What are the requirements for making mold copper tubes?As the heart of continuous casting machine, the mould copper tube plays a self-evident role, and its man
What are the requirements for making mold copper tubes?
As the heart of continuous casting machine, the mould copper tube plays a self-evident role, and its manufacturing technology requires a high level. At present, most of the production of crystal copper tube using concave - convex die in horizontal or outdated press extrusion molding.
The key of mold copper tube manufacturing process is its fit with the mold. That is to say, the size of the cavity must be fully in line with the precision of the mold.
Factors affecting stickiness:
1. Appropriate wall thickness deformation. The inner surface of the mould copper tube cannot produce enough plastic deformation when the amount of deformation changes during extrusion deformation, and the copper tube is not coated. The larger the deformation, the greater the extrusion resistance, easy to straighten the formed tube wall. Therefore, it is very important to choose the amount of deformation of mould copper tube.
2. Eliminate the internal stress of copper tube forming. The cause of internal stress: in the extrusion deformation of copper tube with larger wall thickness, the amount of deformation on the inner and outer surfaces is different. The outer metal is elongated, the inner surface deformation is small or unchanged, and the stress in the tube is large. During subsequent processing, these internal stresses are released and the copper tube deforms. Therefore, technical measures should be adopted to eliminate internal stress in the process of mould copper tube forming
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