Disk repairing device as well as preparation method and application thereof

Abstract

The invention relates to a disc repairing device and a preparation method and application thereof, the disc repairing device comprises a disc body and a working layer arranged on the surface of the disc body, the working layer comprises a ceramic matrix and diamond particles distributed in the ceramic matrix, the size of the diamond particles is 80-120 meshes, and the mass ratio of the ceramic matrix to the diamond particles is 6: 1-2: 1. When the disc repairing device is used for repairing the abraded cast iron grinding disc after diamond grinding, hard spots, formed by diamond grinding, on the surface of the cast iron grinding disc can be efficiently and accurately removed, the surface precision of the repaired cast iron grinding disc is controlled within 0.01 mm, and therefore when the cast iron grinding disc grinds the diamond again, the surface precision of the cast iron grinding disc is controlled within 0.01 mm. The thickness deviation can be controlled within + / -0.005 mm, the finished product rate is high, it can be ensured that the working layer is not broken in the repairing process through the strong holding force of the ceramic base body and the diamond particles, the abrasion rate of the disc repairing device can be controlled in the repairing process, the service life is long, and the maintenance cost is reduced.

Description

Technical Field

[0001] This invention relates to the field of machining technology, and in particular to a dressing device, its preparation method, and its application. Background Technology

[0002] In diamond grinding, cast iron grinding discs are widely used as grinding tools due to their good self-sharpening and grinding efficiency. However, during long-term grinding of high-hardness diamonds, the surface of the cast iron grinding disc will develop pits, bumps, or flatness deviations due to continuous wear, which directly affects the accuracy and consistency of subsequent diamond grinding. Therefore, it is necessary to use a disc repairer to repair the surface of the worn cast iron grinding disc.

[0003] However, traditional dressing tools are made of cast iron and directly repair cast iron grinding discs after diamond grinding. On the one hand, these cast iron dressing tools cannot adapt to the "special wear state produced after cast iron grinding discs grind diamonds," making it difficult to efficiently remove the hard spots formed by the combination of diamond debris and cast iron on the surface of the cast iron grinding disc. This results in a large flatness error after the cast iron grinding disc is repaired, leading to unstable diamond yield when the cast iron grinding disc grinds diamonds again due to poor surface consistency. On the other hand, the wear of these cast iron dressing tools themselves cannot be reasonably controlled during repair, which not only increases the repetition of repair work but also indirectly causes problems such as increased maintenance costs of grinding tools and difficulty in improving processing efficiency in production. They are difficult to meet the stringent requirements of modern precision machining for the dressing process. Summary of the Invention

[0004] Therefore, it is necessary to provide a dressing device, its preparation method, and its application to address the above problems. The dressing device can efficiently and precisely repair worn cast iron grinding discs after grinding diamonds, ensuring the yield of finished products when the cast iron grinding discs are used to grind diamonds again, and has a long service life.

[0005] A disc repairer includes a disc body and a working layer disposed on the surface of the disc body. The working layer includes a ceramic matrix and diamond particles distributed in the ceramic matrix, wherein the size of the diamond particles is 80-120 mesh, and the mass ratio of the ceramic matrix to the diamond particles is 6:1-2:1.

[0006] In one embodiment, the ceramic matrix is ​​made of a boron oxide-zinc oxide-silicon dioxide system or an aluminum oxide-zirconia-silicon dioxide system;

[0007] And / or, the thickness of the working layer is 2mm-20mm.

[0008] In one embodiment, the ceramic matrix is ​​made of an alumina-zirconia-silica system, wherein the mass ratio of alumina, zirconia and silica is 5-7:2-4:0.5-2.

[0009] In one embodiment, there are multiple working layers, which are spaced apart circumferentially along the disk body.

[0010] In one embodiment, when the spacing is set, the angle between the centerlines of two adjacent working layers does not exceed 30°.

[0011] And / or, multiple working layers are symmetrically arranged;

[0012] And / or, the width of the working layer in the circumferential direction of the disk gradually decreases from the outside to the inside.

[0013] In one embodiment, when the width of the working layer gradually decreases from the outside to the inside in the circumferential direction of the disk, the reduction does not exceed 50%.

[0014] In one embodiment, the disc body includes an inner disc portion and an annular portion located around the inner disc portion. The inner periphery of the annular portion is connected to the outer periphery of the inner disc portion, and the surface of the annular portion is higher than the surface of the inner disc portion. The working layer is disposed on the surface of the annular portion.

[0015] In one embodiment, the radius of the inner disk is R1, the radius of the disk body is R, and 0.5≤R1 / R≤0.75.

[0016] A method for preparing the aforementioned dressing device includes the following steps:

[0017] The ceramic raw materials, diamond particles, and binder are mixed to obtain a mixture;

[0018] The mixture is pressed into shape to obtain a preform layer;

[0019] The prefabricated layer is welded to the surface of the disc body and then sintered to obtain a disc repairer with a working layer.

[0020] An application of the aforementioned dressing device, which is used to repair cast iron grinding discs for grinding diamonds.

[0021] Both the ceramic matrix and diamond particles possess high hardness and high wear resistance. Furthermore, the cutting edge size of 80-120 mesh diamond particles has an excellent match with the size of hard particles generated after diamond grinding on a cast iron grinding wheel. Therefore, this invention uses a ceramic matrix composite with diamond particles as the working layer of the dressing tool. By controlling the mass ratio of the ceramic matrix to the diamond particles and the size of the diamond particles, when the dressing tool is used to repair worn cast iron grinding wheels after diamond grinding, it can not only efficiently and accurately remove the hard particles formed on the surface of the cast iron grinding wheel due to diamond grinding, but also control the surface accuracy of the repaired cast iron grinding wheel within 0.01mm. Consequently, when the cast iron grinding wheel grinds diamond again, the thickness deviation can be controlled within ±0.005mm, resulting in a high yield. Moreover, the strong holding force of the ceramic matrix and diamond particles ensures that the working layer does not break during the repair process, and the wear rate of the dressing tool itself can be controlled during repair, resulting in a long service life and reduced maintenance costs. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this application or the conventional technology, the drawings used in the description of the embodiments or the conventional technology will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a top view of the repair device of the present invention;

[0024] Figure 2 for Figure 1 The cross-sectional view of the disc body AA in the disc repairer shown.

[0025] In the diagram: 10, disc body; 20, working layer; 101, inner disc section; 102, annular section. Detailed Implementation

[0026] To facilitate understanding of the present invention, it will be described in more detail below. However, it should be understood that the present invention can be implemented in many different forms and is not limited to the embodiments or examples described herein. Rather, these embodiments or examples are provided to make the disclosure of the present invention more thorough and complete.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the specification of this invention is for the purpose of describing particular embodiments or examples only and is not intended to limit the invention. The optional scope of the term "and / or" as used herein includes any one of two or more of the related listed items, as well as any and all combinations of the related listed items, including any two related listed items, any more related listed items, or a combination of all related listed items.

[0028] In this invention, numerical ranges are involved. Unless otherwise specified, the numerical ranges are considered continuous and include the minimum and maximum values ​​of the range, as well as every value between the minimum and maximum values. Furthermore, when the range refers to integers, it includes every integer between the minimum and maximum values ​​of the range. Additionally, when multiple ranges are provided to describe features or characteristics, the ranges may be merged. In other words, unless otherwise specified, all ranges disclosed herein should be understood to include any and all subranges to which they are included.

[0029] Long-term in-depth research has revealed that cast iron grinding discs produce hard particles after grinding diamonds. These particles include carbides inherent in the cast iron grinding disc itself, metal particles not fully removed during the grinding process, or hard agglomerates formed from them. These hard particles are approximately 100-200 μm in size and have a Vickers hardness of around 800-1000. To efficiently and accurately remove these hard particles, such as... Figures 1 to 2 As shown, the disc repairer provided by the present invention includes a disc body 10 and a working layer 20 disposed on the surface of the disc body 10. The working layer 20 includes a ceramic matrix and diamond particles distributed in the ceramic matrix. The size of the diamond particles is 80-120 mesh, and can be any value or a range between any two of 80 mesh, 85 mesh, 90 mesh, 95 mesh, 100 mesh, 105 mesh, 110 mesh, 115 mesh or 120 mesh. The mass ratio of the ceramic matrix to the diamond particles is 6:1-2:1, and can be any value or a range between any two of 6:1, 5:1, 4:1, 3:1 or 2:1.

[0030] Both the ceramic matrix and diamond particles possess high hardness and high wear resistance. Furthermore, the cutting edge size of the 80-120 mesh diamond particles has excellent matching with the size of the hard particles generated after diamond grinding on a cast iron grinding wheel. Therefore, this invention uses a ceramic matrix composite with diamond particles as the working layer 20 of the dressing tool. By controlling the mass ratio of the ceramic matrix to the diamond particles and the size of the diamond particles, when the dressing tool is used to repair worn cast iron grinding wheels after diamond grinding, it can not only efficiently and accurately remove the hard particles formed on the surface of the cast iron grinding wheel due to diamond grinding, but also control the surface accuracy of the repaired cast iron grinding wheel within 0.01mm. Consequently, when the cast iron grinding wheel grinds diamond again, the thickness deviation can be controlled within ±0.005mm, resulting in a high yield. Moreover, the strong holding force of the ceramic matrix and diamond particles ensures that the working layer does not break during the repair process, and the wear rate of the dressing tool itself can be controlled during repair, resulting in a long service life and reduced maintenance costs.

[0031] In addition, the chemical inertness of the ceramic matrix and diamond particles can prevent the working layer 20 from reacting chemically with the diamond debris remaining on the cast iron grinding wheel. This ensures both the cleanliness of the working layer 20 surface and the cleanliness of the repaired cast iron grinding wheel surface, as well as the service life of the working layer 20.

[0032] Different ceramic matrices have different hardnesses, which can be selected according to the requirements of repair efficiency and cost. Preferably, the ceramic matrix is ​​made of boron oxide-zinc oxide-silica system or aluminum oxide-zirconia-silica system. Furthermore, the ceramic matrix made of aluminum oxide-zirconia-silica system has a higher Vickers hardness, which can reach about 1200, enabling efficient cutting without wear. Moreover, when using aluminum oxide-zirconia-silica system, the toughening effect of zirconia can prevent the working layer 20 from cracking when impacting hard points. Therefore, the ceramic matrix is ​​preferably made of aluminum oxide-zirconia-silica system, wherein the mass ratio of aluminum oxide, zirconia and silica is 5-7:2-4:0.5-2, which can be any one of 5:4:1, 6:3:1, 7:2:1 or any range between two.

[0033] It should be noted that the present invention does not have any requirements for the disc body 10 of the repair tool, and conventional cast iron, No. 45 steel, etc. can be used.

[0034] Optionally, the thickness of the working layer 20 is preferably 2mm-20mm, and can be any value or a range between any two of 2mm, 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, 11mm, 12mm, 13mm, 14mm, 15mm, 16mm, 17mm, 18mm, 19mm or 20mm.

[0035] It should be noted that when the working layer 20 is set on the surface of the disk body 10, the working layer 20 can completely cover the surface of the disk body 10 or partially cover the surface of the disk body 10. Preferably, there are multiple working layers 20, and the multiple working layers 20 are arranged at intervals along the circumference of the disk body 10. In this way, the repair effect and efficiency will not be affected, and the cracking of the working layer 20 can be avoided.

[0036] When multiple working layers 20 are arranged at circumferential intervals along the disk body 10, the spacing between two adjacent working layers 20 is not limited; the spacing can be equal or unequal. Preferably, the spacing between two adjacent working layers 20 is equal, and more preferably, the multiple working layers 20 are arranged symmetrically. Furthermore, to ensure repair efficiency, the angle between the center lines of two adjacent working layers 20 does not exceed 45°, and more preferably, it does not exceed 30°.

[0037] Similarly, when multiple working layers 20 are arranged at circumferential intervals along the disc body 10, the size of each working layer 20 is not limited; they can be equal or unequal. Preferably, the size of each working layer 20 is equal. Because the edge of the cast iron grinding disc has a high linear velocity and wears quickly, to adapt to the wear pattern of the cast iron grinding disc, the width of each working layer 20 in the circumferential direction of the disc body 10 gradually decreases from the outside to the inside. In this way, the working layer 20 with a wide edge can fully repair the cast iron grinding disc, while narrowing from the outside to the inside avoids excessive repair of the center of the cast iron grinding disc. Therefore, it can not only efficiently repair the cast iron grinding disc but also ensure accuracy. Furthermore, when the width gradually decreases from the outside to the inside, the reduction range is not limited, but preferably the reduction range does not exceed 50%.

[0038] In some implementations, when the diamond size used for grinding on a cast iron grinding disc is small, the contact area between the diamond and the cast iron grinding disc cannot cover the entire surface of the disc. This leads to increased wear in the central area of ​​the disc due to continuous stress, resulting in a surface profile deviation with a low center and high edges. Therefore, the dressing device needs to achieve precise control during the repair process to ensure that the edge removal rate is greater than the center removal rate. To this end, a combination of... Figure 1 and Figure 2 As shown, the preferred disc body 10 includes an inner disc portion 101 and an annular portion 102 located around the inner disc portion 101. The inner periphery of the annular portion 102 is connected to the outer periphery of the inner disc portion 101, and the surface of the annular portion 102 is higher than the surface of the inner disc portion 101. The working layer 20 is disposed on the surface of the annular portion 102. Thus, during the repair process, the edge area can achieve higher cutting efficiency. In this way, the edge area of ​​the cast iron grinding disc can be repaired to the same height as the center area first, and then the front side can be repaired flat. This can avoid over-repairing the center area and ensure the surface accuracy of the repaired cast iron grinding disc.

[0039] Optionally, the radius of the inner disk portion 101 is R1, and the radius of the disk body 10 is R, where 0.5 ≤ R1 / R ≤ 0.75, and can be any point value among 0.5, 0.55, 0.6, 0.65, 0.7, or 0.75, or a range between any two.

[0040] This invention also provides a method for preparing the aforementioned dressing device, comprising the following steps:

[0041] The ceramic raw materials, diamond particles, and binder are mixed to obtain a mixture;

[0042] The mixture is pressed into shape to obtain a preform layer;

[0043] The prefabricated layer is welded to the surface of the disc body 10 and then sintered to obtain a disc repairer with a working layer 20.

[0044] It should be noted that the preparation method of the dressing device of the present invention is not limited to the above-mentioned preparation method. For example, ceramic raw materials can be sintered to form ceramics, and then crushed and mixed with diamond particles to prepare the working layer 20. However, the present invention mixes and presses the ceramic raw materials, diamond particles and binder into shape, and then sinters to prepare the working layer 20. During the sintering process, the ceramic raw materials react to form a ceramic matrix, which can make the ceramic matrix have a stronger holding force on the diamond particles.

[0045] The binder will evaporate during the sintering process and can be selected from polyvinyl alcohol, etc. The preferred amount is 5%-10% of the total mass of the mixture.

[0046] Optionally, in the step of pressing the mixture into shape, the pressure is preferably 6MPa-12MPa.

[0047] It is understandable that the sintering temperature can be matched according to the system of the ceramic matrix. For example, when the ceramic matrix is ​​prepared using a boron oxide-zinc oxide-silica system, the preferred sintering temperature is 900℃-1000℃, which can be any value or a range between 900℃, 910℃, 920℃, 930℃, 940℃, 950℃, 960℃, 970℃, 980℃, 990℃ or 1000℃. When the ceramic matrix is ​​prepared using an alumina-zirconia-silica system, the preferred sintering temperature is 1000℃-1300℃, which can be any value or a range between 1000℃, 1050℃, 1100℃, 1150℃, 1200℃, 1250℃ or 1300℃.

[0048] The present invention also provides an application of the aforementioned dressing device, which is used to repair cast iron grinding discs used for grinding diamonds. It can efficiently and accurately remove hard spots formed on the surface of the cast iron grinding disc due to diamond grinding, so that the surface accuracy of the repaired cast iron grinding disc is controlled within 0.01mm. As a result, when the cast iron grinding disc grinds diamonds again, the thickness deviation can be controlled within ±0.005mm, resulting in a high yield. Moreover, the dressing device itself has a low wear rate and a long service life during repair, thereby reducing maintenance costs.

[0049] It should be noted that the dressing device of the present invention is not limited to repairing worn cast iron grinding discs after grinding diamonds, but can also repair other grinding discs.

[0050] The technical solution of the present invention will be further described below through specific embodiments. However, those skilled in the art will understand that the following embodiments are only for illustrating the present invention and should not be regarded as limiting the scope of the present invention. Unless otherwise specified, specific conditions in the embodiments are performed under conventional conditions or conditions recommended by the manufacturer. Reagents or instruments used without specified manufacturers are all commercially available conventional products.

[0051] Example 1

[0052] Alumina, zirconium oxide and silica were mixed in a mass ratio of 6:3:1 and ball-milled at 300 r / min for 4 hours to produce micron-sized powder. The micron-sized powder was then mixed with 80-mesh diamond particles in a mass ratio of 4:1, and polyvinyl alcohol binder was added to obtain a mixed powder, wherein the mass fraction of polyvinyl alcohol in the mixed powder was 5%.

[0053] The mixed powder is cold-pressed under a pressure of 10 MPa to obtain a preform layer.

[0054] A Φ500 cast iron disc body is provided, comprising an inner disc portion and an annular portion surrounding the inner disc portion. The height difference between the surface of the annular portion and the surface of the inner disc portion is 5mm. The ratio of the radius R1 of the inner disc portion to the radius R of the disc body is R1 / R=0.6. Twelve prefabricated layers are then welded at intervals onto the annular portion of the disc body, followed by sintering to obtain a disc repairer with a working layer. The working layer has a thickness of 5mm, the angle between the centerlines of two adjacent working layers is 30°, and the width of the working layer gradually decreases by 50% from the outside to the inside in the circumferential direction of the disc body.

[0055] Example 2

[0056] Alumina, zirconium oxide and silica were mixed in a mass ratio of 5:4:1 and ball-milled at 300 r / min for 4 hours to prepare micron-sized powder. The micron-sized powder was then mixed with 100-mesh diamond particles in a mass ratio of 2:1, and polyvinyl alcohol binder was added to obtain a mixed powder, wherein the mass fraction of polyvinyl alcohol in the mixed powder was 5%.

[0057] The mixed powder is cold-pressed under a pressure of 10 MPa to obtain a preform layer.

[0058] A Φ500 cast iron disc body is provided, comprising an inner disc portion and an annular portion surrounding the inner disc portion. The height difference between the surface of the annular portion and the surface of the inner disc portion is 5mm. The ratio of the radius R1 of the inner disc portion to the radius R of the disc body is R1 / R = 0.75. Ten prefabricated layers are then welded at intervals onto the annular portion of the disc body and sintered to obtain a disc repairer with a working layer. The working layer has a thickness of 5mm, the angle between the centerlines of two adjacent working layers is 25°, and the width of the working layer gradually decreases from the outside to the inside in the circumferential direction of the disc body, with a reduction rate of 45%.

[0059] Example 3

[0060] Alumina, zirconium oxide and silica were mixed in a mass ratio of 7:2:1 and ball-milled at 300 r / min for 4 hours to prepare micron-sized powder. The micron-sized powder was then mixed with 120-mesh diamond particles in a mass ratio of 6:1. Polyvinyl alcohol binder was then added to obtain a mixed powder, wherein the mass fraction of polyvinyl alcohol in the mixed powder was 5%.

[0061] The mixed powder is cold-pressed under a pressure of 10 MPa to obtain a preform layer.

[0062] A Φ500 cast iron disc body is provided, comprising an inner disc portion and an annular portion surrounding the inner disc portion. The height difference between the surface of the annular portion and the surface of the inner disc portion is 5mm. The ratio of the radius R1 of the inner disc portion to the radius R of the disc body is R1 / R=0.5. Eight prefabricated layers are then welded at intervals onto the annular portion of the disc body, followed by sintering to obtain a disc repairer with a working layer. The working layer has a thickness of 10mm, the angle between the centerlines of two adjacent working layers is 35°, and the width of the working layer gradually decreases from the outside to the inside in the circumferential direction of the disc body, with a reduction rate of 30%.

[0063] Example 4

[0064] Boron oxide, zinc oxide and silicon dioxide were mixed in a mass ratio of 5:3:2 and ball-milled at 300 r / min for 4 hours to prepare micron-sized powder. The micron-sized powder was then mixed with 80-mesh diamond particles in a mass ratio of 4:1, and then polyvinyl alcohol binder was added to obtain a mixed powder, wherein the mass fraction of polyvinyl alcohol in the mixed powder was 5%.

[0065] The mixed powder is cold-pressed under a pressure of 10 MPa to obtain a preform layer.

[0066] A 45 steel disc body is provided, comprising an inner disc portion and an annular portion surrounding the inner disc portion. The height difference between the surface of the annular portion and the surface of the inner disc portion is 5 mm. The ratio of the radius R1 of the inner disc portion to the radius R of the disc body is R1 / R = 0.6. Twelve prefabricated layers are then welded at intervals onto the annular portion of the disc body and sintered to obtain a disc repairer with a working layer. The working layer has a thickness of 5 mm, the angle between the centerlines of two adjacent working layers is 30°, and the width of the working layer gradually decreases by 50% from the outside to the inside in the circumferential direction of the disc body.

[0067] Comparative Example 1

[0068] Iron powder, copper powder and tin powder are mixed in a mass ratio of 6:3:1 and mixed in a mixer for 4 hours to produce micron-sized powder. The micron-sized powder is then mixed with 80-mesh diamond particles in a mass ratio of 4:1. Polyvinyl alcohol binder is then added to obtain a mixed powder, wherein the mass fraction of polyvinyl alcohol in the mixed powder is 5%.

[0069] The mixed powder is cold-pressed under a pressure of 10 MPa to obtain a preform layer.

[0070] A Φ500 45 steel disc body is provided, comprising an inner disc portion and an annular portion surrounding the inner disc portion. The height difference between the surface of the annular portion and the surface of the inner disc portion is 5mm. The ratio of the radius R1 of the inner disc portion to the radius R of the disc body is R1 / R=0.6. Twelve prefabricated layers are then welded at intervals onto the annular portion of the disc body and sintered to obtain a disc repairer with a working layer. The working layer has a thickness of 5mm, the angle between the centerlines of two adjacent working layers is 30°, and the width of the working layer gradually decreases by 50% from the outside to the inside in the circumferential direction of the disc body.

[0071] Comparative Example 2

[0072] The only difference between Comparative Example 2 and Example 1 is that the diamond particles are 60 mesh in size.

[0073] Comparative Example 3

[0074] The only difference between Comparative Example 3 and Example 1 is that the diamond particles are 150 mesh in size.

[0075] Comparative Example 4

[0076] The only difference between Comparative Example 4 and Example 1 is that the micron-sized powder and 80-mesh diamond particles were mixed at a mass ratio of 1:1.

[0077] Comparative Example 5

[0078] The only difference between Comparative Example 5 and Example 1 is that the micron-sized powder and 80-mesh diamond particles were mixed at a mass ratio of 6:1.

[0079] The performance of the disc repair tools described in the above embodiments and comparative examples was tested, and the testing process is as follows:

[0080] After grinding 4-inch diamonds with a cast iron grinding disc for 100 hours, a height difference of approximately 700 μm was formed between the central grinding area and the edge area. Then, the disc was repaired using the dressing tools of the examples and comparative examples, and the repaired cast iron grinding disc was used again to grind 4-inch diamonds. The results are shown in Table 1.

[0081] Table 1 Test Results of the Disc Repair Tool

[0082]

[0083] As shown in Table 1, when the dressing device of this invention is used to repair cast iron grinding discs after diamond grinding, the surface accuracy of the repaired cast iron grinding discs can be controlled within 0.01 mm. Furthermore, when the cast iron grinding discs are used to grind diamonds again, the thickness deviation can be controlled within ±0.005 mm. Meanwhile, comparing Example 2 with Example 1, it can be seen that increasing the proportion of diamond particles in the working layer reduces the service life of the dressing device. Comparing Examples 3 and 4 with Example 1, it can be seen that reducing the amount of zirconium oxide or using a ceramic matrix of other systems reduces toughness, which in turn leads to a decrease in repair accuracy and service life.

[0084] Furthermore, comparing Example 1 and Comparative Example 1, it can be seen that although the repair efficiency is acceptable after using a metal matrix instead of a ceramic matrix to combine with diamond particles, the repair accuracy is poor and it is prone to clogging. After working for a period of time, the repairer needs to be repaired with a grinding wheel to restore the repair efficiency, resulting in a short service life. Comparing Example 1 and Comparative Examples 2-5, it can be seen that adjusting the size of the diamond particles and the mass ratio of the ceramic matrix to the diamond particles will reduce the repair accuracy and service life of the repairer.

[0085] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0086] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A disc dressing device, characterized in that, The dressing device includes a disc body and a working layer disposed on the surface of the disc body. The working layer includes a ceramic matrix and diamond particles distributed in the ceramic matrix. The size of the diamond particles is 80-120 mesh, and the mass ratio of the ceramic matrix to the diamond particles is 6:1-2:

1.

2. The dressing device according to claim 1, characterized in that, The ceramic matrix is ​​made of a boron oxide-zinc oxide-silicon dioxide system or an aluminum oxide-zirconia-silicon dioxide system. And / or, the thickness of the working layer is 2mm-20mm.

3. The dressing device according to claim 2, characterized in that, The ceramic matrix is ​​made of an alumina-zirconia-silica system, wherein the mass ratio of alumina, zirconia and silica is 5-7:2-4:0.5-2.

4. The dressing device according to claim 1, characterized in that, There are multiple working layers, which are spaced apart along the circumference of the disk body.

5. The dressing device according to claim 4, characterized in that, When setting the interval, the angle between the centerlines of two adjacent working layers shall not exceed 30°; And / or, multiple working layers are symmetrically arranged; And / or, the width of the working layer in the circumferential direction of the disk gradually decreases from the outside to the inside.

6. The dressing device according to claim 5, characterized in that, When the width of the working layer gradually decreases from the outside to the inside in the circumferential direction of the disk, the reduction range does not exceed 50%.

7. The dressing device according to any one of claims 1 to 6, characterized in that, The disc body includes an inner disc portion and an annular portion located around the outer periphery of the inner disc portion. The inner peripheral edge of the annular portion is connected to the outer peripheral edge of the inner disc portion, and the surface of the annular portion is higher than the surface of the inner disc portion. The working layer is disposed on the surface of the annular portion.

8. The dressing device according to claim 7, characterized in that, The radius of the inner disk is R1, and the radius of the disk body is R, where 0.5 ≤ R1 / R ≤ 0.

75.

9. A method for preparing a dressing device as described in any one of claims 1 to 8, characterized in that, Includes the following steps: The ceramic raw materials, diamond particles, and binder are mixed to obtain a mixture; The mixture is pressed into shape to obtain a preform layer; The prefabricated layer is welded to the surface of the disc body and then sintered to obtain a disc repairer with a working layer.

10. An application of a dressing device as described in any one of claims 1 to 8, characterized in that, The dressing tool is used to repair cast iron grinding discs used for grinding diamonds.

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