CN103212604A - Hydraulic pressure expanding technology of double-layer metal composite welded pipe - Google Patents
Hydraulic pressure expanding technology of double-layer metal composite welded pipe Download PDFInfo
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- CN103212604A CN103212604A CN2012100155535A CN201210015553A CN103212604A CN 103212604 A CN103212604 A CN 103212604A CN 2012100155535 A CN2012100155535 A CN 2012100155535A CN 201210015553 A CN201210015553 A CN 201210015553A CN 103212604 A CN103212604 A CN 103212604A
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- welded pipe
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Abstract
The invention discloses a hydraulic pressure expanding technology of a double-layer metal composite welded pipe and belongs to the field of double-layer metal pipe production. The hydraulic pressure expanding technology comprises the following steps of carrying out outer welded pipe expanding, carrying out outer welded pipe rounding, carrying out outer welded pipe straightening, removing an inner welding line of an outer welded pipe, carrying out inner welded pipe expanding, carrying out inner welded pipe rounding, carrying out inner welded pipe straightening, removing an outer welding line of an inner welded pipe, sleeving the outer welded pipe on the inner welded pipe, and carrying out expanding in a hydraulic pressure expanding device, wherein plastic deformation amounts and springback amounts of the inner welded pipe and the outer welded pipe are different and the springback amount of the outer welded pipe is greater than the springback amount of the inner welded pipe and thus after pressure is unloaded, the outer welded pipe produces springback and firmly fastens the inner welded pipe so that the inner welded pipe and the outer welded pipe are fitted tightly and form the double-layer metal composite welded pipe. The hydraulic pressure expanding technology has a reasonable design, good effects and high size precision and realizes tight fitting of the inner and outer metal welded pipes.
Description
Technical field
The compound welded tube hydraulic pressure of double-level-metal of the present invention expanding technology belongs to pipeline manufacturing and manufacture field, is mainly used in the production of bimetal pipe.
Background technology
The compound welded tube of double-level-metal is a kind of novel high technology content pipeline, the mode of production that adopts two-layer welded tube to nest together, the general employing of two-layer welded tube has two kinds of different metal material manufacturings to form, inner tube adopts stainless steel or other wear-resistant material, very strong anticorrosive oxidation resistance is arranged, but cost an arm and a leg, the outer layer metal welded tube adopts common pipe line steel material, can provide good plasticity and shock resistance, good mechanical performance, price economy.Double layer of metal fits tightly together each other, form composite bimetal pipe, can effectively solve the technical barrier of energy high strength welded tube corrosion resistance difference, save production cost, satisfy continual extensive mode of movements such as oil, natural gas, reduce coefficient of friction, reduce the transporting resistance of material, and be convenient to processing, installation and the maintenance of pipeline.
Traditional individual layer welded tube is hole enlargement, full circle, alignment.Double-deck welded tube is after outer welded tube and internal layer welded tube are carried out hole enlargement, full circle, alignment respectively, the internal layer welded tube is inserted in the outer welded tube, because the amount of plastic deformation of outer welded tube and internal layer welded tube and springback capacity is different, inaccessible dimension precision requirement, the purpose that inaccessible inner and outer pipes fits tightly.
The hole enlargement and the main difference of conventional monolayers pipe hole enlargement of double-deck welded tube have 2 points: the one, certain clearance is arranged between the inner and outer pipes, thereby its enlarging rate difference, the deflection of pipe and outer tube in must taking into account simultaneously when determining the hole enlargement parameter, should reach dimension precision requirement, reach the purpose that inner and outer pipes fits tightly again; The 2nd, the bimetallic tube wall thickness needs bigger enlarging rate.
Summary of the invention
The object of the present invention is to provide the hydraulic pressure expanding technology of the compound welded tube of double-level-metal, produce the compound welded tube of satisfactory double-level-metal.
The technical solution adopted for the present invention to solve the technical problems is:
Outer welded tube hole enlargement, outer welded tube full circle, outer welded tube alignment, remove the inside weld of outer welded tube, the hole enlargement of internal layer welded tube, internal layer welded tube full circle, the alignment of internal layer welded tube, remove the outside weld of internal layer welded tube, the internal layer welded tube is inserted in the outer welded tube, send into the hydraulic pressure expanding machine and carry out hole enlargement, after shedding pressure, outer welded tube generation resilience with the firmly fastening of internal layer welded tube, forms the compound welded tube of bimetallic.At first to outer welded tube and the independent hole enlargement respectively of internal layer welded tube, eliminate the moulding stress and the welding stress of welded tube, the caliber of welded tube is expanded to the accuracy rating of dimensional requirement, carry out full circle and alignment again, its effect is to guarantee the circularity of ectonexine welded tube and straight degree, guarantee the gap error between two pipes, make things convenient for inner tube to put into outer tube.Then the mating surface of outer welded tube and internal layer welded tube is handled, outer welded tube through being up to the standards and internal layer welded tube are implemented the encapsulation operation, the internal layer welded tube is inserted in the outer welded tube, sends into the hydraulic pressure expanding machine by conveying roller and carry out hole enlargement, allow two root bead pipes firmly fit together.Because the amount of plastic deformation of outer welded tube and internal layer welded tube and springback capacity is different, the springback capacity of outer welded tube is greater than the springback capacity of internal layer welded tube, after shedding pressure, outer welded tube generation resilience, with the firmly fastening of internal layer welded tube, two-layer like this welded tube just can fit tightly together, forms the compound welded tube of bimetallic.
The present invention processes internal layer welded tube and outer welded tube separately at first respectively, outer welded tube hole enlargement, outer welded tube full circle, outer welded tube alignment, remove the inside weld of outer welded tube, the hole enlargement of internal layer welded tube, internal layer welded tube full circle, the alignment of internal layer welded tube, the outside weld of removing internal layer welded tube, to the internal layer welded tube, outer welded tube carries out ultrasonic examination and X-ray procedure, to the internal layer welded tube, the mating surface of outer welded tube is handled, through be up to the standards and surface treatment after, to the internal layer welded tube, outer welded tube is implemented the encapsulation operation, the internal layer welded tube is inserted in the outer welded tube, with the internal layer welded tube, in removing in the two ends 150mm scope of outer welded tube, the outside weld reinforcement is used the high pressure water washing steel duct, sends into the hydraulic pressure expanding machine by conveying roller and carries out hole enlargement, the compound welded tube of double-level-metal after the hydraulic pressure hole enlargement is carried out the bilayer check, repair end, carry out ultrasonic examination and X-ray procedure, pipe end magnetic powder test again, appearance test, stock.
The compound welded tube hydraulic pressure of double-level-metal of the present invention expander comprises by O pattern tool, lock module, hydraulic cylinder, sealing ring, hydraulic cylinder, clamping cylinder push strut, seal receptacle and seal head to be formed, O pattern tool is to be connected by axle by two semicircles, lock module connects hydraulic cylinder, lock module is a U type groove, the clamping cylinder push strut is set on the hydraulic cylinder, clamping cylinder push strut front end is provided with seal receptacle, and seal receptacle is provided with sealing ring, and seal receptacle is arranged on the seal head.
The present invention can finish effective manufacturing of novel double-layer metal composite welded tube, finishes fitting tightly of inside and outside double layer of metal welded tube.The present invention is reasonable in design, and is respond well, dimensional accuracy height, the purpose that inaccessible inner and outer pipes fits tightly.
Description of drawings
Accompanying drawing 1 is the composite bimetal pipe cutaway view.
Accompanying drawing 2 is bimetallic tube expanding technology flow charts.
Accompanying drawing 3 is that the hydraulic pressure expanding machine is to bimetallic tube hole enlargement structural representation.
Accompanying drawing 4 is that the hydraulic pressure expanding machine is to bimetallic tube hole enlargement structural representation.
The specific embodiment
The invention will be further described below in conjunction with accompanying drawing.
Among the figure: internal layer welded tube 1, outer welded tube 2, O pattern tool 3, lock module 4, hydraulic cylinder 5, sealing ring 6, hydraulic cylinder 7, clamping cylinder push strut 8, seal receptacle 9, seal head 10.
As shown in Figure 1, the double-level-metal multiple tube is to be closely cooperated mutually by internal layer welded tube 1 and outer welded tube 2 to form, general internal layer welded tube is made by stainless steel or other noncorroding metal material, and outer welded tube is mainly good by plasticity, intensity is high, and the pipe line steel material of good mechanical performance is made.
As shown in Figure 2, the compound welded tube hydraulic pressure of double-level-metal of the present invention expanding technology is as follows, separately internal layer welded tube and outer welded tube are processed at first respectively, outer welded tube hole enlargement, outer welded tube full circle, the inside weld of outer welded tube, the hole enlargement of internal layer welded tube are removed in outer welded tube alignment, internal layer welded tube full circle, the alignment of internal layer welded tube, the outside weld of removing internal layer welded tube, the moulding stress and the welding stress of elimination welded tube, the caliber of internal layer welded tube and outer welded tube is expanded to the accuracy rating of dimensional requirement, carrying out full circle and alignment is circularity and the straight degree that guarantees the ectonexine welded tube, guarantees the gap error between two pipes, makes things convenient for inner tube to put into outer tube.Internal layer welded tube, outer welded tube are carried out ultrasonic examination and X-ray procedure, mating surface to internal layer welded tube, outer welded tube is handled, mainly comprise cleaning dirt, rust cleaning, degreasing and texturing, surface treatment adopts special-purpose machinery to finish, and outer welded tube is once removed the dirt and the oxide of inner surface with ball blasting method; The internal layer welded tube adopts wire brush with surface texturing.Through be up to the standards and surface treatment after, internal layer welded tube, outer welded tube are implemented the encapsulation operation, the internal layer welded tube is inserted in the outer welded tube.With removing inside and outside weld reinforcement in the two ends 150mm scope of internal layer welded tube, outer welded tube, use the high pressure water washing steel duct, send into the hydraulic pressure expanding machine by conveying roller and carry out hole enlargement, allow two root bead pipes firmly fit together.The compound welded tube of double-level-metal after the hydraulic pressure hole enlargement is carried out the bilayer check, repair end, carry out ultrasonic examination and X-ray procedure again, pipe end magnetic powder test, appearance test, stock.
As accompanying drawing 3, as shown in Figure 4, the hydraulic pressure expander comprises by O pattern tool 3, lock module 4, hydraulic cylinder 5, sealing ring 6, hydraulic cylinder 7, clamping cylinder push strut 8, seal receptacle 9 and seal head 10 and forming, O pattern tool 3 is to be connected by axle by two semicircles, lock module 4 connects hydraulic cylinder 5, lock module 4 is U type grooves, and clamping cylinder push strut 8 is set on the hydraulic cylinder 7, and clamping cylinder push strut 8 front ends are provided with seal receptacle 9, seal receptacle 9 is provided with sealing ring 6, and seal receptacle 9 is arranged on the seal head 10.Open O pattern tool 3, the compound welded tube of double-level-metal that internal layer welded tube 1, outer welded tube 2 are nested together enters O pattern tool 3, closes up O pattern tool 3 then, and seal head 10 clamps and make the welded tube sealing, lock module 4 is under the promotion of hydraulic cylinder 5, and its U type groove clamps two halves O pattern tool 3.To the inner water under high pressure that injects of double-level-metal welded tube, make the distortion of double-level-metal welded tube total length diameter expansion, until reaching the dies cavity size, realize the whole hole enlargement of hydraulic pressure to the compound welded tube of double-level-metal.The hole enlargement amount satisfies the requirement of internal layer welded tube 1 and outer welded tube 2 simultaneously, reach release after the hole enlargement amount, this moment, internal layer welded tube 1 rebound phenomenon can occur with outer welded tube 2, the springback capacity of outer welded tube 2 is greater than the springback capacity of internal layer welded tube 1, realize the link closely effect of internal layer welded tube of outer welded tube, both firmly are closely linked.Unclamp clamping apparatus after the hole enlargement, open left and right sides two halves O pattern.
Claims (3)
1. the compound welded tube hydraulic pressure of double-level-metal expanding technology, outer welded tube hole enlargement, outer welded tube full circle, the inside weld of outer welded tube, the hole enlargement of internal layer welded tube are removed in outer welded tube alignment, internal layer welded tube full circle, the alignment of internal layer welded tube, the outside weld of removing internal layer welded tube, it is characterized in that the internal layer welded tube is inserted in the outer welded tube, send into the hydraulic pressure expanding machine and carry out hole enlargement, shed pressure after, outer welded tube generation resilience, with the firmly fastening of internal layer welded tube, form the compound welded tube of bimetallic.
2. the compound welded tube hydraulic pressure of double-level-metal according to claim 1 expanding technology, it is characterized in that separately internal layer welded tube and outer welded tube being processed at first respectively, outer welded tube hole enlargement, outer welded tube full circle, outer welded tube alignment, remove the inside weld of outer welded tube, the hole enlargement of internal layer welded tube, internal layer welded tube full circle, the alignment of internal layer welded tube, remove the outside weld of internal layer welded tube, to the internal layer welded tube, outer welded tube carries out ultrasonic examination and X-ray procedure, to the internal layer welded tube, the mating surface of outer welded tube is handled, through be up to the standards and surface treatment after, to the internal layer welded tube, outer welded tube is implemented the encapsulation operation, the internal layer welded tube is inserted in the outer welded tube, with the internal layer welded tube, in removing in the two ends 150mm scope of outer welded tube, the outside weld reinforcement, use the high pressure water washing steel duct, send into the hydraulic pressure expanding machine by conveying roller and carry out hole enlargement, the compound welded tube of the double-level-metal after the hydraulic pressure hole enlargement is carried out the bilayer check, repair end, carry out ultrasonic examination and X-ray procedure again, the pipe end magnetic powder test, appearance test, stock.
3. the compound welded tube hydraulic pressure of double-level-metal expander, it is characterized in that comprising by O pattern tool, lock module, hydraulic cylinder, sealing ring, hydraulic cylinder, clamping cylinder push strut, seal receptacle and seal head and form, O pattern tool is to be connected by axle by two semicircles, lock module connects hydraulic cylinder, lock module is a U type groove, and the clamping cylinder push strut is set on the hydraulic cylinder, and clamping cylinder push strut front end is provided with seal receptacle, seal receptacle is provided with sealing ring, and seal receptacle is arranged on the seal head.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100155535A CN103212604A (en) | 2012-01-18 | 2012-01-18 | Hydraulic pressure expanding technology of double-layer metal composite welded pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100155535A CN103212604A (en) | 2012-01-18 | 2012-01-18 | Hydraulic pressure expanding technology of double-layer metal composite welded pipe |
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| CN103212604A true CN103212604A (en) | 2013-07-24 |
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| CN2012100155535A Pending CN103212604A (en) | 2012-01-18 | 2012-01-18 | Hydraulic pressure expanding technology of double-layer metal composite welded pipe |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104785649A (en) * | 2015-05-02 | 2015-07-22 | 汪浩 | Pipeline welding seam stress relief device adopting liquid nitrogen expanding |
Citations (6)
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| JPS63171217A (en) * | 1987-01-08 | 1988-07-15 | Nippon Steel Corp | Device for manufacturing composite bar excellent in vibration absorbing performance |
| JPH08332534A (en) * | 1995-06-07 | 1996-12-17 | Sumitomo Light Metal Ind Ltd | Manufacture for metallic double pipe and device therefor |
| CN2475487Y (en) * | 2001-02-27 | 2002-02-06 | 番禺珠江钢管有限公司 | Hydraulic diameter expander |
| CN101234406A (en) * | 2007-02-01 | 2008-08-06 | 偃师市安力电力设备有限公司 | Method for manufacturing multiunit tube |
| CN201470785U (en) * | 2009-08-03 | 2010-05-19 | 江苏众信绿色管业科技有限公司 | Bimetal multi-unit tube metal spinning combined device |
| CN102159337A (en) * | 2008-12-19 | 2011-08-17 | 现代Hysco株式会社 | Multi-layer tube using high-pressure tube-hydroforming and manufacturing method thereof |
-
2012
- 2012-01-18 CN CN2012100155535A patent/CN103212604A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63171217A (en) * | 1987-01-08 | 1988-07-15 | Nippon Steel Corp | Device for manufacturing composite bar excellent in vibration absorbing performance |
| JPH08332534A (en) * | 1995-06-07 | 1996-12-17 | Sumitomo Light Metal Ind Ltd | Manufacture for metallic double pipe and device therefor |
| CN2475487Y (en) * | 2001-02-27 | 2002-02-06 | 番禺珠江钢管有限公司 | Hydraulic diameter expander |
| CN101234406A (en) * | 2007-02-01 | 2008-08-06 | 偃师市安力电力设备有限公司 | Method for manufacturing multiunit tube |
| CN102159337A (en) * | 2008-12-19 | 2011-08-17 | 现代Hysco株式会社 | Multi-layer tube using high-pressure tube-hydroforming and manufacturing method thereof |
| CN201470785U (en) * | 2009-08-03 | 2010-05-19 | 江苏众信绿色管业科技有限公司 | Bimetal multi-unit tube metal spinning combined device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104785649A (en) * | 2015-05-02 | 2015-07-22 | 汪浩 | Pipeline welding seam stress relief device adopting liquid nitrogen expanding |
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Application publication date: 20130724 |