EP1380366A1 - Feeding device for intermittently feeding a band material to a press and method for operating such a device - Google Patents

Abstract

A rocker (33) supports an upper feeding roller (10) which cooperates with a lower feeding roller (22) for feeding a strip shaped blank (7). A pressure spring (84) is arranged between the rocker and the housing of a threaded spindle (50). The pressure springs press the rocker with an upper shaft (69), on which the upper feeding roller is supported, onto a lower shaft (73) with lower feeding roller. The apparatus includes two double arm levers (93), each having two arms (94,95). An adjusting nut (57) is arranged on the threaded spindle and supports first double arm lever. The second double arm lever is pivotally mounted at its arm (94) through a connecting strip to the arm (95) of first double arm unit. The arm (95) of second double arm unit is pivotally mounted through a control rod (71) to the rocker (33). The arm (94) of the first double arm unit supports a bolt which projects into the elongated hole (59) of an eccentrically supported rod (96). An Independent claim is also included for a method of operating a feeding apparatus.

Description

The present invention relates to a feed device for the intermittent feeding of a band-shaped blank to one with tools for intermittent Machining of the band-shaped blank equipped Press which feed device is a housing and a threaded spindle housing arranged on the housing, an upper feed roller arranged on a harmonic shaft and a lower one arranged on a lower shaft Has feed roller, which determines feed rollers are the blank to be fed by a double-sided To seize clamps and through an intermittent Intermittently advance rotational movement of what waves at least one with an intermittent working electric servo motor is connected to the drive and the harmonic in a via a rocker shaft on Housing hinged rocker is mounted, by means of which it can be moved against and away from the sub-wave is.

The invention further relates to a method to operate the feed device mentioned at the beginning, which feed device has a control device and cooperates with a press that is moving Has upper tool and a fixed lower tool, which top tool with a between an upper one Dead center position and a bottom dead center position movable plunger is connected, and the one press control has that with the control device of the Feed device is connected, and which the slot of the between an upper dead center position and a lower dead center movable connecting rod has the upper and a lower end, the first arm of the second double-armed lever device via an elongated hole penetrating bolt in engagement with the connecting rod stands, whereby for the insertion of a new ribbon-shaped blank between the upper feed roller and the lower one Feed roller the upper feed roller in a high-vent position is driven to a predetermined in this position Distance between the upper feed roller and the lower feed roller.

The invention further relates to a method to operate the feed device of the aforementioned Type in which the feed device is a control device and cooperates with a press, which is a moving upper tool and a fixed lower tool has, which upper tool with a between an upper dead center position and a lower one Dead center position movable plunger is connected, and which has a press control device which with the Control device of the feed device in connection stands, and in which the elongated hole between one top dead center position and a bottom dead center position movable connecting rods an upper and a lower end has, the first arm of a first double-armed lever device via a bolt penetrating the elongated hole is engaged.

Another object of the invention is a feed device of the type mentioned at the beginning, which has a control device with a threaded spindle, on which an adjusting nut is arranged and by rotating the threaded spindle along the same is movable, the one driven by a drive motor Has eccentric disc, on which one between one top dead center position and a bottom dead center position movable connecting rod is arranged, which at his at least one end away from the eccentric disk Elongated hole running almost parallel to the threaded spindle has a first, mounted on the adjusting nut double-armed lever device and a second, on a shaft mounted in the threaded spindle housing has double-armed lever device, which first double-armed Lever device a first, engaged with the connecting rod and has a second arm that is hinged to a tab, which in turn is attached to one articulated first arm of the second double-armed lever device is on the second arm a control rod assembly is articulated, which is articulated on the rocker and one between the rocker and the lead screw housing arranged compression spring assembly, which the rocker with the harmonic stored in it the upper feed roller against the lower shaft with the lower Press feed roller.

The invention further relates to a method to operate the feed device of the aforementioned Type in which the feed device is a control device and cooperates with a press, which is a moving upper tool and a fixed lower tool has, which upper tool with a between an upper dead center position and a lower one Dead center position movable plunger is connected, and which has a press control that with the control device the feed device is connected, and in which the elongated hole between an upper Dead center position and a lower dead center position movable Connecting rods have an upper and a lower end, the first arm of the first double-armed lever device engages via a bolt penetrating the elongated hole stands with the connecting rod, being used to insert a new one ribbon-shaped blank between the upper and the lower Feed roller the upper feed roller in a high-vent position is driven to a predetermined in this position Distance between the upper feed roller and the lower feed roller.

The invention also relates to a method for Operation of the feed device of the aforementioned Type in which the feed device is a control device and cooperates with a press that a moving upper tool and a fixed lower tool has, which upper tool with a between an upper dead center position and a lower one Dead center position movable plunger is connected, and which has a press control device which with the Control device of the feed device in connection stands, and in which the elongated hole between one top dead center position and a bottom dead center position movable connecting rods an upper and a lower end has, the first arm of the first double-armed lever device via a bolt penetrating the slot is in engagement with the connecting rod, the band-shaped Blank has a predetermined thickness and one Distance between the upper feed roller and the lower feed roller is set to intermittent Push the ribbon-shaped blank through these rollers apply a predetermined clamping force to the same is exercised.

The invention also relates to a method for Operation of the feed device of the aforementioned Type in which the feed device is a control device and cooperates with a press that a moving upper tool and a fixed lower tool has, which upper tool with a between an upper dead center position and a lower one Dead center position movable plunger is connected, and which has a press control that with the control device the feed device is connected, and in which the slot of the between an upper Dead center position and a lower dead center position movable Connecting rods have an upper and a lower end, the first arm a first double-armed lever device via a bolt penetrating the elongated hole in The connecting rod is engaged, which tappet from one rotating drive is driven and the eccentric of the connecting rod is driven by a drive motor which Upper tool catch pins for precise positioning of the band-shaped blank in the press during the machining process same, which catch pins in pre-punched positioning holes in the band-shaped blank are moved in, which catch pins a conical Have head section, the upper feed roller then away from the lower feed roller to an intermediate fan position is moved upward when the conical Head sections partially inserted into the positioning holes have been placed on the blank will when the tapered head sections partially has been excavated from the position holes.

The presses mentioned here are special high-speed presses with stroke rates up to 2000 Strokes / minute. These presses are with tools for machining one (or more) fed band-shaped Blanks equipped, whereby punching, embossing, Bending work, riveting, making threads, etc. are carried out.

The movement of the ribbon-shaped blank, the edited in the press, takes place intermittently, so gradually. During a processing step, e.g. a punching, obviously there is no Forward movement of the band-shaped blank. He often does precisely positioned by the catch pins arranged in the tools, so locked. After finishing the processing step, after, for example, a punch has been moved out of the punched hole is the band-shaped blank by a predetermined Line advanced and stopped again so that the next processing step can.

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

These feeders usually have Feed links to advance the ribbon-shaped blank. This is clamped by the feed links and moved forward. If the feed links again return to their starting position, the clamping canceled. The clamping is additionally during that period of time, during which the tools on the strip-shaped blank one processing step perform, especially in the case of lanyards.

There are versions of such feeders become known in which the clamping members are designed as linearly moving clamps. Other designs have oscillating, rotary movements executing segment rollers.

Also are feeders with electrical Servomotors become known. There is a first servo motor the feed operation of the clamping members and another, second servo motor for intermittent take off assigned a clamping member or ribbon-shaped blank. Such servomotors are manufactured by several companies and sold. The operation of these servo motors is electronically controlled. These new feeders show completely cylindrical, as feed links Shafts arranged feed rollers that are intermittent always rotate in the same direction. From these feed rollers is one in one with the other servo motor component connected to the drive, due to its operation this feed roller against the band-shaped blank to clamp it and move it away for release becomes.

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

It is therefore an object of the present invention an apparatus for intermittently feeding a to create ribbon-shaped blanks that have a minimum of Moving parts, with those parts that are high Accelerations and decelerations, have the smallest possible masses and no drive motors are available that work oscillating.

Another goal is a device too create where the frame is a lead screw housing has, in which the threaded spindle is arranged is which threaded spindle is rigid with a sleeve part is connected, which is free of play in the threaded spindle housing via roller bearings is mounted so that the threaded spindle is supported without play in the threaded spindle housing.

Yet another object of the invention is one Show device in which the with the threaded spindle rigidly connected sleeve part of a multi-part Clamping sleeve is in which the drive shaft is further Servo motor protrudes so that the drive shaft further servo motor with the threaded spindle is connected with what when mounting the further Servo motor by connecting its drive shaft to the threaded spindle over the adapter sleeve the final position of the servo motor by the in the threaded spindle housing precisely positioned threaded spindle is determined.

It is an object of the invention to provide a feed device to create a motor with a lead screw and has a control device on which Threaded spindle arranged an adjusting nut and by rotating the threaded spindle along the same is movable, an eccentric disc driven by a drive motor has, on which a connecting rod is mounted is the one at the end distant from the eccentric disc at least approximately parallel to the threaded spindle Has elongated hole, a first, on the adjusting nut stored double-armed lever device and one second one, carried in a threaded spindle housing Has shaft mounted double-armed lever device, which first double-armed lever device of a first standing in the conrod with the connecting rod and a second Has arm that is hinged to a tab, which in turn on a first arm the second double-armed Lever device is articulated, on the second arm one Control rod assembly is articulated, which on the Swing arm is hinged, and one between the swing arm and the threaded spindle housing arranged compression spring assembly which has the rocker with the mounted therein Harmonic shaft with the upper feed roller against the Press the lower shaft with the lower feed roller.

It is also another goal of the present Invention a method for operating the aforementioned To show feed device, in which to Setting the ventilation position of the upper feed roller the aforementioned two control devices are controlled in this way the ram is in its bottom dead center position and the connecting rod is moved to its top dead center position becomes.

Another object of the invention is also a Procedure for adjusting the upper air position To show feed roller, which with the fixed Conrod the adjusting nut by rotating the threaded spindle is lowered until the bolt at the bottom of the elongated hole, with which the first arm of the first double-armed lever device pivoted down and whose second arm is pivoted up, consequently the control rod arrangement lifted up and thus the swingarm with the the upper roller stored in it in the raised position of the upper feed roller is pivoted.

Yet another object of the invention is a Method for operating the feed device mentioned at the beginning to create, in which the connecting rod in its lower Dead center position is moved, the adjusting nut shifted downwards by rotating the threaded spindle until the upper feed roller due to the by the Pressure springs exerted pressure on the rocker band-shaped blank rests, and then the adjusting nut is pushed further down until the bolt of has a distance between both ends of the elongated hole, so that the connecting rod's stroke movements when the bolt is stationary are possible.

Yet another object of the invention is a Method for operating the feed device of the beginning to create the type mentioned, in which to hire the intermediate air position of the plunger through its rotating drive in an angular position in front of its lower Dead center position is brought in what angular position the tapered head portions of the catch pins only partially protrude into the positioning holes, and the Eccentric disc of the connecting rod in an angular position the top dead center is brought, the angular distance of the ram between the mentioned angular position and the bottom dead center position equal to the angular distance the eccentric disc between their named Angle position and the top dead center position is afterwards the threaded nut is moved down until the band-shaped blank due to the lifting of the upper feed roller is loose, and that the position of the adjusting nut for the specified angular position of the eccentric disc and the corresponding angular position of the ram in the corresponding control devices are stored.

Due to the formation of the adapter sleeve, the is an integral part of the threaded spindle, there is Freedom to choose different servo motors and to assemble, and in particular standardized standard motors, since there are no specially designed drive shafts Servomotors are necessary.

The feed device must be designed basically perform 3 main functions, namely the Ventilation (insert tape), the tape thickness setting (the upper roller lies on the belt, play in the slot connecting rod) and intermediate ventilation (belt ventilation before each Punching process).

Figur 1 einen Schnitt durch eine erste Ausführung der erfindungsgemässen Vorrichtung;

Figur 2 einen Teil in Figur 1, in einem vergrösserten Massstab gezeichnet;

Figur 3 die ersten und zweiten Abschnitte der Oberwelle und der Unterwelle sowie der oberen und unteren Vorschubwalze in einer axial auseinandergezogenen Darstellung;

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

Figur 5 einen Schnitt entlang der Linie V-V der Figur 1;

Figur 6 einen Schnitt entlang der Linie VI-VI der Figur 1;

Figur 7 einen Schnitt durch einen Teil der Vorrichtung, bei dem der Servomotor mit dem Antriebszahnrad und der Kreuzscheibe der Oldham-Kupplung demontiert dargestellt sind;

Figur 7a den Flansch des Servomotors mit montierten Antriebszahnrad und einem Teil der Oldham-Kupplung;

Figur 7b die Kreuzscheibe der Oldham-Kupplung,

Figur 8 einen Schnitt durch eine weitere Ausführung der erfindungsgemässen Vorrichtung,

Figur 9 einen Schnitt durch einen Teil der in der Figur 8 gezeigten Vorrichtung, bei der der Antrieb für die Unterwalze demontiert ist;

Figur 9a den demontierten Antrieb für die Unterwalze der in den Figuren 8 und 9 gezeigten Ausführung;

Figur 10 vereinfacht die in der Figur 6 gezeigten Darstellung, wobei die Vorschubvorrichtung in der Vorschubstellung während dem Dauerbetrieb ohne Zwischenlüftung gezeigt ist;

Figur 11 vereinfacht die in der Figur 6 gezeigte Darstellung, in der die Vorschubvorrichtung in der Hochlüftstellung gezeigt ist;

Figur 12 vereinfacht die in der Figur 6 gezeigte Darstellung, wobei die Vorschubvorrichtung in der Zwischenlüftstellung gezeigt ist; und

Figur 13 schematisch die mit einer Stanzpresse zusammenwirkenden Vorschubvorrichtung gemäss der vorliegenden Erfindung.

The subject matter of the invention is explained in more detail below with reference to drawings showing exemplary embodiments. It shows:

1 shows a section through a first embodiment of the device according to the invention;

Figure 2 shows a part in Figure 1, drawn to an enlarged scale;

Figure 3 shows the first and second sections of the upper shaft and the lower shaft and the upper and lower feed roller in an axially exploded view;

Figure 4 shows a section along the line IV-IV of Figure 1;

5 shows a section along the line VV of Figure 1;

6 shows a section along the line VI-VI of Figure 1;

FIG. 7 shows a section through part of the device in which the servomotor with the drive gear and the cross disk of the Oldham coupling are shown disassembled;

Figure 7a shows the flange of the servo motor with the drive gear fitted and part of the Oldham coupling;

FIG. 7b the cross disk of the Oldham coupling,

FIG. 8 shows a section through a further embodiment of the device according to the invention,

FIG. 9 shows a section through part of the device shown in FIG. 8, in which the drive for the lower roller has been removed;

Figure 9a shows the dismantled drive for the lower roller of the embodiment shown in Figures 8 and 9;

FIG. 10 simplifies the illustration shown in FIG. 6, the feed device being shown in the feed position during continuous operation without intermediate ventilation;

FIG. 11 simplifies the illustration shown in FIG. 6, in which the feed device is shown in the raised position;

FIG. 12 simplifies the illustration shown in FIG. 6, the feed device being shown in the intermediate ventilation position; and

FIG. 13 schematically shows the feed device interacting with a punch press according to the present invention.

The device has a housing 1. On first servo motor 2, of which the electronic one is simplified Control 3 is indicated, is with its flange 4 flanged to housing 1 via screw bolts 5.

This first servo motor 2 is known per se Controlled in such a way that it is gradually intermittent Executes rotary movements. The duration and that The extent of each step of the rotary movement depending on the in the downstream press controlled processing to be performed. This servo motor 2 has a drive shaft 6.

In the housing 1, the harmonic 8, 9 with the upper feed roller 10 and the lower shaft 20, 21 with the arranged lower feed roller 22, which is to be fed band-shaped blank 7 usually a metal band, advance intermittently.

The harmonic is in an axial servo motor side first shaft section 8 and one in one axial distance from this first shaft section 8 split second shaft section 9 remote from the servo motor. Between these shaft sections 8, 9 is one upper feed roller 10 held clamped.

The second shaft section 9 remote from the servo motor is of a clamping screw 11 supported on it axially interspersed with the servo motor side, first Shaft section 8 is in screw engagement.

By this clamping screw 11 are the two Shaft sections 8, 9 clamped against each other, so that the arranged between these shaft sections 8, 9 upper Feed roller 10 is held clamped.

This upper feed roller 10, which consists of several Parts exists and is very light, shows Shape of a hollow circular cylinder with an axial interior 12 with an inner peripheral wall 13 and two end face portions 14 and 15. See Figure 3.

The transition area 16 between the end surface portion 14 and the inner peripheral wall 13 of the interior 12 has the shape of a truncated cone. Similarly, the transition region 17 between the End face portion 15 and the inner peripheral wall 13 of the Interior 12 in the form of a truncated cone.

The facing ends of the shaft sections 8, 9 also have a frustoconical shape Section 18 and 19 respectively.

It can thus be seen that after the Tightening the clamping screw 11 corresponding to each other frustoconical sections 16, 18 and 17, 19 abut each other so that the one in between upper feed roller 10 is clamped and kept guided.

It can also be seen that to remove the upper feed roller 10 only the clamping screw 11 released and through an opening in the housing 1, through which the clamping screw 11 is accessible, be pulled away got to. Then the feed roller can be easily removed become.

This state is purely related, for example with the lower shaft sections to be described later 20, 21 and the lower feed roller 22 in shown in Figure 3. The axial distances to which are still shown are exaggeratedly large.

The sub-wave 20, 21 is also in one axially servo motor side, first shaft section 20 and one at an axial distance from this first shaft section 20 arranged second servo-remote shaft section 21 divided. Between these wave sections 20, 21, the lower feed roller 22 is clamped held.

The second shaft section remote from the servo motor 21 is of a tensioning screw supported on it 23 axially interspersed with the servo motor side, first Shaft section 20 is in screw engagement.

By this clamping screw 23 are the two Shaft sections 21, 22 clamped against each other, so that that arranged between these shaft sections 21, 22 lower feed roller 22 is held clamped.

This lower feed roller 22, which consists of several Parts exists and is very light, shows Shape of a hollow circular cylinder with an axial interior 24 with an inner peripheral wall 25 and two end face portions 26 and 27 on.

The transition area 28 between the end surface portion 26 and the inner peripheral wall 25 of the interior 24 has the shape of a truncated cone. Likewise, the transition area 29 between the End face portion 27 and the inner peripheral wall 25 of the Interior 24 in the form of a truncated cone.

The facing ends of the shaft sections 20, 21 also have a frustoconical shape Section 30 and 31 respectively.

It can thus be seen that after the Tightening the clamping screw 23 corresponding to each other frustoconical sections 28, 30 and 29, 31 abut each other so that the one in between lower feed roller 22 clamped and held out is.

It can also be seen that to remove the lower feed roller .22 only the clamping screw 23 released and through an opening in the housing 1, through which the clamping screw 23 is accessible, be pulled away got to. Then the feed roller 22 can easily get extended.

This state is shown in FIG. 3.

The servo motor side, first section 8 of the Harmonic and the servo motor-side first section 20 the sub-wave remain in place, such as in the figure 2 is shown. So you will not be moved. The second section 9 of the harmonic remote from the servo motor and the second section 21 of the sub-shaft remote from the servomotor are in the direction with loosened clamping screws 11, 23 the arrow C has been axially shifted. With that lie the Feed rollers 10, 22 free and can be removed from the shafts become. It should be noted that in FIG. 3 the axial distances between the components are exaggerated are. The free space between the respective sections that means their distance must only be so large be that the rollers for removal in the radial direction can be moved freely.

Reference is now made to FIGS. 8 and 10. The first section 8 of the harmonic on the servo motor side is a roller bearing 32 in a to be described Rocker 33, i.e. the swing section 33a stored. The lubricant space of the roller bearing 32 is by means of Seals 34a, 34b sealed.

The second section 9 of the servomotor Harmonic is via roller bearings 35 in the rocker section 33b stored. The lubricant chamber of the roller bearing 35 is by means of Seals 36a, 36b sealed.

The servo motor side, first section 20 of the The lower shaft is mounted in the housing 1 via a roller bearing 36. The lubricant chamber of the roller bearing 36 is by means of a seal 37 sealed.

The second section 21 of the servomotor The lower shaft is mounted in the housing 1 via roller bearings 38 and 92. The lubricant chamber of the roller bearing 38 is by means of Seals 39a, 39b sealed.

So it can be seen that all the bearings of the shaft sections 8, 9, 20, 21 each in its own Lubricant or lubricating oil chambers are arranged and thus the removal of the feed rollers mentioned above 10.22 without any opening of lubricant chambers is feasible. This is the corresponding roll change the feed rollers 10, 22, very easy to perform.

According to a first preferred embodiment is the harmonic stored in the rocker 33, the means exactly that which is mounted in the rocker section 33a servo motor side, first shaft section 8 of the harmonic in drive connection with the first servo motor 1.

The first shaft section 8 is with a Oldham coupling 40 connected, of which in Fig. 7b the cross disk 41 is shown separately. This Oldham clutch 40 is necessary because the first wave section 8 (and obviously all related to it Parts of the device) transverse movements relative to the stationary Performs drive shaft 6 of the servo motor 2.

This Oldham coupling 40 is from an upper one Spur gear 42 followed that with a lower spur gear 43 combs, which with the servo motor side, first Shaft section 20 of the sub-wave is connected.

The connection of the upper spur gear 42 with the drive shaft 6 of the servo motor 2 by a multi-part adapter sleeve with a first adapter sleeve part 44 and a second adapter sleeve part 45.

The interaction of the clamping sleeve parts 44, 45 takes place by means of ring clamping elements 46. The clamping screws are shown with the reference number 47.

The upper spur gear 42 is integral with the second adapter sleeve part 45, with which one considerable savings in moving masses is achieved.

As a preferred version, the servo motor is close Part of the Oldham coupling also in one piece the second adapter sleeve part 45 is formed.

According to a further preferred embodiment there are no spur gears, so the lower one Feed roller 22 only by frictional engagement with the metal belt 7 is rotated.

A still further preferred embodiment is in of Figures 8, 9, 9a. In this version the top roller 10 is frictionally engaged with the metal belt rotates.

This version is the servo motor side second shaft section 20 of the sub-shaft from the servo motor 2 driven. This wave section is 20 formed in one piece with the second adapter sleeve part 45, so that there is again a minimal rotating mass.

On a threaded spindle housing 67 is a further servo motor 48 arranged. Its electronic Control, i.e. the housing of which is indicated at 49.

This servo motor 48 is used to drive one Threaded spindle 50.

The servo motor 48 is only one example to consider the drive of the threaded spindle 50. There can also be 48 different drives from the servo motor to be available. The drive shaft of the servo motor 48 is indicated with the reference number 51. The connection between the drive shaft 51 of the servo motor 48 and the threaded spindle 50 takes place by means of a multi-part adapter sleeve, a first clamping sleeve part 52, a second Has clamping sleeve part 53 and ring clamping elements 54. The Collet parts 52, 53 are tightened by means of clamping screws 55 excited against each other.

The second clamping sleeve part 53 is a Claw coupling 113 connected to the threaded spindle 50. The threaded spindle 50 is in turn via roller bearings 56 and 112 stored in the threaded spindle housing 67 or housing 1.

The threaded spindle 50 is thus independent stored by the servo motor 48 without play.

The fact that ring clamping elements for connection can serve with the smooth motor shaft, a standardized Servo motor, i.e. not a special design, used become.

On the threaded spindle 50 is an adjusting nut 57 arranged.

On this adjusting nut 57 is a double-armed Lever 93 with a first arm 94 and a second Arm 95 stored. This lever 93 is used here Description text referred to as the second double-armed lever 93.

It can be seen from FIG. 4 that the Adjusting nut 57 has a square cross-sectional shape and also in a square cross-sectional shape having the interior of the first double-armed Lever 93 is inserted. This is the adjusting nut 57 secured against twisting.

In the first arm 94 of a first double-armed A lever 58 is inserted into lever 93. This bolt 58 protrudes through an elongated hole 59 in a connecting rod 96.

This connecting rod 96 sits on an eccentric disc 97, via a shaft 98 with a third drive motor 99, for example a servo motor, connected to the drive is. The control of the drive motor is indicated with the reference number 100.

The second arm 95 of the first double arm Lever 93 is a via a tab 101 on the first arm 102 second double-armed lever 103 articulated. The second double-armed lever 103 is mounted on a shaft 60. The second arm 104 of the second double-armed lever 103 is fork-shaped, as in FIGS. 4 with the reference numerals 65, 66 denoting the fork levers is shown.

The shaft 60 is in the threaded spindle housing 67 sealed oil-tight by means of seals 61, 62, so that a closed threaded spindle housing 67 as a closed Lubricating oil space is available, in which the threaded spindle 50 and the components described are maintenance-free are arranged in a closed room.

In particular, it can be seen from FIG. 4 that the shaft 60 at both ends from the lead screw housing 67 protrudes and that the fork levers 65, 66 are clamped on the protruding ends.

These fork levers 65 and 66 are over a Ball head connection on an upper shaft section 68 or 69 one generally designated 70 or 71 Control rod articulated with the lower shaft sections 72 or 73 are screwed. The described shaft sections are against each other by means of lock nuts 74 and 75 Twisted secured.

The control rods are at their lower end articulated on the rocker 33.

The rocker 33, in which the upper feed roller 10 is stored, is at its other end connected to a shaft 79. This shaft 79 is in the housing 1 stored. The bearings 80, 80a are in FIG. 5 located.

It can thus be seen that the swing arm 33 with the upper feed roller 10 mounted therein perform the shaft 79 pivotal movements can. So that the upper feed roller 10 against the lower Feed roller 22 with the one located thereon Metal strip 7, which is advanced in the direction of arrow B. and moves against and away from it become.

FIG. 6 also shows the belt infeed table 81 and the belt exit table 82, on which tables the metal band 7 on both sides of the lower one Feed roller 22 rests.

The rocker 33 is by compression springs 83, 84 stretched against the lower feed roller 22.

The contact pressure of the compression springs 83, 84 is by means of threaded spindles 85, 86 and lock nuts 87, 88, which are supported on the threaded spindle housing 67.

The contact pressure is set with Help reading the position of the on the compression springs 83, 84 disks 89, 90 on scale 91. Obviously is a scale for the compression springs 83, 84 assigned.

The feed device described is for this determined, a band-shaped blank 7, e.g. a metal band 7, one with tools for intermittent editing of the band-shaped blank equipped press.

This feed device is shown in FIG and the press 76 assigned to it, a punch press, schematically recorded.

The punch press 76 has a drive 77 on. This drive 77 can, as is generally known to the person skilled in the art is known to have an electric motor that a Has crankshaft or a shaft with eccentric discs. This crankshaft or eccentric is in Drive connection with a connecting rod 78. On this connecting rod 78, a plunger 105 is articulated. The plunger 105 carries an upper tool 106, which consequently operates the punch press 76 is moved up and down. The upper tool 106 is with processing tools, e.g. Stamp 107 equipped. Next is the upper tool 106 with catch pins 108 equipped, each with a conical head section 109 have.

As is well known, are in operation before hitting the processing tools, e.g. the stamp 107 on the band-shaped blank 7 for actual processing the pre-punched pins 108 Holes in the blank 7 moved in to precisely this Center. The upper feed roller 10 is of the lower feed roller 22 briefly around a small distance lifted off so that no clamping force on the band-shaped Blank 7 is exercised. This position of the top Feed roller 10 is referred to as the intermediate release position.

13 are the fixed ones Lower tool 110 and the control device 111 of the Stamping press 76 shown.

It can be seen that the control devices 49, 110 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.

The positions of FIG. 10 are schematic shown parts of the feed device shown in continuous operation. Rotate in continuous operation the upper feed roller 10 and the lower feed roller 22, which are driven intermittently by the servomotor 2, so that the ribbon-shaped blank 7 as general is known, is gradually advanced. It works the (electronic) control device 49 of the feed device with the (electronic) control device 111 a punch press 76 together, see Figure 13. The Stamping press 76 has a moving upper tool 106 and a fixed lower tool 110. The top tool 106 is connected to a plunger 105. The ram 105 is driven by a rotating drive 77, e.g. electric motors and crankshaft or eccentric shaft, via a connecting rod 78 driven, the connecting rod 78 purely schematically the Drive connection between the drive 77 and the plunger 105.

Thus, the pestle is between an upper one Dead center position and a lower dead center position are movable.

The thickness of the band-shaped blank 7 and accordingly the distance between the upper feed roller 10 and the lower feed roller 22 is in the Figure 10 shown with the letter E.

To a new ribbon-shaped blank 7, so for example a metal band between the upper feed roller 10 and the lower feed roller 22 to be able to, the upper feed roller 10 must be raised so that they are a predetermined distance D from the has lower feed roller 22, which is larger than that Distance E is. This distance D and the raised one The position of the upper feed roller 10 is shown in FIG. 11 shown.

This position of the feed roller 10 is in referred to in the professional world as a ventilation position.

To set this ventilation position the control devices 49 and 111 of the feed device and the punch press 76 operated such that the ram 105 of the punch press from the bottom dead center position away and that the connecting rod 96 from top dead center. In what specific positions the ram 105 and the connecting rod 96 are irrelevant as long as the Tappet is not in the bottom dead center position. In general, however, and this is known to the person skilled in the art the control devices 49 and 111 of the feed device and operated the punch press in such a way that the ram 105 of the punch press 76 in the top dead center position and that the connecting rod 96 is in the bottom dead center position. The following description proceeds from these latter dead center positions out. If the dead center positions mentioned are reached, the adjusting nut 57 by rotating it accordingly the threaded spindle 50 is lowered.

The bolt 58 is due to the Compression springs 82, 84 via the rocker 33 and the lever devices 93 and 103 at the lower end of slot 59 on.

Due to the downward movement of the Adjusting nut 57 becomes the first arm 94 of the first double-armed Lever device 93 pivoted up and her second arm 95 pivoted downwards. That second arm 95 pulls the first arm 102 of the second double-armed lever device 103 also down. Thus the second arm 104 of the second double-armed lever device 103 pivoted upwards. Consequently, the control rod assembly 68-75 lifted up and thus the rocker 33 with the upper feed roller 10 stored therein in the Lifting position of the upper feed roller 10 pivoted, at which the distance D from the bottom Has feed roller 22, so that a new band-shaped Blank 7 can be inserted.

The upper feed roller must be used for continuous operation 10 lie on the band-shaped blank 7, wherein through the upper feed roller 10 and the lower feed roller 22 a clamping force for a frictional engagement on the band-shaped blank 7 must be exercised.

This clamping force is due to the compression springs 83, 84 generated. So the bolt 58 must no longer be open rest on the lower end of the elongated hole 59. This will the adjusting nut 57 by rotating the threaded spindle 50 lowered from the raised position until the upper one Feed roller 10 rests on the band-shaped blank 7. By continuing to lower the adjusting nut 57 the first double-armed lever 93 is forced one Perform pivoting movement because the swing arm is not moved more because the upper feed roller 10 through the Compression springs 83, 84 lying on the band-shaped blank 7 is held. The swiveling movement causes that the first arm 94 with the pin 58 upwards pivots so that the pin 58 in the running hole 59 between the ends of which are located. That means the connecting rod 96 can basically perform lifting movements without that there is an action on the bolt 58.

Another movement during operation the feed device with the punch press is the intermediate air movement.

It has been mentioned above that a Upper tool 106 of a punch press with catch pins 108 for precise positioning of the band-shaped blank 7 can be equipped.

To enable positioning, the band-shaped blank 7 are exposed for a short period. This means that the upper feed roller 10 is brief from the band-shaped blank 7 in an intermediate ventilation position must be lifted off.

This intermediate ventilation position is controlled by the Connecting rod 96 causes.

For the time being, the punch press 76 is in the lifting position driven at which the intermediate ventilation takes place and in what position the conical head sections 109 of the catch pins 108 partially into the positioning holes are retracted. This position can be seen in Figure 13.

The plunger is in this position 105 of the punch press 76 in an angular position in front of lowest dead center position. Between this angular position and the bottom dead center position is thus an angular distance available.

The connecting rod 96 of the feed device is now at the same time by actuating its drive motor 99 in a position before its top dead center position been moved up. So is between this angular position and the top dead center position also an angular distance available.

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

Now the adjusting nut 57 is rotated the threaded spindle 50 moves down. With that comes the bolt 58 to rest against the lower end of the elongated hole 59. The adjusting nut 57 is then further down moved so that due to the swivel movements now taking place the lever devices and the rocker 33 die upper feed roller 10 releases the band-shaped blank. In this released state, the ribbon-shaped blank is manually lockable loose. This position of the adjusting nut 57 together with the relevant angular positions stored in the control devices 49 and 111.

That means that in continuous continuous operation the connecting rod 96 with the slot 59 relative to Bolt 58 can move freely without affecting the bolt with the exception that if the connecting rod 96 the above-mentioned angular position before top dead center of the connecting rod 96 reached the lower end of the Elongated hole 59 grips the bolt 58, lifts it up and after going through top dead center is, the bolt 58 is released again.

Claims (11)

Feed device for the intermittent feeding of a band-shaped blank (7) to a press equipped with tools for intermittent processing of the band-shaped blank (7), which feed device comprises a housing (1) and a threaded spindle housing (64) arranged on the housing (1), one on one Has upper shaft (8, 9) arranged upper feed roller (10) and a lower feed roller (22) arranged on a lower shaft (20, 21), which feed rollers (10, 22) are intended to feed the blank (7) by a bilateral To seize clamps and intermittently advance them by means of an intermittent rotational movement, of which shafts (8, 9; 20, 21) at least one is connected to an intermittently operating electric servo motor (2) and the upper shaft (8, 9) in a via a rocker shaft ( 79) is mounted on the rocker arm, by means of which it moves against and against the lower shaft (20, 21) is gbar, characterized by a motor (48) with a threaded spindle (50) and a control device (49), on which threaded spindle (50) arranged an adjusting (57) and is movable by a rotating of the threaded spindle (50) along the same, by having a driven by a drive motor (99) eccentric disc (97) on which a connecting rod (96) is mounted at the location remote from the eccentric disc (97) end at least approximately parallel to the threaded spindle (50) extending elongate hole (59), by a first, double-armed lever device (93, 94, 95) mounted on the adjusting nut (57) and a second, two-armed lever device (103;) mounted on a shaft (60) carried in the threaded spindle housing (64). 102; 104), which first double-armed lever device (93; 94, 95) has a first (94), which is in engagement with the connecting rod (96) and a second arm (95), which is articulated on a tab (101), which in turn is articulated on a first arm (102) of the second double-armed lever device (103; 102, 104), on the second arm (104) of which a control rod arrangement (68-75) is articulated, which is articulated on the rocker (33), and by a compression spring arrangement (82, 84) arranged between the rocker arm (33) and the threaded spindle housing (67), which compresses the rocker arm (33) with the upper shaft (8, 9) mounted therein with the upper feed roller (10) against the lower shaft (20, 21) with the lower feed roller (22). Feed device according to Claim 1, characterized in that the threaded spindle (50) is mounted without play in the threaded spindle housing (67) and the frame (1) via roller bearings (56, 112), so that the threaded spindle (50) is positioned precisely. Feed device according to claim 2, characterized in that the sleeve part (53) is part of a multi-part clamping sleeve (52, 53, 54) into which the drive shaft (51) of an adjusting motor (48) of an adjusting device projects, characterized by an adjusting motor (48) with a drive shaft (51) which is drive-connected to the threaded spindle (50) via a multi-part clamping sleeve (52, 53, 54), followed by a claw coupling (113). Feed device according to claim 1, characterized in that the second arm (104) of the second double-armed lever device (103; 102, 104) is designed as a fork lever (65, 66), which is a part (68; 69) of each via ball head connections Control rod assembly (69-75) forming control rod (71, 72) is articulated. Feed device according to claim 4, characterized in that the shaft (60) is sealed oil-tight against the threaded spindle housing (67) by means of sealing rings (61, 62), so that the threaded spindle housing (67) forms a closed oil space. Feed device according to claim 5, characterized in that each control rod arrangement (68-75) has rod sections (68, 70, 69, 71) screwed together for length adjustment. Feed device according to claim 1, characterized in that the first arm (94) of the first double-armed lever device (93; 94, 95) is in engagement with the connecting rod (96) via a bolt (58) penetrating the elongated hole (59). A method of operating the feed device according to claim 1, wherein the feed device has a control device (49) and cooperates with a press (76) having a moving upper tool (106) and a fixed lower tool (110), which upper tool (106) with a plunger (105) which is movable between an upper dead center position and a lower dead center position, and which has a press control device (111) which is connected to the control device (49) of the feed device, and in which the elongated hole (59) connects between one Upper connecting rod and a lower dead center movable connecting rod (96) has an upper and a lower end, the first arm (94) of the first double-armed lever device (93; 94, 95) engages via a bolt (58) passing through the elongated hole (59) stands with the connecting rod (96), un for inserting a new band-shaped blank (7) between the upper feed roller (10) d of the lower feed roller (22), the upper feed roller (10) is moved into a venting position in order to fix a predetermined distance (D) between the upper feed roller (10) and the lower feed roller (22) in this position, characterized in that for Adjusting the lifting position of the upper feed roller (10) said two control devices (49; 111) are controlled in such a way that the tappet (105) is controlled in its top dead center position and the connecting rod (96) in its bottom dead center position. A method according to claim 8, characterized in that when the plunger (105) and the connecting rod (96) are stationary, the adjusting nut (57) is lowered by rotating the threaded spindle (50), the bolt (58) due to the pressure spring arrangement (82 , 84) applied force, which acts via the rocker 33 and the lever devices (93; 94, 95 and 103; 102, 104) at the lower end of the elongated hole, whereby the first arm (94) of the first double-arm lever device (93; 94, 95) is pivoted up and the second arm (95) thereof is pivoted down, the first arm (102) of the second double-arm lever device (103; 102, 104) is pivoted down and the second arm (104) is pivoted up, consequently the control rod arrangement (68-75) are lifted due to these pivoting movements and the rocker (33) with the upper feed roller (10) mounted therein is pivoted into the raised position of the upper feed roller (10). A method of operating the feed device according to claim 1, wherein the feed device has a control device (49) and cooperates with a press (76) having a moving upper tool (106) and a fixed lower tool (110), which upper tool (106) with a plunger (105) which is movable between an upper dead center position and a lower dead center position, and which has a press control device (111) which is connected to the control device (49) of the feed direction, and in which the elongated hole (59) connects between one Upper connecting rod and a lower dead center movable connecting rod (96) has an upper and a lower end, the first arm (94) of the first double-armed lever device (93; 94, 95) engages via a bolt (58) passing through the elongated hole (59) with the connecting rod (96), characterized in that the connecting rod (96) is in a position distant from its top dead center position is moved, the adjusting nut (57) is moved downward by rotating the threaded spindle (50) until the upper feed roller (10) due to the pressure exerted by the compression springs (82, 84) on the rocker arm (33) on the band-shaped blank ( 7), in which position the bolt (58) is at a distance from both ends of the elongated hole (59), so that lifting movements of the connecting rod (96) are possible when the bolt (58) is stationary. A method of operating the feed device according to claim 1, wherein the feed device has a control device (49) and cooperates with a press (76) which has a moving upper tool (106) and a fixed lower tool (106) with one between an upper dead center position and a lower dead center position movable plunger (105), and which has a press control device (111) which is connected to the control device (49) of the feed device, and in which the slot (59) of the movable between an upper dead center position and a lower dead center position Connecting rods (96) have an upper and a lower end, the first arm (94) of the first double-armed lever device (93; 94, 95) is in engagement with the connecting rod (96) via a bolt (58) passing through the elongated hole (59) Which plunger (105) is driven by a rotating drive (77) and the eccentric disc (97) of the connecting rod (96) by a drive motor Tor (99) is driven, which upper tool (106) catch pins (108, 109) for precise positioning of the band-shaped blank (7) in the press (76) during the machining process thereof, which catch pins (108, 109) in pre-punched positioning holes in band-shaped blank (7) are moved in, and which catch pins (108, 109) have a conical head section (109), the upper feed roller (10) then pointing away from the lower feed roller (22) into an intermediate ventilation position when the conical head sections (109) have been partially inserted into the positioning holes and then placed back on the blank (7) when the conical head sections (109) have been partially lifted out of the position holes, characterized in that for setting the intermediate air position of the plunger ( 105) is brought into an angular position before its bottom dead center position by its rotating drive (77), in which angle The conical head sections (109) of the catch pins (108, 109) only partially protrude into the positioning holes, in which state the eccentric disc (97) of the connecting rod (96) assumes an angular position before the top dead center position, the angular distance of the plunger (105 ) between the said angular position and the bottom dead center position is equal to the angular distance of the eccentric disc (97) between its mentioned angular position and the top dead center position, that the adjusting nut (57) is then moved downward, so that the bolt (58) bears against the the lower end of the elongated hole (59) comes and the adjusting nut (57) is moved further downwards until the band-shaped blank (7) is lifted by lifting the upper feed roller (10) due to the movement of the lever devices (93; 44, 95) and 103; 102, 104) and the control rod arrangement (68-75) and rocker (33) transmitted motion is loose, and that the position reached of the adjusting nut (57) for said angular position of the eccentric disc (97) and the corresponding angular position of the plunger (105) are stored in the corresponding control devices (49, 111).

Images