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A method for matching the relationship between pressure and feed in internal high pressure forming tee pipe

An internal high pressure forming and three-way pipe technology, applied in the field of internal high pressure forming, can solve the problems of difficult-to-form three-way pipe parts, long production process cycle, uncontrollable pressure, etc., and achieves high accuracy, reduced test cost and low cost. Effect

Active Publication Date: 2019-02-19
NANCHANG HANGKONG UNIVERSITY
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a method for matching the relationship between pressure and feed in the internal high-pressure forming tee pipe to solve the uncontrollable internal pressure of the three-way pipe in the prior art during internal high-pressure forming, and the production process has a long cycle and low efficiency. The problem of low cost and high cost has realized the difficult-to-form tee pipe parts through less experiments

Method used

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  • A method for matching the relationship between pressure and feed in internal high pressure forming tee pipe
  • A method for matching the relationship between pressure and feed in internal high pressure forming tee pipe
  • A method for matching the relationship between pressure and feed in internal high pressure forming tee pipe

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Embodiment 1

[0031] Such as figure 1 , 2 and 3, this embodiment describes in detail the method, device and principle of the present invention for matching the relationship between internal pressure and feed in high pressure forming tee pipes.

[0032] This embodiment provides a method for matching the relationship between pressure and feed in the internal high pressure forming tee pipe, wherein the tee pipe is a thin-walled aluminum alloy tee pipe, and the tube blank 10 is a thin-walled aluminum alloy tube blank. The data of the whole process The test and on-site forming are carried out on the same set of molds, and the specific steps include:

[0033]Step 1: Put the tube blank 10 into the cavity between the upper mold 4 of the tee pipe and the lower mold 5 of the tee pipe, and the left punch 6 and the right punch 7 are axially displaced at the pipe end by the feed system 3 Under the action, both ends of the tube blank 10 are sealed at the same time, and the current displacement remains ...

Embodiment 2

[0041] This embodiment is a further detailed embodiment on the basis of Embodiment 1. In this embodiment, an aluminum alloy tube blank part with an outer diameter of 32 mm and a thickness of 1 mm is used.

[0042] As shown in Tables 1, 2 and 3, through a device for matching the internal pressure and feed relationship of the internal high-pressure forming tee pipe in Example 1, this embodiment is based on the above-mentioned embodiment 1 A device for matching the internal high-pressure forming tee After multiple experiments in Step 1 and Step 2 described in the method of the relationship between tube internal pressure and feed, three sets of free bulging test results of aluminum alloy tube blank parts were recorded, as shown in Table 1, and the average value was taken to obtain the tee The ultimate bulging pressure P in the tube mold cavity max = 12.0MPa; three sets of test data of the bulging capacity of aluminum alloy tube billet parts are recorded, as shown in Table 2, and t...

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Abstract

The invention discloses a method for matching the relationship between the internal pressure and the feeding of an internal high pressure forming three-way pipe. By adding a relief valve to the existing internal high pressure forming device, the instantaneous overpressure rupture of forming is avoided. System, low pressure pump feeding system, pipe end axial displacement feeding system, tee pipe upper die, tee pipe lower die, left punch, right punch, relief valve and oil sump. The thin-walled aluminum alloy tube blank is put into the above-mentioned device for internal high pressure forming. First, the tube end sealing and pressure bursting tube blank experiment and the tube end sealing intermittent feeding and internal pressure stability not exceeding the limit experiment are carried out, respectively. Record the ultimate bulging pressure and axial limit feed of the tube blank in the cavity of the tee tube, and then use the measured data to obtain the difficult-to-form thin-walled aluminum alloy tee tube parts through less experiments on the same device. The forming steps are simple, practical, efficient, and save material cost and experiment cost.

Description

technical field [0001] The invention relates to the technical field of internal high pressure forming, in particular to a method for matching the relationship between internal pressure and feed of an internal high pressure forming tee pipe. Background technique [0002] Thin-walled aluminum alloy tee pipes are widely used in aviation oil circuits and environmental control due to their light weight. At present, the tee pipe is welded by stamping half pipes in aviation manufacturing. The parts have high quality, low strength, many forming processes and low efficiency. The internal high-pressure forming tee pipe is integrally formed, and the formed pipe fittings have high strength, light weight and high efficiency. This technology has been widely used in the forming of civilian stainless steel and copper alloy tee pipes. The reason is that the civil stainless steel tee pipe has high strength, which makes it insensitive to the matching relationship between the pressure inside ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21D26/037B21D26/047
CPCB21D26/037B21D26/047
Inventor 徐雪峰王高潮孙前江董洪波付春林徐欧平
Owner NANCHANG HANGKONG UNIVERSITY
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