CN106294940B - A kind of space large size bending round steel pipe multi-process accumulated error control method - Google Patents
A kind of space large size bending round steel pipe multi-process accumulated error control method Download PDFInfo
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- CN106294940B CN106294940B CN201610613020.5A CN201610613020A CN106294940B CN 106294940 B CN106294940 B CN 106294940B CN 201610613020 A CN201610613020 A CN 201610613020A CN 106294940 B CN106294940 B CN 106294940B
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- G06—COMPUTING; CALCULATING OR COUNTING
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- G06F30/00—Computer-aided design [CAD]
- G06F30/10—Geometric CAD
- G06F30/17—Mechanical parametric or variational design
Abstract
The invention discloses a kind of space large sizes to be bent round steel pipe multi-process accumulated error control method.Go out an adjusting angle in bending round steel pipe assembly plane machining according to national standard, next section of bend pipe to be assembled spatially show as rotating an adjusting angle around the assembled coordinate origin in part；Adjusting angleIt is around splicing planeAxis rotation, while can be aroundAxis andAxis rotation；Three-dimensional coordinate adjusted is used as objective function at a distance from design three-dimensional coordinate, using the requirement in standardizing as constraint condition, establishes the mathematical model of accumulated error optimization；Design a model three-dimensional coordinate parameter in conjunction with space large size curved tube, using design point three-dimensional coordinate and it is practical it is assembled after two groups of parameters of coordinate be used as objective function, the optimal solution of adjusting angle is calculated in substitution curvature of space round tube accumulated error control mathematical model.The present invention is suitable for the control of the large spans such as monster fair shop, transport hub, Olympic Games sports ground, major diameter curvature of space round steel pipe processing accumulated error.
Description
Technical field
The present invention relates to curved tube accumulated error control methods more particularly to a kind of space large size to be bent round steel pipe multiplexing
Sequence accumulated error control method.
Background technique
Various bend pipe components are not only extensive in gas-liquid transport, machinery, chemical industry, nuclear power with the development of modern industry
Using using also more and more extensive in modern architecture industry, especially large span space curved tube steel construction is more and more
Be applied to monster fair shop, transport hub, Olympic Games sports ground etc..
Curvature of space round tube steel construction is in bending machining, using point-by-point close approximation method is segmented, in space circular arc
A space coordinates are chosen in part, in this space coordinates, space circular arc are carried out subsection synthesis, is simplified to approximation
The circular arc of plane is bent by the bending method of plane circular arc, then welds the one section one section circular arc pipe fitting assembly bent
It picks up and, complete the production of whole section of curvature of space steel pipe.The large span space bent pipe construction stage is more, operating condition is complicated, foozle
It is inevitable with stitching error, it eventually leads to space bent pipe and is difficult to accurately join the two sections of a bridge, etc.
The large span space bent pipe construction stage is more, and operating condition is complicated, and with equipment, material, personnel, method, measurement and environment
Related etc. a variety of influence error components, error is unavoidable.Curvature of space round tube steel construction, which finally splices, completes generation
Accumulated error can be represented by the formula, wherein since rebound etc. causes the manufacture rise and design of round steel pipe during bending pipes
The deviation of the deviation of rise, factory length and design length, is defined as foozle here, uses f1It indicates；Each section of round tube
It is connected by butt weld, is welded into an entirety, here the error caused by meeting by the influence of seam deformation and residual stress,
It is defined as assembled error, uses f2It indicates；fΔθIndicate error caused by the angle Δ θ of sectional bent pipe end face and center axis thereof；
felseIndicate the error that other factors generate；kn(n=1,2,3,4) indicates the respective weights factor.
F=k1f1+k2f2+k3fΔθ+k4felse
Two kinds are mainly taken for the error generated after bend pipe processing and manufacturing in space bent pipe fabrication processing at present
Control method: the first, it further increases the accuracy of manufacture of each sectional bent pipe in engineering and controls welding deformation.But bend pipe
The difficulty of one accuracy class of every increase when manufacture, processing can increase in geometry grade, and the requirement to process equipment and tool will
It is higher.Second, the method that the space bent pipe excessive to mismachining tolerance takes the mechanical correction and flame straightening after construction
To reach the error range of permission.But this will increase extra time cost and human cost, and will cause in pipe and generate
It is linear to influence space bent pipe for residual stress.
Summary of the invention
The purpose of the present invention is to provide a kind of space large sizes to be bent round steel pipe multi-process accumulated error control method, is not necessarily to
Bend pipe accuracy of manufacture grade is improved, the control suitable for large span, major diameter curvature of space round steel pipe processing accumulated error.
In order to achieve the above object of the invention, the step of the technical solution adopted by the present invention is as follows:
1) according to the requirement in national standard specification to end surfaces degree perpendicular to the axis, the angle of end surfaces and axis is defined
Δ θ is adjusting angle；
Go out an adjusting angle Δ θ in bending round steel pipe assembly plane machining, the spatial position of bend pipe to be assembled is adjusted
It is whole, so that accumulated error reduces and meets the requirement in national standard specification；
After processing adjusting angle Δ θ, next section of bend pipe to be assembled spatially shows as revolving around the assembled coordinate origin in part
Turn an adjusting angle Δ θ；
The adjusting angle Δ θ is around splicing planeAxis rotation, in national standard specification, it simultaneously can be aroundAxis
WithAxis rotation；
The rotation formula of space coordinate transformation are as follows:
In formula:To rotate angle in face around axis；To rotate angle in face around axis；To rotate angle in face around axis；
WhenWhen very little, coordinate transform simplified formula are as follows:
In formula, (x ", y ", z ")TFor the coordinate after practical assembly, (x ', y ', z ')TTo be adjusted the seat after angle and optimizing
Mark, Δ x, Δ y, Δ z are origin increment.
The ranging offset amount of the practical three-dimensional coordinate point after optimizing and design three-dimensional coordinate point will be adjusted as optimization
Target establishes the objective function of precision optimizing:
F=min { (x '-X)2+(y′-Y)2+(z′-Z)2}
Wherein: (X, Y, Z)TFor design point three-dimensional coordinate；The objective function constraint equation of precision optimizing is national standard rule
To the technical requirements of adjusting angle Δ θ in model, then:
In formula: d is bend pipe outer diameter；
In conjunction with above formula, for using at a distance from three-dimensional coordinate adjusted and design three-dimensional coordinate as objective function, to standardize
In requirement as constraint condition, establish the mathematical model of accumulated error optimization.
2) application space curved tube accumulated error control parameter detection system obtains each of space large size curved tube
The central axis point coordinate and the three-dimensional coordinates parameter such as end face and the relative position of central axis of section actual processing model.
It designs a model three-dimensional coordinate parameter in conjunction with space large size curved tube, with (X, Y, Z)TFor design point three-dimensional coordinate and
(x″,y″,z″)TBe it is practical assembled after two groups of parameters of coordinate be used as objective function, substitution curvature of space round tube accumulated error
The optimal solution of adjusting angle Δ θ is calculated in control mathematical model.
It is continuous to be unsatisfactory for G1 for space structure after adjusting angle Δ θ optimal solution value is excessive or adjustment, is guaranteeing large space knot
Structure integrally meets the upper of the basis of design requirement, and adjusting angle Δ θ is assigned in several bend pipe assembly planes and is adjusted, finally
Realize the purpose for decreasing or even eliminating accumulated error.
It is described to go out an adjusting angle Δ θ in assembled plane machining, an adjustment is gone out by gas flame cuttiug assembly plane machining
Angle Δ θ, is adjusted the spatial position of bend pipe to be assembled.
It is described to go out an adjusting angle Δ θ in assembled plane machining, by adjusting groove gap, cross section shape between pipeline section
Shape, to control the verticality Δ 1 and end surfaces and axis angle Δ θ of pipe fitting end face and axis, to realize to bend pipe to be assembled
Spatial position is adjusted, so that accumulated error reduces or even eliminates the purpose of accumulated error.
The national standard specification is according to " code for acceptance of construction quality of steel structures GB 50205-2001 " middle finger
Out, the verticality Δ 1 of pipe fitting end face and axis is recommended as within 3mm, is up within 5mm, i.e. end surfaces and axis angle Δ θ
Allow the deviation in prescribed limit, the angle Δ θ for defining end surfaces and axis is adjusting angle.
The invention has the advantages that:
1) accuracy of manufacture grade of every section of bend pipe is not limited excessively.
2) welding deformation is not controlled excessively.
3) as long as any two ends bend pipe splicing reaches in code requirement Discrepancy Control Area.
4) by compensating for mismachining tolerance mutually in assembly, processing technology difficulty is reduced, reduction is produced into
This.
5) by going out an adjusting angle in assembled plane machining, the spatial position of bend pipe to be assembled is adjusted.
If 6) it is continuous to be unsatisfactory for G1 for space structure after adjusting angle Δ θ optimal solution value is excessive or adjustment, guarantee it is large-scale empty
Between structure integrally meet design requirement basis it is upper, this control parameter is reasonably allocated in several bend pipe assembly planes and is carried out
Adjustment.
7) by adjusting groove gap, cross-sectional shape etc. between pipeline section, to control the verticality of pipe fitting end face and axis
Δ l and end surfaces and axis angle Δ θ, and then realize control error, operation difficulty is reduced, and remnants will not be generated in pipe and answered
It is linear not influence space bent pipe for power.
The present invention is suitable for the large spans, major diameter curvature of space such as monster fair shop, transport hub, Olympic Games sports ground
The control of round steel pipe processing accumulated error.
Detailed description of the invention
Fig. 1 is space large size bending round steel pipe structural schematic diagram.
Fig. 2 is space large size bending round steel pipe mismachining tolerance control schematic diagram.
Fig. 3 is the verticality Δ l and end surfaces and axis angle Δ θ schematic diagram of pipe fitting end face and axis.
Fig. 4 is global coordinate and splicing plane local coordinate system.
Specific embodiment
The present invention is described further with reference to the accompanying drawings and examples.
Curvature of space round steel pipe production method, sequentially includes the following steps:
First step setting-out: on the basis of computer modeling, from model intercept component true form, by computer into
Row setting-out individually takes out the component divided on computers, measures chord length and rise, as processing numerical value.Setting-out, which is examined, closes
After lattice, necessary angle, notch, production template and moulding bed template are made by technique requirement.
Second order bends forming: mechanical cold working or curved using intermediate frequency is carried out on particular manufacturing craft using large-sized hydraulic press
Pipe machine carries out hot worked processing method, by every section of bend pipe machine-shaping.
Third step segmentation is pre-assembled: the semi-finished product and part that preparation is completed are assembled into component or component by drawing regulation
(as shown in Figure 1).
A kind of the step of space large size bending round steel pipe multi-process accumulated error control method, this method, is as follows:
1) according to the requirement in national standard specification to end surfaces degree perpendicular to the axis, the angle of end surfaces and axis is defined
Δ θ is adjusting angle；
Go out an adjusting angle Δ θ in bending round steel pipe assembly plane machining, the spatial position of bend pipe to be assembled is adjusted
It is whole, so that accumulated error reduces and meets the requirement in national standard specification；
After processing adjusting angle Δ θ, next section of bend pipe to be assembled spatially shows as revolving around the assembled coordinate origin in part
Turn an adjusting angle Δ θ；
The adjusting angle Δ θ is around splicing planeAxis rotation, in national standard specification, it simultaneously can be aroundAxis
WithAxis rotates (as shown in Figure 4)；
The rotation formula of space coordinate transformation are as follows:
In formula:To rotate angle in face around axis；To rotate angle in face around axis；To rotate angle in face around axis；
WhenWhen very little, coordinate transform simplified formula are as follows:
In formula, (x ", y ", z ")TFor the coordinate after practical assembly, (x ', y ', z ')TTo be adjusted the seat after angle and optimizing
Mark, Δ x, Δ y, Δ z are origin increment.
The ranging offset amount of the practical three-dimensional coordinate point after optimizing and design three-dimensional coordinate point will be adjusted as optimization
Target establishes the objective function of precision optimizing:
F=min { (x '-X)2+(y′-Y)2+(z′-Z)2}
Wherein: (X, Y, Z)TFor design point three-dimensional coordinate；The objective function constraint equation of precision optimizing is national standard rule
To the technical requirements of adjusting angle Δ θ in model, then:
In formula: d is bend pipe outer diameter；
In conjunction with above formula, for using at a distance from three-dimensional coordinate adjusted and design three-dimensional coordinate as objective function, to standardize
In requirement as constraint condition, establish the mathematical model of accumulated error optimization.
2) application space curved tube accumulated error control parameter detection system obtains each of space large size curved tube
The central axis point coordinate and the three-dimensional coordinates parameter such as end face and the relative position of central axis of section actual processing model.
It designs a model three-dimensional coordinate parameter in conjunction with space large size curved tube, with (X, Y, Z)TFor design point three-dimensional coordinate and
(x″,y″,Z″)TBe it is practical assembled after two groups of parameters of coordinate be used as objective function, substitution curvature of space round tube accumulated error
The optimal solution of adjusting angle Δ θ is calculated in control mathematical model.
It is continuous to be unsatisfactory for G1 for space structure after adjusting angle Δ θ optimal solution value is excessive or adjustment, is guaranteeing large space knot
Structure integrally meets the upper of the basis of design requirement, and adjusting angle Δ θ is assigned in several bend pipe assembly planes to be adjusted final
Realize the purpose for decreasing or even eliminating accumulated error.
It is described to go out an adjusting angle Δ θ in assembled plane machining, an adjustment is gone out by gas flame cuttiug assembly plane machining
Angle Δ θ, is adjusted the spatial position of bend pipe to be assembled.
As shown in Fig. 2, described go out an adjusting angle in assembled plane machining, by adjusting groove gap, cross between pipeline section
Cross sectional shape, to control the verticality Δ 1 and end surfaces and axis angle Δ θ of pipe fitting end face and axis, to realize to be assembled
The spatial position of bend pipe is adjusted, so that accumulated error reduces or even eliminates the purpose of accumulated error.
As shown in figure 3, next section of bend pipe to be assembled is spatially shown as around the assembled coordinate system in part after processing adjusting angle
Origin rotates an adjusting angle.It is the ideal position of space bent pipe in Fig. 3 shown in dotted line so that two sections of space bent pipes splice as an example,
A1 is ideal splicing plane, and B1 is ideal space position；Solid line is real space bend pipe position, and A2 is that the method for the present invention is not used
Shown splicing plane, B2 are that position after real space bend pipe splicing of the invention is not used；A3 is to be processed using the method for the present invention
Plane is spliced in adjustment out, and Δ θ is adjusting angle, and B3 is using position after real space bend pipe splicing of the invention.So that error
Reduce, practical three-dimensional coordinate tends to ideal design coordinate after splicing.
The national standard specification is according to " code for acceptance of construction quality of steel structures GB 50205-2001 " middle finger
Out, the verticality Δ 1 of pipe fitting end face and axis is recommended as within 3mm, is up within 5mm, i.e. end surfaces and axis angle Δ θ
Allow the deviation in prescribed limit, the angle Δ θ for defining end surfaces and axis is adjusting angle.
Claims (5)
1. a kind of space large size is bent round steel pipe multi-process accumulated error control method, which is characterized in that the step of this method such as
Under:
1) according in national standard specification " code for acceptance of construction quality of steel structures GB 50205-2001 " to end surfaces and axis
The requirement of line verticality, the angle Δ θ for defining end surfaces and axis is adjusting angle；
Go out an adjusting angle Δ θ in bending round steel pipe assembly plane machining, the spatial position of bend pipe to be assembled is adjusted, is made
Accumulated error is obtained to reduce and meet the requirement in national standard specification；
After processing adjusting angle Δ θ, next section of bend pipe to be assembled is spatially shown as around the assembled coordinate origin rotation one in part
A adjusting angle Δ θ；
The adjusting angle Δ θ is around splicing planeAxis rotation, in national standard specification, it simultaneously can be aroundAxis andAxis
Rotation；
The rotation formula of space coordinate transformation are as follows:
In formula:For aroundAxis existsFace rotates angle；For aroundAxis existsFace rotates angle；For aroundAxis exists
Face rotates angle；
WhenWhen very little, coordinate transform simplified formula are as follows:
In formula, (x ", y ", z ")TFor the coordinate after practical assembly, (x ', y ', z ')TTo be adjusted the coordinate after angle and optimizing, Δ
X, Δ y, Δ z are origin increment；
Using the ranging offset amount for being adjusted the coordinate after angle and optimizing and design three-dimensional coordinate as optimization aim, it is excellent to establish precision
The objective function of change:
F=min { (x '-X)2+(y′-Y)2+(z′-Z)2}
Wherein: (X, Y, Z)TTo design three-dimensional coordinate；The objective function constraint equation of precision optimizing is to exchange in national standard specification
The technical requirements of whole angle Δ θ, then:
In formula: d is bend pipe outer diameter；
In conjunction with above formula, for adjust at a distance from coordinate and design three-dimensional coordinate after angle and optimizing as objective function, in standardizing
Requirement as constraint condition, establish the mathematical model of accumulated error optimization；
2) application space large size is bent round steel pipe accumulated error control parameter detection system, obtains space large size bending round steel pipe
The relative position three-dimensional coordinate parameter of the central axis point coordinate of each section of actual processing model and end face and central axis；
It designs a model three-dimensional coordinate parameter in conjunction with space large size curved tube, with (X, Y, Z)TFor design point three-dimensional coordinate and (x ",
y″,z″)TBe it is practical assembled after two groups of parameters of coordinate be used as objective function, substitute into curvature of space round tube accumulated error and control
The optimal solution of adjusting angle Δ θ is calculated in mathematical model.
2. a kind of space large size according to claim 1 is bent round steel pipe multi-process accumulated error control method, feature
Be: it is continuous to be unsatisfactory for G1 for space structure after adjusting angle Δ θ optimal solution value is excessive or adjustment, is guaranteeing that large space structure is whole
Body meets the upper of the basis of design requirement, and adjusting angle Δ θ is assigned in several bend pipe assembly planes and is adjusted.
3. a kind of space large size according to claim 1 is bent round steel pipe multi-process accumulated error control method, feature
It is, it is described to go out an adjusting angle Δ θ in assembled plane machining, an adjusting angle Δ is gone out by gas flame cuttiug assembly plane machining
θ is adjusted the spatial position of bend pipe to be assembled.
4. a kind of space large size according to claim 1 is bent round steel pipe multi-process accumulated error control method, feature
It is, it is described to go out an adjusting angle Δ θ in assembled plane machining, by adjusting groove gap, cross-sectional shape between pipeline section, come
Control the verticality Δ 1 and end surfaces and axis angle Δ θ of pipe fitting end face and axis.
5. a kind of space large size according to claim 1 is bent round steel pipe multi-process accumulated error control method, feature
It is: is pointed out in the national standard specification " code for acceptance of construction quality of steel structures GB 50205-2001 ", pipe fitting end face
Verticality Δ 1 with axis is within 5mm, i.e., end surfaces and axis angle Δ θ allow the deviation in prescribed limit, defines pipe end
The angle Δ θ of face and axis is adjusting angle.
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| CN107841932A (en) * | 2017-10-19 | 2018-03-27 | 中国建筑土木建设有限公司 | Bowstring arch bridge rib-lifting section makes and installation and locating method |
| CN109238157B (en) * | 2018-09-10 | 2020-04-10 | 耿佳钰 | Turntable radius and installation eccentric four-index coordinate increment detection method and detection device |
| CN112781490B (en) * | 2020-12-25 | 2022-04-01 | 南京工业大学 | Method for accurately measuring planar free bending forming dimension of pipe |
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| CN103383251A (en) * | 2012-05-04 | 2013-11-06 | 中国石油天然气股份有限公司 | Method for discharging by bending pipelines back and forth at any space angle |
| CN104088461A (en) * | 2014-07-18 | 2014-10-08 | 北京城建建设工程有限公司 | Y-type cast-in-place concrete column formwork system and construction method thereof |
| CN105604085A (en) * | 2016-03-03 | 2016-05-25 | 内蒙古鲁电蒙源电力工程有限公司 | Substation frame column footing foundation bolt and mounting method thereof |
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- 2016-07-28 CN CN201610613020.5A patent/CN106294940B/en not_active Expired - Fee Related
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| CN1587923A (en) * | 2004-08-17 | 2005-03-02 | 广东省基础工程公司 | Device and its method for monitoring river bed sedimentation in tunnel pass through river construction |
| CN201662546U (en) * | 2010-04-27 | 2010-12-01 | 丹东奥龙射线仪器有限公司 | X-ray steel tube welding seam detection probing arm device |
| CN103383251A (en) * | 2012-05-04 | 2013-11-06 | 中国石油天然气股份有限公司 | Method for discharging by bending pipelines back and forth at any space angle |
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