CN102501173A - Method for measuring temperature of grinding region of surface grinding - Google Patents
Method for measuring temperature of grinding region of surface grinding Download PDFInfo
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- CN102501173A CN102501173A CN2011103697752A CN201110369775A CN102501173A CN 102501173 A CN102501173 A CN 102501173A CN 2011103697752 A CN2011103697752 A CN 2011103697752A CN 201110369775 A CN201110369775 A CN 201110369775A CN 102501173 A CN102501173 A CN 102501173A
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Abstract
The invention relates to a method for measuring the temperature of a grinding region of surface grinding. The method comprises the following steps: (1), making a thermocouple temperature sensor, (2), calibrating the thermocouple temperature sensor, and (3), measuring the temperature of the grinding region. During the grinding process, firstly a wire I and a wire II are connected into a collection card with a cold-end compensation function and a computer, then the grinding test is carried out after setting the rotation speed (Vs) of a grinding wheel and the rotation speed (Vw) of a working table, the top part of a ground work piece and the top part of a constantan sheet as thermocouple material are mutually lapped or welded together to form a thermocouple node, and finally the detected value of temperature of the grinding region is displayed and recorded by the computer through the shielded-type collection card with a cold-end compensation function and a shielded cable. The method can measure the temperature of the grinding region relatively and accurately when the work piece is ground by a surface grinding machine, and can protect the work piece from grinding burn and large residual stress by optimizing the process parameters of the surface grinding operation. The method has significance of improving quality of ground surface of the work piece and increasing the grinding efficiency.
Description
Technical field
The present invention relates to a kind of
GrindingThermometry, especially a kind of when being used for flat surface grinding, the grinding area thermometry.
Background technology
In the accurate grinding process, the grinding area temperature has very big influence to the surface quality of part to be processed and the cutting ability of emery wheel abrasive particle.When the grinding area temperature is higher, the metallographic structure of part top layer is changed, grinding burn appears.The transient temperature that grinding area is higher in grinding and cooling procedure, forms thermal stress, makes by mill part top layer and produces bigger residual stress, even the surface is cracked.For avoiding above-mentioned phenomenon to take place, the flat surface grinding process relies on operator's experience to choose working process parameter to carry out grinding, be difficult to reach optimum efficiency mostly at present.Therefore, the grinding area temperature during the measurement plane grinding how effectively is to optimizing grinding process parameters and significant to improving workpiece grinding quality and grinding efficiency.
Patent of the present invention is invented a kind of effective flat surface grinding district temperature measuring equipment on the principle based on thermocouple.Through novel grinding area temperature measuring equipment being demarcated, is tested the Filtering Processing and the experimental measurements comparative analysis of image data, this experiment show the method can effectively be applied to optimize the temperature survey of flat surface grinding district.Can be optimized the flat surface grinding working process parameter according to this experiment measuring temperature results, avoid workpiece to produce phenomenons such as grinding burn and big residual stress, improve grinding efficient and grinding workpiece surface quality.
Summary of the invention
The present invention is the grinding area thermometry that a kind of flat surface grinding will be provided, and is used to optimize the flat surface grinding technological parameter and effectively avoids workpiece to produce phenomenons such as grinding burn and big residual stress, improves grinding efficient and grinding workpiece surface quality.
For realizing above-mentioned purpose, technical scheme of the present invention is; A kind of grinding area thermometry of flat surface grinding, concrete steps are:
1) makes the thermocouple temperature measurement sensor
Be connected with thermocouple material constantan sheet two ends with the conductor grinding work piece of lead
with lead
different materials; And with between grinding work piece and the constantan sheet with the mica-sheet insulation group just, form to measure and to use the thermocouple temperature measurement sensor;
2) demarcate the thermocouple temperature measurement sensor
Thermocouple temperature measurement sensor to be calibrated and the grinding work piece made are placed on the support of fuel tank; Heating control panel control heater through adopting oily temperature close-loop feedback control sensor heats kerosene; Adopt a standard couple to measure the actual temperature of oil temperature in the demarcation, the measurement temperature that adopts the mercury sensor simultaneously as a reference; In calibration process, the variations in temperature control range is 0 ℃-150 ℃, will after the oil temperature is stable, read the temperature value of thermocouple temperature measurement sensor to be calibrated and standard couple at every turn; Through after demarcating, make thermometric maximum deviation≤0.5 ℃ of thermocouple temperature measurement sensor and the standard couple of demarcation;
3) measure the grinding area temperature
In Grinding Process, at first with lead
And lead
Access has the capture card and the computer of cold junction compensation function, and it is V that grinding wheel speed is set then
sWith the speed of table be V
wCarry out grinding experiment processing; Grinding work piece is once grinding; Grinding work piece and thermocouple material constantan sheet overlap mutually or formation thermocouple node welded together at the top, show and write down the grinding area temperature value of test at computer through protected type capture card and the shielded cable that has the cold junction compensation function at last.
When measuring the grinding area temperature, adopt Chebyshev II type digital filter that the data of gathering are carried out low-pass filtering treatment, remove of the influence of high-frequency interferencing signals such as cooling fluid and electromagnetic environment to experimental measurements:
The sample frequency of setting data capture card does
=250kHz starts lathe, and the setting grinding wheel speed is V
s, the speed of table is V
w, and when making emery wheel and grinding work piece contactless, the signal of gathering through data collecting card and computer is regarded as interfering signal, analyzes through its radio-frequency component, confirms the cut-off frequency of low pass filter.
The invention has the beneficial effects as follows;
The present invention adopts thermocouple principle; Conductor two ends by two kinds of heterogeneities are bonded into into the loop; When two abutment thermocouple temperature not simultaneously, will in the loop, produce electromotive force, just can demonstrate the pairing temperature value of electromotive force that thermocouple produces through corresponding instrument.
Through this patent of invention; Grinding area temperature during measurement plane grinding machine workpiece comparatively exactly; Can effectively avoid workpiece to produce phenomenons such as grinding burn and big residual stress through optimizing the flat surface grinding working process parameter, this patent of invention is significant to improving workpiece grinding surface quality and grinding efficiency.
Description of drawings
Fig. 1 is the measuring transducer structure principle chart;
Fig. 2 is that experiment is with thermocouple sensor calibration principle figure;
Fig. 3 is a flat surface grinding district temperature test sketch map;
Fig. 4 is test piece grinding area temperature-time graph.
The specific embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is further described.
As shown in Figure 1; The used thermocouple temperature measurement sensor 18 of the present invention is connected the conductor grinding work piece 1 of different materials with lead
5 by lead
4 with thermocouple material constantan sheet 2 two ends, and with forming with mica sheet 3 insulation between grinding work piece 1 and the constantan sheet 2.
In the side of grinding work piece 1 groove 11 is arranged; Constantan sheet 2 is positioned in the grinding work piece groove 11 with mica sheet 3; Lead
4 and lead
5 be bonding conductor material grinding work piece 1 and thermocouple material constantan sheet 2 respectively, uses mica sheet 3 insulation between grinding work piece 1 and the constantan sheet 2; Through glue special two parts grinding work piece 1 that separates is bonded together.Size of ground workpiece size: length L=60mm, height H=50mm and width B=60mm, constantan chip size size: thickness is 20um, highly is 0.38mm for 50mm and width, the mica sheet size: thickness is 5um, highly is that 50mm and width are 0.5mm.
As shown in Figure 2, before experiment, demarcate above-mentioned thermocouple temperature measurement sensor 18.Thermocouple temperature measurement sensor of making among above-mentioned Fig. 1 to be calibrated 18 and grinding work piece 1 are placed on the support of fuel tank 12; 17 pairs of kerosene 13 of heating control panel 14 control heaters through adopting oily temperature close-loop feedback control sensor 15 heat; Adopt a standard couple 19 to measure the actual temperature of oil temperature in the demarcation, the measurement temperature that adopts mercury sensor 16 simultaneously as a reference.In calibration process, the variations in temperature control range is 0 ℃-150 ℃, will after the oil temperature is stable, read the temperature value of thermocouple temperature measurement sensor 18 and standard couple 19 at every turn; After the method demarcation, make this experiment be no more than 0.5 ℃ with the thermometric maximum deviation of thermocouple temperature measurement sensor of demarcating 18 and standard couple 19.
As shown in Figure 3; Before grinding; Be placed on the platen 6 measuring transducer and clamping earlier; Then lead
4 and lead
5 are inserted the capture card 7 that has cold junction compensation (CJC) function; Be connected with computer (9) through shielded cable 8 again, after debugging, guarantee the entire measuring device operate as normal.
Data filtering is handled: as shown in Figure 4, because the experiment measuring curve begins to respond maximum of T from temperature
MaxMeasuring Time be generally less than 0.02 (s), maximum temperature values is T in order accurately to obtain accurately
Max, this measurement mechanism need be provided with higher sample frequency and carry out data acquisition.In order to remove the influence of high-frequency interferencing signals such as cooling fluid and electromagnetic environment to experimental measurements, patent of the present invention uses Chebyshev II type digital filter that the data of gathering are carried out low-pass filtering treatment.
The sample frequency of setting data capture card 7 does
=250kHz starts lathe, and setting emery wheel 10 rotating speeds is V
s, workbench 6 speed are V
w, and when making emery wheel 10 and grinding work piece 1 contactless, the signal of being gathered through the data collecting card 7 and the computer 9 of above-mentioned measurement mechanism is regarded as interfering signal, analyzes through its radio-frequency component, confirms the cut-off frequency of low pass filter.
Lathe grinding experiment, setting emery wheel 10 rotating speeds is V
s, workbench 6 speed are V
wAnd each grinding depth is a
pCarry out the cut experiment, can be through the protected type capture card 7 and the shielded cable 8 that have cold junction compensation (CJC) function at the grinding area temperature value that computer 9 shows and record is tested.As shown in Figure 4, experiment can be measured the temperature maximum of T of grinding area
MaxReach measuring point temperature change curve S in time, M is the grinding burn critical temperature value of this grinding work piece material, through optimizing the technological parameter of above-mentioned grinding experiment, makes T when can make its material material removal rate maximum
Max<m avoids taking place the burn phenomenon.
Claims (2)
1. the grinding area thermometry of a flat surface grinding is characterized in that concrete steps are:
1) makes thermocouple temperature measurement sensor (18)
Be connected with thermocouple material constantan sheet (2) two ends with the conductor grinding work piece (1) of lead
(5) with lead
(4) different materials; And with between grinding work piece (1) and the constantan sheet (2) with mica sheet (3) insulation group just, form to measure with thermocouple temperature measurement sensor (18);
Demarcate thermocouple temperature measurement sensor (18)
Thermocouple temperature measurement sensor to be calibrated (18) and the grinding work piece (1) made are placed on the support of fuel tank (12); Heating control panel (14) control heater (17) through adopting oily temperature close-loop feedback control sensor (15) heats kerosene (13); Adopt a standard couple (19) to measure the actual temperature of oil temperature in the demarcation, the measurement temperature that adopts mercury sensor (16) simultaneously as a reference; In calibration process, the variations in temperature control range is 0 ℃-150 ℃, will after the oil temperature is stable, read the temperature value of thermocouple temperature measurement sensor to be calibrated (18) and standard couple (19) at every turn; Through after demarcating, the thermocouple temperature measurement sensor (18) that makes demarcation and thermometric maximum deviation≤0.5 of standard couple ℃;
3) measure the grinding area temperature
In Grinding Process, at first with lead
(4) and lead
(5) insert capture card (7) and the computer (9) that has the cold junction compensation function, it is V that emery wheel (10) rotating speed is set then
sAnd workbench (6) speed is V
wCarry out grinding experiment processing; Grinding work piece (1) is once grinding; Grinding work piece (1) overlaps mutually or formation thermocouple node welded together at the top with thermocouple material constantan sheet (2), shows and write down the grinding area temperature value of test at computer (9) through protected type capture card (7) and the shielded cable (8) that has the cold junction compensation function at last.
2. the grinding area thermometry of flat surface grinding according to claim 1; It is characterized in that: when measuring the grinding area temperature; Adopt Chebyshev II type digital filter that the data of gathering are carried out low-pass filtering treatment, remove of the influence of high-frequency interferencing signals such as cooling fluid and electromagnetic environment experimental measurements:
The sample frequency of setting data capture card (7) does
=250kHz starts lathe, and setting emery wheel (10) rotating speed is V
s, workbench (6) speed is V
w, and when making emery wheel (10) and grinding work piece (1) contactless, the signal of being gathered through data collecting card (7) and computer (9) is regarded as interfering signal, through its radio-frequency component analysis, confirms the cut-off frequency of low pass filter.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104136160A (en) * | 2013-02-20 | 2014-11-05 | 日本精工株式会社 | Machining method for threaded section and machining device |
| CN105784167A (en) * | 2016-03-01 | 2016-07-20 | 上海交通大学 | Crankshaft connecting rod neck follow grinding temperature measuring device |
| CN107813190A (en) * | 2016-09-13 | 2018-03-20 | 财团法人工业技术研究院 | Processing constant temperature control system and utilization method thereof |
| CN110666685A (en) * | 2019-10-16 | 2020-01-10 | 河北工业大学 | Heat dissipation grinding device with grinding face temperature measurement function |
| CN111906693A (en) * | 2020-07-27 | 2020-11-10 | 郑州磨料磨具磨削研究所有限公司 | Grinding arc area thermal power integrated measurement device and method |
| CN115415937A (en) * | 2022-08-10 | 2022-12-02 | 温州大学 | Method and system for measuring temperature of grinding area |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104136160A (en) * | 2013-02-20 | 2014-11-05 | 日本精工株式会社 | Machining method for threaded section and machining device |
| CN104136160B (en) * | 2013-02-20 | 2016-09-07 | 日本精工株式会社 | The processing method of threaded portion and processing unit (plant) |
| CN105784167A (en) * | 2016-03-01 | 2016-07-20 | 上海交通大学 | Crankshaft connecting rod neck follow grinding temperature measuring device |
| CN105784167B (en) * | 2016-03-01 | 2019-09-03 | 上海交通大学 | Crank-shaft link neck follow grinding temperature measuring device |
| CN107813190A (en) * | 2016-09-13 | 2018-03-20 | 财团法人工业技术研究院 | Processing constant temperature control system and utilization method thereof |
| US10406643B2 (en) | 2016-09-13 | 2019-09-10 | Industrial Technology Research Institute | Machining thermostatic control system and method of using the same |
| CN110666685A (en) * | 2019-10-16 | 2020-01-10 | 河北工业大学 | Heat dissipation grinding device with grinding face temperature measurement function |
| CN111906693A (en) * | 2020-07-27 | 2020-11-10 | 郑州磨料磨具磨削研究所有限公司 | Grinding arc area thermal power integrated measurement device and method |
| CN111906693B (en) * | 2020-07-27 | 2022-02-08 | 郑州磨料磨具磨削研究所有限公司 | Grinding arc area thermal power integrated measurement device and method |
| CN115415937A (en) * | 2022-08-10 | 2022-12-02 | 温州大学 | Method and system for measuring temperature of grinding area |
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Application publication date: 20120620 |