A high-rotational speed cup-shaped grinding wheel includes an annular base, several blades and a flow splitting structure. The blades are fixed on a side of the base at an interval in a circumferential direction to form a blade ring. The side of the blade ring away from the base forms an annular working surface, and two adjacent blades are spaced apart from each other to form a water passage channel for delivering cooling water to the working surface. The flow splitting structure is fixed on the blade ring and splits the cooling water into two branches, where a first branch delivers the cooling water to an outer area of the working surface, and a second branch delivers the cooling water to an inner area of the working surface, and then delivers the cooling water from an inner area of the working surface to an outer side area thereof.

An optical element processing tool for grinding or polishing an optical element includes: a base plate including a fixing region having a predetermined curvature; and a plurality of grindstones each formed in a columnar body having a same initial height, one end surface of the columnar body having an initial shape molded into a first spherical shape conforming to a processing target spherical shape of the optical element, and the other end surface of the columnar body being fixed to the fixing region of the base plate. A grindstone deviant from a condition among the plurality of grindstones, which is the grindstone not meeting a condition determined by a processing tool diameter of the processing tool, includes an outer end portion cut out at least in parallel to a center axis of the base plate so as to meet the condition.

An optical element processing tool for grinding or polishing an optical element includes: a base plate including a fixing region having a predetermined curvature; and a plurality of grindstones each formed in a columnar body having a same initial height, one end surface of the columnar body having an initial shape molded into a first spherical shape conforming to a processing target spherical shape of the optical element, and the other end surface of the columnar body being fixed to the fixing region of the base plate. A grindstone deviant from a condition among the plurality of grindstones, which is the grindstone not meeting a condition determined by a processing tool diameter of the processing tool, includes an outer end portion cut out at least in parallel to a center axis of the base plate so as to meet the condition.

A damped abrasive cutter having a machine attaching end; an abrasive surface comprising abrasive particles disposed in a binder; a central damping body connecting the machine attaching end to the abrasive surface. The central damping body formed from a synthetic polymer having a Storage Modulus from 1000 MPa to 2500 MPa and a Loss Factor from 0.025 to 0.10.

A damped abrasive cutter having a machine attaching end; an abrasive surface comprising abrasive particles disposed in a binder; a central damping body connecting the machine attaching end to the abrasive surface. The central damping body formed from a synthetic polymer having a Storage Modulus from 1000 MPa to 2500 MPa and a Loss Factor from 0.025 to 0.10.

A grinding wheel includes an annular base and a plurality of abrasive members fixed to the lower surface of the base and arranged annularly. The base has a plurality of through holes for discharging a grinding water. The plural through holes radially extend from the inner side surface to the outer side surface of the base. The plural through holes are arranged at given intervals in the circumferential direction of the base so that the grinding water is scattered in different directions from the through holes.

A grinding wheel includes an annular base and a plurality of abrasive members fixed to the lower surface of the base and arranged annularly. The base has a plurality of through holes for discharging a grinding water. The plural through holes radially extend from the inner side surface to the outer side surface of the base. The plural through holes are arranged at given intervals in the circumferential direction of the base so that the grinding water is scattered in different directions from the through holes.

A double-disc straight groove cylindrical-component surface grinding disc, includes a first grinding disc and a second grinding disc, rotating relative to each other; the the first grinding disc's working face is planar; the second grinding disc's surface, opposite the first grinding disc, includes a set of radial straight grooves, with groove faces of the straight grooves are the working face of the second grinding disc; the cross-sectional outline of the working face of the second grinding disc is arcuate or V-shaped or is a V-shape having an arc; during grinding, a workpiece spins inside the straight grooves, while under the effect of an advancing apparatus, the workpiece slides in translational motion along the straight grooves. The described grinding disc device has high-volume production capabilities, and the shape accuracy and size consistency of the cylindrical roller's cylindrical surface and the efficiency in machining are improved, and machining cost is reduced.

The invention concerns a tool for machining of materials, specifically a grinding tool, which has a substantially rotationally symmetrical shape with respect to a rotation axis (R), the tool comprising an outer shell centred about the rotation axis and defining an internal space therein, wherein at least a part of a surface of the outer shell is provided with an abrasive coating or component, wherein the outer shell encases an internal skeleton structure in the internal space, the internal skeleton being integral with the outer shell and defining void volumes in the internal space thereby establishing material and void volumes of the internal space, and wherein the material to void ratio M/V is distributed substantially identically along each radius (r) centred around the rotation axis (R) and its corresponding symmetrical radius (r′). The invention also concerns a method for producing such tool.

A rough grinding wheel for processing material surfaces includes a wheel-shaped base body having a central recess penetrated by an axis of rotation for direct or indirect connection to a drive shaft of a tool. The rough grinding wheel has a stabilizing core stabilizing the rough grinding wheel. The stabilizing core is associated with at least one abrasive layer circumferentially adjacent to the central recess. The stabilizing core has a higher strength than the at least one abrasive layer.