Grinding wheel cutting piece for cutting automobile cable and brake line and preparation method thereof

Abstract

The application discloses a grinding wheel cutting piece for cutting automobile cable and brake cable and a preparation method thereof, and belongs to the technical field of metal cutting, which comprises the following components in percentage by mass: 28-35% white corundum, 12-16% single crystal corundum, 3-6% zirconium corundum, 3-5% magnesium fluoride, 3-4% garnet, 7-10% cryolite, 15-18% liquid phenolic resin, 10-15% powdered phenolic resin and 1.2-2% diiron trioxide. The grinding wheel cutting piece with excellent performance is obtained by combining the raw materials. The grinding wheel cutting piece has high cutting sharpness, good cutting resistance and good wear resistance, cannot cause cable and brake cable port cutting skew, has low cutting point temperature, very small spark, good port heat dissipation effect, flat and bright port, no blackening, no deformation, no burning and can effectively improve the cutting yield and prevent the grinding wheel cutting piece from breaking out when cutting the cable and brake cable.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of metal cutting, in particular to a grinding wheel cutting piece for cutting automobile cables and brake lines and a preparation method thereof. BACKGROUND

[0002] At present, the grinding wheel cutting pieces for cutting automobile cables and brake lines on the market are either traditional ordinary grinding wheel cutting pieces or imported grinding wheel cutting pieces of Japanese DISCO brand; the traditional ordinary grinding wheel cutting pieces, due to backward production process, can only be used to make grinding wheel cutting pieces with a thickness of 1.2 mm (0.5-1.0 mm can be specified and customized abroad, and the cutting pieces capable of cutting automobile cables and brake lines well are 0.8 mm and 1.0 mm), and a "glass fiber net" needs to be added in the middle to enhance the rigidity, in the dry cutting process, the dust generated by the "glass fiber net" is inhaled into the lungs, which is extremely harmful to the human body and even causes lung disease and cancer; the Japanese DISCO brand grinding wheel cutting piece has monopolized the global market for decades in the field of high-end automobiles, and is sharp but not durable, and the price is expensive, so domestic and foreign customers have been looking for similar substitute products with excellent quality and high cost performance.

[0003] The traditional ordinary grinding wheel cutting piece is difficult to be flat, many of which are deformed and warped, and the main abrasive grain size of the formula is #54, so that the cut automobile cables and brake line ports are not flat, the port surface roughness is greater than 0.08 mm, and the cutting is not durable, which results in a small number of cutting, and the cutting also needs secondary manual and equipment grinding, which increases many labor costs, equipment costs, site costs, water and electricity costs, environmental protection costs and other problems, and can only be used for low-end automobiles and motorcycle brands, or used in repair shops, and high-end automobile brands are still not dared to use, and the traditional ordinary grinding wheel cutting piece, due to its backward formula, the thickness precision error of the product made is about 0.3 mm, and the flatness is more than 0.2 mm, the size error range of the batch product after cutting is large, and the product quality consistency is poor, for example, the length error of the Japanese DISCO cutting piece can be controlled within 0.5 mm, and the length of the domestic grinding wheel piece can be controlled within 1 mm, and the length quality tolerance difference is 1 times.

[0004] CN112338819A discloses a resin grinding wheel cutting piece, which comprises an abrasive layer and two glass fiber mesh layers, and the abrasive layer comprises the following components in mass fraction: modified white corundum: 50-68%, white corundum: 0-15%, powdered phenolic resin: 6.5-11%, liquid phenolic resin: 3-6%, calcium sulfate whisker: 5-8%, cryolite: 5-8%, and hemihydrate gypsum powder: 3-8%. The glass fiber mesh produces dust inhaled into the lungs, which is extremely harmful to the human body and even causes lung disease and cancer. In addition, aluminum sulfate will decompose to produce sulfur trioxide at high temperature, which is irritating and pollutes the environment. Moreover, the aluminum oxide on the surface of the modified white corundum affects the performance of the white corundum, such as the decrease of white corundum crystalline hardness, the decrease of cutting ability, easy pulverization and fracture, and low thermal stability. SUMMARY

[0005] The present application aims to overcome the deficiencies in the prior art and provide a grinding wheel cutting piece for cutting automobile cables and brake lines and a preparation method thereof, which has high cutting sharpness, good cutting resistance and good wear resistance.

[0006] To achieve the above-mentioned purpose, in the first aspect of the present application, the present application provides a grinding wheel cutting piece for cutting automobile cables and brake lines, which comprises the following components in mass percentage: 28-35% white corundum, 12-16% single crystal corundum, 3-6% zirconium corundum, 3-5% magnesium fluoride, 3-4% garnet, 7-10% cryolite, 15-18% liquid phenolic resin, 10-15% powdered phenolic resin, and 1.2-2% ferric sesquioxide.

[0007] As a preferred embodiment of the present application, it comprises the following components in mass percentage: 28-32% white corundum, 14-16% single crystal corundum, 4-6% zirconium corundum, 4-5% magnesium fluoride, 3.5-4% garnet, 8-10% cryolite, 16-18% liquid phenolic resin, 12-15% powdered phenolic resin, and 1.5-2% ferric sesquioxide.

[0008] As a preferred embodiment of the present application, it comprises the following components in mass percentage: 30.5% white corundum, 15.5% single crystal corundum, 5% zirconium corundum, 4.8% magnesium fluoride, 3.8% garnet, 8.5% cryolite, 16.1% liquid phenolic resin, 14% powdered phenolic resin, and 1.8% ferric sesquioxide.

[0009] As a preferred embodiment of the present application, the white corundum comprises 60-mesh white corundum, 80-mesh white corundum, and 100-mesh white corundum.

[0010] The mass ratio of the 60-mesh white corundum, the 80-mesh white corundum and the 100-mesh white corundum is (40-50):(8-10):(8-10).

[0011] As a preferred embodiment of the present application, the mass ratio of the 60-mesh white corundum, the 80-mesh white corundum and the 100-mesh white corundum is 43:9:9.

[0012] As a preferred embodiment of the present application, the particle size of the single-crystal corundum is 40-100 mesh; and / or

[0013] The particle size of the zirconium corundum is 40-100 mesh.

[0014] As a preferred embodiment of the present application, the particle size of the magnesium fluoride is 100-300 mesh.

[0015] As a preferred embodiment of the present application, the particle size of the garnet is 200-300 mesh; and / or

[0016] The particle size of the cryolite is 300-400 mesh.

[0017] As a preferred embodiment of the present application, the liquid phenolic resin comprises at least one of phenolic resin PR-23, phenolic resin PR-940, phenolic resin PR-55729, phenolic resin PR-50232, phenolic resin PR-14170; and / or

[0018] The powder phenolic resin comprises at least one of phenolic resin PR-50099, phenolic resin PR-51794, phenolic resin PR-13355, phenolic resin PR-12987, phenolic resin PR-12687, phenolic resin PR-PR-7031A.

[0019] In the second aspect of the present application, the present application provides a preparation method of a grinding wheel cutting piece for cutting automobile cables and brake lines, comprising the following steps:

[0020] (1) mixing each raw material uniformly and pressing into a blank;

[0021] (2) first firing the blank at 40-55℃ for 1-4h, then firing at 65-75℃ for 2-5h, then firing at 95-105℃ for 3-5h, then firing at 115-125℃ for 3-5h, then firing at 150-170℃ for 2-5h, and finally firing at 180-200℃ for 3-5h, to obtain the grinding wheel cutting piece for cutting automobile cables and brake lines.

[0022] The application has the advantages that: (1) the application combines raw materials to obtain a grinding wheel cutting piece with excellent performance, the grinding wheel cutting piece has high cutting sharpness, good cutting resistance and good wear resistance, does not cause cable and brake line port cutting skew, the cutting point has low temperature, spark is extremely small, and the port has good heat dissipation effect, the port is flat, bright, not black, not deformed, not burned, can effectively improve the cutting yield, and prevent the grinding wheel cutting piece from breaking out when cutting the cable and brake line; (2) the grinding wheel cutting piece does not need to use a glass fiber reinforced net, and does not produce glass fiber dust when cutting, which is good for human health; (3) in the application, the addition of white corundum, single crystal corundum, zirconium corundum and garnet can effectively improve the sharpness of the cutting piece, which is beneficial to cutting the cable and brake line more quickly, effectively improves the working efficiency, and the single crystal corundum and zirconium corundum can also play a role in cooling and improving heat resistance to a certain extent, the use of three different corundums can make them better combined with phenolic resin, improve the combination degree, and then improve the comprehensive performance. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme in the embodiments of the present application will be described clearly and completely below. Obviously, the described embodiments are some embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the present application.

[0024] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme in the embodiments of the present application will be described clearly and completely below. Obviously, the described embodiments are some embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the present application.

[0025] In the present application, the technical features described in an open form include a closed technical scheme composed of listed features, and also include an open technical scheme containing listed features.

[0026] In the present application, when a numerical interval is involved, the numerical interval is regarded as continuous and includes the minimum value and the maximum value of the range and each value between the minimum value and the maximum value, unless otherwise specified. Further, when multiple ranges are provided to describe a feature or a characteristic, the ranges can be combined. In other words, unless otherwise specified, all ranges disclosed herein should be understood to include any and all subranges therein.

[0027] In the present application, the specific dispersion, stirring treatment method is not particularly limited.

[0028] In the present application, the said part is mass part unless otherwise stated.

[0029] The reagents or instruments used in the present application are not specified by the manufacturer, and are all conventional products that can be purchased on the market. The raw material information used in the examples and comparative examples of the present application is as follows:

[0030] 60-mesh white corundum (F60) was purchased from Shandong Yingge Ceramics Four Sand Taishan Abrasive Co., Ltd.

[0031] 80-mesh white corundum (F80) was purchased from Shandong Yingge Ceramics Four Sand Taishan Abrasive Co., Ltd.

[0032] 100-mesh white corundum (F100) was purchased from Shandong Yingge Ceramics Four Sand Taishan Abrasive Co., Ltd.

[0033] 60-mesh single crystal corundum was purchased from Saint-Gobain Abrasives & Abratives Shanghai Co., Ltd.

[0034] 60-mesh zirconium corundum was purchased from Saint-Gobain Abrasives & Abratives Shanghai Co., Ltd.

[0035] 200-mesh magnesium fluoride was purchased from Qinhuangdao Benxing Crystal Technology Co., Ltd.

[0036] 240-mesh garnet was purchased from Jinhong Micro-powder Abrasive Co., Ltd.

[0037] 320-mesh cryolite was purchased from Zhengzhou Tianzhi Rui New Material Co., Ltd.

[0038] Phenolic resin PR-55729, phenolic resin PR-940, phenolic resin PR-50099, and phenolic resin PR-51794 were purchased from Sumitomo Bakelite Co., Ltd.

[0039] 320-mesh ferric sesquioxide was purchased from Gongyi Fuguan Refractory Co., Ltd.

[0040] The sand wheel cutting piece for cutting automobile cables and brake lines provided by the examples of the present application comprises the following components in mass percentage: 28-35% white corundum, 12-16% single crystal corundum, 3-6% zirconium corundum, 3-5% magnesium fluoride, 3-4% garnet, 7-10% cryolite, 15-18% liquid phenolic resin, 10-15% powdered phenolic resin, and 1.2-2% ferric sesquioxide.

[0041] The sand wheel cutting piece has high cutting sharpness, good cutting resistance and good wear resistance, does not cause cable and brake line port cutting skew, has low cutting point temperature, extremely small spark, and good port heat dissipation effect, and the port is flat, bright, not black, not deformed, not burned, can effectively improve the cutting yield, and prevent the sand wheel cutting piece from breaking out when cutting the cable and brake line.

[0042] The sand wheel cutting piece does not need to use glass fiber reinforced net, and does not produce glass fiber dust during cutting, and is healthy to human body.

[0043] In the present application, the addition of white corundum, single crystal corundum, zirconium corundum and garnet can effectively improve the sharpness of the cutting piece, which is beneficial to cutting the cable and brake line more quickly and effectively improving the work efficiency.

[0044] In the present application, single crystal corundum and zirconium corundum can also play a role in cooling and improving heat resistance to a certain extent. By using three different corundums, they can be better combined with phenolic resin, improve the bonding degree, and thus improve the comprehensive performance.

[0045] In the present application, the addition of cryolite can play a role in cooling during cutting, reducing sparks during cutting, reducing sparks and salt mist during cutting, improving the surface finish of the workpiece, improving the strength of the sand wheel cutting piece, and magnesium fluoride has excellent mechanical strength, and the melting point of cryolite is only about 200℃, which can also play a certain role in cooling, and also has good lubricating effect, and has a certain synergistic effect when used with cryolite.

[0046] In the present application, the addition of garnet and magnesium fluoride improves the cutting resistance and sharpness, effectively improves the service life, and improves the production efficiency.

[0047] In the present application, the addition of phenolic resin and ferric oxide enhances the wear resistance of the cutting piece, and prolongs the service life.

[0048] In one embodiment, the components include the following mass percentages: 28-32% white corundum, 14-16% single crystal corundum, 4-6% zirconium corundum, 4-5% magnesium fluoride, 3.5-4% garnet, 8-10% cryolite, 16-18% liquid phenolic resin, 12-15% powdered phenolic resin, and 1.5-2% ferric oxide.

[0049] In one embodiment, the components include the following mass percentages: 30.5% white corundum, 15.5% single crystal corundum, 5% zirconium corundum, 4.8% magnesium fluoride, 3.8% garnet, 8.5% cryolite, 16.1% liquid phenolic resin, 14% powdered phenolic resin, 1.8% ferric oxide. At this mass percentage, the resulting cutting piece has better wear resistance and sharpness.

[0050] In one embodiment, the white corundum includes 60 mesh white corundum, 80 mesh white corundum and 100 mesh white corundum.

[0051] The mass ratio of the 60 mesh white corundum, 80 mesh white corundum and 100 mesh white corundum is (40-50):(8-10):(8-10).

[0052] By using three particle sizes of white corundum, it can be better stacked, with good filling effect, low porosity, and better combination with resin, improving sharpness and wear resistance.

[0053] In one embodiment, the mass ratio of the 60 mesh white corundum, 80 mesh white corundum and 100 mesh white corundum is 43:9:9.

[0054] In one embodiment, the particle size of the single crystal corundum is 40-100 mesh.

[0055] In one embodiment, the particle size of the single crystal corundum is 60 mesh.

[0056] In one embodiment, the particle size of the zirconium corundum is 40-100 mesh.

[0057] In one embodiment, the particle size of the zirconium corundum is 60 mesh.

[0058] In one embodiment, the particle size of the magnesium fluoride is 100-300 mesh.

[0059] In one embodiment, the particle size of the magnesium fluoride is 200 mesh.

[0060] In one embodiment, the particle size of the garnet is 200-300 mesh.

[0061] In one embodiment, the particle size of the garnet is 240 mesh.

[0062] In one embodiment, the particle size of the cryolite is 300-400 mesh.

[0063] In one embodiment, the particle size of the cryolite is 320 mesh.

[0064] By controlling the particle size of the single-crystal corundum, zirconium corundum, magnesium fluoride, garnet, and cryolite within the above range, the binding force with the phenolic resin can be effectively improved, the dispersibility of each raw material can be improved, and thus the strength, wear resistance, and sharpness can be improved.

[0065] In one embodiment, the liquid phenolic resin includes at least one of phenolic resin PR-23, phenolic resin PR-940, phenolic resin PR-55729, phenolic resin PR-50232, and phenolic resin PR-14170; and / or

[0066] The powdered phenolic resin includes at least one of phenolic resin PR-50099, phenolic resin PR-51794, phenolic resin PR-13355, phenolic resin PR-12987, phenolic resin PR-12687, and phenolic resin PR-PR-7031A.

[0067] One embodiment of the present application provides a preparation method of a grinding wheel cutting piece for cutting automobile cables and brake lines, including the following steps:

[0068] (1) mixing each raw material uniformly and pressing into a blank;

[0069] (2) first firing the blank at 40-55°C for 1-4h, then firing at 65-75°C for 2-5h, then firing at 95-105°C for 3-5h, then firing at 115-125°C for 3-5h, then firing at 150-170°C for 2-5h, and finally firing at 180-200°C for 3-5h, to obtain the grinding wheel cutting piece for cutting automobile cables and brake lines.

[0070] After the grinding wheel cutting piece is fired in multiple steps, the thickness precision of the cutting piece is controlled within ±(0.05)mm (measured at any point using a digital vernier caliper), and the flatness can be 0.05-0.1mm (the cutting piece is placed on a marble with a flatness of 0.02mm or less after polishing, a 0.1mm thick plug gauge is inserted between the cutting piece and the marble, and a circle is inserted along the outer circle of the cutting piece, none of which can be inserted), so that the thickness precision error of the cut product is small, the product quality consistency is high, and the size error rate is small.

[0071] The following examples are provided to facilitate an understanding of the present application. The provision of these examples is not intended to limit the scope of the claims.

[0072] Example 1

[0073] A grinding wheel cutting piece for cutting automobile cable and brake line comprises the following components in percentage by mass: 21.5% 60-mesh white corundum, 4.5% 80-mesh white corundum, 4.5% 100-mesh white corundum, 15.5% 60-mesh single crystal corundum, 5% 60-mesh zirconium corundum, 4.8% 200-mesh magnesium fluoride, 3.8% 240-mesh garnet, 8.5% 320-mesh cryolite, 8.3% phenolic resin PR-55729, 7.8% phenolic resin PR-940, 7.3% phenolic resin PR-50099, 6.7% phenolic resin PR-51794, 1.8% 320-mesh ferric sesquioxide.

[0074] The mass ratio of the 60-mesh white corundum, the 80-mesh white corundum and the 100-mesh white corundum is 43:9:9.

[0075] The preparation method of the grinding wheel cutting piece for cutting automobile cable and brake line comprises the following steps:

[0076] (1) uniformly mixing the white corundum, the single crystal corundum and the zirconium corundum, then uniformly mixing the phenolic resin PR-55729 and the phenolic resin PR-940, and then uniformly mixing the magnesium fluoride, the garnet, the cryolite, the phenolic resin PR-50099 and the phenolic resin PR-51794, and pressing at 8Mpa and 80℃ for 30s to obtain a blank;

[0077] (2) placing the blank in a hardening furnace for firing, first firing at 50℃ for 2.5h, then firing at 70℃ for 3h, then firing at 100℃ for 4h, then firing at 120℃ for 4h, then firing at 160℃ for 3h, and finally firing at 190℃ for 4h to obtain the grinding wheel cutting piece for cutting automobile cable and brake line.

[0078] Example 2

[0079] A grinding wheel cutting piece for cutting automobile cable and brake line comprises the following components in percentage by mass: 21.5% 60-mesh white corundum, 4.5% 80-mesh white corundum, 4.5% 100-mesh white corundum, 15.5% 60-mesh single crystal corundum, 5% 60-mesh zirconium corundum, 4.8% 200-mesh magnesium fluoride, 3.8% 240-mesh garnet, 8.5% 320-mesh cryolite, 8.3% phenolic resin PR-55729, 7.8% phenolic resin PR-940, 7.3% phenolic resin PR-50099, 6.7% phenolic resin PR-51794, 1.8% 320-mesh ferric sesquioxide.

[0080] The mass ratio of the 60-mesh white corundum, the 80-mesh white corundum and the 100-mesh white corundum is 43:9:9.

[0081] The preparation method of the grinding wheel cutting piece for cutting automobile cable and brake line comprises the following steps:

[0082] (1) the white corundum, single crystal corundum, zirconium corundum are mixed uniformly, then the phenolic resin PR-55729, phenolic resin PR-940 are mixed uniformly, then the magnesium fluoride, garnet, cryolite, phenolic resin PR-50099, phenolic resin PR-51794 are mixed uniformly, and the blank is obtained by pressing at 8Mpa and 80℃ for 30s;

[0083] (2) the blank is placed in a hardening furnace for firing, first fired at 50℃ for 2.5h, then at 70℃ for 3h, then at 100℃ for 4h, then at 120℃ for 4h, then at 160℃ for 3h, and finally at 190℃ for 4h, to obtain the grinding wheel cutting piece for cutting automobile cable and brake line.

[0084] Example 3

[0085] A grinding wheel cutting piece for cutting automobile cable and brake line, comprising the following components in mass percentage: 20% 60 mesh white corundum, 4% 80 mesh white corundum, 5% 100 mesh white corundum, 15% 60 mesh single crystal corundum, 5% 60 mesh zirconium corundum, 5% 200 mesh magnesium fluoride, 3% 240 mesh garnet, 10% 320 mesh cryolite, 9% phenolic resin PR-55729, 9% phenolic resin PR-940, 8% phenolic resin PR-50099, 5.8% phenolic resin PR-51794, 1.2% 320 mesh ferric oxide.

[0086] The mass ratio of 60 mesh white corundum, 80 mesh white corundum and 100 mesh white corundum is 40:8:10.

[0087] The preparation method of the grinding wheel cutting piece for cutting automobile cable and brake line comprises the following steps:

[0088] (1) the white corundum, single crystal corundum, zirconium corundum are mixed uniformly, then the phenolic resin PR-55729, phenolic resin PR-940 are mixed uniformly, then the magnesium fluoride, garnet, cryolite, phenolic resin PR-50099, phenolic resin PR-51794 are mixed uniformly, and the blank is obtained by pressing at 8Mpa and 80℃ for 30s;

[0089] (2) the blank is placed in a hardening furnace for firing, first fired at 50℃ for 2.5h, then at 70℃ for 3h, then at 100℃ for 4h, then at 120℃ for 4h, then at 160℃ for 3h, and finally at 190℃ for 4h, to obtain the grinding wheel cutting piece for cutting automobile cable and brake line.

[0090] Comparative Example 1

[0091] Comparative Example 1 is different from Example 1 in that the white corundum in Comparative Example 1 is a single particle size white corundum, and the others are the same.

[0092] A grinding wheel cutting piece for cutting automobile cables and brake lines comprising the following components in mass percent: 30.5% 60 mesh white corundum, 15.5% 60 mesh single crystal corundum, 5% 60 mesh zirconium corundum, 4.8% 200 mesh magnesium fluoride, 3.8% 240 mesh garnet, 8.5% 320 mesh cryolite, 8.3% phenolic resin PR-55729, 7.8% phenolic resin PR-940, 7.3% phenolic resin PR-50099, 6.7% phenolic resin PR-51794, 1.8% 320 mesh ferric oxide.

[0093] Comparative Example 2

[0094] Comparative Example 2 differs from Example 1 in that Comparative Example 2 white corundum is a single size white corundum, otherwise the same.

[0095] A grinding wheel cutting piece for cutting automobile cables and brake lines comprising the following components in mass percent: 30.5% 80 mesh white corundum, 15.5% 60 mesh single crystal corundum, 5% 60 mesh zirconium corundum, 4.8% 200 mesh magnesium fluoride, 3.8% 240 mesh garnet, 8.5% 320 mesh cryolite, 8.3% phenolic resin PR-55729, 7.8% phenolic resin PR-940, 7.3% phenolic resin PR-50099, 6.7% phenolic resin PR-51794, 1.8% 320 mesh ferric oxide.

[0096] Comparative Example 3

[0097] Comparative Example 3 differs from Example 1 in that Comparative Example 3 white corundum is a single size white corundum, otherwise the same.

[0098] A grinding wheel cutting piece for cutting automobile cables and brake lines comprising the following components in mass percent: 30.5% 100 mesh white corundum, 15.5% 60 mesh single crystal corundum, 5% 60 mesh zirconium corundum, 4.8% 200 mesh magnesium fluoride, 3.8% 240 mesh garnet, 8.5% 320 mesh cryolite, 8.3% phenolic resin PR-55729, 7.8% phenolic resin PR-940, 7.3% phenolic resin PR-50099, 6.7% phenolic resin PR-51794, 1.8% 320 mesh ferric oxide.

[0099] Comparative Example 4

[0100] Comparative Example 4 differs from Example 1 in that Comparative Example 4 does not contain cryolite, an equivalent amount of magnesium fluoride is substituted for the cryolite, otherwise the same.

[0101] A grinding wheel cutting piece for cutting automobile cable and brake line comprises the following components in mass percentage: 21.5% 60 mesh white corundum, 4.5% 80 mesh white corundum, 4.5% 100 mesh white corundum, 15.5% 60 mesh single crystal corundum, 5% 60 mesh zirconium corundum, 13.3% 200 mesh magnesium fluoride, 3.8% 240 mesh garnet, 8.3% phenolic resin PR-55729, 7.8% phenolic resin PR-940, 7.3% phenolic resin PR-50099, 6.7% phenolic resin PR-51794, 1.8% 320 mesh ferric sesquioxide.

[0102] Comparative Example 5

[0103] Comparative Example 5 is different from Example 1 in that Comparative Example 5 does not contain magnesium fluoride, and an equal amount of cryolite is used to replace the magnesium fluoride, and the others are the same.

[0104] A grinding wheel cutting piece for cutting automobile cable and brake line comprises the following components in mass percentage: 21.5% 60 mesh white corundum, 4.5% 80 mesh white corundum, 4.5% 100 mesh white corundum, 15.5% 60 mesh single crystal corundum, 5% 60 mesh zirconium corundum, 3.8% 240 mesh garnet, 13.3% 320 mesh cryolite, 8.3% phenolic resin PR-55729, 7.8% phenolic resin PR-940, 7.3% phenolic resin PR-50099, 6.7% phenolic resin PR-51794, 1.8% 320 mesh ferric sesquioxide.

[0105] Test Example

[0106] The grinding wheel cutting pieces obtained in Examples 1-5 and Comparative Examples 1-5 are subjected to cutting experiments, and are clamped on a cutting machine, the rotating speed is 3500 r / min, the cutting pressure is 50 N, and the cutting workpiece is an automobile spring pipe cable with a diameter of 9 mm, 10 of each example and comparative example are cut, and the average value is calculated.

[0107] The durability = the mass g of cutting automobile spring pipe cable / the mass g of grinding wheel loss.

[0108] The mass of grinding wheel wear = the mass of cutting piece before cutting - the mass of cutting piece after cutting.

[0109] Table 1

[0110] Durability g / g Worn mass / g Example 1 5.9 2.8 Example 2 5.1 3.9 Example 3 5.3 3.4 Comparative Example 1 3.0 8.7 Comparative Example 2 2.6 9.5 Comparative Example 3 2.4 10.2 Comparative Example 4 3.3 7.9 Comparative Example 5 3.5 7.4

[0111] Finally, it should be noted that the above examples are only used to illustrate the technical solutions of the present application, and are not intended to limit the protection scope of the present application. Although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or replaced by equivalents without departing from the essence and scope of the technical solutions of the present application.

Claims

1. A cutting wheel insert for cutting automotive cables and brake lines, characterized by, The components include the following mass percentages: 28-35% white corundum, 12-16% single crystal corundum, 3-6% zirconium corundum, 3-5% magnesium fluoride, 3-4% garnet, 7-10% cryolite, 15-18% liquid phenolic resin, 10-15% powdered phenolic resin, 1.2-2% diiron trioxide; The white corundum includes 60-mesh white corundum, 80-mesh white corundum and 100-mesh white corundum; the mass ratio of the 60-mesh white corundum, the 80-mesh white corundum and the 100-mesh white corundum is (40-50):(8-10):(8-10); The particle size of the magnesium fluoride is 100-300 mesh; The particle size of the garnet is 200-300 mesh; The particle size of the cryolite is 300-400 mesh.

2. The cutting wheel segment for cutting automobile cables and brake lines according to claim 1, characterized in that, The components include the following mass percentages: The components include the following mass percentages: 28-35% white corundum, 12-16% single crystal corundum, 3-6% zirconium corundum, 3-5% magnesium fluoride, 3-4% garnet, 7-10% cryolite, 15-18% liquid phenolic resin, 10-15% powdered phenolic resin, 1.2-2% diiron trioxide.

3. The cutting wheel segment for cutting automotive cables and brake lines of claim 1, wherein, The components include the following mass percentages: 28-35% white corundum, 12-16% single crystal corundum, 3-6% zirconium corundum, 3-5% magnesium fluoride, 3-4% garnet, 7-10% cryolite, 15-18% liquid phenolic resin, 10-15% powdered phenolic resin, 1.2-2% diiron trioxide.

4. The cutting wheel segment for cutting automotive cables and brake lines of claim 1, wherein, The mass ratio of the 60-mesh white corundum, the 80-mesh white corundum and the 100-mesh white corundum is 43:9:

9.

5. The cutting wheel segment for cutting automotive cables and brake lines of claim 1, wherein, The particle size of the single crystal corundum is 40-100 mesh; and / or The particle size of the zirconium corundum is 40-100 mesh.

6. The cutting wheel segment for cutting automotive cables and brake lines of claim 1, wherein, The liquid phenolic resin includes at least one of phenolic resin PR-23, phenolic resin PR-940, phenolic resin PR-55729, phenolic resin PR-50232, phenolic resin PR-14170; and / or The powdered phenolic resin includes at least one of phenolic resin PR-50099, phenolic resin PR-51794, phenolic resin PR-13355, phenolic resin PR-12987, phenolic resin PR-12687, phenolic resin PR-PR-7031A.

7. The method of making abrasive cutting segments for cutting automotive cables and brake lines as set forth in any one of claims 1-6, characterized in that, The steps include: (1) mixing each raw material uniformly and pressing into a blank; (2) first firing the blank at 40-55℃ for 1-4h, then firing at 65-75℃ for 2-5h, then firing at 95-105℃ for 3-5h, then firing at 115-125℃ for 3-5h, then firing at 150-170℃ for 2-5h, and finally firing at 180-200℃ for 3-5h, to obtain a grinding wheel cutting piece for cutting automobile cables and brake lines.