WO2016058899A1 - Mandrin de serrage pour accoupler un adaptateur d'outil à une broche de moteur d'une machine-outil - Google Patents

Mandrin de serrage pour accoupler un adaptateur d'outil à une broche de moteur d'une machine-outil Download PDF

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Publication number
WO2016058899A1
WO2016058899A1 PCT/EP2015/073256 EP2015073256W WO2016058899A1 WO 2016058899 A1 WO2016058899 A1 WO 2016058899A1 EP 2015073256 W EP2015073256 W EP 2015073256W WO 2016058899 A1 WO2016058899 A1 WO 2016058899A1
Authority
WO
WIPO (PCT)
Prior art keywords
clamping
threaded
pivot pin
drive element
jaw
Prior art date
Application number
PCT/EP2015/073256
Other languages
German (de)
English (en)
Inventor
Gilbert Kleiner
Original Assignee
Gühring KG
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 Gühring KG filed Critical Gühring KG
Publication of WO2016058899A1 publication Critical patent/WO2016058899A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B29/00—Holders for non-rotary cutting tools; Boring bars or boring heads; Accessories for tool holders
    • B23B29/04—Tool holders for a single cutting tool
    • B23B29/046—Tool holders for a single cutting tool with an intermediary toolholder
    • 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
    • B23B31/10—Chucks characterised by the retaining or gripping devices or their immediate operating means
    • B23B31/107—Retention by laterally-acting detents, e.g. pins, screws, wedges; Retention by loose elements, e.g. balls
    • B23B31/1075—Retention by screws
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q11/00—Accessories fitted to machine tools for keeping tools or parts of the machine in good working condition or for cooling work; Safety devices specially combined with or arranged in, or specially adapted for use in connection with, machine tools
    • B23Q11/10—Arrangements for cooling or lubricating tools or work
    • B23Q11/1015—Arrangements for cooling or lubricating tools or work by supplying a cutting liquid through the spindle
    • B23Q11/1023—Tool holders, or tools in general specially adapted for receiving the cutting liquid from the spindle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q3/00—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine
    • B23Q3/12—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine for securing to a spindle in general
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2250/00—Compensating adverse effects during turning, boring or drilling
    • B23B2250/12—Cooling and lubrication

Definitions

  • Clamping cartridge for r Attaching a tool adapter to a power tool of a machine tool
  • the invention relates to a collet for coupling a tool adapter, in particular a HSK adapter to a motor spindle of a machine tool, for a supply of MQL lubricant (minimum quantity lubrication system) to a material-removing tool, in particular a rotating drilling, grinding, milling or Countersink, is suitable.
  • a tool adapter in particular a HSK adapter to a motor spindle of a machine tool
  • MQL lubricant minimum quantity lubrication system
  • Generic clamping cartridges are well known from the prior art, and serve as an interface between a machine spindle of a machine tool and a tool, in particular a turning, grinding, drilling or drilling tool. With the tool, which has geometrically defined cutting edges, chips can be removed from a workpiece, whereby the tool usually rotates.
  • a collet forms an adapter for interchangeable connection between a tool subject to wear and the machine tool.
  • the tool is usually anchored in a tool adapter, wherein the tool adapter is in many cases designed as a taper receptacle, in particular as a HSK adapter (hollow shaft cone), which can be accommodated and anchored in an inner taper section of the clamping cartridge.
  • HSK adapter hollow shaft cone
  • the hollow shaft cone can be clamped and fixed centrally in the clamping cartridge.
  • the clamping device serves to draw the tool adapter into the clamping cartridge and to fix it, whereby generally annular section plan surfaces of clamping jaws engage in a round groove section of the hollow shaft cone.
  • an adjusting unit is provided, which is designed to undertake the radial adjustment of the clamping jaws of the clamping cartridge.
  • a drive element is generally provided which allows a drive of the adjusting unit.
  • Known clamping cartridges have as drive element to a clamping screw, which have two opposing threaded portions, and cooperates with the adjustment of the two clamping jaws that using one of the two threaded portions a first jaw outwardly and by means of the second threaded portion causes a longitudinal sliding movement of a sliding bolt of the adjusting unit radially , through which the second jaw can be displaced outwards.
  • a sliding bolt of the adjusting unit for example, an Allen wrench can be used, which engages radially from the outside through an opening of the tool adapter on the drive element of the clamping device and can set this in rotation.
  • MQL minimum quantity lubrication
  • an air-oil mixture is used as a coolant and lubricant.
  • the oil is present in dispersed droplets which, in a kind of nebula, impinge on a cutting point of a tool on the cutting edge and the surrounding areas of the tool and wet and thereby cool and lubricate.
  • EP 1 6 60 262 B1 and EP 17 13 606 B1 discloses a collet known in which a lubricant tube longitudinally axially through the clamping cartridge is feasible, wherein the clamping cartridge comprises a clamping device with an adjusting unit, by means of the two clamping jaws are radially displaceable, wherein the adjusting unit is designed such that it allows a passage of the centrally mounted lubricant pipe.
  • an adjusting unit comprising a sliding bolt, wherein in the sliding bolt a slot or a remediessausANSung is provided through which the lubricant pipe extends, and the slot or the recess a first , Retracted and second, extended jaw functional position of the slide pin defined between a first, relaxed and second, tensioned position of the jaws.
  • a double-threaded cap nut or a double-threaded screw having two threaded portions, wherein the first threaded portion serves to displace a first clamping jaw and a second threaded portion serves to displace the sliding bolt longitudinally to the axis of the lubricant tube, wherein the lubricant pipe is guided through the slot of the sliding bolt.
  • the second jaw is firmly locked at the lower axial end of the sliding bolt and is displaced radially by the sliding movement of the sliding bolt.
  • a double-threaded drive element serves in each case to displace a first clamping jaw by means of a screwing movement and to displace a second clamping jaw by means of a sliding movement of the adjusting bolt.
  • the displacement movement is generated by a screw movement of the drive element with a threaded portion of the displacement bolt in the region of the first clamping jaw.
  • the object of the invention is therefore to propose a clamping cartridge with clamping device, which can ensure a faster and more effective clamping of a tool adapter on the collet, with an MQL lubrication can be used, and the disadvantages of the aforementioned prior art can be overcome.
  • a clamping cartridge for coupling a tool adapter to a motor spindle of a machine tool which comprises a main body with a longitudinal axial continuous Schmierstoffrohraus strictlyung for axially receiving a lubricant tube and a clamping device for radial bracing a tool adapter.
  • the clamping device comprises at least two clamping jaws, which can be moved radially to the longitudinal axis of the Schmierstoffrohrausappelung.
  • Each jaw includes a threaded adjustment section.
  • a common, rotatably activatable adjusting unit is in operative engagement with the Gewindeverstellabrough each jaw.
  • the clamping cartridge comprises at least two clamping jaws, which are displaceable by means of a clamping device radially outward into a tensioned and radially inwardly into a relaxed functional position.
  • a clamping device For displacing the clamping jaws, a clamping device is used, which is set up in such a way that, by means of an adjusting unit of the clamping device, a rotary movement on a threaded end Setting portion of each jaw is vorrisebar, so that the clamping jaw is at least partially displaced in its displacement position by a screw thread engagement.
  • the clamping cartridge differs from the clamping cartridges known from the prior art at least in that both clamping jaws are not or not exclusively displaceable by a sliding movement, but by a screwing movement.
  • the radial adjustment movement at least one clamping jaw can be effected by a combined screwing and pushing movement of the adjusting unit. It is quite conceivable that for the radial adjustment of the clamping jaws not only a screwing movement alone, but a combined screwing and pushing movement of the adjusting unit can be performed from a first, opened functional position to a second, taut functional position. This inevitably results in the technical feature that the adjusting unit is designed to be displaceable radially to the axis of the lubricant tube. This results in the advantage that the forces of the two clamping jaws can be distributed uniformly, since a pressing of a first clamping jaw leads to a pushing movement in order to effect a uniform pressing of the second clamping jaw. This distributes the mechanical clamping forces evenly across the two clamping jaws and prevents one-sided distortion.
  • the adjusting unit may comprise a pivot pin which has a guide channel for guiding the lubricant tube and two Has axially end-side threaded portions, wherein the first threaded portion of the pivot pin is at least indirectly in operative engagement with a Gewindeverstellabrough the first jaw.
  • the second end-side threaded portion of the pivot pin is in operative engagement with the Gewindeverstellabrough the second clamping jaw.
  • the lubricant tube extends through the tortuous or curved guide channel of the pivot pin, so that a thrust movement of the pivot pin causes a rotational movement of the pivot pin by sliding an inner surface of the guide channel along an outer shell portion of the lubricant tube, whereby the clamping jaw can be moved radially by a screw engagement.
  • the adjustment unit comprises a pivot pin which has a complex guided guide channel formed, through which the lubricant pipe is guided.
  • the pivot pin may have two end-side threaded portions, which engages in the Gewindeverstellabroughe of the two clamping jaws, so that the pivot pin acts as a drive element.
  • the guide hole is configured such that a thrust movement of the pivot pin radially for aligning the lubricant tube from a first operative position to a second operative position results in rotation of the pivot pin, as an inner surface of the pilot hole is guided along an outer circumferential surface of the lubricant tube, and by the complex design of the Guide channels a rotational movement is effected.
  • the guide channel is designed, so to speak, as a wormhole, wherein its channel axis, which varies along the axis of rotation of the pivot pin, causes a rotation of the pivot pin in the case of a radial displacement relative to the axis of the lubricant tube.
  • the guide channel may be formed as a spiral portion hole around the axis of the pivot pin or as a slant portion hole along the axis of the pivot pin.
  • a combined longitudinal thrust and rotational movement of the pivot pin is effected, by which at least the second clamping jaw is displaceable by a combined screw and push movement.
  • the lubricant tube serves as a guide element of the pivot pin for generating the Rotary movement and is actively involved in transferring the first to the second functional position in the bracing process.
  • the adjusting unit may comprise a drive element with two threaded portions, wherein the first threaded portion of the drive element is in operative engagement with the Gewindeverstellab steel the first jaw, and the second threaded portion of the drive element is in operative engagement with the first threaded portion of the pivot pin.
  • a drive element with two threaded portions is provided between the first clamping jaw and the pivot pin, which acts as a transmission conversion, so to speak, and for actuating the drive movement, the first clamping jaw exerts a screwing movement and further causes a pushing movement of the pivot pin, wherein the leadership of Pivoting bolt causes rotation of the pivot pin along the outer surface of the lubricant tube, so that the second end-side threaded portion of the pivot pin generates a combined thrust and screwing movement of the second clamping jaw.
  • the guide channel of the pivot pin can define an axis of the lubricant tube extending at right angles to the axis of the pivot pin, which depends on an axial functional position of the pivot pin to the lubricant tube in a rotation angle between 2 ° to 45 °, preferably 5 ° to 30 °, in particular 12 ° to 20 °, to the pivot pin axis between a lower and an upper axial functional position of the pivot pin relative to the lubricant pipe is variable.
  • the pivot pin rotates by an axial thrust movement between the lower and upper axial functional position by this angle of rotation.
  • a Defined embodiment of the guide channel in which a rotation of the pivot pin between the lower and upper functional position is achieved by a rotation angle of a minimum of 2 ° to a maximum of 45 °.
  • This angle of rotation corresponds to the helical angle of the second jaw, and around this screw the second jaw is adjusted by the screwing.
  • the second jaw is displaced by an axial displacement path perpendicular to the axis of the lubricant tube and further displaced by a screwing by a maximum of 45 °, while the first jaw is displaceable by a screwing example, a drive element to this or a further travel.
  • the drive element may be a cap nut or a screw with double thread, wherein a first, preferably radially enlarged threaded portion engages in the Gewindeverstellab steel the first clamping jaw and a second, preferably radially reduced threaded portion in the first threaded portion of the pivot pin engages, wherein preferably the first and the second threaded portion have the same slope.
  • the drive element is designed as a cap nut or screw with double thread, thus enabling a high displacement and provides a threaded gear.
  • first and second clamping jaws may be identical, and the design of the drive element and the guide channel define a maximum Verspannweg the two jaws.
  • the first threaded portion of the pivot bolt zens be radially reduced compared to the second threaded portion of the pivot pin, and preferably the first threaded portion of the drive element have the same diameter as the second threaded portion of the pivot pin. In this case too, equal part formation of the two clamping jaws is made possible so that the assembly of the clamping device is facilitated and low production costs for a large number of identical parts can be achieved.
  • the adjusting unit may comprise at least one, in particular two or four threaded spindles, which extends from the threaded adjustment section of the first clamping jaw to the threaded adjusting section of the second clamping jaw, wherein the lubricant tube can be guided past the threaded spindle.
  • the threaded spindle can be driven to rotate at least on a clamping jaw.
  • the clamping device connects the two clamping jaws by means of at least one, in particular two or four threaded spindles.
  • the threaded spindle can be dimensioned radially small compared to the diameter of the lubricant pipe.
  • the threaded spindle is eccentrically guided around the lubricant tube, and connects the threaded portions of the first and second clamping jaw.
  • a transmission mechanism is provided at least in or on a clamping jaw, by means of which the threaded spindle can be driven.
  • the threaded spindle By rotating the threaded spindle, a radial displacement of the jaws between a first and a second clamping position is achieved.
  • the threaded spindle preferably has counter-cut threaded sections at their end regions.
  • the clamping movement is effected by a screwing movement, whereby a sliding displacement movement of the two clamping jaws is made possible in order to exert a uniform pressing pressure and to prevent a one-sided tension.
  • the drive element may be coupled to the threaded spindle by a gear mechanism, wherein the drive element is designed as a drive gear, preferably as a bevel gear and at least an output gear, preferably a bevel gear is arranged at one axial end of the threaded spindles.
  • a drive element is designed as a gear, for example as a bevel gear or as a peripheral gear, and the threaded spindle has at least at its upper axial end another gear, by the rotational movement of the drive gear rotational movement of the threaded spindle effected by the output gear are.
  • the gear mechanism achieves an implementation of the drive speed in an output speed which is significantly higher than the drive speed, so that a high travel speed and a force conversion for generating a high clamping pressure can be achieved by the drive gear.
  • two different clamping jaws namely a clamping jaw with gear mechanism and a second clamping jaw without gear mechanism, are used for a clamping device.
  • a clamping jaw with gear mechanism and a second clamping jaw without gear mechanism
  • a bracing of each of the two jaws can be made.
  • the number of identical parts can be increased and the assembly of the clamping device can be facilitated.
  • the adjusting unit has at least one drive element which can be operatively connected to a rotatably mounted lubricant tube or a rotatably mounted sleeve around the lubricant tube, wherein the drive element by means of at least one threaded spindle o - Which is connected by means of at least one push rod with at least one Gewindeverstellab steel the clamping jaw to cause a radial movability of the clamping jaws relative to the longitudinal axis of the lubricant tube.
  • the lubricant tube directly drives a drive element, wherein the lubricant tube is rotatably mounted, and by a rotation of the lubricant tube, which is in operative connection with the drive element, drives the drive element such that the drive element by means of a threaded spindle a screwing or by means of a Push rod exerts a pushing movement on the two jaws, and thus spans the jaws from a first, radially retracted into a second, radially extended clamping position.
  • the mechanical clamping force is transmitted through the lubricant pipe, in turn, a transmission mechanism is used to cause a rotational movement of the lubricant tube in a radial movement position of the clamping jaws relative to the longitudinal axis of the lubricant tube.
  • the rotational movement of the lubricant pipe can be done manually or by motor.
  • the lubricant pipe can be made from a tool adapter side or a motor spindle side of the machine tool.
  • the drive element of the threaded spindle a helical toothing portion, a bevel gear portion o- include a worm gear portion which is in operative engagement with a Spindelgewinde-, a conical or Schneckenveriereungsabrough of the lubricant tube.
  • the threaded spindle can have two axial threaded end sections, which are in operative engagement with the threaded adjustment section of the clamping jaws.
  • a drive of the threaded spindles can be achieved by a rotational movement of the lubricant tube.
  • the lubricant tube has a spindle thread, conical or worm-toothed section which is in operative engagement with a helical, beveled or worm-toothed section of the threaded spindle.
  • the two jaws can be mechanically relatively simple and designed as a common part, and have only threaded adjustment sections, which can be dispensed with a gear mechanism within the jaw.
  • the drive element may be provided at least as a Mutterverstellelement, wherein the Mutterverstellelement is longitudinally axially adjustable relative to the lubricant tube on a spindle thread portion of the lubricant tube, and the Mutterverstellelement is connected by means of at least one push rod with a Gewindeverstellab steel the clamping jaw.
  • a non-rotatably mounted, but thrust-bearing nut adjustment along the longitudinal axis of the lubricant tube by rotation of the lubricant tube is movable.
  • a main body of the collet can define a corresponding guide channel of the Mutterverstellelements. Due to the longitudinal axial movability of the Mutterverstellelements a lifting movement of the clamping jaw is effected by a push rod connection to at least one of the two clamping jaws, wherein the push rod can engage in a Gewindeverstellab steel the clamping jaw.
  • two mother drive elements are provided on the lubricant tube at two opposing threaded portions, so that during an adjustment, the two nut elements move towards or away from each other, and by a cross slide linkage, the two jaws can be connected to both parent drive elements to effect a uniform radial retraction and extension of the jaws.
  • the clamping jaws are formed in the same way, and can be produced identically, so that a high number of identical parts achieved, and an assembly of a clamping device is simplified. This results in mass production, the advantages of providing identical clamping jaws having mechanically similar property, so that a durable, robust and inexpensive collet can be produced.
  • the two clamping jaws may have a rounded or angled contour in the direction of the longitudinal axis of a tool adapter to be coupled. Due to an angled or rounded contour, as already proposed in EP 1 713 606 B1, a higher effective surface can provide greater mechanical stability and less stress on the clamping device. be achieved, so that the longevity, efficiency and clamping quality of the clamping cartridge can be significantly improved.
  • Fig. 1 in a side and top view a collet of a first embodiment of the invention
  • FIG. 2 several illustrations of a clamping cartridge of the prior art
  • Fig. 3 is a longitudinal sectional view of another embodiment of a collet according to the invention.
  • Fig. 4 shows in detailed partial views an embodiment of a clamping cartridge with pivot pins according to the invention
  • FIG. 5 shows the embodiment of FIG. 4 in a first relaxed functional position
  • FIG. 6 shows in perspective an embodiment of FIG. 4 in a second tensioned functional position
  • Fig. 7 shows an embodiment according to FIG. 4 in a first, relaxed functional position
  • FIG. 8 shows an embodiment according to FIG. 4 in an intermediate function position
  • Fig. 9 shows a representation of an embodiment according to FIG. 4 in a second, tensioned functional position
  • FIG. 1 0 another embodiment of the invention with an adjusting device with threaded spindles
  • Fig. 1 1 shows in several illustrations an alternative embodiment of the invention with a rotatable lubricant tube and nut drive elements
  • Fig. 1 another embodiment with rotatable lubricant tube
  • Threaded drive pin In the figures, the same or similar components are numbered with the same reference numerals.
  • the clamping cartridge 10 comprises a main body 14 and a clamping device 20.
  • the main body 14 has a spindle-side connecting region 36 on a machine side 68.
  • the clamping device 20 is arranged, which extends along an axis 56.
  • the axis 56 is arranged at right angles to the axis 34 of the lubricant tube 18.
  • two connecting pins 38 are arranged for rotatably receiving a tool adapter.
  • the clamping device 20 has two clamping jaws 22, a first clamping jaw 24 and a second clamping jaw 26.
  • the two clamping jaws 24, 26 can be moved radially to the axis 34 by means of an adjusting unit 30, wherein the adjusting unit 30 comprises a drive element 32 in the form of a Allen-operated screw, by means of which the two clamping jaws 24 and 26 from a first, relaxed functional position to a second, strained functional position are displaced.
  • the outer contour of a clamping jaw 22 has a rounded contour 64 in the direction of the tool side 66 in order to define an elevated clamping jaw surface in which the drive element 32 is embedded.
  • a collet 200 of the state of the tech- nik shown with a tensioning device 204 is shown with a tensioning device 204.
  • the collet 200 has a base body 202, as shown in Figs.
  • the main body 202 has a spindle-side connecting region 36, on which two bayonet pins 228 are arranged for locking in the tool spindle.
  • a recess 224 for receiving the tensioning device 204 shown in Figures 2a and 2b is inserted.
  • two clamping jaw seats 106 are inserted, in which the clamping jaws 220, 222 can be retracted to a first relaxed operating position.
  • the recess 224 defines an axis 226 of the shifting bolt 206 shown in FIGS. 2a and 2b.
  • the clamping device 204 shown in FIGS. 2 a and 2 b comprises a first clamping jaw 220 and a second clamping jaw 222.
  • the two clamping jaws 220, 222 can be fastened to pins 212, 214 of the sliding bolt 206.
  • the second jaw 222 is attached to a locking pin 212 by means of a locking pin 21 6.
  • a pin channel 218 is inserted in the locking pin 212 and a locking pin recess 230 in the second clamping jaw 222.
  • the locking pin 21 6 can be inserted through the locking pin recess 230 and the pin channel 218 in order to fasten the second clamping jaw 222 to the sliding pin 206.
  • the first jaw 220 can be secured by means of a double-threaded cap nut 208 as a drive element on the threaded pin 214.
  • the sliding bolt 206 has a frame opening 210, which defines such a large recess through which a lubricant pipe 18 along a Schmierrohrohrachse 34 is feasible, wherein the sliding pin 206 can be moved radially to the axis 34 from a first to a second functional position.
  • the first clamping jaw 220 is urged radially outwards, and pushed in the opposite direction by a counter-pressing movement of the displacement bolts 206, and thus the second clamping jaw 222 also outwardly through a Moved longitudinal movement.
  • the clamping jaw adjusting movement is effected solely by the thread rotation of the cap nut 208. Accordingly, only longitudinal thrust forces act on the second clamping jaw 222. relatively high number of rotations of the cap nut 208 are completed in order to achieve a significant clamping movement of the two clamping jaws 220, 222.
  • FIG. 3 shows in a longitudinal section through a collet 10 as the first exemplary embodiment 120 the basic structure of a clamping device according to the invention.
  • the clamping cartridge 120 has a base body 14, which defines on its machine side 68, a spindle-side connecting portion 36 with internal thread pot into which a threaded bolt of a machine spindle 12 is screwed.
  • an axially parallel lubricant tube 18 is integrated, whereby an air-oil mixture from the machine tool on the collet 10, a hollow shaft cone (not shown) (HSK) can be performed up to a mounted therein cutting tool.
  • a clamping device 20 for clamping the HSKs according to a first embodiment 130 is arranged.
  • the tensioning device 130 is arranged along a pivot pin axis 56 at right angles to the axis 34 of the lubricant tube 18.
  • the main body 14 receives two clamping jaws 22, a first clamping jaw 24 and a second clamping jaw 26, in opposing clamping jaw seats 106.
  • the clamping jaws 24, 26 can be displaced radially to the axis 34 from a first, relaxed to a second, tensioned functional position.
  • a pivot pin 40 is provided, which comprises a guide channel 42, through which the lubricant pipe 18 is guided.
  • the pivot pin 40 has a first threaded portion 44 on the side of the first clamping jaw 24 and a second threaded portion 46 in the region of the second clamping jaw 26.
  • the second clamping jaw 26 has a threaded adjustment section 28, in which the second threaded portion 46 of the pivot pin 40 is screwed.
  • a double-threaded screw 62 is provided as a drive element 32 of the adjusting unit 30 .
  • the double-threaded screw 62 has a first threaded portion 52 which is screwed into the threaded adjustment portion 28 of the first clamping jaw 24.
  • the second threaded portion 54 of the drive element 30 is screwed into the first threaded portion 44 of the pivot pin 40.
  • the double-threaded screw 62 can be unscrewed in the direction of the pivot pin 40, whereby the first clamping jaw 24 along the first threaded portion 52 of the drive member 32 unscrews and radially outward pushes.
  • a movement of the pivot pin 40 in the direction of the second jaw 26 is effected by a counter pressure. Due to a sliding friction of the guide channel 42 on a surface portion of the lubricant tube 18, the pivot pin 40 rotates, so that by an additional screwing the second threaded portion 46 of the pivot pin 40 unscrewing the Gewindeverstellabitess 28 of the second jaw 26 is effected.
  • a displacement of the two clamping jaws 24, 26 can be achieved by a combined screwing and sliding movement of the rotary bolt 40, whereby the two clamping jaws 22 are moved from a first to a second functional position with a relatively small number of screwing movements can.
  • FIGS. 4a to 4c show in detail a first embodiment 130 of a tensioning device 20.
  • the clamping device 20, 130 comprises two clamping jaws 22, a first clamping jaw 24 and a second clamping jaw 26.
  • the two clamping jaws 22 are constructed identically and each have a threaded through bore with a threaded adjusting section 28.
  • the two clamping jaws 22 are connected by means of an adjusting unit 30, which comprises a pivot pin 40 and a drive element 32.
  • the drive member 32 is a double-threaded screw 62 having a first threaded portion 52 and a second threaded portion 54.
  • the first threaded section 52 can be screwed into the threaded adjustment section 28 of the first clamping jaw 24.
  • the second threaded portion 54 can be screwed into a first threaded portion 44 of the pivot pin 40.
  • the pivot pin 40 has, in addition to the first threaded portion 44, which is aligned in the direction of the first clamping jaw 24, a second threaded portion 46 which is aligned in the direction of the second clamping jaw 26.
  • the second threaded portion 46 of the pivot pin 40 has the same diameter as the first threaded portion 52 of the double-threaded screw 62.
  • the pivot pin 40 has a guide channel 42, through which a lubricant tube 18 is guided.
  • the guide channel 42 has a curved in axis of the pivot pin 40 course, and is similar to a wormhole or a spiral hole portion, wherein at different axial displacement positions of the pivot pin 40 perpendicular to the axial direction of the lubricant pipe 18 different Rotation angle of the pivot pin 40 are taken around its axis 56. This is achieved by a longitudinal displacement of the pivot pin 40, a sliding guide an inner surface 48 of the guide channel 42 on an outer shell portion 50 of the lubricant tube 18 occurs, which triggers a rotational movement of the pivot pin 40 in a pushing movement.
  • the tensioning device 130 can be inserted into the tensioning cartridge 10 of a first embodiment 120 shown in FIGS. 4b and 4c.
  • the clamping cartridge 10, 120 has a base body 14, and has on its machine side 68 a spindle-side connecting portion 36, on which two bayonet pins 38 are arranged for anchoring in a machine spindle.
  • a lubricant can penetrate the base body 14 without bending and bending.
  • a recess 104 for receiving the clamping device 130 is provided in the direction of the tool side 66 of the clamping cartridge 120.
  • the two clamping jaws 22 are received in the clamping jaw seats 106 of the base body 14 of the clamping cartridge 120.
  • the pivot pin 40 extends along an axis 56 which is oriented perpendicular to the axis 34 of the lubricant tube.
  • FIGS. 5a and 5b show perspectively the embodiment 120 of a collet 10 shown in FIGS. 3 and 4 in a first, relaxed functional position.
  • the pivot pin 40 is in a position in which the lubricant pipe 18 is arranged in a lower region of the guide channel 42.
  • the drive element 32 is completely screwed into the pivot pin 40 and the two jaws 22 are fully enclosed in the seat 106 of the body 14.
  • the embodiment 120 are shown in a second, tensioned operating position in the same way.
  • the lubricant tube 18 can now be found in an upper region of the guide channel 42 and the drive member 32 is unscrewed from the pivot pin 40 in many areas, so that the two clamping jaws 22 are displaced radially outward.
  • FIGS. 7a and 7b show in a perspective view and FIGS. 8a and 8b and finally 9a and 9b a first relaxed functional position in FIG. 7a, an intermediate position between first and second functional position in FIGS. 8a and 8b , and a tensioned second functional position in Fig. 9, in which the two jaws 22 are completely displaced outwards.
  • an HSK not shown, is clamped in the collet, and accurately mounted centrically, and high torque forces can be transmitted between the machine spindle and HSK.
  • the clamping device 132 consists of two clamping jaws 22, which, as shown in Fig. 10a, two threaded spindles 72 and, as shown in Fig. 10b, four threaded spindles 72 are connected.
  • the threaded spindles 72 have two opposite threaded end portions 94, which are screwed into Gewindeverstellab steele 28 of the clamping jaws 22.
  • the opposite threaded end portions 94 of the threaded spindles 72 can be screwed into the clamping jaws 22 so far that they can define a first and a second functional position.
  • the threaded spindles 72 are arranged such that they are guided around a central lubricant pipe 18.
  • a gear mechanism 76 is provided, which, as shown in FIG. 10a, is designed by a drive gear 78, for example as a bevel gear, wherein the two threaded spindles 72 have output gear wheels 80 also in the form of bevel gears.
  • the gear mechanism 76 the number of revolutions of the threaded spindles 72 can be adjusted when driving the drive member 74 as a drive gear 78, which is usually higher than the number of revolutions of the drive gear 78.
  • a high number of revolutions of the threaded spindles 72 can be achieved by a small number of rotations of the drive gear 78.
  • the first clamping jaw 24 which differentiates the gearbox
  • the first clamping jaw 24 may be identical to the second jaw 26 executed. This has the advantage that drive elements 74 are accessible from both clamping jaws, and thus an adjustment of the clamping device 132 is made possible from both sides.
  • FIGS. 10c and 10d respective basic bodies 14 of clamping cartridges 10 of a second exemplary embodiment 122 are shown, which in their basic structure correspond to the preceding clamping cartridges 10.
  • the main body 14 have spindle channels 108 for inserting the threaded spindles 72.
  • a base body 14 of a clamping cartridge 122 is shown corresponding to FIG. 10a, which can accommodate a clamping device 132 with an adjusting unit 70, which comprises two threaded spindles 72.
  • FIG. 10 d shows a clamping cartridge 122 with a base body 14 which has four spindle channels 108, which can receive the four threaded spindles 72 of the adjusting unit 70 of the clamping device 132.
  • Seats 106 are provided for the clamping jaws 22 in the main body 14; a larger recess for the clamping device 20 can be dispensed with, so that a load-bearing basic body 14 can be provided.
  • FIGS. 1 1 c and 1 1 d a further alternative embodiment 134 of a clamping device 20 is shown, wherein in FIGS. 1 1 c and 1 1 d, the corresponding clamping cartridges 124 are shown.
  • a drive element is arranged within a clamping jaw 22
  • a drive element 96 is arranged on a rotatable lubricant tube 1 10 in this embodiment.
  • the lubricant tube 1 10 is freely rotatable about its axis 34 and has two opposing threaded portions 100.
  • the lubricant tube 1 10 can be rotated manually or by motor, for example, by a rotary kinematics of the machine spindle.
  • two nut drive elements 98 are provided as the drive element 96.
  • the nut drive elements 98 run within a running channel of the base body 14 of the clamping cartridge 124.
  • the two mother drive elements 98 move either towards or away from each other.
  • push rods 102 which extends from each nut drive element 98 to a clamping jaw 22, when closing the two Nut drive elements 98, the clamping jaws 22 urged radially outward.
  • the push rods 102 engage the clamping jaws 22 at Gewindeverstellab steelen formed as joints, a.
  • a radial displacement movement of the clamping jaws 22 between a first and a second functional position 58, 60 can be achieved by a radial displacement of the drive elements 96.
  • FIGS. 12a and 12b show a further exemplary embodiment 136 of a clamping device 20 of a collet 126.
  • the lubricant tube 110 is rotatable, wherein a helical or helical section 92 of the lubricant tube 110 is arranged in the region of the clamping jaws 22 ,
  • the two clamping jaws 24 and 26 are connected to each other via threaded spindles 86.
  • By turning the threaded spindles 86 engage their opposite threaded end 94 in the Gewindeverstellab bainitese 28 of the clamping jaws 22 a.
  • a worm or helical gear section 90 is provided at the level of the lubricant tube 110, which meshes with the toothed section 92 of the lubricant tube 11 and thereby drives the threaded spindles 86.
  • the two threaded spindles 86 are thus set in rotation, and the two clamping jaws 22 can be moved along the threaded end sections 94 and the threaded adjusting sections 28 between a first and a second functional position.
  • the invention achieves a clamping stroke shortening of a HSK clamping cartridge for a minimal quantity lubrication system by a rotary drive of both clamping jaws.
  • a rotary drive of both clamping jaws By providing an additional rotor drive of the thread on the opposite second jaw, an increase of the torque, a reduction of the mechanical load and a quick function adjustment is made possible.
  • a rotary push element as a pivot pin which utilizes a force support on the centrally passing lubricant tube to create a rotational movement, allows an adjustment kinematics, which makes the advantages of the invention accessible. LIST OF REFERENCE NUMBERS

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Details Of Gearings (AREA)

Abstract

L'invention concerne un mandrin de serrage (10, 120, 122, 124, 126) destinée à accoupler un adaptateur d'outil à une broche de moteur (12) d'une machine-outil. Le mandrin de serrage (10, 120, 122, 124, 126) comprend un corps de base (14) qui comporte un évidement de tube de lubrifiant (16), qui s'étend de bout en bout dans une direction longitudinale axiale et qui est destiné à recevoir axialement un tube de lubrifiant (18), et un dispositif de serrage (20) destiné à serrer radialement un adaptateur d'outil. Selon l'invention, le dispositif de serrage (20) comprend au moins deux mâchoires de serrage (22) qui sont déplaçables radialement par rapport à l'axe longitudinal (34) de l'évidement de tube de lubrifiant (16), chaque mâchoire de serrage (22) comportant une partie de réglage filetée (28). Une unité de réglage commune (30, 70, 82), activable en rotation, est en engagement fonctionnel avec la partie de réglage filetée (28) de chaque mâchoire de serrage (22) de sorte qu'un mouvement de rotation d'un élément d'entraînement (32, 74, 96) de l'unité de réglage (30, 70, 82) permet d'effectuer un mouvement de déplacement radial de chaque mâchoire de serrage (22) par au moins un engrènement de l'unité de réglage (30, 70, 82) sur la partie de réglage filetée (28) de chaque mâchoire de serrage (22).
PCT/EP2015/073256 2014-10-13 2015-10-08 Mandrin de serrage pour accoupler un adaptateur d'outil à une broche de moteur d'une machine-outil WO2016058899A1 (fr)

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DE102014114779.0 2014-10-13
DE102014114779.0A DE102014114779B3 (de) 2014-10-13 2014-10-13 Spannpatrone zur Ankopplung eines Werkzeugadapters an eine Motorspindel einer Werkzeugmaschine

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Cited By (3)

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Publication number Priority date Publication date Assignee Title
US20160195119A1 (en) * 2015-01-07 2016-07-07 Kennametal Inc. Cam bolts and tool coupling systems employing the same
CN110001258A (zh) * 2019-04-02 2019-07-12 深圳市顺源精密机械有限公司 一种iso刀柄双面贴合工艺
WO2023240442A1 (fr) * 2022-06-14 2023-12-21 桐乡市倍特科技有限公司 Machine-outil à commande numérique pour le refroidissement d'une vis entraînant un établi à déplacer

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DE102019100898B4 (de) * 2019-01-15 2022-08-11 Berg & Co. Gmbh Spannvorrichtung für ein hülsenförmiges Werkstück, Handhabungsvorrichtung, eine solche Spannvorrichtung umfassend und Bearbeitungsanordnung
CN112462101A (zh) * 2020-12-16 2021-03-09 国网江苏省电力有限公司检修分公司 主变低压侧管母直流电阻测量线夹夹具及其参数计算方法

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DE102007024552A1 (de) * 2007-05-24 2008-11-27 Gühring Ohg Spannvorrichtung
DE102011005052A1 (de) * 2011-03-03 2012-09-06 Gühring Ohg Spannsystem zur lösbaren Verbindung zweier vorzugsweise rotationssymetrischer Teile
EP1713606B1 (fr) * 2004-02-12 2014-04-02 Gühring, Jörg, Dr. Element de serrage pour porte-outils

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DE10338610B4 (de) * 2003-08-22 2015-05-07 MAPAL Fabrik für Präzisionswerkzeuge Dr. Kress KG Schnittstelle

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EP1713606B1 (fr) * 2004-02-12 2014-04-02 Gühring, Jörg, Dr. Element de serrage pour porte-outils
DE102007024552A1 (de) * 2007-05-24 2008-11-27 Gühring Ohg Spannvorrichtung
DE102011005052A1 (de) * 2011-03-03 2012-09-06 Gühring Ohg Spannsystem zur lösbaren Verbindung zweier vorzugsweise rotationssymetrischer Teile

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20160195119A1 (en) * 2015-01-07 2016-07-07 Kennametal Inc. Cam bolts and tool coupling systems employing the same
US10118231B2 (en) * 2015-01-07 2018-11-06 Kennametal Inc. Cam bolts and tool coupling systems employing the same
CN110001258A (zh) * 2019-04-02 2019-07-12 深圳市顺源精密机械有限公司 一种iso刀柄双面贴合工艺
WO2023240442A1 (fr) * 2022-06-14 2023-12-21 桐乡市倍特科技有限公司 Machine-outil à commande numérique pour le refroidissement d'une vis entraînant un établi à déplacer

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