EP3632600A1 - Board separation system - Google Patents

Abstract

Panel cutting system (1) for sawing at least one workpiece (2), the panel cutting system (1) having at least one workpiece support table (3) and at least one saw (4) and at least one pressure beam (5) and at least two pressure beam supports (6, 7) and Has at least one electric motor (8), the saw (4) for sawing the workpiece (2) can be moved along a saw line (9) of the workpiece support table (3) and the pressure bar (5) can be moved on the pressure bar uprights (6, 7) and is driven by the electric motor (8) for executing the travel movements along the pressure beam uprights (6, 7) and for pressing the workpiece (2) in the area of the saw line (9) against the workpiece support table (3), the plate dividing system (1) being a parking brake (12) for locking the pressure bar (5) in its respective instantaneous position relative to the workpiece support table (3), the parking brake (12) at least between a locking state and a m Release status can be switched. (Fig. 1)

Description

The present invention relates to a panel sizing system for sawing at least one workpiece consisting of at least one single panel or at least one stack of panels, the panel sizing system having at least one workpiece support table and at least one saw and at least one pressure bar and at least two pressure bar supports and at least one electric motor, the saw being used for Sawing of the workpiece lying on the workpiece support table can be moved along a saw line of the workpiece support table and the pressure beam on the pressure beam supports is movably supported in the direction towards the workpiece support table and in the direction away from the workpiece support table and by the electric motor for executing the movement movements along the pressure beam support and for pressing the workpiece in the area the saw line is driven to the workpiece support table. In addition, the invention also relates to methods for operating such plate dividing systems.

From the EP 2 233 236 B1 it is known to operate a pressure bar of a plate dividing system by means of a type of hybrid drive, which comprises both an electric motor and a pneumatic drive.

From the generic DE 20 2008 002 323 U1 a plate slicer is known in which the pressure beam is driven exclusively by an electric motor. This document specifically shows variants in which the electric motor is mounted below the workpiece support table in order to drive two spindles. Alternatively, it is also proposed in this document to arrange a motor in the pressure beam itself, so as to drive a rack and pinion gear on both sides of the pressure beam. Due to the use of the electric motor as the only drive, the DE 20 2008 002 323 U1 before, the transmission mechanisms, in particular those shown Spindle gear, self-locking. This has the advantage that if the electric motor fails, the pressure beam is automatically held in its position and there is no fear that it will go down on the workpiece support table in an uncontrolled manner. It should be borne in mind here that plate dividing systems are safety-relevant systems in which the operating personnel must be adequately protected from possible sources of injury, which includes the pressure beam.

The object of the invention is to improve a plate dividing system of the type mentioned above in such a way that the movement when moving the pressure beam along the pressure beam upright and the pressing of the workpiece in the area of the saw line on the workpiece support table can be controlled and / or regulated as well as possible .

For this purpose, it is provided that the plate dividing system has a parking brake for locking the pressure beam in its respective instantaneous position relative to the workpiece support table, the parking brake at least between a locking state in which the pressure bar is locked in its respective instantaneous position relative to the workpiece support table and a release state , in which the pressure bar can be switched over, preferably completely, from the parking brake for moving along the pressure bar upright relative to the workpiece support table and for pressing the workpiece in the area of the saw line onto the workpiece support table.

With the additionally provided parking brake, the plate dividing system according to the invention has an additional security feature with which the pressure bar can be securely held in its current position whenever the electric motor is inactive, so that the plate dividing system ensures that uncontrolled operation due to the parking brake Movements of the pressure bar and in particular an uncontrolled sinking of the pressure bar onto the workpiece support table are prevented. Due to the parking brake provided according to the invention, on a self-locking design of the transmission mechanism arranged and / or acting between the electric motor and the pressure bar for movement and guidance along the pressure bar upright and for pressing the pressure bar can be dispensed with. Due to this, contrary to the teachings of the prior art, not self-inhibiting design of the transmission mechanism, the mechanical resistances to be overcome by means of the electric motor when moving and pressing the pressure bar are much lower than in the prior art, so that the movement of the pressure bar in the direction of the workpiece support table and in the direction away from the workpiece support table and also the pressing of the workpiece in the area of the saw line against the workpiece support table can be regulated and / or controlled much more precisely and / or controlled by means of the pressure bar than in the prior art.

In preferred embodiments, the parking brake can be brought into the locking state in any current position, that is to say the current position of the pressure beam relative to the workpiece support table, so that the pressure beam can be locked in any current position by means of the parking brake. In the release state it is provided that the parking brake releases the pressure bar, preferably completely. To release completely means that the parking brake does not exert any braking effect on the pressure beam when it is released. As an alternative to this, variants can of course also be provided in which a certain residual braking effect of the parking brake is present in the release state, but the pressure beam can be moved or moved along the pressure beam stand relative to the workpiece support table despite this residual braking effect. In any case, the instantaneous position is understood to mean the respective position of the pressure bar relative to the workpiece support table which it is currently occupying. When moving along the pressure beam stands, the pressure beam changes its current position.

In preferred embodiments of the invention, it is provided that the electric motor (s) are the only or the only motor drives for moving the pressure bar along the pressure bar upright and for pressing the Workpiece in the area of the saw line on the workpiece support table. In other words, it is provided that it is a purely electrically actuated pressure bar, that is to say that additional pneumatic or other motor drives are not present, as in the prior art mentioned at the beginning. A motor drive or in other words motor is a component that itself generates a movement. This is to be distinguished from the transmission mechanism, which is used exclusively to transmit, translate a movement already generated by the motor drive, and the like.

It is therefore preferably provided that the pressure bar of the plate sizing system or each pressure bar of the plate sizing system is driven by exactly one electric motor as the only motor drive unit for executing the movement movements of the pressure bar along the pressure bar stands and for pressing the workpiece in the area of the saw line against the workpiece support table by means of the pressure bar.

Preferred variants provide that the parking brake is an automatically closing parking brake. Conveniently, this is a parking brake, which in the non-active state of the electric motor forcibly and preferably assumes the locking state on its own. The inactive state of the electric motor could also be referred to as the passive state of the electric motor. These are to be understood as all those states in which the electric motor does not exert any or only insufficient forces on the pressure bar in order to hold the pressure bar in its current position or to move it in a controlled manner. The inactive state can be the switched-off state of the electric motor, a defect in the electric motor, a de-energized and / or de-energized state of the electric motor or the like.

Suitable parking brakes and in particular automatically closing parking brakes are known per se in the prior art. They are often referred to as safety brakes. Generally speaking, they did The task is to brake moving masses or loads from the movement if necessary and then to hold them securely when stationary. The parking brake preferably derives the braking force from a prestressed element, such as a spring or another hydraulic or pneumatic pressure accumulator, for example. These automatically closing parking brakes can be brought into the release state, for example by an electric or electromagnetic, hydraulic, pneumatic or other type of motor drive . In the de-energized state, they are conveniently always closed. Corresponding automatically closing parking brakes are used in the prior art, for example, to implement emergency stop or power failure scenarios. Even if the automatically closing parking brake is damaged, for example due to a break in the power supply line or failure of the motor drive to open the brake, the braking force is retained and thus the automatically closing parking brake in its locked state. This ensures the required braking effect even under unfavorable conditions and malfunctions.

For the sake of completeness, it is pointed out that, in the case of the parking brakes according to the invention, it can of course also be provided that, in addition to the locked state and the released state, they can also implement different braking states in which the pressure bar is braked to a greater or lesser extent.

In principle, the parking brake and the electric motor can be separate components. In other words, the parking brake can, so to speak, be present as an additional component in addition to the electric motor. However, particularly preferred variants of the invention provide that the parking brake is integrated in the electric motor. It can be provided that the parking brake acts on an output shaft of the electric motor at least in the locked state. The output shaft is the moving component of the electric motor, preferably rotating about its longitudinal axis, to which the transmission mechanism is connected. The output shaft is thus the component of the electric motor, with which the movement generated by the electric motor, in particular rotary movement, is transmitted to the transmission mechanism.

Preferred variants of plate dividing systems according to the invention provide that the plate dividing system has a position determining device for determining the respective instantaneous position of the pressure beam relative to the workpiece support table. With this position determination device, the current position, that is to say the current position of the pressure bar, can advantageously be determined at any time during the operation of the plate dividing system.

Favorable variants of the invention provide that the position determining device is integrated in the electric motor. It is again particularly favorable if the movement of one or the drive shaft of the electric motor is measured by the position determining device. Electric motors in which such position determining devices are integrated are known in the prior art, as are electric motors in which both a parking brake and a position determining device are integrated.

Plate dividing systems according to the invention can be designed so that they work fully automatically. In these cases, the workpieces are moved and positioned fully automatically by feed devices, removal devices and the like, which are known per se, so that no operating personnel is required to manipulate the workpiece in the area of the plate dividing system. In the case of plate dividing systems according to the invention, however, it can also be provided that workpieces are at least partly fed or returned to or removed from the saw line by operating personnel. In such panel sizing systems, care must be taken to ensure that the operating personnel are not injured by the pressure beam and / or the saw. In this context, preferred variants of the plate dividing system according to the invention provide that the pressure bar can be moved into a safety position provided for the manipulation of the workpiece by operating personnel and distant from the workpiece support table, and the plate dividing system a safety position sensor Determine whether the pressure bar is in the safety position. It can then be provided that the manipulation of the workpiece by the operating personnel only takes place when the pressure bar is in its safety position, which can be monitored by the safety position sensor. In order to ensure a high level of operating safety in plate dividing systems, in which the workpieces are also manipulated by operating personnel in the area of the plate dividing system, it is also advantageously provided that the plate dividing system has at least one intervention monitoring device for determining manual intervention by operating personnel in an area between the pressure beam and the workpiece support table . Suitable intervention monitoring devices are known per se in the prior art for plate dividing systems. The intervention monitoring device can be, for example, a pressure sensor bar arranged on a side of the pressure bar facing the workpiece support table on the pressure bar. Other suitable intervention monitoring devices are, for example, known lamella curtains which must be opened by the operating personnel in a targeted manner in order to get into the area of the pressure beam and the saw line. Another intervention monitoring device can also be a safety bar, for example. The pressure sensor bar as well as the safety bar are expediently designed in such a way that they recognize an arm or a hand of the operating personnel, which is or are inadvertently arranged between the pressure bar and the workpiece or pressure bar and the workpiece support table. While the pressure sensor bar is conveniently integrated directly into the surface of the pressure bar with which the pressure bar presses on the workpiece or the workpiece support table, the lamella curtain and / or the safety bar are advantageously spaced from the pressure bar on the side of the pressure bar and thus also the saw line, from which the operating personnel access when manipulating the workpieces. This area is seen in a main transport direction, in which the workpieces are fed to the saw line, for example from a feed device known per se, to the sawing line behind the saw line. The safety bar can be attached directly to the pressure beam and accordingly in the direction mentioned stand out. In the case of plate dividing systems according to the invention, the intervention monitoring devices mentioned can occur individually or in combination. Of course, other intervention monitoring devices, such as emergency switches and the like, can also be provided individually or in combination.

As already explained above, the parking brake provided according to the invention enables the transmission mechanism between the electric motor and the pressure beam to be designed with as little loss as possible and, above all, not to be self-locking, so that the pressure beam moves and presses onto the workpiece to be sawn and / or the workpiece support table as far as possible can be precisely controlled or regulated. In this sense, it is advantageously provided in plate dividing systems according to the invention that the pressure bar, following gravity, lowers from a position distanced from the workpiece support table in the direction toward the workpiece support table when the electric motor is in the inactive state and the parking brake is in the release state.

Particularly preferred variants of plate dividing systems according to the invention provide, in the sense of the most precise controllability, that between the pressure beam and the electric motor, preferably between the pressure beam and one or the output shaft of the electric motor, a transmission mechanism of the plate dividing system for moving and guiding the pressure beam along the pressure beam stand and for pressing the workpiece in the area of the saw line to the workpiece support table is arranged and / or acts and the transmission mechanism has an overall efficiency of at least 80%, preferably of at least 90%, when the parking brake is in the release state. The transmission mechanism comprises all the components that are used to transmit the movement generated by the electric motor and to convert this movement into the travel movement of the pressure beam and into the pressing of the workpiece in the area of the saw line on the workpiece support table. In other words, the Transmission mechanism all the, especially moving, components, which are provided for converting the movement generated by the electric motor into a corresponding movement or pressing the pressure bar. The overall efficiency of the transmission mechanism results from all the efficiencies of the components which make up the transmission mechanism and are referred to below as partial efficiencies. As a rule, these partial efficiencies for the individual components are already specified by the manufacturer or can be taken from the specialist literature, so that the overall efficiency of the transmission mechanism, as is known per se, is calculated from the product of the partial efficiencies of all components of the transmission mechanism. The overall efficiency of the transmission mechanism is always lower than the individual partial efficiencies of the individual components of the transmission mechanism. Since the electric motor and its drive shaft, if any, are not part of the transmission mechanism, the efficiency of the electric motor and also of the motor controller assigned to it are not taken into account when calculating the overall efficiency of the transmission mechanism.

As an alternative to the arithmetical determination of the overall efficiency from information provided by the manufacturers of the individual components and / or from the corresponding specialist literature, the overall efficiency of the transmission mechanism can also be determined by measurement. For this purpose, the pressure bar can be lifted and lowered at a slow, constant travel speed of, for example, 10 mm / s (millimeters per second), and in each case record the effective torque transmitted by the electric motor, in particular its drive shaft. Commercially available regulating and control devices for electric motors make this effective torque of the electric motor or the drive shaft available as standard, so that the corresponding values of the effective moments can be easily read or read. Alternatively, however, it is of course also possible to determine this effective moment in the lifting and lowering movement mentioned by measuring devices known per se. The lifting movement is a movement of the pressure beam along the pressure beam upright in the direction of Workpiece support table gone. This lowering movement is a movement of the pressure beam along the pressure beam upright in the direction of the workpiece support table. The overall efficiency of the transmission mechanism is then, as is generally known, calculated from the root of the quotient of the active torque during the lowering movement by the active torque during the lifting movement. The efficiency can therefore be determined using the following formula: $$\mathit{Overall\; efficiency}=\sqrt{\frac{\mathit{Effective\; torque\; when\; lowering\; at\; a\; constant\; travel\; speed}}{\mathit{Effective\; torque\; during\; the\; stroke\; movement\; with\; constant\; travel\; speed}}}$$

The formulas described for determining the overall efficiency of a mechanical transmission mechanism are known per se and are e.g. already used in the planning and construction of pressure beam drives in the prior art.

Said transmission mechanism can have different components in different numbers and arrangements relative to one another. In any case, it is advantageously provided that the transmission mechanism has at least one drive gear for converting the movement generated by the electric motor into a movement of the pressure beam along the pressure beam uprights and / or into a pressing of the workpiece in the area of the saw line against the workpiece support table and at least one guide for guiding the pressure beam along the pressure beam stand includes. The drive gear converts the movement generated by the electric motor into a corresponding movement of the pressure bar along the pressure column and / or into a pressing of the workpiece in the area of the saw line onto the workpiece support table. The drive gear can have or consist of, for example, a rack and pinion gear or a spindle gear or other suitable types of drive. However, the transmission mechanism also includes at least one guide with which the pressure beam is guided on the pressure beam stands when it moves along the pressure beam uprights and when the workpiece is pressed against the workpiece support table in the area of the saw line. The leadership could also be called a management facility. Depending on the type of electric motor used, it can be provided that the transmission mechanism additionally has a step-up and / or step-down gear for step-up and / or step-down of the movement generated by the electric motor. This step-up and / or step-down gear can be used, for example, so that, on the one hand, the electric motor can work in the optimal speed range and, on the other hand, the speeds and forces required to move or press the pressure bar can be achieved. The step-up and / or step-down gear is advantageously, if necessary, arranged between the electric motor and the drive gear.

Another aspect of the invention also relates to a plate sizing system for sawing at least one workpiece consisting of at least one single plate or at least one plate stack, the plate sizing system having at least one workpiece support table and at least one saw and at least one pressure bar and at least two pressure bar stands and at least one electric motor, wherein the saw for sawing the workpiece lying on the workpiece support table can be moved along a saw line of the workpiece support table and the pressure beam on the pressure beam supports can be moved in the direction towards the workpiece support table and in the direction away from the workpiece support table and by the electric motor for executing the movement movements along the pressure beam support and for pressing the Workpiece is driven in the area of the saw line on the workpiece support table.

This aspect of the invention has set itself the task of arranging the electric motor so that the transmission mechanism to the pressure beam can be designed as simply and efficiently as possible.

To achieve this object, this aspect of the invention provides that the electric motor or each electric motor is arranged in the area of one of the pressure beam uprights, preferably in one of the pressure beam uprights.

This can be viewed both in connection with the other invention already described here, but also as a separate invention. The transmission mechanism can be designed very efficiently by arranging the electric motor or electric motors in the area of one of the pressure beam supports. It is particularly preferably provided that the electric motor is arranged in one of the pressure beam supports or in other words in a cavity of one of the pressure beam supports. The electric motor can definitely e.g. When the pressure beam has moved to the maximum distance from the workpiece support table, partially protrude from the pressure beam stand.

In this context, it is particularly favorable that the pressure bar or each pressure bar is driven by exactly one electric motor as the only motor drive unit. In these embodiments, the electric motor is then only per pressure bar in one of the pressure bar supports assigned to the pressure bar. At first glance, this embodiment appears to be disadvantageous, since an asymmetrical pressure distribution when the pressure bar is pressed onto the workpiece is initially to be feared for the person skilled in the art. This apparent disadvantage can, however, be compensated for by a corresponding rigidity of the pressure beam and the drive gear assigned to it. A major advantage of this one-sided arrangement of the electric motor is, however, that there is a particularly favorable pressure distribution when the pressure bar is to press narrow workpieces onto the workpiece support table only on one side, namely on the side of the electric motor. At this pressure beam stand, in the area or in which the electric motor is located, or at least between this pressure beam stand and the saw line, an angular stop of the plate dividing system is advantageously arranged for aligning the workpiece on the workpiece support table. The workpiece can then be placed against the angle stop during the sawing process, so that the above-mentioned advantage of the one-sided arrangement of the electric motor can develop fully in the area or in only one of the pressure beam stands. In contrast to the prior art mentioned at the outset, the electric motor or any electric motor is expedient arranged outside the pressure bar. This creates space for devices arranged and / or movable along the pressure beam, such as an aligning carriage and / or components of a suction system for dust and chips.

Preferred embodiments of the invention provide that the electric motor has a motor housing and the motor housing is fixed to the pressure bar in such a way that the electric motor is moved along with the pressure bar when the pressure bar is moved along the pressure bar uprights. For this purpose, the motor housing of the electric motor can e.g. be fixed to the pressure beam via an attachment housing. In the add-on housing, e.g. Components of the transmission mechanism can be accommodated.

Preferred embodiments of the invention provide that the electric motor drives a transmission shaft of the plate dividing system running along the pressure beam from one of the pressure beam supports to the other of the pressure beam supports. This transmission wave can be seen as part of the transmission mechanism. The transmission mechanism can then provide a drive gear such as, for example, a rack and pinion gear and / or a spindle gear on each of the two pressure bar supports assigned to an individual pressure bar. These two drive gears can be mechanically coupled to one another via the transmission shaft. The transmission shaft can be used, for example, to transmit the movement generated by a single electric motor, which is arranged in the area or in only one of the pressure beam uprights, via the transmission mechanism with the transmission shaft to both drive gears arranged on each of the pressure beam uprights. The transmission shaft also ensures a uniform movement of the pressure beam relative to both pressure beam uprights. A corresponding transmission shaft can also be used, however, if two pressure motors are assigned to the pressure beam, which are each arranged in the area or in one of the pressure beam supports. In this case, the transmission shaft can act as a mechanical coupling to standardize the movement, ie to synchronize the movement of one of the pressure beam supports arranged drive gear can be used.

A method for operating a plate dividing system according to the invention preferably provides that the parking brake is forcibly brought into the locked state when the electric motor is inactive. In this way, an uncontrolled movement of the pressure bar is always reliably avoided when the electric motor is in the inactive state, e.g. switched off, defective, de-energized, not live or the like. This prevents undesired movement, in particular falling of the pressure bar, so that the plate dividing system itself is protected against damage and the operating personnel, if any, are protected against injuries.

A method for operating a plate dividing system according to the invention can also provide that the pressure bar is moved into a safety position provided for the manipulation of the workpiece by operating personnel and distant from the workpiece support table and is held there by means of the electric motor or the parking brake if manual intervention by the at least one intervention monitoring device Operating personnel in the area between the pressure beam and the workpiece support table is determined. The safety of the operating personnel is paramount here. This procedure provides that the operating personnel can or should only reach into the area between the pressure bar and the workpiece support table when the pressure bar has moved into the safety position distant from the workpiece support table. In order to determine a manual intervention by the operating personnel in the area between the pressure beam and the workpiece support table, the intervention monitoring devices already mentioned at the beginning can be implemented individually or in combination as part of the plate dividing system. A safety position sensor already mentioned above can be used to monitor that the pressure bar is in the safety position. In principle, this can also be monitored via the position determination device already mentioned at the beginning. However, the safety position sensor is conveniently as additional security feature is provided which independently of the position determining device monitors that the pressure bar is in the security position.

The two methods mentioned can also be combined with one another. E.g. it can be provided that the pressure bar when the parking brake is released again after it has been brought into the locking state when the electric motor is in the inactive state, the pressure bar is first moved into the safety position, and then the continued operation of the plate dividing system again from the safety position to start in a controlled manner.

The safety position can also be reached from the pressure bar if it e.g. a sawing process is interrupted by a fault. In this context, a method for operating a panel sizing system according to the invention can provide that when a sawing process is interrupted, the saw is brought into a securing position and then the pressure bar moves into and / or a safety position provided for the manipulation of the workpiece by operating personnel and distant from the workpiece support table, and there by means of of the electric motor or the parking brake. A securing position of the saw can e.g. can be achieved in that the saw is lowered into an area below the workpiece support table. Another securing position can be achieved in that the saw is moved laterally out of the area of the pressure beam along the saw line.

1. a) Positionieren des Werkstücks auf dem Werkstückauflagetisch und der Sägelinie, wobei der Druckbalken während dieses Positionierens vom Werkstückauflagetisch distanziert angeordnet wird;
2. b) Absenken des Druckbalkens in Richtung hin zum Werkstück;
3. c) Stoppen des Druckbalkens beim Auftreffen auf dem Werkstück oder in einer vorgebbaren Position vor dem Auftreffen des Druckbalkens auf dem Werkstück;
4. d) Aufbringen eines vorgebbaren Sollanpressdrucks oder Sollanpressdruckverlaufs mittels des Druckbalkens auf das Werkstück und Zersägen des Werkstücks mittels der Säge entlang der Sägelinie;
5. e) Abheben des Druckbalkens vom Werkstück.

In addition, a further aspect of the invention relates to a method for operating a plate dividing system for sawing at least one workpiece consisting of at least one individual plate or at least one stack of plates, the plate dividing system comprising at least one workpiece support table and at least one saw and at least one pressure beam and at least two pressure beam stands and at least has an electric motor, wherein the saw for sawing the workpiece lying on the workpiece support table is moved along a saw line of the workpiece support table and the pressure bar on the Pressure beam uprights are moved in the direction of the workpiece support table and in the direction away from the workpiece support table and are driven by the electric motor to carry out the movement movements along the pressure beam uprights and to press the workpiece in the area of the saw line onto the workpiece support table. This method can be used to operate plate dividing systems of the types mentioned above and can thus be implemented using these plate dividing systems. However, such a method can also be used as an independent aspect or as an independent invention for operating other plate dividing systems with the features mentioned in this paragraph. The aim of this method is to provide a procedure which is as effective as possible and which is adapted as well as possible to the requirements of the workpiece to be sawn and the respective panel sizing system. For this purpose, this process provides that the following sequence of process steps is carried out:

1. a) positioning the workpiece on the workpiece support table and the saw line, the pressure bar being arranged at a distance from the workpiece support table during this positioning;
2. b) lowering the pressure beam towards the workpiece;
3. c) stopping the pressure bar when it strikes the workpiece or in a predeterminable position before the pressure bar strikes the workpiece;
4. d) applying a predeterminable set contact pressure or set pressure profile to the workpiece by means of the pressure bar and sawing the workpiece along the saw line by means of the saw;
5. e) lifting the pressure beam from the workpiece.

After the pressure bar has been lifted off the workpiece, the process sequence described can be carried out again by positioning another workpiece and working through the method steps mentioned. However, it can equally well be provided that the previously sawn workpiece as a whole or parts thereof are repositioned in order to then carry out the process steps a) to e) again. Before, after and / or between or in combination with the method steps mentioned, other ones not explicitly mentioned here can also be used Process steps are carried out.

When positioning the workpiece, it is preferably provided that the workpiece is placed against the angle stop. Positioning can be done mechanically e.g. by means of feed devices and / or aligning carriages of the plate dividing system known per se. The workpiece can also be positioned by manual manipulation on the part of the operating personnel.

In method step d), both a constant set contact pressure and a set contact pressure curve can be provided. In the latter, the target contact pressure varies in a predetermined manner during the sawing of the workpiece. Depending on the position of the saw along the saw line, for example, different target contact pressures can be provided. A control of the actual contact pressure, that is to say the actual contact pressure to the desired contact pressure or the desired contact pressure curve, is advantageously provided. For example, the instantaneous current consumption and / or the instantaneous effective torque of the electric motor driving the pressure bar or the electric motors driving the pressure bar can be used as the control variable. Alternatively or additionally, the respective actual contact pressure can also be measured as a controlled variable by means of a corresponding pressure sensor. The pressure sensor can be, for example, the pressure sensor bar already explained at the beginning and arranged on a side of the pressure bar facing the workpiece support table on the pressure bar. It is preferably provided that in step d) the predeterminable target contact pressure or target contact pressure curve is predetermined as a function of the workpiece and / or of a position of the saw along the saw line. For example, it is possible to take into account the material and / or the geometric dimensions of the workpiece and the position of the workpiece along the saw line when determining the target contact pressure or the target contact pressure profile. In the sense of a set contact pressure curve, the set contact pressure can also provide different set contact pressures for different positions of the saw along the saw line. For example, it is conceivable to have a different target contact pressure when the saw enters and / or exits the workpiece to be provided as if the saw is already in the workpiece and continues to saw the workpiece. The target contact pressure or the target contact pressure curve can also be carried out as a function of the cutting sequence and / or the required cutting quality. The contact pressure is advantageously regulated during the entire cutting process by means of corresponding specifications of target contact pressures and target contact pressure profiles.

In method step b), it is advantageously provided that a speed at which the pressure bar is lowered in the direction of the workpiece is predetermined and preferably also monitored as a function of the workpiece and / or as a function of an operating state or at least one parameter of the plate dividing system. A regulation of the speed can therefore be provided in method step b). The actual speed can be determined, for example, using the position determination device already mentioned at the beginning and a corresponding time measurement. The set speeds can be determined, for example, as a function of parameters of the workpiece, such as its material and size, or from operating conditions and / or parameters of the panel sizing system, such as the required cutting quality, the cutting sequence, etc. By specifying a corresponding setpoint speed profile, different setpoints can also be set for different sections of the movement. For example, it is possible to lower the pressure beam quickly first and then more slowly when it has already been lowered a little. In method step c), the impact of the pressure bar on the workpiece can be detected by measuring an operating parameter of the electric motor or by means of a separate impact sensor. The operating parameters of the electric motor are, for example, its current consumption, its effective torque or the like. The impact sensor, for example the pressure sensor bar already mentioned above on the side of the pressure bar facing the workpiece support table, can be used as the impact sensor. Alternatively, in method step c), a position of the pressure beam known from a previous sawing process can be used as the predeterminable position before the pressure beam hits the workpiece. If the dimensions of the The workpiece and in particular its thickness in the direction normal to the workpiece support table are known, the position at which the pressure bar stops can be specified so that the pressure bar is stopped shortly or immediately before the pressure bar hits the workpiece. The predeterminable position before the pressure beam hits the workpiece is advantageously at most 5 mm from the side of the workpiece facing away from the workpiece support table. In method step c), the impact on the workpiece is preferably carried out with the smallest possible force impulse or with the application of less force to the workpiece. The size of the force pulse or force effect can be controlled in preferred variants depending on parameters of the workpiece such as its material and / or size and / or from operating states and / or parameters of the plate sizing system, such as the required cut quality, the cutting sequence, etc.

• Fig. 1 ein erstes erfindungsgemäßes Ausführungsbeispiel einer Plattenaufteilanlage in einer Frontalansicht auf den Druckbalken aus Richtung des Bereichs in dem sich die Vorschubeinrichtung befinden kann;
• Fig. 2 einen hierzu orthogonalen Schnitt entlang der Schnittlinie AA aus Fig. 1;
• Fig. 3 bis 5 verschiedene Ansichten auf den Bereich B aus Fig. 1 unter Weglassung des Werkstücks;
• Fig. 6 bis 9 alternative erfindungsgemäße Ausgestaltungsformen des Bereichs B;
• Fig. 10 und 11 Darstellungen zum Andrücken des Werkstücks auf den Werkstückauflagetisch mittels des Druckbalkens des ersten Ausführungsbeispiels;
• Fig. 12 bis 17 Darstellungen zu einer weiteren Ausführungsvariante der Erfindung, bei der zwei Druckbalken vorgesehen sind;
• Fig. 18 eine weitere Ausführungsvariante der Erfindung in einer Darstellung analog zu Fig. 1, allerdings mit zwei Elektromotoren;
• Fig. 19 eine ebenfalls erfindungsgemäße Abwandlung der Ausführungsform gemäß Fig. 18;
• Fig. 20 ein weiteres erfindungsgemäßes Ausführungsbeispiel, welches entlang der Schnittlinie 2 hintereinander angeordnete Druckbalken aufweist;
• Fig. 21 einen beispielhaft eingezeichneten Wirkmomentverlauf des Elektromotors und
• Fig. 22 eine Schnittdarstellung zur Erläuterung verschiedener Möglichkeiten der Ausgestaltung von Eingriffsüberwachungseinrichtungen zur Feststellung eines manuellen Eingriffs von Bedienpersonal in den Bereich zwischen dem Druckbalken und dem Werkstückauflagetisch.

Further features and details of preferred embodiments of the invention are explained by way of example in the following description of the figures with reference to schematically illustrated exemplary embodiments of the invention. It should be noted that the individual preferred features are shown in combination with one another in the exemplary embodiments. However, this does not mean that these preferred features must always occur in this combination when implementing the invention. All of the preferred features or variants described below are thus also to be seen on their own and can also be implemented in other than the exemplary embodiments of the invention shown in combination with other preferred features of the invention. Show it:

• Fig. 1 a first embodiment of a plate dividing system according to the invention in a front view of the pressure beam from the direction of the area in which the feed device can be located;
• Fig. 2 an orthogonal section along the section line AA Fig. 1 ;
• 3 to 5 different views of area B. Fig. 1 omitting the workpiece;
• 6 to 9 alternative embodiments of area B according to the invention;
• 10 and 11 Representations for pressing the workpiece onto the workpiece support table by means of the pressure bar of the first embodiment;
• 12 to 17 Illustrations of a further embodiment of the invention, in which two pressure bars are provided;
• Fig. 18 a further embodiment variant of the invention in a representation analogous to Fig. 1 , but with two electric motors;
• Fig. 19 a modification of the embodiment according to the invention Fig. 18 ;
• Fig. 20 a further embodiment according to the invention, which has pressure bars arranged one behind the other along the section line 2;
• Fig. 21 an exemplarily drawn-in torque curve of the electric motor and
• Fig. 22 a sectional view for explaining various possibilities of the design of intervention monitoring devices for determining a manual intervention by operating personnel in the area between the pressure beam and the workpiece support table.

This in Fig. 1 The illustrated first exemplary embodiment of a plate dividing system 1 according to the invention shows a workpiece support table 3 with a workpiece 2 arranged thereon by way of example Fig. 1 The workpiece 2 shown by way of example is a plurality of stacked plate strips lying against one another. Of course, it can also be a stack of plates, individual plates, etc. For sawing, the respective workpiece 2 is positioned in the area of the saw line 9 on the support plane 25 of the workpiece support table 3 in such a way that the workpiece 2 is sawed in a sawing process by means of the saw 4, which can be moved along the saw line 9 with the saw carriage 33, which here is designed as a circular saw blade is can be sawn in the desired manner. Even if the support level 25 is not explicitly mentioned elsewhere, the fact that the workpiece 2 rests on the workpiece support table 3 means that the workpiece 2 rests on the support level 25 of the workpiece support table 3. In the exemplary embodiment shown, the saw carriage is 33, an additional scoring saw 34, here also designed as a circular saw blade, is provided. This is known per se, but does not necessarily have to be realized in this way. Advantageously, the saw 4, like the scoring saw 34, can be lowered in the saw carriage 33 to below the support plane 25 in a manner known per se. In this position, the saw 4 and the scoring saw 34 are so far lowered that they do not protrude beyond the workpiece support table 3 or its support plane 25. This can also be provided in the method already mentioned at the outset as a securing position of the saw 4 and, if appropriate, the scoring saw 34 which is also present. Another securing position would consist in moving the saw carriage 33 with the saw 4 and the scoring saw 34, if present, along the saw line 9 to such an extent that it comes outside the area between the pressure beam stands 6 and 7.

The positioning of the respective workpiece 2, which here is a stack of plates in the example shown, can be done mechanically, for example, with that in Fig. 2 indicated feed device 35 known per se. The feed device 35 grips in a manner known per se with its clamps 36 the workpiece 2 to be sawn and transports and positions the workpiece 2 on the workpiece support table 3 in relation to the saw line 9 in the desired manner, so that the cut by means of the saw 4 in the desired position can be done by the workpiece 2. In addition to the feed device 35 shown here by way of example, further transport and turning devices known per se can be provided in order to transport and position the workpiece 2 in a manner known per se to the saw line 9 and away from it. This can be carried out in numerous different variants as in the prior art and need not be explained further. In any case, the main transport direction 64 is generally the feed direction 37 with which the workpiece 2 to be cut is transported from the feed device 35 to the saw line 9, in particular before the first sawing process is carried out. Seen in the main transport direction 64, operating personnel 61 are generally located on the side behind the saw line 9, that is to say in Fig. 2 on the side of the saw line 9 opposite the feed device 35. From there the operating personnel can 61 Rotate workpieces 2 in a manner known per se, align them, feed them back to the saw line 9 or manipulate them manually in another manner. In principle, as already explained at the beginning, plate dividing systems 1 according to the invention can also be designed as fully automatic systems in which the operating personnel 61 are no longer required for manual manipulation of the workpieces 2 and generally also no longer have access to the saw line 9 for safety reasons.

The angle stop 22 known per se is located on one of the pressure beam uprights, here on the pressure beam upright 6. The workpiece 2 to be sawn can be placed on this and aligned with it.

According to the embodiment shown Fig. 1 the two pressure beam uprights 6 and 7 are connected to one another by means of a guide support 28. In this exemplary embodiment, an alignment carriage 29 is arranged displaceably thereon along the pressure beam 5. Such aligner carriages 29 and their drives are known per se. With their aligning cams 30, they can move the workpiece 2 to be sawn in the direction parallel to the saw line 9 and in particular towards the angle stop 22 and align it there.

The pressure beam 5 is mounted in a manner known per se on the pressure beam uprights 6 and 7 in the direction 10 towards the workpiece support table 3 and thus towards the workpiece 2 and in direction 11 away from the workpiece support table 3 and can thus the workpiece 2 in the correspondingly lowered state press on the workpiece support table 3 during the sawing process.

In the sectional view according to Fig. 2 it can be clearly seen that in this exemplary embodiment, as in the other exemplary embodiments, there is a suction channel 38 in the pressure bar 5 for extracting chips and dust which arise during the sawing process. A corresponding suction system, not shown here, can be connected to the suction connection piece 32 are so that in a manner known per se, the dust or chips generated during the sawing process can be sucked through the suction channel 38 and the suction connection piece 32. This can be done as is known in the art.

In this exemplary embodiment, the pressure beam 5 is guided on the pressure beam uprights 6 and 7 by means of a guide 20 in order to be able to execute the movement in directions 10 and 11. The electric motor 8 is provided as a motor drive for executing the movement of the pressure beam 5 along the pressure beam uprights 6 and 7 and for pressing the workpiece 2 in the area of the saw line 9 against the workpiece support table 3 by means of the pressure beam 5. According to the embodiment shown Fig. 1 this is the only motor drive with which the pressure beam 5 moves in the directions 10 and 11 accordingly and is pressed onto the workpiece 2 or the workpiece support table 3. According to the exemplary embodiment Fig. 1 so no other motor drives are provided to move or press the pressure beam 5. Reference number 31 denotes the motor controller known per se, which regulates or controls the electric motor 8.

Area B from Fig. 1 is now based on the 3 to 5 explained in more detail, wherein in the 3 to 5 the workpiece 2 is not shown. According to the perspective view Fig. 3 it can first be clearly seen that the electric motor 8 in this exemplary embodiment is arranged in the area of the pressure beam upright 6, here even in the pressure beam upright 6 or in a cavity of the pressure beam upright 6. He can, as in the 3 to 5 can be seen, especially in the further raised position of the pressure beam 5, protrude a little way up from the pressure beam upright 6. In the exemplary embodiment shown, the motor housing 23 of the electric motor 8 is in any case fixed on the pressure bar 5 such that the electric motor 8 is moved along with the pressure bar 5 when the pressure bar 5 is moved along the pressure bar uprights 6 and 7, that is to say in the directions 10 and 11. In the exemplary embodiment shown, the motor housing 23 is fixed to the pressure beam 5 for this purpose by means of the attachment housing 43 connected. The add-on housing 43 is passed through an opening 50 of the pressure beam upright 6, in order to be able to connect the pressure beam 5 arranged outside the pressure beam upright 6 to the electric motor 8 arranged inside the pressure beam upright 6.

According to the oblique view Fig. 4 the guide 20 can be seen clearly, with which the pressure beam 5 is mounted on the pressure beam support 6 so that it can be moved in the directions 10 and 11. In the exemplary embodiment shown, the guide 20 is composed of the guide carriage 39 fixed to the pressure beam 5 and the guide rail 40 fastened to the pressure beam upright 6. The guide carriages 39 are slidably guided on the guide rail 40, so that the pressure beam 5 can be guided in the directions 10 and 11 relative to the pressure beam upright 6. Of course, corresponding guides 20 could also be designed differently than shown here. Numerous possibilities are known in the prior art for this. In any case, the guide 20 is advantageously a linear guide, as shown here. On the pressure beam stand 6 is, as in the 3 and 4 the angle stop 22 is also clearly visible. In other words, the angle stop 22 in this exemplary embodiment is arranged on the pressure beam upright 6, in which the electric motor 8 is also located.

In the descriptions that follow, the essence is: Fig. 5 Referred. There are all of the components of the transfer mechanism of the plate dividing system 1 arranged and acting between the pressure beam 5 and the electric motor 8 for moving and guiding the pressure beam 5 along the pressure beam uprights 6 and 7 and thus also for pressing the workpiece 2 onto the workpiece support table 3 shown. First of all, the electric motor 8 is clearly visible. In this exemplary embodiment, it is an electric motor 8, which generates rotary movements of its output shaft 13, which is shown schematically here. In this embodiment, as in Fig. 5 Shown at least schematically, a step-up and / or step-down gear 21 in the form of a bevel gear is provided, which is arranged in the attachment housing 43 and in addition to the Angular translation of the rotational movement of the output shaft 13 converts the optimum rotational speed of the output shaft 13 for the electric motor 8 into the speed required for the movement and the pressing process by means of the pressure bar 5. On the output side of the step-up and / or step-down gear 21, there follows the drive gear, which is designed here as a rack and pinion gear 18. This rack and pinion gear 18 converts the rotary movement generated by the electric motor 8 into a movement of the pressure beam 5 in the respective directions 10 and 11. For this purpose, the rack and pinion gear 18 in the exemplary embodiment shown has the gear 42 which is driven by means of the electric motor 8 via the step-up and / or reduction gear 21 and which meshes with the rack 41 of the rack and pinion gear 18. In this exemplary embodiment, the toothed rack 41 is fastened in a fixed or stationary manner on the pressure beam stand 6, so that when the gear wheel 42 is rotated accordingly, the pressure beam 5 together with the attachment housing and electric motor 8 can be moved in the directions 10 and 11. In this way, a corresponding pressing of the workpiece 2 by means of the pressure bar 5 onto the workpiece support table 3 can also be realized.

In this exemplary embodiment, the electric motor 8 also drives a transmission shaft 24 of the plate dividing system 1 which runs along the pressure beam 5 from one of the pressure beam supports 6 to the other of the pressure beam supports 7. This is in the Fig. 5 and 1 good to see. In Fig. 1 It is illustrated that with correspondingly long transmission shafts 24, the transmission shaft 24 can be supported by means of a bearing 27 on the pressure beam 5.

In Fig. 1 in any case it can be clearly seen that in this exemplary embodiment a guide 20 for the pressure beam 5 along the pressure beam support 7 and also a drive gear in the form of a rack and pinion gear 18 are also provided on the pressure beam support 7. The rack and pinion gear 18 and the guide 20 on the pressure beam upright 7 are formed in this exemplary embodiment, like in other preferred embodiments, like the rack and pinion gear 18 and the guide 20 on the pressure beam upright 6. The gear 42 of the rack and pinion gear 18 on the pressure beam stand 7 is by means of Transmission shaft 24 rotated in the same manner as the gear 42 of the rack and pinion gear 18 on the pressure beam upright 6. As a result, the movement generated by the electric motor 8 is transmitted to both pressure beam uprights 6 and 7. As a result, the pressure beam 5 can be guided and driven particularly well on both pressure beam uprights 6 and 7 by means of a single electric motor 8. The transmission mechanism arranged and acting between the pressure bar 5 and the electric motor 8, here in particular between the pressure bar 5 and the output shaft 13 of the electric motor 8, comprises in this exemplary embodiment, as is particularly well shown in FIGS Fig. 1 and 5 What can be seen is the step-up and / or step-down gear 21, the rack and pinion gear 18 and guides 20 and the transmission shaft 24 arranged on the respective pressure beam uprights 6 and 7. As already explained at the beginning, this transmission mechanism is not self-locking in preferred embodiments of the invention , so that the pressure beam 5 follows gravity from a position distanced from the workpiece support table 3 in the direction 10 towards the workpiece support table 3 when the electric motor 8 is in the non-active state and the parking brake 12 explained below is in the release state. The overall efficiency of the transmission mechanism explained at the outset, which is preferably at least 80%, preferably at least 90% when the parking brake 12 is in the release state, results in this exemplary embodiment according to FIG Fig. 1 and 5 thus from the product of the partial efficiencies of the components of the transmission mechanism, in this case the step-up and / or step-down gear 21, the two rack and pinion gears 18, the two guides 20 and the transmission shaft 24, in particular also their storage in the bearing 27 and in particular to be able to lock it in its instantaneous position relative to the workpiece support table 3 when the electric motor 8 is in the non-active state is in the plate dividing system 1 of this first exemplary embodiment, as in particular in FIG Fig. 1 and 5 to see, according to the invention a parking brake 12 is provided for locking the pressure beam 5 in its respective instantaneous position relative to the workpiece support table 3. This parking brake 12 is at least between a locking state in which the pressure beam 5 is locked by the parking brake 12 in its respective instantaneous position relative to the workpiece, and a release state in which the pressure beam 5 by the parking brake 12 for moving along the pressure beam uprights 6 and 7 relative to the workpiece support table 3 and to Pressing the workpiece 2 in the area of the saw line 9 on the workpiece support table is released, switchable. In preferred embodiments, as already explained at the beginning, this is an automatically closing parking brake 12, in which it is provided that when the electric motor 8 is inactive it assumes the locked state. In this first embodiment, as in Fig. 1 and 5 to see this parking brake 12 integrated into the electric motor 8. In particular, it is also realized in this exemplary embodiment that the parking brake 12 acts at least in the locked state on the drive shaft 13 of the electric motor 8 with brake shoes or the like which are known per se but not shown in detail here. In addition, the position determination device 14 is also integrated in the electric motor 8 in this exemplary embodiment. In the variant shown here, this determines the current position of the pressure beam 5 relative to the workpiece support table 3 by measuring the movement of the drive shaft 13 of the electric motor 8, from which the current position of the pressure beam 5 can be derived. Electric motors 8 with corresponding parking brakes 12 and position determining devices 14 and a corresponding output shaft 13 are commercially available and, as such, are state of the art.

In order to avoid damage to the workpiece, as is also realized here, an elastic support 26 is arranged on the side of the pressure beam 5 in the workpiece support table 3 on the pressure beam 5. This can be designed in a manner known per se as a pressure sensor strip 17. It can serve as an intervention monitoring device 16 in order to recognize whether operating personnel 61 still accidentally have their hand or arm in the area between the pressure beam 5 and the workpiece 2 or the workpiece support table 3. This will be explained later using Fig. 22 explained in more detail. As already explained at the beginning, the pressure sensor bar 17 can also be used as an impact sensor with the it is recognized that the pressure beam 5 has hit the workpiece 2 during lowering.

The only one-sided provision of the single electric motor 8 in the area of only one of the pressure beam uprights 6 and in particular in or in the area of the pressure bar uprights 6 with the angle stop 22 may initially appear to be statically unfavorable to the person skilled in the art. But it has particularly in situations like those in Fig. 1 are shown, the advantage that a relatively narrow workpiece 2 which only extends over a partial area of the saw line 9 and which lies against the angle stop 22 can be optimally clamped. In the case of wider workpieces 2, which extend over the entire or a large part of the saw line 9, there are also no major disadvantages from the one-sided arrangement of the motor 8, since the pressure bar 5 and the corresponding parts of the transmission mechanism can be made correspondingly rigid.

Based on 6 to 9 Alternative embodiments are shown and explained below, which are in area B of the first embodiment Fig. 1 can also be used. Here, only the differences from the previously described first exemplary embodiment are discussed and otherwise reference is made to the above descriptions. In Fig. 6 the electric motor 8 is designed as a so-called torque motor. In this exemplary embodiment, it is shown that, in principle, an over- and / or reduction gear 21 can also be dispensed with, so that the output shaft 13 of the electric motor 8, here the electric torque motor 8, directly on the drive gear, here in the form of a rack and pinion gear 18 on the pressure beam upright 6 and can act via the transmission shaft 24 on the rack gear 18 arranged opposite on the pressure beam upright 7. According to these torque motors Fig. 6 The parking brake 12 and / or the position determining device 14 can be integrated in the electric motor 8.

In Fig. 7 An embodiment variant is shown in which the electric motor 8 in the form of an electric linear motor with a primary part 44 and a secondary part 45 is executed. The secondary part 45 is in the Fig. 7 example shown fixed to the pressure beam upright 6. The primary part 44 of the electric motor 8, which can be moved relative to it, is fixed in this example to the pressure beam 5 via the attachment housing 43, so that moving the primary part 44 along the secondary part 45 inevitably causes the gearwheel 42 in the attachment housing 43 to roll along the rack 41 thereof Rack and pinion gear 18 causes this rotary movement via the transmission shaft 24 to a corresponding, as in Fig. 1 shown, rack and pinion gear 18 is transmitted to the other pressure beam 7.

According to this embodiment Fig. 7 is shown as an example that the parking brake 12 does not necessarily have to be integrated directly into the electric motor 8. Rather, in this exemplary embodiment, this is an embodiment variant of a parking brake 12 fastened on the outside of the electric motor 8, which can be moved along a brake rail 46 in the released state. This brake rail 46 is fixed here on the pressure beam upright 6. In the locked state, the parking brake 12 engages the brake rail 46 in such a way that the pressure beam 5 is locked in its respective instantaneous position relative to the workpiece support table 3. For the sake of completeness, it is pointed out that corresponding parking brakes 12 also do not necessarily have to be connected directly to the electric motor 8. For example, it could also be provided to integrate corresponding parking brakes 12 in the guide 20 or to design them as completely separate components. In all of these embodiments, the parking brake 12 is preferably an automatically closing parking brake, which was already explained at the beginning.

In Fig. 7 the position determination device 14 is integrated as a linear measuring device in the electric motor 8. It is clear that even without integration into the electric motor 8, numerous possibilities are known in the prior art as to how appropriate position determination devices 14 can be designed independently of the electric motor 8 in order to measure or to the respective instantaneous position of the pressure beam 5 relative to the workpiece support table 3 determine.

In Fig. 8 The parking brake 12 and the position determining device 14 are in turn integrated into the electric motor 8. Here, the transmission mechanism provides, in addition to the rack and pinion gears 18, a spindle gear 19, which according to this exemplary embodiment Fig. 8 is formed from a fixed, ie non-rotating spindle 48 and a spindle nut 47 rotatably mounted thereon. The spindle 48 is fixed in terms of rotation and fixed in position by means of the spindle bearings 49 on the pressure beam upright 6. The spindle nut 47 is non-rotatably connected to a corresponding output shaft 13 of the electric motor 8, which is not explicitly shown here. The spindle 48 is in accordance with the exemplary embodiment Fig. 8 passed through a central opening in the electric motor 8. The motor housing 23 of the electric motor 8 is in Fig. 8 again fixed to the pressure beam 5 via an attachment housing 43. By turning the spindle nut 47 by means of the electric motor 8, the travel movements in the directions 10 and 11 of the pressure beam 5 are generated. The rack and pinion gear 18 and the transmission shaft 24 arranged between the two pressure beam supports 6 and 7 are used in this exemplary embodiment exclusively for the transmission of these movements in directions 10 and 11 or for pressing the pressure beam 5 onto a corresponding workpiece 2 on the workpiece Workpiece support table 3.

Fig. 9 shows another variant of a transmission mechanism with a spindle gear 19. Here, the motor housing 23 of the electric motor 8 is fixed on or on the pressure beam stand 6. The output shaft 13 drives the spindle 48, which is rotatably mounted in the spindle bearings 49, so that it is rotated in the spindle nut 47 fixed in the add-on housing 43 in this variant. In this variant, the rotary movement of the electric motor 8 thus means that the spindle nut 47 and the attachment housing 43 fixed on the pressure beam 5 and thus the pressure beam 5 can be moved in the directions 10 and 11, or the workpiece 2 by means of the pressure beam 5 Workpiece support table 3 can be pressed.

All these variants shown here by way of example according to the 6 to 9 can instead of in Fig. 1 and 5 variant shown in the first exemplary embodiment can be implemented in order to create further embodiment variants of the invention.

In the 10 and 11 Various cutting situations are shown with the pressure bar 5 according to the first exemplary embodiment. In Fig. 10 it is a trimming cut, in which the pressure beam 5 on one side of the saw line 9 or the saw 4 is only partially supported on the workpiece 2. Fig. 11 shows the situation in which the pressure beam 5 with its support surface facing the workpiece 2, here the elastic support 26, lies completely on the workpiece 2 during the sawing process.

In Fig. 12 an embodiment is shown in a section orthogonal to the saw line 9, in which two individual pressure bars 5 arranged one behind the other are provided as seen in the main transport direction 64. Together, these delimit a suction channel 38 which, as in FIG Fig. 1 can be sucked off via the suction connection piece 32. There is therefore a pressure bar 5 in front and a pressure bar 5 behind the saw line 9. Each pressure bar 5 is driven by its own electric motor 8 and its own transmission mechanism. The electric motors 8 and the transmission mechanisms driven by them in each case, that is to say the drive gears, such as the rack and pinion gears 19 shown here, and the guides 20 can otherwise be designed in a manner analogous to that of the exemplary embodiments illustrated hitherto. This also applies to the transmission of the rotary movement by means of the transmission shafts 24 to the other pressure beam upright 7. This variant according to Fig. 12 shows that the types of electrical drives of the pressure beams according to the invention can be used modularly for different task positions and configurations. For the functioning of the individual electric drives of the pressure beam 5, reference is made to the exemplary embodiments described above.

These two pressure bars 5, which could also be referred to as split pressure bars 5, can be used flexibly for making various cuts and in particular also for so-called dust cuts. Fig. 13 shows a so-called dust cut, in which very little material is removed on one side of the workpiece 2. In Fig. 13 one of the pressure bars 5 is pressed onto the workpiece 2, while the second pressure bar 5 is lifted upwards. Fig. 14 shows a position of the two pressure bars 5, in which the dust cut is carried out so that no dust and no chips are released to the outside. For this purpose, the second pressure bar 5, which does not rest on the workpiece 2, is moved all the way down to the workpiece support table 3, so that all the dust and all chips reach the suction channel 38 arranged between the two pressure bars 5 and not to the outside. Fig. 15 shows the situation in which both pressure bars 5 rest completely on the workpiece 2. 16 and 17 show the situations with a dust cut on the other side of the workpiece 2.

In Fig. 18 is a variant of Fig. 1 shown. In this variant, an electric motor 8 is provided in the area or directly in each of the pressure beam supports 6 and 7. The pressure bar 5 is thus driven by two electric motors 8. Both electric motors 8 are fixedly connected to the pressure beam 5 via their motor housing 23 and a corresponding add-on housing 43, so that they move with the pressure beam 5 in the directions 10 and 11 when the pressure beam 5 moves. The attachment and the transmission mechanisms of the respective electric motors 8 can, as shown in FIG 1 to 9 explained, be carried out in different versions. In this regard, reference can be made to the above statements. The two electric motors 8 and their transmission mechanisms are mechanically positively coupled via the transmission shaft 24, which leads to a mechanical standardization of the movements of the pressure beam 5 relative to the two pressure beam uprights 6 and 7. Otherwise, reference can be made to the description of the design variants mentioned.

Fig. 19 shows a modification of the variant according to Fig. 18 , in which the mechanical coupling by means of the transmission shaft 24 is dispensed with. The standardization of the movement of the electric motors 8 is implemented here by means of a corresponding regulation or control of both electric motors 8 via a single motor controller 31. Otherwise you can turn to the example using the 1 to 9 explained variants are referred to, which in Fig. 19 can also be applied accordingly. In an extended variant, not shown, too Fig. 19 one motor controller 31 is provided for each electric motor 8, these motor controllers 31 being coupled to one another for signaling purposes.

In Fig. 20 A variant of a plate dividing system 1 according to the invention is shown, in which two pressure bars 5 arranged one behind the other in the longitudinal direction of the saw line 9 are realized over a single saw line 9. In order to achieve this, in this variant an additional pressure beam upright 51 is attached or suspended from the guide beam 28. In addition to this, in contrast to the previously described exemplary embodiments, there is also an angular stop 22 on the pressure beam upright 7 in this exemplary embodiment Fig. 20 It is provided that one of the two pressure beams 5 is guided on the one hand on the pressure beam stand 6 and on the other hand on the pressure beam stand 51 via corresponding guides 20. The other of the pressure bars 5 is guided via corresponding guides 20 on the pressure bar upright 7 and on the pressure bar upright 51. Each of the two pressure bars 5 is driven by its own and by a single electric motor 8 for moving in the directions 10 and 11 and for pressing the workpiece 2 onto the workpiece support table 3. The components of the transmission mechanisms arranged on the one hand on the pressure beam upright 6 and on the pressure beam upright 51 and on the other hand on the pressure beam upright 7 and on the pressure beam upright 51, as well as the transmission shafts 24 provided in each case, can be seen in their own right, again as with reference to FIG 1 to 9 explained in different variants, so that this does not have to be explained again.

The methods explained at the outset can, in particular taking into account the in Fig. 22 The details shown, which will be explained further below, can be realized on all of the variants of plate dividing systems 1 shown here. Fig. 21 shows, by way of example, the course of the effective torque M of the electric motor 8 driving the pressure beam 5 as a function of the time t when the pressure beam 5 is lowered onto the workpiece 2 and when the workpiece 2 is subsequently pressed onto the workpiece support table 3. Phase 1, identified by reference number 52, is 1 the pressure beam 5 is raised by means of the electric motor 8 and is raised above the workpiece support table 3. The electric motor 8 must keep the dead weight of the pressure beam 5 with its effective torque in this phase. The lowering process begins in phase 2, identified by reference numeral 53, in which the pressure beam 5 is lowered in the direction 10 towards the workpiece support table 3 or the workpiece 2 lying there. In phase 3, marked 54, the lowering acceleration can be seen at the beginning of the lowering process. In phase 4, marked 55, the pressure beam 5 is lowered at a constant speed in the direction 10 toward the workpiece 2. In phase 5, marked 56, the pressure beam 5 hits the workpiece 2, which can be seen clearly in the course of the torque of the electric motor 8 is. In phase 6, marked 57, the pressure build-up on workpiece 2 begins up to the dead weight of pressure beam 5. In phase 7, marked 58, the load is reversed by eliminating the mechanical play in the transmission mechanism. In phase 8, identified by 59, a further pressure build-up takes place on the workpiece 2 by means of the pressure bar 5, in which the contact pressure is further increased by means of the electric motor 8 in addition to the dead weight of the pressure bar 5. In phase 9, identified by reference numeral 60, the workpiece 2 is then pressed onto the workpiece support table 3 by means of constant pressure. This one in Fig. 21 The course shown is one of many examples of how movements and the pressing of the pressure beam 5 by means of the electric motor 8 and the transmission mechanism equipped with a correspondingly high degree of efficiency can be specifically controlled and regulated by means of the invention. Almost any contact pressure curve can be realized. Instead of the effective torque, the current consumption of the electric motor 8 could also be used, for example, which would result in a corresponding curve.

In Fig. 22 the operating personnel 61 positioned behind the saw line 9, as seen in the main transport direction 64, is shown as an example. Also shows Fig. 22 also various known variants of intervention monitoring devices 16, as they can be used to monitor the intervention of the operating personnel 61 in the area between the pressure beam 5 and the workpiece 2 or workpiece support table 3 in order to be able to carry out the methods mentioned at the beginning.

These intervention monitoring devices 16 can be implemented in all of the previously described exemplary embodiments and also other variants of plate dividing systems 1 according to the invention, without this being shown in the figures discussed so far. This also applies to the cover 65 which, as is known per se in the prior art, shields the side of the pressure bar 5 which faces the operating personnel 61. These intervention monitoring devices 16 are always relevant when it is a plate dividing system 1 in which the workpieces in the area of the saw line 9 or the pressure beam 5 are exclusively or at least manually manipulated by the operating personnel 61. In the case of fully automatic plate dividing systems 1, these safety devices can also be omitted.

The first intervention monitoring device 16 is shown in FIG Fig. 22 a slat curtain 62 known per se is shown, the slats of which, as is known per se, preferably open automatically when the saw 4 and the scoring saw 34, if any, have reached their securing position before the operating personnel 61 reach the area of the pressure beam 5 by hand or with their whole arm and the saw line 9 can intervene. An intervention monitoring device 16 can be created by monitoring the position of the slats of the slat curtain 62. A second variant of an intervention monitoring device 16 is formed by the safety bar 63, which in this exemplary embodiment is at the top is pivoted when a hand or an arm or other object is in the area immediately in front of the pressure beam 5. Favorably, this safety bar 63, viewed in the main transport direction 64, is arranged behind the saw line 9 and thus behind the pressure beam 5 and thus on the side on which the operating personnel 61 are located. Preferred design variants of the safety bar 63 can recognize in particular the substantially wedge-shaped shape of the hand and arm of the operating personnel. This is known per se. The third variant of the intervention monitoring device 16 is in FIG Fig. 22 also the design of the elastic pad 26 is drawn as a pressure sensor strip 17. This can also be used to detect when the hand or arm of the operating personnel 61 is still in the area of the saw line 9 when the pressure bar 5 is lowered. In addition, of course, other intervention monitoring devices 16 known per se in the state of the art can also be used in the plate dividing systems 1 and the methods for operating them to determine a manual intervention by the operating personnel 61 in the area between the pressure beam 5 and the workpiece support table 3.

In Fig. 22 the safety position sensor 15 is also shown schematically, with which it can be determined independently of the position determining device 14 whether the pressure bar 5 is in a predetermined safety position at a distance above the workpiece support table 3 and / or the workpiece 2. Such safety position sensors 15 are known per se, so that they are in Fig. 22 are only shown schematically.

Legend for the reference numbers:

1 Panel slicer 26 elastic pad 2nd workpiece 27 storage 3rd Workpiece support table 28 Leadership 4th saw 29 Alignment car 5 Pressure bar 30th Aligning cams 6 Pressure beam stand 31 Engine governor 7 Pressure beam stand 32 Suction connector 8th Electric motor 33 Saw carriage 9 Saw line 34 Scoring saw 10th direction 35 Feed device 11 direction 36 Klemmer 12th Parking brake 37 Feed device 13 Output shaft 38 Suction channel 14 Positioning device 39 Carriage 40 Guide rail 15 Safety position sensor 41 Rack 16 Intervention monitoring device 42 gear 43 Extension housing 17th Pressure sensor bar 44 Primary part 18th Rack and pinion gear 45 Secondary part 19th Spindle gear 46 Brake rail 20th guide 47 Spindle nut 21 Reduction and reduction gears 48 spindle 49 Spindle bearing 22 Angle stop 50 opening 23 Motor housing 51 Pressure beam stand 24th Transmission wave 52 Phase 1 25th Support level 53 Phase 2 54 Phase 3 55 Phase 4 56 Phase 5 57 Phase 6 58 Phase 7 59 Phase 8 60 Phase 9 61 Operating personnel 62 Slat curtain 63 Safety bar 64 Main direction of transport 65 cover

Claims (23)

Panel dividing system (1) for sawing at least one workpiece (2) consisting of at least one single panel or at least one stack of panels, the panel dividing system (1) having at least one workpiece supporting table (3) and at least one saw (4) and at least one pressure bar (5) and Has at least two pressure beam uprights (6, 7) and at least one electric motor (8), the saw (4) for sawing the workpiece (2) lying on the workpiece support table (3) can be moved along a saw line (9) of the workpiece support table (3) and the pressure beam (5) on the pressure beam uprights (6, 7) in the direction (10) towards the workpiece support table (3) and in the direction (11) away from the workpiece support table (3) and the electric motor (8) for executing the travel movements the pressure beam stand (6, 7) and for pressing the workpiece (2) in the area of the saw line (9) to the workpiece support table (3), characterized in that the Plate dividing system (1) has a parking brake (12) for locking the pressure beam (5) in its respective instantaneous position relative to the workpiece support table (3), the parking brake (12) at least between a locking state in which the pressure beam (5) is detached from the parking brake ( 12) is locked in its respective instantaneous position relative to the workpiece support table (3), and a release state in which the pressure bar (5) from the parking brake (12) for moving along the pressure bar stand (6, 7) relative to the workpiece support table (3) and Pressing the workpiece (2) in the area of the saw line (9) on the workpiece support table (3), preferably completely, is released, can be switched. Plate dividing system (1) according to claim 1, characterized in that the parking brake (12) is an automatically closing parking brake in which it is preferably provided that, when the electric motor (8) is inactive, it forcibly assumes the locked state. Plate dividing system (1) according to claim 1 or 2, characterized in that the parking brake (12) is integrated in the electric motor (8) and / or that the parking brake (12) at least in the locked state on an output shaft (13) of the electric motor (8) acts. Plate dividing system (1) according to one of claims 1 to 3, characterized in that the plate dividing system (1) has a position determining device (14) for determining the respective instantaneous position of the pressure beam (5) relative to the workpiece support table (3). Plate dividing system (1) according to claim 4, characterized in that the position determining device (14) is integrated in the electric motor (8), preferably measures the movement of one or the output shaft (13) of the electric motor (8). Plate dividing system (1) according to one of claims 1 to 5, characterized in that the pressure bar (5) can be moved into a safety position provided for the manipulation of the workpiece (2) by operating personnel (61) and distant from the workpiece support table (3), and the plate dividing system (1) has a safety position sensor (15) for determining whether the pressure bar (5) is in the safety position. Plate dividing system (1) according to one of Claims 1 to 6, characterized in that the plate dividing system (1) has at least one intervention monitoring device (16) for determining manual intervention by operating personnel (61) in an area between the pressure bar (5) and the workpiece support table ( 3), wherein it is preferably provided that the intervention monitoring device (16) is located on a is the side of the pressure bar (5) facing the workpiece support table (3) on the pressure bar (5) arranged pressure sensor bar (17). Plate dividing system (1) according to one of Claims 1 to 7, characterized in that the pressure bar (5) lowers following gravity from a position distanced from the workpiece support table (3) in the direction (10) towards the workpiece support table (3) when the Electric motor (8) is in the inactive state and the parking brake (12) is in the release state. Plate dividing system (1) according to one of Claims 1 to 8, characterized in that between the pressure bar (5) and the electric motor (8), preferably between the pressure bar (5) and one or the output shaft (13) of the electric motor (8) , a transmission mechanism of the plate dividing system (1) for moving and guiding the pressure beam (5) along the pressure beam uprights (6, 7) and for pressing the workpiece (2) in the area of the saw line (9) onto the workpiece support table (3) and / or acts and the transmission mechanism has an overall efficiency of at least 80%, preferably of at least 90%, when the parking brake (12) is in the release state. Plate dividing system (1) according to claim 9, characterized in that the transmission mechanism at least one drive gear, preferably rack and pinion gear (18) or spindle gear (19), for converting the movement generated by the electric motor (8) into a movement of the pressure beam (5) along the pressure beam upright (6, 7) and / or pressing the workpiece (2) in the area of the saw line (9) onto the workpiece support table (3) and at least one guide (20) for guiding the pressure beam (5) along the pressure beam uprights (6, 7 ) includes. Plate dividing system (1) according to claim 10, characterized in that the transmission mechanism additionally an over and / or Reduction gear (21) for increasing and / or reducing the movement generated by the electric motor (8). Plate dividing system (1) according to one of claims 1 to 11, characterized in that the pressure bar (5) of the plate dividing system (1) or each pressure bar (5) of the plate dividing system (1) for executing the movement of the pressure beam (5) along the pressure beam upright ( 6, 7) and for pressing the workpiece (2) in the area of the saw line (9) against the workpiece support table (3) by means of the pressure bar (5) by exactly one electric motor (8) as the only motor drive unit. Panel dividing system (1) for sawing at least one workpiece (2) consisting of at least one single panel or at least one stack of panels, the panel dividing system (1) having at least one workpiece supporting table (3) and at least one saw (4) and at least one pressure bar (5) and Has at least two pressure beam uprights (6, 7) and at least one electric motor (8), the saw (4) for sawing the workpiece (2) lying on the workpiece support table (3) can be moved along a saw line (9) of the workpiece support table (3) and the pressure beam (5) on the pressure beam uprights (6, 7) in the direction (10) towards the workpiece support table (3) and in the direction (11) away from the workpiece support table (3) and the electric motor (8) for executing the travel movements the pressure beam stand (6, 7) and for pressing the workpiece (2) in the area of the saw line (9) to the workpiece support table (3) is driven, in particular according to one of the claims Kitchen 1 to 12, characterized in that the electric motor (8) or each electric motor (8) is arranged in the area of one of the pressure beam uprights (6, 7), preferably in one of the pressure beam uprights (6, 7). Panel dividing system (1) according to claim 13, characterized in that on this pressure beam stand (6, 7) or at least between this pressure beam stand (6, 7) and the saw line (9) an angle stop (22) Plate dividing system (1) for aligning the workpiece (2) is arranged on the workpiece support table (3). Plate dividing system (1) according to one of claims 1 to 14, characterized in that the electric motor (8) has a motor housing (23) and the motor housing (23) is fixed to the pressure beam (5) such that the electric motor (8) during the process of the pressure beam (5) is moved along with the pressure beam stand (6, 7) with the pressure beam (5). Plate dividing system (1) according to one of Claims 1 to 15, characterized in that the electric motor (8) has a transmission shaft (24) running along the pressure beam (5) from one of the pressure beam supports (6, 7) to the other of the pressure beam supports (6, 7) ) drives the plate dividing system (1). Method for operating a plate dividing system (1) according to one of claims 1 to 16, characterized in that when the electric motor (8) is inactive, the parking brake (12) is forcibly brought into the locked state. Method for operating a plate dividing system (1) according to one of claims 1 to 16, characterized in that the pressure bar (5) moves into a safety position provided for the manipulation of the workpiece (2) by operating personnel and distanced from the workpiece support table (3) and there by means of of the electric motor (8) or the parking brake (12) is held when at least one or the intervention monitoring device (16) detects manual intervention by the operating personnel (61) in the area between the pressure bar (5) and the workpiece support table (3) . Method for operating a panel sizing system (1) according to one of Claims 1 to 16, characterized in that when a sawing process is interrupted, the saw (4) is brought into a securing position and then the pressure bar (5) is moved into a position for manipulating the workpiece (2). by Operating personnel (61) move the safety position provided and distant it from the workpiece support table (3) and hold it there by means of the electric motor (8) or the parking brake (12). Method for operating a plate dividing system (1) for sawing at least one workpiece (2) consisting of at least one individual plate or at least one plate stack, the plate dividing system (1) having at least one workpiece support table (3) and at least one saw (4) and at least one pressure beam (5) and at least two pressure beam uprights (6, 7) and at least one electric motor (8), the saw (4) for sawing the workpiece (2) lying on the workpiece support table (3) along a saw line (9) of the workpiece support table ( 3) is moved and the pressure beam (5) on the pressure beam uprights (6, 7) is guided in the direction towards the workpiece support table (3) and in the direction (10) away from the workpiece support table (3) and by the electric motor (8) to execute the Movements along the pressure beam uprights (6, 7) and for pressing the workpiece (2) in the area of the saw line (9) against the workpiece support table (3), in particular Special method for operating a plate dividing system (1) according to one of claims 1 to 16, characterized in that the following sequence of method steps is carried out: a) positioning the workpiece (2) on the workpiece support table (3) and the saw line (9), the pressure bar (5) being arranged at a distance from the workpiece support table (3) during this positioning; b) lowering the pressure beam (5) in the direction (10) towards the workpiece (2); c) stopping the pressure bar (5) when it hits the workpiece (2) or in a predeterminable position before the pressure bar (5) hits the workpiece (2); d) applying a predefinable target contact pressure or target contact pressure profile by means of the pressure bar (5) to the workpiece (2) and sawing the workpiece (2) by means of the saw (4) along the saw line (9); e) lifting the pressure beam (5) from the workpiece (2). Method according to claim 20, characterized in that in method step b) a speed with which the pressure bar (5) is lowered in the direction (10) towards the workpiece (2), depending on the workpiece (2) and / or an operating state or at least one parameter of the plate dividing system (1) is specified. Method according to claim 20 or 21, characterized in that in method step c) the impact of the pressure bar (5) on the workpiece (2) is detected by measuring an operating parameter of the electric motor (8) or by means of a separate impact sensor, or that a position of the pressure beam (5), which is used as the predeterminable position before the pressure beam (5) hits the workpiece (2), is known from a previous sawing process. Method according to one of Claims 20 to 22, characterized in that, in method step d), the predeterminable target contact pressure or target contact pressure curve is predetermined as a function of the workpiece (2) and / or of a position of the saw (4) along the saw line (9).

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