Nut accessory welding positioning device and method

Abstract

The application discloses a nut accessory welding positioning device and method, relates to the technical field of automobile part welding positioning, and solves the poor universality of the existing nut accessory welding positioning device, improves the adaptability of the device, and reduces the cost, and the specific scheme is as follows: the device comprises a base, a positioning support slidingly arranged on the base, a support fixedly arranged on the base, and a moving plate slidingly arranged on the support, the moving plate is located directly above the positioning support, the bottom of the moving plate is provided with position-adjustable positioning rods, the positioning rods and the positioning support are provided with two and correspond to each other in an up-down mode, springs for supporting the moving plate are arranged on the support in a sleeved mode, and the moving plate is hinged to handles on the support through connecting rods, so that the circumferential movement of the handles is converted into the up-down linear movement of the moving plate.

Description

Technical Field

[0001] This invention relates to the field of automotive component welding positioning technology, and in particular to a welding positioning device and method for nut accessories. Background Technology

[0002] In the welding process of new energy bus bodies, especially during the design of a new model, design changes or temporary additions of parts often occur, leading to the need for numerous additional nut welding accessories. Nut welding is a crucial welding method used in the mass production of new energy buses. If the design changes or temporary additions of nut accessories lack welding positioning control, the welded nut accessories will be difficult to meet assembly dimensional requirements, affecting production quality and efficiency.

[0003] The welding quality and precision of nuts and accessories during the production process directly affect the quality of assembly assemblies such as doors, seats, electrical components, and interior trim. Improving defects in the nut welding process is particularly important for improving the quality and production efficiency of bus assembly products.

[0004] The inventors discovered that existing positioning fixtures for welding nut accessories are mostly temporary special devices configured for the nut accessories to be welded, and cannot adapt to different specifications of nut accessories. When welding and positioning multiple specifications of nut accessories, workers need to move back and forth between multiple corresponding positioning fixtures, wasting time, seriously affecting the speed and efficiency of bus assembly, and leading to increased production costs. Summary of the Invention

[0005] To address the shortcomings of existing technologies, the present invention aims to provide a welding positioning device and method for nut accessories. By utilizing a positioning support and a positioning rod, the device achieves the positioning and clamping of the accessory preparation plate and nut. Both the positioning support and the positioning rod are movable for position adjustment. The positioning device has strong overall adaptability and can assist in the processing of nut accessories with different hole spacings, thus solving the problem of poor versatility of existing welding positioning devices for nut accessories.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solution:

[0007] In a first aspect, the present invention provides a nut accessory welding positioning device, including a base, a positioning support slidably disposed on the base, a bracket fixedly disposed on the base, and a movable plate slidably disposed on the bracket. The movable plate is located directly above the positioning support, and an adjustable positioning rod is installed at the bottom of the movable plate. There are two positioning rods and two positioning supports, which correspond one-to-one with each other. A spring for supporting the movable plate is sleeved on the bracket. The movable plate is hinged to a handle on the bracket through a connecting rod, so as to convert the circular motion of the handle into the vertical linear motion of the movable plate.

[0008] As a further implementation, the upper surface of the base is provided with a first mounting limiting groove with a dovetail groove structure along its length, and a slider that matches the first mounting limiting groove is fixedly installed at the bottom of the positioning support.

[0009] As a further implementation, the bracket consists of two guide posts fixedly mounted on the base and a top plate connecting the tops of the two guide posts. Each guide post is fitted with a spring, and the movable plate is located between the two guide posts with both ends slidably connected to the adjacent guide posts.

[0010] As a further implementation, the top plate is hinged to the handle at its middle position, and the handle is hinged to the middle position of the upper surface of the movable plate via a connecting rod. The handle and the connecting rod, as well as the connecting rod and the movable plate, are both hinged.

[0011] As a further implementation, the movable plate is provided with two opposing second mounting limiting grooves and positioning holes along its length. The second mounting limiting grooves are located on the lower surface of the movable plate, and the top of the positioning rod is inserted into the second mounting limiting grooves. The positioning holes are elongated holes for mounting limiting screws.

[0012] As a further implementation, the side wall at the top of the positioning rod extends outward to form a plate-shaped connecting part, and the connecting part has a threaded hole that mates with the limiting screw.

[0013] As a further implementation, the positioning rod is a hollow structure, and the positioning support is a cylindrical structure. The inner diameter of the positioning rod matches the outer diameter of the positioning support to press and position the nut while covering the screw hole.

[0014] As a further implementation, the clearance between the positioning support and the nut hole diameter on one side is 0.2mm.

[0015] As a further implementation, one end of the handle is a pin hole and the other end is a limiting hook. A limiting pin that cooperates with the limiting hook is fixedly installed on the connecting rod to limit the rotation angle of the handle.

[0016] Secondly, the present invention provides a method for using a nut accessory welding positioning device, as detailed below:

[0017] Adjust the center distance between the positioning support and the positioning rod according to the hole spacing of the attachment plate. After the positioning rod is adjusted into place, tighten the limit screw.

[0018] Place the accessory plate and nut on the positioning support in sequence, pull down the handle, and the moving plate will drive the two positioning rods to move downwards, so that the two positioning rods are coaxially engaged with the two positioning supports. Use the positioning rods to press the nut and accessory plate together for welding.

[0019] After the welding operation is completed, release the handle, use the spring to lift the moving plate, and remove the welded nut accessory as a whole.

[0020] The beneficial effects of the present invention are as follows:

[0021] (1) The present invention utilizes the positioning support and positioning rod to achieve the positioning and clamping of the accessory plate and nut. Both the positioning support and positioning rod can be moved to adjust the position. The positioning device has strong overall adaptability and can assist in the processing of nut accessories with different hole spacings, reducing the amount of tooling used and lowering the cost.

[0022] (2) The connecting rod of the present invention is hinged to the middle position of the moving plate, and springs are provided at both ends of the moving plate to ensure that the force is uniform during the up and down movement of the moving plate and to avoid the phenomenon of tilting of the moving plate.

[0023] (3) The present invention uses a positioning rod to press and position the nut while covering the screw hole, which effectively prevents the problem of damage to the internal thread of the nut caused by welding spatter. There is no need to set other protective parts to protect the nut, which greatly simplifies the structure and reduces the cost.

[0024] (4) The gap between the positioning support and the nut hole diameter on one side of the present invention is 0.2mm, which can not only ensure the center distance dimension, but also avoid the problems of poor welding quality caused by the nut being tilted, welding spatter causing damage to the inner thread of the nut, and failure to meet the welding strength and fall off under stress, resulting in abnormal noise or partial failure of some functions during vehicle operation. It not only has high production efficiency and stable product quality, but is also not affected by the worker's skills.

[0025] (5) The cooperation between the limiting hook and the limiting pin of the present invention can effectively limit the rotation angle of the handle, thereby limiting the downward movement distance of the moving plate and avoiding the problem of the moving plate moving upward due to excessive pressing pressure. Attached Figure Description

[0026] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0027] Figure 1 This is a schematic diagram of the overall structure of a nut accessory welding positioning device according to one or more embodiments of the present invention;

[0028] Figure 2 This is a front view structural schematic diagram of a nut accessory welding positioning device according to one or more embodiments of the present invention;

[0029] Figure 3This is a structural schematic diagram of a nut accessory welding positioning device according to one or more embodiments of the present invention in its natural state;

[0030] Figure 4 This is a structural schematic diagram of a nut accessory welding positioning device in the clamping state according to one or more embodiments of the present invention;

[0031] Figure 5 This is a cross-sectional structural schematic diagram of a nut accessory welding positioning device according to one or more embodiments of the present invention;

[0032] In the diagram: the spacing or dimensions between parts have been exaggerated to show their positions; the diagram is for illustrative purposes only.

[0033] The components include: 1. Base; 2. Positioning support; 3. Guide post; 4. Spring; 5. Moving plate; 6. Positioning rod; 7. Limiting screw; 8. Top plate; 9. Handle; 10. Connecting rod; 11. First scale; 12. Second scale; 13. First hinge point; 14. Second hinge point; 15. Third hinge point; 16. Accessory spare plate; 17. Nut. Detailed Implementation

[0034] It should be noted that the following detailed description is illustrative and intended to provide further explanation of the invention. Unless otherwise specified, all technical and scientific terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0035] As described in the background section, existing positioning fixtures for welding nut accessories are mostly temporary special devices configured for the nut accessories to be welded, and cannot adapt to different specifications of nut accessories. When welding and positioning multiple specifications of nut accessories, workers need to move back and forth between multiple corresponding positioning fixtures, which wastes time, seriously affects the speed and efficiency of bus assembly, and leads to increased production costs. In order to solve the above technical problems, this invention proposes a nut accessory welding positioning device and method.

[0036] Example 1

[0037] In a typical embodiment of the present invention, such as Figures 1-5 As shown, a nut accessory welding positioning device is proposed, including a base 1, a positioning support 2, a bracket, a movable plate 5, and a positioning rod 6. The base 1 has a first installation limiting groove for placing the positioning support 2 along its length direction. The positioning support 2 is slidably disposed in the first installation limiting groove. There are two positioning supports 2 for positioning the accessory spare plate 16 with holes.

[0038] The bracket is fixedly installed on the base 1, and the movable plate 5 is slidably set on the bracket. The bottom of the movable plate 5 is equipped with a positioning rod 6. There are two positioning rods 6, which correspond one-to-one with the positioning support 2. The positioning rod 6 has a hollow structure for pressing the nut 17.

[0039] The movable plate 5 is hinged to the handle 9 on the bracket via the connecting rod 10. The movable plate 5 is hinged to the connecting rod 10, the handle 9 is hinged to the connecting rod 10, and the handle 9 is hinged to the bracket. The circular motion of the handle 9 is converted into the linear motion of the movable plate 5 through the hinge connection. Thus, the movable plate 5 can be driven up and down by the handle, which in turn drives the positioning rod 6 to move towards or away from the positioning support 2.

[0040] Specifically, a first mounting limiting groove is formed on the upper surface of the base 1 along its length. The first mounting limiting groove is a dovetail groove structure, that is, the cross-section of the first mounting limiting groove is an isosceles trapezoid with a smaller top and a larger bottom. A slider is fixedly installed at the bottom of the positioning support 2. The shape of the slider matches the shape of the first mounting limiting groove on the base 1, so that the positioning support 2 can slide along the length direction in the first mounting limiting groove while preventing the positioning support 2 from being pulled out of the first mounting limiting groove.

[0041] The bracket consists of guide posts 3 and a top plate 8. There are two guide posts 3, which are fixedly mounted on the base 1 by welding. The guide posts 3 are located in the first mounting limiting groove, and the tops of the two guide posts 3 are fixedly connected by the top plate 8.

[0042] Each guide post 3 is fitted with a spring 4. The movable plate 5 is located between two guide posts 3 and its two ends are slidably connected to the adjacent guide posts 3 respectively. The spring 4 is located below the movable plate 5. The movable plate 5 can move up and down along the length of the guide post 3.

[0043] The top plate 8 is hinged to the handle 9 at the middle position. The handle 9 is also hinged to the middle position of the upper surface of the moving plate 5 through the connecting rod 10. The handle 9 and the connecting rod 10 are also hinged. That is, the top plate 8 and the handle 9 are the first hinge point 13, the handle 9 and the connecting rod 10 are the second hinge point, and the connecting rod 10 and the moving plate 5 are the third hinge point. Thus, the moving plate 5 can be pressed down through the connecting rod 10 under the action of the handle 9, and the moving plate 5 can be moved up under the action of the spring 4.

[0044] Since the connecting rod 10 is hinged to the middle position of the moving plate 5, and springs 4 are installed at both ends of the moving plate 5, it can ensure that the force is evenly distributed during the up and down movement of the moving plate 5, thus avoiding the phenomenon of the moving plate 5 tilting.

[0045] like Figure 3 , Figure 5As shown, the movable plate 5 has a second mounting limiting groove and a positioning hole. The second mounting limiting groove and the positioning hole are arranged opposite to each other on both sides of the movable plate 5 and are both arranged along the length direction of the movable plate 5.

[0046] The second mounting limiting groove is a dovetail groove structure, located on the lower surface of the moving plate 5, and the top of the positioning rod 6 is inserted into the second mounting limiting groove; the positioning hole is a long strip hole structure that penetrates the moving plate 5 and is used for the installation of the limiting screw 7.

[0047] The side wall at the top of the positioning rod 6 extends outward to form a plate-shaped connecting part. The connecting part on the side wall of the positioning rod 6 is provided with a threaded hole that mates with the limiting screw 7. Thus, the positioning rod 6 can move along the length direction of the second mounting limiting groove to adjust its position on the moving plate 5. The position can be fixed by the engagement of the limiting screw 7 with the threaded hole, preventing the positioning rod 6 from sliding under force during the pressing process.

[0048] The upper surface of the connecting part on the positioning rod 6 is in close contact with the lower surface of the moving plate 5 to ensure that the positioning rod 6 does not tilt during movement.

[0049] The second mounting limiting groove is located directly above the first mounting limiting groove, so that the positioning rod 6 is located directly above the positioning support 2. To ensure the coaxiality between the positioning rod 6 and the positioning support 2, a first scale 11 is set on the moving plate 5 and a second scale 12 is set on the base 1 to ensure the accuracy of the position adjustment of the positioning rod 6 and the positioning support 2.

[0050] The inner diameter of the positioning rod 6 matches the outer diameter of the positioning support 2. The positioning support 2 is a cylindrical structure that can be inserted into the positioning rod 6. In actual use, the positioning rod 6 can be used to press and position the nut 17 while covering the screw hole, effectively preventing the problem of damage to the internal thread of the nut caused by welding spatter. There is no need to set other protective parts to protect the nut, which greatly simplifies the structure and reduces costs.

[0051] The single-sided gap between the positioning support 2 and the nut 17 hole diameter is 0.2mm, which can not only ensure the center distance dimension, but also avoid poor welding quality caused by the nut 17 being tilted, damage to the internal thread of the nut 17 caused by welding spatter, and failure to meet the welding strength and fall off under stress, resulting in abnormal noise or partial failure of some functions during vehicle operation. It not only has high production efficiency and stable product quality, but is also not affected by the worker's skill.

[0052] like Figure 5As shown, one end of the handle 9 is a pin hole, and the other end is a limit hook. The limit hook is mainly used to set the rotation angle of the handle 9. The connecting rod 10 consists of two connecting plates and a limit pin. The two connecting plates are fixedly connected together, and the limit pin is fixedly installed between the two connecting plates. With the cooperation between the limit hook and the limit pin, the rotation angle of the handle 9 can be limited, thereby limiting the downward movement distance of the moving plate 5 and avoiding the problem of the moving plate 5 moving upward due to excessive pressing force.

[0053] Example 2

[0054] In another typical embodiment of the present invention, a method for using a nut accessory welding positioning device is provided, as follows:

[0055] First, adjust the positioning device to its natural state (e.g., ...). Figure 3 As shown), the spring 4 provides support. By comparing the hole spacing of the accessory plate 16 with the first scale 11 and the second scale 12 on the moving plate 5 and the base 1, the center distance between the positioning support 2 and the positioning rod 6 can be quickly adjusted to achieve coaxial engagement between the positioning rod 6 and the positioning support 2. After the positioning rod 6 is adjusted to the correct position, the limit screw 7 is tightened to fix the positioning rod 6 and prevent the positioning rod 6 from moving freely left and right when the moving plate 5 moves up and down.

[0056] Then, place the accessory plate 16 and nut 17 onto the positioning support 2 in sequence, and adjust the positioning device to the clamping state (e.g., Figure 4 As shown), pull down the handle 9 and move the moving plate 5 to move the two positioning rods 6 downward through the first hinge point 13, the second hinge point 14, and the third hinge point 15, so that the two positioning rods 6 are coaxially engaged with the two positioning supports 2. The positioning rods 6 are used to press the nut 17 and the accessory spare plate 16 for welding operations.

[0057] Among them, the positioning device is adjusted to the clamping state (e.g. Figure 4 When the limit hook at the end of the handle 9 contacts the limit pin of the connecting rod 10, the cooperation between the limit hook and the limit pin effectively avoids the problem of the moving plate 5 moving upward due to excessive pressing force.

[0058] After the welding operation is completed, release the handle 9 and use the spring 4 to lift the moving plate 5, so that the welded nut accessory can be taken out as a whole. The spring 4 plays a supporting role, which makes it easier to place / remove the accessory spare plate 16 and nut 17 of the new energy bus, thus improving work efficiency.

[0059] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A welding positioning device for nut accessories, characterized in that, The device includes a base, a positioning support slidably mounted on the base, a bracket fixedly mounted on the base, and a movable plate slidably mounted on the bracket. The movable plate is located directly above the positioning support, and an adjustable positioning rod is installed at the bottom of the movable plate. There are two positioning rods and two positioning supports, which correspond one-to-one. A spring is fitted on the bracket to support the movable plate. The movable plate is hinged to a handle on the bracket via a connecting rod, so as to convert the circular motion of the handle into the vertical linear motion of the movable plate. The positioning support and the positioning rod can be moved to adjust their positions. The positioning device has strong overall adaptability and can assist in the processing of nuts and accessories with different hole spacings. The movable plate is provided with two oppositely arranged second mounting limiting grooves and positioning holes along its length. The second mounting limiting grooves are located on the lower surface of the movable plate, and the top of the positioning rod is inserted into the second mounting limiting grooves. The positioning holes are elongated holes for installing limiting screws. One end of the handle is a pin hole, and the other end is a limiting hook. A limiting pin that cooperates with the limiting hook is fixedly installed on the connecting rod to limit the rotation angle of the handle. The positioning rod has a hollow structure, and the positioning support has a cylindrical structure. The inner diameter of the positioning rod matches the outer diameter of the positioning support to press and position the nut while covering the screw hole.

2. The nut accessory welding positioning device according to claim 1, characterized in that, The upper surface of the base is provided with a first mounting limiting groove with a dovetail groove structure along its length, and a slider that matches the first mounting limiting groove is fixedly installed at the bottom of the positioning support.

3. The nut accessory welding positioning device according to claim 1, characterized in that, The bracket consists of two guide columns fixed on the base and a top plate connecting the tops of the two guide columns. Each guide column is fitted with a spring. The movable plate is located between the two guide columns and its two ends are slidably connected to the adjacent guide columns.

4. The nut accessory welding positioning device according to claim 3, characterized in that, The top plate is hinged to the handle at the middle position, and the handle is hinged to the middle position of the upper surface of the moving plate via a connecting rod. The handle and the connecting rod, as well as the connecting rod and the moving plate, are both hinged.

5. A nut accessory welding positioning device according to claim 1, characterized in that, The side wall at the top of the positioning rod extends outward to form a plate-shaped connecting part, and a threaded hole that mates with the limiting screw is provided on the connecting part.

6. A nut accessory welding positioning device according to claim 1, characterized in that, The clearance between the positioning support and the nut hole on one side is 0.2mm.

7. A method of using the nut accessory welding positioning device as described in any one of claims 1-6, characterized in that, Specifically as follows: Adjust the center distance between the positioning support and the positioning rod according to the hole spacing of the attachment plate. After the positioning rod is adjusted into place, tighten the limit screw. Place the accessory plate and nut on the positioning support in sequence, pull down the handle, and the moving plate will drive the two positioning rods to move downwards, so that the two positioning rods are coaxially engaged with the two positioning supports. Use the positioning rods to press the nut and accessory plate together for welding. After the welding operation is completed, release the handle, use the spring to lift the moving plate, and remove the welded nut accessory as a whole.

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