CN115372177A - Anti-drop performance testing method and device - Google Patents
Anti-drop performance testing method and device Download PDFInfo
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- CN115372177A CN115372177A CN202211005036.XA CN202211005036A CN115372177A CN 115372177 A CN115372177 A CN 115372177A CN 202211005036 A CN202211005036 A CN 202211005036A CN 115372177 A CN115372177 A CN 115372177A
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- 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
- G01N3/30—Investigating strength properties of solid materials by application of mechanical stress by applying a single impulsive force, e.g. by falling weight
- G01N3/303—Investigating strength properties of solid materials by application of mechanical stress by applying a single impulsive force, e.g. by falling weight generated only by free-falling weight
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- G—PHYSICS
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- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M7/00—Vibration-testing of structures; Shock-testing of structures
- G01M7/08—Shock-testing
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
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Abstract
The invention relates to a method and a device for testing anti-falling performance; the method for testing the anti-falling performance comprises the following steps: the method comprises the following steps of obtaining a support piece, obtaining a detection sample, placing the detection sample on the support piece, placing a lower pressure piece on the detection sample, and placing an impact piece above the lower pressure piece, so that the impact piece performs free-falling body movement and impacts the lower pressure piece; the application discloses anti drop capability test method, through place down the piece on detecting the sample, and make striking piece striking down the piece, make striking piece no matter strike which position of piece under, down the piece all can evenly exert the impact that receives on detecting the sample, avoid influencing the accuracy nature of data because of the difference of the position of striking, effectively avoid detecting in the testing process that the sample takes place upset skew and piece and splash scheduling problem, and because final impact can be used on the contact surface of detecting sample and support piece, consequently this testing method also can be close to traditional testing method more.
Description
Technical Field
The invention relates to the technical field of performance testing, in particular to a method and a device for testing anti-drop performance.
Background
In flat Panel Display devices such as PDP (Plasma Display Panel), LCD (Liquid Crystal Display), mobile phone, personal Digital Assistant (PDA), desktop computer, notebook computer, and tablet computer with touch sensor function, a glass cover plate is disposed on the front surface of the Display for protecting the Display and improving the appearance.
The glass cover plate of the display can be damaged due to collision or falling in the process of transportation and use. When the existing glass cover plate is tested for anti-drop performance and impact resistance, a complete machine drop test method is mostly used, a test piece is assembled on a machine die or a balancing weight, then the machine die or the balancing weight provided with the test piece is loosened at a high position, the machine die or the balancing weight is made to freely fall and impact on a test bench, and then the damage condition of the test piece on the machine die or the balancing weight is observed. Or testing by using a falling ball test method, striking the test piece by using a steel ball which moves in a free falling body, and judging the quality of the test piece by observing the damage degree of the test piece.
When the heights of the plurality of test pieces which are crushed by the impact are consistent, the accuracy of the detection result can be ensured to the maximum extent. However, when the whole machine drop test method is used, the die or the counterweight block with the test piece is easy to turn over or shift during the dropping process, so that the corner part of the test piece is broken due to the fact that the test piece is firstly contacted with the test bench, the test data has large volatility, and the real drop resistance of the test piece cannot be well represented. When the falling ball test method is used, after a test piece is broken, the broken part of the test piece is easy to splash everywhere, so that subsequent cleaning is not convenient, and the splashed fragments are easy to scratch surrounding personnel. In addition, because the drop ball test method belongs to a point-breaking type, the accuracy and the qualification of data can be influenced by the different impact positions of the steel ball on different test pieces.
In addition, in order to reduce the influence of the processing quality of the test piece on the test result, the processing flow is very complex during laboratory preparation: needs to be processed by the processes of melting a large glass brick (about 75mm multiplied by 160 mm), annealing, linear cutting, grinding and polishing, CNC, edge polishing, scanning and the like. The size of the processed test piece is large, the processing is complex, the yield is low, and the consumed time is long. And because the processing capacities of all units are inconsistent, the edge quality of the test piece is not uniform, so that the test result is unstable, the test result has high volatility, and the data has no comparability.
Disclosure of Invention
Therefore, it is necessary to provide a method and an apparatus for testing drop resistance, aiming at the problems that the impact positions of the test pieces cannot be guaranteed to be consistent, so that the test data is unstable, the processing consumes time and labor, and the processing quality affects the test result.
A drop resistance testing method comprises the following steps:
obtaining a support having a rough first surface;
obtaining a detection sample, placing the detection sample on the support, and attaching the detection sample to the first surface of the support;
obtaining a pressing piece, and placing the pressing piece on the detection sample to enable the lower surface of the pressing piece to be attached to the upper surface of the detection sample;
obtaining an impact piece, and placing the impact piece above the lower pressure piece to enable the impact piece to do free-fall motion and impact the lower pressure piece;
and moving the lower pressing piece to enable the lower pressing piece to be away from the detection sample, and acquiring a state result of the detection sample so as to evaluate the anti-falling performance of the detection sample.
According to the anti-falling performance testing method, the lower pressing piece is placed on the detection sample, and the impact piece impacts the lower pressing piece, so that the impact force applied to the lower pressing piece is uniformly applied to the detection sample no matter where the impact piece impacts the lower pressing piece, the accuracy and the qualification of data are avoided being influenced due to different impacting positions, the problems of turnover deviation, fragment splashing and the like of the detection sample in the testing process can be effectively avoided, and the final impact force acts on the contact surface of the detection sample and the supporting piece, so that the testing method is closer to the traditional testing method; in addition, through the bottom surface that makes the testing sample and the laminating of the coarse first surface of support piece, can strengthen the steadiness of testing sample on support piece, avoid it to appear the skew phenomenon in the test, further guarantee test effect, in addition, because the sample need not to set up on machine mould or balancing weight, consequently the optional small-size that is applicable to laboratory sample preparation of testing sample size, and the sample can remove the processing to the edge from, accelerate the test progress, effectively avoid the test result to receive the influence of edge processingquality.
In one embodiment, after obtaining the status result of the detection sample, the method further comprises:
when the state of the detection sample is a damaged state, observing and recording the damaged condition of the detection sample;
when the state of the detection sample is in a perfect state, moving the pressing piece again to enable the lower surface of the pressing piece to be attached to the upper surface of the detection sample;
moving the impact piece to be positioned above the lower press piece, wherein the distance between the impact piece and the lower press piece is larger than the distance between the impact piece and the lower press piece during the last test;
driving the impacting member to perform free-fall movement and impact the pressing member;
and moving the lower pressing piece to be away from the detection sample, and acquiring a state result of the detection sample so as to evaluate the anti-falling performance of the detection sample.
In the above examples, a plurality of tests were conducted to comprehensively evaluate the drop resistance of the test specimen.
In one embodiment, after placing the hold-down on the test sample, the method further comprises:
and moving the downward pressing piece until the perpendicular bisector of the downward pressing piece coincides with the perpendicular bisector of the detection sample.
In the above embodiment, by making the perpendicular bisector of the push-down member coincide with the perpendicular bisector of the test specimen, the uniform effect of the impact force from the push-down member to the test specimen is further ensured.
In one embodiment, the step of obtaining the test sample is:
obtaining a glass cover plate, and cutting a detection sample with a set size on the glass cover plate.
In the embodiment, the detection sample is directly cut from the glass cover plate, so that the edge of the detection sample is not processed, the influence on the stability of the test result due to the difference of the edge processing quality is avoided, the fluctuation of the test result is reduced, the preparation difficulty of the detection sample can be reduced because the detection sample does not need to process the edge, and the preparation period of the detection sample is shortened.
In one embodiment, the area of the lower surface of the hold-down is smaller than the area of the upper surface of the test sample.
In the above embodiment, the edge of the test sample can not contact with the pressing member, and for the test sample with unprocessed edge, the arrangement can effectively avoid the situation that the pressing member impacts the edge of the test sample to cause the edge to break.
In one embodiment, the hold-down has flat and smooth upper and lower surfaces.
In the above embodiment, the smooth lower surface is convenient for make pushing down piece and detection sample laminating, and the smooth upper surface is convenient for striking piece and only gives pushing down piece vertical decurrent impact force, and also makes striking piece be difficult for squinting when striking pushing down the piece.
In one embodiment, the thickness of the hold-down is greater than the thickness of the test sample.
In the above embodiment, since the thinner the lower press member is, the worse the uniform transmission effect of the impact force is, by making the lower press member have a thickness larger than the test specimen, the uniform transmission effect of the lower press member on the impact force is ensured.
In one embodiment, the weight of the hold-down is greater than the weight of the test sample.
In the above embodiment, by making the pressing member have a weight larger than that of the test sample, the stability of the pressing member when pressing down the test sample is ensured.
In one embodiment, the lower member and the impact member are both made of hard rigid materials.
In the embodiment, the hard rigid material is selected, so that the lower pressing piece and the impact piece have good service life and impact resistance.
The utility model provides an anti drop capability test device, includes testing platform, support piece, pushes down and strikes the piece, support piece push down with strike the piece and all place testing platform is last, support piece has coarse first surface, support piece is used for supporting the testing sample, it is used for pushing down the testing sample to push down the piece, strike the piece is used for the striking push down, work as strike the piece is in when the top of pushing down is the free fall motion and strikes and pushes down the piece, the impact that pushes down will receive is evenly transmitted for the testing sample.
According to the anti-falling performance testing device, the lower pressing piece is placed on the detection sample, and the impact piece impacts the lower pressing piece, so that the impact force applied by the lower pressing piece to the detection sample is uniformly applied to the detection sample no matter where the impact piece impacts the lower pressing piece, the accuracy and the qualification of data are avoided being influenced due to different impacting positions, the problems of turnover deviation, fragment splashing and the like of the detection sample in the testing process can be effectively avoided, and the final impact force acts on the contact surface of the detection sample and the supporting piece, so that the testing method is closer to the traditional testing method; in addition, through making the bottom surface of detecting the sample and the first surface laminating that support piece is coarse, can strengthen the steadiness of detecting the sample on support piece, avoid it to appear the skew phenomenon in the test, further guarantee test effect.
Drawings
FIG. 1 is a schematic diagram illustrating the operation of a drop resistance test method according to some embodiments of the present application;
FIG. 2 is a graph showing the results of a test performed without a hold-down on the test specimen;
FIG. 3 is a graph showing the results of the test with the hold-down on the test specimen.
Reference numerals:
1. a support member;
2. detecting a sample;
3. a push-down member;
4. a striker.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, as those skilled in the art will recognize without departing from the spirit and scope of the present invention.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.
In the present invention, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the second feature or the first and second features may be indirectly contacting each other through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.
At the present stage, when a sample for the complete machine drop test is prepared in a laboratory, a sample with a large volume (the size of a mobile phone cover plate, 175mm x 95mm) is usually required to be melted, and the sample is required to be subjected to processes such as melting, annealing, wire cutting, grinding and polishing, cutting, CNC (computer numerical control), edge polishing, sweeping and the like. The sample has the characteristics of large size, complex processing and the like, and the testing effect is influenced by the edge processing quality, so that the testing result is unstable after the edge of the sample is processed, and the fluctuation of the testing result is large. In addition, in the traditional whole machine drop test process, when a machine die or a balancing weight carrying a sample falls down, some overturning phenomena inevitably occur, so that the corner/edge part of the sample is broken due to the fact that the corner/edge part of the sample contacts a test surface firstly when part of the sample is tested, and the test result is often not representative due to the interference factors.
In order to solve the problems, the application provides a drop resistance testing method which can simulate a complete machine drop test. The test comprises the following steps: the sandpaper was laid flat on a marble plate with the matte side facing up, the sample was placed on the sandpaper, and a square/round hard rigid material having a certain thickness was placed on the sample. And (3) knocking the square/round hard rigid materials on the sample by the steel ball with a certain weight from different heights, so that the impact force provided by the steel ball is uniformly applied to the contact surface of the gauze paper and the sample through the square/round hard rigid materials. Since the sample need not be placed on a die or weight, the test sample size can be selected to be 50 x 50mm2 suitable for laboratory sample preparation. And the sample can be removed from the processing (CNC/polishing) to the edge, accelerate the test progress, effectively avoid the test result to receive the influence of edge processingquality. Meanwhile, the method can effectively avoid instability caused by that the corner/edge part firstly contacts with sand paper due to the fact that the machine die/balancing weight overturns in the falling process during the whole machine falling test, and improve data reliability.
Example 1: referring to fig. 1, an embodiment of the present invention provides a method for testing drop resistance, including the following steps:
a support 1 is obtained, the support 1 having a rough first surface. In this embodiment, the supporting member 1 is made of glass sand paper, and the sand surface of the glass sand paper is the first surface. The glass sandpaper is placed with its first surface facing upward when in use.
Taking a detection sample 2, placing the detection sample 2 on a support 1, and attaching the detection sample 2 to a first surface of the support 1. In the present embodiment, the detection sample 2 is a glass cover plate. The glass cover plate is placed on the glass abrasive paper, and the lower surface of the glass cover plate is completely attached to the upper surface of the glass abrasive paper. In addition, in the present embodiment, in the test, 80-mesh sand paper is selected as the glass sand paper.
And acquiring a lower pressing piece 3, and placing the lower pressing piece 3 on the detection sample 2 to ensure that the lower surface of the lower pressing piece 3 is attached to the upper surface of the detection sample 2. In this embodiment, the lower press member 3 is made of a metal plate or a metal block. The metal plate or the metal block is placed on the glass cover plate, and the lower surface of the metal plate or the metal block is completely attached to the upper surface of the glass cover plate.
The striking member 4 is obtained, and the striking member 4 is placed above the lower pressing member 3, so that the striking member 4 makes a free-fall motion and strikes the lower pressing member 3. In the present embodiment, the striking member 4 is a metal ball. In specific operation, the minimum distance between the impact member 4 and the lower pressure member 3 is 0.4m, and the maximum distance between the impact member 4 and the lower pressure member 3 is an integral multiple of 0.1m. That is, the distance from the bottom of the striker 4 to the top of the lower holder 3 in the first test was 0.4m, and if the test sample 2 was not broken, the distance from the bottom of the striker 4 to the top of the lower holder 3 in the next test was increased by 0.1m until the test sample 2 was broken, and the height of the break was recorded.
And moving the lower pressing piece 3 to enable the lower pressing piece 3 to be away from the detection sample 2, and acquiring a state result of the detection sample 2 to evaluate the anti-falling performance of the detection sample 2.
According to the anti-falling performance testing method, the pressing piece 3 is placed on the detection sample 2, the impact piece 4 impacts the pressing piece 3, the impact piece 4 is enabled to be uniformly applied to the detection sample 2 no matter where the impact piece impacts the pressing piece 3, the pressing piece 3 can enable the received impact force to be uniformly applied to the detection sample 2, the accuracy and the qualification of data are prevented from being influenced due to different impacting positions, and the problems that the detection sample 2 is overturned, shifted, broken pieces are splashed and the like in the testing process can be effectively avoided. Specific effects can be seen in fig. 2 and 3. Wherein, fig. 2 is a test result diagram when the lower pressing member 3 is not provided on the test sample 2, the impact member 4 directly impacts on the test sample 2, and the broken part of the test sample 2 is in a dispersed state. Fig. 3 is a graph showing the test results of the test specimen 2 with the lower pressing member 3 thereon, and the impact member 4 is impacted against the lower pressing member 3, and the broken portion of the test specimen 2 is concentrated.
In addition, the test method is closer to the conventional test method because the final impact force is applied to the contact surface of the test sample 2 and the support 1. The traditional test method is a complete machine drop test method, a test piece is assembled on a machine die or a balancing weight, then the machine die or the balancing weight provided with the test piece is loosened at a high position, the test piece makes free-falling body movement and impacts on a test bench, and the stress surface of the test piece is the lower surface of the test piece, which is in contact with the test bench; the impact member 4 of the present application causes the support member 1 to impact the test sample 2 at the front side and to break the test sample 2 when it impacts the lower press member 3. That is, the impact force generated by the striking member 4 can be uniformly applied to the lower surface of the test sample 2 contacting the support member 1 by the lower pressing member 3, and thus the method used in the present application is closer to the conventional test method.
In addition, the bottom surface of the detection sample 2 is attached to the rough first surface of the support member 1, so that the stability of the detection sample 2 on the support member 1 can be enhanced, the phenomenon of deviation in the test process can be avoided, and the test effect can be further ensured; compared with a flat and smooth surface, the rough surface is more fit with the condition of the daily ground, so that the test effect is better.
In one embodiment, after obtaining the status result of the detection sample 2, the method further includes:
when the state of the test sample 2 is a broken state, the broken state of the test sample 2 is observed and recorded. In this embodiment, when the state of the test specimen 2 is a broken state, the position of the breakage and the degree of breakage of the test specimen can be observed, and a photographing record is performed using a camera or the like, while the distance between the striker 4 and the lower press 3 at the time of the next test is marked.
When the state of the detection sample 2 is intact, the lower pressing member 3 is moved again, so that the lower surface of the lower pressing member 3 is attached to the upper surface of the detection sample 2. In this embodiment, the sound state is the state that is consistent with the initial state and has no damage.
The striker 4 is moved to be located above the lower press member 3, and the distance between the striker 4 and the lower press member 3 is made larger than the distance between the striker 4 and the lower press member 3 at the time of the previous test. In this embodiment, the initial distance between the striking member 4 and the pressing member 3 is 0.4m, and the distance between the striking member 4 and the pressing member 3 is increased by 0.1m for each additional test.
The striking member 4 is driven to make a free-fall movement and strike the lower pressing member 3. In this embodiment, can use and snatch the mechanism and snatch striking piece 4, replace artifical snatch operation, make the test accuracy higher.
The lower press 3 is moved away from the test sample 2, and the result of the state of the test sample 2 is obtained to evaluate the drop resistance of the test sample 2.
In addition, in the present embodiment, when the state of the test sample 2 is sound, the same test can be performed again, and the accuracy of the test can be improved by increasing the number of tests. That is, when it is determined that the state of the test sample 2 is intact, the test sample 2 may be removed from the support 1, a new test sample 2 is placed on the support 1, the new test sample 2 is attached to the first surface of the support 1, and then the original test procedure is repeated, that is, the lower pressing member 3 is placed on the new test sample 2, the lower surface of the lower pressing member 3 is attached to the upper surface of the new test sample 2, the striking member 4 is placed above the lower pressing member 3, the striking member 4 is freely moved to strike the lower pressing member 3, the lower pressing member 3 is separated from the new test sample 2, and the state result of the new test sample 2 is obtained to see whether the state result is consistent with the test result of the previous test sample 2.
The anti-falling performance test method can be used for comprehensively evaluating the anti-falling performance of the detection sample 2 through multiple tests.
In one embodiment, after the pressing member 3 is placed on the test sample 2, the method further includes:
the lower press 3 is moved until the perpendicular bisector of the lower press 3 coincides with the perpendicular bisector of the test sample 2. In this embodiment, the shapes of the lower pressing member 3 and the test sample 2 are rectangular.
According to the anti-drop performance testing method, the perpendicular bisector of the lower pressing piece 3 is overlapped with the perpendicular bisector of the detection sample 2, and the uniform effect of the impact force from the lower pressing piece 3 on the detection sample 2 is further ensured.
In one embodiment, the step of obtaining the test sample 2 is:
a glass cover plate is obtained, and a test sample 2 having a set size is cut out from the glass cover plate. In this embodiment, the size of the detection sample 2 only needs 50mm, and does not need to process the edge, and compared with the conventional test method, the preparation difficulty of the detection sample 2 can be effectively reduced, the preparation period of the detection sample 2 is shortened, and the influence of the processing quality on the performance test result is avoided. The traditional test method is a complete machine drop test method, and a test sample needs to be assembled on a machine die or a balancing weight, so that the test piece is matched with the machine die or the balancing weight, most of test pieces have the size consistent with the size of a mobile phone cover plate, namely the size of the test sample is 175mm x 95mm, and the test sample needs to be subjected to processes such as melting, annealing, linear cutting, grinding and polishing, cutting, CNC (computer numerical control) edge polishing, scanning and the like, so that the size of the test sample is large, the processing is complex, and the influence on the test result is large due to different quality of edge processing.
According to the method for testing the anti-falling performance, the detection sample 2 is directly cut from the glass cover plate, so that the edge of the detection sample 2 is not processed, the influence on the stability of a test result due to the difference of the edge processing quality is avoided, the fluctuation of the test result is reduced, the preparation difficulty of the detection sample 2 can be reduced, and the preparation period of the detection sample 2 is shortened because the detection sample 2 does not need to be processed on the edge.
In one embodiment, the area of the lower surface of the hold-down 3 is smaller than the area of the upper surface of the test specimen 2. In the present embodiment, the area of the orthographic projection of the lower press piece 3 on the detection sample 2 is smaller than the area of the upper surface of the detection sample 2. In addition, the area of the lower surface of the detection sample 2 is smaller than or equal to the area of the upper surface of the support 1. That is, the area of the orthographic projection of the test sample 2 on the support 1 is less than or equal to the area of the upper surface of the support 1. The supporting effect of the supporting piece 1 on the detection sample 2 is ensured.
According to the anti-falling performance testing method, the edge of the detection sample 2 can not be contacted with the lower pressing piece 3, and the situation that the lower pressing piece 3 impacts the edge of the detection sample 2 to cause the breakage of the detection sample 2 with unprocessed edge can be effectively avoided.
In one embodiment, hold-down member 3 has flat and smooth upper and lower surfaces. In this embodiment, the pressing member 3 has a rectangular structure, and when the pressing member 3 is located on the detection sample 2, the lower surface of the pressing member 3 completely adheres to the upper surface of the detection sample 2.
According to the drop resistance testing method, the smooth lower surface is convenient for the lower pressing piece 3 to be attached to the detection sample 2, the smooth upper surface is convenient for the striking piece 4 to only give the vertical downward striking force to the lower pressing piece 3, and the striking piece 4 is not easy to deviate when striking the lower pressing piece 3.
In one embodiment, the thickness of the hold-down 3 is greater than the thickness of the test specimen 2. In the present embodiment, the thickness of the lower pressure member 3 becomes thicker as the mass of the striking member 4 increases, and the lower pressure member 3 is prevented from being deformed by the impact of the striking member 4, thereby causing the spot-like breakage of the test sample 2. Wherein, when the mass of the impact piece 4 is 32-64g, the thickness of the lower pressing piece 3 is more than 15mm.
In the above method for testing the falling resistance, since the thinner the lower member 3 is, the worse the uniform transmission effect of the impact force is, the uniform transmission effect of the lower member 3 to the impact force is ensured by making the lower member 3 have a thickness larger than that of the test sample 2.
In one embodiment, the weight of the pressing member 3 is larger than the weight of the test sample 2. By making the hold-down member 3 have a weight larger than the detection sample 2, the stability when the hold-down member 3 presses down the detection sample 2 is ensured.
In one embodiment, the lower member 3 and the striker 4 are both made of a hard rigid material. In this embodiment, the lower pressing member 3 is made of a steel plate or a steel block, and the striking member 4 is made of a steel ball.
According to the method for testing the anti-falling performance, the lower pressing piece 3 and the impact piece 4 are made of hard rigid materials, so that the service life is long, and the impact resistance is good.
The utility model provides an anti drop capability test device, including testing platform, support piece 1, holding down 3 and striking 4 are all placed on testing platform, support piece 1 has coarse first surface, support piece 1 is used for supporting testing sample 2, holding down 3 is used for pushing down testing sample 2, striking 4 is used for striking holding down 3, when striking 4 is the free fall motion and strikes holding down 3 in the top of holding down 3, the impact that holding down 3 will receive evenly transmits for testing sample 2.
In this embodiment, the supporting member 1 is made of glass sand paper, the first surface of which is the frosted surface of the glass sand paper, and the glass sand paper is 80-mesh sand paper. The detection sample 2 is a glass cover plate, and when the glass cover plate is placed on the glass abrasive paper, the lower surface of the glass cover plate is completely attached to the upper surface of the glass abrasive paper. And the area of the lower surface of the detection sample 2 is smaller than or equal to the area of the upper surface of the support 1. The supporting effect of the supporting piece 1 on the detection sample 2 is ensured. Metal sheet or metal block are selected for use to holding down piece 3, and when holding down piece 3 was placed on testing sample 2, the lower surface of holding down piece 3 laminated with testing sample 2's upper surface completely. The area of the lower surface of the lower press 3 is smaller than the area of the upper surface of the detection sample 2. The edge of the detection sample 2 is not contacted with the lower pressing piece 3, and the arrangement can effectively avoid the situation that the lower pressing piece 3 impacts the edge of the detection sample 2 to cause the breakage of the detection sample 2 with the untreated edge. The impact piece 4 is a metal ball, and the thickness of the lower pressure piece 3 becomes thicker along with the increase of the mass of the impact piece 4, so that the lower pressure piece 3 is prevented from deforming due to the impact of the impact piece 4, and the punctiform rupture of the detection sample 2 is avoided. Wherein, when the mass of the striking piece 4 is 32-64g, the thickness of the lower pressing piece 3 is more than 15mm.
According to the anti-falling performance testing device, the lower pressing piece 3 is placed on the detection sample 2, and the impact piece 4 impacts the lower pressing piece 3, so that the impact force applied to the lower pressing piece 3 is uniformly applied to the detection sample 2 no matter where the impact piece 4 impacts the lower pressing piece 3, the data accuracy and the data accuracy are prevented from being influenced due to different impacting positions, the problems of overturning deflection, fragment splashing and the like of the detection sample 2 in the testing process can be effectively avoided, and the final impact force acts on the contact surface of the detection sample 2 and the supporting piece 1, so that the testing method is closer to the traditional testing method; in addition, through making the bottom surface of detecting sample 2 and the coarse first surface laminating of support piece 1, can strengthen the steadiness of detecting sample 2 on support piece 1, avoid it to appear the skew phenomenon in the test, further guarantee test effect.
Example 2:
the anti-falling performance test method is used for testing a detection sample, the detection sample is glass, 50mm x 50mm is selected in a unified mode, and test results are shown in table 1.
Table 1 results of drop resistance test
As can be seen from test data 1 and test data 2, the position of the sandpaper (support) does not affect the test result of the glass (test sample). In addition, it is clear from the test data 3 that the arrangement of the rigid block (hold-down) does not affect the test result of the glass (test sample).
As can be seen from the test data 3 to 10, the thickness and area of the steel block (the lower press) have an influence on the test result of the glass (the test sample).
From the test data 9 to the test data 15, it can be seen that the area of the steel block (the lower member) and the weight of the steel ball (the striking member) have an influence on the test result of the glass (the test sample).
It can be seen from the test data 11 and the test data 16 that, when the area of the steel block (the lower pressing member) becomes large, the glass (the detection sample) is broken at the lowest point (0.4 m), and it can be further proved that the edge quality of the glass (the detection sample) is poor because the edge of the glass (the detection sample) is not subjected to CNC and polishing, and the glass (the detection sample) is easily broken because the steel block (the lower pressing member) contacts the edge of the glass (the detection sample) during the test.
As can be seen from test data 15 and test data 18, and test data 11 and test data 19, when the contact area of the steel block (down-press) with respect to the glass (test sample) is smaller than the contact area of the glass (test sample) with respect to the steel block (down-press), whether the edge of the glass (test sample) is processed (CNC, polished) or not does not greatly affect the test result. That is, the test result of the untreated edge of the glass (test sample) is substantially the same as the test result of the edge of the glass (test sample) after the treatment of the CNC, the scanning, the edge polishing and the like. Therefore, the testing method can effectively avoid the inconsistent edge quality of the glass (detection sample) caused by inconsistent processing capability, fluctuation of processing equipment and other reasons, and further influences the testing result.
All possible combinations of the technical features in the above embodiments may not be described for the sake of brevity, but should be considered as being within the scope of the present disclosure as long as there is no contradiction between the combinations of the technical features.
The above examples only show some embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent should be subject to the appended claims.
Claims (10)
1. A method for testing anti-drop performance is characterized by comprising the following steps:
obtaining a support (1), said support (1) having a rough first surface;
obtaining a detection sample (2), placing the detection sample (2) on the support (1), and enabling the detection sample (2) to be attached to the first surface of the support (1);
obtaining a lower pressing piece (3), and placing the lower pressing piece (3) on the detection sample (2) to enable the lower surface of the lower pressing piece (3) to be attached to the upper surface of the detection sample (2);
obtaining an impact piece (4), and placing the impact piece (4) above the lower pressure piece (3) to enable the impact piece (4) to make free-fall movement and impact the lower pressure piece (3);
and moving the lower pressing piece (3), enabling the lower pressing piece (3) to be away from the detection sample (2), and obtaining the state result of the detection sample (2) so as to evaluate the anti-falling performance of the detection sample (2).
2. The drop resistance testing method according to claim 1, further comprising, after obtaining the result of the state of the test specimen (2):
when the state of the detection sample (2) is a damaged state, observing and recording the damaged state of the detection sample (2);
when the state of the detection sample (2) is in a good state, the lower pressing piece (3) is moved again, so that the lower surface of the lower pressing piece (3) is attached to the upper surface of the detection sample (2);
moving the impact piece (4) to be positioned above the lower press piece (3), wherein the distance between the impact piece (4) and the lower press piece (3) is larger than the distance between the impact piece (4) and the lower press piece (3) in the last test;
the impact piece (4) is driven to freely fall and impact the lower pressing piece (3);
and moving the lower pressing piece (3) to be away from the detection sample (2), and acquiring a state result of the detection sample (2) to evaluate the anti-falling performance of the detection sample (2).
3. The drop resistance testing method according to claim 1, further comprising, after placing the hold-down member (3) on the test specimen (2):
and moving the lower pressing piece (3) until the perpendicular bisector of the lower pressing piece (3) coincides with the perpendicular bisector of the detection sample (2).
4. The drop resistance test method according to claim 1, wherein the step of obtaining the test sample (2) is:
a glass cover plate is obtained, on which a test sample (2) of a set size is cut.
5. The drop resistance test method according to claim 1, wherein an area of a lower surface of the hold-down member (3) is smaller than an area of an upper surface of the test specimen (2).
6. The drop resistance test method according to claim 1, wherein the hold-down member (3) has flat and smooth upper and lower surfaces.
7. The drop resistance test method according to claim 1, wherein the thickness of the hold-down (3) is larger than the thickness of the test specimen (2).
8. The drop resistance test method according to claim 1, wherein the weight of the hold-down member (3) is larger than the weight of the test specimen (2).
9. The drop resistance test method according to claim 1, wherein the lower member (3) and the impact member (4) are made of hard rigid materials.
10. The utility model provides an anti drop capability test device, its characterized in that includes testing platform, support piece (1), holding down (3) and striking (4), support piece (1) holding down (3) and striking (4) are all placed on testing platform, support piece (1) has coarse first surface, support piece (1) is used for supporting testing sample (2), holding down (3) are used for pushing down testing sample (2), striking (4) are used for the striking holding down (3), work as striking (4) are in free fall motion is done to the top of holding down (3) and when striking holding down (3), holding down (3) will receive the impact uniform transfer for testing sample (2).
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116183152A (en) * | 2023-04-23 | 2023-05-30 | 西安曜合信息科技有限公司 | Method for testing impact resistance of building curtain wall |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116183152A (en) * | 2023-04-23 | 2023-05-30 | 西安曜合信息科技有限公司 | Method for testing impact resistance of building curtain wall |
| CN116183152B (en) * | 2023-04-23 | 2023-09-29 | 西安曜合信息科技有限公司 | Method for testing impact resistance of building curtain wall |
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