Aluminum alloy threaded hole welding device and welding method

Abstract

The present application relates to the field of welding, and provides an aluminum alloy threaded hole welding device and a welding method. The aluminum alloy threaded hole welding device comprises a first positioning member, one end of the first positioning member is formed with a welding backing plate, the end of the welding backing plate away from the first positioning member is formed with a weld forming groove, and the first positioning member is suitable for being arranged in a normal threaded hole to realize positioning of the welding backing plate and the normal threaded hole in the radial direction of the normal threaded hole; a second positioning member, the second positioning member is suitable for being arranged in a threaded hole to be welded and connected to the welding backing plate, and the second positioning member is suitable for cooperating with the welding backing plate to realize positioning of the threaded hole to be welded and the normal threaded hole in the radial direction of the normal threaded hole; wherein the threaded hole to be welded is formed in a first workpiece, and the normal threaded hole is formed in a second workpiece. The aluminum alloy threaded hole welding device can simplify the welding process of the threaded hole to be welded, promote the forming of the weld, and improve the welding quality.

Description

Technical Field

[0001] This invention relates to the field of welding, and provides a welding repair device and method for aluminum alloy threaded holes. Background Technology

[0002] During the maintenance of rail vehicles, the threaded holes on the second workpiece that need to be repaired require welding repair. The current solution is to completely disassemble the second workpiece, then weld the threaded holes, reinstall the second workpiece onto the first workpiece, and then align the repaired threaded holes on the second workpiece with the normal threaded holes on the first workpiece. After determining the correct installation position, the holes are then ground down. For example, the first workpiece could be a side beam or column on the car body, and the second workpiece could be a reinforcing plate or skirt plate on the side beam.

[0003] This welding repair method has at least the following problems: 1. The size positioning of the threaded hole to be welded is complicated and the size error is large; 2. Welding defects are prone to occur during the welding repair of the threaded hole, and the welding repair range is not easy to control; 3. It is difficult to grind the threaded hole after welding repair, and the size of the threaded hole to be welded is not easy to guarantee; 4. The welding repair efficiency is low. Summary of the Invention

[0004] This invention provides an aluminum alloy threaded hole welding repair device to solve the defects of low welding accuracy and poor quality in related technologies, and to improve the welding accuracy of the threaded hole to be repaired.

[0005] This invention also provides a method for welding repair of threaded holes in aluminum alloys.

[0006] A first aspect of the present invention provides an aluminum alloy threaded hole welding repair device, a first positioning member, a welding pad formed at one end of the first positioning member, a weld forming groove formed at the end of the welding pad away from the first positioning member, and the first positioning member being adapted to be inserted into a normal threaded hole to achieve positioning of the welding pad and the normal threaded hole in the radial direction of the normal threaded hole.

[0007] The second positioning element is adapted to pass through the thread hole to be welded and connected to the welding pad. The second positioning element is adapted to cooperate with the welding pad to achieve the positioning of the thread hole to be welded and the normal thread hole in the radial direction of the normal thread hole.

[0008] The threaded hole to be welded is formed on the first workpiece, and the normal threaded hole is formed on the second workpiece.

[0009] According to the first aspect of the present invention, the aluminum alloy threaded hole welding repair device, by positioning the first positioning member with the normal threaded hole and providing a welding backing plate at the end of the first positioning member, can achieve the positioning of the welding backing plate on the first positioning member and the normal threaded hole on the first workpiece in the radial direction of the normal threaded hole. By inserting the second positioning member into the threaded hole to be welded and cooperating with the welding backing plate, the second positioning member can achieve the positioning of the threaded hole to be welded on the second workpiece and the normal threaded hole on the first workpiece in the radial direction of the normal threaded hole. Thus, the positioning of the first workpiece and the second workpiece in the radial direction of the normal threaded hole can be achieved, eliminating the step of frequently calibrating the positioning of the threaded hole to be welded on the first workpiece and the second workpiece in the radial direction of the normal threaded hole during the welding repair of aluminum alloy threaded holes, simplifying the welding repair process and improving the welding repair efficiency. At the same time, by setting the second positioning member and inserting it into the threaded hole to be welded, welding slag can be prevented from entering the threaded hole to be welded, thus protecting the inner wall of the threaded hole to be welded. By setting a weld forming groove on the side of the welding backing plate facing the threaded hole to be welded, it is beneficial to promote the formation of the weld at the end face of the hole facing the welding backing plate, achieving full penetration of the welding heat, avoiding the problem of reduced welding quality due to incomplete penetration of the threaded hole to be welded, improving the welding quality of the threaded hole to be welded and reducing welding defects.

[0010] According to one embodiment of the present invention, the inner ring of the weld forming groove is adapted to the diameter of the hole to be welded and repaired.

[0011] According to one embodiment of the present invention, the depth of the weld forming groove is 1 mm.

[0012] According to one embodiment of the present invention, the welding pad and the second positioning member are adapted to be positioned by a positioning structure.

[0013] According to one embodiment of the present invention, the positioning structure includes a groove formed on the welding pad, wherein one of a positioning post and a positioning hole is formed in the groove, and the other of the positioning post and the positioning hole is formed on the second positioning member.

[0014] According to one embodiment of the present invention, the positioning hole is a square hole, and the shape of the positioning post is adapted to the shape of the positioning hole.

[0015] According to one embodiment of the present invention, the sink is a circular sink, and the diameter of the sink is equal to the outer diameter of the second positioning member.

[0016] According to one embodiment of the present invention, the end of the second positioning member opposite to the welding pad is formed with a handle.

[0017] According to one embodiment of the present invention, the length of the first positioning member is greater than or equal to the distance between the first workpiece and the second workpiece.

[0018] According to one embodiment of the present invention, at least a portion of the first positioning member has a threaded segment formed thereon.

[0019] According to one embodiment of the present invention, the weld forming groove is a circular groove, and the center line of the weld forming groove is coaxially arranged with the central axis of the first positioning member.

[0020] A second aspect of the present invention provides a welding repair method based on the above-described aluminum alloy threaded hole welding repair device, comprising:

[0021] The first positioning member is screwed into the normal threaded hole on the second workpiece, wherein the position of the normal threaded hole on the second workpiece corresponds to the position of the threaded hole to be welded on the first workpiece;

[0022] The first workpiece is overlapped onto the welding pad;

[0023] Insert the second positioning element into the thread hole to be welded;

[0024] The welding repair of the threaded hole to be welded is completed along the circumference of the second positioning member.

[0025] According to the welding repair method provided in the second aspect of the present invention, by using the above-mentioned aluminum alloy threaded hole welding repair device, full penetration of the weld can be effectively achieved and the weld formation quality on the back side of the first positioning member can be guaranteed, thereby promoting weld formation, improving welding quality and reducing welding defects.

[0026] According to one embodiment of the present invention, the step of welding the threaded hole to be repaired includes:

[0027] The welding repair of the threaded hole to be repaired is completed by using an introduction-type arc initiation and an exit-type arc termination method.

[0028] According to one embodiment of the present invention, the step of welding the threaded hole to be repaired includes:

[0029] When the arc swings to one side near the second positioning element, it pauses for a preset duration to allow the weld to form a bottle-mouth weld.

[0030] The above-described one or more technical solutions in the embodiments of the present invention have at least one of the following technical effects:

[0031] According to the first aspect of the present invention, the aluminum alloy threaded hole welding repair device, by positioning the first positioning member with the normal threaded hole and providing a welding backing plate at the end of the first positioning member, can achieve the positioning of the welding backing plate on the first positioning member and the normal threaded hole on the first workpiece in the radial direction of the normal threaded hole. By inserting the second positioning member into the threaded hole to be welded and cooperating with the welding backing plate, the second positioning member can achieve the positioning of the threaded hole to be welded on the second workpiece and the normal threaded hole on the first workpiece in the radial direction of the normal threaded hole. Thus, the positioning of the first workpiece and the second workpiece in the radial direction of the normal threaded hole can be achieved, eliminating the step of frequently calibrating the positioning of the threaded hole to be welded on the first workpiece and the second workpiece in the radial direction of the normal threaded hole during the welding repair of aluminum alloy threaded holes, simplifying the welding repair process and improving the welding repair efficiency. At the same time, by setting the second positioning member and inserting it into the threaded hole to be welded, welding slag can be prevented from entering the threaded hole to be welded, thus protecting the inner wall of the threaded hole to be welded. By setting a weld forming groove on the side of the welding backing plate facing the threaded hole to be welded, it is beneficial to promote the formation of the weld at the end face of the hole facing the welding backing plate, achieving full penetration of the welding heat, avoiding the problem of reduced welding quality due to incomplete penetration of the threaded hole to be welded, improving the welding quality of the threaded hole to be welded and reducing welding defects.

[0032] According to the welding repair method provided in the second aspect of the present invention, by using the above-mentioned aluminum alloy threaded hole welding repair device, full penetration of the weld can be effectively achieved and the weld formation quality on the back side of the first positioning member can be guaranteed, thereby promoting weld formation, improving welding quality and reducing welding defects. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in this invention or related technologies, the accompanying drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0034] Figure 1 This is a schematic structural diagram of the aluminum alloy threaded hole welding repair device provided by the present invention;

[0035] Figure 2 This is a schematic structural diagram of the aluminum alloy threaded hole welding repair device and the first and second workpieces provided by the present invention;

[0036] Figure 3 This is a schematic side view of the aluminum alloy threaded hole welding repair device provided by the present invention, and the first workpiece and the second workpiece;

[0037] Figure 4 These are schematic drawings illustrating the introduction-type arc initiation and the lead-out-type arc termination provided by the present invention;

[0038] Figure 5 This is a schematic flowchart of the welding repair method provided by the present invention.

[0039] Figure label:

[0040] 500, First positioning element; 502, First workpiece; 504, Second workpiece; 506, Welding backing plate; 508, Weld forming groove; 510, Second positioning element; 512, Countersink; 514, Positioning pin; 516, Positioning hole; 518, Handle; 520, Threaded section. Detailed Implementation

[0041] The embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of the invention.

[0042] In the description of the embodiments of the present invention, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of the present invention. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0043] In the description of the embodiments of the present invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of the present invention based on the specific circumstances.

[0044] In embodiments of the present invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0045] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0046] like Figures 1 to 4 As shown, a first aspect of the present invention provides an aluminum alloy threaded hole welding repair device, including a first positioning member 500 and a second positioning member 510; one end of the first positioning member 500 is formed with a welding backing plate 506, and the end of the welding backing plate 506 opposite to the first positioning member 500 is formed with a weld forming groove 508; the first positioning member 500 is adapted to pass through a normal threaded hole to achieve positioning of the welding backing plate 506 and the normal threaded hole in the radial direction of the normal threaded hole; the second positioning member 510 is adapted to pass through the threaded hole to be welded and connected to the welding backing plate 506, and the second positioning member 510 is adapted to cooperate with the welding backing plate 506 to achieve positioning of the threaded hole to be welded and the normal threaded hole in the radial direction of the normal threaded hole; wherein, the threaded hole to be welded is formed in a first workpiece 502, and the normal threaded hole is formed in a second workpiece 504.

[0047] According to the first aspect of the present invention, the aluminum alloy threaded hole welding repair device can achieve the positioning of the welding pad 506 on the first positioning member 500 and the normal threaded hole on the first workpiece 502 in the radial direction of the normal threaded hole by positioning the first positioning member 500 with the normal threaded hole and providing a welding pad 506 at the end of the first positioning member 500. By passing the second positioning member 510 through the threaded hole to be welded and cooperating with the welding pad 506, the second positioning member 510 can achieve the positioning of the threaded hole to be welded on the second workpiece 504 and the normal threaded hole on the first workpiece 502 in the radial direction of the normal threaded hole. Thus, the positioning of the first workpiece 502 and the second workpiece 504 in the radial direction of the normal threaded hole can be achieved, eliminating the step of frequently calibrating the positioning of the threaded hole to be welded on the first workpiece 502 and the second workpiece 504 in the radial direction of the normal threaded hole during the welding repair of aluminum alloy threaded holes, simplifying the welding repair process and improving the welding repair efficiency. Furthermore, the first positioning element 500 and the welding backing plate 506 enable the positioning of the first workpiece 502 and the second workpiece 504 in the axial direction of the normal threaded hole, thus forming a three-dimensional, multi-directional auxiliary device that promotes weld formation, improves welding quality, and reduces welding defects. Simultaneously, by setting the second positioning element 510 and inserting it into the threaded hole to be welded, welding slag can be prevented from entering the threaded hole, thus protecting the inner wall of the hole. By setting a weld forming groove 508 on the side of the welding backing plate 506 facing the threaded hole, weld formation at the end face of the hole facing the welding backing plate 506 is facilitated, achieving full penetration of the welding heat and avoiding the problem of reduced welding quality due to incomplete penetration of the threaded hole, thereby improving the welding quality and reducing welding defects.

[0048] Please continue reading Figures 1 to 4 The aluminum alloy threaded hole welding repair device provided in the first aspect embodiment of the present invention mainly includes a first positioning member 500, a welding backing plate 506, and a second positioning member 510. The first positioning member 500 is used to position the normal threaded holes on the welding backing plate 506 and the second workpiece 504. Specifically, in this embodiment of the present invention, a threaded hole to be welded and a normal threaded hole are respectively provided on the first workpiece 502 and the second workpiece 504, and the threaded hole to be welded and the normal threaded hole on the first workpiece 502 are arranged correspondingly to each other. It can be understood that when there are several threaded holes to be welded and repaired on the first workpiece 502, as long as one of the threaded holes to be welded and repaired is aligned with the normal threaded hole on the second workpiece 504, the other threaded holes to be welded and repaired on the first workpiece 502 can also be aligned with the other normal threaded holes on the second workpiece 504.

[0049] That is, by setting the end of the first positioning member 500 with a welding pad 506 and screwing the first positioning member 500 into the normal threaded hole on the second workpiece 504, the welding pad 506 and the normal threaded hole on the second workpiece 504 can be initially positioned radially along the normal threaded hole by the first positioning member 500. In this embodiment of the invention, the first positioning member 500 can be a positioning pin, a positioning post 514, or a positioning bolt, etc. In other words, by screwing the first positioning member 500 into the normal threaded hole on the second workpiece 504, the initial positioning between the welding pad 506 and the second workpiece 504 can be defined.

[0050] According to one embodiment of the present invention, the length of the first positioning member 500 is greater than or equal to the distance between the first workpiece 502 and the second workpiece 504.

[0051] like Figure 2 As shown, in this embodiment of the invention, the length of the first positioning member 500 needs to be set to be greater than the distance between the first workpiece 502 and the second workpiece 504. This is to ensure that the first positioning member 500 can support the welding backing plate 506 on the first workpiece 502, so that the welding backing plate 506 can fit tightly against the end face of the threaded hole to be welded on the first workpiece 502. Simultaneously, this setting also ensures that the first positioning member 500 can be inserted into the normal threaded hole on the second workpiece 504 to achieve preliminary axial positioning between the first workpiece 502 and the second workpiece 504.

[0052] Of course, in some other embodiments, the first positioning member 500 can also be set to be equal to the distance between the first workpiece 502 and the second workpiece 504, so that the positioning member 500 can also position the first workpiece 502 and the second workpiece 504.

[0053] According to one embodiment of the present invention, at least a portion of the first positioning member 500 has a threaded segment 520 formed thereon.

[0054] As mentioned earlier, the first positioning element 500 can be a positioning bolt, and correspondingly, a threaded section 520 adapted to a normal threaded hole is formed on a portion of the first positioning element 500. Figure 1 As shown, in this embodiment of the invention, the threaded segment 520 can be formed at the end of the first positioning member 500 and spiral upwards a certain distance. With this arrangement, the stable connection between the welding pad 506 and the second workpiece 504 can be improved through the engagement of the threaded segment 520 with the normal threaded hole.

[0055] In this embodiment of the invention, in order to achieve the positioning accuracy of the first workpiece 502 and the second workpiece 504 along the axial direction of the normal threaded hole, corresponding calibration points can be set on the first positioning member 500. For example, corresponding scale points can be set on the first positioning member 500. When the first positioning member 500 is screwed in until the scale point is flush with the end face of the normal threaded hole of the first workpiece 502, it means that the first workpiece 502 and the second workpiece 504 have reached the preset distance value.

[0056] The welding backing plate 506 is used to support the first workpiece 502. At the same time, a weld forming groove 508 is formed on the welding backing plate 506. The weld forming groove 508 corresponds to the threaded hole to be welded. This setting not only further improves the positioning accuracy of the first workpiece 502 and the second workpiece 504, but also enables the weld of the threaded hole to be welded on the first workpiece 502 to achieve full penetration and ensures the weld forming quality on the back of the first positioning part 500. That is, by opening the weld forming groove 508 on the welding backing plate 506, a certain gap is formed between the welding backing plate 506 and the end face of the threaded hole to be welded. In this way, when welding the threaded hole to be welded, the existence of the above gap is more conducive to the sinking of welding heat, realizing the weld penetration of the first workpiece 502 in the workpiece thickness direction, thereby effectively ensuring the welding quality during the welding process.

[0057] According to one embodiment of the present invention, the inner ring of the weld forming groove 508 is adapted to the diameter of the threaded hole to be welded.

[0058] It is understandable that, in order to avoid the weld forming groove 508 affecting the structural strength of the welding backing plate 506, and to avoid forming a large weld on the side of the threaded hole to be welded facing the welding backing plate 506, in this embodiment of the invention, the inner diameter of the weld forming groove 508 is the same as the diameter of the threaded hole to be welded, thereby achieving the above objectives.

[0059] Of course, in some other embodiments, the inner diameter of the weld forming groove 508 can be set to be slightly larger than the diameter of the threaded hole to be welded. It should be noted that, since the welding of the threaded hole to be welded requires ensuring full fusion and forming at the root of the weld, if the inner diameter of the weld forming groove 508 is too large, it will be detrimental to the weld forming at the end face of the hole facing the welding pad 506.

[0060] In this embodiment of the invention, the depth of the weld forming groove 508 is 1 mm. By setting the depth of the weld forming groove 508 to 1 mm, not only can heat deposition be ensured during the welding process of the threaded hole to be repaired, so that the welding heat can achieve melting penetration in the thickness direction of the first workpiece 502, but also a large weld bead can be avoided on the side of the threaded hole to be repaired facing the welding pad 506, which would complicate the grinding process.

[0061] In this embodiment of the invention, the weld forming groove 508 is a circular groove, and the center line of the weld forming groove 508 is coaxially arranged with the central axis of the first positioning member 500.

[0062] With this configuration, it can be ensured that when the first positioning element 500 is screwed into the normal threaded hole on the second workpiece 504, the weld forming groove 508 can also achieve precise positioning with the normal threaded hole in the radial direction of the normal threaded hole.

[0063] The second positioning element 510 serves two purposes: firstly, it further positions the welding pad 506 and the normal threaded hole in the radial direction of the normal threaded hole; secondly, it prevents impurities such as welding slag from entering the welding hole. In other words, in this embodiment of the invention, by inserting the second positioning element 510 into the welding hole and positioning it to fit the welding pad 506, the positioning of the welding hole and the welding pad 506 in the radial direction of the normal threaded hole can be guaranteed. Since the welding pad 506 and the normal threaded hole on the second workpiece 504 have already been positioned in the radial direction of the normal threaded hole by the first positioning element 500, the second positioning element 510 can also achieve the same positioning.

[0064] like Figure 1 As shown, in this embodiment of the invention, the second positioning member 510 is detachably connected to the welding pad 506. It should be noted that the detachable connection between the second positioning member 510 and the welding pad 506 mentioned herein can use various different forms such as plug-in connection, threaded connection, and snap-fit ​​connection.

[0065] In this embodiment of the invention, the second positioning member 510 is generally columnar in shape, that is, the shape of the second positioning member 510 is adapted to the shape of the threaded hole to be welded.

[0066] According to one embodiment of the present invention, the welding pad 506 and the second positioning member 510 are adapted to be positioned by a positioning structure.

[0067] like Figure 1 As shown, in this embodiment of the invention, the second positioning member 510 and the welding pad 506 can be positioned and connected by a positioning structure.

[0068] The positioning structure can take at least the following different forms:

[0069] Positioning Structure 1:

[0070] A groove 512 adapted to the second positioning member 510 is provided on the welding pad 506. The second positioning member 510 can be directly inserted into the groove 512 to complete the positioning of the second positioning member 510 and the welding pad 506.

[0071] Positioning Structure Two:

[0072] Based on the positioning structure one, a positioning groove is opened on the side wall of the sink 512, and a positioning protrusion that cooperates with the positioning groove is set on the outer peripheral wall of the second positioning member 510. When the positioning protrusion cooperates with the positioning groove, it can not only restrict the positioning of the welding pad 506 and the second positioning member 510 in the axial direction, but also restrict the rotational freedom of the welding pad 506 and the second positioning member 510 along the axial direction of the second positioning member 510.

[0073] Positioning Structure Three:

[0074] A positioning groove is provided on the welding pad 506, and a positioning protrusion that is compatible with the positioning groove is formed at the end of the second positioning member 510. The positioning of the second positioning member 510 and the welding pad 506 can be completed by inserting the positioning protrusion into the positioning groove.

[0075] Of course, in other embodiments, the positioning of the second positioning member 510 and the welding pad 506 can also be achieved by other forms of positioning structures, which will not be listed here.

[0076] According to one embodiment of the present invention, the positioning structure includes a groove 512 formed on the welding pad 506, one of the positioning post 514 and the positioning hole 516 is formed in the groove 512, and the other of the positioning post 514 and the positioning hole 516 is formed on the second positioning member 510.

[0077] like Figure 1 As shown above, in order to further improve the positioning of the second positioning member 510 and the welding pad 506, a positioning hole 516 is formed in the sink 512, and a positioning post 514 that is adapted to be inserted into the positioning hole 516 is formed at the end of the second positioning member 510.

[0078] In this embodiment of the invention, the positioning hole 516 is a square hole, and correspondingly, the positioning post 514 is also a square post. This arrangement also facilitates the prevention of axial rotation of the second positioning member 510 relative to the welding pad 506 during the actual installation of the second positioning member 510.

[0079] It should be noted that in this embodiment of the invention, the threaded hole to be welded is an aluminum alloy threaded hole, and the second positioning part 510 is made of stainless steel. Therefore, during the welding process of the threaded hole to be welded, the second positioning part 510 will not be welded to the first workpiece 502.

[0080] In this embodiment of the invention, the recess 512 is a circular groove, and the diameter of the recess 512 is equal to the outer diameter of the second positioning member 510. This configuration ensures precise positioning of the second positioning member 510 within the recess 512 after insertion.

[0081] According to one embodiment of the present invention, a handle 518 is formed at the end of the second positioning member 510 opposite to the welding pad 506.

[0082] As mentioned above, to facilitate the operation of the second positioning member 510, a handle 518 is rotatably connected to the end of the second positioning member 510 facing away from the welding pad 506. Operating the handle 518 improves the ease of rotating the second positioning member 510.

[0083] The following describes the method of using the aluminum alloy threaded hole welding repair device provided in the embodiments of the present invention:

[0084] First, screw the first positioning part 500 into the normal threaded hole on the second workpiece 504 and screw it in a certain length;

[0085] Secondly, the first workpiece 502 is placed on the welding pad 506, thereby enabling the welding pad 506 and the normal threaded hole on the second workpiece 504 to be positioned in the radial direction of the normal threaded hole.

[0086] Next, the second positioning element 510 is inserted into the threaded hole to be welded and the positioning pin 514 on the second positioning element 510 is inserted into the positioning hole 516 in the groove 512 on the welding pad 506. In this way, the positioning of the threaded hole to be welded and the normal threaded hole along the radial direction of the normal threaded hole can be guaranteed.

[0087] Next, weld around the circumference of the second positioning part 510 to be welded threaded hole. After the welding is completed and the weld is allowed to cool, pull the second positioning part 510 out of the threaded hole to be welded and grind the weld smooth.

[0088] Finally, remove the first positioning part 500 from the normal threaded hole, and then connect the first workpiece 502 and the second workpiece 504 through the threaded connector.

[0089] like Figure 5 As shown, a second aspect of the present invention provides a welding repair method based on the above-described aluminum alloy threaded hole welding repair device, comprising:

[0090] Step 100: Screw the first positioning part 500 into the normal threaded hole on the second workpiece 504, wherein the position of the normal threaded hole on the second workpiece 504 corresponds to the position of the threaded hole to be welded on the first workpiece 502.

[0091] Step 200: The first workpiece 502 is overlapped onto the welding pad 506;

[0092] Step 300: Insert the second positioning part 510 into the thread hole to be welded;

[0093] Step 400: Complete the welding repair of the threaded hole to be repaired along the circumference of the second positioning member 510.

[0094] According to the welding repair method provided in the second aspect of the present invention, by using the above-mentioned aluminum alloy threaded hole welding repair device, full penetration of the weld can be effectively achieved and the weld formation quality on the back side of the first positioning member 500 can be guaranteed, thereby promoting weld formation, improving welding quality and reducing welding defects.

[0095] In step 100, the first positioning member 500 is screwed into the normal threaded hole on the second workpiece 504. When it is screwed into place, it ensures that when the first workpiece 502 is attached to the welding pad 506, the distance between the first workpiece 502 and the second workpiece 504 meets the standard. The distance between the first workpiece 502 and the second workpiece 504 mentioned here is the distance between the workpiece 502 and the second workpiece 504 along the axial direction of the normal threaded hole. At the same time, due to the presence of the welding pad 506, the positioning of the welding pad 506 and the normal threaded hole in the radial direction of the normal threaded hole can also be satisfied.

[0096] At the same time, at least two first positioning elements 500 can be screwed into two different normal threaded holes on the second workpiece 504, thereby ensuring the pre-positioning of the welding backing plate 506 and the normal threaded holes.

[0097] In step 200, the first workpiece 502 is overlapped on the welding pad 506. At this time, the distance between the first workpiece 502 and the second workpiece 504 is sufficient to ensure that they are installed in place. At the same time, in this step, the first workpiece 502 and the welding pad 506 need to be tightly attached.

[0098] In step 300, the second positioning member 510 is inserted into the threaded hole to be welded and the second positioning member 510 is aligned with the groove 512 on the welding pad 506. Since the welding pad 506 and the first positioning member 500 are coaxially arranged, the second positioning member 510 can be coaxially arranged with both the welding pad 506 and the first positioning member 500. Correspondingly, the second positioning member 510 can also ensure that the threaded hole to be welded on the first workpiece 502 is aligned with the normal threaded hole on the second workpiece 504.

[0099] Furthermore, in this step, other second positioning elements 510 can be screwed into the normal threaded holes on the first workpiece 502, and these second positioning elements 510 can be aligned with the countersunk grooves 512 on the corresponding welding backing plate 506. This ensures accurate positioning of the threaded holes to be welded on the first workpiece 502 and the normal threaded holes on the second workpiece 504 in the radial direction of the normal threaded holes. In other words, this step ensures accurate positioning of the first workpiece 502 and the second workpiece 504, thereby eliminating the need for repeated positioning steps for the first workpiece 502 and the second workpiece 504 in the prior art, and improving the positioning accuracy of the first workpiece 502 and the second workpiece 504.

[0100] At the same time, it should be noted that in this step, the weld forming groove 508 needs to be aligned with the threaded hole to be welded in order to achieve the positioning of the threaded hole to be welded and the normal threaded hole in the radial direction of the normal threaded hole.

[0101] In step 400, the welding of the threaded hole to be welded can be completed around the second positioning member 510 in the circumferential direction.

[0102] According to one embodiment of the present invention, the steps for welding a threaded hole to be repaired include:

[0103] Step 410: The threaded hole to be repaired is repaired by using an introduction-type arc initiation and an exit-type arc termination method.

[0104] like Figure 4 As shown, the line segment starting with the dot and the line segment indicated by the arrow represent the lead-in arc initiation and lead-out arc termination welding paths. Figure 4 The arc-shaped path in the diagram represents the specific welding path.

[0105] In step 410, the welding process employs an arc-initiating and arc-exiting operation method. This method can solve the problems of incomplete fusion and porosity defects that occur during aluminum alloy welding.

[0106] According to one embodiment of the present invention, the steps for welding a threaded hole to be repaired include:

[0107] Step 420: When the arc swings to one side near the second positioning element 510, pause for a preset duration to allow the weld to form a bottle-shaped weld. The preset duration mentioned here can be 0.5 seconds.

[0108] In step 420, a 360-degree elliptical one-time forming welding operation method is adopted. During welding, the trajectory of the welding arc is an oblique ellipse, and welding is performed 360 degrees along the circumference of the second positioning part 510. When the arc swings to the side close to the second positioning part 510, it pauses for 0.5 seconds to make the weld form a bottle mouth shape, which can ensure the effective thickness of the weld at the edge of the hole and reduce the probability of welding defects.

[0109] After welding is completed and the weld has cooled to room temperature, the second positioning element 510 is removed from the welding backing plate 506. Finally, the weld surface is ground smooth, and the welding repair is completed. It should be noted that the first workpiece 502 and the second workpiece 504 are made of aluminum alloy, while the second positioning element 510 and the welding backing plate 506 are both made of stainless steel. Therefore, when welding along the circumference of the second positioning element 510, it will not cause the second positioning element 510 to be welded together with the first workpiece 502, thus enabling quick disassembly of the second positioning element 510.

[0110] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A welding repair device for aluminum alloy threaded holes, characterized in that, include: A first positioning element (500) has a welding pad (506) formed at one end of the first positioning element (500), and a weld forming groove (508) is formed at the end of the welding pad (506) opposite to the first positioning element (500). The first positioning element (500) is adapted to be inserted into a normal threaded hole to achieve the positioning of the welding pad (506) and the normal threaded hole in the radial direction of the normal threaded hole. The second positioning element (510) is adapted to be inserted into the thread hole to be welded and connected to the welding pad (506). The second positioning element (510) is adapted to cooperate with the welding pad (506) to achieve the positioning of the thread hole to be welded and the normal thread hole in the radial direction of the normal thread hole. The threaded hole to be welded is formed in the first workpiece (502), and the normal threaded hole is formed in the second workpiece (504).

2. The aluminum alloy threaded hole welding repair device according to claim 1, characterized in that, The inner ring of the weld forming groove (508) is adapted to the diameter of the hole to be welded and repaired.

3. The aluminum alloy threaded hole welding repair device according to claim 1, characterized in that, The depth of the weld forming groove (508) is 1 mm to 2 mm.

4. The aluminum alloy threaded hole welding repair device according to claim 1, characterized in that, The welding pad (506) and the second positioning member (510) are adapted to be positioned by a positioning structure.

5. The aluminum alloy threaded hole welding repair device according to claim 4, characterized in that, The positioning structure includes a groove (512) formed on the welding pad (506), in which one of a positioning post (514) and a positioning hole (516) is formed, and the other of the positioning post (514) and the positioning hole (516) is formed on the second positioning member (510).

6. The aluminum alloy threaded hole welding repair device according to claim 5, characterized in that, The positioning hole (516) is a square hole, and the shape of the positioning post (514) is adapted to the shape of the positioning hole (516).

7. The aluminum alloy threaded hole welding repair device according to claim 5, characterized in that, The sink (512) is a circular sink, and the diameter of the sink (512) is equal to the outer diameter of the second positioning member (510).

8. The aluminum alloy threaded hole welding repair device according to any one of claims 1 to 7, characterized in that, The second positioning member (510) has a handle (518) formed at the end opposite to the welding pad (506).

9. The aluminum alloy threaded hole welding repair device according to any one of claims 1 to 7, characterized in that, The length of the first positioning element (500) is greater than or equal to the distance between the first workpiece (502) and the second workpiece (504).

10. The aluminum alloy threaded hole welding repair device according to any one of claims 1 to 7, characterized in that, At least a portion of the first positioning member (500) has a threaded segment (520).

11. The aluminum alloy threaded hole welding repair device according to any one of claims 1 to 7, characterized in that, The weld forming groove (508) is a circular groove, and the center line of the weld forming groove (508) is coaxially arranged with the central axis of the first positioning member (500).

12. A welding repair method based on the aluminum alloy threaded hole welding repair device as described in any one of claims 1 to 11, characterized in that, include: The first positioning member (500) is screwed into the normal threaded hole on the second workpiece (504), wherein the position of the normal threaded hole on the second workpiece (504) corresponds to the position of the threaded hole to be welded on the first workpiece (502); The first workpiece (502) is overlapped onto the welding pad (506); Insert the second positioning element (510) into the thread hole to be welded; The welding repair of the threaded hole to be welded is completed along the circumference of the second positioning member (510).

13. The welding repair method according to claim 12, characterized in that, The welding repair step for the threaded hole to be repaired includes: The welding repair of the threaded hole to be repaired is completed by using an introduction-type arc initiation and an exit-type arc termination method.

14. The welding repair method according to claim 12, characterized in that, The welding repair step for the threaded hole to be repaired includes: When the arc swings to the side near the second positioning element (510), it pauses for a preset duration to form a bottle-mouth weld.

Images