What are the effects of metal stamping parts size on precision?

Metal stamping parts Dimensional precision refers to the difference between the actual size of the stamping part and the design size. The smaller the difference, the higher the precision, the more precise. In an ideal situation, the size of the blanking piece is the same as the size of the die edge, and the size of the punching piece is the same as the die edge size. In fact, due to the certain elastic deformation of the workpiece due to the force during punching, after the punching, the workpiece will undergo elastic recovery, which will cause the size of the blanking piece and the size of the die edge, the punching piece and the punch edge The size of the mouth does not match, which affects the dimensional accuracy of the metal stamping parts. At the same time, there are many factors that can affect the dimensional accuracy of metal stamping parts, such as: blanking gap, die manufacturing accuracy, material properties and thickness, shape and size of stamping parts, etc. The main factor is the blanking gap. When the gap between the convex and concave dies is too large, the drawing effect of the material during the punching process is greater, so the drawing deformation is large. After the punching is completed, the size of the blanking piece is reduced due to the elastic recovery of the material, and the size of the punching piece is increased. When the gap is too small, compression deformation occurs due to the extrusion of the material by the convex and concave dies. After punching, due to the elastic recovery of the material, the size of the blanking piece increases, while the size of the punching piece decreases. The dimensional accuracy of stamping parts is also related to the nature and thickness of the material. Because the nature of the material directly determines the amount of elastic deformation of the sheet during the blanking process, softer materials have less elastic deformation, and the amount of elastic recovery after punching is also small, making the parts more accurate and harder. Material, the amount of elastic deformation is large, and the elastic recovery after punching is also large, so that the precision of the workpiece is low. When the thin material is punched, the elastic arching and the elastic recovery are also large, so that the precision of the workpiece is low. In addition, the dimensional accuracy is also related to the shape and size of the part. The larger the size of the part, the more complex the shape, the more difficult the mold manufacturing adjustment, the mold gap is not easy to ensure uniformity, so the larger the size deviation. The influence of the above factors on the dimensional accuracy of stamping parts is discussed under the premise of certain mold manufacturing accuracy. If the manufacturing accuracy of the die edge is low, the accuracy of the punched parts cannot be guaranteed. Therefore, the manufacturing tolerance of the knife edge size of the convex and concave molds should be determined according to the dimensional accuracy requirements of the workpiece. Dongguan Hardware Co., Ltd. is a 15-year-old manufacturer of precision stamping dies and precision hardware stamping. Professional stamping production of precision stamping parts, metal stamping parts, precision shrapnel, mobile phone shields and other precision hardware.