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Method and Apparatus for Pulsed Forming, Punching and Trimming of Tubular Members

A technology for forming and forming tubes, applied in the fields of pulse forming, punching and trimming and devices for tubular components, and can solve problems such as short tube fittings

Inactive Publication Date: 2012-12-12
FORD GLOBAL TECH LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In other words, the tubing is relatively short

Method used

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  • Method and Apparatus for Pulsed Forming, Punching and Trimming of Tubular Members
  • Method and Apparatus for Pulsed Forming, Punching and Trimming of Tubular Members
  • Method and Apparatus for Pulsed Forming, Punching and Trimming of Tubular Members

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Embodiment Construction

[0028] A detailed description of illustrated embodiments of the invention is provided below. The disclosed embodiments are examples of inventions that may be embodied in a variety of alternative forms. The figures are not necessarily drawn to scale. Some components can be zoomed in or out to reveal specific component details. Specific structural and functional details disclosed in this application are not intended to be limiting, but merely to serve as representative guidelines for teaching one of ordinary skill in the art how to practice the invention.

[0029] see figure 1 , shows a hydroforming tool 10 wherein a tubular blank 12 is disposed in a die cavity 16 defined in the hydroforming tool 10 . A first electrohydraulic forming (EHF) electrode 18 and a second EHF electrode 20 are disposed at a first end 22 and a second end 24 of the tubular blank 12 .

[0030] see figure 2 , shows that the hydroforming tool 10 includes an upper die 28 and a lower die 30 that are open...

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PUM

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Abstract

A hydro-forming tool is disclosed in which first and second electrohydraulic forming (EHF) electrodes are used to provide a pressure pulse in opposite ends of a tubular pre-form. Alternatively, an accumulator with a rupturable membrane may be provided in opposite ends of a tubular pre-form for hydro-forming the tubular pre-form. A multiple discharge hydro-forming tool is also disclosed in which several pairs of accumulators are provided with selectively rupturable membranes that are ruptured to provide a pressure pulse in opposite ends of a tubular pre-form. The accumulators or EHF electrodes may be sequenced to provide separate pressure pulses that may be coordinated with retraction of a filler plug or shifting of a split ring into their respective retracted positions. A plurality of pressure pulses may be used to form, pierce and trim the tubular pre-form.

Description

technical field [0001] The present disclosure relates to methods and apparatus for hydroforming, punching or trimming tubular stock using pressurized liquids. Background technique [0002] During production, tubular blanks are formed using pressure pulses that apply static pressure through a liquid in a hydroforming process. Hydroforming operations are generally limited to pipes of uniform circumference and to applications without small radius fillets. Punching a pipe with a liquid using static pressure is difficult because the static pressure in the pipe drops immediately after piercing the first hole (or even a portion of the hole). The reduction in static pressure results in partial separation of the pierced waste. Trimming the tube body using hydrostatic pressure through the liquid is an unproven manufacturing process. [0003] The pulse shaping of tubular blanks known from the prior art takes the form of: [0004] 1) Explosive forming, detonating explosives in the t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21D26/033B21D26/035B21D26/047
CPCB21D26/033B21D26/12Y10T29/49805
Inventor 谢尔盖·费奥多罗维奇·戈洛瓦先科
Owner FORD GLOBAL TECH LLC