CN113176738B - Method and apparatus for controlling press formability - Google Patents
Method and apparatus for controlling press formability Download PDFInfo
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- CN113176738B CN113176738B CN202110317323.3A CN202110317323A CN113176738B CN 113176738 B CN113176738 B CN 113176738B CN 202110317323 A CN202110317323 A CN 202110317323A CN 113176738 B CN113176738 B CN 113176738B
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Abstract
The invention relates to the technical field of plate stamping, in particular to a method and a device for controlling stamping formability, which comprises the following steps: determining a limit plastic strain value of a target workpiece; establishing a stamping simulation model, and simulating the stamping process of the target workpiece according to the stamping simulation model to obtain a simulated workpiece; if the current plastic strain value of the simulation workpiece is larger than the limit plastic strain value, reducing the height of the draw bead to obtain the movement track of the draw bead based on the changed plastic strain value; if the current plastic strain value of the simulation workpiece is smaller than the limit plastic strain value, the height of the draw bead is increased, and the movement track of the draw bead based on the changed plastic strain value is obtained; detecting the formability of the simulation workpiece to obtain a detection result; if the preset qualified conditions are met, carrying out entity experiment and/or entity production on the target workpiece according to the motion track; and if the preset qualified conditions are not met, adjusting the limit plastic strain value. The invention improves the formability of the workpiece.
Description
Technical Field
The invention relates to the technical field of plate stamping, in particular to a method and a device for controlling stamping formability.
Background
In the sheet material stamping forming process, a plurality of forming defects such as excessive thinning, cracking, wrinkling, springback and the like exist. In order to avoid the stamping forming defects, the stamping process parameters and the geometric parameters of the die can be adjusted to improve the stamping forming defects, but the improvement effect is not obvious. Moreover, if the part is cracked and wrinkled simultaneously during the stamping process, the two molding defects cannot be improved simultaneously by adjusting the stamping process parameters and the geometric parameters of the die.
Disclosure of Invention
In view of the above problems, the present invention has been made to provide a method and apparatus for controlling press formability that overcomes or at least partially solves the above problems.
According to a first aspect of the present invention, there is provided a method of controlling press formability, the method comprising:
determining a limit plastic strain value of a target workpiece;
establishing a stamping simulation model, and simulating the stamping process of the target workpiece according to the stamping simulation model to obtain a simulated workpiece; judging whether the current plastic strain value of the simulation workpiece is larger than the limit plastic strain value or not in the simulation process; if the current plastic strain value of the simulation workpiece is larger than the limit plastic strain value, reducing the height of the draw bead until the plastic strain value of the simulation workpiece is equal to the limit plastic strain value, and obtaining the movement track of the draw bead based on the changed plastic strain value; if the current plastic strain value of the simulation workpiece is smaller than the limit plastic strain value, the height of the draw bead is increased until the plastic strain value of the simulation workpiece is equal to the limit plastic strain value, and the movement track of the draw bead based on the changed plastic strain value is obtained;
detecting the formability of the simulation workpiece to obtain a detection result;
if the detection result shows that the formability of the simulation workpiece meets a preset qualified condition, performing entity experiment and/or entity production on the target workpiece according to the motion track; and if the detection result shows that the formability of the simulation workpiece does not meet the preset qualified condition, adjusting the limit plastic strain value.
Preferably, the creating of the stamping simulation model includes:
and establishing the stamping simulation model based on the geometric shape, the material and the stamping control parameters of the target workpiece, wherein the parameters related to the height of the draw bead in the stamping simulation model are set to be variable.
Preferably, the detecting of the formability of the dummy workpiece includes:
and detecting at least one parameter of the maximum thinning rate, the thickness uniformity, the forming limit value and the rebound quantity of the simulation workpiece.
Preferably, the adjusting the limit plastic strain value includes:
if the maximum reduction rate exceeds the preset qualified maximum reduction rate, reducing the limit plastic strain value; if the maximum thinning rate is lower than the preset qualified maximum thinning rate, increasing the limit plastic strain value;
if the thickness uniformity exceeds the preset qualified thickness uniformity, increasing the limit plastic strain value; if the thickness uniformity is lower than the preset qualified thickness uniformity, reducing the limit plastic strain value;
if the forming limit value exceeds a preset qualified forming limit value, reducing the limit plastic strain value; if the forming limit value is lower than a preset qualified forming limit value, increasing the limit plastic strain value;
if the springback quantity exceeds the preset qualified springback quantity, increasing the limit plastic strain value; and if the springback quantity is lower than the preset qualified springback quantity, reducing the limit plastic strain value.
Preferably, the determining the limit plastic strain value of the target workpiece comprises:
determining a limit plastic strain value of the target workpiece based on the strength and elongation of the target workpiece.
Preferably, the reducing the height of the draw bead comprises: reducing the height of the draw bead step by step in a sectional manner;
the height of the drawing bead is increased, and the method comprises the following steps: and the height of the draw bead is increased step by step in a sectional manner.
According to a second aspect of the present invention, there is provided an apparatus for controlling press formability, the apparatus comprising:
the determining module is used for determining a limit plastic strain value of the target workpiece;
the establishing module is used for establishing a stamping simulation model and simulating the stamping process of the target workpiece according to the stamping simulation model to obtain a simulated workpiece; judging whether the current plastic strain value of the simulation workpiece is greater than the limit plastic strain value or not in the simulation process; if the current plastic strain value of the simulation workpiece is larger than the limit plastic strain value, reducing the height of the draw bead until the plastic strain value of the simulation workpiece is equal to the limit plastic strain value, and obtaining the movement track of the draw bead based on the changed plastic strain value; if the current plastic strain value of the simulation workpiece is smaller than the limit plastic strain value, the height of the draw bead is increased until the plastic strain value of the simulation workpiece is equal to the limit plastic strain value, and the movement track of the draw bead based on the changed plastic strain value is obtained;
the detection module is used for detecting the formability of the simulation workpiece to obtain a detection result;
the processing module is used for carrying out entity experiment and/or entity production on the target workpiece according to the motion track if the detection result shows that the formability of the simulation workpiece meets a preset qualified condition; and if the detection result shows that the formability of the simulation workpiece does not meet the preset qualified condition, adjusting the limit plastic strain value.
Preferably, the establishing module is specifically configured to:
and establishing the stamping simulation model based on the geometric shape, the material and the stamping control parameters of the target workpiece, wherein the parameters related to the height of the draw bead in the stamping simulation model are set to be variable.
According to a third aspect of the invention, the invention provides a computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the method steps of the first aspect as set forth above.
According to a fourth aspect of the present invention, there is provided a computer device comprising a memory including a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the method steps as described in the first aspect when executing the program.
In the method of controlling press formability of the present invention, first, a limit plastic strain value of a target workpiece is determined. Then, the process is carried out. And establishing a stamping simulation model, and simulating the stamping process of the target workpiece according to the stamping simulation model to obtain a simulated workpiece. In the simulation process, judging whether the current plastic strain value of the simulation workpiece is greater than the limit plastic strain value; if the current plastic strain value of the simulation workpiece is larger than the limit plastic strain value, reducing the height of the draw bead until the plastic strain value of the simulation workpiece is equal to the limit plastic strain value, and obtaining the movement track of the draw bead based on the changed plastic strain value; and if the current plastic strain value of the simulated workpiece is smaller than the limit plastic strain value, increasing the height of the draw bead until the plastic strain value of the simulated workpiece is equal to the limit plastic strain value, and obtaining the movement track of the draw bead based on the changed plastic strain value. Then, the formability of the simulated workpiece is detected to obtain a detection result. If the detection result shows that the formability of the simulation workpiece meets the preset qualified conditions, performing entity experiment and/or entity production on the target workpiece according to the motion track; and if the detection result shows that the formability of the simulation workpiece does not meet the preset qualified condition, adjusting the limit plastic strain value. According to the invention, the stamping simulation model is established firstly, then the formability of the simulation workpiece is adjusted in the manner of adjusting the height of the drawing bead in the stamping simulation model, finally, the drawing bead adjusting motion track which can enable the target workpiece to meet the preset qualified conditions is determined, and the motion track is utilized to carry out entity experiment and/or entity production on the target workpiece, so that the target workpiece meeting the preset qualified conditions can be ensured, the formability of the workpiece is improved, and the workpiece is prevented from generating punch forming defects.
The foregoing description is only an overview of the technical solutions of the present invention, and the embodiments of the present invention are described below in order to make the technical means of the present invention more clearly understood and to make the above and other objects, features, and advantages of the present invention more clearly understandable.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:
fig. 1 shows a flowchart of a method of controlling press formability in an embodiment of the present invention;
FIG. 2 is a block diagram showing an apparatus for controlling press formability according to the embodiment of the present invention;
fig. 3 shows a schematic structural diagram of a computer device in an embodiment of the present invention.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
A first embodiment of the present invention provides a method of controlling press formability for controlling formability of a target workpiece to improve formability and forming quality of the target workpiece.
As shown in fig. 1, a method of controlling press formability according to an embodiment of the present invention includes:
step 101: and determining a limit plastic strain value of the target workpiece.
Step 102: establishing a stamping simulation model, and simulating the stamping process of the target workpiece according to the stamping simulation model to obtain a simulated workpiece; judging whether the current plastic strain value of the simulation workpiece is greater than the limit plastic strain value or not in the simulation process; if the current plastic strain value of the simulation workpiece is larger than the limit plastic strain value, reducing the height of the draw bead until the plastic strain value of the simulation workpiece is equal to the limit plastic strain value, and obtaining the movement track of the draw bead based on the changed plastic strain value; and if the current plastic strain value of the simulated workpiece is smaller than the limit plastic strain value, increasing the height of the draw bead until the plastic strain value of the simulated workpiece is equal to the limit plastic strain value, and obtaining the movement track of the draw bead based on the changed plastic strain value.
Step 103: and (5) detecting the formability of the simulation workpiece to obtain a detection result.
Step 104: if the detection result shows that the formability of the simulation workpiece meets the preset qualified conditions, performing entity experiment and/or entity production on the target workpiece according to the motion track; and if the detection result shows that the formability of the simulation workpiece does not meet the preset qualified condition, adjusting the limit plastic strain value.
In step 101, if the selected limit plastic strain value is too small, the forming capability of the material is not fully utilized, wrinkling and instability may occur, and the rebound of the workpiece after forming may be severe. If the selected limit plastic strain value is too large, excessive thinning and even cracking may occur, resulting in the workpiece being unusable. To solve the above problems, the present invention determines the limit plastic strain value by: based on the strength and elongation of the target workpiece, a value of ultimate plastic strain of the target workpiece is determined. And determining the limit plastic strain value to be higher if the strength of the target workpiece is lower, and otherwise, determining the limit plastic strain value to be lower. The higher the elongation of the target workpiece, the higher the determined limit plastic strain value, and conversely, the lower the determined limit plastic strain value. For example, if the target workpiece is a high strength steel, the determined ultimate plastic strain value is 2%. If the target workpiece is made of mild steel, which has a reduced strength and an increased elongation compared to high-strength steel, the determined limit plastic strain value can be increased, for example to 2.2% or more. If the target workpiece is made of ultra-high strength steel, and the ultra-high strength steel has increased strength and decreased elongation relative to the high strength steel, the determined limit plastic strain value may be decreased, e.g., to 1.8% or less.
For step 102, the relevant parameters in the press simulation model are based on the geometry, material, and press control parameters of the target workpiece. Meanwhile, in the present invention, the parameters relating to the height of the draw bead in the press simulation model are set to be variable. The drawing bead is a structure which is arranged at the edge part of the die surface of the part stamping die and is used for increasing the plastic formability of the plate and inhibiting wrinkling. Too high a draw bead easily causes cracking, too low a draw bead easily causes wrinkling, and too low a draw bead easily causes a low degree of plastic deformation of the material. In the prior art, the height of the draw bead is fixed, while in the present invention, the height of the draw bead is adjusted in real time according to the limit plastic strain value. For a draw bead, it is possible to adjust the degree of plastic strain of the material. When the height of the draw bead is increased, the plastic strain degree of the material is increased, and when the height of the draw bead is reduced, the plastic strain value of the material is reduced.
Further, after the stamping simulation model is established, the stamping process is simulated by the stamping simulation model. And in the simulation process, judging whether the current plastic strain value of the material of the target workpiece is larger than the limit plastic strain value in real time. And if the current plastic strain value is larger than the limit plastic strain value, reducing the height of the draw bead until the plastic strain value is equal to the limit plastic strain value, and obtaining the movement track of the draw bead based on the changed plastic strain value. For example, the limit plastic strain value is 2%, the current height of the draw bead is 1 m, if the plastic strain value of the target workpiece at the first moment is 3%, the height of the draw bead is reduced to 0.8 m, and at this moment (i.e., the second moment), the plastic strain value of the target workpiece is 2.5%, the height of the draw bead is reduced to 0.7 m, and at this moment (i.e., the third moment), the plastic strain value of the target workpiece is 2%, and the operation is stopped. And recording the corresponding relation between the plastic strain value and the height of the draw bead in the adjusting process to form a motion track based on the plastic strain value. The motion trail reflects the rule that the height of the draw bead changes along with the change of the plastic strain value.
And otherwise, if the current plastic strain value is smaller than the limit plastic strain value, the height of the draw bead is increased until the plastic strain value is equal to the limit plastic strain value, and the movement track of the draw bead based on the changed plastic strain value is obtained. For example, the limit plastic strain value is 2%, the current height of the draw bead is 1 meter, if the plastic strain value of the target workpiece at the first time is 0.5%, the height of the draw bead is increased to 1.2 meters, at this time (i.e., the second time) the plastic strain value of the target workpiece is 1%, the height of the draw bead is increased to 1.3 meters, and at this time (i.e., the third time) the plastic strain value of the target workpiece is 2%, the operation is stopped. And recording the corresponding relation between the plastic strain value and the height of the draw bead in the adjusting process to form a motion track based on the plastic strain value. The motion trail reflects the rule that the height of the draw bead changes along with the change of the plastic strain value.
Further, for the height adjustment of the draw bead, the invention adopts a sectional type step-by-step adjustment mode. That is, reducing the height of the draw bead includes: and reducing the height of the draw bead step by step in a sectional manner, wherein the height of the draw bead is reduced by 0.5mm each time. Increasing the height of the draw bead, comprising: and the height of the draw bead is increased step by step in a sectional manner, wherein the height of the draw bead is increased by 0.5mm each time. The phenomenon of overshoot can be avoided through the sectional type step-by-step adjustment mode.
The invention ensures that the plastic strain value of the material flowing through the draw bead is stable and maintained at the limit plastic strain value by adjusting the height of the draw bead so as to ensure the forming uniformity of the material and improve the quality of workpieces. And adjusting the height of the draw bead to adjust the plastic strain value of the target workpiece to be equal to the limit plastic strain value to obtain the simulated workpiece. Further, step 103 is executed to detect the formability of the simulated workpiece, and the method specifically includes: and detecting at least one parameter of the maximum thinning rate, the thickness uniformity, the forming limit value and the rebound quantity of the simulation workpiece. And obtaining a detection result after the detection is finished.
Further, in step 104, if the detection result indicates that the formability of the simulated workpiece meets the preset qualified condition, the target workpiece is subjected to entity experiment and/or entity production according to the motion trajectory. And if the detection result shows that the formability of the simulated workpiece does not meet the preset qualified condition, adjusting the limit plastic strain value until the formability of the simulated workpiece meets the preset qualified condition.
For how the limit plastic strain value is adjusted, the method comprises the following steps:
if the maximum reduction rate exceeds the preset qualified maximum reduction rate, reducing the limit plastic strain value; if the maximum reduction rate is lower than the preset qualified maximum reduction rate, increasing a limit plastic strain value;
if the thickness uniformity exceeds the preset qualified thickness uniformity, increasing the limit plastic strain value; if the thickness uniformity is lower than the preset qualified thickness uniformity, reducing the limit plastic strain value;
if the forming limit value exceeds the preset qualified forming limit value, reducing the limit plastic strain value; if the forming limit value is lower than the preset qualified forming limit value, increasing the limit plastic strain value;
if the resilience exceeds the preset qualified resilience, increasing the limit plastic strain value; and if the resilience amount is lower than the preset qualified resilience amount, reducing the limit plastic strain value.
It should be noted that after the limit plastic strain value is adjusted, the process goes to step 102. And (3) simulating the obtained new limit plastic strain value again, detecting the formability of the simulated workpiece after the simulated workpiece is obtained, judging whether the formability of the simulated workpiece meets a preset qualified condition or not based on a detection result, if so, carrying out entity experiment and/or entity production on the target workpiece according to the motion track, and if not, readjusting the new limit plastic strain value.
In the process of stamping forming, the draw bead plays an important role, and the geometric parameters and height of the draw bead influence the occurrence of workpiece cracking and wrinkling. The adjustment of the draw beads is easier relative to the die and die face. The invention improves the formability and the thickness uniformity of the workpiece by adjusting the draw bead, and simultaneously inhibits the occurrence of the defects of cracking, rebounding and wrinkling. The invention takes the plastic strain value of the workpiece as the adjusting factor, so that the adjusting feedback directly acts on the formability of the workpiece, and the effect is obvious.
Based on the same inventive concept, a second embodiment of the present invention also provides an apparatus for controlling press formability, as shown in fig. 2, comprising:
a determining module 201, configured to determine a limit plastic strain value of a target workpiece;
the establishing module 202 is used for establishing a stamping simulation model, and simulating the stamping process of the target workpiece according to the stamping simulation model to obtain a simulated workpiece; judging whether the current plastic strain value of the simulation workpiece is greater than the limit plastic strain value or not in the simulation process; if the current plastic strain value of the simulation workpiece is larger than the limit plastic strain value, reducing the height of the draw bead until the plastic strain value of the simulation workpiece is equal to the limit plastic strain value, and obtaining the movement track of the draw bead based on the changed plastic strain value; if the current plastic strain value of the simulation workpiece is smaller than the limit plastic strain value, the height of the draw bead is increased until the plastic strain value of the simulation workpiece is equal to the limit plastic strain value, and the movement track of the draw bead based on the changed plastic strain value is obtained;
the detection module 203 is used for detecting the formability of the simulation workpiece to obtain a detection result;
the processing module 204 is configured to perform an entity experiment and/or entity production on the target workpiece according to the motion trajectory if the detection result indicates that the formability of the simulated workpiece meets a preset qualified condition; and if the detection result shows that the formability of the simulation workpiece does not meet the preset qualified condition, adjusting the limit plastic strain value.
Preferably, the establishing module 202 is specifically configured to:
and establishing the stamping simulation model based on the geometric shape, the material and the stamping control parameters of the target workpiece, wherein the parameters related to the height of the draw bead in the stamping simulation model are set to be variable.
Based on the same inventive concept, the third embodiment of the present invention further provides a computer-readable storage medium, on which a computer program is stored, which when executed by a processor implements the method steps described in the foregoing first embodiment.
Based on the same inventive concept, a computer apparatus is further provided in the fourth embodiment of the present invention, as shown in fig. 3, for convenience of description, only the parts related to the embodiment of the present invention are shown, and details of the specific technology are not disclosed, please refer to the method part of the embodiment of the present invention. The computer device may be any terminal device including a mobile phone, a tablet computer, a PDA (Personal Digital Assistant), a POS (Point of Sales), a vehicle-mounted computer, etc., taking the computer device as the mobile phone as an example:
fig. 3 is a block diagram illustrating a partial structure associated with a computer device provided by an embodiment of the present invention. Referring to fig. 3, the computer apparatus includes: a memory 31 and a processor 32. Those skilled in the art will appreciate that the computer device configuration illustrated in FIG. 3 does not constitute a limitation of the computer device, and may include more or fewer components than illustrated, or some components may be combined, or a different arrangement of components.
The following describes the components of the computer device in detail with reference to fig. 3:
the memory 31 may be used to store software programs and modules, and the processor 32 executes various functional applications and data processing by operating the software programs and modules stored in the memory 31. The memory 31 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, an image playing function, etc.), and the like; the storage data area may store data (such as audio data, a phonebook, etc.), and the like. Further, the memory 31 may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid state storage device.
The processor 32 is a control center of the computer device, and performs various functions and processes data by operating or executing software programs and/or modules stored in the memory 31 and calling data stored in the memory 31. Alternatively, processor 32 may include one or more processing units; preferably, the processor 32 may integrate an application processor, which primarily handles operating systems, user interfaces, applications, etc., and a modem processor, which primarily handles wireless communications.
In the embodiment of the present invention, the processor 32 included in the computer device may have the functions corresponding to any of the method steps in the foregoing first embodiment.
The algorithms and displays presented herein are not inherently related to any particular computer, virtual machine, or other apparatus. Various general purpose systems may also be used with the teachings herein. The required structure for constructing such a system will be apparent from the description above. Moreover, the present invention is not directed to any particular programming language. It is appreciated that a variety of programming languages may be used to implement the teachings of the present invention as described herein, and any descriptions of specific languages are provided above to disclose the best mode of the invention.
In the description provided herein, numerous specific details are set forth. It is understood, however, that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description.
Similarly, it should be appreciated that in the foregoing description of exemplary embodiments of the invention, various features of the invention are sometimes grouped together in a single embodiment, figure, or description thereof for the purpose of streamlining the disclosure and aiding in the understanding of one or more of the various inventive aspects. However, the disclosed method should not be interpreted as reflecting an intention that: that the invention as claimed requires more features than are expressly recited in each claim. Rather, as the following claims reflect, inventive aspects lie in less than all features of a single foregoing disclosed embodiment. Thus, the claims following the detailed description are hereby expressly incorporated into this detailed description, with each claim standing on its own as a separate embodiment of this invention.
Those skilled in the art will appreciate that the modules in the device in an embodiment may be adaptively changed and disposed in one or more devices different from the embodiment. The modules or units or components of the embodiments may be combined into one module or unit or component, and furthermore they may be divided into a plurality of sub-modules or sub-units or sub-components. All of the features disclosed in this specification (including any accompanying claims, abstract and drawings), and all of the processes or elements of any method or apparatus so disclosed, may be combined in any combination, except combinations where at least some of such features and/or processes or elements are mutually exclusive. Each feature disclosed in this specification (including any accompanying claims, abstract and drawings) may be replaced by alternative features serving the same, equivalent or similar purpose, unless expressly stated otherwise.
Furthermore, those skilled in the art will appreciate that while some embodiments described herein include some features included in other embodiments, rather than other features, combinations of features of different embodiments are meant to be within the scope of the invention and form different embodiments. For example, in the following claims, any of the claimed embodiments may be used in any combination.
The various component embodiments of the invention may be implemented in hardware, or in software modules running on one or more processors, or in a combination thereof. Those skilled in the art will appreciate that a microprocessor or Digital Signal Processor (DSP) may be used in practice to implement some or all of the functionality of some or all of the components in accordance with embodiments of the present invention. The present invention may also be embodied as apparatus or device programs (e.g., computer programs and computer program products) for performing a portion or all of the methods described herein. Such programs implementing the present invention may be stored on computer-readable media or may be in the form of one or more signals. Such a signal may be downloaded from an internet website or provided on a carrier signal or in any other form.
It should be noted that the above-mentioned embodiments illustrate rather than limit the invention, and that those skilled in the art will be able to design alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or steps not listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The invention may be implemented by means of hardware comprising several distinct elements, and by means of a suitably programmed computer. In the unit claims enumerating several means, several of these means may be embodied by one and the same item of hardware. The usage of the words first, second and third, etcetera do not indicate any ordering. These words may be interpreted as names.
Claims (10)
1. A method of controlling press formability, characterized in that the method comprises:
determining a limit plastic strain value of a target workpiece;
establishing a stamping simulation model, and simulating the stamping process of the target workpiece according to the stamping simulation model to obtain a simulated workpiece; judging whether the current plastic strain value of the simulation workpiece is greater than the limit plastic strain value or not in the simulation process; if the current plastic strain value of the simulation workpiece is larger than the limit plastic strain value, reducing the height of the draw bead until the plastic strain value of the simulation workpiece is equal to the limit plastic strain value, and obtaining the movement track of the draw bead based on the changed plastic strain value; if the current plastic strain value of the simulation workpiece is smaller than the limit plastic strain value, the height of the draw bead is increased until the plastic strain value of the simulation workpiece is equal to the limit plastic strain value, and the movement track of the draw bead based on the changed plastic strain value is obtained;
detecting the formability of the simulation workpiece to obtain a detection result;
if the detection result shows that the formability of the simulation workpiece meets a preset qualified condition, performing entity experiment and/or entity production on the target workpiece according to the motion track; and if the detection result shows that the formability of the simulation workpiece does not meet the preset qualified condition, adjusting the limit plastic strain value.
2. The method of claim 1, wherein the creating a stamping simulation model comprises:
and establishing the stamping simulation model based on the geometric shape, the material and the stamping control parameters of the target workpiece, wherein the parameters related to the height of the draw bead in the stamping simulation model are set to be variable.
3. The method of claim 1, wherein said detecting formability of said simulated workpiece comprises:
and detecting at least one parameter of the maximum thinning rate, the thickness uniformity, the forming limit value and the rebound quantity of the simulation workpiece.
4. The method of claim 3, wherein the adjusting the limit plastic strain value comprises:
if the maximum thinning rate exceeds the preset qualified maximum thinning rate, reducing the limit plastic strain value; if the maximum thinning rate is lower than the preset qualified maximum thinning rate, increasing the limit plastic strain value;
if the thickness uniformity exceeds the preset qualified thickness uniformity, increasing the limit plastic strain value; if the thickness uniformity is lower than the preset qualified thickness uniformity, reducing the limit plastic strain value;
if the forming limit value exceeds a preset qualified forming limit value, reducing the limit plastic strain value; if the forming limit value is lower than a preset qualified forming limit value, increasing the limit plastic strain value;
if the springback quantity exceeds the preset qualified springback quantity, increasing the limit plastic strain value; and if the springback quantity is lower than the preset qualified springback quantity, reducing the limit plastic strain value.
5. The method of claim 1, wherein determining a limit plastic strain value for the target workpiece comprises:
determining a limit plastic strain value of the target workpiece based on the strength and elongation of the target workpiece.
6. The method of claim 1, wherein reducing the height of the draw bead comprises: reducing the height of the draw bead step by step in a sectional manner;
the height of the drawing bead is increased, and the method comprises the following steps: and the height of the draw bead is increased step by step in a sectional manner.
7. An apparatus for controlling press formability, characterized by comprising:
the determining module is used for determining a limit plastic strain value of the target workpiece;
the establishing module is used for establishing a stamping simulation model and simulating the stamping process of the target workpiece according to the stamping simulation model to obtain a simulated workpiece; judging whether the current plastic strain value of the simulation workpiece is greater than the limit plastic strain value or not in the simulation process; if the current plastic strain value of the simulation workpiece is larger than the limit plastic strain value, reducing the height of the draw bead until the plastic strain value of the simulation workpiece is equal to the limit plastic strain value, and obtaining the movement track of the draw bead based on the changed plastic strain value; if the current plastic strain value of the simulation workpiece is smaller than the limit plastic strain value, the height of the draw bead is increased until the plastic strain value of the simulation workpiece is equal to the limit plastic strain value, and the movement track of the draw bead based on the changed plastic strain value is obtained;
the detection module is used for detecting the formability of the simulation workpiece to obtain a detection result;
the processing module is used for carrying out entity experiment and/or entity production on the target workpiece according to the motion track if the detection result shows that the formability of the simulation workpiece meets a preset qualified condition; and if the detection result shows that the formability of the simulation workpiece does not meet the preset qualified condition, adjusting the limit plastic strain value.
8. The apparatus of claim 6, wherein the establishing module is specifically configured to:
and establishing the stamping simulation model based on the geometric shape, the material and the stamping control parameters of the target workpiece, wherein the parameters related to the height of the draw bead in the stamping simulation model are set to be variable.
9. A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the method steps of any one of claims 1 to 6.
10. A computer device comprising a storage including a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the processor implements the method steps of any of claims 1-6 when executing the program.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10166070A (en) * | 1996-12-06 | 1998-06-23 | Mitsubishi Electric Corp | Press working simulation method |
| CN203804008U (en) * | 2014-04-26 | 2014-09-03 | 重庆数码模车身模具有限公司 | Movable draw bead |
| CN109284515A (en) * | 2017-07-21 | 2019-01-29 | 上海梅山钢铁股份有限公司 | Method is determined based on the light sheet material Plastic Forming limit of finite element method (fem) analysis |
| CN111896373A (en) * | 2020-06-30 | 2020-11-06 | 武汉上善仿真科技有限责任公司 | Test and calculation method for measuring equivalent plastic strain forming limit diagram |
-
2021
- 2021-03-23 CN CN202110317323.3A patent/CN113176738B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10166070A (en) * | 1996-12-06 | 1998-06-23 | Mitsubishi Electric Corp | Press working simulation method |
| CN203804008U (en) * | 2014-04-26 | 2014-09-03 | 重庆数码模车身模具有限公司 | Movable draw bead |
| CN109284515A (en) * | 2017-07-21 | 2019-01-29 | 上海梅山钢铁股份有限公司 | Method is determined based on the light sheet material Plastic Forming limit of finite element method (fem) analysis |
| CN111896373A (en) * | 2020-06-30 | 2020-11-06 | 武汉上善仿真科技有限责任公司 | Test and calculation method for measuring equivalent plastic strain forming limit diagram |
Non-Patent Citations (5)
| Title |
|---|
| The Application of Response Surface Method and Orthogonal Experiment Design in the Optimum Design for Drawbead Geometry Parameters;Lifen Han 等;《2010 International Conference on Digital Manufacturing & Automation》;IEEE;20110124;全文 * |
| 基于CAE技术汽车覆盖件冲压成形仿真研究;张雯娟等;《三明学院学报》;20111020(第05期);全文 * |
| 基于数值仿真的汽车冲压件的成形与优化;李一民;《热加工工艺》;20091010(第19期);全文 * |
| 拉延筋、压边力对冲压件成形性能的影响研究;柯桂颜等;《锻压技术》;20160520(第05期);全文 * |
| 汽车侧壁上外板冲压成形过程仿真及实验;白有俊等;《锻压技术》;20170921(第09期);全文 * |
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