CN201047825Y - Sample for metal sheet shear stress cockling experimentation - Google Patents
Sample for metal sheet shear stress cockling experimentation Download PDFInfo
- Publication number
- CN201047825Y CN201047825Y CNU2007200703623U CN200720070362U CN201047825Y CN 201047825 Y CN201047825 Y CN 201047825Y CN U2007200703623 U CNU2007200703623 U CN U2007200703623U CN 200720070362 U CN200720070362 U CN 200720070362U CN 201047825 Y CN201047825 Y CN 201047825Y
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- shear stress
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- flanging
- tensile
- wrinkling
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Abstract
The utility model relates to a sheet metal stress experiment used sample, in particular to a sheet metal shearing stress corrugation experiment used sample including semi-finished product and finished product; wherein, the roughcast is made into the finished product after margin pressure muscle and being bent. In a plane, the roughcast consists of a tensile section, four shearing stress corrugation sections and four margin pressure sections; wherein, the four margin pressure sections are positioned in the four corners of the tensile section and distributed as axial symmetry. Besides, the four shearing stress corrugation sections are arranged between the four margin pressure sections and the tensile section. The roughcast is dumbbell-shaped; one side of the margin pressure section extends towards the shearing stress corrugation section and is provided with a hypothesis strength guidance cut; the margin pressure section and the tensile section are in stress disalignment. In addition, the tensile section of the roughcast is arranged above, and the four border pressure areas are arranged below. The shearing stress corrugation area is positioned between the tensile area and the border pressure areas and assumes an oblique plane. The utility model has the advantages of simple structure, can carry sheet metal shearing stress corrugation test on the existing tensile tester.
Description
Technical field
The utility model relates to sheet metal stress test sample, relates in particular to the sheet metal shear stress creping test sample.
Background technology
In the sheet metal punching course, as: in the auto parts punching course, wrinkling is the quality problems that often occur.According to wrinkling district external force condition difference, wrinklingly mainly contain three kinds of forms of expression: wrinkling, the inhomogeneous tension of compressive stress is wrinkling and shear stress is wrinkling, referring to Fig. 1.
When the steel plate drawing, the blank of die inside is under the pulling force and is shaped, because the structure of stamping parts is complicated, causes the stressed also complicated of blank, when pulling force disalignment balance that blank is subjected to, then can produce shear stress in blank, as shown in Figure 2.According to mechanics ABC as can be known, biggest principal stress direction and shear stress angle at 45, promptly in the Y1 direction, and σ
Y1＞0; Least principal stress is inevitable in the X1 direction, and σ
X1＜0.Be that the stress that material is subjected in the X1 direction is compressive stress, when this compression stress ot
X1When reaching certain value, plate will produce the pressurized unstable phenomenon, and the length direction of its wrinkle is in the Y1 direction.The wrinkling principle of shear stress that Here it is.
At present both at home and abroad to wrinkling existing many researchs of wrinkling, the inhomogeneous tension of compressive stress and corresponding simulation experiment method, the wrinkling test in flange distortion district when stretching as the cylindrical component of compressive stress, the square plate diagonal stretch test of inhomogeneous tension etc., but to the wrinkling Test Research of shear stress also seldom, also not corresponding test sample.
The utility model content
The purpose of this utility model is to provide a kind of sheet metal shear stress creping test sample, and this sample structure is simple, can be at the enterprising row metal thin plate of existing cupping machine shear stress creping test.
The utility model is achieved in that a kind of sheet metal shear stress creping test sample, it is characterized in that: comprise blank and finished product, blank becomes finished product after flanging muscle and bending; Blank is made up of the wrinkling district of tensile region, shear stress, the flanging district in a plane, tensile region is one, and the flanging district is for being four, and four flanging districts are positioned at four jiaos of the tensile regions and the distribution that is centrosymmetric, between four flanging districts and the tensile region four wrinkling districts of shear stress are arranged, blank is dumbbell shaped; Have setting power pilot notched to the wrinkling district of shear stress extended spot on one side in the flanging district; The stressed disalignment of flanging district and tensile region; The tensile region of finished product is positioned at the top, and four flanging districts are positioned at the below, and the wrinkling district of shear stress is positioned between tensile region and the flanging district and is tapered plane.
Described tensile region, the wrinkling district of shear stress, flanging district are made up of rectangle or square.
The plane of described shear stress corrugated side becomes the obtuse angle with the tensile region plane that is positioned at the top; Its preferable angle is 104 degree.
Described pressure zone has the beading convex surface, and beading convex surface center line is perpendicular with the power of setting pilot notched.
Sheet metal sample principle of work of the present utility model designs according to the wrinkling principle of shear stress, sample produces pulling force by the corresponding mould action in the pressure zone, thereby generation shear stress, and shear stress produces wrinkling thus, thereby measure the shearing stress characteristic of sheet metal, satisfy scientific research, the needs of user's technical support.
Sample structure of the present utility model is simple, can be at the enterprising row metal thin plate of existing cupping machine shear stress creping test, and the test findings good reproducibility is suitable for studying the wrinkling characteristic of shear stress of sheet metal.
Description of drawings
Fig. 1 is a sheet material corrugated form synoptic diagram, and wherein: (a) compressive stress is wrinkling, and (b) inhomogeneous tension is wrinkling, and (c) shear stress is wrinkling;
Fig. 2 is the wrinkling principle schematic of shear stress;
Fig. 3 is subjected to the synoptic diagram of disalignment balance pulling force for blank;
Fig. 4 is the blank synoptic diagram of the utility model sheet metal shear stress creping test with sample;
Fig. 5 is a synoptic diagram after wrinkling test of the present utility model is shaped with sample;
Fig. 6 is the vertical view of Fig. 5.
Among the figure: 1 flanging district, the wrinkling district of 2 shear stress, 3 tensile regions, 4 set power pilot notched, 5 beading convex surfaces.The plane of A shear stress corrugated side and above the tensile region plane between angle, B is wrinkling.
Embodiment
The utility model is described in further detail below in conjunction with the drawings and specific embodiments.
Referring to Fig. 4, Fig. 5, Fig. 6, a kind of sheet metal shear stress creping test sample comprises blank and finished product, and blank becomes finished product after flanging muscle and bending.
Referring to Fig. 4, blank is made up of the wrinkling district 2 of tensile region 3, shear stress in a plane, flanging district 1, tensile region 3 is one, flanging district 1 is four, four flanging districts 1 are positioned at 3 four jiaos of the tensile regions and the distribution that is centrosymmetric, between four flanging districts 1 and the tensile region 3 four wrinkling districts 2 of shear stress are arranged, tensile region 3, the wrinkling district 2 of shear stress, flanging district 1 are made up of rectangle or square.Blank is dumbbell shaped, is zhou duicheng tuxing.1 has setting power pilot notched 4 to the wrinkling district of shear stress 2 extended spots on one side in the flanging district, and setting power can be controlled through corresponding mould by drawing machine; Flanging district 1 and tensile region 3 stressed disalignments.
Referring to Fig. 5, Fig. 6, the tensile region 3 of the finished product of sample is positioned at the top, and four flanging districts 1 are positioned at the below, and the wrinkling district 2 of shear stress is between tensile region 3 and flanging district 1 and be tapered plane.The plane of shear stress corrugated side 2 with above tensile region 3 planes between included angle A become the obtuse angle, preferable included angle A be 104 the degree.Pressure zone 1 has beading convex surface 5, and beading convex surface 5 center lines are perpendicular with the power of setting pilot notched 4.
Sheet metal shear stress creping test with the operating process of sample is: with the rectangle sample by line cutting make be about, the original blank sample that is symmetrically distributed up and down, blank directions X (vertical direction) and Y direction (horizontal direction) symmetrical center line need line in advance, centering when stretching with the realization blank, and mark four sweeps in advance, to realize follow-up accurate bending.According to corresponding beading mould, the flanging district 1 to the blank sample on cupping machine carries out beading, and the position has the mould postioning abutment to determine.According to corresponding Bending Mould, on cupping machine, the sample of beading is carried out bending, the position has the sweep of prior delimitation to determine.
The utility model sheet metal shear stress creping test designs according to the wrinkling principle of shear stress with the principle of work of sample.Shear stress is wrinkling be blank after being subjected to disalignment balance pulling force, in certain zone, produce shear stress and cause wrinkling.Sheet metal sample of the present utility model produces pulling force by the corresponding mould action in the flanging district, thereby produces shear stress, and the shear stress generation is wrinkling thus, referring to Fig. 3.Sample of the present utility model is subjected to the effect of disalignment balance pulling force, can produce shear stress in shadow region shown in Figure 3, along with the increase of pulling force, the shear stress that pulling force brought out also increases, when shear stress increases to a certain degree, will produce wrinkling B, thereby reach test effect.
The results showed that sample of the present utility model can bring out the shear stress state, produce the shear stress wrinkling; Adopt symmetrical sample and be equipped with symmetrical mold, not only can make sample both sides load equalization, avoid because of unbalance loading cause wrinkling inhomogeneous, and respectively there are two wrinkling zones on the sample both sides, can test simultaneously and average, can eliminate the error that other factors causes, guarantee measuring accuracy.
Claims (5)
1. sheet metal shear stress creping test sample, it is characterized in that: comprise blank and finished product, blank becomes finished product after flanging muscle and bending; Blank is made up of the wrinkling district of tensile region, shear stress, the flanging district in a plane, tensile region is one, and the flanging district is for being four, and four flanging districts are positioned at four jiaos of the tensile regions and the distribution that is centrosymmetric, between four flanging districts and the tensile region four wrinkling districts of shear stress are arranged, blank is dumbbell shaped; Have setting power pilot notched to the wrinkling district of shear stress extended spot on one side in the flanging district; The stressed disalignment of flanging district and tensile region; The tensile region of finished product is positioned at the top, and four flanging districts are positioned at the below, and the wrinkling district of shear stress is positioned between tensile region and the flanging district and is tapered plane.
2. sheet metal shear stress creping test sample according to claim 1 is characterized in that: tensile region, the wrinkling district of shear stress, flanging district are made up of rectangle or square.
3. sheet metal shear stress creping test sample according to claim 1 and 2 is characterized in that: the plane of shear stress corrugated side becomes the obtuse angle with the tensile region plane that is positioned at the top.
4. sheet metal shear stress creping test sample according to claim 3 is characterized in that: the plane of shear stress corrugated side becomes 104 degree with the tensile region plane that is positioned at the top.
5. sheet metal shear stress creping test sample according to claim 1 is characterized in that: the pressure zone has the beading convex surface, and beading convex surface center line is perpendicular with the power of setting pilot notched.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200703623U CN201047825Y (en) | 2007-05-29 | 2007-05-29 | Sample for metal sheet shear stress cockling experimentation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200703623U CN201047825Y (en) | 2007-05-29 | 2007-05-29 | Sample for metal sheet shear stress cockling experimentation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201047825Y true CN201047825Y (en) | 2008-04-16 |
Family
ID=39300413
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200703623U Expired - Fee Related CN201047825Y (en) | 2007-05-29 | 2007-05-29 | Sample for metal sheet shear stress cockling experimentation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201047825Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101363785B (en) * | 2007-08-10 | 2010-12-01 | 宝山钢铁股份有限公司 | Sheet metal shear stress creping test method and test device |
| CN112858005A (en) * | 2021-02-07 | 2021-05-28 | 燕山大学 | Metal plate shear stress wrinkling device and wrinkling instability characteristic measuring method thereof |
-
2007
- 2007-05-29 CN CNU2007200703623U patent/CN201047825Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101363785B (en) * | 2007-08-10 | 2010-12-01 | 宝山钢铁股份有限公司 | Sheet metal shear stress creping test method and test device |
| CN112858005A (en) * | 2021-02-07 | 2021-05-28 | 燕山大学 | Metal plate shear stress wrinkling device and wrinkling instability characteristic measuring method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080416 Termination date: 20130529 |