A method for processing a porous fiber reinforced resin matrix composite

Abstract

This invention relates to the field of composite material processing technology, specifically to a processing method for porous fiber-reinforced resin-based composite materials. The processing method includes the following steps: stacking multiple sheets of porous fiber-reinforced resin-based composite materials, ensuring the edges are flush, and pressing and fixing the edges to obtain the workpiece to be processed; performing diamond wire cutting on the workpiece, controlling the diamond wire feed rate at 5 m / s to 45 m / s and the feed rate at 12 mm. 2 / min~15mm 2 Cutting is performed under conditions of 150N~200N / min and tension; the diamond grain size in the diamond wire is 30μm~45μm. The method of this invention not only effectively solves the problem of edge damage during punching, but also enables the cutting of multiple samples at once, significantly improving work efficiency.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of composite material processing, in particular to a processing method of porous fiber reinforced resin matrix composite material. BACKGROUND

[0002] The wet type paper-based friction material belongs to the porous fiber reinforced resin matrix composite material, and the porosity is as high as 40% or more. The wet type paper-based friction material is usually made by using a papermaking process to make a preform, then sizing, and then heat curing to form a continuous plate with a thickness of 0.4mm-1.0mm. The wet type paper-based friction material product is usually a sandwich structure formed by bonding the wet type paper-based friction material on both sides of a ring-shaped steel core plate. Among them, the thickness of the steel core plate is 0.8mm-2.0mm, the thickness of the wet type paper-based friction material is 0.4mm-1.0mm, and the thickness of the whole product is 1.6-4.0mm. In the wet type paper-based friction material product, the wet type paper-based friction material bonded can be a whole ring or a ring spliced by multiple segments.

[0003] In the prior art, the cutting method of the wet type paper-based friction material mainly includes die stamping or knife die stamping. The single plate-shaped wet type paper-based friction material with a thickness of 0.4mm-1.0mm is usually placed on a punch press with a stamping die or a knife die to be cut, so as to obtain a ring-shaped friction material or a ring-shaped friction material that can be spliced by multiple segments. Since the die cutting or knife die cutting can only be used for single cutting processing, the production efficiency is low. Moreover, the die cutting or knife die cutting will cause physical extrusion at the cutting edge of the material, resulting in damage to the cutting edge. Such damage to the cutting edge will reduce the strength and structural integrity of the material, thereby shortening the fatigue life of the product. When the product is subjected to a bench test, it should be qualified for 200 hours, but the problem of dropping and small pieces may occur before 200 hours, thereby seriously affecting the use effect and service life. On the other hand, when the wet type paper-based friction material spliced by multiple segments is bonded on the ring-shaped steel core plate, the spliced edge will have an acute angle or a large angle change, and the mechanical damage of the cutting edge will be more serious, which will seriously affect the fatigue life of the product. A large-tonnage punch press is used in the processing process, and the energy consumption is high. SUMMARY

[0004] In order to solve the problem that the edge of the porous fiber reinforced resin matrix composite material is damaged during the die stamping or knife die stamping of the porous fiber reinforced resin matrix composite material in the prior art, thereby affecting the service life of the subsequent product, the present application provides a processing method of porous fiber reinforced resin matrix composite material.

[0005] In order to achieve the above-mentioned application purposes, the technical scheme of the present application is as follows.

[0006] A method for processing a porous fiber-reinforced resin-based composite material includes the following steps:

[0007] Multiple porous fiber-reinforced resin matrix composite materials are stacked and fixed to obtain the part to be processed;

[0008] The workpiece is cut using diamond wire cutting, with the diamond wire feed speed controlled at 5m / s~45m / s, the feed rate at 12mm / min~15mm / min, and the tension at 150N~200N.

[0009] The diamond wire has a diamond particle size of 30μm to 45μm.

[0010] The porous fiber-reinforced resin matrix composite material in this invention is a brittle material. By strictly controlling the process conditions of diamond wire feed speed (5m / s~15m / s), feed rate (12mm / min~15mm / min), and tension (150N~200N), the porous fiber-reinforced resin matrix composite material is cut with diamond wire of 30μm~45μm particle size. This not only effectively solves the problem of edge damage and burrs caused by stamping or die stamping methods in the prior art, thus affecting the material's performance, but also improves cutting accuracy and work efficiency. Diamond with a particle size of 30μm~45μm has higher cutting edge strength and chip space, making it suitable for rapid cutting. The continuous flexible cutting of the diamond wire reduces local stress concentration, thereby reducing damage caused by stress concentration. Cutting at speeds of 5 m / s to 45 m / s reduces the cutting force of individual diamond particles, minimizing the risk of thermal softening in porous fiber-reinforced resin composites and preventing scorching or blade sticking. Cutting with a tension of 150 N to 200 N ensures the diamond wire maintains a stable trajectory during cutting, preventing deviation and improving cutting accuracy. This invention, through precise parameter control, applies diamond wire cutting to the cutting of brittle materials, marking its first application in this field while producing burr-free edges. Furthermore, stacking multiple porous fiber-reinforced resin composites allows for simultaneous cutting of multiple composites, significantly improving work efficiency.

[0011] In another preferred embodiment, the diameter of the diamond wire is 0.1mm to 0.5mm. During the cutting process, if the diameter of the diamond wire is too large, it will cause significant damage to the material, resulting in edge breakage or cracks. If the diameter of the diamond wire is too small, the cutting efficiency will be reduced.

[0012] In another preferred embodiment, the diamond wire is a resin-based diamond wire.

[0013] In another preferred embodiment, the diamond wire has a cutting edge height of 25% to 30% of the particle size of the diamond. At this cutting edge height, the depth of the diamond particles cutting into the workpiece is deep, the single cutting amount is increased, and the cutting efficiency is high.

[0014] In another preferred embodiment, the diamond wire has a cutting gap of 0.15 mm to 0.5 mm.

[0015] In another preferred embodiment, the number of stacked porous fiber reinforced resin matrix composites is 10 to 500. Too few sheets result in low production efficiency, and too many sheets require diamond wires with higher tensile strength to increase their tensile force, resulting in a significant increase in cost. In addition, the placement space of the equipment also needs to be increased.

[0016] In another preferred embodiment, the thickness of the porous fiber reinforced resin matrix composite is 0.4 mm to 2.5 mm.

[0017] In another preferred embodiment, the kerf width during cutting is 0.15 mm to 0.50 mm.

[0018] In another preferred embodiment, the diamond wire cutting is of a unidirectional or reciprocating type.

[0019] Compared with the prior art, the present application has the following beneficial effects.

[0020] (1) The present application uses diamond wire to cut porous fiber reinforced resin matrix composites. By controlling the cutting speed of the diamond wire at a speed of 5 m / s to 45 m / s, the cutting force of individual diamond particles can be reduced, the risk of thermal softening of the porous fiber reinforced resin matrix and fiber pull-out or delamination can be reduced, and the 30 μm to 45 μm particle size diamond has higher cutting edge strength and chip space. Cutting at a feed rate of 12 mm / min to 15 mm / min can control the material removal rate, reduce burrs and edge collapse, and maintain the integrity of the cutting surface, thereby effectively ensuring the completeness of the cutting edge, avoiding damage and burr problems; and under a tension of 150 N to 200 N, the diamond wire can maintain stable trajectory during cutting, thereby effectively improving the accuracy of cutting, allowing multiple porous fiber reinforced resin matrix composites to be cut at one time, and the cutting edge after cutting will not be damaged, effectively solving the problem of damage to the edge caused by physical extrusion during mold stamping or die stamping, thereby affecting the service life.

[0021] (2) The method of the present application can simultaneously cut 50 to 200 porous fiber reinforced resin matrix composites at one time, and the cutting edge after cutting has no burr and damage, effectively improving the use effect of the material. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the porous fiber-reinforced resin-based composite sheet in Embodiment 1 of the present invention.

[0023] Figure 2 This is a schematic diagram of the stacked porous fiber-reinforced resin matrix composite material sheets in Embodiment 1 of the present invention.

[0024] Figure 3 This is a schematic diagram of the annular sheet to be cut after the porous fiber-reinforced resin matrix composite material sheets are stacked in Embodiment 1 of the present invention.

[0025] Figure 4 This is a schematic diagram of cutting an annular piece using the processing method in Embodiment 1 of the present invention.

[0026] Figure 5 This is a schematic diagram of the annular sheet in Embodiment 1 of the present invention.

[0027] Figure 6 This is a schematic diagram of cutting a rectangular piece using the processing method in Embodiment 2 of the present invention.

[0028] Figure 7 This is a schematic diagram of cutting a sector-shaped piece using the processing method described in Embodiment 3 of the present invention.

[0029] Figure 8 This is a schematic diagram of cutting a dovetail groove fan-shaped piece using the processing method in Embodiment 4 of the present invention.

[0030] Figure 9 This is a schematic diagram of cutting a fan-shaped piece for cutting an S-shaped splicing groove using the processing method in Embodiment 5 of the present invention.

[0031] Figure 10 This is a schematic diagram of cutting irregularly shaped pieces using the processing method in Embodiment 6 of the present invention.

[0032] Figure 11 This is a schematic diagram of cutting a rectangular strip using the processing method in Embodiment 7 of the present invention.

[0033] Figure 12 This is a schematic diagram of cutting trapezoidal strips using the processing method in Embodiment 8 of the present invention.

[0034] Figure 13 This is a schematic diagram of cutting irregular strips using the processing method in Embodiment 9 of the present invention.

[0035] Figure 14Figures showing the results of bench tests of porous fiber reinforced resin matrix composite materials obtained by different processing methods, in which A is a figure showing the results obtained by using a die punching method, and the arrowed portion is the worn part; and B is a figure showing the results obtained by using the method of Example 4.

[0036] BRIEF DESCRIPTION OF DRAWINGS: 1 - first starting point; 2 - first exit point; 3 - second starting point; 4 - second exit point; 5 - third starting point; 6 - second exit point; 7 - clamp; 8 - slit width; 9 - slit gap; 10 - tool path; and the arrow in the figure indicates the cutting path of the diamond wire during cutting. DETAILED DESCRIPTION

[0037] In order to enable a more complete understanding of the above-mentioned objects, features and advantages of the present application, the present application will be described in further detail below with reference to the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict, if necessary.

[0038] In the following description, a large number of specific details are set forth in order to facilitate a thorough understanding of the present application, however, the present application can also be implemented in other ways different from those described herein, and therefore, the scope of protection of the present application is not limited by the specific embodiments disclosed below.

[0039] In the prior art, the cutting methods for wet paper-based friction materials mainly include die punching or knife die punching, however, both of the above-mentioned methods are punching, and in the punching process, the edges of the punched material will be physically extruded, thereby causing damage to the edges, which will reduce the strength of the material and the integrity of the structure, and thereby shorten the fatigue life of the product.

[0040] Diamond wire cutting is a high-efficiency and precise cutting technology, mainly using diamond wire as a cutting tool, and through high-speed rotation or reciprocating motion, forming relative grinding motion with the cut object, thereby achieving the purpose of cutting. Diamond wire cutting is mainly applied to cutting and trimming of brittle materials, such as brittle crystal materials, marble and other stone materials. However, diamond wire cutting has not been applied to cutting of non-brittle materials, such as cutting of paper-based materials. This is mainly because paper-based materials have high porosity and soft material, although the hardness and sharpness of diamond wire are high, but if not properly controlled during cutting, it is easy to cause tearing or damage to the paper-based material, affecting the cutting quality.

[0041] The present application realizes the cutting of paper base material, i.e. porous fiber reinforced resin matrix composite material, by the cooperation of the above parameters, so as to avoid the single punching processing of the die blanking or the die cutting, and the low production efficiency; and the die blanking or the die cutting can form physical extrusion at the cutting edge of the material, causing the damage of the cutting edge, which can reduce the strength and the structural integrity of the material, and further shorten the fatigue life of the product.

[0042] In the present application, the fiber pull-out or delamination in the cutting process can be reduced by controlling the feed speed at 5m / s~45m / s, and the generation of burrs can be reduced, and the fiber in the material can be prevented from being incomplete by controlling the feed speed at 12mm / min~15mm / min, so as to avoid the burr and the peeling of the resin matrix, and the edge collapse of the material caused by impact. Since the porous fiber reinforced resin matrix composite material usually has uneven hardness, the tension of 150N~200N can ensure the stability of the trajectory of the diamond wire when cutting the high-hardness fiber and the low-hardness resin, and avoid the deviation. The present application realizes the low-damage and high-efficiency cutting of the porous fiber reinforced resin matrix composite material by the cooperation of the above parameters, the rough particle high-efficiency cutting, the dynamic speed adjustment and the stable tension control.

[0043] In the present application, the compensation amount equipment is appropriately compensated according to the different diameters of the diamond wire, for example, φ0.20, and the compensation amount is 0.1mm outward at the cutting corner.

[0044] The feed process route selection is as follows: coordinate positioning: taking the material contact point as the zero point, cutting in stages according to the preset coordinates, and avoiding overcutting or undercutting.

[0045] Real-time adjustment: the wire saw tension, temperature and cutting surface quality are monitored by the sensor to ensure the flatness of the cutting surface.

[0046] The following will specifically describe a processing method of a porous fiber reinforced resin matrix composite material.

[0047] The diamond wire cutting machine in the following examples adopts the cutting wire fixed and the workbench moving mode, wherein the workbench can move in the x-axis, y-axis and z-axis directions; the displacement error of the x-axis and y-axis movement is not more than 0.05mm, and under certain conditions, it can be relaxed to 0.15mm.

[0048] The diamond wire cutting equipment adopted in the following examples is JLSK-500.

[0049] Example 1: a processing method of a porous fiber reinforced resin matrix composite material, comprising the following steps.

[0050] S1, take 100 pieces of porous fiber reinforced resin matrix composite materials with the size of 500mmx500mmx0.8mm, stack them up and make sure the edges are flush, as shown in Figure 1 and Figure 2 , press them tightly and fix them with 12kg pressure to get the workpiece to be processed.

[0051] S2, arrange multiple rings on the plane of the workpiece to be processed according to the inner and outer diameters of the annular pieces, arrange the to-be-cut annular pieces as shown in Figure 3 , and punch holes at the center of each annular piece of the stacked workpiece to be processed to process diamond wire threading holes.

[0052] S3, fix the workpiece with threaded holes on the workbench of the cutting machine, thread the diamond wire through the threaded holes, and perform linear cutting to cut the first inner circle, process all the inner circles, and cut the outer circle to get the annular pieces as shown in Figure 5 , and the specific cutting route is shown in Figure 4 . The wire cutting process parameters are: diamond wire diameter 0.25mm, diamond particle size 45μm, blade height 30% of the particle size, feed speed 10m / s, feed speed 15mm / min, tension 200N, kerf width during cutting 0.15mm, and feed gap 0.30mm. Embodiment

[0053] A processing method of porous fiber reinforced resin matrix composite material, comprising the following steps:

[0054] S1, take 100 pieces of porous fiber reinforced resin matrix composite materials with the size of 500mmx500mmx0.8mm, stack them up and make sure the edges are flush; press them tightly and fix them with 10kg pressure to get the workpiece to be processed.

[0055] S2, fix the workpiece to be processed on the workbench of the cutting machine, perform wire cutting, and continuously feed until all workpieces are cut to get rectangular pieces, and the specific cutting route is shown in Figure 6 . The wire cutting process parameters are: diamond wire diameter 0.10mm, diamond particle size 30μm, blade height 30% of the particle size, feed speed 10m / s, feed speed 12mm / min, tension 200N, kerf width during cutting 0.3mm, and feed gap 0.5mm.

[0056] Embodiment 3: A processing method of porous fiber reinforced resin matrix composite material, comprising the following steps.

[0057] S1, take 50 pieces of porous fiber reinforced resin matrix composite material with the size of 500mm*500mm*0.8mm, stack them up and make sure the edges are flush; use the pressurized method to fix them tightly under the pressure of 10kg, and get the workpiece to be processed.

[0058] S2, fix the workpiece to be processed on the workbench of the cutting machine, perform wire cutting and continuously walk until all workpieces are cut, get the fan-shaped piece, and the specific cutting route is shown in Figure 7 . The wire cutting process parameters are: diamond wire diameter 0.18mm, diamond particle size 30μm, blade height 20% of the particle size of diamond, walking speed 12m / s, feeding speed 15mm / min, tension 150N, kerf width during cutting 0.25mm, walking gap 0.25mm.

[0059] Example 4: A processing method of porous fiber reinforced resin matrix composite material, comprising the following steps.

[0060] S1, take 200 pieces of porous fiber reinforced resin matrix composite material with the size of 500mm*500mm*0.8mm, stack them up and make sure the edges are flush; use the pressurized method to fix them tightly under the pressure of 12kg, and get the workpiece to be processed.

[0061] S2, fix the workpiece to be processed on the workbench of the cutting machine, perform wire cutting and continuously walk until all workpieces are cut, get the dovetail groove fan-shaped piece, and the specific cutting route is shown in Figure 8 . The wire cutting process parameters are: diamond wire diameter 0.30mm, diamond particle size 45μm, blade height 30% of the particle size of diamond, walking speed 10m / s, feeding speed 10mm / min, tension 200N, kerf width during cutting 0.35, walking gap 0.35mm.

[0062] Example 5: A processing method of porous fiber reinforced resin matrix composite material, comprising the following steps.

[0063] S1, take 500 pieces of porous fiber reinforced resin matrix composite material with the size of 500mm*500mm*1.0mm, stack them up and make sure the edges are flush; use the pressurized method to fix them tightly under the pressure of 15kg, and get the workpiece to be processed.

[0064] S2, fix the workpiece to be processed on the workbench of the cutting machine, perform wire cutting and continuously walk until all workpieces are cut, get the fan-shaped piece of S-shaped splicing groove, and the specific cutting route is shown in Figure 9The wire cutting process parameters are as follows: the diamond wire diameter is 0.35 mm, the diamond particle size is 45 μm, the blade height is 30% of the particle size of the diamond, the curve cutting is performed at a walking speed of 8 m / s, the linear cutting is performed at a walking speed of 15 m / s, the feeding speed is 10 mm / min, the tension is 250 N, the kerf width in the cutting process is 0.4 mm, and the walking gap is 0.3 mm.

[0065] Example 6: A processing method of a porous fiber reinforced resin matrix composite material, comprising the following steps.

[0066] S1, 1000 pieces of porous fiber reinforced resin matrix composite materials with a size of 500 mm x 500 mm x 0.4 mm are stacked, and the edges are ensured to be flush; a pressing mode is used to press and fix under a pressure of 20 kg, to obtain a workpiece to be processed.

[0067] S2, the workpiece to be processed is fixed on the workbench of the cutting machine, wire cutting is performed, and continuous walking is performed until all workpieces are cut, to obtain a special-shaped piece, and the specific cutting route is as shown in Figure 10 The wire cutting process parameters are as follows: the diamond wire diameter is 0.4 mm, the diamond particle size is 45 μm, the blade height is 30% of the particle size of the diamond, the curve cutting is performed at a walking speed of 5 m / s, the linear cutting is performed at a walking speed of 14 m / s, the feeding speed is 10 mm / min, the tension is 250 N, the kerf width in the cutting process is 0.4 mm, and the walking gap is 0.4 mm.

[0068] Example 7: A processing method of a porous fiber reinforced resin matrix composite material, comprising the following steps.

[0069] S1, 400 pieces of porous fiber reinforced resin matrix composite materials with a size of 500 mm x 500 mm x 2.0 mm are stacked, and the edges are ensured to be flush; a pressing mode is used to press and fix under a pressure of 15 kg, to obtain a workpiece to be processed.

[0070] S2, the workpiece to be processed is fixed on the workbench of the cutting machine, wire cutting is performed, and continuous walking is performed until all workpieces are cut, to obtain a rectangular strip, and the specific cutting route is as shown in Figure 11 The wire cutting process parameters are as follows: the diamond wire diameter is 0.35 mm, the diamond particle size is 45 μm, the blade height is 30% of the particle size of the diamond, the walking speed is 8 m / s, the feeding speed is 15 mm / min, the tension is 250 N, the kerf width in the cutting process is 0.35 mm, and the walking gap is 0.35 mm.

[0071] Example 8: A processing method of a porous fiber reinforced resin matrix composite material, comprising the following steps.

[0072] S1, 400 pieces of porous fiber reinforced resin matrix composite materials with a size of 500mmx500mmx0.8mm are stacked up and the edges are ensured to be flush; a pressing method is adopted to press and fix under a pressure of 15kg, to obtain the workpiece to be processed.

[0073] S2, the workpiece to be processed is fixed on the workbench of the cutting machine, and line cutting is performed, and continuous tool walking is performed until all workpieces are cut, to obtain trapezoidal strips, and the specific cutting route is as shown in Figure 12 The line cutting process parameters are: diamond wire diameter 0.35mm, diamond particle size 45μm, blade height 30% of the particle size of diamond, tool walking speed 8m / s, feed speed 15mm / min, tension force 250N, kerf width during cutting 0.40mm, tool walking gap 0.40mm.

[0074] Example 9: A processing method of porous fiber reinforced resin matrix composite material, comprising the following steps.

[0075] S1, 400 pieces of porous fiber reinforced resin matrix composite materials with a size of 500mmx500mmx0.8mm are stacked up and the edges are ensured to be flush; a pressing method is adopted to press and fix under a pressure of 15kg, to obtain the workpiece to be processed.

[0076] S2, the workpiece to be processed is fixed on the workbench of the cutting machine, and line cutting is performed, and continuous tool walking is performed until all workpieces are cut, to obtain special-shaped strips, and the specific cutting route is as shown in Figure 13 The line cutting process parameters are: diamond wire diameter 0.35mm, diamond particle size 45μm, blade height 30% of the particle size of diamond, tool walking speed 8m / s, feed speed 15mm / min, tension force 250N, kerf width during cutting 0.40mm, tool walking gap 0.40mm.

[0077] Comparative Example 1: Except that the tool walking speed is 3m / s, which is different from Example 1, the remaining steps are the same as those of Example 1.

[0078] Comparative Example 2: Except that the tool walking speed is 50m / s, which is different from Example 1, the remaining steps are the same as those of Example 1.

[0079] Comparative Example 3: Except that the feed speed is 10mm / min, which is different from Example 1, the remaining steps are the same as those of Example 1.

[0080] Comparative Example 4: Except that the feed speed is 20mm / min, which is different from Example 1, the remaining steps are the same as those of Example 1.

[0081] Comparative Example 5: The steps other than the tension of 100 N, which is different from Example 1, are the same as those of Example 1.

[0082] Comparative Example 6: The steps other than the tension of 250 N, which is different from Example 1, are the same as those of Example 1.

[0083] Comparative Example 7: The steps other than the diamond particle size of 100 μm, which is different from Example 1, are the same as those of Example 1.

[0084] Comparative Example 8: The steps other than the diamond particle size of 200 μm, which is different from Example 1, are the same as those of Example 1.

[0085] The porous fiber reinforced resin-based composite materials prepared in Examples 1 to 9 above and the porous fiber reinforced resin-based composite materials obtained in Comparative Examples 1 to 8, in total 17 groups, were respectively subjected to a bench test, one sample was tested each time, and one hundred sheets were tested in total for each group, and finally the average service time and the average breakage rate were calculated, and the specific results are shown in Tables 1 and 2.

[0086] Table 1: Results of the bench test of Examples 1 to 9

[0087] Group Average use time (h) Average breakage rate (%) Example 1 210 0 Example 2 205 0 Example 3 215 0 Example 4 230 0 Example 5 208 0 Example 6 203 0 Example 7 215 0 Example 8 208 0 Example 9 217 0

[0088] Table 2: Results of the bench test of Comparative Examples 1 to 8

[0089] Group Average use time (h) Average breakage rate (%) Comparative Example 1 80 30 Comparative Example 2 65 35 Comparative Example 3 50 40 Comparative Example 4 30 37 Comparative Example 5 20 40 Comparative Example 6 45 30 Comparative Example 7 35 20 Comparative Example 8 15 30

[0090] As can be seen from the results in Table 1 and Table 2, the average service life of the porous fiber reinforced resin matrix composite prepared by the method in Examples 1-9 is more than 200 hours, and there is no damage phenomenon within the service time range, while the average service life of the porous fiber reinforced resin matrix composite prepared by the method in Comparative Examples 1-8 cannot exceed 100 hours, the minimum is only 15 hours, and the damage rate is 20%-40% within the service time range. It can be seen that the method in the present application can realize the cutting of the brittle material porous fiber reinforced resin matrix composite by precisely controlling the conditions of diamond wire cutting. Any improper parameter control will seriously affect the performance of the porous fiber reinforced resin matrix composite. The present application can realize the cutting of the porous fiber reinforced resin matrix composite by precisely controlling the conditions of diamond wire cutting, such as the walking speed, the feeding speed, the tension and the diamond particle size, and the mutual cooperation between the parameters. The product cut under the conditions has smooth edges without burrs, and can process multiple porous fiber reinforced resin matrix composites at one time, which not only improves the service time of the porous fiber reinforced resin matrix composite and reduces the damage rate, but also improves the processing efficiency, provides a new method for processing the porous fiber reinforced resin matrix composite, and effectively solves the problems of low efficiency and burrs after cutting and short service time of the mold stamping method or the knife die stamping method in the prior art.

[0091] In order to further illustrate the effect of the processing method in the present application, the porous fiber reinforced resin matrix composite prepared by the method in Example 5 and the knife die stamping method is bonded on both sides of a ring-shaped steel core plate, and a parallel bench test is carried out, and the specific results are shown in Figure 14 As can be seen from Figure 14 It can be seen that the edge damage at the position indicated by the arrow can be obviously seen, while the porous fiber reinforced resin matrix composite prepared by the method in Example 5 has no any damage on the edge. It can be seen that the processing method in the present application can effectively avoid the problem of edge damage, thereby improving the service effect and life of the material.

[0092] Although the preferred embodiments of the present application have been described, those skilled in the art can make further changes and modifications to the embodiments once they know the basic creative concept. Therefore, the appended claims are intended to be interpreted as including all changes and modifications falling within the scope of the present application.

[0093] Obviously, those skilled in the art can make various modifications and variations to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

1. A method for processing a porous fiber-reinforced resin matrix composite material, characterized by, The method comprises the following steps: stacking and fixing a plurality of porous fiber reinforced resin matrix composites to obtain a workpiece to be processed; diamond wire cutting is performed on the workpiece to be processed, and the specific parameters are as follows: when the feed speed is 12 mm / min at a walking speed of 10 m / s, when the feed speed is 15 mm / min at a walking speed of 8 m / s, and the tension force is 150N-200N; when the walking speed is 8 m / s, the curve cutting is performed, when the walking speed is 15 m / s, the linear cutting is performed, and the feed speed is 10 mm / min; the tension force is 150N-200N; the particle size of the diamond in the diamond wire is 30μm-45μm; the diameter of the diamond wire is 0.10mm-0.50mm; the diamond wire is a resin type diamond wire; the porous fiber reinforced resin matrix composite is a soft wet paper-based friction material with a porosity of more than 40%.

2. The method of processing a porous fiber reinforced resin matrix composite material according to claim 1, wherein the particle size of the diamond in the diamond wire is 25%-30% of the particle size of the diamond.

3. The method of claim 1, wherein the porous fiber-reinforced resin matrix composite is a prepreg. 2 the walking gap of the diamond wire is 0.15mm-0.5mm.

4. The method of claim 1, wherein the porous fiber-reinforced resin matrix composite is a prepreg. the number of stacked porous fiber reinforced resin matrix composites is 50-500.

5. The method of processing a porous fiber reinforced resin matrix composite material according to claim 1, wherein the thickness of the porous fiber reinforced resin matrix composite is 0.4mm-2.5mm.

6. The method of processing a porous fiber reinforced resin matrix composite material according to claim 1, wherein the kerf width during cutting is 0.15mm-0.50mm.

7. The method of claim 1, wherein the porous fiber-reinforced resin matrix composite is a prepreg. the walking mode of the diamond wire cutting is unidirectional or reciprocating.

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