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Briefly introduce the shaping process characteristics of deep drawing parts in metal stamping parts

by:Fortuna     2021-03-04
Professional stamping parts processing manufacturers, customized sheet metal stamping parts, bending parts, copper and aluminum parts, etc., there are many stamping processes in the stamping process, today is the plastic process, let’s take a look at the deep drawing in the metal stamping parts The characteristics of the shaping process of the parts; 1. If the flange plane, bottom plane, side wall surface, etc. of the deep drawing metal stamping parts do not meet the specific shape requirements, or for the rounded corner radius of the cylinder wall and the bottom of the cylindrical drawing part, r< δ, or the fillet radius between the cylinder wall and the flange R<2δ, for rectangular metal stamping parts, if the fillet radius between the walls r3<3δ, the drawing parts should be shaped to meet the requirements of the stamping parts. (1) Shaping the cylinder wall of deep-drawn metal stamping parts For the shaping of straight-wall deep-drawn metal stamping parts, the negative gap deep-drawing shaping method is generally adopted. The gap between the convex and concave molds of the shaping die is Zu003d(0.9~0.95)δ, and the straight wall becomes slightly thinner during shaping. The shaping process is often combined with the last drawing process. At this time, the drawing coefficient should be larger. (2) Round corner shaping of deep-drawn metal stamping parts. The fillet includes the fillet at the root and bottom of the flange. If the diameter of the flange is 2 to 2.5 times larger than the diameter of the cylinder, the rounded corner area and its adjacent area are stretched in two directions during the shaping, and the thickness becomes thinner, so as to realize the rounded corner shaping. At this time, the tensile stress generated inside the material is uniform, and the deformation of the fillet area is equivalent to the bulging with little deformation, so the shaping effect is good and stable. The elongation of the material in the fillet area is preferably 2% to 5%. If it is too small, the tensile stress state is insufficient and uneven; if it is too large, cracks may occur. If the deformation and elongation of the rounded area exceeds the above-mentioned range value, the height of the punching piece before shaping is slightly greater than the height of the part to supplement the insufficient flow of the material and prevent the rounded area from bulging and breaking. The height of the metal stamping parts should not be too large, otherwise, because the area of u200bu200bthe stamping parts is greater than or equal to the area of u200bu200bthe parts, the fillet area will not be bulged and deformed, and the shaping effect will not be good. What's more, due to the excess material, large compressive stress is formed in the non-deformed area such as the cylinder wall, which makes the surface of the punching part unstable and wrinkles, which in turn deteriorates the quality. If the diameter of the flange is less than 2 to 2.5 times the diameter of the cylinder, the flange can shrink slightly when the rounded corner is reshaped to relieve the excessive elongation caused by the excessive change of the rounded corner, so the height dimension of the metal stamping part before reshaping Should be equal to the height dimension of the part. Article recommendation: Introduction to the shaping process of bending stamping parts Previous: Layout design of multi-station progressive die used in stamping parts processing
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