Magnetic-field isostatic press provided with film dry bag

Abstract

The invention relates to an isostatic press for magnetic powder formation, in particular to a magnetic-field isostatic press provided with a film dry bag. By adoption of the magnetic-field isostatic press provided with the film dry bag, the problems that an existing magnetic-field isostatic press cannot press non-circular workpieces, is low in efficiency and cannot achieve automation easily, and the intensity of an oriented magnetic field is low are solved. The magnetic-field isostatic press provided with the film dry bag comprises a rack. An upper oil cylinder is arranged at the top of the rack. A workbench is arranged in the middle of the rack. An isostatic mold is placed on the workbench. Oriented magnetic field devices are arranged above and below the isostatic mold. The isostatic mold comprises a high-pressure cavity and the dry bag in the high-pressure cavity. The dry bag is composed of a supporting connection part which is located on the upper portion and is in seal connection with the inner wall of the high-pressure cavity and a working part which is located on the lower portion. A porous breathable rigid explorator is further fixed in the high-pressure cavity. The working part of the dry bag is made of a film material. A magnetic powder tamping mechanism is further arranged outside the high-pressure cavity. The magnetic-field isostatic press provided with the film dry bag can be used for pressing non-circular workpieces and is high in automation degree, and the intensity of an orientated magnetic field is high.

Description

technical field [0001] The invention relates to magnetic powder molding equipment, in particular to an isostatic press for magnetic powder molding, in particular to a film dry bag magnetic field isostatic press. Background technique [0002] At present, the most commonly used process for sintered anisotropic magnetic powder molding is to use a magnetic field press for magnetic field orientation preforming, and then use an isostatic press for isostatic pressing to improve the density. Anisotropic magnetic powder preforming requires magnetic field orientation, and the pressure direction is parallel to the direction of the orientation magnetic field, which is called a parallel compression field press; the pressure direction is perpendicular to the direction of the orientation magnetic field, which is called a vertical compression field press; whether it is parallel or vertical Any pressure will destroy the magnetic field orientation to a certain extent, and the damage to the ma...

AI Technical Summary

Problems solved by technology

[0007] The invention solves the problems that the existing magnetic field isostatic pressing machine cannot press non-circular workpieces, the efficiency is low, it is difficult to realize automation, and the intensity of the orientation magnetic field is low, and it provides a film dry bag magnetic field isostatic pressing machine

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