Five-axis laser processing technology for VDI texture of rubber mold

Abstract

The invention discloses a five-axis laser machining process for VDI textures of a rubber mold. The five-axis laser machining process comprises the steps that A, the VDI texture type of a pressure bearing face of the mold is selected; step B, establishing a template central coordinate system through three-dimensional software, then designing a VDI texture surface for laser processing, covering a required area with the texture surface, and storing the texture surface as an STP format file of a curved surface; step C, opening the STP format file, carrying out gridding processing on the curved surface, extracting a needed gridding surface by changing an object layer, and exporting the gridding surface as an OBJ format file; according to the method, the texture is processed through five-axis laser, the high-precision processing effect can be achieved, the problems that the roughness is high and the precision is low due to the fact that the texture is processed through traditional chemical corrosion are solved, the processing efficiency of the mold texture is greatly improved, chemicals are not used in the laser processing process, environmental pollution is greatly reduced, and in the processing process, the quality of the mold texture is greatly improved. The laser processing state can be detected in real time, and the texture pattern drawing flexibility is high.

Description

Technical Field

[0001] The invention specifically relates to a five-axis laser processing technology for VDI texture of a rubber mold. Background Art

[0002] More and more automotive and electronic rubber products are used in our lives. With the improvement of market quality requirements, the quality requirements of rubber products are also an important link. Due to the rubber characteristics of the product, the phenomenon of sticking to the mold and the products sticking to each other often occurs, which has a great impact on the subsequent automated assembly. According to the understanding of the performance of rubber products, making corresponding VDI textures on the mold cavity surface can solve the problem of products sticking to each other, and making relatively rough textures on the mold pressure surface can prevent the overflow of rubber from sticking to the mold.

[0003] Existing textures are generally made by chemical corrosion, which causes serious environmental pollution. The control of precision and texture effects are all guaranteed by experience, which cannot meet the high-precision requirements of the current market. For this reason, we propose a five-axis laser processing technology for rubber mold VDI texture. Summary of the invention

[0004] The purpose of the present invention is to provide a five-axis laser processing technology for VDI texture of rubber mold to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solution: a five-axis laser processing process for VDI texture of rubber mold, comprising:

[0006] Step A: Select the VDI texture type for the mold pressure surface;

[0007] Step B: Use 3D software to establish the template center coordinate system, then design the VDI texture surface for laser processing, cover the required area with the texture surface, and save it as an STP format file of the surface;

[0008] Step C: Open the STP format file, mesh the surface, extract the required mesh surface by changing the object layer, and export it as an OBJ format file;

[0009] Step D: Flatten the mesh surface in the OBJ file to ensure that the flattened surface has correct geometric information;

[0010] Step E: Convert the flattened grid file into an image format, and then generate the starting RAW format file;

[0011] Step F: Open the original RAW file, create a new layer, hide the background layer, fill it with the corresponding VDI texture pattern, and then export it to the final RAW file;

[0012] Step G: Perform feature detection on the OBJ format file in step C and the mold entity in STL format, then input the process parameters to the five-axis laser machine, calculate the laser processing angle with given restrictions, and after feasible analysis, import and produce the final RAW format file to determine the leather grain attachment position. After confirmation, the five-axis laser machine outputs the laser for actual processing.

[0013] Preferably, in step A, the distance between the VDI texture type and the mold cavity is 0.3-0.5m.

[0014] Preferably, in step B, a central coordinate system is established by PORE software.

[0015] Preferably, in step C, the STP format file is opened by Rhinoceros software, and the processing surface direction is checked by using an analysis tool to ensure that the direction is upward. After checking that the processing surface direction is correct, the surface is meshed, and then a new layer is created, and the required mesh surface is extracted by changing the object layer.

[0016] Preferably, in the step D, the flattening process is performed by RizomUV software, and the processed content includes angle surfaces and arc surfaces.

[0017] Preferably, in step E, the image is converted into a picture format using ObjSnapshot software.

[0018] Preferably, in step F, VDI texture processing is performed using Photoshop software.

[0019] Preferably, in step G, feature detection and analysis are performed using Lastex.

[0020] Preferably, in step G, the mold is a three-dimensional entity.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] The present invention uses five-axis laser to process textures, which can achieve high-precision processing effects, thereby avoiding traditional chemical corrosion processing of textures, which leads to high roughness and low precision. The method greatly improves the processing efficiency of mold textures, has a high degree of automation, and does not use chemicals in the laser processing process, which greatly reduces environmental pollution. During the processing, the laser processing status can be detected in real time, and the flexibility of drawing texture patterns is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the structure of the texture processing surface of the distance cavity of the present invention;

[0024] Figure 2 It is a schematic diagram of the structure of the multi-cavity texture array of the present invention;

[0025] Figure 3 A schematic diagram of a mesh surface produced according to the present invention;

[0026] Figure 4 It is a schematic diagram of flattening a meshed surface according to the present invention;

[0027] Figure 5 A schematic diagram of a filling texture pattern of the present invention;

[0028] Figure 6 It is a schematic diagram of the local effect after the mold processing of the present invention. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] The present invention provides a technical solution: a five-axis laser processing technology for VDI texture of rubber mold, comprising:

[0031] Step A: Select the VDI texture type for the mold pressure surface;

[0032] Step B: Use 3D software to establish the template center coordinate system, then design the VDI texture surface for laser processing, cover the required area with the texture surface, and save it as an STP format file of the surface;

[0033] Step C: Open the STP format file, mesh the surface, extract the required mesh surface by changing the object layer, and export it as an OBJ format file;

[0034] Step D: Flatten the mesh surface in the OBJ file to ensure that the flattened surface has correct geometric information;

[0035] Step E: Convert the flattened grid file into an image format, and then generate the starting RAW format file;

[0036] Step F: Open the original RAW file, create a new layer, hide the background layer, fill it with the corresponding VDI texture pattern, and then export it to the final RAW file;

[0037] Step G: Perform feature detection on the OBJ format file in step C and the mold entity in STL format, then input the process parameters to the five-axis laser machine, calculate the laser processing angle with given restrictions, and after feasible analysis, import and produce the final RAW format file to determine the leather grain attachment position. After confirmation, the five-axis laser machine outputs the laser for actual processing.

[0038] Preferably, in step A, the distance between the VDI texture type and the mold cavity is 0.3-0.5m.

[0039] Preferably, in step B, a central coordinate system is established by PORE software.

[0040] Preferably, in step C, the STP format file is opened by Rhinoceros software, and the processing surface direction is checked by using an analysis tool to ensure that the direction is upward. After checking that the processing surface direction is correct, the surface is meshed, and then a new layer is created, and the required mesh surface is extracted by changing the object layer.

[0041] Preferably, in the step D, the flattening process is performed by RizomUV software, and the processed content includes angle surfaces and arc surfaces.

[0042] Preferably, in step E, the image is converted into a picture format using ObjSnapshot software.

[0043] Preferably, in step F, VDI texture processing is performed using Photoshop software.

[0044] Preferably, in step G, feature detection and analysis are performed using Lastex.

[0045] Preferably, in step G, the mold is a three-dimensional entity.

[0046] Comparative Example:

[0047] Five groups of molds were treated with chemical etching to form textures, and another five groups of molds were treated with the present invention by a five-axis laser robot to form textures, and then compared. The measured roughness effects are as follows:

[0048]

[0049]

[0050] From the above effects, it can be seen that the texture roughness of laser dermatoglyphics processing is lower, and compared with chemical etching, higher precision texture can be processed to ensure the accuracy of the mold texture.

[0051] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A five-axis laser processing technology for VDI texture of rubber mold, characterized in that: include: Step A: Select the VDI texture type for the mold pressure surface; Step B: Use 3D software to establish the template center coordinate system, then design the VDI texture surface for laser processing, cover the required area with the texture surface, and save it as an STP format file of the surface; Step C: Open the STP format file, mesh the surface, extract the required mesh surface by changing the object layer, and export it as an OBJ format file; Step D: Flatten the mesh surface in the OBJ file to ensure that the flattened surface has correct geometric information; Step E: Convert the flattened grid file into an image format, and then generate the starting RAW format file; Step F: Open the original RAW file, create a new layer, hide the background layer, fill it with the corresponding VDI texture pattern, and then export it to the final RAW file; Step G: Perform feature detection on the OBJ format file in step C and the mold entity in STL format, then input the process parameters to the five-axis laser machine, calculate the laser processing angle with given restrictions, and after feasible analysis, import and produce the final RAW format file to determine the leather grain attachment position. After confirmation, the five-axis laser machine outputs the laser for actual processing.

2. A five-axis laser processing process for VDI texture of rubber mold according to claim 1, characterized in that: In step A, the VDI texture type is 0.3-0.5m away from the mold cavity.

3. The five-axis laser processing technology for VDI texture of rubber mold according to claim 1 is characterized by: In the step B, a central coordinate system is established by using PORE software.

4. The five-axis laser processing technology for VDI texture of rubber mold according to claim 1 is characterized by: In step C, the STP format file is opened by Rhinoceros software, and the processing surface direction is checked by using analysis tools to ensure that the direction is upward. After checking that the processing surface direction is correct, the surface is meshed, and then a new layer is created. The required mesh surface is extracted by changing the object layer.

5. The five-axis laser processing technology for VDI texture of rubber mold according to claim 1 is characterized by: In the step D, the flattening process is performed by RizomUV software, and the processed content includes angle surfaces and arc surfaces.

6. The five-axis laser processing technology for VDI texture of rubber mold according to claim 1 is characterized by: In the step E, the image is converted into a picture format using ObjSnapshot software.

7. The five-axis laser processing technology for VDI texture of rubber mold according to claim 1 is characterized by: In the step F, VDI texture processing is performed using Photoshop software.

8. The five-axis laser processing technology for VDI texture of rubber mold according to claim 1 is characterized by: In the step G, feature detection and analysis are performed using Lastex.

9. The five-axis laser processing technology for VDI texture of rubber mold according to claim 1 is characterized by: In step G, the mold is a three-dimensional entity.

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