CN105241752B - A kind of Forming Limit of Sheet Metals figure test device and its method - Google Patents
A kind of Forming Limit of Sheet Metals figure test device and its method Download PDFInfo
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- CN105241752B CN105241752B CN201410504759.3A CN201410504759A CN105241752B CN 105241752 B CN105241752 B CN 105241752B CN 201410504759 A CN201410504759 A CN 201410504759A CN 105241752 B CN105241752 B CN 105241752B
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Abstract
The present invention relates to a kind of Forming Limit of Sheet Metals figure test device and its method, belong to plate shaping technical field of measurement and test.Forming limit diagram test device and method of the present invention can realize the test of Forming Limit of Sheet Metals figure right half part on common cupping machine.Forming limit diagram test device of the present invention is made up of the wedge-shaped die of multigroup different key grooves, and every group of wedge-shaped die includes four wedge-shaped dies, and upper wedge-shaped die above and below lower wedge-shaped die with being oppositely arranged, and left wedge-shaped die and right wedge-shaped die or so are oppositely arranged.Upper wedge-shaped die is mutually slidably matched with left and right wedge-shaped die by lozenges, and lower wedge-shaped die is also mutually slidably matched with left and right wedge-shaped die by lozenges.Sample is cross, and four terminations of sample are separately fixed on upper and lower, left and right wedge-shaped die.During experiment, the relative motion up and down of upper wedge-shaped die and lower wedge-shaped die drives the left and right relative motion of left wedge-shaped die and right wedge-shaped die, so as to realize the deformation of sample two-dimensional state of stress.
Description
Technical field
The present invention relates to belong to plate shaping technical field of measurement and test.
Background technology
Sheet forming is important part in material forming field, is occupied highly importantly in national economy
Position.Plate is often in plane stress state in plate forming process, thus it is general weighed using forming limit diagram plate into
Shape, forming limit diagram is also the important evidence that plate forming technology is formulated and related tool and mould is designed.How accurately to obtain
The forming limit diagram of plate is an important research direction in plate molding field.
At present, Forming Limit of Sheet Metals figure is mainly is obtained using the method for punching block bulging, such as national standard " GB/T
15825.8-2008 " described.When testing forming limit diagram using punching block expanding method, it is necessary first to which processing prepares one group different long
The rectangular specimen of wide ratio, then etches grid in specimen surface using certain method, is then fixed on ready sample
Between blank holder and cavity plate, and bulging carried out using hemispherical punch-pin until specimen broke, finally measure that different samples are critical to be opened
Split the length shaft size of grid and convert and obtain forming limit diagram.
For punching block expanding method, the sheet material after experiment terminates is changed into spherical, this accurate test to subsequent meshes size
Difficulty is caused, is unfavorable for obtaining accurate forming limit diagram.
The content of the invention
Present invention aim to address in existing forming limit diagram right half part e measurement technology, because sheet deformation is curved surface
And can not accurately test the problem of Critical Cracking is strained.
To realize that the technical scheme that the object of the invention is used is such, including for installing the upper wedge shape of test specimen to be measured
Template, lower wedged template, left wedged template and right wedged template.
The upper wedged template, lower wedged template, left wedged template and right wedged template are combined.
The lower surface of upper wedged template is that plane, the upper surface of lower wedged template are plane.
The upper wedged template each side has a working face, the two working faces and upper wedged template
The angle of lower surface is α.
The lower wedged template each side has a working face, the two working faces and lower wedged template
The angle of upper surface is α.
Its right end face of the left wedged template is provided with two triangular grooves.In the two triangular grooves, triangular groove above
One working face of trough wall surface and upper wedged template coordinates, a work of the trough wall surface of triangular groove below and lower wedged template
Make plane cooperation.
The left end face of the right wedged template is provided with two triangular grooves.In the two triangular grooves, triangular groove above
One working face of trough wall surface and upper wedged template coordinates, a work of the trough wall surface of triangular groove below and lower wedged template
Make plane cooperation.
The test specimen to be measured is " cross " shape, and its each branch is fixed on wedged template, lower wedged template, a left side respectively
On wedged template and right wedged template.
The upper wedged template and lower wedged template connection stretching device.
If it is acute angle that angle, which is α, when pulling upper wedged template and lower wedged template up and down respectively, left wedged template
Moved to the left and right sides respectively with right wedged template.
If it is right angle that angle, which is α, when pulling upper wedged template and lower wedged template up and down respectively, left wedged template
Do not moved with right wedged template.
More specifically, a kind of Forming Limit of Sheet Metals figure test device, including for installing the upper wedge-shaped die of test specimen to be measured
Plate, lower wedged template, left wedged template and right wedged template.
The upper wedged template is identical with lower wedge-shaped shape of template.The left wedged template and right wedged template shape phase
Together.
The upper end of the upper wedged template is that connection handle I, lower end are equicrural ladder plates I.The left side of equicrural ladder plate I
Inclined plane is that working face I-I, the inclined plane on right side are working face I-II.The connection handle I is with being located above upper wedged template
Stretching device I is connected.
The lower end of the lower wedged template is that connection handle II, upper end are equicrural ladder plates II.The equicrural ladder plate II is left
The inclined plane of side is that working face II-II, the inclined plane on right side are working face II-I.The connection handle II is with being located at lower wedged template
The stretching device II of top is connected.
Vee gutter III-I and vee gutter III-II are provided with the right side of the left wedged template.The vee gutter III-I
Entity part between vee gutter III-II is rectangular slab III.The inclined plane of the upper end of vee gutter III-I is working face
Ⅲ-Ⅰ.The inclined plane of the lower end of vee gutter III-II is working face III-II.
Vee gutter IV-II and vee gutter IV-I are provided with the left of the right wedged template.The vee gutter IV-I
Entity part between vee gutter IV-II is rectangular slab IV.The inclined plane of the upper end of vee gutter IV-II is working face
Ⅳ-Ⅱ.The inclined plane of the lower end of vee gutter IV-I is working face IV-I.
It is lower wedged template below the upper wedged template.The left wedged template is located at upper wedged template and lower wedge shape
The left side of template.The right wedged template is located at the right side of upper wedged template and lower wedged template.
The both sides of the equicrural ladder plate I are respectively embedded into vee gutter III-I and vee gutter IV-II so that the cunning
It is dynamic that face I-I is contacted with sliding surface III-I, the sliding surface I-II is contacted with sliding surface IV-II.
The both sides of the equicrural ladder plate II are respectively embedded into vee gutter III-II and vee gutter IV-I so that described
Sliding surface II-II is contacted with sliding surface III-II, the sliding surface II-I is contacted with sliding surface IV-I.
The test specimen to be measured is cross.Each branch of the test specimen to be measured is connected to wedged template, hyposphene
On shape template, left wedged template and right wedged template.
Further, the base angle of the equicrural ladder plate I and equicrural ladder plate II is α.The vee gutter III-I, triangle
The groove angle of shape groove III-II, vee gutter IV-I and vee gutter IV-II is α.
Further, there is connection respectively on the upper wedged template, lower wedged template, left wedged template and right wedged template
Pin I, connecting pin II, connecting pin III and connecting pin IV.
A kind of Forming Limit of Sheet Metals figure method of testing of use said apparatus is also claimed in the present invention.
It is an advantage of the invention that:
1st, realized and be slidably matched by lozenges (working face) respectively between each wedged template being in contact.Testing
Cheng Zhong, the relative motion up and down of upper wedge-shaped die and lower wedge-shaped die can promote the left and right relative motion of left wedge-shaped die and right wedge-shaped die,
So as to realize deformation of " ten " the shape sample under two-dimensional state of stress, and ensure that sample is always plane in experimentation
Shape, it is to avoid traditional expanding method because sample is curving causes the problem of strain measurement is inaccurate.
2nd, structure and principle of the present invention are relatively easy, can be applied on common tensile testing machine, sheet material is obtained so as to test
Right half part forming limit diagram.
3rd, the present invention is not changed by sheet metal thickness and influenceed, and different moulds will not be changed because of the sheet material of different-thickness
Tool, is particularly suitable for use in the test that thickness is 0.5mm~3mm Forming Limit of Sheet Metals figures.
4th, the present invention can prepare multigroup wedged template for having a different angle wedge-shaped faces, complete right half part forming limit
The test of figure.
Brief description of the drawings
Fig. 1 is test device wedge-shaped die assembling schematic diagram of the present invention;
Fig. 2 is wedge-shaped die schematic diagram in test device of the present invention;
Fig. 3 is wedge-shaped die schematic diagram under test device of the present invention;
Fig. 4 is the left wedge-shaped die schematic diagram of test device of the present invention;
Fig. 5 is the right wedge-shaped die schematic diagram of test device of the present invention;
Fig. 6 tests the sample schematic diagram that forming limit diagram is used for test device of the present invention.
In figure:
Upper wedged template (1), connection handle I (101), equicrural ladder plate I (102), connecting pin I (103), working face I-I
(1021), working face I-II (1022),
Lower wedged template (2), connection handle II (201), equicrural ladder plate II (202), connecting pin II (203), working face II-
I (2021), working face II-II (2022),
Left wedged template (3), vee gutter III-I (301), vee gutter III-II (302), rectangular slab III (303), connection
Pin III (304), working face III-I (3021), working face III-II (3022),
Right wedged template (4), vee gutter IV-I (401), vee gutter IV-II (402), rectangular slab IV (403), connection
Pin IV (404), working face IV-I (4021), working face IV-II (4022),
Test specimen (5) to be measured, connecting hole I (501), connecting hole II (502), connecting hole III (503), connecting hole IV (504).
Embodiment
The invention will be further described with reference to the accompanying drawings and examples, but should not be construed above-mentioned theme of the invention
Scope is only limitted to following embodiments.Without departing from the idea case in the present invention described above, known according to ordinary skill
Know and customary means, make various replacements and change, all should include within the scope of the present invention.
Embodiment 1:
A kind of Forming Limit of Sheet Metals figure test device, including for the upper wedged template 1 for installing test specimen 5 to be measured, lower wedge shape
Template 2, left wedged template 3 and right wedged template 4.
Referring to Fig. 1, the upper wedged template 1, lower wedged template 2, left wedged template 3 and right wedged template 4 are combined one
Rise.
The lower surface of upper wedged template 1 is that plane, the upper surface of lower wedged template 2 are plane.
The upper wedged template 1 each side has a working face, the two working faces and upper wedged template 1
The angle of lower surface be α.
The lower wedged template 2 each side has a working face, the two working faces and lower wedged template 2
The angle of upper surface be α.
Its right end face of the left wedged template 3 is provided with two triangular grooves.The two triangular grooves (" V " shape groove) include two
Individual trough wall surface.In triangular groove, a working face of the trough wall surface of top and upper wedged template 1 coordinates, the trough wall surface of lower section with
One working face of lower wedged template 2 coordinates (after each plank is combined, the contact of face).
The left end face of the right wedged template 4 is provided with two triangular grooves.In the two triangular grooves, triangular groove above
One of the working face cooperation of trough wall surface and upper wedged template 1, the trough wall surface of triangular groove below and lower wedged template 2
Working face coordinates.
The test specimen to be measured 5 is " cross " shape (just having four branches), and its each branch is fixed on wedge-shaped die respectively
On plate 1, lower wedged template 2, left wedged template 3 and right wedged template 4.
The upper wedged template 1 and lower wedged template 2 connection stretching device.When starting stretching device, the upper He of wedged template 1
Lower wedged template 2 is upward respectively, move down, and stretches the test specimen 5 to be measured.
If it is acute angle that angle, which is α, when pulling upper wedged template 1 and lower wedged template 2 up and down respectively, left wedge-shaped die
Plate 3 and right wedged template 4 are moved to the left and right sides respectively.
If it is right angle that angle, which is α, when pulling upper wedged template 1 and lower wedged template 2 up and down respectively, left wedge-shaped die
Plate 3 and right wedged template 4 are not moved.
Embodiment 2:
A kind of Forming Limit of Sheet Metals figure test device, including for the upper wedged template 1 for installing test specimen 5 to be measured, lower wedge shape
Template 2, left wedged template 3 and right wedged template 4.
The upper wedged template 1 is identical with the lower shape of wedged template 2.Left wedged template 3 and right wedged template 4 shape
It is identical.
The upper wedged template 1, lower wedged template 2, left wedged template 3 and right wedged template 4 are stitched together.
The both sides of the upper wedged template 1 coordinate with left wedged template 3 and right wedged template 4 respectively.The lower wedge-shaped die
The both sides of plate 2 coordinate with left wedged template 3 and right wedged template 4 respectively.
The test specimen to be measured 5 is " cross " shape, and its each branch is fixed on wedged template 1, lower wedged template respectively
2nd, on left wedged template 3 and right wedged template 4.
The upper wedged template 1 and lower wedged template 2 connection stretching device.I.e. upper 2 points of wedged template 1 and lower wedged template
It is not connected with the upper lower chuck of stretching device, when starting stretching device, upper wedged template 1 is moved up, lower wedged template 2 is downward
It is mobile.
If the both sides of the upper wedged template 1 are with being acute angle (upper wedge shape at left wedged template 3 and the cooperation of right wedged template 4
The both sides wedge angle of template 1 is respectively embedded into left wedged template 3 and right wedged template 4), and the lower wedged template 2 and left wedge shape
For acute angle, (the both sides wedge angle of lower wedged template 2 is respectively embedded into left wedged template 3 and right wedge at template 3 and the cooperation of right wedged template 4
In shape template 4).When pulling upper wedged template 1 and lower wedged template 2 up and down respectively, left wedged template 3 and right wedged template 4
Move to the left and right sides respectively.At this moment, four direction stretches test specimen 5 vertically and horizontally.
If the both sides of the upper wedged template 1 are with being right angle at left wedged template 3 and the cooperation of right wedged template 4, and described
Lower wedged template 2 is with being right angle at left wedged template 3 and the cooperation of right wedged template 4.Pull upper wedged template 1 up and down respectively
During with lower wedged template 2, left wedged template 3 and right wedged template 4 are not moved.At this moment, up and down direction stretching test specimen 5.
Embodiment 3:
A kind of Forming Limit of Sheet Metals figure test device, including for the upper wedged template 1 for installing test specimen 5 to be measured, lower wedge shape
Template 2, left wedged template 3 and right wedged template 4.These masterplates are the metallic plates with same thickness.Alleged by the present embodiment
The shape of template, is the shape of each piece of metallic plate plate face.
Referring to Fig. 1, the upper wedged template 1 is identical with the lower shape of wedged template 2, the size of each several part, on the two
Under symmetrically put.The left wedged template 3 is identical with the right shape of wedged template 4, the size of each several part, and the two left and right is right
Put with claiming.
The upper end of the upper wedged template 1 is that connection handle I 101, lower end are equicrural ladder plates I 102, that is, causes upper wedge-shaped die
The shape of plate 1 is similar to " mountain " word of Chinese character.Referring to Fig. 2, because isosceles trapezoid is equal with two equal base angles and two
Waist, so, the left and right sides of equicrural ladder plate I 102 has the equal wedge angle of angle (i.e. corresponding to the base angle of isosceles trapezoid
α);The both sides of equicrural ladder plate I 102 have the working face of equal length (i.e. corresponding to two waists of isosceles trapezoid).It is described etc.
Working face I-I 1021, the working face I-II 1022 on right side in the left side of waist trapezoidal plate I 102.The connection handle I 101 is with being located at upper wedge
The stretching device I of the top of shape template 1 is connected.In embodiment, above and below II same stretching-machine of stretching device I and stretching device
Chuck.
The lower end of the lower wedged template 2 is that connection handle II 201, upper end are equicrural ladder plates II 202, that is, causes hyposphene shape
The shape of template 2 is similar to " mountain " word for turning the Chinese character write around.Referring to Fig. 3, because isosceles trapezoid has two equal bottoms
The angle waist equal with two, so, the wedge angle that the left and right sides of equicrural ladder plate II 202 has angle equal (corresponds to
The base angle of isosceles trapezoid);The both sides of equicrural ladder plate II 202 have the working face of equal length (i.e. corresponding to isosceles trapezoid
Two waists).Working face II-II 2022, the working face II-I 2021 on right side in the left side of equicrural ladder plate II 202.The company
Handle II 201 is connect to be connected with the stretching device II positioned at the lower top of wedged template 2.
What deserves to be explained is, the connection handle I 101, equicrural ladder plate I 102, connecting pin I 103, the and of working face I-I 1021
Working face I-II 1022, respectively with connection handle II 201, equicrural ladder plate II 202, connecting pin II 203, working face II-I 2021 and
Shape, the size all same of working face II-II 2022.
The left wedged template 3 is initially the metallic plate of one piece of rectangle, after processing, the right side opening of the left wedged template 3
There are the vee gutter III-I 301 and vee gutter III-II 302 of two plate face of insertion.The vee gutter III-I 301 and triangle
Entity part between shape groove III-II 302 is rectangular slab III 303.The shape for so allowing for left wedged template 3 is similar to letter
E.Vee gutter III-I 301 is located at the top of vee gutter III-II 302.Vee gutter III-I 301 and vee gutter III-II 302
Notch is in the right flank of left wedged template 3, and bottom land angle is α.The surface of the lower end of vee gutter III-I 301 be horizontal plane,
The surface of upper end is inclined plane, and this causes (section) of vee gutter III-I 301 to be shaped as right angled triangle.The vee gutter
The inclined plane of III-I 301 upper end is sliding surface III-I 3021.Similar, the surface of the lower end of the vee gutter III-II 302 is
Inclined plane, the surface of upper end are horizontal plane, and this causes (section) of vee gutter III-II 302 to be shaped as right angled triangle.It is described
The inclined plane of the lower end of vee gutter III-II 302 is sliding surface III-II 3022.
The right wedged template 4 is initially the metallic plate of one piece of rectangle, after processing, and the left side of the right wedged template 4 is opened
There are the vee gutter IV-II 402 and vee gutter IV-I 401 of two plate face of insertion.The vee gutter IV-I 401 and triangle
Entity part between shape groove IV-II 402 is rectangular slab IV 403.The shape for so allowing for right wedged template 4 is similar to letter
E.Vee gutter IV-II 401 is located at the lower section of vee gutter IV-I 402.Vee gutter IV-II 402 and vee gutter IV-I 401
Notch is in the left surface of right wedged template 4, and bottom land angle is α.
The surface of the lower end of vee gutter IV-II 402 is that horizontal plane, the surface of upper end are inclined plane, and this causes triangle
(section) of groove IV-II 402 is shaped as right angled triangle.The inclined plane of the upper end of vee gutter IV-II 402 is slip
Face IV-II 4022.Similar, the surface of the lower end of the vee gutter IV-I 401 is that inclined plane, the surface of upper end are level
Face, this causes (section) of vee gutter IV-I 401 to be shaped as right angled triangle.The lower end of vee gutter IV-I 401 is inclined
Inclined-plane is sliding surface IV-I 4021.
The lower section of the upper wedged template 1 is lower wedged template 2.The left wedged template 3 is located at upper wedged template 1 with
The left side of wedged template 2.The right wedged template 4 is located at the right side of upper wedged template 1 and lower wedged template 2.
The both sides (wedge angle) of the equicrural ladder plate I 102 be respectively embedded into vee gutter III-I 301 and vee gutter IV-
In II 402 so that the working face I-I 1021 and working face III-I 3021 are slidably matched, the working face I-II 1022 and work
Make face IV-II 4022 to be slidably matched.When being pulled up equicrural ladder plate I 102, left wedged template 3 and right wedged template 4 respectively to
The left and right sides is separated.
The both sides (wedge angle) of the equicrural ladder plate II 202 are respectively embedded into vee gutter III-II 302 and vee gutter
In IV-I 401 so that the working face II-II 2022 is slidably matched with working face III-II 3022, the working face II-I 2021
It is slidably matched with working face IV-I 4021.Downwards during stretching equicrural ladder plate II 202, left 4 points of wedged template 3 and right wedged template
Both sides are not separated to the left and right.
The test specimen to be measured 5 is cross.Four branches of the test specimen to be measured 5 be connected to wedged template 1, under
On wedged template 2, left wedged template 3 and right wedged template 4.
Embodiment 4:
The present embodiment primary structure be the same as Example 1, fixes test specimen 5, the upper wedged template 1, hyposphene for convenience
There is connecting pin I 103, connecting pin II 203, connecting pin III 304 respectively on shape template 2, left wedged template 3 and right wedged template 4
With connecting pin IV 404.Accordingly, be equipped with respectively in four branches of the test specimen to be measured 5 connecting hole I 501, connecting hole II 502,
Connecting hole III 503 and connecting hole IV 504, connecting pin can be embedded in this some holes.
Embodiment 5:
In the present embodiment, device disclosed in many set embodiments 1,2 or 3 is employed, wherein, the He of equicrural ladder plate I 102
The base angle of equicrural ladder plate II 202 is α.The vee gutter III-I 301, vee gutter III-II 302, vee gutter IV-I
401 and the groove angle of vee gutter IV-II 402 be α.α spans are [20 °, 90 °].If α spans are less than 90 °,
The device is the device described in embodiment 2 or 3.
The present embodiment discloses a kind of Forming Limit of Sheet Metals figure method of testing based on the device of embodiment 1, mainly including following
Step:
1) sheet material to be measured is processed as to " ten " font sample as shown in Figure 6, and goes out positioning hole in four end machinings;
2) roundness mess of appropriate size is engraved on sample using chemical attack or other method, is terminated to test
Measuring strain, or the real-time measuring strain in experimentation afterwards;
3) a set of test device is selected, the angle parameter α of the device is, it is known that such as 45 °.By step 1) with 2) processing examination
Sample is assembled with one group of wedge-shaped die using the assembling mode shown in Fig. 1, and upper wedged template 1 and lower wedged template 2 are distinguished
It is connected with cupping machine;
4) after experiment starts, upper wedged template 1 and lower wedged template 2 are driven by cupping machine, produce relative fortune up and down
It is dynamic, and promote left wedged template 3 that the relative motion of left and right directions occurs with right wedged template 4, so as to realize that sample 5 is answered two-way
Deformation under power state.(or, upper wedged template 1 and relative motion above and below the generation of lower wedged template 2, left wedged template 3 and the right side
Wedged template 4 is relatively motionless, realizes the plane strain tension deformation of sample.) when sample cracking, stop experiment;Due to each
Relative motion occurs in approximately the same plane for wedged template, and curving deformation will not occur for sample.
5) sample is removed, the strain of measurement Critical Cracking position obtains a bit on forming limit diagram;
, can be with repeat step 3 in embodiment) -5), in step 3) and the middle test device from different angle parameter α, until
Draw the forming limit diagram of a complete right half part.
Embodiment result shows that test device of the invention can be realized two-way on the premise of ensureing that sample is flat shape
Deformation under stress state, thus avoid traditional expanding method cause sample it is curving caused by strain measurement is inaccurate asks
Topic.Forming limit diagram test device of the present invention is simple in construction, and manufacture processing cost is low and simple easy to process.Present invention shaping pole
Limit figure test device has a wide range of application, and is not limited, shown using result by sheet metal thickness, for sheet metal thickness 0.5mm~
Sample within 3mm, as a result most preferably.
Claims (4)
1. a kind of Forming Limit of Sheet Metals figure test device, it is characterised in that:Including the upper wedge-shaped die for installing test specimen to be measured (5)
Plate (1), lower wedged template (2), left wedged template (3) and right wedged template (4);
The upper wedged template (1), lower wedged template (2), left wedged template (3) and right wedged template (4) are combined;
The lower surface of upper wedged template (1) is that plane, the upper surface of lower wedged template (2) are plane;
The upper wedged template (1) each side has a working face, the two working faces and upper wedged template (1)
The angle of lower surface be α;
The lower wedged template (2) each side has a working face, the two working faces and lower wedged template (2)
The angle of upper surface be α;
Its right end face of the left wedged template (3) is provided with two triangular grooves;In the two triangular grooves, the groove of triangular groove above
One working face of wall and upper wedged template (1) coordinates, the trough wall surface of triangular groove below and the one of lower wedged template (2)
Individual working face coordinates;
The left end face of the right wedged template (4) is provided with two triangular grooves;In the two triangular grooves, the groove of triangular groove above
One working face of wall and upper wedged template (1) coordinates, the trough wall surface of triangular groove below and the one of lower wedged template (2)
Individual working face coordinates;
The test specimen to be measured (5) is " cross " shape, and its each branch is fixed on wedged template (1), lower wedged template respectively
(2), on left wedged template (3) and right wedged template (4);
The upper wedged template (1) and lower wedged template (2) connection stretching device;
If it is acute angle that angle, which is α, when pulling upper wedged template (1) and lower wedged template (2) up and down respectively, left wedge-shaped die
Plate (3) and right wedged template (4) are moved to the left and right sides respectively;
If it is right angle that angle, which is α, when pulling upper wedged template (1) and lower wedged template (2) up and down respectively, left wedge-shaped die
Plate (3) and right wedged template (4) are not moved;
Have respectively on the upper wedged template (1), lower wedged template (2), left wedged template (3) and right wedged template (4) and connect
Pin I (103), connecting pin II (203), connecting pin III (304) and connecting pin IV (404).
2. a kind of Forming Limit of Sheet Metals figure test device, it is characterised in that:Including the upper wedge-shaped die for installing test specimen to be measured (5)
Plate (1), lower wedged template (2), left wedged template (3) and right wedged template (4);
The upper wedged template (1) is identical with lower wedged template (2) shape;The left wedged template (3) and right wedged template (4)
Shape is identical;
The upper end of the upper wedged template (1) is that connection handle I (101), lower end are equicrural ladder plates I (102);The isosceles trapezoid
Inclined plane on the left of plate I (102) is that working face I-I (1021), the inclined plane on right side are working face I-II (1022);The connection
Handle I (101) is connected with the stretching device I above upper wedged template (1);
The lower end of the lower wedged template (2) is that connection handle II (201), upper end are equicrural ladder plates II (202);The isosceles ladder
Inclined plane on the left of shape plate II (202) is that working face II-II (2022), the inclined plane on right side are working face II-I (2021);Institute
Connection handle II (201) is stated to be connected with the stretching device II above lower wedged template (2);
Vee gutter III-I (301) and vee gutter III-II (302) are provided with the right side of the left wedged template (3);The triangle
Entity part between shape groove III-I (301) and vee gutter III-II (302) is rectangular slab III (303);The vee gutter
The inclined plane of III-I (301) upper end is working face III-I (3021);The inclined plane of described (302) lower end of vee gutter III-II is
Working face III-II (3022);
Vee gutter IV-II (402) and vee gutter IV-I (401) are provided with the left of the right wedged template (4);The triangle
Entity part between shape groove IV-I (401) and vee gutter IV-II (402) is rectangular slab IV (403);The vee gutter
The inclined plane of IV-II (402) upper end is working face IV-II (4022);The inclined plane of described (401) lower end of vee gutter IV-I is
Working face IV-I (4021);
It is lower wedged template (2) below the upper wedged template (1);The left wedged template (3) is located at upper wedged template (1)
With the left side of lower wedged template (2);The right wedged template (4) is located at the right side of upper wedged template (1) and lower wedged template (2)
Side;
The both sides of the equicrural ladder plate I (102) are respectively embedded into vee gutter III-I (301) and vee gutter IV-II (402)
In so that working face I-I (1021) is contacted with working face III-I (3021), working face I-II (1022) and working face IV-II
(4022) contact;
The both sides of the equicrural ladder plate II (202) are respectively embedded into vee gutter III-II (302) and vee gutter IV-I (401)
In so that working face II-II (2022) is contacted with working face III-II (3022), working face II-I (2021) and working face IV-I
(4021) contact;
The test specimen to be measured (5) is cross;Each branch of the test specimen to be measured (5) be connected to wedged template (1),
On lower wedged template (2), left wedged template (3) and right wedged template (4).
3. a kind of Forming Limit of Sheet Metals figure test device according to claim 2, it is characterised in that:The equicrural ladder plate
I (102) and the base angle of equicrural ladder plate II (202) are α;The vee gutter III-I (301), vee gutter III-II
(302), the groove angle of vee gutter IV-I (401) and vee gutter IV-II (402) is α.
4. a kind of Forming Limit of Sheet Metals figure method of testing using 1~3 any claim described device.
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CN105758722B (en) * | 2016-02-26 | 2019-05-17 | 重庆大学 | A kind of easy, the adjustable Dual-shaft synchronous stretching device of stretch ratio and method |
CN110658060A (en) * | 2019-09-06 | 2020-01-07 | 扬州大学 | System and method for observing evolution of tensile microscopic morphology of concrete fiber |
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SU1415124A1 (en) * | 1986-12-15 | 1988-08-07 | Ленинградский инженерно-строительный институт | Installation for two-axes tension of cross-shaped specimens made of composite materials |
DE3914966C2 (en) * | 1989-05-03 | 1996-01-11 | Inpro Innovations Gmbh | Cross-shaped, flat sample, especially made of sheet metal for a two-axis material test in the area of high elongation |
CN102507320B (en) * | 2011-10-25 | 2014-04-02 | 华南理工大学 | Single-power two-way stretching method and device |
CN102645371B (en) * | 2012-04-12 | 2015-11-11 | 北方工业大学 | Biaxial material tensile test and apply the method for this device |
CN204255762U (en) * | 2014-09-26 | 2015-04-08 | 重庆大学 | A kind of For The Forming Limit of Sheet Metals figure proving installation |
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