A plurality of interposers are made from a material substrate. The material substrate includes a glass substrate partitioned by a plurality of crossing division lines to define a plurality of separate regions. A multilayer member is provided on a first surface or a second surface opposite to the first surface of the glass substrate and has an insulating layer and a wiring layer. An exposed surface of the multilayer member is cut along each division line by using a first cutting blade to form a cut groove on the exposed surface of the multilayer member, the cut groove having a depth not reaching the glass substrate. The glass substrate is cut along each cut groove by using a second cutting blade having a thickness smaller than the width of each cut groove to thereby divide the glass substrate and manufacture the plural interposers.

A machine tool for multiple working for material removal from surfaces of bodies including a working station in which a plurality of rotary tools are positioned around a feed trajectory of said bodies; and guide means in which the bodies to be worked are made to translate one after another along said feed trajectory with a predetermined orientation position. At least one pair of rotary tools of said working station, intended to interact with the surfaces to be worked, inside slits in said bodies, in combination with each other and with guide means provided with partitions, help to keep said bodies in position during their related transit through said working station.

A machine tool for multiple working for material removal from surfaces of bodies including a working station in which a plurality of rotary tools are positioned around a feed trajectory of said bodies; and guide means in which the bodies to be worked are made to translate one after another along said feed trajectory with a predetermined orientation position. At least one pair of rotary tools of said working station, intended to interact with the surfaces to be worked, inside slits in said bodies, in combination with each other and with guide means provided with partitions, help to keep said bodies in position during their related transit through said working station.

In a power steering device equipped with a rack shaft constructed by joining a first member having rack teeth and a second member serving as a ball screw shaft on which a ball screw groove is formed, a grinding process of the ball screw groove is performed on the second member by causing a grindstone to rotate and move along a rotation axis of the second member, while causing the second member to rotate about an axis of the second member as the rotation axis. The grinding process is performed so as to satisfy a specified machining condition g/(5p)<w<g/p, where w is a rotational speed of the second member during grinding of the ball screw groove, g is a rotational speed of the grindstone during grinding of the ball screw groove, and p is a circumferential length of one circumference of the ball screw groove around the rotation axis.

In a power steering device equipped with a rack shaft constructed by joining a first member having rack teeth and a second member serving as a ball screw shaft on which a ball screw groove is formed, a grinding process of the ball screw groove is performed on the second member by causing a grindstone to rotate and move along a rotation axis of the second member, while causing the second member to rotate about an axis of the second member as the rotation axis. The grinding process is performed so as to satisfy a specified machining condition g/(5p)<w<g/p, where w is a rotational speed of the second member during grinding of the ball screw groove, g is a rotational speed of the grindstone during grinding of the ball screw groove, and p is a circumferential length of one circumference of the ball screw groove around the rotation axis.

A chuck for a machine tool having a rotation spindle with a main axis of rotation. The chuck comprises a base plate, a first rotatable plate eccentrically mounted on the base plate, a second rotatable plate eccentrically mounted on the first rotatable plate, balancing means for aligning a principal axis of inertia of the chuck with the main axis of rotation and a holding mechanism. The chuck is provided with an actuating mechanism for angularly displacing the first rotatable plate around a first rotation axis over a first angle of rotation and/or the second rotatable plate around a second rotation axis over a second angle of rotation such that the position of the object with respect to the main axis of rotation can be altered.

A method for manufacturing a rotor includes the following operations: the clamping of a workpiece in a grinding machine; the performance of one or more cylindrical grinding operations whereby a rotor shaft section is ground to the desired diameter with a cylindrical grinding disk; the performance of one more profile grinding operations whereby a rotor body is profiled with a profile grinding disk. During the manufacture of the rotor in the grinding machine, the workpiece is not undamped and the cylindrical grinding operations and the profile grinding operations are done with the same grinding machine.

A SiC wafer is processed by a laser beam having a wavelength that transmits SiC to form a peeling plane in a region of the wafer which corresponds to a device area of a first surface of the wafer. A plurality of devices demarcated by a plurality of intersecting projected dicing lines in the device area are formed on the first surface. An annular groove is formed on a second surface of the wafer which is opposite the first surface, in a boundary region of the wafer between the device area and an outer peripheral excessive area surrounding the device area. A portion of the wafer which is positioned radially inwardly of the annular groove is peeled from the peeling plane, thereby thinning the device area and forming an annular stiffener area on a region of the second surface which corresponds to the outer peripheral excessive area.

In a plastic nut for a ball screw formed by injection molding fiber reinforced plastic, the reduction in precision over time due to wear is minimized. A thread groove is ground until the fibers in matrix plastic are exposed on the surface of the thread groove.

A method of shaping a laminated glass structure includes providing the laminated glass structure comprising a flexible glass sheet having a thickness of no greater than about 0.3 mm laminated to a non-glass substrate by an adhesive layer. The flexible glass structure and adhesive layer are ground using a first tool to remove glass material. The non-glass substrate is cut with a second tool different from the first tool through a kerf formed through the flexible glass structure thereby forming a shaped laminated glass structure. A glass edge strength of a cut edge of the shaped laminated glass structure is at least about 20 MPa.