Design method of abrasive disc for highly wear-resistant workpieces

Abstract

The present invention discloses a method for designing an abrasive disc for highly wear-resistant workpieces, which relates to the field of precision machining of highly wear-resistant workpieces. It includes the steps of (1) determining the processing dimensional variations in the abrasive disc during the abrasive process, (2) dividing areas on the abrasive disc, (3) calculating the track density of points on the workpiece for each divided area of ​​the abrasive disc, (4) calculating the area of ​​each area proportionally based on the track density of the area to obtain an abrasive disc pattern, and (5) obtaining a patterned abrasive disc by machining or arranging a hot-pressed sintered block of unit area according to the abrasive disc pattern. The present invention has the ability to quickly obtain abrasive disc patterns based on the track density distribution during the abrasive process, thereby realizing the design of abrasive discs with complex shapes. This effectively improves the uniformity of abrasive disc wear during abrasive disc polishing, improves the surface accuracy of the workpiece, shortens the polishing time, and improves processing efficiency.

Description

[Technical Field]

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS This invention claims priority from a Chinese patent application, application number 202311374462.5, filed with the State Intellectual Property Office of the People's Republic of China on October 23, 2023, entitled "Method for designing an abrasive disc for highly wear-resistant workpieces," the disclosure of which is incorporated herein by reference in its entirety.

[0002] The present invention relates to the field of ultra-precision machining technology, and specifically to a method for designing an abrasive disc for a highly wear-resistant workpiece. [Background technology]

[0003] Materials such as silicon carbide (SiC), diamond, and gallium nitride (GaN) have excellent physical properties such as a wide forbidden band, high thermal conductivity, good thermal stability, and high saturated drift velocity, and are therefore widely used in fields such as high frequency, high temperature, radiation resistance, and photoelectron. These materials require extremely high surface quality for industrial applications, and their extremely high hardness and chemical inertness make them highly wear-resistant and difficult to process, limiting the range of industrial applications.

[0004] Polishing is an important tool in precision and ultra-precision machining, and is widely used in the processing of semiconductor substrates due to its excellent surface quality. When polishing the edge of a highly wear-resistant workpiece, wear on the abrasive disc is inevitable, resulting in a decrease in the workpiece's flatness. During processing, any error in the abrasive disc is transferred to the workpiece surface, adversely affecting the accuracy of the workpiece surface. If the flatness error exceeds the tolerance, the abrasive disc must be dressed, which not only shortens the abrasive disc's life but also reduces production efficiency. Summary of the Invention [Problem to be solved by the invention]

[0005] The object of the present invention is to provide a method for designing an abrasive disc for highly wear-resistant workpieces, which solves problems such as reduced machining efficiency of conventional highly wear-resistant workpieces, uneven wear of the abrasive disc, and increased variation in workpiece surface accuracy by calculating the area of ​​different regions based on the distribution of trajectory density on the abrasive disc. [Means for solving the problem]

[0006] In order to achieve the above object, the solution of the present invention is as follows.

[0007] The design method of the abrasive disc for highly wear-resistant workpieces is as follows: (1) Rotational speed of the polishing disc ω m , workpiece rotation speed ω w or the rotational speed of the sun gear ω s (1) determining the machining dimensional variables in the grinding process, including the radius dimension r of the workpiece, the radius dimension R of the grinding disc, and the eccentricity distance e; (2) dividing areas relative to the grinding disc; and (3) determining points P on the workpiece for each divided area of ​​the grinding disc. i (4) calculating the area of ​​different regions by proportional calculation based on the region's locus density to obtain an abrasive disc pattern; and (5) obtaining a patterned abrasive disc by machining or arranging a unit area of ​​hot-pressed sintered mass according to the abrasive disc pattern.

[0008] When the abrasive disc is divided into regions, the divided regions are concentric rings with the center point of the abrasive disc as the center, or rectangles with the same area arranged in an array.

[0009] When the abrasive disc is divided into regions, the divided regions are concentric rings with the center point of the abrasive disc as the center, or rectangles with the same area arranged in an array.

[0010] JPEG2025537050000002.jpg12170Calculate the base area as A b The area of ​​the maximum trajectory density is A bThe maximum trajectory density of all partitioned regions is ρ max Let the trajectory density of the partitioned area be ρ u Let's say.

[0011] The substrate of the machined abrasive disc is an active metal.

[0012] The hot-pressed sintered mass is obtained by hot-pressing and sintering active metal powder and abrasive grains.

[0013] The method for designing an abrasive disc for a highly wear-resistant workpiece of the present invention involves calculating the track density of different divided regions, proportionally calculating the area of ​​the different divided regions based on the track density in the regions, and obtaining an abrasive disc pattern. The abrasive disc pattern is then obtained by machining or arranging a unit area of ​​hot-pressed sintered blocks according to the abrasive disc pattern. The present invention provides the ability to quickly obtain abrasive disc patterns based on the track density in the edge grinding process, allowing for the design of abrasive discs with complex shapes. This allows for the rapid design and precise manufacturing of complex patterns. This effectively improves the uniformity of abrasive disc wear during edge grinding, improves the surface accuracy of the workpiece, shortens the grinding time, and improves processing efficiency. [Effects of the Invention]

[0014] The method of designing an abrasive disc for a highly wear-resistant workpiece according to the present invention has the following beneficial effects: 1. The present invention effectively solves the problem of uneven wear of the abrasive disc and realizes uniform wear of the processing area. 2. The present invention obtains the abrasive disc by machining, thereby reducing the difficulty and cost of manufacturing the abrasive disc. 3. The present invention effectively improves the machining efficiency and surface precision of highly wear-resistant workpieces. [Brief explanation of the drawings]

[0015] [Figure 1] 1 is a flowchart illustrating a process of a design method provided by an embodiment of the present invention. [Figure 2] 1 is a schematic diagram of a single-side polishing process according to Example 1 of the present invention. [Figure 3] FIG. 1 is a diagram of area divisions of an abrasive disc according to Example 1 of the present invention. [Figure 4] 1 is a diagram showing a pattern of a single-sided abrasive disc according to Example 1 of the present invention. [Figure 5] 10 is a schematic diagram of polishing of both end faces according to Example 2 of the present invention. FIG. [Figure 6] FIG. 10 is a diagram showing the pattern of a double-end abrasive disc according to Example 2 of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0016] In order to further explain the technical aspects of the present invention, the present invention will be described in detail below by giving specific examples.

[0017] The method for designing an abrasive disc for a highly wear-resistant workpiece of the present invention is as follows: (1) First, the rotation speed of the polishing disc ω m and the rotation speed of the workpiece ω w or the rotational speed of the sun gear ω s (1) determining the processing dimension variables in the grinding process, including the radius dimension r of the workpiece, the radius dimension R of the grinding disc, and the eccentricity distance e; (2) dividing areas on the grinding disc; and (3) determining points P on the workpiece for each divided area of ​​the grinding disc. i (4) calculating the area of ​​different regions based on the trajectory density in the region by proportional calculation to obtain an abrasive disc pattern; and (5) obtaining a patterned abrasive disc by machining or arranging a unit area of ​​hot-pressed sintered mass according to the abrasive disc pattern.

[0018] When regions are defined on the abrasive disc, the defined regions are concentric rings with the center point of the abrasive disc as the center, or rectangles arranged in an array with the same area.

[0019] JPEG2025537050000003.jpg14170 is calculated, and the base area is A b The area of ​​the maximum trajectory density is A b The maximum trajectory density of all partitioned regions is ρ max Let the trajectory density of the partitioned area be ρ u Let's say.

[0020] The machined substrate of the abrasive disc is an active metal.

[0021] The hot-pressed sintered ingot is obtained by hot-pressing and sintering active metal powder and abrasive grains. [Example]

[0022] The method for designing an abrasive disc for a highly wear-resistant workpiece includes the following steps.

[0023] Step 1: Determining the machining dimensional variables for single-sided grinding The machining dimension variation in the single-sided polishing process is the rotation speed ω of the workpiece. w is set to 60 rpm, and the rotation speed of the polishing disc ω m The rotation speed is set to 100 rpm, the workpiece radius r is set to 50 mm, the grinding disc radius R is set to 360 mm, and the eccentric distance e is set to 90 mm. A schematic diagram of the grinding process is shown in Figure 2.

[0024] Step 2: Marking an area against the surface of the abrasive disc As shown in FIG. 3, the abrasive disc was divided into concentric rings, and the difference between the inner and outer radii of each concentric ring was 10 mm.

[0025] Step 3: Calculate the track density of each partition area of ​​the abrasive disc The work surface is divided into grids with a pitch of 1 mm, and the formula Calculate the trajectory lengths of all grid points on the workpiece in the JPEG2025537050000004.jpg11170 area, and calculate (x i ,y i ) to point P i Let the coordinates be tp is the time step, and the trajectory density of each region is u Calculate.

[0026] Step 4: Calculate the area of ​​the different areas and obtain the abrasive disc pattern JPEG2025537050000005.jpg12170 is calculated, and A b The base area is 3550mm 2 is set to

[0027] Step 5. Obtain a patterned abrasive disc by machining as shown in Figure 4 The excess area in the different compartmentalized regions of the abrasive disc is machined away to provide a patterned abrasive disc. [Example]

[0028] The method for designing an abrasive disc for a highly wear-resistant workpiece includes the following steps.

[0029] Step 1: Determine the machining dimensional variables for double-face grinding In the machining dimension variation in the grinding of both end faces, the sun gear ω s The rotation speed of the abrasive disc ω is set to 10 rpm. m The rotation speed is 80 rpm, the workpiece radius r is 50 mm, the grinding disc radius R is 150 mm, and the eccentric distance e is 58 mm. A schematic diagram of both end face grinding is shown in Figure 5.

[0030] Step 2: Marking an area against the surface of the abrasive disc The abrasive disc is divided into concentric rings, and the difference between the inner and outer radii of each concentric ring is 20 mm.

[0031] Step 3: Calculate the track density of each partition area of ​​the abrasive disc The work surface is divided into grids with a pitch of 1 mm, and the formula Calculate the trajectory length of all grid points on the workpiece in JPEG2025537050000006.jpg10170, and calculate (x i ,yi ) to point P i Let the coordinates be t p is the time step, and the trajectory density of each region is u Calculate.

[0032] Step 4: Calculate the area of ​​the different areas and obtain the abrasive disc pattern JPEG2025537050000007.jpg12170Calculate the actual area of ​​the partitioned area of ​​the ring area, and A b The base area is 25000mm 2 is set to

[0033] Step 5: Obtain a patterned abrasive disc by machining as shown in Figure 6 The excess area in the different compartmentalized regions of the abrasive disc is machined away to provide a patterned abrasive disc.

[0034] The above examples and drawings do not limit the product forms and styles of the present invention, and any appropriate changes or modifications made by those skilled in the art should be considered as not departing from the patent scope of the present invention. [Industrial Applicability]

[0035] The present invention discloses a method for designing an abrasive disc for highly wear-resistant workpieces, which relates to the field of precision machining of highly wear-resistant workpieces. It includes the steps of (1) determining the processing dimensional variations in the abrasive disc during the abrasive process, (2) dividing areas on the abrasive disc, (3) calculating the track density of points on the workpiece for each divided area of ​​the abrasive disc, (4) calculating the area of ​​each area proportionally based on the track density of the area to obtain an abrasive disc pattern, and (5) obtaining a patterned abrasive disc by machining or arranging a hot-pressed sintered block of unit area according to the abrasive disc pattern. The present invention has the ability to quickly obtain abrasive disc patterns based on the track density distribution during the abrasive process, thereby realizing the design of abrasive discs with complex shapes. The method efficiently improves the uniformity of abrasive disc wear during abrasive disc polishing, improves the surface accuracy of the workpiece, shortens the polishing time, and improves processing efficiency, making it industrially applicable.

Claims

1. A method for designing an abrasive disc for a highly wear-resistant workpiece, comprising: (1) Rotational speed ω of the polishing disc ｍ , workpiece rotation speed ω ｗ or the rotational speed of the sun gear ω ｓ (1) determining the machining dimensional variables in the grinding process, including the radius dimension r of the workpiece, the radius dimension R of the grinding disc, and the eccentricity distance e; (2) dividing areas relative to the grinding disc; and (3) determining points P on the workpiece for each divided area of ​​the grinding disc. ｉ (3) calculating the track density of each region; (4) calculating the area of ​​each region proportionally based on the track density of each region to obtain an abrasive disc pattern; and (5) obtaining a patterned abrasive disc by machining or arranging a hot-pressed sintered block of unit area according to the abrasive disc pattern.

2. A method for designing an abrasive disc for highly wear-resistant workpieces, as described in claim 1, characterized in that an area is defined for the abrasive disc, and the defined area is either a concentric ring with the center point of the abrasive disc as the center of a circle, or an array of rectangles with the same area.

3. Calculate the base area as A ｂ The area of ​​the region with the maximum trajectory density is A ｂ The maximum trajectory density of all partitioned regions is ρ ｍａｘ Let the trajectory density of the partitioned area be ρ ｕ 2. A method for designing an abrasive disc for a highly wear-resistant workpiece according to claim 1.

4. The surface of the workpiece is divided into grids with a pitch of 1 mm, and the formula Calculate the trajectory lengths of all grid points on the workpiece in the region (x ｉ , y ｉ ) at point P ｉ Let the coordinates of t ｐ is the time step, and the trajectory density of each region is ｕ 4. The method for designing an abrasive disc for a highly wear-resistant workpiece according to claim 3, further comprising the steps of:

5. 2. The method for designing an abrasive disc for a highly wear-resistant workpiece according to claim 1, wherein the substrate of the abrasive disc obtained by said machining is an active metal.

6. 2. The method for designing an abrasive disc for a highly wear-resistant workpiece according to claim 1, wherein the hot-pressed sintered mass is obtained by hot-pressing and sintering an active metal powder and abrasive grains.

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