Metal piece with thread repairing structure and repairing method of threaded hole of metal piece

Abstract

The invention relates to a metal piece with a thread repairing structure and a repairing method of a threaded hole of the metal piece, the metal piece comprises a first connecting piece, a first via hole is formed in the first connecting piece, the thread repairing structure comprises an auxiliary connecting piece, a threaded hole is formed in the auxiliary connecting piece, and the auxiliary connecting piece is embedded in the first connecting piece; and the threaded hole and the first via hole are communicated and are coaxially arranged. An auxiliary connecting piece is designed, a threaded hole is formed in the auxiliary connecting piece, the auxiliary connecting piece is embedded in a first connecting piece, a hole, used for being connected with other parts, in the first connecting piece is a connecting hole, a first via hole is a hole obtained after the connecting hole is damaged, and the hole positions of the two holes are consistent; the auxiliary connecting piece is provided with the threaded hole, the first via hole in the first connecting piece can serve as a connecting hole to be repaired, the threaded hole and the first via hole are communicated and coaxially arranged, the threaded hole in the auxiliary connecting piece can serve as a repaired connecting hole, and repairing of the connecting hole to be repaired is completed.

Description

Technical Field

[0001] The present disclosure relates to the technical field of mechanical processing, and in particular, to a metal part with a thread repair structure and a method for repairing a threaded hole of the metal part. Background Art

[0002] In the prior art, threaded connections are widely used in various scenarios due to their simple structure, low cost, easy manufacturing and disassembly, and multiple reuse characteristics. However, due to continuous load, vibration, frequent disassembly, or improper tightening and local stress due to accidental factors, the state of the thread is inevitably damaged, resulting in thread failure, broken threads, disengagement, and tangled threads. Therefore, it is necessary to repair the damaged thread position. Summary of the invention

[0003] The purpose of the present disclosure is to provide a metal part with a thread repair structure and a method for repairing a threaded hole of the metal part, so as to at least partially solve the technical problems existing in the related art.

[0004] In order to achieve the above-mentioned object, the present application provides a metal part with a thread repair structure, comprising: A first connecting member, wherein a first via hole is provided on the first connecting member; The thread repair structure comprises an auxiliary connecting piece, wherein the auxiliary connecting piece is provided with a threaded hole, and the auxiliary connecting piece is embedded in the first connecting piece, and the threaded hole is communicated with the first through hole and is coaxially arranged.

[0005] Optionally, the metal member further includes a second connecting member and a connecting screw. The second connecting member is provided with a second via hole; The connecting screw is passed through the second through hole and the first through hole and is threadedly connected to the threaded hole, so that the first connecting member and the second connecting member are connected.

[0006] Optionally, a mounting groove is provided on the first connecting member, and the auxiliary connecting member is fixedly installed in the mounting groove.

[0007] Optionally, the auxiliary connecting member includes a connecting plate and a threaded sleeve, the threaded hole is defined inside the threaded sleeve, the connecting plate is embedded in the mounting groove, and the threaded sleeve is inserted in the first through hole.

[0008] Optionally, the number of the first via holes is plural, the number of the second via holes is plural corresponding to the number of the first via holes, and the number of the threaded holes is plural corresponding to the number of the first via holes.

[0009] Optionally, a diameter of the first via hole is consistent with a diameter of the second via hole, and a diameter of the threaded hole is smaller than the diameter of the first via hole.

[0010] Optionally, the auxiliary connecting member is made of steel.

[0011] Optionally, the strength of the material of the auxiliary connecting member is higher than the strength of the material of the first connecting member.

[0012] According to a second aspect of the present disclosure, a method for repairing a threaded hole of a metal part is provided, wherein the metal part to be repaired comprises a first connecting member, a connecting hole to be repaired is provided on the first connecting member, the first connecting member comprises a first surface and a second surface arranged opposite to each other, and a first end of the connecting hole to be repaired extends to the first surface; The method includes: A mounting groove is provided on the second surface at a position corresponding to the second end of the connecting hole to be repaired; Providing an auxiliary connecting piece, wherein the auxiliary connecting piece is provided with a threaded hole; The auxiliary connecting piece is embedded in the installation groove, and the threaded hole is connected with the connecting hole to be repaired and arranged coaxially.

[0013] Optionally, the strength of the material of the auxiliary connecting member is higher than the strength of the material of the first connecting member, and embedding the auxiliary connecting member in the installation groove comprises: The auxiliary connecting piece is embedded in the installation groove by means of interference fit.

[0014] Through the above technical solution, an auxiliary connecting piece is designed, and a threaded hole is set on the auxiliary connecting piece. Since the auxiliary connecting piece is embedded in the first connecting piece, the first through hole on the first connecting piece serves as the threaded hole to be repaired. The threaded hole and the first through hole are connected and coaxially arranged. The threaded hole on the auxiliary connecting piece can be used as the repaired threaded hole, thereby completing the repair of the threaded hole to be repaired.

[0015] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present disclosure but do not constitute a limitation of the present disclosure. In the accompanying drawings: Figure 1 is a perspective schematic diagram of a metal part with a thread repair structure in a decomposed state provided by an exemplary embodiment of the present disclosure; Figure 2is a three-dimensional schematic diagram of a metal part with a thread repair structure in an assembled state provided by an exemplary embodiment of the present disclosure; Figure 3 is a perspective schematic diagram of a second connecting member provided by an exemplary embodiment of the present disclosure; Figure 4 is a perspective schematic diagram of a portion of a first connecting member provided by an exemplary embodiment of the present disclosure; Figure 5 is a three-dimensional schematic diagram of a metal part with a thread repair structure in an assembled state provided by an exemplary embodiment of the present disclosure, wherein only a part of the first connecting part and the auxiliary connecting part are shown; Figure 6 It is a flowchart of a repair method provided by an exemplary embodiment of the present disclosure.

[0017] Description of Reference Numerals 100. Metal part, 11. First connecting part, 111. First through hole, 112. Mounting groove, 12. Second connecting part, 121. Second through hole, 13. Connecting screw, 20. Auxiliary connecting part, 21. Threaded hole, 22. Connecting plate, 23. Threaded sleeve. DETAILED DESCRIPTION

[0018] The specific embodiments of the present disclosure are described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present disclosure, and are not used to limit the present disclosure.

[0019] In the description of the present disclosure, it is necessary to understand that the terms "upper", "lower", "inside" and "outside" etc. indicating orientation or positional relationships are defined based on the drawing directions shown in the accompanying drawings, and are only for the convenience of describing the present disclosure and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, and a specific orientation structure and operation, and therefore cannot be understood as a limitation on the present disclosure.

[0020] In the present disclosure, it should be noted that the terms used, such as "first", "second", etc., are used to distinguish one element from another element, and do not have order and importance. In addition, in the description with reference to the drawings, the same number in different drawings represents the same element.

[0021] In the description of the present disclosure, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "connect", "connected", and "installed" 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 directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present disclosure can be understood according to specific circumstances.

[0022] like Figures 1 to 5 As shown, the present application provides a metal part 100 with a threaded repair structure, including a first connecting part 11, on which a first through hole 111 is arranged, and the threaded repair structure includes an auxiliary connecting part 20, on which a threaded hole 21 is arranged, and the auxiliary connecting part 20 is embedded in the first connecting part 11, and the threaded hole 21 is connected to the first through hole 111 and is coaxially arranged.

[0023] Through the above technical solution, an auxiliary connecting member 20 is designed, and a threaded hole 21 is set on the auxiliary connecting member 20. Since the auxiliary connecting member 20 is embedded in the first connecting member 11, the hole on the first connecting member 11 for connecting with other components is called a connecting hole, and the first through hole 111 is a hole after the connecting hole is damaged (or after expansion). The positions of the two holes are consistent, which is equivalent to the first through hole 111 on the first connecting member 11 can be used as the connecting hole to be repaired. The threaded hole 21 is connected to the first through hole 111 and is coaxially arranged, so the threaded hole 21 on the auxiliary connecting member 20 can be used as the repaired connecting hole, that is, the repair of the connecting hole to be repaired is completed.

[0024] In the present disclosure, the position of the first through hole 111 on the first connecting member 11 is the position of the thread that needs to be repaired, and a threaded hole 21 is set on the auxiliary connecting member 20. The inner wall of the threaded hole 21 has a complete thread, and the threaded hole 21 coincides with the axis of the first through hole 111. When the first through hole 111 needs to be connected with a threaded connector (such as a screw or a bolt), its threaded connector can be connected to the threaded hole 21 on the auxiliary connecting member 20. Since the auxiliary connecting member 20 is embedded in the first connecting member 11, when the threaded connector is connected to the threaded hole 21, it is equivalent to being connected to the first through hole 111, that is, it is equivalent to being connected to the first connecting member 11, and since the threaded hole 21 coincides with the axis of the first through hole 111, the connection position can be guaranteed to be correct, and skewness during connection can be avoided.

[0025] In the present disclosure, the interior of the first via hole 111 can be a threaded inner wall or a smooth inner wall. Since the threaded hole 21 on the auxiliary connector 20 can be used for the connection between the first connector 11 and the threaded connector, the present disclosure does not limit the structure of the inner wall of the first via hole 111.

[0026] In this disclosure, Figure 1 As shown, the metal member 100 may further include a second connecting member 12 and a connecting screw 13. The second connecting member 12 is provided with a second through hole 121. The connecting screw 13 is passed through the second through hole 121 and the first through hole 111 and is threadedly connected to the threaded hole 21, so as to connect the first connecting member 11 and the second connecting member 12. In this way, the connection between the second connecting member 12 and the first connecting member 11 is facilitated.

[0027] For example, the interior of the connecting hole on the original first connecting member 11 is a threaded inner wall, and the threaded inner wall has intact threads, the second through hole 121 can be a threaded hole or a through hole with a smooth inner wall, and the connecting screw 13 is threadedly connected with the first through hole 111 after passing through the second through hole 121, so that the first connecting member 11 and the second connecting member 12 can be locked. In the present disclosure, if the inner wall thread of the connecting hole on the first connecting member 11 is damaged, a threaded hole 21 is provided to replace the damaged hole to connect the above-mentioned connecting screw 13, and the connecting screw 13 passes through the second through hole 121 and the first through hole 111, and is connected to the threaded hole 21, completing the connection between the first connecting member 11 and the second connecting member 12, and the threaded hole 21 replaces the damaged connecting hole, that is, the repair of the connecting hole is completed.

[0028] In this disclosure, Figure 4 As shown, the first connecting member 11 may be provided with a mounting groove 112, and the auxiliary connecting member 20 is fixedly mounted in the mounting groove 112. Such a configuration facilitates the connection of the auxiliary connecting member 20 and makes the connection between the first connecting member 11 and the auxiliary connecting member 20 more stable.

[0029] In the present disclosure, an installation groove 112 is provided to install the auxiliary connecting member 20, which can not only locate the position of the auxiliary connecting member 20 when installing the auxiliary connecting member 20, but also make the connection surface between the auxiliary connecting member 20 and the first connecting member 11 larger, thereby making the connection between the auxiliary connecting member 20 and the first connecting member 11 more secure.

[0030] In this disclosure, Figure 5 As shown, the auxiliary connecting member 20 may include a connecting plate 22 and a threaded sleeve 23, the threaded sleeve 23 defines a threaded hole 21 inside, the connecting plate 22 is embedded in the mounting groove 112, and the threaded sleeve 23 is inserted in the first through hole 111. In this way, it is also convenient to make the axis between the threaded hole 21 and the first through hole 111 coincide, and at the same time, the threaded section of the threaded hole 21 can be lengthened, so that the repaired connecting hole is more secure.

[0031] For example, the first end of the threaded sleeve 23 is connected to the connecting plate 22, and the second end of the threaded sleeve 23 extends to an end face of the first through hole 111 away from the connecting plate 22, which is equivalent to the outer wall of the threaded sleeve 23 passing through the entire inner wall of the first through hole 111. The inner wall of the threaded sleeve 23 is fully threaded, which can effectively extend the threaded section of the threaded hole 21, making it more stable when connected to the threaded connector and having a longer service life.

[0032] In some embodiments, the inner diameter of the first through hole 111 and the outer diameter of the threaded sleeve 23 are set to be consistent in size, which can ensure that the connection between the two is more stable.

[0033] In the present disclosure, there is no limitation on the length of the threaded sleeve 23 , as long as sufficient strength of the threaded connection can be achieved.

[0034] In some embodiments, the connecting plate 22 may be provided with a through hole connected to the interior of the threaded sleeve 23 to form a through threaded hole 21. Alternatively, the connecting plate 22 may be provided with a blind hole, the opening end of which is connected to the interior of the threaded sleeve 23 to form a non-through threaded hole 21.

[0035] In this disclosure, Figure 1 As shown, the number of first via holes 111 can be multiple, the number of second via holes 121 corresponding to the number of first via holes 111 is multiple, and the number of threaded holes 21 corresponding to the number of first via holes 111 is multiple. In this way, multiple connection holes to be repaired can be repaired at the same time.

[0036] Since the auxiliary connecting member 20 can be provided with a plurality of threaded holes 21 at the same time, the plurality of threaded holes 21 can simultaneously repair a plurality of connecting holes to be repaired, thereby effectively improving the efficiency of repairing the connecting holes.

[0037] In the present disclosure, the diameter of the first via hole 111 may be consistent with the diameter of the second via hole 121, and the diameter of the threaded hole 21 is smaller than the diameter of the first via hole 111. This facilitates the connection of the connecting screw 13.

[0038] In the present disclosure, the auxiliary connecting member 20 may be made of steel, so that the strength of the auxiliary connecting member 20 can be improved.

[0039] In the present disclosure, the auxiliary connecting member 20 may be made of different materials to improve on-site adaptability.

[0040] In the present disclosure, the strength of the material of the auxiliary connecting member 20 may be higher than the strength of the material of the first connecting member 11. In this way, the strength of the repaired threaded hole 21 may be better and the service life may be longer.

[0041] In the present disclosure, the material strength of the connection hole on the first connection member 11 is low. If the connection hole is damaged, the surrounding material strength will be insufficient if the hole expansion repair method is used, and it is not applicable to failed threads that are difficult to weld. If the entire component needs to be replaced as a whole after individual threads fail, it will result in a long processing cycle and increased costs.

[0042] like Figure 6 As shown, a method for repairing a threaded hole 21 of a metal member 100 is provided. The metal member 100 to be repaired includes a first connecting member 11, and a connecting hole to be repaired is provided on the first connecting member 11. The first connecting member 11 includes a first surface and a second surface arranged opposite to each other, and a first end of the connecting hole to be repaired extends to the first surface. The method includes: S100: Arranging a mounting groove 112 at a position on the second surface corresponding to the second end of the connecting hole to be repaired; S200: providing an auxiliary connecting member 20, wherein the auxiliary connecting member 20 is provided with a threaded hole 21, S300: embed the auxiliary connecting member 20 into the installation groove 112, and make the threaded hole 21 communicate with the connecting hole to be repaired and be coaxially arranged.

[0043] Specifically, a threaded hole 21 is provided on the auxiliary connecting member 20, and the threaded hole 21 is connected to the connecting hole to be repaired and arranged coaxially, and the auxiliary connecting member 20 is embedded in the first connecting member 11, so that the threaded hole 21 can replace the connecting hole to be repaired and connect to the threaded connecting member, that is, the connecting hole to be repaired on the first connecting member 11 is repaired by using the threaded hole 21. This method can repair multiple failed threads at one time to improve the maintenance efficiency.

[0044] In the present disclosure, the strength of the material of the auxiliary connecting member 20 is higher than the strength of the material of the first connecting member 11. In the above step S300, embedding the auxiliary connecting member 20 in the installation groove 112 may specifically include: The auxiliary connecting member 20 is inserted into the mounting groove 112 by means of interference fit. This arrangement can facilitate the connection between the auxiliary connecting member 20 and the first connecting member 11.

[0045] In some embodiments, the auxiliary connecting member 20 and the mounting groove 112 may also be connected by welding, as long as the stability of the connection between the auxiliary connecting member 20 and the first connecting member 11 can be ensured.

[0046] For example, in actual applications, the oil baffle end cover of the steam turbine generator is made of cast aluminum. The outer circle of the oil baffle end cover (equivalent to the first connecting piece 11) is fastened to the large end cover of the generator (equivalent to the second connecting piece 12) by bolts (equivalent to the connecting screws 13). The inner circle of the oil baffle end cover is processed with internal threads. The oil baffle end cover is fastened and installed on the oil baffle end cover by bolts to form a seal to prevent lubricating oil leakage during unit operation. After many overhauls, the generator shaft oil baffle end cover is disassembled and reinstalled, and the fastening bolts are frequently disassembled. The inner circle thread of the oil baffle end cover slips and fails, and the tightening force decreases.

[0047] The oil baffle cover is made of cast aluminum, which has low strength. The same problem still occurs after multiple disassembly of the expansion hole and the expansion sleeve, which cannot fundamentally solve the problem. At the same time, due to the low melting point and high thermal conductivity of aluminum, it is easy to produce an oxide film during welding, which affects the welding quality. The method of welding the threaded hole and re-drilling is not applicable.

[0048] In the present disclosure, a thread repair method is provided, which can completely solve the problem of failed threads of low-strength materials. All the original inner ring threads of the oil baffle end cover (for example, M16) are re-expanded to φ25mm, and a groove is made on the back of the oil baffle end cover based on the center of the original thread (the installation groove 112 mentioned above). The groove depth can be set to 8.5mm, and the groove width can be set to 60mm. At the same time, an insert kit (the auxiliary connecting piece 20 mentioned above) is processed. The insert kit can be made of #45 steel. Sealant is applied to the groove of the oil baffle end cover, and the processed set of insert kits is installed in the groove of the oil baffle end cover. By installing the set of insert kits, the material of the inner ring thread of the oil baffle end cover is changed from cast iron to #45 steel. While repairing the threaded hole 21, the material of the threaded hole 21 can be changed to improve the strength of the threaded hole 21.

[0049] The thread repair method can be used as a design solution to improve the thread strength of the connecting hole of the original first connecting member 11, thereby improving the initial design strength of the thread.

[0050] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings; however, the present disclosure is not limited to the specific details in the above embodiments. Within the technical concept of the present disclosure, a variety of simple modifications can be made to the technical solution of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.

[0051] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction, and the present disclosure will not further explain various possible combinations.

[0052] In addition, various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.

Claims

1. A metal part with a thread repair structure, characterized in that: include; A first connecting member, wherein a first via hole is provided on the first connecting member; The thread repair structure comprises an auxiliary connecting piece, wherein the auxiliary connecting piece is provided with a threaded hole, and the auxiliary connecting piece is embedded in the first connecting piece, and the threaded hole is communicated with the first through hole and is coaxially arranged.

2. The metal part with a thread repair structure according to claim 1, characterized in that: The metal member also includes a second connecting member and a connecting screw, The second connecting member is provided with a second via hole; The connecting screw is passed through the second through hole and the first through hole and is threadedly connected to the threaded hole, so that the first connecting member and the second connecting member are connected.

3. The metal part with a thread repair structure according to claim 1, characterized in that: The first connecting member is provided with a mounting groove, and the auxiliary connecting member is fixedly mounted in the mounting groove.

4. The metal part with a thread repair structure according to claim 3, characterized in that: The auxiliary connecting member includes a connecting plate and a threaded sleeve, the threaded hole is defined inside the threaded sleeve, the connecting plate is embedded in the mounting groove, and the threaded sleeve is inserted in the first through hole.

5. The metal part with a thread repair structure according to claim 2, characterized in that: The number of the first via holes is plural, the number of the second via holes is plural corresponding to the number of the first via holes, and the number of the threaded holes is plural corresponding to the number of the first via holes.

6. The metal part with a thread repair structure according to claim 2, characterized in that: The diameter of the first via hole is consistent with the diameter of the second via hole, and the diameter of the threaded hole is smaller than the diameter of the first via hole.

7. The metal part with a thread repair structure according to claim 1, characterized in that: The auxiliary connecting piece is made of steel.

8. The metal part with a thread repair structure according to any one of claims 1 to 7, characterized in that: The strength of the material of the auxiliary connecting member is higher than the strength of the material of the first connecting member.

9. A method for repairing a threaded hole of a metal part, characterized in that: The metal part to be repaired comprises a first connecting part, a connecting hole to be repaired is provided on the first connecting part, the first connecting part comprises a first surface and a second surface arranged opposite to each other, and a first end of the connecting hole to be repaired extends to the first surface; The method includes: A mounting groove is provided on the second surface at a position corresponding to the second end of the connecting hole to be repaired; Providing an auxiliary connecting piece, wherein the auxiliary connecting piece is provided with a threaded hole; The auxiliary connecting piece is embedded in the installation groove, and the threaded hole is connected with the connecting hole to be repaired and arranged coaxially.

10. The method for repairing a threaded hole of a metal part according to claim 9, characterized in that: The strength of the material of the auxiliary connecting member is higher than the strength of the material of the first connecting member, and the step of embedding the auxiliary connecting member in the mounting groove comprises: The auxiliary connecting piece is embedded in the installation groove by means of interference fit.

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