Angle-adjustable gravity curing tool for bonding strength sample and use method of angle-adjustable gravity curing tool

Abstract

The invention relates to the technical field of adhesive curing tools, and particularly discloses an angle-adjustable gravity curing tool for a bonding strength sample and a use method of the angle-adjustable gravity curing tool. Comprising a tool main body for coaxially stacking a sample rod and a mating plate along a first central axis; the tool main body is rotatably arranged on the tool main body; the adjusting assembly is used for driving the tool body to rotate so as to change the included angle between the first central axis and the gravity direction; according to the invention, the numerical value of the pressure borne by the bonding surface can be simply, conveniently and quickly obtained, the pressure borne by the bonding surface is visualized, and the numerical value of the pressure borne by the bonding surface is clearly defined; and the numerical value of the pressure of the gravity of the mating plate / sample rod on the bonding surface can be flexibly adjusted, so that the pressure borne by the bonding surface meets the pressure requirement in the adhesive curing process, and different pressure requirements of different adhesives in the curing process are met.

Description

Technical Field

[0001] The invention relates to the technical field of adhesive curing tooling, and in particular to an adjustable-angle gravity curing tooling for bonding strength specimens and a use method thereof. Background Art

[0002] Thermal spray coating is an emerging surface technology in recent years. It is often used for surface corrosion resistance and wear resistance. The bonding strength between the coating and the substrate is one of the important indicators to measure the quality of the coating.

[0003] In the current coating bonding strength test, the coating needs to be sprayed onto the sample rod first, and then the sample rod and the counterpart are bonded with glue. After the glue is cured, a tensile tester or a universal testing machine is used to perform a tensile test on the two.

[0004] In addition, during the curing process of the adhesive, a fixture is required to assist in fixing the sample rod and the mating part; it is necessary to ensure the coaxiality of the sample rod and the mating part, and to apply a certain pressure to the two to ensure the bonding strength of the adhesive.

[0005] For example, in Chinese patent CN202210278654.5, a cold spray coating combined with a strong sample bonding tool and a hot pressing curing method thereof are provided, including a base plate and a cover plate to ensure the concentricity of the sprayed sample and its counterpart when placed, a baffle plate arranged between the cover plate and the base plate, and also including several groups of springs and bolts that evenly apply force to the middle position on both sides of the sprayed sample and the unsprayed sample.

[0006] In this technical solution, a trapezoidal groove is provided to place the sprayed specimen and the counterpiece concentrically, the compression amount of the spring is controlled by adjusting the screw-in length of the bolt, and the pressing force required for the hot press curing test is calculated and controlled.

[0007] However, on the one hand, the sample rod and the mating part themselves have a certain mass, which will exert a certain pressure on the bonding surface of the two. Some adhesives require less pressure to solidify, and the gravity of the mating part / sample rod itself is even greater than the pressure required for the adhesive to solidify, which will cause the adhesive to be excessively squeezed out and reduce the bonding effect; on the other hand, the compression stroke of the spring is not easy to measure when the screw is used to compress the spring, and the spring itself will become loose as the use time increases, and the elastic modulus of the spring will decrease, which makes it impossible to intuitively quantify the numerical value of the pressure between the sample rod and the mating part.

[0008] It can be seen from this that how to adjust the numerical value of the pressure on the bonding surface caused by the gravity of the counterpiece / sample rod itself and how to obtain the numerical value of the pressure on the bonding surface intuitively and easily are issues that need to be solved urgently. Summary of the invention

[0009] In view of the above problems in the prior art, the present invention provides an adjustable angle gravity curing tooling for bonding strength specimens and a method of using the same, the purpose of which is to clearly define the numerical value of the pressure exerted on the bonding surface and flexibly adjust the pressure on the bonding surface.

[0010] In order to achieve the above-mentioned object of the invention, the technical solution adopted by the present invention is as follows:

[0011] On the one hand, there is provided an adjustable-angle gravity curing tooling for bonding strength specimens, comprising: a tooling body on which a specimen rod and a mating piece are coaxially stacked along a first center axis; a base on which the tooling body is rotatably disposed; and an adjustment assembly for driving the tooling body to rotate, thereby changing the angle between the first center axis and the direction of gravity.

[0012] Furthermore, the tooling also includes: a plurality of positioning grooves, which are parallel to the first central axis and are provided on the tooling body.

[0013] Furthermore, the positioning groove is a V-shaped groove or a trapezoidal groove.

[0014] Furthermore, the adjustment component includes: a positioning component, which is arranged on the base; an arc-shaped groove, which is opened on the positioning component with the rotation center of the tooling body as the center of the circle; a positioning screw, the threaded section of which passes through the arc-shaped groove and can be threadedly connected to the tooling body; the diameter of the nut of the positioning screw is larger than the width of the arc-shaped groove.

[0015] Furthermore, the adjustment component also includes: a scale, which is arranged on the positioning component and is located on one side of the arc groove, and is used to display the angle between the first central axis and the gravity direction.

[0016] Furthermore, the tooling also includes: a plurality of loading blocks of different masses, which can be stacked above the sample rod and the dual piece along the first central axis.

[0017] Furthermore, the tooling body includes: a vertically mounted bottom plate and side plates, the bottom plate is used to abut against the end surface of the sample rod / dual piece and provide support; the side plates are used to contact the side surfaces of the sample rod and the dual piece and provide positioning.

[0018] Furthermore, the tooling also includes: a plurality of glue overflow grooves, which are parallel to the first central axis and are provided on the tooling body, and can empty the surroundings of the bonding surface between the sample rod and the mating piece.

[0019] Furthermore, the tooling also includes: a limiting step, which is arranged on the base and can abut against the tooling body to limit the rotation stroke of the tooling body.

[0020] On the other hand, a method for using an adjustable-angle gravity curing tooling for bonding strength specimens is also provided, comprising the following steps: S1, cleaning the adhesive sheet, the specimen rod and the mating piece until the test requirements are met; S2, placing the adhesive sheet between the specimen rod and the mating piece, and coaxially stacking the three on the tooling body along the first center axis; S3, driving the tooling body to rotate by adjusting the assembly, changing the angle between the first center axis and the direction of gravity, until the pressure on the bonding surface meets the process requirements, and fixing the tooling body; S4, moving the tooling body into an oven, heating, keeping warm and air-cooling in the oven in turn to complete curing.

[0021] The beneficial effects of the present invention are as follows: in the present invention, by using the present invention, the numerical value of the pressure on the bonding surface can be obtained simply and quickly, the pressure on the bonding surface can be visualized, and the numerical value of the pressure on the bonding surface can be clearly defined; the numerical value of the pressure on the bonding surface caused by the gravity of the counterpiece / sample rod itself can also be flexibly adjusted, so that the pressure on the bonding surface meets the pressure requirements during the adhesive curing process and meets the different pressure requirements of different adhesives during the curing process; the adhesive can be prevented from being excessively squeezed out, thereby ensuring the bonding effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A schematic diagram of the overall structure of a tooling provided in an embodiment of the present invention.

[0023] Figure 2 A side view of a tool provided in an embodiment of the present invention.

[0024] Figure 3 A schematic diagram of gravity decomposition provided by an embodiment of the present invention.

[0025] Among them, 11, bottom plate; 12, side plate; 13, glue overflow groove; 2, base; 21, limit step; 31, positioning component; 32, arc groove; 33, positioning screw; 4, positioning groove; 5, loading block; 61, sample rod; 62, mating part; 63, adhesive sheet. DETAILED DESCRIPTION

[0026] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0027] Example 1

[0028] Reference Figure 1 and Figure 2As shown, an embodiment of the present invention provides an adjustable angle gravity curing tooling for bonding strength specimens, comprising: a tooling body, on which a specimen rod 61 and a mating piece 62 are coaxially stacked along a first central axis; a base 2, on which the tooling body is rotatably disposed; and an adjustment component, for driving the tooling body to rotate, thereby changing the angle between the first central axis and the direction of gravity.

[0029] Reference Figure 3 As shown, assuming that the angle between the first central axis and the direction of gravity is θ, the gravity of the dual member 62 / sample rod 61 itself is G, and the pressure requirement range during the adhesive curing process is F3; it can be seen that the gravity G is decomposed into: the force F1 along the first central axis and the force F2 perpendicular to the first central axis; wherein, F1 acts as the pressure of the bonding surface, applying pressure to the bonding surface, and F2 is offset by the load of the tooling body.

[0030] In this embodiment, when gravity G>F3, the adjustment component is used to drive the tooling body to rotate, so as to change the angle θ, decompose the gravity G, and adjust the size of F1 until F1 meets the pressure requirement interval F3.

[0031] In the present invention, the numerical value of the pressure F1 exerted on the bonding surface is converted into the trigonometric function relationship between the gravity G and the angle θ, that is, F1=G*cosθ, so that the numerical value of the pressure exerted on the bonding surface can be obtained simply and quickly, the pressure exerted on the bonding surface can be visualized, and the numerical value of the pressure exerted on the bonding surface can be clearly defined; by using the present invention, the numerical value of the pressure exerted on the bonding surface by the gravity of the dual member 62 / sample rod 61 itself can be flexibly adjusted, so that the pressure exerted on the bonding surface meets the pressure requirement during the curing process of the adhesive, and meets the different pressure requirements of different adhesives during the curing process; the adhesive can be prevented from being excessively squeezed out, thereby ensuring the bonding effect.

[0032] Preferably, the tooling further comprises: a plurality of loading blocks 5 of different masses, which can be stacked on top of the sample rod 61 and the dual piece 62 along the first central axis.

[0033] When the gravity G is less than F3, a loading block 5 is added above the sample rod 61 and the mating piece 62 to increase the size of F1, thereby ensuring that F1 meets the pressure requirement range F3 and ensuring the bonding effect.

[0034] Preferably, the tool further comprises: a plurality of positioning grooves 4, which are parallel to the first central axis and are provided on the tool body, and can complete the curing work of a plurality of sample rods 61 on the tool, thereby increasing the curing efficiency.

[0035] Specifically, the positioning groove 4 is a V-shaped groove or a trapezoidal groove, and the side surfaces of the mating piece 62 and the sample rod 61 can be placed on the inner wall surface of the positioning groove 4 so that the two can be coaxially positioned.

[0036] In this embodiment, the adjustment component includes: a positioning component 31, which is arranged on the base 2; an arc groove 32, which is opened on the positioning component 31 with the rotation center of the tooling body as the center of the circle; a positioning screw 33, the threaded section of which passes through the arc groove 32 and can be threadedly connected to the tooling body; the diameter of the nut of the positioning screw 33 is larger than the width of the arc groove 32.

[0037] Specifically, the base 2 is arranged horizontally, and the tooling body is hingedly mounted on the base 2 through the mounting axis. When it is necessary to adjust the value of the pressure exerted by the gravity of the counter-part 62 / sample rod 61 on the bonding surface, the staff manually moves the positioning screw 33 to slide in the arc groove 32, thereby changing the angle between the first central axis and the gravity direction, and completing the adjustment of the pressure on the bonding surface. Then, the positioning screw 33 is turned, and the positioning component 31 is tightened by the nut of the positioning screw 33 to complete the fixation of the tooling body.

[0038] The adjustment component also includes: a scale, which is arranged on the positioning component 31 and is located on one side of the arc groove 32, for displaying the angle between the first center axis and the direction of gravity; in the process of sliding the positioning screw 33 along the arc groove 32, the angle between the first center axis and the direction of gravity can be intuitively obtained by observing the corresponding value on the scale, and the entire adjustment process is convenient and quick.

[0039] In some embodiments, the adjustment component includes a motor, which drives the tooling body to rotate. The output shaft of the motor is installed concentrically with the rotation center of the tooling body, and the output shaft of the motor and the tooling body are connected by a coupling. In addition, the rotation angle of the output shaft of the motor is measured by an encoder / Hall sensor, and the electrical signal is converted into an electrical signal and transmitted to an electronic screen for the staff to directly observe the angle between the first center axis and the direction of gravity.

[0040] Specifically, the tooling body includes: a vertically installed bottom plate 11 and side plates 12, the bottom plate 11 is used to abut the end surface of the sample rod 61 / the mating piece 62 and provide support; the side plates 12 are used to contact the sides of the sample rod 61 and the mating piece 62 and provide positioning.

[0041] In this embodiment, the positioning groove 4 is opened on the side plate 12, and the sample rod 61 and the mating part 62 are coaxially positioned by the positioning groove 4 of the side plate 12; under the action of gravity, one end face of the sample rod 61 / the mating part 62 abuts against the bottom plate 11, and the sample rod 61 and the mating part 62 are supported by the bottom plate 11.

[0042] In the present invention, along the first central axis direction, one end of the sample rod 61 / the mating piece 62 away from the bottom plate 11 is in an open state, which can be applicable to the curing operation of sample rods 61 and mating pieces 62 of different lengths.

[0043] Moreover, along the radial direction, one side of the sample rod 61 and the mating part 62 is also in an open state; during the curing process, no additional pressure is applied to the sample rod 61 and the mating part 62 in the direction of the first central axis and the radial direction; the mechanical intervention on the sample rod 61 and the mating part 62 is reduced, and during the melting of the adhesive sheet 63, the sample rod 61 and the mating part 62 can be moved and fine-tuned along the radial direction, and the coaxiality can be adaptively adjusted.

[0044] Specifically, the tooling also includes: a plurality of glue overflow grooves 13, which are parallel to the first central axis and are opened on the tooling body, and can empty the surroundings of the bonding surface between the sample rod 61 and the mating piece 62 to prevent the squeezed glue from bonding to the tooling body.

[0045] Inevitably, during the process of the adhesive sheet 63 being heated and melted, a certain amount of adhesive will be squeezed out from between the extrusion sample rod 61 and the mating part 62, and the overall length of the sample rod 61, the adhesive sheet 63 and the mating part 62 will be slightly shortened; if pressure is applied to both ends of the sample rod 61 and the mating part 62 by springs and screws, the pressure received by the bonding surface will change during the curing process; in the present invention, pressure is applied to the bonding surface by the gravity of the sample rod 61 / mating part 62 itself, and the pressure is stable and unchanged, which can ensure the stability of the curing process.

[0046] Specifically, the tooling also includes: a limiting step 21, which is arranged on the base 2 and can abut against the tooling body to limit the rotation stroke of the tooling body; in this embodiment, two limiting steps 21 are arranged on the base 2, respectively located on both sides of the tooling body, and can respectively abut against the side plate 12 and the bottom plate 11, thereby limiting the angle between the first center axis and the gravity direction to 0 to 90°.

[0047] Example 2

[0048] An embodiment of the present invention provides a method for using an adjustable angle gravity curing tool for bonding strength specimens, comprising the following steps:

[0049] S1. Clean the adhesive sheet 63, the sample rod 61 and the dual part 62 until they meet the test requirements; grind the end face of the coated sample rod 61 with sandpaper of 220 mesh or above to remove excess coating; sandblast the end face of the uncoated dual part 62, and the surface roughness after sandblasting should be greater than Ra 2.03; clean the polished sample rod 61 and the dual part 62 after sandblasting with alcohol, and blow dry them with compressed air; take out the low-temperature stored adhesive sheet 63 (in this embodiment, EA 9658AERO adhesive is selected) 10 minutes in advance and wait for the water vapor to evaporate.

[0050] S2. Place the adhesive sheet 63 between the sample rod 61 and the mating piece 62, and coaxially stack the three on the tooling body along the first center axis; first place the sample rod 61 on the tooling body along the first center axis, then tear off one side of the anti-sticking film on both sides of the adhesive sheet 63 and adhere it to the sandblasted surface of the mating piece 62, and tear off the anti-sticking film on the other side to expose the adhesive; finally, move the mating piece 62 close to the sample rod 61 along the first center axis until one side of the adhesive sheet 63 adheres to the sample rod 61.

[0051] S3. Drive the tooling body to rotate by adjusting the assembly to change the angle between the first central axis and the gravity direction until the pressure on the bonding surface meets the process requirements, and fix the tooling body.

[0052] S4. Move the tooling body into the oven, heat up, keep warm and air-cool in the oven in sequence to complete the curing. It is necessary to keep warm at 180°C to 190°C for 2 hours, and then air-cool to 40°C in the oven. Then, the sample rod 61 can be removed to complete the curing operation.

[0053] Preferably, a gravity load may be added above the sample rod 61 and the mating piece 62 to ensure that the pressure requirement of the bonding surface during the curing process is met.

[0054] It should be understood by those skilled in the art that, although preferred embodiments of the present invention have been described, additional changes and modifications may be made to these embodiments once those skilled in the art are aware of the basic inventive concepts. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention. Obviously, those skilled in the art may make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and the equivalent technology, the present invention is also intended to include these modifications and variations.

Claims

1. An adjustable angle gravity curing tool for bonding strength specimens, characterized in that: include: A tooling body for coaxially stacking the sample rod (61) and the mating piece (62) along a first central axis; A base (2), on which the tool body is rotatably arranged; The adjusting component is used to drive the tooling body to rotate, so as to change the angle between the first central axis and the gravity direction.

2. The adjustable angle gravity curing tool for bonding strength test specimens according to claim 1, characterized in that: Also includes: A plurality of positioning grooves (4) are parallel to the first central axis and are arranged on the tooling body.

3. The adjustable angle gravity curing tool for bonding strength test specimens according to claim 2, characterized in that: The positioning groove (4) is a V-shaped groove or a trapezoidal groove.

4. The adjustable angle gravity curing tool for bonding strength test specimens according to claim 1, characterized in that: The adjustment components include: A positioning component (31) is arranged on the base (2); An arc-shaped groove (32) is formed on the positioning component (31) with the rotation center of the tooling body as the center of the circle; A positioning screw (33) has a threaded section that passes through the arc-shaped groove (32) and can be threadedly connected to the tooling body; and a nut of the positioning screw (33) has a diameter that is greater than a width of the arc-shaped groove (32).

5. The adjustable angle gravity curing tool for bonding strength test specimens according to claim 4, characterized in that: The adjustment component also includes: a scale, which is arranged on the positioning component (31) and is located on one side of the arc-shaped groove (32) and is used to display the size of the angle between the first central axis and the gravity direction.

6. The adjustable angle gravity curing tool for bonding strength test specimens according to claim 1, characterized in that: Also includes: A plurality of loading blocks (5) with different masses can be stacked above the sample rod (61) and the counterpart (62) along the first central axis.

7. The adjustable angle gravity curing tool for bonding strength test specimens according to claim 1, characterized in that: The tooling body comprises: a vertically mounted bottom plate (11) and side plates (12); the bottom plate (11) is used to abut against the end surface of the sample rod (61) / the mating piece (62) and provide support; the side plates (12) are used to contact the sides of the sample rod (61) and the mating piece (62) and provide positioning.

8. The adjustable angle gravity curing tool for bonding strength test specimens according to claim 1, characterized in that: Also includes: A plurality of overflow glue grooves (13) are parallel to the first central axis and are provided on the tooling body, and can empty the surroundings of the bonding surface between the sample rod (61) and the mating piece (62).

9. The adjustable angle gravity curing tool for bonding strength test specimens according to claim 1, characterized in that: Also includes: The limiting step (21) is arranged on the base (2) and can abut against the tooling body to limit the rotational travel of the tooling body.

10. A method for using the adjustable angle gravity curing tooling for bonding strength specimens according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1. Clean the adhesive sheet (63), the sample rod (61) and the mating piece (62) until they meet the test requirements; S2, placing the adhesive sheet (63) between the sample rod (61) and the mating piece (62), and coaxially stacking the three on the tooling body along the first central axis; S3, driving the tooling body to rotate by adjusting the assembly, changing the angle between the first central axis and the gravity direction, until the pressure on the bonding surface meets the process requirements, and fixing the tooling body; S4. Move the tooling body into the oven, and heat up, keep warm, and air-cool with the oven in sequence to complete the curing.

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