Method of molding the head of a liquefied petroleum gas storage tank
Method of molding the head of a liquefied petroleum gas storage tank
According to the manufacturing method, the head of LPG storage tank can be formed as a whole and welded as a whole after forming in pieces. When the diameter of the head is large and the production capacity is exceeded, the manufacturing method of chip forming is often adopted. For the head size and shape of the overall forming, although easy to control, it generally needs a press or a large spinning equipment with a large stamping die, the process equipment is huge, and the manufacturing cost is high.
From the head forming, there are cold pressing, hot pressing and spinning forming. For the thin wall thickness of the head, the general use of cold pressing.
In order not to destroy the mechanical properties of the steel plate in the condition of quenching and quenching, and to save the cost of making the mold, the head or head flap made of quenching and quenching steel plate is often made by multi-point cold pressing.
When the head thickness is large, the head blank is heated to 900℃ ~ 1000℃ by hot pressing. At this time, for some materials (such as normalizing steel plate), due to the change of the mechanical properties of the original state, in order to restore and improve its mechanical properties, after the head stamping also need to do normalizing, normalizing + tempering or quenching + tempering, the corresponding heat treatment. For the head with large diameter and thin thickness, spinning forming is the most economical and reasonable choice.Prev News：>
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