阅读说明：本技术 一种金属密封环加工方法及金属密封环 (Metal sealing ring processing method and metal sealing ring ) 是由 龚清清 刘大为 阳纯杨 刘亚雄 罗莉 于 2020-12-24 设计创作，主要内容包括：本发明提供了一种金属密封环加工方法及金属密封环,涉及金属密封环制造技术领域。金属密封环加工方法包括步骤：制得密封环本体；其中,密封环本体的表面具有用于密封的两个密封面,两个密封面分别位于密封环本体相对的两侧,两个密封面之间的区域为非密封面；将非密封面隔离,并在密封面上镀覆软金属层。通过金属密封环加工方法制得的金属密封环,软金属层镀覆在密封环本体两侧的密封面上,利用软金属层在受压时本身的延展性和塑性变形的特性来弥补密封面上密封线的缺陷,进而提高金属密封环的密封性能,使用寿命更长。(The invention provides a metal sealing ring processing method and a metal sealing ring, and relates to the technical field of metal sealing ring manufacturing. The processing method of the metal sealing ring comprises the following steps: preparing a sealing ring body; the sealing ring comprises a sealing ring body, a sealing ring body and a sealing ring, wherein the surface of the sealing ring body is provided with two sealing surfaces for sealing, the two sealing surfaces are respectively positioned at two opposite sides of the sealing ring body, and an area between the two sealing surfaces is a non-sealing surface; the non-sealing surfaces are isolated and a soft metal layer is plated on the sealing surfaces. According to the metal sealing ring manufactured by the metal sealing ring processing method, the soft metal layers are plated on the sealing surfaces on two sides of the sealing ring body, the defects of sealing lines on the sealing surfaces are made up by using the ductility and plastic deformation characteristics of the soft metal layers when the soft metal layers are pressed, the sealing performance of the metal sealing ring is further improved, and the service life is longer.)

1. A metal sealing ring processing method is characterized by comprising the following steps:

preparing a sealing ring body; the sealing ring comprises a sealing ring body, wherein the surface of the sealing ring body is provided with two sealing surfaces for sealing, the two sealing surfaces are respectively positioned at two opposite sides of the sealing ring body, and an area between the two sealing surfaces is a non-sealing surface;

isolating the non-sealing surface and plating a soft metal layer on the sealing surface.

2. The method of claim 1, wherein the step of isolating the non-sealing surface and plating a soft metal layer on the sealing surface comprises the steps of:

providing an isolation layer on the non-sealing surface;

plating a soft metal layer on the surface of the sealing ring body, or plating a soft metal layer corresponding to the sealing surface;

and removing the isolation layer.

3. The method of claim 2, wherein the disposing an isolation layer on the non-sealing surface comprises:

arranging an isolation layer on the non-sealing surface in a coating or sticking mode;

the isolation layer is arranged along the circumferential direction of the sealing ring body, and the isolation layer covers the whole or partial area of the non-sealing surface.

4. The method of processing a metal seal ring according to claim 2 or 3, wherein the isolation layer comprises a conductive adhesive or a conductive tape.

5. The method of claim 1, wherein the soft metal layer comprises one of silver, nickel, and aluminum.

6. A metal seal ring, characterized in that it is manufactured by the metal seal ring processing method according to any one of claims 1 to 5.

7. The metal seal ring of claim 6, wherein said seal ring body of said metal seal ring is of an open, self-sealing type construction.

8. The metallic seal ring of claim 7, wherein a cross-section of the seal ring body in the radial direction is one of C-shaped, W-shaped, and E-shaped.

9. The metal seal ring of claim 6, wherein said seal ring body of said metal seal ring is of a closed, self-sealing type construction.

10. The metallic seal ring of claim 9 wherein the seal ring body is O-shaped in cross-section in the radial direction.

Technical Field

The invention relates to the technical field of metal sealing ring manufacturing, in particular to a metal sealing ring processing method and a metal sealing ring.

Background

The metal sealing ring is a static sealing element, and the metal sealing ring makes the sealing surface of the metal sealing ring fit with the sealing surface of a corresponding workpiece in a line contact manner by utilizing the compression resilience performance of the metal sealing ring so as to form initial sealing specific pressure, and the system pressure can further improve the sealing specific pressure.

It can be seen that the machining precision of the sealing surface of the metal sealing ring is a main factor influencing the sealing performance, and the requirements on the dimensional precision and the surface roughness of the sealing surface are particularly high. However, in the existing metal seal ring processing method, although the processing enables the seal surface to achieve possible precision performance, the seal surface still has the defects of microscopic unevenness and the like, and the defect degree on the seal surface is not consistent for the metal seal rings produced in the same batch. Such defects on the sealing surface may destroy the integrity of the sealing line, thereby causing leakage of the metal seal ring, reducing the sealing performance of the metal seal ring.

Disclosure of Invention

For overcoming not enough among the prior art, the application provides a metal seal ring processing method and metal seal ring for among the solution prior art, because of the concave-convex defect such as the sealed face of metal seal ring, make the integrality of the sealed line of sealed face destroyed, thereby lead to metal seal ring's leakage, the technical problem that sealing performance reduces.

In order to achieve the above object, in a first aspect, the present application provides a method for machining a metal seal ring, including the steps of:

preparing a sealing ring body; the sealing ring comprises a sealing ring body, wherein the surface of the sealing ring body is provided with two sealing surfaces for sealing, the two sealing surfaces are respectively positioned at two opposite sides of the sealing ring body, and an area between the two sealing surfaces is a non-sealing surface;

isolating the non-sealing surface and plating a soft metal layer on the sealing surface.

With reference to the first aspect, in one possible embodiment, the isolating the non-sealing surface and plating a soft metal layer on the sealing surface includes:

providing an isolation layer on the non-sealing surface;

plating a soft metal layer on the surface of the sealing ring body, or plating a soft metal layer corresponding to the sealing surface;

and removing the isolation layer.

With reference to the first aspect, in one possible implementation, the disposing an isolation layer on the non-sealing surface includes:

arranging an isolation layer on the non-sealing surface in a coating or sticking mode;

the isolation layer is arranged along the circumferential direction of the sealing ring body, and the isolation layer covers the whole or partial area of the non-sealing surface.

With reference to the first aspect, in one possible implementation, the isolation layer includes a conductive adhesive or a conductive tape.

With reference to the first aspect, in one possible implementation manner, the material of the soft metal layer includes one of silver, nickel, and aluminum.

In a second aspect, the application further provides a metal sealing ring which is manufactured by applying the metal sealing ring processing method.

With reference to the second aspect, in one possible embodiment, the seal ring body of the metal seal ring is of an open type self-sealing type structure.

With reference to the second aspect, in one possible embodiment, a cross-section of the seal ring body in the radial direction is one of C-shaped, W-shaped, and E-shaped.

With reference to the second aspect, in one possible embodiment, the seal ring body of the metal seal ring is of a closed self-sealing type structure.

With reference to the second aspect, in one possible embodiment, the seal ring body has an O-shape in cross section in the radial direction.

Compared with the prior art, the beneficial effects of the application are that:

the invention provides a metal sealing ring processing method and a metal sealing ring, wherein the metal sealing ring processing method comprises the following steps: preparing a sealing ring body; the sealing ring comprises a sealing ring body, a sealing ring body and a sealing ring, wherein the surface of the sealing ring body is provided with two sealing surfaces for sealing, the two sealing surfaces are respectively positioned at two opposite sides of the sealing ring body, and an area between the two sealing surfaces is a non-sealing surface; the non-sealing surfaces are isolated and a soft metal layer is plated on the sealing surfaces. According to the metal sealing ring manufactured by the metal sealing ring processing method, the soft metal layers are plated on the sealing surfaces on two sides of the sealing ring body, the defects of sealing lines on the sealing surfaces are made up by using the ductility and plastic deformation characteristics of the soft metal layers when the soft metal layers are pressed, and the sealing performance of the metal sealing ring is further improved.

In addition, because the soft metal layer is plated on the sealing surface and is not arranged on the surface of the whole sealing ring body, the soft metal layer can not crack and fall off in long-time work, and the service life is prolonged.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic perspective view illustrating a first metal seal ring according to an embodiment of the present disclosure;

FIG. 2 shows a cross-sectional view taken along line A-A of FIG. 1;

fig. 3 is a schematic perspective view illustrating a second metal sealing ring according to an embodiment of the present disclosure;

FIG. 4 shows a cross-sectional view taken along line B-B of FIG. 3;

FIG. 5 illustrates a partial cross-sectional view of a third metal seal ring provided by an embodiment of the present application;

FIG. 6 is a flow chart illustrating a method for machining a metal seal ring according to an embodiment of the present disclosure;

FIG. 7 is a flow chart illustrating another method for machining a metal seal ring according to an embodiment of the present disclosure;

FIG. 8 is a flow chart illustrating a method for machining a metal seal ring according to a fourth embodiment of the present disclosure;

FIG. 9 is a flow chart illustrating a method for machining a metal seal ring according to a fifth embodiment of the present disclosure;

fig. 10 shows a flowchart of a method for machining a metal seal ring according to a sixth embodiment of the present application.

Description of the main element symbols:

100-a seal ring body; 100 a-an inner ring portion; 100 b-an outer ring portion; 110-a sealing surface; 120-a non-sealing surface;

200-soft metal layer.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

Example one

Referring to fig. 1 to 7, the metal seal ring provided in the present embodiment has good sealing performance and longer service life.

Referring to fig. 1, fig. 2 and fig. 3, the metal seal ring provided in this embodiment includes a seal ring body 100, a surface of the seal ring body 100 has two sealing surfaces 110, the two sealing surfaces 110 are respectively located at two sides of the seal ring body 100, and an area between the two sealing surfaces 110 is a non-sealing surface 120, it can be understood that the non-sealing surface 120 is not used for sealing. In use of the metal seal ring, the two sealing faces 110 are in direct contact with the part to form a seal line.

In the present embodiment, the sealing surfaces 110 on both sides of the sealing ring body 100 are plated with soft metal layers 200.

Specifically, the seal ring body 100 further has an inner ring portion 100a and an opposite outer ring portion 100b, wherein the two seal faces 110 are oppositely disposed, and the two seal faces 110 are located between the inner ring portion 100a and the outer ring portion 100b, that is, the two seal faces 110 are distributed along the axial direction of the seal ring body 100, and the non-seal face 120 is located on the inner ring portion 100a and the outer ring portion 100 b.

In some embodiments, the material of the soft metal layer 200 includes one of silver, nickel, and aluminum.

It can be understood that the soft metal layer 200 has good ductility and plastic deformation characteristics when being pressed, and the ductility and plastic deformation characteristics of the soft metal layer 200 can be used to compensate for the defect of the sealing line on the sealing surface 110, so that even if the defect such as the unevenness exists on the sealing surface 110, the defect does not damage the sealing line on the sealing surface 110 due to the existence of the soft metal layer 200, and the sealing performance of the metal sealing ring is greatly improved.

In the metal seal ring provided in this embodiment, the soft metal layer 200 is plated only on the sealing surface 110 of the seal ring body 100, and the soft metal layer 200 is not plated on the non-sealing surface 120. That is, the seal ring body 100 is partially provided with the soft metal layer 200, and is not provided to the entire surface of the seal ring body 100.

It can be understood that, because the metal sealing ring works for a long time, the sealing ring body 100 can be repeatedly compressed and rebounded, the non-sealing surface 120 of the sealing ring body 100 is the position with the largest bending deformation, if the soft metal layer 200 is arranged on the non-sealing surface 120, the soft metal layer 200 can crack under the action of repeated compression and rebounding, and can fall off and fall off in severe cases. Over time, the cracks or chipping may continue to propagate and expand, eventually causing damage to the soft metal layer 200 at the ring seal line of the seal face 110, resulting in a reduced to complete failure sealing performance of the metal seal ring.

The metal seal ring provided by the present application adopts the purpose of locally disposing the soft metal layer 200: the phenomena of cracks and block falling of the soft metal layer 200 in long-time work are avoided, the service life of the metal sealing ring is prolonged, and the sealing performance is improved.

Referring to fig. 1, fig. 6 and fig. 7, the present embodiment also provides a method for processing a metal seal ring, including the following steps:

s100: manufacturing a sealing ring body 100;

wherein, the sealing ring body 100 is manufactured by adopting a rolling forming method.

S200: the non-sealing surface 120 is isolated and a soft metal layer 200 is plated on the sealing surface 110.

The plating is to cover the sealing surface 110 with a soft metal layer 200 by an electroplating process.

Further, in step S200, the step of isolating the non-sealing surface 120 and plating the soft metal layer 200 on the sealing surface 110 includes:

s210: a barrier layer is disposed on the non-sealing surface 120.

The isolating layer is arranged along the circumferential direction of the seal ring body 100, and is arranged to separate the sealing surface 110 from the non-sealing surface 120 of the seal ring body 100, so that the soft metal layer 200 is only plated on the sealing surface 110 and is not contacted with the non-sealing surface 120 during subsequent plating of the soft metal layer 200, thereby achieving the purpose of local plating of the soft metal layer 200.

S211: the surface of the seal ring body 100 is entirely plated with a soft metal layer 200.

S212: and removing the isolation layer.

In some embodiments, the method of providing an isolation layer on the non-sealing surface 120 in step S210 includes:

a barrier layer is applied to the non-sealing surface 120 of the seal ring body 100.

Wherein, as can be understood, the isolating layer is conductive adhesive, the conductive adhesive belongs to slurry, and the conductive adhesive is coated on the non-sealing surface 120 of the sealing ring body 100, and the conductive adhesive can be solidified, so as to achieve the purpose of isolating the non-sealing surface 120.

Further, after the soft metal layer 200 is plated, the conductive paste should be removed from the non-sealing surface, which may be removed by scraping or cleaning with a cleaning solution.

In other embodiments, the method of providing a release layer on the non-sealing surface 120 in step S210 includes:

a separation layer is provided on the non-sealing surface 120 of the seal ring body 100 by means of adhesion.

Wherein, as can be understood, the isolation layer is a conductive adhesive tape, and the conductive adhesive tape belongs to a flexible solid, and the purpose of isolating the non-sealing surface 120 is achieved by adhering the conductive adhesive tape to the non-sealing surface 120 of the sealing ring body 100.

Similarly, after the soft metal layer 200 is plated, the conductive tape should be removed from the non-sealing surface, and may be scraped, washed with a cleaning solution, or torn off.

According to the method for processing the metal sealing ring provided by the embodiment, the soft metal layers 200 are plated on the sealing surfaces 110 on the two sides of the sealing ring body 100, so that the sealing performance of the manufactured metal sealing ring is greatly improved, and the service life of the metal sealing ring is prolonged.

Example two

Referring to fig. 1 to 4, the metal seal ring provided in the present embodiment has good sealing performance and longer service life. The present embodiment is an improvement on the technology of the first embodiment, and compared with the first embodiment, the difference is that:

in the present embodiment, the metal sealing ring includes a sealing ring body 100, wherein the sealing ring body 100 is an open type self-sealing structure.

Further, the opening is located in the inner ring portion 100a of the seal ring body 100, that is, the non-sealing surface 120 is located in the outer ring portion 100b of the seal ring body 100, and when the soft metal layer 200 is plated, the isolation layer is disposed on the outer ring portion 100b, and the plated soft metal layer 200 extends from the opening end of the seal ring body 100 to the outer ring portion 100 b.

Referring to fig. 1 and 2, in some embodiments, the cross section of the seal ring body 100 along the radial direction is C-shaped, and the outer ring portion 100b of the seal ring body 100 with the C-shaped structure is an arc-shaped curved surface. Further, when the soft metal layer 200 is plated, the isolation layer may be disposed on the entire outer ring portion 100 b; of course, the isolation layer may be disposed at a local position of the outer ring portion 100 b.

Referring to fig. 3 and 4, in other embodiments, the cross section of the seal ring body 100 along the radial direction is W-shaped, and the outer ring portion 100b of the seal ring body 100 with the W-shaped structure is a complex curved surface, so that it is not appropriate to provide the isolation layer on the entire outer ring portion 100b when plating the soft metal layer 200, and therefore, it is only necessary to cover the non-sealing surface 120 of the outer ring portion 100b, but the isolation layer may also be provided at a local position of the outer ring portion 100b, for example, near the sealing surface 110.

In other embodiments, the cross-section of the seal ring body 100 along the radial direction is E-shaped, i.e. the outer ring portion 100b of the seal ring body 100 with the E-shaped structure is simple in structure, and the isolation layer can be provided with reference to the seal ring body 100 with the C-shaped structure.

EXAMPLE III

Referring to fig. 1 to 5, the metal seal ring provided in the present embodiment has good sealing performance and longer service life. The present embodiment is an improvement on the technology of the first embodiment, and compared with the first embodiment, the difference is that:

referring to fig. 1, fig. 2 and fig. 5, in the present embodiment, the metal seal ring includes a seal ring body 100, wherein the seal ring body 100 is a closed self-sealing structure.

That is, the inner ring portion 100a and the outer ring portion 100b of the seal ring body 100 are both non-sealing surfaces 120, and when the soft metal layer 200 is plated, both the inner ring portion 100a and the outer ring portion 100b are isolated, and the plated soft metal layer 200 extends from the sealing surface 110 of the seal ring body 100 to the inner ring portion 100a and the outer ring portion 100 b.

In some embodiments, the seal ring body 100 is O-shaped in cross-section in the radial direction.

Example four

Referring to fig. 1 to 8, the metal seal ring manufactured by the method for processing a metal seal ring according to the present embodiment has good sealing performance and longer service life. This embodiment is an improvement on the technology of any one of the first to third embodiments, and is different from any one of the first to third embodiments in that:

referring to fig. 6 and 8, in the method for processing a metal seal ring according to the present embodiment, in step S200, the step of plating a soft metal layer 200 on the sealing surface 110 on both sides of the seal ring body 100 includes:

s220: an isolation layer is provided over the entire non-sealing surface 120.

It will be appreciated that the isolation layer is located over the entire area of the non-sealing surface 120, and that the isolation layer covers the entire non-sealing surface 120, saving material and optimizing the process.

S221: the soft metal layer 200 is plated on the surface of the seal ring body 100 in a region corresponding to the sealing surface 110.

S222: and removing the isolation layer.

EXAMPLE five

Referring to fig. 1 to 9, the metal seal ring manufactured by the method for processing a metal seal ring according to the present embodiment has good sealing performance and longer service life. This embodiment is an improvement based on the technology of the fourth embodiment, and is different from the fourth embodiment in that:

referring to fig. 6 and 9, in the method for processing a metal seal ring according to the present embodiment, in step S200, the step of plating a soft metal layer 200 on the sealing surface 110 on both sides of the seal ring body 100 includes:

s230: a barrier layer is provided in the area of the non-sealing surface 120 adjacent to the sealing surface 110.

It will be appreciated that the spacer layer is located in a localized area of the non-sealing surface 120 and does not cover the entire non-sealing surface 120, saving material and optimizing process steps.

S231: the soft metal layer 200 is plated on the surface of the seal ring body 100 in a region corresponding to the sealing surface 110.

S232: and removing the isolation layer.

EXAMPLE six

Referring to fig. 1 to 10, the metal seal ring manufactured by the method for processing a metal seal ring according to the present embodiment has good sealing performance and longer service life. The present embodiment is an improvement on the technology of any of the above embodiments, and compared with any of the above embodiments, the difference is that:

referring to fig. 6 and 10, in the present embodiment, the soft metal layer 200 plated on the sealing surface 110 of the seal ring body 100 is a nickel layer, wherein the nickel electroplating process includes the following steps:

s240: nickel plating; the current density is 0.5-0.8A/dm²(ii) a The pH value is 5-5.5.

During electroplating, the sealing ring body 100 needs to be horizontally placed during clamping, so as to prevent the inner surface from generating an air pocket.

S241: removing hydrogen; the heating temperature is 200 +/-10 ℃, and the heating time is more than or equal to 23 h.

Wherein the time interval between the nickel plating step and the hydrogen removal step is not more than 4 h.

S242: and (6) checking.

Wherein, the content of the test is as follows:

(a) carrying out thickness inspection on the metal sealing ring plated with the nickel layer, and checking the plated size of the part according to a design drawing;

(b) the appearance color is silvery white with light yellow, the coating is uniform and fine, and the surface is not allowed to have bubbles and denser pinhole defects;

(c) the bonding force is tested, and the coating is free from layering and is not separated from the sealing ring body 100 by a bending method.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.