Citizen Holdings Company, Ltd.

Citizen Machinery Co., Ltd.

Citizen Watch Company, Ltd.

Yutaka Shibui

Hajime Matsumaru

Hitoshi Matsumoto

Keita Kazuie

Hiroshi Shinohara

Umeo Tsuyusaki

Satoru Akimoto

Shigeo Yanagidaira

Kiyohiko Watanabe

Junichi Ueno

A bar material supplying device includes a feed rod having a leading end provided with a finger chuck, a feed rod servomotor and an air cylinder device that move the feed rod in a longitudinal direction to insert and pull the bar material into and from the finger chuck, and an NC device that controls driving of the feed rod servomotor and driving of the air cylinder device. The NC device controls the driving of the feed rod servomotor and the driving of the air cylinder device to move the feed rod in an operation of inserting and pulling the bar material into and from the finger chuck, and operates as an error allowable device that allows an error of an operation amount of the feed rod servomotor motor in the operation of inserting and pulling the bar material into and from the finger chuck.

Bar material supplying device and numerical control machine tool having the same

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

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 machine tool is provided with a tool mounting part mounting and holding a tool for working a workpiece, a motor rotating the tool mounting part such that an edge of the tool is inclined with respect to the workpiece, a control device holding the tool standby such that the edge of the tool is positioned at a working standby position proximal to a surface of the workpiece and starting a working movement from the working standby position. In the machine tool, the control device includes a working standby position correcting device to correct the working standby position to a corrected working standby position according to a diameter d of the tool and a rotational angle &#x3b8; of the tool mounting part such that the tool does not interfere with the workpiece when the tool is held standby at the working standby position in a rotated state by the motor.

Machine tool

A tool selection method, for a machine tool, comprising the steps of identifying the maximum tip distance (D) of a currently selected tool (), a next designated tool () and an intermediate tool () disposed therebetween; moving a tool rest () in the +(plus)X-axis direction after a machining by the currently selected tool () is completed until the tip of the currently selected tool () is spaced from a workpiece (W) along the X-axis by a distance provided by adding a clearance distance (E) to a difference between the maximum tip distance (D) and the tip distance (D) of the currently selected tool (); moving the tool rest () in the +(plus)Y-axis direction until the tip of the next designated tool () is aligned with the rotation center axis () of the workpiece (W) in the X-axis direction; and moving the tool rest () in the &#x2212;(minus)X-axis direction.

Tool selection method for machine tool, control device, and numerically controlled lathe

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

A method of optimizing the tool selecting operation of a turret according to the contents of a machining program in a turret tool rest allowing a rotating tool to be fitted thereto, including a step () for determining whether the rotating tool is contained in various types of tools fitted to the turret, a step () for, when the rotating tool is contained, selecting whether the phase of the rotating motion of the rotating tool fitted to the turret is adjusted to be identical in each time the rotating tool is disposed at an indexing position, a step () for, when the phase of the rotating motion of the rotating tool is adjusted to be identical, performing a 'less than one rotation control' in which the cumulative sum of the turning indexing motion of the turret in a same turning direction is less than one rotation, and a step () for, when the rotating tool is not contained in the fitted tools or the adjustment of the phase of the rotating motion is not performed even if the rotating tool is contained in the fitted tools, performing a 'shortcut rotating control' in which the turning indexing motion of the turret is equal to or less than half a rotation in any turning direction.

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Saku, Japan

Yutaka Shibui