Machining method for GFRP laser cutting

Abstract

The invention provides a processing method for GFRP laser cutting, which ensures that the pattern appearance of a carbon fiber sub-component obtained by processing is accurate and reliable, reduces a cutting heat affected area and ensures the processing efficiency. The method is suitable for a carbon fiber component with the same cutting position of an upper carbon fiber layer and a lower carbon fiber layer, and is characterized in that the carbon fiber layer positioned on the upper carbon fiber layer is punctured by laser with smaller pulse energy; and then the carbon fiber sub-piece is integrally cut along the track of the carbon fiber layer stimulated by the upper carbon fiber layer with large pulse energy through laser.

Description

Technical Field

[0001] This invention relates to the technical field of carbon fiber component processing, specifically a GFRP laser cutting processing method. Background Technology

[0002] The structure of the carbon fiber sub-component (GFRP) is shown below. Figure 1 It consists of several layers of carbon fiber. In actual assembly, if there are two layers of carbon fiber components, when processing, it is necessary to form the corresponding pattern by laser cutting. The existing laser cutting method is to calculate the pulse energy required to penetrate the thickness of the two carbon fiber layers, and then directly cut the components with the calculated pulse energy. In actual operation, the area of ​​the upper carbon fiber layer that is affected by heat is relatively large, which will affect the outline of the entire pattern. Therefore, it is urgent to develop a GFRP laser cutting method that can reduce the heat-affected area during cutting. Summary of the Invention

[0003] To address the aforementioned problems, this invention provides a GFRP laser cutting processing method that ensures the accurate and reliable graphic appearance of the processed carbon fiber sub-components, reduces the heat-affected zone during cutting, and guarantees processing efficiency.

[0004] A GFRP laser cutting processing method is applicable to carbon fiber sub-components where the upper and lower carbon fiber layers are cut at the same location. The method is characterized by using a laser with a small pulse energy to penetrate the carbon fiber layer located in the upper carbon fiber layer, and then using a laser with a larger pulse energy to cut the carbon fiber sub-component as a whole along the trajectory of the penetrated carbon fiber layer.

[0005] Its further features are:

[0006] During the first laser cut, the laser uses a smaller pulse energy to cut the upper carbon fiber layer to obtain a cutting groove slightly smaller than the designed cutting width. Then, during the second laser cut, a larger pulse energy is used to penetrate the relatively small cutting groove of the upper carbon fiber layer to complete the cutting of the entire carbon fiber sub-part.

[0007] Before each laser cutting operation, a laser path that can complete the cut in one go is obtained in advance based on the laser trajectory, making the laser cutting process highly efficient.

[0008] During the second laser cut, the laser head is reset to the initial stage of the first laser cut, and the pulse energy is adjusted so that the laser cutting trajectory is the same as that of the first cut, thus reducing the complexity of the laser cutting trajectory.

[0009] During the second laser cutting and the first laser cutting, the height direction of the laser head does not need to be adjusted, which makes the laser operation convenient and quick.

[0010] The pulse energy corresponding to the second laser cutting penetrates the cutting groove of the upper carbon fiber layer and directly heats the lower carbon fiber layer, causing the lower carbon fiber layer to form a cutting groove of a set width.

[0011] Using this method, the laser processing layer is set to a dual-layer, dual-parameter configuration. First, a smaller single-pulse energy is used to penetrate the carbon fiber structure of the upper carbon fiber layer to obtain a cutting groove. Then, a larger single-pulse energy is used to perform overall cutting to obtain a cutting groove of the set shape. This ensures that the processed carbon fiber sub-parts have an accurate and reliable graphic appearance, reduces the heat-affected zone during cutting, and guarantees processing efficiency. Attached Figure Description

[0012] Figure 1 Exploded view of an existing carbon fiber sub-component with two carbon fiber layers;

[0013] The names corresponding to the serial numbers in the diagram are as follows:

[0014] Upper carbon fiber layer 1, lower carbon fiber layer 2. Detailed Implementation

[0015] A GFRP laser cutting method is applicable to carbon fiber sub-components where the upper carbon fiber layer 1 and the lower carbon fiber layer 2 are cut at the same location (see...). Figure 1 The process involves first penetrating the upper carbon fiber layer 1 on the surface with a laser using a small pulse energy, and then using a laser with a larger pulse energy to cut the carbon fiber sub-component as a whole along the trajectory of the carbon fiber layer that was penetrated by the upper carbon fiber layer 1.

[0016] In practice: during the first laser cut, the laser uses a smaller pulse energy to cut the upper carbon fiber layer 1 to obtain a cutting groove slightly smaller than the designed cutting width. Then, during the second laser cut, a larger pulse energy is used to penetrate the relatively small cutting groove of the upper carbon fiber layer 1 to complete the cutting of the entire carbon fiber sub-part.

[0017] Before each laser cutting operation, a laser path that can complete the cut in one go is obtained in advance based on the laser trajectory, making the laser cutting process highly efficient.

[0018] During the second laser cut, the laser head is reset to the initial stage of the first laser cut, and the pulse energy is adjusted so that the laser cutting trajectory is the same as that of the first cut, thus reducing the complexity of the laser cutting trajectory.

[0019] The height of the laser head does not need to be adjusted during the second laser cut and the first laser cut, which makes laser operation convenient and quick.

[0020] The pulse energy corresponding to the second laser cut penetrates the cutting groove of the upper carbon fiber layer and directly heats and cuts the lower carbon fiber layer, so that the lower carbon fiber layer forms a cutting groove of a set width.

[0021] In practice, when the carbon fiber sub-component has four layers (generally, carbon fiber sub-components are set with an even number of carbon fiber layers), after the four carbon fiber layers are stacked and assembled, the frame, upper plate, and lower plate are not assembled first. The upper two carbon fiber layers are cut using the above method. Then, the four carbon fiber layers of the entire carbon fiber sub-component are flipped over and the two carbon fiber layers on the reverse side are laser-cut using the above method. After that, the frame, upper plate, and lower plate are assembled.

[0022] The laser processing layer is set to a dual-layer, dual-parameter configuration. First, a smaller single-pulse energy is used to penetrate the carbon fiber structure of the upper carbon fiber layer to obtain a cutting groove. Then, a larger single-pulse energy is used to perform overall cutting to obtain a cutting groove of the set shape. This ensures that the processed carbon fiber sub-parts have an accurate and reliable graphic appearance, reduces the heat-affected zone during cutting, and guarantees processing efficiency.

[0023] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0024] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A method for laser cutting GFRP, applicable to carbon fiber sub-components where the upper and lower carbon fiber layers are cut at the same location, characterized in that... The carbon fiber layer located on the upper carbon fiber layer is penetrated by a laser with a small pulse energy, and then the carbon fiber sub-component is cut as a whole along the trajectory of the carbon fiber layer penetrated by the laser with a larger pulse energy.

2. The processing method for GFRP laser cutting according to claim 1, characterized in that: During the first laser cut, the laser uses a smaller pulse energy to cut the upper carbon fiber layer, creating a groove slightly smaller than the designed cutting width. In the second laser cut, a larger pulse energy is used to penetrate the relatively small groove in the upper carbon fiber layer, completing the cutting of the entire carbon fiber component.

3. The processing method for GFRP laser cutting according to claim 2, characterized in that: Before each laser cut, a laser path that can complete the cut in one go is obtained in advance based on the laser trajectory.

4. The processing method for GFRP laser cutting according to claim 3, characterized in that: During the second laser cut, the laser head is reset to the initial stage of the first laser cut, and the pulse energy is adjusted so that the laser cutting trajectory is the same as that of the first cut.

5. The processing method for GFRP laser cutting according to claim 4, characterized in that: The height direction of the laser head does not need to be adjusted during the second laser cutting and the first laser cutting.

6. The processing method for GFRP laser cutting according to claim 2, characterized in that: The pulse energy corresponding to the second laser cutting penetrates the cutting groove of the upper carbon fiber layer and directly heats the lower carbon fiber layer, causing the lower carbon fiber layer to form a cutting groove of a set width.

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