Kabushikikaisha Taiheiseisakusho

501 Kirin Beer Kabushikikaisha

Hiromi Suzuki

Eiiti Suzuki

Isao Mizuno

The invention provides a novel cutting tool used in wood working, which has a sufficiently thick cutting edge allowing stable cutting of a veneer from a log as well as an apparatus for and a method of grinding the cutting edge to have a favorable shape and a relatively large angle. The apparatus of the invention includes a table which an elongated cutting tool extending along a longitudinal axis of the table is mounted on, a fixing element for pressing the cutting tool upright against an upright plate, and a carriage which is reciprocatingly movable along the longitudinal axis of the table. The carriage is provided with a pair of grinding wheels which are respectively movable into and out of endwise grinding contact with an upper surface and a lower surface of the cutting edge of the upright cutting tool at desirable angles. The apparatus further includes a control mechanism for controlling a moving distance and an inclined angle of each grinding wheel according to a preset number of grinding steps and a predetermined grinding depth and a predetermined grinding angle at each grinding step for each surface of the cutting edge. The upper surface and the lower surface of the cutting edge are respectively multiple-taper ground to have an arc-shaped surface from the tip portion to the base portion of the cutting edge.

Elongated cutting tool for wood working and apparatus for and method of

The invention provides an improved apparatus for grinding longitudinal ends of the cutting edge to a desired degree of superfine finish as a grinding wheel reciprocates between the ends. The apparatus applies a relatively constant pressure to the grinding wheel, thus allowing stable and desirable grind.

Apparatus for superfinishing cutting edges

For superfinishing an elongate cutting tool which has been rough-ground by a separate machine, a pair of grinding wheels are first urged against the opposite sides of the work via respective fluid-actuated cylinders, until sufficient fluid energy builds up in the cylinders to enable the grinding wheels to grind the work to any desired depths. Being mounted on a common carriage, the grinding wheels are then reciprocated longitudinally of the work while being held in constant rotation and being urged against the work under the fluid pressure. On reaching either end of the work during such reciprocation, the grinding wheels are relieved of the fluid pressure until they restart traveling toward the other end, in order to avoid overgrinding the opposite ends of the work. The reciprocation of the grinding wheels is terminated when the opposite sides of the work are ground to required degrees. The complete operation can be automated. Preferably, one of the grinding wheels is angularly displaceable relative to the work about an axis parallel to the longitudinal direction of the work.

Growing community of inventors

Oobu, Japan

Hiromi Suzuki