Automatic grinding and polishing device for hydrogen sulfide A method sample

Abstract

The utility model discloses a hydrogen sulfide A method sample automatic grinding and polishing device, and relates to the technical field of hydrogen sulfide A method sample grinding and polishing, the hydrogen sulfide A method sample automatic grinding and polishing device comprises a protective cover, a visual window, a base, a tailstock tip, a grinding fluid filtering and collecting system, a stirring system and a grinding head, a tailstock center is arranged on the base, a sample abuts against the position between the tailstock center and the pawl chuck, a servo motor is connected to the base, a transverse guide rail and a longitudinal guide rail are connected to the servo motor, and a polishing head is arranged on the longitudinal guide rail. The grinding fluid filtering and collecting system, the stirring system, the cooling nozzle and the grinding head are matched for grinding; the sample machining efficiency is improved, the problems that in the manual sample grinding process, stress is uneven, the sample is heated and overheated, residual stress is large and the like, and the test result is influenced are solved, and the influence of tiny circumferential grinding cracks on the surface of the sample on sample failure is solved or weakened.

Description

Technical Field

[0001] The utility model relates to the technical field of H2S A-method sample grinding and polishing, in particular to an automatic grinding and polishing device for H2S A-method samples. Background Technique

[0002] Standards such as NACE TM 0177 and GB / T 4157 have relatively high surface finish requirements for uniaxial tensile specimens in a H2S environment. In recent years, with the development of ultra-deep oil wells, the service of high-grade oil casings and tools must consider their sulfur resistance, and one of the evaluation methods is to conduct a uniaxial tensile test by the A method. Currently, the main process for processing A-method samples is: blanking - machining the blank on a CNC lathe - rough and finish grinding on a grinding machine - manual repair and grinding. In the subsequent manual grinding process, a large amount of manual time is often required for fine grinding and mirror polishing of the samples, and even multiple repairs are needed. There are many problems that affect the reliability of the test during the process of manually grinding the specimens. For example, specimen heating, overheating, uneven application of grinding force, or large residual stresses on the test surface caused by multiple repairs result in a low test pass rate. Secondly, the efficiency of manual polishing is low. It takes about 30 - 50 minutes to polish one sample, which cannot meet the requirements of the existing test rhythm at all. Moreover, the processing marks on the circumferential surface of the specimen are not easily ground completely, leading to the aggregation of corrosion ions during the test and premature fracture of the specimen.

[0003] Existing A-method sample processing devices have disadvantages such as low automation, low processing efficiency, specimen heating, overheating, large residual stresses caused by uneven specimen stress during manual sample grinding, etc., which affect the reliability of test results and high costs. For example, an axial force manual loading tooling for H2S corrosion resistance A-method testing of oil pipelines disclosed in the publication number CN218865700U includes an A-method testing device. The A-method testing device includes a base, a stress ring, and an A-method sample module to be tested. The upper end of the upper specimen fixing part of the stress ring is connected with a loading stud, and the loading stud passes through the top of the stress ring and is connected with a loading nut. A limiting plate is arranged on one side of the base. A limiting column is arranged on the side surface of the limiting plate, and a limiting block is arranged on the top. A limiting groove for the top of the loading stud to penetrate into is opened below the outer end of the limiting block. A loading positioning pin is detachably inserted and installed in the limiting groove. A stress ring extension plate is installed at the top of the stress ring below the limiting groove, and a displacement gauge for detecting the deformation of the stress ring is arranged above the stress ring extension plate. The utility model can realize the limitation and positioning of the stress ring and only apply a unidirectional axial force, eliminating the interference of forces in other directions and meeting the loading requirements of A-method testing. However, this solution cannot solve the problem of too high surface temperature during grinding and incomplete grinding of surface scratches.

[0004] Therefore, it is necessary to invent an automatic grinding and polishing device for H2S A-method samples to solve the above problems. Summary of the Invention

[0005] The purpose of the present utility model is to provide an automatic grinding and polishing device for A - method samples of hydrogen sulfide, so as to solve the problems of low automation degree of the A - method sample processing device in the prior art and incomplete grinding of processing marks.

[0006] In order to achieve the above purpose, the present utility model provides the following technical solutions: an automatic grinding and polishing device for A - method samples of hydrogen sulfide, including a protective cover, a viewing window, a base, a tailstock center, a grinding fluid filtration and collection system, a stirring system and a grinding head. The viewing window is slidably connected to the protective cover, the protective cover wraps the side of the base, the tailstock center is arranged on the base, a sample is abutted between the tailstock center and a pawl chuck, a servo motor is connected to the base, a transverse guide rail and a longitudinal guide rail are connected to the servo motor, the grinding head is arranged on the longitudinal guide rail, and a cooling nozzle is arranged on the side of the longitudinal guide rail at the same height as the grinding head.

[0007] Preferably, the cooling nozzle is electrically connected to the grinding fluid filtration and collection system and the stirring system.

[0008] Preferably, the transverse guide rail and the longitudinal guide rail are electrically connected to the grinding numerical control system.

[0009] Preferably, a servo motor is also arranged at the end of the transverse guide rail, and a buffer belt is arranged between the servo motor and the transverse guide rail.

[0010] Preferably, the surface of the tailstock center in contact with the sample is conical, and tracks are also arranged on the tailstock center and the pawl chuck.

[0011] Preferably, the positions of the tailstock center and the pawl chuck are opposite, and the grinding head is perpendicular to the tailstock center and the pawl chuck.

[0012] Preferably, the grinding fluid filtration and collection system and the stirring system are used in combination.

[0013] In the above technical solutions, the technical effects and advantages provided by the present utility model are as follows:

[0014] 1. The present utility model improves the sample processing efficiency through the cooperation of the grinding fluid filtration and collection system, the stirring system, the cooling nozzle and the grinding head, solves the problems of uneven stress, sample heating, overheating, large residual stress, etc. existing in the manual sample grinding process that affect the test results, and solves or weakens the influence of fine circumferential grinding marks on the sample surface on the sample failure.

[0015] 2. The present utility model continuously transports the filtered grinding fluid in the grinding fluid filtration and collection system to the cooling nozzle. During the process of grinding the sample, the temperature of the sample surface is reduced and the sample is ground synchronously, with high grinding efficiency and few surface scratches. Brief Description of the Drawings

[0016] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0017] Figure 2 is a three-dimensional structure diagram of the protective cover of the present utility model;

[0018] Figure 3 is a three-dimensional structure diagram of the tailstock center of the present utility model;

[0019] Figure 4 is a three-dimensional structure diagram of the grinding head of the present utility model;

[0020] Figure 5 is a three-dimensional structure diagram of the transverse guide rail of the present utility model.

[0021] Explanation of reference numerals:

[0022] 1, protective cover; 2, viewing window; 3, base; 4, tailstock center; 5, grinding fluid filtering and collecting system; 6, stirring system; 7, servo motor; 8, pawl chuck; 9, transverse guide rail; 10, longitudinal guide rail; 11, grinding head; 12, cooling nozzle; 13, grinding numerical control system. Specific implementation manner

[0023] In order to enable those skilled in the art to better understand the technical solution of the present utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0024] The present utility model provides a Figures 1-3 shown automatic grinding and polishing device for hydrogen sulfide A method sample, including a protective cover 1, a viewing window 2, a base 3, a tailstock center 4, a grinding fluid filtering and collecting system 5, a stirring system 6 and a grinding head 11. The viewing window 2 is slidably connected to the protective cover 1. The protective cover 1 wraps the side of the base 3. The tailstock center 4 is arranged on the base 3. A sample is abutted between the tailstock center 4 and the pawl chuck 8. A servo motor 7 is connected to the base 3. The transverse guide rail 9 and the longitudinal guide rail 10 are connected to the servo motor 7. The grinding head 11 is arranged on the longitudinal guide rail 10. A cooling nozzle 12 is arranged on the side of the longitudinal guide rail 10 at the same height as the grinding head 11.

[0025] The sample is placed between the tailstock center 4 and the pawl chuck 8, ground by the grinding head 11, cooled by the cooling nozzle 12, and the grinding fluid filtering and collecting system 5 is used to ensure that there are no scratches during the grinding process.

[0026] The cooling nozzle 12 is electrically connected to the grinding fluid filtering and collecting system 5 and the stirring system 6. The transverse guide rail 9 and the longitudinal guide rail 10 are electrically connected to the grinding numerical control system 13. A servo motor 7 is also arranged at the end of the transverse guide rail 9. A buffer belt is arranged between the servo motor 7 and the transverse guide rail 9.

[0027] By using the connection between the cooling nozzle 12 and the grinding fluid filtration and collection system 5, the sample is cooled synchronously during the grinding process of the grinding head 11, ensuring a smooth surface effect during grinding.

[0028] The surface of the tailstock center 4 in contact with the sample is conical, and the tailstock center 4 and the pawl chuck 8 are also provided with tracks. The tailstock center 4 and the pawl chuck 8 are opposite in position, the grinding head 11 is perpendicular to the tailstock center 4 and the pawl chuck 8, and the grinding fluid filtration and collection system 5 and the stirring system 6 are used in combination.

[0029] A sample is placed between the tailstock center 4 and the pawl chuck 8 and clamped, so that when the sample is ground, the stress points on both sides are small, the wear at the stress points is less, and the smooth surface area and degree are increased.

[0030] The working principle of the present utility model:

[0031] Refer to the attached Figures 1-3 When using the present utility model, first, the specimen is clamped between the tailstock center 4 and the pawl chuck 8. Then, according to the shape of the grinding part in the grinding numerical control system 13, the feed direction, trajectory, grinding amount, rotation speed, cycle times, etc. are set. After starting, the grinding numerical control system 13 will control the rotation speed of the servo motor 7, the pawl chuck 8, and the grinding head 11, as well as the moving direction and feed amount of the transverse guide rail 9 and the longitudinal guide rail 10 according to the program settings to grind the specimen.

[0032] Refer to the attached Figures 3-5 When using the present utility model, during the processing, the grinding fluid filtration and collection system 5 cools the specimen towards the cooling nozzle 12, and the grinding fluid filtration and collection system 5 filters the grinding fluid to prevent the particles generated after grinding from scratching the specimen. The stirring system 6 stirs the filtered grinding fluid to make the abrasive and the solvent mix evenly. After grinding, the specimen is inspected under a microscope for obvious scratches on the surface.

[0033] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variation thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device.

[0034] Although embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. An automatic grinding and polishing device for hydrogen sulfide A method sample, characterized in that: It includes a protective cover (1), a viewing window (2), a base (3), a tailstock center (4), a grinding fluid filtration and collection system (5), a stirring system (6) and a grinding head (11). The viewing window (2) is slidably connected to the protective cover (1). The protective cover (1) wraps the side of the base (3). The tailstock center (4) is arranged on the base (3). A sample is abutted between the tailstock center (4) and a pawl chuck (8). A servo motor (7) is connected to the base (3). A transverse guide rail (9) and a longitudinal guide rail (10) are connected to the servo motor (7). The grinding head (11) is arranged on the longitudinal guide rail (10). A cooling nozzle (12) is arranged on the side of the longitudinal guide rail (10) at a height flush with the grinding head (11).

2. The automatic grinding and polishing device for hydrogen sulfide A method sample according to claim 1, wherein: The cooling nozzle (12) is electrically connected to the grinding fluid filtration and collection system (5) and the stirring system (6).

3. An automatic grinding and polishing device for hydrogen sulfide A method sample according to claim 1, characterized in that: The transverse guide rail (9) and the longitudinal guide rail (10) are electrically connected to a grinding numerical control system (13).

4. The automatic grinding and polishing device for hydrogen sulfide A method sample according to claim 3, characterized in that: A servo motor (7) is also arranged at the end of the transverse guide rail (9). A buffer belt is arranged between the servo motor (7) and the transverse guide rail (9).

5. The automatic grinding and polishing device for hydrogen sulfide A method sample according to claim 1, characterized in that: The surface of the tailstock center (4) in contact with the sample is conical, and tracks are also arranged on the tailstock center (4) and the pawl chuck (8).

6. The automatic grinding and polishing device for hydrogen sulfide A method sample according to claim 5, characterized in that: The tailstock center (4) and the pawl chuck (8) are opposite in position, and the grinding head (11) is perpendicular to the tailstock center (4) and the pawl chuck (8).

7. An automatic grinding and polishing device for hydrogen sulfide A method sample according to claim 1, characterized in that: The grinding fluid filtration and collection system (5) and the stirring system (6) are used in combination.

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