CN202147217U - Monitoring system for detecting machining states of grinding machine - Google Patents
Monitoring system for detecting machining states of grinding machine Download PDFInfo
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- CN202147217U CN202147217U CN201120222090U CN201120222090U CN202147217U CN 202147217 U CN202147217 U CN 202147217U CN 201120222090 U CN201120222090 U CN 201120222090U CN 201120222090 U CN201120222090 U CN 201120222090U CN 202147217 U CN202147217 U CN 202147217U
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Abstract
A monitoring system for detecting machining states of a grinding machine comprises a numerical control system of the numerical-control grinding machine, a sonar sensor, an acoustic emission detecting system and a PLC (programmable logic control) system. The sonar sensor receives sonar signals transmitted when the numerical-control grinding machine machines a workpiece, the sonar signals are converted into electric signals and transmitted to the acoustic emission detecting system, the acoustic emission detecting system transmits converted RS232 communication protocol signals to the numerical control system of the numerical-control grinding machine, the signals are displayed on a screen in a dynamic waveform manner by the aid of the numerical control system, the acoustic emission detecting system transmits converted PROFIBUS communication protocol signals to the PLC system, the PLC system transmits instruction signals to the numerical control system, and the numerical control system controls parts on the numerical-control grinding machine to execute corresponding actions according to the instruction signals. The monitoring system for detecting machining states of the grinding machine can monitor a total machining process of the grinding machine, and has the functions of visualizing a grinding process, preventing collision and eliminating idle running.
Description
Technical field
The utility model relates to a kind of monitoring system of machining state, particularly relates to a kind of monitoring system that detects the grinding machine machining state.
Background technology
Workpiece calibration mechanism commonly used on the lathe is a contact static measurement structure.For example using Britain Renishaw measurement mechanism, is that touch switch amount signal is reached digital control system.Handle by digital control system then.This measurement mechanism is applicable to static measurements such as lathe.And, adopt this measurement mechanism can have a series of problem for grinding machine, need rotation like workpiece in the measuring process and emery wheel; The abrasion of grinding wheel amount is bigger, and each measurement needs compensation and measures problems such as cumbersome.
In the prior art: documents 1: a kind of grinding machine self-adaptation control method and system (number of patent application is 200810012955.3) are provided.It mainly discloses a kind of method and system that utilizes the sound wave controlled grinding machine, and this system is based on a kind of application of non-Digit Control Machine Tool, and what signal and communication adopted is ad hoc mode, the inapplicable numerically control grinder of this system.
Documents 2: a kind of emery wheel micro-precision finishing tool setting device (number of patent application is 200620134000.1) is provided.It mainly discloses a kind of sound wave that utilizes and has carried out emery wheel micro-precision finishing tool setting device.This device has mainly been developed a kind of device in lathe execution first being processed realization tool setting, and is also inapplicable for the monitoring of numerically control grinder in process.
Summary of the invention
The purpose of the utility model provides a kind of grinding machine (numerically control grinder) that is used to have digital control system, in the grinding machine process, under the grinding state, monitors, and has the monitoring system of the anticollision and the idle running that disappears.
The utility model provides a kind of monitoring system that detects the grinding machine machining state in order to reach above-mentioned purpose.It comprises the digital control system of numerically control grinder, sonar sensor, acoustic emission detection system and PLC system; Said sonar sensor receives numerically control grinder and adds the sonar signal that sends man-hour for workpiece, and converts the sonar signal that it receives to the signal of telecommunication and be sent in the acoustic emission detection system; Acoustic emission detection system converts the signal of telecommunication of detected sonar sensor output to RS232 communication protocol signal and PROFIBUS communication protocol signal respectively; And the RS232 communication protocol signal is sent in the digital control system on the numerically control grinder, digital control system is presented at the mode of the RS232 communication protocol signal that receives with dynamic waveform on the screen; Acoustic emission detection system is imported the PROFIBUS communication protocol signal in the PLC system into; The PLC system sends command signal through the PLC programming in logic to the digital control system of said numerically control grinder, and the part that digital control system is controlled on the said numerically control grinder according to the command signal of receiving is carried out corresponding action.
The monitoring system of the utility model has obvious improvement.
Like the monitoring system of above-mentioned the utility model, the utility model comprises digital control system, sonar sensor, acoustic emission detection system and the PLC system of numerically control grinder.To be grinding machine add the sonar signal that sends man-hour and convert its sonar signal to signal of telecommunication output for workpiece the sonar signal that said sonar sensor received.So as long as grinding machine is being processed, sonar sensor just has signal of telecommunication output.Therefore, the monitoring system of the utility model can be monitored the overall process of numerically control grinder processing.
Like the monitoring system of above-mentioned the utility model, because the signal of telecommunication that acoustic emission detection system is sent detected sonar sensor in the utility model converts RS232 communication protocol signal and PROFIBUS communication protocol signal respectively to.That is to say characteristics such as the communication modes of the utility model is the network communication of PROFIBUS communications protocol, and it is fast that this communication modes has signaling rate, and fault rate is lower.So the monitoring system of the utility model has more real-time, reliability for the monitoring of numerically control grinder machining state.
Like the monitoring system of above-mentioned the utility model, because digital control system is presented at the mode of the RS232 communication protocol signal that receives with dynamic waveform on the screen.So the grinding process of the utility model is visual.The sonar waveform of grinding process order is presented on the screen of digital control system, makes the process engineer come the reasonability of analysis process according to the level and smooth degree of sonar waveform.The sonar waveform explains that more smoothly processing capacity is even more, and workpiece processing back surface smoothness will be high more.Observe grinding process through the sonar waveform, can analyze, instruct and produce technical process and error message.On the visual basis of grinding process, the process engineer will find out the cusp of waveform according to the level and smooth degree of sonar waveform, revise processing technology, thereby the grinding process process can be optimised, and quality is guaranteed, and reaches the optimization of grinding process.
Monitoring system like above-mentioned the utility model; The acoustic emission detection system of the utility model is sent in PLC (Programmable Logic Controller) system (embedded monitoring software) the PROFIBUS communication protocol signal that converts to through the PLC programming in logic; Can the grinding machine of PLC system output and collision alarm, the activation signal of workpiece be imported in the digital control system, instruct parts program (NC parts program) operation of digital control system.After digital control system receives collision alarm, can stop this parts program operation immediately, prevented that collision from taking place.Realized the anticollision function.So-called " idle running disappears " is exactly elimination or shortens grinding machine in process, the noncontact time of emery wheel and workpiece.Said " idle running " is in the grinding machine process because (the often having) emery wheel that grinding machine is produced in carrying out the action conversion process and the noncontact stroke of workpiece, and the time of this section stroke is the noncontact time.For grinding, shortening the idle running time is the key that improves grinding efficiency.In process, digital control system is not received the activation signal of grinding machine and workpiece, explains at this moment and right and wrong times of contact will instruct parts program to quicken process.Reduce the noncontact time as far as possible.Promptly eliminate " idle running ".So the monitoring system of the utility model has more intelligent.Can prevent the collision between grinding machine and the workpiece, and can reduce the grinding idle running time to greatest extent, improve working (machining) efficiency.
The monitoring system of comprehensive above-mentioned the utility model, the utility model are the real-time monitoring that in the numerically control grinder process, has realized machining state, thereby can be optimized grinding.And the monitoring system of the utility model is used more extensive, can be used for high-grade numerically control grinder, like numerical control Vertical Mill, numerical control roll mill, numerically controlled tooth grinding machine etc.
Description of drawings
Fig. 1 is the structural representation of the utility model monitoring system one embodiment;
Fig. 2 implements the curve map that the utility model monitoring system is monitored the sonar waveform that on digital control system, is shown in the grinding machine process;
Fig. 3 is the sketch map that grinding machine contacts with workpiece at the grinding process medium plain emery wheel.
The specific embodiment
Further specify the characteristic of the utility model monitoring system below in conjunction with accompanying drawing.
As shown in Figure 1, it comprises the digital control system 1 of numerically control grinder the utility model, sonar sensor 9, acoustic emission detection system 16 and PLC system 3.
In the present embodiment, the digital control system 1 of said numerically control grinder is selected the 840DSL digital control system of Siemens for use; Said sonar sensor 9 is selected the solid circular sonar sensor that has input/output port for use; Said acoustic emission detection system 16 is selected the AE6000 acoustic emission detection system (the AE6000 acoustic emission detection system of this Germany DITTLE company and the 840DSL digital control system of selected Siemens have been set up communication) of German DITTLE company for use; Said PLC system 3 selects S7300 series of PLC system for use, comprises hardware (Programmable Logic Controller) and software (embedded monitoring software), and software is PLC configuration programming software STEP7.
As shown in Figure 1, sonar sensor 9 is installed on the main shaft 8 of numerically control grinder near emery wheel 11.Sonar sensor 9 (annular sonar sensor) can receive its sonar signal soon and convert thereof into the signal of telecommunication and is sent in the acoustic emission detection system 16 through signal cable when emery wheel 11 contacts with workpiece 10 like this; Acoustic emission detection system 16 becomes the PROFIBUS protocol signal to be transferred in the PLC system 3 electrical signal conversion that receives on the one hand, as the signal source of realize disappearing idle running and anticollision function; On the other hand the RS232 protocol signal that converts to is transferred to digital control system 1 (Siemens 840DSL digital control system)) in, as the signal source that realizes grinding status visualization function.Said sonar sensor 9 has constituted a sonar monitoring system with acoustic emission detection system 16.
As shown in Figure 1; In the present embodiment; The 840DSL digital control system of the Siemens that the digital control system 1 of numerically control grinder is selected for use; It has own unique detection system, the control of full cut-off ring, and containing four axis servomotors is respectively the SP axle (main shaft) 4 that drives the bistrique rotation, the C axle 5 of workbench rotation, the X axle 6 that bistrique (emery wheel) traverse feed is moved, the Z axle 7 that bistrique (emery wheel) length feed moves; Servo-drive system has selected for use S120 AC servo driver element and four servomotors to be respectively the 1FT6 servomotor 13 of the 1FT6 servomotor 14 of the IPH7 servomotor 15 of corresponding SP axle (main shaft), corresponding C axle, corresponding X axle, the 1FT6 servomotor 12 of corresponding Z axle.Digital control system 1 constitutes closed loop controlling structure with servo-drive system, has satisfied the requirement on machining accuracy of this numerically control grinder.The logic control of this numerically control grinder is to lean on above-mentioned S7300 series of PLC system to accomplish.As shown in Figure 1, in the present embodiment, PLC system 3 controls four axis servomotors respectively through four servo modules: SP axle 4, C axle 5, X axle 6 and Z axle 7.Servo-drive system power supply 3 is full servo-drive system power supply.
It is that the frequency that emery wheel 11 on the numerically control grinder sends when contacting with workpiece 10 is the HF noise signal of 250-350KHz that the numerically control grinder that said sonar sensor 9 is received adds the sonar signal that sends man-hour for workpiece.Because grinding machine is in grinding process, the emery wheel 11 of grinding machine all produces noise when contacting with workpiece 10.The frequency spectrum of this noise is mainly the hot-tempered sound of high frequency that frequency is 250-350KHz.Noise as for lathes such as the gear-box of grinding machine, bearing, hydraulic means produce mainly is made up of the hot-tempered sound of low frequency.Therefore the frequency band of grinding noise and machine noise is very big at interval.The utility model is referred to as sonar with high-frequency noise.HF noise signal is referred to as sonar signal.When the emery wheel contact workpiece, noise grade significantly increases, thereby can obtain the critical value of a reliable and stable.When noise reaches this critical value, system will export a pulse signal.The width of this pulse signal is more than or equal to 10ms.It is that rising front is effective that digital control system measurement parameter on the grinding machine is set this pulse signal.
As shown in Figure 1; Sonar sensor 9 is installed on the position near the main shaft 8 of emery wheel 11; When emery wheel 11 contacted with workpiece 10, the HF noise signal that sonar sensor 9 will receive soon (sonar signal) also converted its sonar signal to the signal of telecommunication and outputs in the acoustic emission detection system 16; Acoustic emission detection system 16 is transferred to the RS232 protocol signal of its electrical signal conversion in the digital control system 1, and digital control system 1 is presented at (as shown in Figure 2) on the screen with its sonar waveform, has realized the visual function of grinding process.
The visual sonar waveform of grinding process is as shown in Figure 2.Abscissa t is the time among Fig. 2; Ordinate db is a decibel value; 01 line is an activation signal decibel line, and 02 line is normal grinding status signal decibel line, and 03 line is a collision alarm decibel line; The decibel value of three kinds of signals can be adjusted according to on-site actual situations, and 04 curve is sonar signal dynamic waveform (being called the sonar waveform).When sonar waveform 04 curve contacts with 01,02,03 any decibel line first, will send a pulse signal to the PLC system, the PLC system sends instruction to parts program, and parts program is carried out action according to this instruction.With this.The grinding operation of emery wheel on the control grinding machine.Because the grinding process process can be presented on the digital control system screen in order, make the process engineer can come the reasonability of analysis process according to the level and smooth degree of sonar waveform.The sonar waveform explains that more smoothly processing capacity is even more, and workpiece processing back surface smoothness will be high more; Otherwise, when the fluctuation of sonar waveform is big, explain that processing technology needs to improve.So observe grinding process through the sonar waveform on the digital control system screen, can analyze technical process and error message, instruct and produce.This digital control system has grinding state playback function simultaneously.
Acoustic emission detection system 16 is input to the PROFIBUS communication protocol signal of conversion in the PLC system 3; The PROFIBUS communication protocol signal that 3 pairs of PLC systems receive carries out PLC programming in logic (software of PLC system itself); And collision alarm and the activation signal of PLC system output imported in the parts program of digital control system 1, parts program will be according to instruction execution corresponding action.
About idle running and the anticollision of disappearing: so-called " idle running " be exactly grinding machine in process owing to the surperficial different of processing and the operation of processing on an equal basis reason can produce discontinuous processing.The idle running time of general grinding machine accounts for about 30% of the whole grinding time according to statistics.For grinding technique, " idle running " time is useless, and is short more good more.So shorten the idle running time is the key that improves grinding efficiency.The utility model utilizes sonar sensor to judge the machining state of grinding machine, and when no sonar signal transmitted, the utility model was regarded as processing and is in the idle stroke state, and this moment, each reference axis of grinding machine was carried out fast moving; When detecting the contacting first of emery wheel and workpiece, the utility model is judged as grinding machine according to the power of sonar signal and is just beginning to get into the grinding state, and at this moment each reference axis of grinding machine is the course feed motion by original fast transition.So just save idle running running time, improved operating efficiency.
The utility model is found for the impact energy between emery wheel and workpiece at once.Because the utility model is according to the strong and weak of the collection real-time judge sonar signal of on-the-spot sonar and set maximum permissible value.When sonar signal surpassed this setting value, the utility model was regarded as collision alarm.When the sonar monitoring system detected this signal, each reference axis of grinding machine avoided stop motion immediately because emery wheel or workpiece are damaged in the collision of emery wheel and workpiece, thereby reduces further loss.Can utilize the size of feeding of the servo-drive system of this signal controlling grinding machine to be no more than the grinding limit.So the sonar signal intensity of normal grinding and the sonar signal intensity different set that crashes were suddenly carried out the trigger value of action conversion when the utility model contacted with workpiece according to emery wheel.
Said idle running and the anticollision process of disappearing; As shown in Figure 3, when emery wheel touches 01 line the activation signal (in shown in 01 line) of emery wheel and workpiece with Fig. 2, this moment, the emery wheel translational speed was feed motion by original fast transition; When emery wheel leaves 01 line; Translational speed is changed into fast by feed motion, thereby reduces the noncontact time, realizes disappearing lost motion functionality; When emery wheel touches 02 line (in Fig. 2 shown in 02 line) is normal grinding state; When emery wheel touches 03 line (in Fig. 2 shown in 03 line) is excessive grinding state, and the utility model is regarded as collision alarm, and emery wheel this moment feed-disabling is immediately avoided damaging emery wheel or workpiece, thereby realized the anticollision function.
Claims (2)
1. monitoring system that detects the grinding machine machining state comprises the digital control system of numerically control grinder it is characterized in that comprising sonar sensor, acoustic emission detection system and PLC system; Said sonar sensor receives numerically control grinder and adds the sonar signal that sends man-hour for workpiece, and converts the sonar signal that it receives to the signal of telecommunication and be sent in the acoustic emission detection system; Acoustic emission detection system converts the signal of telecommunication of detected sonar sensor output to RS232 communication protocol signal and PROFIBUS communication protocol signal respectively; And the RS232 communication protocol signal is sent in the digital control system on the numerically control grinder, digital control system is presented at the mode of the RS232 communication protocol signal that receives with dynamic waveform on the screen; Acoustic emission detection system is imported the PROFIBUS communication protocol signal in the PLC system into; The PLC system sends command signal through the PLC programming in logic to the digital control system of said numerically control grinder, and the part that digital control system is controlled on the said numerically control grinder according to the command signal of receiving is carried out corresponding action.
2. the monitoring system of detection grinding machine machining state according to claim 1 is characterized in that it is that the frequency that emery wheel on the numerically control grinder sends when contacting with workpiece is the HF noise signal of 250-350KHz that numerically control grinder that said sonar sensor receives adds the sonar signal that sends man-hour for workpiece.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201120222090U CN202147217U (en) | 2011-06-28 | 2011-06-28 | Monitoring system for detecting machining states of grinding machine |
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| CN201120222090U CN202147217U (en) | 2011-06-28 | 2011-06-28 | Monitoring system for detecting machining states of grinding machine |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102275131A (en) * | 2011-06-28 | 2011-12-14 | 上海三一精机有限公司 | Monitoring method and monitoring system for detecting processing state of grinding machine |
| CN105415191A (en) * | 2015-11-26 | 2016-03-23 | 西北工业大学 | Grinding state detecting and controlling method and device based on sound emission |
| CN106041737A (en) * | 2016-05-27 | 2016-10-26 | 上海理工大学 | Online measurement method for effective cutting depth of plane grinding |
| US9494932B2 (en) | 2012-09-13 | 2016-11-15 | Omron Corporation | Monitoring device, monitoring method, and recording medium |
| CN106112713A (en) * | 2016-08-27 | 2016-11-16 | 无锡市明鑫数控磨床有限公司 | Numerical control deep hole internal grinder measures monitoring processing integrated apparatus and control system |
| CN107081487A (en) * | 2017-04-25 | 2017-08-22 | 谭清平 | It is a kind of can two-sided polishing and preventing wear and tear the gear grinder on groove top |
| TWI681275B (en) * | 2017-08-31 | 2020-01-01 | 日商三菱重工機械系統股份有限公司 | Monitoring device, monitoring method and program |
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2011
- 2011-06-28 CN CN201120222090U patent/CN202147217U/en not_active Expired - Lifetime
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102275131A (en) * | 2011-06-28 | 2011-12-14 | 上海三一精机有限公司 | Monitoring method and monitoring system for detecting processing state of grinding machine |
| CN102275131B (en) * | 2011-06-28 | 2013-03-20 | 上海三一精机有限公司 | Monitoring method and monitoring system for detecting processing state of grinding machine |
| US9494932B2 (en) | 2012-09-13 | 2016-11-15 | Omron Corporation | Monitoring device, monitoring method, and recording medium |
| TWI569120B (en) * | 2012-09-13 | 2017-02-01 | Omron Tateisi Electronics Co | A monitoring device, a monitoring method, a program and a recording medium thereof |
| CN104583887B (en) * | 2012-09-13 | 2017-03-01 | 欧姆龙株式会社 | Monitoring arrangement and supervision method |
| CN105415191A (en) * | 2015-11-26 | 2016-03-23 | 西北工业大学 | Grinding state detecting and controlling method and device based on sound emission |
| CN106041737A (en) * | 2016-05-27 | 2016-10-26 | 上海理工大学 | Online measurement method for effective cutting depth of plane grinding |
| CN106041737B (en) * | 2016-05-27 | 2018-01-26 | 上海理工大学 | Flat surface grinding effective cut depth On-line Measuring Method |
| CN106112713A (en) * | 2016-08-27 | 2016-11-16 | 无锡市明鑫数控磨床有限公司 | Numerical control deep hole internal grinder measures monitoring processing integrated apparatus and control system |
| CN107081487A (en) * | 2017-04-25 | 2017-08-22 | 谭清平 | It is a kind of can two-sided polishing and preventing wear and tear the gear grinder on groove top |
| TWI681275B (en) * | 2017-08-31 | 2020-01-01 | 日商三菱重工機械系統股份有限公司 | Monitoring device, monitoring method and program |
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Granted publication date: 20120222 Effective date of abandoning: 20130320 |
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