Factors of dimensional accuracy of metal stamping parts-hardware

Hardware tells you the factors that affect the dimensional accuracy of metal stamping parts. The dimensional accuracy of metal stamping parts refers to the difference between the actual size of the stamping part and the design size. The smaller the difference, the higher the accuracy. 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 part and the size of the die edge, the punching part and the punch edge The inconsistency of the mouth size affects the dimensional accuracy of the metal stamping parts. There are many factors that affect the dimensional accuracy of 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 finished, the size of the blanking part is reduced due to the elastic recovery of the material, while the size of the punching part 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, the size of the blanking piece increases due to the elastic recovery of the material, while the size of the punching piece decreases. The dimensional accuracy of metal 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 a smaller amount of elastic deformation, and the amount of elastic recovery after punching is also smaller, 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 part is low. When the thin material is blanked, the elastic arch and the elastic recovery are also large, so that the precision of the part is low. Need to know more, welcome to consult: