CN217156370U - Device for measuring metal thermal expansion coefficient - Google Patents
Device for measuring metal thermal expansion coefficient Download PDFInfo
- Publication number
- CN217156370U CN217156370U CN202221031372.7U CN202221031372U CN217156370U CN 217156370 U CN217156370 U CN 217156370U CN 202221031372 U CN202221031372 U CN 202221031372U CN 217156370 U CN217156370 U CN 217156370U
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- slit
- thermal expansion
- measuring
- coefficient
- metal
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- 239000002184 metal Substances 0.000 title claims abstract description 52
- 238000012360 testing method Methods 0.000 claims abstract description 31
- 239000004065 semiconductor Substances 0.000 claims abstract description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 20
- 230000003287 optical effect Effects 0.000 claims description 8
- 230000007246 mechanism Effects 0.000 claims description 6
- 230000005611 electricity Effects 0.000 abstract description 3
- 230000008520 organization Effects 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 6
- 238000010438 heat treatment Methods 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The utility model discloses a measure device of metal thermal expansion coefficient, including the kerve frame plate, the direction spout has been seted up in the kerve frame plate, be equipped with the optics guide rail in the direction spout, be equipped with semiconductor laser, beam expanding lens pipe, supplementary laser accredited testing organization, CCD measuring apparatu and light intensity measuring device on the axial of optics guide rail to and the oscilloscope of being connected with CCD measuring apparatu electricity. The utility model discloses this small deformation volume of metal coefficient of thermal expansion has been fitted to the accuracy.
Description
Technical Field
The utility model relates to the technical field of, specifically be a measure metal thermal expansion coefficient's device.
Background
The metal material with large thermal expansion coefficient has more size increase after being heated, and after being made into a workpiece, such as a common mechanical part (component) working at normal temperature, the thermal expansion property can be not considered, but in some special occasions, the influence of the common mechanical part (component) needs to be fully considered. For example, long parts (structures) working in places with large temperature difference, such as train rails, are provided with expansion joints; the thermal expansion coefficient of key parts of a precision instrument and the like is as small as possible in consideration of deformation caused by temperature change; some mechanical parts with larger interference in engineering can be assembled or disassembled by utilizing the thermal expansion of materials.
The method for measuring the thermal expansion coefficient comprises a differential method and a push rod method, wherein the differential method is characterized in that a sample, a pressure rod and a support rod are coaxially and vertically placed in a heating furnace through a thermal expansion instrument, a load of 0.01MPa is applied to the sample in the central axis direction, a cylindrical sample is heated at a certain speed, the temperature and the height change of the sample are continuously recorded, and the linear expansion coefficient generated by the sample is calculated through the relative length change of an inner differential tube and an outer differential tube during temperature rise.
The push rod method is that a sample is put into a thermal expansion instrument, one end of the sample is fixed, the sample is heated to a specified test temperature at a certain heating rate, and the linear expansion rate of the sample is obtained by testing the length variation of the sample in the process from the initial temperature to the test temperature;
however, the above experimental method has relatively low measurement accuracy for the metal thermal expansion coefficient, and therefore, a device for measuring the metal thermal expansion coefficient is provided.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a measure metal thermal expansion coefficient's device to solve the problem that proposes among the above-mentioned background art.
In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a measure device of metal thermal expansion coefficient, includes the kerve frame plate, the guide chute has been seted up in the kerve frame plate, be equipped with the optics guide rail in the guide chute, be equipped with semiconductor laser, beam expanding lens pipe, supplementary laser accredited testing organization, CCD measuring apparatu and light intensity measuring device on the axial of optics guide rail to and the oscilloscope of being connected with the CCD measuring apparatu electricity.
Preferably, the auxiliary laser testing mechanism comprises a guide rail sliding block, an adjusting push block, a testing frame, a metal pipe clamp holder, a metal pipe, a water inlet, a water outlet and a thermocouple mounting seat small hole, the adjusting push block is arranged on the guide rail sliding block, the testing frame is arranged on the adjusting push block, the metal pipe is arranged in the testing frame, the metal pipe clamp holder is arranged at one end of the metal pipe, and a slit device is arranged at the other end of the metal pipe.
Preferably, the adjusting push block can slide on the guide rail sliding block.
Preferably, the metal pipe is provided with a water inlet, a water outlet and thermocouple mounting seat small holes.
Preferably, the slit device still includes slit device stiff end, slit device removal end, fixed screw, slit lock, locating pin and slit, wear to be equipped with two fixed screws in the slit device stiff end, the slit device stiff end passes through fixed screw to be fixed on the test jig.
Preferably, a slit is arranged between the fixed end of the slit device and the movable end of the slit device.
Preferably, one end of the fixed end of the slit device is provided with a slit lock.
Compared with the prior art, the beneficial effects of the utility model are as follows:
the utility model discloses this small deformation volume of metal coefficient of thermal expansion has been fitted to the accuracy.
Drawings
FIG. 1 is a schematic view of the structure of the present invention;
fig. 2 is a schematic structural view of the auxiliary laser testing mechanism of the present invention;
fig. 3 is a schematic structural diagram of the slit device of the present invention;
fig. 4 is a schematic view of the connection structure of the water bath kettle of the present invention.
In the figure: 1. a bottom slot frame plate; 2. a guide chute; 3. an optical guide; 4. a semiconductor laser; 5. a beam expander tube; 6. an auxiliary laser testing mechanism; 601. a guide rail slider; 602. adjusting the push block; 603. a test jig; 604. a metal tube holder; 605. a metal tube; 606. a water inlet; 607. a water outlet; 608. a slit device fixing end; 609. a slit device moving end; 610. fixing screws; 611. a slit lock; 612. positioning pins; 613. a thermocouple mounting seat small hole; 614. a slit.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Embodiment 1
As shown in the attached figure 1, the utility model provides a technical scheme: the utility model provides a measure device of metal thermal expansion coefficient, includes end slot frame plate 1, has seted up guide chute 2 in the end slot frame plate 1, is equipped with optical guide rail 3 in the guide chute 2, is equipped with semiconductor laser 4, beam expanding mirror tube 5, supplementary laser accredited testing organization 6, CCD measuring apparatu 7 and light intensity measuring device 8 on optical guide rail 3's the axial to and the oscilloscope 9 of being connected with CCD measuring apparatu 7 electricity.
Example two
The scheme in the first embodiment is further described in the following with reference to specific working modes, which are described in detail in the following:
as shown in fig. 1, 2 and 3, as a preferred embodiment, based on the above-mentioned manner, the auxiliary laser testing mechanism 6 further includes a guide rail sliding block 601, an adjusting push block 602, a testing jig 603, a metal pipe holder 604, a metal pipe 605, a water inlet 606, a water outlet 607 and a thermocouple mounting seat small hole 613, the guide rail sliding block 601 is provided with the adjusting push block 602, the adjusting push block 602 is provided with the testing jig 603, the testing jig 603 is provided with the metal pipe 605 therein, one end of the metal pipe 605 is provided with the metal pipe holder 604, the other end is provided with a slit device, the adjusting push block 602 can slide on the guide rail sliding block 601, the metal pipe 605 is provided with the water inlet 606, the water outlet 607 and the thermocouple mounting seat small hole 613, the slit device further includes a slit device fixing end 608, a slit device moving end 609, a fixing screw 610, a slit lock 611, a positioning pin 612 and a slit 614, two fixing screws 610 are inserted in the slit device fixing end 608, the fixed end 608 of the slit device is fixed on the test frame 603 through a fixing screw 610, a slit 614 is arranged between the fixed end 608 of the slit device and the movable end 609 of the slit device, one end of the fixed end 608 of the slit device is provided with a slit lock 611, the slit device is pulled up, the metal pipe 605 is kept to be vertically arranged on the test frame 603, the position of the metal pipe 605 is limited through the metal pipe clamp 604, the water inlet 606 is kept to be below, the water outlet 607 is kept to be above, the height of the slit device is reduced, the upper end of the metal pipe 605 is sleeved into a small hole at the bottom end of the slit device, the slit device is slightly pressed downwards, the metal pipe 605 is in close contact with the slit device, the fixing screw 610 is locked, and the adjusting push block 602 is adjusted to enable the slit to be close to the vertical line of the guide rail sliding block 601.
The working principle of the device for measuring the thermal expansion coefficient of metal is as follows: firstly, pulling up the slit device, keeping the metal pipe 605 vertically standing on the test rack 603, limiting the position of the metal pipe 605 by the metal pipe clamp 604, keeping the water inlet 606 at the lower part, keeping the water outlet 607 at the upper part, reducing the height of the slit device, sleeving the upper end of the metal pipe 605 into a small hole at the bottom end of the slit device, slightly pressing the slit device downwards to enable the metal pipe 605 to be in close contact with the slit device, locking the fixing screw 610, and adjusting the adjusting push block 602 to enable the slit to be close to the vertical line of the guide rail sliding block 601;
then, placing the test jig 603 and the semiconductor laser 4 on the optical guide rail 3, starting the semiconductor laser 4, enabling the slit and the light source to be high together and coaxial with the optical guide rail 3, placing the CCD device between the semiconductor laser 4 and the test jig 603, ensuring that the light beam is emitted to the middle of the CCD measuring instrument 7, connecting the CCD measuring instrument 7 with the oscilloscope 9, carrying out calibration on the oscilloscope 9, placing the CCD measuring instrument 7 on the right side of the test jig 603 after the calibration is finished, sequentially installing the semiconductor laser 4, the beam expanding lens tube 5, the CCD measuring instrument 7, the light intensity measuring device 8 and the oscilloscope 9 on the optical guide rail 3 according to the mode of fig. 1, keeping a larger distance between the slit on the test jig 603 and the CCD measuring instrument 7, measuring the distance D between the slit and the CCD measuring instrument 7 for multiple times after the installation is finished, and calculating an average value;
then, coating heat-conducting silicone grease on the thermocouple, inserting the thermocouple into the thermocouple mounting seat small hole 613, opening a thermocouple sensor switch, then loosening the slit lock 611, turning on a water pump switch as shown in FIG. 4, and setting the heating temperature of the temperature controller, wherein the heating temperature value is set every 5 degrees between 25 and 90 degrees;
then, after the temperature is stabilized each time, reading out the number of grids corresponding to the mth wave peak on the left side and the nth wave peak on the right side of the image center of the oscilloscope 9, wherein d is equal to the actual space distance corresponding to each grid of the actual grid number xAnd (the actual grid number is the grid number corresponding to 1 frame in the image and is the grid number corresponding to the left mth peak and the right nth peak), the distance d between the mth and nth-level bright stripes can be calculated. Selecting different wave crests for multiple times, calculating the average value of the distance d, reading the thermoelectric potential value, searching the thermocouple graduation table to obtain the temperature value, and obtaining the front-back temperature difference
；
Finally, data processing is carried out according to a formula
And obtaining the metal expansion coefficient alpha.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. A device for measuring the coefficient of thermal expansion of a metal, comprising a bottom groove frame plate (1), characterized in that: the device is characterized in that a guide sliding groove (2) is formed in the bottom groove frame plate (1), an optical guide rail (3) is arranged in the guide sliding groove (2), and a semiconductor laser (4), a beam expander tube (5), an auxiliary laser testing mechanism (6), a CCD measuring instrument (7) and a light intensity measuring device (8) are arranged in the axial direction of the optical guide rail (3) and an oscilloscope (9) electrically connected with the CCD measuring instrument (7) is arranged.
2. The apparatus for measuring the coefficient of thermal expansion of a metal according to claim 1, wherein: the auxiliary laser testing mechanism (6) comprises a guide rail sliding block (601), an adjusting push block (602), a testing frame (603), a metal pipe holder (604), a metal pipe (605), a water inlet (606), a water outlet (607) and a thermocouple mounting seat small hole (613), the adjusting push block (602) is arranged on the guide rail sliding block (601), the testing frame (603) is arranged on the adjusting push block (602), the metal pipe (605) is arranged in the testing frame (603), the metal pipe holder (604) is arranged at one end of the metal pipe (605), and a slit device is arranged at the other end of the metal pipe (605).
3. The apparatus for measuring the coefficient of thermal expansion of a metal according to claim 2, wherein: the adjusting push block (602) can slide on the guide rail sliding block (601).
4. The apparatus for measuring the coefficient of thermal expansion of a metal according to claim 2, wherein: the metal pipe (605) is provided with a water inlet (606), a water outlet (607) and a thermocouple mounting seat small hole (613).
5. The apparatus for measuring the coefficient of thermal expansion of a metal according to claim 2, wherein: the slit device further comprises a slit device fixing end (608), a slit device moving end (609), a fixing screw (610), a slit lock (611), a positioning pin (612) and a slit (614), two fixing screws (610) penetrate through the slit device fixing end (608), and the slit device fixing end (608) is fixed on the test frame (603) through the fixing screws (610).
6. The apparatus for measuring the coefficient of thermal expansion of a metal according to claim 5, wherein: a slit (614) is arranged between the slit device fixing end (608) and the slit device moving end (609).
7. The apparatus for measuring the coefficient of thermal expansion of a metal according to claim 5, wherein: one end of the fixed end (608) of the slit device is provided with a slit lock (611).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221031372.7U CN217156370U (en) | 2022-04-29 | 2022-04-29 | Device for measuring metal thermal expansion coefficient |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221031372.7U CN217156370U (en) | 2022-04-29 | 2022-04-29 | Device for measuring metal thermal expansion coefficient |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217156370U true CN217156370U (en) | 2022-08-09 |
Family
ID=82662925
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221031372.7U Expired - Fee Related CN217156370U (en) | 2022-04-29 | 2022-04-29 | Device for measuring metal thermal expansion coefficient |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217156370U (en) |
-
2022
- 2022-04-29 CN CN202221031372.7U patent/CN217156370U/en not_active Expired - Fee Related
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20220809 |
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| CF01 | Termination of patent right due to non-payment of annual fee |