Three-step hydraulic precise forming die and method for rectangular corrugated pipe
A technology for forming molds and bellows, which is applied in the field of three-step hydraulic precision forming molds for rectangular corrugated pipes, and achieves the effects of uniform waveform, simple forming process and low manufacturing cost.
Active Publication Date: 2021-08-24
XI'AN PETROLEUM UNIVERSITY +1
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Problems solved by technology
Therefore, the traditional circular metal bellows hydraulic bulging process (two-step method) is no longer suitable for the precise plastic forming of special-shaped metal bellows represented by rectangular metal bellows
Method used
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Embodiment Construction
[0086] The present invention will be described in further detail below in conjunction with the accompanying drawings.
[0087] Such as figure 1 Shown: a three-step hydraulic precise forming mold for rectangular corrugated pipes, including: upper mandrel 1, set nut 2, upper guide plate 3, end cover 4, upper die piece 5, shaft sleeve 6, guide post 7, positioning shape limiter Die inner die 8, positioning shape-limiting die outer ring 9, rectangular tube blank 10, middle die outer ring 11, middle die inner die 12, lower end die 13, rubber sealing ring 14, lower mandrel 15 , lower guide plate 16, secondary wave positioning block 17, characterized in that:
[0088] Such as Figure 1 to Figure 5As shown: the lower guide plate 16 is placed flat on the platform of the hydraulic machine, the rubber sealing ring 14 is set on the lower mandrel 15, and the lower end cover 4 and the lower mandrel 15 connected and fixedly assembled by the set nut 2 are placed on the lower guide plate 16 ...
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The invention discloses a three-step hydraulic precise forming die and method for a rectangular corrugated pipe. The three-step hydraulic precise forming die is characterized in that a lower core shaft and a lower end cover are placed on the surface of the center of a lower guide plate, a rectangular pipe blank sleeves an assembly body formed by the lower core shaft and the lower end cover, a lower end die sheet sleeves the outer side of the lower end of the rectangular pipe blank, and the lower end die sheet makes contact with the lower end cover; positioning shape-limiting die sheets and middle die sheets are alternately arranged above the lower end die sheet and on the outer side of the rectangular pipe blank, the positioning shape-limiting die sheets are arranged on the uppermost layer and the lowermost layer, an upper end die sheet is arranged above the positioning shape-limiting die sheet on the uppermost layer, and the upper end die sheet sleeves the outer side of the upper end of the rectangular pipe blank; and an upper end cover and an upper core shaft are arranged on the inner side of the upper end of the rectangular pipe blank, an upper guide plate is arranged above the upper end cover and the upper core shaft, and guide columns penetrate through guide column mounting holes in the lower guide plate and guide column mounting holes in an upper shaft sleeve of the upper guide plate. The three-step hydraulic precise forming die and method for the rectangular corrugated pipe are high in workpiece precision, simple in forming process, high in production efficiency and low in manufacturing cost.
Description
technical field [0001] The invention relates to the technical field of hydraulic forming of metal bellows with irregular peripheral contours, in particular to a three-step hydraulic precision forming mold and method for rectangular bellows. Background technique [0002] The traditional circular metal bellows is a kind of rotary parts with a circular circumferential outline and U-shaped, S-shaped, Ω-shaped cross-sectional structures. It is widely used as an elastic element in aerospace, ships, In nuclear energy, electric power, petrochemical, construction and other fields, it has the functions of flexible compensation, sealing and vibration reduction, and is one of the important parts of pipeline connection system, sealing system and vibration reduction system. In recent years, with the continuous expansion of the application field of metal bellows, in the face of some special working conditions, the circumferential contour of metal bellows needs to adopt special shapes such ...
Claims
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Login to View More IPC IPC(8): B21D15/06B21D15/10B21C37/15
CPCB21D15/06B21D15/10B21C37/158
Inventor 刘静王文华吕志勇李兰云左星煜葛前刘强
Owner XI'AN PETROLEUM UNIVERSITY