Strain gauge pasting treatment method for measuring strain of textile material

Abstract

The invention discloses a strain gauge pasting treatment method for measuring strain of a textile material. The method comprises the following steps: placing a textile material sample under a certain environmental condition; selecting an impurity-free area of the sampling piece, respectively fixing gluing molds on two surfaces, and uniformly coating an adhesive on the sample piece area surrounded by each gluing mold as a gluing area; flatly laying a film on the gluing area of the sample piece, and covering the film with a pressing sheet; the gluing area of the sample piece is pressurized and cured for the first time to form a glue surface; polishing the adhesive surface of the surface, to be pasted with the strain gauge, of the sample piece, and cleaning the polished adhesive surface; coating an adhesive on the adhesive surface to serve as a coating area, and pasting a strain gauge; covering the coating area of the sample piece with a thin film, extruding bubbles, and covering the thin film with a pressing sheet; and the coating area of the sample piece is pressurized and cured for the second time. The method can be used for pasting the strain gauge on the textile material, the problem that the bonding strength of the strain gauge and the textile material is insufficient is solved, and the pasting process is simple in step and convenient to operate.

Description

Technical Field

[0001] The invention relates to the field of textile material strain measurement, and in particular to a strain gauge pasting processing method for measuring the strain of textile materials. Background Art

[0002] The strain gauge is a component composed of a sensitive grid and other components used to measure strain. When in use, it is firmly pasted on the measuring point of the component. When the component is subjected to force, strain occurs at the measuring point, and the sensitive grid is deformed accordingly, causing its resistance to change. The resistance change is then measured by a special instrument and converted into the strain value of the measuring point.

[0003] At present, the commonly used process route for testing the strain of test specimens by pasting resistive strain gauges in the prior art is: cleaning the specimen surface (removing oil stains, rust spots and coatings, etc.) - polishing - cleaning - pasting - pressurization and curing, but there is no better pasting method that can reliably paste the strain gauge on the textile material. Summary of the invention

[0004] In order to solve the problem that there is no good pasting method in the prior art to reliably paste the strain gauge on the textile material, the present invention provides a strain gauge pasting processing method for measuring the strain of the textile material.

[0005] To this end, the technical solution adopted in the present invention is:

[0006] A strain gauge pasting processing method for measuring the strain of textile materials, the method comprising:

[0007] The textile material samples are placed under certain environmental conditions;

[0008] Select the impurity-free area of ​​the sample, fix the glue coating molds on both sides of the area, and evenly apply the adhesive on the sample area circled by each glue coating mold as the glue coating area;

[0009] Remove the glue coating mold, spread the film flat on the glue coating area of ​​the sample, and cover the film with a pressing sheet;

[0010] Perform the first pressurization and curing on the glue-coated area of ​​the sample to form a glue surface;

[0011] Polish the rubber surface of the sample to be bonded with the strain gauge, and clean the polished rubber surface;

[0012] Apply adhesive to the polished adhesive surface of the sample as the coating area and paste the strain gauge;

[0013] Cover the coated area of ​​the sample with a film, squeeze out the bubbles, and cover the film with a pressed sheet;

[0014] The coated area of ​​the sample was subjected to a second press cure.

[0015] According to the above scheme, the certain environmental conditions are specifically: placing the textile material sample in an environment with a temperature of (20±2)°C and a relative humidity of (65±2)%.

[0016] According to the above scheme, the area of ​​the impurity-free area of ​​the sample selected shall not be less than 20mm×10mm.

[0017] According to the above scheme, the adhesive is specifically prepared by mixing component A and component B in a weight ratio of 2:3; the component A reagent is composed of the following ingredients: 50% to 80% epoxy resin 1001, 5% to 30% limestone, 5% to 10% silica, 5% to 10% alumina, 1% to 5% pigment yellow, and 1% to 5% silica gel; the component B reagent is composed of the following ingredients: 60% to 90% polyamide, 5% to 30% alumina, and 1% to 10% quinidine.

[0018] According to the above scheme, the film is a polytetrafluoroethylene film.

[0019] According to the above scheme, the time of the first pressurization curing is not less than 24 hours.

[0020] According to the above scheme, the specific method of polishing the adhesive surface of the sample to be pasted with the strain gauge is: use sandpaper to gently polish the adhesive surface of the strain gauge surface at a 45° direction along the strain gauge surface to be pasted, and polish out cross stripes.

[0021] According to the above solution, the sandpaper is specifically sandpaper with a mesh not less than 400.

[0022] According to the above scheme, the cleaning of the polished rubber surface is specifically as follows: using a cotton ball soaked in acetone to clean the polished rubber surface, and then cleaning with ethanol until there is no dirt on the cotton ball.

[0023] According to the above scheme, the time of the second pressurization curing is not less than 72 hours.

[0024] The beneficial effects produced by the present invention are:

[0025] The present invention can be used to paste the strain gauge onto the textile material by adding an adhesive surface for pasting the strain gauge onto the textile material, thereby solving the problem of insufficient bonding strength between the strain gauge and the textile material. On the premise of ensuring the appearance, the bonding strength between the strain gauge and the textile material is improved, and a smooth pasting process is ensured. In addition, the pasting process steps of the present invention are simple and the operation is convenient. In addition, the adhesive used in the present invention has a special ratio, is more suitable for pasting the strain gauge onto the textile material, and is non-toxic and pollution-free. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the method flow of the present invention. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0028] The present invention provides a strain gauge pasting method for measuring the strain of textile materials, comprising:

[0029] S1. Place the textile material samples under certain environmental conditions.

[0030] The textile material samples are placed in a laboratory environment with a temperature of (20±2)℃ and a relative humidity of (65±2)%. After the samples are exposed to a non-specified environment, the equilibrium time is not less than 4 hours.

[0031] S2. Select an impurity-free area of ​​the sample, fix the gluing molds on both sides of the area, and evenly apply the adhesive on the sample area circled by each gluing mold as the gluing area.

[0032] Lay the textile material sample flat on the workbench and select an impurity-free area of ​​no less than 20mm×10mm. Use dovetail clamps to fix the gluing mold on both sides of the selected area, and use a brush to evenly apply the fully mixed adhesive to the gluing area of ​​each sample circled by the gluing mold.

[0033] In this embodiment, the preparation method of the adhesive used is: the weight ratio of component A reagent to component B reagent is 2:3 to prepare the adhesive; the component A reagent is composed of the following ingredients: 50% to 80% epoxy resin 1001, 5% to 30% limestone, 5% to 10% silicon dioxide, 5% to 10% aluminum oxide, 1% to 5% pigment yellow, 1% to 5% silica gel; the component B reagent is composed of the following ingredients: 60% to 90% polyamide, 5% to 30% aluminum oxide, and 1% to 10% trientine. The adhesive is drawn with a graduated dropper, and the weight of the component A reagent and the component B reagent are weighed in turn with a paper cup. The components A and B have different colors, wherein the component A reagent is brown and the component B reagent is gray, and they are fully mixed with a glass rod.

[0034] The adhesive should be prepared as needed and sealed and stored in the refrigerator after use, but the storage time should not be longer than 72 hours; unused adhesive should be sealed and stored in the refrigerator.

[0035] S3. Remove the glue coating mold, spread the film flat on the glue coating area of ​​the sample, and cover both sides of the film with a pressing sheet.

[0036] In this embodiment, the film used is a polytetrafluoroethylene film. Remove the dovetail clamp and the glue coating mold, spread the polytetrafluoroethylene film flat on the glue coating area of ​​the sample, squeeze out the bubbles with the glue coating mold, and then cover both sides of the film with a metal pressing sheet. The dovetail clamp can be used to temporarily fix the flattening process.

[0037] S4. Perform the first pressurization and curing on the glue-coated area of ​​the sample to form a glue surface.

[0038] Remove the dovetail clamp and lay the textile material sample flat on the workbench. In this embodiment, place the metal standard weight on the metal pressing sheet and pressurize and cure the glue-coated area of ​​the sample. The pressurization and curing time should be no less than 24 hours. The metal pressing sheets of multiple textile material samples can be stacked to form two piles of equal height, and two metal standard weights are used for pressurization to ensure that the pressure on the metal pressing sheet is no less than 0.1 MPa. To protect the sample, a film can be covered on the textile material sample before placing the weight, that is, step S3.

[0039] S5. Use sandpaper to polish the adhesive surface of the sample where the strain gauge is to be attached, and clean the polished adhesive surface.

[0040] Take out the textile material sample that has been coated with glue to form a glue surface, and use sandpaper with a mesh of not less than 400 to gently polish the glue surface of the textile material sample where the strain gauge is to be pasted at a 45° direction, and polish out cross stripes. Then clean the polished area with a cotton ball soaked in acetone, and then clean it with ethanol until there is no dirt on the cotton ball. Avoid touching or re-contaminating the cleaned surface.

[0041] S6. Apply adhesive to the polished adhesive surface of the sample as the coating area and paste the strain gauge.

[0042] After the polished glue surface is dry, use the glue coating mold and brush to evenly apply the configured adhesive liquid on the side of the sample where the strain gauge is to be pasted, and paste the strain gauge along the specified direction. The strain gauge should be pasted in the middle position of the fabric glue coating.

[0043] S7. Cover the coated area of ​​the sample with a film, squeeze out the bubbles, and cover the film with a metal press.

[0044] Cover the coated area with a polytetrafluoroethylene film, squeeze out the bubbles with a glue coating die, and then cover both sides of the film with a metal press.

[0045] S8. Perform a second press curing on the coated area of ​​the sample.

[0046] In this embodiment, a metal standard weight is placed on the metal pressing sheet to pressurize and cure the coated area of ​​the sample. The metal pressing sheets of multiple samples can be stacked to form two piles of equal height, and two metal standard weights are used for pressurization to ensure that the pressure on the metal pressing sheet is not less than 0.1MPa. To protect the sample, a film can be covered on the sample before placing the weight. The pressurization and curing time should be no less than 72 hours.

[0047] The present invention can be used to paste the strain gauge onto the textile material by adding an adhesive surface for pasting the strain gauge to the textile material, thereby solving the problem of insufficient bonding strength between the strain gauge and the textile material, and improving the bonding strength between the strain gauge and the textile material while ensuring the appearance, thereby ensuring a smooth pasting process; and the pasting process of the present invention is simple in steps, easy to operate, and stable in quality; in addition, the adhesive used in the present invention has a special ratio, is more suitable for pasting the strain gauge on the textile material, and improves the consistency of the pasting strength, which is beneficial to the subsequent mechanical test data collection, and is non-toxic and pollution-free.

[0048] It should be pointed out that, according to the needs of implementation, the various steps described in this application can be split into more steps, or two or more steps or partial operations of steps can be combined into new steps / components to achieve the purpose of the present invention.

[0049] The order of execution of each step in the above embodiment does not mean the order of execution. The order of execution of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiment of the present application.

[0050] It should be understood that those skilled in the art can make improvements or changes based on the above description, and all these improvements and changes should fall within the scope of protection of the appended claims of the present invention.

Claims

1. A strain gauge pasting method for measuring the strain of textile materials, characterized in that: The method comprises: The textile material samples are placed under certain environmental conditions; Select the impurity-free area of ​​the sample, fix the glue coating molds on both sides of the area, and evenly apply the adhesive on the sample area circled by each glue coating mold as the glue coating area; Remove the glue coating mold, spread the film flat on the glue coating area of ​​the sample, and cover the film with a pressing sheet; Perform the first pressurization and curing on the glue-coated area of ​​the sample to form a glue surface; Polish the rubber surface of the sample to be bonded with the strain gauge, and clean the polished rubber surface; Apply adhesive to the polished adhesive surface of the sample as the coating area and paste the strain gauge; Cover the coated area of ​​the sample with a film, squeeze out the bubbles, and cover the film with a pressed sheet; The coated area of ​​the sample was subjected to a second press cure.

2. A strain gauge pasting method for measuring the strain of textile materials according to claim 1, characterized in that: The certain environmental conditions are specifically: placing the textile material sample in an environment with a temperature of (20±2)°C and a relative humidity of (65±2)%.

3. A strain gauge pasting method for measuring the strain of textile materials according to claim 1, characterized in that: The area of ​​the impurity-free area of ​​the selected sample shall not be less than 20mm×10mm.

4. The strain gauge pasting processing method for measuring the strain of textile materials according to claim 1 is characterized in that: The adhesive is specifically prepared by mixing component A and component B in a weight ratio of 2:3; the component A reagent is composed of the following ingredients: 50% to 80% epoxy resin 1001, 5% to 30% limestone, 5% to 10% silicon dioxide, 5% to 10% aluminum oxide, 1% to 5% pigment yellow, and 1% to 5% silica gel; the component B reagent is composed of the following ingredients: 60% to 90% polyamide, 5% to 30% aluminum oxide, and 1% to 10% trientine.

5. The strain gauge pasting processing method for measuring the strain of textile materials according to claim 1 is characterized in that: The film is a polytetrafluoroethylene film.

6. A strain gauge pasting method for measuring the strain of textile materials according to claim 1, characterized in that: The time of the first pressurization curing is not less than 24 hours.

7. A strain gauge pasting method for measuring the strain of textile materials according to claim 1, characterized in that: The method of polishing the adhesive surface of the sample to be pasted with the strain gauge is specifically as follows: using sandpaper to gently polish the adhesive surface of the strain gauge surface at a 45° direction along the strain gauge surface to be pasted, and polishing out cross stripes.

8. A strain gauge pasting method for measuring the strain of textile materials according to claim 7, characterized in that: The sandpaper is specifically sandpaper with a mesh of not less than 400.

9. The strain gauge pasting processing method for measuring the strain of textile materials according to claim 1, characterized in that: The cleaning of the polished rubber surface is specifically as follows: using a cotton ball soaked in acetone to clean the polished rubber surface, and then cleaning with ethanol until there is no dirt on the cotton ball.

10. The strain gauge pasting processing method for measuring the strain of textile materials according to claim 1, characterized in that: The second pressurization curing time is not less than 72 hours.

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