CN109737847A - A kind of rail variable cross-section dimensional measurement ruler - Google Patents

A kind of rail variable cross-section dimensional measurement ruler Download PDF

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CN109737847A
CN109737847A CN201910152395.XA CN201910152395A CN109737847A CN 109737847 A CN109737847 A CN 109737847A CN 201910152395 A CN201910152395 A CN 201910152395A CN 109737847 A CN109737847 A CN 109737847A
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vernier
main scale
measuring claw
rail
scale
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CN109737847B (en
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薛建中
谭洪均
李宇
朱欣欣
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China Railway Materials Technology Co Ltd
China Railway Materials General Operation and Maintenance Technology Co Ltd
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China Railway Materials Technology Co Ltd
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Abstract

The present invention discloses a kind of rail variable cross-section dimensional measurement ruler, including reference seat, main scale, main scale vernier, auxiliary scale, auxiliary scale vernier and positioning vernier;The reference seat top surface is as measurement datum;Main scale bottom end is fixed with reference seat;Socket from top to bottom can be along the main scale vernier and positioning vernier that main scale slides up and down on main scale.Positioning vernier measuring claw is equipped on the right side of above-mentioned positioning vernier, right side is vertical, as the first measuring surface;It is connected on the right side of main scale vernier with auxiliary scale left end;Being socketed in auxiliary scale can be along the auxiliary scale vernier that auxiliary scale horizontally slips.Auxiliary scale vernier measuring claw is equipped with below auxiliary scale vernier, auxiliary scale vernier measuring claw left side is vertical, and lower end surface is horizontal, respectively as the second measuring surface and third measuring surface.The left end of above-mentioned main scale vernier and reference seat can separately design main scale vernier measuring claw and reference seat measuring claw.Rail variable cross-section dimensional measurement ruler of the present invention improves measurement accuracy, is integrated with the measurement function of a variety of measurers, measures convenience and high-efficiency.

Description

A kind of rail variable cross-section dimensional measurement ruler
Technical field
The present invention relates to railroad track technical fields, and in particular to a kind of variable cross-section dimensional measurement of railroad turnout steel rail part processing district Multifunction vernier calliper.
Background technique
The rail parts such as tongue, long heart rail, short heart rail in track switch need from 0mm gradually to process its front end rail head width It is transitioned into former material width, several control sections are arranged in intermediate variable cross-section area, and the rail by measuring control section is high, rail head is wide To control the processing line style in variable cross-section area.
The rail head width of rail refers to gauge line position rail head working edge and inoperative side distance between two points, usual situation Under, under gauge line Distance Theory rail top surface at 16mm.Since tongue, Xin Gui variable cross-section area rail heights of roofs gradually change, because This is it needs to be determined that its gauge line position, then measures its width.
When actual measurement, using 300mm long pawl vernier caliper, practical rail height is first measured, then calculates gauge line away from reality The high distance H of border rail, then it is high by H value setting tooth with thickness calipers, gauge line is navigated to, then measure rail head width with transverse tooth thickness ruler.
This method is the simplest method in practice, but still has shortcoming: need to carry thickness calipers and Two kinds of measuring tools of 300mm long pawl vernier caliper, gauge line position needs to calculate, and the measurement of thickness calipers and vernier caliper Face is all narrow, and rail top surface is laterally arc surface in addition, and longitudinal is inclined-plane, and blade is easy to all around incline in measurement process Tiltedly, it is not easy to ajust, generates biggish measurement error.
The patent of invention (patent No. CN203837607) of State Intellectual Property Office's authorization on 09 17th, 2014 " is used for steel The vernier caliper of rail cross dimensions detection ", structure can measure the relative position of ipsilateral two positions of rail, reduce template number The function of amount, but do not have the structure feature of measurement rail height and rail head clear span;The patent of invention of authorization on 01 20th, 2016 is (specially Benefit CN204988062) " a kind of AT tongue section survey vernier caliper ", it can only realize that the tongue section of 1:4 machining angle is high Degree and rail head width, but the section width of the tongue and long heart rail, short heart rail to other processing gradients, then do not have corresponding Structure feature.
Summary of the invention
It is asked present invention seek to address that the measuring tool mentioned in background technique is more, measurement is inconvenient, measurement result precision is low Topic proposes the rail variable cross-section dimensional measurement trip that a kind of function is integrated, measuring result error is small, measurement is convenient, versatility is good Slide calliper rule are marked, the function of a variety of measuring tools is integrated into a vernier scale.
A kind of rail variable cross-section dimensional measurement ruler, including reference seat, main scale, main scale vernier, auxiliary scale, auxiliary scale vernier and positioning Vernier.
The reference seat is bar shaped plate structure, and top surface is horizontal plane, as measurement datum;Main scale bottom end and reference seat It is fixed;Socket from top to bottom can be along the main scale vernier and positioning vernier that main scale slides up and down on main scale.
It is equipped with positioning vernier measuring claw on the right side of above-mentioned positioning vernier, positions the measurement base of vernier measuring claw bottom surface and reference seat Quasi- face is parallel, and right side is vertical, as the first measuring surface;It is connected on the right side of main scale vernier with auxiliary scale left end;Auxiliary scale and reference seat Datum level is parallel;Being socketed in auxiliary scale can be along the auxiliary scale vernier that auxiliary scale horizontally slips.
Auxiliary scale vernier measuring claw is equipped with below auxiliary scale vernier, auxiliary scale vernier measuring claw left side is vertical, and lower end surface is horizontal, point It Zuo Wei not the second measuring surface and third measuring surface.
When positioning vernier and main scale vernier contacts, positioning vernier measuring claw bottom surface and auxiliary scale vernier measuring claw bottom surface are total Face;If the right side of positioning vernier measuring claw is bonded with auxiliary scale vernier measuring claw left side, auxiliary scale reading is 0mm at this time.
The left end of above-mentioned main scale vernier and reference seat can separately design main scale vernier measuring claw and reference seat measuring claw.Main scale Vernier measuring claw is equal with reference seat measuring claw Design of length, and main scale vernier measuring claw and reference seat measuring claw outside end design For the identical horizontal plane of thickness, there is opposite interior measuring surface and reversed external pelivimetry face.Wherein surveyed in reference seat measuring claw Amount face is coplanar with the datum level of reference seat;And above-mentioned auxiliary scale vernier measuring claw bottom surface, positioning vernier measuring claw bottom surface and main scale The measurement datum co-planar contacts that measuring surface lower end surface can simultaneously with reference seat in vernier measuring claw, main scale reading is 0mm at this time.
Rail variable cross-section dimensional measurement ruler of the present invention, measurement method are as follows:
When measuring rail variable cross-section rail head width, main scale vernier is moved first, and making its reading is gauge line height, then The lock-screw on main scale vernier is tightened, then positioning vernier is moved up and is close to main scale vernier, and on screwed in place vernier Lock screw.Then, the lock screw on main scale vernier is unclamped, main scale vernier is moved up, keeps the height of main scale vernier big In rail height, reference seat is adsorbed on the rail bottom at tested rail Measure section perpendicular to rail length direction at this time, and move Dynamic reference seat is bonded positioning vernier measuring claw with rail head of rail.It contacts, locks with positioning vernier finally, putting down main scale vernier Lock screw on main scale, while the position of auxiliary scale vernier is adjusted, contact auxiliary scale vernier measuring claw with tested rail head of rail, this When auxiliary scale reading be measured position rail head width.
After being measured rail head width in a manner described, the lock screw on main scale vernier is unclamped, main scale is lifted up Vernier, and mobile auxiliary scale vernier, are in auxiliary scale vernier measuring claw lower end surface above tested rail profile highest point, lock at this time Lock screw on auxiliary scale vernier.Then, main scale vernier is fallen downwards, and it is disconnected that auxiliary scale vernier measuring claw lower end surface is in tested rail Face highest point is exactly in contact with, and main scale reading is that the section rail is high at this time.
When measuring aperture, positioning vernier is moved on into bottom, with the exterior measuring of reference seat measuring claw and main scale vernier measuring claw It measures face paste and leans on hole inner wall relative position, main scale reading adds two measuring claw thickness, as bore dia at this time.
When the height of center distance between holes rail bottom, when carrying out hole center away from rail bottom elevation carrection, by reference seat measuring claw It is parallel with axially bored line with main scale vernier measuring claw length direction and in same vertical plane, face paste will be measured in reference seat measuring claw By rail bottom face, mobile main scale vernier makes the external pelivimetry face of main scale vernier measuring claw withstand hole upper end inner wall, and main scale reading adds at this time A upper measuring claw thickness subtracts pore radius again, and as hole center is away from rail bottom height.
The invention has the advantages that
1, the invention discloses a kind of rail variable cross-section dimensional measurement rulers, when solving railroad turnout steel rail variable cross-section dimensional measurement Measurer is not easy the problem that measurement result precision is low caused by ajusting, and improves measurement accuracy;
2, the invention discloses a kind of rail variable cross-section dimensional measurement ruler, it is integrated with the measurement function of a variety of measurers, is had The functions such as rail variable cross-section area rail height, rail head width, rail bottom width, aperture, hole height are measured, the survey of rail variable cross-section size is reduced Amount measurer type used.
3, the invention discloses a kind of rail variable cross-section dimensional measurement ruler, rail variable cross-section processing district height and rail are realized Head width one-shot measurement is completed, and without calculating gauge line position or conversion measured value, measures convenience and high-efficiency.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of rail variable cross-section dimensional measurement ruler of the present invention;
Fig. 2 is that rail variable cross-section dimensional measurement ruler of the present invention carries out rail variable cross-section rail head width measurement schematic diagram;
Fig. 3 is that rail variable cross-section dimensional measurement ruler of the present invention carries out rail profile rail high measurement schematic diagram;
Fig. 4 is that rail variable cross-section dimensional measurement ruler of the present invention carries out elevation carrection schematic diagram of the hole center away from rail bottom.
In figure:
1- reference seat 2- main scale 3- main scale vernier
4- auxiliary scale 5- auxiliary scale vernier 6- positions vernier
7- clamping screw 8- limit screw 101- magnet mounting groove
301- main scale vernier measuring claw 302- reference seat measuring claw 501- auxiliary scale vernier measuring claw
601- positions vernier measuring claw
Specific embodiment
The present invention is described in detail with reference to the accompanying drawing.
A kind of rail variable cross-section dimensional measurement ruler of the present invention, including reference seat 1, main scale 2, main scale vernier 3, auxiliary scale 4, auxiliary scale Vernier 5 and positioning vernier 6, as shown in Figure 1.
The reference seat 1 is bar shaped plate structure, is laterally arranged, top surface is horizontal plane, as measurement datum.Reference seat 1 middle part, which is equipped with magnet mounting groove 101 at 3, to place magnet makes reference seat 1 can be adsorbed on the measurement base of different testees On quasi- face, and magnet mounting groove 101 is respectively more firm on the left, center, right position of reference seat 1, making to adsorb at above-mentioned 3.
The main scale 2 is vertically arranged with reference seat 1, and bottom end is positioned by pin shaft and reference seat 1, and passes through bolt and benchmark Seat 1 tightens fixation, main scale 2 can also be passed through welding by being integrally machined, or by main scale 2 and reference seat 1 with reference seat 1 It forms.Socket from top to bottom can be along the main scale vernier 3 and positioning vernier 6 that main scale slides up and down on main scale 2.Main scale vernier 3 and fixed Position vernier 6 can be digital display vernier or mechanical vernier;Threaded hole, threaded hole internal screw thread are opened up on main scale vernier 3 and positioning vernier 6 Installation locking bolt 7 makes 7 end of clamping screw hold out against main scale 2, realizes main scale vernier 3 and positioning by tightening clamping screw 7 Position between vernier 6 and main scale 2 is fixed.2 upper end of main scale is also equipped with limit screw 8, for limiting main scale vernier 3 and positioning trip The movement of mark 6 prevents main scale vernier 3 and positioning vernier 6 from skidding off main scale 2.
Positioning vernier measuring claw 601, positioning 601 bottom surface of vernier measuring claw and reference seat 1 are equipped on the right side of above-mentioned positioning vernier 6 Measurement datum it is parallel, right side is vertical, as the first measuring surface.
Above-mentioned 3 right side of main scale vernier is connected with 4 left end of auxiliary scale.Auxiliary scale 4 is parallel with the datum level of reference seat 1.It is covered in auxiliary scale 4 Being connected to can be along the auxiliary scale vernier 5 that auxiliary scale 4 horizontally slips.Equally, threaded hole, the installation of threaded hole internal screw thread are opened up on auxiliary scale vernier 5 Clamping screw 7 makes 7 end of clamping screw hold out against auxiliary scale 4, realizes between auxiliary scale vernier 5 and auxiliary scale 4 by tightening clamping screw 7 Position is fixed;And 4 right end of auxiliary scale is equipped with limit screw 8, for limiting the movement of auxiliary scale vernier 5, prevents auxiliary scale vernier 5 from skidding off Auxiliary scale 4.Auxiliary scale vernier measuring claw 501 is equipped with below auxiliary scale vernier 5,501 left sides of auxiliary scale vernier measuring claw are vertical, lower end surface water It is flat, respectively as the second measuring surface and third measuring surface;And when positioning vernier 6 and main scale vernier 3 contacts, positioning vernier measurement 601 bottom surface of pawl is coplanar with auxiliary scale vernier 501 bottom surfaces of measuring claw;At this time when auxiliary scale vernier 5 is close to main scale vernier 3, vernier is positioned The right side of measuring claw 601 is bonded with 501 left side of auxiliary scale vernier measuring claw, and the reading of auxiliary scale 4 is 0mm at this time.
When the present invention measures rail variable cross-section rail head width, main scale vernier 3 is moved first, and making its reading is that gauge line is high Then degree tightens the lock-screw 7 on main scale vernier 3, then positioning vernier 6 is moved up and is close to main scale vernier 3, and is tightened Position the lock screw 7 on vernier 6.Then, the lock screw 7 on main scale vernier 3 is unclamped, main scale vernier 3 is moved up, makes to lead The height of ruler vernier 3 is greater than rail height, and reference seat 1 is adsorbed on tested rail and is measured perpendicular to rail length direction at this time and is broken Rail bottom at face, and moving reference seat 1 are bonded positioning vernier measuring claw 601 with rail head of rail.Finally, putting down main scale vernier 3 It is contacted with positioning vernier 6, while adjusting the position of auxiliary scale vernier 5, connect auxiliary scale vernier measuring claw 501 with tested rail head of rail Touching, the reading of auxiliary scale 4 is the rail head width of measured position at this time.
As shown in figure 3, the lock screw 7 on main scale vernier 3 is unclamped after being measured rail head width in a manner described, It is lifted up main scale vernier 3, and mobile auxiliary scale vernier 5,501 lower end surface of auxiliary scale vernier measuring claw is made to be in tested rail profile most Above high point, the lock screw on auxiliary scale vernier 5 is locked at this time.Then, main scale vernier 3, auxiliary scale vernier measuring claw are fallen downwards 501 lower end surfaces are in tested rail profile highest point and are exactly in contact with, and the reading of main scale 2 is that the section rail is high at this time.
As needed, the left end of above-mentioned main scale vernier 3 and reference seat 1 can separately design main scale vernier measuring claw 301 and base Quasi- seat measuring claw 302 makes measuring scale of the present invention be provided simultaneously with the measurement function of aperture, Kong Zhongxin away from rail bottom height.Above-mentioned main scale Vernier measuring claw 301 is equal with 302 Design of length of reference seat measuring claw, is 70mm;Main scale vernier measuring claw 301 and reference seat 302 outside end of measuring claw is designed as the identical horizontal plane of thickness, has opposite interior measuring surface and reversed external pelivimetry face; Wherein measuring surface is coplanar with the datum level of reference seat in reference seat measuring claw 302;And above-mentioned 501 bottom surface of auxiliary scale vernier measuring claw, Position the measurement that measuring surface lower end surface in 601 bottom surface of vernier measuring claw and main scale vernier measuring claw 301 can simultaneously with reference seat 1 Datum level co-planar contacts, the reading of main scale 2 is 0mm at this time.
When measuring aperture, positioning vernier 6 is moved on into bottom, with reference seat measuring claw 302 and main scale vernier measuring claw 301 External pelivimetry face paste lean on hole inner wall relative position, the reading of main scale 2 adds two measuring claw thickness, as bore dia at this time.
When the height of center distance between holes rail bottom, when carrying out hole center away from rail bottom elevation carrection, by reference seat measuring claw 302 and 301 length direction of main scale vernier measuring claw it is parallel with axially bored line and in same vertical plane, by reference seat measuring claw 302 Interior measuring surface reclines rail bottom face, and mobile main scale vernier 3 makes the external pelivimetry face of main scale vernier measuring claw 301 withstand hole upper end inner wall, The reading of main scale 2 subtracts pore radius plus a measuring claw thickness again at this time, and as hole center is away from rail bottom height.
Contact position is inlayed also between auxiliary scale vernier measuring claw 501 and positioning vernier measuring claw 601 and rail in sheet of the present invention Embedding hard alloy blocks, including 501 lower left corner of auxiliary scale vernier measuring claw, and positioning 601 lower right corner of vernier measuring claw, prevent from measuring When the position that is contacted with tested rail be worn, improve the service life of measurer.

Claims (2)

1. a kind of rail variable cross-section dimensional measurement ruler, it is characterised in that: including reference seat, main scale, main scale vernier, auxiliary scale, auxiliary scale Vernier and positioning vernier;
The reference seat is bar shaped plate structure, and top surface is horizontal plane, as measurement datum;Main scale bottom end and reference seat are solid It is fixed;Socket from top to bottom can be along the main scale vernier and positioning vernier that main scale slides up and down on main scale;
It is equipped with positioning vernier measuring claw on the right side of above-mentioned positioning vernier, positions the measurement datum of vernier measuring claw bottom surface and reference seat In parallel, right side is vertical, as the first measuring surface;It is connected on the right side of main scale vernier with auxiliary scale left end;The benchmark of auxiliary scale and reference seat Face is parallel;Being socketed in auxiliary scale can be along the auxiliary scale vernier that auxiliary scale horizontally slips;
Auxiliary scale vernier measuring claw is equipped with below auxiliary scale vernier, auxiliary scale vernier measuring claw left side is vertical, and lower end surface is horizontal, makees respectively For the second measuring surface and third measuring surface;
When positioning vernier and main scale vernier contacts, positioning vernier measuring claw bottom surface is coplanar with auxiliary scale vernier measuring claw bottom surface;This If when positioning vernier measuring claw right side be bonded with auxiliary scale vernier measuring claw left side, auxiliary scale reads as 0mm;
The left end of above-mentioned main scale vernier and reference seat can separately design main scale vernier measuring claw and reference seat measuring claw;Main scale vernier Measuring claw is equal with reference seat measuring claw Design of length, and main scale vernier measuring claw and reference seat measuring claw outside end are designed as thickness Identical horizontal plane is spent, there is opposite interior measuring surface and reversed external pelivimetry face;Wherein measuring surface in reference seat measuring claw It is coplanar with the datum level of reference seat;And above-mentioned auxiliary scale vernier measuring claw bottom surface, positioning vernier measuring claw bottom surface and main scale vernier The measurement datum co-planar contacts that measuring surface lower end surface can simultaneously with reference seat in measuring claw, main scale reading is 0mm at this time.
2. a kind of rail variable cross-section dimensional measurement ruler as described in claim 1, it is characterised in that: measurement method are as follows:
A, when present invention measurement rail variable cross-section rail head width, main scale vernier is moved first, and making its reading is gauge line height, so The lock-screw on main scale vernier is tightened afterwards, then positioning vernier is moved up and is close to main scale vernier, and screwed in place vernier On lock screw;Then, the lock screw on main scale vernier is unclamped, main scale vernier is moved up, makes the height of main scale vernier Greater than rail height, reference seat is adsorbed on the rail bottom at tested rail Measure section perpendicular to rail length direction at this time, and Moving reference seat is bonded positioning vernier measuring claw with rail head of rail;It contacts, locks with positioning vernier finally, putting down main scale vernier Lock screw on tight main scale adjusts the position of auxiliary scale vernier simultaneously, contacts auxiliary scale vernier measuring claw with tested rail head of rail, Auxiliary scale reading is the rail head width of measured position at this time;
After being measured rail head width in a manner described, the lock screw on main scale vernier is unclamped, main scale vernier is lifted up, And mobile auxiliary scale vernier, it is in auxiliary scale vernier measuring claw lower end surface above tested rail profile highest point, locks auxiliary scale at this time Lock screw on vernier;Then, main scale vernier is fallen downwards, and auxiliary scale vernier measuring claw lower end surface is in tested rail profile most High point is exactly in contact with, and main scale reading is that the section rail is high at this time;
When measuring aperture, positioning vernier is moved on into bottom, with the external pelivimetry face of reference seat measuring claw and main scale vernier measuring claw Recline hole inner wall relative position, and main scale reading adds two measuring claw thickness, as bore dia at this time.
When the height of center distance between holes rail bottom, when carrying out hole center away from rail bottom elevation carrection, by reference seat measuring claw and master Ruler vernier measuring claw length direction is parallel with axially bored line and in same vertical plane, and measuring surface in reference seat measuring claw is reclined rail Bottom surface, mobile main scale vernier, makes the external pelivimetry face of main scale vernier measuring claw withstand hole upper end inner wall, and main scale reading adds one at this time A measuring claw thickness subtracts pore radius again, and as hole center is away from rail bottom height.
CN201910152395.XA 2019-02-28 2019-02-28 Steel rail variable cross-section size measuring scale Active CN109737847B (en)

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Cited By (12)

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CN110530228A (en) * 2019-10-11 2019-12-03 中国化工集团曙光橡胶工业研究设计院有限公司 An aviation tire shoulder size measuring caliper and its measuring method
CN111721177A (en) * 2020-06-29 2020-09-29 中国铁建重工集团股份有限公司 Measuring ruler and turnout measuring method
CN112344820A (en) * 2020-10-28 2021-02-09 上海外高桥造船有限公司 Outfitting pipe fitting measuring caliper and caliper using method thereof
CN112665475A (en) * 2020-12-09 2021-04-16 中国铁建重工集团股份有限公司道岔分公司 Foldable multifunctional measuring scale for turnout
CN113124761A (en) * 2021-03-02 2021-07-16 中铁七局集团第三工程有限公司 Grating type metro tunnel segment staggering measuring scale
CN113188399A (en) * 2021-05-06 2021-07-30 中铁宝桥集团有限公司 Universal detection ruler for spacer iron
CN113280712A (en) * 2021-06-30 2021-08-20 中国航发动力股份有限公司 Tool for accurately measuring chord length of blade and using method
CN113405503A (en) * 2021-07-26 2021-09-17 格力电器(武汉)有限公司 Multifunctional measuring instrument
CN114322697A (en) * 2021-12-17 2022-04-12 贵州凯星液力传动机械有限公司 Method for accurately measuring opening size of deep cavity groove in circumferential direction of cylinder
CN115143863A (en) * 2022-07-29 2022-10-04 山东钢铁股份有限公司 A kind of profile steel leg thickness measuring device and measuring method
CN115247992A (en) * 2022-06-30 2022-10-28 贵州龙飞航空附件有限公司 A kind of measuring device and measuring method for aircraft tire compression
CN116294880A (en) * 2022-09-08 2023-06-23 中国舰船研究设计中心 Assembly Calibration Ruler

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CN110530228A (en) * 2019-10-11 2019-12-03 中国化工集团曙光橡胶工业研究设计院有限公司 An aviation tire shoulder size measuring caliper and its measuring method
CN111721177A (en) * 2020-06-29 2020-09-29 中国铁建重工集团股份有限公司 Measuring ruler and turnout measuring method
CN112344820A (en) * 2020-10-28 2021-02-09 上海外高桥造船有限公司 Outfitting pipe fitting measuring caliper and caliper using method thereof
CN112665475B (en) * 2020-12-09 2022-04-22 中国铁建重工集团股份有限公司道岔分公司 Foldable multifunctional measuring scale for turnout
CN112665475A (en) * 2020-12-09 2021-04-16 中国铁建重工集团股份有限公司道岔分公司 Foldable multifunctional measuring scale for turnout
CN113124761A (en) * 2021-03-02 2021-07-16 中铁七局集团第三工程有限公司 Grating type metro tunnel segment staggering measuring scale
CN113124761B (en) * 2021-03-02 2022-11-22 中铁七局集团第三工程有限公司 Grating type metro tunnel segment staggering measuring scale
CN113188399A (en) * 2021-05-06 2021-07-30 中铁宝桥集团有限公司 Universal detection ruler for spacer iron
CN113280712A (en) * 2021-06-30 2021-08-20 中国航发动力股份有限公司 Tool for accurately measuring chord length of blade and using method
CN113405503A (en) * 2021-07-26 2021-09-17 格力电器(武汉)有限公司 Multifunctional measuring instrument
CN114322697A (en) * 2021-12-17 2022-04-12 贵州凯星液力传动机械有限公司 Method for accurately measuring opening size of deep cavity groove in circumferential direction of cylinder
CN115247992A (en) * 2022-06-30 2022-10-28 贵州龙飞航空附件有限公司 A kind of measuring device and measuring method for aircraft tire compression
CN115143863A (en) * 2022-07-29 2022-10-04 山东钢铁股份有限公司 A kind of profile steel leg thickness measuring device and measuring method
CN116294880A (en) * 2022-09-08 2023-06-23 中国舰船研究设计中心 Assembly Calibration Ruler

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