Machining and forming method for stamping part with high offset at two ends

Abstract

The invention discloses a method for processing and forming a stamping part with high offset at two ends, which belongs to the technical field of stamping forming, and comprises the following steps of: rolling and preforming: inputting a raw material into a rolling production line, and performing plastic deformation on the material through a rolling process, the plastic deformation comprising forming a preforming contour matched with the height difference of the two ends of the stamping part on the side part of the material; and progressive die continuous stamping is conducted, specifically, the rolled and preformed material is continuously fed into a progressive die, a stamping part is formed through the progressive die continuous stamping process, and in the forming process, the two ends of the material form direct connecting parts without deformation in the height direction through the progressive die continuous stamping process. The machining and forming method for the stamping part with the high offset at the two ends has the remarkable advantages in the aspects of improving the material utilization rate, reducing waste materials, stabilizing connection, improving the reliability of a feeding system, guaranteeing the size precision, improving the production efficiency and the like, the traditional stamping technology is optimized, the production cost is reduced, and the machining and forming efficiency is improved. And the quality and the consistency of products are improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of stamping forming, and particularly relates to a processing and forming method for stamping parts with high step differences at both ends. Background Art

[0002] Progressive dies are a type of efficient stamping dies and are widely used in mass production in industries such as automotive, electronics, and household appliances. With the progress of machining technology, the introduction of automation technology, and the application of computer-aided design and manufacturing, the die design and manufacturing process has become more efficient and precise. At the same time, with the diversification of market demands, the design of progressive dies also pays more attention to customization and integration, and can achieve multi-functional integrated production to meet the personalized needs of different customers. Cost reduction has become the focus of common concern for customers and manufacturers.

[0003] Currently, when using a single continuous progressive die to process stamping products with high step differences, there are several problems and disadvantages. First, when a large height difference needs to be formed at both ends of the forming part 1, in order to ensure that the end of the forming part is always connected to the side part 2 of the material during the stamping forming process, a deformable connecting part 3 connecting the forming part and the side part must be formed beforehand. Please refer to Figures 1-3 . The design of the deformable connecting part needs to have both reliable connection and deformable characteristics, so a hollow frame structure is usually adopted. However, this design not only generates a large amount of waste during the forming process, increasing material waste, but also increases the difficulty of die design. The presence of the deformable connecting part limits the positioning accuracy of the stamping material to a certain extent, thereby affecting the smooth operation of the entire production line. Especially under the requirements of high-precision machining, this design not only increases the requirements for die accuracy but may also lead to instability during the stamping process, affecting the quality of the finished product.

[0004] In summary, although the single continuous progressive die process can meet the production requirements of stamping parts with high step differences to a certain extent, due to the design problems of its deformable connecting part, the waste generated, and the impact on positioning and conveying accuracy, the disadvantages and limitations of this process are relatively obvious when processing stamping products with high step differences. Summary of the Invention

[0005] Aiming at the problems of waste generation, increased die design complexity, and positioning accuracy caused by the design of the deformable connecting part when using a single continuous progressive die to process stamping products with high step differences, which in turn affect production efficiency and the quality of the finished product, the present invention provides a processing and forming method for stamping parts with high step differences at both ends.

[0006] The present invention is implemented as follows. A processing and forming method for stamping parts with high step differences at both ends, characterized by including the following steps:

[0007] S1. Roll pressing pre - forming: Input the raw material into the roll - pressing production line, and perform plastic deformation on the material through the roll - pressing process. The plastic deformation includes forming a pre - formed profile on the side of the material that matches the height difference at both ends of the stamping part.

[0008] S2. Progressive die continuous stamping: Continuously feed the material after roll - pressing pre - forming into the progressive die, and the stamping part is formed through the continuous stamping process of the progressive die. During this forming process, direct connection parts that do not produce deformation in the height direction are formed at both ends of the material through the continuous stamping process of the progressive die.

[0009] In the above technical solution, preferably, the progressive die continuous stamping process includes blanking, trimming, bending, and punching, and the direct connection part is formed through the blanking.

[0010] In the above technical solution, preferably, the outer side of the direct connection part is the side part, the inner side of the direct connection part is the forming part, and the direct connection part is a non - hollow strip - shaped structure connecting between the side part and the forming part.

[0011] The processing and forming method of the stamping part with high height difference at both ends proposed by the present invention has significant advantages and effects:

[0012] Through the roll - pressing pre - forming and progressive die continuous stamping processes of the present invention, the need for the connection part to adapt to height - difference deformation can be eliminated before progressive die stamping, thus eliminating the dependence on deformable connection parts. Through the design of the direct connection part, the connection between the forming part and the side part is more stable and reliable, and the direct connection part does not require a complex deformable structure, reducing waste generation, improving material utilization rate, and reducing production costs. Especially in mass production, the process advantages of the present invention can significantly improve the production efficiency of enterprises.

[0013] The design of the direct connection part makes the connection between the forming part and the side part more stable. Compared with the traditional variable connection method, the connection strength is higher and the reliability is stronger. The direct connection not only ensures the precise docking of components during stamping, thereby improving the yield and quality of products. The adoption of the direct connection method improves the stability and position accuracy of the progressive feed, and improves the stamping accuracy of materials.

[0014] The precise design of the progressive die of the present invention combined with the stable feeding system in the roll - pressing process can ensure that the stamping part maintains precise dimensions and shapes during the forming process. The roll - pressing pre - forming process provides a reliable basis for the subsequent progressive die stamping by precisely controlling the shape and thickness of the material, enabling the formed stamping part to meet strict dimensional requirements, thereby improving the quality and consistency of products.

[0015] In summary, the processing and forming method of the stamping part with high step difference at both ends of the present invention shows significant advantages in improving material utilization rate, reducing waste, stable connection, improving the reliability of the feeding system, ensuring dimensional accuracy, and enhancing production efficiency. It not only optimizes the traditional stamping process, reduces production costs, but also improves the quality and consistency of products. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a top view of the stamping part forming process in the prior art;

[0017] Figure 2 is a side view of the stamping part forming process in the prior art;

[0018] Figure 3 is a schematic diagram of the connection structure of the forming part, deformable connection part and side part in the prior art;

[0019] Figure 4 is a top view of the stamping part forming process in the present invention;

[0020] Figure 5 is a side view of the stamping part forming process in the present invention;

[0021] Figure 6 is a schematic diagram of the connection structure of the forming part, direct connection part and side part in the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] In order to make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below with reference to the embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0023] In order to solve the problems of waste generation, increased complexity of die design and positioning accuracy caused by the design of the deformable connection part when processing high step difference stamping products with a single continuous progressive die, the present invention specifically provides a processing and forming method for stamping parts with high step difference at both ends. In order to further illustrate the structure of the present invention, it is described in detail with reference to the accompanying drawings as follows:

[0024] Please refer to Figures 4-6 , a processing and forming method for stamping parts with high step difference at both ends, comprising the following steps:

[0025] S1. Roll preforming. In this process, the role of roll preforming is to perform preliminary plastic deformation on the raw material through the roll forming process to form a preformed profile that matches the height difference at both ends of the stamping part. Roll preforming can precisely control the shape of the material, making its two ends have a specific height difference, which is consistent with the structural requirements of the final stamping part. Through roll forming, the thickness, shape, and surface characteristics of the raw material can be precisely regulated, while ensuring the high efficiency and stability of the process. The key advantage of this process is that it can provide a shape preset for the straight connection part in the subsequent progressive die stamping.

[0026] Specifically, the raw material is input into the roll forming production line, and plastic deformation is performed on the material through the roll forming process. The plastic deformation includes forming a preformed profile on the side of the material that matches the height difference at both ends of the stamping part. The raw material is a metal sheet-shaped material. The roll forming process is a known processing method that applies pressure to the material through rotating rollers to cause plastic deformation or surface modification. This process can precisely control the thickness, shape, and surface characteristics of the material, and can achieve continuous production, with the advantages of high efficiency, stability, and low material loss. The preformed profile has a specific height difference to match the structural requirements at both ends of the final stamping part, and its shape can be stepped, gradually changing curved surface, etc. As known from the prior art, the formation of the preformed profile can be achieved by relying on roll profile design and pass distribution.

[0027] S2. Progressive die continuous stamping.

[0028] The material after roll preforming is continuously fed into the progressive die, and the stamping part is formed through the progressive die continuous stamping process. During this forming process, the two ends of the material form a direct connection part 4 that does not produce deformation in the height direction through the progressive die continuous stamping process. The progressive die continuous stamping process includes blanking, trimming, bending, and punching, and the direct connection part is formed by blanking. After the direct connection part is formed, the outside of the direct connection part is the side part 2, the inside of the direct connection part is the forming part 1, and the direct connection part is a non-perforated strip-shaped structure connecting between the side part and the forming part.

[0029] The progressive die continuous stamping process includes multiple processes such as blanking, trimming, bending, and punching, and each process is sequentially completed at different workstations. First, the material is blanked at the initial station of the progressive die. The side part, forming part, and direct connection part are formed in this process. The blanking forms the basic unit for the stamping part to be formed, and this basic unit is the forming part, which is connected between the side parts through the direct connection parts at both ends. During the formation of the direct connection part, blanking plays a key role. Next, the material enters the next station for trimming. The trimming process is used to remove the excess edge material to ensure that the edge of the stamping part is smooth and neat and meets the dimensional requirements of the design. Subsequently, it enters the bending process, which is used to bend the material into the required shape according to the design requirements of the stamping part. At this time, the edge of the forming part is usually subjected to bending processing to form appropriate angles and curvatures. The bending process often requires precise control of the bending angle and shape to ensure that the stamping part can meet the functional requirements during use. In the punching process, the formed part after bending is further processed to form the required hole positions and other details.

[0030] In each station after the direct connection part is formed, the outside of the direct connection part is the side part. The main function of the side part is for feeding and conveying. It undertakes the task of guiding the material movement during the production process to ensure that the material can be smoothly and stably conveyed to the next process during the entire stamping process. The shape and structure of the side part are usually designed to meet the requirements of the conveying system to ensure the positioning and conveying efficiency of the material. The inside of the direct connection part is the forming part, and the forming part will be gradually processed into the final stamping part in the subsequent trimming, bending, and punching processes. The design of the forming part usually requires precise dimensions and shapes to ensure that the formed stamping part can meet the assembly and functional requirements.

[0031] Finally, after a series of processes such as stamping, trimming, bending, and punching, the completed stamping part and the direct connection part are separated through the final cutting process. The cutting process disconnects the already formed stamping part from the remaining part of the direct connection part to obtain individual stamping parts.

[0032] The material is conveyed from the roll self-pressing preforming section of the existing automatic feeding and conveying mechanism to the progressive die continuous stamping section. The automatic feeding and conveying mechanism is an important equipment in modern manufacturing and is widely used in continuous production lines such as roll pressing and stamping to accurately and efficiently convey the material from one process to the next process.

[0033] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. A method for forming a stamping part with a high difference in height at both ends, characterized in that: The following steps are involved: S1. Rolling preforming: The raw materials are input into the rolling production line, and the materials are plastically deformed by the rolling process. The plastic deformation includes forming a preformed profile on the side of the material that matches the height difference between the two ends of the stamping part; S2. Progressive die continuous stamping: The material preformed by roller pressing is continuously fed into the progressive die, and the stamped parts are formed by the progressive die continuous stamping process. During this forming process, the two ends of the material are formed into direct connection parts without height deformation through the progressive die continuous stamping process.

2. The method for forming a stamping part with a high difference in height at both ends according to claim 1, characterized in that: The progressive die continuous stamping process includes blanking, trimming, bending and punching, and the direct connection part is formed by the blanking.

3. The method for forming a stamping part with a high difference in height at both ends according to claim 2, characterized in that: The outer side of the direct connection part is a side portion, the inner side of the direct connection part is a forming portion, and the direct connection part is a non-hollow strip-shaped structure connected between the side portion and the forming portion.

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