Grinding wheel and machining method thereof

Abstract

The invention relates to a grinding wheel and a machining method thereof, and belongs to the technical field of grinding machining. The grinding wheel comprises a grinding wheel base body, a plurality of first grinding parts and a plurality of second grinding parts, the grinding wheel base body is in a disc shape, the first grinding parts and the second grinding parts are evenly distributed on the grinding wheel base body along the periphery of the grinding wheel base body, the first grinding parts and the second grinding parts are arranged alternately, and the first grinding parts and the second grinding parts are arranged alternately. The main component of the first grinding part is a first grinding material, the main component of the second grinding part is a second grinding material, and the granularity of the first grinding material is smaller than that of the second grinding material. The grinding efficiency and quality are guaranteed, and meanwhile the service life of the grinding wheel is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of grinding processing, and in particular to a grinding wheel and a processing method thereof. Background Art

[0002] Grinding wheel is also called bonded abrasive tool. It is a bonded abrasive tool with a certain strength and ordinary abrasive is bonded into a certain shape by a binder. It is mainly composed of three parts: abrasive, matrix and binder.

[0003] At present, the general grinding in the industry generally adopts single abrasive processing, such as rough processing with coarse-grained abrasive and fine grinding with fine-grained abrasive, but these processing technologies are greatly limited when processing large excess of workpieces. When using coarse-grained abrasives, due to the high rotation speed of the grinding wheel and the difficulty of the abrasive falling off, it is easy to have a sudden increase in load during grinding, causing burns on the workpiece, or an alarm due to load tolerance. In order to ensure the efficiency and quality of grinding, only finer-grained abrasives with faster separation can be passively selected for grinding, but this will reduce the life of the grinding wheel. Summary of the invention

[0004] In view of this, the embodiments of the present disclosure provide a grinding wheel and a processing method thereof, which can ensure the efficiency and quality of grinding while ensuring the service life of the grinding wheel. The technical solution is as follows:

[0005] In a first aspect, a grinding wheel is provided, the grinding wheel comprising a grinding wheel base, a plurality of first grinding parts and a plurality of second grinding parts;

[0006] The grinding wheel base is disc-shaped;

[0007] The plurality of first grinding portions and the plurality of second grinding portions are evenly arranged on the grinding wheel base along the outer circumference of the grinding wheel base, and the first grinding portions and the second grinding portions are alternately arranged;

[0008] The first grinding part mainly comprises a first abrasive, the second grinding part mainly comprises a second abrasive, and the particle size of the first abrasive is finer than that of the second abrasive.

[0009] In a possible implementation, a chip groove is provided between the adjacent first grinding portion and the second grinding portion, and the chip groove extends in a radial direction of the grinding wheel base so as to separate the adjacent first grinding portion and the second grinding portion through the chip groove.

[0010] In a possible implementation, the width of the chip groove is 1 mm to 5 mm.

[0011] In a possible implementation manner, a ratio of a first arc occupied by the first grinding portion on the grinding wheel base to a second arc occupied by the second grinding portion on the grinding wheel base is 1:1.

[0012] In a possible implementation manner, a ratio of a first arc occupied by the first grinding portion on the grinding wheel base to a second arc occupied by the second grinding portion on the grinding wheel base is 1:m, wherein m>1.

[0013] In a possible implementation manner, a ratio of a first arc occupied by the first grinding portion on the grinding wheel base to a second arc occupied by the second grinding portion on the grinding wheel base is n:1, wherein n>1.

[0014] In a possible implementation, the plurality of first grinding portions and the plurality of second grinding portions are both located on an end surface of the grinding wheel base.

[0015] In a possible implementation, the components of the first grinding portion and the second grinding portion further include a bonding agent;

[0016] The first grinding part comprises at least one first grinding wheel segment formed by the bonding agent and the first abrasive, and the plurality of first grinding wheel segments of each first grinding part are arranged in sequence along the outer circumference of the end surface of the grinding wheel base;

[0017] The second grinding part comprises a plurality of second grinding wheel segments formed by the bonding agent and the second abrasive, and the plurality of second grinding wheel segments of each second grinding part are arranged in sequence along the outer circumference of the grinding wheel base;

[0018] Among them, there are chip grooves between two adjacent first grinding wheel segments and between adjacent first grinding wheel segments and second grinding wheel segments, and the chip grooves extend along the radial direction of the grinding wheel base to separate two adjacent first grinding wheel segments or adjacent first grinding wheel segments and second grinding wheel segments through the chip grooves.

[0019] In a possible implementation, the width of each of the chip removal grooves is consistent.

[0020] A second aspect provides a processing method, wherein the processing method uses the grinding wheel as described in any one of the first aspects to grind a workpiece, and comprises the following steps:

[0021] Select the types of the first abrasive and the second abrasive according to the type of workpiece material to be ground and the heat treatment method;

[0022] According to the requirements of the workpiece on the surface roughness, selecting the corresponding particle size range of the first abrasive;

[0023] Selecting a particle size range of the second abrasive according to the particle size range of the first abrasive;

[0024] Selecting the corresponding grinding wheel according to the particle size range of the first abrasive and the particle size range of the second abrasive;

[0025] The workpiece is ground using the selected grinding wheel.

[0026] In the scheme shown in the present disclosure, since the particle size of the first abrasive of the first grinding part of the grinding wheel is finer than the particle size of the second abrasive of the second grinding part, when grinding the workpiece, the wear rate of the first abrasive is greater than the wear rate of the second abrasive. In this process, the first abrasive with a larger degree of wear will not be able to contact the workpiece being ground and will be suspended in the air. At this time, the workpiece is mainly ground by the second abrasive until the degree of wear of the second abrasive is consistent with that of the first abrasive, and then the first abrasive and the second abrasive continue to grind the workpiece together. In this way, although the wear rate of the first abrasive is still relatively fast, when the wear degree of the first abrasive is greater than that of the second abrasive, the workpiece will be mainly ground by the second abrasive. Since the wear rate of the second abrasive is slower, the wear rate can be slowed down. In the process of the first abrasive and the second abrasive grinding the workpiece together, the surface roughness of the workpiece being ground can be achieved by grinding the first abrasive, thereby ensuring the accuracy of workpiece processing. When the workpiece is mainly ground by the second abrasive, since the first abrasive of the first grinding section between two adjacent second grinding sections is suspended, there is more heat dissipation space between the second grinding sections. Therefore, when the workpiece is ground by the coarse-grained second abrasive, there will be no problem of excessive load and burns of the workpiece. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0028] Figure 1 is a schematic structural diagram of a first type of grinding wheel provided in an embodiment of the present disclosure;

[0029] Figure 2 The embodiment of the present disclosure provides Figure 1 A schematic diagram of a local enlarged structure;

[0030] Figure 3 is a schematic structural diagram of a second grinding wheel provided in an embodiment of the present disclosure;

[0031] Figure 4is a schematic structural diagram of a third grinding wheel provided in an embodiment of the present disclosure;

[0032] Figure 5 is a schematic structural diagram of a fourth grinding wheel provided in an embodiment of the present disclosure;

[0033] Figure 6 is a schematic structural diagram of a fifth grinding wheel provided in an embodiment of the present disclosure;

[0034] Figure 7 It is a schematic diagram of the structure of the sixth grinding wheel provided in an embodiment of the present disclosure.

[0035] Description of Reference Numerals

[0036] 1. Grinding wheel base; 2. First grinding part; 21. First arc; 22. Third arc; 201. First grinding wheel segment; 202. First abrasive; 3. Second grinding part; 31. Second arc; 32. Fourth arc; 301. Second grinding wheel segment; 302. Second abrasive; 4. Binder; 5. Chip groove. DETAILED DESCRIPTION

[0037] In order to make the objectives, technical solutions and advantages of the present disclosure more clear, the embodiments of the present disclosure will be further described in detail below with reference to the accompanying drawings.

[0038] Grinding wheel is the most widely used type of grinding tool. It rotates at high speed when used, and can be used for rough grinding, semi-finishing grinding, fine grinding, grooving and cutting of the outer circle, inner circle, plane and various profiles of metal or non-metal workpieces. According to the different classifications of bonding agents 4, grinding wheels can be specifically ceramic bonding grinding wheels, resin bonding grinding wheels, rubber bonding grinding wheels, metal bonding grinding wheels, etc.

[0039] This embodiment specifically relates to a grinding wheel, such as Figure 1 The diagram shows the structure of the first type of grinding wheel. Figure 2 Shown Figure 1 A schematic diagram of the local enlarged structure of Figure 3 The diagram shows the structure of the second type of grinding wheel. Figure 4 The diagram shows the structure of the third type of grinding wheel. Figure 5 The diagram shows the structure of the fourth type of grinding wheel. Figure 6 The diagram shows the structure of the fifth type of grinding wheel. Figure 7 Shown is a schematic diagram of the structure of the sixth type of grinding wheel.

[0040] refer to Figure 1As shown, the grinding wheel comprises a grinding wheel base 1, a plurality of first grinding parts 2 and a plurality of second grinding parts 3. The grinding wheel base 1 is disc-shaped, and the plurality of first grinding parts 2 and the plurality of second grinding parts 3 are evenly arranged on the grinding wheel base 1 along the outer circumference of the grinding wheel base 1, and the first grinding parts 2 and the second grinding parts 3 are alternately arranged.

[0041] For example, the first grinding parts 2 and the second grinding parts 3 can be arranged alternately and evenly on the periphery of the end surface of the grinding wheel base 1, or can be arranged alternately and evenly on the outer edge of the grinding wheel base 1. The number of the first grinding parts 2 and the second grinding parts 3 can be two, three, or more. Figure 1 As shown, the number of the first grinding parts 2 and the number of the second grinding parts 3 are both 16. Figure 3 and Figure 4 As shown, the number of the first grinding part 2 and the number of the second grinding part 3 are both one. Figure 5 As shown, the number of the first grinding part 2 and the number of the second grinding part 3 are both two. Figure 6 and Figure 7 As shown, the number of the first grinding parts 2 and the number of the second grinding parts 3 are both eight.

[0042] refer to Figure 2 As shown, the main component of the first grinding section 2 is the first abrasive 202, and the first grinding section 2 may include at least one first grinding wheel segment 201 composed of a bonding agent 4 combined with the first abrasive 202. The main component of the second grinding section 3 is the second abrasive 302, and the second grinding section 3 may include at least one second grinding wheel segment 301 composed of a bonding agent 4 combined with the second abrasive 302.

[0043] For example Figure 1 , Figure 3 and Figure 4 As shown, each first grinding portion 2 may include only one first grinding wheel segment 201 , and each second grinding portion 3 may include only one second grinding wheel segment 301 .

[0044] For example Figure 5 As shown, each first grinding portion 2 may include eight first grinding wheel segments 201 , and each second grinding portion 3 may include eight second grinding wheel segments 301 .

[0045] For example Figure 6 As shown, each first grinding portion 2 may include only one first grinding wheel segment 201 , and each second grinding portion 3 may include three second grinding wheel segments 301 .

[0046] For example Figure 7 As shown, each first grinding portion 2 may include three first grinding wheel segments 201 , and each second grinding portion 3 may include only one second grinding wheel segment 301 .

[0047] In this way, the first grinding wheel segment 201 of the first grinding part 2 and the second grinding wheel segment 301 of the second grinding part 3 are alternately and evenly bonded to the outer periphery of the grinding wheel base 1, and each of the first grinding wheel segment 201 and the second grinding wheel segment 301 protrudes from the surface of the grinding wheel base 1, so that when the workpiece is ground, the first grinding wheel segment 201 and / or the second grinding wheel segment 301 contacts the surface of the workpiece, rather than the grinding wheel base 1 contacts the surface of the workpiece.

[0048] The first abrasive 202 and the second abrasive 302 may be brown corundum, white corundum, black silicon carbide, green silicon carbide, chrome corundum, single crystal corundum, microcrystalline corundum, zirconium corundum, etc.

[0049] During grinding, the workpiece is ground by the first abrasive 202 and the second abrasive 302 in the first grinding wheel segment 201 and the second grinding wheel segment 301, and the particle size of the first abrasive 202 is finer than that of the second abrasive 302. For example, the particle size of the first abrasive 202 may be 80 / 100, and the particle size of the second abrasive 302 may be 70 / 80; for another example, the particle size of the first abrasive 202 may be 60 / 70, and the particle size of the second abrasive 302 may be 40 / 45; for another example, the particle size of the first abrasive 202 may be 120 / 140, and the particle size of the second abrasive 302 may be 100 / 120.

[0050] As can be seen from the above, since the particle size of the first abrasive 202 of the first grinding part 2 of the grinding wheel is finer than the particle size of the second abrasive 302 of the second grinding part 3, when grinding the workpiece, the wear rate of the first abrasive 202 is greater than the wear rate of the second abrasive 302.

[0051] During this process, the first abrasive 202 with a greater degree of wear may not touch the workpiece being ground and may be suspended in the air. At this time, the workpiece is mainly ground by the second abrasive 302 until the degree of wear of the second abrasive 302 is consistent with that of the first abrasive 202, and then the first abrasive 202 and the second abrasive 302 continue to grind the workpiece together.

[0052] On the one hand, although the wear rate of the first abrasive 202 is still relatively fast, when the wear degree of the first abrasive 202 is greater than that of the second abrasive 302, the workpiece will be mainly ground by the second abrasive 302. Since the wear rate of the second abrasive 302 is slower, the wear rate can be slowed down.

[0053] In the process of grinding the workpiece together by the first abrasive 202 and the second abrasive 302 , the surface roughness of the ground workpiece can meet the requirements through the grinding of the first abrasive 202 , thereby ensuring the machining accuracy of the workpiece.

[0054] On the other hand, when the workpiece is mainly ground by the second abrasive 302, since the first abrasive 202 of the first grinding section 2 between two adjacent second grinding sections 3 is suspended, there is more heat dissipation space between each second grinding section 3. Therefore, when the coarse-grained second abrasive 302 grinds the workpiece, there will be no problem of excessive load and burns of the workpiece.

[0055] In one example, continue to refer to Figure 1 Combined with Figure 2 As shown, there is a chip groove 5 between the adjacent first grinding section 2 and the second grinding section 3, and the chip groove 5 extends along the radial direction of the grinding wheel base 1 to separate the adjacent first grinding section 2 and the second grinding section 3 through the chip groove 5. For example, there is a chip groove 5 between the adjacent first grinding wheel segment 201 and the second grinding wheel segment 301. In this way, due to the existence of the chip groove 5, there is a certain heat dissipation space between the adjacent first grinding wheel segment 201 and the second grinding wheel segment 301, thereby reducing the risk of excessive load and burns of the workpiece, and at the same time, the waste chips ground from the workpiece can be discharged through the chip groove 5.

[0056] In one example, the ratio of the first arc 21 occupied by the first grinding portion 2 on the grinding wheel base 1 to the second arc 31 occupied by the second grinding portion 3 on the grinding wheel base 1 is 1:1. In this way, the proportion occupied by the first grinding portion 2 is equal to the proportion occupied by the second grinding portion 3, so that the grinding wheel can adapt to most grinding conditions.

[0057] For example Figure 1 As shown, when each first grinding section 2 includes only one first grinding wheel segment 201, the arc occupied by each first grinding wheel segment 201 on the grinding wheel base 1 is the first arc 21. When each second grinding section 3 includes only one second grinding wheel segment 301, the arc occupied by each second grinding wheel segment 301 on the grinding wheel base 1 is the second arc 31.

[0058] The arc occupied by each first grinding wheel segment 201 on the grinding wheel base 1 is equal to the arc occupied by each second grinding wheel segment 301 on the grinding wheel base 1 .

[0059] Another example Figure 5 As shown, when each first grinding section 2 includes a plurality of first grinding wheel segments 201, the sum of the third arc 22 occupied by the first grinding wheel segments 201 of each first grinding section 2 on the grinding wheel base 1 is the first arc 21. When each second grinding section 3 includes a plurality of second grinding wheel segments 301, the sum of the fourth arc 32 occupied by the second grinding wheel segments 301 of each second grinding section 3 on the grinding wheel base 1 is the second arc 31.

[0060] The sum of the third arcs 22 occupied by the first grinding wheel segments 201 of each first grinding part 2 on the grinding wheel base 1 is equal to the sum of the fourth arcs 32 occupied by the second grinding wheel segments 301 of each second grinding part 3 on the grinding wheel base 1 .

[0061] In one example, the ratio of the first arc 21 occupied by the first grinding portion 2 on the grinding wheel base 1 to the second arc 31 occupied by the second grinding portion 3 on the grinding wheel base 1 is n:1, where n>1. For example, the value of n can be 1.5, 2, or 2.75. In this way, the proportion of the first grinding portion 2 and the first abrasive 202 with a finer particle size in the first grinding portion 2 can be increased, so that the grinding wheel can easily grind workpieces with higher surface roughness accuracy requirements.

[0062] For example Figure 3 As shown, the first grinding section 2 may include only one first grinding wheel segment 201 , and the second grinding section 3 may include only one second grinding wheel segment 301 .

[0063] The arc occupied by each first grinding wheel segment 201 on the grinding wheel base body 1 is greater than the arc occupied by each second grinding wheel segment 301 on the grinding wheel base body 1 .

[0064] Another example Figure 6 As shown, each first grinding section 2 may include a plurality of first grinding wheel segments 201, and the sum of the third arc 22 occupied by the first grinding wheel segments 201 of each first grinding section 2 on the grinding wheel base 1 is the first arc 21. When each second grinding section 3 may include only one second grinding wheel segment 301, the arc occupied by each second grinding wheel segment 301 on the grinding wheel base 1 is the second arc 31.

[0065] The sum of the third arcs 22 occupied by the first grinding wheel segments 201 of each first grinding portion 2 on the grinding wheel base 1 is greater than the arc occupied by each second grinding wheel segment 301 on the grinding wheel base 1 .

[0066] In one example, the ratio of the first arc 21 occupied by the first grinding portion 2 on the grinding wheel base 1 to the second arc 31 occupied by the second grinding portion 3 on the grinding wheel base 1 is 1:m, where m>1. For example, the value of m can be 1.25, 2.1, or 3. In this way, the proportion of the second grinding portion 3 and the coarser second abrasive 302 in the second grinding portion 3 can be increased, so that the grinding wheel can increase the efficiency of grinding the workpiece when the surface roughness requirement of the workpiece is low.

[0067] For example Figure 4 As shown, each first grinding portion 2 may include only one first grinding wheel segment 201 , and each second grinding portion 3 may include only one second grinding wheel segment 301 .

[0068] The arc occupied by each first grinding wheel segment 201 on the grinding wheel base 1 is smaller than the arc occupied by each second grinding wheel segment 301 on the grinding wheel base 1 .

[0069] Another example Figure 7 As shown, each first grinding section 2 may include only one first grinding wheel segment 201, and the arc occupied by each first grinding wheel segment 201 on the grinding wheel base 1 is the first arc 21. Each second grinding section 3 may include a plurality of second grinding wheel segments 301, and the sum of the fourth arc 32 occupied by the second grinding wheel segments 301 of each second grinding section 3 on the grinding wheel base 1 is the second arc 31.

[0070] The arc occupied by each first grinding wheel segment 201 on the grinding wheel base 1 is smaller than the sum of the fourth arcs 32 occupied by each second grinding wheel segment 301 of the second grinding portion 3 on the grinding wheel base 1 .

[0071] In one example, reference Figure 1 As shown, the plurality of first grinding portions 2 and the plurality of second grinding portions 3 are all located on the end surface of the grinding wheel base body 1 .

[0072] In this way, when the grinding wheel is grinding the workpiece, the first grinding wheel segments 201 of the plurality of first grinding parts 2 and / or the second grinding wheel segments 301 of the plurality of second grinding parts 3 may contact the workpiece at the same time, thereby improving the grinding efficiency of the grinding wheel. Compared with the grinding wheel in which the plurality of first grinding parts 2 and the plurality of second grinding parts 3 are all located at the outer edge of the grinding wheel base 1, it is more suitable for the working condition of large excess grinding.

[0073] In one example, the first grinding section 2 includes at least one first grinding wheel segment 201 formed by a bonding agent 4 and a first abrasive 202 , and a plurality of first grinding wheel segments 201 of each first grinding section 2 are sequentially arranged along the periphery of the end surface of the grinding wheel base 1 .

[0074] The second grinding part 3 includes a plurality of second grinding wheel segments 301 formed by bonding a bonding agent 4 with a second abrasive 302 . The plurality of second grinding wheel segments 301 of each second grinding part 3 are sequentially arranged along the outer circumference of the grinding wheel base 1 .

[0075] Among them, there is a chip groove 5 between two adjacent first grinding wheel segments 201 and between the adjacent first grinding wheel segments 201 and the second grinding wheel segments 301, and the chip groove 5 extends along the radial direction of the grinding wheel base 1 to separate the two adjacent first grinding wheel segments 201 or the adjacent first grinding wheel segments 201 and the second grinding wheel segments 301 through the chip groove 5.

[0076] For example Figure 5As shown, each first grinding section 2 includes eight first grinding wheel segments 201, each second grinding section 3 includes eight second grinding wheel segments 301, and chip grooves 5 are provided between two adjacent first grinding wheel segments 201 and between adjacent first grinding wheel segments 201 and second grinding wheel segments 301.

[0077] Another example Figure 7 As shown, each first grinding section 2 includes a first grinding wheel segment 201, each second grinding section 3 includes three second grinding wheel segments 301, and there are chip grooves 5 between two adjacent first grinding wheel segments 201 and between adjacent first grinding wheel segments 201 and second grinding wheel segments 301.

[0078] When the arc proportion occupied by the second grinding section 3 is the same, compared with each second grinding section 3 having only one second grinding wheel segment 301, each second grinding section 3 has multiple second grinding wheel segments 301, so that the second grinding wheel segments 301 of the grinding wheel can have more heat dissipation space, thereby reducing the possibility of excessive load and burns of the workpiece.

[0079] When the arc occupied by each second grinding wheel segment 301 is the same, each second grinding part 3 has multiple second grinding wheel segments 301, so that when the first abrasive 202 of the first grinding wheel segment 201 is suspended in the air, the second abrasive 302 of multiple second grinding wheel segments 301 can be in contact with the workpiece at the same time, making the second abrasive 302 less likely to wear, thereby increasing the service life of the grinding wheel.

[0080] In one example, the width of the chip groove 5 is 1 mm to 5 mm. For example, the width of the chip groove 5 can be 1 mm, 2.5 mm, or 5 mm. In this way, on the one hand, it can avoid that the width of the chip groove 5 is too small, which is easy to be blocked when there are many or large waste chips on the workpiece, not only making it impossible to discharge the waste chips, but also affecting the heat dissipation of the first grinding wheel segment 201 and the second grinding wheel segment 301; on the other hand, it can avoid that the width of the chip groove 5 is too large, which wastes space.

[0081] In one example, the width of each chip groove 5 is consistent. For example, the width of each chip groove 5 can be 1 mm, 2.5 mm, or 5 mm. In this way, the first grinding wheel segments 201 of each first grinding part 2 and the second grinding wheel segments 301 of the second grinding part 3 are evenly distributed, which can increase the service life of the grinding wheel.

[0082] In the disclosed embodiment, since the particle size of the first abrasive 202 of the first grinding portion 2 of the grinding wheel is finer than the particle size of the second abrasive 302 of the second grinding portion 3, when grinding the workpiece, the wear rate of the first abrasive 202 is greater than the wear rate of the second abrasive 302.

[0083] During this process, the first abrasive 202 with a greater degree of wear may not touch the workpiece being ground and may be suspended in the air. At this time, the workpiece is mainly ground by the second abrasive 302 until the degree of wear of the second abrasive 302 is consistent with that of the first abrasive 202, and then the first abrasive 202 and the second abrasive 302 continue to grind the workpiece together.

[0084] On the one hand, although the wear rate of the first abrasive 202 is still relatively fast, when the wear degree of the first abrasive 202 is greater than that of the second abrasive 302, the workpiece will be mainly ground by the second abrasive 302. Since the wear rate of the second abrasive 302 is slower, the wear rate can be slowed down.

[0085] In the process of grinding the workpiece together by the first abrasive 202 and the second abrasive 302 , the surface roughness of the ground workpiece can meet the requirements through the grinding of the first abrasive 202 , thereby ensuring the accuracy of workpiece processing.

[0086] On the other hand, when the workpiece is mainly ground by the second abrasive 302, since the first abrasive 202 of the first grinding section 2 between two adjacent second grinding sections 3 is suspended, there is more heat dissipation space between each second grinding section 3. Therefore, when the coarse-grained second abrasive 302 grinds the workpiece, there will be no problem of excessive load and burns of the workpiece.

[0087] This embodiment also provides a processing method, which uses any grinding wheel as described in the first aspect to grind a workpiece, and includes the following steps:

[0088] The types of the first abrasive 202 and the second abrasive 302 are selected according to the type of workpiece material to be ground and the heat treatment method. For example, when the workpiece material to be ground has a high tensile strength, the first abrasive 202 and the second abrasive 302 with high toughness are selected. When the workpiece material to be ground has a low hardness and a large elongation, the brittle first abrasive 202 and the second abrasive 302 are selected. When the workpiece material to be ground has a high hardness, the first abrasive 202 and the second abrasive 302 with a relatively high hardness are selected.

[0089] According to the requirements of the workpiece on the surface roughness, the corresponding particle size range of the first abrasive 202 is selected. For example, the particle size range of the first abrasive 202 can be selected as 80 / 100.

[0090] The particle size range of the second abrasive 302 is selected according to the particle size range of the first abrasive 202. For example, the particle size range of the second abrasive 302 can be selected to be 70 / 80 or 60 / 70.

[0091] A corresponding grinding wheel is selected according to the particle size range of the first abrasive 202 and the particle size range of the second abrasive 302 .

[0092] Grind the workpiece using the selected grinding wheel.

[0093] In this way, by preferentially selecting the first abrasive 202 with fine grains and then selecting the grain size of the second abrasive 302 , it is possible to ensure that the surface roughness meets the requirements of the workpiece.

[0094] In one example, it should be noted that before a formal grinding process is performed on a workpiece, a machining test needs to be performed first.

[0095] For example, when the first selection is made, a grinding wheel with a first abrasive 202 having a particle size range of 80 / 100 and a second abrasive 302 having a particle size range of 60 / 70 is selected. During the processing test, it is necessary to ensure that the grinding wheel load does not exceed 50%. A grinding wheel load exceeding 50% means that the load borne by the grinding wheel during operation exceeds 50% of the rated load of the grinding wheel. The rated load of the grinding wheel refers to the maximum load capacity of the grinding wheel under normal working conditions specified by the manufacturer. When the grinding wheel load exceeds 50%, the risk of burns to the workpiece is greater.

[0096] If the grinding wheel load does not exceed 50% during the first processing test, the selected grinding wheel can be used to grind the workpiece. If the grinding wheel load exceeds 50%, it is necessary to reselect a grinding wheel with a finer second abrasive 302. For example, the first abrasive 202 has a particle size range of 80 / 100, and the second abrasive 302 has a particle size range of 70 / 80.

[0097] If the grinding wheel load does not exceed 50% when the grinding wheel selected for the second time is used for the processing test, the workpiece can be ground using the grinding wheel selected for the second time. If the grinding wheel load still exceeds 50%, since the particle size range grade of the first abrasive 202 and the particle size range grade of the second abrasive 302 differ by only 1, only selecting a grinding wheel with a finer particle size of the second abrasive 302 again will make the particle size range of the first abrasive 202 the same as the particle size range of the second abrasive 302. Therefore, when selecting a grinding wheel for the third time, it is necessary to select a grinding wheel with a particle size of the first abrasive 202 and a particle size of the second abrasive 302 that are both finer than those selected for the second time.

[0098] If the grinding wheel load does not exceed 50% when the grinding wheel selected for the third time is used for the processing test, the workpiece can be ground using the grinding wheel selected for the third time. If the grinding wheel load still exceeds 50% when the grinding wheel selected for the third time is used for the processing test, a grinding wheel with a first abrasive 202 and a second abrasive 302 with a finer grain size than the last selection is continuously selected for the processing test until the grinding wheel load does not exceed 50%, and the corresponding grinding wheel can be used to formally process the workpiece.

[0099] In the disclosed embodiment, since the particle size of the first abrasive 202 of the first grinding portion 2 of the grinding wheel is finer than the particle size of the second abrasive 302 of the second grinding portion 3, when grinding the workpiece, the wear rate of the first abrasive 202 is greater than the wear rate of the second abrasive 302.

[0100] During this process, the first abrasive 202 with a greater degree of wear may not touch the workpiece being ground and may be suspended in the air. At this time, the workpiece is mainly ground by the second abrasive 302 until the degree of wear of the second abrasive 302 is consistent with that of the first abrasive 202, and then the first abrasive 202 and the second abrasive 302 continue to grind the workpiece together.

[0101] On the one hand, although the wear rate of the first abrasive 202 is still relatively fast, when the wear degree of the first abrasive 202 is greater than that of the second abrasive 302, the workpiece will be mainly ground by the second abrasive 302. Since the wear rate of the second abrasive 302 is slower, the wear rate can be slowed down.

[0102] In the process of grinding the workpiece together by the first abrasive 202 and the second abrasive 302 , the surface roughness of the ground workpiece can meet the requirements through the grinding of the first abrasive 202 , thereby ensuring the accuracy of workpiece processing.

[0103] On the other hand, when the workpiece is mainly ground by the second abrasive 302, since the first abrasive 202 of the first grinding section 2 between two adjacent second grinding sections 3 is suspended, there is more heat dissipation space between each second grinding section 3. Therefore, when the coarse-grained second abrasive 302 grinds the workpiece, there will be no problem of excessive load and burns of the workpiece.

[0104] It should be noted that the terms "first", "second", etc. in the specification and claims of the present disclosure are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present disclosure can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first", "second", etc. are generally of the same type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0105] The above are only preferred embodiments of the present disclosure and are not intended to limit the present disclosure. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present disclosure should be included in the protection scope of the present disclosure.

Claims

1. A grinding wheel, characterized in that: The grinding wheel comprises a grinding wheel base (1), a plurality of first grinding parts (2) and a plurality of second grinding parts (3); The grinding wheel base (1) is disc-shaped; The plurality of first grinding portions (2) and the plurality of second grinding portions (3) are evenly arranged on the grinding wheel base (1) along the outer periphery of the grinding wheel base (1), and the first grinding portions (2) and the second grinding portions (3) are arranged alternately; The first grinding part (2) mainly comprises a first abrasive (202), the second grinding part (3) mainly comprises a second abrasive (302), and the particle size of the first abrasive (202) is finer than that of the second abrasive (302).

2. The grinding wheel according to claim 1, characterized in that A chip removal groove (5) is provided between the adjacent first grinding portion (2) and the second grinding portion (3), and the chip removal groove (5) extends in the radial direction of the grinding wheel base (1) so as to separate the adjacent first grinding portion (2) and the second grinding portion (3) through the chip removal groove (5).

3. The grinding wheel according to claim 1, characterized in that: The ratio of a first arc (21) occupied by the first grinding portion (2) on the grinding wheel base (1) to a second arc (31) occupied by the second grinding portion (3) on the grinding wheel base (1) is 1:

1.

4. The grinding wheel according to claim 1, characterized in that The ratio of a first arc (21) occupied by the first grinding portion (2) on the grinding wheel base (1) to a second arc (31) occupied by the second grinding portion (3) on the grinding wheel base (1) is 1:m, wherein m>1.

5. The grinding wheel according to claim 1, characterized in that The ratio of a first arc (21) occupied by the first grinding portion (2) on the grinding wheel base (1) to a second arc (31) occupied by the second grinding portion (3) on the grinding wheel base (1) is n:1, wherein n>1.

6. The grinding wheel according to claim 1, characterized in that The plurality of first grinding portions (2) and the plurality of second grinding portions (3) are both located on the end surface of the grinding wheel base (1).

7. The grinding wheel according to claim 6, characterized in that The components of the first grinding part (2) and the second grinding part (3) further include a bonding agent (4); The first grinding section (2) comprises at least one first grinding wheel segment (201) formed by combining the bonding agent (4) with a first abrasive (202), and the plurality of first grinding wheel segments (201) of each first grinding section (2) are sequentially arranged along the outer periphery of the end surface of the grinding wheel base (1); The second grinding section (3) comprises a plurality of second grinding wheel segments (301) formed by combining the bonding agent (4) with a second abrasive (302), and the plurality of second grinding wheel segments (301) of each second grinding section (3) are arranged in sequence along the outer circumference of the grinding wheel base (1); Wherein, there is a chip groove (5) between two adjacent first grinding wheel segments (201) and between adjacent first grinding wheel segments (201) and second grinding wheel segments (301), and the chip groove (5) extends along the radial direction of the grinding wheel base (1) so as to separate two adjacent first grinding wheel segments (201) or adjacent first grinding wheel segments (201) and second grinding wheel segments (301) through the chip groove (5).

8. The grinding wheel according to claim 2 or 7, characterized in that: The width of the chip removal groove (5) is 1 mm to 5 mm.

9. The grinding wheel according to claim 2 or 7, characterized in that: The width of each chip removal groove (5) is consistent.

10. A processing method for grinding a workpiece, characterized in that: The processing method uses the grinding wheel according to any one of claims 1 to 9 to grind the workpiece, and comprises the following steps: Selecting the types of the first abrasive (202) and the second abrasive (302) according to the type of workpiece material to be ground and the heat treatment method; According to the requirements of the workpiece for surface roughness, selecting a corresponding particle size range of the first abrasive (202); Selecting a particle size range of the second abrasive (302) according to the particle size range of the first abrasive (202); Selecting the corresponding grinding wheel according to the particle size range of the first abrasive (202) and the particle size range of the second abrasive (302); The workpiece is ground using the selected grinding wheel.

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