A non-contact power supply device 400 which supplies power to a tool holder 200 in a non-contact manner comprises: a first device 500 that has a magnetic field generation unit; and a second device 600 that has a power generation unit. The second device 600 is attached to the tool holder 200. When power is supplied to the tool holder 200, the first device 500 which is held by a holding member 730 of a holding device 700 is moved from the holding member 730-side toward a holding member 171 which is provided to a main shaft housing 160. When there is no need to supply power to the tool holder 200, the first device 500 which is held by the holding member 171 is moved from the holding member 171-side to the holding member 730-side.
B23Q 5/04 - Driving main working members rotary shafts, e.g. working-spindles
B23B 19/02 - Working-spindlesFeatures relating thereto, e.g. supporting arrangements
B23Q 3/12 - Devices holding, supporting, or positioning, work or tools, of a kind normally removable from the machine for securing to a spindle in general
H02J 50/10 - Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
A non-contact power supply device 400 that is to supply power to a tool holder 200 in a non-contact manner comprises a first device 500 that is provided to a spindle housing 150 and a second device 600 that is provided to the tool holder 200. The first device 500 has a magnetic field generation unit 510 that includes a permanent magnet 511. The second device 600 has a power generation unit that includes first, second, and third cores 610, 620, 630 and a coil 640. The first core 610 and the second core 620 are provided opposite each other in the axial direction such that pluralities of first protruding pieces 612 and second protruding pieces 622 alternate in the circumferential direction. The third core 630 is provided between the first core 610 and the second core 620 inside the first protruding pieces 612 and the second protruding pieces 622. The coil 640 is wound around the outer circumference of the third core 630.
B23Q 5/04 - Driving main working members rotary shafts, e.g. working-spindles
B23B 19/02 - Working-spindlesFeatures relating thereto, e.g. supporting arrangements
B23Q 3/12 - Devices holding, supporting, or positioning, work or tools, of a kind normally removable from the machine for securing to a spindle in general
H02J 50/10 - Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
3.
AUTOMATIC ATTACHMENT/DETACHMENT DEVICE OF TRANSMISSION COIL UNIT IN CONTACTLESS POWER FEED DEVICE
[Problem] To allow quick and easy attachment/detachment of a transmission coil unit, and to prevent the transmission coil unit from interfering with other tasks. [Solution] An automatic attachment/detachment device 10 comprises: a bracket member 42; a stand member 44; an adapter member 46; a linear drive mechanism 48; and a power supply mechanism 50. The bracket member 42 is provided to a main shaft housing 20, and the stand member 44 is disposed at an avoidance position S where interference with a task related to a toolholder 24, such as an exchange task by an ATC, is avoided. The adapter member 46 is provided with a transmission coil unit 30, and the adapter member 46 can be freely linked alternately to the bracket member 42 and the stand member 44.
B23B 29/034 - Boring heads with tools moving radially, e.g. for making chamfers or undercuttings
B23Q 3/12 - Devices holding, supporting, or positioning, work or tools, of a kind normally removable from the machine for securing to a spindle in general
B23Q 3/155 - Arrangements for automatic insertion or removal of tools
B23Q 5/04 - Driving main working members rotary shafts, e.g. working-spindles
B23Q 17/00 - Arrangements for indicating or measuring on machine tools
4.
WORKING MACHINE BEARING QUALITY DETERMINING METHOD AND SYSTEM
[Problem] To enable the quality of a bearing to be determined accurately using a simple process and configuration. [Solution] This method includes: a step for detecting rotational vibration of a bearing; a step for obtaining a vibration frequency by analyzing the rotational vibration by means of Fourier series expansion; a step for dividing the vibration frequency into a total SRF and a residual frequency; and a step for determining the quality of the bearing by comparing the total SRF and the residual frequency.
A noncontact power supply device 10 is provided with a power transfer coil unit 56 attached to a spindle housing 20 and a power receiving coil unit 58 arranged on the outer peripheral surface of a tool holder 26, and supplies energy in a noncontact manner to an actuator 36 housed in a body part 32 of the tool holder 26.
The present invention includes: a step for detecting machining vibrations during machining; a step for analyzing the machining vibrations through Fourier series expansion so as to obtain a machining frequency; a step for extracting, from the machining frequency, a total sum TPF that is the total sum of a tool passage frequency and a harmonic thereof and a total sum SRF that is the total sum of a main shaft rotation frequency and a harmonic thereof; and a step for making a comparison between the total sum TPF and the total sum SRF so as to determine whether or not a rotation tool is damaged.
G05B 19/18 - Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form
B23Q 17/00 - Arrangements for indicating or measuring on machine tools
B23Q 17/09 - Arrangements for indicating or measuring on machine tools for indicating or measuring cutting pressure or cutting-tool condition, e.g. cutting ability, load on tool
7.
METHOD AND SYSTEM FOR MONITORING MACHINING STATE OF WORK MACHINE
A method for monitoring the machining state of a work machine includes: a step for detecting, over time, machining vibrations during rotation caused by a rotating tool; a step for acquiring machining frequencies by sequentially analyzing the detected machining vibrations by Fourier series expansion; a step for sorting the machining frequencies into an idling frequency, a fundamental wave, a high frequency, a residual frequency, or a chatter frequency at which regenerative chattering occurs; a step for setting different display colors for the frequencies, respectively; and a step for displaying the strength of the machining vibrations detected over time, in a color-coded integrated display window in a color-coded manner with the display colors corresponding to the machining frequencies acquired from the machining vibrations, respectively, and monitoring the machining state of the workpiece.
B23Q 17/12 - Arrangements for indicating or measuring on machine tools for indicating or measuring vibration
G05B 19/18 - Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form
The present invention comprises: a step for detecting working vibrations at the time of working; a step for obtaining a working frequency by analyzing the working vibrations using a Fourier series expansion; a step for dividing the working frequency into a tool passing frequency and a residual frequency; and a step for monitoring the working state by comparing the tool passing frequency and the residual frequency and displaying the results of the comparison.
B23Q 17/12 - Arrangements for indicating or measuring on machine tools for indicating or measuring vibration
B23Q 15/12 - Adaptive control, i.e. adjusting itself to have a performance which is optimum according to a preassigned criterion
B23Q 17/09 - Arrangements for indicating or measuring on machine tools for indicating or measuring cutting pressure or cutting-tool condition, e.g. cutting ability, load on tool
G01M 99/00 - Subject matter not provided for in other groups of this subclass
G05B 19/18 - Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form
The present invention makes it possible to maintain the balance of a rotating body with high precision while the rotating body rotates at high speed. A chatter-preventing structure (10) includes a housing member (28) that is fixed, with respect to a tool holder (20), to the outer periphery of the rear end portion of a tool attachment part (24), and rotates together with the tool holder (20). An annular damper chamber (34) is formed within the housing member (28) and accommodates a divided ring-like friction damper part (36) in a manner that allows orbital movement thereof, said ring-like friction damper part (36) absorbing, by sliding friction, vibration energy that contributes to chatter during machining of a workpiece (W).
B23B 27/00 - Tools for turning or boring machinesTools of a similar kind in generalAccessories therefor
B23Q 11/00 - Accessories fitted to machine tools for keeping tools or parts of the machine in good working condition or for cooling workSafety devices specially combined with or arranged in, or specially adapted for use in connection with, machine tools
F16F 7/06 - Vibration-dampersShock-absorbers with relatively-rotatable friction surfaces that are pressed together in a direction perpendicular or inclined to the axis of rotation
F16F 15/129 - Suppression of vibrations in rotating systems by making use of members moving with the system using elastic members or friction-damping members, e.g. between a rotating shaft and a gyratory mass mounted thereon characterised by friction-damping means
This machine tool 10 with a position correction function is provided with: a tool holder 20; a tool attachment part 26 installed so as to be able to move in a radial direction intersecting with a rotation axis direction of the tool holder 20, and to which a boring bar 28 is attached; and an adjustment device 42 built into the tool holder 20 and correcting the position of the tool attachment part 26 in the radial direction. The adjustment device 42 is provided with an actuating member 44, a rotary shaft member 46, a first pinion member 48A, a second pinion member 48B, a first rack member 50A, and a second rack member 50B.
This vibration monitoring method has a step for displaying the number of times a tool passing frequency (TPF) peak that is the peak acceleration at a tool passing frequency has exceeded a TPF threshold value in a display column 56a of a total threshold crossing display part 56, a step for displaying the number of times harmonic TPF peaks at harmonic frequencies have exceeded harmonic TPF threshold values in display columns 56b–56d of the total threshold crossing display part 56, and a step for displaying a comparison of the number of TPF threshold crossings and the number of harmonic TPF threshold crossings in a variation display part 58.
G01H 17/00 - Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves, not provided for in the other groups of this subclass
B23Q 17/09 - Arrangements for indicating or measuring on machine tools for indicating or measuring cutting pressure or cutting-tool condition, e.g. cutting ability, load on tool
G01M 99/00 - Subject matter not provided for in other groups of this subclass
12.
WORKING MACHINE WITH POSITION CORRECTION FUNCTION AND POSITION CORRECTION METHOD THEREFOR
The working machine 10 with a position correction function is equipped with a tool holder 20, a tilting member 26, an outer peripheral ring member 40, and a conversion mechanism 44. The tilting member 26 is mounted via a support pin 28 so as to be able to tilt in a radial direction of the tool holder 20, is positioned inside the tool holder 20, and is provided with an engagement part 38. The conversion mechanism 44 is disposed between the outer peripheral ring member 40 and the engagement part 38, and converts the rotational motion of the outer peripheral ring member 40 into a tilting motion in a radial direction of the tilting member 26.
This method for monitoring a work state includes: a step for comparing a TPF peak, which is the peak acceleration in a tool passage frequency, with a TPF threshold value and causing a TPF display field (56a) to display the number of times the TPF threshold value was exceeded; a step for comparing an f0 peak, which is the peak acceleration in a natural frequency, with an f0 threshold value and causing a natural frequency display field (56b) to display the number of times the f0 threshold value was exceeded; and a step for comparing the number of times the TPF threshold value was exceeded and the number of times the f0 threshold value was exceeded and causing a change display unit (58) to display the result.
A chatter suppression method for an operating machine detects vibration generated when rotation of a turning tool (22) or a work piece (W) starts, and when the vibration detected from the rotation start time is determined to exceed a vibration threshold value during idling of the machine main shaft, the vibration is analyzed using Fourier series expansion and the frequency due to regenerative chatter is calculated, and an estimated damping ratio is further added to the frequency due to the regenerative chatter to obtain a regenerative chatter avoidance frequency in order to adjust the speed of the main shaft (18).
B23Q 15/12 - Adaptive control, i.e. adjusting itself to have a performance which is optimum according to a preassigned criterion
B23Q 17/12 - Arrangements for indicating or measuring on machine tools for indicating or measuring vibration
G05B 19/404 - Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form characterised by control arrangements for compensation, e.g. for backlash, overshoot, tool offset, tool wear, temperature, machine construction errors, load, inertia
15.
WORKING APPARATUS HAVING POSITION CORRECTION FUNCTION
A tool holder (20) which is a component of a machine tool (10) has a base part (22) fixed to a spindle (16), a tool attachment part (26) for attaching a tool, e.g., a boring bar (24), an elastically deformable portion (28) which connects the base part (22) and the tool attachment part (26), a working axle member (30) which is radially movable across the direction of rotation of the spindle (16) relative to the tool holder (20), a translation mechanism (32) capable of translating the motion of the working axle member (30) into a tilting motion of the tool attachment part (26) with respect to the direction of axle, and an actuator (34) which drives the working axle member (30) in the radial direction.
A machine tool (10) comprises a tool holder (20) which can rotate integrally with a spindle (16), a ring-shaped elastic holder (24) having one end being bonded to the tool holder (20) and the other end being provided with an open end (24a) to which blade tools (22a, 22b) are attached, an operation shaft member (26) having the end projecting axially outward of the elastic holder (24) and movable in the axial direction relative to the tool holder (20), a transformation mechanism (28) which is linked with the operation shaft member (26) and transforms the moving operation thereof into the enlarging/contracting operation of the open end (24a) in the radial direction, and a moving mechanism (30) which moves the operation shaft member (26) in the axial direction.
Disclosed is a method for suppressing chattering of a work machine comprising a step (S1) of detecting vibration occurring when the rotation of a bit or a work (W) is started, a step (S3) of determining whether or not the vibration detected after the time when the rotation is started exceeds a threshold, a step (S4) of analyzing the vibration by Fourier series expansion when the vibration is determined to have exceeded the threshold, and a step (S21) of adjusting the rotational speed of the spindle.
B23Q 15/12 - Adaptive control, i.e. adjusting itself to have a performance which is optimum according to a preassigned criterion
B23Q 17/12 - Arrangements for indicating or measuring on machine tools for indicating or measuring vibration
G05B 19/404 - Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form characterised by control arrangements for compensation, e.g. for backlash, overshoot, tool offset, tool wear, temperature, machine construction errors, load, inertia
[PROBLEMS] To perform position correction of a tool fixed to a tool holder with high precision of micron order in the radial direction of the tool holder through simple constitution and control. [MEANS FOR SOLVING PROBLEMS] The working machine includes a tool holder (20) rotatable integrally with a spindle (16), a resilient holder portion (24) of a ring shape having one end bonded to the tool holder (20) and the other end for fixing blade tools (22a, 22b), a working shaft member (26) having an end projecting axially outward of the resilient holder portion (24) and rotatable relatively to the tool holder (20), a conversion mechanism (28) for changing the rotary operation of the working shaft member (26) into radial enlarging/shrinking operation of the resilient holder portion (24), and a support mechanism (72) arranged on the outside of the tool holder (20) and coupled with the working shaft member (26) in order to rotate it relatively to the tool holder (20).
[PROBLEMS] A work machine in which a tool attached to a tool holder performs highly accurate work. This is achieved by adapting the tool holder to be adjustable in the radial direction and by preventing a change in centrifugal force as much as possible. [MEANS FOR SOLVING PROBLEMS] An annular elastic holder part (24) having one end secured to the tool holder (20) and the other end forming an open end (24a) is attached to the tool holder (20). Two or more tools, such as semi-finishing blades (26a, 26b) and finishing blades (28a, 28b), are fitted to the open end (24a). A pressing mechanism (32) is installed in the tool holder (20), and the pressing mechanism (32) moves forward and backward in the axial direction of the tool holder (20) to press the annular elastic holder part (24), deforming the open end (24a) into an elliptic shape. When the opening end (24a) is deformed in the elliptic shape, the semi-finishing blades (26a, 26b) move radially inward and the finishing blades (28a, 28b) move radially outward.
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