Latest products
Adaptability of packaging steel strip blanking gap to material thickness
by：Hongmei
2021-03-15
Adaptability of packaging steel strip blanking gap to material thickness
Sheets of different thicknesses and different materials are required to have a reasonable gap in the stamping process. However, for the same thickness of the same material, the gap value is not a fixed value, but a range is allowed, namely the maximum gap and the minimum gap. For example, for materials with medium hardness, the gap is 9-12% of the material thickness; when stamping 0.5 mm silicon steel sheets, generally 0.04-0.06 mm (double gap). However, when the gap is 0.01 or 0.08 mm, as long as the gap is uniform when assembling the convex and concave molds, the quality of the blanking parts can also be guaranteed. It is usually said that the 0.01 mm gap is selected as a small gap at this time, and 0.08 mm is a large gap. If the gap value is too large or too small, it will affect the dimensional accuracy, section quality and blanking force of the part. If there are no strict requirements for the small change in the size of the part and the section texture, the variable gap of the general die can be used. The characteristics of this product, expand its application range, and complete the stamping of parts with little difference in thickness through a set of die tools. For example, for a metal sheet with a thickness in the range of 0.5-2 mm, the gap value can be selected according to the original material of 1.2 mm (0.108-0.156), that is, when the thickness of 0.5 mm is punched, it is a large gap, and the thickness of punching is 2 mm. When it is a small gap. If this set of molds is used to punch glass fiber insulation cloth with a thickness of 0.1 mm, it can also be placed in multiple layers at a time for punching processing. In short, under the premise of meeting product requirements, the above methods are allowed and applicable. If the quality of the punching parts is required to be strict, it is necessary to replace the convex and concave dies of different sizes to combine and adjust the best reasonable clearance. This method is also often used for gap tests of new materials.
It should be pointed out that the general-purpose die is universal within a certain material thickness range (usually 0.5-2 mm). If the material is too thin and the gap is too small, the manufacturing precision of the mold is required to be high, and manufacturing is also difficult; if the material is too thick, the mold structure must have a certain strength to avoid damage to the mold. Generally, steel letters are used to mark the allowable material thickness range on general molds to protect the mold from damage due to improper use.
Sheets of different thicknesses and different materials are required to have a reasonable gap in the stamping process. However, for the same thickness of the same material, the gap value is not a fixed value, but a range is allowed, namely the maximum gap and the minimum gap. For example, for materials with medium hardness, the gap is 9-12% of the material thickness; when stamping 0.5 mm silicon steel sheets, generally 0.04-0.06 mm (double gap). However, when the gap is 0.01 or 0.08 mm, as long as the gap is uniform when assembling the convex and concave molds, the quality of the blanking parts can also be guaranteed. It is usually said that the 0.01 mm gap is selected as a small gap at this time, and 0.08 mm is a large gap. If the gap value is too large or too small, it will affect the dimensional accuracy, section quality and blanking force of the part. If there are no strict requirements for the small change in the size of the part and the section texture, the variable gap of the general die can be used. The characteristics of this product, expand its application range, and complete the stamping of parts with little difference in thickness through a set of die tools. For example, for a metal sheet with a thickness in the range of 0.5-2 mm, the gap value can be selected according to the original material of 1.2 mm (0.108-0.156), that is, when the thickness of 0.5 mm is punched, it is a large gap, and the thickness of punching is 2 mm. When it is a small gap. If this set of molds is used to punch glass fiber insulation cloth with a thickness of 0.1 mm, it can also be placed in multiple layers at a time for punching processing. In short, under the premise of meeting product requirements, the above methods are allowed and applicable. If the quality of the punching parts is required to be strict, it is necessary to replace the convex and concave dies of different sizes to combine and adjust the best reasonable clearance. This method is also often used for gap tests of new materials.
It should be pointed out that the general-purpose die is universal within a certain material thickness range (usually 0.5-2 mm). If the material is too thin and the gap is too small, the manufacturing precision of the mold is required to be high, and manufacturing is also difficult; if the material is too thick, the mold structure must have a certain strength to avoid damage to the mold. Generally, steel letters are used to mark the allowable material thickness range on general molds to protect the mold from damage due to improper use.
