CN114049440A - Three-dimensional design method and system for piercing knife of automobile stamping die - Google Patents
Three-dimensional design method and system for piercing knife of automobile stamping die Download PDFInfo
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- CN114049440A CN114049440A CN202111346739.4A CN202111346739A CN114049440A CN 114049440 A CN114049440 A CN 114049440A CN 202111346739 A CN202111346739 A CN 202111346739A CN 114049440 A CN114049440 A CN 114049440A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T17/00—Three dimensional [3D] modelling, e.g. data description of 3D objects
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/10—Geometric CAD
- G06F30/17—Mechanical parametric or variational design
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2113/00—Details relating to the application field
- G06F2113/22—Moulding
Abstract
The invention provides a three-dimensional design method and a system for a piercing cutter of an automobile stamping die, which comprise the following steps: acquiring cutting edge line data of a puncture knife and design requirements of the puncture knife, wherein the design requirements of the puncture knife comprise shape parameter requirements and flange design style requirements of the puncture knife; according to the design requirements of the puncture knife, approximately offsetting the cutting edge line, and optimizing the cutting edge line after approximately offsetting; constructing shape parameters and flange style data of the puncture knife; obtaining three-dimensional entity data of the puncture knife according to the constructed shape parameters and the flange style data; according to the design requirements of the puncture knife, the edge line is approximately offset, and the edge line after the approximately offset is optimized, so that the accuracy of the shape parameters and the flange style data of the constructed puncture knife is greatly improved, and the design quality of the puncture knife is improved; meanwhile, the mode of cutting by splicing is avoided, and the design efficiency is improved.
Description
Technical Field
The disclosure belongs to the technical field of computer aided design, and particularly relates to a three-dimensional design method and a three-dimensional design system for a piercing cutter of an automobile stamping die.
Background
The design and manufacture process of the automobile stamping part mainly comprises the following steps: the method comprises the steps of obtaining an original curved surface model, stamping according to a stamping process, and needing to puncture a curved surface part first, so that digital-analog tearing caused by the pulling force of a digital mold body in the stamping process is avoided.
At present, the time for using a cutting edge line to design a puncture knife is generally longer in large and medium-sized die enterprises, the labor intensity of workers is high, time and labor are wasted, and the production efficiency is low, mainly because the problems that the penetration modulus, the cutting edge surface, the vertical surface and the flange of the puncture knife are not adjusted in place, the puncture is not in place or the puncture amount is too large and the like occur. The reason why the puncture is not in place or the puncture amount is too large is that;
the inventor of the present disclosure finds that, at present, mainstream three-dimensional CAD software lacks a design function of a piercing cutter that can specifically meet the design requirements of a mold, and designers usually adopt a piecing mode to design the piercing cutter, which not only has low efficiency, but also has difficulty in ensuring quality precision.
Disclosure of Invention
The three-dimensional design method and the three-dimensional design system for the piercing cutter of the automobile stamping die have the advantages of being simple in operation, simple and convenient in algorithm, high in accuracy and efficiency and the like, and can well meet the requirements for adjusting the piercing cutter in various stamping die designs.
In order to achieve the purpose, the invention is realized by the following technical scheme:
in a first aspect, the present disclosure provides a three-dimensional design method for a piercing knife of an automobile stamping die, including:
acquiring cutting edge line data of a puncture knife and design requirements of the puncture knife, wherein the design requirements of the puncture knife comprise shape parameter requirements and flange design style requirements of the puncture knife;
according to the design requirements of the puncture knife, approximately offsetting the cutting edge line, and optimizing the cutting edge line after approximately offsetting;
constructing shape parameters and flange style data of the puncture knife;
and obtaining three-dimensional entity data of the puncture knife according to the constructed shape parameters and the flange style data.
Furthermore, when the cutting edge line data of the puncture knife is obtained, the control point data of the cutting edge line, the curvature of each control point and the expression parameters are obtained according to the cutting edge line.
Further, the approximately offsetting the edge line, and the optimizing the approximately offset edge line includes:
further, the cutting edge line and the areas on the two sides in the length direction are defined as a cutting edge line, a first cutting edge knife line and a second cutting edge knife line; the first cutting edge knife line and the second cutting edge knife line are respectively side lines for constructing two edge surfaces;
equally dividing the edge line, and offsetting and translating the equally divided points along a specified direction;
and carrying out duplication and intersection removal treatment on the biased and translated point cloud to obtain a smooth conformal cutting edge surface boundary line.
Further, when the edge line is equally divided, equally divided points of the edge line are acquired, and the points are moved in the direction and the distance.
Further, when the point cloud after offset and translation is subjected to duplicate removal and intersection removal processing, the point cloud after offset and translation is fitted into a curve, and the duplicate portion and the intersection portion are subjected to removal processing to obtain a target offset line.
Further, the shape parameters of the puncture knife comprise cutting edge surface curved surface data, vertical surface curved surface data, side surface curved surface data and bottom surface curved surface data; the flange style data is flange face curved surface data.
Further, when the three-dimensional entity data of the puncture knife is obtained, the first cutting edge knife line and the second cutting edge knife line are offset and moved according to the vertical surface curved surface data of the puncture knife, and a vertical surface curved surface is constructed.
In a second aspect, the present disclosure further provides a three-dimensional design system for a piercing tool of an automobile stamping die, including a data acquisition module, an optimization module, a data reconstruction module and a design module;
the data acquisition module is configured to: acquiring cutting edge line data of the puncture knife and design requirements of the puncture knife, wherein the design requirements of the puncture knife comprise shape parameter requirements and flange design style requirements of the puncture knife;
the optimization module is configured to: according to the design requirements of the puncture knife, the cutting edge line is approximately deflected, and the cutting edge line after the approximately deflection is optimized;
the data reconstruction module is configured to: constructing shape parameters and flange style data of the puncture knife;
the design module is configured to: and obtaining three-dimensional entity data of the piercing knife according to the constructed shape parameters and the flange style data.
In a third aspect, the present disclosure also provides a computer-readable storage medium, on which a computer program is stored, which when executed by a processor, implements the steps of the three-dimensional design method for a piercing knife of an automobile stamping die of the first aspect.
In a fourth aspect, the present disclosure further provides an electronic device, which includes a memory, a processor, and a computer program stored in the memory and executable on the processor, and when the processor executes the program, the steps of the three-dimensional design method for a piercing knife of an automobile stamping die in the first aspect are implemented.
Compared with the prior art, the beneficial effect of this disclosure is:
1. according to the design requirements of the puncture knife, the edge line is roughly offset, and the edge line after the approximate offset is optimized, so that the accuracy of the shape parameters and the flange style data of the constructed puncture knife is greatly improved, and the design quality of the puncture knife is improved; meanwhile, the mode of cutting by splicing is avoided, and the design efficiency is improved;
3. compared with a method adopting an artificial piecing design, the method can better meet engineering application, automatically calculate the input modulus of the puncture knife (calculate the frame-containing data of the input cutting edge line, carry out upward rounding on the highest point coordinate of the frame-containing of the cutting edge line according to the input stamping direction, and take the highest point data as the input modulus of the puncture knife), the cutting edge surface inclination angle (calculate the frame-containing data of the input cutting edge line; and adopt the included angle of the connecting line of the input stamping direction and the maximum point and the minimum point of the frame-containing of the cutting edge line as the inclination angle of the cutting edge surface), thereby improving the precision and efficiency of the design and having better practicability;
3. the method has the characteristics of simple operation, simple and convenient algorithm, high accuracy and efficiency and the like, and can well meet the requirements of adjustment of the piercing cutters in various stamping die designs.
Drawings
The accompanying drawings, which form a part hereof, are included to provide a further understanding of the present embodiments, and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the present embodiments and together with the description serve to explain the present embodiments without unduly limiting the present embodiments.
Fig. 1 is a flow chart of example 1 of the present disclosure;
FIG. 2 is a flowchart of the edge line and edge line boundary definition method according to embodiment 1 of the present disclosure;
fig. 3 is a flowchart of the blade edge line offset and offset optimization algorithm of embodiment 1 of the present disclosure.
The specific implementation mode is as follows:
the present disclosure is further described with reference to the following drawings and examples.
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
Example 1:
as shown in fig. 1, the present embodiment provides a three-dimensional design method for a piercing knife of an automobile stamping die, including:
acquiring cutting edge line data of a puncture knife and design requirements of the puncture knife, wherein the design requirements of the puncture knife comprise shape parameter requirements and flange design style requirements of the puncture knife; specifically, when acquiring the edge line data, the method is suitable for various parameterized curves, including quadratic curves, Bezier curves, B-spline curves and NURBS curves, and UG, ProE, CATIA, STEP and IGES curve models are received by adopting a Step format data exchange mode.
According to the design requirements of the puncture knife, approximately offsetting the cutting edge line, and optimizing the cutting edge line after approximately offsetting;
constructing shape parameters and flange style data of the puncture knife; specifically, cutting edge surface curved surface data, vertical surface curved surface data, side surface curved surface data and bottom surface curved surface data of the puncture knife are constructed, and required flange surface curved surface data are constructed;
and obtaining three-dimensional entity data of the puncture knife according to the constructed shape parameters and the flange style data.
In this embodiment, when the data of the cutting edge line of the lancet is acquired, the control point data of the cutting edge line, the curvature of each control point, and the parameters of the expression are acquired based on the cutting edge line.
In this embodiment, the substantially offsetting the edge line and the optimizing the substantially offset edge line includes:
in this embodiment, the cutting edge line and the regions on both sides in the length direction thereof are defined as a cutting edge line, a first cutting edge tool line, and a second cutting edge tool line; the first cutting edge knife line and the second cutting edge knife line are respectively side lines for constructing two edge surfaces; specifically, three regions are defined in the edge line and the left-right direction of the edge line: the cutting edge tool line is a curve which needs to be offset when the puncture tool is designed, the left cutting edge tool line is a side line for constructing a left edge face, and the right cutting edge tool line is a side line for constructing a right edge face.
In this embodiment, the edge line is equally divided into points, and the equally divided points are biased and translated along a specified direction by using a translation or bias algorithm; and carrying out duplication and intersection removal treatment on the point cloud after the offset and translation to obtain a smooth conformal cutting edge surface boundary line.
In this embodiment, when the edge line is equally divided, the equally divided point of the edge line is acquired, and the point is moved in the direction and the distance.
In this embodiment, when the biased and translated point cloud is subjected to the duplicate removal and de-intersection processing, the biased and translated point cloud is fitted into a curve, and the duplicate portion and the cross portion are removed to obtain the target bias line.
In this embodiment, the shape parameters of the piercing cutter include cutting edge surface curved surface data, vertical surface curved surface data, side surface curved surface data and bottom surface curved surface data; the flange style data is flange face curved surface data.
In this embodiment, when the three-dimensional entity data of the lancet is obtained, the first cutting edge tool line and the second cutting edge tool line are offset and moved according to the data of the vertical surface curved surface of the lancet, so as to construct a vertical surface curved surface; and constructing flange data according to the flange style.
Example 2:
the embodiment provides a three-dimensional design system for a piercing cutter of an automobile stamping die, which comprises a data acquisition module, an optimization module, a data reconstruction module and a design module;
the data acquisition module is configured to: acquiring cutting edge line data of the puncture knife and design requirements of the puncture knife, wherein the design requirements of the puncture knife comprise shape parameter requirements and flange design style requirements of the puncture knife;
the optimization module is configured to: according to the design requirements of the puncture knife, the cutting edge line is approximately deflected, and the cutting edge line after the approximately deflection is optimized;
the data reconstruction module is configured to: constructing shape parameters and flange style data of the puncture knife;
the design module is configured to: and obtaining three-dimensional entity data of the piercing knife according to the constructed shape parameters and the flange style data.
Example 3:
the present embodiment provides a computer-readable storage medium on which a computer program is stored, which when executed by a processor, implements the steps of the three-dimensional design method for a piercing knife of an automobile press mold described in embodiment 1.
Example 4:
the embodiment provides an electronic device, which comprises a memory, a processor and a computer program stored on the memory and capable of running on the processor, wherein the processor executes the program to realize the steps of the three-dimensional design method for the piercing knife of the automobile stamping die, which is described in embodiment 1.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and those skilled in the art can make various modifications and variations. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present embodiment should be included in the protection scope of the present embodiment.
Claims (10)
1. A three-dimensional design method of a puncture knife for an automobile stamping die is characterized by comprising the following steps:
acquiring cutting edge line data of a puncture knife and design requirements of the puncture knife, wherein the design requirements of the puncture knife comprise shape parameter requirements and flange design style requirements of the puncture knife;
according to the design requirements of the puncture knife, approximately offsetting the cutting edge line, and optimizing the cutting edge line after approximately offsetting;
constructing shape parameters and flange style data of the puncture knife;
and obtaining three-dimensional entity data of the puncture knife according to the constructed shape parameters and the flange style data.
2. The three-dimensional design method of the piercing cutter for the automobile stamping die as recited in claim 1, wherein when the data of the cutting edge line of the piercing cutter is obtained, the control point data of the cutting edge line, the curvature of each control point and the parameters of the expression are obtained according to the cutting edge line.
3. The three-dimensional design method of a piercing cutter for an automotive press tool as set forth in claim 1, wherein the substantially offset edge line is optimized by:
defining the cutting edge line and areas on two sides of the cutting edge line in the length direction as a cutting edge line, a first cutting edge knife line and a second cutting edge knife line; the first cutting edge knife line and the second cutting edge knife line are respectively side lines for constructing two edge surfaces;
equally dividing the edge line, and offsetting and translating the equally divided points along a specified direction;
and carrying out duplication and intersection removal treatment on the point cloud after the offset and translation to obtain a smooth conformal cutting edge surface boundary line.
4. The three-dimensional design method of the piercing cutter for the automobile stamping die as recited in claim 3, wherein the bisector of the edge line is obtained and the point is moved in the direction and the distance when the bisector is processed.
5. The three-dimensional design method of the piercing cutter for the automobile stamping die as claimed in claim 3, wherein, when the point cloud after offset and translation is subjected to de-weighting and de-intersection processing, the points after offset and translation are fitted into a curve, and the overlapped part and the crossed part are removed to obtain a target offset line.
6. The three-dimensional design method of the piercing cutter for the automobile stamping die as claimed in claim 1, wherein the shape parameters of the piercing cutter include cutting edge surface curved surface data, vertical surface curved surface data, side surface curved surface data and bottom surface curved surface data; the flange style data is flange face curved surface data.
7. The three-dimensional design method of the piercing cutter for the automobile stamping die as claimed in claim 3 or 6, wherein when the three-dimensional entity data of the piercing cutter is obtained, the first cutting edge tool line and the second cutting edge tool line are offset and moved according to the vertical surface curved surface data of the piercing cutter to construct a vertical surface curved surface.
8. A three-dimensional design system for a piercing cutter of an automobile stamping die is characterized by comprising a data acquisition module, an optimization module, a data reconstruction module and a design module;
the data acquisition module is configured to: acquiring cutting edge line data of a puncture knife and design requirements of the puncture knife, wherein the design requirements of the puncture knife comprise shape parameter requirements and flange design style requirements of the puncture knife;
the optimization module is configured to: according to the design requirements of the puncture knife, approximately offsetting the cutting edge line, and optimizing the cutting edge line after approximately offsetting;
the data reconstruction module is configured to: constructing shape parameters and flange style data of the puncture knife;
the design module is configured to: and obtaining three-dimensional entity data of the puncture knife according to the constructed shape parameters and the flange style data.
9. A computer-readable storage medium, on which a computer program is stored, which program, when being executed by a processor, carries out the steps of the method for three-dimensional design of a piercing knife for a stamping die for automobiles according to any of claims 1 to 7.
10. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor when executing the program implements the steps of the method for three-dimensional design of a piercing knife for an automotive press tool according to any one of claims 1 to 7.
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| CN202111346739.4A CN114049440B (en) | 2021-11-15 | 2021-11-15 | Three-dimensional design method and system for piercing knife of automobile stamping die |
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