CN109570296A - A kind of bending method of Stainless Steel U pipe - Google Patents
A kind of bending method of Stainless Steel U pipe Download PDFInfo
- Publication number
- CN109570296A CN109570296A CN201811543064.0A CN201811543064A CN109570296A CN 109570296 A CN109570296 A CN 109570296A CN 201811543064 A CN201811543064 A CN 201811543064A CN 109570296 A CN109570296 A CN 109570296A
- Authority
- CN
- China
- Prior art keywords
- pipe fitting
- support device
- internal support
- voussoir
- pipe
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D9/00—Bending tubes using mandrels or the like
- B21D9/01—Bending tubes using mandrels or the like the mandrel being flexible and engaging the entire tube length
- B21D9/03—Bending tubes using mandrels or the like the mandrel being flexible and engaging the entire tube length and built-up from loose elements, e.g. series of balls
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D9/00—Bending tubes using mandrels or the like
- B21D9/05—Bending tubes using mandrels or the like co-operating with forming members
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D9/00—Bending tubes using mandrels or the like
- B21D9/16—Auxiliary equipment, e.g. machines for filling tubes with sand
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Bending Of Plates, Rods, And Pipes (AREA)
Abstract
Proposed by the present invention is a kind of bending method of Stainless Steel U pipe.It bends and includes the following steps: to prepare before (1) is curved: having measured pipe fitting and bent the size of chipware, the internal support device for bending U-tube is sequentially loaded into pipe fitting, reality is blocked up into the end of pipe fitting using sealing plate, is welded.(2) it bends: using pin shaft and the fixed pipe fitting of pin cap, and pipe fitting being bent into molding using molding die.(3) thermal finalization: the molding die equipped with pipe fitting is put into heat-treatment furnace and is heated；Pipe fitting keeps the temperature 1 hour by 25mm thickness and calculates to after 550 DEG C, determines soaking time, after the completion of insulating process, furnace cooling；Pin cap is destroyed, pipe fitting is hung out from molding die, completes Stainless Steel U pipe forming process.The present invention is arranged in stainless steel straight tube by the entity stripping and slicing segmented being made of three voussoirs, as the internal support device for bending U-tube, provides rigid support to bend molding, and realize removably purpose.It is suitable for the bending method application as a kind of Stainless Steel U pipe.
Description
Technical field
Proposed by the present invention is the U-tube bending method in nuclear power equipment manufacturing field, is mainly used in and bends heavy caliber thickness
Wall stainless steel tube.Specifically a kind of bending method of Stainless Steel U pipe.
Background technique
Currently, heavy caliber thick wall U-tube is difficult one-pass molding using hydraulic press and conventional mold, it is accurate to be especially difficult to
The outer dimension for controlling pipe fitting, needs repeatedly to be corrected.
Due to needing to pay attention to ovality when the molding of Stainless Steel U pipe, while the parameters such as reduction and bounce angle, and need
Pay attention to the radial rigidity requirement of pipe fitting, it is also necessary to take out rigid internal stay tool.Therefore molding difficulty is big, and accuracy rate is low.
Summary of the invention
In order to overcome existing heavy wall Stainless Steel U pipe to bend the exceeded disadvantage of molding ovality, the invention proposes one kind
The bending method of Stainless Steel U pipe.This method is provided radial rigidity by rigid internal support device and propped up when pipe fitting bending deformation
Support solves Stainless Steel U pipe and bends the exceeded technical problem of molding ovality.
The solution adopted by the present invention to solve the technical problem is that:
Middle part is provided with tune internal support device in straight tube, both ends are provided with straight section internal support device, and straight tube two-port is equipped with sealing plate,
Rope passes through straight tube inner cavity and is connected to outside sealing plate；
Tune internal support device is made of with straight section internal support device the stripping and slicing that segmented is connect, and stripping and slicing is the entity of axial rectangle,
Each stripping and slicing is by three pieces of voussoirs of non-equal part, and upper voussoir, middle voussoir and lower wedge block composition, three pieces of voussoirs face that contacts with each other is oblique
Face；The axial direction of each voussoir is equipped with the guide groove or guide rail of rectangular taper, and lower wedge block is equipped with shoulder block in its small end conicity,
Upper surface is equipped with guide rail；Middle voussoir upper surface is equipped with guide rail, and lower surface is equipped with guide groove, and radially two sides are equipped with handling button connection
Rope；The lower surface of upper voussoir is equipped with guide groove.
The stripping and slicing is made of three pieces of voussoirs, folds one entirety of completion during installation, upper voussoir, middle voussoir and lower wedge block connect
Guide groove and guide rail in contacting surface axially retain the freedom degree of voussoir and middle voussoir, pipe fitting are facilitated to bend to its radial positioning
It is taken out after molding.
It bends and includes the following steps:
(1) curved preceding preparation:
It has measured pipe fitting and has bent the size of chipware, the internal support device for bending U-tube has been sequentially loaded into pipe fitting, it will using sealing plate
The end of pipe fitting is stifled in fact, welds.
(2) it bends: using pin shaft and the fixed pipe fitting of pin cap, and pipe fitting being bent into molding using molding die.
(3) thermal finalization: the molding die equipped with pipe fitting is put into heat-treatment furnace and is heated；
Pipe fitting keeps the temperature 1 hour by 25mm thickness and calculates to after 550 DEG C, determines soaking time, cold with furnace after the completion of insulating process
But；
Pin cap is destroyed, pipe fitting is hung out from molding die, completes Stainless Steel U pipe forming process.
(4) installation of internal support device:
1., measure pipe fitting and bend the size of internal support device, calculate the position of straight section inner support and tune inner support, determine inner support fill
The position set；
2., rope one end is fixed on every piece of voussoir, after every group of stripping and slicing is installed, the other end of rope is extended into pipe fitting end
Outside mouthful；
3., internal support device segmentation is sequentially loaded into straight tube, and it is using sealing plate that the end of straight tube is stifled real, weld, ensure simultaneously
Rope is outside the two-port of straight tube.
(5) disassembly of internal support device:
1., after pipe fitting bent, end socket is dismantled using carbon arc type gas gouging machine；
2., tense rope voussoir is pulled out, every group of internal support device is successively taken out, until whole taking-ups.
Good effect, the present invention are arranged by the entity stripping and slicing segmented that the axial direction being made of three voussoirs is approximately rectangle
It connects together in stainless steel straight tube, and with rope, as the internal support device for bending U-tube, is provided to bend molding
Rigid support, prevents that pipe fitting from collapsing in forming process and ovality is exceeded, and realizes removably purpose.It is suitable for making
For a kind of bending method application of Stainless Steel U pipe.
Detailed description of the invention
Fig. 1 is internal support device scheme of installation of the invention；
Fig. 2 is internal support device stripping and slicing axial direction schematic diagram of the present invention；
Fig. 3 is internal support device stripping and slicing radial direction schematic diagram of the present invention；
Fig. 4 is that bend pipe bends schematic diagram；
Fig. 5 is heat processing technique figure of the present invention.
In figure, 1. straight tubes, 2. tune internal support devices, 2.1. straight section internal support device, 3. sealing plates, 4. ropes, 5. strippings and slicings, 5.1.
Upper voussoir, voussoir in 5.2., 5.3. lower wedge block, 5.4. guide rail, 5.5. guide groove, 5.6. shoulder block, the inclined-plane 5.7., 5.8. handling
Button.
Specific embodiment
According to the figure, middle part is provided with tune internal support device 2 in straight tube 1, both ends are provided with straight section internal support device 2.1,
Straight tube two-port is equipped with sealing plate 3, and rope 4 passes through straight tube inner cavity and is connected to outside sealing plate；
Tune internal support device is formed with the stripping and slicing 5 that straight section internal support device is connect by segmented, and stripping and slicing is the entity of axial rectangle,
Three piece voussoirs of each stripping and slicing by non-equal part, upper voussoir 5.1, middle voussoir 5.2 and the composition of lower wedge block 5.3, three pieces of voussoir phase mutual connections
Contacting surface is inclined-plane 5.7；The axial direction of each voussoir is equipped with the guide groove 5.5 or guide rail 5.4 of rectangular taper, and lower wedge block is at it
Small end conicity is equipped with shoulder block 5.6, and upper surface is equipped with guide rail；Middle voussoir upper surface is equipped with guide rail, and lower surface is equipped with guide groove, radial
Upper two sides are equipped with 5.8 connection rope of handling button；The lower surface of upper voussoir is equipped with guide groove.
The stripping and slicing is made of three pieces of voussoirs, folds one entirety of completion during installation, upper voussoir, middle voussoir and lower wedge block connect
Guide groove and guide rail in contacting surface axially retain the freedom degree of voussoir and middle voussoir, pipe fitting are facilitated to bend to its radial positioning
It is taken out after molding.
The inclined-plane that three pieces of voussoirs contact with each other in the straight section internal support device, which is changed into, to be faced directly.
The straight tube is stainless steel tube.
It bends and includes the following steps:
(1) curved preceding preparation:
It has measured pipe fitting and has bent the size of chipware, the internal support device for bending U-tube has been sequentially loaded into pipe fitting, it will using sealing plate
The end of pipe fitting is stifled in fact, welds.
(2) it bends: using pin shaft and the fixed pipe fitting of pin cap, and pipe fitting being bent into molding using molding die.
(3) thermal finalization: the molding die equipped with pipe fitting is put into heat-treatment furnace and is heated；
Pipe fitting keeps the temperature 1 hour by 25mm thickness and calculates to after 550 DEG C, determines soaking time, cold with furnace after the completion of insulating process
But；
Pin cap is destroyed, pipe fitting is hung out from molding die, completes Stainless Steel U pipe forming process.
(4) installation of internal support device:
1., measure pipe fitting and bend the size of internal support device, calculate the position of straight section inner support and tune inner support, determine inner support fill
The position set；
2., rope one end is fixed on every piece of voussoir, after every group of stripping and slicing is installed, the other end of rope is extended into pipe fitting end
Outside mouthful；
3., internal support device segmentation is sequentially loaded into straight tube, and it is using sealing plate that the end of straight tube is stifled real, weld, ensure simultaneously
Rope is outside the two-port of straight tube.
(5) disassembly of internal support device:
1., after pipe fitting bent, end socket is dismantled using carbon arc type gas gouging machine；
2., tense rope voussoir is pulled out, every group of internal support device is successively taken out, until whole taking-ups.
The working principle of the invention:
Internal support device is divided into straight section internal support device and tune internal support device, and tune internal support device is arranged in the middle section of straight tube, straight tube
Straight section internal support device is arranged in both ends.Internal support device is segmentation structure, the axial stripping and slicing entity for rectangle, and each rectangle
Stripping and slicing entity is made of three pieces of voussoir entities of non-equal part, and the faying face of three pieces of voussoir entities is inclined-plane, is led on axial direction
Rail limits the glide direction of voussoir in guide groove, and guide groove is equipped with taper, and small size end is equipped with shoulder block, in every group of stripping and slicing
The shoulder block of outside voussoir is opposite, so that passing through the guide rail of three pieces of voussoirs always in guide groove.
Tune internal support device is mounted on the brake forming position under straight tube state, and voussoir contact of incline plane forms curvature, for pipe
Part provides radial rigid support when bending molding, and to prevent pipe fitting in song deformation, the radial direction of pipe fitting is collapsed.
Straight section internal support device is mounted on the straight section position under straight tube state, and three pieces of voussoir contact surfaces are to face directly in stripping and slicing,
Radial rigid support is provided at the time of molding, prevents pipe fitting when bending operation, straight part deforms.
The handling button that is radially provided with of every piece of voussoir connects rope, dismantles so that operator is not necessarily to enter inside caliber
Operation, can smoothly take out internal support device outside pipe fitting, and completion bends disassembly after molding.
The features of the present invention:
Since voussoir uses rigid material, the internal support device of composition provides rigid support for U-tube molding, can prevent pipe fitting from existing
It is collapsed in forming process and ovality is exceeded.
Due to linking together between voussoir using rope, the purpose of handling can be realized.
Claims (4)
1. a kind of bending method of Stainless Steel U pipe, includes the following steps: it is characterized in that: bending
(1) curved preceding preparation:
It has measured pipe fitting and has bent the size of chipware, the internal support device for bending U-tube has been sequentially loaded into pipe fitting, it will using sealing plate
The end of pipe fitting is stifled in fact, welds；
(2) it bends: using pin shaft and the fixed pipe fitting of pin cap, and pipe fitting being bent into molding using molding die；
(3) thermal finalization: the molding die equipped with pipe fitting is put into heat-treatment furnace and is heated；
Pipe fitting keeps the temperature 1 hour by 25mm thickness and calculates to after 550 DEG C, determines soaking time, cold with furnace after the completion of insulating process
But；
Pin cap is destroyed, pipe fitting is hung out from molding die, completes Stainless Steel U pipe forming process；
(4) installation of internal support device:
1., measure pipe fitting and bend the size of internal support device, calculate the position of straight section inner support and tune inner support, determine inner support fill
The position set；
2., rope one end is fixed on every piece of voussoir, after every group of stripping and slicing is installed, the other end of rope is extended into pipe fitting end
Outside mouthful；
3., internal support device segmentation is sequentially loaded into straight tube, and it is using sealing plate that the end of straight tube is stifled real, weld, ensure simultaneously
Rope is outside the two-port of straight tube；
(5) disassembly of internal support device:
1., after pipe fitting bent, end socket is dismantled using carbon arc type gas gouging machine；
2., tense rope voussoir is pulled out, every group of internal support device is successively taken out, until whole taking-ups.
2. a kind of device that the bending method of Stainless Steel U pipe uses described in claim 1 is applied, it is characterized in that:
Middle part is provided with tune internal support device (2) in straight tube (1), both ends are provided with straight section internal support device (2.1), straight tube both ends
Mouth is equipped with sealing plate (3), and rope (4) passes through straight tube inner cavity and is connected to outside sealing plate；
The stripping and slicing (5) that tune internal support device is connect with straight section internal support device by segmented forms, and stripping and slicing is the reality of axial rectangle
Body, three piece voussoirs of each stripping and slicing by non-equal part, upper voussoir (5.1), middle voussoir (5.2) and lower wedge block (5.3) composition, three pieces of wedges
Block contacts with each other face as inclined-plane (5.7)；The axial direction of each voussoir is equipped with the guide groove (5.5) or guide rail of rectangular taper
(5.4), lower wedge block is equipped with shoulder block (5.6) in its small end conicity, and upper surface is equipped with guide rail；Middle voussoir upper surface is equipped with guide rail, under
Surface is equipped with guide groove, and radially two sides are equipped with handling button (5.8) and connect rope；The lower surface of upper voussoir is equipped with guide groove.
3. the device that a kind of bending method of Stainless Steel U pipe according to claim 2 uses, it is characterized in that: described cut
Block is made of three pieces of voussoirs, folds one entirety of completion, the guide groove on upper voussoir, middle voussoir and lower wedge block contact surface during installation
With guide rail to its radial positioning, the freedom degree of voussoir and middle voussoir is axially retained, is taken out after facilitating pipe fitting to bend molding.
4. the device that a kind of bending method of Stainless Steel U pipe according to claim 2 uses, it is characterized in that: described straight
The inclined-plane that three pieces of voussoirs contact with each other in section internal support device, which is changed into, to be faced directly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811543064.0A CN109570296A (en) | 2018-12-17 | 2018-12-17 | A kind of bending method of Stainless Steel U pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811543064.0A CN109570296A (en) | 2018-12-17 | 2018-12-17 | A kind of bending method of Stainless Steel U pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109570296A true CN109570296A (en) | 2019-04-05 |
Family
ID=65930455
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811543064.0A Pending CN109570296A (en) | 2018-12-17 | 2018-12-17 | A kind of bending method of Stainless Steel U pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109570296A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110792861A (en) * | 2019-10-31 | 2020-02-14 | 刘锡多 | Internal support device of pipeline crimping connector and full-bore crimping connection method |
| CN112024723A (en) * | 2020-08-21 | 2020-12-04 | 江苏恒高电气制造有限公司 | GIL small-angle shell bending device |
| CN113967703A (en) * | 2021-10-20 | 2022-01-25 | 贵州永红航空机械有限责任公司 | Bending forming device and method for high-temperature alloy large-radian thin-wall capillary heat-dissipation tube |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3147328A1 (en) * | 1980-12-01 | 1982-07-08 | Dietzel GmbH, 1051 Wien | Apparatus for producing a hollow body, for example a pipe bend |
| CN101244443A (en) * | 2008-03-27 | 2008-08-20 | 二重集团（德阳）重型装备股份有限公司 | Combined shaping mold |
| CN101367099A (en) * | 2007-08-14 | 2009-02-18 | 西北工业大学 | Flexible bend pipe core mould |
| CN202290918U (en) * | 2011-08-18 | 2012-07-04 | 凌云工业股份有限公司 | Core for arching bumper with small bending radius |
| CN105478595A (en) * | 2016-01-20 | 2016-04-13 | 二重集团（德阳）重型装备股份有限公司 | Gap type manufactured core die of nuclear power voltage stabilizer fluctuation pipe and manufacturing method |
| CN206296340U (en) * | 2016-12-28 | 2017-07-04 | 安徽江淮汽车集团股份有限公司 | Bending fixture |
| CN207592508U (en) * | 2017-11-30 | 2018-07-10 | 上海白云汽车油管有限公司 | Compound cavity bending machining equipment |
-
2018
- 2018-12-17 CN CN201811543064.0A patent/CN109570296A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3147328A1 (en) * | 1980-12-01 | 1982-07-08 | Dietzel GmbH, 1051 Wien | Apparatus for producing a hollow body, for example a pipe bend |
| CN101367099A (en) * | 2007-08-14 | 2009-02-18 | 西北工业大学 | Flexible bend pipe core mould |
| CN101244443A (en) * | 2008-03-27 | 2008-08-20 | 二重集团（德阳）重型装备股份有限公司 | Combined shaping mold |
| CN202290918U (en) * | 2011-08-18 | 2012-07-04 | 凌云工业股份有限公司 | Core for arching bumper with small bending radius |
| CN105478595A (en) * | 2016-01-20 | 2016-04-13 | 二重集团（德阳）重型装备股份有限公司 | Gap type manufactured core die of nuclear power voltage stabilizer fluctuation pipe and manufacturing method |
| CN206296340U (en) * | 2016-12-28 | 2017-07-04 | 安徽江淮汽车集团股份有限公司 | Bending fixture |
| CN207592508U (en) * | 2017-11-30 | 2018-07-10 | 上海白云汽车油管有限公司 | Compound cavity bending machining equipment |
Non-Patent Citations (1)
| Title |
|---|
| 陈力: "非平面U型管件制造工艺改进方法", 锅炉技术, vol. 46, no. 02, pages 51 - 57 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110792861A (en) * | 2019-10-31 | 2020-02-14 | 刘锡多 | Internal support device of pipeline crimping connector and full-bore crimping connection method |
| CN112024723A (en) * | 2020-08-21 | 2020-12-04 | 江苏恒高电气制造有限公司 | GIL small-angle shell bending device |
| CN113967703A (en) * | 2021-10-20 | 2022-01-25 | 贵州永红航空机械有限责任公司 | Bending forming device and method for high-temperature alloy large-radian thin-wall capillary heat-dissipation tube |
| CN113967703B (en) * | 2021-10-20 | 2023-05-05 | 贵州永红航空机械有限责任公司 | High-temperature alloy large-radian thin-wall capillary radiating pipe bending forming device and method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109570296A (en) | A kind of bending method of Stainless Steel U pipe | |
| CN102581076B (en) | Accurate rounding method of large-diameter metal cylinder body | |
| PT2285507E (en) | Method for producing a large steel tube | |
| BR112014029007B1 (en) | tube expansion method for making metal tube | |
| JP5262746B2 (en) | Pipe end shape correction method for UOE metal pipe | |
| JP5256376B2 (en) | Method of manufacturing cooling element for dry metallurgical reactor and cooling element | |
| CN114309127B (en) | Inner wall surfacing small bending radius bent pipe and forming method thereof | |
| CN102430626B (en) | Thin-wall equant (small)-radius elbow secondary forming device and secondary forming method thereof | |
| CN209613875U (en) | Bend Stainless Steel U pipe internal support device | |
| CN101724744A (en) | Double-P type radiant tube and manufacture method thereof | |
| CN205236695U (en) | Crooked special mould of improved generation thin -wall tube | |
| CN109622692A (en) | Bend Stainless Steel U pipe internal support device | |
| CN206862174U (en) | A kind of double pipe heat exchanger | |
| JP5687182B2 (en) | Heat transfer tube with leak detection function and outer tube used for it | |
| JP6159352B2 (en) | Production method of expansion | |
| KR20090083050A (en) | Forming method of a long neck flange using upsetting and expanding | |
| CN108714768A (en) | A kind of diameter reduced mechanical composite tube processing method | |
| CN105689473A (en) | Tooling device for manufacturing buffering loop of pressure gauge of nuclear power plant | |
| CN214184664U (en) | Shaping tool for cold-bending forming of bent pipe with straight pipe sections at two ends | |
| CN104128404A (en) | Thin walled pipe bending technology and device | |
| JP2018183787A (en) | Method of manufacturing steel pipe | |
| CN209532458U (en) | A kind of pre-processing system with non-centripetal canals | |
| CN206943663U (en) | A kind of seamless steel alloy HTHP elbow of the butt welding with straight length | |
| CN111843257B (en) | Heat exchanger header inner side rounding device and heat exchanger header welding method | |
| CN113102579B (en) | Small-radius bent pipe manufacturing device and using method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |