CN103091163B - Device for measuring elongation and cross section shrink rate of metal stretching sample through fast clamping - Google Patents
Device for measuring elongation and cross section shrink rate of metal stretching sample through fast clamping Download PDFInfo
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- CN103091163B CN103091163B CN201310009820.2A CN201310009820A CN103091163B CN 103091163 B CN103091163 B CN 103091163B CN 201310009820 A CN201310009820 A CN 201310009820A CN 103091163 B CN103091163 B CN 103091163B
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Abstract
The invention discloses a device for measuring elongation and cross section shrink rate of a metal stretching sample through fast clamping. The device consists of a guide rail, two groups of clamping head components, a positioning measuring arm, a U-shaped support, a movable platform, a platform positioning knob, two circular supporting plates and two rectangular supporting plates. The direction facing a test operator is taken as an example, a left side clamping head component is fixedly arranged between the two circular supporting plates; the right side clamping head component is fixedly arranged between the two rectangular supporting plates; the left side clamping head component is fixedly inserted into the U-shaped support at the left end of the guide rail; the right side clamping head component is arranged on the movable platform on the right side of the guide rail; the movable platform is arranged on the guide rail and can slide along with the guide rail; a base of the positioning measuring arm is connected with the guide rail through a right-angled bending plate; and the platform positioning knob is arranged on the movable platform. The device is wide in applicability and easy to detach and maintain, the structure accords with human engineering, the two aspects of fastening and measuring are simultaneously considered, the operation time is greatly shortened and the strength is greatly alleviated.
Description
Technical field
The present invention relates to a kind of measurement mechanism, relate in particular to a kind of measurement metal stretching sample extensibility of quick-clamping and the device of reduction of area.
Background technology
Plasticity index can represent the safe mechanical property of material, and can reflect the quality of metallurgical quality, therefore can be in order to evaluate the quality of metal material.The industrial circles such as modern mechanical, metallurgy, building, material extensively adopt tension test, and the elongation after fracture A(by measuring tensile sample is hereinafter to be referred as extensibility) or reduction of area Z(hereinafter to be referred as shrinkage factor) reflect this mechanical property parameters of plasticity.The conventional tension test of machine industry of take is example, for original gauge length L
oshorter typical steel sample, only need be by the two-section tensile sample of fracture after fracture pars fibrosa connects while measuring its extensibility and shrinkage factor, with the vernier caliper measurement gauge length L that has no progeny
uand the minimum place of necking down diameter d
u.But for the material of the fracture properties of enbrittling such as spheroidal-graphite cast iron, its section part is often torn tissue with part, cause and be difficult to connect and the problem such as measuring error is large.According to the relevant regulations of measuring about extensibility and shrinkage factor in standard GB/T/T228-2002 " metal material tensile test at room temperature way ", the sample that tension test finishes rear fracture should carefully connect to guarantee that the two axis is on same straight line, and takes special measure to guarantee the suitably contact of sample fracture part.In order to reach the related request of GB, need the corresponding auxiliary fixture that connects fracture sample of design, so that Measurement accuracy extensibility and shrinkage factor.
In industrial and mining enterprises and scientific research institutions, generally lack the use of this class auxiliary clamp at present, part arbitration test mechanism, even yet rested on without the auxiliary stage that connects measurement of instrument.Only two kinds of simple auxiliary clamping tools, are respectively the types from horizontal and vertical next fastening sample now.Wherein laterally fastening clips is comprised of stiff end and movable end, and its movable end utilizes worm drive to make addendum cone laterally pierce the pilot hole that sample stays when machine work, thereby two-section sample is squeezed into the groove of stiff end.This is simple in structure easy-to-use but be only applicable to clavate sample, and is prone to and connects sample " bending ", i.e. the problem that the sample axis of two-section fracture does not overlap.And longitudinally apply the clamp structure of fastening force, and conventionally the sample of two fractures is placed on the trough of belt base of same size to keep with one heart, then directly over sample, with worm drive, make pressure head compress sample respectively.The operating space that longitudinally retention mechanism has greatly limited vernier caliper, and all must use worm drive to adapt to the fastening demand of different-diameter (or thickness) sample, loading and unloading is wasted time and energy.
Above-mentioned fixture function singleness, still needs operator to use vernier caliper during measurement.For circular section sample, slide calliper rule measuring jaw when the gauge length line of location very easily in specimen surface slippage.For fear of measuring jaw and sample excessive contact, and when fine setting activity measuring jaw, keep fixedly measuring jaw to be accurately positioned gauge length zero point, need experimenter to drop into larger energy and carefully operate, thereby measure and need to spend the more time.In addition, due to measuring jaw line, Chang Yi departs from sample axis, the error of the impact such as light, visual angle and slide calliper rule self (vernier of ten deciles of take is example, and its indicating value total error is ± 0.1mm) in addition, and the total indicator reading (TIR) error of introducing can reach 20 ~ 30.Especially the vernier scale of 20 deciles (vernier scale minimum scale 0.05mm) and 50 deciles (vernier scale minimum scale 0.02mm), reading also needs certain computing time.In replica test or ingredient inspection process in enormous quantities, manipulation strength but also efficiency that the combination of this fixture and slide calliper rule does not only reduce testing crew are lower.
Summary of the invention
In order to solve the technical matters of above-mentioned existence, the present invention has overcome deficiency of the prior art, provides a kind of quick-clamping to measure the device of metal stretching sample extensibility and reduction of area.
The present invention is achieved through the following technical solutions: a kind of quick-clamping is measured the device of metal stretching sample extensibility and reduction of area, guide rail, two groups of chuck components, location survey arm, U-shaped bearing, movable platform, platform positioning knob, two circular base slabs and two rectangle back up pads, consists of; Take towards test operation person's direction is example, left side chuck component is mounted between two circular base slabs, right side chuck component is mounted between two rectangle back up pads, and the former injects the U-shaped bearing that is fixed on guide rail left end, and the latter is placed on the movable platform on guide rail right side; Movable platform is arranged on guide rail and can slides along guide rail, and the base of location survey arm is connected with guide rail by an angle block of right angle, and platform positioning knob is arranged on movable platform.
Described chuck component by rectilinear quick pressing tongs, pressure head component, I font endure plate, rocking arm, rocking shaft, V-arrangement jaw, back-moving spring and spring base, case assembles.Wherein, rectilinear quick pressing tongs is arranged on respectively in circular base slab and rectangle back up pad; Pressure head component is fixed on the U-shaped pressure handle of rectilinear quick pressing tongs, and puts in case inside, and the place ahead of pressure head component is that plate endured in I font; Two rocking arms are arranged on case symmetrically by rocking shaft, and rocking arm one end props up very plate, and its other end puts in the G shape stopper slot that jaw afterbody outputs; Spring base horizontal direction is fixed on case; Jaw is placed in the both sides up and down of spring base, and two jaws are connected with spring base by back-moving spring, outputs respectively a guide-track groove on the surface of contact of jaw both sides and case, and jaw embeds in the guide-track groove of its both sides by the pin of square-section.
Described location survey arm by cross curve laser fixedly penetrate head, laser head deck, reflecting grating tablet, cross curve laser movably penetrate head, digital display module, support, rotation axis, laterally screens slide block, longitudinally screens slide block, stand base, base positioning knob, angle block of right angle, laser head power supply form.Wherein, cross curve laser is fixedly penetrated head and is arranged in laser head deck, and this laser head deck is fixed on the null position of reflecting grating tablet; Cross curve laser is movably penetrated head and is arranged in another laser head deck, this laser head deck and digital display module are bonded together, and be arranged on screen and can extend to slip along screen, screen is fixed on the top of support, the bottom of support is fixed on rotation axis, support and the guide rail part outward in sustained height, rotation axis inserts in the cylinder groove of stand base, on stand base, output twice sliding tray, in groove, be inserted with respectively horizontal screens slide block and longitudinal screens slide block, base positioning knob is arranged on angle block of right angle and is connected to stand base.
In order to guarantee that cross curve laser penetrates head and the concentricity of reflecting grating tablet zero point and digital display module measuring point, described laser head deck is semicircle column type hollow sleeve holder structure.
Described pressure head component is comprised of double threaded screw, pressure head setscrew nut, regulating spring, pressure head body and stop nut, whole pressure head component is fixed on the U-shaped pressure handle of pressing tongs by two setscrew nuts on double threaded screw top, between setscrew nut and pressure head body, insert regulating spring, and be screwed into stop nut at double threaded screw end.
Owing to adopting technique scheme, quick-clamping provided by the invention is measured the device of metal stretching sample extensibility and reduction of area, compared with prior art, has following beneficial effect:
In order to solve existing fastener, add the inefficient problem of unloading, special transmission and the jaws structure that the present invention is based on planar linkage principle design, can replace worm drive to realize the fastening effect that difformity, different size sample " are settled at one go ".In addition, this scheme is integrated into fastener survey instrument, with contactless laser positioning, coordinates reflecting grating tablet and digital display module, and not only accurate positioning reading is directly perceived, and avoided the common various operating mistakes of vernier caliper, reduced the impact of human factor on result.Applicability of the present invention is wide, be easy to detachable maintaining, and its structure meets ergonomics, from fastening and measure two aspects and start with simultaneously, significantly reduces running time and intensity.
The present invention is simple to operate, saving is artificial, and being therefore suitable for physics and chemistry detection department of vast industrial and mining enterprises carries out large batch of examination of materials work.In addition, this apparatus structure is in neat formation to be measured precisely, and function meets the requirement that national standard is measured tension test related data completely, and therefore being also applicable to scientific research institutions carries out arbitration test.Uneven to the detection level of material property in view of most test unit, machine equipment and the operational administrative system of shortage and coordinative composition of equipments, cause correlated quality mismanagement, arbitration data distortion.Therefore, promoting the use of of this device, contributes to the Material Test Specificationization of all kinds of quality testing departments with specialized, to accelerating material test flow process, and the progress that promotes experimental technique, all there is good facilitation.
Accompanying drawing explanation
Fig. 1 is general structure schematic diagram of the present invention;
Fig. 2 is the structural representation of chuck component;
Fig. 3 be rectilinear quick pressing tongs add unloading embodiment;
Fig. 4 is the fundamental diagram of chuck component;
Fig. 5 is the part section structural map of pressure head component;
Fig. 6 is the structural representation of location survey arm;
Fig. 7 is the embodiment schematic diagram of the present invention when location survey arm measure extensibility;
Fig. 8 is the embodiment schematic diagram of the present invention when location survey arm measure shrinkage factor.
Embodiment
Below in conjunction with accompanying drawing and embodiment, the structural design of each critical piece of the present invention and principle of work are further described.
A kind of quick-clamping is measured the device of metal stretching sample extensibility and reduction of area, as shown in Figure 1, by guide rail 01, two groups of chuck components 02, location survey arm 03, U-shaped bearing 04, movable platform 05, platform positioning knob 06, two circular base slabs 07 and two rectangle back up pads 08, formed.Left side chuck component 02 is mounted between two circular base slabs 07, and right side chuck component 02 is mounted between two rectangle back up pads 08, and the former injects the U-shaped bearing 04 that is fixed on guide rail 01 left end, and the latter is placed on the movable platform 05 on guide rail 01 right side.Movable platform 05 is arranged on guide rail 01 and can slides along guide rail 01, and the base of location survey arm 03 is connected with guide rail 01, and platform positioning knob 06 is arranged on movable platform 05.
Fig. 2 is the structural representation of chuck component 02.Chuck component 02 is endured plate (hereinafter to be referred as enduring plate) 11, two rocking arm 12,13, two rocking shafts 14 of a pair of V-arrangement jaw (hereinafter to be referred as jaw), a pair of back-moving spring 15 and spring base 16, cases 17 by rectilinear quick pressing tongs (hereinafter to be referred as pressing tongs) 09, pressure head component 10, I font and is assembled.Wherein, the pressing tongs shown in Fig. 3 09 is arranged on respectively on back up pad 07 and 08; Pressure head component 10 is fixed on pressing tongs U-shaped pressure handle 22, and puts in case 17 inside, and the place ahead of pressure head component 10 is to endure plate 11; Article two, rocking arm 12 is arranged on case 17 symmetrically by two rocking shafts 14, and rocking arm 12 one end prop up very plate 11, and its other end props up the afterbody of jaw 13.
More than the object of design is to drive pressure head component 10 to enduring plate 11 imposed loads by pressing tongs 09, and this load is finally delivered to jaw 13 by rocking arm 12.In order to guarantee said structure all-the-time stable in driven load process, need the pointed structure of some of them parts and function.For this reason, very plate 11 is designed to the shape just like English capitalization I, and this structure can prevent that web from deflecting and even toppling over while being promoted by pressure head component 10 by upper and lower two blocks of wing plates.In addition, output the spacing groove of similar English capitalization G shape at the afterbody of jaw 13, and rocking arm 12 one end are put in this G shape stopper slot 18, when too quickly to prevent from adding/unload, rocking arm 12 disengages with jaw 13, causes jaw 13 to work.The locus of two rocking arms 12 is symmetrical, and polish respectively smooth fillet with the arm two ends that very plate 11 contact with jaw 13, this can guarantee rocking arm 12 and endure plate 11, jaw 13 contacts all the time, also can guarantee the fluency of transmission.Spring base 16 horizontal directions are fixed on case 17.Two jaws 13 are placed in the both sides up and down of spring base 16, by back-moving spring 15, are connected with spring base 16, output respectively a guide-track groove 19 on the surface of contact of jaw 13 both sides and case 17; When inserting after pin 20 below G shape stopper slot 18, jaw 13 just can embed the guide-track groove 19 of its both sides.During due to chuck component 02 normal work, only need jaw 13 to have Z-axis direction and move one degree of freedom, remove the degree of freedom of being controlled by structure itself, also need pin 20 to adopt fillet square sectional, to retrain simultaneously, the X axis of jaw 13 moves and two degree of freedom of XOZ face rotation.
As shown in Figure 3, in the process that adds at pressing tongs/unload, operator only need be with pulling pressing tongs handle 21 before and after hand, and what just can settle at one go by U-shaped pressure handle 22 applies/unload fastening force.Due to the cross sectional shape of tensile sample various (cylindrical, template etc.) and diameter or thickness (Ф 10, Ф 20 etc.) different, even if same batch material sample also can there are differences because of machine work.In order to make chuck component can compress the sample of dissimilar size, need the stroke of jaw 13 to there is adjustability.Owing to enduring plate 11 and rocking arm 12, be simple drive mechanism, the pressure head component 10 that therefore applies fastening force should have specific structure.
As shown in Figure 4, pressure head component 10 is by 23, two pressure head setscrew nuts 24 of double threaded screw, regulating spring 25, and pressure head body 26 and stop nut 27 form.Two setscrew nuts 24 of whole pressure head component 10 by double threaded screw 23 tops are fixed on (see figure 5) on the U-shaped pressure handle 22 of pressing tongs, between nut 24 below U-shaped pressure handle 22 and pressure head body 26, insert regulating spring 25, double threaded screw 23 ends are screwed into stop nut 27, and when too quickly to prevent from unloading, pressure head body 26 and screw rod 23 depart from.When front and back sample sectional dimension to be measured differs not very big, only need to rely on spring 25 self to get final product the stroke of adjusting jaw 13.When the sectional dimension between sample to be tested differs larger, need to adjust setscrew nut 24, to discharge or to regain more spiro rod length, can significantly adjust the compression distance of pressure head body 26 like this, thereby reach the object of adjusting jaw 13 strokes on a large scale.
The principle of work of chuck component 02 is as shown in Figure 5: when loading, after U-shaped pressure handle 22 passes to fastening force by pressure head body 26 very plate 11, it just squeeze forward push away two rocking arms 12 and up and down jaw 13 transmit the fastening force that pressure head bodies 26 apply.When unloading, the spring of spring base 16 tops relies on the release of elastic energy of deformation to prop up upper jaw; Lower jaw utilizes self gravitation and departs from sample.Consider that jaw 13 has certain quality and volume, back-moving spring 15 required for the present invention should adopt elastic modulus material large and that be suitable for top load workplace to make, as the good silicon-manganese spring steel of tempering resistance etc.In addition, for back-moving spring 15 can evenly being carried at work and steadily upright, not only need spring to there is larger central diameter, and spring two ends should not participate in multi-turn the bracing ring of working deformation, twist when avoiding spring body to add unloading.By the combined mechanism of this connecting rod and rocking arm, just can replace the screw-drive mechanism of wasting time and energy, and can fast horizontal load be converted into vertical load, thereby vacate a large amount of operating spaces for measuring structure.
As shown in Figure 6, described location survey arm 03 be by cross curve laser fixedly penetrate 28, a pair of laser head deck 29, reflecting grating tablet 30, cross curve laser movably penetrate 31, digital display module 32, support 33, rotation axis 34, laterally screens slide block 35, longitudinally screens slide block 36, stand base 37, base positioning knob 38, angle block of right angle 39, laser head power supply 40 forms.Cross curve laser is fixedly penetrated 28 and is arranged on wherein in a laser head deck 29, and this laser head deck 29 is fixed on the null position of reflecting grating tablet 30.Cross curve laser is movably penetrated 31 and is arranged in another laser head deck 29, this laser head deck 29 is bonded together with digital display module 32, and be arranged on reflecting grating tablet 30 and can be along the extension of reflecting grating tablet 30 to slip, reflecting grating tablet 30 is fixed on the top of support 33, the bottom of support 33 is connected on rotation axis 34, rotation axis 34 inserts in the cylinder groove of stand base 37, on stand base 37, output two mutually perpendicular sliding trays of direction, in groove, be inserted with respectively horizontal screens slide block 35 and longitudinal screens slide block 36, base positioning knob 38 is arranged on angle block of right angle 39.For guarantee cross curve laser fixedly penetrate 28 with the registration at zero point of reflecting grating tablet 30, and cross curve laser movably penetrate 31 with the concentricity of digital display module 32 measuring points, after considering kinds of schemes, the semicircle column type hollow sleeve seat that laser head deck 29 adopts as shown in Figure 6.In addition, in order to switch fast the measurement function of extensibility and shrinkage factor, by Sheet Metal Forming Technology, make support 33 and the part outward of guide rail 01 in sustained height, and its bottom is fixed on rotation axis 34.Rotation axis 34 is inserted in the cylinder groove of stand base 37, can make support do reciprocating rotation stably.
Strict parallel or vertical with sample when surveying extensibility with shrinkage factor for guaranteed discharge arm, need corresponding structure and measure.When horizontal screens slide block 35 being placed in to the right-hand member of its place groove, and when longitudinally a screens slide block 36 is placed in the lower end of its place groove, support 33 can freely rotate with rotation axis 34.When measuring extensibility, keep longitudinal screens slide block 36 to be positioned at groove lower end, place motionless, rotate counterclockwise support 33 until its bottom, with after longitudinally screens slide block 36 contacts, then is pushed place groove left end to horizontal screens slide block 35, can withstand and keep location survey arm 03 strictly parallel with guide rail 01.Next movable stand base 37, cross curve laser was fixedly penetrated after the zero point of the original gauge length of reticle alignment sample of 28 transmittings, turn the base positioning knob 38 on angle block of right angle 39, make support 33 and guide rail 01 close contact, now just removable digital display module 32 is carried out the measurement of extensibility; And when surveying shrinkage factor, first horizontal screens slide block 35 is pushed back to place groove right-hand member and support 33 is clockwise to and be in contact with it, then make longitudinal screens slide block 36 be advanced into groove upper end, place and can withstand and keep location survey arm 03 strictly vertical with guide rail 01.Next by pulling angle block of right angle 39, make guide rail 01 enter the bending part of support 33, thereby order fixedly penetrate 28 and can locate the maximum necking down position of sample, and finally read reduction of area.
Take the measurement implementation result of above step as shown in Figure 7.Before tension test starts, first to sample, carry out original gauge length with scoring tool.After off-test, the tensile sample 41(of two-section fracture should be take to circular section tensile sample as example) with one of gauge length line 42, face up, then put respectively chuck component 02 into.Now press the embodiment shown in Fig. 3, by pulling pressing tongs handle 21, come imposed load with the stretching style 41 of fastening fracture.Next the movable platform 05 that promotes right side is close to U-shaped bearing 04, and the circular base slab 07 on the left of rotating is finely tuned sample so that connect section.After making section overlap, tighten the positioning knob 06 of movable platform.For the ductile rupture sample that has more obvious shear lip, only need in the gap of movable platform 05 and chuck component 02, install several constant force spring sheets additional, just can by the elastic potential energy of its release, make section closely engage; If fracture surface of sample exists the more serious projection tissue of tearing, can be first with hand hammer, knock after movable platform 05 row again and fix.
After connecting the tensile sample 41 of fracture, need to select and have no progeny the null position of gauge length and indicate this line with chalk.First whole location survey arm 03 is gone to parallel with the axis direction of the sample 41 that ruptures, after opening laser head power supply 40, movable stand base 37, make cross curve laser fixedly penetrate a cross curve of 28 outgoing 43 and be centered close on the zero mark line that chalk is indicated just now, and tighten base positioning knob 38.Next the mobile cross curve laser being connected with digital display module 32 movably penetrates 31, with the have no progeny summit of gauge length of the cross curve centralized positioning of its ejaculation.The position of this place gauge length line can be converted into length parameter corresponding on reflecting grating tablet 30.These data are read by the capacitor grid transducer part in digital display module 32, and the result of the final output of its display panel is extensibility value.
In the time will measuring reduction of area, swinging mounting 33 makes location survey arm 03 vertical with the axis direction of the tensile sample 41 of fracture, then pulls angle block of right angle 39, makes guide rail 01 enter the bending part of support 33.Similar when telltale mark line and reading numerical values and measurement extensibility afterwards, the two final implementation result is as shown in two of Fig. 7, Fig. 8 embodiment.
Claims (3)
1. quick-clamping is measured a device for metal stretching sample extensibility and reduction of area, it is characterized in that: guide rail, two groups of chuck components, location survey arm, U-shaped bearing, movable platform, platform positioning knob, two circular base slabs and two rectangle back up pads, consist of; Left side chuck component is mounted between two circular base slabs, right side chuck component is mounted between two rectangle back up pads, the former injects the U-shaped bearing that is fixed on guide rail left end, the latter is placed on the movable platform on guide rail right side, movable platform is arranged on guide rail and can slides along guide rail, the base of location survey arm is connected with guide rail by an angle block of right angle, and platform positioning knob is arranged on movable platform;
Described chuck component is by rectilinear quick pressing tongs, pressure head component, plate endured in I font, rocking arm, rocking shaft, V-arrangement jaw, back-moving spring and spring base, case assembles, wherein rectilinear quick pressing tongs is arranged on respectively in circular base slab and rectangle back up pad, pressure head component is fixed on the U-shaped pressure handle of rectilinear quick pressing tongs, and put in case inside, the place ahead of pressure head component is that plate endured in I font, two rocking arms are arranged on case by rocking shaft symmetrically, rocking arm one end props up very plate, its other end puts in the G shape stopper slot that jaw afterbody outputs, spring base level is to being fixed on case, jaw is placed in the both sides up and down of spring base, two jaws are connected with spring base by back-moving spring, on the surface of contact of jaw both sides and case, output respectively a guide-track groove, jaw embeds in the guide-track groove of its both sides by the pin of square-section,
Described location survey arm by cross curve laser fixedly penetrate head, laser head deck, reflecting grating tablet, cross curve laser movably penetrate head, digital display module, support, rotation axis, laterally screens slide block, longitudinally screens slide block, stand base, base positioning knob, angle block of right angle, laser head power supply form, wherein cross curve laser fixedly penetrate head be arranged in laser head deck, this laser head deck is fixed on the null position of reflecting grating tablet; Cross curve laser is movably penetrated head and is arranged in another laser head deck, this laser head deck and digital display module are bonded together, and be arranged on screen and can extend to slip along screen, screen is fixed on the top of support, the bottom of support is fixed on rotation axis, support and the guide rail part outward in sustained height, rotation axis inserts in the cylinder groove of stand base, on stand base, output twice sliding tray, in groove, be inserted with respectively horizontal screens slide block and longitudinal screens slide block, base positioning knob is arranged on angle block of right angle and is connected to stand base.
2. a kind of quick-clamping according to claim 1 is measured the device of metal stretching sample extensibility and reduction of area, it is characterized in that: described pressure head component is comprised of double threaded screw, pressure head setscrew nut, regulating spring, pressure head body and stop nut, whole pressure head is fixed on the U-shaped pressure handle of pressing tongs by two setscrew nuts on double threaded screw top, between setscrew nut and pressure head body, insert regulating spring, and be screwed into stop nut at double threaded screw end.
3. a kind of quick-clamping according to claim 1 and 2 is measured the device of metal stretching sample extensibility and reduction of area, it is characterized in that: described laser head deck is semicircle column type hollow sleeve holder structure.
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| CN201310009820.2A CN103091163B (en) | 2013-01-11 | 2013-01-11 | Device for measuring elongation and cross section shrink rate of metal stretching sample through fast clamping |
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| CN201310009820.2A CN103091163B (en) | 2013-01-11 | 2013-01-11 | Device for measuring elongation and cross section shrink rate of metal stretching sample through fast clamping |
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| CN104330315A (en) * | 2014-11-06 | 2015-02-04 | 重庆戴卡捷力轮毂制造有限公司 | Device for rapidly measuring percentage elongation of tensile test bar |
| CN104568608B (en) * | 2014-12-22 | 2017-02-22 | 曹中跃 | Spiral elasticity detection device for electric heating wire of electric hair drier |
| CN106353182A (en) * | 2016-10-25 | 2017-01-25 | 红河学院 | Measuring device for scale distance after tensile failure in tensile test |
| CN106644772B (en) * | 2017-02-20 | 2023-10-13 | 中核(天津)科技发展有限公司 | Metal material elongation detecting and positioning device |
| CN106920436B (en) * | 2017-03-03 | 2019-02-15 | 衢州学院 | A kind of mechanics of materials distortional stress demonstration teaching aid |
| CN108507876A (en) * | 2018-04-03 | 2018-09-07 | 江苏科泰检测技术服务有限公司 | Aluminum steel composite material mechanical properties detection method |
| CN108414358A (en) * | 2018-05-23 | 2018-08-17 | 中国原子能科学研究院 | A kind of device measuring tensile sample elongation after fracture and the contraction percentage of area |
| CN108931423A (en) * | 2018-05-23 | 2018-12-04 | 中国原子能科学研究院 | A method of measurement tensile sample elongation after fracture and the contraction percentage of area |
| CN110118691B (en) * | 2019-06-11 | 2022-07-15 | 成渝钒钛科技有限公司 | Elongation test method after fracture with original gauge length mantissa of 5 |
| CN110132730A (en) * | 2019-06-14 | 2019-08-16 | 深圳市华太检测有限公司 | The detection clamping device of the metal material stretching test contraction percentage of area |
| CN110595873B (en) * | 2019-09-10 | 2023-06-16 | 华中科技大学 | Tensile sample gauge length and post-fracture gauge length measuring equipment |
| CN111006725B (en) * | 2020-01-06 | 2020-11-06 | 深圳市美信检测技术股份有限公司 | Direct current line wire rod tensile property check out test set |
| CN112304784A (en) * | 2020-10-23 | 2021-02-02 | 江苏永钢集团有限公司 | Automatic measuring device for surface shrinkage and elongation of tensile sample |
| CN114235581A (en) * | 2021-12-20 | 2022-03-25 | 武汉一冶钢结构有限责任公司 | Device and method for accurately measuring test parameters |
| CN115326549B (en) * | 2022-10-17 | 2022-12-09 | 新亚新智能科技(南通)有限公司 | Testing machine for testing performance of carbon fiber composite material |
| CN117191583B (en) * | 2023-11-07 | 2024-02-02 | 徐州宏巨机械制造有限公司 | Iron casting intensity detection device |
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| JP3595849B1 (en) * | 2003-06-30 | 2004-12-02 | 関西ティー・エル・オー株式会社 | Fatigue test equipment for micro / nano materials |
| CN101876609B (en) * | 2009-06-12 | 2013-05-08 | 赵宏伟 | Micron-nano scale in-situ nano indentation and scratching test system |
| CN101629885B (en) * | 2009-07-07 | 2011-06-29 | 清华大学 | Double probe micro nanometer mechanics detecting system |
| CN102230865B (en) * | 2011-04-02 | 2012-08-22 | 赵宏伟 | Trans-scale micro-nano scale in situ tension compression mechanical property test platform |
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