Patent ID: 9718112
Date: 2017-08-01
CPC Classifications: B21D,B23B,F16D

Claim:
1. A method for manufacturing a drive plate of an electromagnetic fan clutch, comprising: forming a drive plate body, which specifically comprises steps of forming a steel plate into a circular blank steel plate by blanking with a punching machine, and machining a through hole for fixing in a center of the blank steel plate by blanking with a punching machine; installing a spinning upper mould on an upper connection seat of a spinning machine tool; placing the blank steel plate in a spinning lower mould, which is connected to a lower connection seat of the spinning machine tool, thereby connecting the blank steel plate to a lower connection seat of the spinning machine tool, so that a smooth end surface of the spinning upper mould closely contacts with a central position of the blank steel plate, and clamping the blank steel plate to rotate by the spinning lower mould and the spinning upper mould; at an outer side of a circumferential surface of the blank steel plate, feeding a pressing surface of a first rotation wheel by a certain thickness towards a direction of a lower end surface from a direction of an upper end surface of the blank steel plate, and feeding the rotation wheel toward the spinning upper mould along a radial direction of the blank steel plate to form an inner wall of the drive plate; unloading the blank steel plate from the spinning machine tool, and bending a circumferential edge of the blank steel plate towards the direction of the upper end surface by an oil press to be provided with a radian, so that the edge of the blank steel plate forms a bend; removing the spinning upper mould and the spinning lower mould from the upper and lower connection seats; installing a fixing mould, which comprises an upper mould and a lower mould, on the upper connection seat and the lower connection seat of the spinning machine tool, and firmly clamping and rotating the blank steel plate by a contact end of the upper mould and a boss of the lower mould; aligning an edge of a pressing surface of an extrusion bar with an edge of an annular groove formed by the contact end of the upper mould and the boss of the lower mould, feeding the pressing surface of the extrusion bar towards the boss along a radial direction, and forming a drive plate outer wall by spinning and bending; unloading the blank steel plate from the spinning machine tool, and expanding the through hole for fixing by blanking with a punching machine; extruding a shaft sleeve with a machined key slot in the through hole of the blank steel plate by the oil press to form a drive plate through hole, and annularly welding at a junction; forming air magnetic isolation through holes and connection ribs, which specifically comprises steps of unloading the blank steel plate from the oil press, and punching the air magnetic isolation through holes and the connection ribs on an end surface of the drive plate by the punching machine; unloading the blank steel plate from the punching machine, and turning circles of grooves in the end surface of the drive plate by a turning machine; removing burrs and scraps on the drive plate by machining; and processing the whole drive plate with galvanizing.