Repair process for surface sealing joint of metal gasket

Abstract

The invention discloses a repair process of a metal gasket surface sealing joint, relates to the field of repair technologies of metal gasket surface sealing joints, and can solve the problems that in the prior art, the efficiency is low and the repair quality is difficult to guarantee when the metal gasket surface sealing joint is manually ground, polished and repaired. The repairing technology comprises the steps that the sealing end of the standard metal gasket face sealing connector is plated with a polishing material, then a polishing tool is prepared, the metal gasket face sealing connector polishes the polishing tool through a polishing device to enable the polishing tool to form a polishing groove, and then the metal gasket face sealing connector to be repaired is polished through the polishing device and the polishing tool. And the sealing end of the to-be-repaired metal gasket surface sealing joint is ground and repaired.

Description

Technical Field

[0001] The present application relates to the field of repair technology for metal gasket face sealing joints, and in particular to a repair process for metal gasket face sealing joints. Background Art

[0002] Metal gasket face seal joints have been widely used in the fields of semiconductors, optoelectronics, aerospace, etc. due to their excellent sealing performance and wide range of application scenarios. Metal gasket face seal joints are usually used for sealed connections that require high purity, high reliability and high safety, such as semiconductor production equipment, vacuum pipelines, special gas transmission pipelines, etc. Metal gasket face seal joints rely on the metal gasket to deform under pressure and fit tightly with the sealing end face to achieve efficient sealing. The end faces of these joints are usually designed with multiple curved surfaces to increase the effective contact surface and optimize stress distribution, thereby improving the overall sealing performance.

[0003] Usually, the sealing ends of two metal gasket face seal joints are butt-jointed and sealed by metal gaskets. However, during installation or operation, improper operations such as excessive tightening force, uneven force, accidental bumps, etc. may cause minor damage and deformation to the sealing end faces. These minor damage and deformation will seriously affect the sealing performance, especially in high pressure or high vacuum environments, and may even cause pollution, leakage, safety accidents and other problems.

[0004] In the prior art, when the end face of a metal gasket face seal joint is damaged or worn, it is usually necessary to cut and replace it with a new metal gasket face seal joint to maintain its sealing performance. However, this practice will significantly increase maintenance costs, especially in large-scale applications. Frequent replacement of new parts and joints not only consumes materials and funds, but also increases equipment downtime, thereby affecting overall production efficiency. Some companies choose to use manual hand-held grinders for grinding and polishing repairs, but the efficiency of manual hand-held grinders is low, especially when it is necessary to process precision surfaces. The rework speed is far from meeting the requirements of industrial production; secondly, the quality of manual grinding is difficult to guarantee. Not only are there surface unevenness and morphological changes caused by human factors, but the skill requirements for operators are also very high. Summary of the invention

[0005] To this end, the present application provides a repair process for a metal gasket face sealing joint to solve the problems in the prior art of manually grinding and polishing the metal gasket face sealing joint, which has low efficiency and difficulty in ensuring the repair quality.

[0006] In order to achieve the above objectives, this application provides the following technical solutions:

[0007] A repair process for a metal gasket face seal joint, wherein the sealing end of the metal gasket face seal joint has a plurality of continuous annular sealing end faces, and an annular sealing surface is formed on the outer peripheral side of the plurality of annular sealing end faces, and the process is characterized in that it comprises the following steps:

[0008] S1, abrasive is plated on the sealing end of the standard metal gasket face seal joint;

[0009] S2, preparing a grinding tool, wherein the grinding tool has a grinding surface;

[0010] S3, fix the grinding tool on the workbench of the grinding device, and connect the standard metal gasket surface sealing joint with the abrasive plated on the sealing end in step S1 to the working shaft of the grinding device, and rotate the grinding tool to grind the grinding surface of the grinding tool to form a grinding groove that matches the sealing end of the metal gasket surface sealing joint, the grinding groove has a plurality of grinding annular surfaces, and the plurality of grinding annular surfaces correspond to the plurality of annular sealing end surfaces one by one, and a non-ground annular plane and a non-ground circular plane are respectively formed at the notch of the grinding groove, the non-ground circular plane is located at the center of the grinding surface, and the non-ground annular plane is located at the edge of the grinding surface;

[0011] S4, connect the grinding tool to the working shaft of the grinding device, fix the metal gasket face sealing joint to be repaired on the working table of the grinding device, the grinding device controls the grinding tool to rotate and approach the sealing end of the metal gasket face sealing joint to be repaired, and the multiple grinding annular surfaces of the grinding groove grind the multiple annular sealing end surfaces of the metal gasket face sealing joint to be repaired, so as to grind and repair the sealing end of the metal gasket face sealing joint to be repaired.

[0012] Optionally, the grinding tool includes a grinding column and a connecting column connected to the end face of the grinding column and used to connect to the grinding device, the grinding surface is located on the side of the grinding column away from the connecting column, and the central axis of the grinding column and the central axis of the connecting column are collinear.

[0013] Optionally, the grinding device is a floating spindle grinder.

[0014] Optionally, after step S4, after the grinding tool has been used for a long time, multiple grinding annular surfaces of the grinding tool are ground by multiple annular sealing end surfaces of the metal gasket face sealing joint to be repaired, so that the depth of the grinding groove is deepened, the non-ground annular plane of the notch of the grinding groove is close to or abuts against the annular sealing surface of the metal gasket face sealing joint to be repaired, and the non-ground circular plane of the notch of the grinding groove enters into the pipe hole of the metal gasket face sealing joint;

[0015] The non-ground annular plane and the non-ground circular plane of the grinding tool are ground by a grinding tool to reduce the depth of the grinding groove so that a set gap is maintained between the non-ground annular plane and the annular sealing surface, and the non-ground circular plane is flush with the orifice of the pipe hole of the metal gasket face sealing joint.

[0016] Optionally, in step S4, the grinding device adopts intermittent polishing.

[0017] Optionally, the abrasive is silicon carbide abrasive or diamond abrasive.

[0018] Optionally, the grinding tool is made of a mixture of silicone material and abrasive material.

[0019] Optionally, the abrasive is diamond abrasive, silicon carbide abrasive or aluminum oxide abrasive.

[0020] Compared with the prior art, this application has at least the following beneficial effects:

[0021] The tiny depressions or tiny protrusions (tiny damage) on the annular sealing end surface of the sealing end of the metal gasket face sealing joint to be repaired are ground, that is, multiple annular sealing end surfaces of the metal gasket face sealing joint to be repaired are ground at the same grinding depth at the same time, so that while the tiny damage is removed by grinding, the consistency of the multiple annular sealing end surfaces with the sealing end of the standard metal gasket face sealing joint is also maintained. Compared with the manual grinding in the prior art, the process involved in this application not only shortens the repair time, but also improves the quality of the repair. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more intuitively illustrate the prior art and the present application, several exemplary drawings are given below. It should be understood that the specific shapes and structures shown in the drawings should not generally be regarded as limiting conditions for implementing the present application; for example, those skilled in the art are capable of easily making conventional adjustments or further optimizations to the addition / reduction / attribution division, specific shapes, positional relationships, connection methods, dimensional ratios, etc. of certain units (components) based on the technical concepts and exemplary drawings disclosed in the present application.

[0023] Figure 1 A schematic structural diagram of a metal gasket face seal joint provided in one embodiment of the present application;

[0024] Figure 2 for Figure 1 Cross-sectional view along the aa direction;

[0025] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0026] Figure 4A schematic diagram of the structure of a grinding tool provided in one embodiment of the present application;

[0027] Figure 5 A schematic diagram of the structure of a grinding tool after being polished provided by one embodiment of the present application;

[0028] Figure 6 for Figure 5 Cross-sectional view along the bb direction;

[0029] Figure 7 for Figure 8 Enlarged view of point B in the middle;

[0030] Figure 8 for Figure 7 Enlarged view of point C in the middle;

[0031] Fig. 9 A schematic structural diagram of a grinding tool and a metal gasket face sealing joint provided in one embodiment of the present application.

[0032] Description of reference numerals:

[0033] 1. Metal gasket face sealing joint; 11. Sealing end; 12. Pipe hole; 111. Annular sealing end face; 112. Annular sealing face; 2. Grinding tool; 21. Grinding column; 211. Grinding surface; 212. Grinding groove; 2121. Grinding annular surface; 213. Non-ground annular plane; 214. Non-ground circular plane; 22. Connecting column. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application 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 application and are not used to limit the present application.

[0035] In the description of this application: unless otherwise specified, the meaning of "plurality" is two or more. The terms "first", "second", "third", etc. in this application are intended to distinguish the objects referred to, and do not have special meanings in terms of technical connotations (for example, they should not be understood as emphasizing the importance or order, etc.). Expressions such as "including", "comprising", "having", etc. also mean "not limited to" (certain units, components, materials, steps, etc.).

[0036] refer to Figure 1-9The present application discloses a repair process for a metal gasket face sealing joint 1, wherein the sealing end 11 of the metal gasket face sealing joint 1 has a plurality of continuous annular sealing end faces 111, the plurality of annular sealing end faces 111 are adjacent to each other in sequence, and some of the plurality of annular sealing end faces 111 are planes and some are curved surfaces, the plurality of annular sealing end faces 111 have the same central axis, and the central axis is collinear with the central axis of the tube hole 12 of the metal gasket face sealing joint 1, an annular sealing surface 112 is formed on the outer peripheral side of the plurality of annular sealing end faces 111, the annular sealing surface 112 is continuously formed with the outermost annular sealing end face 111 among the plurality of annular sealing end faces 111, and the annular sealing surface 112 generally does not suffer from wear, and therefore does not need to be polished and repaired;

[0037] The rework process includes the following steps:

[0038] S1, firstly, the sealing end 11 of the standard metal gasket face sealing joint 1 is cleaned, and then the sealing end 11 of the standard metal gasket face sealing joint 1 is plated with abrasive by physical vapor deposition or electroplating technology; in some embodiments, the entire surface of the metal gasket face sealing joint 1 can be plated with abrasive;

[0039] S2, preparing a grinding tool 2, the grinding tool 2 having a grinding surface 211;

[0040] S3, fix the grinding tool 2 on the workbench of the grinding device, and connect the standard metal gasket surface sealing joint 1 with the sealing end 11 plated with abrasive in step S1 to the working axis of the grinding device, and the metal gasket surface sealing joint 1 rotates to grind the grinding tool 2, so that the grinding surface 211 of the grinding tool 2 is grinded to form a grinding groove 212 adapted to the sealing end 11 of the metal gasket surface sealing joint 1, and the grinding groove 212 has a plurality of grinding annular surfaces 2121 (not shown in the figure), and the plurality of grinding annular surfaces 2121 correspond to the plurality of annular sealing end faces 111 one by one, that is, the plurality of grinding annular surfaces 2121 and the plurality of annular sealing end faces 111 form a shape with male and female matching morphological features, and the notch of the grinding groove 212 respectively forms a non-ground annular plane 213 and a non-ground circular plane 214, the non-ground circular plane 214 is located at the center of the grinding surface 211, and the non-ground annular plane 213 is located at the edge of the grinding surface 211;

[0041] S4, connect the grinding tool 2 to the working axis of the grinding device, fix the metal gasket face sealing joint 1 to be repaired on the workbench of the grinding device, the grinding device controls the grinding tool 2 to rotate and approach the sealing end 11 of the metal gasket face sealing joint 1 to be repaired, and the multiple grinding annular surfaces 2121 of the grinding groove 212 grind the multiple annular sealing end surfaces 111 of the metal gasket face sealing joint 1 to be repaired, so as to grind and repair the sealing end 11 of the metal gasket face sealing joint 1 to be repaired, so that the tiny depressions, tiny protrusions or deformations (minor damages) on the annular sealing end surface 111 of the sealing end 11 of the metal gasket face sealing joint 1 to be repaired are ground, that is, the multiple annular sealing end surfaces 111 of the metal gasket face sealing joint 1 to be repaired are ground at the same grinding depth at the same time, so that while the tiny damages are removed by grinding, the consistency of the multiple annular sealing end surfaces 111 with the sealing end 11 of the standard metal gasket face sealing joint 1 is also maintained. Compared with the manual polishing in the prior art, the process involved in the present application not only shortens the rework time, but also improves the quality of the rework.

[0042] Among them, the metal gasket surface sealing joint 1 is a prior art, and the specific shape and structure of the multiple annular sealing end faces 111 and the annular sealing surface 112 of the metal gasket surface sealing joint 1 are not repeated any more.

[0043] The grinding tool 2 includes a grinding column 21 and a connecting column 22 connected to the end face of the grinding column 21 and used to connect to the grinding device. The grinding surface 211 is located on the side of the grinding column 21 away from the connecting column 22. The central axis of the grinding column 21 and the central axis of the connecting column 22 are collinear.

[0044] The grinding device is a floating spindle grinder. The floating spindle grinder is characterized in that its spindle can be displaced and adjusted in the axial and radial directions. In actual operation, when installing the metal gasket face sealing joint 1 to be repaired and the grinding tool 2, the irregularity of the shape of the grinding tool 2 or the deviation of the positioning accuracy may cause the tool and the joint surface to be unable to be completely aligned. The floating spindle can be adaptively adjusted according to the actual position of the workpiece, thereby eliminating this position deviation and ensuring that the grinding tool 2 always maintains a suitable contact angle and position with the annular sealing end face 111 to be repaired during the grinding process. Since the sealing end 11 of the metal gasket face sealing joint 1 usually has multiple curved surfaces, this floating characteristic can ensure that the grinding column 21 is always tightly fitted with each annular sealing end face 111.

[0045] After step S4, after the grinding tool 2 has been used for a long time, the multiple grinding annular surfaces 2121 of the grinding tool 2 are ground by the multiple annular sealing end surfaces 111 of the metal gasket face sealing joint 1 to be repaired, so that the depth of the grinding groove 212 is deepened, so that the non-ground annular plane 213 of the notch of the grinding groove 212 will be close to or abut against the annular sealing surface 112 of the metal gasket face sealing joint 1 to be repaired, and the annular sealing surface 112 does not need to be ground, especially when the non-ground annular plane 213 abuts against the annular sealing surface 112. The cover 112 will grind the annular sealing surface 112 unnecessarily, which will not only cause excessive impact on the entire grinding surface 211, but also cause collateral impact on the grinding groove 212. In addition, the non-ground circular plane 214 of the notch of the grinding groove 212 also enters into the pipe hole 12 of the metal gasket face sealing joint 1 due to excessive grinding, and the part entering the pipe hole 12 contacts the hole wall of the pipe hole 12, forming additional friction, which may cause excessive grinding of the pipe hole 12 of the metal gasket face sealing joint 1.

[0046] Therefore, the non-ground annular plane 213 and the non-ground circular plane 214 of the grinding tool 2 are ground by a grinding tool, and the depth of the grinding groove 212 is reduced so that a set gap is maintained between the non-ground annular plane 213 and the annular sealing surface 112, and the non-ground circular plane 214 is flush with the orifice of the pipe hole 12 of the metal gasket face sealing joint 1, so that the structural state of the multiple ground annular surfaces 2121 and the multiple annular sealing end faces 111 are restored.

[0047] The grinding tool may be a plane grinding wheel or the like.

[0048] It should be noted here that due to the structural characteristics of the multiple annular sealing end faces 111 of the metal gasket face sealing joint 1, the non-ground circular plane 214 of the grinding tool 2 is higher than the non-ground annular plane 213.

[0049] In some embodiments, the grinding tool 2 may also be eccentric in the radial direction of the grinding groove 212 of the grinding tool 2 due to positioning deviation of the grinding tool 2 or the metal gasket face sealing joint 1 to be repaired on the grinding device, especially positioning deviation of the grinding tool 2 or the metal gasket face sealing joint 1 to be repaired in its radial direction, so that one side is excessively worn. In this case, the entire grinding plane 211 of the grinding tool 2 needs to be properly ground and reduced by the grinding tool, and then the grinding tool 2 is re-grinded and corrected in step S3, so that the grinding groove of the grinding tool 2 is corrected to the standard grinding groove 212. In this way, the grinding tool 2 can be used multiple times, which significantly reduces the cost of material and tool replacement.

[0050] In step S4, the grinding device uses intermittent polishing. The intermittent grinding method helps to effectively control the temperature rise during the grinding process and avoid the problem of high temperature accumulation caused by continuous grinding. High temperature can cause changes in the physical properties of the metal gasket face seal joint 1 material, and can also cause changes in the material properties of the grinding tool 2 to affect or lose the grinding effect.

[0051] The abrasive is silicon carbide abrasive or diamond abrasive.

[0052] The grinding tool 2 is made of a mixture of silicone material and abrasives. The abrasives are diamond abrasives, silicon carbide abrasives or aluminum oxide abrasives. The silicone material has certain flexible deformation characteristics. During the repair and grinding process, if there is a deviation in the radial direction between the metal gasket surface sealing joint 1 to be repaired and the grinding groove 212 of the grinding tool 2, the silicone material can be adaptively elastically deformed during the grinding process, thereby effectively compensating for this deviation. This flexible deformation characteristic enables the grinding tool 2 to better match the sealing end 11 surface of the metal gasket surface sealing joint 1, ensuring that the grinding groove 212 is always in close contact with the annular sealing end face 111 of the joint to be repaired, avoiding the problem of uneven grinding due to deviation. At the same time, the abrasives (diamond abrasives, silicon carbide abrasives or aluminum oxide abrasives) in the grinding tool 2 ensure the grinding effect during the grinding process. The deformation characteristics of the silicone material combined with the high grinding performance of the abrasive make the grinding tool 2 have good adaptability during the repair process and ensure sufficient grinding effect.

[0053] In some embodiments, the grinding tool 2 may also be made of a mixture of other materials such as rubber and abrasives.

[0054] The technical features of the above embodiments may be arbitrarily combined (as long as there is no contradiction in the combination of these technical features). To make the description concise, not all possible combinations of the technical features in the above embodiments are described; these embodiments that are not explicitly written should also be considered to be within the scope of this specification.

[0055] The above is a relatively specific and detailed description of the present application through general description and specific embodiments. It should be understood that, based on the technical concept of the present application, several conventional adjustments or further innovations can be made to these specific embodiments; however, as long as they do not deviate from the technical concept of the present application, the technical solutions obtained by these conventional adjustments or further innovations also fall within the scope of protection of the claims of the present application.

Claims

1. A repair process for a metal gasket face seal joint, wherein the sealing end of the metal gasket face seal joint has a plurality of continuous annular sealing end faces, and an annular sealing surface is formed on the outer peripheral side of the plurality of annular sealing end faces, characterized in that: The following steps are involved: S1, abrasive is plated on the sealing end of the standard metal gasket face seal joint; S2, preparing a grinding tool, wherein the grinding tool has a grinding surface; S3, fix the grinding tool on the workbench of the grinding device, and connect the standard metal gasket surface sealing joint with the abrasive plated on the sealing end in step S1 to the working shaft of the grinding device, and rotate the grinding tool to grind the grinding surface of the grinding tool to form a grinding groove that matches the sealing end of the metal gasket surface sealing joint, the grinding groove has a plurality of grinding annular surfaces, and the plurality of grinding annular surfaces correspond to the plurality of annular sealing end surfaces one by one, and a non-ground annular plane and a non-ground circular plane are respectively formed at the notch of the grinding groove, the non-ground circular plane is located at the center of the grinding surface, and the non-ground annular plane is located at the edge of the grinding surface; S4, connect the grinding tool to the working shaft of the grinding device, fix the metal gasket face sealing joint to be repaired on the working table of the grinding device, the grinding device controls the grinding tool to rotate and approach the sealing end of the metal gasket face sealing joint to be repaired, and the multiple grinding annular surfaces of the grinding groove grind the multiple annular sealing end surfaces of the metal gasket face sealing joint to be repaired, so as to grind and repair the sealing end of the metal gasket face sealing joint to be repaired.

2. The rework process according to claim 1, characterized in that: The grinding tool comprises a grinding column and a connecting column connected to the end face of the grinding column and used to be connected to the grinding device, the grinding surface is located on the side of the grinding column away from the connecting column, and the central axis of the grinding column and the central axis of the connecting column are collinear.

3. The rework process according to claim 1, characterized in that: The grinding device is a floating spindle grinder.

4. The rework process according to claim 1, characterized in that: After step S4, after the grinding tool has been used for a long time, multiple grinding annular surfaces of the grinding tool are ground by multiple annular sealing end surfaces of the metal gasket face sealing joint to be repaired, so that the depth of the grinding groove is deepened, the non-ground annular plane of the notch of the grinding groove is close to or against the annular sealing surface of the metal gasket face sealing joint to be repaired, and the non-ground circular plane of the notch of the grinding groove enters into the pipe hole of the metal gasket face sealing joint; The non-ground annular plane and the non-ground circular plane of the grinding tool are ground by a grinding tool to reduce the depth of the grinding groove so that a set gap is maintained between the non-ground annular plane and the annular sealing surface, and the non-ground circular plane is flush with the orifice of the pipe hole of the metal gasket face sealing joint.

5. The rework process according to claim 1 or 3, characterized in that: In step S4, the grinding device adopts intermittent polishing.

6. The rework process according to claim 1, characterized in that: The abrasive is silicon carbide abrasive or diamond abrasive.

7. The rework process according to claim 1 or 2, characterized in that: The grinding tool is made of a mixture of silica gel material and abrasive material.

8. The rework process according to claim 7, characterized in that: The abrasive is diamond abrasive, silicon carbide abrasive or aluminum oxide abrasive.

Images