Tool based on auxiliary single-lap-joint steel sheet sand blasting treatment

Abstract

The invention provides a tool based on sand blasting treatment of an auxiliary single-lap-joint steel sheet. The tool comprises a clamping plate with a handrail, a clamping plate and a clamp. According to the tool for assisting sand blasting treatment of the single-lap-joint steel sheets, simultaneous sand blasting of the multiple steel sheets can be achieved, the sand blasting speed is increased, and meanwhile the quality of the sand-blasted steel sheets is continuously improved. And meanwhile, the antiskid layers are arranged on the clamping plates, so that the steel sheets can be prevented from sliding or falling off during sand blasting in the sand blasting machine, and sand grains can be prevented from entering the clamping plates during sand blasting. The technical problems that efficient and rapid sand blasting cannot be achieved in the sand blasting process of the single-lap-joint steel sheet, and the sand blasting area and thickness are uneven can be solved, and the effects of rapid sand blasting and efficient sand blasting of the single-lap-joint steel sheet are achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of sandblasting tools, and in particular relates to a tool for assisting sandblasting of a single-lap steel sheet. Technical Background

[0002] Structural adhesive is a high-performance bonding material. In construction and civil engineering, construction adhesive is a commonly used connection material, such as steel, concrete, wood, etc., which plays a role in reinforcing the structure and stabilizing the bearing capacity. Traditional bolt connections and welding connections have certain limitations, such as complex connection processes, limited connection areas, and stress concentration during the welding process after connection. In contrast, structural adhesives have been widely valued and applied in the fields of construction, civil engineering, etc. due to their advantages such as large area, uniform connection, and no need for drilling.

[0003] Since structural adhesives are mainly used in civil engineering, the test of their adhesion is particularly important. In order to study the adhesion strength of structural adhesives, it is necessary to conduct a tensile shear test on the bonded structure. The tensile shear test is a more complex shear test method, which is suitable for studying the shear properties of fiber materials, composite materials and various adhesives. In the tensile shear test, the specimen is usually rectangular or trapezoidal, with both ends of the specimen fixed on the testing machine and the middle part subjected to tensile and shear loads.

[0004] The structural adhesive is subjected to a steel-to-steel tensile shear test. During the test, the shear stress and shear strain of the specimen can be obtained by measuring the deformation and load of the specimen, so as to study the shear performance and bonding performance of the material. GB / T 7124-2008 details the preparation and test methods of steel-to-steel tensile shear specimens. The tensile shear specimen is made of two 100mm*25mm No. 45 steel plates bonded by the tested structural adhesive, with an overlap length of 12.5mm. In order to simulate the bonding process of the adhesive to the steel as much as possible, and to ensure the uniformity and stability of the experiment, the steel sheet used in the tensile test needs to be sandblasted on the bonding part.

[0005] Since GB / T 7124-2008 clearly states that at least 5 pairs of steel sheets need to be stretched and sheared for each group of experiments to ensure the stability of the experimental data. The demand for tensile shear experiments in the laboratory has greatly increased, so the number of tensile shear specimens required for sandblasting each time is very large. By searching for invention patents, utility model patents and related literature, it was found that there was no corresponding information to solve the problem. Under normal circumstances, most sandblasting machines require manual sandblasting, so steel sheets cannot be sandblasted on a large scale, and the sandblasting position and sandblasting thickness cannot be ensured, which will affect the stability of the experimental data.

[0006] During the experiment, there are mainly the following problems:

[0007] (1) Most sandblasting machines are manual sandblasting machines, which cannot be used for effective sandblasting on a large scale and have low efficiency;

[0008] (2) For a single sandblasted steel sheet, it is impossible to ensure uniform sandblasting position and sandblasting thickness for all steel sheets, which increases the coefficient of variation of the experimental results;

[0009] (3) Due to the small size of the individual steel pieces and the dark interior of the sandblasting machine, it is difficult to sandblast. Summary of the invention

[0010] In view of the problems in the prior art, the present invention provides a tooling based on auxiliary single overlap steel sheet sandblasting

[0011] The tooling can be used for large-scale sandblasting. This tooling can hold 10 pairs of steel sheets for sandblasting. At the same time, the sandblasting position can be kept consistent. The same batch of sandblasted steel sheets can be compared. The sandblasting thickness can be controlled, which greatly improves the sandblasting efficiency. At the same time, the tooling itself has a relatively regular shape, is easy to operate, and is light and easy to carry. The tooling is equipped with an anti-slip layer that is not easy to cause the steel sheet to slip, and the sand will not enter the mold, ensuring the cleanliness of the steel sheet and the mold. The mold is equipped with a grab handle, which is convenient for taking the mold during sandblasting. At the same time, the mold is dark black, which forms a color contrast with the silver-white steel sheet, and it is more clear which part of the steel sheet is not evenly sandblasted.

[0012] The present invention mainly comprises:

[0013] Clip. Key components required to place the sandblasted steel sheet;

[0014] Clamp. Use the clamp to clamp the steel sheet to be sandblasted to prevent the steel sheet from slipping or falling off during the sandblasting process, which will reduce the sandblasting efficiency;

[0015] Anti-slip layer. Increase the friction coefficient between the clip and the steel sheet, further preventing the steel sheet from slipping and falling off during the sandblasting process;

[0016] Black appearance. Since the No. 45 steel sheet is silver-white, the part of the steel sheet after sandblasting is black. Since the sand and dust are flying inside the sandblasting machine, it is not easy to see the sandblasting status of the steel sheet, so the black appearance can clearly show the part of the steel sheet that has not been sandblasted. Increase the efficiency of sandblasting.

[0018] Compared with the hand-blasting technique, the present invention has the following beneficial effects:

[0019] 1. The tooling is small in size, light in weight and easy to operate;

[0020] 2. The tooling clip can be used to sandblast multiple steel sheets, and can also sandblast two layers of steel sheets on both sides. The clip can also control the uniformity of the sandblasting position of the steel sheet, making the sprayed steel sheet more beautiful and more uniform;

[0021] 3. The presence of the anti-slip layer in the clamp can not only prevent the steel sheet from slipping, but also prevent sand from entering the fixture and contaminating the steel sheet and the fixture;

[0022] 4. The black appearance makes it easier to see the sandblasting process. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is the disassembly diagram of the parts of the auxiliary single-lap steel sheet sandblasting tooling.

[0024] Figure 2 This is a front view of the schematic diagram of the assembly work of the auxiliary single-lap steel sheet sandblasting tooling.

[0025] Figure 3 A side view of the schematic diagram of the assembly work of the auxiliary single-lap steel sheet sandblasting tooling.

[0026] Figure 4 This is a schematic diagram comparing single lap steel sheets before and after sandblasting.

[0027] Figure 5 A three-dimensional view of the tooling to assist in sandblasting single-lap steel sheets.

[0028] In the figure, 1 is a load-bearing sheet, 2 is a clamp, 3 is an anti-slip layer, and 4 is an armrest. DETAILED DESCRIPTION

[0029] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solution of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] Example 1

[0031] Step (1) The requirements of the single lap steel plate in Example 1 meet GB / T 7124-2008. The length is 100 mm and the width is 25 mm. The single lap steel sheet of this size is placed in the auxiliary sandblasting tooling of this patent;

[0032] As shown in the accompanying drawings, an auxiliary single-lap steel sheet sandblasting tool of this embodiment includes:

[0033] Step (2) Lay the clip with the armrest flat;

[0034] Step (3) stacking the two single-lap steel sheets cleaned with alcohol, and then placing them on a clamping sheet with a handrail, exposing the portion to be sandblasted, and aligning the lower end of the steel sheet with the lower end of the clamping sheet;

[0034] Step (4) Repeat step (3) to make the steel sheet fully cover the clamping piece;

[0035] Step (5) placing the clip without the handrail on the steel sheet in step (4) so ​​that the bottom end of the clip is aligned with the lower end of the steel sheet;

[0036] Step (6) clamping the clip and the steel plate in step (5) with a clamp;

[0037] Step (7) Place the whole processed in step (6) into a sandblasting machine for sandblasting until the surface of the steel sheet is sandblasted evenly.

[0038] Comparative Example 1

[0039] The specifications of the steel sheet in this comparative example are consistent with those in the embodiment. Manual sandblasting is selected as the sandblasting method.

[0040] Step (1) stacking two single-lap steel sheets cleaned with alcohol;

[0041] Step (2) placing the steel sheet in step (1) into a sandblasting machine, holding two stacked single-lapped steel sheets by hand and sandblasting until the steel sheets are sandblasted evenly;

[0042] Example 1 and Comparative Example 1 were cured according to GB 50728-2011 in a constant temperature and humidity chamber at a curing temperature of 23° C. and a curing humidity of 50% for 7 days. After the curing, the two groups of tensile shear specimens were subjected to tensile failure, and the tensile shear section and tensile strength data were analyzed.

[0043] Result analysis:

[0044] Compared with the steel sheets made by manual sandblasting, the single-lap steel sheets made by the present invention have a more uniform sandblasting thickness and a uniform sandblasting area, which is more beautiful. In terms of efficiency, the number of Example 1 and Comparative Example 1 is the same. In terms of preparation time, Example 1 takes less time than Comparative Example 1. In terms of experimental results, the test results of the tensile shear specimens made by Example 1 are more stable, and the probability of interface fracture is greatly reduced. The test results of the tensile shear specimens made by Comparative Example 1 are not very stable, and the coefficient of variation of the results is relatively large.

[0045] It is obvious that the above embodiments are only for the purpose of providing a clear explanation of the examples provided, and are not intended to limit the implementation. In addition to the above description, a person skilled in the art may make other different changes or variations. It is not necessary and impossible to list all the implementations herein. The obvious changes caused by it are still within the scope of protection of the present invention.

Claims

1. A tooling for auxiliary single overlap steel sheet sandblasting, characterized in that: The utility model comprises a bearing sheet 1, a plurality of reinforcement clamps 2 required for reinforcement, an anti-slip layer 3, and a handrail 4.

2. The tooling for auxiliary single-lap steel sheet sandblasting according to claim 1, characterized in that: The material of the bearing sheet is a carbon fiber composite material, the material of the handrail 4 is a carbon fiber composite material, the material of the anti-slip layer 3 is a rubber material, and the material of the clamp is steel. After the required steel sheets are filled between the two carrier sheets 1 , a reinforcing fixture 2 is used to fix the bottom of the carrier sheets 1 .

3. The tooling for auxiliary single-lap steel sheet sandblasting according to claim 1, characterized in that: It can quickly perform sandblasting on large quantities of tensile shear specimens; it can keep the sandblasting parts of all steel sheets consistent, reduce experimental errors, and make the preparation of tensile shear specimens more rigorous; using this tooling can make the sandblasting more uniform.

4. The tooling for assisting steel plate sandblasting according to claim 1, characterized in that: The carrier sheet 1 is provided with an anti-slip layer 3 and a handrail 4 for convenient use of the tooling. The tooling has a black appearance, which contrasts with the silver-white steel sheet, making it convenient to check the sandblasting condition of the steel sheet surface during the sandblasting process.

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