Ground mat simple mold modeling method and system based on CATIA software

Abstract

The invention relates to the technical field of automobile ground mats, in particular to a ground mat simple mold modeling method and system based on CATIA software, firstly, a site mold basic template is designed, secondly, the reverse surface of a carpet serves as a basic surface, and parameterization is achieved through operations such as deviation and segmentation of other mold surfaces and the basic surface. According to the method, the mold boundary is used as the initial model to be stored in the model library, when ground mat molds of different vehicle models are designed, re-drawing is not needed, only the mold boundary parameters need to be adjusted to adapt to products of different sizes, and the design time is saved. A basic surface, a cutting surface, a boundary surface and the like can be distinguished through clear modeling steps, and the digital-analog design efficiency is effectively improved. The boundary surface and the outer surface of the mold are all strictly obtained from a reverse basic surface through offset and trimming, parameterization of digital-analog modification is facilitated, and the development efficiency of the ground mat mold is improved. The modeling method can also be suitable for modeling of similar products and is wide in application range.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile floor mats, and in particular to a method and system for modeling a simple mold for a floor mat based on CATIA software. Background Art

[0002] With the development of the automobile market, the types of vehicles and the number of consumers have increased dramatically, and there are more and more personalized demands for automobiles. Some customers use floor mats to avoid the dirt in the car that is difficult to clean. There are also services in the aftermarket where 4S stores give away floor mats. The development of automobile floor mats has also become one of the rigid services in the aftermarket. Automobile floor mats are waterproof and non-slip mats installed on the car carpet. Because there are many types of automobile products, the cost of special floor mat molds is high and the investment is expensive. Many manufacturers cannot afford the investment cost of special floor mat molds for matching car models. Therefore, most floor mat molds are usually completed by stamping and welding.

[0003] Due to the particularity of floor mat design, there is generally no vehicle data during design. There is currently no proprietary floor mat modeling method. The conventional floor mat modeling method is based on the CATIA modeling idea, through carpet point cloud reverse, offset entity, and finally through the trimming entity, the floor mat boundary, bottom surface and mold modeling are completed respectively. Specifically, create the carpet reverse surface according to the point cloud and trim it, and then generate the entity; select the boundary according to the size requirements to create the mold boundary entity; create the mold boundary surface entity; mold post-processing; complete the mold digital model.

[0004] Because the actual vehicle state is likely to have large deviations, certain trial molds and adjustments are required to better match the actual vehicle. Therefore, this modeling method of reverse engineering the point cloud and then separately designing the mold for each part has poor modification convenience and low efficiency. Summary of the invention

[0005] The purpose of the present invention is to provide a method and system for modeling a simple mold for a floor mat based on CATIA software, which can solve the technical problems of poor modification convenience and low efficiency of the existing floor mat modeling method.

[0006] To achieve the above object, the technical solution of the present invention is as follows:

[0007] The present invention designs a simple mold modeling method for floor mats based on CATIA software, which includes the following steps:

[0008] Establish parameterized initial mold boundary;

[0009] Import scanned carpet point cloud data;

[0010] Establish coordinate axes according to carpet features and move them to the initial mold boundary with parameters through coordinate transformation;

[0011] Adjust the initial mold boundary size with parameters according to the shape of the carpet point cloud, and reversely establish the base surface of the floor mat mold bottom surface;

[0012] Trimming the base surface of the bottom surface of the floor mat mold to obtain a solid body of the bottom surface of the floor mat mold;

[0013] According to the carpet point cloud boundary, make the base surface of the floor mat mold boundary;

[0014] Using a dedicated boundary clipping surface to trim the boundary base surface of the floor mat mold to obtain an upper boundary surface of the floor mat mold;

[0015] The upper boundary surface of the floor mat mold is offset to obtain a clipping surface of the bottom surface of the floor mat mold, and the clipping surface is used to trim the initial mold boundary with parameters to obtain the overall boundary entity of the floor mat mold;

[0016] Combine the bottom surface entity of the floor mat mold with the overall boundary entity of the floor mat mold to complete the entity modeling of the floor mat mold.

[0017] As a preferred solution, the method for making the parameterized initial mold boundary is as follows:

[0018] Taking the initial coordinates of CATIA software as the reference, the XZ plane is offset to the left and right respectively, and the YZ plane is offset to the front and back respectively;

[0019] Draw the initial mold boundary surface by offsetting upwards based on the XY plane;

[0020] Based on the offset surface parameter of the XY plane, change the Y and Z values ​​of the parameter to create the floor mat transformation coordinate axis.

[0021] As a preferred solution, when reverse engineering the foundation surface of the bottom surface of the floor mat mold, intersection margins need to be reserved for overlapping foundation surfaces for subsequent parameter adjustments.

[0022] As a preferred solution, when making the base surface of the floor mat mold boundary, a margin is reserved for the overlapping part of the parts to ensure that the carpet boundary is not exposed.

[0023] As a preferred solution, the dedicated boundary cutting surface is made by the bottom surface of the floor mat mold and the seat rail extraction surface.

[0024] The present invention also designs a simple mold modeling system for floor mats based on CATIA software, which includes the following modules:

[0025] Initial mold boundary module, used to establish parameterized initial mold boundary;

[0026] Carpet point cloud import module, used to import scanned carpet point cloud data;

[0027] A coordinate transformation module, used to establish a coordinate axis according to the carpet features and move it to the initial mold boundary with parameters through coordinate transformation;

[0028] The base surface establishment module of the floor mat bottom surface is used to adjust the initial mold boundary size with parameters according to the shape of the carpet point cloud, and reversely establish the base surface of the bottom surface of the floor mat mold;

[0029] A floor mat mold bottom surface establishment module is used to trim the base surface of the floor mat mold bottom surface to obtain the floor mat mold bottom surface entity;

[0030] The floor mat boundary base surface establishment module is used to make the floor mat mold boundary base surface according to the carpet point cloud boundary;

[0031] A floor mat mold upper boundary surface establishment module, which is used to trim the floor mat mold boundary base surface using a dedicated boundary clipping surface to obtain the floor mat mold upper boundary surface;

[0032] A floor mat mold overall boundary entity establishment module is used to offset the upper boundary surface of the floor mat mold to obtain a clipping surface of the bottom surface of the floor mat mold, and use the clipping surface to trim the initial mold boundary with parameters to obtain the overall boundary entity of the floor mat mold;

[0033] The floor mat mold entity establishment module is used to combine the floor mat mold bottom surface entity with the floor mat mold overall boundary entity to complete the floor mat mold entity modeling.

[0034] Beneficial effects of the present invention:

[0035] The present invention provides a method and system for modeling a simple mold for a floor mat based on CATIA software.

[0036] 1. The present invention stores the boundary of the floor mat mold as an initial model in the model library. When designing floor mat molds for different car models, there is no need to re-draw the model. Only the mold boundary parameters need to be adjusted to adapt to products of different sizes, thus saving design time.

[0037] 2. The present invention can distinguish the base surface, cutting surface, boundary surface, etc. through clear modeling steps, thereby effectively improving the efficiency of digital model design.

[0038] 3. The outer surfaces of the boundary surfaces of the mold of the present invention are all strictly obtained by offsetting and trimming the reverse base surface, which is conducive to the parameterization of digital model modification and can also be applied to the modeling of similar products, with a wide range of applications.

[0039] The present invention can solve the technical problems of poor modification convenience and low efficiency of the existing floor mat modeling method. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 A schematic diagram of a parameterized mold boundary feature surface template created in the present invention;

[0041] Figure 2 This is a schematic diagram of importing scanned carpet point cloud in the present invention;

[0042] Figure 3 Establishing coordinate axes for the carpet features of the present invention and transforming them to the mold schematic diagram;

[0043] Figure 4 It is a schematic diagram of the base surface of the bottom surface of the reverse driver and passenger floor mats in the present invention;

[0044] Figure 5 It is a schematic diagram of the bottom surface of the mold after trimming in the present invention;

[0045] Figure 6 This is a schematic diagram of the boundary base surface of the mold of the present invention;

[0046] Figure 7 It is a schematic diagram of the boundary cutting surface of the present invention;

[0047] Figure 8 This is a schematic diagram of mold boundary trimming of the present invention;

[0048] Fig. 9 This is a schematic diagram of cutting the side wall of the mold on the upper surface of the mold of the present invention;

[0049] Fig.10 This is a schematic diagram of the final effect of the floor mat mold.

[0050] Fig.11 It is a flow chart of the present invention. DETAILED DESCRIPTION

[0051] In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved clearer, the technical solutions of the present invention are further described below in conjunction with the accompanying drawings and through specific implementation methods. It is understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for the convenience of description, only the parts related to the present invention are shown in the accompanying drawings, not all.

[0052] The present invention relates to a simple mold modeling method and system for floor mats based on CATIA software, which can improve the development efficiency of floor mat products. The present invention provides a reasonable modeling step, firstly designing a floor mold basic template, then taking the reverse surface of the carpet as the base surface, and parameterizing the remaining mold surfaces through operations such as offset and segmentation with the base surface, thereby improving the development efficiency of floor mat molds.

[0053] The present invention stores the mold boundary as the initial model in the model library. When designing floor mat molds for different models, there is no need to re-draw the model. It is only necessary to adjust the mold boundary parameters to adapt to products of different sizes, which saves design time. The base surface, cutting surface, boundary surface, etc. can be distinguished through clear modeling steps, which effectively improves the efficiency of digital model design. The mold boundary surface and the outer surface are all strictly obtained by offsetting and trimming the reverse base surface, which is conducive to the parameterization of digital model modification. It can also be applied to the modeling of similar products, with a wide range of applications.

[0054] A simple mold modeling method for floor mats based on CATIA software includes the following steps:

[0055] Establish parameterized initial mold boundary;

[0056] Import scanned carpet point cloud data;

[0057] Establish coordinate axes according to carpet features and move them to the initial mold boundary with parameters through coordinate transformation;

[0058] According to the shape of the carpet point cloud, the initial mold boundary size with parameters is adjusted, and the base surface of the bottom surface of the floor mat mold is reversely established; when the base surface of the bottom surface of the floor mat mold is reversely established, the intersection margin of the overlapping base surfaces needs to be reserved for subsequent parameter adjustment.

[0059] Trimming the base surface of the bottom surface of the floor mat mold to obtain the bottom surface of the floor mat mold;

[0060] According to the boundary of the carpet point cloud, the boundary base surface of the floor mat mold is made; when making the boundary base surface of the floor mat mold, a margin is reserved with the overlapping part of the parts to ensure that the carpet boundary is not exposed.

[0061] The floor mat mold boundary base surface is trimmed by using a special boundary cutting surface to obtain the upper boundary surface of the floor mat mold; the special boundary cutting surface is made by extracting the bottom surface of the floor mat mold and the seat rail.

[0062] The upper boundary surface of the floor mat mold is offset to obtain a clipping surface of the bottom surface of the floor mat mold, and the clipping surface is used to trim the initial mold boundary with parameters to obtain the overall boundary entity of the floor mat mold;

[0063] The dedicated boundary clipping surface is used to trim the overall boundary entity of the floor mat mold to complete the entity modeling of the floor mat mold.

[0064] The method for making the parameterized initial mold boundary is as follows:

[0065] Taking the initial coordinates of CATIA software as the reference, the XZ plane is offset to the left and right respectively, and the YZ plane is offset to the front and back respectively;

[0066] Draw the initial mold boundary surface by offsetting upwards based on the XY plane;

[0067] Based on the offset surface parameter of the XY plane, change the Y and Z values ​​of the parameter to create the floor mat transformation coordinate axis.

[0068] The following is an explanation with reference to the accompanying drawings and an example of the present invention, wherein the X direction represents the length direction of the vehicle, the Y direction represents the width direction of the vehicle, and the Z direction represents the height direction of the vehicle.

[0069] like Fig.11 As shown, the present invention provides a simple mold modeling method for floor mats based on CATIA software, and the steps are as follows:

[0070] Step 1: Create a parametric mold boundary feature surface template, transform the coordinate axis, and store it in the model library ( Figure 1 ).

[0071] Step 2: Import the scanned carpet point cloud data. ( Figure 2 )

[0072] Step 3: Establish the coordinate axis according to the carpet features and move it to the mold boundary through coordinate transformation. ( Figure 3 )

[0073] Step 4: Based on the carpet point cloud data, reversely build the base surface of the driver and passenger floor mats. Figure 4 )

[0074] Step 5: Use the trim command to split the reverse-engineered floor mat bottom surface to obtain the mold bottom surface. ( Figure 5 )

[0075] Step 6: Make the mold boundary base surface according to the carpet point cloud boundary. ( Figure 6 )

[0076] Step 7: Use the bottom surface of the mold to make special boundary cutting surfaces such as seat rails. ( Figure 7 )

[0077] Step 8: Use the special boundary clipping surface to clip the mold boundary base surface to obtain the upper boundary surface of the floor mat mold. Figure 8 )

[0078] Step 9: Use the upper boundary surface of the floor mat mold to offset and obtain the cutting surface of the bottom surface of the mold. Use this cutting surface to cut the parameter mold boundary feature surface to obtain the overall boundary of the floor mat mold ( Fig. 9 ).

[0079] Step 10: Use the dedicated boundary clipping surface to clip the overall boundary of the floor mat mold to complete the floor mat mold modeling. Fig.10 )

[0080] Example:

[0081] The modeling method includes the following steps:

[0082] Step 1: Taking the initial coordinates as the reference, the XZ plane is offset to the left and right respectively; the YZ plane is offset forward and backward respectively; the XY plane is offset upward, and the mold boundary surface is drawn. Taking the offset surface parameters as the reference, the Y direction is reduced by 70mm, and the X direction is reduced by 150mm (these are all empirical values ​​and can be fine-tuned according to actual conditions) to make the main and co-driver floor mats transform the coordinate axes A1 and A2. The results are shown in Figure 1 effect and make it into an import template.

[0083] Step 2: Use Import to import the scanned carpet point cloud, use the Filter command to thin the imported point cloud to avoid the situation where the digital model is too large and the operation is stuck, and then use Mesh Creation to generate the large surface of the carpet. The final effect is shown in the figure. Figure 2 .

[0084] Step 3: Use freestyle to reverse the bottom surface and bottom boundary of the carpet, and use this as the boundary surface to generate Figure 3 The three coordinates are shown and the carpet point cloud is moved to the mold using coordinate transformation.

[0085] Step 4: Reverse the main and co-pilot carpet to create Figure 4 For the carpet surface and the base surface, the intersection margin needs to be reserved when the base surfaces overlap each other to ensure that the parameters can be adjusted for subsequent fine-tuning.

[0086] Step 5: Trim the reverse base surface of the reverse carpet to obtain Figure 5 The bottom surface of the floor mat;

[0087] Step 6: Create a point cloud based on the carpet boundary Figure 6 A 5mm margin is reserved for the mold boundary base surface and the overlapped part of the parts to ensure that the carpet boundary is not exposed;

[0088] Step 7: Trim the reverse mold boundary to obtain the bottom surface of the mat, and then divide the bottom surface of the mat to obtain Figure 7 entity;

[0089] Step 8: Use the bottom surface splitting surface of the floor mat in step 7 to offset 5mm to get the upper boundary of the mold; use the floor mat surface offset of step 5 to offset 2mm, and the offset surface in step 1 to cut the inner and outer boundaries of the upper surface of the mold respectively to get Figure 8 Entity shown.

[0090] Step 9: Use the mold upper surface to offset 2mm to cut the side boundary of the floor mat mold to obtain the mold boundary entity.

[0091] It should be understood that the specific order or hierarchy of steps in the process disclosed by the present invention is an example of an exemplary method. Based on design preferences, it should be understood that the specific order or hierarchy of steps in the process can be rearranged without departing from the scope of protection of the present disclosure. The attached method claims provide the elements of the various steps in an exemplary order and are not intended to be limited to the specific order or hierarchy described.

[0092] The present invention also provides a simple mold modeling system for floor mats based on CATIA software, comprising the following modules:

[0093] Initial mold boundary module, used to establish parameterized initial mold boundary;

[0094] Carpet point cloud import module, used to import scanned carpet point cloud data;

[0095] A coordinate transformation module, used to establish a coordinate axis according to the carpet features and move it to the initial mold boundary with parameters through coordinate transformation;

[0096] The base surface establishment module of the floor mat bottom surface is used to adjust the initial mold boundary size with parameters according to the shape of the carpet point cloud, and reversely establish the base surface of the bottom surface of the floor mat mold;

[0097] A floor mat mold bottom surface establishment module is used to trim the base surface of the floor mat mold bottom surface to obtain the floor mat mold bottom surface entity;

[0098] The floor mat boundary base surface establishment module is used to make the floor mat mold boundary base surface according to the carpet point cloud boundary;

[0099] A floor mat mold upper boundary surface establishment module, which is used to trim the floor mat mold boundary base surface using a dedicated boundary clipping surface to obtain the floor mat mold upper boundary surface;

[0100] A floor mat mold overall boundary entity establishment module is used to offset the upper boundary surface of the floor mat mold to obtain a clipping surface of the bottom surface of the floor mat mold, and use the clipping surface to trim the initial mold boundary with parameters to obtain the overall boundary entity of the floor mat mold;

[0101] The floor mat mold entity establishment module is used to combine the floor mat mold bottom surface entity with the floor mat mold overall boundary entity to complete the floor mat mold entity modeling.

[0102] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A simple mold modeling method for floor mats based on CATIA software, characterized by: The following steps are included: Establish parameterized initial mold boundary; Import scanned carpet point cloud data; Establish coordinate axes according to carpet features and move them to the initial mold boundary with parameters through coordinate transformation; Adjust the initial mold boundary size with parameters according to the shape of the carpet point cloud, and reversely establish the base surface of the floor mat mold bottom surface; Trimming the base surface of the bottom surface of the floor mat mold to obtain a solid body of the bottom surface of the floor mat mold; According to the carpet point cloud boundary, make the base surface of the floor mat mold boundary; Using a dedicated boundary clipping surface to trim the boundary base surface of the floor mat mold to obtain an upper boundary surface of the floor mat mold; The upper boundary surface of the floor mat mold is offset to obtain a clipping surface of the bottom surface of the floor mat mold, and the clipping surface is used to trim the initial mold boundary with parameters to obtain the overall boundary entity of the floor mat mold; Combine the bottom surface entity of the floor mat mold with the overall boundary entity of the floor mat mold to complete the entity modeling of the floor mat mold.

2. The method for modeling a floor mat simple mold based on CATIA software according to claim 1, characterized in that: The method for making the parameterized initial mold boundary is as follows: Taking the initial coordinates of CATIA software as the reference, the XZ plane is offset to the left and right respectively, and the YZ plane is offset to the front and back respectively; Draw the initial mold boundary surface by offsetting upwards based on the XY plane; Based on the offset surface parameter of the XY plane, change the Y and Z values ​​of the parameter to create the floor mat transformation coordinate axis.

3. The method for modeling a floor mat simple mold based on CATIA software according to claim 1, characterized in that: When reverse engineering the foundation surface of the bottom surface of the floor mat mold, the intersection margins of the overlapping foundation surfaces need to be reserved for subsequent parameter adjustments.

4. The method for modeling a simple mold for a floor mat based on CATIA software according to claim 1, characterized in that: When making the base surface of the floor mat mold boundary, leave a margin for the overlapping parts to ensure that the carpet boundary is not exposed.

5. The method for modeling a floor mat simple mold based on CATIA software according to claim 1, characterized in that: The special boundary cutting surface is made by the bottom surface of the floor mat mold and the seat rail extraction surface.

6. A simple mold modeling system for floor mats based on CATIA software, characterized by: Includes the following modules, Initial mold boundary module, used to establish parameterized initial mold boundary; Carpet point cloud import module, used to import scanned carpet point cloud data; A coordinate transformation module, used to establish a coordinate axis according to the carpet features and move it to the initial mold boundary with parameters through coordinate transformation; The base surface establishment module of the floor mat bottom surface is used to adjust the initial mold boundary size with parameters according to the shape of the carpet point cloud, and reversely establish the base surface of the bottom surface of the floor mat mold; A floor mat mold bottom surface establishment module is used to trim the base surface of the floor mat mold bottom surface to obtain the floor mat mold bottom surface entity; The floor mat boundary base surface establishment module is used to make the floor mat mold boundary base surface according to the carpet point cloud boundary; A floor mat mold upper boundary surface establishment module, which is used to trim the floor mat mold boundary base surface using a dedicated boundary clipping surface to obtain the floor mat mold upper boundary surface; A floor mat mold overall boundary entity establishment module is used to offset the upper boundary surface of the floor mat mold to obtain a clipping surface of the bottom surface of the floor mat mold, and use the clipping surface to trim the initial mold boundary with parameters to obtain the overall boundary entity of the floor mat mold; The floor mat mold entity establishment module is used to combine the floor mat mold bottom surface entity with the floor mat mold overall boundary entity to complete the floor mat mold entity modeling.

Images