CN110068500A - A kind of limit attenuating rate mechanism for testing - Google Patents
A kind of limit attenuating rate mechanism for testing Download PDFInfo
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- CN110068500A CN110068500A CN201910306569.3A CN201910306569A CN110068500A CN 110068500 A CN110068500 A CN 110068500A CN 201910306569 A CN201910306569 A CN 201910306569A CN 110068500 A CN110068500 A CN 110068500A
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- China
- Prior art keywords
- formed punch
- segment
- attenuating rate
- testing
- aperture
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
-
- 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
-
- 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
- G01N2203/0001—Type of application of the stress
- G01N2203/0003—Steady
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0058—Kind of property studied
- G01N2203/006—Crack, flaws, fracture or rupture
- G01N2203/0067—Fracture or rupture
-
- 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)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses a kind of limit attenuating rate mechanism for testing, the pedestal including formed punch and for placing tested sample, and the upper grip connection of the formed punch and universal testing machine, the pedestal is arranged on the work top of the universal testing machine.The limit attenuating rate mechanism for testing structure is simple, can directly test the limit attenuating rate of tested sample, and test result is accurate, has important directive significance to the research and development of stamping products.
Description
Technical field
The present invention relates to material properties test technical fields, and in particular to a kind of limit attenuating rate mechanism for testing.
Background technique
During punch forming, stamping parts stress deformation, due to the Factors on Mechanical Properties of stamping parts, if stamping parts is thinned
More, then stamping parts is easy to produce crackle, tests the limit attenuating rate of stamping parts, can assess the cracking risk of stamping parts,
It is provided safeguard for stamping parts molding.
The limit attenuating rate Primary Reference punching press reduction judgment criteria assessment of stamping parts or theoretical calculation obtain at present.
According to criterion evaluation, accuracy is lower.By theoretical calculation, influence factor is more, cannot guarantee that the accuracy of calculated result.
Summary of the invention
The purpose of the present invention is being directed to the problems of the prior art, a kind of limit attenuating rate mechanism for testing is provided.
In order to achieve the above objectives, the technical solution adopted by the present invention is that:
A kind of limit attenuating rate mechanism for testing, the pedestal including formed punch and for placing tested sample, the formed punch and omnipotent examination
The upper grip connection of machine is tested, the pedestal is arranged on the work top of the universal testing machine.
Preferably, the pedestal includes pressing mold, pad mould and bottom support component, the tested sample be clamped in the pressing mold and
Between the pad mould, the pressing mold is located at the top of the pad mould, and the bottom support component is supported on the lower section of the pad mould, institute
It states bottom support component to be fixed on the work top of the universal testing machine, when being provided with test in the bottom support component
Accommodate the accommodation space of the formed punch.
Further, the limit being defined for the position to the tested sample is provided on the upper surface of the pad mould
Position portion, the thickness of the limiting section are less than the thickness of the tested sample.
Further, the first aperture through its upper and lower end faces is provided in the middle part of the pressing mold, in the pad mould
Portion is provided with the second aperture through its upper and lower end faces, first aperture, second aperture and the formed punch center
Axis extends along same rectilinear direction, and the diameter of first aperture and second aperture is all larger than the diameter of the formed punch.
Further, second aperture includes first segment and second segment, and the first segment is located at the second segment
Top, the lower part of the first segment connect with the top of the second segment, the first segment be straight hole, the second segment on to
Lower diameter is gradually increased.
Further, the bottom support component includes multiple supporting legs and lower plate, the upper end of multiple supporting legs
It is fixed at the bottom of the pad mould, the lower end of multiple supporting legs is fixed on the lower plate, institute
It states lower plate to be arranged on the work top of the universal testing machine, the space that the inside of each supporting leg is surrounded is formed
The accommodation space of the formed punch is accommodated when test.
Preferably, the mechanism for testing further includes upper plate, and the formed punch is arranged on the upper plate, the upper plate
It is fixedly connected with the upper grip of the universal testing machine.
Further, the formed punch is removably disposed on the upper plate.
Preferably, the working surface of the formed punch is spherical shape.
Preferably, the roughness of the working surface of the formed punch is not more than Ra0.4um, and Vickers hardness is at least 750HV30.
Due to the application of the above technical scheme, compared with the prior art, the invention has the following advantages: the limit of the invention
Reduction mechanism for testing structure is simple, can directly test the limit attenuating rate of tested sample, and test result is accurate, right
The research and development of stamping products have important directive significance.
Detailed description of the invention
Attached drawing 1 is the perspective view of limit attenuating rate mechanism for testing of the invention；
Attached drawing 2 is the front view of limit attenuating rate mechanism for testing of the invention.
Specific embodiment
The technical solution of the present invention will be further described below with reference to the accompanying drawings.
As depicted in figs. 1 and 2, limit attenuating rate mechanism for testing of the invention includes formed punch 1 and pedestal, and pedestal is for placing
Tested sample, pedestal are fixed on the work top of universal testing machine (not shown), and formed punch 1 is used for tested sample
Punching press is carried out, formed punch 1 is arranged on the upper grip of universal testing machine.
Specifically, the mechanism for testing further includes upper plate 2, formed punch 1 is arranged on upper plate 2, upper plate 2 and universal test
The upper grip of machine is fixedly connected.It is preferred that formed punch 1 and upper plate 2 are mutually detachably connected, in this way, sending out through test of many times formed punch 1
It, can be only with changing formed punch 1, to can avoid waste, save the cost after raw damage.
Working surface, that is, lower end surface of formed punch 1 is spherical shape, and polished, and surface roughness is not more than Ra0.4um, and
The working surface need to have enough rigidity, and Vickers hardness is at least 750HV30.
Pedestal includes pressing mold 3, pad mould 4 and bottom support component 5, and pressing mold 3 and pad mould 4 are bolted, so as to test sample
Part can be clamped between pressing mold 3 and pad mould 4, and bottom support component 5 is supported on the bottom of pad mould 4, and the fixation of bottom support component 5 is set
It sets on the work top of universal testing machine, the accommodation space for accommodating formed punch 1 when test is provided in bottom support component 5.
It is provided with the limiting section being defined for the position to tested sample on pad mould 4, the thickness of limiting section need to be less than
The thickness of tested sample, in this way, tested sample can be just pressed on pad mould 4 by pressing mold 3.
In the present embodiment, limiting section is the deep gouge being arranged on the upper surface of pad mould 4, and tested sample is fastened on the deep gouge
In, and the upper surface of tested sample is higher than the upper surface of pad mould 4.
The middle part of pressing mold 3 is provided with the first aperture 31 through its upper and lower end faces, and the middle part of pad mould 4 is provided with through it
Second aperture 41 of upper and lower end faces, the central axis of the first aperture 31, the second aperture 41 and formed punch 1 prolong along same rectilinear direction
It stretches, the diameter of the first aperture 31 is greater than the diameter of the second aperture 41, and the diameter of the first aperture 31 and the second aperture 41 is all larger than punching
First 1 diameter.
Second aperture 41 includes first segment 411 and second segment 412, and first segment 411 is located at the top of second segment 412, and first
The lower part of section 411 connects with the top of second segment 412, and first segment 411 is straight hole, and diameter gradually increases second segment 412 from the top down
Greatly.In this way, tested sample is by after 1 punching press of formed punch, downwards along first segment 411, the side wall of first segment 411 is working surface, table
Surface roughness is not more than Ra0.4um, and the working surface need to have enough rigidity, and Vickers hardness is at least 750HV30.The
Two section 412 of side wall is inactive face, sets the pyramidal structure that inner hole from the top down is gradually increased for second segment 412, can
The side wall of second segment 412 is avoided to contact with tested sample surface, so as to reduce friction, to reduce in 1 punching course of formed punch
Resistance.
Bottom support component 5 includes multiple supporting legs 51 and lower plate 52, and the upper end of multiple supporting legs 51 is fixedly installed
In the bottom of pad mould 4, the lower end of multiple supporting legs 51 is fixed on lower plate 52, and lower plate 52 is arranged in omnipotent examination
It tests on the work top of machine, the space that the inside of each supporting leg 51 is surrounded forms the accommodation space that formed punch 1 is accommodated when test.
In the present embodiment, there are four the settings of supporting leg 51.
Test process when carrying out limit attenuating rate test to tested sample using the mechanism for testing is as follows:
(1) before punch test, the thickness of tested sample is measured；
(2) tested sample is placed in the limiting section on pad mould 4, pressing mold 3 is locked on pad mould 4 by bolt, thus will
Tested sample is clamped between pressing mold 3 and pad mould 4；
(3) mechanism for testing is mounted on universal testing machine: upper plate 2 is connect with the upper grip of universal testing machine, will be gone to the bottom
Plate 52 is connect with the work top of universal testing machine；
(4) punching press: the constant speed of 5mm/min, downward punching press tested sample being arranged to formed punch 1, and formed punch 1 passes through the first aperture 31
It acts on tested sample, 1 Continued downward motion of formed punch, until tested sample cracks, stops punching press immediately；
(5) thickness at tested sample cracking is measured；
(6) limit attenuating rate of tested sample, calculation formula are as follows: limit attenuating rate are calculated。
According to process as above, the test of the limit attenuating rate of tested sample can be completed, mechanism for testing and test method are equal
Simply, easy to operate, which can also test the limit attenuating rate of different tested samples, and applicability is wide, and
The test result of the limit attenuating rate of the tested sample obtained by the mechanism for testing is accurate, has weight to the research and development of stamping products
The directive significance wanted.
The above embodiments merely illustrate the technical concept and features of the present invention, and its object is to allow person skilled in the art
Scholar can understand the contents of the present invention and be implemented, and it is not intended to limit the scope of the present invention, it is all according to the present invention
Equivalent change or modification made by Spirit Essence, should be covered by the scope of protection of the present invention.
Claims (10)
1. a kind of limit attenuating rate mechanism for testing, it is characterised in that: the pedestal including formed punch and for placing tested sample, it is described
The connection of the upper grip of formed punch and universal testing machine, the pedestal are arranged on the work top of the universal testing machine.
2. limit attenuating rate mechanism for testing according to claim 1, it is characterised in that: the pedestal includes pressing mold, pad mould
With bottom support component, the tested sample is clamped between the pressing mold and the pad mould, and the pressing mold is located at the pad mould
Top, the bottom support component are supported on the lower section of the pad mould, and the bottom support component is fixed at the universal test
On the work top of machine, the accommodation space that the formed punch is accommodated when test is provided in the bottom support component.
3. limit attenuating rate mechanism for testing according to claim 2, it is characterised in that: be arranged on the upper surface of the pad mould
There is the limiting section being defined for the position to the tested sample, the thickness of the limiting section is less than the tested sample
Thickness.
4. limit attenuating rate mechanism for testing according to claim 2, it is characterised in that: be provided with and pass through in the middle part of the pressing mold
The first aperture of its upper and lower end faces is worn, the second aperture through its upper and lower end faces is provided in the middle part of the pad mould, it is described
The central axis of first aperture, second aperture and the formed punch extends along same rectilinear direction, first aperture and institute
The diameter for stating the second aperture is all larger than the diameter of the formed punch.
5. limit attenuating rate mechanism for testing according to claim 4, it is characterised in that: second aperture includes first segment
And second segment, the first segment are located at the top of the second segment, the top phase of the lower part of the first segment and the second segment
It connects, the first segment is straight hole, and diameter is gradually increased the second segment from the top down.
6. limit attenuating rate mechanism for testing according to claim 2, it is characterised in that: the bottom support component includes multiple
Supporting leg and lower plate, the upper end of multiple supporting legs are fixed at the bottom of the pad mould, multiple supports
The lower end of leg is fixed on the lower plate, and the work top of the universal testing machine is arranged in the lower plate
On, the space that the inside of each supporting leg is surrounded forms the accommodation space that the formed punch is accommodated when test.
7. limit attenuating rate mechanism for testing according to claim 1, it is characterised in that: the mechanism for testing further includes upper bottom
Plate, the formed punch are arranged on the upper plate, and the upper plate is fixedly connected with the upper grip of the universal testing machine.
8. limit attenuating rate mechanism for testing according to claim 7, it is characterised in that: the formed punch is removably disposed in
On the upper plate.
9. limit attenuating rate mechanism for testing according to claim 1, it is characterised in that: the working surface of the formed punch is ball
Shape.
10. limit attenuating rate mechanism for testing according to claim 1, it is characterised in that: the working surface of the formed punch
Roughness is not more than Ra0.4um, and Vickers hardness is at least 750HV30.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910306569.3A CN110068500A (en) | 2019-04-17 | 2019-04-17 | A kind of limit attenuating rate mechanism for testing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910306569.3A CN110068500A (en) | 2019-04-17 | 2019-04-17 | A kind of limit attenuating rate mechanism for testing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110068500A true CN110068500A (en) | 2019-07-30 |
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ID=67367865
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910306569.3A Pending CN110068500A (en) | 2019-04-17 | 2019-04-17 | A kind of limit attenuating rate mechanism for testing |
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| Country | Link |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002137021A (en) * | 2000-10-30 | 2002-05-14 | Takagi Seisakusho:Kk | Method and machine for forming cup-shaped metal parts |
| JP2005292005A (en) * | 2004-04-01 | 2005-10-20 | Toyota Central Res & Dev Lab Inc | Damage evaluation testing method and damage evaluation testing apparatus in ironing |
| CN103175745A (en) * | 2011-12-22 | 2013-06-26 | 宝山钢铁股份有限公司 | Device and method for estimating spin forming limits of high-strength steel and tailor-welded blank |
| CN203337466U (en) * | 2013-07-31 | 2013-12-11 | 济南联工测试技术有限公司 | Cup drawing auxiliary appliance for electronic universal testing machine |
| CN104237015A (en) * | 2014-10-17 | 2014-12-24 | 清华大学苏州汽车研究院 | High-speed dynamic compression testing device |
| CN107127274A (en) * | 2016-02-29 | 2017-09-05 | 鞍钢股份有限公司 | A kind of stamping parts of automobile reduction assay method |
-
2019
- 2019-04-17 CN CN201910306569.3A patent/CN110068500A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002137021A (en) * | 2000-10-30 | 2002-05-14 | Takagi Seisakusho:Kk | Method and machine for forming cup-shaped metal parts |
| JP2005292005A (en) * | 2004-04-01 | 2005-10-20 | Toyota Central Res & Dev Lab Inc | Damage evaluation testing method and damage evaluation testing apparatus in ironing |
| CN103175745A (en) * | 2011-12-22 | 2013-06-26 | 宝山钢铁股份有限公司 | Device and method for estimating spin forming limits of high-strength steel and tailor-welded blank |
| CN203337466U (en) * | 2013-07-31 | 2013-12-11 | 济南联工测试技术有限公司 | Cup drawing auxiliary appliance for electronic universal testing machine |
| CN104237015A (en) * | 2014-10-17 | 2014-12-24 | 清华大学苏州汽车研究院 | High-speed dynamic compression testing device |
| CN107127274A (en) * | 2016-02-29 | 2017-09-05 | 鞍钢股份有限公司 | A kind of stamping parts of automobile reduction assay method |
Non-Patent Citations (1)
| Title |
|---|
| 卢长城;: "新型杯突试验夹具在万能试验机上的应用", 试验技术与试验机, no. 03, pages 35 - 37 * |
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