Stamping parts are widely used, including automotive, medical, electronics and other industries. Stamping factories are very important when processing high-quality stamping parts. During the stamping process, many defects will appear on the surface of the product. In the processing of stamping parts, problems such as impact lines, slip lines, collapse, dents, surface deformation, etc. sometimes occur. For stamping parts, no external surface defects are allowed. So what caused these surface defects? Next, Dongguan Fortuna will analyze it for everyone. Stamping1. The impact line and slip line are mainly the collapse and dent caused by the friction between the material and the mold during the stamping process.2. The surface deformation is mainly due to insufficient deformation of the stamping parts, small local material strain, and defects after the external force is released. So how to remove these defects?1. In order to remove the impact line, you can increase the drawing depth and change the blanking surface by changing the stamping angle, die angle, etc.2. To remove the slippage, you can change the product shape (left and right symmetry), increase resistance, etc.3. In order to remove the collapse and surface deformation, the stress gradient level generated by the part in the deformation zone should be understood, and the uniformity of the plastic deformation of the product should be ensured as much as possible. At the same time, by increasing the resistance, increasing the local shape strain and other means.With the development and application of CAE simulation technology, more and more defects can be found in the simulation. For example, through the tangential displacement field of forming, the flow of material can be understood, which can provide help for better solving the defects generated in the forming process of stamping parts.
With the development of society, metal stamping parts of various materials have been popularized in all walks of life. For stamping processing plants, some technical requirements need to be met in the processing and production of stamping parts. Dongguan Fortuna has been engaged in customized processing services for precision stamping parts for nearly 20 years, and summarized the following technical requirements for your reference. 1. The shape and size of the stamping parts need to comply with the product drawings and technical documents of the stamping parts;2. The surface quality requirements of stamping parts should be consistent with the plates used;3. In the forming process, under the premise of not affecting the next process and the required quality, slight fluffing and small surface unevenness are allowed.4. Stamping parts that have been punched or stamped generally have burrs, and the allowable height of burrs can be controlled according to the provisions of "Burr Height of Stamping Parts";5. Punching conditions are generally not specified;6. After stamping, forming and welding, stamped parts usually do not undergo heat treatment;7. The supply of stamping parts should ensure that its quality meets the stamping product drawings, inspection cards and rust prevention requirements; at least 15 days of rust prevention time should be guaranteed in the factory;
In order to make metal stamping parts beautiful and prevent corrosion, stamping parts manufacturers usually choose to galvanize the surface of the product. The application fields of electro-galvanization are very wide, including machinery manufacturing, 3C electronics, precision instruments, chemical industry, medical industry, aerospace and so on. In the actual production process of the stamping plant, what factors will affect the quality of electrogalvanized? Dongguan Fortuna will give you a specific analysis.Metal stamping parts1. The surface of metal stamping parts is not thoroughly cleaned, and a curing film is formed on the surface of the stamping parts, which affects the normal deposition of electro-galvanized parts.2. The carbon content of stamping parts is high. High carbon steel and cast iron parts will reduce the hydrogen precipitation potential, accelerate the hydrogen precipitation on the surface of the workpiece, and reduce the efficiency of electroplating.3. The stamping parts are bound too tightly, and part of the surface is not electroplated in place during the galvanizing process4. The content of additives in the zinc plating solution is low. If the additive content is low, it will affect the zinc dispersibility, and the coating will appear too thin in some parts.5. Surface corrosion will also reduce the hydrogen precipitation potential, the hydrogen precipitation on the surface of the stamping parts is accelerated, the current efficiency is reduced, and the deposition rate of zinc is affected.6. Low sodium hydroxide content. If the content of sodium hydroxide is low, the current density will decrease and anodic passivation will occur.7. Anode passivation will reduce the effective area, thereby affecting the normal distribution of current.
With the development of society, stamping products have been applied to various fields. Because the materials used in metal stamping parts are also divided into many types, when producing metal stamping parts in a stamping processing plant, we need to understand the characteristics of the product and the performance of the material. Among them, material hardness is a very important point. Different materials have different hardness test methods. Next, Dongguan Fortuna will analyze the hardness test methods of different materials for everyone.Precision stamping parts1. Hot rolled steel sheets are usually thick. It is generally stipulated that the Brinell hardness tester is used to test the hardness, and the Rockwell hardness tester can also be used to test the hot-rolled steel plate. When using a portable Rockwell hardness tester to test hot-rolled steel plates, the hrb scale can be used. The test can be carried out without sampling and the operation is very simple.2. The cold-rolled steel plate used for processing metal stamping parts mainly uses Rockwell hardness tester to test the hardness, usually using the hrb scale, and the harder one using the hrc scale.3. The material of the sheet material can use the vickers hardness tester, or the surface Rockwell hardness tester hrn or hrt scale.4. The hardness of the brass plate used for processing metal stamping parts can be tested with the hrb scale of the Rockwell hardness tester; the hrf scale of the softer brass plate and the red copper plate.5. A vickers hardness tester can be used to test aluminum alloy plates used to process metal stampings. When the material thickness is 13mm, a Barcol hardness tester can be used. Busbar hardness tester should be used for pure aluminum plate or low-hardness aluminum alloy plate.