WO2023041352A1 - Vorrichtung für die verzahnbearbeitung, werkzeugkopf und verzahnmaschine - Google Patents
Vorrichtung für die verzahnbearbeitung, werkzeugkopf und verzahnmaschine Download PDFInfo
- Publication number
- WO2023041352A1 WO2023041352A1 PCT/EP2022/074477 EP2022074477W WO2023041352A1 WO 2023041352 A1 WO2023041352 A1 WO 2023041352A1 EP 2022074477 W EP2022074477 W EP 2022074477W WO 2023041352 A1 WO2023041352 A1 WO 2023041352A1
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- WO
- WIPO (PCT)
- Prior art keywords
- tool
- axis
- spindle
- clamping
- mandrel
- Prior art date
Links
- 238000003754 machining Methods 0.000 title claims abstract description 95
- 238000000227 grinding Methods 0.000 claims description 26
- 238000005096 rolling process Methods 0.000 claims description 10
- 238000012545 processing Methods 0.000 claims description 7
- 230000008878 coupling Effects 0.000 claims description 4
- 238000010168 coupling process Methods 0.000 claims description 4
- 238000005859 coupling reaction Methods 0.000 claims description 4
- 230000008859 change Effects 0.000 description 4
- 238000013461 design Methods 0.000 description 4
- 238000003801 milling Methods 0.000 description 4
- 238000005259 measurement Methods 0.000 description 3
- 238000005498 polishing Methods 0.000 description 3
- 238000011161 development Methods 0.000 description 2
- 238000007667 floating Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000011089 mechanical engineering Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23F—MAKING GEARS OR TOOTHED RACKS
- B23F23/00—Accessories or equipment combined with or arranged in, or specially designed to form part of, gear-cutting machines
- B23F23/12—Other devices, e.g. tool holders; Checking devices for controlling workpieces in machines for manufacturing gear teeth
- B23F23/1237—Tool holders
- B23F23/1275—Grinding or honing worm holders
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23F—MAKING GEARS OR TOOTHED RACKS
- B23F21/00—Tools specially adapted for use in machines for manufacturing gear teeth
- B23F21/02—Grinding discs; Grinding worms
- B23F21/026—Grinding worms
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23F—MAKING GEARS OR TOOTHED RACKS
- B23F23/00—Accessories or equipment combined with or arranged in, or specially designed to form part of, gear-cutting machines
- B23F23/12—Other devices, e.g. tool holders; Checking devices for controlling workpieces in machines for manufacturing gear teeth
- B23F23/1237—Tool holders
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23F—MAKING GEARS OR TOOTHED RACKS
- B23F5/00—Making straight gear teeth involving moving a tool relatively to a workpiece with a rolling-off or an enveloping motion with respect to the gear teeth to be made
- B23F5/02—Making straight gear teeth involving moving a tool relatively to a workpiece with a rolling-off or an enveloping motion with respect to the gear teeth to be made by grinding
- B23F5/04—Making straight gear teeth involving moving a tool relatively to a workpiece with a rolling-off or an enveloping motion with respect to the gear teeth to be made by grinding the tool being a grinding worm
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23F—MAKING GEARS OR TOOTHED RACKS
- B23F5/00—Making straight gear teeth involving moving a tool relatively to a workpiece with a rolling-off or an enveloping motion with respect to the gear teeth to be made
- B23F5/20—Making straight gear teeth involving moving a tool relatively to a workpiece with a rolling-off or an enveloping motion with respect to the gear teeth to be made by milling
- B23F5/22—Making straight gear teeth involving moving a tool relatively to a workpiece with a rolling-off or an enveloping motion with respect to the gear teeth to be made by milling the tool being a hob for making spur gears
-
- 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
- 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
- B23Q5/00—Driving or feeding mechanisms; Control arrangements therefor
- B23Q5/02—Driving main working members
- B23Q5/04—Driving main working members rotary shafts, e.g. working-spindles
-
- 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
- B23B31/30—Chucks characterised by features relating primarily to remote control of the gripping means using fluid-pressure means in the chuck
- B23B31/305—Chucks characterised by features relating primarily to remote control of the gripping means using fluid-pressure means in the chuck the gripping means is a deformable sleeve
-
- 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
- B23B31/40—Expansion mandrels
Definitions
- the present invention relates to a device for machining a gear using a rotating machining tool, a tool head equipped therewith and a gear cutting machine equipped therewith.
- a toothed workpiece is processed in generating contact with a rotating grinding worm.
- the grinding worm is mounted on a tool head which has a work spindle. At one end, the grinding worm is connected to the work spindle in order to be driven in rotation by it.
- a counter bearing can be provided at the other end of the grinding worm.
- a counter bearing is often dispensed with. This allows the grinding worm to be replaced more easily and quickly.
- the work spindle or the counter bearing can then collide with the workpiece. It is also possible that the tool interface of such a large work spindle is not suitable for connection to a small machining tool, or that the work spindle does not reach the desired speed.
- EP2216118A2 discloses a device having a tool holder for a hobbing tool and a fastening means for receiving in a milling head of a universal milling machine with at least five axes.
- a gear transmits a rotary movement of a work spindle of the machine tool to the generating tool in order to drive the generating tool.
- the device has some disadvantages.
- the rolling engagement during rolling machining requires a very precise synchronization of the tool rotation with the workpiece rotation. This requirement is difficult to meet with a gearbox.
- the axis of rotation of the rolling tool is perpendicular to the axis of rotation of the milling head. This arrangement is therefore not suitable for use in conventional gear cutting machines.
- a device for machining gearing using a rotating machining tool that has a first end and a second end is therefore specified.
- the device has: a motor spindle with a drive motor and a motor spindle shaft that can be driven by the drive motor, the motor spindle being designed to generate a rotation of the motor spindle shaft about a tool axis, the motor spindle shaft being designed to be connected to the machining tool at its first end in order to drive the machining tool with the drive motor to rotate about the tool axis, a fastening structure for detachably attaching the device to a work spindle of a tool head, the work spindle being designed to generate a rotation of a work spindle shaft about a work spindle axis in order to rotate a tool to drive a rotation about the work spindle axis; and wherein the motor spindle is connected to the mounting structure, and wherein the mounting structure is configured such that the tool axis is parallel to the work spindle axis when the
- a device that is suitable for being connected to a work spindle of a tool head and that has a driven shaft that is separate from the work spindle for driving a machining tool is also referred to below as an "additional spindle unit". Since the attachment spindle unit according to the invention is designed to be connected to the work spindle of the tool head in such a way that the tool axis runs parallel to the work spindle axis, essentially the same machine kinematics can be used when machining the workpiece that would also be used if the machining tool were clamped directly on the work spindle were. By providing an independent motor spindle on the attachment spindle unit, the machining tool can be driven at the appropriate speed regardless of the limitations of the work spindle.
- the machining tool is a hobbing tool
- the presence of the motor spindle enables it a more precise synchronization between the rotational movements of the machining tool and the workpiece than if the drive were to take place from the work spindle via a gear or a toothed belt drive.
- the fastening structure has an at least partially ring-shaped (i.e. partially ring-shaped or completely ring-shaped) area which is designed to support the work spindle (in particular a housing area of the work spindle, wherein this housing area can be arranged adjacent to the tool interface of the work spindle), wherein the at least partially ring-shaped area defines a ring axis and this ring axis runs parallel to the tool axis.
- the attachment spindle unit is to be used for generating, it is advantageous if the attachment spindle unit also has a rotation measuring system for detecting a rotational position (rotational angle position) of the spindle shaft about the tool axis.
- the rotational position of the spindle shaft recorded in this way can be transmitted from the rotation measuring system to a machine controller, which establishes the necessary synchronization between the rotational movements of the machining tool and the workpiece to maintain the rolling coupling.
- the attachment spindle unit can be equipped with a balancing system, e.g. a one- or two-level balancing system. However, the attachment spindle can also be operated without a balancing system.
- a balancing system e.g. a one- or two-level balancing system.
- the attachment spindle can also be operated without a balancing system.
- the attachment spindle unit can also have a counter bearing which is designed to rotatably support the machining tool at its second end.
- the attachment spindle unit is particularly suitable for machining tools that are very long in relation to their diameter exhibit.
- the counter bearing has a hollow shaft that can be rotated about the tool axis
- the device has a mandrel that defines a longitudinal axis
- the mandrel has first and second clamping areas that are arranged at different positions along the longitudinal axis of the mandrel, and the mandrel can be inserted through the hollow shaft along the tool axis into a longitudinal bore of the machining tool, such that the first clamping area is able to form a clamping connection with the hollow shaft of the counter bearing
- the second clamping portion is capable of clamping with the machining tool to thereby support the machining tool on the anvil.
- the machining tool can be easily replaced by releasing the clamping connections and pulling the mandrel back out of the machining tool in the hollow shaft of the counter bearing, so that the machining tool can be easily removed.
- the use of a mandrel enables a particularly rigid connection between the machining tool and the counter bearing.
- the invention also provides, in a more general form, a device for machining gearing using a rotating machining tool that has a first end and a second end, which has: a motor spindle with a drive motor and a motor spindle shaft that can be driven by the drive motor, which is adapted to be connected to the machining tool at the first end thereof to drive the machining tool to rotate about a tool axis; a thrust bearing configured to rotatably support the rolling tool at the second end thereof, the thrust bearing having a hollow shaft extending around the tool axis is rotatable; and a mandrel that defines a longitudinal axis, wherein the mandrel has first and second clamping areas that are arranged at different positions along the longitudinal axis of the mandrel, and wherein the mandrel can be inserted through the hollow shaft along the tool axis
- This device can be designed as an actual tool head or, as described above, as an attachment spindle unit. If the device is designed as a tool head, the motor spindle mentioned is the work spindle of the tool head. It can then be mounted on a carrier together with the counter bearing. In particular, both the work spindle and the counter bearing can be rigidly mounted on the carrier.
- the carrier can in particular be designed as a shift carriage, which in turn is arranged to be displaceable on a base body.
- the base body can be designed as a swiveling body for swiveling attachment to a tool carrier of a gear cutting machine.
- the mandrel can be designed to create the clamping connection in at least one of the two clamping areas by means of a clamping force acting radially outwards.
- a non-positive, radial connection compensates for the length tolerances of all parts. If different processing tools are mounted, any differences in length between the mounting flanges of these processing tools are irrelevant with this system.
- a frictional connection that acts purely radially ensures the connection axially and radially and does not lead to any undesirable axial tension.
- the two clamping areas can have identical or different outside diameters.
- the outside diameter of the first clamping area for connection to the hollow shaft of the counter bearing can be larger than the outside diameter of the second clamping area for connection to the machining tool.
- the counter bearing can be driveless, or it can be part of a second motor spindle, with the help of which the machining tool can be driven on both sides.
- the mandrel acts as a hydraulic expansion mandrel in at least one of the two clamping areas.
- a design in at least one of the clamping areas as a hydraulic expansion mandrel enables a secure connection between the machining tool and the counter bearing in a particularly simple manner.
- the functional principle of a hydraulic expansion mandrel is known per se from the prior art.
- a hydraulic expansion mandrel has, in particular, at least one expansion bush, which radially outwardly delimits at least one clamping chamber and preferably a plurality of clamping chambers distributed in the longitudinal direction and/or circumferential direction.
- the clamping area in question preferably has two clamping points which are spaced apart axially and at which at least one clamping chamber is arranged in each case. In this way, optimal flexural rigidity can be achieved.
- the mandrel preferably acts as a hydraulic expansion mandrel in both clamping areas.
- one or more clamping chambers that can be pressurized are preferably present in each of the two clamping areas.
- the mandrel can also be designed as a mechanical mandrel. It is also possible to use a mandrel which is designed as a hydraulic expansion mandrel in the first clamping area, while it is designed as a mechanical mandrel in the second clamping area, or vice versa.
- the mandrel can have a clamping bushing in at least one of the two clamping areas, which can be radially expanded by mechanical action, similar to a hydraulic expansion mandrel.
- the mechanical mandrel it is also possible for the mechanical mandrel to be designed to produce a clamping connection in the relevant clamping area in a different way, for example by means of a clamping set known per se for a hollow shank taper connection. The clamping force generated in this way does not necessarily have to act radially outwards.
- the hydraulic expansion mandrel can be actuated mechanically or hydraulically in order to generate the hydraulic pressure in the hydraulic expansion mandrel with which the clamping connections are produced.
- the hydraulic mandrel can be actuated hydraulically, the device can have a hydraulic rotary inlet in the area of the counter bearing in order to apply an external hydraulic pressure to the hydraulic expansion mandrel. In this way, the clamping connections can be made and released in an externally controlled manner. In particular, this facilitates an automated tool change.
- the device can have an actuator which is designed to automatically insert the mandrel in a state in which the first and second clamping connections are released along the tool axis into the longitudinal bore of the machining tool and to extend it again .
- the actuator can be, for example, a hydraulic, pneumatic or electric actuator.
- the device can also include the processing tool.
- the machining tool can in particular have a hobbing tool, in particular a grinding worm or a hobbing cutter.
- the machining tool is then preferably mounted on the motor spindle rather than on the work spindle, i.e. the first end of the machining tool is then connected to the motor spindle shaft in order to drive the machining tool for rotation about the tool axis.
- the invention also provides a tool head having a work spindle and an attachment spindle unit of the type described above, the attachment structure of the attachment spindle unit being connected to the work spindle in such a way that the tool axis runs parallel to the work spindle axis.
- such a tool head can also have a base body and a shift carriage that can be displaced relative to the base body along a shifting direction, with the work spindle being arranged on the shift carriage.
- the present invention also provides a gear cutting machine that has a device of the type described above, at least one workpiece spindle to drive a workpiece to rotate about a workpiece axis, and a machine controller. The machine control can then be designed to produce a rolling coupling between the rotation of the machining tool and the rotation of the workpiece.
- FIG. 1 shows an attachment spindle according to an exemplary embodiment in a perspective view
- FIG. 2 shows the attachment spindle of FIG. 1 in a vertical longitudinal section, the section plane containing the tool axis;
- FIG. 5 shows a tool head according to a first exemplary embodiment with the attachment spindle from FIG. 1;
- FIG. 6 shows a machine tool with the tool head of FIG. 5;
- FIG. 7 shows a tool head according to a second embodiment in a perspective view
- FIG. 8 shows the tool head of FIG. 7 in a horizontal longitudinal section, the section plane containing the tool axis.
- an attachment spindle unit 100 is shown according to an embodiment of the invention.
- the attachment spindle unit 100 has a carrier 110 to which a fastening structure 120 is rigidly connected.
- the attachment structure 120 is for attachment the attachment spindle unit 100 on a work spindle of a tool head, as will be explained in more detail below.
- the attachment structure 120 is ring-shaped and thereby defines a ring axis R, which runs centrally through the ring.
- the attachment spindle unit 100 also has a motor spindle 130 and a counter bearing 140 .
- the motor spindle 130 and the counter bearing 140 are each rigidly connected to the carrier 110 .
- a tool 150 in the form of a grinding worm 150 is arranged between the motor spindle 130 and the counter bearing 140 .
- the tool 150 is driven at one end to rotate about a tool axis B by the motor spindle 130 . It is rotatably supported on the counter bearing 140 at its other end.
- the tool axis B runs parallel to the ring axis R.
- the motor spindle 130 is designed as a direct drive in a manner known per se. It has a housing 131 in which a total of four roller bearings 132 are accommodated. A spindle shaft 133 with a tool interface 135 is rotatably mounted in the roller bearings 132 . An electric drive motor 134 serves to drive the spindle shaft 133 directly.
- the roller bearings 132 are arranged on both sides of the drive motor 134 in a manner known per se.
- the area of the spindle shaft 133 which is arranged in these bearings and is close to the tool interface 135 is axial in relation to the tool axis B in these roller bearings fixed.
- the other two roller bearings form an axial floating bearing, i.e. the area of the spindle shaft 133 which is arranged in these bearings can be moved axially to a certain extent in relation to these bearings. This serves in particular to allow thermal expansion of the spindle shaft.
- a rotation measuring system 136 is used to detect the rotational position of the spindle shaft 133 around the tool axis B.
- the counter bearing 140 has a housing 141 in which two roller bearings 142 are accommodated.
- a hollow shaft 143 is rotatably supported in the roller bearings 142 .
- the two roller bearings 142 form an axial floating bearing for the hollow shaft 143, i.e. the hollow shaft 143 is movable to a certain extent along the tool axis B due to the axial play of the two roller bearings 142.
- the tool 150 is shown alone in FIG. It has a receiving flange 151 which carries a grinding body 153 with a helical profile.
- a precision shaft nut 152 fixes the grinding wheel 153 on the mounting flange 151.
- the receiving flange 151 has a short taper seat 155 , known per se, with a flat surface, in order to connect the receiving flange 151 to the tool interface 135 of the motor spindle 130 in a centered manner.
- a complementary outer cone with a planar contact is formed at the tool interface 135 .
- a threaded screw 154 is used to fix the receiving flange 151 axially on the tool interface 135 .
- receiving flange 151 has a central, cylindrical longitudinal bore 156 .
- a short taper connection which is fixed with a threaded screw
- other types of connections between the receiving flange 151 and the tool interface 135 are also possible, as are sufficiently known from the prior art.
- HSK connection hollow shank taper connection
- CaptoTM connection CaptoTM connection
- the tool interface 135 can also have a clamping device, not shown, in a manner known per se, which can be fixed and released in a controlled manner in order to be able to exchange the machining tool 150 more easily.
- the threaded screw 135 can then be omitted accordingly.
- a hydraulic expansion mandrel 160 which is shown alone in FIG. 4, is used to connect the receiving flange 151 to the counter bearing 140.
- the hydraulic expansion mandrel 160 has a cylindrical base body 161 in which an only schematically indicated line system 164 for a hydraulic fluid is formed.
- the hydraulic expansion mandrel has two clamping areas 160a, 160b. In each of these clamping areas, the base body 161 is surrounded by a thin-walled expansion sleeve 162a, 162b.
- Each expansion bushing 162a, 162b delimits a plurality of clamping chambers 163a, 163b radially outwards.
- a hydraulic pressure is generated with a tensioning piston 165, which can be displaced axially by a tensioning screw 166, and is transmitted via the line system 164 to the tensioning chambers 163a, 163b.
- the expansion bushings 162a, 162b expand radially in the area of the clamping chambers 163a, 163b and thus produce radial clamping connections with the hollow shaft 143 of the counter bearing 140 and with the receiving flange 151 of the machining tool 150.
- the axial positions at which the clamping chambers 163a, 163b are located are also referred to as clamping points.
- the hydraulic expansion mandrel 160 has two clamping points in each of the two clamping areas 160a, 160b, ie in total four clamping points. This helps to achieve high flexural rigidity. However, it is also conceivable to provide, for example, only one clamping point in each of the two clamping areas 160a, 160b.
- the two clamping areas 160a, 160b have the same outside diameter in the embodiment of FIG. 4, these outside diameters can also be different.
- the outer diameter of the first clamping area 160a can be selected to be larger than that of the second clamping area 160b. This can be particularly advantageous when using tools whose mounting flange has a longitudinal bore with a particularly small bore diameter. Even within the clamping areas, the outside diameters can vary from clamping point to clamping point, and in particular can gradually decrease in the direction of insertion.
- the hydraulic expansion mandrel 160 projects axially out of the counter bearing 140 at one end. At this end, the hydraulic expansion mandrel 160 has an end piece 167 with a circumferential annular groove 168, the function of which will be described in more detail below in connection with the second exemplary embodiment of a tool spindle.
- the hydraulic expansion mandrel 160 is first pulled completely out of the counter bearing 140 and the machining tool 150 is inserted between the motor spindle 130 and the counter bearing 140 .
- the machining tool 150 is then connected to the tool interface 135 of the motor spindle 130 . Fastening can take place through the counter bearing 140 .
- the hydraulic expansion mandrel 160 is then pushed axially through the hollow shaft 143 of the counter bearing 140 into the longitudinal bore 156 of the receiving flange 151, so that the first clamping area 160a of the hydraulic expansion mandrel 160 comes to rest within the hollow shaft 143 of the counter bearing 140, while the second clamping area 160b is within the Longitudinal bore 156 comes to rest.
- the hydraulic expansion mandrel 160 is now clamped radially with the hollow shaft 143 of the counter bearing 140 and the receiving flange 151 . In order to remove the machining tool 150 again, the procedure is reversed.
- a counter-bearing 140 rigidly connected to the carrier 110 has advantages over a movable counter-bearing in terms of rigidity.
- the tool head includes a base body 210, which is designed as a pivoting body.
- a shift carriage 220 is arranged displaceably along a shift direction Y on the base body 210 .
- the shift direction Y runs parallel to the tool axis B.
- a Y drive 221 is used for the controlled displacement of the shift slide 220 on the base body 210.
- a work spindle 230 is rigidly mounted on the shift carriage 220 .
- the work spindle 230 has a suitable tool interface.
- direct clamping of the machining tool on the work spindle 230 is problematic if it has a small diameter, because a workpiece can then easily collide with the work spindle 230 .
- the attachment spindle unit 100 described above is mounted on the work spindle 230 .
- the attachment structure 120 of the attachment spindle unit 100 surrounds a front area of the housing of the work spindle 230, which is located adjacent to the tool interface of the work spindle 230, and thus fixes the attachment spindle unit 100 on the work spindle 230.
- the tool axis B runs parallel and at a distance from the work spindle axis B′. .
- the required media such as compressed air and electric current, are supplied to the auxiliary spindle unit 100 via a media interface 170 (only indicated schematically), and measurement data can be exchanged with sensors of the auxiliary spindle unit 100 .
- the motor spindle 130 of the attachment spindle unit 100 can be made much more compact than the work spindle 230, which is directly on the due to the small size of the machining tool 150 and the associated lower removal capacity Shift carriage 220 is arranged. Due to the significantly more compact design of the motor spindle 130 of the attachment spindle unit 100, the risk of collisions with a workpiece is greatly reduced. At the same time, the motor spindle 130 and the counter bearing 140 can be optimized specifically for machining tasks with small machining tools.
- the tool speed can be significantly higher with a small machining tool than with a larger machining tool, and accordingly the motor spindle 130 and the counter bearing 140 of the attachment spindle unit 100 can be designed for higher tool speeds than the work spindle 230 on the shift carriage 220.
- FIG. 6 a complete gear cutting machine 1 with the tool head 200 of the present first exemplary embodiment is illustrated by way of example.
- the gear cutting machine 1 has a machine bed 10 on which a tool carrier 20 is arranged such that it can be displaced along a horizontal infeed direction X.
- a Z slide 30 is arranged on the tool carrier 20 so that it can be displaced along a vertical direction Z.
- the tool head 100 already described above is arranged on the Z slide 30 , it being pivotable about a horizontal pivot axis A, which runs parallel to the infeed direction X, relative to the Z slide 30 .
- a workpiece spindle 40 on which a workpiece 41 is clamped.
- the workpiece spindle 40 can be driven to rotate about a workpiece axis C, which runs parallel to the Z-direction.
- the machine also has a machine control 50 that is only shown symbolically.
- the machine control 50 takes over all control and monitoring tasks in the machine.
- the machine control for machining the workpiece 41 produces the correct rolling coupling between the workpiece rotation about the workpiece axis C and the tool rotation about the tool axis B. To this end, it can receive and evaluate signals from the rotation measurement system 136 of the motor spindle 130 and from a rotation measurement system on the workpiece spindle 40 .
- machine shown is only an example and the invention is of course not limited to this example.
- machine concepts are also conceivable in which two or more workpiece spindles are arranged on a movable carrier in order, for example, to be able to machine a workpiece on one of the workpiece spindles while a workpiece spindle is on the other workpiece spindle machined workpiece is replaced by a blank and, if necessary, further operations are carried out.
- Such machine concepts are well known from the prior art.
- a tool head 200 is shown according to a second embodiment.
- the tool head 200 comprises a carrier 210, a shift carriage 220, a Y drive 221, a work spindle 230 rigidly connected to the shift carriage 220, and a counter bearing 240.
- the machining tool 150 is clamped directly onto the work spindle 230 and supported in the counter bearing 240, i.e. no attachment spindle unit is used.
- the connection between the machining tool 150 and the counter bearing 240 takes place in exactly the same way as the connection between the machining tool 150 and the counter bearing 140 in the first exemplary embodiment, namely with the aid of a hydraulic expansion mandrel 160.
- the thrust bearing 240 has a housing 241 in which two roller bearings 242 are held, and a hollow shaft 243 is in turn mounted in the roller bearings 242 .
- the hydraulic expansion mandrel 160 extends through the hollow shaft 243 into a longitudinal bore in the mounting flange of the machining tool 150 and establishes a radial clamping connection with the hollow shaft 243 on the one hand and with the mounting flange on the other.
- the tool head has a linear actuator 250, which in the present example is designed as a hydraulic cylinder 251 acting on both sides with a hydraulic piston 252 that can be displaced therein.
- a linear actuator 250 which in the present example is designed as a hydraulic cylinder 251 acting on both sides with a hydraulic piston 252 that can be displaced therein.
- actuators for example an actuator that can be actuated pneumatically or electrically.
- An actuating arm 253 is connected to the hydraulic piston 252 and engages in the circumferential annular groove 168 in the end piece 167 of the hydraulic expansion mandrel 160 (cf. FIG. 4). The hydraulic expansion mandrel 160 is thus moved axially by actuating the actuator 250 .
- the actuating arm 253 assumes a dual function by additionally including a hydraulic line that is not shown in the drawing. In this way, hydraulic pressure can be applied to the hydraulic expansion mandrel 160 via a hydraulic rotary inlet 245 in order to establish or release the clamping connection in a controlled manner.
- the clamping screw 166 and possibly also the clamping piston 165 can be omitted in such a development. Overall, a fully automatic tool change can be implemented in this way without manual intervention on the hydraulic expansion mandrel 160.
- the structure of the work spindle 230 is also briefly explained below.
- This has a housing 231 in which several roller bearings 232 are arranged.
- a work spindle shaft 233 is rotatably mounted in the roller bearings 232 about the work spindle axis B' and can be driven directly by a drive motor 234 .
- a tool interface 235 serves to connect to the mounting flange of the tool 150. As already indicated in connection with the first embodiment, the tool interface 235 can be designed in any manner known per se, e.g.
- the tool axis B coincides with the work spindle axis B′.
- the invention can be used not only with hobbing tools such as grinding worms or hobs, but also with machining tools that include at least one profile grinding wheel, including combination tools that include at least one grinding worm on a common tool mandrel with at least one profile grinding wheel.
- the tool can in particular also be a polishing tool, e.g. a polishing and grinding worm, or a combination tool with a polishing and grinding area.
- An actuator as in the second embodiment can of course also in a Attachment spindle unit are provided according to the first embodiment. The same applies to the hydraulic rotary union discussed above.
- the counter-bearing can also be part of a second motor spindle in order to drive the tool on both sides.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Turning (AREA)
- Constituent Portions Of Griding Lathes, Driving, Sensing And Control (AREA)
- Drilling And Boring (AREA)
- Jigs For Machine Tools (AREA)
- Gear Processing (AREA)
- Gripping On Spindles (AREA)
Abstract
Description
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Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
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JP2024516574A JP2024535033A (ja) | 2021-09-16 | 2022-09-02 | 歯切り加工する装置、工具ヘッド及び歯切盤 |
KR1020247010690A KR20240056828A (ko) | 2021-09-16 | 2022-09-02 | 기어 절삭 가공을 위한 장치, 공구 헤드 및 기어 절삭 기계 |
EP22773435.7A EP4401908A1 (de) | 2021-09-16 | 2022-09-02 | Vorrichtung für die verzahnbearbeitung, werkzeugkopf und verzahnmaschine |
CN202280062247.9A CN117940243A (zh) | 2021-09-16 | 2022-09-02 | 用于齿部加工的设备、刀具头和齿部加工机器 |
MX2024003326A MX2024003326A (es) | 2021-09-16 | 2022-09-02 | Laminado para empaque de alta barrera con maquinabilidad mejorada. |
Applications Claiming Priority (2)
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CH070280/2021 | 2021-09-16 | ||
CH70280/21A CH718982A1 (de) | 2021-09-16 | 2021-09-16 | Vorrichtung für die Verzahnbearbeitung, Werkzeugkopf und Verzahnmaschine. |
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WO2023041352A1 true WO2023041352A1 (de) | 2023-03-23 |
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PCT/EP2022/074477 WO2023041352A1 (de) | 2021-09-16 | 2022-09-02 | Vorrichtung für die verzahnbearbeitung, werkzeugkopf und verzahnmaschine |
Country Status (8)
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EP (1) | EP4401908A1 (de) |
JP (1) | JP2024535033A (de) |
KR (1) | KR20240056828A (de) |
CN (1) | CN117940243A (de) |
CH (1) | CH718982A1 (de) |
MX (1) | MX2024003326A (de) |
TW (1) | TW202319152A (de) |
WO (1) | WO2023041352A1 (de) |
Citations (10)
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DE2160569A1 (de) * | 1971-12-07 | 1973-06-14 | Hurth Masch Zahnrad Carl | Vorrichtung zum bearbeiten insbesondere von grossen werkstuecken |
DE2517997A1 (de) * | 1975-04-23 | 1976-11-04 | Peter Kostyrka | Innenspanndorn |
US4317577A (en) * | 1980-03-19 | 1982-03-02 | Cameron Gordon N | Rotary expandable tool with hydraulic internal intensifier |
EP0278512A1 (de) * | 1987-02-13 | 1988-08-17 | Liebherr-Verzahntechnik GmbH | Verfahren zur Bearbeitung von Zahnrädern |
EP0516596A1 (de) | 1991-05-31 | 1992-12-02 | MIKRON S.p.A. BOLOGNA | Zahnradwälzfräsmaschine mit spindelosem System zur Unterstützung des Wälzfräsers |
EP2216118A2 (de) | 2009-02-09 | 2010-08-11 | DECKEL MAHO Pfronten GmbH | Vorrichtung zum abwälzenden Bearbeiten eines in eine Werkzeugmaschine eingespannten Werkstücks und Verfahren zum Fertigen eines eine Verzahnung aufweisenden Werkstücks |
KR20130110673A (ko) * | 2012-03-30 | 2013-10-10 | 주식회사 와이지테크 | 호빙머신의 버 제거용 툴 |
EP3153277A1 (de) * | 2015-10-05 | 2017-04-12 | Liebherr-Verzahntechnik GmbH | Bearbeitungskopf mit wuchteinrichtung |
EP3157703A1 (de) * | 2014-06-18 | 2017-04-26 | Samp S.p.a. Con Unico Socio | Verfahren zur endbearbeitung gehärteter zahnräder |
US20190262997A1 (en) * | 2016-07-21 | 2019-08-29 | Comau France | Machine Tool |
-
2021
- 2021-09-16 CH CH70280/21A patent/CH718982A1/de unknown
-
2022
- 2022-08-18 TW TW111131159A patent/TW202319152A/zh unknown
- 2022-09-02 WO PCT/EP2022/074477 patent/WO2023041352A1/de active Application Filing
- 2022-09-02 CN CN202280062247.9A patent/CN117940243A/zh active Pending
- 2022-09-02 JP JP2024516574A patent/JP2024535033A/ja active Pending
- 2022-09-02 KR KR1020247010690A patent/KR20240056828A/ko unknown
- 2022-09-02 EP EP22773435.7A patent/EP4401908A1/de active Pending
- 2022-09-02 MX MX2024003326A patent/MX2024003326A/es unknown
Patent Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2160569A1 (de) * | 1971-12-07 | 1973-06-14 | Hurth Masch Zahnrad Carl | Vorrichtung zum bearbeiten insbesondere von grossen werkstuecken |
DE2517997A1 (de) * | 1975-04-23 | 1976-11-04 | Peter Kostyrka | Innenspanndorn |
US4317577A (en) * | 1980-03-19 | 1982-03-02 | Cameron Gordon N | Rotary expandable tool with hydraulic internal intensifier |
EP0278512A1 (de) * | 1987-02-13 | 1988-08-17 | Liebherr-Verzahntechnik GmbH | Verfahren zur Bearbeitung von Zahnrädern |
EP0516596A1 (de) | 1991-05-31 | 1992-12-02 | MIKRON S.p.A. BOLOGNA | Zahnradwälzfräsmaschine mit spindelosem System zur Unterstützung des Wälzfräsers |
EP2216118A2 (de) | 2009-02-09 | 2010-08-11 | DECKEL MAHO Pfronten GmbH | Vorrichtung zum abwälzenden Bearbeiten eines in eine Werkzeugmaschine eingespannten Werkstücks und Verfahren zum Fertigen eines eine Verzahnung aufweisenden Werkstücks |
KR20130110673A (ko) * | 2012-03-30 | 2013-10-10 | 주식회사 와이지테크 | 호빙머신의 버 제거용 툴 |
EP3157703A1 (de) * | 2014-06-18 | 2017-04-26 | Samp S.p.a. Con Unico Socio | Verfahren zur endbearbeitung gehärteter zahnräder |
EP3153277A1 (de) * | 2015-10-05 | 2017-04-12 | Liebherr-Verzahntechnik GmbH | Bearbeitungskopf mit wuchteinrichtung |
US20190262997A1 (en) * | 2016-07-21 | 2019-08-29 | Comau France | Machine Tool |
Also Published As
Publication number | Publication date |
---|---|
EP4401908A1 (de) | 2024-07-24 |
CN117940243A (zh) | 2024-04-26 |
TW202319152A (zh) | 2023-05-16 |
MX2024003326A (es) | 2024-04-04 |
KR20240056828A (ko) | 2024-04-30 |
CH718982A1 (de) | 2023-03-31 |
JP2024535033A (ja) | 2024-09-26 |
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