US20220371149A1 - Honing machine and method for carrying out honing operations on orthogonally aliged bores in a workpiece - Google Patents

Honing machine and method for carrying out honing operations on orthogonally aliged bores in a workpiece Download PDF

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Publication number
US20220371149A1
US20220371149A1 US17/770,711 US202017770711A US2022371149A1 US 20220371149 A1 US20220371149 A1 US 20220371149A1 US 202017770711 A US202017770711 A US 202017770711A US 2022371149 A1 US2022371149 A1 US 2022371149A1
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United States
Prior art keywords
honing
workpiece
rotary table
horizontal
axis
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Pending
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US17/770,711
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English (en)
Inventor
Oliver Bey
Michael Petschi
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Gehring Technologies GmbH and Co KG
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Gehring Technologies GmbH and Co KG
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Assigned to GEHRING TECHNOLOGIES GMBH + CO. KG reassignment GEHRING TECHNOLOGIES GMBH + CO. KG ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: BEY, OLIVER, PETSCHI, MICHAEL
Publication of US20220371149A1 publication Critical patent/US20220371149A1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B33/00—Honing machines or devices; Accessories therefor
    • B24B33/02—Honing machines or devices; Accessories therefor designed for working internal surfaces of revolution, e.g. of cylindrical or conical shapes
    • B24B33/022—Horizontal honing machines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B27/00—Other grinding machines or devices
    • B24B27/0069—Other grinding machines or devices with means for feeding the work-pieces to the grinding tool, e.g. turntables, transfer means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B27/00—Other grinding machines or devices
    • B24B27/0076—Other grinding machines or devices grinding machines comprising two or more grinding tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B33/00—Honing machines or devices; Accessories therefor
    • B24B33/02—Honing machines or devices; Accessories therefor designed for working internal surfaces of revolution, e.g. of cylindrical or conical shapes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B33/00—Honing machines or devices; Accessories therefor
    • B24B33/10—Accessories

Definitions

  • the invention concerns a honing machine and method for carrying out honing operations on orthogonally aligned bores in a workpiece, in particular for honing of cylinder bores and a bearing race bore in a cylinder crankcase, with the characteristics of the preamble of claim 1 , a honing machine with the characteristics of the preamble of claim 2 , a honing machine with the characteristics of the preamble of claim 4 , and a method for carrying out honing operations on orthogonally aligned bores in a workpiece, in particular for honing of cylinder bores and a bearing race bore in a cylinder crankcase, with the characteristics of the preamble of claim 8 , a method with the characteristics of the preamble of claim 9 , a method with the characteristics of the preamble of claim 10 , and a method with the characteristics of the preamble of claim 11 .
  • crankcase often referred to as a “crankcase” or “engine block”, is an integral component of combustion engines or internal-combustion engines, as they, for example, are used in personal or freight vehicles, aircraft, ships, and stationary facilities.
  • the most common variant is the multi-cylinder engine, the pistons of which are connected to the rotating crank shaft via con rods, and which convey the force generated by the engine to the wheels, ship propellers, aircraft propellers, generators, or similar.
  • the cylinder crankcase is one example of a workpiece with orthogonally aligned bores.
  • crank shaft in straight or V-engines is below, in a boxer engine it is between the cylinders and rests against the cylinder crankcase in the bearings of the crank shaft bearing bore.
  • the bearings are usually slider bearings, sometimes roller bearings.
  • the crank shaft In order to ensure high concentricity of the crank shaft and thus minimize unwanted signs of wear and vibrations during operation, the crank shaft must meet strict form tolerance requirements.
  • the bearings must also be highly tolerated with regard to their size and position in the cylinder crankcase.
  • the relatively strict tolerances of the pertinent parts of a combustion engine and a cylinder crankcase stem from the complex functions of these parts.
  • the shape, dimensions and surface topography of the cylinder bore largely determine the wear, friction, oil use, and emission values of the combustion engine as well as the performance and effectiveness based on the friction.
  • the compressed combustion chamber volume mainly affects the compression of the engine. This in turn affects the performance and, due to the course of combustion, the emission values and engine sounds.
  • crank shaft The exact position of the crank shaft relative to the pistons or cylinder bores is, among other things, important for reducing wear in highly strained engine parts.
  • these are pistons/piston bolts, con rods, and con rod bearings on the crank shaft, as well as the bearing of the crank shaft in the cylinder crankcase.
  • the position of the bore axis not only the absolute position in the space, but also the angle position or orientation plays a role.
  • the crank shaft and entry shaft of the gear move together. This means that precise coaxiality of the two shafts is crucial for a long service life.
  • the task of this invention lies in the provision of a honing machine and a method for carrying out honing operations on orthogonally aligned bores in a workpiece, as with the cylinder crankcase described above, wherein the bores in a workpiece can be processed with high precision, in a short time, with a secure method, completely by means of honing.
  • This task is achieved with a honing machine for carrying out honing operations on orthogonally aligned bores in a workpiece, wherein the honing machine comprises:
  • the transport system comprises a rotary table that rotates around a vertical rotary table axis.
  • the rotary table comprises multiple workpiece intakes.
  • the workpiece intakes are arranged offset from one another in the circumferential direction at a radial distance from the rotary table axis such that a workpiece inserted into a workpiece intake can be successively moved along a circular path and through various workstations of the honing machine via rotation of the rotary table.
  • the rotary table moves workpieces along a circular path from one workstation to another.
  • the transport system facilitates the quick passage of the workpieces between the various workstations.
  • the rotary table can be designed as an elevating rotary table.
  • the rotary table or slab thereof can be round or have a different geometric shape, e.g., triangular or rectangular.
  • the machine-internal transport system make it possible, for example, to load and unload the workpiece intake with one single loading station. Unlike transport machines, it is possible for the workpieces to exit the honing machine at the same location where they entered. This simplifies the loading and unloading, and in particular the coupling of the honing machine to an external conveyor system.
  • An external conveyor system can be used, if necessary, with other honing machines and/or with other processing machines to create a production line.
  • At least one of the workstations is a vertical honing station comprising at least one vertical honing unit.
  • the vertical honing unit comprises having a honing spindle with a honing tool, wherein the spindle axis is aligned parallel to the rotary table axis.
  • the honing of a vertically aligned bore is performed via a relative motion rotating around a spindle axis and translatory along the spindle axis, between the workpiece and the honing spindle or honing tool. This relative motion is usually oscillating.
  • the spindle is typically rotated in the bore and moved back and forth along the bore axis.
  • the horizontal honing unit comprises a honing spindle with a honing tool.
  • the honing of a horizontally aligned bore is performed via a relative motion rotating around a horizontal spindle axis and translatory along the horizontal spindle axis, between the workpiece and honing spindle or honing tool. This relative motion is usually oscillating.
  • the spindle is typically rotated in the bore and moved back and forth along the bore axis.
  • honing retainers of the tool are set to an oversize, meaning that they have a processing diameter that is slightly greater than the diameter of the bore being processed.
  • the honing machine further comprises an actuator unit. This is designed and arranged such that the actuator unit moves the workpiece in order to carry out the honing in the horizontal honing station.
  • the honing spindle of the horizontal honing unit can be arranged immovably in the honing machine, in particular during the honing. But it is also possible, that during the honing, in addition to the movement of the workpiece, the honing spindle of the horizontal honing unit also moves, in particular in inverted direction, to participate in the aforementioned relative motion between the workpiece and honing spindle.
  • the motion of the workpiece via the actuator unit can reduce the motion of the horizontal honing unit or, if the horizontal honing unit is immobile, only be limited to the rotation of the honing spindle. This increases the precision with which the honing spindle or honing tool can be used during the honing. This results in a more precise overall result of the honing operation.
  • the task at hand is also achieved with a honing machine with the characteristics of the preamble of claim 1 , in particular with the characteristics of claim 1 , wherein the machine-internal transport system is designed such that the workpiece is moved from the rotary table to carry out the honing in the horizontal honing station.
  • the honing is carried out outside of the rotary table.
  • the workpiece is transported in particular outside of the circular path where the rotary table moves the workpieces. It is possible for the workpiece to be rotated and aligned outside of the rotary table.
  • a device for moving the workpiece from the rotary table, and that also returns the workpiece to the rotary table is typically provided. During the movement of the rotary table, the workpiece does not leave the honing machine.
  • the processing is typically carried out outside of the rotary table, but on the same machine base where the rotary table is also located.
  • the task at hand is achieved with a honing machine with the characteristics of the preamble of claim 1 , in particular with the characteristics of claim 1 or 2 , wherein the horizontal spindle axis extends along a processing direction.
  • the translatory relative motion during the honing occurs along an axis specified by the processing direction.
  • the processing direction is parallel to a direction extending radially through the rotary table axis, yet is spaced from the rotary table axis. In other words, the processing direction runs along a straight line that does not pass through the center of the rotary table.
  • the horizontal honing unit can be more flexibly positioned and aligned on the honing machine.
  • multiple, in particular two horizontal honing units can be placed next to each other and/or parallel to each other on the honing machine. This results in acceleration of the entire process.
  • the task at hand is achieved with a honing machine with the characteristics of the preamble of claim 1 , in particular with the characteristics of claim 1 , 2 , or 3 , wherein the horizontal honing station comprises a workpiece intake comprising a rotational device with a rotating axis parallel to the rotary table axis, with which the alignment of the workpiece can be changed.
  • the honing in the horizontal honing station can be carried out with a different alignment than in the vertical honing station.
  • the horizontal honing unit can be more flexible positioned and aligned on the honing machine. With an immobile workpiece or a workpiece firmly positioned on the rotary table with a fixed alignment, the position and alignment of the horizontal honing unit would be specified by the orientation or alignment of the workpiece.
  • all workstations of the respective honing machine are arranged on a shared machine base.
  • the alignment of the rotary table and at least one of all the workstations on the machine base improves the compactness and speed of the honing machine.
  • the honing machine comprises at least two vertical honing stations. At least one vertical honing station comprises one vertical honing unit moveably arranged on a portal-like carrier via sliders. All vertical honing units can also be moveably arranged on the portal-like carrier via sliders.
  • the use of multiple vertical honing stations and/or vertical honing units facilitates the simultaneous processing of multiple vertically aligned bores. It is also possible for a vertical honing station to comprise multiple vertical honing units, so that honing operations can be simultaneously performed in multiple vertically aligned bores in a workpiece in a vertical honing station. Accordingly, honing operations can be simultaneously performed in multiple vertically aligned bores in various workpieces in various vertical honing stations. The simultaneous carrying out of multiple honing operations reduces the overall processing time of the honing machine.
  • At least one of the workstations can be an empty station or a workstation for carrying out other processing operations, e.g., chamfering.
  • the honing machine comprises four workstations.
  • the first workstation is a loading and unloading station, where a workpiece to be honed is placed on the rotary table or removed from the rotary table.
  • a second workstation is designed as a first vertical honing station. In particular, it can be used for pre-honing.
  • a third workstation is designed as a horizontal honing station. The horizontal honing operations are carried out here.
  • a fourth workstation is designed as the second vertical honing station. It can be used for final honing.
  • the transport direction of the rotary table is from the first to the second, or rather the third to the fourth, workstation. After completing the fourth workstation, the workpiece returns to the first workstation.
  • the number of workstations and their respective design namely as a loading/unloading station, two vertical honing stations, one horizontal honing station, optimizes the total processing time of the workpieces through as many simultaneous operations as possible, and also facilitates a honing machine as compact as possible, which works precisely.
  • such a division can advantageously integrate the moving or tilting of the workpiece in the horizontal honing station into the work cycle. This applies accordingly to the acceleration of the workpiece when it is being moved.
  • the task at hand is achieved by the invention's method for carrying out honing operations on orthogonally aligned bores in a workpiece with the characteristics of claim 8 .
  • the workpiece is moved during the honing in the horizontal honing station.
  • the honing spindle of the horizontal honing unit is at least kept immobile in the direction of the translatory relative motion.
  • the movement of the workpiece can reduce the movement of the horizontal honing unit, or, if the horizontal honing unit is immobile, limited to the rotation of the honing spindle or a honing tool arranged at the honing spindle. This increases the precision with which the honing spindle or honing tool can be used during the honing processing. This results in a more precise overall result of the honing operation.
  • the method steps described herein partially correspond to the structural designs of the honing machines described. The benefits listed herein are also present in the method steps.
  • the task at hand is achieved with a method with the characteristics of the preamble of claim 8 , in particular with the characteristics of claim 8 , wherein, in order to carry out the horizontal honing, the workpiece is moved away from the rotary table, and the honing is carried out outside of the rotary table, in particular wherein the workpiece is moved outside of the circular path where the rotary table moves the workpieces.
  • the task at hand is achieved with a method with the characteristics of the preamble of claim 8 , in particular with the characteristics of claim 8 or 9 , wherein the horizontal spindle axis runs along a processing direction.
  • the translatory relative motion during the honing occurs along this axis.
  • the processing direction is parallel to a direction extending radially through the rotary table axis, yet is spaced from the rotary table axis. In other words, the processing direction runs along a straight line that does not pass through the rotary table axis.
  • the horizontal honing unit can be more flexibly arranged and aligned.
  • two horizontal honing units can be positioned next to and parallel to one another. It is also possible to position a horizontal honing unit and a measuring station next to and parallel to one another. This accelerates the overall process.
  • the task at hand is also achieved with a method with the characteristics of the preamble of claim 8 , in particular with the characteristics of claim 8 , 9 , or 10 , wherein before the horizontal honing is carried out, the alignment of the workpiece is altered. It is also possible for the alignment of the workpiece to be altered during and/or after the horizontal honing.
  • the horizontal honing unit can be more flexible arranged and aligned.
  • the position and alignment of the horizontal honing unit would be specified by the orientation or alignment of the workpiece.
  • FIG. 1 a top view of a honing machine described by the invention
  • FIG. 2 a side view of the honing machine described by the invention as shown in FIG. 1 ;
  • FIG. 3 a top view of another example embodiment of a honing machine described by the invention.
  • FIG. 4 a side view of the honing machine described by the invention as shown in FIG. 3 .
  • FIG. 1 shows a top view of a honing machine 10 described by the invention for carrying out honing operations on orthogonally aligned bores in a workpiece 12 .
  • the honing machine 10 comprises a machine base 14 where a transport system 16 is located.
  • the transport system 16 comprises a rotary table 18 that rotates around a vertical rotary table axis 20 .
  • Four workpiece intakes 22 are arranged on the rotary table 18 , wherein each of the workpiece intakes 22 can receive one workpiece 12 .
  • Rotation of the rotary table 18 around the rotary table axis 20 transports the workpieces 12 on a circular path.
  • the workpieces 12 are then led to the individual workstations.
  • Four workstations are indicated by four workpieces 12 .
  • the workstation shown on the right in FIG. 1 is a horizontal honing station 24 .
  • the horizontal honing station 24 comprises a horizontal honing unit 26 comprising a honing spindle 28 with a honing tool.
  • the honing spindle 28 or honing tool is aligned along a horizontal spindle axis 30 .
  • the horizontal honing operation is thus carried out along this horizontal spindle axis 30 .
  • the honing machine 10 also comprises an actuator unit 32 positioned on the machine base 14 that can move the workpiece 12 back and forth along the horizontal spindle axis 30 via a track system.
  • an actuator unit 32 positioned on the machine base 14 that can move the workpiece 12 back and forth along the horizontal spindle axis 30 via a track system.
  • the workpiece 12 is moved radially away from the rotary table 18 so that there is no more direct contact between the workpiece 12 and the rotary table 18 , and the rotary table is essentially vibrationally disconnected from the workpiece.
  • Such a disconnection of the workpiece 12 prevents the transfer of the vibrations and oscillations from the horizontal honing operations via the workpiece 12 to the rotary table 18 and thus to other workpieces 12 or workstations.
  • the workpiece 12 is aligned in the actuator unit 32 such that a horizontally aligned bore that is to be honed is arranged along the horizontal spindle axis 30 .
  • the horizontal honing unit 26 is firmly positioned on the machine basis 14 so that the honing spindle 28 is immovable along the horizontal spindle axis 30 .
  • the honing spindle 28 or honing tool only carries out a rotation during the horizontal honing operation.
  • the workpiece 12 is moved back and forth along the horizontal spindle axis 30 via the actuator unit 32 , while the honing spindle 28 or honing tool rotates so that the honing operation can be carried out on the bore previously aligned along the horizontal spindle axis 30 .
  • the workpiece 12 is returned to the workpiece intake 22 of the rotary table 18 and transported to the next workstation via rotation of the rotary table 18 around its vertical rotary table axis 20 .
  • the individual workstations can be a loading and unloading station, a vertical honing station, a measuring station, or another horizontal honing station 24 .
  • the workstation indicated on the left in FIG. 1 by the workpiece 12 can be a loading and unloading station, and the workstations indicated at the top and bottom of FIG. 1 via workpieces 12 can be vertical honing stations with vertical honing units (not pictured).
  • the workstation indicated at the top of FIG. 1 by the workpiece 12 can be used for vertical pre-honing, and the workstation indicated at the bottom of FIG. 1 by the workpiece 12 can be used for vertical final honing.
  • At least one of the workstations can also be a measuring station, with which the honing operations carried out at the respective bores can be evaluated and monitored. But it is also possible for the measurement to be conducted with a measuring unit 34 at a workstation that is not a measuring station.
  • the measuring unit 34 shown in FIG. 1 is arranged on the machine base 14 via sliders such that post-measuring of the horizontal bore is possible, while, for example, the workpiece 12 is located in the workstation for vertical shape honing (see above).
  • FIG. 2 shows a side view of the honing machine 10 described by the invention as shown in FIG. 1 .
  • the workpiece 12 is radially moved outward away from the rotary table 18 in order to achieve the aforementioned disconnection of the workpiece 12 from the rotary table 18 .
  • the rotary table 18 in this example embodiment is an elevating rotary table. This means that the rotary table 18 can be lowered after transporting the workpieces 12 into the next respective workstation. The workpieces 12 then remain in the respective workstations and are no longer connected with the rotary table 18 .
  • the rotary table 18 is thus not a medium by which unwanted vibrations or oscillations generated in the individual workstations can be transferred between the individual workpieces 12 or workstations.
  • FIG. 3 shows a top view of another example embodiment of a honing machine 10 described by the invention.
  • the horizontal honing unit 26 is positioned on the machine base 14 such that the horizontal spindle axis 30 does not run through the rotary table axis 20 . Accordingly, the workpiece 12 must be aligned along this horizontal spindle axis 30 with its horizontally aligned bore. This is done with a rotational device not further explained herein.
  • the horizontal honing unit 26 is moveable via tracks so that the horizontal honing unit 26 , and thus the honing spindle 28 , can move back and forth along the horizontal spindle axis 30 with a honing tool.
  • the honing spindle 28 is lowered into the workpiece 12 or the bore of the workpiece 12 to be honed by moving the horizontal honing unit 26 following alignment of the workpiece 12 .
  • the workpiece 12 is once again rotated by the rotational device (not pictured) so that the honing operation can be evaluated and monitored by the measuring device 34 .
  • the rotated workpiece 12 and its alignment are shown in FIG. 3 with a thin, dashed line.
  • the measuring device 34 is also moveably positioned along an axis on the machine base 14 via tracks.
  • the horizontal honing and post-measuring can thus be carried out at the same workstation.
  • a separate workstation for the post-measuring or post-monitoring of the horizontal honing operations is not necessary. Nevertheless, a measuring station may be provided as a workstation where only post-measuring is carried out.
  • the individual workstations can be a loading and unloading station, a vertical honing station, a (additional) measuring station, or another horizontal honing station 24 .
  • FIG. 4 shows a side view of the honing machine 10 described by the invention as shown in FIG. 3 .
  • the rotary table 18 is designed as an elevating rotary table in order to prevent the transfer/spread of unwanted oscillations or vibrations via the rotary table 18 .

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Geometry (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
US17/770,711 2019-10-21 2020-10-21 Honing machine and method for carrying out honing operations on orthogonally aliged bores in a workpiece Pending US20220371149A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102019128351.5 2019-10-21
DE102019128351.5A DE102019128351A1 (de) 2019-10-21 2019-10-21 Honmaschine und ein Verfahren zur Durchführung von Honoperationen an orthogonal zueinander ausgerichteten Bohrungen in einem Werkstück
PCT/EP2020/079574 WO2021078775A1 (de) 2019-10-21 2020-10-21 Honmaschine und ein verfahren zur durchführung von honoperationen an orthogonal zueinander ausgerichteten bohrungen in einem werkstück

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US20220371149A1 true US20220371149A1 (en) 2022-11-24

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US17/770,711 Pending US20220371149A1 (en) 2019-10-21 2020-10-21 Honing machine and method for carrying out honing operations on orthogonally aliged bores in a workpiece

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US (1) US20220371149A1 (de)
EP (1) EP3860804B1 (de)
CN (1) CN114555295B (de)
DE (1) DE102019128351A1 (de)
WO (1) WO2021078775A1 (de)

Citations (2)

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US20130025124A1 (en) * 2011-07-27 2013-01-31 Grob-Werke Gmbh & Co. Kg Method and Machining Installation for the Finishing of a Crankshaft Bearing Bore
US20190039202A1 (en) * 2016-02-01 2019-02-07 Nagel Maschinen- Und Werkzeugfabrik Gmbh Honing machine with multiple workstations

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DE102004031922A1 (de) * 2004-06-23 2006-01-19 Nagel Maschinen- Und Werkzeugfabrik Gmbh Vorrichtung und Verfahren zum automatisierten Wechseln von Honwerkzeugen
DE102007045619B4 (de) * 2007-09-17 2010-06-10 Gehring Technologies Gmbh Vorrichtung zur Feinbearbeitung von Werkstücken
DE102010010901B4 (de) * 2010-03-05 2016-06-23 Nagel Maschinen- Und Werkzeugfabrik Gmbh Verfahren und Vorrichtung zum Feinbearbeiten einer Kurbelwellenlagerbohrung
CN203156546U (zh) * 2013-04-07 2013-08-28 奉化市星宇电子有限公司 一种珩磨工艺装备
CN204397596U (zh) * 2014-11-11 2015-06-17 上海善能机械有限公司 数控立式高精度珩磨机
CN105415347A (zh) * 2015-11-18 2016-03-23 欧阳庆丰 一种回转式人与机械手协同作业的工艺
CN106424819B (zh) * 2016-10-20 2018-08-24 成都久欣时代科技有限公司 导弹舵片钻孔***
DE102016221777A1 (de) * 2016-11-07 2018-05-09 Nagel Maschinen- Und Werkzeugfabrik Gmbh Honmaschine mit mehreren Arbeitsstationen
CN109079559A (zh) * 2018-10-19 2018-12-25 王亮 一种转盘式多工位交换台卧式加工中心

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US20130025124A1 (en) * 2011-07-27 2013-01-31 Grob-Werke Gmbh & Co. Kg Method and Machining Installation for the Finishing of a Crankshaft Bearing Bore
US20190039202A1 (en) * 2016-02-01 2019-02-07 Nagel Maschinen- Und Werkzeugfabrik Gmbh Honing machine with multiple workstations

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CN114555295A (zh) 2022-05-27
WO2021078775A1 (de) 2021-04-29
EP3860804A1 (de) 2021-08-11
DE102019128351A1 (de) 2021-04-22
CN114555295B (zh) 2023-08-29
EP3860804B1 (de) 2022-05-11

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