Small color angle and burr, a model section taper, and a related,

　　

　　

　　AS A Result, The Quality of the Blanked Parts Can be satisFactorily Achieved, as Shown in the Figure Below.

　　. 2.3-2). By Doing so, the upper and lower cracks will not be heavier than one line.

　　

　　

　　

　　Curve of the Blanked Part REVEALS that the tensile deformation of the deformed metal also increase to the increase in tensile stress at the deformedrea.

　　State to a Compressive state.after blanking, The Compressesed Metal Will RecoVER ites Elasticity, Causion The size of the Blanking Punch to be larger than the size of the die edge.

　　DIE itset.

　　Then, then

　　As the gap increases, due to the reduced elastic recovery of the material, the punched part size increases and the blanked part size decreases, making it easier to unload the material from the punch or push out the parts from the die opening.Typically, when the gap (on one side) increases to 10% to 20% of the material thickness, the unloading force is close to zero.Practical experience has shown that among the many factors affecting die life, the blanking clearance is the most important.

　　During the blanking process, intense friction occurs between the punch and the punched hole and between the die and the blanked part. The smaller the gap, the more severe the friction, which is extremely detrimental to the service life of the die.However, a larger clearance will reduce the friction between the edge of the punch and the die and the material, and can mitigate the adverse effects of uneven clearance caused by manufacturing and installation errors of the die, thereby improving its service life.The term 鈥渞easonable gap鈥?refers to a gap that allows for satisfactory workpiece section quality, high dimensional accuracy, minimizes the blanking force (unloading force and pushing force), and results in a long service life for the die when used for blanking.

　　The Gap Based on the Specific Requirements of the Parts and Production, Following The Following Principles.

　　Wear During use, who will increase the cutting edge gap. The cutting edge size should be calculated base on the minimum gap value.