CN113523656B - Welding reversible deformation design method for structural part - Google Patents
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- 238000003466 welding Methods 0.000 title claims abstract description 142
- 230000002441 reversible effect Effects 0.000 title claims abstract description 99
- 238000000034 method Methods 0.000 title claims abstract description 89
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- 238000004088 simulation Methods 0.000 claims abstract description 13
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- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000000399 orthopedic effect Effects 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
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- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
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- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
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Abstract
The invention discloses a structural member welding reversible deformation design method, which comprises the steps of obtaining welding deformation of a structural member, wherein the welding deformation comprises deformation and a welding deformation position; building a CAE model of the structural member, wherein a cushion block and a clamp are arranged in the CAE model, and the positions of the cushion block and the clamp are determined according to the deformation and the welding deformation; determining the position and the number range of the cushion block based on the welding deformation position; determining the size range of the reverse deformation amount based on the deformation amount; determining the range of inverse deformation holding time; determining a plurality of groups of anti-deformation schemes by adopting an optimal Latin hypercube design method based on the position and number range of the cushion block, the size range of the anti-deformation amount and the anti-deformation retention time range; and substituting the inverse deformation schemes into a CAE model for welding simulation, predicting welding deformation corresponding to each inverse deformation scheme, and screening out the optimal inverse deformation scheme. The invention can effectively determine the welding reversible deformation amount and the reversible deformation position, reduce the welding deformation of the structural member and solve the problems of unstable reversible deformation process and poor effect.
Description
Technical Field
The invention belongs to the technical field of welding, and particularly relates to a structural part welding reversible deformation design method.
Background
The large key structural part is an important component of the whole engineering machinery, the structural part is mostly formed by welding high-strength steel, the nonuniformity of a temperature field in the welding process causes welding stress generated in the welded structural part to cause welding deformation due to the constraint of adjacent parts in the cooling process. The welding production process of the large-scale structural part is relatively high in randomness and relatively low in reproducibility, so that welding deformation is difficult to control, post-welding mechanical/flame straightening is often needed, a large amount of manpower and material resources are consumed, and even a scrapped risk exists. The quality, assembly precision and structural bearing capacity of a welded structure are seriously influenced by the welding deformation of the structural part. The welding deformation must be controlled by a suitable method.
At present, the published reports and documents about the prediction and optimization of the reverse deformation are few, and the relation between the reserved reverse deformation and the welding deformation of the structural member is researched only by experience, calculation formula derivation and field repeated tests, and finally, the reasonable reserved reverse deformation is determined. The invention discloses a welding reverse deformation forming method of a thin-plate large oil tank, which is disclosed in Chinese patent application with the publication number of CN103577650A and the name of the invention of the welding reverse deformation forming method of the thin-plate large oil tank. And calculating the deformation after welding according to known conditions by a formula, and designing the preset reverse deformation of the size of the oil tank before welding to obtain the actual production size of the oil tank. The method is to obtain the anti-deformation amount of the oil tank through formula deduction calculation, parameters need to be set through experience, errors exist, and the anti-deformation amount still needs to be adjusted and determined through field tests.
The invention discloses a method for calculating welding inverse deformation, which is disclosed in Chinese patent application with the publication number of CN108804725A and the invention name of the method for calculating the welding inverse deformation. And finally, determining the welding inverse deformation of the workpiece to be welded according to the preset inverse deformation, the welding angle deformation and the deformation target value. The method is to consider a modeling simulation welding process of the prefabricated anti-deformation butt joint aiming at the simple butt joint, compare an absolute value of the post-welding angular deformation with a deformation target value, continue to serve as a new prefabricated anti-deformation amount by using a difference value of the absolute value and the deformation target value, and repeatedly simulate until finally determining the final proper welding anti-deformation amount. The method only aims at simple butt joints, and is not suitable for inverse deformation calculation of large structural parts in complex structural forms.
The invention discloses a method and a device for calculating the welding inverse deformation amount of a shell, a storage medium and computer equipment in Chinese patent application with the publication number of CN111507028A and the invention name of the method and the device for calculating the welding inverse deformation amount of the shell. The setting of the inverse deformation amount is realized by setting a displacement constraint condition for the three-dimensional plate shell solid model, the inverse deformation amount is calculated by the flow channel diameter deformation ratio multiplied by the flow channel diameter, and the method is only limited to a specific structure and has no actual reference value.
U.S. patent application publication No. UN20130006542A1, entitled Method for controlling displacement of a material reducing a well process, discloses a Method for controlling welding deformation during a material welding process. The method comprises the steps of modeling in the material welding process, setting pre-deformation at corresponding positions in a model according to actual welding deformation positions and deformation to offset deformation generated by welding, and finally performing on-site welding trial production on materials.
In the Chinese document, "optimization analysis of welding deformation of side beam of frame" discloses that the simulation model is used as the basis, the formulated scheme of deformation is combined, multilayer optimization calculation is adopted, numerical simulation optimization is carried out on the deformation during welding of the side beam, and the optimization scheme can provide reliable basis for control of welding deformation, selection of welding process design, determination of reserved deformation and the like. However, the method has the problems of large data processing amount, time consumption and the like.
Disclosure of Invention
Aiming at the problems, the invention provides a structural member welding reverse deformation design method which can effectively determine the welding reverse deformation amount and the reverse deformation position, effectively reduce the structural member welding deformation and solve the problems of unstable reverse deformation process and poor effect; meanwhile, the mechanical orthopedic workload can be reduced, the working efficiency is improved, and the production cost is reduced.
In order to achieve the technical purpose and achieve the technical effects, the invention is realized by the following technical scheme:
a structural member welding reverse deformation design method comprises the following steps:
acquiring welding deformation of the structural part, including the deformation and a welding deformation position;
establishing a CAE model of a structural part, wherein a cushion block and a clamp are arranged in the CAE model, and the positions of the cushion block and the clamp are determined according to the deformation and the welding deformation;
determining the position and the number range of the cushion block based on the welding deformation position;
determining the size range of the reverse deformation amount based on the deformation amount;
determining the range of inverse deformation holding time;
determining a plurality of groups of anti-deformation schemes by adopting an optimal Latin hypercube design method based on the position and number range of the cushion blocks, the size range of the anti-deformation amount and the anti-deformation retention time range;
bringing a plurality of groups of anti-deformation schemes into the CAE model for welding simulation, predicting welding deformation corresponding to each anti-deformation scheme, and screening out an optimal anti-deformation scheme meeting welding deformation control requirements;
and trial-manufacturing the on-site sample according to the screened optimal reverse deformation scheme, measuring the deformation after welding, and verifying the deformation control effect.
Optionally, the positions of the spacer and the jig are determined by:
arranging a cushion block at a certain linear distance from the welding deformation position, simulating cushion block support in a contact mode, establishing a rigid plane at a position corresponding to the cushion block to simulate the cushion block, and setting touch contact between the cushion block and the workpiece;
the welding deformation position is a position in contact with the clamp, a node at a corresponding position is selected in the CAE model, the clamping position of the clamp is simulated in a node forced displacement mode, a forced displacement is given to the selected node, the value of the forced displacement is an inverse deformation, and the direction of the forced displacement is opposite to the deformation direction of the deformation.
Optionally, the clamp is a C-shaped clamp.
Optionally, the size range of the reverse deformation amount is determined by the following steps:
and continuously applying the reverse deformation based on the deformation amount, thereby determining the size range of the reverse deformation amount.
Optionally, the deformation amount is defined as a, and the applied reverse deformation amount is less than or equal to 2A.
Optionally, the inverse deformation holding time range is determined based on an actual heat dissipation condition.
Optionally, the inverse deformation retention time range is obtained by:
the anti-deformation holding time is set according to the actual heat dissipation working condition on the principle that the production rhythm is not influenced, the workpiece is completely cooled to the room temperature, and the internal stress of the structural member is balanced or not.
Optionally, the position and number range of the cushion blocks are determined by the following method:
setting the positions and the number of the cushion blocks according to the welding deformation positions and the specific structural form of the workpiece, setting the corresponding number of the cushion blocks according to the number of the positions with serious deformation exceeding the tolerance, and placing the cushion blocks at different linear distances from the preset key welding line to set the position range of the cushion blocks.
Optionally, several sets of inverse-deformation schemes are obtained by:
the method comprises the steps of taking the positions and the number of cushion blocks, the size of the reverse deformation amount and the reverse deformation retention time as factors, setting different levels for each factor, taking the maximum welding deformation amount of a structural member as a response index, using preset software, selecting an optimal Latin hypercube design method to carry out three-factor test design at different levels, and providing a design matrix, namely a series of simulation plans expressed by the factors at multiple levels, wherein each series is a group of reverse deformation schemes.
Optionally, the preset software is isight software.
Compared with the prior art, the invention has the beneficial effects that:
the invention can effectively determine the welding reverse deformation amount and the position of the reverse deformation, effectively reduce the welding deformation of the structural member and solve the problems of unstable reverse deformation process and poor effect; meanwhile, the mechanical orthopedic workload can be reduced, the working efficiency is improved, and the production cost is reduced.
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In order that the manner in which the present invention is more fully understood, a more particular description of the invention will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings, wherein:
FIG. 1 is a schematic flow chart illustrating a structural member welding reverse deformation design method according to an embodiment of the present application;
FIG. 2 illustrates a structural member CAE model of an embodiment of the present application in view of reverse deformation;
FIG. 3 illustrates heat source verification of an embodiment of the present application;
FIG. 4 is a schematic diagram illustrating the reverse deformation of the T-join elastic pre-bend according to one embodiment of the present invention;
fig. 5 shows a schematic diagram of setting the welding deformation parameters of the structural member according to the embodiment of the application.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and do not limit the scope of the invention.
The following detailed description of the principles of the invention is provided in connection with the accompanying drawings.
As shown in fig. 1, the invention provides a structural member welding reverse deformation design method, which comprises the following steps:
the method comprises the following steps of (1) obtaining the welding deformation of a structural part, wherein the welding deformation comprises deformation and a welding deformation position;
in one embodiment of the present invention, the welding deformation amount is obtained by:
respectively scanning the structural parts before and after welding by using a laser three-dimensional scanner, measuring the welding deformation of the structural parts, and obtaining the deformation amount and the welding deformation position of the structural parts;
step (2) establishing a CAE model of a structural part, wherein a cushion block and a clamp are arranged in the CAE model, and the positions of the cushion block and the clamp are determined according to the deformation and the welding deformation;
in an embodiment of the present invention, the main purpose of the step (2) is to establish a CAE model of the structural member considering the existing reverse deformation process, as shown in fig. 2, which specifically includes the following steps:
establishing a CAE model of a large structural member according to a preset welding condition;
firstly, the CAE model is preprocessed, and the preprocessing comprises the following steps: simplifying a geometric model and dividing meshes; next, model setting is performed, including: the method comprises the following steps of material attribute endowing, initial temperature condition, thermal-mechanical boundary condition and welding and cooling working condition setting, wherein when the mechanical boundary condition is set, the existing reverse deformation process is considered in a CAE model, and the reverse deformation process is implemented by matching a cushion block and a tool clamp. Arranging a cushion block at the position with a certain linear distance from the welding deformation position obtained in the step (1), simulating cushion block support in a contact mode, establishing a rigid plane at the corresponding position of the cushion block to simulate the cushion block, and setting touch contact between the cushion block and the workpiece. And (2) obtaining the welding deformation position quantity, namely the position which is in contact with the clamp, selecting a node at a corresponding position in a CAE model, simulating the clamping position of the C-shaped clamp in a node forced displacement mode, giving a forced displacement to the selected node, wherein the value is the reverse deformation quantity set in the existing reverse deformation process, and the direction is opposite to the deformation direction measured in the step (1), so that the setting of the reserved reverse deformation quantity is realized. Adjusting heat source parameters according to the field welding process to finish heat source checking, as shown in fig. 3; and (2) comparing the welding deformation trend of the welding deformation result obtained in the step (1) with the established CAE model simulation result, and verifying the rationality of the finite element model.
Step (3) determining the position and the number range of the cushion block based on the welding deformation position;
determining the size range of the reverse deformation amount based on the deformation amount;
determining the range of inverse deformation holding time;
in a specific implementation manner of the embodiment of the present invention, the steps (3) to (5) specifically include the following steps:
the welding deformation of the large structural member can be counteracted or reduced by adopting a mechanical method to force reverse deformation, the elastic pre-bending method is utilized, the cushion block and the tool fixture are matched to generate forced displacement, so that the workpiece is subjected to elastic pre-bending, specifically, referring to fig. 4, 1 in fig. 4 represents a welding seam, 2 represents a cushion block, 3 represents a workpiece, and an arrow represents fixture clamping, however, whether the position of the cushion block is reasonably arranged can influence the reverse deformation effect, the tool fixture is removed after welding, and as the elastic recovery of the plate, part of the elastic deformation disappears, welding deformation with different degrees still exists, and the reverse deformation effect is influenced, so that the determination of reasonable tool fixture clamping time, namely reverse deformation retention time is very important. Due to the nonlinearity of the material, the reserved reverse deformation amount is not linearly related to the welding deformation amount of the structural member, the relation between the reserved reverse deformation amount and the welding deformation amount of the structural member needs to be researched, and finally, the reasonable reserved reverse deformation amount is determined. The finally determined inverse deformation process parameters are as follows: the position of the cushion block, the size of the reverse deformation amount and the reverse deformation retention time. Setting the positions and the number of the cushion blocks according to the post-welding deformation position of the structural member measured in the step (1) in combination with the structural form of the workpiece, setting a corresponding number of cushion blocks according to the position of deformation out-of-tolerance, and placing the cushion blocks at different linear distances from the key welding line, so as to set the parameter level; according to the field deformation obtained in the step (1), continuously applying the reverse deformation of the existing deformation with the vertical fluctuation not more than 2 times (namely defining the deformation as A and the applied reverse deformation less than or equal to 2A) on the basis of the existing reverse deformation, and setting parameter levels; the production practice is combined, the reversible deformation holding time is set through the heat dissipation working condition, and the parameter level is set according to the principle that the production rhythm is not influenced, the workpiece is completely cooled to the room temperature, and the internal stress of the structural part is balanced or not.
Step (6) determining a plurality of groups of anti-deformation schemes by adopting an optimal Latin hypercube design method based on the position and number range of the cushion blocks, the size range of the anti-deformation amount and the anti-deformation retention time range;
in one embodiment of the invention, several sets of counter-deformation schemes are obtained by:
the method comprises the steps of taking the positions and the number of cushion blocks, the size of the reverse deformation amount and the reverse deformation retention time as factors, setting different levels for each factor, taking the maximum welding deformation amount of a structural member as a response index, using preset software, selecting an optimal Latin hypercube design method to carry out three-factor test design at different levels, and providing a design matrix, namely a series of simulation plans expressed by the factors at multiple levels, wherein each series is a group of reverse deformation schemes. In a specific implementation process, the preset software is isight software.
And (7) bringing a plurality of groups of anti-deformation schemes into the CAE model for welding simulation, predicting the welding deformation amount corresponding to each anti-deformation scheme, and screening out the optimal anti-deformation scheme meeting the welding deformation control requirement.
And (8) trial-manufacturing the on-site sample based on the optimal reverse deformation scheme in the step (7), placing the welded workpiece for a specified reverse deformation amount holding time, removing the tool constraint, measuring the deformation after welding by using the means in the step (1), and verifying the deformation control effect.
In conclusion, the welding anti-deformation method disclosed by the invention equivalently simulates the welding anti-deformation by adopting the fixed constraint and contact constraint methods, solves the problem that the anti-deformation position and the anti-deformation amount are difficult to determine in the actual production through the design of the anti-deformation method, reduces the test amount, shortens the process research and development period and realizes the effective control of the deformation of the large structural member.
The design method of the present invention is described in detail with reference to fig. 2.
S1, measuring deformation of large structural part after welding
Scanning the base plate component sample pieces before and after welding by using a laser three-dimensional scanner respectively to obtain measurement data point clouds, and processing and modeling through fitting software to obtain the overall deformation trend of the base plate component and the deformation of key positions.
And S2, establishing a finite element model considering the existing inverse deformation process.
The finite element analysis pretreatment mainly works in geometric simplification and meshing. Before the mesh division, a geometric model needs to be simplified, unimportant functional components are deleted, and engineering characteristics such as holes, chamfers and fillets which are not easy to divide the mesh are simplified. And after the model is simplified, hexahedral meshes are performed on the model, transition processing is performed on the finite element modeling mesh of the large structural member in order to effectively control the number of the meshes, the positions of a heat affected zone and a welding seam are both encrypted meshes, and transition meshes are adopted at positions beyond 2 times of the distance of a welding toe, and the number of transition times is analyzed according to different plate thicknesses. And fillet welds are adopted for filling the large bottom plate and the vertical plate on the large bottom plate. According to the processing mode, three-dimensional solid modeling and grid division are carried out on the rotary table assembly, the grid size of a welding line and a heat affected zone area is controlled to be 2mm multiplied by 5mm, and the contact positions of the vertical plate and the large bottom plate and the ring plate and the large bottom plate are processed by the worker nodes. And finally, the total unit number of the entity model of the whole structural part is controlled within 20 ten thousand, and the unit types are set to be Solid70/Solid185 units, so that the requirement of welding thermal coupling analysis is met. And selecting high-strength steel Q550D as a material for parameter setting.
When mechanical boundary conditions are set, the existing inverse deformation process is considered in a CAE model, cushion block support is simulated in a contact mode, a rigid plane is established at the corresponding position of the cushion block to simulate the cushion block, and touch contact setting is adopted between the cushion block and a workpiece. And selecting a position in contact with the clamp, simulating the clamping position of the C-shaped clamp by adopting a mode of forcing Y-direction displacement by using a node, and setting a reserved reverse deformation amount. The method comprises the steps of adjusting parameters of a double-ellipsoid heat source according to an on-site welding process to finish heat source checking, setting a boundary condition of air heat convection preheating radiation, and simulating a welding process by adopting a 'life-dead unit technology'. And comparing the welding deformation trend of the large baseplate component measured in the S1 with the simulation result to verify the rationality of the finite element model.
And S3, selecting and realizing the inverse deformation parameters.
The structural form of the bottom plate assembly can be seen that vertical plates with different sizes are distributed on one side of the large bottom plate, the adopted fillet welds are used for connection, larger heat input can cause different degrees of angular deformation, and the reversible deformation is realized by matching with the cushion block and the fixture to force a displacement form. Determining an inverse deformation process, wherein main parameters are as follows: the position of the cushion block, the size of the reverse deformation amount and the reverse deformation retention time. Setting the positions and the number of cushion blocks according to the deformation position of the welded structural member measured in the step S1 and in combination with the structural form of the workpiece, wherein the four cushion blocks are named as dk _1, dk _2, dk _3 and dk _4 respectively, and are arranged at three levels with adjustable distances from the inner side edge of the weight reducing plate to d =30, 60 and 90 mm; according to the welding deformation P1=6, P2=5, P3=5, P4=5, P5=5 and P6=7mm of the field large bottom plate obtained in the step 1, the reverse deformation is continuously applied on the basis of the existing reverse deformation, and six levels of 5, 6, 7, 8, 9 and 10mm are set. And (3) setting the reverse deformation retention time by combining production practice and setting t to be 0.5h, 1h and 1.5h at three levels according to the heat dissipation working condition. A schematic diagram of the cushion block, the reversible deformation position and the deformation amount is shown in fig. 5.
And S4, designing a DOE (deformation-free) scheme.
And designing DOE according to an inverse deformation scheme. According to the three process parameters determined in the S3, three-factor test design with different levels is carried out, an optimal Latin hypercube design method which can design space filling type and research more level combinations with less test times (level number) is selected, the anti-deformation scheme DOE design is carried out, and 60 schemes are made as shown in the table 1.
TABLE 1
(1) Cushion block: dk _1, dk _2, dk _3, dk _4, units/mm; (2) and (3) reverse deformation retention time: t, unit/h; (3) c-shaped clamp clamping or reversible deformation position: p1, P2, P3, P4, P5, P6, units/mm.
And S5, performing inverse deformation prediction.
And (3) implementing the scheme designed in the step 4 by using the effective finite element model determined in the step 2, and performing simulation prediction on the welding deformation of the bottom plate assembly by using the deformation of the large bottom plate as an index and using large-scale general CAE software. The calculated value of the welding deformation is compared with the maximum value of the target value of the deformation, namely 3mm, and the optimal reverse deformation process scheme meeting the welding deformation control requirement is determined and shown in the table 2.
TABLE 2
And S6, verifying an optimization effect test.
And (3) trial-manufacturing the on-site sample based on the optimal reverse deformation process scheme obtained in the step S5, placing the welded workpiece for a specified reverse deformation holding time, dismantling the tool constraint, and then performing the post-welding deformation measurement by using the means S1, wherein the deformation of the large bottom plate is reduced from 5-7mm to less than 2.5mm, the target value is reached, and the effect is obvious.
The foregoing shows and describes the general principles and features of the present invention, together with the advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (10)
1. A structural member welding reverse deformation design method is characterized by comprising the following steps:
acquiring welding deformation of the structural part, including the deformation and a welding deformation position;
establishing a CAE model of a structural part, wherein a cushion block and a clamp are arranged in the CAE model, and the positions of the cushion block and the clamp are determined according to the deformation and the welding deformation;
determining the position and the number range of the cushion block based on the welding deformation position;
determining the size range of the reverse deformation amount based on the deformation amount;
determining the range of inverse deformation holding time;
determining a plurality of groups of anti-deformation schemes by adopting an optimal Latin hypercube design method based on the position and number range of the cushion blocks, the size range of the anti-deformation amount and the anti-deformation retention time range;
and bringing a plurality of groups of anti-deformation schemes into the CAE model for welding simulation, and predicting the welding deformation amount corresponding to each anti-deformation scheme, thereby screening out the optimal anti-deformation scheme meeting the welding deformation control requirement.
2. The method for designing the welding reverse deformation of the structural member according to claim 1, wherein the positions of the cushion block and the clamp are determined by the following method:
arranging a cushion block at a certain linear distance from the welding deformation position, simulating cushion block support in a contact mode, establishing a rigid plane at a position corresponding to the cushion block to simulate the cushion block, and setting touch contact between the cushion block and the workpiece;
the welding deformation position is a position in contact with the clamp, a node of the corresponding position is selected in the CAE model, the clamping position of the clamp is simulated in a node forced displacement mode, a forced displacement is given to the selected node, the value of the forced displacement is the reverse deformation, and the direction of the forced displacement is opposite to the deformation direction of the deformation.
3. The structural member welding reverse deformation design method according to claim 2, wherein the clamp is a C-shaped clamp.
4. The structural member welding reverse deformation design method according to claim 1, wherein the structural member welding reverse deformation design method comprises the following steps: the size range of the reverse deformation amount is determined and obtained through the following steps:
and continuously applying the reverse deformation based on the deformation amount, thereby determining the size range of the reverse deformation amount.
5. The structural member welding reverse deformation design method according to claim 4, wherein the structural member welding reverse deformation design method comprises the following steps: the deformation is defined as A, and the applied reverse deformation is less than or equal to 2A.
6. The structural member welding reverse deformation design method according to claim 1, wherein the structural member welding reverse deformation design method comprises the following steps: the range of the inverse deformation holding time is determined and obtained based on the actual heat dissipation working condition.
7. The structural member welding reverse deformation design method according to claim 6, wherein the structural member welding reverse deformation design method comprises the following steps: the reverse deformation retention time range is obtained by the following method:
the anti-deformation holding time is set according to the actual heat dissipation working condition on the principle that the production rhythm is not influenced, the workpiece is completely cooled to the room temperature, and the internal stress of the structural member is balanced or not.
8. The structural member welding reverse deformation design method according to claim 1, wherein the structural member welding reverse deformation design method comprises the following steps: the position and number range of the cushion blocks are determined by the following method:
setting the positions and the number of the cushion blocks according to the welding deformation positions and the specific structural form of the workpiece, setting the corresponding number of the cushion blocks according to the number of the positions with serious deformation exceeding the tolerance, and placing the cushion blocks at different linear distances from the preset key welding line to set the position range of the cushion blocks.
9. The structural member welding reverse deformation design method according to claim 1, wherein the structural member welding reverse deformation design method comprises the following steps: several sets of inverse deformation schemes are obtained by the following methods:
the method comprises the steps of taking the positions and the number of cushion blocks, the size of the reverse deformation amount and the reverse deformation retention time as factors, setting different levels for each factor, taking the maximum welding deformation amount of a structural member as a response index, using preset software, selecting an optimal Latin hypercube design method to carry out three-factor test design at different levels, and providing a design matrix, namely a series of simulation plans expressed by the factors at multiple levels, wherein each series is a group of reverse deformation schemes.
10. The structural member welding reverse deformation design method according to claim 9, wherein: the preset software is isight software.
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| CN114918600A (en) * | 2022-03-29 | 2022-08-19 | 黑龙江省龙建龙桥钢结构有限公司 | Anti-deformation bed-jig of steel box girder bridge panel outer welding intelligence system |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101445863A (en) * | 2008-12-20 | 2009-06-03 | 太原钢铁(集团)有限公司 | Method for reducing unevenness of composite stainless steel plates in manufacturing composite steel plates |
| CN102489915A (en) * | 2011-11-25 | 2012-06-13 | 长春轨道客车股份有限公司 | Manufacturing method of anti-deformation arc-shaped positioning copper strips for stainless steel car roof skeleton |
| CN107030357A (en) * | 2017-04-18 | 2017-08-11 | 大明重工有限公司 | A kind of adjust automatically Plasma Welding frock |
| CN107330181A (en) * | 2017-06-28 | 2017-11-07 | 上海交通大学 | Predict the implementation method of laser welding deflection |
| CN110396590A (en) * | 2019-08-29 | 2019-11-01 | 中国石油大学(华东) | Large pressurized vessel case heat treating method |
| CN110955968A (en) * | 2019-11-26 | 2020-04-03 | 江西江铃集团新能源汽车有限公司 | Method and system for compensating welding deformation of automobile bent section |
| AU2020103879A4 (en) * | 2020-12-03 | 2021-02-11 | Zhimin Li | method for predicting welding deformation of key control points of EMU train body |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105599185B (en) * | 2016-03-11 | 2018-06-29 | 武汉华星光电技术有限公司 | A kind of manufacturing method of light-conducting board mold |
-
2021
- 2021-07-05 CN CN202110756369.5A patent/CN113523656B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101445863A (en) * | 2008-12-20 | 2009-06-03 | 太原钢铁(集团)有限公司 | Method for reducing unevenness of composite stainless steel plates in manufacturing composite steel plates |
| CN102489915A (en) * | 2011-11-25 | 2012-06-13 | 长春轨道客车股份有限公司 | Manufacturing method of anti-deformation arc-shaped positioning copper strips for stainless steel car roof skeleton |
| CN107030357A (en) * | 2017-04-18 | 2017-08-11 | 大明重工有限公司 | A kind of adjust automatically Plasma Welding frock |
| CN107330181A (en) * | 2017-06-28 | 2017-11-07 | 上海交通大学 | Predict the implementation method of laser welding deflection |
| CN110396590A (en) * | 2019-08-29 | 2019-11-01 | 中国石油大学(华东) | Large pressurized vessel case heat treating method |
| CN110955968A (en) * | 2019-11-26 | 2020-04-03 | 江西江铃集团新能源汽车有限公司 | Method and system for compensating welding deformation of automobile bent section |
| AU2020103879A4 (en) * | 2020-12-03 | 2021-02-11 | Zhimin Li | method for predicting welding deformation of key control points of EMU train body |
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