EP1391254A1 - An arrangement for the intermittent forward feeding of a web material to a press and method for operating the same - Google Patents

Abstract

Displacement device for the intermittent movement of band-type raw material comprises an elongated rocker (14) with a fork-shaped first end (63) with two symmetrically arranged fork prongs (88, 89). A control rod is linked to the rocker. A coiled spring acts on the rocker along its middle axis (91). An upper displacement roller (8) is arranged symmetrically relative to a line bisecting its middle longitudinal axis and its symmetry plane coincides with the middle axis of the rocker. The invention also relates to corresponding methods for device operation.

Description

The present invention relates to a feed device for intermittently supplying a band-shaped blank to one with tools for intermittent Editing the band-shaped blank equipped Press, which feed device a housing, a first and a second feed roller, which Feed rollers for receiving an interposed and advancing strip-shaped blank are determined a first, intermittently working electrical Servomotor having, with at least the first feed roller is drive-connected, which first feed roller has a longitudinal central axis and relative to a perpendicular to its longitudinal central axis extending plane of symmetry is formed symmetrically, further an elongated Swingarm, which has a first and a second, to the first opposite end contains, in which rocker rotatably supports the first feed roller is which second feed roller on a first end portion a roller shaft arranged and with the same rigidly connected, which swingarm at its first end arranged on a first end portion of a rocker shaft and is rigidly connected to it, which Swinging wave at a second, opposite to the first arranged end portion rotatably mounted in the housing is, so that the rocker is cantilevered, a feed roller lift device having a Control rod containing the second end of the Swingarm is pivotally connected, which control rod a Further, a Vorschubwalzenanpressvorrichtung comprising a helical compression spring contains, which rests at one end on the rocker, which helical compression spring another Has longitudinal center axis.

The invention further relates to a method for operation of the aforementioned feed device, in which the feed device on the housing arranged threaded spindle housing, a motor with a Threaded spindle and a control device, on which threaded spindle arranged an adjusting nut and by rotating the threaded spindle along it is movable, further driven by a drive motor Eccentric disc having mounted on which a connecting rod is that when removed from the eccentric disc End at least approximately parallel to the threaded spindle extending slot, further a first, on the adjusting nut mounted double-armed lever device and a second one on the threaded spindle housing worn shaft mounted double-armed lever device which first two-armed lever device a first, engaged with the connecting rod and one second arm which hinged to a tab which in turn is attached to a first arm of the second double-armed Lever is hinged, on the second Arm a control rod assembly is hinged, which is hinged to the swingarm, and by an intermediate the rocker and the threaded spindle housing arranged Compression spring assembly, which the rocker with the therein stored harmonic with the first, upper feed roller against the lower shaft with the second, lower feed roller presses, and wherein the feed device having a control device and cooperating with a press, the one moving upper tool and a fixed one Lower tool has, which upper tool with a between a top dead center position and a bottom dead center position movable plunger connected is, and having a press control device, the with the control device of the feed device in conjunction stands, and at which the slot of the between a top dead center position and a bottom dead center position movable connecting rod an upper and a lower one End, the first arm of the first double-armed lever device over a slot passing through Bolt engaged with the connecting rod, wherein for insertion a new band-shaped blank between the first, upper feed roller and the second, lower feed roller the upper feed roller in a high-lift position is driven to a predetermined in this position Distance between the first, upper feed roller and the second, lower feed roller set.

Furthermore, the invention relates to a method for operating the feed device of the aforementioned Art in which the feed device on the Housing arranged threaded spindle housing, a motor having a threaded spindle and a control device, on which threaded spindle arranged an adjusting nut and by rotating the threaded spindle along the same is movable, further one of a drive motor driven eccentric disc, on which a connecting rod is mounted, the by the eccentric disc distant end at least approximately parallel has the threaded spindle extending slot further a first, on the adjusting nut mounted double-armed Lever and a second, on a threaded spindle housing worn shaft mounted double-armed Lever device having which first two-armed lever device a first, engaged and the connecting rod standing and a second arm, which is connected to a Leash is articulated, in turn, on a first arm the second double-armed lever device is articulated, hinged to the second arm of a control rod assembly is, which is hinged to the swingarm, and by a between the rocker and the threaded spindle housing arranged compression spring arrangement, which the Rocker with the harmonic stored therein with the first, upper feed roller against the lower shaft with the second, lower feed roller presses, and in which the feed device has a control device and interact with a press that is a moving one Upper tool and has a fixed lower tool, which upper tool with one between an upper Dead center position and a bottom dead center position movable plunger is connected, and the one press control device having, with the control device the feed device is in communication, and in which the slot of between a top dead center position and a bottom dead center position movable connecting rod has an upper and a lower end, the first Arm of the first double-armed lever device over one the slot passing through bolt engaged with the Connecting rod is.

The invention also relates to a method for Operation of the feed device of the aforementioned Art in which the advancing device on the housing arranged threaded spindle housing, a motor with a threaded spindle and a control device, on which threaded spindle arranged an adjusting nut and by rotating the threaded spindle along it is movable, further driven by a drive motor Eccentric disc, on which a connecting rod is stored, which when removed from the eccentric disc End at least approximately parallel to the threaded spindle extending slot, further a first, on the adjusting nut mounted double-armed lever device and a second one on the threaded spindle housing worn shaft mounted double-armed lever device which first two-armed lever device a first, engaged with the connecting rod and one second arm which hinged to a tab which in turn is attached to a first arm of the second double-armed Lever is hinged, on the second Arm a control rod assembly is hinged, which is hinged to the swingarm, and by an intermediate the rocker and the threaded spindle housing arranged Compression spring assembly, which the rocker with the therein stored harmonic with the first, upper feed roller against the lower shaft with the second, lower feed roller presses, and method in which the feed device comprising a control device and with a The press interacts with a moving upper tool and a fixed lower tool with one between one top dead center position and a bottom dead center position movable plunger is connected, and the one press control device having, with the control device the feed device is connected, and at which the slot of between a top dead center position and a bottom dead center position movable Pleuels has an upper and a lower end, the first Arm of the first double-armed lever device over a bolt passing through the slot engaged with the connecting rod is, which plunger of a rotating Drive is driven and the eccentric disc of the connecting rod is driven by a drive motor, which upper tool Gripping pins for precise positioning of the band-shaped Blanks in the press during the machining process has the same, which pegs in pre-punched Positioning holes moved in the band-shaped blank be, and which pins a conical head section have, wherein the first, upper feed roller then from the second, lower feed roller away in a Has intermediate release position, is moved when the conical Head sections partially in the positioning holes have been retracted and then back to the blank is discontinued when the conical head sections partially have been dug out of the positioning holes.

The presses mentioned here are in particular high-speed presses with stroke rates up to 2000 Strokes / minute. These presses are equipped with tools for machining one (or more) supplied band-shaped Blank, with punching, embossing, Bending, riveting, threading, etc. are performed.

The movement of the band-shaped blank, the is edited in the press, takes place intermittently, so gradually. During a processing step, e.g. a punching, obviously no Forward movement of the band-shaped blank. Often he will precisely positioned by means of gripping pins arranged in the tools So arrested. After completion of the processing step, after, for example, a punching tool been moved out of the punched hole is, the band-shaped blank by a predetermined Route advanced and stopped again, so that the next processing step to be performed can.

The feed resp. Feed movement of the band-shaped Blanks are made by one (or more, at Inlet and outlet of the press). or feed unit (or feed units) to the ribbon-shaped blank intermittently from a supply roll deduct and deliver to the press.

These feeders usually have Feed links on to advance the ribbon-shaped blank. This is clamped by the feed members and moved forward. When the feed links again return to their original position, the clamping is canceled. The clamping is additionally during the period temporarily suspended during which the tools on the band-shaped blank a processing step perform, especially in the case of pegs.

The training of these feeders must basically fulfill 3 main functions, namely the high ventilation (insert tape), the tape thickness adjustment (the top roller is on the tape, play in the Long hole of the connecting rod) and intermediate ventilation (belt ventilation before each punching operation).

There are versions of such feeders become known, in which the clamping members are formed as linearly moving clamps. Other versions have oscillating, rotational movements exporting segment rollers.

Also are feeders with electric Servo motors become known. Here is a first servomotor the feed operation of the clamping members and another, second servomotor for intermittent take-off associated with a clamping member of the band-shaped blank. Such servomotors are manufactured by several companies and sold. The operation of these servomotors is electronically controlled. Show these new feeders as feed members completely cylindrical, on Shafts arranged feed rollers, which intermittently always rotate in the same direction. From these feed rollers is one in one with the other servomotor Driven connected component stored due to its operation this feed roller against the band-shaped blank for clamping it and moved away from it for release becomes.

Play through the current high number of strokes the masses of moving parts of a feeder unit due to inertial forces and moments of inertia great role, and also have a big impact on the precision of the manufactured product. Further must move the arrangement and training of this Parts due to the time periods for acceleration and Delay of movements be such that an operation can be carried out safely with high stroke rates.

Next, in individual components through Force effects generated torsional moments arise, the can lead to a misalignment of the feed rollers, so that further the precision of the manufactured product affecting influences are caused.

It is thus an object of the present invention a device for intermittently feeding a band-shaped blank to create the minimum moving parts, wherein those parts, the high Accelerations and delays are subject have the smallest possible masses, no drive motors are present, the oscillating work, and the places of forces acting on the precise position the feed rollers have an influence chosen are that no roll misalignment can occur.

Another object of the invention is a feeding device to create, at which the at the Swing-hinged control rod, which is on the swingarm resting pressure spring and the first feed roller relative are arranged to each other such that the longitudinal central axis the control rod and the longitudinal center axis of Compression spring to determine a geometric plane with the Symmetrieebene the first feed roller coincides.

It is also an object of the invention, a feed device to create at which the second end the elongated swing fork forked with two forks is formed, which fork tines relative to a Longitudinal symmetry plane of the elongated rocker symmetrical are formed, and in which the elongated Rocker relative to the control rod, the compression spring and the first feed roller is arranged such that their Longitudinal plane also with the plane of symmetry coincides with the first feed roller coincident plane.

Another object of the invention is a To provide twin feed device, the two of Having mentioned feed devices, the arranged with their feed rollers facing each other are.

A still further object of the invention is a Method for operating the feed device mentioned above to create, in which to adjust the Hochlüftposition the first, upper feed roller said two control devices are controlled in such a way that the plunger in its top dead center position and the Connecting rod is controlled in its bottom dead center.

Yet another object of the invention is a Method for operating the feed device mentioned above to create, in which the connecting rod in one of Moved his top dead center remote position moves is, the adjusting nut by rotating the threaded spindle is moved downward until the first, upper Feed roller due to the pressure springs on the Rocker applied pressure on the band-shaped blank rests in which position the bolt from both ends the slot has a distance, so that strokes of the connecting rod with fixed bolt allows are.

Also, it is an object of the invention a method to operate the above-mentioned feed device to show, in which to adjust the intermediate release position the plunger by its rotating drive in an angular position before its bottom dead center position is brought, in which angular position the conical Head sections of the fishing pins only partially in the Positioning holes protrude, in which state the eccentric disc of the connecting rod an angular position in front of the assumes top dead center position, wherein the angular distance the plunger between said angular position and the bottom dead center position equal to the angular distance of Eccentric disc between their stated angular position and the top dead center position is that then the adjusting nut is moved down, leaving the bolt comes to rest against the lower end of the slot and the adjusting nut is moved even further down, until the band-shaped blank by the lifting of the first, upper feed roller due to the over the lever devices and the control rod assembly and swingarm transmitted Movement is loose, and that reached the position the adjusting nut for the said angular position the eccentric disc and the corresponding angular position the plunger in the corresponding control devices get saved.

Fig. 1 eine Seitenansicht einer Vorschubvorrichtung, teilweise im Schnitt gezeichnet, entlang der Linie I-I der Fig. 2 gezeichnet;

Fig. 2 einen Schnitt entlang der Linie II-II der Fig. 1;

Fig. 3 einen Schnitt entlang der Linie III-III der Figur 1;

Fig. 4 einen Schnitt entlang der Linie IV-IV der Figur 1;

Fig. 5 im vergrösserten Massstab bezeichnet, einen Teil der Figur 2, insbesondere die Schwinge und die mit ihr verbundenen Bauteile;

Fig. 6 in vergrössertem Massstab gezeichnet, einen Teil der Figur 4;

Fig. 7 vereinfacht die in der Figur 2 gezeigte Darstellung, wobei die Vorschubvorrichtung in der Vorschubstellung während dem Dauerbetrieb ohne Zwischenlüftung gezeigt ist;

Figur 8 vereinfacht die in der Figur 2 gezeigte Darstellung, in der die Vorschubvorrichtung in der Hochlüftstellung gezeigt ist;

Fig. 9 vereinfacht die in der Figur 2 gezeigte Darstellung, in der die Vorschubvorrichtung in der Zwischenlüftstellung gezeigt ist;

Fig. 10 schematisch die mit einer Stanzpresse zusammenwirkende Vorschubvorrichtung gemäss der vorliegenden Erfindung;

Fig. 11 eine Zwillingsausführung zum Vorschieben von zwei bandförmigen Rohlingen;

Fig. 12 eine Zwillingsausführung zum Vorschieben eines sehr breiten bandförmigen Rohlings;

Fig. 13 schematisch die Schwinge der Vorschubvorrichtung, mit der Steuerstange und ihrer Längsmittelachse und mit der Druckfeder und ihre Längsmittelachse;

Fig. 14 schematisch die obere Vorschubwalze mit ihrer Längsmittelachse;

Fig. 15 schematisch das erste Ende der Schwinge mit den zwei symmetrisch angeordneten Gabelzinken; und

Fig. 16 schematisch die Schwinge mit der Steuerstange, der Druckfeder, dem ersten Ende der Steuerstange und mit der ersten, oberen Vorschubwalze.

Below, the subject of the invention with reference to embodiments showing drawings explained in more detail. It shows

Fig. 1 is a side view of a feed device, partially drawn in section, along the line II of Fig. 2 drawn;

Fig. 2 is a section along the line II-II of Fig. 1;

3 shows a section along the line III-III of Figure 1;

Fig. 4 is a section along the line IV-IV of Figure 1;

Fig. 5 on an enlarged scale, a part of Figure 2, in particular the rocker and the components associated with it;

Fig. 6 drawn on an enlarged scale, a part of Figure 4;

Fig. 7 simplifies the illustration shown in Figure 2, wherein the feed device is shown in the feed position during continuous operation without intermediate ventilation;

Figure 8 simplifies the representation shown in Figure 2, in which the feed device is shown in the high release position;

Fig. 9 simplifies the illustration shown in Figure 2, in which the feed device is shown in the intermediate release position;

10 schematically shows the feed device cooperating with a stamping press according to the present invention;

11 shows a twin version for advancing two strip-shaped blanks;

Figure 12 is a twin version for advancing a very wide band-shaped blank.

Figure 13 shows schematically the rocker of the feed device, with the control rod and its longitudinal central axis and with the compression spring and its longitudinal central axis.

14 shows schematically the upper feed roller with its longitudinal center axis;

Fig. 15 shows schematically the first end of the rocker with the two symmetrically arranged forks; and

Fig. 16 shows schematically the rocker with the control rod, the compression spring, the first end of the control rod and the first, upper feed roller.

The device has a housing 1. One first servomotor 2, which simplifies the electronic Control 3 is indicated, is at its flange 4 flanged by bolts 5 on the housing 1.

This first servomotor 2 is in one way known so that it gradually performs intermittent rotational movements. The duration and the extent of a respective section of the rotational movement will depend on the one in the downstream Press to be performed processing controlled. This servomotor 2 has a drive shaft 6.

The feed device further has a Harmonic 7 on which a first, upper feed roller 8 is arranged, and has a lower shaft 9, on which a second, lower feed roller 10 is arranged is. The intermittent vorzuschiebende band-shaped Blank, usually a metal band, is indicated by the reference numeral 11 indicated. This band-shaped blank 11th is during the feed movement between the first Feed roller 8 and the second feed roller 10 clamped arranged. The first, upper feed roller 8 has a Longitudinal central axis 87, see FIG. 14.

The harmonic 7 is via roller bearings 12, 13 in a rocker 14 stored, which below in detail will be described.

The lower shaft 9 is about rolling bearings 95, 96 in Housing 1 stored.

According to the shown, preferred embodiment the harmonic 7 is in driving connection with the first Servomotor 2.

The harmonic is with an Oldham clutch 15 connected. This Oldham coupling 15 is necessary because the harmonic 7, as will be described, Transverse movements relative to the stationary drive shaft 6 of the first servo motor 2 performs.

This Oldham coupling 15 is of an upper Spur gear 16 followed, with a lower spur gear 17 meshes, which is connected to the lower shaft 9.

The connection of the upper spur gear 16 takes place with the drive shaft 6 of the first servomotor 2 by a multi-part clamping sleeve with a first clamping sleeve part 18 and a second clamping sleeve part 19th

The interaction of the clamping sleeve parts 18, 19 takes place by means of ring clamping elements 20. The clamping screws are indicated by the reference numeral 21.

The upper spur gear 16 is integral with formed the first clamping sleeve part 18, whereby a considerable Savings on moving masses is achieved.

According to another (not shown) execution is the first servo motor 2 directly with the second, lower feed roller connected, wherein the first, Upper feed roller 8 rotates by friction engagement becomes.

On a threaded housing arranged on the housing 1 27, another servo motor 28 is arranged. Its electronic control, i. their housing is indicated at 29.

This servomotor 28 serves to drive a Threaded spindle 30.

The servomotor 28 is merely an example to consider the drive of the threaded spindle 30. It can also from the servo motor 28 different drives to be available. The drive shaft of the servomotor 28 is indicated by the reference numeral 31. The connection between the drive shaft 31 of the servomotor 28 and the threaded spindle 30 takes place by means of a multipart clamping sleeve, a first clamping sleeve part 32, a second Clamping sleeve part 33 and ring clamping elements 34 has. The Clamping sleeve parts 32, 33 are by means of clamping screws 35th curious against each other.

The second clamping sleeve part 33 is over a Claw coupling 36 connected to the threaded spindle 30. The threaded spindle 30 is in turn via rolling bearings 37 and 38 mounted in the threaded spindle housing 27 and housing 1.

Thus, the threaded spindle 30 is independent stored free of play by the servo motor 28.

Because of the fact that ring clamping elements for connection Serve with the smooth motor shaft, can be a standard Servomotor, so no custom made used become.

On the threaded spindle 30 is an adjusting nut 39 arranged.

On this adjusting nut 39 is a double-armed Lever 40 with a first arm 41 and a second Arm 42 stored. This lever 40 is in the present Description text referred to as the first double-armed lever 40.

From Figure 3 it can be seen that the Adjusting nut 39 has a square cross-sectional shape and in a likewise a square cross-sectional shape having interior of the first double-armed Lever 40 is inserted. This is the adjusting nut 39 secured against twisting.

In the first arm 41 of a first double-armed Levers 40, a bolt 43 is inserted. This bolt 43 protrudes through a slot 59 in a connecting rod 45th

This connecting rod 45 is seated on an eccentric disc 46, which has a shaft 47 with a third drive motor 48, for example, a servo motor, drivingly connected is. The control of the drive motor 48 is indicated by the reference numeral 49.

The second arm 42 of the first double-armed Lever 40 is connected via a tab 50 on the first arm 51 of a hinged second double-armed lever 52. The second double-armed lever 52 is mounted on a shaft 53. The second arm 54 of the second double-armed lever 52 is clamped laterally on the shaft 53.

The shaft 53 is in the threaded spindle housing 27th sealed by means of seals 55, 56 oil-tight, so that a closed threaded spindle housing 27 as a closed Lube space is present in which the threaded spindle 30 and the components described maintenance are arranged in a closed space.

In particular, it can be seen from FIG. that the shaft 53 at one end of the threaded spindle housing 27 protrudes and that the second arm 54 on the protruding end is clamped.

This second arm 54 is via a ball and socket connection at an upper shaft portion 57 of a control rod 58 hinged, with a lower shaft portion 59 are bolted. The described shaft sections are by means of lock nuts 60 and 61 against a Twisting secured.

These parts described above form one Feed roller lift-off device whose function continues is described below.

The control rod 58 is at its lower end hinged to the rocker 14, wherein in this description the area of the articulation point on the swingarm 14 is referred to as the second end 64 of the rocker 14. Next, this control rod 58 has a longitudinal central axis 71 (FIG. 13).

The rocker 14 has a first end 63 and a second end 64. The rocker 14 is now at her first end 63 on a first end portion 65 of a Swing shaft 62 arranged and rigidly connected to the same. This rocker shaft 62 is at its second End portion 66, opposite to the first end portion 65 is arranged, stored in the housing 1. This second one End portion 66 is formed converging, wherein the Section with the larger diameter at the first end area 65 connects. The rocker shaft 62 is at second end portion over a first, the section with arranged in the larger diameter bearings 67 in Housing 1 stored. At the section with the smaller one Diameter is the swingarm 62 at its second End region through another roller bearing 68 in the housing. 1 stored. The diameter of the first-mentioned rolling bearing 67th is obviously bigger than the diameter of the others Rolling bearing 68.

It is thus apparent that the rocker 14 is supported on the housing 1 cantilevered.

The first end 63 of this elongated trained Rocker 14 is fork-shaped, so that two forks 88, 89 are present, and it can be seen that the rocker 14 at these two fork tine 88, 89 rests on the rocker shaft 62, or on this is clamped ..

These two forks 88, 89 are relative to a longitudinal plane of symmetry 90 of the elongated rocker 14 formed symmetrically. See Figure 15. This Longitudinal symmetry plane 90 is perpendicular to the longitudinal central axis 87 of the mounted in the rocker 14 upper feed roller 8. It can be seen in particular from FIG. 4 that the swingarm made of two almost completely symmetrical mutually formed halves, which abut each other, with their planar contact area in the longitudinal direction of the rocker 14 extends. The longitudinal symmetry plane 90 coincides with this contact area together. The identifying the touch area Dividing line 92 is shown in FIGS. 13 and 16 shown.

It is thus apparent that the rocker 14 with the upper feed roller 8 mounted therein around the Shaft 62 can perform successful pivoting movements. Thus, the first, upper feed roller 8 against the second, lower feed roller 10 with the located thereon Metal band 11, which is in the direction of the arrow B (see also Fig. 10) is advanced, and against this and be moved away from it.

In the figure 2 are also the tape inlet table 70 and the ribbon outlet table 69 drawn in, on which tables the metal band 11 on both sides of the lower Feed roller 10 rests.

The rocker 14 is by a compression spring 72nd clamped against the lower feed roller 10.

The contact pressure of the compression springs 72 is by means of a threaded spindle in the threaded spindle housing 27th set.

The adjustment of the contact pressure is carried out with Help of reading the position of one on the compression spring 72 resting disc 74 on the scale 75th

The compression spring 72 is helical Thus, we have a longitudinal central axis 91, which in Figs. 13 and 16 are shown.

FIG. 13 schematically shows the rocker 14 including the above-mentioned dividing line 92. Next is the hinged at the second end 64 control rod 58 is shown with its longitudinal central axis 71. Also shown schematically is the compression spring 72nd with its longitudinal center axis 91. The longitudinal center axis 71st the control rod 58 and the longitudinal central axis 91 of the Compression spring cross the dividing line 92. It is thus it can be seen that these two longitudinal central axes 71 and 91 Determine a geometric plane with the reference number 93 is identified.

FIG. 14 schematically shows the first upper one Feed roller 8. The first, upper feed roller 8 points a longitudinal central axis 87 and is relative to the vertical to its longitudinal central axis 87 extending symmetry plane 94 formed symmetrically.

FIG. 15 shows the first end 63 of FIG Rocker 14 with the forks 88 and 89. The forks 88 and 89 are relative to the longitudinal plane of symmetry 90 of Rocker 14, in which the dividing line 92 extends, formed symmetrically.

It is thus apparent, as in FIG. 16 is shown that by the longitudinal central axes 71st and 91 certain geometric plane 93 with the plane of symmetry 94 of the upper feed roller 8 coincides.

These two levels 93 and 94 also coincide the longitudinal plane of symmetry 90 together, as in FIG. 16 is shown.

Consequently, all attack points are on the rocker 14 acting forces on a common straight line. The consequence of this is that no torsional forces act on the rocker 14, which is a Inclination of the upper feed roller 8 relative to the lower Feed roller 10 could cause. Stay that way these rollers 8 and 10 are aligned parallel to one another, allowing a precise advancement of the strip-shaped blank 11, or the metal strip is ensured.

The feed device described is to determines a ribbon-shaped blank 11, e.g. a metal band one with tools for intermittent editing fed to the belt-shaped blank equipped press.

In the figure 10, these feed device and its associated press 76, a punch press, schematically recorded.

The punch press 76 has a drive 77 on. This drive 77 can, as the expert in general is known to comprise an electric motor having a Crankshaft or a shaft with eccentric discs has. This crankshaft or eccentric disc is in Drive connection with a connecting rod 78. At this connecting rod 78, a ram 79 hinged. The ram 79 enters Upper tool 80, which consequently in the operation of the punch press 76 is moved up and down. The upper tool 80 is with Editing tools, e.g. Stamp 81 equipped. Further if the upper tool 80 is equipped with gripping pins 82, which each have a conical head section 83 exhibit.

As is well known, are in operation before impacting the processing tools, e.g. the punch 81 on the band-shaped blank 11 for the actual editing the pins 82 in pre-punched Holes in the blank 11 moves in order to precisely this Center. In this case, the upper feed roller 8 of the lower feed roller 10 for a short time by a small Strekke lifted, so no clamping force on the band-shaped Blank 11 is exercised. This position of the upper Feed roller 8 is referred to as Zwischenlüftstellung.

Further, in FIG. 10, the fixed one Lower tool 84 and the control device 85 of the punch press 76 drawn. The control device of the whole Feed device, ie for all drives thereof, is generally designated by the reference numeral 86.

It can be seen that the control devices 85, 86 of the feed device and the punch press 76 communicate with each other, since the operation of the feed device matched to the operation of the punch press 76 have to be.

In the figure 7, the positions of the schematic parts of the feed device shown shown in continuous operation. Rotate in continuous operation the first, upper feed roller 8 and the second, lower Feed roller 10, which is driven by the servomotor 2 ago are intermittent, so that the band-shaped blank 11th as is well known, progressively advanced becomes. The (electronic) control devices act here the feed device with the (electronic) Control device of the punch press 76 together, see this figure 10. The punch press 76 has a moving Upper tool 80 and a stationary lower tool 84th on. The upper tool 80 is connected to a plunger 79. The ram 79 is powered by a rotating drive 77, e.g. Electric motors and crankshaft or eccentric shaft, driven by a connecting rod 78, wherein the connecting rod 78th purely schematically the drive connection between the drive 77 and the plunger 79 represents.

Thus, the plunger is between an upper Dead center position and a bottom dead center position movable.

The thickness of the strip-shaped blank 11 and according to the distance between the first, upper Feed roller 8 and the second, lower feed roller 10th when resting on the blank, in FIG. 7 indicated by the letter E.

To a new band-shaped blank 11, ie For example, a metal band between the first, upper Insert feed roller 8 and lower feed roller 10 to be able to, the upper feed roller 8 must be raised be so that they have a given distance D from the second, lower feed roller 10, the greater than the distance E is. This distance D and the raised position of the first, upper feed roller. 8 are shown in FIG.

This position of the first, upper feed roller 8 is referred to in the art as high-lift position (Fig. 8).

To set this high-lift position the control devices 86 and 85 of the feed device and the punch press 76 is actuated such that the Plunger 79 of the punch press from the bottom dead center position is removed and that the connecting rod 45 (Fig. 2) away from the top dead center position. In which specific positions the ram 79 and the connecting rod 45 is irrelevant, as long as the Plunger is not in the bottom dead center position. General, and this is known to the skilled person, however, become the control devices 86 and 85 of the feed device and the punch press is operated such that the plunger 79 of the punch press 76 in the top dead center position located and that the connecting rod 45 in the lower Dead center position is located. The following description goes from these latter dead center positions out. Are the dead center positions reached, is the adjusting nut 39 by a corresponding rotation the threaded spindle 30 is lowered.

The bolt 43 is due to the of the Compression spring 72 via the rocker 14 and the lever devices 40 and 52 at the lower end of the slot 44 at.

By the downward movement of the Adjusting nut 30 is the first arm 41 of the first double-armed Lever 40 swung up and you second arm 42 pivoted downwards. This second arm 42 pulls the first arm 51 of the second double-armed lever device 52 also down. Thus, the second arm 54 of the second double-armed lever device 103 pivoted upwards. Consequently, the control rod assembly 57-59 lifted and thus the rocker 14 with the first, upper feed roller 8 mounted therein in the high-lift position of the first, upper feed roller 8 pivoted, in which they said the distance D of the second, lower feed roller 10, so that a new band-shaped blank 11 are inserted can.

For continuous operation, the upper feed roller must 8 rest on the band-shaped blank 11, wherein through the first, upper feed roller 8 and the second, lower feed roller 10 a clamping force for a frictional engagement be exerted on the band-shaped blank 11 got to.

This clamping force is by the compression spring 72nd generated. So the bolt 43 is not allowed on the lower one End of the slot 44 rest. This is the adjusting nut 39 by rotating the threaded spindle 30th lowered from the high ventilation position until the first, upper Feed roller 8 rests on the band-shaped blank 11. By a continued lowering movement of the adjusting nut 30, the first double-armed lever 40 is forced one To perform pivoting movement, since the rocker is not moves more because the first, upper feed roller 8 through the compression spring 72 resting on the band-shaped blank 8 is held. The said pivoting movement causes that the first arm 41 with the bolt 43 upwards pivots, so that the bolt 43 in the slot 44 between whose ends are located. That means that the connecting rod 45 basically can perform lifting movements, without that an action on the bolt 43 takes place.

Another movement during operation the feed device with the punch press is the Zwischenlüftbewegung (Figure 9).

It has been mentioned above that one Upper tool 80 a punch press with gripping pins 82 for precise positioning of the strip-shaped blank 11 equipped can be.

To enable positioning, the band-shaped blank 11 exposed during a short period of time. This means that the first, upper feed roller 8 briefly from the band-shaped blank 11 in a Zwischenlüftstellung must be lifted.

This Zwischenlüftstellung is by the Connecting rod 45 causes.

For the time being, the punch press 76 is in the stroke position driven, in which the intermediate ventilation takes place should and in which position the conical head sections 83 of the gripping pins 82 partially in the positioning holes retracted. This position can be seen in FIG.

In this position is the plunger 79 of the punch press 76 in an angular position before the bottom Dead center. Between this angular position and the bottom dead center position is thus an angular distance available.

The connecting rod 45 of the feed device is now at the same time by the actuation of its drive motor 48 in a position before its top dead center position moved up. Thus, between this angular position and the top dead center also an angular distance available.

The one mentioned in connection with the punch press Angular distance is equal to that of the feed device existing angular distance.

Now, the adjusting nut 39 by rotating the threaded spindle 30 moves downwards. This comes the bolt 43 for engagement with the lower end of the slot 44. The adjusting nut 57 is then further down moves, so that due to the now occurring pivoting movements the lever devices and the rocker 14 the first, Upper feed roller 8 releases the band-shaped blank. In this released state of the band-shaped Blank manually detectable loose. This position of Adjusting nut 39 is together with the relevant angular positions stored in the control devices 85 and 86.

This means that in continuous continuous operation the connecting rod 45 with the slot 44 relative to Bolt 43 can move freely without the bolt affected is, with the exception that if the connecting rod 45 the above-mentioned angular position before the top dead center position of the connecting rod reaches 45, the lower end of the Langloches 44 the bolt 43 grips, lifts him and after passing through the top dead center position is, the pin 43 is released again.

Characterized in that the rocker 14 one-sided, boom-shaped can be arranged through two of the described Feeders a twin feed device build by using two such feeders arranged facing each other with respect to the feed rollers become.

A first embodiment of a twin feed device is shown in FIG.

The structure of the two individual feeders is the same as the previous figures, in particular the feed device described in FIG. 1, wherein corresponding units of construction in the figure 11 left feed device with the letter A, and the right-hand feed device identified with the letter B.

With this twin feed device can now two band-shaped blanks (11A, 11B, so for example metal bands be advanced. The two metal bands can thus be advanced completely independently of each other become. Further, these metal bands 11A, 11B with respect to on the thickness, the width, feed length and also the Material completely different. Obviously it is also possible to work with just one metal band on both sides of the feed rollers of both individual Feed devices is taken.

FIG. 12 shows an embodiment of a Twin feed device designed for extreme bandwidths is used. Again, those corresponding to the figure 1 Units identified with the letters A and B.

The wide metal band 11 is at both Longitudinal edges by the corresponding feed rollers of seized feed devices arranged facing each other, which feeders obviously synchronous work.

Claims (16)

Feed device for intermittently feeding a strip-shaped blank (11, 11A, 11B) to a press equipped with tools (80, 84) for intermittently processing the strip-shaped blank (11, 11A, 11B), which feed device comprises a housing (1), a first (11) 8) and a second feed roller (10), which feed rollers (8; 10) are arranged for receiving a strip-shaped blank (11; 11A; 11B) arranged therebetween, a first intermittently operating electric servomotor (2; 2A; 2B ), which is drive-connected with at least the first feed roller (8), which first feed roller (8) has a longitudinal center axis (87) and symmetrical relative to a plane of symmetry (94) perpendicular to its longitudinal central axis (87), further an elongate Rocker (14) having a first (63) and a second, the first opposite end (64), in which rocker (14) the first e feed roller (8) is rotatably mounted, which second feed roller (10) is arranged on a roller shaft (9) and rigidly connected to the same, which rocker (14) at its first end (63) on a first end portion (65) of a rocker shaft (62) is arranged and rigidly connected to the same, which rocker shaft (62) at a second, the first (65) opposite end portion (66) in the housing (1; 1A; 1B) so that the rocker arm (14) is cantilevered, having a feed roller lifter including a control rod (58) hinged to the second end (64) of the rocker arm (14), which control rod (58 ) has a longitudinal central axis (71), further comprising a Vorschubwalzenanpressvorrichtung containing a helical compression spring (72) which rests at one end on the rocker (14), which helical compression spring (72) has a further longitudinal central axis (91), characterized in that the control rod (58) articulated on the rocker (14), the compression spring (72) resting on the rocker (14) and the first feed roller (8) are arranged relative to one another such that the longitudinal central axis (71) of the control rod (58 ) and the longitudinal center axis (91) of the compression spring (72) define a geometric plane (93) which coincides with the plane of symmetry (94) of the first feed roller (8). An advancing device according to claim 1, characterized in that the first end (63) of the elongate rocker (14) is fork-shaped with two forks (88; 89), which fork tines (88; 89) relative to a longitudinal plane of symmetry (90) of the elongated rocker (14) are formed symmetrically, and that the elongate rocker (14) relative to the control rod (58), the compression spring (72) and the first feed roller (8) is arranged such that its longitudinal plane of symmetry (90) also with the plane of symmetry (94) of the first feed roller (8) coincident geometric plane (93) coincides. Feed device according to Claim 1, characterized by a threaded spindle housing (27) arranged on the housing (1; 1A; 1B), by a motor (28), by a threaded spindle (30) and a control device (29) on which threaded spindle (30). an adjusting nut (39) arranged and by a rotation of the threaded spindle (30) along the same is movable, by a driven by a drive motor (48) eccentric disc (46) on which a connecting rod (45) is mounted, which in the eccentric ( 46) has an at least approximately parallel to the threaded spindle (30) extending slot (44), by a first (40) on the adjusting nut (30) mounted double-armed lever device and a second, on a threaded spindle housing (27) carried wave ( 53) mounted double-armed lever device (52), which first two-armed lever device (39) has a first (41), in engagement with the connecting rod (45) and a second arm (42) which is articulated on a tab (50), which in turn is articulated on a first arm (51) of the second double-armed lever device (52), on whose second arm (54) a control rod arrangement (57-59) is articulated, which on the rocker ( 14) is articulated, and by a between the rocker (14) and the threaded spindle housing (27) arranged compression spring (72), which the rocker (14) with the superposed shaft (7) with the first upper feed roller (8) against the Sub-shaft (9) with the second lower feed roller (10) presses. Feed device according to claim 3, characterized in that the threaded spindle (27) via rolling bearings (37; 38) without play in the threaded spindle housing (27) and the housing (1; 1A, 1B) is mounted, so that the threaded spindle (27) is precisely positioned , Feed device according to Claim 4, characterized by an adjusting motor (28) having a drive shaft (31) which is drive-connected to the threaded spindle (27) via a multi-part clamping sleeve (32, 33, 34), followed by a dog clutch (36). Feed device according to claim 3, characterized in that the second arm (54) of the second double-armed lever device (52) is articulated via a ball and socket connection to a part (57) of a control rod (58) forming a control rod arrangement (57-59). Feed device according to claim 6, characterized in that the shaft (53) by means of sealing rings (55, 56) relative to the threaded spindle housing (27) is sealed oil-tight, so that the threaded spindle housing (27) forms a closed oil chamber. Feed device according to claim 7, characterized in that the control rod arrangement (57-59) for length adjustment has screwed together rod sections. Feed device according to claim 3, characterized in that the first arm (41) of the first double-armed lever device (40) via a slot (44) passing through bolt (43) in engagement with the connecting rod (45). Feed device according to claim 1, characterized in that the second end region (66) of the rocker shaft (62) is formed convergent and has a first, the first end portion (65) facing and a second, remote from the first end portion, which first portion a larger Diameter than the second portion and the first portion via a first (67) and the second portion via a second rolling bearing (68) is mounted in the housing. Feed device according to claim 2, characterized in that the rocker (14) at its fork tines (88; 89) are connected by means of a clamping connection with the first end portion (65) of the rocker shaft (62), to which each fork tines (88, 89) a slotted End portion which is penetrated by a threaded bolt (97, 98). Twin feed device, characterized by two devices according to claim 1, which devices are arranged with their feed rollers (8; 10) facing each other. A method of operating the feeding device according to claim 1, wherein the feeding device comprises a threaded spindle housing (27) disposed on the housing (1; 1A; 1B), a motor (28) having a threaded spindle (30) and a control device (29) which threaded spindle (30) has an adjusting nut (39) and is movable along the same by rotating the threaded spindle (30), further comprises an eccentric disc (46) driven by a drive motor (48) on which a connecting rod (45) is mounted, the at the end of the eccentric disc (46) distal end at least approximately parallel to the threaded spindle (30) extending slot (44) further comprises a first (40), on the adjusting nut (39) mounted double-armed lever device and a second, on a threaded spindle housing (27) carried shaft (53) mounted double-armed lever device (52), which first double-armed lever device (39) has a first (41), in engagement with the P leuel (45) and having a second arm (42) hinged to a tab (50) which in turn is hinged to a first arm (51) of the second double-armed lever (52), - to the second arm (54 ) a control rod assembly (57-59) is hinged, which is hinged to the rocker (14), a between the rocker (14) and the threaded spindle housing (27) arranged compression spring (72) which the rocker (14) with the therein mounted upper shaft (7) with the first upper feed roller (8) against the lower shaft (9) with the second lower feed roller (10) presses, and wherein the feed device comprises a control device (86) and cooperates with a press (76), the a moving upper tool (80) and a fixed lower tool (84), which upper tool (80) is connected to a movable between a top dead center position and a bottom dead center position plunger (79), and a control device (85) which is in communication with the control device (86) of the advancing device, and in which the long hole (44) of the connecting rod (45) movable between a dead center position and a bottom dead center position has an upper end having a lower end, the first arm (41). the first double-armed lever device (40) via a the slot (44) passing through the bolt (43) in engagement with the connecting rod (45), wherein for inserting a new band-shaped blank (11; 11A; 11B) between the upper feed roller (8) and the lower feed roller (10), the upper feed roller (8) is moved to a high-lift position, in this position a predetermined distance (D) between the upper feed roller (8) and the lower feed roller ( 10), characterized in that for adjusting the high-lift position of the upper feed roller (8) said two control devices (85; 86) are controlled such that the plunger (79) in its top dead center position and the connecting rod (45) in its lower Dead center position is controlled. A method according to claim 13, characterized in that at fixed plunger (79) and fixed connecting rod (45), the adjusting nut (39) is lowered by rotating the threaded spindle (30), wherein the bolt (43) due to the of the compression spring (72 ) acting on the rocker (14) and the lever devices (40; 41, 42 and 51; 52, 534) force at the lower end of the elongated hole (44), whereby the first arm (41) of the first double-armed lever device (40 41, 42) and its second arm (42) is pivoted downward, the first arm (51) of the second double-armed lever device (51; 52, 54) is pivoted downward, thus the control rod assembly (57-59) due to this Swinging movements lifted and thus the rocker (14) is pivoted with the upper feed roller (8) mounted therein in the high-lift position of the upper feed roller (8). A method of operating the scrolling apparatus according to claim 1, wherein the feeding device comprises a threaded spindle housing (27) disposed on the housing (1; 1A; 1B), a motor (28) having a threaded spindle (30), and a control device (29) which threaded spindle (30) an adjusting nut (39) arranged and also a rotation of the threaded spindle (30) along the same is movable, further with a drive motor (48) driven eccentric disc (46) on which a connecting rod (45) is mounted, the at the end of the eccentric disc (46) distal end at least approximately parallel to the threaded spindle (36) extending slot (44) further comprises a first (40) on the adjusting nut (39) mounted double-armed lever device with a second, on a threaded spindle housing (27) mounted shaft mounted double-armed lever device (53), which first double-armed lever device (39) has a first (41), in engagement with the connecting rod (45) standing and a second arm (42) which is hinged to a tab (50), which in turn is articulated to a first arm (51) of the second double-armed lever device (52) on the second arm (54) a Control rod assembly (57-59) is hinged, which is hinged to the rocker (14), a between the rocker (14) and the threaded spindle housing (27) arranged compression spring (72) which the rocker (14) with the mounted therein harmonic (7) presses with the upper feed roller (8) against the lower shaft (9) with the lower feed roller (10), and in which the feed device comprises a control device (86) and cooperates with a press (76) which is a moving upper tool ( 80) and a fixed lower tool (84), which upper tool (80) is connected to a movable between a top dead center position and a bottom dead center position ram (79), and having a press control device (85) which is connected to the control device (86) of the advancing device, and in which the slot (44) of the between a top dead center and a bottom dead center movable connecting rod (45) has an upper and a lower end, the first arm (45) of the first characterized in that the connecting rod (45) is moved to a position remote from its top dead center position, the adjusting nut (40) via a bolt (43) passing through the slot (44) in engagement with the connecting rod (45). 39) is displaced downward by rotating the threaded spindle (30) until the upper feed roller (8), due to the pressure exerted on the rocker (33) by the compression spring (72), on the strip-shaped blank (11; 11A; 11B) rests in which position the bolt (43) from both ends of the slot (44) has a distance, so that lifting movements of the connecting rod (45) are possible with a fixed bolt (43). A method of operating the feeding device according to claim 1, wherein the feeding device comprises a threaded spindle housing (27) arranged on the housing (1; 1A; 1B), a motor (28) and a threaded spindle (30) and a control device (29) which threaded spindle (30) has an adjusting nut (39) and is movable along the same by rotating the threaded spindle (30), further comprises an eccentric disc (46) driven by a drive motor (48) on which a connecting rod (45) is mounted, the at the front of the eccentric disc (46) distal end at least approximately parallel to the threaded spindle (30) extending slot (44) further comprises a first (40) mounted on the adjusting double-armed lever device and a second, on a threaded spindle housing (27) supported shaft (53) mounted double-armed lever device (52), which first double-armed lever device (39) has a first (41), in engagement and the connecting rod (45) standing and a second arm (42) which is hinged to a tab (50), which in turn is articulated to a first arm (51) of the second double-armed lever device (52) on the second arm (54) a Control rod assembly (57-59) is hinged, which is hinged to the rocker (14), a between the rocker (14) and the threaded spindle housing (27) arranged compression spring (72) which the rocker (14) with the mounted therein harmonic (7) with the first upper feed roller (8) against the lower shaft (9) with the second lower feed roller (10) presses, and wherein the feed device comprises a control device (86) and cooperates with a press (76), which is a moving Upper tool (80) and a fixed lower tool (84) with a movable between a top dead center and a bottom dead center position plunger (79) is connected, and having a press control device (85) connected to the Steuervorricht and the longitudinal hole (44) of the connecting rod (45) movable between a top dead center position and a bottom dead center position has upper and lower ends, the first arm (41) of the first double-armed lever device (40) via a the slot (44) passing through bolt (43) in engagement with the connecting rod (45), which plunger (79) by a rotating drive (77) is driven and the eccentric disc (46) of the connecting rod (45) driven by a drive motor (48), which upper tool (80) has catching pins (82, 83) for precisely positioning the band-shaped blank (11, 11A, 11B) in the press (76) during the machining process thereof, which catch pins (82, 82; 83) in pre-punched positioning holes in the band-shaped blank (11; 11A; 11B) and which locating pins (82, 83) have a conical head portion (83), the first upper feed roller (8) then being moved away from the second lower feed roller (10) to an intermediate release position when the conical head portions (83) have been partially retracted into the positioning holes and thereafter set down again on the blank (11; 11A; 11B) when the conical head portions (83) have been partially dug out of the position holes, characterized in that for adjustment of the intermediate release position of the Plunger (79) is brought by its rotating drive (77) in an angular position before its bottom dead center, in which angular position, the conical head portions (83) of the gripping pins (82; 83) only partially project into the positioning holes, in which state the eccentric ( 46) of the connecting rod (45) assumes an angular position before the top dead center position, wherein the angular distance of the ram els (79) between said angular position and the bottom dead center position equal to the angular distance of the eccentric disc (46) between its angular position and the top dead center is that after the adjusting nut (39) is moved downward, so that the bolt (43) Appendix comes to the lower end of the slot (44) and the adjusting nut (89) is moved even further down until the strip-shaped blank (11; 11A; 11B) is loose due to the lifting of the first upper feed roller (8) due to the movement transmitted via the lever means (40; 41; 42 and 45; 52; 54) and the control rod assembly (57-59) and rocker (14); the reached position of the adjusting nut (39) for said angular position of the eccentric disc (46) and the corresponding angular position of the plunger (79) in the corresponding control devices (85; 86) are stored.

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