CN106938441B - Device for finishing a workpiece - Google Patents

Device for finishing a workpiece Download PDF

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Publication number
CN106938441B
CN106938441B CN201610826094.7A CN201610826094A CN106938441B CN 106938441 B CN106938441 B CN 106938441B CN 201610826094 A CN201610826094 A CN 201610826094A CN 106938441 B CN106938441 B CN 106938441B
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CN
China
Prior art keywords
force
axis
tool
measuring device
delivery
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CN201610826094.7A
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Chinese (zh)
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CN106938441A (en
Inventor
迈克尔·沃尔勒
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Supfina Grieshaber GmbH and Co KG
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Supfina Grieshaber GmbH and Co KG
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Publication of CN106938441A publication Critical patent/CN106938441A/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
    • B24B49/00—Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation
    • 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
    • B24B33/055—Honing machines or devices; Accessories therefor designed for working plane surfaces
    • 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
    • B24B19/00—Single-purpose machines or devices for particular grinding operations not covered by any other main group
    • 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
    • B24B33/06—Honing machines or devices; Accessories therefor with controlling or gauging equipment
    • 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
    • B24B35/00—Machines or devices designed for superfinishing surfaces on work, i.e. by means of abrading blocks reciprocating with high frequency
    • 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
    • B24B41/00—Component parts such as frames, beds, carriages, headstocks
    • 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
    • B24B41/00—Component parts such as frames, beds, carriages, headstocks
    • B24B41/007—Weight compensation; Temperature compensation; Vibration damping
    • 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
    • B24B49/00—Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation
    • B24B49/16—Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation taking regard of the load

Abstract

The invention relates to a device (10) for finishing a workpiece (18), comprising: a tool mandrel (26) for finishing a tool (12); a delivery device (32) for delivering the tool mandrel (26); a force measuring device (56) acting between the tool mandrel (26) and the delivery device (32); and a connecting device (44) which acts between the tool mandrel (26) and the delivery device (32) and is used for connecting the tool mandrel (26) and the delivery device (32), wherein the connecting device (44) comprises two parts (46, 48) which can move relative to each other and are connected with each other through the force measuring device (56), so that the force measuring device (56) is a connecting component of the connecting device (44).

Description

Device for finishing a workpiece
Technical Field
The invention relates to a device for finishing a workpiece, comprising a tool mandrel for finishing a tool, a delivery device for delivering the tool mandrel, a force measuring device acting between the tool mandrel and the delivery device, and a connecting device acting between the tool mandrel and the delivery device and connecting the tool mandrel and the delivery device.
Background
EP 1329289a2 discloses such a device. In this device, the connecting means is formed by a leaf spring and supports the tool spindle on the delivery device. A force measuring device in the form of a piezoelectric element is used to measure the processing forces occurring during the finishing of the workpiece.
A disadvantage of the known device is that the machining forces occurring during the finishing of the workpiece can lead to vibrations, which reduce the finishing accuracy of the workpiece.
Disclosure of Invention
In view of the above problems, it is an object of the present invention to improve a device of the type described above such that the processing force can be measured without reducing the finishing accuracy of the workpiece.
The above object is achieved by a device of the above-mentioned type according to the invention in which the connecting device comprises two parts which can be moved relative to one another and which are connected to one another by means of a force-measuring device, so that the force-measuring device is a component of the connecting device for force transmission.
According to the invention, the force measuring device is a component of the connecting device for transmitting force. Within the scope of the present invention, a connection means is understood to be a means of producing a mechanical connection between the delivery means and the tool mandrel. The force measuring device is an integral part of the connecting device. The force measuring device receives at least a portion of the force required for mechanical retention between the delivery device and the tool mandrel; thus, disassembly of the force measuring device results in disconnection of the mechanical connection between the tool spindle and the delivery device.
According to the invention, by integrating the force measuring device into the connecting device, a generally stable construction can be obtained, which does not reduce the finishing accuracy of the workpiece. At the same time, the processing forces occurring during the finishing of the workpiece can be measured, since they are transmitted from the tool spindle to the delivery device via the connecting device.
A particularly simple construction of the connecting device is obtained when the first part of the connecting device is connected to the delivery device and the second part of the connecting device is connected to the tool spindle.
In a particularly preferred stabilization, the component is designed as a flat plate. The flat body itself is mechanically stable and accordingly serves as a carrier for the tool mandrel or the delivery device.
To further increase stability, the components are preferably only able to move relative to each other in a single degree of freedom.
A particularly simple construction is obtained when a single degree of freedom is the relative pivotability of the parts.
Preferably, the force measuring device can be loaded with tensile and/or compressive forces and resists relative movement of the components. In particular, the force measuring device can only be loaded with tensile and/or compressive forces. In a particularly preferred variant, the force measuring device is provided only for receiving the compression force. As an integral part of the connecting device, the force measuring device transmits the static connecting force required for the mechanical connection between the delivery device and the tool spindle. The value of the static coupling force depends on the weight of the component and the orientation of the device; the static coupling force can be measured by the force measuring device, for example from a "zero point", starting from which the processing force occurring during operation of the device is then measured. The processing force measured by the force measuring device and the static coupling force extend along the same force transmission axis.
In a particularly preferred embodiment, the connecting device comprises a pivot bearing which is arranged at a distance from the force measuring device and from the axis of the tool spindle and by means of which the parts can be pivoted relative to one another. A simple and stable construction of the connecting device is thereby obtained, which furthermore also enables a simple pivoting of the processing forces which, starting from the workpiece, have an effect on the tool arranged on the tool spindle and are then guided into the connecting device by the tool spindle and reach the force measuring device.
If the pivot axis defined by the pivot bearing extends at an angle, in particular perpendicularly, to the delivery axis of the delivery device, the angle of action of the finishing tool relative to the workpiece can be adjusted, in particular when machining flat and spherical surfaces, and thus the geometric parameters of the so-called "cross-grinding" can be influenced.
Furthermore, the force measuring device is preferably arranged in the force transmission path of the distance adjusting device acting between the components. The distance adjustment device enables the adjustment of the distance between the components in the sense of the spacing between the components measured along the force measuring device. The spacing adjustment device is capable of adjusting an absolute spacing between the components or is capable of adjusting an angular spacing between the components.
Other features and advantages of the present invention are set forth in the following description of the preferred embodiments and the accompanying drawings.
Drawings
FIG. 1 illustrates a perspective view of an embodiment of an apparatus for finishing a workpiece;
FIG. 2 shows a side view of the device of FIG. 1 with the tool mandrel of the device in an initial position; and
fig. 3 shows a side view similar to fig. 2, wherein the tool mandrel is in an operating position inclined with respect to the initial position.
Detailed Description
In the drawings, an apparatus for finishing a workpiece is generally indicated by reference numeral 10. The device 10 comprises a finishing tool 12, the finishing tool 12 being designed, for example, in the form of a cup wheel. The cup wheel has an annular active surface 14 on its end face, with which a flat or spherical surface 16 of a workpiece 18 can be machined.
The workpiece 18 is received in a workpiece holder 20 (e.g., a chuck). The drive workpiece 18 is driven in rotation about a drive axis 24 by a workpiece drive 22.
The tool 12 is held on a tool mandrel 26 and is driven in rotation about a mandrel axis 30 by a drive device 28. The spindle axis 30 and the drive axis 24 of the workpiece 18 extend substantially parallel to one another or are inclined at a few degrees (e.g., a maximum of 5 °) relative to one another.
In order to be able to deliver the active surface 14 of the tool 12 in the direction of the workpiece 18 and to leave it again, a delivery device is provided, which is designated as a whole by reference numeral 32. The delivery device 32 comprises a carriage 34, the carriage 34 being connected to a drive device 36, and the drive device 36 acting on a carriage 38. The carriage 38 can be displaced along a delivery axis 40 by the drive device 36. The delivery axis 40 extends parallel or at least substantially parallel (e.g., inclined at 5 ° at maximum) relative to the mandrel axis 30. The delivery device 32 is also used to generate a pressing force with which the active surface 14 of the finishing tool 12 is pressed onto the surface 16 of the workpiece 18.
For connecting the slide 38 of the delivery device 32 on the one hand and the housing 42 of the tool spindle 26 on the other hand, the device 10 comprises a connecting device indicated as a whole by 44.
The connecting means 44 comprises two plate- shaped parts 46 and 48 which are movable relative to each other. The first part 46 is connected to the slide 38 of the delivery device 32, in particular in a bolted manner. The second part 48 is connected to the housing 42 of the tool spindle 26, in particular in a bolted connection.
To connect the components 46 and 48, a pivot bearing 50 is provided, the pivot bearing 50 defining a pivot axis 52. The pivot axis 52 has a spacing 54 relative to the spindle axis 30 of the tool spindle 26. The pivot bearing 50 is only schematically shown in the drawings. The pivot bearing includes a pivot pin and a bushing surrounding the pivot pin, for example, in a conventional manner.
The pivot pin between the components 46 and 48 connects the components 46 and 48 so that they can only move relative to each other in a single degree of freedom. Thus, the components 46 and 48 can only pivot relative to each other about the pivot axis 52. Advantageously, the pivot axis 52 is located on the end of the members 46 and 48 adjacent the tool 12.
To prevent pivoting between the components 46 and 48, the connecting device 44 comprises a connecting region 54, the connecting region 54 acting as a force-conducting component of the connecting device 44. Only tensile and compressive forces are transmitted in the connection region 54. In the connecting region 54, the connecting force acting between the components 46 and 48 is transmitted via a force measuring device 56. The force measuring device 56 may be formed, for example, by a load cell.
In the connecting region 54, the force measuring device 56 transmits tensile and compressive forces along a force transmission axis 58.
In particular, the force measurement device 56 transmits only compressive forces along the force transmission axis 58. In this case, it is advantageous if the force-measuring device 56 comprises two parts which are movable relative to one another, are biased relative to one another by a spring and are spaced apart from one another by the sensor unit. In this way, the components 46 and 48 can be positioned relative to each other without play.
The force transmission axis 58 is arranged at an angle, in particular perpendicularly or at least substantially perpendicularly, with respect to the pivot axis 52 and has a spacing 60 with respect to the pivot axis 52.
In the connecting region 54, a distance adjustment device 62 is arranged mechanically in series with the force measuring device. The spacing adjustment device 62 includes, for example, an adjustment shaft 64, the adjustment shaft 64 being connected at one end to one of the components 46 and 48 and at the other end to the force measurement device 56. To fix the spacing adjustment device 62, an adjustment nut 66 may be provided.
The spacing adjustment device 62 allows adjustment of the spacing between the components 46 and 48 as measured along the force transmission axis 58. By spacing the force transmission axis 58 relative to the pivot axis 52, a change in the spacing existing between the components 46 and 48 along the force transmission axis results in the components 46 and 48 pivoting relative to one another about the pivot axis 52, see fig. 2 and 3. In this way, the inclination angle of the spindle axis 30 can be adjusted. For example, the axes 24 and 30 can extend parallel to each other (see fig. 2); or axes 24 and 30 extend obliquely relative to each other (see fig. 3).
During finishing of the workpiece 18, the workpiece 18 is rotated about an axis 24. Simultaneously, the tool 12 is rotated about the mandrel axis 30. The active face 14 of the tool 12 engages a workpiece face 16 of a workpiece 18. Since the compressive force of the tool 12 is applied to the workpiece 18 for finishing the workpiece 18, the tool 12 is subjected to a corresponding pressing force, which is denoted by reference numeral 62 in fig. 2. The pressing force 62 influences, via the "lever arm" 54, a torque about the pivot axis 52 acting on the tool spindle 26 (which torque extends in the clockwise direction about the pivot axis 52, corresponding to the illustration in fig. 2).
The force measuring device 56, which is spaced relative to the pivot axis 52 by means of a "lever arm" 60, applies an opposing torque to the tool spindle 26, so that it is stationary relative to the pivot axis 52. The opposing torque is equal to the product of the processing force (the reaction force corresponding to the compressive force applied by the second component 48 to the force measuring device) measured by the force measuring device 56 along the force transmission axis 58 and the length of the "lever arm" 60.
Accordingly, the compressive force 62 is equal to the product of the processing force measured by the force measuring device 56 and the lever arm factor (separation 60 divided by separation 54).

Claims (7)

1. An apparatus (10) for finishing a workpiece (18), the apparatus comprising:
a tool mandrel (26) for finishing a tool (12);
a delivery device (32) for delivering the tool mandrel (26);
a force measuring device (56) acting between the tool mandrel (26) and the delivery device (32); and
a connecting device (44) acting between the tool mandrel (26) and the delivery device (32) for connecting the tool mandrel (26) and the delivery device (32),
characterized in that the connecting device (44) comprises two parts (46, 48) which can be moved relative to one another and which are connected to one another by the force-measuring device (56), so that the force-measuring device (56) is a component of the connecting device (44) for force transmission,
the connecting device (44) comprises a pivot bearing (50) which is arranged at a distance from the force measuring device (56) and from the spindle axis (30) of the tool spindle, wherein a force transmission axis (58) of the force measuring device (56) is arranged at an angle to a pivot axis (52) of the pivot bearing (50), wherein a change in the distance between the parts (46, 48) along the force transmission axis (58) causes the parts (46, 48) to be pivotable relative to one another via the pivot bearing.
2. The device (10) of claim 1, wherein a first component (46) is connected to the delivery device (32) and a second component (48) is connected to the tool mandrel (26).
3. Device (10) according to claim 1 or 2, characterized in that the parts (46, 48) are formed as flat bodies.
4. Device (10) according to claim 1 or 2, characterized in that the force measuring device (56) can be loaded with tensile and/or compressive forces and resists relative movement of the parts (46, 48).
5. The device (10) of claim 1, wherein the pivot axis (52) defined by the pivot bearing (50) extends at an angle relative to a delivery axis (40) of the delivery device (32).
6. The device (10) of claim 5, wherein the pivot axis (52) defined by the pivot bearing (50) extends perpendicularly relative to the delivery axis (40) of the delivery device (32).
7. Device (10) according to claim 1 or 2, characterized in that the force measuring device (56) is arranged in the force transmission path of a spacing adjustment device (62) acting between the components (46, 48).
CN201610826094.7A 2015-09-15 2016-09-14 Device for finishing a workpiece Active CN106938441B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102015217600.2A DE102015217600B4 (en) 2015-09-15 2015-09-15 Device for finishing workpieces
DE102015217600.2 2015-09-15

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CN106938441A CN106938441A (en) 2017-07-11
CN106938441B true CN106938441B (en) 2020-09-15

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Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4005399C1 (en) * 1990-02-21 1991-04-11 Bernhard Dr.-Ing. 4782 Erwitte De Juergenhake Ensuring connection quality of crimped tags - comparing electrical connection with predetermined value and finishing processing only if within tolerance range
DE69009890T2 (en) * 1989-02-23 1994-09-22 Supfina Maschf Hentzen METHOD AND DEVICE FOR FINISHING AND SUPFINING.
JPH09234524A (en) * 1996-02-29 1997-09-09 Nisshinbo Ind Inc Method for controlling setting condition of work in pipe working machine
DE202006017265U1 (en) * 2006-11-11 2007-01-18 Thielenhaus Technologies Gmbh Support for tool spindle has two sections joined by one-piece, elastically deformable bridges that enable relative movement between sections in at least one direction of plane and that are stiff perpendicular to plane
DE102007024760A1 (en) * 2007-05-26 2008-07-17 Thielenhaus Technologies Gmbh Method for fine grinding of inner surfaces of roller bearing rings, involves determining contact of the cup wheel on workpiece by workpiece power sensors and measurement signals of sensors applied
CN102248476A (en) * 2010-03-09 2011-11-23 纳格尔机械及工具制造厂有限责任公司 Method and apparatus for the measurement-aided fine machining of workpiece surfaces, and measuring system
CN103213067A (en) * 2012-01-23 2013-07-24 德国索菲纳有限公司 Finishing device for finishing a workpiece
CN104842697A (en) * 2015-05-29 2015-08-19 福建省天大精诺信息有限公司 Single-pillar rough and finish machining integrated machine

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3112991C2 (en) * 1981-04-01 1985-12-12 Hoesch Ag, 4600 Dortmund Cylindrical grinding machine for the controlled grinding of cracks on rollers
DE10201639A1 (en) 2002-01-17 2003-07-31 Thielenhaus Ernst Gmbh & Co Kg Process for finishing workpieces
JP4098761B2 (en) * 2004-08-17 2008-06-11 ファナック株式会社 Finishing method
US7645180B2 (en) * 2007-10-18 2010-01-12 Thielenhaus Microfinish Corporation Method for finishing a workpiece

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE69009890T2 (en) * 1989-02-23 1994-09-22 Supfina Maschf Hentzen METHOD AND DEVICE FOR FINISHING AND SUPFINING.
DE4005399C1 (en) * 1990-02-21 1991-04-11 Bernhard Dr.-Ing. 4782 Erwitte De Juergenhake Ensuring connection quality of crimped tags - comparing electrical connection with predetermined value and finishing processing only if within tolerance range
JPH09234524A (en) * 1996-02-29 1997-09-09 Nisshinbo Ind Inc Method for controlling setting condition of work in pipe working machine
DE202006017265U1 (en) * 2006-11-11 2007-01-18 Thielenhaus Technologies Gmbh Support for tool spindle has two sections joined by one-piece, elastically deformable bridges that enable relative movement between sections in at least one direction of plane and that are stiff perpendicular to plane
DE102007024760A1 (en) * 2007-05-26 2008-07-17 Thielenhaus Technologies Gmbh Method for fine grinding of inner surfaces of roller bearing rings, involves determining contact of the cup wheel on workpiece by workpiece power sensors and measurement signals of sensors applied
CN102248476A (en) * 2010-03-09 2011-11-23 纳格尔机械及工具制造厂有限责任公司 Method and apparatus for the measurement-aided fine machining of workpiece surfaces, and measuring system
CN103213067A (en) * 2012-01-23 2013-07-24 德国索菲纳有限公司 Finishing device for finishing a workpiece
CN104842697A (en) * 2015-05-29 2015-08-19 福建省天大精诺信息有限公司 Single-pillar rough and finish machining integrated machine

Also Published As

Publication number Publication date
DE102015217600A1 (en) 2017-03-16
CN106938441A (en) 2017-07-11
DE102015217600B4 (en) 2020-02-20

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