CN109238838A - A kind of rotary bending fatigue test fixture and method - Google Patents
A kind of rotary bending fatigue test fixture and method Download PDFInfo
- Publication number
- CN109238838A CN109238838A CN201811066708.1A CN201811066708A CN109238838A CN 109238838 A CN109238838 A CN 109238838A CN 201811066708 A CN201811066708 A CN 201811066708A CN 109238838 A CN109238838 A CN 109238838A
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- China
- Prior art keywords
- housing
- cover
- bearing
- bearing holder
- bending fatigue
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
- G01N3/04—Chucks
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/20—Investigating strength properties of solid materials by application of mechanical stress by applying steady bending forces
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/003—Generation of the force
- G01N2203/0032—Generation of the force using mechanical means
- G01N2203/0033—Weight
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0058—Kind of property studied
- G01N2203/006—Crack, flaws, fracture or rupture
- G01N2203/0067—Fracture or rupture
Abstract
The invention discloses a kind of rotary bending fatigue test fixture and methods, test fixture includes coupling band, locating shaft, bearing and bearing holder (housing, cover), bearing is mounted in bearing holder (housing, cover), coupling band one end is fixedly mounted in the inner ring of bearing, the other end is equipped with the mounting hole of test sample one end for connection, the test sample other end is made rotating motion by lathe driving, locating shaft one end is mounted on the tail end of lathe, the other end, which is equipped with, to be connected with bearing holder (housing, cover) by the cooperation of sliding slot sliding block, bearing holder (housing, cover) is equipped with the load device applied to it along sliding slot glide direction load, after test sample is installed, bending load is applied to bearing holder (housing, cover) by load device, starting lathe drives test sample to make rotating motion, until sample fracture or sample reach preset number of revolutions and stop lathe, complete test, the configuration of the present invention is simple, it can use Some lathes can carry out rotary bending fatigue test to material without customizing complicated driving equipment.
Description
Technical field
The invention belongs to material properties test fields, are related to a kind of fatigue of materials Performance Testing Technology, and in particular to a kind of
Rotary bending fatigue test fixture and method, can be in test material fatigue life and fatigue strength under room temperature environment.
Background technique
Fatigue test is a kind of test equipment of test material fatigue strength and fatigue life.National standard GB/T4337-2008
Have in " Metal Material Fatigue tests rotoflector method " and sample is dressed up into cantilever, carries out single-point or two point reinforcing；Or dress up cross
Beam carries out the mode of four point reinforcings.It is domestic main at present it is to be applied be 4 points of reinforcings and the rotoflector that works at high temperature is tired
There is the restriction for the factors such as excessively high to sample requirement on machining accuracy, counterweight loading capacity is excessive in labor testing machine, so that higher cost,
It is difficult to promote in the market.Since in the actual use of most material, the fatigue rupture of material is at normal temperature in fact
It carries out, many major accidents caused, causes the great attention of engineering circles, but carry out room temperature rotary bending fatigue test
The shortage of equipment, so that present case is difficult to meet the market demand.
Summary of the invention
This fixture is directed to the demand of above-mentioned existing situation, according to the requirement of national standard, devises that a kind of structure is simple, and load is quasi-
Really, room temperature cantilever-rotating repeated bend test fixture applied widely and self-protection.
This fixture technical scheme applied to solve the technical problem is:
A kind of rotary bending fatigue test fixture, it is characterised in that: including coupling band, locating shaft, bearing and bearing holder (housing, cover), institute
It states bearing to be mounted in bearing holder (housing, cover), coupling band one end is fixedly mounted in the inner ring of bearing, and the other end is equipped with the survey for connection
It has a try the mounting hole of sample one end, the test sample other end is made rotating motion by rotation device driving, the locating shaft one
End is mounted in support device, and the other end is equipped with the sliding slot vertical with the axis of bearing holder (housing, cover), and the bearing holder (housing, cover) end is equipped with installation
Sliding block in sliding slot, the bearing holder (housing, cover) are equipped with the load device applied to it along sliding slot glide direction load.
As an improvement, the rotary motion driving device is lathe, test sample is fixed by the scroll chuck of lathe, fixed
Position axis is supported by the tailstock of lathe.
As an improvement, the load device is counterweight device, annular groove, the counterweight device are equipped with outside the bearing holder (housing, cover)
It is hung on the annular groove of bearing holder (housing, cover) by attachment device, the sliding slot on corresponding locating shaft is the setting of plummet direction, and lathe is
Horizontal machine tool.
As an improvement, the counterweight device is scale pan, the counterweight of different loads can be added as needed on scale pan.
As an improvement, the attachment device is soft iron wire or wirerope.
As an improvement, the sliding slot on the locating shaft is dovetail groove, the sliding block of corresponding bearing holder (housing, cover) end is dovetail slide block.
As an improvement, preset clearance between the dovetail slide block and the slot bottom of dovetail groove.
As an improvement, the bearing is mounted in bearing holder (housing, cover) by interference fit, the coupling band passes through interference fit peace
In the inner ring of bearing, the mounting hole side of coupling band is equipped with the threaded hole for fixing test sample.
As an improvement, the end of the bearing holder (housing, cover) is equipped with the removal hole of bearing easy to disassemble.
A kind of rotary bending fatigue test test method, which comprises the following steps:
Step 1: coupling band is mounted in the inner ring of bearing by interference fit, bearing interference fit is mounted on axis
In bearing sleeve, bearing holder (housing, cover) is mounted in the sliding slot of locating shaft, locating shaft is mounted on the tailstock of horizontal machine tool to just；
Step 2: test sample one end is bolted in coupling band, the other end is mounted on the three of horizontal machine tool
On dog chuck；
Step 3: applying the load in plummet direction to bearing holder (housing, cover) by counterweight；
Step 4: starting horizontal machine tool, drives test sample rotary motion under bending load, until test sample is disconnected
It splits, or reaches scheduled rotating circulating number, stop horizontal machine tool, complete test.
Beneficial effects of the present invention:
This rotary bending fatigue test fixture can be carried out under normal temperature condition on numerically-controlled machine tool for metal material with clamping
Rotary bending fatigue test, test fatigue strength, fatigue life.Its counterweight innovated is loaded directly into design so that the fixture knot
Structure is simple, high reliablity, easy to setup；The sliding block of bearing holder (housing, cover) and locating shaft, sliding slot cooperation positioning, avoid tired in installation process
Labor sample misaligns caused error, it is ensured that neutrality.The screw fastening means of coupling band and sampling, can clamp
The sample of sizes specification, through overtesting practice examining, the stable non-loosening situation always in rotary course.It is stayed after bearing holder (housing, cover)
There is through-hole, if bearing damage after test of many times, quick detachable repair.From machine tool three-jaw chuck to sample, coupling band, bearing, bearing
The cooperation of set, locating shaft, lathe, structure is simple, and load is convenient.
Detailed description of the invention
Fig. 1 is that test fixture of the invention carries out schematic diagram of main cross-sectional structure when rotary bending fatigue test；
Fig. 2 is test fixture partial schematic diagram in this Fig. 1；
Fig. 3 is bearing holder (housing, cover) schematic top plan view；
Fig. 4 is locating shaft schematic top plan view；
Fig. 5 is coupling band schematic top plan view；
Fig. 6 is rotary bending fatigue test fixture carry load device schematic diagram of the present invention.
1- test sample, 2- coupling band, 3- threaded hole, 4- bearing, 5- bearing holder (housing, cover), 6- annular groove, 7- locating shaft, 8- disassembly
Hole, 9- sliding slot, 10- sliding block, 11- counterweight, 12- iron wire, 13- scroll chuck.
Specific embodiment
Embodiment: the present invention is illustrated for below using horizontal machine tool as rotary motion driving device.
As shown in Figure 1, a kind of rotary bending fatigue test fixture of the present invention, including coupling band 2, bearing 4,5 and of bearing holder (housing, cover)
Locating shaft 7.Connection relationship are as follows: coupling band 2 is mounted in the inner ring of bearing 4 by interference fit, bearing 4 is interference fitted and is pacified
In bearing holder (housing, cover) 5, locating shaft 7 is equipped with the sliding slot 9 in plummet direction, and more preferably the sliding slot 9 can be dovetail groove, bearing holder (housing, cover) 5
End is equipped with the sliding block 10 being mounted in 7 upper hopper chute 9 of locating shaft, and the corresponding sliding block 10 is dovetail slide block, 7 rear portion of locating shaft
For the diminishing cylindrical body in section, gradient 1:20, convenient for when locating shaft 7 is mounted on horizontal machine tool tailstock to just,
It is to be noted that locating shaft 7 can also pass through other support devices, such as bracket in the embodiment of the present invention；The axis
The annular groove 6 for loaded load is equipped in the middle part of bearing sleeve 5, scale pan is hung on annular groove 6 by iron wire 12, is bearing holder (housing, cover) 5
Apply the load in plummet direction, passes through the plus-minus of counterweight 11 on the scale pan, to adjust the size of load；2 one end of coupling band
It is fixedly mounted in the inner ring of bearing 4, the other end is equipped with the mounting hole of the test sample 1 for connection, the mounting hole of coupling band 2
Side is equipped with the threaded hole 3 for locking test sample 1, and 1 one end of test sample is mounted on the scroll chuck 13 of horizontal machine tool,
Fixed by scroll chuck 13, the other end is mounted in mounting hole, is fixed after passing through threaded hole 3 by screw.
Working principle: first according to the specific size size of rotary bending fatigue sample, go out to load counterweight by theoretical calculation
The corresponding stress relation of weight.The counterweight of corresponding weight is hung on scale pan, and is hung on bearing holder (housing, cover) 5 by iron wire 12
On annular groove 6, make test sample 1 by moment of flexure.Electric machine of numerically controlled machine is opened, time and revolving speed are recorded, scroll chuck 13 rotates
Test sample 1 is driven to rotate bending deformation.In loading procedure, test sample 1 is broken, and is closed motor, is removed counterweight, is tried
End is tested, test sample 1 is removed.If test sample 1 reaches formulation, cycle-index does not generate crack also, closes power supply, removes
Test sample 1 is removed in counterweight, off-test.
As a kind of specific embodiment, 6004 deep groove ball bearings, the annular groove 6 on bearing holder (housing, cover) 5 is can be used in bearing 4 of the present invention
Section be the arc-shaped of Φ 4.7mm, for the ease of dismounting bearing 4, opposite one end is set there are two Φ 6mm on bearing holder (housing, cover) 5
Symmetrical removal hole 8.
It is to be noted that the sliding slot 9 on locating shaft 7 is plummet direction, and scale pan passes through iron wire in the embodiment of the present invention
12 hang over and apply the reversed load of plummet on bearing holder (housing, cover) 5, naturally it is also possible to should not scale pan, directly use iron wire 12 by required counterweight
It strings together and hangs on the annular groove 6 of bearing holder (housing, cover) 5 or even counterweight or scale pan can also be connected to bearing holder (housing, cover) by other means
On 5, if guarantee to apply plummet direction force, such as wirerope hang or link up with it is connected can also.
When in order to avoid the fracture of test sample 1, bearing holder (housing, cover) 5, coupling band 2 and counterweight are fallen together, can be in bearing holder (housing, cover) 5
0.1mm is set between the slot bottom of the sliding slot 9 of sliding block 10 and locating shaft 7 and acts on gap, in this way, when test sample 1 is broken, in counterweight
Under 5 Gravitative Loads of bearing holder (housing, cover), 5 run-off the straight of bearing holder (housing, cover), sliding block 10 thereon will be stuck in sliding slot 9, not fallen out, can be with
Effectively avoid in case above-mentioned apparatus hit ground be damaged.
As a kind of more specific embodiment, consider that bearing holder (housing, cover) 5 can be produced relative sliding relative to locating shaft 7, and
When test sample 1 is broken, bearing holder (housing, cover) 5 is not fallen out on the ground, as shown in Fig. 2, can set dovetail groove, dovetail for sliding slot 9
The groove depth of slot is 5mm or so, and the sliding block 10 on corresponding bearing holder (housing, cover) 5 is dovetail slide block.
It should be pointed out that load device of the present invention is applied by the way of Weight gravity effect, naturally it is also possible to be to appoint
What can apply the load with its axially vertical direction to bearing holder (housing, cover) 5, at this point, load, which applies direction, is not limited to plummet direction, as long as
Be it is identical as 9 direction of sliding slot on locating shaft 7, it is same to drive what test sample 1 rotated to be not limited to horizontal machine tool, can also
To be vertical machine, it might even be possible to be electric drill or other motors as driving.
Claims (10)
1. a kind of rotary bending fatigue test fixture, it is characterised in that: described including coupling band, locating shaft, bearing and bearing holder (housing, cover)
Bearing is mounted in bearing holder (housing, cover), and coupling band one end is fixedly mounted in the inner ring of bearing, and the other end is equipped with the test for connection
The mounting hole of sample one end, the test sample other end are made rotating motion by rotation device driving, described locating shaft one end
It is mounted in support device, the other end is equipped with the sliding slot vertical with the axis of bearing holder (housing, cover), and the bearing holder (housing, cover) end is equipped with and is mounted on
Sliding block in sliding slot, the bearing holder (housing, cover) are equipped with the load device applied to it along sliding slot glide direction load.
2. a kind of rotary bending fatigue test fixture as described in claim 1, it is characterised in that: the rotary motion driving device
For lathe, test sample is fixed by the scroll chuck of lathe, and locating shaft is supported by the tailstock of lathe.
3. a kind of rotary bending fatigue test fixture as claimed in claim 2, it is characterised in that: the load device is counterweight dress
It sets, annular groove is equipped with outside the bearing holder (housing, cover), the counterweight device is hung on the annular groove of bearing holder (housing, cover) by attachment device, right
The sliding slot on locating shaft answered is the setting of plummet direction, and lathe is horizontal machine tool.
4. a kind of rotary bending fatigue test fixture as claimed in claim 3, it is characterised in that: the counterweight device is counterweight
The counterweight of different loads can be added as needed on scale pan for disk.
5. a kind of rotary bending fatigue test fixture as claimed in claim 3, it is characterised in that: the attachment device is soft iron
Silk or wirerope.
6. a kind of rotary bending fatigue test fixture as claimed in claim 2, it is characterised in that: the sliding slot on the locating shaft is
Dovetail groove, the sliding block of corresponding bearing holder (housing, cover) end are dovetail slide block.
7. a kind of rotary bending fatigue test fixture as claimed in claim 6, it is characterised in that: the dovetail slide block and dovetail groove
Slot bottom between preset clearance.
8. a kind of rotary bending fatigue test fixture as described in claim 1 to 7 any one, it is characterised in that: the bearing
It is mounted in bearing holder (housing, cover) by interference fit, the coupling band is mounted in the inner ring of bearing by interference fit, coupling band
Mounting hole side is equipped with the threaded hole for fixing test sample.
9. a kind of rotary bending fatigue test fixture as described in claim 1 to 7 any one, it is characterised in that: the bearing
The end of set is equipped with the removal hole of bearing easy to disassemble.
10. a kind of rotary bending fatigue test test method, which comprises the following steps:
Step 1: coupling band is mounted in the inner ring of bearing by interference fit, bearing interference fit is mounted on bearing holder (housing, cover)
It is interior, bearing holder (housing, cover) is mounted in the sliding slot of locating shaft, locating shaft is mounted on the tailstock of horizontal machine tool to just；
Step 2: test sample one end is bolted in coupling band, the other end is mounted on the three-jaw card of horizontal machine tool
On disk；
Step 3: applying the load in plummet direction to bearing holder (housing, cover) by counterweight；
Step 4: starting horizontal machine tool, drives test sample rotary motion under bending load, until test sample is broken or reaches
To scheduled rotating circulating number, stop horizontal machine tool, completes test.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811066708.1A CN109238838B (en) | 2018-09-13 | 2018-09-13 | Rotary bending fatigue test fixture and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811066708.1A CN109238838B (en) | 2018-09-13 | 2018-09-13 | Rotary bending fatigue test fixture and method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109238838A true CN109238838A (en) | 2019-01-18 |
| CN109238838B CN109238838B (en) | 2021-02-19 |
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ID=65058005
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811066708.1A Active CN109238838B (en) | 2018-09-13 | 2018-09-13 | Rotary bending fatigue test fixture and method |
Country Status (1)
| Country | Link |
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| CN (1) | CN109238838B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114813410A (en) * | 2022-07-01 | 2022-07-29 | 沈阳美茵联合检测有限公司 | S/N curve fitting test method for rotary bending fatigue of aviation hydraulic conduit |
| CN116878878A (en) * | 2023-09-05 | 2023-10-13 | 万向钱潮股份公司 | Bearing test reinforcing and fastening device |
| CN117405585A (en) * | 2023-12-14 | 2024-01-16 | 天津六0九电缆有限公司 | Test method and equipment for rapidly judging loosening of wire insulation film |
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| DE29908676U1 (en) * | 1999-05-17 | 1999-12-02 | Rms Regelungs Und Mestechnik D | Circulation bending testing machine |
| KR101277930B1 (en) * | 2011-09-28 | 2013-06-27 | 현대제철 주식회사 | Rotary bending fatigue tester |
| CN103203660A (en) * | 2013-05-07 | 2013-07-17 | 无锡华联科技集团有限公司 | Steel plate end face milling and centring device |
| CN204514729U (en) * | 2015-04-20 | 2015-07-29 | 燕山大学 | Liner testing machine |
| CN105716851A (en) * | 2016-03-30 | 2016-06-29 | 华南理工大学 | Rotating bending fatigue testing machine for valves |
| CN106290026A (en) * | 2016-09-29 | 2017-01-04 | 华南理工大学 | A kind of rotary bending tester |
| US20180237883A1 (en) * | 2014-11-24 | 2018-08-23 | Japan Casting & Forging Corporation | METHOD FOR PRODUCING JOURNAL PART OF 9 TO 12% Cr STEEL TURBINE ROTOR, AND JOURNAL PART PRODUCED BY THE METHOD |
-
2018
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Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE29908676U1 (en) * | 1999-05-17 | 1999-12-02 | Rms Regelungs Und Mestechnik D | Circulation bending testing machine |
| KR101277930B1 (en) * | 2011-09-28 | 2013-06-27 | 현대제철 주식회사 | Rotary bending fatigue tester |
| CN103203660A (en) * | 2013-05-07 | 2013-07-17 | 无锡华联科技集团有限公司 | Steel plate end face milling and centring device |
| US20180237883A1 (en) * | 2014-11-24 | 2018-08-23 | Japan Casting & Forging Corporation | METHOD FOR PRODUCING JOURNAL PART OF 9 TO 12% Cr STEEL TURBINE ROTOR, AND JOURNAL PART PRODUCED BY THE METHOD |
| CN204514729U (en) * | 2015-04-20 | 2015-07-29 | 燕山大学 | Liner testing machine |
| CN105716851A (en) * | 2016-03-30 | 2016-06-29 | 华南理工大学 | Rotating bending fatigue testing machine for valves |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114813410A (en) * | 2022-07-01 | 2022-07-29 | 沈阳美茵联合检测有限公司 | S/N curve fitting test method for rotary bending fatigue of aviation hydraulic conduit |
| CN116878878A (en) * | 2023-09-05 | 2023-10-13 | 万向钱潮股份公司 | Bearing test reinforcing and fastening device |
| CN116878878B (en) * | 2023-09-05 | 2023-11-14 | 万向钱潮股份公司 | Bearing test reinforcing and fastening device |
| CN117405585A (en) * | 2023-12-14 | 2024-01-16 | 天津六0九电缆有限公司 | Test method and equipment for rapidly judging loosening of wire insulation film |
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| Publication number | Publication date |
|---|---|
| CN109238838B (en) | 2021-02-19 |
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