Metal composite ring

Abstract

The utility model discloses a metal composite ring which comprises an outer shell metal ring and an inner container metal ring, the outer shell metal ring and the inner container metal ring are made of different metal materials, and the outer shell metal ring comprises an annular first welding part and an annular first connecting part protruding out of the end face of one end of the first welding part. The inner container metal ring comprises an annular second welding part and an annular second connecting part protruding out of the end face of one end of the second welding part, the first welding part and the second welding part are oppositely arranged in a spaced mode, and the first connecting part and the second connecting part are located between the first welding part and the second welding part; the first connecting part and the second connecting part are connected in a sleeved mode and fixedly connected, one end of the first connecting part abuts against and is fixedly connected with the end of the second welding part, and one end of the second connecting part abuts against and is fixedly connected with the end of the first welding part. The utility model has stable composite performance, and can avoid the risk of weld penetration when being assembled with a product.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of connecting piece for welding, in particular to a metal composite ring for connecting the inner container and the shell of a heat preservation container. BACKGROUND

[0002] In industrial production, how to effectively (ensure strength and sealing performance) weld two different metal materials together has certain difficulty, such as in the production process of a heat preservation cup, the inner container and the shell of the heat preservation cup (the inner container is generally made of titanium material, and the shell is generally made of steel material) are connected by welding.

[0003] In the existing production process, taking the production of a heat preservation cup as an example, a titanium steel composite ring is generally used to realize welding between a titanium inner container and a metal shell, the titanium steel composite ring is generally formed by combining two metal rings of different materials, and the two metal rings in the existing titanium steel composite ring are generally integrally sleeved, but when the composite ring is welded with the two different metals respectively, the inner metal ring and the outer metal ring on the same circumference are prone to air leakage and non-vacuum problems in the welding process due to the different welding melting points of the two metals, and some end portions of the two metal rings are connected by welding or an intermediate connecting piece, but because the materials of the two metal rings are different, the reliability and strength of such a connecting mode are also poor.

[0004] Therefore, it is necessary to design a structure that can avoid the mutual influence of the two metal rings in the welding process and ensure the strength of the composite metal ring. CONTENT OF THE UTILITY MODEL

[0005] The utility model aims at solving one of the technical problems in the related art to some extent. To this end, the utility model provides a metal composite ring, which has stable composite performance and can avoid the risk of welding through during product assembly.

[0006] In order to achieve the above purpose, the utility model adopts the following technical scheme: a metal composite ring, comprising an outer shell metal ring and an inner container metal ring, the outer shell metal ring and the inner container metal ring are made of different metal materials, the outer shell metal ring comprises a ring-shaped first welding portion and a ring-shaped first connecting portion protruding from one end surface of the first welding portion, the inner container metal ring comprises a ring-shaped second welding portion and a ring-shaped second connecting portion protruding from one end surface of the second welding portion, the first welding portion and the second welding portion are arranged in opposite directions, the first connecting portion and the second connecting portion are located between the first welding portion and the second welding portion, the first connecting portion and the second connecting portion are sleeved and fixedly connected with each other, one end of the first connecting portion is in abutment and fixed connection with the end portion of the second welding portion, and one end of the second connecting portion is in abutment and fixed connection with the end portion of the first welding portion.

[0007] In the technical solution, the composite metal ring includes an outer shell metal ring and an inner container metal ring. In use, the outer shell metal ring and the inner container metal ring can be made of different metal materials, so that better fixing effect between the two different metals can be achieved (for example, the inner container and the outer shell of the vacuum cup, one of the outer shell metal ring and the inner container metal ring is made of the same material as the outer shell to realize same-material welding with the outer shell, and the other is made of the same material as the inner container to realize same-material welding with the inner container).

[0008] In addition, the welding part (the first welding part and the second welding part) of the metal composite ring of the present application is arranged at the end position and forms a single-layer structure. Compared with the double-layer structure of different metal materials, when welding, the risk of metal layer welding caused by different welding points between different metal materials can be avoided. The inner container metal ring is connected through the first connecting part and the second connecting part. The connection effect is also more stable.

[0009] Further, the radial thickness of the first welding part is greater than the radial thickness of the first connecting part, and the radial thickness of the second welding part is greater than the radial thickness of the second connecting part. This helps to improve the radial thickness of the first welding part and the second welding part, and thus better welding quality can be achieved.

[0010] Further, the inner side surface of the first welding part is flush with the inner side surface of the first connecting part, the outer side surface of the first welding part protrudes outwardly along the radial direction from the outer side surface of the first connecting part, the outer side surface of the second welding part is flush with the outer side surface of the second connecting part, and the inner side surface of the second welding part protrudes inwardly along the radial direction from the inner side surface of the second connecting part. The overall appearance of the metal ring is improved, and thus the appearance of the container can be improved.

[0011] Further, one end of the first connecting part abuts against the part of the second welding part protruding from the second connecting part, and one end of the second connecting part abuts against the part of the first welding part protruding from the first connecting part. The composite effect is improved, and the overall integrity of the composite is better.

[0012] Further, the end of the first welding part and / or the end of the second welding part is provided with a beveled groove. This helps to improve the operability and welding quality of the welding.

[0013] Further, the first connecting part and the second connecting part are in interference fit between the outer wall and the inner hole. The inner container metal ring is combined more tightly.

[0014] Further, one of the outer shell metal ring and the inner container metal ring is made of titanium metal, and the other is made of copper or aluminum or stainless steel.

[0015] Further, the outer shell metal ring and the inner container metal ring are heated and rolled to be integrated into a structure.

[0016] Further, the metal composite ring further comprises a metallurgical composite layer, the metallurgical composite layer is arranged between the first connecting part and the second connecting part, and the first connecting part and the second connecting part are fixedly connected through the metallurgical composite layer.

[0017] Further, the radial thickness of the first welding part and the second welding part is between 0.5-2mm.

[0018] The features and advantages of the present application will be described in detail in the following detailed description and drawings. The best mode or means of the present application will be described in detail in conjunction with the drawings, but it is not a limitation of the technical scheme of the present application. In addition, these features, elements and components appearing in each of the following text and drawings are multiple, and different symbols or numbers are marked for convenience of representation, but all represent the same or similar structure or function parts. BRIEF DESCRIPTION OF DRAWINGS

[0019] The present application will be further described in conjunction with the drawings:

[0020] Figure 1 It is a front view of the metal composite ring of one embodiment of the present application;

[0021] Figure 2 It is a structure diagram of the initial state in the production process of the inner container metal ring and the outer shell metal ring of one embodiment of the present application;

[0022] Figure 3 It is a structure diagram of the initial state in the production process of the inner container metal ring and the outer shell metal ring of one embodiment of the present application; Figure 2 It is a schematic diagram of the metal composite ring formed by sleeving the outer shell metal ring and the inner container metal ring;

[0023] Figure 4 It is a schematic diagram of the metal composite ring formed by sleeving the outer shell metal ring and the inner container metal ring; Figure 3 It is a schematic diagram of the metal composite ring after hot rolling and pressing;

[0024] Figure 5 It is an assembly structure diagram of the metal composite ring, the inner container and the outer shell of the vacuum cup of one embodiment of the present application;

[0025] Figure 6 It is an assembly structure diagram of the metal composite ring, the inner container and the outer shell of the vacuum cup of one embodiment of the present application; Figure 5 It is an enlarged view of B;

[0026] Figure 7 It is an enlarged view of C. Figure 5

[0027] Among them,

[0028] 11, outer shell; 12, inner container;

[0029] ​20, metal composite ring; 21, outer shell metal ring; 211, first welding portion; 212, first connecting portion; 22, inner liner metal ring; 221, second welding portion; 222, second connecting portion; 23, bevel groove; 24, first welding point; 25, second welding point. DETAILED DESCRIPTION

[0030] Embodiments of the present application are described in detail below with reference to the attached drawing figures, wherein the same or like reference numerals and characters designate the same or like components throughout the drawings. Based on the embodiments in the embodiments, it is intended to explain the present application, and cannot be understood as a limitation of the present application.

[0031] In this specification, "one embodiment" or "an embodiment" or "example" or "exemplary" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the application. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment.

[0032] Referring to the drawings Figure 1 One embodiment of the present application discloses a metal composite ring 20, comprising an outer shell metal ring 21 and an inner liner metal ring 22, the outer shell metal ring 21 and the inner liner metal ring 22 adopt different metal materials, characterized in that the outer shell metal ring 21 comprises a ring-shaped first welding portion 211 and a ring-shaped first connecting portion 212 protruding from one end surface of the first welding portion 211, the inner liner metal ring 22 comprises a ring-shaped second welding portion 221 and a ring-shaped second connecting portion 222 protruding from one end surface of the second welding portion 221, the first welding portion 211 and the second welding portion 221 are oppositely spaced, the first connecting portion 212 and the second connecting portion 222 are located between the first welding portion 211 and the second welding portion 221, the first connecting portion 212 and the second connecting portion 222 are mutually sleeved and fixedly connected, one end of the first connecting portion 212 abuts against and is fixedly connected with the end portion of the second welding portion 221, and one end of the second connecting portion 222 abuts against and is fixedly connected with the end portion of the first welding portion 211.

[0033] In the embodiment, the outer shell metal ring 21 and the inner liner metal ring 22 in the metal composite ring 20 are generally provided with different metal materials, and the ring bodies of the two different materials are formed into an integral structure. In actual setting, the outer shell metal ring 21 and the inner liner metal ring 22 can be formed into an integral structure through assembly, such as through interference fit between the first connecting portion 212 and the second connecting portion 222 to realize fastening connection of the two, can be compounded into an integral structure through heating and rolling, and of course can be connected through an intermediate connecting piece, and the like, and the comparison is not specifically limited.

[0034] The two ends of the metal composite ring 20 in the embodiment in the axial direction are respectively a first welding part 211 and a second welding part 221, so that both end parts of the metal composite ring 20 are formed into single-layer metal structures, and in use, the two ends of the metal composite ring 20 can be respectively welded and connected with two external parts (such as the inner container 12 and the outer shell 11 of the vacuum cup), so that single-layer metal of the same material and welding of single-layer metal are formed at the welding parts, and the risk of welding through of double-layer different metal materials can be avoided, for example, if the parts connected by sleeving of the first connecting part 212 and the second connecting part 222 are welded with external parts, if the material of the external parts and the first connecting part 212 is the same and the welding melting point is high, then in welding, the metal layer (the second connecting part 222) with a lower welding melting point is also melted, so that the risk of welding through of the metal composite ring 20 is caused, and the product quality is affected.

[0035] In the embodiment, the first connecting part 212 and the second connecting part 222 are arranged between the first welding part 211 and the second welding part 221, and the structure of the first connecting part 212 and the second connecting part 222 sleeved and fixedly connected can not only improve the overall thickness of the connecting part and the overall strength of the metal composite ring 20, but also improve the reliability and stability of the connection between the outer shell metal ring 21 and the inner container metal ring 22.

[0036] In addition, in the embodiment, the end of the first welding part 211 abuts against the end of the second connecting part 222, and the end of the second welding part 221 abuts against the end of the first connecting part 212, so that no gap is formed on the side wall of the metal composite ring 20, and the strength of the entire axial length of the metal composite ring 20 is improved; and the end of the first welding part 211 is fixedly connected with the end of the second connecting part 222, and the end of the second welding part 221 is fixedly connected with the end of the first connecting part 212, so that the tightness of the combination between the two metal rings is improved, and the combination strength of the two metal rings is greatly improved in cooperation with the structure of the first connecting part 212 and the second connecting part 222 sleeved.

[0037] As one of the embodiments of the utility model, referring to the accompanying drawings, Figure 1 The radial thickness of the first welding part 211 is greater than the radial thickness of the first connecting part 212, and the radial thickness of the second welding part 221 is greater than the radial thickness of the second connecting part 222.

[0038] The first welding portion 211 and the second welding portion 221 in the embodiment have a larger thickness than the first connecting portion 212 and the second connecting portion 222, as shown in the drawings, the thickness of the first welding portion 211 and the second welding portion 221 is equal to the sum of the thickness of the first connecting portion 212 and the second connecting portion 222, so that the metal composite ring 20 is formed as a cylindrical structure, and the inner wall and the outer wall of the metal composite ring 20 are flush, facilitating the production of the metal composite ring 20.

[0039] Moreover, the first welding portion 211 and the second welding portion 221 in the embodiment have a larger thickness, and the larger thickness can improve the stability and the welding strength.

[0040] As one of the embodiments of the utility model, referring to the drawings, Figure 1 、 4 the inner side of the first welding portion 211 is flush with the inner side of the first connecting portion 212, the outer side of the first welding portion 211 protrudes outwardly in the radial direction from the outer side of the first connecting portion 212, the outer side of the second welding portion 221 is flush with the outer side of the second connecting portion 222, and the inner side of the second welding portion 221 protrudes inwardly in the radial direction from the inner side of the second connecting portion 222.

[0041] The inner side of the first welding portion 211 and the first connecting portion 212 in the shell metal ring 21 in the embodiment is flush, and the outer side of the first welding portion 211 protrudes from the outer side of the first connecting portion 212, so that the thickness of the first welding portion 211 is greater than that of the first connecting portion 212, a step structure is formed between the first welding portion 211 and the first connecting portion 212, similarly, a step is formed between the second welding portion 221 and the first connecting portion 212, and the directions of the two steps are opposite, so that the shell metal ring 21 and the inner container metal ring 22 are mutually fitted structures under the condition that the first connecting portion 212 and the second connecting portion 222 are mutually sleeved, the overall appearance of the metal ring can be improved, and the appearance of the vacuum cup can be improved.

[0042] Of course, it is conceivable that, in actual design, in order to further improve the integrity of the metal composite ring 20, the outer side of the first welding portion 211 and the outer side of the inner container metal ring 22 can be flush, and the inner side of the second welding portion 221 and the inner side of the shell metal ring 21 can be flush, as shown in the drawings, Figure 1 so that the metal composite ring 20 is formed as a cylindrical structure with flush inner and outer sides, facilitating production.

[0043] As one of the embodiments of the utility model, referring to the drawings, Figure 1One end of the first connecting portion 212 abuts against a portion of the second welding portion 221 protruding from the second connecting portion 222, and one end of the second connecting portion 222 abuts against a portion of the first welding portion 211 protruding from the first connecting portion 212.

[0044] In the embodiment, the inner wall and the outer wall of the metal composite ring 20 do not have obvious gaps as a whole, so that the overall appearance and strength of the metal ring are improved.

[0045] In one embodiment of the utility model, the radial thickness of the first welding portion 211 and the second welding portion 221 is between 0.5 and 2 mm. The material thickness of the welding portion is generally not less than the thickness of the inner container 12 and the outer shell 11. Since the thickness of the inner container 12 and the outer shell 11 of the vacuum cup is generally thin, the thickness of the welding portion can be slightly larger in order to ensure better welding strength. However, considering the amount of material and the weight of the vacuum cup after production, the thickness of the welding portion is generally limited to not more than 2 mm, that is, the thickness of the metal composite ring 20 is not more than 2 mm.

[0046] In the utility model, the body of the container (the cup body of the vacuum cup) can be manufactured according to the following steps in the actual production process:

[0047] First, the metal composite ring 20 is manufactured:

[0048] S1: The thicker stainless steel metal ring (the outer shell metal ring 21) and the titanium metal ring (the inner container metal ring 22) are respectively cut to remove part of the inner ring and the outer ring, as shown in the attached Figure 2 figure, so that the cut inner ring and the outer ring can reach the size of being fitted together;

[0049] S2: The stainless steel metal ring is inserted into the titanium metal ring, and the two metals are in a clamping state after being cut, and the two ends are not flush, and the inner ring and the outer ring are respectively protruding, as shown in the attached Figure 3 figure;

[0050] S3: The metal ring is heated to 600-1200°, and since the two metals are combined after being cut and closely fitted, an oxidation layer is not generated under heating, so that the two metals can be better combined;

[0051] S4: The two layers of metal rings after being heated are rolled and combined. After being rolled, the two layers of metal rings are changed from the metal ring with a shorter length and a thicker thickness to the composite metal ring with a longer length and a thinner thickness, and the two ends of the composite metal ring are both single-layer metal. After being rolled and combined at high temperature, the two layers of metal rings can be well combined into one without other connecting parts, and the integrity is better. Of course, in the actual setting, a suitable metallurgical composite layer can be arranged between the first connecting portion 212 and the second connecting portion 222 according to the characteristics of different metal materials to improve the composite strength of the outer shell metal ring 21 and the inner container metal ring 22, as shown in the attachedFigure 4 ; wherein it should be noted that in the hot roll bonding process, the first connecting part 212 is not only bonded with the second connecting part 222, but also the first connecting part 212 and the second welding part 221, the second connecting part 222 and the first welding part 211 are bonded together, which can greatly improve the overall strength;

[0052] S5: The two ends of the composite ring can be machined to have an inclined angle, which facilitates the welding of the inner container 12 and the outer shell 11 of the vacuum cup and ensures the overall appearance of the vacuum cup, as shown in the accompanying drawings Figure 1 The inner side of the first welding part 211 is formed with a bevel groove 23, which has two aspects of benefits, on the one hand, the bevel groove 23 is arranged on the inner side, which is a straight wall structure on the outer wall of the vacuum cup, which increases the overall appearance of the vacuum cup, on the other hand, the bevel groove 23 of the first welding part 211 can make the thickness of the butt joint part of the first welding part 211 and the outer shell 11 consistent (the first welding part 211 and the outer shell 11 are butt welded), so that the problem of uneven heat affecting the welding quality due to heat conduction during welding can be avoided; the outer side of the second welding part 221 is provided with a bevel groove 23, since the second welding part 221 is located at the top end of the vacuum cup, the bevel groove 23 on the second welding part 221 is formed at the end, which can form the transition of the end of the vacuum cup, and is more aesthetic and practical;

[0053] S6: The machined composite metal ring is welded with the vacuum cup, as shown in the accompanying drawings Figure 5 The bottom end of the first welding part 211 of the composite metal ring is aligned with the outer side of the top end of the outer shell 11, and after welding at the joint, the top surface of the welding ring 121 and the inner wall of the second welding part 221 are polished flat (the welding ring 121 can also play a role in pre-positioning the metal composite ring 20), and the top surface of the welding ring 121 and the inner wall of the second welding part 221 are welded and connected after polishing flat, which can form the cup body structure of the vacuum cup.

[0054] It can be seen that through the setting of the metal composite ring 20 of the utility model, when the inner container 12 and the outer shell 11 of the vacuum cup are welded and connected, the welding quality can be guaranteed (the risk of welding through is avoided), and the quality of the vacuum cup can be improved.

[0055] As one of the embodiments of the utility model, the end of the first welding part 211 and / or the end of the second welding part 221 is provided with a bevel groove 23.

[0056] The first welding part 211 and the second welding part 221 in the embodiment can be provided with the inclined groove 23, and the inclined groove 23 can be provided on the inner side or the outer side according to the requirement. Figure 1 、 5 As shown in FIG. 7, the inclined groove 23 of the first welding part 211 is provided on the inner side, and the inclined groove 23 of the second welding part 221 is provided on the outer side.

[0057] In order to improve the tightness of the combination of the shell metal ring 21 and the inner container metal ring 22, the outer wall of the first connecting part 212 and the inner hole of the second connecting part 222 are in interference fit.

[0058] The first connecting part 212 and the second connecting part 222 in the embodiment can be in interference fit through cold mounting and hot mounting when being assembled in a sleeved manner, and the interference fit mounting mode can improve the reliability of the connection of the first connecting part 212 and the second connecting part 222, and a certain pre-tightening force is formed between the first connecting part 212 and the second connecting part 222, which is helpful to resist stress deformation in the welding process.

[0059] The shell metal ring 21 and the inner container metal ring 22 are made of different materials, wherein one of the shell metal ring 21 and the inner container metal ring 22 is made of titanium metal, and the other is made of copper or aluminum or stainless steel.

[0060] Taking the application of the metal composite ring 20 to the vacuum cup as an example, the inner container 12 and the shell 11 of the vacuum cup are generally made of different materials, the inner container 12 is generally made of titanium metal, and one of the shell metal ring 21 and the inner container metal ring 22 is made of the same material as the inner container 12, as shown in FIG. 7. Figure 5 、 6 As shown in FIG. 7, the material of the inner container metal ring 22 is titanium metal, so that the inner container metal ring 22 and the inner container 12 are welded in the same material, the shell metal ring 21 is made of the same material as the shell 11, and is generally made of copper or aluminum or stainless steel, so that the amount of titanium metal can be reduced, and the production cost can be reduced. Figure 6 FIG. 7 is an enlarged view of the welding part of the second welding part 221 of the metal composite ring and the inner container 12, and a second welding point 25 is formed between the second welding part 221 and the inner container 12. Figure 7 FIG. 7 is an enlarged view of the welding part of the first welding part 211 of the metal composite ring and the shell 11, and a first welding point 24 is formed between the first welding part 211 and the shell 11.

[0061] In order to improve the integrity of the composite of the shell metal ring 21 and the inner container metal ring 22, as one of the embodiments of the utility model, the metal composite ring 20 further comprises a metallurgical composite layer (not shown in the figure), which is arranged between the first connecting part 212 and the second connecting part 222, and the first connecting part 212 and the second connecting part 222 are fixedly connected through the metallurgical composite layer. The metallurgical composite layer can improve the bonding strength and the sealing property of the combination of the shell metal ring 21 and the inner container metal ring 22, thereby improving the sealing property of the shell 11 and the inner container 12.

[0062] As one of the embodiments of the utility model, the radial thickness of the first welding part 211 and the second welding part 221 is between 0.5-2mm.

[0063] The material thickness of the welding part is generally not less than the thickness of the corresponding inner container 12 and shell 11. Since the thickness of the inner container 12 and the shell 11 of the vacuum cup is generally thin, in order to ensure better welding strength, the thickness of the welding part can be slightly larger, but considering the material consumption and the weight of the vacuum cup after production, the thickness of the welding part is generally limited to not more than 2mm, that is, the thickness of the metal composite ring 20 is not more than 2mm.

[0064] The above is only a specific embodiment of the utility model, but the protection scope of the utility model is not limited to this. Those skilled in the art should understand that the utility model includes but is not limited to the contents described in the above specific embodiment and the drawings. Any modification without deviating from the function and structural principle of the utility model will be included in the scope of claims.

Claims

1. A metal composite ring comprising an outer shell metal ring (21) and an inner liner metal ring (22), said outer shell metal ring (21) and inner liner metal ring (22) being made of different metal materials, characterized in that, The shell metal ring (21) comprises a ring-shaped first welding portion (211) and a ring-shaped first connecting portion (212) protruding from one end surface of the first welding portion (211), the inner container metal ring (22) comprises a ring-shaped second welding portion (221) and a ring-shaped second connecting portion (222) protruding from one end surface of the second welding portion (221), the first welding portion (211) and the second welding portion (221) are oppositely spaced, the first connecting portion (212) and the second connecting portion (222) are located between the first welding portion (211) and the second welding portion (221), the first connecting portion (212) and the second connecting portion (222) are sleeved and fixedly connected with each other, one end of the first connecting portion (212) abuts against and is fixedly connected with the end portion of the second welding portion (221), and one end of the second connecting portion (222) abuts against and is fixedly connected with the end portion of the first welding portion (211).

2. The metal composite ring of claim 1 wherein, The radial thickness of the first welding portion (211) is greater than the radial thickness of the first connecting portion (212), and the radial thickness of the second welding portion (221) is greater than the radial thickness of the second connecting portion (222).

3. The metal composite ring of claim 2 wherein, The inner side surface of the first welding portion (211) is flush with the inner side surface of the first connecting portion (212), the outer side surface of the first welding portion (211) protrudes outward in the radial direction from the outer side surface of the first connecting portion (212), the outer side surface of the second welding portion (221) is flush with the outer side surface of the second connecting portion (222), and the inner side surface of the second welding portion (221) protrudes inward in the radial direction from the inner side surface of the second connecting portion (222).

4. The metal composite ring of claim 3 wherein, One end of the first connecting portion (212) abuts against the part of the second welding portion (221) protruding from the second connecting portion (222), and one end of the second connecting portion (222) abuts against the part of the first welding portion (211) protruding from the first connecting portion (212).

5. The metal composite ring of any one of claims 1 to 4, wherein, The end portion of the first welding portion (211) and / or the end portion of the second welding portion (221) is provided with a beveled groove (23).

6. The metal composite ring of any one of claims 1 to 4, wherein, The outer wall of the first connecting portion (212) and the inner hole of the second connecting portion (222) are in interference fit.

7. The metal composite ring of any one of claims 1 to 4, wherein, One of the shell metal ring (21) and the inner container metal ring (22) is made of titanium metal, and the other is made of copper or aluminum or stainless steel.

8. The metal composite ring of any one of claims 1 to 4, wherein, The shell metal ring (21) and the inner container metal ring (22) are heated and roll-pressed to be integrated.

9. The metal composite ring of any one of claims 1 to 4, wherein, The metal composite ring (20) further comprises a metallurgical composite layer arranged between the first connecting portion (212) and the second connecting portion (222), and the first connecting portion (212) and the second connecting portion (222) are fixedly connected through the metallurgical composite layer.

10. The metal composite ring of any one of claims 1 to 4, wherein, The radial thickness of the first welding portion (211) and the second welding portion (221) is between 0.5 and 2 mm.

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