected as the input gas. In this embodiment, nitrogen is selected as the input gas to reduce the cost of use. Other inert gases such as helium (He), neon (Ne), argon (Ar), krypton (Kr), and xenon (Xe) may also be used.

[0047] In the embodiment of the utility model, most of the inert gas sent from the center hole in the welding gun is wrapped around the welding nail, and a small part is first buffered, and then overflows from the air hole 1011 through the groove on the flow-equalizing gear ring 2005 in a steady flow state to evenly wrap the welding nail welding environment, effectively ensuring the stability of the welding process.

[0048] Preferably, the magnetic sleeve 2 can be made of traditional pure ceramic material, or the traditional pure ceramic protective ring can be changed into a composite material, that is, metal tungsten material is used as the outer layer matrix with a thickness of 0.5-1mm, and the original traditional ceramic is inlaid inside. The height of the outer tungsten metal is slightly lower than the height of the internal ceramic ring, exposing the exhaust port at the bottom of the original ceramic ring. Adhesive can be used to fix the two. Tungsten has a higher melting point and a lower thermal expansion coefficient. The two can still be firmly combined together after welding. During the welding process, ceramic ensures insulation and tungsten improves the strength of the protective ring to achieve repeated use.

[0049] The implementation principle of this embodiment is: the magnetic sleeve 2 is embedded in the front inlay 1005 of the front end of the composite sleeve 1, and the connection substrate 1001 is installed on the robot welding machine connection seat through the side connection hole 1008 with the fastening screw, wherein the side notch 1007 just allows the original bolt protrusion structure on the installation surface of the robot welding machine connection seat, and the interference groove 1009 is just convenient for screwing the fastening screw of the side connection hole 1008. At the same time, the composite sleeve 1 itself or the internal inert gas and circuit connection are in place. During operation, the stud welding nail is inserted from the front port of the magnetic sleeve 2 into the inner wall and the central axis through hole of the composite sleeve 1 and the magnetic sleeve 2 after coaxial nesting and installation, and when the welding gun moves to align with the welding point of the workpiece, the arc welding is performed in position.

[0050] The utility model forms a balanced protective atmosphere by arranging air holes 1011 on the outer edge of the top end surface of the composite sheath 1 and correspondingly cooperating with the equalizing tooth ring 2005 on the top end surface of the magnetic sleeve 2 to support the stable environment for controlling the welding point and the molten pool. During welding, high-pressure inert gas can be introduced, and the upward force of the high-pressure airflow is used to offset the gravity of the welding molten liquid, thereby avoiding the falling of the welding molten liquid, solving the welding defects at the end of the welding nail, greatly improving the welding strength of the welding nail, reducing the construction cost, and improving the construction efficiency.

[0051] Based on the above embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention, so as to avoid exhaustively listing all implementation methods that are unnecessary and impossible to list comprehensively.

Claims

1. A magnetic ring protective cover for a welding gun head, comprising a composite cover (1) and a magnetic cover (2); characterized in that: The composite sleeve (1) has an axial through-hole structure at the middle axis, and a front inlay (1005) is recessed in the middle of the front end face of the composite sleeve (1); the magnetic sleeve (2) has an axial through-hole structure at the middle axis, the outer wall of the magnetic sleeve (2) is interference-fitted with the front part of the front inlay (1005), a current-equalizing toothed ring (2005) is arranged around the front edge of the magnetic sleeve (2), and protrusions and grooves are evenly spaced around the current-equalizing toothed ring (2005); the composite sleeve (1) and the magnetic sleeve (2) are coaxially mounted, and the magnetic sleeve (2) is integrally embedded in the front inlay (1005) at the front end face of the composite sleeve (1).

2. The magnetic ring protective cover for the pull welding gun head according to claim 1, characterized in that: The front insert (1005) of the composite sleeve (1) has an inner clamping platform (1006) with a centripetal reduction in diameter in the middle of the inner wall; correspondingly, the outer wall of the magnetic sleeve (2) has a front clamping platform (2002) with a reduction in diameter in the middle and rear part.

3. The magnetic ring protective cover for the pull welding gun head according to claim 1, characterized in that: After the composite sleeve (1) and the magnetic sleeve (2) are coaxially nested and installed, the inner wall of the composite sleeve (1) and the rear inner wall of the magnetic sleeve (2) are smooth and flush.

4. The magnetic ring protective cover for the pull welding gun head according to claim 1, characterized in that: The inner diameter of the front embedding opening (1005), i.e., the outer diameter of the front end edge of the magnetic sleeve (2), is not greater than 2 / 3 of the outer diameter of the front end surface of the composite sheath (1).

5. The magnetic ring protective cover for the pull welding gun head according to claim 1, characterized in that: At least two air holes (1011) are evenly distributed on the outer edge of the front end surface of the composite sheath (1), and gas communication holes are opened at corresponding positions of the air holes (1011) and the inner wall of the front embedding opening (1005) of the composite sheath (1).

6. The magnetic ring protective cover for the pull welding gun head according to claim 1, characterized in that: A ring platform (1003) is arranged at the middle part of the outer wall of the composite jacket (1) with a reduced diameter toward the front side.

7. The magnetic ring protective cover for the pull welding gun head according to claim 1, characterized in that: The outer edge of the lower end of the composite sheath (1) is convex to form a circular ring-shaped connecting base plate (1001), a side connection hole (1008) is opened on the connecting base plate (1001), and a notch-shaped side notch groove (1007) is opened on the local edge of the connecting base plate (1001); A gasket groove (1010) is formed in a circular depression around the edge connection hole (1008) on the (1001); and an interference groove (1009) parallel to the central axis of the composite sheath (1) is formed on the rear outer wall beside the edge connection hole (1008).

8. The magnetic ring protective cover for the pull welding gun head according to claim 2, characterized in that: The length from the front clamping platform (2002) to the front end surface of the magnetic sleeve (2) is no greater than the length from the inner clamping platform (1006) to the front end surface of the composite sleeve (1).

9. The magnetic ring protective cover for the pull welding gun head according to claim 5, characterized in that: An extension line of the center line of the gas communication hole passes through the center axis of the composite jacket (1); or, the center line of the gas communication hole is a tangent line or an involute line of the inner wall of the front insert (1005).

10. The magnetic ring protective cover for the pull welding gun head according to claim 5, characterized in that: The number of the air holes (1011) and the number of the convex tooth-groove structures of the flow-equalizing tooth ring (2005) are mutually prime numbers.

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