A belt-finishing device including a frame. A pressing arm is configured to pivotally mount on the frame. A pressing element, which is used to press a finishing belt against a workpiece surface to be treated, is arranged on the pressing arm. The device is provided with a position detection system for detecting a pressing-arm actual position that deviates from a desired position of the pressing arm. A malfunction or defect of the pressing element is detected by means of the pressing arm actual position that deviates from the desired position of the pressing arm.

A superfinishing machine and a superfinishing method which can perform axially uniform finishing on a logarithmically crowned surface formed on an inner peripheral surface of an annular member in a short time, and an outer ring of a bearing having a raceway surface superfinished by the superfinishing method, are provided. A superfinishing machine 1 includes a linearly reciprocating mechanism 40 configured to linearly reciprocate a grinding stone 3 held by a pressing section 30, along a plane B touching a generatrix of the logarithmically crowned surface, and in a direction C inclined by a given angle with respect to a center axis O of an outer ring 10.

A superfinishing machine and a superfinishing method which can perform axially uniform finishing on a logarithmically crowned surface formed on an inner peripheral surface of an annular member in a short time, and an outer ring of a bearing having a raceway surface superfinished by the superfinishing method, are provided. A superfinishing machine 1 includes a linearly reciprocating mechanism 40 configured to linearly reciprocate a grinding stone 3 held by a pressing section 30, along a plane B touching a generatrix of the logarithmically crowned surface, and in a direction C inclined by a given angle with respect to a center axis O of an outer ring 10.

A device for finish-machining a workpiece in the form of a crankshaft or a camshaft includes a workpiece holder and a rotational drive configured to rotate the workpiece about a workpiece axis. A first finishing tool is configured to machine a main bearing which is concentric with the workpiece axis. A second finishing tool is configured to machine an additional bearing which is radially offset from the workpiece axis. A first tool drive is configured to generate an oscillating movement of the first finishing tool in a direction parallel to the workpiece axis. A second tool drive is configured to generate an oscillating movement of the second finishing tool which is independent of the movement of the first finishing tool in a direction parallel to the workpiece axis.

A device for finish-machining a workpiece in the form of a crankshaft or a camshaft includes a workpiece holder and a rotational drive configured to rotate the workpiece about a workpiece axis. A first finishing tool is configured to machine a main bearing which is concentric with the workpiece axis. A second finishing tool is configured to machine an additional bearing which is radially offset from the workpiece axis. A first tool drive is configured to generate an oscillating movement of the first finishing tool in a direction parallel to the workpiece axis. A second tool drive is configured to generate an oscillating movement of the second finishing tool which is independent of the movement of the first finishing tool in a direction parallel to the workpiece axis.

A vibrating stone grinder, comprising a lower housing, an upper housing and a control panel, wherein the upper housing is fixedly connected to an upper surface of the lower housing, a protective cover is arranged on an inner wall of the upper housing, and the control panel is arranged at a joint position of the upper housing and the lower housing, wherein the control panel comprises a assembly main board, the assembly main board is bolted to the inner wall of the lower housing, a surface of the assembly main board is fixedly connected with a display screen, a power switch, an acceleration button, a deceleration button, and an adjustment button.