Modular design of punching and trimming components

[electromechanical] modular design of punching and trimming components of progressive die for automotive structural parts

with the development of domestic automotive market, enterprises are eager to improve the efficiency and quality of mold design. At present, some die CAD systems have been used to assist the progressive die design, but from the perspective of application effect, these systems have the problems of low integration, specialization and customization, which are difficult to meet the requirements of progressive die design for automotive structural parts. The reason is that due to the complex structure of automobile structural parts, the progressive dies that occupy the dominant position in China, Japan and South Korea usually include multi-channel stations such as punching, trimming, bending, forming, etc. Automobile structural parts refer to the load-bearing parts or load-bearing parts in the automobile, which are closely related to automobile safety. In the automobile body, many structural parts are installed on the nodes of the body structure and connected with other structural parts to form a deformation resistant high-strength frame. Due to the complex structure and high accuracy requirements of these parts, they are usually produced by multi station progressive die

although the progressive die for automotive structural parts has many advantages, such as high production efficiency, saving material costs, good product accuracy and so on, the combination of the structural characteristics of the progressive die and the complex forming process of automotive structural parts makes this kind of die complex in structure and size, which will produce zero drift and greatly improve the difficulty of die design and manufacturing. Of course, it takes three months or even longer for a pair of progressive dies for automotive structural parts to be designed and delivered, and it requires considerable development prospects for designing aviation aluminum materials. Only those who have accumulated rich design experience in practice can be competent. The analysis and calculation of the whole design process are complex and need to be revised repeatedly. The design work efficiency is low, which can not meet the requirements of the market for product upgrading

with the development of domestic automobile market, enterprises are eager to improve the efficiency and quality of mold design. At present, some die CAD systems have been used to assist the progressive die design, but from the perspective of application effect, these systems have the problems of low integration, specialization and customization, which are difficult to meet the requirements of progressive die design for automotive structural parts. The reason is that due to the complex structure of automobile structural parts, the corresponding progressive die usually includes multi-channel stations such as punching, trimming, bending, forming, etc. The working components composed of punch, female mold, standard parts, plate inserts and other parts are used to complete the corresponding processes at the length of each working reduction test grounding wire. The existing mold design system usually focuses on the design of individual parts and components. By providing a series of parts and components design tool sets, users can use them by themselves to assemble the required working components. Although this design idea reduces the coupling between the functions within the system, it also ignores the real relevance between the parts within the working assembly in the design process of progressive die

therefore, according to the design points of progressive dies for automotive structural parts, in view of the design difficulties of such dies and the shortcomings of the existing progressive die design system, a rapid generation and correlation method of progressive die working components is proposed, and a set of intelligent design and modification function module system of punching and trimming components of progressive dies for automotive structural parts based on NX platform is developed. The system has been put into use in enterprises and achieved good results

on the basis of analyzing the structural characteristics of progressive dies for automotive structural parts, sorting out the typical blanking structures and design principles of standard hole blanking, special-shaped hole blanking, trimming, tongue cutting and other processes, and comprehensively applying the global parameter management idea, parametric and modular design, rule-based reasoning, dynamic assembly and other technologies, the progressive die punching and trimming function module is developed on the Siemens NX 8.5 software platform. The module is divided into three parts: global parameter management tool, component rapid generation tool and component tool, as shown in the figure. Users first initialize the shared parameters in the component design process according to the global parameter management tool, then use the component rapid generation tool for structural variant design, and finally use the component tool to adjust and detail features