Leakage-proof detection clamp for seat cross beam mounting nut plate

Abstract

The utility model discloses a leak-proof detection clamp for a seat cross beam installation nut plate, and aims to solve the problem of welding omission of a nut plate assembly in the welding process of a seat cross beam. The clamp comprises a base, a clamp main body, a positioning part and an optical fiber sensing device, the base is installed on the workbench, and the clamp body is used for clamping and fixing the seat cross beam. The positioning part is provided with a welding positioning pin which is matched with a pin hole in the bottom of the nut plate assembly, and accurate positioning is achieved. And the optical fiber sensing device is mounted on the welding positioning pin, is electrically connected with the welding device and is used for detecting the existence of the nut plate assembly. And when the clamp clamps the seat cross beam and the optical fiber sensing device does not detect the nut plate assembly, the welding device stops working, so that the welding missing phenomenon is effectively avoided.

Description

Technical Field

[0001] This utility model relates to the field of automotive technology, and in particular to a leak-proof detection fixture for a seat crossbeam mounting nut plate. Background Technology

[0002] In the manufacturing process of automotive seats, the seat crossbeam, as a critical structural component, typically requires the installation of a nut plate assembly to facilitate subsequent fastening to other parts. Traditional installation methods involve manually or automatically installing the nut plate assembly to its predetermined position on the seat crossbeam, then clamping and securing the seat crossbeam to a worktable using fixtures, and finally, automatically welding the nut plate assembly to the seat crossbeam using a welding device. However, this process presents a significant quality control challenge: due to operational negligence, equipment malfunction, or poor material management, nut plate assemblies may sometimes be omitted from the seat crossbeam installation.

[0003] Such omissions not only lead to production line interruptions and increased rework costs, but more importantly, they can directly affect the safety and reliability of the final product. As a crucial safety component in automobiles, any structural defects in the seat can become potential safety hazards, threatening the lives of passengers. Therefore, effectively preventing incomplete welding of the nut plate assembly on the seat crossbeam has become a pressing technical problem for the automotive manufacturing industry.

[0004] While various testing methods and techniques have been applied to quality control in production lines, the inspection of whether the nut plate assembly on the seat crossbeam is properly installed often relies on manual visual inspection or simple mechanical checks. These methods are not only inefficient but also susceptible to human error, making it difficult to ensure accuracy and reliability. This is especially true on large-scale, high-efficiency automated production lines, where such inspection methods are even less able to meet quality control requirements. Utility Model Content

[0005] The purpose of this utility model is to provide a leak-proof detection fixture for the seat crossbeam mounting nut plate, which can effectively detect whether the nut plate assembly on the seat crossbeam is installed in place, and can stop the welding operation in time when a leak is found, thereby avoiding the occurrence of leak welding.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is: to provide a leak-proof detection fixture for a seat crossbeam mounting nut plate, the leak-proof detection fixture for the seat crossbeam mounting nut plate comprising:

[0007] A base, which is mounted on a workbench;

[0008] The clamp body is disposed on the base and is used to clamp and fix the seat crossbeam;

[0009] The positioning part is mounted on the base and includes a welded positioning pin, which engages with the pin hole at the bottom of the nut plate assembly on the seat crossbeam.

[0010] An optical fiber sensing device is disposed on the welding positioning pin and electrically connected to the welding device. The welding positioning pin is used to detect the nut plate assembly and control the operation of the welding device.

[0011] In one embodiment, the clamp body includes:

[0012] A lower clamping block is disposed on the base;

[0013] A telescopic mechanism, the main body of which is hinged to the base, and a telescopic rod is provided inside the telescopic mechanism;

[0014] The upper clamping block has one end hinged to the telescopic rod and is also hinged to the base; the upper clamping block and the lower clamping block cooperate to press the seat crossbeam together.

[0015] In one embodiment, the telescopic mechanism is a cylinder mechanism.

[0016] In one embodiment, the positioning part further includes a main positioning pin, which is disposed on the base and engages with a main positioning hole on the seat crossbeam.

[0017] In one embodiment, an alarm mechanism is further included, which is disposed on the base and electrically connected to the fiber optic sensing device.

[0018] In one embodiment, an upper clamping head is provided at the bottom of the upper clamping block, and a buffer pad is provided between the upper clamping head and the upper clamping block.

[0019] The above-described technical solutions in the embodiments of this utility model have at least the following technical effects or advantages:

[0020] This utility model provides a leak-proof detection fixture for a seat crossbeam mounting nut plate. The fixture body clamps and fixes the seat crossbeam, and a welding positioning pin is provided in the positioning part. When the fixture holds the seat crossbeam, the welding positioning pin must be inserted into the pin hole at the bottom of the nut plate assembly on the seat crossbeam. This design ensures that the fixture can only be fully positioned and ready for welding when the nut plate assembly is correctly installed. Combined with the use of a fiber optic sensing device, the presence or absence of the nut plate assembly can be detected in real time and accurately, thereby timely detection and prevention of missed welds before welding. Furthermore, the automated detection process replaces traditional manual visual inspection or simple mechanical inspection, greatly improving detection efficiency and reducing misjudgments and missed detections caused by human factors, thus enhancing the overall quality control level of the production line. This helps achieve the goal of zero-defect production and reduces rework and scrap rates. By avoiding quality incidents caused by missed welds, this application significantly reduces the additional costs incurred due to quality problems, including rework costs, repair costs, and brand reputation losses due to product recalls or customer complaints. At the same time, it improves the safety and reliability of the product, reduces potential safety risks, and protects the interests of consumers. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model, 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 some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 A schematic diagram of the anti-leakage detection fixture for the seat beam mounting nut plate provided in this embodiment of the utility model in the open state;

[0023] Figure 2 for Figure 1 A magnified view of a portion of point A in the middle;

[0024] Figure 3 A schematic diagram of the anti-leakage detection fixture for the seat crossbeam mounting nut plate provided in this embodiment of the utility model when clamping the seat crossbeam;

[0025] Figure 4 This is a schematic diagram of the structure of the seat crossbeam before the installation of the nut plate assembly, as provided in an embodiment of the present utility model.

[0026] Figure 5 This is a schematic diagram of the structure of the seat crossbeam after the installation of the nut plate assembly, which is provided in an embodiment of this utility model.

[0027] The labels for the various figures are as follows:

[0028] 1. Base; 2. Fixture body; 3. Positioning part; 4. Fiber optic sensing device; 5. Seat beam; 6. Nut plate assembly; 21. Lower clamping block; 22. Telescopic mechanism; 23. Upper clamping block; 31. Welded positioning pin; 32. Main positioning pin; 231. Upper chuck; 232. Buffer pad. Detailed Implementation

[0029] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0030] In the description of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0031] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0032] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between 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.

[0033] Please see Figures 1 to 3This application provides a leak-proof detection fixture for a seat crossbeam mounting nut plate, including a base 1, a fixture body 2, a positioning part 3, and an optical fiber sensing device 4. The base 1 is mounted on a workbench; the fixture body 2 is disposed on the base 1 and is used to clamp and fix the seat crossbeam 5; the positioning part 3 is mounted on the base 1 and includes a welding positioning pin 31, which engages with a pin hole at the bottom of the nut plate assembly 6 on the seat crossbeam 5; the optical fiber sensing device 4 is disposed on the welding positioning pin 31 and is electrically connected to a welding device. The welding positioning pin 31 is used to detect the nut plate assembly 6 and control the operation of the welding device.

[0034] In this embodiment, the seat crossbeam 5 is clamped and fixed using the fixture body 2, and a welding positioning pin 31 is provided in the positioning part 3. When the fixture in this application clamps the seat crossbeam 5, the welding positioning pin 31 is inserted into the pin hole at the bottom of the nut plate assembly 6 on the seat crossbeam 5. The upper end of the welding positioning pin 31 extends from the center hole of the nut plate assembly 6, positioning the nut plate assembly 6 and the seat crossbeam 5 (e.g., Figure 3 As shown, Figure 3 Only a portion of the seat crossbeam 5 is shown in the diagram. A fiber optic sensor 4 is installed on the welding positioning pin 31 to detect whether the nut plate assembly 6 is properly installed. When the nut plate assembly 6 is installed on the seat crossbeam 5, the fiber optic sensor 4 on the welding positioning pin 31 is blocked by the external nut plate assembly 6, allowing the fiber optic sensor 4 to identify the nut plate assembly 6. When the fiber optic sensor 4 detects that the nut plate assembly 6 is not installed on the seat crossbeam 5, it controls the welding device to stop welding to prevent incomplete welding.

[0035] In one embodiment, the clamp body 2 includes an upper clamping block 23, a telescopic mechanism 22, and a lower clamping block 21. The lower clamping block 21 is disposed on the base 1; the main body of the telescopic mechanism 22 is hinged to the base 1, and a telescopic rod is disposed inside the telescopic mechanism 22; one end of the upper clamping block 23 is hinged to the telescopic rod, and the upper clamping block 23 is hinged to the base 1; the upper clamping block 23 and the lower clamping block 21 cooperate to press the seat crossbeam 5. When it is necessary to clamp and fix the seat crossbeam 5, it is only necessary to extend the piston rod of the telescopic mechanism 22 (specifically, a cylinder or hydraulic cylinder, etc.) to push the upper clamping block 23 according to... Figure 1 As shown, rotate clockwise to press and fix the seat crossbeam 5 onto the lower clamping block 21, as shown. Figure 3 As shown.

[0036] In one embodiment, the positioning part 3 further includes a main positioning pin 32, which is disposed on the base 1 and engages with the main positioning hole on the seat crossbeam 5. By adding a main positioning pin 32 to the positioning part 3 based on the existing leak-proof detection fixture, this design achieves precise positioning of the seat crossbeam 5 on the fixture through a physical connection.

[0037] The introduction of the main locating pin 32 significantly improves the positioning and clamping accuracy of the seat beam 5 on the fixture. It ensures that the seat beam 5 is accurately and stably positioned in the predetermined position before welding, thereby avoiding problems such as welding deviations and incorrect installation positions of the nut plate assembly 6 caused by inaccurate positioning. This not only improves the processing quality of the product but also enhances the overall efficiency and stability of the production line.

[0038] In one embodiment, an alarm mechanism is also included, which is mounted on the base 1 and electrically connected to the fiber optic sensor 4. When the fiber optic sensor 4 detects that the nut plate assembly 6 is not installed on the seat crossbeam 5, it will immediately trigger the alarm mechanism and emit a clear alarm signal (such as sound, light, etc.) to remind the operator to pay attention and take appropriate measures.

[0039] The alarm system provides operators with an immediate and intuitive feedback mechanism. It draws operators' attention to problems as soon as they occur, preventing quality incidents and production delays caused by incomplete soldering. Simultaneously, it enhances the automated monitoring capabilities of the production line, improves quality control, and reduces the error rate caused by human factors.

[0040] In one embodiment, an upper chuck 231 is provided at the bottom of the upper clamping block 23, and a buffer pad 232 is provided between the upper chuck 231 and the upper clamping block 23. The elasticity of the buffer pad 232 reduces the clamping pressure of the clamp on the seat beam 5, preventing damage to the seat beam 5 during clamping. The introduction of the buffer pad 232 effectively protects the surface quality and structural integrity of the seat beam 5. It can reduce rigid contact and compression of the clamp on the seat beam 5 while ensuring clamping stability, avoiding defects such as scratches and deformation caused by excessive clamping force.

[0041] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A leak-proof detection fixture for a seat crossbeam mounting nut plate, characterized in that, The leak detection fixture for the seat beam mounting nut plate includes: A base, which is mounted on a workbench; The clamp body is disposed on the base and is used to clamp and fix the seat crossbeam; The positioning part is mounted on the base and includes a welded positioning pin, which engages with the pin hole at the bottom of the nut plate assembly on the seat crossbeam. An optical fiber sensing device is disposed on the welding positioning pin and electrically connected to the welding device. The welding positioning pin is used to detect the nut plate assembly and control the operation of the welding device.

2. The anti-leakage detection fixture for the seat beam mounting nut plate according to claim 1, characterized in that, The fixture body includes: A lower clamping block is disposed on the base; A telescopic mechanism, the main body of which is hinged to the base, and a telescopic rod is provided inside the telescopic mechanism; The upper clamping block has one end hinged to the telescopic rod and is also hinged to the base; the upper clamping block and the lower clamping block cooperate to press the seat crossbeam together.

3. The leak-proof detection fixture for the seat beam mounting nut plate according to claim 2, characterized in that: The telescopic mechanism is a cylinder mechanism.

4. The leak-proof detection fixture for the seat crossbeam mounting nut plate according to claim 1, characterized in that: The positioning part also includes a main positioning pin, which is disposed on the base and is engaged with the main positioning hole on the seat crossbeam.

5. The leak-proof detection fixture for the seat crossbeam mounting nut plate according to claim 1, characterized in that: It also includes an alarm mechanism, which is mounted on the base and electrically connected to the fiber optic sensing device.

6. The leak-proof detection fixture for the seat crossbeam mounting nut plate according to claim 2, characterized in that: The bottom of the upper clamping block is provided with an upper chuck, and a buffer pad is provided between the upper chuck and the upper clamping block.

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