EP0941812A1 - Dispositif de vérin avec une pompe à fluide et un outil de presse - Google Patents

Dispositif de vérin avec une pompe à fluide et un outil de presse Download PDF

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Publication number
EP0941812A1
EP0941812A1 EP98104322A EP98104322A EP0941812A1 EP 0941812 A1 EP0941812 A1 EP 0941812A1 EP 98104322 A EP98104322 A EP 98104322A EP 98104322 A EP98104322 A EP 98104322A EP 0941812 A1 EP0941812 A1 EP 0941812A1
Authority
EP
European Patent Office
Prior art keywords
piston
pressure
pump
press
fluid
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP98104322A
Other languages
German (de)
English (en)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Novartec AG
Original Assignee
Novartec AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Novartec AG filed Critical Novartec AG
Priority to EP98104322A priority Critical patent/EP0941812A1/fr
Priority to EP19980124210 priority patent/EP0941813B1/fr
Priority to DE59810023T priority patent/DE59810023D1/de
Publication of EP0941812A1 publication Critical patent/EP0941812A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
    • B25F5/00—Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
    • B25F5/005—Hydraulic driving means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/20—Other details, e.g. assembly with regulating devices
    • F15B15/28—Means for indicating the position, e.g. end of stroke
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/20—Other details, e.g. assembly with regulating devices
    • F15B15/28—Means for indicating the position, e.g. end of stroke
    • F15B15/2815—Position sensing, i.e. means for continuous measurement of position, e.g. LVDT
    • F15B15/2861—Position sensing, i.e. means for continuous measurement of position, e.g. LVDT using magnetic means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/20—Other details, e.g. assembly with regulating devices
    • F15B15/28—Means for indicating the position, e.g. end of stroke
    • F15B15/2815—Position sensing, i.e. means for continuous measurement of position, e.g. LVDT
    • F15B15/2869—Position sensing, i.e. means for continuous measurement of position, e.g. LVDT using electromagnetic radiation, e.g. radar or microwaves
    • F15B15/2876—Position sensing, i.e. means for continuous measurement of position, e.g. LVDT using electromagnetic radiation, e.g. radar or microwaves using optical means, e.g. laser

Definitions

  • the invention relates to a lifting cylinder device according to the preamble of Claim 1 and a pressing tool according to the preamble of claim 7.
  • Lift cylinder devices with pistons that are movable by the pressure fluid are in various areas as actuators for short movement lengths used.
  • An advantage of such actuators or lifting cylinder devices is that large forces but also fast movements can be achieved.
  • In addition can be controlled with simple valves.
  • a lifting cylinder device is more suitable as a drive motor.
  • the achievable movement force depends on lifting cylinder devices the working pressure of the pressure fluid and the dimensioning of the cylinder, or from the piston cross-section. Smaller forces can already be achieved with compressed air be, the compressibility of the air to imprecise or sprung actuation processes can lead.
  • a hydraulic pressure fluid especially oil
  • the actuation with lifting cylinder devices takes place between two end stops which the piston position is known. If so, to ensure a correct one Manipulation, a device part over a predetermined sub-area in any Leadership must be moved, in particular moved or swiveled, so can not do this with a lifting cylinder device or only between predetermined discrete Positions can be achieved. It is known to regulate for each adjustable Position a selective presence detection is provided. Once the desired the detectable position is reached, the fluid supply must be interrupted. In another solution, the maximum stroke length can be adjusted by pressing the piston rod leading from the cylinder has an adjustable stop is. The stop adjustment must be carried out manually or with an adjustment drive become, which in turn is expensive.
  • Crimping tools for crimping sleeve-shaped press fittings on pipe ends must ensure that the press jaws always press the fitting properly. Because large forces are required for pressing, there are several known ones Pressing tools used a hydraulic cylinder to actuate the press jaws. From US 5 125 324, embodiments are known in which an electric motor drives a hydraulic pump. The pressurized liquid becomes actuation a piston, which actuates the pressing tool or the pressing jaws, in a hydraulic cylinder guided. Thanks to the pump located directly on the lifting cylinder device with the electric motor, a compact actuation unit is created. At the end of the pressing process An overpressure is created in the cylinder, which opens an overpressure valve and thus ends the pressing cycle.
  • the Piston from a return spring returning the liquid to a collection area deferred.
  • the control of the complete pressing is done only via the limit pressure required to open the pressure relief valve.
  • Different press forces are required to press different fittings. In the case of a pressing tool that has a fixed limit pressure for all pressing processes a force is generated between the press jaws that exceeds the required press force goes out, a large proportion of the force is absorbed by the press jaws. These must be designed and oversized accordingly increased wear. If the press jaws jam, the limit pressure can and thus the end of the press cycle can be reached without the press fitting is correctly pressed.
  • sleeve sections are close to both sensors.
  • a third position range the sleeve is only in the vicinity of the second sensor.
  • the sleeve and the sensors are now dimensioned or spaced so that the first position range before the pressing jaws move together before the Pressing process is assigned.
  • the second position area is assigned to the pressing process and reaching the third position range corresponds to the end of the Pressing process.
  • This distance sensor can thus be used to switch off the jaw drive become. This will end the pressing process between the pressing jaws the entry into a predetermined position range is detected. All usable Press jaw pairs must therefore have a spacer. After insertion of a pair of press jaws, the distance sensor must be controlled by the Pressing device can be connected.
  • the advantage of a press jaw position detection is with the disadvantage of the complex structure of the press jaws and the connection effort connected.
  • the invention is based on the object, a versatile lifting cylinder device and / or to find a reliably acting pressing tool.
  • the current piston position can be determined at least at one point in time. So it doesn't have to be done beforehand by positioning a presence sensor at which position a presence check is carried out should. Any piston position can be detected within the positioning range become. The at least one point in time at which the position is to be recorded depends on the actuation process.
  • This position is a measure of the quality of the pressing because of the maximum achieved Feed with one of the press jaw shape and position, or of the press jaw parameters, derivable, closest press jaw position is connected.
  • this way detects a piston position that is not within a predetermined tolerance range. Based on the comparison of the detected position with at least one lower area limit the quality of the pressing can be characterized.
  • a pressing tool according to the invention is by no means on it limited.
  • the pressing tools according to the invention can be used for pressing any Workpieces are used, the pressing elements to the respective application are adjusted.
  • Another area of application is pressing of sheet metal parts, in particular the pressing of flared connections.
  • the result of the Comparison used to control a two-value display. With a complete Pressing turns on a green signal and / or at a incomplete pressing a red signal is switched on. It goes without saying even that a signal tone can also be provided instead of a display. Because Now that an effective pressing jaw position is checked, errors can occur result from pressure monitoring, can be excluded. The press jaws do not need a spacer. Any standard jaws can be used become. The entire pressing process can be independent of the position monitoring be carried out, but the position monitoring to check the quality serves the pressing. Accordingly, it is with little effort or without change the press tool control, possible, the known press tools with a position measuring device to further develop press tools according to the invention.
  • the position measuring device with the control of the pressing tool connected. Then the drive of the fluid pump and / or at least one Valve of the fluid line system can be controlled depending on a detected position.
  • the pressing process is preferably completed when one is reached Compression required piston position ended. This makes it possible to dispense with always build a standard limit pressure.
  • process control due to the continuously monitored piston position and especially the current one Press jaw parameters can also be a size derived from piston positions, such as the piston speed or the piston acceleration, to influence the Pressing process can be used.
  • the pressing tools according to the prior art can be used with many different exchangeable press jaws can be used.
  • the different press jaws are for pressing copper and steel fittings with diameters of 12, 15, 18, 22, 28, 35, 42 and 54mm, or for connecting plastic pipes with diameters of 16, 20, 25, 32mm. Besides these standard sizes are also Special jaws known for connections with diameters of 76.1, 88.9 and 108mm. It goes without saying that the press jaws that can be used have any press diameter can have. According to the respective guidance of the jaw movement and the connection to the piston rod is an assignment between the desired Position of the press jaws during the complete pressing and the required Determine piston position for all press jaws.
  • a detection unit is preferably provided which has a Press jaw characterization can be entered or recorded. This is said to ensure be that the comparison of the recorded piston position always with that for the used press jaws correct position limits.
  • the registration unit is connected to the controller or the comparison unit. If the operating staff Enter the identifier for the current press jaw on the registration unit a monitoring device can be provided which, when changing the press jaws, or when inserting the connecting bolt, entering the identifier the new press jaw demands.
  • the registration unit may be included equipped with a sensor and can therefore use the press jaw used on the basis of a capture automatically readable coding.
  • the detection can be optical, inductive or optionally also mechanically.
  • the lifting cylinder device is a versatile actuation module, that makes large forces available in the piston feed direction and due to the position measuring device over the entire positioning range Makes piston positions precisely detectable. Because the cylinder part directly afterwards the fluid pump with drive is arranged, there is a compact structure.
  • the Fluid lines and the at least one valve are in the connection area of the pump and the cylinder part arranged.
  • the drive is preferably with a gear connected to the pump and can be adapted to the respective application.
  • the pump drive is preferably an electric motor, the control of which is carried out with the control the lifting cylinder device is connected. This control enables one Control connection the triggering of a desired actuation sequence.
  • To reset of the piston part is, preferably in the cylinder part, a restoring element, in particular a return spring.
  • the piston rod acts as an actuator led out of the cylinder part.
  • the position measuring device preferably enables a distance measurement between the cylinder part and the piston part, preferably a Hall sensor and a magnet, optionally a laser interference or laser diffusion distance sensor and one Reflection surface, arranged or formed on each of the two parts.
  • a Hall sensor this is preferably on the cylinder part in the area one end face, in particular on the end face with the pressurized fluid supply.
  • the magnet is placed on the piston part.
  • the magnetic field strength in the Hall sensor, the this measures depends on the piston position or the position of the magnet.
  • a piston position can now be assigned to each value of the Hall sensor using a calibration curve become. When placing the Hall sensor and the magnet must be on it care should be taken to ensure that a clear assignment between the measured value of the Hall sensor and the position guaranteed is.
  • the distance measurement with the Hall sensor can be done with inexpensive and small components are sufficient for most hydraulic cylinder applications be carried out exactly.
  • Laser light is emitted by laser interference and laser diffusion measurements one end of the cylinder part via a reflection on the piston part back to the end back.
  • the piston position is the phase shift in the interference measurement determined between the outgoing beam and the beam reflected on the piston.
  • the laser diffusion measurement reflects the intensity of that reflected on the piston Light used as a measure of the piston position.
  • Analog measuring devices with high-frequency ultrasound are possible, whereby then problems arise due to the pressure fluctuations in the pressure fluid can because the speed of sound propagation depends on the pressure.
  • the laser and ultrasound systems are still relatively expensive, at least at the moment, so that a Measurement with a Hall sensor is preferred.
  • the position measuring device with position readings especially with an incremental scan very common and corresponding Cheap.
  • a read head must be movable along a scale.
  • the read head is used based on the required Connection line preferably attached to the cylinder part.
  • The is accordingly Scale attached to the piston or on the piston rod or by this a transmission of motion sets in motion.
  • the scale must also be passed through this seal.
  • the read head is then placed on either side of the seal.
  • the scan takes place optically or inductively. Because inductive scanning on a belt with lines different magnetization is also possible in oil without any problems inductive scanning preferred.
  • Such magnetized measuring tapes are robust and can be pressed into suitable recesses in the piston rod, for example that the piston rod remains sealable.
  • FIG. 1 shows a pressing tool 13, in which a handle 14 adjoins Housing part 1 is arranged with an electric motor 15.
  • the drive shaft 16 of the Electric motor 15 is via a bearing and gear arrangement 3 with a pump shaft 17 of a pump 4, which is only shown in a hint. It will be preferred a commercially available, in particular a Lombardini, pump is used.
  • the Pressure side of the pump 4 is via a pressure line 18 and a control valve 11 with a Entry opening 19 can be connected in a first end face 22 of the cylinder part 5.
  • a piston part 20 of the supplied pressurized fluid or hydraulic oil from the first End face 22 is arranged to be advanced.
  • On the piston part 20 are first guide and Sealing rings 21 arranged.
  • a piston rod 6 is through a bushing 24 in the second end face 23 of the cylinder part 5 out. Second guide and sealing rings 25 around the implementation 24 ensure a tight seal.
  • the control valve 11 achieves hydraulic control in which the control valve is actuated as soon as the pressure in the pressure fluid acting on the piston part 20 exceeds a limit pressure.
  • a fluid connection leads from the inlet opening 19 through the control valve 11 to a fluid reservoir 9 which in turn via a feed and return line 26 with the one connected to the second end face 23 second cylinder sub-space is connected. Due to the use of the second cylinder sub-space as a storage expansion, can be an extremely small size the lifting cylinder device with the pump 4 and the fluid guide arrangement be guaranteed.
  • a pressure sensor 10 for detecting the Pressure provided on the pressure side of the pump.
  • a press force can be obtained from the pressure value be derived. It should at least be the maximum during a pressing process Press pressure or the maximum press force are recorded. For press tools according to In the prior art, this maximum pressure value becomes a setpoint compared. If the measured pressure value is above the setpoint, it is assumed that the pressing is complete.
  • the solutions according to the invention see next to or instead of the pressure detection also a position detection, for example with a position measuring device, in particular with a distance sensor 12 before.
  • the distance sensor 12 is a Hall sensor that the magnetic field of a magnet 12a attached to the piston part 20 is detected. As before described, but other measuring devices can also be used. The order The components of a measuring device are such that the position values are as accurate as possible.
  • the drive motor 15, the gear 3, the Pump 4, the fluid line system with the control valve 11, and the cylinder part 5 formed with the position measuring device and the piston part 20 as a compact module.
  • Such a module is used as a lifting cylinder device for the most diverse, in One force-absorbing and one resettable in the other direction applicable.
  • the pressing tool 13 comprises a controller 2, which is the drive motor 15 can influence, as well as the piston position and / or the pressure value with at least makes a setpoint comparable.
  • each other display 27 signals a complete or incomplete value Pressing or a preselected piston position and / or the required specification of the used pressing tool and / or functional problems.
  • the controller 2 is preferred connected to the switch 7, by which a pressing process is triggered.
  • a pair of press rollers 28 is attached to the free end of the piston rod 6.
  • the pair of press rollers 28 is guided with a guide block 29 in a straight guide 30.
  • the straight line 30 is attached to the cylinder part 5 and has one in the region of the free end Bore 31 for receiving a fastening bolt of a pair of press jaws, not shown.
  • the press jaws can each be swiveled around an axis of rotation and have on the press rollers 28 adjacent actuating surfaces.
  • the actuating surfaces are designed that the pressing rollers moved forward, the pressing jaws by means of pivoting movements about their axes of rotation in the area of the workpiece to be pressed, in particular Fittings, move together.
  • the interior of the cylinder part 5 is from the piston part 20 in one Pressure area 5a and a reservoir area 5b divided.
  • the reset of the piston part 20 is carried out by the return spring 20a.
  • the printing area 5a is over a Pressure line 18 and a control valve 11 connectable to the pressure side of the pump 4.
  • the control valve 11 shown has two positions. In a first position the Pressure area 5a pressurized with fluid. In the second position, the pressure side the pump with the reservoir 9 and 5b, or connected to the suction side of the pump 4.
  • control valve acts as a pressure relief valve by means of an overpressure line 18a from the first to the second position switched.
  • an overpressure line 18a from the first to the second position switched.
  • pressure line 18a could analog pressure control also takes place via the pressure sensor 10 and the control 2.
  • the pressure value detected by the pressure sensor 10 would have to be included in the controller 2 a limit pressure can be compared.
  • the control 2 change the valve position via a valve control 11a.
  • the control valve 11a is also designed by means of an emergency stop switch 11b switchable.
  • the Distance sensor 12 used.
  • the distance sensor 12 is on Hall sensor that detects the magnetic field of a magnet 12a attached to the piston part 20. If necessary, the piston position is detected by a sensor 112, for example evaluates a signal reflected on the piston part 20, or else the position is determined by a reading head 212 of the cylinder part 5 on a scale 212a of the piston rod 6 read.
  • the controller 2 can adjust the position values according to the respective application process and corresponding control signals for the valve control 11a and / or provide the drive control 2a.
  • a hydraulic control can be used such as a pressure accumulator and / or a pressure reducing unit and at least one Control valve includes.
  • the controller 2 enables based on the position detection by the position sensor 12 and the pressure detection by the pressure sensor 10, and the regulation of the feed pressure and in particular the flow rate to the pressure area 5a any forward movement and positioning by means of the hydraulic control of the piston part 20.
  • the controller 2 is able to control correctly in different applications Can be connected to a higher-level control unit via a control connection 2b.
  • a lifting cylinder device is in line systems for bulk material or liquids for actuating passage and metering elements or valves can be used advantageously. If a controllable closure is required, this is preferred the pressure operated stroke is used for closing. It can start out of a large flow cross-section against reaching a required total amount towards a closing member of the lifting cylinder so that the Flow cross section is smaller and closed at the right moment. This is for fast, yet precise dosing advantageous. Opening a valve will by the pressure fluid flowing out of the pressure region 5a and the adjustment of the piston part 20 ensured by the return spring. When power cuts for safety reasons it is necessary to close the valves expedient to use the return spring for closing.
  • the hydraulic control is then designed so that the fluid from the pressure range in the de-energized state 5a emerge and the return spring 20a can reset the piston part 20.
  • the Return spring 20a is designed so that it can close the valve. Such actuated valves are particularly advantageous in chemical plants for safety reasons applicable.
EP98104322A 1998-03-10 1998-03-10 Dispositif de vérin avec une pompe à fluide et un outil de presse Withdrawn EP0941812A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP98104322A EP0941812A1 (fr) 1998-03-10 1998-03-10 Dispositif de vérin avec une pompe à fluide et un outil de presse
EP19980124210 EP0941813B1 (fr) 1998-03-10 1998-12-17 Outil de presse et procédé pour sertir les raccords de tubes
DE59810023T DE59810023D1 (de) 1998-03-10 1998-12-17 Presswerkzeug und Pressverfahren zum Verpressen von Fittings

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP98104322A EP0941812A1 (fr) 1998-03-10 1998-03-10 Dispositif de vérin avec une pompe à fluide et un outil de presse

Publications (1)

Publication Number Publication Date
EP0941812A1 true EP0941812A1 (fr) 1999-09-15

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP98104322A Withdrawn EP0941812A1 (fr) 1998-03-10 1998-03-10 Dispositif de vérin avec une pompe à fluide et un outil de presse

Country Status (2)

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EP (1) EP0941812A1 (fr)
DE (1) DE59810023D1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6244085B1 (en) 1999-02-11 2001-06-12 Von Arx Ag Pressing tool
DE202008002200U1 (de) 2008-02-15 2009-03-26 Novopress Gmbh Pressen Und Presswerkzeuge & Co. Kg Handgeführtes Pressgerät
DE102010049946A1 (de) * 2010-10-28 2012-05-03 Novopress Gmbh Pressen Und Presswerkzeuge & Co. Kg Hydraulik-Presswerkzeug sowie Verfahren zum Steuern eines Hydraulik-Presswerkzeugs
WO2016196948A1 (fr) * 2015-06-03 2016-12-08 Hydril USA Distribution LLC Détecteur de volume d'accumulateur utilisant une mesure optique
CN107605851A (zh) * 2017-09-18 2018-01-19 沈阳飞机工业（集团）有限公司 液压压套装置
US11772349B2 (en) * 2018-10-25 2023-10-03 Emerson Professional Tools Ag Pressing tool for pressing workpieces

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113685404B (zh) * 2020-05-19 2022-05-31 华为技术有限公司 按压装置

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3840395A1 (de) * 1987-12-04 1989-06-15 Amada Co Verfahren und vorrichtung zum steuern eines hubes einer presse
EP0398012A2 (fr) * 1989-05-12 1990-11-22 Robert Bosch Gmbh Cylindre de travail avec un capteur pour la détermination de la position du piston
EP0417024A1 (fr) * 1989-09-05 1991-03-13 Philippe Robert Louis Roudaut Ensemble piston-cylindre muni de moyens de détermination et de validation de la position du piston
US5113679A (en) * 1990-06-27 1992-05-19 Burndy Corporation Apparatus for crimping articles
EP0591614A1 (fr) * 1992-07-24 1994-04-13 Festo KG Vérin

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3840395A1 (de) * 1987-12-04 1989-06-15 Amada Co Verfahren und vorrichtung zum steuern eines hubes einer presse
EP0398012A2 (fr) * 1989-05-12 1990-11-22 Robert Bosch Gmbh Cylindre de travail avec un capteur pour la détermination de la position du piston
EP0417024A1 (fr) * 1989-09-05 1991-03-13 Philippe Robert Louis Roudaut Ensemble piston-cylindre muni de moyens de détermination et de validation de la position du piston
US5113679A (en) * 1990-06-27 1992-05-19 Burndy Corporation Apparatus for crimping articles
EP0591614A1 (fr) * 1992-07-24 1994-04-13 Festo KG Vérin

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6244085B1 (en) 1999-02-11 2001-06-12 Von Arx Ag Pressing tool
DE202008002200U1 (de) 2008-02-15 2009-03-26 Novopress Gmbh Pressen Und Presswerkzeuge & Co. Kg Handgeführtes Pressgerät
DE102010049946A1 (de) * 2010-10-28 2012-05-03 Novopress Gmbh Pressen Und Presswerkzeuge & Co. Kg Hydraulik-Presswerkzeug sowie Verfahren zum Steuern eines Hydraulik-Presswerkzeugs
DE102010049946B4 (de) * 2010-10-28 2013-04-18 Novopress Gmbh Pressen Und Presswerkzeuge & Co. Kg Hydraulik-Presswerkzeug sowie Verfahren zum Steuern eines Hydraulik-Presswerkzeugs
US9873187B2 (en) 2010-10-28 2018-01-23 Novopress Gmbh Pressen Und Presswerkzeuge & Co. Kg Hydraulic pressing tool and method for controlling a hydraulic pressing tool
WO2016196948A1 (fr) * 2015-06-03 2016-12-08 Hydril USA Distribution LLC Détecteur de volume d'accumulateur utilisant une mesure optique
CN107810332A (zh) * 2015-06-03 2018-03-16 海德里尔美国配送有限责任公司 使用光学测量的蓄能器容量检测器
US10240618B2 (en) 2015-06-03 2019-03-26 Hydril USA Distribution LLC Accumulator volume detector using an optical measurement
CN107810332B (zh) * 2015-06-03 2020-04-03 海德里尔美国配送有限责任公司 使用光学测量的蓄能器容量检测器
CN107605851A (zh) * 2017-09-18 2018-01-19 沈阳飞机工业（集团）有限公司 液压压套装置
US11772349B2 (en) * 2018-10-25 2023-10-03 Emerson Professional Tools Ag Pressing tool for pressing workpieces

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Publication number Publication date
DE59810023D1 (de) 2003-12-04

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