EP4320690A1 - Presse à sertir et procédé de fabrication d'une liaison sertie - Google Patents

Presse à sertir et procédé de fabrication d'une liaison sertie

Info

Publication number
EP4320690A1
EP4320690A1 EP22715771.6A EP22715771A EP4320690A1 EP 4320690 A1 EP4320690 A1 EP 4320690A1 EP 22715771 A EP22715771 A EP 22715771A EP 4320690 A1 EP4320690 A1 EP 4320690A1
Authority
EP
European Patent Office
Prior art keywords
bearing
crimping
drive
crimping press
shaft
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
EP22715771.6A
Other languages
German (de)
English (en)
Inventor
Marco Häfner
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.)
Schleuniger AG
Original Assignee
Schleuniger 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 Schleuniger AG filed Critical Schleuniger AG
Publication of EP4320690A1 publication Critical patent/EP4320690A1/fr
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
    • H01R43/04—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for forming connections by deformation, e.g. crimping tool
    • H01R43/048—Crimping apparatus or processes
    • 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
    • B30B1/26—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 cams, eccentrics, or cranks
    • B30B1/266—Drive systems for the cam, eccentric or crank axis
    • 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
    • B30B1/26—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 cams, eccentrics, or cranks
    • 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
    • B30B1/26—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 cams, eccentrics, or cranks
    • B30B1/261—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 cams, eccentrics, or cranks by cams

Definitions

  • the invention relates to a crimping press according to claim 1 and a method for producing a crimped connection according to claim 11 and the use of a bearing in the crimping drive device of a crimping press according to claim 12.
  • At least two crimping tools which are arranged in the crimping press, are typically used to produce a crimped connection in a crimping press.
  • the two crimping tools are arranged opposite one another on a vertically movable pressing jaw and on a further, generally static, pressing jaw, which is also referred to as an anvil.
  • the area between the two crimping tools is typically referred to as the crimping area.
  • a crimp connection usually has a single-wire or multi-wire cable and a connecting element, such as a plug, an eyelet or a socket. During a crimping process, the cable is at least partially arranged on the connecting element and by plastically deforming a portion of the connecting element with the
  • a crimping drive device for the movement of the vertically movable pressing jaw in known crimping presses, a crimping drive device is usually provided, which usually converts a motor-driven rotary movement of a shaft into the desired linear vertical movement of the pressing jaw.
  • eccentric kinematics or cam kinematics are used here.
  • EP 2843779 A1 discloses a crimping press with cam kinematics, in which a cam roller rolls on a camshaft in order to move a first pressing jaw.
  • the disadvantage is that there is very little space for storing the bearing of the cam roller relative to the pressing jaw. For this reason, this bearing in this crimping press is only implemented with a single roller bearing, typically a needle bearing.
  • EP 3 806 250 A1 discloses a crimping press for producing a crimped connection with eccentric kinematics. The force is transmitted to the press jaw via a connecting rod, which is rotatably mounted on an eccentric shaft.
  • the object of the present invention to overcome one or more disadvantages of the prior art.
  • the task is to create a crimping press with which a crimped connection can be produced with improved precision.
  • Another object is to create a crimping press that creates a crimped connection with improved precision and to create improved precision through the use of a first bearing.
  • Crimp drive device comprises a drive element and a drive shaft for moving the drive element, and at least one rotatable shaft for moving the first press jaw, and at least one first bearing on which the rotatable shaft is rotatably mounted.
  • the first bearing comprises at least one ball bearing and at least one needle bearing.
  • the at least one ball bearing means that the bearing can now also absorb axial forces. This prevents the two mutually rotatably mounted elements, for example a drive shaft designed as an eccentric shaft and a drive element designed as a connecting rod, from shifting relative to one another in the axial direction, which reduces the bearing play of the entire crimping drive device and thus the
  • the at least one needle bearing absorbs the radial forces and is much more compact than a ball bearing with a comparable radial load capacity. This significantly reduces the friction losses in the crimping drive device, so that the combination of the at least one ball bearing and the at least one needle bearing further improves the precision of the crimping process. In addition, with a suitable dimensioning of the at least one ball bearing, the installation space additionally required in the crimping drive device is reduced, which enables an improved compact design.
  • the at least one ball bearing and the at least one needle bearing of the first bearing are preferably arranged adjacent to one another, so that a further improved compact design is also achieved is allowed in the axial direction.
  • the at least one ball bearing and the at least one needle bearing can be arranged next to one another and possibly touch one another, or be spaced a few millimeters apart.
  • the first bearing comprises a further ball bearing, which is arranged adjacent to the at least one needle bearing.
  • the at least one ball bearing is seated on one end face of the at least one needle bearing and the other ball bearing is seated on the second end face of the needle bearing, so that the axial forces can be better absorbed by the first bearing.
  • the diameter of the ball bearings can be reduced if necessary, which also contributes to compactness.
  • the at least one ball bearing and the at least one needle bearing of the first bearing are preferably in a common one
  • Bearing housing arranged.
  • the common bearing housing accommodates the balls of the at least one ball bearing and the needles of the at least one needle bearing, so that a more compact design and simple assembly of the first bearing on the rotatable shaft is possible and cost savings in production are made possible.
  • bearing housing is understood in this context as the entirety of the inner and outer ring of a rolling bearing, with at least one of these two rings also being able to be made in several parts, for example with the outer ring in one piece and the inner ring in two parts, with one
  • Separation point in the ball of the at least one ball bearing may be present.
  • the at least one needle bearing preferably has a plurality of needles which have a length/diameter ratio of 2.5 to 10. As a result, these bearings enable a very compact design while at the same time absorbing high forces in the radial direction to the rotatable shaft.
  • the first bearing is preferably arranged in the drive element, in the first pressing jaw, or in the drive shaft.
  • the drive element is thus defined or determined axially relative to the first pressing jaw. This leads to an improvement in crimping precision due to the reduced bearing clearance in the rotating shaft bearing.
  • the first bearing is arranged in the drive shaft and one end of the rotatable shaft is rotatably mounted in the first bearing, and the second end of the rotatable shaft is pressed into the drive element so that it is held there stably.
  • the first bearing is arranged in the drive element and one end of the rotatable shaft is rotatably mounted in the first bearing, and the second end of the rotatable shaft is pressed into the drive shaft so that it is held there stably.
  • the drive element is preferably a connecting rod or a cam roller, so that a motor-driven rotary movement of the drive shaft can easily be converted into the desired linear vertical movement of the first pressing jaw.
  • the connecting rod includes a further rotatable shaft which is rotatably mounted in a further bearing and also includes at least one ball bearing and at least one needle bearing.
  • the connecting rod is thus axially defined or determined in both the first and in the further bearing relative to the drive shaft and relative to the first pressing jaw, with the entire crimping drive device being overdetermined by one degree of freedom.
  • the drive shaft is preferably an eccentric shaft or a camshaft.
  • the version with eccentric kinematics, i.e. with an eccentric shaft and connecting rod enables power to be transmitted to the pressing jaw in both directions, which means that a passive force element for generating a restoring force can be dispensed with.
  • the connecting rod can be stored with at least two bearings.
  • a passive force element is preferably present, with which a force in the direction of the drive shaft can be generated in the area of the first press jaw or in the area of the drive element.
  • the passive force element ensures contact between cam roller and camshaft, so that an improved crimp connection can be produced.
  • the passive force element is a return spring or a magnet.
  • the passive force element is preferably connected to a connection structure of the crimping press. There is preferably a guide device for guiding the first pressing jaw along its working path.
  • the first pressing jaw is guided linearly along the guide device and has a guide section which engages in a guide rail of the guide device.
  • a precise movement of the first press jaw towards the second press jaw is thus possible, with this movement being able to be carried out reproducibly due to the first bearing, since the bearing play is improved.
  • the guide device is a sliding guide device.
  • a method according to the invention for producing a crimped connection with a crimping press, as described here enables the first press jaw to be moved precisely towards the further press jaw or towards the second press jaw, so that a reproducible crimped connection can be produced.
  • a use of a bearing according to the invention consists of at least one ball bearing and at least one needle bearing in a crimping drive device of a crimping press.
  • the at least one ball bearing means that the bearing can now also absorb axial forces. This prevents the two elements that are rotatably mounted relative to one another, for example a drive shaft designed as an eccentric shaft and a drive element designed as a connecting rod, from shifting relative to one another in the axial direction, which reduces the bearing play of the entire crimping drive device and thus the repeatability and thus the precision and quality is improved during crimping.
  • the at least one needle bearing absorbs the radial forces and is much more compact than a ball bearing with a comparable radial load capacity. The space required in the crimping drive device is thus reduced, which enables an improved, compact design.
  • FIG. 1 shows a first embodiment of a crimping press according to the invention in a schematic sectional view
  • FIG. 2 shows a further embodiment of a crimping press according to the invention in a schematic sectional view
  • FIG. 3a shows the crimping press according to FIG. 1 in a front view, in a first position
  • FIG. 3b shows the crimping press according to FIG. 1 in a front view, in a second position
  • FIG. 4 shows a further embodiment of a crimping press according to the invention in a schematic sectional view
  • FIG. 5a shows the crimping press according to FIG. 4 in a front view, in a first position
  • FIG. 5b shows the crimping press according to FIG. 4 in a front view, in a second position
  • 1 shows a crimping press 20 with a connection structure 27 and a crimping area 25, in which two crimping tools 65, 75 are arranged on one pressing jaw 60, 70 and are moved relative to one another to produce a crimped connection.
  • the lower crimping tool 75 also known as the "anvil”
  • the upper crimping tool 65 is arranged on the upper press jaw 60, which is vertically movable with the aid of a crimping drive device 26, relative to the
  • the crimping drive device 26 comprises a crimping drive 30, which actively rotates a drive shaft 40 about its axis, a drive element 50 designed as a connecting rod, and other elements for mechanical force and torque transmission, namely the rotatable shafts 42, 52, the bearings 31, 41, 51 and a compensating clutch 301.
  • the crimping drive 30 is connected to the
  • Connection structure 27 connected and preferably designed as an electric motor with flanged planetary gear and preferably includes a rotary encoder. Alternative motors or drives that are used for crimping presses can also be used.
  • the crimping drive 30 is electrically connected to a control and regulation device, which in turn communicates with a central controller of the crimping press 20 and/or a higher-level machine or system controller (not shown). This crimping drive 30 rotates the drive shaft 40, with misalignments typically resulting from assembly and/or manufacturing tolerances be compensated by a compensating clutch 301.
  • the drive shaft 40 is supported in the connecting structure 27 so that it can rotate and is axially defined, with the aid of the bearing 31, designed here as a pair of two tapered roller bearings 311, 312 in an O arrangement.
  • "Axial” in this context means: parallel to the axis of rotation of the respective rotatable shaft.
  • the axes of rotation of the drive shaft 40 and the rotatable shafts 42, 52 are aligned parallel to one another and parallel to the cable axis X, which is predetermined by the longitudinal extension of the cable during the crimping process.
  • the drive element 50 designed as a connecting rod is rotatably mounted relative to the drive shaft 40, the axis of rotation of the connecting rod 50 and the axis of rotation of the drive shaft 40 being arranged parallel to one another and offset by the center distance or the eccentricity E.
  • the drive shaft 40 is also usually called an eccentric shaft by those skilled in the art, the associated kinematics are called eccentric kinematics and the crimping press 20 driven in this way is called an eccentric press.
  • the connecting rod 50 is rotatably mounted relative to the press jaw 60 .
  • a rotatable shaft 42, 52 is fastened in the connecting rod 50 on both axes of rotation, preferably pressed in, which rotates in a bearing 41, 51 which is connected to the respective neighboring part, i.e. the drive shaft 40 designed as an eccentric shaft and the movable pressing jaw 60
  • the bearing 51 in the movable pressing jaw 60 is designed as a pair of two tapered roller bearings 511, 512 in an O arrangement.
  • the bearing 41 in the eccentric shaft 40 is designed as a fixed/loose bearing, with the fixed bearing 411 designed as a ball bearing and the movable bearing 412 designed as a needle bearing.
  • the two shorter, rotatable shafts 42, 52 are often referred to as "axles" because they do not transmit any torque - in contrast to the drive shaft 40.
  • needle bearing is understood to mean rolling bearings with slim, cylindrical rolling bodies, which are very long compared to their diameter. Typically, the length/diameter ratio is a factor of 2.5 to 10, which is why these rolling elements are also referred to as “needles” and the associated bearing as “needle bearings”. As a result, these bearings enable a very compact design with simultaneous high force absorption in the radial direction and differ from the "normal" cylindrical roller bearings with shorter rollers, often also referred to as “barrel bearings”.
  • FIG. 2 shows an alternative embodiment of a crimping press 20a with an alternative crimping drive device 26a.
  • This uses the same kinematics as the crimping drive device 26 according to FIG. 1.
  • the rotatable shafts 42, 52 are arranged differently, as are the bearings 31a, 41a, 51a and the linear one
  • the bearing 31a of the drive shaft 40a designed as an eccentric shaft in the connecting structure 27 is also implemented here as a fixed-loose bearing, with the fixed bearing 311a designed as a ball bearing and the floating bearing 312a designed as a cylindrical roller bearing or barrel bearing.
  • the rotatable shaft 42a is fixed or pressed into the drive shaft 40a designed as an eccentric shaft and the rotatable shaft 52a is fixed or pressed into the movable press jaw 60a, whereas the associated bearings 41a, 51a are connected to the drive element designed as a connecting rod 50a, or are arranged in the connecting rod 50a.
  • Both bearings 41a, 51a each have a common bearing housing, with both the needle bearing and the ball bearing being arranged in a common bearing housing 43a, 53a or sharing the same inner or outer ring.
  • the bearing 41a between the drive shaft 40 designed as an eccentric shaft and the connecting rod 50 is designed as a combined needle-ball bearing, in which a needle bearing and a ball bearing are combined in a common bearing housing 43a.
  • the term "bearing housing” means the entirety of the inner and outer ring of a roller bearing, whereby at least one of these rings can also be designed in multiple parts, for example with the outer ring in one piece and the inner ring in two parts, with the separation point in the area of the spherical rolling elements .
  • the bearing 51a between the connecting rod 50 and the pressing jaw 60 is also designed with such a combined needle-ball bearing and has a common bearing housing 53a.
  • the linear guide device 61a between the movable pressing jaw 60 and the connecting structure 27 is designed as a recirculating ball guide with a matching rail.
  • the remaining elements of the alternative crimping drive device 26a are functionally and structurally identical to the crimping drive device 26 according to FIG.
  • the additional pressing jaw 70a is guided vertically in an additional guide device 71a and can be moved with the aid of an additional crimping drive device 72a.
  • This further crimping drive device 72a is shown only schematically by a block arrow.
  • eccentric or cam kinematics are also conceivable here, ie similar to those described for the crimping drive devices 26, 26a, 26b (see FIG. 4).
  • alternative drive kinematics with a toggle lever or a wedge and/or the associated drive element designed as a simple pneumatic cylinder are also possible here, as described by way of example in EP 3 806 250 A1.
  • embodiments of the crimping press shown above are possible, which include a wide variety of combinations and intermediate variants with the elements of the two crimping presses 20, 20a shown, for example with a connecting rod, which has a bearing pressed in on one side and a shaft on the other side, or with a further bearing as described above with a ball bearing and a needle bearing between the eccentric shaft and the connecting structure.
  • a spherical roller bearing can also be used as a fixed bearing instead of the ball bearing.
  • the arrangement of a pair of tapered roller bearings in an X arrangement is also conceivable.
  • the crimping drive device 26 can also be combined with a movable lower pressing jaw 70a. It is also possible to use a plain bearing for the storage between the connecting rod and the press jaw.
  • FIG. 3a shows the upper pressing jaw 60 of the crimping press 20 in a middle position and FIG. 3b shows it in the crimping position.
  • the drive shaft 40 which is designed as an eccentric shaft, is rotated 90° clockwise and the driving force is transmitted to the pressing jaw 60 with the aid of the connecting rod 50, with the connecting rod 50 being located both in the eccentric shaft 40 and in the pressing jaw 60 is rotatably mounted with the aid of the two bearings 41, 51 and the rotatable shafts 42, 52.
  • FIG. 4 shows a further alternative embodiment of a crimping press 20b with an alternative crimping drive device 26b.
  • This uses cam kinematics in which there is no connecting rod with the associated shafts and bearings. Instead, a drive element 50b designed as a cam roller rolls on a drive shaft 40b designed as a camshaft, which is rotatably mounted about the movable pressing jaw 60b.
  • the outer contour of the drive shaft 40b designed as a camshaft is designed acentrically to its axis of rotation (see Fig. 5), whereby the distance N, NI (Fig. 5a) between the axes of rotation of the camshaft 40b and the cam roller 50b changes when the camshaft 40b is rotated.
  • N, NI Fig. 5a
  • a passive force element 62b is provided, here shown as a return spring between the movable pressing jaw 60b and the connecting structure 27, preferably designed as a spiral compression spring.
  • a magnet can also be used as a passive force element 62b and/or the camshaft and/or the cam roller can be supplemented with magnetic adhesive elements.
  • the rotatable shaft 52b for the cam roller 50b is fixed to or pressed into the press jaw 60b.
  • the bearing 51b is attached to or pressed into the cam roller 60b.
  • this bearing 51b is designed as a combined needle and ball bearing, similar to the bearings 41a, 51a in Figure 2.
  • bearing 51b it is also possible to design the bearing 51b as a combination with two separate roller bearings, in separate ones
  • Bearing housings similar to those shown in FIG. 1 for the bearing 41. It is also possible to fasten the bearing in the pressing jaw and the shaft in the cam roller, in which case the shaft and cam roller can also be designed as a common rotating part.
  • the remaining elements of the alternative crimping drive device 26b are functionally and structurally identical to those of the crimping drive device 26.
  • FIG. 5a shows the upper pressing jaw 60b of the crimping press 20b in a middle position and FIG. 5b shows it in the crimping position.
  • the drive shaft 40b which is designed as a camshaft, is rotated 90° clockwise and the drive force is transmitted to the pressing jaw 60b with the aid of the cam roller 50b rolling on it, with the cam roller 50b being rotatably mounted in the pressing jaw 60b. by means of bearing 51 and rotatable shaft 52. Contact between cam roller 50b and camshaft 40b is ensured by passive force element 62b.
  • 311a roller bearing tape roller bearing, fixed bearing, ball bearing
  • 312a roller bearing tapeered roller bearing, floating bearing, cylindrical roller bearing
  • 51, 51a-b bearing pitch of bearings, combined needle-ball bearing
  • 511, 512 roller bearing tapeered roller bearing

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Press Drives And Press Lines (AREA)
  • Transmission Devices (AREA)

Abstract

L'invention concerne une presse à sertir (20) comportant une première mâchoire de pressage (60) et un dispositif d'entraînement de sertissage (26), le dispositif d'entraînement de sertissage (26) comprenant un élément d'entraînement (50) et un arbre d'entraînement (44) pour déplacer l'élément d'entraînement (50), et au moins un arbre rotatif pour déplacer la première mâchoire de pressage (60), et au moins un premier système de roulement (41), sur lequel l'arbre rotatif (42) est monté rotatif. Le premier système de roulement (41) comprend au moins un roulement à billes et au moins un roulement à aiguilles. En outre, l'invention concerne un procédé de fabrication d'une liaison sertie au moyen de la presse à sertir, et l'utilisation d'au moins un premier système de roulement (41) dans le dispositif d'entraînement de sertissage (26) de la presse à sertir (20).
EP22715771.6A 2021-04-08 2022-04-06 Presse à sertir et procédé de fabrication d'une liaison sertie Pending EP4320690A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP21167397.5A EP4071944A1 (fr) 2021-04-08 2021-04-08 Presse à sertir, ainsi que procédé de fabrication d'une connexion sertie
PCT/IB2022/053220 WO2022214998A1 (fr) 2021-04-08 2022-04-06 Presse à sertir et procédé de fabrication d'une liaison sertie

Publications (1)

Publication Number Publication Date
EP4320690A1 true EP4320690A1 (fr) 2024-02-14

Family

ID=75438626

Family Applications (2)

Application Number Title Priority Date Filing Date
EP21167397.5A Pending EP4071944A1 (fr) 2021-04-08 2021-04-08 Presse à sertir, ainsi que procédé de fabrication d'une connexion sertie
EP22715771.6A Pending EP4320690A1 (fr) 2021-04-08 2022-04-06 Presse à sertir et procédé de fabrication d'une liaison sertie

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP21167397.5A Pending EP4071944A1 (fr) 2021-04-08 2021-04-08 Presse à sertir, ainsi que procédé de fabrication d'une connexion sertie

Country Status (5)

Country Link
US (1) US20240190098A1 (fr)
EP (2) EP4071944A1 (fr)
JP (1) JP2024515547A (fr)
CN (1) CN117397132A (fr)
WO (1) WO2022214998A1 (fr)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1980001050A1 (fr) * 1978-11-27 1980-05-29 Loepfe Automation Presse comprenant au moins un outil a mouvement alternatif
JPS5620297U (fr) * 1979-07-25 1981-02-23
DE102007036095A1 (de) * 2007-08-01 2009-02-19 Bernhard Schäfer Werkzeug- und Sondermaschinenbau GmbH Crimppresse mit einer um eine Achse rotierbaren Exzenterwelle zum Antrieb eines Pressenbärs
EP2843779A1 (fr) 2013-09-03 2015-03-04 Exmore Group NV Presse de gaufrage
EP3806250A1 (fr) 2019-10-08 2021-04-14 Schleuniger AG Dispositif de mâchoire de sertissage, presse de sertissage et procédé de fabrication d'une connexion sertie

Also Published As

Publication number Publication date
EP4071944A1 (fr) 2022-10-12
US20240190098A1 (en) 2024-06-13
CN117397132A (zh) 2024-01-12
WO2022214998A1 (fr) 2022-10-13
JP2024515547A (ja) 2024-04-10

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