Double-disc straight groove cylindrical-component surface grinding disc

A double-disc straight groove cylindrical-component surface grinding disc, comprising a first grinding disc (11) and a second grinding disc (12);

• wherein:
• the second grinding disc (12) and the first grinding disc (11) rotates relative to each other, the second grinding disc (12) having a rotation, axis OO′ relative to the first grinding disc (11);
• a surface of the first grinding disc 11, opposite to the second grinding disc (12) is planar, which is a working surface (111) of the first grinding disc (11);
• and
• a plurality of radial straight grooves (121) are provided on a surface of the second grinding disc (12) opposite to the first grinding disc (11), the straight groove (121) having a groove surface as a working face (1211) of the second grinding disc (12), the working face (1211) of the second grinding disc (12) having a cross-section profile in an arc shape or a V shape or a V shape with an arc;
• during grinding process, a processing workpiece (9) is arranged in the straight, groove (121) along a groove extending direction, and meanwhile, an outer cylindrical surface of the processing workpiece (9) contacts with the working face (1211) of the second grinding disc (12);
• the straight groove (121) has a reference plane, a plane that passes through an axis l of the processing workpiece arranged in the straight groove, and is perpendicular to the working face (111) of the first grinding disc (11);
• there is an angle θ between a normal plane at a contacting point or a midpoint of a contacting arc between the processing workpiece (9) and the straight groove (121), and the reference plane of the straight groove (121), the angle θ ranging in 30˜60 °;
• one end of the straight groove (121) close to a center of the second grinding disc (12) is a propulsion port, and the other end of the straight groove (121) is a discharge outlet;
• an eccentric distance e exists between the reference plane of the straight groove (121) and the rotation axis OO′, and the value of e is larger than or equal to zero, and smaller than a distance from the rotation axis OO′ to the discharge outlet of the straight groove (121);
• when the value of the eccentric distance e is zero, the straight groove (121) is arranged in a radial arrangement;
• and the second grinding disc (12) has a central position with a mounting portion of the workpiece advancing, apparatus (2) provided thereon;
• under a condition of a grinding pressure and grinding lubrication, a friction coefficient between materials of the first grinding disc's working face (111) and materials of the processing workpiece is f1, a friction coefficient between materials of the second grinding disc's working face (1211) and materials, of the processing workpiece is f2, and f1>f2, so as to ensure the processing workpiece to achieve spinning in the grinding process.