OKUMA CORPORATION

Provided is a tool magazine apparatus that has excellent workability and is capable of being downsized. A tool replacement device includes a fixed frame installed in an opening portion provided at a predetermined position of a tool magazine, a swivel frame disposed inside the fixed frame so as to be rotatable about a swivel axis extending in a vertical direction, and a tool replacement rack fixed to the swivel frame. The swivel frame is rotated to a deliverable position at which the tool replacement rack is parallel to a tool rack inside the tool magazine to enable a tool to be delivered between the tool replacement rack and a tool transfer device, and to a replaceable position at which the tool replacement rack is located outside the tool magazine to enable replacement of old and new tools.

A compensation value calculation method of a position measurement sensor in a machine tool includes a tool sensor sensing position measuring step, a position measurement sensor length calculating step, a relative position obtaining step, a reference tool distal end position measuring step, a tool sensor position measuring step, and a position measurement sensor length direction compensation value calculating step.

A position adjustment method of a manipulator in a machining system includes: positioning the manipulator such that a reference object having a specific shape gripped by or secured to an end effector is positioned at a workpiece grasping preparation position; mounting a contact-type sensor on a tool rest, moving the tool rest such that the contact-type sensor is brought into contact with the reference object, obtaining positions of translational drive axes at time points, and calculating contact point positions from the obtained translational drive axis positions; calculating an error of a position and/or a posture of the reference object gripped by or secured to the end effector from a plurality of the contact point positions and a command value; and compensating the position and/or the posture of the end effector so as to cancel the error of the position and/or the posture of the reference object.

A method includes: installing a square calibration master on a table, and measuring each of measurement surfaces A, B, and C of the square calibration master by a position measurement sensor attached to a main spindle; calculating a first squareness between the measurement surfaces A and B; calculating a second squareness between the measurement surfaces A and C; calculating a difference between the first squareness and the second squareness; comparing the difference with a preliminarily set difference threshold value; calculating an average value of the first squareness and the second squareness when the difference is equal to or less than the difference threshold value, and calculating a corrected squareness based on an angular deviation and the first squareness or the second squareness when the difference exceeds the difference threshold value; and setting the compensation parameter based on the average value or the corrected squareness.

A piping structure for a machine tool includes a structural body and at least one piping hose. The structural body includes a fixed portion having a mounting portion mountable into a predetermined receiving portion and a rotating portion pivotably attached to the fixed portion at an end of the fixed portion. The rotating portion has a rotation axis in a connection direction between the mounting portion and the receiving portion. The piping hose is inside the structural body and arranged to connect an end of the fixed portion on a mounting portion side to the rotating portion. One of the piping hoses is connected to the end of the fixed portion via one corresponding fixed-portion-side joint and connected to the rotating portion via one corresponding rotating-portion-side joint. At least one of the fixed-portion-side joints and the rotating-portion-side joints is pivotable.

A position control device for a target plant includes a coefficient calculation unit that performs temporary operation of the target plant so as to reverse a direction of travel of the target plant with backlash compensation turned off and calculates a coefficient for reverse detection for each of a plurality of backlash portions, based on a position command value at a timing when a position deviation between a position detection value for a load end and the position command value increases rapidly, a reverse detection unit that operates the target plant with the backlash compensation turned on and detects a timing when a load-side transmission torque is reversed, based on the coefficient, the position command value, and a moment of inertia of the entire load, and a compensation value calculation unit that increases or decreases a backlash compensation value at the timing when reverse is detected.

A tool management system includes a tool management device and an information input/output unit. In the information input/output unit, the tool component and/or the assembled tool stored in the tool information database in which unique identification information is assigned is selectable together with a plurality of predetermined action patterns representing actual operations necessary for preparing an assembled tool used in machining. The tool management device includes a list generating unit and a data determining unit. The list generating unit automatically generates a preparation tool list including the selected tool component and/or assembled tool for each of the action patterns when the tool component and/or the assembled tool is selected together with each of the action patterns. The data determining unit determines whether the unique identification information of the actual tool component and/or assembled tool matches the unique identification information listed in the preparation tool list or not.

Provided is a tool post for machine tools, which is capable of mounting, on a turret, an actuator that is driven by forces of various fluids, such as hydraulic oil, air, and coolant, without an increase in size of the turret. On each of tool holder mounting surfaces 11 of a turret 2 , ends 23a and 42a of a plurality of fluid connection passages 23 and 42 configured to allow supply of fluid are made open. The turret 2 and a tool post body 3 are provided with fluid supply mechanisms 20 and 40 configured to supply fluid to the fluid connection passages 23 and 42 , respectively. An actuator, which uses fluid supplied through each of the fluid connection passages 23 and 42 as a driving source, is configured to be mountable on the turret 2 .

Provided is a cutting fluid tank for a machine tool, with which the operator's time and effort for cleaning are reduced and the maintainability is enhanced, without entailing an increase in size. In a tank body, a cutting fluid flow channel having a spiral shape and extending from a tank center region to a tank outer peripheral region is formed by a flow channel forming plate. An inflow port into which a cutting fluid from inside a machining chamber flows is provided at an outer peripheral region of the lid, whereas an outflow port to take out the cutting fluid in the tank body to an outside is provided at a center region of the lid. A pump to pump up and supply the cutting fluid to the machining chamber is provided at the outflow port.

A cell controller controls a machining cell including a plurality of work resources. The plurality of work resources include at least one processing machine and at least one robot. The cell controller includes a PLC and a management device. The PLC controls operation of the work resources in accordance with an instruction from the management device, and acquires conditions of a plurality of work elements including the work resources and a workpiece. The management device, in response to occurrence of abnormal stop of the machining cell, specifies a recoverable condition of each work element, and presents to an operator a guide to a recovery procedure that enables each work element to transition to the recoverable condition.