WO2017067884A1 - An apparatus for dressing a grinding wheel - Google Patents
An apparatus for dressing a grinding wheel Download PDFInfo
- Publication number
- WO2017067884A1 WO2017067884A1 PCT/EP2016/074883 EP2016074883W WO2017067884A1 WO 2017067884 A1 WO2017067884 A1 WO 2017067884A1 EP 2016074883 W EP2016074883 W EP 2016074883W WO 2017067884 A1 WO2017067884 A1 WO 2017067884A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- grinding wheel
- dressing
- monitoring
- actuator
- dressing tool
- Prior art date
Links
Classifications
-
- 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
- B24B53/00—Devices or means for dressing or conditioning abrasive surfaces
- B24B53/06—Devices or means for dressing or conditioning abrasive surfaces of profiled abrasive wheels
- B24B53/08—Devices or means for dressing or conditioning abrasive surfaces of profiled abrasive wheels controlled by information means, e.g. patterns, templets, punched tapes or the like
-
- 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
- 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
- B24B49/003—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 involving acoustic 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
- B24B53/00—Devices or means for dressing or conditioning abrasive surfaces
- B24B53/005—Positioning devices for conditioning 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
- B24B53/00—Devices or means for dressing or conditioning abrasive surfaces
- B24B53/04—Devices or means for dressing or conditioning abrasive surfaces of cylindrical or conical surfaces on abrasive tools or wheels
Definitions
- the present invention refers to an apparatus for dressing a grinding wheel and a method for controlling an apparatus for dressing a grinding wheel.
- EP 0 876 875 A1 discloses a dressing apparatus having a CNC-control system.
- the dressing apparatus has a tool holder for accommodating a dressing tool, a CNC-controllable drive and a guide for moving the tool holder in such a manner, that the cutting position is movable in directions of at least two axes of a coordinate system .
- This dressing apparatus is used for the dressing of grinding wheels: Such grinding wheels are used for grinding several kinds of products.
- the quality of the created texture in particular deviates from the intended texture; improvements in the quality of the created texture are desirable.
- the invention has the object to create a texture of high quality on the surface of grinding wheels. This objective is achieved by an apparatus for dressing a grinding wheel taught by claim 1 and is achieved by a method for controlling an apparatus taught by claim 6. Preferred embodiments of the invention are defined by the sub-claims.
- the invention provides an apparatus for dressing a grinding wheel mounted thereon by creating structures on the surface of a, in particular cylindrical, grinding surface of the grinding wheel, the apparatus comprising:
- a dressing tool holder arranged for accommodating a dressing tool in a dressing position
- a controllable actuator for adjusting the position of the tool holder within the apparatus in at least one direction
- the apparatus comprises further means for monitoring an individual structure, created by the tool on the surface of the grinding wheel, and means for monitoring a circumferential position and/or the rotary speed of the grinding wheel, and means for controlling the actuator, adapted to control the actuator as a function of the monitored structure and the monitored circumferential position and/or rotary speed.
- the invention provides the possibility to control the synchronisation between the circumferential position of a grinding wheel and the position of the dressing tool .
- the actuator may be a piezoelectric actuator, comprising a dressing tool holder associated in its free extremity.
- a linear actuation of the actuator provides the contact between the dressing tool and the grinding wheel surface or a variation of the dressing depth .
- I n a predetermined circumferential position of the grinding wheel a contact between the dressing tool and the grinding wheel must be present to create the intended structures on the surface of the grinding wheel.
- the structures can be created accurately on the predetermined position on the surface of the grinding wheel. Further a quality control of the surface created on the grinding wheel surface is given by the correction of the rotation and by control of the dressing tool feed. This includes the possibility of mapping of the obtained texture for quality assurance.
- the creation of the structures thus depends on the circumferential position of the grinding wheel.
- structure small irregularities on the surface of the grinding wheels are meant. These irregularities causes cavities on surface of the workpiece, which is later treated by the grinding wheel. These cavities on the workpiece serve for accommodating small amounts of lubricant during use of the workpiece.
- the entirety of all structures on the grinding surface is called the “texture” of the grinding wheel surface within the scope of this invention .
- the means for monitoring a circumferential position and/or the rotary speed of the grinding wheel can be a magnetic sensor, in particular a hall-sensor. It is immaterial whether the sensor actually measures the rotary speed or the circumferential position over time, since the rotary speed can be calculated by differentiating the circumferential position and the circumferential position can be calculated by integrating the rotary speed.
- the sensor can be an inductive, capacitive, magnetic, photoelectrical or optical rotary speed or circumferential position sensor.
- an analysing unit adapted to reconstruct a structure created on the surface of the grinding wheel, based on the information provided by the means for monitoring an individual structure and the means for monitoring a circumferential position and/or the rotary speed of the grinding wheel.
- Said means use a synchronism reading signal which is provided by said means for monitoring a circumferential position and/or the speed. Additionally, the synchronism reading signal is used to generate and amplify an image of the created structure.
- the means for monitoring an individual structure are adapted to monitor the individual structure at the instant moment during creation of this respective structure.
- This allows a real time controlling of the actuator, since deviations at the time of creation can be immediately recognized and corrected .
- the tool actuation can thus be coordinated by the feedback, which is provided by said means at the instant moment during creation, thus correcting of errors and closer results of the initially desired structures can be obtained .
- the sensor for monitoring the structure can send the obtained signal to a structure representation system in real time.
- the structure reconstructed by the tool can be reconstructed based on historical data.
- the means for monitoring the structure comprise an acoustic sensor for monitoring the noise, which is generated during creation of the respective structure, the acoustic sensor is in particular attached to the dressing tool and/or the dressing tool holder.
- This sensor records the noise, comprising in particular ultrasonic sound, which is generated when the tool immerses into the surface of the grinding wheel.
- the recorded noise is thus a real time representation of the structure, created at the time of recording.
- the recorded noise can be correlated to details of structures which are deposited in a database. By correlating the recorded noise and thus the obtained structure with the monitored circumferential position, the position of the created structure can be observed and monitored.
- the means for controlling the actuator comprise numerical control means, enabling the input, compilation and transmission of information of machine commands without the intervention of an operator.
- the apparatus comprises further means for comparing the monitored structure with a given predetermined structure and based on the result of the comparison adjusting at least one control pulse for controlling the actuator of the dressing tool and/or a motor for driving the grinding wheel.
- Said means can be integrated in the means for controlling the actuator.
- FIG. 1 show a block diagram of an apparatus according to the invention.
- the apparatus 1 comprises a grinding wheel support 14 for rotatably supporting a grinding wheel 2 to be dressed within the apparatus 1 .
- a motor 20 drives the grinding wheel 2 into rotation.
- a magnetic circumferential position sensor 8 is provided to monitor the actual circumferential position 19 of grinding wheel 2. By differentiating the several monitored circumferential position values a rotary speed of the grinding wheel is obtained.
- a dressing tool 4 comprise a diamond tip 5, wh ich during the dressing process gets in contact with the surface 3 of the grinding wheel 2.
- the dressing tool 4 is supported by a dressing tool holder 6.
- the position of the dressing tool holder 6 can be manipulated by an actuator 7 in various directions. I n particular by varying the position of the dressing tool holder 6 in x-direction , the depth of immersion of the diamond tip 5 into the surface 3 of the grinding wheel 2 is adjusted .
- a control unit 1 0 provides control pulses 16 for the dressing tool actuator 7.
- the control unit 10 is provided with data concerning the predetermined surface 3 P , which has to be created on the grinding wheel 2.
- Several predetermined structures 1 1 are provided within these data. Synchronization with the actual circumferential position of the grinding wheel 2 is provided by the circumferential position signal 19 of the grinding wheel 2.
- An acoustic sensor 13 is provided for recording noise 1 8 occurring during immersion of the diamond tip 5 into the surface 3. Based on the immersion depth , the force, which is applied on the tip 5, the duration of the immersion and the area of the immersion , noises of different spectra 18 are generated . So when different structures are created on the surface noises of different frequencies and volumes, subsequently summarized under the term noise spectra 1 8, occur. A library of different noise spectra 18 is deposited in a database 1 5, along with details of structures 12 assigned thereto.
- a structure 12 can be determined , wh ich is similar to the structure which was created during the recording of the respective noise 18. This determination is performed by an analysing unit 9, wh ich has access to the data base 1 5. As a result the analysing unit 9 establishes an observed surface image 3 0 comprising the structures 12 as monitored .
- FIG. 1 shows in the observed surface 3 0 a structure 12', which deviates from the predetermined structures 1 1 . This indicates an undue wearout of the dressing tool 4.
- This wearout can be compensated by a respective change in the controlling of the actuator 7.
- the loss of diamond particles at the tip 5 can be compensated by an increased feed rate of the actuator 7 in x-direction .
- the apparatus and method according to the present invention provides the possibility of adapting the feed rate within a control circuit in real-time.
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BR112018007943A BR112018007943A2 (en) | 2015-10-21 | 2016-10-17 | apparatus for covering a polishing wheel, and method of controlling apparatus for covering a polishing wheel |
CN201680060260.5A CN108430698A (en) | 2015-10-21 | 2016-10-17 | Equipment for handling emery wheel |
US15/770,107 US20180311789A1 (en) | 2015-10-21 | 2016-10-17 | An apparatus for dressing a grinding wheel |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP15190814.2 | 2015-10-21 | ||
EP15190814.2A EP3159104A1 (en) | 2015-10-21 | 2015-10-21 | An apparatus for dressing a grinding wheel |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2017067884A1 true WO2017067884A1 (en) | 2017-04-27 |
Family
ID=54359978
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2016/074883 WO2017067884A1 (en) | 2015-10-21 | 2016-10-17 | An apparatus for dressing a grinding wheel |
Country Status (5)
Country | Link |
---|---|
US (1) | US20180311789A1 (en) |
EP (1) | EP3159104A1 (en) |
CN (1) | CN108430698A (en) |
BR (1) | BR112018007943A2 (en) |
WO (1) | WO2017067884A1 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11577365B2 (en) * | 2019-04-05 | 2023-02-14 | Honda Motor Co., Ltd. | Systems and methods of processing a rotatable assembly |
US11633825B2 (en) | 2020-02-06 | 2023-04-25 | Fives Landis Corp. | Acoustic crankpin location detection |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2007175815A (en) * | 2005-12-28 | 2007-07-12 | Jtekt Corp | Correction method and correction device for grinding wheel |
JP2007260880A (en) * | 2006-03-30 | 2007-10-11 | Jtekt Corp | Method of truing grinding wheel, and grinding machine |
EP2801441A1 (en) * | 2013-05-07 | 2014-11-12 | Jtekt Corporation | Grinding machine |
US20150258659A1 (en) * | 2014-03-17 | 2015-09-17 | Jtekt Corporation | Grinding wheel truing method and grinding machine |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL1005935C2 (en) | 1997-04-29 | 1998-11-02 | Albert Geuzinge | Zip off grinding wheels. |
CN103273425A (en) * | 2013-05-14 | 2013-09-04 | 东华大学 | CBN grinding wheel track finishing device |
-
2015
- 2015-10-21 EP EP15190814.2A patent/EP3159104A1/en not_active Withdrawn
-
2016
- 2016-10-17 WO PCT/EP2016/074883 patent/WO2017067884A1/en active Application Filing
- 2016-10-17 CN CN201680060260.5A patent/CN108430698A/en active Pending
- 2016-10-17 BR BR112018007943A patent/BR112018007943A2/en not_active Application Discontinuation
- 2016-10-17 US US15/770,107 patent/US20180311789A1/en not_active Abandoned
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2007175815A (en) * | 2005-12-28 | 2007-07-12 | Jtekt Corp | Correction method and correction device for grinding wheel |
JP2007260880A (en) * | 2006-03-30 | 2007-10-11 | Jtekt Corp | Method of truing grinding wheel, and grinding machine |
EP2801441A1 (en) * | 2013-05-07 | 2014-11-12 | Jtekt Corporation | Grinding machine |
US20150258659A1 (en) * | 2014-03-17 | 2015-09-17 | Jtekt Corporation | Grinding wheel truing method and grinding machine |
Also Published As
Publication number | Publication date |
---|---|
CN108430698A (en) | 2018-08-21 |
BR112018007943A2 (en) | 2018-10-30 |
EP3159104A1 (en) | 2017-04-26 |
US20180311789A1 (en) | 2018-11-01 |
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