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To keep an electrode guide from interfering with an object such as a workpiece during the workpiece processing period, in the present invention, a path-generating device of an electrical discharge machine that is provided with an electrode guide for supporting a rod-shaped electrode is configured so as to be equipped with: a shape data-reading unit (51) for reading the initial shape of the workpiece prior to processing and a target shape of the workpiece; an electrode-path-generating section (53) for generating an electrode path for moving the electrode laterally on the basis of the target shape of the workpiece; and a guide path-generating section (54) for generating an electrode guide path, which avoids interference between the electrode guide and the workpiece, on the basis of the initial shape of the workpiece.


Patent
Makino Milling Machine Co. | Date: 2017-01-18

Provided is a feed shaft control method, wherein a speed feedback loop having a speed controller (72) is disposed within a position feedback loop having a position controller (71), forming a cascade coupling, and an acceleration feedback signal which is outputted from a compensator (91) on the basis of an output signal of an acceleration detector (60) is subtracted from a torque instruction (r). Furthermore, the method implements control wherein a speed is acquired on the basis of the output signal of the acceleration detector (60), and a signal obtained by multiplying the acquired speed by a gain (Ka3) is added to a speed instruction (r) which is outputted from the position controller (71).


Patent
Makino Milling Machine Co. | Date: 2016-09-07

A machine tool facility (10) includes the following: machine tools (100A, 100B); a first pallet stocker (300A) in which a plurality of pallets are arranged in parallel with a predetermined space therebetween; a second pallet stocker (300B) in which a plurality of pallets are arranged in parallel with a predetermined space therebetween, and which is disposed in parallel with the first pallet stocker; a conveyance car (200) that conveys a pallet (P) in a direction parallel to the row of the pallets (P) of the first pallet stocker (300A); a first transfer device (210) for transferring the pallet between the first pallet stocker (300A) and the conveyance car (200); and a second transfer device (400) for transferring, by horizontal movement, the pallet (P) between the first pallet stocker (300A) and the second pallet stocker (300B).


Patent
Makino Milling Machine Co. | Date: 2016-11-02

A control apparatus (10) for controlling a machine tool (20) on the basis of a machining program is provided with a program analysis unit (22) which analyzes an input machining program (30), a process table creation unit (26) which, on the basis of the results of the analysis by the program analysis unit (22), creates a process table that sequentially lists processes according to the execution flow of the machining program (30), and a display unit (28) which displays the process table created by the process table creation unit (26).


Patent
Makino Milling Machine Co. | Date: 2016-02-03

A worked surface of a workpiece is evaluated on the basis of how the surface is actually perceived by a persons (observers) eyes (vision) or fingers (touch), and a work process whereby a workpiece is worked is changed on the basis of the evaluation.


Patent
Makino Milling Machine Co. | Date: 2016-11-02

This control device (70) for a machine tool (11) has a display unit (28) that displays an input screen via which machining information regarding machining to be performed on a workpiece is inputted and an input unit via which letters and/or numbers are inputted into machining-information fields on the input screen. When a machining-information field on the input screen is selected, the display unit (28) displays a first input-assistance screen corresponding to said field. Input-support buttons are laid out on said first input-assistance screen. When an input-support button is pressed, a second input-assistance screen is displayed, and via an operation performed in accordance with said second input-assistance screen, the aforementioned field is filled in.


Patent
Makino Milling Machine Co. | Date: 2016-05-04

The main spindle device for a machine tool is provided with: a bearing for rotatably supporting the main spindle; a bearing case for holding the bearing; a housing inside which the bearing case is disposed; and a stiffness-switching device, which supports the bearing case with respect to the housing and is able to switch the stiffness of the bearing case support between multiple levels. When the stiffness-switching device is supporting the bearing case at a low stiffness, the main spindle device is formed so that the bearing case slides with respect to the housing. A friction member is disposed on the area where the bearing case slides with respect to the housing.


A toolpath evaluation method for evaluating a toolpath traveled by a rotating tool (T) when the rotating tool (T) machines a workpiece (W) while moving relative to the workpiece (W), said toolpath evaluation method including: a calculation step for, based on a predetermined target toolpath (R1) and the shape of the workpiece (W) before the workpiece (W) is machined by moving the rotating tool along the target toolpath (R1), calculating the dimensions of a contact area (AT) of the bottom surface portion (TB) of the rotating tool where the bottom portion (TB) is predicted to be in contact with the workpiece (W) when the workpiece (W) is actually machined by moving the rotating tool along the target toolpath (R1), said bottom surface portion (TB) intersecting the rotational axis line of the tool; and a determination step for determining that the target toolpath (R1) is inappropriate if the dimensions of the contact area (AT) exceed predetermined threshold values when the rotating tool is positioned at any location along the target toolpath (R1).


Patent
Makino Milling Machine Co. | Date: 2016-07-20

The feed rod device of a machine tool is equipped with first and second planetary gear speed reducers (60, 80), each of which is obtained from an inner element (62, 82), outer element (64, 84), and intermediate elements (66, 68, 86, 88, 90) that are disposed between the two, the elements being disposed so as to be mutually rotatable and combined in series so that one of the three elements is a fixed section, one of the two remaining elements is the input section and the other is the output section. The element that is the input section of the first speed reducer (60) and the element that is the input section of the second speed reducer (80) are connected to a single drive source (Ma). The element that is the output section of the first speed reducer (60) and the element that is the output section of the second speed reducer (80) are connected to form a single output section. The feed rod device is provided with an actuator (M), which variably applies a rotational torque on the fixed section of the first speed reducer (60) and/or the fixed section of the second speed reducer (80).


Patent
Makino Milling Machine Co. | Date: 2016-01-13

A working machine feed axis control device: disposes a velocity feedback loop and forms a cascade coupling on the inner side of a location feedback loop; comprises a velocity gain setting apparatus (30) which multiplies the output of the velocity feedback look by a first gain (kv), and a location gain setting apparatus (31) which multiplies the output of the location feedback loop by a second gain (kp); subtracts the output of the velocity gain setting apparatus (30) and the output of the location gain setting apparatus (31) from a torque instruction (); and outputs the remaining torque instruction () to a subject to be controlled (27).

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