How miniature bearing production

That process system and the relationship between the workpiece movement, in centerless grinding, the movement of the workpiece depends on the movement of the wheel. This view has significant limitations, its limitations is that studies the motion relation between roller and workpiece in isolation, and ignores the role of the grinding wheel plate. Centerless grinding process system by the grinding wheel parts, wheel parts, components and artifacts. In the process of grinding, the workpiece is not only bear the force of wheel, but also by the grinding wheel grinding force and plate bearing force, the action of friction. Therefore, the analysis of the workpiece movement characteristics, should be based on the entire process system. Strictly speaking, the movement condition of the work pieces by the guide wheel, grinding wheel and the plate joint control, control of the wheel. In order to further study in later sections of artifacts movement characteristics, it is necessary to first roller grinding wheel and the plate is in the state in the process of grinding the following decomposition type 1. The state of the wheel in the grinding, idler pulley are likely to experience the following 3 kinds of state: ( 1) Driving conditions. Wheel drive the state of the workpiece movement called the idler pulley drive state. The movement of the workpiece can be decomposed into two parts: around its own axis of rotation and movement along the grinding wheel axis. Both rotating and moving in the driving state, guide wheel linear velocity is always higher than the linear velocity of workpiece. ( 2) Braking state. Wheel braking state is to guide the workpiece movement to stop state. In braking state, the rotation of the work piece linear velocity is always higher than the corresponding points of wheel speed, workpiece have the possibility of driving wheel, and the idler pulley in turn prevent the workpiece rotation. ( 3) Light condition. In the idle state, idler pulley drive, neither don't stop the rotation of the workpiece. In the above three kinds of state, the workpiece moving wheel drive state exists in the whole grinding process. 2. In the state of the grinding wheel in grinding, for the rotation of the workpiece, the grinding wheel in driving state, the driving force is the tangential grinding force component; For the movement of the workpiece, the grinding wheel in the braking state, the braking force is axial grinding force component. 205