A surface-textured diamond dressing roller and a design method thereof

Abstract

The application provides a surface-textured diamond dressing roller and a design method thereof, and belongs to the technical field of mechanical processing. The dressing roller comprises a base body and a textured working layer, and the textured working layer comprises a plurality of abrasive grain rows arranged along a circumferential closed loop line and a plurality of abrasive grain columns arranged along a spiral line. The design method of the dressing roller comprises the following steps: calculating the critical load of abrasive grain fracture of a grinding wheel based on Hertz theory and linear elastic fracture mechanics; calculating the critical load of binder fracture of the grinding wheel based on the maximum principal stress criterion; establishing a quantitative relationship model of surface-textured parameters and dressing force by taking the two as constraint conditions; and solving the optimal surface-textured parameter combination satisfying the target dressing force by numerical iteration. The application significantly reduces the dressing force, improves the chip removal and heat dissipation conditions, prolongs the service life of the dressing roller, and improves the dressing quality of the grinding wheel through the ordered textured structure.

Description

Technical Field

[0001] This invention belongs to the field of machining technology, specifically relating to a surface-textured diamond dressing roller and its design method. Background Technology

[0002] Diamond dressing rollers are key tools in precision grinding, using rolling motion with the grinding wheel to shape its profile and sharpen abrasive grains. With increasing demands for machining accuracy and efficiency, higher requirements are being placed on the dressing performance, service life, and stability of dressing rollers.

[0003] In existing technologies, diamond dressing rollers typically have a continuous diamond working layer on the outer periphery of the base material, with randomly and densely distributed diamond abrasive grains. This structure easily leads to localized heat accumulation in the dressing area during the dressing process, poor chip removal, and a large dressing force. This not only easily causes the diamond abrasive grains to break and fall off, affecting the roller's lifespan, but also easily leads to uneven dressing of the grinding wheel, affecting the surface quality of the workpiece being ground.

[0004] Therefore, existing continuous structure dressing rollers can hardly meet the application requirements of long-term, efficient and stable dressing. It is necessary to provide a surface-textured diamond dressing roller and its design method to solve the above problems. Summary of the Invention

[0005] This invention provides a surface-textured diamond dressing roller and its design method, aiming to overcome the shortcomings of the prior art. By using a surface-textured working layer, the dressing force of the dressing roller is reduced, heat dissipation and chip removal are improved, service life is extended, and the surface quality of the workpiece being ground is improved.

[0006] To solve the above-mentioned technical problems, the present invention is implemented as follows: A surface-textured diamond dressing roller includes: Matrix; A texturing working layer is fixed to the surface of the substrate. The texturing working layer includes a plurality of dressing roller abrasive grains arranged in an orderly array on the surface of the substrate. The area where the texturing working layer is located is divided into multiple virtual grids by multiple virtual first reference lines and multiple virtual second reference lines. The dressing roller abrasive grains are located at the intersections of the virtual grids, wherein: The first reference line is a closed loop that surrounds the circumference of the substrate; The second reference line is a helix offset by a preset helix angle relative to the axis of the substrate; Multiple dressing roller abrasive grains on the same first baseline form a dressing roller abrasive grain row; multiple dressing roller abrasive grains on the same second baseline form a dressing roller abrasive grain column.

[0007] As a preferred improvement, the helix angle is 30°-60°.

[0008] As a preferred improvement, the multiple rows of dressing roller abrasive grains are arranged at equal intervals; the multiple columns of dressing roller abrasive grains are arranged at equal intervals; circumferential grooves are formed between adjacent rows of dressing roller abrasive grains; and spiral grooves are formed between adjacent columns of dressing roller abrasive grains. The circumferential grooves and the spiral grooves are spatially interconnected, forming a microchannel network for chip removal and coolant delivery.

[0009] As a preferred improvement, the abrasive grains of the dressing roller are diamond abrasive grains.

[0010] A method for designing surface texturing parameters for a surface-textured diamond dressing roller, as described above, includes the following steps: Step S1: Taking the contact pair of dressing roller abrasive grains and grinding wheel abrasive grains as the research object, a simplified model at the microscale is constructed. Based on Hertz theory, the interaction relationship between grinding wheel abrasive grains and dressing roller abrasive grains is described, and the critical load for the grinding wheel abrasive grains to fracture is calculated. Step S2: Taking the bonding agent of the grinding wheel as the research object, the bonding agent is simplified as an elastic beam element. It is assumed that the deformation of the bonding agent is within the linear elastic range and is approximately the normal approach distance between the dressing roller abrasive grain and the grinding wheel abrasive grain. The critical load at which the bonding agent fractures is calculated based on the maximum principal stress theory. Step S3: Using the critical load for abrasive grain fracture and the critical load for bond fracture as constraints, establish a quantitative relationship model between the surface texturing parameters of the dressing roller and the dressing force; set the target dressing force, and solve for the surface texturing parameters of the dressing roller based on the quantitative relationship model.

[0011] As a preferred improvement, the surface texturing parameters include: the vertical distance between two adjacent rows of dressing roller abrasive grains, the axial spacing between two adjacent rows of dressing roller abrasive grains, the circumferential spacing between two adjacent rows of dressing roller abrasive grains, the tangential spacing between two adjacent dressing roller abrasive grains in the same dressing roller abrasive grain row, the average grain size of the dressing roller abrasive grains, the number of rows, the number of columns, and the total number of dressing roller abrasive grains.

[0012] As a preferred improvement, in step S1, the critical load at which the abrasive grains of the grinding wheel fracture is determined by the following method: The grinding wheel abrasive grains and dressing roller abrasive grains are simplified as isotropic elastic spheres, and the radius of the contact circle region and the maximum contact stress are calculated based on Hertz theory. Based on linear elastic fracture mechanics, the critical load at which the grinding wheel abrasive grains fracture is determined by taking the equivalent stress strength factor reaching its equivalent fracture toughness as the critical condition.

[0013] As a preferred improvement, in step S2, the critical load at which the grinding wheel bond breaks is determined by the following method: The normal approach distance between the dressing roller abrasive grains and the grinding wheel abrasive grains is calculated based on Hertzian theory. The binder is simplified as an elastic beam element. It is assumed that the deformation of the binder is within the linear elastic range and is approximately the normal approach distance between the dressing roller abrasive grains and the grinding wheel abrasive grains. The stress of the binder is calculated based on Hooke's law. Based on the maximum principal stress theory, the critical load at which the bonding agent of the grinding wheel fractures is determined by taking the stress reaching the ultimate tensile strength as the critical condition. Considering the dynamic influence of the relative velocity between the dressing roller abrasive grains and the grinding wheel abrasive grains on the contact load, a correction factor is introduced to correct the critical load at which the bond breaks.

[0014] As a preferred improvement, in step S3, the quantified relationship model is constructed in the following manner: The effective number of collisions within the contact arc length between the dressing roller and the grinding wheel is calculated based on the abrasive grain spacing of the dressing roller and the abrasive grain spacing of the grinding wheel. The normal dressing force is expressed as the sum of the effective collision contact loads within the contact arc length between the dressing roller and the grinding wheel, and an external correlation formula between the normal dressing force and the surface texturing parameters is constructed. The inherent correlation between various surface texturing parameters is established based on the arrangement of the abrasive grains of the dressing roller; The combination of the external and internal correlations constitutes the quantitative relationship model.

[0015] As a preferred improvement, in step S3, the process of solving the surface texturing parameters is as follows: Using the critical loads of abrasive grain fracture and bonding agent fracture of grinding wheel as hard constraints, and a quantitative relational model as the forward solution equation set, the optimal combination of surface texturing parameters is solved through numerical iteration to make the calculated dressing force approximate the target dressing force.

[0016] The beneficial effects of this invention are as follows: (1) Reduce dressing force and improve stability: By setting a texture structure on the surface of the diamond working layer, the dressing process forms intermittent contact, and the texture layout is optimized by algorithm, which effectively reduces the normal force and tangential force, reduces heat accumulation, and improves the stability of the dressing process.

[0017] (2) Improve chip removal and heat dissipation: The grooves formed by the texture structure can serve as channels for chip removal and coolant, improving chip removal and heat dissipation conditions in the trimmed area.

[0018] (3) Extend tool life: The reduction of dressing force and the improvement of heat dissipation reduce the breakage and shedding of diamond abrasive grains. The surface reconstruction method can accurately assess wear and provide a basis for optimized design, thereby effectively extending the service life of the dressing roller.

[0019] (4) Improve dressing quality: Improved stability and uniformity of the dressing process helps to obtain a more consistent grinding wheel surface morphology, ultimately improving the grinding quality of the workpiece. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, wherein: Figure 1 This is a three-dimensional structural diagram of a surface-textured diamond dressing roller provided by the present invention; Figure 2 A planar schematic diagram representing the texturing working layer; Figure 3 The diagram shows a comparison of the dressing effect of the surface-textured diamond dressing roller provided in Example 1 and the dressing roller in the prior art on the grinding wheel; (a)-(c) show the wear of the abrasive grains on the textured dressing roller, and (d)-(f) show the wear of the abrasive grains on the ordinary dressing roller. Figure 4 This is a force-time curve of the surface-textured diamond dressing roller provided in Example 1; Figure 5 This is a comparison chart of the normal dressing force-dressing speed ratio curves between the surface-textured diamond dressing roller provided in Example 1 and the dressing roller in the prior art. Figure 6 This is a comparison chart showing the tangential dressing force-dressing speed ratio curves between the surface-textured diamond dressing roller provided in Example 1 and dressing rollers in the prior art. Detailed Implementation

[0021] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] like Figures 1-6As shown, this embodiment provides a surface-textured diamond dressing roller for dressing grinding wheels. The dressing roller includes a base 10 and a textured working layer 20 fixed to the surface of the base 10.

[0023] The substrate 10 is a rotating structure made of alloy steel or tungsten copper alloy to ensure dynamic stiffness under high-speed rotation.

[0024] The texturing working layer 20 includes a plurality of dressing roller abrasive grains 201 arranged in an orderly array on the surface of the substrate 10; the area where the texturing working layer 20 is located is divided into multiple virtual grids by multiple virtual first reference lines and multiple virtual second reference lines, and the dressing roller abrasive grains 201 are located at the intersections of the virtual grids, wherein: The first reference line is a closed loop that surrounds the circumference of the substrate; The second reference line is a helix offset from the axis of the base 10 by a preset helix angle, wherein the helix angle is 30°-60°; Multiple dressing roller abrasive grains on the same first reference line form a dressing roller abrasive grain row; multiple dressing roller abrasive grains on the same second reference line form a dressing roller abrasive grain column; the multiple dressing roller abrasive grain rows are arranged at equal intervals; the multiple dressing roller abrasive grain columns are arranged at equal intervals.

[0025] It should be noted that the "first reference line" and "second reference line" are both virtual concepts. There is no physical structure of the "first reference line" and "second reference line" on the surface of the substrate 10. The purpose of defining the "first reference line" and "second reference line" is to describe the arrangement of the dressing roller abrasive grains 201.

[0026] The dressing roller abrasive 201 is a diamond abrasive, which is fixed to the surface of the substrate 10 by a binder. The binder can be selected according to the actual working conditions, such as a resin binder (suitable for fine dressing), a metal binder (suitable for high-efficiency heavy-duty dressing), or a ceramic binder (suitable for high-heat-resistant dressing).

[0027] A circumferential groove is formed between two adjacent rows of abrasive grains on the full roller; a spiral groove is formed between two adjacent rows of abrasive grains on the dressing roller. The circumferential groove and the spiral groove are interconnected in space, forming a microchannel network for efficient chip removal and coolant delivery.

[0028] The orderly arrangement of the abrasive grains 201 of the dressing roller forms a textured structure on the surface of the substrate 10. The advantages of this textured structure are: (1) The abrasive grains of the dressing roller are evenly spaced. During the dressing process, they come into intermittent contact with the abrasive grains of the grinding wheel to avoid heat accumulation and periodic impact load caused by continuous rolling, thereby improving the stability of the dressing process and the service life of the dressing roller. (2) The circumferential grooves and spiral grooves serve as chip removal and cooling channels, improving chip removal and heat dissipation conditions in the trimmed area; (3) The extension direction of the abrasive grains of the dressing roller is not axial, but has a fixed phase difference, which makes the abrasive grains participating in cutting at the same time in the contact circle area when the dressing roller rotates sparsely distributed in space, rather than forming a dense cutting band. This oblique arrangement configuration changes the contact state between the dressing roller and the grinding wheel from line contact to discrete point group contact, thus physically realizing a low-damping, high-interruption impact dressing mode.

[0029] This embodiment also provides a method for designing surface texturing parameters for the above-mentioned surface-textured diamond dressing roller, including the following steps: Step S1: Taking the contact pair of dressing roller abrasive grains and grinding wheel abrasive grains as the research object, a simplified model at the microscale is constructed. Based on Hertz theory, the interaction relationship between the grinding wheel abrasive grains and the dressing roller abrasive grains is described, and the critical load for the grinding wheel abrasive grains to fracture is calculated.

[0030] Specifically, in step S1, the critical load at which the grinding wheel abrasive grains fracture is determined in the following way: The grinding wheel abrasive grains and dressing roller abrasive grains are simplified as isotropic elastic spheres, and the radius of the contact circle region and the maximum contact stress are calculated based on Hertz theory.

[0031] The radius of the contact circle between the abrasive grains of the grinding wheel and the abrasive grains of the dressing roller a Represented as: ; In the formula, This represents the total load acting on the abrasive grains of the grinding wheel; Represents the equivalent elastic modulus. Represents the equivalent contact radius, where: ; ; In the formula, , These represent the elastic modulus of the dressing roller abrasive and the grinding wheel abrasive, respectively. , These represent the diameters of the dressing roller abrasive grains and the grinding wheel abrasive grains, respectively. , These represent the Poisson's ratios for dressing roller abrasive grains and grinding wheel abrasive grains, respectively. The total load on the contact circular area PMaximum contact pressure generated by compression It can be represented as: .

[0032] In Hertzian contact, the pressure distribution in the contact area is semi-ellipsoidal, and the surface pressure generates a complex triaxial stress state inside the abrasive grains, with the maximum tensile stress inside being... It is the main cause of material fracture. Maximum tensile stress. It appears near the edge of the circular contact area, and its size is related to the maximum contact pressure. The relationship is represented as: .

[0033] Based on linear elastic fracture mechanics, the critical load at which the grinding wheel abrasive grains fracture is determined by taking the equivalent stress strength factor reaching its equivalent fracture toughness as the critical condition.

[0034] According to the theory of linear elastic fracture mechanics, the critical state for the fracture of grinding wheel abrasive grains is the equivalent stress intensity factor. Achieving the equivalent fracture toughness of the material ,Right now: ; In the formula, This indicates a dimensionless factor related to abrasive defects; This indicates the maximum defect size inside the abrasive grain.

[0035] By combining the above formulas, the critical load at which the grinding wheel abrasive grains fracture can be derived. : .

[0036] Step S2: Taking the bonding agent of the grinding wheel as the research object, the bonding agent is simplified as an elastic beam element. It is assumed that the deformation of the bonding agent is within the linear elastic range and is approximately the normal approach distance between the dressing roller abrasive grain and the grinding wheel abrasive grain. The critical load at which the bonding agent fractures is calculated based on the maximum principal stress theory.

[0037] Specifically, in step S2, the critical load at which the grinding wheel bond fractures is determined in the following way: The normal approach distance between the dressing roller abrasive grains and the grinding wheel abrasive grains is calculated based on Hertzian theory.

[0038] During the mutual compression of abrasive grains, in addition to the fracture of the abrasive grains themselves, the bonding agent fixing the abrasive grains to the grinding wheel matrix is ​​also prone to fracture. Based on Hertzian theory, the normal approach distance between abrasive grains... The approach velocity can be determined based on the normal direction between the abrasive grains. To confirm: ; In the formula, m Indicates equivalent mass. , This indicates the quality of a single abrasive grain from a dressing roller. , This indicates the density of the abrasive grains on the dressing roller; Indicates the radius of the abrasive grains on the dressing roller; This indicates the mass of a single abrasive grain on the grinding wheel. , This indicates the density of the abrasive grains in the grinding wheel; This indicates the radius of the abrasive grains on the grinding wheel.

[0039] The binder is simplified as an elastic beam element. It is assumed that the deformation of the binder is within the linear elastic range and is approximately the normal approach distance between the dressing roller abrasive grains and the grinding wheel abrasive grains. The stress of the binder is calculated based on Hooke's law. The binder in the grinding wheel serves to connect the abrasive grains and the grinding wheel matrix. When the abrasive grains are subjected to impact loads, the load is transferred to the binder below through the abrasive grains. To simplify the calculation process, the following assumptions are made: (1) The binder is simplified as a cylindrical elastic beam element; (2) The deformation of the binder... Approximate normal approach distance between abrasive grains (3) The deformation of the binder is within the linear elastic range.

[0040] Based on the above assumptions, Hooke's Law yields: ; In the formula, Indicates the stress of the binder; Indicates the elastic modulus of the binder; This indicates the length of the bond cut off by the abrasive grains of the grinding wheel.

[0041] Based on the maximum principal stress theory, the critical load at which the bonding agent of the grinding wheel fractures is determined by taking the stress reaching the ultimate tensile strength as the critical condition.

[0042] Based on the maximum principal stress theory, the condition for binder fracture is: ; In the formula, Indicates the ultimate tensile strength of the binder; Indicates the ultimate compressive strength of the binder; This represents the safety factor.

[0043] According to Hertzian contact theory, the critical load for binder fracture is... Represented as: ; Combining the above formulas, we obtain the critical load for bond fracture. : .

[0044] Considering the relative velocity between abrasive grains A correction factor is introduced to address the dynamic effects of contact loads. For critical load Make corrections, the corrected critical load Represented as: ; In the formula, , , These represent the dressing speeds of the roller abrasive and the grinding wheel abrasive, respectively. This indicates the angle between the collision trajectory and the normal to the grinding wheel surface; Indicates the normal spacing between the abrasive grains of the grinding wheel. , Indicates the average particle size of the grinding wheel abrasive. Abrasive grain volume concentration in grinding wheels.

[0045] Step S3: Using the critical load for abrasive grain fracture and the critical load for bond fracture as constraints, establish a quantitative relationship model between the surface texturing parameters and the dressing force of the dressing roller; set the target dressing force, and solve for the surface texturing parameters based on the quantitative relationship model.

[0046] Specifically, in step S3, the quantified relationship model is constructed in the following manner: The effective number of collisions within the contact arc length between the dressing roller and the grinding wheel is calculated based on the abrasive grain spacing of the dressing roller and the abrasive grain spacing of the grinding wheel. The normal dressing force is expressed as the sum of the effective collision contact loads within the contact arc length between the dressing roller and the grinding wheel, and an external correlation formula between the normal dressing force and the surface texturing parameters is constructed. The inherent correlation between various surface texturing parameters is established based on the arrangement of the abrasive grains of the dressing roller; The combination of the external and internal correlations constitutes the quantitative relationship model.

[0047] The surface texturing parameters include: the vertical distance between two adjacent rows of abrasive grains on the dressing rollers. axial spacing between two adjacent rows of abrasive grains on the dressing rollers Circumferential spacing between two adjacent rows of abrasive grains on the dressing rollers Tangential spacing between two adjacent dressing roller abrasive grains in the same dressing roller abrasive grain row Adjusting the average particle size of the roller abrasive grains , number of rows Column number And the total number of abrasive grains on the dressing rollers .

[0048] The normal dressing force is the sum of the effective contact loads of the abrasive grains between the dressing roller and the grinding wheel in the contact circle area, expressed as: ; In the formula, Indicates the normal adjustment force; Indicates the number of valid collisions within the contact circle area; Indicates the abrasive grain arrangement coefficient of the roller; This represents the single contact load between the dressing roller abrasive grain and the grinding wheel abrasive grain; where: ; ; In the formula, Indicates the effective collision coefficient; This indicates the total number of collisions between the roller abrasive grains and the grinding wheel abrasive grains within the contact circular region. Indicates tangential trimming force; Represents the equivalent friction coefficient, where It is related to the spacing of the abrasive grains, and is expressed as: ; In the formula, This represents the collision probability coefficient, indicating the probability of a collision occurring between abrasive particles. This indicates that the contact circle area is long. , Indicates the elastic deformation correction factor. Indicates radial feed rate; Indicates the normal spacing of the abrasive grains on the dressing roller; These represent the normal spacing between the abrasive grains of the grinding wheel; This indicates the need to adjust the outer diameter of the roller; This indicates the outer diameter of the grinding wheel.

[0049] From the geometric relationship of the abrasive grain arrangement on the dressing roller, we know that: ; ; ; ; ; In the formula, Indicates the helix angle; This indicates the width of the texturing working layer 20.

[0050] In the dressing process, the ideal wear process for grinding wheels is that the abrasive grains break down in time to expose new, sharp cutting edges, without reaching the strength to break down the bonding agent, thus ensuring that the abrasive grains can self-break down and renew themselves before falling off. To meet the above conditions, the following constraints should be satisfied: ; ; In the formula, This is a proportionality coefficient. To meet the fine and flat requirements of grinding wheels used in ultra-precision grinding, it is necessary to reduce the probability of abrasive grain breakage even if the bonding agent breaks. Take 0.40.

[0051] Substituting the material parameters of the grinding wheel, the dressing process parameters, and the target normal dressing force and the target tangential dressing force, the design parameters of the texturing layer on the surface of the dressing roller are solved: ; ; ; ; ; .

[0052] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be described in detail below with reference to specific embodiments. However, it should be understood that these embodiments are only for illustrating this invention and should not be construed as limiting this invention.

[0053] Example 1 In this embodiment, the abrasive grains of the dressing roller are diamond abrasive grains, the abrasive grains of the grinding wheel are alumina abrasive grains, the grinding wheel property parameters are shown in Table 1, the dressing roller property parameters are shown in Table 2, and the dressing process parameters are shown in Table 3.

[0054] Table 1 Grinding Wheel Property Parameters Table 2. Dressing Roller Property Parameters Table 3 Finishing process parameters The design parameters for the texturing layer on the surface of the trimming roller are obtained by solving the above formula, as shown in Table 4.

[0055] Table 4 Design parameters for the surface texturing layer of the dressing roller like Figure 3 The image shows a comparison of the dressing effect of a surface-textured diamond dressing roller and a dressing roller using existing technology on the grinding wheel. Please refer to the image for details. Figure 3 (a)- Figure 3 (c) The wear of the surface-textured diamond dressing roller provided by this invention mainly manifests as a gradual evolution from slight scratches to uniform wear. The abrasive grains maintain good integrity throughout, without obvious cracks or abrasive grain detachment, indicating that its failure mechanism is mainly progressive wear. Please refer to the following for details. Figure 3 (d)- Figure 3 (f) In the prior art, dressing rollers exhibit typical failure modes such as micro-pitting, crack propagation, and abrasive grain pull-out, demonstrating obvious fatigue damage and brittle fracture characteristics. The above comparison shows that the textured structure can effectively improve the dressing contact state, reduce local stress concentration, improve the diamond abrasive grain retention capacity, inhibit crack initiation and propagation, thereby slowing down the wear rate, extending the service life of the dresser, and maintaining high dressing accuracy and stability.

[0056] like Figures 4-6 As shown, Figure 4 The dressing force-time curve of the surface-textured diamond dressing roller provided in Example 1 is shown. Figure 5 This is a comparison chart showing the normal dressing force-dressing speed ratio curves of the surface-textured diamond dressing roller provided in Example 1 and the dressing roller in the prior art. Figure 6 This diagram shows a comparison of the tangential dressing force-dressing speed ratio curves between the surface-textured diamond dressing roller provided in Example 1 and dressing rollers in the prior art. Grinding force significantly affects workpiece surface integrity, grinding wheel wear, and machining system stability, and is a key indicator for evaluating grinding wheel performance. Specifically, normal grinding force dominates workpiece shape error, while tangential grinding force directly participates in the material removal process and has a significant impact on grinding wheel life. Figure 5 It can be seen that the normal force generated by the grinding wheel after dressing using the method of this invention is significantly lower than that after dressing using the traditional dressing method. Furthermore, the normal grinding force shows a decreasing trend with the increase of the dressing feed depth and dressing speed ratio. Figure 6 It can be seen that the tangential grinding force generated by the grinding wheel during grinding is also lower after dressing using the dressing method of the present invention. Similarly, the tangential grinding force also shows a decreasing trend as the dressing feed depth and dressing speed ratio increase.

[0057] The embodiments of the present invention have been described above with reference to the accompanying drawings. However, the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other modifications under the guidance of the present invention without departing from the spirit of the present invention, and all of these modifications are within the protection scope of the present invention.

Claims

1. A surface-textured diamond dressing roller, characterized in that, include: Matrix; A texturing working layer is fixed to the surface of the substrate. The texturing working layer includes a plurality of dressing roller abrasive grains arranged in an orderly array on the surface of the substrate. The area where the texturing working layer is located is divided into multiple virtual grids by multiple virtual first reference lines and multiple virtual second reference lines. The dressing roller abrasive grains are located at the intersections of the virtual grids, wherein: The first reference line is a closed loop that surrounds the circumference of the substrate; The second reference line is a helix offset by a preset helix angle relative to the axis of the substrate; Multiple dressing roller abrasive grains on the same first baseline form a dressing roller abrasive grain row; multiple dressing roller abrasive grains on the same second baseline form a dressing roller abrasive grain column.

2. The surface-textured diamond dressing roller according to claim 1, characterized in that, The helix angle is 30°-60°.

3. The surface-textured diamond dressing roller according to claim 1, characterized in that, Multiple rows of dressing roller abrasive grains are arranged at equal intervals; multiple columns of dressing roller abrasive grains are arranged at equal intervals; circumferential grooves are formed between adjacent rows of dressing roller abrasive grains; and spiral grooves are formed between adjacent columns of dressing roller abrasive grains. The circumferential grooves and the spiral grooves are spatially interconnected, forming a microchannel network for chip removal and coolant delivery.

4. The surface-textured diamond dressing roller according to claim 1, characterized in that, The abrasive grains of the dressing roller are diamond abrasive grains.

5. A design method for a surface-textured diamond dressing roller as described in any one of claims 1-4, characterized in that, Includes the following steps: Step S1: Taking the contact pair of dressing roller abrasive grains and grinding wheel abrasive grains as the research object, a simplified model at the microscale is constructed. Based on Hertz theory, the interaction relationship between grinding wheel abrasive grains and dressing roller abrasive grains is described, and the critical load for the grinding wheel abrasive grains to fracture is calculated. Step S2: Taking the bonding agent of the grinding wheel as the research object, the bonding agent is simplified as an elastic beam element. It is assumed that the deformation of the bonding agent is within the linear elastic range and is approximately the normal approach distance between the dressing roller abrasive grain and the grinding wheel abrasive grain. The critical load at which the bonding agent fractures is calculated based on the maximum principal stress theory. Step S3: Using the critical load for abrasive grain fracture and the critical load for bond fracture as constraints, establish a quantitative relationship model between the surface texturing parameters of the dressing roller and the dressing force. A target dressing force is set, and the surface texturing parameters of the dressing roller are obtained by solving based on the quantitative relationship model.

6. The design method according to claim 5, characterized in that, The surface texturing parameters include: the vertical distance between two adjacent rows of dressing roller abrasive grains, the axial spacing between two adjacent rows of dressing roller abrasive grains, the circumferential spacing between two adjacent rows of dressing roller abrasive grains, the tangential spacing between two adjacent dressing roller abrasive grains in the same dressing roller abrasive grain row, the average grain size of the dressing roller abrasive grains, the number of rows, the number of columns, and the total number of dressing roller abrasive grains.

7. The design method according to claim 5, characterized in that, In step S1, the critical load at which the abrasive grains of the grinding wheel fracture is determined by the following method: The grinding wheel abrasive grains and dressing roller abrasive grains are simplified as isotropic elastic spheres, and the radius of the contact circle region and the maximum contact stress are calculated based on Hertz theory. Based on linear elastic fracture mechanics, the critical load at which the grinding wheel abrasive grains fracture is determined by taking the equivalent stress strength factor reaching its equivalent fracture toughness as the critical condition.

8. The design method according to claim 5, characterized in that, In step S2, the critical load at which the grinding wheel bond fractures is determined by the following method: The normal approach distance between the dressing roller abrasive grains and the grinding wheel abrasive grains is calculated based on Hertzian theory. The binder is simplified as an elastic beam element. It is assumed that the deformation of the binder is within the linear elastic range and is approximately the normal approach distance between the dressing roller abrasive grain and the grinding wheel abrasive grain. The stress of the binder is calculated based on Hooke's law. Based on the maximum principal stress theory, the critical load at which the bonding agent of the grinding wheel fractures is determined by taking the stress reaching the ultimate tensile strength as the critical condition. Considering the dynamic influence of the relative velocity between the dressing roller abrasive grains and the grinding wheel abrasive grains on the contact load, a correction factor is introduced to correct the critical load at which the bond breaks.

9. The design method according to claim 5, characterized in that, In step S3, the quantified relationship model is constructed in the following manner: The effective number of collisions within the contact arc length between the dressing roller and the grinding wheel is calculated based on the abrasive grain spacing of the dressing roller and the abrasive grain spacing of the grinding wheel. The normal dressing force is expressed as the sum of the effective collision contact loads within the contact arc length between the dressing roller and the grinding wheel, and an external correlation formula between the normal dressing force and the surface texturing parameters is constructed. The inherent correlation between various surface texturing parameters is established based on the arrangement of the abrasive grains of the dressing roller; The combination of the external and internal correlations constitutes the quantitative relationship model.

10. The design method according to claim 5, characterized in that, In step S3, the process of solving the surface texturing parameters is as follows: Using the critical loads of abrasive grain fracture and bonding agent fracture of grinding wheel as hard constraints, and a quantitative relational model as the forward solution equation set, the optimal combination of surface texturing parameters is solved through numerical iteration to make the calculated dressing force approximate the target dressing force.

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