WO2016042874A1 - 工作機械およびブレーキチェック方法 - Google Patents
工作機械およびブレーキチェック方法 Download PDFInfo
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- WO2016042874A1 WO2016042874A1 PCT/JP2015/067859 JP2015067859W WO2016042874A1 WO 2016042874 A1 WO2016042874 A1 WO 2016042874A1 JP 2015067859 W JP2015067859 W JP 2015067859W WO 2016042874 A1 WO2016042874 A1 WO 2016042874A1
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- WIPO (PCT)
- Prior art keywords
- brakes
- brake
- ball screw
- drive motor
- machine tool
- Prior art date
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q17/00—Arrangements for observing, indicating or measuring on machine tools
- B23Q17/007—Arrangements for observing, indicating or measuring on machine tools for managing machine functions not concerning the tool
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q15/00—Automatic control or regulation of feed movement, cutting velocity or position of tool or work
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q5/00—Driving or feeding mechanisms; Control arrangements therefor
- B23Q5/22—Feeding members carrying tools or work
- B23Q5/34—Feeding other members supporting tools or work, e.g. saddles, tool-slides, through mechanical transmission
- B23Q5/38—Feeding other members supporting tools or work, e.g. saddles, tool-slides, through mechanical transmission feeding continuously
- B23Q5/40—Feeding other members supporting tools or work, e.g. saddles, tool-slides, through mechanical transmission feeding continuously by feed shaft, e.g. lead screw
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q5/00—Driving or feeding mechanisms; Control arrangements therefor
- B23Q5/54—Arrangements or details not restricted to group B23Q5/02 or group B23Q5/22 respectively, e.g. control handles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q5/00—Driving or feeding mechanisms; Control arrangements therefor
- B23Q5/54—Arrangements or details not restricted to group B23Q5/02 or group B23Q5/22 respectively, e.g. control handles
- B23Q5/58—Safety devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D66/00—Arrangements for monitoring working conditions, e.g. wear, temperature
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
- F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
- F16H25/20—Screw mechanisms
- F16H25/22—Screw mechanisms with balls, rollers, or similar members between the co-operating parts; Elements essential to the use of such members
- F16H25/2204—Screw mechanisms with balls, rollers, or similar members between the co-operating parts; Elements essential to the use of such members with balls
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
- F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
- F16H25/20—Screw mechanisms
- F16H25/24—Elements essential to such mechanisms, e.g. screws, nuts
- F16H25/2454—Brakes; Rotational locks
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2121/00—Type of actuator operation force
- F16D2121/18—Electric or magnetic
- F16D2121/20—Electric or magnetic using electromagnets
Definitions
- the present invention relates to a machine tool and a brake check method thereof.
- Patent Document 1 discloses a technique for setting the speed command to the servo motor to 0 at the same time that the ball screw is braked when the power supply is stopped.
- Patent Document 2 describes a mechanism for preventing a fall due to its own weight when the power is turned off by an electromagnetic brake.
- Patent Document 3 discloses a brake motor that stops the rotation of the motor shaft when power is not supplied.
- Patent Document 4 discloses a technique for braking the gravity axis by delaying the power interruption command and first controlling the brake device.
- An object of the present invention is to provide a technique for solving the above-described problems.
- a machine tool provides: A ball screw extending vertically, A drive motor for rotationally driving the ball screw; A movable part that moves up and down along the ball screw according to the rotation of the ball screw by the drive motor; At least two brakes for preventing lowering of the movable part during power supply stop to the drive motor; A brake control unit for releasing at least one of the at least two brakes when power supply to the drive motor is stopped; Detecting the presence or absence or fall distance of the movable part due to the release of the at least one brake, and detecting a malfunction of the brake not released among the at least two brakes; Equipped with.
- the method according to the present invention comprises: A ball screw extending vertically, A drive motor for rotationally driving the ball screw; A movable part that moves up and down along the ball screw according to the rotation of the ball screw by the drive motor; At least two brakes for preventing lowering of the movable part during power supply stop to the drive motor; A brake check method for a machine tool equipped with A brake control step of releasing at least one of the at least two brakes while stopping power supply to the drive motor; A detection step of detecting a falling distance of the movable part due to the release of the at least one brake and detecting a malfunction of the brake that is not released among the at least two brakes; including.
- a brake failure can be detected more reliably in a mechanism that stops the rotation of the vertical axis with at least two brakes.
- the drive mechanism unit 100 of the machine tool includes a ball screw 101, a rotor 102, a movable unit 103, at least two brakes 104 and 105, a brake control unit 106, and a failure detection unit 107.
- a brake built-in motor including a rotor 102 and a brake 104 is shown.
- the ball screw 101 extends in the vertical direction, and when the rotor 102 rotationally drives the ball screw 101, the movable portion 103 moves up and down along the ball screw 101 according to the rotation of the ball screw 101.
- a configuration in which the rotor 102 is connected to the ball screw 101 via the toothed belt 108 is illustrated, but the present invention is not limited to this.
- a configuration in which a drive motor is directly connected to a ball screw via a joint may be used.
- the at least two brakes 104 and 105 are mechanisms that prevent the movable part 103 from descending when power supply to the drive motor is stopped. The reason why a plurality of brakes are attached to one shaft is to provide redundancy for the safety function of preventing falling.
- the brake control unit 106 causes at least two brakes 104 and 105 to function one by one when power supply to the drive motor is stopped. It is a normal operation to operate a plurality of brakes “all” “simultaneously”, and the purpose of releasing at least one brake is to check the function of the brake.
- the brake control unit 106 leaves all of the remaining ones out of at least two brakes. For example, if there are three brakes, two are released, and if there are four brakes, three are released.
- the brake control unit 106 stops power supply to the rotor 102 and then releases at least one of the at least two brakes when shutting off the power supply of the drive mechanism unit 100 of the machine tool. . That is, the brake 104 or the brake 105 is inspected when the power of the drive mechanism 100 of the machine tool is shut off.
- FIG. 1A shows a state where the brake 105 is released while operating the brake 104 to prevent rotation of the shaft of the rotor 102. In this state, when the movable unit 103 falls, the failure detection unit 107 can determine that the brake 104 is defective.
- FIG. 1B shows a state in which the brake 104 is released while operating the brake 105 to prevent the ball screw 101 from rotating. In this state, when the movable unit 103 falls, the failure detection unit 107 can determine that the brake 105 has a failure.
- the malfunction detection unit 107 detects whether or not the movable unit 103 has fallen or the fall distance due to the function of at least two brakes 104 and 105 one by one, and malfunctions of the at least two brakes 104 and 105. Is detected. That is, when the movable unit 103 falls or when the distance is a predetermined distance or more, it is detected that the brakes 104 and 105 are defective, and the user is notified.
- FIG. 2A is a view for explaining an external configuration of the drive mechanism unit 200 of the machine tool according to the present embodiment
- FIG. 2B is a cross-sectional view showing an internal configuration of the drive mechanism unit 200 of the machine tool
- FIG. FIG. The drive mechanism 200 of the machine tool according to the present embodiment is different from the first embodiment in that it has a ball screw, an electromagnetic brake, and a drive motor on the same axis.
- the drive motor 221 does not incorporate an electromagnetic brake, and the two electromagnetic brakes 105 and 224 are both attached to the outside of the drive motor 221.
- a housing 202 is provided coaxially with respect to the ball screw 101, and an electromagnetic brake 105 is provided between the housing 202 and the ball screw 101.
- the movable portion 203 is coupled to the ball nut 231 and moves up and down along the ball screw 101.
- the brake control unit 106 controls the power supply to the two electromagnetic brakes 105 and 224 inside and outside the housing 202 to cause the electromagnetic brakes 105 and 224 to function one by one.
- the coupling 226 couples the ball screw 101 and the drive motor shaft.
- An electromagnetic brake 224 is provided under the coupling 226.
- the housing 202 is a box for mounting the drive motor 221, and the electromagnetic brake 224 and the coupling 226 are contained in this box.
- the encoder 225 is attached (built in) to the drive motor 221 and functions as a rotation amount detector that detects the rotation amount.
- the movable part 203 is coupled to the ball nut 231. Furthermore, the defect detection unit 107 determines the presence or absence of a defect based on the number of rotations detected by the encoder 225. That is, when the state in which only the electromagnetic brake 105 is operated or the state in which only the electromagnetic brake 224 is operated is intentionally generated and the electromagnetic brakes 105 and 224 are functioned one by one, the ball screw 101 is rotated. Detect whether or not there is. If the ball screw 101 is rotated, it is determined that any of the electromagnetic brakes 105 and 224 is defective, and maintenance by a specialized operator is performed.
- FIGS. 3 and 4 are diagrams for explaining the configuration of the electromagnetic brakes 105 and 224.
- FIG. FIG. 3 is an exploded view of the electromagnetic brake 105
- FIG. 4 is a functional explanatory diagram.
- the brakes shown in FIGS. 3 and 4 are either in a fixed state or in an open state depending on whether the rotating disk (upper magnet) attracts or repels the coil.
- the tip of the ball screw 101 is fixed to the gear 301.
- the gear 301 meshes with a disk-shaped magnet 302.
- the magnet 302 rotates together with the ball screw 101.
- a coil 303 is provided on the lower side of the magnet 302 in the figure. By supplying electric power to the coil 303, the magnet 302 is slightly separated from the coil 303 and the ball screw 101 can be rotated (in FIG. 4). Upper state 401).
- the electromagnetic brake in FIG. 5A does not have a structure in which the rotating disk 502 itself sticks to the coil 503.
- the rotating disk 502 is operated by either being pressed against the pressing plate 504 and pressed against the fixed plate 505 fixed outside thereof, or released without being pressed.
- the pressing plate 504 is pressed by a spring and moves in the direction of the outer fixed plate 505. Since the rotating disk 502 is sandwiched between the two, the rotating disk 502 is pressed by the spring. Is also pinched and fixed.
- the pressing plate 504 is attracted to the coil 503 against the spring 506, so that the rotating disk 502 is released.
- the electromagnetic brake may not work when the power is turned off. In that case, the movable part 203 descends while rotating the ball screw 101 by its own weight, which is very dangerous. Therefore, a mechanism for attaching a plurality of electromagnetic brakes for redundancy has been adopted. However, with such redundancy, it is difficult to discover that some electromagnetic brakes are malfunctioning. Therefore, the malfunction detection unit 107 determines the fall of the movable unit 203 based on the amount of rotation detected by the encoder 225 attached to the drive motor 221 while there is a sufficient braking capacity, and detects the malfunction of the electromagnetic brake. To detect.
- the brake control unit 106 stops power supply to the drive motor 221 when shutting off the power supply of the drive mechanism unit 200 of the machine tool, and alternately turns at least one of the at least two electromagnetic brakes 105 and 224 into at least Open one electromagnetic brake. That is, the electromagnetic brakes 105 and 224 are inspected when the power of the drive mechanism 200 of the machine tool is shut off. Furthermore, the failure detection unit 107 compares the falling distance of the movable unit 203 from the time of power-off with a predetermined threshold when the entire machine tool or the drive mechanism unit 200 of the machine tool is turned on. When it has fallen more than a predetermined threshold value, it determines with a malfunction in the electromagnetic brake which is not open
- the encoder 225 determines whether the movable unit 203 has dropped, but the present invention is not limited to this.
- the position of the movable portion 203 can be seen with an optical scale or a magnetic scale provided along the ball screw 101.
- the electromagnetic brakes 105 and 224 By applying the electromagnetic brakes 105 and 224 alternately when the power is turned off, the difference between the position of the movable part 203 when the power is turned off and the position of the movable part 203 when the power is turned on is turned on. It can be judged at the time. That is, in this embodiment, it can be detected that there is an abnormality in any one of the electromagnetic brakes of the drive mechanism 200 of the machine tool.
- FIG. 6 is an external view of an NC (Numerical Control) lathe 600 as a machine tool according to the present embodiment.
- NC Numerical Control
- the ball screw 601 is provided in the Y-axis direction, and the tool rest 603 moves along the ball screw 601. Since other configurations and operations are the same as those of the second embodiment, the same configurations and operations are denoted by the same reference numerals, and detailed description thereof is omitted.
- the Y-axis servo motor 602 moves the tool post 603 as a movable part up and down along the ball screw 601.
- the X-axis servo motor 612 moves the entire Y-axis moving mechanism in the X-axis direction. Then, the workpiece attached to the spindle head 606 is cut by the tool attached to the tool rest 603 while the tool rest 603 is moved to a predetermined position below.
- an electromagnetic brake 604 is provided directly below the servo motor 602 so that the tool post 603 does not fall under its own weight when the power supply is stopped.
- a second electromagnetic brake 605 is also provided at the downstream end of the ball screw 601. In such a configuration, the electromagnetic brakes 604 and 605 are alternately operated and alternately turned off, and the encoder 622 and 623 are used to determine whether or not the moving distance of the tool post 603 is a predetermined value or more. In accordance with the determination result, a failure of the electromagnetic brakes 604 and 605 is detected.
- FIG. 7 is a view of the NC lathe 600 viewed from the direction of the arrow 610 in FIG. It can be seen that an electromagnetic brake 604 is provided on the downstream side of the Y-axis servomotor 602. At the same time as the supply of power to the servo motor 602 is stopped, the electromagnetic brake 604 is operated to stop the ball screw 601. As described above, the present invention can be applied to the NC lathe as described in the present embodiment.
- FIG. 8 is an overall external view of the vertical machining center 800.
- FIG. 9 is a view of the main axis moving mechanism in the Z-axis direction incorporated in the vertical machining center 800.
- a moving mechanism 801 that relatively moves the tool spindle and the workpiece in the X-axis direction, the Y-axis direction, and the Z-axis direction.
- the moving mechanism 801 includes a moving mechanism 900 in the Z direction shown in FIG.
- the moving mechanism 900 is provided with two Z-axis servomotors 901 and 902 and ball screws 903 and 904 rotated by the respective servomotors.
- a spindle head 905 is provided as a movable part that moves up and down in the Z-axis direction as the ball screws 903 and 904 rotate.
- Servo motors 901 and 902 are provided with electromagnetic brakes 906 and 907, respectively, and are configured redundantly so that the two ball screws 903 and 904 do not rotate reliably even when power supply to the servo motors 901 and 902 is stopped. It has become.
- Servo motors 901 and 902 are provided with electromagnetic brakes 906 and 907 and encoders 908 and 909, respectively.
- the electromagnetic brakes 906 and 907 grip the ball screws 903 and 904 so as not to rotate in a state where power is not supplied to the servo motors 901 and 902.
- the encoders 908 and 909 detect the rotation angle of the rotation shaft of the servo motor connected to the ball screw, and detect the malfunction of the electromagnetic brakes 906 and 907.
- the present invention can also be applied to a vertical machining center.
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Abstract
Description
上下方向に延設されたボールネジと、
前記ボールネジを回転駆動する駆動モータと、
前記駆動モータによる前記ボールネジの回転に応じて、前記ボールネジに沿って上下動する可動部と、
前記駆動モータへの電力供給停止中における前記可動部の下降を防止するための少なくとも2つのブレーキと、
前記駆動モータへの電力供給停止中において、前記少なくとも2つのブレーキの内、少なくとも1つのブレーキを開放させるブレーキ制御部と、
前記少なくとも1つのブレーキを開放させたことによる前記可動部の落下の有無または落下距離を検出して、前記少なくとも2つのブレーキの内、開放されていないブレーキの不具合を検出する検出部と、
を備えた。
上下方向に延設されたボールネジと、
前記ボールネジを回転駆動する駆動モータと、
前記駆動モータによる前記ボールネジの回転に応じて、前記ボールネジに沿って上下動する可動部と、
前記駆動モータへの電力供給停止中における前記可動部の下降を防止するための少なくとも2つのブレーキと、
を備えた工作機械のブレーキチェック方法であって、
前記駆動モータへの電力供給停止中おいて、前記少なくとも2つのブレーキの内、少なくとも1つのブレーキを開放させるブレーキ制御ステップと、
前記少なくとも1つのブレーキを開放させたことによる前記可動部の落下距離を検出して、前記少なくとも2つのブレーキの内、開放されていないブレーキの不具合を検出する検出ステップと、
を含む。
本発明の第1実施形態としての工作機械の駆動機構部100について、図1A、図1Bを用いて説明する。図1A、図1Bに示すように、工作機械の駆動機構部100は、ボールネジ101とロータ102と可動部103と少なくとも2つのブレーキ104、105とブレーキ制御部106と不具合検出部107とを含む。ここでは例としてロータ102とブレーキ104とを内蔵したブレーキ内蔵モータを示している。
次に本発明の第2実施形態に係る工作機械の駆動機構部200について、図2A~図5を用いて説明する。図2Aは、本実施形態に係る工作機械の駆動機構部200の外観構成を説明するための図であり、図2Bは、工作機械の駆動機構部200の内部構成を示す断面図、図2Cは、その分解図である。本実施形態に係る工作機械の駆動機構部200は、上記第1実施形態と比べると、同軸上にボールネジと電磁ブレーキと駆動モータとを有する点で異なる。その他の構成および動作は、第1実施形態と同様であるため、同じ構成および動作については同じ符号を付してその詳しい説明を省略する。本実施形態において、駆動モータ221には電磁ブレーキを内蔵せず、2個の電磁ブレーキ105、224共に駆動モータ221の外に取り付けられている。
次に本発明の第3実施形態に係る工作機械について、図6~図7を用いて説明する。図6は、本実施形態に係る工作機械としてのNC(Numerical Control)旋盤600の外観図である。上記第2実施形態と比べると、Y軸方向にボールネジ601を有し、そのボールネジ601に沿って刃物台603が移動する点で異なる。その他の構成および動作は、第2実施形態と同様であるため、同じ構成および動作については同じ符号を付してその詳しい説明を省略する。
以上、本実施形態で説明したように本発明をNC旋盤に適用することができる。
次に本発明の第4実施形態に係る工作機械について、図8~図9を用いて説明する。図8は、立形マシニングセンタ800の全体外観図である。図9は、立形マシニングセンタ800に内蔵されたZ軸方向の主軸移動機構を取り出した図である。
以上、実施形態を参照して本願発明を説明したが、本願発明は上記実施形態に限定されるものではない。本願発明の構成や詳細には、本願発明のスコープ内で当業者が理解し得る様々な変更をすることができる。また、それぞれの実施形態に含まれる別々の特徴を如何様に組み合わせたシステムまたは装置も、本発明の範疇に含まれる。
Claims (6)
- 上下方向に延設されたボールネジと、
前記ボールネジを回転駆動する駆動モータと、
前記駆動モータによる前記ボールネジの回転に応じて、前記ボールネジに沿って上下動する可動部と、
前記駆動モータへの電力供給停止中における前記可動部の下降を防止するための少なくとも2つのブレーキと、
前記駆動モータへの電力供給停止中において、前記少なくとも2つのブレーキの内、少なくとも1つのブレーキを開放させるブレーキ制御部と、
前記少なくとも1つのブレーキを開放させたことによる前記可動部の落下の有無または落下距離を検出して、前記少なくとも2つのブレーキの内、開放されていないブレーキの不具合を検出する検出部と、
を備えた工作機械。 - 前記ブレーキ制御部は、前記少なくとも2つのブレーキの内、1つを残して残りを全て開放させる請求項1に記載の工作機械。
- 前記ブレーキ制御部は、前記工作機械の電源を遮断する際に、前記駆動モータへの電力供給を停止させた上で、前記少なくとも2つのブレーキの内、少なくとも1つのブレーキを開放させる請求項1に記載の工作機械。
- 前記検出部は、前記駆動モータに内蔵されたエンコーダによって検知された回転量に基づいて、前記可動部の落下を判定する請求項1、2または3に記載の工作機械。
- 前記検出部は、前記工作機械全体に対する電源投入時に、電源遮断時からの前記可動部の落下距離を判定して、前記少なくとも2つのブレーキの不具合を検出する請求項1乃至4に記載の工作機械。
- 上下方向に延設されたボールネジと、
前記ボールネジを回転駆動する駆動モータと、
前記駆動モータによる前記ボールネジの回転に応じて、前記ボールネジに沿って上下動する可動部と、
前記駆動モータへの電力供給停止中における前記可動部の下降を防止するための少なくとも2つのブレーキと、
を備えた工作機械のブレーキチェック方法であって、
前記駆動モータへの電力供給停止中おいて、前記少なくとも2つのブレーキの内、少なくとも1つのブレーキを開放させるブレーキ制御ステップと、
前記少なくとも1つのブレーキを開放させたことによる前記可動部の落下距離を検出して、前記少なくとも2つのブレーキの内、開放されていないブレーキの不具合を検出する検出ステップと、
を含むブレーキチェック方法。
Priority Applications (4)
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US15/511,304 US10507559B2 (en) | 2014-09-19 | 2015-06-22 | Machine tool and brake checking method |
KR1020177008389A KR20170061678A (ko) | 2014-09-19 | 2015-06-22 | 공작 기계 및 브레이크 체크 방법 |
CN201580050291.8A CN106715043B (zh) | 2014-09-19 | 2015-06-22 | 机床和制动器检查方法 |
EP15842214.7A EP3195975A4 (en) | 2014-09-19 | 2015-06-22 | Machine tool and brake checking method |
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JP2014190856A JP5926782B2 (ja) | 2014-09-19 | 2014-09-19 | 工作機械およびブレーキチェック方法 |
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EP (1) | EP3195975A4 (ja) |
JP (1) | JP5926782B2 (ja) |
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JP6789271B2 (ja) * | 2018-09-18 | 2020-11-25 | 株式会社Screenホールディングス | 基板処理装置 |
JP7285107B2 (ja) * | 2019-03-28 | 2023-06-01 | シチズン時計株式会社 | 回転工具装置および工作機械 |
JP2022104003A (ja) * | 2020-12-28 | 2022-07-08 | 日本電産サンキョー株式会社 | ロボットおよびロボットの制御方法 |
CN113560934B (zh) * | 2021-09-07 | 2022-05-27 | 北京博鲁斯潘精密机床有限公司 | 一种精密数控机床精确定位移动机构 |
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Also Published As
Publication number | Publication date |
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JP2016060009A (ja) | 2016-04-25 |
KR20170061678A (ko) | 2017-06-05 |
EP3195975A1 (en) | 2017-07-26 |
JP5926782B2 (ja) | 2016-05-25 |
US10507559B2 (en) | 2019-12-17 |
US20170291271A1 (en) | 2017-10-12 |
CN106715043A (zh) | 2017-05-24 |
EP3195975A4 (en) | 2018-06-27 |
CN106715043B (zh) | 2020-01-10 |
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