CN103920767B - A kind of bending process of linear type heating furnace tube - Google Patents
A kind of bending process of linear type heating furnace tube Download PDFInfo
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- CN103920767B CN103920767B CN201410147411.3A CN201410147411A CN103920767B CN 103920767 B CN103920767 B CN 103920767B CN 201410147411 A CN201410147411 A CN 201410147411A CN 103920767 B CN103920767 B CN 103920767B
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- 238000005452 bending Methods 0.000 title claims abstract description 109
- 238000000034 method Methods 0.000 title claims abstract description 14
- 238000010438 heat treatment Methods 0.000 title claims description 31
- 238000003754 machining Methods 0.000 claims abstract description 8
- 239000012530 fluid Substances 0.000 claims description 30
- 238000004064 recycling Methods 0.000 claims description 9
- 238000004513 sizing Methods 0.000 claims description 6
- 230000033001 locomotion Effects 0.000 claims description 5
- 230000000694 effects Effects 0.000 claims description 4
- 210000000245 forearm Anatomy 0.000 claims description 3
- 230000009017 pursuit movement Effects 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
- 238000005516 engineering process Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
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Abstract
A kind of bending machining technique of linear type furnace tubing, it uses a kind of linear type furnace tubing bending apparatus, described linear type furnace tubing bending apparatus includes left frame (13) and dipper crowding gear (10), dipper crowding gear (10) is in left frame (13) right, the rear portion, right side of described left frame (13) is fixedly connected with dovetail guide (15), dovetail guide (15) is the most horizontal-extending, the left end of dovetail guide (15) is fixing with described left frame (13) to be connected, the right-hand member of dovetail guide (15) is slidably connected with the dovetail groove in the rear portion of dipper crowding gear (10), the front portion of described left frame (13) is provided with the through hole passed for boiler tube；Slide the most successively between described left frame (13) and dipper crowding gear (10) on described dovetail guide (15) and be provided with three bending hydraulic means (9).
Description
Technical field
The application relates to the making of heating furnace tube, a kind of linear heating furnace tube bending process.
Background technology
Heating furnace has a wide range of applications in the 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 meet the requirement respectively of concrete heating heat, it usually needs the shape of boiler tube to be carried out the bending of concrete shape.For the bending of heating furnace tube, the most often use stamping forming mode.This molding mode can efficiently and rapidly realize bending machining, and machining accuracy is high, and cost is relatively low, and tool is widely used in the prior art.But, this mode of heating easily produces notable substantial amounts of inhomogeneous deformation on the longitudinal direction of heating furnace tube, the cross-sectional area causing heating furnace tube has large variation on the longitudinal direction of boiler tube, this makes heating uniformity in heating process be difficult to control to, and, during using, easily produce uneven stress concentrate, thus cause the stability in use of heating furnace, safety to be substantially reduced, and shorten the service life of heating furnace.
The most also there is the scheme using bending rolling to bend workpiece.But, this scheme often uses the most curved bending to workpiece, owing to the longitudinal size of workpiece is relatively big, during the complete rotation of workpiece, this processing generally requires bigger processing space, and, owing to the course of processing is to use the most curved mode, the course of processing is longer, and working (machining) efficiency is relatively low, thus cause processing cost to rise, and be difficult to ensure that the form accuracy of processing.
Summary of the invention
One heating furnace tube bending process of the present invention, the defects such as it aims to solve the problem that in prior art that machining deformation is uneven and course of processing length, form accuracy be low, and the bending process of a kind of heating furnace tube with concrete shape is provided.
The technical solution used in the present invention is as follows:
Carry out adding hot fluid heats the linear type furnace tubing bending process of pressurize sizing, it uses a kind of linear type furnace tubing bending apparatus, described linear type furnace tubing bending apparatus includes left frame and dipper crowding gear, dipper crowding gear is in left frame right, the rear portion, right side of described left frame is fixedly connected with dovetail guide, dovetail guide is the most horizontal-extending, the left end of dovetail guide is fixing with described left frame to be connected, the right-hand member of dovetail guide is slidably connected with the dovetail groove in the rear portion of dipper crowding gear, the front portion of described left frame is provided with the through hole passed for boiler tube；Slide the most successively between described left frame and dipper crowding gear on described dovetail guide and be provided with three bending hydraulic means；The front portion, left side of dipper crowding gear is fixedly installed the first fixture, the right front of left frame is fixedly installed the second fixture, it is provided with fromer rail between described left frame and dipper crowding gear, described fromer rail is straight-line extension between the second fixture and the first fixture, and when dipper crowding gear slides along described dovetail guide, the first fixture can slide along fromer rail towards the second fixture；Between the second fixture and the first fixture, the 3rd fixture and the 4th fixture it is provided with the most slidably on described fromer rail, four described fixtures all include clip base, rear fixture block and front fixture block, the described rear fixture block of each described fixture and front fixture block are oppositely disposed each along direction before and after in the plane of bending when described linear type furnace tubing generation plain bending, and are capable of contact clamping in clip base and separate the action unclamped；Wherein, described rear fixture block is respectively positioned on described fromer rail rear, and is rectangular shape, described front fixture block, is respectively positioned on described fromer rail front, and is cylindrical shape；The longitudinal axis of described rectangular shape and cylindrical shape is each perpendicular to plane of bending during described linear type furnace tubing generation plain bending.
Wherein, the right extension limited block extended to the right it is provided with on the right flank of the rear fixture block of described second fixture, it is provided with the left extension limited block extended to the left on the left surface of the rear fixture block of described first fixture, the left and right side of the rear fixture block of the 3rd fixture and the 4th fixture is provided with the left extension limited block extended to the left and the right extension limited block extended to the right respectively.
Each including in described three bending hydraulic means drives hydraulic cylinder, and described driving hydraulic cylinder is arranged relative to the longitudinal axis orthogonal of dovetail guide, and can slide on dovetail guide；The hydraulic stem end of described driving hydraulic cylinder is hinged with bending roll, and drives hydraulic cylinder along the direction driving vertical with dovetail guide, bending roll can be applied bend pipe thrust forward；Described three bending hydraulic means the most also include hoofing part mechanism, in order to drive corresponding bending hydraulic means to slide into diverse location along dovetail guide respectively.
The right side of described dipper crowding gear is provided with a stay tube telescoping mechanism, prop up stay tube telescoping mechanism and be arranged on the front of described dovetail guide, stay tube telescoping mechanism has retractility and props up stay tube, retractility props up stay tube from the right side of dipper crowding gear through leaving the left side of dipper crowding gear and can be used in extending in described linear type furnace tubing, thus play the effect that boiler tube prevents boiler tube generation from undesirably bending that supports, and can move back and forth in the lateral direction under the driving of a stay tube telescoping mechanism；Described retractility props up stay tube can add hot fluid in the right-hand member of boiler tube stretches into boiler tube and to supply in boiler tube, and described linear type furnace tubing bending apparatus also includes heating fluid recycling apparatus, heating fluid recycling apparatus can from the left end of described linear type furnace tubing reclaim described in add hot fluid, described in add hot fluid and boiler tube can be heated up thus beneficially flexural deformation.
Described linear type furnace tubing bending process comprises the steps:
A., linear type furnace tubing is provided；
B. described linear type furnace tubing is penetrated a through hole on described left frame and advances to the right, until the length thereof of described linear type furnace tubing processing to be curved stretches out in described left frame；
The left end of described linear type furnace tubing is clamped by the most described second fixture；
D. dipper crowding gear motion, so that the right-hand member of the first clamp linear type furnace tubing；
E. linear type furnace tubing is clamped between the second fixture and the first fixture by the 3rd fixture and the 4th fixture, and makes the second fixture, the 3rd fixture, the 4th fixture and the first fixture that the forearm of linear type furnace tubing be separated into three length sections that length is equal；
Each in the most described three bending hydraulic means makes its bending roll contact the midpoint of corresponding each length section in described three length sections respectively；
Retractility is propped up in the pipe that stay tube stretches into linear type furnace tubing by the stay tube telescoping mechanism G. arranged on the right side of dipper crowding gear, and stays first length section from left to right in described three length sections not supported, from left to right second and the 3rd length section supported；Described retractility is propped up stay tube and is started in described linear type furnace tubing supply and add hot fluid, and heats fluid recycling apparatus and start to reclaim in described linear type furnace tubing to add hot fluid, described in add hot fluid described linear type furnace tubing heated up；
H. the bending roll of the bending hydraulic means in left side starts outwards to push up first length section of pressure, thus brings it about linear bending, and dipper crowding gear synchronously follows pushing along with the carrying out of bending, meanwhile, and the 3rd fixture, the 4th fixture the most synchronously pursuit movement；During the pressure of top, the bending hydraulic means in left side under the driving of its hoofing part mechanism to left movement so that its bending roll keeps the position corresponding to described first length section midpoint；During to the left extension limited block contact of the right extension limited block of the first fixture and the 3rd fixture, the bending roll of the bending hydraulic means in described left side stops top pressure, and dipper crowding gear stops continuing to push forward；After dipper crowding gear stops continuing to push forward, dipper crowding gear keeps current pushing force horizontal stationary motionless minute, so that the part already bent into shape is carried out pressurize sizing；
I. retractility is propped up stay tube retraction by a stay tube telescoping mechanism for dipper crowding gear so that stay first length section from left to right in described three length sections and from left to right second length section do not supported, the 3rd length section is supported from left to right；
J. the bending hydraulic means in the middle of starts second length section from left to right described in the pressure of top, until the left extension limited block of the right extension limited block of the 3rd fixture and the 4th fixture contacts；
K. dipper crowding gear makes described retractility prop up stay tube to be fully retracted, so that three length sections are not supported；
L. the bending hydraulic means on right side starts the 3rd length section from left to right described in the pressure of top, until the left extension limited block of the right extension limited block of the 4th fixture and the first fixture contacts；
M. each fixture unclamps, and takes the heating furnace tube that bending machining is complete away.
Owing to, in the present invention, each fixture have employed extension limited block, so that after limited block contact, it is possible to the boiler tube after molding is carried out a locking, under the effect of follow-up elaboration power, the curved shape after precise forming will not be impacted；And have employed is cuboid while being cylindrical fixture so that while ensure that enough clamping forces, the boiler tube shaped can be formed smooth flexural deformation again；Whole process, while in longitudinal direction feeding, while utilizing bending to roll work carry out bending, therefore, which obviate the problem producing bigger linear deformation at the position being processed bending on the longitudinal direction of boiler tube in prior art, and, in the course of processing, it uses the form processing of uniqueness, feeding on one side, bending roll carries out action in vertical longitudinal direction and moves on parallel longitudinal direction direction, thus keep the relative position relation of bending roll and institute's crooked position, and boiler tube is longitudinally sent under the moving integrally of other clamping devices, therefore, ensure that boiler tube entirety keeps longitudinal direction to be bent into row bending one by one, whole BENDING PROCESS is continuous, without repeating boiler tube is carried out clamping and dismounting, make whole course of processing processing space little, the course of processing is short and ensure that the form accuracy of processing.And, multiple fixtures can slide in the course of processing, it is ensured that have the locking of clamping position in the course of processing all the time to boiler tube.
Accompanying drawing explanation
Fig. 1 is the schematic top plan view of the bending apparatus of the present invention.
Fig. 2 be the present invention Fig. 1 in bending apparatus schematic top plan view after linear type furnace tubing has been bent.
Fig. 3 is the schematic top plan view of the linear type furnace tubing shape after having bent.
Detailed description of the invention
The present invention is described in detail for 1-3 below in conjunction with the accompanying drawings.
Carry out adding hot fluid heats the linear type furnace tubing bending process of pressurize sizing, it uses a kind of linear type furnace tubing bending apparatus, described linear type furnace tubing bending apparatus includes left frame 13 and dipper crowding gear 10, dipper crowding gear 10 is in left frame 13 right, the rear portion, right side of described left frame 13 is fixedly connected with dovetail guide 15, dovetail guide 15 is the most horizontal-extending, the left end of dovetail guide 15 is fixing with described left frame 13 to be connected, the right-hand member of dovetail guide 15 is slidably connected with the dovetail groove in the rear portion of dipper crowding gear 10, the front portion of described left frame 13 is provided with the through hole passed for boiler tube；Slide the most successively between described left frame 13 and dipper crowding gear 10 on described dovetail guide 15 and be provided with three bending hydraulic means 9；The front portion, left side of dipper crowding gear 10 is fixedly installed the first fixture 1, the right front of left frame 13 is fixedly installed the second fixture 4, it is provided with fromer rail between described left frame 13 and dipper crowding gear 10, described fromer rail is straight-line extension between the second fixture 4 and the first fixture 1, and when dipper crowding gear 10 slides along described dovetail guide 15, the first fixture 1 can slide along fromer rail towards the second fixture 4；Between the second fixture 4 and the first fixture 1, the 3rd fixture 3 and the 4th fixture 2 it is provided with the most slidably on described fromer rail, four described fixtures 1,2,3,4 all 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 are oppositely disposed each along direction before and after in the plane of bending when described linear type furnace tubing generation plain bending, and are capable of contact clamping in clip base and separate the action unclamped；Wherein, described rear fixture block 41 is respectively positioned on described fromer rail rear, and is rectangular shape, and described front fixture block 82,42 is respectively positioned on described fromer rail front, and is cylindrical shape；The longitudinal axis of described rectangular shape and cylindrical shape is each perpendicular to plane of bending during described linear type furnace tubing generation plain bending.
Wherein, the right extension limited block 43 extended to the right it is provided with on the right flank of the rear fixture block of described second fixture 4, it is provided with the left extension limited block 14 extended to the left on the left surface of the rear fixture block of described first fixture 1, the left and right side of the rear fixture block of the 3rd fixture 3 and the 4th fixture 2 is provided with the left extension limited block extended to the left and the right extension limited block extended to the right respectively.
Each including in described three bending hydraulic means 9 drives hydraulic cylinder, and described driving hydraulic cylinder is arranged relative to the longitudinal axis orthogonal of dovetail guide 15, and can slide on dovetail guide 15；The hydraulic stem end of described driving hydraulic cylinder is hinged with bending roll 91, and drives hydraulic cylinder can drive the bend pipe thrust applied bending roll 91 forward along the direction vertical with dovetail guide 15；Described three bending hydraulic means 9 the most also include hoofing part mechanism, in order to drive corresponding bending hydraulic means 9 to slide into diverse location along dovetail guide 15 respectively.
The right side of described dipper crowding gear 10 is provided with a stay tube telescoping mechanism 12, prop up stay tube telescoping mechanism 12 and be arranged on the front of described dovetail guide 15, stay tube telescoping mechanism 12 has retractility and props up stay tube 120, retractility props up stay tube 120 from the right side of dipper crowding gear 10 through leaving the left side of dipper crowding gear 10 and can be used in extending in described linear type furnace tubing, thus play the effect that boiler tube prevents boiler tube generation from undesirably bending that supports, and can move back and forth in the lateral direction under the driving of a stay tube telescoping mechanism 12；Described retractility props up stay tube can add hot fluid in the right-hand member of boiler tube stretches into boiler tube and to supply in boiler tube, and described linear type furnace tubing bending apparatus also includes heating fluid recycling apparatus 121, heating fluid recycling apparatus 121 can from the left end of described linear type furnace tubing reclaim described in add hot fluid, described in add hot fluid and boiler tube can be heated up thus beneficially flexural deformation.
Described linear type furnace tubing bending process comprises the steps:
A., linear type furnace tubing is provided；
B. described linear type furnace tubing is penetrated a through hole on described left frame 13 and advances to the right, until the length thereof of described linear type furnace tubing processing to be curved stretches out in described left frame 13；
The left end of described linear type furnace tubing is clamped by the most described second fixture 4；
D. dipper crowding gear 10 moves, so that the first fixture 1 clamps the right-hand member of linear type furnace tubing；
E. linear type furnace tubing is clamped between the second fixture 4 and the first fixture 1 by the 3rd fixture 3 and the 4th fixture 2, and makes the second fixture the 4, the 3rd fixture the 3, the 4th fixture 2 and the first fixture 1 that the forearm of linear type furnace tubing be separated into three length sections that length is equal；
Each in the most described three bending hydraulic means 9 makes its bending roll 91 contact the midpoint of corresponding each length section in described three length sections respectively；
Retractility is propped up in the pipe that stay tube 120 stretches into linear type furnace tubing by the stay tube telescoping mechanism 12 G. arranged on the right side of dipper crowding gear 10, and stays first length section from left to right in described three length sections not supported, from left to right second and the 3rd length section supported；Described retractility is propped up stay tube and is started in described linear type furnace tubing supply and add hot fluid, and heats fluid recycling apparatus 121 and start to reclaim in described linear type furnace tubing to add hot fluid, described in add hot fluid described linear type furnace tubing heated up；
H. the bending roll of the bending hydraulic means 9 in left side starts outwards to push up first length section of pressure, thus bring it about linear bending, dipper crowding gear 10 synchronously follows pushing along with the carrying out of bending, meanwhile, and the 3rd fixture the 3, the 4th fixture 2 the most synchronously pursuit movement；During the pressure of top, the bending hydraulic means 9 in left side under the driving of its hoofing part mechanism to left movement so that its bending roll keeps the position corresponding to described first length section midpoint；When right extension limited block 43 to the first fixture 4 contacts with the left extension limited block of the 3rd fixture 3, the bending roll of the bending hydraulic means 9 in described left side stops top pressure, and dipper crowding gear 10 stops continuing to push forward；After dipper crowding gear 10 stops continuing to push forward, dipper crowding gear 10 keeps current pushing force horizontal stationary motionless 10 minutes, so that the part already bent into shape is carried out pressurize sizing；
I. retractility is propped up stay tube 120 and is bounced back by a stay tube telescoping mechanism 12 for dipper crowding gear 10 so that stay first length section from left to right in described three length sections and from left to right second length section do not supported, the 3rd length section is supported from left to right；
J. the bending hydraulic means 9 in the middle of starts second length section from left to right described in the pressure of top, until the left extension limited block of the right extension limited block of the 3rd fixture 3 and the 4th fixture 2 contacts；
K. dipper crowding gear 10 makes described retractility prop up stay tube 120 to be fully retracted, so that three length sections are not supported；
L. the bending hydraulic means 9 on right side starts the 3rd length section from left to right described in the pressure of top, until the left extension limited block of the right extension limited block of the 4th fixture 2 and the first fixture 1 contacts；
M. each fixture unclamps, and takes the heating furnace tube that bending machining is complete away.
Claims (1)
1. carry out adding hot fluid heats the linear type furnace tubing bending process of pressurize sizing, it uses a kind of linear type furnace tubing bending apparatus, described linear type furnace tubing bending apparatus includes left frame (13) and dipper crowding gear (10), dipper crowding gear (10) is in left frame (13) right, the rear portion, right side of described left frame (13) is fixedly connected with dovetail guide (15), dovetail guide (15) is the most horizontal-extending, the left end of dovetail guide (15) is fixing with described left frame (13) to be connected, the right-hand member of dovetail guide (15) is slidably connected with the dovetail groove in the rear portion of dipper crowding gear (10), the front portion of described left frame (13) is provided with the through hole passed for boiler tube；Slide the most successively between described left frame (13) and dipper crowding gear (10) on described dovetail guide (15) and be provided with three bending hydraulic means (9)；The front portion, left side of dipper crowding gear (10) is fixedly installed the first fixture (1), the right front of left frame (13) is fixedly installed the second fixture (4), it is provided with fromer rail between described left frame (13) and dipper crowding gear (10), described fromer rail is straight-line extension between the second fixture (4) and the first fixture (1), and when dipper crowding gear (10) slides along described dovetail guide (15), the first fixture (1) can slide along fromer rail towards the second fixture (4)；Between the second fixture (4) and the first fixture (1), the 3rd fixture (3) and the 4th fixture (2) it is provided with the most slidably on described fromer rail, four described fixtures (1,2,3,4) all 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) are oppositely disposed each along direction before and after in the plane of bending when described linear type furnace tubing generation plain bending, and are capable of contact clamping in clip base and separate the action unclamped；Wherein, described rear fixture block (41) is respectively positioned on described fromer rail rear, and is rectangular shape, and described front fixture block (82,42) is respectively positioned on described fromer rail front, and is cylindrical shape；The longitudinal axis of described rectangular shape and cylindrical shape is each perpendicular to plane of bending during described linear type furnace tubing generation plain bending；
Wherein, the right extension limited block (43) extended to the right it is provided with on the right flank of the rear fixture block of described second fixture (4), it is provided with the left extension limited block (14) extended to the left on the left surface of the rear fixture block of described first fixture (1), the left and right side of the rear fixture block of the 3rd fixture (3) and the 4th fixture (2) is provided with the left extension limited block extended to the left and the right extension limited block extended to the right respectively；
Each including in described three bending hydraulic means (9) drives hydraulic cylinder, and described driving hydraulic cylinder is arranged relative to the longitudinal axis orthogonal 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 roll (91), and drives hydraulic cylinder along the direction driving vertical with dovetail guide (15), bending roll (91) can be applied bend pipe thrust forward；Described three bending hydraulic means (9) the most also include hoofing part mechanism, bends hydraulic means (9) accordingly and slide into diverse location in order to drive respectively along dovetail guide (15)；
The right side of described dipper crowding gear (10) is provided with a stay tube telescoping mechanism (12), prop up stay tube telescoping mechanism (12) and be arranged on the front of described dovetail guide (15), stay tube telescoping mechanism (12) has retractility and props up stay tube (120), retractility props up stay tube (120) from the right side of dipper crowding gear (10) through leaving the left side of dipper crowding gear (10) and can be used in extending in described linear type furnace tubing, thus play and support the effect that boiler tube prevents boiler tube generation from undesirably bending, and can move back and forth in the lateral direction under the driving of a stay tube telescoping mechanism (12)；Described retractility props up stay tube can add hot fluid in the right-hand member of boiler tube stretches into boiler tube and to supply in boiler tube, and described linear type furnace tubing bending apparatus also includes heating fluid recycling apparatus (121), heating fluid recycling apparatus (121) can from the left end of described linear type furnace tubing reclaim described in add hot fluid, described in add hot fluid and boiler tube can be heated up thus beneficially flexural deformation；
Described linear type furnace tubing bending process comprises the steps:
A., linear type furnace tubing is provided；
B. described linear type furnace tubing is penetrated a through hole on described left frame (13) and advances to the right, until the length thereof of described linear type furnace tubing processing to be curved stretches out in described left frame (13)；
The left end of described linear type furnace tubing is clamped by the most described second fixture (4)；
D. dipper crowding gear (10) motion, so that the right-hand member of the first fixture (1) clamping linear type furnace tubing；
E. linear type furnace tubing is clamped between the second fixture (4) and the first fixture (1) by the 3rd fixture (3) and the 4th fixture (2), and makes the second fixture (4), the 3rd fixture (3), the 4th fixture (2) and the first fixture (1) that the forearm of linear type furnace tubing be separated into three length sections that length is equal；
Each in the most described three bending hydraulic means (9) makes its bending roll (91) contact the midpoint of corresponding each length section in described three length sections respectively；
Retractility is propped up in the pipe that stay tube (120) stretches into linear type furnace tubing by the stay tube telescoping mechanism (12) that G. dipper crowding gear (10) right side is arranged, and stay first length section from left to right in described three length sections not supported, from left to right second and the 3rd length section supported；Described retractility is propped up stay tube and is started to supply in described linear type furnace tubing to add hot fluid, and heat fluid recycling apparatus (121) to start to reclaim in described linear type furnace tubing to add hot fluid, described in add hot fluid described linear type furnace tubing heated up；
H. the bending roll of the bending hydraulic means (9) in left side starts outwards to push up first length section of pressure, thus bring it about linear bending, dipper crowding gear (10) synchronously follows pushing along with the carrying out of bending, meanwhile, and the 3rd fixture (3), the 4th fixture (2) the most synchronously pursuit movement；During the pressure of top, the bending hydraulic means (9) in left side under the driving of its hoofing part mechanism to left movement so that its bending roll keeps the position corresponding to described first length section midpoint；When right extension limited block (43) to the first fixture (4) contacts with the left extension limited block of the 3rd fixture (3), the bending roll of the bending hydraulic means (9) in described left side stops top pressure, and dipper crowding gear (10) stops continuing to push forward；After dipper crowding gear (10) stops continuing to push forward, dipper crowding gear (10) keeps current pushing force horizontal stationary motionless 10 minutes, so that the part already bent into shape is carried out pressurize sizing；
I. retractility is propped up stay tube (120) retraction by a stay tube telescoping mechanism (12) for dipper crowding gear (10), so that stay first length section from left to right in described three length sections and from left to right second length section do not supported, the 3rd length section is supported from left to right；
J. the bending hydraulic means (9) in the middle of starts second length section from left to right described in the pressure of top, until the left extension limited block of the right extension limited block of the 3rd fixture (3) and the 4th fixture (2) contacts；
K. dipper crowding gear (10) makes described retractility prop up stay tube (120) to be fully retracted, so that three length sections are not supported；
L. the bending hydraulic means (9) on right side starts the 3rd length section from left to right described in the pressure of top, until the left extension limited block of the right extension limited block of the 4th fixture (2) and the first fixture (1) contacts；
M. each fixture unclamps, and takes the heating furnace tube that bending machining is complete away.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410147411.3A CN103920767B (en) | 2014-04-14 | 2014-04-14 | A kind of bending process of linear type heating furnace tube |
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| CN201410147411.3A CN103920767B (en) | 2014-04-14 | 2014-04-14 | A kind of bending process of linear type heating furnace tube |
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| CN103920767B true CN103920767B (en) | 2016-08-17 |
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| CN103934328A (en) * | 2014-04-14 | 2014-07-23 | 苏培钦 | Linear type heating furnace tube bending technology |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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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| CN103920767A (en) | 2014-07-16 |
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