CN108405685A - A kind of production method and tooling of deep camber coiled pipe - Google Patents
A kind of production method and tooling of deep camber coiled pipe Download PDFInfo
- Publication number
- CN108405685A CN108405685A CN201810311314.1A CN201810311314A CN108405685A CN 108405685 A CN108405685 A CN 108405685A CN 201810311314 A CN201810311314 A CN 201810311314A CN 108405685 A CN108405685 A CN 108405685A
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- Prior art keywords
- stent
- coiled pipe
- mould
- rotation mould
- rotation
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- 238000004519 manufacturing process Methods 0.000 title claims description 27
- 230000009466 transformation Effects 0.000 claims abstract description 32
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 27
- 239000010959 steel Substances 0.000 claims abstract description 27
- 238000000034 method Methods 0.000 claims abstract description 17
- 230000008569 process Effects 0.000 claims abstract description 12
- 239000004576 sand Substances 0.000 claims description 6
- 239000000725 suspension Substances 0.000 claims description 5
- 230000000977 initiatory effect Effects 0.000 claims description 3
- 238000005452 bending Methods 0.000 abstract description 14
- 238000012545 processing Methods 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 2
- 230000007547 defect Effects 0.000 description 5
- 238000013461 design Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 3
- 208000037656 Respiratory Sounds Diseases 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- 241000270295 Serpentes Species 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 210000002219 extraembryonic membrane Anatomy 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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
- B21D11/00—Bending not restricted to forms of material mentioned in only one of groups B21D5/00, B21D7/00, B21D9/00; Bending not provided for in groups B21D5/00 - B21D9/00; Twisting
- B21D11/06—Bending into helical or spiral form; Forming a succession of return bends, e.g. serpentine form
- B21D11/07—Making serpentine-shaped articles by bending essentially in one plane
-
- 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
- B21D11/00—Bending not restricted to forms of material mentioned in only one of groups B21D5/00, B21D7/00, B21D9/00; Bending not provided for in groups B21D5/00 - B21D9/00; Twisting
- B21D11/22—Auxiliary equipment, e.g. positioning devices
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing Of Tubular Articles Or Embedded Moulded Articles (AREA)
Abstract
A kind of making tooling of deep camber coiled pipe provided by the present invention; including stent and rotation mould; it is cylindrical structure; side is equipped with identical arc slot; the side of the side and stent that rotate mould is tangent always; a diameter of coiled pipe transformation segment internal diameter of stent arc slot bottom, on the longitudinal section of the tangent, the circular hole that two arc slots are surrounded can just pass through coiled pipe.When operation, steel pipe to be curved is placed in the circular hole that arc slot is enclosed at point of contact, driving rotation mould is rotated relative to stent, steel pipe is set to bend in the pressure that rotation process generates, stent and rotation mould cooperate, and coiled pipe transformation segment is made, and entire stewing bending process processed is determined by the tool structure designed completely, not by man's activity, to which the curvature quality requirement of coiled pipe transformation segment and ellipticity after processing be effectively ensured.
Description
Technical field
The invention belongs to equipment manufacturing technology field, more particularly to a kind of the production method and tooling of deep camber coiled pipe.
Background technology
Tuyere big sleeve is blast furnace air-supply arrangement connection blast furnace furnace wall and the important component for carrying blowing device, entirety
In barrel-shaped shape is bored, jacket wall is formed by cast iron and snakelike pipe casing, and the quality of coiled pipe (as shown in Fig. 1) determines tuyere big sleeve
Cooling efficiency, service life and the qualification rate of casting, and the Inlet and outlet water transformation segment of the coiled pipe steel of 45 wall thickness 4.5 of outer diameter φ
Pipe, radius of curvature R 90,180 ° of curvature of angle are big, especially easily cause that section becomes smaller, is oval, curvature is overproof, contracting in bending process
The defects of diameter, cracked etc., the expansion of coiled pipe materials is long more than 60 meters, to avoid manufacturing defect from reducing coupling to the greatest extent,
So transformation segment must be made with whole stewing of pipe of 45*9 meters of φ.Since coiled pipe belongs to cone barrel shaped structure, bending machine does not have
Method application, and bending machine buying expenses are expensive, and utilization rate is low, fills husky fire bending process using the husky flame fire bending of dress always before this
In mostly use manual operation greatly, flame temperature is difficult to control easily cracked, and since the curvature of coiled pipe transformation segment is frequent greatly
Occur section become smaller, be oval, undergauge, there is obstructed ball when logical ball is tested, the case where suppressing only.
Thus, how to overcome drawbacks described above, is those skilled in the art's technical problem urgently to be resolved hurrily.
Invention content
The present invention provides a kind of production methods and tooling of deep camber coiled pipe, instead of existing flame heating operation
Method improves the defects of being carried out stewing system using design tooling, avoided cracked coiled pipe, oval, undergauge, overproof curvature
Coiled pipe production quality and efficiency reduce manufacturing cost.
In order to solve the above technical problems, the present invention provides a kind of making tooling of deep camber coiled pipe, including stent
It is the cylindrical structure that side is equipped with identical arc slot with rotation mould, the side of the side and the stent of the rotation mould
Always tangent, a diameter of coiled pipe transformation segment internal diameter of the stent arc slot bottom, on the longitudinal section of the tangent, two
The round hole that the arc slot is surrounded can just be by the coiled pipe.
Preferably, further include the link of the connection stent and the rotation mould in above-mentioned making tooling.
Preferably, it in above-mentioned making tooling, is additionally provided on the link and is driven for providing the rotation mould rotation
The rope bolt of power, rope, which is set on the rope bolt, pulls the rotation mould to be rotated around the stent.
Preferably, in above-mentioned making tooling, the link is U-shaped framework, the U-shaped framework include two side plates and
The middle connecting plate of described both side plate one end is connected, the stent and the rotation mould may be contained between described two side plates
And it is connect with described two side plates by central shaft.
Preferably, in above-mentioned making tooling, the stent and the rotation mould pass through the first central shaft and respectively
Two central shafts are fixed on described two side plates；The stent is fastenedly connected with first central shaft, the rotation mould with
Second central shaft is fastenedly connected or is rotatably connected.
Preferably, further include platform in above-mentioned making tooling, first central shaft is fixed on the platform, institute
Platform setting is stated to be provided with the several of suspension centre and hang nose.
Preferably, in above-mentioned making tooling, the rotation mould is rotatably set on the link.
This programme also provides a kind of production method of deep camber coiled pipe, using above-mentioned making tooling, the production method
Including：
The built-in sand of step 1) steel pipe to be processed；
The coiled pipe transformation segment initiating terminal of steel pipe to be processed is placed in the stent to step 2) and the rotation mould is tangent
In the round hole at place, the rotation mould is driven to be rotated relative to the stent, until coiled pipe transformation segment end stops.
Preferably, in above-mentioned production method, further include that step 3) is husky to the steel pipe, lead to ball and suppress process.
Preferably, in above-mentioned production method, the making tooling further includes connecting the stent and the rotation mould
Link, pull the link that the rotation mould is driven to be rotated around the stent by driving a vehicle in the step 2).
A kind of making tooling of deep camber coiled pipe provided by the present invention, including stent and rotation mould, are cylinder
Body structure, cylindrical structure side are equipped with identical arc slot, and the side of the side and stent that rotate mould is tangent always, stent arc
A diameter of coiled pipe transformation segment internal diameter of slot bottom, on the longitudinal section of the tangent, the round hole that two arc slots are surrounded can just
Enough pass through coiled pipe.When operation, the steel pipe to be bent at coiled pipe transformation segment is set to the circular hole that the arc slot at point of contact is enclosed
In, driving rotation mould is rotated relative to stent, and the pressure generated in rotation process makes steel pipe generate bending, stent and rotation
Mould cooperates, and coiled pipe transformation segment is made, and entire stewing bending process processed is determined by the tool structure designed completely, not by artificial
Influence, to be effectively ensured processing after coiled pipe transformation segment curvature quality requirement and ellipticity.
The present invention also provides the production methods of the deep camber coiled pipe of the above-mentioned making tooling of application, instead of existing fire
Flame heating operation method carries out stewing system using design tooling, avoids cracked coiled pipe, oval, undergauge, curvature overproof etc. and lack
It falls into, improves coiled pipe production quality and efficiency, reduce manufacturing cost.
Description of the drawings
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
The embodiment of invention for those of ordinary skill in the art without creative efforts, can also basis
The attached drawing of offer obtains other attached drawings.
Fig. 1 is a kind of front view of the making tooling for deep camber coiled pipe that this programme provides；
Fig. 2 is a kind of vertical view of the making tooling for deep camber coiled pipe that this programme provides；
Fig. 3 is a kind of structural schematic diagram of the making tooling for deep camber coiled pipe that this programme provides.
In upper figure：
Stent 1, first rotating shaft 3, the second shaft 4, link 5, rope bolt 6, hangs nose 7, platform 8, coiled pipe at rotation mould 2
9, coiled pipe transformation segment 901.
Specific implementation mode
The present invention provides a kind of production methods and tooling of deep camber coiled pipe, instead of existing flame heating operation
Method improves the defects of being carried out stewing system using design tooling, avoided cracked coiled pipe, oval, undergauge, overproof curvature
Coiled pipe production quality and efficiency reduce manufacturing cost.
In order to make those skilled in the art more fully understand technical solution provided by the invention, below in conjunction with attached drawing and
The present invention is described in further detail for specific embodiment.
It please refers to Fig.1, Fig. 2 and Fig. 3, a kind of making tooling of deep camber coiled pipe provided by the present invention, including fixation
Mould 1 and rotation mould 2, are cylindrical structure, and cylindrical structure side is equipped with identical arc slot, rotate side and the stent 1 of mould 2
Side it is tangent always, a diameter of 901 internal diameter of coiled pipe transformation segment of 1 arc slot bottom of stent, on the longitudinal section of the tangent, two
The circular hole that a arc slot is surrounded can just pass through coiled pipe, i.e. the enclosed circular dimension of two arc slots and coiled pipe transformation segment 901
Size is identical.
Stent 1 and rotation mould 2 are cylindrical structure, are made of two bottom surfaces and a side.Stent 1 and rotation mould
Arc slot on 2 is referred to as the first arc slot and the second arc slot, and the size of the first arc slot and the second arc slot is identical, is respectively intended to
Pressing mold as 901 curved interior part and curved outside part of coiled pipe transformation segment.The tube wall of coiled pipe transformation segment is through
Plane vertical line where transformation segment center line is separated into curved interior part and curved outside bending.
Preferably, stent 1 and the structure of rotation mould 2 are completely the same.
As shown in Figure 1, the groover rot diameter of the first arc slot is coiled pipe transformation segment internal diameter, the first arc slot cross-section is a diameter of snakelike
Pipe diameter adds tolerance, the first arc slot and the second arc slot to constitute the diameter of coiled pipe.
When operation, the first arc slot and the second arc slot institute that the steel pipe to be bent at coiled pipe transformation segment are set at point of contact
In the circular hole enclosed, circular hole size is consistent with steel pipe sizes, and driving rotation mould 2 is rotated relative to stent 1, is produced in rotation process
Raw pressure makes steel pipe generate bending, is cooperated by stent 1 and rotation mould 2, coiled pipe transformation segment is made, entire to simmer system
Bending process is determined by the tool structure designed completely, not by man's activity, is converted to which coiled pipe after processing be effectively ensured
The curvature quality of section requires and ellipticity.
It rotates mould 2 to rotate relative to stent 1, first, setting is connected and fixed mould 1 and rotates the link of mould 2, passes through drawing
Turn dynamic model 2 is rotated relative to stent 1, second is that the intermeshing gear teeth are set on the side of stent 1 and rotation mould 2,
Rotation mould 2 is set to be rotated around 1 side of stent, the movement locus of tangent line can be formed snakelike between final stent 1 and rotation mould 2
Pipe transformation segment 901.Certainly, mode two can also be in combination with mode one.
Specifically, this programme further includes the link 5 for being connected and fixed mould 1 and rotating mould 2.
Rotation mould 2 is rotatably set on link 5.
Connection framework as stent 1 and rotation mould 2, it is preferable that link 5 is U-shaped framework, and U-shaped framework includes two
The middle connecting plate of a side plate and connection both side plate one end, stent 1 and rotation mould 2 may be contained between two side plates and pass through
Central shaft is connect with two side plates.
Specifically, stent 1 and rotation mould 2 are fixed on two side plates by the first central shaft 3 and the second central shaft 4 respectively
On；Stent 1 is fastenedly connected with the first central shaft 3, and rotation mould 2 is fastenedly connected or is rotatably connected with the second central shaft 4.It is above-mentioned
In mode, rotation mould 2 rotate around the second central shaft 4, is caused stroke its purpose is to avoid causing to slide during simmering pipe
Hinder tube wall.Certainly, preventing plowing from tube wall can also be such that rotation mould 2 is rotatably set on link 5, that is, rotate mould 2 and second
Central shaft 4 is fastenedly connected, and the second central shaft 4 is rotatably set to by devices such as bearings on link 5.
This programme further includes platform 8, and the first central shaft 3 is fixed on platform 8, platform 8 be arranged be provided with suspension centre hang nose
7.Rotary force is generated through regular lifting of driving a vehicle on rope bolt with steel wire loop, 7 turns of nose is hung by platform during simmering processed
Change suspension centre, it is necessary to assure the center line of rope bolt lineoutofservice signal pull center line and transformation segment in a plane, avoids mold from drawing
Torsion is generated under the action of power generates destruction.
This programme also provides a kind of production method of deep camber coiled pipe, and using above-mentioned making tooling, production method includes：
The built-in sand of step 1 steel pipe to be processed；
901 initiating terminal of coiled pipe transformation segment of steel pipe to be processed is placed in stent 1 and rotates 2 the tangent of mould by step 2
In round hole, driving rotation mould 2 is rotated relative to stent 1, until 901 end of coiled pipe transformation segment stops.
Above-mentioned manufacturing method, is heated without flame, directly carries out stewing system as power using driving, coiled pipe is avoided to occur
The problems such as crackle, ellipse, undergauge, overproof curvature, has the characteristics of at low cost, simple in structure, easily manufactured, remarkable benefit.It can
It is widely used in similar coiled pipe manufacture tool field.
Preferably, oval overproof to avoid steel tube section from occurring, it is first that whole dress of steel pipe is husky, sand is tamped by vibrations.
Simmering and bending tooling is designed on steel platform, stewing system is carried out as power using shop traveller, passes through the company of pulling that drives a vehicle
Connecing the power that frame 5 drives rotation mould 2 to be generated around the rotation of stent 1 makes steel pipe generate bending, mutual by stent 1 and rotation mould 2
Cooperation, to ensure the quality of coiled pipe.Then sand, logical ball suppress progress.This avoid because of flame baking temperature control
It is tired and caused by difficulty the defects of crackle, undergauge, ellipse.
In a specific embodiment, the production method of the deep camber coiled pipe of this programme includes：
1, it is to avoid steel tube section appearance oval overproof, steel pipe is first filled into sand, is tamped husky by vibrations.
2, the design such as stent 1 of figure simmering and bending making tooling and rotation 2 structure of mould is completely the same, fetal membrane arc slot bottom circular diameter
For coiled pipe transformation segment internal diameter, a diameter of diameter of steel tube of arc slot cross-section adds tolerance, stent arc slot to constitute snake with rotation mould arc slot
Shape pipe diameter, stewing process processed is combined with the husky process of dress avoids ovalizing deflection from ensuring that steel tube section tolerance meets the requirements.
3, the first central shaft 3 is fixed on platform 8, and stent 1 is fixedly connected with the first central shaft 3 as pattern, is ensured
The key of transformation segment internal diameter.
4, the second central shaft 4 is fixedly connected with link 5, drives rotation mould 2 to be rotated around stent 1, this step is to make steel
Pipe generates the key of curvature.
5, rotation mould 2 is rotated around the second central shaft 4, avoids causing to slide and cause to scratch tube wall during simmering pipe.
Rotary force is generated through regular lifting of driving a vehicle on rope bolt 6 with steel wire loop, passes through platform during the system of simmering
It hangs nose 7 and converts suspension centre, it is necessary to assure the center line of rope bolt lineoutofservice signal pull center line and transformation segment in a plane, avoids mould
Tool generates torsion under the action of pulling force and generates destruction.
Principle and implementation of the present invention are described for specific case used herein, and above example is said
The bright method and its core concept for being merely used to help understand the present invention.It should be pointed out that for the ordinary skill of the art
, without departing from the principle of the present invention, can be with several improvements and modifications are made to the present invention for personnel, these improvement
It is also fallen within the protection scope of the claims of the present invention with modification.
Claims (10)
1. a kind of making tooling of deep camber coiled pipe, which is characterized in that be side including stent (1) and rotation mould (2)
Cylindrical structure equipped with identical arc slot, the side and the side of the stent (1) of the rotation mould (2) are tangent always, institute
A diameter of coiled pipe transformation segment (901) internal diameter for stating stent (1) arc slot bottom, on the longitudinal section of the tangent, two institutes
Stating circular hole that arc slot is surrounded can just be by the coiled pipe (9).
2. making tooling according to claim 1, which is characterized in that further include the connection stent (1) and described turn
The link (5) of dynamic model (2).
3. making tooling according to claim 2, which is characterized in that be additionally provided on the link (5) for providing
The rotation mould (2) rotates the rope bolt (6) of driving force, and rope, which is set on the rope bolt (6), pulls the rotation mould (2) around institute
State stent (1) rotation.
4. making tooling according to claim 2, which is characterized in that the link (5) is U-shaped framework, the U-shaped frame
Frame includes two side plates and connects the middle connecting plate of described both side plate one end, and the stent (1) and the rotation mould (2) are equal
It is set between described two side plates and is connect with described two side plates by central shaft.
5. making tooling according to claim 4, which is characterized in that the stent (1) and the rotation mould (2) are respectively
It is fixed on described two side plates by the first central shaft (3) and the second central shaft (4)；The stent (1) and described first
Central shaft (3) is fastenedly connected, and the rotation mould (2) is fastenedly connected or is rotatably connected with second central shaft (4).
6. making tooling according to claim 5, which is characterized in that further include platform (8), first central shaft (3)
It is fixed on the platform (8), platform (8) setting is provided with the several of suspension centre and hangs nose (7).
7. making tooling according to claim 2, which is characterized in that the rotation mould (2) is rotatably set to the company
It connects on frame (5).
8. a kind of production method of deep camber coiled pipe, which is characterized in that using the making described in any one of claim 1-7
Tooling, the production method include：
The built-in sand of step 1) steel pipe to be processed；
Coiled pipe transformation segment (901) initiating terminal of steel pipe to be processed is placed in the stent (1) and the rotation mould by step 2)
(2) in the round hole of the tangent, the rotation mould (2) is driven to be rotated relative to the stent (1), until coiled pipe transformation segment
(901) end stops.
9. production method according to claim 8, which is characterized in that further include that step 3) is husky to the steel pipe, lead to ball
With suppress process.
10. production method according to claim 8, which is characterized in that the making tooling further includes the connection fixation
The link (5) of mould (1) and the rotation mould (2) is pulled described in the link (5) drives by driving a vehicle in the step 2)
Mould (2) is rotated to rotate around the stent (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810311314.1A CN108405685A (en) | 2018-04-09 | 2018-04-09 | A kind of production method and tooling of deep camber coiled pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810311314.1A CN108405685A (en) | 2018-04-09 | 2018-04-09 | A kind of production method and tooling of deep camber coiled pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108405685A true CN108405685A (en) | 2018-08-17 |
Family
ID=63134832
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810311314.1A Pending CN108405685A (en) | 2018-04-09 | 2018-04-09 | A kind of production method and tooling of deep camber coiled pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108405685A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110153248A (en) * | 2019-06-21 | 2019-08-23 | 江西洪都航空工业集团有限责任公司 | A kind of tooling and method shaping the incorgruous crimp skin part of Double curve degree |
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| CN104047031A (en) * | 2014-07-03 | 2014-09-17 | 四川华索自动化信息工程有限公司 | Water-cooling coil pipe type integral cast aluminum anode for aluminum electrolysis |
| CN204035270U (en) * | 2014-08-14 | 2014-12-24 | 陕西化建工程有限责任公司 | A kind of stewing device of snakelike companion's hot coil |
| CN104390504A (en) * | 2014-11-18 | 2015-03-04 | 什邡市同佳机械有限公司 | Boiler energy-saving device, and method and tool for manufacturing S-shaped fin heat exchange tube of boiler energy-saving device |
| CN204545055U (en) * | 2015-04-22 | 2015-08-12 | 中国石油天然气第一建设公司 | The manual bending device of a kind of pipe with small pipe diameter steel pipe |
| CN205362472U (en) * | 2016-01-26 | 2016-07-06 | 常州曼淇威制冷设备有限公司 | Oval cross section snaking radiating copper pipe processes frock |
| CN208146701U (en) * | 2018-04-09 | 2018-11-27 | 莱芜钢铁集团有限公司 | A kind of production tooling of deep camber coiled pipe |
-
2018
- 2018-04-09 CN CN201810311314.1A patent/CN108405685A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104047031A (en) * | 2014-07-03 | 2014-09-17 | 四川华索自动化信息工程有限公司 | Water-cooling coil pipe type integral cast aluminum anode for aluminum electrolysis |
| CN204035270U (en) * | 2014-08-14 | 2014-12-24 | 陕西化建工程有限责任公司 | A kind of stewing device of snakelike companion's hot coil |
| CN104390504A (en) * | 2014-11-18 | 2015-03-04 | 什邡市同佳机械有限公司 | Boiler energy-saving device, and method and tool for manufacturing S-shaped fin heat exchange tube of boiler energy-saving device |
| CN204545055U (en) * | 2015-04-22 | 2015-08-12 | 中国石油天然气第一建设公司 | The manual bending device of a kind of pipe with small pipe diameter steel pipe |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110153248A (en) * | 2019-06-21 | 2019-08-23 | 江西洪都航空工业集团有限责任公司 | A kind of tooling and method shaping the incorgruous crimp skin part of Double curve degree |
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Application publication date: 20180817 |