Komatsu Corporation

Kabushiki Kaisha Komatsu Seisakusho

Komatsu Industries Corporation

Ikuo Kamada

Yoshihiro Yamaguchi

Hiroyuki Kitabayashi

Yoshiaki Kuroda

Satoshi Matsuura

Takiji Kitagawa

Tetsuya Kabata

Toshiyuki Ooenoki

Takahiro Iriyama

A plasma cutting device performs cutting in a plurality of stages. In a first cutting sub-process, a manufactured product is cut out from a base material upon a stage according to an NC program. Next, images of respective regions in the vicinities of proper positions at two corner points of the manufactured product which has been cut out are photographed by an image sensor, the actual positions of these two corner points of the manufactured product are detected from these images which have been photographed, and the translation distances and the rotational angle between the actual positions which have been detected and the proper positions are calculated. The NC program is corrected. And, in a subsequent cutting sub-process, additional cutting for beveling is carried out upon cutting surfaces at the outer circumference of the manufactured product, according to the corrected NC program.

Automatic cutting device and production method for beveled product

A hybrid thermal cutting apparatus has both a laser head and a plasma torch, both of which can be controlled independently, can perform both laser processing and plasma processing, thus reducing the running costs. A large number of cutting lines for cutting out various types of manufactured products from plate materials are classified into a laser cutting type and a plasma cutting type, according to the cutting length, whether they are the external periphery of manufactured products or apertures, the size of the manufactured products or the apertures, the required process accuracy, the plate thickness, or the like. The lines of the laser cutting type are cut by laser processing, while the lines of the plasma cutting type are cut by plasma processing.

Hybrid thermal cutting apparatus

Punch press

A punch press comprising (i) a tool set magazine that is located above a work table for supporting a workpiece and is juxtaposed with a main frame for supporting a punching head and (ii) a tool set delivery system for delivering tool sets between the tool set magazine and the punching head. A tool set mounting method comprising the steps of: (a) inserting the tool set delivery means into a tool set mounting section in a horizontal direction with a very small gap between the contact surface of an punch and its corresponding surface of the tool set mounting section opposite to the punch's contact surface and between the contact surface of a die and its corresponding surface of the tool set mounting section opposite to the die's contact surface; (b) lowering the tool set delivery means after the inserting step in such a direction that the small gap between the contact surface of the die and its corresponding surface of the tool set mounting section is eliminated; and (c) pulling the tool set delivery means out of the tool set mounting section in the horizontal direction after the lowering step while leaving the punch and die to be retained in the tool set mounting section.

Tool set mounting method

Die management method for punch press

A metal sheet bending machine for bending a metal sheet inserted between an upper bender and lower bender to a desired angle. While the metal sheet is being bent to the desired angle, a linear image of projected measuring light, which rotates with a change in the bending angle of the metal sheet, is formed by a measuring light source on an outer face of the bent metal sheet and sequentially photographed and stored. Based on the stored images, the bending angle of the metal sheet is calculated. Based on the result of the calculation, the positions of tile upper and/or lower benders are controlled whereby the metal sheet can be bent to the desired angle. The bending angle of the metal sheet may be obtained based on the rotating angle of the linear image of projected measuring light formed on the photographed images, or based on an angle formed by the linear image of projected measuring light and a linear image of projected reference light formed by a reference light source for projecting light onto the outer face of the metal sheet while the metal sheet is being bent to the desired angle so as to form the linear image at a desired fixed angle irrespective of the bending angle.

Metal sheet bending machine

Growing community of inventors

Komatsu, Japan

Ikuo Kamada