Hitachi, Ltd.

Hidetoshi Inaba

Masahiro Watanabe

Koichi Sugimoto

Kichie Matsuzaki

Hisashi Onari

Hideaki Matoba

Hideaki Suzuki

Hiroshi Hasegawa

Shinichi Arai

Yoshio Matsumoto

Hisaaki Hirabayashi

Hiroshi Kato

Toru Mita

Masahito Uno

Ichiro Taniguchi

Tomoyuki Masui

Kaoru Imai

The present invention relates to a manufacturing system which accepts a custom order of product from a customer and custom manufactures a product without sacrificing manufacturing efficiency. The manufacturing system includes the featuring steps of inputting the required specification of a product, creating the product design based on the design information of the product transmitted from a designing department, status data from the production department, and the input required specification, showing the created product design to the customer, selectively indicating a product to be purchased, transmitting the specification of the selected product to the production department, and producing a product based on the selected product specification.

Custom-made manufacturing system and custom-made manufacturing method

Order entry apparatus for automatic estimation a transformation model comprising a pattern composed of a plurality of parameters representing custom product specifications, production line conditions and factors for composing the estimates for production cost and completion date. The parameters of this transformation model are specified by learning, leading to estimation for the requested product specifications, in broad consideration of conditions such as those of the production line. The use of a neural network model as this pattern transformation model makes pattern transformation more flexible and pattern learning more efficient. Estimation accuracy is also increased by entering values of predicted charges in production line conditions such as loads or stock obtained from resource requirements planning, process design, capacity requirements planning, etc.

Order entry apparatus for automatic estimation and its method

The turn-of-nut tightening method that is improved by determining the starting point only through measurements of the angle and time relationship to determine the linear portion of the tightening curve, which is extended to the previous free running speed point where the corresponding angle is determined as the starting angle, to which is added a fixed turning amount to control the end of the tightening. As a specific embodiment, the turning angle is chosen as the variable and measured with specific time intervals. Using fixed time intervals, time is removed as a variable. Therefore, with a simple and economical angle measuring device, such as a shaft encoder, tightening is accurately controlled.

Rotational angle control of screw tightening

The present invention relates to a method and an apparatus for calibrating a transformation matrix of a force sensor, in which: a force sensor is attached between a wrist portion and a hand portion of a robot; a standard work (weight) whose weight and position of a center of gravity are known is attached or held to the hand portion; each driving source of the robot is made operative in response to commands from a control unit and thereby sequentially changing the posture of the force sensor attached to the robot; the control unit obtains a force consisting of a force and a moment due to an arithmetic operation from the posture and position information of the force sensor which is detected on the basis of signals from encoders to detect an operational amount of each operating element of the robot and from the weights and the positions of the centers of gravity of the standard work and the hand portion and the like inputted as data; the control unit receives a strain voltage detected from the force sensor; the control unit calculates the transformation matrix of the force sensor from the force consisting of the force and moment derived and from the strain voltage received in accordance with a predetermined arithmetic logic equation and then stores the transformation matrix into memory means; and then the transformation matrix of the force sensor is calibrated.

Method and apparatus for calibrating transformation matrix of force

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Sapporo, Japan

Hidetoshi Inaba