Sample column clamping device for testing bonding performance of coating

Abstract

A sample column clamping device for testing the bonding performance of a coating is provided with two parts which are symmetrically arranged, and a testing machine connecting base, a connecting column, a ball joint switching unit and a sample column are arranged in each part; the testing machine connecting base is fixed on a tension testing machine force applying component, connecting column assembling holes are formed in the testing machine connecting base, and the central axes of the connecting column assembling holes of the testing machine connecting base in the left part and the right part coincide; the connecting column is sleeved in a connecting column assembling hole of the testing machine connecting base, and the connecting column and the testing machine connecting base are assembled through a pin penetrating through the connecting column in the radial direction; the ball joint switching unit is positioned between the connecting column and the inner side end of the sample column; the outer end face of the sample column is uniformly coated with a curing coating material, and the coating material is bonded and cured with the end face of the other part of the sample column which is symmetrically arranged. According to the utility model, the purposes of ensuring the reliability of test results and improving the test working efficiency are achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to test, measurement technical field, concretely is the sample column clamping device of the tensile test carried out to the object surface coating combination performance test. BACKGROUND

[0002] According to the requirement of GB / T 5210-2006 "color paint and varnish pull-off method adhesion test", when carrying out pull-off method adhesion test to the object surface coating, need to focus on two aspects problem, one is the vertical direction of coating substrate plane even stretch stress is applied, does not allow any torsion and shearing action, two is the test process of each type surface coating adhesion carries out 6 parallel tests at least, requires that sample column clamping device can be connected with tensile testing machine and test sample column conveniently, quickly. Therefore needs to design a kind of sample column clamping device for coating combination performance test to meet the requirement of test standard. UTILITY MODEL CONTENT

[0003] The utility model provides a kind of sample column clamping device for coating combination performance test, it aims at the cooperation of test machine connecting base, connecting column, ball joint adapter unit and sample column, to realize in the vertical direction of coating substrate plane even stretch stress is applied, and make sample column can be connected with tensile testing machine and clamping device conveniently, quickly, reach the purpose of guaranteeing the reliability of test result, improving test efficiency.

[0004] To achieve the above object, the utility model adopts the following technical scheme:

[0005] A kind of sample column clamping device for coating combination performance test is equipped with two parts of symmetrical arrangement, test machine connecting base, connecting column, ball joint adapter unit and sample column are respectively arranged in each part;The test machine connecting base is fixed on the force component of tensile testing machine, connecting column assembly hole is set on test machine connecting base, the center axis of test machine connecting base connecting column assembly hole in left and right two parts coincides;The connecting column is sleeved in the connecting column assembly hole of test machine connecting base, and connecting column is assembled with test machine connecting base by the pin that passes through radially;Ball joint adapter unit is located between the inner side end of connecting column and sample column;The outer end face of sample column is evenly coated with solidified coating material, and the coating material is bonded and solidified together with the end face of sample column in the other part of symmetrical arrangement.

[0006] The above-mentioned sample column clamping device for coating combination performance test, the outer side end of connecting column is equipped with the connecting column threaded hole matched with ball joint adapter unit;The inner side end of sample column is provided with external thread.

[0007] The ball joint adapter unit comprises a ball head assembly and a ball head seat assembly; one end of the ball head assembly is a ball head, and the other end is provided with a threaded hole matched with a threaded hole of a connecting column; one end of the ball head seat assembly is provided with a spherical curved recess, the ball head of the ball head assembly is embedded in the spherical curved recess, and the other end of the ball head seat assembly is provided with a threaded hole of a ball head seat.

[0008] The connecting column is provided with a radial through assembly hole, and the assembly hole is a long hole extending along an axis, and the width size of the long hole is not less than the diameter size of a pin through hole on a connecting base of a testing machine.

[0009] The ball head assembly of the ball joint adapter unit is provided with a locking nut outside the threaded column.

[0010] The ball head assembly and the ball head seat assembly of the ball joint adapter unit are provided with screwing clamping planes on the outer side walls, wherein the screwing clamping plane on the outer side wall of the ball head assembly is located on the side close to the ball head, and the screwing clamping plane on the outer side wall of the ball head seat assembly is located on one end of the threaded hole of the ball head seat.

[0011] The utility model provides a kind of sample column clamping device for coating bonding performance test, it can be matched by the cooperation of the connecting base of testing machine, connecting column, ball joint adapter unit and sample column in two parts of symmetrical arrangement, ensure that the pulling force applied by testing machine is perpendicular to coating substrate plane in the test process, avoid the influence of torsion or shearing force on test result, ensure the reliability of test data.The utility model structure, long hole is provided with in radial through on connecting column, when sample column is clamped, connecting column can be moved along axis by the long hole of connecting column, and it provides the operable space for the assembly of sample column, so that sample column can be conveniently and quickly connected with tensile testing machine and clamping device, so as to improve the working efficiency of test.The utility model is provided with screwing clamping plane on the outer side wall of the ball head assembly and the ball head seat assembly of ball joint adapter unit, and the clamping of sample column is more convenient by the cooperation of screwing tool and screwing clamping plane. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is the assembly structure schematic view of the utility model;

[0013] Figure 2 It is the structure schematic view of sample column;

[0014] Figure 3 It is the structure schematic view of ball joint adapter unit;

[0015] Figure 4is a schematic diagram of a cross-sectional structure of a ball joint adapter unit;

[0016] Figure 5 is a schematic diagram of a connecting column structure;

[0017] Figure 6 is a schematic diagram of a cross-sectional structure of a connecting column.

[0018] Explanation of the reference numerals in the drawings:

[0019] 1 is a sample column, 1-1 is a coating material, and 1-2 is an external thread;

[0020] 2 is a ball joint adapter unit

[0021] 2-1 is a ball head assembly, 2-1-1 is a ball head, and 2-1-2 is a stud;

[0022] 2-2 is a ball head seat assembly, 2-2-1 is a spherical curved groove, and 2-2-2 is a ball head seat threaded hole;

[0023] 3 is a connecting column, 3-1 is a connecting assembly threaded hole, and 3-2 is an assembly hole;

[0024] 4 is a testing machine connecting base, and 4-1 is a connecting column assembly hole;

[0025] 5 is a locking nut;

[0026] 6 is a pin. DETAILED DESCRIPTION

[0027] The utility model will be further described below in combination with the drawings and specific embodiments.

[0028] According to the requirements of GB / T 5210-2006 "Paints and varnishes - Adhesion by cross-hatch - Test methods", when performing the adhesion test by cross-hatch on the surface coating of an object, the test sample is applied on a flat plate with uniform thickness and consistent surface structure. After the coating system is dried / cured, the sample column is directly bonded to the surface of the coating with an adhesive. After the adhesive is cured, the test sample assembly is formed, and then the test sample assembly is placed on a tensile testing machine. The test sample assembly is subjected to a tensile test (cross-hatch test) to measure the tensile force required to break the adhesion between the coating and the substrate. The test results are represented by the measured tensile force data. As can be seen, when performing the adhesion test by cross-hatch on the surface coating of an object, two aspects need to be focused on. First, the tensile stress should be uniformly applied in the vertical direction of the coating substrate plane, and any twisting and shearing action is not allowed. Second, at least 6 parallel tests should be performed for each type of surface coating adhesion test process, and the sample column should be easily and quickly connected with the tensile testing machine and the test sample column clamping device.

[0029] Referring to FIG. 1, Figure 2The utility model provides a kind of sample column clamping device for coating bonding performance test, for the test of the adhesion of aircraft coating, especially radar wave-absorbing coating, in the process of aircraft repair, to meet the requirements of GB / T 5210-2006 "Paint and Varnish Adhesion Test by Tearing Method".The sample column clamping device for coating bonding performance test described in the utility model is provided with two parts arranged symmetrically, a testing machine connecting base 4, a connecting column 3, a ball joint adapter unit 2 and a sample column 1 are arranged in each part respectively;The testing machine connecting base 4 is fixed on the force application part of tensile testing machine, connecting column assembly hole 4-1 is arranged on the testing machine connecting base 4, the center axes of connecting column assembly hole 4-1 of testing machine connecting base in left and right two parts coincide;The connecting column 3 is sleeved in the connecting column assembly hole 4-1 of testing machine connecting base 4, and the connecting column 3 is assembled with the testing machine connecting base 4 by the pin 6 passing through radially;The ball joint adapter unit 2 is located between the connecting column 3 and the sample column 1, and the coaxial connection of the connecting column 3 and the sample column 1 is ensured by the ball joint adapter unit 2;Solidified coating material 1-1 is evenly coated on the outer end face of the sample column 1, and the coating material 1-1 is bonded and solidified with the end face of the sample column 1 in the other part arranged symmetrically.

[0030] Referring to Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 The ball joint adapter unit 2 of the sample column clamping device for coating bonding performance test described in the utility model includes a ball head assembly 2-1 and a ball head seat assembly 2-2;One end of the ball head assembly 2-1 is a ball head 2-1-1, and the other end is provided with a stud 2-1-2, and the ball head assembly 2-1 is assembled with the connecting column 3 in a threaded cooperation mode through the stud 2-1-2;One end of the ball head seat assembly 2-2 is provided with a spherical curved recess 2-2-1, the ball head 2-1-1 of the ball head assembly 2-1 is embedded in the spherical curved recess 2-2-1, the other end of the ball head seat assembly 2-2 is provided with a ball head seat threaded hole 2-2-2, and an external thread 1-2 is arranged on the inside end of the sample column 1, and the sample column 1 is assembled with the ball head seat threaded hole 2-2-2 through the external thread 1-2.

[0031] Referring to Figure 1 、 Figure 4 、 Figure 5 、 Figure 6The utility model discloses a sample column mounting and clamping device for coating bonding performance test, and the connecting column 3 is cylindrical structure, is equipped with the connecting column screw hole 3-1 with the screw post 2-1-2 cooperation of ball head assembly 2-1 in ball joint switching unit 2 on the outside end of connecting column 3 to the outside end of connecting column 3, and is equipped with the assembly hole 3-2 of radial through in the middle part of connecting column 3, the assembly hole 3-2 is the long hole along the axis extension, and the width size is not less than the diameter size of pin through hole on the lateral wall of testing machine connecting base 4, and the pin 6 passes through pin through hole on the lateral wall of testing machine connecting base 4 and the assembly hole 3-2 of connecting column 3 long hole structure, and connecting column 3 is connected with testing machine connecting base 4.

[0032] Referring to Figures 1 to 6 When the utility model is used for coating bonding performance test, first, the outer end surface of the sample column 1 is uniformly coated with solidified coating material 1-1, and the coating material 1-1 is bonded and solidified with the other part of the sample column 1 arranged symmetrically, forming a test sample assembly with external threads 1-2 at both ends, then the external threads 1-2 at both ends of the test sample assembly are assembled with the connecting column screw holes 3-1 of the two groups of ball joint switching units 2 and the two groups of connecting columns 3 arranged symmetrically (for vertical tensile testing machine, the upper and lower symmetric arrangement is adopted), and the ball head assembly 2-1 and the connecting column 3 are locked and fixed through the locking nut 5, then the tensile testing machine is started for test, and the tensile force of the interface (adhesion failure) of the test sample assembly or the tensile force of its own failure (cohesion failure) is used to represent the test result. In the above-mentioned surface coating adhesion test process, usually at least 6 parallel tests are carried out, in order to improve the test work efficiency, the assembly hole 3-2 of the long hole structure is arranged on the connecting column 3, and the connecting column 3 can move along the axis during the clamping process of the test sample assembly, which provides an operable space for the assembly of the test sample assembly, so that the test sample assembly can be conveniently and quickly connected with the tensile testing machine and the sample column mounting and clamping device.

Claims

1. A specimen column mounting device for coating bond performance testing, characterized by: The application relates to a symmetrical two-part ball-joint adapter unit for a tensile testing machine, which is characterized in that a test machine connecting base (4), a connecting column (3), a ball-joint adapter unit (2) and a test sample column (1) are arranged in each part respectively; the test machine connecting base (4) is fixed on a force applying part of a tensile testing machine, a connecting column assembly hole (4-1) is arranged on the test machine connecting base (4), and the center axes of the connecting column assembly holes (4-1) of the test machine connecting bases in the left and right parts coincide; the connecting column (3) is sleeved in the connecting column assembly hole (4-1) of the test machine connecting base (4) and is assembled with the test machine connecting base (4) through a radially penetrating pin (6); the ball-joint adapter unit (2) is located between the inner side end of the connecting column (3) and the test sample column (1); a solidified coating material (1-1) is uniformly coated on the outer end face of the test sample column (1) and is solidified with the end face of the test sample column (1) in the other part arranged symmetrically.

2. The specimen column mounting apparatus for coating bond performance testing of claim 1, wherein: The outer side end of the connecting column (3) is provided with a connecting column threaded hole (3-1) matched with the ball-joint adapter unit (2); and the inner side end of the test sample column (1) is provided with an external thread (1-2).

3. The specimen column mounting apparatus for coating bond performance testing of claim 2, wherein: The ball-joint adapter unit (2) comprises a ball head assembly (2-1) and a ball head seat assembly (2-2); one end of the ball head assembly (2-1) is a ball head (2-1-1), and the other end is provided with a stud (2-1-2) matched with the connecting column threaded hole (3-1); one end of the ball head seat assembly (2-2) is provided with a spherical curved recess (2-2-1), the ball head (2-1-1) of the ball head assembly (2-1) is embedded in the spherical curved recess (2-2-1), and the other end of the ball head seat assembly (2-2) is provided with a ball head seat threaded hole (2-2-2); the inner side end of the test sample column (1) is provided with an external thread (1-2), and the test sample column (1) is assembled with the ball head seat threaded hole (2-2-2) through the external thread (1-2).

4. The test specimen column clamp apparatus for coating bond performance testing of claim 3, wherein: The connecting column (3) is provided with a radially penetrating assembly hole (3-2), and the assembly hole (3-2) is a long hole extending along an axis, and the width size of the long hole is not less than the diameter size of the pin penetrating hole on the test machine connecting base (4).

5. A test specimen column holder arrangement for coating bond performance testing according to claim 3 or 4, characterized in that: A locking nut (5) is sleeved outside the stud (2-1-2) of the ball head assembly (2-1) of the ball-joint adapter unit (2).

6. The specimen column mounting apparatus for coating bond performance testing of claim 5, wherein: A screwing clamping plane (2-3) is arranged on the outer side wall of the ball head assembly (2-1) and the ball head seat assembly (2-2) of the ball-joint adapter unit (2), the screwing clamping plane on the outer side wall of the ball head assembly (2-1) is located on the side close to the ball head (2-1-1), and the screwing clamping plane on the outer side wall of the ball head seat assembly (2-2) is located on the end of the ball head seat threaded hole (2-2-2).

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