EP4245448A2 - Panel partitioning facility - Google Patents

Abstract

Panel dividing system (1) for sawing at least one workpiece (2), the panel 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 supports (6, 7) and has at least one electric motor (8), the saw (4) being movable along a sawing line (9) of the workpiece support table (3) for sawing the workpiece (2) and the pressure beam (5) being movably mounted on the pressure beam supports (6, 7). and is driven by the electric motor (8) to carry out the traversing movements along the pressure beam supports (6, 7) and to press the workpiece (2) in the area of the sawing line (9) onto the workpiece support table (3), the panel dividing system (1) having a parking brake (12) for locking the pressure beam (5) in its respective current position relative to the workpiece support table (3), the parking brake (12) being switchable at least between a locking state and a release state.

Description

The present invention relates to a panel dividing system for sawing at least one workpiece consisting of at least one individual panel or at least one stack of panels, the panel dividing system having at least one workpiece support table and at least one saw and at least one pressure beam and at least two pressure beam supports and at least one electric motor, the saw for Sawing the workpiece lying on the workpiece support table can be moved along a sawing line of the workpiece support table and the pressure beam is mounted on the pressure beam supports so that it can move in the direction towards the workpiece support table and in the direction away from the workpiece support table and by the electric motor for carrying out the traversing movements along the pressure beam supports and for pressing the workpiece in the area the sawing line is driven to the workpiece support table. In addition, the invention also relates to methods for operating such panel dividing systems.

From the EP 2 233 236 B1 It is known to operate a pressure beam of a plate dividing system using a type of hybrid drive, which includes both an electric motor and a pneumatic drive.

From the generic DE 20 2008 002 323 U1 A plate dividing system is known in which the pressure beam is driven exclusively by an electric motor. Specifically shown in this document are variants in which the electric motor is below the workpiece support table is attached to drive two spindles. Alternatively, this document also suggests arranging a motor in the pressure beam itself in order 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 proposes to make the transmission mechanisms, in particular the spindle gears shown, 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 move down onto the workpiece support table in an uncontrolled manner. It should be borne in mind that panel dividing systems are safety-relevant systems in which the operating personnel must be adequately protected from possible sources of injury, including the pressure beam.

The object of the invention is to improve a panel dividing system of the type mentioned above in such a way that the movement when moving the pressure beam along the pressure beam supports and the pressing of the workpiece in the area of the saw line against the workpiece support table can be controlled and/or regulated as well and as finely coordinated 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 being at least between a locking state in which the pressure beam is locked by the parking brake in its respective instantaneous position relative to the workpiece support table, and a release state , in which the pressure beam is moved by the parking brake along the pressure beam stay relative to the workpiece support table and for pressing the workpiece in the area of the saw line against the workpiece support table, preferably completely, is released, can be switched.

With the additionally provided parking brake, the panel dividing system according to the invention has an additional safety feature with which the pressure bar can be securely held in its current position whenever the electric motor is in the inactive state, so that the panel dividing system ensures that uncontrolled Movements of the pressure beam and in particular an uncontrolled lowering of the pressure beam onto the workpiece support table are prevented. Due to the parking brake provided according to the invention, a self-locking design of the transmission mechanism arranged and/or acting between the electric motor and the pressure beam for movement and guidance along the pressure beam supports and for pressing the pressure beam can be dispensed with. Due to this non-self-locking design of the transmission mechanism, which is possible contrary to the teachings of the prior art, the mechanical resistances to be overcome by means of the electric motor when moving and pressing the pressure beam are much lower than in the prior art, so that the movement of the pressure beam towards 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 by means of the pressure bar can be regulated and/or controlled much more finely and precisely than in the prior art.

In preferred embodiments, the parking brake can be in any current position, i.e. the current position of the Pressure beam can be brought into the locking state relative to the workpiece support table, so that the pressure beam can be locked in any instantaneous position using the parking brake. In the release state it is provided that the parking brake releases the pressure bar, preferably completely. Fully releasing means that the parking brake does not exert any braking effect on the pressure bar in the released state. Alternatively, 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 bar can be moved or moved along the pressure bar supports relative to the workpiece support table despite this residual braking effect. In any case, the current position is understood to mean the respective position of the pressure beam relative to the workpiece support table, which it currently occupies. When moving along the pressure beam supports, the pressure beam changes its current position.

In preferred embodiments of the invention it is provided that the electric motor or motors are the only motor drives for moving the pressure beam along the pressure beam supports and for pressing the workpiece in the area of the sawing line onto the workpiece support table. In other words, it is therefore provided that it is a purely electrically operated pressure bar, i.e. that there are no additional pneumatic or other motor drives 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 serves exclusively to a movement already generated by the motor drive transferring, translating and the like.

It is therefore preferably provided that the pressure beam of the panel dividing system or each pressure beam of the panel dividing system is driven by exactly one electric motor as a single motor drive unit by means of the pressure beam to carry out the traversing movements of the pressure beam along the pressure beam supports and to press the workpiece in the area of the saw line to the workpiece support table.

Preferred variants provide that the parking brake is an automatically closing parking brake. Conveniently, this is a parking brake, which forcibly and preferably automatically assumes the locking state when the electric motor is not active. The inactive state of the electric motor could also be referred to as the passive state of the electric motor. This refers to all the states in which the electric motor exerts no or currently insufficient forces on the pressure beam in order to hold the pressure beam 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 voltage-free 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, their task is to brake moving masses or loads from movement if necessary and then hold them securely when they are at a standstill. The parking brake preferably draws the braking force from a preloaded element, such as a spring or another, for example, hydraulic or pneumatic pressure accumulator. 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 . When there is no energy, they are always closed. Corresponding automatically closing parking brakes are used in the state of the 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 energy supply line or failure of the motor drive to open the brake, the braking force is retained and thus the automatically closing parking brake remains in its locked state. This ensures the required braking effect even in unfavorable conditions and operational disruptions.

For the sake of completeness, it should be noted that with the parking brakes according to the invention it can of course also be provided that, in addition to the locking state and the release state, they can implement various 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 be present, so to speak, as an additional component in addition to the electric motor. However, particularly preferred variants of the invention provide that the parking brake is integrated into the electric motor. It can be provided that the parking brake is at least in Locking state acts on an output shaft of the electric motor. 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 therefore the component of the electric motor with which the movement generated by the electric motor, in particular rotational movement, is transmitted to the transmission mechanism.

Preferred variants of panel dividing systems according to the invention provide that the panel 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, i.e. the current position of the pressure beam, can conveniently be determined at any time during operation of the plate dividing system.

Favorable variants of the invention provide that the position determining device is integrated into the electric motor. It is particularly advantageous 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.

Panel dividing systems according to the invention can be designed so that they work fully automatically. In these cases, the workpieces are known per se Feed devices, transport devices and the like are moved and positioned fully automatically, so that no operating personnel are necessary to manipulate the workpiece in the area of the panel dividing system. In panel dividing systems according to the invention, it can also be provided that workpieces are fed or re-fed or removed from the sawing line, at least in part, by hand by operating personnel. With 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 panel dividing system according to the invention provide that the pressure beam can be moved into a safety position intended for the manipulation of the workpiece by operating personnel and distanced from the workpiece support table, and the panel dividing system has a safety position sensor for determining whether the pressure bar is in the safety position. It can then be provided that the workpiece is manipulated by the operating personnel only when the pressure bar is in its safety position, which can be monitored by the safety position sensor. In the interests of a high level of operational safety in panel dividing systems, in which the workpieces are also manipulated by operating personnel in the area of the panel dividing system, it is also advantageously provided that the panel dividing system has at least one intervention monitoring device for detecting manual intervention by operating personnel in an area between the pressure beam and the workpiece support table . Suitable intervention monitoring devices are known in the prior art for panel dividing systems. The intervention monitoring device can, for example, be one facing the workpiece support table Act on the pressure sensor strip arranged on the side of the pressure bar. Other suitable intervention monitoring devices are, for example, known slatted curtains, which must be specifically opened by the operating personnel in order to get into the area of the pressure beam and the saw line. Another intervention monitoring device can also be a safety strip, for example. The pressure sensor strip as well as the safety strip are conveniently designed in such a way that they detect an arm or a hand of the operating personnel, which is or are accidentally arranged between the pressure beam and the workpiece or the pressure beam 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 slatted curtain and/or the safety bar are conveniently arranged at a distance 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. Seen in a main transport direction, in which the workpieces are fed to the sawing line by a known feed device of the panel dividing system, this area lies behind the sawing line. The safety strip can be attached directly to the pressure beam and protrude from it in the direction mentioned. In panel 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 makes it possible for 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 can move as much as possible and when it is pressed onto the workpiece to be sawn and/or the workpiece support table can be precisely controlled or regulated. In this sense, in panel dividing systems according to the invention, it is conveniently provided that the pressure beam lowers, following gravity, from a position distanced from the workpiece support table in the direction of 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 possible control or regulation, 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 sawing line is arranged and/or acts on the workpiece support table 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 includes all the components that are used to transmit the movement generated by the electric motor and to convert this movement into the movement of the pressure beam and into the pressing of the workpiece in the area of the sawing line against the workpiece support table. In other words, the transmission mechanism includes all the in particular moving components which are provided to convert the movement generated by the electric motor into a corresponding movement or pressing of the pressure bar. The overall efficiency of the transmission mechanism results from all the efficiencies of the components that make up the transmission mechanism, 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 found in the specialist literature, so that the overall efficiency of the transmission mechanism is, as is known, calculated from the product of the partial efficiencies of all components of the transmission mechanism. The overall efficiency of the transmission mechanism is always smaller than the individual partial efficiencies of the individual components of the transmission mechanism. Since the electric motor and its possible drive shaft are not part of the transmission mechanism, the efficiency of the electric motor and also 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 mathematical determination of the overall efficiency from information provided by the manufacturer of the individual components and/or from the relevant specialist literature, the overall efficiency of the transmission mechanism can also be determined using measurements. To do this, you can have the pressure bar perform a lifting and a lowering movement at a slow, constant travel speed of, for example, 10 mm/s (millimeters per second) and record the effective torque transmitted by the electric motor, in particular its drive shaft. Commercially available control devices for electric motors provide this effective torque of the electric motor or the drive shaft is available as standard, so that the corresponding values of the effective torques can be easily read. Alternatively, it is of course also possible to use known measuring devices to determine this effective torque during the aforementioned lifting and lowering movement. The lifting movement is a movement of the pressure beam along the pressure beam supports in the direction away from the workpiece support table. This lowering movement is a movement of the pressure beam along the pressure beam supports towards the workpiece support table. The overall efficiency of the transmission mechanism is then calculated, as is generally known, from the root of the quotient of the effective torque during the lowering movement by the effective torque during the lifting movement. The efficiency can therefore be determined using the following formula: $$\begin{array}{l}\mathit{Overall\; efficiency}\\ =\\ \sqrt{\frac{\mathit{effective\; moment}\mathit{at}\mathit{the}\mathit{Lowering\; movement}\mathit{with}\mathit{more\; constant}\mathit{Travel\; speed}}{\mathit{effective\; moment}\mathit{at}\mathit{the}\mathit{Lifting\; movement}\mathit{with}\mathit{more\; constant}\mathit{Travel\; speed}}}\end{array}$$

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

The transmission mechanism mentioned can have various 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 supports and/or into pressing the workpiece in the area of the sawing line against the workpiece support table and at least one guide for guiding the pressure beam along the pressure beam supports. The drive gear converts the movement generated by the electric motor into a corresponding movement of the pressure beam along the pressure stays and/or into pressing the workpiece in the area of the sawing line against the workpiece support table. The drive gear can, for example, have or consist of a rack 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 supports during its movement along the pressure beam supports and when the workpiece is pressed in the area of the saw line onto the workpiece support table. The leadership could also be referred to as a management institution.

Depending on the type of electric motor used, it can be provided that the transmission mechanism additionally has a step-up and/or reduction gear for step-up and/or step-down of the movement generated by the electric motor. This transmission and/or reduction 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 for moving or pressing the pressure bar are achieved. The transmission and/or reduction gear is conveniently arranged, if necessary, between the electric motor and the drive gear.

A further aspect of the invention also relates to a panel dividing system for sawing at least one workpiece consisting of at least one individual panel or at least one stack of panels, the panel dividing system having at least one workpiece support table and at least one saw and has at least one pressure beam and at least two pressure beam supports and at least one electric motor, wherein the saw for sawing the workpiece lying on the workpiece support table can be moved along a sawing 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 stored and driven by the electric motor to carry out the traversing movements along the pressure beam supports and to press the workpiece in the area of the sawing line to the workpiece support table.

The aim of this aspect of the invention is to arrange the electric motor in such a way that the transmission mechanism to the pressure beam can be designed as simply and efficiently as possible.

To solve this problem, 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 supports, preferably in one of the pressure beam supports.

This can be viewed both in connection with the other invention already described here, but also as a separate invention. By arranging the electric motor or motors in the area of one of the pressure beam supports, the transmission mechanism can be designed very efficiently. 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, for example, partially move out of the pressure beam stand when the pressure beam has moved to the position furthest away from the workpiece support table protrude.

It is particularly advantageous in this context that the pressure beam or each pressure beam is driven by exactly one electric motor as a single motor drive unit. In these embodiments, the electric motor is then only located in one of the pressure bar supports assigned to the pressure bar for each pressure bar. This embodiment appears disadvantageous at first glance, since the person skilled in the art initially fears an asymmetrical pressure distribution when pressing the pressure bar onto the workpiece. However, this apparent disadvantage can be compensated for by appropriate rigidity of the pressure beam and the drive gear associated with it. A significant advantage of this one-sided arrangement of the electric motor is that a particularly favorable pressure distribution results when the pressure bar is only intended to press narrow workpieces onto the workpiece support table on one side, namely on the side of the electric motor. An angle stop of the panel dividing system for aligning the workpiece on the workpiece support table is conveniently arranged on this pressure beam stand, in its area or in which the electric motor is located, or at least between this pressure beam stand and the saw line. 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 in the area or in just one of the pressure beam supports can fully develop. In contrast to the prior art mentioned at the beginning, the electric motor or each electric motor is conveniently arranged outside the pressure beam. This creates space for devices arranged and/or movable along the pressure beam, such as an alignment carriage and/or components Extraction system created 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 beam in such a way that the electric motor is moved along with the pressure beam when the pressure beam is moved along the pressure beam uprights. For this purpose, the motor housing of the electric motor can be fixed to the pressure beam via an attachment housing, for example. Components of the transmission mechanism, for example, can then be accommodated in the add-on housing.

Preferred embodiments of the invention provide that the electric motor drives a transmission shaft of the plate dividing system that runs 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 a rack and pinion gear and/or a spindle gear, on both pressure beam supports assigned to a single pressure beam. These two drive gears can be mechanically coupled to one another via the transmission shaft. The transmission shaft can, for example, serve to transmit the movement generated by a single electric motor, which is arranged in the area or in only one of the pressure beam supports, via the transmission mechanism with the transmission shaft to both drive gears arranged on one of the pressure beam supports. The transmission shaft also ensures a uniform movement of the pressure beam relative to both pressure beam supports. A corresponding transmission shaft can also be used if two electric motors are assigned to the pressure beam are, which are each arranged in the area or in one of the pressure beam supports. In this case, the transmission shaft can be used as a mechanical coupling to standardize the movement, i.e. to synchronize the drive gears arranged on one of the pressure beam supports.

A method for operating a panel dividing system according to the invention preferably provides that the parking brake is forcibly brought into the locking state when the electric motor is not active. This ensures that uncontrolled movement of the pressure beam is always reliably avoided when the electric motor is in the inactive state, for example switched off, defective, de-energized, not energized or the like. This prevents unwanted movement, especially falling of the pressure beam, so that the panel dividing system itself is protected from damage and any operating personnel present are protected from injury.

A method for operating a panel dividing system according to the invention can also provide that the pressure beam is moved into a safety position intended for the manipulation of the workpiece by operating personnel and distanced 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 is detected in the area between the pressure beam and the workpiece support table. The safety of the operating personnel is the priority here. With this procedure it is intended that the operating personnel only enter the area between the The pressure beam and the workpiece support table can or should reach into it when the pressure beam has moved into the safety position distanced from the workpiece support table. To detect manual intervention by the operating personnel in the area between the pressure beam and the workpiece support table, the intervention monitoring devices mentioned above can be implemented individually or in combination as part of the panel 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 mentioned at the beginning. However, the safety position sensor is conveniently provided as an additional safety feature, which monitors independently of the position determination device that the pressure bar is in the safety position.

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

The pressure beam can also move to the safety position if, for example, a disruption causes a sawing process to be aborted. In this context, a method for operating an inventive Panel dividing system provides that when a sawing process is aborted, the saw is brought into a safety position and then the pressure bar is moved into the or a safety position intended for the manipulation of the workpiece by operating personnel and distanced from the workpiece support table and is held there by means of the electric motor or the parking brake. A securing position of the saw can be achieved, for example, by lowering the saw into an area below the workpiece support table. Another securing position can be achieved by moving the saw laterally out of the area of the pressure beam along the sawing 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 panel dividing system for sawing at least one workpiece consisting of at least one individual panel or at least one stack of panels, the panel dividing system having at least one workpiece support table and at least one saw and at least one pressure beam and at least two pressure beam supports and at least has an electric motor, wherein the saw for sawing the workpiece lying on the workpiece support table is moved along a sawing line of the workpiece support table and the pressure beam is moved on the pressure beam supports in the direction towards the workpiece support table and in the direction away from the workpiece support table and is moved along by the electric motor to carry out the traversing movements the pressure beam stand and is driven to press the workpiece in the area of the saw line onto the workpiece support table. This method can be used to operate panel sizing systems of the types mentioned above and can thus be implemented using these panel sizing systems. However, such a procedure can also be used as an independent aspect or be used as an independent invention to operate other panel dividing systems with the features mentioned in this paragraph. The aim of this process is to provide a procedure that is as effective as possible and as well adapted to the requirements of the workpiece to be sawn and the respective panel sizing system. For this purpose, this procedure requires the following sequence of procedural steps to be carried out:

1. a) positioning the workpiece on the workpiece support table and the saw line, the pressure beam 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 beam when it hits the workpiece or in a predeterminable position before the pressure beam hits the workpiece;
4. d) applying a predeterminable target pressure or target pressure curve to the workpiece using the pressure bar and sawing the workpiece using the saw along the sawing line;
5. e) Lifting the pressure beam off the workpiece.

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

When positioning the workpiece, it is preferably provided that the workpiece is placed on or against the angle stop. The positioning can be done mechanically, for example using known feed devices and/or alignment carriages of the panel dividing system. The positioning of the workpiece can also be carried out by manual manipulation by the operating personnel.

In method step d) both a constant target contact pressure and a target contact pressure curve can be provided. In the latter case, the target contact pressure varies in a predetermined manner during the sawing of the workpiece. For example, different target contact pressures can be provided depending on the position of the saw along the sawing line. Conveniently, a regulation of the actual contact pressure, i.e. the actual contact pressure, to the target contact pressure or the target contact pressure curve is provided. For example, the instantaneous current consumption and/or the instantaneous effective torque of the electric motor driving the pressure beam or of the electric motors driving the pressure beam can be used as a controlled variable. Alternatively or additionally, the respective actual contact pressure can be measured as a controlled variable using a corresponding pressure sensor. The pressure sensor can be, for example, the pressure sensor strip already explained at the beginning, which is arranged on the pressure beam on a side of the pressure beam facing the workpiece support table. It is preferably provided that in method step d) the predeterminable target contact pressure or target pressure curve is specified depending on the workpiece and/or on a position of the saw along the sawing line. For example, it is possible to determine the target contact pressure or The target contact pressure curve takes into account the material and / or the geometric dimensions of the workpiece, the position of the workpiece along the sawing line. The target contact pressure can also provide different target contact pressures for different positions of the saw along the saw line in the sense of a target contact pressure curve. For example, it is conceivable to provide a different target contact pressure when the saw enters and/or exits into and/or out of the workpiece than when the saw is already in the workpiece and continues to saw the workpiece. The target contact pressure or target pressure curve can also be carried out depending on the cutting sequence and/or the required cutting quality. The contact pressure is conveniently regulated throughout the entire cutting process using appropriate specifications of target contact pressures and target contact pressure curves.

In method step b), it is conveniently provided that a speed at which the pressure bar is lowered in the direction of the workpiece is specified and preferably also monitored depending on the workpiece and / or depending on an operating state or at least one parameter of the plate dividing system. In process step b), regulation of the speed can therefore be provided. The actual speed can be determined, for example, via the position determination device already mentioned at the beginning and a corresponding time measurement. The target speeds can be determined, for example, depending on parameters of the workpiece such as its material and size or from operating states and/or parameters of the panel dividing system such as the required cutting quality, the cutting sequence, etc. By specifying a corresponding target speed curve, you can: Different parts of the movement also have different target speeds. For example, it is possible to lower the pressure bar quickly at 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 include, for example, its current consumption, its effective torque or the like. For example, the pressure sensor strip already mentioned above on the side of the pressure beam facing the workpiece support table can be used as an impact sensor. Alternatively, in method step c), a position of the pressure bar known from a previous sawing process can be used as the predeterminable position before the pressure bar hits the workpiece. If the dimensions of the workpiece and in particular its thickness in the direction normal to the workpiece support table are known from previous sawing processes, the position at which the pressure bar stops can be specified so that the pressure bar stops shortly or immediately before the pressure bar hits the workpiece is stopped accordingly. The predeterminable position before the pressure beam hits the workpiece is conveniently located 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 preferably takes place with the lowest possible force impulse or the lowest possible force applied to the workpiece. The size of the force impulse or force effect can, in preferred variants, depend on parameters of the workpiece such as its material and/or size and/or from operating states and/or parameters of the workpiece Panel dividing system, such as the required cutting quality, the cutting sequence, etc. can be controlled.

Other features and details preferred

• 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.

Embodiments of the invention are explained by way of example in the following description of the figures using 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 always have to occur in this combination when implementing the invention. All preferred features or variants described below can therefore also be seen on their own and can also be implemented in exemplary embodiments of the invention other than those shown in combination with other preferred features of the invention. Show it:

• Fig. 1 a first exemplary embodiment of a panel dividing system according to the invention in a frontal view of the pressure beam from the direction of the area in which the feed device can be located;
• Fig. 2 a section orthogonal to this along the section line AA Fig. 1 ;
• Fig. 3 to 5 different views of area B Fig. 1 omitting the workpiece;
• Fig. 6 to 9 alternative embodiments of area B according to the invention;
• 10 and 11 Representations of pressing the workpiece onto the workpiece support table using the pressure beam of the first exemplary embodiment;
• Fig. 12 to 17 Representations of a further embodiment variant of the invention, in which two pressure beams 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 exemplary embodiment according to the invention, which has pressure bars arranged one behind the other along the cutting line 2;
• Fig. 21 an example of the effective torque curve of the electric motor and
• Fig. 22 a sectional view to explain various options for designing intervention monitoring devices to detect manual intervention by operating personnel in the area between the pressure beam and the workpiece support table.

This in Fig. 1 The first exemplary embodiment of a panel dividing system 1 according to the invention shown shows a workpiece support table 3 with a workpiece 2 arranged on it as an example Fig. 1 Workpiece 2 shown as an example is a plurality of adjacent stacks of plate strips. Of course, it can also be stacks of plates, individual plates, etc. For sawing, the respective workpiece 2 is positioned in the area of the sawing line 9 on the support level 25 of the workpiece support table 3 in such a way that the workpiece 2 can be seen in one sawing process by means of the saw 4, which can be moved along the sawing line 9 with the saw carriage 33 and is designed here as a circular saw blade can be sawn in the desired manner. Even if the support level 25 is not explicitly mentioned elsewhere, resting the workpiece 2 on the workpiece support table 3 means that the workpiece is resting 2 on the support level 25 of the workpiece support table 3. In the exemplary embodiment shown, an additional scoring saw 34, here also designed as a circular saw blade, is provided in the saw carriage 33. This is known per se, but does not necessarily have to be implemented this way. Conveniently, the saw 4, as well as the scoring saw 34, can be lowered into the saw carriage 33 to below the support level 25 in a manner known per se. In this position, the saw 4 and the scoring saw 34 are lowered so far that they do not protrude beyond the workpiece support table 3 or its support level 25. This can also be provided in the method already mentioned at the beginning as a securing position for the saw 4 and, if necessary, the scorer saw 34 that is also present. Another securing position would consist in moving the saw carriage 33 with the saw 4 and the scorer saw 34, if present, so far along the saw line 9 that it comes outside the area between the pressure beam posts 6 and 7.

The positioning of the respective workpiece 2, which is a stack of plates in the example shown, can be done mechanically, for example with the in Fig. 2 indicated feed device 35, which is known per se. The feed device 35 grips the workpiece 2 to be sawn with its clamps 36 in a manner known per se and transports and positions the workpiece 2 on the workpiece support table 3 relative to the sawing line 9 in the desired manner, so that the cut can be made using the saw 4 the desired position can be done through the workpiece 2. In addition to the feed device 35 shown here as an example, further transport and rotation devices known per se can be provided in order to move the workpiece 2 to the sawing line 9 and from it in a manner known per se this way to transport and position. This can be carried out in numerous different variants as in the prior art and does not need to be explained further. In any case, the main transport direction 64 is generally the feed direction 37 with which the workpiece 2 to be sawn is transported from the feed device 35 towards the sawing line 9, in particular before the first sawing process is carried out. Seen in the main transport direction 64, operating personnel 61 are usually on the side behind the saw line 9, i.e. in Fig. 2 on the side of the saw line 9 opposite the feed device 35. From there, the operating personnel 61 can rotate, align workpieces 2 in a manner known per se, feed them back to the saw line 9 or manually manipulate them in another way. In principle, as already explained at the beginning, panel 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 to manually manipulate the workpieces 2 and generally no longer have access to the sawing line 9 for safety reasons.

The angle stop 22, which is known per se, is located on one of the pressure beam supports, here on the pressure beam support 6. The workpiece 2 to be sawn can be placed on this and thus aligned.

In the exemplary embodiment shown according to Fig. 1 the two pressure beam supports 6 and 7 are connected to one another by means of a guide carrier 28. In this exemplary embodiment, an alignment carriage 29 is arranged on this so that it can move along the pressure beam 5. Such alignment carriages 29 and their drives are known per se. You can come with Use their aligning cams 30 to move the workpiece 2 to be sawn in a direction parallel to the saw line 9 and in particular towards the angle stop 22 and align it with this.

The pressure beam 5 is mounted in a known manner on the pressure beam supports 6 and 7 in the direction 10 towards the workpiece support table 3 and thus towards the workpiece 2 and in the direction 11 away from the workpiece support table 3 and can thus hold the workpiece 2 in the appropriately lowered state Press onto or against 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 well as in the other exemplary embodiments, there is a suction channel 38 in the pressure bar 5 for suctioning off chips and dust generated during the sawing process. A corresponding suction system, not shown here, can be connected to the suction connection piece 32 in order to suck out the dust and chips generated during the sawing process through the suction channel 38 and the suction connection piece 32 in a manner known per se. This can be carried out as is known in the prior art.

In this exemplary embodiment, the pressure beam 5 is guided on the pressure beam supports 6 and 7 by means of a guide 20 in order to be able to carry out the movement in directions 10 and 11. The electric motor 8 is provided as a motor drive for carrying out the movement of the pressure beam 5 along the pressure beam supports 6 and 7 and for pressing the workpiece 2 in the area of the saw line 9 onto the workpiece support table 3 by means of the pressure beam 5. In the exemplary embodiment shown according to Fig. 1 is this the one only motor drive with which the pressure beam 5 is moved accordingly in the directions 10 and 11 and pressed against the workpiece 2 or the workpiece support table 3. They are in the exemplary embodiment according to Fig. 1 So no other motor drives are provided to move or press the pressure bar 5. The reference number 31 denotes the known motor controller, which regulates or controls the electric motor 8.

The area B Fig. 1 will now be based on the following Fig. 3 to 5 explained in more detail, whereby in the Fig. 3 to 5 the workpiece 2 is not shown. In the perspective view according to 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 stay 6, here even in the pressure beam stay 6 or in a cavity of the pressure beam stay 6. He can do it, like in the Fig. 3 to 5 can be seen, especially in the further raised position of the pressure beam 5, protruding a little way up from the pressure beam stand 6. In the exemplary embodiment shown, the motor housing 23 of the electric motor 8 is fixed to the pressure beam 5 in such a way that the electric motor 8 is moved along with the pressure beam 5 when the pressure beam 5 is moved along the pressure beam supports 6 and 7, i.e. in the directions 10 and 11. In the exemplary embodiment shown, the motor housing 23 is fixedly connected to the pressure beam 5 by means of the attachment housing 43. The attachment housing 43 is passed through an opening 50 of the pressure beam stand 6 in order to be able to connect the pressure beam 5 arranged outside the pressure beam stand 6 with the electric motor 8 arranged inside the pressure beam stand 6.

In the oblique view according to Fig. 4 the lead is 20 good see with which the pressure beam 5 is mounted on the pressure beam stand 6 so that it can move 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 stay 6. The guide carriages 39 are slidably guided on the guide rail 40, so that the pressure beam 5 can be guided relative to the pressure beam stay 6 in the directions 10 and 11. Of course, corresponding guides 20 could also be designed differently than shown here. There are numerous possibilities for this in the prior art. In any case, the guide 20, as shown here, is advantageously a linear guide. On the pressure beam post 6 there is, as in the 3 and 4 Also clearly visible is the angle stop 22. In other words, in this exemplary embodiment, the angle stop 22 is arranged on the pressure beam stand 6, in which the electric motor 8 is also located.

The following descriptions essentially focus on: Fig. 5 Referenced. All components of the transmission mechanism of the plate dividing system 1 arranged and acting between the pressure beam 5 and the electric motor 8 are located there on this pressure beam stand 6 for moving and guiding the pressure beam 5 along the pressure beam stands 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 can be clearly seen. In this exemplary embodiment, it is an electric motor 8, which generates rotational movements of its output shaft 13, shown schematically here. In this embodiment, as in Fig. 5 shown at least schematically, a step-up and / or reduction gear 21 designed in the form of a bevel gear is provided, which is in the mounting housing 43 is arranged and, in addition to the angular translation of the rotational movement of the output shaft 13, the rotational speed of the output shaft 13, which is optimal for the electric motor 8, is converted into the speed required for the movement and the pressing process by means of the pressure bar 5. The drive gear, which is designed here as a rack and pinion gear 18, follows on the output side of the transmission and/or reduction gear 21. This rack 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 gear 18 in the exemplary embodiment shown has the gear 42 driven by the electric motor 8 via the step-up and/or reduction gear 21, which engages in the rack 41 of the rack gear 18. In this exemplary embodiment, the rack 41 is fixed or stationary on the pressure beam stand 6, so that when the gear 42 is rotated accordingly, the pressure beam 5 together with the mounting housing and electric motor 8 can be moved in the directions 10 and 11. In this way, a corresponding pressing of the workpiece 2 onto the workpiece support table 3 can be achieved by means of the pressure bar 5.

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 is illustrated that with correspondingly long transmission shafts 24, a storage of the transmission shaft 24 can be provided by means of a storage 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 stand 7 and also a drive gear in the form of a rack and pinion gear 18 are also provided on the pressure beam stand 7. The rack gear 18 and the guide 20 on the pressure beam stand 7 are designed in this exemplary embodiment as in other preferred embodiments such as the rack gear 18 and the guide 20 on the pressure beam stand 6. The gear 42 of the rack gear 18 on the pressure beam stay 7 is rotated by means of the transmission shaft 24 in the same way as the gear 42 of the rack gear 18 on the pressure beam stay 6. As a result, the movement generated by the electric motor 8 is transmitted to both pressure beam stays 6 and 7. As a result, the pressure beam 5 can be both guided and driven particularly well on both pressure beam supports 6 and 7 by means of a single electric motor 8. The transmission mechanism arranged and acting between the pressure beam 5 and the electric motor 8, here in particular between the pressure beam 5 and the output shaft 13 of the electric motor 8, includes in this exemplary embodiment, as particularly well in the Fig. 1 and 5 can be seen, i.e. the transmission and/or reduction gear 21, the rack gears 18 and guides 20 arranged on the respective pressure beam supports 6 and 7 and the transmission shaft 24. As already explained at the beginning, this transmission mechanism is not designed to be self-locking in preferred embodiments of the invention , so that the pressure beam 5, following gravity, lowers 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 explained below is in the release state located. The overall efficiency of the transmission mechanism explained at the beginning, 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. 1 and 5 thus from the product of the partial efficiencies of the components of the transmission mechanism, here the transmission and/or reduction gear 21, the two rack gears 18, the two guides 20 and the transmission shaft 24, in particular also their storage in the bearing 27. In order to also check the pressure beam 5 and in particular to be able to lock it in its current position relative to the workpiece support table 3 when the electric motor 8 is in the inactive state, is the case with the panel dividing system 1 of this first exemplary embodiment, as in particular in 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 current position relative to the workpiece support table 3. This parking brake 12 is at least between a locking state, in which the pressure bar 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 bar 5 is relative to the parking brake 12 for movement along the pressure bar stays 6 and 7 to the workpiece support table 3 and for pressing the workpiece 2 in the area of the saw line 9 to the workpiece support table, is released, switchable. In preferred embodiments, as already explained at the beginning, this involves an automatically closing parking brake 12, in which it is provided that it forcibly assumes the locking state when the electric motor 8 is not active. In this first exemplary embodiment, as in Fig. 1 and 5 see this parking brake 12 in the electric motor 8 is integrated. In particular, in this exemplary embodiment it is also realized that the parking brake 12, at least in the locked state, acts on the drive shaft 13 of the electric motor 8 with brake shoes or the like that are known per se but are not shown in detail here. In addition, in this exemplary embodiment, the position determining device 14 is also integrated into the electric motor 8. In the variant shown here, this determines the instantaneous 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 instantaneous 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 can be purchased commercially and are therefore, viewed in themselves, state of the art.

In order to avoid damage to the workpiece, an elastic support 26 is conveniently arranged on the pressure beam 5 on the side of the pressure beam 5 facing the workpiece support table 3, as is also realized here. This can be designed as a pressure sensor strip 17 in a manner known per se. It can serve as an intervention monitoring device 16 to detect whether operating personnel 61 accidentally still 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 which it is detected that the pressure bar 5 has struck the workpiece 2 when it is lowered.

The only one-sided provision of the single electric motor 8 in the area of only one of the pressure beam stays 6 and in particular in or in the area of the pressure beam stay 6 with the angle stop 22 may initially appear to the person skilled in the art to be statically unfavorable. But it has, especially 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 rests against the angle stop 22, can be optimally clamped. In the case of wider workpieces 2 that extend over the entire or a large part of the sawing line 9, the one-sided arrangement of the motor 8 does not result in any major disadvantages, since the pressure beam 5 and the corresponding parts of the transmission mechanism can be made correspondingly rigid.

Based on Fig. 6 to 9 Alternative embodiments will now be shown and explained below, which are in area B of the first exemplary embodiment Fig. 1 can also be used. Here, only the differences from the first exemplary embodiment described so far will be discussed and otherwise reference will be made to the descriptions above. 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, a step-up 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, is directly connected to the drive gear, here in the form of a rack gear 18 on the pressure beam stand 6 and can act via the transmission shaft 24 on the rack gear 18 arranged opposite on the pressure beam stand 7. This also applies to these torque motors Fig. 6 can use the parking brake 12 and/or the position determination device 14 can be integrated into the electric motor 8.

In Fig. 7 An embodiment variant is shown in which the electric motor 8 is designed in the form of an electric linear motor with a primary part 44 and a secondary part 45. The secondary part 45 is in Fig. 7 Example shown is firmly attached to the pressure beam stand 6. The relatively movable primary part 44 of the electric motor 8, designed as a linear motor, is in this example fixed to the pressure beam 5 via the attachment housing 43, so that moving the primary part 44 along the secondary part 45 forces the gear 42 to roll in the attachment housing 43 along the rack 41 of the latter Rack gear 18 causes this rotational movement via the transmission shaft 24 to a corresponding one, as in Fig. 1 shown, trained rack gear 18 is transmitted to the other pressure beam stand 7.

In this embodiment according to 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. In this exemplary embodiment, it is rather a variant of a parking brake 12 that is attached to the outside of the electric motor 8 and can be moved along a brake rail 46 in the released state. This brake rail 46 is fixed here on the pressure beam stand 6. In the locking state, the parking brake 12 engages the brake rail 46 in such a way that the pressure bar 5 is locked in its respective instantaneous position relative to the workpiece support table 3. For the sake of completeness, it should be noted that corresponding parking brakes 12 do not necessarily have to be connected directly to the electric motor 8. It could also, for example be provided to integrate corresponding parking brakes 12 into 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 determining device 14 is integrated into the electric motor 8 as a linear measuring device. It is clear that even without integration into the electric motor 8, numerous possibilities are known in the prior art as to how corresponding position determining 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, however, the transmission mechanism provides a spindle gear 19 in addition to the rack gears 18, which in this exemplary embodiment according to Fig. 8 is formed from a fixed, i.e. non-rotating spindle 48 and a spindle nut 47 rotatably mounted thereon. The spindle 48 is non-rotatable and fixed in its position on the pressure beam stand 6 by means of the spindle bearings 49. The spindle nut 47 is connected in a rotationally fixed manner to a corresponding output shaft 13 of the electric motor 8, which is not explicitly shown here. The spindle 48 is according to 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 via an add-on housing 43 fixed to the pressure beam 5. By turning the spindle nut 47 using the electric motor 8, the traversing movements in the directions 10 and 11 of the pressure beam 5 are generated. In this exemplary embodiment, the rack gears 18 arranged on both pressure beam supports 6 and 7 and the transmission shaft 24 arranged between them serve exclusively to transmit these movements in directions 10 and 11 via the spindle gear 19 or to press the pressure beam 5 onto a corresponding workpiece 2 on the 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, which is fixed in the attachment housing 43 in this variant. In this variant, the rotary movement of the electric motor 8 leads to the fact that the spindle nut 47 and the mounting housing 43 fixed to the pressure beam 5 and thus the pressure beam 5 can be moved in the directions 10 and 11, or the workpiece 2 can be moved onto the by means of the pressure beam 5 Workpiece support table 3 can be pressed.

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

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

In Fig. 12 an exemplary embodiment is shown in a section orthogonal to the saw line 9, in which, viewed in the main transport direction 64, two individual pressure bars 5 arranged one behind the other are provided. These together delimit a suction channel 38, which as in Fig. 1 can be extracted via the suction connection piece 32. There is therefore a pressure bar 5 in front of 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, i.e. the drive gears, such as the rack gears 19 shown here, and the guides 20 can otherwise be designed in a manner analogous to the exemplary embodiments shown so far. This also applies to the transmission of the rotary movement by means of the transmission shafts 24 to the other pressure beam stand 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 various tasks and configurations. For the functionality 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 are also divided Pressure bar 5 could be called, can be used flexibly for carrying out various cuts and in particular for so-called dust cuts. Fig. 13 shows a so-called dust cut, in which only a very small amount of 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 beams 5 in which the dust cut is carried out in such a way that no dust or chips are released to the outside. For this purpose, the second pressure beam 5, which is not resting on the workpiece 2, is moved all the way down to the workpiece support table 3, so that all the dust and all the chips go into the suction channel 38 arranged between the two pressure beams 5 and not to the outside. Fig. 15 shows the situation in which both pressure beams 5 rest completely on the workpiece 2. Fig. 16 and 17 show the situations during a dust cut on the other side of the workpiece 2.

In Fig. 18 is a modification 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 driven here 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 attachment housing 43, so that they move with the pressure beam 5 in the directions 10 and 11 when it moves. The attachment and the transmission mechanisms of the respective electric motors 8 can each, as shown in Fig. 1 to 9 explained, be designed in different design variants. Reference can therefore be made to the above statements in this regard. The two electric motors 8 and their transmission mechanisms are via the transmission shaft 24 mechanically positively coupled, which leads to a mechanical standardization of the movements of the pressure beam 5 relative to the two pressure beam stays 6 and 7. Otherwise, reference can be made to the description of the embodiment 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 achieved here via appropriate regulation or control of both electric motors 8 via a single motor controller 31. Otherwise, you can return to the example using the Fig. 1 to 9 explained variants are referred to, which in Fig. 19 can also be applied accordingly. For an extended variant not shown Fig. 19 A motor controller 31 is provided for each electric motor 8, these motor controllers 31 being coupled to one another in terms of signals.

In Fig. 20 a variant of a panel dividing system 1 according to the invention is shown, in which two pressure beams 5 arranged one behind the other in the longitudinal direction of the sawing line 9 are realized over a single sawing line 9. In order to achieve this, in this variant an additional pressure beam stand 51 is attached or suspended from the guide carrier 28. In addition, in this exemplary embodiment, in contrast to the exemplary embodiments described so far, there is also an angle stop 22 on the pressure beam stand 7. In this variant according to Fig. 20 It is provided that one of the two pressure beams 5 is guided via corresponding guides 20 on the one hand on the pressure beam stand 6 and on the other hand on the pressure beam stand 51. The other of the pressure beams 5 has corresponding guides 20 on the pressure beam stand 7 and on the pressure beam stand 51. Each of the two pressure beams 5 is driven in the directions 10 and 11 and for pressing the workpiece 2 onto the workpiece support table 3 by its own and a single electric motor 8. The components of the transmission mechanisms arranged on the one hand on the pressure beam post 6 and on the pressure beam post 51 and on the other hand on the pressure beam post 7 and on the pressure beam post 51 as well as the respective transmission shafts 24 can, viewed individually, again as based on Fig. 1 to 9 explained in different variants, so that this does not have to be explained again.

The methods explained at the beginning can, in particular taking into account the in Fig. 22 Details shown and explained further below can be implemented on all variants of panel dividing systems 1 shown here. Fig. 21 shows an example of 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 then pressed against the workpiece support table 3. In phase 1 marked with the reference number 52 the pressure beam 5 is raised at a distance above the workpiece support table 3 by means of the electric motor 8. The electric motor 8 must hold the dead weight of the pressure beam 5 with its effective torque in this phase. In phase 2, marked with reference number 53, the lowering process begins, in which the pressure beam 5 is lowered in direction 10 towards the workpiece support table 3 or towards the workpiece 2 resting 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 bar 5 is lowered at a constant rate Speed in direction 10 towards the workpiece 2. In phase 5, marked 56, the pressure bar 5 hits the workpiece 2, which can be clearly seen in the effective torque curve of the electric motor 8. In phase 6, marked 57, the pressure builds up on the workpiece 2 up to the dead weight of the pressure beam 5. In phase 7, marked 58, the load is reversed by eliminating the mechanical play in the transmission mechanism. In phase 8, marked 59, a further pressure build-up takes place on the workpiece 2 by means of the pressure beam 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 beam 5. In phase 9, marked with reference number 60, in this exemplary embodiment the workpiece 2 is then pressed against 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, using the invention, movements and the pressing of the pressure bar 5 can be specifically controlled and regulated by means of the electric motor 8 and the transmission mechanism equipped with a correspondingly high level of efficiency. Almost any contact pressure curve can be implemented. Instead of the effective torque, for example, the current consumption of the electric motor 8 could also be used, which would result in a corresponding curve.

In Fig. 22 For example, the operating personnel 61 positioned behind the sawing line 9, viewed in the main transport direction 64, are shown. Further 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 the basis of which is to be able to carry out the procedures 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 panel 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 that faces the operating personnel 61. These intervention monitoring devices 16 are always relevant when it is a panel dividing system 1 in which the workpieces in the area of the saw line 9 or the pressure beam 5 are manipulated exclusively or at least also manually by the operating personnel 61. In fully automatic panel dividing systems 1, these safety devices can also be omitted.

The first intervention monitoring device 16 is in Fig. 22 a known slat curtain 62 is shown, the slats of which preferably open automatically, as is known per se, when the saw 4 and the scoring saw 34, if present, have reached their securing position before the operating personnel 61 move their hand or their entire arm into the area of the pressure bar 5 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 pivoted upwards when a hand or an arm or another object is in the area is located directly in front of the pressure bar 5. Conveniently, this safety bar 63 is arranged behind the sawing line 9, viewed in the main transport direction 64, and thus behind the pressure bar 5 and thus on the side on which the operating personnel 61 is located. Preferred embodiment variants of the safety strip 63 can in particular recognize the essentially wedge-shaped shape of the hand and arm of the operating personnel. This is known per se. As a third variant of the intervention monitoring device 16 is in Fig. 22 The design of the elastic support 26 as a pressure sensor strip 17 is also shown. This can also be used to detect if 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, other intervention monitoring devices 16 known per se in the prior art can of course also be used in the panel dividing systems 1 explained at the beginning and the methods for their operation in order to detect 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 they are in Fig. 22 are only shown schematically.

Legend for the reference numbers:

1 Panel dividing system 26 elastic pad 2 workpiece 27 storage 3 Workpiece support table 28 Leadership carrier 4 saw 29 Host car 5 Pressure bar 30 Aligner cam 6 Pressure beam stayer 31 Engine controller 7 Pressure beam stayer 32 Suction connection piece 8th Electric motor 33 saw wagon 9 saw line 34 scoring saw 10 Direction 35 feed device 11 Direction 36 Klemmer 12 Parking brake 37 feed device 13 output shaft 38 Suction channel 14 Positioning device 39 Guide carriage 40 Guide rail 15 Safety position sensor sor 41 Rack 42 gear 43 Add-on housing 16 Intrusion monitoring device 44 Primary part 45 secondary part 17 Pressure sensor bar 46 Brake rail 18 Rack and pinion gear 47 spindle nut 19 Spindle gear 48 spindle 20 guide 49 Spindle bearing 21 Transmission and reduction gears 50 opening 51 Pressure beam stayer 22 Angle stop 52 Phase 1 23 Motor housing 53 Phase 2 24 transmission wave 54 Phase 3 25 support level 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 transport direction 65 cover

Claims (23)

Panel dividing system (1) for sawing at least one workpiece (2) consisting of at least one individual panel or at least one stack of panels, the panel 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 has at least two pressure beam supports (6, 7) and at least one electric motor (8), the saw (4) being movable along a sawing line (9) of the workpiece support table (3) for sawing the workpiece (2) lying on the workpiece support table (3). and the pressure beam (5) is mounted on the pressure beam supports (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 is moved along by the electric motor (8) to carry out the traversing movements the pressure beam stand (6, 7) and is driven to press the workpiece (2) in the area of the sawing line (9) onto the workpiece support table (3), characterized in that the panel 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) being locked at least between a locking state in which the pressure bar (5) is locked by the parking brake (12) in its respective instantaneous position relative to the workpiece support table (3). , and a release state in which the pressure bar (5) is moved by the parking brake (12) along the Pressure beam stand (6, 7) is released relative to the workpiece support table (3) and for pressing the workpiece (2) in the area of the saw line (9) onto the workpiece support table (3), preferably completely, can be switched. Panel 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 it forcibly assumes the locking state when the electric motor (8) is not active. Panel dividing system (1) according to claim 1 or 2, characterized in that the parking brake (12) is integrated into the electric motor (8) and/or that the parking brake (12) is applied, at least in the locking state, to an output shaft (13) of the electric motor (8). affects. Panel dividing system (1) according to one of claims 1 to 3, characterized in that the panel 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). Panel dividing system (1) according to claim 4, characterized in that the position determining device (14) is integrated into the electric motor (8), preferably measuring the movement of one or the output shaft (13) of the electric motor (8). Panel dividing system (1) according to one of claims 1 to 5, characterized in that the pressure beam (5) is in one The safety position provided for the manipulation of the workpiece (2) by operating personnel (61) and distanced from the workpiece support table (3) can be moved and the panel dividing system (1) has a safety position sensor (15) to determine whether the pressure bar (5) is in the safety position, having. Panel dividing system (1) according to one of claims 1 to 6, characterized in that the panel dividing system (1) has at least one intervention monitoring device (16) for detecting manual intervention by operating personnel (61) in an area between the pressure beam (5) and the workpiece support table ( 3), wherein it is preferably provided that the engagement monitoring device (16) is a pressure sensor strip (17) arranged on the pressure beam (5) on a side of the pressure beam (5) facing the workpiece support table (3). Panel dividing system (1) according to one of claims 1 to 7, characterized in that the pressure beam (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 released state. Panel dividing system (1) according to one of claims 1 to 8, characterized in that between the pressure beam (5) and the electric motor (8), preferably between the pressure beam (5) and one or the output shaft (13) of the electric motor (8) , a transmission mechanism of Panel dividing system (1) for moving and guiding the pressure beam (5) along the pressure beam supports (6, 7) and for pressing the workpiece (2) in the area of the sawing line (9) to the workpiece support table (3) is arranged and / or acts and the Transmission mechanism has an overall efficiency of at least 80%, preferably 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 has at least one drive gear, preferably a rack 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 supports (6, 7) and/or in pressing the workpiece (2) in the area of the sawing line (9) against the workpiece support table (3) and at least one guide (20) for guiding the pressure beam (5) along the pressure beam supports (6, 7 ). Panel dividing system (1) according to claim 10, characterized in that the transmission mechanism additionally has a step-up and/or reduction gear (21) for step-up and/or step-down the movement generated by the electric motor (8). Panel dividing system (1) according to one of claims 1 to 11, characterized in that the pressure beam (5) of the panel dividing system (1) or each pressure beam (5) of the panel dividing system (1) is used to carry out the traversing movements of the pressure beam (5) along the pressure beam supports ( 6, 7) and to press the workpiece (2) in the area of the saw line (9) onto the Workpiece support table (3) is driven by exactly one electric motor (8) as the only motor drive unit by means of the pressure beam (5). Panel dividing system (1) for sawing at least one workpiece (2) consisting of at least one individual panel or at least one stack of panels, the panel 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 has at least two pressure beam supports (6, 7) and at least one electric motor (8), the saw (4) being movable along a sawing line (9) of the workpiece support table (3) for sawing the workpiece (2) lying on the workpiece support table (3). and the pressure beam (5) is mounted on the pressure beam supports (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 is moved along by the electric motor (8) to carry out the traversing movements the pressure beam stand (6, 7) and is driven to press the workpiece (2) in the area of the sawing line (9) onto the workpiece support table (3), in particular according to one of claims 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 supports (6, 7), preferably in one of the pressure beam supports (6, 7). Panel dividing system (1) according to claim 13, characterized in that on this pressure beam post (6, 7) or at least between this pressure bar post (6, 7) and the saw line (9) there is an angle stop (22) of the panel dividing system (1) for aligning the workpiece (2) is arranged on the workpiece support table (3). Panel 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) in such a way that the electric motor (8) during the process of the pressure beam (5) is moved along the pressure beam supports (6, 7) with the pressure beam (5). Panel 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 panel dividing system (1). Method for operating a panel dividing system (1) according to one of claims 1 to 16, characterized in that in the inactive state of the electric motor (8), the parking brake (12) is forcibly brought into the locking state. Method for operating a panel dividing system (1) according to one of claims 1 to 16, characterized in that the pressure beam (5) is moved into a safety position intended 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 a manual intervention by the operating personnel (61) in the area between the pressure beam (5) and the workpiece support table (3) is detected by at least one or the intervention monitoring device (16). . Method for operating a panel dividing system (1) according to one of claims 1 to 16, characterized in that when a sawing process is aborted, the saw (4) is brought into a safety position and then the pressure beam (5) is moved into a position for manipulating the workpiece (2). moved to a safety position provided by operating personnel (61) and distanced from the workpiece support table (3) and held there by means of the electric motor (8) or the parking brake (12). Method for operating a panel dividing system (1) for sawing at least one workpiece (2) consisting of at least one individual panel or at least one stack of panels, the panel 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 supports (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 sawing line (9) of the workpiece support table ( 3) is moved and the pressure beam (5) is moved on the pressure beam supports (6, 7) in the direction towards the workpiece support table (3) and in direction (10) away from the workpiece support table (3) and by the electric motor (8) to carry out the Movement movements are driven along the pressure beam supports (6, 7) and for pressing the workpiece (2) in the area of the sawing line (9) onto the workpiece support table (3), in particular a method for operating a panel dividing system (1) according to one of claims 1 to 16, characterized in that the following sequence of Procedural steps are carried out: a) positioning the workpiece (2) on the workpiece support table (3) and the saw line (9), the pressure beam (5) being arranged at a distance from the workpiece support table (3) during this positioning; b) lowering the pressure beam (5) in direction (10) towards the workpiece (2); c) stopping the pressure beam (5) when it hits the workpiece (2) or in a predeterminable position before the pressure beam (5) hits the workpiece (2); d) applying a predeterminable target pressure or target pressure curve to the workpiece (2) using the pressure bar (5) and sawing the workpiece (2) using the saw (4) along the sawing 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 at which the pressure bar (5) is lowered in the direction (10) towards the workpiece (2) depends on the workpiece (2) and / or an operating state or at least one parameter of the panel 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 bar (5), which is used as the predeterminable position before the pressure bar (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 specified depending on the workpiece (2) and/or on a position of the saw (4) along the sawing line (9).

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