Needle punch、Double section thimble、Mould Manager、Die pin、Flat thimble supplier

The stamping of stainless steel products is the most troublesome problem in metal stamping dies. The technical aspects are still being discussed, continuously improved, and accumulated knowledge and experience. Sudden problems will be encountered in the production process. For example, broken needles and burrs. All the bad phenomena of production and processing can be analyzed by human, machine, material, method, and environment. First, we can exclude people (human factors), machine (machine tool performance and parameters), and environment (environment).　

Let’s take a look at the materials (raw materials, including punching needle materials and product materials here). Stainless steel is relatively hard, and punching needles are often broken in stainless steel materials. According to the harder characteristics of stainless steel, we must choose not only high hardness, Wear-resistant and tough materials, our company solves the problem of stainless steel punching and easy-breaking punches. Usually the punch raw materials are used as ASP-23 punching needles plus plating HRC64-65. The surface finish of the titanium-plated punching needles is good. Reduce the friction between the mold and the viscosity. If you have no conditions to buy this material, you can choose SKH-9, HRC60 is more suitable.

In the case of the mold material, there must be a correct method. From the perspective of law, the first is a gap problem. The knife edge gap is also one of the reasons for the fragility of the punching stainless steel punch. The 1.9 thick stainless steel knife edge The gap should be 0.25-0.3 on both sides. Secondly, we need to analyze the clamping method of the punching needle. Usually we will hook the tail of the punch, the diameter is greater than 4.5, about 1mm on one side, and the height is 5mm. This method is no problem for punching ordinary materials, but for stainless steel The phenomenon of broken punch needle appears here. One is the vibration force during punching, and the other is the pulling force during stripping. This fixing method cannot meet the requirements. It must be strengthened at the position of the punch fixing plate and the hook It is made on the plane under the fixed plate to increase the volume of the punch subject to vibration or tension to solve the problem.