Welding positioning jig

Abstract

The utility model belongs to the technical field of welding, and discloses a welding positioning jig which comprises a bearing structure, a pressing structure and a threaded fastener, the bearing structure comprises a bearing table and a supporting table, the bearing table is used for bearing a through pipe body, and the supporting table is provided with a threaded hole; the pressing structure is detachably installed on the bearing structure, the pressing structure comprises a pressing table, and the pressing table is used for pressing the through pipe body on the bearing table; the threaded fastener penetrates through the threaded hole and is inserted into the non-welding end of the branch pipe. The threaded fastener is inserted into the non-welding end of the branch pipe to position the non-welding end of the branch pipe, so that it is guaranteed that the welding end of the branch pipe can be accurately welded to the through pipe body.

Description

Technical Field

[0001] The utility model relates to the technical field of welding, in particular to a welding positioning fixture. Background Art

[0002] Stainless steel tees are widely used in aircraft pipelines. They have the characteristics of high strength and corrosion resistance. They are usually used as adapters in drainage pipelines and connecting pipelines. The tee includes a pipe body and three branches. The outer walls of both ends of the pipe body are provided with external threads. The pipe body is threadedly connected between the two connection objects.

[0003] When producing stainless steel tees, three branch pipes are welded to corresponding positions of the main body of the tee. However, there is currently no suitable positioning fixture to position the main body of the tee and the branch pipes. The product is often scrapped because the welding angle of the branch pipe exceeds the error range.

[0004] Therefore, a welding positioning fixture is urgently needed to solve the above problems. Utility Model Content

[0005] The utility model aims to provide a welding positioning fixture, which adopts a threaded fastener to insert the non-welding end of the branch pipe to position the non-welding end of the branch pipe, so as to ensure that the welding end of the branch pipe can be accurately welded to the through pipe body.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] A welding positioning jig, the welding positioning jig comprising:

[0008] A bearing structure, the bearing structure comprising a bearing platform and a supporting platform, the bearing platform is used to bear the through-tube body, and the supporting platform is provided with a threaded hole;

[0009] A pressing structure, which is detachably mounted on the bearing structure, and the pressing structure comprises a pressing platform, and the pressing platform is used to press the through-tube body onto the bearing platform;

[0010] A threaded fastener is inserted through the threaded hole and into the non-welded end of the branch pipe.

[0011] As an optional technical solution, the welding positioning fixture further includes a clamp, which is sleeved on the periphery of the non-welding end of the branch pipe to clamp the non-welding end of the branch pipe to the threaded fastener.

[0012] As an optional technical solution, the threaded hole is arranged obliquely, and the threaded fastener is screwed into the threaded hole obliquely.

[0013] As an optional technical solution, the bearing structure includes three support platforms, and the three support platforms correspond one to one to the three branch pipes.

[0014] As an optional technical solution, a positioning hole is provided at the top of the supporting platform, and a positioning member is provided in the positioning hole, and the positioning member is used to be inserted into the inner hole at the lower end of the through-tube body.

[0015] As an optional technical solution, the inner wall of the positioning hole is provided with an internal thread, the outer wall of one end of the positioning member is provided with an external thread, and the end of the positioning member provided with the external thread is threadedly connected to the positioning hole.

[0016] As an optional technical solution, the pressing platform is provided with a heat exhaust hole extending through it in the vertical direction, and the heat exhaust hole can exhaust the heat generated by welding of the through-tube body.

[0017] As an optional technical solution, the welding positioning fixture also includes:

[0018] A first protective member is sleeved on the upper end of the through pipe body provided with an external thread, and the first protective member is used to protect the external thread on the upper end of the through pipe body; and / or

[0019] The second protective member is sleeved on the lower end of the through pipe body provided with external threads, and the second protective member is used to protect the external threads at the lower end of the through pipe body.

[0020] As an optional technical solution, the outer wall of the upper end of the bearing platform is provided with an external thread, the outer diameter of the upper end of the bearing platform is equal to the outer diameter of the lower end of the through-tube body, the inner wall of the second protective member is provided with an internal thread, and the second protective member can be threadedly connected to the through-tube body and the bearing platform at the same time; and / or

[0021] The outer wall of the lower end of the clamping platform is provided with an external thread, the outer diameter of the lower end of the clamping platform is equal to the outer diameter of the upper end of the through pipe body, the inner wall of the first protective piece is provided with an internal thread, and the first protective piece can simultaneously threadably connect the through pipe body and the clamping platform.

[0022] As an optional technical solution, the clamping structure further includes a support column, the support column is detachably mounted on the support platform, and the clamping platform is fixedly mounted on the support column.

[0023] Beneficial effects of the utility model:

[0024] The utility model provides a welding positioning jig, which includes a bearing structure, a clamping structure and a threaded fastener. The bearing structure includes a bearing platform and a support platform, the support platform is provided with a threaded hole, and the clamping structure includes a clamping platform. When it is necessary to weld the welding end of the branch pipe to the preset position of the through-tube body, the through-tube body is placed on the bearing platform, and then the clamping structure is installed on the bearing structure. The through-tube body is clamped to the bearing platform by the clamping platform of the clamping structure to prevent the through-tube body from moving. At the same time, the threaded fastener is screwed into the threaded hole and inserted into the non-welding end of the branch pipe, and the depth of the threaded fastener inserted into the non-welding end of the branch pipe is adjusted so that the welding end of the branch pipe can accurately abut against the preset position of the through-tube body. At this time, the contact position between the welding end of the branch pipe and the through-tube body can be welded. In the utility model, the through-tube body and the branch pipe are both positioned, and no offset occurs during the welding process, which can ensure the welding accuracy of the branch pipe on the through-tube body and reduce the defective rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of the welding positioning fixture of the utility model;

[0026] Figure 2 It is a cross-sectional view of the welding positioning fixture of the utility model.

[0027] In the figure:

[0028] 100, main body of the through pipe; 200, branch pipe;

[0029] 1. bearing structure; 11. bearing platform; 111. positioning hole; 12. supporting platform;

[0030] 2. Compression structure; 21. Compression platform; 211. Heat exhaust hole; 22. Support column;

[0031] 3. The first protective member;

[0032] 4. The second protective member;

[0033] 5. Threaded fasteners;

[0034] 6. Clamp;

[0035] 7. Positioning parts. DETAILED DESCRIPTION

[0036] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0037] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" 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 an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0039] In the description of this embodiment, the terms "upper", "lower", "right", etc., are based on the directions or positions shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0040] like Figure 1 and Figure 2 As shown, this embodiment provides a welding positioning fixture, which includes a bearing structure 1, a clamping structure 2 and a threaded fastener 5. The bearing structure 1 includes a bearing platform 11 and a support platform 12. The bearing platform 11 is used to bear the through-tube body 100, and the support platform 12 is provided with a threaded hole; the clamping structure 2 can be detachably installed on the bearing structure 1, and the clamping structure 2 includes a clamping platform 21, which is used to clamp the through-tube body 100 on the bearing platform 11; the threaded fastener 5 passes through the threaded hole and is inserted into the non-welding end of the branch pipe 200.

[0041] Specifically, when it is necessary to weld the welding end of the branch pipe 200 to the preset position of the through pipe body 100, the through pipe body 100 is placed on the bearing platform 11, and then the clamping structure 2 is installed on the bearing structure 1, and the through pipe body 100 is clamped to the bearing platform 11 by the clamping platform 21 of the clamping structure 2 to prevent the through pipe body 100 from moving. At the same time, the threaded fastener 5 is screwed into the threaded hole and inserted into the non-welding end of the branch pipe 200, and the depth of the threaded fastener 5 inserted into the non-welding end of the branch pipe 200 is adjusted so that the welding end of the branch pipe 200 can accurately abut against the preset position of the through pipe body 100. At this time, the contact position between the welding end of the branch pipe 200 and the through pipe body 100 can be welded. In this embodiment, the through pipe body 100 and the branch pipe 200 are both positioned, and no deviation occurs during the welding process, which can ensure the welding accuracy of the branch pipe 200 on the through pipe body 100 and reduce the defective rate.

[0042] In this embodiment, the threaded fastener 5 is a pin with external threads, which passes through the threaded hole of the support platform 12. The depth of the pin inserted into the non-welded end of the branch pipe 200 can be adjusted, thereby adjusting the angle between the branch pipe 200 and the through pipe body 100.

[0043] Optionally, the welding positioning fixture further includes a clamp 6, which is sleeved on the circumference of the non-welding end of the branch pipe 200 to clamp the non-welding end of the branch pipe 200 to the threaded fastener 5. After the threaded fastener 5 is inserted into the preset position, the clamp 6 is used to clamp the non-welding end of the branch pipe 200 to the threaded fastener 5 to prevent the branch pipe 200 from rotating relative to the threaded fastener 5 or detaching from the threaded fastener 5.

[0044] Optionally, the threaded hole is arranged obliquely, and the threaded fastener 5 is screwed into the threaded hole obliquely.

[0045] The branch pipe 200 is a curved pipe. In this embodiment, the central axis of the non-welded end of the branch pipe 200 is coaxial with the central axis of the threaded hole, so that the threaded fastener 5 passes through the threaded hole and is inserted into the non-welded end of the branch pipe 200.

[0046] In this embodiment, the bearing structure 1 includes three support platforms 12 , and the three support platforms 12 correspond to the three branch pipes 200 one by one.

[0047] The welding positioning fixture of this embodiment is suitable for stainless steel tee pipes. In some other embodiments, the number of support platforms 12 can be set according to actual needs, such as one, two, or even more, so as to be suitable for different products.

[0048] Optionally, a positioning hole 111 is provided at the top of the supporting platform 11 , and a positioning member 7 is provided in the positioning hole 111 . The positioning member 7 is used to be inserted into the inner hole at the lower end of the through-tube body 100 .

[0049] Before placing the through-tube body 100 on the supporting platform 11, the clamping structure 2 is not installed on the supporting structure 1, but the positioning piece 7 is inserted into the positioning hole 111. At this time, the through-tube body 100 is placed on the supporting platform 11, and the upper end of the positioning piece 7 is inserted into the inner hole of the lower end of the through-tube body 100 to pre-position the through-tube body 100. During the welding process, the positioning piece 7 can limit the movement of the through-tube body 100 in the horizontal direction.

[0050] In this embodiment, the inner wall of the positioning hole 111 is provided with an internal thread, the outer wall of one end of the positioning member 7 is provided with an external thread, and the end of the positioning member 7 with the external thread is threadedly connected to the positioning hole 111. The positioning member 7 is threadedly connected to the positioning hole 111, which can prevent the positioning member 7 from automatically deviating.

[0051] Optionally, a heat exhaust hole 211 is formed through the pressing platform 21 in the vertical direction, and the heat exhaust hole 211 can exhaust the heat generated by welding of the through-tube body 100 .

[0052] When the branch pipe 200 is welded to the through-tube body 100, a large amount of heat is generated. If too much heat is accumulated inside the through-tube body 100, the through-tube body 100 may be easily deformed due to thermal expansion. To solve this problem, in this embodiment, a heat exhaust hole 211 is provided on the pressing platform 21. The heat exhaust hole 211 vertically penetrates the pressing platform 21 and communicates with the inside of the through-tube body 100, so as to discharge heat in time.

[0053] Optionally, the welding positioning fixture also includes a first protective member 3 and / or a second protective member 4, the first protective member 3 is sleeved on the upper end of the through-tube body 100 with an external thread, and the first protective member 3 is used to protect the external thread of the upper end of the through-tube body 100; the second protective member 4 is sleeved on the lower end of the through-tube body 100 with an external thread, and the second protective member 4 is used to protect the external thread of the lower end of the through-tube body 100.

[0054] In this embodiment, the welding positioning fixture includes both the first protective member 3 and the second protective member 4 . In some other embodiments, the welding positioning fixture includes only one of the first protective member 3 and the second protective member 4 .

[0055] In this embodiment, the first protective member 3 and the second protective member 4 are both nuts. In some other embodiments, the first protective member 3 and the second protective member 4 are both sleeves. In some cases, the sleeves have internal threads.

[0056] In the process of welding metal materials, splashing molten materials are easily generated. When the molten materials stick to the surface of the product, they quickly cool down and solidify. The solidified materials are difficult to remove, which affects the appearance of the product and even causes the product to be scrapped.

[0057] In order to solve the above technical problems, the present embodiment utilizes the first protective member 3 and the second protective member 4 to protect the external threads of the through-tube body 100 , so as to prevent the splashing molten material from adhering to the external threads of the through-tube body 100 .

[0058] Optionally, the outer wall of the upper end of the supporting platform 11 is provided with an external thread, the outer diameter of the upper end of the supporting platform 11 is equal to the outer diameter of the lower end of the through-tube body 100, and the inner wall of the second protective member 4 is provided with an internal thread. The second protective member 4 can simultaneously threadably connect the through-tube body 100 and the supporting platform 11, thereby improving the stability of the through-tube body 100 and avoiding displacement during welding.

[0059] Optionally, the outer wall of the lower end of the clamping platform 21 is provided with an external thread, the outer diameter of the lower end of the clamping platform 21 is equal to the outer diameter of the upper end of the through-tube body 100, and the inner wall of the first protective member 3 is provided with an internal thread. The first protective member 3 can simultaneously threadably connect the through-tube body 100 and the clamping platform 21, thereby improving the stability of the through-tube body 100 and avoiding displacement during welding.

[0060] Optionally, the pressing structure 2 further includes a support column 22 , which is detachably mounted on the support platform 12 , and the pressing platform 21 is fixedly mounted on the support column 22 .

[0061] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the scope of protection of the present invention. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the claims of the present invention.

Claims

1. A welding positioning fixture, characterized in that: The welding positioning fixture comprises: A bearing structure (1), the bearing structure (1) comprising a bearing platform (11) and a support platform (12), the bearing platform (11) being used to bear the through-tube body (100), and the support platform (12) being provided with a threaded hole; A pressing structure (2) is detachably mounted on the bearing structure (1), wherein the pressing structure (2) comprises a pressing platform (21), and the pressing platform (21) is used to press the through-tube body (100) onto the bearing platform (11); A threaded fastener (5) passes through the threaded hole and is inserted into the non-welding end of the branch pipe (200).

2. The welding positioning fixture according to claim 1, characterized in that: The welding positioning fixture further comprises a clamp (6), wherein the clamp (6) is sleeved on the periphery of the non-welding end of the branch pipe (200) so as to clamp the non-welding end of the branch pipe (200) to the threaded fastener (5).

3. The welding positioning fixture according to claim 1, characterized in that: The threaded hole is arranged obliquely, and the threaded fastener (5) is screwed into the threaded hole obliquely.

4. The welding positioning fixture according to claim 1, characterized in that: The bearing structure (1) comprises three support platforms (12), and the three support platforms (12) correspond one to one to the three branch pipes (200).

5. The welding positioning fixture according to claim 1, characterized in that: A positioning hole (111) is provided at the top end of the support platform (11), and a positioning member (7) is provided in the positioning hole (111). The positioning member (7) is used to be inserted into the inner hole at the lower end of the through-tube body (100).

6. The welding positioning fixture according to claim 5, characterized in that: The inner wall of the positioning hole (111) is provided with an internal thread, the outer wall of one end of the positioning member (7) is provided with an external thread, and the end of the positioning member (7) provided with the external thread is threadedly connected to the positioning hole (111).

7. The welding positioning fixture according to claim 1, characterized in that: The pressing platform (21) is provided with a heat exhaust hole (211) penetrating in a vertical direction, and the heat exhaust hole (211) can exhaust the heat generated by welding of the through-tube body (100).

8. The welding positioning fixture according to any one of claims 1 to 7, characterized in that: The welding positioning fixture also includes: a first protective member (3) sleeved on the upper end of the through-tube body (100) provided with an external thread, the first protective member (3) being used to protect the external thread on the upper end of the through-tube body (100); and / or The second protective member (4) is sleeved on the lower end of the through pipe body (100) provided with an external thread, and the second protective member (4) is used to protect the external thread at the lower end of the through pipe body (100).

9. The welding positioning fixture according to claim 8, characterized in that: The outer wall of the upper end of the carrier platform (11) is provided with an external thread, the outer diameter of the upper end of the carrier platform (11) is equal to the outer diameter of the lower end of the through-tube body (100), the inner wall of the second protective member (4) is provided with an internal thread, and the second protective member (4) can simultaneously threadably connect the through-tube body (100) and the carrier platform (11); and / or The outer wall of the lower end of the pressing platform (21) is provided with an external thread, the outer diameter of the lower end of the pressing platform (21) is equal to the outer diameter of the upper end of the through-tube body (100), the inner wall of the first protective member (3) is provided with an internal thread, and the first protective member (3) can simultaneously threadably connect the through-tube body (100) and the pressing platform (21).

10. The welding positioning fixture according to claim 1, characterized in that: The pressing structure (2) further comprises a support column (22), wherein the support column (22) is detachably mounted on the support platform (12), and the pressing platform (21) is fixedly mounted on the support column (22).

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