Hydraulic Forming Technology of Large Radius Cylinder in Dyeing Machine

Abstract

The invention relates to a metal material molding technology, and discloses a water pressure molding technology for a large-radius barrel of a dyeing machine. The technology comprises the following steps that 1, sheet metal is made into barrel-shaped blank (1) with one end open; 2, the blank (1) is placed in a mould (2); 3, water is injected into the interior of the blank (1) through the open end of the blank (1), and then pressurizing bulging is performed on the blank (1); 4, after the pressure in the blank (1) is stable, water is injected into the blank (1) again to perform further pressurizing; 5, the pressure of the water in a bulging body is reduced, and the water is drained; 6, the hydroformed bulging body is taken out from the mould (2); 7, the bulging body is polished and ground. The water pressure molding technology for the large-radius barrel of the dyeing machine has the advantages that multiple stages of pressurizing is performed by gradually increasing the pressure, the defects that the blank is incomplete in molding and springback is prone to occurring in the water pressure molding technology are avoided, and the blank damage due to the fact that one-time pressurizing is too large is prevented.

Description

technical field

[0001] The invention relates to a metal material forming technology, in particular to a hydraulic forming process for a large-radius cylinder of a cloth dyeing machine. Background technique

[0002] Products made of thin metal tubes such as stainless steel, copper, and aluminum are pressed into various shapes, mainly using rubber expansion technology, that is, the metal thin tubes are placed in molds of various shapes, and then liquid rubber is injected into the tubes to utilize rubber expansion. The pressure is used to extrude the thin tube to form it, but the rubber expansion process has the problem that the expansion rate is too low, only more than ten percent, and the product shape is monotonous. Later, the technology of water injection and pressure expansion was adopted, that is, water was injected into the thin tube and the water pressure was increased to increase the pressure of extruding the thin tube. There are disadvantages that the metal tube is p...

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