KR20050074510A - Electrical pressing device - Google Patents

Electrical pressing device Download PDF

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Publication number
KR20050074510A
KR20050074510A KR1020057007394A KR20057007394A KR20050074510A KR 20050074510 A KR20050074510 A KR 20050074510A KR 1020057007394 A KR1020057007394 A KR 1020057007394A KR 20057007394 A KR20057007394 A KR 20057007394A KR 20050074510 A KR20050074510 A KR 20050074510A
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KR
South Korea
Prior art keywords
press device
housing
gear
pressing tool
nut
Prior art date
Application number
KR1020057007394A
Other languages
Korean (ko)
Inventor
랄프 코산
카이 실리그
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랄프 코산
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Publication of KR20050074510A publication Critical patent/KR20050074510A/en

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Classifications

    • 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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/02—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows
    • F16C19/14—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load
    • F16C19/16—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with a single row of balls
    • F16C19/163—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with a single row of balls with angular contact
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B1/00—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen
    • B30B1/18—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen by screw means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/0094—Press load monitoring means
    • 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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/52—Bearings with rolling contact, for exclusively rotary movement with devices affected by abnormal or undesired conditions
    • F16C19/522—Bearings with rolling contact, for exclusively rotary movement with devices affected by abnormal or undesired conditions related to load on the bearing, e.g. bearings with load sensors or means to protect the bearing against overload
    • 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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/54—Systems consisting of a plurality of bearings with rolling friction
    • F16C19/541—Systems consisting of juxtaposed rolling bearings including at least one angular contact bearing
    • F16C19/542—Systems consisting of juxtaposed rolling bearings including at least one angular contact bearing with two rolling bearings with angular contact
    • F16C19/543—Systems consisting of juxtaposed rolling bearings including at least one angular contact bearing with two rolling bearings with angular contact in O-arrangement
    • 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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C35/00—Rigid support of bearing units; Housings, e.g. caps, covers
    • F16C35/04—Rigid support of bearing units; Housings, e.g. caps, covers in the case of ball or roller bearings
    • F16C35/06—Mounting or dismounting of ball or roller bearings; Fixing them onto shaft or in housing
    • 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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2229/00—Setting preload
    • 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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2233/00—Monitoring condition, e.g. temperature, load, vibration
    • 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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2300/00—Application independent of particular apparatuses
    • F16C2300/30—Application independent of particular apparatuses related to direction with respect to gravity
    • F16C2300/32—Horizontal, e.g. bearings for supporting a horizontal shaft

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Press Drives And Press Lines (AREA)
  • Transmission Devices (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
  • Presses And Accessory Devices Thereof (AREA)

Abstract

The invention relates to an electrical pressing device comprising an electric motor (2); a step-up gear (8); a spindle drive (66) embodied as a threaded roller screw drive, the threaded spindle (14) thereof being connected to the step-up gear (8), and the threaded nut (16) thereof being guided in a cylindrical housing (22) in a rotationally fixed and axially displaceable manner and being connected to a pressing tool, for converting a rotational movement of the electric motor (2) into a linear movement of the pressing tool; a displacement sensor (30) for determining the distance covered by the pressing tool; and a sensor (10) for determining the compressive force of the pressing tool. The threaded spindle (14) is mounted in the housing by means of a pre-stressed set of angular ball bearings (12), the first angular ball bearing (46) being used to absorb tractive forces and the second angular ball bearing (48) being used to absorb compressive forces. The internal rings of the angular ball bearings (46, 48) are clamped next to each other, against a shaft shoulder (54) of the threaded spindle (14), by means of a shaft nut (52), and the outer rings of the angular ball bearings (46, 48) are clamped next to each other, against a projection (58) of the housing, by means of a housing nut (56), such that the inventive device can absorb essentially identical tractive or pressure forces, without axial play.

Description

전기 프레스장치{ELECTRICAL PRESSING DEVICE}Electric pressing device {ELECTRICAL PRESSING DEVICE}

본 발명은 전기모터, 스텝업 기어, 유성 롤러스크루 형태의 주축 드라이브, 스텝업 기어에 연결되는 주축 드라이브의 나사형 주축, 원통형 하우징에서 회전은 안되고 축선방향으로는 움직일 수 있게 안내되고 프레싱 도구에 연결되어 전기모터의 회전운동을 프레싱 도구의 선형운동으로 변환하는 나사너트, 프레싱 도구에 의해 이동한 거리를 판단하기 위한 주행센서, 및 프레싱 도구의 압축력을 판단하기 위한 센서를 갖춘 전기 프레스장치에 관한 것이다.The present invention is an electric motor, a step-up gear, a spindle drive in the form of a planetary roller screw, a screw-type spindle of the spindle drive connected to the step-up gear, guided in the axial direction without rotation in the cylindrical housing and connected to the pressing tool The present invention relates to an electric press device having a screw nut for converting a rotational motion of an electric motor into a linear motion of a pressing tool, a travel sensor for determining a distance traveled by the pressing tool, and a sensor for determining a compression force of the pressing tool. .

이런 종류의 프레스장치가 DE 100 11 859 C2에 기재되어 있는데, 여기서는 플랜지 숄더와 테이퍼형 롤러베어링에 의해 축선 방향으로 나사형 주축이 하우징에 지지되어 있다. 테이퍼형 롤러베어링은 리테이닝 링에 의해 주축에서 축방향으로만 움직이게 고정되고 견인 방향으로는 어떤 축력도 전달할 수 없다. 사실 이런 구성은 기존의 프레스장치에서는 불필요한데, 이는 압축력이 단순히 일방향(프레싱 방향)으로만 생겨야 하기 때문이다.A press device of this kind is described in DE 100 11 859 C2, in which the threaded spindle is supported in the housing in the axial direction by means of flange shoulders and tapered roller bearings. The tapered roller bearings are fixed by the retaining ring to move in the axial direction only in the axial direction and cannot transmit any axial force in the traction direction. In fact, such a configuration is unnecessary in the conventional press apparatus, since the compressive force should only occur in one direction (pressing direction).

도 1은 본 발명의 프레스장치의 측단면도;1 is a side cross-sectional view of a press apparatus of the present invention;

도 2는 도 1중 앵귤러 콘택트 보올베어링 부분의 확대도;FIG. 2 is an enlarged view of the angular contact bowl bearing portion of FIG. 1; FIG.

도 3은 도 1중 보올베어링이 달린 축방향 안내시스템의 확대도;3 is an enlarged view of the axial guidance system with a bowl bearing in FIG. 1;

도 4는 도 1, 2의 IV-IV선 단면도;4 is a cross-sectional view taken along the line IV-IV of FIGS. 1 and 2;

도 5는 도 1, 3의 V-V선 단면도.5 is a cross-sectional view taken along the line V-V in FIGS. 1 and 3;

본 발명은 전술한 바와 같은 종류로서 압착력(견인력과 압축력)을 생성하되 원통형 하우징의 직경을 가능한한 작게 한 전기 프레스장치를 개발하는 것을 목적으로 한다.It is an object of the present invention to develop an electric press apparatus which produces a pressing force (towing force and a compressive force) as the kind described above, while making the diameter of the cylindrical housing as small as possible.

본 발명의 다른 목적은, 축방향으로 자유롭게 위치를 선택하면서 기계틀에 단단히 연결될 수 있는 전기 프레스장치를 제공하는데 있다. 이런 기능은 종래의 프레스장치에서는 불가능한데, 이는 하우징에 장착플랜지가 있어서 프레스장치를 특정 위치에만 연결할 수 있기 때문이다. Another object of the present invention is to provide an electric press apparatus which can be firmly connected to the machine frame while freely selecting a position in the axial direction. This function is not possible with a conventional press device, because the mounting flange in the housing allows the press device to be connected only to a specific position.

본 발명의 또다른 목적은 주축 드라이브의 나사너트를 회전 없이 하우징에 대해 축방향으로만 움직일 수 있도록 안내하는 더 간단한 구조를 제공하는데 있다.Another object of the present invention is to provide a simpler structure for guiding the screw nut of the spindle drive so that it can only move in the axial direction with respect to the housing without rotation.

본 발명의 첫번째 목적은, 전기모터, 스텝업 기어, 유성 롤러스크루 형태의 주축 드라이브, 스텝업 기어에 연결되는 주축 드라이브의 나사형 주축, 원통형 하우징에서 회전 없이 축선방향으로만 움직일 수 있게 안내되고 프레싱 도구에 연결되어 전기모터의 회전운동을 프레싱 도구의 선형운동으로 변환하는 나사너트, 프레싱 도구에 의해 이동한 거리를 판단하기 위한 주행센서, 및 프레싱 도구의 압축력을 판단하기 위한 센서를 갖춘 전기 프레스장치에 있어서, 상기 나사형 주축은 사전에 부하가 걸린 앵귤러 콘택트 보올베어링을 통해 하우징에 설치되고, 이들 보올베어링중 첫번째 앵귤러 콘택트 보올베어링은 견인력을 받치기에 적합하며, 두번째 앵귤러 콘택트 보올베어링은 압축력을 견디기에 적합하고, 이들 앵귤러 콘택트 보올베어링의 내륜은 잠금너트에 의해 주축의 견부에 맞닿아 고정되며, 외륜은 하우징너트에 의해 하우징 견부에 맞닿아 고정되어서, 축방향 유동 없이 동일한 견인력이나 압축력을 지지할 수 있는 것을 특징으로 하는 프레스장치에 의해 달성된다.The first object of the present invention is an electric motor, a step up gear, a spindle drive in the form of a planetary roller screw, a threaded spindle of a spindle drive connected to a step up gear, guiding and pressing only in the axial direction without rotation in a cylindrical housing. Electric press device with screw nut connected to the tool to convert the rotational motion of the electric motor into linear motion of the pressing tool, travel sensor for determining the distance traveled by the pressing tool, and sensor for determining the compression force of the pressing tool The threaded spindle is installed in the housing via a preloaded angular contact ball bearing, wherein the first angular contact ball bearing of these ball bearings is suitable for traction and the second angular contact ball bearing is compressive. The inner ring of these angular contact ball bearings The lock nut is fixed against the shoulder of the main shaft, and the outer ring is fixed to the housing shoulder by the housing nut, and is achieved by the press apparatus, which can support the same traction or compression force without axial flow. .

앵귤러 콘택트 보올베어링은 2개의 첫번째 보올베어링과 2개의 두번째 보올베어링으로 이루어질 수 있다.Angular contact bowl bearings may consist of two first bowl bearings and two second bowl bearings.

스텝업 기어는 다단 트랜스미션으로 설계되고, 동력전달비는 i=5인 것이 유리하다. The step-up gear is designed with a multistage transmission, and the power transmission ratio is advantageously i = 5.

편리하게, 전기모터는 전기로 제어되고 모터축에 각도검출기가 달려있으며, 각도검출기의 각도신호, 스텝업 기어의 동력전달비 및 주축 드라이브의 나사피치를 이용해 프레싱 도구에 의해 움직인 경로를 결정하는 수단이 제공된다. Conveniently, the electric motor is electrically controlled and has an angle detector on the motor shaft, which uses the angle signal of the angle detector, the power transfer ratio of the step-up gear and the screw pitch of the spindle drive to determine the path taken by the pressing tool. Means are provided.

또, 스텝업 기어의 출력축과 주축 사이에는 토크센서가 배치된다. 토크센서는 측정값을 무접촉 송신하는 송신기를 구비한다. 압축력의 변화에 맞도록 토크센서에 쉽게 접근하여 교환할 수 있다. 이렇게 되면, 측정범위가 다른 여러가지 토크센서를 압착력에 맞게 적절히 충분히 이용하여 측정 정밀도를 향상시킬 수 있다.In addition, a torque sensor is disposed between the output shaft and the main shaft of the step-up gear. The torque sensor has a transmitter for contactless transmission of the measured value. The torque sensor can be easily accessed and exchanged for changes in compression force. In this case, the measurement accuracy can be improved by appropriately using various torque sensors having different measurement ranges appropriately for the pressing force.

토크센서에 접근하기 위한 개폐식 구멍을 하우징에 형성하는 것이 유리하다. It is advantageous to form a retractable hole in the housing for access to the torque sensor.

본 발명에서는 또한, 전류가 흐르지 않을 때 작용하고 전류가 흐를 때 풀리는 모터 브레이크를 모터축에 배치한다. 이렇게 되면, 동력전달이 자동으로 정지하지 않을 경우에도, 정전시 프레스장치를 멈출 수 있다.In the present invention, a motor brake is also arranged on the motor shaft which acts when no current flows and is released when the current flows. In this case, even when the power transmission does not stop automatically, the press apparatus can be stopped at the time of power failure.

바람직하게, 주행측정장치의 영점 위치를 결정하기 위한 스프링 정지구를 나사너트와 하우징 사이에 배치한다.Preferably, a spring stop for determining the zero position of the travel measuring device is arranged between the screw nut and the housing.

이 정지구는 나사너트상의 스프링 링으로 설계될 수 있다.This stop can be designed with a spring ring on the threaded nut.

주축에는 5개 정도의 다수의 출발 나사산을 형성하는 것이 바람직하다.It is desirable to form a plurality of starting threads of about five on the main axis.

나사너트는 축방향으로 단턱진 지지슬리브 안에 보유되고, 지지슬리브는 회전 없이 하우징 안에서 안내되어, 나사너트가 축방향으로 움직일 수 있다.The screw nut is held in an axially stepped support sleeve, and the support sleeve is guided in the housing without rotation, so that the screw nut can move in the axial direction.

바람직한 실시예에서, 지지슬리브는 보올베어링이 달린 축방향 안내시스템의 내부슬리브에 연결되거나 내부슬리브를 형성하고, 안내시스템의 외부슬리브는 회전 불가능하게 하우징에 연결된다. In a preferred embodiment, the support sleeve is connected to or forms an inner sleeve of the axial guidance system with a ball bearing, and the outer sleeve of the guidance system is rotatably connected to the housing.

지지슬리브는 비교적 큰 직경의 원통형 지지부와 이곳에 체결된 소직경의 슬리브를 구비하여 프레싱 램을 형성할 수 있다.The support sleeve may have a relatively large diameter cylindrical support and a small diameter sleeve fastened thereto to form a pressing ram.

하우징은 축방향으로 자유로운 위치에서 프레스장치를 고정하기 위한 원주형 클램핑면을 가질 수 있다.The housing may have a cylindrical clamping surface for securing the press device in an axially free position.

이를 위해, 클램핑면에는 클램프 세트를 배치할 수 있다. For this purpose, a clamp set can be arranged on the clamping surface.

본 발명의 다른 장점과 특징들에 대해서는 첨부 도면을 참조한 이하의 설명으로부터 알 수 있을 것이다.Other advantages and features of the present invention will become apparent from the following description with reference to the accompanying drawings.

도 1에 본 발명에 따른 전기 프레스장치의 단면도가 도시되어 있는데, 이 프레스 장치의 주요 요소로는 모터축(4)에 작용하는 브레이크(6)를 갖춘 전기모터(2), 스텝업 기어(8), 토크 센서(10), 나사 너트(16)와 함께 주축 드라이브(66)를 형성하는 나사형 주축(14)에 지지된 한쌍의 앵귤러 콘택트 보올베어링(12), 및 나사너트(16)를 지지하는 지지슬리브(18)가 있고, 상기 지지슬리브의 일부분은 보올베어링이 달린 축방향 안내시스템(20)에 지지되며, 안내시스템은 원통형 하우징(22)에 지지되고, 하우징 원주부의 클램프면(24)의 임의의 부분을 클램프 세트(28)에 의해 머신 부분(26)에 자유롭게 고정할 수 있다. 1 shows a cross-sectional view of an electric press device according to the invention, the main elements of which are an electric motor 2 with a brake 6 acting on the motor shaft 4, a step-up gear 8. ), A pair of angular contact ball bearings 12 supported by the threaded spindle 14 forming the spindle drive 66 together with the torque sensor 10, the screw nut 16, and the screw nut 16. And a portion of the support sleeve is supported by an axial guide system 20 with a ball bearing, the guide system being supported by a cylindrical housing 22, and a clamp face 24 of the housing circumference. Any portion of) can be freely secured to the machine portion 26 by the clamp set 28.

모터축(4)에는 영점 측정센서인 각도검출기(30)가 배치되고, 거리신호를 얻기위해 각도검출기의 신호를 평가하는 변환기(32)가 제공된다. 이 작업은 스텝업 기어(8)의 동력전달비와 주축드라이브(66){나사형 주축(14), 나사너트(16)}의 피치에 따라 이루어진다. The motor shaft 4 is provided with an angle detector 30, which is a zero point measuring sensor, and is provided with a transducer 32 for evaluating the signal of the angle detector to obtain a distance signal. This operation is performed in accordance with the power transmission ratio of the step-up gear 8 and the pitch of the spindle drive 66 (the screw spindle 14, the screw nut 16).

모터 브레이크(6)는 전류가 흐르지 않을 때는 스프링에 의해 모터축의 회전을 멈추되 전원이 인가되면 풀리도록 설계된다. The motor brake 6 is designed to stop the rotation of the motor shaft by a spring when no current flows, but to be released when power is applied.

스텝업 기어(8)는 유성기어로서, 바람직하기로는 동력전달비 i=5.0 정도의 다단 트랜스미션으로 설계된다. 스텝업 기어(8)의 입력축(34)은 모터축(4)에 연결되지만, 출력축(36)은 주축(14)에 연결되고 토크센서(10)가 달려있다. 토크센서(10)에는 송신기가 달려있어서, 측정값을 무선이나 미끄럼-무접촉으로 송신할 수 있다. 하우징의 개폐식 구멍(38)을 통해 토크센서(10)에 비교적 쉽게 접근할 수 있으므로 토크센서는 교체가 용이하고, 따라서 압착력이 변해도 적절하게 토크센서를 교체하여 사용할 수 있다. 이렇게 되면, 토크센서의 측정범위에서 할 수 있는 최대의 최대의 토크/압착력에 맞는 토크센서를 사용할 수 있으므로, 측정 정밀도가 최대화된다. 이런 식으로, 정밀도를 최대값의 1% 이내로 높일 수 있으므로, 토크에 의해 결정되는 압착력도 원하는만큼 정확하게 설정할 수 있다.The step-up gear 8 is a planetary gear, and is preferably designed with a multi-stage transmission with a power transmission ratio of i = 5.0. The input shaft 34 of the step-up gear 8 is connected to the motor shaft 4, but the output shaft 36 is connected to the main shaft 14 and is equipped with a torque sensor 10. The torque sensor 10 is equipped with a transmitter, so that the measured value can be transmitted wirelessly or slip-contactlessly. Since the torque sensor 10 can be accessed relatively easily through the opening and closing hole 38 of the housing, the torque sensor can be easily replaced, and thus the torque sensor can be replaced and used properly even if the pressing force changes. This makes it possible to use a torque sensor that fits the maximum torque / compression force possible in the measurement range of the torque sensor, thus maximizing measurement accuracy. In this way, since the precision can be increased to within 1% of the maximum value, the pressing force determined by the torque can also be set as accurately as desired.

도 2, 4에 의하면, 주축(14)은 한쌍의 앵귤러콘택트 보올베어링(12)을 통해 하우징(22)에 설치되고, 보올베어링(12)의 베어링 슬리브(40)에 외부가이드(42)가 고정된다. 2 and 4, the main shaft 14 is installed in the housing 22 through a pair of angular contact bowl bearings 12, and the outer guide 42 is fixed to the bearing sleeve 40 of the bowl bearing 12. do.

본 실시예에서, 보올베어링(12)은 총 4개의 베어링으로 이루어지고, 각각의 베어링은 동일한 반경방향 힘으로 동축 지지될 수 있는데, 이 힘은 종축선(50)에 대해 45도 각도의 합벡터(44)로 표시되어 있다.In this embodiment, the ball bearing 12 is made up of a total of four bearings, each bearing being coaxially supported by the same radial force, which is the sum vector of a 45 degree angle with respect to the longitudinal axis 50. It is indicated by (44).

처음 2개의 앵귤러콘택트 보올베어링(46)은 (도 1, 2의 좌측으로 작용하는) 견인력을 견디고, 다음 2개의 보올베어링(48)은 (도 1, 2의 우측으로 작용하는) 압착력을 견디도록 배치된다. 보올베어링의 내륜은 잠금너트(52)에 의해 주축의 견부(54)에 직접 맞닿아 고정되고, 외륜은 하우징 너트(56)에 의해 하우징 견부(58)에 직접 맞닿아 고정된다. 잠금너트와 하우징너트를 조이면 보올베어링이 움직이지 않게 2쌍의 베어링(46,48)이 각각 양방향으로 사전부하가 걸리도록 보올베어링을 설계하여, 축선방향의 움직임이 없이 동일한 견인력이나 압착력을 견디도록 한다. 이렇게 구성하면, 축선방향 치수에 관한 한 베어링 슬리브나 주축 부분에서 특별한 치수오차를 둘 필요가 전혀 없는데, 이는 잠금너트나 하우징너트로 내외륜을 조이기만 해도 아무런 움직임 없이 제대로 기능하기에 충분하기 때문이다. The first two angular contact ball bearings 46 withstand traction (acting to the left of FIGS. 1 and 2), and the next two bowl bearings 48 to resist compressive force (acting to the right of FIGS. 1 and 2). Is placed. The inner ring of the ball bearing is directly fixed to the shoulder 54 of the main shaft by the lock nut 52, and the outer ring is directly fixed to the housing shoulder 58 by the housing nut 56. By tightening the lock nut and the housing nut, the bearings are designed so that the two bearings (46, 48) are preloaded in both directions so that the bearings do not move, so that they can endure the same traction or compressive force without axial movement. do. This arrangement eliminates the need for special dimensional errors in the bearing sleeves or spindle parts as far as axial dimensions are concerned, since simply tightening the inner and outer rings with locking nuts or housing nuts is sufficient to function properly without any movement. .

본 실시예에서 축의 견부(54)를 연결하는 것은 처음 5개 나사부(60)를 갖는 주축(14)인데, 나사부의 길이는 원하는 프레싱을 실행할 수 있을 정도의 크기를 갖는다. Connecting the shoulders 54 of the shaft in this embodiment is the main shaft 14 having the first five threads 60, the length of which is large enough to effect the desired pressing.

나사부(60), 나사너트(16) 및 롤러와 함께 주축(14)이 주축 드라이브(66)를 형성하는데, 주축 드라이브는 유성롤러 스크루 형태를 취한다(이하 유성롤러 나사식 주축드라이브라 함). 나사너트(16)는 페더키(68)에 의해 지지슬리브(18)에 회전하지 않게 연결되지만, 키(68)는 외부가이드(42) 내부에서 축방향으로 움직일 수 있다. 볼트(70)를 조이면 체결링(72)을 통해 지지슬리브(18) 내부에 나사너트(16)가 고정되는데, 링(76)은 압축스프링(74)의 힘을 받아 체결링(72)이나 지지슬리브(18)에 대한 스프링 정지구를 형성한다. 주축 드라이브가 (우측으로) 후진하면, 나사너트는 링(76)과 함께 베어링 슬리브(40)의 하우징 견부(58)쪽으로 움직이고, 그 결과 토크센서(10)가 토크의 증가를 감지하게 되므로, 영점위치를 결정할 수 있다. The spindle 14, together with the threaded portion 60, the threaded nut 16 and the roller, forms the spindle drive 66, which takes the form of a planetary roller screw (hereinafter referred to as a planetary roller screw spindle). The screw nut 16 is not connected to the support sleeve 18 by the feather key 68, but the key 68 can move in the axial direction inside the outer guide 42. When the bolt 70 is tightened, the screw nut 16 is fixed to the inside of the support sleeve 18 through the fastening ring 72. The ring 76 is supported by the fastening ring 72 or the support ring by the compression spring 74. Form a spring stop for the sleeve 18. When the spindle drive retracts (right), the threaded nut moves with the ring 76 toward the housing shoulder 58 of the bearing sleeve 40, so that the torque sensor 10 detects an increase in torque, thus zeroing The location can be determined.

지지슬리브(18)는 비교적 큰 직경을 갖고 나사너트(16)를 고정하는 지지부(18a)와, 지지부에 고정된 소직경의 슬리브(18b)로부터 형성되어, 프레싱 램을 형성한다. 슬리브(18b)는 보올베어링이 달린 축방향 안내시스템(20)의 내부 슬리브를 형성하거나 내부 슬리브에 연결되고(도 3, 5 참조), 외부 슬리브(21)는 리테이닝 링(77)에 의해 하우징이나 외부 가이드(42)에 고정되어 축방향으로 움직일 수 없음은 물론 페더키(78)에 의해 회전도 못하게 연결된다. 슬리브(18b)의 일단부에 프레싱 도구(도시 안됨)가 설치된다.The support sleeve 18 has a relatively large diameter and is formed from a support portion 18a for fixing the screw nut 16 and a small diameter sleeve 18b fixed to the support portion to form a pressing ram. The sleeve 18b forms an inner sleeve of the axial guidance system 20 with a ball bearing or is connected to the inner sleeve (see FIGS. 3 and 5) and the outer sleeve 21 is connected by a retaining ring 77 to the housing. It is fixed to the outer guide 42 can not be moved in the axial direction, as well as being connected to the rotation by the feather key (78). A pressing tool (not shown) is installed at one end of the sleeve 18b.

클램프 세트(28)는 원추형 죔 부재로서, 이것에 의해 프레스장치는 외부가이드(42)의 축방향의 임의의 고정위치에서 머신 부분(26)에 고정될 수 있다.The clamp set 28 is a conical clamping member, by which the press device can be fixed to the machine part 26 at any fixed position in the axial direction of the outer guide 42.

도면부호의 설명Explanation of References

2: 전기모터 4: 모터축2: electric motor 4: motor shaft

6: 모터 브레이크 8: 스텝업 기어6: motor brake 8: step-up gear

10: 토크센서 12: 앵귤러 콘택트 보올베어링10: torque sensor 12: angular contact ball bearing

14: 나사형 주축 16: 나사너트14: Threaded Spindle 16: Threaded Nut

18: 지지슬리브 18a: 지지부18: support sleeve 18a: support

18b: 슬리브 20: 보올베어링이 달린 축방향 안내시스템18b: Sleeve 20: Axial guidance system with ball bearing

21: 외부 슬리브 22: 하우징21: outer sleeve 22: housing

24: 클램프면 26: 머신 부분24: clamp surface 26: machine part

28: 클램프 세트 30: 각도검출기28: clamp set 30: angle detector

32; 변환기 34: 입력축32; Converter 34: input shaft

36: 출력축 38: 하우징의 구멍36: Output shaft 38: Hole in the housing

40: 베어링 슬리브 42: 외부가이드40: bearing sleeve 42: outer guide

44: 합벡터 46: 처음 앵귤러 콘택트 보올베어링44: sum vector 46: first angular contact ball bearing

48: 다음 앵귤러 콘택트 보올베어링 50: 종축선48: next angular contact bowl bearing 50: longitudinal axis

52: 잠금너트 54: 축견부52: lock nut 54: shaft

56: 하우징너트 58: 하우징 견부56: housing nut 58: housing shoulder

60: 나사부 66: 주축 드라이브60: screw portion 66: spindle drive

68: 페더키 70: 체결볼트68: feather key 70: tightening bolt

72: 체결링 74; 압축스프링72: fastening ring 74; Compression Spring

76: 링 77: 리테이닝 링76: ring 77: retaining ring

78: 페더키78: Feather Key

Claims (18)

전기모터(2), 스텝업 기어(8), 유성 롤러스크루 형태의 주축 드라이브(66), 스텝업 기어(8)에 연결되는 주축 드라이브의 나사형 주축(14), 원통형 하우징(22)에서 회전 없이 축선방향으로만 움직일 수 있게 안내되고 프레싱 도구에 연결되어 전기모터(2)의 회전운동을 프레싱 도구의 선형운동으로 변환하는 나사너트(16), 프레싱 도구에 의해 이동한 거리를 판단하기 위한 주행센서(30), 및 프레싱 도구의 압축력을 판단하기 위한 센서(10)를 갖춘 전기 프레스장치에 있어서:Rotation in electric motor 2, step up gear 8, spindle drive 66 in the form of a planetary roller screw, screw spindle 14 of the spindle drive connected to step up gear 8, cylindrical housing 22 Screw nut 16, which is guided to move in the axial direction only and is connected to the pressing tool and converts the rotational motion of the electric motor 2 into the linear movement of the pressing tool, the travel for judging the distance moved by the pressing tool. In an electric press apparatus having a sensor 30 and a sensor 10 for determining the compression force of the pressing tool: 상기 나사형 주축(14)은 사전에 부하가 걸린 앵귤러 콘택트 보올베어링(12)을 통해 하우징(22)에 설치되고, 이들 보올베어링중 첫번째 앵귤러 콘택트 보올베어링(46)은 견인력을 받치기에 적합하며, 두번째 앵귤러 콘택트 보올베어링(48)은 압축력을 견디기에 적합하고, 이들 앵귤러 콘택트 보올베어링(46,48)의 내륜은 잠금너트(52)에 의해 주축(14)의 견부(54)에 맞닿아 고정되며, 외륜은 하우징너트(56)에 의해 하우징 견부에 맞닿아 고정되어서, 축방향 유동 없이 동일한 견인력이나 압축력을 지지할 수 있는 것을 특징으로 하는 프레스장치.The threaded spindle 14 is installed in the housing 22 via a preloaded angular contact ball bearing 12, the first angular contact ball bearing 46 of these ball bearings being suitable for supporting traction. The second angular contact ball bearings 48 are suitable to withstand the compressive force, and the inner rings of these angular contact ball bearings 46 and 48 abut against the shoulders 54 of the main shaft 14 by the lock nuts 52. And the outer ring is fixed to the housing shoulder by the housing nut 56 to support the same traction or compression force without axial flow. 제1항에 있어서, 상기 앵귤러 콘택트 보올베어링(12)이 2개의 첫번째 보올베어링(46)과 2개의 두번째 보올베어링(48)으로 이루어지는 것을 특징으로 하는 프레스장치.2. Press device according to claim 1, characterized in that the angular contact bowl bearing (12) consists of two first bowl bearings (46) and two second bowl bearings (48). 제1항 또는 제2항에 있어서, 상기 스텝업 기어(8)가 다단 트랜스미션으로 설계된 것을 특징으로 하는 프레스장치.Press device according to claim 1 or 2, characterized in that the step-up gear (8) is designed as a multistage transmission. 전항들중의 어느 한 항에 있어서, 상기 스텝업 기어(8)의 동력전달비가 i=5인 것을 특징으로 하는 프레스장치.Press device according to any one of the preceding claims, characterized in that the power transfer ratio of the step-up gear (8) is i = 5. 전항들중의 어느 한 항에 있어서, 상기 전기모터(2)가 전기로 제어되고 모터축(4)에 각도검출기(30)가 달려있으며, 각도검출기(30)의 각도신호, 스텝업 기어(8)의 동력전달비 및 주축 드라이브(66)의 나사피치를 이용해 프레싱 도구에 의해 움직인 경로를 결정하는 수단(32)이 제공되는 것을 특징으로 하는 프레스장치. The method according to any one of the preceding claims, wherein the electric motor (2) is electrically controlled and an angle detector (30) is attached to the motor shaft (4), the angle signal of the angle detector (30), the step-up gear (8). And a means (32) for determining the path traveled by the pressing tool using the power transmission ratio of the drive and the screw pitch of the spindle drive (66). 전항들중의 어느 한 항에 있어서, 스텝업 기어(8)의 출력축(36)과 주축(14) 사이에 토크센서(10)가 배치된 것을 특징으로 하는 프레스장치.Press device according to any of the preceding claims, characterized in that a torque sensor (10) is arranged between the output shaft (36) and the main shaft (14) of the step-up gear (8). 제6항에 있어서, 상기 토크센서(10)가 측정값을 무접촉 송신하는 송신기를 구비한 것을 특징으로 하는 프레스장치.7. Press device according to claim 6, characterized in that the torque sensor (10) comprises a transmitter for contactless transmission of measured values. 제6항 또는 제7항에 있어서, 압축력의 변화에 맞도록 상기 토크센서(10)에 쉽게 접근하여 교환할 수 있는 것을 특징으로 하는 프레스장치.8. Press device according to claim 6 or 7, characterized in that the torque sensor (10) can be easily accessed and replaced in order to meet the change of the compressive force. 제6항 내지 8항중의 어느 한 항에 있어서, 토크센서(10)에 접근하기 위한 개폐식 구멍(38)이 상기 하우징에 형성된 것을 특징으로 하는 프레스장치. Press device according to any of the claims 6 to 8, characterized in that an opening (38) is formed in the housing for accessing the torque sensor (10). 전항들중의 어느 한 항에 있어서, 전류가 흐르지 않을 때 작용하고 전류가 흐를 때 풀리는 모터 브레이크(6)가 모터축(4)에 배치되는 것을 특징으로 하는 프레스장치.Press device according to any of the preceding claims, characterized in that a motor brake (6) is arranged on the motor shaft (4) which acts when no current flows and is released when the current flows. 전항들중의 어느 한 항에 있어서, 주행측정장치의 영점 위치를 결정하기 위한 스프링 정지구(76)가 나사너트(16)와 하우징(22) 사이에 배치되는 것을 특징으로 하는 프레스장치.Press device according to any one of the preceding claims, characterized in that a spring stop (76) is arranged between the screw nut (16) and the housing (22) for determining the zero position of the travel measuring device. 제11항에 있어서, 상기 정지구가 나사너트(16)상의 스프링 링(76)으로 설계된 것을 특징으로 하는 프레스장치.12. Press device according to claim 11, characterized in that the stopper is designed with a spring ring (76) on the threaded nut (16). 전항들중의 어느 한 항에 있어서, 상기 주축(14)에 5개 정도의 다수의 출발 나사산이 형성된 것을 특징으로 하는 프레스장치.Press device according to any one of the preceding claims, characterized in that a plurality of about five starting threads are formed on the main shaft (14). 전항들중의 어느 한 항에 있어서, 상기 나사너트(16)가 축방향으로 단턱진 지지슬리브(18) 안에 보유되고, 지지슬리브는 하우징(22) 안에서 무회전 안내되어, 나사너트가 축방향으로 움직일 수 있는 것을 특징으로 하는 프레스장치.The screw nut 16 is held in an axially stepped support sleeve 18, the support sleeve being guided without rotation in the housing 22, so that the screw nut is axially oriented. Press device, characterized in that movable. 제14항에 있어서, 상기 지지슬리브(18)는 보올베어링이 달린 축방향 안내시스템(20)의 내부슬리브에 연결되거나 내부슬리브를 형성하고, 안내시스템의 외부슬리브는 회전 불가능하게 하우징(22)에 연결되는 것을 특징으로 하는 프레스장치. 15. The support sleeve (18) according to claim 14, wherein the support sleeve (18) is connected to or forms an inner sleeve of the axial guidance system (20) with a ball bearing, and the outer sleeve of the guidance system is not rotatable to the housing (22). Press device, characterized in that connected. 제14항 또는 제15항에 있어서, 상기 지지슬리브(18)는 비교적 큰 직경의 원통형 지지부(18a)와 이곳에 체결된 소직경의 슬리브(18b)를 구비하여 프레싱 램을 형성하는 것을 특징으로 하는 프레스장치.16. The press according to claim 14 or 15, characterized in that the support sleeve (18) has a relatively large diameter cylindrical support (18a) and a small diameter sleeve (18b) fastened thereto to form a pressing ram. Press device. 전항들중의 어느 한 항에 있어서, 상기 하우징(22)은 축방향으로 자유로운 위치에서 프레스장치를 고정하기 위한 원주형 클램핑면(24)을 갖는 것을 특징으로 하는 프레스장치.Press device according to any of the preceding claims, characterized in that the housing (22) has a cylindrical clamping surface (24) for securing the press device in an axially free position. 제17항에 있어서, 상기 클램핑면(24)에 클램프 세트(28)가 배치되는 것을 특징으로 하는 프레스장치.18. Press device according to claim 17, characterized in that a clamp set (28) is arranged on the clamping surface (24).
KR1020057007394A 2002-11-01 2003-10-09 Electrical pressing device KR20050074510A (en)

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