Preparation system and method of small laboratory test sample surface identification grid

Abstract

The invention discloses a preparation system and method for a small laboratory test sample surface identification grid. The system comprises a control device; the number of the connecting pieces is two, one end of one connecting piece is connected with the control equipment, the other end of the connecting piece is fixedly connected with a marking tool, and electrolyte dipping cloth is arranged on the marking tool; one end of the other connecting piece is also connected with the control equipment, and the other end of the other connecting piece is a free end; and the template is used for constructing an identification grid on the workpiece. By adopting the system to mark grids on the surfaces of small test samples in a laboratory, the limitation that mark points cannot be pasted on the surfaces of the small test samples in the laboratory is solved. The method comprises the following steps: preparing corrosive liquid; cleaning the template with alcohol and drying the template; and the cleaned and dried template is placed on the surface of a workpiece, and the electrified marking tool is dipped in the prepared corrosive liquid and smeared on the template. When the method is adopted to mark the grids on the surface of the small test sample, the grids deform along with the sample and do not fall off.

Description

Technical Field

[0001] The invention belongs to the technical field of test sample deformation measurement, and in particular relates to a system and method for preparing a surface marking grid of a small test sample in a laboratory. Background Art

[0002] In recent years, with the rapid development of computer technology, optical components and digital image acquisition equipment, non-contact three-dimensional shape and deformation measurement based on computer vision has become a hot research topic at home and abroad. Photogrammetry is currently widely used in terrain surveying and mapping, bridge deformation observation, vehicle static load deformation measurement and wind turbine blade deformation measurement.

[0003] At present, the deformation measurement of large metal components using non-contact photogrammetry usually adopts the method of sticking coded markers and non-coded markers at key positions of the components to establish the coordinates of the components and calculate the deformation data. However, for small laboratory test samples, such as tensile samples and bending samples, it is difficult to stick coded markers and non-coded markers on their surfaces due to the limited sample size, or the markers are easy to fall off during the subsequent deformation process, which limits the application of non-contact photogrammetry in the field of deformation measurement of small laboratory test samples. Summary of the invention

[0004] The purpose of the present invention is to solve the problems in the prior art and to provide a system and method for preparing a surface identification grid of a small laboratory test sample.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] According to a first aspect of the present invention, a system for preparing a surface marking grid of a small laboratory test sample is provided, comprising: a control device; two connecting pieces, one end of one of the connecting pieces is connected to the control device, and the other end is fixedly connected to a marking tool, and the marking tool is provided with a cloth dipped in electrolyte; one end of the other connecting piece is also connected to the control device, and the other end is a free end;

[0007] Template for building the identification grid on the workpiece.

[0008] Furthermore, the connecting piece is a wire.

[0009] Furthermore, the marking tool is a marking work head.

[0010] Furthermore, the control device controls the power supply for the marking machine.

[0011] Furthermore, a plurality of circular holes are sequentially spaced apart on the template, and a grid surface is formed between the plurality of circular holes.

[0012] Furthermore, the cross section of the template is rectangular.

[0013] According to a second aspect of the present invention, there is provided a method for marking a grid on the surface of a test sample, the method being carried out using the preparation system as described above, comprising the following steps:

[0014] Prepare corrosive fluid;

[0015] Use alcohol to clean the template and dry it;

[0016] Place the cleaned and dried template on the workpiece surface, and dip the energized marking tool into the prepared etching solution and apply it on the template.

[0017] Further, preparing the corrosive liquid specifically includes:

[0018] At room temperature, phosphoric acid, oxalic acid, sodium nitrate, glycerol, ammonium chloride and deionized water are prepared according to the corresponding weight proportion of each component, and stirred evenly.

[0019] Furthermore, phosphoric acid, oxalic acid, sodium nitrate and ammonium chloride are all solid reagents, and the volume content of glycerol is not less than 98%;

[0020] The mass percentage of each component is: phosphoric acid 0.5-2%, oxalic acid 0.5-2%, sodium nitrate 4-6%, glycerol 3-10%, ammonium chloride 0.5-1%, and deionized water 82.5-90.5%.

[0021] Furthermore, after preparing the corrosive solution, the method further comprises:

[0022] Pre-treat the workpiece and wipe the surface clean with acetone.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] 1. The preparation system is used to perform grid marking on the surface of small laboratory test samples, which solves the limitation that marking points cannot be pasted on the surface of small laboratory test samples.

[0025] 2. The marking grid prepared by this system has a neat and standardized shape, a clear grid, no discoloration, no falling off, and is resistant to scrubbing with organic solvents such as alcohol and acetone.

[0026] 3. During the deformation process of the small laboratory test sample, the identification grid deforms along with the sample and does not fall off. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0028] Figure 1 A schematic diagram of the overall structure of a system for preparing a surface marking grid for a small laboratory test sample provided by the present invention;

[0029] Figure 2 A schematic diagram of a template in a system for preparing a surface marking grid for a small laboratory test sample provided by the present invention;

[0030] Figure 3 A flow chart of a method for marking a grid on the surface of a small laboratory test sample provided by the present invention;

[0031] Figure 4 This is a rendering of a grid marking effect on the surface of an X80 low-carbon steel in Example 1 of the method for marking a grid on the surface of a test sample provided by the present invention;

[0032] Figure 5 This is a rendering of a grid marking effect on the surface of X70 low-carbon steel in Example 4 of the method for marking a grid on the surface of a test sample provided by the present invention;

[0033] Among them: 1. Marking machine control power supply; 2. Wire; 3. Marking work head; 4. Cloth dipped in electrolyte; 5. Template; 6. Workpiece. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0035] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. 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.

[0036] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0037] In the description of the embodiments of the present invention, it should be noted that if the terms "upper", "lower", "horizontal", "inner", etc. indicate an orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the invention is usually placed when in use, it is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0038] In addition, if the term "horizontal" appears, it does not mean that the component must be absolutely horizontal, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", which does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0039] In the description of the embodiments of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0040] The present invention is further described in detail below in conjunction with the accompanying drawings:

[0041] The invention provides a system and method for preparing a surface identification grid of a small laboratory test sample.

[0042] According to the first aspect of the present invention, there is provided a system for preparing a surface identification grid of a small laboratory test sample, including a control device; two connectors, one end of which is connected to the control device, and the other end is fixedly connected to a marking tool, and the marking tool is provided with a cloth 4 dipped in electrolyte; one end of the other connector is also connected to the control device, and the other end is a free end; a template 5, which is used to construct an identification grid on a workpiece 6. Furthermore, the part of the connector with a free end is connected to the workpiece 6. Specifically, in this embodiment, the connector is a wire 2, and the wire 2 connected to the workpiece 6 is connected to the positive pole of the control device, and the wire 2 connected to the marking tool is connected to the negative pole of the control device. In this embodiment, the control device is preferably a marking machine control power supply 1, and the marking tool is preferably a marking work head 3. The cross-section of the template 5 is rectangular, and a plurality of circular holes are sequentially spaced apart on the template 5, and a grid surface is formed between the plurality of circular holes; wherein the center diameter of the circular hole is 1.5 mm, and the center spacing between each circular hole is 3 mm. In this embodiment, the surface roughness of the workpiece 6 is better than Ra3.2, such as Figure 1 and Figure 2 As shown, the electrolyte cloth 4 is installed at the bottom of the marking work head 3. When marking the grid on the surface of the small test sample, the etching solution is first prepared, and then the surface of the workpiece is wiped clean with acetone and placed on a flat and clean plane. Next, the grid template is cleaned with alcohol and dried. Then the template 5 is placed above the surface of the workpiece 6 where the marking grid needs to be prepared, and the two wires 2 on the marking machine control power supply 1 are connected to the marking work head 3 and the workpiece 6 respectively; wherein, the wire 2 connected to the workpiece 6 is connected to the positive pole of the marking machine control power supply 1, and the wire connected to the marking work head 3 is connected to the negative pole of the marking machine control power supply 1. After the marking machine control power supply 1 is powered on, the electrolyte cloth 4 at the bottom of the marking work head 3 is first used to dip in the pre-prepared etching solution, and then the marking work head 3 drives the electrolyte cloth 4 to slide evenly on the surface of the template 5, so that the etching solution can be completely applied to the template 5 and form a marking grid surface on the surface of the workpiece 6. Finally, the workpiece 6 with the prepared marking grid surface is cleaned with alcohol and dried.

[0043] According to a second aspect of the present invention, there is provided a method for marking a grid on the surface of a test sample, the method being performed using the preparation system as described above, such as Figure 3 As shown, the following steps are included:

[0044] S101, prepare a corrosive solution; specifically, the preparation of the corrosive solution needs to be carried out at room temperature, and the specific steps are: prepare phosphoric acid, oxalic acid, sodium nitrate, glycerol, ammonium chloride and deionized water according to the corresponding weight ratio of each component; in the preparation process, phosphoric acid, oxalic acid, sodium nitrate and ammonium chloride are all solid reagents, and the volume content of glycerol is not less than 98%; the mass percentages of the above components are: phosphoric acid 0.5-2%, oxalic acid 0.5-2%, sodium nitrate 4-6%, glycerol 3-10%, ammonium chloride 0.5-1%, deionized water 82.5-90.5%, and finally mix the components and stir them evenly; then pre-treat the workpiece 6 and wipe the surface of the workpiece 6 clean with acetone: wherein the pre-treatment is: grinding the surface of the workpiece 6, the roughness of the workpiece surface is better than Ra3.2, and then the wiped workpiece 6 is placed on a flat and clean plane.

[0045] S102, using alcohol to clean the template and dry it; wherein the drying method is preferably to use a hair dryer to dry it.

[0046] S103, place the cleaned and dried template 5 on the surface of the workpiece 6, dip the energized marking tool into the prepared etching liquid and apply it on the template 5, power on the marking machine control power supply 1, the working voltage of the marking machine control power supply 1 is 10-12V, dip the marking work head 3 into the etching liquid in S101 and wipe or shake it back and forth on the surface of the template 5 for 3-5s, and slide evenly to make the etching liquid completely smear on the template 5, and form a marking grid on the surface of the workpiece 6, finally use alcohol to clean and dry the workpiece 6 with the prepared marking grid, wherein the drying method is preferably to use a hair dryer to dry.

[0047] In order to further understand the method steps in this embodiment, this embodiment is described below by taking the workpiece 6 as low-carbon steel as an example.

[0048] Embodiment 1:

[0049] Taking the preparation of a marking grid on the surface of an X80 low carbon steel tensile sample as an example, a method for marking a grid on the surface of a test sample includes the following steps:

[0050] Step 1: At room temperature, prepare the low-carbon steel marking grid etching solution according to the following components in corresponding weights and stir evenly: phosphoric acid 2%, oxalic acid 0.5%, sodium nitrate 5.5%, glycerol 8.5%, ammonium chloride 1%, and deionized water 82.5%.

[0051] Step 2: Use acetone to wipe the surface of the X80 low-carbon steel tensile sample clean and place it on a flat and clean surface. The surface roughness of the workpiece 6 is Ra1.6.

[0052] Step 3: Clean the grid template 5 with alcohol and dry it with a hair dryer.

[0053] Step 4: Place the grid template 5 above the surface of the X80 low carbon steel tensile sample where the identification grid needs to be prepared.

[0054] Step 5. Connect the wire 2 on the marking machine control power supply 1 to the marking work head 3 and the X80 low-carbon steel tensile sample respectively, wherein the X80 low-carbon steel tensile sample is connected to the positive pole of the marking machine control power supply 1, and the marking work head 3 is connected to the negative pole of the marking machine control power supply 1.

[0055] Step 6. The marking machine control power supply 1 is powered on, and the working voltage is adjusted to 11V. The marking work head 3 is dipped in the etching liquid prepared in step 1, and is wiped or shaken back and forth on the surface of the grid template 5 for 4 seconds, and evenly slides over the surface of the X80 low carbon steel tensile sample until the etching liquid covers the entire surface of the X80 low carbon steel tensile sample where the marking grid needs to be prepared.

[0056] Step 7: Use alcohol to clean the X80 low-carbon steel tensile sample with the prepared marking grid, and use a hair dryer to dry it.

[0057] The results obtained through the above steps are as follows Figure 4 shown.

[0058] Embodiment 2:

[0059] Taking the preparation of a marking grid on the surface of an X70 low carbon steel tensile sample as an example, a method for marking a grid on the surface of a test sample includes the following steps:

[0060] Step 1: At room temperature, prepare the low-carbon steel marking grid etching solution according to the following components in corresponding weights and stir evenly: 0.5% phosphoric acid, 2% oxalic acid, 4% sodium nitrate, 10% glycerol, 0.5% ammonium chloride, and 83% deionized water.

[0061] Step 2: Use acetone to wipe the surface of the X70 low-carbon steel tensile sample clean and place it on a flat and clean surface. The surface roughness of the workpiece is Ra1.6.

[0062] Step 3: Clean the grid template 5 with alcohol and dry it with a hair dryer.

[0063] Step 4: Place the grid template 5 above the surface of the X70 low carbon steel tensile sample where the identification grid needs to be prepared.

[0064] Step 5. Connect the wire 2 on the marking machine control power supply 1 to the marking work head 3 and the X70 low-carbon steel tensile sample respectively, wherein the X70 low-carbon steel tensile sample is connected to the positive pole of the marking machine control power supply 1, and the marking work head 3 is connected to the negative pole of the marking machine control power supply 1.

[0065] Step 6. The marking machine control power supply 1 is powered on, and the working voltage is adjusted to 10V. The marking work head 3 is dipped in the etching liquid prepared in step 1, and wiped or shaken back and forth on the surface of the grid template 5 for 3s, and evenly slid across the surface of the X70 low carbon steel tensile sample until the etching liquid covers the entire surface of the X70 low carbon steel tensile sample where the marking grid needs to be prepared.

[0066] Step 7: Use alcohol to clean the X70 low-carbon steel tensile sample with the prepared marking grid, and use a hair dryer to dry it.

[0067] Embodiment three:

[0068] Taking the preparation of a marking grid on the surface of an X80 low-carbon steel bending sample as an example, a method for marking a grid on the surface of a test sample includes the following steps:

[0069] Step 1: At room temperature, prepare the low-carbon steel marking grid etching solution according to the following components in corresponding weights and stir evenly: 1.5% phosphoric acid, 1.5% oxalic acid, 6% sodium nitrate, 3.5% glycerol, 1% ammonium chloride, and 86.5% deionized water.

[0070] Step 2: Use acetone to wipe the surface of the X80 low-carbon steel bent sample clean and place it on a flat and clean surface. The surface roughness of the workpiece is Ra1.6.

[0071] Step 3: Clean the grid template 5 with alcohol and dry it with a hair dryer.

[0072] Step 4: Place the grid template above the surface of the X80 mild steel bending sample where the identification grid needs to be prepared.

[0073] Step 5. Connect the wire 2 on the marking machine control power supply 1 to the marking work head 3 and the X80 low-carbon steel bent sample respectively, where the X80 low-carbon steel bent sample is connected to the positive pole of the marking machine control power supply 1, and the marking work head 3 is connected to the negative pole of the marking machine control power supply 1.

[0074] Step 6. Turn on the control power supply 1 of the marking machine, adjust the working voltage to 12V, dip the marking work head 3 in the etching liquid prepared in step 1, wipe or shake it back and forth on the surface of the grid template 5 for 5s, and evenly slide it over the surface of the X80 low-carbon steel bent sample until the etching liquid covers the entire surface of the X80 low-carbon steel bent sample where the marking grid needs to be prepared.

[0075] Step 7. Use alcohol to clean the X80 low-carbon steel bending sample with the prepared marking grid, and use a hair dryer to dry it.

[0076] Embodiment 4:

[0077] Taking the preparation of a marking grid on the surface of an X70 low carbon steel bending sample as an example, a method for marking a grid on the surface of a test sample includes the following steps:

[0078] Step 1: At room temperature, prepare the low-carbon steel marking grid etching solution according to the following components in corresponding weights and stir evenly: phosphoric acid 1%, oxalic acid 1.5%, sodium nitrate 5.5%, glycerol 4%, ammonium chloride 0.5%, deionized water 87.5%.

[0079] Step 2: Use acetone to wipe the surface of the X70 low-carbon steel bent sample clean and place it on a flat and clean surface. The surface roughness of the workpiece is Ra1.6.

[0080] Step 3: Clean the grid template 5 with alcohol and dry it with a hair dryer.

[0081] Step 4: Place the grid template 5 above the surface of the X70 low carbon steel bending sample where the identification grid needs to be prepared.

[0082] Step 5. Connect the wire 2 on the marking machine control power supply 1 to the marking work head 3 and the X70 low-carbon steel bent sample respectively, where the X70 low-carbon steel bent sample is connected to the positive pole of the marking machine control power supply 1, and the marking work head 3 is connected to the negative pole of the marking machine control power supply 1.

[0083] Step 6. The marking machine control power supply 1 is powered on, and the working voltage is adjusted to 11V. The marking work head 3 is dipped in the etching liquid prepared in step 1, and wiped or shaken back and forth on the surface of the grid template 5 for 4s, and evenly slid across the surface of the X70 low-carbon steel bent sample until the etching liquid covers the entire surface of the X70 low-carbon steel bent sample where the marking grid needs to be prepared.

[0084] Step 7: Use alcohol to clean the X70 low-carbon steel bending sample with the prepared marking grid, and use a hair dryer to dry it.

[0085] The results obtained through the above steps are as follows Figure 5 shown.

[0086] 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 have various modifications and variations. 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 system for preparing surface identification grids for small laboratory test samples. It is characterized in that include: Control equipment; Two connecting pieces are provided, one end of one of the connecting pieces is connected to the control device, and the other end is fixedly connected to a marking tool, and the marking tool is provided with a cloth (4) dipped in electrolyte; One end of another of the connecting members is also connected to the control device, and the other end is a free end; A template (5) is used to construct a marking grid on a workpiece (6).

2. The preparation system according to claim 1, It is characterized in that The connecting piece is a wire (2).

3. The preparation system according to claim 1, It is characterized in that The marking tool is a marking working head (3).

4. The preparation system according to claim 1, It is characterized in that The control device is a marking machine control power supply (1).

5. The preparation system according to claim 1, It is characterized in that The template (5) is provided with a plurality of circular holes which are spaced apart in sequence, and a grid surface is formed between the plurality of circular holes.

6. The preparation system according to claim 1 or 5, It is characterized in that The cross section of the template (5) is rectangular.

7. A method for marking a grid on the surface of a test sample, It is characterized in that The method is carried out using the preparation system according to any one of claims 1 to 6, comprising the following steps: Prepare corrosive fluid; Use alcohol to clean the template and dry it; The cleaned and dried template is placed on the surface of the workpiece, and the energized marking tool is dipped into the prepared etching liquid and smeared on the template.

8. The method for marking a grid on the surface of a test sample according to claim 7, It is characterized in that The preparation of the corrosive liquid specifically comprises: At room temperature, phosphoric acid, oxalic acid, sodium nitrate, glycerol, ammonium chloride and deionized water are prepared according to the corresponding weight proportion of each component, and stirred evenly.

9. The method for marking a grid on the surface of a test sample according to claim 8, It is characterized in that The phosphoric acid, oxalic acid, sodium nitrate and ammonium chloride are all solid reagents, and the volume content of glycerol is not less than 98%; The mass percentages of the components are: 0.5-2% phosphoric acid, 0.5-2% oxalic acid, 4-6% sodium nitrate, 3-10% glycerol, 0.5-1% ammonium chloride, and 82.5-90.5% deionized water.

10. The method for marking a grid on the surface of a test sample according to claim 1, It is characterized in that After preparing the corrosive solution, it also includes: Pre-treat the workpiece and wipe the surface clean with acetone.

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