CN102500672A - Method and device for forming plates through gradual approximation bending - Google Patents
Method and device for forming plates through gradual approximation bending Download PDFInfo
- Publication number
- CN102500672A CN102500672A CN2011103263043A CN201110326304A CN102500672A CN 102500672 A CN102500672 A CN 102500672A CN 2011103263043 A CN2011103263043 A CN 2011103263043A CN 201110326304 A CN201110326304 A CN 201110326304A CN 102500672 A CN102500672 A CN 102500672A
- Authority
- CN
- China
- Prior art keywords
- curved surface
- time
- die mould
- resilience
- crooked
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Bending Of Plates, Rods, And Pipes (AREA)
Abstract
The invention discloses a method and a device for forming plates through gradual approximation bending on a three-dimensional numerical control plate bending machine (1). The method comprises the following steps of: performing targeted iteration gradual approximation bending by utilizing a resilience rule of a plate (5), comparing a shape of an actually formed curved surface B of the plate (5) subjected to pressing resilience with a shape of a theoretical target curved surface S through online measurement, and setting an approximation bending pressing curved surface C for limited approximation pressing according to an error offset value h after resilience. By the device, an online laser three-dimensional coordinate measuring instrument (4) connected with a computer is arranged on the three-dimensional numerical control plate bending machine (1). Complex mechanical calculation is not needed, the problem of bending resilience of a ship plate can be rapidly solved on line in real time, as long as the approximation bending pressing is performed for 1 to 3 times generally, the requirement on machining accuracy can be met, the problem of resilience of a numerically controlled bent plate is rapidly and effectively solved, the forming accuracy of a three-dimensional curved surface ship plate is guaranteed, and the method and the device have simple and rapid effects.
Description
One, technical field:
The present invention relates to a kind of crooked sheet material forming method and apparatus that progressively approaches, specifically a kind of be mainly used in that the enterprising andante material of three-dimension numerical controlled squeezer is shaped, progressively approach crooked sheet material forming method, and the device that is complementary is provided for the method.
Two, background technology:
Along with China's rapid economic development; Shipbuilding industry is also developing rapidly; When shipbuilding; Its ship hull plate member mostly is a curved surface, and the manufacturing of three-dimension curved surface plate material parts is an important link, so the three-dimension numerical controlled squeezer of hull three-dimension curved surface outer panel member processing is an important machinery processing apparatus.In existing three-dimension curved surface plate was shaped, though the precision of unitary mould drawing workpiece is good, quality is high, it was only applicable to produce in enormous quantities, and costs an arm and a leg; It can only be used for the spitkit of some typings.So unitary mould seldom is used in shipbuilding industry, this is owing to due to the reason that the batch of ship hull plate identical components is few, complex-shaped, yardstick is big.So for the ship hull plate member of simple curvature, generally be to use the method for three core rollers or hydraulic press to process at present; And for the ship hull plate member of complex three-dimensional curved surface; Then be to use the mechanical stamping method to carry out horizontal curvature processing in advance; On the basis of preliminarily forming; Use the method for flame forming plate to carry out buckling by manual work again, but the working condition of flame forming plate forming technology is poor, labour intensity big, require height, production efficiency to hang down inferior to workman's technical merit.
Once developed general multiple pressure hair style numerical control bent plate the seventies in past abroad, owing to multiple reason causes failure.Wherein once attempted to use theoretical calculation method to solve the resilience problem (seeing " technology of hull construction ", People's Transportation Press, in December, 1980,141 pages) of sheet material.
The problem that the three-dimensional bent plate resilience of people's research theory CALCULATING PREDICTION is also arranged now, not only tediously long, the accurate dyscalculia of computational process more is difficult to satisfy quick, the requirement of processing in real time of boats and ships sheet material.
The difficulty of ship hull plate processing for a change; Researched and developed a kind ofly, be used for the cold bending of the complex-curved ship hull plate member of ship hull plate with the three-dimension numerical controlled squeezer of boats and ships " curved surface forming device for adjustable segmented mold board of square rams; Chinese patent number: ZL 2,009 1 0014794.6 " principle development, that belong to restructural technology category.What add the design a kind ofly utilizes sheet material self rebound law and progressively approaches crooked sheet material forming method and apparatus to target iteration; Can be through on-line measurement, control bent plate in real time and be shaped, solve the resilience difficult problem and the forming accuracy that guarantees the three-dimension curved surface deck of boat of a multiple pressure numerical control squeezer of restructural technology quickly and effectively.
Three, summary of the invention:
The objective of the invention is to utilize sheet material self rebound law and to the crooked sheet material forming method of progressively approaching of target iteration, and the device that is complementary is provided for the method for the three-dimension numerical controlled squeezer of boats and ships provides a kind of.
Basic process of progressively approaching bending forming method of the present invention is: at first according to the curve form of modular group under the three-dimension numerical controlled squeezer of theory target curved surface S Adjusting Shape; Sheet material is colded pressing; The unloading back is by the sheet material resilience of die mould; Detect actual shaping curved surface B after the feedback press-formed plate material resilience for the first time through online laser three-D coordinate measuring apparatus online in real time
1Shape, relatively actual shaping curved surface B after the sheet material resilience
1The error deviation value h of shape and theory target curved surface S shape
1, the mistake to theory target curved surface S is bent direction on the basis of theoretical target curved surface S then, i.e. and the opposite direction of resilience increases a correction value g
1, correction value g
1=k * h
1K is a correction factor, sets and approaches crooked die mould curved surface C for the first time
1Set and approach crooked die mould curved surface C for the first time
1After, according to approaching for the first time crooked die mould curved surface C
1Adjust the curve form of modular group under the three-dimension numerical controlled squeezer, carry out the die mould second time, promptly approach for the first time crooked die mould.Behind the die mould, detect actual shaping curved surface B after the feedback press-formed plate material resilience for the second time for the second time again through online laser three-D coordinate measuring apparatus online in real time
2Shape, relatively actual shaping curved surface B after the sheet material resilience
2The error deviation value h of shape and theory target curved surface S shape
2, as deviant h
2Exceed the error range that theory target curved surface S allows, then carry out die mould for the third time, promptly approach for the second time crooked die mould.Approach for the second time crooked die mould curved surface C
2Setting, and approach for the first time crooked die mould curved surface C
1Roughly the same: be to approach crooked die mould curved surface C for the first time
1The basis on approach crooked die mould curved surface C to the first time
1The curved direction of mistake, i.e. the opposite direction of resilience increases a correction value g
2, correction value g
2=k * h
2K is a correction factor.Just in the curved direction of the mistake of theoretical target curved surface S, i.e. the opposite direction of resilience increases a stack correction value g '
2, stack correction value g '
2=g
1+ g
2=k * (h
1+ h
2).And the like, when die mould for the third time, promptly for the second time approach crooked die mould resilience after, online laser three-D coordinate measuring apparatus online in real time examine actual shaping curved surface B
3The error deviation value h of shape and theory target curved surface S shape
3Still exceed the error range that theory target curved surface S allows, then carry out die mould No. the 4th time, promptly approach crooked die mould for the third time ...Until meeting the error range that theory target curved surface S allows.
The n time approach crooked die mould curved surface C
nSetting, be in the curved direction of the mistake of theoretical target curved surface S, i.e. the opposite direction of resilience increases a stack correction value g '
n,
Stack correction value g '
n=g
1+ g
2+ ... + g
n=k * (h
1+ h
2+ ... + h
n);
That is: stack correction value g '
n=
g
n=k *
h
n
In the formula: k is a correction factor;
g
nBe behind the n time die mould, to approach crooked die mould curved surface C for 1 time at n ﹣
N ﹣ 1The basis on approach crooked die mould curved surface C for 1 time to n ﹣
N ﹣ 1The curved direction of mistake, i.e. the opposite direction of resilience increases a correction value g;
h
nAfter being the n time die mould resilience, actual shaping curved surface B
nThe error deviation value h of shape and theory target curved surface S shape.
Before sheet material is approached bending next time, need following modular group curved surface is revised adjustment by approaching crooked die mould curved surface C.As revising down the modular group curve form according to the error of actual shaping curve form and theory target curve form, produce " curved excessively " phenomenon sometimes, when producing " curved excessively " phenomenon, also can continue oppositely progressively to approach bending; At this moment, in the above-mentioned formula, be negative value in the h value of the die mould that produces " curved excessively " phenomenon.Progressively approach the efficient that die mould is shaped for improving, to avoid sheet material " curved excessively " as far as possible, ad hoc correction factor k, the correction displacement when reducing to revise down the modular group curve form is generally chosen correction factor k=0.7～0.9.
Its detailed process is following:
1, according to the following modular group curve form of the three-dimension numerical controlled squeezer of theory target curved surface S Adjusting Shape, the sheet material that needs moulding by being placed on down on the modular group, is handled three-dimension numerical controlled squeezer, sheet material is carried out the die mould first time.Behind the die mould, modular group in the lifting unloads the sheet material of die mould; Sheet material resilience under its elastic force effect behind the die mould for the first time, the actual shaping curved surface B first time of formation sheet material
1Through actual shaping curved surface B after online laser three-D coordinate measuring apparatus online in real time detection and the feedback press-formed plate material resilience for the first time
1Shape, and compare with theory target curved surface S shape, differentiate the shaping situation, measure deviant h for the first time
1
Said deviant h is press-formed plate material springback capacity between actual shaping curved surface B shape after the die mould resilience and theory target curved surface S shape, i.e. after the press-formed plate material resilience and the side-play amount between the theory target curved surface S shape; Deviant h for the first time
1Be press-formed plate material actual shaping curved surface B after the die mould resilience first time
1Deviant between shape and the theory target curved surface S shape; Next coming in order are analogized: deviant h for the second time
2Be press-formed plate material actual shaping curved surface B after the die mould resilience second time
2Deviant h between shape and the theory target curved surface S shape
2, deviant h3 is press-formed plate material deviant h between actual shaping curved surface B3 shape after the die mould resilience for the third time and theory target curved surface S shape for the third time
3...
2, according to the actual shaping curved surface B first time
1, theory target curved surface S and deviant h for the first time
1, set and approach crooked die mould curved surface C for the first time
1Approach for the first time crooked die mould curved surface C
1Be on the basis of theoretical target curved surface S, to increase a correction value g to " curved excessively " direction
1, correction value g
1=k * h
1K is a correction factor.Then according to approaching crooked die mould curved surface C the first time of setting
1Adjust the following modular group curve form of three-dimension numerical controlled squeezer, the sheet material behind die mould is for the first time carried out die mould second time (promptly approaching crooked die mould the first time).For the second time behind the die mould, modular group in the lifting, the sheet material of die mould unloads to the second time; Sheet material resilience under its elastic force effect behind the die mould for the second time, the actual shaping curved surface B second time of formation sheet material
2Again through actual shaping curved surface B after the press-formed plate material resilience for the second time of online laser three-D coordinate measuring apparatus online in real time feedback
2Shape, and compare with theory target curved surface S shape, differentiate the shaping situation, measure deviant h for the second time
2
3, according to measuring deviant h for the second time
2, with actual shaping curved surface B after the press-formed plate material resilience for the second time
2Compare with theory target curved surface S shape, like the actual shaping curved surface of the die mould second time B of sheet material
2Still exceed the error range that theory target curved surface S allows, then carry out die mould (promptly approaching for the second time crooked die mould) for the third time.Die mould promptly approaches for the second time crooked die mould for the third time, according to the actual shaping curved surface B second time
2, theory target curved surface S and deviant h for the second time
2, set and approach crooked die mould curved surface C for the second time
2Approach for the second time crooked die mould curved surface C
2Be to approach crooked die mould curved surface C for the first time
1The basis on increase the curved value of mistake g to " curved excessively " direction
2, cross curved value g
2=k * h
2K is a correction factor, and the value of correction factor k is 0.7～0.9.Then according to approaching crooked die mould curved surface C the second time of setting
2Adjust the following modular group curve form of three-dimension numerical controlled squeezer, the sheet material behind die mould is for the second time carried out die mould (promptly approaching crooked die mould the second time) for the third time.For the third time behind the die mould, modular group in the lifting unloads the sheet material of die mould for the third time; Sheet material resilience under its elastic force effect behind the die mould for the third time, the actual for the third time shaping curved surface B of formation sheet material
3Feed back actual shaping curved surface B after the press-formed plate material resilience for the third time through online laser three-D coordinate measuring apparatus online in real time again
3Shape, and compare with theory target curved surface S shape, differentiate the shaping situation, measure deviant h for the third time
3
According to measuring deviant h for the third time
3, with actual shaping curved surface B after the press-formed plate material resilience for the third time
3Compare with theory target curved surface S shape, like the actual shaping curved surface of the die mould for the third time B of sheet material
3Still exceed the error range that theory target curved surface S allows, then carry out No. the 4th die mould (promptly approaching crooked die mould for the third time).Its method and the like.The actual shaping curved surface B that behind die mould, obtains meets the error range that theory target curved surface S allows.
In order to realize actual shaping curve form after the resilience of online in real time feedback press-formed plate material; And compare with theory target curved surface S shape; Differentiate the shaping situation; Measure deviant h, the three-dimension numerical controlled squeezer of the present invention is provided with online laser three-D coordinate measuring apparatus, and online laser three-D coordinate measuring apparatus is connected with the computer of three-dimension numerical controlled squeezer.Online laser three-D coordinate measuring apparatus is arranged on a side of modular group on the three-dimension numerical controlled squeezer, and when three-dimension numerical controlled squeezer was implemented die mould to sheet material after, modular group in the lifting unloaded the sheet material of die mould; Sheet material resilience under its elastic force effect forms actual shaping curved surface B.When the actual shaping curved surface B of formation carries out the online in real time detection after the online laser three-D coordinate measuring apparatus of needs is to the sheet material resilience; To go up modular group and shift out down modular group; When being arranged on online laser three-D coordinate measuring apparatus on the modular group and shifting out down modular group, the actual shaping curved surface B of sheet material has been carried out online in real time scanning detected with last modular group.
Online laser three-D coordinate measuring apparatus also can be arranged on down the upside of modular group, also can move at following modular group upside along guide rail through guide rail.In the lifting after the modular group, online laser three-D coordinate measuring apparatus moves to down the upside of modular group through guide rail, the actual shaping curved surface B of sheet material is carried out online in real time scanning detect.
Online laser three-D coordinate measuring apparatus feeds back to computer with the situation that online in real time scanning detects; Computer is with the reality curved surface B shape that is shaped; And compare with theory target curved surface S shape; Still exceed the error range that theory target curved surface S allows like the actual shaping curved surface of sheet material die mould B, confirm to approach the curve form that crooked die mould curved surface C adjusts down modular group according to this method next time, carry out die mould again by computer.
The present invention be a kind of utilize sheet material self rebound law and to target iteration progressively approach bending method and device, through on-line measurement, control bent plate in real time and be shaped, carry out the limited die mould that approaches.Progressively approaching bending method is in the resilience control procedure; Measuring springback capacity is that online in real time obtains and calculates; Need not to carry out complicated Mechanics Calculation; Just can real-time online solve the bending springback problem of ship hull plate fast,, just can satisfy requirement on machining accuracy as long as generally carry out approaching for 1～3 time crooked die mould (i.e. No. 2～4 die moulds).Thereby also with regard to a difficult problem that has solved the resilience of numerical control bent plate quickly and effectively and the forming accuracy that has guaranteed the three-dimension curved surface deck of boat.
When the shaped sheet shape is carried out laser measurement, only need to measure and be positioned at the height coordinate of each pressure head central axis place sheet material of modular group down, only need also that when transferring shape the height of each pressure head of modular group is down revised adjustment and get final product.Therefore the resilience of sheet material control be accomplish in real time through the position of finite point on the control sheet material, have a simple and efficient effect.
Four, description of drawings
Fig. 1 is equipped with the three-dimension numerical controlled squeezer sketch map of online laser three-D coordinate measuring apparatus for the present invention;
Fig. 2 is online laser three-D coordinate measuring machine sketch map;
Fig. 3 progressively approaches the sketch map of the various curved surfaces in the bending method for sheet material.
Five, the specific embodiment:
Below in conjunction with the accompanying drawing illustrated embodiment, further specify the particular content that progressively approaches bending method and device and the course of work of sheet material forming of the present invention.
A side of modular group 3 is arranged on line laser three dimensional coordinate measuring machine 4 (shown in accompanying drawing 1) on three-dimension numerical controlled squeezer 1; Online laser three-D coordinate measuring machine 4 also can be arranged on the upside of the following modular group 2 of three-dimension numerical controlled squeezer 1 through track; Track is fixed on the three-dimension numerical controlled squeezer 1, and online laser three-D coordinate measuring machine 4 can move on track.
Its detailed process is following:
1, according to following modular group 2 curve forms of the three-dimension numerical controlled squeezer 1 of theory target curved surface S Adjusting Shape, the sheet material that needs moulding 5 by being placed on down on the modular group 2, is handled three-dimension numerical controlled squeezer 1, sheet material 5 is carried out the die mould first time.Behind the die mould, modular group 3 in the lifting, and the sheet material 5 of die mould is unloaded; Sheet material 5 resilience under its elastic force effect behind the die mould for the first time, the actual shaping curved surface B first time of formation sheet material 5
1To go up modular group 3 and shift out down modular group 2 upsides; The online in real time of when last modular group 3 shifts out following modular group 2 upsides, carrying out online laser three-D coordinate measuring apparatus 4 detects (if online laser three-D coordinate measuring machine 4 is following modular group 2 upsides that are arranged on three-dimension numerical controlled squeezer 1 through track; After then modular group 3 is gone up in lifting; Online laser three-D coordinate measuring machine 4 moves to down modular group 2 upsides through track and carries out the online in real time detection); When shaped sheet 5 shapes being carried out online in real time detection (being laser measurement); Only need to measure and be positioned at the height coordinate of each pressure head central axis place sheet material 5 of modular group 2 down, just can feed back actual shaping curved surface B after press-formed plate material 5 resiliences for the first time according to the height coordinate of each pressure head central axis place sheet material 5
1Shape (each detection method is roughly the same), and compare with theory target curved surface S shape, differentiate the shaping situation, measure deviant h for the first time
1
2, according to the actual shaping curved surface B first time
1, theory target curved surface S and deviant h for the first time
1, set and approach crooked die mould curved surface C for the first time
1Approach for the first time crooked die mould curved surface C
1Be on the basis of theoretical target curved surface S, to increase a correction value g to " curved excessively " direction
1, correction value g
1=k * h
1K is a correction factor, and the value of correction factor k is 0.7～0.9, and the value of correction factor k can be selected as required.Then according to approaching crooked die mould curved surface C the first time of setting
1Adjust following modular group 2 curve forms of three-dimension numerical controlled squeezer 1, the sheet material 5 behind die mould is for the first time carried out die mould second time (promptly approaching crooked die mould the first time).Behind the die mould, modular group 3 in the lifting for the second time, and the sheet material 5 of die mould unloads to the second time; Sheet material 5 resilience under its elastic force effect behind the die mould for the second time, the actual shaping curved surface B second time of formation sheet material 5
2Again through actual shaping curved surface B after press-formed plate material 5 resiliences for the second time of online laser three-D coordinate measuring apparatus 4 online in real time feedback
2Shape, and compare with theory target curved surface S shape, differentiate the shaping situation, measure deviant h for the second time
2
3, according to measuring deviant h for the second time
2, with actual shaping curved surface B after press-formed plate material 5 resiliences for the second time
2Compare with theory target curved surface S shape, like the actual shaping curved surface of the die mould second time B of sheet material 5
2Still exceed the error range that theory target curved surface S allows, then carry out die mould (promptly approaching for the second time crooked die mould) for the third time.Die mould promptly approaches for the second time crooked die mould for the third time, according to the actual shaping curved surface B second time
2, theory target curved surface S and deviant h for the second time
2, set and approach crooked die mould curved surface C for the second time
2Approach for the second time crooked die mould curved surface C
2Be to approach crooked die mould curved surface C for the first time
1The basis on to " curved excessively " direction curved value g of a mistake that superposes again
2, cross curved value g
2=k * h
2K is a correction factor, and the value of correction factor k is 0.7～0.9, and the value of correction factor k can be selected as required.Then according to approaching crooked die mould curved surface C the second time of setting
2Adjust following modular group 2 curve forms of three-dimension numerical controlled squeezer 1, the sheet material 5 behind die mould is for the second time carried out die mould (promptly approaching crooked die mould the second time) for the third time.Behind the die mould, modular group 3 in the lifting for the third time, and the sheet material 5 of die mould is for the third time unloaded; Sheet material 5 resilience under its elastic force effect behind the die mould for the third time, the actual for the third time shaping curved surface B of formation sheet material 5
3Feed back actual shaping curved surface B after press-formed plate material 5 resiliences for the third time through online laser three-D coordinate measuring apparatus 4 online in real time again
3Shape, and compare with theory target curved surface S shape, differentiate the shaping situation, measure deviant h for the third time
3
According to measuring deviant h for the third time
3, with actual shaping curved surface B after the press-formed plate material resilience for the third time
3Compare with theory target curved surface S shape, like the actual shaping curved surface of the die mould for the third time B of sheet material 5
3Still exceed the error range that theory target curved surface S allows, then carry out No. the 4th die mould (promptly approaching crooked die mould for the third time).Its method and the like.The actual shaping curved surface B that behind die mould, obtains meets the error range that theory target curved surface S allows.
Therefore, the present invention be a kind of utilize sheet material self rebound law and to target iteration progressively approach bending method and device, in the die mould process,, control bent plate in real time and be shaped through on-line measurement, carry out the limited die mould that approaches.When the shaped sheet shape is carried out laser measurement; Only need to measure the height coordinate of each pressure head central axis place sheet material of modular group under being positioned at; Only need also that when transferring shape the height of each pressure head of modular group is down revised adjustment and get final product, the resilience control of sheet material is through the position completion in real time of finite point on the control sheet material.In the resilience control procedure; Measuring springback capacity is that online in real time obtains and calculates; Need not to carry out complicated Mechanics Calculation; Just can real-time online solve the bending springback problem of ship hull plate fast,, just can satisfy requirement on machining accuracy as long as generally carry out approaching for 1～3 time crooked die mould (i.e. No. 2～4 die moulds).Thereby also with regard to a difficult problem that has solved the resilience of numerical control bent plate quickly and effectively and the forming accuracy that has guaranteed the three-dimension curved surface deck of boat.Reached simple and efficient effect.
Claims (3)
1. one kind is progressively approached crooked sheet material forming method; It is characterized in that: the curve form that at first descends modular group (2) according to the three-dimension numerical controlled squeezer of theory target curved surface S Adjusting Shape (1); Sheet material (5) is colded pressing; The unloading back is detected through online laser three-D coordinate measuring apparatus (4) online in real time by the sheet material of die mould (5) resilience, actual shaping curved surface B after feedback press-formed plate material (5) resilience for the first time
1Shape, relatively actual shaping curved surface B after sheet material (5) resilience
1The error deviation value h of shape and theory target curved surface S shape
1, the mistake to theory target curved surface S is bent direction on the basis of theoretical target curved surface S then, i.e. and the opposite direction of resilience increases a correction value g
1, correction value g
1=k * h
1, k is a correction factor, sets and approaches crooked die mould curved surface C for the first time
1Set and approach crooked die mould curved surface C for the first time
1After, according to approaching for the first time crooked die mould curved surface C
1Adjust the curve form of modular group (2) under the three-dimension numerical controlled squeezer (1), carry out the die mould second time, promptly approach for the first time crooked die mould; Behind the die mould, detect actual shaping curved surface B after feedback press-formed plate material (5) resilience for the second time for the second time again through online laser three-D coordinate measuring apparatus (4) online in real time
2Shape, relatively actual shaping curved surface B after sheet material (5) resilience
2The error deviation value h of shape and theory target curved surface S shape
2As deviant h
2Exceed the error range that theory target curved surface S allows, then carry out die mould for the third time, promptly approach for the second time crooked die mould; Approach for the second time crooked die mould curved surface C
2Setting, and approach for the first time crooked die mould curved surface C
1Roughly the same: be to approach crooked die mould curved surface C for the first time
1The basis on approach crooked die mould curved surface C to the first time
1The curved direction of mistake, i.e. the opposite direction of resilience increases a correction value g
2, correction value g
2=k * h
2Just in the curved direction of the mistake of theoretical target curved surface S, i.e. the opposite direction of resilience increases a stack correction value g '
2, stack correction value g '
2=g
1+ g
2=k * (h
1+ h
2); And the like Until meeting the error range that theory target curved surface S allows; The n time the setting that approaches crooked die mould curved surface Cn is in the curved direction of the mistake of theoretical target curved surface S, i.e. the opposite direction of resilience increases a stack correction value g '
n
Stack correction value g '
n=
g
n=k *
h
n
In the formula: k is a correction factor;
g
nBe behind the n time die mould, to approach crooked die mould curved surface C for 1 time at n ﹣
N ﹣ 1The basis on approach crooked die mould curved surface C for 1 time to n ﹣
N ﹣ 1The curved direction of mistake, i.e. the opposite direction of resilience increases a correction value g;
h
nAfter being the n time die mould resilience, actual shaping curved surface B
nThe error deviation value h of shape and theory target curved surface S shape.
2. a kind of crooked sheet material forming method of progressively approaching according to claim 1 is characterized in that: described correction factor k=0.7～0.9.
3. one kind is used for the device that progressively approaches crooked sheet material forming method according to claim 1; Include three-dimension numerical controlled squeezer (1); It is characterized in that: three-dimension numerical controlled squeezer (1) is provided with online laser three-D coordinate measuring apparatus (4); Online laser three-D coordinate measuring apparatus (4) is connected with the computer of three-dimension numerical controlled squeezer (1), online laser three-D coordinate measuring apparatus (4) be arranged on three-dimension numerical controlled squeezer (1) go up a side of modular group (3)/or through guide rail be arranged on down modular group (2) upside, and can be along guide rail side shifting on modular group (2) down.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103263043A CN102500672A (en) | 2011-10-25 | 2011-10-25 | Method and device for forming plates through gradual approximation bending |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103263043A CN102500672A (en) | 2011-10-25 | 2011-10-25 | Method and device for forming plates through gradual approximation bending |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102500672A true CN102500672A (en) | 2012-06-20 |
Family
ID=46212838
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011103263043A Pending CN102500672A (en) | 2011-10-25 | 2011-10-25 | Method and device for forming plates through gradual approximation bending |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102500672A (en) |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103240362A (en) * | 2013-05-06 | 2013-08-14 | 大连船舶重工集团装备制造有限公司 | Cold-forming device for ship body curved-surface planking |
| CN104772377A (en) * | 2014-01-13 | 2015-07-15 | 中南大学 | Complex profile induction stretch bending device with displacement probes |
| CN106891129A (en) * | 2015-12-18 | 2017-06-27 | 美国镁产品有限公司 | For the finishing machine and method of magnesium part |
| CN106734440B (en) * | 2016-12-30 | 2018-07-20 | 中国农业大学 | A kind of processing method and processing unit (plant) of tubing screw thread sigmoid |
| CN109622682A (en) * | 2018-12-26 | 2019-04-16 | 燕山大学 | Springback compensation method in a kind of heating bending process |
| CN110788172A (en) * | 2019-11-12 | 2020-02-14 | 云南建投机械制造安装工程有限公司 | Laser positioning bending machine and step-by-step forming method |
| CN111702054A (en) * | 2020-05-28 | 2020-09-25 | 江苏大学 | In-place shape-adjusting detection system and method for progressive forming of curved plate |
| CN111964579A (en) * | 2020-07-29 | 2020-11-20 | 江苏大学 | Measuring and shape-adjusting system and method for numerical control three-dimensional plate bending machine |
| CN111982021A (en) * | 2020-07-29 | 2020-11-24 | 江苏大学 | Portable three-dimensional visual inspection system and method for ship curved plate forming |
| CN112453160A (en) * | 2020-11-24 | 2021-03-09 | 李方 | Metal plate stamping correction method |
| CN112718943A (en) * | 2020-12-14 | 2021-04-30 | 寿县江淮船舶修造有限责任公司 | Metal workpiece bending equipment for ship processing plant |
| CN113953355A (en) * | 2021-11-02 | 2022-01-21 | 江南造船(集团)有限责任公司 | Method for forming bent plate by utilizing three-dimensional numerical control plate bending machine |
| CN116833293A (en) * | 2023-04-20 | 2023-10-03 | 吉林大学 | Closed loop stretch forming method of flexible stretch forming machine of electromagnetic clamp |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3212121B2 (en) * | 1991-04-08 | 2001-09-25 | 株式会社日立製作所 | Multipoint press for forming multi-curved surfaces and forming method thereof |
| CN201361652Y (en) * | 2009-03-12 | 2009-12-16 | 泰安市硕力液压设备厂 | Adjustable curved surface forming device provides with square pressure heads and used for boards of segmental mold |
-
2011
- 2011-10-25 CN CN2011103263043A patent/CN102500672A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3212121B2 (en) * | 1991-04-08 | 2001-09-25 | 株式会社日立製作所 | Multipoint press for forming multi-curved surfaces and forming method thereof |
| CN201361652Y (en) * | 2009-03-12 | 2009-12-16 | 泰安市硕力液压设备厂 | Adjustable curved surface forming device provides with square pressure heads and used for boards of segmental mold |
Non-Patent Citations (5)
| Title |
|---|
| 付文智等: "多点成形压力机及成形工艺的最新进展", 《机械科学与技术》 * |
| 刘纯国等: "大型3维板类件多点闭环成形的研究", 《中国机械工程》 * |
| 张海明等: "板材多点成形回弹补偿与控制的方法研究", 《塑性工程学报》 * |
| 李双印: "船体板冷压成形的回弹研究", 《中国优秀硕士学位论文全文数据库 工程科技I辑》 * |
| 王呈方等: "三维曲面船体外板成形加工的新方法", 《武汉理工大学学报（交通科学与工程版）》 * |
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103240362A (en) * | 2013-05-06 | 2013-08-14 | 大连船舶重工集团装备制造有限公司 | Cold-forming device for ship body curved-surface planking |
| CN104772377A (en) * | 2014-01-13 | 2015-07-15 | 中南大学 | Complex profile induction stretch bending device with displacement probes |
| CN106891129A (en) * | 2015-12-18 | 2017-06-27 | 美国镁产品有限公司 | For the finishing machine and method of magnesium part |
| US11638945B2 (en) | 2015-12-18 | 2023-05-02 | Magnesium Products of America, Inc. | Truing machine and method for magnesium components |
| CN106734440B (en) * | 2016-12-30 | 2018-07-20 | 中国农业大学 | A kind of processing method and processing unit (plant) of tubing screw thread sigmoid |
| CN109622682A (en) * | 2018-12-26 | 2019-04-16 | 燕山大学 | Springback compensation method in a kind of heating bending process |
| CN110788172A (en) * | 2019-11-12 | 2020-02-14 | 云南建投机械制造安装工程有限公司 | Laser positioning bending machine and step-by-step forming method |
| CN111702054A (en) * | 2020-05-28 | 2020-09-25 | 江苏大学 | In-place shape-adjusting detection system and method for progressive forming of curved plate |
| CN111982021A (en) * | 2020-07-29 | 2020-11-24 | 江苏大学 | Portable three-dimensional visual inspection system and method for ship curved plate forming |
| CN111964579B (en) * | 2020-07-29 | 2022-02-15 | 江苏大学 | Measuring and shape-adjusting system and method for numerical control three-dimensional plate bending machine |
| CN111964579A (en) * | 2020-07-29 | 2020-11-20 | 江苏大学 | Measuring and shape-adjusting system and method for numerical control three-dimensional plate bending machine |
| CN112453160A (en) * | 2020-11-24 | 2021-03-09 | 李方 | Metal plate stamping correction method |
| CN112718943A (en) * | 2020-12-14 | 2021-04-30 | 寿县江淮船舶修造有限责任公司 | Metal workpiece bending equipment for ship processing plant |
| CN112718943B (en) * | 2020-12-14 | 2024-06-04 | 上海丰昌船务工程有限公司 | Metal workpiece bending equipment for ship processing plant |
| CN113953355A (en) * | 2021-11-02 | 2022-01-21 | 江南造船(集团)有限责任公司 | Method for forming bent plate by utilizing three-dimensional numerical control plate bending machine |
| CN116833293A (en) * | 2023-04-20 | 2023-10-03 | 吉林大学 | Closed loop stretch forming method of flexible stretch forming machine of electromagnetic clamp |
| CN116833293B (en) * | 2023-04-20 | 2024-02-02 | 吉林大学 | Closed loop stretch forming method of flexible stretch forming machine of electromagnetic clamp |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102500672A (en) | Method and device for forming plates through gradual approximation bending | |
| Liu et al. | Principles and apparatus of multi-point forming for sheet metal | |
| CN106216523B (en) | Stamping die and strain forming capability detection method | |
| CN111229879B (en) | Springback ratio matrix description and springback compensation method for double-curvature plate forming springback | |
| CN106424260A (en) | Small-size corrugated sheet pressing method and device | |
| CN104139129A (en) | Multi-point forming technology-applied forming method for curved-surface ship board | |
| CN103465246A (en) | Rough casting marking-off method and marking-off device | |
| CN101450365B (en) | One-time pressure-molding technique for marine water-jet propulsion passage aluminum double curved plate | |
| CN201618800U (en) | U-shaped self-bearing weight mould with adjustable bending springback angle | |
| CN206153342U (en) | Small -size ripple sheet metal suppression device | |
| CN201855876U (en) | Die structure for compensating bending springback angle | |
| Liu et al. | Optimization of post-stretching elongation in stretch bending of aluminum hollow profile | |
| CN102814379A (en) | Numerical control multi-point die-free hydraulic bulging system for continuous formation of board | |
| CN202239126U (en) | Special electro-hydraulic servo numerical-control bending machine for closed work piece | |
| Fiorentino et al. | Analysis of forces, accuracy and formability in positive die sheet incremental forming | |
| CN101367097A (en) | Reaction type angle control digital control plate bender | |
| CN105562467A (en) | Method for on-line real-time detection controlled rapid bend forming of plate | |
| CN102728696B (en) | Numerical control multiple spot dieless hydro-bulging technique and numerical control multiple spot dieless hydro-bulging equipment | |
| CN204799814U (en) | Titanium alloy multiple spot resilience compensation arrangement that takes shape | |
| CN104001762B (en) | Flexibility compensation method for large-scale bending machine die | |
| Ghanei et al. | Analysis of material behaviour and shape defect compensation in the flexible roll forming of advanced high strength steel | |
| CN105382107B (en) | Sheet Metal Surface shaping and punching mold | |
| CN203541186U (en) | Computer numerical control plate bending machine for three-dimensional curved plates | |
| CN104475574B (en) | A kind of clod wash mould utilizing hydraulic press to carry out section bar clod wash and cold-bending method | |
| CN207887727U (en) | A kind of elastic piece nut diel |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20120620 |