In addition to using steel pipes as raw materials to produce reducers, eccentric reducers can also be produced by stamping steel plates for some specifications of reducers. The shape of the punch used for drawing refers to the design of the inner surface of the reducer, and the punching die The blanked steel plate is stamped and stretched.
The eccentric reducer is expressed by multiplying the diameter of the large head by the diameter of the small head and the thickness.
Eccentric reducer standard: national standard, American standard, British standard and various non-standard high-pressure stamping.
The reduction forming process of the eccentric reducer is to put a tube blank with the same diameter as the large end of the reducer into a forming die, and press in the axial direction of the tube blank to move the metal along the mold cavity and shrink into shape. The size of the diameter of the diameter pipe is divided into one-time press forming or multiple press forming.
The strength is significantly higher than that of carbon steel with the same amount of carbon, and it has better toughness and plasticity, as well as good weldability and corrosion resistance.
Reducing pipe (small and small head) is a kind of pipe fittings used for pipe diameter reduction. The commonly used forming process is reducing diameter pressing, expanding diameter pressing or reducing diameter plus expanding diameter pressing, and stamping forming can also be used for reducing diameter pipes of certain specifications.
The reducing forming process of the reducer is to put a tube blank with the same diameter as the large end of the reducer into a forming die, and press it along the axial direction of the tube blank to move the metal along the mold cavity and shrink into shape. According to the size of the reducing diameter of the reducer, it is divided into one-time press forming or multiple press forming. The figure below is a schematic diagram of the reduced diameter forming of the concentric reducer.
Diameter expansion forming is to use a tube blank smaller than the diameter of the large end of the reducer, and use an inner die to expand the diameter of the tube blank. The diameter expansion process mainly solves the problem that the reducing diameter of the reducing diameter is not easy to be formed by the diameter reduction. Sometimes according to the material and product forming needs, the diameter expansion and the diameter reduction methods are combined.
In the process of shrinking or expanding deformation, cold pressing or hot pressing is determined according to different materials and diameter changes. Under normal circumstances, cold pressing should be used as much as possible, but hot pressing should be used for severe work hardening caused by multiple diameter changes, thicker walls or alloy steel materials.
In addition to the use of steel pipes as raw materials to produce reducers, some specifications of reducers can also be produced by stamping and forming with steel plates. The shape of the die used for drawing is designed with reference to the size of the inner surface of the reducer, and the blanked steel plate is punched and stretched with the die.
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