CN107515152A - Suitable for the clamp system of universal testing machine test for tensile strength - Google Patents
Suitable for the clamp system of universal testing machine test for tensile strength Download PDFInfo
- Publication number
- CN107515152A CN107515152A CN201710660509.2A CN201710660509A CN107515152A CN 107515152 A CN107515152 A CN 107515152A CN 201710660509 A CN201710660509 A CN 201710660509A CN 107515152 A CN107515152 A CN 107515152A
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- Prior art keywords
- wedge
- clamping plate
- bayonet socket
- shaped
- shaped clamping
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
- G01N3/04—Chucks
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
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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 the clamp system suitable for universal testing machine test for tensile strength, including clamp, wedge-shaped clamping plate is provided with clamp opening, side of the wedge-shaped clamping plate away from clamp is provided with inner fovea part, wedge-shaped bayonet socket is provided with its inner fovea part, the wedged gap α of wedge-shaped bayonet socket is less than the wedge grip angle beta of wedge-shaped clamping plate, and push rod is provided with above wedge-shaped clamping plate；Wedge-shaped bayonet socket is provided with male part, its male part and the inner fovea part halved joint of wedge-shaped clamping plate, the inner fovea part of wedge-shaped clamping plate is provided at both ends with mounting groove, there is the through hole of coaxial different-diameter at wedge-shaped bayonet socket male part both ends, guide rod and spring are respectively provided with through hole, guide rod is inserted in the mounting groove of the inner fovea part of wedge-shaped clamping plate, and wedge-shaped bayonet socket can slide along guide rod.The wedge-shaped clamping plate of the present invention has that the larger amount of expansion scope of application is wider, and test specimen is easier to be loaded and dismantled, and when being clamped to test specimen, bayonet socket amount of expansion is small, and self-locking performance is strong, and test specimen is easily clamped lock jail.
Description
Technical field
The present invention relates to clamp system, and in particular to suitable for the clamp system of universal testing machine test for tensile strength.
Background technology
Universal testing machine, integrate the Material Testing Machine of the functions such as stretching, bending, compression, shearing, ring stiffness, mainly
It is industrial and mining enterprises, R＆D institution, universities and colleges, engineering quality supervision station etc. for metal, nonmetallic materials mechanical property test
The preferable detection device of department.Universal testing machine is also universal testing machine, or puller system, double lead series, control, surveys
Amount, operation integral structure, melt contemporary advanced in one, there is precision height, speed-regulating range width, compact-sized, operation side
Just, steady performance.Suitable for the drawing of the material samples such as plastics, waterproof material, textile, paper products and rubber and product
Stretch, compress, bending, creep test and can directly to carry out the flat compression (compression recovery) of tubing, ring stiffness equipped with big platen (anti-outer
Load), creep ratio, the experiment such as ring tensile strength.
Universal testing machine is the product that modern electronic technology is combined with mechanical transmissioning technology, be given full play to it is electromechanical each
The large-scale precision tester formed from speciality, various materials can be stretched, compress, bend, peeling off, shearing etc. and be multinomial
Performance test, and have the features such as measurement range is wide, precision is high, response is fast.Reliable operation, efficiency high, test data can be carried out
Real-time display record, printing.Universal testing machine is by measuring system, drive system, control system and computer (computer system
Type tensile testing machine) etc. structure composition.If existing universal testing machine on the market can be divided into measure machinery according to purpose classification
The testing machine and engineer testing testing machine of performance, universal testing machine engineer testing testing machine, can carry out force measurement, i.e.,
Measurement is realized by force cell, amplifier and data handling system, the most frequently used force cell is that strain chip passes
Sensor.
Tensile strength be characterize material maximum uniform plastic deformation drag, tensile sample bear maximum tension stress it
Before, deformation is uniformity, but after exceeding, metal starts necking occur, that is, produces and concentrate deformation；For not having
The fragile material of (or very little) uniform plastic deformation, it reflects the fracture resistance of material.Tensile test, for studying measure gold
Belong to the important method of mechanical property, electron type automation tensile testing machine obtains widely used.Tensile test, generally refer to stretch
Experiment, tension test can determine a series of intensity indexs and plasticity index of material.Intensity typically refers to material and used in outer masterpiece
Lower resistance produces elastic deformation, plastic deformation and the ability of fracture.Plasticity refers to that metal material produces plasticity under load effect
The ability that deforms and will not destroy, conventional plasticity index is elongation percentage and the contraction percentage of area.
Existing universal testing machine, the chuck applied are generally templin chuck, templin chuck during tensile test specimen,
Always clamped and relaxed along a wedged gap, if wedged gap takes higher value, bayonet socket amount of expansion is big, test specimen
Easily it is loaded and dismantles, but poor in self, test specimen is clamped, bayonet socket tooth should then pay larger cutting force, such bayonet socket
The phenomenon for occurring skidding or collapsing tooth, and bayonet socket decline are easy for, if wedged gap takes smaller value, although bayonet socket amount of expansion
It is small, but chuck self-locking performance is strong, and test specimen is easily clamped lock jail, particularly easily non-ferrous metal test specimen and soft test specimen clamped
Lock jail, however, hold it is tighter, lock more firm, test specimen residuum dismounting it is more difficult.In consideration of it, some testing machines use hydraulic wedge
Clevis head, this could not only tackle the problem at its root, and occur the hydraulic jack easily new contradiction of leakage or permeability often on the contrary, make
Experiment is affected.
The content of the invention
The technical problems to be solved by the invention are that existing universal testing machine templin chuck is along a wedged gap
Clamped and relaxed, the phenomenon for skidding or collapsing tooth easily occur, and it is an object of the present invention to provide strong suitable for universal testing machine tension
The clamp system of experiment is spent, is solved the above problems.
The present invention is achieved through the following technical solutions：
Suitable for the clamp system of universal testing machine test for tensile strength, including clamp, clamp is provided with wedge-like opening, wedge
Wedge-shaped clamping plate is provided with shape opening, side of the wedge-shaped clamping plate away from clamp is provided with inner fovea part, wedge is provided with its inner fovea part
Shape bayonet socket, the wedged gap α of wedge-shaped bayonet socket are less than the wedge grip angle beta of wedge-shaped clamping plate, push rod are provided with above wedge-shaped clamping plate；Wedge shape
Bayonet socket is provided with male part, its male part and the inner fovea part halved joint of wedge-shaped clamping plate, and wedge-shaped bayonet socket male part size is small
In the inner fovea part size of wedge-shaped clamping plate, the inner fovea part of wedge-shaped clamping plate is provided at both ends with mounting groove, and wedge-shaped bayonet socket male part both ends have
The through hole of coaxial different-diameter, guide rod and spring is respectively provided with through hole, guide rod inserts the peace of the inner fovea part of wedge-shaped clamping plate
In tankage, and wedge-shaped bayonet socket can slide along guide rod, and under the action of the spring, guide rod is by wedge-shaped bayonet socket top to sufficiently high
Degree, with the upper and lower in-migration pulling of push rod, along β, angularly upper both sides are opened, downward both sides close up with pressing wedge-shaped clamping plate, realize wedge
Clamping and absent-mindedness of the shape bayonet socket to test specimen.
Further, the joint of the wedge-shaped clamping plate and wedge-shaped bayonet socket is provided with pressing plate, and pressing plate is fixed by screws in
On wedge-shaped clamping plate, wedge-shaped bayonet socket is avoided to be slid from the inner fovea part of wedge-shaped clamping plate, screw is screw common on the market.
Further, the wedge-shaped bayonet socket is plane wedge, i.e., the composition surface of wedge-shaped clamping plate and wedge-shaped bayonet socket is plane wedge
The inclined-plane of shape, the mounting groove are rectangle locating slot, the axis of the mounting groove of wedge-shaped clamping plate, the through hole of wedge-shaped bayonet socket and guide rod
It is consistent with the bevel direction of plane wedge, moved up and down with ensureing that wedge-shaped card opening's edge wedged gap α.
Further, the wedge-shaped bayonet socket is arc surface wedge, and the mounting groove is annular positioning groove, the installation of wedge-shaped clamping plate
The axis of groove, the through hole of wedge-shaped bayonet socket and guide rod is consistent with the arc generatrix direction of arc surface wedge, to ensure wedge-shaped card opening's edge
Wedged gap α to move up and down.
Further, wedge grip angle beta >=40 ° of the wedge-shaped clamping plate.
Further, wedged gap α≤30 ° of the wedge-shaped bayonet socket.
The present invention compared with prior art, has the following advantages and advantages：
The present invention is applied to the clamp system of universal testing machine test for tensile strength, for existing templin chuck,
Present invention employs Double wedge type clamp, wedge-shaped clamping plate has larger amount of expansion, and moving up and down for wedge-shaped clamping plate makes being applicable for chuck
Scope is wider, and test specimen is easier to be loaded and dismantled, and wedge-shaped bayonet socket is provided with wedge-shaped clamping plate, is clamped to test specimen
When, wedge-shaped bayonet socket has less lock corner, and bayonet socket amount of expansion is small, and self-locking performance is strong, test specimen is easily clamped lock jail, due to wedge shape
The wedged gap of clamping plate is big, and amount of expansion is big, has one compared with small displacement in vertical direction, you can loosens or releases wedge-shaped clamping plate pair
The Bidirectional-squeezing power of wedge-shaped bayonet socket, once the pressure releases outside wedge-shaped bayonet socket, the wedge-shaped bayonet socket for stinging tight test specimen then unclamps naturally
Test specimen, it is easy to disassemble.
Brief description of the drawings
Accompanying drawing described herein is used for providing further understanding the embodiment of the present invention, forms one of the application
Point, do not form the restriction to the embodiment of the present invention.In the accompanying drawings：
Fig. 1 is schematic structural view of the invention.
Mark and corresponding parts title in accompanying drawing：
1- clamps, 2- wedge shape clamping plates, 3- wedge shape bayonet sockets, 4- push rods, 5- screws, 6- pressing plates, 7- guide rods, 8- springs, 9-
Mounting groove.
Embodiment
For the object, technical solutions and advantages of the present invention are more clearly understood, with reference to embodiment and accompanying drawing, to this
Invention is described in further detail, and exemplary embodiment of the invention and its explanation are only used for explaining the present invention, do not make
For limitation of the invention.
Embodiment one
As shown in figure 1, suitable for the clamp system of universal testing machine test for tensile strength, including clamp 1, clamp 1 is set
There is wedge-like opening, wedge-shaped clamping plate 2 is provided with wedge-like opening, wedge-shaped side of the clamping plate 2 away from clamp 1 is provided with inner fovea part, its
Wedge-shaped bayonet socket 3 is provided with inner fovea part, the wedged gap α of wedge-shaped bayonet socket 3 is less than the wedge grip angle beta of wedge-shaped clamping plate 2, wedge-shaped clamping plate
2 tops are provided with push rod 4；Wedge-shaped bayonet socket 3 is provided with male part, its male part and the inner fovea part halved joint of wedge-shaped clamping plate 2, and
And the wedge-shaped male part size of bayonet socket 3 is less than the inner fovea part size of wedge-shaped clamping plate 2, the inner fovea part of wedge-shaped clamping plate 2 is provided at both ends with peace
There is the through hole of coaxial different-diameter at tankage 9, the wedge-shaped male part both ends of bayonet socket 3, is respectively provided with guide rod 7 and spring 8 in through hole, leads
Inserted to bar 7 in the mounting groove 9 of the inner fovea part of wedge-shaped clamping plate 2, and wedge-shaped bayonet socket 3 can slide along guide rod 7, in spring 8
Under effect, guide rod 7 pushes up wedge-shaped bayonet socket 3 to enough height, is pulled with the upper and lower in-migration of push rod 4 and presses wedge-shaped clamping plate 2
Along β, angularly upper both sides are opened, downward both sides close up, and realize clamping and absent-mindedness of the wedge-shaped bayonet socket 3 to test specimen.
In said mechanism, the joint of wedge-shaped clamping plate 2 and wedge-shaped bayonet socket 3 is provided with pressing plate 6, and pressing plate 6 is solid by screw 5
It is scheduled on wedge-shaped clamping plate 2, avoids wedge-shaped bayonet socket 3 from being slid from the inner fovea part of wedge-shaped clamping plate 2.Wedge-shaped bayonet socket 3 is plane wedge, i.e. wedge
The composition surface of clevis plate 2 and wedge-shaped bayonet socket 3 is the inclined-plane of plane wedge, and mounting groove 9 is rectangle locating slot, the peace of wedge-shaped clamping plate 2
The axis of tankage 9, the through hole of wedge-shaped bayonet socket 3 and guide rod 7 is consistent with the bevel direction of plane wedge, to ensure wedge-shaped bayonet socket 3
Moved up and down along wedged gap α, wedge grip angle beta >=40 ° of wedge-shaped clamping plate 2, wedged gap α≤30 ° of wedge-shaped bayonet socket 3.
It is now that the brief introduction of work principle of the present invention is as follows for ease of understanding：When carrying out test for tensile strength, first open upwards
Dynamic push rod 4, it is allowed to jack up wedge-shaped clamping plate 2, wedge-shaped clamping plate 2 opens along wedge grip angle beta both sides.Now, wedge-shaped bayonet socket 3 is in wedge grip
Pushed up by spring 8 to uppermost position in fig-ure in plate 2, therefore wedge-shaped bayonet socket 3 is also at open configuration, and test specimen is put into wedge-shaped bayonet socket 3,
Wedge-shaped clamping plate 2 is pressed to using push rod 4, wedge-shaped clamping plate 2 closes up along angle β both sides, and drives wedge-shaped bayonet socket 3 to clamp test specimen；With
Same method clamps the test specimen other end.Stretch at the beginning, because the wedged gap α of wedge-shaped bayonet socket 3 is less than the wedge of wedge-shaped clamping plate 2
Clevis angle beta, so, test specimen and wedge-shaped bayonet socket 3 have a less frictional force with regard to that can make wedge-shaped bayonet socket 3 will along the displacement of α angles both sides
Test specimen is clamped, and as pulling force constantly increases, the clamping force of wedge-shaped bayonet socket 3 also constantly increases, until test specimen is thoroughly clamped
Lock jail.Now there are two kinds of situations：One kind is that wedge-shaped bayonet socket 3 does not arrive defined position, i.e., test specimen has been when not encountering wedge-shaped clamping plate 2 downwards
Break, then off-test；Another kind is that wedge-shaped bayonet socket 3 reaches defined position, i.e., encounters the wedge-shaped test specimen of clamping plate 2 downwards and do not draw also
It is disconnected, now, wedge-shaped bayonet socket 3 locked firm test specimen and it is 2-in-1 with wedge-shaped clamping plate be an entirety, continue to use along wedge grip angle beta both sides
Power clamps, and untill test specimen is broken, when drawing process terminates to dismantle test specimen residuum, wedge-shaped clamping plate 2 is in the presence of push rod 4
Opened along wedge grip angle beta both sides, while wedge-shaped bayonet socket 3 is released by the extruding force of wedge-shaped clamping plate 2, now wedge-shaped bayonet socket 3 unclamps examination
Part, and move up and automatically reset along wedged gap α both sides under the collective effect of guide rod 7 and spring 8, one-off drawing was tested
Journey terminates.
Embodiment two
The present embodiment and the difference of embodiment one are that wedge-shaped bayonet socket 3 is arc surface wedge, and mounting groove 9 is fixed for annular
Position groove, the mounting groove 9 of wedge-shaped clamping plate 2, the through hole of wedge-shaped bayonet socket 3 and the axis of guide rod 7 and the arc generatrix side of arc surface wedge
To consistent, to ensure that wedge-shaped bayonet socket 3 moves up and down along wedged gap α.
Embodiment above, the purpose of the present invention, technical scheme and beneficial effect are carried out further in detail
Illustrate, should be understood that the embodiment that these are only the present invention, the protection model being not intended to limit the present invention
Enclose, within the spirit and principles of the invention, any modification, equivalent substitution and improvements done etc., should be included in the present invention
Protection domain within.
Claims (6)
1. suitable for the clamp system of universal testing machine test for tensile strength, it is characterised in that including clamp (1), clamp (1) is set
Wedge-like opening is equipped with, wedge-shaped clamping plate (2) is provided with wedge-like opening, side of the wedge-shaped clamping plate (2) away from clamp (1) is provided with interior
Recess, wedge-shaped bayonet socket (3) is provided with its inner fovea part, and the wedged gap α of wedge-shaped bayonet socket (3) is less than the wedge shape of wedge-shaped clamping plate (2)
Angle β, wedge-shaped clamping plate (2) top are provided with push rod (4)；
The wedge-shaped bayonet socket (3) is provided with male part, its male part and the inner fovea part halved joint of wedge-shaped clamping plate (2), and wedge
Shape bayonet socket (3) male part size is less than the inner fovea part size of wedge-shaped clamping plate (2), and the inner fovea part of wedge-shaped clamping plate (2) is provided at both ends with
Mounting groove (9), wedge-shaped bayonet socket (3) male part both ends set the through hole of coaxial different-diameter, guide rod (7) are respectively provided with through hole
With spring (8), guide rod (7) is inserted in the mounting groove (9) of the inner fovea part of wedge-shaped clamping plate (2), and wedge-shaped bayonet socket (3) can be along leading
Slided to bar (7).
2. the clamp system according to claim 1 suitable for universal testing machine test for tensile strength, it is characterised in that institute
The joint for stating wedge-shaped clamping plate (2) and wedge-shaped bayonet socket (3) is provided with pressing plate (6), and pressing plate (6) is fixed on wedge shape by screw (5)
On clamping plate (2).
3. the clamp system according to claim 1 suitable for universal testing machine test for tensile strength, it is characterised in that institute
It is plane wedge to state wedge-shaped bayonet socket (3), and the mounting groove (9) is rectangle locating slot, the mounting groove (9) of wedge-shaped clamping plate (2), wedge shape
The through hole of bayonet socket (3) and the axis of guide rod (7) are consistent with the bevel direction of plane wedge.
4. the clamp system according to claim 1 suitable for universal testing machine test for tensile strength, it is characterised in that institute
It is arc surface wedge to state wedge-shaped bayonet socket (3), and the mounting groove (9) is annular positioning groove, the axle of the mounting groove (9) of wedge-shaped clamping plate (2)
Line, wedge-shaped bayonet socket (3) through hole axis and the axis of guide rod (7) and the arc generatrix direction of arc surface wedge it is consistent.
5. the clamp system suitable for universal testing machine test for tensile strength according to any one in Claims 1 to 4,
Characterized in that, wedge grip angle beta >=40 ° of the wedge-shaped clamping plate (2).
6. the clamp system according to claim 5 suitable for universal testing machine test for tensile strength, it is characterised in that institute
State wedged gap α≤30 ° of wedge-shaped bayonet socket (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710660509.2A CN107515152A (en) | 2017-08-04 | 2017-08-04 | Suitable for the clamp system of universal testing machine test for tensile strength |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710660509.2A CN107515152A (en) | 2017-08-04 | 2017-08-04 | Suitable for the clamp system of universal testing machine test for tensile strength |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107515152A true CN107515152A (en) | 2017-12-26 |
Family
ID=60722924
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710660509.2A Pending CN107515152A (en) | 2017-08-04 | 2017-08-04 | Suitable for the clamp system of universal testing machine test for tensile strength |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107515152A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111547518A (en) * | 2020-04-10 | 2020-08-18 | 张海林 | Centre gripping tongs mechanism based on commodity circulation transportation loading and unloading |
| CN114088514A (en) * | 2021-11-22 | 2022-02-25 | 中铁十七局集团第一工程有限公司 | Clamp for concrete axial tensile test |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2286522Y (en) * | 1996-05-06 | 1998-07-22 | 李长忍 | Chuck for specimens for material investigation device |
| CN2383061Y (en) * | 1999-06-10 | 2000-06-14 | 李长忍 | Double wedge type clamp for material tester |
| CN1261155A (en) * | 1999-01-18 | 2000-07-26 | 李步青 | Clamper for smooth and straight test part |
| CN201607361U (en) * | 2009-12-31 | 2010-10-13 | 河北双剑纺织机械有限公司 | Hydraulic universal material testing machine |
| CN203894105U (en) * | 2014-05-26 | 2014-10-22 | 吉林大学 | Tensile testing machine clamping device suitable for plate-shaped specimen |
| CN105466761A (en) * | 2015-12-15 | 2016-04-06 | 浙江大学 | Automatic alignment device for metal tensile samples in low-temperature environment testing box |
| CN105890990A (en) * | 2016-04-10 | 2016-08-24 | 济南天辰试验机制造有限公司 | Tensile clamp for self-lubricating wedge jaw testing machine |
-
2017
- 2017-08-04 CN CN201710660509.2A patent/CN107515152A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2286522Y (en) * | 1996-05-06 | 1998-07-22 | 李长忍 | Chuck for specimens for material investigation device |
| CN1261155A (en) * | 1999-01-18 | 2000-07-26 | 李步青 | Clamper for smooth and straight test part |
| CN2383061Y (en) * | 1999-06-10 | 2000-06-14 | 李长忍 | Double wedge type clamp for material tester |
| CN201607361U (en) * | 2009-12-31 | 2010-10-13 | 河北双剑纺织机械有限公司 | Hydraulic universal material testing machine |
| CN203894105U (en) * | 2014-05-26 | 2014-10-22 | 吉林大学 | Tensile testing machine clamping device suitable for plate-shaped specimen |
| CN105466761A (en) * | 2015-12-15 | 2016-04-06 | 浙江大学 | Automatic alignment device for metal tensile samples in low-temperature environment testing box |
| CN105890990A (en) * | 2016-04-10 | 2016-08-24 | 济南天辰试验机制造有限公司 | Tensile clamp for self-lubricating wedge jaw testing machine |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111547518A (en) * | 2020-04-10 | 2020-08-18 | 张海林 | Centre gripping tongs mechanism based on commodity circulation transportation loading and unloading |
| CN111547518B (en) * | 2020-04-10 | 2021-11-30 | 云南迦南飞奇科技有限公司 | Centre gripping tongs mechanism based on commodity circulation transportation loading and unloading |
| CN114088514A (en) * | 2021-11-22 | 2022-02-25 | 中铁十七局集团第一工程有限公司 | Clamp for concrete axial tensile test |
| CN114088514B (en) * | 2021-11-22 | 2023-12-29 | 中铁十七局集团第一工程有限公司 | Clamp for concrete axial tensile test |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20171226 |
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| RJ01 | Rejection of invention patent application after publication |