A positioning tool for fixing the thickness of a glue layer

Abstract

The utility model relates to a kind of positioning tool for fixing glue layer thickness, comprising: positioning base, compression block, positioning base is provided with recess for placing single lap test piece, compression block is mechanically connected with positioning base and can compress single lap test piece, compression block is provided with protruding compression part, compression part can be placed in recess and with the shape of recess is adapted to be used to realize the compression fixation of single lap test piece bonding site, adjusting pad is set between compression block and positioning base.The utility model design is reasonable, simple structure, and adjusting and replacing are convenient and fast, the glue layer thickness control problem of a variety of specifications of single lap test piece in bonding process is solved by replacing adjusting pad of different specifications, reduces tool type, and good universality reduces use cost, can adapt to test piece of multiple thickness specifications.

Description

Technical Field

[0001] This utility model belongs to the field of adhesive technology and relates to a positioning fixture for fixing the thickness of an adhesive layer. Background Technology

[0002] In manufacturing fields such as automobile manufacturing and aerospace, structural adhesives are often used, and their thickness affects the bonding strength. Currently, there is a lack of effective methods to fix the thickness of the adhesive layer. In laboratory tests of structural adhesive bonding, it is often necessary to control the thickness of the structural adhesive. However, the traditional method of controlling the thickness of the adhesive layer uses glass microspheres, which has the problems of difficulty in controlling the number of glass microspheres and easy crushing during the bonding process. Therefore, a positioning fixture for fixing the thickness of the adhesive layer is needed to solve the above problems. Utility Model Content

[0003] The purpose of this utility model is to provide a positioning fixture for fixing the thickness of the adhesive layer. By adjusting and replacing the adjusting pads of different specifications, it can adapt to the pressing of single-lap joint test pieces of various specifications during bonding. The adhesive layer thickness is precisely controlled, the adjustment is convenient, and the versatility is strong, which can meet the various bonding test needs of users.

[0004] To achieve the above objectives, embodiments of this utility model provide a positioning fixture for fixing the thickness of an adhesive layer, comprising: a positioning base and a clamping block. The positioning base is provided with a groove for placing a single overlapping test piece. The clamping block is mechanically connected to the positioning base and can clamp the single overlapping test piece. The clamping block is provided with a downwardly protruding clamping part, which can be placed in the groove and is adapted to the shape of the groove to achieve clamping and fixing of the bonding part of the single overlapping test piece.

[0005] Furthermore, it also includes an adjusting pad, which is disposed between the clamping block and the positioning base and is detachably mechanically connected to the clamping block and the positioning base respectively to realize the vertical height adjustment of the clamping block to adapt to the clamping and fixing of single overlapping test pieces of different specifications.

[0006] Furthermore, the positioning base is also provided with a chamfered portion, which is located at the top corner of the groove to facilitate the placement and removal of the single-overlap test piece.

[0007] Furthermore, the width of the pressing part is adapted to the width of the bonding surface of the single overlapping test piece.

[0008] This utility model relates to a positioning fixture for fixing the thickness of an adhesive layer. The beneficial effects are as follows: The positioning fixture for fixing the thickness of an adhesive layer provided by the embodiments of this utility model is reasonably designed, has a simple structure, and is convenient and quick to adjust and replace. By replacing the adjustment pads of different specifications, it solves the problem of controlling the thickness of the adhesive layer during the bonding process of single-lap joint test pieces of various specifications. It reduces the types of fixtures, has good versatility, reduces the cost of use, and can adapt to test pieces of various thicknesses, meeting the fixture positioning needs of users for bonding various single-lap joint test pieces. Attached Figure Description

[0009] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings of the embodiments will be briefly introduced below. Obviously, the drawings described below only involve some embodiments of this utility model, and are not intended to limit this utility model.

[0010] Figure 1 A three-dimensional structural diagram of a positioning fixture for fixing the thickness of an adhesive layer provided in an embodiment of this utility model;

[0011] Figure 2 Another three-dimensional structural schematic diagram of the positioning fixture for fixing the thickness of the adhesive layer provided in this embodiment of the utility model;

[0012] Figure 3 A top view of a positioning fixture for fixing the thickness of an adhesive layer provided in an embodiment of this utility model;

[0013] Figure 4 An exploded three-dimensional structural diagram of a positioning fixture for fixing the thickness of an adhesive layer, provided in an embodiment of this utility model.

[0014] Figure 5 A top view of a single-overlap test piece of a positioning fixture for fixing the thickness of an adhesive layer, provided in an embodiment of this utility model.

[0015] Figure 6 A three-dimensional structural diagram of a single-lapped test piece provided in an embodiment of this utility model.

[0016] In the picture:

[0017] 1. Positioning base; 11. Groove; 12. Chamfered part; 2. Pressing block; 21. Pressing part; 3. Adjusting pad; 4. Single overlap test piece. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the described embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0019] Unless otherwise defined, the technical or scientific terms used in this disclosure should have the ordinary meaning understood by one of ordinary skill in the art to which this disclosure pertains. It should be noted that terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," "front," and "rear," indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are used only for the convenience of describing the present invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. Furthermore, terms such as "first," "second," "third," and "fourth," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0020] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0021] The following is a detailed description of a positioning fixture for fixing the thickness of an adhesive layer provided by an embodiment of the present invention, with reference to the accompanying drawings.

[0022] Example

[0023] Figure 1 This diagram shows a three-dimensional structure of a positioning fixture for fixing the thickness of an adhesive layer provided in an embodiment of the present invention. Figure 2 This illustration shows another three-dimensional structural diagram of the positioning fixture for fixing the thickness of the adhesive layer provided in an embodiment of the present invention; Figure 3 A top view of the positioning fixture for fixing the thickness of the adhesive layer provided in an embodiment of the present invention is shown; Figure 4 This diagram shows an exploded three-dimensional view of the positioning fixture for fixing the thickness of the adhesive layer provided in an embodiment of the present invention. Figure 5This shows a top view of a positioning fixture with a single-overlap test piece for fixing the adhesive layer thickness provided in an embodiment of the present invention. Figure 6 A three-dimensional structural diagram of a single-lapped specimen provided in an embodiment of this utility model is shown. Figures 1 to 6 As shown, the positioning fixture for fixing the adhesive layer thickness provided in this embodiment of the present invention is suitable for bonding tests of single-lapped test pieces 4 of various specifications, so as to test the bonding effect of test pieces of different specifications with different adhesive materials. The positioning fixture for fixing the adhesive layer thickness provided in this embodiment of the present invention includes: a positioning base 1 and a clamping block 2. The positioning base 1 is provided with a groove 11 for placing the single-lapped test piece 4. Generally, the groove 11 is set in a rectangle to facilitate the accommodation of rectangular single-lapped test pieces 4. At the same time, the depth of the groove 11 is adapted to the height of the single-lapped test piece 4. The clamping block 2 is mechanically connected to the positioning base 1 and can clamp the single-lapped test piece 4. Specifically, the clamping block 2 is provided with a downwardly protruding clamping part 21. The clamping block 2 is located on one side of the groove 11. The clamping part 21 can be placed in the groove 11 and is adapted to the shape of the groove 11 to achieve clamping and fixing of the bonding part of the single overlapping test piece 4. Here, the width of the clamping part 21 is adapted to the width of the joint surface of the bonding part of the single overlapping test piece 4. Generally speaking, the width of the clamping part 21 should be greater than or equal to the width of the joint surface of the bonding part of the single overlapping test piece 4 (that is, the overlapping position of the two test pieces in the single overlapping test piece 4). At the same time, the contact surface between the lower end of the clamping part 21 and the single overlapping test piece 4 must be flat so that the single overlapping test piece 4 is evenly subjected to the clamping force generated by the clamping block 2.

[0024] The positioning fixture for fixing the adhesive layer thickness provided in this embodiment of the utility model further includes an adjusting pad 3 as a design improvement. The adjusting pad 3 is disposed between the clamping block 2 and the positioning base 1 and is detachably mechanically connected to the clamping block 2 and the positioning base 1 respectively to realize the vertical height adjustment of the clamping block 2 to adapt to the clamping and fixing of single overlapping test pieces 4 of different specifications. The single overlapping test piece 4 is placed in the cavity position formed by the clamping part 21 and the groove 11. The adjusting pad 3 can be set to various thickness specifications. By replacing the adjusting pad 3 of different specifications, it can adapt to the bonding experiment of single overlapping test pieces 4 of different specifications and different adhesive layer thicknesses. In the actual bonding process, in order to ensure that the structural adhesive can cover the entire overlapping joint surface, a large amount of adhesive is often applied and then squeezed out. The adhesive layer thickness is precisely controlled, avoiding the problem that the number of glass microspheres is not easy to control and the phenomenon that glass microspheres are easily crushed in the previous bonding process, which leads to the problem that the adhesive layer is not easy to control. The adjustment pad 3 is easy to disassemble, install, and replace. It can be done by removing the connecting screws or bolts on the clamping block 2, thereby enhancing the adaptability and versatility of the positioning fixture, reducing the types of positioning fixtures, and saving costs.

[0025] In the positioning fixture for fixing the thickness of the adhesive layer provided in this embodiment of the utility model, as a further design improvement, the positioning base 1 is also provided with a chamfered part 12. The chamfered part 12 is located at the top corner of the groove 11 to facilitate the placement and removal of the single overlapping test piece 4. This effectively avoids the disadvantage that it is inconvenient to place and remove the single overlapping test piece 4 due to the small gap between it and the positioning base 1. At the same time, it can also reduce the influence of the chamfering caused by the rounded corner of the machining tool at the top corner of the groove 11, making the positioning more accurate and the placement and removal quick and convenient.

[0026] Compared with the prior art, the positioning fixture for fixing the adhesive layer thickness provided in this utility model embodiment is reasonably designed, simple in structure, and convenient and quick to adjust and replace. By replacing the adjustment pads 3 of different specifications, it solves the problem of adhesive layer thickness control during the bonding process of single-lapped test pieces 4 of various specifications. It reduces the types of fixtures, has good versatility, reduces the cost of use, and can adapt to test pieces of various thicknesses, meeting the fixture positioning needs of users for bonding various single-lapped test pieces 4.

[0027] The following points need to be explained:

[0028] (1) Unless otherwise defined, the same reference numerals in the embodiments of this utility model and the accompanying drawings have the same meaning.

[0029] (2) The accompanying drawings of this utility model embodiment only involve the structure involved in this utility model embodiment. Other structures can refer to the general design.

[0030] (3) For clarity, some structures in the drawings used to describe embodiments of the present invention may be enlarged or reduced, that is, these drawings are not drawn to actual scale.

[0031] (4) Where there is no conflict, the embodiments of this utility model and the features in the embodiments can be combined with each other to obtain new embodiments.

[0032] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A positioning fixture for fixing the thickness of an adhesive layer, characterized in that, include: The positioning base (1) and the clamping block (2) are provided. The positioning base (1) is provided with a groove (11) for placing a single overlapping test piece (4). The clamping block (2) is mechanically connected to the positioning base (1) and can clamp the single overlapping test piece (4). The clamping block (2) is provided with a downward protruding clamping part (21). The clamping part (21) can be placed in the groove (11) and is adapted to the shape of the groove (11) to achieve clamping and fixing of the bonding part of the single overlapping test piece (4).

2. The positioning fixture for fixing the thickness of the adhesive layer according to claim 1, characterized in that, It also includes an adjustment pad (3), which is disposed between the clamping block (2) and the positioning base (1) and is detachably mechanically connected to the clamping block (2) and the positioning base (1) respectively to realize the vertical height adjustment of the clamping block (2) to adapt to the clamping and fixing of the single overlapping test piece (4) of different specifications.

3. The positioning fixture for fixing the thickness of the adhesive layer according to claim 1, characterized in that, The positioning base (1) is also provided with a chamfered part (12), which is located at the top corner of the groove (11) to facilitate the placement and removal of the single overlapping test piece (4).

4. The positioning fixture for fixing the thickness of the adhesive layer according to claim 1, characterized in that, The width of the pressing part (21) is adapted to the width of the bonding surface of the single overlapping test piece (4).

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