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B820 Standard Test Method for Bend Test for Determining the Formability of Copper and Copper Alloy Strip

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B820 Standard Test Method for Bend Test for Determining the Formability of Copper and Copper Alloy Strip
Descrição: 5.1 This bend test provides information as to the formability or the ability of copper and copper alloy strip to resist cracking when being formed. 5.2 This test method can be used as a quality control tool to determine if material will form to a given radius. 5.3 This test method is also useful in research and development to provide data for use in selecting a spring material that will safely form to the geometry of a given part. 5.3.1 The forming characteristic of interest is the smallest bend radius that can be formed without cracks or otherwise unacceptable surface conditions (8.4). This radius, R, is the radius of curvature of the nose of the punch used in the test. 5.3.2 In addition, the difference between the angle of the bend after testing and 90° provides a measure of post-forming springback. 5.4 The results are suitable for direct application in design and manufacturing, only when all factors such as the geometry of the part, punch and die design, lubrication, stamping speed, and other material properties are known.
Data de criação/publicação: 2023
Idioma: Inglês

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