WO2015037139A1 - 工作機械の送り軸装置 - Google Patents
工作機械の送り軸装置 Download PDFInfo
- Publication number
- WO2015037139A1 WO2015037139A1 PCT/JP2013/074897 JP2013074897W WO2015037139A1 WO 2015037139 A1 WO2015037139 A1 WO 2015037139A1 JP 2013074897 W JP2013074897 W JP 2013074897W WO 2015037139 A1 WO2015037139 A1 WO 2015037139A1
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- WIPO (PCT)
- Prior art keywords
- machine tool
- outer peripheral
- feed shaft
- axis
- planetary
- Prior art date
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Classifications
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- 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
- B23Q11/00—Accessories fitted to machine tools for keeping tools or parts of the machine in good working condition or for cooling work; Safety devices specially combined with or arranged in, or specially adapted for use in connection with, machine tools
- B23Q11/0032—Arrangements for preventing or isolating vibrations in parts of the machine
-
- 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
- B23Q1/00—Members which are comprised in the general build-up of a form of machine, particularly relatively large fixed members
- B23Q1/25—Movable or adjustable work or tool supports
- B23Q1/44—Movable or adjustable work or tool supports using particular mechanisms
- B23Q1/50—Movable or adjustable work or tool supports using particular mechanisms with rotating pairs only, the rotating pairs being the first two elements of the mechanism
- B23Q1/54—Movable or adjustable work or tool supports using particular mechanisms with rotating pairs only, the rotating pairs being the first two elements of the mechanism two rotating pairs only
- B23Q1/5406—Movable or adjustable work or tool supports using particular mechanisms with rotating pairs only, the rotating pairs being the first two elements of the mechanism two rotating pairs only a single rotating pair followed perpendicularly by a single rotating pair
-
- 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
- B23Q11/00—Accessories fitted to machine tools for keeping tools or parts of the machine in good working condition or for cooling work; Safety devices specially combined with or arranged in, or specially adapted for use in connection with, machine tools
- B23Q11/12—Arrangements for cooling or lubricating parts of the machine
- B23Q11/126—Arrangements for cooling or lubricating parts of the machine for cooling only
-
- 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
- B23Q17/09—Arrangements for observing, indicating or measuring on machine tools for indicating or measuring cutting pressure or for determining cutting-tool condition, e.g. cutting ability, load on tool
- B23Q17/0952—Arrangements for observing, indicating or measuring on machine tools for indicating or measuring cutting pressure or for determining cutting-tool condition, e.g. cutting ability, load on tool during machining
- B23Q17/0971—Arrangements for observing, indicating or measuring on machine tools for indicating or measuring cutting pressure or for determining cutting-tool condition, e.g. cutting ability, load on tool during machining by measuring mechanical vibrations of parts of the machine
- B23Q17/0976—Detection or control of chatter
-
- 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
- B23Q5/02—Driving main working members
- B23Q5/04—Driving main working members rotary shafts, e.g. working-spindles
- B23Q5/12—Mechanical drives with means for varying the speed ratio
- B23Q5/16—Mechanical drives with means for varying the speed ratio infinitely-variable
- B23Q5/162—Mechanical drives with means for varying the speed ratio infinitely-variable mechanically-operated
-
- 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
- B23Q5/56—Preventing backlash
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- 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
- F16H1/00—Toothed gearings for conveying rotary motion
- F16H1/28—Toothed gearings for conveying rotary motion with gears having orbital motion
- F16H1/2863—Arrangements for adjusting or for taking-up backlash
-
- 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
- B23Q2220/00—Machine tool components
- B23Q2220/006—Spindle heads
Definitions
- the present invention relates to a machine tool feed shaft device.
- chatter vibration may occur due to the process of cutting the workpiece by the cutting edge of the rotary tool.
- the occurrence frequency of chatter vibration is high. Chatter vibration deteriorates the machining accuracy of the workpiece. Chatter vibration is caused by insufficient transmission system rigidity due to backlash of a gear of a reduction gear used in a machine tool feeding device.
- Patent Document 1 discloses that the driving force of two servo motors drives one feed shaft in parallel with two gear trains.
- a rotary feed shaft device is disclosed.
- the vibration is detected by the detecting means for detecting the vibration of the machine tool during workpiece machining, the pressure between the meshing tooth surfaces of each of the two gear trains of the rotary feed shaft device.
- the two servo motors are controlled so as to increase.
- Patent Document 2 discloses a drive device for an industrial robot having a robot arm supported by two speed reducers as a backlash removal technique.
- one input shaft of two speed reducers is connected to the input shaft of the other speed reducer to remove backlash of the drive device.
- the present invention aims to provide a machine tool feed shaft device in which the rigidity of the speed reducer can be varied in accordance with the machining situation.
- a feed shaft device of a machine tool that combines the first and second reduction gears, one of which is an input portion and the other is an output portion, and is interposed in the feed shaft device
- the element as the input part of the first reduction gear and the element as the input part of the second reduction gear are connected to one drive source
- the output element of the first reducer and the element that is the output part of the second reducer are connected to form one output part
- a feed shaft device for a machine tool is provided in which an actuator that variably applies a rotational torque is provided to at least one of the fixed portion of the first reducer and the fixed portion of the second reducer.
- the rotational torque is variably applied from the actuator to at least one of the fixed parts of the first and second reduction gears, by increasing the rotational torque during heavy cutting, The rigidity of the first and second reduction gears can be increased, and the vibration damping ability due to the friction between the tooth surfaces engaged with the two reduction gears can be increased to suppress chatter vibration.
- the rotational torque applied to the one fixed part by reducing the rotational torque applied to the one fixed part, the friction between the tooth part surfaces of the two reduction gears meshing is reduced, and the heat generation is reduced.
- the coolant can be circulated through the outer ring of the speed reducer to prevent seizure of the speed reducer.
- FIG. 1 It is sectional drawing which shows the example which applied the feed shaft apparatus of this invention to the A-axis feed apparatus which tilts the spindle head of a machine tool. It is a principal part expanded sectional view of the feed shaft apparatus of the machine tool shown in FIG. It is a side view which shows an example of the machine tool which has the feed shaft apparatus of this invention.
- a machine tool 100 is a spindle head tilt type five-axis control machine tool, and includes a bed 102 serving as a base fixed to a floor surface of a factory. Are attached so as to be horizontally movable in the Z-axis direction (left-right direction in FIG. 3).
- a table 106 is mounted on the upper surface of the bed 102 in front of the column 104 so as to be horizontally movable in the X-axis direction (a direction perpendicular to the paper surface in FIG. 3). Is attached.
- the headstock 110 is attached to the front surface of the column 104 so as to be movable in the Y-axis direction (vertical direction).
- a swivel base 112 is attached to the front surface of the headstock 110 so as to be able to rotate and feed in the C-axis direction around the Z-axis.
- the swivel base 112 is attached with a spindle head support 10 constituting an A-axis feed device as an example of a feed shaft device according to the present invention.
- a spindle head 114 is supported on the spindle head support 10 so as to be able to rotate and feed in the A-axis direction around the tilt axis Oa parallel to the X-axis.
- a main shaft 116 is supported on the main shaft head 114 so as to be rotatable around its central axis Os.
- An acceleration sensor S is attached to the spindle head 114 as chatter vibration detection means.
- the vibration detection means S may be constituted by other sensors such as a displacement sensor and a speed sensor.
- the table 106 is provided so as to reciprocate along a pair of X-axis guide rails (not shown) extending in the X-axis direction on the upper surface of the bed 102.
- the bed 102 is connected to a ball screw (not shown) extending in the X-axis direction and one end of the ball screw as an X-axis feeding device that reciprocates the table 106 along the X-axis guide rail.
- An X-axis servomotor Mx is provided, and a nut (not shown) that engages with the ball screw is attached to the table 106.
- the headstock 110 is provided so as to reciprocate along a pair of Y-axis guide rails extending in the Y-axis direction (vertical direction in FIG. 3) on the front surface of the column 104.
- the column 104 is connected to a ball screw (not shown) extending in the Y-axis direction and one end of the ball screw as a Y-axis feeding device that reciprocates the headstock 110 along the Y-axis guide rail.
- a Y-axis servo motor My is provided, and a nut (not shown) that engages with the ball screw is attached to the headstock 110.
- the column 104 is provided so as to reciprocate along a pair of Z-axis guide rails (not shown) extending in the Z-axis direction on the upper surface of the bed 102.
- the bed 102 is connected to a ball screw (not shown) extending in the Z-axis direction and one end of the ball screw as a Z-axis feeding device that reciprocates the column 104 along the Z-axis guide rail.
- a Z-axis servomotor Mz is provided, and a nut (not shown) that engages with the ball screw is attached to the column 104.
- the spindle stock 110 is also provided with a C-axis servo motor Mc for rotating and feeding the swivel 112, the spindle head support 10 and the spindle head 114 in the C-axis direction.
- the spindle head support 10 is provided with an A-axis servomotor Ma as a drive source for rotating and feeding the spindle head 114 in the A-axis direction about the tilt axis Oa.
- the spindle head support 10 is further provided with a preload servomotor M as an actuator for adjusting the rigidity of a power transmission system of a reduction gear 50, which will be described later.
- the X-axis servo motor Mx, the Y-axis servo motor My, the Z-axis servo motor Mz, the A-axis servo motor Ma, the C-axis servo motor Mc, and the preload servo motor M are connected to an NC device 130 that controls the machine tool 100. .
- the acceleration sensor S is also connected to the NC device 130.
- the NC device 130 controls the power (current value) supplied to the X-axis servo motor Mx, Y-axis servo motor My, Z-axis servo motor Mz, A-axis servo motor Ma, C-axis servo motor Mc and preload servo motor M. Is done.
- the machine tool 100 sends the X axis, the Y axis, the Z axis, the A axis, and the C axis according to the NC program, respectively, so that the tool T attached to the tip end of the main spindle 116 and the work attached to the table 106 are obtained. W is moved relative to each other, and the workpiece W is machined by the tool T.
- the spindle head support 10 includes a housing 12 for housing a reduction gear 50 and an A-axis drive motor Ma for rotationally driving the A-axis. More specifically, the housing 12 has a gear chamber 14 for housing the reduction gear 50 and a recess 16 for housing the A-axis drive motor Ma formed in the rear part thereof, and the front part on the opposite side is mutually connected. A pair of spaced side walls 12a, 12b is formed.
- the A-axis servomotor Ma has an output shaft 52 that extends along an axis O that extends parallel to the tilt axis Oa and is rotatably supported by the housing 12.
- the spindle head 114 is disposed between the pair of side walls 12 a and 12 b of the housing 12.
- the spindle head 114 has tilting shafts 118 and 120 extending collinearly in opposite directions from the side surfaces thereof, and the tilting shafts 118 and 120 can be rotated by bearings 11a and 11b provided on the side walls 12a and 12b. Supported.
- the tilting shafts 118 and 120 are tilted along the tilt axis Oa extending perpendicularly to the Z axis. Is specified.
- the reduction gear 50 includes an input planetary gear assembly 60 as a first planetary reduction gear and an output planetary gear assembly 80 as a second planetary reduction gear.
- the input-side planetary gear assembly 60 includes a sun gear 62 as an inner peripheral element, a plurality of planetary gears 66 as intermediate elements that mesh with the sun gear 62, a planet carrier 68 that holds the planetary gears 66, and a planetary gear 66. And an outer peripheral ring 64 as an outer peripheral element having internal teeth 64a that mesh with each other.
- the sun gear 62 is coupled to the output shaft 52 of the A-axis servomotor Ma.
- the outer peripheral ring 64 has external teeth 64 c, and the external teeth 64 c mesh with the pinion 72.
- the pinion 72 is fixed to an output shaft 74 of a preload servomotor M as an actuator that gives a variable rotational torque to the outer ring 64.
- the outer peripheral ring 64 is rotatably supported by the bearing 70 on the inner peripheral surface of the gear chamber 14.
- the outer ring 64 is engaged by the preload servomotor M through the engagement between the outer teeth 64 c and the pinion 72.
- the outer ring 64 is held so as not to rotate with respect to the inner circumferential surface of the gear chamber 14 by continuously applying a torque as a preload to the gear chamber 14.
- the preload servomotor M can be an electric motor, a hydraulic motor, or a pneumatic motor. Further, a rack gear may be used in place of the pinion 72 as the preload servomotor M as a linear motion actuator such as a fluid pressure cylinder.
- the output planetary gear assembly 80 includes a sun gear 82 as an inner peripheral element, a plurality of planetary gears 86 as intermediate elements that mesh with the sun gear 82, and first and second planet carriers 88 that hold the planetary gears 86. , 90 and an outer peripheral ring 84 as an outer peripheral element having inner teeth 84 a meshing with the planetary gear 86.
- the sun gear 82 is coupled to the output shaft 52 of the A-axis servomotor Ma.
- the outer peripheral ring 84 is fixed to the inner peripheral surface of the gear chamber 14 as a stationary part of the spindle head support 10.
- the outer ring 84 is fixed so as not to move particularly in the circumferential direction by an appropriate means such as a key and groove, a spline, or an interference fit.
- the first planet carrier 88 of the output side planetary gear assembly 80 is coupled to the planet carrier 68 of the input side planetary gear assembly 60 so as to rotate integrally with the coupling part 73.
- the second planet carrier 90 of the output planetary gear assembly 80 is coupled to the output shaft 92 of the reduction gear 50.
- a driving gear 122 is fixed to the output shaft 92.
- the drive gear 122 meshes with an intermediate gear 124 that is rotatably supported about the axis Om, and the intermediate gear 124 meshes with a driven gear 126 that is fixed to one tilt shaft 120.
- the rotation of the A-axis servomotor Ma is transmitted to the spindle head 114 via the reduction gear 50, the drive gear 122, the intermediate gear 124, the driven gear 126, and the tilting shaft 120.
- the spindle head 114 is rotationally fed in the A-axis direction around the tilt axis Oa.
- the sun gears 62 and 82 form an input unit connected to an A-axis servomotor Ma as a drive source, and the planetary gears 66 and 86 and the planetary carriers 68, 88 and 90 are connected to the output shaft 92.
- the output part is formed, and the outer peripheral rings 64 and 84 form a fixed part.
- cooling passages 64b and 84b extending in a spiral manner in the circumferential direction are formed in the outer peripheral rings 64 and 84.
- the cooling passages 64b and 84b are connected in series to the cooler 76 via cooling pipes 78a, 78b and 78c.
- the coolant is supplied from the cooler 76 to the cooling passage 84b through the cooling pipe 78a, from the cooling passage 84b to the cooling passage 64b through the cooling pipe 78b, and from the cooling passage 64b to the cooling pipe 78c. It circulates so that it may return to cooler 76 again via.
- the operation of the cooler 76 is controlled so that the temperature of the coolant is synchronized with the body temperature of the bed 102 of the machine tool 100, and the heat generation of the speed reducer 50 is removed.
- the preload servomotor M variably applies torque to the outer ring 64 as a fixed portion of the input planetary gear assembly 60 via the pinion 72 while the machine tool 100 is operating. As a result, the pressure acting between the meshing tooth surfaces of the input planetary gear assembly 60 and the output planetary gear assembly 80 is adjusted, and the rigidity of the power transmission system is adjusted.
- Current value is controlled by the NC device 130.
- the power (current value) supplied to the preload servomotor M is increased so that the input planetary gear assembly 60 and the output planetary gear assembly 80 mesh with each other. Increase the pressure on the contact surface of the teeth.
- the power (current value) supplied to the preload servomotor M is lowered to reduce the pressure.
- Control of the electric power (current value) supplied to the preload servomotor M based on such machining conditions can be described in M code in the machining program, for example.
- the NC device 130 determines from the tool number command for automatic tool change that a large-diameter tool is mounted on the spindle 116, determines whether heavy cutting or light cutting is performed based on the load of the spindle drive motor,
- the preload servomotor M may be controlled by determining that the next operation is fast-forward from the axis fast-forward command.
- the preload servomotor M may always be supplied with electric power having a value larger than at least zero, or may be supplied with ON-OFF control. When it is OFF, the output shaft 74 of the preload servomotor M is mechanically braked.
- the NC device 130 increases the power (current value) supplied to the preload servomotor M, and the outer periphery via the pinion 72.
- the rotational torque applied to the ring 64 may be increased, and the pressure acting between the meshing tooth surfaces of the input planetary gear assembly 60 and the output planetary gear assembly 80 may be increased. This increases the friction damping capacity between the tooth surfaces. That is, large friction is generated between the tooth surfaces inside the speed reducer, and chatter vibration is converted into heat. Then, chatter vibration is reduced.
- the NC device 130 can control the current value supplied to the preload servomotor M so as to be proportional to the difference ⁇ V between the current amplitude V of the vibration detected by the acceleration sensor S and the threshold value V0.
- the sun gears 62 and 82 form the input part
- the planetary gears 66 and 86 and the planetary carriers 68, 88 and 90 form the output part
- the outer peripheral rings 64 and 84 form the fixed part.
- the present invention is not limited to this, the sun gears 62 and 82 form the input portion
- the planetary gears 66 and 86 and the planetary carriers 68, 88, and 90 form the fixed portion
- the outer peripheral rings 64 and 84 An output unit may be formed.
- the sun gears 62 and 82 may form a fixed portion, the planetary gears 66 and 86 and the planetary carriers 68, 88, and 90 may form an output portion, and the outer peripheral rings 64 and 84 may form an input portion.
- the sun gears 62 and 82 may form a fixed portion, the planetary gears 66 and 86 and the planet carriers 68, 88, and 90 may form an input portion, and the outer peripheral rings 64 and 84 may form an output portion.
- the sun gears 62 and 82 may form an output part, the planetary gears 66 and 86 and the planetary carriers 68, 88 and 90 may form an input part, and the outer peripheral rings 64 and 84 may form a fixed part.
- sun gears 62 and 82 may form an output portion
- the planetary gears 66 and 86 and the planetary carriers 68, 88, and 90 may form a fixed portion
- the outer peripheral rings 64 and 84 may form an input portion. Good.
- rotational torque is applied to the outer peripheral ring 64 of the input-side planetary gear assembly 60 as the fixed portion by the preload motor as the actuator.
- a rotational torque may be applied to the ring 84.
- rotational torques in opposite directions may be applied to the outer peripheral rings 64 and 84 of both the input side and output side planetary gear assemblies 60 and 80.
- the reduction gear 50 as a planetary reduction gear is configured by a general planetary gear mechanism.
- the present invention is not limited to this, and the reduction gear 50 is not limited to Tokyo, Japan.
- An RV reducer registered trademark
- Harmonic Drive registered trademark
- the speed reduction device 50 is provided in the A-axis power transmission system.
- it may be provided in the B-axis or C-axis power transmission system, which is another rotary feed shaft, or X, Y Alternatively, it may be provided in a power transmission system of a linear feed shaft such as a Z axis.
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Abstract
Description
前記第1の減速機の入力部とした要素と前記第2の減速機の入力部とした要素とを1つの駆動源に連結し、
前記第1の減速機の出力部とした要素と前記第2の減速機の出力部とした要素とを連結して1つの出力部とし、
前記第1の減速機の固定部と前記第2の減速機の固定部の少なくとも一方の固定部に可変に回転トルクを付与するアクチュエータを設けた工作機械の送り軸装置が提供される。
まず、図3を参照して、本発明の送り軸装置を有した工作機械の一例を説明する。
図3において、工作機械100は、主軸頭傾斜型の5軸制御工作機械であって、工場の床面に固定される基台となるベッド102を具備し、該ベッド102上には、コラム104が、Z軸方向(図3において左右方向)に水平移動可能に取り付けられている。ベッド102の上面においてコラム104の前方には、テーブル106がX軸方向(図3において紙面に垂直な方向)に水平移動可能に取り付けられており、テーブル106上にはイケール108を介してワークWが取り付けられる。
主軸頭支持台10は、減速装置50およびA軸を回転駆動するためのA軸駆動モータMaを収納するためのハウジング12を具備している。より詳細には、ハウジング12は、その後方部分に減速装置50を収納するための歯車室14と、A軸駆動モータMaを収納するための凹所16が形成され、反対側の前方部分に互いに離間した一対の側壁12a、12bが形成されている。A軸サーボモータMaは、傾動軸線Oaと平行に延びる軸線Oに沿って延び、ハウジング12に回転可能に支持された出力軸52を有している。
12 ハウジング
50 減速装置
52 出力軸
60 入力側遊星歯車組立体
62 太陽歯車
64 外周リング
66 遊星歯車
68 遊星キャリア
72 ピニオン
73 結合部
74 出力軸
76 クーラ
80 出力側遊星歯車組立体
82 太陽歯車
84 外周リング
86 遊星歯車
88 第1の遊星キャリア
90 第2の遊星キャリア
92 出力軸
100 工作機械
102 ベッド
104 コラム
104 テーブル
106 テーブル
110 主軸台
112 旋回台
114 主軸頭
116 主軸
130 NC装置
Claims (6)
- 工作機械の送り軸装置において、
互いに回転可能に配置される内周要素、外周要素および両者間に配設された中間要素から成り、該3つの要素の1つを固定部とし、残り2つの要素の一方が入力部、他方が出力部となるように組み合わせた第1と第2の遊星型の減速機を具備し、
前記第1の減速機の入力部とした要素と前記第2の減速機の入力部とした要素とを1つの駆動源に連結し、
前記第1の減速機の出力部とした要素と前記第2の減速機の出力部とした要素とを連結して1つの出力部とし、
前記第1の減速機の固定部と前記第2の減速機の固定部の少なくとも一方の固定部に可変に回転トルクを付与するアクチュエータを設けたことを特徴とした工作機械の送り軸装置。 - 前記第1と第2の遊星型の減速機の各々は遊星歯車を具備しており、
前記内周要素が前記駆動源に連結された太陽歯車を具備し、前記中間要素が前記太陽歯車に噛合する複数の遊星歯車と、該複数の遊星歯車を保持する遊星キャリアとを具備し、前記外周要素が前記遊星歯車に噛合する内歯を有した外周リングを具備している請求項1に記載の工作機械の送り軸装置。 - 前記アクチュエータは回転出力部を有し、該回転出力部にピニオンが取り付けられており、前記2つの遊星歯車の一方の外周リングの外周面に前記ピニオンに噛合する外歯が設けられている請求項2に記載の工作機械の送り軸装置。
- 前記アクチュエータは直動出力部を有し、該直動出力部にラックが取り付けられており、前記2つの遊星歯車の一方の外周リングの外周面に前記ラックに噛合する外歯が設けられている請求項2に記載の工作機械の送り軸装置。
- 前記送り軸装置は、工作機械の回転送り軸装置である請求項1に記載の送り軸装置。
- 前記遊星歯車の外周リングには、冷却液が流通する冷却通路が形成されている請求項2に記載の工作機械の送り軸装置。
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CN201380079483.2A CN105517754B (zh) | 2013-09-13 | 2013-09-13 | 机床的进给轴装置 |
US15/021,627 US10252388B2 (en) | 2013-09-13 | 2013-09-13 | Feed axis device of a machine tool |
EP13893467.4A EP3045265A4 (en) | 2013-09-13 | 2013-09-13 | Feed rod device of machine tool |
JP2015536404A JP6214664B2 (ja) | 2013-09-13 | 2013-09-13 | 工作機械の送り軸装置 |
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US10252388B2 (en) | 2019-04-09 |
CN105517754B (zh) | 2017-11-03 |
US20160229015A1 (en) | 2016-08-11 |
EP3045265A1 (en) | 2016-07-20 |
JP6214664B2 (ja) | 2017-10-18 |
CN105517754A (zh) | 2016-04-20 |
JPWO2015037139A1 (ja) | 2017-03-02 |
EP3045265A4 (en) | 2017-05-03 |
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