Stamping die gas circuit pipeline design method
阅读说明：本技术 冲压模具气路管道设计方法 (Stamping die gas circuit pipeline design method ) 是由 胡海 于 2019-09-18 设计创作，主要内容包括：本发明涉及一种冲压模具气路管道设计方法,该方法预先设置了所有建模参数,不需要设计人员输入气路管道拐弯半径,气管直径、直线延长长度和管道数量等参数,有效减少了设计输入工作量；选择过滤器限定了设计只能选择圆弧面、圆柱面和倒圆面三种面,无需担心选错了其他类型的面；通过选择圆面,自动生成建立管道的所有线,包括：圆弧中心直线、连接线和倒圆线等,减少了设计人员操作步骤；自动生成气路管道实体并赋予特定的颜色；使用该方法将原来需要20分钟才能完成的设计任务在2分钟内就能完成,缩短了设计时间90％。(The invention relates to a stamping die gas circuit pipeline design method, which presets all modeling parameters, does not need designers to input parameters such as the turning radius of a gas circuit pipeline, the diameter of a gas pipe, the linear extension length, the number of pipelines and the like, and effectively reduces the design input workload; the selection of the filter limits that only three surfaces, namely an arc surface, a cylindrical surface and a rounded surface, can be selected in design, and the worry that other types of surfaces are selected by mistake is avoided; by selecting a circular surface, all lines of building a pipeline are automatically generated, including: the straight line of the arc center, the connecting line, the rounding line and the like reduce the operation steps of designers; automatically generating an air path pipeline entity and endowing the entity with a specific color; the method can complete the original design task which can be completed within 20 minutes within 2 minutes, and shortens the design time by 90 percent.)
1. A design method of a stamping die gas circuit pipeline comprises the following steps:
(1) creation of straight lines
Selecting a casting lightening hole circular surface to generate a central line L1 of the circular surface, and extending two ends of a central line L1 to form an extended central line L11;
selecting the round surface of the lightening hole of the next casting again to generate a central line L2 of the round surface, wherein two ends of the central line L2 are extended to form an extended central line L21;
creating a connecting line M between the extended centerline L11 and the extended centerline L21;
(2) between two straight lines, rounding off
Rounding the extension central line L11 and the connecting line M, rounding the extension central line L21 and the connecting line M, and generating two rounding arc lines R;
(3) linear suture
Selecting the round surface of the lightening hole of the casting for multiple times according to the steps (1) and (2), generating multiple sections of extended central lines, connecting lines and rounding arc lines, stitching the lines into a smooth single spline curve S by using a curve stitching function, and simultaneously deleting redundant straight lines and arc lines;
(4) and a generation pipeline
Solving the starting endpoint of the spline curve, and creating a circular curve by taking the starting endpoint as the circle center and the tangent vector at the starting endpoint of the spline curve as the axis; and generating a gas path pipeline entity by taking the spline curve as a sweep track central line and a preset pipeline diameter D as a gas path diameter.
2. The stamping die air passage pipeline design method as claimed in claim 1, wherein: both ends of the center line L1 and both ends of the center line L2 are extended by 30mm, namely: L11-L1-60 mm, L21-L2-60 mm prevent the resulting tubing from interfering with the lightening hole sidewalls.
3. The stamping die air passage pipeline design method as claimed in claim 1, wherein: the radius of the rounding arc line R is 20 mm.
4. The stamping die air passage pipeline design method as claimed in claim 1, wherein: the diameter D of the pipeline is 12 mm.
Technical Field
The invention relates to a stamping die, in particular to a method for designing a gas path pipeline of the stamping die.
Background
In the design and development process of an automobile stamping die, a large number of air cylinders and nitrogen springs are needed, compressed air for pushing the air cylinders to move needs to be introduced into the air cylinders in the die from air supply ports of a press through pipelines, the pipelines for connecting the air supply ports of the press and the air cylinders need to be designed manually by designers, and the paths and the trends of air paths need to be planned in advance.
The traditional gas path design method is that the basic function of CAD software is used, the gas path central line is built step by the general modeling methods of drawing lines, cutting, stretching, rounding and the like in space, a plurality of lines are stitched into a single composite spline curve, and a pipeline is generated by the gas path central line; the operations all need manual operation of designers, the center line is created step by step, the modeling efficiency is very low, and the workload is very large.
In the traditional pipeline design, a designer needs to create a plurality of straight lines connected end to end, establish a rounding line by rounding the lines and the lines, form a plurality of smooth lines by all the straight lines and the rounding lines, and generate a gas path pipeline by scanning; the numerical values of the radius, the diameter of the pipeline and the like are required to be input by a user; meanwhile, only one pipeline can be generated at a time, and all the previous steps are required to be repeated when a plurality of pipelines are generated; the operation steps are very complicated, the steps are multiple, the workload is large, and the improvement of the pipeline design efficiency of designers is directly influenced.
Disclosure of Invention
In order to solve the problems, the invention provides a method for designing a gas circuit pipeline of a stamping die, which can improve the standardized design of the gas circuit pipeline, reduce the workload of the gas circuit pipeline design and shorten the design period.
The technical scheme adopted by the invention is as follows: a design method of a stamping die gas circuit pipeline comprises the following steps:
(1) creation of straight lines
Selecting a casting lightening hole circular surface to generate a central line L1 of the circular surface, and extending two ends of a central line L1 to form an extended central line L11;
selecting the round surface of the lightening hole of the next casting again to generate a central line L2 of the round surface, wherein two ends of the central line L2 are extended to form an extended central line L21;
creating a connecting line M between the extended centerline L11 and the extended centerline L21;
(2) between two straight lines, rounding off
Rounding the extension central line L11 and the connecting line M, rounding the extension central line L21 and the connecting line M, and generating two rounding arc lines R;
(3) linear suture
Selecting the round surface of the lightening hole of the casting for multiple times according to the steps (1) and (2), generating multiple sections of extended central lines, connecting lines and rounding arc lines, stitching the lines into a smooth single spline curve S by using a curve stitching function, and simultaneously deleting redundant straight lines and arc lines;
(4) and a generation pipeline
Solving the starting endpoint of the spline curve, and creating a circular curve by taking the starting endpoint as the circle center and the tangent vector at the starting endpoint of the spline curve as the axis; and generating a gas path pipeline entity by taking the spline curve as a sweep track central line and a preset pipeline diameter D as a gas path diameter.
Preferably, both ends of the center line L1 and both ends of the center line L2 are extended by 30mm, that is: L11-L1-60 mm, L21-L2-60 mm prevent the resulting tubing from interfering with the lightening hole sidewalls.
Preferably, the radius of the rounded arc R is 20 mm.
Preferably, the diameter D of the pipe is 12 mm.
The beneficial effects obtained by the invention are as follows:
(1) all modeling parameters are preset, so that a designer does not need to input parameters such as the turning radius of a gas path pipeline, the diameter of a gas pipe, the linear extension length and the number of pipelines, and the design input workload is effectively reduced;
(2) the selection of the filter limits that only three surfaces, namely an arc surface, a cylindrical surface and a rounded surface, can be selected in design, and the worry that other types of surfaces are selected by mistake is avoided;
(3) by selecting a circular surface, all lines of building a pipeline are automatically generated, including: the straight line of the arc center, the connecting line, the rounding line and the like reduce the operation steps of designers;
(4) automatically generating an air path pipeline entity and endowing the entity with a specific color;
(5) the method can complete the original design task which can be completed within 20 minutes within 2 minutes, and shortens the design time by 90 percent.
Drawings
FIG. 1 is a schematic illustration of creating an extended centerline;
FIG. 2 is a schematic diagram of creating an extended centerline and connecting lines;
FIG. 3 is a schematic view of creating a rounded arc R between an extended centerline and a connecting line;
FIG. 4 is a schematic diagram of a generating gas circuit pipeline entity;
FIG. 5 is a schematic view of a pipe design in a stamping die;
fig. 6 is a schematic diagram of the present invention.
Detailed Description
The invention will be further described with reference to the following drawings and specific embodiments.
As shown in fig. 1 to 6, the method for designing the gas path pipeline of the stamping die of the present invention includes the following steps:
(1) creation of straight lines
Selecting a casting lightening hole round surface, generating a central line L1 of the round surface, and extending two ends of a central line L1 to form an extended central line L11 (red line); the method comprises the following steps of (1) solving the maximum length of the axis vector direction and the vector direction of a circular surface by selecting a circular surface of a casting lightening hole, solving the coordinates of a mass center point of the circular surface, and calculating the coordinates of two end points according to the coordinates of the mass center point, the vector direction and the length: the coordinate of the
selecting the round surface of the next casting lightening hole again to generate a central line L2 of the round surface, and extending two ends of the central line L2 to form an extended central line L21 (red line);
solving the shortest distance between the two straight lines (L11 and L21) to obtain two shortest distance end points, and creating a connecting line M (blue line) between the extended central line L11 and the extended central line L21;
(2) between two straight lines, rounding off
Rounding the extension central line L11 and the connecting line M, rounding the extension central line L21 and the connecting line M to generate two rounding arc lines R (cyan lines), wherein R is 20 mm;
(3) linear suture
Selecting the round surface of the lightening hole of the casting for multiple times according to the steps (1) and (2), generating multiple sections of extended central lines, connecting lines and rounding arc lines, stitching the lines into a smooth single spline curve S (blue line) by using a curve stitching function, and deleting redundant straight lines and arc lines;
(4) and a generation pipeline
Solving the starting endpoint of the spline curve, and creating a circular curve by taking the starting endpoint as the circle center and the tangent vector at the starting endpoint of the spline curve as the axis; and (3) generating an air path pipeline entity by taking the spline curve as a sweep-over trajectory central line and taking a preset pipeline diameter D (D is 12mm) as an air path diameter.
The foregoing shows and describes the general principles and principal structural features of the present invention. The present invention is not limited to the above examples, and various changes and modifications may be made without departing from the spirit and scope of the invention, which fall within the scope of the claimed invention. The scope of the invention is defined by the appended claims and equivalents thereof.
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