Method for manufacturing an automotive interior covering and interior covering

Abstract

The application discloses a manufacturing method of an automotive interior covering part and the automotive interior covering part and belongs to the technical field of automotive interiors. The curvature change data is obtained by measuring the curvature of the main body profile, and then the curvature change data is compared with the first threshold value. The line segment with the curvature change data greater than the first threshold value is set as a mutation segment, and the line segment with the curvature change data less than the first threshold value is set as a gentle segment. The gentle segment is offset outward by a first preset allowance distance to obtain a gentle segment profile. The mutation segment is offset outward by a second preset allowance distance to obtain a mutation segment profile. All the mutation segment profiles and all the gentle segment profiles are fitted to form a finished product profile. Thus, the allowance of the mutation segment profile is greater than the allowance of the gentle segment profile, the mutation segment profile of the finished product profile can completely cover the to-be-covered surface and the corners of the automotive interior part, the overall allowance of the finished product profile is reduced, and the material cost of the automotive interior covering part is reduced.

Description

Technical Field

[0001] This invention relates to the field of automotive interior technology, and in particular to a method for manufacturing automotive interior coverings and the interior covering itself. Background Technology

[0002] Automotive interior trim panels are used to cover the surfaces of automotive interior components, enhancing their aesthetics, comfort, and safety. Currently, interior trim panels are designed based on the front of the interior component to be covered, with sufficient edge allowance at the outer edge to ensure the outer edge can wrap around the back of the component, thus guaranteeing complete coverage of the corners. However, this edge allowance affects the material cost of the trim panel; therefore, reducing this allowance is key to cost reduction and efficiency improvement. Summary of the Invention

[0003] This invention aims to at least solve one of the technical problems existing in the prior art. To this end, this invention proposes a manufacturing method for automotive interior trim panels and an interior trim panel, ensuring that the abrupt change in the contour of the finished product can completely cover the surface to be covered and its edges of the automotive interior trim panel, and helps to reduce the overall edge allowance of the finished contour, thereby helping to reduce the material cost of the automotive interior trim panel.

[0004] A method for manufacturing an automotive interior trim panel according to a first aspect of the present invention includes:

[0005] Obtain a model of the surface to be covered for the automotive interior parts, and design the main body of the covering part based on the model of the surface to be covered;

[0006] The main body is flattened to obtain the main outline of the covering, and curvature change data is obtained based on the main outline;

[0007] The main body contour is divided into multiple smooth segments and multiple abrupt segments based on the curvature change data and the first threshold. The curvature of the abrupt segments is greater than the first threshold, and the curvature of the smooth segments is less than or equal to the first threshold.

[0008] Multiple smooth segment contours are obtained based on the multiple smooth segments and the first preset allowance;

[0009] Multiple mutation segment outlines are obtained based on multiple mutation segments and a second preset margin, wherein the second preset margin is greater than the first preset margin;

[0010] The finished profile of the covering is formed by fitting all the smooth segment profiles and all the abrupt segment profiles.

[0011] The method for manufacturing automotive interior trim coverings according to embodiments of the present invention has at least the following beneficial effects: After designing the main body of the covering based on the model of the surface to be covered of the automotive interior trim, the main body is flattened to obtain the main body outline. Curvature change data is obtained by measuring the curvature of the main body outline. Then, the curvature change data is compared with a first threshold. Line segments with curvature change data greater than the first threshold are designated as abrupt segments, and line segments with curvature change data less than the first threshold are designated as smooth segments. The smooth segments are offset outward by a first preset allowance to obtain the smooth segment outline. The abrupt segments are offset outward by a second preset allowance to obtain the abrupt segment outline, and the first preset allowance is less than the second preset allowance. All abrupt segment outlines and all smooth segment outlines are fitted to form the finished outline, thereby ensuring that the edge allowance of the abrupt segment outline is greater than that of the smooth segment outline. This ensures that the abrupt segment outline of the finished outline can completely cover the surface to be covered and its corners of the automotive interior trim, and helps to reduce the overall edge allowance of the finished outline, thus helping to reduce the material cost of the automotive interior trim covering.

[0012] According to some embodiments of the present invention, obtaining multiple mutation segment profiles based on multiple mutation segments and a second preset margin includes:

[0013] Determine whether the curvature of the abrupt change segment is greater than a second threshold;

[0014] When the curvature of the abrupt segment is greater than the second threshold, a compensation margin is obtained based on the curvature of the abrupt segment;

[0015] The profile of the mutation segment is obtained based on the mutation segment, the second preset margin, and the compensation margin.

[0016] According to some embodiments of the present invention, obtaining the compensation margin based on the curvature of the abrupt change segment includes:

[0017] A table relating the curvature of the abrupt change segment to the compensation margin is established based on the preset data of the covering component.

[0018] The compensation margin is obtained by looking up the relationship table.

[0019] According to some embodiments of the present invention, establishing a relationship table between the curvature of the abrupt change segment and the compensation margin based on preset data of the covering component includes:

[0020] Obtain preset data of the covering, which includes the material type, thickness range, and adhesive type of the covering;

[0021] The compensation margin is obtained by performing a coating test on the coated component.

[0022] According to some embodiments of the present invention, the method for manufacturing automotive interior trim panels further includes:

[0023] Determine whether the curvature of the abrupt change segment is greater than a third threshold;

[0024] When the curvature of the abrupt segment is greater than the third threshold, multiple grooves are formed in the outline of the abrupt segment.

[0025] According to some embodiments of the present invention, the method of forming multiple grooves in the contour of the abrupt change segment includes:

[0026] Determine whether the outline of the abrupt change segment is convex or concave.

[0027] When the abrupt change segment has a convex profile, the depth of the groove is less than its width;

[0028] When the profile of the mutation segment is concave, the depth of the groove is greater than its width.

[0029] According to some embodiments of the present invention, the step of designing the body of the covering component based on the model of the surface to be covered includes:

[0030] Obtain the first outer edge contour of the model to be covered;

[0031] The second outer edge contour of the main body is defined based on the first outer edge contour, and the second outer edge contour is flush with the first outer edge contour.

[0032] According to some embodiments of the present invention, the step of fitting the finished profile of the overlay based on all the smooth segment profiles and all the abrupt segment profiles includes:

[0033] All the smooth segment contours and all the abrupt segment contours are enclosed to form a multi-segment contour, which contains multiple gap segments;

[0034] The finished profile is formed by extending the end of each of the smooth sections and the end of each of the abrupt sections into the adjacent gap sections.

[0035] According to some embodiments of the present invention, the first preset allowance is 8mm.

[0036] The interior trim piece according to a second aspect of the present invention is manufactured by the automotive interior trim piece manufacturing method described in the above embodiments.

[0037] Since the interior trim is manufactured by the automotive interior trim manufacturing method of the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, and will not be repeated here. Attached Figure Description

[0038] Figure 1 This is a flowchart of a method for manufacturing automotive interior trim panels according to an embodiment of the present invention;

[0039] Figure 2 This is a flowchart of obtaining the profile of the mutation segment in one embodiment of the present invention;

[0040] Figure 3 This is a flowchart of obtaining the compensation margin in one embodiment of the present invention;

[0041] Figure 4 This is a flowchart of establishing a relation table in one embodiment of the present invention;

[0042] Figure 5 This is a flowchart of creating grooves in the contour of a mutation segment according to one embodiment of the present invention;

[0043] Figure 6 This is a flowchart illustrating different types of grooves in one embodiment of the present invention;

[0044] Figure 7 This is a flowchart of obtaining the subject in one embodiment of the present invention;

[0045] Figure 8 This is a flowchart of fitting the contour of the finished product in one embodiment of the present invention. Detailed Implementation

[0046] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0047] In the description of this invention, it should be understood that the terms front, back, up, down, axial, circumferential, etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0048] In the description of this invention, "multiple" means two or more; "greater than," "less than," and "exceeding" are understood to exclude the stated number; "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0049] In the description of this invention, it should be noted that terms such as "set up," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0050] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described below are some embodiments of the present invention, not all embodiments.

[0051] Reference Figures 1 to 8 As shown, the present invention provides a method for manufacturing automotive interior trim components.

[0052] Reference Figure 1 As shown, the method for manufacturing automotive interior trim includes the following steps.

[0053] Step S100: Obtain the model of the surface to be covered for the automotive interior parts, and design the main body of the covering part based on the model of the surface to be covered.

[0054] The model of the surface to be covered is obtained based on the model of the automotive interior parts. The main body of the covering part is designed from the model of the surface to be covered. The main body can fit tightly onto the model of the surface to be covered. Theoretically, this ensures that the main body can completely cover the surface to be covered of the automotive interior parts, thereby ensuring that the outline of the main body obtained after flattening the main body onto the two-dimensional plane can meet the covering requirements.

[0055] Step S200: Flatten the main body to obtain the main outline of the covering part, and obtain curvature change data based on the main outline.

[0056] The main body is flattened onto a two-dimensional plane, and the outline of the main body is drawn along its outer edge. The outer edge of the main body outline includes at least the shape of the outer edge of the model of the interior part to be covered, thus ensuring that the main body outline can cover the outer edge of the interior part to be covered. Points are set at intervals, and the curvature of multiple points on the main body outline is measured or calculated to obtain the curvature of multiple points on the main body outline. The curvature of multiple points is integrated into the curvature change data of the main body outline to facilitate the evaluation of the degree of bending at various positions of the main body outline.

[0057] Step S300: Based on the curvature change data and the first threshold, the main contour is divided into multiple smooth segments and multiple abrupt segments. The curvature of the abrupt segments is greater than the first threshold, and the curvature of the smooth segments is less than or equal to the first threshold.

[0058] Set a first threshold and compare the curvature change data of the main outline with the first curvature; when the curvature is greater than the first threshold, it proves that the curvature of the part is large, and the part is set as an abrupt segment; when the curvature is not greater than the first threshold, it proves that the curvature of the part is small, and the part is set as a smooth segment.

[0059] It is understandable that abrupt changes have more complex and varied shapes, requiring higher requirements for the covering structure of this part; while smooth sections have relatively straight and simple shapes, requiring lower requirements for the covering structure of this part. Therefore, abrupt changes and smooth sections should be distinguished so that different edge allowances can be set for smooth sections and abrupt changes separately.

[0060] Step S400: Obtain multiple smooth segment contours based on multiple smooth segments and a first preset allowance.

[0061] The main outline has multiple smooth segments separated from each other. Each smooth segment is shifted outward by a first preset allowance to form multiple smooth segment outlines outside the main outline. The first preset allowance is the edge-wrapping allowance of the smooth segment, ensuring that the smooth segment outline can wrap around the back from the outer edge of the interior part with a small degree of curvature, which helps to save the amount of material used for the smooth segment.

[0062] Step S500: Obtain multiple mutation segment profiles based on multiple mutation segments and a second preset margin, wherein the second preset margin is greater than the first preset margin.

[0063] There are multiple abrupt transition segments separated from each other on the main outline. Each abrupt transition segment is translated outward by a second preset allowance to form multiple abrupt transition segment outlines outside the main outline. The second preset allowance is the edge wrapping allowance of the abrupt transition segment, and the second preset allowance needs to be greater than the first preset allowance to ensure that the abrupt transition segment outline can wrap back from the outer edge of the interior part with a large degree of curvature to the back side.

[0064] Step S600: Fit the contours of all smooth segments and all abrupt segments to form the finished contour of the covering part.

[0065] Fit all the gently sloping contours that are separated from each other and all the convex contours that are separated from each other to create the finished contour, which includes the main contour.

[0066] After designing the main body of the covering part based on the model of the surface to be covered of the automotive interior parts, the main body is flattened to obtain the main body outline. Curvature change data is obtained by measuring the curvature of the main body outline. Then, the curvature change data is compared with a first threshold. Line segments with curvature change data greater than the first threshold are set as abrupt segments, and line segments with curvature change data less than the first threshold are set as smooth segments.

[0067] The smooth segment is offset outward by a first preset margin to obtain the smooth segment outline, and the abrupt segment is offset outward by a second preset margin to obtain the abrupt segment outline, wherein the first preset margin is less than the second preset margin. All abrupt segment outlines and all smooth segment outlines are fitted together to form the finished outline.

[0068] This ensures that the edge allowance of the abrupt change section is greater than that of the smooth section, guaranteeing that the abrupt change section of the finished profile can completely cover the surface to be covered and its corners of the automotive interior parts. It also helps to reduce the overall edge allowance of the finished profile, which in turn helps to reduce the material cost of the automotive interior parts.

[0069] In some embodiments, refer to Figure 2 As shown, step 500, obtaining multiple mutation segment profiles based on multiple mutation segments and a second preset margin, includes the following steps.

[0070] Step 510: Determine whether the curvature of the abrupt segment is greater than the second threshold.

[0071] Among the multiple mutation segments, some mutation segments have a curvature greater than the second threshold. The greater curvature of these mutation segments indicates that the structure is more complex and variable, and the margin of these mutation segments needs to be further adjusted.

[0072] Step 520: When the curvature of the mutation segment is greater than the second threshold, the compensation margin is obtained based on the curvature of the mutation segment.

[0073] When the curvature of a certain abrupt change segment exceeds the second threshold, the corresponding compensation margin is found by the curvature of the abrupt change segment, and the edge margin of the abrupt change segment is corrected by the compensation margin.

[0074] Step 530: Obtain the profile of the mutation segment based on the mutation segment, the second preset margin, and the compensation margin.

[0075] The abrupt change segment is offset outward by a second preset margin and then offset outward by a compensation margin to obtain a corrected abrupt change segment profile. This is to adapt to the more complex abrupt change segment structure. After the cover is wrapped around the car interior, the edge allowance of the abrupt change segment profile is greater, which helps the abrupt change segment profile wrap around the back of the interior part to form sufficient stretch, ensuring that the abrupt change segment of the cover can be firmly wrapped around the interior part and preventing the complex structure of the abrupt change segment from causing delamination.

[0076] In some embodiments, refer to Figure 3 As shown, step S520, obtaining the compensation margin based on the curvature of the abrupt segment, includes the following steps.

[0077] Step 521: Establish a relationship table between the curvature and compensation margin of the abrupt change segment based on the preset data of the covering component.

[0078] The relationship table is established based on the preset data of the coating component, such as the data obtained by coating test measurements during the early coating development stage.

[0079] Wrapping tests were conducted on wrapping parts with the same material, thickness, and adhesive. The curvature was set into multiple curvature ranges distributed in ascending order, and then corresponding interior test parts were designed for each curvature range.

[0080] For an interior trim test piece, multiple wrapping test pieces with different edge binding allowances are designed. These multiple wrapping test pieces are then wrapped onto the same interior trim test piece to verify the wrapping effect of the wrapping test pieces with different edge binding allowances. After a preset time, the wrapping performance of the wrapping test pieces with different edge binding allowances is verified. From the above wrapping test pieces, the wrapping test piece with the wrapping performance and effect that meet the requirements and has the smallest edge binding allowance is determined as the target wrapping test piece. The edge binding allowance of the target wrapping test piece is then subtracted from the second preset allowance to obtain the compensation allowance, and the compensation allowance corresponds to a curvature range.

[0081] Of course, the smaller the range of curvature, the more accurate the compensation margin is determined, and therefore the more accurate the relationship table is established. Similarly, there may be multiple curvature ranges with the same compensation margin, in which case multiple curvature ranges can be merged into a larger curvature range.

[0082] Step 522: Obtain the compensation margin by looking up the relationship table.

[0083] Based on the above scheme, a table showing the relationship between curvature range and compensation margin is obtained. According to the actual situation, the curvature range corresponding to the curvature of the abrupt segment is found in the table, and then the corresponding compensation margin is found, so that the abrupt segment contour corresponding to the abrupt segment saves more material costs.

[0084] In some embodiments, refer to Figure 4 As shown, step S521, establishing a relationship table between the difference and the compensation allowance based on the preset data of the covering part, includes the following steps.

[0085] Step 5211: Obtain the preset data of the covering part, which includes the material type, thickness range and adhesive type of the covering part.

[0086] Since there are various types of materials used for covering parts, such as fabric, genuine leather, PVC leather, microfiber leather, and modified polypropylene, different types of covering parts will produce different covering effects and performance when covered on the same interior part. Therefore, the relationship table needs to be matched with the corresponding material type.

[0087] The thickness of the coated component and the type of adhesive also affect the coating effect; the relationship table needs to match the corresponding thickness range and adhesive type.

[0088] After determining the above conditions, the covered parts can be tested.

[0089] Step 5212: Perform a covering test on the covered part to calibrate and obtain the compensation margin.

[0090] Wrapping tests were conducted on wrapping parts with the same material, thickness, and adhesive. The curvature was set into multiple curvature ranges distributed in ascending order, and then corresponding interior test parts were designed for each curvature range.

[0091] For an interior trim test piece, multiple wrapping test pieces with different edge binding allowances are designed. These multiple wrapping test pieces are then wrapped onto the same interior trim test piece to verify the wrapping effect of the wrapping test pieces with different edge binding allowances. After a preset time, the wrapping performance of the wrapping test pieces with different edge binding allowances is verified. From the above wrapping test pieces, the wrapping test piece with the wrapping performance and effect that meet the requirements and has the smallest edge binding allowance is determined as the target wrapping test piece. The edge binding allowance of the target wrapping test piece is then subtracted from the second preset allowance to obtain the compensation allowance, and the compensation allowance corresponds to a curvature range.

[0092] Of course, the smaller the range of curvature, the more accurate the compensation margin is determined, and therefore the more accurate the relationship table is established. Similarly, there may be multiple curvature ranges with the same compensation margin, in which case multiple curvature ranges can be merged into a larger curvature range.

[0093] In some embodiments, refer to Figure 5 As shown, the method for manufacturing automotive interior trim also includes the following steps.

[0094] Step S700: Determine whether the curvature of the abrupt segment is greater than the third threshold.

[0095] The third threshold is used to determine whether a groove needs to be opened in the abrupt change section. When the curvature of the abrupt change section exceeds the third threshold, the interior parts will have a large angle at the position of the abrupt change section.

[0096] Step S710: When the curvature of the mutation segment is greater than the third threshold, multiple grooves are opened in the outline of the mutation segment.

[0097] When the contour of the abrupt change segment is wrapped around the back of the corner of the interior trim, the contour of the abrupt change segment is compressed and folded at the corner position, which can easily cause wrinkles to appear in the abrupt change segment.

[0098] Multiple grooves are made on the contour of the abrupt change segment, and the contour of the abrupt change segment wraps around the back of the corner. The grooves can reduce the wrinkles formed by the contour of the abrupt change segment, thereby avoiding wrinkles in the abrupt change segment and helping to save material costs.

[0099] In some embodiments, refer to Figure 6 As shown, step S710 involves creating multiple grooves in the contour of the abrupt change segment, including the following steps.

[0100] Step S711: Determine whether the outline of the abrupt change segment is convex or concave.

[0101] The corners of interior trim parts may be convex outwards or concave inwards, and the shape of the abrupt transition section contour can be divided into two types: convex outwards or concave inwards.

[0102] Step S712: When the profile of the abrupt change segment is convex, the depth of the groove is less than its width.

[0103] When the contour of the abrupt change section is convex, after the contour of the abrupt change section wraps around the back of the interior trim, the contour of the abrupt change section has compression and folding wrinkles. The width of the groove is greater than its depth to form more clearance space, and the groove should not be too deep. The shallow depth of the groove can ensure the tensile force of the contour of the abrupt change section on the abrupt change section.

[0104] Step S713: When the profile of the mutation segment is concave, the depth of the groove is greater than its width.

[0105] The abrupt change segment has a concave profile. After the abrupt change segment profile wraps around the back of the interior trim, it is subjected to an outward stretching force. The width of the groove is less than its depth. Multiple grooves are used to prevent the extended abrupt change segment profile from being torn.

[0106] In some embodiments, refer to Figure 7 As shown, step S100 involves designing the main body of the covering component based on the model of the surface to be covered, including the following steps.

[0107] Step S110: Obtain the first outer edge contour of the model to be covered.

[0108] After obtaining the 3D model of the automotive interior parts, the model of the surface to be covered is obtained based on the 3D model, and then the first outer edge contour is extracted around the outer edge of the model of the surface to be covered.

[0109] Step S120: Set the second outer edge contour of the main body according to the first outer edge contour, and the second outer edge contour is flush with the first outer edge contour.

[0110] The second outer edge contour of the main body is designed based on the first outer edge contour, ensuring that the main body can completely cover the surface to be covered by the interior trim.

[0111] In some embodiments, refer to Figure 8 As shown, step S600, which involves fitting the finished profile of the covering part based on the profiles of all smooth segments and all abrupt segments, includes the following steps.

[0112] Step S610: Enclose all smooth segment contours and all abrupt segment contours into a multi-segment contour, which contains multiple gap segments.

[0113] The smooth segment is offset outward to obtain the smooth segment outline, and the abrupt segment is offset outward to obtain the abrupt segment outline. The ends of the smooth segment outline and the ends of the abrupt segment outline are both in a broken state. Then, multiple smooth segment outlines and multiple abrupt segment outlines form an incomplete multi-segment outline. There are multiple gap segments between the multi-segment outlines. The gap segments may be located between two adjacent outlines.

[0114] Step S620: Extend the ends of each smooth section profile and each abrupt section profile to the adjacent gap section to form the finished profile.

[0115] The end of each gentle segment extends into the adjacent gap segment, and the end of each abrupt segment extends into the adjacent gap segment, thus constructing a complete finished product profile.

[0116] In some embodiments, the first preset allowance is 8mm.

[0117] The first preset allowance is 8mm, which can ensure that the smooth contour of the covering part covers the back of the interior part.

[0118] The present invention also provides an interior trim piece, manufactured by the automotive interior trim piece manufacturing method described in the above embodiments.

[0119] After designing the main body of the covering part based on the model of the surface to be covered of the automotive interior parts, the main body is flattened to obtain the main body outline. Curvature change data is obtained by measuring the curvature of the main body outline. Then, the curvature change data is compared with a first threshold. Line segments with curvature change data greater than the first threshold are set as abrupt segments, and line segments with curvature change data less than the first threshold are set as smooth segments.

[0120] The smooth segment is offset outward by a first preset margin to obtain the smooth segment outline, and the abrupt segment is offset outward by a second preset margin to obtain the abrupt segment outline, wherein the first preset margin is less than the second preset margin. All abrupt segment outlines and all smooth segment outlines are fitted together to form the finished outline.

[0121] This ensures that the edge allowance of the abrupt change section is greater than that of the smooth section, guaranteeing that the abrupt change section of the finished profile can completely cover the surface to be covered and its corners of the automotive interior parts. It also helps to reduce the overall edge allowance of the finished profile, which in turn helps to reduce the material cost of the automotive interior parts.

[0122] The embodiments described in this application are for the purpose of more clearly illustrating the technical solutions of the embodiments of this application, and do not constitute a limitation on the technical solutions provided by the embodiments of this application. As those skilled in the art will know, with the evolution of technology and the emergence of new application scenarios, the technical solutions provided by the embodiments of this application are also applicable to similar technical problems.

[0123] Those skilled in the art will understand that the technical solutions shown in the figures do not constitute a limitation on the embodiments of this application, and may include more or fewer steps than shown, or combine certain steps, or different steps.

[0124] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs.

[0125] Those skilled in the art will understand that all or some of the steps in the methods disclosed above, as well as the functional modules / units in the systems and devices, can be implemented as software, firmware, hardware, or appropriate combinations thereof.

[0126] The terms “first,” “second,” “third,” “fourth,” etc. (if present) in the specification and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms “comprising” and “having,” and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0127] It should be understood that in this application, "at least one (item)" means one or more, and "more than" means two or more. "And / or" is used to describe the relationship between related objects, indicating that three relationships can exist. For example, "A and / or B" can represent three cases: only A exists, only B exists, and both A and B exist simultaneously, where A and B can be singular or plural. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship. "At least one (item) of the following" or similar expressions refer to any combination of these items, including any combination of single or plural items. For example, at least one (item) of a, b, or c can represent: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", where a, b, and c can be single or multiple.

[0128] In the several embodiments provided in this application, it should be understood that the disclosed apparatus and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative. For example, the division of the above units is merely a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed.

[0129] The units described above as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0130] Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0131] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes multiple instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods of the various embodiments of this application. The aforementioned storage medium includes various media capable of storing programs, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0132] The preferred embodiments of the present application have been described above with reference to the accompanying drawings, but this does not limit the scope of the claims of the present application. Any modifications, equivalent substitutions, and improvements made by those skilled in the art without departing from the scope and substance of the embodiments of the present application shall be within the scope of the claims of the present application.

Claims

1. A method for manufacturing automotive interior trim components, characterized in that, include: Obtain a model of the surface to be covered for the automotive interior parts, and design the main body of the covering part based on the model of the surface to be covered; The main body is flattened to obtain the main outline of the covering, and curvature change data is obtained based on the main outline; The main body contour is divided into multiple smooth segments and multiple abrupt segments based on the curvature change data and the first threshold. The curvature of the abrupt segments is greater than the first threshold, and the curvature of the smooth segments is less than or equal to the first threshold. Multiple smooth segment contours are obtained based on the multiple smooth segments and the first preset allowance; Multiple mutation segment outlines are obtained based on multiple mutation segments and a second preset margin, wherein the second preset margin is greater than the first preset margin; The finished profile of the covering is formed by fitting all the smooth segment profiles and all the abrupt segment profiles; The process of obtaining multiple mutation segment profiles based on multiple mutation segments and a second preset margin includes: Determine whether the curvature of the abrupt change segment is greater than a second threshold; When the curvature of the abrupt segment is greater than the second threshold, a compensation margin is obtained based on the curvature of the abrupt segment; The profile of the mutation segment is obtained based on the mutation segment, the second preset margin, and the compensation margin; The step of obtaining the compensation margin based on the curvature of the abrupt change segment includes: A table relating the curvature of the abrupt change segment to the compensation margin is established based on the preset data of the covering component. The compensation margin is obtained by looking up the relationship table. The step of establishing a relationship table between the curvature of the abrupt change segment and the compensation margin based on preset data of the covering component includes: Obtain preset data of the covering, which includes the material type, thickness range, and adhesive type of the covering; The compensation margin is obtained by performing a coating test on the coated component.

2. The method for manufacturing automotive interior trim coverings according to claim 1, characterized in that, The method for manufacturing automotive interior trim also includes: Determine whether the curvature of the abrupt change segment is greater than a third threshold; When the curvature of the abrupt segment is greater than the third threshold, multiple grooves are formed in the outline of the abrupt segment.

3. The method for manufacturing automotive interior trim coverings according to claim 2, characterized in that, The method of creating multiple grooves in the contour of the abrupt change segment includes: Determine whether the outline of the abrupt change segment is convex or concave. When the abrupt change segment has a convex profile, the depth of the groove is less than its width; When the profile of the mutation segment is concave, the depth of the groove is greater than its width.

4. The method for manufacturing automotive interior trim coverings according to claim 1, characterized in that, The design of the main body of the covering component based on the model of the surface to be covered includes: Obtain the first outer edge contour of the model to be covered; The second outer edge contour of the main body is defined based on the first outer edge contour, and the second outer edge contour is flush with the first outer edge contour.

5. The method for manufacturing automotive interior trim coverings according to claim 1, characterized in that, The process of fitting the finished profile of the covering component based on all the smooth segment profiles and all the abrupt segment profiles includes: All the smooth segment contours and all the abrupt segment contours are enclosed to form a multi-segment contour, which contains multiple gap segments; The finished profile is formed by extending the end of each of the smooth sections and the end of each of the abrupt sections into the adjacent gap sections.

6. The method for manufacturing automotive interior trim coverings according to claim 1, characterized in that, The first preset allowance is 8mm.

7. An interior trim piece, characterized in that, Manufactured by the method for manufacturing automotive interior trim panels as described in any one of claims 1 to 6.

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