Method for protecting gas of backs of weld joints of membranes of corrugated tube
A technology of gas protection and bellows, applied in welding equipment, welding accessories, laser welding equipment, etc., can solve the problems of low operation efficiency and high cost, and achieve the effect of simple operation, strong adaptability and high efficiency
Active Publication Date: 2020-05-05
SHANGHAI AEROSPACE EQUIP MFG GENERAL FACTORY
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Problems solved by technology
Building an integral vacuum chamber can solve this problem, but this method has high cost and low operation efficiency, and a more convenient and efficient method of welding back gas protection is needed
Method used
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[0030] Such as Figure 1~3 , in this embodiment, the method for gas protection on the back of the weld seam of the bellows diaphragm includes the following steps:
[0031] S1, put the first piece of diaphragm 1 on the bottom of the inner circular welding seam back protection tool; adjust the position of the first air inlet pipe 5 and the first air outlet pipe 6, and place the Place the first gasket 3 and the second gasket 4; place the second diaphragm 2 in the inner circle weld back protection tool; press the inner circle weld back protection fixture.
[0032] Wherein, the first air intake pipe 5 is located in the butt joint gap of one end of the first gasket 3 and the second gasket 4, and the first air outlet pipe 6 is located in the butt joint of the other end of the first gasket 3 and the second gasket 4. in the gap. Preferably, the gasket is mainly used for supporting the back space of the diaphragm.
[0033] S2, filling the protective gas from the first air intake pipe...
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The invention discloses a method for protecting gas of the backs of weld joints of membranes of a corrugated tube. The method comprises the steps that a first membrane, a second membrane, a first spacer and a second spacer are installed; welding is performed along the weld joints of the inner circles of the membranes of the corrugated tube, protection gas is injected through a first gas inlet pipeduring welding, and welding is performed to obtain a membrane pair; N sets of membrane pairs are assembled in a protection tool for the backs of the weld joints of the outer circles, and a protectiontool clamp for the backs of the weld joints of the outer circles is compressed. Protection gas is injected through a second gas inlet pipe, and welding is performed along the weld joints of the outercircles of the membranes of the corrugated tube to obtain the corrugated tube. According to the method, by using reasonable design, the gas of the backs of the weld joints of the membranes of the corrugated tube is protected, the formation quality of the weld joints of the membranes is effectively improved, and the method is easy to operate and high in adaptability.
Description
technical field [0001] The invention relates to the technical field of bellows welding, in particular to a gas protection method for the back of a bellows diaphragm weld seam. Background technique [0002] Welded bellows is an elastic element commonly used in aerospace systems. It is formed by welding a certain number of metal diaphragms through inner and outer circles. Welding is a key process in the manufacture of this type of bellows, and the quality of welding directly determines the performance of the bellows. During the welding process, in order to obtain excellent weld performance, it is generally necessary to protect the front and back of the weld with gas protection. It is easy to achieve gas protection on the front of the diaphragm weld, but it is more difficult to implement gas protection on the back of the weld. [0003] With the application and popularization of diaphragms such as high-temperature alloys and titanium alloys, the diaphragm welding of such materi...
Claims
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IPC IPC(8): B23K9/32B23K10/02B23K26/70
CPCB23K9/32B23K10/02B23K26/702
Inventor 许辉尹玉环赵慧慧方瑜崔凡夏佩云汤化伟余果吴伟包云峰
Owner SHANGHAI AEROSPACE EQUIP MFG GENERAL FACTORY