Hydraulic control tee joint buckling rigid-plastic compounded bulging equipment

Abstract

The invention discloses hydraulic control tee joint buckling rigid-plastic compounded bulging equipment. The hydraulic control tee joint buckling rigid-plastic compounded bulging equipment comprises an upper half die and a lower half die, wherein a forming cavity is arranged between the upper half die and the lower half die. The two ends of the forming cavity are each provided with a bulging squeezing punch head. The lower half die is provided with an axis branch pipe forming cavity, and a balance punch head is installed in the branch pipe forming cavity. A rigid bulging inner die is arranged between the two bulging squeezing punch heads and comprises push rods located at the two ends respectively, and a forming inner die block is arranged between the two push rods. The forming inner die block is connected with the two push rods through a double-hinge connecting rod. The opposite ends of the two push rods are provided with connecting grooves facing an opening of the branch pipe forming cavity, and a limiting structure is arranged in each connecting groove. The push rods are installed in the corresponding bulging squeezing punch heads respectively in a sliding fit mode. A bulging liquid inlet and a bulging liquid outlet are formed in each bulging squeezing punch head. One push rod is provided with a buckling rapid detachment and connection structure. Thrust devices are arranged at the two ends of the forming cavity respectively, and each thrust device comprises a hydraulic cylinder meeting the requirement.

Description

technical field [0001] The invention belongs to the technical field of non-cutting processing of pipes, and in particular relates to a liquid-controlled three-way pipe lock-type rigid-plastic composite bulging device. Background technique [0002] There are many types of pipe bulging, mainly divided into two types: rigid bulging and soft mold bulging. Rigid punch bulging is only suitable for bulging of axisymmetric bulging parts that do not require high shape and dimensional accuracy. When liquid, gas or elastomer is used as the pressure transmission medium for bulging, it is commonly called soft mold bulging. The liquid can be oil, emulsion or water, and the elastomer usually adopts polyurethane rubber or natural rubber. Due to its unique characteristics of being easy to be solid or liquid, and recyclable and reusable, paraffin wax is also used as a bulging pressure transmission medium, and has achieved good technical results in production. Therefore, according to the di...

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Problems solved by technology

[0009] Compared with the liquid medium extrusion bulging method, although the plastic medium separation punch extrusion bulging method is more complicated, it avoids the expensive hydraulic pressure boosting system, so it has less equipment investment, high productivity and good forming effect. Good advantages, but it also has a low service life of the punch, a complex mold structure, and cannot be applied to occasions where the size of the tube blank is too small

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