How much can the diameter limit of the precision small hole punching hole be made?

If you are looking for precision small hole punching with a processing diameter of less than 0.1 diameter, how to make a stamping die and how to solve the problem of easy breakage and easy damage of the die punch during small hole processing? The raw material is mostly stainless steel SUS316 304. The small hole punch of the stamping die is easy to break. How to keep the small hole punch not easy to break? What material punch is used? Based on years of experience, Precision has summarized the following points! There are many reasons why the punching needle is easy to break. It may be the cause of the punching needle itself, or the design defect of the mold. It may also be a series of problems such as the blanking material and so on. In fact, no matter what the problem is, we should solve the problem. The specific methods are similar to each factory. Foreign precision molds are generally loose, and the stripper plate is very tight. The material plate and the die must be inlaid with guide posts and guide sleeves. Slow wire is used for wire cutting. The male splint is 0.02~0.06mm on both sides, and the stripping plate is 0.01mm on both sides or even tightly matched. The domestic practice is somewhat different. Generally, the single side of the male splint is 0.005mm, and the single side of the stripper is 0.01mm. This is the gap when cutting with fast-moving wire; when using slow-moving wire, you can consider increasing it appropriately. If the punching needle is offset, it is necessary to make the punching needle as short as possible, the gap should be appropriate, the guide post should be larger, and the gap between the guide sleeve of the cavity and the die should not exceed 0.005mm on one side. The clearance of the stripper plate is smaller than that of the lower template, generally 0.005mm on both sides and 0.02mm on both sides of the male splint. The loose point does not matter. The punch should not be knocked in by force, just push it in by hand! It is best to get a mold base, so The guiding performance of the first needle is very good. The first needle needs to be tightly fixed and cannot be loosened. The second unloading plate gap is too large, and the punch needle cannot be guided. In addition, if the plate is thick, it can be strong if the punch needle breaks a little bit. It belongs to normal damage. It belongs to the normal repair cost. Therefore, at the beginning of the design of the mold, precision considers: 1> to ensure the accuracy of the mold, the rationality of the structure, to ensure the accuracy of material saving and small hole punching 2> to ensure the punching depth and the rationality of the straight cut. Ensure the stability of the small hole punching process. 3> Ensure the selection of mold material and the rationality of processing. The materials and processing methods of Japanese brands are selected. After handling, the mold can be produced smoothly. This not only solves the material cost for customers, but also improves the production cost and efficiency of small hole punching. Small holes, how to stamp them, and who can make precision small holes.. As shown in the figure, the quantity is large, the material is 4J42 iron-nickel alloy, the product thickness is 1.1mm, and the middle 4 holes are 1.17mm,