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Correction of perforated mesh defects

Categories:MESH&NETTING
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Time of issue:2023-02-16
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(Summary description) During punching, due to uneven anvil surface, skew of both ends of the punch and uneven heating of the blank, the hole diameter will be eccentric.

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Correction of perforated mesh defects

(Summary description) During punching, due to uneven anvil surface, skew of both ends of the punch and uneven heating of the blank, the hole diameter will be eccentric.

Categories:MESH&NETTING
Author:
Origin:
Time of issue:2023-02-16
Views:0

Information

(1) Correction of eccentricity during punching: During punching, due to uneven anvil surface, skew of both ends of the punch and uneven heating of the blank, the hole diameter will be eccentric. The correction method can be carried out by the water immersion method: during operation, the thin side of the hole wall is immersed in water to reduce the temperature, and then the hole is expanded with a punch. The thickness is uniform and the eccentricity is corrected. This method is suitable for plastic materials.

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(2) The blank is aliased during punching. That is, the metal under the punch is extruded around, the height of the blank is reduced, the diameter is increased, the upper end face is concave, and the lower end face is convex. The degree of aliasing is related to the dimensions of the blank diameter D0, height H0 and hole diameter d1 before punching. The smaller D0/d1, the more serious the degree of aliasing. The correction method is: it is better to control D0/d1 ≥ 2.5~3. If the diameter of the punched hole is large, such as when D0/dl<2.5, the small hole is generally punched first, and then the hole is expanded to obtain the required hole diameter.

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Next: Characteristics of Hexagonal Mesh