Hitachi Seiko, Ltd.

Hitachi Via Mechanics Ltd.

Akira Irie

Yasuhiko Kanaya

Tamio Otani

Yasushi Ito

Katsuhiro Nagasawa

Tamio Ohtani

Toru Yuki

Akihiro Matsuya

Kouji Yamaura

Tadanori Dobashi

A manufacturing method of a multi-layered circuit board allows electronic parts to be mounted adequately and will not hamper performance of the electronic parts. A power terminal (pin) of an electronic part to be mounted on a surface of the multi-layered circuit board is inserted into a plated through hole to connect with a first conductive layer. A detecting section having a detecting hole which is formed coaxially with the through hole and whose diameter is larger than the through hole is provided on a second conductive layer on the back of the first conductive layer. A hole having a large diameter is formed by a tool along the through hole from the back while applying voltage between the second conductive layer and the tool. The depth of the hole is set based on the tool electrically conducting with the detecting hole. Unnecessary plate of the through hole may be removed by the large hole.

Manufacturing method of a multi-layered circuit board

A printed circuit board processing machine has: a table that can travel in a X-direction carrying a printed circuit board thereon; a cross rail arranged so as to straddle the table; a plurality of sliders supported for independently movement in a Y-direction by the cross rail; a plurality of spindles supported for movement in a Z-direction by the sliders; a magnetic rail of a linear-motor fixed to the cross rail; and a plurality of coils of the linear-motor fixed to the sliders so as to oppose the magnetic rail.

Printed circuit board processing machine

Nuts are engaged with one ball screw , and the nut is directly fixed on a slider main body . The nut is rotatably held by a bearing , and a bearing holder holding the bearing is fixed on a slider main body . And, a gear is fixed on the side of the nut , and a gear engaging with the gear is provided. And, a motor for driving a gear is fixed on a bracket , being united with the slider main body . The ball screw is stopped and the motor is rotated so as to individually position the slider . Even if the number of the sliders is increased, a machine is not made bigger, and the printed board processing machine having simple structure can be provided.

Printed board processing machine

A printed circuit board working machine includes a spindle which holds a cutting tool and is movable to bring the tool into contact with and away from a printed-circuit board to be worked. A device for pressing down the printed-circuit board comprises a support mechanism associated with the spindle of the working machine for relative movement thereto, a plurality of holding sections movably supported by the mechanism and a driving mechanism for the holding sections. The holding sections are formed with holes of different sizes, respectively. When working operation, after the support mechanism causes the holding sections to move away to a position free from interference with the tool, the driving mechanism moves the holding sections to align one of the through holes, corresponding to a size of the tool to be used, with the tool. Subsequently, the support mechanism returns the holding sections to an initial position and, before the tool reaches the printed-circuit board, brings the corresponding holding section into pressure contact with the printed-circuit board.

Printed-circuit board holding device

A device for exchanging tools for use with a spindle has a tool holding device having a plurality of tool holding members disposed at predetermined intervals. Each tool holding member is supported for movement in its axial direction and is axially driven by a drive device so that a tool is transferred between the tool holding member and the spindle. The invention is also concerned with a tool exchanging method.

Device and method of exchanging tools

An apparatus and method for supplying a printed circuit board to a printed circuit board drilling machine and for returning the printed circuit board after the drilling. A stocker stores a plurality of printed circuit boards in a tilted state, and a plurality of conveyor rollers provides a conveying path for the printed circuit boards. A conveyor device which includes conveyor rollers provides a conveying path connected to the first mentioned conveying path. The arrival of the printed circuit board is detected at a predetermined position, and the printed circuit board is then decelerated by braking in response to a signal from the detection. A device is provided on the printed circuit board drilling machine for delivering the printed circuit board to the printed circuit board drilling machine. A base plate can be provided with a pair of locating pins for being anchored to the drilling machine table and has the printed circuit board mounted thereon so that the drilling machine can handle one pattern and number of location pins regardless of the number and pattern of fixing pins on the printed circuit board.

Growing community of inventors

Kanagawa, Japan

Akira Irie