JPH11153537A - Method and machine for test of adhesion - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an adhesion test method with reference to a shocking force and to provide an adhesion testing machine for it. SOLUTION: A hammer part 100 which is attached to a pendulum 16 is swung up, and the hammer part 100 is swung down. Thereby, a hitting part 104 which is provided at the hammer part 100 is made to collide with a sample body 200 which is formed by bonding a first member 201, to be bonded, to a second member 202 to be bonded. Thereby, a shock is applied from the shear direction of a bonded face 204, the bonded face 204 is exfoliated, and an impact force at this time is measured by a pressure sensor which is provided at the hammer part 100.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for measuring the bonding strength between members joined by bonding and welding and the bonding strength by welding and the like.

[0002]

2. Description of the Related Art In recent years, the development of adhesive materials has progressed, and tiles,
Adhesive technology is used for fixing wood, metal products, glass, and the like, as well as stones, boards, flooring, and the like. In order to select an optimum adhesive between members to be bonded from various adhesives, an adhesion test is performed in which both members are actually bonded and the bonding strength is measured. In most cases, an adhesion test of a building material or the like is performed statically by load control or displacement control.

[0003]

By the way, not only a static load but also an impact force may be applied to an actual bonded portion. Depending on the properties of the parts joined by bonding or welding, etc., it shows good performance under static load, but when impact force is applied, peeling occurs even at relatively low load / deformation There are cases. However, heretofore, there has been no adhesion test method corresponding to the impact force, and it has not been possible to actually examine the bonding strength with respect to the impact force.

[0004] It is an object of the present invention to provide an adhesion test method for an impact force and an adhesion test machine therefor.

[0005]

Means for Solving the Problems To solve the above problems, the invention according to claim 1 is an adhesion test method, comprising:
Or, from the shear direction of the joint surface of the sample body joined by welding,
For example, the present invention is characterized in that the impact force when the joint surface is separated by applying an impact with a hammer or the like is measured by a sensor that senses the force.

[0006] As described above, the impact force due to the impact applied from the shearing direction of the joint surface of the sample bodies joined by adhesion or welding is transmitted to the joint surface almost uniformly. By this impact force, the joining surface is separated, and the impact force required at that time is
Since the measurement is performed by the sensor that senses the force, it is possible to obtain the joint strength of the joint surface with respect to the impact force applied in an impact. Further, since the impact strength is measured to determine the bonding strength of the bonding surface, the measuring time can be reduced as compared with the conventional static adhesion test by applying a load, and the configuration of a testing machine required for the measurement is reduced. The adhesion test can be performed with a simple operation and with a simple operation.

According to a second aspect of the present invention, there is provided an adhesion tester, comprising: a support base for fixing a sample having a bonding surface formed by bonding or welding; and a supporter for fixing the sample body from a direction along the bonding surface. It is characterized by comprising a hammer section for applying an impact near the joint surface of the sample body, and a sensor attached to the hammer section for sensing a force for measuring an impact force due to the impact.

[0008] In this manner, the sample body having the bonding surface formed by bonding or welding is fixed on the support table, and the hammer is applied to the vicinity of the bonding surface of the sample body from the direction along the bonding surface. To peel off the joint surface of the sample body, attached to the hammer portion, because it is an adhesion tester configured to measure the impact force with a sensor that senses the force,
The joining strength of the joining surface with respect to the impact force impulsively applied to the joining surface can be determined. Further, since the impact force is measured by a sensor that senses the force and the joining strength of the joining surface is obtained, compared with the case where an adhesion tester required for a static adhesion test by applying a load conventionally used is required. The configuration of the testing machine can be simplified, such as no power source is required, the measurement time required for the test can be reduced, and
The adhesion test can be performed with a simple operation.

In the first and second aspects, the sensor for sensing the force is a sensor for sensing the deformation or distortion of the sensor member due to the force. It may be a pressure sensor, a strain sensor using the piezoelectric effect of another substance, a pressure sensor that measures displacement of a sensor member due to pressure, or the like.

According to a third aspect of the present invention, in the adhesion tester according to the second aspect, the sensor for sensing the force is a quartz piezoelectric pressure sensor.

Thus, since the bonding tester according to the second aspect is provided with the quartz-crystal piezoelectric pressure sensor, the bonding strength of the bonding surface with respect to the impact force applied to the bonding surface can be reliably obtained. . In addition, by measuring the impact force with a quartz-crystal piezoelectric pressure sensor and determining the bonding strength of the bonding surface, compared with the case where a bonding tester required for a static bonding test by applying a load conventionally used is required. The configuration of the testing machine can be simplified, for example, a power source is not required, the measurement time can be shortened, and the adhesion test can be performed by a simple operation.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an adhesion test method and an adhesion tester according to the present invention will be described below with reference to FIGS. 1 is a perspective view of an adhesion tester to which the present invention is applied, FIG. 2 is an enlarged explanatory view of a portion A in FIG. 1, and FIG. 3 is an enlarged explanatory view of a portion B in FIG. 1 to 3, 1
Is an adhesion tester, 3 is a support base, 16 is a pendulum, 100 is a hammer, 107 is a quartz-crystal piezoelectric pressure sensor, 200 is a sample body, and 204 is a bonding surface.

As shown in FIG. 1, an adhesion tester 1 according to this embodiment includes a support base 3 on a base 2 and two right and left columns 4a provided on the rear of the support base 3 in the figure. , 4b,
The rod 17 and the hammer 100 constituting the pendulum 16 supported so as to be swingable between the two columns 4a and 4b, and the support 3 for mounting the sample 200 at the lowest point of the pendulum 16 It has a schematic configuration including fixing members 8, 9 and the like provided before and after the illustration.

A support 3 integrally formed with the columns 4a and 4b is provided on the base 2, and a fixing position for fixing the sample is formed thereon as described later.
A movable table 5 which can be finely moved back and forth by a guide rod 10 in the figure and a fixed table 6 provided in the vicinity of the support are arranged thereon.

A rectangular fixing member mounting plate 7 is arranged between the two columns 4a and 4b, and is fixed to the moving table 5 and the fixing table 6 with screws. On the fixing member mounting plate 7, a rear fixing member 9 is mounted on the rear side in the figure and a front fixing member 8 is mounted on the front side in the figure. As shown in FIGS. 1 and 2, the rear fixing member 9 and the front fixing member 8 are provided. And a fixing position for sandwiching the sample body 200 on the fixing member mounting plate 7. After the sample body 200 is arranged at the fixing position, the fixing screws 8 a, 8 a provided on the side wall of the front fixing member 8 are formed. Into the screw hole in the wall surface of the front fixing member 8, and the fixing screw 8
The sample plate 200 is fixed by pressing a fixing plate 8b installed at the tip of the sample 8a, 8a against one side surface of the sample sample 200.

As shown in FIG. 1, the two columns 4a,
4b, there are provided a rod 17 and a hammer portion 100 constituting the pendulum 16 and a stopper 14 for holding the pendulum 16 in a state of being swung up by a predetermined angle.
The pendulum 16 is released from the locked state shown in FIG. 1 and is swung down rearward in the figure, and is provided with a scale plate 18 for measuring a swing angle after passing through the lowest point of the pendulum 16. I have.

A stopper rotating shaft 12 serving as a rotating shaft of the stopper 14 is provided at the uppermost portion between the columns 4a and 4b. The stopper rotation shaft 12 is rotatably attached to both the columns 4a and 4b, and one end of a stopper 14 is fixed to the center of the stopper rotation shaft 12. The other end of the stopper 14 is a hook 14
the hook 1 attached to the rod 17
7a. By operating the stopper lever 13 fixed to the stopper rotating shaft 12, the stopper rotating shaft 12 is rotated, so that the hook 14a of the stopper 14 and the hook 17a of the rod 17 can be released. Has become.

A shaft retainer 15b provided on the front surface of the right column 4b below the stopper rotating shaft 12 is provided together with a shaft retainer (not shown) provided on the left column 4a from the rod 17 and the hammer 100. A pendulum shaft 13 which is a rotation axis of the pendulum 16 is rotatably supported. The starting end of the rod 17 is fixed to the pendulum shaft 13,
A hook 17a for swinging the pendulum 16 to a predetermined height is provided at the center of the rod 17 by locking the hook 14a of the stopper 14 before measurement.
Is attached. Further, a hammer 100 is provided at the tip of the rod 17, and the hammer 10 is provided.
0, a quartz piezoelectric pressure sensor 107 described later
A lead wire 110 for transmitting an electric signal from the sensor to a voltage measuring device (not shown) is provided along the axis of the rod 17.

As shown in FIG. 3, the hammer 100 has a weight that occupies most of the weight of the hammer 100 in a mounting frame formed by two side plates 101, 101 and one upper plate 102. A hitting portion 104 that strikes the weight 103 and the sample body 200 at the lowest point of the pendulum 16 to strike and separate the bonding surface 204 of the sample body 200
And a piezoelectric quartz-type pressure sensor 107 for sensing the impact force of the impact as pressure.

The hitting portion 104 has a columnar shape having a spherical front portion, that is, a bullet shape.
It is arranged below the weight 103 so as to face the sample 200 when the pendulum 16 is swung up before the measurement. As will be described later, a portion of a quartz piezoelectric pressure sensor 107 integrally fixed to a rear portion of the hitting portion 104 is attached to the weight 103. In FIG. 3, 105
Is a guide member attached to the striking portion 104, and regulates the direction of impact applied to the striking portion 104 to a direction along the guide groove of the guide groove forming member 106 attached to the weight 103, that is, a trajectory direction of the pendulum 16. I have.

At the rear of the hitting portion 104, the quartz piezoelectric pressure sensor 107 is provided with a pressure sensor mounting bolt 109.
And a pressure sensor mounting member 1
08, it is fixed to the lower part of the weight 103 with a screw. The quartz piezoelectric pressure sensor 107 has two
It has a schematic configuration in which a plurality of electrodes are attached, and the hitting portion 104 receives mechanical strain due to the stress of the impact force applied to the sample 200, and generates a voltage by the strain. The lead wire 1 attached to the two electrodes
For example, by measuring this voltage with a voltage measuring device via 10, it is possible to know the impact force applied to the sample 200 by the hitting unit 104.

The left support 4a is provided with a scale plate 18, and one end of the pendulum shaft 13 is formed into a small diameter through the center of the scale plate 18. A push fitting 20 and a pointer 21 are attached to one end of the pendulum shaft 13 by a pointer retainer 19.
The pusher 20 is a wire whose tip is bent and serves as a hook, and its starting end is integrally fixed to the pendulum shaft 13 and moves in conjunction with the movement of the pendulum 16. The pointer 21 is set in a state of pointing vertically downward as shown in FIG.
When the pendulum 16 swings clockwise in the drawing and reaches the lowest point, the pendulum 16 is hooked on the hook of the push fitting 20 that moves in conjunction with the movement of the pendulum 16. Then, the pointer 21 moves integrally with the pendulum 16 as it is to the top dead center, and when the pendulum 16 reaches the top dead center, the hook of the push fitting 20 comes off and stops moving.

An adhesion test using the adhesion tester 1 configured as described above will be described below.

First, as shown in FIG. 1, the pendulum 16 is swung up front in the drawing, and the hook 14 of the stopper 14 is
By locking a to the hook 17a of the rod 17, the pendulum 16 is stopped in a state of being swung up to a predetermined angle.

First bonded member 2 molded into a block shape
01, the second member to be bonded 2 molded into a rectangular flat plate with a thickness of about the radius of the cylinder of the hitting portion 104
02 is bonded by means such as bonding with an adhesive or welding.
Next, a sample cover 203 was prepared by bending an edge of one side of a rectangular metal plate having a thickness about the radius of the cylinder of the hitting portion 104, and bending the bent edge of the sample cover 203 to the second position. The sample body 200 is joined by using an appropriate joining method in a state where the two adhered members 202 are in close contact with one side corner. The width of the bent edge portion of the sample cover 203 is substantially the same as the thickness of the second member to be bonded 202, but does not exceed it.

The bent edge of the sample cover 203 is arranged at the sample fixing position on the fixing member mounting plate 7 on which the sample body 200 is fixed on the support table 3, facing forward in the figure. The fixing screws 8a, 8 attached to the front fixing member 8 are sandwiched between the front and rear fixing members 8, 9.
a into the side wall of the front fixing member 8 and fix the fixing screw 8
a, 8a, the fixing plate 8b attached to the front
0 and fixed to one side.

As described above, after setting the pendulum 16 and the sample 200, the stopper lever 13 is pulled backward in the drawing to rotate the stopper shaft 12, and the hook 14a of the stopper 14 and the hook 17a of the rod 17 are locked. And swing down the pendulum 16. At the lowest point on the trajectory of the pendulum 16, the striking portion 1 of the hammer portion 100 of the pendulum 16
04 collides with the bent edge of the sample cover 203 joined to the second member to be bonded 202, and the sample 200
A shocking shear force is applied to the joint surface 204. This shearing force is transmitted substantially uniformly to the entire joining surface 204, and the second bonded member 202 is separated from the first bonded member 201 by the uniformly transmitted shearing force.

The quartz piezoelectric pressure sensor 107 integrally attached to the rear portion of the hitting portion 104 is
The sample 200 receives a stress of an impact force due to a collision with the sample 200 to generate a strain, and generates a voltage corresponding to the amount of the strain. By detecting this voltage with a voltage measuring device (not shown) or the like, the stress applied to the quartz-crystal piezoelectric pressure sensor 107, that is, the impact force applied to the sample 200 can be known.

After the collision with the sample 200, the pendulum 16
Is swung to the rear in the figure, and by measuring the swung angle at that time, the value of the energy required for the separation of the bonding surface 204 can also be obtained. This swing angle is indicated by a pointer 21 set to point vertically below before the measurement.

For example, from the pendulum shaft 13 to the hammer 100
Is the distance to the center of gravity of R (m), the hammer 1 of the pendulum 16
00 is W (kg), the swing-up angle of the pendulum 16 in the state of being locked by the stopper 14 is θ1 degree,
The support of the stopper 14 is released, and the impact portion 10
The maximum swing angle of the pendulum 16 after the collision of
If it is set to twice, the energy E (N / m ² ) lost by the pendulum 16 colliding with the sample 200 is given by the following equation. E = WR (cos θ1-cos θ2)

As described above, the sample 200 is placed on the support 3.
Is fixed, and the striking portion 104 of the pendulum 16 supported by the pendulum shaft 13 provided between the columns 4a and 4b collides with the sample 200 at the lowest point of the trajectory of the pendulum 16, and the impact force is reduced. The joining surface 204 of the sample 200 is peeled off by being applied in the joining shear direction. And, at that time, the striking unit 1
04 is measured by the quartz-crystal piezoelectric pressure sensor 107 attached to the rear of the striking section 104,
Adhesion test for impact force can be easily performed.

In the above-described embodiment, the sample 200 is fixed on the support 3. However, the present invention is not limited to this, and the present invention is not limited to this. 4b may be fixed. The sensor that senses the force is the quartz piezoelectric pressure sensor 107, but other types of sensors such as a piezoelectric pressure sensor that uses the piezoelectric effect of another substance or a pressure sensor that measures the displacement of a sensor member due to pressure may be used. Good. Although the hitting portion 104 has a bullet shape, it may have another shape, for example, a hemispherical shape. Further, the shape and the like of the pendulum 16 are also arbitrary, and it goes without saying that the specific detailed structure and the like can be appropriately changed.

<Experimental Example> A dynamic adhesion test by an impact force was performed using the adhesion tester 1 and compared with a conventionally known static adhesion test by applying a load. The two sample bodies used for comparison were prepared under the same conditions as possible, such as the shape, material, amount of adhesive used, bonding time, temperature during bonding, and pressure applied during bonding.

FIG. 4 shows the maximum stress (adhesion against dynamic force) in the dynamic adhesion test and the maximum stress (adhesion against static force) in the static adhesion test measured as described above. The relationship is shown.

The solid line shown in FIG. 4 shows the relationship between the maximum stress in the dynamic adhesion test and the maximum stress in the static adhesion test obtained by the least squares method from the point group shown in the figure. It is a curve. This curve is almost linear, and it can be seen that there is a certain correlation between the maximum stress in the dynamic adhesion test and the maximum stress in the static adhesion test. Using this curve, the maximum stress in the dynamic adhesion test and the maximum stress in the static adhesion test can be mutually converted and obtained.

As can be seen from the above experimental results, the adhesion test method according to the present invention is an alternative test method to the conventional static adhesion test method. Furthermore, since the adhesion is tested using the impact force by the pendulum 16, the conventional static adhesion test
The advantages are that the test can be performed in a short time, the configuration of the testing machine is simple, and the sample can be easily set.

[0037]

As described above, according to the adhesion test method according to the first aspect of the present invention, since an impact is applied from the shear direction of the joint surface of the sample body joined by adhesion or welding, the impact of the joint surface is reduced. The force due to the impact applied from the shearing direction is transmitted almost evenly to the joint surface, and peels the joint surface. Then, the impact force at that time is measured by a sensor that senses the force, so that the joining strength of the joining surface with respect to the impact force can be obtained. In addition, since the joint strength of the joint surface is measured by measuring the force due to impact, the measurement time is shorter than the conventional static adhesion test by applying a load, and the configuration of the testing machine required for measurement is reduced. The test can be simplified and performed with a simple operation.

According to the adhesion tester according to the second aspect of the present invention, the hammer section is swung up and the hammer section is shaken down, whereby the sample fixed on the support is bonded or welded. An impact is applied to the joint surface of the sample body from the shear direction of the joint surface, the joint surface is separated, and the impact force due to the impact at that time is measured by a sensor installed on the hammer unit, so that the joint force is measured. The joining strength with respect to the impact force of the surface can be determined. Also, since the impact force is measured by a sensor that senses the force and the joining strength of the joining surface is obtained, a power source is not required as compared with a conventional testing machine required for a static adhesion test by applying a load. Thus, it is possible to provide an adhesion tester that has a simple configuration, requires only a short measurement time, and can perform a test with a simple operation.

According to the adhesion tester according to the third aspect of the present invention, since the adhesion tester according to the second aspect is provided with a quartz-crystal piezoelectric pressure sensor, the effect of the second aspect can be obtained. That is, it is possible to reliably measure the bonding strength of the bonding surface with respect to the force impulsively applied to the bonding surface.

[Brief description of the drawings]

FIG. 1 is a perspective view of an adhesion tester as an example to which the present invention is applied.

FIG. 2 is an enlarged view of a portion A in FIG.

FIG. 3 is an enlarged view of a portion B in FIG. 1;

FIG. 4 shows the maximum stress (joinability to dynamic force) for a dynamic adhesion test obtained by the adhesion test method and the adhesion tester of the present invention, and the static adhesion method by load application and the adhesion tester. The graph which shows the relationship with the maximum stress (joint property with respect to a static force) with respect to the static adhesion test.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Adhesion tester 14 Stopper 16 Pendulum 17 Rod 100 Hammer part 104 Hitting part 107 Quartz crystal pressure sensor 200 Sample body 201 First member to be bonded 202 Second member to be bonded 203 Sample cover 204 Joint surface

Claims (3)

[Claims] An impact is applied to a joining surface joined by bonding or welding from a shearing direction along the joining surface, thereby sensing an impact force when peeling occurs on the joining surface. An adhesion test method characterized by measuring with a sensor. 2. A support base for fixing a sample body having a joint surface formed by bonding or welding, and a hammer unit for applying an impact to a vicinity of the joint surface of the sample body from a direction along the joint surface. And a sensor attached to the hammer section for sensing a force for measuring an impact force caused by the impact. 3. The adhesion tester according to claim 2, wherein the sensor for sensing the force is a quartz-crystal piezoelectric pressure sensor.