CN103920769A - Bending technology for furnace tube of linear heating furnace - Google Patents
Bending technology for furnace tube of linear heating furnace Download PDFInfo
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- CN103920769A CN103920769A CN201410147465.XA CN201410147465A CN103920769A CN 103920769 A CN103920769 A CN 103920769A CN 201410147465 A CN201410147465 A CN 201410147465A CN 103920769 A CN103920769 A CN 103920769A
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- fixture
- bending
- dipper crowding
- crowding gear
- boiler tube
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- 238000005452 bending Methods 0.000 title claims abstract description 106
- 238000010438 heat treatment Methods 0.000 title claims abstract description 34
- 238000005516 engineering process Methods 0.000 title abstract description 4
- 238000003825 pressing Methods 0.000 claims abstract description 7
- 238000000034 method Methods 0.000 claims description 28
- 238000003754 machining Methods 0.000 claims description 16
- 238000000137 annealing Methods 0.000 claims description 6
- 230000000694 effects Effects 0.000 claims description 4
- 210000000245 forearm Anatomy 0.000 claims description 3
- 230000014759 maintenance of location Effects 0.000 claims description 3
- 238000004513 sizing Methods 0.000 claims description 3
- 238000000465 moulding Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
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- Bending Of Plates, Rods, And Pipes (AREA)
- Heat Treatment Of Articles (AREA)
- Transmission Devices (AREA)
Abstract
Disclosed is a bending technology for a furnace tube of a linear heating furnace. According to the heating technology of the furnace tube of the linear heating furnace, furnace tube bending equipment is adopted and comprises a left frame (13) and a pushing and pressing mechanism (10). The pushing and pressing mechanism (10) is arranged on the right of the left frame (13), a dovetail guide rail (15) is fixedly connected on the rear portion of the right side of the left frame (13) and extends in left and right directions horizontally, the left end of the dovetail guide rail (15) is fixedly connected with the left frame (13) while the right end of the same is slidably connected with a dovetail groove in the rear portion of the pushing and pressing mechanism (10), a through hole allowing the furnace tube to penetrate through is formed in the front portion of the left frame (13), and three bent hydraulic devices (9) are sequentially slidably arranged from left to right between the left frame (13) and the pushing and pressing mechanism (10).
Description
?
Technical field
The application relates to the making of heating furnace tube, is specially a kind of linear heating furnace tube bending process.
Background technology
Heating furnace has a wide range of applications in industry, such as heating steel billet, heat treatment of workpieces etc.In order to increase the heating uniformity of heating furnace, heating furnace tube is often in a bent form.
In the prior art, in order to ensure the requirement to concrete heating furnace shape and to meet the requirement respectively of concrete heating heat, conventionally need to carry out to the shape of boiler tube the bending of concrete shape.For the bending of heating furnace tube, often adopt in the prior art stamping forming mode.This molding mode can efficiently be realized bending machining rapidly, and machining accuracy is high, and cost is lower, has in the prior art extensive use.But, this mode of heating easily produces significantly a large amount of inhomogeneous deformation on the longitudinal direction of heating furnace tube, cause the cross-sectional area of heating furnace tube on the longitudinal direction of boiler tube, to there is larger variation, this makes heating uniformity in heating process be difficult to control, and, easily in the process using, produce inhomogeneous stress and concentrate, thereby cause the stability in use of heating furnace, security greatly to reduce, and shortened the service life of heating furnace.
Also there is in the prior art the bending of use and roll the scheme that workpiece is bent.But, this scheme often adopts curved one by one bending to workpiece, because the longitudinal size of workpiece is larger, in the complete rotation process of workpiece, this processing often needs larger processing space, and, because process is to adopt curved one by one mode, process is longer, and working (machining) efficiency is lower, cause thus processing cost to rise, and be difficult to ensure the form accuracy of processing.
Summary of the invention
A kind of heating furnace tube bending process of the present invention, it is intended to solve in prior art the defects such as machining deformation is inhomogeneous and process is long, form accuracy is low, and a kind of bending process of the heating furnace tube with concrete shape is provided.
The technical solution used in the present invention is as follows:
A kind of bending machining technique of linear pattern furnace tubing, it uses a kind of crooking of the tubes equipment, described crooking of the tubes equipment comprises left frame and dipper crowding gear, dipper crowding gear is right-hand at left frame, the rear portion, right side of described left frame is fixedly connected with dovetail guide, dovetail guide is horizontal-extending on left and right directions, the left end of dovetail guide is fixedly connected with described left frame, dovetail groove in the right-hand member of dovetail guide and the rear portion of dipper crowding gear is slidably connected, and the front portion of described left frame is provided with the through hole passing for boiler tube; On described dovetail guide, between described left frame and dipper crowding gear, slide and be provided with three bending hydraulic means successively from left to right; The front portion, left side of dipper crowding gear is fixedly installed the first fixture, the front portion, right side of left frame is fixedly installed the second fixture, between described left frame and dipper crowding gear, be provided with fromer rail, described fromer rail straight line between the second fixture and the first fixture extends, and in the time that dipper crowding gear slides along described dovetail guide, the first fixture can slide towards the second fixture along fromer rail; On described fromer rail, between the second fixture and the first fixture, be also provided with slidably the 3rd fixture and the 4th fixture, four described fixtures include clip base, rear fixture block and front fixture block, the described rear fixture block of each described fixture and front fixture block all relatively arrange along the fore-and-aft direction in the plane of bending when the described boiler tube generation plain bending, and in clip base, can realize contact gripping and separate the action of unclamping; Wherein, described rear fixture block is all positioned at described fromer rail rear, and is rectangular shape, described front fixture block, is all positioned at described fromer rail front, and is cylindrical shape; The plane of bending of the longitudinal axis of described rectangular shape and cylindrical shape during all perpendicular to described boiler tube generation plain bending.
Wherein, on the right flank of the rear fixture block of described the second fixture, be provided with the right extension limited block extending to the right, on the left surface of the rear fixture block of described the first fixture, be provided with the left extension limited block extending to the left, on the left and right side of the rear fixture block of the 3rd fixture and the 4th fixture, be provided with respectively the left extension limited block extending to the left and the right extension limited block extending to the right.
Each driving hydraulic cylinder that includes in described three bending hydraulic means, described driving hydraulic cylinder vertically arranges with respect to the longitudinal axis of dovetail guide, and can on dovetail guide, slide; The hydraulic stem end of described driving hydraulic cylinder is hinged with bending and rolls, and drives hydraulic cylinder to drive bending is rolled to the bend pipe thrust applying forward along the direction vertical with dovetail guide; Each walking driving mechanism that all also comprises in described three bending hydraulic means, in order to drive respectively corresponding bending hydraulic means to slide into diverse location along dovetail guide.
The right side of described dipper crowding gear is provided with support bar telescoping mechanism, support bar telescoping mechanism is arranged on the front of described dovetail guide, support bar telescoping mechanism has retractility support bar, retractility support bar extend in described boiler tube through leaving the left side of dipper crowding gear and can be used in from the right side of dipper crowding gear, thereby play support boiler tube and prevent that boiler tube from occurring not expect bending effect, and can under the driving of support bar telescoping mechanism, on left and right directions, move back and forth.
Described crooking of the tubes technique comprises the steps:
A., linear pattern boiler tube is provided;
B. described linear pattern boiler tube penetrated to a through hole on described left frame and advance to the right, stretching out in described left frame until described linear pattern boiler tube will carry out the length part of bending machining;
C. described the second fixture clamps the left end of described linear pattern boiler tube;
D. dipper crowding gear motion, to make the right-hand member of the first clamp linear pattern boiler tube;
E. the 3rd fixture and the 4th fixture clamp linear pattern boiler tube between the second fixture and the first fixture, and make the second fixture, the 3rd fixture, the 4th fixture and the first fixture that the described forearm of linear pattern boiler tube is separated into three length sections equal in length;
F. each in described three bending hydraulic means rolls its bending to contact respectively the mid point of corresponding each length section in described three length sections;
G. the support bar telescoping mechanism of dipper crowding gear stretches into retractility support bar in the pipe of linear pattern boiler tube, and it is not supported to leave first length section from left to right in described three length sections, from left to right second and the 3rd length section supported;
H. the bending of the bending hydraulic means in left side is got away and is begun outwards to push up described first length section of pressure, thereby make it that linear bending occur, dipper crowding gear is synchronously followed pushing along with the carrying out of bending, meanwhile, and the 3rd fixture, the also synchronously accompany movement of the 4th fixture; In the process of pressing on top, the bending hydraulic means in left side to left movement, keeps corresponding to the position of described first length section mid point thereby its bending is rolled under the driving of its walking driving mechanism; While contact to the right extension limited block of the first fixture and the left extension limited block of the 3rd fixture, the bending of the bending hydraulic means in described left side is rolled and is stopped top and press, and dipper crowding gear stops continuing pushing forward; Dipper crowding gear stops continuing after pushing forward, and dipper crowding gear keeps current pushing force horizontal stationary motionless minute, so that the part of bending forming is carried out to pressurize sizing;
I. the support bar telescoping mechanism of dipper crowding gear is retractility support bar retraction, thereby makes to stay first length section from left to right in described three length sections and second length section is all not supported from left to right, and the 3rd length section is supported from left to right;
J. the bending hydraulic means in the middle of start top press described in second length section from left to right, until the right extension limited block of the 3rd fixture and the left extension limited block of the 4th fixture contact;
K. dipper crowding gear bounces back described support bar completely, so that three length sections are all not supported;
L. the bending hydraulic means on right side start top press described in the 3rd length section from left to right, until the right extension limited block of the 4th fixture and the left extension limited block of the first fixture contact;
M. each fixture unclamps, and takes the complete heating furnace tube of bending machining away;
N. heating furnace tube complete bending machining is put into destressing heat-treatment furnace and carry out stress relief annealing, for example, the process conditions of annealing can be: holding temperature degree Celsius, temperature retention time hour.
In the present invention, on each fixture, adopt extension limited block, thereby made, after limited block contact, can carry out a locking to the boiler tube after moulding, under the effect of follow-up elaboration power, can not impact the curved shape after precise forming, be cuboid while be columniform fixture and adopted, when having made to ensure enough clamping forces, can form level and smooth flexural deformation to the boiler tube being shaped again, whole process, on one side in longitudinal direction feeding, utilize bending to roll on one side and do to carry out bending, therefore, it has avoided on the longitudinal direction of boiler tube, producing at processed bending position in prior art the problem of larger linear deformation, and, in process, it adopts unique form processing, feeding on one side, bending is rolled in vertical longitudinal direction and is moved and move in parallel longitudinal direction direction, thereby the relative position relation with institute's crooked position is rolled in maintenance bending, and boiler tube is longitudinally sent under the integrated moving of other clamping devices, therefore, ensure boiler tube entirety to keep longitudinal direction and by curved bending one by one, whole BENDING PROCESS is continuous, without repeating, boiler tube is carried out to clamping and dismounting, make whole process processing space little, process is short and ensured the form accuracy of processing.And multiple fixtures can slide in process, ensure all the time boiler tube to be had the locking of clamping position in process.
Brief description of the drawings
Fig. 1 is the schematic top plan view of bending apparatus of the present invention.
Fig. 2 is the schematic top plan view of bending apparatus after the crooking of the tubes is completed in Fig. 1 of the present invention.
Fig. 3 is the schematic top plan view of the boiler tube shape after bending completes.
Detailed description of the invention
Below in conjunction with accompanying drawing 1-3, the present invention is described in detail.
A kind of bending machining technique of linear pattern furnace tubing, it uses a kind of crooking of the tubes equipment, described crooking of the tubes equipment comprises left frame 13 and dipper crowding gear 10, dipper crowding gear 10 is right-hand at left frame 13, the rear portion, right side of described left frame 13 is fixedly connected with dovetail guide 15, dovetail guide 15 horizontal-extending on left and right directions, the left end of dovetail guide 15 is fixedly connected with described left frame 13, dovetail groove in the rear portion of the right-hand member of dovetail guide 15 and dipper crowding gear 10 is slidably connected, and the front portion of described left frame 13 is provided with the through hole passing for boiler tube; On described dovetail guide 15, between described left frame 13 and dipper crowding gear 10, slide and be provided with three bending hydraulic means 9 successively from left to right; The front portion, left side of dipper crowding gear 10 is fixedly installed the first fixture 1, the front portion, right side of left frame 13 is fixedly installed the second fixture 4, between described left frame 13 and dipper crowding gear 10, be provided with fromer rail, described fromer rail straight line between the second fixture 4 and the first fixture 1 extends, and in the time that dipper crowding gear 10 slides along described dovetail guide 15, the first fixture 1 can slide towards the second fixture 4 along fromer rail; On described fromer rail, between the second fixture 4 and the first fixture 1, be also provided with slidably the 3rd fixture 3 and the 4th fixture 2, four described fixtures 1,2,3,4 include clip base, rear fixture block 41 and front fixture block 42, the described rear fixture block 41 of each described fixture and front fixture block 42 all relatively arrange along the fore-and-aft direction in the plane of bending when the described boiler tube generation plain bending, and in clip base, can realize contact gripping and separate the action of unclamping; Wherein, described rear fixture block 41 is all positioned at described fromer rail rear, and is rectangular shape, and described front fixture block 82,42 is all positioned at described fromer rail front, and is cylindrical shape; The plane of bending of the longitudinal axis of described rectangular shape and cylindrical shape during all perpendicular to described boiler tube generation plain bending.
Wherein, on the right flank of the rear fixture block of described the second fixture 4, be provided with the right extension limited block 43 extending to the right, on the left surface of the rear fixture block of described the first fixture 1, be provided with to the left and on the left and right side of rear fixture block of left extension limited block 14, the three fixtures 3 that extend and the 4th fixture 2, be provided with respectively the left extension limited block that extends to the left and the right extension limited block of extension to the right.
Each driving hydraulic cylinder that includes in described three bending hydraulic means 9, described driving hydraulic cylinder vertically arranges with respect to the longitudinal axis of dovetail guide 15, and can on dovetail guide 15, slide; The hydraulic stem end of described driving hydraulic cylinder is hinged with bending and rolls 91, and drives hydraulic cylinder to drive bending is rolled to the 91 bend pipe thrusts that apply forward along the direction vertical with dovetail guide 15; Each walking driving mechanism that all also comprises in described three bending hydraulic means 9, in order to drive respectively corresponding bending hydraulic means 9 to slide into diverse location along dovetail guide 15.
The right side of described dipper crowding gear 10 is provided with support bar telescoping mechanism 12, support bar telescoping mechanism 12 is arranged on the front of described dovetail guide 15, support bar telescoping mechanism 12 has retractility support bar 120, retractility support bar 120 extend in described boiler tube through leaving the left side of dipper crowding gear 10 and can be used in from the right side of dipper crowding gear 10, thereby play support boiler tube and prevent that boiler tube from occurring not expect bending effect, and can under the driving of support bar telescoping mechanism 12, on left and right directions, move back and forth.
Described crooking of the tubes technique comprises the steps:
A., linear pattern boiler tube 19 is provided;
B. described linear pattern boiler tube penetrated to a through hole on described left frame 13 and advance to the right, stretching out in described left frame 13 until described linear pattern boiler tube will carry out the length part of bending machining;
C. described the second fixture 4 clamps the left end of described linear pattern boiler tube;
D. dipper crowding gear 10 moves, to make the first fixture 1 clamp the right-hand member of linear pattern boiler tube;
E. the 3rd fixture 3 and the 4th fixture 2 clamp linear pattern boiler tube between the second fixture 4 and the first fixture 1, and make the second fixture 4, the 3rd fixture 3, the 4th fixture 2 and the first fixture 1 that the described forearm of linear pattern boiler tube is separated into three length sections equal in length;
F. each in described three bending hydraulic means 9 makes its bending roll 91 mid points that contact respectively corresponding each length section in described three length sections;
G. the support bar telescoping mechanism 12 of dipper crowding gear 10 stretches into retractility support bar 120 in the pipe of linear pattern boiler tube, and it is not supported to leave first length section from left to right in described three length sections, from left to right second and the 3rd length section supported;
H. the bending of the bending hydraulic means 9 in left side is got away and is begun outwards to push up described first length section of pressure, thereby make it that linear bending occur, dipper crowding gear 10 carrying out along with bending and synchronously follow pushing, meanwhile, the 3rd fixture 3, the also synchronously accompany movement of the 4th fixture 2; In the process of pressing on top, the bending hydraulic means 9 in left side to left movement, keeps corresponding to the position of described first length section mid point thereby its bending is rolled under the driving of its walking driving mechanism; While contact to the right extension limited block 43 of the first fixture 4 and the left extension limited block of the 3rd fixture 3, the bending of the bending hydraulic means 9 in described left side is rolled and is stopped top and press, and dipper crowding gear 10 stops continuing pushing forward; Dipper crowding gear 10 stops continuing after pushing forward, and dipper crowding gear 10 keeps current pushing force horizontal stationary motionless 10 minutes, so that the part of bending forming is carried out to pressurize sizing;
I. the support bar telescoping mechanism 12 of dipper crowding gear 10 bounces back retractility support bar 120, thereby makes to stay first length section from left to right in described three length sections and second length section is all not supported from left to right, and the 3rd length section is supported from left to right;
J. the bending hydraulic means 9 in the middle of start top press described in second length section from left to right, until the right extension limited block of the 3rd fixture 3 and the left extension limited block of the 4th fixture 2 contact;
K. dipper crowding gear 10 bounces back described support bar 120 completely, so that three length sections are all not supported;
L. the bending hydraulic means 9 on right side start top press described in the 3rd length section from left to right, until the right extension limited block of the 4th fixture 2 and the left extension limited block of the first fixture 1 contact;
M. each fixture unclamps, and takes the complete heating furnace tube of bending machining away;
N. heating furnace tube complete bending machining is put into destressing heat-treatment furnace and carry out stress relief annealing, for example, the process conditions of annealing can be: 300 degrees Celsius of holding temperatures, temperature retention time 3 hours.
Claims (1)
1. the bending machining technique of a linear pattern furnace tubing, it uses a kind of crooking of the tubes equipment, described crooking of the tubes equipment comprises left frame (13) and dipper crowding gear (10), dipper crowding gear (10) is right-hand at left frame (13), the rear portion, right side of described left frame (13) is fixedly connected with dovetail guide (15), dovetail guide (15) horizontal-extending on left and right directions, the left end of dovetail guide (15) is fixedly connected with described left frame (13), dovetail groove in the rear portion of the right-hand member of dovetail guide (15) and dipper crowding gear (10) is slidably connected, the front portion of described left frame (13) is provided with the through hole passing for boiler tube, described dovetail guide (15) is upper to slide and is provided with three bending hydraulic means (9) successively from left to right between described left frame (13) and dipper crowding gear (10), the front portion, left side of dipper crowding gear (10) is fixedly installed the first fixture (1), the front portion, right side of left frame (13) is fixedly installed the second fixture (4), between described left frame (13) and dipper crowding gear (10), be provided with fromer rail, described fromer rail straight line between the second fixture (4) and the first fixture (1) extends, and in the time that dipper crowding gear (10) slides along described dovetail guide (15), the first fixture (1) can slide towards the second fixture (4) along fromer rail, on described fromer rail, between the second fixture (4) and the first fixture (1), be also provided with slidably the 3rd fixture (3) and the 4th fixture (2), four described fixtures (1,2,3,4) include clip base, rear fixture block (41) and front fixture block (42), the described rear fixture block (41) of each described fixture and front fixture block (42) all relatively arrange along the fore-and-aft direction in the plane of bending when the described boiler tube generation plain bending, and in clip base, can realize contact gripping and separate the action of unclamping, wherein, described rear fixture block (41) is all positioned at described fromer rail rear, and is rectangular shape, and described front fixture block (82,42) is all positioned at described fromer rail front, and is cylindrical shape, the plane of bending of the longitudinal axis of described rectangular shape and cylindrical shape during all perpendicular to described boiler tube generation plain bending,
Wherein, on the right flank of the rear fixture block of described the second fixture (4), be provided with the right extension limited block (43) extending to the right, on the left surface of the rear fixture block of described the first fixture (1), be provided with the left extension limited block (14) extending to the left, on the left and right side of the rear fixture block of the 3rd fixture (3) and the 4th fixture (2), be provided with respectively the left extension limited block extending to the left and the right extension limited block extending to the right;
Each driving hydraulic cylinder that includes in described three bending hydraulic means (9), described driving hydraulic cylinder vertically arranges with respect to the longitudinal axis of dovetail guide (15), and can be in the upper slip of dovetail guide (15); The hydraulic stem end of described driving hydraulic cylinder is hinged with bending and rolls (91), and drives hydraulic cylinder to drive and roll (91) to bending and apply bend pipe thrust forward along the direction vertical with dovetail guide (15); Each walking driving mechanism that all also comprises in described three bending hydraulic means (9), in order to drive respectively corresponding bending hydraulic means (9) to slide into diverse location along dovetail guide (15);
The right side of described dipper crowding gear (10) is provided with support bar telescoping mechanism (12), support bar telescoping mechanism (12) is arranged on the front of described dovetail guide (15), support bar telescoping mechanism (12) has retractility support bar (120), retractility support bar (120) extend in described boiler tube through leaving the left side of dipper crowding gear (10) and can be used in from the right side of dipper crowding gear (10), thereby play support boiler tube and prevent that boiler tube from bending effect occurring not expect, and can under the driving of support bar telescoping mechanism (12), on left and right directions, move back and forth,
Described crooking of the tubes technique comprises the steps:
A., linear pattern boiler tube (19) is provided;
B. described linear pattern boiler tube penetrated to a through hole on described left frame (13) and advance to the right, stretching out in described left frame (13) until described linear pattern boiler tube will carry out the length part of bending machining;
C. described the second fixture (4) clamps the left end of described linear pattern boiler tube;
D. dipper crowding gear (10) motion, to make the first fixture (1) clamp the right-hand member of linear pattern boiler tube;
E. the 3rd fixture (3) and the 4th fixture (2) clamp linear pattern boiler tube between the second fixture (4) and the first fixture (1), and make the second fixture (4), the 3rd fixture (3), the 4th fixture (2) and the first fixture (1) that the described forearm of linear pattern boiler tube is separated into three length sections equal in length;
F. each in described three bending hydraulic means (9) makes its bending roll (91) to contact respectively the mid point of corresponding each length section in described three length sections;
G. the support bar telescoping mechanism (12) of dipper crowding gear (10) stretches into retractility support bar (120) in the pipe of linear pattern boiler tube, and it is not supported to leave first length section from left to right in described three length sections, from left to right second and the 3rd length section supported;
H. the bending of the bending hydraulic means (9) in left side is got away and is begun outwards to push up described first length section of pressure, thereby make it that linear bending occur, dipper crowding gear (10) is synchronously followed pushing along with the carrying out of bending, meanwhile, the 3rd fixture (3), the 4th also synchronously accompany movement of fixture (2); In the process of pressing on top, the bending hydraulic means (9) in left side to left movement, keeps corresponding to the position of described first length section mid point thereby its bending is rolled under the driving of its walking driving mechanism; While contact with the left extension limited block of the 3rd fixture (3) to the right extension limited block (43) of the first fixture (4), the bending of the bending hydraulic means (9) in described left side is rolled and is stopped top pressure, and dipper crowding gear (10) stops continuing pushing forward; Dipper crowding gear (10) stops continuing after pushing forward, and dipper crowding gear (10) keeps current pushing force horizontal stationary motionless 10 minutes, so that the part of bending forming is carried out to pressurize sizing;
I. the support bar telescoping mechanism (12) of dipper crowding gear (10) bounces back retractility support bar (120), thereby make to stay first length section from left to right in described three length sections and second length section is all not supported from left to right, the 3rd length section is supported from left to right;
J. the bending hydraulic means (9) in the middle of start top press described in second length section from left to right, until the right extension limited block of the 3rd fixture (3) contacts with the left extension limited block of the 4th fixture (2);
K. dipper crowding gear (10) bounces back described support bar (120) completely, so that three length sections are all not supported;
L. the bending hydraulic means (9) on right side start top press described in the 3rd length section from left to right, until the right extension limited block of the 4th fixture (2) and the left extension limited block of the first fixture (1) contact;
M. each fixture unclamps, and takes the complete heating furnace tube of bending machining away;
N. heating furnace tube complete bending machining is put into destressing heat-treatment furnace and carry out stress relief annealing, for example, the process conditions of annealing can be: 300 degrees Celsius of holding temperatures, temperature retention time 3 hours.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410147465.XA CN103920769B (en) | 2014-04-14 | 2014-04-14 | A kind of bending process of linear pattern heating furnace tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410147465.XA CN103920769B (en) | 2014-04-14 | 2014-04-14 | A kind of bending process of linear pattern heating furnace tube |
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| Publication Number | Publication Date |
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| CN103920769A true CN103920769A (en) | 2014-07-16 |
| CN103920769B CN103920769B (en) | 2016-01-20 |
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| Application Number | Title | Priority Date | Filing Date |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1570074A (en) * | 1967-05-02 | 1969-06-06 | ||
| US5259224A (en) * | 1991-09-05 | 1993-11-09 | Rigobert Schwarze | Method and apparatus for controlling a pipe bending machine |
| CN1122266A (en) * | 1993-11-22 | 1996-05-15 | 伯尔奥克工具及量规公司 | Slaved tube length control for hairpin bender |
| CN201751032U (en) * | 2010-06-23 | 2011-02-23 | 浙江嘉兴亚达不锈钢制造有限公司 | Pipe bending machine |
| CN102825118A (en) * | 2011-06-19 | 2012-12-19 | 江苏亚光金属制品有限公司 | Machine for bending pipe for evaporator into 9 shape |
| CN103118816A (en) * | 2011-01-22 | 2013-05-22 | 三樱工业株式会社 | Pipe bending apparatus |
-
2014
- 2014-04-14 CN CN201410147465.XA patent/CN103920769B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1570074A (en) * | 1967-05-02 | 1969-06-06 | ||
| US5259224A (en) * | 1991-09-05 | 1993-11-09 | Rigobert Schwarze | Method and apparatus for controlling a pipe bending machine |
| CN1122266A (en) * | 1993-11-22 | 1996-05-15 | 伯尔奥克工具及量规公司 | Slaved tube length control for hairpin bender |
| CN201751032U (en) * | 2010-06-23 | 2011-02-23 | 浙江嘉兴亚达不锈钢制造有限公司 | Pipe bending machine |
| CN103118816A (en) * | 2011-01-22 | 2013-05-22 | 三樱工业株式会社 | Pipe bending apparatus |
| CN102825118A (en) * | 2011-06-19 | 2012-12-19 | 江苏亚光金属制品有限公司 | Machine for bending pipe for evaporator into 9 shape |
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| Publication number | Publication date |
|---|---|
| CN103920769B (en) | 2016-01-20 |
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