Other

Sintokogio, Ltd.

Research Development Corporation of Japan

Yamazaki Mazak Corporation

Amino Iron Works Co., Ltd.

Shinsin International Development Corporation

Takeo Nakagawa

Kiyoshi Suzuki

Yoshiharu Takada

Norihiko Shimizu

Akira Yanagisawa

Sakae Hatano

Hiroyuki Noguchi

Toyoji Fuma

Kazuhiko Nakamura

Tetsutaro Uematsu

Takehiro Inagaki

Kanji Sato

Kenzo Hanawa

Masanobu Tsuchida

Munetada Kurita

Yoshikazu Hayashi

A machining tool is provided with an electric discharge truing/dressing apparatus comprising a spindle stock for containing and supporting a workpiece spindle which is driven for rotation while holding a workpiece or an electrode; a tool rest which moves parallel and perpendicular to the spindle of the spindle stock and holds an electrode machining tool and a grinding wheel; a feed electricity means disposed between a workpiece supporting portion of the spindle and the tool rest; a magazine disposed at an outside area of a machining area of the tool rest and adapted to store the workpiece and the electrode; and a loading device disposed between the magazine and the spindle. The grinding wheel on the tool rest is subjected to truing/dressing by feeding the electrode from the magazine to the spindle stock.

Machine tool with grinding function and truing/dressing method of

Short, fine fibers having certain aspect ratios and generally triangular cross-section are mixed with particulate material whereby the fibers form a three dimensional network and the mixture is sintered to provide composites containing scattered and enveloped particulate material, which composites have utility as self-lubricating materials or grinding materials.

Sintered composite materials with short metal fibers as matrix

As a grinder is being rotated, an outer circumference thereof and a metal block of raw material are pressed at determined speed or under determined pressure, and the grinder cuts the block on its surface so as to generate short metal fibers of not more than about 15 .mu.m calculated as diameter and not more than about 400 .mu.m in length by contacting between each of abrasive grains held in a matrix of the grinder and the surface of the raw material.

Method for producing ultra fine and short metal fibers

Proposed models are used for forming into destined shapes liquid, slurry, soft, sheet or lump materials, and are provided with endurance for many times of use and excellent permeability. A basic feature is that aggregates are ferrous or non-ferrous metallic grains and ceramic grains, to which a binder contained in evaporating or consumable substance is added and kneaded, and sintered. The mode has a close hardened layer scattered with metallic oxides on at least a shell. The hardened layer has fine air vents in its thickness. The whole body of a model is 5 to 60% of porosity and more than 100 Kg/cm.sup.2 of compression strength.

Composite and durable forming model with permeability

A punch is pressed on a blankpiece into a die. The die is filled with liquid therein, whereby hydraulic counterpressure is generated by said pressing. The pressed blankpiece is forcibly followed in shape around the punch by hydraulic counterpressure, while part of the hydraulic counterpressure is automatically supplied to an outer circumference of the blankpiece via bypath passage. In case, the blankpiece is a plate, said supplied hydraulic pressure serves as compression force from the outer circumference of the flange to the radius direction. In case, the blankpiece is a product formed by a first drawing, said pressure serves as pressing force toward axial direction of a side wall of the product. When the supplied hydraulic pressure flows out from a space between the punch and a blank holder, the liquid serves as lubrication on an upper and lower surfaces of the blankpiece.

Metal sheet forming process with hydraulic counterpressure

Growing community of inventors

Kanagawa, Japan

Takeo Nakagawa