Welding positioning tool for welding sealing nut

Abstract

The utility model discloses welding sealing nut welding positioning frock in the technical field of sealing nut processing, including the shell for supporting, still include: the first positioning pin for positioning nut is screwed in the shell, the first positioning pin is coaxial with the shell arrangement, the second positioning pin for fixed sheet metal spare is slidably arranged on the first positioning pin, and the reed is detachably arranged on the second positioning pin. The utility model discloses through the coaxial screw connection of first positioning pin and shell, ensures the absolute coaxial degree of nut and frock to establish accurate positioning foundation, and cooperates three labiums type slidable second positioning pin and the elastic cooperation of reed simultaneously, and when sheet metal spare is pressed down, and the second positioning pin is along the sliding groove self -adaptation contraction and sticks together in the inner wall of opening, realizes the floating adaptive positioning of sheet metal spare, and the different shaft deviation of sheet metal opening and nut / sealing washer is automatically eliminated, avoids the formation leakage channel because of the misplacement, has solved the situation that the existing fixed positioning structure can not adjust the coaxial degree, and the misplacement is easy to appear.

Description

Technical Field

[0001] This utility model relates to the field of sealing nut processing technology, and in particular to a welding positioning tool for welding sealing nuts. Background Technology

[0002] Welded sealing nuts are widely used in connection structures that require sealing performance, especially in connection systems in the new energy field. The reliability of the seal after welding directly determines the safety and durability of the overall structure. Positioning methods are needed to ensure the relative positional accuracy of the nut and the sheet metal part in order to achieve stable welding and effective sealing. Currently, in the processing of welded sealing nuts, positioning structures are usually used to fix the nut and the sheet metal part so that the corresponding holes are aligned before welding is carried out.

[0003] However, in practical applications, the opening size of sheet metal parts is often larger than the inner diameter of the nut and its matching sealing ring. Existing positioning structures are mostly fixed and cannot be adaptively adjusted according to the actual positional deviation between the sheet metal opening and the nut / sealing ring. This easily leads to misalignment between the sheet metal opening and the nut / sealing ring, resulting in misalignment. At the same time, under common welding methods such as projection welding, the weld point at the support surface where the nut contacts the sheet metal part often fails to melt completely, making it easy for gaps to form between the nut support surface and the sheet metal part. The superposition of the above misalignment and gaps will form a through leakage channel at the connection point, directly causing sealing failure. In addition, existing positioning structures also lack effective guiding design for the sealing ring. The sealing ring is difficult to deform sufficiently during welding to fill any possible gaps, further reducing sealing reliability and failing to meet the usage requirements of high-precision sealing connection scenarios. Therefore, we urgently need a welding positioning fixture for welding sealing nuts to solve the above problems. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a welding positioning fixture for a welded sealing nut. By positioning the nut with a first positioning pin coaxially threaded with the outer shell, and a three-lobed sliding second positioning pin floatingly adapting to the sheet metal, along with a guide area to guide the deformation of the sealing ring, it can prevent misalignment between the sheet metal and the nut, fill gaps, and solve the problems of difficult positioning and sealing failure in existing technologies.

[0005] The objective of this invention is achieved as follows: it includes a supporting outer shell, and further includes: A first locating pin is threaded into the housing to position the nut, and the first locating pin is coaxially arranged with the housing; a second locating pin is slidably arranged on the first locating pin to fix the sheet metal part; a spring is detachably arranged on the second locating pin, and the second locating pin has a groove that matches the spring; a guide area is arranged at the end of the second locating pin to guide the sealing ring.

[0006] Optionally, the number of the second positioning pins is three, and the three sets of the second positioning pins are arranged in a ring at equal intervals around the axis of the first positioning pin.

[0007] Optionally, a sliding groove is provided on the first positioning pin and at the position corresponding to the second positioning pin. A sliding block is slidably connected in the sliding groove. A positioning protrusion for fixing the second positioning pin is integrally formed on the sliding block. When the end of the second positioning pin is inserted into the positioning protrusion, an installation area is formed.

[0008] Optionally, the upper and lower inner walls of the slot are integrally formed with stepped platforms for adjusting the preload of the spring, and the two ends of the spring abut against the symmetrical steps on the corresponding stepped platforms.

[0009] Optionally, the guide area includes an embedding area disposed at the end of the second locating pin for guiding the sealing ring, wherein the cross section of the embedding area is formed as an isosceles triangle, and the apex of its acute angle is set as an arc-shaped apex.

[0010] Optionally, it also includes a transition area and a positioning area disposed on the second positioning pin, wherein the transition area is located between the embedding area and the positioning area, and the connection between the transition area and the embedding area and the positioning area is a rounded transition.

[0011] Optionally, the transition zone has a conical cross-sectional shape, and the positioning zone has a columnar cross-sectional shape.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. This utility model ensures the absolute coaxiality of the nut and tooling by connecting the first positioning pin to the outer shell via a coaxial thread, thus laying the foundation for precise positioning. At the same time, in conjunction with the elastic cooperation of the three-lobed sliding second positioning pin and the spring, the second positioning pin adaptively retracts along the sliding groove and fits against the inner wall of the opening when the sheet metal part is pressed down, realizing the floating adaptation positioning of the sheet metal part. This automatically eliminates the misalignment between the sheet metal opening and the nut / sealing ring, avoiding the formation of leakage channels due to misalignment. It solves the problem that the existing fixed positioning structure cannot adjust the coaxiality and is prone to misalignment.

[0013] 2. This utility model utilizes the guiding area at the end of the second positioning pin: an arc-shaped pointed corner embedding area, a conical transition area, and a columnar positioning area. During the pre-pressing of the nut, the guiding embedding area smoothly embeds into the gap between the sealing ring and the first positioning pin. During the welding pressing process, the transition area helps to evenly compress the sealing ring along the inclined surface to all sides. Then, the positioning area limits the deformation direction of the sealing ring, ultimately forming an annular horizontal elastic sealing area between the nut support surface and the sheet metal part. This fills the gap caused by the incomplete melting of the weld point, solving the problem of insufficient deformation of the sealing ring and low sealing reliability in the prior art, and further preventing sealing failure. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the overall structure provided by this utility model.

[0016] Figure 2 This is a frontal half-sectional structural schematic diagram provided by this utility model.

[0017] Figure 3 This is a schematic diagram of the sliding groove structure provided by this utility model.

[0018] Figure 4 This is a schematic diagram of the second positioning pin structure provided by this utility model.

[0019] Figure 5 This is a cross-sectional view of the second positioning pin provided by this utility model.

[0020] Figure 6 A schematic diagram of the stepped platform structure provided by this utility model.

[0021] Figure 7 This is a partially enlarged structural schematic diagram of the present invention.

[0022] In the diagram: 1. Outer shell; 2. First positioning pin; 3. Second positioning pin; 4. Spring; 5. Slot; 6. Sliding groove; 7. Sliding block; 8. Positioning protrusion; 9. Stepped platform; 10. Embedding area; 11. Transition area; 12. Positioning area. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] like Figure 1-7 As shown in the figure, the present invention provides a welding positioning fixture for a welding sealing nut, which includes a housing 1 for support.

[0025] Here, the outer shell 1 serves as the basic support component of the tooling. Its advantage lies in providing a stable installation benchmark and bearing platform for all functional components, such as the first positioning pin 2 and the second positioning pin 3. Through its own structural strength, it ensures that the tooling will not undergo overall deformation or displacement during welding operations, such as when the nut is pressed down or when vibrations and pressures are generated during welding. This ensures the stability of the entire positioning system from the bottom up, avoiding positioning deviations caused by unstable support, and providing a foundation for subsequent precise positioning and sealing optimization.

[0026] It also includes a first locating pin 2 threadedly connected inside the housing 1 for positioning the nut, the first locating pin 2 being coaxially arranged with the housing 1.

[0027] Here, the first locating pin 2 is connected to the outer shell 1 via threads and maintains a coaxial configuration, ensuring the absolute coaxiality of the nut and the tooling, thus avoiding sealing risks caused by positioning deviations from the outset. In existing technologies, fixed shaft pins are prone to displacement due to installation errors or wear. However, this structure achieves coaxial linkage between the nut, the first locating pin 2, and the outer shell 1 through threaded locking. When the nut is fitted onto it, the precise coaxiality of the first locating pin 2 can be directly utilized to ensure the initial alignment accuracy of the nut and the welding hole on the sheet metal part, reducing the risk of misalignment caused by the misalignment between the nut and the sheet metal part, and providing a prerequisite for subsequent sealing optimization.

[0028] The second positioning pin 3 is slidably set on the first positioning pin 2 to fix the sheet metal part. There are three second positioning pins 3, and the three sets of second positioning pins 3 are arranged in a ring at equal intervals around the axis of the first positioning pin 2.

[0029] Here, the second locating pin 3 enables the floating adaptation and positioning of the sheet metal part, effectively eliminating the impact of sheet metal opening deviation. Existing fixed positioning structures cannot adapt to sheet metal opening size or position deviations, easily leading to misalignment; while this structure utilizes the stability of three-point positioning to fix the sheet metal part in all directions, and through sliding characteristics, it can adaptively adjust its position when the sheet metal part is placed. If there is a deviation in the sheet metal opening, the second locating pin 3 will slide along the preset direction and fit against the inner wall of the opening, always maintaining the relative alignment between the sheet metal part and the tooling, avoiding the misalignment of the sheet metal opening and the nut / sealing ring, and blocking the leakage channel caused by misalignment.

[0030] A sliding groove 6 is provided on the first positioning pin 2 and at the position corresponding to the second positioning pin 3. A sliding block 7 is slidably connected in the sliding groove 6. A positioning protrusion 8 for fixing the second positioning pin 3 is integrally formed on the sliding block 7. When the end of the second positioning pin 3 is inserted into the positioning protrusion 8, an installation area is formed.

[0031] Here, the sliding groove 6 and the sliding block 7 ensure the stability and accuracy of the sliding of the second positioning pin 3, further improving the positioning reliability. The sliding groove 6 provides a preset guide track for the sliding block 7, restricting the second positioning pin 3 to slide only in the direction close to / away from the first positioning pin 2, avoiding radial offset or wobbling during adaptive adjustment, and ensuring the accuracy of the sheet metal part positioning; at the same time, the mounting area formed by the positioning protrusion 8 can firmly fix the second positioning pin 3, preventing the second positioning pin 3 from loosening due to vibration during welding, and ensuring that the clamping and positioning state of the second positioning pin 3 on the sheet metal part remains stable throughout the entire welding cycle.

[0032] A spring 4 is detachably mounted on the second positioning pin 3. The second positioning pin 3 has a slot 5 that matches the spring 4. The upper and lower inner walls of the slot 5 are integrally formed with stepped platforms 9 for adjusting the preload of the spring 4. The two ends of the spring 4 abut against the symmetrical steps on the corresponding stepped platforms 9.

[0033] Here, the slot 5 with the stepped platform 9 and the spring 4 can flexibly adjust the preload of the spring 4, ensuring the elastic reset capability of the second positioning pin 3 and adapting to sheet metal parts of different specifications. In the existing structure, the preload of the spring 4 is fixed, which can easily lead to loose positioning due to insufficient preload or deformation of the sheet metal due to excessive preload. However, in this structure, the stepped platform 9 on the inner wall of the slot 5 can adjust the preload as needed by changing the position of the step that the spring 4 abuts against. When the sheet metal part is pressed down, the spring 4 compresses and stores elastic potential energy. After welding, the spring 4 releases the potential energy to push the second positioning pin 3 to reset, facilitating the next operation. Regardless of the thickness of the sheet metal part or the size of the opening, the clamping force of the second positioning pin 3 can be adapted by adjusting the preload, while ensuring the timeliness and stability of the reset.

[0034] The guide area set at the end of the second locating pin 3 is used to guide the sealing ring. The guide area can guide the sealing ring to deform fully and smoothly to form an effective sealing area and avoid sealing failure.

[0035] The guide area includes an embedding area 10 located at the end of the second positioning pin 3 for guiding the sealing ring. The cross-section of the embedding area 10 is formed as an isosceles triangle, with the acute angle having an arc-shaped apex.

[0036] Here, the curved corner of the embedding area 10 can easily fit into the gap between the sealing ring and the first positioning pin 2, avoiding scratching the sealing ring.

[0037] It also includes a transition area 11 and a positioning area 12 disposed on the second positioning pin 3. The transition area 11 is located between the embedding area 10 and the positioning area 12, and the connection between the transition area 11 and the embedding area 10 and the positioning area 12 is a rounded transition. The cross-sectional shape of the transition area 11 is conical, and the cross-sectional shape of the positioning area 12 is columnar.

[0038] Here, the transition zone 11 features a conical and arc-shaped transition design, allowing the sealing ring to be smoothly squeezed outwards along the inclined surface when the nut is pressed down, preventing damage to the sealing ring due to uneven force.

[0039] Furthermore, the 12-column structure in the positioning area limits the deformation sealing ring, ensuring that it forms an annular horizontal elastic sealing area between the nut support surface and the sheet metal part, filling the gap caused by the incomplete melting of the weld point, blocking the leakage channel formed by misalignment and gap, and greatly improving the sealing reliability after welding.

[0040] The working principle and usage process of this utility model are as follows: Using the outer shell 1 as the basic support carrier, the nut is first precisely positioned by the first positioning pin 2, which is coaxial with and threaded to the outer shell 1, ensuring absolute coaxiality between the nut and the tooling. Then, the sheet metal part to be welded is placed on the three-lobed second positioning pin 3, which is slidably mounted on the first positioning pin 2. In its free state, the second positioning pin 3 is separated under the elastic action of the spring 4. When the opening of the sheet metal part is aligned with the second positioning pin 3 and pressed down, the second positioning pin 3 retracts inward along the sliding groove 6 on the first positioning pin 2, adaptively fitting the inner wall of the opening of the sheet metal part to achieve floating positioning of the sheet metal part, ensuring that the sheet metal hole is coaxial with the tooling and preventing misalignment between the nut and the sheet metal part. Next, a pre-pressed sleeve is applied. The sealing ring nut on the first positioning pin 2 and the second positioning pin 3 with the arc-shaped pointed end of the insertion area 10 are embedded in the gap between the sealing ring and the first positioning pin 2. As the nut is continuously pressed down, the sealing ring is smoothly squeezed outwards along the conical and arc-shaped transition area 11 on the second positioning pin 3, and gradually fills the gap between the nut support surface and the sheet metal part under the limiting action of the columnar positioning area 12. Finally, when the power is turned on for welding, the pressure is continued to be maintained, so that the sealing ring is further deformed under pressure and welding conditions, forming an annular horizontal elastic sealing area between the nut support surface and the sheet metal part to block the leakage channel formed by misalignment and gap. After welding is completed, the spring 4 releases elastic potential energy to push the second positioning pin 3 to reset, completing one welding positioning operation.

[0041] The above description of the embodiments is only for the purpose of helping to understand the method and core idea of ​​this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made to this utility model without departing from the principle of this utility model, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. A welding positioning fixture for a welding sealing nut, comprising a housing (1) for support, characterized in that: Also includes: A first locating pin (2) is threaded inside the housing (1) to position the nut, and the first locating pin (2) is coaxially arranged with the housing (1); A second positioning pin (3) is slidably set on the first positioning pin (2) for fixing the sheet metal part, and a spring (4) is detachably set on the second positioning pin (3). A slot (5) matching the spring (4) is opened on the second positioning pin (3). The guide area is set at the end of the second locating pin (3) to guide the sealing ring.

2. The welding positioning fixture for a welding sealing nut according to claim 1, characterized in that: The number of the second positioning pins (3) is three, and the three sets of the second positioning pins (3) are arranged in a ring at equal intervals around the axis of the first positioning pin (2).

3. The welding positioning fixture for a welding sealing nut according to claim 1, characterized in that: A sliding groove (6) is provided on the first positioning pin (2) and at the position corresponding to the second positioning pin (3). A sliding block (7) is slidably connected in the sliding groove (6). A positioning protrusion (8) for fixing the second positioning pin (3) is integrally formed on the sliding block (7). When the end of the second positioning pin (3) is inserted into the positioning protrusion (8), an installation area is formed.

4. The welding positioning fixture for a welding sealing nut according to claim 1, characterized in that: The upper and lower inner walls of the slot (5) are integrally formed with stepped platforms (9) for adjusting the preload of the spring (4), and the two ends of the spring (4) abut against the symmetrical steps on the corresponding stepped platforms (9).

5. The welding positioning fixture for a welding sealing nut according to claim 1, characterized in that: The guide area includes an embedding area (10) provided at the end of the second positioning pin (3) for guiding the sealing ring. The cross section of the embedding area (10) is formed as an isosceles triangle, with the acute angle of the triangle being set as an arc-shaped apex.

6. The welding positioning fixture for a welding sealing nut according to claim 5, characterized in that: It also includes a transition area (11) and a positioning area (12) set on the second positioning pin (3). The transition area (11) is located between the embedding area (10) and the positioning area (12), and the connection between the transition area (11) and the embedding area (10) and the positioning area (12) is set with a rounded transition.

7. The welding positioning fixture for a welding sealing nut according to claim 6, characterized in that: The transition zone (11) has a conical cross-sectional shape, and the positioning zone (12) has a columnar cross-sectional shape.

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