Opening circumferential stud welding positioning maintenance tool clamp

Abstract

A split circumferential stud welding positioning maintenance tool clamp comprises a positioning disc (4). A middle hole (43) is formed in the middle of the positioning disc (4), and positioning holes (45) are formed in the edge of the positioning disc (4); and the top surface of the positioning disc (4) partially protrudes upwards from the positioning hole (45) to the middle hole (43). The disc-shaped structure tool can be applied in various methods, welding hole positioning, stud welding strength and perpendicularity detection and reserved connection position testing can be completed, and the disc-shaped structure tool can be fixed on a working face in advance to reinforce an opening edge supporting structure and assist in positioning the accurate stud welding position. The flatness of the metal plate is effectively improved, deformation after welding is reduced and avoided, the strength of the welding stud is conveniently tested, and subsequent normal installation is guaranteed. The tool is convenient for an operator to mount and dismount, is light and handy, is exquisite in design and manufacture, is easy to carry and store, and has the functions of assisting a tool and customizing a detection reference part. The welding efficiency and the welding precision can be improved, and the welding quality problems such as pseudo soldering and crooked nails are reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of brazing arc welding or laser beam processing of IPC classification B23K, and particularly relates to an innovative and improved technology for the structure of auxiliary fixture components for automatic laser welding of studs around the opening of a workpiece. Background Art

[0002] Stud welding is a method of placing one end of the stud in contact with the surface of the plate, energizing the arc, and applying a certain pressure to the stud to complete the welding after the contact surface melts. Stud welding is usually completed using the arc stud welding process.

[0003] The basic principle of arc stud welding is to ignite an arc between the stud to be welded and the workpiece. When the stud and the workpiece are heated to a suitable temperature, the stud is sent into the welding pool on the workpiece under the action of external force to form a welded joint. According to the different welding power sources used in the welding process, traditional arc stud welding can be divided into two basic methods: ordinary arc stud welding and capacitor energy storage arc stud welding.

[0004] Stud welding is a method of welding metal studs or other fasteners to a workpiece. There are many ways to achieve stud welding, such as drawn arc stud welding, energy storage stud welding, resistance welding, projection welding, etc. The corresponding welding machines are also different, namely drawn arc stud welding machine, energy storage stud welding machine, resistance welding machine, projection welding machine, etc. There are many informal names for stud welding machines in China, such as seed welding machine, implant welding machine, seed nail machine, implant nail machine, screw welding machine, screw welding machine, etc., all of which refer to stud welding machines.

[0005] In the prior art, welding studs are often arranged at the edge of the opening of the surface opening workpiece, that is, arc studs need to be welded around the hole. The traditional stud welding positioning is through laser processing and manual punching positioning. Even after the technology is improved, sometimes there are still positioning accuracy defects, resulting in large vertical deviations between the welding studs and the box to be welded, and multiple adjustments are required after welding, and even deformation occurs after welding, resulting in inability to install. This affects welding work efficiency and wastes welding processing time.

[0006] Therefore, auxiliary tooling is often added during on-site operations to facilitate normal work. For example, patent application 202021042765.9 discloses a welding positioning tool for the stud of the fixing bracket of the lower shell of a car, wherein the upper end face of the support rod is welded and fixedly connected with a positioning plate, and the upper end face of the positioning plate is plugged with a left fixing bracket, and a limiting device is plugged into the upper end face of the positioning plate to the right of the left fixing bracket, and a right fixing bracket is connected to the upper end face of the positioning plate to the right of the limiting device, and a limiting device composed of a column, a vertical plate and a limiting block is provided. The vertical plate can be used to place the external connecting rod well, so that the surface of the connecting rod and the external fixing bracket are on the same horizontal line, so as to perform welding well. At the same time, the limiting block can well limit the moving direction of the connecting rod, so that the connecting rod can contact the external fixing bracket well, thereby making welding smoother. Utility Model Content

[0007] The technical problem to be solved by the utility model is that in response to the above problems and technical needs, the utility model proposes an open circumferential stud welding positioning and maintenance tooling fixture, which simply and practically solves the technical problems of inaccurate positioning and poor work efficiency in the prior art, can accurately position, save time and effort, and improve work efficiency.

[0008] To this end, the utility model includes: a positioning plate, a central hole is provided in the middle of the positioning plate, a positioning hole is provided at the edge of the positioning plate, the top surface of the positioning plate is partially convex from the positioning hole to the central hole area, and the inner surface of the positioning hole matches the outer cylindrical surface of the stud.

[0009] Furthermore, in order to achieve the above-mentioned purpose, the present invention is configured as follows:

[0010] Pull bolt installation holes are evenly arranged around the central hole which is partially convex on the top surface of the positioning plate.

[0011] In particular, the positioning disk is a regular polygonal or circular disk structure. The maximum height of the positioning disk is not greater than twice the height of the stud, and the diameter of the inscribed circle of the positioning disk is not less than the diameter of the circumscribed circle of the opening.

[0012] The number and position of the positioning holes correspond to the number and position of the studs to be welded. A standard platform with uniform local thickness is arranged around the positioning holes. Preferably, the height of the standard platform is 1mm-3mm. In particular, there is a protective wall with an arc vertical surface at the outer local edge of the convex part of the top surface of the positioning plate at the rear side of the positioning hole, that is, facing the middle hole.

[0013] The inner wall of the lower part of the middle hole forms an annular wall with an inner diameter larger than the top end of the middle hole. In particular, the diameter of the middle hole or its inscribed circle diameter is not larger than one time of the circumscribed circle diameter of the opening.

[0014] Compared with the prior art, the utility model has the following beneficial effects: the disc-shaped structure tooling in the utility model can be applied in a variety of ways to complete the positioning of welding holes, the detection of stud welding strength and verticality, the reserved connection position test, and the pre-fixation on the work surface to reinforce the support structure of the opening edge, and assist in locating the accurate position of the stud welding. It can effectively improve the flatness of the sheet metal, reduce and avoid deformation after welding, facilitate the testing of the strength of the welding nails, and ensure the subsequent normal installation. It has a simple structure and accurate positioning, can solve the technical problems existing in the prior art, and can achieve the technical effects of accurate positioning, saving time and effort, and improving work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] 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.

[0016] Figure 1 This is a schematic diagram of the circular circumferential stud welding structure in Example 1 of the utility model.

[0017] Figure 2 This is a schematic diagram of the structure of the open circumferential stud welding positioning and maintenance tooling fixture in Example 1 of the utility model.

[0018] Reference numerals include:

[0019] 1—stud, 2—workpiece, 3—opening, 4—positioning plate;

[0020] 41 - boss, 42 - ring wall, 43 - center hole, 44 - bolt installation hole, 45 - positioning hole, 46 - standard platform, 47 - protective wall. DETAILED DESCRIPTION

[0021] It should be noted that:

[0022] 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.

[0023] 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.

[0024] 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.

[0025] 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.

[0026] 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.

[0027] The principle of the utility model is that a central hole 43 is opened in the middle of the positioning plate 4 with a positioning hole 45 corresponding to the welding position of the stud 1 and corresponding to the opening 3 of the workpiece 2 as the basic material, and based on this basic structural condition, a corresponding structure is further designed to expand the application function.

[0028] The utility model comprises a positioning plate 4, a middle hole 43 is formed in the middle of the positioning plate 4, and positioning holes 45 are formed at the edge of the positioning plate 4.

[0029] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0030] 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.

[0031] 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.

[0032] Embodiment 1: As attached Figure 1 As shown, there is an opening 3 on the workpiece 2, and the processing process is to weld a group of studs 1 at predetermined positions on the edge of the opening 3.

[0033] In the foregoing, the number and positions of the positioning holes 45 correspond one-to-one with the number and positions of the studs 1 to be welded.

[0034] In the embodiment of the utility model, as shown in the attached Figure 2 As shown, the top surface of the positioning plate 4 is partially convex from the positioning hole 45 to the middle hole 43. Correspondingly, the inner wall of the lower part of the middle hole 43 forms an annular wall 42 whose inner diameter is larger than the top end of the middle hole 43. This facilitates the placement and removal of the positioning plate 4 on the workpiece 2, and reserves as much space as possible for the workpiece 2 to install components in the opening 3.

[0035] In the above description, bolt mounting holes 44 are evenly formed around the central hole 43 which is partially convex on the top surface of the positioning plate 4 .

[0036] In the embodiment of the utility model, further, in the case where there is a thinner material support structure around the opening 3 on the workpiece 2, for example, the workpiece 2 is a base material with a thickness of less than 1 mm, which is very easy to cause an imprint on the back of the welding point of the stud 1, the positioning plate 4 can be placed at the bottom of the opening 3, and the corresponding positioning holes 45 are aligned one by one with the welding positions of the stud 1 on the workpiece 2 as support. At the same time, according to the regulations, a lower welding current is used to alleviate the impact while meeting the welding strength; or, a pair of positioning plates 4 are used in a relatively snap-fitting form and installed on the front and back sides of the opening 3 on the workpiece 2, and the upper and lower groups of corresponding positioning holes 45 are respectively aligned with the welding positions of the stud 1 on the workpiece 2 to perform the stud welding position, and the corresponding bolts are passed through the corresponding pull bolt installation holes 44 and then tightened with nuts to reinforce the positioning plates 4, so as to reduce and avoid processing deformation caused by welding.

[0037] Furthermore, in order to ensure that the accuracy of the welding studs meets the standard requirements during subsequent installation and avoid interference with other components due to inaccurate positioning or incorrect shape, the scenario of the final connection of the studs 1 can be simulated, that is, in addition to the corresponding protrusions around the pull bolt mounting holes 44, the local structure of the positioning plate 4 is further detailed.

[0038] In the above, a standard platform 46 with uniform local thickness is arranged around the positioning hole 45. The thickness or height of the standard platform 46 is strictly based on the welding process, and the exposed area of ​​the stud root needs to reach a sufficient length during installation.

[0039] In the embodiment of the utility model, of course, correspondingly, after the stud welding is completed, the positioning plate 4 is used to simulate the component to be installed, and the positioning hole 45 is correspondingly inserted into the welded stud to detect the welding position, posture and root welding quality of the stud. If minor defects are found, they can be remedied and corrected, including excessive molten pool and uneven weld surface, etc. This requires that the aperture depth of the positioning hole 45 and the bottom end face must have precise processing quality.

[0040] Preferably, the height of the standard platform 46 is 1mm-3mm. The maximum height of the positioning plate 4 is not greater than twice the height of the stud 1, and the inscribed circle diameter of the positioning plate 4 is not less than the circumscribed circle diameter of the opening 3. Naturally, the diameter of the middle hole 43 or its inscribed circle diameter is not greater than one times the circumscribed circle diameter of the opening 3.

[0041] In addition, the positioning plate 4 is preferably made of tool steel. The material selection of the positioning plate 4 as a positioning tool has an impact on the welding quality. For example, a non-enclosed tool has a greater impact on the arc deviation of welding, and tools of different materials will cause the molten core to shift. When selecting the material of the fixture, it may be more reasonable to use bakelite or nylon because their impact on the arc deviation is relatively small.

[0042] Further, in particular, a protective wall 47 with a circular arc vertical surface is provided on the outer local edge of the local convex part of the top surface of the positioning plate 4 at the rear side of the positioning hole 45, i.e., facing the middle hole 43. The protective wall 47 is provided on the upper end surface of the positioning hole 45, i.e., at the rear side of the standard platform 46, to meet the needs of subsequent stud connection installation environment simulation.

[0043] In the embodiment of the utility model, the positioning plate 4 is a regular polygonal or circular plate-shaped structure, or a special-shaped plate-shaped structure, so as to fit the shape of the opening 3 of the workpiece 2, and also for the convenience of operation and storage.

[0044] In the embodiment of the utility model, the positioning hole 45 is used for inserting and positioning the stud 1. The inner surface of the positioning hole 45 cooperates with the outer cylindrical surface of the stud 1 to prevent the stud 1 from tilting during welding and ensure the verticality between the stud 1 and the surface of the workpiece 2. The positioning holes 45 are arranged evenly or unevenly according to actual needs, and under some special working conditions, the number and position of some positioning holes 45 do not have to correspond one to one with the number and position of the studs 1 to be welded.

[0045] In the embodiment of the utility model, the positioning plate 4 is designed mainly to facilitate the installation and disassembly of the operator, is light and convenient, is exquisitely designed and manufactured, is easy to carry and store, and plays the role of auxiliary tooling and customized detection reference components. It can improve welding efficiency and welding accuracy, and reduce welding quality problems such as false welding and crooked nails.

[0046] In the embodiment of the utility model, the workflow steps of the stud 1 welding include:

[0047] 1) Automatically feed nails to the gun body:

[0048] The stud 1 welding system automatically feeds the stud 1 into the clamping device of the welding gun. This is usually achieved by an automatic nail feeding mechanism, which can accurately push the stud 1 into the welding gun.

[0049] 2) The welding nail contacts the surface of workpiece 2:

[0050] The welding gun moves to the workpiece surface under the guidance of the control system so that the end of the stud 1 contacts the workpiece 2. This step requires precise mechanical control and positioning to ensure that the stud 1 can be accurately placed in the predetermined welding position.

[0051] 3) Welding gun lifting:

[0052] Once stud 1 is in contact with workpiece 2, the welding gun is lifted slightly to ensure that the proper gap is maintained between stud 1 and workpiece 2 during the welding process. This gap is critical to producing a good weld joint.

[0053] 4) Gas protection:

[0054] During welding, the system sprays shielding gas through the welding gun to prevent oxidation of the welding area. Commonly used shielding gases include a mixture of argon and carbon dioxide, which can protect the weld pool from contamination by oxygen and other impurities in the air.

[0055] 5) Check and complete welding:

[0056] When the welding gun, stud 1 and workpiece 2 are ready, the welding power supply will provide enough current to melt the tip of stud 1 and the surface of workpiece 2 to form a strong welded joint. During this process, welding parameters such as current, voltage and welding time will be precisely controlled to ensure welding quality.

[0057] 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. An open circumferential stud welding positioning and maintenance fixture, comprising a positioning plate (4); characterized in that: A central hole (43) is provided in the middle of the positioning plate (4), and a positioning hole (45) is provided at the edge of the positioning plate (4); the top surface of the positioning plate (4) is partially convex in the area from the positioning hole (45) to the central hole (43).

2. The open circumferential stud welding positioning and maintenance fixture according to claim 1 is characterized in that: The inner wall at the lower part of the middle hole (43) forms an annular wall (42) having an inner diameter greater than that of the top end of the middle hole (43).

3. The open circumferential stud welding positioning and maintenance fixture according to claim 1 is characterized in that: Bolt installation holes (44) are evenly arranged around the partially convex middle hole (43) on the top surface of the positioning plate (4).

4. The open circumferential stud welding positioning and maintenance fixture according to claim 1 is characterized in that: A standard platform (46) with uniform local thickness is arranged around the positioning hole (45).

5. The open circumferential stud welding positioning and maintenance fixture according to claim 1 is characterized in that: The maximum height of the positioning plate (4) is no greater than twice the height of the stud (1).

6. The open circumferential stud welding positioning and maintenance fixture according to claim 1 is characterized in that: The inner surface of the positioning hole (45) matches the outer cylindrical surface of the stud (1).

7. The open circumferential stud welding positioning and maintenance fixture according to claim 1 is characterized in that: A protective wall (47) with a circular arc vertical surface is provided at the outer local edge of the local convex part of the top surface of the positioning plate (4) at the rear side of the positioning hole (45), that is, facing the middle hole (43).

8. The open circumferential stud welding positioning and maintenance fixture according to claim 1 is characterized in that: The number and positions of the positioning holes (45) correspond one-to-one to the number and positions of the studs (1) to be welded.

9. The open circumferential stud welding positioning and maintenance fixture according to claim 1, characterized in that: The positioning disk (4) is in the shape of a regular polygon or a circular disk.

10. The open circumferential stud welding positioning and maintenance fixture according to claim 4, characterized in that: The height of the standard stage (46) is 1 mm to 3 mm.

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