CN110618239B - Device and method for testing stiffness and draping bending resistance of polymer - Google Patents
Device and method for testing stiffness and draping bending resistance of polymer Download PDFInfo
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- 238000012360 testing method Methods 0.000 title claims abstract description 126
- 229920000642 polymer Polymers 0.000 title claims abstract description 108
- 238000005452 bending Methods 0.000 title claims abstract description 40
- 238000000034 method Methods 0.000 title claims abstract description 20
- 239000000725 suspension Substances 0.000 claims abstract description 75
- 230000007246 mechanism Effects 0.000 claims abstract description 65
- 239000000523 sample Substances 0.000 claims abstract description 38
- 230000005540 biological transmission Effects 0.000 claims description 48
- 230000005484 gravity Effects 0.000 claims description 5
- 239000004744 fabric Substances 0.000 description 9
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- 239000002131 composite material Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
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- 230000000704 physical effect Effects 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
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- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000005060 rubber Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
- 239000009333 tian-xian Substances 0.000 description 1
- 238000009941 weaving Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/02—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/36—Textiles
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/44—Resins; Plastics; Rubber; Leather
- G01N33/442—Resins; Plastics
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/44—Resins; Plastics; Rubber; Leather
- G01N33/445—Rubber
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Abstract
The invention discloses a device and a method for testing the stiffness and the suspension bending resistance of a polymer, wherein the device comprises a feeding component, a fixed suspension height testing component, a fixed suspension length testing component and a rack, wherein the feeding component, the fixed suspension height testing component and the fixed suspension length testing component are all arranged on the rack and are all positioned below the feeding component, and the fixed suspension height testing component is arranged at the right output end of the fixed suspension length testing component; the fixed suspension height testing assembly comprises a lifting mechanism and an infrared detector, the lifting mechanism is mounted on the rack, and the infrared detector is arranged on a working platform on the lifting mechanism; the fixed overhang length testing assembly comprises a platform support plate jacking mechanism and a testing probe mechanism. The invention can quickly and accurately test the stiffness and the suspension bending resistance of the polymer under two modes of fixed suspension height and fixed suspension length.
Description
Technical Field
The invention relates to the technical field of polymer physical property testing, in particular to a device and a method for testing the stiffness and the draping bending resistance of a polymer.
Background
The polymer can be generally divided into three categories of plastics, rubber and fiber according to the performance, wherein the stiffness and the drape bending resistance of the polymer are important physical parameters for testing the performance of the polymer, and the application direction and the application range of the polymer are influenced to a certain extent. The application environment of the polymer can be guided more scientifically and reasonably through the instrument test and evaluation of the stiffness and the draping bending resistance of the polymer, and the optimal material is matched for the user requirements and the standard requirements of products.
The stiffness and drape flexural properties of polymers are essential characteristics affecting the quality of the polymer, determining the performance properties of the polymer. There have been many studies on the stiffness of Polymers, and a tester for the stiffness of Polymers is reported in the document "Determination of functionalized Polymers to cluster stiffness handle of fabrics by the CHES-FY system" (ZHao-Qun Du, Rui-Qiang Gao, Tian-Xian Zhou, Lin-Ge He, Fibers and Polymers,2013 (10): 1768-1775), and the stiffness of Polymers is expressed by the relationship of the displacement curve of the Polymers under the action of a drawing force by using a CHES-FY comprehensive evaluation system to measure the deformation process of the Polymers under the action of a drawing force. In addition, there are many studies on the flexural properties of the polymer in the pendant sense, reported in the literature "Effect of weaving on textile flap, binding and shear" (Belinda T. Orzada, Mary Ann Moore, Billie J. Collier, Jonathan Yan Chen, International Journal of cloning Science and Technology,2009 (21): 44-55) that the flexural properties of the polymer in the pendant sense were obtained by a KES-F shear tester and a pure bend tester.
Chinese patent CN 109142690A discloses a method for testing multi-directional stiffness of a fabric, which cuts the fabric to be tested into a round shape, and realizes the measurement of stiffness of the same fabric to be tested in all directions by adjusting the direction of the fabric to be tested, but the method can not measure the draping and bending resistance of a polymer. Chinese patent CN 107478534 a discloses a composite fabric stiffness tester, which flattens a composite fabric to be tested by a pressing block and drags the composite fabric manually to hang freely, and measures the hanging distance and the lap distance of the composite fabric, but the device needs to be operated manually to cause artificial influence on the physical properties of the polymer to be tested.
Disclosure of Invention
In view of the above, the present invention provides a device and a method for testing stiffness and bending resistance of a polymer under two modes of a fixed suspension height and a fixed suspension length, which can be used to quickly and accurately test the suspension characteristic, bending characteristic and small application range of the polymer in the prior art.
The technical scheme of the invention is that the polymer stiffness and suspension bending resistance testing device with the following structure is provided, and comprises a feeding component, a fixed suspension height testing component, a fixed suspension length testing component and a rack, wherein the feeding component, the fixed suspension height testing component and the fixed suspension length testing component are all arranged on the rack, the fixed suspension height testing component and the fixed suspension length testing component are oppositely arranged and are both positioned below the feeding component, and the fixed height testing component is arranged at the right output end of the fixed suspension length testing component;
the fixed suspension height testing assembly comprises a lifting mechanism and an infrared detector, the lifting mechanism is mounted on the rack and is positioned below the feeding assembly, and the infrared detector is arranged on a working platform on the lifting mechanism;
the fixed overhang length testing assembly comprises a platform supporting plate jacking mechanism and a testing probe mechanism, wherein the platform supporting plate jacking mechanism is arranged below the smooth feeding platform through a fixed supporting frame a; smooth pay-off platform is used for placing the polymer that awaits measuring, test probe mechanism set up in platform backup pad jack-up mechanism's below.
Optionally, the feeding assembly comprises a screw rod transmission mechanism and a pressing mechanism, and the pressing mechanism drives the pressing strip through pneumatic transmission of the cylinder a to press the polymer to be detected; the screw rod transmission mechanism drives the pressing mechanism to move through the screw rod sliding block b so as to realize the placement of the polymer to be tested.
As optional, the frame includes chassis, lower chassis and fixed bolster, it includes bottom plate frame a and last bottom plate frame b to go up the chassis, the bottom plate includes bottom plate frame a and bottom plate frame b down, it is fixed with the bottom plate frame through fixed bolster to go up the chassis.
Optionally, the screw rod transmission mechanism comprises a motor a, a coupler b, a guide rod, a screw rod b, a screw rod nut and a screw rod slider b, the screw rod b and the guide rod are horizontally arranged, the screw rod slider b is sleeved on the screw rod b and the guide rod, the screw rod slider b is in sliding connection with the guide rod, the screw rod nut is installed at two ends of the screw rod slider b, the motor a is arranged on the rack, the output end of the motor a is connected with one end of the screw rod b through the coupler b, and the pressing mechanism is installed on the screw rod slider b; the motor a drives the screw rod b to rotate, so that the pressing mechanism is driven to move, and the guide rod shares the bearing.
Optionally, the pressing mechanism is positioned above the polymer to be tested, the pressing mechanism comprises a cylinder a, a fixing frame b, a pressing strip, a connecting column and a cylinder connecting plate, the cylinder connecting plate is connected with the screw rod sliding block b through the connecting column, the cylinder a is installed on the fixing frame b, and the output end of the cylinder a is connected with the pressing strip; the cylinder a moves to drive the tightening strip to move up and down.
Optionally, the smooth feeding platform is arranged above the upper bottom plate frame b through a fixed support frame, and baffles are arranged on the front side and the rear side of the smooth feeding platform.
Optionally, the lifting mechanism comprises a motor b, a bearing a, a coupler a, a screw rod slider a, a movable groove, a transmission plate, a connecting piece and an upper working platform, the motor b is mounted on the lower bottom plate frame a, the output end of the motor b is connected with one end of the screw rod a through the coupler a, the bearing a and the movable groove are also mounted on the lower bottom plate frame a, the transmission plate is connected through the connecting piece, the movable end of the transmission plate is connected to the screw rod a through the screw rod slider a, and the upper working platform is mounted on the transmission plate; the motor b drives the screw rod a to move left and right through the coupler a, so that the movable end of the transmission plate is driven to move left and right in the movable groove, and the upper working platform is driven to move up and down; the infrared detector is connected to the upper plane of the upper working platform of the lifting mechanism through threads.
Optionally, the platform supporting plate jacking mechanism comprises an air cylinder b, a platform supporting plate, a hinge structure, a fixing frame a, a pin, a movable connecting rod and a connecting air cylinder rod, the air cylinder b is fixed below the smooth feeding platform, the platform supporting plate is fixed on the smooth feeding platform through the hinge structure, the fixing frame a is installed below the platform supporting plate, the fixing frame a is connected with the movable connecting rod through the pin and is fixed on the platform supporting plate, and the movable connecting rod is connected with the air cylinder b through the connecting air cylinder rod.
Optionally, the test probe mechanism comprises a telescopic motor, a motor base, an electric push rod, a fixing screw and a test probe, the telescopic motor is fixed on the upper plane of the lower plate frame b through the motor base, and the test probe is fixed at the output end of the telescopic motor through the fixing screw; the telescopic movement of the electric push rod on the telescopic motor drives the test probe to move.
Another technical solution of the present invention is to provide a method for testing stiffness and drape bending resistance of a polymer, which comprises the following steps of:
the method comprises the following steps of (1) flatly placing a polymer to be tested on a smooth feeding platform, wherein two opposite sides of the polymer to be tested are respectively and fixedly pressed by two pressing strips of a pressing mechanism, and a feeding assembly moves the polymer to be tested forward in a flat state through a screw rod transmission mechanism and sends the polymer to be tested into a testing platform;
the first stage is as follows: the fixed suspension height testing assembly raises the infrared detector from an initial state to a set position through screw transmission and connecting rod transmission, and detects the numerical value of the suspended length of the polymer to be tested which naturally hangs due to gravity and self stiffness through the infrared detector to obtain the stiffness characteristic of the polymer to be tested;
and a second stage: the fixed suspension height testing component and the feeding component reset, the polymer is placed on the feeding platform again and fixed through the pressing mechanism, the fixed suspension length testing component supports the platform supporting plate to be flush with the smooth feeding platform through pneumatic transmission and connecting rod transmission, the testing probe is moved to a set position through the pneumatic transmission and the connecting rod transmission, and the testing probe is rapidly retracted through the platform supporting plate and then naturally suspended pressure, sensing time and suspension state of the polymer to be tested are obtained, so that the bending resistance of the polymer to be tested is obtained;
and a third stage: and the fixed suspension length testing assembly and the feeding assembly reset.
Compared with the prior art, the invention has the following advantages by adopting the structure and the method: the feeding assembly can automatically feed the polymer sample to be tested to the test platform, and the polymer sample to be tested is not stretched, distorted, stacked and folded, and the test process result is not influenced; the test conversion of the polymer stiffness and the suspension bending resistance under two modes of fixed suspension height and fixed suspension length can be rapidly and conveniently carried out, and the multi-dimensional detection under different variables is realized; under a fixed suspension height test mode, the infrared detector is driven to lift through the lifting mechanism, so that different suspension fixed heights are set; under the fixed overhang length test mode, the polymer to be tested can be kept to a fixed length from the smooth feeding platform, and subsequent tests are not influenced; the change relation among the draping length, the stress and the time of the polymer in a natural draping state is obtained, the comprehensive test of the polymer stiffness and the draping bending resistance is realized, and the polymer stiffness and the draping bending resistance are evaluated. The invention can quickly and accurately test the stiffness and the suspension bending resistance of the polymer under two modes of fixed suspension height and fixed suspension length.
Drawings
FIG. 1 is a front view of a device for testing stiffness and drape bending resistance of a polymer of the present invention.
FIG. 2 is a left side view of the device for testing stiffness and drape bending resistance of the polymer of the present invention.
Fig. 3 is a schematic structural view of the platform support plate.
Fig. 4 is a schematic structural diagram of a test probe.
In the figure: the device comprises a bearing a1, a screw rod a2, a screw rod sliding block a3, a movable groove 4, a coupling a5, a connecting piece 6, a transmission plate 7, an upper working platform 8, an infrared detector 9, a platform supporting plate 10, a fixing screw 11, a test probe 12, a fixing frame a13, a pin 14, a hinge structure 15, a movable connecting rod 16, a connecting cylinder rod 17, a bearing b18, a screw rod b19, a guide rod 20, a cylinder connecting plate 21, a screw rod nut 22, a connecting column 23, a screw rod sliding block b24, a cylinder a25, a fixing frame b26, a coupling b27, a motor a28, a tightening strip 29, an upper bottom plate frame a30, a baffle 31, a smooth feeding platform 32, a cylinder b33, a fixing supporting frame 34, an upper bottom plate frame b35, a lower plate frame b36, a telescopic motor 37, a motor seat 38, an electric push rod 39, a motor b40, a lower plate frame a41 and a fixing bolt 42.
Detailed Description
The invention is further described with reference to the following figures and specific examples.
The invention is intended to cover alternatives, modifications, equivalents, and alternatives that may be included within the spirit and scope of the invention. In the following description of the preferred embodiments of the present invention, specific details are set forth in order to provide a thorough understanding of the present invention, and it will be apparent to those skilled in the art that the present invention may be practiced without these specific details. Moreover, the drawings of the present invention are not necessarily to scale, nor are they necessarily to scale, as may be shown and described herein.
As shown in fig. 1 and 2, the device for testing stiffness and bending resistance of a polymer in a suspension manner comprises a feeding assembly, a fixed suspension height testing assembly, a fixed suspension length testing assembly and a frame, wherein the frame is composed of an upper chassis, a lower chassis and fixed supporting frames 34, the upper chassis comprises an upper bottom plate frame a30 and an upper bottom plate frame b35, the lower chassis comprises a lower bottom plate frame a41 and a lower bottom plate frame b36, the upper bottom plate frame a30 is composed of five horizontally placed fixed supporting frames 34, the lower bottom plate frame a41 is composed of six horizontally placed fixed supporting frames 34, the upper bottom plate frame a30 and the lower bottom plate frame a41 are fixed by six vertically placed fixed supporting frames 34, the upper bottom plate frame b35 and the lower bottom plate frame b36 are respectively composed of four horizontally placed fixed supporting frames 34, the upper bottom plate frame b35 and the lower bottom plate frame b36 are fixed on the lower bottom plate a41 through the four vertically placed fixed supporting frames 34, the feeding assembly comprises a screw rod transmission mechanism and a lower pressing mechanism, the screw rod transmission mechanism consists of a motor a28, a coupling b27, a guide rod 20, a screw rod b19, a screw rod nut 22 and a screw rod slider b24, wherein the motor a28 is horizontally arranged on the left side of the upper plane of an upper bottom plate frame a30, the right side of a motor a28 is provided with the coupling b27 and is fixed on the upper plane of the upper bottom plate frame a30, the right side of a coupling b27 is provided with the guide rod 20 and the screw rod b19 which are horizontally arranged in parallel and is connected with a bearing b18 on the right side of the upper plane of the upper bottom plate frame a30, two sides of the screw rod slider b24 are provided with the screw rod nut 22 and are arranged on the screw rod b19, a pressing mechanism is arranged below the screw rod slider b24 and comprises an air cylinder a25, a fixing frame b26, a pressing strip 29, a connecting column 23 and an air cylinder connecting plate 21, the air cylinder connecting plate 21 is fixed on the screw rod slider b24 through the fixing frame by bolts, six air cylinders a25 is arranged on the front and back sides of the upper plane of the air cylinder connecting plate 21 through twelve air cylinder connecting plates 26 and is fixed through bolts, the output end of the air cylinder a25 is provided with two tight pressing strips 29, a smooth feeding platform 32 is arranged under the tight pressing strips 29, two side baffles 31 are arranged on the front side and the rear side of the upper plane of the smooth feeding platform 32, the fixed suspension height testing assembly comprises a lifting mechanism and an infrared detector 9, the lifting mechanism comprises a motor b40, a bearing a1, a coupling a5, a screw a2, a screw slider a3, a movable groove 4, a transmission plate 7, a connecting piece 6 and an upper working platform 8, the motor b40 is horizontally arranged at the middle position of the upper plane of the lower plate frame a41, the right side of the motor b40 is provided with a coupling a5, the bearing a1 is arranged at the right end of the upper plane of the lower plate frame a41, the screw a2 is arranged between the bearing a1 and the coupling a5, the movable grooves 4 are arranged on the front side and the rear side of the screw a2, the screw slider a3 is arranged on the screw a2 and arranged in the movable groove 4, the front side and rear side of the screw slider a3 are respectively provided with two transmission plates 7 on the same side, and the front side are rotatably connected through the connecting piece 6, the two transmission plates 7 on the right side are respectively connected with the movable groove in a rotating way through two connecting pieces 6, the two transmission plates 7 on the left side are arranged on a screw rod sliding block a3, the upper working platform 8 is connected with the four transmission plates 7 through bolts, an infrared detector 9 is arranged on the upper plane of the upper working platform 8, the fixed suspension length testing component comprises an air cylinder b33, a platform supporting plate 10, a hinge structure 15, a fixed frame a13, a pin 14, a movable connecting rod 16, a connecting air cylinder rod 17, a telescopic motor 37, a motor base 38, an electric push rod 39, a fixing screw 11 and a testing probe 12, the platform supporting plate 10 is connected with a smooth feeding platform 32 through the hinge structure 15, a fixed frame a13 is arranged below the platform supporting plate 10, the movable connecting rod 16 is connected with the fixed frame a13 through the pin 14, the left side of the movable connecting rod 16 is provided with the connecting air cylinder rod 17, the air cylinder b33 is arranged between the smooth feeding platform 32 and an upper bottom plate frame b35 and is connected with the connecting air cylinder rod 17, the telescopic motor 37 is arranged between the upper bottom plate frame b35 and the lower bottom plate frame b36 through a motor base 38 and is connected with the right electric push rod 39, and the test probe 12 is vertically arranged at the right end of the electric push rod 39 through a fixing screw 11.
As shown in fig. 3, the platform support plate 10 is connected with the smooth feeding platform 32 through a hinge structure 15, a fixing frame a13 is arranged below the platform support plate 10, the air cylinder b33 is arranged below the smooth feeding platform 32 through a fixing bolt 42, a connecting air cylinder rod 17 is arranged on the right side of the air cylinder b33, and the movable connecting rod 16 is arranged between the air cylinder connecting rod 17 and the fixing frame a13 through a pin 14.
As shown in fig. 1 and 4, the extension motor 37 is horizontally disposed on the lower plate frame b36 through the motor base 38, the electric push rod 39 is disposed on the right side of the extension motor 37, and the test probe 12 is disposed at the right end of the electric push rod 39 through the fixing screw 11.
It should be noted that the front and back opposite sides of the polymer to be tested are compressed by the tightening strip and the smooth feeding platform and then are fed into the testing platform, so that the polymer to be tested can be ensured not to be stretched, distorted, stacked and wrinkled and the result of the testing process is not influenced, and the stiffness and the suspension bending resistance can be tested.
A method for testing the stiffness and the drape bending resistance of a polymer is based on the device for testing the stiffness and the drape bending resistance of the polymer and comprises the following steps:
the method comprises the following steps of (1) flatly placing a polymer to be tested on a smooth feeding platform, wherein two opposite sides of the polymer to be tested are respectively and fixedly pressed by two pressing strips of a pressing mechanism, and a feeding assembly moves the polymer forwards in a flat state through a screw rod transmission mechanism and sends the polymer into a testing platform;
the first stage is as follows: the fixed suspension height testing assembly raises the infrared detector from an initial state to a set position through screw transmission and connecting rod transmission, and detects the numerical value of the suspended length of the polymer to be tested which naturally hangs due to gravity and self stiffness through the infrared detector to obtain the stiffness characteristic of the polymer to be tested;
and a second stage: the fixed suspension height testing component and the feeding component reset, the polymer is placed on the feeding platform again and fixed through the pressing mechanism, the fixed suspension length testing component supports the platform supporting plate to be flush with the smooth feeding platform through pneumatic transmission and connecting rod transmission, the testing probe is moved to a set position through the pneumatic transmission and the connecting rod transmission, and the testing probe is rapidly retracted through the platform supporting plate and then naturally suspended pressure, sensing time and suspension state of the polymer to be tested are obtained, so that the bending resistance of the polymer to be tested is obtained;
and a third stage: and the fixed suspension length testing assembly and the feeding assembly reset.
The specific test method comprises the following steps: before the test is started, the instrument is checked, then the power supply is switched on, the polymer sample to be tested is horizontally placed on the smooth feeding platform 32, the air cylinder a25 is started, the polymer sample is tightly pressed by the tight pressing strip 29, simultaneously starting a motor a28 and a motor b40, setting the time to be 3min, controlling a screw rod a2 to rotate at a certain speed by a motor b40 to drive a screw rod sliding block a3 to move, driving an upper working platform 8 and an infrared detector 9 to move up and down to a set testing height position through a transmission plate 7 by the movement of the screw rod sliding block a3, controlling a screw rod b19 by a motor a28 to drive a screw rod sliding block b24 to move at a certain speed, driving a polymer sample to be tested to enter the testing platform by a tight pressing strip 29, and collecting the time and the suspended length value of the polymer sample naturally suspended to the set height due to gravity and self stiffness by the infrared detector 9 to finish the testing of the polymer stiffness and the bending resistance under the fixed suspension height mode; resetting the feeding component and the lifting mechanism, putting the polymer sample to be tested on the smooth feeding platform 32 again, starting the air cylinder a25 to enable the tight pressing strip 29 to press the polymer sample, starting the air cylinder b33 and the telescopic motor 37, setting the time to be 3min, driving the movable connecting rod 16 to rotate by the air cylinder b33 through the connecting air cylinder rod 17, driving the fixed frame a13 to support the platform supporting plate 10 by the rotation of the movable connecting rod 16, driving the electric push rod 39 to move by the telescopic motor 37, driving the testing probe 12 to move to the set testing length position by the electric push rod 39, controlling the screw rod b19 to drive the screw rod slider b24 to move at a certain speed by the motor a28, driving the polymer sample to be tested to enter the testing platform by the tight pressing strip 29, then driving the connecting air cylinder rod 17 and the movable connecting rod 16 to retract the platform supporting plate 10 rapidly through the air cylinder b33, enabling the polymer sample to be tested to naturally droop and fall on the testing probe 12 below, the test probe can acquire stress, induction time and the like, tests on the stiffness and the suspension bending resistance of the polymer in a fixed suspension length mode are completed, the feeding component and the fixed suspension length test component are reset, multiple groups of parameters of the stiffness and the suspension bending resistance of the polymer sample can be obtained through multiple tests, and finally, data calculation, analysis and summary of test results are performed.
The testing principle of the device is as follows: the polymer of different materials has different self-stiffness, the suspension state is different when the polymer is suspended under the influence of gravity, the suspension state is represented by indexes such as length, stress, time and the like by controlling the variable method, the suspension state is digitalized to obtain the stiffness test value when the polymer of the same size and different materials is suspended naturally at a fixed suspension height, the suspension process is different when the polymer of different materials is suspended at a fixed suspension length, and the comprehensive test of the suspension bending resistance characteristic of the polymer under the fixed suspension length mode can be realized by collecting the suspension stress, the induction time and the like of the polymer.
The foregoing is merely illustrative of embodiments of the present invention and is not to be construed as limiting the claims. The present invention is not limited to the above embodiments, and the specific structure thereof is allowed to vary. In general, all changes which come within the scope of the invention as defined by the independent claims are intended to be embraced therein.
Claims (10)
1. The utility model provides a polymer stiffness and bending resistance testing arrangement that dangles which characterized in that: the device comprises a feeding assembly, a fixed suspension height testing assembly, a fixed suspension length testing assembly and a rack, wherein the feeding assembly, the fixed suspension height testing assembly and the fixed suspension length testing assembly are all installed on the rack, the fixed suspension height testing assembly and the fixed suspension length testing assembly are installed oppositely and are all positioned below the feeding assembly, and the fixed suspension height testing assembly is arranged at the right output end of the fixed suspension length testing assembly;
the fixed suspension height testing assembly comprises a lifting mechanism and an infrared detector (9), the lifting mechanism is mounted on the rack and is positioned below the feeding assembly, and the infrared detector (9) is arranged on a working platform on the lifting mechanism;
the fixed overhang length testing assembly comprises a platform supporting plate jacking mechanism and a testing probe mechanism, wherein the platform supporting plate jacking mechanism is arranged below the smooth feeding platform (32) through a fixed supporting frame (34); smooth pay-off platform (32) are used for placing the polymer that awaits measuring, test probe mechanism set up in the below of platform backup pad jack-up mechanism.
2. The polymer stiffness and drape bending resistance test device of claim 1, wherein: the feeding assembly comprises a screw rod transmission mechanism and a pressing mechanism, and the pressing mechanism drives a pressing strip (29) through pneumatic transmission of a cylinder a (25) to realize pressing of the polymer to be detected; the screw rod transmission mechanism drives the pressing mechanism to move through a screw rod sliding block b (24) so as to realize the placement of the polymer to be tested.
3. The polymer stiffness and drape bending resistance test device of claim 1, wherein: the frame includes chassis, lower chassis and fixed stay frame (34), it includes bottom plate frame a (30) and last bottom plate frame b (35) to go up the chassis, the bottom plate frame is including bottom plate frame a (41) and bottom plate frame b (36) down, it is fixed with the bottom plate frame through fixed stay frame (34) to go up the chassis.
4. The polymer stiffness and drape bending resistance test device of claim 2, wherein: the screw rod transmission mechanism comprises a motor a (28), a coupler b (27), a guide rod (20), a screw rod b (19), a screw rod nut (22) and a screw rod sliding block b (24), the screw rod b (19) and the guide rod (20) are horizontally arranged, the screw rod sliding block b (24) is sleeved on the screw rod b (19) and the guide rod (20), the screw rod sliding block b (24) is connected with the guide rod (20) in a sliding mode, the screw rod nut (22) is installed at two ends of the screw rod sliding block b (24), the motor a (28) is arranged on the rack, the output end of the motor a (28) is connected with one end of the screw rod b (19) through the coupler b (27), and the pressing mechanism is installed on the screw rod sliding block b (24); the motor a (28) drives the screw rod b (19) to rotate, so that the pressing mechanism is driven to move.
5. The polymer stiffness and drape bending resistance test device of claim 2 or 4, wherein: the pressing mechanism is positioned above a polymer to be tested and comprises an air cylinder a (25), a fixing frame b (26), a pressing strip (29), a connecting column (23) and an air cylinder connecting plate (21), the air cylinder connecting plate (21) is connected with a screw rod sliding block b (24) through the connecting column (23) and is fixed below the screw rod sliding block b (24) through the fixing frame b (26), the air cylinder a (25) is installed on the fixing frame b (26), and the output end of the air cylinder a is connected with the pressing strip (29); the air cylinder a (25) moves to drive the tightening strip (29) to move up and down.
6. The polymer stiffness and drape bending resistance test device of claim 1, wherein: smooth feeding platform (32) set up the top at last bottom plate frame b (35) through fixed stay frame (34), both sides are equipped with baffle (31) around smooth feeding platform (32).
7. The polymer stiffness and drape bending resistance test device of claim 1, wherein: the lifting mechanism comprises a motor b (40), a bearing a (1), a coupler a (5), a screw rod a (2), a screw rod sliding block a (3), a movable groove (4), a transmission plate (7), a connecting piece (6) and an upper working platform (8), wherein the motor b (40) is installed on a lower bottom plate frame a (41), the output end of the motor b is connected with one end of the screw rod a (2) through the coupler a (5), the bearing a (1) and the movable groove (4) are also installed on the lower bottom plate frame a (41), the transmission plate (7) is connected through the connecting piece (6), the movable end of the transmission plate is connected to the screw rod a (2) through the screw rod sliding block a (3), and the upper working platform (8) is installed on the transmission plate (7); the motor b (40) drives the screw rod a (2) to move left and right through the coupler a (5), so that the movable end of the transmission plate (7) is driven to move left and right in the movable groove (4), and the upper working platform (8) is driven to move up and down; the infrared detector (9) is connected to the upper plane of the upper working platform (8) of the lifting mechanism through threads.
8. The polymer stiffness and drape bending resistance test device of claim 1 or 4, wherein: the jacking mechanism of the platform supporting plate comprises an air cylinder b (33), the platform supporting plate (10), a hinge structure (15), a fixed frame a (13), a pin (14), a movable connecting rod (16) and a connecting air cylinder rod (17), wherein the air cylinder b (33) is fixed below the smooth feeding platform (32), the platform supporting plate (10) is fixed on the smooth feeding platform (32) through the hinge structure (15), the fixed frame a (13) is installed below the platform supporting plate (10), the fixed frame a (13) is connected with the movable connecting rod (16) through the pin (14) and fixed on the platform supporting plate (10), and the movable connecting rod (16) is connected with the air cylinder b (33) through the connecting air cylinder rod (17).
9. The polymer stiffness and drape bending resistance test device of claim 3, wherein: the test probe mechanism comprises a telescopic motor (37), a motor base (38), an electric push rod (39), a fixing screw (11) and a test probe (12), wherein the telescopic motor (37) is fixed on the upper plane of the lower base plate frame b (36) through the motor base (38), and the test probe (12) is fixed at the output end of the telescopic motor (37) through the fixing screw (11); the telescopic movement of an electric push rod (39) on the telescopic motor (37) drives the test probe (12) to move.
10. A method for testing the stiffness and the drape bending resistance of a polymer, which is based on the device for testing the stiffness and the drape bending resistance of a polymer in claim 1, and is characterized in that: the method comprises the following steps:
the method comprises the following steps of (1) flatly placing a polymer to be tested on a smooth feeding platform, wherein two opposite sides of the polymer to be tested are respectively and fixedly pressed by two pressing strips of a pressing mechanism, and a feeding assembly moves the polymer to be tested forward in a flat state through a screw rod transmission mechanism and sends the polymer to be tested into a testing platform;
the first stage is as follows: the fixed suspension height testing assembly raises the infrared detector from an initial state to a set position through screw transmission and connecting rod transmission, and detects the numerical value of the suspended length of the polymer to be tested which naturally hangs due to gravity and self stiffness through the infrared detector to obtain the stiffness characteristic of the polymer to be tested;
and a second stage: the fixed suspension height testing component and the feeding component reset, the polymer is placed on the feeding platform again and fixed through the pressing mechanism, the fixed suspension length testing component supports the platform supporting plate to be flush with the smooth feeding platform through pneumatic transmission and connecting rod transmission, the testing probe is moved to a set position through the pneumatic transmission and the connecting rod transmission, and the testing probe is rapidly retracted through the platform supporting plate and then naturally suspended pressure, sensing time and suspension state of the polymer to be tested are obtained, so that the bending resistance of the polymer to be tested is obtained;
and a third stage: and the fixed suspension length testing assembly and the feeding assembly reset.
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| CN111624103B (en) * | 2020-06-08 | 2023-06-20 | 中国计量大学 | Device and method for testing arching characteristics of polymer sheet |
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