Citizen Watch Company, Ltd.

Citizen Machinery Co., Ltd.

Citizen Holdings Company, Ltd.

Mitsubishi Electric Corporation

Hajime Matsumaru

Yutaka Shibui

Hitoshi Matsumoto

Hiroshi Shinohara

Shigeo Yanagidaira

Keita Kazuie

Mitsuo Watanabe

Toru Takahashi

Masakazu Sagasaki

Junichi Kamata

Umeo Tsuyusaki

Takanori Shinohara

Satoru Akimoto

Yosuke Ando

Yoshiaki Hirakawa

Akihiko Shinohara

To include an analysis processing unit that obtains a movement command for moving on a movement path in a machining program, and vibration conditions for vibrating along the movement path, a command-movement-amount calculation unit that calculates a command-movement amount per unit time, a vibrational-movement-amount calculation unit that uses the vibration conditions to calculate a vibrational-movement amount per unit time at a time corresponding to the movement command, and a movement-amount combining unit that combines the command-movement amount with the vibrational-movement amount to calculate a combined movement amount, and that acquires a movement amount within the unit time such that a position, which has moved from a reference position for calculating the combined movement amount by the combined movement amount, is located on the movement path.

Numerical control device

A power consumption output device for an apparatus that manufactures a plurality of products from a quantity of supplied material in a series of repeated cycles, includes a detector for detecting power consumption in a time period that includes at least the time needed for manufacturing all of the products that can be manufactured from a given quantity of supplied material, from the time at which the supply of the material to the apparatus commences to the time at which any remaining material is ejected, and delivers an output indicating power consumption per product by using the power consumption detected by the power detector and the number of products manufactured from the given quantity of supplied material. The device is thus capable of precisely calculating the electricity cost per product manufactured by an apparatus whose power consumption varies from one cycle of operation to another.

Power consumption output device and system for an automatic lathe

A polygon machining method whereby first polygon machining using a polygon cutter is carried out on a workpiece, followed by machining using tools other than the polygon cutter, then second polygon machining using the polygon cutter again. The polygon machining method comprises: a first polygon machining step in which a main axis and a tool main axis are synchronously rotated such that the rotation speed of the main axis and the tool main axis are at a ratio required for the first polygon machining, and polygon machining is carried out; a machining step in which the ratio is changed to a second synchronization ratio such that the main axis rotates at a rotation speed required for machining after the first polygon machining, the main axis and the tool main axis are synchronously rotated, and machining is carried out on the workpiece that has received the first polygon machining; and a second polygon machining step in which the main axis and the tool main axis are synchronously rotated such that the rotation speed of the main axis and the tool main axis are at a ratio required for the second polygon machining, and polygon machining is carried out.

Polygon machining device and polygon machining method

The present invention provides a power-supply management device which can efficiently connect and disconnect power supply to an electric-powered section, and a machine tool including the power-supply management device. The power-supply management device () detects a synchronization command of a control program, and compares an operation time of the electric-powered section between synchronizations in each control system which is a synchronization target by the synchronization command on the basis of the detected synchronization command. Then, the power-supply management device () disconnects the power supply to the electric-powered section belonging to the control system except the control system having the maximum operation time of the electric-powered section between the synchronizations, and restarts the power supply at the end of the synchronization in each control system.

Power supply management device and machine tool having the power-supply management device

A polygon machining method whereby first polygon machining is carried out on a workpiece held by a main axis, by using a polygon cutter attached to a tool main axis, then machining using a tool other than the polygon cutter is carried out, and second polygon machining after said machining is carried out, using the polygon cutter. The polygon machining method comprises: a synchronized stopping step in which the main axis is stopped at a predetermined prescribed rotation position, in a state in which the main and the tool main axis during polygon machining are synchronously rotated when the first polygon machining has been completed; a synchronization release step in which the synchronization of the main axis and the tool main axis is released when starting machining after the first polygon machining; a main axis stopping step in which the main axis is stopped at a prescribed rotation position when the machining after first polygon machining has been completed; and a synchronization starting step in which the main axis and the tool main axis are synchronously rotated when starting second polygon machining.

At the time of two-dimensionally moving a mobile body of a machine tool, to a predetermined position, a speed of the mobile body is gently increased/decreased at an acceleration/deceleration equal to or less than the maximum acceleration/deceleration, from the time when the mobile body reaches a direction change point. Therefore, the moving time is shortened and a rapid acceleration/deceleration may be avoided.

Movement controller for controlling movement of mobile body of machine tool, machine tool provided with movement controller, and mobile body moving method

In a method of machining a work in a numerically controlled lathe, it is possible to reduce machining cost by shortening idle time at the time of switching and to enhance the lifetime by lessening a load on a feeding mechanism of a tool rest. After completion of the machining of a work W with a tool Ton one tool rest (), the one tool rest () is moved to a standby position B and, at the same time, the other tool rest () is moved from a standby position D and the feed speed of the other tool rest () is controlled such that the one and the other tool rests () simultaneously reach positions C and F preset between the work W and the standby positions B and D.

Method of machining work in numerically controlled lathe

An automatic lathe is provided which is capable of rapidly and easily switching between machining of a material with a guide bush and machining of the material without the guide bush. The automatic lathe has a head stock () and a guide bush support table (). The head stock () is provided with a spindle drive motor (). The guide bush support table () is provided with a guide bush rotating motor (). There are provided: support table fixing means () for positioning and fixing the guide bush support table (); a guide member () rotatably installed on the guide bush support table () and regulated so as not to move forward and backward and having a through-hole formed for a spindle () to be inserted therein; a guide bush () detachably fitted to the tip of the guide member (); and spindle fixing means () for positioning and fixing the spindle () on the guide bush support table () at a specified position when the guide bush () is removed from the guide member ().

Growing community of inventors

Nagano, Japan

Hajime Matsumaru