CN105458058B - A kind of method for reducing or eliminating multilayer corrugated pipe interlayer spacings - Google Patents
A kind of method for reducing or eliminating multilayer corrugated pipe interlayer spacings Download PDFInfo
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- CN105458058B CN105458058B CN201410459818.XA CN201410459818A CN105458058B CN 105458058 B CN105458058 B CN 105458058B CN 201410459818 A CN201410459818 A CN 201410459818A CN 105458058 B CN105458058 B CN 105458058B
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- interlayer spacings
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Abstract
The present invention relates to electro-magnetic forming and Special Welding Technique field, specifically discloses a kind of method for reducing or eliminating multilayer corrugated pipe interlayer spacings.This method includes：1st, selection is appropriate for the metal pipe material of magnetic field impulse processing；2nd, according to the requirement of product subsequent processing operations, the suitable mode for eliminating interlayer spacings is selected；3rd, the size of metal pipe material internal diameter or external diameter to be processed is measured, it is determined that the size of required mould；4th, according to the pipe diameter size, thickness, material of metal pipe material to be processed, from different magnetic field impulse coils, coil is arranged in or beyond bellows, and magnetic field impulse coil both ends are connected to the two poles of the earth of magnetic field impulse equipment；5th, bellows is deformed using the electric discharge of magnetic field impulse equipment, eliminates bellows interlayer spacings.A kind of method for reducing or eliminating multilayer corrugated pipe interlayer spacings of the present invention, solves the technical barrier that multilayer corrugated pipe used in airspace engine welds, welding quality greatly improved.
Description
Technical field
The invention belongs to electro-magnetic forming and Special Welding Technique field, and in particular to one kind reduces or eliminated multilayer corrugated pipe
The method of interlayer spacings.
Background technology
Bellows is manufactured by thin wall multi-layer pipe, main part of the manufacture with shock-absorbing function, is mainly used in important
In equipment and important instrument, such as occasion of airspace engine, automobile, power station with judder, material is mostly stainless steel.
For example, using liquid hydrogen, liquid oxygen propellant when airspace engine works, wherein for conveying liquid hydrogen, liquid oxygen low temperature pushes away
Enter the pipeline of agent, it is necessary to bear high vibration and wave., it is necessary to using thin wall multi-layer during this pipeline is processed in manufacture
Multilayer is welded into one layer by bellows made of pipe, wherein end portion with being needed before weld, and the technique of use is referred to as rolling
Weldering, during roll welding, due to the interlayer spacings of multilayer pipe, in welding process, often there is " cavity " defect in interlayer, this
" cavity " is serious quality problems, it is necessary to is eliminated, repair welding after now mainly being removed using mechanical means.Most reliable " cavity " disappears
Except method is exactly to eliminate interlayer spacings, and prior art can not be realized.
Electromagnetic forming technique is to utilize electromagnetic principle by electric energy abrupt release after capacitor is put aside, and is converted into electromagnetism
Power acts on a kind of manufacturing technology that the good metal material of electric conductivity brings it about deformation, have at a high speed, energy it is big, without dirt
The advantages that dye, small resilience, energy-saving and environmental protection.
The content of the invention
It is an object of the invention to provide a kind of method for reducing or eliminating multilayer corrugated pipe interlayer spacings, it passes through magnetic arteries and veins
Punching eliminates thin wall multi-layer metal tube interlayer spacings, so as to reach the purpose for reducing weld defect.
Technical scheme is as follows：A kind of method for reducing or eliminating multilayer corrugated pipe interlayer spacings, this method tool
Body comprises the following steps：
Step 1, selection are appropriate for the metal pipe material of magnetic field impulse processing；
Step 2, the requirement according to product subsequent processing operations, select the suitable mode for eliminating interlayer spacings；
The size of step 3, measurement metal pipe material internal diameter to be processed or external diameter, it is determined that the size of required mould；
Step 4, pipe diameter size, thickness, material according to metal pipe material to be processed, will from different magnetic field impulse coils
Coil is arranged in or beyond bellows, and magnetic field impulse coil both ends are connected to the two poles of the earth of magnetic field impulse equipment；
Step 5, being discharged using magnetic field impulse equipment deforms bellows, eliminates bellows interlayer spacings.
The metal pipe material of magnetic field impulse processing is appropriate in described step 1 includes aluminium, copper alloy, stainless steel multilayer metal
Tubing.
The thickness in monolayer of described multiple layer metal tubing is 0.1~0.5mm, a diameter of 100~200mm of Multilayer metal tube,
Length is 10~20mm, and 2~3 layers, metal pipe material gross thickness is in below 1.5mm.
The mode of bellows interlayer spacings is eliminated in described step 2 includes undergauge mode and bulging mode, wherein, if
Need to ensure metal pipe internal diameter size, then use and inwardly apply stressed undergauge mode；If necessary to ensure outside metal pipe material
Footpath size, then use and outwards apply stressed bulging mode.
The size of mould needed for described step 3 is true according to the size of metal pipe material internal diameter to be processed or external diameter institute
It is fixed, wherein, it is smaller 0.5mm-0.8mm than part using the diameter of bulging mode mould, using the diameter of undergauge mode mould than zero
The big 0.1mm-0.3mm of part.
The voltage range that magnetic field impulse equipment is discharged in described step 5 is 5kV~20kV, discharge energy in 1kJ~25kJ,
Discharge time is 2~3 times.
The remarkable result of the present invention is：A kind of side for reducing or eliminating multilayer corrugated pipe interlayer spacings of the present invention
Method, solve the technical barrier that multilayer corrugated pipe used in airspace engine welds, welding quality greatly improved.
Brief description of the drawings
Fig. 1 is to use undergauge mode in a kind of method for reducing or eliminating multilayer corrugated pipe interlayer spacings of the present invention
The theory structure schematic diagram in gap between elimination multilayer thin-walled tube layer；
Fig. 2 is to use bulging mode in a kind of method for reducing or eliminating multilayer corrugated pipe interlayer spacings of the present invention
The theory structure schematic diagram in gap between elimination multilayer thin-walled tube layer.
Embodiment
Below in conjunction with the accompanying drawings and specific embodiment is described in further detail to the present invention.
As shown in Figure 1 and Figure 2, it is a kind of reduce or elimination multilayer corrugated pipe interlayer spacings method, this method specifically include as
Lower step：
Step 1, selection are appropriate for the metal pipe material of magnetic field impulse processing；
Selection includes aluminium, copper alloy, stainless steel multilayer metal pipe material, wherein, the thickness in monolayer of multiple layer metal tubing is 0.1
~0.5mm, a diameter of 100~200mm of Multilayer metal tube, length are 10~20mm, and 2~3 layers, metal pipe material gross thickness exists
It is 1.5mm following；
Step 2, the requirement according to product subsequent processing operations, select the suitable mode for eliminating interlayer spacings；
According to the requirement of product subsequent processing operations, if necessary to ensure metal pipe internal diameter size, then use such as Fig. 1 institutes
That shows inwardly applies stressed undergauge mode；If necessary to ensure metal tube outer diameter size, then using as shown in Figure 2 outside
Apply stressed bulging mode；
The size of step 3, measurement metal pipe material internal diameter to be processed or external diameter, it is determined that the size of required mould；
The size of metal pipe material internal diameter or external diameter to be processed is measured, it is determined that the size of required mould, wherein, using bulging side
The diameter of formula mould is smaller 0.5mm-0.8mm than part, bigger 0.1mm-0.3mm than part using the diameter of undergauge mode mould；
Step 4, pipe diameter size, thickness, material according to metal pipe material to be processed, will from different magnetic field impulse coils
Coil is arranged on outside bellows, and magnetic field impulse coil both ends are connected to the two poles of the earth of magnetic field impulse equipment；
Step 5, being discharged using magnetic field impulse equipment deforms bellows, eliminates bellows interlayer spacings, wherein, magnetic field impulse is set
The voltage range of standby electric discharge is 5kV~20kV, and for discharge energy in 1kJ~25kJ, discharge time is 2~3 times.
Claims (4)
- A kind of 1. method for reducing or eliminating multilayer corrugated pipe interlayer spacings, it is characterised in that：This method specifically includes following step Suddenly：Step 1, selection are appropriate for the metal pipe material of magnetic field impulse processing；Step 2, the requirement according to product subsequent processing operations, select the suitable mode for reducing or eliminating interlayer spacings；The mode for reducing or eliminating bellows interlayer spacings includes undergauge mode and bulging mode, wherein, if necessary to guarantee fund Belong to pipe internal diameter size, then use and inwardly apply stressed undergauge mode；If necessary to ensure metal tube outer diameter size, then adopt With outwards applying stressed bulging mode；The size of step 3, measurement metal pipe material internal diameter to be processed or external diameter, it is determined that the quantity and size of required mould；Step 4, pipe diameter size, thickness, material according to metal pipe material to be processed, from different magnetic field impulse coils, by coil In or beyond bellows, and magnetic field impulse coil both ends are connected to the two poles of the earth of magnetic field impulse equipment；Step 5, being discharged using magnetic field impulse equipment deforms bellows, reduces or eliminates bellows interlayer spacings；The voltage range of magnetic field impulse equipment electric discharge is 5kV~20kV, and for discharge energy in 1kJ~25kJ, discharge time is 2~3 times.
- A kind of 2. method for reducing or eliminating multilayer corrugated pipe interlayer spacings according to claim 1, it is characterised in that：Institute The metal pipe material of magnetic field impulse processing is appropriate in the step 1 stated includes aluminium, or copper alloy, or stainless steel multilayer metal pipe material.
- A kind of 3. method for reducing or eliminating multilayer corrugated pipe interlayer spacings according to claim 2, it is characterised in that：Institute The thickness in monolayer for the multiple layer metal tubing stated is 0.1~0.5mm, a diameter of 100~200mm of multiple layer metal tubing, length 10 ~20mm, 2~3 layers, metal pipe material gross thickness is in below 1.5mm.
- A kind of 4. method for reducing or eliminating multilayer corrugated pipe interlayer spacings according to claim 1, it is characterised in that：Institute The size of mould needed for the step 3 stated is determined according to the size of metal pipe material internal diameter to be processed or external diameter, wherein, use The diameter of bulging mode mould is bigger 0.5mm-0.8mm than part, smaller 0.1mm- than part using the diameter of undergauge mode mould 0.3mm。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410459818.XA CN105458058B (en) | 2014-09-11 | 2014-09-11 | A kind of method for reducing or eliminating multilayer corrugated pipe interlayer spacings |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410459818.XA CN105458058B (en) | 2014-09-11 | 2014-09-11 | A kind of method for reducing or eliminating multilayer corrugated pipe interlayer spacings |
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| CN105458058A CN105458058A (en) | 2016-04-06 |
| CN105458058B true CN105458058B (en) | 2017-11-28 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106964684B (en) * | 2017-03-31 | 2019-05-31 | 华中科技大学 | A kind of complex multi-step local plastic electromagnetic forming method suitable for sheet material workpiece |
| CN114192603A (en) * | 2021-12-14 | 2022-03-18 | 上海航天精密机械研究所 | Method for controlling interlayer redundancy and eliminating interlayer gap of multilayer metal corrugated pipe |
| CN115870366A (en) * | 2022-10-31 | 2023-03-31 | 江苏恒高电气制造有限公司 | Coaxial forming method for stainless steel multilayer corrugated pipe |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| FR2723329B1 (en) * | 1994-08-02 | 1996-09-13 | Inst Francais Du Petrole | METHOD AND DEVICE FOR MANUFACTURING A CORRUGATED METAL TUBE |
| CN101653803B (en) * | 2008-08-22 | 2011-03-02 | 首都航天机械公司 | Corrugated tube port magnetic-pulse precision corrector |
| CN101905375A (en) * | 2010-07-29 | 2010-12-08 | 哈尔滨工业大学 | Magnetic pulse connecting method and joint structure for thin-wall metal pipelines |
| CN103861933B (en) * | 2014-04-01 | 2015-11-25 | 湖南大学 | A kind of corrugated pipe forming device and the bellows processed with this device |
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Address after: 100076 Beijing, Fengtai District, South Road, No. 1, Co-patentee after: China Academy of Launch Vehicle Technology Patentee after: Capital Aerospace Machinery Co., Ltd. Address before: 100076 Beijing, Fengtai District, South Road, No. 1, Co-patentee before: China Academy of Launch Vehicle Technology Patentee before: Capital Aerospace Machinery Company |
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