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Locking rigid-plastic compound bulging forming apparatus for large-caliber three-way pipes

A large-diameter and rigid technology, applied in the field of large-diameter tee-pipe lock-type rigid-plastic composite expansion forming equipment, can solve the problems of low service life of punches, too small size of tube blanks that cannot be used, and complex mold structure, etc. Achieve the effect of meeting the requirements of bulging forming

Inactive Publication Date: 2016-02-03
XINCHANG HANGDA MACHINERY MFG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • Locking rigid-plastic compound bulging forming apparatus for large-caliber three-way pipes
  • Locking rigid-plastic compound bulging forming apparatus for large-caliber three-way pipes
  • Locking rigid-plastic compound bulging forming apparatus for large-caliber three-way pipes

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Embodiment Construction

[0037] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, so that those skilled in the art can better understand the present invention and implement it, but the examples given are not intended to limit the present invention.

[0038] like Figure 4 As shown, it is a structural schematic diagram of an embodiment of the large-caliber tee pipe lock type rigid plastic composite bulging molding equipment embodiment of the present invention. The large-diameter three-way pipe lock type rigid plastic composite bulging molding equipment in this embodiment includes an upper half-mold 1 and a lower half-mold 2, and a round tubular forming mold is arranged between the upper half-mold 1 and the lower half-mold 2. Cavity 3, the two ends of the forming cavity 3 are respectively equipped with bulging extrusion punches 4 that slide and fit with it, and the lower half mold 1 is provided with a branch forming cavity 5 who...

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Abstract

The invention discloses a locking rigid-plastic compound bulging forming apparatus for large-caliber three-way pipes. The locking rigid-plastic compound bulging forming apparatus comprises an upper half die and a lower half die; a forming cavity is formed between the upper half die and the lower half die; bulging extrusion punches are mounted at the two ends of the forming cavity, respectively; a branch pipe forming cavity is formed in the lower half die and a balance punch is mounted in the branch pipe forming cavity; a rigid bulging inner die is arranged between the two bulging extrusion punches; the rigid bulging inner die comprises push rods located at both ends, respectively, and a forming inner module is arranged between the two push rods; the forming inner module is connected with the two push rods through double hinged connecting rods; axes of the push rods are in sliding fit with the forming cavity, respectively, and push rods are mounted in the corresponding bulging extrusion punches; and a quick demounting connecting structure is arranged on one push rod; compound hydraulic cylinders for driving the bulging extrusion punches to slide in the forming cavity and driving the push rods to slide in the bulging extrusion punches are arranged at the two ends of the forming cavity, respectively; an auxiliary pressure mechanism is arranged between the two push rods.

Description

technical field [0001] The invention belongs to the technical field of non-cutting processing of pipe materials, and in particular relates to a large-diameter three-way pipe locking type rigid-plastic composite bulging forming equipment. 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,...

Claims

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Application Information

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IPC IPC(8): B21D26/037B21D26/047B21D26/041
Inventor 刘胜利
Owner XINCHANG HANGDA MACHINERY MFG
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