Based on the principle of hydraulic forming of metal bellows recommended in EJMA standard and the structure type of forming die,combined with the experience of production practice,two kinds of sealing structure commonly used in hydraulic forming of bellows are listed,and their structural characteristics and application methods are introduced respectively.The performance characteristics and application range of various sealing ring materials are described in detail,and the selection recommendations of sealing ring are given.Finally,through application,the advantages and disadvantages of the two sealing methods for hydraulic forming of bellows,limit type and non-limit type,are analyzed and summarized.
bellowshydroformingsealing ring materialssealing method
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