Selection principle of stamping die structure form

There are many types of stamping molds, which must be selected according to various factors such as the production batch, size, precision requirements, shape complexity, and production conditions of the stamping parts. The principle of selection is as follows: Determine whether to use simple mold or complex mold structure according to the production batch of metal stamping parts. Generally speaking, simple mold has a low life and low cost; while a complex mold has a long life and high cost. Therefore, when the number of stamping parts is small, simple molds are usually used, and on the contrary, a mold structure with a longer life should be used. Determine the precision level of the punching die according to the dimensional accuracy requirements of the stamping parts. When the dimensional accuracy and cross-sectional quality of the stamping parts are high, the precision punch structure should be used. For the stamping parts with general accuracy requirements, ordinary punching dies can be used. The precision of stamping parts punched out by the composite die is higher than that of the progressive die, and the progressive die is higher than that of the simple die. This is because when a simple mold is used to process a stamped part with multiple processes, it has to be positioned and deformed many times, and the accumulated error is relatively large, so the precision of the stamped part is low. When the progressive die is stamped, it is inevitable that there will be feeding and positioning errors, but the guide pin can be used to guide it, and its accuracy is also high. The composite die punches the workpiece at the same position of the die at one time, and there is no positioning error, so its punching accuracy is very high. Therefore, for the stamping parts with high precision requirements, most of them consider using the composite die. Choose the type of die according to equipment capabilities. For example, in the production of deep drawing parts, in the case of a double-action drawing press, it is relatively simple to select a double-action die structure. Some connectors in electronic products are produced on a general press, which not only requires multiple sets of molds, but also has low efficiency; if they are produced on a universal bending machine, the mold structure is simple and the production efficiency is high; according to the size and size of the stamping parts In general, large-scale stamping parts use simple molds in order to facilitate the manufacture of molds and simplify the mold structure; for small-scale stamping parts with complex shapes, for ease of production, composite molds or progressive molds are commonly used. For cylindrical parts with large output and small dimensions, such as semiconductor transistor casings, continuous deep drawing progressive molds should be used; mold types should be selected according to mold manufacturing capabilities and economy. When there is no ability to manufacture high-level molds, The simpler mold structure that is feasible and feasible should be designed as far as possible. And under the condition of considerable equipment and technical strength. In order to improve the life of the die and adapt to mass production, a more complex precision die structure should be selected; in short, when selecting a die mechanism, it should be considered from multiple aspects, after a comprehensive analysis and comparison, the selected die structure should be as reasonable as possible. Article source: Analysis of the process plan of U-shaped bending parts in metal stamping parts Previous: About the introduction of stamping parts accuracy, what are the influencing factors?