Fixture for testing shear strength of adhesive of terracotta warrior in Qinxi

Abstract

The utility model discloses a fixture for testing the shear strength of the adhesive of Qin terracotta warrior, which comprises a first supporting seat, a second supporting seat and a base, the first supporting seat and the second supporting seat are arranged on the base, and an installation distance for a terracotta warrior test piece is reserved between the first supporting seat and the second supporting seat. The adjacent surfaces of the first supporting seat and the second supporting seat are respectively provided with a supporting part for supporting the side surface of the terracotta army test piece, and each supporting part is provided with a movable part; after the terracotta army test piece is clamped by the first supporting seat and the second supporting seat, the movable part can synchronously move along with the movement of the section of the terracotta army test piece. By using the device, the friction force on the side surface of the terracotta warrior testpiece can be greatly reduced, so that the test result is more accurate.

Description

Technical Field

[0001] The utility model belongs to the technical field of terracotta warrior restoration, and in particular relates to a clamp for testing the shear strength of an adhesive for Qin terracotta warriors. Background Art

[0002] When the Qin Terracotta Warriors were unearthed, some fragments appeared, causing the ceramic Terracotta Warriors to be incomplete. Therefore, the restoration of the Terracotta Warriors has become an important task, and adhesives are the key materials for repairing fragments. The tensile, shear and aging properties of adhesives are the three major technical indicators for evaluating the performance of adhesives. The shear strength performance test of adhesives requires the preparation of special specimens, which are then bonded together with adhesives to test their shear strength. When testing the shear strength, it is necessary to ensure that the pressure direction is parallel to the bonding surface and no bending moment is generated. The existing technology for testing the shear strength of adhesives is to use adhesives to bond large-size specimens, and the lateral pressure ensures the stability of the specimens. The disadvantage of this method is that the lateral pressure of the specimens causes friction on the sides of the specimens, and the shear strength of the test will be too high, which cannot characterize the shear strength of the adhesive between the ceramic Terracotta Warriors fragments. Summary of the invention

[0003] In order to solve the problems existing in the prior art, the purpose of the utility model is to provide a clamp for testing the shear strength of the adhesive of the Qin Terracotta Warriors and Horses. When using the utility model, the friction force on the side of the Terracotta Warriors and Horses specimen can be greatly reduced, making the test result more accurate.

[0004] The technical solution adopted by the utility model is as follows:

[0005] A fixture for testing the shear strength of Qin Terracotta Warriors and Horses adhesive, comprising a first support seat, a second support seat and a base, wherein the first support seat and the second support seat are mounted on the base, a distance for mounting a Terracotta Warriors and Horses specimen is reserved between the first support seat and the second support seat, and adjacent surfaces of the first support seat and the second support seat are both provided with support components for supporting the side surfaces of the Terracotta Warriors and Horses specimen, wherein the support components are provided with movable components;

[0006] After the first supporting seat and the second supporting seat clamp the Terracotta Warriors and Horses specimen, the movable component can move synchronously with the movement of the cross section of the Terracotta Warriors and Horses specimen.

[0007] Preferably, the base is provided with sliding grooves at the positions where the first support seat and the second support seat are installed, and the first support seat and the second support seat are both embedded in the sliding grooves. By adjusting the positions of the first support seat and the second support seat in the sliding grooves, the distance between the adjacent surfaces of the first support seat and the second support seat can be adjusted, and the first support seat and the base as well as the second support seat and the base are connected by a fixing device.

[0008] Preferably, the fixing device is a bolt.

[0009] Preferably, the bottoms of the first support seat and the second support seat are both provided with through holes for the bolts to pass through, and the bottom of the slide groove on the base is provided with long holes for the bolts to pass through, and the long holes are arranged along the length direction of the slide groove.

[0010] Preferably, there is a clearance fit between the first support seat and the slide groove, and there is a clearance fit between the second support seat and the slide groove.

[0011] Preferably, the supporting component adopts a roller device, which includes a roller bracket and a plurality of rollers installed on the roller bracket, the roller bracket is installed on the first supporting seat and the second supporting seat, and a plurality of rollers are arranged on the roller bracket at intervals, the plurality of rollers form a roller path and serve as the movable component, and the plurality of rollers are used to support the side of the Terracotta Warriors specimen.

[0012] Preferably, a belt is wound around the plurality of rollers, and the belt is in a tensioned state.

[0013] Preferably, the roller support is detachably connected to the first support seat and the second support seat by bolts.

[0014] Preferably, the holes on the first support seat and the second support seat for the bolts to pass through are configured as long holes, and the length direction of the long holes is perpendicular to the axis of the roller shaft.

[0015] Preferably, the first support seat and the second support seat have the same structure, and both adopt L-shaped supports, the two sides of the L-shaped support are perpendicular to each other, and a reinforcing rib plate is connected between the two sides.

[0016] The utility model has the following beneficial effects:

[0017] In the utility model, the side of the Terracotta Warriors specimen can be clamped by the first support seat and the second support seat. Since support components for supporting the side of the Terracotta Warriors specimen are arranged on the adjacent surfaces of the first support seat and the second support seat, and the support components are provided with movable components, the movable components can move synchronously with the movement of the cross-section of the Terracotta Warriors specimen. Therefore, when a press is used for testing, a force is applied to the Terracotta Warriors specimen in the longitudinal direction through the upper pressing plate of the press, so that the Terracotta Warriors specimen on the upper side has a tendency to move downward. At this time, there is no friction between the movable components in contact with the upper specimen, so that the test result is more accurate, and the bottom of the lower specimen will directly hit the surface of the base, and the longitudinal limitation of the lower specimen is achieved through the base. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a longitudinal section view of the utility model in use state;

[0019] Figure 2 for Figure 1 Schematic diagram of the middle AA section;

[0020] Figure 3 It is a schematic diagram of the base in the embodiment of the utility model;

[0021] Figure 4 It is a schematic structural diagram of the first support base and the second support base in an embodiment of the utility model.

[0022] In the figure, 1-first support seat, 2-second support seat, 3-base, 4-first roller device, 5-second roller device, 6-roller, 7-first test piece, 8-second test piece, 9-pressing plate, 10-adhesive, 11-slide, 12-roller bracket, 13-long hole, 14-reinforcement rib plate, 15-L-shaped support. DETAILED DESCRIPTION

[0023] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0024] like Figure 1 and Figure 2 As shown, the utility model is a clamp for testing the shear strength of the adhesive of the Terracotta Warriors and Horses of Qin Dynasty, comprising a first support seat 1, a second support seat 2 and a base 3, the first support seat 1 and the second support seat 2 are installed on the base 3, an installation distance for the Terracotta Warriors and Horses specimen is reserved between the first support seat 1 and the second support seat 2, adjacent surfaces of the first support seat 1 and the second support seat 2 are provided with support components for supporting the side of the Terracotta Warriors and Horses specimen, and the support components are provided with movable components; after the first support seat 1 and the second support seat 2 clamp the Terracotta Warriors and Horses specimen, the movable components can move synchronously with the movement of the cross section of the Terracotta Warriors and Horses specimen.

[0025] The above-mentioned Terracotta Warriors and Horses specimens include two specimens, which are respectively denoted as the first specimen 7 and the second specimen 8. Figure 1 Taking the orientation shown as an example, the right side of the first test piece 7 and the left side of the second test piece 8 are bonded together with adhesive 10, and the whole is in a straight Z shape.

[0026] When the fixture for testing the shear strength of the adhesive of the Qin Terracotta Warriors and Horses is used, the above-mentioned Terracotta Warriors and Horses specimen is inserted from top to bottom into the space between the first support seat 1 and the second support seat 2, so that the lower end of the second specimen 8 is abutted against the upper surface of the base 3; at the same time, the movable component on the first support seat 1 contacts the left side of the first specimen 7, and the movable component on the second support seat 2 contacts the right side of the second specimen 8, and then the assembled overall structure is placed on the work table of the press, and then the upper pressing plate 9 of the press is adjusted to move downward and contact the surface of the first specimen 7, and then force is continuously and stably applied to test the shear strength of the adhesive of the Qin Terracotta Warriors and Horses.

[0027] As a preferred scheme of the above-mentioned scheme of the utility model, a slide groove 11 is provided on the base 3 of the utility model at the position where the first support seat 1 and the second support seat 2 are installed, and the first support seat 1 and the second support seat 2 are both embedded in the slide groove 11. By adjusting the position of the first support seat 1 and the second support seat 2 in the slide groove 11, the spacing between the adjacent surfaces of the first support seat 1 and the second support seat 2 can be adjusted, so that it can adapt to the testing of Terracotta Warriors and Horses specimens of different thicknesses. At the same time, the slide groove 11 ensures the accuracy of the position of the first support seat 1 and the second support seat 2 on the base 3, and the parallelism between the adjacent surfaces of the first support seat 1 and the second support seat 2. The first support seat 1 and the base 3, as well as the second support seat 2 and the base 3, are connected by a fixing device. When the Terracotta Warriors and Horses specimen is placed between the first support seat 1 and the second support seat 2, the first support seat 1 and the second support seat 2 are fixed to the base 3 by the fixing device. This can prevent the Terracotta Warriors and Horses specimen from tilting during the experiment, thereby ensuring the accuracy of the experimental results.

[0028] As an optional solution mentioned above, the fixing device adopts bolts, which has a simple and reliable structure and is easy to operate. By tightening or loosening the bolts, the first support seat 1 and the second support seat 2 can be tightened or loosened.

[0029] As an optional solution, the bottoms of the first support seat 1 and the second support seat 2 are both provided with through holes for bolts to pass through, see Figure 3 The base 3 is provided with a long hole 13 at the bottom of the slide slot 11 for the bolt to pass through, and the long hole 13 is arranged along the length direction of the slide slot 11. Figure 3 The base 3 shown is Figure 1 The base 3 is arranged in the same orientation, that is, the length direction of the long hole 13 and the length direction of the slide groove 11 are the left and right directions, so that the first support seat 1 and the second support seat 2 can be adjusted left and right.

[0030] As an optional solution, the first support seat 1 and the slide groove 11 are clearance-fitted, and the second support seat 2 and the slide groove 11 are clearance-fitted. This structural design can ensure the accuracy of the positions of the first support seat 1 and the second support seat 2 on the base 3, and facilitates the adjustment of their relative positions.

[0031] As an alternative to the above, see Figure 1 and Figure 2The supporting component of the utility model adopts a roller device, which includes a roller support 12 and a plurality of rollers 6 mounted on the roller support 12. The roller support 12 is mounted on the first support seat 1 and the second support seat 2. A plurality of rollers 6 are arranged at intervals on the roller support 12. The plurality of rollers 6 form a roller track and serve as the movable component. The plurality of rollers 6 are used to support the side of the Terracotta Warriors specimen. After clamping the Terracotta Warriors specimen, the roller 6 can rotate synchronously with the up and down movement of the first specimen 7 and the second specimen 8, so that the first specimen 7 and the second specimen 8 can be prevented from being subjected to friction in the up and down directions, and only subjected to rolling friction interacting with the roller 6. The rolling friction will not affect the measurement of the shear strength of the adhesive.

[0032] As a further improvement of the above scheme, the utility model can also be provided with a belt around the plurality of rollers 6, and the belt is in a tensioned state. After the belt is provided, the side surfaces of the first test piece 7 and the second test piece 8 are in surface contact with the belt, so that the indentation caused by the curvature of the surface of the roller 6 can be avoided as much as possible, and the upward or downward resultant force generated by the direct contact between the roller 6 and the surface of the Terracotta Warriors and Horses test piece can be avoided as much as possible. The resultant force can affect the accuracy of the shear strength measurement of the adhesive.

[0033] As an optional solution of the present invention, the roller bracket 12 is detachably connected to the first support seat 1 and the second support seat 2 by bolts, which facilitates the replacement of support components of different specifications to adapt to Terracotta Warriors specimens of different sizes (including height (dimensions in the up and down directions) and width (dimensions perpendicular to the paper surface)).

[0034] As a further improvement of the above scheme, the holes for the bolts to pass through on the first support seat 1 and the second support seat 2 are set as long holes, and the length direction of the long hole is perpendicular to the axis of the roller shaft 6, that is, the length direction of the long hole is the up and down direction. Through the above structure, the up and down positions of the roller shaft brackets 12 on the first support seat 1 and the second support seat 2 can be easily adjusted to adapt to the measurement of Terracotta Warriors and Horses specimens of different heights.

[0035] As an alternative to the above, see Figure 1 and Figure 4 The first support seat 1 and the second support seat 2 have the same structure, both of which are L-shaped supports, the two sides of the L-shaped support are perpendicular to each other, and a reinforcing rib plate 14 is connected between the two sides. The support seat structure of this structure is simple, and the reinforcing rib plate 14 plays a role in strengthening the rigidity, effectively reducing the deformation between the two sides of the L-shaped support, which is conducive to ensuring the accuracy of the shear strength of the Qin Terracotta Warriors and Horses adhesive.

[0036] As the preferred solution mentioned above, when measuring, when the upper pressing plate of the press approaches the upper end surface of the first specimen 7, in order to prevent the tilting caused by the unevenness of the upper end surface of the first specimen 7 and the lower end surface of the second specimen 8, a shear test can be carried out after a rubber pad is placed on the top of the first specimen 7.

[0037] It can be seen from the above scheme that the technical advantage of the utility model is that the bonding surface of the Terracotta Warriors specimen can be kept parallel to the pressure direction, and the width of the specimen size can be adjusted. The rollers on both sides eliminate the friction on the side of the specimen, ensuring the accuracy of the shear strength value.

[0038] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be modified and varied in various ways. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A fixture for testing the shear strength of Qin Terracotta Warriors and Horses adhesive, characterized in that: The invention comprises a first support seat (1), a second support seat (2) and a base (3), wherein the first support seat (1) and the second support seat (2) are mounted on the base (3), a distance for mounting a terracotta warrior specimen is reserved between the first support seat (1) and the second support seat (2), and support components for supporting the terracotta warrior specimen on the sides are provided on adjacent surfaces of the first support seat (1) and the second support seat (2), wherein the support components have movable components; After the first support seat (1) and the second support seat (2) clamp the Terracotta Warriors and Horses specimen, the movable component can move synchronously with the movement of the section of the Terracotta Warriors and Horses specimen; The base (3) is provided with a slide groove (11) at the position where the first support seat (1) and the second support seat (2) are installed. The first support seat (1) and the second support seat (2) are both embedded in the slide groove (11). By adjusting the position of the first support seat (1) and the second support seat (2) in the slide groove (11), the distance between the adjacent surfaces of the first support seat (1) and the second support seat (2) can be adjusted. The first support seat (1) and the base (3) as well as the second support seat (2) and the base (3) are connected by a fixing device. The supporting component adopts a roller device, the roller device comprising a roller support (12) and a plurality of rollers (6) mounted on the roller support (12), the roller support (12) being mounted on the first supporting seat (1) and the second supporting seat (2), a plurality of rollers (6) being arranged at intervals on the roller support (12), the plurality of rollers (6) forming a roller track and serving as the movable component, the plurality of rollers (6) being used to support the side surface of the Terracotta Warriors and Horses specimen.

2. A fixture for testing the shear strength of Qin Terracotta Warriors and Horses adhesive according to claim 1, characterized in that: The fixing device adopts bolts.

3. A fixture for testing the shear strength of Qin Terracotta Warriors and Horses adhesive according to claim 2, characterized in that: The bottoms of the first support seat (1) and the second support seat (2) are both provided with through holes for the bolts to pass through, and the bottom of the slide groove (11) on the base (3) is provided with a long hole (13) for the bolts to pass through, and the long hole (13) is arranged along the length direction of the slide groove (11).

4. A fixture for testing the shear strength of Qin Terracotta Warriors and Horses adhesive according to any one of claims 1 to 3, characterized in that: There is a clearance fit between the first support seat (1) and the slide groove (11), and there is a clearance fit between the second support seat (2) and the slide groove (11).

5. A fixture for testing the shear strength of Qin Terracotta Warriors and Horses adhesive according to claim 1, characterized in that: A belt is wound around the plurality of roller shafts (6), and the belt is in a tensioned state.

6. A fixture for testing the shear strength of Qin Terracotta Warriors and Horses adhesive according to claim 1, characterized in that: The roller support (12) is detachably connected to the first support seat (1) and the second support seat (2) via bolts.

7. A fixture for testing the shear strength of Qin Terracotta Warriors and Horses adhesive according to claim 6, characterized in that: The holes on the first support seat (1) and the second support seat (2) through which the bolts pass are configured as long holes, and the length direction of the long holes is perpendicular to the axis of the roller shaft (6).

8. A fixture for testing the shear strength of Qin Terracotta Warriors and Horses adhesive according to claim 1, characterized in that: The first support seat (1) and the second support seat (2) have the same structure and both adopt an L-shaped support seat, wherein two sides of the L-shaped support seat are perpendicular to each other and a reinforcing rib plate (14) is connected between the two sides.

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