EP3643422A1 - Machine de pressage destinée au pressage d'outils - Google Patents

Machine de pressage destinée au pressage d'outils Download PDF

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Publication number
EP3643422A1
EP3643422A1 EP18202607.0A EP18202607A EP3643422A1 EP 3643422 A1 EP3643422 A1 EP 3643422A1 EP 18202607 A EP18202607 A EP 18202607A EP 3643422 A1 EP3643422 A1 EP 3643422A1
Authority
EP
European Patent Office
Prior art keywords
sensor
relief valve
pressure relief
press machine
hydraulic
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.)
Granted
Application number
EP18202607.0A
Other languages
German (de)
English (en)
Other versions
EP3643422B1 (fr
EP3643422B8 (fr
Inventor
Matthias Ruch
Rudolf Kreuzer
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.)
Emerson Professional Tools AG
Original Assignee
Von Arx 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 Von Arx AG filed Critical Von Arx AG
Priority to EP18202607.0A priority Critical patent/EP3643422B8/fr
Priority to US16/663,622 priority patent/US11772349B2/en
Priority to CN201911022317.4A priority patent/CN111098540B/zh
Publication of EP3643422A1 publication Critical patent/EP3643422A1/fr
Publication of EP3643422B1 publication Critical patent/EP3643422B1/fr
Application granted granted Critical
Publication of EP3643422B8 publication Critical patent/EP3643422B8/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • 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
    • B30B1/32—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 plungers under fluid pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/08—Regulating by delivery pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/16—Control arrangements for fluid-driven presses
    • B30B15/166—Electrical control arrangements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D39/00—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders
    • B21D39/04—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders of tubes with tubes; of tubes with rods
    • B21D39/048—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders of tubes with tubes; of tubes with rods using presses for radially crimping tubular elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B27/00—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
    • B25B27/02—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for connecting objects by press fit or detaching same
    • B25B27/026—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for connecting objects by press fit or detaching same fluid driven
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B27/00—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
    • B25B27/02—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for connecting objects by press fit or detaching same
    • B25B27/10—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for connecting objects by press fit or detaching same inserting fittings into hoses
    • 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
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/16—Control arrangements for fluid-driven presses
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B17/00—Pumps characterised by combination with, or adaptation to, specific driving engines or motors
    • F04B17/03—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/02—Stopping, starting, unloading or idling control
    • F04B49/03—Stopping, starting, unloading or idling control by means of valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/06—Control using electricity

Definitions

  • the present invention relates to a press machine, in particular a hand-held press machine, for pressing workpieces, and a method for operating a press machine.
  • press machines are also known for other tasks.
  • press machines are used for pressing, crimping or cutting workpieces, for example in the electrical industry when connecting cable lugs to cables.
  • the press jaws are arranged around the press fitting for pressing.
  • a user presses an operating button and thereby starts an electrically operated hydraulic pump.
  • This creates a pressure in a hydraulic fluid that acts on a working piston.
  • the working piston generates a high pressing force, which is exerted on the surface of the press fitting by means of pressing tongs, so that this is radially compressed and plastically deformed.
  • the plastic deformation of the press fitting securely connects the workpieces, for example the press fitting and pipe.
  • the inner tubes can also experience plastic deformation.
  • the pressing process is usually ended in the case of press machines of the prior art by opening a pressure relief valve when a certain maximum pressure is reached, reducing the hydraulic pressure and returning the working piston to its starting position.
  • the specified maximum pressure ensures that a suitably high pressing force has been exerted on the workpiece in order to ensure sufficient pressing.
  • the operator can release the operating button and switch off the electric motor of the hydraulic pump.
  • Such manual control of the hydraulic pump by the operator can mean an unnecessary consumption of electrical energy and requires that the operator keep the operating button pressed until the end of the pressing process. If the operator releases the operating button before the end of the pressing process, there is no guarantee that the workpieces have already been pressed sufficiently.
  • EP 2 501 523 B1 is a hand-held press device for pressing a press fitting in installation technology and for pressing cable lugs.
  • the pressing tool is connected to an electro-hydraulic conversion device.
  • a brushless electric motor is used as the drive motor.
  • a pressure relief valve opens, causing the engine speed to skyrocket. This increase in the engine speed is recognized by a controller of the pressing device and the electric motor is then switched off.
  • Such a pressing device therefore requires complex monitoring and evaluation of the engine speed.
  • a press machine for pressing workpieces comprising a hydraulic pump, for conveying a hydraulic fluid; an electric motor for driving the hydraulic pump; a working piston which is in hydraulic connection with an outlet of the hydraulic pump; a pressure relief valve which is in hydraulic connection with the outlet of the hydraulic pump and which opens at a certain preset pressure of the hydraulic fluid; an electronic control for controlling the electric motor; and a sensor that monitors the state of the pressure relief valve and outputs an electrical signal that describes the state of the pressure relief valve to the electronic control.
  • the electronic control By monitoring the status of the pressure relief valve through the sensor, the electronic control recognizes the status of the pressure relief valve, for example whether it is closed or open, and can control the press machine accordingly.
  • the pressing process can thus be carried out automatically to the end by the control unit operating the electric motor until the pressure relief valve is triggered and then the electric motor stops. This ensures that the necessary pressing pressure is reached and electrical energy is saved since the electric motor is only operated as long as necessary. This is particularly advantageous in the case of battery-operated pressing devices.
  • it can be recognized whether the required pressing pressure has been reached or not with manual control of the pressing machine by the user.
  • the pressure relief valve preferably has a movable valve piston which is biased against a valve seat by means of a spring.
  • a spring-biased pressure relief valve is particularly reliable in operation and allows the desired release pressure to be set by adjusting the spring preload.
  • the sensor preferably has a magnetic sensor which is influenced by a magnet on the pressure relief valve. Magnetic actuation of the sensor is particularly reliable and easy to implement. All that is required is to attach a magnet to a movable part of the pressure relief valve, such as the valve piston. The magnet then moving with the valve piston acts on the magnetic sensor via its magnetic field without a mechanical or electrical contact being necessary for this. This increases the reliability of the detection and of the press as a whole.
  • the Hall sensor itself can also contain a magnet, in which case the detection takes place by changing the magnetic field, e.g. by the movement of a ferro-magnetic piston
  • the magnetic sensor preferably has a Hall sensor.
  • the magnetic sensor can have a Hall sensor that can detect a magnetic field very reliably.
  • the output signal is dependent on the size of the magnetic field, so that the distance between the magnet and the Hall sensor can be recorded continuously. This enables a particularly accurate and reliable detection of the state of the pressure relief valve, since both the closed and the open state of the pressure relief valve can be detected by a clear electrical signal.
  • the magnetic sensor preferably has a reed contact.
  • a reed contact is a particularly inexpensive type of magnetic sensor.
  • the magnetic sensor preferably has an inductive sensor.
  • the change in a magnetic field can preferably be detected.
  • the moving magnet on the pressure relief valve preferably induces a voltage in an inductive sensor, for example in a coil. This voltage can be detected by the control.
  • the valve piston preferably has a permanent magnet.
  • the state of the pressure relief valve can be detected particularly easily by means of a permanent magnet on the valve piston.
  • the permanent magnet moves together with the valve piston when the pressure relief valve is opened or closed, as a result of which the magnetic field generated by the permanent magnet is related to a fixed magnetic sensor changes. This magnetic field or the change in the magnetic field can be detected by the magnetic sensor.
  • the valve piston can preferably also contain an inversely arranged magnet, for example a permanent magnet, which, in combination with a further magnetic sensor, increases the security of the signaling.
  • an inversely arranged magnet for example a permanent magnet
  • the open position of the valve piston can be actively detected by the first magnetic sensor and the closed position of the valve piston can be actively detected by the second magnetic sensor.
  • both the normally arranged magnet and the inversely arranged magnet can also be an electromagnet, which only generates a magnetic field after the pressing process has started. This enables the controller to evaluate the signals from the magnetic sensors even in the idle state and compare them with those after starting. This makes it possible to identify and filter out interference signals from external magnetic fields.
  • the sensor preferably has an optical sensor.
  • the state of the pressure relief valve can also be optically detected.
  • An optical sensor is used here, which preferably responds to the change in the incidence of light due to a mechanical movement of the valve piston.
  • a diaphragm could be attached to the valve piston, which enters the space between a fork light barrier when the valve piston moves.
  • the sensor preferably has an electrical switch.
  • An electrical switch is a particularly inexpensive type of sensor.
  • the electrical switch can be arranged such that the valve piston acts directly on the electrical switch when it is displaced.
  • the sensor preferably has a capacitive sensor.
  • the status of the pressure relief valve can also be monitored capacitively.
  • a capacitive sensor can be formed, for example by the valve piston movable part and a fixed electrode forms a fixed part of a capacitive sensor. The distance between the valve piston and the electrode and thus the switching state of the pressure relief valve can then be determined by determining the electrical capacitance between the valve piston and the electrode.
  • the electric motor is preferably a brushless DC motor.
  • a brushless DC motor can be controlled very precisely and is very low-maintenance with high performance.
  • the electronic control system can also monitor the state of the pressure relief valve and determine whether it is closed or open and can control the press machine accordingly.
  • the pressing process can thus be carried out automatically to the end by the control unit operating the electric motor until the pressure relief valve is triggered and then the electric motor stops. This ensures that the necessary pressure is reached.
  • electrical energy is saved since the electric motor is only operated by the control for as long as necessary.
  • the method preferably has the step of determining the distance between a movable part of the pressure relief valve and a part which is fixed with respect to the press machine by the sensor.
  • the state of the pressure relief valve can be determined particularly easily and reliably by means of the distance between a part of the pressure relief valve, in particular the valve piston, and a part which is stationary with respect to the press machine.
  • the sensor can preferably detect both the closed and the open state of the pressure relief valve. This increases the reliability of the control, since the failure of the sensor or a fault in the connection between the sensor and the control can then be detected. In addition, interference from external magnetic fields can be detected and filtered out.
  • two or more sensors can preferably also be used for this purpose.
  • the sensor can preferably continuously detect the distance between the movable part of the pressure relief valve and the part which is stationary with respect to the press machine. A continuous determination of the distance enables the detection threshold for the states of the pressure relief valve to be set electronically. As a result, no mechanical settings on the sensor are necessary.
  • Fig. 1 shows an embodiment of a hydraulic hand press device 10 with hydraulic power transmission unit.
  • an electric motor 20 drives an eccentric 24 connected to it via a gear 22.
  • the electric motor 20 is preferably a brushless DC motor that is supplied by a controller 40 with correspondingly modulated current from a battery or a wired power supply (not shown).
  • a commercially available DC motor 20 with a commutator can also be used.
  • the gearbox 22 reduces the speed of the electric motor 20 and increases the torque for actuating a hydraulic pump 27.
  • the eccentric 24 connected to the gearbox converts the rotary movement of the output shaft of the gearbox 22 into a one-dimensional oscillating motion, around the hydraulic pump 27, which is designed as a piston pump is to drive.
  • the hydraulic pump 27 pumps a hydraulic fluid 70 from a reservoir into a working cylinder 25, as a result of which the hydraulic pressure in the working cylinder 25 increases.
  • the increasing hydraulic pressure presses a working piston 28 movably guided in the cylinder 25 in the illustration of FIG Fig. 1 to the left, in the direction of the fastening area for exchangeable pressing jaws 30 (not in detail shown).
  • the working piston 28 can transmit a very high pressure to the press jaws.
  • the working piston 28 is mechanically connected to rollers 29 which move with the movement of the working piston 28.
  • the rollers 29 move in a conventional manner between inclined ends of press jaws 30, which are thus closed and can plastically deform the workpiece with high force.
  • the hydraulic pressure is transmitted directly proportional to the connected pressing jaw 30, and generates a pressing force directly proportional to the hydraulic pressure on the workpiece.
  • the user can actuate an operating button 41 which is electrically connected to the controller 40.
  • the controller 40 recognizes the actuation of the operating button 40 and then controls the electric motor 20 in a suitable manner, so that it drives the hydraulic pump 27 via the eccentric 24.
  • the hydraulic pump 27 pumps the hydraulic fluid on the output side into the working cylinder 25 in order to move the working piston.
  • the hydraulic pressure has risen to a predetermined maximum pressure at which a secure pressing of the workpieces is ensured.
  • a pressure relief valve 50 opens, as a result of which the hydraulic pressure in the working cylinder 25 is reduced and the working piston 28 returns to its starting position due to a spring preload.
  • the opening of the pressure relief valve 50 when the predetermined pressure is reached is detected by a sensor 60, which is connected to the controller 40 for signaling purposes.
  • the control 40 is thus signaled to open the pressure relief valve 50 so that it can stop the electric motor 20.
  • FIGS Figures 2A and 2B Details of the relief valve 50 and an exemplary sensor 60 are shown in FIGS Figures 2A and 2B shown.
  • Figure 2A shows the pressure relief valve 50 in its closed state.
  • the pressure relief valve 50 comprises a movable valve piston 52, which is biased against a valve seat 51 by means of a spring 56, here a spiral spring.
  • the preload of the spring 56 can be adjusted by means of an adjusting screw 58 in order to thereby set the preset pressure P v at which the pressure relief valve 50 is to open at the end of the pressing process.
  • the pressure relief valve 50 is hydraulically connected to the outlet of the hydraulic pump 27 and therefore experiences the hydraulic pressure which acts on the working cylinder 25. At a pressure P 1 ⁇ P v , the pressure relief valve 50 is closed, the valve piston 52 sealing against the valve seat 51.
  • valve piston 52 has a dynamic pressure surface 57, which causes the pressure relief valve 50 remains open when hydraulic fluid 72 emerges from the annular gap between valve piston 52 and valve seat 51.
  • the pressure in the working cylinder 25 can thus decrease so far and the hydraulic fluid 70 can escape so far that the working piston 28 can move back into its starting position.
  • valve piston 52 has no dynamic pressure surface 57 and the pressure relief valve 50 will close again as soon as sufficient pressure has been released for this.
  • the working cylinder 25 can then be emptied by a separate hydraulic valve (not shown), which can be controlled electrically, for example, by the controller 40.
  • valve piston 52 in a further alternative embodiment (not shown), it is possible for the valve piston 52 to have no dynamic pressure surface 57, and for the controller 40 to hold the valve piston 52 in its open position in a controlled manner, for example by electromagnetic means.
  • valve piston 52 it is possible for the valve piston 52 to have no dynamic pressure surface 57, but to engage mechanically in its open position. The detent can then be released again when the working piston 28 has moved back into its starting position.
  • the state of the pressure relief valve 50 can be monitored by a sensor 60.
  • the sensor 60 outputs an electrical signal to the controller 40 when the pressure relief valve 50 opens after reaching the preset pressure P v .
  • the sensor 60 can also output another signal when the pressure relief valve 50 is closed. It is also possible for the sensor 60 to output a corresponding signal when the pressure relief valve 50 changes from the closed to the open state, or from the open to the closed state.
  • the senor 60 consists of a magnetic sensor which is attached to a fixed housing component 62 and is electrically connected to the controller 40.
  • the sensor 60 reacts to a magnetic field 55 which is generated by a permanent magnet 54 which is arranged at one end of the valve piston 52.
  • the magnetic field 55 between the permanent magnet 54 and the sensor 60 changes when the valve piston 52 moves when the pressure relief valve 50 is opened or closed.
  • the distance between the permanent magnet 54 and sensor 60 changes from a length L 1 in the closed state to a smaller length L 2 in the open state of the pressure relief valve 50.
  • the sensor 60 can have an inductive sensor with an induction coil which, when the magnetic field 55 changes, generates an induced voltage which can be evaluated.
  • controller 40 may integrate the induced voltage to detect a relative change in the signal. This integrated voltage is then compared by the control with a threshold value which is characteristic of the opening of the pressure relief valve 50.
  • the sensor 60 can also have a Hall sensor that reacts to the changes in the magnetic field.
  • the sensor signals can be evaluated in the manner described above.
  • the senor 60 can have a reed contact that opens or closes an electrical contact at a certain strength of the magnetic field 55, that is to say from a certain distance between the permanent magnet 54 and the sensor 60. This switching of the reed contact can be recognized by the controller 40.
  • the senor 60 can also have an optical sensor (not shown) which detects the change in an optical property, for example a change in a light intensity.
  • an optical sensor (not shown) which detects the change in an optical property, for example a change in a light intensity.
  • a diaphragm could be attached to the valve piston 52, which enters the space between a fork light barrier when the valve piston 52 moves when the pressure relief valve 50 is opened.
  • the senor 60 can also have an electrical switch (not shown) which is actuated by the valve piston 52 in a mechanical manner.
  • the electrical switch can be arranged such that the valve piston 52 acts directly on the electrical switch when it is displaced and switches it.
  • the senor 60 can have a capacitive sensor (not shown). With this, the status of the pressure relief valve 50 can also be monitored in a capacitive manner.
  • the controller 40 measures the variable electrical capacitance of a capacitive sensor which is formed, for example, from the valve piston 52 as a movable part and an electrode connected to the housing as a fixed part. Then the distance between valve piston 52 and electrode and thus the switching state of pressure relief valve 50 can be determined by determining the electrical capacitance between valve piston and electrode.
  • the controller 40 controls the pressing process of the press machine 10.
  • the Control 40 stop the movement of the electric motor 20 immediately or after a certain overrun time.
  • the electric motor 20 is automatically switched off by the controller 40 at the end of the pressing process, without the user having to take any action.
  • this increases the user-friendliness of the press machine 10 and reduces the energy consumption.
  • the controller 40 can thereby control the pressing process fully automatically until it has been successfully completed.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Press Drives And Press Lines (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Control Of Presses (AREA)
EP18202607.0A 2018-10-25 2018-10-25 Machine de pressage destinée au pressage d'outils Active EP3643422B8 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP18202607.0A EP3643422B8 (fr) 2018-10-25 2018-10-25 Machine de pressage destinée au pressage d'outils
US16/663,622 US11772349B2 (en) 2018-10-25 2019-10-25 Pressing tool for pressing workpieces
CN201911022317.4A CN111098540B (zh) 2018-10-25 2019-10-25 用于压制工件的压机

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP18202607.0A EP3643422B8 (fr) 2018-10-25 2018-10-25 Machine de pressage destinée au pressage d'outils

Publications (3)

Publication Number Publication Date
EP3643422A1 true EP3643422A1 (fr) 2020-04-29
EP3643422B1 EP3643422B1 (fr) 2023-06-07
EP3643422B8 EP3643422B8 (fr) 2023-07-26

Family

ID=63998611

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18202607.0A Active EP3643422B8 (fr) 2018-10-25 2018-10-25 Machine de pressage destinée au pressage d'outils

Country Status (3)

Country Link
US (1) US11772349B2 (fr)
EP (1) EP3643422B8 (fr)
CN (1) CN111098540B (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113685404A (zh) * 2020-05-19 2021-11-23 华为技术有限公司 按压装置
WO2023005861A1 (fr) * 2021-07-26 2023-02-02 浙江飞越机电有限公司 Structure de détection d'état de soupape de surpression destinée à un outil électrique d'usinage de tuyau hydraulique

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102020110406A1 (de) * 2020-04-16 2021-10-21 Liebherr-Werk Ehingen Gmbh Mobile Bolzenzieheinrichtung

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CN111098540B (zh) 2022-09-06
EP3643422B8 (fr) 2023-07-26
US20200130313A1 (en) 2020-04-30
US11772349B2 (en) 2023-10-03
CN111098540A (zh) 2020-05-05

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