CN105738198A - Curve surface jaw clamp method and curve surface jaw clamp apparatus for vulcanized rubber room temperature tensile sample - Google Patents
Curve surface jaw clamp method and curve surface jaw clamp apparatus for vulcanized rubber room temperature tensile sample Download PDFInfo
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- CN105738198A CN105738198A CN201510939685.0A CN201510939685A CN105738198A CN 105738198 A CN105738198 A CN 105738198A CN 201510939685 A CN201510939685 A CN 201510939685A CN 105738198 A CN105738198 A CN 105738198A
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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
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- 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
- G01N2203/04—Chucks, fixtures, jaws, holders or anvils
- G01N2203/0458—Chucks, fixtures, jaws, holders or anvils characterised by their material
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Abstract
The invention discloses a room temperature tensile curve surface jaw clamp method for a vulcanized rubber or a thermoplastic elastomer dumbbell-shaped sample and aims to provide a tensile curve surface jaw clamp method which is stable and reliable, is simple in operation and avoids root fracture in a clamp section of the sample. In the technical scheme, four guide columns, which penetrate two curve surface fitting clamp pieces and are arranged vertically on the curve surface fitting clamp pieces at the four cornels of the curve surface fitting clamp pieces, are formed on the two curve surface fitting clamp pieces. Two pairs of symmetrical pins are respectively installed on the upper surfaces and the lower surfaces of a fixed and a movable curve clamp pieces, wherein the pins on the movable curve clamp pieces are used for fixing lug-shaped spring clamps, and the pins on the fixed curve clamp pieces are used for clamping a clamp mouth of the lug-shaped spring clamps. The two up and down lug-shaped spring clamps are fixedly connected to each other in a clamp manner through spring clamp handles to form a set of spring clamp. The movable curve surface clamp piece sliding along the guide columns is clamped by means of the lug-shaped spring clamps. The apparatus provides tensile pre-tightening force to the vulcanized rubber or the thermoplastic elastomer sample, thereby solving a problem of slipping-off due to thinning in a clamped end well.
Description
Technical field
The present invention relates to a kind of clamp method for vulcanite or thermoplastic elastomer (TPE) dumbbell specimen tensile test at room temperature, be specifically related to the vulcanite of a kind of firm clamping or thermoplastic elastomer (TPE) dumbbell specimen tensile test at room temperature curved surface jaw clamp method and device thereof.
Background technology
Vulcanite or thermoplastic elastomer (TPE) tension test be sample under bearing axial tensile loads, experiment with measuring produce correlation test data to characterize the test method of its each characteristic performance parameter.Wherein, specimen types is mainly dumbbell specimen and ring specimen.Dumbbell shape sample includes sample section and gripping section.Existing vulcanite or thermoplastic elastomer (TPE) dumbbell specimen tensile test at room temperature method of clamping realize mainly by the test fixture of plane jaw clamp method.The fixture of described use plane jaw clamp method, is characterized in that: 1, this type of holder block is divided into two pieces, left and right, and grip block clamping face is parallel to each other, and is typically fabricated with increasing the annular knurl lines of clamping effect；2, this type of fixture needs to use various fastening means to provide chucking power, is thus with tight two grip block clamping samples.Wherein, fastening means is divided into braking fastening and mechanical fasteners.In vulcanite or thermoplastic elastomer (TPE) tension test field, the conventional pneumatic fastening of braking fastening.Mechanical fasteners is commonly used various frame for movement and is produced pretightning force, including tools for bolts ' pretension and spring pre-tightening etc..But use plane jaw method of clamping to easily cause in sample drawing process bare terminal end to skid or fracture of root, cause that reflection test data that result of the test can not be correct lost efficacy.This is that two clamping face spacings will not change owing to the fixture of employing plane jaw clamp method is generally after completing sample holder.And vulcanite or the distinctive high resiliency of thermoplastic elastomer (TPE), can cause that sample is after Tensile stress effect, its gripping section can occur elongation on specimen length direction thinning with on sample thickness direction gradually.So adopting effective chucking power that the fixture of plane jaw clamp method can be provided by can reduce along with the lasting reduction of holding area, ultimately resulting in sample holder section and skidding.And adopt pneumatic fastening or the plane jaw clamp of special mechanical structure fastening, can after gripping section is thinning, change two grip block spacing and slow down holding area reduce to provide bigger chucking power.But this is easily caused that sample holder section thickness is thinning further and tear fracture is at its root, causes result of the test invalid.
Chinese patent notification number CN202204728U " for testing the fixture of rubber tensile intensity " provides a kind of fixture for testing rubber tensile intensity, two identical chucks " are placed in location in [" word groove, the junction of two chucks is respectively equipped with zigzag planar, symmetrical one end connecting two levers, the other end of lever is connected through the hinge one end of hand lever, and the other end of hand lever is commonly connected on cone rectangle column again through hinge.This fixture belongs to the plane jaw method of clamping of mechanical fasteners, can realize vulcanite or thermoplastic elastomer (TPE) tensile test at room temperature sample holder to a certain extent.But its chucking power can increase along with sample stretching displacement and constantly become big, when vulcanite or the thermoplastic elastomer (TPE) stretching of variety classes and thickness, because the bare terminal end of sample deforms difference, cannot accurately control the concordance in holder gap and sample tension-thining, when clamp gap change than sample thinning greatly time, can cause sample bare terminal end rupture；When clamping gap change and being less than sample change, the slippage of sample can be caused again.
Due to vulcanite or the distinctive high resiliency of thermoplastic elastomer (TPE), can cause that sample is after Tensile stress effect, its gripping section can occur elongation on specimen length direction thinning with on sample thickness direction gradually, so adopting the fixture of plane jaw clamp method to be difficult to avoid that, the sample holder section thus brought is skidded or root tear fracture.
Owing to vulcanite or thermoplastic elastomer (TPE) sample absorb more fluid molecule after seakeeping test between molecule segment, causing that its skin-friction coefficient strongly reduces, plane jaw method of clamping is more difficult to clamping sample.
Summary of the invention
The technical problem to be solved in the present invention is to provide the more stable reliable retention vulcanite of a kind of energy or thermoplastic elastomer (TPE) room temperature tensile sample, the clamp method of sample holder section fracture of root will not occur.
The technical solution adopted for the present invention to solve the technical problems is: a kind of vulcanite or thermoplastic elastomer (TPE) dumbbell specimen room temperature tensile curved surface jaw clamp method, it is characterized in that comprising the steps: to adopt an inversed l-shaped pedestal 2 with connecting rod 1, the curved surface of pairing about sample holder end is coordinated grip block, it is fixedly connected on the lower section of described inversed l-shaped pedestal 2 vertical plane, coordinate on grip block at two curved surfaces, make and run through inversed l-shaped pedestal 2 and curved surface and coordinate four of grip block vertical on it, and it is positioned at the guide pillar 7 of described curved surface grip block corner, two curved surfaces coordinate grip block to clamp sample under the chucking power that constituted fixture provides；Described curved surface coordinates grip block for fixing curved surface grip block 5, another is movable curved surface grip block 6, fixed clamp block 5 and movable grip block 6 are fixed by four guide pillars 7 by the rectangular distribution on its backboard, and loose movable curved surface grip block moves along guide pillar and clamps sample；On fixed clamp block 5 and movable grip block 6 upper and lower surface, it is respectively mounted two pairs of symmetrical pins 10, wherein the pin 10 on movable curved surface grip block 6 is used for fixing ear alligator clamp 3, pin 10 on fixing curved surface grip block 5 is for clamping ear alligator clamp bayonet socket, and upper and lower two ear springs 3 are by the clamping one group of alligator clamp of formation that connects together of alligator clamp handle 4；Specimen holder holding force is not fixed on curved surface grip block by being connected to, and can provide along the ear alligator clamp that sample draw direction rotates, the movable grip block 6 curved surface grip block slided along guide pillar is clamped by ear alligator clamp 3, vulcanite or thermoplastic elastomer (TPE) sample is provided and stretches pretightning force.
The present invention has the advantages that compared to prior art.
1, clamp reliable and stable.The present invention utilizes symmetrical a pair curved surface grip block, carries out vulcanite by two curved surfaces coordinated or thermoplastic elastomer (TPE) sample clamps.Under curved surface clamping action, sample holder end is no longer be subjected only to single horizontal thrust, but one group of composite force effect along curved surface tangential component and normal component of force.Under the effect of this composite force, when solving conventional planar clamping, the thinning pretightning force caused of sample reduces, and bare terminal end skids to cause sample introduction to occur, the problem that even slipping occurs in elimination fixture.Sample preferably resolves because of the slippage problem of the thinning generation of bare terminal end under the clamping of curved surface.
2, simple in construction, easy and simple to handle.The present invention adopts the dumbbell specimen curved surface pincer mouth stretching clamp with an inversed l-shaped pedestal, one group of ear alligator clamp, guide pillar and back-moving spring composition, simple in construction.Adopt and be equipped with ear alligator clamp and the grip block of back-moving spring function.When vulcanite or thermoplastic elastomer (TPE) dumbbell specimen are clamped, it is only necessary to promote spring handle, by the pin on ear spring clip people's grip block surface, clamping pretension function can be realized；After completing test, pulling spring handle, separated by the pin of ear alligator clamp with grip block surface, movable grip block can realize resetting under the effect of back-moving spring, takes out sample and can complete whole operating process.
The grip block coordinated by curved surface due to the clamp method of the present invention carries out sample holder, and sample holder is not only unidirectional thickness direction thrust, but along whole curved surface respectively making a concerted effort to tangential component and normal component of force.Under the effect made a concerted effort, when solving conventional planar clamping, the thinning pretightning force caused of sample reduces, and bare terminal end skids to cause sample introduction to occur, the problem that even slipping occurs in elimination fixture.Sample preferably resolves because of the slippage problem of the thinning generation of bare terminal end under the clamping of curved surface.Clamping effect is better than prior art.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the present invention is further described.
Fig. 1 is a kind of preferred embodiment clamp structure schematic diagram using clamp method of the present invention.
Fig. 2 is an alternative embodiment of the invention clamp structure schematic diagram.
In figure: 1 connecting rod, 2 inversed l-shaped pedestals, 3 ear alligator clamps, 4 alligator clamp handles, 5 fixed clamp blocks, 6 movable grip blocks, 7 guide pillars, 8 spacing listriums；9 pins, 10 back-moving springs, 11S type block rubber.
Detailed description of the invention
For the more stable reliable clamping vulcanite of energy or thermoplastic elastomer (TPE) room temperature tensile sample, the clamp method of the present invention adopts left and right two curved surfaces to coordinate grip blocks, fastening means the chucking power band provided is tight and then clamps sample.The clamping face of described two grip blocks is the curved surface of male-female engagement after clamping laminating, and its clamping curved surface is along being perpendicular to the nonvolatile organic acid that the guidewire movement of sample Impact direction is formed by the bent bus that the rate of disturbing is zero.In one preferably embodiment, this song bus is sigmoid curve.
For the more stable reliable clamping vulcanite of energy or thermoplastic elastomer (TPE) room temperature tensile sample, the clamping device of the present invention is: a kind of vulcanite or thermoplastic elastomer (TPE) dumbbell specimen room temperature tensile curved surface jaw clamping device, identical for structure, be separated from each other and connect respectively up and down two pieces of sample two ends.Being shaped with two pieces of grip blocks of left and right pairing, curved surface cooperation on it, fixed clamp block 5 is fixed on L-shaped pedestal 2, and L-shaped pedestal 2 is shaped with the connecting rod 1 being connected with stretcher pull bar.Being shaped with 4 that run through both its sidewalls vertical and be positioned at the guide pillar 7 of grip block corner on the grip block that two curved surfaces coordinate, loose movable grip block 6 can move with clamping along guide pillar or take out sample.Specimen holder holding force is by being connected on movable grip block 6 and can provide along the ear alligator clamp 3 that sample draw direction rotates, and vulcanite or thermoplastic elastomer (TPE) sample are provided and stretch chucking power after being clamped by ear alligator clamp 3 by the movable grip block 6 slided along guide pillar.
In Fig. 1-Fig. 2, vulcanite or thermoplastic elastomer (TPE) room temperature curved surface stretching clamp is identical by structure, be divided into use up and down two fixtures to form.Described fixture is connected with tensile test at room temperature machine crossbeam pin by connecting rod 1.According to the present invention, an inversed l-shaped pedestal 2 with connecting rod 1 can be adopted, grip block is coordinated to be fixedly connected on the lower section of described inversed l-shaped pedestal 2 vertical plane on the curved surface of pairing about sample holder end, two curved surfaces coordinate grip blocks are made four that run through both vertical on it and be positioned at the guide pillar 7 of above-mentioned curved surface grip block corner, two curved surfaces cooperation grip blocks clamp sample under the chucking power that constituted fixture provides；Described curved surface coordinates grip block for fixing curved surface grip block 5, another is movable curved surface grip block 6, fixed clamp block 5 and movable grip block 6 are fixed by four guide pillars 7 by the rectangular distribution on its backboard, and loose movable curved surface grip block moves along guide pillar and clamps sample；On fixed clamp block 5 and movable grip block 6 upper and lower surface, it is respectively mounted two pairs of symmetrical pins 10, wherein the pin 10 on movable curved surface grip block 6 is used for fixing ear alligator clamp 3, pin 10 on fixing curved surface grip block 5 is for clamping ear alligator clamp bayonet socket, and upper and lower two ear springs 3 are by the clamping one group of alligator clamp of formation that connects together of alligator clamp handle 4；Specimen holder holding force is by being connected to the ear alligator clamp offer do not fixed on curved surface grip block and can rotate along sample draw direction, the movable grip block 6 curved surface grip block slided along guide pillar is clamped by ear alligator clamp 3, vulcanite or thermoplastic elastomer (TPE) sample is provided and stretches pretightning force.
nullVulcanite or thermoplastic elastomer (TPE) room temperature curved surface stretching clamp，There is an inversed l-shaped pedestal 2 with connecting rod 1、Connect movable grip block 6 and the fixed clamp block 5 of dumbbell specimen bare terminal end，Movable grip block 6 and fixed clamp block 5 are that the curved surface being arranged on for a pair on described inversed l-shaped pedestal below surface plate coordinates grip block，On fixed clamp block 5 and movable grip block 6 upper and lower surface，It is separately installed with two pairs of symmetrical pins 10，Wherein the pin 10 on movable grip block 6 is used for fixing ear alligator clamp 3，Pin 10 on fixed clamp block 5 is for clamping ear alligator clamp bayonet socket，Upper and lower two ear springs 3 are by the clamping one group of alligator clamp of formation that connects together of alligator clamp handle 4，Fixed clamp block 5 and movable grip block 6 are fixed by four guide pillars 7 by the rectangular distribution on its backboard，Wherein movable grip block 6 slides on described guide pillar 7，The movable grip block 6 curved surface grip block slided along guide pillar is clamped by ear alligator clamp 3，Vulcanite or thermoplastic elastomer (TPE) sample are provided and stretches pretightning force.
Inversed l-shaped pedestal 2 upper surface has the screwed hole that is connected fixing with connecting rod 1, realize being connected with the fixing of connecting rod 1, screwed hole position of center line is concentric with grip block center of surface face, it is ensured that fixture passes to sample by agonic for the force value of cupping machine in drawing process.Its concentricity is most important, will directly affect the measuring accuracy of sample.The vertical of inversed l-shaped pedestal has the square slotted eye of and fixed clamp block 5 interference fit, the Main Function of this slotted eye is to be fixed on pedestal by fixed clamp block 5, realize rigidly fixing being connected with inversed l-shaped pedestal 2, connecting rod 1 and equipment crossbeam, the movable curved surface grip block 6 matched about sample holder end and fixing curved surface grip block 5 are fixedly connected on the lower section of described inversed l-shaped pedestal 2 vertical plane, and then ensure that the motion of fixture is consistent with testing machine crosshead displacement speed.
Movable grip block 6 and fixed clamp block 5 are that the curved surface being arranged on for a pair on described inversed l-shaped pedestal below surface plate coordinates grip block, and the curved surface of fixed clamp block 5 and movable grip block 6 matches, and curved surface is smooth, it is not necessary to carry out annular knurl or the processing flank of tooth.When this is primarily due to carry out axis or longitudinal stretching when testing machine, the curved surface of vulcanite or thermoplastic elastomer (TPE) sample holder end meeting joint jig male-female engagement, male-female engagement curved surface diverse location is formed the composite force that direction is different, now, sample holder end is no longer single transverse pressure, but along the composite force of the tangential of curve and normal component of force.Thus ensure that sample is by after curved surface clamp, will not in the thinning slippage caused of bare terminal end.
On fixed clamp block 5 and movable grip block 6 upper and lower surface, it is separately installed with two pairs of symmetrical pins 10, wherein the pin 10 on movable grip block 6 is used for fixing ear alligator clamp 3, pin 10 on fixed clamp block 5 is for clamping ear alligator clamp bayonet socket, upper and lower two ear springs 3 are by the clamping one group of alligator clamp of formation that connects together of alligator clamp handle 4, fixed clamp block 5 and movable grip block 6 are fixed by four guide pillars 7 by the rectangular distribution on its backboard, wherein movable grip block 6 can in the enterprising line slip of guide pillar 7, the movable grip block 6 curved surface grip block slided along guide pillar is clamped by ear alligator clamp 3, vulcanite or thermoplastic elastomer (TPE) sample are provided and stretches pretightning force.
Fixed clamp block 5 and movable grip block 6 are all shaped with 4 guide pillar 7 holes, and guide pillar 7 adopts interference fit to be arranged on fixed clamp block 5, and movable grip block 6 can in the enterprising line slip of guide pillar 7, and the axis method at guide pillar that is only capable of is slided.Fixed clamp block 5 and movable grip block 6 upper and lower surface are separately installed with 2 pairs of symmetrical pins 10.Wherein the pin on movable grip block 6 is used for fixing ear alligator clamp 3, and the pin on fixed clamp block 5 is for clamping ear alligator clamp bayonet socket.Ear alligator clamp 3 is processed by having hyperelastic spring steel plate, more traditional spring-like take-up device, and its thickness is thin, and processing is simple, and elastic force is good, especially in the present invention, to realizing the clamping of grip block and to unclamp action especially convenient.Ear alligator clamp 3 center is provided with a S shape block rubber 11, and the Main Function of this block rubber is to prevent the free end dislocation of two, alligator clamp center, and free end plays the effect of buffering simultaneously.For ensureing the smooth motion of movable grip block 6, adopt alligator clamp handle 4 to be fixed together by upper and lower two ear alligator clamps, form one group of alligator clamp.The plastics with some strength preferentially selected by alligator clamp handle 4 material of the present invention, but are not limited only to the alligator clamp handle with phase same-action of plastic material processing.
Above-mentioned four guide pillars are equipped with the decussation being connected by center little disc circumference the spacing listrium 8 that limit is constituted is installed, cross is installed limit and is entrapped in four guide pillars by top notch, ensure that the fixed installation of spacing listrium, it is therefore prevented that the possibility that movable grip block 6 is directly pulled.The little disc inner surface in spacing listrium 8 center is shaped with back-moving spring 9 fixed lobe.One end of back-moving spring 9 is fixed in this projection, and the other end is fixed on movable grip block 6.When movable grip block 6 is fixed on fixed clamp block 5 by ear alligator clamp 3 and clamps sample, back-moving spring 9 is tightened up, and after unclamping ear alligator clamp 3, back-moving spring 9 returns back to former free state, movable slider 6 is pulled open simultaneously, it is achieved grip block automatically reply function.
During use, vulcanite or thermoplastic elastomer (TPE) dumbbell specimen bare terminal end are put between movable grip block 6 and fixed clamp block 5, promote alligator clamp handle 4, ear alligator clamp 3 is snapped in the pin 10 on fixed clamp block 5 surface, complete clamping pretension work；After completing test, pulling alligator clamp handle 4, separated by the pin 10 of ear alligator clamp 3 with fixed clamp block 5 surface, movable grip block 6 can realize resetting under the effect of back-moving spring 9, takes out sample afterwards.
In one preferably embodiment, fixture is that structure is identical as depicted in figs. 1 and 2, is separated from each other and connects two pieces of clamp structures that sample two ends are connected with cupping machine crossbeam pin by connecting rod 1 respectively.
In one preferably embodiment, inversed l-shaped pedestal 2 upper surface is shaped with a screwed hole, threadeds with connecting rod 1.The vertical of inversed l-shaped pedestal 2 has the square slotted eye of and fixed clamp block 5 interference fit, by this slotted eye fixed clamp block 5 is rigidly fixed and be connected on pedestal.
In one preferably embodiment, L-shaped pedestal is shaped with the whorl brace rod connecting stretcher pull bar.Being fixed on two pieces, the left and right grip block below inversed l-shaped pedestal 2 vertical plane shown in Fig. 1 is that C shape curved surface coordinates grip block, two C shape curved surfaces coordinate grip block grip blocks are shaped with 4 that run through both vertical on it and be positioned at the guide pillar of grip block corner, one of C shape curved surface coordinates grip block folder to be fixed on L-shaped pedestal, and the loose C shape curved surface of another block coordinates grip block can move to clamp sample along guide pillar.Two grip blocks clamp clamping sample under the chucking power that fixture provides, this chucking power is shaped with arc shelves shoulder by ear alligator clamp upper end, after it rotates to fixed clamp block correspondence position, it is clamped on the protruding part that fixed clamp block is shaped with, is connected on non-fixed clamp block and can provide along the ear alligator clamp that sample draw direction rotates.
In the preferably embodiment of another kind shown in Fig. 2, fixed clamp block 5 and movable grip block 6 are in double; two S shapes, and made pair of S curved surface is smooth, and curved surface cooperates without annular knurl and the processing flank of tooth.Sample holder end fits tightly the double; two S shape curved surface of fixture.When testing machine stretches, sample holder end is made a concerted effort by and normal component of force tangential along double sigmoidal curve, and sample is without annular knurl or process and be difficult to slip under the flank of tooth.Fixed clamp block 5 and movable grip block 6 are shaped with four guide pillar 7 pilot holes, and guide pillar 7 interference fit is arranged on fixed clamp block 5, and movable grip block 6 can slide on guide pillar 7, and owing to guide pillar 7 limits, only guide pillar 7 length direction degree of freedom.From fixed clamp block 5 and movable grip block 6 clamping face same position, upper and lower four pairs of symmetrical pins 10 are being installed, the fixing ear alligator clamp 3 of pin on movable grip block 6, and ear alligator clamp 3 can rotate about rotation, the pin 10 on fixed clamp block 5 is for clamping ear alligator clamp 3 arc shelves shoulder.
In the above-described embodiments, being fixed on two pieces, the left and right grip block below inversed l-shaped pedestal 2 vertical plane is that C shape curved surface coordinates or double; two S shape curved surface grip block, two C shape curved surfaces coordinate or double; two S shape curved surface grip block is shaped with the shelves shoulder of arc by ear alligator clamp upper end, after its grade of shoulder rotates to fixed clamp block correspondence position along sample draw direction, it is clamped on the protruding part that fixed clamp block is shaped with, chucking power is thus provided.
In one preferably embodiment, ear alligator clamp 3 is processed by having hyperelastic spring steel plate.More traditional spring-like take-up device, its thickness is thinner, and processing is simpler, elastic better.Ear alligator clamp 3 center is provided with a S type block rubber 11, and this block rubber can prevent the free end dislocation of ear alligator clamp 3 heart portion two, and free end can play the effect of stress buffer simultaneously.Two the ear alligator clamps 3 being positioned at movable grip block 6 top and bottom are connected by alligator clamp handle 4.The present embodiment alligator clamp handle 4 material therefor preferentially selects the macromolecular material with some strength, but is not limited only to by the alligator clamp handle with phase same-action of processing of high molecular material.Spacing listrium 8 is made up of the little disc in cross installation Bian He center, and cross installation checkpost enters in the top notch of four guide pillars, to fixedly mount spacing listrium, it is prevented that movable grip block 6 skids off from guide pillar 7.The little disc inner surface in spacing listrium 8 center is shaped with the projection of a fixed reset spring 9.One end of back-moving spring 9 is fixed in this projection, and the other end is fixed on movable grip block.When clamping sample, movable grip block 6 is fixed on fixed clamp block 5 by ear alligator clamp 3, and back-moving spring 9 is tightened up；Completing after sample holder unclamps ear alligator clamp 3, movable grip block 6 spring 9 that is reset pulls open disengaging fixed clamp block 5, and clamped sample can conveniently take out.
The use procedure of this preferred embodiment is: vulcanite or thermoplastic elastomer (TPE) dumbbell specimen bare terminal end are put between movable grip block 6 and fixed clamp block 5, promote alligator clamp handle 4, ear alligator clamp 3 is snapped in the pin 10 of fixed clamp block 5 upper and lower surface, namely completes the clamping of sample gripping section.Adjust upper and lower two pieces of chucking positions, clamp sample another side gripping section by above-mentioned steps.After tension test completes, pulling upper and lower two pieces of clamp springs folder handle 4, separated by the pin 10 of ear alligator clamp 3 with fixed clamp block 5 upper and lower surface, movable grip block 6 disengages fixed clamp block 5 under the effect of back-moving spring 9, and sample can easily take out.
According to vulcanite disclosed above or thermoplastic elastomer (TPE) room temperature curved surface stretching clamp, can be realized by professional and technical personnel in the field easily or use the present invention.And after understanding above disclosure completely, various deformation and amendment can be designed.Therefore the present invention is not intended to be limited to specific embodiment disclosed herein, and is to fit to clamp the consistent modifications and variations of reset function and equivalent thereof with curved surface.
Claims (10)
1. a vulcanite or thermoplastic elastomer (TPE) dumbbell specimen room temperature tensile curved surface jaw clamp method, it is characterized in that comprising the steps: to adopt an inversed l-shaped pedestal (2) with connecting rod (1), grip block is coordinated to be fixedly connected on the lower section of described inversed l-shaped pedestal (2) vertical plane on the curved surface of pairing about sample holder end, two curved surfaces coordinate grip blocks are made four that run through both vertical on it and be positioned at the guide pillar (7) of above-mentioned curved surface grip block corner, two curved surfaces coordinate grip block to clamp sample under the chucking power that constituted fixture provides；Described curved surface coordinates grip block for fixing curved surface grip block (5), another is movable curved surface grip block (6), fixed clamp block (5) and movable grip block (6) are fixed by four guide pillars (7) by the rectangular distribution on its backboard, and loose movable curved surface grip block moves along guide pillar and clamps sample；On fixed clamp block (5) and movable grip block (6) upper and lower surface, it is respectively mounted two pairs of symmetrical pins (10), wherein the pin (10) on movable curved surface grip block (6) is used for fixing ear alligator clamp (3), pin (10) on fixing curved surface grip block (5) is for clamping ear alligator clamp bayonet socket, and upper and lower two ear springs (3) are by the clamping one group of alligator clamp of formation that connects together of alligator clamp handle (4)；Specimen holder holding force is by being connected to the ear alligator clamp offer do not fixed on curved surface grip block and can rotate along sample draw direction, movable grip block (6) the curved surface grip block slided along guide pillar is clamped by ear alligator clamp (3), vulcanite or thermoplastic elastomer (TPE) sample is provided and stretches pretightning force.
2. thermoplastic elastomer (TPE) dumbbell specimen room temperature tensile curved surface jaw clamp method as claimed in claim 1, it is characterized in that: being fixed on two pieces, the left and right grip block below inversed l-shaped pedestal 2 vertical plane is that C shape curved surface coordinates or double; two S shape curved surface grip block, two C shape curved surfaces coordinate or double; two S shape curved surface grip block is shaped with arc shelves shoulder by ear alligator clamp upper end, after its circular arc shelves shoulder rotates to fixed clamp block correspondence position along sample draw direction, it is clamped on the protruding part that fixed clamp block is shaped with, chucking power is thus provided.
3. vulcanite as claimed in claim 1 or thermoplastic elastomer (TPE) dumbbell specimen room temperature tensile curved surface jaw clamp method, it is characterized in that: being equipped with the decussation being connected by center little disc circumference on four guide pillars (7) and install the spacing listrium (8) that limit is constituted, cross is installed limit and is entrapped in four guide pillars by top notch；The little disc inner surface in spacing listrium (8) center is shaped with back-moving spring (9) fixed lobe, and one end of back-moving spring (9) is fixed in this projection, and the other end is fixed on movable grip block (6).
4. thermoplastic elastomer (TPE) dumbbell specimen room temperature tensile curved surface jaw clamp method as claimed in claim 3, it is characterized in that: when movable grip block (6) is fixed on fixed clamp block (5) upper clamping sample by ear alligator clamp (3), back-moving spring (9) is tightened up, after unclamping ear alligator clamp (3), back-moving spring (9) returns back to former free state, movable slider (6) is pulled open simultaneously, it is achieved grip block automatically reply function.
5. thermoplastic elastomer (TPE) dumbbell specimen room temperature tensile curved surface jaw clamp method as claimed in claim 4, it is characterized in that: promote alligator clamp handle (4), ear alligator clamp (3) is snapped in the pin (10) on fixed clamp block (5) surface, completes clamping pretension work；After completing test, pull alligator clamp handle (4), ear alligator clamp (3) is separated with the pin (10) on fixed clamp block (5) surface, movable grip block (6) can realize resetting under the effect of back-moving spring (9), takes out sample afterwards.
6. thermoplastic elastomer (TPE) dumbbell specimen room temperature tensile curved surface jaw clamp method as claimed in claim 1, it is characterized in that: from fixed clamp block (5) and movable grip block (6) clamping face same position, upper and lower four pairs of symmetrical pins (10) are being installed, the fixing ear alligator clamp (3) of pin on movable grip block (6), and ear alligator clamp (3) can rotate about rotation, the pin (10) on fixed clamp block (5) is takeed on for clamping ear alligator clamp (3) arc shelves.
7. the vulcanite using method described in claim or thermoplastic elastomer (TPE) curved surface stretching clamp, there is an inversed l-shaped pedestal (2) with connecting rod (1), the movable grip block (6) connecting dumbbell specimen bare terminal end and fixed clamp block (5), it is characterized in that: inversed l-shaped pedestal (2) upper surface has the screwed hole that is connected fixing with connecting rod (1), realizing fixing connection the with connecting rod (1), screwed hole position of center line is concentric with grip block center of surface face；nullMovable grip block (6) and fixed clamp block (5) are that the curved surface being arranged on for a pair on described inversed l-shaped pedestal below surface plate coordinates grip block，On fixed clamp block (5) and movable grip block (6) upper and lower surface，It is separately installed with two pairs of symmetrical pins (10)，Wherein the pin (10) on movable grip block (6) is used for fixing ear alligator clamp (3)，Pin (10) on fixed clamp block (5) is for clamping ear alligator clamp bayonet socket，Upper and lower two ear springs (3) are by the clamping one group of alligator clamp of formation that connects together of alligator clamp handle (4)，Fixed clamp block (5) and movable grip block (6) are fixed by four guide pillars (7) by the rectangular distribution on its backboard，Wherein movable grip block (6) is in the upper slip of described guide pillar (7)，Movable grip block (6) the curved surface grip block slided along guide pillar is clamped by ear alligator clamp (3)，Vulcanite or thermoplastic elastomer (TPE) sample are provided and stretches pretightning force.
8. vulcanite as claimed in claim 7 or thermoplastic elastomer (TPE) curved surface stretching clamp, it is characterized in that: be fixedly connected with the square slotted eye of and fixed clamp block (5) interference fit on the vertical of inversed l-shaped pedestal, connecting rod (1) realizes rigidly fixing connection by described square slotted eye and testing equipment crossbeam.
9. vulcanite as claimed in claim 1 or thermoplastic elastomer (TPE) curved surface stretching clamp, it is characterized in that: ear alligator clamp (3) center is provided with one and prevents the free end dislocation of two, alligator clamp center, cushions S shape block rubber (11) of described free end.
10. vulcanite as claimed in claim 1 or thermoplastic elastomer (TPE) curved surface stretching clamp, it is characterized in that: being equipped with the decussation being connected by center little disc circumference on four guide pillars and install the spacing listrium (8) that limit is constituted, cross is installed limit and is entrapped in four guide pillars by top notch.
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| CN201510939685.0A CN105738198B (en) | 2015-12-16 | 2015-12-16 | Vulcanized rubber room temperature tensile sample curved surface jaw clamp method and its device |
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| CN105738198B CN105738198B (en) | 2019-03-15 |
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Cited By (1)
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|---|---|---|---|---|
| CN108195679A (en) * | 2018-02-11 | 2018-06-22 | 东南大学 | A kind of device and test method for measuring wire rod tiny sample tensile strength |
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| US20080257120A1 (en) * | 2007-04-17 | 2008-10-23 | Illinois Tool Works Inc. | Swivel jaw face for tensile and similar testing |
| CN202204728U (en) * | 2011-09-06 | 2012-04-25 | 南昌航空大学 | Clamp used for testing tensile strength of rubber |
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