EP2030515B1 - Method and device for grinding cutting blades - Google Patents

Method and device for grinding cutting blades Download PDF

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Publication number
EP2030515B1
EP2030515B1 EP08014676A EP08014676A EP2030515B1 EP 2030515 B1 EP2030515 B1 EP 2030515B1 EP 08014676 A EP08014676 A EP 08014676A EP 08014676 A EP08014676 A EP 08014676A EP 2030515 B1 EP2030515 B1 EP 2030515B1
Authority
EP
European Patent Office
Prior art keywords
rotation
grinding wheel
speed
cutting blade
grinding
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.)
Not-in-force
Application number
EP08014676A
Other languages
German (de)
French (fr)
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EP2030515A3 (en
EP2030515A2 (en
Inventor
Hans-Jürgen Steiner
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Koerber Technologies GmbH
Original Assignee
Hauni Maschinenbau GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hauni Maschinenbau GmbH filed Critical Hauni Maschinenbau GmbH
Priority to PL08014676T priority Critical patent/PL2030515T3/en
Publication of EP2030515A2 publication Critical patent/EP2030515A2/en
Publication of EP2030515A3 publication Critical patent/EP2030515A3/en
Application granted granted Critical
Publication of EP2030515B1 publication Critical patent/EP2030515B1/en
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Anticipated expiration legal-status Critical

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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
    • B24B3/00—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools
    • B24B3/36—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools of cutting blades
    • B24B3/368—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools of cutting blades installed as an accessory on another machine
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24C—MACHINES FOR MAKING CIGARS OR CIGARETTES
    • A24C5/00—Making cigarettes; Making tipping materials for, or attaching filters or mouthpieces to, cigars or cigarettes
    • A24C5/14—Machines of the continuous-rod type
    • A24C5/28—Cutting-off the tobacco rod
    • A24C5/30—Machines combined with devices for grinding the knives
    • 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
    • B24B3/00—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools
    • B24B3/36—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools of cutting blades
    • B24B3/46—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools of cutting blades of disc blades
    • 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
    • B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D7/08—Means for treating work or cutting member to facilitate cutting
    • B26D7/12—Means for treating work or cutting member to facilitate cutting by sharpening the cutting member

Definitions

  • the invention relates to a cigarette manufacturing and / or filter attachment machine with a device for. Grinding rotary cutting knives for cutting rod-shaped articles in the tobacco processing industry, comprising at least one rotating grinding wheel. Furthermore, the invention relates to a method of grinding rotary cutting knives for cutting rod-shaped articles in cigarette manufacturing and / or filter attachment machines of the tobacco processing industry, wherein at least one rotating grinding wheel can be brought into touching abrasive engagement with the cutting blade.
  • This document shows a device for grinding fixed-axis rotation measuring instruments which operate in cigar packing machines and comprises a pair of coaxial grinding wheels, each having a rotational axis have corresponding distance from each other and are arranged obliquely to the plane of the rotary blade to be ground, rotatable about its own axis and positioned relative to the rotary knife.
  • the grinding wheels are supported by a support which is movable along a straight path parallel to the plane of the rotary knife and is displaced by drive means serving as an actuator which are controlled by automatic and programmable control and drive means according to wear or reduction of the degree of rotation of the rotary knife depend.
  • the known grinding apparatus has scanning means capable of indicating the state of complete wear of the rotary knife corresponding to the minimum diameter for use of the rotary knife to cause the drive means to stop in this case.
  • the scanning means respond to a predetermined end position of the support and therefore serve as a limit switch, which prevents further advancement of the support and thus the grinding wheels and thereby simultaneously indicates a signal for the end of the diameter of the rotary knife.
  • control and drive means of the known device can also be programmed not only on the basis of the assumed wear or the reduction of the degree of rotation of the rotary knife, but after the detected wear of the rotary knife;
  • scanning means could be provided, which detect the change in the angular velocity of the grinding wheels, which is due to a partial loss of adhesion to the grinding blade to be ground.
  • the DE 33 24 262 C2 describes a device for sharpening rotary cutting blades, in which the sharpening is to be done automatically depending on the wear.
  • the wear is to be determined by the fact that the contact pressure of the grinding wheel is determined indirectly by detecting the rotational speed of the cutting blade, with which the grinding wheel is in touching loop engagement.
  • the EP-B 1 213 105 The applicant describes a cutting device and a method for changing cutting means, in which inter alia, an optical instrument, such as a laser diode is provided, which determines the diameter or the edge of the knife.
  • an optical instrument such as a laser diode
  • the DE-OS 102 05 146 discloses an optical scanning device for determining the wear on the cutting blade.
  • a production release signal is only generated when the grinding wheel has reached a predefinable percentage of a desired rotational speed or actual rotational speed of the cutting blade that can be adapted to the individual conditions of the respective device.
  • the rotational speed of the grinding wheel neither detected nor compared with a desired rotational speed or actual rotational speed of the cutting blade.
  • the invention has further recognized that this independence of the production release of the aforementioned speed ratio can lead to the fact that the production of the rod-shaped article is also released or if the rotational speeds of the cutting blade and grinding wheel differ from each other so that it is insufficient Grinding the knives and thus resulting in insufficient sharpness of the knife, which in turn has an unclean cut and consequently unclean or poorly cut rod-shaped items in the production result. This possible loss of quality in the finished products must not be tolerated thanks to the present invention.
  • the grinding wheel with its rotational or peripheral speed at least compared to a desired quality requirements ensuring target rotational speed, preferably to a desired rotational speed of the cutting blade, more preferably to an actual rotational speed of the cutting blade must reach before the production is released by the production release signal according to the invention.
  • target rotational speed preferably to a desired rotational speed of the cutting blade
  • more preferably to an actual rotational speed of the cutting blade must reach before the production is released by the production release signal according to the invention.
  • the invention proves to be particularly advantageous if the device for grinding, for example, had to be stopped due to a change of the cutting blade or the grinding wheel that had become necessary and is raised again after the change has taken place.
  • the rotational speed of the cutting blade and thus also the adjacent grinding wheel is granted production approval only after reaching the desired percentage.
  • the signal generating device is expediently connected to a production release device for releasing the production, so that the production release device, which is provided, for example, in the associated cigarette manufacturing or filter attachment machine, can release the production if it has received the production release signal from the signal generating device.
  • the detection of the rotational speed of the grinding wheel takes place in that the measuring device has a clock provided on the grinding wheel and an associated, stationary mounted sensor for detecting the clock.
  • the grinding wheel has as clock at least one area with respect to the other grinding disc deviating material thickness.
  • This range of deviating material thickness is preferably made available by providing a timing disk on one of the end faces of the grinding wheel, which may be designed as a double grinding wheel.
  • This timing disk is preferably made of a rectangular plate, preferably made of stainless steel.
  • the associated sensor for interrogating such a timing disk can be designed, for example, as a proximity switch, in particular as an inductive sensor, and can preferably be fastened directly to the grinding wheel receptacle.
  • the grinding wheel normally does not have its own drive, but is driven by the friction with the cutting blade by the rotational movement of the cutting blade. However, it is also possible according to the invention to provide the grinding wheel with its own drive.
  • FIG. 1 schematically a front view of a filter attachment machine of the type "MAX" of the applicant is shown, the details of which are explained below.
  • An inlet drum 1 transfers the cigarettes produced on a cigarette manufacturing machine, not shown in detail in FIG. 2, to two Squatter drums 2, which graduate the staggered cigarettes and deliver in rows of two each with a space between the cigarettes to a compilation drum 3.
  • filter rods arrive from a magazine 4 on a cutting drum 6, cut there to filter plug twice the length of use, staggered on a staggering drum 7, aligned by a sliding drum 8 to a series of consecutive plugs and an accelerator drum 9 in the spaces between the cigarette rows the compilation drum 3 stored.
  • the thus aligned cigarette filter cigarette groups are pushed together and taken over by a transfer drum 11.
  • a covering paper strip 12 drawn off from a tipping paper bobbin 13 is glued by a gluing device 14 and then cut in a cutting device 16 on a cutting drum 17 by the knives of a knife drum 18 into covering tufts not shown in detail.
  • the separated pad sheets are adhered to the cigarette filter-cigarette groups on the transfer drum 11 and rolled on a roller drum 19 around the cigarette filter groups.
  • the finished double-filter cigarettes are fed via a drying drum 21 to a cutting drum 22 and assembled thereon by means of central cutting through the filter plugs to individual filter cigarettes not shown in detail.
  • a turning device 23 applies a series of filter cigarettes and transfers them simultaneously into a continuous unswept filter cigarette line.
  • the filter cigarettes reach an ejector drum 26.
  • a cooperating with a brake drum 27 Ablegertrommel 28 sets the filter cigarettes not shown in detail on a Ablegerband 29th
  • the cutting drums 6 and 22 are associated with circular blades 30, namely the cutting drum 6 two circular blades 30 and the cutting drum 22 a circular blade 30.
  • the cutting edges forming the peripheral edge of the circular blades 30 lose their sharpness during their operation. Such wear of the circular blade 30, however, adversely affects the Manufacture of cigarettes, since in such a case, the desired clean cut can not be guaranteed.
  • the circular knives are assigned grinding wheels with which the circular knives are reground regularly.
  • a grinding wheel 32 is shown positioned adjacent to the circular blade 30 associated with the cutting drum 22.
  • Usually two parallel grinding wheels are provided, which are employed with respect to the circular blade 30 a little twisted.
  • Delivered to the circular blade 30, the grinding wheels 32 by means of an actuator 34.
  • Such consisting of grinding wheels and actuator grinding device is also provided for the cutting drum 6 associated circular blade 30, but for reasons of clarity in FIG. 1 not shown in detail.
  • FIG. 2 an arrangement of cutting drum 22, circular blade 30, grinding wheels 32 and actuator 34 is shown in an enlarged schematic representation, in which case only one grinding wheel 32 can be seen from the two grinding wheels. Also are in FIG. 2 along the circumference of the cutting drum 22 axially arranged double filter cigarette C recognizable, which are cut by the circular blade 30 by the cut, as already mentioned above, takes place centrally through the filter, not shown in detail.
  • the cutting edge of the circular knife 30 is monitored online with an optical sensor 36, which transmits an electrical output signal to a control device 38, which controls the actuator 34. If the optical sensor 36 indicates sufficient sharpness, the circular blade 30 is not ground, ie the control device 38 controls the actuator 34 in such a way that the grinding wheels 32 remain disengaged from the circular blade 30. Only when the optical sensor 36 registers a blunt, the controller 38 controls the actuator 34 so that they move the grinding wheels 32 in the direction of the circular blade 30 until they come into touching loop engagement with the cutting edge of the circular blade 30. On in this way, the circular blade 30 is reground, but only until the required sharpness is reached again.
  • the controller 38 controls the actuator 34 so that the grinding wheels 32 are again disengaged from the circular blade 30, and deactivates if necessary then the actuator 34th
  • FIG. 2 shown arrangement of grinding wheels 32, actuator 34, optical sensor 36 and control device 38 thus forms a closed loop, which provides not for a continuous grinding wheel feed, but only when needed for a grinding wheel feed by the actuator 34. Accordingly, the grinding wheels 32 are delivered only after detecting a dulling of the circular blade 30 by means of the optical sensor 36 and a regrinding of the circular blade 30 takes place only when needed. In this way it is possible to achieve a maximum service life of the circular blade 30. An adaptation to the driven material takes place automatically.
  • FIG. 1 illustrated machine, a grinding device with an arrangement similar to that of FIG. 2 also provide for the cutting drum 6 associated circular blade 30.
  • FIG. 3 shows an embodiment of a grinding wheel according to the invention 32.
  • the grinding wheel 32 has a central bore 39, in which a in the FIG. 5 shown shaft 40 for holding the grinding wheel 32 can be inserted.
  • a timer 45 designed as a stainless steel sheet is provided in a region 44 between the bore 39 and a rim 41 as a region of increased material thickness.
  • the clock 45 is integrally formed and has in its center a hole for attachment to the grinding wheel 32 and for mounting on the below with respect to FIG. 5 described shaft 40 of the holding device 48 for holding the Grinding wheel 32 on.
  • the clock 45 has for its function as a clock in particular two pointing in the direction of the edge 41 of the grinding wheel 32 areas 46 and 46 a, which from a further below with respect to the FIG. 5 described sensor 60 can be detected.
  • FIG. 4 shows the embodiment of the FIG. 3 in a further schematic and perspective view in a holding device according to FIG. 5 ,
  • the holding device will be described below with reference to FIG FIG. 5 described in more detail.
  • FIG. 4 already shows that a sensor 60 serving to detect the timer 45 is adjacent to the grinding wheel 32 in accordance with FIG FIG. 4 is designed as a double grinding wheel, it is arranged that the sensor 60 upon rotation of the grinding wheel 32 a Vorbeistilles of in FIG. 4 detected visible range 46 of the clock 45 and also on further rotation can detect a past range of the range 46a of the clock 45 in its function as a proximity switch.
  • the thus emitted by the sensor 60 clock signals can be resolved, for example, with a resolution of 200 ns, so that in this way the time per revolution of the grinding wheel 32 can be measured very accurately and from this very quickly and very accurately the speed or the rotational speed of the Grinding wheel 32 can be determined.
  • FIG. 5 shows a holding device 48 for holding a grinding wheel 32 or 32 on a mounted on an L-shaped bracket 50 shaft 40.
  • the bracket 50 is in turn via a shaft 52 rotatably connected to the housing 54 of a Zigarettenher eins- or a Filteransetzmaschine, for example Filter attachment machine according to Fig. 1 , connected.
  • a holding plate 56 is attached, which has a bore in which by means of a nut 58, an inductive sensor 60 is set as a proximity switch.
  • the sensor 60 detects the areas provided by the timing disk 45 higher Material thickness 46 and 46a of the grinding wheels 32, 32a and outputs corresponding signals via a line 61 to a measuring device 62 for determining the rotational speed of the grinding wheel 32, 32a from the signals of the sensor 60 from.
  • a comparison device 64 connected to the measuring device 62, the determined rotational speed of the grinding wheel 32, 32a is then compared with a rotational speed of the cutting blade 30 determined by a transmitter 66.
  • the comparison device 64 is connected to a signal generating device 68 for generating a production enable signal when the rotational speed of the grinding wheel 32, 32a has reached a predeterminable percentage of the rotational speed of the cutting blade 30.
  • the production release signal is preferably delivered to a production release device 70 for releasing the production of the rod-shaped articles.
  • This production release device (70) can be part of the in FIG. 1 be shown Filteransetzmaschine.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Manufacturing Of Cigar And Cigarette Tobacco (AREA)
  • Grinding-Machine Dressing And Accessory Apparatuses (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Constituent Portions Of Griding Lathes, Driving, Sensing And Control (AREA)

Abstract

Device for grinding a rotating cutting blade comprises a measuring unit (46) for measuring the rotating speed of a grinding disk (32) and a signal-generating unit connected to the measuring unit for producing a production releasing signal when the rotating speed of the disk has reached a prescribed percentage of the theoretical rotating speed. Independent claims are also included for the following: (1) Method for grinding a rotating cutting blade; (2) Cigarette-making machine with the above device; and (3) Filter-placing machine with the above device. Preferred Features: The theoretical rotating speed is the theoretical rotating speed of the cutting blade.

Description

Die Erfindung betrifft eine Zigarettenherstellungs- und/oder Filteransetzmaschine mit einer Vorrichtung zum. Schleifen von rotierenden Schneidmessern zum Schneiden von stabförmigen Artikeln in der tabakverarbeitenden Industrie, mit mindestens einer rotierenden Schleifscheibe. Ferner betrifft die Erfindung ein Verfahren zum Schleifen von rotierenden Schneidmessern zum Schneiden von stabförmigen Artikeln in Zigarettenherstellungs- und/oder Filteransetzmaschinen der tabakverarbeitenden Industrie, bei welchem mindestens eine rotierende Schleifscheibe in berührenden Schleifeingriff mit dem Schneidmesser bringbar ist.The invention relates to a cigarette manufacturing and / or filter attachment machine with a device for. Grinding rotary cutting knives for cutting rod-shaped articles in the tobacco processing industry, comprising at least one rotating grinding wheel. Furthermore, the invention relates to a method of grinding rotary cutting knives for cutting rod-shaped articles in cigarette manufacturing and / or filter attachment machines of the tobacco processing industry, wherein at least one rotating grinding wheel can be brought into touching abrasive engagement with the cutting blade.

Zur Darstellung des technischen Hintergrunds seien Vorrichtungen und Verfahren beschrieben, die aus der DE 40 38 047 A1 bekannt sind. Dieses Dokument zeigt eine Vorrichtung zum Schleifen von Drehmessem mit fester Drehachse, die in Konfektioniermaschinen für Zigaretten arbeiten und weist ein Paar von zueinander koaxialen Schleifscheiben auf, die einen entsprechenden Abstand voneinander haben und zu der Ebene des zu schleifenden Drehmessers schräg angeordnet, um eine eigene Achse drehbar und gegenüber dem Drehmesser positionierbar sind. Die Schleifscheiben werden von einem Support gehalten, der entlang einer geraden Bahn parallel zu der Ebene des Drehmessers beweglich ist und durch als Stelleinrichtung dienende Antriebsmittel verschoben wird, die von automatischen und je nach dem Verschleiß oder der Reduzierung des Schleifgrades des Drehmessers programmierbaren Steuer- und Antriebsmitteln abhängen. Ferner weist die bekannte Schleifvorrichtung Abtastmittel auf, die in der Lage sind, den Zustand des vollständigen Verschleißes des Drehmessers anzugeben, der dem minimalen Durchmesser zur Benutzung des Drehmessers entspricht, um in diesem Fall das Anhalten der Antriebsmittel zu bewirken. Hierzu sprechen die Abtastmittel auf eine vorher festgelegte Endposition des Support an und dienen daher als ein Endschalter, der einen weiteren Vorschub des Support und somit der Schleifscheiben verhindert und dadurch gleichzeitig ein Signal für das Ende des Durchmessers des Drehmessers angibt. Die Steuer- und Antriebsmittel der bekannten Vorrichtung können außerdem nicht nur aufgrund des angenommenen Verschleißes oder der Reduzierung des Schleifgrades des Drehmessers, sondern nach dem erfassten Verschleiß des Drehmessers programmiert werden; hierzu könnten Abtastmittel vorgesehen werden, die die Veränderung der Winkelgeschwindigkeit der Schleifscheiben erfassen, welche auf einen teilweisen Verlust der Anhaftung an dem zu schleifenden Drehmesser zurückzuführen ist.To illustrate the technical background devices and methods are described, which from the DE 40 38 047 A1 are known. This document shows a device for grinding fixed-axis rotation measuring instruments which operate in cigar packing machines and comprises a pair of coaxial grinding wheels, each having a rotational axis have corresponding distance from each other and are arranged obliquely to the plane of the rotary blade to be ground, rotatable about its own axis and positioned relative to the rotary knife. The grinding wheels are supported by a support which is movable along a straight path parallel to the plane of the rotary knife and is displaced by drive means serving as an actuator which are controlled by automatic and programmable control and drive means according to wear or reduction of the degree of rotation of the rotary knife depend. Further, the known grinding apparatus has scanning means capable of indicating the state of complete wear of the rotary knife corresponding to the minimum diameter for use of the rotary knife to cause the drive means to stop in this case. For this purpose, the scanning means respond to a predetermined end position of the support and therefore serve as a limit switch, which prevents further advancement of the support and thus the grinding wheels and thereby simultaneously indicates a signal for the end of the diameter of the rotary knife. The control and drive means of the known device can also be programmed not only on the basis of the assumed wear or the reduction of the degree of rotation of the rotary knife, but after the detected wear of the rotary knife; For this purpose, scanning means could be provided, which detect the change in the angular velocity of the grinding wheels, which is due to a partial loss of adhesion to the grinding blade to be ground.

Die DE 33 24 262 C2 beschreibt eine Vorrichtung zum Anschärfen von rotierenden Schneidmessern, bei der das Anschärfen selbsttätig in Abhängigkeit von der Abnutzung erfolgen soll. Dabei soll die Abnutzung dadurch festgestellt werden, dass der Anpressdruck der Schleifscheibe indirekt durch das Erfassen der Drehzahl des Schneidmessers ermittelt wird, mit dem sich die Schleifscheibe in berührendem Schleifeingriff befindet.The DE 33 24 262 C2 describes a device for sharpening rotary cutting blades, in which the sharpening is to be done automatically depending on the wear. In this case, the wear is to be determined by the fact that the contact pressure of the grinding wheel is determined indirectly by detecting the rotational speed of the cutting blade, with which the grinding wheel is in touching loop engagement.

Die EP-B 1 213 105 der Anmelderin beschreibt eine Schneidvorrichtung und ein Verfahren zum Wechseln von Schneidmitteln, bei dem u. a. ein optisches Instrument, wie z.B. eine Laserdiode vorgesehen ist, das den Durchmesser bzw. den Rand des Messers ermittelt.The EP-B 1 213 105 The applicant describes a cutting device and a method for changing cutting means, in which inter alia, an optical instrument, such as a laser diode is provided, which determines the diameter or the edge of the knife.

Die DE-OS 102 05 146 der Anmelderin offenbart eine optische Abtasteinrichtung zur Ermittlung des Verschleißes am Schneidmesser.The DE-OS 102 05 146 The applicant discloses an optical scanning device for determining the wear on the cutting blade.

Es ist daher Aufgabe der vorliegenden Erfindung, Vorrichtungen und Verfahren der eingangs genannten Art zu verbessern, insbesondere so zu verbessern, dass zur bestimmungsgemäßen Weiterverarbeitung vorgesehene stabförmige Artikel einen höheren Qualitätsanforderungen genügenden sauberen Schnitt aufweisen.It is therefore an object of the present invention to improve devices and methods of the type mentioned, in particular to improve so that provided for the intended further processing rod-shaped article have a higher quality requirements sufficient clean cut.

Diese Aufgabe wird gemäß einem ersten Aspekt der vorliegenden Erfindung gelöst durch eine Vorrichtung nach Anspruch 1.This object is achieved according to a first aspect of the present invention by a device according to claim 1.

Ferner wird die vorgenannte Aufgabe gemäß einem zweiten Aspekt der vorliegenden Erfindung gelöst durch ein Verfahren nach Anspruch 9.Furthermore, the above object according to a second aspect of the present invention is achieved by a method according to claim 9.

Demnach wird mit Hilfe der Erfindung unter anderem erreicht, dass ein Produktionsfreigabesignal erst dann erzeugt wird, wenn die Schleifscheibe einen an die individuellen Verhältnisse der jeweiligen Vorrichtung anpassbaren und vorgebbaren Prozentsatz einer Sollrotationsgeschwindigkeit oder tatsächlichen Rotationsgeschwindigkeit des Schneidmessers erreicht hat. Denn die vorliegende Erfindung hat in diesem Zusammenhang erkannt, dass bei den eingangs genannten bekannten Vorrichtungen des Standes der Technik die Rotationsgeschwindigkeit der Schleifscheibe weder erfasst noch mit einer Sollrotationsgeschwindigkeit oder tatsächlichen Rotationsgeschwindigkeit des Schneidmessers verglichen wird. Im Stand der Technik erfolgt vielmehr eine Produktionsfreigabe zur Produktion der stabförmigen Artikel der tabakverarbeitenden Industrie völlig unabhängig von dem Verhältnis der Rotations- oder Umfangsgeschwindigkeiten von Schneidmesser und Schleifscheibe. Hier hat die Erfindung weiter erkannt, dass diese Unabhängigkeit der Produktionsfreigabe von dem vorgenannten Geschwindigkeitsverhältnis dazu führen kann, dass die Produktion der stabförmigen Artikel auch dann freigegeben ist oder wird, wenn die Rotationsgeschwindigkeiten von Schneidmesser und Schleifscheibe derart von einander abweichen, dass es zu einem unzureichenden Schleifen der Messer und somit zu einer unzureichenden Schärfe der Messer kommt, was wiederum einen unsauberen Schnitt und dementsprechend unsauber bzw. schlecht geschnittene stabförmige Artikel in der Produktion zur Folge hat. Diese mögliche Qualitätseinbuße bei den fertigen Produkten muss Dank der vorliegenden Erfindung nicht mehr hingenommen werden.Accordingly, with the aid of the invention it is achieved, inter alia, that a production release signal is only generated when the grinding wheel has reached a predefinable percentage of a desired rotational speed or actual rotational speed of the cutting blade that can be adapted to the individual conditions of the respective device. For the present invention has recognized in this context that in the aforementioned known devices of the prior art, the rotational speed of the grinding wheel neither detected nor compared with a desired rotational speed or actual rotational speed of the cutting blade. Rather, in the prior art, there is a production release for the production of the rod-shaped articles of tobacco-processing Industry completely independent of the ratio of the rotational or peripheral speeds of the cutting blade and grinding wheel. Here, the invention has further recognized that this independence of the production release of the aforementioned speed ratio can lead to the fact that the production of the rod-shaped article is also released or if the rotational speeds of the cutting blade and grinding wheel differ from each other so that it is insufficient Grinding the knives and thus resulting in insufficient sharpness of the knife, which in turn has an unclean cut and consequently unclean or poorly cut rod-shaped items in the production result. This possible loss of quality in the finished products must not be tolerated thanks to the present invention.

Vielmehr ist es aufgrund der vorliegenden Erfindung möglich, einen bestimmten Prozentsatz vorzugeben, den die Schleifscheibe mit ihrer Rotations- bzw. Umfangsgeschwindigkeit mindestens im Vergleich zu einer die gewünschten Qualitätsanforderungen sicherstellenden Sollrotationsgeschwindigkeit, bevorzugt zu einer Sollrotationsgeschwindigkeit des Schneidmessers, weiter bevorzugt zu einer tatsächlichen Rotationsgeschwindigkeit des Schneidmessers erreichen muss, bevor die Produktion durch das erfindungsgemäße Produktionsfreigabesignal freigegeben wird. Auf diese Weise wird sichergestellt, dass nur stabförmige Artikel in die Produktion gelangen, die mit einem Schneidmesser mit gewünschter Schärfe geschnitten worden sind. Es kommt daher Dank der vorliegenden Erfindung zu einer erheblichen Verbesserung der Qualität des Schnittes und somit der Qualität der entsprechenden stabförmigen Artikel.Rather, it is possible due to the present invention to specify a certain percentage, the grinding wheel with its rotational or peripheral speed at least compared to a desired quality requirements ensuring target rotational speed, preferably to a desired rotational speed of the cutting blade, more preferably to an actual rotational speed of the cutting blade must reach before the production is released by the production release signal according to the invention. In this way it is ensured that only rod-shaped articles which have been cut with a desired sharpness are put into production. It is therefore thanks to the present invention to a considerable improvement in the quality of the cut and thus the quality of the corresponding rod-shaped article.

Die Erfindung erweist sich insbesondere dann von großem Vorteil, wenn die Vorrichtung zum Schleifen beispielsweise aufgrund eines notwendig gewordenen Wechsels des Schneidmessers oder der Schleifscheibe gestoppt werden musste und nach dem erfolgten Wechsel wieder hochgefahren wird. Bei einem solchen Hochfahren der Vorrichtung, d.h. einem Hochfahren der Rotationsgeschwindigkeit des Schneidmessers und damit auch der anliegenden Schleifscheibe wird erst nach Erreichen des gewünschten Prozentsatzes die Produktionsfreigabe erteilt.The invention proves to be particularly advantageous if the device for grinding, for example, had to be stopped due to a change of the cutting blade or the grinding wheel that had become necessary and is raised again after the change has taken place. In such a startup of the device, ie a boot the rotational speed of the cutting blade and thus also the adjacent grinding wheel is granted production approval only after reaching the desired percentage.

Bevorzugte Ausführungen der Erfindung sind in den abhängigen Ansprüchen angegeben.Preferred embodiments of the invention are indicated in the dependent claims.

Zweckmäßigerweise ist die Signalerzeugungseinrichtung mit einer Produktionsfreigabeeinrichtung zum Freigeben der Produktion verbunden, so dass die Produktionsfreigabeeinrichtung, die beispielsweise in der zugeordneten Zigarettenherstellungs- bzw. Filteransetzmaschine vorgesehen ist, die Produktion freigeben kann, wenn sie von der Signalerzeugungseinrichtung das Produktionsfreigabesignal erhalten hat.The signal generating device is expediently connected to a production release device for releasing the production, so that the production release device, which is provided, for example, in the associated cigarette manufacturing or filter attachment machine, can release the production if it has received the production release signal from the signal generating device.

Bei einer gegenwärtig besonders bevorzugten Ausführung der Erfindung erfolgt die Erfassung der Rotationsgeschwindigkeit der Schleifscheibe dadurch, dass die Messeinrichtung einen an der Schleifscheibe vorgesehenen Taktgeber und einen zugeordneten, stationär angebrachten Sensor zum Erfassen des Taktgebers aufweist.In a presently particularly preferred embodiment of the invention, the detection of the rotational speed of the grinding wheel takes place in that the measuring device has a clock provided on the grinding wheel and an associated, stationary mounted sensor for detecting the clock.

Dabei ist es weiter bevorzugt, wenn die Schleifscheibe als Taktgeber mindestens einen Bereich mit gegenüber der übrigen Schleifscheibe abweichender Materialstärke aufweist. Dieser Bereich abweichender Materialstärke wird bevorzugt dadurch zur Verfügung gestellt, dass auf einer der Stirnseiten der gegebenenfalls als Doppelschleifscheibe ausgeführten Schleifscheibe eine Taktscheibe vorgesehen ist. Diese Taktscheibe besteht bevorzugt aus einem rechteckigen Blech, bevorzugt aus Edelstahl. Der zugeordnete Sensor zur Abfrage einer solchen Taktscheibe kann beispielsweise als Näherungsschalter, insbesondere als induktiver Sensor, ausgebildet sein und kann bevorzugt direkt an der Schleifscheibenaufnahme befestigt sein.It is further preferred if the grinding wheel has as clock at least one area with respect to the other grinding disc deviating material thickness. This range of deviating material thickness is preferably made available by providing a timing disk on one of the end faces of the grinding wheel, which may be designed as a double grinding wheel. This timing disk is preferably made of a rectangular plate, preferably made of stainless steel. The associated sensor for interrogating such a timing disk can be designed, for example, as a proximity switch, in particular as an inductive sensor, and can preferably be fastened directly to the grinding wheel receptacle.

Die Schleifscheibe weist normalerweise keinen eigenen Antrieb auf, sondern wird durch die Reibung mit dem Schneidmesser durch die Rotationsbewegung des Schneidmessers angetrieben. Es ist erfindungsgemäß jedoch auch möglich, die Schleifscheibe mit einem eigenen Antrieb zu versehen.The grinding wheel normally does not have its own drive, but is driven by the friction with the cutting blade by the rotational movement of the cutting blade. However, it is also possible according to the invention to provide the grinding wheel with its own drive.

Nachfolgend wird ein bevorzugtes Ausführungsbeispiel der Erfindung anhand der beiliegenden Zeichnungen näher erläutert. Es zeigen:

Figur 1
eine schematische Ansicht einer Filteransetzmaschine;
Figur 2
in vergrößerter schematischer Darstellung eine in der Maschine von Figur 1 verwendete Anordnung, bestehend aus einer Schneidtrommel, einem Kreismesser und einer Schleifvorrich- tung;
Figur 3
eine schematische perspektivische Ansicht einer Ausführungs- form einer erfindungsgemäßen Schleifscheibe;
Figur 4
eine zweite schematische perspektivische Ansicht der Ausfüh- rungsform der Schleifscheibe der Figur 3 in einer Halterung gemäß Figur 5; und
Figur 5
eine schematische perspektivische Ansicht einer Haltevorrich- tung zum Halten einer Schleifscheibe und eines zugeordneten Sensors.
Hereinafter, a preferred embodiment of the invention will be explained in more detail with reference to the accompanying drawings. Show it:
FIG. 1
a schematic view of a Filteransetzmaschine;
FIG. 2
in an enlarged schematic representation in the machine of FIG. 1 used assembly consisting of a cutting drum, a circular knife and a grinding device;
FIG. 3
a schematic perspective view of an embodiment of a grinding wheel according to the invention;
FIG. 4
a second schematic perspective view of the embodiment of the grinding wheel of FIG. 3 in a holder according to FIG. 5 ; and
FIG. 5
a schematic perspective view of a holding device for holding a grinding wheel and an associated sensor.

In Figur 1 ist schematisch eine Vorderansicht einer Filteransetzmaschine vom Typ "MAX" der Anmelderin dargestellt, deren Einzelheiten nachfolgend erläutert werden.In FIG. 1 schematically a front view of a filter attachment machine of the type "MAX" of the applicant is shown, the details of which are explained below.

Eine Einlauftrommel 1 übergibt die auf einer Zigarettenherstellmaschine produzierten, in Figur nicht im einzelnen dargestellten Zigaretten an zwei Staffeltrommeln 2, welche die gestaffelt zugeführten Zigaretten entstaffeln und in Reihen zu je zwei Stück mit einem Zwischenraum zwischen den Zigaretten an eine Zusammenstelltrommel 3 abgeben. Im einzelnen nicht dargestellte Filterstäbe gelangen aus einem Magazin 4 auf eine Schneidtrommel 6, werden dort zu Filterstopfen doppelter Gebrauchslänge geschnitten, auf einer Staffeltrommel 7 gestaffelt, von einer Schiebetrommel 8 zu einer Reihe hintereinanderliegender Stopfen ausgerichtet und von einer Beschleunigertrommel 9 in die Zwischenräume der Zigarettenreihen auf der Zusammenstelltrommel 3 abgelegt. Die so zueinander ausgerichteten Zigarette-Filter-Zigarette-Gruppen werden zusammengeschoben und von einer Übergabetrommel 11 übernommen. Ein von einer Belagpapierbobine 13 abgezogener Belagpapierstreifen 12 wird von einer Beleimvorrichtung 14 beleimt und dann in einer Schneidvorrichtung 16 auf einer Schneidtrommel 17 von den Messern einer Messertrommel 18 in im einzelnen nicht dargestellte Belagblättchen zerschnitten. Die abgetrennten Belagblättchen werden an die Zigarette-Filter-Zigarette-Gruppen auf der Übergabetrommel 11 angeheftet und auf einer Rolltrommel 19 um die Zigarettenfiltergruppen herumgerollt. Die fertigen Doppelfilterzigaretten werden über eine Trockentrommel 21 einer Schneidtrommel 22 zugeführt und auf dieser durch mittiges Schneiden durch die Filterstopfen hindurch zu im einzelnen nicht dargestellten Einzelfilterzigaretten konfektioniert. Eine Wendeeinrichtung 23 wendet eine Filterzigarettenreihe und überführt sie gleichzeitig in eine durchlaufende ungewendete Filterzigarettenreihe. Über eine Prüftrommel 24 gelangen die Filterzigaretten zu einer Auswerftrommel 26. Eine mit einer Bremstrommel 27 zusammenwirkende Ablegertrommel 28 legt die im einzelnen nicht dargestellten Filterzigaretten auf ein Ablegerband 29.An inlet drum 1 transfers the cigarettes produced on a cigarette manufacturing machine, not shown in detail in FIG. 2, to two Squatter drums 2, which graduate the staggered cigarettes and deliver in rows of two each with a space between the cigarettes to a compilation drum 3. Not shown in detail filter rods arrive from a magazine 4 on a cutting drum 6, cut there to filter plug twice the length of use, staggered on a staggering drum 7, aligned by a sliding drum 8 to a series of consecutive plugs and an accelerator drum 9 in the spaces between the cigarette rows the compilation drum 3 stored. The thus aligned cigarette filter cigarette groups are pushed together and taken over by a transfer drum 11. A covering paper strip 12 drawn off from a tipping paper bobbin 13 is glued by a gluing device 14 and then cut in a cutting device 16 on a cutting drum 17 by the knives of a knife drum 18 into covering tufts not shown in detail. The separated pad sheets are adhered to the cigarette filter-cigarette groups on the transfer drum 11 and rolled on a roller drum 19 around the cigarette filter groups. The finished double-filter cigarettes are fed via a drying drum 21 to a cutting drum 22 and assembled thereon by means of central cutting through the filter plugs to individual filter cigarettes not shown in detail. A turning device 23 applies a series of filter cigarettes and transfers them simultaneously into a continuous unswept filter cigarette line. About a test drum 24, the filter cigarettes reach an ejector drum 26. A cooperating with a brake drum 27 Ablegertrommel 28 sets the filter cigarettes not shown in detail on a Ablegerband 29th

Wie Figur 1 ferner erkennen lässt, sind im dargestellten Ausführungsbeispiel den Schneidtrommeln 6 und 22 Kreismesser 30 zugeordnet, und zwar der Schneidtrommel 6 zwei Kreismesser 30 und der Schneidtrommel 22 ein Kreismesser 30. Die den Umfangsrand der Kreismesser 30 bildenden Schneiden verlieren während der Dauer ihres Betriebes ihre Schärfe. Ein solcher Verschleiß der Kreismesser 30 wirkt sich jedoch nachteilig auf die Herstellung der Zigaretten aus, da in einem solchen Fall der gewünschte saubere Schnitt nicht mehr gewährleistet werden kann. Um dies zu verhindern, sind den Kreismessern Schleifscheiben zugeordnet, mit denen die Kreismesser regelmäßig nachgeschliffen werden. In Figur 1 ist beispielhaft eine Schleifscheibe 32 dargestellt, die benachbart zu dem der Schneidtrommel 22 zugeordneten Kreismesser 30 positioniert ist. Gewöhnlich sind zwei parallel zueinander angeordnete Schleifscheiben vorgesehen, die gegenüber dem Kreismesser 30 ein wenig verdreht angestellt sind. Zugestellt zum Kreismesser 30 werden die Schleifscheiben 32 mit Hilfe eines Stellantriebes 34. Eine solche aus Schleifscheiben und Stellbetrieb bestehende Schleifvorrichtung ist auch für die der Schneidtrommel 6 zugeordneten Kreismesser 30 vorgesehen, jedoch aus Gründen der Übersichtlichkeit in Figur 1 im Einzelnen nicht dargestellt.As FIG. 1 Furthermore, in the illustrated embodiment, the cutting drums 6 and 22 are associated with circular blades 30, namely the cutting drum 6 two circular blades 30 and the cutting drum 22 a circular blade 30. The cutting edges forming the peripheral edge of the circular blades 30 lose their sharpness during their operation. Such wear of the circular blade 30, however, adversely affects the Manufacture of cigarettes, since in such a case, the desired clean cut can not be guaranteed. To prevent this, the circular knives are assigned grinding wheels with which the circular knives are reground regularly. In FIG. 1 For example, a grinding wheel 32 is shown positioned adjacent to the circular blade 30 associated with the cutting drum 22. Usually two parallel grinding wheels are provided, which are employed with respect to the circular blade 30 a little twisted. Delivered to the circular blade 30, the grinding wheels 32 by means of an actuator 34. Such consisting of grinding wheels and actuator grinding device is also provided for the cutting drum 6 associated circular blade 30, but for reasons of clarity in FIG. 1 not shown in detail.

In Figur 2 ist in vergrößerter schematischer Darstellung eine Anordnung aus Schneidtrommel 22, Kreismesser 30, Schleifscheiben 32 und Stellantrieb 34 gezeigt, wobei auch hier von den beiden Schleifscheiben nur eine Schleifscheibe 32 erkennbar ist. Ebenfalls sind in Figur 2 entlang des Umfanges der Schneidtrommel 22 axial angeordnete Doppelfilterzigaretten C erkennbar, welche vom Kreismesser 30 durchgeschnitten werden, indem der Schnitt, wie bereits zuvor erwähnt wurde, mittig durch die im Einzelnen nicht dargestellten Filter hindurch stattfindet.In FIG. 2 an arrangement of cutting drum 22, circular blade 30, grinding wheels 32 and actuator 34 is shown in an enlarged schematic representation, in which case only one grinding wheel 32 can be seen from the two grinding wheels. Also are in FIG. 2 along the circumference of the cutting drum 22 axially arranged double filter cigarette C recognizable, which are cut by the circular blade 30 by the cut, as already mentioned above, takes place centrally through the filter, not shown in detail.

Die Schneide des Kreismessers 30 wird mit einem optischen Sensor 36 online überwacht, der ein elektrisches Ausgangssignal an eine Steuereinrichtung 38 übermittelt, die den Stellantrieb 34 ansteuert. Meldet der optische Sensor 36 eine ausreichende Schärfe, wird das Kreismesser 30 nicht geschliffen, d.h. die Steuereinrichtung 38 steuert den Stellantrieb 34 so an, dass die Schleifscheiben 32 außer Eingriff vom Kreismesser 30 bleiben. Erst wenn der optische Sensor 36 eine Abstumpfung registriert, steuert die Steuereinrichtung 38 den Stellantrieb 34 so an, dass diese die Schleifscheiben 32 in Richtung auf das Kreismesser 30 bewegen, bis sie in berührenden Schleifeingriff mit der Schneide des Kreismessers 30 gelangen. Auf diese Weise wird das Kreismesser 30 nachgeschliffen, allerdings jedoch nur so lange, bis die erforderliche Schärfe wieder erreicht wird. Wenn nämlich während des Schleifbetriebes der optische Sensor 36 feststellt, dass die Schneide des Kreismessers 30 wieder die gewünschte Schärfe erlangt hat, steuert die Steuereinrichtung 38 den Stellantrieb 34 so an, dass die Schleifscheiben 32 wieder außer Eingriff vom Kreismesser 30 gebracht werden, und deaktiviert gegebenenfalls dann den Stellantrieb 34.The cutting edge of the circular knife 30 is monitored online with an optical sensor 36, which transmits an electrical output signal to a control device 38, which controls the actuator 34. If the optical sensor 36 indicates sufficient sharpness, the circular blade 30 is not ground, ie the control device 38 controls the actuator 34 in such a way that the grinding wheels 32 remain disengaged from the circular blade 30. Only when the optical sensor 36 registers a blunt, the controller 38 controls the actuator 34 so that they move the grinding wheels 32 in the direction of the circular blade 30 until they come into touching loop engagement with the cutting edge of the circular blade 30. On in this way, the circular blade 30 is reground, but only until the required sharpness is reached again. Namely, during the grinding operation, when the optical sensor 36 detects that the blade of the circular blade 30 has regained the desired sharpness, the controller 38 controls the actuator 34 so that the grinding wheels 32 are again disengaged from the circular blade 30, and deactivates if necessary then the actuator 34th

Die in Figur 2 dargestellte Anordnung aus Schleifscheiben 32, Stellantrieb 34, optischem Sensor 36 und Steuereinrichtung 38 bildet demnach einen geschlossenen Regelkreis, der nicht für einen kontinuierlichen Schleifscheibenvorschub, sondern nur bei Bedarf für einen Schleifscheibenvorschub durch den Stellantrieb 34 sorgt. Demnach werden die Schleifscheiben 32 erst nach Erkennen einer Abstumpfung des Kreismessers 30 mit Hilfe des optischen Sensors 36 zugestellt und findet ein Nachschleifen des Kreismessers 30 nur bei Bedarf statt. Auf diese Weise ist es möglich, eine maximale Standzeit des Kreismessers 30 zu erzielen. Eine Anpassung an das gefahrene Material erfolgt dabei automatisch.In the FIG. 2 shown arrangement of grinding wheels 32, actuator 34, optical sensor 36 and control device 38 thus forms a closed loop, which provides not for a continuous grinding wheel feed, but only when needed for a grinding wheel feed by the actuator 34. Accordingly, the grinding wheels 32 are delivered only after detecting a dulling of the circular blade 30 by means of the optical sensor 36 and a regrinding of the circular blade 30 takes place only when needed. In this way it is possible to achieve a maximum service life of the circular blade 30. An adaptation to the driven material takes place automatically.

Wie bereits zuvor angedeutet wurde, ist in der in Figur 1 dargestellten Maschine eine Schleifvorrichtung mit einer Anordnung ähnlich der von Figur 2 auch für die der Schneidtrommel 6 zugeordneten Kreismesser 30 vorzusehen.As indicated earlier, in the FIG. 1 illustrated machine, a grinding device with an arrangement similar to that of FIG. 2 also provide for the cutting drum 6 associated circular blade 30.

Figur 3 zeigt eine Ausführungsform einer erfindungsgemäßen Schleifscheibe 32. Die Schleifscheibe 32 weist eine zentrale Bohrung 39 auf, in die eine in der Figur 5 dargestellte Welle 40 zum Halten der Schleifscheibe 32 einsteckbar ist. In einem Bereich 44 zwischen der Bohrung 39 und einem Rand 41 ist als Bereich erhöhter Materialstärke ein als Edelstahlblech ausgebildeter Taktgeber 45 vorgesehen. Der Taktgeber 45 ist einstückig ausgebildet und weist in seiner Mitte ein Loch zur Befestigung an der Schleifscheibe 32 bzw. zum Aufstecken auf die weiter unten in Bezug auf Figur 5 beschriebene Welle 40 der Haltevorrichtung 48 zum Halten der Schleifscheibe 32 auf. Der Taktgeber 45 weist für seine Funktion als Taktgeber insbesondere zwei in Richtung des Randes 41 der Schleifscheibe 32 weisende Bereiche 46 und 46a auf, die von einem weiter unten mit Bezug auf die Figur 5 beschriebenen Sensor 60 erfassbar sind. FIG. 3 shows an embodiment of a grinding wheel according to the invention 32. The grinding wheel 32 has a central bore 39, in which a in the FIG. 5 shown shaft 40 for holding the grinding wheel 32 can be inserted. In a region 44 between the bore 39 and a rim 41, a timer 45 designed as a stainless steel sheet is provided as a region of increased material thickness. The clock 45 is integrally formed and has in its center a hole for attachment to the grinding wheel 32 and for mounting on the below with respect to FIG. 5 described shaft 40 of the holding device 48 for holding the Grinding wheel 32 on. The clock 45 has for its function as a clock in particular two pointing in the direction of the edge 41 of the grinding wheel 32 areas 46 and 46 a, which from a further below with respect to the FIG. 5 described sensor 60 can be detected.

Figur 4 zeigt die Ausführungsform der Figur 3 in einer weiteren schematischen und perspektivischen Ansicht in einer Haltevorrichtung gemäß Figur 5. Die Haltevorrichtung wird weiter unten mit Bezug auf Figur 5 noch genauer beschrieben. Figur 4 zeigt jedoch bereits, dass ein zur Erfassung des Taktgebers 45 dienender Sensor 60 derart benachbart zu der Schleifscheibe 32, die gemäß Figur 4 als Doppelschleifscheibe ausgebildet ist, angeordnet ist, dass der Sensor 60 bei Rotation der Schleifscheibe 32 ein Vorbeistreichen des in Figur 4 sichtbaren Bereiches 46 des Taktgebers 45 erfasst und auch bei weiterer Rotation ein Vorbeistreichen des Bereiches 46a des Taktgebers 45 in seiner Funktion als Näherungsschalter erfassen kann. Die derart von dem Sensor 60 abgegebenen Taktsignale können beispielsweise mit einer Auflösung von 200 ns aufgelöst werden, so dass auf diese Weise die Zeit pro Umdrehung der Schleifscheibe 32 sehr genau gemessen werden kann und hieraus sehr schnell und sehr genau die Drehzahl bzw. die Rotationsgeschwindigkeit der Schleifscheibe 32 bestimmt werden kann. FIG. 4 shows the embodiment of the FIG. 3 in a further schematic and perspective view in a holding device according to FIG. 5 , The holding device will be described below with reference to FIG FIG. 5 described in more detail. FIG. 4 however, already shows that a sensor 60 serving to detect the timer 45 is adjacent to the grinding wheel 32 in accordance with FIG FIG. 4 is designed as a double grinding wheel, it is arranged that the sensor 60 upon rotation of the grinding wheel 32 a Vorbeistreichen of in FIG. 4 detected visible range 46 of the clock 45 and also on further rotation can detect a past range of the range 46a of the clock 45 in its function as a proximity switch. The thus emitted by the sensor 60 clock signals can be resolved, for example, with a resolution of 200 ns, so that in this way the time per revolution of the grinding wheel 32 can be measured very accurately and from this very quickly and very accurately the speed or the rotational speed of the Grinding wheel 32 can be determined.

Figur 5 zeigt eine Haltevorrichtung 48 zum Halten einer Schleifscheibe 32 bzw. 32a auf einer an einer L-förmigen Halterung 50 angebrachten Welle 40. Die Halterung 50 ist ihrerseits wiederum über eine Welle 52 drehbar mit dem Gehäuse 54 einer Zigarettenherstellungs- oder eine Filteransetzmaschine, bspw. einer Filteransetzmaschine gemäß Fig. 1, verbunden. An der Halterung 50 ist ein Halteblech 56 angebracht, welches eine Bohrung aufweist, in der mit Hilfe einer Mutter 58 ein induktiver Sensor 60 als Näherungsschalter festgesetzt ist. FIG. 5 shows a holding device 48 for holding a grinding wheel 32 or 32 on a mounted on an L-shaped bracket 50 shaft 40. The bracket 50 is in turn via a shaft 52 rotatably connected to the housing 54 of a Zigarettenherstellungs- or a Filteransetzmaschine, for example Filter attachment machine according to Fig. 1 , connected. On the holder 50, a holding plate 56 is attached, which has a bore in which by means of a nut 58, an inductive sensor 60 is set as a proximity switch.

Der Sensor 60 erfasst bei um die Achse 40 rotierender Schleifscheibe 32, 32a die durch die Taktscheibe 45 zur Verfügung gestellten Bereiche erhöhter Materialstärke 46 bzw. 46a der Schleifscheiben 32, 32a und gibt entsprechende Signale über eine Leitung 61 an eine Messeinrichtung 62 zum Ermitteln der Rotationsgeschwindigkeit der Schleifscheibe 32, 32a aus den Signalen des Sensors 60 ab. Mit einer mit der Messeinrichtung 62 verbundenen Vergleichseinrichtung 64 wird dann die ermittelte Rotationsgeschwindigkeit der Schleifscheibe 32, 32a mit einer von einem Messwertgeber 66 ermittelten Rotationsgeschwindigkeit des Schneidmessers 30 verglichen. Mit der Vergleichseinrichtung 64 ist eine Signalerzeugungseinrichtung 68 zum Erzeugen eines Produktionsfreigabesignals verbunden, wenn die Rotationsgeschwindigkeit der Schleifscheibe 32, 32a einen vorgebbaren Prozentsatz der Rotationsgeschwindigkeit des Schneidmessers 30 erreicht hat. Das Produktionsfreigabesignal wird bevorzugt an eine Produktionsfreigabeeinrichtung 70 zum Freigeben der Produktion der stabförmigen Artikel abgegeben. Diese Produktionsfreigabeeinrichtung (70) kann Teil der in Figur 1 dargestellten Filteransetzmaschine sein.When the grinding wheel 32, 32a rotates about the axis 40, the sensor 60 detects the areas provided by the timing disk 45 higher Material thickness 46 and 46a of the grinding wheels 32, 32a and outputs corresponding signals via a line 61 to a measuring device 62 for determining the rotational speed of the grinding wheel 32, 32a from the signals of the sensor 60 from. With a comparison device 64 connected to the measuring device 62, the determined rotational speed of the grinding wheel 32, 32a is then compared with a rotational speed of the cutting blade 30 determined by a transmitter 66. The comparison device 64 is connected to a signal generating device 68 for generating a production enable signal when the rotational speed of the grinding wheel 32, 32a has reached a predeterminable percentage of the rotational speed of the cutting blade 30. The production release signal is preferably delivered to a production release device 70 for releasing the production of the rod-shaped articles. This production release device (70) can be part of the in FIG. 1 be shown Filteransetzmaschine.

Claims (10)

  1. Cigarette manufacturing and/or filter application machine with a device for grinding a rotating cutting blade (30) for cutting rod-shaped articles in the tobacco-processing industry, with:
    at least one rotating grinding wheel (32, 32a),
    characterised by a measuring means (46, 46a, 60) for determining the speed of rotation of the grinding wheel (32, 32a) and
    a signal generation means (68) connected to the measuring means (46, 46a, 60) for generating a production release signal when the speed of rotation of the grinding wheel (32, 32a) has reached a presettable percentage of a target speed of rotation or actual speed of rotation of the cutting blade (30).
  2. Machine according to claim 1,
    characterised in that the target speed of rotation is a target speed of rotation of the cutting blade (30).
  3. Machine according to one of claims 1 or 2, characterised in that a sensor (66) for indicating the speed of rotation of the cutting blade (30) is provided, wherein the sensor (66) and the measuring means (46, 46a, 60) for determining the speed of rotation of the grinding wheel are connected to a reference means (64) for comparing the speed of rotation of the cutting blade with the speed of rotation of the grinding wheel and wherein a signal generation means (68) which generates a production release signal when the speed of rotation of the grinding wheel (32, 32a) has reached a presettable percentage of the speed of rotation of the cutting blade (30), is connected to the reference means (64).
  4. Machine according to one of claims 1 to 3, with a production release means (70), connected to the signal generation means (68), to release production when the production release means (70) receives the production release signal from the signal generation means (68).
  5. Machine according to one of claims 1 to 4, wherein the measuring means (46, 46a, 60) has a clock generator (46, 46a) provided on the grinding wheel (32, 32a) and an associated sensor (60), preferably arranged in a stationary manner, recording the clock generator (46, 46a).
  6. Machine according to one of claims 1 to 5, wherein the grinding wheel (32, 32a) as clock generator has at least one area (46, 46a) with a different material thickness compared to a material thickness of the other grinding wheel.
  7. Machine according to one of claims 5 or 6, characterised in that the sensor (60) is an inductive sensor (60).
  8. Machine according to one of the preceding claims, characterised in that the grinding wheel (32, 32a) does not have its own drive.
  9. Method for grinding a rotating cutting blade (30) for cutting rod-shaped articles in cigarette manufacturing and/or filter application machines in the tobacco-processing industry, in which at least one rotating grinding wheel (32, 32a) can be brought into contacting grinding engagement with the cutting blade (30),
    characterised by the steps:
    determination of the speed of rotation of the grinding wheel (32, 32a) and
    generation of a production release signal when the speed of rotation of the grinding wheel (32, 32a) has reached a presettable percentage of a target speed of rotation or actual speed of rotation of the cutting blade (30).
  10. Method according to claim 9,
    with the steps:
    recording of the speed of rotation of the cutting blade (30),
    comparison of the speed of rotation of the cutting blade (30) with the speed of rotation of the grinding wheel (32, 32a), and
    generation of a production release signal when the speed of rotation of the grinding wheel (32, 32a) has reached a presettable percentage of the speed of rotation of the cutting blade (30).
EP08014676A 2007-08-31 2008-08-19 Method and device for grinding cutting blades Not-in-force EP2030515B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL08014676T PL2030515T3 (en) 2007-08-31 2008-08-19 Method and device for grinding cutting blades

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102007041470A DE102007041470A1 (en) 2007-08-31 2007-08-31 Apparatus and method for grinding cutting blades

Publications (3)

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EP2030515A2 EP2030515A2 (en) 2009-03-04
EP2030515A3 EP2030515A3 (en) 2010-01-20
EP2030515B1 true EP2030515B1 (en) 2011-11-16

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JP (1) JP2009056591A (en)
CN (1) CN101376224B (en)
AT (1) ATE533366T1 (en)
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CN103371434B (en) * 2012-04-26 2015-02-11 龙岩烟草工业有限责任公司 Mounting device for knife grinding wheel of cigarette making machine
DE102014215232B3 (en) * 2014-08-01 2015-07-23 Hauni Maschinenbau Ag Cutting device for cutting rod-shaped or strand-shaped products of the tobacco-processing industry
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IT201900024220A1 (en) * 2019-12-17 2021-06-17 Gd Spa Tobacco industry cutting device

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1156629B (en) 1982-07-14 1987-02-04 Gd Spa SHARPENING DEVICE FOR ROTATING BLADES
IT1236173B (en) * 1989-12-01 1993-01-11 Gd Spa DEVICE FOR THE SHARPENING OF ROTATING BLADES.
DE10021614A1 (en) * 2000-05-04 2001-11-08 Hauni Maschinenbau Ag Method and device for automatic regrinding of tobacco cutting knives
DE10035743A1 (en) * 2000-07-22 2002-04-04 Deere & Co grinder
DE10060552A1 (en) 2000-12-06 2002-06-13 Hauni Maschinenbau Ag Cutting device and method for changing cutting means
DE10205146A1 (en) 2002-02-07 2003-08-21 Hauni Maschinenbau Ag Sharpening of rotating cutting knife for use in cigarette production, involves scanning knife blade to measure amount of blade wear so that sharpening is only carried out as necessary

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CN101376224B (en) 2013-07-31
DE102007041470A1 (en) 2009-03-05
ATE533366T1 (en) 2011-12-15
PL2030515T3 (en) 2012-04-30
EP2030515A3 (en) 2010-01-20
JP2009056591A (en) 2009-03-19
EP2030515A2 (en) 2009-03-04
CN101376224A (en) 2009-03-04

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