CN105651618B - A method of thermocouple wire is configured at sample - Google Patents
A method of thermocouple wire is configured at sample Download PDFInfo
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- CN105651618B CN105651618B CN201610115413.3A CN201610115413A CN105651618B CN 105651618 B CN105651618 B CN 105651618B CN 201610115413 A CN201610115413 A CN 201610115413A CN 105651618 B CN105651618 B CN 105651618B
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- sample
- thermocouple wire
- thermocouple
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- quartz ampoule
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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
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- 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 present invention relates to a kind of methods that thermocouple wire is configured at sample, and the utilization in high temperature compressed experiment is carried out especially on hot modeling test machine.Using but be not limited to heat/power analog physical experimental field.Step is that one end of a pair of of positive and negative anodes thermocouple wire is connected together with spot welding machine；Positive and negative anodes thermocouple wire after welding is radially wound around sample, the pad of the positive and negative anodes thermocouple wire after welding is located substantially at the radial bottom end of sample；Two thermocouple wires pass through a diplopore mass block so that positive and negative anodes thermocouple wire is well contacted with specimen surface.The present invention solves the problems, such as, for being difficult to solder to thermocouple on certain some alloy, to improve success of the test rate, reduction experimentation cost is easy to operation since thermocouple is wound processing to sample.
Description
Technical field
The present invention relates to a kind of methods that thermocouple wire is configured at sample, are carried out especially on hot modeling test machine high
Utilization in warm compression test.Belong to heat/power analog physical experimental field.
Background technology
Thermal simulation experiment is the physical simulation techniques in materials hot working field, is often referred to utilize smallclothes sample, by Mr. Yu
Experimental rig reproduces physical process heated, or be simultaneously heated with stress of the material in preparation or heating process, fully smart
Really exposure is being made with the tissue and performance variation law of material or component in hot procedure, evaluation or prediction material is disclosed
Problem when standby or hot-working, for formulate rational processing technology and develop new material provide theoretical direction and technology according to
According to, wherein the accurate measurement to specimen temperature is a very important ring in experimentation, generally by thermocouple wire mash welder
On the sample of welding；However, when the sample of simulation test is very difficult to the material to weld thermocouple wire, such as：Copper, aluminium are surveyed
Temperature is just highly difficult, leads to test frequently failure and can not carry out, while constraining the application range of hot modeling test machine.
Invention content
The technical problem to be solved by the present invention is to overcome the prior art to be difficult to thermocouple welding in weldability difference
It can not be measured into trip temperature on material, a kind of winding processing method of thermocouple to sample is provided, it is easy to operate, it greatly improves
Success of the test rate, reduces experimentation cost, has widened the application range of hot modeling test machine.
The technical solution that the present invention solves the above technical problem is：A method of thermocouple wire is configured at sample,
It is characterized in that, includes the following steps：
1）One end of a pair of of positive and negative anodes thermocouple wire is connected together with spot welding machine；
2）Positive and negative anodes thermocouple wire after welding is radially wound around sample, the positive and negative anodes thermocouple wire after welding
Pad is located substantially at the radial bottom end of sample；
3）On the substantially top of sample radial direction, two thermocouple wires pass through a diplopore mass block, the diplopore mass block
Pass through extruding so that positive and negative anodes thermocouple wire is well contacted with specimen surface；
4）After positive and negative anodes thermocouple wire passes through the diplopore mass block, it is connected on thermocouple connecting pole；
5）Sample is heated.
As further preferred technical solution, the diplopore mass block is diplopore quartz ampoule or diplopore quartz ball.
As further preferred technical solution, the step 4）Specially：Positive and negative anodes thermocouple wire passes through the diplopore
After mass block, first enclosed around plastic ties one, then be connected on thermocouple connecting pole, meanwhile, plastic ties give thermocouple wire one pulling force.
As further preferred technical solution, a crocodile clip is pressed from both sides on the thermocouple wire above quartz ampoule, is used for quality
The limit of block.
As further preferred technical solution, sample holder makes sample hanging balancing between the collet of thermal simulation machine.
As further preferred technical solution, the sample is that cylinder is compressed axially sample, and specimen size meets, H is that sample is high, and D is specimen finish, and general sample is selected as 8 × 15mm of Φ.
As further preferred technical solution, the step 2）In, positive and negative anodes thermocouple wire winds sample radial direction respectively
One semi-perimeter；And wound section thermocouple wire is exposed, exposed length is at least the half of perimeter.
As further preferred technical solution, the aperture of the diplopore quartz ampoule is 0.5 ~ 1mm, quartz ampoule a height of 10 ~
15mm。
As further preferred technical solution, two supporting sticks tight of the plastic ties in thermal modeling test case
Come.
As further preferred technical solution, the positional distance sample and quartz ampoule of the crocodile clip clamping thermocouple wire
Contact point,hFor quartz ampoule height, D is specimen finish, ε（%）For sample compression deformation, only heat not
ε=0 when deformation.
As further preferred technical solution, the step（5）In, sample heating in a vacuum or in protective atmosphere into
Row.
The beneficial effects of the invention are as follows：
1）The present invention is since thermocouple wire has done winding processing to sample, instead of on sample, solving thermocouple welding
The thermometric problem of the material of solderability difference, allows experiment to continue accurately to carry out, improves success of the test rate.
2）The present invention reduces experimentation cost, easy to operation.
Description of the drawings
Fig. 1 is present invention winding processing front schematic view；
Fig. 2 is present invention winding processing side schematic view；
Fig. 3 is wound around processing and normal weld specimen temperature comparison diagram.
Specific implementation mode
As non-limiting to being explained further for technical solution of the present invention, a kind of specific embodiment is as follows：It is a kind of
The method that thermocouple wire is configured at sample, including steps are as follows：
1）One end of a pair of of positive and negative anodes thermocouple wire is connected together with spot welding machine；
2）The pad of two thermocouple wires is positioned over to the radial bottom end of sample；
3）Two thermocouple wires are radially wound rotating around sample；
4）In the other end of sample radial direction, two thermocouple wires pass through a diplopore quartz ampoule；Diplopore quartz ampoule is by squeezing
Pressure so that thermocouple wire and specimen surface well contact；
5）After two thermocouple wires pass through diplopore quartz ampoule, encloses, be connected on thermocouple connecting pole around plastic ties one, meanwhile,
Plastic ties give thermocouple wire one pulling force.
6）Sample heating carries out in a vacuum or in protective atmosphere.
7）A crocodile clip is pressed from both sides on thermocouple wire between quartz ampoule and plastic ties as the movable limit of quartz ampoule.
8）Sample holder makes sample hanging balancing between the collet of thermal simulation machine.
Further：The voltage for welding two thermocouples is 20 ~ 30 volts, and pad is secured.
Further：Sample is that cylinder is compressed axially sample, and specimen size meets, H is that sample is high, D
For specimen finish, general sample is selected as 8 × 15mm of Φ.
Further：It is radially wound around sample, it is necessary to which two thermocouples wind the radial semi-perimeter of sample respectively；And it twines
Around part, thermocouple wire is exposed, and exposed length is at least the half of perimeter.
Further：The aperture of diplopore quartz ampoule is 0.5 ~ 1mm, a height of 10 ~ 15mm of quartz ampoule.
Further：Two supporting sticks in plastic ties thermal modeling test case are tight, and plastic ties are to thermocouple wire
Pulling force cannot be excessive.
Further：The vacuum degree of sample heating is less than 13.3Pa, alternatively, it is filled with the argon gas of purity ＞ 99%, flow control ＞
3 ls/h.
Further：The positional distance sample and quartz ampoule contact point of thermocouple wire is clamped in crocodile clip,hFor quartz ampoule height, D is specimen finish, ε（%）For sample compression deformation, ε=0 when only heating indeformable.
Wherein, concrete operation method and parameter are as follows：
The Q235B steel of ingredient such as table 1 is processed into the cylinder sample 1 of 8 × 15mm of Φ；By positive and negative two K-type thermocouples 4
One end welds together under Hotspot II 20-A10240 type thermocouple welding machines, and weldingvoltage selects 25V, is examined after welding
Confirmation firm welding is looked into, one end part enamel covering that thermocouple wire 4 welds is removed, ensures exposed length 35mm, two thermoelectricity
The pad of thermo wires 4 is positioned over the radial bottom end of sample 1, and two thermocouple wires 4 are wound and are trying rotating around 1 radial direction of sample
The other end of sample radial direction passes through a diplopore quartz ampoule 3, quartz ampoule 3 aperture 0.5mm, high 10mm to squeeze quartz ampoule 3, ensures naked
Reveal thermocouple 4 and 1 good surface contact of sample, thermocouple 4 is enclosed around plastic ties 2 one, connection TC1 thermometrics channel, plastic ties 2 are tight
It stretches tight on two supporting sticks 5, the pulling force certain to thermocouple 4；Closely quartz ampoule other end crocodile clip 6 clamps thermocouple wire,
Quartz ampoule is limited；Meanwhile a pair of of thermocouple 4, connection TC2 thermometrics channel, in Gleeble- are welded again in 1 bottom end of sample
The enterprising trip temperature of 1500D hot modeling test machines measures, and sample holder solves the problems, such as hanging balancing, ensure simultaneously between pressure head 7
Electrified regulation；First, it is evacuated to 13.3Pa, with 1 to 1200 DEG C of 20 DEG C/s heating samples, is then heated to 1300 with 5 DEG C/s
DEG C, 60 seconds are kept the temperature, 1200 DEG C is cooled to 10 DEG C/s, stops heating, reads experimental data, comparison is measured using winding processing
The temperature TC2 that temperature TC1 and normal weld thermocouple 4 measure winds the survey of processing as shown in figure 3, TC1 is completely superposed with TC2
It is warm accurate and reliable.
The 1 Chemical composition of of chemical composition (WB) Table of 1 Q235B steel curved beams of table
Q235B slab
| 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 (6)
1. a kind of method that thermocouple wire is configured at sample, which is characterized in that include the following steps：
1) one end of a pair of of positive and negative anodes thermocouple wire is connected together with spot welding machine；
2) the positive and negative anodes thermocouple wire after welding is radially wound around sample, the welding of the positive and negative anodes thermocouple wire after welding
Point is located substantially at the radial bottom end of sample；
3) on the substantially top of sample radial direction, two thermocouple wires pass through a diplopore quartz ampoule, the diplopore quartz ampoule to pass through
It squeezes so that positive and negative anodes thermocouple wire is well contacted with specimen surface；
4) it after positive and negative anodes thermocouple wire passes through the diplopore quartz ampoule, is connected on thermocouple connecting pole；Wherein, positive and negative anodes thermocouple
After silk passes through the diplopore quartz ampoule, first enclosed around plastic ties one, then be connected on thermocouple connecting pole, meanwhile, plastic ties are to thermoelectricity
One pulling force of thermo wires；A crocodile clip is pressed from both sides on the thermocouple wire above the diplopore quartz ampoule, is used for the limit of diplopore quartz ampoule；
The positional distance sample and quartz ampoule contact point of the crocodile clip clamping thermocouple wireH is quartz ampoule
Height, D are specimen finish, and ε (%) is sample compression deformation, ε=0 when only heating indeformable；
5) sample is heated.
2. the method according to claim 1 that thermocouple wire is configured at sample, which is characterized in that sample holder is in hot-die
Between the collet of quasi- machine, make sample hanging balancing.
3. the method according to claim 1 that thermocouple wire is configured at sample, which is characterized in that the sample is cylinder
Body is compressed axially sample, and specimen size meetsH is that sample is high, and D is specimen finish；Sample is selected as Φ 8
×15mm。
4. the method according to claim 1 that thermocouple wire is configured at sample, which is characterized in that in the step 2),
Positive and negative anodes thermocouple wire winds the radial semi-perimeter of sample respectively；And wound section thermocouple wire is exposed, exposed length is at least
The half of perimeter.
5. the method according to claim 1 that thermocouple wire is configured at sample, which is characterized in that the diplopore quartz ampoule
Aperture be 0.5~1mm, a height of 10~15mm of quartz ampoule.
6. the method according to claim 1 that thermocouple wire is configured at sample, which is characterized in that in the step 5),
Sample heating carries out in a vacuum or 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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| CN105651618A CN105651618A (en) | 2016-06-08 |
| CN105651618B true CN105651618B (en) | 2018-09-18 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| 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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| CN105651618A (en) | 2016-06-08 |
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