Causes and preventive measures of wall cracking of metal tensile parts

Along with the development trend of social development, stamping products have already developed trends to all walks of life, so in the metal drawing parts, what is the reason for the wall of the drawing parts to be cracked? How to prevent it? Precision, concentrate on the customized production and processing of precision metal drawing parts for more than 10 years, and have accumulated a wealth of work experience in the drawing production and processing level. Let the author analyze for you below. 1. There are several reasons for wall cracking in the drawing process: 1. The axial tensile stress that the raw material bears during deep drawing cannot be very large; 2. The fillet of the cavity is likely to be very small; 3. Poor wetting during deep drawing; 4. The plastic deformation of the applied raw materials is relatively poor. 5. It is related to the compressive strength of the force transmission area of u200bu200bthe cylinder wall. 6. It is related to the tensile stress in the force transmission area of u200bu200bthe cylinder wall. 7. When the tensile stress of the cylinder wall exceeds the compressive strength of the raw material of the cylinder wall, the metal drawing parts will be in The tangent line between the rounded corner of the bottom end and the circle of the cylinder wall one by one caused a 'risk cross section' to cause cracks. 2. Preventive measures for hardware drawing parts: 1. Reduce the edge band width; 2. Slightly increase the radius of the die fillet; 3. Appropriate use of lubricating fluid in the production and processing; 4. Use raw materials with good plastic deformation or upgrade Workshop quenching process. 5. Improve the compressive strength of the cylinder wall according to the physical properties of the improved raw materials; 6. According to the appropriate drawing process and design plan, the grinding tool should be formulated to effectively clarify the drawing deformation level, the concave die fillet half-warp, and the standard lubrication can be effectively improved. Etc., in order to reduce the tensile stress in the force transmission area of u200bu200bthe cylinder wall. [Related recommendation] Learn more: What are the methods for polishing the surface of stainless steel? Learn more: Manufacturing characteristics of automobile stamping parts molds Learn more: Points to note in the design of continuous stamping dies (2)