CN109702648A - A kind of grinding wheel load phenomena in-situ monitor system and method - Google Patents
A kind of grinding wheel load phenomena in-situ monitor system and method Download PDFInfo
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- CN109702648A CN109702648A CN201910136096.7A CN201910136096A CN109702648A CN 109702648 A CN109702648 A CN 109702648A CN 201910136096 A CN201910136096 A CN 201910136096A CN 109702648 A CN109702648 A CN 109702648A
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Abstract
The present invention relates to a kind of grinding wheel load phenomena in-situ monitor system and methods, including acoustic emission signal acquisition device, using a fluid-type acoustic emission sensor；Acoustic emission signal processing system, including characteristic parameter extraction module and judgment module；Vision inspection apparatus, using a CCD high-definition camera；Image processing system, including gray value extraction module, area calculation module and load factor computing module；Diagnostic system, including a judgment module and alarm module judge whether to need to alarm and modify grinding wheel according to load factor.The present invention also provides a kind of grinding wheel load phenomena in-situ monitor methods: acquiring acoustic emission signal first with fluid-type acoustic emission sensor, secondly whether load phenomena is generated according to the multilevel iudge of characteristics of Acoustic Emission parameter and threshold value, if, then open CCD high-definition camera shooting Configuration of Grinding-wheel Surface, then surface topography image is handled, load area area and load factor are obtained, is finally judged whether to need alarm and profile shifted gear according to load factor.
Description
Technical field
The present invention relates to accurate grinding processing technique field more particularly to a kind of grinding wheel load phenomena in-situ monitor system and sides
Method.
Background technique
With the development of high-speed, high precision grinding technique, grinding is gradually applied to the various processing spaces such as accurate, high-accuracy
It closes, and is related to the every field of machining.Grinding wheel is as most important tool in grinding and grinding machine, the surface of grinding wheel
Situation plays an important role to grinding performance.In process easily because workpieces processing quality is softer, and lead to grinding wheel
Load phenomena, i.e., the talus accumulation separated in the porous space between grinding wheel abrasive grain are generated, this phenomenon can generate the sand of blunt
Crystal grain is taken turns, causes grinding wheel cutting power to be degenerated, generates excessive friction and vibration；The service life for reducing grinding wheel, improves
Grinding force and grinding temperature.Therefore, grinding wheel identification of load phenomena in grinding process is very crucial and necessary.
Document [1] (Chien-Sheng Liu.Yu-An Li.Evaluation of grinding wheel loading
phenomena by using acoustic emission signals.The International Journal of
Advanced Manufacturing Technology (2018) 99:1109-1117.) in mention it is a kind of by acoustic emission signal
Process integration measurement, off-line digital image procossing and workpiece surface roughness measurement combine, and utilize the certain of acoustic emission signal
The measurement method of characteristic parameter characterization and the load phenomena of evaluation grinding wheel.The measurement method can provide one from acoustic emission signal
A quantitative target evaluates grinding wheel load phenomena, is combined with off-line digital image procossing and workpiece surface roughness measurement to sentence
Whether grinding wheel load phenomena detected by disconnected acoustic emission signal is accurate, does not tie acoustic emission detection and vision-based detection well
Altogether, grinding wheel load phenomena finally or is individually evaluated with the characteristic parameter of acoustic emission signal, evaluation result is not intuitive.
And use off-line digital image procossing, the unloading and complex installation process of grinding wheel, inefficiency.Therefore, the technology of this field
Personnel are dedicated to developing a kind of grinding wheel load phenomena in-situ monitor system and method.
Summary of the invention
In view of the drawbacks described above of the prior art, the technical problem to be solved by the present invention is to the processing of prior art grinding wheel load phenomena
Predominantly off-line form, speed is slow, and monitoring process is relatively complicated, and intelligence degree is not high, can not by grinding wheel load phenomena into
Row quantization.
To achieve the above object, the present invention provides a kind of grinding wheel load phenomena in-situ monitor system and method, realize that grinding wheel is negative
The in-situ monitor for carrying phenomenon is quantified grinding wheel load phenomena, specifically using the ratio of load area area and total area
Technical solution it is as follows:
A kind of grinding wheel load phenomena in-situ monitor system includes:
Acoustic emission signal acquisition device, including a fluid-type acoustic emission sensor are mounted at grinding wheel processing cold for replacing
But liquid spray head, for acquiring generated acoustic emission signal in grinding wheel operation process；
Acoustic emission signal processing system, including characteristic parameter extraction module and judgment module, for believing collected sound emission
It number is handled, in order to find generated grinding wheel load phenomena in grinding wheel operation process immediately；
Vision inspection apparatus, including a CCD high-definition camera are vertically mounted on above stone face, for acquiring Buddha's warrior attendant
The surface topography of stone sand wheel；
Image processing system, including gray value extraction module, area calculation module and load factor computing module, for handling acquisition
The surface topography image of the skive arrived determines the distribution feelings of diamond abrasive grain and metal-loaded fragment according to gray value
Condition further determines that image medium plain emery wheel generates the region of load phenomena, and quantifies to obtain load factor；
Diagnostic system, including a judgment module and alarm module, according to the region and load factor for generating load phenomena, with determination
Whether need to alarm and modify grinding wheel.
Further, the fluid-type acoustic emission sensor uses two-fold chip fluid-type acoustic emission sensor, for replacing
Coolant liquid spray head, coolant liquid are sprayed from fluid-type acoustic emission sensor, and acoustic emission signal is passed along the direction opposite with coolant liquid
Into fluid-type acoustic emission sensor.
Further, the CCD high-definition camera, resolution ratio are not less than 2048 × 2048, and Pixel Dimensions are not less than 3.88 μm
×3.88μm。
Another aspect of the present invention provides a kind of grinding wheel load phenomena in-situ monitor method based on described device, comprising steps of
Step 1: generated acoustic emission signal in acquisition grinding wheel operation process；
Step 2: the root mean square for extracting acoustic emission signal is compared with threshold value, judges that grinding wheel whether there is load phenomena, if
Root mean square is greater than threshold value, then shuts down, jump to step 3, otherwise returns to step 1；
Step 3: open CCD camera, with grinding wheel stop position be 0 °, rotate clockwise, respectively choose 0 ° of grinding wheel, 90 °, 180 ° with
And the surface topography of 270 ° of four positions shooting skives；
Step 4: converting gray level image for the surface topography image of the skive taken, and carry out mentioning for gray value
It takes, by the difference of diamond abrasive grain and metal-loaded fragment gray value, the two is distinguished, obtain diamond abrasive grain and add
The distribution situation for carrying metal fragment further determines that grinding wheel generates the region of load phenomena, and according to gray value computational load area
Domain area and load area area account for the ratio of image total area, are then averaged to the ratio of 4 width pictures, obtain totality
Load factor；
Step 5: according to load area and load factor, to determine the need for alarming and modify grinding wheel, if load factor is greater than
30%, then profile shifted gear, if load factor less than 15%, then continues to be switched on, jumps to step 1, if load factor 15%~
Between 30%, then continue to be switched on, while open alarming device, to remind operator to pay close attention to work pieces process situation.
Specifically, threshold value in the step 2, in particular to generating load according to repeated detection grinding wheel in actual processing
The case where phenomenon and determination.
Specifically, the step 3 need to clear up the greasy dirt of wheel face before opening CCD camera and taking pictures.
The invention has the following advantages over the prior art:
(1) on-position measure of grinding wheel may be implemented in the grinding wheel load phenomena in-situ monitor device that the present invention designs, and avoids grinding wheel
Unloading is cumbersome with installation, and intelligence degree is high, and conversion speed is fast.
(2) the grinding wheel load phenomena on-position measure method flow that the present invention designs is simple, visual result, by acoustic emission detection and view
Feel that detection is combined together well, grinding wheel load phenomena can be quantified, to determine the need for alarm and modify sand
Wheel.
Detailed description of the invention
Illustrate implementation of the invention in order to clearer, the required attached drawing used in the description embodiment of the present invention will be made below
Simple declaration.
Fig. 1 is the grinding wheel load phenomena in-situ monitor system schematic of the embodiment of the present invention.
Fig. 2 is the method flow diagram of the grinding wheel load phenomena in-situ monitor system of the embodiment of the present invention.
It is as shown in the figure: 1- grinding wheel spindle；2- grinding wheel；3- balancing head；4- workpiece to be processed；5- fluid-type acoustic emission sensor；6-CCD
High-definition camera；7- Acoustic emission signal processing system；8- image processing system；9- diagnostic system.
Specific embodiment
To be best understood from the present invention, the present invention is described further with reference to the accompanying drawings and examples, but the present invention wants
The range of protection is asked to be not limited to the range of embodiment expression.
A kind of 2 load phenomena in-situ monitor system of grinding wheel, comprising:
Acoustic emission signal acquisition device, including a fluid-type acoustic emission sensor 5 are mounted on and are used to replace at 2 processing of grinding wheel
Coolant liquid spray head, for acquiring generated acoustic emission signal in 2 operation process of grinding wheel；
Acoustic emission signal processing system 7, including characteristic parameter extraction module and judgment module, for believing collected sound emission
It number is handled, in order to find generated 2 load phenomena of grinding wheel in 2 operation process of grinding wheel immediately；
Vision inspection apparatus, including a CCD high-definition camera 6 are vertically mounted on above 2 working face of grinding wheel, for acquiring gold
The surface topography of hard rock grinding wheel 2；
Image processing system 8, including gray value extraction module, area calculation module and load factor computing module are adopted for handling
The surface topography image of the skive 2 collected, the distribution of diamond abrasive grain and metal-loaded fragment is determined according to gray value
Situation further determines that image medium plain emery wheel 2 generates the region of load phenomena, and quantifies to obtain load factor；
Diagnostic system 9, including a judgment module and alarm module, according to the region and load factor for generating load phenomena, with true
It is fixed whether to need to alarm and modify grinding wheel 2.
In the present embodiment, the fluid-type acoustic emission sensor 5 uses two-fold chip fluid-type acoustic emission sensor 5, is used to
Instead of coolant liquid spray head, coolant liquid is sprayed from fluid-type acoustic emission sensor 5, and acoustic emission signal is along the side opposite with coolant liquid
To passing in fluid-type acoustic emission sensor 5.
In the present embodiment, the CCD high-definition camera 6, resolution ratio is not less than 2048 × 2048, and Pixel Dimensions are not less than 3.88
μm×3.88μm。
Another aspect of the present invention provides a kind of 2 load phenomena in-situ monitor method of grinding wheel based on described device, comprising steps of
Step 1: generated acoustic emission signal in acquisition 2 operation process of grinding wheel；
Step 2: the root mean square for extracting acoustic emission signal is compared with threshold value, judges that grinding wheel 2 whether there is load phenomena, if
Root mean square is greater than threshold value, then shuts down, jump to step 3, otherwise returns to step 1；
Step 3: CCD camera is opened, with 2 stop position of grinding wheel for 0 °, is rotated clockwise, respectively 20 ° of grinding wheel of selection, 90 °,
The surface topography of 180 ° and 270 ° four positions shooting skives 2；
Step 4: converting gray level image for the surface topography image of the skive 2 taken, and carry out mentioning for gray value
It takes, by the difference of diamond abrasive grain and metal-loaded fragment gray value, the two is distinguished, obtain diamond abrasive grain and add
The distribution situation for carrying metal fragment further determines that grinding wheel 2 generates the region of load phenomena, and according to gray value computational load area
Domain area and load area area account for the ratio of image total area, are then averaged to the ratio of 4 width pictures, obtain totality
Load factor；
Step 5: according to load area and load factor, to determine the need for alarming and modify grinding wheel 2, if load factor is greater than
30%, then profile shifted gear, if load factor less than 15%, then continues to be switched on, jumps to step 1, if load factor 15%~
Between 30%, then continue to be switched on, while open alarming device, to remind operator to pay close attention to work pieces process situation.
Specifically, threshold value in the step 2, in particular to being generated in actual processing according to repeated detection grinding wheel 2 negative
The case where carrying phenomenon and determination.
Specifically, the step 3 need to clear up the greasy dirt on 2 surface of grinding wheel before opening CCD camera and taking pictures.
The above embodiment of the present invention be only rather than be to implementation of the invention to clearly illustrate example of the present invention
The restriction of mode.For the those of ordinary skill in the field, can also make on the basis of the above description it is other not
With the variation or variation of form.There is no necessity and possibility to exhaust all the enbodiments.It is all in spirit of the invention and
Made any modifications, equivalent replacements, and improvements etc. within principle, should be included in the claims in the present invention protection scope it
It is interior.
Claims (6)
1. a kind of grinding wheel load phenomena in-situ monitor system characterized by comprising
Acoustic emission signal acquisition device, including a fluid-type acoustic emission sensor are mounted at grinding wheel processing cold for replacing
But liquid spray head, for acquiring generated acoustic emission signal in grinding wheel operation process；
Acoustic emission signal processing system, including characteristic parameter extraction module and judgment module, for believing collected sound emission
It number is handled, in order to find generated grinding wheel load phenomena in grinding wheel operation process immediately；
Vision inspection apparatus, including a CCD high-definition camera are vertically mounted on above stone face, for acquiring Buddha's warrior attendant
The surface topography of stone sand wheel；
Image processing system, including gray value extraction module, area calculation module and load factor computing module, for handling acquisition
The surface topography image of the skive arrived determines the distribution feelings of diamond abrasive grain and metal-loaded fragment according to gray value
Condition further determines that image medium plain emery wheel generates the region of load phenomena, and quantifies to obtain load factor；
Diagnostic system, including a judgment module and alarm module, according to the region and load factor for generating load phenomena, with determination
Whether need to alarm and modify grinding wheel.
2. grinding wheel load phenomena in-situ monitor system according to claim 1, which is characterized in that the fluid-type sound hair
Sensor is penetrated using two-fold chip fluid-type acoustic emission sensor, is used to replace coolant liquid spray head, coolant liquid is sent out from fluid-type sound
It penetrates in sensor and sprays, acoustic emission signal passes in fluid-type acoustic emission sensor along the direction opposite with coolant liquid.
3. grinding wheel load phenomena in-situ monitor system according to claim 1, which is characterized in that the CCD high definition is taken the photograph
As head, resolution ratio is not less than 2048 × 2048, and Pixel Dimensions are not less than 3.88 μm of 3.88 μ m.
4. a kind of grinding wheel load phenomena in-situ monitor method, which is characterized in that comprising steps of
Step (1): generated acoustic emission signal in acquisition grinding wheel operation process；
Step (2): the root mean square for extracting acoustic emission signal is compared with threshold value, judges grinding wheel with the presence or absence of load phenomena, vacation
It if root mean square is greater than threshold value, then shuts down, jumps to step (3), otherwise return to step (1)；
Step (3): opening CCD camera, with grinding wheel stop position for 0 °, rotates clockwise, and chooses 0 ° of grinding wheel, 90 °, 180 ° respectively
And the surface topography of 270 ° of four positions shooting skives；
Step (4): gray level image is converted by the surface topography image of the skive taken, and carries out mentioning for gray value
It takes, by the difference of diamond abrasive grain and metal-loaded fragment gray value, the two is distinguished, obtain diamond abrasive grain and add
The distribution situation for carrying metal fragment further determines that grinding wheel generates the region of load phenomena, and according to gray value computational load area
Domain area and load area area account for the ratio of image total area, are then averaged to the ratio of 4 width pictures, obtain totality
Load factor；
Step (5): according to load area and load factor, to determine the need for alarming and modify grinding wheel, if load factor is greater than
30%, then profile shifted gear jumps to step (1) if load factor less than 15%, then continues to be switched on, if load factor is 15%
Between~30%, then continue to be switched on, while open alarming device, to remind operator to pay close attention to work pieces process situation.
5. grinding wheel load phenomena in-situ monitor method according to claim 4, which is characterized in that in the step (2)
Threshold value, in particular to determination the case where according to repeated detection grinding wheel generate load phenomena in actual processing.
6. grinding wheel load phenomena in-situ monitor method according to claim 4, which is characterized in that the step (3) exists
Before unlatching CCD camera is taken pictures, the greasy dirt of wheel face need to be cleared up.
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| CN111687749A (en) * | 2020-06-02 | 2020-09-22 | 宁夏巨能机器人股份有限公司 | Data processing system for man-machine cooperation polishing system and processing method thereof |
| CN115338709A (en) * | 2022-10-18 | 2022-11-15 | 徐州艾奇川自动化设备有限公司 | Numerical control machining intelligent monitoring control system based on industrial intelligence |
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