Jtekt Corporation

Eiji Nakamura

Takashi Yokoyama

Akihiko Kadota

Norikazu Sawaki

Yasuhiro Komai

Kichiji Takeshita

Minoru Ohki

Fumiki Ogawa

Tohru Ozeki

Koyo Yamazaki

A conveying apparatus conveys an article between a wait position and a processing position. The conveying apparatus includes a plurality of arms that sandwiches the article between leading ends of the arms located on opposite sides of the article and that is provided to enable base ends of the arms to turn so as to move the leading ends in an up-down direction, and a control apparatus that turns the arms to lift the article located at one of the wait position and the processing position and sandwiched between the arms and that moves the arms with the article kept lifted thereby to the other of the wait position and the processing position, the control apparatus turning the arms to lower and mount the article at the other of the wait position and the processing position.

Conveying apparatus

At a contact step in a tool radius adjusting method, a reference portion of a movable body provided radially movably on a housing of a boring tool and a position adjusting reference member fixed on a machine tool are brought into contact by sliding the movable body relative to the housing so that the position of a cutting blade comes to a predetermined position in a direction to go away from a rotational axis. Then, at an adjusting step, the position of the cutting blade relative to the rotational axis is adjusted by changing the relative position between a tool spindle holding the boring tool and the position adjusting reference member in a direction to come close to each other by drive mechanisms of the machine tool used for positioning a spindle head with the tool spindle relative to a workpiece in machining the workpiece with the cutting blade.

Tool radius adjusting method in machine tool and machine tool for practicing the method

A tool radius adjusting device executes an operation for adjusting the tool radius of a boring holder in parallel with execution of a machining program for executing an operation of a spindle head and an operation of a tool changer. A carrier control unit determines whether the tool changer is executing a tool changing process. When the tool changing process is not being executed, the carrier control unit allows the carrier device to execute an operation for picking the boring holder out from the tool magazine and an operation for returning the boring holder, of which the tool radius has been adjusted, to the tool magazine.

Machine tool including tool radius adjusting device

A boring holder in a tool radius adjusting system is provided with a cutting blade and fine and coarse motion adjusting mechanisms each capable of adjusting the position of the cutting blade relative to a rotational axis of the boring holder. The tool radius adjusting system is provided with a tool radius measuring device for measuring the tool radius of the boring holder and a controller configured to calculate a compensation amount based on a tool radius measured by the tool radius measuring device and a target tool radius and to operate the fine and coarse motion adjusting mechanisms based on the compensation amount so that the tool radius is brought into agreement with the target tool radius.

Tool radius adjusting system for boring holder, tool radius adjusting method in machine tool, and machine tool

A machine tool includes: a hydraulic pump that supplies pressure oil; a fixture plate that positions a workpiece; a fixture base that detachably holds the fixture plate and that moves relative to a tool during machining; a hydraulic cylinder performs an attaching/removing operation for attaching or removing the fixture plate to or from the fixture base; an accumulator that accumulates the pressure oil from the hydraulic pump and that supplies the pressure oil to the hydraulic cylinder; and a manual valve that is manually switched to supply the pressure oil in the accumulator to the hydraulic cylinder to thereby control the attaching/removing operation of the hydraulic cylinder.

Growing community of inventors

Nagoya, Japan

Eiji Nakamura