EP3668672A1 - Schere zur metallbearbeitung mit elektrischem direktantrieb - Google Patents
Schere zur metallbearbeitung mit elektrischem direktantriebInfo
- Publication number
- EP3668672A1 EP3668672A1 EP18755800.2A EP18755800A EP3668672A1 EP 3668672 A1 EP3668672 A1 EP 3668672A1 EP 18755800 A EP18755800 A EP 18755800A EP 3668672 A1 EP3668672 A1 EP 3668672A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- drive
- scissors
- rotor
- electric motor
- shaft
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
- B23D15/00—Shearing machines or shearing devices cutting by blades which move parallel to themselves
- B23D15/12—Shearing machines or shearing devices cutting by blades which move parallel to themselves characterised by drives or gearings therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
- B23D25/00—Machines or arrangements for shearing stock while the latter is travelling otherwise than in the direction of the cut
- B23D25/02—Flying shearing machines
- B23D25/04—Flying shearing machines in which a cutting unit moves bodily with the work while cutting
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
- B26D1/00—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor
- B26D1/01—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work
- B26D1/04—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a linearly-movable cutting member
- B26D1/06—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a linearly-movable cutting member wherein the cutting member reciprocates
- B26D1/08—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a linearly-movable cutting member wherein the cutting member reciprocates of the guillotine type
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
- B26D5/00—Arrangements for operating and controlling machines or devices for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
- B26D5/08—Means for actuating the cutting member to effect the cut
- B26D5/086—Electric, magnetic, piezoelectric, electro-magnetic means
Definitions
- the invention relates to a pair of scissors, preferably cross-cut scissors or flying scissors, for cutting a strip-shaped metal material in metalworking, the scissors having a drive and a movable blade carrier.
- split shears and flying shears are used in various designs to cut strip-shaped metal materials made of steel or non-ferrous metals, the non-ferrous metals.
- So-called start / stop shears are predominantly hydraulically and / or pneumatically driven, but further embodiments are known in which the drive is realized by an electric crank mechanism.
- the movable blade carrier is actuated via a crankshaft.
- a permanently driven via a three-phase motor flywheel supplies the drive energy.
- the flywheel With the help of a clutch / brake combination, the flywheel is briefly connected to the crankshaft and thus executed the cut. The system then brakes the crankshaft again and positions it in the starting position.
- a cross-cut scissors in which both a vertical cutting movement and a horizontal forward movement is realized by a suitable mechanical crank mechanism during the cut, referred to as flying shears.
- the drive components include a reduction gear, a synchronous shaft, a clutch with brake, a base frame and Covers. This can be on the continuously running band parts of the tape, for example, to be scrapped.
- a flying scissors with a knife carrier, which is moved in the cutting direction of an electrically operated crankshaft, is described in DE 26 1 1 988 A1.
- Motor scissors of the type described above usually allow a high cutting rate, compared to a hydraulically driven scissors.
- the operation of the scissors is via a drive train, which, as mentioned above, in addition to a three-phase motor for generating the torque further mechanical components for transmitting and changing the torque, such as clutches, a drive spindle, which may be designed as a propeller shaft, a Gear reducers with gears, bearings, braking means and other moving mechanical parts.
- This technological separation means that the interface between the machine part to be driven and the drive is not optimal.
- the components of the drive train, in particular the clutch / brake combination are prone to failure and maintenance-intensive.
- the problem may arise that both the clutch and the transition from the transmission to the clutch and from the clutch to the rotor of the drive against torsional loads are not torsionally stiff to the desired extent. Due to the torsional compliance, the speed and the angle of rotation of the crankshaft of the work machine can oscillate against the drive, which can lead to problems in the control accuracy.
- the drive construction also takes up a lot of space. This leads to high costs and power losses in the drive train. For the reasons mentioned above, motor scissors have in practice been displaced by hydraulic solutions.
- the scissors should have a high reliability and control accuracy in a compact design and low cost.
- the scissors according to the invention which is preferably designed as a cross-cut scissors or flying scissors, is used for cutting a band-shaped metal material, preferably made of steel or non-ferrous metals, the so-called non-ferrous metals.
- the scissors has a frame and a knife carrier.
- the knife carrier is movable along a cutting trajectory and has a knife which comes into contact with and cuts through the cutting material during a movement of the knife carrier along the cutting trajectory for cutting the metal material.
- the frame preferably has guide means which cooperate with the knife carrier so that it is reliably movable along the cutting trajectory.
- the scissors on a drive which has an electric motor with a stator and a relative to the stator movable rotor, wherein the rotor is connected to the blade carrier or connectable, that the blade carrier for the cutting operation is driven by the rotor.
- the electric motor is either a linear motor or a rotary electric motor, wherein the rotor in the latter case is a rotor whose rotation on a shaft, preferably a crankshaft or eccentric shaft, the scissors is transferable, and the stator is mounted directly on the frame and / or the Rotor is directly connected to the shaft.
- the frame may be open or closed, in particular falling housing, base frame, machine frame and the like under the name "Frame".
- the frame in the case of a rotary electric motor, one or more bearings for rotatably supporting the shaft, which cooperates with the actuation of the blade carrier, on.
- the electric motor can be designed as an internal rotor or external rotor.
- the electric motor of the drive can be designed as a compact motor with its own bearings or bearings.
- the electric motor may be a permanent magnet three-phase motor, it preferably has a motor housing or motor frame, in which the rotor is mounted, which is for example in the conventional manner by the force exerted by a magnetic field on current-carrying conductor of a coil in motion.
- the frame of the scissors or a part thereof can be shared as a motor housing.
- the electric motor is a torque motor or synchronous motor.
- Such motors can produce very high torques at relatively low speeds, making them particularly suitable as motors for direct drives.
- a reduction gear can be dispensed with in many cases.
- the rotor is connected to the shaft, whereby the rotation of the rotor is transmitted to the shaft.
- the stator is mounted directly on the frame of the scissors and / or the rotor is directly connected to the shaft. If the stator of the drive is directly connected to the frame, the frame of the scissors and the drive are "locked” together in this way. Any drive housing or motor housing, drive frame or motor frame is considered as part of the stator.
- the relevant mechanical components are in direct contact with each other, preferably in a rigid manner. This can be achieved for example by screwing, riveting or welding, but also a one-piece design is included.
- the drive functions as a direct drive for operating the blade carrier. Due to the special integration on the one hand a extremely high rigidity, in particular Drehsteif ig speed achieved in the case of the rotary electric motor, between the electric motor and the blade carrier or the shaft, on the other hand complex mechanical components, such as gearboxes, clutches, brakes, cardan shafts, etc.
- the illustrated drive system allows a simple increase in drive power, for example, in a conversion or modernization of the system, when about new materials to be processed without the existing drive must be replaced.
- the maintenance work on the shears is reduced, whereby the production time of the plant can be extended.
- this is accompanied by a reduction of safety-related expenses.
- the degrees of freedom of the machine are increased in terms of function and design.
- the frame can also be used as a heat sink or cooling surface of the electric motor. Any implementation for media, such as hydraulic oil and / or cooling water, is also possible from the drive side.
- the rotor and the shaft are preferably formed in one piece. As a result, the torsional stiffness between the drive and the shaft, thus the control accuracy can be further improved.
- the frame preferably supports the shaft only on one side, while the frame is not second Has storage for the shaft, but the shaft is mounted on the opposite side via a rotor bearing of the drive.
- the frame supports the shaft on two sides, wherein a storage of the rotor in the drive is eliminated. In this way, the shaft and the rotor can share a storage.
- two drives are provided on opposite sides of the frame for driving the knife carrier in order to even out the force and weight distribution and / or to increase the drive power while maintaining a compact installation space.
- the rotor of the drive is preferably connected to the shaft without the interposition of a torque transmission, in particular without the interposition of a reduction gear.
- a torque transmission By dispensing with a torque transmission, there is a direct and immediate torque transmission from the drive to the shaft.
- torque train includes all those types of transmissions that convert an input torque or an input speed into an output torque or an output speed of other magnitude, thus performing a torque conversion.
- the drive can be connected in certain embodiments via a spindle and / or a cardan shaft with the shaft. This is particularly suitable for drives with high performance or in adverse environmental conditions, such as in the hot rolling mill, into consideration.
- the frame is provided horizontally movable, for example, mounted on a horizontally movable carriage, and by means of a horizontal drive, which preferably has a linear electric motor, horizontally driven, ie horizontally movable.
- a robust flying cutting scissors can be produced, which is particularly good for Cutting thicker bands, such as hot strips, is suitable.
- the application of the linear motor as a drive device for horizontal displacement of the frame can be dispensed with a mechanically complex and maintenance-intensive crank mechanism, which must realize both a vertical cutting movement and a horizontal forward movement during the cut.
- the drive has at least one catching magnet, which may be arranged, for example, annularly around a rotor extension.
- the capture magnet is designed to capture magnetic particles and keep them away from the stator and rotor of the drive.
- magnetic particles can be prevented from getting into the electric motor, thereby improving the reliability of the drive.
- the drive set forth above can be constructed in a modular manner, wherein it has at least one base module with a stator and rotor. If necessary, the drive can be extended by further modules, which are preferably cylindrical or disc-shaped.
- Possible extension modules include, for example, a brake module, holding module, power increase module with drive means (such as rotor and stator) to increase the performance of the base module, a transmission module and / or a cooling module. So that the modules can be combined with each other, they have technically compatible components, in particular interconnectable or mutually flangeable housings or frames. Such a modular construction can increase the repetition frequency of identical parts (motor disks, stator disks, stator laminations, stator coils, brake disks, brake pads, etc.), thereby reducing the cost and increasing the reliability of the drive.
- drive means such as rotor and stator
- the drive preferably has a rotary encoder or speedometer for measuring the angle of rotation and / or the rotational speed.
- the Encoder can be provided as a separate module or as part of a module. Alternatively, a sensorless driving is possible.
- the drive may also be equipped with a cooling device.
- a cooling device This can be arranged for example as a separate module between the brake and the electric motor and / or as a cooling jacket in or on the motor housing of the drive.
- the cooling may be formed by means of a blower and / or as water or fluid cooling. Any passage for media, such as hydraulic oil and / or cooling water, is possible from the drive side, for example by the rotor of the rotary electric motor.
- the drive can have one or more integrated converters.
- the drive preferably comprises: an electric braking device configured to smoothly decelerate the rotor from a working condition to a holding condition in which the traveler is substantially stationary; a mechanical holding device, which is set up to mechanically lock the rotor when the mechanical holding device is operated in the holding state; and a controller configured to control the electric braking device and the mechanical holding device to convert substantially all of the kinetic energy from the electric brake device while the mechanical holding device is operated only in the holding state of the rotor.
- the braking takes place without friction in this preferred embodiment by means of an electric braking device.
- “frictionless” is meant the absence of mechanical friction, the braking takes place in this sense contactless. Material internal processes that may occur during electric braking, such as counter or eddy currents, are therefore not covered by the terms “friction”, “frictionless” and the like.
- the electric motor is decelerated at the regulated ramp of a powering inverter that powers the electric motor, such as by adjusting the frequency and voltage.
- the electric braking device which may be designed, for example, as a countercurrent brake or eddy current brake, operates smoothly and thus substantially free of wear.
- the runner After the runner has reached the holding state by braking by means of the electric brake device, the runner is mechanically locked in accordance with this preferred embodiment by actuating a mechanical holding device.
- the locking is preferably carried out in a non-positive or positive manner.
- the mechanical holding device can act, for example, holding jaws on a retaining disk, it can be provided on the shaft of the scissors or on the rotor of the electric motor or act on it.
- the electrical braking device and the mechanical holding device are controlled by the control device so that substantially all of the kinetic energy is reduced or converted by the electric brake device, while the mechanical holding device is actuated only in the holding state of the rotor.
- the mechanical holding device thus has the technical function to fix the rotor in the holding state, ie in the standstill position or to lock, without that it dissipates kinetic energy by friction.
- the mechanical holding device can therefore be made particularly compact, since it essentially does not have to convert kinetic energy. It has no wearing parts, at least there is only a small amount of wear. Furthermore, it is avoided that abrasion particles from the mechanical holding device can penetrate into the drive.
- the electric brake device reduces the total Movement energy is designed from the working state, while the mechanical holding device makes no contribution in this regard. Small energies from a creeping movement, for example, from vibrations and the like, on the other hand, can be absorbed and converted by the mechanical holding device.
- a feeding inverter which supplies the electric motor of the drive in the working state with power and having the above-mentioned function for braking the rotor in a normal operating state.
- the feeding converter for braking is preferably electrically isolated from the electric motor and the rotor is brought into the holding state by windings of the electric motor via a braking resistor and / or a resistor / capacitor circuit and / or directly short-circuited and / or an external DC voltage source is switched.
- the mechanical holding device must thus convert even in an extraordinary operating condition, such as a disturbance of the feeding inverter, no kinetic energy from the working state to the holding state.
- the entire kinetic energy of the machine is preferably in all operating conditions - for example, stop, quick stop, emergency stop, emergency stop - converted by the electric braking device.
- the mechanical holding device thus preferably takes over in any case - even in an emergency - only the technical function to fix the runner in the standstill position or to lock.
- the actuation of the mechanical holding device is carried out electrically, mechanically, hydraulically or pneumatically. Holding jaws, retaining washer, piston, hydraulic or pneumatic cylinders and lines, retaining clips, retaining pins - all such components that are suitable for the construction of the mechanical holding device can be designed for low forces and thus compact, easy and inexpensive to implement.
- the feeding converter may comprise further functions for motor control, preferably a speed measurement and / or a method for adjusting the rotating field as a function of the current state of the machine.
- the described with a preferred embodiment of the drive with electrical braking device and mechanical holding device is particularly well suited as a direct drive. Because in a direct drive for scissors, as stated above, sometimes very high torques can be held by a brake. While conventional brake calipers require a large installation space for this, the described combination of the electrical braking device and the mechanical holding device is optimally suitable for use with a direct drive.
- the disclosed direct drive is particularly well suited for scissors, in particular transverse dividing shears and flying shears, for cutting metal strips and sheets, in particular of steel and non-ferrous metals.
- the invention can also be implemented in related fields, for example in the paper, textile, rubber, plastics or basic industries. Further advantages and features of the present invention will be apparent from the following description of preferred embodiments.
- the features described therein may be implemented alone or in combination with one or more of the features set forth above insofar as the features do not conflict.
- the following description of preferred embodiments is made with reference to the accompanying drawings. Brief description of the figures
- FIG. 1 shows schematically the structure of a machine having a direct drive with an electric motor, driven by a direct drive machine and a holding device for braking the machine.
- FIG. 2 schematically shows a transverse dividing shear in which the upper knife carrier is driven by a linear motor.
- FIG. 3 schematically shows a flying shear, in which the upper knife carrier is driven by a rotary electric motor via a shaft.
- FIG. 4 schematically shows a rocker arm with double-sided drive.
- an exemplary drive is to be described, which is suitable as a direct drive, since it is equipped with a holding device, which is able by a combination of an electric braking device and mechanical holding device, high torques to brake reliably despite its compact design.
- 1 shows schematically the structure of a machine, which is a drive 10 with an electric motor to be driven by the drive 10 working machine 20, which is preferably a dividing shear or flying shears with a driven by the drive 10 blade carrier, and a holding device 30 for braking the machine having.
- the holding device 30 has an electrical braking device 40 and a mechanical holding device 50.
- the electric motor, preferably a synchronous motor or torque motor, of the drive 10 generally has a rotor 1 1, which is formed in the present example as a rotor, and a stator 12, which is preferably attached directly to a frame or housing of the working machine 20.
- the electric motor can be designed in a similar way as a linear motor.
- the rotor 1 1 is connected to a shaft of the working machine 20, whereby the rotation of the rotor 1 1 is transmitted to the shaft and thus to movable parts of the working machine 20.
- the relevant mechanical components are in direct contact with each other.
- the drive 10 may be designed as an internal rotor or external rotor.
- the integral concept also provides safety improvements as it eliminates the need for rotating external drive parts such as cardan shafts, clutches, brake discs, and so forth. It eliminates components such as bearings, shafts, couplings, engine bases, gear bases, etc.
- a reduction in the moving parts also has a higher control accuracy result, which in turn has a positive effect on the quality of the products to be produced.
- the holding device 30 has a control device 31, which controls the electrical braking device 40, the mechanical holding device 50 and optionally functions of the drive 10 and / or its feeding converter 13.
- control functions of the control device 31 for various operating states, in particular the normal operating state and an extraordinary operating state, are described:
- the holding device 30 For braking or stopping the work machine 20, the holding device 30 is provided, which has the electrical braking device 40 and the mechanical holding device 50.
- the control takes place via the control device 31 so that the electric braking device 40 takes over the deceleration of the machine 20 in a frictionless manner to a standstill or almost to a standstill, while the mechanical holding device 50 locks the machine 20 after reaching the standstill position or holds.
- This can be done by a positive or non-positive Connection done, for example by means of a running on the rotor 1 1 or the shaft of the machine 20 disc, are pressed against the brake pads on both sides.
- the control can be done, for example, electrically, mechanically, hydraulically or pneumatically. A slight deceleration from an almost stationary state of the work machine 20 to the absolute standstill can be taken over by the mechanical holding device 50, as stated above.
- the drive 10 is decelerated at the regulated ramp (frequency, voltage) of a feeding converter 13.
- This feeding converter 13, which supplies the motor of the drive 10 with power, is an electronic device and may be part of the drive 10, part of the working machine 20 or even a separate component.
- the electric motor of the drive 10 may be designed as a three-phase motor.
- the inverter 13 may include, in addition to the power supply, additional functions for motor control, such as a speed measurement and / or method of adjusting the rotating field depending on the current state of the machine.
- the inverter 13 includes a function for decelerating the work machine by adjusting the frequency and voltage to standstill or almost to a standstill of the work machine 20th
- the electric braking device 40 is set up so that in this case the converter 13 is galvanically separated from the motor of the drive 10, at the same time the motor windings via a braking resistor, a resistor / capacitor circuit or directly short-circuited or an external DC voltage source is switched. In this way, it is ensured in an emergency that the working machine 20 can be braked rapidly.
- the structure of the electric brake device 40 set forth above allows frictionless, ie, non-mechanical, deceleration of the work machine 20 not only in normal operation but also in the event of a disturbance of the feeding inverter 13.
- the total momentum of the work machine 20 and the drive 10 will be in all Operating conditions - for example, stop, quick stop, emergency stop, emergency stop - degraded or converted by the electric brake device 40.
- the mechanical holding device 50 now takes over in any case (even in an emergency) only the task of fixing the working machine 20 in the standstill position.
- the energy from the mechanical holding device 50 is not converted into heat.
- the mechanical holding device 50 can therefore be made very compact, since it does not have to convert kinetic energy in an emergency.
- the mechanical holding device 50 by no wear parts, at least finds a wear only to a small extent. This also prevents wear elements from the mechanical holding device 50 can penetrate into the drive 10.
- the mechanical holding device 50 is integrated in the housing of the drive 10 or flanged directly to this.
- the mechanical holding device 50 and the electric braking device 40 may be parts or modules of a motor construction kit for the drive 10.
- the stated drive 10 acts as a direct drive, whereby the complexity of conventional drive trains (consisting for example of an electric motor, an engine clutch incl. Brake, a reduction gear and a machine clutch) can be significantly reduced.
- the drive 10, in particular the stator 12 of the drive 10 is preferably located directly on or in the work machine 20.
- the stated drive 10 can be modular.
- the electric motor as a base module is expanded in this sense by the mechanical holding device 50 and the electric braking device 40 as modules.
- the drive 10 can be extended by further modules if necessary.
- Possible extension modules include, for example, a power increase module with drive means (rotor and stator) for increasing the power of the base module and / or a cooling module, which cools the drive and possibly parts of the working machine by means of a fan or a fluid cooling. So that the modules can be combined with each other, they have technically compatible components, in particular interconnectable or mutually flangeable housing. Such a modular construction can increase the repetition frequency of identical parts (motor disks, stator disks, stator laminations, stator coils, etc.), thereby reducing the cost and increasing the reliability of the apparatus.
- the drive according to the reference numerals 100 and 100 ' instead of the reference numeral 10 of Figure 1, to make it clear that the drive shown in Figure 1 an exemplary, albeit preferred drive is.
- This distinction applies analogously to the components of the drive provided with reference numerals, such as the stator 12 in FIG. 1 and the stator 120 in FIGS. 2 and 120 'in FIGS. 3 and 4.
- the detail 2a) schematically shows a transverse dividing shear 200. which is equipped with a drive 100, which has a linear electric motor. Shown is the cutting from top to bottom, conversely, the cutting from bottom to top is conceivable, which can offer advantages especially for thin to medium tape dimensions.
- the transverse dividing shear 200 has a frame 210, which is equipped with guides 220 in order to guide the knife carrier 230, which is embodied here as a knife carrier, along a cutting trajectory.
- the knife carrier 230 moves in the present embodiment along a vertically oriented straight cutting trajectory.
- the knife carrier 230 has a knife, which is designed here as a top knife 240.
- the upper blade 240 which comes into contact with the metal strip or sheet (not shown in the figure) to be cut to sever it along a transverse direction, does not necessarily have a rectilinear shape.
- the upper blade 240 in particular its cutting edge, may, for example, have an inclined or weak V-shape, as shown in the figure cut-out 2a), or any other suitable shape and condition, in order to achieve a clean cutting of the metal material.
- the upper blade 240 may also be multi-part. With the falling, generally movable, upper blade 240 cooperates a lower blade 250, which is formed stationary in the present embodiment.
- the lower blade 250 may optionally be designed to be movable, and its shape, like the upper blade 240, may be optimized with regard to the working condition and the cutting result.
- the knife carrier 230 may include an additional mass 260 to enhance the cutting result.
- the knife carrier 230 is driven by the drive 100, which is designed as a linear drive in the present embodiment.
- the drive 100 has a rotor 1 10, which cooperates with a stator 120.
- the rotor 1 10 is connected to the knife carrier 230, in this case also a direct, integral or even one-piece design is conceivable, so that the knife carrier 230 from the rotor 1 10 along the cutting trajectory is movable.
- the rotor 1 10 and the stator 120 cooperate, wherein the magnetic fields of the stator 120 and the magnetic fields of the rotor 1 10 are combined so that the rotor 1 10 is moved linearly.
- the cutting movement vertically down can here also the Use gravity to build up the necessary speed over a short distance.
- one or more dampers 280 are provided, which can be realized for example by means of a spring element. After the cut, the runner 1 10 is brought up to the starting position.
- a grid 270 is provided. This is realized in the present embodiment by way of example by means of a raster coil or a raster cylinder 271, a screen spring 273 and a movable ratchet pawl 272, which cooperates with a recess in the knife carrier 230.
- the exemplary structure of the grid 270 is apparent from the figure cutout 2b).
- the guide 220, the rotor 1 10, the stator 120, the damping 280 and the grid 270 are each provided in pairs to ensure a uniform weight distribution, power distribution and cutting.
- embodiments are possible in which the drive of the knife carrier 230 is realized in another way, in particular on one side.
- the transverse dividing shear 200 is used as a flying pair of scissors.
- the frame 210 of the scissors 200 is placed on a horizontally movable frame or forms itself a horizontally movable frame.
- This is preferably (but not necessarily) also equipped with a linear drive, which is referred to differentiate the above-mentioned linear drive 100 as a horizontal drive and in Figure 2, the reference numeral 290 carries.
- a linear drive which is referred to differentiate the above-mentioned linear drive 100 as a horizontal drive and in Figure 2, the reference numeral 290 carries.
- the drive is realized according to the embodiments of Figure 2 with electric linear motors, optionally additionally using the kinetic energy of the upper blade carrier 230 from the force of gravity for the separation process. Since such linear motors can realize high accelerations, the upper knife carrier 230 can reach a high speed in a relatively short distance in addition to the gravitational acceleration. Due to the high dynamics of the linear drive 100 short cutting intervals, thus short sheet metal sections with simultaneous compact dimension of the dividing shear 200 are possible. The stored energy and additionally the drive energy of the linear motor can be used for the separation process.
- the knife carrier 230 can be electrically braked by the linear motor and / or intercepted by damper 280.
- the passage height between the upper blade 240 and the lower blade 250 is preferably about 200 mm, but it can be increased if necessary. This leaves enough room for the acceleration process.
- the drive 100 drives the upper knife carrier 230 directly, without the interposition of a transmission, a clutch and the like. A piping of the machine is not required.
- FIG. 3 with its two figure cutouts 3a) and 3b) schematically shows a flying pair of scissors, in which the upper knife carrier 330 is connected via a shaft 320, preferably a crankshaft or eccentric shaft, by a drive 100 'which has a rotary electric motor with a stator 120' and a rotor 1 10 '(see Figure cutout 3b), is driven.
- the drive 100 ' may be formed as an internal rotor or external rotor. Shown is the cutting from top to bottom, conversely, the cutting from bottom to top or a combined cutting possible.
- the transverse dividing shear 300 has a frame 310, which carries a movable knife carrier 330, which is embodied here as a knife carrier.
- the knife carrier 330 is movable along a cutting trajectory, in the present embodiment along a vertically oriented linear cutting trajectory.
- the knife carrier 330 has a knife, which is designed here as a top knife 340.
- the upper blade 340 which comes into contact with the metal strip or sheet (not shown in the figures) to be cut to cut it along a transverse direction, may be of suitable shape and nature to achieve a clean cut of the metal material.
- a lower blade 350 cooperates, which is formed stationary in the present embodiment.
- the lower blade 350 may optionally be designed to be movable.
- the shapes and textures of the two knives 340, 350 may be optimized in view of the working environment and the desired cutting result.
- the knife carrier 330 is actuated via the shaft 320, which in turn is driven directly by the drive 100 '.
- the stator 120 ' is mounted directly on the frame 310 and / or the rotor 1 10' is connected directly to the shaft 320.
- the shaft 320 may be connected via a coupling to the rotor 1 10' of the drive 100.
- the drive 100 ' is preferably designed as a torque motor. The high torque of the drive 100 'accelerates the system from the state to the required speed and then delays again to a rest position. This eliminates the need for maintenance-intensive and sensitive components of conventional drive trains, such as the usual clutch / brake combination.
- FIG. 4 schematically shows a rocker arm 300 with double-sided drive 100 '. Also in this embodiment, the conventional powertrain is replaced by a direct drive. Due to the mechanical design of the scissors 300, however, a comb-roll transmission 360 is provided.
- the stators of the two drives 100 ' are connected directly to the frame 310.
- the rotors of the two drives 100 ' can alternatively or additionally via spindles and / or cardan shafts with the shaft or the shaft journal, which actuate the upper blade carrier 330, are connected.
- the drive can be designed both as a compact motor with its own bearings and bearingless when the rotor is firmly connected to the shaft or the clutch and thus shares their storage.
- the stator is preferably fixedly connected to the frame and thus uses the frame in addition to the heat dissipation. This can be dispensed with forced cooling with fans or even water in many cases.
- the so-called idle cutting device used especially in a rocker arm scissor can also be electrically operated, whereby complex hydraulic piping can be saved.
- a passage for media, such as hydraulic oil and / or cooling water is possible from the drive side, such as by appropriate lines are guided by the inner rotor or stator. The tight, integral connection between the drive and the machine allows a space-saving plant construction.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Forests & Forestry (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102017214415.7A DE102017214415A1 (de) | 2017-08-18 | 2017-08-18 | Direktantrieb bei einer elektrischen Querteilschere und fliegenden Schere in der Stahl/NE-Industrie |
| PCT/EP2018/072093 WO2019034679A1 (de) | 2017-08-18 | 2018-08-15 | Schere zur metallbearbeitung mit elektrischem direktantrieb |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP3668672A1 true EP3668672A1 (de) | 2020-06-24 |
Family
ID=63244604
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP18755800.2A Pending EP3668672A1 (de) | 2017-08-18 | 2018-08-15 | Schere zur metallbearbeitung mit elektrischem direktantrieb |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP3668672A1 (de) |
| DE (1) | DE102017214415A1 (de) |
| WO (1) | WO2019034679A1 (de) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102021210611A1 (de) | 2021-09-23 | 2023-03-23 | Sms Group Gmbh | Schere und Verfahren zum Schneiden von Schneidgut |
| CN115780888B (zh) * | 2022-12-13 | 2025-06-27 | 无锡奥特维智能装备有限公司 | 极片裁切装置 |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19648485A1 (de) * | 1996-11-22 | 1998-05-28 | Hans Dipl Ing Lindemann | Vorrichtung zum Schlagtrennen von Draht- und Stangenmaterial |
| DE202012005349U1 (de) * | 2011-12-01 | 2012-06-27 | Bkm Bolender Maschinenkonstruktion Gmbh | Querteilschere |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1856546A (en) * | 1929-08-10 | 1932-05-03 | Schloemann Ag | Shear for use in rolling mills, etc. |
| DE2611988A1 (de) | 1976-03-20 | 1977-09-29 | Schloemann Siemag Ag | Fliegende querteilschere fuer bleche |
| CN101602257A (zh) * | 2009-07-27 | 2009-12-16 | 吴德滨 | 磁电式冲压机 |
| CN101912995B (zh) * | 2010-06-29 | 2013-04-03 | 北方工业大学 | 高性能在线切断装置 |
| CN201824003U (zh) * | 2010-09-30 | 2011-05-11 | 黄道兴 | 一种直线电机剪板机 |
| CN203409337U (zh) * | 2013-08-06 | 2014-01-29 | 韩际平 | 直线电机驱动的剪板机 |
-
2017
- 2017-08-18 DE DE102017214415.7A patent/DE102017214415A1/de not_active Withdrawn
-
2018
- 2018-08-15 WO PCT/EP2018/072093 patent/WO2019034679A1/de not_active Ceased
- 2018-08-15 EP EP18755800.2A patent/EP3668672A1/de active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19648485A1 (de) * | 1996-11-22 | 1998-05-28 | Hans Dipl Ing Lindemann | Vorrichtung zum Schlagtrennen von Draht- und Stangenmaterial |
| DE202012005349U1 (de) * | 2011-12-01 | 2012-06-27 | Bkm Bolender Maschinenkonstruktion Gmbh | Querteilschere |
Non-Patent Citations (1)
| Title |
|---|
| See also references of WO2019034679A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2019034679A1 (de) | 2019-02-21 |
| DE102017214415A1 (de) | 2019-02-21 |
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