CN103273423B - Grinding wheel grinding sound emission monitoring device - Google Patents
Grinding wheel grinding sound emission monitoring device Download PDFInfo
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- CN103273423B CN103273423B CN201310249723.0A CN201310249723A CN103273423B CN 103273423 B CN103273423 B CN 103273423B CN 201310249723 A CN201310249723 A CN 201310249723A CN 103273423 B CN103273423 B CN 103273423B
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- magnetic
- rotating shaft
- magnetic pole
- permanent magnet
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Abstract
The invention discloses a grinding wheel grinding sound emission monitoring device, and relates to a sound emission monitoring device. The grinding wheel grinding sound emission monitoring device comprises a locking flange, a magnetic rotation shaft, a shell, an annular magnetic pole, a permanent magnet, a magnetic slide plate, a limited block, an annular conical surface magnetic pole, a bevel gear, a handle, a retainer ring, a plug, an end cover, magnetorheological fluids, a sound emission sensor seat, a sound emission sensor and a detection circuit, the locking flange is locked with an external grinder grinding wheel, the left end of the magnetic rotation shaft is connected with the locking flange, the magnetic rotation shaft is provided with a hollow hole, the plug is arranged at an opening end of the hollow hole, the magnetorheological fluids are stored in the hollow hole, the hollow hole is communicated with the outer surface of the magnetic rotation shaft, the shell is sleeved on the magnetic rotation shaft, both the annular magnetic pole and the annular conical surface magnetic pole are positioned in the shell and are sleeved on the magnetic rotation shaft, the left end of the annular conical surface magnetic pole is connected with the magnetic slide plate, the left end of the magnetic slide plate is connected with the permanent magnet in a threaded manner, the right end of the annular conical surface magnetic pole is meshed with the bevel gear, and the detection circuit is arranged outside the shell and is electrically connected with the sound emission sensor.
Description
Technical field
The present invention relates to a kind of acoustic emission monitor(ing) device, especially relate to a kind of wheel grinding acoustic emission monitor(ing) device.
Background technology
Along with the development of modern science and technology, all size high-performance optical surface is widely used in military and civilian each field, existing manufacture level be difficult to meet this grow with each passing day qualitatively with quantitative demand.The low cost batch production of high quality optical element has become optics manufacturing industry problem in the urgent need to address.
Diamond wheel grinding is the main processing mode of optical element, based on the Dynamic Signal Feature extraction and recognition technology in wheel grinding process, carries out on-line monitoring and control to grinding state, is the effective way improving optical surface working (machining) efficiency.In grinding process, the elastic deformation etc. of the removal of emery wheel wear, workpiece material and emery wheel and workpiece, all can produce abundant acoustic emission signal, and acoustic emission signal directly to reflect the dynamic process amount that wheel grinding state changes.Acoustic emission signal decay is serious, and the installation site of sensor needs as far as possible near sound source.And, abundant information is comprised in acoustic emission signal, bang path is very large on its impact, wave impedance between bang path medium differs too conference and causes sensor to obtain signal, the change of sensor and sound source relative position and bang path, the acoustic emission signal gathered will be made to lack comparativity, follow-up sound emission signal characteristic is extracted and causes difficulty.
Grinding acoustic emission signal source is positioned at emery wheel and work piece contact zone, workpiece and workbench are installed calibrate AE sensor not only sound source Distance geometry bang path constantly change, and the interference of lathe miscellaneous part operational shock and contact surface friction can be subject to, true and reliable signal cannot be obtained.Should try one's best near signal source in calibrate AE sensor installation site, and relative position is fixed.The patent No. is that the utility model of CN96200753 proposes a kind of contactless liquid sound emission sensor structure, is arranged on the cool but nozzle for liquid of lathe, utilizes fluid dielectric coolant to transmit acoustic emission signal.This device is subject to cooling condition restriction, can only be used for wet-milling processing, and the signal collected can be subject to the interference of coolant rate and pressure.Current research work also has and piezoelectricity calibrate AE sensor is arranged on circumference of emery wheel carries out grinding acoustic emission monitor(ing), and this mode can collect the acoustic emission signal of high s/n ratio, but needs to change grinding wheel structure, and versatility is poor.(see document B.Varghese.In-process monitoring of truing using asensor integrated diamond grinding wheel, Transactions of the North American ManufacturingResearch Institute of SME, 2002:295-302.)
Summary of the invention
The object of the present invention is to provide a kind of wheel grinding acoustic emission monitor(ing) device that structure is simple, can realize the collection of reliable wheel grinding acoustic emission signal.
The present invention is provided with locking flange, magnetic rotating shaft, housing, annular magnetic pole, permanent magnet, magnetic slideway dish, limited block, circular cone magnetic pole, bevel gear, handle, back-up ring, blocking, end cap, magnetic flow liquid, calibrate AE sensor seat, calibrate AE sensor and testing circuit;
Described locking flange and outside grinder wheel are locked, magnetic rotating shaft left end and locking Flange joint, and magnetic rotating shaft is provided with hollow hole, and hollow hole openend is provided with blocking, and hollow hole fills magnetic flow liquid, and hollow hole is communicated with by radial hole with magnetic rotating shaft outer surface; Housing is enclosed within magnetic rotating shaft, and housing left end coordinates with magnetic axis of rotation, and housing right-hand member and back-up ring are connected, and shield ring sleeve is in magnetic rotating shaft and coordinate with magnetic axis of rotation; Annular magnetic pole and circular cone magnetic pole are positioned at housing and are all sheathed in magnetic rotating shaft, annular magnetic pole centre bore and be equipped with magnetic flow liquid between circular cone pole center hole and magnetic rotating shaft outer surface and assemble gap, circular cone magnetic pole left end is connected with magnetic slideway dish, magnetic slideway is faced left to hold and is spirally connected with permanent magnet, circular cone magnetic pole right-hand member engages with bevel gear, and handle is located at bevel gear and is gone up and expose housing; Calibrate AE sensor seat is located on housing, and calibrate AE sensor is located in calibrate AE sensor seat, and testing circuit is located at hull outside and is electrically connected with calibrate AE sensor.
Be rotatably assorted preferably by self-lubricating bearing between described housing left end and magnetic rotating shaft; Be rotatably assorted preferably by self-lubricating bearing between described back-up ring and magnetic rotating shaft.
Described permanent magnet is preferably made up of multiple permanent magnet blocks, and each permanent magnet blocks is circumferentially distributed on magnetic slideway dish, and each permanent magnet blocks is equipped with steel sole plate, is provided with flat thread bottom steel sole plate; Described magnetic slideway end of facing left is provided with centripetal uniform radial slot, is provided with flat thread in radial slot, and the steel sole plate of each permanent magnet blocks is all spirally connected by the flat thread in the radial slot of flat thread and magnetic slideway dish.
The centre bore of described annular magnetic pole and circular cone magnetic pole is preferably equipped with tapered-body pole tooth.
Described calibrate AE sensor preferably adopts piezoelectric type calibrate AE sensor.
Compared with existing acoustic emission monitor(ing) device, operation principle of the present invention and beneficial effect as follows:
The present invention is arranged on grinder wheel axle head, first bevel gear is rotated counterclockwise by handle, coordinated by flat thread, permanent magnet is made to move apart from farthest, the center of circle, start makes grinding wheel spindle rotate, the magnetic flow liquid that the hollow hole of magnetic rotating shaft is deposited, in rotating shaft rotary course, due to the effect of centrifugal force, arrives the gap between annular magnetic pole and magnetic rotating shaft and the gap between circular cone magnetic pole and magnetic rotating shaft along aperture.Then to be turned clockwise bevel gear by handle, when making permanent magnet arrive nearest home position, permanent magnet with two magnetic poles about annular magnetic pole and circular cone magnetic pole for bridge, the magnetic line of force, by magnetic rotating shaft surface and magnetic rotating shaft and the gap between annular magnetic pole and circular cone magnetic pole, forms closed magnetic loop.Maximum at the tapered-body pole tooth marginal portion magnetic flux of the endoporus of two magnetic poles, assemble magnetic flow liquid, magnetic flow liquid is surface presentation crest phenomenon in high-intensity magnetic field, tightly contact magnetic rotating shaft and annular magnetic pole and circular cone magnetic pole, the magnetic flow liquid being gathered in tooth edge, pole forms the magnetorheological ring of a series of " o " shape of twisted rotary shaft, makes to keep reliable liquid comes into contact between magnetic rotating shaft and magnetic pole.
Calibrate AE sensor surface being applied couplant is pressed on surface of shell.Signaling path from grinding area to calibrate AE sensor is constant, and medium is solid or liquid, solid and liquid wave impedance close, wave reflection rate on medium interface can be effectively reduced, reduce the decay of acoustic emission signal, improve signal to noise ratio.
As can be seen here, the present invention has following outstanding advantages:
1, bang path is fixed.The present invention is arranged on grinding wheel spindle axle head, constant all the time with grinding area relative position, compares and is arranged on workbench or fixture, effectively can reduce the uncertainty that relative position constantly changes the sound emission signal characteristic caused.
2, signal to noise ratio is high.When permanent magnet is near home position, permanent magnet is by two magnetic poles about annular magnetic pole and circular cone magnetic pole, make magnetic rotating shaft surface and and magnetic pole between gap location there is stronger magnetic field, the design of the equidistant tapered-body pole tooth of magnetic pole bore area, make magnetic flow liquid distribution in rule in the gap of magnetic rotating shaft and magnetic pole, magnetic flow liquid presents surperficial crest phenomenon in high-intensity magnetic field, there is very high shear yield strength, thus make magnetic rotating shaft form stable contact with magnetic pole by the magnetorheological ring of " o " shape that multiple rule distributes, get rid of the gap between rotor and stator, the reflection loss of the acoustic emission wave that minimizing causes due to Transfer Medium wave impedance difference.Meanwhile, device selects self-lubricating bearing support housing, and the noise that between rotor and stator, sliding friction is introduced is much smaller than roller bearings.
3, easy for installation.This device forms primarily of two parts, first locking flange is substituted the original locking nut of lathe, installs and lock emery wheel.The agent structure of the constituent apparatus such as magnetic rotating shaft and housing, its flange end is bolted with locking flange, and contact surface daubing coupling agent eliminates contact surface space, reduces the reflection loss of acoustic emission signal.
4, easy to operate.Permanent magnet radial position can be changed by knob, thus change magnetic field size, control the mobility of magnetic flow liquid.During low-intensity magnetic field, magnetic flow liquid flowing property is good, opens end cap and blocking, can add magnetic flow liquid very easily, supplements loss, and centrifugal action can be utilized to make it fully enter gap between magnetic rotating shaft and magnetic pole.After forming high-intensity magnetic field, magnetic flow liquid viscosity increases, and has and has very high shear yield strength, guarantee close contact.
Accompanying drawing explanation
Fig. 1 is the structural representation of the embodiment of the present invention.
Fig. 2 is magnetic slideway dish and the magnet structure schematic diagram of the embodiment of the present invention.
Detailed description of the invention
See Fig. 1 and 2, the embodiment of the present invention is provided with locking flange 1, magnetic rotating shaft 2, housing 3, annular magnetic pole 4,6 pieces of permanent magnet blocks 5, magnetic slideway dish 6, limited block 7, circular cone magnetic pole 8, bevel gear 9, handle 10, back-up ring 11, blocking 14, end cap 15, magnetic flow liquid 16, calibrate AE sensor seat 18, calibrate AE sensor (not shown in FIG.) and testing circuit (not shown in FIG.).
Locking flange 1 is locked with outside grinder wheel.Magnetic rotating shaft 2 left end is connected with locking flange 1, and magnetic rotating shaft 2 is provided with hollow hole 21, and hollow hole 21 openend is provided with blocking 14, and hollow hole 21 fills magnetic flow liquid, and hollow hole 21 is communicated with by 4 radial holes 22 with magnetic rotating shaft 2 outer surface.Housing 3 is enclosed within magnetic rotating shaft 2, and housing 3 left end and magnetic rotating shaft 2 are rotatably assorted by self-lubricating bearing 13, and housing 3 right-hand member and back-up ring 11 are connected, and back-up ring 11 to be enclosed within magnetic rotating shaft 2 and to be rotatably assorted by self-lubricating bearing 13 with magnetic rotating shaft 2; Annular magnetic pole 4 and circular cone magnetic pole 8 are positioned at housing 3 and are all sheathed in magnetic rotating shaft 2, annular magnetic pole 4 centre bore and circular cone magnetic pole 8 centre bore are equipped with tapered-body pole tooth, form magnetic flow liquid between tapered-body pole tooth and magnetic rotating shaft 2 outer surface and assemble gap (in Fig. 1, black represents magnetic flow liquid), circular cone magnetic pole 8 left end is connected with magnetic slideway dish 6, magnetic slideway dish 6 left end and 6 pieces of permanent magnet blocks 5 are spirally connected, each permanent magnet blocks 5 is circumferentially distributed on magnetic slideway dish 6, each permanent magnet blocks 5 is equipped with steel sole plate, is provided with flat thread bottom steel sole plate.Described magnetic slideway dish 6 left side is provided with 6 centripetal uniform radial slots 61, flat thread is provided with in radial slot 61, the steel sole plate of permanent magnet blocks 5 is arranged in radial slot 61, and the steel sole plate of permanent magnet blocks 5 is all spirally connected by the flat thread in the radial slot 61 of flat thread and magnetic slideway dish 6.The two ends of each radial slot 61 of magnetic slideway dish 6 are provided with limited block 7, and magnetic slideway dish 6 and circular cone magnetic pole 8 are connected as a single entity by limited block 7, and limited block 7 is spacing for permanent magnet blocks 5 radial displacement.Empty frame table in Fig. 2 shows that permanent magnet blocks 5 can move radially.
Circular cone magnetic pole 8 right-hand member engages with bevel gear 9, and handle 10 to be located on bevel gear 9 and to be exposed housing 3.Calibrate AE sensor seat 18 is located on housing 3, and piezoelectric type calibrate AE sensor is located in calibrate AE sensor seat 18, and testing circuit is located at housing 3 outside and is electrically connected with calibrate AE sensor.
Rotary handle 10 can rotating cone gear 9, and circular cone magnetic pole 8 is rotated, thus makes the synchronous radial motion of each permanent magnet blocks 5.When turning clockwise, each permanent magnet blocks 5 is drawn close to the center of circle, then synchronous away from the center of circle counterclockwise.
In FIG, mark 12 is pad, 17 is O RunddichtringO.
Claims (6)
1. a wheel grinding acoustic emission monitor(ing) device, is characterized in that: be provided with locking flange, magnetic rotating shaft, housing, annular magnetic pole, permanent magnet, magnetic slideway dish, limited block, circular cone magnetic pole, bevel gear, handle, back-up ring, blocking, end cap, magnetic flow liquid, calibrate AE sensor seat, calibrate AE sensor and testing circuit;
Locking flange and outside grinder wheel are locked, magnetic rotating shaft left end and locking Flange joint, and magnetic rotating shaft is provided with hollow hole, and hollow hole openend is provided with blocking, and hollow hole fills magnetic flow liquid, and hollow hole is communicated with by radial hole with magnetic rotating shaft outer surface; Housing is enclosed within magnetic rotating shaft, and housing left end coordinates with magnetic axis of rotation, and housing right-hand member and back-up ring are connected, and shield ring sleeve is in magnetic rotating shaft and coordinate with magnetic axis of rotation; Annular magnetic pole and circular cone magnetic pole are positioned at housing and are all sheathed in magnetic rotating shaft, annular magnetic pole centre bore and be equipped with magnetic flow liquid between circular cone pole center hole and magnetic rotating shaft outer surface and assemble gap, circular cone magnetic pole left end is connected with magnetic slideway dish, magnetic slideway is faced left to hold and is spirally connected with permanent magnet, circular cone magnetic pole right-hand member engages with bevel gear, and handle is located at bevel gear and is gone up and expose housing; Calibrate AE sensor seat is located on housing, and calibrate AE sensor is located in calibrate AE sensor seat, and testing circuit is located at hull outside and is electrically connected with calibrate AE sensor.
2. a kind of wheel grinding acoustic emission monitor(ing) device as claimed in claim 1, be is characterized in that: be all rotatably assorted by self-lubricating bearing between described housing left end and magnetic rotating shaft.
3. a kind of wheel grinding acoustic emission monitor(ing) device as claimed in claim 1, be is characterized in that: be rotatably assorted by self-lubricating bearing between described back-up ring and magnetic rotating shaft.
4. a kind of wheel grinding acoustic emission monitor(ing) device as claimed in claim 1, it is characterized in that: described permanent magnet is made up of multiple permanent magnet blocks, each permanent magnet blocks is circumferentially distributed on magnetic slideway dish, and each permanent magnet blocks is equipped with steel sole plate, is provided with flat thread bottom steel sole plate.
5. a kind of wheel grinding acoustic emission monitor(ing) device as claimed in claim 1, it is characterized in that: described magnetic slideway is faced left to hold and is provided with centripetal uniform radial slot, be provided with flat thread in radial slot, the steel sole plate of each permanent magnet blocks is all spirally connected by the flat thread in the radial slot of flat thread and magnetic slideway dish.
6. a kind of wheel grinding acoustic emission monitor(ing) device as claimed in claim 1, is characterized in that: the centre bore of described annular magnetic pole and circular cone magnetic pole is equipped with tapered-body pole tooth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310249723.0A CN103273423B (en) | 2013-06-21 | 2013-06-21 | Grinding wheel grinding sound emission monitoring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310249723.0A CN103273423B (en) | 2013-06-21 | 2013-06-21 | Grinding wheel grinding sound emission monitoring device |
Publications (2)
| Publication Number | Publication Date |
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| CN103273423A CN103273423A (en) | 2013-09-04 |
| CN103273423B true CN103273423B (en) | 2015-03-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310249723.0A Expired - Fee Related CN103273423B (en) | 2013-06-21 | 2013-06-21 | Grinding wheel grinding sound emission monitoring device |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104772664B (en) * | 2015-04-30 | 2017-04-19 | 北京德铭纳精密机械有限公司 | Grinding device for PCD/CBN cutter |
| JP6912794B2 (en) * | 2016-10-26 | 2021-08-04 | 株式会社シギヤ精機製作所 | Grinder |
| CN109079662B (en) * | 2018-10-11 | 2020-05-15 | 长沙理工大学 | Single-point diamond dressing grinding wheel device based on acoustic emission on-line monitoring |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19826422A1 (en) * | 1998-06-05 | 1999-12-09 | Bernd Woop | Combined sensor system for rail vehicle wheels |
| US6615149B1 (en) * | 1998-12-10 | 2003-09-02 | Rosemount Inc. | Spectral diagnostics in a magnetic flow meter |
| CN102410847A (en) * | 2010-08-11 | 2012-04-11 | 罗斯蒙德公司 | Noise detection and avoidance |
| CN103090959A (en) * | 2013-02-27 | 2013-05-08 | 重庆绿色智能技术研究院 | Acoustic velocity measurement method and device of magnetorheological fluid ultrasonic wave |
-
2013
- 2013-06-21 CN CN201310249723.0A patent/CN103273423B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19826422A1 (en) * | 1998-06-05 | 1999-12-09 | Bernd Woop | Combined sensor system for rail vehicle wheels |
| US6615149B1 (en) * | 1998-12-10 | 2003-09-02 | Rosemount Inc. | Spectral diagnostics in a magnetic flow meter |
| CN102410847A (en) * | 2010-08-11 | 2012-04-11 | 罗斯蒙德公司 | Noise detection and avoidance |
| CN103090959A (en) * | 2013-02-27 | 2013-05-08 | 重庆绿色智能技术研究院 | Acoustic velocity measurement method and device of magnetorheological fluid ultrasonic wave |
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| CN103273423A (en) | 2013-09-04 |
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Granted publication date: 20150311 Termination date: 20210621 |