CN104236738B - In a kind of the real time measure directional solidification process in formwork temperature system and method - Google Patents
In a kind of the real time measure directional solidification process in formwork temperature system and method Download PDFInfo
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- CN104236738B CN104236738B CN201410511126.5A CN201410511126A CN104236738B CN 104236738 B CN104236738 B CN 104236738B CN 201410511126 A CN201410511126 A CN 201410511126A CN 104236738 B CN104236738 B CN 104236738B
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- directional solidification
- terminal pad
- formwork
- copper
- thermocouple
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Abstract
The invention provides the real-time temperature measurement system and method for a kind of directional solidification furnace high temperature alloy temperature in formwork in heating, insulation, draw process.Temp measuring system includes thermocouple, fixing device, terminal pad, wire, data recording equipment, and thermocouple includes two earthenwares of thickness and Type B thermocouple wire, and crude pottery porcelain tube is single hole, thin ceramic tubes are diplopore；Fixing device is fixed in the water cooled copper plate of directional solidification furnace, there is two clips up and down thereon；Terminal pad includes steel flange disk, copper post, clamp nut, seal sleeve, sealing shroud, sealing ring；Wire is conductive copper wire；Digital data recording system is multichannel, polymorphic type moisture recorder.The temp measuring system cost is low, and precision is high, solves in directional solidification process that temperature field is not easy the problem determined in formwork, and the data of record can export, be easy to study.
Description
Technical field
The present invention relates to directional solidification temperature detection technical field, more particularly in formwork in a kind of directional solidification process
The system and method for high temperature alloy temperature the real time measure.
Background technology
With the development of aero-engine and gas turbine manufacturing technology, manufacture high-performance, the directional solidification leaf of long-life
Piece turns into one of key technology of China's new and high technology manufacturing industry development；And the application of single crystal super alloy blade, make aviation
Temperature increases substantially before engine turbine, and thrust increase, oil consumption reduces；In directional solidification process, change of temperature field is to list
The growth of brilliant blade plays conclusive effect, and in directional solidification process in formwork the measure of high temperature alloy real time temperature to temperature
It is vital to spend field control technology.
At present, the conventional thermometric mode of molten metal thermometric, one kind is indirect type thermometric, i.e., by peep hole, with optics height
Temperature meter, infrared radiation thermometer, the temperature on indirect determination molten metal surface, such a thermometric mode is by environment (such as material of peep hole glass
Matter, attachment dirt, the molten condition of liquid level etc. condition) influence, the temperature measured all is aluminium alloy surface temperature, is not only measured
Resultant error is larger, and can not obtain aluminium alloy internal temperature；Another kind is direct-type thermometric, i.e., temperature measuring equipment（Generally
Armoured thermocouple）It is inserted into inside aluminium alloy and carries out thermometric, such a temp measuring method is influenceed smaller, accuracy height by thermometric environment.
But directional solidification process, all in directional solidification furnace, in formwork, thermocouple needs to insert in formwork high temperature alloy melt cast
It is allowed to contact with aluminium alloy, it is very thick that finished product armoured thermocouple protection pipe is sold in market, it is difficult to meet to close in directional solidification formwork
The thermometric requirement of golden liquid.
The present invention is directed in directional solidification process conjunction high temperature alloy liquid in formwork and is not easy measured present situation and develops, and has
It is simple and practical, cost is low, accuracy is high, temperature-measuring range is big（200℃~1800℃）The advantages that, and high temperature can be carried out for a long time
Measurement, obtain directional solidification process in alloy internal temperature field real-time change, to research directional solidification process temperature field and its
Control to oriented freezing organization, optimize technique, improve oriented freezing organization performance and all play an important roll.
The content of the invention
It is an object of the invention to provide a kind of the real time measure directional solidification inexpensive, simple and practical, measurement accuracy is high
During in formwork high temperature alloy temperature system and method.
The temp measuring system that the present invention uses, including thermocouple, fixing device, terminal pad and information collecting device.
（1）Thermocouple is made up of thickness two pure corundum ceramic pipes and Type B thermocouple wire, and thermocouple wire insertion diplopore is carefully made pottery
Porcelain tube, diplopore thin ceramic tubes one end thermocouple wire both positive and negative polarity weld together, and single hole crude pottery porcelain tube one end is welded, and is enclosed on thermocouple
One end of silk both positive and negative polarity diplopore thin ceramic tubes welded together, single hole crude pottery porcelain tube are shorter than thin ceramic tubes 2-3cm.
Wherein Type B thermocouple wire thickness is excessively thick to influence orientation almost without influence, meticulous influence service life on temperature measurement accuracy
Solidification, 0.15 ~ 0.6mm specifications typically may be selected.
Earthenware can not be excessively thick, slightly influences directional solidification excessively, and crude pottery porcelain tube used is single hole, optional 0.5 ~ 1.3mm of internal diameter,
1 ~ 2.5mm of external diameter；Thin ceramic tubes are diplopore, optional 0.2 ~ 0.7mm of internal diameter, 1 ~ 2mm of external diameter；When selecting, thickness earthenware wants phase
Matching, while also to be matched with thermocouple wire.
（2）Thermocouple lower end is fixed in the water cooled copper plate of directional solidification furnace by fixing device, and orientation is then inserted in upper end
It is allowed in the formwork of solidification and molten metal contacts.
（3）Terminal pad is made up of steel flange disk, copper post, clamp nut, sealing shroud, seal sleeve, sealing ring.
Terminal pad has two, and the first terminal pad is screwed on directional solidification drawing device in directional solidification furnace；
Second terminal pad is screwed at directional solidification furnace thermometer hole.
In copper post insertion steel flange disk preformed hole, the fastening, seal in copper post are symmetrical above and below, copper post top half
Two clamp nuts, sealing shroud, sealing ring, seal sleeves are followed successively by, as shown in Figure 3；Sealing ring is rubber ring, sealing shroud and close
Big envelope cylinder is made up of insulating materials；Thermocouple both positive and negative polarity wire is connected on two prominent copper posts of terminal pad upper surface in stove respectively
On, fixed by clamp nut.
（4）Wire may be selected to be 0.5 to 3 square of fire resisting copper conductor, and the end of copper conductor both positive and negative polarity one is connected under the first terminal pad
In the prominent copper post of two of surface, the other end is connected at stove thermometer hole in the second terminal pad inner surface copper post, the second connection
Disk outer surface copper post is connected by copper conductor with data recording equipment.
（5）Digital data recording system is the moisture recorder that multichannel, polymorphic type, data recording frequency maximum will reach 1 second.
The fixing device is made up of commercially available common iron pipe card and stainless steel clip, and iron pipe card size is by directional solidification furnace water
Cold copper dish determine that iron pipe card is stuck in water cooled copper plate, and stainless steel clip is fixed on iron pipe card with copper wire, can adjust folder at any time
The position of son, in order to preferably fix two earthenwares；The upper clip of stainless steel clip fixes single hole crude pottery porcelain tube, stainless steel
The lower clip of clip fixes diplopore thin ceramic tubes.
Technical scheme has the following advantages that shown in the present invention：Realize in directional solidification process to high temperature alloy temperature in formwork
The long-time tracking of field, data recording equipment are 1 second to the intra-record slack byte of temperature, can accurately record whole process of setting medium temperature
Spend each details of field change；It is simple and practical, cost is low, precision is high.
Brief description of the drawings
Fig. 1 is the schematic diagram of high temperature alloy temperature system in formwork in the real time measure directional solidification process.
Fig. 2 is thermocouple schematic diagram.
Fig. 3 is terminal pad schematic diagram.
In figure：It is thin that 1. crude pottery porcelain tube is welded end, 2. thermocouple wire both positive and negative polarity pads, 3. single hole crude pottery porcelain tubes, 4. diplopores
Earthenware, 5. positive pole thermocouple wires, the fixing device of 6. negative pole thermocouple wire 7., 8. sealing shrouds, the clamp nut of 9. copper post 10., 11.
The seal sleeve of steel flange disk 12., 13. sealing rings, 14. funnels, 15. upper furnace bodies, 16. muff heaters, 17. data are adopted
Acquisition means, 18. formworks, 19. thermocouples, 20. second terminal pads, 21. water cooled copper plates, 22. first terminal pads, 23. copper conductors,
24. lower furnace body.
Embodiment
The invention will be further described below in conjunction with the accompanying drawings.
The technical solution adopted by the present invention, including thermocouple, fixing device, terminal pad, wire, data recording equipment.
Thermocouple includes single hole crude pottery porcelain tube 3, diplopore thin ceramic tubes 4 and Type B thermocouple wire, crude pottery porcelain tube is welded end 1, heat
Thermocouple wire both positive and negative polarity pad 2；Fixing device 7 is fixed in the water cooled copper plate of directional solidification furnace, there is fixed thickness ceramics thereon
Two clips up and down of pipe；First terminal pad 22 is fixed on directional solidification furnace drawing device, and the second terminal pad 20 is fixed on fixed
To at the thermometer hole of consolidation furnace, terminal pad includes sealing shroud 8, copper post 9, clamp nut 10, steel flange disk 11, seal sleeve
12nd, sealing ring 13.
The present embodiment uses diameter 0.2mm Type B thermocouple wire, the external diameter 2.5mm of single hole crude pottery porcelain tube 3, internal diameter
1.3mm；The external diameter of diplopore thin ceramic tubes 4 is 1.2mm, internal diameter 0.3mm；Thermocouple wire both positive and negative polarity inserts diplopore respectively in thermocouple
Thin ceramic tubes 4, one end thermocouple wire both positive and negative polarity of diplopore thin ceramic tubes 4 are welded together to form thermocouple wire both positive and negative polarity pad 2,
The one end of single hole crude pottery porcelain tube 3, which is welded, to be formed crude pottery porcelain tubes and is welded end 1, and it is thin to be enclosed on thermocouple wire both positive and negative polarity diplopore welded together
The one end of earthenware 4（Crude pottery porcelain tube is shorter than thin ceramic tubes 2-3cm）, both positive and negative polarity pad is protected, the one end for being cased with crude pottery porcelain tube is inserted
Enter formwork；Fixing device 7 is fixed in the water cooled copper plate of directional solidification furnace, single hole crude pottery porcelain tube 3 by fixing device upper clip
Fixed, diplopore thin ceramic tubes 4 are fixed by the lower clip of fixing device；Thermocouple other end both positive and negative polarity thermocouple wire is connected on respectively
In the prominent copper post 9 of two of the upper surface of one terminal pad 22, fixed by clamp nut；Copper conductor 23 is 1.5 squares of fireproof mica copper
Wire, the end of copper conductor both positive and negative polarity one are connected in two prominent copper posts 9 of the lower surface of the first terminal pad 22, and the other end is connected to second
In the inner surface copper post 9 of terminal pad 20, the outer surface copper post 9 of the second terminal pad 20 is connected by copper conductor 23 and data acquisition device 17
Connect, EX4B-10 moisture recorder of the data acquisition device 17 from Shanghai Dahua Instrument and Meter Plant's production.
The course of work of the present apparatus：Before directional solidification stove evacuation, first fixing device and terminal pad are fixed, then
Formwork is put into water cooled copper plate, then appropriate location in one end insertion formwork that crude pottery porcelain tube is welded, the crude pottery porcelain tube other end lead to
The upper clip for crossing fixing device is fixed, and the thin ceramic tubes with thermocouple wire solder joint are gently then inserted crude pottery porcelain tube, is ensured
Thermocouple wire solder joint does not contact with crude pottery porcelain tube in thin ceramic tubes, and then the thin ceramic tubes other end passes through the lower folder in fixing device
Son is fixed；The thermocouple wire that the thin ceramic tubes other end stretches out is connected in two prominent copper posts of the first terminal pad upper surface respectively,
Fixed by clamp nut；The end of copper conductor both positive and negative polarity one is connected in two prominent copper posts of the first terminal pad lower surface, and the other end connects
It is connected in the second terminal pad inner surface copper post, the second terminal pad outer surface copper post is connected by copper conductor with data recording equipment；
Directional solidification furnace is started working, and when the muff heater in stove is started working, opens data acquisition device, temperature is increased to
At 200 DEG C, thermocouple is started working, and data acquisition device starts gathered data, while can be on the liquid crystal display of device
Temperature is observed, data copy is gone out to be analyzed after terminating.
Claims (9)
1. in a kind of the real time measure directional solidification process in formwork temperature system, it is characterised in that：The system includes thermoelectricity
Idol, fixing device, terminal pad and information collecting device；
Thermocouple is made up of thickness two pure corundum ceramic pipes and Type B thermocouple wire, thermocouple wire insertion diplopore thin ceramic tubes, double
The thermocouple wire both positive and negative polarity of hole thin ceramic tubes one end welds together, and single hole crude pottery porcelain tube one end is welded, and is being enclosed on thermocouple wire just
One end of negative pole diplopore thin ceramic tubes welded together, single hole crude pottery porcelain tube are shorter than thin ceramic tubes；
Thermocouple lower end is fixed in the water cooled copper plate of directional solidification furnace by fixing device, and directional solidification is then inserted in upper end
It is allowed in formwork and molten metal contacts；
Terminal pad has two, and the first terminal pad is fixed on directional solidification drawing device in directional solidification furnace；Second terminal pad
It is fixed at directional solidification furnace thermometer hole；
The one end of thermocouple both positive and negative polarity wire respectively with the first terminal pad is connected；The other end of first terminal pad then passes through wire
It is connected with one end of the second terminal pad；The other end of second terminal pad is then connected by wire with data recording equipment.
2. in a kind of the real time measure directional solidification process as claimed in claim 1 in formwork temperature system, it is characterised in that：
The fixing device is made up of commercially available common iron pipe card and stainless steel clip, and iron pipe card size is true by directional solidification furnace water cooled copper plate
Fixed, iron pipe card is stuck in water cooled copper plate, and stainless steel clip is fixed on iron pipe card with copper wire, and the upper clip of stainless steel clip is fixed
Single hole crude pottery porcelain tube, the lower clip of stainless steel clip fix diplopore thin ceramic tubes, can adjust the position of clip at any time, in order to
Preferably fix two earthenwares.
3. in a kind of the real time measure directional solidification process as claimed in claim 1 in formwork temperature system, it is characterised in that：
Single hole crude pottery porcelain tube is shorter than thin ceramic tubes 2-3cm.
4. in a kind of the real time measure directional solidification process as claimed in claim 1 in formwork temperature system, it is characterised in that：
Terminal pad is made up of steel flange disk, copper post, clamp nut, sealing shroud, seal sleeve, sealing ring；Copper post inserts stainless steel
In ring flange preformed hole, the fastener and seal in copper post are symmetrical above and below, copper post top half be followed successively by two clamp nuts,
Sealing shroud, sealing ring, seal sleeve；Sealing ring is made up of rubber ring, sealing shroud and seal sleeve of insulating materials；Thermocouple is just
Negative metal silk is connected in two prominent copper posts of terminal pad upper surface in stove respectively, is fixed by clamp nut.
5. in a kind of the real time measure directional solidification process as claimed in claim 1 in formwork temperature system, it is characterised in that：
Wire selection is 0.5 to 3 square of fire resisting copper conductor, and the end of copper conductor both positive and negative polarity one is connected on two protrusions of the first terminal pad lower surface
In copper post, the other end is connected at stove thermometer hole in the second terminal pad inner surface copper post, and the second terminal pad outer surface copper post is led to
Copper conductor is crossed to be connected with data recording equipment.
6. in a kind of the real time measure directional solidification process as claimed in claim 1 in formwork temperature system, it is characterised in that：
The digital data recording system is the moisture recorder that multichannel, polymorphic type, data recording frequency maximum will reach 1 second.
7. in a kind of the real time measure directional solidification process as claimed in claim 1 in formwork temperature system, it is characterised in that：
The Type B thermocouple wire selects 0.15~0.6mm specifications.
8. in a kind of the real time measure directional solidification process as claimed in claim 1 in formwork temperature system, it is characterised in that：
Crude pottery porcelain tube used is single hole, 0.5~1.3mm of internal diameter, 1~2.5mm of external diameter；Thin ceramic tubes are diplopore, 0.2~0.7mm of internal diameter,
1~2mm of external diameter；When selecting, thickness earthenware will match, while also be matched with thermocouple wire.
9. using the method for temperature in formwork in system the real time measure directional solidification process as claimed in claim 1, its feature exists
In comprising the following steps that：Before directional solidification stove evacuation, first fixing device and terminal pad are fixed, formwork is then put into water
In cold copper dish, then appropriate location in one end insertion formwork that crude pottery porcelain tube is welded, the crude pottery porcelain tube other end pass through fixing device
Upper clip fix, the thin ceramic tubes with thermocouple wire solder joint are gently then inserted crude pottery porcelain tube, ensured in thin ceramic tubes
Thermocouple wire solder joint is not contacted with crude pottery porcelain tube, and then the thin ceramic tubes other end is fixed by the lower clip in fixing device；Carefully
The thermocouple wire that the earthenware other end stretches out is connected in two prominent copper posts of the first terminal pad upper surface respectively, by clamp nut
It is fixed；The end of copper conductor both positive and negative polarity one is connected in two prominent copper posts of the first terminal pad lower surface, and the other end is connected to the second company
Connect in disk inner surface copper post, the second terminal pad outer surface copper post is connected by copper conductor with data recording equipment；Directional solidification furnace
Start working, when the muff heater in stove is started working, open data acquisition device, when temperature is increased to 200 DEG C, heat
Galvanic couple is started working, and data acquisition device starts gathered data, while temperature can be observed on the liquid crystal display of device, knot
Data copy is gone out to be analyzed after beam.
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| CN201410511126.5A CN104236738B (en) | 2014-09-29 | 2014-09-29 | In a kind of the real time measure directional solidification process in formwork temperature system and method |
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| CN201410511126.5A CN104236738B (en) | 2014-09-29 | 2014-09-29 | In a kind of the real time measure directional solidification process in formwork temperature system and method |
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| CN104236738B true CN104236738B (en) | 2018-02-27 |
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| CN111889653A (en) * | 2020-07-27 | 2020-11-06 | 山东鑫聚龙动力科技集团有限公司 | Temperature measuring device for inner formwork of vacuum furnace |
| CN112338152B (en) * | 2020-11-24 | 2022-05-06 | 沈阳铸造研究所有限公司 | Method for measuring temperature of liquid metal cooling directional solidification casting and shell |
| CN113029373A (en) * | 2021-05-07 | 2021-06-25 | 西安医学院 | Structure for testing temperature in metal solidification process in formwork and measuring method thereof |
| CN113351829A (en) * | 2021-05-26 | 2021-09-07 | 泰州市金鹰精密铸造有限公司 | Manufacturing process and testing method of single crystal blade |
| CN114235287A (en) * | 2021-11-18 | 2022-03-25 | 五冶集团上海有限公司 | Method and device for evaluating wall-through leakage of heating wall of coke oven |
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| SU1348056A1 (en) * | 1985-07-26 | 1987-10-30 | Предприятие П/Я В-2190 | Line moulding box |
| JP3121672B2 (en) * | 1992-04-17 | 2001-01-09 | 昭和電線電纜株式会社 | Monitoring and measuring device for mold temperature |
| US6631752B2 (en) * | 2000-06-29 | 2003-10-14 | Diecast Software Inc. | Mathematically determined solidification for timing the injection of die castings |
| CN101722296B (en) * | 2009-11-26 | 2011-08-17 | 上海大学 | Physical simulation method and physical simulation device utilizing suction casting to research solidification of strip continuous casting |
| CN201637498U (en) * | 2010-04-22 | 2010-11-17 | 北京航天计量测试技术研究所 | Composite tube type high temperature thermocouple |
| CN101927335B (en) * | 2010-08-06 | 2012-08-22 | 清华大学 | Mold capable of measuring internal temperature of castings directly in extrusion casting process |
| CN102192797B (en) * | 2011-04-14 | 2012-11-14 | 西北工业大学 | Smelting temperature measuring device for directional solidification |
| CN202133485U (en) * | 2011-05-05 | 2012-02-01 | 北京华海中谊工业炉有限公司 | Thermocouple double layer seal structure |
| CN102759416B (en) * | 2012-07-19 | 2013-11-13 | 中国科学院金属研究所 | Continuous temperature measuring device and method during directional solidification |
| CN102935506B (en) * | 2012-11-08 | 2014-11-26 | 哈尔滨工业大学 | Continuous suspension type directional solidification casting device of cold crucible |
| CN203469210U (en) * | 2013-09-10 | 2014-03-12 | 吕绍江 | Stomach tube with air bag |
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