A processing method for composite material thin plate and composite material thin plate

Abstract

The present invention relates to the technical field of composite material processing, and discloses a composite material thin plate processing method and a composite material thin plate, wherein the composite material thin plate processing method comprises the following steps: step S1, placing a workpiece to be processed on a sacrificial layer; step S2, a tool assembly cuts the workpiece to be processed according to a preset path, and extends into the sacrificial layer to cut the workpiece to be processed into a composite material thin plate of a preset shape. The composite material thin plate processing method cuts off the fiber reinforcement phase and the resin matrix of the workpiece to be processed by the shearing action of the tool assembly during cutting, and does not generate burrs, and has good processing quality. In addition, the composite material thin plate processing method can cut the workpiece to be processed at a relatively high cutting speed without affecting the processing quality of the workpiece to be processed, and has high processing efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of composite material processing, and in particular to a processing method of a composite material thin plate and the composite material thin plate. Background Art

[0002] Aircraft cargo hold linings are usually made of glass fiber composite materials. Glass fiber composite materials are difficult to process, and are mainly composed of a fiber reinforcement phase and a resin matrix. Among them, the fiber reinforcement phase has high strength and is not easily cut directly by the blade during milling and other processing. Instead, it deforms and eventually breaks under the action of the blade, and the bending position deviates from the preset processing position, which makes it easy to generate a large number of burrs during processing, greatly reducing the processing quality. In addition, parts such as aircraft cargo hold linings are often thin and have weak rigidity. They are easily deformed under the action of cutting forces, which further promotes the formation of burrs and poor processing quality. Summary of the invention

[0003] An object of the present invention is to provide a method for processing a composite material thin plate, which has high processing efficiency and good processing quality.

[0004] To this end, the present invention adopts the following technical solutions:

[0005] A method for processing a composite material thin plate comprises the following steps:

[0006] Step S1, placing a workpiece to be processed on a sacrificial layer;

[0007] Step S2: The tool assembly cuts the workpiece to be processed according to a preset path and extends into the sacrificial layer to cut the workpiece to be processed into a composite material sheet of a preset shape.

[0008] As a preferred solution of a method for processing a composite material thin plate, the axial cutting depth H of the tool assembly is greater than the thickness h of the workpiece to be processed, and less than the sum of the thickness d of the sacrificial layer and the thickness h of the workpiece to be processed.

[0009] As a preferred solution of a method for processing a composite material sheet, the composite material sheet is provided with an inner corner, and the specific steps of processing the inner corner in step S2 include:

[0010] Step S201, the tool assembly includes a first tool, and the overcutting amount W of the blade of the first tool is determined according to the axial cutting depth H;

[0011] Step S202, the preset path includes a first preset path along the contour of the inner angle, the first preset path includes two cut-out points, the two cut-out points are both located on the contour of the inner angle, and the distance between each of the cut-out points and the vertex of the inner angle is equal to the blade overcut amount W, the first tool cuts from the first end and the second end of the inner angle to the vertex of the inner angle according to the first preset path, and cuts the workpiece to be processed to the corresponding cut-out points, and cuts the workpiece to be processed between the two cut-out points and the vertex of the inner angle by the blade of the first tool.

[0012] As a preferred solution of a method for processing a composite material thin plate, the first cutting tool is a double-edged cutting tool.

[0013] As a preferred solution of a method for processing a composite material sheet, before step S201, the method further includes:

[0014] Step S200: establishing a functional relationship between the axial cutting depth H and the blade overcut amount W.

[0015] As a preferred solution of a method for processing a composite material sheet, the composite material sheet is provided with an inner corner, and the specific steps of processing the inner corner in step S2 include:

[0016] Step S211, the tool assembly includes a second tool and a third tool, the preset path includes a second preset path and a third preset path, the second preset path and the third preset path are both set along the contour of the inner angle, the second preset path includes a first entry point, the first entry point is located on the second preset path, and the distance between the first entry point and the vertex of the inner angle is P1, the second tool cuts into the workpiece to be processed from the first entry point, and cuts the workpiece to be processed toward the first end of the inner angle according to the second preset path;

[0017] Step S212, the third preset path includes a second entry point, the second entry point is located on the third preset path and the distance between the second entry point and the vertex of the inner angle (1) is P2, the third tool cuts into the workpiece to be processed from the second entry point, and cuts the workpiece to be processed toward the second end of the inner angle along the third preset path.

[0018] As a preferred embodiment of a method for processing a composite material thin plate, the second tool and the third tool are both single-edged tools, P1 is equal to the distance between the projections of the tip of the second tool and the center axis of the tool handle on the horizontal plane, and P2 is equal to the distance between the projections of the tip of the third tool and the center axis of the tool handle on the horizontal plane.

[0019] As a preferred solution of a method for processing a composite material thin plate, the step S2 specifically comprises:

[0020] The tool assembly cuts the workpiece to be processed multiple times along the preset path.

[0021] As a preferred solution of a method for processing a composite material thin plate, the tool assembly is driven by a servo motor or a CNC machine tool.

[0022] Beneficial effects of the present invention:

[0023] The present invention provides a method for processing a composite material sheet, which cuts off the fiber reinforcement phase and the resin matrix of the workpiece to be processed by the shearing action of the tool assembly during the cutting, does not generate burrs, and has good processing quality. In addition, the method for processing a composite material sheet can cut the workpiece to be processed at a relatively high cutting speed without affecting the processing quality of the workpiece to be processed, and has high processing efficiency.

[0024] The invention also provides a composite material thin plate with good processing quality and high processing efficiency.

[0025] To this end, the present invention adopts the following technical solutions:

[0026] A composite material thin plate is made by adopting the processing method of the composite material thin plate.

[0027] Beneficial effects of the present invention:

[0028] The composite material thin plate provided by the present invention is manufactured by adopting the above-mentioned composite material thin plate processing method, and does not generate burrs, has good processing quality and high processing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 is a flow chart of a method for processing a composite material thin plate provided in Embodiment 1 of the present invention;

[0030] Figure 2 is a schematic diagram of processing a composite material thin plate provided in Example 1 of the present invention;

[0031] Figure 3 is a schematic structural diagram of the inner corner of a composite material thin plate provided in Example 1 of the present invention;

[0032] Figure 4 is a schematic structural diagram of a double-edged knife provided in Embodiment 1 of the present invention;

[0033] Figure 5 is a schematic structural diagram of a single-edged knife provided in Embodiment 1 of the present invention;

[0034] Figure 6 It is a structural schematic diagram of the cut-out point of the inner angle provided in the first embodiment of the present invention;

[0035] Figure 7 It is a structural schematic diagram of the first entry point and the second entry point of the inner angle provided by the second embodiment of the present invention.

[0036] In the figure:

[0037] 1-interior angle; 11-first end; 12-second end; 13-vertex;

[0038] 2- Cut-out point;

[0039] 31-first entry point; 32-second entry point;

[0040] 100-composite material sheet;

[0041] 200- knife assembly; 201- double-edged knife; 202- single-edged knife. DETAILED DESCRIPTION

[0042] 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 embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0043] like Figure 1-Figure 7 As shown, this embodiment provides a method for processing a composite material thin plate, and the method for processing a composite material thin plate includes the following steps:

[0044] Step S1, placing a workpiece to be processed on a sacrificial layer;

[0045] Step S2 : The tool assembly 200 cuts the workpiece to be processed according to a preset path and extends into the sacrificial layer to cut the workpiece to be processed into a composite material sheet 100 of a preset shape.

[0046] The processing method of the composite material sheet adopts the tool assembly 200 to cut the workpiece to be processed according to a preset path, and the workpiece to be processed is cut by the shearing force between the tool assembly 200 and the workpiece to be processed, which can avoid the fiber reinforcement phase of the workpiece to be processed from being difficult to cut due to excessive deformation and forming burrs, and the processing quality is good. In addition, because the shearing direction of the tool assembly 200 and the feeding direction of the tool assembly 200 do not overlap, the tool assembly 200 can adopt a larger feed without affecting the processing quality of the composite material sheet 100, which can improve the processing efficiency of the composite material sheet 100.

[0047] In this embodiment, the workpiece to be processed specifically refers to a glass fiber reinforced phenolic sheet blank. Of course, the application scope of the composite material sheet processing method is not limited thereto, and can also be used to process other types of composite material sheets 100, which is not limited in this embodiment.

[0048] Exemplarily, the cutter assembly 200 is driven by a servo motor or a CNC machine tool, has high processing efficiency, large cutting force, and can ensure the motion accuracy of the cutter assembly 200, thereby ensuring the processing quality of the composite material sheet 100. Of course, the drive mode of the cutter assembly 200 is not limited to this. In other embodiments, the composite material sheet 100 can also be cut manually or by a mechanical arm. It can be set according to actual needs, and this embodiment does not limit this.

[0049] Preferably, the axial cutting depth H of the tool assembly 200 is greater than the thickness h of the workpiece to be processed, and less than the sum of the thickness d of the sacrificial layer and the thickness h of the workpiece to be processed, which can ensure that the tool assembly 200 cuts off the workpiece to be processed without affecting the external supporting device under the workpiece to be processed.

[0050] The sacrificial layer material can provide a certain support to the workpiece to be processed and is easy to cut without affecting the normal cutting of the tool assembly 200 .

[0051] It is understandable that the workpiece to be processed is tightly attached to the sacrificial layer, which can avoid excessive deformation of the workpiece to be processed during the slicing process. On the one hand, it can ensure the contour accuracy of the composite material sheet 100, and on the other hand, it can avoid the fiber reinforcement phase of the workpiece to be processed from being deformed and difficult to cut, resulting in burrs. Exemplarily, the workpiece to be processed is pasted on the sacrificial layer, with good lamination effect, low cost and convenient operation. Of course, the lamination method of the workpiece to be processed and the sacrificial layer is not limited to this. In other embodiments, a pressure plate or other structure can be used to press the workpiece to be processed onto the sacrificial layer. It can be set according to actual processing needs, and this embodiment does not limit this.

[0052] Furthermore, an inner corner 1 is provided on the composite material sheet 100. It should be noted that the preset path of the tool assembly 200 is formed by the moving trajectory of the central axis of the tool handle in the horizontal plane, and there is a certain distance d between the projections of the central axis of the tool handle and the blade on the cutting plane. When the blade cuts toward the vertex 13 of the inner corner 1, if the preset path is set directly according to the contour of the inner corner 1, the blade of the tool assembly 200 will overcut at the vertex 13 of the inner corner 1, so that the actual processing contour is larger than the contour of the inner corner 1. At this time, the overcut amount W of the blade of the tool assembly 2 is equal to the distance d between the central axis of the tool handle and the projection of the blade on the cutting plane.

[0053] In order to avoid overcutting and ensure the processing quality of inner angle 1, Figure 3 Combination Figure 6 As shown, the specific steps of processing the inner angle 1 in step S2 include:

[0054] Step S201, the tool assembly 200 includes a first tool, and the overcutting amount W of the blade of the first tool is determined by the axial cutting depth H;

[0055] Step S202, the preset path includes a first preset path along the contour of the inner corner 1, the first preset path includes two cut-out points 2, the two cut-out points 2 are both located on the contour of the inner corner 1, and the distance between each cut-out point 2 and the vertex 13 of the inner corner 1 is the blade overcut amount W, the first tool cuts from the first end 11 and the second end 12 of the inner corner 1 to the vertex 13 of the inner corner 1 according to the first preset path, and cuts the workpiece to be processed to the corresponding cut-out point 2 respectively, and the workpiece to be processed between the two cut-out points 2 and the vertex 13 of the inner corner 1 is cut off by the blade of the first tool. On the one hand, it can ensure the processing quality of the inner corner 1 and avoid overcutting that affects the processing accuracy and strength of the composite material sheet 100. On the other hand, it can also reduce the length of the motion trajectory of the first tool, thereby improving the processing efficiency of the composite material sheet 100.

[0056] The contour of the inner angle 1 away from the vertex angle may be a straight line or a curve, which is not limited in this embodiment.

[0057] Preferably, if Figure 4 As shown, the first tool is a double-edged tool 201. The double-edged tool 201 has good rigidity and good stability during processing and is suitable for long-distance processing.

[0058] Of course, the type of the first tool is not limited to this, such as Figure 5 As shown, in other embodiments, the first tool may also include two single-edged knives 202, one of which is cut from the first end 11 of the inner corner 1 along the first preset path to the vertex 13 of the inner corner 1 to the corresponding cut-out point 2, and the other single-edged knife 202 is cut from the second end 12 of the inner corner 1 along the first preset path to the vertex 13 of the inner corner 1 to the corresponding cut-out point 2, and the cutting edges of the two single-edged knives 202 are used to cut the material to be processed between the two cut-out points 2 and the vertex 13 of the inner corner 1. The first single-edged knife 202 may also cut in from any position between the first end 11 of the inner corner 1 and the corresponding cut-out point 2, and cut toward the vertex 13 of the inner corner 1, which may be set according to actual needs, and this embodiment does not limit this.

[0059] It can be understood that one side of the single-edged knife 202 is a plane, and the tip of the single-edged knife 202 is located on the plane, and the other side has a certain curvature. During the cutting process, the plane of the single-edged knife 202 fits the contour of the inner corner 1, and the two single-edged knives 202 are in a mirror-symmetrical relationship. In addition, the sizes of the two single-edged knives 202 can be different or the same, and can be set according to actual needs, which is not limited in this embodiment.

[0060] Preferably, before step S201, the following steps are also included:

[0061] Step S200, establishing a functional relationship between the axial cutting depth H and the blade overcutting amount W. After obtaining the functional relationship between the axial cutting depth H and the blade overcutting amount W, the axial cutting depth H can be determined by the tool setting process, thereby directly obtaining the blade overcutting amount W, which has high processing efficiency.

[0062] The functional relationship between the axial cutting depth H and the blade overcut amount W can be obtained from a tool manual provided by a tool manufacturer, or can be calculated from the inclination angle of the blade of the tool assembly 200 .

[0063] Furthermore, since the tool assembly 200 will wear after cutting a certain distance, affecting the calculation of the blade overcut amount W, establishing a functional relationship between the blade overcut amount W and the axial cutting depth H and the degree of wear can further improve the processing accuracy of the inner corner 1 of the composite material sheet 100.

[0064] This embodiment further provides a composite material thin plate 100, which is manufactured by the above-mentioned composite material thin plate processing method, and has high processing efficiency and good processing quality.

[0065] Embodiment 2

[0066] This embodiment provides a method for processing a composite material thin plate. The difference between the method for processing a composite material thin plate and the method for processing the composite material thin plate in the first embodiment is that the processing method of the inner corner 1 is different.

[0067] Specifically, if Figure 3 Combination Figure 7 As shown, the specific steps of processing the inner angle 1 in step S2 include:

[0068] Step S211, the tool assembly 200 includes a second tool and a third tool, the preset path includes a second preset path and a third preset path, the second preset path and the third preset path are both set along the contour of the inner corner 1, the second preset path includes a first entry point 31, the first entry point 31 is located on the second preset path, and the distance between the first entry point 31 and the vertex 13 of the inner corner 1 is P1, the second tool cuts into the workpiece to be processed at the first entry point 31, and cuts the workpiece to be processed toward the first end 11 of the inner corner 1 according to the second preset path;

[0069] Step S212, the third preset path includes a second entry point 32, the second entry point 32 is located on the third preset path and the distance between the second entry point 32 and the vertex 13 of the inner angle 1 is P2, the third tool cuts into the workpiece to be processed from the second entry point 32, and cuts the workpiece to be processed toward the second end 12 of the inner angle 1 according to the third preset path.

[0070] The inner corner 1 is processed by cutting from the vertex 13 of the inner corner 1 toward the first end 11 and the second end 12 of the inner corner 1. The processing quality of the inner corner 1 can be guaranteed by precise tool setting. The moving accuracy requirement of the tool assembly 200 is low, and the processing quality of the inner corner 1 is good.

[0071] Preferably, the second tool and the third tool are both single-edged tools 202, the distance P1 between the first entry point 31 and the vertex 13 of the inner angle 1 is equal to the distance between the projections of the tip of the second tool and the central axis of the tool handle on the horizontal plane, and the distance P2 between the second entry point 32 and the vertex 13 of the inner angle 1 is equal to the distance between the projections of the tip of the third tool and the central axis of the tool handle on the horizontal plane.

[0072] Take the second tool as an example. Since the distance P1 between the first entry point 31 and the vertex 13 of the inner corner 1 is equal to the distance between the projections of the tool tip and the center axis of the tool handle on the horizontal plane, and the tool tip and the plane of the single-edged tool 202 coincide, when the single-edged tool 202 cuts into the workpiece to be processed from the first entry point 31, the tool tip and the plane of the single-edged tool 202 are both located on the contour of the inner corner 1, and no overcutting occurs; in addition, the distance P1 between the first entry point 31 and the vertex 13 of the inner corner 1 is a fixed value, which has nothing to do with the axial cutting depth H. There is no need to obtain the functional relationship between the blade overcut amount W and the axial cutting depth H in advance. It is only necessary to consider the distance between the center axis of the tool handle and the projection of the tool tip on the horizontal plane, which can improve the processing efficiency of the inner corner 1, thereby improving the processing efficiency of the composite material sheet 100.

[0073] Of course, the types of the second tool and the third tool are not limited thereto. In other embodiments, the second tool and the third tool can also be double-edged tools 201. The first double-edged tool 201 cuts into the workpiece to be processed from the first entry point 31 on the second preset path, and the distance P1 between the first entry point 31 and the vertex 13 of the inner angle 1 is equal to the blade overcutting amount W of the first double-edged tool 201, and cuts from the first entry point 31 to the first end 11 of the inner angle 1; the second double-edged tool 201 cuts into the workpiece to be processed from the second entry point 32 on the third preset path, and the distance between the second entry point 32 and the vertex 13 of the inner angle 1 is equal to the blade overcutting amount W of the second double-edged tool 201, and cuts from the second entry point 32 to the second end 12 of the inner angle 1, thereby completing the processing of the inner angle 1. Among them, the first double-edged knife 201 and the second double-edged knife 201 can be the same double-edged knife 201, or they can be different double-edged knives 201. When the first double-edged knife 201 and the second double-edged knife 201 are different double-edged knives 201, the first double-edged knife 201 and the second double-edged knife 201 can also have different sizes, which can be set according to actual needs, and this embodiment does not limit this.

[0074] It can be understood that, since one of the two blades is located on the contour of the inner corner 1 when the first double-edged knife 201 cuts from the first entry point 31, and the blade is inclined, it is necessary to obtain the functional relationship between the blade overcut amount W and the axial cutting depth H of the first double-edged knife 201, so as to determine the distance P1 between the first entry point 31 and the vertex 13 of the inner corner 1. Similarly, it is necessary to obtain the functional relationship between the blade overcut amount W and the axial cutting depth H of the second double-edged knife 201, so as to obtain the distance P2 between the second entry point 32 and the vertex 13 of the inner corner 1.

[0075] This embodiment further provides a composite material thin plate 100, which is manufactured by the above-mentioned composite material thin plate processing method, and has high processing efficiency and good processing quality.

[0076] In the description herein, it should be understood that the terms "upper", "lower", "right" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the structure referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0077] In the description of this specification, the description with reference to the terms "an embodiment", "example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example.

[0078] In addition, the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A method for processing a composite material thin plate, characterized in that: The steps include: Step S1, placing a workpiece to be processed on a sacrificial layer; Step S2, the tool assembly (200) cuts the workpiece to be processed according to a preset path and extends into the sacrificial layer to cut the workpiece to be processed into a composite material sheet of a preset shape; The axial cutting depth H of the tool assembly (200) is greater than the thickness h of the workpiece to be processed, and less than the sum of the thickness d of the sacrificial layer and the thickness h of the workpiece to be processed; The composite material sheet is provided with an inner corner (1), and the specific steps of processing the inner corner (1) in step S2 include: Step S201: the tool assembly (200) comprises a first tool, and an overcutting amount W of a blade of the first tool is determined according to the axial cutting depth H; Step S202, the preset path includes a first preset path along the contour of the inner corner (1), the first preset path includes two cut-out points (2), the two cut-out points (2) are both located on the contour of the inner corner (1), and the distance between each of the cut-out points (2) and the vertex (13) of the inner corner (1) is equal to the blade overcut amount W, the first tool cuts from the first end (11) and the second end (12) of the inner corner (1) to the vertex (13) of the inner corner (1) according to the first preset path, and cuts the workpiece to be processed to the corresponding cut-out points (2), and cuts the workpiece to be processed between the two cut-out points (2) and the vertex (13) of the inner corner (1) by the blade of the first tool.

2. The method for processing a composite material sheet according to claim 1, characterized in that: The first cutting tool is a double-edged cutting tool (201).

3. The method for processing a composite material sheet according to claim 1, characterized in that: Before step S201, the following steps are also included: Step S200: establishing a functional relationship between the axial cutting depth H and the blade overcut amount W.

4. The method for processing a composite material sheet according to claim 1, characterized in that: The composite material sheet is provided with an inner corner (1), and the specific steps of processing the inner corner (1) in step S2 include: Step S211, the tool assembly (200) comprises a second tool and a third tool, the preset path comprises a second preset path and a third preset path, the second preset path and the third preset path are both arranged along the contour of the inner corner (1), the second preset path comprises a first entry point (31), the first entry point (31) is located on the second preset path, and the distance between the first entry point (31) and the vertex (13) of the inner corner (1) is P1, the second tool cuts into the workpiece to be processed from the first entry point (31), and cuts the workpiece to be processed toward the first end (11) of the inner corner (1) according to the second preset path; Step S212, the third preset path includes a second entry point (32), the second entry point (32) is located on the third preset path and the distance between the second entry point (32) and the vertex (13) of the inner angle (1) is P2, the third tool cuts into the workpiece to be processed from the second entry point (32), and cuts the workpiece to be processed toward the second end (12) of the inner angle (1) according to the third preset path.

5. The method for processing a composite material sheet according to claim 4, characterized in that: The second tool and the third tool are both single-edged tools (202), P1 is equal to the distance between the projections of the tool tip and the center axis of the tool handle on the horizontal plane, and P2 is equal to the distance between the projections of the tool tip and the center axis of the tool handle on the horizontal plane.

6. The method for processing a composite material sheet according to any one of claims 1 to 5, characterized in that: The step S2 specifically includes: The tool assembly (200) cuts the workpiece to be processed multiple times along the preset path.

7. The method for processing a composite material sheet according to any one of claims 1 to 5, characterized in that: The tool assembly (200) is driven by a servo motor or a numerically controlled machine tool.

8. A composite material sheet, characterized in that: The composite material sheet is manufactured by the processing method of any one of claims 1 to 7.

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