Processing method of porous fiber reinforced resin-based composite material

Abstract

The invention relates to the technical field of composite material processing, in particular to a porous fiber reinforced resin matrix composite material processing method which comprises the following steps: stacking a plurality of porous fiber reinforced resin matrix composite materials, ensuring that the edges are flush, and pressing and fixing the peripheries of the edges to obtain a to-be-processed part; the workpiece to be machined is subjected to diamond wire cutting, and cutting is conducted under the conditions that the feeding speed of a diamond wire is controlled to range from 5 m / s to 45 m / s, the feeding speed ranges from 12 mm < 2 > / min to 15 mm < 2 > / min, and the tensile force ranges from 150 N to 200 N; in the diamond wire, the particle size of diamond is 30-45 microns. By means of the method, the problem that the blanking edge is damaged can be effectively solved, meanwhile, multiple samples can be cut at a time, and the working efficiency is effectively improved.

Description

Technical Field

[0001] The present invention relates to the technical field of composite material processing, and in particular to a processing method of a porous fiber-reinforced resin-based composite material. Background Art

[0002] Wet paper-based friction materials are porous fiber-reinforced resin-based composite materials with a porosity exceeding 40%. Wet paper-based friction materials are typically produced using a papermaking process to create a preform, followed by gluing and heat curing to produce a continuous sheet with a thickness of 0.4mm to 1.0mm. Wet paper-based friction material products typically consist of a sandwich structure with an annular steel core plate bonded to two sides of the wet paper-based friction material. The steel core plate is 0.8mm to 2.0mm thick, while the wet paper-based friction material is 0.4mm to 1.0mm thick, resulting in a product thickness of 1.6 to 4.0mm. The wet paper-based friction material in a wet paper-based friction material product can be a single ring or a combination of multiple ring segments.

[0003] In the existing art, the main methods for cutting wet paper-based friction materials are die stamping or knife die stamping. Typically, a single sheet of wet paper-based friction material with a thickness of 0.4mm to 1.0mm is placed in a punch press equipped with a stamping die or a knife die, and then punched out to produce an annular friction material or an annular friction material that can be spliced together in multiple sections. Because die stamping or knife die stamping can only be performed on a single sheet, production efficiency is low. Furthermore, die stamping or knife die stamping can physically squeeze the material's edges, causing damage to the cut edges. This damage reduces the material's strength and structural integrity, thereby shortening the fatigue life of the product. Consequently, during bench testing, the material, which should have passed 200 hours of testing, exhibited chipping and fragmentation before 200 hours, seriously impacting its performance and service life. On the other hand, when bonding multiple sections of wet paper-based friction material to an annular steel core sheet, there will be sharp angles or large angle changes at the splicing edges, and the mechanical damage to the punched edges will be greater, seriously affecting the fatigue life of the product; the processing process uses a large-tonnage punch press, which consumes high energy. Summary of the Invention

[0004] In order to solve the problem in the prior art that the edges of porous fiber-reinforced resin-based composite materials may be damaged during mold stamping or knife die stamping of porous fiber-reinforced resin-based composite materials, thereby affecting the service life of subsequent products, the present invention provides a processing method for porous fiber-reinforced resin-based composite materials.

[0005] In order to achieve the above-mentioned purpose of the invention, the technical solution of the present invention is specifically as follows.

[0006] A method for processing a porous fiber-reinforced resin-based composite material comprises the following steps: Stacking and fixing multiple porous fiber-reinforced resin-based composite materials to obtain a workpiece to be processed; The workpiece is cut with diamond wire, and the cutting speed of the diamond wire is controlled between 5m / s and 45m / s, and the feed speed is 12mm. 2 / min~15mm 2 / min, and the tension is 150N~200N. In the diamond wire, the particle size of diamond is 30 μm to 45 μm.

[0007] The porous fiber reinforced resin matrix composite material in the present invention is a brittle material. By strictly controlling the cutting speed of the diamond wire to 5m / s~15m / s and the feed speed to 12mm 2 / min~15mm 2 Cutting porous fiber-reinforced resin-based composites with diamond wires having a particle size of 30μm to 45μm, using a process speed of 500N / min and a tension of 150N to 200N, effectively solves the existing problem of edge damage and burrs caused by punching or die-cutting methods, which affects the material's performance, while also improving cutting precision and efficiency. Diamonds with a particle size of 30μm to 45μm have higher cutting edge strength and chip space, making them suitable for fast cutting. The continuous, flexible cutting of the diamond wire reduces local stress concentrations, thereby minimizing damage caused by stress concentration. Cutting at a speed of 5m / s to 45m / s reduces the cutting force of individual diamond particles, minimizing the risk of thermal softening of porous fiber-reinforced resin-based composites and preventing burning or sticking. Cutting with a tension of 150N to 200N ensures that the diamond wire maintains a stable trajectory during cutting, preventing deviation and thus improving cutting accuracy. This invention, through precise parameter control, allows diamond wire cutting to be used for cutting brittle materials. This not only allows diamond wire cutting to be applied to brittle materials for the first time, but also eliminates burrs on the cut edges. Furthermore, stacking multiple porous fiber-reinforced resin-based composite materials allows them to be cut simultaneously, significantly improving work efficiency.

[0008] In another preferred embodiment, the diameter of the diamond wire is 0.1 mm to 0.5 mm. If the diameter of the diamond wire is too thick, it will cause significant damage to the material during the cutting process, causing damage or cracks on the edge. If the diameter of the diamond wire is too thin, the cutting efficiency will be reduced.

[0009] In another preferred embodiment, the diamond wire is a resin-type diamond wire.

[0010] In another preferred embodiment, the diamond wire has a cutting edge height of 25% to 30% of the diamond particle size. At this cutting edge height, the diamond particles penetrate deeply into the workpiece, increasing the amount of cutting per pass and improving cutting efficiency.

[0011] In another preferred embodiment, the cutting clearance of the diamond wire is 0.15 mm to 0.5 mm.

[0012] In another preferred embodiment, the porous fiber-reinforced resin-based composite material is stacked in a number of 10 to 500 sheets. Too few sheets results in low production efficiency; too many require diamond wire with higher tensile strength to increase its pulling force, significantly increasing costs. Furthermore, this also requires more space for the equipment.

[0013] In another preferred embodiment, the thickness of the porous fiber-reinforced resin-based composite material is 0.4 mm to 2.5 mm.

[0014] In another preferred embodiment, the slit width during the cutting process is 0.15 mm to 0.50 mm.

[0015] In another preferred embodiment, the cutting mode of the diamond wire cutting is unidirectional or reciprocating.

[0016] Compared with the prior art, the present invention has the following beneficial effects.

[0017] (1) The present invention uses diamond wire to cut porous fiber-reinforced resin-based composite materials. By controlling the cutting speed of the diamond wire to 5m / s~45m / s, the cutting force of a single diamond particle can be reduced, and the risk of thermal softening of the porous fiber-reinforced resin matrix and fiber pullout or delamination can be reduced. Diamonds with a particle size of 30μm~45μm have higher cutting edge strength and chip space. 2 / min~15mm 2 Cutting at a feed rate of 100 / min can control the material removal rate, reduce burrs and edge collapse, and maintain the integrity of the cut surface, thereby effectively ensuring the completion of the cutting edge and avoiding damage and burr problems. Under a tension of 150N~200N, it can ensure that the diamond wire maintains a stable trajectory during cutting, thereby effectively improving the cutting accuracy and achieving the cutting of multiple porous fiber-reinforced resin-based composite materials at one time. The edges after cutting will not be damaged, effectively solving the problem of edge damage caused by physical extrusion in mold stamping or knife die stamping, which in turn affects the service life.

[0018] (2) The method of the present invention can be used to cut 50 to 200 sheets of porous fiber-reinforced resin-based composite materials at a time, and the edges after cutting are free of burrs and damage, which effectively improves the use effect of the material. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 Schematic diagram of the porous fiber-reinforced resin-based composite material sheet in Example 1 of the present invention.

[0020] Figure 2 Schematic diagram of stacking porous fiber-reinforced resin-based composite material sheets in Example 1 of the present invention.

[0021] Figure 3 Schematic diagram of the annular sheet to be cut after the porous fiber-reinforced resin-based composite material sheets are stacked in Example 1 of the present invention.

[0022] Figure 4 This is a schematic diagram of cutting an annular sheet using the processing method in Example 1 of the present invention.

[0023] Figure 5 Schematic diagram of the annular sheet in Example 1 of the present invention.

[0024] Figure 6 Schematic diagram of cutting a rectangular piece using the processing method in Example 2 of the present invention.

[0025] Figure 7 This is a schematic diagram of cutting sector-shaped slices using the processing method in Example 3 of the present invention.

[0026] Figure 8 Schematic diagram of cutting dovetail groove fan-shaped pieces using the processing method in Example 4 of the present invention.

[0027] Figure 9 Schematic diagram of cutting a sector piece for cutting an S-shaped splicing groove using the processing method in Example 5 of the present invention.

[0028] Figure 10 This is a schematic diagram of cutting special-shaped sheets using the processing method in Example 6 of the present invention.

[0029] Figure 11 Schematic diagram of cutting rectangular strips using the processing method in Example 7 of the present invention.

[0030] Figure 12 Schematic diagram of cutting trapezoidal strips using the processing method in Example 8 of the present invention.

[0031] Figure 13 This is a schematic diagram of cutting special-shaped strips using the processing method in Example 9 of the present invention.

[0032] Figure 14 The figures show the results of bench tests on porous fiber-reinforced resin-based composite materials obtained by different processing methods, where A shows the result of the knife die stamping method, and the arrow in the figure indicates the worn part; B shows the result of the method in Example 4.

[0033] Description of the accompanying drawings: 1-first starting point of the cutter; 2-first exit edge of the cutter; 3-second starting point of the cutter; 4-second exit edge of the cutter; 5-third starting point of the cutter; 6-second exit edge of the cutter; 7-clamp; 8-slit width; 9-slit gap; 10-cutting trajectory; the arrows in the figure indicate the cutting path of the diamond wire during the cutting process. DETAILED DESCRIPTION

[0034] In order to more clearly understand the above-mentioned objects, features and advantages of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that, in the absence of conflict, the embodiments of the present application and the features therein can be combined with each other.

[0035] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.

[0036] In the prior art, the cutting methods for wet paper-based friction materials mainly include die stamping or knife die stamping. However, both of the above methods are blanking. During the blanking process, the blanked edges will be physically squeezed, thereby causing edge damage. This damage will reduce the strength and structural integrity of the material, thereby shortening the fatigue life of the product.

[0037] Diamond wire cutting is a highly efficient and precise cutting technology that primarily utilizes diamond wire as a cutting tool. Through high-speed rotation or reciprocating motion, it creates a relative grinding motion with the object being cut, thereby achieving the purpose of cutting. Diamond wire cutting is primarily used for cutting and trimming brittle materials, such as brittle crystal materials, marble, and other stone materials. However, diamond wire cutting has not been applied to the cutting of non-brittle materials, such as paper-based materials. This is primarily due to the high porosity and soft texture of paper-based materials. While diamond wire has high hardness and sharpness, improper control during the cutting process can easily cause tearing or damage to the paper-based material, affecting cutting quality.

[0038] The present invention achieves cutting of paper substrates, i.e., porous fiber-reinforced resin-based composite materials, by selecting the cutting speed, feed speed, tension and diamond wire during the diamond cutting process and coordinating the various parameters, thereby avoiding the problem that mold punching or knife die punching can only perform single-piece punching processing, resulting in low production efficiency; mold punching or knife die punching can also form physical extrusion on the punching edge of the material, causing damage to the cutting edge, and such cutting edge damage can reduce the strength and structural integrity of the material, thereby shortening the fatigue life of the product.

[0039] In the present invention, by controlling the cutting speed within the range of 5m / s to 45m / s, the pulling out or delamination of fibers during the cutting process can be reduced, thereby reducing the generation of burrs. 2 / min~15mm 2 / min feed rate to avoid incomplete fiber training in the material due to excessively fast feed rate, resulting in burrs, and peeling of the resin matrix, which in turn causes the material to collapse due to impact. Since porous fiber-reinforced resin-based composite materials usually have uneven hardness, a moderate tension of 150N~200N can ensure that the diamond wire maintains a stable trajectory when cutting high-hardness fibers and low-hardness resins, avoiding deviation. The present invention achieves low-damage and high-efficiency cutting of porous fiber-reinforced resin-based composite materials through the mutual coordination of the above-mentioned various parameters, efficient cutting of coarse particles, dynamic speed adjustment and stable tension control.

[0040] The present invention ensures the effective cutting size requirements and implements appropriate compensation equipment according to the different diamond wire diameters. For example, if the diameter is φ0.20, 0.1mm should be compensated outward at the cutting corner.

[0041] Tool path process route selection: Coordinate positioning: Take the material contact point as the zero point, cut in stages according to the preset coordinates to avoid overcutting or undercutting.

[0042] Real-time adjustment: Sensors monitor wire saw tension, temperature, and cutting surface quality to ensure a smooth cut.

[0043] The following is a detailed description of a method for processing a porous fiber-reinforced resin-based composite material.

[0044] The diamond wire cutting machine in the following embodiment adopts a method in which the cutting wire is fixed and the worktable is movable, wherein the worktable can move in the x-axis, y-axis and z-axis directions; the displacement error along the x-axis and y-axis is no more than 0.05mm, and can be relaxed to 0.15mm under certain conditions.

[0045] The model of the diamond wire cutting equipment used in the following embodiments is JLSK-500.

[0046] Example 1: A method for processing a porous fiber-reinforced resin-based composite material, comprising the following steps.

[0047] S1. Take 100 pieces of porous fiber reinforced resin matrix composite materials with a size of 500mm×500mm×0.8mm and stack them up, ensuring that the edges are flush. Figure 1 and Figure 2 As shown, the workpiece to be processed is obtained by pressing and fixing it under a pressure of 12 kg.

[0048] S2. Arrange multiple rings closely on the plane of the workpiece according to the inner and outer diameters of the ring slices, and arrange the ring slices to be cut as follows: Figure 3 As shown, a hole is punched at the center of each circular ring piece of the stacked workpiece to be processed to form a diamond wire threading hole.

[0049] S3. Fix the workpiece with threading holes on the workbench of the cutting machine, pass the diamond wire through the threading holes, perform linear cutting, start the machine to cut out the first inner circle, process all inner circles and cut out outer circles, and obtain an annular piece such as Figure 5 The specific cutting route is as shown in Figure 4 The wire cutting process parameters are as follows: diamond wire diameter 0.25mm, diamond particle size 45μm, blade height 30% of the diamond particle size, cutting speed 10m / s, feed speed 15mm 2 / min, the tension force is 200N, the slit width during cutting is 0.15mm, and the tool clearance is 0.30mm.

[0050] Example 2 A method for processing a porous fiber-reinforced resin-based composite material comprises the following steps: S1. Take 100 pieces of porous fiber-reinforced resin-based composite materials with a size of 500 mm × 500 mm × 0.8 mm, stack them up, and ensure that the edges are flush; use a pressurizing method to press and fix them under a pressure of 10 kg to obtain a workpiece to be processed.

[0051] S2. Fix the workpiece to be processed on the workbench of the cutting machine and perform wire cutting. Continue cutting until all the workpieces are cut to obtain rectangular pieces. The specific cutting route is as follows: Figure 6 The wire cutting process parameters are as follows: diamond wire diameter 0.10mm, diamond particle size 30μm, blade height 30% of the diamond particle size, cutting speed 10m / s, feed speed 12mm 2 / min, the tension force is 200N, the slit width during cutting is 0.3mm, and the tool clearance is 0.5mm.

[0052] Example 3: A method for processing a porous fiber-reinforced resin-based composite material, comprising the following steps.

[0053] S1. Take 50 pieces of porous fiber-reinforced resin-based composite materials with a size of 500 mm × 500 mm × 0.8 mm, stack them up, and ensure that the edges are flush; use a pressurizing method to press and fix them under a pressure of 10 kg to obtain a workpiece to be processed.

[0054] S2. Fix the workpiece to be processed on the workbench of the cutting machine and perform wire cutting. Continue cutting until all the workpieces are cut to obtain fan-shaped pieces. The specific cutting route is as follows: Figure 7 The wire cutting process parameters are as follows: diamond wire diameter 0.18mm, diamond particle size 30μm, blade height 20% of the diamond particle size, cutting speed 12m / s, feed speed 15mm 2 / min, the tension force is 150N, the slit width during cutting is 0.25mm, and the tool clearance is 0.25mm.

[0055] Example 4: A method for processing a porous fiber-reinforced resin-based composite material, comprising the following steps.

[0056] S1. Take 200 pieces of porous fiber-reinforced resin-based composite materials with a size of 500 mm × 500 mm × 0.8 mm, stack them up, and ensure that the edges are flush; use a pressurizing method to press and fix them under a pressure of 12 kg to obtain a workpiece to be processed.

[0057] S2. Fix the workpiece to be processed on the workbench of the cutting machine and perform wire cutting. Continue cutting until all the workpieces are cut to obtain dovetail groove fan-shaped pieces. The specific cutting route is as follows: Figure 8 The wire cutting process parameters are as follows: diamond wire diameter 0.30mm, diamond particle size 45μm, blade height 30% of the diamond particle size, cutting speed 10m / s, feed speed 10mm 2 / min, the tension force is 200N, the kerf width during cutting is 0.35, and the tool clearance is 0.35mm.

[0058] Example 5: A method for processing a porous fiber-reinforced resin-based composite material, comprising the following steps.

[0059] S1. Take 500 pieces of porous fiber-reinforced resin-based composite materials with a size of 500 mm × 500 mm × 1.0 mm, stack them up, and ensure that the edges are flush; use a pressurizing method to press and fix them under a pressure of 15 kg to obtain a workpiece to be processed.

[0060] S2. Fix the workpiece to be processed on the workbench of the cutting machine and perform wire cutting. Continue cutting until all the workpieces are cut to obtain the fan-shaped pieces of the S-shaped splicing groove. The specific cutting route is as follows: Figure 9 The wire cutting process parameters are as follows: diamond wire diameter 0.35mm, diamond particle size 45μm, blade height 30% of the diamond particle size, tool speed 8m / s for curve cutting, tool speed 15m / s for straight line cutting, feed speed 10mm 2 / min, the tension force is 250N, the slit width during cutting is 0.4mm, and the tool clearance is 0.3mm.

[0061] Example 6: A method for processing a porous fiber-reinforced resin-based composite material, comprising the following steps.

[0062] S1. Take 1000 pieces of porous fiber-reinforced resin-based composite materials with a size of 500 mm × 500 mm × 0.4 mm, stack them up, and ensure that the edges are flush; use a pressurizing method to press and fix them under a pressure of 20 kg to obtain a workpiece to be processed.

[0063] S2. Fix the workpiece to be processed on the workbench of the cutting machine and perform wire cutting. Continue cutting until all the workpieces are cut to obtain special-shaped pieces. The specific cutting route is as follows: Figure 10 The wire cutting process parameters are as follows: diamond wire diameter 0.4mm, diamond particle size 45μm, blade height 30% of the diamond particle size, tool speed 5m / s for curve cutting, tool speed 14m / s for straight line cutting, feed speed 10mm 2 / min, the tension force is 250N, the slit width during cutting is 0.4mm, and the tool clearance is 0.4mm.

[0064] Example 7: A method for processing a porous fiber-reinforced resin-based composite material, comprising the following steps.

[0065] S1. Take 400 pieces of porous fiber-reinforced resin-based composite materials with a size of 500 mm × 500 mm × 2.0 mm, stack them up, and ensure that the edges are flush; use a pressurizing method to press and fix them under a pressure of 15 kg to obtain the workpiece to be processed.

[0066] S2. Fix the workpiece to be processed on the workbench of the cutting machine and perform wire cutting. Continue cutting until all the workpieces are cut to obtain rectangular strips. The specific cutting route is as follows: Figure 11 The wire cutting process parameters are as follows: diamond wire diameter 0.35mm, diamond particle size 45μm, blade height 30% of the diamond particle size, cutting speed 8m / s, feed speed 15mm 2 / min, the tension force is 250N, the slit width during cutting is 0.35mm, and the tool clearance is 0.35mm.

[0067] Example 8: A method for processing a porous fiber-reinforced resin-based composite material, comprising the following steps.

[0068] S1. Take 400 pieces of porous fiber-reinforced resin-based composite materials with a size of 500 mm × 500 mm × 0.8 mm, stack them up, and ensure that the edges are flush; use a pressurizing method to press and fix them under a pressure of 15 kg to obtain the workpiece to be processed.

[0069] S2. Fix the workpiece to be processed on the workbench of the cutting machine and perform wire cutting. Continue cutting until all the workpieces are cut to obtain trapezoidal strips. The specific cutting route is as follows: Figure 12 The wire cutting process parameters are as follows: diamond wire diameter 0.35mm, diamond particle size 45μm, blade height 30% of the diamond particle size, cutting speed 8m / s, feed speed 15mm 2 / min, the tension force is 250N, the slit width during cutting is 0.40mm, and the tool clearance is 0.40mm.

[0070] Example 9: A method for processing a porous fiber-reinforced resin-based composite material, comprising the following steps.

[0071] S1. Take 400 pieces of porous fiber-reinforced resin-based composite materials with a size of 500 mm × 500 mm × 0.8 mm, stack them up, and ensure that the edges are flush; use a pressurizing method to press and fix them under a pressure of 15 kg to obtain the workpiece to be processed.

[0072] S2. Fix the workpiece to be processed on the workbench of the cutting machine and perform wire cutting. Continue cutting until all the workpieces are cut to obtain special-shaped strips. The specific cutting route is as follows: Figure 13 The wire cutting process parameters are as follows: diamond wire diameter 0.35mm, diamond particle size 45μm, blade height 30% of the diamond particle size, cutting speed 8m / s, feed speed 15mm 2 / min, the tension force is 250N, the slit width during cutting is 0.40mm, and the tool clearance is 0.40mm.

[0073] Comparative Example 1: Except that the cutting speed is 3 m / s, which is different from Example 1, the other steps are the same as Example 1.

[0074] Comparative Example 2: Except that the tool speed is 50 m / s, which is different from Example 1, the remaining steps are the same as Example 1.

[0075] Comparative Example 3: Except the feed speed is 10mm 2 / min is different from Example 1, and the other steps are the same as those in Example 1.

[0076] Comparative Example 4: Except the feed speed is 20mm 2 / min is different from Example 1, and the other steps are the same as those in Example 1.

[0077] Comparative Example 5: Except that the tensioning force is 100N, which is different from Example 1, the remaining steps are the same as Example 1.

[0078] Comparative Example 6: Except that the tensioning force is 250N, which is different from Example 1, the other steps are the same as Example 1.

[0079] Comparative Example 7: Except that the diamond particle size is 100 μm, which is different from Example 1, the remaining steps are the same as Example 1.

[0080] Comparative Example 8: Except that the diamond particle size is 200 μm, which is different from Example 1, the remaining steps are the same as Example 1.

[0081] A total of 17 groups of porous fiber-reinforced resin-based composite materials prepared in Examples 1 to 9 and the porous fiber-reinforced resin-based composite materials obtained in Comparative Examples 1 to 8 were bench tested. Each bench test tested one sample, and a total of 100 samples were tested in each group. Finally, the average usage time and average breakage rate were calculated. The specific results are shown in Tables 1 and 2.

[0082] Table 1 Bench test results of Examples 1 to 9

[0083] Table 2 Bench test results of Comparative Examples 1 to 8

[0084] As can be seen from the results in Tables 1 and 2, the porous fiber-reinforced resin-based composite materials prepared using the methods of Examples 1 to 9 have an average service life of more than 200 hours, and no damage occurs within this service life. However, the porous fiber-reinforced resin-based composite materials prepared using the methods of Comparative Examples 1 to 8 have an average service life of less than 100 hours, with a minimum of only 15 hours, and a breakage rate of 20% to 40% within the service life. This shows that the method of the present invention is able to achieve cutting of porous fiber-reinforced resin-based composite materials made of brittle materials only under precise control of diamond wire cutting conditions. Improper control of any parameter will seriously affect the performance of the porous fiber-reinforced resin-based composite material. The present invention can achieve cutting of porous fiber-reinforced resin-based composite materials by precisely controlling the cutting speed, feed speed, tension and diamond particle size of diamond wire cutting, and coordinating various parameters with each other. The products cut under these conditions have smooth edges and no burrs, and multiple porous fiber-reinforced resin-based composite materials can be processed at one time, which not only increases the service life of the porous fiber-reinforced resin-based composite materials and reduces the breakage rate, but also improves the processing efficiency. It provides a new method for the processing of porous fiber-reinforced resin-based composite materials and effectively solves the problems of low efficiency of mold stamping method or knife die stamping method in the prior art, burrs after cutting, and short service life.

[0085] In order to further illustrate the effect of the processing method of the present invention, the porous fiber reinforced resin matrix composite material prepared by the method in Example 5 and the knife die stamping method was bonded to both sides of the annular steel core plate and a bench test was conducted. The specific results are shown in FIG. Figure 14 As shown. Figure 14 It can be seen that edge damage is clearly visible at the location indicated by the arrow, while the porous fiber-reinforced resin-based composite material prepared using the method of Example 5 has no edge damage. This shows that the processing method of the present invention can effectively avoid the problem of edge damage, thereby improving the performance and lifespan of the material.

[0086] Although the preferred embodiments of the present invention have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.

[0087] Obviously, those skilled in the art may make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if such changes and modifications fall within the scope of the claims and their equivalents, the present invention is intended to include such changes and modifications.

Claims

1. A method for processing a porous fiber-reinforced resin-based composite material, characterized in that: The following steps are involved: Stacking and fixing multiple sheets of porous fiber-reinforced resin-based composite materials to obtain a workpiece to be processed; The workpiece is cut with diamond wire, and the cutting speed of the diamond wire is controlled between 5m / s and 45m / s, and the feed speed is 12mm. 2 / min~15mm 2 / min, and the tension is 150N~200N. In the diamond wire, the particle size of diamond is 30 μm to 45 μm.

2. The method for processing a porous fiber-reinforced resin-based composite material according to claim 1, characterized in that: The diameter of the diamond wire is 0.10 mm to 0.50 mm.

3. The method for processing a porous fiber-reinforced resin-based composite material according to claim 1, characterized in that: The diamond wire is a resin-type diamond wire.

4. The method for processing a porous fiber-reinforced resin-based composite material according to claim 1, wherein: The cutting edge height of the diamond wire is 25% to 30% of the particle size of the diamond.

5. The method for processing a porous fiber-reinforced resin-based composite material according to claim 1, characterized in that: The cutting clearance of the diamond wire is 0.15mm~0.5mm.

6. The method for processing a porous fiber-reinforced resin-based composite material according to claim 1, characterized in that: The stacking quantity of the porous fiber-reinforced resin-based composite material is 50 to 500 sheets.

7. The method for processing a porous fiber-reinforced resin-based composite material according to claim 1, characterized in that: The thickness of the porous fiber-reinforced resin-based composite material is 0.4 mm to 2.5 mm.

8. The method for processing a porous fiber-reinforced resin-based composite material according to claim 1, wherein: The slit width during the cutting process is 0.15 mm to 0.50 mm.

9. The method for processing a porous fiber-reinforced resin-based composite material according to claim 1, wherein: The cutting mode of the diamond wire cutting is unidirectional or reciprocating.

Images