CN115201442A - Method, device and equipment for evaluating ear making performance of plate and storage medium - Google Patents
Method, device and equipment for evaluating ear making performance of plate and storage medium Download PDFInfo
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Abstract
The embodiment of the invention provides a method, a device, equipment and a storage medium for evaluating the lug making performance of a plate. The method comprises the steps of firstly carrying out cup punching processing on a plate, obtaining a lug making contour after the cup punching processing, then determining a reference contour on the plate after the cup punching processing, and finally determining the lug making rate of the plate based on the reference contour and the lug making contour. Compared with the current method for calculating the ear making rate based on the ear making peak height, the average value of the ear making valley height and the average ear making height, the situation that the number of the ear making peaks is different from that of the ear making valleys, but the ear making rate is the same may occur. According to the embodiment of the invention, the number of the ear making peaks or the ear making valleys does not need to be counted, the ear making rate is determined based on the difference between the ear making outline and the reference outline, and the situation that the number of the ear making peaks is different from that of the ear making valleys but the ear making rate is the same is avoided, so that the determined ear making rate is more accurate.
Description
Technical Field
The invention relates to the technical field of material performance inspection, in particular to a method, a device, equipment and a storage medium for evaluating the lug making performance of a plate.
Background
Due to the anisotropy of the cold-rolled sheet material, when the cold-rolled sheet material is subjected to deep drawing, the lug making phenomenon occurs at the cup opening of the drawn cup due to different plastic deformation capacities of the material in all directions. Deep-drawing the lug not only causes the waste of materials and seriously reduces the utilization rate of the materials, but also causes the weakening of the performance of the finished product due to large deformation in the lug-making area.
For deep drawn articles, the deformation of the material in all directions is preferably uniform, and the earing phenomenon should be minimized or avoided. At present, the ear making performance of the material during deep drawing is generally measured by ear making rate, and the ear making rate is generally obtained based on the average ear making peak height, the average ear making valley height and the average ear making height. In the calculation method, although the average value of the height of each auricle-making peak and the height of each auricle-making valley is considered, the width and the area of each auricle-making peak and each auricle-making valley are not considered.
On the other hand, due to the irregularity of the contour of the cup mouth after the actual cup punching experiment, whether a certain position is an ear making peak or an ear making valley cannot be determined, and then the average value of the ear making peak or the ear making valley is difficult to calculate, so that the corresponding ear making rate is difficult to determine.
Disclosure of Invention
The embodiment of the invention provides a method, a device, equipment and a storage medium for evaluating the lug making performance of a plate, and solves the technical problem that the existing lug making performance of the plate is not accurately evaluated.
In a first aspect, an embodiment of the present invention provides a method for evaluating tab making performance of a sheet material, including: carrying out cup punching treatment on the plate, and obtaining the lug making contour after the cup punching treatment; determining a reference contour on the plate subjected to the cup punching treatment; and determining the earing rate of the plate material based on the reference profile and the earing profile.
Preferably, after the sheet material is subjected to the cup punching process, the sheet material is formed with a cup body and a cup bottom, and the reference profile is determined on the punched sheet material, and the method includes: and selecting a contour line parallel to the bottom of the cup body on the cup body, and determining the contour line as the reference contour.
Preferably, the determining the earing rate of the plate material based on the reference profile and the earing profile includes: determining an actual distance between the reference profile and the ear making profile; and determining the earing rate of the plate based on the length of the reference contour and the actual distance.
Preferably, the determining the earing rate of the plate material based on the length of the reference profile and the actual distance comprises: calculating an arithmetic mean deviation of the distance between the auricle-making contour and the reference contour based on the length of the reference contour and the actual distance; determining the auriparing rate based on the arithmetic mean deviation and a reference distance between the auriparing contour and the reference contour.
In a second aspect, the present invention provides a sheet material tab performance evaluation apparatus, including:
the punching unit is used for punching the cup on the plate and acquiring the lug making contour after the cup punching;
the reference contour acquisition unit is used for determining a reference contour on the plate subjected to the cup punching processing;
and the lug making performance evaluation unit is used for determining the lug making rate of the plate based on the reference profile and the lug making profile.
Preferably, after the sheet material is subjected to the cup punching process, the sheet material is formed with a cup body and a cup bottom, and the reference profile obtaining unit is specifically configured to: and selecting a contour line parallel to the bottom of the cup body on the cup body, and determining the contour line as the reference contour.
Preferably, the ear-making performance evaluation unit includes:
a first calculating subunit, configured to determine an actual distance between the reference contour and the ear making contour;
and the second calculating subunit is used for determining the earing rate of the plate based on the length of the reference contour and the actual distance.
Preferably, the second calculating subunit is specifically configured to:
calculating an arithmetic mean deviation of the distance between the auricle-making contour and the reference contour based on the length of the reference contour and the actual distance;
determining the auriparing rate based on the arithmetic mean deviation and a reference distance between the auriparing contour and the reference contour.
In a third aspect, the present invention provides, by way of an embodiment of the present invention, a sheet material ear performance evaluation apparatus, including a memory, a processor, and a computer program stored on the memory and executable on the processor, where the processor implements any one of the embodiments in the first aspect when executing the program.
In a fourth aspect, the present invention provides a computer-readable storage medium, on which a computer program is stored, which, when executed by a processor, implements any of the embodiments of the first aspect.
One or more technical solutions provided in the embodiments of the present invention have at least the following technical effects or advantages:
compared with the current method for calculating the ear making rate based on the average value of the ear making peak height, the average value of the ear making valley height and the average ear making height, although the calculation method considers the average values of the ear making peak height and the ear making valley height, the number of the ear making peaks and the ear making valleys only affects the average height of the ear making peaks and the ear making valleys, and the situation that the number of the ear making peaks and the ear making valleys is different but the ear making rate is the same can occur, obviously, the calculation method is not accurate.
The method comprises the steps of firstly carrying out cup punching on a plate, obtaining the lug making contour after the cup punching, then determining a reference contour on the plate after the cup punching, and finally determining the lug making rate of the plate based on the reference contour and the lug making contour. According to the embodiment of the invention, the number of the ear making peaks or the ear making valleys is not required to be counted, the ear making rate is determined based on the difference between the ear making profile and the reference profile, and the situation that the number of the ear making peaks and the number of the ear making valleys are different but the ear making rate is the same is avoided, so that the determined ear making rate is more accurate.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.
FIG. 1 is a schematic view of a manufactured outline of a sheet material;
FIG. 2 is a schematic view of another lug making profile of the sheet material;
FIG. 3 is a flowchart of a method for evaluating ear-making performance of a plate material according to an embodiment of the present invention;
FIG. 4 is a schematic view of the structure of a device for evaluating lug-making performance of a plate material in an embodiment of the present invention;
FIG. 5 is a schematic diagram of the structure of a device for evaluating the lug-making performance of a plate material in the embodiment of the present invention;
fig. 6 is a schematic diagram of a structure of a computer-readable storage medium in an embodiment of the present invention.
Detailed Description
The embodiment of the invention provides a method, a device, equipment and a storage medium for evaluating the lug making performance of a plate, and solves the technical problem that the existing lug making performance of the plate is not accurately evaluated.
In order to solve the technical problems, the embodiment of the invention provides the following general ideas:
firstly, carrying out cup punching processing on a plate, obtaining an ear making outline after the cup punching processing, then determining a reference outline on the plate after the cup punching processing, and finally determining the ear making rate of the plate based on the reference outline and the ear making outline.
In order to better understand the technical scheme, the technical scheme is described in detail in the following with reference to the attached drawings of the specification and specific embodiments.
First, it is stated that the term "and/or" appearing herein is merely one type of associative relationship that describes an associated object, meaning that three types of 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.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or otherwise described herein.
First, it should be noted that, in the prior art, when calculating the earing rate of the plate material, the earing rate is calculated based on the average value of the height of the earing peak and the height of the earing valley and the average earing height, specifically, the earing rate is calculated by using the following formulas (1) to (4):
wherein, the first and the second end of the pipe are connected with each other,
is an average height value of the auricle-making peaks,
the average height value of the prepared ear valley and Z is the prepared ear rate.
When calculating the auricle making rate for the auricle making contour as shown in FIG. 1, the auricle making rate can be obtained
Similarly, when calculating the ear-making rate of the ear-making contour shown in fig. 2, the ear-making rate can still be obtained
Obviously, the lug making profile of the plate shown in fig. 2 is worse than that of the plate shown in fig. 1, so that the evaluation of the lug making performance of the plate by using the existing lug making rate calculation method is inaccurate.
In a first aspect, the present invention provides a method for evaluating tab-making performance of a sheet material, which may be applied to a punching process of a plastic sheet material, and specifically, the plastic sheet material may include a cold-rolled sheet material.
Referring to fig. 3, the method for evaluating the tab-making performance of the plate may include the following steps S301 to S303:
step S301: and (4) carrying out cup punching treatment on the plate, and obtaining the ear making profile after the cup punching treatment.
The punching head of the punching equipment can be utilized to punch the plate, after the plate is punched, the plate is formed with a cup body and a cup bottom, and the lug making contour can also appear at the cup opening of the cup body.
In particular, the ear-making contour may be obtained by mapping, in some embodiments, the ear-making contour at the cup may be obtained by using computer image recognition, or the ear-making contour may be obtained by manual mapping.
Step S302: and determining a reference contour on the punched plate.
Specifically, a contour line parallel to the bottom of the cup can be selected on the cup body, and the contour line is determined as a reference contour.
In the specific implementation process, the contour line can be selected on the cup body according to the actual situation of the ear making contour. In order to avoid that the lug making valley is too low so that the reference contour is incomplete, the contour line of the junction of the cup bottom and the cup body can be set as the reference contour.
Step S303: and determining the earing rate of the plate based on the reference profile and the earing profile.
Specifically, the actual distance between the reference profile and the lug making profile can be determined, and then the lug making rate of the plate can be determined based on the length of the reference profile and the actual distance.
In a specific implementation, the reference profile may be set as an abscissa, so that the actual distance between the reference profile and the auricle-making profile can be represented by an ordinate. For example, a function may be used to characterize the actual distance between the reference profile and the auricle profile.
Specifically, an arithmetic mean deviation of the distance between the lug making contour and the reference contour may be calculated based on the length of the reference contour and the actual distance, and then the lug making ratio may be determined based on the arithmetic mean deviation and the reference distance between the lug making contour and the reference contour.
In a specific implementation process, the reference distance between the lug making contour and the reference contour can be set according to actual use habits. For example, the shortest distance between the auricle-making contour and the reference contour may be set as the reference distance; of course, the longest distance between the lug making contour and the reference contour may also be set as the reference distance.
In particular implementations, the arithmetic mean deviation of the distance between the auricle-making contour and the reference contour can be calculated using the ratio of the actual distance to the length of the reference contour.
For example, the arithmetic mean deviation of the distance between the auricle-making contour and the reference contour can be calculated by using the following formula:
where H is the arithmetic mean deviation, L is the length of the reference profile, and H (L) is the actual distance between the reference profile and the auricle-making profile.
In particular implementations, the auricle making rate may be determined based on a difference between the arithmetic mean deviation and a reference distance.
In some embodiments, the eardrop rate can be calculated using the following formula:
wherein Z is the auricle making rate, H is the arithmetic mean deviation of the distance between the auricle making contour and the reference contour, H Reference to Is a reference distance.
Since the length of the reference profile can be determined based on the punch size of the punching device, the earing ratio can also be expressed by the following formula:
wherein D is the diameter of the punch of the punching equipment, h Reference to For the reference distance, h (l) is the actual distance between the reference profile and the auricle profile.
The method for evaluating the plate lug making performance provided by the embodiment of the invention avoids the process of identifying lug making peaks and/or lug making valleys, and can reflect the comprehensive conditions of the number, the width, the area and the like of the plate lug making peaks and the lug making valleys. The method can further reflect the condition of material waste caused by the need of edge cutting and blanking due to the lug making phenomenon after the material is subjected to the deep drawing process and the thinning and stretching process.
In a second aspect, based on the same inventive concept, the invention provides a device for evaluating the tab making performance of a sheet material, which can be applied to a punching process of a plastic sheet material, and particularly, the plastic sheet material can comprise a cold-rolled sheet material.
Referring to fig. 4, the apparatus for evaluating ear-making performance of a plate material may include:
and the punching unit 401 is used for performing cup punching processing on the plate and acquiring the ear making profile after the cup punching processing.
A reference contour acquiring unit 402, configured to determine a reference contour on the punched plate material.
And an ear-making performance evaluation unit 403 for determining an ear-making rate of the plate material based on the reference profile and the ear-making profile.
Specifically, after the sheet material is subjected to cup punching, the sheet material is formed with a cup body and a cup bottom. As an optional implementation manner, the reference contour obtaining unit is specifically configured to: and selecting a contour line parallel to the bottom of the cup body on the cup body, and determining the contour line as a reference contour.
As an alternative embodiment, the ear making performance evaluation unit includes:
the first calculating subunit is used for determining the actual distance between the reference contour and the ear-making contour;
and the second calculating subunit is used for determining the earing rate of the plate based on the length of the reference contour and the actual distance.
As an optional implementation manner, the second calculating subunit is specifically configured to:
calculating an arithmetic mean deviation of the distance between the auricle-making contour and the reference contour based on the length of the reference contour and the actual distance; and determining the auricle making rate based on the arithmetic mean deviation and the reference distance between the auricle making contour and the benchmark contour.
Since the plate lug making performance evaluation apparatus described in this embodiment is an electronic device used for implementing the plate lug making performance evaluation method in the embodiment of the present invention, based on the plate lug making performance evaluation method described in the embodiment of the present invention, a person skilled in the art can understand a specific implementation manner and various variations of the electronic device in this embodiment, and therefore, a detailed description of how to implement the method in the embodiment of the present invention by the electronic device is not described here. As long as those skilled in the art implement the electronic device used in the method for evaluating the tab-making performance of the sheet material in the embodiment of the present invention, the electronic device is within the scope of the present invention.
In a third aspect, based on the same inventive concept, embodiments of the present invention provide a device for evaluating tab-making performance of a sheet material, which may be applied to a punching process of a plastic sheet material, and specifically, the plastic sheet material may include a cold-rolled sheet.
Referring to fig. 5, an ear-making performance evaluation apparatus for a plate material according to an embodiment of the present invention includes: a memory 501, a processor 502 and code stored on the memory and executable on the processor 502, wherein the processor 502 implements any one of the foregoing methods for evaluating the ear-making performance of a sheet material when executing the code.
Wherein in fig. 5 a bus architecture (represented by bus 500), bus 500 may include any number of interconnected buses and bridges, bus 500 linking together various circuits including one or more processors, represented by processor 502, and memory, represented by memory 501. The bus 500 may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. A bus interface 505 provides an interface between the bus 500 and the receiver 503 and transmitter 504. The receiver 503 and the transmitter 504 may be the same element, i.e., a transceiver, providing a means for communicating with various other apparatus over a transmission medium. The processor 502 is responsible for managing the bus 500 and general processing, and the memory 501 may be used for storing data used by the processor 502 in performing operations.
In a fourth aspect, as shown in fig. 6, based on the same inventive concept, the present invention provides a computer-readable storage medium 600, on which a computer program 601 is stored, wherein the computer program 601, when executed by a processor, implements any one of the foregoing methods for evaluating ear-making performance of a sheet material.
The technical scheme in the embodiment of the invention at least has the following technical effects or advantages:
according to the embodiment of the invention, the plate is firstly subjected to cup punching, the ear making profile after the cup punching is obtained, then the reference profile is determined on the plate subjected to the cup punching, and finally the ear making rate of the plate is determined based on the reference profile and the ear making profile. According to the embodiment of the invention, the number of the ear making peaks or the ear making valleys does not need to be counted, the ear making rate is determined based on the difference between the ear making outline and the reference outline, and the situation that the number of the ear making peaks is different from that of the ear making valleys but the ear making rate is the same is avoided, so that the determined ear making rate is more accurate.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the invention may take the form of a computer product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) having computer-usable code embodied therein.
The present invention has been described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer instructions. These computer instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (10)
1. A method for evaluating tab-making performance of a sheet material is characterized by comprising the following steps:
carrying out cup punching treatment on the plate, and obtaining the lug making contour after the cup punching treatment;
determining a reference contour on the plate subjected to the cup punching treatment;
and determining the earing rate of the plate material based on the reference profile and the earing profile.
2. The method of claim 1, wherein after the cupping of the sheet of material, the sheet of material is formed with a cup and a cup bottom, and wherein determining the reference profile on the cupped sheet of material comprises:
and selecting a contour line parallel to the bottom of the cup body on the cup body, and determining the contour line as the reference contour.
3. The method of claim 1 or 2, wherein said determining the earing ratio of the sheet material based on the reference profile and the earing profile comprises:
determining an actual distance between the reference profile and the ear making profile;
and determining the earing rate of the plate material based on the length of the reference contour and the actual distance.
4. The method of claim 3, wherein said determining the earing ratio of the sheet material based on the length of the reference profile and the actual distance comprises:
calculating an arithmetic mean deviation of the distance between the auricle-making contour and the reference contour based on the length of the reference contour and the actual distance;
determining the auricle making rate based on the arithmetic mean deviation and a reference distance between the auricle making profile and the reference profile.
5. A sheet material tab-making performance evaluation device is characterized by comprising:
the punching unit is used for punching the plate and acquiring the lug making contour after punching;
a reference contour acquiring unit, configured to determine a reference contour on the plate processed by the punching cup;
and the lug making performance evaluation unit is used for determining the lug making rate of the plate material based on the reference profile and the lug making profile.
6. The apparatus according to claim 5, characterized in that, after the sheet material has been subjected to the cupping treatment, the sheet material is formed with a cup and a cup bottom, the reference profile acquisition unit being in particular adapted to:
and selecting a contour line parallel to the cup bottom on the cup body, and determining the contour line as the reference contour.
7. The apparatus of claim 5 or 6, wherein the auris-making performance evaluation unit comprises:
a first calculating subunit, configured to determine an actual distance between the reference contour and the ear-making contour;
and the second calculating subunit is used for determining the earing rate of the plate based on the length of the reference contour and the actual distance.
8. The apparatus of claim 7, wherein the second computing subunit is specifically configured to:
calculating an arithmetic mean deviation of the distance between the auricle-making contour and the reference contour based on the length of the reference contour and the actual distance;
determining the auriparing rate based on the arithmetic mean deviation and a reference distance between the auriparing contour and the reference contour.
9. A sheet-material tab performance evaluation apparatus comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor implements the method of any of claims 1-4 when executing the program.
10. A computer-readable storage medium, on which a computer program is stored, which program, when being executed by a processor, is adapted to carry out the method of any one of claims 1 to 4.
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| CN110814145A (en) * | 2019-11-21 | 2020-02-21 | 湖南工业大学 | Method for reducing lug forming rate of drawn part |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110814145A (en) * | 2019-11-21 | 2020-02-21 | 湖南工业大学 | Method for reducing lug forming rate of drawn part |
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| 刘向明等: "薄板制耳性能评价方法的探讨", 物理测试, vol. 37, no. 1, 28 February 2019 (2019-02-28), pages 30 * |
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