CN109085038A - A kind of gauge length scaling method of metal stretching sample - Google Patents
A kind of gauge length scaling method of metal stretching sample Download PDFInfo
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- CN109085038A CN109085038A CN201811041279.2A CN201811041279A CN109085038A CN 109085038 A CN109085038 A CN 109085038A CN 201811041279 A CN201811041279 A CN 201811041279A CN 109085038 A CN109085038 A CN 109085038A
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- metal stretching
- gauge length
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/14—Measuring arrangements characterised by the use of mechanical techniques for measuring distance or clearance between spaced objects or spaced apertures
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Abstract
The invention discloses a kind of gauge length scaling methods of metal stretching sample, comprising steps of the first step, the metal stretching sample for needing to carry out tension test, measure its diameter；Second step tints to the overall surface of metal stretching sample；Third step, with the presupposition multiple of metal stretching specimen finish, as the original gauge length of metal stretching sample before the stretching, then laser marking machine is used, mark is carried out to the part that the length of metal stretching specimen surface is equal to original gauge length, calibration is corresponding with original gauge length, presets multiple graduation marks.A kind of gauge length scaling method of metal stretching sample disclosed by the invention, it will not cause to damage to the surface of metal stretching sample, the gauge length calibration to metal stretching sample can be realized, so that metal stretching sample carries out tension test in the intact state, guarantee the accuracy of tension test and the precision of measurement, be conducive to promote and apply, be of great practical significance.
Description
Technical field
The present invention relates to experimental technique fields, more particularly to a kind of gauge length scaling method of metal stretching sample.
Background technique
Tension test refers to the test method that material property is measured in the case where bearing axial tensile loads.Utilize tension test
Obtained data can determine the elastic limit of material, elongation, elasticity modulus, proportional limit, area reduction amount, stretch by force
Degree, yield point, yield strength and other tensile property indexs.
Currently, in metal tensile test, in order to metal stretching sample made of measuring metallic materials before the stretching after
Length variation, obtains its elongation, needs to pull the both ends of metal stretching sample by testing machine, to measure metal stretching examination
Sample before the stretching after length variation.Wherein, before the test, it needs to mark metal stretching sample (such as metal bar) in advance
Away from calibration, the length of the label be for measure metal stretching sample occur afterwards before the stretching length variation sample parts it is former
Beginning length.
In order to carry out the calibration of gauge length on metal stretching sample, common marking machine (such as groove is usually used at present
Machine), during the calibration process, the surface to metal stretching sample is needed, by way of delineation, in the length range internal standard of gauge length
Several fixed graduation marks (or punctuate), therefore, it will the surface of metal stretching sample is caused to damage, actually to metal
The structure of tensile sample produces influence, destroys the integrality of structure, to influence the accurate of the tension test finally carried out
The precision of property and measurement.
Therefore, at present there is an urgent need to develop a kind of method, the surface of metal stretching sample will not be caused to damage, i.e.,
It can be achieved to demarcate the gauge length of metal stretching sample, so that metal stretching sample carries out tension test in the intact state, guarantee
The accuracy of tension test and the precision of measurement.
Summary of the invention
In view of this, the object of the present invention is to provide a kind of gauge length scaling method of metal stretching sample, it will not be to gold
The surface for belonging to tensile sample causes to damage, and the gauge length calibration to metal stretching sample can be realized, so that metal stretching sample exists
Tension test is carried out under good working condition, guarantees the accuracy of tension test and the precision of measurement, is conducive to promote and apply, and there is weight
Big production practices meaning.
For this purpose, the present invention provides a kind of gauge length scaling methods of metal stretching sample, comprising the following steps:
The first step, the metal stretching sample for needing to carry out tension test, measure its diameter；
Second step tints to the overall surface of metal stretching sample；
Third step, with the presupposition multiple of metal stretching specimen finish, as the original mark of metal stretching sample before the stretching
Away from, laser marking machine is then used, the part progress mark to the length of metal stretching specimen surface equal to original gauge length, calibration
It is corresponding with original gauge length, preset multiple equally spaced graduation marks.
Wherein, in the first step, the diameter of metal stretching sample is measured using vernier caliper.
Wherein, in second step, using the oil pike of different colours, to be applied to the overall surface of metal stretching sample
Color.
Wherein, in the third step, the presupposition multiple is five times or ten times；
It is described it is corresponding with original gauge length preset multiple equally spaced graduation marks, specifically include five graduation marks or ten
A graduation mark.
It wherein, can also include a gauge length calibration steps after third step, specifically:
It is not the central region or and central region of metal stretching sample if presetting the distributed areas of multiple graduation marks
There are relatively large deviations, then return to execution second step.
Wherein, further comprising the steps of after third step:
4th step, using default cupping machine, the axial ends of metal stretching sample is fixed, is then drawn
Stretch test；
5th step, measurement metal stretching sample are after the stretch, surface calibration, corresponding with original gauge length default more
The total linear spacing distance of a equally spaced graduation mark, and the gauge length by total linear spacing distance as metal stretching sample after the stretch；
6th step, the mark of original gauge length and metal stretching sample after the stretch according to metal stretching sample before the stretching
Away from calculating obtains the elongation of metal stretching sample.
Wherein, in the 5th step, metal stretching sample is measured using vernier caliper after the stretch, surface calibration,
The total linear spacing distance of five graduation marks corresponding with original gauge length or ten graduation marks, total linear spacing distance are equal to interval five
The distance of a graduation mark or ten graduation marks.
By the above technical solution provided by the invention as it can be seen that compared with prior art, the present invention provides a kind of metals
The gauge length scaling method of tensile sample will not be caused to damage, be can be realized to metal stretching to the surface of metal stretching sample
The gauge length of sample is demarcated, so that metal stretching sample carries out tension test in the intact state, guarantees the accuracy of tension test
With the precision of measurement, is conducive to promote and apply, be of great practical significance.
Detailed description of the invention
Fig. 1 is a kind of flow chart of the gauge length scaling method of metal stretching sample provided by the invention；
Fig. 2 is a kind of gauge length scaling method of metal stretching sample provided by the invention, in embodiment one and embodiment two
Conducted in gauge length calibration surface structure simplified schematic diagram of the metal stretching sample after tinting；
Fig. 3 is a kind of gauge length scaling method of metal stretching sample provided by the invention, in one embodiment two of embodiment
The surface structure simplified schematic diagram of the metal stretching sample of carried out gauge length calibration before the stretching；
Fig. 4 is a kind of gauge length scaling method of metal stretching sample provided by the invention, is marked in the third embodiment
Surface structure simplified schematic diagram of the metal stretching sample away from calibration after tinting；
Fig. 5 is a kind of gauge length scaling method of metal stretching sample provided by the invention, is marked in the third embodiment
The surface structure simplified schematic diagram of metal stretching sample away from calibration before the stretching.
Specific embodiment
In order to enable those skilled in the art to better understand the solution of the present invention, with reference to the accompanying drawing with embodiment to this
Invention is described in further detail.
Referring to Fig. 1, the present invention provides a kind of gauge length scaling methods of metal stretching sample comprising following steps:
The first step, the metal stretching sample for needing to carry out tension test, measure its diameter；
In the present invention, it should be noted that metal stretching sample can need to carry out tension test for any one
Metalwork, such as can be metal bar, metal plate etc..
In the present invention, in the first step, vernier caliper can be used to measure the diameter of metal stretching sample.
Second step tints to the overall surface of metal stretching sample；
In the present invention, in second step, the oil pike of different colours can be used, to the whole table of metal stretching sample
It tints in face.For example, can be black oil pen, blue oil pike etc..
Third step, with the presupposition multiple of metal stretching specimen finish, as the original mark of metal stretching sample before the stretching
Away from, laser marking machine is then used, the part progress mark to the length of metal stretching specimen surface equal to original gauge length, calibration
It is corresponding with original gauge length, presetting multiple graduation marks, (these graduation marks are located in the length range of original gauge length, such as can be with
It is five or ten).
In the present invention, in the third step, in specific implementation, the presupposition multiple is preferably five times or ten times；
It is described it is corresponding with original gauge length preset multiple equally spaced graduation marks, specifically include five graduation marks or ten
A graduation mark.
It in the present invention, in the third step, can be according to metal with parameter setting interface for laser marking machine
Then the diameter and length of tensile sample carry out the laser marking for presetting multiple equally spaced graduation marks to select setting gauge length.
In specific implementation, for the present invention, for the metal stretching sample of different cross section shape, different metal materials,
Laser marking machine mark can be used, it is applied widely.
It should be noted that laser marking machine is to stamp permanent label in a variety of different material surfaces with laser beam.
The effect of mark is to expose deep layer substance by the evaporation of entry material, or lead to the chemicals of entry material by luminous energy
Reason changes and " quarter " goes out trace, or burns up moieties by luminous energy, pattern, the text etched needed for showing.
In the present invention, in the third step, in specific implementation, the laser marking machine can be existing laser marking
Machine, such as can be the LSF20D laser marking machine of Huagong Laser Engineering Co Ltd, Wuhan's production, configuration master
It to include 20W optical fiber laser, Chinese workers' customization high-velocity scanning galvanometer, wavelength lenses, computer control system, the customization of Chinese workers' laser
Software systems, customization communication software addend are according to transmission etc..The laser marking machine is succinctly light and handy, flexibly and easily, can satisfy big portion
Shunt excitation signal application.In the present invention, laser beam is mainly used, the colour substance that specimen surface is applied burns, and exposes metal
The linear trace of matrix color.
If should be noted laser marking machine after carrying out mark, the distributed areas of graduation mark are not very placed in the middle,
I.e. and the central region deviation of metal stretching sample is larger, then, need to return to execution second step.That is,
It can also include a gauge length calibration steps after three steps, specifically:
It is not the central region or and central region of metal stretching sample if presetting the distributed areas of multiple graduation marks
There are relatively large deviations, then return to execution second step.
Therefore, for the gauge length scaling method of metal stretching sample provided by the invention, simple to operate, gauge length mark
It is fixed clear, calcination only is carried out to the uvea of surface coating during mark, the surface of metal stretching sample will not be caused to damage
Wound, is used directly for mechanics of metal experimental field, production efficiency further increases, and production cost further decreases.
In order to further measure the elongation for obtaining metal stretching sample, the present invention further includes following after third step
Step:
4th step, using default cupping machine, the axial ends of metal stretching sample is fixed, is then drawn
Stretch test；
In the present invention, in the 4th step, in specific implementation, the default cupping machine can be existing any one
Kind is used for the testing machine of tension test, such as MTS Exceed (opening mark) testing machine of Ke Yi Wei Mei Tesi company production, the examination
Machine is tested by MTS SERVO CONTROL hydraulic actuation system, high speed, digital newspaper industry device, the six column load frames configuration of a whole set of high intensity
And TestSuite TW software system, it is compact-sized, it is easily operated, meet the integrated operating platform of ergonomics, energy
State and readability enough that the test button demarcated is stretched, that observation marks after stretching.
5th step, measurement metal stretching sample are after the stretch, surface calibration, corresponding with original gauge length default more
The total linear spacing distance of a equally spaced graduation mark, and the gauge length by total linear spacing distance as metal stretching sample after the stretch；
In the present invention, in the 5th step, vernier caliper can be used to measure metal stretching sample after the stretch, table
Face calibration, five graduation marks corresponding with original gauge length or ten graduation marks total linear spacing distance, the total linear spacing distance
Equal to the distance of five graduation marks in interval or ten graduation marks.
6th step, the mark of original gauge length and metal stretching sample after the stretch according to metal stretching sample before the stretching
Away from calculating obtains the elongation of metal stretching sample.
In the present invention, in step 6, in specific implementation, the gauge length of metal stretching sample after the stretch is drawn with metal
The difference that the original gauge length of sample before the stretching subtracts each other, then the original gauge length divided by metal stretching sample before the stretching are stretched, can be obtained
Obtain the elongation of metal stretching sample.
For the present invention, based on above technical solution, the gauge length of metal stretching specimen surface is high-visible, to sample table
Face has not a particle of damage, and guarantees that the elongation real result of measurement is reliable.
In order to more understand the present invention, below with reference to embodiment one to embodiment three, illustrate to provide according to the present invention
The gauge length scaling method of metal stretching sample, to the gauge length calibration of different metal stretching samples and the related mistake of tension test
Journey.
Embodiment one.
For the superalloy coupons of circular cross-section, with five times of diameter, before the stretching as the metal stretching sample
Original gauge length.
Firstly, tinting to metal stretching specimen surface: being coated using black oil pike to specimen surface, referring to fig. 2 institute
Show, in Fig. 2,1 is region of tinting；
Then, pass through laser marking machine parameter setting: opening laser marking machine, parameter setting interface is opened, according to sample
Length and gauge length setup parameter；
Then, gauge length is demarcated: test button being placed on mark platform, according to set parameter mark, i.e., to metal stretching
The part that length in sample is equal to original gauge length carries out mark, demarcate it is corresponding with original gauge length, preset it is multiple at equal intervals
Graduation mark (these graduation marks are located in the length range of original gauge length), shown in Figure 3, in Fig. 3,1 is tints region, 2
For the graduation mark formed after laser marking.
Finally, tension test is carried out, after the stretch, in view of the test button using this calibration, due to not having actually
The structural intergrity for destroying metal stretching sample, so that metal stretching sample carries out tension test, gauge length energy in the intact state
Enough to keep clear, sample is not damaged, and measurement elongation is genuine and believable.
Embodiment two.
The carbon constructional quality steel sample of circular cross-section is being drawn with five times of diameter as the metal stretching sample
Original gauge length before stretching, the appearance of the sample are the same as example 1, and only material is different.
Firstly, metal stretching specimen surface is tinted: specimen surface is coated using black oil pike, it is shown in Figure 2,
In Fig. 2,1 is region of tinting；
Then, laser marking machine parameter setting: opening laser marking machine, parameter setting interface is opened, according to specimen length
Shown in Figure 3 with gauge length setup parameter, in Fig. 3,1 is region of tinting, 2 graduation mark to be formed after laser marking；
Then, gauge length is demarcated: test button being placed on mark platform, according to set parameter mark, i.e., to metal stretching
The part that length in sample is equal to original gauge length carries out mark, demarcate it is corresponding with original gauge length, preset it is multiple at equal intervals
Graduation mark (these graduation marks are located in the length range of original gauge length)；
Finally, tension test is carried out, after the stretch, in view of the test button using this calibration, due to not having actually
The structural intergrity for destroying metal stretching sample, so that metal stretching sample carries out tension test, gauge length energy in the intact state
Enough to keep clear, sample is not damaged, and measurement elongation is genuine and believable.
Embodiment three:
For 25 millimeters of rectangular section sample of cross-sectional width, the yield strength of the sample is Q235B, straight with five times
Diameter, as the original gauge length of the metal stretching sample before the stretching.
Firstly, metal stretching specimen surface is tinted: specimen surface is coated using black oil pike, it is shown in Figure 4,
In Fig. 4,1 is region of tinting；
Then, laser marking machine parameter setting: opening laser marking machine, parameter setting interface is opened, according to specimen length
Shown in Figure 5 with gauge length setup parameter, in Fig. 5,1 is region of tinting, 2 graduation mark to be formed after laser marking；
Then, gauge length is demarcated: test button being placed on mark platform, according to set parameter mark, i.e., to metal stretching
The part that length in sample is equal to original gauge length carries out mark, demarcate it is corresponding with original gauge length, preset it is multiple at equal intervals
Graduation mark (these graduation marks are located in the length range of original gauge length).
Finally, tension test is carried out, after the stretch, in view of the Q235B sample using this calibration, due to not having actually
The structural intergrity for destroying metal stretching sample, so that metal stretching sample carries out tension test, gauge length energy in the intact state
Enough to keep clear, sample is not damaged, and measurement elongation is genuine and believable.
In conclusion compared with prior art, a kind of gauge length scaling method of metal stretching sample provided by the invention,
It will not cause to damage to the surface of metal stretching sample, the gauge length calibration to metal stretching sample can be realized, so that metal
Tensile sample carries out tension test in the intact state, guarantees the accuracy of tension test and the precision of measurement, is conducive to promote
Using being of great practical significance.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also answered
It is considered as protection scope of the present invention.
Claims (7)
1. a kind of gauge length scaling method of metal stretching sample, which comprises the following steps:
The first step, the metal stretching sample for needing to carry out tension test, measure its diameter；
Second step tints to the overall surface of metal stretching sample；
Third step, with the presupposition multiple of metal stretching specimen finish, as the original gauge length of metal stretching sample before the stretching, so
Laser marking machine is used afterwards, and the part for being equal to original gauge length to the length of metal stretching specimen surface carries out mark, demarcates and former
Beginning gauge length is corresponding, presets multiple equally spaced graduation marks.
2. the method as described in claim 1, which is characterized in that in the first step, measure metal stretching using vernier caliper
The diameter of sample.
3. the method as described in claim 1, which is characterized in that in second step, using the oil pike of different colours, to metal
The overall surface of tensile sample is tinted.
4. the method as described in claim 1, which is characterized in that in the third step, the presupposition multiple is five times or ten times；
It is described it is corresponding with original gauge length preset multiple equally spaced graduation marks, specifically include five graduation marks or ten quarter
Spend line.
5. the method as described in claim 1, which is characterized in that can also include a gauge length calibration step after third step
Suddenly, specifically:
If presetting the distributed areas of multiple graduation marks, it is not the central region of metal stretching sample or exists with central region
Relatively large deviation then returns to execution second step.
6. the method as described in any one of claims 1 to 5, which is characterized in that further include following step after third step
It is rapid:
4th step, using default cupping machine, the axial ends of metal stretching sample is fixed, stretching examination is then carried out
It tests；
5th step, measurement metal stretching sample after the stretch, surface calibration, it is corresponding with original gauge length preset it is multiple etc.
The total linear spacing distance of the graduation mark at interval, and the gauge length by total linear spacing distance as metal stretching sample after the stretch；
6th step, the gauge length of original gauge length and metal stretching sample after the stretch according to metal stretching sample before the stretching, meter
Calculate the elongation for obtaining metal stretching sample.
7. method as claimed in claim 6, which is characterized in that in the 5th step, measure metal stretching using vernier caliper
Sample after the stretch, surface calibration, the total linear spacing of five graduation marks corresponding with original gauge length or ten graduation marks
Distance, total linear spacing distance are equal to the distance of five graduation marks in interval or ten graduation marks.
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| CN112213188A (en) * | 2020-09-16 | 2021-01-12 | 江苏华久辐条制造有限公司 | Method for detecting strength of cold-rolled strip steel |
| CN113295093A (en) * | 2021-06-18 | 2021-08-24 | 常州高光半导体材料有限公司 | Precision metal mask plate stretching accuracy detection method |
| CN115326594A (en) * | 2022-07-28 | 2022-11-11 | 本钢板材股份有限公司 | Displacement measurement method for high-speed shearing deformation of material |
| CN116202890A (en) * | 2023-05-05 | 2023-06-02 | 山东路达试验仪器有限公司 | Intelligent measuring system and method for elongation of steel bar based on machine vision |
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