Grinding wheel tool for microgroove processing and fabrication method thereof

Abstract

A grinding wheel tool for microgroove processing and a method for fabricating a microgroove, including a grinding wheel tool body. The grinding wheel tool body is formed by sequentially stacking a plurality of grinding wheel sheets along a thickness direction of each of the plurality of grinding wheel sheet, and the initial diameters of the individual grinding wheel sheets are the same. The outer edge circumference of each grinding wheel sheet is different due to notches, the grinding wheel sheet with a large outer edge circumference wears slowly; the grinding wheel sheet with small outer edge circumference wears fast. For the grinding process of microgrooves of the same depth, the processing end face of the grinding wheel tool body will eventually form a stable contour shape, and the outer edge circumference of each grinding wheel sheet can be adjusted by notches to form different contour shapes.

1 . A grinding wheel tool for microgroove processing, comprising:
 a grinding wheel tool body formed by sequentially stacking a plurality of grinding wheel sheets along a thickness direction of each of the plurality of grinding wheel sheet,   wherein each of the plurality of the grinding wheel sheets comprises an outside end face,   wherein the outside end faces of all the grinding wheel sheets form a processing end face of the grinding wheel tool body,   wherein the outside end face of each of the plurality of grinding wheel sheets defines therein notches,   wherein the notches on different grinding wheel sheets have different widths,   wherein different grinding wheel sheets have different outer edge circumferences,   wherein the smaller the widths of the notches are, the larger the outer edge circumference of the grinding wheel sheet is and the more slowly the outside end face of the grinding wheel sheet wears, and   wherein the larger the widths of the notches are, the smaller the outer edge circumference of the grinding wheel sheet is and the faster the outside end face of the grinding wheel sheet wears, thereby forming the processing end face with a contour shape being a predetermined shape.   
     
     
         2 . The grinding wheel tool for microgroove processing according to  claim 1 , wherein the number of the notches on each of the plurality of grinding wheel sheets is multiple, and wherein a plurality of the notches on each of the plurality of grinding wheel sheets are evenly arranged along a circumferential direction of the grinding wheel sheet. 
     
     
         3 . The grinding wheel tool for microgroove processing according to  claim 1 , wherein each notch includes a bottom face and two side faces integrally connected with two opposite side edges of the bottom face, and wherein an angle formed between the two side faces is 0° to 60°. 
     
     
         4 . The grinding wheel tool for microgroove processing according to  claim 3 , wherein a depth of the notch is 0.5 millimeter (mm) to 10 mm. 
     
     
         5 . The grinding wheel tool for microgroove processing according to  claim 1 , wherein each of the plurality of grinding wheel sheets comprises a superabrasive and a binder. 
     
     
         6 . The grinding wheel tool for microgroove processing according to  claim 5 , wherein the superabrasive has a particle size of 0.1 micrometer (μm) to 50 μm. 
     
     
         7 . The grinding wheel tool for microgroove processing according to  claim 5 , wherein the superabrasive comprises one or more of diamond, cubic boron nitride, and silicon carbide, and wherein the binder comprises one or more of a metal binder, a resin binder, and a ceramic binder. 
     
     
         8 . The grinding wheel tool for microgroove processing according to  claim 1 , wherein a shape of each grinding wheel sheet is a circular ring, wherein an outer diameter of the grinding wheel sheet is 50 mm to 200 mm, wherein an inner diameter of the grinding wheel sheet is 15 mm to 45 mm, and wherein a thickness of the grinding wheel sheet is 10 μm to 200 μm. 
     
     
         9 . The grinding wheel tool for microgroove processing according to  claim 1 , wherein the number of the grinding wheel sheets is at least three, and wherein the width of the notch gradually increases from the grinding wheel sheet located at an intermediate position toward the grinding wheel sheets located at two sides. 
     
     
         10 . The grinding wheel tool for microgroove processing according to  claim 1 , wherein two adjacent grinding wheel sheets are connected and fixed by adhering. 
     
     
         11 . The grinding wheel tool for microgroove processing according to  claim 1 , wherein the contour shape of the processing end face is V-shaped, U-shaped, inverted U-shaped, inverted V-shaped, or obliquely-shaped. 
     
     
         12 . A method for fabricating a microgroove using the grinding wheel tool for microgroove processing according to  claim 1 , comprising:
 A. defining notches of different widths on the outside end faces of the plurality of grinding wheel sheets;   B. assembling the grinding wheel sheets obtained in step A in a predetermined stacking order to obtain the grinding wheel tool body; and   C. grinding a workpiece by using the grinding wheel tool body obtained in step B,   wherein the notches on different grinding wheel sheets have different widths,   wherein different grinding wheel sheets have different outer edge circumferences,   wherein the smaller the widths of the notches are, the larger the outer edge circumference of the grinding wheel sheet is and the more slowly the outside end face of the grinding wheel sheet wears, and   wherein the larger the widths of the notches are, the smaller the outer edge circumference of the grinding wheel sheet is and the faster the outside end face of the grinding wheel sheet wears, thereby truing the contour shape of the processing end face of the grinding wheel tool body into the predetermined shape and processing the workpiece to form a microgroove with a longitudinal cross-sectional shape conforming to the contour shape of the processing end face.   
     
     
         13 . The method according to  claim 12 , wherein the number of the notches on each of the plurality of grinding wheel sheets is multiple, and wherein a plurality of the notches on each of the plurality of grinding wheel sheets are evenly arranged along a circumferential direction of the grinding wheel sheet. 
     
     
         14 . The method according to  claim 12 , wherein each notch includes a bottom face and two side faces integrally connected with two opposite side edges of the bottom face, and wherein an angle formed between the two side faces is 0° to 60°. 
     
     
         15 . The method according to  claim 14 , wherein a depth of the notch is 0.5 millimeter (mm) to 10 mm. 
     
     
         16 . The method according to  claim 12 , wherein each of the plurality of grinding wheel sheets comprises a superabrasive and a binder. 
     
     
         17 . The method according to  claim 16 , wherein the superabrasive has a particle size of 0.1 micrometer (μm) to 50 μm. 
     
     
         18 . The method according to  claim 16 , wherein the superabrasive comprises one or more of diamond, cubic boron nitride, and silicon carbide, and wherein the binder comprises one or more of a metal binder, a resin binder, and a ceramic binder. 
     
     
         19 . The method according to  claim 12 , wherein a shape of each grinding wheel sheet is a circular ring, wherein an outer diameter of the grinding wheel sheet is 50 mm to 200 mm, wherein an inner diameter of the grinding wheel sheet is 15 mm to 45 mm, and wherein a thickness of the grinding wheel sheet is 10 μm to 200 μm. 
     
     
         20 . The method according to  claim 12 , wherein the number of the grinding wheel sheets is at least three, and wherein the width of the notch gradually increases from the grinding wheel sheet located at an intermediate position toward the grinding wheel sheets located at two sides.