Dmg Mori Company Limited

Mori Seiki Co., Ltd.

Dmg Mori Seiki Co., Ltd.

Nikon Corporation

Shizuo Nishikawa

Hiroki Nakao

Katsuhiko Ono

Hisayoshi Morita

Kengo Kawai

Koji Iiyama

Makoto Fujishima

Satoshi Miyamoto

Masataka Sakamoto

Morihiro Hideta

Ryuichi Fujiwara

Kingo Maeda

Masahiro Komatsu

Yuichi Nakazawa

Akio Karyu

Tomoaki Yamada

Masahiro Shimoike

Masanori Murozumi

Masami Yabuta

Kenichiro Ueno

Yasuhiko Morita

Sosuke Sakamoto

Keizo Kashihara

Norihiro Kumagai

Shuji Komatsu

Junichi Morishita

Ryo Murakami

A machine tool includes: a display; a tool configured to machine a workpiece; a spindle configured to rotate the tool or the workpiece; a sensor configured to detect a vibration frequency of the spindle or the tool; and a processor configured to control the machine tool. The processor is configured to: detect a chatter vibration in the spindle or the tool based on the vibration frequency; based on a frequency of the chatter vibration, a rotation speed of the spindle, and the number of cutting edges of the tool, calculate an order corresponding to the number of vibrations of the tool during a period of time until a current rotation angle of a first cutting edge of the tool reaches a current rotation angle of a second cutting edge of the tool; and present order information on the display, the order information indicating a magnitude of the calculated order.

Machine tool, method for controlling machine tool, and computer-readable storage medium storing program for controlling machine tool

A processing system includes a control unit that generates positional information related to a position of a measuring unit at a time of measuring a processing object and outputs the generated positional information and a generation period signal indicating a period during which the positional information is generated, an acquisition unit that acquires the positional information and the generation period signal which have been output, an acquisition interval calculation unit that calculates a statistical value indicating an interval between acquisition periods regarding a plurality of generation period signals acquired by the acquisition unit, an estimation unit that estimates the period during which the positional information is generated on the basis of the statistical value calculated by the acquisition interval calculation unit, and a shape calculation unit that calculates a shape of the processing object based on measurement information, the positional information, and the period estimated by the estimation unit.

Processing system, measuring probe, shape measuring device, and program

Provided is a machine tool () which is capable of measuring machining accuracy of a workpiece (W) with high accuracy and enables the time required from machining to measurement of machining accuracy to be greatly reduced. The machine tool () machining a workpiece (W) while moving a tool and the workpiece (W) relative to each other includes a cover () separating from outside a machining area for machining the workpiece (W) therein, and temperature adjusting means () used in machining of the workpiece (W) to adjust an ambient temperature of the machining area.

Machine tool

A machining condition determining apparatus () includes a first setter () setting a cutting speed of a cutting tool, a storage () storing a maximum output value of a drive motor rotating a spindle holding the cutting tool and a number of revolutions of the drive motor corresponding to the maximum output value, a number-of-revolutions determiner () obtaining a steady-state value of the maximum output value of the drive motor stored in the storage () and determining a number of revolutions of the drive motor corresponding to the obtained steady-state value of the maximum output value, and a tool-diameter determiner () calculating a tool diameter of the cutting tool based on the cutting speed set by the first setter () and the number of revolutions of the drive motor determined by the number-of-revolutions determiner ().

Machining condition-determining device and cutting tool selection apparatus

A machining state display apparatus includes an achievement degree data storage () storing machining condition data relating to each of sets of machining conditions and achievement degree data relating to degrees of achievement of evaluation items to be obtained in machining under each of the sets of machining conditions, with the machining condition data and the achievement degree data being associated with each other, a display part () displaying a set of machining conditions and degrees of achievement of the evaluation items corresponding thereto on a display (), and an input part () inputting a signal for selecting one from the evaluation items and a required degree of achievement for the selected evaluation item. The display part () recognizes, based on the selected evaluation item and the required degree of achievement, a set of machining conditions corresponding to the required degree of achievement for the selected evaluation item as well as the degrees of achievement of other evaluation items to be obtained under the set of machining conditions by referring to the achievement degree data storage (), and displays the recognized degrees of achievement on evaluation-item basis and displays the recognized set of machining conditions.

Machining state display apparatus

A machining management apparatus includes a tool information storage storing therein information relating to each cutting tool used in a machine tool and storing therein a coefficient n and a coefficient C in a tool life equation corresponding to tool life influencing factors including at least a workpiece and a cutting tool material, and an adapted cutting speed calculator executing a machining condition receiving processing of receiving information on the tool life influencing factors and information on a desired cutting speed, a coefficient recognition processing of recognizing the coefficient n and the coefficient C corresponding to the tool life influencing factors by referring to the tool information storage based on the received tool life influencing factor information, and a cutting speed calculation processing of calculating a cutting speed adapted to the desired cutting time according to the tool life equation based on the recognized coefficient n and coefficient C.

Machining management apparatus

A machining status display apparatus includes a display device having a display screen, a stability lobe picture creator creating, based on specifications of a tool to be used, display picture data for displaying a stability lobe as a correlation diagram between a spindle rotation speed and a limit depth of cut of the tool above which regenerative chatter occurs, a first machining information picture creator creating display picture data for displaying machining related information other than regenerative chatter corresponding to set machining conditions, and a display controller displaying the stability lobe and the machining related information with the stability lobe and the machining related information superimposed one on another on the display screen of the display device based on the display picture data created by the stability lobe picture creator and the display picture data created by the first machining information picture creator.

Machining status display apparatus

A machining status display apparatus includes an achievement degree data storage storing achievement degree data relating to a degree of achievement of each of predetermined machining-related evaluation items within a range determined by attainable maximum and minimum values of the evaluation item and storing the degrees of achievement of the evaluation items obtained under each of predetermined sets of machining conditions in association with the set of machining conditions, a display part displaying the degrees of achievement of the evaluation items corresponding to a selected set of machining conditions by referring to the data in the achievement degree data storage, and an input part inputting a selection signal for selecting a set of machining conditions. The display part displays the degrees of achievement of the evaluation items obtained under the set of machining conditions corresponding to the selection signal by referring to the data in the achievement degree data storage.

Machining status display apparatus, and NC program generating apparatus and NC program editing apparatus provided with the same

A method for adjusting the volume of the combustion chamber of an engine with high accuracy is provided. A cylinder head () of an engine includes a recess () constituting part of the combustion chamber of the engine, and a mating surface () for a cylinder block. The method for adjusting the volume of the combustion chamber includes measuring a plurality of portions of the surface of the recess () and a plurality of portions of the mating surface () by using a displacement meter, calculating differences between the respective measurement values of the mating surface (), and the design shape of the mating surface () in a state in which the design shape of the surface of the recess () is fitted with respect to the respective measurement values of the recess (), and deciding the cutting amount of the mating surface () based on the calculated differences and cutting the mating surface () by the decided cutting amount.

Method for adjusting volume of combustion chamber of engine

In order to adjust the volume of the combustion chamber with high accuracy, a cylinder headincludes a recessconstituting part of the combustion chamber of the engine and a mating surface for a cylinder block. The recessincludes a plurality of openings to which a plurality of specific members are attached respectively. The mating surfaceis formed to have a cutting stock with respect to three-dimensional shape data of the cylinder headdesigned to have a target combustion chamber volume. The adjusting method further comprises measuring the surface shape of the recess and the shape of the mating surface around the recess by successively changing the irradiation position of a laser beam using a line laser displacement meter. The adjusting method further comprises removing data of regions equivalent to the plurality of openings from measurement data by comparing the measurement data obtained by the line laser displacement meter with the three-dimensional shape data. The adjusting method still further comprises: calculating the volume of the recessbased on the measurement data from which the regions equivalent to the plurality of openings are removed; and deciding the cutting amount of the mating surfaceby comparing the calculated volume of the recesswith a volume of the recessbased on the three-dimensional shape data.

The present invention relates to a machining system etc. capable of highly accurately machining a workpiece even in a case where the workpiece is deflected. A machining systemis configured with a lathehaving end portion supporting mechanismsfor supporting both end portions of an elongated workpiece W horizontally, a tool restfor holding a tool, a feed mechanism for moving the tool restin three orthogonal directions, and a control devicefor controlling the feed mechanism, and a non-contact measuring devicefor measuring the deflection shape of the workpiece W when the workpiece W is rotated. The control devicemoves the tool along the deflection shape measured by the non-contact measuring device

Machining method and machining system

A workpiece measuring apparatus has an external module provided outside an NC device to acquire position data of one or more movable axes of a movable unit having a measuring head attached thereto. The position data of the measuring head is acquired at the same time interval as that for the distance measurement by the measuring head. The position of the workpiece is acquired by calculation from the acquired distance measurement data and the position data of the measuring head. The continuous shape of the workpiece can be measured by performing continuous measurement while moving the measuring head. Therefore, no modification or change is required such as adding a new function to the NC device. In addition, the present invention is applicable to any machine tool equipped with an NC device of any configuration, without being restricted by constraints of the NC device.

Apparatus for and method of measuring workpiece on machine tool

A machining systemcomprises a lathehaving end portion supporting mechanismsfor supporting an elongated workpiece W horizontally, center restsfor supporting the middle portion of the workpiece W, an adjustment mechanism for adjusting the supported position of the workpiece W by adjusting the height positions of the center rests, a tool rest, and a control device, and a non-contact measuring devicefor measuring the deflection amount of the workpiece W at portions thereof supported by the center restswhen the workpiece W is rotated. The control deviceis configured to adjust the height positions of the center restsby controlling the adjustment mechanism on the basis of the measured deflection amount, so that the height positions of both end portions of the workpiece W being rotated and the middle portion thereof become the same.

A workpiece measuring apparatus includes a programmable controller which acquires positional data of a measuring head. At the same time that the programmable controller acquires the positional data, a pulse output unit outputs timing pulses. The measuring head measures a workpiece on a machine tool according to a measurement command which is output positively earlier than the timing of predetermined time intervals by a time difference which is preset by a predictive system. As a result, a first time at which the programmable controller acquires the positional data of the measuring head and a second time at which the measuring head measures the workpiece in response to the measurement command synchronize. The workpiece measuring apparatus is capable of measuring the workpiece highly accurately in a three-dimensional space according to a minimum required amount of measured data without the need for modifying an existing NC apparatus combined with the machine tool.

Relative movement in X, Y and Z axis directions is made between a main spindle and a tablefor application in a machine tool in which a work is machined. An emitting elementfor irradiating laser beamand a photosensitive elementare disposed on the table. A measuring toolwith its top end being shaped as a cone form is attached to the main spindle. The laser beamis interrupted with the cone form portionof the measuring toolthrough relative movement between the tableand measuring toolbefore and after machining a work. Detection signal of interruption is generated at the moment of interruption, position is detected, operation processing is performed so that difference in X, Y and Z axes before and after machining is obtained along with values for correction. Positional coordinate values for three axis directions are detected simultaneously with a measuring device of a simple constitution by use of laser beam and values for correction such as of thermal displacement is obtained by operation processing of displacement values.

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Nara, Japan

Shizuo Nishikawa