CN216284729U

CN216284729U - Test tool suitable for testing tensile shear strength of bar planting adhesive by steel sheet method

Info

Publication number: CN216284729U
Application number: CN202122897636.9U
Authority: CN
Inventors: 景尤佳; 刘桂森; 张平萍; 李佳兴; 孙伟
Original assignee: Jilin Zhengda Traffic Construction Testing Co ltd; Sinosteel Nanjing New Material Research Institute Co Ltd; Sinosteel Zhengzhou Research Institute of Steel Wire Products Co Ltd
Current assignee: Jilin Zhengda Traffic Construction Testing Co ltd; Sinosteel Nanjing New Material Research Institute Co Ltd; Sinosteel Zhengzhou Research Institute of Steel Wire Products Co Ltd
Priority date: 2021-11-24
Filing date: 2021-11-24
Publication date: 2022-04-12
Anticipated expiration: 2031-11-24

Abstract

The utility model discloses a test tool suitable for testing the tensile shear strength of a bar planting adhesive by a steel sheet method, and relates to the technical field of bar planting adhesive tensile shear strength tests. The test tool comprises a hanging end and a lower U-shaped block, wherein the near end of the hanging end is used for hinging the steel sheet sample after being matched with the pin shaft, and the far end of the hanging end is connected with the testing machine in a threaded combination mode; go up U type piece and lower U type piece and all be by the cuboid along the same groove body structure of direction of height processing play one end area U type uncovered groove (4), the other end threaded hole, all processed round pin axle on the lateral wall of the uncovered groove left and right sides of U type and hung dress hole. The utility model can ensure the consistency of the long axis of the steel sheet sample and the force application direction in the test stretching process, can effectively prevent the steel sheet sample from slipping, further accurately and smoothly test the tensile shear strength of the bar planting adhesive, and has the advantages of accurate positioning, simple operation, convenient use, strong universality, cyclic utilization and low cost.

Description

Test tool suitable for testing tensile shear strength of bar planting adhesive by steel sheet method

Technical Field

The utility model relates to the technical field of a bar planting adhesive tensile shear strength test, in particular to a test tool suitable for testing the bar planting adhesive tensile shear strength by a steel sheet method.

Background

The bar planting glue has the advantages of high strength, strong bonding force, good durability, ageing resistance, good toughness after curing and strong shock resistance, is the same as pre-embedding, can be welded after bar embedding, does not need glue preparation in construction, saves the time of traditional glue preparation, and greatly improves the construction efficiency. Therefore, the bar-planting glue is widely applied to the embedding of steel bars or screws in various building structures. In order to master the tensile shear strength of the bar-planting adhesive, the bar-planting adhesive needs to be subjected to a tensile shear strength test before use.

The steel sheet method is used for testing the tensile shear strength of the bar planting adhesive, and mainly because a steel sheet sample is easy to manufacture, namely the steel sheet sample is manufactured firstly, namely a 45# sandblasted steel sheet is used for manufacturing two identical steel sheet sample plates with the size of 100 multiplied by 25 multiplied by 1.6 mm; then, a round pin hole matched with the diameter of the pin shaft is processed at one end of each of the two steel sheet sample plates, the end with the round hole is a hanging end, and the other end of each steel sheet sample plate is a bonding end; and then smearing bar planting glue on one side surface extending along the width direction in the bonding ends of the two steel sheet sample plates, buckling and pressing the two side surfaces together, ensuring that the two side surfaces bonded with the two steel sheet sample plates extend reversely along the length direction, and finishing the manufacturing of the steel sheet sample after the bar planting glue is solidified.

In actual tests and operations, it was found that tensile force was transmitted to the bond surface through the lengthwise direction of the specimen until failure, and the tensile shear strength f (f = p/a × b) of the specimen was calculated based on the maximum force p during failure of the specimen. This is necessary to ensure that the long axis of the specimen is aligned with the direction of the applied force during stretching, which is a prerequisite for ensuring the validity of the test data. However, the existing fixture tool for testing the tensile shear strength of the bar planting adhesive by the steel sheet method usually has the following problems in the test process:

(1) because the tensile force of the test sample is large, the traditional conventional fixture tool cannot clamp the test sample, so that the test sample is easy to slip from the fixture;

(2) the uncertainty of the thickness of the rubber layer in the steel sheet sample causes that an eccentric clamp with fixed offset distance cannot be used as a test clamp;

(3) the existing eccentric clamp in the market is complex in structure and troublesome in debugging, and is not suitable for being used in steel sheet method tests.

Therefore, a special test tool needs to be specially designed to ensure that the long axis of the sample is consistent with the force application direction during stretching, and the utility model is designed to meet the test requirements.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a test tool suitable for testing the tensile shear strength of the bar planting adhesive by a steel sheet method aiming at the defects in the prior art. The utility model can ensure the consistency of the long axis of the steel sheet sample and the force application direction in the test stretching process, can effectively prevent the steel sheet sample from slipping, further accurately and smoothly test the tensile shear strength of the bar planting adhesive, and has the advantages of accurate positioning, simple operation, convenient use, strong universality, cyclic utilization and low cost.

The object of the utility model can be achieved by the following technical measures:

the test tool suitable for testing the tensile shear strength of the bar planting adhesive by the steel sheet method comprises a hanging end, a hanging end and a lower U-shaped block, wherein the hanging end is used for hinging a steel sheet sample after the near end of the steel sheet sample is matched with a pin shaft, and the far end of the upper U-shaped block and the far end of the lower U-shaped block are connected with a testing machine in a threaded combination mode respectively; the upper U-shaped block and the lower U-shaped block are both of the same groove body structure with a U-shaped open groove at one end and a threaded hole at the other end, which are processed by a cuboid along the height direction (the threaded hole facilitates the quick connection of the utility model and a testing machine; the U-shaped open groove provides a hinge space and an embedding space for the extending end of the steel sheet sample), and pin shaft hanging holes are processed on the side walls of the left side and the right side of the U-shaped open groove (after a pin shaft is penetrated, the two extending ends of the steel sheet sample can be respectively and quickly hung in the corresponding U-shaped open grooves of the upper U-shaped block and the lower U-shaped block).

The pin shaft hanging hole of the upper U-shaped block is a long hole extending along the height direction, and the width of the long hole is matched with the diameter of the pin shaft (the upper U-shaped block is a moving end, so that the long hole with an adjustable penetrating position is directly processed on the upper U-shaped block to insert the pin shaft, the pin shaft is conveniently inserted, and the position of the pin shaft is finely adjusted in the stretching process).

The pin shaft hanging hole of the lower U-shaped block is a circular hole, and the diameter of the circular hole is matched with that of the pin shaft (the lower U-shaped block is a fixed end, so that the circular hole with a fixed penetrating position is directly processed on the lower U-shaped block to insert the pin shaft).

The design principle of the utility model is as follows:

the utility model designs a set of matched upper U-shaped block and lower U-shaped block, the near ends of the upper U-shaped block and the lower U-shaped block are respectively inserted with pin shafts and then used for hinging the hanging ends of the steel sheet samples, and the far ends of the upper U-shaped block and the lower U-shaped block are respectively and rapidly connected with the corresponding force application end and the fixed end of the testing machine in a threaded combination mode. Therefore, the steel sheet sample can be effectively prevented from slipping, the consistency of the long axis of the steel sheet sample and the force application direction in the test stretching process can be ensured, the tensile shear strength of the bar planting glue can be accurately and smoothly tested, and the bar planting glue testing device has the advantages of being accurate in positioning, simple in operation and convenient to use. In addition, for various different groups of steel sheet samples, only pin holes matched with the pin shafts need to be processed at the two extending ends, and the steel sheet samples can be quickly connected with the testing machine by using the quick connection device, so the quick connection device also has the advantages of strong universality, cyclic utilization and low cost.

The utility model has the following beneficial technical effects:

the utility model can ensure the consistency of the long axis of the steel sheet sample and the force application direction in the test stretching process, can effectively prevent the steel sheet sample from slipping, further accurately and smoothly test the tensile shear strength of the bar planting adhesive, and has the advantages of accurate positioning, simple operation, convenient use, strong universality, cyclic utilization and low cost.

Drawings

Fig. 1 is a schematic view of the present invention in use.

Fig. 2 is a front view showing the structure of the upper jig of the present invention.

Fig. 3 is a left side view of fig. 2.

Fig. 4 is a front view showing the structure of the lower clamp of the present invention.

Fig. 5 is a left side view of fig. 4.

Part number in the figures illustrates: 1. the device comprises an upper U-shaped block, a lower U-shaped block, a pin shaft, a U-shaped open groove, a pin shaft hanging hole, a steel sheet sample, 7-1 parts of steel sheet sample plates, 7-2 parts of bar planting glue, 8 parts of a testing machine force application end, 9 parts of a testing machine fixed end, 10 parts of a screw rod.

Detailed Description

The utility model is further described below with reference to the accompanying drawings:

as shown in figures 1-5, the test tool for testing the tensile shear strength of the bar-planting adhesive by the steel sheet method comprises a hanging end which is used for hinging a steel sheet sample after the near end is respectively matched with a pin shaft 3, the far ends of the upper U-shaped block 1 and the lower U-shaped block 2 are respectively connected with the testing machine in a threaded combination mode (the near ends of the upper U-shaped block 1 and the lower U-shaped block 2 are respectively inserted with a pin shaft 3 and then used for being hinged with a hanging end of a steel sheet sample, and the far ends of the upper U-shaped block 1 and the lower U-shaped block 2 are respectively and quickly connected with a corresponding force application end 8 and a fixed end 9 of the testing machine in a threaded combination mode, so that the steel sheet sample can be effectively prevented from slipping, the consistency of the long axis and the force application direction of the steel sheet sample in the test stretching process can be ensured, the tensile shear strength of the bar planting adhesive can be accurately and smoothly tested, and the bar planting adhesive has the advantages of accurate positioning, simple operation and convenient use; the upper U-shaped block and the lower U-shaped block are both of the same groove body structure with a U-shaped open groove 4 at one end and a threaded hole 5 at the other end, which are processed by a cuboid along the height direction (the threaded hole 5 facilitates the quick connection of the utility model and a testing machine; the U-shaped open groove 4 provides a hinge space and an embedding space for the extending end of the steel sheet sample), and pin shaft hanging holes 6 are processed on the side walls of the left side and the right side of the U-shaped open groove 4 (after a pin shaft 3 is penetrated, the two extending ends of the steel sheet sample can be respectively and quickly hung in the U-shaped open grooves 4 of the corresponding upper U-shaped block 1 and the lower U-shaped block 2).

The pin shaft hanging hole 6 of the upper U-shaped block 1 is a long hole extending along the height direction, and the width of the long hole is matched with the diameter of the pin shaft 3 (the upper U-shaped block 1 is a moving end, so that the upper U-shaped block 1 is directly processed into a long hole with adjustable penetrating position for inserting the pin shaft 3, the pin shaft 3 is conveniently inserted, and the pin shaft 3 is also convenient to finely adjust the position in the stretching process).

The pin shaft hanging hole 6 of the lower U-shaped block 2 is a circular hole, and the diameter of the circular hole is matched with that of the pin shaft 3 (the lower U-shaped block 2 is a fixed end, so that the lower U-shaped block 2 is directly processed into a circular hole with a fixed penetrating position for inserting the pin shaft 3).

The specific use cases of the utility model are as follows:

before the steel sheet sample is used, a steel sheet sample 7 is manufactured, namely two identical steel sheet sample plates 7-1 with the size of 100 multiplied by 25 multiplied by 1.6mm are manufactured by using a steel sheet made of 45# sandblasted steel; then, a round pin hole matched with the diameter of the pin shaft 3 is processed at one end of the two steel sheet sample plates, the end with the round hole is a hanging end, and the other end is a bonding end; and then coating bar planting glue 7-2 on one side surface of the bonding ends of the two steel sheet sample plates 7-1 extending along the width direction, buckling and pressing the two side surfaces together, ensuring that the two bonded side surfaces of the two steel sheet sample plates 7-1 extend reversely along the length direction, and finishing the manufacturing of the steel sheet sample 7 after the bar planting glue 7-2 is solidified.

Before the test, the steel sheet sample and the utility model are assembled, firstly, the lower U-shaped block 2 with the U-shaped open slot 4 placed upwards is connected and fixed at the fixed end 9 of the testing machine, namely, the screw 10 extending upwards at the fixed end 9 of the testing machine is screwed into the threaded hole 5 of the lower U-shaped block 2; then, connecting and fixing the upper U-shaped block 1 with the downward U-shaped open groove 4 at the moving end 8 of the testing machine, namely, screwing the screw 10 extending downwards from the moving end 8 of the testing machine into the threaded hole 5 of the upper U-shaped block 1; then, aligning a round pin hole at the bottom hanging end in the steel sheet sample 7 with a pin shaft hanging hole 6 (a round hole) of the lower U-shaped block 2, and then inserting a pin shaft 3 to realize the quick hinge joint of the steel sheet sample 7 and the lower U-shaped block 2; then aligning a round pin hole at the hanging end at the upper part in the steel sheet sample 7 with the bottom end of a pin shaft hanging hole 6 (a strip hole) of the upper U-shaped block 1 to a hole position, and then inserting a pin shaft 3 to realize the quick hinge joint of the steel sheet sample 7 and the upper U-shaped block 1; and finally, starting the testing machine for loading, driving the upper U-shaped block 1 and the steel sheet sample plate 7-1 positioned on the upper part of the steel sheet sample 7 to be upwards stretched by the moving end 8 of the testing machine, and slowly cracking the bar planting glue 7-2 coated on the bonding end of the two steel sheet sample plates 7-1 under the tearing and shearing actions of the upward tensile force and the downward tensile force by the other steel sheet sample plate 7-1 positioned on the lower part of the steel sheet sample 7 under the downward acting force from the fixed end 9 of the testing machine, the lower U-shaped block 2 and the pin shaft 3, thereby accurately and smoothly measuring the tensile shearing strength of the bar planting glue.

Claims

1. The utility model provides an experimental frock suitable for tensile shear strength of steel sheet method test bar planting glue which characterized in that: the test tool comprises an upper U-shaped block (1) and a lower U-shaped block (2), wherein the near end of the test tool is respectively matched with a pin shaft (3) and then used for hanging and installing a hinged steel sheet sample, and the far end of the test tool is respectively connected with the test machine in a threaded combination mode; go up U type piece and lower U type piece and all be by the cuboid along the same groove body structure of direction of height processing play one end area U type uncovered groove (4), another end threaded hole (5), and all processed round pin axle on the lateral wall of the uncovered groove of U type (4) left and right sides and hang dress hole (6).

2. The test tool suitable for testing the tensile shear strength of the bar planting adhesive by the steel sheet method according to claim 1, is characterized in that: the pin shaft hanging hole (6) of the upper U-shaped block (1) is a long hole extending in the height direction, and the width of the long hole is matched with the diameter of the pin shaft (3).

3. The test tool suitable for testing the tensile shear strength of the bar planting adhesive by the steel sheet method according to claim 1, is characterized in that: the pin shaft hanging hole (6) of the lower U-shaped block (2) is a circular hole, and the diameter of the circular hole is matched with that of the pin shaft (3).