CN102620635A - Method for measuring elongation of coal mine narrow gage vehicle connector in tension test - Google Patents
Method for measuring elongation of coal mine narrow gage vehicle connector in tension test Download PDFInfo
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- CN102620635A CN102620635A CN2012100943336A CN201210094333A CN102620635A CN 102620635 A CN102620635 A CN 102620635A CN 2012100943336 A CN2012100943336 A CN 2012100943336A CN 201210094333 A CN201210094333 A CN 201210094333A CN 102620635 A CN102620635 A CN 102620635A
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- test
- vernier caliper
- wide seat
- load
- latch
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Abstract
The invention provides a method for measuring elongation of a coal mine narrow gage vehicle connector in a tension test. The method provided by the invention can directly measure the length and elongation of a work piece, which is to say that the method adopts serial measurement manner, namely a measurement axial line and a reference axial line are in a same line. The accuracy of measurement results is correlated to the adopted comparison manner, namely correlated to the position arrangement of the measurement axial line and the reference axial line. Through the measurement manner provided by the invention, the errors of the measurement results are smaller, and the judgment to the elongation of the coal mine narrow gage vehicle connector is more accurate.
Description
Technical field
The assay method of elongation when the present invention relates to a kind of colliery narrow gage vehicle connector tensile test.
Background technology
What original colliery narrow gage vehicle connector tensile test adopted is parallel measuring method, just utilizes dial gauge and test specimen to carry out parallelly connected measurement, and the measurement axis and the datum axis of this method do not overlap, and both are at a distance of a segment distance.
To detect the ring chain elongation is example; When doing experiment; Slide fastener stretching place has one section long lateral separation with detection with dial gauge; And worktable is not necessarily absolute rectilinear motion when stretching; If during the absolute rectilinear motion of worktable one corner
is arranged, then introduce measuring error and be:
Summary of the invention
Goal of the invention: the assay method of elongation when the present invention provides a kind of colliery narrow gage vehicle connector tensile test its objective is the solution big problem of measuring method error in the past.
Technical scheme: the present invention realizes through following technical scheme:
The assay method of elongation during a kind of colliery narrow gage vehicle connector tensile test, it is characterized in that: the step of this method is following:
1., test fixture and being installed on respectively on the upper and lower examination platform of testing machine up and down;
2., use the test latch ring chain on the top of test specimen be connected to test fixture, be connected to down test fixture with testing the bottom ring chain of latch down with test specimen;
3., service test machine; Make test specimen increased to 1/2nd of test load
by pulling force, make load reduce to initial load
then;
4., measure test specimen length: with the wide seat seat of wide seat vernier caliper on the upper surface of following test fixture; The chi frame that moves up makes the measuring head contact of wide seat vernier caliper go up the lower surface of test fixture and make the measuring head of wide seat vernier caliper vertical with the lower surface of last test fixture;
At this moment, record test specimen length
As follows:
The vernier reading of the main scale height of wide seat vernier caliper+wide seat vernier caliper
1
The distance of the lower surface of
-upward test fixture (3) upper limb of test latch (6) to the distance of the lower edge of last test latch (5) or under the upper surface of test fixture (4) is arrived down, these two distances equate;
Be that test latch=∮ tests latch down on the d=∮
5., the service test machine, last testing table moves up, and makes test specimen receive pulling force by initial load
Be increased to test load
, measure the length after the pulling force that receives of test specimen this moment according to the method for " 4. " step with wide seat vernier caliper
, that is:
The vernier reading of the main scale height of wide seat vernier caliper+wide seat vernier caliper
2
6., service test machine once more, on try platform and move down, make test specimen stressed by test load
Drop to and initial load
Identical final load
, utilize length once more with method test specimen this moment of " 4. " step
, that is:
The vernier reading of the main scale height of wide seat vernier caliper+wide seat vernier caliper
3
7., utilize " 6. " step to draw numerical value that numerical value draws with " 4. " step to do difference and promptly get the permanent elongation
of test specimen after bearing test load, that is:
The vernier reading of wide seat vernier caliper
3The vernier reading of-wide seat vernier caliper
1
Authority to require a value based on specimens obtained after the test load permanent elongation
:
.
Advantage and effect: the assay method of elongation when the present invention provides a kind of colliery narrow gage vehicle connector tensile test; Method of the present invention can directly record Workpiece length and elongation; What that is to say that the present invention adopts is the series connection measuring mode, promptly measures axis and datum axis and is on the same straight line.And the comparative pattern that the accuracy of measurement result is adopted when measuring is relevant, promptly relevant with the position arrangement of measuring axis, datum axis.Testing ring chain with wide seat vernier caliper among the present invention is example: because the chi frame is not that safe straight line moves; At this moment its result has just introduced the chi moving straightness error
of frameing shift; Like Fig. 1: establish wide seat vernier caliper long
; Then measuring error
is
to the chi frame and poor
of
for
at the inclination angle in moving process, the projection
on
direction promptly:
:
Trigonometric function formula according to times angle:
It is thus clear that when measuring axis and datum line point-blank the time; The measuring error of being introduced by the straightness error of movable workbench is directly proportional with the quadratic power of straightness error
, and its measuring error was littler in enough hour at
.Measurement form of the present invention thus makes that the error of measurement result is littler, and is also more accurate for the judgement of judging colliery narrow gage vehicle connector elongation.
Description of drawings:
Fig. 1 is a measurement embodiment synoptic diagram of the present invention.
Embodiment:Below in conjunction with accompanying drawing the present invention is done further explanation:
As shown in Figure 1, the assay method of elongation when the present invention provides a kind of colliery narrow gage vehicle connector tensile test, it is characterized in that: the step of this method is following:
1., test fixture 3 and 4 is installed on respectively on the upper and lower examination platform of testing machine up and down;
2., use test latch 5 ring chain on the top of test specimen 7 be connected to test fixture 3, be connected to down test fixture 4 with testing the bottom ring chain of latch 6 down with test specimen 7;
3., service test machine; Make test specimen 7 increased to 1/2nd of test load
by pulling force, make load reduce to initial load
then; Record the initial length value like this.
4., measure test specimen length: with the wide seat seat of wide seat vernier caliper 8 on the upper surface of following test fixture 4; The chi frame that moves up makes the measuring head contact of wide seat vernier caliper 8 go up the lower surface of test fixture 3 and make the measuring head of wide seat vernier caliper 8 vertical with the lower surface of last test fixture 3;
At this moment, record test specimen length
As follows:
The vernier reading of the chi height of wide seat vernier caliper 8+wide seat vernier caliper 8
1
The distance of the lower surface of
-upward test fixture 3 upper limb of test latch 6 to the distance of the lower edge of last test latch 5 or under the upper surface of test fixture 4 is arrived down, these two distances equate;
Test latch 5=∮ tests latch 6 down on the d=∮
5., the service test machine, last testing table moves up, and makes test specimen receive pulling force by initial load
Be increased to test load
, measure the length after the pulling force that receives of test specimen 7 this moment according to the method for " 4. " steps with wide seat vernier caliper 8
, that is:
The vernier reading of the chi height of wide seat vernier caliper+wide seat vernier caliper
2
6., service test machine once more, on try platform and move down, make test specimen stressed by test load
Drop to and initial load
Identical final load
, utilize the length L 3 with method test specimen this moment of " 4. " step once more, that is:
The vernier reading of the chi height of wide seat vernier caliper+wide seat vernier caliper
3
7., utilize " 6. " step to draw numerical value that numerical value draws with " 4. " step to do difference and promptly get the permanent elongation
of test specimen after bearing test load, that is:
The vernier reading of wide seat vernier caliper
3The vernier reading of-wide seat vernier caliper
1
According to the numerical results of the test specimen after load permanent elongation
:
.L among Fig. 1 represents the length value of different times, for example:
,
or
.
If there are not the maximum dead load data of connector test specimen 7 in this method, then the numerical value of test load
and initial load
is confirmed by following table:
Connector test specimen diameter (mm) | 28 | 30 | 32 | 38 |
Test load (kN) | 110 | 110 | 120 | 140 |
Initial load (klN) | 25 | 26 | 30 | 40 |
Claims (2)
1. the assay method of elongation during a colliery narrow gage vehicle connector tensile test, it is characterized in that: the step of this method is following:
1., test fixture (3) and (4) are installed on respectively on the upper and lower examination platform of testing machine up and down;
2., use test latch (5) ring chain on the top of test specimen (7) be connected to test fixture (3), be connected to down test fixture (4) with testing the bottom ring chain of latch (6) down with test specimen (7);
3., service test machine; Make test specimen (7) increased to 1/2nd of test load (
) by pulling force, make load reduce to initial load (
) then;
4., measure test specimen length: with the wide seat seat of wide seat vernier caliper (8) on the upper surface of following test fixture (4); The chi frame that moves up makes the measuring head contact of wide seat vernier caliper (8) go up the lower surface of test fixture (3) and make the measuring head of wide seat vernier caliper (8) vertical with the lower surface of last test fixture (3);
At this moment, record test specimen length (
) as follows:
The vernier reading of the main scale height+wide seat vernier caliper (8) of wide seat vernier caliper (8)
1
Wherein:
-test specimen length is the length value of unit with the millimeter;
The distance of the lower surface of
-upward test fixture (3) upper limb of test latch (6) to the distance of the lower edge of last test latch (5) or under the upper surface of test fixture (4) is arrived down, these two distances equate;
Be that test latch (5)=∮ tests latch (6) down on the d=∮
5., the service test machine, last testing table moves up, make test specimen receive pulling force by initial load (
) be increased to test load (
), with wide seat vernier caliper (8) according to the method for " 4. " step measure test specimen this moment (7) receive after the pulling force length (
), that is:
The vernier reading of the main scale height of wide seat vernier caliper+wide seat vernier caliper
2
6., service test machine once more, on try platform and move down, make test specimen stressed by test load (
) drop to initial load (
) identical final load (
), utilize once more with the length of method test specimen this moment of " 4. " step (
), that is:
The vernier reading of the main scale height of wide seat vernier caliper+wide seat vernier caliper
3
7., utilize " 6. " step to draw numerical value that numerical value draws with " 4. " step to do difference and promptly get the permanent elongation (
) of test specimen after bearing test load, that is:
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201210094333.6A CN102620635B (en) | 2012-04-01 | 2012-04-01 | Method for measuring elongation of coal mine narrow gage vehicle connector in tension test |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201210094333.6A CN102620635B (en) | 2012-04-01 | 2012-04-01 | Method for measuring elongation of coal mine narrow gage vehicle connector in tension test |
Publications (2)
Publication Number | Publication Date |
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CN102620635A true CN102620635A (en) | 2012-08-01 |
CN102620635B CN102620635B (en) | 2014-06-11 |
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ID=46560710
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CN201210094333.6A Expired - Fee Related CN102620635B (en) | 2012-04-01 | 2012-04-01 | Method for measuring elongation of coal mine narrow gage vehicle connector in tension test |
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CN (1) | CN102620635B (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108801803A (en) * | 2018-08-09 | 2018-11-13 | 攀钢集团攀枝花钢铁研究院有限公司 | Mine car bolt bending resistance detection method and mine car bolt bending resistance detection device |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN1123908A (en) * | 1995-05-05 | 1996-06-05 | 新汶矿务局职工大学 | Determination of deformation of connecting chain between narrow rail vehicles for mines |
CN2290052Y (en) * | 1997-03-03 | 1998-09-02 | 新汶矿务局职工大学 | Connecting device for ring test piece pulling test |
DE10357577A1 (en) * | 2003-12-08 | 2005-07-07 | Faurecia Innenraum Systeme Gmbh | Device for determining an elongation property |
JP3873443B2 (en) * | 1998-03-31 | 2007-01-24 | 株式会社島津製作所 | Elongation measuring device |
KR100726982B1 (en) * | 2005-03-08 | 2007-06-14 | 대경테크 주식회사 | Extensometer measurement device for tension tester |
-
2012
- 2012-04-01 CN CN201210094333.6A patent/CN102620635B/en not_active Expired - Fee Related
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN1123908A (en) * | 1995-05-05 | 1996-06-05 | 新汶矿务局职工大学 | Determination of deformation of connecting chain between narrow rail vehicles for mines |
CN2290052Y (en) * | 1997-03-03 | 1998-09-02 | 新汶矿务局职工大学 | Connecting device for ring test piece pulling test |
JP3873443B2 (en) * | 1998-03-31 | 2007-01-24 | 株式会社島津製作所 | Elongation measuring device |
DE10357577A1 (en) * | 2003-12-08 | 2005-07-07 | Faurecia Innenraum Systeme Gmbh | Device for determining an elongation property |
KR100726982B1 (en) * | 2005-03-08 | 2007-06-14 | 대경테크 주식회사 | Extensometer measurement device for tension tester |
Non-Patent Citations (1)
Title |
---|
刘贵宝等: "煤矿窄轨车辆连接器拉力试验伸长量测定方法", 《理化检验-物理分册》 * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108801803A (en) * | 2018-08-09 | 2018-11-13 | 攀钢集团攀枝花钢铁研究院有限公司 | Mine car bolt bending resistance detection method and mine car bolt bending resistance detection device |
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Publication number | Publication date |
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CN102620635B (en) | 2014-06-11 |
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