WO2014012821A1 - Procédé et composants destinés à fabriquer un ensemble outil pour une machine de perçage de trous profonds - Google Patents

Procédé et composants destinés à fabriquer un ensemble outil pour une machine de perçage de trous profonds Download PDF

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Publication number
WO2014012821A1
WO2014012821A1 PCT/EP2013/064488 EP2013064488W WO2014012821A1 WO 2014012821 A1 WO2014012821 A1 WO 2014012821A1 EP 2013064488 W EP2013064488 W EP 2013064488W WO 2014012821 A1 WO2014012821 A1 WO 2014012821A1
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WO
WIPO (PCT)
Prior art keywords
adapter
adapter piece
drill pipe
tool
machine
Prior art date
Application number
PCT/EP2013/064488
Other languages
German (de)
English (en)
Inventor
Andreas Bernt
Gerhard Mack
Original Assignee
Tbt Tiefbohrtechnik Gmbh + Co
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 Tbt Tiefbohrtechnik Gmbh + Co filed Critical Tbt Tiefbohrtechnik Gmbh + Co
Priority to EP13734789.4A priority Critical patent/EP2872276A1/fr
Publication of WO2014012821A1 publication Critical patent/WO2014012821A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B31/00—Chucks; Expansion mandrels; Adaptations thereof for remote control
    • B23B31/02—Chucks
    • B23B31/24—Chucks characterised by features relating primarily to remote control of the gripping means
    • B23B31/26—Chucks characterised by features relating primarily to remote control of the gripping means using mechanical transmission through the working-spindle
    • B23B31/261—Chucks characterised by features relating primarily to remote control of the gripping means using mechanical transmission through the working-spindle clamping the end of the toolholder shank
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B31/00—Chucks; Expansion mandrels; Adaptations thereof for remote control
    • B23B31/02—Chucks
    • B23B31/24—Chucks characterised by features relating primarily to remote control of the gripping means
    • B23B31/26—Chucks characterised by features relating primarily to remote control of the gripping means using mechanical transmission through the working-spindle
    • B23B31/261—Chucks characterised by features relating primarily to remote control of the gripping means using mechanical transmission through the working-spindle clamping the end of the toolholder shank
    • B23B31/263—Chucks characterised by features relating primarily to remote control of the gripping means using mechanical transmission through the working-spindle clamping the end of the toolholder shank by means of balls
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B51/00—Tools for drilling machines
    • B23B51/04—Drills for trepanning
    • B23B51/0486—Drills for trepanning with lubricating or cooling equipment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2231/00—Details of chucks, toolholder shanks or tool shanks
    • B23B2231/04—Adapters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B51/00—Tools for drilling machines
    • B23B51/06—Drills with lubricating or cooling equipment
    • B23B51/063—Deep hole drills, e.g. ejector drills

Definitions

  • the invention relates to a method for producing a tool unit for a deep drilling machine according to the preamble of claim 1.
  • a replaceable tool head is releasably secured to a drill pipe.
  • the invention further relates to a tool unit for a deep drilling machine according to the preamble of claim 6.
  • the tool unit has a drill pipe and a replaceable tool head detachably fastened or fastened to the drill pipe.
  • Deep hole drilling is a special drilling method used primarily to make holes from 1mm to 1,500mm diameter with a hole depth greater than three times the diameter, with very deep holes having a depth / diameter ratio larger 200 can be produced.
  • a tooling unit for deep drilling usually has a drill pipe that acts like an extension and a tool head attached to the front end of the drill pipe, on which one or more cutting edges are arranged.
  • a tool head, with which a drilling operation can be performed, is commonly referred to as a drill head.
  • a characteristic feature of deep drilling is a continuous supply of cooling lubricant under pressure and a constant removal of chips without swarf strokes. This means that even deep holes can be made by the deep drilling in one go, and the tool unit does not have to be removed in between for the purpose of removing from the bore.
  • BTA deep drilling which is also referred to as STS (Single Tube System) deep drilling
  • Ejector deep drilling also known as deep drilling with a two-pipe system
  • BTA or STS deep hole drilling the cooling lubricant is supplied from outside via a special coolant lubricant supply system, whereby the cooling lubricant is forced under pressure into an annular space between the outside
  • the coolant and chip return is carried out by a cavity channel provided in the interior of the deep hole drilling tool.
  • Ejector deep drilling is a variant of BTA deep drilling.
  • Ejector deep drilling uses a drill pipe with two concentrically arranged tubes, an outer tube and an inner tube.
  • the supply of the cooling lubricant takes place through a coolant supply device in an annular space between the outer tube and the inner tube.
  • the coolant flows along in the annular space of the drill pipe and emerges laterally outwards in the hole at the front of the tool head or drill head and flows around it from the outside. Subsequently, the cooling lubricant flows back together with the chips, in the inner tube, which forms the cavity channel.
  • Drilling heads or other tool heads are usually screwed to the drill pipe via a connection head formed on the tool head, which has a corresponding connection thread at the machine-distal end for this purpose. If the connection threads of the drill pipe and the tool head do not match, an adapter pipe provided with threaded sections on both sides can be attached to the drill pipe be screwed, which fits at its tube-side end to the connection thread of the drill pipe and at the other end has a connection thread to the tool head matching connection thread. The adapter tube then forms the free end of the drill pipe.
  • the connection threads can be designed as external threads or internal threads. The most common thread types are single-start and four-start threads.
  • the tool head When changing the tool head, the tool head is released by hand using a hook wrench and unscrewed from the drill pipe. The new tool head is inserted with its pipe-side connection section in or on the drill pipe and tightened by hand with the hook wrench.
  • Such a tool head change usually takes between 1 and 20 minutes, depending on the diameter of the tool head.
  • a flange connection between the drill pipe and the tool head may be provided.
  • a tool unit and a method for its production are to be provided, which enable an automated tool head change.
  • an automated tool head change is to be made using commercially available drill pipes or drill heads.
  • the invention provides a method for producing a tool unit for a deep hole drilling machine with the features of claim 1. Furthermore, a tool unit for a deep hole drilling machine having the feature of claim 6 is provided. In addition, an adapter unit having the features of claim 20 is provided.
  • a drill pipe which has a machine-end with means for receiving the drill pipe to a work spindle of the deep hole drilling machine and a machine-distal end with a first connection structure for mounting a tool head. Furthermore, a tool head is used, which has a second connection structure.
  • the first and the second connection structure can be designed, for example, as mating connection threads, which allow the tool head to be screwed directly to the machine-distal end of the drill pipe. However, it is not mandatory that the first and the second connection structure match each other directly.
  • the tool head is attached to the drill pipe with the interposition of a multi-part adapter unit in the method according to the invention.
  • a first adapter piece of the adapter unit is connected to the drill pipe
  • a second adapter piece of the adapter unit is connected to the tool head and the first and the second adapter piece are rotatably and centered connected by means of corresponding first and second interface structures of an adapter interface.
  • the first adapter piece preferably has at its machine-side end a first connection structure corresponding to the first connection structure of the drill pipe for connection to the drill pipe and first interface structures of the adapter interface at its machine-distal end.
  • the second adapter piece has, at its machine-distal end, a second connection structure corresponding to the second connection structure of the tool head for connection to the tool head and to its machine-side End of second interface structures of the adapter interface.
  • the terms “near the machine” and “remote from the machine” here refer to the orientation of these ends in the assembled state of the tool unit, wherein the drill pipe is the machine-related component of the tool unit.
  • the multi-part adapter unit for the tool head change particularly advantageous new interface in the form of the adapter interface between drill pipe and tool head is inserted.
  • the newly inserted interface can be optimized with regard to an automatic tool head change.
  • the deep hole drilling machine can be retrofitted much faster than before for the processing of different workpieces and / or for the implementation of different Tiefbohrprozes- se.
  • the preparation of the connection between the first adapter piece and the drill pipe can take place before or after the connection of the second adapter piece with the tool head, possibly also simultaneously with it. Often it will be advantageous if two or more similar or different tool heads are already prepared for the Bohrkopf Touch by corresponding second adapter pieces are connected to the tool heads.
  • the prepared in this way units with a tool head and an associated second adapter piece, which are referred to in this application as a tool head units can be kept in appropriate storage locations for later tool head change.
  • a suitable first adapter piece can be attached to the drill pipe so that the drill pipe is prepared for receiving different preassembled tool head units. Such a pre-assembled unit with drill pipe and first adapter piece is referred to in this application as a drill pipe unit.
  • the first connection structure formed on the drill pipe is configured as a connection thread (external thread or internal thread)
  • the second connection structure formed on the tool head is designed as a connection thread (internal thread or external thread) that corresponds to this connection thread.
  • the first adapter piece can be connected by screwing directly to the drill pipe and the second adapter piece can be connected by screwing directly to the tool head.
  • a flange connection can also be provided.
  • a flange element can be provided on the machine-distal end of the drill pipe and a mating flange element mating thereto can be provided on the first adapter piece, which are connected to one another by screws, for example.
  • a corresponding connection may be provided between the second adapter piece and the tool head.
  • Flange connections have the advantage that the elements to be joined together do not have to be rotated against each other during the manufacture and release of the connection.
  • the necessary adaptation or adaptation can be achieved with the aid of the multi-part adapter unit.
  • the use of a conventional adapter tube can then be dispensed with since the adapter unit then have a mechanical dual function (providing the adapter interface and adaptation of the tube-side and head-side connection structures).
  • a media transfer for controllable tool systems can be provided via the adapter interface.
  • the first and the second adapter pieces are inserted into one another via an axial relative movement for the purpose of establishing the connection between the adapter pieces.
  • axial in this application generally refers to a direction parallel to the central longitudinal axis of the tool unit, which corresponds to the axis of rotation of the tool unit during operation.
  • the adapter interface is designed in these cases as a plug connection. This makes it possible to dispense with the mounting of the tool head on the drill pipe on relative rotations between these components.
  • Axial connectors are particularly well suited for automation of tool head replacement.
  • the adapter pieces can be screwed directly into one another under relative rotation in order to produce a screw connection.
  • This may be desirable, for example, if there is an automated means for rotating the drill pipe about its axis and / or automated means for rotating the tool head about its axis.
  • the first and the second adapter piece can then have matching threads at the adapter interface as interface structures, which allow direct screwing of one of the adapter pieces into the other adapter piece.
  • one of the adapter pieces in particular the drill adapter to be attached to the drill pipe, ie the machine-side first adapter piece, has an interface structure with a ner conical receptacle having an inner cone and the other adapter piece, in particular the tool adapter associated with the second adapter piece, a corresponding interface structure having a corresponding to the inner cone outer cone.
  • a conical connection offers potential for high clamping forces.
  • At least one recess or depression is formed on the outer surface of the outer cone, which can serve as an engagement structure for one or more locking elements of a locking device.
  • the recess may be formed as a circumferential clamping groove, preferably with inclined side surfaces.
  • the interface structure with outer cone can also be designed in the manner of a hollow shaft cone (HSK).
  • engagement structures for one or more locking elements may be formed in the interior of the hollow shaft cone.
  • first adapter piece and the second adapter piece have corresponding driver structures which engage in the axial mating of the first and the second adapter piece for producing a positive direction in the circumferential direction positive connection.
  • corresponding toothings or projections or recesses may be provided on mutually facing end faces of the adapter pieces, if necessary, one or more dowel pins may also be used, which engage in corresponding bores when plugged together.
  • the first adapter piece and the second adapter piece are axially locked after the axial assembly by means of a locking device which can be actuated on the machine side.
  • a locking device which can be actuated on the machine side.
  • the adapter pieces coupled to one another are secured against loosening of the plug-in connection by means of a form fit acting in the axial direction.
  • a separation of the tool unit in the area of the adapter interface is then possible only after unlocking or after the opening of the locking device.
  • elements of the locking device are designed such that in the manufacture of the locking configuration, in which the adapter pieces are secured in the axial direction by positive engagement against loosening of the connection, additionally acting in the axial direction of the tool unit retraction force is generated.
  • the adapter unit can be additionally stabilized in the area of the adapter interface.
  • a locking device can be designed so that it can be controlled by means of an electric drive from the side of the deep hole drilling machine.
  • the locking device is actuated hydraulically.
  • possibly existing hydraulic units can be used anyway on the deep hole drilling machine for the cooling lubricant supply.
  • a locking can be provided by means of spring force.
  • the locking device has an axially displaceable actuating rod, which is coupled on the machine side to a piston which is arranged displaceably in a cylinder chamber. is net.
  • the cylinder chamber can be connected via a first control line to the pressure side of a hydraulic pump.
  • the actuating rod has an axially continuous passage, the machine side is connected to a second control line, which may be a constituent part of a hydraulic tool control system for actuating a controllable cutting edge of the tool head.
  • the actuator rod may also have two, three or more separate axial passageways to facilitate the control of more complex tool heads.
  • a drill pipe can have, in particular for this case, a first control line which can be connected to a first hydraulic pump and a second control line which can be used independently and can be connected to a second hydraulic pump.
  • the control lines can be fixed in the drill pipe by means of suitable holders.
  • a pressure-tight closing quick-plug coupling for a fluid control medium is provided in some embodiments.
  • a first coupling part on the drill pipe side and a second coupling part on the tool head side are preferably designed such that a possible skew offset and / or axial offset is automatically compensated for when coupling the tool head unit to the drill pipe unit.
  • a pressure-tight connection for fluid control medium such as hydraulic fluid can be created.
  • the coupling parts of the quick-release coupling in the coupled state are jointly axially movable. Then, the clutch can remain tightly closed during a Betrelirshubes an actuating rod.
  • the recirculation of cooling lubricant and chips is effected by a cavity channel formed in the interior of the tool unit, so that with corresponding drill heads at least one cavity channel extending from the machine-distal end to the machine-near end is provided.
  • at least one continuous cavity channel communicating therewith can also be provided on the first adapter piece, which leads into the interior of the drill pipe when the tool unit is assembled.
  • a piston chamber is formed in the first adapter piece, in which a piston element is accommodated, which is movable by application of hydraulic pressure against the force of a piston spring in the piston chamber , Wherein at least one hydraulic channel leads from the piston chamber in the direction of the first connecting pieces formed on the first adapter piece.
  • the piston chamber is in preferred embodiments an annular space and the associated piston element is an annular piston element, wherein the annular space and the piston element enclose an axially continuous channel in the interior of the first adapter piece.
  • control fluid eg oil
  • the Drill tube coaxial with a cylindrical inner tube used whose outer diameter is slightly smaller than the inner diameter of the drill pipe, so that an axially continuous annular gap remains between the drill pipe and the inner tube. This can be used to supply Steuerfluid in the direction of the adapter unit, while the cavity channel for chip return in the inner tube runs.
  • An automated tool head change is particularly fast and easy if the tool head unit (tool head and second adapter attached thereto) reliably detected by a gripper unit of a tool head changing system and can be connected in the correct position with the mounted on the drill pipe first adapter piece.
  • gripper structures are formed on the outside of the second adapter piece, which are adapted to corresponding counter-structures on the gripper unit such that a tool head unit gripped by a gripper unit has a predefined axial position relative to the gripper unit and preferably also a predefined rotational position relative to the gripper unit Gripper unit occupies.
  • the tool head unit for drill pipe unit can be positioned exactly and the interface structures of the adapter interface can interlock without unwanted collision.
  • the gripper structures can have one or more gripper grooves which are partially or completely circumferential in the circumferential direction.
  • the invention also relates to an adapter unit of the type described in this application.
  • the multi-part adapter unit preferably consists of exactly two detachably connectable units (the adapter pieces).
  • An adapter piece may be constructed in one piece (only one component) or in several pieces from a plurality of assembled elements.
  • the invention also relates to a deep hole drilling machine with an automatic tool head changing system.
  • the tool change head system preferably has one or more adapter units of the type described in this application.
  • FIG. 1 shows a schematic longitudinal section through an embodiment of a tool unit for a deep drilling machine, wherein the tool unit has a tool head in the form of a BTA
  • FIG. 2 shows an enlarged detail of the tool unit of FIG. 1 in the region of the adapter interface between the adapter pieces of the adapter unit;
  • FIG 3 shows a schematic longitudinal section through another embodiment of a tool unit for a deep drilling machine, the tool unit having a drill head with a controllable cutting edge for boring a predrilled bore;
  • FIG. 4 shows an enlarged detailed representation of a section of the tool unit from FIG. 3 in the region of the adapter interface.
  • FIG. 1 is a schematic longitudinal section through an embodiment of a tool unit 100 for a deep hole drilling machine in a Bohrkopf cooking tooleic acid (assembly), namely a drill oil feeder 192 and a drill bushing 194 supported thereon, and a rotary union 196 are shown in dashed lines.
  • a drill oil feeder 192 and a drill bushing 194 supported thereon namely a drill oil feeder 192 and a drill bushing 194 supported thereon, and a rotary union 196 are shown in dashed lines.
  • the tool unit has a metallic drill pipe 110 with a cylindrical cross-section, at the machine-near end of which devices for receiving the drill pipe are attached to a work spindle of the deep hole drilling machine. Using the work spindle, the tool unit can be rotated about the tool axis 102 during operation.
  • a first connection structure 1 12 is formed in the form of a connection thread, which is designed as a four-thread internal thread for connecting a commercial drill head or other tool head with a corresponding four-course external thread.
  • Other pipe coupling threads are possible, as well as other pipe sections.
  • the machine-distal end of the tool unit is formed by a replaceable tool head 130, which in the exemplary case is a commercially available BTA solid drill head, which makes it possible to insert deep holes into a workpiece in the deep drilling method without prior predrilling.
  • the tool head is also referred to below as a drill head 130 in the following.
  • the drill head has one or more cutting edges 132 in the area of its machine-distal end face and a plurality of axially extending guide rails 134 on its circumference.
  • a second connecting structure 136 in the form of a four-turn external thread is formed at the machine-end end of the drill head, with the aid of which the drill head 130 directly projects into the internal thread 1 12 at the front end of the drill pipe could be screwed.
  • drill head 130 In the region of the off-machine face of the drill head are one or more chip collection ports, from which an axial cavity channel 138 leads through the externally threaded section to the machine-proximate end.
  • Commercially available drill heads can be used, for example as described in DE 10 2010 018 959 A1.
  • the drill head 130 is not directly (directly) connected to the drill pipe 1 10, but indirectly with the interposition of a multi-part adapter unit 150 coaxial with this attached to the drill pipe.
  • the adapter unit has a first adapter piece 160 on the side of the drill pipe and a second adapter piece 170 on the side of the drill head.
  • the adapter pieces can be fastened together or detached from one another by means of corresponding interface structures of an adapter interface 200.
  • the multi-piece first adapter 160 is constructed so that it can be connected directly to the off-machine end of the drill pipe and has an axially continuous cavity channel for chip return to the drill pipe.
  • a first connection structure 162 in the form of an external thread is formed on a first sleeve-shaped base element 161 of the first adapter piece 160, which fits to the connection thread 12 of the drill pipe, so that the first adapter piece 160 can be screwed into the front end of the drill pipe 110.
  • the machine-distal end of the first adapter piece 160 is formed by a second base member 163, which is also sleeve-shaped and can be bolted directly to the first base member 161 via interlocking threads.
  • the conical seat 210 with inner cone is part of the first interface structure of the adapter interface 200.
  • the first adapter piece 160 has a third base element 164 in the form of an inner sleeve which is screwed directly to the first base element 161 from the machine-distant side.
  • the inner sleeve is designed such that in the assembled state between the outer second base member 163 and the inner sleeve 164, an annular space 165 forms, which encloses the inner sleeve and the axial cavity channel leading through this and closed to the machine end of the end face of the first base member 161 becomes.
  • an axially displaceable sliding sleeve 166 is inserted, which is supported via a compression spring 167 on an annular collar of the inner sleeve and is movable against the force of this spring. From the piston chamber 165, a plurality of hydraulic passages 168 pass through the first base member 161 to the annular gap 15.
  • An off-machine portion of the piston member 166 contacts a group of internal clamping balls 169 which are internal depending on the axial position of the piston member Locking position or are arranged in an outwardly released release position.
  • the piston member 166 and the clamping balls 169 are functional components of a hydraulically actuated locking device, which can be machine-operated through the drill pipe.
  • the drill bit assigned to the second adapter piece 170 is a relatively easy to produce, substantially sleeve-shaped metallic component.
  • a second connecting structure in the form of an internal thread 172 is provided, by means of which the second adapter piece can be screwed onto the external thread 136 of the drill head.
  • a second interface structure of the adapter interface is formed, which has the shape of a terminal cone 220 with an outer cone 222 corresponding to the inner cone at the machine distal end of the second adapter piece and having the same cone angle.
  • a trapezoidal outwardly widened outer groove 224 (clamping groove) is incorporated on the outer cone, which is a functional part of a locking device.
  • the cone angles of the inner cone and the outer cone are selected at about 5 ° such that a centered conical connection without self-locking arises, which can be solved without a separate ejector.
  • driver structures 226 are provided in the form of serrations on mutually facing end surfaces, which engage in the axial mating of the first and the second adapter piece for producing a circumferentially effective form-fitting connection. This ensures safe torque transmission in the area of the adapter interface.
  • a trapezoidal in cross section On the cylindrical part of the outer periphery of the second adapter piece 170 is a trapezoidal in cross section, inwardly tapered gripper groove 174 is incorporated, in which a corresponding gripper bar a gripper unit 250 of an automatic drill head changing system can intervene for the Bohrkopfcic.
  • the gripper unit which can also be referred to as a gripper for a short time, can be constructed, for example, as gripping tongs.
  • the mutually corresponding first and second interface structures on the first adapter piece or on the second adapter piece belong to an adapter interface 200, which is designed as a plug connection and which allows the drill head unit (with the second adapter piece) with the drill pipe unit (with the first adapter piece) automatically centered exactly with high clamping force and at the same time ensure a secure torque transmission between drill pipe and drill head.
  • a drill head change can be carried out, for example, as follows. In an initial situation, the tool unit 100 is completely assembled in the manner shown in FIGS. 1 and 2 by the drill head unit (drill head with screwed-on second adapter piece) with the drill pipe unit (drill pipe with screwed-in first adapter piece) via the adapter interface 200th centered and coupled rotatably.
  • the pincer-like gripper unit 250 engages the second adapter piece 170 and builds up the clamping pressure.
  • the gripper grooves 174 incorporated in the adapter piece prevent a displacement of the drill head in the axial direction and a rotation about the axial direction, so that the drill head is gripped axially and in the correct direction in the circumferential direction.
  • the hydraulic pressure in the annular gap 1 15 between inner tube and drill pipe is removed.
  • the sliding sleeve moves under the action of the spring force of the compression spring 167 in the direction of the drill pipe and releases the space for radial deflection of the clamping balls 169 to the outside.
  • the drill head unit is unlocked and the gripper, the adapter piece with the drill head with an axially guided working movement forward (in the drawing to the left) decrease.
  • the drill head unit is separated from the drill pipe unit in the area of the interface, ie in the area of the adapter interface 200.
  • the gripper can then place the drill head unit in a free storage space.
  • the gripper engages a corresponding drill head unit and brings them into an axial position in a defined Distance in front of the drill pipe unit. Then the gripper moves parallel to the axis direction to the position "tool change" in the direction of the drill pipe.
  • the adapter piece with drill head is secured in the gripper 250 by means of corresponding gripper grooves against rotation. Thus, a retraction in the integrated torque driving is easily possible.
  • the annular gap 1 15 between the inner pipe and the drill pipe is pressurized with hydraulic pressure.
  • the sliding sleeve 166 moves in the direction of the drill head and presses the clamping balls 169 into the clamping groove 224 worked on the drill head-side tool taper.
  • the special trapezoidal shape of the clamping groove with inlet slopes produces an axial pull-in force, which the second adapter piece together with the one carried by it Drill head into the tool taper (inner cone). Due to the positive locking by means of the clamping balls 169 in conjunction with a control valve mounted check valve a secure hold of the tool is guaranteed even with a pressure drop of the hydraulic.
  • the plane system in conjunction with the conical coupling surfaces in the area of the adapter interface results in a very rigid connection.
  • the torque driving takes place in a form-fitting manner via the intermeshing driver structures 226.
  • FIGS. 3 and 4 An alternative embodiment of a tool unit 300 will be explained with reference to FIGS. 3 and 4, which in the example can be used for boring an existing hole and for this purpose has a drill head 330 with a controllable cutting edge 332. Similar to FIG. 1, the tool unit is shown in a drill head change position, a drill oil feeder 392 and a drill bush 394 supported by it are shown with dashed lines.
  • the Bohrölzuschreib takes place similar to the embodiment of FIG. 1 from the outside through an annular gap.
  • the chip removal from the area of the drill head takes place through the already pre-drilled hole, ie parallel to the feed direction. In the case of such tool units, no cavity channel for chip return to the machine must therefore be provided in the interior of the tool unit, so that other constructive possibilities for the internal structure result.
  • the tool unit 300 has a metallic drill pipe 310 with a cylindrical cross-section, at the machine-near end of which devices for receiving the drill pipe are attached to a work spindle of the deep drilling machine. In operation, the tool unit is rotated about the tool axis 302 by means of the work spindle.
  • a first connection structure in the form of a four-pass internal thread 312 is provided for connecting a standard drill head with the corresponding four-turn external thread.
  • the replaceable drill head 330 At the machine-distal end of the tool unit is the replaceable drill head 330, which bears a radially controllable cutting edge 332 opposite a guide rail 334, which can be delivered hydraulically. As a result, the diameter of an already pre-drilled bore can be extended by drilling.
  • a second connection structure 336 is formed in the form of a four-course internal thread. The drill head 330 could be fastened to the drill pipe with the interposition of a one-piece adapter with external thread on the drill head side and drill pipe-side internal thread.
  • the drill head 330 is indirectly attached thereto with the interposition of a multi-part adapter unit 350 coaxial with the drill pipe.
  • the adapter unit 350 has a first adapter piece 360 on the side of the drill pipe and a second adapter piece 370 on the side of the drill head.
  • the adapter pieces can be coupled or detached from one another with the aid of corresponding interface structures of an adapter interface 400.
  • the first adapter piece 360 to be mounted on the side of the drill pipe has at the machine-near end of its base element 361 a first connection structure 362 in the form of an external thread, which can be screwed directly into the internal thread 312 at the machine-distal end of the drill pipe.
  • a plurality of support strips 314 are mounted, which center the first adapter piece or the drill pipe unit for the drill head change in Bohrölzufuhpparat.
  • a cone receptacle 310 is formed with an inner cone whose cone angle is dimensioned such that slight self-locking occurs when it is drawn in by the automatic tensioning unit on the corresponding counter-cone.
  • the cone receptacle 310 is part of the first interface structure of the adapter interface 400, which is designed as a hollow shaft taper interface (HSK interface).
  • HSK steep taper
  • the second adapter piece 370 assigned to the drill head 330 has a main body 371, at the machine-distal end of which a second connection structure in the form of an external thread 372 is provided, with the aid of which the second adapter piece can be screwed into the internal thread of the drill head 330.
  • a second interface structure of the adapter interface 400 is formed, which has the shape of a hollow shaft cone 320 with an outer cone 322 which corresponds to the inner cone at the machine-distal end of the second adapter piece and has the same cone angle.
  • the adapter interface 400 has to fulfill several requirements in embodiments for controllable tool systems, since in addition to a centered and rotationally fixed mechanical coupling of the adapter pieces also a reliable media transfer for the used for controlling the drill head control medium (eg hydraulic oil) must be ensured.
  • the facilities provided for this purpose are explained in more detail below.
  • the adapter unit 350 utilizes the advantages of a hollow shaft taper interface for the mechanical connection of the two adapter pieces 360, 370 and is constructed so that the first adapter piece and the second adapter piece are assembled after the adapter pieces have been assembled axially (by inserting the hollow shaft cone 320 into the taper receptacle 310).
  • the locking device includes a group of locking elements 382 pivotally mounted in the base body 361 in the region of the cone receptacle 310, the radial pivoting movement of which is controlled by the axial movement of an actuating rod 384 guided axially movably in the interior of the first adapter piece 360.
  • a control 385 is mounted with an outer contour, which is designed so that the front ends of the locking elements are pivoted during retraction of the actuating rod in the direction of deep hole drilling machine in the locking position shown in Fig. 4 to the outside, on inner inclined surfaces engage the hollow shaft cone while pulling the mounted on the second adapter piece 370 hollow shaft taper 320 axially under tension into the cone seat 310 with a suitable retraction force.
  • the axial working movements of the actuating rod are hydraulically controlled.
  • the machine-near end of the actuating rod in the manner of a piston 386 is configured, which is radially sealed in the interior of a cylinder chamber 388 is arranged, which is connected on the machine side via a first control line 389 to the pressure side of a hydraulic pump.
  • the actuating rod 384 is guided inside the main body 361 and is biased by means of the operating rod enclosing spring assembly 391 to the machine end, so that the hydraulic pressure for the Entriegelungshub is applied against the force of the spring assembly and in the absence of pressure in the first control line 389 the Drill head unit is locked to the drill pipe unit.
  • a hydraulic tool control system For controlling the cutting edge 332 and / or another controllable functional unit of the controllable drill head 330, a hydraulic tool control system is provided. These include on the side of the drill pipe, a second control line 392, which leads from the associated ma- machine side hydraulic unit to a mounted inside the drill pipe connection element 393, which has on its off-machine side a communicating with the second control line, central blind hole in which a machine side End portion of the actuating rod 391 can dip.
  • the actuating rod is essentially tubular, wherein an axially continuous passageway is formed in the interior of the actuating rod, which leads through the region of the locking elements 382 through to the machine-distal end face of the actuating rod. The machine-distal end thus protrudes into the interior of the second adapter piece when the tool unit is assembled.
  • a pressure-tight closing quick-plug coupling 395 is provided for the fluid control medium.
  • the detachable separation point between the elements belonging to the drill pipe unit and the elements belonging to the drill head unit is shown in FIG. 4 with a dashed line.
  • the drill pipe-side coupling part and the drilling-head-side coupling part are designed so that any skew offset and axial offset are automatically compensated when the drill head unit is coupled to the drill pipe unit.
  • the drill head coupling part is attached to a bolt 373 which can be moved axially within the body 371 of the second adapter piece against the force of a helical compression spring 374.
  • the bolt 373 has an axial through hole whose drill head end has a cylindrical extension in the when the drill head unit is assembled, a tube 375, which is sealed to the drill head, is inserted.
  • the sealed fluid connection between the second adapter piece 370 and the drill head 330 mediated via the tube 375 is automatically produced when these parts are screwed together.
  • the control medium operates in the interior of the drill head a piston which actuates a feed element with inclined surfaces, which cooperates with inclined surfaces on a carrier of the controllable cutting edge in the manner of a wedge drive to deliver the blade radially depending on the hydraulic pressure.
  • the drill head change is carried out automatically analogously to the manner already described by means of an automatic drill head changer, which has a gripper 450, which can engage in the clamping groove 324 on the circumference of the second adapter piece 370.
  • the tool head is in each case designed as a drill head (full drill head or Aufbohrkopf), so that the tool head unit as a drill head unit and the tool head change can also be referred to as Bohrkopf loudness.
  • the tool head used is a drill head that can be used exclusively for drilling.
  • Tool heads can also be designed for one or more other machining processes.
  • a tool head may e.g. a combination tool head, on which two or more different, possibly separately controllable tool elements (for example peeling blade, roller burnishing element, drill bit, etc.) can be attached. It can be e.g. to handle a 2-fold combination tooling head for peeling and curling, or a 3-fold combination tool head, e.g. for boring, peeling and rolling.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Drilling Tools (AREA)
  • Earth Drilling (AREA)

Abstract

L'invention concerne un procédé qui est destiné à fabriquer un ensemble outil (100) pour une machine de perçage de trous profonds et qui comporte la fixation démontable d'une tête d'outil (130) échangeable, s'agissant par exemple d'une tête d'alésage, sur une tige de perçage (110). Ladite tige de perçage présente une extrémité côté machine qui comporte des dispositifs destinés à recevoir la tige de perçage sur un arbre de travail de la machine de perçage de trous profonds, et une extrémité opposée à la machine qui comporte une première structure de liaison (112) destinée au montage d'une tête d'outil. Ladite tête d'outil présente une deuxième structure de liaison (136). La tête d'outil (130) est fixée sur la tige de perçage (110) en intercalant un ensemble adaptateur (150) comportant plusieurs parties, une première partie d'adaptateur (160) de l'ensemble adaptateur étant reliée à la tige de perçage (110), une deuxième partie d'adaptateur (170) de l'ensemble adaptateur étant reliée à la tête d'outil (130), et la première et la deuxième partie d'adaptateur étant reliées l'une à l'autre, après centrage et de manière solidaire en rotation, au moyen d'une interface d'adaptateur (200) présentant une première et une deuxième structure d'interface qui se correspondent. De préférence, l'interface d'adaptateur est réalisée sous forme d'une liaison axiale par emboîtement.
PCT/EP2013/064488 2012-07-16 2013-07-09 Procédé et composants destinés à fabriquer un ensemble outil pour une machine de perçage de trous profonds WO2014012821A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP13734789.4A EP2872276A1 (fr) 2012-07-16 2013-07-09 Procédé et composants destinés à fabriquer un ensemble outil pour une machine de perçage de trous profonds

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102012212438.1A DE102012212438A1 (de) 2012-07-16 2012-07-16 Verfahren und Komponenten zum Herstellen einer Werkzeugeinheit für eine Tiefbohrmaschine
DE102012212438.1 2012-07-16

Publications (1)

Publication Number Publication Date
WO2014012821A1 true WO2014012821A1 (fr) 2014-01-23

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PCT/EP2013/064488 WO2014012821A1 (fr) 2012-07-16 2013-07-09 Procédé et composants destinés à fabriquer un ensemble outil pour une machine de perçage de trous profonds

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Country Link
EP (1) EP2872276A1 (fr)
DE (1) DE102012212438A1 (fr)
WO (1) WO2014012821A1 (fr)

Cited By (3)

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Publication number Priority date Publication date Assignee Title
WO2014183871A1 (fr) * 2013-05-17 2014-11-20 Ecoroll Ag Werkzeugtechnik Machine-outil d'usinage par enlèvement de copeaux, jeu d'outils et procédé pour fabriquer un cylindre ayant un alésage borgne et/ou un alésage à gradin
CN104400060A (zh) * 2014-10-27 2015-03-11 苏州信能精密机械有限公司 复合深孔机床
CN117817014A (zh) * 2024-03-05 2024-04-05 潍柴重机股份有限公司 喷吸钻及深直孔加工方法

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DE102010018959A1 (de) 2010-04-23 2011-10-27 Tbt Tiefbohrtechnik Gmbh + Co Bohrkopf für ein Tiefbohrwerkzeug zum BTA-Tiefbohren und Tiefbohrwerkzeug
WO2011142370A1 (fr) * 2010-05-10 2011-11-17 株式会社アヤボ Tête de forage profond et patin de guidage associé

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DE29702409U1 (de) * 1997-02-12 1998-03-12 Niles Simmons Industrieanlagen Einrichtung für das Tieflochbohren auf einem CNC-Dreh- und Fräsbearbeitungszenttrum
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JP3261584B1 (ja) * 2000-09-01 2002-03-04 ホーコス株式会社 工作機械の主軸装置
DE202010004788U1 (de) * 2010-01-13 2010-08-12 Auerbach Maschinenfabrik Gmbh Adaptereinrichtung für Tieflochbohrer sowie Fräsbearbeitungszentrum zur Komplettbearbeitung von Werkstücken mit einer solchen Adaptereinrichtung

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US2856157A (en) * 1955-09-19 1958-10-14 New England Carbide Tool Compa Masonry drills
DE20024021U1 (de) * 1999-07-09 2010-03-11 Horkos Corp., Fukuyama Spindelvorrichtung und Werkzeughalter einer Werkzeugmaschine
DE102010018959A1 (de) 2010-04-23 2011-10-27 Tbt Tiefbohrtechnik Gmbh + Co Bohrkopf für ein Tiefbohrwerkzeug zum BTA-Tiefbohren und Tiefbohrwerkzeug
WO2011142370A1 (fr) * 2010-05-10 2011-11-17 株式会社アヤボ Tête de forage profond et patin de guidage associé
EP2570214A1 (fr) * 2010-05-10 2013-03-20 Ayabo Corporation Tête de forage profond et patin de guidage associé

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014183871A1 (fr) * 2013-05-17 2014-11-20 Ecoroll Ag Werkzeugtechnik Machine-outil d'usinage par enlèvement de copeaux, jeu d'outils et procédé pour fabriquer un cylindre ayant un alésage borgne et/ou un alésage à gradin
CN104400060A (zh) * 2014-10-27 2015-03-11 苏州信能精密机械有限公司 复合深孔机床
CN117817014A (zh) * 2024-03-05 2024-04-05 潍柴重机股份有限公司 喷吸钻及深直孔加工方法
CN117817014B (zh) * 2024-03-05 2024-05-14 潍柴重机股份有限公司 喷吸钻及深直孔加工方法

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EP2872276A1 (fr) 2015-05-20
DE102012212438A1 (de) 2014-01-30

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