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Two-way hydroforming mold for microtubes

A two-way hydraulic and forming mold technology, which is applied in the field of micro-tube forming, to achieve the effects of avoiding communication, improving plastic forming ability, and improving sealing performance

Inactive Publication Date: 2016-07-06
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method can greatly improve the plastic forming ability of microtubes, but so far, there is no suitable device to realize this process

Method used

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  • Two-way hydroforming mold for microtubes
  • Two-way hydroforming mold for microtubes

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Experimental program
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Embodiment

[0020]A molding device using the micro-tube bidirectional hydraulic molding die of the present invention includes a PLC control module, an internal pressure pump A, an external pressure pump A', an internal pressure supercharger B, an external pressure supercharger B', an internal pressure Pressure check valve C, external pressure check valve C', internal pressure high pressure needle valve E, external pressure high pressure needle valve E', fuel tank F forming die D; wherein, the forming die includes a guide block 7, a cylindrical shell 6, an insert Block 5, blank holder 4, sealing block 3 and gasket 2; there are two holes on one end of the guide block 7, one of which is the internal pressure liquid port of the micro-tube located at the center of the guide block 7, and the other hole is located at the center of the guide block 7. The external pressure liquid port of the microtube at the eccentric position of the guide block 7, the other end face of the guide block 7 has an ann...

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Abstract

The invention discloses a two-way hydroforming mold for microtubes, which includes a guide block, a cylindrical shell, an insert, a blank holder and a sealing block; the invention can simultaneously apply pressure to the inner and outer surfaces of the microtube, and drive the microtube through the pressure difference. Tube forming; the introduction of back pressure can prevent the generation, growth and nucleation of micro-cracks inside the micro-tube, and then greatly improve the plastic forming ability of the micro-tube; and the present invention installs an O-shaped Sealing ring, the sealing performance is greatly improved, and it can seal the high-pressure liquid with a pressure of up to 350MPa; at the same time, it also isolates the high-pressure liquid inside and outside the microtube, avoiding the connection of high-pressure liquid inside and outside; An O-ring is installed to prevent the external high-pressure liquid from communicating with the internal pressure through the insert.

Description

technical field [0001] The invention belongs to the technical field of micro-tube forming, in particular to a micro-tube bidirectional hydraulic forming die. Background technique [0002] The hydroforming technology of pipe fittings uses the tube blank as the raw material. By applying liquid pressure to the tube cavity and applying a load in the axial direction to make it plastically deform in a given mold cavity, the tube wall is attached to the inner surface of the mold, thereby obtaining Forming techniques for parts of the desired shape. At present, hydroforming of pipe fittings is mainly used in the manufacture of automobile frame and chassis parts, large ships, and aerospace industries. However, with the development of science and technology, the demand for micro-hollow pipe fittings in electronics, medical, micro-devices and other industries is increasing, and there is an urgent need for a processing technology that can manufacture micro-pipe fittings in large quantit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21D26/047B21D26/041B21D26/045
Inventor 杨晨李鹏唐伟
Owner NANJING UNIV OF SCI & TECH
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