CN108414355B - Film stretching and loading unit with position locking function - Google Patents
Film stretching and loading unit with position locking function Download PDFInfo
- Publication number
- CN108414355B CN108414355B CN201810141810.7A CN201810141810A CN108414355B CN 108414355 B CN108414355 B CN 108414355B CN 201810141810 A CN201810141810 A CN 201810141810A CN 108414355 B CN108414355 B CN 108414355B
- Authority
- CN
- China
- Prior art keywords
- loading
- film
- locking function
- turntable
- rotary table
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 229910052751 metal Inorganic materials 0.000 claims description 5
- 239000002184 metal Substances 0.000 claims description 5
- 230000005389 magnetism Effects 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 239000007769 metal material Substances 0.000 claims 2
- 239000010408 film Substances 0.000 description 43
- 238000000034 method Methods 0.000 description 14
- 230000008569 process Effects 0.000 description 14
- 238000012360 testing method Methods 0.000 description 13
- 239000000758 substrate Substances 0.000 description 12
- 230000033001 locomotion Effects 0.000 description 8
- 239000000463 material Substances 0.000 description 8
- 238000002474 experimental method Methods 0.000 description 7
- 230000007246 mechanism Effects 0.000 description 6
- 230000005540 biological transmission Effects 0.000 description 5
- 230000008901 benefit Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 239000012528 membrane Substances 0.000 description 3
- 239000010409 thin film Substances 0.000 description 3
- 238000013519 translation Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000011065 in-situ storage Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 238000004544 sputter deposition Methods 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- 229910000617 Mangalloy Inorganic materials 0.000 description 1
- 208000032370 Secondary transmission Diseases 0.000 description 1
- 241001417871 Silurus asotus Species 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000003889 chemical engineering Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- ZBJWWKFMHOAPNS-UHFFFAOYSA-N loretin Chemical compound C1=CN=C2C(O)=C(I)C=C(S(O)(=O)=O)C2=C1 ZBJWWKFMHOAPNS-UHFFFAOYSA-N 0.000 description 1
- 229950010248 loretin Drugs 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000012552 review Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000009864 tensile test Methods 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- 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
- G01N3/02—Details
- G01N3/06—Special adaptations of indicating or recording means
- G01N3/068—Special adaptations of indicating or recording means with optical indicating or recording means
-
- 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
- G01N2203/0014—Type of force applied
- G01N2203/0016—Tensile or compressive
- G01N2203/0017—Tensile
-
- 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
- G01N2203/025—Geometry of the test
- G01N2203/0254—Biaxial, the forces being applied along two normal axes of the specimen
-
- 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
- G01N2203/026—Specifications of the specimen
- G01N2203/0262—Shape of the specimen
- G01N2203/0278—Thin specimens
- G01N2203/0282—Two dimensional, e.g. tapes, webs, sheets, strips, disks or membranes
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/0641—Indicating or recording means; Sensing means using optical, X-ray, ultraviolet, infrared or similar detectors
Landscapes
- 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 provides a film stretching and loading unit with a position locking function, which comprises a base plate, a motor, a worm and gear assembly, a loading turntable, a fastening clamping piece and a turntable positioning piece, wherein the base plate is provided with a first positioning hole and a second positioning hole; the motor is fixedly arranged on the base plate, the worm and gear assembly is rotatably and fixedly arranged on the base plate, the worm is connected with an output shaft of the electrode and transmits the rotation output by the motor to the turbine, a fan-shaped groove is formed in one side surface of the turbine, the vertical section of the loading rotary table is the same as that of the fan-shaped groove, so that one end of the loading rotary table can be inserted into the groove, the turbine can drive the loading rotary table to rotate synchronously, the film sample to be tested is fixed on the loading rotary table through the fastening clamping piece, and the loading rotary table can drive the film sample to rotate synchronously so as to pull the film sample to turn upwards and outwards; the base plate is provided with a positioning groove, and the positioning piece can be inserted into the positioning groove to limit the axial rotation of the loading rotary table.
Description
Technical Field
The invention relates to the field of film material performance testing, in particular to a tensile test of a soft base film.
Background
In recent years, soft base thin film materials are widely used in the fields of electronics, biology, aerospace, chemical engineering and the like due to the maturity of manufacturing processes and the excellence of high flexibility, high ductility and the like. Therefore, this structure is becoming an important research point for researchers. Most of related work at the present stage is developed aiming at unidirectional loading of a membrane-based structure, however, in the service process, the membrane-based structure is often in a more complex loading environment, and a simple uniaxial load cannot simulate the real stress state of the membrane-based structure. Therefore, in experiments and tests, the introduction of biaxial load enables the mechanical behavior of the film-based structure to be more accurately expressed, which is important for studying the mechanical properties of the film-based structure.
A good loading device capable of simulating various complex loading environments is the basis of the tensile experiment. The film material loading unit generally comprises a motor, a transmission mechanism, a loading rotary table and a control system. At present, many scholars design and make a large amount of single-axis loading units with ingenious structures, and the devices can be suitable for various complicated load environments and observation environments, so that a better experiment effect is achieved. However, most of these devices adopt a translation stretching scheme, and the large occupied space during the operation of the devices causes the devices to be difficult to place on the stage of a microscope, especially when the existing loading unit is combined and used in a biaxial stretching experiment.
Early biaxial tensile testers were proposed by Ferron and Makinde in 1988. They have designed a linkage mechanism to modify a conventional uniaxial tensile tester into a biaxial tensile tester. However, the device is connected through eight mechanical connecting rods, and a complex transmission mechanism has a large influence on the load output and the loading precision of the equipment. In the review of the stretching apparatus by Alan Hannon in 2005, Fraunhofe also experimented with biaxial loading by a link mechanism, but the apparatus was large in size and large in height drop, and was difficult to observe in a small range. In recent years, some scholars have designed smaller sized dual axis loading equipment to fit precision microscopes and various modern microscopic measurement techniques such as DIC, XRD. Geandier G designed a set of rotary type biax loading equipment in 2010, controlled through four motors, had the advantage that the size is little, and drive mechanism is simple. But the test piece size is bigger, and the experiment cost is higher. Namazu designs a set of biaxial loading equipment suitable for film material stretching, and the biaxial loading equipment is matched with a CCD camera for observation. This equipment has a large output load, but this also makes it large in size and also heavy overall. In 2015, a double-shaft in-situ loading device is developed by the material college of the oxford university, and deformation of sheet materials can be measured through transmission of a lead screw nut. However, the loading device is provided with a motor in only one direction, so that the loading process is influenced by mechanical loss, and the device can only carry out biaxial geometric loading. In 2017, Petegem changes the traditional motor control mode in order to reduce the size of the double-shaft loading equipment, and adopts a piezoelectric ceramic driver as power output, so that the weight and the size of the equipment are greatly reduced, and meanwhile, the extremely high precision can be ensured. But the disadvantage is that the load output of the equipment is very small, and the equipment is difficult to be applied to the stretching of materials such as metal film base structures. In recent years, in China, some scholars design some double-shaft loading equipment, but the size and the weight are large.
In summary, referring to fig. 1, the conventional film stretch-loading apparatus has the following problems: a. the translation stretching causes the overall size of the equipment to be too large and the equipment is difficult to place on an observation platform of a microscope; b. the disclosed rotary stretching device has a large cylindrical turntable size, and the contact surface of a fixed test piece is difficult to keep horizontal in the process of fixedly mounting the test piece, and the operation is mainly based on experience; c. the test piece is difficult to clamp after being fixed; d. for the samples to be measured with different elastic modulus and thickness, the rotary tables with different diameters need to be replaced as required, and the operation process is complicated and time-consuming.
Disclosure of Invention
The invention provides a film stretching and loading unit with a position locking function, which comprises a base plate, a motor, a worm and gear assembly, a loading turntable, a fastening clamping piece and a turntable positioning piece, wherein the base plate is provided with a first positioning hole and a second positioning hole;
the motor is fixedly arranged on the base plate, the worm and gear assembly is rotatably and fixedly arranged on the base plate, the worm is connected with an output shaft of the electrode and transmits the rotation output by the motor to the turbine, a fan-shaped groove is formed in one side surface of the turbine, the vertical section of the loading rotary table is the same as that of the fan-shaped groove, so that one end of the loading rotary table can be inserted into the groove, the turbine can drive the loading rotary table to rotate synchronously, the film sample to be tested is fixed on the loading rotary table through the fastening clamping piece, and the loading rotary table can drive the film sample to rotate synchronously so as to pull the film sample to turn upwards and outwards;
the base plate is provided with a positioning groove, and the positioning piece can be inserted into the positioning groove to limit the axial rotation of the loading rotary table.
Drawings
Some specific embodiments of the invention will be described in detail hereinafter, by way of illustration and not limitation, with reference to the accompanying drawings. The same reference numbers in the drawings identify the same or similar elements or components. Those skilled in the art will appreciate that the drawings are not necessarily drawn to scale.
FIG. 1 is a schematic view of a conventional film stretch-loading unit;
FIG. 2 is a schematic view of the film stretching and loading unit of the present invention, wherein the direction indicated by the dotted arrow is the rotation direction of the loading turntable when stretching the film sample to be tested;
FIG. 3 is a schematic view of the film stretching and loading unit of the present invention, wherein the direction indicated by the dotted arrow is the rotation direction of the loading turntable when stretching the film sample to be tested, and the installation or setting manner of the positioning element can be seen;
FIG. 4 is an overall schematic view of an assembled film stretching and loading unit of the present invention, wherein the loading turntable has been inserted into a fan-shaped groove formed at one side of the turbine, the positioning element has been inserted into a positioning groove formed on the substrate, and at this time, the clamping surface of the loading turntable remains parallel to the substrate, so that the operation of clamping the film sample to be tested can be performed;
FIG. 5 is a top view of an assembled film stretch loading unit of the present invention wherein one face of the positioning member is in engagement with a vertical side of the loading turret such that the loading turret cannot rotate;
fig. 6 shows the fastening clip 6 provided with the buffer layer 13, wherein the buffer layer 12 is used for increasing the friction force between the fastening clip 6 and the film sample to be measured, so that the film sample to be measured is fixed on the loading turntable 5 more firmly and is not easy to slip;
FIG. 7 is a schematic view of the clamping contact surface of the loading turret being serrated to increase the clamping contact area;
fig. 8 is a schematic view of a loading turret and fastening clip with serrated contact surfaces.
In the above drawings: (1) the device comprises a base plate, (2) a motor, (3) a worm, (4) a turbine, (5) a loading turntable, (6) a fastening clamping piece, (7) a positioning groove, and (8) a cylindrical arm.
Detailed Description
As shown in fig. 2, the invention provides a film stretching and loading unit with a position locking function, which comprises a substrate 1, a motor 2, a worm 3, a worm wheel 4, a loading turntable 5, a fastening clamping sheet 6 and a positioning member 9, wherein the motor 2 is fixedly arranged on the substrate 1, an output shaft of the motor 2 is connected with the worm 3 and drives the worm 3 to rotate, and the worm 3 and the worm wheel 4 are installed in a matched manner and drive the worm wheel 4 to rotate;
one end of the turbine is rotatably arranged on the base plate 1, the other end of the turbine is provided with a groove, the vertical section of the groove is the same as the vertical section of the loading rotary table 5 in shape, one end of the loading rotary table 5 can be inserted into the groove so that the turbine 4 drives the loading rotary table 5 to rotate, and the other end of the loading rotary table 5 is provided with a cylindrical arm 8 so that the loading rotary table 5 can be rotatably arranged on the base plate 1 and the axis of the loading rotary table 5 is kept horizontal in the rotating process; bearings and/or bearing sleeves may be provided at one end of the worm 3, the worm wheel 4 and the loading turntable 5 to ensure that the rotation axis thereof is parallel to the base plate 1, i.e. to ensure that the base plate is in a balanced state during rotation; a positioning groove 7 is formed on the substrate 1, and the positioning member 9 can be inserted into the positioning groove 7 to limit the axial rotation of the loading turntable.
Specifically, in the process of clamping the film test piece to be tested on the surface, parallel to the substrate 1, of the loading turntable 5, the loading turntable 5 needs to be kept horizontal or parallel to the substrate 1 in the whole clamping process, and a load needs to be applied to the loading turntable 5 in the whole clamping process, so that the loading turntable 5 can be ensured not to rotate in the clamping process only through experience or a complex fixing structure in the past. According to the present invention, however, the loading turntable 5 can be restricted from rotating about the axis by the shape of the loading turntable 5 by merely inserting the positioning member 9 into the positioning groove 7 provided on the base plate 1. The vertical section of the loading turret 5 is in the shape of a sector with an angle of 45 °, and the horizontal plane, the vertical plane (i.e. the main vertical plane, rather than the two parallel vertical side surfaces, hereinafter referred to as "vertical plane"), the curved surface, and the two vertical side surfaces perpendicular to the base plate 1 of the loading turret 5 together form the loading turret 5 with respect to the base plate 1. The direction of the broken line arrow in fig. 2 is the rotational direction in the operation of the film stretching-loading unit of the present invention. It should be noted that although the motor 2 is usually a stepping motor with a self-locking function in practice, the stepping motor itself with a braking torque (static self-locking torque) often cannot meet the requirement of keeping the loading turntable 5 horizontal or parallel to the substrate 1 during the whole clamping process.
Although the positioning groove 7 and the positioning member 9 are added, the thickness of the substrate 1 is generally not more than 1cm, so that the depth of the positioning groove 7 is generally not more than 8mm, and in order to ensure that the positioning member 9 can be firmly fixed in the positioning groove 7, the part of the positioning member 9 inserted into the positioning groove 7 can be magnetized, so that the connecting force between the positioning groove 7 and the positioning member 9 is increased through magnetic attraction; alternatively, the positioning groove 7 may be magnetized or both the positioning groove 7 and the positioning member 9 may be magnetized anisotropically to increase the coupling force between the positioning groove 7 and the positioning member 9 by magnetic attraction. Alternatively, the bottom area of the positioning slot 7 is increased, the direction of the positioning slot is changed, and the shape of the positioning piece 9 is changed.
Preferably, the positioning groove 7 may be provided as a narrow groove perpendicular to the rotation axis of the loading turntable 5, and has a depth of 1 to 8mm or 5 to 90% of the thickness of the substrate.
In addition, in order to reduce the volume of the positioning part 9 and avoid influencing the clamping of the test piece, the distance between the central rotating shaft of the loading rotary table 5 and the substrate 1 is generally 100% -120% of the side length of the sector of 45 degrees, so that the loading rotary table 5 is not touched with the substrate 1 in the rotating process, the volume of the positioning part 9 can be reduced to the maximum extent, and the whole equipment is simpler and more reliable. Wherein the main section of the positioning element 9 may be triangular, circular, rectangular, etc., for better clarity of illustration, fig. 2 to 5 only show examples of rectangles, in which the positioning slot 7 is a rectangular elongated slot parallel to the rotation axis of the loading turret 5, in practice, in some cases, it may be better to arrange the positioning slot 7 as a rectangular elongated slot perpendicular to the rotation axis of the loading turret 5
The loading turret 5 and/or the groove of the turbine 4 are magnetic, so that the fixation is more secure after the insertion of the loading turret 5 into the groove of the turbine 4, i.e. said turbine 4 generates an axial constraint of the loading turret 5 and at the same time a radial constraint, so as to achieve the aim of a quick change of the loading turret 5.
Preferably, the thin film test piece to be measured is tightly clamped between the loading turntable 5 and the fastening clip 6 by screws, usually by providing the fastening clip 6 with screw holes (conventional technical means, not shown), but the problems with screws are obvious, namely, the thin film is easily damaged, and stress concentration is easily generated around the screw holes when the screws are over-tightened. In order to improve the distribution of stress near the screw holes and increase the clamping force and the friction force between the loading turntable 5 and the fastening clamping sheet 6, the invention also provides a novel fastening clamping sheet 6, and the specific scheme is as follows: the loading turntable 5 is made of metal with magnetism or can be attracted with the magnetism, the fastening clamping sheet 6 is made of magnetic steel or magnetized metal, as shown in fig. 6, a buffer layer 13 with the thickness of 0.1-1 mm is arranged on the surface of the fastening clamping sheet 6, which is in contact with the loading turntable 5, and the buffer layer 13 can be made of rubber or high polymer material such as PVC plastic through high-temperature spraying or sputtering.
Preferably, the contact surfaces of the loading turntable 5 and the fastening clip 6 can be as shown in fig. 7, the upper surface of the loading turntable 5 for contacting the film sample to be tested and the lower surface of the fastening clip 6 for contacting the film sample to be tested have saw-toothed surfaces which are matched with each other, the contact surfaces of the fastening clip 6 and the loading turntable 5 are arranged in a saw-toothed shape, and three edges (top edge and two bottom edges) of the saw-toothed shape are parallel to the axis of the loading turntable. More preferably, the two surfaces are both provided with a buffer layer with the thickness of 0.1-1 mm by spraying, pasting or sputtering. The sawteeth of the sawtooth surface are uniformly distributed, as shown in fig. 8, the vertical section of the loading rotary table 5 is in a sector shape with an angle of 45 degrees, and the inclination angle of the sawteeth is 45 degrees, so that the space is saved to the maximum extent, the clamping contact surface of the film sample is increased, and according to experimental operation, the thickness of the film sample to be tested is 0.01-2 mm, and the height h of the sawteeth is preferably set to be 1-6 mm.
Preferably, the loading device is further provided with a control module (not shown) for controlling the motor 2, wherein the control module can be written with programs so as to control the rotation speed and the stroke parameters of the motor 2 and control the rotation of the motor. In fact, the above mentioned metals with magnetic or magnetizable properties are usually made of cast iron or manganese steel or magnetic steel, considering the cost during the manufacturing process.
As the control module, a WNMC400-400B type motion controller provided by Beijing micro-nano company can be adopted. The synchronous and consistent stepping motor is ensured by a specific coding mode when rotating. The motion controller is a four-dimensional step controller, can simultaneously control a plurality of motors and can also independently control one motor, so that various working conditions such as uniaxial stretching, biaxial stretching, equal-ratio stretching, unequal-ratio stretching of double shafts in any proportion, even unilateral stretching and the like can be realized. The controller can set parameters such as pulse equivalent, movement speed, movement distance, signal level and the like through an operation panel or computer software, and supports the movement of a program segment, the pause time of the movement gap can be self-determined, and the requirement of gradual loading observation in a film material stretching experiment is met. In addition, the matched software also has a corresponding function library, so that various motion control programs can be conveniently compiled.
The motor 2 can adopt a 28-step motor, the output torque is 0.12 N.m, the minimum angle resolution is 0.09 degrees, the transmission ratio of the worm gear assembly is 18, and the worm 3 is connected with the motor 2 or arranged on the output shaft of the motor 2.
The invention adopts the worm gear mechanism to carry out simple secondary transmission, and achieves the following effects: the worm and gear assembly has a self-locking function, and after single-step stretching loading, when the motor 2 stops rotating, the loading rotary table 5 can be ensured not to rotate reversely under the action of the tensile force of the film, zero resilience is realized, and the loading reliability is ensured; the worm gear assembly has a load amplification function, so that the output load of the motor 2 is amplified, and sufficient power is ensured; the worm gear assembly positions the film to be detected at a higher horizontal position, so that great convenience is provided for downward observation of the microscope lens; the worm gear assembly enables the loading shaft at the edge of the equipment to move axially, so that the sizes of a clamping area and a test piece are effectively reduced, and the reliability and the economical efficiency of an experiment are improved.
In practical use, the film test loading units provided by the invention are generally arranged in a central symmetry manner, and vertically arranged end to end in a grounding manner to form a square space for accommodating a film to be tested, so that the 4 loading rotary tables 5 can realize two-to-two relative movements in four different horizontal directions in the horizontal direction, and the biaxial stretching loading of the film to be tested is realized. In order to realize the synchronous operation of loading and observation, an observation device such as a CCD, a CMOS, or the like may be disposed above the film to be measured to capture the change of the film to be measured during the stretching process, and the change of the physical parameters of the film to be measured may be obtained by the DIC principle.
The observation and measurement system is an external matching system of the equipment. The loading unit and the combination thereof provided by the invention can be placed on an objective table of an Olympus confocal microscope, the surface appearance of the film is observed in situ in real time by using the microscope, and meanwhile, a camera is placed below and/or above the loading unit to measure the real-time displacement in the film stretching process. The confocal microscope has high precision and rapid focusing, and can easily achieve observation of submicron level; the camera and DIC technology can be used for measuring the film strain in the observation area of the microscope accurately in real time in a non-contact manner and with high response. In conclusion, the invention has the advantages of good control system synchronism, large output load, simple and compact transmission structure, small size of the test piece positioned above the equipment, clamping and fastening, advanced observation system and the like.
The invention has the advantages that the translation stretching of the traditional stretching loading unit is changed into the rotation stretching, so that the overall size of the equipment is greatly reduced, and the equipment structure is simplified; secondly, a device for fixing the clamping rotary table is provided, so that the loading surface (clamping surface) of the rotary table can be kept horizontally fixed in the test piece clamping process, and the operation efficiency is improved; thirdly, a clamping piece structure with magnetism is provided to increase the clamping force of the clamping piece and improve the stress distribution state around the screw, the contact area between the state and the clamping piece is increased by arranging the contact surface into a sawtooth shape, and meanwhile, the clamping friction force is further increased by arranging a flexible buffer layer on the surface of the contact surface; finally, by improving the section shape of the loading rotary table, parts such as a coupler and the like which are commonly used in the prior art are omitted, so that different loading rotary tables can be conveniently replaced aiming at different film samples, and the replacement operation is simplified.
Thus, it should be appreciated by those skilled in the art that while a number of exemplary embodiments of the invention have been illustrated and described in detail herein, many other variations or modifications consistent with the principles of the invention may be directly determined or derived from the disclosure of the present invention without departing from the spirit and scope of the invention. Accordingly, the scope of the invention should be understood and interpreted to cover all such other variations or modifications.
Claims (10)
1. A film stretching and loading unit with a position locking function comprises a base plate, a motor, a worm and gear assembly, a loading rotary table, a fastening clamping piece and a positioning piece; the film to be tested is fixed on the loading rotary table through a fastening clamping piece made of magnetic steel or magnetized metal, so that the loading rotary table can drive a film sample to rotate to pull the film sample to rotate;
the base plate is provided with a positioning groove, and the positioning piece can be inserted into the positioning groove to limit the rotation of the loading rotary table when the film sample is clamped.
2. The film stretching-loading unit having a position locking function as claimed in claim 1, wherein a vertical section of said sector groove is a sector having a central angle of 45 ° and a distance of a central rotation axis of said loading turntable from said base plate is 100% to 130% of a side length of said sector.
3. The film tension-loading unit having a position locking function according to claim 1 or 2, wherein the horizontal cross section of the positioning groove is rectangular, circular or fan-shaped.
4. The film stretch-loading unit with position locking function according to claim 1 or 2, wherein the horizontal cross section of the positioning groove is a square or a rectangle whose long side is perpendicular to the rotation axis of the loading turntable.
5. The film tension-loading unit with position-locking function according to claim 1 or 2, wherein the positioning groove and the positioning member have different magnetism and can attract each other to enhance the positioning force.
6. The film stretch-loading unit with position-locking function according to claim 1 or 2, wherein the motor is a 28-step motor, and the minimum angular resolution is 0.09 °.
7. The film tension-loading unit having a position locking function according to claim 1 or 2, wherein the sector groove and the loading turntable are made of a magnetizable metal material so that the sector groove and the loading turntable can attract each other.
8. The film tension-loading unit with position locking function according to claim 1 or 2, wherein the fastening jaw and the loading turntable are made of magnetizable metal material so that the fastening jaw and the loading turntable can attract each other.
9. The film stretching and loading unit having a position locking function according to claim 1 or 2, wherein a contact surface of the fastening jaw with the loading turntable is provided in a zigzag shape, an edge of the zigzag is parallel to an axis of the loading turntable, an inclination angle of the zigzag is 45 °, and a height of the zigzag is 1 to 6 mm.
10. The film tension loading unit with position locking function according to claim 1 or 2, wherein the contact surface surfaces of the fastening jaw and the loading turntable are each provided with a buffer layer for increasing the friction force with the film sample, and the buffer layer is made of rubber or PVC plastic.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810141810.7A CN108414355B (en) | 2018-02-11 | 2018-02-11 | Film stretching and loading unit with position locking function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810141810.7A CN108414355B (en) | 2018-02-11 | 2018-02-11 | Film stretching and loading unit with position locking function |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108414355A CN108414355A (en) | 2018-08-17 |
| CN108414355B true CN108414355B (en) | 2021-03-23 |
Family
ID=63128439
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810141810.7A Expired - Fee Related CN108414355B (en) | 2018-02-11 | 2018-02-11 | Film stretching and loading unit with position locking function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108414355B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108802351B (en) * | 2018-09-04 | 2023-12-01 | 山东交通学院 | Lock block type single-double-shaft conversion device for pavement acceleration loading test equipment |
| CN112903432B (en) * | 2021-01-18 | 2022-07-26 | 吉林大学 | Dentistry diaphragm elastic recovery testing arrangement |
| CN114778303B (en) * | 2022-06-20 | 2022-09-02 | 新沂崚峻光电科技有限公司 | Laser film tension detection device and detection method |
Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1731135A (en) * | 2005-08-15 | 2006-02-08 | 清华大学 | Film stretching loading device under scanning microscopy environment and film distortion measurement method |
| CN102221499A (en) * | 2011-03-29 | 2011-10-19 | 天津大学 | Alignment loading device used for stretching test of nanoscale, micron-size thin film materials |
| CN102645370A (en) * | 2012-04-12 | 2012-08-22 | 吉林大学 | Biaxial stretching/compression mode scanning electron microscope mechanical test device |
| CN103091164A (en) * | 2013-01-15 | 2013-05-08 | 天津大学 | Double-system stretching device applicable to micro-nanometer thin film material |
| CN103308404A (en) * | 2013-06-14 | 2013-09-18 | 吉林大学 | In-situ nano-indentation tester based on adjustable stretching-bending preload |
| CN103528887A (en) * | 2013-10-24 | 2014-01-22 | 吉林大学 | In-situ pull/press-torque combined load material micromechanics test platform |
| CN104990794A (en) * | 2015-07-09 | 2015-10-21 | 东北大学 | Tension-torsion testing machine and testing method thereof |
| CN105181500A (en) * | 2015-09-15 | 2015-12-23 | 吉林大学 | Stretching-bending combined-load in-situ nano-indentation test device and method |
| CN103940667B (en) * | 2014-03-27 | 2016-01-13 | 上海交通大学 | Multi-function membrane triaxial extension test machine and test method |
| CN105571808A (en) * | 2016-02-26 | 2016-05-11 | 浙江理工大学 | Clamp with all-freedom constraints for impact fatigue testing machine |
| CN205404298U (en) * | 2016-02-24 | 2016-07-27 | 三峡大学 | Core axial tension turns round performance detection device |
| CN106353200A (en) * | 2016-10-17 | 2017-01-25 | 合肥工业大学 | Worm wheel- worm lead screw transmission type two-way stretch test machine |
| CN106908311A (en) * | 2017-03-14 | 2017-06-30 | 西南交通大学 | A kind of power thermal coupling loading device in situ and test method based on EBSD analyses |
| CN206677542U (en) * | 2017-03-06 | 2017-11-28 | 天津职业技术师范大学 | Assembly tooling with overload protection drive axle |
-
2018
- 2018-02-11 CN CN201810141810.7A patent/CN108414355B/en not_active Expired - Fee Related
Patent Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1731135A (en) * | 2005-08-15 | 2006-02-08 | 清华大学 | Film stretching loading device under scanning microscopy environment and film distortion measurement method |
| CN102221499A (en) * | 2011-03-29 | 2011-10-19 | 天津大学 | Alignment loading device used for stretching test of nanoscale, micron-size thin film materials |
| CN102645370A (en) * | 2012-04-12 | 2012-08-22 | 吉林大学 | Biaxial stretching/compression mode scanning electron microscope mechanical test device |
| CN103091164A (en) * | 2013-01-15 | 2013-05-08 | 天津大学 | Double-system stretching device applicable to micro-nanometer thin film material |
| CN103308404A (en) * | 2013-06-14 | 2013-09-18 | 吉林大学 | In-situ nano-indentation tester based on adjustable stretching-bending preload |
| CN103528887A (en) * | 2013-10-24 | 2014-01-22 | 吉林大学 | In-situ pull/press-torque combined load material micromechanics test platform |
| CN103940667B (en) * | 2014-03-27 | 2016-01-13 | 上海交通大学 | Multi-function membrane triaxial extension test machine and test method |
| CN104990794A (en) * | 2015-07-09 | 2015-10-21 | 东北大学 | Tension-torsion testing machine and testing method thereof |
| CN105181500A (en) * | 2015-09-15 | 2015-12-23 | 吉林大学 | Stretching-bending combined-load in-situ nano-indentation test device and method |
| CN205404298U (en) * | 2016-02-24 | 2016-07-27 | 三峡大学 | Core axial tension turns round performance detection device |
| CN105571808A (en) * | 2016-02-26 | 2016-05-11 | 浙江理工大学 | Clamp with all-freedom constraints for impact fatigue testing machine |
| CN106353200A (en) * | 2016-10-17 | 2017-01-25 | 合肥工业大学 | Worm wheel- worm lead screw transmission type two-way stretch test machine |
| CN206677542U (en) * | 2017-03-06 | 2017-11-28 | 天津职业技术师范大学 | Assembly tooling with overload protection drive axle |
| CN106908311A (en) * | 2017-03-14 | 2017-06-30 | 西南交通大学 | A kind of power thermal coupling loading device in situ and test method based on EBSD analyses |
Non-Patent Citations (3)
| Title |
|---|
| 《利用蜗轮蜗杆传动装置车削轮缘上的凹圆弧面》;王晓华等;《重型机械》;19980430(第2期);第55页 * |
| 《北京同步辐射软X射线偏振测量装置及其应用》;崔明启等;《核技术》;20091031;第32卷(第10期);第721-724页 * |
| 《柔性基底上含过渡层纳米薄膜在双向拉伸下断裂损伤的实验研》;李林安等;《实验力学》;20171231;第32卷(第6期);741-750页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108414355A (en) | 2018-08-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108414355B (en) | Film stretching and loading unit with position locking function | |
| CN106525571B (en) | Microscope stretcher suitable for optical microscope | |
| CN104502202B (en) | Online material biaxial static-dynamic performance test platform under service temperature | |
| CN102183418B (en) | Device for testing micro-torsion mechanical property of low-dimension material | |
| CN104913974A (en) | Material micro-mechanical property biaxial tension-fatigue test system and test method thereof | |
| CN102384875A (en) | Stretching, compression and bending combined load mode material mechanics performance test device under microscope | |
| CN103278386A (en) | Measurement system for thin-film material tension-compression fatigue dynamic loading | |
| CN202330188U (en) | Micro-torsion mechanical property testing device | |
| CN102346117A (en) | Dynamic performance testing device of microradian-level accuracy in-situ torsion material under scanning electronic microscope | |
| CN204009028U (en) | Magnet mgnetic observations device | |
| CN113551980A (en) | Multi-shaft type tensile test testing machine and testing method | |
| CN105158057A (en) | Apparatus and method for testing in-situ triaxial tension fatigue under multi-field coupling | |
| JPH11503516A (en) | Stress cell for scanning probe microscope | |
| CN102401775A (en) | Prestressing thin film contact angle measurement system | |
| JP2017201258A (en) | Fatigue test method, and fatigue test device | |
| US9046548B2 (en) | System for mechanical characterization of materials and biological samples in the sub-millinewton force range | |
| CN108444809B (en) | Thin film test loading unit | |
| CN203606234U (en) | Test unit for researching material uniaxial creep effect | |
| JP3162609U (en) | Thin plate testing machine | |
| CN202351134U (en) | Mechanical performance testing device for material in pull-down bending combined load mode under microscope | |
| CN203287264U (en) | Micro-structure mechanical property piece external-bending testing device | |
| CN206095837U (en) | Two test piece flexural fatigue's of while testing testing machine | |
| CN108444822B (en) | Film torsion stretching loading unit | |
| CN202351137U (en) | Microradian-level precision in-situ twisted material mechanical performance testing device based on scanning electron microscope | |
| CN203101423U (en) | Stretching device matched with atomic force microscopy |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210323 |