EP0983840B1 - Presse avec entraínement à came - Google Patents

Presse avec entraínement à came Download PDF

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Publication number
EP0983840B1
EP0983840B1 EP99306877A EP99306877A EP0983840B1 EP 0983840 B1 EP0983840 B1 EP 0983840B1 EP 99306877 A EP99306877 A EP 99306877A EP 99306877 A EP99306877 A EP 99306877A EP 0983840 B1 EP0983840 B1 EP 0983840B1
Authority
EP
European Patent Office
Prior art keywords
cam
recess
cam follower
press according
follower
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.)
Expired - Lifetime
Application number
EP99306877A
Other languages
German (de)
English (en)
Other versions
EP0983840A2 (fr
EP0983840A3 (fr
Inventor
Roger Harry Ketteringham
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.)
McKechnie UK Ltd
Original Assignee
McKechnie UK Ltd
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 McKechnie UK Ltd filed Critical McKechnie UK Ltd
Publication of EP0983840A2 publication Critical patent/EP0983840A2/fr
Publication of EP0983840A3 publication Critical patent/EP0983840A3/fr
Application granted granted Critical
Publication of EP0983840B1 publication Critical patent/EP0983840B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/28—Arrangements for preventing distortion of, or damage to, presses or parts thereof
    • B30B15/285—Arrangements for preventing distortion of, or damage to, presses or parts thereof preventing a full press stroke if there is an obstruction in the working area
    • 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

  • Invention relates to a press and in particular, but not exclusively, a press for installing bush type fasteners into substrates such as aperture sheet material for example for use in fastening components of an article along an assembly line.
  • a press for installing bush type fasteners into substrates such as aperture sheet material for example for use in fastening components of an article along an assembly line.
  • One of said presses is disclosed in WO 81 01871 A.
  • hydraulic presses suffer from various drawbacks including the requirement for a large storage tank for hydraulic fluids such as oil, slow speed of operation due to the build up of pressure before releasing the hydraulic ram, excessive noise, a large stroke or length of travel of the tool which has inherent safety problems, and difficulties in repair and maintenance. Also, hydraulic presses suffer from the drawback that the pressing tool is virtually under its full maximum load throughout its entire stroke which again provides inherent safety problems.
  • a press for installing bush type fasteners into substrates such as aperture sheet material comprising a cam follower operable to drive a pressing device such as a tool towards an operable pressing location, and a driven cam having a cam surface for effecting movement of the cam follower and a recess for receiving the cam follower within the cam.
  • the recess is preferably located between the leading and tailing edge of the cam surface and/or provides no camming action of its own.
  • the gravity location means comprises co-operating components associated with the cam follower and cam respectively, such as slider and slider guide.
  • the length of the recess is in the order of the diameter of the cam follower or greater.
  • the recess is in the order of 2 or more times the diameter of the cam follower.
  • the length of the recess is sufficient to enable alignment of the axis of rotation of the cam follower and the axis of rotation of the driven cam beneficially therefore to provide that if the cam is driven when the cam follower is in this stowed position, it does not effect movement of the cam follower and hence does not effect movement of the tool.
  • the eccentricity of the cam surface is less than 5 millimetres and more preferably in the order of less than 2 millimetres. Beneficially therefore the stroke of the tool under operable load is less than the thickness of a finger.
  • the cam is a rising cam with maximum eccentricity achieved at greater than 180° of rotation and preferably at about 270° of rotation.
  • the recess is relatively narrow and/or the annulus is located on the shaft so as to indicate the top dead centre position of the cam, or other preferred location for the removal of the cam follower from the recess, when the sensor detects the recess between the lobes.
  • the recess is in the order 10° of the circumference wide.
  • the lobe or lobes is/are in the order of 25 degrees of the circumference in width.
  • the means can be a ram such as a pneumatic ram.
  • Another aspect of the invention provides a fastener installing machine comprising one or more of the features of the press discussed above.
  • Another aspect of the invention provides a cam having a recess for receiving a cam follower.
  • a press 10 comprising a driven cam 12 and a cam follower 14.
  • Cam follower 14 is rotatably journalled in a bearing 16 which is attached to slider plate or plunger 18.
  • Slider plate 18 is received in a recess or guide forming part of a slider housing 20 which forms part of the main body of the press 10.
  • Slider plate 18 comprises means for attaching press tool thereto, and referring generally to Figure 1 it can be seen that the press 10 operates to enable sliding motion of tool 22 up and down (in the orientation shown) when cam 12 rotates to effect vertical movement of follower 14 and hence tool 22 thereby to effect pressing action on a fasteners (not shown) at an operable pressing location (also not shown) of the press 10.
  • press 10 comprises driven cam 12 which is attached to a drive shaft 30 which in turn is driven by a motor.
  • Shaft 30 is journalled in a housing 32 which is connected to guide housing 20 thereby forming the main body of press 10 fixedly attached to the shaft 30 is a lobed annulus 34 above which is positioned a sensor 36.
  • lobed annulus 34 comprises a pair of lobes 35 and 37 separated by a recess 38.
  • the circumferential length of lobes 35 and 37 in the order of 25 degrees and the length of recess 38 is in the order of 10 degrees. Accordingly, circumferential length between the leading and trailing edges of lobes 35 and 37 is in the order of 300 degrees.
  • press 10 further comprises position sensors 24 and 26 for detecting a shoulder 48 forming part of bearing 16.
  • the positional sensors 24 and 26 can for example be optical or inductive sensors.
  • the sensors are positioned at substantially the same axial position with respect to the axis of movement of follower 14 along its vertical path.
  • a ram 46 such as a pneumatic ram is provided which is attached at one end to the body and at the other end to bearing 16.
  • Ram 46 effects lifting of bearing 16 and cam follower 14 after a stroke.
  • a chuck or other receiving device 44 connected to slider plate 18, for receiving a tool 22.
  • cam 12 comprises a channelled recess 50 having a width slightly greater than the diameter of cam follower 14 and a length of approximately twice the diameter of cam follower 14 but wherein the curved end of the recess 50 is approximately the radius of cam follower 14 beyond the centre of rotation at bore 52. Further bores 54 are provided for locating the cam onto the end of drive shaft 30, for example using threaded bolts.
  • Cam 12 further comprises a cam surface 56 which extends from the radiused ends of channel 50 through approximately 300 degrees of the circumference of cam 12.
  • the cam surface is provided on the periphery of cam 12.
  • the eccentricity of the cam surface 56 is preferably rising in an anti-clockwise direction.
  • the maximum extent, or most eccentric region, of cam surface 56 is substantially at 90 degrees to axis A (or 270° to the start position).
  • the cam surface 56 can go through a local minimum at the upper edge along axis A shown in Figure 6.
  • Controller 60 can be a mini controller, microprocessor or other programmable device.
  • User controls are provided such as an on button 62, reset button 64, manual button 66, automatic button 68, and actuator button 70.
  • motor 72 for driving cam 12 via shaft 30 on instructions from controller 60.
  • motor 72 is a three phase motor which can be driven using a three phase inverter taking supply from single phase mains electricity for example. The use of such a three phase motor enables controller 60 to control the speed, acceleration and deceleration, direction and stopping point of the motor and hence cam 12.
  • Controller 60 is further operably in communication with sensor 30 for determining the orientation of cam 12 and with position sensors 24 and 26 for determining the location of cam follower 14. Controller 60 further operably activates a valve 74 allowing actuation of pneumatic ram 46 from a pressurised gas supply 76.
  • FIGS 8, 9 and 10 show the relative orientation of cam 12 and follower 14 throughout the operation of the press as now described.
  • cam follower 14 In its rest or stowed position, cam follower 14 is located substantially in axial alignment with drive shaft 30 and is held in position through the action of pneumatic ram 46.
  • the position of cam 12 shown in Figures 2 and 3 is the top dead centre position and is determined by controller 60 using sensor 36 which locates recess 38 between lobes 35 and 37.
  • sensor 36 which locates recess 38 between lobes 35 and 37.
  • actuation button 70 closes valve 74 and pneumatic ram 46 acts as a simple pneumatic damper allowing cam following 14 to move downwardly out of recess 50 in cam 12 under the weight of the cam follower 14, bearing 16, slider plate 18 and tool 22 for example.
  • Controller 60 interrogates sensors 24 and 26 to determine if they detect shoulder 48 of bearing 16 as it falls downwardly. If sensors 24 and 26 detect the shoulder within a predetermined time limit, such as less than 0.1 of a second and the sensors remain closed (or otherwise indicate the presence of shoulder 48 in a lowered position) then controller 62 actuates motor 72 effecting rotation of cam 12 in either a clockwise direction. Accordingly, by setting the length of tool 22 and other components accordingly, it is possible for tool 22 to be proximal the fastener as cam surface 56 engages cam follower 14 when the cam 12 begins to rotate.
  • a predetermined time limit such as less than 0.1 of a second and the sensors remain closed (or otherwise indicate the presence of shoulder 48 in a lowered position
  • cam 12 Movement of cam 12 through 360 degrees effects a vertical movement of cam follower 14 and hence tool 22 through the extent of eccentricity of the cam.
  • power is removed from shaft 30 by de-activating motor 72 and valve 74, having been opened at any stage after engagement of follower 14 with cam surface 56 during the rotation of the cam, effects movement of cam follower 14 back into recess 50 thereby clearing tool 22 away from the operable pressing location of the press.
  • controller 60 reduces the power of motor 72 at the beginning and end of the rotation of cam 12. This can be achieved by causing shaft 30 to rotate at a slower speed when sensor 36 detects either of lobes 36 or 37.
  • the operator When operated in this manual mode, the operator positions the substrate and fastener beneath the tool and then presses the actuation button 70 to recommence the release of follower 14 from recess 50 and so on. If an automatic fastener feeding mechanism is used the automatic mode button 68 can actuated and the operation controlled by controller 60 having means for ensuring the fastener is located beneath the tool before commencing the pressing cycle. Of course this mode can be run without an automatic feeder also.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Press Drives And Press Lines (AREA)
  • Finger-Pressure Massage (AREA)
  • Automatic Assembly (AREA)
  • Mechanical Operated Clutches (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)

Claims (18)

  1. Presse (10) destinée à installer des attaches de type douille dans des supports tels que des matériaux en feuille à trous, comprenant un galet de came (14) fonctionnant pour entraíner un dispositif de compression tel qu'un outil (22) vers un emplacement de compression fonctionnel, et une came entraínée (12) ayant une surface de came (56) destinée à effectuer le mouvement du galet de came (14) et un évidement (50) destiné à recevoir le galet de came (14) à l'intérieur de la came (12), caractérisée en ce que la surface de came (56) se trouve sur la périphérie extérieure de la came (12), en ce que l'évidement (50) est situé sur la surface de came (56) et s'étend radialement vers la pointe de centrage de la came et en ce que lorsque le galet de came (14) est à l'arrêt ou en position rentrée le galet de came est immobile dans l'évidement (50).
  2. Presse selon la revendication 1 dans laquelle l'évidement est situé entre les bords avant et arrière de la surface de came, et de préférence dans laquelle l'évidement ne prévoit pas une action de la came qui lui est propre.
  3. Presse selon la revendication 1 ou 2 dans laquelle la course du galet de came correspond approximativement à l'étendue de l'excentricité de la surface de came.
  4. Presse selon l'une quelconque des revendications 1 à 3 comprenant des moyens pour permettre de placer le dispositif de compression en raison de la gravité dans une position proche de l'un des emplacements de compression fonctionnels et de la position de l'outil dans laquelle le galet de came est sensiblement retiré de l'évidement dans la came, et de préférence dans laquelle la charge sur l'outil est sensiblement égale au poids de l'outil et des composants reliés tels que le galet de came avant l'opération d'installation d'une attache, et/ou dans laquelle les moyens d'emplacement par gravité comprennent des composants en interaction associés au galet de came et à la came respectivement, et/ou dans laquelle les moyens d'emplacement par gravité comprennent une pièce coulissante et une glissière.
  5. Presse selon l'une des revendications précédentes dans laquelle la longueur de l'évidement est de l'ordre du diamètre du galet de came.
  6. Presse selon l'une quelconque des revendications 1 à 4 dans laquelle la longueur de l'évidement est supérieure au diamètre du galet de came, et de préférence dans laquelle la longueur de l'évidement est de l'ordre de deux fois le diamètre du galet de came ou plus.
  7. Presse selon l'une quelconque des revendications précédentes dans laquelle la longueur de l'évidement est suffisante pour permettre une position rentrée dans laquelle l'alignement sensible de l'axe de rotation du galet de came et de l'axe de rotation de la came entraínée est prévu de sorte que lorsque la came est entraínée et que le galet de came est en position rentrée, la came n'effectue pas un mouvement du galet de came suffisant pour effectuer le mouvement de l'outil.
  8. Presse selon l'une quelconque des revendications précédentes dans laquelle l'excentricité de la surface de came est inférieure à 5 millimètres, et de préférence dans laquelle l'excentricité de la surface de came est de l'ordre de moins de 2 millimètres.
  9. Presse selon l'une quelconque des revendications précédentes dans laquelle la came est une came d'arrêt ayant une excentricité maximum obtenue en effectuant une rotation de plus de 180°, et de préférence dans laquelle l'excentricité maximum est obtenue en effectuant une rotation d'environ 270°.
  10. Presse selon l'une quelconque des revendications précédentes comprenant un capteur de position fonctionnellement en communication avec un dispositif de commande fonctionnant pour assurer que le galet de came est sensiblement retiré de l'évidement avant la mise en action de la came entraínée, et de préférence comprenant deux capteurs de position et dans laquelle le dispositif de commande effectue un test logique pour assurer que les deux capteurs détectent le déplacement sensible du galet de came à partir de l'évidement dans une période de temps donnée avant que la mise en action du plateau-came entraíné puisse avoir lieu, et/ou plus préférablement dans laquelle les capteurs sont situés adjacents l'un par rapport à l'autre, et/ou de préférence encore dans laquelle les capteurs sont situés sensiblement dans la même position axiale par rapport à l'axe de course du galet de came.
  11. Presse selon la revendication 10 dans laquelle le temps donné est inférieur à une demi-seconde, et de préférence dans laquelle le temps donné est de l'ordre de 11 millisecondes ou moins, et plus préférablement dans laquelle le temps donné est de l'ordre de 50 millisecondes
  12. Presse selon la revendication 10 ou 11 dans laquelle le dispositif de commande est programmé avec une séquence logique de sorte que la mise en action de la came entraínée se produise uniquement si les premier et deuxième capteurs détectent le mouvement du galet de came sensiblement en dehors de l'évidement dans un temps donné l'un par rapport à l'autre pour effectuer ainsi un aiguillage tel qu'un changement d'un dispositif monostable, et que la puissance fournie à la came entraínée continue uniquement tant que les deux capteurs sont fermés et que l'aiguillage ou le monostable est dans son état activé, et de préférence dans laquelle dès que l'un des capteurs s'ouvre, la puissance fournie à la came entraínée est retirée et l'aiguillage ou le monostable est remis à l'état initial.
  13. Presse selon l'une quelconque des revendications précédentes comprenant des moyens pour permettre l'alignement de l'évidement de la came dans une position souhaitée, telle qu'en position verticale inversée, pour permettre ainsi l'alimentation par gravité du galet de came et de l'outil de compression dans une position inférieure, fonctionnelle, et de préférence dans laquelle les moyens d'alignement comprennent une couronne à lobes fixement attachée à l'arbre d'entraínement de la came, et un capteur destiné à détecter la position du lobe par rapport à la circonférence de la couronne, et/ou de préférence dans laquelle le capteur comprend un capteur inductif et le lobe comprend une protubérance radiale métallique à partir de la couronne.
  14. Presse selon la revendication 13 dans laquelle deux lobes sont prévus sensiblement adjacents l'un par rapport à l'autre et séparés par un évidement, et de préférence dans laquelle l'évidement est relativement étroit, et/ou de préférence dans laquelle l'évidement a une largeur de l'ordre de 10° de circonférence.
  15. Presse selon la revendication 14 dans laquelle la couronne est située sur l'arbre afin d'indiquer la position de point mort haut de la came, ou un autre emplacement préféré pour le retrait du galet de came de l'évidement, lorsque le capteur détecte l'évidement entre les lobes.
  16. Presse selon l'une quelconque des revendications 13, 14 ou 15 dans laquelle le lobe ou les lobes a/ont une largeur de l'ordre de 25 degrés de circonférence.
  17. Presse selon l'une quelconque des revendications précédentes comprenant des moyens prévus pour positionner le galet de came dans l'évidement comme un piston tel qu'un piston pneumatique.
  18. Machine pour installer des attaches comprenant une presse selon l'une quelconque des revendications précédentes.
EP99306877A 1998-09-05 1999-08-27 Presse avec entraínement à came Expired - Lifetime EP0983840B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GBGB9819301.4A GB9819301D0 (en) 1998-09-05 1998-09-05 Improvements in presses
GB9819301 1998-09-05

Publications (3)

Publication Number Publication Date
EP0983840A2 EP0983840A2 (fr) 2000-03-08
EP0983840A3 EP0983840A3 (fr) 2000-04-26
EP0983840B1 true EP0983840B1 (fr) 2004-10-13

Family

ID=10838338

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99306877A Expired - Lifetime EP0983840B1 (fr) 1998-09-05 1999-08-27 Presse avec entraínement à came

Country Status (5)

Country Link
EP (1) EP0983840B1 (fr)
AT (1) ATE279317T1 (fr)
DE (1) DE69921052T2 (fr)
ES (1) ES2234214T3 (fr)
GB (2) GB9819301D0 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1724101A1 (fr) 2005-05-18 2006-11-22 Werner Dinkel Dispositif de protection pour outils de pressage

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000158194A (ja) * 1998-11-25 2000-06-13 Mti:Kk 溝カム機構及び溝カム機構を利用した安全装置を具備するプレス装置
EP2843779A1 (fr) * 2013-09-03 2015-03-04 Exmore Group NV Presse de gaufrage

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB603020A (en) * 1945-11-16 1948-06-08 Morgan Fairest Improvements in or relating to machines for applying handles to cutlery and similar articles
GB626146A (en) * 1947-01-21 1949-07-11 Giuseppe Cristina Device for fitting and removing cotters, keys, wedges, pins and the like, more particularly suitable for cotters of bicycle pedal cranks and chain link pins
DE2915328A1 (de) * 1979-04-14 1980-10-30 Prym Werke William Arbeitsmaschine mit fingerschutzeinrichtung fuer das bewegbare oberwerkzeug
GB2064049B (en) * 1979-11-23 1983-05-11 Horstmann Gear Group Ltd Slow rise quick drop mechanism
EP0042836A1 (fr) * 1979-12-31 1982-01-06 RICHTER, Robert A. Mecanisme de commande du fonctionnement de machines
FR2519581B1 (fr) * 1982-01-13 1986-11-21 Turquin Daniel Presse a demultiplication a came
DD217176A1 (de) * 1983-09-09 1985-01-09 Klaus Herold handbetriebene presse mit kurventrieb
US4750500A (en) * 1986-09-03 1988-06-14 Jerilyn Allen Device for facilitating hair styling using plural tints
US4924693A (en) * 1988-12-16 1990-05-15 Amp Incorporated RAM actuating mechanism in a press for terminating wires
DE19642204C2 (de) * 1996-10-12 1999-07-22 Telegaertner Geraetebau Gmbh Sicherheitseinrichtung an Umformmaschinen

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1724101A1 (fr) 2005-05-18 2006-11-22 Werner Dinkel Dispositif de protection pour outils de pressage

Also Published As

Publication number Publication date
DE69921052T2 (de) 2006-03-02
EP0983840A2 (fr) 2000-03-08
GB2341131A (en) 2000-03-08
ES2234214T3 (es) 2005-06-16
DE69921052D1 (de) 2004-11-18
ATE279317T1 (de) 2004-10-15
EP0983840A3 (fr) 2000-04-26
GB9920232D0 (en) 1999-10-27
GB9819301D0 (en) 1998-10-28

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