CN117073600A - Measurement calibration method based on mechanical creep testing machine elongation system - Google Patents

Measurement calibration method based on mechanical creep testing machine elongation system Download PDF

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Publication number
CN117073600A
CN117073600A CN202311055460.XA CN202311055460A CN117073600A CN 117073600 A CN117073600 A CN 117073600A CN 202311055460 A CN202311055460 A CN 202311055460A CN 117073600 A CN117073600 A CN 117073600A
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CN
China
Prior art keywords
elongation
extraction rod
testing machine
grating ruler
mechanical creep
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202311055460.XA
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Chinese (zh)
Inventor
张高翔
龙安平
李怀骞
刘嘉彬
何柏锋
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shenzhen Wedge Zhongnan Research Institute Co ltd
Original Assignee
Shenzhen Wedge Zhongnan Research Institute Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shenzhen Wedge Zhongnan Research Institute Co ltd filed Critical Shenzhen Wedge Zhongnan Research Institute Co ltd
Priority to CN202311055460.XA priority Critical patent/CN117073600A/en
Publication of CN117073600A publication Critical patent/CN117073600A/en
Pending legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
    • G01B21/02—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring length, width, or thickness
    • G01B21/04—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring length, width, or thickness by measuring coordinates of points
    • G01B21/042—Calibration or calibration artifacts
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B11/00—Measuring arrangements characterised by the use of optical techniques
    • G01B11/02—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
    • 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
    • G01N3/62—Manufacturing, calibrating, or repairing devices used in investigations covered by the preceding subgroups

Abstract

The application discloses a measurement and calibration method based on a mechanical creep testing machine extension system, which is applied to the mechanical creep testing machine, wherein the mechanical creep testing machine extension system comprises the following components: the method comprises the following steps of: the elongation device is arranged in the clamp, the elongation of the elongation device is regulated and recorded, so that the elongation of the elongation device is transmitted to the extraction rod and drives the position of the extraction rod to change, when the position of the extraction rod changes, the position change of the extraction rod is measured and recorded through the grating ruler, and whether the mechanical creep testing machine elongation system is calibrated or not is determined according to the numerical relation between the elongation and the position change. The application can determine whether the mechanical creep testing machine elongation system is calibrated or not, and ensure the precision of the creep test of the sample.

Description

Measurement calibration method based on mechanical creep testing machine elongation system
Technical Field
The application relates to the technical field of measurement and calibration, in particular to a measurement and calibration method based on an elongation system of a mechanical creep testing machine.
Background
Creep elongation refers to the phenomenon that the volume and shape of a sample material change due to rearrangement of an internal structure and interatomic displacement under long-time continuous load, and a mechanical creep testing machine has an important influence on creep testing of the sample.
At present, in the prior art, whether the calibration work before the measurement is completed for the elongation system of the mechanical creep testing machine is judged, mainly after the calibration is carried out for the grating ruler, whether the measurement precision of the grating ruler meets the measurement requirement is judged, however, the grating ruler is only one part of the elongation system of the mechanical creep testing machine, and the completion of the calibration for the grating ruler cannot be used for indicating that the calibration is completed for the creep elongation system of the testing machine, so that the precision of the creep elongation test of a subsequent sample cannot be guaranteed.
Therefore, providing a measurement calibration method capable of ensuring the accuracy of the creep elongation test of a sample has become a technical problem to be solved by those skilled in the art.
Disclosure of Invention
The application aims to solve the problems and provides a measurement calibration method based on a mechanical creep testing machine elongation system. The specific technical scheme is as follows:
in a first aspect, the present application provides a measurement calibration method based on an elongation system of a mechanical creep testing machine, the method being applied to a mechanical creep testing machine comprising: the device comprises a clamp, a leading-out rod, a grating ruler and an elongation device, wherein the method comprises the following steps:
mounting the elongation device in the fixture;
adjusting and recording the elongation of the elongation device so that the elongation of the elongation device is transmitted to the extraction rod and the position of the extraction rod is driven to change;
when the position of the extraction rod changes, measuring and recording the position change quantity of the extraction rod through the grating ruler;
and determining whether the elongation system is calibrated according to the numerical relation between the elongation and the position change.
Preferably, the clamp comprises an upper clamp and a lower clamp, the mounting the elongation device in the clamp comprising:
the extension device is arranged between the upper clamp and the lower clamp through a threaded rod at the upper end and a threaded rod at the lower end of the extension device.
Preferably, a V-shaped groove is formed in the circumferential direction of the extension device, and the extraction rod is connected with the extension device through the V-shaped groove.
Preferably, before adjusting and recording the elongation of the elongation device, the method further comprises:
and zeroing the gap of the elongation device and resetting the numerical value of the grating ruler.
Preferably, said adjusting and recording the elongation of said elongation means comprises:
adjusting the width of the gap of the extension device through a knob of the extension device;
the width is read by the scale graduation of the elongation device to record the elongation of the elongation device.
Preferably, the extraction rod comprises an extraction rod arranged on the left side of the extension device and an extraction rod arranged on the right side of the extension device, and the grating ruler comprises a left grating ruler connected with the extraction rod on the left side and a right grating ruler connected with the extraction rod on the right side.
Preferably, the measuring and recording the position change of the extraction rod by the grating ruler when the position of the extraction rod changes includes:
when the position of the extraction rod changes, measuring and recording a first position change amount of the extraction rod at the left side through the left grating ruler;
measuring and recording the second position variation of the right extraction rod through the right grating ruler;
and taking the average value of the first position variation and the second position variation as the position variation of the extraction rod.
Preferably, the determining whether the elongation system is calibrated according to the numerical relation between the elongation and the position change comprises:
calculating an absolute value of a difference between the elongation and the position change amount;
when the absolute value is smaller than a preset threshold value, determining that the elongation system is calibrated;
and when the absolute value is greater than or equal to a preset threshold value, determining that the elongation system is not calibrated.
Preferably, the method further comprises:
if the extension system is determined to be calibrated, the extension device is taken down;
and installing a sample to be measured in the clamp, and measuring the sample to be measured.
Compared with the prior art, the technical scheme provided by the application has the following advantages:
the elongation of the elongation device is regulated and recorded by installing the elongation device in the clamp, the elongation of the elongation device is regulated, the elongation of the elongation device is transmitted to the extraction rod and drives the position of the extraction rod to change, and the elastic piece of the grating ruler is deformed when the position of the extraction rod changes, so that the position change of the extraction rod can be measured through the grating ruler and recorded, and whether the elongation system of the mechanical creep testing machine is calibrated or not can be determined according to the numerical relation between the elongation of the elongation device and the position change of the extraction rod, and the precision of the creep test of a sample is ensured.
Drawings
In order to more clearly illustrate the embodiments of the application or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, and it will be obvious to a person skilled in the art that other drawings can be obtained from these drawings without inventive effort.
FIG. 1 is a schematic flow chart of a measurement calibration method based on an elongation system of a mechanical creep testing machine according to an embodiment of the present application;
FIG. 2 is a schematic plan view of an elongation system of a mechanical creep testing machine according to an embodiment of the present application;
FIG. 3 is a schematic perspective view of an elongation system of a mechanical creep testing machine according to an embodiment of the present application;
FIG. 4 is a schematic diagram of a grating ruler according to an embodiment of the present application;
FIG. 5 is a schematic view of an elongation device according to an embodiment of the present application;
fig. 6 is a schematic perspective view of an upper extraction rod according to an embodiment of the present application;
fig. 7 is a schematic perspective view of a lower extraction rod according to an embodiment of the present application;
reference numerals illustrate:
the device comprises an upper clamp 1, an upper extraction rod 2, an extension device 3, a lower extraction rod 4, a grating ruler 5, a lower clamp 6, an upper V-shaped groove 30, scale scales 31, a knob 32, a limit ring 33 corresponding to an upper threaded rod, an upper threaded rod 34, a rotating piece 35, a gap 36, a lower V-shaped groove 37, a lower limit ring 38 corresponding to a lower threaded rod, a lower threaded rod 39 and an elastic piece 50.
Detailed Description
In order that those skilled in the art will better understand the present application, a technical solution in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present application without making any inventive effort, shall fall within the scope of the present application.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present application and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate in order to describe the embodiments of the application herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
In the present application, the terms "upper", "lower", "inner", "middle", "outer", "front", "rear", and the like indicate an azimuth or a positional relationship based on that shown in the drawings. These terms are only used to better describe the present application and its embodiments and are not intended to limit the scope of the indicated devices, elements or components to the particular orientations or to configure and operate in the particular orientations.
Also, some of the terms described above may be used to indicate other meanings in addition to orientation or positional relationships, for example, the term "upper" may also be used to indicate some sort of attachment or connection in some cases. The specific meaning of these terms in the present application will be understood by those of ordinary skill in the art according to the specific circumstances.
Furthermore, the terms "disposed," "connected," "secured" and "affixed" are to be construed broadly. For example, "connected" may be in a fixed connection, a removable connection, or a unitary construction; may be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements, or components. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.
It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be combined with each other.
As shown in fig. 1, embodiment 1 of the present application provides a measurement calibration method based on an elongation system of a mechanical creep testing machine, which is applied to the mechanical creep testing machine, the elongation system of the mechanical creep testing machine includes: the device comprises a clamp, a leading-out rod, a grating ruler and an elongation device, wherein the method comprises the following steps:
step S10: mounting the elongation device in the fixture;
step S20: adjusting and recording the elongation of the elongation device so that the elongation of the elongation device is transmitted to the extraction rod and the position of the extraction rod is driven to change;
step S30: when the position of the extraction rod changes, measuring and recording the position change quantity of the extraction rod through the grating ruler;
step S40: and determining whether the elongation system is calibrated according to the numerical relation between the elongation and the position change.
In this embodiment, the fixture of the elongation system is used for fixing the elongation device, and the extraction rod is used for transmitting the elongation of the elongation device to the extraction rod when the elongation of the elongation device changes, so as to drive the position of the extraction rod to change. For example, the circumference of the extension device may be provided with a groove, and the extraction rod is matched with the extension device through the groove, so that when the extension amount of the extension device changes, the extraction rod moves along with the extension of the extension device, and the position of the extraction rod changes.
The grating ruler is a high-precision measuring instrument, the basic principle is to measure by utilizing the interference principle of light, the grating ruler consists of a light source, a grating and a photoelectric detector, and the grating consists of a series of mutually parallel stripes. Interference fringes are formed when light passes through the grating, and the photoelectric detector detects the fringes and converts the fringes into electric signals, so that the position and the motion state of an object can be obtained through analyzing the electric signals. Because the extraction rod is connected with the elastic piece (such as a spring) of the grating ruler, when the extraction rod changes in position, the elastic piece of the grating ruler can deform, the distance between grating lines can change, diffraction and interference phenomena occur when light passes through the grating, and the grating ruler can measure the change (such as displacement) of the position change of the extraction rod, so that the elongation of the elongation device can be indirectly measured.
The elongation device can be a measuring instrument with an elongation function, the mechanical principle of the elongation device is consistent with that of a spiral micrometer, and the elongation of the elongation device can be recorded by adjusting the width of a gap at the middle position of the elongation device.
Before measuring a sample using an elongation system of a mechanical creep testing machine, it is necessary to determine whether the elongation system has completed calibration, specifically, whether the elongation system has completed calibration, and to install an elongation device in a jig so as to fix the elongation device, in order to ensure the accuracy of the creep test of the sample, it is understood that the elongation device is calibrated before being installed to the jig. The method comprises the steps of fixing an elongation device, then adjusting the elongation of the elongation device, recording the adjusted elongation of the elongation device, transmitting the elongation of the elongation device to a drawing rod after the elongation of the elongation device is adjusted, driving the drawing rod to change in position, measuring the change in position of the drawing rod through a grating ruler and recording the change due to the fact that an elastic piece of the grating ruler is deformed when the position of the drawing rod changes, for example, adjusting the elongation of the elongation device to 0.5mm, recording the change in position of the drawing rod measured by the grating ruler at the moment as one set of data, adjusting the elongation to 1mm, recording the change in position of the drawing rod measured by the grating ruler at the moment as one set of data, and the like, so that multiple sets of data can be recorded.
And determining whether the mechanical creep testing machine elongation system is calibrated according to the numerical relation between the recorded elongation of the elongation device and the position change of the extraction rod. Wherein determining whether the elongation system is calibrated according to the numerical relationship between the elongation and the position change comprises:
calculating an absolute value of a difference between the elongation and the position change amount;
when the absolute value is smaller than a preset threshold value, determining that the elongation system is calibrated;
and when the absolute value is greater than or equal to a preset threshold value, determining that the elongation system is not calibrated.
The absolute value of the difference between the elongation of the elongation device and the position change of the extraction rod in each set of data is calculated, and the smaller the absolute value of the difference between the elongation and the position change is, the higher the calibration accuracy of the elongation system of the mechanical creep testing machine is, so that when the absolute value is smaller than a preset threshold value, the calibration of the elongation system of the mechanical creep testing machine can be determined, for example, 10 sets of data are recorded, and when the absolute value of 8 sets of data is smaller than the preset threshold value, the calibration of the elongation system of the mechanical creep testing machine is determined. When the absolute value of the 3 sets of data is greater than or equal to a preset threshold, it may be determined that the elongation system is not calibrated. It should be noted that the setting of how many sets of data and the preset threshold value are recorded may be set according to the actual measurement requirement, which is not limited herein.
In one embodiment, the method further comprises:
if the extension system is determined to be calibrated, the extension device is taken down;
and installing a sample to be measured in the clamp, and measuring the sample to be measured.
If the extension system of the mechanical creep testing machine is determined to be calibrated, the measurement accuracy of the extension system of the mechanical creep testing machine is proved to meet the test requirement, the sample to be tested can be tested, the extension device is taken down, the sample to be tested is installed in the clamp, the sample to be tested is measured, and therefore the accuracy of the sample measurement can be improved.
Fig. 2 is a schematic plan view of an elongation system of a mechanical creep testing machine provided by an embodiment of the present application, fig. 3 is a schematic perspective view of an elongation system of a mechanical creep testing machine provided by an embodiment of the present application, fig. 4 is a schematic plan view of an elongation system of a mechanical creep testing machine provided by an embodiment of the present application, an elongation of an elongation device 3 is transmitted to an upper extraction rod 2 and a lower extraction rod 4 when a position of an elastic member 50 is stressed, a clamp of the elongation system includes an upper clamp 1 and a lower clamp 6, the extraction rod includes an upper extraction rod 2 and a lower extraction rod 4, the upper extraction rod 2 and the lower extraction rod 4 are both connected with an elongation device 3, the lower extraction rod 4 can be used for fixing the grating scale 5 and keeping the elastic member 50 of the grating scale 5 vertically upwards, a bottom of the upper extraction rod 4 is in contact with a top of the elastic member 50 of the grating scale 5, and keeps a compression state of the elastic member 50 within a range, and after the elongation of the elongation device 3 is adjusted, since the leveling state of the testing machine should be performed, the upper extraction rod 2 is kept unchanged, the lower extraction rod 4 moves downwards, when the lower extraction rod 4 moves downwards, the lower extraction rod 4 moves, and when the lower extraction rod 4 moves downwards, the grating 5 moves downwards, and the lower extraction rod 4 is pulled down, and the elastic member 5 is pulled to rebound, and the elongation is kept at the top.
As shown in fig. 5, the structure of the elongation device according to the embodiment of the present application is schematically shown, and the elongation device 3 includes a threaded rod 34 at the upper end, a threaded rod 39 at the lower end, a stop ring 33 corresponding to the threaded rod at the upper end, a stop ring 38 corresponding to the threaded rod at the lower end, a V-shaped groove 30 at the upper end, a V-shaped groove 37 at the lower end, a scale mark 31, a knob 32, a rotating member 35, and a gap 36, wherein the rotating member 35 can be rotated by rotating the knob 32, so that the size of the gap 36 can be adjusted, and the elongation of the elongation device 3 can be changed.
Wherein said mounting of said elongation means 3 in said clamp comprises:
the extension device 3 is mounted between the upper clamp 1 and the lower clamp 6 by means of a threaded rod 34 at the upper end and a threaded rod 39 at the lower end of the extension device 3. For example, the threaded rod 34 at the upper end cooperates with the internal thread of the upper clamp 1 and the threaded rod 39 at the lower end cooperates with the internal thread of the lower clamp 6, so that the elongation device 3 is fixed in the elongation system of the mechanical creep-testing machine.
In one embodiment, the upper V-shaped groove 30 and the lower V-shaped groove 37 are circumferentially open, and the draw bar is connected to the extension device by the V-shaped groove. Specifically, the upper extraction rod 2 is connected to the elongation device 3 through the V-shaped groove 30 at the upper end, and the lower extraction rod 4 is connected to the elongation device 3 through the V-shaped groove 37 at the lower end. So that the elongation of the elongation means 3 can be transferred to the upper extraction rod 2 and the lower extraction rod 4 after the elongation of the elongation means 3 is adjusted. Fig. 6 is a schematic perspective view of an upper extraction rod according to an embodiment of the present application, and fig. 7 is a schematic perspective view of a lower extraction rod according to an embodiment of the present application.
In one embodiment, prior to adjusting and recording the elongation of the elongation device, the method further comprises:
and zeroing the gap of the elongation device and resetting the numerical value of the grating ruler.
Before the elongation of the elongation device 3 is adjusted and recorded, the gap 36 of the elongation device 3 is set to zero (i.e. the reading of the scale 31 is 0), and the value of the grating scale 5 is cleared. By zeroing the elongation device 3 and the grating ruler 5, the elongation amount of the elongation device 3 and the position change amount of the draw bar can be recorded more conveniently.
In one embodiment, said adjusting and recording the elongation of said elongation device comprises:
adjusting the width of the gap of the extension device through a knob of the extension device;
the width is read by the scale graduation of the elongation device to record the elongation of the elongation device.
By rotating the knob 32 of the extension means 3, the width of the gap 36 of the extension means 3 can be adjusted, the width indicating the extension of the extension means, and by reading the width by means of the scale 31 of the extension means 3, the extension of the extension means 3 can be determined, whereby the extension of the extension means 3 is recorded.
Further, the extraction rod comprises an extraction rod arranged on the left side of the extension device and an extraction rod arranged on the right side of the extension device, and the grating ruler comprises a left grating ruler connected with the extraction rod on the left side and a right grating ruler connected with the extraction rod on the right side.
The left side and the right side of the extension device are provided with extraction rods oppositely, the extraction rods on the left side and the extraction rods on the right side are respectively provided with an upper extraction rod and a lower extraction rod, and the grating ruler comprises a left grating ruler connected with the lower extraction rod on the left side and a right grating ruler connected with the lower extraction rod on the right side, namely the grating ruler is arranged oppositely on the left side and the right side. The position change quantity of the extraction rod can be more accurately represented by setting the grating scales on the left side and the right side to record the position change quantity of the extraction rod.
Further, when the position of the extraction rod is changed, measuring and recording the change amount of the position of the extraction rod by the grating ruler comprises:
when the position of the extraction rod changes, measuring and recording a first position change amount of the extraction rod at the left side through the left grating ruler;
measuring and recording the second position variation of the right extraction rod through the right grating ruler;
and taking the average value of the first position variation and the second position variation as the position variation of the extraction rod.
When the position of the extraction rod changes, the position change amount (marked as a first position change amount) of the extraction rod on the left side is measured and recorded through the left grating ruler, the position change amount (marked as a second position change amount) of the extraction rod on the right side is measured and recorded through the right grating ruler, and the average value of the first position change amount and the second position change amount is calculated and used as the position change amount of the extraction rod. The amount of change in the position of the draw bar can be more accurately characterized.
It is to be understood that the terminology used herein is for the purpose of describing particular example embodiments only, and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises," "comprising," "includes," "including," and "having" are inclusive and therefore specify the presence of stated features, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and/or groups thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order described or illustrated, unless an order of performance is explicitly stated. It should also be appreciated that additional or alternative steps may be used.
The foregoing is only a specific embodiment of the application to enable those skilled in the art to understand or practice the application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
The principles and embodiments of the present application have been described herein with reference to specific examples, the description of which is intended only to facilitate an understanding of the method of the present application and its core ideas. The foregoing is merely illustrative of the preferred embodiments of this application, and it is noted that there is objectively no limit to the specific structure disclosed herein, since numerous modifications, adaptations and variations can be made by those skilled in the art without departing from the principles of the application, and the above-described features can be combined in any suitable manner; such modifications, variations and combinations, or the direct application of the inventive concepts and aspects to other applications without modification, are contemplated as falling within the scope of the present application.

Claims (9)

1. A method for measuring and calibrating an elongation system based on a mechanical creep testing machine, the method being applied to a mechanical creep testing machine, the elongation system comprising: the device comprises a clamp, a leading-out rod, a grating ruler and an elongation device, wherein the method comprises the following steps:
mounting the elongation device in the fixture;
adjusting and recording the elongation of the elongation device so that the elongation of the elongation device is transmitted to the extraction rod and the position of the extraction rod is driven to change;
when the position of the extraction rod changes, measuring and recording the position change quantity of the extraction rod through the grating ruler;
and determining whether the elongation system is calibrated according to the numerical relation between the elongation and the position change.
2. The method of measurement calibration based on a mechanical creep-testing machine elongation system according to claim 1, wherein the clamps comprise an upper clamp and a lower clamp, the mounting the elongation device in the clamps comprising:
the extension device is arranged between the upper clamp and the lower clamp through a threaded rod at the upper end and a threaded rod at the lower end of the extension device.
3. The measurement and calibration method based on the elongation system of the mechanical creep testing machine according to claim 1, wherein a V-shaped groove is formed in the circumferential direction of the elongation device, and the extraction rod is connected with the elongation device through the V-shaped groove.
4. The method of measurement calibration based on a mechanical creep-testing machine elongation system according to claim 1, wherein before adjusting and recording the elongation of the elongation device, the method further comprises:
and zeroing the gap of the elongation device and resetting the numerical value of the grating ruler.
5. The method of calibrating a measurement of an elongation system of a mechanical creep-testing machine according to claim 1, wherein said adjusting and recording the elongation of the elongation device comprises:
adjusting the width of the gap of the extension device through a knob of the extension device;
the width is read by the scale graduation of the elongation device to record the elongation of the elongation device.
6. The measurement and calibration method based on the elongation system of the mechanical creep testing machine according to claim 1, wherein the extraction rod comprises an extraction rod arranged on the left side and an extraction rod arranged on the right side of the elongation device, and the grating ruler comprises a left grating ruler connected with the extraction rod on the left side and a right grating ruler connected with the extraction rod on the right side.
7. The method for calibrating a mechanical creep testing machine elongation system according to claim 6, wherein the measuring and recording the position change of the extraction rod by the grating ruler when the position of the extraction rod is changed comprises:
when the position of the extraction rod changes, measuring and recording a first position change amount of the extraction rod at the left side through the left grating ruler;
measuring and recording the second position variation of the right extraction rod through the right grating ruler;
and taking the average value of the first position variation and the second position variation as the position variation of the extraction rod.
8. The method for calibrating a measurement of an elongation system of a mechanical creep testing machine according to claim 1, wherein the determining whether the elongation system is calibrated based on a numerical relationship between the elongation and the position change amount comprises:
calculating an absolute value of a difference between the elongation and the position change amount;
when the absolute value is smaller than a preset threshold value, determining that the elongation system is calibrated;
and when the absolute value is greater than or equal to a preset threshold value, determining that the elongation system is not calibrated.
9. The method of measurement calibration based on a mechanical creep-testing machine elongation system of claim 1, further comprising:
if the extension system is determined to be calibrated, the extension device is taken down;
and installing a sample to be measured in the clamp, and measuring the sample to be measured.
CN202311055460.XA 2023-08-21 2023-08-21 Measurement calibration method based on mechanical creep testing machine elongation system Pending CN117073600A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202311055460.XA CN117073600A (en) 2023-08-21 2023-08-21 Measurement calibration method based on mechanical creep testing machine elongation system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202311055460.XA CN117073600A (en) 2023-08-21 2023-08-21 Measurement calibration method based on mechanical creep testing machine elongation system

Publications (1)

Publication Number Publication Date
CN117073600A true CN117073600A (en) 2023-11-17

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Application Number Title Priority Date Filing Date
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