Partially composite thin-walled metal product composite device and method and its products and applications

Abstract

The present invention discloses a device and method for partially composite thin-walled metal products, as well as products and applications thereof, and belongs to the field of metal product manufacturing. The device includes an inner mold, an outer mold, an inner mold fixing device, an outer mold fixing device, an upper work surface, a lower work surface, a heater and a force-applying mechanism. The areas to be composited of the metal inner part and the metal outer part are subjected to softening annealing treatment and surface treatment to be composited, the metal inner part and the metal outer part are combined to form a combined area to be composited, and the heated or unheated combined area to be composited is pressed and composited to obtain a partially composite thin-walled metal product. The device of the present invention has a simple structure, low manufacturing cost, and is convenient for automated production; the pressing composite method is used instead of the traditional welding method, with a short process flow and high yield, no need for solder or intermediate layer, cost saving, and environmental protection; the partially composite thin-walled metal product has good quality and excellent performance, and the composite interface bonding strength is high and the sealing is good. It is particularly suitable for the efficient and low-cost composite of the mouth of a metal thermos cup.

Description

Technical Field

[0001] The present invention belongs to the field of metal product manufacturing, and specifically relates to a partially composite thin-walled metal product composite device and method, and its products and applications, and is particularly suitable for short-process and low-cost composite processing of metal insulation cup mouths. Background Art

[0002] Thin-walled annular or cylindrical metal layered composite materials obtained by partial compounding of metal outer parts and metal inner parts have a wide range of uses, and metal thermos cups are a typical application example. Metal thermos cups are usually composed of a metal outer cup (i.e., a metal outer part), a metal inner cup (i.e., a metal inner part), and a vacuum layer between the metal outer cup and the metal inner cup, wherein the role of the vacuum layer is to use the characteristics of vacuum to delay heat dissipation to achieve the purpose of heat insulation. The metallurgical bonding quality of the composite cup mouth obtained by compounding the metal outer cup and the metal inner cup at the cup mouth (i.e., partial compounding) is the key factor that determines the bonding strength and sealing of the composite cup mouth of the metal thermos cup, which ultimately affects the mechanical properties of the metal thermos cup and the vacuum degree of the vacuum layer. In addition, the composite part is at the cup mouth, which is in direct contact with the human body and requires a certain degree of biosafety.

[0003] At present, whether it is a metal thermos cup made of the same metal or a metal thermos cup made of dissimilar metals, the cup mouth is all welded together. Since the wall thickness of the metal inner cup and the metal outer cup of the metal thermos cup is usually thin (generally around 0.4mm), welding is difficult, the bonding area is small, and problems such as penetration and thinning are prone to occur during the welding process, all of which affect the bonding strength and sealing of the metal thermos cup composite cup mouth. In addition, when soldering the metal inner cup and the metal outer cup mouth, the solder used usually contains a lot of heavy metal elements. During the long-term use of the metal thermos cup, the heavy metals in the composite cup mouth will cause certain harm to human health. In addition, welding between dissimilar metals, especially for welding between dissimilar metals with large differences in properties between the metals to be welded and at least one of the metals is highly chemically active, such as welding between titanium and stainless steel, often brings about problems such as metallurgical incompatibility, residual stress, thermal stress and the formation of intermetallic compounds, which can easily lead to welding defects such as cracks, pores, embrittlement, and discoloration in the weld.

[0004] In summary, existing partially composite thin-walled annular or cylindrical metal layered composite materials, represented by metal thermos cups, especially those composed of dissimilar metals, have problems with the welding composite method for the cup mouth, which is difficult to weld and prone to various welding defects. The composite cup mouth has a small bonding area, and the bonding strength and sealing performance cannot meet the requirements. This leads to unsatisfactory mechanical properties and thermal insulation effects of the metal thermos cup, and poses safety risks to human health. Therefore, there is an urgent need to develop a new technology for partially composite thin-walled metal products to achieve high-quality metallurgical bonding of thin-walled annular or cylindrical metal layered composite materials in the local area, so as to obtain high-performance partially composite thin-walled annular or cylindrical metal layered composite materials. Summary of the Invention

[0005] The purpose of the present invention is to provide a device and method for locally composite thin-walled metal products, as well as their products and applications, particularly suitable for short-process, low-cost composite processing of metal thermos cup rims. By using a pressing composite method, the metallurgical bonding of the metal inner and outer parts of the thin-walled metal product in the region to be composited is achieved. This effectively addresses the problems that exist in the localized welding composite of traditional locally composite thin-walled metal products, such as those on metal thermos cup rims, particularly the cracking, porosity, and discoloration caused by welding metal thermos cup rims composed of dissimilar metals. This enables low-cost, continuous, automated production of thin-walled metal products with high bonding strength or sealing properties in the locally composited region.

[0006] According to a first aspect of the technical solution of the present invention, there is provided a partially composite thin-walled metal product composite device, comprising: an inner mold, an outer mold, an inner mold fixing device, an outer mold fixing device, an upper working table, a lower working table, a heater, and a force applying mechanism;

[0007] The inner mold and the outer mold are concentrically aligned to form a combined mold. The inner mold is fixed by the inner mold fixing device and mounted on the upper work surface. The outer mold is fixed by the outer mold fixing device and mounted on the lower work surface. The upper work surface and the lower work surface are respectively mounted on the upper and lower ends of the force-applying mechanism. The force-applying mechanism is used to control the inner mold or the outer mold to perform axial reciprocating motion and provide a combined axial and radial pressing force to the combined area to be composited consisting of the area to be composited of the metal inner part and the metal outer part.

[0008] The heater is arranged around the outer mold or the inner mold or embedded in the outer mold or the inner mold, and is used to heat the outer mold or the inner mold online or offline;

[0009] A through hole with a diameter larger than the outer diameter of the metal outer part is opened at the corresponding position of the lower working table and the inner surface of the outer mold, which serves as a channel for feeding the combined area to be composited and taking out the thin-walled metal product after local pressing and composite.

[0010] Furthermore, the inner mold and the outer mold are at least one of an integral structure mold or a combined structure mold, and the combined structure mold can be opened and closed online.

[0011] Furthermore, the inner mold includes a retractable core-pulling mechanism; and the outer mold is a through-hole mold.

[0012] Furthermore, the heating method of the heater is at least one of induction heating, laser heating, flame heating or resistance heating;

[0013] Wherein, at least one of the inner mold or the outer mold is embedded with a resistance wire or a silicon carbon rod.

[0014] Furthermore, the partially composite thin-walled metal product composite device includes a clamping device, which is installed below the outer mold and passes through the lower work table to feed the combined area to be composited into the outer mold and take out the thin-walled metal product after partial pressing and composite.

[0015] According to a second aspect of the technical solution of the present invention, a method for partially composite thin-walled metal products is provided. The method is based on the apparatus for partially composite thin-walled metal products according to any of the above aspects and comprises the following steps:

[0016] Step 1: performing a softening annealing treatment on the areas to be composited of the metal inner part and the metal outer part;

[0017] Step 2: performing online or offline surface treatment on the outer surface of the metal inner part and the inner surface of the metal outer part to be composited by at least one of a chemical method, a physical method, or a mechanical method to obtain the outer surface and the inner surface to be composited with desired hardness and roughness;

[0018] Step 3: placing the metal inner part concentrically inside the metal outer part so that the outer surface to be composited and the inner surface to be composited correspond to each other and fit together, thereby obtaining a composite product having the composite composite area;

[0019] Step 4: The combined area to be composited, the outer mold, or the inner mold is not heated or is heated using a heater, and then the combined area to be composited is placed into the outer mold; the heating is online heating or offline heating, and the heating method is at least one of resistance heating, induction heating, flame heating, or laser heating, with a heating temperature of 100-1000° C. and a heating time of 1-300 seconds; or at least one of the inner mold or the outer mold is heated using the embedded resistance wire or the silicon carbon rod, and the heating temperature is 100-1000° C.;

[0020] Step 5: Under the action of the force-applying mechanism, the combined area to be composited is pressed and composited to achieve a highly sealed and strongly metallurgical bond between the outer surface to be composited and the inner surface to be composited, thereby obtaining a local composite area with a composite interface; ultrasonic assistance may or may not be applied during the pressing and composite process;

[0021] Step 6: After the local composite area is separated from the inner mold and the outer mold and demolded, a high-quality and high-performance thin-walled metal product with local composite is obtained.

[0022] Furthermore, in step 4, the combined product is clamped and conveyed by the clamping device, and the combined region to be composited is conveyed into the outer mold, and the outer surface of the combined region to be composited is closely fitted with the inner surface of the outer mold;

[0023] Wherein, step 4 further includes: the inner mold begins to enter the combined product in a contracted state, and when the inner mold enters the position of the combined area to be composited, it changes to an extended state, so that the outer surface of the inner mold is tightly fitted with the inner surface of the combined area to be composited, and then the inner mold presses and composites the combined area to be composited during the upward movement, so that the outer surface to be composited and the inner surface to be composited are highly sealed and strongly metallurgically bonded to obtain the local composite area. After the pressing and composite is completed, the inner mold enters a contracted state again to realize demolding of the inner mold and the local composite area;

[0024] The pressing and compounding deformation is 20%-80%, and the pressing and compounding time is 1-60s.

[0025] Furthermore, at least one of the metal inner part or the metal outer part includes the area to be composited and the non-composite area, and the materials of the area to be composited and the non-composite area are the same metal material or different metal materials, and the metal material is at least one of a single metal material, a reinforced metal matrix composite material or a metal layered composite material.

[0026] Furthermore, the area to be composited and the non-composite area of ​​the metal inner part are an integral structure or a combined structure, and the area to be composited and the non-composite area of ​​the metal outer part are an integral structure or a combined structure, and the combined structure is connected together by welding or composite means; the non-composite area of ​​the metal inner part or the metal outer part has been subjected to crystallization treatment or coloring treatment, or has not been subjected to crystallization treatment or coloring treatment; the areas to be composited of the metal inner part and the metal outer part have not been subjected to crystallization treatment and coloring treatment.

[0027] According to a third aspect of the technical solution of the present invention, there is provided a partially composite thin-walled metal product, wherein the partially composite thin-walled metal product is manufactured by the composite method according to any one of the above aspects.

[0028] According to a fourth aspect of the technical solution of the present invention, a metal thermos cup is provided, wherein the mouth of the metal thermos cup is made of the partially composite thin-walled metal product described in the above aspects.

[0029] The beneficial effects of the present invention are:

[0030] (1) The composite device of the present invention has a simple structure, convenient operation, high composite efficiency, low manufacturing cost, and small footprint, and is convenient for realizing continuous and automated production of partially composite thin-walled annular or cylindrical metal layered composite products.

[0031] (2) The traditional welding method is replaced by a method of pressing and compounding the combined area to be compounded, that is, by designing the structure of the inner mold and the outer mold, the combined area to be compounded is pressed and compounded only by the cooperation of the inner mold and the outer mold, thereby achieving a strong metallurgical bond between the inner surface to be compounded and the outer surface to be compounded, and the compounding area has a large bonding area, high bonding strength, good sealing, good surface quality, and a short process flow; the compounding process does not require solder or an intermediate layer, saving material cost and processing cost; in addition, it has the advantages of high yield rate and green environmental protection. Therefore, the compounding method of the present invention solves the problems of low bonding quality, easy cracking and discoloration in the local welding compounding of traditional thin-walled annular or cylindrical metal layered composite materials. It is particularly suitable for the short-process and low-cost composite processing of the mouth of a metal thermos cup, and can effectively solve the problem that the mouth of a metal thermos cup composed of dissimilar metals is difficult to directly weld with high quality.

[0032] (3) The partially composite thin-walled annular or cylindrical metal layered composite material products produced by the present invention have good quality and excellent performance, high composite interface bonding strength and good sealing; the cup mouth of the metal insulation cup has high bonding strength, good surface quality, good sealing, no discoloration, long vacuum insulation time, good insulation effect, and is safe and healthy to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions in the embodiments or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0034] Figure 1 A flow chart of the method for partially compositing thin-walled metal products of the present invention;

[0035] Figure 2 A schematic diagram of a partially composite thin-walled metal product composite device according to the present invention;

[0036] Among them, 1-force applying mechanism; 2-upper working table; 3-inner mold fixing device; 4-inner mold; 5-heater; 6-outer mold fixing device; 7-outer mold; 8-metal inner part; 9-metal outer part; 10-lower working table. DETAILED DESCRIPTION

[0037] The following is combined with Figure 1 and attached Figure 2 , and specific embodiments further illustrate the present invention in detail, which should not be understood as limiting the scope of protection of the present invention. Professional and technical personnel in this field can make non-essential improvements and adjustments based on the contents of the present invention.

[0038] The technical solution of the present invention provides a partially composite thin-walled metal product and its composite device and method, the specific process is as follows Figure 1 As shown, the schematic diagram of the local composite thin-walled metal product composite device is as follows Figure 2 shown.

[0039] The partially composite thin-walled metal product composite device comprises a force applying mechanism 1, an upper working table 2, an inner mold fixing device 3, an inner mold 4, a heater 5, an outer mold fixing device 6, an outer mold 7, an inner metal part 8, an outer metal part 9 and a lower working table 10;

[0040] Among them, the inner mold 4 and the outer mold 7 are concentrically aligned to form a combined mold. The inner mold 4 is fixed by the inner mold fixing device 3 and installed on the upper work table 2. The outer mold 7 is fixed by the outer mold fixing device 6 and installed on the lower work table 10. The upper work table 2 and the lower work table 10 are respectively installed on the upper and lower ends of the force-applying mechanism 1; the outer mold 7 is a through-hole mold; the force-applying mechanism 1 is used to control the inner mold 4 or the outer mold 7 to perform axial reciprocating motion and provide axial and radial combined pressure to the combined composite area composed of the metal inner part 8 and the metal outer part 9. force; the heater 5 is arranged around the outer mold 7 or the inner mold 4 or embedded in the outer mold 7 or the inner mold 4, and is used to heat the outer mold 7 or the inner mold 4 online or offline. The heating method of the heater 5 is at least one of induction heating, laser heating, flame heating or resistance heating; a through hole with a diameter greater than the outer diameter of the metal outer part 9 is opened at a corresponding position of the lower work table 10 and the inner surface of the outer mold 7. The through hole is a channel for feeding the combined area to be composited composed of the metal inner part 8 and the metal outer part 9 and for taking out the thin-walled metal product after local pressing and composite.

[0041] In a preferred embodiment, the inner mold 4 and the outer mold 7 are at least one of an integral structure mold or a combined structure mold, and the combined structure mold can be opened and closed online.

[0042] In a preferred embodiment, the inner mold 4 includes a retractable core-pulling mechanism.

[0043] In a preferred embodiment, at least one of the inner mold 4 or the outer mold 7 is embedded with a resistance wire or a silicon carbon rod.

[0044] In a preferred embodiment, the locally composite thin-walled metal product composite device includes a clamping device, which is installed below the outer mold 7 and passes through the lower work table to feed the combined area to be composited into the outer mold 7 and to take out the thin-walled metal product after local pressing and composite.

[0045] The method for partially cladding thin-walled metal products comprises the following steps:

[0046] Step 101: performing a softening annealing treatment on the areas to be composited of the metal inner part 8 and the metal outer part 9;

[0047] Step 102: performing online or offline surface treatment on the outer surface of the metal inner part 8 and the inner surface of the metal outer part 9 to be composited by at least one of a chemical method, a physical method, or a mechanical method to obtain the outer surface and the inner surface to be composited with the desired hardness and roughness;

[0048] Step 103: placing the metal inner part 8 concentrically inside the metal outer part 9 so that the outer surface to be composited and the inner surface to be composited correspond to each other and fit together, thereby obtaining a composite product having the composite composite area;

[0049] Step 104: The combined area to be composited, the outer mold 7, or the inner mold 4 is not heated or is heated using the heater 5, and then the combined area to be composited is placed into the outer mold 7; the heating is performed online or offline, and the heating method is at least one of resistance heating, induction heating, flame heating, or laser heating, with a heating temperature of 100-1000° C. and a heating time of 1-300 seconds; or at least one of the inner mold 4 or the outer mold 7 is heated using the embedded resistance wire or the silicon carbon rod, with a heating temperature of 100-1000° C.;

[0050] Step 105: Under the action of the force applying mechanism 1, the combined area to be composited is pressed and composited to achieve a highly sealed and strong metallurgical bond between the outer surface to be composited and the inner surface to be composited, thereby obtaining a local composite area with a composite interface; ultrasonic assistance may or may not be applied during the pressing and composite process;

[0051] Step 106: After the local composite area is separated from the inner mold 4 and the outer mold 7 and demolded, the high-quality and high-performance thin-walled metal product with local composite is obtained.

[0052] In a preferred embodiment, the combined product is clamped and conveyed by the clamping device, and the combined area to be composited is conveyed into the outer mold 7, and the outer surface of the combined area to be composited is tightly fitted with the inner surface of the outer mold 7. Then the inner mold 4 begins to enter the combined product in a contracted state. When the inner mold 4 enters the position of the combined area to be composited, it changes to an extended state, so that the outer surface of the inner mold 4 is tightly fitted with the inner surface of the combined area to be composited. Then, the inner mold 4 presses and composites the combined area to be composited during the upward movement, so that the outer surface to be composited and the inner surface to be composited achieve a highly sealed and strongly metallurgical bond to obtain the local composite area. After the pressing and composite is completed, the inner mold 4 enters a contracted state again to realize the demolding of the inner mold 4 and the local composite area; the pressing and composite deformation amount is 20%-80%, and the pressing and composite time is 1-60s.

[0053] In a preferred embodiment, at least one of the metal inner part 8 or the metal outer part 9 includes the area to be composited and the non-composite area, and the materials of the area to be composited and the non-composite area are the same metal material or different metal materials, and the metal material is at least one of a single metal material, a reinforced metal matrix composite material or a metal layered composite material.

[0054] In a preferred embodiment, the area to be composited and the non-composite area of ​​the metal inner part 8 are an integral structure or a combined structure, and the area to be composited and the non-composite area of ​​the metal outer part 9 are an integral structure or a combined structure, and the combined structure is connected together by welding or composite means; the non-composite area of ​​the metal inner part 8 or the metal outer part 9 is crystallized or colored, or is not crystallized or colored; the area to be composited of the metal inner part 8 and the metal outer part 9 is not crystallized or colored.

[0055] Example 1:

[0056] Pure titanium / 304 stainless steel insulation cup mouth composite

[0057] The rims of the pure titanium inner cup and the 304 stainless steel outer cup that have not been crystallized and colored are induction heated at 750°C and 1050°C for 2 minutes respectively to complete the softening annealing treatment; the oxide film on the rims of the pure titanium inner cup and the rims of the 304 stainless steel outer cup is removed by pickling, the outer surface of the rim of the pure titanium inner cup is polished with a diamond cup grinding wheel, and the inner surface of the rim of the 304 stainless steel outer cup is polished with a diamond grinding rod; the polished pure titanium inner cup is concentrically placed in the 304 stainless steel outer cup, and the rims of the pure titanium inner cup and the rims of the 304 stainless steel outer cup are aligned to obtain a combined rim; the combined rim is induction heated at 350°C for 15 seconds, and the combined mold (inner mold 4 and outer mold 7) is heated by an embedded resistance wire to maintain 3 50℃; the heated combined cup mouth is sent into the outer mold 7 through the clamping device, and the outer surface of the combined cup mouth is tightly fitted with the inner surface of the outer mold 7. Then the inner mold 4 starts to enter the combined cup mouth position in a contracted state and then changes to an extended state, so that the outer surface of the inner mold 4 is tightly fitted with the inner surface of the combined cup mouth. Then the inner mold 4 presses and compounds the combined cup mouth during the upward movement, with a pressing and compounding deformation of 40% and a pressing and compounding time of 5s, so that the surface to be compounded of the combined cup mouth achieves high sealing and strong metallurgical bonding to obtain a composite cup mouth. After the pressing and compounding is completed, the inner mold 4 enters the contracted state again, and the composite cup mouth is separated and demolded from the inner mold 4 and the outer mold 7, and finally the composite of the pure titanium / 304 stainless steel insulation cup mouth is completed.

[0058] Experimental verification shows that the pure titanium / 304 stainless steel thermos cup has high bonding strength, good surface quality, good sealing, no discoloration, long vacuum insulation time, good insulation effect, and is safe and healthy to use.

[0059] Example 2:

[0060] TC4 titanium alloy / 316 stainless steel ring local composite

[0061] The areas to be composited of the TC4 titanium alloy inner ring part and the 316 stainless steel outer ring part that have not been crystallized and colored are subjected to induction heating at 800°C and 1050°C for 2 minutes, respectively, to complete softening annealing treatment; the oxide films of the areas to be composited of the TC4 titanium alloy inner ring part and the 316 stainless steel outer ring part are removed by pickling, the outer surface of the areas to be composited of the TC4 titanium alloy inner ring part is polished with a diamond cup grinder, and the inner surface of the areas to be composited of the 316 stainless steel outer ring part is polished with a diamond grinding rod; the polished TC4 titanium alloy inner ring part is concentrically placed in the 316 stainless steel outer ring part, so that the outer surface to be composited of the TC4 titanium alloy inner ring part and the inner surface to be composited of the 316 stainless steel outer ring part correspond to each other and fit together to obtain a combined ring part; the combined areas to be composited of the combined ring part are heated in a 400°C resistance furnace for 1 minute, and the combined mold is assembled. (Inner mold 4 and outer mold 7) are heated by embedded resistance wire to maintain 400℃; the heated combined area to be composited is sent into outer mold 7 through clamping device, and the outer surface of the combined area to be composited is tightly fitted with the inner surface of outer mold 7; then inner mold 4 begins to enter the combined annular part in a contracted state, and after reaching the position of the combined area to be composited, it changes to an extended state, so that the outer surface of inner mold 4 is tightly fitted with the inner surface of the combined area to be composited; then inner mold 4 presses and composites the combined area to be composited during the upward movement, with a pressing and composite deformation of 40% and a pressing and composite time of 5s, so that the surface to be composited of the combined annular part achieves high sealing and strong metallurgical bonding, and a partially composited annular part is obtained; after the pressing and composite is completed, inner mold 4 enters a contracted state again, and the partially composited annular part is separated and demolded from inner mold 4 and outer mold 7, and finally the partial composite of TC4 titanium alloy / 316 stainless steel annular part is completed.

[0062] Experimental verification shows that the TC4 titanium alloy / 316 stainless steel ring has good quality, excellent performance, high composite interface bonding strength and good sealing.

[0063] Example 3:

[0064] Titanium / steel layered composite material / 304 stainless steel metal cylindrical parts partial composite

[0065] The areas to be composited of the titanium / steel layered composite inner cylindrical part and the 304 stainless steel outer cylindrical part that have not been crystallized and colored are subjected to induction heating at 850°C and 1050°C for 2 minutes, respectively, to complete softening annealing treatment; the oxide films in the areas to be composited of the titanium / steel layered composite inner cylindrical part and the 304 stainless steel outer cylindrical part are removed by pickling, the outer surface of the areas to be composited of the titanium / steel layered composite inner cylindrical part is polished with a diamond cup grinding wheel, and the inner surface of the areas to be composited of the 304 stainless steel outer cylindrical part is polished with a diamond grinding rod; the polished titanium / steel layered composite inner cylindrical part is concentrically placed in the 304 stainless steel outer cylindrical part, so that the outer surface to be composited of the inner cylindrical part and the inner surface to be composited of the outer cylindrical part correspond to each other and fit together, thereby obtaining a combined cylindrical part; the combined areas to be composited of the combined cylindrical part are subjected to induction heating at 500°C for 30 seconds, and the combined mold (inner mold 4 and outer mold 7) are heated by an embedded resistance wire to maintain 500°C; the heated combined area to be composited is sent into the outer mold 7 through a clamping device, and the outer surface of the combined area to be composited is tightly fitted with the inner surface of the outer mold 7, and then the inner mold 4 begins to enter the combined cylindrical part in a contracted state, and after reaching the position of the combined area to be composited, it is transformed into an extended state, so that the outer surface of the inner mold 4 is tightly fitted with the inner surface of the combined area to be composited, and then the inner mold 4 presses and composites the combined area to be composited during the upward movement, with a pressing and composite deformation of 35% and a pressing and composite time of 10s, so that the surface of the combined cylindrical part to be composited achieves high sealing and strong metallurgical bonding, and a partially composited cylindrical part is obtained. After the pressing and composite is completed, the inner mold 4 enters a contracted state again, and the locally composited cylindrical part is separated and demoulded from the inner mold 4 and the outer mold 7, and finally the local composite of the titanium / steel layered composite material / 304 stainless steel metal cylindrical part is completed.

[0066] Experimental verification shows that the titanium / steel layered composite material / 304 stainless steel metal cylindrical part has good quality and excellent performance, and has high composite interface bonding strength and good sealing.

[0067] In summary, the present invention discloses a partially composited thin-walled metal product and its composite device and method. The composite method of the present invention solves the problems of low bonding quality, easy cracking and discoloration in the partial welding composite of traditional partially composite thin-walled annular or cylindrical metal layered composite materials. It is particularly suitable for the short-process and low-cost composite processing of the mouth of a metal insulation cup, and can effectively solve the problem that the mouth of a metal insulation cup composed of dissimilar metals is difficult to directly weld with high quality. The present invention replaces the traditional welding method with a pressing composite method to achieve a strong metallurgical bond of the surface to be composited of the thin-walled metal product. The composite area has a large bonding area, high bonding strength, good sealing, good surface quality, and a short process flow. The composite process does not require solder or an intermediate layer, saving material and processing costs. In addition, it has the advantages of high yield rate and environmental protection. The partially composited thin-walled metal product produced by the present invention has good quality and excellent performance, high composite interface bonding strength and good sealing; the mouth of the metal insulation cup has high bonding strength, good surface quality, good sealing, no discoloration, long vacuum insulation time, good insulation effect, and is safe and healthy to use.

[0068] The above are merely specific embodiments of the present invention, but the present invention is not limited thereto. Any equivalent variations or substitutions of the features of the present invention that can be conceived by a person skilled in the art are within the scope of protection of the present invention. The scope of protection of the present invention is based on the scope defined in the claims.

Claims

1. A partially composite thin-walled metal product composite device, characterized in that: include: Inner mold, outer mold, inner mold fixing device, outer mold fixing device, upper work surface, lower work surface, heater, force applying mechanism; The inner mold and the outer mold are concentrically aligned to form a combined mold; the inner mold is fixed by the inner mold fixing device and mounted on the upper work surface; the outer mold is fixed by the outer mold fixing device and mounted on the lower work surface; the upper work surface and the lower work surface are respectively mounted on the upper and lower ends of the force applying mechanism; the heater is arranged around the outer mold or the inner mold or embedded in the outer mold or the inner mold; A through hole having a diameter larger than the outer diameter of the metal outer part is provided at a position corresponding to the inner surface of the lower working table and the outer mold, serving as a passage for feeding the combined area to be composited consisting of the metal inner part and the area to be composited of the metal outer part and for taking out the thin-walled metal product after partial pressing and composite. wherein the metal inner part is concentrically placed inside the metal outer part so that the outer surface of the metal inner part to be composited and the inner surface of the metal outer part to be composited correspond to each other and fit together, thereby obtaining a composite product having the composite composite area; Among them, the inner mold begins to enter the combined product in a contracted state, and when the inner mold enters the position of the combined area to be composited, it changes to an extended state, so that the outer surface of the inner mold is tightly fitted with the inner surface of the combined area to be composited, and then the inner mold presses and composites the combined area to be composited during the upward movement, so that the outer surface to be composited and the inner surface to be composited achieve a high sealing and strong metallurgical bond to obtain the local composite area. After the pressing and composite is completed, the inner mold enters a contracted state again to achieve demolding of the inner mold and the local composite area.

2. The partially composite thin-walled metal product composite device according to claim 1, characterized in that: The inner mold includes a retractable core-pulling mechanism; the outer mold is a through-hole mold.

3. The partially composite thin-walled metal product composite device according to claim 1, characterized in that: The heating method of the heater is at least one of induction heating, laser heating, flame heating or resistance heating; Wherein, at least one of the inner mold or the outer mold is embedded with a resistance wire or a silicon carbon rod.

4. The partially composite thin-walled metal product composite device according to claim 1, characterized in that: The locally composite thin-walled metal product composite device includes a clamping device, which is installed below the outer mold and passes through the lower work table to feed the combined area to be composited into the outer mold and take out the thin-walled metal product after local pressing and composite.

5. A method for partially composite thin-walled metal products, characterized in that: The method for partially composite thin-walled metal products is operated based on the apparatus for partially composite thin-walled metal products according to claim 4, and comprises the following steps: Step 1: performing a softening annealing treatment on the areas to be composited of the metal inner part and the metal outer part; Step 2: performing surface treatment on the outer surface of the metal inner part and the inner surface of the metal outer part to be composited, so as to obtain the outer surface and the inner surface to be composited with desired hardness and roughness; Step 3: placing the metal inner part concentrically within the metal outer part so that the outer surface of the metal inner part to be composited and the inner surface of the metal outer part to be composited correspond to each other and fit together, thereby obtaining a composite product having the composite composite area; Step 4: The combined area to be composited, the outer mold or the inner mold is not heated or heated with a heater, and then the combined area to be composited is placed into the outer mold; Step 5: Under the action of the force-applying mechanism, the combined area to be composited is pressed and composited to achieve a highly sealed and strongly metallurgical bond between the outer surface to be composited and the inner surface to be composited, thereby obtaining a local composite area with a composite interface; ultrasonic assistance may or may not be applied during the pressing and composite process; Step 6: After the local composite area is separated from the inner mold and the outer mold and demolded, a high-quality and high-performance thin-walled metal product with local composite is obtained.

6. A method for partially compositing thin-walled metal products as claimed in claim 5, characterized in that: In step 4, the combined product is clamped and conveyed by the clamping device, and the combined region to be composited is conveyed into the outer mold, and the outer surface of the combined region to be composited is closely fitted with the inner surface of the outer mold; Wherein, step 4 further includes: the inner mold begins to enter the combined product in a contracted state, and when the inner mold enters the position of the combined area to be composited, it changes to an extended state, so that the outer surface of the inner mold is tightly fitted with the inner surface of the combined area to be composited, and then the inner mold presses and composites the combined area to be composited during the upward movement, so that the outer surface to be composited and the inner surface to be composited are highly sealed and strongly metallurgically bonded to obtain the local composite area. After the pressing and composite is completed, the inner mold enters a contracted state again to realize demolding of the inner mold and the local composite area; Among them, the pressing and compounding deformation is 20%-80%, and the pressing and compounding time is 1-60s.

7. A method for partially compositing thin-walled metal products as claimed in claim 5, characterized in that: At least one of the metal inner part or the metal outer part includes the area to be composited and the non-composite area, and the materials of the area to be composited and the non-composite area are the same metal material or different metal materials, and the metal material is at least one of a single metal material, a reinforced metal matrix composite material or a metal layered composite material; the area to be composited and the non-composite area of ​​the metal inner part are an integral structure or a combined structure, and the area to be composited and the non-composite area of ​​the metal outer part are an integral structure or a combined structure, and the combined structure is connected together by welding or a composite method; the non-composite area of ​​the metal inner part or the metal outer part has been subjected to crystallization treatment or coloring treatment, or has not been subjected to crystallization treatment or coloring treatment; the areas to be composited of the metal inner part and the metal outer part have not been subjected to crystallization treatment and coloring treatment.

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