Grinding sheet

Abstract

The invention discloses a grinding piece, and relates to the technical field of grinding pieces, the grinding piece comprises a base body layer and a wear-resisting layer, the wear-resisting layer comprises wear-resisting pieces and supporting blocks which are alternately distributed, and the wear-resisting pieces and the supporting blocks are directly installed on the base body layer; the wear-resisting layer is composed of the wear-resisting piece and the supporting block which are installed on the base body layer, the supporting block can support the wear-resisting piece from the side direction of the wear-resisting piece, and therefore the tangential stress bearing capacity of the wear-resisting piece is improved, the overall hardness and toughness of the grinding face are guaranteed, and the grinding face is not prone to cracking or cracking or other defects. Meanwhile, the wear-resistant layer is detachably mounted on the base body layer, so that the wear-resistant layer can be independently replaced in a conventional state, the base body layer is reserved, and more cost is saved; and in addition, during use, the wear-resisting unit can abut against the interior of the mounting groove by inertia or friction force and cannot fall off.

Description

Technical Field

[0001] The present invention relates to the technical field of grinding, and particularly relates to a grinding disc. Background Art

[0002] A grinding disc is an important tool widely used in the fields of metal processing, stone cutting, glass grinding, etc. Its main function is to perform grinding processing by utilizing the friction between its hardness and abrasive and the surface of the workpiece. The grinding disc generally includes a metal sheet-shaped base layer, and a circular ring of high-temperature and wear-resistant material is covered on the surface edge of the base layer. The wear-resistant layer formed by this circular ring of high-temperature wear-resistant material mainly contacts the workpiece to be processed. During processing, the base layer is driven to rotate at a high speed by equipment such as an angle grinder, and the high-temperature wear-resistant layer is used to grind the workpiece to be processed.

[0003] The wear-resistant layer of the existing diamond grinding disc embeds diamond particles into a high-temperature resistant binder (usually resin, metal or ceramic), which is a tool for grinding or polishing hard materials. Although diamond itself has extremely high hardness and good grinding effect, during use, due to the fact that the hardness of the diamond particles is higher than that of the surrounding binder part, when subjected to a tangential force during grinding, the relatively soft binder around cannot form sufficient support for the granular diamond, and the diamond particles are prone to falling off from the grinding surface of the binder, resulting in chipping, cracking, etc. on the area of the grinding surface where the diamond particles fall off. Summary of the Invention

[0004] The main object of the present invention is to propose a grinding disc, aiming at the technical problem that the embedded diamond particles of the diamond grinding disc in the prior art are prone to falling off, resulting in chipping and cracking on the grinding surface.

[0005] To achieve the above object, a grinding disc proposed by the present invention includes: a base layer, one side of the base layer is a processing surface; a wear-resistant layer, including wear-resistant pieces and support blocks installed on the processing surface of the base layer; the wear-resistant pieces and the support blocks are alternately distributed along the circumferential direction of the base layer; the end faces of the wear-resistant pieces and the support blocks away from the base layer together form a grinding surface.

[0006] Optionally, the wear-resistant layer is composed of a plurality of wear-resistant units, and the plurality of wear-resistant units are evenly distributed along the circumferential direction of the working surface of the base layer; each wear-resistant unit includes a grinding part and a mounting part connected to each other, and the wear-resistant pieces and the support blocks together form the grinding part; an installation groove is formed on the processing surface of the base layer, the first side of the mounting part is in clearance fit with the installation groove, and the second side of the mounting part is in transition fit with the installation groove; the first side and the second side of the mounting part are respectively located in the upstream direction and the downstream direction of the rotation direction of the base layer. When the base layer rotates, the second side of the mounting part abuts against the side wall of the installation groove, and the second side of the mounting part is still located in the installation groove.

[0007] Optionally, the installation groove includes a main groove, a first limiting groove and a second limiting groove with openings facing the main groove; the first limiting groove and the second limiting groove are respectively distributed on both sides of the main groove; a first limiting protrusion is provided on the first side of the bottom end of the installation part, and a second limiting protrusion is provided on the second side of the installation part. The first limiting protrusion is in clearance fit with the first limiting groove, and the second limiting protrusion is in transition fit with the second limiting groove; when the second limiting protrusion abuts against the second limiting groove, the end of the first limiting protrusion away from the second limiting protrusion is still located in the first limiting groove.

[0008] Optionally, the top end of the installation part is in clearance fit with the main groove; the width of the second limiting protrusion is smaller than the clearance between the top end of the installation part and the main groove; the width of the first limiting protrusion is larger than the clearance between the top end of the installation part and the main groove.

[0009] Optionally, the first limiting protrusion is made of a thermal expansion material so that the first limiting protrusion expands when heated and is in interference fit with the first limiting groove.

[0010] Optionally, there is a second diversion groove between adjacent wear-resistant units.

[0011] Optionally, the grinding part includes a connected grinding surface and a diversion surface. The grinding surface is located upstream of the rotation direction of the base layer, and the diversion surface is located downstream of the rotation direction of the base layer; the end faces of the wear-resistant sheet and the support block away from the base layer together form the grinding surface; the diversion surface is arc-shaped, and one side of the diversion surface abuts against the grinding surface, and the other side of the diversion surface abuts against the end face of the adjacent wear-resistant unit and together forms the second diversion groove.

[0012] Optionally, there is also a heat-conducting layer on the processing surface of the base layer, and an installation groove is provided on the side of the heat-conducting layer away from the base layer.

[0013] Optionally, the heat-conducting layer is composed of several heat-conducting units; several heat-conducting units are circumferentially distributed on the working surface of the base layer, and the heat-conducting units correspond to the wear-resistant units one by one in number; installation grooves are provided on the heat-conducting units, and there are heat dissipation channels between adjacent heat-conducting units.

[0014] Optionally, the heat-conducting unit includes a main body part, a first heat dissipation area and a second heat dissipation area; the first heat dissipation area and the second heat dissipation area are distributed on both sides of the main body part; the installation groove is opened on the main body part; the first heat dissipation area cooperates with the second heat dissipation area of the adjacent heat-conducting unit to form a heat dissipation channel.

[0015] 1) In the technical solution of the present invention, the wear-resistant layer is arranged as alternately distributed wear-resistant pieces and support blocks, and both the wear-resistant pieces and the support blocks are directly installed on the substrate layer. During use, the wear-resistant pieces are used to grind the workpiece. The wear-resistant pieces are directly installed on the substrate layer, which can effectively prevent the wear-resistant pieces from falling off during work. When the wear-resistant pieces are in contact with the workpiece, they will be subjected to a tangential stress opposite to the rotation direction. At this time, the support blocks form a support for the wear-resistant pieces from the side of the wear-resistant pieces. Moreover, as the use time increases, the wear of the support blocks will be greater than that of the wear-resistant pieces. However, when the wear degree of the surface of the support blocks exceeds that of the wear-resistant pieces, during grinding, a small gap will be formed between the end faces of the support blocks and the working plane, and they will no longer be in contact with the workpiece. Only the end faces of the wear-resistant pieces will be in contact with the working plane, and there will be no further wear. At this time, the support blocks still form a support for both sides of the wear-resistant pieces. Thus, the bearing capacity of the tangential stress of the wear-resistant pieces is improved, and the problem that the wear-resistant pieces break or fall off from the working surface of the substrate layer during use is prevented. Until the wear-resistant pieces are worn to be flush with the end faces of the support blocks, the support blocks will further wear. After the wear degree of the end faces of the support blocks exceeds that of the wear-resistant pieces, during grinding, a situation where only the end faces of the wear-resistant pieces are in contact with the working plane will be formed again, and so on. For the grinding piece of the present invention, the wear-resistant layer is jointly composed of the wear-resistant pieces and the support blocks installed on the substrate layer. The support blocks can form a support for the wear-resistant pieces from the side of the wear-resistant pieces, thereby improving the bearing capacity of the wear-resistant pieces for tangential stress, and further ensuring the overall hardness and toughness of the grinding surface at the same time, so that the grinding surface is not prone to defects such as chipping or cracking.

[0016] 2) Meanwhile, the wear-resistant layer and the base layer of the present invention are detachably connected. The wear-resistant layer is set as several independent wear-resistant units, which are respectively installed in different installation grooves. The first side of the installation part of the wear-resistant unit is in clearance fit with the installation groove, and the second side is in transition fit with the installation groove. When there is no external force, the first side of the installation part can be first installed into the installation groove, and the whole installation part can be installed into the installation groove by using the clearance between the installation part and the installation groove. On the contrary, when disassembling, the second side of the installation part can be first taken out of the installation groove by using the clearance between the first side of the installation part and the installation groove, and then the whole installation part can be taken out of the installation groove, so as to realize the detachable connection between the wear-resistant layer and the heat-conducting layer. When the base layer rotates, the second side of the installation part is in the downstream direction of the rotation direction. Under the action of inertia, the second side of the installation part abuts against the installation groove, and at this time, the first side of the installation part is still located in the installation groove, and the wear-resistant unit will not fall off from the installation groove. During grinding, due to the wear-resistant layer being subjected to a frictional force opposite to the rotation direction, the second side of the installation part located downstream of the rotation direction is also abutted tightly in the installation groove, without loosening or falling. The wear-resistant layer of the present invention can be installed and removed through clearance fit, realizing that the wear-resistant layer can be replaced separately under normal conditions while retaining the base layer, which is more cost-saving; and during use, the wear-resistant unit will be abutted tightly in the installation groove by inertia or frictional force and will not fall off.

[0017] 3) The present invention also sets the first limiting protrusion of the installation part as a thermal expansion material. During use, the grinding surface of the wear-resistant layer frictions with the workpiece, and the temperature of the wear-resistant layer rises, so that the temperature of the first limiting protrusion rises, and then the thermal expansion material of the first limiting protrusion absorbs heat and expands. After the first limiting protrusion expands, it becomes an interference fit with the first limiting groove, so that the connection between the wear-resistant unit and the heat-conducting layer is tighter; by setting the first limiting protrusion as a thermal expansion material, through the thermal expansion of the thermal expansion material, the clearance fit between the first limiting groove and the first limiting protrusion is changed into an interference fit, further stabilizing the safety of the wear-resistant layer and the heat-conducting layer during the working state. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0019] Figure 1 It is a schematic structural diagram of Embodiment 1 of the present invention; Figure 2 It is a schematic side view of Embodiment 1 of the present invention; Figure 3 is Figure 2 the sectional view schematic diagram of A-A in Figure 4 the structural schematic diagram of the support block provided with the first diversion groove in the first embodiment; Figure 5 the structural schematic diagram of the second embodiment of the present invention; Figure 6 the top view schematic diagram of the second embodiment of the present invention; Figure 7 is Figure 6 the sectional view schematic diagram of B-B in Figure 8 the distribution schematic diagram of the heat conduction unit; Figure 9 the structural schematic diagram of the heat conduction unit; Figure 10 the top view schematic diagram of the heat conduction unit; Figure 11 the front view schematic diagram of the heat conduction unit; Figure 12 is Figure 11 the sectional view schematic diagram of C-C in, and in order to clarify the relative relationship between each structure and the base layer, the rotation direction during grinding is introduced in the figure; Figure 13 is Figure 10 the sectional view schematic diagram of D-D in Figure 14 the structural schematic diagram of the wear-resistant unit; Figure 15 the bottom view schematic diagram of the wear-resistant unit; Figure 16 the rear view schematic diagram of the wear-resistant unit; Figure 17 the installation schematic diagram of the wear-resistant unit and the heat conduction unit; Figure 18 the position relationship schematic diagram of the wear-resistant unit and the heat conduction unit during operation.

[0020] Explanation of the reference numerals in the drawings: 1. Base layer; 2. Heat conduction layer; 21. Heat conduction unit; 211. Main body part; 212. First heat dissipation area; 213. Second heat dissipation area; 214. Installation groove; 214a. Main body groove; 214b. First limiting groove; 214c. Second limiting groove; 22. Heat dissipation channel; 3. Wear-resistant layer; 31. Wear-resistant unit; 311. Grinding part; 311a. Grinding surface; 311b. Diversion surface; 312. Installation part; 312a. First limiting protrusion; 312b. Second limiting protrusion; 32. Second diversion groove; 4. Wear-resistant sheet; 5. Support block; 6. First diversion groove.

[0021] The realization, functional features, and advantages of the present invention will be further described in conjunction with embodiments and with reference to the accompanying drawings. Specific Embodiments

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts belong to the scope of protection of the present invention.

[0023] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of the present invention, then such directional indications are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the accompanying drawings). If this specific posture changes, then such directional indications will also change accordingly.

[0024] In addition, the descriptions involving "first", "second", etc. in the present invention are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, "and / or" throughout the text includes three scenarios. Taking A and / or B as an example, it includes the technical solution of A, the technical solution of B, and the technical solution that both A and B are satisfied at the same time. In addition, the technical solutions between various embodiments can be combined with each other, and it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0025] Embodiment 1: In this embodiment, as Figures 1 - 4 shown, a grinding sheet includes a base layer 1 and a wear-resistant layer 3. One side of the base layer 1 is a processing surface; the wear-resistant layer 3 includes wear-resistant pieces 4 and support blocks 5 installed on the processing surface of the base layer 1; the wear-resistant pieces 4 and the support blocks 5 are alternately distributed along the circumference of the base layer 1; the end faces of the wear-resistant pieces and the support blocks away from the base layer together form a grinding surface 311a.

[0026] During use, the wear-resistant piece 4 is used to grind the workpiece. The wear-resistant piece 4 is directly mounted on the base layer 1, which can effectively prevent the wear-resistant piece 4 from falling off during operation. When the wear-resistant piece 4 contacts the workpiece, it will be subject to a frictional force opposite to the rotation direction, and the frictional force forms a tangential stress on the wear-resistant piece 4. At this time, the support block 5 forms a support for the wear-resistant piece 4 from the side of the wear-resistant piece 4, forming a common support. As the use time increases, the wear of the support block 5 will be greater than that of the wear-resistant piece 4. However, when the wear degree of the surface of the support block 5 exceeds that of the wear-resistant piece 4, during grinding, a small gap is formed between the end face of the support block 5 and the working plane, and it will no longer contact the workpiece. Only the end face of the wear-resistant piece 4 contacts the working plane. The end face of the support block 5 will not be further worn. At this time, the support block 5 still supports the two sides of the wear-resistant piece 4, thereby improving the bearing capacity of the wear-resistant piece 4 for tangential stress, and thus preventing the wear-resistant piece 4 from breaking or falling off from the working surface of the base layer 1 during use. Until the wear-resistant piece 4 is worn to be flush with the end face of the support block 5, the support block 5 will be further worn. After the wear degree of the end face of the support block 5 exceeds that of the wear-resistant piece 4, during grinding, a situation where only the end face of the wear-resistant piece 4 contacts the working plane will be formed again, and so on until the entire wear-resistant layer 3 is lower than the safe use thickness. For the grinding piece of the present invention, the wear-resistant layer 3 is jointly composed of the wear-resistant piece 4 and the support block 5 mounted on the base layer 1. The support block 5 can form a support for the wear-resistant piece 4 from the side of the wear-resistant piece 4, thereby improving the bearing capacity of the wear-resistant piece 4 for tangential stress, and further ensuring the overall hardness and toughness of the grinding surface 311a at the same time, so that the grinding surface 311a is not prone to defects such as chipping or cracking.

[0027] In this embodiment, the bottom ends of the support block 5 and the wear-resistant piece 4 are detachably mounted on the base layer 1.

[0028] Optionally, as Figure 4 shown, a first diversion groove 6 is formed on the top end face of the support block 5. The first diversion groove 6 can be used to facilitate the passage of the cooling medium when grinding the workpiece, so that the cooling medium directly cools the wear-resistant layer 3; at the same time, it also facilitates the discharge of sparks, waste residues or particulate matters generated during grinding through the first diversion groove 6.

[0029] In this embodiment, the material of the base layer 1 is adaptively selected according to the grinding material, and preferably a steel base. The base layer 1 is an annular sheet body made of carbon steel or stainless steel, and the wear-resistant layer 3 is arranged in the area near the outer edge of the working surface of the base layer 1; a plurality of through holes are arranged in the inner ring area of the base layer 1, and these through holes are used to mount the base layer 1 on a power element (such as an angle grinder).

[0030] In this embodiment, the wear-resistant piece 4 is a thin sheet made of diamond; the support block 5 is a high-temperature resistant composite material, preferably resin, metal or ceramic.

[0031] Of course, the technical solution of the present invention is not limited to the thin sheet made of diamond. Its specific material is adaptively selected according to the workpiece to be ground. For example, when grinding high-hardness metals (such as hardened steel, cast iron, etc.), cubic boron nitride (CBN) can be selected; when grinding materials with relatively high hardness such as ceramics, glass, hardened steel, tool steel, etc., diamond material can be selected.

[0032] In the prior art, the high-temperature wear-resistant layer of the grinding sheet is usually integrally formed with the base layer or fixedly applied on the base layer, so that the high-temperature wear-resistant layer and the metal sheet base form a whole. However, the high-temperature wear-resistant layer is a consumable layer. As the use time increases, the high-temperature wear-resistant layer will also be gradually ground to be lower than the safe thickness. The existing grinding sheets cannot replace the high-temperature wear-resistant layer alone. Each time the grinding sheet is replaced, it is necessary to replace both the metal sheet base and the high-temperature wear-resistant layer at the same time, resulting in waste.

[0033] In this embodiment, the installation method of the wear-resistant sheet 4 and the support block 5 with the base layer 1 is detachable installation. Specifically, a plurality of card slots are provided on the base layer 1, and the bottom ends of the wear-resistant sheet 4 and the support block 5 are in interference fit with these card slots. By setting the wear-resistant sheet 4 and the support block 5 to be detachably installed with the base layer 1, during use, the wear-resistant layer 3 can also be replaced alone, which is more cost-saving.

[0034] Embodiment Two: In order to ensure the uniform machining of the workpiece by the wear-resistant layer 3, in the forming process of the technical solution of Embodiment One, a large number of wear-resistant sheets 4 and support blocks 5 need to be formed first; then these large numbers of wear-resistant sheets 4 and support blocks 5 are installed on the base layer 1 one by one, which results in a relatively low machining efficiency of the overall wear-resistant sheet.

[0035] To solve the above technical problems, on the basis of Embodiment One, this embodiment provides an alternative solution for the specific installation structure of the wear-resistant layer 3.

[0036] In this embodiment, as Figures 5 - 16 shown in a grinding sheet, the wear-resistant layer 3 is composed of a plurality of wear-resistant units 31, and the plurality of wear-resistant units 31 are evenly distributed circumferentially along the working surface of the base layer 1; the wear-resistant unit 31 includes a grinding part 311 and an installation part 312 that are connected to each other, and the grinding part 311 is composed of a plurality of alternately arranged wear-resistant sheets 4 and support blocks 5.

[0037] During the forming process, a plurality of wear-resistant sheets 4 and support blocks 5 are integrally formed into wear-resistant units 31 at one time, and then the wear-resistant layer 3 is installed on the base layer 1 to form a complete wear-resistant layer 3. During the installation, in this embodiment, only a small number of wear-resistant units 31 need to be installed on the base layer 1, thereby reducing the time required for installation.

[0038] In this embodiment, the first side of the installation part 312 is in clearance fit with the installation groove 214, and the second side of the installation part 312 is in transition fit with the installation groove 214, so that the installation part 312 can be detachably installed in the installation groove 214; the first side and the second side of the installation part 312 are respectively located in the upstream direction and the downstream direction of the rotation direction of the base layer 1. When the base layer 1 rotates, the second side of the installation part 312 abuts against the side wall of the installation groove 214, and the second side of the installation part 312 still remains in the installation groove 214.

[0039] Specifically, the wear-resistant layer 3 is set as a plurality of mutually independent wear-resistant units 31. These wear-resistant units 31 are respectively installed in different installation grooves 214. The first side of the installation part 312 of the wear-resistant unit 31 is in clearance fit with the installation groove 214, and the second side is in transition fit with the installation groove 214. When there is no external force, the whole installation part 312 can be installed into the installation groove 214 by first installing the first side of the installation part 312 into the installation groove 214 and using the clearance between the installation part 312 and the installation groove 214; conversely, when disassembling, the second side of the installation part 312 can be first taken out of the installation groove 214 by using the clearance between the first side of the installation part 312 and the installation groove 214, and then the whole installation part 312 can be taken out of the installation groove 214, so as to realize the detachable connection between the wear-resistant layer 3 and the heat-conducting layer 2. When the base layer 1 rotates, the second side of the installation part 312 is in the downstream direction of the rotation direction. Under the action of inertia, the second side of the installation part 312 abuts against the installation groove 214, and at this time the first side of the installation part 312 still remains in the installation groove 214, and the wear-resistant unit 31 will not fall out of the installation groove 214; during grinding, since the wear-resistant layer 3 is subjected to a frictional force opposite to the rotation direction, the second side of the installation part 312 located in the downstream of the rotation direction is also abutted tightly in the installation groove 214, without loosening or falling. The wear-resistant layer 3 of this embodiment can be installed and removed through clearance fit with the heat-conducting layer 2, realizing that the wear-resistant layer 3 can be replaced separately under normal conditions while retaining the base layer 1, which is more cost-saving; and during use, the wear-resistant unit 31 will be abutted tightly in the installation groove 214 by inertia or frictional force (as Figure 18 shown), and will not fall off.

[0040] In this embodiment, the upstream direction and the downstream direction of the rotation direction are relative positional relationships; the upstream direction of the rotation direction refers to the direction in which the grinding disc first contacts the object during rotation, and the direction after rotating to this position later is the downstream direction. Specifically, as Figure 10 shown by the rotation direction in, the first limiting groove 214b is located in the upstream direction of the second limiting groove 214c.

[0041] Specifically, as Figures 10 - 16 shown, the rotation direction is as Figure 12As shown in the figure, when the base layer 1 rotates, both the inertia or frictional force received by the wear-resistant unit 31 is opposite to the rotation direction. The inertia or frictional force will push the wear-resistant unit 31 to abut against the second side of the installation groove 214 (i.e., the direction of the second limiting groove 214c), so that during use, the installation part 312 cannot be taken out from the installation groove 214.

[0042] Optionally, the installation groove 214 includes a main groove 214a, a first limiting groove 214b and a second limiting groove 214c with an opening facing the main groove 214a; the first limiting groove 214b and the second limiting groove 214c are respectively distributed on both sides of the main groove 214a; a first limiting protrusion 312a is provided on the first side at the bottom end of the installation part 312, and a second limiting protrusion 312b is provided on the second side of the installation part 312. The first limiting protrusion 312a is in clearance fit with the first limiting groove 214b, and the second limiting protrusion 312b is in transition fit with the second limiting groove 214c; when the second limiting protrusion 312b abuts against the second limiting groove 214c, the end of the first limiting protrusion 312a far from the second limiting protrusion 312b is still located in the first limiting groove 214b.

[0043] Specifically, the length directions of the main groove 214a, the first limiting groove 214b and the second limiting groove 214c are all along the radial direction of the base layer 1. The main groove 214a penetrates from the top surface of the heat-conducting layer 2 to the base layer 1, that is, the mouth of the main groove 214a faces the wear-resistant layer 3. The mouths of the first limiting groove 214b and the second limiting groove 214c both face the main groove 214a.

[0044] Specifically, the radial widths of the first limiting groove 214b and the second limiting groove 214c gradually increase along the radial direction of the base layer 1. Correspondingly, the radial widths of the first limiting protrusion 312a and the second limiting protrusion 312b gradually increase; so that the contact area between the installation part 312 and the installation groove 214 is larger, and the heat of the wear-resistant layer 3 can be guided to the base layer 1 faster. The base layer 1 can be cooled by an external water source, coolant or cooling gas.

[0045] Optionally, the top end of the installation part 312 is in clearance fit with the main groove 214a; the width of the second limiting protrusion 312b is smaller than the clearance between the top end of the installation part 312 and the main groove 214a; the width of the first limiting protrusion 312a is larger than the clearance between the top end of the installation part 312 and the main groove 214a.

[0046] Specifically, when the first limiting protrusion 312a abuts against the first limiting groove 214b, the side surface of the second limiting protrusion 312b on the side far from the first limiting protrusion 312a should at least be flush with the side wall of the main groove 214a, or the second limiting protrusion 312b is completely located in the space of the main groove 214a.

[0047] Such asFigure 17 As shown, during installation, first place the first limiting protrusion 312a with a wider width in an inclined manner into the main body groove 214a, then rotate the first limiting protrusion 312a and press it into the first limiting groove 214b, and then fully press the first limiting protrusion 312a tightly into the first limiting groove 214b, so that the side wall of the installation part 312 near the first limiting protrusion 312a at the top fits with the side wall of the main body groove 214a. Finally, push the installation part 312 in the downstream direction of the rotation direction, so that the second limiting protrusion 312b enters the second limiting groove 214c. During disassembly, first push the wear-resistant unit 31 so that the side wall of the installation part 312 near the first limiting protrusion 312a at the top fits with the side wall of the main body groove 214a. At this time, the second limiting protrusion 312b is located in the main body groove 214a. Then incline the installation part 312 and gradually pull out the second limiting protrusion 312b from the main body groove 214a, and the entire wear-resistant unit can be removed.

[0048] To make the disassembly and installation processes easier, chamfers should be made at the edges of the main body groove 214a, the first limiting protrusion 312a, and the second limiting protrusion 312b. At the same time, the material of the wear-resistant unit 31 should have a slight elastic deformation ability to meet the possible slight deformations during the disassembly and installation processes.

[0049] In this embodiment, the main material of the wear-resistant unit 31 is the same as that of the support block 5. The support block 5 forms the main body of the grinding part 311. The wear-resistant sheets 4 are distributed at intervals on one side of the top surface of the grinding part 311 formed by the material of the support block 5, so that a grinding surface 311a formed by alternating wear-resistant materials and high-temperature-resistant materials is formed on one side of the top surface of the grinding part 311.

[0050] In this embodiment, the installation part 312 and the main material of the grinding part 311 are the same, both are high-temperature-resistant materials, and the installation part 312, the grinding part 311, and the wear-resistant sheets 4 on the top surface of the grinding part 311 are integrally cast or integrally sintered by powder metallurgy to form an integral wear-resistant unit 31.

[0051] In some other embodiments, the main material of the wear-resistant unit 31 can also be selected as the main material of the wear-resistant sheets 4. In this embodiment, the support blocks 5 are distributed at intervals on one side of the top surface of the grinding part 311, forming a grinding surface 311a formed by alternating wear-resistant materials and high-temperature-resistant materials.

[0052] In some embodiments, the first limiting protrusion 312a is made of a thermal expansion material, so that the first limiting protrusion 312a expands when heated and has an interference fit with the first limiting groove 214b.

[0053] Specifically, the first limiting protrusion 312a of the installation part 312 is made of a thermal expansion material. During use, the grinding surface 311a of the wear-resistant layer 3 frictions with the workpiece, causing the temperature of the wear-resistant layer 3 to rise. As a result, the temperature of the first limiting protrusion 312a also rises, causing the thermal expansion material of the first limiting protrusion 312a to absorb heat and expand. After the first limiting protrusion 312a expands, it becomes an interference fit with the first limiting groove 214b, making the connection between the wear-resistant unit 31 and the heat-conducting layer 2 tighter. By setting the first limiting protrusion 312a as a thermal expansion material, and through the thermal expansion of the thermal expansion material, the clearance fit between the first limiting groove 214b and the first limiting protrusion 312a is changed into an interference fit, further stabilizing the safety of the wear-resistant layer 3 and the heat-conducting layer 2 during operation.

[0054] Preferably, the first limiting protrusion 312a is a copper-based alloy, such as copper-lead alloy or copper-tin alloy, etc. Copper-based alloys have a relatively high coefficient of thermal expansion and better expansion effect when heated, and can better fix the wear-resistant unit 31 on the heat-conducting unit 21 during grinding. At the same time, copper-based alloys have good cold recovery performance, that is, after the operation of the grinding disc stops and the wear-resistant unit 31 cools down to room temperature, the first limiting protrusion 312a returns to the clearance fit with the first limiting groove 214b, facilitating the removal of the wear-resistant unit 31.

[0055] In some other embodiments, the first limiting protrusion 312a can also be made of an aluminum-based alloy, such as 6061 aluminum alloy, etc. Aluminum-based alloys have a lower cost compared to copper-based alloys.

[0056] In some other embodiments, in this embodiment, the top end of the installation part 312 can also expand, so that during grinding work, there is also an interference fit between the top end of the installation part 312 and the main body groove 214a, further fixing the wear-resistant unit 31.

[0057] Optionally, there is a second diversion groove 32 between two adjacent wear-resistant units 31.

[0058] Specifically, the second diversion groove 32 can be used to facilitate the passage of the cooling medium during grinding of the workpiece, enabling the cooling medium to directly cool the wear-resistant layer 3. At the same time, it also facilitates the discharge of waste residues or particulate matter generated during grinding through the second diversion groove 32.

[0059] Optionally, the grinding part 311 includes a connected grinding surface 311a and a diversion surface 311b. The grinding surface 311a is formed by the top surfaces of the alternately distributed wear-resistant pieces 4 and support blocks 5. The grinding surface 311a is located upstream of the rotation direction of the base layer 1. The diversion surface 311b is arc-shaped, and one side of the diversion surface 311b abuts against the grinding surface 311a, and the other side of the diversion surface 311b abuts against the end surface of the adjacent wear-resistant unit 31 and together forms the second diversion groove 32.

[0060] Specifically, the diversion surface 311b is arc-shaped and gradually descends in height from the side where the grinding surface 311a is located until the diversion surface 311b abuts against the bottom end of the side wall of the adjacent wear-resistant unit 31, so that the diversion surface 311b and the side wall of the adjacent wear-resistant unit 31 form a second diversion groove 32 that sinks between two adjacent grinding surfaces 311a. The waste residues generated by the grinding of the grinding surface 311a in the upstream direction of the rotation direction and the workpiece can flow through the diversion surface 311b to the bottom of the second diversion groove 32 and are thrown out of the grinding sheet under the action of the centrifugal force of the high-speed rotation of the base layer 1, thus avoiding the influence on the grinding effect caused by the inability to discharge the particulate matter generated by grinding.

[0061] Embodiment Three: In the prior art, the wear-resistant layer is usually welded to the base layer or directly integrally formed with the base layer, so the strength of the base layer will not be damaged.

[0062] In the above embodiment, detachably installing a plurality of wear-resistant sheets 4 and support blocks 5 on the base layer 1 will, to a certain extent, damage the strength of the base layer 1 itself.

[0063] Based on any of the above embodiments, this embodiment provides an alternative solution for the specific structure of the base layer 1.

[0064] In this embodiment, as Figures 5 - 16 shown, a heat-conducting layer 2 is further provided on the processing surface of the base layer 1, and the installation groove 214 for installing the wear-resistant layer 3 is opened on the side of the heat-conducting layer 2 away from the base layer 1. The heat-conducting layer 2 is used to support the wear-resistant layer 3 and at the same time forms a thickness reinforcement for the area of the base layer 1 for installing the wear-resistant layer 3; opening the installation groove 214 on the heat-conducting layer 2 will not only damage the strength of the base layer 1 itself but also improve the strength of the outer area of the base layer 1.

[0065] In this embodiment, the material of the heat-conducting layer 2 is selected as a material with good heat-conducting effect, such as metallic copper, etc.

[0066] In this embodiment, the heat-conducting layer 2 is welded to the base layer 1.

[0067] In some other embodiments, the material of the heat-conducting layer 2 can also be the same as that of the base layer 1, and the heat-conducting layer 2 and the base layer 1 are integrally forged or machined.

[0068] Optionally, the heat-conducting layer 2 is composed of a plurality of heat-conducting units 21; the plurality of heat-conducting units 21 are circumferentially distributed on the working surface of the base layer 1, and the heat-conducting units 21 correspond to the wear-resistant units 31 one by one in number; installation grooves 214 are opened on each of the heat-conducting units 21, and there is a heat dissipation channel 22 between adjacent heat-conducting units 21, and one side of the wear-resistant unit 31 covers the heat dissipation channel 22.

[0069] Specifically, when the grinding disc is working, the substrate layer 1 drives the entire heat-conducting layer 2 and wear-resistant layer 3 to rotate at a high speed, generating a high-speed air flow. The heat dissipation channels 22 are used for the entry and exit of these air flows, thereby taking away the heat of the heat-conducting layer 2. At the same time, if there is an external cooling medium (such as water, coolant, or cooling gas, etc.) to cool the grinding disc, these heat dissipation channels 22 are also conducive to the passage of the cooling medium, thereby improving the cooling effect.

[0070] Optionally, the heat-conducting unit 21 includes a main body portion 211, a first heat dissipation area 212, and a second heat dissipation area 213. The first heat dissipation area 212 and the second heat dissipation area 213 are distributed on both sides of the main body portion 211. The installation groove 214 is opened on the main body portion 211. The first heat dissipation area 212 cooperates with the second heat dissipation area 213 of the adjacent heat-conducting unit 21 to form the heat dissipation channel 22. There are a number of bumps on both sides of the main body portion 211, and the bumps on both sides of the main body portion 211 form the first heat dissipation area 212 and the second heat dissipation area 213. The bumps between two adjacent heat-conducting units 21 are cross-distributed to form a bent channel, and the bent channels between two adjacent heat-conducting units 21 constitute the heat dissipation channel 22.

[0071] Specifically, the bent channel can increase the contact area between the heat-conducting unit 21 and the cooling medium. At the same time, one side of the wear-resistant unit 31 covers the heat dissipation channel 22, which can make the cooling medium contact the bottom surface of the wear-resistant unit 31, which is more conducive to dissipating heat from the wear-resistant unit 31.

[0072] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention. Any equivalent structural transformation made under the inventive concept of the present invention by using the content of the specification and drawings of the present invention, or directly / indirectly applied in other related technical fields, is included in the patent protection scope of the present invention.

Claims

1. A grinding disc, characterized in that, Comprising: A base layer (1), one side of the base layer (1) being a processing surface; A wear-resistant layer (3), including wear-resistant pieces (4) and support blocks (5) mounted on the processing surface of the base layer (1); the wear-resistant pieces (4) and the support blocks (5) are alternately distributed along the circumferential direction of the base layer (1); the end faces of the wear-resistant pieces (4) and the support blocks (5) away from the base layer (1) together form a grinding surface (311a).

2. A grinding piece according to claim 1, characterized in that The wear-resistant layer (3) is composed of a plurality of wear-resistant units (31), and the plurality of wear-resistant units (31) are evenly distributed along the circumferential direction of the working surface of the base layer (1); The wear-resistant unit (31) includes a grinding part (311) and a mounting part (312) connected to each other, and the wear-resistant pieces (4) and the support blocks (5) together form the grinding part (311); An installation groove (214) is formed on the processing surface of the base layer (1), the first side of the installation part (312) is in clearance fit with the installation groove (214), and the second side of the installation part (312) is in transition fit with the installation groove (214); the first side and the second side of the installation part (312) are respectively located in the upstream direction and the downstream direction of the rotation direction of the base layer (1). When the base layer (1) rotates, the second side of the installation part (312) abuts against the side wall of the installation groove (214), and the second side of the installation part (312) is still located in the installation groove (214).

3. A grinding piece according to claim 2, characterized in that The installation groove (214) includes a main body groove (214a) and a first limiting groove (214b) and a second limiting groove (214c) with openings facing the main body groove (214a); The first limiting groove (214b) and the second limiting groove (214c) are respectively distributed on both sides of the main body groove (214a); A first limiting protrusion (312a) is provided on the first side of the bottom end of the installation part (312), a second limiting protrusion (312b) is provided on the second side of the installation part (312), the first limiting protrusion (312a) is in clearance fit with the first limiting groove (214b), and the second limiting protrusion (312b) is in transition fit with the second limiting groove (214c); When the second limiting protrusion (312b) abuts against the second limiting groove (214c), the end of the first limiting protrusion (312a) away from the second limiting protrusion (312b) is still located in the first limiting groove (214b).

4. A grinding disc according to claim 3, wherein, The top end of the installation part (312) is in clearance fit with the main body groove (214a); The width of the second limiting protrusion (312b) is smaller than the clearance between the top end of the installation part (312) and the main body groove (214a); The width of the first limiting protrusion (312a) is larger than the clearance between the top end of the installation part (312) and the main body groove (214a).

5. A grinding disc according to claim 4, wherein, The first limiting protrusion (312a) is made of a thermal expansion material, so that the first limiting protrusion (312a) expands when heated and has an interference fit with the first limiting groove (214b).

6. The grinding disc according to claim 3, characterized in that, A second diversion groove (32) is provided between two adjacent wear-resistant units (31).

7. A grinding disc according to claim 6, characterized in that, The grinding part (311) further includes a diversion surface (311b) connected to the grinding surface (311a). The grinding surface (311a) is located upstream of the rotation direction of the base layer (1), and the diversion surface (311b) is located downstream of the rotation direction of the base layer (1); The diversion surface (311b) is arc-shaped, and one side of the diversion surface (311b) abuts against the grinding surface (311a), and the other side of the diversion surface (311b) abuts against the end surface of the adjacent wear-resistant unit (31) and together forms the second diversion groove (32).

8. The grinding disc according to claim 2, wherein, A heat conduction layer (2) is further provided on the processing surface of the base layer (1), and an installation groove (214) is provided on the side of the heat conduction layer (2) away from the base layer (1).

9. A grinding disc according to claim 8, wherein, The heat conduction layer (2) is composed of a plurality of heat conduction units (21); the plurality of heat conduction units (21) are circumferentially distributed on the working surface of the base layer (1), and the heat conduction units (21) correspond to the wear-resistant units (31) one by one in number; Installation grooves (214) are provided on each of the heat conduction units (21), and a heat dissipation channel (22) is provided between two adjacent heat conduction units (21).

10. A grinding disc according to claim 9, characterized in that, The heat conduction unit (21) includes a main body part (211), a first heat dissipation area (212) and a second heat dissipation area (213); The first heat dissipation area (212) and the second heat dissipation area (213) are distributed on both sides of the main body part (211); The installation groove (214) is provided on the main body part (211); The first heat dissipation area (212) cooperates with the second heat dissipation area (213) of the adjacent heat conduction unit (21) to form the heat dissipation channel (22).

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