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 PDF

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Publication number
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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China
Prior art keywords
test
vernier caliper
wide seat
load
latch
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CN2012100943336A
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CN102620635B (en
Inventor
陈洪波
戴洪波
李宏达
陈新慧
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Tiefa Coal Industry (group) Supervision And Inspection Center LLC
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Tiefa Coal Industry (group) Supervision And Inspection Center LLC
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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

The assay method of elongation during colliery narrow gage vehicle connector tensile test
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:
If
Figure 2012100943336100002DEST_PATH_IMAGE006
Figure 2012100943336100002DEST_PATH_IMAGE008
Then:
Figure 2012100943336100002DEST_PATH_IMAGE010
It is thus clear that when test specimen arrangement parallelly connected with dial gauge; The error that is produced is directly proportional with the first power of the straightness error of movable workbench
Figure 997418DEST_PATH_IMAGE002
, and is much bigger when this error amount ratio is installed in series.
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
Figure 2012100943336100002DEST_PATH_IMAGE012
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
Figure 2012100943336100002DEST_PATH_IMAGE016
As follows:
Figure 2012100943336100002DEST_PATH_IMAGE018
The vernier reading of the main scale height of wide seat vernier caliper+wide seat vernier caliper 1
Wherein:
Figure 2012100943336100002DEST_PATH_IMAGE020
-test specimen length is the length value of unit with the millimeter;
Figure 2012100943336100002DEST_PATH_IMAGE022
- the actual length of the specimen with The difference is less than
Figure 2012100943336100002DEST_PATH_IMAGE024
section;
The distance of the lower surface of
Figure 2012100943336100002DEST_PATH_IMAGE026
-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;
Figure 2012100943336100002DEST_PATH_IMAGE028
-on test latch (5) diameter or the following diameter of test latch (6);
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
Figure 881246DEST_PATH_IMAGE014
Be increased to test load
Figure 214138DEST_PATH_IMAGE012
, 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
Figure 2012100943336100002DEST_PATH_IMAGE030
, that is:
Figure 2012100943336100002DEST_PATH_IMAGE032
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
Figure 832771DEST_PATH_IMAGE012
Drop to and initial load
Figure 592916DEST_PATH_IMAGE014
Identical final load
Figure 2012100943336100002DEST_PATH_IMAGE034
, utilize length once more with method test specimen this moment of " 4. " step
Figure 2012100943336100002DEST_PATH_IMAGE036
, that is:
Figure 2012100943336100002DEST_PATH_IMAGE038
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
Figure 2012100943336100002DEST_PATH_IMAGE040
of test specimen after bearing test load, that is:
Figure 2012100943336100002DEST_PATH_IMAGE042
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
Figure 735316DEST_PATH_IMAGE040
of frameing shift; Like Fig. 1: establish wide seat vernier caliper long
Figure 2012100943336100002DEST_PATH_IMAGE048
; Then measuring error
Figure 557385DEST_PATH_IMAGE040
is
Figure 2012100943336100002DEST_PATH_IMAGE052
to the chi frame and poor
Figure 2012100943336100002DEST_PATH_IMAGE056
of
Figure 2012100943336100002DEST_PATH_IMAGE054
for
Figure 2012100943336100002DEST_PATH_IMAGE050
at the inclination angle in moving process, the projection
Figure 2012100943336100002DEST_PATH_IMAGE060
on
Figure 2012100943336100002DEST_PATH_IMAGE058
direction promptly:
Figure 2012100943336100002DEST_PATH_IMAGE064
:
Figure 2012100943336100002DEST_PATH_IMAGE068
Trigonometric function formula according to times angle:
Figure 2012100943336100002DEST_PATH_IMAGE070
When
Figure 792975DEST_PATH_IMAGE002
Angle very hour
Figure 2012100943336100002DEST_PATH_IMAGE072
( to radians)
At last:
Figure 2012100943336100002DEST_PATH_IMAGE074
If
Figure 602985DEST_PATH_IMAGE006
Figure 2012100943336100002DEST_PATH_IMAGE076
Then
Figure 2012100943336100002DEST_PATH_IMAGE080
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
Figure 90729DEST_PATH_IMAGE002
, and its measuring error was littler in enough hour at
Figure 299601DEST_PATH_IMAGE002
.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
Figure 667128DEST_PATH_IMAGE012
by pulling force, make load reduce to initial load
Figure 95704DEST_PATH_IMAGE014
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:
Figure 996926DEST_PATH_IMAGE018
The vernier reading of the chi height of wide seat vernier caliper 8+wide seat vernier caliper 8 1
Wherein:
Figure 578080DEST_PATH_IMAGE020
-test specimen length is the length value of unit with the millimeter;
?
Figure 100197DEST_PATH_IMAGE022
- the actual length of the specimen with
Figure 829119DEST_PATH_IMAGE020
the difference is less than
Figure 845617DEST_PATH_IMAGE024
section;
The distance of the lower surface of
Figure 46658DEST_PATH_IMAGE026
-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;
Figure 755988DEST_PATH_IMAGE028
-on test latch 5 diameters or the following diameter of test latch 6.
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
Figure 706626DEST_PATH_IMAGE014
Be increased to test load
Figure 776083DEST_PATH_IMAGE012
, 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
Figure 2012100943336100002DEST_PATH_IMAGE084
, that is:
Figure 66250DEST_PATH_IMAGE032
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
Figure 697213DEST_PATH_IMAGE012
Drop to and initial load
Figure 72831DEST_PATH_IMAGE014
Identical final load
Figure 680399DEST_PATH_IMAGE034
, utilize the length L 3 with method test specimen this moment of " 4. " step once more, that is:
Figure 2012100943336100002DEST_PATH_IMAGE086
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
Figure 90651DEST_PATH_IMAGE040
of test specimen after bearing test load, that is:
Figure 889587DEST_PATH_IMAGE042
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 :
Figure 976809DEST_PATH_IMAGE046
.L among Fig. 1 represents the length value of different times, for example:
Figure 225256DEST_PATH_IMAGE082
,
Figure 2012100943336100002DEST_PATH_IMAGE088
or
Figure 2012100943336100002DEST_PATH_IMAGE090
.
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
Figure 485915DEST_PATH_IMAGE014
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 (
Figure 2012100943336100001DEST_PATH_IMAGE001
) by pulling force, make load reduce to initial load (
Figure 923646DEST_PATH_IMAGE002
) 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 (
Figure 2012100943336100001DEST_PATH_IMAGE003
) as follows:
Figure 972635DEST_PATH_IMAGE004
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 actual length of the specimen with
Figure 791873DEST_PATH_IMAGE005
the difference is less than
Figure 2012100943336100001DEST_PATH_IMAGE007
section;
The distance of the lower surface of
Figure 367954DEST_PATH_IMAGE008
-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;
Figure 2012100943336100001DEST_PATH_IMAGE009
-on test latch (5) diameter or the following diameter of test latch (6);
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 (
Figure 289643DEST_PATH_IMAGE002
) be increased to test load (
Figure 836162DEST_PATH_IMAGE001
), 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 (
Figure 9654DEST_PATH_IMAGE010
), that is:
Figure 2012100943336100001DEST_PATH_IMAGE011
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 (
Figure 646434DEST_PATH_IMAGE001
) drop to initial load (
Figure 614390DEST_PATH_IMAGE002
) identical final load (
Figure 897473DEST_PATH_IMAGE012
), utilize once more with the length of method test specimen this moment of " 4. " step (
Figure 2012100943336100001DEST_PATH_IMAGE013
), that is:
Figure 249824DEST_PATH_IMAGE014
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 (
Figure DEST_PATH_IMAGE015
) of test specimen after bearing test load, that is:
Figure 52695DEST_PATH_IMAGE016
The vernier reading of wide seat vernier caliper 3The vernier reading of-wide seat vernier caliper 1
2. the assay method of elongation during colliery according to claim 1 narrow gage vehicle connector tensile test, it is characterized in that: the numerical value according to claim 1 draws the permanent elongation (
Figure DEST_PATH_IMAGE017
) of test specimen behind test load:
Figure 378503DEST_PATH_IMAGE018
.
CN201210094333.6A 2012-04-01 2012-04-01 Method for measuring elongation of coal mine narrow gage vehicle connector in tension test Expired - Fee Related CN102620635B (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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

Patent Citations (5)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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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