The manufacturing process of concentric reducer

Concentric reducer tube manufacturing process is the most simple, with a thick wall thickness of the tube as a blank, to expand the diameter of one end or with a wall thickness of the pipe as a blank, reduce the diameter of one end can be. Regardless of flaring or necking reducer, is usually used to suppress the mold.

The current domestic widespread use of eccentric mold step by step to suppress the eccentric reducer 12Cr1MoV alloy reducer, with this process to produce more than three eccentric reducer, in the small eccentric eccentric end will produce a serious gap, the wall from the tumor, wall thickness Uneven and oval and so on. When the oblique cross section is not a circular surface but an elliptical surface, there is a problem that the wrong side between the end face and the straight pipe can not be completely connected. If the use of a new pressing process, that is, first with a concentric die to suppress the concentric reducer, then the pressure of the concentric reducer into the eccentric mold to suppress the need for the eccentric reducer, the inside and outside Smooth surface A234 WP12 reducer, small head flat, uniform wall thickness, roundness qualified, less raw materials used.
Reducing tube processing technology: Reducing diameter of the reducer is the same process with the diameter of the same diameter tube diameter into the forming mold, through the axial direction along the tube pressing, the metal along the cavity movement And shrink forming. According to the size of the reducer diameter, divided into a press forming or multiple press forming.
With various types of stamping abrasive, custom processing of various types of carbon steel / alloy steel / stainless steel concentric reducer, eccentric reducer. Reducing pipe standards for the national standard, American standard, the British standard and a variety of non-standard products. The roundness of the reducer is not greater than 1% of the outer diameter of the corresponding end and the permissible deviation is ± 3 mm.

Steel concentric, eccentric reducer is usually cold working, that is, in the cold state on the hydraulic press to suppress (and sometimes will be hot). Process: Raw material re-examination → cutting → shot blasting → lubrication → pressing → heat treatment → shaping → shot blasting → groove processing → non-destructive testing → finished product inspection → corrosion → logo → storage