The invention relates to a tool for cleaning rollers (2a, 2b) of machines for closing container or cans, which comprises a head (1) which is couplable to a motor and on which are mounted: rotary drive discs (14) of the rollers (2a, 2b) to be cleaned and which comprise at least one element for making contact with the rollers, to transmit traction to same; at least one actuator disc (15, 16) that has a different rotation direction and/or rotation speed to the drive discs (14), and which is provided with at least one element for cleaning the rollers (2a, 2b); and a transmission (50) disposed between the motor and the discs (14, 15, 16).

Disclosed is a cannula that can decrease the rate of increase in resistance that is generated when penetrating an incision formed in tissue. The cylindrical cannula (1) configures a trocar (B) used during surgery; an incision member (C) can be inserted and removed therewithin; one side of the end portion of the cylinder forms a protruding slanted cut end (2); and a tapered surface (3) having an uneven width and a width that is wider on the protruding side (the side of point 2a) of the slanted cut end than the non-protruding side (the side of point 2b) is formed on the outer periphery of the slanted cut end (2).

An apparatus comprising a workpiece spindle for accommodating a gear wheel workpiece, wherein the gear wheel workpiece is rotationally drivable about a workpiece axis of rotation, a first tool spindle for accommodating a first tool, wherein the first tool is rotationally drivable about a first tool axis of rotation, and comprising multiple NC-controllable axes, which are designed to move the first tool in relation to the gear wheel workpiece so that tooth flanks of the gear wheel workpiece can be machined using the first tool, a second tool spindle for accommodating a second tool, wherein the second tool is rotationally drivable about a second tool axis of rotation, a linear carriage, which supports the second tool spindle and comprises an NC-controllable linear drive to be able to linearly displace the linear carriage along a linear guide in relation to the gear wheel workpiece.

A grinding stroke control device for a valve stem grinding apparatus is fixed to a processing machine and provided for gripping a valve stem or a test bar. Using the hand wheel, the dial gauge and the positioning seat can obtain an initial position, then moving the measuring meter of the positioning mechanism along the transverse direction to make sure the valve stem has the right length with a standard valve clearance. By such arrangements, the grinding stroke control device for a stem valve grinding apparatus of the invention can have a less complicated structure and therefore is more convenient to operate.

A method of conducting a material removal operation using a grinding system including moving an abrasive article relative to a workpiece, detecting a change in a dimension of the abrasive article during moving, and reducing resonance vibrations in the grinding system.

A method of conducting a material removal operation using a grinding system including moving an abrasive article relative to a workpiece, detecting a change in a dimension of the abrasive article during moving, and reducing resonance vibrations in the grinding system.

A method of collectively producing display panels each having an outline a part of which is curved includes a bonded substrate forming process of bonding substrates in a pair one of which has thin film patterns and forming a bonded substrate 50, a layering process of layering multiple bonded substrates 50 via curing resin 60 and curing the curing resin 60, a grinding process of collectively grinding the substrates in a pair and the curing resin 60 that are outside the thin film pattern on each of the bonded substrates 50B that are layered on each other along the outline and collectively forming edge surfaces of the display panels each having the curved outline, and a separation process of separating each of the bonded substrates 50B that are layered on each other from the curing resin 60.

Provided are a roll polishing rotary grinding stone and a roll polishing device and method which are configured to stably perform roll polishing without making the surface roughness of a surface to be processed non-uniform by preventing polishing debris to be generated during polishing from being accumulated in a recess at a center of a polishing surface of the roll polishing rotary grinding stone body. The roll polishing rotary grinding stone includes: a rotary grinding stone body having a rotary shaft mounted on a back end face and a polishing surface formed on a front end face; and a recess formed at a center of the front end face of the rotary grinding stone body, the roll polishing rotary grinding stone being configured to perform vertical polishing with respect to a surface of a roll by bringing the polishing surface into contact with the surface of the roll, in which the recess is formed into a tapered recess in which an inner peripheral surface of the recess is increased in diameter from the back end face of the rotary grinding stone body toward the front end face of the rotary grinding stone body.

Provided are a roll polishing rotary grinding stone and a roll polishing device and method which are configured to stably perform roll polishing without making the surface roughness of a surface to be processed non-uniform by preventing polishing debris to be generated during polishing from being accumulated in a recess at a center of a polishing surface of the roll polishing rotary grinding stone body. The roll polishing rotary grinding stone includes: a rotary grinding stone body having a rotary shaft mounted on a back end face and a polishing surface formed on a front end face; and a recess formed at a center of the front end face of the rotary grinding stone body, the roll polishing rotary grinding stone being configured to perform vertical polishing with respect to a surface of a roll by bringing the polishing surface into contact with the surface of the roll, in which the recess is formed into a tapered recess in which an inner peripheral surface of the recess is increased in diameter from the back end face of the rotary grinding stone body toward the front end face of the rotary grinding stone body.

The present invention relates to a chemical mechanical polishing (CMP) apparatus for polishing a workpiece, such as a metal body, to a mirror finish. The chemical mechanical polishing apparatus includes: a polishing pad (2) having an annular polishing surface (2a) which has a curved vertical cross-section; a workpiece holder (11) for holding a workpiece (W) having a polygonal shape; a rotating device (15) configured to rotate the workpiece holder (11) about an axis of the workpiece (W); a pressing device (14) configured to press a periphery of the workpiece (W) against the annular polishing surface (2a); and an operation controller (25) configured to change a speed at which the rotating device (15) rotates the workpiece (W) according to a rotation angle of the workpiece (W). The pressing device (14) is disposed more inwardly than the workpiece holder (11) in a radial direction of the polishing table (3).