CN112580154A - Automobile stamping part modeling method based on CATIA software - Google Patents
Automobile stamping part modeling method based on CATIA software Download PDFInfo
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Abstract
A modeling method of an automobile stamping part based on CATIA software comprises the following steps: the first step is as follows: manufacturing an uncut dough sheet; the second step is that: cutting a dough sheet; the third step: sewing the cut dough sheet; the fourth step: manufacturing a chamfer; the fifth step: punching; and a sixth step: and thickening to finally obtain a model of the stamping part, and completing modeling. The design not only standardizes the modeling process, has clear modeling flow, simple operation and easy learning, effectively improves the modeling efficiency, but also has standard storage and effectively improves the modification efficiency.
Description
Technical Field
The invention relates to a modeling method of an automobile stamping part based on CATIA software, which is particularly suitable for improving the design efficiency of modeling and modifying a stamping part model.
Background
The automobile parts are various in types and quantity, the automobile body-in-white is a foundation for mounting other parts, the body-in-white is also a main part of an outer model and is a part which is frequently changed in automobile modification, and most of the body-in-white is formed by stamping parts. The automobile type design stage is many, and the design time is long (generally 2 years from commodity concept to design drawing release), and automobile parts arranges compactly, and the design scheme needs often to adjust. In order to adapt to the white body design condition, the good modeling method of the automobile stamping part is not only fast in modeling, but also convenient to modify.
The CATIA is design software adopted by most automobile manufacturers, and the good CATIA automobile stamping part modeling method is very helpful for improving the design efficiency.
Disclosure of Invention
The invention aims to solve the problem of low design efficiency in the prior art, and provides a modeling method for an automobile stamping part based on CATIA software, which is used for improving the design efficiency.
In order to achieve the above purpose, the technical solution of the invention is as follows:
a modeling method of an automobile stamping part based on CATIA software comprises the following steps:
the first step is as follows: making uncut patches, and obtaining a patch set corresponding to the stamping part to be modeled by using various patch generation commands according to the shape and size relationship of the stamping part to be modeled in CATIA software, wherein a single patch has an intersection relationship with at least one adjacent patch;
the second step is that: cutting the surface patches, adjusting software into a non-association operation mode, and then cutting redundant surface patches at the intersection of the surface patches and surface patches at the edges of the surface patches according to the shape of the stamping part to be modeled in the non-association operation mode to obtain a cut surface patch set;
the third step: sewing the cut dough sheets, adjusting software into a related operation mode, sewing the cut dough sheet set obtained in the second step in a related operation mode, and sewing the intersection parts of all the adjacent dough sheets until all the dough sheets form a connected whole, and obtaining the connected whole of all the dough sheets at the moment;
the fourth step: manufacturing a chamfer, connecting all the surface patches obtained in the third step into a whole, chamfering, and performing chamfer design on the intersection of all the adjacent surface patches according to the structural characteristics of the stamping part to be modeled to obtain the chamfered surface patch whole;
the fifth step: punching, namely, if the stamping part to be modeled needs to be punched, punching the whole chamfer surface piece obtained in the fourth step, and punching on the corresponding surface piece according to the punching requirement of the modeled stamping part to obtain the whole punched surface piece;
if the stamping part to be modeled does not need to be punched, directly entering the next step;
and a sixth step: thickening, the whole chamfer dough sheet that obtains in the fourth step or the whole dough sheet that punches that obtains in the fifth step are thickened the operation, thicken different dough sheets in the equidirectional according to the material thickness of the stamping workpiece of waiting to model, obtain the model of stamping workpiece this moment, and the modeling is accomplished.
The casting die modeling method further comprises a storage step and an organization classification method:
in a first step: first, an overall geometric feature set is created, and then sub-geometric feature sets are created within the overall geometric feature set: storing the surface patch set corresponding to the stamping part to be modeled obtained in the first step into an uncut surface patch geometric feature set in a total geometric feature set inner surface feature set, and storing the reference features of the surface patch set corresponding to the stamping part to be modeled into a reference element geometric feature set in the total geometric feature set inner surface geometric feature set;
in a second step: storing the clipped patch set obtained in the second step into a clipped patch geometric feature set in a surface body geometric feature set in the total geometric feature set;
in a third step: all the patches obtained in the third step are connected and integrally stored into a chamfering geometric feature set in the total geometric feature set;
in the fourth step: integrally storing the chamfer patches obtained in the fourth step into a chamfer geometric feature set in the total geometric feature set;
in the fifth step: integrally storing the punched surface patches obtained in the fifth step into a trimming and hole cutting geometric feature set in the total geometric feature set;
in the sixth step: and storing the model of the stamping part obtained in the sixth step into the part geometry in the total geometric feature set.
The compression element modeling method further includes a seventh step of: modifying, when the shape of a certain patch needs to be modified, modifying the patch to be modified and the adjacent related patch to be modified in the geometric feature set of the clipped patch in a non-associated operation mode:
storing the modified surface patch and the related surface patch to be modified to the lowest part in a trimming surface folder in a surface body folder in the geometric feature set; deleting the initial modified surface patch without deleting the stitched surface patch of the initial modified surface patch, copying a cut associated surface patch to be modified, deleting the associated surface patch to be modified, and not deleting the stitched surface patch of the associated surface patch to be modified;
and restoring the cut related patch to be modified to an uncut state, and cutting again to obtain the cut patch to be modified.
In the seventh step: when the original modified surface patch is deleted, the stitched surface patch of the surface patch does not need to be deleted;
when the associated patch needing to be modified is deleted, all the stitched patches of the associated patch needing to be modified do not need to be deleted.
In the seventh step: when a new patch is needed to be added, the newly added patch which is not cut is cut in the geometric feature set of the cut patch, the associated patch which needs to be modified is copied, the copied patch is restored to the uncut state and then is cut again, the associated patch which needs to be modified is deleted, and the stitched patch of the associated patch which needs to be modified is not deleted.
In the seventh step: when a certain patch needs to be deleted, deleting the patch needing to be deleted in the geometric feature set of the clipped patch, copying the associated patch needing to be modified, re-clipping the copied patch after the copied patch is restored to an uncut state, deleting the associated patch needing to be modified, and not deleting the stitched patch of the associated patch needing to be modified.
In the seventh step: the cut dough sheets are added into the sewn dough sheets, errors can be reported in the chamfering process due to the fact that the dough sheets contained in the sewn dough sheets are deleted and added, and the digital-analog modification is completed by re-editing the error-reported chamfers.
In a third step: when the cut surface patch is sewed, the sewing precision is a system default value;
in the fifth step: when punching, the size of the punched hole needs to be rounded to one position behind the decimal point, and the central coordinate of the punched hole is rounded to one position behind the decimal point at least in two directions.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the modeling method of the automobile stamping part based on the CATIA software, the steps of manufacturing an uncut surface piece, cutting the surface piece, sewing the cut surface piece, manufacturing the chamfer, punching and thickening are performed, so that the modeling process is standardized, the modeling flow is clear, the operation is simple, the learning is easy, the modeling efficiency of a designer can be effectively improved, and the design cost is effectively reduced. Therefore, the design modeling process is standardized, the modeling process is clear, the operation is simple, the learning is easy, and the modeling efficiency is effectively improved.
2. According to the automobile stamping part modeling method based on CATIA software, the designed finished products completed in each step are subjected to standard storage management, corresponding files in the geometric feature set are directly called for modification when the design needs to be modified, the modification is convenient, and the design efficiency of the automobile stamping part can be greatly improved. Therefore, the design stores the standard and effectively improves the modification efficiency.
Drawings
FIG. 1 is a schematic diagram of the modeling steps of the present invention.
FIG. 2 is a schematic diagram of a geometry feature set structure tree according to the present invention.
Fig. 3 is a schematic diagram of a collection of patches that are not clipped in the first step of the present invention.
FIG. 4 is a diagram of a patch collection after clipping in the second step of the present invention.
Fig. 5 is a schematic diagram of the connected ensemble of all patches in the third step of the present invention.
Fig. 6 is a schematic view of the whole chamfered surface piece in the fourth step of the present invention.
Fig. 7 is a schematic diagram of the entirety of a punched patch in the fifth step of the present invention.
Fig. 8 is a schematic representation of a pattern for stamping in a sixth step of the invention.
Detailed Description
The present invention will be described in further detail with reference to the following description and embodiments in conjunction with the accompanying drawings.
Referring to fig. 1 to 8, a method for modeling an automobile stamping part based on CATIA software includes the following steps:
the first step is as follows: making uncut patches, and obtaining a patch set corresponding to the stamping part to be modeled by using various patch generation commands according to the shape and size relationship of the stamping part to be modeled in CATIA software, wherein a single patch has an intersection relationship with at least one adjacent patch;
the second step is that: cutting the surface patches, adjusting software into a non-association operation mode, and then cutting redundant surface patches at the intersection of the surface patches and surface patches at the edges of the surface patches according to the shape of the stamping part to be modeled in the non-association operation mode to obtain a cut surface patch set;
the third step: sewing the cut dough sheets, adjusting software into a related operation mode, sewing the cut dough sheet set obtained in the second step in a related operation mode, and sewing the intersection parts of all the adjacent dough sheets until all the dough sheets form a connected whole, and obtaining the connected whole of all the dough sheets at the moment;
the fourth step: manufacturing a chamfer, connecting all the surface patches obtained in the third step into a whole, chamfering, and performing chamfer design on the intersection of all the adjacent surface patches according to the structural characteristics of the stamping part to be modeled to obtain the chamfered surface patch whole;
the fifth step: punching, namely, if the stamping part to be modeled needs to be punched, punching the whole chamfer surface piece obtained in the fourth step, and punching on the corresponding surface piece according to the punching requirement of the modeled stamping part to obtain the whole punched surface piece;
if the stamping part to be modeled does not need to be punched, directly entering the next step;
and a sixth step: thickening, the whole chamfer dough sheet that obtains in the fourth step or the whole dough sheet that punches that obtains in the fifth step are thickened the operation, thicken different dough sheets in the equidirectional according to the material thickness of the stamping workpiece of waiting to model, obtain the model of stamping workpiece this moment, and the modeling is accomplished.
The casting die modeling method further comprises a storage step and an organization classification method:
in a first step: first, an overall geometric feature set is created, and then sub-geometric feature sets are created within the overall geometric feature set: storing the surface patch set corresponding to the stamping part to be modeled obtained in the first step into an uncut surface patch geometric feature set in a total geometric feature set inner surface feature set, and storing the reference features of the surface patch set corresponding to the stamping part to be modeled into a reference element geometric feature set in the total geometric feature set inner surface geometric feature set;
in a second step: storing the clipped patch set obtained in the second step into a clipped patch geometric feature set in a surface body geometric feature set in the total geometric feature set;
in a third step: all the patches obtained in the third step are connected and integrally stored into a chamfering geometric feature set in the total geometric feature set;
in the fourth step: integrally storing the chamfer patches obtained in the fourth step into a chamfer geometric feature set in the total geometric feature set;
in the fifth step: integrally storing the punched surface patches obtained in the fifth step into a trimming and hole cutting geometric feature set in the total geometric feature set;
in the sixth step: and storing the model of the stamping part obtained in the sixth step into the part geometry in the total geometric feature set.
The compression element modeling method further includes a seventh step of: modifying, when the shape of a certain patch needs to be modified, modifying the patch to be modified and the adjacent related patch to be modified in the geometric feature set of the clipped patch in a non-associated operation mode:
storing the modified surface patch and the related surface patch to be modified to the lowest part in a trimming surface folder in a surface body folder in the geometric feature set; deleting the initial modified surface patch without deleting the stitched surface patch of the initial modified surface patch, copying a cut associated surface patch to be modified, deleting the associated surface patch to be modified, and not deleting the stitched surface patch of the associated surface patch to be modified;
and restoring the cut related patch to be modified to an uncut state, and cutting again to obtain the cut patch to be modified.
In the seventh step: when the original modified surface patch is deleted, the stitched surface patch of the surface patch does not need to be deleted;
when the associated patch needing to be modified is deleted, all the stitched patches of the associated patch needing to be modified do not need to be deleted.
In the seventh step: when a new patch is needed to be added, the newly added patch which is not cut is cut in the geometric feature set of the cut patch, the associated patch which needs to be modified is copied, the copied patch is restored to the uncut state and then is cut again, the associated patch which needs to be modified is deleted, and the stitched patch of the associated patch which needs to be modified is not deleted.
In the seventh step: when a certain patch needs to be deleted, deleting the patch needing to be deleted in the geometric feature set of the clipped patch, copying the associated patch needing to be modified, re-clipping the copied patch after the copied patch is restored to an uncut state, deleting the associated patch needing to be modified, and not deleting the stitched patch of the associated patch needing to be modified.
In the seventh step: the cut dough sheets are added into the sewn dough sheets, errors can be reported in the chamfering process due to the fact that the dough sheets contained in the sewn dough sheets are deleted and added, and the digital-analog modification is completed by re-editing the error-reported chamfers.
In a third step: when the cut surface patch is sewed, the sewing precision is a system default value;
in the fifth step: when punching, the size of the punched hole needs to be rounded to one position behind the decimal point, and the central coordinate of the punched hole is rounded to one position behind the decimal point at least in two directions.
The principle of the invention is illustrated as follows:
in the fifth step: when punching, the size of the punched hole must be round, and the center coordinate of the hole must be round in at least 2 directions. Rounding means that the value of the coordinates is accurate to one digit after the decimal point. Because the design precision of the automobile body stamping part is 1 position behind the decimal point, the size of the punched hole must be at least rounded to one position behind the decimal point on a space plane which is not parallel to the reference coordinate plane, and the central coordinate of the hole must be at least rounded to one position behind the decimal point in 2 directions.
In fig. 2: CATIA's Modeling Method is a total geometric feature set; surface is the surface volume geometric feature set; filelet is a chamfer geometric feature set; split is a geometric feature set of the edge cutting hole; the uniform surface is a geometric feature set of an uncut patch; the reference element is a geometric feature set of the reference element; the trimmed surface is a geometric feature set of a cutting patch; PartBody is the part geometry.
Example 1:
a modeling method of an automobile stamping part based on CATIA software comprises the following steps:
the first step is as follows: making uncut patches, and obtaining a patch set corresponding to the stamping part to be modeled by using various patch generation commands according to the shape and size relationship of the stamping part to be modeled in CATIA software, wherein a single patch has an intersection relationship with at least one adjacent patch;
the second step is that: cutting the surface patches, adjusting software into a non-association operation mode, and then cutting redundant surface patches at the intersection of the surface patches and surface patches at the edges of the surface patches according to the shape of the stamping part to be modeled in the non-association operation mode to obtain a cut surface patch set;
the third step: sewing the cut dough sheets, adjusting software into a related operation mode, sewing the cut dough sheet set obtained in the second step in a related operation mode, and sewing the intersection parts of all the adjacent dough sheets until all the dough sheets form a connected whole, and obtaining the connected whole of all the dough sheets at the moment; when the cut surface patch is sewed, the sewing precision is a system default value;
the fourth step: manufacturing a chamfer, connecting all the surface patches obtained in the third step into a whole, chamfering, and performing chamfer design on the intersection of all the adjacent surface patches according to the structural characteristics of the stamping part to be modeled to obtain the chamfered surface patch whole;
the fifth step: punching, namely, if the stamping part to be modeled needs to be punched, punching the whole chamfer surface piece obtained in the fourth step, punching on the corresponding surface piece according to the punching requirement of the modeled stamping part, wherein the size of the punched hole needs to be rounded to one position behind a decimal point, the central coordinate of the punched hole is rounded to one position behind the decimal point in at least two directions, and the whole punched surface piece is obtained at the moment;
if the stamping part to be modeled does not need to be punched, directly entering the next step;
and a sixth step: thickening, the whole chamfer dough sheet that obtains in the fourth step or the whole dough sheet that punches that obtains in the fifth step are thickened the operation, thicken different dough sheets in the equidirectional according to the material thickness of the stamping workpiece of waiting to model, obtain the model of stamping workpiece this moment, and the modeling is accomplished.
Example 2:
example 2 is substantially the same as example 1 except that:
the casting die modeling method further comprises a storage step and an organization classification method:
in a first step: first, an overall geometric feature set is created, and then sub-geometric feature sets are created within the overall geometric feature set: storing the surface patch set corresponding to the stamping part to be modeled obtained in the first step into an uncut surface patch geometric feature set in a total geometric feature set inner surface feature set, and storing the reference features of the surface patch set corresponding to the stamping part to be modeled into a reference element geometric feature set in the total geometric feature set inner surface geometric feature set;
in a second step: storing the clipped patch set obtained in the second step into a clipped patch geometric feature set in a surface body geometric feature set in the total geometric feature set;
in a third step: all the patches obtained in the third step are connected and integrally stored into a chamfering geometric feature set in the total geometric feature set;
in the fourth step: integrally storing the chamfer patches obtained in the fourth step into a chamfer geometric feature set in the total geometric feature set;
in the fifth step: integrally storing the punched surface patches obtained in the fifth step into a trimming and hole cutting geometric feature set in the total geometric feature set;
in the sixth step: and storing the model of the stamping part obtained in the sixth step into the part geometry in the total geometric feature set.
Example 3:
example 3 is substantially the same as example 2 except that:
the compression element modeling method further includes a seventh step of: modifying, when the shape of a certain patch needs to be modified, modifying the patch to be modified and the adjacent related patch to be modified in the geometric feature set of the clipped patch in a non-associated operation mode:
storing the modified surface patch and the related surface patch to be modified to the lowest part in a trimming surface folder in a surface body folder in the geometric feature set; deleting the initial modified surface patch without deleting the stitched surface patch of the initial modified surface patch, copying a cut associated surface patch to be modified, deleting the associated surface patch to be modified, and not deleting the stitched surface patch of the associated surface patch to be modified;
and restoring the cut related patch to be modified to an uncut state, and cutting again to obtain the cut patch to be modified.
In the seventh step: when the original modified surface patch is deleted, the stitched surface patch of the surface patch does not need to be deleted;
when the associated patch needing to be modified is deleted, all the stitched patches of the associated patch needing to be modified do not need to be deleted.
In the seventh step: when a new patch is needed to be added, the newly added patch which is not cut is cut in the geometric feature set of the cut patch, the associated patch which needs to be modified is copied, the copied patch is restored to the uncut state and then is cut again, the associated patch which needs to be modified is deleted, and the stitched patch of the associated patch which needs to be modified is not deleted.
In the seventh step: when a certain patch needs to be deleted, deleting the patch needing to be deleted in the geometric feature set of the clipped patch, copying the associated patch needing to be modified, re-clipping the copied patch after the copied patch is restored to an uncut state, deleting the associated patch needing to be modified, and not deleting the stitched patch of the associated patch needing to be modified.
In the seventh step: the cut dough sheets are added into the sewn dough sheets, errors can be reported in the chamfering process due to the fact that the dough sheets contained in the sewn dough sheets are deleted and added, and the digital-analog modification is completed by re-editing the error-reported chamfers.
Claims (8)
1. A modeling method of an automobile stamping part based on CATIA software is characterized in that:
the casting die modeling method comprises the following steps:
the first step is as follows: making uncut patches, and obtaining a patch set corresponding to the stamping part to be modeled by using various patch generation commands according to the shape and size relationship of the stamping part to be modeled in CATIA software, wherein a single patch has an intersection relationship with at least one adjacent patch;
the second step is that: cutting the surface patches, adjusting software into a non-association operation mode, and then cutting redundant surface patches at the intersection of the surface patches and surface patches at the edges of the surface patches according to the shape of the stamping part to be modeled in the non-association operation mode to obtain a cut surface patch set;
the third step: sewing the cut dough sheets, adjusting software into a related operation mode, sewing the cut dough sheet set obtained in the second step in a related operation mode, and sewing the intersection parts of all the adjacent dough sheets until all the dough sheets form a connected whole, and obtaining the connected whole of all the dough sheets at the moment;
the fourth step: manufacturing a chamfer, connecting all the surface patches obtained in the third step into a whole, chamfering, and performing chamfer design on the intersection of all the adjacent surface patches according to the structural characteristics of the stamping part to be modeled to obtain the chamfered surface patch whole;
the fifth step: punching, namely, if the stamping part to be modeled needs to be punched, punching the whole chamfer surface piece obtained in the fourth step, and punching on the corresponding surface piece according to the punching requirement of the modeled stamping part to obtain the whole punched surface piece;
if the stamping part to be modeled does not need to be punched, directly entering the next step;
and a sixth step: thickening, the whole chamfer dough sheet that obtains in the fourth step or the whole dough sheet that punches that obtains in the fifth step are thickened the operation, thicken different dough sheets in the equidirectional according to the material thickness of the stamping workpiece of waiting to model, obtain the model of stamping workpiece this moment, and the modeling is accomplished.
2. The CATIA software-based automobile stamping part modeling method according to claim 1, characterized in that:
the casting die modeling method further comprises a storage step and an organization classification method:
in a first step: first, an overall geometric feature set is created, and then sub-geometric feature sets are created within the overall geometric feature set: storing the surface patch set corresponding to the stamping part to be modeled obtained in the first step into an uncut surface patch geometric feature set in a total geometric feature set inner surface feature set, and storing the reference features of the surface patch set corresponding to the stamping part to be modeled into a reference element geometric feature set in the total geometric feature set inner surface geometric feature set;
in a second step: storing the clipped patch set obtained in the second step into a clipped patch geometric feature set in a surface body geometric feature set in the total geometric feature set;
in a third step: all the patches obtained in the third step are connected and integrally stored into a chamfering geometric feature set in the total geometric feature set;
in the fourth step: integrally storing the chamfer patches obtained in the fourth step into a chamfer geometric feature set in the total geometric feature set;
in the fifth step: integrally storing the punched surface patches obtained in the fifth step into a trimming and hole cutting geometric feature set in the total geometric feature set;
in the sixth step: and storing the model of the stamping part obtained in the sixth step into the part geometry in the total geometric feature set.
3. The CATIA software-based automobile stamping part modeling method according to claim 2, characterized in that:
the compression element modeling method further includes a seventh step of: modifying, when the shape of a certain patch needs to be modified, modifying the patch to be modified and the adjacent related patch to be modified in the geometric feature set of the clipped patch in a non-associated operation mode:
storing the modified surface patch and the related surface patch to be modified to the lowest part in a trimming surface folder in a surface body folder in the geometric feature set; deleting the initial modified surface patch without deleting the stitched surface patch of the initial modified surface patch, copying a cut associated surface patch to be modified, deleting the associated surface patch to be modified, and not deleting the stitched surface patch of the associated surface patch to be modified;
and restoring the cut related patch to be modified to an uncut state, and cutting again to obtain the cut patch to be modified.
4. The CATIA software-based automobile stamping part modeling method according to claim 3, characterized in that:
in the seventh step: when the original modified surface patch is deleted, the stitched surface patch of the surface patch does not need to be deleted;
when the associated patch needing to be modified is deleted, all the stitched patches of the associated patch needing to be modified do not need to be deleted.
5. The CATIA software-based automobile stamping part modeling method according to claim 3, characterized in that:
in the seventh step: when a new patch is needed to be added, the newly added patch which is not cut is cut in the geometric feature set of the cut patch, the associated patch which needs to be modified is copied, the copied patch is restored to the uncut state and then is cut again, the associated patch which needs to be modified is deleted, and the stitched patch of the associated patch which needs to be modified is not deleted.
6. The CATIA software-based automobile stamping part modeling method according to claim 3, characterized in that:
in the seventh step: when a certain patch needs to be deleted, deleting the patch needing to be deleted in the geometric feature set of the clipped patch, copying the associated patch needing to be modified, re-clipping the copied patch after the copied patch is restored to an uncut state, deleting the associated patch needing to be modified, and not deleting the stitched patch of the associated patch needing to be modified.
7. The automobile stamping part modeling method based on the CATIA software according to any one of claims 5-6, characterized in that:
in the seventh step: the cut dough sheets are added into the sewn dough sheets, errors can be reported in the chamfering process due to the fact that the dough sheets contained in the sewn dough sheets are deleted and added, and the digital-analog modification is completed by re-editing the error-reported chamfers.
8. The CATIA software-based automobile stamping part modeling method according to claim 7, characterized in that:
in a third step: when the cut surface patch is sewed, the sewing precision is a system default value;
in the fifth step: when punching, the size of the punched hole needs to be rounded to one position behind the decimal point, and the central coordinate of the punched hole is rounded to one position behind the decimal point at least in two directions.
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