Tweezers for wiping method metallographic corrosion
By designing a combination of the tweezers body and the pressing support, the problem of uneven wiping caused by cotton adsorption in the etchant was solved, achieving etchant saving and ease of operation, and improving the accuracy of metallographic observation.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-31
- Publication Date
- 2026-03-10
AI Technical Summary
In existing metallographic etching techniques, cotton absorbs a large amount of etchant in the etchant, resulting in uneven wiping and affecting the observation of microstructures. Furthermore, immersion etching methods require a large amount of etchant and are not conducive to observation.
The main body of the tweezers includes a left clamping arm and a right clamping arm. The front end is an arc-shaped clamp, and the middle part is an outwardly convex arc-shaped structure. It is equipped with a pressing bracket and a spring, so that the tweezers can stably hold cotton, prevent corrosive agents from flowing into the hand area, and can be placed on the operating table for use.
It achieves uniform wiping of the etchant, saves on the amount of etchant used, is easy to operate, and improves the accuracy of metallographic observation.
Smart Images
Figure CN223981689U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to metallographic corrosion technical field relates to a kind of tweezers for wiping method metallographic corrosion. BACKGROUND
[0002] Metallographic microstructure observation is an important means to understand the relationship between material microstructure morphology and composition and performance, and the general analysis steps of metallographic examination are sampling, inlaying, rough grinding, fine grinding, polishing and corrosion. Finally, the organization is observed and analyzed. Corrosion is the last step of sample preparation. Generally, chemical reagents are used to etch the material organization to highlight it. A certain amount of cotton is used to absorb a small amount of etchant with tweezers, and the surface to be observed is wiped. The sample surface changes are observed while wiping until the sample is corroded to the required degree for rinsing and drying. However, the tweezers need to be put down during cleaning and drying, and the cotton is directly placed in the etchant. If the corrosion degree is not enough, it often needs to be re-corroded, and the cotton in the etchant is re-clamped with tweezers for wiping. However, the cotton immersed in the etchant will absorb a large amount of etchant, forming water droplets on the sample surface during wiping, which is not conducive to uniform wiping, causing uneven microstructure corrosion, and bringing difficulties to metallographic analysis. Another method is to immerse the entire surface to be observed in the etchant. This method requires etchant to cover the entire observation surface and needs to be immersed to a certain depth, so a large amount of etchant is needed. Since the sample observation surface is facing down, it is not conducive to observing the corrosion degree of the sample, which may cause over-corrosion and is not conducive to observing the metallographic structure. SUMMARY
[0003] The utility model provides a kind of tweezers for wiping method metallographic corrosion with simple structure and convenient operation.
[0004] The utility model discloses a kind of tweezers for wiping method metallographic corrosion, including tweezers main body, it is characterized by: the tweezers main body includes left clamping arm and right clamping arm, left clamping arm and right clamping arm rear end are fixed together as fixed end, left clamping arm and right clamping arm front end are free end, forming the arc-shaped clamp head of the cotton that is adsorbed etchant is clamped, the middle part of left clamping arm and right clamping arm is the arc-shaped structure that is outwardly convex, press bracket is provided in the middle part lower of tweezers main body, and tweezers main body is placed and controlled tweezers main body to carry out clamping operation.
[0005] As an improvement, the left clamping arm and the right clamping arm are made of a metal sheet with a certain elasticity, and the left clamping arm and the right clamping arm are symmetrically arranged. The arc-shaped clamp head is a hook-shaped structure for easy clamping.
[0006] Furthermore, the pressing bracket includes a left support leg and a right support leg arranged in a cross configuration. The left support leg and the right support leg are connected by rivets after crossing at the middle. The upper ends of the left support leg and the right support leg are fixed to the lower middle ends of the left clamping arm and the right clamping arm, respectively. The lower parts of the left support leg and the right support leg are supported by springs, so that the tweezers body tends to always maintain a clamping state.
[0007] Finally, the lower inner middle positions of the left and right support legs are respectively provided with bosses for spring installation, and the two ends of the springs are respectively sleeved on the bosses and supported between the left and right support legs.
[0008] Compared with existing technologies, the advantages of this invention are as follows: the front end of the tweezers body is designed with an arc-shaped clamp, which can easily clamp cotton soaked in a suitable amount of corrosive agent; a pressing bracket is provided, which can place the tweezers body on the operating table to prevent the corrosive agent from flowing down the tweezers into the hand-held operating area. This invention has a simple structure, is easy to operate, and has a low cost. When using the wiping method to etch metallographic samples, cotton soaked in a suitable amount of corrosive agent can be clamped on the tweezers. During the cleaning stage after sample etching, the tweezers containing the cotton soaked in corrosive agent can be stably placed on the sample stage for later use, which not only saves corrosive agent but also makes operation convenient. Attached Figure Description
[0009] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, wherein:
[0010] Figure 1 This is a schematic diagram of a preferred embodiment of the tweezers for metallographic etching using the wiping method according to this utility model;
[0011] Figure 2 This is a right-hand view of a preferred embodiment of the metallographic etching tweezers for wiping method according to this utility model;
[0012] The components in the attached diagram are labeled as follows: 1. Main body, 2. Pressing bracket, 3. Spring, 4. Rivet, 5. Arc-shaped clamp, 6. Boss. Detailed Implementation
[0013] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.
[0014] like Figure 1 , 2As shown, a tweezer for metallographic etching by wiping includes a tweezer body 1, a pressing bracket 2, and a spring 3. The tweezer body 1 includes a left clamping arm and a right clamping arm. The rear ends of the left and right clamping arms are fixed together as fixed ends, and the front ends of the left and right clamping arms are free ends, forming arc-shaped clamps 5 for gripping cotton that has absorbed the etchant. The middle part of the left and right clamping arms is an outwardly convex arc-shaped structure. The pressing bracket 2 is located below the middle part of the tweezer body 1, and serves to place the tweezer body 1 and control the tweezer body 1 to perform gripping operations.
[0015] The specific structure is as follows: the left and right clamping arms are made of metal sheets with a certain degree of elasticity. The left and right clamping arms are symmetrically arranged. The arc-shaped clamp head 5 is a hook-shaped structure that is easy to grip. It can not only easily grip the cotton that has absorbed the corrosive agent, but also prevent the corrosive agent from flowing down the tweezers body 1 to the middle and contaminating the tweezers hand-held operating area.
[0016] The pressing bracket 2 includes a left and right support leg that are arranged in a cross configuration. The left and right support legs are connected by rivets 4 after crossing at the middle. The upper ends of the left and right support legs are fixed to the lower middle ends of the left and right clamping arms, respectively. The lower parts of the left and right support legs are supported by springs 3, which tends to keep the tweezers body 1 in a clamping state. The lower inner middle of the left and right support legs are respectively provided with bosses 6 for mounting the springs 3. The two ends of the springs 3 are respectively sleeved on the bosses 6 and supported between the left and right support legs, so that the arc-shaped clamps 5 of the tweezers body 1 remain in a clamping state when no external force is applied.
[0017] The specific usage steps are as follows:
[0018] Step 1: Select the area to be observed and cut a 15mm×15mm×10mm sample using a cutting machine;
[0019] Step 2: Polish the sample from Step 1 using coarse sandpaper and metallographic sandpaper.
[0020] Step 3: Polish the sample from Step 2 using a diamond polishing compound on a polishing machine;
[0021] Step four: Select a suitable corrosive agent for the sample from step three according to the type of material, press the pressing bracket 2 of the tweezers with your finger, and use the arc-shaped clamp 5 to pick up a suitable amount of cotton.
[0022] Step 5: Place the cotton obtained in Step 4 into contact with the corrosive agent, allowing it to absorb an appropriate amount of corrosive liquid. Wipe the sample from Step 3 back and forth and observe the degree of corrosion.
[0023] Step six: Place the cotton containing the corrosive solution on the test bench at an angle, hold it between tweezers, rinse the sample from step five, and blow it dry.
[0024] Step 7: Observe the sample dried in Step 6. If the degree of corrosion is insufficient, repeat Step 5 and Step 6.
[0025] Step 8: Organize the test site.
[0026] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.
Claims
1. A pincette for metallographic etching by wiping, comprising a pincette main body, characterized by: The tweezer body comprises a left clamping arm and a right clamping arm, the rear ends of the left clamping arm and the right clamping arm are fixed together as fixed ends, the front ends of the left clamping arm and the right clamping arm are free ends, forming arc-shaped clamping heads for clamping cotton for adsorbing corrosive agents, the middle parts of the left clamping arm and the right clamping arm are outwardly convex arc-shaped structures, and a pressing support for placing the tweezer body and controlling the tweezer body to perform clamping operation is arranged below the middle part of the tweezer body.
2. The pincette for wiping a metallographic etching according to claim 1, characterized by: The left clamping arm and the right clamping arm are made of metal sheets with certain elasticity, and the left clamping arm and the right clamping arm are symmetrically arranged, and the arc-shaped clamping heads are hook-shaped structures for facilitating clamping.
3. The pincette for wiping a metallographic etching according to claim 2, characterized in that: The pressing support comprises left and right supporting legs which are cross arranged, the middle parts of the left and right supporting legs are cross arranged and connected by rivets, the upper ends of the left and right supporting legs are fixed to the lower ends of the middle parts of the left and right clamping arms respectively, and the lower parts of the left and right supporting legs are supported by springs, so that the tweezer body has a tendency to always keep clamping.
4. The pincette for wiping a metallographic etching according to claim 3, characterized in that: The lower inner middle positions of the left and right supporting legs are respectively provided with bosses for mounting the springs, and the two ends of the spring are respectively sleeved on the bosses and supported between the left and right supporting legs.