CN105651618A - Method for disposing thermocouple wires on test specimen - Google Patents
Method for disposing thermocouple wires on test specimen Download PDFInfo
- Publication number
- CN105651618A CN105651618A CN201610115413.3A CN201610115413A CN105651618A CN 105651618 A CN105651618 A CN 105651618A CN 201610115413 A CN201610115413 A CN 201610115413A CN 105651618 A CN105651618 A CN 105651618A
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- sample
- thermocouple wire
- positive
- thermocouple
- diplopore
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
- G01N3/18—Performing tests at high or low temperatures
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
- G01K7/02—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using thermoelectric elements, e.g. thermocouples
Abstract
The invention relates to a method for disposing thermocouple wires on a test specimen, in particular to application of the method to high-temperature compression test on a thermal simulated test machine. The method is applied to but not limited to the field of thermal/force simulation physical experiments. The method includes the steps of welding one ends of a pair of positive-and-negative-electrode thermocouple wires together by a spot welder; winding the welded positive-and-negative-electrode thermocouple wires around the test specimen radially, and enabling welded points of the welded positive-and negative-electrode thermocouple wires to be positioned at the radial bottom end of the test specimen approximately; enabling the two thermocouple wires to pass through a two-hole mass block so as to enable the positive-and negative-electrode thermocouple wires to well contact with the surface of the test specimen. The method has the advantages that since the thermocouple wires are wound around the test specimen, the problem that thermocouples are welded on some alloys difficultly, test success rate is increased, test cost is reduced and simplicity, convenience and feasibility in operation are achieved.
Description
Technical field
The present invention relates to a kind of method that thermocouple wire is configured at sample, on hot modeling test machine, particularly carry out the utilization in high temperature compressed test. Belong to heat/power analog physical experiment field.
Background technology
Thermal simulation experiment is the physical simulation techniques in materials hot working field, it is often referred to and utilizes smallclothes sample, material being heated in preparation or heating process is reproduced by means of certain assay device, or the physical process with stress of being simultaneously heated, fully and accurately expose and disclose material or the component tissue in hot procedure and performance variation law, evaluation or the prediction material produced problem when preparation or hot-working, for formulating rational processing technique and developing new material offer theoretical direction and technical basis, wherein, it is a very important ring in experimentation to accurately measuring of specimen temperature, on the general sample that thermocouple wire is welded with mash welder, but, when the sample of simulation test is very difficult to the material with sweating heat thermocouple wire, as: copper, aluminum, thermometric is just highly difficult, causes testing frequently failure and cannot be carried out, constrains the range of application of hot modeling test machine simultaneously.
Summary of the invention
The technical problem to be solved is, prior art is overcome to be difficult on the material of weldability difference, thermocouple welding be cannot be carried out temperature survey, a kind of thermocouple winding processing method to sample is provided, simple to operate, substantially increase success of the test rate, reduce experimentation cost, widen the range of application of hot modeling test machine.
This invention address that the technical scheme of above technical problem is: a kind of method that thermocouple wire is configured at sample, it is characterised in that comprise the steps:
1) one end spot welding machine of a pair both positive and negative polarity thermocouple wire is connected together;
2) being radially wound around sample by the both positive and negative polarity thermocouple wire after welding, the pad of the both positive and negative polarity thermocouple wire after welding is located substantially at the radial direction bottom of sample;
3) on the substantially top of sample radial direction, two thermocouple wires are through diplopore masses, and described diplopore mass is by extruding so that both positive and negative polarity thermocouple wire and specimen surface good contact;
4) both positive and negative polarity thermocouple wire is after described diplopore mass, is connected on thermocouple joint pin;
5) sample is heated.
As it is preferred that technical scheme, described diplopore mass is diplopore quartz ampoule or diplopore quartz ball.
As it is preferred that technical scheme, described step 4) is particularly as follows: both positive and negative polarity thermocouple wire is through after described diplopore mass, first enclosing around plastic ties one, then be connected on thermocouple joint pin, and meanwhile, plastic ties is to one pulling force of thermocouple wire.
As it is preferred that technical scheme, the thermocouple wire above quartz ampoule presss from both sides an alligator clamp, spacing for mass.
As it is preferred that technical scheme, sample holder, between the chuck of thermal simulation machine, makes sample hanging balancing.
As it is preferred that technical scheme, described sample is cylinder axis to compression sample, and specimen size meets, H is that sample is high, and D is specimen finish, and general sample is chosen as �� 8 �� 15mm.
As it is preferred that technical scheme, described step 2) in, both positive and negative polarity thermocouple wire is wound around a sample radially semi-perimeter respectively; And wound section thermocouple wire is exposed, exposed length is at least the half of girth.
As it is preferred that technical scheme, the aperture of described diplopore quartz ampoule is 0.5 ~ 1mm, and quartz ampoule height is 10 ~ 15mm.
As it is preferred that technical scheme, two supporting sticks in described plastic ties thermal modeling test case are tight.
As it is preferred that technical scheme, positional distance sample and the quartz ampoule contact point of described alligator clamp clamping thermocouple wire, h is that quartz ampoule is high, and D is specimen finish, and �� (%) is sample compress variation, ��=0 when only heating indeformable.
As it is preferred that technical scheme, in described step (5), sample heating is in a vacuum or carry out in protective atmosphere.
The invention has the beneficial effects as follows:
1) due to the fact that sample has been done winding process by thermocouple wire, replace thermocouple welding on sample, solve the thermometric problem of the material of solderability difference, make test can continue accurately to carry out, improve success of the test rate.
2) present invention reduces experimentation cost, easy to operation.
Accompanying drawing explanation
Fig. 1 is that the present invention is wound around process front schematic view;
Fig. 2 is that the present invention is wound around process side schematic view;
Fig. 3 is wound around processing and normal weld specimen temperature comparison diagram.
Detailed description of the invention
As being explained further of technical solution of the present invention is non-limiting, a kind of specific embodiment is as follows: a kind of method that thermocouple wire is configured at sample, comprises the following steps that
1) one end spot welding machine of a pair both positive and negative polarity thermocouple wire is connected together;
2) pad of two thermocouple wires is positioned over the radial direction bottom of sample;
3) two thermocouple wires are radially wound rotating around sample;
4) at the other end of sample radial direction, two thermocouple wire one diplopore quartz ampoules of traverse; Diplopore quartz ampoule is by extruding so that thermocouple wire and specimen surface good contact;
5) two thermocouple wires are after diplopore quartz ampoule, enclose around plastic ties one, are connected on thermocouple joint pin, and meanwhile, plastic ties is to one pulling force of thermocouple wire.
6) sample heating in a vacuum or carries out in protective atmosphere.
7) thermocouple wire between quartz ampoule and plastic ties presss from both sides an alligator clamp as movable spacing of quartz ampoule.
8) sample holder is between the chuck of thermal simulation machine, makes sample hanging balancing.
Further: the voltage of two thermocouples of welding is 20 ~ 30 volts, and pad is firm.
Further: sample is cylinder axis to compression sample, and specimen size meets, H is that sample is high, and D is specimen finish, and general sample is chosen as �� 8 �� 15mm.
Further: to be radially wound around sample, it is necessary to two thermocouples are wound around a sample radially semi-perimeter respectively; And wound section thermocouple wire is exposed, exposed length is at least the half of girth.
Further: the aperture of diplopore quartz ampoule is 0.5 ~ 1mm, quartz ampoule height is 10 ~ 15mm.
Further: two supporting sticks in plastic ties thermal modeling test case are tight, and plastic ties can not be excessive to the pulling force of thermocouple wire.
Further: sample heating vacuum less than 13.3Pa, or, be filled with the argon of purity > 99%, flow-control > 3 ls/h.
Further: the positional distance sample of alligator clamp clamping thermocouple wire and quartz ampoule contact point, h is that quartz ampoule is high, and D is specimen finish, and �� (%) is sample compress variation, ��=0 when only heating indeformable.
Wherein, concrete operation method and parameter are as follows:
The Q235B steel of composition such as table 1 is processed into the cylinder sample 1 of �� 8 �� 15mm, one end of positive and negative two K type thermocouples 4 is welded together under HotspotII20-A10240 type thermocouple welding machine, weldingvoltage selects 25V, check after welding and confirm firm welding, one end part enamel covering welded by thermocouple wire 4 removes, ensure exposed length 35mm, the pad of two thermocouple wires 4 is positioned over the radial direction bottom of sample 1, two thermocouple wires 4 are radially wound rotating around sample 1 and at the sample other end radially through a diplopore quartz ampoule 3, quartz ampoule 3 aperture 0.5mm, high 10mm, extruding quartz ampoule 3, ensure bare thermocouple 4 and sample 1 good surface contact, thermocouple 4 is enclosed around plastic ties 2 one, connect TC1 thermometric passage, plastic ties 2 is tight on two supporting sticks 5, the pulling force that thermocouple 4 is certain, adjacent quartz ampoule other end alligator clamp 6 clamps thermocouple wire, carries out spacing to quartz ampoule, meanwhile, welding a pair thermocouple 4 again in sample 1 bottom, connect TC2 thermometric passage, measure at the enterprising trip temperature of Gleeble-1500D hot modeling test machine, sample holder, between pressure head 7, solves hanging balancing problem, ensures electrified regulation simultaneously, first, it is evacuated to 13.3Pa, with 20 DEG C/s heating sample 1 to 1200 DEG C, then heats to 1300 DEG C with 5 DEG C/s, it is incubated 60 seconds, it is cooled to 1200 DEG C with 10 DEG C/s, stops heating, read experimental data, contrast adopts winding to process the temperature TC1 measured and the temperature TC2 of normal weld thermocouple 4 measurement, as it is shown on figure 3, TC1 and TC2 is completely superposed, the thermometric that winding processes is accurately and reliably.
Chemical composition (WB) Table1ChemicalcompositionofQ235Bslab of table 1Q235B steel curved beam
| Element C Si Mn P S Cu Ni Cr |
| Content (%) ��0.20 ��0.35 ��1.40 ��0.045 ��0.045 ��0.30 ��0.30 ��0.30 |
Claims (10)
1. the method that thermocouple wire is configured at sample, it is characterised in that comprise the steps:
1) one end spot welding machine of a pair both positive and negative polarity thermocouple wire is connected together;
2) being radially wound around sample by the both positive and negative polarity thermocouple wire after welding, the pad of the both positive and negative polarity thermocouple wire after welding is located substantially at the radial direction bottom of sample;
3) on the substantially top of sample radial direction, two thermocouple wires are through diplopore masses, and described diplopore mass is by extruding so that both positive and negative polarity thermocouple wire and specimen surface good contact;
4) both positive and negative polarity thermocouple wire is after described diplopore mass, is connected on thermocouple joint pin;
5) sample is heated.
2. the method that thermocouple wire is configured at sample according to claim 1, it is characterised in that described diplopore mass is diplopore quartz ampoule or diplopore quartz ball.
3. the method that thermocouple wire is configured at sample according to claim 1, it is characterized in that, described step 4) is particularly as follows: both positive and negative polarity thermocouple wire is after described diplopore mass, first enclose around plastic ties one, it is connected on thermocouple joint pin again, meanwhile, plastic ties is to one pulling force of thermocouple wire.
4. the method that thermocouple wire is configured at sample according to claim 1, it is characterised in that press from both sides an alligator clamp on the thermocouple wire above quartz ampoule, spacing for mass.
5. the method that thermocouple wire is configured at sample according to claim 1, it is characterised in that sample holder, between the chuck of thermal simulation machine, makes sample hanging balancing.
6. the method that thermocouple wire is configured at sample according to claim 1, it is characterised in that described sample is cylinder axis to compression sample, and specimen size meets, H is that sample is high, and D is specimen finish, and general sample is chosen as �� 8 �� 15mm.
7. the method that thermocouple wire is configured at sample according to claim 1, it is characterised in that described step 2) in, both positive and negative polarity thermocouple wire is wound around a sample radially semi-perimeter respectively; And wound section thermocouple wire is exposed, exposed length is at least the half of girth.
8. the method that thermocouple wire is configured at sample according to claim 2, it is characterised in that the aperture of described diplopore quartz ampoule is 0.5 ~ 1mm, quartz ampoule height is 10 ~ 15mm.
9. the method that thermocouple wire is configured at sample according to claim 4, it is characterised in that the positional distance sample of described alligator clamp clamping thermocouple wire and quartz ampoule contact point, h is that quartz ampoule is high, and D is specimen finish, and �� (%) is sample compress variation, ��=0 when only heating indeformable.
10. the method that thermocouple wire is configured at sample according to claim 1, it is characterised in that in described step (5), sample heating in a vacuum or carries out in protective atmosphere.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610115413.3A CN105651618B (en) | 2016-03-01 | 2016-03-01 | A method of thermocouple wire is configured at sample |
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| CN201610115413.3A CN105651618B (en) | 2016-03-01 | 2016-03-01 | A method of thermocouple wire is configured at sample |
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| CN105651618B CN105651618B (en) | 2018-09-18 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107966351A (en) * | 2017-11-20 | 2018-04-27 | 内蒙古科技大学 | A kind of method for carrying out parcel processing to sample using nickel screen |
| CN108279074A (en) * | 2018-01-24 | 2018-07-13 | 内蒙古科技大学 | A kind of thermocouple fixing device and its application method |
| CN108387458A (en) * | 2018-05-04 | 2018-08-10 | 中国科学院苏州纳米技术与纳米仿生研究所 | Carbon nano-tube fibre mechanical property testing system at high operating temperatures and method |
| CN113358693A (en) * | 2021-06-02 | 2021-09-07 | 西北有色金属研究院 | Method for testing beta transition temperature of titanium alloy |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107966351A (en) * | 2017-11-20 | 2018-04-27 | 内蒙古科技大学 | A kind of method for carrying out parcel processing to sample using nickel screen |
| CN107966351B (en) * | 2017-11-20 | 2020-07-14 | 内蒙古科技大学 | Method for wrapping sample by using nickel net |
| CN108279074A (en) * | 2018-01-24 | 2018-07-13 | 内蒙古科技大学 | A kind of thermocouple fixing device and its application method |
| CN108387458A (en) * | 2018-05-04 | 2018-08-10 | 中国科学院苏州纳米技术与纳米仿生研究所 | Carbon nano-tube fibre mechanical property testing system at high operating temperatures and method |
| CN113358693A (en) * | 2021-06-02 | 2021-09-07 | 西北有色金属研究院 | Method for testing beta transition temperature of titanium alloy |
| CN113358693B (en) * | 2021-06-02 | 2024-03-22 | 西北有色金属研究院 | Method for testing beta transition temperature of titanium alloy |
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