Sample processing method

Abstract

The application provides a sample part machining method, comprising the following steps: fixing a blank part on a workbench, and performing subtractive machining from a first surface of the blank part which is opposite to the workbench to form a first contour of a sample part; covering the first contour of the sample part with a separation part; selecting one or more reinforcing parts on the first contour of the sample part according to the geometric shape of the sample part; covering the one or more reinforcing parts with a two-component polyurethane material; filling a gap between the first contour of the sample part and a part of the blank part other than the first contour of the sample part with an oil sludge material to form a surface flush with the first surface of the blank part; after the two-component polyurethane material and the oil sludge material are both solidified, turning over the blank part, and performing subtractive machining from a second surface of the blank part which is opposite to the first surface to form a second contour of the sample part; and separating the sample part from the blank part.

Description

Technical Field

[0001] This application relates to the field of vehicle model prototype processing technology, and specifically to a prototype processing method. Background Technology

[0002] To meet the design demonstration or review requirements of automotive interior and exterior trim, a large number of highly transparent prototypes need to be produced. Model cars typically consist of many prototype parts. Vehicle models are often used for component dimensional verification. To meet the high precision requirements of these prototypes, 5-axis machining centers are typically used to process them. The surfaces of these prototypes are usually G0 surfaces (point-continuous surfaces), making it impossible to design positioning supports for machine tool positioning. Existing processing methods typically involve machining one side of the prototype, filling and fixing it with plaster, and then flipping the prototype to process the other side. Traditional plaster filling and fixing methods require mixing plaster powder and water in specific proportions, which can easily cause secondary pollution at the processing site. Furthermore, the curing time of the plaster is easily affected by ambient temperature and humidity, resulting in uncontrollable curing times, typically ranging from 10 to 24 hours. Additionally, the adhesive strength of plaster is relatively low, causing the prototypes to easily detach during processing. Summary of the Invention

[0003] This application aims to provide a sample processing method to solve or alleviate at least some of the problems mentioned in the background art.

[0004] To achieve one of the aforementioned objectives, according to one aspect of this application, a method for processing a sample is provided, the sample being a part of a vehicle model, the sample being enclosed by a first contour and a second contour, the method comprising the following steps:

[0005] S100: Fix the blank on the worktable and perform subtractive processing from the back of the blank against the first surface of the worktable to form the first contour of the sample.

[0006] S200: The first contour of the sample is covered by a spacer;

[0007] S300: Select one or more reinforcing parts on the first contour of the sample according to the geometry of the sample;

[0008] S400: The one or more reinforcing parts are covered with a two-component polyurethane material;

[0009] S500: Fill the gap between the first contour of the sample and the portion of the blank other than the first contour of the sample with clay material to form a surface flush with the first surface of the blank.

[0010] S600: After both the two-component polyurethane material and the putty material have cured, the blank is flipped over and subtractive processing is performed on the second surface of the blank opposite to the first surface to form the second contour of the sample.

[0011] S700: Separate the sample from the blank.

[0012] In addition to one or more of the features described above, or as an alternative, in another embodiment, step S700 includes: heating and curing the two-component polyurethane material and the putty material to soften them, and separating the sample from the blank.

[0013] In addition to one or more of the features described above, or as an alternative, in another embodiment, the two-component polyurethane material comprises a material uniformly mixed from a polyurethane prepolymer and a curing agent in a 1:1 weight ratio.

[0014] In addition to one or more of the features described above, or as an alternative, in another embodiment, the two-component polyurethane material is cured within a maximum of 3 hours after the polyurethane prepolymer and the curing agent are mixed.

[0015] In addition to one or more of the features described above, or as an alternative, in another embodiment, the method includes heating the sludge material to soften it prior to step S500.

[0016] In addition to one or more of the features described above, or as an alternative, in another embodiment, the method includes heating the sludge material to 68 degrees Celsius prior to step S500.

[0017] In addition to one or more of the features described above, or as an alternative, in another embodiment, the heated sludge material is cured after cooling at room temperature for 3-4 hours.

[0018] In addition to one or more of the features described above, or as an alternative, in another embodiment, the sludge material is filled in a layer-by-layer manner in step S500.

[0019] In addition to one or more of the features described above, or as an alternative, in another embodiment, the thickness of each layer of sludge material is at most 15 mm.

[0020] In addition to one or more of the features described above, or as an alternative, in another embodiment, the method includes cleaning a first contour of the sample prior to step S200.

[0021] According to the sample processing method of this application, by using clay material and two-component polyurethane material as positioning and support materials when processing the sample, it is not easy for the sample to fall off the blank during the sample flipping process, and the stable positioning of the sample is guaranteed, thereby improving the accuracy of sample processing. Attached Figure Description

[0022] The disclosure of this application will be more readily understood with reference to the accompanying drawings. It should be understood that these drawings are for illustrative purposes only and are not intended to limit the scope of protection of this application.

[0023] In the picture:

[0024] Figure 1 This is a flowchart of a sample processing method according to one embodiment of this application;

[0025] Figure 2 It is to utilize Figure 1 A schematic diagram of the first contour of the sample processed by the method;

[0026] Figure 3 Fixation using clay material and two-component polyurethane material Figure 2 A schematic diagram of the sample in the diagram; and

[0027] Figure 4 Is it completed? Figure 1 A schematic diagram of the sample obtained after the method. Detailed Implementation

[0028] The present application will now be described in detail with reference to exemplary embodiments shown in the accompanying drawings. However, it should be understood that the present application may be implemented in many different forms and should not be construed as limited to the embodiments set forth herein. These embodiments are provided herein to make the disclosure of the present application more complete and clear, and to fully convey the concept of the present application to those skilled in the art.

[0029] Furthermore, for any single technical feature described or implied in the embodiments mentioned herein, or any single technical feature shown or implied in the accompanying drawings, those skilled in the art will readily conceive of appropriate combinations or deletions among these technical features (or their equivalents), thereby obtaining more other embodiments of this application that may not be directly mentioned herein, which do not depart from the technical concept of this application.

[0030] Figure 1This is a flowchart of a sample processing method according to one embodiment of this application, wherein the sample is part of a vehicle model and is used to showcase the interior and exterior design of the vehicle. Preferably, it is made of transparent acrylic material, which is suitable for digital modeling and has a light transmittance of over 92%, a soft luster, clear visual appeal, and excellent display effect after dyeing. It is suitable for making transparent samples such as headlight housings, screen panels, and trim strips for vehicle models. The sample 200 is formed by a first contour 210 and a second contour. In a preferred embodiment, the sample 200 is divided into the first contour 210 and the second contour at its maximum cross-section in one dimension, for example, for... Figure 4 The bracelet-shaped annular sample 200 shown is divided into a visible first contour 210 and a hidden second contour at the cross-section in the middle of its thickness (i.e., the plane containing the outermost circular contour shown). The method of this application can be applied to the processing and manufacturing of thin-walled model samples 200 with complex curved surfaces.

[0031] like Figure 1 As shown, the sample processing method includes the following steps:

[0032] S100: The blank 100 (which may be a sheet metal) is fixed on the worktable, and subtractive processing (e.g., machine tool cutting) is performed on the first surface 110 of the blank 100 to form the first contour 210 of the sample 200. For example Figure 2 The first outline 210 of the annular sample 200 formed on the blank 100 is illustrated, as well as the annular recess 111 on the periphery of the annular sample 200 and the circular recess 112 inside the sample 200 formed by subtractive processing.

[0033] S200: A first contour 210 of the sample 200 is covered with a separator (not shown), such as tape, to protect the surface of the sample 200 and to facilitate the separation of the two-component polyurethane material and the putty material from the sample 200 in subsequent steps, thereby reducing the residue of the two-component polyurethane material and the putty material on the surface of the sample 200.

[0034] S300: Select one or more reinforcing parts on the first contour 210 of the sample 200 according to the geometry of the sample 200, such as two opposite arcuate parts of a circular sample, or parts of other shaped samples with large curvature changes or complex contours.

[0035] S400: One or more reinforcements are covered with a two-component polyurethane material to strengthen these feature areas and prevent damage during processing.

[0036] S500: Fill the gap between the first contour 210 of the sample 200 and the portion of the blank 100 other than the first contour 210 of the sample 200 with clay material (preferably sculpting clay) to form a surface flush with the first surface 110 of the blank 100.

[0037] like Figure 3 As shown, the coverage area A of the two-component polyurethane material on the first contour 210 of the sample 200 is schematically indicated by a slanted dashed line, and the filling area B of the putty is schematically indicated by a slanted solid line. For clarity, neither the dashed nor solid lines completely cover the sample 200; however, it should be understood that in actual operation, the two-component polyurethane material and the putty together completely cover the sample 200 to provide support and protection. Figure 3 In the sample 200, a two-component polyurethane material covers two opposing arcuate portions of the first contour 210, while a putty material fills the remaining portions of the annular recess 111 and the circular recess 112. Although Figure 3 The boundary between the two-component polyurethane material and the putty material shown is a straight line, but in actual operation, due to the soft texture of the materials and manual handling, the boundary may not be a straight line, and the coverage area of ​​the two-component polyurethane material may be larger or smaller.

[0038] Next, step S600 is performed: after both the two-component polyurethane material and the putty material have cured, the blank 100 is flipped over, and subtractive processing is performed on the second surface of the blank 100 opposite to the first surface 110 to form the second contour of the sample 200. At this point, a complete sample 200 has been formed, and the sample 200 is disconnected from the blank 100. Due to the positioning and supporting effects of the putty material and the two-component polyurethane material, the sample 200 will not fall off the blank 100 during the processing of the second surface or after processing, and the sample 200 will not shift during processing, ensuring the accuracy of the sample processing.

[0039] Then, step S700 is performed: separating the sample 200 from the blank 100. This step can be achieved by heating (specifically, the blank 100 with the sample 200 can be placed in a heating chamber for heating) the two-component polyurethane material and the clay material to soften them, thereby separating the sample 200 from the blank 100 and from the two-component polyurethane material and the clay material. This achieves a simple separation operation and improves processing efficiency. Figure 4 The completed circular sample 200 is shown.

[0040] According to the sample processing method of this application, the clay adheres better to the sample surface after heating, and the two-component polyurethane has strong fixing and support strength. The composite fixing and support of the two makes it less likely to fall off the blank during the sample flipping process, and ensures the stable positioning of the sample, thus improving the accuracy of sample processing. In addition, the clay material can be reused, reducing processing and manufacturing costs and saving the development cost of the whole vehicle.

[0041] The following will illustrate further specific implementations, refinements, or improvements to the sample processing method through exemplary descriptions, in order to further improve its efficiency, reliability, or for other improvement considerations.

[0042] For example, in a preferred embodiment, the first contour 210 of the sample 200 may be cleaned before step S200 to remove residual dust and debris from the surface of the sample 200.

[0043] In a specific embodiment, the two-component polyurethane material comprises a material uniformly mixed from a polyurethane prepolymer and a curing agent in a 1:1 weight ratio, and cured within a maximum of 3 hours after mixing. Furthermore, the method of this application includes heating the putty material to 68 degrees Celsius to soften it before step S500, and then curing it after cooling at room temperature (e.g., approximately 25 degrees Celsius) for 3-4 hours after filling the putty material. Therefore, the processing method of this application has a shorter curing time, significantly reducing the curing time compared to traditional plaster-filled and fixed methods.

[0044] In addition, in step S500, the sludge material should be filled in a layer-by-layer manner, and the thickness of each layer of sludge material should not exceed 15mm. Air bubbles should be avoided between two layers of sludge to ensure the support and positioning strength of the sludge.

[0045] More specifically, the subtractive processing in steps S100 and S600 is performed by fixing the blank 100 on the worktable, such as by fixing the blank 100 with bolts.

[0046] Under this arrangement, the production efficiency of model prototypes is effectively improved according to this application, enabling rapid response to the design requirements of model prototypes, ensuring the production efficiency of thin-walled model prototypes with complex curved surfaces, and reducing scrap rate and model production costs.

[0047] The above examples primarily illustrate the sample processing method of this application. Although only some embodiments of this application have been described, those skilled in the art should understand that this application can be implemented in many other forms without departing from its spirit and scope. Therefore, the examples and embodiments shown are considered illustrative rather than restrictive, and this application may cover various modifications and substitutions without departing from the spirit and scope of the technical solution of this application.

Claims

1. A method for processing a prototype, wherein the prototype is a part of a vehicle model, the prototype being formed by a first contour and a second contour, characterized in that, The method includes the following steps: S100: Fix the blank on the worktable and perform subtractive processing from the back of the blank against the first surface of the worktable to form the first contour of the sample. S200: The first contour of the sample is covered by a spacer; S300: Select one or more reinforcing parts on the first contour of the sample according to the geometry of the sample; S400: The one or more reinforcing parts are covered with a two-component polyurethane material; S500: Fill the gap between the first contour of the sample and the portion of the blank other than the first contour of the sample with clay material to form a surface flush with the first surface of the blank. S600: After both the two-component polyurethane material and the putty material have cured, the blank is flipped over and subtractive processing is performed on the second surface of the blank opposite to the first surface to form the second contour of the sample. S700: Separate the sample from the blank.

2. The sample processing method according to claim 1, characterized in that, Step S700 includes: heating and curing the two-component polyurethane material and the putty material to soften them, and separating the sample from the blank.

3. The sample processing method according to claim 1, characterized in that, The two-component polyurethane material comprises a material uniformly mixed from a polyurethane prepolymer and a curing agent in a 1:1 weight ratio.

4. The sample processing method according to claim 3, characterized in that, The two-component polyurethane material is cured within a maximum of 3 hours after the polyurethane prepolymer and the curing agent are mixed.

5. The sample processing method according to claim 1, characterized in that, The method includes heating the sludge material to soften it prior to step S500.

6. The sample processing method according to claim 5, characterized in that, The method includes heating the sludge material to 68 degrees Celsius prior to step S500.

7. The sample processing method according to claim 5, characterized in that, The heated mud material solidifies after cooling at room temperature for 3-4 hours.

8. The sample processing method according to any one of claims 1-7, characterized in that, In step S500, the sludge material is filled in a layer-by-layer manner.

9. The sample processing method according to claim 8, characterized in that, Each layer of putty material is at most 15mm thick.

10. The sample processing method according to claim 1, characterized in that, The method includes cleaning the first contour of the sample before step S200.

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