EP3501744A1 - Tool for fitting/removing a chisel to/from a chisel holder system of a milling machine - Google Patents

Abstract

The invention relates to a tool for mounting a chisel and / or the disassembly of a chisel from a chisel holder system of a milling machine, in particular a road milling machine, with at least one trigger with which an assembly and / or disassembly of a chisel is triggered. It is provided that the tool has a detection device with at least one counter and that the detection device is adapted to detect a number of removed with the tool bits and / or a number of tools mounted with the chisels. The invention also relates to corresponding chisel holder system as well as a method for wear monitoring. The tool and the chisel holder system provide a user with additional information about performed chisel changes.

Description

The invention relates to a tool for mounting a chisel and / or the disassembly of a chisel from a chisel holder system of a milling machine, in particular a road milling machine, with at least one trigger with which an assembly and / or disassembly of a chisel is triggered.

The invention also relates to a bit holder system for a milling machine, in particular a road milling machine, with at least one bit holder for releasably securing at least one bit to a milling drum of the milling machine.

The invention also relates to a method for monitoring the wear of chisels and / or exchangeable chisel holders on chisel holder systems of a milling drum of a milling machine, in particular a road milling machine, wherein the chisels are removed by means of a tool from the chisel holder systems for exchanging the chisel and / or the chisel with Help of the Tool are mounted on the chisel holder systems and wherein the wear behavior of the chisel and / or the exchangeable chisel holder on the basis of the number of exchanged chisel and / or the number of exchanged exchangeable chisel holder is determined.

For the removal of soil material, for example, for renewal of roads or in open pit mining, tillage machines are used, which mill the ground. The tillage machines each have a rotating milling drum, on the surface of which chisels are arranged. The bits are exchangeably connected as wear parts with a Fräswalzenrohr the milling drum. For this purpose, it is known to attach to the Fräswalzenrohr chisel holder systems, of which the bits are releasably held. The chisel holder systems each have a chisel holder for receiving the chisels. These can be directly connected to the Fräswalzenrohr, for example welded thereto. It is also known to attach a base holder to the roller tube and to keep the bit holder releasably thereto. In such a chisel holder system having a base holder and a chisel holder, a worn chisel from the chisel holder and a worn chisel holder may be removed from the base holder and replaced.

For the removal of the chisel from the chisel holders separate tools are known. Such a tool is in the DE 10 2008 025 071 A1 described. An actuator of the tool, which carries at its free end a Austreibdorn is adjustably held on a base part of the tool. The actuator is directly or indirectly coupled to a cylinder-piston system or to an electromotive unit. This / this presses after actuation of a trigger, the front end of the Austreibdorns against a support surface, which forms the end-side conclusion of a held in the bit holder of the bit holder chisel shank. The bit may be formed as a round shank chisel, wherein the chisel shaft by means of a clamping sleeve about its longitudinal axis rotatable but axially blocked, is held in the bit holder. The chisel is pressed out of the chisel holder by the pressure of the expelling mandrel on the end of the chisel shank. The tool is to do so with its base part on the Chisel holder or counter-mounted on a arranged between a chisel head and a neck of the chisel holder wear protection.

The DE 10 2007 030 640 B3 discloses a tool for mounting and dismounting a bit on a bit holder. The tool has an actuator which can be adjusted in two opposite directions by means of an actuating unit, which is bidirectionally power-operated. The actuator is a Abdrückabschnitt and associated with a distance to this Einziehabschnitt. The actuating unit can be inserted in a recess on a base part of a chisel holder system, of which a chisel holder is held. It is also possible that the base part and the bit holder are summarized as a unit in one piece. The actuator is in Ausschubrichtung with the Abdrückabschnitt on a cylindrical support member, which forms the end facing away from the bit head of a chisel shank of a round shank chisel on. The Einziehabschnitt includes the cylindrical support member and engages in a groove formed between the cylindrical support member and the drill collar. Thus, a force in the direction of ejection can be transmitted to the bit by means of the push-off section, while a force in the direction of feed of the bit can be introduced by the engagement of the pull-in section into the groove. The actuator is hydraulically operated. For this purpose, it is connected to a battery-powered hydraulic unit. By appropriate control, the adjusting unit and the associated actuator can be adjusted and thus ejected a chisel or fed into the bit holder of the chisel holder.

From the Scriptures US 2015/0300165 A1 a milling drum is known, the releasably mounted milling tools (chisels) are each equipped with a transponder (RFID). The transponders contain data that enables unambiguous identification of the respective milling tools. The milling machine is assigned a reading device which reads out the information stored in the transponder and forwards it to a computer. This compares the received data stored in a memory. In the case of a deviation of the data, a loss of a respective milling tool is assumed. A milling machine can determine the number of milling tools available at any time.

The US 2017/0011564 A1 describes a monitoring system for chisels of a milling drum. Each chisel is associated with at least one transmitter, for example in the form of an RFID transmitter. The transmitter is in radio communication with a receiver arranged on the milling machine and via this with an evaluation system. In the absence of a signal from a transmitter, the evaluation system detects the loss or inadmissible wear of a chisel. For wear detection, the at least one transmitter is arranged within the bit or the chisel head. With advanced wear of the bit, the transmitter is exposed and destroyed.

From the DE 10 2016 113 251 A1 are known a milling machine, a milling drum for such a milling machine and a method for operating the milling machine. The milling machine is assigned a means for determining a characteristic feature of the milling drum. On the basis of this characteristic feature, a value to be set and / or a setting range for at least one machine parameter of the milling machine are specified. On the basis of the characteristic feature, for example, the type of milling drum and thus the milling task can be determined. A characteristic feature can be given for example by an identification of the milling drum. Such an identifier may be stored in an active or passive transponder. The marking or the transponder can be arranged in or on a milling drum tube, a tool holder or a milling tool.

It is an object of the invention to provide a tool for the assembly and / or disassembly of a bit on a bit holder system of a milling drum, which provides a user with improved information for determining wear.

It is a further object of the invention to provide a corresponding bit holder system.

It is also an object of the invention to provide a method by which the wear behavior of chisels and bit holders of a milling machine can be determined simply and safely.

The tool-related object of the invention is achieved in that the tool has a detection device with at least one counting device and that the detection device is designed to detect a number of bits removed with the tool and / or a number of bits mounted with the tool , The machine operator and / or the maintenance personnel of the milling machine thus know immediately how many chisels have been changed on a milling drum. Errors in determining the number of exchanged bits, as they can occur in the simple counting by the maintenance staff, are thus safely avoided. On the basis of the number of removed and / or mounted chisels, the operator can draw conclusions about the wear behavior of the chisel in the milling task performed. This makes it possible to forecast the future wear behavior on continuation of the milling task. From this forecast, for example, the need for chisels until the completion of the milling task or a suitable duration for the maintenance intervals can be derived. The exchanged chisel numbers can be used to manage the spare parts warehouse and the chisels delivered to a construction site and kept at the construction site. On the basis of the required chisel changes conclusions can be drawn on the material properties of the milled substrate. Then, for example, the machine parameters can be adjusted so that the largest possible milling performance is achieved with the least possible wear. By this measure, a cost-effective operation of the milling machine is made possible. Taking into account the number of chisels replaced, the efficiency of the machine's use and the cost of using the machine can be determined for a completed milling job. Advantageously, the detection device is arranged on the tool with which the chisels are installed or removed. This is advantageous over known detection devices arranged on the milling machine in the immediate vicinity of the milling drum, since the detection device does not meet the high mechanical loads exposed during the milling process. The bits are held by bit holder systems, which are mounted on a Fräswalzenrohr the milling machine. For this purpose, a respective chisel holder system has a corresponding chisel holder which, for example, comprises a chisel holder for receiving and detachably fixing a chisel shank. The tool is designed to introduce the chisel with its bit shank in the bit holder of the chisel holder and / or drive out of this. The bit holder may be fixed directly to the Fräswalzenrohr. He then forms the chisel holder system. It can also be provided that a replaceable bit holder is detachably held by a base support, wherein the base support is firmly, for example via a welded joint, connected to the Fräswalzenrohr. The bit holder system is then formed by the exchangeable bit holder and the base carrier.

A simple and reliable detection of the installed and / or removed chisels can take place in that the detection device is designed to, upon actuation of the at least one trigger a count of the counter for the number of disassembled chisels or for the number of mounted chisels by one increase. The operation of the trigger is a clear signal, which is easy to grasp and can be clearly assigned to a built-in and / or removed chisel.

In accordance with a preferred embodiment variant of the invention, it can be provided that the detection device is designed to read at least one identifier arranged on the bit holder system on which the tool is attached, and / or that the detection device is designed to actuate the at least one trigger, upon actuation of the at least one trigger, at least one identifier which is arranged on the chisel held by the chisel holder system, on which the tool is attached, to read out. The identifier allows a unique identification of a respective chisel holder system or a chisel. The identifier may include other data, such as a bit type, a chisel or chisel holder material number, and / or a mounting date of the bit or chisel holder system.

As an alternative to increasing the counter when the trigger is actuated, the counter can also be incremented when an identifier is detected. These alternatives should also apply to all subsequent embodiments.

According to a possible variant of the invention, provision can be made for the detection device to be designed to read out a data carrier, in particular an electronic data carrier, arranged as identifier on the bit holder system. An electronic data carrier allows the storage of almost any data. This data may include information that allows for unambiguous identification of a respective bit holder system and thus a chisel. Instead of the electronic data carrier, it is also conceivable to provide another form of the identifier, for example in the form of an optically readable data carrier. An optically readable medium may be, for example, a barcode. Such a barcode can be inexpensively arranged on the chisel holder system. In principle, any form of machine-readable identification is suitable as identifier for the bit holder system.

If it is provided that the detection device is designed to read out the identifier without contact, then no mechanical or electrical connection between the tool and the identifier is required to transmit the data from the identifier to the detection device. The tool can thus be formed according to known tools and be extended only by the detection device. A retrofitting of existing tools with a detection device according to the invention is conceivable.

According to a particularly preferred embodiment of the invention, it can be provided that the detection device is designed to detect a position of the bit holder on which the tool is attached, on a milling drum upon actuation of the at least one trigger. The position of the bit holder system can for example be stored in the identifier and be read out accordingly. The position of the bit holder system can be a coordinate running in the axial direction of the milling drum and / or an in Circumferential direction of the milling drum extending coordinate, for example in the form of an angle, included. In this case, the extending in the circumferential direction coordinate, for example, be related to a predetermined zero line. The zero line then corresponds, for example, to a line running on the circumference of the milling drum tube in the direction of its axis of rotation. It is also conceivable to associate with each possible mounting position of the bit holder system an unambiguous position number which allows a clear identification of the position of a respective bit holder system on the milling drum.

It can advantageously be provided that the detection device has an RFID reader. The chisel holder systems are then each assigned an RFID transponder as an identifier. RFID transponders are available inexpensively in large quantities. In them data can be stored, which allow a clear identification of a chisel holder system. Also, data can be stored in them, which identify the position of the respective chisel holder system on the milling drum. The RFID transponders can be designed as active or passive RFID transponders. In this case, passive RFID transponders have the advantage that they do not need their own power supply. The RFID reader makes it possible to read the data of the RFID transponder without contact, ie without the production of an electrical or mechanical contact. This leads to a simple and inexpensive construction of the tool.

A quick and easy disassembly and / or assembly of the chisel can be achieved in that the tool has a base part on which an actuator with a Abdrückabschnitt and / or with a retraction portion is movably mounted and that the actuator directly or indirectly coupled to an actuator is. The actuator can be formed for example by a cylinder-piston system or by an electromotive unit. The Abdrückabschnitt may be formed in the form of Austreibdorns. The Abdrückabschnitt allows the expulsion of a chisel from a chisel holder. With the help of the Einziehabschnitts a chisel with his chisel shank can be pulled into a chisel holder of the chisel holder. The base allows a determination of the tool on the Toolholder system. The actuator is triggered by actuation of the at least one trigger. At the same time, by actuating the at least one trigger, the counter reading of the counter for the dismantled and / or mounted chisels is increased. If the tool is designed, for example, both for mounting and for dismantling chisels, two triggers can accordingly be provided, one triggering an assembly movement and the second disassembling the actuator. Depending on which of the triggers was actuated, then the counter reading of the counter is increased for a mounted or for a disassembled bit. It is conceivable to provide two counting devices, one of which counts the mounted and a dismantled bit. In this way, it can be detected, for example, whether all chisels have been replaced by new ones when chisels were changed. It is also conceivable to use only a trigger whose function is switchable between the triggering of an assembly and disassembly or the assembly and disassembly triggers alternately. Upon actuation of the trigger is then increased depending on the selected function of the counter reading for dismantled or for mounted chisel.

It can be provided with particular advantage that at least part of the detection device, in particular the RFID reader, is arranged on or in the actuator or on or in the base part of the tool. The responsible for the detection of the identifier portion of the detection device, such as the RFID reader, so in the assembly or disassembly of a chisel in the immediate vicinity of an arranged on the chisel holder system identifier, in particular a arranged on the chisel holder RFID transponder, are brought. This allows a trouble-free data exchange between the RFID transponder and the RFID reader. The data read by the RFID transponder, for example, allow the previously described determination of the position of the bit holder on the milling drum. A bit change can thus be assigned to a particular bit holder system and to a position on the milling drum.

In order to avoid that an erroneous operation of the at least one trigger, in which no disassembly and / or assembly of a chisel takes place, leads to a change in the specific number of disassembled and / or mounted chisels, it can be provided that the detection device is designed for this purpose to detect an actuation of the at least one trigger without a montage or disassembly of a chisel and then the number of detected assembled and / or disassembled chisel not change and / or that the detection means is adapted to a repeated actuation of the at least one Trigger within a given period of time, the number of detected assembled and / or disassembled chisels not to change and / or that the detection means is adapted to a repeated within a predetermined second period reading the same identifier, the number of detected mounted and / or de mounted chisel not to change and / or that the detection device is adapted to not change the number of detected assembled and / or disassembled chisel on actuation of the at least one trigger and a failure to read an identifier. For example, if two successive tripping operations within a predetermined period, which is chosen so short that within the period of disassembly and / or installation of two chisels is not possible, the count is not changed accordingly. If a triggering operation is carried out successively on the same bit holder system repeatedly, this can be detected by means of the same successively read identifier. Accordingly, the count of the disassembled and / or mounted chisel is not changed in this case. If no identifier is read out when the tool is triggered, it can be assumed that the tool has not been attached to any chisel holder system and therefore no chisel has been disassembled or mounted. Even then, there is no change in the count of the counting unit. It is also conceivable that the tool is designed to detect the force applied by the tool. The detection device can then be designed to conclude on the information about the applied force on whether a mounting or dismounting of a chisel has taken place.

The chisel holder system may be formed in two parts, namely from a base part connected to the milling drum and an exchangeable chisel holder held therein. If it is provided that the detection device is designed to read out an identifier arranged on a base carrier of the bit holder system and / or an identifier arranged on an exchangeable bit holder assigned to the base carrier, an assignment of an exchangeable bit holder to a base carrier can be assigned by the detection device or a control unit, to which the detection device transmits the data, are detected and checked. If, when detecting an identifier of a bit holder and a base carrier, another bit holder is determined for a base carrier, for example, than it is stored for it in the detection device or in the control unit, it is possible to conclude that the bit holder has changed. The tool thus also allows the detection and detection of changed chisel holders.

In order to recognize an exchanged bit holder, it can also be provided that the detection device is designed to read the at least one identifier arranged on a bit holder system upon actuation of the at least one trigger and to detect the position of the bit holder system on the milling drum and that the detection device is designed for this purpose is to recognize a changed, exchangeable bit holder at this position by comparing the data read from the identifier with data stored in the position detection device on the milling drum. The identifier is preferably arranged on the replaceable bit holder of the bit holder system.

Advantageously, it can be provided that the detection device has a memory and that in the memory, the data read from the identifiers and / or the times at which the respective identifiers were read, are stored and / or that the stored data and / or times associated with a count of the counter. The data can be stored together with the meter reading and transmitted to a higher-level control unit. The transfer can be done, for example, after all worn bits of a milling drum have been replaced.

A preferred embodiment variant of the invention provides that the tool has a wired interface or a radio interface for the electronic transmission of data. The interface is connected to detection device or is part of the detection device. Data can be transmitted from the detection device to a control unit via the interface and vice versa from a control unit to the detection device. This makes it possible to transmit to the control unit the number of disassembled and / or mounted chisels detected by the tool. This can be arranged for example in the milling machine. The control unit may then display the number of disassembled or mounted chisels to the operator via an indication. The tool does not have to have its own display for displaying the number of chisels exchanged. Also, further data transmitted from the identifiers to the tool, for example position data, or data derived therefrom can be transmitted via the interface to the control unit and evaluated or displayed by the latter.

In order to also be able to transmit data to the identifiers arranged on the bit holder systems, provision may be made for the tool and / or the detection device to have a data interface and for the data interface to be configured to transmit data to the data carrier which is arranged as an identifier on the bit holder system. In this way, it is possible, for example, to transfer a time of installation of a bit to the bit holder system. This can then be read out during disassembly of the bit and used to determine the service life of the bit. Also, prior to a first use of the identifiers, the data necessary for identifying the respective associated bit holder system can be transferred from the tool to the identifiers. There are thus no further devices required, which allow the description of the identifiers.

The object of the invention relating to the bit holder system is achieved by arranging at least one contactlessly readable electronic data carrier as an identifier on or in the bit holder system, and that the data carrier contains information for identifying the bit holder system and / or the position of the chisel holder system on the milling drum. By reading out the data carriers of the bit holder systems arranged on a milling drum, these can each be clearly identified and / or it is possible to determine the position of a respective bit holder system on the milling drum. As a result, in a bit change, the changed bit can be assigned to a specific bit holder system and / or to a position on the milling roller. In this way, it can be determined, for example, how often a chisel has been changed on a particular chisel holder system. Based on a milling performance of the milling drum, conclusions can be drawn from the data obtained on the wear behavior of the chisels at their respective mounting location on the milling drum. From the wear behavior predictions for the future need for chisels in continuation of the milling task can be created. It can be drawn conclusions on the material properties of the voracious underground. On the basis of this information, it is possible, for example, to set the machine parameters of the milling machine in such an optimized manner that the highest possible milling performance is achieved with the least possible wear on the bits. As a result, the efficiency of machine use and the cost of machine use can be reduced. Advantageously, the data carriers are not arranged in or on the chisels, but in or on the chisel holder systems. A disk is thus not exchanged with a required chisel change, but can be used according to the life of the chisel holder system. This can significantly reduce the number of disks needed to monitor bit replacement and wear over known systems where the tags are located in or on the bits.

A long life expectancy of the data carrier can be achieved by arranging the data carrier in a region of the bit holder system which is protected against abrasion.

According to a particularly preferred embodiment variant of the invention, it can be provided that the data carrier is an active or passive RFID transponder. RFID transponders are inexpensive in large quantities offered. In them data can be stored, which allow a clear identification of a chisel holder system or its position on a milling drum. Also RFID transponder can be provided, which makes it possible to change the stored data later. Passive RFID transponders also have the advantage that they do not require their own power supply.

Advantageously, it can be provided that the data carrier contains information about the installation time of a bit held in the bit holder system. When removing a chisel, which has reached the wear limit, thus the service life of the chisel can be determined under the past operating conditions of the milling drum and the milling machine.

It may be provided that the chisel holder system has a chisel holder fixedly connected to the milling drum and that the at least one data carrier is arranged on or in the chisel holder or that the chisel holder system has a base support fixedly connected to the milling drum and an exchangeable chisel holder releasably connected to the base support and that at least one data carrier is arranged on or in the base carrier and / or on or in the exchangeable bit holder. In one, for example, by a welded joint, fixedly connected to the milling drum bit holder, the position data of the bit holder system can be clearly assigned to the bit holder and stored in the arranged on or in the bit holder disk. In a two-part chisel holder system, which is associated with a base support and a chisel holder exchangeably connected thereto, the position data on the milling drum can be clearly assigned to the base support fixedly connected to the milling drum and thus deposited in a data carrier arranged on the base support. An exchangeable bit holder can first be mounted on any base plate. If both the exchangeable bit holder and the base carrier in which the bit holder is held have a data carrier, a clear association between a base carrier and a replaceable bit holder mounted thereon can be made on the basis of the stored data. About this assignment is thus Also, the position of the interchangeable chisel holder on the milling drum uniquely determined. When replacing the bit holder, for example, due to an advanced wear, the base carrier is assigned a new bit holder with a new identifier. This is detected when reading the arranged on the base plate and the exchangeable chisel holder data carrier. In this way, the replacement of a chisel holder can be detected and recorded. On the basis of the thus determined number of exchanged bit holder can be closed on their life under the past operating conditions of the milling drum and the milling machine. This allows a forecast of the future need for chisel holders to continue the milling task.

The object of the invention relating to the method is achieved by detecting the number of bits mounted and / or disassembled with the tool by a detector arranged on the tool and / or by the position of a tool mounted and / or dismounted bit the detection device arranged on the tool is detected and / or that the position and a unique identification of a chisel holder system, on which a chisel is dismantled or mounted, is detected by the detection device. From the number of assembled and / or disassembled chisel can be concluded directly on the number of replaced chisel and thus their wear behavior. In this case, other parameters, such as a period of use of the chisel, are taken into account. It is also possible to take into account the machine parameters provided in the milling operations carried out, with which the milling machine was operated, or the milled material. If the position of the chisel or the chisel holder on the milling drum is detected as well, a spatially resolved wear monitoring can take place. This can be evaluated, for example, whether there is an increased wear in certain areas of the milling drum. A change of an exchangeable chisel holder can be concluded when a chisel holder system with a different identification is detected during successive chisel changes at a position of the milling drum.

A simple and secure determination of the position of an exchanged bit or an exchangeable exchangeable bit holder on the milling drum may be effected by disassembling and / or mounting the position of a disassembled and / or mounted bit and / or the position of a replaceable bit holder on which a bit is detected by reading an arranged on the chisel holder system identifier. Preferably, the detection unit arranged on the tool has means with which the identifier can be read out automatically.

Fig. 1

in einer perspektivischen Seitenansicht eine Fräswalze mit daran befestigten Meißelhaltern,

Fig. 2

in einer schematischen seitlichen Schnittdarstellung ein einteiliges Meißelhaltersystem mit einem eingesetzten Meißel,

Fig. 3

in einer seitlichen Schnittdarstellung das in Fig. 2 gezeigte, einteilige Meißelhaltersystem mit einem angesetzten ersten Werkzeug,

Fig. 4

in einer perspektivischen Explosionsdarstellung ein zweiteilig ausgebildetes Meißelhaltersystem,

Fig. 5

in einer Seitenansicht und im Teilschnitt das in Fig. 4 gezeigte, zweiteilige Meißelhaltersystem mit einem angesetzten zweiten Werkzeug und

Fig. 6

in perspektivischer Darstellung einen Adapter des in Fig. 5 gezeigten, zweiten Werkzeugs.

The invention will be explained in more detail below with reference to an embodiment shown in the drawings. Show it:

Fig. 1

in a perspective side view of a milling drum with attached chisel holders,

Fig. 2

in a schematic side sectional view of a one-piece chisel holder system with an inserted chisel,

Fig. 3

in a side sectional view the in Fig. 2 shown, one-piece chisel holder system with an attached first tool,

Fig. 4

in a perspective exploded view of a two-piece formed chisel holder system,

Fig. 5

in a side view and in partial section the in Fig. 4 shown, two-piece chisel holder system with an attached second tool and

Fig. 6

in perspective an adapter of in Fig. 5 shown, second tool.

Fig. 1 shows in a perspective side view of a milling drum 80 of a milling machine, not shown, with bit holders 30 attached thereto. The bit holders 30 are attached to the outer periphery of a Fräswalzenrohrs 81 of the milling drum 80. They each formed a chisel holder system 1. The chisel holder 30 are connected directly to the Fräswalzenrohr 81 in the embodiment shown. For this purpose, the bit holder 30 are welded to the Fräswalzenrohr 81. In the chisel holders 30, chisels 70 are held. The chisels 70 are presently designed as a round shank chisel. They are each with one in the Fig. 3 and 5 shown drill collar 71 rotatable about its longitudinal axis, but axially blocked, held in the chisel holders 30.

Depending on the milling task to be performed, different milling drums 80 having different arrangements of the bit holders 30 and chisels 70 adapted to the respective milling task are used.

The chisels 70 are subject to heavy wear. They must therefore be replaced regularly. Their service life depends on the material properties of the processed substrate and on the machine parameters with which the milling machine and thus the milling drum 80 are operated.

To replace the bits 70, they can be detached from the bit holders 30 and new bits 70 inserted into the bit holders 30. For this purpose, special tools 10, 90 are used, as exemplified in the Fig. 3 and 5 are shown.

Fig. 2 shows in a schematic side sectional view of a one-piece chisel holder system 2 with an inserted chisel 70. The chisel holder 30 is mounted with a concave contact portion 31 on a roll surface 82 of the Fräswalzenrohrs 81 and welded thereto. He has the Fräswalzenrohr 81 facing away from a bulge 32.

Fig. 3 shows in a sectional side view the in Fig. 2 shown, one-piece chisel holder system 2 with an attached first tool 90. The first tool 90 is inserted with a first base part 91 in the bulge 32 of the chisel holder 30. The first base part 91 forms a cylinder in which a piston 92 is guided. The piston 92 is connected via a first piston rod 93 with a first actuator 94. The first actuator 94 forms a hook-shaped pull-in section 95 and a first push-off section 96. A first handle 97 is connected to the first base part 91. The first handle 97 carries a hydraulic unit 98, which in about Fig. 5 for a second tool 10 shown trigger 12.1 can be controlled. The hydraulic unit 98 optionally allows pressurization of the piston 92 on its opposite surfaces. Thus, the first actuator 94 is bidirectionally power operated. In the extended position shown, the first actuator 94 is inserted to an outer end of a first bit receptacle 33 of the bit holder 30 in this.

The chisel 70 has a cylindrical chisel shaft 71 around which a clamping sleeve 75 is arranged. In its free end a circumferential Einziehnut 76 is formed in the drill collar 71. At the end, the drill collar 71 forms a cylinder support part 77.

The first actuator 94 rests with its first Abdrückabschnitt 96 on the cylinder support member 77 and thus at the free end of the drill collar 71 at. It engages with its Einziehabschnitt 95 in the Einziehnut 76 a. By a corresponding pressurization of the piston 92, the first actuator 94 is moved toward the first base part 91 and thus into the first bit receptacle 33. By engaging the Einziehabschnitt 95 in the Einziehnut 76 while the drill collar 71 is retracted into the first bit holder 33 and held there with the clamping sleeve 75. The bit 70 is thus mounted on the bit holder 30 and the first tool 90 can be removed from the bulge 32. To disassemble the bit 70, the first tool 90 is again inserted with its first base part 91 in the bulge 32 and the first actuator 94 is inserted by a corresponding pressurization of the piston 92 in the first bit receptacle 33. In this case, the first actuator 94 presses with its first Abdrückabschnitt 96 against the cylinder support member 77 of the drill collar 71, whereby the bit 70 is driven out.

On the first tool 90, a detection device 110 is arranged. The detection device 110 is represented symbolically by a rectangle. The detection means 110 are associated with two counters 113, such as one schematically shown in FIG Fig. 6 is shown. Detector 110 is configured to detect a number of bits 70 disassembled with first tool 90 and a number of bits 70 mounted with first tool 90. For this purpose, with each disassembled chisel 70, the count of the first and each mounted chisel 70, the count of the second counter 113 is increased. The first tool 90 are outside the selected image detail and thus not shown associated with two triggers 12.1, one of which triggers an assembly movement and a disassembly movement of the first actuator 94. The count of the counter 113, which counts the disassembled bit 70, is increased upon actuation of the trigger 12.1, which triggers the disassembly movement. Accordingly, the count of the counter 113, which counts the mounted bits, upon actuation of the trigger 12.1, which triggers the assembly movement is increased. On the basis of the number of replaced chisels 70 thus detected, the wear behavior of the chisels 70 can be determined for the milling task performed.

The detection device 110 is attached to the first actuator 94 of the first tool 90 in the embodiment shown.

However, it is also conceivable to arrange the detection device 110 on other components of the first tool 90, for example on the first base part 91 or in the first handle 97.

Furthermore, individual assemblies of the detection device 110, as exemplified in Fig. 6 are shown arranged on different components of the first tool 90 and connected to each other, preferably electrically connected. Thus, it is conceivable to arrange the counting devices 113 in the first handle 97. An optional possible readout unit can then be advantageously arranged on the first actuator 94. However, it can also be provided on other components of the first tool 90, for example on the piston rod 93 or on the first base part 91. If possible, the readout unit is arranged on the first tool 90 in such a way that, when the first tool is attached to the second bit holder system 2, it is located close to the identifier. In the present case, the read-out unit is designed as an RFID reader 111, as shown schematically in FIG Fig. 6 is shown.

On the one-piece chisel holder system 2 and thus on the chisel holder 30, a likewise optionally possible identifier is arranged. In the present case, the identifier is designed as the first RFID transponder 100. The first RFID transponder 100 is shown schematically in the illustration as a dotted executed circle. In the identifier data of the present one-piece chisel holder system 2 are deposited. In the illustrated first RFID transponder 100 as an identifier, the data is stored electronically. However, other forms of identifiers may be used, such as optically readable identifier. Such an optically readable identifier can be, for example, a barcode which is arranged on the one-piece bit holder system 2.

The identifier can be read using the readout unit of the detection device 110, in this case with an RFID reader. The data contained in the identifier contain information which enables a unique identification of the first bit holder system 2. A chisel change can be unambiguously assigned to a specific first bit holder system 2 of the milling drum 80 on the basis of the data read out. It can be determined in this way, how many chisel changes were made to a particular first chisel holder system 2. From this it is possible to draw conclusions about the wear behavior of the bits 70 on a specific first bit holder system 2. In the present case, it is provided that the data stored in the identification mark a position of the first bit holder system 2 on the milling drum 80. The wear behavior of the chisel 70 can thus be determined spatially resolved via the milling drum 80.

Fig. 4 shows in a perspective exploded view of a two-part chisel holder system 3. The two-part chisel holder system 3, a base support 50 and a replaceable bit holder 40 are assigned. The base support 50 may be connected to a lower connection side 51 to a in Fig. 1 shown Fräswalzenrohr 81 are created and welded to it. The base support 50 is thus stationary and permanently connected to the Fräswalzenrohr 81. The base support 50 has a base body 52, in which a plug-in receptacle 53.2 is formed as a breakthrough. Side of the socket 53.2 and the replaceable bit holder 40 facing support surfaces 53.1 arranged on the base body 52. The support surfaces 53.1, together with the plug-in receptacle 53.2, form a toolholder receptacle 53. Laterally of the toolholder receptacle 53, a threaded receptacle 54 is formed in the base body 52 of the base support 50. The threaded receptacle 54 forms an opening to the plug-in receptacle 53.2. In the threaded receptacle 54, a pressure screw 55 can be screwed.

The replaceable bit holder 40 has a support body 41. On the support body 41, a plug-in projection 44 is integrally formed. The plug-in projection 44 is aligned in the mounting orientation shown in the direction of the plug-in receptacle 53.2 of the base support 50 out. It has a pressure screw receptacle 44.1 which is closed by a pressure surface 44.2 which is oriented obliquely to the longitudinal extent of the plug-in extension 44. Opposite to the plug-in projection 44 and laterally offset from this, a holding portion 43 is integrally connected to the support body 41. The holding portion 43 is cylindrical. It has a second bit receptacle 42 extending along its central longitudinal axis. The second bit receptacle 42 is formed as guided by the holding portion 43 and the support body 41 bore. Facing away from the support body 41, the holding portion 43 is closed by a wear surface 43.1. At the outer circumference of the holding portion 43, wear marks 43. 2 are formed in the surface of the holding portion 43 at different distances from the wearing surface 43. 1.

To attach the replaceable bit holder 40 to the base support 50 of the plug neck 44 of the bit holder 40 is inserted into the plug receptacle 53.2 of the base support 50 until the support body 41 rests with correspondingly shaped mating surfaces on the support surfaces 53.1 of the base support 50. In this position, the pressure surface 44.2 of the plug-in projection 44 is arranged in alignment with the threaded receptacle 54 of the base support 50. When screwing the pressure screw 55 into the threaded receptacle 54 presses this end against the pressure surface 44.2. Thus, the plug-in projection 44 is set in the socket 53.2. To disassemble the replaceable bit holder 40, the pressure screw 55 is unscrewed, whereby the plug-in projection 44 and thus the replaceable bit holder 40 are released.

According to the invention, an identifier, in the present case in the form of a second RFID transponder 101, is arranged in or on the exchangeable bit holder 40. The second RFID transponder 101 is shown schematically by a dashed circle. In the present case, the second RFID transponder 101 is positioned in a recess (not shown) in the support body 41 of the exchangeable chisel holder 40. However, it is conceivable to arrange the second RFID transponder 101 in or on the holding section 43 or in or on the plug-in projection 44.

At the base support 50, a further identifier, in this case as a third RFID transponder 102, is arranged. This is symbolically represented by a dashed circle. In the present case, the third RFID transponder 102 is arranged in a recess (not shown) in the base body 52 of the base support 50. However, it is also conceivable to attach the third RFID transponder 102 to a protected area of the surface of the base support 50.

The second and third RFID transponders 101, 102 thus form identifiers of the two-part bit holder system 3, in the present case the replaceable bit holder 40 and the base carrier 50. It is conceivable to provide only one identifier, for example on the exchangeable bit holder 40 or on the base carrier 50. Data can be stored in the identifiers. The data can be read via a corresponding readout unit, in this case a corresponding RFID reader 111, as shown in FIG Fig. 6 is shown schematically, are read.

The in the Fig. 3 to 5 shown RFID transponders 100, 101, 102 represent contactless readable, electronic data carriers. They are presently designed as passive RFID transponders 100, 101, 102. These have the advantage that they do not require their own power supply. The energy required to read out the stored data is taken from the radio signal of the RFID reader 111.

The in the in Fig. 4 shown identifiers (second and third RFID transponders 101, 102) stored data allow a unique identification of the base support 50 and the exchangeable chisel holder 40. By reading the data thus a specific, exchangeable bit holder 40 a base support 50 are assigned. If a replaceable bit holder 40 is replaced, the base carrier 50 is assigned a new replaceable bit holder 40 with a new identifier. This can be detected by reading the data of the second and third RFID transponders 101, 102. By reading out the identifiers of the base supports 50 and the respectively mounted, exchangeable bit holder 40 of a milling drum 80, the number of exchanged bit holders 40 can thus be determined. In the third RFID transponder 102 associated with the base support 50, data indicating the position of the base support 50 on the milling drum 80 are stored. These data may include a coordinate directed in the circumferential direction of the milling drum 80, for example in the form of an angle, and a coordinate running in the direction of the longitudinal extension of the milling drum 80. It is also conceivable to assign a position number to each possible position of a base support 50 on the milling drum 80 and store it in the second RFID transponder 101. By reading out the third RFID transponder 102, the position of the assigned base support 50 on the milling drum 80 can thus be unambiguously determined. This change of replaceable bit holder 40 can be determined with exact position. In this way it can be determined, for example, if the replaceable bit holder 40 has been exchanged several times on a base support 50.

It should again be pointed out here that according to the invention instead of the shown RFID transponders 100, 101, 102 also other identifiers, for example optically readable identifiers, e.g. Barcodes, can be used. The readout unit is then designed to read the used identifiers suitable.

Fig. 5 shows in a side view and in partial section the in Fig. 4 shown, two-piece chisel holder system 3 with an attached second tool 10. The base support 50 is applied with its lower connection side 51 on a not shown Fräswalzenrohr 81 and welded thereto. The plug-in lug 44 of the exchangeable chisel holder 40 is inserted into the associated plug-in receptacle 53.2 of the base support 50 and held therein by the pressure screw 55. A bit 70 is partially inserted with its bit shaft 71 into the second bit receptacle 42 of the exchangeable bit holder 40. Circumferentially to the drill collar 71 a clamping sleeve 75 is provided. This presses against the wall of the second bit receptacle 42 and engages in a circumferentially formed in the drill collar 71 groove. As a result, the bit 70 is rotatable but axially blocked, held in the second bit receptacle 42. Opposite the drill collar 71 is a bit tip 72, preferably made of a hard material, attached to a bit head of the bit 70. Between a chisel head and the holding portion 43 of the exchangeable chisel holder 40, a wear shield 74 is disposed. The free end of the drill collar 71 forms a support surface 73.

The second tool 10 has a second handle 12. At the second handle 12 of the shutter 12.1 is arranged. End contacts current contacts 11 are led out of the second handle 12. Opposite to the power contacts 11, the second handle 12 is connected to a cylinder 13. The cylinder 13 is part of a cylinder-piston system. This forms an actuator for driving a second actuator 60. It is conceivable to use other actuators instead of the cylinder-piston system, for example, electric motor-driven actuators. The cylinder-piston system is pivotally connected via a second piston rod 14 to the second actuator 60. Spaced to Ankoppelstelle the second piston rod 14, the second actuator 60 is pivotally mounted on a second base part 21 of an adapter 20 stored. The second base part 21 of the adapter 20 is applied to the exchangeable bit holder 40 and held in its position by a Abdrückteil 23, which is supported on the wear plate 74. The second actuator 60 is in the form of a bent lever 61. The free end of the second actuator 60 forms a second Abdrückabschnitt 62 in the form of Austreibdorns. This is inserted through a rear access in the second bit receptacle 42 of the exchangeable chisel holder 40. The second push-off section 62 bears against the support surface 73 of the tool shank 71 of the chisel 70. By operating the trigger 12.1, the piston arranged in the cylinder 13 is extended. This movement is transmitted via the second piston rod 14 to the second actuator 60 so that it pivots about its end bearing. In this case, the second Abdrückabschnitt 62 is pressed against the support surface 73 of the bit, whereby the drill collar 71 is pressed from the second bit holder 42, as for example from the document DE 10 2008 025 071 A1 is described.

The base carrier 50 is assigned the third RFID transponder 102 and the replaceable bit holder 40 the second RFID transponder 101. Both are shown schematically by a painted circle or a filled circle. On the second actuator 60, the detection device 110 is arranged in the region of the lever 61, as exemplified by Fig. 3 is described. This is also shown schematically by a filled circle. The detection device 110 enables the contactless reading of the data stored in the second and third RFID transponders 101, 102.

Fig. 6 shows in perspective the adapter 20 of the in Fig. 5 At the upper end of the adapter 20, a collar 15 can be seen as an end-side completion of the second piston rod 14. When mounted adapter 20, the collar 15 is in operative connection to the cylinder-piston system. Upon actuation of the trigger 12.1, the cylinder-piston system presses on the collar 15, whereby the second actuator 60 is actuated and the second Abdrückabschnitt 62 is pressed against the drill collar 71. When releasing the trigger 12.1, the cylinder-piston system is reset. In this case, the piston rod 14 by a the federal government 15 engaging spring element 22 is reset such that the second Abdrückabschnitt 62 from the second bit receptacle 42 (FIG. Fig. 5 ) is adjusted. On the second base part 21 of the adapter 20, the detection device 110 is shown schematically. In this case, the detection device 110 can be completely or partially attached to the second base part 21 or, as in FIG Fig. 5 shown to be disposed on the second actuator 60. The detection device 110 has a counter 113. The detection device 110 is further associated with the RFID reader 111. In the present case, the detection device 110 also includes a memory 114 and a radio interface 112.

With the aid of the detection device 110, the number of bits 70 mounted with the second tool 10 can be detected. For this purpose, a count of the counter 113 is increased by one upon actuation of the trigger 12.1. After completion of the maintenance, for example when all worn bits 70 of a milling drum 80 have been dismantled and replaced with new ones, the meter reading can be sent to a higher-level control unit, not shown. In the present case, this takes place wirelessly via the radio interface 112. However, it is also conceivable that the data stored in the memory 114 is wired, for example via the in Fig. 5 shown power contacts 11 to be transmitted to the control unit.

When the trigger 12.1 is actuated, the identifier arranged on the two-part bit holder system 3 or the identifiers arranged on the two-part bit holder system 3 are also read out. The identifiers are presently designed as second and third RFID transponders 101, 102. These are read without contact using the RFID reader 111. The data is stored in the memory 114. They can, together with the counter reading, be transmitted via the radio interface 112 to the control unit.

The invention is not limited to those in the Fig. 1 to 6 set embodiments. It can be transferred to any other one-piece or multi-piece bit holder systems 1, 2, 3 and the tools 10, 90 provided for changing the bits 70.

It is conceivable that the detection device 110 is assigned a data interface. The data interface is not shown in the embodiments shown. The data interface is designed to transfer data to the identifiers arranged on the bit holder systems 1, 2, 3. Thus, for example, data can be transmitted to a built-in chisel 70 or a change time of a chisel 70 to the respective identifier. These data can then be read out and evaluated at the next chisel change.

It is conceivable to increase the counter reading of the counter 113 when the trigger 12.1 is actuated only if data of at least one identifier can be read out at the same time. This ensures that the tool 10, 90 was attached to a bit holder system 1, 2, 3 when triggering a mounting or dismounting. For example, a counter reading of the counting device 113 can only be increased if an RFID transponder 100, 101, 102 is arranged in the radio range of the RFID reading device 111 and can be read out. An accidental actuation of the trigger 12.1 at not attached to the bit holder system 1, 2, 3 tools 10, 90 thus does not increase the count. After the data has been transferred, the counter status can be reset and / or the stored data can be deleted.

It is also conceivable that the counter reading for disassembled or for mounted chisel 70 is increased when the detection device 110 has read out an identifier without a trigger 12.1 being actuated. For example, it may be provided that the counter reading is increased when an RFID transponder 100, 101, 102 arranged on a bit holder 1, 2, 3 or a chisel 70 is within radio range of an RFID reader 111 arranged on the tool 10, 90 the detection device 110 passes. The data read out can be taken into account when increasing the counter reading. Thus, it can be provided that for a read identifier of the count can be changed only once within a predetermined period. This avoids that in the case of a repeated readout of an identifier, for example if a tool 10, 90 must be set twice in the chisel assembly, the meter reading is changed by more than one.

As described above, information about the position of the bit holder system 1, 2, 3 on the milling drum 80 and / or for unambiguous identification of the bit holder system 1, 2, 3 can be stored in the identifiers, in this case the RFID transponders 100, 101, 103. These data are read out by the detection device 110 when the trigger 12.1 is actuated. The chisel change that has been made can be assigned to this data and thus to a specific bit holder system 1, 2, 3 on the milling drum 80. With the aid of the detection device 110, the frequency with which the chisel 70 has been exchanged at a particular chisel holder system 1, 2, 3 of the milling drum 80 can thus be detected. This can be stored in the memory 114 and transmitted to the higher-level control unit. In addition, with the detection device 110, as described above, the total number of exchanged bits 70 can be detected.

Advantageously, the detection device 110 is arranged on the tool 10, 90. Accordingly, no detection device 110 and, for example, no RFID reader 111 or no barcode reader have to be arranged on the milling machine. As a result, the detection device 110 or the RFID reader 111 or the bar code reader are protected against high mechanical stress, as is present during operation in an arrangement on the milling machine.

• das Verschleißverhalten der Meißel 70
• Materialeigenschaften des gefräßigen Untergrundes
• die Effizienz des Maschineneinsatzes
• die Kosten für den Maschineneinsatz

für eine durchgeführte Fräsarbeit bestimmt werden. Dabei ist die Erfassung der ausgewechselten Meißel 70 mit dem erfindungsgemäßen Werkzeug 10, 90 bei geringem Aufwand kosteneffizient möglich. Mit Hilfe der Kennungen, beispielsweise in Form der gezeigten RFID-Transponder 100, 101, 102 kann zusätzlich die Position der ausgetauschten Meißel 70 mit bestimmt werden. Es kann somit das Verschleißverhalten der Meißel 70 in Abhängigkeit von ihrer Einbauposition auf der Fräswalze 80 ermittelt werden. Um dies zu ermöglichen, ist das jeweilige Meißelhaltersystem 1, 2, 3 mit zumindest einer Kennung, beispielsweise in Form eines RFID-Transponders 100, 101, 102 ausgestattet. Die Kennung kann dabei an einem Meißelhalter 30, 40 und/oder an einem Basisträger 50 des jeweiligen Meißelhaltersystems 1, 2, 3 angeordnet sein. Das Auslesen der Kennung erfolgt durch das Montage-/Demontagewerkzeug (Werkzeug 10, 90) beim montieren bzw. demontieren eines Meißels 70.On the basis of the tool 10, 90 determined number of replaced chisel 70 can

• the wear behavior of the chisel 70
• Material properties of the voracious surface
• the efficiency of machine use
• the cost of using the machine

be determined for a performed milling work. In this case, the detection of the replaced chisel 70 with the tool 10, 90 according to the invention is cost-effectively possible with little effort. With the help of the identifiers, for example In the form of the RFID transponders 100, 101, 102 shown, the position of the exchanged bits 70 can additionally be determined. It is thus possible to determine the wear behavior of the bits 70 as a function of their installation position on the milling drum 80. In order to make this possible, the respective bit holder system 1, 2, 3 is equipped with at least one identifier, for example in the form of an RFID transponder 100, 101, 102. The identifier can be arranged on a bit holder 30, 40 and / or on a base support 50 of the respective bit holder system 1, 2, 3. The identification is read out by the assembly / disassembly tool (tool 10, 90) when mounting or dismounting a chisel 70.

Based on the data thus acquired, a prognosis can be made about the life expectancy of the chisel 70. This can be taken into account when planning the maintenance intervals and the replacement bits provided. The data can also be used to plan started or future milling. The data can advantageously be stored with respect to a respective milling drum type and / or a respective milling machine on which the data was determined. Furthermore, the acquired data can be linked with further data, for example, with an expansion output (milling volume), with machine parameters with which the milling machine was operated, or with a location of use of the milling machine. This can already take place in the memory 114 or in the external memory unit to which the data is transferred.

Advantageously, the identifiers are only required on the chisel holder system 1, 2, 3, but not on the chisels 70 themselves. Due to the significantly longer service life of the bit holder systems 1, 2, 3 relative to the chisels 70, only a comparatively small number of identifiers compared to known systems, in which, for example, RFID transponders 100, 101, 103 are attached to the chisels 70, is required. However, it is also conceivable, in addition to the chisel holder systems 1, 2, 3, to provide the chisels 70 with identifiers. In these, for example, the chisel type or the material number of the chisel 70 may be stored. These identifiers can then also be read out with the detection device 110 arranged on the tool 10, 90.

In addition to the position data and data for identifying a respective bit holder system 1 further data can be stored in the associated identifier. Thus, for example, a material number or a mounting date or an assembly time of the bit holder system 1, 2, 3 and / or a chisel 70 can be stored in the identifier.

According to a conceivable embodiment, not shown, a plurality of RFID readers 111 may be arranged on the tool 10, 90. As a result, a reliable reading of the identifiers is possible even under unfavorable installation situations.

According to another conceivable embodiment variant of the invention, it can be provided that the detection device 110 is designed to read an identification of the bit holder system 1, 2, 3 upon actuation of the at least one trigger 12.1 and compare it with data stored in the detection device 110 and that a Disassembly of the chisel 70 with the tool 10, 90 is inhibited if the data read from the identifier does not match the stored data. The tool 10, 90 can thus be used only for the replacement of chisels 70 on predetermined chisel holder systems 1, 2, 3. An unauthorized chisel change is prevented.

Claims (23)

Tool (10, 90) for mounting a chisel (70) on and / or disassembling a chisel (70) from a chisel holder system (1, 2, 3) of a milling machine, in particular a road milling machine, with at least one trigger (12.1), with which an assembly and / or disassembly of a chisel (70) is triggered,
characterized,
in that the tool (10, 90) has a detection device (110) with at least one counting device (113) and that the detection device (110) is designed to produce a number of bits (70) disassembled with the tool (10, 90) and / or to detect a number of bits (70) mounted with the tool (10, 90). Tool (10, 90) according to claim 1, characterized in that the detecting means (110) is adapted to, upon actuation of the at least one trigger (12.1) a count of the counter (113) for the number of disassembled chisels (70) or increase the number of mounted bits (70) by one. Tool (10) according to claim 1 or 2, characterized in that the detection device (110) is designed, upon actuation of the at least one trigger (12.1) at least one on the chisel holder system (1, 2, 3) on which the tool ( 10, 90) is set to read out arranged identifier and / or that the detection device (110) is designed, upon actuation of the at least one trigger (12.1) at least one identifier which on that of the chisel holder system (1, 2, 3), on which the tool (10, 90) is attached, held chisel (70) is arranged to read. Tool according to claim 3, characterized in that the detection device (110) is designed to be used as an identifier on the Chisel holder system (1, 2, 3) arranged read data carriers, in particular an electronic data carrier. Tool (10, 90) according to claim 3 or 4, characterized in that the detection device (110) is adapted to read the identifier contactless. Tool (10, 90) according to any one of claims 1 to 5, characterized in that the detection means (110) is adapted to actuate the at least one trigger (12.1) a position of the bit holder system (1, 2, 3) on which the tool (10, 90) is set to detect on a milling drum (80). Tool (10, 90) according to one of claims 1 to 6, characterized in that the detection device (110) comprises an RFID reader (111). Tool (10, 90) according to one of claims 1 to 7, characterized in that the tool (10, 90) has a base part (21, 91) on which an actuator (60, 94) with a Abdrückabschnitt (62, 96 ) and / or is movably mounted with a retraction portion and that the actuator (60, 94) is indirectly or directly coupled to an actuator. Tool (10, 90) according to claim 7 and 8, characterized in that at least part of the detection device (110), in particular the RFID reader (111), on or in the actuator (60, 94) or on or in the base part (21, 91) of the tool (10, 90) is arranged. Tool (10, 90) according to any one of claims 1 to 9, characterized in that the detection means (110) is adapted to detect an actuation of the at least one trigger (12.1) without an assembly or disassembly of a chisel (70) and then not changing the number of detected mounted and / or disassembled bits (70) and / or that the detection device (110) is adapted to, upon repeated actuation of the at least one trigger (12.1) within a predetermined time period, the number of detected mounted and / or disassembled chisel (70) and / or that the detection device (110) is designed not to change the number of detected assembled and / or disassembled chisels (70) during a reading of the same identifier repeated within a predetermined second period and / / or that the detection device (110) is designed to not change the number of detected assembled and / or disassembled chisels (70) upon actuation of the at least one trigger (12.1) and a failure to read an identifier. Tool (10, 90) according to any one of claims 3 to 10, characterized in that the detection device (110) is adapted to a on a base support (50) of the bit holder system (1, 2, 3) arranged identifier and / or on read an identifier assigned to the base support (50), the exchangeable bit holder (40) arranged. Tool (10, 90) according to any one of claims 3 to 11, characterized in that the detection device (110) is designed, upon actuation of the at least one trigger (12.1) the at least one on a bit holder system (1, 2, 3) arranged Read out identifier and the position of the chisel holder system (1, 2, 3) on the milling drum (80) to capture and that the detection means (110) is adapted to by comparing the data read from the identifier with in the detection means (110) for the Position on the milling drum (80) data to recognize a replaced, exchangeable bit holder (40) at this position. Tool (10, 90) according to any one of claims 3 to 12, characterized in that the detection device (110) has a memory (114) and in that in the memory (114) read from the identifiers data and / or the times where the respective identifiers have been read out, can be stored and / or that the stored data and / or times are associated with a count of the counter (113). Tool (10, 90) according to one of claims 1 to 13, characterized in that the tool (10, 90) has a wired interface or a radio interface (112) for the electronic transmission of data. Tool (10, 90) according to any one of claims 3 to 14, characterized in that the tool (10, 90) and / or the detection device (110) has a data interface and that the data interface is adapted to the data on the chisel holder system (1, 2, 3) arranged as identifier arranged to transfer data carrier. Chisel holder system (1, 2, 3) for a milling machine, in particular a road milling machine, with at least one bit holder (40) for releasably securing at least one bit (70) to a milling drum (80) of the milling machine,
characterized,
in that at least one contactlessly readable, electronic data carrier is arranged as identification on or in the chisel holder system (1, 2, 3) and that the data carrier contains information for identifying the chisel holder system (1, 2, 3) and / or the position of the chisel holder system (1 , 2, 3) on the milling drum (80). Chisel holder system (1, 2, 3) according to claim 16, characterized in that the data carrier in a protected from abrasion region of the chisel holder system (1, 2, 3) is arranged. Chisel holder system (1, 2, 3) according to claim 16 or 17, characterized in that the data carrier is an active or passive RFID transponder (100, 101, 102). Chisel holder system (1, 2, 3) according to one of claims 16 to 18, characterized in that the data carrier contains information about the installation time of a chisel (70) held in the chisel holder system (1, 2, 3). Chisel holder system (1, 2, 3) according to one of claims 16 to 19, characterized in that the chisel holder system (1, 2, 3) has a fixedly connected to the milling drum (80) bit holder (30) and that the at least one disk or in the bit holder (30) or that the bit holder system (1, 2, 3) has a base support (50) integral with the milling drum (80) and an exchangeable bit holder (40) removably connected to the base support (50) and that at least one data carrier is arranged on or in the base carrier (50) and / or on or in the exchangeable bit holder (40). Method for monitoring the wear of chisels (70) and / or interchangeable chisel holders (40) on chisel holder systems (1, 2, 3) of a milling drum (80) of a milling machine, in particular a road milling machine, whereby the chisels (70 ) are removed from the bit holder systems (1, 2, 3) by means of a tool (10, 90) and / or wherein the bits (70) are attached to the bit holder systems (1, 2, 3) by means of the tool (10, 90) and determining the wear behavior of the bits (70) and / or the exchangeable bit holder (40) based on the number of exchanged bits (70) and / or the number of exchangeable exchangeable bit holders (40),
characterized,
in that the number of chisels (70) mounted and / or dismantled with the tool (10, 90) is detected by a detection device (110) arranged on the tool (10, 90) and / or that the position of a tool (10 , 90) assembled and / or disassembled bit (70) from the on the tool (19, 90) arranged detecting means (110) is detected and / or that the position and a unique identification of a chisel holder system (1, 2, 3) to which a bit (70) is dismounted or mounted is detected by the detector (110). A method according to claim 21, characterized in that the position of a disassembled and / or mounted chisel (70) and / or the position of a replaceable chisel holder (40) on which a chisel (70) disassembled and / or mounted, is detected by reading an identifier arranged on the bit holder system (1, 2, 3). A method according to claim 21 and 22, characterized in that a tool according to one of claims 1 to 15 and / or a chisel holder system (1, 2, 3) is used according to one of claims 16 to 20.

Images