CN108562486A - Steel rail weld joint material object repeated bend test loads fixture - Google Patents

Steel rail weld joint material object repeated bend test loads fixture Download PDF

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Publication number
CN108562486A
CN108562486A CN201810489661.3A CN201810489661A CN108562486A CN 108562486 A CN108562486 A CN 108562486A CN 201810489661 A CN201810489661 A CN 201810489661A CN 108562486 A CN108562486 A CN 108562486A
Authority
CN
China
Prior art keywords
pressure head
carrier module
material object
steel rail
weld joint
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201810489661.3A
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Chinese (zh)
Inventor
宁雄显
彭辉
陈云霞
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Pangang Group Panzhihua Iron and Steel Research Institute Co Ltd
Original Assignee
Pangang Group Panzhihua Iron and Steel Research Institute Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Pangang Group Panzhihua Iron and Steel Research Institute Co Ltd filed Critical Pangang Group Panzhihua Iron and Steel Research Institute Co Ltd
Priority to CN201810489661.3A priority Critical patent/CN108562486A/en
Publication of CN108562486A publication Critical patent/CN108562486A/en
Pending legal-status Critical Current

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Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/02Details
    • G01N3/04Chucks
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/02Details not specific for a particular testing method
    • G01N2203/04Chucks, fixtures, jaws, holders or anvils
    • G01N2203/0435Chucks, fixtures, jaws, holders or anvils modifying the type of the force applied, e.g. the chuck transforms a compressive machine for applying a bending test

Abstract

The present invention relates to a kind of steel rail weld joint material object repeated bend test loads fixtures, belong to the detection device technical field of rail material object welding point and metal component fatigue performance.The present invention includes the ring flange being connect with testing machine force snesor, ring flange is fixedly connected by screw rod with carrier module, carrier module is provided with the connecting screw hole A for mounting flange in its top surface, carrier module connects pressure head module in bottom surface by screw rod, and pressure head module is single reinforcing pressure head block or double pressure head components;Carrier module is provided with the connecting screw hole B of the single reinforcing pressure head block of connection in its bottom surface while being provided with the connecting screw hole C of the double pressure head components of connection.The present invention can more easily be carried out at the same time three point bending test and four-point bending test, be conducive to the perfect of steel rail welding.

Description

Steel rail weld joint material object repeated bend test loads fixture
Technical field
The present invention relates to a kind of steel rail weld joint material object repeated bend test loads fixtures, belong to rail material object and connect The detection device technical field of head and metal component fatigue performance.
Background technology
Chinese 1632 series standards of iron mark TB/T define the detection method of rail material object fatigue properties of welded joints and right The requirement of test fixture, BS EN14587-2 and Australian steel rail weld joint standard AS 1085.20 weld rail material object Connector also has corresponding requirement.National and foreign standards all provide that rail head of rail is upward, and load pressure head applies rail head downward pressure- Press fatigue load.There is following main difference both at home and abroad:
1,1632 standards of TB/T use three-point bending fixture, fixture pressure head face position while welding.
2, BS EN14587-2 and 1085.20 standards of AS use four-point bending fixture, two load pressure head spacing to be not less than 150mm+ flange of rail weld widths, weld seam is among two pressure heads.
3, the load pressure head wheel tread curve radius in 1632 standards of TB/T is 420 ± 5mm;BS EN14587-2 and AS Load pressure head sweep in 1085.20 standards is 40mm~60mm.
In the prior art, when rail material object fatigue properties of welded joints is tested, typically in three-point bending fixture and four Point bending fixture in select it is a kind of implemented, be unfavorable for the perfect of steel rail welding.If being carried out at the same time three-point bending examination It tests and four-point bending test, then needs two sets of testing equipments, equipment investment is larger, economically uneconomical.
In addition, when rail material object fatigue properties of welded joints is tested, the fatigue load of application is up to hundreds of thousand Ns, commonly The tired fixture of scale is difficult to meet safe handling requirement.
Invention content
The technical problem to be solved by the present invention is to:A kind of steel rail weld joint material object repeated bend test loading clamp is provided Tool, can more easily be carried out at the same time three point bending test and four-point bending test, be conducive to the perfect of steel rail welding.
The technical solution adopted in the present invention is to solve above-mentioned technical problem:Steel rail weld joint material object flexural fatigue is tried Loads fixture to be tested, includes the ring flange being connect with testing machine force snesor, ring flange is fixedly connected by screw rod with carrier module, Carrier module is provided with the connecting screw hole A for mounting flange in its top surface, and carrier module is connected in bottom surface by screw rod Pressure head module is connect, pressure head module is single reinforcing pressure head block or double pressure head components;Carrier module is provided with connection in its bottom surface The connecting screw hole B of single reinforcing pressure head block while the connecting screw hole C for being provided with the double pressure head components of connection.
The further improved preferred embodiment of the present invention is:Carrier module is overall processing structural member, the top of carrier module Bottom surface for cylinder, carrier module is rectangular pressure head module mounting plane.
The further improved preferred embodiment of the present invention is:Connecting screw hole A be along the circumferential direction be distributed it is multiple.
The further improved preferred embodiment of the present invention is:Connecting screw hole B is symmetrical arranged along load axis.
The further improved preferred embodiment of the present invention is:Double pressure head components include two pieces pressure head set, and pressure head set is along load Axisymmetrical is arranged, and pressure head set top has the screw rod via for connecting carrier module, and pressure head set bottom, which has, to be laterally arranged Pressure head mounting groove, cylindrical crimp is installed, cylindrical crimp has a part of arc surface relative to pressure in pressure head mounting groove Head mounting groove evagination setting.
The further improved preferred embodiment of the present invention is:Each pressure head set is provided with four screw rod mistakes of rectangular distribution The distributing position in hole, connecting screw hole C is corresponding with screw rod via.
The further improved preferred embodiment of the present invention is:Carrier module is provided in its top surface center and is used for and method The positioning rim of the mouth of blue disk engaging positioning or positioning convex platform.
The further improved preferred embodiment of the present invention is:Hole for hoist is provided on carrier module.
The beneficial effects of the invention are as follows:Clamp assembly uses the carrier module and pressure head Analysis of Nested Design of high rigidity overall processing, The accurate firm reinforcing part for being connected to testing machine of the component, coordinates two cylindrical crimps freely replaced or has fixed tread The single reinforcing pressure head block of sweep is realized apply or three-point bending fatigue load at 4 points to rail material object welding point respectively Lotus can more fully detect rail material object welding point and metal component fatigue performance, be conducive to rail welding Technique it is perfect.In addition, the fatigue load that the fixture can apply is up to hundreds of thousand Ns, fixture rigidity is sufficiently large, is up to more than 1000 The using effect of hour, which demonstrates the fixture, does not have security risk.The present invention is simple with processing, structure is firm, can carry fatigue The big feature of load.
Description of the drawings
Fig. 1 is the implementation schematic diagram that the present invention applies four-point bending fatigue load;
Fig. 2 is the implementation schematic diagram that the present invention applies three-point bending fatigue load;
Fig. 3 is the front view of the carrier module in the present invention;
Fig. 4 is the vertical view of the carrier module in the present invention;
Fig. 5 is the side view of the carrier module in the present invention;
Fig. 6 is the front view of the pressure head set in the present invention;
Fig. 7 is the vertical view of the pressure head set in the present invention;
Fig. 8 is the side view of the pressure head set in the present invention;
It is marked in figure:1- ring flanges, 2- carrier modules, 3- connecting screw hole A, 4- connecting screw hole B, 5- connecting screw holes C, 6- are mono- A reinforcing pressure head block, 7- pressure head sets, 8- screw rod vias, 9- pressure head mounting grooves, 10- cylindrical crimps, 11- position rim of the mouth, and 12- is hung Fill hole, 13- support bases.
Specific implementation mode
The invention will be further described with reference to the accompanying drawings and embodiments.
As shown in Figures 1 to 8, the present invention includes the ring flange 1 being connect with testing machine force snesor, and ring flange 1 passes through spiral shell Bar is fixedly connected with carrier module 2, and carrier module 2 is provided with the connecting screw hole A3 for mounting flange 1 in its top surface, holds It carries module 2 and pressure head module is connected by screw rod in bottom surface, pressure head module is single reinforcing pressure head block 6 or double pressure head components;It holds Module 2 is carried its bottom surface is provided with the connecting screw hole B4 of the single reinforcing pressure head block 6 of connection while being provided with the double press head groups of connection The connecting screw hole C5 of part.
So that overall structure safety and reliability, carrier module 2 are overall processing structural member, the top of carrier module 2 is The bottom surface of cylinder, carrier module 2 is rectangular pressure head module mounting plane.
It is easy to connect to make, structure safety and reliability, connecting screw hole A3 be along the circumferential direction be distributed it is multiple.
Easy to connect to make, structure safety and reliability, connecting screw hole B4 is symmetrical arranged along load axis.
Easy to connect to make, structure safety and reliability, double pressure head components include two pieces pressure head set 7, and pressure head set 7 is along adding Axisymmetrical setting is carried, 7 top of pressure head set has the screw rod via 8 for connecting carrier module 2, and pressure head, which covers 7 bottoms, has cross To the pressure head mounting groove 9 of setting, cylindrical crimp 10 is installed in pressure head mounting groove 9, cylindrical crimp 10 has part circle Cambered surface is arranged relative to 9 evagination of pressure head mounting groove.
Easy to connect to make, structure safety and reliability, each pressure head set 7 is provided with four screw rod mistakes of rectangular distribution The distributing position in hole 8, connecting screw hole C5 is corresponding with screw rod via 8.
It is positioned for convenience of the installation of carrier module 2, carrier module 2 is provided in its top surface center and is used for and flange The positioning rim of the mouth 11 of the engaging positioning of disk 1 or positioning convex platform.
For convenience of lifting, hole for hoist 12 is provided on carrier module 2.
Connecting screw applied in the present invention preferably uses high-strength bolt.
Embodiment:
As shown in Figures 3 to 5, the carrier module 2 in the present invention is that (long) ╳ 270mm be (wide) ╳ 260mm (height) by 470mm Metal overall processing part machined the connecting screw hole A3 of mounting flange 1, the connection spiral shell of the single reinforcing pressure head block 6 of connection thereon Hole B4, the connecting screw hole C5 of the double pressure head components of connection, positioning rim of the mouth 11, lifting screw hole 12 etc..The cylindrical part of carrier module 2 It is fixed on the ring flange 1 being connect with testing machine force snesor by the high-strength bolt of 8 M24, positioning rim of the mouth 11 and connection spiral shell Bar, which ensure that, to be accurately positioned and is reliably connected.
As shown in Figure 6 to 8, the pressure head set 7 in the present invention is 200mm (the long) ╳ 160mm (gold of wide) ╳ 133mm (height) Belong to workpiece, machined screw rod via 8, the pressure head mounting groove 9 of connection carrier module 2 above.When processing pressure head mounting groove 9, A pressure head hole bigger 0.2mm than the diameter of cylindrical crimp 10 can be first processed, then pressure head hole is integrally cut to one part of removal, The vertical distance that cylindrical crimp 10 in the present invention is arranged relative to 9 evagination of pressure head mounting groove is 20mm.Using above-mentioned processing Mode, to ensure that cylindrical crimp 10 passes freely through pressure head mounting groove 9, and it is tired to the application of rail sample by cylindrical crimp 10 Labor load.Two pressure heads set 7 uses the high-strength bolt of 4 M8, is symmetrical with rectangle of the load axis fixed to carrier module 2 respectively In plane, the pressure head pitch of holes after positioning is 220mm, meets load pressure head spacing and is wanted not less than 150mm+ flange of rail weld widths It asks.The design of carrier module 2 and pressure head set 7, has fully considered being accurately positioned and being reliably connected for connecting components in the present invention.
As shown in Figure 1, when the present invention carries out four-point bending test, two cylindrical crimps 10 coordinate two support bases 13, It realizes and four-point bending fatigue load is applied to rail material object welding point.The present invention refers to BS EN14587-2 and AS 1085.20 Provide a kind of steel rail weld joint material object repeated bend test loads fixture, the fatigue load of application is up to hundreds of thousand Ns, profit With the fixture, steel rail welding line and heat affected area are in maximum weighted region, can preferably study rail fatigue properties of welded joints, To effectively help to improve welding procedure.Fixture rigidity is sufficiently large, and the fixture is demonstrated up to the using effect of more than 1000 hours There is no security risk.
As shown in Fig. 2, when the present invention carries out three point bending test, the single wheel tread curve radius for reinforcing pressure head block 6 is 420mm, the connecting screw hole B4 that load axis is symmetrical with by two are fixed on carrier module 2, coordinate two support bases 13 real Three-point bending load now is applied to rail sample.

Claims (8)

1. steel rail weld joint material object repeated bend test loads fixture, it is characterised in that:Including connecting with testing machine force snesor The ring flange (1) connect, ring flange (1) are fixedly connected by screw rod with carrier module (2), and carrier module (2) is set in its top surface It is equipped with the connecting screw hole A (3) for mounting flange (1), carrier module (2) connects pressure head module in bottom surface by screw rod, Pressure head module is single reinforcing pressure head block (6) or double pressure head components;Carrier module (2) is provided with connection in its bottom surface and individually adds The connecting screw hole B (4) of power pressure head block (6) while the connecting screw hole C (5) for being provided with the double pressure head components of connection.
2. steel rail weld joint material object repeated bend test loads fixture as described in claim 1, it is characterised in that:Carry mould Block (2) is overall processing structural member, and the top of carrier module (2) is cylinder, and the bottom surface of carrier module (2) is rectangular pressure Head module mounting plane.
3. steel rail weld joint material object repeated bend test loads fixture as described in claim 1, it is characterised in that:Connect spiral shell Hole A (3) be along the circumferential direction be distributed it is multiple.
4. steel rail weld joint material object repeated bend test loads fixture as described in claim 1, it is characterised in that:Connect spiral shell Hole B (4) is symmetrical arranged along load axis.
5. steel rail weld joint material object repeated bend test loads fixture as described in claim 1, it is characterised in that:Double pressure heads Component includes two pieces pressure head set (7), and pressure head set (7) is symmetrical arranged along load axis, has for connecting at the top of pressure head set (7) The screw rod via (8) of carrier module (2), pressure head set (7) bottom have the pressure head mounting groove (9) being laterally arranged, pressure head mounting groove (9) cylindrical crimp (10) is installed in, cylindrical crimp (10) have a part of arc surface relative to pressure head mounting groove (9) outside Projection is set.
6. steel rail weld joint material object repeated bend test loads fixture as claimed in claim 5, it is characterised in that:Each pressure Headgear (7) is provided with four screw rod vias (8) of rectangular distribution, distributing position and the screw rod via (8) of connecting screw hole C (5) It is corresponding.
7. the steel rail weld joint material object repeated bend test loads fixture as described in any one of claim 1 to 6, special Sign is:Carrier module (2) is provided with the positioning rim of the mouth for engaging positioning with ring flange (1) in its top surface center (11) or positioning convex platform.
8. the steel rail weld joint material object repeated bend test loads fixture as described in any one of claim 1 to 6, special Sign is:Hole for hoist (12) is provided on carrier module (2).
CN201810489661.3A 2018-05-21 2018-05-21 Steel rail weld joint material object repeated bend test loads fixture Pending CN108562486A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201810489661.3A CN108562486A (en) 2018-05-21 2018-05-21 Steel rail weld joint material object repeated bend test loads fixture

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201810489661.3A CN108562486A (en) 2018-05-21 2018-05-21 Steel rail weld joint material object repeated bend test loads fixture

Publications (1)

Publication Number Publication Date
CN108562486A true CN108562486A (en) 2018-09-21

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109507050A (en) * 2019-01-02 2019-03-22 攀钢集团攀枝花钢铁研究院有限公司 Rail joint rail head bias-load-web of the rail fatigue experimental device and test method
CN109632526A (en) * 2019-01-21 2019-04-16 哈尔滨理工大学 A kind of novel three point bending test device
CN110779819A (en) * 2019-10-29 2020-02-11 成都西交轨道交通技术服务有限公司 Steel rail fastener assembling fatigue test device and monitoring system
DE102022118776A1 (en) 2022-07-27 2024-02-01 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Bending test device for sheet metal strips

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109507050A (en) * 2019-01-02 2019-03-22 攀钢集团攀枝花钢铁研究院有限公司 Rail joint rail head bias-load-web of the rail fatigue experimental device and test method
CN109507050B (en) * 2019-01-02 2021-11-02 攀钢集团攀枝花钢铁研究院有限公司 Rail joint head eccentric loading-rail web fatigue test device and method
CN109632526A (en) * 2019-01-21 2019-04-16 哈尔滨理工大学 A kind of novel three point bending test device
CN110779819A (en) * 2019-10-29 2020-02-11 成都西交轨道交通技术服务有限公司 Steel rail fastener assembling fatigue test device and monitoring system
DE102022118776A1 (en) 2022-07-27 2024-02-01 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Bending test device for sheet metal strips

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Application publication date: 20180921

RJ01 Rejection of invention patent application after publication