The packaging steel strip inside the template with the design of the template

Packaging steel strip in the design of the template to the template support binding steel band blade inside and outside the template must also have a certain strength and hardness, so as to avoid the stress generated when fracturing, and larger compression deformation. In addition, it also requires easy cutting and mechanical processing; To have better moistureproof property, in use process is out of shape not easily. At present, the steel strip die template materials, laminate with birch and hard to get together gas ethylene board two kinds. Because of birch laminate strength is far higher than that of hard PVC board, so the former is generally used for conventional type and model type steel band punching die, the latter is often used in die cutting knife type steel belt. The thickness of the template is proportional to the thickness of salt pieces, the greater the thickness of the blanking parts, the greater the thickness of the template used. The thickness of the template should be used as standard specification. The two on the mechanical properties of the template materials are shown in table 4 6. Template after sawing become within the template to the template. In the shape of the template should be consistent with steel band blade shape. The smallest trough margin of groove and the edge of the template cannot be too small, otherwise may split at the blanking process. The minimum chamfer margin for small steel tape punch, should not be less than 50 mm, large steel die should not be less than 100 mm. In order to make the steel belt press the blade into the template can be firmly fixed, and not easily also in used is loose, the strip blade thickness on the interference of a groove should be 0. About 2 mm; The groove after finishing, interference amount to 0. 08 - 0. 12 mm. Interference quantity is too small, easy to loose; Interference amount is too large, the pressure into the steel strip is not easy to keep the vertical, and make the template caused by prestressing and reduce the strength of the template.