Sheet metal machinery and test methods


The mechanical behavior of metal is very important when […]

The mechanical behavior of metal is very important when making sheet metal products. The basic section of metal forming provides information on this topic. Often an ideal property metal is a large plastic deformation before constriction. When necked metal, diffuse neck better than local neck. The high total elongation of the material before fracture is also desirable for sheet metal forming in sheet metal processing. Impurities affect the performance and surface finish of metals.
In addition to the standard tests on materials (such as tensile tests), there are also some tests specifically designed to determine the formability of sheet metal. A common test is cupping test. A specimen is held in a circular cavity and a steel ball is pressed into the specimen until the material breaks. Larger pieces of metal can fracture the plastic deformation distance, the larger the sheet formability.
Anisotropy is an important factor in the formation of metal sheets. Anisotropic mechanical properties of the directional changes. In other words, the material applies a different reaction, applying a stress that applies the same stress in one direction than it does in a different direction. If a table is isotropic, then its properties are the same in any direction. Sudden test can be used to determine the anisotropy. The flakes are isotropic if the breakage due to the applied force is circular through the circular ball. If there is a straight fracture, this means that the sheet is anisotropic.
Many sheet metal businesses will create a complex distribution of forces. Material Elements Experience the stress and strain of a two-way bridge depending on the amount and proportion of their position at work. Sometimes a piece of metal is tested within a range of different two-way axial forces. Mesh and inscribed circle printed on specimen. Mesh and circle will be deformed metal.
Testing can be performed to determine the metal's response, different combinations of biaxial strains. The combination of primary and secondary, (both directions) faults and safe areas can be established. Forming limit graphs can be created to graphically display this information. Forming limit map sheet metal processing sheet metal manufacturers provide a useful reference.