CN106345869A - Method and device for forming large-pipe-diameter small-bending-radius thin-wall conduit - Google Patents
Method and device for forming large-pipe-diameter small-bending-radius thin-wall conduit Download PDFInfo
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- CN106345869A CN106345869A CN201610798028.3A CN201610798028A CN106345869A CN 106345869 A CN106345869 A CN 106345869A CN 201610798028 A CN201610798028 A CN 201610798028A CN 106345869 A CN106345869 A CN 106345869A
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- Prior art keywords
- bend
- conduit
- bending
- plug
- guide module
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D9/00—Bending tubes using mandrels or the like
- B21D9/01—Bending tubes using mandrels or the like the mandrel being flexible and engaging the entire tube length
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D9/00—Bending tubes using mandrels or the like
- B21D9/05—Bending tubes using mandrels or the like co-operating with forming members
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/26—Methods of annealing
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/08—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for tubular bodies or pipes
Abstract
The invention relates to a method and device for forming a large-pipe-diameter small-bending-radius thin-wall conduit and belongs to the technical field of plastic processing in bent pipe manufacturing. The method and device for forming the large-pipe-diameter small-bending-radius thin-wall conduit can achieve bending forming after one-time clamping, and solve the problems caused by the situations that in the prior art, traditional casting pipelines are adopted for replacing part of tubular product pipelines, two or more half pipes are adopted for butt welding, or bent pipes with ovality largely exceeding the standard are adopted. The whole method for forming the large-pipe-diameter small-bending-radius thin-wall conduit is practicable and reliable, the whole device for forming the large-pipe-diameter small-bending-radius thin-wall conduit is reasonable in structure, operation is convenient, the quality of bent pipes can be guaranteed, and production efficiency is greatly improved. The formed conduit can meet the requirements for aerospace crafts.
Description
Technical field
The present invention relates to bend pipe manufactures Technology of Plastic Processing field and in particular to a kind of Large Diameter Pipeline small-bend radius thin-walled is led
Pipe manufacturing process and its device.
Background technology
Metal pipe material is high due to having the advantages that lightweight, intensity, is widely used in structural member in the fields such as machinery, automobile
Manufacture, simultaneously can also as various fluid media (medium)s transmission carrier.The supply of material state of tubing mostly is straight tube, in practical application
When, a lot of occasions are required for being curved in advance processing, can according to requirements select different processing methods, and wherein numerical control is curved
Pipe machine can as requested accurately, smoothly carry out the bending machining of tubing, forming accuracy is high, technology stability is good, is suitable for
The precision bending of various tubing shapes.
In recent years, small-bend radius (relative bending radius r/d≤2, r- bending radius, d- tube outer diameter) thin-winding pipe part
Increasingly extensive application in the high-tech sectors such as Aeronautics and Astronautics.Large Diameter Pipeline small-bend radius thin-wallconduit is mainly used in installing sky
Between little, occasion that modular construction is compact convey in liquid or the low pressure line of gaseous fluid, be used for aerospace flight vehicle combustion
The field such as oil system and gas extraction system.With the light-weighted growth requirement of aircraft, whole aircraft interior electrical equipment and leading
The cooperation of pipe is more and more tightr, and the bulk requirement to electromotor is the smaller the better, thus the small-bend radius in whole system
The demand of conduit is also more come also big.
At present because being limited by equipment, mould and tube material in terms of the processing of Large Diameter Pipeline little bending bend pipe, in technique
Never obtain big breakthrough, so being also difficult to so far provide the product complying fully with requirement.Because in thin-wall numerical-controlled bend-pipe
During, reducing bending radius will increase wrinkling trend, wall thickness reduction and the cross section distortion degree of pipe fitting, exacerbate thin-winding pipe
The shaping difficulty of part, thus restriction and the overall manufacture level reducing elbow member.In order to obtain small-bend radius pipe fitting, sometimes not
Obtain and do not adopt traditional foundry goods pipeline to replace part tubing pipeline, adopt two semicanals or two or more semicanal welding mode,
Or the bend pipe using ovality severe overweight.But due to increased multiple-pass weld on conduit, it is susceptible to fracture and seepage feelings
Condition, thus functional reliability is all poor, leads to the serviceability of pipe fitting to reduce；Be necessarily large and bulky because cast product has volume,
Work surface is coarse and has been also easy to sand hole；The bend pipe of ovality severe overweight is easily caused flow and does not reach design requirement；And
The bend radius bent pipe of more than 2.0d can lead to electromotor bulky.Thus development Large Diameter Pipeline thin-wall tube of small bend radius material is curved
Bent technology has become key issue in the urgent need to address and important development direction.
Content of the invention
(1) technical problem to be solved
The technical problem to be solved in the present invention is: how to design a kind of Large Diameter Pipeline small-bend radius thin-wallconduit manufacturing process
And its device, with solve adopt in the past traditional foundry goods pipeline replacement part tubing pipeline, adopt two semicanals or two with
Upper tube half welding mode, or the problem brought using the bend pipe of ovality severe overweight.
(2) technical scheme
In order to solve above-mentioned technical problem, the invention provides a kind of Large Diameter Pipeline small-bend radius thin-wallconduit becomes shape dress
Put, pipe bundle clip 1, guide module 2, plug 3, fixture block 4, wheel mould 5, wrinkle resistant piece 6 and wheel folder 7；
The inner arc surface that described guide module 2, wheel folder 7 and fixture block 4 are contacted with conduit is respectively provided with certain extra coarse degree, or logical
Cross score line, or be threaded the clamping friction power to increase during going for a stroll；Described wheel folder 7 and fixture block 4 inner arc surface
Arc radius little 0.02～0.05mm than conduit principal radii, the arc radius of described guide module 2 inner arc surface are more theoretical than conduit
Little 0.05～the 0.1mm of radius, the length of guide module 2 is big 10～14 times at least than conduit diameter；Described wheel mould 5 pass through centre bore with
Bending machine locating shaft positions；Described wheel folder 7, fixture block 4 and guide module 2 are positioned with bending machine by way of dovetail groove；Described bundle
Pipe clamp 1 is positioned with bending machine by way of trip bolt is spirally connected；Mandrel on described plug 3 and bending machine is spirally connected positioning；Institute
The exterior arc surface stating wrinkle resistant piece 6 is fitted with the inner arc surface of wheel mould 5, and by the dovetail groove on wrinkle resistant piece 6 and bending machine
Locating piece positions.
Preferably, the inner arc surface that described guide module 2, wheel folder 7 and fixture block 4 are contacted with conduit is respectively provided with more than 6.3
Extra coarse degree.
Preferably, described trace wire depth is less than 0.15mm.
Preferably, the described depth of thread is less than 0.1mm.
Preferably, described plug 3 includes the core ball 3-1 positioned at the front end and circular barred body 3-2 being located at rear end.
Preferably, described core ball 3-1 and circular barred body 3-2 link.
Present invention also offers a kind of method realizing the shaping of Large Diameter Pipeline small-bend radius thin-wallconduit using described device,
120 ° of conduit is more than for angle of bend, is divided into two shaping stages, first stage using 90 ° as theory angle of bend,
Carry out step s1～s5, when angle of bend reaches 90 °, back out fixture block 4 and guide module 2, take off conduit and carry out intermediate annealing, move back
Fiery temperature value adds 20 DEG C for recrystallization annealing temperature, temperature retention time 0.5～1.0h, with stove cooling；Second stage, with angle of bend
On the basis of spending for the wheel mould 5 when 90 °, clamp fixture block 4 and guide module 2, curved as theory using the final angle of bend more than 120 °
Bent angle, carries out step s4～s5, until it reaches theoretical angle of bend；Angle of bend is more than to 120 ° of conduit, directly holds
Row step s1～s5:
S1, the theoretical cutting length of calculating conduit, and carry out sawing；
S2, the conduit completing blanking is annealed, annealing temperature adds 10 DEG C, during insulation in recrystallization annealing temperature value
Between 1.0～1.5h, with stove cooling；
S3, apply lubricating oil in the contact surface of plug 3 and conduit, the axial location of the plug 3 of adjustment belt carcass ball, so that
The circular barred body 3-2 of plug 3 forward extends out the point of contact 0.7～1.5mm of wheel mould 5 and plug 3, and by after the recrystallization annealing of step s2
Conduit clamping feeding is carried out by pipe bundle clip 1, gripping block 4 and wheel folder 7 are adjusted to correct position, so that gripping block 4, wheel folder
7th, the intrados longitudinal center line of guide module 2, plug 3 and wrinkle resistant piece 6 five overlaps；
S4, in 5 °～8 ° before BENDING PROCESS reaches theoretical angle of bend of plug 3, carry out the core pulling of plug 3 in advance
Retreat, move back core speed between 1～2.5mm/s, to ensure, while reaching theoretical angle of bend, to complete plug 3 foremost
Core ball 3-1 backs to the cusp position of wheel mould 5 and plug 3；
S5, while guiding-tube bend, carry out auxiliary pushing away curved, the bending forming of gripping block 4 and wheel folder 7 using guide module 2
Speed 2～4mm/s, auxiliary pushes away speed 0.5～1mm/s bigger than the rate of bending of gripping block 4 and wheel folder 7；The auxiliary of guide module 2 pushes away work
Before BENDING PROCESS reaches theoretical angle of bend when 6 °～10 °, the auxiliary speed that pushes away of guide module 2 is adjusted to and tight block 4 and wheel folder 7
Speed consistent.
(3) beneficial effect
A kind of Large Diameter Pipeline small-bend radius thin-wallconduit manufacturing process and its device that the present invention provides, can once fill
Brake forming in folder, solves and adopts traditional foundry goods pipeline to replace part tubing pipeline, adopt two semicanals or two in the past
Individual in upper tube half welding mode, or the problem brought using the bend pipe of ovality severe overweight.Whole manufacturing process and device
Rational in infrastructure, method is feasible and reliable, easy to operate and can ensure that bending quality, substantially increases the efficiency of production.Shape
Conduit disclosure satisfy that aerospace flight vehicle requirement.
Brief description
Fig. 1 is the structural representation of the forming device of the embodiment of the present invention；
Fig. 2 is the structural representation of plug in the embodiment of the present invention.
Specific embodiment
For making the purpose of the present invention, content and advantage clearer, with reference to the accompanying drawings and examples, to the present invention's
Specific embodiment is described in further detail.
Embodiment 1:
As shown in Figure 1 and Figure 2, embodiments provide a kind of Large Diameter Pipeline small-bend radius thin-wallconduit forming device,
Wherein used pipe bundle clip 1, the plug 3 of belt carcass ball, wrinkle resistant piece 6 and wheel mould 5 all can adopt known NORMAL BEND mould
It is designed, only wheel folder 7, gripping block 4 and guide module 2 are carried out with new " compensation " design.Wherein: guide module 2, wheel folder 7 and folder
The inner arc surface that block 4 is contacted with conduit is respectively provided with larger extra coarse degree (roughness is more than 6.3) or passes through score line (cut
Depth is less than 0.15mm) or be threaded (depth of thread be less than 0.1mm) and to increase the clamping friction during going for a stroll
Power；The arc radius of wheel folder 7 and fixture block 4 inner arc surface little 0.02～0.05mm, guide module 2 inner arc surface than conduit principal radii
Arc radius than conduit principal radii little 0.05～0.1mm, the length of guide module 2 is big 10～14 at least than conduit diameter
Times.Wheel mould 5 passes through centre bore and bending machine locating shaft and positions, wheel folder 7, fixture block 4 and guide module 2 by way of dovetail groove with curved
Pipe machine positions, and pipe bundle clip 1 is positioned with bending machine by way of trip bolt is spirally connected, the core on the plug 3 of core ball and bending machine
Axle is spirally connected positioning, and wrinkle resistant piece 6 of exterior arc surface fit with the inner arc surface of wheel mould 5, and the dovetail groove on passing through wrinkle resistant piece 6 with curved
Locating piece positioning on pipe machine.
Embodiment 2:
The Aluminum Alloy Tube that the present embodiment is selected is 5a03 tubing, and specification is φ 38mm × 1.5mm (tube outer diameter × wall
Thick), bending radius is r60, and that is, relative bending radius (bending radius/tube outer diameter) is about 1.6, and angle of bend is 80 °.
As shown in Figure 1 and Figure 2, the Large Diameter Pipeline small-bend radius thin-wallconduit forming technology flow process that the present embodiment is adopted is such as
Under, comprise the steps:
1) calculate the theoretical cutting length of conduit, and complete sawing.
2) conduit completing blanking is annealed, annealing temperature adds 10 DEG C in recrystallization annealing temperature value, annealing temperature
Spend for 375 DEG C, temperature retention time 1.0h, with stove cooling.
3) lubricating oil, reducing friction resistance are applied in the plug 3 of belt carcass ball with the contact surface of conduit.The axle of adjustment plug 3
To position it is ensured that the circular barred body 3-2 part of plug 3 stretches out wheel mould 5 and plug 3 point of contact 0.8mm.And by step 2) recrystallization annealing
Conduit afterwards carries out clamping feeding by pipe bundle clip 1.Gripping block 4 and wheel folder 7 are adjusted to correct position, so that gripping block 4, wheel
The intrados longitudinal center line of folder 7, guide module 2, plug 3 and wrinkle resistant piece 6 five overlaps.
4) in order to prevent conduit from internal scratch occurring in BENDING PROCESS or depression occur, the plug 3 of setting belt carcass ball
Before BENDING PROCESS reaches theoretical angle of bend when 6 °, when that is, angle of bend reaches 74 °, after carrying out the core pulling of plug 3 in advance
Move back, moving back core speed is 1.5mm/s it is ensured that while reaching theoretical angle of bend, core ball 3-1 retreats foremost to complete plug 3
Cusp position to wheel mould 5 and plug 3.
5) in order to prevent the Pull crack defect of the excessive appearance of the little plastic deformation of bending radius, increase the confession during duct forming
Material, reduces bending tube forming resistance.While guiding-tube bend, using guide module 2 carry out auxiliary push away curved, gripping block 4 and wheel folder 7
Bending forming speed 2.5mm/s, the auxiliary speed that pushes away should be bigger with wheel folder 7 rate of bending than gripping block 4 for 0.6mm/s, and that is, the auxiliary speed that pushes away is
3.1mm/s；The auxiliary of guide module 2 pushes away when being operated in BENDING PROCESS and reaching 8 ° before theoretical angle of bend, and that is, angle of bend reaches 72 °
When, the auxiliary speed that pushes away of guide module 2 is adjusted to, as 2.5mm/s consistent with the speed of tight block 4 and wheel folder 7.
6) take off formed Large Diameter Pipeline small-bend radius thin-wallconduit, inspection overall dimensions meet design requirement and then hand over product
Product.
Embodiment 3:
The Aluminum Alloy Tube that the present embodiment is selected is 5a03 tubing, and specification is φ 38mm × 1.5mm (tube outer diameter × wall
Thick), bending radius is r60, and that is, relative bending radius (bending radius/tube outer diameter) is about 1.6, and angle of bend is 150 °.
As shown in Figure 1 and Figure 2, the Large Diameter Pipeline small-bend radius thin-wallconduit forming technology flow process that the present embodiment is adopted is such as
Under, comprise the steps:
1) calculate the theoretical cutting length of conduit, and complete sawing.
2) conduit completing blanking is annealed, annealing temperature adds 10 DEG C in recrystallization annealing temperature value, annealing temperature
Spend for 375 DEG C, temperature retention time 1.0h, with stove cooling.
3) lubricating oil, reducing friction resistance are applied in the plug 3 of belt carcass ball with the contact surface of conduit.The axle of adjustment plug 3
To position it is ensured that the circular barred body (3-2) of plug 3 partly stretches out the point of contact 0.8mm of wheel mould 5 and plug 3.And by step 2) recrystallization
Conduit after annealing carries out clamping feeding by pipe bundle clip 1.Gripping block 4 and wheel folder 7 are adjusted to correct position, so that gripping block
4th, the intrados longitudinal center line of wheel folder 7, guide module 2, plug 3 and wrinkle resistant piece 6 five overlaps.
4) in order to prevent conduit from internal scratch occurring in BENDING PROCESS or depression occur, the plug 3 of setting belt carcass ball
Before BENDING PROCESS reaches theoretical angle of bend when 6 °, when that is, angle of bend reaches 84 °, after carrying out the core pulling of plug 3 in advance
Move back, moving back core speed is 1.5mm/s it is ensured that while reaching theoretical angle of bend, core ball 3-1 retreats foremost to complete plug 3
Cusp position to wheel mould 5 and plug 3.
5) in order to prevent the Pull crack defect of the excessive appearance of the little plastic deformation of bending radius, increase the confession during duct forming
Material, reduces bending tube forming resistance.While guiding-tube bend, using guide module 2 carry out auxiliary push away curved, gripping block 4 and wheel folder 7
Bending forming speed 2.5mm/s, the auxiliary speed that pushes away should be bigger with wheel folder 7 rate of bending than gripping block 4 for 0.6mm/s, and that is, the auxiliary speed that pushes away is
3.1mm/s；The auxiliary of guide module 2 pushes away when being operated in BENDING PROCESS and reaching 8 ° before theoretical angle of bend, and that is, angle of bend reaches 82 °
When, the auxiliary speed that pushes away of guide module 2 is adjusted to, as 2.5mm/s consistent with the speed of tight block 4 and wheel folder 7.
6) due to being the conduit of 150 ° of angle of bend in the present embodiment, therefore when angle of bend reaches 90 °, back out fixture block
4 and guide module 2, take off conduit and carry out intermediate annealing, annealing temperature value adds 20 DEG C for recrystallization annealing temperature, as 385 DEG C, protect
Warm time 0.5h, with stove cooling；Subsequently enter second stage, on the basis of the wheel mould 5 being when 90 ° by angle of bend, clamping
Fixture block 4 and guide module 2, using final 150 ° of angle of bend as theoretical angle of bend, execution step 7) -8), until it reaches reason
By 150 ° of angle of bend.
7) in order to prevent conduit from internal scratch occurring in BENDING PROCESS or depression occur, the plug 3 of setting belt carcass ball
Before BENDING PROCESS reaches theoretical angle of bend when 6 °, when that is, angle of bend reaches 144 °, after carrying out the core pulling of plug 3 in advance
Move back, move back core speed be 1.5mm/s it is ensured that while reaching theoretical angle of bend, complete plug 3 foremost after core ball (3-1)
Fall back on wheel mould 5 center phase tangent position.
8) in order to prevent the Pull crack defect of the excessive appearance of the little plastic deformation of bending radius, increase the confession during duct forming
Material, reduces bending tube forming resistance.While guiding-tube bend, using guide module 2 carry out auxiliary push away curved, gripping block 4 and wheel folder 7
Bending forming speed 2.5mm/s, the auxiliary speed that pushes away should be bigger with wheel folder 7 rate of bending than gripping block 4 for 0.6mm/s, and that is, the auxiliary speed that pushes away is
3.1mm/s；The auxiliary of guide module 2 pushes away when being operated in BENDING PROCESS and reaching 8 ° before theoretical angle of bend, and that is, angle of bend reaches
When 142 °, the auxiliary speed that pushes away of guide module 2 is adjusted to, as 2.5mm/s consistent with the speed of tight block 4 and wheel folder 7.
9) take off formed Large Diameter Pipeline small-bend radius thin-wallconduit, inspection overall dimensions meet design requirement and then hand over product
Product.
The above is only the preferred embodiment of the present invention it is noted that ordinary skill people for the art
For member, on the premise of without departing from the technology of the present invention principle, some improvement can also be made and deform, these improve and deform
Also should be regarded as protection scope of the present invention.
Claims (7)
1. a kind of Large Diameter Pipeline small-bend radius thin-wallconduit forming device is it is characterised in that pipe bundle clip (1), guide module (2), core
Excellent (3), fixture block (4), wheel mould (5), wrinkle resistant piece (6) and wheel folder (7)；
The inner arc surface that described guide module (2), wheel folder (7) and fixture block (4) are contacted with conduit is respectively provided with certain extra coarse degree, or
By score line, or it is threaded the clamping friction power to increase during going for a stroll；Described wheel folder (7) and fixture block (4) inner circle
The arc radius of cambered surface little 0.02～0.05mm than conduit principal radii, the arc radius ratio of described guide module (2) inner arc surface
Little 0.05～the 0.1mm of conduit principal radii, the length of guide module (2) is big 10～14 times at least than conduit diameter；Described wheel mould (5)
Positioned with bending machine locating shaft by centre bore；Described wheel folder (7), fixture block (4) and guide module (2) by way of dovetail groove and
Bending machine positions；Described pipe bundle clip (1) is positioned with bending machine by way of trip bolt is spirally connected；Described plug (3) and bend pipe
Mandrel on machine is spirally connected positioning；The exterior arc surface of described wrinkle resistant piece (6) is fitted with the inner arc surface of wheel mould (5), and by wrinkle resistant
Dovetail groove on block (6) is positioned with the locating piece on bending machine.
2. device as claimed in claim 1 is it is characterised in that described guide module (2), wheel press from both sides (7) and fixture block (4) and conduit phase
The inner arc surface of contact is respectively provided with more than 6.3 extra coarse degree.
3. device as claimed in claim 1 is it is characterised in that described trace wire depth is less than 0.15mm.
4. device as claimed in claim 1 is it is characterised in that the described depth of thread is less than 0.1mm.
5. the device as any one of Claims 1-4 is it is characterised in that described plug 3 includes the core ball positioned at front end
(3-1) the circular barred body (3-2) with positioned at rear end.
6. device as claimed in claim 5 is it is characterised in that described core ball (3-1) and circular barred body (3-2) link.
7. a kind of method realizing the shaping of Large Diameter Pipeline small-bend radius thin-wallconduit using the device described in claim 5 or 6, its
It is characterised by, angle of bend being more than to 120 ° of conduit, being divided into two shaping stages, first stage is using 90 ° as theory
Angle of bend, carries out step s1～s5, when angle of bend reaches 90 °, backs out fixture block (4) and guide module (2), takes off conduit and enter
Row intermediate annealing, annealing temperature value adds 20 DEG C for recrystallization annealing temperature, temperature retention time 0.5～1.0h, with stove cooling；Second
In the stage, on the basis of the wheel mould (5) being when 90 ° by angle of bend, clamp fixture block (4) and guide module (2), to be finally more than 120 °
Angle of bend, as theoretical angle of bend, carries out step s4～s5, until it reaches theoretical angle of bend；Angle of bend is more than
120 ° of conduit, direct execution step s1～s5:
S1, the theoretical cutting length of calculating conduit, and carry out sawing；
S2, the conduit completing blanking is annealed, annealing temperature adds 10 DEG C in recrystallization annealing temperature value, temperature retention time
1.0～1.5h, with stove cooling；
S3, apply lubricating oil in the contact surface of plug (3) and conduit, the axial location of the plug 3 of adjustment belt carcass ball, so that core
The circular barred body (3-2) of excellent (3) forward extends out the point of contact 0.7～1.5mm of wheel mould (5) and plug (3), and step s2 is recrystallized
Conduit after annealing carries out clamping feeding by pipe bundle clip (1), and gripping block (4) and wheel folder (7) are adjusted to correct position, so that
The intrados longitudinal center line of gripping block (4), wheel folder (7), guide module (2), plug (3) and wrinkle resistant piece (6) five overlaps；
S4, in 5 °～8 ° before BENDING PROCESS reaches theoretical angle of bend of plug (3), carry out the core pulling of plug (3) in advance
Retreat, move back core speed between 1～2.5mm/s, to ensure while reaching theoretical angle of bend, complete plug (3) before
End core ball (3-1) backs to the cusp position of wheel mould (5) and plug (3)；
S5, while guiding-tube bend, carry out auxiliary pushing away curved, gripping block (4) and wheel folder the bending to of (7) using guide module (2)
Shape speed 2～4mm/s, the auxiliary big 0.5～1mm/s of rate of bending pushing away speed ratio gripping block (4) and wheel folder (7)；Guide module (2)
Auxiliary push away when being operated in BENDING PROCESS and reaching 6 °～10 ° before theoretical angle of bend, by guide module (2) auxiliary push away speed be adjusted to tightly
Block (4) is consistent with the speed of wheel folder (7).
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108213134A (en) * | 2018-01-02 | 2018-06-29 | 常熟骏驰科技有限公司 | A kind of compensation device for the curved position material extension of automobile shape tube |
| CN111389980A (en) * | 2020-03-20 | 2020-07-10 | 苏州工业园区良裕科技有限公司 | Control method and system for powerful post-boosting pipe bending of pipe bending machine |
| CN114309127A (en) * | 2020-09-29 | 2022-04-12 | 郑州万达重工股份有限公司 | Inner wall surfacing small-bending-radius bent pipe and forming method thereof |
| CN114558918A (en) * | 2022-03-25 | 2022-05-31 | 昌河飞机工业（集团）有限责任公司 | Bending forming method for large-pipe-diameter thin-walled pipe without transition in middle |
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| CN108213134A (en) * | 2018-01-02 | 2018-06-29 | 常熟骏驰科技有限公司 | A kind of compensation device for the curved position material extension of automobile shape tube |
| CN111389980A (en) * | 2020-03-20 | 2020-07-10 | 苏州工业园区良裕科技有限公司 | Control method and system for powerful post-boosting pipe bending of pipe bending machine |
| CN114309127A (en) * | 2020-09-29 | 2022-04-12 | 郑州万达重工股份有限公司 | Inner wall surfacing small-bending-radius bent pipe and forming method thereof |
| CN114309127B (en) * | 2020-09-29 | 2023-09-26 | 郑州万达重工股份有限公司 | Inner wall surfacing small bending radius bent pipe and forming method thereof |
| CN114558918A (en) * | 2022-03-25 | 2022-05-31 | 昌河飞机工业（集团）有限责任公司 | Bending forming method for large-pipe-diameter thin-walled pipe without transition in middle |
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