CN112307576A - Three-dimensional chemical milling sample plate rapid design method - Google Patents
Three-dimensional chemical milling sample plate rapid design method Download PDFInfo
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Abstract
The invention discloses a rapid design method of a three-dimensional milling sample plate, which comprises the steps of generating a structure tree, modeling the three-dimensional milling sample plate and detecting the three-dimensional milling sample plate; the structure tree generation is used for generating a general assembly node, a part node and a standard component node in the CATIA and inputting corresponding material and standard component information; the three-dimensional milling sample plate modeling comprises sample plate profile design, sample plate lug piece design and sample plate reinforcing rib design which are sequentially carried out, wherein the sample plate lug piece design is that projection points are obtained on the side lines of the main body curved surface of the projection according to the intersection points of the hole axis of a die hole and the main body curved surface of the sample plate, so that a lug piece curve is generated, the lug piece curved surface is cut, and the lug piece curved surface is established. The invention realizes the rapid design of the three-dimensional chemical milling sample plate, thereby shortening the development period of the three-dimensional chemical milling sample plate.
Description
Technical Field
The invention belongs to the technical field of digital manufacturing, and particularly relates to a rapid design method of a three-dimensional chemical milling sample plate.
Background
The three-dimensional milling sample plate is used for chemical corrosion forming and is adopted in large-scale parts such as airplane skins and the like, the traditional three-dimensional milling sample plate design adopts an analog quantity design and a manual trimming and cutting manufacturing mode, and along with the improvement of the precision and the quality of airplane parts, the mode cannot meet the current generation requirement, so that the digital quantity transmission is adopted, and the numerical control processing manufacturing mode becomes the development trend of the three-dimensional milling sample plate.
At present, the design of the three-dimensional chemical milling sample plate is mainly completed by a designer through manual operation of CAD software, the operation process is complicated, the quality problem is easy to occur, and the development period of the three-dimensional chemical milling sample plate is long. Therefore, the invention provides a typical knowledge type method for establishing a digital-analog model of a three-dimensional milling sample plate, which can develop corresponding software in a CATIA environment to realize the rapid design of the three-dimensional milling sample plate, thereby shortening the development period of the three-dimensional milling sample plate. The current aircraft new model development period is short, the quality requirement is high, the production preparation period is short, and the three-dimensional milling template development belongs to a part of production preparation, so that the shortening of the three-dimensional milling template development period is the requirement of users, and the necessary way of cost reduction and efficiency improvement is realized.
Disclosure of Invention
The invention aims to provide a method for quickly designing a three-dimensional chemical milling sample plate, and aims to realize quick design of the three-dimensional chemical milling sample plate so as to shorten the development period of the three-dimensional chemical milling sample plate.
The invention is mainly realized by the following technical scheme: a three-dimensional chemical milling sample plate rapid design method comprises structure tree generation, modeling of a three-dimensional chemical milling sample plate and detection of the three-dimensional chemical milling sample plate; the structure tree generation is used for generating a general assembly node, a part node and a standard component node in the CATIA and inputting corresponding material and standard component information; the three-dimensional milling sample plate modeling comprises sample plate profile design, sample plate lug piece design and sample plate reinforcing rib design which are sequentially carried out, wherein the sample plate lug piece design is that projection points are obtained on the side lines of the main body curved surface of the projection according to the intersection points of the hole axis of a die hole and the main body curved surface of the sample plate, so that a lug piece curve is generated, the lug piece curved surface is cut, and the lug piece curved surface is established.
In order to better realize the invention, further, in the design of the template profile, the surface of the sticking mold is cut according to the outline of a product to obtain the curved surface of the template main body; and cutting off the chemical milling area of the curved surface of the sample plate main body according to the chemical milling allowance line.
In order to better implement the present invention, further, the formula for establishing the milling allowance line is as follows:
the formula of the primary chemical milling calculation is as follows:
B＝c×b
the quadratic chemical milling calculation formula is as follows:
wherein B is the width of the chemical milling allowance;
c is the corrosion coefficient;
a is the depth of the secondary chemical milling;
and b is the primary milling depth.
In order to better realize the invention, further, a hole axis A is generated by using a mould hole, a point B is formed by using the intersection of a mould film sticking surface S and the hole axis A in space, and the point B forms a point C on the side line of the main curved surface of the projection sample plate; forming a point D and a point F which are 30-40mm away from the point C on the sideline L of the main curved surface of the sample plate through a point command; cutting the main curved surface sideline L through a point D and a point E to form a curve DE; the curve DE translates 40mm at equal intervals on the die lamination surface S to form a curve FG; 4 end points of the connecting curve DE and the connecting curve FG form a wire frame H; projecting the wire frame H onto the die film attaching surface S to form a new wire frame M; and cutting the film pasting surface S of the die by using a wire frame M to obtain the three-dimensional milling sample plate lug curved surface.
In order to better realize the invention, a combination command is further applied to combine the template main body curved surface and the lug sheet curved surface; generating a template three-dimensional digital model by applying an equal-thickness surface command; rounding the lug by a rounding command; and pouring the bushing hole according to the hole axis and the size of the die hole by using a hole command.
In order to better realize the invention, further, in the design of the sample plate reinforcing rib, reinforcing ribs need to be added when the curve exceeds 800mm, and 4 points with the spacing of 40mm are generated by using a point command; generating a reinforcing rib sideline by using a linear command; generating a reinforcing rib wire frame by applying a combination command; generating a reinforcing rib curved surface by applying a cutting command; and generating a template entity by using the thick surface name.
In order to better realize the invention, further, the structure tree generation comprises ordering list information reading, digital-analog structure tree and design basis leading-in; and extracting the order information from a file identified by a webpage or saved by the webpage, generating an assembly node according to the extracted information, importing mold digital-analog basis information, and identifying the mold lug hole position information, the product appearance line, the chemical milling allowance line and the mold forming molded surface.
In order to better realize the invention, further, the three-dimensional chemical milling template detection comprises profile fitting detection and chemical milling allowance line fitting detection.
In order to better implement the invention, further, the modeling of the three-dimensional milling template mainly comprises the following steps:
step S100: inputting the outline of the product with the cutting elements, cutting the surface of the die to obtain the curved surface of the template main body,
step S200: inputting a cutting element milling allowance line, and cutting a milling area of the curved surface of the sample plate main body;
step S300: modeling the curved surface of the sample plate lug plate: generating a hole axis A by using a mold hole, and forming a point B by using the intersection of the mold film pasting surface S and the hole axis A in space, wherein the point B forms a point C on the side line of the main curved surface of the projection sample plate; forming a point D and a point F which are 30-40mm away from the point C on the sideline L of the main curved surface of the sample plate through a point command; cutting the main curved surface sideline L through a point D and a point E to form a curve DE; the curve DE translates 40mm at equal intervals on the die lamination surface S to form a curve FG; 4 end points of the connecting curve DE and the connecting curve FG form a wire frame H; projecting the wire frame H onto the die film attaching surface S to form a new wire frame M; cutting the die film surface S by using a wire frame M to obtain a three-dimensional milling sample plate lug curved surface;
step S400: modeling a template entity: combining the template main body curved surface and the lug sheet curved surface by using a combination command; generating a template three-dimensional digital model by applying an equal-thickness surface command; rounding the lug by a rounding command; pouring a bushing hole according to the hole axis and the size of the die hole by using a hole command;
step S500: modeling a sample plate reinforcing rib: when the curve exceeds 800mm, reinforcing ribs need to be added, and 4 points with the spacing of 40mm are generated by using a point command; generating a reinforcing rib sideline by using a linear command; generating a reinforcing rib wire frame by applying a combination command; generating a reinforcing rib curved surface by applying a cutting command; and generating a template entity by using the thick surface name.
The invention mainly comprises three parts: the method comprises the steps of structure tree generation, three-dimensional milling template modeling and three-dimensional milling template detection. The structure tree generation mainly comprises the steps of ordering list information reading, digital-analog structure tree and design basis leading-in; the three-dimensional milling sample plate modeling mainly comprises sample plate profile design, sample plate lug design and sample plate reinforcing rib design; the three-dimensional chemical milling sample plate detection mainly comprises profile joint detection, chemical milling allowance line joint detection and the like.
The invention has the beneficial effects that:
(1) the invention is a design method of knowledge, standardization and parameterization, which can effectively improve the design quality and prevent errors;
(2) the invention can develop corresponding software in CATIA environment, and realize the rapid design of the three-dimensional chemical milling sample plate, thereby shortening the development period of the three-dimensional chemical milling sample plate.
Drawings
FIG. 1 is a flow chart of the present invention;
fig. 2 is a schematic diagram of calculation of a milling allowance line.
Detailed Description
Example 1:
a three-dimensional chemical milling sample plate rapid design method comprises structure tree generation, modeling of a three-dimensional chemical milling sample plate and detection of the three-dimensional chemical milling sample plate; the structure tree generation is used for generating a general assembly node, a part node and a standard component node in the CATIA and inputting corresponding material and standard component information; the three-dimensional milling sample plate modeling comprises sample plate profile design, sample plate lug piece design and sample plate reinforcing rib design which are sequentially carried out, wherein the sample plate lug piece design is that projection points are obtained on the side lines of the main body curved surface of the projection according to the intersection points of the hole axis of a die hole and the main body curved surface of the sample plate, so that a lug piece curve is generated, the lug piece curved surface is cut, and the lug piece curved surface is established.
The invention is a design method with knowledge, standardization and parameterization, which can effectively improve the design quality and prevent errors. The invention can develop corresponding software in CATIA environment, and realize the rapid design of the three-dimensional chemical milling sample plate, thereby shortening the development period of the three-dimensional chemical milling sample plate.
Example 2:
the method is optimized on the basis of embodiment 1, a hole axis A is generated by using a die hole, a point B is formed by intersecting a die film attaching surface S and the hole axis A in space, and the point B forms a point C on a main curved surface side line of a projection sample plate; forming a point D and a point F which are 30-40mm away from the point C on the sideline L of the main curved surface of the sample plate through a point command; cutting the main curved surface sideline L through a point D and a point E to form a curve DE; the curve DE translates 40mm at equal intervals on the die lamination surface S to form a curve FG; 4 end points of the connecting curve DE and the connecting curve FG form a wire frame H; projecting the wire frame H onto the die film attaching surface S to form a new wire frame M; and cutting the film pasting surface S of the die by using a wire frame M to obtain the three-dimensional milling sample plate lug curved surface.
Other parts of this embodiment are the same as embodiment 1, and thus are not described again.
Example 3:
in the embodiment, optimization is performed on the basis of the embodiment 1 or 2, and in the design of the profile of the sample plate, the surface of a die is cut according to the outline of a product to obtain the curved surface of the main body of the sample plate; and cutting off the chemical milling area of the curved surface of the sample plate main body according to the chemical milling allowance line.
Further, as shown in fig. 2, the formula for establishing the milling allowance line is as follows:
the formula of the primary chemical milling calculation is as follows:
B＝c×b
the quadratic chemical milling calculation formula is as follows:
wherein B is the width of the chemical milling allowance;
c is the corrosion coefficient;
a is the depth of the secondary chemical milling;
and b is the primary milling depth.
The rest of this embodiment is the same as embodiment 1 or 2, and therefore, the description thereof is omitted.
Example 4:
a method for rapidly designing a three-dimensional chemical milling template is shown in figure 1 and mainly comprises the following steps:
the method comprises the following steps: extracting order information from a file identified by a webpage or saved by the webpage, generating an assembly node according to the extracted information, importing mold digifax and other information, identifying mold lug hole position information, product appearance lines, chemical milling allowance lines and mold forming molded surfaces; generating a final assembly node, a part node, a standard component node and the like in the CATIA, and inputting corresponding materials and standard component information.
Step two: the modeling method of the three-dimensional milling sample plate main body curved surface comprises the following steps:
1) inputting an element to be cut (a die attaching surface) by using a cutting command in a curved surface design module, inputting a cutting-off element (a product outline), and cutting out a curved surface of a sample plate main body;
2) and inputting an element to be cut (a template main body curved surface), inputting a cutting element (a milling allowance line) and cutting off a milling area by using a cutting command in the curved surface design module.
3) The formula for establishing the milling allowance line is as follows:
the calculation method of the one-time milling is as shown in the formula (1).
B＝c×b (1)
5.5.2.3 the quadratic milling calculation method is as in formula (2).
In the formula:
b-milling allowance width in millimeters (mm);
c-corrosion coefficient;
a. b-milling depth in millimeters (mm).
Step three: the modeling method of the lug curved surface of the three-dimensional milling sample plate comprises the following steps:
generating a hole axis A by using a mold hole, and forming a point B by using the intersection of the mold film pasting surface S and the hole axis A in space, wherein the point B forms a point C on the side line of the main curved surface of the projection sample plate; according to the point command, forming a point D and a point F which are equidistant from the point C by 30-40mm on the edge line L of the main curved surface of the sample plate; cutting the main curved surface sideline L through a point D and a point E to form a curve DE; the curve DE translates 40mm at equal intervals on the die lamination surface S to form a curve FG; 4 end points of the connecting curve DE and the connecting curve FG form a wire frame H; projecting the wire frame H onto the die film attaching surface S to form a new wire frame M; and cutting the film pasting surface S of the die by using a wire frame M to obtain the three-dimensional milling sample plate lug curved surface.
Step four: solid modeling method for three-dimensional milling sample plate
1) Combining the template main body curved surface and the lug sheet curved surface by using a combination command;
2) generating a template three-dimensional digital-analog (thickness 5mm) by applying an equal-thickness surface command;
3) rounding the lug by a rounding command;
4) and pouring the bushing hole according to the hole axis and the size of the die hole by using a hole command.
Step five: the modeling method of the three-dimensional milling sample plate reinforcing rib comprises the following steps:
1) when the curve exceeds 800mm, reinforcing ribs need to be added, and 4 points with the spacing of 40mm are generated by using a point command;
2) generating a reinforcing rib sideline by using a linear command;
3) generating a reinforcing rib wire frame by applying a combination command;
4) generating a reinforcing rib curved surface by applying a cutting command;
5) and generating a template entity by using the thick surface name.
Step six: and carrying out three-dimensional labeling on the sample plate.
The invention is a design method with knowledge, standardization and parameterization, which can effectively improve the design quality and prevent errors. The invention can develop corresponding software in CATIA environment, and realize the rapid design of the three-dimensional chemical milling sample plate, thereby shortening the development period of the three-dimensional chemical milling sample plate.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and all simple modifications and equivalent variations of the above embodiments according to the technical spirit of the present invention are included in the scope of the present invention.
Claims (9)
1. A three-dimensional chemical milling sample plate rapid design method is characterized by comprising the steps of structure tree generation, modeling of a three-dimensional chemical milling sample plate and detection of the three-dimensional chemical milling sample plate; the structure tree generation is used for generating a general assembly node, a part node and a standard component node in the CATIA and inputting corresponding material and standard component information; the three-dimensional milling sample plate modeling comprises sample plate profile design, sample plate lug piece design and sample plate reinforcing rib design which are sequentially carried out, wherein the sample plate lug piece design is that projection points are obtained on the side lines of the main body curved surface of the projection according to the intersection points of the hole axis of a die hole and the main body curved surface of the sample plate, so that a lug piece curve is generated, the lug piece curved surface is cut, and the lug piece curved surface is established.
2. The method for rapidly designing the three-dimensional chemical milling template as claimed in claim 1, wherein in the template profile design, the die attaching surface is cut according to the outline of the product to obtain the curved surface of the template body; and cutting off the chemical milling area of the curved surface of the sample plate main body according to the chemical milling allowance line.
3. The method as claimed in claim 2, wherein the formula for establishing the milling allowance line is as follows:
the formula of the primary chemical milling calculation is as follows:
B＝c×b
the quadratic chemical milling calculation formula is as follows:
wherein B is the width of the chemical milling allowance;
c is the corrosion coefficient;
a is the depth of the secondary chemical milling;
and b is the primary milling depth.
4. The method for rapidly designing the three-dimensional chemical milling sample plate according to any one of claims 1 to 3, wherein a hole axis A is generated by using a die hole, a die film attaching surface S and the hole axis A are intersected in space to form a point B, and the point B forms a point C by projecting the edge line of the main curved surface of the sample plate; forming a point D and a point F which are 30-40mm away from the point C on the sideline L of the main curved surface of the sample plate through a point command; cutting the main curved surface sideline L through a point D and a point E to form a curve DE; the curve DE translates 40mm at equal intervals on the die lamination surface S to form a curve FG; 4 end points of the connecting curve DE and the connecting curve FG form a wire frame H; projecting the wire frame H onto the die film attaching surface S to form a new wire frame M; and cutting the film pasting surface S of the die by using a wire frame M to obtain the three-dimensional milling sample plate lug curved surface.
5. The method as claimed in claim 1, wherein the combination command is applied to combine the body curved surface and the tab curved surface of the template; generating a template three-dimensional digital model by applying an equal-thickness surface command; rounding the lug by a rounding command; and pouring the bushing hole according to the hole axis and the size of the die hole by using a hole command.
6. The method as claimed in claim 5, wherein in the design of the reinforcing ribs of the template, reinforcing ribs are added when the curve exceeds 800mm, and 4 points with a distance of 40mm are generated by using point commands; generating a reinforcing rib sideline by using a linear command; generating a reinforcing rib wire frame by applying a combination command; generating a reinforcing rib curved surface by applying a cutting command; and generating a template entity by using the thick surface name.
7. The method as claimed in claim 1, wherein the structure tree generation includes ordering list information reading, digital-analog structure tree, design basis importing; and extracting the order information from a file identified by a webpage or saved by the webpage, generating an assembly node according to the extracted information, importing mold digital-analog basis information, and identifying the mold lug hole position information, the product appearance line, the chemical milling allowance line and the mold forming molded surface.
8. The method as claimed in claim 1, wherein the stereolithography pattern inspection comprises a profile bonding inspection and a milling allowance line bonding inspection.
9. The method for rapidly designing the three-dimensional solid milling template as claimed in any one of claims 1, 7 and 8, wherein the modeling of the solid milling template mainly comprises the following steps:
step S100: inputting the outline of the product with the cutting elements, cutting the surface of the die to obtain the curved surface of the template main body,
step S200: inputting a cutting element milling allowance line, and cutting a milling area of the curved surface of the sample plate main body;
step S300: modeling the curved surface of the sample plate lug plate: generating a hole axis A by using a mold hole, and forming a point B by using the intersection of the mold film pasting surface S and the hole axis A in space, wherein the point B forms a point C on the side line of the main curved surface of the projection sample plate; forming a point D and a point F which are 30-40mm away from the point C on the sideline L of the main curved surface of the sample plate through a point command; cutting the main curved surface sideline L through a point D and a point E to form a curve DE; the curve DE translates 40mm at equal intervals on the die lamination surface S to form a curve FG; 4 end points of the connecting curve DE and the connecting curve FG form a wire frame H; projecting the wire frame H onto the die film attaching surface S to form a new wire frame M; cutting the die film surface S by using a wire frame M to obtain a three-dimensional milling sample plate lug curved surface;
step S400: modeling a template entity: combining the template main body curved surface and the lug sheet curved surface by using a combination command; generating a template three-dimensional digital model by applying an equal-thickness surface command; rounding the lug by a rounding command; pouring a bushing hole according to the hole axis and the size of the die hole by using a hole command;
step S500: modeling a sample plate reinforcing rib: when the curve exceeds 800mm, reinforcing ribs need to be added, and 4 points with the spacing of 40mm are generated by using a point command; generating a reinforcing rib sideline by using a linear command; generating a reinforcing rib wire frame by applying a combination command; generating a reinforcing rib curved surface by applying a cutting command; and generating a template entity by using the thick surface name.
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