EP2796242B1 - Machine d'ébavurage et son procédé de réglage - Google Patents

Machine d'ébavurage et son procédé de réglage Download PDF

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Publication number
EP2796242B1
EP2796242B1 EP13191614.0A EP13191614A EP2796242B1 EP 2796242 B1 EP2796242 B1 EP 2796242B1 EP 13191614 A EP13191614 A EP 13191614A EP 2796242 B1 EP2796242 B1 EP 2796242B1
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EP
European Patent Office
Prior art keywords
brushes
brush
brush unit
machine
rotary
Prior art date
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Active
Application number
EP13191614.0A
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German (de)
English (en)
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EP2796242A2 (fr
EP2796242A3 (fr
Inventor
Sebastian Sauerbeck
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Arku Maschinenbau GmbH
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Arku Maschinenbau GmbH
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Priority to EP13191614.0A priority Critical patent/EP2796242B1/fr
Publication of EP2796242A2 publication Critical patent/EP2796242A2/fr
Publication of EP2796242A3 publication Critical patent/EP2796242A3/fr
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B27/00—Other grinding machines or devices
    • B24B27/033—Other grinding machines or devices for grinding a surface for cleaning purposes, e.g. for descaling or for grinding off flaws in the surface
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B29/00—Machines or devices for polishing surfaces on work by means of tools made of soft or flexible material with or without the application of solid or liquid polishing agents
    • B24B29/005—Machines or devices for polishing surfaces on work by means of tools made of soft or flexible material with or without the application of solid or liquid polishing agents using brushes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B47/00—Drives or gearings; Equipment therefor
    • B24B47/22—Equipment for exact control of the position of the grinding tool or work at the start of the grinding operation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B49/00—Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation
    • B24B49/16—Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation taking regard of the load

Definitions

  • the invention relates to a machine for deburring workpieces, which are preferably made of flat steel sheet.
  • the thickness of the workpieces can be a few millimeters or even more.
  • Known deburring machines such as from the EP-A2-1175 961 , Have horizontally circulating drive belts, which carry a plurality of juxtaposed brushes. These brushes usually consist of a fan-like package of sandpaper or sanding fleece.
  • the workpiece to be deburred is guided under or over the brushes, wherein the direction of movement of the brushes is transverse to the feed direction of the workpiece.
  • the exposed edges of the abrasive papers or abrasive webs stroke over the top or bottom of the workpiece and remove the protruding burrs. What is important is a certain pressure with which the flexible brushes strike over the surface of the workpiece, so that the brushes exert a certain frictional force on the workpiece and in particular on the ridges to be removed.
  • the invention proposes a special method and a correspondingly designed machine, which make it possible to measure the wear and to keep the contact pressure of the brushes constant by adjusting it become.
  • a method for measuring and adjusting the contact pressure of the brushes of a deburring machine according to the invention is defined in claim 9.
  • the contact pressure of the brushes or the achievement of the critical brush length is determined by determining sliding friction between the brushes and the reference turntable.
  • the reference turntable is rotatably mounted centrically and is retracted for measurement in the working area of the rotating brushes and extended again after the measurement.
  • the aim of the measurement is to determine the position of the brush unit in the vertical direction, when their brushes come into contact with the reference turntable and exert a certain frictional force on them, so that the reference turntable rotates.
  • This position of the brush unit is defined in the context of the present invention as a reference position. Since the reference position of the brush unit depends directly on the wear of the brushes, it is possible to deduce the actual length of the brushes.
  • the brushes are slowly brought down to the reference disk until the frictional forces exerted by the brushes on the reference turntable due to contact pressure are large enough to cause the reference turntable to rotate about its axis.
  • the brush unit is now in the reference position.
  • the drive belt and thus the brushes are driven, so that these one to execute horizontal orbital motion.
  • the drive of the drive belt for example via a pulley.
  • the reference position of the brush unit is measured by means of the measuring device relative to the machine stand. If such a measurement is carried out several times, ie with brushes having different degrees of wear, it is possible to conclude by comparing the determined layers (the reference layer) with the brush wear and the remaining brush length.
  • a first position detection of the brush unit is carried out with a sufficiently fast rotating reference turntable.
  • the position detection can be repeated after a certain predetermined period of use of the brushes.
  • Critical values for the reference position can be specified, above which a rapid or an immediate brush change is signaled.
  • the reference turntable Upon completion of the measurement, the reference turntable will again travel out of the working range of the brushes, i. she swings sideways. The machine is now ready for deburring of workpieces.
  • reference turntable refers to a component whose thickness is small compared to its width and length or compared to its radius.
  • the top and / or bottom of the reference turntable each span a reference plane with which the brushes at least partially come into contact.
  • the reference turntable is preferably circular and full-surface. However, it is also conceivable angularly form the reference turntable, for example as a square or polygon, and optionally with recesses.
  • reference travel refers to the process of moving a brush unit in the direction of the reference turntable until it rotates, detecting the reference position of the brush unit and subsequently retracting the brush unit away from the reference turntable.
  • the device is designed such that it moves the brush unit into a processing position in which the workpiece is deburred, this processing position being determined as a function of the previously detected reference position.
  • the brushes of the brush unit are positioned vertically to the workpiece such that by horizontally moving the brushes relative to the workpiece, all burrs on the surface of the workpiece to be machined can be removed.
  • the operator of the device preferably communicates the height of a tool located in the machine and an additional feed path.
  • One or both values can also be stored in the device.
  • the additional Zustetweg defines how far on a surface to be machined surface of the workpiece brushes are further moved vertically in the direction of the workpiece to produce a necessary for workpiece machining contact pressure or a necessary frictional force.
  • the device is designed to move the brush unit as a function of its detected reference position in the direction of a surface to be deburred of a workpiece located in the machine, so that the brushes exert the same pressure on the surface to be deburred as before on the reference turntable.
  • the corresponding distance between a non-wear affected part of the brush unit and the surface of the workpiece to be deburred can be adjusted using the detected reference position of the brush unit. This is possible because the reference position of the brush unit, the height of the workpiece and, by design, the position of the reference turntable are known relative to the workpiece.
  • the brush unit is brought further vertically into the processing position. This is done by the brush unit to the previously communicated to the device additional feed path is moved in the direction of the surface to be processed.
  • the predetermined feed path was determined in the course of experiments and is preferably several millimeters.
  • the applied in the processing position between the brush and workpiece now contact pressure is significantly higher than the brush pressure acting on a rotating reference turntable in the reference position of the brush unit.
  • the facility can u.a. a controller and at least one motor-driven spindle.
  • the driven spindle causes a process of the brush unit.
  • the motor responsible for driving the spindle is controlled by the controller.
  • the values communicated to the device, such as, for example, the workpiece height or the additional feed path, are preferably processed by the controller.
  • the machine has a continuous height, in which the workpieces to be deburred run through the machine.
  • the reference turntable is arranged at this passage height of the machine.
  • the term "passage height" is understood to mean the height of a bearing surface for the workpiece to be machined with respect to the ground on which the machine stands.
  • the workpiece to be machined rests on the support surface and is driven on it by the machine.
  • the flow height does not change during operation of the machine.
  • the neutral fiber of the reference turntable preferably lies at the passage height of the machine. For example, if the machine has two brush units arranged above and below the pass height, the reference turntable can be approached by both brush units.
  • the measuring device is preferably designed to measure the distance between the brush unit and the machine stand continuously. Thereby, the controller is aware of any vertical position of the brush unit relative to the machine stand. The controller can thus track traversing movements of the brush unit.
  • the position of the brush unit relative to the machine stand can also be indicated in relation to another reference plane, for example with regard to the passage height.
  • the electronic control is informed as to how far a brush-wear-independent part of the brush unit is from the passage height.
  • a brush wear independent component for example, the brush holder to which the brushes are attached.
  • Other components of the brush unit are also conceivable.
  • the controller is aware of the position of the brush unit relative to the machine stand due to the measuring device. By linking the data of the measuring device and the notified position of the brush unit relative to the passage height, the controller can relate the data of the measuring device with the position of the brush unit relative to the passage height in relation and convert each other. It is conceivable to display the position of the brush unit visually on a display.
  • the position indication can be displayed relative to the machine stand or in relation to the passage height. This allows the operator to easily monitor the travel of the brush unit.
  • the operator is also able to calibrate the deburring machine. This is preferably done after the insertion of new brushes by the operator manually moves the brush unit in the direction of the passage height until the lower brush ends have reached the flow height. Then he tells the electronic control the vertical position of the brush holder, relative to the passage height. This vertical position relative to the passage height corresponds to the length of the unworn brushes. It is understood that the travel of the brush unit as the position of the brush holder relative to the pass height can also be displayed to the operator on a display.
  • the calibration of the deburring machine with unworn brushes is particularly advantageous since the remaining brush length can be determined after a certain machine running time.
  • a reference run is performed. Since the position of the brush holder relative to the passage height is known by the prior calibration of the machine, and the position of the brush holder in the reference position of the brush unit relative to the passage height can be specified. At the same time, the distance between the reference turntable and the passage height is known by design. The difference between the vertical position of the brush holder relative to the passage height in the reference position of the brush unit and the distance between the reference turntable and the passage height gives the remaining brush length. Such a calculation can be carried out by the controller and, if necessary, visualized.
  • the controller can compare the length of fresh brushes used and the length of worn brushes, thus calculating the worn brush length.
  • a memory is provided, in which the calculated values, in particular the remaining brush length, are stored. This memory is then readable by the operator. Thus, the operator always sees which residual brush length was determined during the last homing run.
  • controller compares the remaining brush length with previously defined critical values and signals a rapid or immediate brush change when the critical values are not reached.
  • the brush unit can be moved exactly perpendicular to the reference turntable.
  • the reference turntable preferably extends transversely to the brushes.
  • the reference turntable thus provides the largest possible contact surface for the brushes when they are moved in the direction of the reference turntable.
  • a sensor which detects whether and optionally how fast the reference turntable rotates due to the friction between the brush and reference turntable. If a turning of the reference turntable is detected, the movement of the brush unit is stopped. The brush unit is now in the reference position.
  • the sensor is also able to detect the rotational speed of the reference turntable. This makes it possible to determine the difference between the speed of the driven drive belt or the brushes attached thereto and the speed of the rotating reference turntable. For example, the brushes stroke the reference turntable at a speed of 9 m / s.
  • the aim is to stop the movement at the lowest possible differential speed between the brush and the reference turntable. This ensures that not only individual brushes act on the reference turntable, but a large part of the brush exerts a frictional force on the reference turntable. This is significant because of the wear
  • the individual brushes may be different and therefore the individual brushes may have different brush lengths. By paying attention to the lowest possible differential speed, it is possible to deduce the average brush length.
  • the sensor can be designed as an inductive sensor. But it is also possible to use other sensor types.
  • the reference turntable is retractable by means of a motor drive in the working range of the brushes and extendable again.
  • An extension and retraction of the reference turntable can be done for example via a swinging and the same.
  • the drive allows the reference turntable to be automatically swiveled in and out of the work area of the brushes. A manual movement of the reference turntable and thus an interruption of the machine operation can thus be avoided.
  • the drive of the reference turntable is designed as an electrically, pneumatically or hydraulically driven lifting cylinder with a piston rod which is connected to a pivot bearing of the reference turntable in such a way that the reference turntable pivots in and out of the working range of the brushes.
  • Lift cylinders are low maintenance and have a high efficiency.
  • the reference turntable is preferably retracted or pivoted into the working area of the brushes.
  • the reference turntable can be extended or swiveled out of the work area of the brushes.
  • the machine has two brush units, one workpiece can be machined on both sides at the same time.
  • both the brushes of the upper and the brushes of the lower brush unit are subject to some wear.
  • an upper brush unit is arranged above the reference turntable and a lower brush unit below the reference turntable.
  • the device is designed to move the brush units offset in time from one another to the respective reference position.
  • the reference position of both brush units is detected separately. Since the reference positions of the brush units can only ever be detected individually when the reference turntable rotates, the two brush units are displaced in time in the direction of the swiveled reference turntable.
  • the upper side of the reference turntable forms a reference plane for the upper brush unit while the underside of the reference turntable represents a reference plane for the lower brush unit. It does not matter which brush units are first homed.
  • the method steps b) to e) are referred to as "reference travel".
  • the method steps a) and f) are carried out automatically before or after the reference run.
  • a reference travel is preferably carried out after a certain period of use of the brushes, so if they have a certain wear.
  • the duration of use, after which a reference run is performed again, should be selected so that the processing result is just acceptable. After expiry of the permissible service life and reaching the wear limit, a message can be displayed on the machine.
  • the homing run takes place only after the machine has been switched off beforehand and switched on again.
  • the workpiece is extended out of the machine after being processed. An operator then shuts off the machine. When switched on again, there is certainly no workpiece in the machine.
  • a reference run can then be carried out without problems. It is advantageous to provide a special safety circuit that checks whether a workpiece is in the machine before a reference run is performed.
  • a worker can also start a reference run manually if the processing result is no longer acceptable.
  • the reference position of the brush unit determined as part of a reference run is then preferably used for positioning the brush unit relative to the workpiece to be machined.
  • an operator inputs the thickness of the workpiece to be processed and the additional feed path into the electronic control.
  • the additional feed path defines how far brushes resting on a surface of the workpiece to be machined are moved further in the direction of the workpiece in order to produce a contact pressure or a necessary frictional force necessary for workpiece machining.
  • the controller determines the processing position of the brush unit as a function of the reference position. In this machining position, the brushes of the brush unit are positioned vertically to the workpiece such that by horizontally moving the brushes relative to the workpiece, all burrs on the surface of the workpiece to be machined can be removed. Then the brush unit is fully automatically moved from a rest position to the processing position. The contact pressure required for machining the workpiece then lies between the brushes and the surface of the workpiece to be machined. The machining of the workpiece can begin.
  • the procedure is as already described with reference to the machine according to the invention.
  • the brush unit is moved from a rest position in the direction of a surface to be deburred of the workpiece in dependence on the reference position of the brush unit.
  • the altitude of the reference turntable relative to the passage height - and thus also to the position of the surface to be machined of the workpiece - is known.
  • the brush unit can be moved down just as far on the surface to be processed as in the reference travel relative to the reference turntable.
  • the brushes then exert the same pressure on the workpiece to be machined as before on the reference turntable.
  • the brush unit is then moved to the previously entered additional feed path further in the processing position to ensure optimum machining of the workpiece surface. How big the additional travel is was determined in experiments or is known from experience.
  • the travel of the brush unit can be visually displayed to the operator.
  • the travel can be optionally specified in relation to the machine stand, in relation to the passage height or as the distance of the brush holder to the passage height.
  • each cycle includes a reference run.
  • the steps a) and f) take place before the start of the first homing run or after the end of the second homing run. It does not matter in which order the reference runs of the two brush units are performed. For example, during its reference travel, the upper brush unit comes into contact with the upper side of the reference turntable and the lower brush unit comes into contact with the underside of the reference turntable.
  • the signaling can be done optically or acoustically. It is conceivable to equip the machine with a display on which such a signal is visually displayed.
  • the position of the reference turntable relative to the machine stand is fixed. Based on a reference journey with new, not yet worn brushes, so can be easily defined a critical value for the vertical position relative to the machine stand, when exceeded, a warning is given. For example, in a later reference run this critical value is compared with the currently measured relative to the machine frame reference position of the brush unit.
  • the critical value can also be stored in the control, so that no reference travel with unworn brushes is necessary. It is tantamount to specifying the criteria for triggering a warning in relation to the run height. In this case, a speedy brush change is signaled when the position of the brush unit falls below a critical path relative to the passage height.
  • the need for a brush change is signaled when the reference position of the brush unit relative to the machine stand exceeds a predetermined maximum value.
  • a predetermined maximum value an insufficient processing result of the workpiece to be deburred is excluded. It is tantamount to specifying the criteria for triggering a warning in relation to the run height.
  • an early brush change is signaled when the reference position of the brush unit falls below a predetermined minimum path relative to the passage height.
  • the machine 1 of FIG. 1 used for deburring workpieces, in particular made of flat sheet workpieces.
  • the machine 1 comprises a stationary machine stand 2, which carries movable components 3.
  • the machine 1 further comprises an upper brush unit 4 and a lower brush unit 5, which are arranged so as to be vertically displaceable relative to the machine stand 2 via motor-driven mechanical spindles 6.
  • An electronically programmable controller 7 is provided which controls the movements of the two brush units 4, 5. The spindles 6 and the controller 7 thus form a device for moving the brush units 4, 5.
  • Each of the brush units 4, 5 has an endlessly circulating drive belt 8 which is driven by a pulley (not shown).
  • a plurality of brush holders 9 are fixed, on each of which a brush 10 for deburring the workpieces sit.
  • the brushes 10 are formed as a packet-like layers of abrasive paper or abrasive fleece.
  • a measuring device 11 is provided which detects the vertical position of the upper brush unit 4 relative to the machine stand 2. The same applies to the lower brush unit 5, the height position of which is measured relative to the machine frame 2 via a second measuring device (not shown).
  • the machine 1 has a passage height 12, run on the workpieces to be machined through the machine 1 therethrough. Above the passage height 12 is the upper brush unit 4, below the passage height 12, the lower brush unit 5 is arranged.
  • a reference turntable 13 is provided, which is retractable into the working area of the brush 10.
  • the reference turntable 13 has an upper side 14 and a lower side 15.
  • the upper side 14 forms a first reference plane 16 for the brushes 10 of the upper brush unit 4
  • the lower side 15 forms a second reference plane 17 for the brushes 10 of the lower brush unit 5.
  • the brush units 4, 5 are perpendicular to the reference turntable 13 vertically fed so far to the reference turntable 13 until the brush unit has reached a reference position.
  • the brushes 10 touch the top or bottom 14 and 15 of the reference turntable 13 and exert a certain pressure on the reference turntable 13 from. Due to the pressure and the movement of the brushes 10 transversely to the reference turntable 13, a frictional force is generated between the reference turntable 13 and brushes 10 which rotate the reference turntable 13 added.
  • the brushes 10 move horizontally at a speed of about 9 m / s.
  • the measuring device 11 detects the vertical position of the brush units 4, 5, ie the reference position of the brush unit 4, 5 relative to the machine stand 2.
  • the reference turntable 13 can always be rotated only by a brush unit 4, 5. Therefore, the control is carried out so that the brush units 4, 5 successively time on the reference turntable 13, until the respective reference position is reached.
  • FIG. 2 the reference turntable 13 is shown in detail. It is rotatably supported by means of a shaft 18 on an arm 19 and can rotate about an axis of rotation 20.
  • the arm 19 forms a pivot bearing for the reference turntable 13th
  • the shaft 18 has on a reference turntable 13 remote from the end 21 to a rotor 22 which is fixedly connected to the shaft 18.
  • a rotor 22 Upon rotation of the reference turntable 13 about the axis of rotation 20, the rotor 22 rotates.
  • An inductive sensor 23 is also secured to the arm 19 by means of a sensor holder 24. The sensor 23 detects the rotational movement of the rotor 22 and thereby detects whether and how fast the reference turntable 13 due to the friction between brushes 10 (FIG. FIG. 1 ) and the reference turntable 13 rotates.
  • the arm 19 is rotatably connected via a bearing support 25 with a base plate 26. It can be pivoted relative to the base plate 26 about a pivot axis 27.
  • the base plate 26 is by means of fastening means 28 on the machine frame 2 ( FIG. 1 ) attached.
  • a receptacle 29 Also rotatably connected to the base plate 26 is a receptacle 29. It is rotatable relative to the base plate 26 about a pivot axis 30. At an upper end 31 of the receptacle 29 designed as a cylinder 32 drive with a piston rod 33 is arranged.
  • the cylinder 32 is pneumatically actuated. It is understood that the cylinder 32 may also be an electrically or hydraulically actuable cylinder.
  • the piston rod 33 of the cylinder 32 is connected via an angle piece 34 with the arm 19 and thus with the pivot bearing of the reference turntable 13 such that the reference turntable 13 by actuation of the cylinder 32 in the working area of the brushes 10 (FIGS. FIG. 1 ) can be swung in and out.
  • bearing support 25 and the receptacle 29 also connect directly to the machine stand 2. In this case, eliminates the base plate 26th
  • the rotatably mounted reference turntable 13 is pivoted into the working area of the brushes 10. This is done by the cylinder 32 is actuated and the piston rod 33 extends out of the cylinder 32. As a result, the cylinder 32 pivots the arm 19 together with the reference turntable 13 about its pivot axis 27 in the direction of the brushes 10.
  • the upper brush unit 4 is moved to the top 14 of the reference turntable 13 and thus to the reference plane 16 until the reference position is reached.
  • the brushes 10 touch the reference turntable 13 and exert a certain pressure on them.
  • the movement of the upper brush unit 4 is perpendicular to the reference turntable 13.
  • the drive belt 8 of the upper brush unit 4 is driven, which is why the brush 10 of the upper brush unit 4 move parallel to the top 14 of the reference turntable 13.
  • a third step the rotation is detected and the rotational speed of the reference turntable 13 is measured. This is done by means of the inductive sensor 23, which measures the rotation of the rotor 22 and thus the rotation of the reference turntable 13.
  • the height position of the upper brush unit 4, ie the reference position of the brush unit 4, relative to the machine stand 2 is measured. This is done by means of the measuring device 11. Based on the data of the measuring device 11, the height position of the brush unit 4 can also be specified in relation to the passage height of the machine 1. For this purpose, the controller 7 was informed during the first start-up of the machine 1 how far a non-wearing part of the brush unit 4, for example the brush holder 9, is removed from the passage height 12. Based on this information, the controller 7 is able to convert the values supplied by the measuring device 11 into those with reference to the passage height 12.
  • the position of the brush unit 4 with a sufficiently fast rotating reference turntable 13 is compared with the passage height 12 by means of the reference height R (FIG. FIG. 3 ).
  • the reference height R extends from the passage height 12 to a reference point located on a part of the brush unit 4, 5 which is not affected by wear. Such a non-wear affected part of the brush unit 4, 5 may be the brush holder 9.
  • the machine 1 has a display on which the position of the upper brush unit 4 is displayed. It is synonymous, whether the position of the brush unit 4 relative to the machine frame 2 or relative to the passage height 12 is indicated.
  • the brushes 10 are removed again from the reference turntable 13 after the measuring run is completed. As a result, the reference turntable 13 is released.
  • the controller 7 is now able to calculate and set the optimal working position of the brush 10.
  • step b) deviating the lower brush unit 5 against the bottom 15 of Reference turntable 13 as the reference plane 17 until the brush 10 touch the reference turntable 13 and exert a certain pressure on this.
  • the operator inputs the height s of a workpiece 36 located in the machine 1 and an additional feed path into the controller 7.
  • the additional feed path defines how far brushes 10 resting on a surface 37 to be machined of the workpiece 36 are moved further in the direction of the workpiece 36 in order to produce a contact pressure necessary for workpiece machining or a necessary frictional force.
  • the brush unit 4, 5 moves in a processing step to a processing position in which the brushes 10 of the brush unit 4, 5 are positioned vertically to the workpiece 36 such that by horizontally moving the brushes 10 relative to the workpiece 36 all ridges on the surface to be machined 37 of the workpiece 37 can be removed.
  • the processing position is determined by the controller 7 as a function of the previously detected reference position of the brush unit 4, 5. How this is implemented by the machine 1 in detail, will be explained below.
  • the brush units 4, 5 After entering the workpiece height s and the additional feed path, the brush units 4, 5 are moved in the direction of the surface to be deburred 37 of the workpiece 36 until the brush 10 exert the same pressure on the surfaces to be deburred 37 as before on the reference turntable in the reference position of Brush unit 4, 5.
  • the control 7 the previously determined reference position of the brush unit 4, 5, the position of the reference turntable 13 relative to the pass height 12 and the height s of the workpiece 36 knows, they can calculate the necessary travel path of the brush units 4, 5. In this case, it is equivalent whether the calculation of the delivery travel of the brush units 4, 5 takes place relative to the machine frame 2 or with respect to the passage height 12.
  • the brush units 4, 5 In order to achieve the machining position and, in order to enable optimum machining of the workpiece 36, the brush units 4, 5 must be moved several millimeters further, namely by the additional feed path in the direction of the workpiece 36 to be deburred.
  • the additional feed path is independent of the wear of the brushes 10 and was determined on the basis of tests and / or empirical values.
  • the brushes 10 in the machining position exert on the surface 37 of the workpiece 36 a contact pressure which is significantly higher than the pressure which previously acted on the reference turntable 13 in the reference position of the brush unit 4, 5. Due to the pressure built up with the aid of the additional delivery and the consequent frictional force, all burrs located on the surface 37 to be processed can be removed.
  • FIG. 4 is a brush 10 of the upper brush unit 4 in the machining position, ready for machining the workpiece 36, shown.
  • the workpiece 36 with the height s is located at the passage height 12 of the machine 1.
  • the upper brush unit 4 is moved so far that the lower end 35 of the brush 10 is slightly below the surface to be machined 37 of the workpiece 36. If the brush 10 now passes over the surface 37, the desired contact pressure or the desired frictional force acts on the workpiece 36.
  • the processing position of the upper brush unit 4 and thus of the brush 10 was determined as a function of the reference height R, the distance R s and the workpiece height s calculated. In addition, the delivery specified by the operator was also taken into account.
  • the machine 1 indicates the necessity of an early brush change when, during a reference run, the position of the brush units 4, 5 relative to the machine stand 2 exceeds a predetermined critical value.
  • the need for an immediate brush change is signaled when the reference position of the brush units 4, 5 relative to the machine stand 2 exceeds a second critical value.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)

Claims (15)

  1. Machine d'ébavurage de pièces usinées (36), en particulier de pièces usinées (36) fabriquées à partir d'une tôle plane, par brossage ou meulage, comprenant :
    un montant de machine stationnaire (2);
    au moins un ensemble de brosses (4, 5) qui peut être déplacé verticalement par rapport au montant de machine (2), comprenant :
    une courroie d'entraînement (8) tournant sans fin;
    une multiplicité de porte-brosses (9) fixés sur la courroie d'entraînement (8);
    des brosses (10) servant à l'ébavurage des pièces usinées (36), en particulier sous forme de couches - disposées en paquet - de papier abrasif ou de toile abrasive non tissée, couches qui sont placées sur les porte-brosses (9);
    caractérisé par :
    un disque rotatif de référence (13), monté en rotation, qui peut entrer dans la zone de travail des brosses (10), où un dessus (14) et/ou un dessous (15) du disque rotatif de référence (13) forme un plan de référence (16, 17) pour les brosses (10);
    un dispositif (6, 7) servant au déplacement vertical de l'ensemble des brosses (4, 5) dans une position de référence dans laquelle les brosses (10) sont contiguës au plan de référence (16, 17) et exercent une pression déterminée sur le disque rotatif de référence (13), faisant qu'une force de frottement est produite entre le disque rotatif de référence (13) et les brosses (10), force de frottement qui met en rotation le disque rotatif de référence (13);
    un dispositif de mesure (11) qui détecte la position de référence de l'ensemble des brosses (4, 5).
  2. Machine selon la revendication 1, ayant une autre caractéristique suivante:
    le dispositif (6, 7) est conçu, de sorte qu'il déplace l'ensemble des brosses (4, 5) dans une position de traitement dans laquelle la pièce usinée (36) est ébavurée, où cette position de traitement est déterminée en fonction de la position de référence détectée auparavant.
  3. Machine selon l'une quelconque des revendications précédentes, ayant une autre caractéristique suivante :
    le disque rotatif de référence (13) est disposé dans une hauteur de passage (12) des pièces usinées (36) à ébavurer.
  4. Machine selon l'une quelconque des revendications précédentes, ayant une autre caractéristique suivante :
    l'ensemble des brosses (4, 5) peut être déplacé perpendiculairement au disque rotatif de référence (13).
  5. Machine selon l'une quelconque des revendications précédentes, ayant une autre caractéristique suivante :
    un capteur (23) qui identifie si et, facultativement, à quelle vitesse le disque rotatif de référence (13) tourne sous l'effet du frottement entre les brosses (10) et le disque rotatif de référence (13).
  6. Machine selon l'une quelconque des revendications précédentes, ayant une autre caractéristique suivante:
    le disque rotatif de référence (13) peut être déplacé dans et hors de la zone de travail des brosses (10) au moyen d'un entraînement (32).
  7. 7. Machine selon la revendication 6, ayant une autre caractéristique suivante:
    l'entraînement est un vérin (32) entraîné électriquement, pneumatiquement ou hydrauliquement, comprenant une tige de piston (33) qui est reliée à un coussinet de pivotement (19) du disque rotatif de référence (13), pour pivoter le disque rotatif de référence (13) dans et hors de la zone de travail des brosses (10).
  8. Machine selon l'une quelconque des revendications précédentes, ayant une autre caractéristique suivante:
    un ensemble de brosses supérieur (4) disposé au-dessus du disque rotatif de référence (13) et un ensemble de brosses inférieur (5) disposé au-dessous du disque rotatif de référence (13), où le dispositif est conçu pour déplacer, dans la position de référence respective, les deux ensembles de brosses (4, 5) l'un après l'autre dans le temps.
  9. Procédé de mesure et de réglage de la pression d'appui des brosses d'une machine d'ébavurage selon l'une quelconque des revendications précédentes, comprenant les étapes suivantes :
    a) le pivotement vers l'intérieur d'un disque rotatif de référence (13) monté en rotation dans la zone de travail des brosses mobiles (10);
    b) le déplacement vertical lent de l'ensemble des brosses (4, 5) dans une position de référence dans laquelle les brosses (10) sont au contact du disque rotatif de référence (13) et exercent une pression déterminée sur celui-ci, faisant que le disque rotatif de référence (13) est mis en rotation;
    c) la détection de la rotation du disque rotatif de référence (13);
    d) la détection de la position de référence de l'ensemble des brosses (4, 5);
    e) le retour des brosses (10) s'éloignant du disque rotatif de référence (13);
    f) le pivotement du disque rotatif de référence (13) hors de la zone de travail des brosses (10) après achèvement du trajet de mesure.
  10. Procédé selon la revendication 9 comprenant une autre étape suivante :
    g) le déplacement d'un ensemble de brosses (4, 5) dans une position de traitement dans laquelle la pièce usinée (36) est traitée, où la position de traitement est déterminée en fonction de la position de référence détectée auparavant.
  11. Procédé selon l'une des revendications 9 ou 10, où la vitesse de rotation du disque rotatif de référence (13) est mesurée au cours de l'étape c).
  12. Procédé selon l'une quelconque des revendications 9 à 11, où sont réalisées d'abord, comme premier cycle, les étapes de procédé b) à e) avec l'un des ensembles de brosses (4) et, ensuite, comme second cycle, les étapes de procédé b) à e) avec l'autre ensemble de brosses (5).
  13. Procédé selon l'une quelconque des revendications précédentes, où la position de référence de l'ensemble des brosses (4, 5) est mesurée par rapport au montant de la machine, au cours de l'étape d).
  14. Procédé selon la revendication 13, comprenant une autre étape suivante:
    h) le signalement de la nécessité d'un proche changement de brosses quand, au cours de l'étape d), la position de référence de l'ensemble des brosses (4, 5) par rapport au montant de machine (2) dépasse la limite supérieure d'une valeur critique prédéterminée.
  15. Procédé selon l'une des revendications 13 ou 14 comprenant une autre étape suivante:
    i) le signalement de la nécessité d'un changement de brosses immédiat quand, au cours de l'étape d), la position de référence de l'ensemble des brosses (4, 5) par rapport au montant de machine (2) dépasse la limite supérieure d'une deuxième valeur critique.
EP13191614.0A 2013-04-22 2013-11-05 Machine d'ébavurage et son procédé de réglage Active EP2796242B1 (fr)

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CN106272001A (zh) * 2015-05-13 2017-01-04 王勤 一种钢丝绳除锈设备
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US20220219276A1 (en) * 2021-01-12 2022-07-14 S.I.T. Societa' Italiana Tecnospazzole S.p.A. Method for measuring operating parameters of a machining of a surface and a device for measuring operating parameters

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