Fiber impregnation tensile sample preparation device

Abstract

The utility model discloses a device for preparing a fiber impregnation tensile sample. The device comprises a bracket, a bottom plate and a pressing plate, a bottom plate is horizontally arranged on the bracket, and two gauge lines which are parallel to each other are arranged on the bottom plate; long-strip-shaped glue scraping through holes are formed in the positions, close to the two scale distance lines, of the opposite inner sides of the two scale distance lines respectively, and the lengths of the glue scraping through holes are matched with the lengths of the scale distance lines; a plurality of wire guiding grooves are evenly formed in the portion, between the two glue scraping through holes, of the bottom plate, and the length direction of the wire guiding grooves is perpendicular to the length direction of the scale distance line. The method has the advantages that the scale distance of the prepared sample is more accurate, and the appearance is more attractive; the sample preparation success rate and efficiency of the fiber impregnation sample can be improved; after the redundant colloid cleaning space is increased, sufficient bonding glue liquid can be smeared, meanwhile, redundant colloid can be cleaned in time, it is guaranteed that the reinforcing piece and fibers are bonded firmly and reliably, and therefore a fiber sample is not prone to slipping in the tensile test process and not prone to slipping off from the reinforcing piece, and the accuracy of test data is improved.

Description

Technical field:

[0001] The utility model relates to a sample preparation device, in particular to a fiber dipped tensile sample preparation device. Background technology:

[0002] F-12 fiber is widely used in helicopters, fixed-wing aircraft, helmets, solid rocket engines, aviation, aerospace and other fields due to its excellent properties such as low density, high strength, high temperature resistance and corrosion resistance. The dip method is an important method for evaluating fiber performance to test the tensile breaking strength, tensile elastic modulus and elongation at break of aramid multifilament. In order to ensure that the fiber does not slip during the fiber tensile test and the break does not occur in the clamping section of the fixture, it is necessary to paste reinforcing sheets at both ends of the fiber. Therefore, pasting reinforcing sheets on dipped fiber samples is an important task in the sample preparation process. The existing pasted sample preparation usually involves pasting reinforcing sheets with colloid on both ends of the fiber, then clamping them with wooden boards, and then firmly bonding the reinforcing sheets to the fibers after the colloid solidifies. However, in the process of clamping with the template, excess adhesive colloid is often squeezed out at both ends of the reinforcing sheet. After the excess colloid is solidified, the effective test spacing of the prepared sample will be shortened, resulting in inaccurate tensile test results. Moreover, after the squeezed excess colloid solidifies, the impregnated wire and the wooden board or the bottom plate of the sample preparation device will be solidified into one, resulting in damage to the sample when the prepared sample is taken out, thereby causing sample preparation failure. Therefore, there is a problem of low sample preparation success rate, and the sample gauge length between the reinforcing sheets is shortened due to the influence of the excess colloid, and thus accurate and effective test results cannot be obtained during the test. Utility model content:

[0003] In order to solve the above problems, the purpose of the utility model is to provide a fiber dipping tensile test sample preparation device, which can greatly improve the success rate of sample preparation, has a simple structure and is easy to use.

[0004] The utility model is implemented by the following technical solutions:

[0005] A fiber dipped tensile specimen preparation device comprises a bracket, a bottom plate and a pressing plate;

[0006] The bottom plate is horizontally arranged on the bracket, and two mutually parallel gauge lines are arranged on the bottom plate;

[0007] A long strip-shaped scraper through hole is respectively provided on the opposite inner sides of the two gauge lines and close to the two gauge lines, and the length of the scraper through hole matches the length of the gauge line;

[0008] A plurality of wire-leading grooves are evenly provided on the bottom plate between the two scraping glue through holes, the length direction of the wire-leading grooves is perpendicular to the length direction of the gauge line, and the two ends of the wire-leading grooves are respectively connected to the two scraping glue through holes;

[0009] A plurality of limit clamping blocks are fixedly provided on the edge of the top surface of the bottom plate, and the pressing plate is clamped on the bottom plate through the limit clamping blocks.

[0010] Furthermore, a plurality of weight placement slots are provided on the pressing plate.

[0011] Furthermore, the bracket is a lifting bracket.

[0012] Furthermore, a plurality of weight-reducing holes are provided on the bottom plate between the two wire guide grooves.

[0013] Furthermore, long strip rubber pads are movably provided on the relatively outer sides of the two gauge lines and close to the two gauge lines.

[0014] Advantages of the utility model:

[0015] 1. The gauge length of the sample prepared by the utility model is more accurate and the appearance is more beautiful;

[0016] 2. It can improve the success rate and efficiency of fiber impregnation sample preparation;

[0017] 3. After the excess colloid cleaning space is increased, sufficient adhesive liquid can be applied, and the excess colloid can be cleaned in time to ensure that the reinforcing sheet and the fiber are firmly and reliably bonded, so that the fiber sample is not easy to slip during the tensile test, and is not easy to slip out of the reinforcing sheet, thereby improving the accuracy of the test data. Description of the drawings:

[0018] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 It is a structural schematic diagram of this embodiment;

[0020] Figure 2 Schematic diagram of the structure of the pressing plate in this embodiment;

[0021] Figure 3 Schematic diagram of the structure of the rubber pad in this embodiment.

[0022] In the figure: bracket 1, bottom plate 2, pressure plate 3, gauge line 4, glue scraping hole 5, wire guide groove 6, limit block 7, weight placement groove 8, weight reduction hole 9, rubber pad 10. Specific implementation method:

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] Embodiment 1:

[0025] like Figure 1-3 The fiber dipped tensile specimen preparation device shown comprises a bracket 1, a bottom plate 2 and a pressing plate 3; the bracket 1 is a lifting bracket 1, and the bracket 1 can be lowered during the preparation process for easy operation; when scraping the glue, the bracket 1 can be raised to facilitate scraping off the squeezed colloid from the scraping hole under the bottom plate 2.

[0026] A bottom plate 2 is horizontally arranged on the bracket 1, and two mutually parallel gauge lines 4 are arranged on the bottom plate 2, and the distance between the two gauge lines 4 meets the requirements of the effective test distance of the dipping test;

[0027] A long strip-shaped scraping glue through hole 5 is respectively opened on the opposite inner side of the two gauge lines 4 and close to the two gauge lines 4. The length of the scraping glue through hole 5 matches the length of the gauge lines 4, so that the extruded colloid can be scraped off cleanly, thereby ensuring that the effective test distance of the prepared sample meets the test requirements;

[0028] A plurality of wire guide grooves 6 are evenly arranged on the bottom plate 2 between the two scraper holes 5. The length direction of the wire guide grooves 6 is perpendicular to the length direction of the gauge line 4, and the two ends of the wire guide grooves 6 are respectively connected to the two scraper holes 5. A plurality of weight reduction holes 9 are arranged on the bottom plate 2 between the two wire guide grooves 6 to reduce weight and facilitate operation.

[0029] A plurality of limit blocks 7 are fixedly provided on the edge of the top surface of the bottom plate 2, and the pressing plate 3 is clamped on the bottom plate 2 through the limit blocks 7. A plurality of weight placement grooves 8 are provided on the pressing plate 3 to better fix the weights and prevent the weights from falling and affecting the squeezing effect on the reinforcing sheet. Long strip rubber pads 10 are movably provided at the positions opposite to and adjacent to the two gauge lines 4.

[0030] Directions:

[0031] (1) placing a long rubber pad 10 on the opposite outer sides of the two gauge lines 4 and close to the two gauge lines 4;

[0032] (2) Apply sufficient adhesive colloid on the sand surface of two sandpaper belts as reinforcement sheets, place them on two rubber pads 10 respectively, and align them with the corresponding gauge lines 4 respectively;

[0033] (3) placing the dipped multifilaments in sequence in the wire drawing groove 6 provided on the bottom plate 2;

[0034] (4) Take two more pieces of sandpaper, apply sufficient adhesive colloid on the sand surface, and place the side with the colloid facing down on the dipped multifilament, aligning it with the reinforcement sheet at the bottom;

[0035] (5) After standing at room temperature for 1 hour, a rubber pad 10 is placed on the two layers of reinforcing sheets, and then an acrylic pressing plate 3 is placed on top, and a weight is placed in the weight placement slot 8 of the pressing plate 3;

[0036] (6) Raise the lifting bracket 1 to an appropriate height, and use a silicone scraper to scrape off the excess colloid squeezed out from the scraping hole of the pressing plate 3. After cleaning, cure at room temperature for no less than 24 hours;

[0037] (7) After curing is completed, the entire set of fiber samples is removed from the base plate 2, the reinforcing sheets with bonded fibers are cut into specified sizes, and the samples are stacked together according to the batch numbers. The prepared fiber samples can then be subjected to tensile testing.

[0038] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A fiber dip tensile test specimen preparation device, characterized in that: It comprises a bracket, a bottom plate and a pressing plate; the bottom plate is horizontally arranged on the bracket, and two mutually parallel gauge lines are arranged on the bottom plate; A long strip-shaped scraper through hole is respectively provided on the opposite inner sides of the two gauge lines and close to the two gauge lines, and the length of the scraper through hole matches the length of the gauge line; A plurality of wire-leading grooves are evenly provided on the bottom plate between the two scraping glue through holes, the length direction of the wire-leading grooves is perpendicular to the length direction of the gauge line, and the two ends of the wire-leading grooves are respectively connected to the two scraping glue through holes; A plurality of limit clamping blocks are fixedly provided on the edge of the top surface of the bottom plate, and the pressing plate is clamped on the bottom plate through the limit clamping blocks.

2. A fiber dipped tensile specimen preparation device according to claim 1, characterized in that: A plurality of weight placement slots are arranged on the pressing plate.

3. The fiber dipped tensile specimen preparation device according to claim 1, characterized in that: The bracket is a lifting bracket.

4. The fiber dipped tensile specimen preparation device according to claim 1, characterized in that: A plurality of weight-reducing holes are provided on the bottom plate between the two wire-leading grooves.

5. The fiber dipped tensile specimen preparation device according to claim 1, characterized in that: Long strip rubber pads are movably provided at positions relatively outside the two gauge lines and close to the two gauge lines.

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