CN112329164A - Modeling method, device and equipment for square tube beam rebound curvature and storage medium - Google Patents
Modeling method, device and equipment for square tube beam rebound curvature and storage medium Download PDFInfo
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Abstract
The invention provides a modeling method, a device, equipment and a storage medium for square tube beam rebound curvature, wherein the method comprises the following steps: according to the bending process of the square pipe beam, establishing a square pipe beam load model; acquiring parameters of the square tube beam load model, and establishing a residual stress model and a residual bending moment model according to the parameters, wherein the parameters of the square tube beam load model comprise: the height of the square tube, the width of the square tube and the thickness of the square tube; the square tube beam rebound curvature model is generated according to the residual stress model and the residual bending moment model, the rebound condition of plastic processing can be intuitively reflected, the intuition is good, the efficiency and the precision are high, and accurate basis and reference are provided for the plastic processing.
Description
Technical Field
The invention relates to the field of mechanical modeling, in particular to a method, a device, equipment and a storage medium for modeling square tube beam rebound curvature.
Background
In the field of workpiece processing, a workpiece is subjected to plastic bending, and the rebound curvature of the bending is related to the final workpiece accuracy, so that the acquisition of a rebound curvature model is important before the plastic processing of the workpiece;
in the prior art, an experimental method is generally adopted, namely, a forming radius and a forming angle are measured according to a bending test, the relation between the bending radius and the forming radius, and the relation between the bending angle and the forming angle are determined, and accordingly, a mold and a process are designed.
In view of this, the present application is presented.
Disclosure of Invention
The invention discloses a modeling method, a device, equipment and a storage medium for square tube beam rebound curvature, which can intuitively reflect the rebound condition provided by plastic processing, have good intuition, high efficiency and high precision, and provide accurate basis and reference for the plastic processing.
The first embodiment of the invention provides a modeling method for square tube beam rebound curvature, which comprises the following steps:
according to the bending process of the square pipe beam, establishing a square pipe beam load model;
acquiring parameters of the square tube beam load model, and establishing a residual stress model and a residual bending moment model according to the parameters, wherein the parameters of the square tube beam load model comprise: the height of the square tube, the width of the square tube and the thickness of the square tube;
and generating a square tube beam rebound curvature model according to the residual stress model and the residual bending moment model.
Preferably, the residual stress model is:
he＝ρ·σs/E；
where Δ k is the rebound curvature, σsIs the material yield strength, E is the elastic modulus, σrFor residual stress, y is the ordinate of the coordinate system established by the center of the square tubular beam, and h is the square tubeThe beam height, he is the elastic core height, and the bending radius of the rho square tube beam at the bending section.
Preferably, the residual bending moment model is:
Mr＝0；
wherein M isrResidual bending moment, t is the thickness of the square tube.
Preferably, the square tubular beam rebound curvature model is:
the second embodiment of the present invention provides a modeling apparatus for square tubular beam rebound curvature, including:
the square pipe beam load model building unit is used for building a square pipe beam load model according to the bending process of the square pipe beam;
the middle model establishing unit is used for acquiring parameters of the square tube beam load model, and establishing a residual stress model and a residual bending moment model according to the parameters, wherein the parameters of the square tube beam load model comprise: the height of the square tube, the width of the square tube and the thickness of the square tube;
and the square pipe beam rebound curvature model generation model is used for generating a square pipe beam rebound curvature model according to the residual stress model and the residual bending moment model.
Preferably, the residual stress model is:
he＝ρ·σs/E；
where Δ k is the rebound curvature, σsIs the material yield strength, E is the elastic modulus, σrFor residual stress, y is the ordinate of a coordinate system established by the center of the square tubular beam, and h isThe height of the square pipe beam, he is the height of the elastic core, and the bending radius of the rho square pipe beam at the bending section is obtained.
Preferably, the residual bending moment model is:
Mr＝0；
wherein M isrResidual bending moment, t is the thickness of the square tube.
Preferably, the square tubular beam rebound curvature model is:
a third embodiment of the present invention provides a storage medium, which stores a computer program, where the computer program can be executed by a processor of a device on which the storage medium is located, so as to implement the method for modeling the square tubular beam rebound curvature described in any one of the above.
The fourth embodiment of the invention provides a modeling device for square tubular beam rebound curvature, which comprises a processor, a memory and a computer program stored in the memory and configured to be executed by the processor, wherein the processor executes the computer program to realize the modeling method for square tubular beam rebound curvature.
Based on the modeling method, the modeling device, the modeling equipment and the storage medium for the square tube beam rebound curvature, the square tube beam load model is established firstly, then the parameters of the square tube beam load model are obtained, the residual stress model and the residual bending moment model are established according to the obtained parameters, and finally the square tube beam rebound curvature model is generated according to the residual stress model and the residual bending moment model, so that the rebound condition provided by plastic processing can be intuitively reflected, the intuition is good, the efficiency and the precision are high, and accurate basis and reference are provided for the plastic processing.
Drawings
Fig. 1 is a schematic flow chart of a modeling method for the rebound curvature of a square tubular beam according to a first embodiment of the present invention;
FIG. 2 is a model diagram of an equi-arc bending load of a square tubular beam provided by the present invention;
FIG. 3 is a schematic cross-sectional view of a square tubular beam according to the present invention;
fig. 4 is a schematic structural diagram of a modeling apparatus for square tubular beam rebound curvature according to a second embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
For better understanding of the technical solutions of the present invention, the following detailed descriptions of the embodiments of the present invention are provided with reference to the accompanying drawings.
It should be understood that the described embodiments are only some embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the examples of the present invention and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It should be understood that the term "and/or" as used herein is merely one type of association that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
The word "if" as used herein may be interpreted as "at … …" or "when … …" or "in response to a determination" or "in response to a detection", depending on the context. Similarly, the phrases "if determined" or "if detected (a stated condition or event)" may be interpreted as "when determined" or "in response to a determination" or "when detected (a stated condition or event)" or "in response to a detection (a stated condition or event)", depending on the context.
In the embodiments, the references to "first \ second" are merely to distinguish similar objects and do not represent a specific ordering for the objects, and it is to be understood that "first \ second" may be interchanged with a specific order or sequence, where permitted. It should be understood that "first \ second" distinct objects may be interchanged under appropriate circumstances such that the embodiments described herein may be practiced in sequences other than those illustrated or described herein.
The following detailed description of specific embodiments of the invention refers to the accompanying drawings.
The invention discloses a modeling method, a device, equipment and a storage medium for square tube beam rebound curvature, which can intuitively reflect the rebound situation of plastic processing, have good intuition, high efficiency and high precision, and provide accurate basis and reference for the plastic processing.
Referring to fig. 1, a first embodiment of the present invention provides a method for modeling a square tubular beam rebound curvature, which can be performed by a modeling apparatus for square tubular beam rebound curvature (hereinafter referred to as a modeling apparatus), and in particular, by one or more processors in the modeling apparatus, so as to implement the following steps:
s101, establishing a square pipe beam load model according to the bending process of the square pipe beam;
in this embodiment, the modeling device may be a user terminal (e.g., a computer, a tablet computer, or other intelligent devices), and particularly, data for establishing a square tube beam rebound curvature model may be stored in the modeling device, so as to obtain the rebound curvature according to a bending process of the square tube beam.
In the embodiment of the invention, a square tubular beam load model can be established according to the technological process of bending the square tubular beam, and the model schematic diagram can be shown in fig. 2.
In fig. 2, the bending punch 3 applies a bending force downward by being pushed by a hydraulic jack 4. The square tubular beam 5 is bent under the action of the bending male die 3 and the supporting roller 2. The supporting rollers 2 and the hydraulic jacks 4 are arranged on the frame 1, wherein F is bending force (N), F1 and F2 are supporting force (N), V1 is the moving speed (mm/time) of the punch, and V2 is the feeding speed (mm/time).
In fig. 3, xy is set up as a coordinate system with the midpoint of the cross section of the square tube beam, h is the height (mm) of the square tube, b is the width (mm) of the square tube, and t is the thickness (mm) of the square tube.
S102, obtaining parameters of the square tube beam load model, and establishing a residual stress model and a residual bending moment model according to the parameters, wherein the parameters of the square tube beam load model comprise: the height h of the square tube, the width b of the square tube and the thickness t of the square tube;
in this embodiment, a residual stress model may be established according to the theory of plastic mechanics, where the residual stress is equal to the bending stress minus the springback stress, and the residual stress model is:
where Δ k is the rebound curvature, σsIs the material yield strength, E is the elastic modulus, σrAnd the residual stress is y is a vertical coordinate of a coordinate system established by the center of the square tubular beam, and h is the height of the square tubular beam.
In this embodiment, according to a calculation method of residual static moment after bending and rebounding in the theories of plastic mechanics, elastic mechanics and material mechanics and a boundary condition that the residual static moment is zero, a square-tube beam residual bending moment model is established as in equations (2) and (3) as follows:
Mr＝0； (3)
wherein M isrResidual bending moment, t is the thickness of the square tube.
In this embodiment, according to the theory of plastic mechanics, the height model of the elastic core on the bending section of the square tube beam without entering the plastic state is as follows:
he＝ρ·σs/E (4)
wherein he is the height of the elastic core, and the bending radius of the rho square tube beam at the bending section is shown.
And S103, generating a square tube beam rebound curvature model according to the residual stress model and the residual bending moment model.
In this embodiment, according to mathematics and a plastic mechanics theory, a residual stress model, a square tube beam residual bending moment model, and an elastic core height model in a plastic state are combined to obtain a square tube beam rebound curvature model, which is as follows (5):
the following practical example is used to illustrate the application of the present invention in the fields of mechanical design and plastic process simulation.
The following table shows the calculation scheme and the result of the bending rebound curvature of the square tube beam.
In summary, according to the modeling method for square tube beam rebound curvature provided by the embodiment of the invention, the square tube beam load model is established first, then the parameters of the square tube beam load model are obtained, the residual stress model and the residual bending moment model are established according to the obtained parameters, and finally the square tube beam rebound curvature model is generated according to the residual stress model and the residual bending moment model, so that the rebound condition provided by plastic processing can be intuitively reflected, the intuition is good, the efficiency and the precision are high, and accurate basis and reference are provided for the plastic processing.
Referring to fig. 4, a second embodiment of the present invention provides a modeling apparatus for square tubular beam rebound curvature, including:
the square pipe beam load model establishing unit 201 is used for establishing a square pipe beam load model according to the bending process of the square pipe beam;
the middle model establishing unit 202 is configured to obtain parameters of the square tube beam load model, and establish a residual stress model and a residual bending moment model according to the parameters, where the parameters of the square tube beam load model include: the height of the square tube, the width of the square tube and the thickness of the square tube;
and the square pipe beam rebound curvature model generation model 203 is used for generating a square pipe beam rebound curvature model according to the residual stress model and the residual bending moment model.
Preferably, the residual stress model is:
he＝ρ·σs/E；
where Δ k is the rebound curvature, σsIs the material yield strength, E is the elastic modulus, σrAnd the residual stress is y is a vertical coordinate of a coordinate system established by the center of the square tubular beam, h is the height of the square tubular beam, he is the height of the elastic core, and the bending radius of the rho square tubular beam at the bending section is obtained.
Preferably, the residual bending moment model is:
Mr＝0；
wherein M isrResidual bending moment, t is the thickness of the square tube.
Preferably, the square tubular beam rebound curvature model is:
a third embodiment of the present invention provides a storage medium, which stores a computer program, where the computer program can be executed by a processor of a device on which the storage medium is located, so as to implement the method for modeling the square tubular beam rebound curvature described in any one of the above.
The fourth embodiment of the invention provides a modeling device for square tubular beam rebound curvature, which comprises a processor, a memory and a computer program stored in the memory and configured to be executed by the processor, wherein the processor executes the computer program to realize the modeling method for square tubular beam rebound curvature.
Based on the modeling method, the modeling device, the modeling equipment and the storage medium for the square tube beam rebound curvature, the square tube beam load model is established firstly, then the parameters of the square tube beam load model are obtained, the residual stress model and the residual bending moment model are established according to the obtained parameters, and finally the square tube beam rebound curvature model is generated according to the residual stress model and the residual bending moment model, so that the rebound condition provided by plastic processing can be intuitively reflected, the intuition is good, the efficiency and the precision are high, and accurate basis and reference are provided for the plastic processing.
Illustratively, the computer programs described in the third and fourth embodiments of the present invention may be partitioned into one or more modules, which are stored in the memory and executed by the processor to implement the present invention. The one or more modules may be a series of computer program instruction segments capable of performing specific functions for describing the execution of the computer program in the modeling apparatus for implementing a square tubular beam rebound curvature. For example, the device described in the second embodiment of the present invention.
The Processor may be a Central Processing Unit (CPU), other general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic, discrete hardware components, etc. The general processor can be a microprocessor or the processor can be any conventional processor and the like, the processor is a control center of the modeling method of the square tubular beam rebound curvature, and various interfaces and lines are utilized to connect all parts of the modeling method for realizing the square tubular beam rebound curvature.
The memory may be used to store the computer program and/or module, and the processor may implement various functions of the modeling method of square tube beam rebound curvature by running or executing the computer program and/or module stored in the memory and calling data stored in the memory. The memory may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required by at least one function (such as a sound playing function, a text conversion function, etc.), and the like; the storage data area may store data (such as audio data, text message data, etc.) created according to the use of the cellular phone, etc. In addition, the memory may include high speed random access memory, and may also include non-volatile memory, such as a hard disk, a memory, a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card), at least one magnetic disk storage device, a Flash memory device, or other volatile solid state storage device.
Wherein the implemented module, if implemented in the form of a software functional unit and sold or used as a stand-alone product, can be stored in a computer readable storage medium. Based on such understanding, all or part of the flow of the method according to the embodiments of the present invention may also be implemented by a computer program, which may be stored in a computer-readable storage medium, and when the computer program is executed by a processor, the steps of the method embodiments may be implemented. Wherein the computer program comprises computer program code, which may be in the form of source code, object code, an executable file or some intermediate form, etc. The computer-readable medium may include: any entity or device capable of carrying the computer program code, recording medium, usb disk, removable hard disk, magnetic disk, optical disk, computer Memory, Read-Only Memory (ROM), Random Access Memory (RAM), electrical carrier wave signals, telecommunications signals, software distribution medium, and the like. It should be noted that the computer readable medium may contain content that is subject to appropriate increase or decrease as required by legislation and patent practice in jurisdictions, for example, in some jurisdictions, computer readable media does not include electrical carrier signals and telecommunications signals as is required by legislation and patent practice.
It should be noted that the above-described device embodiments are merely illustrative, where the units described as separate parts may or may not be physically separate, and the parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. In addition, in the drawings of the embodiment of the apparatus provided by the present invention, the connection relationship between the modules indicates that there is a communication connection between them, and may be specifically implemented as one or more communication buses or signal lines. One of ordinary skill in the art can understand and implement it without inventive effort.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. A modeling method for square tube beam rebound curvature is characterized by comprising the following steps:
according to the bending process of the square pipe beam, establishing a square pipe beam load model;
acquiring parameters of the square tube beam load model, and establishing a residual stress model and a residual bending moment model according to the parameters, wherein the parameters of the square tube beam load model comprise: the height of the square tube, the width of the square tube and the thickness of the square tube;
and generating a square tube beam rebound curvature model according to the residual stress model and the residual bending moment model.
2. The method for modeling the rebound curvature of a square tube beam according to claim 1, wherein the residual stress model is:
he＝ρ·σs/E；
where Δ k is the rebound curvature, σsIs the material yield strength, E is the elastic modulus, σrAnd the residual stress is y is a vertical coordinate of a coordinate system established by the center of the square tubular beam, h is the height of the square tubular beam, he is the height of the elastic core, and the bending radius of the rho square tubular beam at the bending section is obtained.
3. The method for modeling the rebound curvature of the square tube beam according to claim 2, wherein the residual bending moment model is:
Mr＝0；
wherein M isrResidual bending moment, t is the thickness of the square tube.
4. The method for modeling square tubular beam rebound curvature according to claim 3, wherein the square tubular beam rebound curvature model is:
5. the utility model provides a modeling device of square tubular beams rebound curvature which characterized in that includes:
the square pipe beam load model building unit is used for building a square pipe beam load model according to the bending process of the square pipe beam;
the middle model establishing unit is used for acquiring parameters of the square tube beam load model, and establishing a residual stress model and a residual bending moment model according to the parameters, wherein the parameters of the square tube beam load model comprise: the height of the square tube, the width of the square tube and the thickness of the square tube;
and the square pipe beam rebound curvature model generation model is used for generating a square pipe beam rebound curvature model according to the residual stress model and the residual bending moment model.
6. The modeling device for the square tube beam rebound curvature according to claim 5, wherein the residual stress model is:
he＝ρ·σs/E；
where Δ k is the rebound curvature, σsIs the material yield strength, E is the elastic modulus, σrAnd the residual stress is y is a vertical coordinate of a coordinate system established by the center of the square tubular beam, h is the height of the square tubular beam, he is the height of the elastic core, and the bending radius of the rho square tubular beam at the bending section is obtained.
7. The modeling device for the square tube beam rebound curvature of claim 6, wherein the residual bending moment model is:
Mr＝0；
wherein M isrResidual bending momentAnd t is the thickness of the square tube.
8. The modeling device for square tubular beam rebound curvature of claim 7, wherein the square tubular beam rebound curvature model is:
9. a storage medium storing a computer program executable by a processor of a device on which the storage medium is located to implement a method of modeling square tubular beam rebound curvature as claimed in any one of claims 1 to 4.
10. A square tube beam rebound curvature modeling apparatus comprising a processor, a memory, and a computer program stored in the memory and configured to be executed by the processor, the processor executing the computer program to implement a square tube beam rebound curvature modeling method according to any one of claims 1 to 4.
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