Nippei Toyama Corporation

Mitsuru Nukui

Shirou Murai

Toyotaka Wada

Kenichiro Nishi

Kazuo Nakajima

Tetsuo Okuyama

Tsutomu Sugihara

Michihiro Takata

Muneaki Kaga

Yoshihiro Shiraishi

Tomio Nakagawa

A machine tool has a support table provided on an upper surface of a bed to support a work, a Z-axis saddle, a machining unit mounted on the Z-axis saddle and provided with a machining head, a compartment cover arranged on the bed to compartment a region and a machine region, an opening window provided on the compartment cover to permit the machining head to go in and out therethrough, and a seal member in the form of a closed ring to be mounted on an inner peripheral edge of the opening window of the compartment cover, wherein an entire periphery of an outer peripheral surface of the machining head is brought into sliding contact with an inner peripheral edge of the seal member in a state, in which the machining head is moved into the machining region from a tool exchange position within the machine region.

Machine tool

A lubricant supply apparatus includes a tank holder portion and a lubricant tank portion . In case where a tool holder clamp device provided on a spindle shaft pushes against an abutting member disposed in the lubricant supply apparatus , lubricant filled in a pressure chamber formed in the lubricant supply apparatus can be jetted out from injection holes , &mdash;formed in the abutting member . The thus jetted-out lubricant is supplied to the tool holder clamp device

Method and apparatus for supplying lubricant

A workpiece,formed of a circular thin plate is rotated about its center as an axis L,. Each of disk-shaped rotating grinding wheels,and,, while being rotated about an axis L,extending in a direction substantially parallel to the plane of the workpiece,and perpendicular to the radial direction of the workpiece,, is made to undergo relative feeding movement on both obverse and reverse surface sides of the workpiece,along an outer peripheral edge portion,of the workpiece,. Consequently, the outer peripheral edge portion,of the workpiece,is ground by an outer peripheral surface of each of the rotating grinding wheels,and,. In this case, it is preferred that two grinding wheels,and,for rough grinding and finish grinding be provided as the disk-shaped rotating grinding wheels, and that rough grinding and finish grinding are performed by the same station.

Method and apparatus for grinding a workpiece

A workpiece receiving hole,for fittingly receiving a workpiece,is formed in the center of a rotary disk,which is thinner than the workpiece,. A workpiece drive section,which engages a notch,formed for the purpose of orienting the workpiece,relative to crystal orientation is formed along the brim of the hole,. A gear,is rotated by a gear,of a motor,, thereby rotating the rotary disk,and imparting torque to the workpiece,. Accordingly, both surfaces of the workpiece are ground by means of a double disc surface grinder.

Grinding method, surface grinder, workpiece support, mechanism and work rest

A spindle,of a grinding wheel,is rotatively borne by a bench,for the grinding wheel through hydrostatic thrust bearings,and,. A pressure regulator,for regulating the pressure which must be supplied to at least either of supply ports,and,opposite to each other in the direction of the axial line of the spindle,in the hydrostatic thrust bearings,and,is provided. The pressure regulator,has a changing member for changing a passage for choking the fluid and the length of the choking passage.

Feeding a grinding wheel in grinding method

A method of slicing an ingot wherein a pre-cut work 3 in which a holding member 2 extending over the entire length of a side surface of a cylindrical ingot 1 is bonded to the side surface of the ingot 1 is set on a slicing apparatus 4, and the pre-cut work 3 is split into a multiplicity of pieces over its longitudinal direction so as to obtain disk-shaped works 5 to be ground, characterized in that a retaining member 2 is used in which a retaining layer 7 which is directly bonded to the side surface of the ingot 1 by a first adhesive agent having an adhesive strength sufficient to receive a rotating force due to a grinding apparatus 6 in a subsequent grinding process, an intermediate layer 8 which is bonded to said retaining layer 7 in a superposed manner by a second adhesive agent whose adhesive strength deteriorates more than that of the first adhesive agent under a fixed condition, and a supporting layer 11 which is connected to said intermediate layer 8 and is connected to a supporting portion 10 of said slicing apparatus 4 are integrally superposed one on top another.

Ingot slicing method, an ingot manufacturing method and a sliced ingot

A spindle 23 of a grinding wheel 28 is rotatively borne by a bench 22 for the grinding wheel through hydrostatic thrust bearings 26 and 27. A pressure regulator 38 for regulating the pressure which must be supplied to at least either of supply ports 26a and 27a opposite to each other in the direction of the axial line of the spindle 23 in the hydrostatic thrust bearings 26 and 27 is provided. The pressure regulator 38 has a changing member for changing a passage for choking the fluid and the length of the choking passage.

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Toyama, Japan

Mitsuru Nukui