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EP4385666A1 - Dispositif de pressage - Google Patents

Dispositif de pressage Download PDF

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Publication number
EP4385666A1
EP4385666A1 EP22212832.4A EP22212832A EP4385666A1 EP 4385666 A1 EP4385666 A1 EP 4385666A1 EP 22212832 A EP22212832 A EP 22212832A EP 4385666 A1 EP4385666 A1 EP 4385666A1
Authority
EP
European Patent Office
Prior art keywords
sensor
bearing
spindle
pressing device
support surface
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.)
Pending
Application number
EP22212832.4A
Other languages
German (de)
English (en)
Inventor
Urs Heusser
Fabio EICHMÜLLER
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.)
Geberit International AG
Original Assignee
Geberit International 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 Geberit International AG filed Critical Geberit International AG
Priority to EP22212832.4A priority Critical patent/EP4385666A1/fr
Publication of EP4385666A1 publication Critical patent/EP4385666A1/fr
Pending legal-status Critical Current

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Classifications

    • 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

Definitions

  • the present invention relates to a pressing device according to claim 1.
  • Press fittings are often used to connect drinking water pipes, which are pressed with a pressing tool.
  • Such pressing tools comprise a pressing device and a pressing tool that is interchangeably attached to the pressing device, such as a pressing jaw or a pressing loop.
  • the pressing device can be used to apply a pressing force to the pressing jaws, and the press fitting is pressed with the pressing jaws.
  • a piston in the pressing device is extended with high force and acts on the pressing jaws.
  • a pressing tool has become known which has a force sensor in the area of levers of a pressing head.
  • the EN 10 2015 107 302 discloses a pressing tool with a sensor in the area of the pressing contour.
  • the EP3 620 264 a pressing force determination through the measurement of various quantities, such as current consumption or power consumption.
  • the invention is based on the object of specifying a pressing device which overcomes the disadvantages of the prior art.
  • it is an object of the present invention to specify a pressing device which allows a technically simple sensor arrangement for measuring a force acting during a pressing process. This is particularly subject to the requirement of an accurate measurement.
  • a pressing device comprises a drive element with an output section, a spindle gear driven by the output section with a spindle which defines a central axis, and a spindle nut, wherein either the spindle or the spindle nut has a support region via which the spindle or the spindle nut is supported on a bearing point, a press piston driven by the spindle gear, and a tool holder for holding a pressing tool.
  • the pressing device also has a sensor unit for measuring an axial force acting in the direction of the central axis.
  • the sensor unit has a force sensor and a sensor holder.
  • the sensor holder is operatively connected to the spindle and the bearing point or to the spindle nut and the bearing point in such a way that the sensor holder is loaded with the said axial force during a pressing process and that the axial force can be detected with the force sensor.
  • the described arrangement of the sensor holder has the advantage that the sensor holder is loaded with the axial force via the active connection and thus the effective axial force can be recorded by the sensor. The measurement can therefore be carried out very easily.
  • the recorded axial force can be further processed in various ways.
  • the pressing process can be controlled and/or recorded.
  • an effectively occurring force is recorded by the sensor, which means an accurate measurement of the axial force.
  • the axial force does not have to be derived from other quantities.
  • the axial force is the force that acts on the spindle or spindle nut during a pressing process. That is, it is the force that is transferred from the spindle or spindle nut to the pressing tool.
  • actively connected refers to a direct or indirect mechanical connection or support.
  • the press piston acts on the pressing tool arranged in the tool holder.
  • the press piston can have pressing rollers for this effect, for example.
  • the pressing tool can be a pressing jaw or a pressing loop.
  • the support area is preferably designed as a shoulder which extends radially away from the spindle or the spindle nut.
  • the drive unit can comprise a gear that reduces or increases the movement emitted by the drive element.
  • the drive unit preferably comprises an electric motor.
  • the pressing device can also comprise a hydraulic or pneumatic motor as a drive element.
  • the spindle and the spindle nut are connected to each other via a thread.
  • the spindle nut is mounted so that it can be moved in the direction of the central axis with respect to a rotation around the central axis.
  • the spindle nut performs a longitudinal movement in the direction of the central axis.
  • the spindle nut then acts on the press piston.
  • the spindle nut has the support area and is supported at the bearing point
  • the spindle is mounted so that it can be moved in the direction of the central axis with respect to a rotation around the central axis.
  • the spindle nut rotates
  • the spindle performs a longitudinal movement in the direction of the central axis.
  • the spindle then acts on the press piston.
  • the sensor holder is arranged between the bearing point and the support area.
  • an axial bearing is also arranged between the bearing point and the support area, such that the spindle or the spindle nut is supported via the axial bearing with respect to forces acting in the direction of the central axis or with respect to the axial force at the bearing point.
  • the sensor holder is in contact with the axial bearing in such a way that the axial force can be introduced into the sensor holder.
  • the axial bearing is in contact with the support area and the sensor holder is in contact with the axial bearing and the bearing point. This means that, viewed in the direction of the central axis, the axial bearing is connected to the support area and the axial bearing is connected to the sensor holder, which then rests on the bearing point.
  • the sensor holder is in contact with the support area and the axial bearing is in contact with the sensor holder and the bearing point. This means that, viewed in the direction of the central axis, the support area is connected to the sensor holder and the axial bearing, which then rests on the bearing point, is connected to the sensor holder.
  • the axial bearing is an axial ball bearing with a first bearing ring and a second bearing ring and rolling elements arranged between the bearing rings.
  • the sensor receptacle is ring-shaped with a central opening, wherein the sensor receptacle has a first support surface and a second support surface.
  • the sensor holder is designed as a ring.
  • the sensor holder has a cylindrical outer surface extending around the central axis, from which a first ring surface and a second ring surface, which is axially spaced from the first ring surface, extend to the opening.
  • the first and second ring surfaces can have stepped surface areas.
  • the said support surfaces are such areas.
  • the first bearing ring is in contact with the support area
  • the second bearing ring is in contact with the first support surface
  • the second support surface is in contact with the bearing point.
  • the first support surface is in contact with the support region
  • the second support surface is in contact with the first bearing ring
  • the second bearing ring is in contact with the bearing point.
  • the first support surface is arranged at a distance from the second support surface in the direction parallel to the central axis and in the direction transverse to the central axis.
  • the first support surface is on one of the two ring surfaces of the annular sensor holder and the second support surface is on the other of the two ring surfaces of the arranged in a ring-shaped sensor holder.
  • the support surfaces are designed as annular surfaces, wherein the annular surfaces preferably extend concentrically around the central axis.
  • the first support surface has an outer diameter which is smaller than an inner diameter of the second support surface.
  • the support surfaces have no interruption. This means that the support surfaces run completely around the central axis.
  • the force sensor is arranged on a sensor surface on the sensor holder, wherein the sensor surface preferably lies in a plane extending at right angles to the central axis.
  • the sensor surface is arranged and designed such that the sensor surface experiences a bending load when the said axial force is applied.
  • said sensor surface is located radially and axially offset to the central axis from the first support surface and said sensor surface is located radially and axially offset to the central axis from the second support surface.
  • the said sensor surface is located on the side of the first support surface and thus opposite the second support surface. In another variant, the said sensor surface is located on the side of the second support surface and thus opposite the first support surface.
  • the force sensor is a strain gauge and/or an inductive force transducer and/or a piezoelectric force transducer.
  • the pressing device further comprises a housing which provides the said bearing point directly or indirectly.
  • a direct bearing point is to be understood as meaning that the housing itself provides the bearing point.
  • an indirect bearing point is to be understood as meaning that the bearing point is provided by a further element, such as a rolling bearing, which is supported on the housing.
  • the sensor holder is axially and radially fixed in a bearing holder in the housing.
  • the bearing point forms part of the bearing holder, and the sensor holder is in contact with an outer surface, with the second support surface via the bearing point and with a further surface with the bearing holder.
  • the pressing device 1 comprises a drive element 2, a spindle gear with a spindle 4 and a spindle nut 24, a pressing piston 7 and a tool holder 8 for Accommodates a pressing tool not shown in the figures.
  • the pressing device 1 also comprises a sensor unit 9, which is designed to measure an axial force, as explained below.
  • the pressing device in the embodiment shown also comprises a housing 20, on which the aforementioned elements are arranged.
  • the drive element 2 has an output section 3.
  • the drive element acts on the spindle 4.
  • the output section 3 acts on the spindle nut 24.
  • the output section 3 and the spindle 4 or the output section 3 and the spindle nut 24 are connected to one another via a rotationally fixed connection.
  • a rotational movement can be transmitted from the drive element 2 to the spindle 4 via the connection between the output section 3 and the spindle 4.
  • a rotational movement can be transmitted from the drive element 2 to the spindle nut 24 via the connection between the output section 3 and the spindle nut 24.
  • the drive element 2 is preferably an electric motor. Other types of motors are also conceivable.
  • the spindle 4 defines a central axis M. Furthermore, in the first embodiment, the spindle 4 has a support region 5, via which the spindle 4 is supported at a bearing point 6. In the second embodiment, the spindle nut 24 has the support region 5. In the embodiments shown, the support region 5 is a flange that extends completely around the central axis M and radially away from the spindle 4 or the spindle nut 24.
  • the press piston 7 is connected to the spindle 4 via the spindle nut 24.
  • the spindle nut 24 and the press piston 7 are displaced in the direction of the central axis M.
  • the press piston 7 is connected to the spindle nut 24 via the spindle 4.
  • the spindle nut 24 rotates, the spindle 4 and the press piston 7 are displaced in the direction of the central axis M.
  • press piston 7 is moved into the tool holder 8 due to the movement of the spindle or spindle nut during a pressing process and acts on the pressing tool through this movement.
  • press rollers 25 are arranged in the embodiment shown.
  • the sensor unit 9 is arranged such that a force acting in the direction of the central axis M Axial force F, which acts on the spindle 4 or the spindle nut 24 during a pressing process, can be measured.
  • the sensor unit 9 has a force sensor 10 and a sensor holder 11.
  • the sensor holder 11 is operatively connected to the spindle 4 and the bearing point 6 or to the spindle nut 24 and the bearing point 6 in such a way that the sensor holder 11 is loaded with the said axial force F during a pressing process and that the axial force F can be detected with the force sensor 10.
  • the sensor holder 11 is arranged between the bearing point 6 and the support area 5, whereby the axial force can be introduced from the support area 5 via the sensor holder 11 into the bearing point 6.
  • an axial bearing 12 is also arranged between the bearing point 6 and the support area 5.
  • the spindle 4 or the spindle nut is supported via the axial bearing 12 with respect to the acting axial force at the bearing point 6.
  • the sensor holder 11 is in contact with the axial bearing 12 in such a way that the axial force F can be introduced into the sensor holder 11.
  • the support area 5 rests directly on the axial bearing 12 and the axial bearing 12 rests directly on the sensor holder 11.
  • the axial bearing 12 here is an axial ball bearing with a first bearing ring 13 and a second bearing ring 14 as well as rolling elements 15 arranged between the bearing rings 13, 14.
  • the sensor holder 11 is annular in the embodiment shown and has a central opening 16.
  • the spindle 4 or the spindle nut 24 preferably extend through the central opening 16.
  • the sensor holder also has a first support surface 17 and a second support surface 18.
  • the support surfaces 17, 18 are designed as ring surfaces, which each extend in a ring around the central axis M in a plane running transversely to the central axis M.
  • the support surfaces 17, 18 are offset from one another radially, i.e. transversely to the central axis M, as well as axially, i.e. in the direction of the central axis M.
  • the first support surface 17 has an outer diameter which is smaller than the inner diameter of the second Support surface 18.
  • the second support surface 18 is arranged radially outside of the first support surface 17.
  • the first bearing ring 13 is, as mentioned, in contact with the support area 5 of the spindle 4 or the spindle nut 24 and the second bearing ring 14 is in contact with the first support surface 17.
  • the second support surface 18 is in contact with the bearing point 6.
  • the force sensor 10 is arranged on a sensor surface 19 on the sensor holder 11.
  • the sensor surface 19 is preferably located in a plane extending at right angles to the central axis M. In the embodiment shown, the sensor surface 19 is located on the side of the first support surface 17.
  • the sensor surface 19 is axially and radially offset from the first support surface 17. The axial offset is such that a type of cavity can be created in which the pressure sensor 10 can be arranged.
  • the sensor holder 11 also has an outer surface 22 and a further surface 23.
  • the further surface 23 is ring-shaped with larger diameters than the first ring surface 17 and essentially serves as a bearing surface.
  • the housing 20 and the bearing point 6 form a bearing holder 21 for the sensor holder 11.
  • the outer surface 22 is cylindrical and fits into the bearing holder 21 of the housing 20.
  • the further surface 23 is also mounted on the housing 20 and the second ring surface 18 is supported on the bearing point 6, as mentioned above.
  • the bearing point 6 is provided indirectly by the housing 20.
  • the second support surface 18 stands here on a shoulder 27 on the housing via the outer rings of further ball bearings 26.
  • the bearing point 6 is provided directly by the housing 20, so that the second support surface 18 is supported directly on the housing 20.
  • the housing 20 is designed in several parts with a front part 28 and a rear part 29.
  • the front part 28 and the rear part 29 are connected to one another here via a threaded connection 30.
  • the aforementioned shoulder 27 is provided by the rear part 29 and the rest of the bearing holder 21 is provided by the front part 28.
  • the force sensor 10 has a sensor cable 31, which is led away through an interruption 32 in the further surface 23 transversely to the sensor holder 11.
  • the preferred design is as follows: the central opening 16 is followed by the first support surface 17, which extends in a ring shape and concentrically to the central opening 16 around the central opening 16.
  • the first support surface 17 is followed by the sensor surface 19.
  • the sensor surface 19 is also ring-shaped and is offset from the first support surface 17 in the direction of the central axis M. When installed, the sensor surface 19 is spaced from the axial bearing 12, while the first support surface is in contact with the axial bearing 12. Furthermore, the sensor surface 19 extends concentrically to the central opening 16 and concentrically to the first support surface 16 completely around the central axis M.
  • the force sensor 10 is placed on the sensor surface 19.
  • the further surface 23 then runs concentrically to the sensor surface 19 and lies in the same plane as the first support surface 17.
  • the plane jump between the first support surface 17 and the sensor surface 19 occurs in the cross section through the central axis M essentially at right angles to the support surface 17 or to the sensor surface 19. The same applies to the plane jump between the sensor surface 19 and the further surface 23.
  • the central opening 16 is adjoined by a surface 33 which extends around the central opening 16 in a ring shape and concentrically to the central opening 16.
  • the surface 33 is then adjoined by the second support surface 18.
  • the Surface 33 is located in the direction of the central axis M at a smaller distance from the first support surface 17 than the second support surface 18.
  • the transition from surface 33 to the second support surface 18 is arranged here at an angle to the central axis in the cross section through the central axis. The transition therefore has a conical shape, which can reduce the stress peaks.
  • the sensor holder is preferably made of steel, such as 100Cr6 or 42CrMo4.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Force Measurement Appropriate To Specific Purposes (AREA)
EP22212832.4A 2022-12-12 2022-12-12 Dispositif de pressage Pending EP4385666A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP22212832.4A EP4385666A1 (fr) 2022-12-12 2022-12-12 Dispositif de pressage

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP22212832.4A EP4385666A1 (fr) 2022-12-12 2022-12-12 Dispositif de pressage

Publications (1)

Publication Number Publication Date
EP4385666A1 true EP4385666A1 (fr) 2024-06-19

Family

ID=84488771

Family Applications (1)

Application Number Title Priority Date Filing Date
EP22212832.4A Pending EP4385666A1 (fr) 2022-12-12 2022-12-12 Dispositif de pressage

Country Status (1)

Country Link
EP (1) EP4385666A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10051010A1 (de) 2000-10-14 2002-04-18 Klauke Gmbh Gustav Kraftmesswerkzeug
WO2002102555A1 (fr) * 2001-06-19 2002-12-27 Von Arx Ag Outil de moulage par compression dote d'une broche destinee a la compression d'elements de couplage
DE102015107302A1 (de) 2015-05-11 2016-11-17 Viega Gmbh & Co. Kg Presswerkzeug und Verfahren zum Verbinden von Werkstücken mit Kraftmessung
EP3620264A1 (fr) 2018-09-06 2020-03-11 Von Arx AG Machine à presser dotée d'un entrainement commandé en fonction des données de pressage enregistrées

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10051010A1 (de) 2000-10-14 2002-04-18 Klauke Gmbh Gustav Kraftmesswerkzeug
WO2002102555A1 (fr) * 2001-06-19 2002-12-27 Von Arx Ag Outil de moulage par compression dote d'une broche destinee a la compression d'elements de couplage
DE102015107302A1 (de) 2015-05-11 2016-11-17 Viega Gmbh & Co. Kg Presswerkzeug und Verfahren zum Verbinden von Werkstücken mit Kraftmessung
EP3620264A1 (fr) 2018-09-06 2020-03-11 Von Arx AG Machine à presser dotée d'un entrainement commandé en fonction des données de pressage enregistrées

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