CN103406833B - Difficult-to-machine material form grinding state of cooling monitoring device - Google Patents
Difficult-to-machine material form grinding state of cooling monitoring device Download PDFInfo
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- CN103406833B CN103406833B CN201310350257.5A CN201310350257A CN103406833B CN 103406833 B CN103406833 B CN 103406833B CN 201310350257 A CN201310350257 A CN 201310350257A CN 103406833 B CN103406833 B CN 103406833B
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Abstract
The invention discloses a kind of difficult-to-machine material form grinding state of cooling monitoring device, including temperature measuring section, coolant pressure measurement part, data collecting card and computer.Signal measured by temperature measuring section and coolant pressure measurement part is gathered by data collecting card, then further through storing in data line transfer to computer and processing.The data gathered, after computer storage and processing, can be the optimization offer foundation of grinding process parameters and the type of cooling, thus the burning problems of workpiece with form surface during solving difficult-to-machine material form grinding further, improve the efficiency of form grinding.
Description
Technical field
The present invention relates to a kind of industry processes monitoring device, specifically a kind of difficult-to-machine material efficient form grinding state of cooling monitoring device.
Background technology
It is grinding burn that difficult-to-machine material delays problem maximum during mill, the most sudden burn.Originally this phenomenon obtains theoretical explanation the most well, until the Andrew professor of Bristol university introduces the boiling heat transfer technology in thermal technology field in the seventies in last century, just this phenomenon is explained.It points out during slow mill, when grinding heat current density close to and less than critical heat metric density time, the grinding fluid of grinding arc area is in the nucleateboiling stage, workpiece surface temperature now can maintain less than 120-130 DEG C, and when grinding arc area exceedes critical heat flux density, arc district grinding fluid i.e. can occur film boiling, and the heat of accumulation makes workpiece surface temperature steeply rise, and the burn temperature of burst is even close to the fusing point of material.Problem for grinding heat, Chinese scholars is from cooling condition, the angle of grinding tool and grinding process has done substantial amounts of research, research shows, in the high efficient grinding of the difficult-to-machine materials such as nickel base superalloy, the control of workpiece surface temperature is played vital effect by the reasonable employment of coolant.
For form grinding, its Dynamic Cutting Process and the state of cooling are more complicated than flat surface grinding, and particularly with the efficient form grinding of difficult-to-machine material, it is more easily generated grinding burn and micro-crack than flat surface grinding.Form grinding for difficult-to-machine material, realize the workpiece surface temperature of profile zones of different and the measurement of the state of cooling particularly important with control, it is possible not only to realize workpiece zones of different and forecast and the control of burn occurs, more can realize the optimization to form grinding technological parameter and cooling condition further, thus improve the efficiency of difficult-to-machine material form grinding.
Summary of the invention
The technical problem to be solved is to provide a kind of difficult-to-machine material form grinding state of cooling monitoring device, realize the difficult-to-machine material form grinding state of cooling is monitored, record corresponding data, thus set up the relation of workpiece to be machined surface temperature and fluid conditions, optimization for grinding process parameters and the type of cooling provides foundation, thus the burning problems of workpiece to be machined profile during solving difficult-to-machine material form grinding further, improve the efficiency of form grinding.
For solving above-mentioned technical problem, a kind of difficult-to-machine material form grinding state of cooling monitoring device that the present invention provides includes temperature measuring section, coolant pressure measurement part, data collecting card and computer.In described temperature measuring section and coolant pressure measurement part are all embedded in workpiece to be machined and being connected to data collecting card by data wire, data collecting card is connected with computer further through data wire.The data that temperature measuring section and coolant pressure measurement part are obtained are gathered by data collecting card, are then stored by data line transfer and process in computer.
Further improvement as technique scheme, described coolant pressure measurement part is made up of several pressure taps and the piezoelectric type dynamic pressure transducer identical with pressure tap quantity, and pressure tap and piezoelectric type dynamic pressure transducer coordinate the pressure recording form grinding arc district coolant.Described pressure tap is all processed inside workpiece to be machined, and it is vertical with machined surface and runs through workpiece to be machined.Described piezoelectric type dynamic pressure transducer is arranged on bottom each pressure tap correspondingly.
Further walking improvement as technique scheme, the distance between described pressure tap is equal.
Another kind of improvement as technique scheme, described Temperature measuring section is divided into Semi-artifical thermocouple, described Semi-artifical thermocouple is made up of plastic packaging film and the some Semi-artifical thermocouple silks being encapsulated in plastic packaging film, and Semi-artifical thermocouple silk is insulated by plastic packaging film with workpiece to be machined；Described Semi-artifical thermocouple silk is perpendicular to machined surface and runs through workpiece to be machined.
As the further improvement of technique scheme, the quantity of described Semi-artifical thermocouple silk and arrangement distance and the quantity of pressure tap with arrange apart from consistent, the form grinding arc district workpiece to be machined surface temperature making acquisition is corresponding with coolant pressure.
As technique scheme the material selection better performances further improving described Semi-artifical thermocouple silk, apply wide constantan wire.
As the further improvement of technique scheme, the thickness of described plastic packaging film is 80 μm, to reach more preferable insulation effect.
Difficult-to-machine material form grinding state of cooling monitoring device provided by the present invention, can realize the difficult-to-machine material form grinding state of cooling is monitored, measure workpiece to be machined surface temperature and coolant pressure, the data gathered are after computer storage and processing, the relation of workpiece to be machined surface temperature and fluid conditions can be set up, optimization for grinding process parameters and the type of cooling provides foundation, thus the burning problems of workpiece to be machined profile during solving difficult-to-machine material form grinding further, improve the efficiency of form grinding.
Accompanying drawing explanation
Fig. 1 a is monitoring device overall structure schematic diagram.
Fig. 1 b is temperature measuring section and coolant pressure measurement part partial enlarged drawing.
Fig. 2 a is temperature measuring section cross sectional representation.
Fig. 2 b is temperature measuring section Longitudinal cross section schematic.
Fig. 3 a is that coolant pressure measures partial cross-sectional view.
Fig. 3 b is that coolant pressure measures partial longitudinal section schematic diagram.
Detailed description of the invention
Below in conjunction with the accompanying drawings embodiments of the present invention are elaborated.
As illustrated in figs. ia and ib, a kind of difficult-to-machine material form grinding state of cooling monitoring device of the present invention includes that temperature measuring section 6, coolant pressure measure part 7, data collecting card 4 and computer 5.Described temperature measuring section 6 and coolant pressure are measured in part 7 is all embedded in workpiece to be machined 1 and are connected to data collecting card 4 by data wire, and data collecting card 4 is connected with computer 5 further through data wire.When emery wheel 2 is shaped grinding to workpiece to be machined 1, there is coolant nozzle 3 to spray coolant and workpiece to be machined 1 is cooled down.When grinding process is carried out, temperature measuring section 6 and coolant pressure are measured part 7 and are recorded form grinding arc district workpiece to be machined 1 surface temperature and the coolant pressure data in form grinding arc district respectively, then being sent to data collecting card 4 by data wire, data collecting card 4 transfers data to computer 5 further through data wire and stores and process.
As shown in Fig. 2 a, Fig. 2 b and Fig. 3 a, Fig. 3 b, coolant pressure is measured part 7 and is made up of several pressure taps 71 and the piezoelectric type dynamic pressure transducer 72 identical with described pressure tap 71 quantity.Wherein pressure tap 71 is to process at workpiece to be machined 1 internal, and its diameter is between 0.5mm-2mm, vertical with machined surface and run through whole workpiece to be machined 1.Piezoelectric type dynamic pressure transducer 72 is arranged on the bottom of each pressure tap correspondingly, and its rated pressure is 100bar, can be used for the condition of high-pressure spray cooling.The arrangement distance of pressure tap 71 and quantity, determine according to the complexity of the profile of workpiece to be machined to be measured.
Temperature measuring section 6 is Semi-artifical thermocouple, described Semi-artifical thermocouple is made up of plastic packaging film 61 and the Semi-artifical thermocouple silk 62 being encapsulated in plastic packaging film 61, wherein the thickness of plastic packaging film 61 is 80 μm, and Semi-artifical thermocouple silk 62 is insulated by described plastic packaging film 61 with workpiece to be machined 1.Described Semi-artifical thermocouple silk 62 is perpendicular to machined surface and runs through workpiece to be machined 1, its quantity and arrangement distance and the quantity of pressure tap and arrange apart from consistent.The measurement of temperature uses wired method, forms Semi-artifical thermocouple, the material selection better performances of described Semi-artifical thermocouple silk 62, applies wide constantan wire, and all Semi-artifical thermocouple silks share a cold end.Signal measured by Semi-artifical thermocouple is grinding arc area workpiece to be machined surface heat electromotive force, and the calibration value then in conjunction with material can obtain actual workpiece to be machined surface temperature.
During grinding, forming grinding wheel 2 sequentially passes through arc district Pressure sensing part 7 and workpiece to be machined temperature measuring section 6, due to the position one_to_one corresponding of Semi-artifical thermocouple silk 62 with pressure tap 71, the arc district coolant pressure therefore obtained is the most corresponding with workpiece to be machined surface temperature.Measured data are after computer storage and processing, and the optimization for grinding process parameters and the type of cooling provides foundation.
The concrete application approach of the present invention is a lot, and the above is only the preferred embodiment of the present invention, it should be pointed out that; for those skilled in the art; under the premise without departing from the principles of the invention, it is also possible to make some improvement, these improvement also should be regarded as protection scope of the present invention.
Claims (3)
1. a difficult-to-machine material form grinding state of cooling monitoring device, it is characterised in that: include that temperature measuring section (6), coolant pressure measure part (7), data collecting card (4) and computer (5)；Described temperature measuring section (6) and coolant pressure are measured in part (7) is all embedded in workpiece to be machined (1) and are connected to data collecting card (4) by data wire, and data collecting card (4) is connected with computer (5) further through data wire；Described temperature measuring section (6) is Semi-artifical thermocouple, and described Semi-artifical thermocouple is made up of plastic packaging film (61) and the some Semi-artifical thermocouple silks (62) being encapsulated in plastic packaging film (61)；Described Semi-artifical thermocouple silk (62) is perpendicular to machined surface and runs through workpiece to be machined (1)；The thickness of described plastic packaging film (61) is 80 μm；Described coolant pressure is measured part (7) and is made up of several pressure taps (71) and the piezoelectric type dynamic pressure transducer (72) identical with pressure tap (71) quantity；Described pressure tap (71) is all processed at workpiece to be machined (1) internal, and it is vertical with machined surface and runs through workpiece to be machined (1)；Described piezoelectric type dynamic pressure transducer (72) is arranged on each pressure tap (71) bottom correspondingly；The quantity of described Semi-artifical thermocouple silk (62) is identical with the quantity of pressure tap (71), the position one_to_one corresponding of the position of Semi-artifical thermocouple silk (62) and pressure tap (71), the arrangement of the arrangement distance of Semi-artifical thermocouple silk (62) and pressure tap (71) is apart from consistent.
Difficult-to-machine material form grinding state of cooling monitoring device the most according to claim 1, it is characterised in that: the distance between described pressure tap (71) is equal.
Difficult-to-machine material form grinding state of cooling monitoring device the most according to claim 1, it is characterised in that: described Semi-artifical thermocouple uses wired method to make.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310350257.5A CN103406833B (en) | 2013-08-13 | 2013-08-13 | Difficult-to-machine material form grinding state of cooling monitoring device |
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| CN201310350257.5A CN103406833B (en) | 2013-08-13 | 2013-08-13 | Difficult-to-machine material form grinding state of cooling monitoring device |
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| CN103406833B true CN103406833B (en) | 2016-08-10 |
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| CN109909885A (en) * | 2019-04-25 | 2019-06-21 | 北京工业大学 | A kind of closed-loop control system of grinding temperature |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR100506942B1 (en) * | 2003-09-03 | 2005-08-05 | 삼성전자주식회사 | Chemical mechanical polishing apparatus |
| JP2010194641A (en) * | 2009-02-24 | 2010-09-09 | Jtekt Corp | Grinding burn determination method and grinding machine using the same |
| CN102221416B (en) * | 2011-03-10 | 2012-10-10 | 清华大学 | Polishing solution physical parameter measuring apparatus, measuring method and chemically mechanical polishing equipment |
| CN102398220A (en) * | 2011-11-21 | 2012-04-04 | 上海理工大学 | Device for measuring temperature of grinding area during plane grinding |
| CN102962770B (en) * | 2012-11-19 | 2015-01-14 | 南京航空航天大学 | Working state monitoring device for heat pipe grinding wheel and method for evaluating startup time and heat exchange performance of heat pipe grinding wheel |
| CN203069285U (en) * | 2012-12-18 | 2013-07-17 | 华侨大学 | Thermocouple applied to novel embedment method grinding temperature measurement |
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Inventor after: Zhao Zhengcai Inventor after: Fu Yucan Inventor after: Xu Jiuhua Inventor after: Zhang Zhiwei Inventor after: Ping Bo Inventor before: Fu Yucan Inventor before: Zhang Zhiwei Inventor before: Xu Jiuhua Inventor before: Zhao Zhengcai Inventor before: Ping Bo |
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