Positioning nail welding tool

Abstract

The utility model provides a positioning nail welding tool, which belongs to the field of shock absorber equipment, and comprises an upper electrode, the upper electrode is abutted against an oil storage tank, a lower electrode is arranged below the upper electrode, and the lower electrode is abutted against a welding nail, and the positioning nail welding tool is characterized by further comprising a positioning column, a placing cavity is arranged in the positioning column, and the welding nail is placed in the placing cavity. The placing cavity is used for limiting the welding nail; a plurality of lower electrodes are arranged on the side of the positioning column, the lower electrodes are connected with a moving assembly, the moving assembly drives the lower electrodes to be away from or abut against the welding nails, and the ends, away from the positioning column, of the welding nails protrude out of the upper surfaces of the lower electrodes. The welding nail is placed in the positioning column, the moving assembly drives the lower electrode to abut against the welding nail, the oil storage tank is pressed downwards to make contact with the welding nail, the upper electrode and the lower electrode on the oil storage tank make indirect contact through the welding nail, high temperature is generated, the welding nail is melted, and welding is completed.

Description

Technical Field

[0001] This utility model relates to the field of vibration damper equipment, specifically to a positioning pin welding fixture. Background Technology

[0002] To achieve precise connection and fixation between components such as oil storage tanks and vibration dampers, positioning pins need to be welded. These positioning pins serve as a connection medium, firmly connecting the oil storage tank and vibration dampers together through welding. This ensures that the components maintain a relatively stable position during operation, preventing loosening or detachment due to vibration, impact, or other factors, thus guaranteeing the overall stability and reliability of the vibration damper structure. Current technology primarily utilizes electrodes to perform the welding of these positioning pins. Specifically, existing technology involves completely inserting the positioning pin into an electrode, using the high temperature generated by the electrode's conductivity to melt the pin, thereby achieving connection with the component to be welded (such as the oil storage tank). The core function of the electrode is to provide a conductive path and positioning foundation for the positioning pin welding.

[0003] However, existing technologies have significant problems in practical applications. Because the existing technology completely inserts the positioning pin inside the electrode, during the welding process, when the electrode and positioning pin are continuously conductive, a large amount of high temperature is generated, causing the positioning pin to melt excessively. At this point, the melted positioning pin easily adheres to the electrode. Specifically: firstly, because the positioning pin is completely inside the electrode, the contact area between the two is large, and the heat is concentrated and difficult to dissipate during conduction, exacerbating the melting of the positioning pin; secondly, after welding, if the power is not cut off in time or the electrode and positioning pin are not separated, the continuous high temperature will cause the positioning pin and electrode contact surface to completely fuse, forming an inseparable bond. Utility Model Content

[0004] In view of this, the present invention provides a positioning pin welding fixture, which can drive the lower electrode to contact the welding pin through a moving component, and the oil tank is pressed down to contact the welding pin. The upper electrode and the lower electrode on the oil tank indirectly contact each other through the welding pin to generate high temperature, which melts the welding pin and completes the welding.

[0005] To solve the above-mentioned technical problems, this utility model provides a positioning pin welding fixture, including an upper electrode that abuts against an oil storage tank and is used to conduct electricity to the oil storage tank. Below the upper electrode is a lower electrode that abuts against a welding pin. The oil storage tank also has a welding pin at one end near the lower electrode. The lower electrode slides on a base plate. A positioning post is located at the center of the base plate. The lower electrode is located on the side of the positioning post. The positioning post has a placement cavity for placing the welding pin. The placement cavity is used to limit the welding pin and prevent it from shaking on the positioning post, which would cause the welding pin to misalign with the welding pin on the oil storage tank and cause welding misalignment.

[0006] The lower electrode moves by connecting to a moving component, which moves it away from or against the welding nail. The moving component is a pneumatic pusher. The pneumatic pusher pushes the lower electrode to contact the welding point on the positioning post, conducting electricity to the welding nail on the positioning post. Then, the oil tank is pressed down, causing the oil tank to contact the welding nail on the positioning post. Because the oil tank is in contact with the upper electrode, and the welding nail on the positioning post is in contact with the lower electrode, the upper and lower electrodes are opposite electrodes. When the oil tank and the welding nail on the positioning post come into contact, a short circuit occurs at the contact point, generating high temperature, which melts the welding nail and completes the welding. When the oil tank is pressed down and comes into contact with the welding nail on the positioning post, the pneumatic pusher receives a command (PLC command) to move the lower electrode away from the welding nail, preventing the upper and lower electrodes from continuously discharging and causing the welding nail to melt on the lower electrode. Alternatively, after the oil tank and the welding nail on the positioning post come into contact, the power is cut off in time to prevent the upper and lower electrodes from continuously discharging and causing the welding nail to completely melt and stick to the lower electrode.

[0007] Two movable components are arranged in a circular array around the positioning column axis. The two movable components are arranged opposite each other. Each movable component includes a slide rail that slides on the base. The slide rail has a connecting seat. The connecting seat is detachably connected to the lower electrode to facilitate replacement of the electrode in the future if it is damaged. A mounting seat is connected to the end of the base away from the positioning column. A pneumatic push rod is installed on the mounting seat at the end away from the positioning column. The output end of the pneumatic push rod is connected to the connecting seat. The pneumatic push rod drives the connecting seat to move away from or towards the positioning column along the slide rail direction.

[0008] The positioning post is located between the opposing lower electrodes. The lower electrodes have a 7-shaped structure, which makes the end of the lower electrode abut against the welding pin inside the positioning post. This prevents the lower electrode and the part below the end from contacting the positioning post, thus preventing the positioning post from becoming conductive. In the event of welding, the bottom of the welding pin would melt into the storage cavity, causing the positioning post to lose its function and affecting work efficiency.

[0009] The lower electrode has a relief cavity on the side near the welding nail. The outer surface of the welding nail abuts against the inner surface of the relief cavity. When the moving component moves the lower electrode to abut against the welding nail in the positioning column, the relief cavity on the lower electrode can prevent the lower electrode from squeezing the welding nail, causing the welding nail to deform and affecting subsequent operations.

[0010] The end of the welding pin away from the positioning post protrudes from the upper surface of the lower electrode. The height of the welding pin is higher than the upper surface of the lower electrode. This can prevent the welding pin located inside the positioning post from melting too quickly when welding with the welding pin on the oil storage tank. It can also prevent the welding pin from melting onto the lower electrode due to the small distance between the welding pin and the lower electrode.

[0011] The lower electrode and the moving component are designed to be detachable, which facilitates the replacement of the lower electrode later. The end of the lower electrode near the oil tank has a horizontal structure, which can reduce the contact area on the upper surface of the lower electrode of the oil tank and avoid welding the oil tank and the lower electrode together.

[0012] The beneficial effects of the above-mentioned technical solution of this utility model are as follows:

[0013] 1. Prevent welding pins from sticking to the lower electrode: After welding, the lower electrode is moved away from the welding pin by a moving component (such as a pneumatic push rod) to avoid continuous discharge between the upper and lower electrodes and prevent the welding pin from sticking to the lower electrode after melting. At the same time, the end of the welding pin away from the positioning post protrudes from the upper surface of the lower electrode to avoid the welding pin sticking to the lower electrode due to too small a distance.

[0014] 2. Precise positioning of welding pins to prevent welding misalignment: The placement cavity inside the positioning column limits the welding pins, preventing them from wobbling on the positioning column and ensuring alignment with the welding pins on the oil storage tank, thus avoiding welding misalignment.

[0015] 3. To prevent the positioning post from conducting electricity and affecting work efficiency: The lower electrode has a 7-shaped structure, with its end abutting against the welding nail. This prevents the part below the end from contacting the positioning post, thus preventing the positioning post from conducting electricity and preventing the bottom of the welding nail from melting into the storage cavity and causing the positioning post to fail.

[0016] 4. Prevent welding nail deformation: A relief cavity is provided on the side of the lower electrode near the welding nail to avoid squeezing the welding nail when in contact, thus preventing its deformation from affecting subsequent operations.

[0017] 5. Reduce the risk of welding between the oil storage tank and the lower electrode: The lower electrode has a horizontal structure at the end near the oil storage tank, which reduces the contact area between the two and avoids accidental welding. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the main structure of a positioning pin welding fixture according to the present invention;

[0019] Figure 2 This utility model Figure 1 A schematic diagram of the local structure at point A.

[0020] Explanation of reference numerals in the attached drawings: 1. Upper electrode; 2. Lower electrode; 3. Oil storage tank; 4. Welding nail; 5. Positioning post; 6. Placement cavity; 7. Moving component; 8. Relief cavity. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the following will be described in conjunction with the accompanying drawings of the embodiments of this utility model. Figure 1-2The technical solutions of the embodiments of this utility model are clearly and completely described herein. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the described embodiments of this utility model are within the protection scope of this utility model.

[0022] like Figure 1 , 2 As shown:

[0023] This embodiment provides a positioning pin welding fixture, including an upper electrode 1 and a lower electrode 2 assembly. The upper electrode 1 directly contacts the surface of the oil storage tank 3, providing a conductive path to the tank. The lower electrode 2 is positioned below the upper electrode 1, contacting the side of a welding pin 4. A welding pin 4 is also installed at the end of the oil storage tank 3 near the lower electrode 2; these two welding pins 4 will become the key connection points for the welding operation. The lower electrode 2 can slide on a base plate, and a positioning post 5 is fixed at the center of the base plate, with the lower electrode 2 located beside the positioning post 5. A placement cavity 6 is provided on the upper surface of the positioning post 5, used to place the welding pin 4 and limit its movement. This limitation prevents the welding pin 4 from wobbling on the positioning post 5, ensuring precise alignment between the welding pin 4 on the positioning post 5 and the welding pin 4 on the oil storage tank 3, fundamentally avoiding welding misalignment caused by the welding pin 4.

[0024] like Figure 1 , 2 As shown:

[0025] The lower electrode 2 moves on the base plate via a connecting component 7. The connecting component 7 moves the lower electrode 2 away from or against the welding nail 4. The connecting component 7 can be a pneumatic pusher, etc. When welding is required, the pneumatic pusher pushes the lower electrode 2 towards the positioning post 5 until it contacts the welding nail 4 on the positioning post 5. At this point, the lower electrode 2 provides a conductive path for the welding nail 4. Subsequently, the oil tank 3 applies downward pressure, causing the welding nail 4 on the oil tank 3 to contact the welding nail 4 on the positioning post 5. Because the oil tank 3 remains in contact with the upper electrode 1, and the welding nail 4 on the positioning post 5 contacts the lower electrode 2, and the upper electrode 1 and lower electrode 2 are opposite electrodes, a short circuit occurs at the point of contact when the oil tank 3 contacts the welding nail 4 on the positioning post 5. This generates a large amount of high temperature, which rapidly melts the welding nail 4, thus completing the welding operation. It is particularly important to note that when the oil tank 3 is pressed down and comes into contact with the welding nail 4 on the positioning post 5, the pneumatic push rod will receive a PLC command and immediately move the lower electrode 2 away from the welding nail 4. This is done to prevent continuous discharge between the upper electrode 1 and the lower electrode 2, thus preventing the welding nail 4 from melting and sticking to the lower electrode 2; or, to promptly cut off the power after the oil tank 3 comes into contact with the welding nail 4 on the positioning post 5, similarly to prevent continuous discharge from causing the welding nail 4 to completely melt and stick to the lower electrode 2, affecting subsequent welding operations.

[0026] like Figure 1 , 2 As shown:

[0027] Two moving components 7 are provided, arranged in a circular array around the axis of the positioning column 5, and positioned opposite each other. Each moving component 7 includes a slide rail, a connecting seat, a mounting base, and a pneumatic push rod. The slide rail is mounted on the base, and the lower electrode 2 is connected to the slide rail via the connecting seat. The connecting seat and the lower electrode 2 are detachably connected, facilitating quick replacement if the lower electrode 2 is damaged. The end of the base furthest from the positioning column 5 is connected to the mounting base, and the pneumatic push rod is mounted on the side of the mounting base furthest from the positioning column 5, with its output end fixedly connected to the connecting seat. Through the extension and retraction of the pneumatic push rod, the connecting seat can move linearly along the slide rail, moving away from or towards the positioning column 5, thereby achieving precise movement control of the lower electrode 2.

[0028] like Figure 1 As shown:

[0029] The positioning post 5 is located between two opposing lower electrodes 2, which employ a unique 7-shaped structure design. This structure ensures that the end of the lower electrode 2 accurately contacts the welding nail 4 within the positioning post 5, while preventing the portion below the end of the lower electrode 2 from contacting the positioning post 5. This design effectively prevents the positioning post 5 from becoming conductive during welding, thus preventing the bottom of the welding nail 4 from melting and flowing into the storage cavity, causing the positioning post 5 to lose its positioning function for the welding nail 4, and affecting the efficiency and quality of the entire welding process.

[0030] like Figure 2 As shown:

[0031] A clearance cavity 8 is provided on the side of the lower electrode 2 near the welding nail 4, and the inner surface of the clearance cavity 8 abuts against the outer surface of the welding nail 4. When the moving component 7 moves the lower electrode 2 toward the welding nail 4 in the positioning post 5 and abuts against it, the presence of the clearance cavity 8 can prevent the lower electrode 2 from squeezing the welding nail 4, thereby preventing the welding nail 4 from deforming due to squeezing and ensuring that subsequent welding operations can proceed smoothly. In addition, the end of the welding nail 4 away from the positioning post 5 protrudes from the upper surface of the lower electrode 2, and the height of the welding nail 4 is higher than the upper surface of the lower electrode 2. The advantage of this design is that when the welding nail 4 is welded to the welding nail 4 on the oil storage tank 3, it can prevent the welding nail 4 in the positioning post 5 and the welding nail 4 on the oil storage tank 3 from melting too quickly, resulting in an insufficient gap between the welding nail 4 and the lower electrode 2, thereby preventing the welding nail 4 from sticking to the lower electrode 2 after melting.

[0032] like Figure 1 , 2 As shown:

[0033] The lower electrode 2 and the moving component 7 are detachably connected, greatly facilitating the replacement of the lower electrode 2 later. Simultaneously, the end of the lower electrode 2 closest to the oil storage tank 3 is designed with a horizontal structure, which reduces the contact area between the oil storage tank 3 and the upper surface of the lower electrode 2. By reducing the contact area, accidental welding between the oil storage tank 3 and the lower electrode 2 during the welding process can be effectively avoided, ensuring the accuracy and reliability of the welding operation.

[0034] Working principle: First, the welding nail 4 is placed into the placement cavity 6 of the positioning column 5 to limit its movement and prevent welding misalignment. The moving component 7 (pneumatic push rod) drives the lower electrode 2 to contact the welding nail 4. At this time, the upper electrode 1 is in contact with the oil tank 3, and the lower electrode 2 is in contact with the welding nail 4. The oil tank 3 is pressed down, causing the welding nail 4 on the oil tank 3 to contact the welding nail 4 on the positioning column 5. Since the upper and lower electrodes 2 are opposite electrodes, the contact area short-circuits and generates high temperature, causing the welding nail 4 to melt and complete the welding. At the same time, the PLC command controls the pneumatic push rod to move the lower electrode 2 away from the welding nail 4, preventing the upper and lower electrodes 2 from continuously discharging and causing the welding nail 4 to melt and stick to the lower electrode 2.

[0035] Furthermore, it should be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0036] The above description is the preferred embodiment of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications should also be considered within the protection scope of this utility model.

Claims

1. A positioning pin welding tool, comprising an upper electrode (1) which is in contact with a reservoir (3), below which there is a lower electrode (2) which is in contact with a welding pin (4), characterised in that: Also include: Positioning column (5), the upper surface of the positioning column (5) has a placement cavity (6), which is used for placing a welding nail (4), and the placement cavity (6) is used for limiting the welding nail (4); The side of the positioning column (5) is provided with a plurality of lower electrodes (2), the lower electrode (2) is connected with the moving assembly (7), the moving assembly (7) drives the lower electrode (2) away from or abuts the welding nail (4), and the welding nail (4) protrudes from one end of the positioning column (5) away from the upper surface of the lower electrode (2).

2. A positioning pin welding fixture as claimed in claim 1, characterized in that: The moving assembly (7) is provided with a plurality of moving assemblies (7) arranged in a circular array around the axis of the positioning column (5).

3. A positioning pin welding fixture as claimed in claim 2, characterized in that: The moving assembly (7) is a pneumatic push rod.

4. The positioning pin welding fixture of claim 1, wherein: The lower electrode (2) is in a 7-shaped structure.

5. A positioning pin welding fixture as claimed in claim 4, characterized in that: The lower electrode (2) is close to the side of the welding nail (4) and has a let go cavity (8), and the outer surface of the welding nail (4) abuts the inner surface of the let go cavity (8).

6. A positioning pin welding fixture as claimed in claim 5, characterized in that: The lower electrode (2) and the moving assembly (7) are detachably arranged.

7. A positioning pin welding fixture as claimed in claim 6, characterized in that: The lower electrode (2) is close to the end of the oil tank (3) and is in a horizontal structure.

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