CN113390713A - Clamp for bonding shear test piece by carbon fiber nitrile rubber and manufacturing method - Google Patents

Clamp for bonding shear test piece by carbon fiber nitrile rubber and manufacturing method Download PDF

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Publication number
CN113390713A
CN113390713A CN202110625913.2A CN202110625913A CN113390713A CN 113390713 A CN113390713 A CN 113390713A CN 202110625913 A CN202110625913 A CN 202110625913A CN 113390713 A CN113390713 A CN 113390713A
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China
Prior art keywords
carbon fiber
plate
test piece
bonding
positioning
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Withdrawn
Application number
CN202110625913.2A
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Chinese (zh)
Inventor
郑健
王鹏博
周长省
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Nanjing University of Science and Technology
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Nanjing University of Science and Technology
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Priority to CN202110625913.2A priority Critical patent/CN113390713A/en
Publication of CN113390713A publication Critical patent/CN113390713A/en
Withdrawn legal-status Critical Current

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/02—Details
    • G01N3/04—Chucks
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00—Sampling; Preparing specimens for investigation
    • G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
    • G01N1/286—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q involving mechanical work, e.g. chopping, disintegrating, compacting, homogenising
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00—Sampling; Preparing specimens for investigation
    • G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
    • G01N1/44—Sample treatment involving radiation, e.g. heat
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00—Sampling; Preparing specimens for investigation
    • G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
    • G01N1/286—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q involving mechanical work, e.g. chopping, disintegrating, compacting, homogenising
    • G01N2001/2873—Cutting or cleaving
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/0014—Type of force applied
    • G01N2203/0026—Combination of several types of applied forces
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/02—Details not specific for a particular testing method
    • G01N2203/026—Specifications of the specimen
    • G01N2203/0298—Manufacturing or preparing specimens
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/02—Details not specific for a particular testing method
    • G01N2203/04—Chucks, fixtures, jaws, holders or anvils
    • G01N2203/0423—Chucks, fixtures, jaws, holders or anvils using screws

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  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)

Abstract

The invention discloses a clamp for a carbon fiber nitrile rubber bonding shearing test piece and a manufacturing method thereof. According to the invention, the carbon fiber plate and the aluminum plate are fixed on the positioning plate through the positioning pin, so that the bonding of the test piece is facilitated, the fastening nut is used for applying pressure to the bonded test piece, the bonding surface of the test piece is tightly attached, the numerical values on the fixed screw rod scale and the pressure display are read in real time, the level of the pressure plate and the pressure applied by the fastening nuts at two ends are ensured to be consistent, and therefore, all the bonded test pieces bear the same pressurizing environment. The method can be used for manufacturing the carbon fiber nitrile rubber bonding shearing test pieces in batches, and effectively ensuring the uniform adhesion and full solidification of the test pieces, so that more accurate nitrile-phenolic adhesive bonding shearing parameters can be obtained.

Description

Clamp for bonding shear test piece by carbon fiber nitrile rubber and manufacturing method
Technical Field
The invention belongs to the field of tensile shear tests of adhesives, and particularly relates to a clamp for a carbon fiber nitrile rubber adhesive shear test piece and a manufacturing method thereof.
Background
Chinese patent CN105606464A discloses a method for manufacturing a test piece for an adhesive lap-joint shear test, which relates to a device capable of fixing a lap-joint shear test piece, applying a fixed pressure to the test piece, and displaying the pressure value. The device will paint the test piece that glues and put between mounting panel and the clamp plate that anchor clamps were tailor-made for the overlap joint test piece, can guarantee accurately that the width that splices prevents that the test piece from taking place to remove when exerting pressure, leads to the overlap joint width to change. The pressurizing system with the pressure sensor and the display device is used for pressurizing the test piece, and the applied pressure can be clearly displayed, so that the curing pressure of the test piece is in a range specified by a standard, and the accuracy of a test result is ensured. The device can accurately control the pressure born by the bonding test piece, but the structure is relatively complex, the operation is complex, the device can not be placed in a vacuum drying box, the high-temperature curing is carried out on the test piece, the mounting plate space of the device is also very limited, and the batch production of the test piece can not be realized.
Chinese patent CN112304730A discloses "an adhesive shear strength test piece and a manufacturing method thereof", in which strip-shaped through holes are symmetrically arranged along the length direction of the adhesive test piece, the strip-shaped through holes extend along the width direction of the adhesive test piece, the adhesive test piece is positioned by positioning holes at two ends, the middle part is used as an adhesive area, after curing, only two adjacent strip-shaped through holes in the horizontal direction of the adhesive test piece a need to be close to the adhesive area for cutting, and the adhesive surface does not need to be affected. The positioning hole in the method can only be used for fixing the test piece when bonding the test piece, cannot be used for fixing the test piece when cutting, other clamps are needed for fixing, and meanwhile, the method does not have a device for applying fixing pressure to promote the solidification of the adhesive.
Disclosure of Invention
The invention aims to provide a clamp for a carbon fiber nitrile rubber bonding shearing test piece and a manufacturing method thereof.
The technical solution for realizing the purpose of the invention is as follows:
a clamp for bonding a shear test piece by using carbon fiber nitrile rubber comprises a fastening nut 1, a pressing plate 2, a positioning plate 3, a gasket 4, a fixing screw rod 5, an annular pressure sensor 6 and a base 8;
the front end and the rear end of the base 8 are fixed with fixing screws 5; the fixing screw rod 5 is sequentially provided with a fastening nut 1, a gasket 4, an annular pressure sensor 6 and a pressure plate 2 from top to bottom; the left end and the right end of the base 8 are fixedly provided with positioning plates 3 which are respectively used for supporting and positioning the carbon fiber plate 12 and the aluminum plate 16; a plurality of positioning holes are formed in the positioning plate 3 and used for installing and positioning the carbon fiber plate 12 and the aluminum plate 16;
the upper part of the fixed screw rod 5 is provided with external threads, the lower part of the fixed screw rod is provided with a polished rod, and scales are drawn on the polished rod and used for reading the distance between the bottom surface of the pressing plate 2 and the top surface of the positioning plate 3 by a ruler; the pressing plate 2 applies pre-tightening force to the carbon fiber plate 12 and the aluminum plate 16, and the annular pressure sensor 6 is used for detecting the pre-tightening force.
A manufacturing method of a carbon fiber nitrile rubber bonding shear test piece comprises the following steps:
step 1, fixing a carbon fiber plate 12 and an aluminum plate 16 on positioning plates 3 on two sides respectively through positioning pins 17, coating a butyronitrile-phenol adhesive 13 on the lower surface of the carbon fiber plate 12 and the upper surface of a butyronitrile rubber 14, standing, and bonding the two surfaces coated with the butyronitrile-phenol adhesive 13 together after the butyronitrile-phenol adhesive 13 is air-dried;
step 2, coating epoxy resin glue 15 on the lower surface of the nitrile rubber 14 and the upper surface of the aluminum plate 16 for lap joint and bonding;
step 3, contacting the pressing plate 2 with the upper surfaces of all bonding pieces, applying pretightening force to the applying pressing plate 2 by using the fastening nuts 1 to enable the bonding surfaces of the bonding test pieces to be tightly attached, reading the scale of the fixed screw 5 and the acquired pressure value in real time, and ensuring that the pressing plate 2 is horizontal and the pressures applied by the fastening nuts 1 at the two ends of the pressing plate are consistent;
step 4, placing the bonding piece and the clamp in a vacuum drying oven, and preserving heat and curing;
and 5, removing the high-temperature environment, and storing in a drying oven at room temperature to completely cure the butyronitrile-phenol aldehyde adhesive 13 and the epoxy resin adhesive 15.
Compared with the prior art, the invention has the following remarkable advantages:
(1) the graduated scales on the two fixing screws can be used for checking the horizontal degree of the pressing plate, and the two annular pressure sensors can be used for checking the force borne by the two ends of the pressing plate, so that the bonded test piece is guaranteed to bear the same pressurizing environment.
(2) The fixture is simple in structure and convenient to operate, the test piece can be fixed only by the positioning pin, and the test piece is fixed in an auxiliary mode without an extra positioning device when the test piece is cut.
(3) The positioning plate is small in size and light in weight, can be placed in a high-temperature environment for use, and is convenient for bonding a test piece for high-temperature curing; the positioning plate has compact and sufficient space, and can be used for manufacturing the bonded test pieces in batches.
(4) The height of the pressing plate can be adjusted through the fixing screw rod, and the pressing plate can be used for manufacturing other bonding shearing test pieces.
Drawings
FIG. 1 is an oblique view of a carbon fiber nitrile rubber bonding shear test piece fixture of the invention.
FIG. 2 is a front view of the clamp for a carbon fiber nitrile rubber bonding shear test piece according to the invention.
FIG. 3 is a left side view of the carbon fiber nitrile rubber bonding shear test piece fixture of the present invention.
FIG. 4 is a schematic structural diagram of a carbon fiber nitrile rubber bonded shear test piece.
FIG. 5 is a top view of a carbon fiber nitrile rubber bonded shear test piece.
FIG. 6 is a schematic diagram of a test piece manufactured by a carbon fiber nitrile rubber bonding shear test piece clamp.
In the figure:
1-fastening nut, 2-pressing plate, 3-positioning plate, 4-gasket, 5-fixing screw, 6-annular pressure sensor, 7-pressure display, 8-base, 9-positioning hole, 10-positioning groove, 11-data line, 12-carbon fiber plate, 13-butyronitrile-phenolic adhesive, 14-butyronitrile rubber, 15-epoxy resin adhesive, 16-aluminum plate and 17-positioning pin
Detailed Description
The invention is further described with reference to the following figures and embodiments.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
With reference to fig. 1, 2 and 3, a method for manufacturing a carbon fiber nitrile rubber bonding shear test piece uses a clamp which can fix the bonding test piece and also can adjust the height of a pressure plate and apply pressure to the test piece.
The used clamp comprises a fastening nut 1, a pressing plate 2, a positioning plate 3, a gasket 4, a fixing screw rod 5, an annular pressure sensor 6, a pressure display 7, a base 8, a positioning hole 9, a positioning groove 10 and a data wire 11.
The gasket 4, the annular pressure sensor 6 and the pressure plate 2 are sequentially sleeved between the fastening nut 1 and the fixing screw rod 5 from top to bottom and are connected through threads; the positioning plate 3 and the fixing screw 5 are fixedly connected with the base 8; the annular pressure sensor 6 is connected with the pressure display 7 through a data line 11, can read the pretightening force applied by the fastening nut 1 and is used for displaying the pressure value born by the test piece in real time; the pressure display 7 is arranged on the base 8 and stands on two sides of the base 8.
The fixed screws 5 are symmetrically arranged on the front side and the rear side of the positioning plate 3, and the length and the thread size are consistent; the upper part of the fixing screw rod 5 is provided with external threads, the lower part of the fixing screw rod is provided with a polished rod, a graduated scale is drawn on the polished rod, and the distance between the bottom surface of the pressing plate 2 and the top surface of the positioning plate 3 can be read for checking the horizontal degree of the pressing plate 2.
The pressing plate 2 is made of No. 45 steel and is connected with the fixing screw rods 5 on two sides through holes.
Locating plates 3 are fixed to the left end and the right end of the base 8, the locating holes 9 are evenly distributed in the locating plates 3, the diameters of the locating holes are 10mm, and the locating holes are used for fixing the carbon fiber plate 12 and the aluminum plate 16 when a test piece is bonded. The upper surface of the positioning plate 3 is provided with a sunken positioning groove 10 to form a step surface for positioning the carbon fiber plate 12 or the aluminum plate 16, so that the installation position of the carbon fiber plate 12 or the aluminum plate 16 is fixed, and the lap joint position of the carbon fiber plate 12 and the aluminum plate is limited.
The annular pressure sensor 6 is high temperature resistant and can work at the ambient temperature of 80 ℃ for a long time.
With reference to fig. 6, a method for manufacturing a carbon fiber nitrile rubber bonding shear test piece comprises the following steps:
the method comprises the following steps: respectively processing a carbon fiber plate 12, nitrile rubber 14 and an aluminum plate 16, keeping the surfaces flat and smooth and the edges flush, and cleaning the surfaces of all the materials by using absolute ethyl alcohol;
step two: respectively fixing a carbon fiber plate 12 and an aluminum plate 16 on the positioning plates 3 at two sides through positioning pins 17, coating butyronitrile-phenolic adhesive 13 on the lower surface of the carbon fiber plate 12 and the upper surface of the butyronitrile rubber 14, standing for 10 minutes, and bonding the two surfaces coated with the butyronitrile-phenolic adhesive 13 together after the butyronitrile-phenolic adhesive 13 is air-dried;
step three: coating epoxy resin glue 15 on the lower surface of the nitrile rubber 14 and the upper surface of the aluminum plate 16 for lap bonding;
step four: the pressing plate 2 is contacted with the upper surfaces of all bonding pieces, the fastening nuts 1 are utilized to apply pre-tightening force to the applying pressing plate 2, so that the bonding surfaces of the bonding pieces are tightly attached, the numerical values on the graduated scale of the fixed screw 5 and the pressure display 7 are read in real time, the level of the pressing plate 2 and the pressure applied by the fastening nuts 1 at two ends of the pressing plate are ensured to be consistent, and all the bonding pieces bear the same pressurizing environment;
step five: placing the bonding piece and the clamp in a vacuum drying oven, and carrying out heat preservation and solidification at 80 ℃;
step six: and removing the high-temperature environment, and storing in a drying oven at room temperature to completely cure the butyronitrile-phenol aldehyde adhesive 13 and the epoxy resin adhesive 15.
Step seven: and cutting the bonded test piece along the length direction of the bonded test piece, and finishing the manufacture of the test piece.
The butyronitrile-phenol aldehyde adhesive 13 is 730 adhesive, and the epoxy resin adhesive 15 is epoxy resin AB adhesive which has higher bonding strength and higher temperature resistance than the butyronitrile-phenol aldehyde adhesive 13.
The positioning holes of the carbon fiber plate 12 and the aluminum plate 16 can be used for fixing on the positioning plate during bonding and can also be used for connecting a clamp during tensile shearing of a test piece.

Claims (8)

1. The clamp for bonding the carbon fiber nitrile rubber to the shear test piece is characterized by comprising a fastening nut (1), a pressing plate (2), a positioning plate (3), a gasket (4), a fixing screw (5), an annular pressure sensor (6) and a base (8);
the front end and the rear end of the base (8) are fixed with fixed screws (5); the fixing screw rod (5) is sequentially provided with a fastening nut (1), a gasket (4), an annular pressure sensor (6) and a pressing plate (2) from top to bottom; the left end and the right end of the base (8) are fixedly provided with positioning plates (3) which are respectively used for supporting and positioning the carbon fiber plate (12) and the aluminum plate (16); a plurality of positioning holes are formed in the positioning plate (3) and used for installing and positioning the carbon fiber plate (12) and the aluminum plate (16);
the upper part of the fixed screw rod (5) is provided with external threads, the lower part of the fixed screw rod is provided with a polished rod, and scales are drawn on the polished rod and used for reading the distance between the bottom surface of the pressing plate (2) and the top surface of the positioning plate (3) by a ruler; the pressing plate (2) applies pre-tightening force to the carbon fiber plate (12) and the aluminum plate (16), and the annular pressure sensor (6) is used for detecting the pre-tightening force.
2. The clamp for the carbon fiber nitrile rubber bonding shear test piece according to claim 1, wherein a sunken positioning groove (10) is formed in the upper surface of the positioning plate (3) to form a step surface for positioning a carbon fiber plate (12) or an aluminum plate (16).
3. The clamp for the carbon fiber nitrile rubber bonding shear test piece according to claim 1, wherein the pressure plate (2) is made of No. 45 steel.
4. The clamp for the carbon fiber nitrile rubber bonding shear test piece according to claim 1, wherein the diameter of the positioning hole (9) is 10 mm.
5. The manufacturing method of the carbon fiber nitrile rubber bonding shear test piece is characterized by comprising the following steps:
step 1, fixing a carbon fiber plate (12) and an aluminum plate (16) on positioning plates (3) at two sides respectively through positioning pins (17), coating butyronitrile-phenolic adhesive (13) on the lower surface of the carbon fiber plate (12) and the upper surface of butyronitrile rubber (14), standing, and bonding the two surfaces coated with the butyronitrile-phenolic adhesive (13) together after the butyronitrile-phenolic adhesive (13) is air-dried;
step 2, coating epoxy resin glue (15) on the lower surface of the nitrile rubber (14) and the upper surface of the aluminum plate (16) for lap joint and bonding;
step 3, contacting the pressing plate (2) with the upper surfaces of all bonding pieces, applying pretightening force to the applying pressing plate (2) by using the fastening nuts (1) to enable the bonding surfaces of the bonding test pieces to be tightly attached, reading the graduated scale of the fixed screw (5) and the acquired pressure value in real time, and ensuring that the pressing plate (2) is horizontal and the pressures applied by the fastening nuts (1) at the two ends are consistent;
step 4, placing the bonding piece and the clamp in a vacuum drying oven, and preserving heat and curing;
and 5, removing the high-temperature environment, and storing in a drying oven at room temperature to completely cure the butyronitrile-phenolic adhesive (13) and the epoxy resin adhesive (15).
6. The method for manufacturing the carbon fiber nitrile rubber bonding shear test piece according to claim 5, further comprising a step 6 of cutting the bonding test piece into a plurality of test pieces.
7. The manufacturing method of the carbon fiber nitrile rubber bonding shear test piece according to claim 5, wherein the nitrile-phenolic adhesive (13) is 730 adhesive.
8. The method for manufacturing the carbon fiber nitrile rubber bonding shear test piece according to claim 5, wherein the epoxy resin glue (15) is epoxy resin AB glue.
CN202110625913.2A 2021-06-04 2021-06-04 Clamp for bonding shear test piece by carbon fiber nitrile rubber and manufacturing method Withdrawn CN113390713A (en)

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CN202110625913.2A CN113390713A (en) 2021-06-04 2021-06-04 Clamp for bonding shear test piece by carbon fiber nitrile rubber and manufacturing method

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Application Number Priority Date Filing Date Title
CN202110625913.2A CN113390713A (en) 2021-06-04 2021-06-04 Clamp for bonding shear test piece by carbon fiber nitrile rubber and manufacturing method

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115078130A (en) * 2022-08-23 2022-09-20 江苏华恬节能科技有限公司 Plastic products shear strength testing arrangement

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN203658156U (en) * 2013-12-23 2014-06-18 美巢集团股份公司 Fixture for determining shearing intensity of tackiness agent
CN105606464A (en) * 2016-02-25 2016-05-25 哈尔滨飞机工业集团有限责任公司 Test sheet making method for adhesive overlap joint shear test
CN105738174A (en) * 2016-02-25 2016-07-06 哈尔滨飞机工业集团有限责任公司 Manufacturing method of test sheet for adhesive floating and stripping test
CN106596296A (en) * 2017-02-25 2017-04-26 浙江理工大学 Single fiber interfacial shear strength testing method and device
CN108106991A (en) * 2017-12-15 2018-06-01 超威电源有限公司 A kind of fluid sealant bond strength detection device and method

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN203658156U (en) * 2013-12-23 2014-06-18 美巢集团股份公司 Fixture for determining shearing intensity of tackiness agent
CN105606464A (en) * 2016-02-25 2016-05-25 哈尔滨飞机工业集团有限责任公司 Test sheet making method for adhesive overlap joint shear test
CN105738174A (en) * 2016-02-25 2016-07-06 哈尔滨飞机工业集团有限责任公司 Manufacturing method of test sheet for adhesive floating and stripping test
CN106596296A (en) * 2017-02-25 2017-04-26 浙江理工大学 Single fiber interfacial shear strength testing method and device
CN108106991A (en) * 2017-12-15 2018-06-01 超威电源有限公司 A kind of fluid sealant bond strength detection device and method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115078130A (en) * 2022-08-23 2022-09-20 江苏华恬节能科技有限公司 Plastic products shear strength testing arrangement

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