Dry grinding composite structure grinding wheel

Abstract

The invention relates to a dry grinding composite structure grinding wheel, and belongs to the field of dry grinding wheels. Comprising a plurality of elastic grinding teeth and a grinding wheel base body, and the elastic grinding teeth are wound in the circumferential direction of the grinding wheel base body to form a grinding ring; each elastic grinding tooth comprises an installation section, an elastic transition section and a working section, the installation sections and the working sections are fixedly arranged at the two ends of the elastic transition sections in a one-to-one correspondence mode, the installation sections are fixedly arranged on the end face of one end of the grinding wheel base body, and air circulation slits are formed between the elastic transition sections and the working sections of every two adjacent elastic grinding teeth. A plurality of grinding strips which are prone to generating circumferential elastic displacement when being stressed during grinding are arranged in the working section in the radial direction at intervals, each grinding strip comprises a foil base plate which is not plastically deformed when being stressed during grinding and a diamond grinding layer, the foil base plate is fixedly connected with the working section, and the diamond grinding layer is fixedly connected to the side wall in front of the rotating direction of a grinding wheel of the foil base plate. According to the grinding wheel, the phenomenon of edge bursting easily generated when the grinding wheel grinds fragile materials is eliminated, and chip removal is optimized.

Description

Technical Field

[0001] This invention relates to the field of dry grinding wheels, and more particularly to a dry grinding composite structure grinding wheel. Background Technology

[0002] Currently, the most advanced technology for resin-bonded dry grinding ceramic diamond cup wheels is to use heat-resistant thermosetting resin materials (such as polyimide) as binders to adapt to high-temperature grinding conditions, and to use nickel-plated diamond abrasives to achieve interface bonding strengthening and thermal shock protection, thereby improving the holding force of the diamond and extending its service life.

[0003] However, due to the low elastic modulus of resin materials, even with nickel plating on the diamond (resulting in a burr-like appearance), it is still difficult to simultaneously meet the requirements of high-intensity grinding (such as large depth of cut) and minimal edge chipping. During the grinding process, diamond abrasive grains often exhibit phenomena such as collapse, displacement, rotation, and detachment. Therefore, resin-bonded grinding wheels typically require a higher concentration than metal-bonded wheels, and high-strength diamonds are not recommended to avoid low utilization and high costs caused by diamond detachment. On the other hand, choosing low-strength diamonds can easily lead to the diamonds on the grinding surface becoming brittle and resulting in a low exposed height. This reduces the space for dust removal, making it more difficult to remove, increases the frictional heat generated by the dust on the binder, easily causing burns, and significantly reduces the wear and tear on the binder, thus shortening its lifespan.

[0004] In summary, current resin-bonded grinding wheels exhibit several problems when grinding brittle materials (such as ceramics), including the tendency of diamond particles to collapse, shift, rotate, or fall off, resulting in chipping and difficulties in chip removal. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a dry grinding composite structure grinding wheel to solve the above-mentioned problem.

[0006] The technical solution of the present invention to solve the above-mentioned technical problems is as follows: A dry grinding composite structure grinding wheel includes: multiple elastic grinding teeth and a grinding wheel base. The multiple elastic grinding teeth are arranged circumferentially around the grinding wheel base to form a grinding ring. Each elastic grinding tooth includes: an installation section, an elastic transition section, and a working section. The installation section and the working section are fixedly disposed at both ends of the elastic transition section. The installation section is fixedly disposed on one end face of the grinding wheel base. An air flow slit is formed between the elastic transition sections and the working sections of two adjacent elastic grinding teeth. Multiple grinding strips that generate circumferential elastic displacement under grinding force are arranged radially at intervals inside the working section. Each grinding strip includes a foil substrate that undergoes non-plastic deformation under grinding force and a diamond grinding layer. The foil substrate is fixedly connected to the working section. The diamond grinding layer is fixedly bonded to the side wall in front of the foil substrate in the direction of grinding wheel rotation.

[0007] The beneficial effects of this invention are as follows: Airflow slits are formed between the elastic transition sections of adjacent elastic grinding teeth and between the working sections, which facilitates airflow convection and heat dissipation within and outside the grinding ring during dry grinding, ensuring stable grinding wheel performance. This also facilitates displacement and yaw of the elastic grinding teeth under stress. Multiple grinding strips, which generate circumferential elastic displacement under grinding stress, are radially spaced within the working section. This helps the grinding strips to shift or yaw under grinding stress, preventing them from being squeezed by external impacts, alleviating the rigidity of the grinding strips, and reducing or even eliminating the impact of the grinding wheel on brittle surfaces. The diamond grinding layer is prone to edge bursting during grinding of resin-bonded materials. By fixing the diamond grinding layer to the front of the foil substrate grinding wheel in the direction of rotation, the foil substrate can form a backing for the diamond grinding layer, providing support for the diamond particles during grinding, optimizing the holding effect of diamond particles, reducing the occurrence of diamond particles falling over, shifting, rotating, and falling off, improving the utilization rate of diamond, and allowing the selection of diamonds with higher strength than those used in existing resin-bonded grinding wheels, thereby improving the sharpness of the grinding wheel in dry grinding or heavy-duty grinding and the grinding wheel life. This can significantly reduce the overall diamond concentration required for the grinding wheel and reduce costs.

[0008] Based on the above technical solution, the present invention can be further improved as follows.

[0009] Furthermore, the mounting section, the elastic transition section, and the working section are all made of elastic thermoplastic material and are integrally molded through injection molding.

[0010] The beneficial effect of adopting the above-mentioned further solution is that by selecting a thermoplastic material with elasticity and manufacturing elastic grinding teeth through injection molding, the manufacturing process cost can be reduced.

[0011] Furthermore, a thermoplastic material is filled between two radially adjacent grinding strips, and the distance between two radially adjacent grinding strips is greater than 0 and less than 2 mm.

[0012] The beneficial effects of adopting the above-mentioned further solution are: filling the space between two radially adjacent grinding bars with thermoplastic material is beneficial for the grinding bars to shift or wobble when subjected to grinding force, avoiding the squeezing of other grinding bars under external impact, alleviating the rigidity of the grinding bars, and reducing or eliminating the chipping phenomenon that is easily generated when the grinding wheel grinds brittle materials.

[0013] Furthermore, the grinding bar is inclined or perpendicular to the reference surface of the grinding wheel.

[0014] The beneficial effects of adopting the above-mentioned further solution are: by adjusting the tilt angle, it is beneficial to adjust the ease with which diamond particles fall off, thereby adjusting the self-sharpening property, sharpness, and grinding environment of the grinding wheel.

[0015] Furthermore, the diamond grinding layer includes a binder and a plurality of diamond particles, wherein the diamond particles are fixed to one side wall of the foil substrate along the circumferential direction of the grinding wheel matrix by the binder, and the plurality of diamond particles are disposed in a single layer within the binder.

[0016] The beneficial effects of adopting the above-mentioned further solutions are: it helps to improve manufacturing efficiency and reduce material costs, and it helps to achieve the effect of grinding, cooling and chip removal immediately.

[0017] Furthermore, the width of the grinding bar along the radial direction of the grinding wheel matrix is ​​greater than three times the particle size of the diamond particles.

[0018] The beneficial effects of adopting the above-mentioned further solution are: it helps to form a protective layer between diamond particles on the grinding working surface in the radial direction, reduces the possibility of them being squeezed and falling off, and improves the utilization rate of diamond particles.

[0019] Furthermore, the thickness of the binder along the circumferential direction of the grinding wheel matrix is ​​15%-110% of the diameter of the diamond particles, or the thickness of the binder along the circumferential direction of the grinding wheel matrix is ​​greater than or equal to the diameter of the diamond particles, but less than twice the diameter of the diamond particles.

[0020] The beneficial effects of adopting the above-mentioned further scheme are as follows: when the circumferential thickness of the binder is less than the particle size of the diamond particles, the thermoplastic material acts as part of the binder, making the performance of the grinding wheel adaptable to the processing of different workpieces or different process parameters, thus improving the applicability range; when the circumferential thickness of the binder is greater than or equal to the particle size of the diamond particles, but less than twice the particle size of the diamond particles, it is beneficial to set the diamond particles in a single layer inside the binder, thereby improving manufacturing efficiency and reducing material costs, and achieving the effect of grinding, cooling and chip removal simultaneously.

[0021] Furthermore, the binder is a single-material binder or a composite-material binder.

[0022] The advantages of adopting the above-mentioned further solutions are: it is beneficial to consolidate diamond particles onto the circumferential sidewalls of the foil substrate through different consolidation methods, thereby enhancing the stability of diamond particle consolidation, improving work efficiency, and reducing costs.

[0023] Furthermore, the foil substrate is made of spring steel.

[0024] The beneficial effects of adopting the above-mentioned further solutions are: the spring steel material is conducive to making the foil substrate a rigid backing substrate, supporting the diamond particles under stress during operation, avoiding plastic deformation caused by the compression of the foil substrate by the diamond particles, which helps to reduce the binding requirements of the binder on the diamond particles, thereby reducing the performance difficulty of the binder and reducing the amount of high-value materials used, and thus reducing costs.

[0025] Furthermore, elastic grooves are provided on both sides of the elastic transition section along the circumferential direction of the grinding wheel base, and the elastic grooves penetrate the elastic transition section radially along the grinding wheel base.

[0026] The beneficial effects of adopting the above-mentioned further scheme are: it helps the elastic grinding teeth to generate elastic deformation, such as displacement and yaw, through the elastic groove when subjected to grinding force, thereby alleviating the rigidity characteristics of the elastic grinding teeth and reducing or even eliminating the chipping phenomenon that is easily generated when the grinding wheel grinds brittle materials.

[0027] Furthermore, multiple convection heat dissipation grooves are provided on both sides of the working section along the circumference of the grinding wheel base. The multiple convection heat dissipation grooves on one side of the working section along the circumference of the grinding wheel base are spaced apart along the axial direction of the grinding wheel base. The convection heat dissipation grooves penetrate the working section radially along the grinding wheel base.

[0028] The beneficial effect of adopting the above-mentioned further scheme is that the convection heat dissipation groove is conducive to forming airflow convection heat dissipation between two adjacent elastic grinding teeth.

[0029] Furthermore, the grinding bar also includes a heat sink, which is fixed on the sidewall of the foil substrate away from the diamond grinding layer.

[0030] The beneficial effects of adopting the above-mentioned further solution are: the heat sink facilitates heat dissipation through heat conduction during operation, avoids high-temperature burning of the bonding agent during grinding, and improves the grinding capability of the dry grinding wheel.

[0031] Furthermore, a resin grinding disc elastic tooth is provided between two adjacent elastic grinding teeth, and multiple elastic grinding teeth and multiple resin grinding disc elastic teeth are arranged alternately along the circumference of the grinding wheel base, and are all fixedly installed on one end face of the grinding wheel base.

[0032] The advantages of adopting the above-mentioned further solutions are: it facilitates the combination of elastic grinding teeth and resin grinding discs in the prior art to form a grinding ring, thereby reducing costs and increasing applicability.

[0033] Furthermore, it also includes a pressure plate and multiple consolidation auxiliary components. The pressure plate is an annular plate structure. The pressure plate is fixedly installed on one end face of the grinding wheel base through the consolidation auxiliary components. The outer peripheral surface of the pressure plate is in limiting contact with the elastic grinding teeth and the elastic teeth of the resin grinding disc.

[0034] The beneficial effect of adopting the above-mentioned further solution is that the pressure plate helps to enhance the fastening strength of the grinding ring on one end face of the grinding wheel matrix. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of the overall structure provided in Embodiment 1 of the present invention; Figure 2 This is a schematic diagram of the overall structure after being cut open according to Embodiment 1 of the present invention; Figure 3 This is a schematic diagram of the structure of the elastic grinding teeth provided in an embodiment of the present invention; Figure 4 for Figure 3 Enlarged schematic diagram of region I in the middle; Figure 5 This is a schematic diagram of the working section of the elastic grinding tooth provided in an embodiment of the present invention; Figure 6 for Figure 5 Enlarged schematic diagram of region G in the middle; Figure 7 A schematic diagram showing multiple grinding bars arranged radially at intervals within the working section, as provided in an embodiment of the present invention. Figure 8 for Figure 7 Enlarged schematic diagram of region E in the middle; Figure 9 A schematic diagram of a single layer of diamond particles disposed in a diamond grinding layer according to an embodiment of the present invention. Figure 1 ; Figure 10 A schematic diagram of a single layer of diamond particles disposed in a diamond grinding layer according to an embodiment of the present invention. Figure 2 ; Figure 11 This is an enlarged schematic diagram of the relationship between the workpiece and the grinding wheel during grinding, provided in an embodiment of the present invention. Figure 1 ; Figure 12 This is an enlarged schematic diagram of the relationship between the workpiece and the grinding wheel during grinding, provided in an embodiment of the present invention. Figure 2 ; Figure 13 A side view of the elastic grinding teeth when the grinding bar and the grinding wheel reference surface are set perpendicularly, as provided in an embodiment of the present invention; Figure 14 A side view of the elastic grinding teeth when the grinding bar and the grinding wheel reference surface are inclined, as provided in an embodiment of the present invention; Figure 15 A schematic diagram of the structure forming an airflow slit between the elastic transition sections and the working sections in two adjacent elastic grinding teeth, provided in an embodiment of the present invention; Figure 16 A schematic diagram of a grinding bar with heat sink provided in an embodiment of the present invention; Figure 17 for Figure 16 Enlarged schematic diagram of region F in the middle; Figure 18 This is a schematic diagram of the structure in which the elastic grinding teeth and the elastic teeth of the resin grinding disc abut in the circumferential direction, as provided in Embodiment 2 of the present invention.

[0036] The attached diagram lists the components represented by each number as follows: 1. Elastic grinding teeth; 2. Grinding wheel base; 3. Pressure plate; 4. Bonding auxiliary component; 5. Elastic teeth of resin grinding disc; 11. Mounting section; 12. Elastic transition section; 13. Working section; 14. Grinding bar; 51. Mounting section of elastic teeth of resin grinding disc; 52. Elastic transition section of elastic teeth of resin grinding disc; 53. Working section of elastic teeth of resin grinding disc; 54. Resin grinding disc; 121. Elastic groove; 131. Convection heat dissipation groove; 141. Foil substrate; 142. Diamond grinding layer; 143. Heat sink; 1421. Bonding agent; 1422. Diamond particles.

[0037] in, Figure 2 , Figure 13 and Figure 14 The arrow in the image indicates the direction of rotation of the grinding wheel. Figure 8 In this context, L represents the radial width of the grinding strip 14, and L1 represents the radial distance between two adjacent grinding strips 14. Figure 8 and Figure 9 In this context, 'd' represents the particle size of the diamond particle 1422. Figure 9 In this context, H represents the circumferential thickness of the binder 1421. Figure 11 and Figure 12 In this context, F1 represents the rotational tangential force exerted by the workpiece on the diamond particles 1422 that participate in the work of the elastic grinding teeth 1 when the grinding wheel is working, and F2 represents the axial pressure exerted by the workpiece on the diamond particles 1422 that participate in the work of the elastic grinding teeth 1 when the grinding wheel is working. Detailed Implementation

[0038] The principles and features of the present invention are described below. The examples given are only for explaining the present invention and are not intended to limit the scope of the present invention.

[0039] Example 1.

[0040] like Figures 1 to 17As shown, this embodiment provides a dry grinding composite structure grinding wheel, including: multiple elastic grinding teeth 1, a grinding wheel base 2, a pressure plate 3, and multiple fixing auxiliary components 4. The multiple elastic grinding teeth 1 are arranged around the circumference of the grinding wheel base 2 to form a grinding ring. Each elastic grinding tooth 1 includes: a mounting section 11, an elastic transition section 12, and a working section 13. The mounting section 11 and the working section 13 are fixedly fixed at both ends of the elastic transition section 12. The mounting section 11 is fixed to one end face of the grinding wheel base 2. Adjacent two... An airflow slit is formed between the elastic transition sections 12 and the working sections 13 in the elastic grinding teeth 1. Multiple grinding strips 14 are arranged radially at intervals inside the working section 13, which generate circumferential elastic displacement when subjected to grinding force. Each grinding strip 14 includes a foil substrate 141 that undergoes non-plastic deformation when subjected to grinding force and a diamond grinding layer 142. The foil substrate 141 is fixedly connected to the working section 13, and the diamond grinding layer 142 is fixed on the side wall in front of the grinding wheel rotation direction of the foil substrate 141. The pressure plate 3 is an annular plate structure. The pressure plate 3 is fixedly installed on one end face of the grinding wheel base 2 by the consolidation auxiliary component 4. The outer peripheral surface of the pressure plate 3 is in limiting contact with the mounting section 11 in the elastic grinding teeth 1, and the mounting sections 11 in two adjacent elastic grinding teeth 1 abut against each other.

[0041] It should be noted that in the technical solution of this embodiment, the air flow slit is a channel connecting the inner and outer diameters of the grinding ring formed by multiple elastic grinding teeth 1 arranged around the circumference of the grinding wheel base 2. The air flow slit makes the elastic transition section 12 and the working section 13 of two adjacent elastic grinding teeth 1 have a clearance fit, rather than abutting each other. The consolidation auxiliary component 4 is a screw. "Limited contact" means that an annular groove is provided on one end face of the grinding wheel base 2. The mounting section 11 of the elastic grinding teeth 1 is adapted to be fixed in the annular groove. The annular groove cooperates with the outer peripheral surface of the pressure plate 3, which is conducive to fastening the grinding ring formed by the multiple elastic grinding teeth 1 around the one end face of the grinding wheel base 2.

[0042] The beneficial effects of this embodiment are as follows: Airflow slits are formed between the elastic transition sections of adjacent elastic grinding teeth and between the working sections, which facilitates airflow convection and heat dissipation within and outside the grinding ring during dry grinding, ensuring stable grinding wheel performance. This also facilitates displacement and yaw of the elastic grinding teeth under stress. Multiple grinding strips, which generate circumferential elastic displacement under grinding stress, are radially spaced within the working section. This helps the grinding strips to shift or yaw under grinding stress, preventing them from being squeezed by external impacts, alleviating the rigidity of the grinding strips, and reducing or even eliminating the impact of the grinding wheel on brittle surfaces. The diamond grinding layer is prone to edge bursting during grinding of resin-bonded materials. By fixing the diamond grinding layer to the front of the foil substrate grinding wheel in the direction of rotation, the foil substrate can form a backing for the diamond grinding layer, providing support for the diamond particles during grinding, optimizing the holding effect of diamond particles, reducing the occurrence of diamond particles falling over, shifting, rotating, and falling off, improving the utilization rate of diamond, and allowing the selection of diamonds with higher strength than those used in existing resin-bonded grinding wheels, thereby improving the sharpness of the grinding wheel in dry grinding or heavy-duty grinding and the grinding wheel life. This can significantly reduce the overall diamond concentration required for the grinding wheel and reduce costs.

[0043] Preferably, the mounting section 11, the elastic transition section 12, and the working section 13 are all made of elastic thermoplastic material and are integrally molded by injection molding.

[0044] It should be noted that, in the preferred embodiment of the present invention, the thermoplastic material, in addition to having a certain degree of elasticity, also has the characteristics of good heat resistance and high fatigue strength.

[0045] The advantages of adopting the above preferred solution are: selecting a thermoplastic material with elasticity and manufacturing elastic grinding teeth through injection molding can reduce the manufacturing process cost.

[0046] Preferred, such as Figures 3 to 8 As shown, the space between two radially adjacent grinding strips 14 is filled with thermoplastic material, and the distance L1 between two radially adjacent grinding strips 14 is greater than 0 and less than 2 mm.

[0047] The beneficial effects of adopting the above preferred solution are: filling the space between two radially adjacent grinding bars with thermoplastic material is beneficial for the grinding bars to shift or wobble when subjected to grinding force, avoiding the squeezing of other grinding bars under external impact, alleviating the rigidity of the grinding bars, and reducing or eliminating the chipping phenomenon that is easy to occur when the grinding wheel grinds brittle materials.

[0048] Preferred, such as Figure 13 and Figure 14 As shown, the grinding bar 14 is inclined or perpendicular to the grinding wheel reference surface.

[0049] It should be noted that in the technical solution of this embodiment, the reference surface of the grinding wheel is the surface where the grinding wheel is connected to the motor flange; like Figure 11 and Figure 12 It is known that when the grinding wheel is working, it is subjected to the axial pressure F2 and the rotational tangential force F1 of the workpiece on the elastic grinding teeth 1. The area where the binder 1421 holds the diamond particles 1422 is the weakest in terms of holding force, which is the area between two adjacent diamond particles 1422, because the binder 1421 is the least in this area. When multiple diamond particles 1422 are arranged in a single circumferential layer within the binder 1421 and the distance between them and the foil substrate 141 is basically the same, that is, from Figure 11 and Figure 12 From a visual perspective, multiple diamond particles 1422 are arranged approximately in a planar manner. At this point, by connecting the areas where the bonding agent 1421 holds the diamond particles 1422 with the weakest holding force, a [structure / structure] is formed. Figure 11 and Figure 12 The dotted line surface in the diagram represents the weakest surface holding the diamond. The greater the inclination angle between the grinding strip 14 and the grinding wheel reference surface, the closer the axial pressure F2 direction during grinding is to the weak area where the binder 1421 holds the diamond particles 1422. The greater the component of the axial pressure F2 that the diamond particles 1422 experience along the direction of the foil substrate 141, the easier it is for the diamond particles 1422 to fall off, the more difficult it is to grind against each other (sharpen), and the easier it is to cause edge chipping. However, the self-sharpening property is better and the sharpness is higher, making it suitable for rigid and strong grinding. The smaller the inclination angle between the grinding strip 14 and the grinding wheel reference surface, the further away the axial pressure F2 direction during grinding is from the weak area where the binder 1421 holds the diamond particles 1422. The smaller the component of the axial pressure F2 on the diamond particles 1422 along the direction of the foil substrate 141, the more difficult it is for the diamond particles 1422 to fall off, which improves the utilization rate of the diamond particles 1422 and makes back-to-back running-in (sharpening) easier. However, it is easy to increase the number of working diamond particles 1422 participating in grinding (i.e., at each radial point of the grinding strip 14, there are more than 1 to less than 2 diamond particles participating in the work in the circumferential direction). This is beneficial to the improvement of life, but the load will increase, making it suitable for flexible grinding.

[0050] The beneficial effects of adopting the above-mentioned preferred scheme are: by adjusting the tilt angle, it is beneficial to adjust the ease with which diamond particles fall off, thereby adjusting the self-sharpening property, sharpness, and grinding scenario of the grinding wheel.

[0051] It should be noted that the grinding strip 14 is inclined relative to the grinding wheel reference surface, and the grinding strip 14 is inclined to the rear in the direction of rotation of the grinding wheel, with an inclination angle greater than or equal to 30 degrees and less than 90 degrees. If the tilt angle between the grinding strip 14 and the reference surface of the grinding wheel is greater than or equal to 90 degrees and less than 150 degrees, that is, the grinding strip 14 tilts forward in the direction of rotation of the grinding wheel, it is beneficial for the diamond particles on the grinding strip 14 to be passivated and fall off, that is, to improve self-sharpening. This is beneficial for fine-grained diamond grinding wheels to solve the problem of self-sharpening.

[0052] Preferred, such as Figures 7 to 10 As shown, the diamond grinding layer 142 includes a binder 1421 and a plurality of diamond particles 1422. The diamond particles 1422 are fixed to one side wall of the foil substrate 141 along the circumferential direction of the grinding wheel base 2 by the binder 1421. The plurality of diamond particles 1422 are disposed in a single layer within the binder 1421.

[0053] The advantages of adopting the above-mentioned preferred scheme are: it helps to improve manufacturing efficiency and reduce material costs, and it helps to achieve the effect of grinding, cooling and chip removal immediately.

[0054] Preferred, such as Figure 7 and Figure 8 As shown, the width L of the grinding bar 14 along the radial direction of the grinding wheel base 2 is greater than three times the particle size d of the diamond particles 1422.

[0055] It should be noted that, in the technical solution of this embodiment, the maximum width of the grinding strip 14 in the radial direction is such that the grinding strip 14 will not restrict the elastic displacement under force due to excessive rigidity (the wider the width, the stronger the rigidity) when it is working.

[0056] The advantages of adopting the above-mentioned preferred solution are: it helps to form a protective layer between diamond particles on the grinding surface in the radial direction, reduces the possibility of them being squeezed and falling off, and improves the utilization rate of diamond particles.

[0057] Preferred, such as Figure 9 As shown, the thickness H of the binder 1421 along the circumferential direction of the grinding wheel matrix 2 is 15%-110% of the particle size d of the diamond particle 1422, or the thickness H of the binder 1421 along the circumferential direction of the grinding wheel matrix 2 is greater than or equal to the particle size d of the diamond particle 1422, and less than twice the particle size d of the diamond particle 1422.

[0058] The advantages of adopting the above-mentioned preferred scheme are as follows: when the circumferential thickness of the binder is less than the particle size of the diamond particles, the thermoplastic material acts as part of the binder, making the performance of the grinding wheel adaptable to the processing of different workpieces or different process parameters, thus improving the applicability range; when the circumferential thickness of the binder is greater than or equal to the particle size of the diamond particles, but less than twice the particle size of the diamond particles, it is beneficial to set the diamond particles in a single layer inside the binder, thereby improving manufacturing efficiency and reducing material costs, and achieving the effect of grinding, cooling and chip removal simultaneously.

[0059] Preferred, such as Figure 9 and Figure 10 As shown, the binder 1421 is a single-material binder or a composite-material binder.

[0060] It should be noted that in the technical solution of this embodiment, the binder of a single material is an electroplating binder, a powder metallurgy binder of a single powder, or a brazing binder; the binder of the composite material is a powder metallurgy binder layer formed by mixing composite powders or an electroplating binder layer first formed by electroplating on the circumferential sidewall of the foil substrate 141, and then a powder metallurgy binder layer formed by powder metallurgy on the side of the electroplating binder layer away from the foil substrate 141, while a plurality of diamond particles 1422 are disposed in a single layer between the electroplating binder layer and the powder metallurgy binder layer.

[0061] The advantages of adopting the above-mentioned preferred scheme are: it is beneficial to solidify diamond particles on the circumferential sidewall of the foil substrate through different solidification methods, thereby enhancing the stability of diamond particle solidification, improving work efficiency, and reducing costs.

[0062] Preferably, the foil substrate 141 is made of spring steel, such as 65 manganese steel plate.

[0063] It should be noted that, in the technical solution of this embodiment, the hardness of the foil substrate 141 needs to be sufficient to prevent plastic deformation caused by the compression of the diamond particles 1422 when supporting the diamond particles 1422 during operation; the thickness of the foil substrate 141 is preferably relatively thin for economic reasons, so as to increase the wear rate of the grinding bar 14, thereby improving the self-sharpening property of the grinding wheel; under the premise of meeting the surface quality of the workpiece grinding, appropriately increasing the thickness of the foil substrate 141 is beneficial for the processing of large depth of cut of the grinding wheel.

[0064] The advantages of adopting the above preferred solution are: the spring steel material is conducive to making the foil substrate a rigid backing substrate, supporting the diamond particles under stress during operation, avoiding plastic deformation caused by the compression of the foil substrate by the diamond particles, which helps to reduce the binding requirements of the binder on the diamond particles, thereby reducing the performance difficulty of the binder and reducing the amount of high-value materials used, and thus reducing costs.

[0065] Preferred, such as Figure 13 and Figure 14 As shown, elastic grooves 121 are provided on both sides of the elastic transition section 12 along the circumferential direction of the grinding wheel base 2, and the elastic grooves 121 penetrate the elastic transition section 12 radially along the grinding wheel base 2.

[0066] It should be noted that in the technical solution of this embodiment, at least one elastic groove 121 is provided on each side wall of the elastic transition section 12 in the circumferential direction, and the elastic grooves 121 on the side walls of the elastic transition section 12 in the circumferential direction have a partially overlapping area in the radial direction, and are arranged vertically and horizontally at intervals in the axial direction, which is beneficial to ensure the strength of the elastic transition section 12 while providing better elastic performance.

[0067] The beneficial effects of adopting the above-mentioned preferred scheme are: it helps the elastic grinding teeth to generate elastic deformation, such as displacement and yaw, through the elastic groove when subjected to grinding force, thereby alleviating the rigidity characteristics of the elastic grinding teeth and reducing or even eliminating the chipping phenomenon that is easily generated when the grinding wheel grinds brittle materials.

[0068] Preferred, such as Figure 13 and Figure 14 As shown, multiple convection heat dissipation grooves 131 are provided on both sides of the working section 13 along the circumference of the grinding wheel base 2. The multiple convection heat dissipation grooves 131 on one side of the working section 13 along the circumference of the grinding wheel base 2 are spaced apart along the axial direction of the grinding wheel base 2. The convection heat dissipation grooves 131 penetrate the working section 13 radially along the grinding wheel base 2.

[0069] The beneficial effect of adopting the above preferred scheme is that the convection heat dissipation groove is conducive to forming airflow convection heat dissipation between two adjacent elastic grinding teeth.

[0070] Preferred, such as Figure 16 and Figure 17 As shown, the grinding bar 14 also includes a heat sink 143, which is fixed on the sidewall of the foil substrate 141 away from the diamond grinding layer 142.

[0071] The advantages of adopting the above-mentioned preferred solution are: the heat sink facilitates heat dissipation through heat conduction during operation, avoids high-temperature burning of the bonding agent during grinding, and improves the grinding capability of the dry grinding wheel.

[0072] Example 2.

[0073] like Figures 3 to 18As shown, this embodiment provides a dry grinding composite structure grinding wheel, including: multiple elastic grinding teeth 1, grinding wheel base 2, pressure plate 3, and multiple fixing auxiliary components 4; the elastic grinding teeth 1 include: mounting section 11, elastic transition section 12, and working section 13, the mounting section 11 and the working section 13 are fixedly fixed at both ends of the elastic transition section 12, the mounting section 11 is fixedly fixed on one end face of the grinding wheel base 2, and an air flow slit is formed between the elastic transition section 12 and the working section 13 of two adjacent elastic grinding teeth 1; multiple grinding strips 14 are radially spaced inside the working section 13, which generate circumferential elastic displacement under grinding force; the grinding strips 14 include a foil substrate 141 that undergoes non-plastic deformation under grinding force and a diamond grinding layer 142; the foil substrate 141 is fixedly connected to the working section 13, and the diamond grinding layer 142 is fixed on the side wall in front of the foil substrate 141 in the grinding wheel rotation direction; A resin grinding disc elastic tooth 5 is provided between two adjacent elastic grinding teeth 1. A grinding ring is formed by alternating arrangement of multiple elastic grinding teeth 1 and multiple resin grinding disc elastic teeth 5 along the circumference of the grinding wheel base 2, and all of them are fixedly installed on one end face of the grinding wheel base 2. The resin grinding disc elastic tooth 5 includes: a resin grinding disc elastic tooth mounting section 51, a resin grinding disc elastic tooth elastic transition section 52, and a resin grinding disc elastic tooth working section 53. The resin grinding disc elastic tooth mounting section 51 and the resin grinding disc elastic tooth working section 53 are fixedly disposed at both ends of the resin grinding disc elastic tooth elastic transition section 52. The resin grinding disc elastic tooth mounting section 51 is fixedly disposed on one end face of the grinding wheel base 2. In adjacent elastic grinding teeth 1 and resin grinding disc elastic teeth 5, air flow slits are formed between the resin grinding disc elastic tooth elastic transition section 52 and the elastic transition section 12, and between the resin grinding disc elastic tooth working section 53 and the working section 13. A resin grinding disc 54 is radially disposed inside the resin grinding disc elastic tooth working section 13. The pressure plate 3 is an annular plate structure. The pressure plate 3 is fixedly installed on one end face of the grinding wheel base 2 by the consolidation auxiliary component 4. The outer peripheral surface of the pressure plate 3 is in limiting contact with the mounting section 11 in the elastic grinding tooth 1 and the resin grinding disc elastic tooth mounting section 51 in the resin grinding disc elastic tooth 5.

[0074] In the technical solution of this embodiment, the airflow slit is a channel connecting the inner and outer diameters of the grinding ring formed by the multiple elastic grinding teeth 1 and the multiple resin grinding disc elastic teeth 5 arranged around the circumference of the grinding wheel base 2. The consolidation auxiliary component 4 is a screw. "Limiting contact" means that an annular groove is provided on one end face of the grinding wheel base 2. The mounting section 11 of the elastic grinding teeth 1 and the resin grinding disc elastic tooth mounting section 51 of the resin grinding disc elastic teeth 5 are both adapted and fixed in the annular groove. The annular groove cooperates with the outer peripheral surface of the pressure plate 3, which is conducive to fastening the grinding ring formed by the multiple elastic grinding teeth 1 and the multiple resin grinding disc elastic teeth 5 around the grinding wheel base 2 on one end face.

[0075] The beneficial effects of this embodiment are as follows: Airflow slits are formed between the elastic transition sections of adjacent elastic grinding teeth and between the working sections, which facilitates airflow convection and heat dissipation within and outside the grinding ring during dry grinding, ensuring stable grinding wheel performance. This also facilitates displacement and yaw of the elastic grinding teeth under stress. Multiple grinding strips, which generate circumferential elastic displacement under grinding stress, are radially spaced within the working section. This helps the grinding strips to shift or yaw under grinding stress, preventing them from being squeezed by external impacts, alleviating the rigidity of the grinding strips, and reducing or even eliminating the impact of the grinding wheel on brittle surfaces. The diamond grinding layer is prone to edge bursting during grinding of resin-bonded materials. By fixing the diamond grinding layer to the front of the foil substrate grinding wheel in the direction of rotation, the foil substrate can form a backing for the diamond grinding layer, providing support for the diamond particles during grinding, optimizing the holding effect of diamond particles, reducing the occurrence of diamond particles falling over, shifting, rotating, and falling off, improving the utilization rate of diamond, and allowing the selection of diamonds with higher strength than those used in existing resin-bonded grinding wheels, thereby improving the sharpness of the grinding wheel in dry grinding or heavy-duty grinding and the grinding wheel life. This can significantly reduce the overall diamond concentration required for the grinding wheel and reduce costs.

[0076] The present invention has the following advantages: 1. By leveraging the combined effects of the structural elasticity and material elasticity of the grinding teeth, the rigidity of the grinding bar is mitigated, thereby reducing or eliminating the chipping phenomenon that easily occurs when the grinding wheel grinds brittle materials. 2. By electroplating diamond particles onto a foil substrate, the diamond particle coating process is simplified, and the holding force on the diamond particles is strengthened, improving the utilization rate of diamond. This can significantly reduce the overall diamond concentration required for the grinding wheel, optimize the mechanical relationship of the grinding process, and reduce diamond costs. 3. The use of a parallel and spaced grinding strip structure is beneficial to the force displacement or yaw of the grinding strip, reducing the edge breakage phenomenon during grinding. 4. The composite bonding mode of the diamond grinding layer is beneficial to improving manufacturing efficiency and reducing material costs; 5. The single-layer diamond particle setting helps to achieve the effect of grinding, cooling and chip removal of the grinding wheel at the same time; 6. Using thermoplastic materials with a certain degree of elasticity as binders and structural components is beneficial to leveraging the elasticity of thermoplastic materials and reducing material costs; 7. The airflow convection and heat sink conduction cooling structure is beneficial for heat dissipation during dry grinding, ensuring the stable performance of the grinding wheel; 8. The design of this invention can replace the resin diamond grinding wheel for dry grinding of ceramics, and has a higher cost performance.

[0077] It should be noted that the mechanism of the grinding wheel of the present invention can also be applied under conditions where wet grinding is permitted.

[0078] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0079] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0080] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0081] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0082] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0083] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A dry grinding composite structure grinding wheel, characterized in that, include: Multiple elastic grinding teeth (1) and a grinding wheel base (2), wherein the multiple elastic grinding teeth (1) are arranged around the grinding wheel base (2) in a circumferential direction to form a grinding ring; The elastic grinding teeth (1) include: a mounting section (11), an elastic transition section (12), and a working section (13). The mounting section (11) and the working section (13) are fixedly disposed at both ends of the elastic transition section (12) in a one-to-one correspondence. The mounting section (11) is fixedly disposed on one end face of the grinding wheel base (2). An air flow slit is formed between the elastic transition section (12) and the working section (13) of two adjacent elastic grinding teeth (1). Multiple grinding strips (14) that generate circumferential elastic displacement when subjected to grinding force are arranged radially inside the working section (13). The grinding strips (14) include a foil substrate (141) that undergoes non-plastic deformation when subjected to grinding force and a diamond grinding layer (142). The foil substrate (141) is fixedly connected to the working section (13). The diamond grinding layer (142) is fixedly bonded to the side wall in front of the foil substrate (141) in the direction of grinding wheel rotation.

2. The dry grinding composite structure grinding wheel according to claim 1, characterized in that, The installation section (11), the elastic transition section (12), and the working section (13) are all made of elastic thermoplastic material and are integrally molded by injection molding process.

3. The dry grinding composite structure grinding wheel according to claim 1, characterized in that, The two radially adjacent grinding strips (14) are filled with thermoplastic material, and the distance between the two radially adjacent grinding strips (14) is greater than 0 and less than 2 mm.

4. The dry grinding composite structure grinding wheel according to claim 1, characterized in that, The grinding bar (14) is set at an angle or perpendicular to the grinding wheel reference surface.

5. The dry grinding composite structure grinding wheel according to claim 1, characterized in that, The diamond grinding layer (142) includes a binder (1421) and a plurality of diamond particles (1422). The diamond particles (1422) are fixed to one side wall of the foil substrate (141) along the circumferential direction of the grinding wheel matrix (2) by the binder (1421). The plurality of diamond particles (1422) are arranged in a single layer within the binder (1421).

6. The dry grinding composite structure grinding wheel according to claim 5, characterized in that, The width of the grinding bar (14) along the radial direction of the grinding wheel base (2) is greater than three times the particle size of the diamond particles (1422).

7. The dry grinding composite structure grinding wheel according to claim 5, characterized in that, The thickness of the binder (1421) along the circumferential direction of the grinding wheel matrix (2) is 15%-110% of the diameter of the diamond particle (1422), or the thickness of the binder (1421) along the circumferential direction of the grinding wheel matrix (2) is greater than or equal to the diameter of the diamond particle (1422) and less than twice the diameter of the diamond particle (1422).

8. The dry grinding composite structure grinding wheel according to claim 5, characterized in that, The binder (1421) is a single-material binder or a composite-material binder.

9. The dry grinding composite structure grinding wheel according to claim 1, characterized in that, The foil substrate (141) is made of spring steel.

10. The dry grinding composite structure grinding wheel according to claim 1, characterized in that, The elastic transition section (12) is provided with elastic grooves (121) on both sides of the grinding wheel base (2) along the circumference. The elastic grooves (121) penetrate the elastic transition section (12) radially along the grinding wheel base (2).

11. The dry grinding composite structure grinding wheel according to claim 1, characterized in that, The working section (13) is provided with multiple convection heat dissipation grooves (131) on both sides of the grinding wheel base (2) along the circumference. The multiple convection heat dissipation grooves (131) on one side of the working section (13) along the circumference of the grinding wheel base (2) are spaced apart along the axial direction of the grinding wheel base (2). The convection heat dissipation grooves (131) penetrate the working section (13) radially along the grinding wheel base (2).

12. The dry grinding composite structure grinding wheel according to claim 1, characterized in that, The grinding bar (14) also includes a heat sink (143), which is fixed on the sidewall of the foil substrate (141) away from the diamond grinding layer (142).

13. The dry grinding composite structure grinding wheel according to claim 1, characterized in that, A resin grinding disc elastic tooth (5) is provided between two adjacent elastic grinding teeth (1). Multiple elastic grinding teeth (1) and multiple resin grinding disc elastic teeth (5) are arranged alternately along the circumference of the grinding wheel base (2) and are all fixedly installed on one end face of the grinding wheel base (2).

14. The dry grinding composite structure grinding wheel according to claim 13, characterized in that, It also includes a pressure plate (3) and multiple consolidation auxiliary components (4). The pressure plate (3) is an annular plate structure. The pressure plate (3) is fixedly installed on one end face of the grinding wheel base (2) through the consolidation auxiliary components (4). The outer peripheral surface of the pressure plate (3) is in limiting contact with the elastic grinding teeth (1) and the elastic teeth (5) of the resin grinding disc.

Images