EP0637483B1 - Tool for machining pieces - Google Patents

Tool for machining pieces Download PDF

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Publication number
EP0637483B1
EP0637483B1 EP94111435A EP94111435A EP0637483B1 EP 0637483 B1 EP0637483 B1 EP 0637483B1 EP 94111435 A EP94111435 A EP 94111435A EP 94111435 A EP94111435 A EP 94111435A EP 0637483 B1 EP0637483 B1 EP 0637483B1
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EP
European Patent Office
Prior art keywords
tool according
feed
gearing
curved track
fine
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Expired - Lifetime
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EP94111435A
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German (de)
French (fr)
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EP0637483A1 (en
Inventor
Helmut Dipl.-Ing. Dischler
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Individual
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Individual
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    • 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
    • H01R43/042—Hand tools for crimping
    • H01R43/0427—Hand tools for crimping fluid actuated hand crimping tools

Definitions

  • the invention relates to a tool for machining, in particular pressing workpieces, with a movable machining die and a feed device for its feed movement.
  • Such tools are widely used for pressing sleeves, cable lugs or the like onto a workpiece, but also for cutting, punching or the like.
  • Mainly hydraulically driven tools were used.
  • DE-OS 32 35 0 ⁇ 40 ⁇ discloses a tool in which the processing stamp is moved with the aid of a plunger in which a control element is arranged coaxially. The control member is supported against a gear which is moved when the plunger moves in the working direction of the control member with a fraction of the speed of the plunger.
  • the control element is connected to the plunger in such a way that it moves at the same speed as the plunger.
  • a locking device is arranged on the control member, which blocks the pressure medium flow to the working chamber of the cylinder when the plunger is in a predetermined position. This ensures that thinner workpieces are weaker, d. H. with a lower degree of deformation, are pressed than thicker ones.
  • Another hydraulically operated tool is in the EP-A-0 ⁇ 232768.
  • a low-pressure cylinder and a high-pressure cylinder which can be connected to the pressure medium supply to the tool are provided. These are connected to one another in such a way that in the low-pressure range, with a relatively small number of movements of hand levers that drive the movable piston, a large amount of pressure medium can be conveyed into the working cylinder of the tool in order to produce a rapid feed.
  • the high-pressure pump is used without switching operations being necessary.
  • the high-pressure safety valve can be opened by pressing a release button.
  • the known hydraulic tools all have a relatively complicated structure, the parts coming into contact with the hydraulic oil in particular having to be carried out very precisely.
  • the invention is therefore based on the object of designing a tool of the type mentioned in such a way that it can be manufactured more cost-effectively.
  • the feed device has a coarse feed device for the rapid feed of the processing die to rest on the workpiece and a mechanical fine feed gear for the further feed of the processing die for processing the workpiece, the fine feed gear having defined start and end positions and so with the coarse feed device is coupled so that the fine feed gear is adjusted in the direction of its end position when the coarse feed device is actuated.
  • the fine feed gear is arranged between the rough feed device and the processing stamp, so that the distance between the two can be changed by means of the fine feed gear.
  • This arrangement allows the coarse feed device to be actuated from the end opposite the processing stamp. This does not preclude a reverse arrangement.
  • the invention further provides that the fine feed gear has a release device which becomes effective in the area of the end position and permits a return movement of the processing stamp.
  • This release device can be designed differently depending on the type of fine feed gear and should relieve the fine feed gear and coarse feed device in such a way that the springbacks of the workpiece and widening of the tool that regularly occur during forming processing are taken into account and the workpiece can then be removed from the tool.
  • the Coarse feed device and the processing stamp are coupled parallel to the fine feed gear via a flexible connecting element, the connecting element holding the rough feed device and processing stamp during rapid feed at such a distance that the fine feed gear is disengaged, and wherein the connecting element has such flexibility that the fine feed gear at or after Of the processing stamp on the workpiece engages.
  • the intervention can be frictional or positive.
  • the fine feed gear has a drive and that a switch or a clutch is provided which is controlled when the fine feed gear engages.
  • the fine feed gear can be designed in different ways.
  • a cam track gear can be considered, the cam track not necessarily having to work frictionally, but also having a gear meshing.
  • the cam track gear expediently has a rotatably mounted cam track element with a cam track which has such an incline that when the cam track element is rotated, a fine feed of the processing stamp is effected.
  • the cam track element can be designed as a cam with a cam track on the end face. It should have an indentation at the end of its slope in order to allow the processing stamp to move back in the sense of the release device mentioned above.
  • a stop for the cam track element is provided, which is arranged such that the cam track element moves against the stop during rapid feed and is thereby set in a rotational movement in the direction of its end position.
  • the cam track element should be rotatable from the start to the end position against the action of a spring in order to enable a defined backward rotation.
  • the cam track element can have a drive roller track on which a drive roller bears at least in the engagement position of the fine feed gear.
  • the drive roller conveyor can simultaneously form the cam track.
  • the cam track element is mounted on the processing stamp and the drive roller on the coarse feed device. As an alternative to this, there is the possibility that the drive roller and cam track element are connected to the coarse feed device and the cam track element has a separate cam track for contact with the processing stamp.
  • the fine feed gear has a lever gear connecting a rough feed device and a machining stamp, for example in the form of a crank drive with two articulated arms, the angular position of which can be changed relative to one another.
  • one of the articulated arms has an articulated arm extension which rests against a stop in such a way that the angular position of the articulated arms changes in the direction of their end position during rapid feed.
  • This design also has the consequence that, according to the basic idea of the invention, the residual thrust to be carried out by the fine feed gear is the smaller, the greater the rapid feed with the help of the rough feed device.
  • the articulated connection between the articulated arms has such a guide that the angular position of the articulated arms changes in the direction of their end position during rapid feed.
  • the stop or the guide should be movable via a drive device in the sense of an angle change.
  • the drive device should have a rotatable cam having an incline, the cam having an indentation at the end of its incline. Finally, it should be provided that the angular position of the articulated arms can be changed beyond their extended position in order to achieve a so-called over-center position, with the result that the above-mentioned relief occurs.
  • the tool (1) shown in FIG. 1 has a basic body (2) shown in section and an adjoining tool holder (3) which carries an upper tool (4).
  • a cantilever (5) is a complementary processing punch (6) serving as a lower tool, which is translational, ie. H. guided vertically movable in the selected representation.
  • a rough feed device (7) is arranged in the base body (2) and essentially consists of a vertically guided slide (8) and a spindle (9) with a relatively strong thread pitch.
  • a spindle (9) instead of the spindle (9), other elements such as wedges, cams, etc. are also conceivable.
  • the spindle (9) moves in the direction of its longitudinal axis when it is rotated. Its top tip engages in a suitable recess (10 ⁇ ), where it is supported on the slide (8) via a compression spring (11).
  • a roller (12) is rotatably mounted about a horizontal axis. It is connected to an electric drive, not shown here - mechanical drives are also possible - and protrudes beyond the upper end of the slide (8).
  • the carriage (8) is connected to the processing stamp (6) via a leaf spring (14) which strives to keep both parts at a certain distance.
  • the roller (12) is assigned a fine feed gear (15), to which a cam plate (16) belongs, which is freely rotatably mounted on the processing stamp (6) via a horizontal axis (17) is. On its end face it has a curved path (18), the distance to the axis (17) of which increases continuously upwards. At the end of the curved path (18) there is a flat arch (19). There is a tension spring (20 ⁇ ) articulated, which is connected to the boom (5) and strives to turn the cam (16) clockwise. A stop (21) on the processing stamp (6) limits the movement of the cam disc (16) clockwise.
  • the rough feed device (7), fine feed gear (15) and machining punch (6) are in the initial position with the greatest distance between the upper tool (4) and the machining punch (6).
  • a workpiece (22) - here a cable with a cable lug to be pressed on - can then be inserted into the space between the processing stamp (6) and the upper tool (4).
  • the spindle (9) is then rotated in such a direction that the slide (8) and thus also the machining stamp (6) are moved in the direction of the workpiece (22) at a comparatively high speed.
  • the cam disc (16) comes to rest on a projection (23) after a short distance. With further feed, this projection (23) ensures that the cam disc (16) is pivoted counterclockwise, and the more, the closer the machining stamp (6) approaches the workpiece (22).
  • the spindle (9) can be rotated by such an amount until a shoulder (9a) comes to rest on the slide (8) and there contacts a contact that drives the drive the role (12) switches on.
  • the roller (12) is then rotated clockwise, whereby the cam disc (16) due to the slope of the cam track (18) ensures that the processing punch (6) presses up and the workpiece (22) is deformed. This is only possible with the rest of the curve track (18), the extent of which is smaller the smaller the cross section of the workpiece (22).
  • the spindle (9) is designed so that it acts self-locking, so that the roller (12) can be supported against the spindle (9).
  • the roller (12) moves into the arch (19), whereby the processing stamp (6) is relieved, ie it only bears against the workpiece (23) under the action of the leaf spring (14).
  • the coarse feed device (7) can then be retracted and the workpiece (22) removed.
  • the cam (16) is then turned back to the starting position by the spring (20 ⁇ ). After the spindle (9) has been moved back further, a workpiece can be inserted again.
  • the tool (1) shown in Figure (1) can also be modified in such a way that the roller (12) and the cam disc (16) are interchanged, i.e. the cam disk (16) is mounted on the slide (8) and the roller (12) on the processing stamp (6), the cam disk (16) then being driven.
  • Figures (2) and (3) show a modification of the tool (1) according to Figure (1), the illustration being limited to the design of the fine feed gear (24).
  • the fine feed gear (24) consists of a roller (25) and a circular segment disc (26).
  • the roller (25) is the counterpart to the roller (12) in the tool (1) according to FIG. (1), while the circular segment disc (26) corresponds in its function to the cam disc (16).
  • the circular segment disc (26) has a circular path (27) on the end face with which it rests on the roller (25). It is rotatably and vertically displaceably mounted in a link (29) of the tool (not shown here) via a pin (28). In the area of the pin (28) Circular segment disc (26) has a curved path (30 ⁇ ), on which a processing stamp (31) bears. In addition, the circular segment disc (26) is biased clockwise by a tension spring (32). The circular path (27) has an arch (34) in the area of the tension spring (32).
  • the circular segment disc (26) and thus also the processing stamp (31) are pressed upwards until they come to rest on the workpiece.
  • a stop corresponding to the stop (21) can also be provided here so that the circular segment disc (26) is rotated counterclockwise even during the rapid feed.
  • Figure (3) shows a modification of Figure (2), reference being made to the description according to Figure (2) with regard to the parts of the same design.
  • a circular eccentric path (33) is provided in this case, on which the processing stamp (31) bears.
  • the tool (41) shown in Figures (4) and (5) has a base body (42) which ends in a tool holder (43) which carries an upper tool (44).
  • a processing stamp (45) is mounted displaceably in the base body (42), specifically in the direction of the upper tool (44). It can be used to deform a workpiece (46) when it is moved against the upper tool (44).
  • a coarse feed device (47) is arranged in the lower part of the base body (42) and has a self-locking spindle (49) mounted in a thread (48). This fits into a carriage (50 ⁇ ), which is guided translationally and coaxially to the processing stamp (45).
  • Processing stamp (45) and slide (50 ⁇ ) are connected via a fine feed gear (51), which consists of a crank rod (52) articulated on the processing stamp (45) and a toggle lever (53).
  • the toggle lever (53) has a toggle lever arm (54) which is articulated to the crank rod (52).
  • the toggle lever (52) is mounted on the carriage (50 ⁇ ) via a horizontal axis (55) and has an elongated toggle extension (56). Its free end is pressed by a tension spring (57) against the lower end of a piston rod (58) which is connected to a piston (59), which in turn is vertically movably guided in a hydraulic cylinder (60 ⁇ ).
  • the hydraulic cylinder (60 ⁇ ) is firmly connected to the tool holder (43).
  • the hydraulic cylinder (60 ⁇ ) has a hydraulic input (61) which can be connected to a hydraulic oil supply, for example in the form of a hand pump. There is also a hydraulic outlet (62) which enables the hydraulic oil to return. At the beginning of the hydraulic outlet (62), a vertically movable valve plate (63) is provided, which is acted upon by a compression spring (64). In the position shown, an extension (65) of the piston rod (58) acts on the valve plate (63).
  • the piston rod (58) During rapid feed using the spindle (49), the piston rod (58) remains in the position shown and forms a stop for the toggle extension (56).
  • the valve plate (63) blocks the hydraulic outlet (62).
  • the processing stamp (45) is moved in the direction of the workpiece (46), the toggle lever (53) being pivoted in a clockwise direction due to the abutment on the piston rod (58), as shown in dashed lines. This shortens the remaining stroke of the fine feed gear (51) to its end position, the greater the distance caused by the rapid feed and thus the smaller the cross section of the workpiece (46).
  • the processing stamp (45) reaches the workpiece (46). Since the coarse feed device (47) cannot exert a large force, the rapid feed is then interrupted.
  • FIG (6) shows a further variant of a tool (71) according to the invention in a very schematic representation.
  • the tool (71) has a base body (72), of which only an underside thread (73) and a sliding guide (74) are drawn on the top.
  • a processing stamp (75) is guided so that it can move vertically.
  • an upper tool (76) which is attached to a tool holder (77), which in turn is connected to the base body (72) in a device-fixed manner.
  • a spindle (78) In the thread (73) a spindle (78) is guided, which engages in a carriage (79).
  • the carriage (79) - which is not shown here in more detail - is axially displaceably mounted in the base body (72) in the same way as the carriage (8) in the exemplary embodiment according to FIG. (1).
  • Spindle (78) and slide (79) form a coarse feed device (80 ⁇ ).
  • the processing punch (75) and the slide (79) are connected to two crank rods (82, 83) via a fine feed gear (81), the crank rods (82, 83) being coupled to one another via a joint (84).
  • the joint (84) is supported on a slide (85), which is displaceably guided in the base body (72) transversely to the direction of movement of the processing die (75) or the spindle (78).
  • the slide (85) has an inclined contact surface (86) on the joint side, the inclined position being such that it encloses an acute angle with the axis of the spindle (78) upwards.
  • the slide (85) bears on the rear of a cam disk (87) which is rotatably mounted in a horizontally extending slot (88).
  • a drive pulley (89) is firmly connected to the cam disk (87) and is provided with ratchet teeth (90 ⁇ ) on the end face over part of the circumference.
  • the cam disc (87) and drive disc (89) are supported in the slot (88) via a pivot pin (91) which is spring-loaded via a leaf spring (92) such that the cam disc (87) is pressed against the slide (85) becomes.
  • the elongated hole (88), like the clamping (93) of the leaf spring (92), belongs to the base body (72), without this being shown in more detail here.
  • the drive pulley (89) interacts with a ratchet lever (94), which is brought into contact with a device-fixed stop (96) via a compression spring (95).
  • the ratchet lever (94) is connected in an articulated manner to a hand lever (97) which is connected to the base body (72) via a device-fixed joint (98).
  • a backstop (99) which is pressed against a fixed stop (10 ⁇ 1) by means of a compression spring (10 ⁇ 0 ⁇ ) and thus held in a defined position.
  • the backstop (99) is connected to the base body (72) via a joint (10 ⁇ 2).
  • the tool (71) is operated as follows. First, all parts are in the position shown.
  • the coarse feed device (80 ⁇ ) is then turned by turning the spindle (78) actuated, whereby the machining punch (75) is quickly moved against the workpiece (10 ⁇ 3) resting on the upper tool (76).
  • the joint (84) is supported on the contact surface (86) of the slide (85) and runs up the slope. This has the consequence that the angle between the two crank rods (82, 83) is increased, and the more, the greater the distance traveled with the rough feed device (80 ⁇ ) and thus the smaller the cross section of the workpiece (10 ⁇ 3).
  • the slide (85) remains in the position shown, that is, with the rapid feed, the lateral pressure on the slide (85) is less than the leaf spring (92) acting in the opposite direction on the pivot (91).
  • the drive pulley (89) can be moved clockwise piece by piece by pivoting it in accordance with the double arrow drawn in, clockwise movement of the drive pulley (89) being prevented by the backstop (99).
  • the cam track (10 ⁇ 4) with which it rests on the back of the slide (85) is shaped so that when it is turned clockwise, the slide (85) is moved in the direction of the joint (84).
  • the spindle (78) remains open Because of their self-locking storage in the thread (73) their position.
  • the slide (85) can be moved beyond the top dead center, ie the extended position. Then there is a spontaneous relief, so that the processing stamp (75) can be moved back by means of the rough feed device (80 (). Due to the relief, the leaf spring (92) will move the pivot pin (91) back into the position shown, so that the drive disc (89) comes out of engagement with the ratchet lever (94) and the backstop (99).
  • the cam disc (87), the slide (85) and the crank rods (82, 83) can be moved back until the starting position shown is reached again.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Press Drives And Press Lines (AREA)
  • Turning (AREA)
  • Auxiliary Devices For Machine Tools (AREA)
  • Punching Or Piercing (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Hand Tools For Fitting Together And Separating, Or Other Hand Tools (AREA)
  • Shearing Machines (AREA)
  • Feeding Of Workpieces (AREA)
  • Polishing Bodies And Polishing Tools (AREA)

Abstract

A tool for shaping workpieces (22, 46, 103) has a movable punch (6, 31, 45, 75) and a feed device for its feed motion. According to the invention, the feed device has a coarse-feed device (7, 47, 80) for the rapid feed of the punch (6, 31, 45, 75) until it comes in contact with the workpiece (22, 46, 103) as well as a fine-feed mechanism (15, 24, 51, 81) for the further feed of the punch (6, 31, 45, 75) for the purpose of shaping the workpiece (22, 46, 103), the fine-feed mechanism (15, 24, 51, 81) having defined initial and end positions and being coupled to the coarse-feed device (7, 47, 80) in such a way that the fine-feed mechanism (15, 24, 51, 81) is displaced in the direction of its end position when the coarse-feed device (7, 47, 80) is actuated. <IMAGE>

Description

Die Erfindung betrifft ein Werkzeug zur Bearbeitung, insbesondere Verpressen von Werkstücken, mit einem beweglichen Bearbeitungsstempel und einer Vorschubeinrichtung für dessen Vorschubbewegung.The invention relates to a tool for machining, in particular pressing workpieces, with a movable machining die and a feed device for its feed movement.

Solche Werkzeuge werden vielfach für das Aufpressen von Hülsen, Kabelschuhen oder dergleichen auf ein Werkstück, aber auch zum Schneiden, Stanzen oder dergleichen verwendet. Dabei wurden vornehmlich hydraulisch angetriebene Werkzeuge verwendet. So ist beispielsweise in der DE-OS 32 35 0̸40̸ ein Werkzeug offenbart, bei dem der Bearbeitungsstempel mit Hilfe eines Preßkolbens bewegt wird, in dem ein Steuerorgan koaxial verschieblich angeordnet ist. Dabei stützt sich das Steuerorgan gegen ein Getriebe ab, das bei Bewegung des Preßkolbens in Arbeitsrichtung des Steuerorgans mit einem Bruchteil der Geschwindigkeit des Preßkolbens bewegt wird. Bei Berührung des Bearbeitungsstempels mit dem zu verpressenden Werkstück wird das Steuerorgan mit dem Preßkolben derart verbunden, daß es sich mit der gleichen Geschwindigkeit bewegt wie der Preßkolben. Dabei ist am Steuerorgan eine Sperrvorrichtung angeordnet, die bei einer vorbestimmten Stellung des Preßkolbens den Druckmittelzufluß zum Arbeitsraum des Zylinders sperrt. Hierdurch wird erreicht, daß dünnere Werkstücke schwächer, d. h. mit einem geringeren Verformungsgrad, verpreßt werden als dickere.Such tools are widely used for pressing sleeves, cable lugs or the like onto a workpiece, but also for cutting, punching or the like. Mainly hydraulically driven tools were used. For example, DE-OS 32 35 0̸40̸ discloses a tool in which the processing stamp is moved with the aid of a plunger in which a control element is arranged coaxially. The control member is supported against a gear which is moved when the plunger moves in the working direction of the control member with a fraction of the speed of the plunger. When the processing die comes into contact with the workpiece to be pressed, the control element is connected to the plunger in such a way that it moves at the same speed as the plunger. In this case, a locking device is arranged on the control member, which blocks the pressure medium flow to the working chamber of the cylinder when the plunger is in a predetermined position. This ensures that thinner workpieces are weaker, d. H. with a lower degree of deformation, are pressed than thicker ones.

Ein weiteres, hydraulisch betriebenes Werkzeug ist in der EP-A-0̸ 232 768 beschrieben. Bei diesem Werkzeug sind ein Niederdruckzylinder und ein mit der Druckmittelzufuhr zum Werkzeug verbindbarer Hochdruckzylinder vorgesehen. Diese sind so miteinander geschaltet, daß man im Niederdruckbereich mit verhältnismäßig wenigen Bewegungen von Handhebeln, die den beweglichen Kolben antreiben, eine große Druckmittelmenge in den Arbeitszylinder des Werkzeuges fördern kann, um einen Schnellvorschub zu erzeugen. Trifft der Bearbeitungsstempel auf das zu bearbeitende Werkstück, kommt die Hochdruckpumpe zum Einsatz, ohne daß hierfür Umschaltvorgänge notwendig sind. Ist die gewünschte Verformung des Werkstückes erreicht, kann durch Betätigung eines Auslöseknopfes das Hochdrucksicherheitsventil geöffnet werden. Bei diesem Werkzeug läßt sich auch eine Kombination des Gedankens aus der DE-OS 32 35 0̸40̸ verwirklichen.Another hydraulically operated tool is in the EP-A-0̸232768. In this tool, a low-pressure cylinder and a high-pressure cylinder which can be connected to the pressure medium supply to the tool are provided. These are connected to one another in such a way that in the low-pressure range, with a relatively small number of movements of hand levers that drive the movable piston, a large amount of pressure medium can be conveyed into the working cylinder of the tool in order to produce a rapid feed. If the processing stamp hits the workpiece to be machined, the high-pressure pump is used without switching operations being necessary. Once the desired deformation of the workpiece has been reached, the high-pressure safety valve can be opened by pressing a release button. With this tool, a combination of the ideas from DE-OS 32 35 0̸40̸ can be realized.

Die bekannten Hydraulikwerkzeuge haben sämtlich einen relativ komplizierten Aufbau, wobei insbesondere die mit dem Hydrauliköl in Verbindung kommenden Teile sehr genau ausgeführt werden müssen. Der Erfindung liegt deshalb die Aufgabe zugrunde, ein Werkzeug der eingangs gennanten Art so zu gestalten, daß es kostengünstiger herstellbar ist.The known hydraulic tools all have a relatively complicated structure, the parts coming into contact with the hydraulic oil in particular having to be carried out very precisely. The invention is therefore based on the object of designing a tool of the type mentioned in such a way that it can be manufactured more cost-effectively.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß die Vorschubeinrichtung eine Grobvorschubeinrichtung für den Schnellvorschub des Bearbeitungsstempels bis zur Anlage am Werkstück sowie ein mechanisches Feinvorschubgetriebe für den weiteren Vorschub des Bearbeitungsstempels zur Bearbeitung des Werkstückes aufweist, wobei das Feinvorschubgetriebe definierte Anfangs- und Endstellungen hat und derart mit der Grobvorschubeinrichtung gekoppelt ist, daß das Feinvorschubgetriebe bei Betätigung der Grobvorschubeinrichtung in Richtung ihrer Endstellung verstellt wird.This object is achieved in that the feed device has a coarse feed device for the rapid feed of the processing die to rest on the workpiece and a mechanical fine feed gear for the further feed of the processing die for processing the workpiece, the fine feed gear having defined start and end positions and so with the coarse feed device is coupled so that the fine feed gear is adjusted in the direction of its end position when the coarse feed device is actuated.

Auf Grund der Tatsache, daß ein mechanisches Feinvorschubgetriebe vorgesehen ist, lassen sich die Herstellungskosten erheblich mindern, selbst wenn für die Grobvorschubeinrichtung eine Hydraulikpumpe verwendet wird. Dabei läßt sich auch mit einem Feinvorschubgetriebe eine Kopplung der Bewegung von Grobvorschubeinrichtung und Feinvorschubgetriebe dergestalt erreichen, daß das Feinvorschubgetriebe bei Betätigung der Grobvorschubeinrichtung in einem bestimmten Übersetzungsverhältnis in Richtung ihrer Endstellung verstellt wird. Dies hat zur Folge, daß der Abstand zur Endstellung um so geringer wird, je weiter der Schnellvorschub mittels der Grobvorschubeinrichtung geht. Dies wiederum bewirkt, daß der Verformungsgrad des Werkstückes um so kleiner ist, je geringer sein Querschnitt ist. Letzteres ist insbesondere bei der Befestigung von Kabelschuhen an Kabeln erwünscht.Due to the fact that a mechanical Fine feed gear is provided, the manufacturing costs can be significantly reduced, even if a hydraulic pump is used for the rough feed device. A coupling of the movement of the rough feed device and the fine feed gear can also be achieved with a fine feed gear in such a way that the fine feed gear is adjusted in a certain transmission ratio in the direction of its end position when the rough feed device is actuated. This has the consequence that the further the rapid feed by means of the coarse feed device, the smaller the distance to the end position. This in turn has the effect that the smaller the cross section, the smaller the degree of deformation of the workpiece. The latter is particularly desirable when attaching cable lugs to cables.

In Ausbildung der Erfindung ist vorgesehen, daß das Feinvorschubgetriebe zwischen Grobvorschubeinrichtung und Bearbeitungsstempel angeordnet ist, so daß der Abstand zwischen beiden mittels des Feinvorschubgetriebes veränderbar ist. Diese Anordnung läßt zu, daß die Grobvorschubeinrichtung von der dem Bearbeitungsstempel entgegengesetzten Ende betätigbar ist. Dies schließt eine umgekehrte Anordnung nicht aus.In an embodiment of the invention it is provided that the fine feed gear is arranged between the rough feed device and the processing stamp, so that the distance between the two can be changed by means of the fine feed gear. This arrangement allows the coarse feed device to be actuated from the end opposite the processing stamp. This does not preclude a reverse arrangement.

Die Erfindung sieht ferner vor, daß das Feinvorschubgetriebe eine im Bereich der Endstellung wirksam werdende, eine Rückbewegung des Bearbeitungsstempels erlaubende Freigabeeinrichtung aufweist. Diese Freigabeeinrichtung kann je nach Art des Feinvorschubgetriebes verschiedenartig ausgebildet sein und soll eine Entlastung von Feinvorschubgetriebe und Grobvorschubeinrichtung dergestalt bewirken, daß die bei der umformenden Bearbeitung regelmäßig auftretenden Rückfederungen des Werkstückes und Aufweitung des Werkzeuges berücksichtigt und das Werkstück dann aus dem Werkzeug entnommen werden kann.The invention further provides that the fine feed gear has a release device which becomes effective in the area of the end position and permits a return movement of the processing stamp. This release device can be designed differently depending on the type of fine feed gear and should relieve the fine feed gear and coarse feed device in such a way that the springbacks of the workpiece and widening of the tool that regularly occur during forming processing are taken into account and the workpiece can then be removed from the tool.

Nach der Erfindung ist ferner vorgesehen, daß die Grobvorschubeinrichtung und der Bearbeitungsstempel parallel zum Feinvorschubgetriebe über ein nachgiebiges Verbindungselement gekoppelt sind, wobei das Verbindungselement Grobvorschubeinrichtung und Bearbeitungsstempel beim Schnellvorschub auf einen solchen Abstand hält, daß das Feinvorschubgetriebe außer Eingriff ist, und wobei das Verbindungselement eine solche Nachgiebigkeit hat, daß das Feinvorschubgetriebe bei oder nach Anlage des Bearbeitungsstempels am Werkstück in Eingriff kommt. Dabei kann der Eingriff reib- oder formschlüssig sein.According to the invention it is further provided that the Coarse feed device and the processing stamp are coupled parallel to the fine feed gear via a flexible connecting element, the connecting element holding the rough feed device and processing stamp during rapid feed at such a distance that the fine feed gear is disengaged, and wherein the connecting element has such flexibility that the fine feed gear at or after Of the processing stamp on the workpiece engages. The intervention can be frictional or positive.

Es kann des weiteren vorgesehen sein, daß das Feinvorschubgetriebe einen Antrieb aufweist und daß ein Schalter oder eine Kupplung vorgesehen ist, der bzw. die bei Eingriff des Feinvorschubgetriebes angesteuert wird.It can further be provided that the fine feed gear has a drive and that a switch or a clutch is provided which is controlled when the fine feed gear engages.

Das Feinvorschubgetriebe kann auf verschiedene Weise ausgebildet sein. So kann beispielsweise ein Kurvenbahngetriebe in Frage kommen, wobei die Kurvenbahn nicht unbedingt reibschlüssig arbeiten muß, sondern auch ein Zahnradeingriff aufweisen kann. Das Kurvenbahngetriebe hat zweckmäßigerweise ein drehbar gelagertes Kurvenbahnelement mit einer Kurvenbahn, die eine solche Steigung hat, daß bei Verdrehung des Kurvenbahnelements ein Feinvorschub des Bearbeitungsstempels bewirkt wird. In Sonderheit kann das Kurvenbahnelement als Kurvenscheibe mit stirnseitiger Kurvenbahn ausgebildet sein. Dabei sollte sie am Ende ihrer Steigung eine Einbuchtung aufweisen, um eine Rückbewegung des Bearbeitungsstempels im Sinne der oben erwähnten Freigabeeinrichtung zu erlauben.The fine feed gear can be designed in different ways. For example, a cam track gear can be considered, the cam track not necessarily having to work frictionally, but also having a gear meshing. The cam track gear expediently has a rotatably mounted cam track element with a cam track which has such an incline that when the cam track element is rotated, a fine feed of the processing stamp is effected. In particular, the cam track element can be designed as a cam with a cam track on the end face. It should have an indentation at the end of its slope in order to allow the processing stamp to move back in the sense of the release device mentioned above.

Nach einem weiteren Merkmal der Erfindung ist vorgeschlagen, daß ein Anschlag für das Kurvenbahnelement vorgesehen ist, der derart angeordnet ist, daß das Kurvenbahnelement beim Schnellvorschub gegen den Anschlag fährt und hierdurch in Drehbewegung in Richtung auf seine Endstellung versetzt wird. Dies stellt eine besonders einfache Lösung für die Kopplung von Grobvorschubeinrichtung und Feinvorschubgetriebe in dem Sinne dar, daß das Feinvorschubgetriebe bei Betätigung der Grobvorschubeinrichtung in Richtung seiner Endstellung verstellt wird, mit der Folge, daß die Verformung des Werkstückes um so geringer ist, je größer der Weg des Schnellvorschubs bis zur Anlage am Werkstück ist.According to a further feature of the invention, it is proposed that a stop for the cam track element is provided, which is arranged such that the cam track element moves against the stop during rapid feed and is thereby set in a rotational movement in the direction of its end position. This represents a particularly simple solution for the coupling of Coarse feed device and fine feed gear in the sense that the fine feed gear is adjusted in the direction of its end position when the rough feed device is actuated, with the result that the deformation of the workpiece is less, the greater the path of the rapid feed to the system on the workpiece.

Das Kurvenbahnelement sollte aus der Anfangs- in die Endstellung gegen die Wirkung einer Feder verdrehbar sein, um eine definierte Rückdrehung zu ermöglichen. Das Kurvenbahnelement kann eine Antriebsrollenbahn aufweisen, an der eine Antriebsrolle zumindest in Eingriffsstellung des Feinvorschubgetriebes anliegt. Die Antriebsrollenbahn kann dabei gleichzeitig die Kurvenbahn bilden. Weiterhin kann vorgesehen sein, daß das Kurvenbahnelement an dem Bearbeitungsstempel und die Antriebsrolle an der Grobvorschubeinrichtung gelagert sind. Alternativ dazu besteht die Möglichkeit, daß Antriebsrolle und Kurvenbahnelement mit der Grobvorschubeinrichtung verbunden sind und das Kurvenbahnelement eine gesonderte Kurvenbahn für die Anlage am Bearbeitungsstempel aufweist.The cam track element should be rotatable from the start to the end position against the action of a spring in order to enable a defined backward rotation. The cam track element can have a drive roller track on which a drive roller bears at least in the engagement position of the fine feed gear. The drive roller conveyor can simultaneously form the cam track. Furthermore, it can be provided that the cam track element is mounted on the processing stamp and the drive roller on the coarse feed device. As an alternative to this, there is the possibility that the drive roller and cam track element are connected to the coarse feed device and the cam track element has a separate cam track for contact with the processing stamp.

Nach einem weiteren Merkmal der Erfindung ist vorgesehen, daß das Feinvorschubgetriebe ein Grobvorschubeinrichtung und Bearbeitungsstempel verbindendes Hebelgetriebe aufweist, beispielsweise in Form eines Kurbeltriebs mit zwei Gelenkarmen, deren Winkelstellung zueinander veränderbar ist. In einer zweckmäßigen Ausführungsform hat einer der Gelenkarme einen Gelenkarmfortsatz, der derart an einem Anschlag anliegt, daß sich die Winkelstellung der Gelenkarme beim Schnellvorschub in Richtung auf ihre Endstellung verändert. Auch diese Ausbildung hat zur Folge, daß entsprechend dem Grundgedanken der Erfindung der von dem Feinvorschubgetriebe auszufuhrende Restschub um so geringer ist, je größer der Schnellvorschub mit Hilfe der Grobvorschubeinrichtung war.According to a further feature of the invention, it is provided that the fine feed gear has a lever gear connecting a rough feed device and a machining stamp, for example in the form of a crank drive with two articulated arms, the angular position of which can be changed relative to one another. In an expedient embodiment, one of the articulated arms has an articulated arm extension which rests against a stop in such a way that the angular position of the articulated arms changes in the direction of their end position during rapid feed. This design also has the consequence that, according to the basic idea of the invention, the residual thrust to be carried out by the fine feed gear is the smaller, the greater the rapid feed with the help of the rough feed device.

Alternativ dazu kann vorgesehen werden, daß die Gelenkverbindung zwischen den Gelenkarmen eine derartige Führung aufweist, daß sich die Winkelstellung der Gelenkarme beim Schnellvorschub in Richtung auf ihre Endstellung verändert. In beiden Fällen sollte der Anschlag bzw. die Führung über eine Antriebseinrichtung im Sinne einer Winkelveränderung bewegbar sein.Alternatively, it can be provided that the articulated connection between the articulated arms has such a guide that the angular position of the articulated arms changes in the direction of their end position during rapid feed. In both cases, the stop or the guide should be movable via a drive device in the sense of an angle change.

Die Antriebseinrichtung sollte eine drehbare, eine Steigung aufweisende Kurvenscheibe aufweisen, wobei die Kurvenscheibe am Ende ihrer Steigung eine Einbuchtung hat. Schließlich sollte vorgesehen sein, daß die Winkelstellung der Gelenkarme über ihre gestreckte Stellung hinaus veränderbar ist, um eine sogenannte Übertotpunkt-Stellung zu erreichen, mit der Folge, daß die schon oben erwähnte Entlastung eintritt.The drive device should have a rotatable cam having an incline, the cam having an indentation at the end of its incline. Finally, it should be provided that the angular position of the articulated arms can be changed beyond their extended position in order to achieve a so-called over-center position, with the result that the above-mentioned relief occurs.

In der Zeichnung ist die Erfindung an Hand von mehreren Ausführungsbeispielen näher veranschaulicht. Es zeigen:

Figur (1)
die Seitenansicht mit Teilschnittdarstellung eines erfindungsgemäßen Werkzeuges;
Figur (2)
die Seitenansicht eines Feinvorschubgetriebes für ein Werkzeug gemäß Figur (1) und
Figur (3)
die Seitenansicht eines weiteren Feinvorschubgetriebes für das Werkzeug gemäß Figur (1);
Figur (4)
die Seitenansicht eines anderen erfindungsgemäßen Werkzeuges;
Figur (5)
eine Vergrößerung des oberen Teils des Antriebes des Werkzeuges gemäß Figur (4) im Schnitt und
Figur (6)
eine dritte Ausführungsform des erfindungsgemäßen Werkzeuges in der Seitenansicht und schematisch dargestellt.
In the drawing, the invention is illustrated in more detail using several exemplary embodiments. Show it:
Figure (1)
the side view with partial sectional view of a tool according to the invention;
Figure (2)
the side view of a fine feed gear for a tool according to Figure (1) and
Figure (3)
the side view of another fine feed gear for the tool according to Figure (1);
Figure (4)
the side view of another tool according to the invention;
Figure (5)
an enlargement of the upper part of the drive of the tool according to the figure (4) on average and
Figure (6)
a third embodiment of the tool according to the invention in side view and shown schematically.

Das in Figur (1) dargestellte Werkzeug (1) hat einen geschnitten dargestellten Grundkörper (2) und einen daran anschließenden Werkzeughalter (3), der ein Oberwerkzeug (4) trägt. In einem Ausleger (5) ist ein komplementärer, als Unterwerkzeug dienender Bearbeitungsstempel (6) translatorisch, d. h. in der gewählten Darstellung vertikal beweglich geführt.The tool (1) shown in FIG. 1 has a basic body (2) shown in section and an adjoining tool holder (3) which carries an upper tool (4). In a cantilever (5) is a complementary processing punch (6) serving as a lower tool, which is translational, ie. H. guided vertically movable in the selected representation.

In dem Grundkörper (2) ist eine Grobvorschubeinrichtung (7) angeordnet, die im wesentlichen aus einem vertikal geführten Schlitten (8) und einer Spindel (9) mit relativ starker Gewindesteigung besteht. Statt der Spindel (9) sind auch andere Elemente, wie Keile, Kurvenscheiben etc. denkbar. Die Spindel (9) bewegt sich bei ihrer Verdrehung in Richtung ihrer Längsachse. Ihre obenseitige Spitze greift in eine passende Ausnehmung (10̸), wo sie sich über eine Druckfeder (11) an dem Schlitten (8) abstützt.A rough feed device (7) is arranged in the base body (2) and essentially consists of a vertically guided slide (8) and a spindle (9) with a relatively strong thread pitch. Instead of the spindle (9), other elements such as wedges, cams, etc. are also conceivable. The spindle (9) moves in the direction of its longitudinal axis when it is rotated. Its top tip engages in a suitable recess (10̸), where it is supported on the slide (8) via a compression spring (11).

Im oberen Teil des Schlittens (8) ist eine Rolle (12) um eine horizontale Achse drehbar gelagert. Sie ist mit einem hier nicht näher dargestellten elektrischen Antrieb - es kommen auch mechanische Antriebe in Frage - verbunden und steht über das obere Ende des Schlittens (8) vor. Der Schlitten (8) ist mit dem Bearbeitungsstempel (6) über eine Blattfeder (14) verbunden, die bestrebt ist, beide Teile auf einem bestimmten Abstand zu halten.In the upper part of the carriage (8), a roller (12) is rotatably mounted about a horizontal axis. It is connected to an electric drive, not shown here - mechanical drives are also possible - and protrudes beyond the upper end of the slide (8). The carriage (8) is connected to the processing stamp (6) via a leaf spring (14) which strives to keep both parts at a certain distance.

Der Rolle (12) zugeordnet ist ein Feinvorschubgetriebe (15), zu der eine Kurvenscheibe (16) gehört, die über eine horizontale Achse (17) frei drehbar an dem Bearbeitungsstempel (6) gelagert ist. An ihrer Stirnseite hat sie eine Kurvenbahn (18), deren Abstand zur Achse (17) sich nach oben hin stetig vergrößert. Am Ende der Kurvenbahn (18) befindet sich eine flache Einwölbung (19). Dort ist eine Zugfeder (20̸) angelenkt, die mit dem Ausleger (5) verbunden ist und bestrebt ist, die Kurvenscheibe (16) im Uhrzeigersinn zu verdrehen. Dabei begrenzt ein Anschlag (21) am Bearbeitungsstempel (6) die Bewegung der Kurvenscheibe (16) im Uhrzeigersinn.The roller (12) is assigned a fine feed gear (15), to which a cam plate (16) belongs, which is freely rotatably mounted on the processing stamp (6) via a horizontal axis (17) is. On its end face it has a curved path (18), the distance to the axis (17) of which increases continuously upwards. At the end of the curved path (18) there is a flat arch (19). There is a tension spring (20̸) articulated, which is connected to the boom (5) and strives to turn the cam (16) clockwise. A stop (21) on the processing stamp (6) limits the movement of the cam disc (16) clockwise.

In der gezeichneten Stellung befinden sich Grobvorschubeinrichtung (7), Feinvorschubgetriebe (15) und Bearbeitungsstempel (6) in der Anfangsstellung mit dem größten Abstand zwischen Oberwerkzeug (4) und Bearbeitungsstempel (6). Es kann dann ein Werkstück (22) - hier ein Kabel mit einem aufzupressenden Kabelschuh - in den Raum zwischen Bearbeitungsstempel (6) und Oberwerkzeug (4) eingelegt werden. Anschließend wird die Spindel (9) in einer solchen Richtung verdreht, daß der Schlitten (8) und damit auch der Bearbeitungsstempel (6) in Richtung auf das Werkstück (22) mit vergleichsweise hoher Geschwindigkeit bewegt werden. Dabei kommt die Kurvenscheibe (16) schon nach einem kurzen Weg an einem Vorsprung (23) zur Anlage. Bei weiterem Vorschub sorgt dieser Vorsprung (23) dafür, daß die Kurvenscheibe (16) im Gegenuhrzeigersinn verschwenkt wird, und zwar um so mehr, je, mehr sich der Bearbeitungsstempel (6) dem Werkstück (22) annähert.In the position shown, the rough feed device (7), fine feed gear (15) and machining punch (6) are in the initial position with the greatest distance between the upper tool (4) and the machining punch (6). A workpiece (22) - here a cable with a cable lug to be pressed on - can then be inserted into the space between the processing stamp (6) and the upper tool (4). The spindle (9) is then rotated in such a direction that the slide (8) and thus also the machining stamp (6) are moved in the direction of the workpiece (22) at a comparatively high speed. The cam disc (16) comes to rest on a projection (23) after a short distance. With further feed, this projection (23) ensures that the cam disc (16) is pivoted counterclockwise, and the more, the closer the machining stamp (6) approaches the workpiece (22).

Bei Anlage des Bearbeitungsstempels (6) am Werkstück (22) kann die Spindel (9) noch um einen solchen Betrag weitergedreht werden, bis ein Absatz (9a) am Schlitten (8) zur Anlage kommt und dort einen Kontakt anspricht, der den Antrieb für die Rolle (12) zuschaltet. Die Rolle (12) wird dann im Uhrzeigersinn verdreht, wodurch die Kurvenscheibe (16) auf Grund der Steigung der Kurvenbahn (18) dafür sorgt, daß der Bearbeitungsstempel (6) nach oben drückt und so das Werkstück (22) verformt wird. Dies geht nur noch über den verbliebenen Rest der Kurvenbahn (18), dessen Erstreckung um so geringer ist, je kleiner der Querschnitt des Werkstückes (22) ist. Die Spindel (9) ist dabei so beschaffen, daß sie selbsthemmend wirkt, so daß sich die Rolle (12) gegen die Spindel (9) abstützen kann. In der Endstellung fährt die Rolle (12) in die Einwölbung (19), wodurch der Bearbeitungsstempel (6) eine Entlastung erfährt, also nur noch unter der Wirkung der Blattfeder (14) am Werkstück (23) anliegt. Die Grobvorschubeinrichtung (7) kann dann zurückgefahren und das Werkstück (22) entnommen werden. Die Kurvenscheibe (16) wird anschließend durch die Feder (20̸) in die Ausgangsstellung zurückgedreht. Nach weiterem Zurückfahren der Spindel (9) kann dann erneut ein Werkstück eingelegt werden.When the processing punch (6) is placed on the workpiece (22), the spindle (9) can be rotated by such an amount until a shoulder (9a) comes to rest on the slide (8) and there contacts a contact that drives the drive the role (12) switches on. The roller (12) is then rotated clockwise, whereby the cam disc (16) due to the slope of the cam track (18) ensures that the processing punch (6) presses up and the workpiece (22) is deformed. This is only possible with the rest of the curve track (18), the extent of which is smaller the smaller the cross section of the workpiece (22). The spindle (9) is designed so that it acts self-locking, so that the roller (12) can be supported against the spindle (9). In the end position, the roller (12) moves into the arch (19), whereby the processing stamp (6) is relieved, ie it only bears against the workpiece (23) under the action of the leaf spring (14). The coarse feed device (7) can then be retracted and the workpiece (22) removed. The cam (16) is then turned back to the starting position by the spring (20̸). After the spindle (9) has been moved back further, a workpiece can be inserted again.

Das in Figur (1) dargestellte Werkzeug (1) kann auch in der Weise abgewandelt sein, daß die Rolle (12) und die Kurvenscheibe (16) vertauscht sind, d.h. die Kurvenscheibe (16) am Schlitten (8) und die Rolle (12) am Bearbeitungsstempel (6) gelagert sind, wobei dann die Kurvenscheibe (16) angetrieben ist.The tool (1) shown in Figure (1) can also be modified in such a way that the roller (12) and the cam disc (16) are interchanged, i.e. the cam disk (16) is mounted on the slide (8) and the roller (12) on the processing stamp (6), the cam disk (16) then being driven.

Die Figuren (2) und (3) zeigen eine Modifikation des Werkzeuges (1) gemäß Figur (1), wobei sich die Darstellung auf die Ausbildung des Feinvorschubgetriebes (24) beschränkt. Bei dem Ausführungsbeispiel gemäß Figur (2) besteht das Feinvorschubgetriebe (24) aus einer Rolle (25) und einer Kreissegmentscheibe (26). Die Rolle (25) ist das Pendant zu der Rolle (12) bei dem Werkzeug (1) gemäß Figur (1), während die Kreissegmentscheibe (26) in ihrer Funktion der Kurvenscheibe (16) entspricht.Figures (2) and (3) show a modification of the tool (1) according to Figure (1), the illustration being limited to the design of the fine feed gear (24). In the exemplary embodiment according to FIG. (2), the fine feed gear (24) consists of a roller (25) and a circular segment disc (26). The roller (25) is the counterpart to the roller (12) in the tool (1) according to FIG. (1), while the circular segment disc (26) corresponds in its function to the cam disc (16).

Die Kreissegmentscheibe (26) hat stirnseitig eine Kreisbahn (27), mit der sie an der Rolle (25) anliegt. Über einen Zapfen (28) ist sie drehbar und vertikal verschieblich in einer Kulisse (29) des hier nicht näher dargestellten Werkzeuges gelagert. Im Bereich des Zapfens (28) hat die Kreissegmentscheibe (26) eine Kurvenbahn (30̸), an der ein Bearbeitungsstempel (31) anliegt. Im übrigen ist die Kreissegmentscheibe (26) durch eine Zugfeder (32) im Uhrzeigersinn vorgespannt. Im Bereich der Zugfeder (32) hat die Kreisbahn (27) eine Einwölbung (34).The circular segment disc (26) has a circular path (27) on the end face with which it rests on the roller (25). It is rotatably and vertically displaceably mounted in a link (29) of the tool (not shown here) via a pin (28). In the area of the pin (28) Circular segment disc (26) has a curved path (30̸), on which a processing stamp (31) bears. In addition, the circular segment disc (26) is biased clockwise by a tension spring (32). The circular path (27) has an arch (34) in the area of the tension spring (32).

Bei der Vertikalverschiebung der Rolle (25) mit Hilfe der hier nicht näher dargestellten Grobvorschubeinrichtung werden die Kreissegmentscheibe (26) und damit auch der Bearbeitungsstempel (31) nach oben gedrückt, bis sie zur Anlage am Werkstück kommen. Dabei kann auch hier ein dem Anschlag (21) entsprechender Anschlag vorgesehen sein, damit es schon bei dem Schnellvorschub zu einer Verdrehung der Kreissegmentscheibe (26) im Gegenuhrzeigersinn kommt. Bei Anlage am Werkstück wird der Antrieb der Rolle (25) eingeschaltet mit der Folge, daß die Kreissegmentscheibe (26) im Gegenuhrzeigersinn verdreht wird. Dies wiederum bewirkt, daß die Steigung der Kurvenbahn (30̸) in dem Sinne wirksam wird, daß der Bearbeitungsstempel (31) - jetzt jedoch mit wesentlich verringerter Geschwindigkeit - weiter vertikal nach oben verschoben und damit das Werkstück verformt wird, bis die Rolle (25) in die Einwölbung (34) einfährt und die schon oben beschriebene Entlastung eintritt.During the vertical displacement of the roller (25) with the help of the rough feed device (not shown here in more detail), the circular segment disc (26) and thus also the processing stamp (31) are pressed upwards until they come to rest on the workpiece. A stop corresponding to the stop (21) can also be provided here so that the circular segment disc (26) is rotated counterclockwise even during the rapid feed. When resting on the workpiece, the drive of the roller (25) is switched on, with the result that the circular segment disc (26) is rotated counterclockwise. This in turn has the effect that the slope of the cam track (30̸) takes effect in the sense that the machining punch (31) - now however at a significantly reduced speed - is shifted vertically upwards and the workpiece is thus deformed until the roller (25) drives into the arch (34) and the relief described above occurs.

Figur (3) zeigt eine Modifikation von Figur (2), wobei hinsichtlich der gleich ausgebildeten Teile auf die Beschreibung gemäß Figur (2) Bezug genommen wird. Statt einer Kurvenbahn (30̸) ist in diesem Fall jedoch eine kreisförmige Exzenterbahn (33) vorgesehen, an der der Bearbeitungsstempel (31) anliegt. Durch Verdrehung der Kreissegmentscheibe (26) kann sogar über den Totpunkt der Exzenterbahn (33) gefahren werden, so daß für den Bearbeitungsstempel (38) eine Entlastung eintritt, was die Herausnahme des Werkstückes erleichtert. Die Kreissegmentscheibe (26) kann wieder zurückgedreht werden, wenn die Grabvorschubeinrichtung zurückgefahren worden ist.Figure (3) shows a modification of Figure (2), reference being made to the description according to Figure (2) with regard to the parts of the same design. Instead of a curved path (30̸), however, a circular eccentric path (33) is provided in this case, on which the processing stamp (31) bears. By rotating the circular segment disc (26), it is even possible to move over the dead center of the eccentric track (33), so that there is a relief for the processing stamp (38), which facilitates the removal of the workpiece. The circular segment disc (26) can be turned back when the digging feed device has been moved back.

Das in den Figuren (4) und (5) dargestellte Werkzeug (41) hat einen Grundkörper (42), der nach oben hin in einen Werkzeughalter (43) ausläuft, welcher ein Oberwerkzeug (44) trägt. In dem Grundkörper (42) ist ein Bearbeitungsstempel (45) verschieblich gelagert, und zwar in Richtung auf das Oberwerkzeug (44). Mit ihm kann ein Werkstück (46) verformt werden, wenn er gegen das Oberwerkzeug (44) bewegt wird.The tool (41) shown in Figures (4) and (5) has a base body (42) which ends in a tool holder (43) which carries an upper tool (44). A processing stamp (45) is mounted displaceably in the base body (42), specifically in the direction of the upper tool (44). It can be used to deform a workpiece (46) when it is moved against the upper tool (44).

Im unteren Teil des Grundkörpers (42) ist eine Grobvorschubeinrichtung (47) angeordnet, die eine in einem Gewinde (48) gelagerte, selbsthemmende Spindel (49) aufweist. Diese faßt in einen Schlitten (50̸), welcher translatorisch und koaxial zu dem Bearbeitungsstempel (45) geführt ist.A coarse feed device (47) is arranged in the lower part of the base body (42) and has a self-locking spindle (49) mounted in a thread (48). This fits into a carriage (50̸), which is guided translationally and coaxially to the processing stamp (45).

Bearbeitungsstempel (45) und Schlitten (50̸) sind über ein Feinvorschubgetriebe (51) verbunden, welches aus einer an dem Bearbeitungsstempel (45) angelenkten Kurbelstange (52) und einem Kniehebel (53) besteht. Der Kniehebel (53) weist einen Kniehebelarm (54) auf, der gelenkig mit der Kurbelstange (52) verbunden ist. Der Kniehebel (52) ist an dem Schlitten (50̸) über eine horizontale Achse (55) gelagert und hat einen langgestreckten Kniehebelfortsatz (56). Dessen freies Ende wird über eine Zugfeder (57) gegen das untere Ende einer Kolbenstange (58) gedrückt, welche mit einem Kolben (59) verbunden ist, der wiederum in einem Hydraulikzylinder (60̸) vertikal beweglich geführt ist. Der Hydraulikzylinder (60̸) ist fest mit dem Werkzeughalter (43) verbunden.Processing stamp (45) and slide (50̸) are connected via a fine feed gear (51), which consists of a crank rod (52) articulated on the processing stamp (45) and a toggle lever (53). The toggle lever (53) has a toggle lever arm (54) which is articulated to the crank rod (52). The toggle lever (52) is mounted on the carriage (50̸) via a horizontal axis (55) and has an elongated toggle extension (56). Its free end is pressed by a tension spring (57) against the lower end of a piston rod (58) which is connected to a piston (59), which in turn is vertically movably guided in a hydraulic cylinder (60̸). The hydraulic cylinder (60̸) is firmly connected to the tool holder (43).

Der Hydraulikzylinder (60̸) hat einen Hydraulikeingang (61), der mit einer Hydraulikölzufuhr beispielsweise in Form einer Handpumpe verbindbar ist. Ferner ist ein Hydraulikausgang (62) vorhanden, der einen Rücklauf des Hydrauliköls ermöglicht. Zu Beginn des Hydraulikausgangs (62) ist ein vertikal beweglicher Ventilteller (63) vorgesehen, der durch eine Druckfeder (64) beaufschlagt ist. Auf den Ventilteller (63) wirkt in der gezeigten Stellung ein Fortsatz (65) der Kolbenstange (58).The hydraulic cylinder (60̸) has a hydraulic input (61) which can be connected to a hydraulic oil supply, for example in the form of a hand pump. There is also a hydraulic outlet (62) which enables the hydraulic oil to return. At the beginning of the hydraulic outlet (62), a vertically movable valve plate (63) is provided, which is acted upon by a compression spring (64). In the position shown, an extension (65) of the piston rod (58) acts on the valve plate (63).

Beim Schnellvorschub mit Hilfe der Spindel (49) bleibt die Kolbenstange (58) in der gezeigten Stellung und bildet einen Anschlag für den Kniehebelfortsatz (56). Der Ventilteller (63) sperrt den Hydraulikausgang (62). Der Bearbeitungsstempel (45) wird in Richtung auf das Werkstück (46) bewegt, wobei der Kniehebel (53) auf Grund der Anlage an der Kolbenstange (58) im, Uhrzeigersinn verschwenkt wird, wie dies gestrichelt dargestellt ist. Hierdurch verkürzt sich der Resthub des Feinvorschubgetriebes (51) bis zu seiner Endstellung um so mehr, je größer der durch den Schnellvorschub bewirkte Weg und damit je kleiner der Querschnitt des Werkstückes (46) ist. Vor der gestreckten Lage von Kniehebelarm (54) und Kurbelstange (52) erreicht der Bearbeitungsstempel (45) das Werkstück (46). Da mit der Grobvorschubeinrichtung (47) keine große Kraft ausgeübt werden kann, wird der Schnellvorschub dann unterbrochen.During rapid feed using the spindle (49), the piston rod (58) remains in the position shown and forms a stop for the toggle extension (56). The valve plate (63) blocks the hydraulic outlet (62). The processing stamp (45) is moved in the direction of the workpiece (46), the toggle lever (53) being pivoted in a clockwise direction due to the abutment on the piston rod (58), as shown in dashed lines. This shortens the remaining stroke of the fine feed gear (51) to its end position, the greater the distance caused by the rapid feed and thus the smaller the cross section of the workpiece (46). Before the toggle lever arm (54) and crank rod (52) are in the extended position, the processing stamp (45) reaches the workpiece (46). Since the coarse feed device (47) cannot exert a large force, the rapid feed is then interrupted.

Mit einer hier nicht näher dargestellten Pumpe wird dann Hydrauliköl über den Hydraulikeingang (61) in den freien Raum oberhalb des Kolbens (59) eingeleitet. Hierdurch werden der Kolben (59) und damit auch die Kolbenstange (58) nach unten getrieben, wobei der entstehende Druck den Ventilteller (63) in der angehobenen Stellung hält, der Hydraulikausgang (62) also verschlossen bleibt. Der Kniehebel (53) wird hierdurch weiter im Uhrzeigersinn verdreht mit der Folge, daß der Bearbeitungsstempel (45) zwecks Umformung des Werkstückes (46) in Richtung des Oberwerkzeuges (44) bewegt wird. Diese Bewegung hält an, bis die Kurbelstange (52) und der Kniehebel (53) eine gestreckte Lage haben, also ihren oberen Totpunkt erreicht haben.With a pump not shown here, hydraulic oil is then introduced via the hydraulic input (61) into the free space above the piston (59). As a result, the piston (59) and thus also the piston rod (58) are driven downward, the resulting pressure holding the valve disk (63) in the raised position, the hydraulic outlet (62) thus remaining closed. As a result, the toggle lever (53) is rotated further clockwise, with the result that the processing punch (45) is moved in the direction of the upper tool (44) for the purpose of forming the workpiece (46). This movement continues until the crank rod (52) and the toggle lever (53) have an extended position, that is to say they have reached their top dead center.

Nach Überschreiten dieses oberen Totpunktes und damit einer leichten Rückwärtsbewegung des Bearbeitungsstempels (45) kommt es zu einer solchen Druckentlastung im Hydraulikzylinder (60̸), daß die Druckfeder (64) den Ventilteller (63) nach unten drückt und somit den Hydraulikausgang (62) öffnet. Nun kann der Bearbeitungsstempel (45) mit Hilfe der Grobvorschubeinrichtung (47), also der Spindel (49), ein wenig zurückbewegt werden, um die Auffederung des Werkzeughalters (43) zu kompensieren. Die Zugfeder (57) sorgt anschließend für die Verschwenkung des Kniehebels (53) entgegen dem Uhrzeigersinn und damit für eine Anhebung von Kolbenstange (58) und Kolben (59). Dabei verläßt das in den Hydraulikzylinder (60̸) zuvor eingepumpte Hydrauliköl den Hydraulikzylinder (60̸) durch den Hydraulikausgang (62).After exceeding this top dead center and thus a slight backward movement of the processing plunger (45) there is such a pressure relief in the hydraulic cylinder (60̸) that the compression spring (64) presses the valve plate (63) down and thus opens the hydraulic outlet (62). Now he can Machining stamp (45) with the help of the rough feed device (47), ie the spindle (49), are moved back a little to compensate for the spring-back of the tool holder (43). The tension spring (57) then pivots the toggle lever (53) counterclockwise and thus raises the piston rod (58) and piston (59). The hydraulic oil previously pumped into the hydraulic cylinder (60̸) leaves the hydraulic cylinder (60̸) through the hydraulic outlet (62).

Statt des Hydraulikzylinders (60̸) kommen natürlich auch andere Antriebseinrichtungen in Frage, z.B. Kurvenscheiben, Exenter oder Spindeln. Dabei muß jedoch immer dafür gesorgt werden, daß nach Überschreiten des Todpunktes der Antrieb durch die Kraftentlastung in die Ausgangslage zurückkehren kann.Instead of the hydraulic cylinder (60̸), other drive devices are of course also possible, e.g. Cam discs, eccentrics or spindles. However, it must always be ensured that the drive can return to the starting position after the dead center has been exceeded due to the relief of force.

Figur (6) zeigt eine weitere Variante eines erfindungsgemäßen Werkzeuges (71) in sehr schematisch gehaltener Darstellung. Das Werkzeug (71) hat einen Grundkörper (72), von dem hier allerdings nur ein untenseitiges Gewinde (73) und obenseitig eine Schiebeführung (74) gezeichnet ist. In der Schiebeführung (74) ist ein Bearbeitungsstempel (75) vertikal beweglich geführt. Ihm gegenüber befindet sich ein Oberwerkzeug (76), der an einem Werkzeughalter (77) angebracht ist, welcher wiederum mit dem Grundkörper (72) gerätefest verbunden ist.Figure (6) shows a further variant of a tool (71) according to the invention in a very schematic representation. The tool (71) has a base body (72), of which only an underside thread (73) and a sliding guide (74) are drawn on the top. In the sliding guide (74), a processing stamp (75) is guided so that it can move vertically. Opposite is an upper tool (76), which is attached to a tool holder (77), which in turn is connected to the base body (72) in a device-fixed manner.

In dem Gewinde (73) ist eine Spindel (78) geführt, die in einen Schlitten (79) einfaßt. Der Schlitten (79) ist - was hier nicht näher dargestellt ist - in gleicher Weise axial verschieblich im Grundkörper (72) gelagert wie der Schlitten (8) im Ausführungsbeispiel gemäß Figur (1). Spindel (78) und Schlitten (79) bilden eine Grobvorschubeinrichtung (80̸).In the thread (73) a spindle (78) is guided, which engages in a carriage (79). The carriage (79) - which is not shown here in more detail - is axially displaceably mounted in the base body (72) in the same way as the carriage (8) in the exemplary embodiment according to FIG. (1). Spindle (78) and slide (79) form a coarse feed device (80̸).

Der Bearbeitungsstempel (75) und der Schlitten (79) sind über ein Feinvorschubgetriebe (81) mit zwei Kurbelstangen (82, 83) verbunden, wobei die Kurbelstangen (82, 83) über ein Gelenk (84) untereinander gekoppelt sind. Das Gelenk (84) stützt sich an einem Schieber (85) ab, der im Grundkörper (72) quer zur Bewegungsrichtung des Bearbeitungsstempels (75) bzw. der Spindel (78) verschieblich geführt ist. Der Schieber (85) hat gelenkseitig eine schräggestellte Anlagefläche (86), wobei die Schrägstellung so beschaffen ist, daß sie nach oben hin einen spitzen Winkel mit der Achse der Spindel (78) einschließt.The processing punch (75) and the slide (79) are connected to two crank rods (82, 83) via a fine feed gear (81), the crank rods (82, 83) being coupled to one another via a joint (84). The joint (84) is supported on a slide (85), which is displaceably guided in the base body (72) transversely to the direction of movement of the processing die (75) or the spindle (78). The slide (85) has an inclined contact surface (86) on the joint side, the inclined position being such that it encloses an acute angle with the axis of the spindle (78) upwards.

Der Schieber (85) liegt rückseitig an einer Kurvenscheibe (87) an, die in einem sich horizontal erstreckenden Langloch (88) drehbar gelagert ist. Mit der Kurvenscheibe (87) fest verbunden ist eine Antriebsscheibe (89), die stirnseitig über einen Teil des Umfangs mit Ratschenzacken (90̸) versehen ist. Die Lagerung von Kurvenscheibe (87) und Antriebsscheibe (89) in dem Langloch (88) geschieht über einen Drehzapfen (91), der über eine Blattfeder (92) derart federbeaufschlagt ist, daß die Kurvenscheibe (87) gegen den Schieber (85) gedrückt wird. Das Langloch (88) gehört ebenso wie die Einspannung (93) der Blattfeder (92) zum Grundkörper (72), ohne daß dies hier näher dargestellt ist.The slide (85) bears on the rear of a cam disk (87) which is rotatably mounted in a horizontally extending slot (88). A drive pulley (89) is firmly connected to the cam disk (87) and is provided with ratchet teeth (90̸) on the end face over part of the circumference. The cam disc (87) and drive disc (89) are supported in the slot (88) via a pivot pin (91) which is spring-loaded via a leaf spring (92) such that the cam disc (87) is pressed against the slide (85) becomes. The elongated hole (88), like the clamping (93) of the leaf spring (92), belongs to the base body (72), without this being shown in more detail here.

Die Antriebsscheibe (89) wirkt mit einem Ratschenhebel (94) zusammen, der über eine Druckfeder (95) an einen gerätefesten Anschlag (96) zur Anlage gebracht wird. Der Ratschenhebel (94) ist gelenkig mit einem Handhebel (97) verbunden, welcher über ein gerätefestes Gelenk (98) mit dem Grundkörper (72) verbunden ist.The drive pulley (89) interacts with a ratchet lever (94), which is brought into contact with a device-fixed stop (96) via a compression spring (95). The ratchet lever (94) is connected in an articulated manner to a hand lever (97) which is connected to the base body (72) via a device-fixed joint (98).

Oberhalb des Ratschenhebels (94) befindet sich eine Rücklaufsperre (99), welche mittels einer Druckfeder (10̸0̸) an einem gerätefesten Anschlag (10̸1) angedrückt und so in einer definierten Lage gehalten wird. Die Rücklaufsperre (99) ist mit dem Grundkörper (72) über ein Gelenk (10̸2) verbunden.Above the ratchet lever (94) there is a backstop (99), which is pressed against a fixed stop (10̸1) by means of a compression spring (10̸0̸) and thus held in a defined position. The backstop (99) is connected to the base body (72) via a joint (10̸2).

Das Werkzeug (71) wird wie folgt betätigt. Zunächst befinden sich alle Teile in der gezeigten Stellung. Es wird dann die Grobvorschubeinrichtung (80̸) durch Verdrehen der Spindel (78) betätigt, wodurch der Bearbeitungsstempel (75) schnell gegen das am Oberwerkzeug (76) anliegende Werkstück (10̸3) gefahren wird. Dabei stützt sich das Gelenk (84) an der Anlagefläche (86) des Schiebers (85) ab und läuft die Schräge hoch. Dies hat zur Folge, daß der Winkel zwischen den beiden Kurbelstangen (82, 83) vergrößert wird, und zwar um so mehr, je größer der mit der Grobvorschubeinrichtung (80̸) zurückgelegte Weg und damit je kleiner der Querschnitt des Werkstückes (10̸3) ist. Der Schieber (85) bleibt dabei in der gezeigten Stellung, d. h. bei dem Schnellvorschub ist der seitliche Druck auf den Schieber (85) geringer als die in umgekehrter Richtung auf den Drehzapfen (91) wirkende Blattfeder (92).The tool (71) is operated as follows. First, all parts are in the position shown. The coarse feed device (80̸) is then turned by turning the spindle (78) actuated, whereby the machining punch (75) is quickly moved against the workpiece (10̸3) resting on the upper tool (76). The joint (84) is supported on the contact surface (86) of the slide (85) and runs up the slope. This has the consequence that the angle between the two crank rods (82, 83) is increased, and the more, the greater the distance traveled with the rough feed device (80̸) and thus the smaller the cross section of the workpiece (10̸3). The slide (85) remains in the position shown, that is, with the rapid feed, the lateral pressure on the slide (85) is less than the leaf spring (92) acting in the opposite direction on the pivot (91).

Bei Anlage des Bearbeitungsstempels (75) am Werkstück (10̸3) erhöht sich jedoch die quer auf den Schieber (85) wirkende Kraftkomponente. Dies hat zur Folge, daß der Schieber (85) und damit die Kurvenscheibe (87) gegen die Wirkung der Blattfeder (92) in der gezeigten Darstellung nach rechts bewegt werden, wobei sich der Drehzapfen (91) innerhalb des Langloches (88) bewegt. Da hierbei die fest mit der Kurvenscheibe (87) verbundene Antriebsscheibe (89) mitbewegt wird, kommen deren Ratschenzacken (90̸) in Eingriff mit dem Ratschenhebel (94) und der Rücklaufsperre (99). Jezt kann mit Hilfe des Handhebels (97) durch dessen Verschwenkung entsprechend dem eingezeichneten Doppelpfeil die Antriebsscheibe (89) im Uhrzeigersinn Stück für Stück bewegt werden, wobei eine Rückbewegung der Antriebsscheibe (89) jeweils durch die Rücklaufsperre (99) verhindert wird. Dies hat eine entsprechende Verdrehung der Kurvenscheibe (87) zur Folge. Deren Kurvenbahn (10̸4), mit der sie an der Rückseite des Schiebers (85) anliegt, ist so geformt, daß bei ihrer Verdrehung im Uhrzeigersinn der Schieber (85) in Richtung des Gelenks (84) bewegt wird. Dies wiederum bewirkt eine Streckung der Kurbelstangen (82, 83) und damit eine Verschiebung des Bearbeitungsstempels (75) in Richtung des Werkstückes (10̸3), so daß letzteres verformt wird. Dabei behält die Spindel (78) auf Grund ihrer selbsthemmenden Lagerung in dem Gewinde (73) ihre Stellung.When the processing die (75) is placed on the workpiece (10̸3), however, the force component acting transversely on the slide (85) increases. This has the consequence that the slide (85) and thus the cam disc (87) are moved to the right against the action of the leaf spring (92) in the illustration shown, the pivot pin (91) moving within the elongated hole (88). Since the drive pulley (89), which is firmly connected to the cam disc (87), is also moved, its ratchet teeth (90acken) come into engagement with the ratchet lever (94) and the backstop (99). Now, with the help of the hand lever (97), the drive pulley (89) can be moved clockwise piece by piece by pivoting it in accordance with the double arrow drawn in, clockwise movement of the drive pulley (89) being prevented by the backstop (99). This results in a corresponding rotation of the cam disc (87). The cam track (10̸4) with which it rests on the back of the slide (85) is shaped so that when it is turned clockwise, the slide (85) is moved in the direction of the joint (84). This in turn causes the crank rods (82, 83) to stretch and thus to move the processing punch (75) in the direction of the workpiece (10̸3) so that the latter is deformed. The spindle (78) remains open Because of their self-locking storage in the thread (73) their position.

Die Verschiebung des Schiebers (85) kann bis über den oberen Totpunkt, also die gestreckte Lage betrieben werden. Es tritt dann eine spontane Entlastung ein, so daß der Bearbeitungsstempel (75) mittels der Grobvorschubeinrichtung (80̸) zurückbewegt werden kann. Auf Grund der Entlastung wird die Blattfeder (92) den Drehzapfen (91) wieder in die gezeigte Stellung befördern, so daß die Antriebsscheibe (89) wieder aus dem Eingriff mit dem Ratschenhebel (94) und der Rücklaufsperre (99) kommt. Mittels einer hier nicht näher dargestellten Federanordnung kann dann eine Rückbewegung der Kurvenscheibe (87), des Schiebers (85) und der Kurbelstangen (82, 83) bewirkt werden, bis die gezeigte Ausgangsstellung wieder erreicht ist.The slide (85) can be moved beyond the top dead center, ie the extended position. Then there is a spontaneous relief, so that the processing stamp (75) can be moved back by means of the rough feed device (80 (). Due to the relief, the leaf spring (92) will move the pivot pin (91) back into the position shown, so that the drive disc (89) comes out of engagement with the ratchet lever (94) and the backstop (99). By means of a spring arrangement, not shown here, the cam disc (87), the slide (85) and the crank rods (82, 83) can be moved back until the starting position shown is reached again.

Claims (23)

  1. Tool for processing, in particular moulding of tools (22, 46, 103), comprising a moving processing punch (6, 31, 45, 75) and a feed mechanism for its feed movement, characterised in that the feed mechanism comprises both a coarse feed mechanism (7, 47, 80) for rapid forward movement of the processing punch (6, 31, 45, 75) until abutting the workpiece (22, 46, 103) and a mechanical fine feed gearing (15, 24, 51, 81) for further advance of the processing punch (6, 31, 45, 75) for the purpose of processing the workpiece (22, 46, 103), and the fine feed gearing (15, 24, 51, 81) has defined starting and end positions is coupled to the coarse feed mechanism (7, 47, 80) in such a manner that the fine feed gearing (15, 24, 51, 81) is adjusted when operating the coarse feed mechanism (7, 47, 80) in the direction of its end position.
  2. Tool according to Claim 1, characterised in that the fine feed gearing (15, 24, 51, 81) is positioned between the coarse feed mechanism (7, 47, 80) and the processing punch (6, 31, 45, 75) so that the distance between the latters is changeable by means of the fine feed gearing (15, 24, 51, 81).
  3. Tool according to Claim 1 or 2, characterised in that the fine feed gearing (15, 24, 51, 81) comprises a release mechanism (19) which becomes operational in the area of the end position and permits a return movement of the processing punch (6, 31, 45, 75).
  4. Tool according to one of Claims 1 to 3, characterised in that the coarse feed mechanism (7) and the processing punch (6) are via a resilient connecting element (14) coupled in parallel to the fine feed gearing (15), and the connecting element (14) keeps the coarse feed mechanism (7) and the processing punch (6) during rapid feed at such distance that the fine feed gearing (15) remains disengaged, and the connecting element (14) is so resilient that the fine feed gearing (15) engages at or after abutment of the processing punch (6) on the workpiece (22).
  5. Tool according to one of Claims 1 to 4, characterised in that the fine feed gearing (15) comprises a drive, and a switch or a clutch is provided which is operated on engagement of the fine feed gearing (15).
  6. Tool according to one of Claims 1 to 5, characterised in that the fine feed gearing (15, 24) is designed as a curved track gearing.
  7. Tool according to Claim 6, characterised in that the curved track gearing (15, 25) comprises a rotatably mounted curved track element (16, 26) with a curved track (18, 30,. 33) having such incline so that a fine feed of the processing punch (6, 34) is caused when the curved track element (16, 26) is rotated.
  8. Tool according to Claim 7, characterised in that the curved track element (15) is designed as a curved plate (16) with endsided curved track (18).
  9. Tool according to Claim 8, characterised in that the curved track (18) has at the end of its incline a concavity (19).
  10. Tool according to Claim 8 or 9, characterised in that a stop (23) for the curved track element (16) is provided and arranged in such a manner that the curved track element (16) moves during a rapid feed against the stop (23), thus being rotated in the direction of its end position.
  11. Tool according to one of Claims 7 to 10, characterised in that the curved track element (16, 26) is rotatable from the starting position into the end position against the load of a spring (20, 32).
  12. Tool according to one of Claims 7 to 11, characterised in that the curved track element (16, 26) comprises a drive-roller track (18, 27) on which is seated a drive roller (12, 25) at least in an engaged position of the fine feed gearing (7, 24).
  13. Tool according to Claim 12, characterised in that the drive-roller track also forms the curved track (18).
  14. Tool according to Claim 12 or 13, characterised in that the curved track element (16) is mounted on the processing punch (6) and the drive-roller (12) on the coarse feed mechanism (7).
  15. Tool according to Claim 12, characterised in that the drive-roller (5) and the curved track element (26) are connected to the coarse feed mechanism, and the curved track element (26) comprises a separate curved track (30, 33) for abutment on the processing punch (31).
  16. Tool according to one of Claims 1 to 5, characterised in that the fine feed gearing (51, 81) comprises a lever gearing (52, 53, 82, 83) which connects the coarse feed mechanism (47, 80) and the processing punch (45, 75).
  17. Tool according to Claim 16, characterised in that the lever gearing comprises two hinged arms (52, 54, 82, 83), the angled position to each other is changeable.
  18. Tool according to Claim 17, characterised in that one hinged arm (54) comprises a hinge extension (56) which abuts a stop in such a manner that the angled position of the hinged arms (52, 54) changes during a rapid feed in the direction of their end position.
  19. Tool according to Claim 17, characterised in that the hinged connection (84) between the hinged arms (82, 83) has a guide (86) so that the angled position of the hinged arms (82, 83) changes during a rapid feed in the direction of their end position.
  20. Tool according to Claim 18 or 19, characterised in that the stop (58) or the guide (86) are movable via a drive mechanism (58-64, 87-102) in the meaning of an angular change.
  21. Tool according to Claim 20, characterised in that the drive mechanism (87-102) comprises a rotary inclining curved plate (87).
  22. Tool according to Claim 21, characterised in that the curved plate has at the end of its incline a concavity.
  23. Tool according to one of Claims 17 to 22, characterised in that the angled position of the hinged arms is changeable beyond their extended position.
EP94111435A 1993-08-05 1994-07-22 Tool for machining pieces Expired - Lifetime EP0637483B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4326337 1993-08-05
DE4326337 1993-08-05

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EP0637483A1 EP0637483A1 (en) 1995-02-08
EP0637483B1 true EP0637483B1 (en) 1997-09-24

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US (1) US5720199A (en)
EP (1) EP0637483B1 (en)
JP (1) JPH0751774A (en)
AT (1) ATE158530T1 (en)
AU (1) AU677400B2 (en)
DE (1) DE59404141D1 (en)
NO (1) NO942902L (en)

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ATE392277T1 (en) * 2001-09-11 2008-05-15 Emerson Electric Co CRIMPING ARRANGEMENT
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Also Published As

Publication number Publication date
EP0637483A1 (en) 1995-02-08
US5720199A (en) 1998-02-24
ATE158530T1 (en) 1997-10-15
NO942902D0 (en) 1994-08-04
NO942902L (en) 1995-02-06
AU6876594A (en) 1995-02-16
DE59404141D1 (en) 1997-10-30
AU677400B2 (en) 1997-04-24
JPH0751774A (en) 1995-02-28

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