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Rigid and plastic compound bulging forming die for large-caliber T-branch pipe

A tee pipe and large-diameter technology, applied in the field of large-diameter tee pipe rigid-plastic compound bulge forming molds, can solve the problems of low service life of the punch, too small size of the tube blank that cannot be used, and complex mold structure, etc., to achieve The effect of meeting the requirements of bulging forming

Inactive Publication Date: 2016-01-20
XINCHANG HANGDA MACHINERY MFG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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

Method used

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  • Rigid and plastic compound bulging forming die for large-caliber T-branch pipe
  • Rigid and plastic compound bulging forming die for large-caliber T-branch pipe
  • Rigid and plastic compound bulging forming die for large-caliber T-branch pipe

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Embodiment Construction

[0035] 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.

[0036] Such as Figure 4 As shown, it is a structural schematic diagram of the compound bulging device adopting the rigid plastic compound bulging forming mold of the large-diameter tee pipe of the present invention. The composite bulging device includes a rigid plastic composite bulging molding die for a large-diameter tee pipe and a thrust device. The large-diameter tee pipe rigid-plastic composite bulging molding die of this embodiment includes an upper half-mold 1 and a lower half-mold 2, and a circular tubular forming cavity 3 is arranged between the upper half-mold 1 and the lower half-mold 2, forming The two ends of the cavity 3 are respectively equipped with bulging extru...

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Abstract

The invention discloses a rigid and plastic compound bulging forming die for a large-caliber T-branch pipe. The rigid and plastic compound bulging forming die comprises an upper half die and a lower half die. A forming cavity in a circular pipe shape is formed between the upper half die and the lower half die. Bulging squeezing punches in sliding fit with the forming cavity are mounted at the two ends of the forming cavity respectively. The lower half die is provided with a branch pipe forming cavity with the axis perpendicularly intersecting with the axis of the forming cavity, and a balance punch is mounted in the branch pipe forming cavity. A rigid bulging inner die is arranged between the two bulging squeezing punches and comprises pushing rods located at two ends respectively. A forming inner die block is arranged between the two pushing rods, matched with the branch pipe forming cavity and used for driving bulging deformation of a pipe blank. The forming inner die block is connected with the two pushing rods through double-hinge connection rods. The axes of the pushing rods are parallel to the axis of the forming cavity. The pushing rods are mounted in the corresponding bulging squeezing punches in a sliding fit mode respectively. One pushing rod is provided with a quick detaching connection structure. An auxiliary pressure mechanism is arranged between the two pushing rods.

Description

technical field [0001] The invention belongs to the technical field of non-cutting processing of pipes, and in particular relates to a rigid-plastic compound bulging molding die for a large-caliber tee pipe. 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 different pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21D26/033B21D37/10
Inventor 刘胜利
Owner XINCHANG HANGDA MACHINERY MFG
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