Composite plate head
Composite plate head
The heating process of hot spinning of head is opposite to hot stamping, hot stamping is heated to over 900℃ in furnace and then moved to stamping machine for stamping and forming, its temperature is a process of cooling down constantly, usually the specification requires that the temperature of the final pressure is higher than 680℃, it is difficult to grasp and measure in the specific operation process, the reason is that the internal temperature is high and the shallow surface temperature is low, so it is often over the standard condition. Hot spinning is to spin after reaching the starting spinning temperature, and meanwhile continue to heat the head, so the temperature of the head rises slowly, which can ensure that the final spinning temperature reaches above the specified value.
Head is commonly used on pressure vessel, which is one of the commonly used blocking devices nowadays, composite plate shaped head supplier, in actual work, due to the different environment of use, so the head is made into different shapes. Many people will be curious, is the force suffered by different shapes of head in the work the same?
We see from the stress situation of head: the two-way stress of spherical head is the same, which is good for composite plate profiled head, and under the same P and D conditions, the stress on the spherical head is only half of the circumferential stress on the cylinder; the change of warp curvature of ellipsoidal head is smooth and continuous, so the stress is more uniformly distributed, and for the standard ellipsoidal head, under the same P and D conditions, the film stress of the head is numericaly the same, and the stress is more uniformly distributed. For standard ellipsoidal head, composite plate profiled head, under the same conditions of P and D, the film stress of the head is numerically equal to the circumferential stress in the cylinder. Therefore, the stress condition of ellipsoidal head is only second to hemispherical head and better than other heads.
5、Avoid dropping and scratching of the surface layer of the head.
6、Avoid touching with carbon structural steel immediately to prevent environmental pollution of iron ion.
7、No outdoor storage, prevent from rain.
8、Prevent mandatory loading welding. Detailed design to avoid binding ground stress is too large.
9, pressure testing of domestic water chlorine ion content can not exceed 25mg / L, immediately after the experiment to air dry.
10, stainless steel pickling can not use sulfuric acid and other recovery acid.
11, the strict implementation of the "capacity" requirements of the compound compatibility.