CN108717023A - The device and method of magnesium alloy plate and belt beaming limit and springback capacity is tested simultaneously - Google Patents
The device and method of magnesium alloy plate and belt beaming limit and springback capacity is tested simultaneously Download PDFInfo
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- CN108717023A CN108717023A CN201810783338.7A CN201810783338A CN108717023A CN 108717023 A CN108717023 A CN 108717023A CN 201810783338 A CN201810783338 A CN 201810783338A CN 108717023 A CN108717023 A CN 108717023A
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- magnesium alloy
- belt
- tension
- alloy plate
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- 229910000861 Mg alloy Inorganic materials 0.000 title claims abstract description 76
- 238000000034 method Methods 0.000 title claims abstract description 17
- 238000004826 seaming Methods 0.000 claims abstract description 44
- 238000012360 testing method Methods 0.000 claims abstract description 37
- 238000013001 point bending Methods 0.000 claims abstract description 26
- 230000005855 radiation Effects 0.000 claims abstract description 20
- 238000010438 heat treatment Methods 0.000 claims abstract description 19
- 238000009413 insulation Methods 0.000 claims abstract description 15
- 238000005452 bending Methods 0.000 claims description 19
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims description 9
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 8
- 239000011888 foil Substances 0.000 claims description 8
- 229910052749 magnesium Inorganic materials 0.000 claims description 8
- 239000011777 magnesium Substances 0.000 claims description 8
- 238000005485 electric heating Methods 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 2
- 230000005611 electricity Effects 0.000 claims 1
- 230000007704 transition Effects 0.000 claims 1
- 238000002474 experimental method Methods 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 6
- 238000010998 test method Methods 0.000 description 6
- 229910045601 alloy Inorganic materials 0.000 description 5
- 239000000956 alloy Substances 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 208000037656 Respiratory Sounds Diseases 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C51/00—Measuring, gauging, indicating, counting, or marking devices specially adapted for use in the production or manipulation of material in accordance with subclasses B21B - B21F
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/44—Sample treatment involving radiation, e.g. heat
-
- 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
-
- 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
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
- G01N3/18—Performing tests at high or low temperatures
-
- 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
- G01N3/40—Investigating hardness or rebound hardness
-
- 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
- G01N2203/0014—Type of force applied
- G01N2203/0016—Tensile or compressive
- G01N2203/0017—Tensile
-
- 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
- G01N2203/0014—Type of force applied
- G01N2203/0023—Bending
-
- 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
- G01N2203/0069—Fatigue, creep, strain-stress relations or elastic constants
- G01N2203/0075—Strain-stress relations or elastic constants
-
- 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
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/022—Environment of the test
- G01N2203/0222—Temperature
- G01N2203/0226—High temperature; Heating means
-
- 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
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/026—Specifications of the specimen
- G01N2203/0262—Shape of the specimen
- G01N2203/0278—Thin specimens
- G01N2203/0282—Two dimensional, e.g. tapes, webs, sheets, strips, disks or membranes
-
- 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
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/067—Parameter measured for estimating the property
- G01N2203/0676—Force, weight, load, energy, speed or acceleration
-
- 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
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/067—Parameter measured for estimating the property
- G01N2203/0682—Spatial dimension, e.g. length, area, angle
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- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The device and method of magnesium alloy plate and belt beaming limit and springback capacity is tested simultaneously, and device includes three-point bending die device, plate fixing device, the tension system being assemblied on stretching-machine；Round roller is assembled together with seaming chuck；Plate fixing device is made of groove profile support base and fixing end fixture；Tension system includes tension end fixture, guide wheel support base and connecting rope, and heat radiation plate is located between two roller seats, and the components such as round roller are located in insulation cover；Method is：(1) it is placed on after heating Strip in three-point bending die device, both ends are fixed respectively and apply tension；(2) control magnesium alloy is in test temperature；(3) start stretching-machine to carry out, according to stress, strain, ram travel curve, obtain beaming limit；(4) seaming chuck unloads, and springback capacity is obtained according to stroke registration.The device of the invention and method can measure performance, beaming limit and the springback capacity of the differently curved curvature of plank in primary experiment.
Description
Technical field
The invention belongs to material bending technical field of performance test, and in particular to it is curved that one kind testing magnesium alloy plate and belt simultaneously
The device and method of the bent limit and springback capacity.
Background technology
Magnesium alloy plate is widely used in aviation, traffic fortune because of the advantages that its low-density, high specific strength, good electromagnetic wave shielding
Defeated and electronics industry.Magnesium alloy plate can greatly save space convenience in transport in rolls, roll rear leveling and in rolls to the curved of magnesium plate
Qu Xingneng proposes higher requirement.
Plank bending property test method has V-type bending, three-point bending and four-point bending etc.；V-type bend test needs are matched
There are one the V-type mold formula device of V-type mold and a bending pressure head, three point bending test need with there are two lower backing roll and
The support multi-roll device of one upper bending pressure head, four-point bending test are needed equipped with upper and lower each two support roller devices.
Traditional V-type bend test method is the brake forming on stationary curved mold, can only be once molded a kind of curved
The plank of bent angle, it is relatively low to the utilization rate of mold；It is found through being retrieved to the prior art, Chinese patent literature CN
203508756 U, publication date 2014.04.02 disclose the new technique for improving V-type bending mould, including upper and lower mould, above,
Lower die holder, upper and lower mould support plate, pin, bolt, guide pillars and bushes etc.；The Novel V-shaped bending mould can be according to different tests item
Part adjusts mold angle, improves the utilization rate of mold；But the plank that different curvature is tested in first order buckling experiment is curved
Qu Xingneng also cannot achieve.
Three point bending test method be using different-diameter fillet upper male mould by sheet metal bending to specific angle, with table
Least radius when face does not crack is as bending property evaluation index；After either traditional unloading pressure, pickup observation
Crackle, or crackle is observed in real time with pressure, all it is that plank is bent to an an angle i.e. curvature, it can not be to different curvature
The bending property of plank is tested；Four-point bending test method is similar with three point bending test method, and two upper backup rolls are curved
Song arrives certain angle, and only two upper backup rolls can effectively reduce the influence of the shear stress in plank, and what is surveyed is pure
Intensity under bending；But four-point bending test method be equally material bending to predetermined angular, can not be to differently curved curvature
The bending property of plank is tested.The above bend mode only obtains the bending property of plank, and there is no the levelings with plank
And crimp property, beaming limit and springback capacity foundation contact.
Invention content
For existing magnesium alloy crooked test technology above shortcomings, the present invention provides a kind of while testing magnesium alloy
The device and method of Strip beaming limit and springback capacity, and contacted with plank leveling technique thereafter and crimp property foundation,
The performance of the differently curved curvature of plank is measured in primary experiment.
The device that magnesium alloy plate and belt beaming limit and springback capacity are tested while of the invention includes being assemblied on stretching-machine
Three-point bending die device, plate fixing device, tension system, electric heating system and insulation cover；Three-point bending die device
It is mainly made of pedestal, two roller seats, seaming chuck, round roller and two support rollers, round roller is assemblied in by connecting shaft and seaming chuck
Together, round roller is equipped with bottoming hole；Two support rollers are assembled together with a roller seat respectively, and two roller seats are fixed on pedestal
On；Plate fixing device is made of groove profile support base and fixing end fixture, and groove profile support base is fixedly connected on a roller seat, Gu
Fixed end fixture is used to one end of magnesium alloy plate and belt to be tested being fixed on groove profile support base top；Tension system by guide wheel,
Power end fixture, guide wheel support base, connecting rope, Miniature tension machine and tension tester composition, guide wheel support base are fixedly connected on separately
On one roller seat, the top of guide wheel support base is assembled together by connecting shaft and guide wheel, and connecting rope is assembled together with guide wheel,
Tension end fixture is used to the other end for testing magnesium alloy plate and belt being fixed on the front end of connecting rope, and the rear end of connecting rope is assemblied in
On Miniature tension machine, and part of the connecting rope between Miniature tension machine and guide wheel is equipped with tension tester；Electrical heating system
System is made of heat radiation plate, heating rod, temperature switch board and heating wires, on the holder of the heat radiation plate side of being set on the base,
Heating rod is assemblied in bottoming hole, and heating rod and heat radiation plate are connect by heating wires with temperature switch board respectively；It is wherein hot
Radiant panel is located between two roller seats, and groove profile support base and heat radiation plate are located at the both sides of a roller seat, guide wheel support base with
Heat radiation plate is located at the both sides of another roller seat；Wherein round roller, seaming chuck, two support rollers, pedestal, plate fixing device,
Force system and radiant panel are respectively positioned in insulation cover.
In above-mentioned apparatus, pedestal and insulation cover are located on stretching machine base, and seaming chuck passes through adapter and lifting platform assembles
Together, lifting platform is assembled together with two stretching-machine guide posts, and top and the stretching-machine upper beam of two stretching-machine guide posts assemble
Together, the bottom end of two stretching-machine guide posts is assembled together with machine base is stretched；Wherein adapter is slidingly sealed with insulation cover
Connection.
In above-mentioned apparatus, tension tester is connect by data line with data collecting system；Data collecting system also passes through
Galvanic couple line is connect with magnesium alloy plate and belt to be tested and foil gauge respectively, and wherein strain gauge adhesion is in magnesium alloy board to be tested
Material lower surface.
Above-mentioned seaming chuck includes two side plates and a top plate, and two side plates are located at the down either side of top plate, each side
Axis hole with round roller for being assembled together there are one being set on plate；Connecting pole is equipped with above top plate to be used to snap connection with adapter,
The horizontal cross-section on the top of connecting pole is discount vibram outlet shape, and the horizontal cross-section of lower part is circle, and the top of connecting pole is equipped with segment protrusion
In the vertical side of discount vibram outlet shape part.
Above-mentioned groove profile support base is the groove profile that side is put, and one is constituted by top plate and bottom plate, square side plate and two triangular side panels
Body structure, square side plate are equipped with notch with bottom plate, and a right-angle side of triangular side panels is connect with the side of square side plate, another
Right-angle side is connect with top plate；Bolt hole with roller seat for connecting there are two being set on bottom plate；Top plate is equipped with fixture hole.
Above-mentioned fixing end fixture and tension end fixture is made of upper fixture and lower fixture, and upper fixture is tabular, under
Fixture is integrally formed structure by side plate and bottom plate, and side plate bottom is located at bottom plate side, and latus inframedium is equipped with connection cord hole, bottom plate
It is equipped with fixture hole.
Above-mentioned guide wheel support base is made of riser portion and plate part, and the top of riser portion is set there are two side plate,
It is respectively equipped with an axis hole on two side plates to be used to be assembled together with guide wheel, the side of plate part and the bottom end of riser portion
Connection, plate part are equipped with bolt hole for being connect with roller seat.
The method that magnesium alloy plate and belt beaming limit and springback capacity are tested while of the invention be use above-mentioned apparatus, including
Following steps：
1, magnesium alloy plate and belt to be tested is heated to test temperature, be then placed in three-point bending die device, circle
Roll-in is above magnesium alloy plate and belt to be tested, and magnesium alloy plate and belt to be tested is pressed in above two support rollers, magnesium to be tested
The lower surface of alloy plate strip is pasted with foil gauge；One end of magnesium alloy plate and belt to be tested is fixed on slot by fixing end fixture
Type support base seat top, the other end are fixed on the front end of connecting rope by tension end fixture, apply tension by tension system；
2, opening temperature switch board, to round roller and radiant panel electrified regulation, and by radiant panel to support roller and to be tested
Magnesium alloy plate and belt is heated, and magnesium alloy plate and belt to be tested is made to maintain test temperature；
3, start stretching-machine, round roller is made to be moved down in company with seaming chuck, until magnesium alloy plate and belt to be tested is bent to gradually
Become wire shaped, the bending property of different curvature must be obtained by data collecting system, it is bent to obtain tension, strain and temperature stroke
Line is less than the curvature that corresponding curvature at 0.1% is magnesium alloy plate and belt to be tested in conjunction with equivalent strain curve graph in strain,
And then it can derive suitable leveling and curling rate under this curvature；Simultaneously according to stress, strain, ram travel curve, obtain
Obtain the beaming limit of magnesium alloy plate and belt to be tested；
4, after completing above-mentioned test, seaming chuck unloading according to the stroke registration of the seaming chuck of stretching-machine, obtains magnesium to be tested
The springback capacity of alloy plate strip.
In the above method, adapter is connected by a snap with seaming chuck, for being convenient for changing seaming chuck.
In the above method, pedestal both sides are connect with a baffle by axis pin respectively, and two baffles are respectively provided with an axis hole
It is assembled together with support roller, for being convenient for changing support roller.
The roller diameter of above-mentioned round roller is identical as the roller diameter of support roller.
In the above method, the upper fixture and lower fixture of fixing end fixture and tension end fixture are to be tested from upper and lower directions clamping
The width of magnesium alloy plate and belt, upper fixture and lower fixture is more than the width of magnesium alloy plate and belt to be tested, makes magnesium alloy to be tested
Strip uniform force in the direction of the width.
Above-mentioned data collecting system is multi-channel data recorder, and galvanic couple line connects with magnesium alloy plate and belt to be tested welding
It connects, strain gauge adhesion is in magnesium alloy plate and belt lower surface to be tested.
The device of the invention and method can measure the performance of the differently curved curvature of plank in primary experiment, test simultaneously
Magnesium alloy plate and belt beaming limit and springback capacity can be obtained according to temperature change, microstructure and the strain variation of test plank
It can by the seaming chuck stroke recording of strain, stress variation and stretching-machine digital display screen to suitable leveling and coiling temperature
To obtain the beaming limit and springback capacity of Strip；The variation that variation and the test plank strain of speed are pushed according to pressure head, can
To obtain suitable leveling and curling rate；It has further the advantage that simultaneously：Seaming chuck is heated with support roller, it can be with analog board
Material temperature correction directly with warm technology；By replacing seaming chuck round roller and support roller, the aligning and volume of different roller diameters can be simulated
It is bent；According to test plank thickness change roller seat spacing, that is, span, can simulate differential roller away from aligning.
Description of the drawings
The apparatus structure schematic diagram of magnesium alloy plate and belt beaming limit and springback capacity is tested while Fig. 1 is the present invention；
Fig. 2 is the seaming chuck three-view diagram in the embodiment of the present invention；
Fig. 3 is the groove profile support base three-view diagram in the embodiment of the present invention；
Fig. 4 is fixing end fixture or tension end fixture three-view diagram in the embodiment of the present invention；
Fig. 5 is the guide wheel support base three-view diagram in the embodiment of the present invention；
Fig. 6 be in the embodiment of the present invention in the tension variation curve graph that measures；
Fig. 7 be in the embodiment of the present invention in the strain variation curve graph that measures；
Fig. 8 be in the embodiment of the present invention in the temperature changing curve diagram that measures；
In figure：1, stretching-machine upper beam, 2, stretching-machine guide post, 3, stretching-machine lifting platform, 4, adapter, 5, seaming chuck, 6, solid
Fixed end fixture, 7, magnesium alloy plate and belt to be tested, 8, guide wheel, 9, groove profile support base, 10, support roller, 11, connecting rope, 12, gear
Plate, 13, guide wheel support base, 14, stretch machine base, 15, Miniature tension machine, 16, three-point bending mold base, 17, temperature control
Cabinet, 18, tension tester, 19, foil gauge, 20, heat radiation plate, 21, heating wires, 22, insulation cover, 23, multi-channel data note
Record instrument, 24, galvanic couple line, 25, roller seat, 26, tension end fixture, 27, round roller, 28, data line, 29, connecting pole, 30, seaming chuck top
Plate, 31, seaming chuck left plate, 32, seaming chuck right plate, 33, groove profile support base top plate, 34, groove profile support base triangular side panels,
35, groove profile support base side side plate, 36, groove profile support base bottom plate, 37, upper fixture, 38, lower fixture, 39, guide wheel support base riser portion
Point, 40, guide wheel support base plate part, 41, guide wheel support base side plate.
Specific implementation mode
The stretching-machine model SANSCMT 5000 used in the embodiment of the present invention.
The temperature switch board model XMT-D-2201 used in the embodiment of the present invention.
The tension tester model SL-10T used in the embodiment of the present invention.
The multi-channel data recorder model HIOKI 2013 used in the embodiment of the present invention.
The magnesium alloy plate and belt to be tested used in the embodiment of the present invention is AZ31 magnesium alloys.
Apparatus structure such as Fig. 1 of magnesium alloy plate and belt beaming limit and springback capacity is tested while in the embodiment of the present invention
It is shown, including be assemblied on stretching-machine three-point bending die device, plate fixing device, tension system, electric heating system and
Insulation cover；Three-point bending die device mainly by 16, two symmetrically arranged roller seats 25 of three-point bending mold base, seaming chuck 5,
Round roller 27 and two support rollers 10 are constituted, and round roller 27 is assembled together by connecting shaft and seaming chuck 5, and round roller 27 is equipped with heating
Hole；Two support rollers 10 are assembled together with a roller seat 25 respectively, and two roller seats 25 are fixed on three-point bending mold base 16
On；
Plate fixing device is made of groove profile support base 9 and fixing end fixture 6, and groove profile support base 9 is fixedly connected on one
On three-point bending mold base 16, fixing end fixture 6 is used to one end of magnesium alloy plate and belt 7 to be tested being fixed on groove profile support
9 tops of seat；
Tension system is by guide wheel 8, tension end fixture 26, guide wheel support base 13, connecting rope 11, Miniature tension machine 15 and tension
Tester 18 forms, and guide wheel support base 13 is fixedly connected on another roller seat 25, and the top of guide wheel support base 13 passes through connection
Axis is assembled together with guide wheel 8, and connecting rope 11 is assembled together with guide wheel 8, and tension end fixture 26 will be for that will test magnesium alloy plate
The other end of band 7 is fixed on the front end of connecting rope 11, and the rear end of connecting rope 11 is assemblied on Miniature tension machine 15, and connecting rope
11 part between Miniature tension machine 15 and guide wheel 8 is equipped with tension tester 18；
Electric heating system is made of heat radiation plate 20, heating rod, temperature switch board 17 and heating wires 21, heat radiation plate 20
It is arranged on the holder above three-point bending mold base 16, heating rod is assemblied in bottoming hole, heating rod and heat radiation plate 20
It is connect respectively with temperature switch board 17 by heating wires 21；Wherein heat radiation plate 20 is located between two roller seats 25, and groove profile
Support base 9 and heat radiation plate 20 are located at the both sides of a roller seat 25, and guide wheel support base 13 and heat radiation plate 20 are located at another roller
The both sides of seat 25；
Round roller 27,5, two support rollers 10 of seaming chuck, 16, two roller seats 25 of three-point bending mold base, plank fix dress
It sets, tension system and heat radiation plate 20 are respectively positioned in insulation cover 22；
Three-point bending mold base 16 and insulation cover 22 setting stretch machine base 14 on, seaming chuck 5 by adapter 4 with
Stretching-machine lifting platform 3 is assembled together, and stretching-machine lifting platform 3 is assembled together with two stretching-machine guide posts 2, and two stretching-machines are led
The top of column 2 is assembled together with stretching-machine upper beam 1, and the bottom end of two stretching-machine guide posts 2 is assemblied in one with machine base 14 is stretched
It rises；Wherein adapter 4 is slidably and sealingly connected with insulation cover 22；
Support roller 10 is assembled together by connecting shaft and baffle 12, and baffle 12 is fixed on by axis pin on roller seat 25；
22 outside of insulation cover is equipped with data collecting system, and data collecting system is multi-channel data recorder 23；Tension is surveyed
Examination instrument 18 is connect by data line 28 with multi-channel data recorder 23；Multi-channel data recorder 23 is also divided by galvanic couple line 24
It is not connect with magnesium alloy plate and belt 7 to be tested and foil gauge 19, wherein foil gauge 19 is pasted onto magnesium alloy plate and belt 7 to be tested
Lower surface；
The structure of seaming chuck 5 is as shown in Fig. 2, include seaming chuck top plate 30, seaming chuck left plate 31 and seaming chuck right plate
32, two side plates are located at the down either side of seaming chuck top plate 30, set on each side plate there are one axis hole be used for and round roller 25 assemble
Together；30 top of seaming chuck top plate is equipped with connecting pole 29 and is used to snap connection with adapter 4, the level on the top of connecting pole 29
Section is discount vibram outlet shape, and the horizontal cross-section of lower part is circle, and the top of connecting pole 29 is located at discount vibram outlet shape part equipped with segment protrusion
In vertical side；
Groove profile support base 9 is the groove profile that side is put, and structure is as shown in figure 3, by 33, the two groove profile supports of groove profile support base top plate
Seat triangular side panels 34, groove profile support base side side plate 35 and groove profile support base bottom plate 36 are integrally formed structure, groove profile support base side
The lower section of side plate 35 and the centre of groove profile support base bottom plate 36 open up the notch of a connection, the gusset for being inserted into roller seat 25；
One right-angle side of two groove profile support base triangular side panels 34 is connect with the side of groove profile support base side side plate 35, another is straight
The arm of angle is connect with groove profile support base top plate 33；Bolt hole with roller seat 25 for connecting there are two being set on groove profile support base bottom plate 36；
Groove profile support base top plate 33 is equipped with fixture hole；
The structure of fixing end fixture 6 and tension end fixture 26 as shown in figure 4, be made of upper fixture 37 and lower fixture 38,
Upper fixture 37 is tabular, and lower fixture 38 is integrally formed structure by side plate and bottom plate, and side plate bottom is located at bottom plate side, wherein side
Plate is equipped with connection cord hole, and bottom plate is equipped with fixture hole；
The connection of fixing end fixture 6 and groove profile support base 9 is connected by bolt hole using bolt；Tension end fixture 26
Connection cord hole across connecting rope 11 with that will test magnesium alloy plate and belt 7 for being assembled together；Fixing end fixture 6 and tension end folder
Tool 26 is arranged to identical structure and is easy for replacing；
Guide wheel clamping support is as shown in figure 5, by guide wheel support base riser portion 39 and guide wheel support base plate part 40
Group is into a single integrated structure, and the top of guide wheel support base riser portion 39 is set there are two guide wheel support base side plate 41, and two guide wheels support
Be respectively equipped with an axis hole on seat side plate 41 for being assembled together with guide wheel 8, the side of guide wheel support base plate part 40 with
The bottom end of guide wheel support base riser portion 39 connects, and guide wheel support base plate part 40 is equipped with bolt hole and is used to connect with roller seat 25
It connects；
The notch of a connection, the gusset for being inserted into roller seat 25 are opened up among guide wheel support base plate part 40.
Embodiment 1
Using the device for testing magnesium alloy plate and belt beaming limit and springback capacity simultaneously, by the magnesium to be tested of thickness 3.5mm
Alloy plate strip is heated to test temperature, is then placed in three-point bending die device, and round roller is pressed in magnesium alloy plate to be tested
Above band, magnesium alloy plate and belt to be tested is pressed in above two support rollers, and the lower surface of magnesium alloy plate and belt to be tested is viscous
Post foil gauge；One end of magnesium alloy plate and belt to be tested is fixed on groove profile support base seat top by fixing end fixture, another
End is fixed on the front end of connecting rope by tension end fixture, applies tension by tension system；
Opening temperature switch board, to round roller and radiant panel electrified regulation, and by radiant panel to support roller and magnesium to be tested
Alloy plate strip is heated, and magnesium alloy plate and belt to be tested is made to maintain test temperature；
Start stretching-machine, round roller is made to be moved down in company with seaming chuck, until magnesium alloy plate and belt to be tested bends to gradual change
Wire shaped must obtain the bending property of different curvature by data collecting system, obtain tension, strain and temperature stroke curve,
In conjunction with equivalent strain curve graph, it is less than the curvature that corresponding curvature at 0.1% is magnesium alloy plate and belt to be tested in strain, in turn
It can derive suitable leveling and curling rate under this curvature；Simultaneously according to stress, strain, ram travel curve, waited for
Test the beaming limit of magnesium alloy plate and belt；
After completing above-mentioned test, seaming chuck unloading according to the stroke registration of the seaming chuck on stretching-machine, obtains magnesium to be tested
The springback capacity of alloy plate strip；
Adapter is connected by a snap with seaming chuck, for being convenient for changing seaming chuck；
Pedestal both sides are connect with a baffle by axis pin respectively, and two baffles are respectively provided with an axis hole and are assembled with support roller
Together, for being convenient for changing support roller；
The roller diameter of round roller is identical as the roller diameter of support roller；
The upper fixture and lower fixture of fixing end fixture and tension end fixture clamp magnesium alloy board to be tested from upper and lower directions
The width of material, upper fixture and lower fixture is more than the width of magnesium alloy plate and belt to be tested, makes magnesium alloy plate and belt to be tested in width
Spend uniform force on direction；
Galvanic couple line is welded to connect with magnesium alloy plate and belt to be tested, and strain gauge adhesion is in magnesium alloy plate and belt following table to be tested
Face；
Data collecting system records the magnesium alloy plate and belt to be tested of 3.5mm in bending process load loads 16s, surveys
Try the tension variation of position Point1~5, the strain variations of position Point1~7 and and entire bending process 100s temperature
Variation；Its tension variation curve as shown in fig. 6, strain variation curve as shown in fig. 7, temperature variation curve is as shown in Figure 8；In conjunction with
Equivalent strain curve graph is less than the corresponding curvature suitable curvature of thickness Strip thus at 0.1% in strain, and then can derive
Go out suitable leveling and curling rate under this curvature；By the seaming chuck stroke recording of the digital display screen of stretching-machine, obtain
Ram travel curve；According to stress, strain and each curve of ram travel, obtains the beaming limit of Strip and obtained when pressure head unloads
To the springback capacity of Strip；It is identical that test result tests the result of formation with traditional technology respectively.
Claims (8)
1. device that is a kind of while testing magnesium alloy plate and belt beaming limit and springback capacity, it is characterised in that stretched including being assemblied in
Three-point bending die device, plate fixing device, tension system, electric heating system and insulation cover on machine；Three-point bending mold
Device is mainly made of pedestal, two roller seats, seaming chuck, round roller and two support rollers, and round roller is filled by connecting shaft and seaming chuck
With together, round roller is equipped with bottoming hole；Two support rollers are assembled together with a roller seat respectively, and two roller seats are fixed on bottom
On seat；Plate fixing device is made of groove profile support base and fixing end fixture, and groove profile support base is fixedly connected on a roller seat,
Fixing end fixture is used to one end of magnesium alloy plate and belt to be tested being fixed on groove profile support base top；Tension system by guide wheel,
Tension end fixture, guide wheel support base, connecting rope, Miniature tension machine and tension tester composition, guide wheel support base are fixedly connected on
On another roller seat, the top of guide wheel support base is assembled together by connecting shaft and guide wheel, and connecting rope is assemblied in one with guide wheel
It rises, tension end fixture is used to the other end for testing magnesium alloy plate and belt being fixed on the front end of connecting rope, the rear end dress of connecting rope
It fits on Miniature tension machine, and part of the connecting rope between Miniature tension machine and guide wheel is equipped with tension tester；Electricity adds
Hot systems are made of heat radiation plate, heating rod, temperature switch board and heating wires, the holder of the heat radiation plate side of being set on the base
On, heating rod is assemblied in bottoming hole, and heating rod and heat radiation plate are connect by heating wires with temperature switch board respectively；Wherein
Heat radiation plate is located between two roller seats, and groove profile support base and heat radiation plate are located at the both sides of a roller seat, guide wheel support base
It is located at the both sides of another roller seat with heat radiation plate；Wherein round roller, seaming chuck, two support rollers, pedestal, plate fixing device,
Tension system and radiant panel are respectively positioned in insulation cover.
2. device that is according to claim 1 while testing magnesium alloy plate and belt beaming limit and springback capacity, feature exist
It is located in the pedestal and insulation cover and stretches on machine base, seaming chuck is assembled together by adapter and lifting platform, lifting
Platform is assembled together with two stretching-machine guide posts, and top and the stretching-machine upper beam of two stretching-machine guide posts are assembled together, two
The bottom end of stretching-machine guide post is assembled together with machine base is stretched；Wherein adapter is slidably and sealingly connected with insulation cover.
3. device that is according to claim 1 while testing magnesium alloy plate and belt beaming limit and springback capacity, feature exist
It is connect with data collecting system by data line in the tension tester；Data collecting system also by galvanic couple line respectively with
Magnesium alloy plate and belt and foil gauge connection to be tested, wherein strain gauge adhesion is in magnesium alloy plate and belt lower surface to be tested.
4. device that is according to claim 1 while testing magnesium alloy plate and belt beaming limit and springback capacity, feature exist
Include two side plates and a top plate in the seaming chuck, two side plates are located at the down either side of top plate, are set on each side plate
There are one axis holes for being assembled together with round roller；It is equipped with connecting pole above top plate to be used to snap connection with adapter, connecting pole
The horizontal cross-section on top be discount vibram outlet shape, the horizontal cross-section of lower part is circle, and the top of connecting pole is equipped with segment protrusion and is located at circle
In the vertical side for lacking shape part.
5. device that is according to claim 1 while testing magnesium alloy plate and belt beaming limit and springback capacity, feature exist
It is the groove profile that side is put in the groove profile support base, knot is integrally formed by top plate and bottom plate, square side plate and two triangular side panels
Structure, square side plate are equipped with notch with bottom plate, and a right-angle side of triangular side panels is connect with the side of square side plate, another right angle
Side is connect with top plate；Bolt hole with roller seat for connecting there are two being set on bottom plate；Top plate is equipped with fixture hole.
6. device that is according to claim 1 while testing magnesium alloy plate and belt beaming limit and springback capacity, feature exist
Be made of upper fixture and lower fixture in the fixing end fixture and tension end fixture, upper fixture is tabular, lower fixture by
Side plate and bottom plate are integrally formed structure, and side plate bottom is located at bottom plate side, and latus inframedium is equipped with connection cord hole, and bottom plate is equipped with
Fixture hole.
7. device that is according to claim 1 while testing magnesium alloy plate and belt beaming limit and springback capacity, feature exist
It is made of riser portion and plate part in the guide wheel support base, the top of riser portion sets that there are two side plate, two sides
An axis hole is respectively equipped on plate for being assembled together with guide wheel, the side of plate part and the bottom end of riser portion connect,
Plate part is equipped with bolt hole for being connect with roller seat.
8. method that is a kind of while testing magnesium alloy plate and belt beaming limit and springback capacity, it is characterised in that use claim 1
The device, includes the following steps：
(1) magnesium alloy plate and belt to be tested is heated to test temperature, be then placed in three-point bending die device, round roller pressure
Above magnesium alloy plate and belt to be tested, magnesium alloy plate and belt to be tested is pressed in above two support rollers, magnesium alloy to be tested
The lower surface of Strip is pasted with foil gauge；One end of magnesium alloy plate and belt to be tested is fixed on groove profile branch by fixing end fixture
Seat seat top is supportted, the other end is fixed on the front end of connecting rope by tension end fixture, applies tension by tension system；
(2) opening temperature switch board closes support roller and magnesium to be tested to round roller and radiant panel electrified regulation, and by radiant panel
Golden plate band is heated, and magnesium alloy plate and belt to be tested is made to maintain test temperature；
(3) start stretching-machine, round roller is made to be moved down in company with seaming chuck, until magnesium alloy plate and belt to be tested bends to transition line
Shape must obtain the bending property of different curvature by data collecting system, obtain tension, strain and temperature stroke curve, knot
Equivalent strain curve graph is closed, is less than the curvature that corresponding curvature at 0.1% is magnesium alloy plate and belt to be tested, Jin Erke in strain
Derive suitable leveling and curling rate under this curvature；Simultaneously according to stress, strain, ram travel curve, obtain to be measured
Try the beaming limit of magnesium alloy plate and belt；
(4) after completing above-mentioned test, seaming chuck unloading obtains magnesium to be tested and closes according to the stroke registration of the seaming chuck of stretching-machine
The springback capacity of golden plate band.
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| CN111504769A (en) * | 2020-05-27 | 2020-08-07 | 武汉科技大学 | Pressure transmission assembly of three-point bending loading device for testing flexural strength of refractory material |
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