Production process of automobile safety belt end piece

Abstract

The invention discloses a production process of an automobile safety belt end piece, relates to the technical field of production of automobile safety belt end pieces, and aims to manufacture the automobile safety belt end piece with more reasonable structure and more excellent performance by optimizing the steps of stamping, stretching, chamfering, lettering, bending and the like. Firstly, a plate-shaped structure with one rectangular end and one oval end is formed through a stamping die, and hole sites are stamped; then, a boss is stretched out at the specific hole position through a stretching die; then chamfering the edge of the hole site, the edge of the boss and the surface of the metal plate by using a chamfering lettering die, and carving character marks; and finally, the bending part is bent through a bending die, and a bending angle of 45-60 degrees is formed. The structural strength and durability of the safety belt end piece are improved, the assembling convenience and flexibility are enhanced, and powerful guarantee is provided for the overall safety and reliability of an automobile safety belt system. The production process is clear in step and optimized in flow, and high quality and performance consistency of the product are ensured.

Description

Technical Field

[0001] The invention relates to the technical field of automobile safety belt end piece production, in particular to a production process of an automobile safety belt end piece. Background Art

[0002] In the highly sophisticated and safety-oriented automobile manufacturing industry, every detail carries a deep concern for the safety of passengers. Seat belt end pieces, as seemingly small but crucial components in the seat belt system, are directly related to whether the vehicle can effectively protect passengers from injury in the event of a collision. Traditionally, automobile seat belt end pieces are mostly made of simple metal sheets, formed through basic stamping and bending processes. Although this manufacturing method can meet the basic safety connection function, it is difficult to meet the increasingly high standards of the modern automotive industry and consumers' pursuit of high-quality life in terms of durability, ease of assembly and overall aesthetics.

[0003] By deeply analyzing the manufacturing process of traditional seat belt end pieces, it is not difficult to find its limitations. In the stamping process, traditional processes often only focus on forming basic connection holes, while ignoring the special treatment of stress concentration areas. Stress concentration, especially at the edges of holes, is a key area where metal parts are prone to wear and even fracture during long-term stress. The lack of optimization treatments such as chamfering makes these areas more prone to fatigue damage when subjected to frequent and high-intensity tension, thereby potentially weakening the overall safety of the seat belt system.

[0004] In addition, the single bending process of traditional seat belt end pieces is also a problem that cannot be ignored. Although right-angle bending is simple and easy, it greatly limits the assembly flexibility and adaptability of the end piece. Different car models and different assembly environments often have specific requirements for the shape, size and angle of seat belt end pieces. Right-angle bending is not only difficult to meet these diverse needs, but may also cause difficulties in the assembly process due to unreasonable bending angles, and even insufficient stability after assembly, affecting the normal use of seat belts and the safety protection of passengers.

[0005] Therefore, in order to improve the durability, assembly convenience and overall aesthetics of the automobile seat belt end piece, it is necessary to improve the existing production process and produce an automobile seat belt end piece with a more complex structure and better performance by optimizing the process flows of stamping, stretching, chamfering, engraving and bending.

[0006] The present invention is proposed in this context, and aims to solve the problems existing in the prior art through an innovative production process for an automobile safety belt end piece, and to provide an automobile safety belt end piece with a more reasonable structure and superior performance. Summary of the invention

[0007] To this end, the present invention provides a production process for an automobile safety belt end piece to solve the above-mentioned problems in the prior art.

[0008] In order to achieve the above object, the present invention provides the following technical solutions:

[0009] In a first aspect, a production process for an automobile safety belt end piece comprises the following steps:

[0010] S1: placing a sheet metal in a stamping die, stamping it into a plate-like structure with a rectangular end and an elliptical end, and stamping a hole position 1 and a hole position 2 on the plate-like structure to obtain a first-stage blank;

[0011] S2: placing the first-stage blank in a stretching die, stretching it at the position of hole position 2 to form a boss, and obtaining a second-stage blank;

[0012] S3: placing the two-stage blank in a chamfering and lettering mold, chamfering the edge of the hole position 1, the edge of the boss and the surface of the sheet metal to form chamfer 1, chamfer 2 and chamfer 3 respectively, and simultaneously engraving character marks on the sheet metal to form a three-stage blank;

[0013] S4: placing the three-stage blank in a bending die, bending a specific section of the sheet metal to form a bent portion, making the angle between the two ends of the sheet metal 45°-60°, and obtaining a finished automobile safety belt end piece.

[0014] Furthermore, the first hole is a round hole, and the second hole is an oblong hole.

[0015] Furthermore, the boss is integrally connected to the upper portion of the sheet metal and corresponds to the position of the second hole.

[0016] Furthermore, the character mark is arranged on the upper part of the sheet metal, in the area between the first hole position and the second hole position.

[0017] Furthermore, the bending portion is located in a section of the sheet metal, corresponding to a position between the character mark and the second hole position.

[0018] Furthermore, the chamfer one, chamfer two and chamfer three are respectively used to improve stress concentration on the hole one, the boss edge and the sheet metal surface.

[0019] Secondly, the automobile safety belt end piece manufactured according to the above-mentioned production process includes a sheet metal, one end of which is a rectangular structure and the other end is an elliptical structure, with hole position one and hole position two provided inside, a boss integrally connected to the upper part, and a chamfered edge with character markings and a bending portion, wherein the bending angle of the bending portion is 45°-60°.

[0020] Compared with the prior art, it has the following beneficial effects:

[0021] Compared with the prior art, the automobile safety belt end piece production process of the present invention realizes the effective dispersion of stress concentration on the edge of the hole and the edge of the boss by introducing a sophisticated chamfering process (specifically including chamfer one, chamfer two and chamfer three). This innovative design, based on a deep understanding and application of material mechanics, significantly improves the structural strength and durability of the safety belt end piece under complex mechanical environments. The chamfering process not only reduces stress concentration points, but also reduces friction and wear through smooth transitions, thereby extending the service life of the safety belt end piece and reducing the risk of wear and breakage caused by long-term use. This improvement not only improves the safety of the product, but also reduces the maintenance costs caused by replacing damaged parts, bringing tangible benefits to automobile manufacturers and consumers;

[0022] The production process of the present invention has clear steps and optimized processes. It uses advanced stamping, stretching, chamfering, lettering and bending molds. The design of these molds fully considers the fluidity and formability of the material, ensuring that each batch of seat belt end pieces produced has highly consistent quality and performance. This highly automated production method not only greatly improves production efficiency and shortens production cycles, but also effectively controls production costs by reducing scrap and rework rates. For automakers, this means faster response to market changes, stronger competitiveness, and higher profit margins;

[0023] The automobile safety belt end piece production process of the present invention not only solves the practical problems in the prior art, but also brings new ideas and directions to the entire automobile parts industry. It demonstrates the important role of process innovation in improving product performance, enhancing assembly convenience, improving production efficiency and promoting technological innovation. This innovative achievement will inspire more related companies and research institutions to invest in the research and development and improvement of automobile parts production processes, and promote the continuous innovation and upgrading of the entire industry. In the long run, this will help to improve the technical level and international competitiveness of the entire automobile manufacturing industry, and provide consumers with safer, more comfortable and efficient automobile products;

[0024] In summary, the automobile safety belt end piece production process of the present invention has shown significant beneficial effects in improving product performance, enhancing assembly convenience, improving production efficiency and promoting technological innovation. These improvements not only improve the safety and reliability of the automobile safety belt end piece itself, but also provide a more solid guarantee for the entire automobile safety belt system. Under the increasingly stringent automobile safety regulations and consumers' high requirements for safety performance, this innovative achievement undoubtedly has great practical significance and far-reaching historical significance. It is not only a microcosm of technological progress in the automobile manufacturing industry, but also a concrete manifestation of responsibility for the life safety of every passenger. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the implementation methods of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the implementation methods or the description of the prior art. Obviously, the drawings in the following description are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0026] The structures, proportions, sizes, etc. illustrated in this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with the technology. They are not used to limit the conditions under which the present invention can be implemented, and therefore have no substantial technical significance. Any structural modification, change in proportion or adjustment of size shall still fall within the scope of the technical contents disclosed in the present invention without affecting the effects and purposes that can be achieved by the present invention.

[0027] Figure 1 The present invention is a simplified flow chart of a production process of an automobile safety belt end piece.

[0028] Figure 2 The present invention is a schematic structural diagram of an end piece produced by a production process of an automobile safety belt end piece.

[0029] In the figure: 1, sheet metal; 2, hole position one; 3, hole position two; 4, boss; 5, chamfer one; 6, chamfer two; 7, chamfer three; 8, character mark; 9, bending part. DETAILED DESCRIPTION

[0030] The following is a description of the implementation of the present invention by specific embodiments. People familiar with the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] Example 1

[0032] like Figure 1 As shown, a production process of an automobile safety belt end piece in an embodiment of the first aspect of the present invention comprises the following steps:

[0033] S1. Stamping

[0034] First, the prepared sheet metal 1 is placed in a stamping die. The design of the stamping die must ensure that a plate-like structure with a rectangular end and an elliptical end can be formed. At the same time, the die must also have the function of stamping a hole 2 and a hole 3 on the plate-like structure. The hole 2 is set as a round hole for connecting with other parts of the seat belt; the hole 2 is set as an oblong hole for subsequent stretching. After the stamping process, a first-stage blank is obtained (stamping is one of the most commonly used methods in metal processing. It uses a die to apply external force to the metal sheet to cause it to undergo plastic deformation, thereby obtaining the desired shape and size. Parts. In this embodiment, the selection of sheet metal materials is crucial, and the strength, toughness and machinability of the material must be considered to ensure the safety performance of the final product. The design of the stamping die not only requires precise matching of the shape of the seat belt end piece (rectangular at one end and elliptical at the other end), but also requires precise control of the size and position of hole position one and hole position two, which places extremely high demands on the manufacturing accuracy of the mold. Hole position one is designed as a round hole to facilitate standardized connection with other parts of the seat belt (such as buckles or adjusters); the oblong hole design of hole position two reserves space for subsequent stretch forming, reflecting the close integration of design and process);

[0035] S2, stretch forming

[0036] The first-stage blank is placed in a stretching die. The design of the stretching die must ensure that the boss 4 can be stretched upward at the position of the second hole 3. The design of the boss 4 is intended to enhance the connection strength and assembly stability of the safety belt end piece. After stretching, the second-stage blank is obtained (stretching forming is a further process based on stamping forming, which aims to form a specific three-dimensional shape or characteristic structure, such as the boss in this example, through the stretching deformation of the local material. The design of the boss not only enhances the connection strength of the safety belt end piece, but also improves the stability during assembly to prevent loosening due to vibration or external force. The design of the stretching die requires accurate calculation of the material flow path and stretching ratio to avoid material rupture or excessive thinning).

[0037] S3, chamfering lettering

[0038] The second-stage blank is placed in a chamfering and lettering mold. The design of the chamfering and lettering mold must ensure that the edge of the hole position 2, the edge of the boss 4 and the surface of the sheet metal 1 can be chamfered to form chamfer 1 5, chamfer 2 6 and chamfer 3 7 respectively. The chamfering treatment is intended to disperse stress concentration and improve structural strength. At the same time, the mold must also have the function of engraving character marks 8 on the sheet metal 1. The character marks 8 can be used to trace the production batch or identify product information. After chamfering and lettering treatment, a three-stage blank is obtained (chamfering treatment is a common subsequent process in metal processing. It can not only beautify the appearance of the parts, but more importantly, it can disperse stress concentration and reduce the risk of fatigue damage of the parts during use. In this case, the chamfering treatment of the hole position 1, the boss and the surface of the sheet metal is optimized for different areas, reflecting the attention to details. The lettering process directly embosses the character mark on the part through the mold, which is not only convenient for production batch tracking and quality control, but also provides product information, enhances product traceability and brand recognition. The design of the lettering mold must ensure that the characters are clear and durable, and do not affect the overall structural strength of the part);

[0039] S4, Bending

[0040] The three-stage blank is placed in the bending die. The design of the bending die needs to ensure that a specific section of the sheet metal 1 can be bent to form a bending portion 9. The bending angle of the bending portion 9 is set to 45°-60°, which aims to optimize the assembly interface of the seat belt end piece and improve the stability and overall aesthetics after assembly. After bending, a finished automobile seat belt end piece is obtained (bending forming is a process of bending a metal sheet at a predetermined angle, which is crucial to improving the assembly interface of parts and enhancing overall aesthetics and stability. In this case, the design of the bending portion takes into account the assembly requirements of the seat belt end piece and the vehicle body structure. The bending angle of 45°-60° is the result of careful calculation, which aims to ensure stability after assembly and reduce assembly errors. The design of the bending die needs to ensure the consistency of the bending angle and the flatness of the parts, which places strict requirements on the rigidity and positioning accuracy of the die. In addition, the rebound phenomenon during the bending process is also a factor that must be considered, which needs to be controlled through die design or subsequent correction processes).

[0041] Example 2

[0042] like Figure 2 As shown, Figure 2The schematic diagram of the structure of the automobile safety belt end piece made according to Example 1 of the present invention is shown. In the figure, one end of the sheet metal 1 is a rectangular structure, and the other end is an elliptical structure; the hole position 1 2 and the hole position 2 3 are respectively located inside the sheet metal 1; the boss 4 is integrally connected to the upper part of the sheet metal 1 and corresponds to the position of the hole position 2 3; the chamfer 1 5, the chamfer 2 6 and the chamfer 3 7 are respectively arranged at the edge of the hole position 1 2, the edge of the boss 4 and the surface of the sheet metal 1; the character mark 8 is arranged at the upper part of the sheet metal 1, located in the area between the hole position 1 2 and the hole position 2 3; the bending part 9 is located in the section of the sheet metal 1, corresponding to the position between the character mark 8 and the hole position 2 3;

[0043] Combination Figure 2 From the schematic diagram of the automotive seat belt end piece structure shown in the figure, we can more intuitively understand the shaping of the product structure by the above production process. The combination of rectangular and elliptical structures not only meets the functional requirements of the seat belt end piece, but also gives it a unique visual effect. The precise layout of hole positions one and two ensures the effective connection and adjustment flexibility of the seat belt end piece with other components. The setting of the boss, as a measure to enhance the connection strength, is a direct reflection of the stretch forming process. The chamfering treatment not only beautifies the edge of the part, but also improves its structural strength. The engraving of the character mark provides a unique identity for the product. The ingenious design of the bending part optimizes the assembly interface and ensures the stable installation of the seat belt end piece on the vehicle.

[0044] Through the above embodiments, the production process of the automobile safety belt end piece of the present invention is described in detail. The process not only improves the performance and quality of the safety belt end piece, but also enhances the convenience and flexibility of assembly, providing a strong guarantee for the overall safety and reliability of the automobile safety belt system.

[0045] Although the present invention has been described in detail above by general description and specific embodiments, it is obvious to those skilled in the art that some modifications or improvements can be made to the present invention. Therefore, these modifications or improvements made without departing from the spirit of the present invention all belong to the scope of protection claimed by the present invention.

[0046] The terms such as "upper", "lower", "left", "right", "middle", etc. cited in this specification are only for the convenience of description and are not intended to limit the scope of implementation of the present invention. Changes or adjustments to their relative relationships should be regarded as within the scope of implementation of the present invention without substantially changing the technical content.

Claims

1. A production process for an automobile safety belt end piece, characterized in that: The following steps are involved: S1: placing a sheet metal (1) in a stamping die, stamping it into a plate-like structure with a rectangular end and an elliptical end, and stamping a hole position 1 (2) and a hole position 2 (3) on the plate-like structure to obtain a first-stage blank; S2: placing the first-stage blank in a stretching die, stretching it at the position of the second hole (3) to form a boss (4), thereby obtaining a second-stage blank; S3: placing the two-stage blank in a chamfering and lettering mold, chamfering the edge of the hole position 1 (2), the edge of the boss (4) and the surface of the sheet metal (1) to form chamfer 1 (5), chamfer 2 (6) and chamfer 3 (7), respectively, and simultaneously engraving a character mark (8) on the sheet metal (1) to form a three-stage blank; S4: placing the three-stage blank in a bending die, bending a specific section of the sheet metal (1) to form a bending portion (9), so that the angle between the two ends of the sheet metal (1) is 45°-60°, and obtaining a finished automobile safety belt end piece.

2. The production process of the automobile safety belt end piece according to claim 1, characterized in that: The hole position one (2) is a round hole, and the hole position two (3) is an oblong hole.

3. The production process of the automobile safety belt end piece according to claim 1, characterized in that: The boss (4) is integrally connected to the upper portion of the sheet metal (1) and corresponds to the position of the second hole (3).

4. The production process of the automobile safety belt end piece according to claim 1, characterized in that: The character mark (8) is arranged on the upper part of the sheet metal (1), in the area between the hole position 1 (2) and the hole position 2 (3).

5. The production process of the automobile safety belt end piece according to claim 1, characterized in that: The bending portion (9) is located in a section of the sheet metal (1), corresponding to a position between the character mark (8) and the second hole position (3).

6. The production process of the automobile safety belt end piece according to claim 1, characterized in that: The chamfer one (5), chamfer two (6) and chamfer three (7) are respectively used to improve the stress concentration conditions on the hole one (2), the edge of the boss (4) and the surface of the sheet metal (1).

7. An automobile safety belt end piece obtained by the production process according to any one of claims 1 to 6.

8. The vehicle safety belt end piece according to claim 7, characterized in that: The invention comprises a sheet metal (1), wherein one end of the sheet metal (1) is a rectangular structure and the other end is an elliptical structure, a hole position 1 (2) and a hole position 2 (3) are arranged inside, a boss (4) is integrally connected to the upper part, and the edge is provided with a chamfering treatment, a character mark (8) and a bending part (9), and the bending angle of the bending part (9) is 45°-60°.

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