Check patentability & draft patents in minutes with Patsnap Eureka AI!

Simple inside high-pressure forming method

A simple and convenient technology for internal high pressure forming, which is applied to the field of internal high pressure forming of thin-walled metal tube blanks and cup-shaped thin-walled metal tube blanks, can solve the problems of high application environmental conditions and increased hydraulic pressure, and achieves a simple and practical method. The hydraulic pressure and axial force are stable and reliable, and the structure is simple.

Inactive Publication Date: 2010-06-02
GUILIN UNIV OF ELECTRONIC TECH
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method requires that the pressure equipment can provide two kinds of force and two kinds of motion: one is used to seal the pipe end, and the other is used to push the piston rod, which has high requirements for the application environment; this method does not set a booster chamber or directly increase the The pressure chamber and the forming chamber are designed as a whole, and the diameter of the piston rod is limited by the diameter of the forming pipe, which will cause insufficient hydraulic pressure increase during large deformation

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Simple inside high-pressure forming method
  • Simple inside high-pressure forming method
  • Simple inside high-pressure forming method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Such as Figure 4 As shown, put figure 2 The thin-walled metal tube billet shown is put into the forming cavity 5 of the hydraulic bulging device of the internal replenishment pressurized pipe material and sealed well, and the stepped shaft type pressure head 4 is installed at the end of the pipe, and the cylinder body 3 is filled with liquid , set the overflow pressure P according to the forming needs (the overflow valve is installed at 7 places), the piston 1 starts to move S under the action of external force, squeezes the liquid in the cylinder, and gradually increases the pressure of the liquid in the cylinder, Form high-pressure liquid; the high-pressure liquid is injected into the fully enclosed tube through the through hole on the pressure head, and the tube blank begins to bulge; The shaft shoulder of the piston is on the end of the tube blank 6. The process from the start of the piston 1 movement to the contact with the pressure head 4 is a pre-pressurizatio...

Embodiment 2

[0029] Such as Figure 5 As shown, put Figure 4 Remove the upper platen 10, spacer ring 11, lower platen 12, base 14, core 15, O-shaped sealing ring 9 (not dismantled in the cylinder body 3) and screws 13, and process them at the lower end of the inner cavity of the cylinder body 3 The overflow port 7 is used to install a pressure gauge and an overflow valve assembly to control the hydraulic pressure in the molding process, and replace the special-shaped cross-section forming cavity 13 with Figure 5 Shown closed forming die cavity, the forming die cavity is fixed on the cylinder block 3 lower end face with screw 13, in Figure 5 Place the cup-shaped thin-walled metal tube blank in the forming die cavity 5, repeat the method for generating hydraulic pressure and axial force in embodiment 1, and the method of the present invention can be used to complete the bulging cup-shaped thin-walled metal tube blank, forming and sealing Special-shaped cross-section hollow parts.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a simple and convenient inner high pressure forming method. The inner high pressure forming method is characterized in that a thin-wall metal tube blank or a cup-shaped thin-wall metal blank is placed into a hydraulic expanding die cavity of the forming device, liquid in a cylinder is extruded by the movement of a piston outside the hydraulic expanding die cavity to obtainhigh pressure liquid, the high pressure liquid is automatically injected into a fully enclosed tube blank by a pressure head with through holes, therefore, the tube blank obtains the hydraulic pressure for expanding; when the piston contacts the pressure heat arranged in the cylinder, the pressure head begins to apply axial force to the end of the tube blank; the axial force is controlled by controlling the piston stroke, the hydraulic pressure for the tube blank forming is controlled by regulating the overflow value of an overflow valve arranged at an overflow port; under the combined actionof the hydraulic pressure and the axial force, the tube blank is gradually formed and is filled with the die cavities. The inner high pressure forming method has the advantages of simple forming method, reliable forming process, low demand for operating environment, low application cost, etc.

Description

technical field [0001] The invention relates to an internal high-pressure forming method, in particular to an internal high-pressure forming method for a thin-walled metal tube blank and a cup-shaped thin-walled metal tube blank. Background technique [0002] In the automotive and aerospace industries, how to use light-weight, high-strength hollow parts to replace traditional beams and brackets to meet the requirements of energy conservation and environmental protection in this field has become a research hotspot in this field. Internal high pressure forming is a new technology produced under this background. [0003] Internal high pressure forming is a modern plastic processing technology that uses liquid as the pressure transmission medium and uses internal high pressure to deform the pipe into a three-dimensional hollow shape. At present, the industry mainly adopts a special hydraulic supply system to provide the hydraulic pressure required for the bulging of the formed ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): B21D26/02B21D26/033
Inventor 杨连发吴丛强
Owner GUILIN UNIV OF ELECTRONIC TECH
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com