A method for processing a titanium liner thermos cup body

Abstract

The present invention discloses a method for processing a titanium-lined thermos cup body, comprising the following steps: a. processing the stainless steel shell; b. processing the titanium rim; c. processing the titanium liner body; d. processing the titanium-steel composite shell of the outer shell; and e. assembling the titanium liner and outer shell. A titanium-lined thermos cup body manufactured using the method described herein can avoid the harmful effects of heavy metals in brazing on the human body. The area where the lips come into contact with water when drinking is made of titanium, making it safer than stainless steel. The cup body also offers excellent drop resistance.

Description

Technical Field

[0001] The invention relates to a method for processing a titanium liner thermos cup body. Background Art

[0002] Existing thermos bottles are typically made of double-layer stainless steel with a vacuum layer, topped with a tightly sealed insulation lid. The vacuum layer slows down heat dissipation, thereby maintaining heat. However, the stainless steel inner liner of existing thermos bottles is often susceptible to heavy metal precipitation, especially when used with beverages such as juice and carbonated drinks. This can affect the taste of the beverage over time and easily lead to spoilage. The beverage can also gradually corrode the stainless steel, causing damage to the inner liner and shortening the lifespan of the thermos.

[0003] In response to this, various titanium thermos cups have been developed. For example, Chinese utility model patent CN212221148U discloses a "Thermal Insulation Container," which includes a titanium liner and a stainless steel outer shell. A vacuum insulation chamber is formed between the two, and a welding cavity is formed at the upper openings of the liner and outer shell. A strong solder is used to vacuum-braze the two shells. This insulated container replaces the traditional stainless steel liner with a titanium liner, solving the problem of acidic substances causing heavy metal migration within the stainless steel. However, due to the different melting points of titanium and stainless steel, welding titanium and stainless steel requires the special solder described therein, and these solders also contain heavy metals such as silver and copper. The welding point between the titanium material and the stainless steel shell of the thermal insulation container in this utility model is at the mouth of the container. During testing, it was found that the heavy metals in the solder tended to migrate into the inner liner, which is not conducive to long-term use. Moreover, the special solder described therein is in powder form, which is difficult to operate during welding operations. The solder is easily filled unevenly, with overflow in places where there is more material and insufficient filling in places where there is less material. The welds are uneven or even missing, resulting in a lack of vacuum and poor firmness after welding. In particular, the soldering point is arranged at the upper end of the cup mouth, which will come into contact with the human body. The components in the solder contain a variety of heavy metals, which is not safe enough. Summary of the Invention

[0004] The purpose of the present invention is to provide a method for processing a titanium liner thermos cup body. The titanium liner thermos cup body manufactured using this method can avoid the harm of heavy metals in brazing to the human body; the part that the lips touch when drinking water is made of titanium material, which is safer than stainless steel; and the cup body has good anti-fall performance.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] A method for processing a titanium liner thermos cup body comprises the following steps:

[0007] a. Processing of stainless steel shell:

[0008] a1. Take the stainless steel round tube of required specifications

[0009] a2 water expansion: water expansion equipment is used to form a stainless steel shell body embryo, the stainless steel shell body embryo includes a stainless steel shell body head, shoulders and body;

[0010] a3 cutting: The head of the stainless steel shell body embryo is removed by a cutting device (laser is used in this solution) to form the mouth of the stainless steel shell body embryo;

[0011] a4. Reverse stretching: A downwardly concave groove is formed between the mouth and shoulder of the stainless steel shell body by reverse stretching;

[0012] a5. Flat mouth and flat bottom: According to the required specifications, the upper and lower ports of the stainless steel shell body are cut to form a stainless steel shell body of the required height, leaving the inner side of the ring groove reserved for processing the inner side of the fixed portion;

[0013] b. Processing of titanium ring:

[0014] b1. Take the required specifications of titanium tube;

[0015] b2 cutting pipe: cutting the desired height size of the titanium material ring blank by cutting device;

[0016] b3. Rounding: The titanium ring blank is reshaped to correct any out-of-roundness, so that its roundness meets the requirements;

[0017] b4. Pressed ribs: A semicircular ring groove is formed by extruding the lower portion of the outer wall of the titanium ring blank;

[0018] b5 pressure clear angle: the mouth ring groove is extruded again to make its cross section square, so that the bottom wall of the mouth ring groove is perpendicular to the horizontal plane;

[0019] b6. Cutting the bottom: Using a cutting device, cut the bottom wall of the ring groove and reserve the required size to form a vertical downward connection portion. The connection portion and the outer wall of the titanium ring are limited to a step.

[0020] b7. Flat mouth: Using a cutting device, cut the upper end of the titanium ring blank according to the required specifications to form a titanium ring of the required height;

[0021] c. Processing of the titanium liner body:

[0022] c1. Take the required specifications of titanium tube;

[0023] c2 water expansion: water expansion equipment is used to form a titanium liner gallbladder body embryo, the gallbladder body embryo includes a gallbladder body head, inwardly contracted gallbladder body neck, gallbladder body and gallbladder body bottom head;

[0024] c3. Bottom cutting: Use a cutting device to remove the bottom of the gallbladder body;

[0025] c4 flat bottom: according to the required specifications, the upper and lower ports of the gallbladder body embryo cutting to form the required height size of the gallbladder body;

[0026] c5 welding liner bottom; take the titanium liner bottom, the titanium liner bottom upper port and the lower port of the gallbladder body are connected by welding to form a titanium liner;

[0027] d. Processing of titanium steel composite shell of the outer shell:

[0028] d1. Filling brazing material: Take the stainless steel shell and fill the brazing material in its ring groove;

[0029] d2. Locking the titanium ring: Take the titanium ring and insert the connecting portion at its lower end into the annular groove so that the lower end surface of the stop step is limited to the shoulder of the stainless steel shell. Then, bend the inner side of the annular groove outward to form a fixed portion, so that the fixed portion is pressed against the stop step (and contacts the inner wall of the titanium ring), so that the titanium ring and the stainless steel shell form a titanium-steel composite shell embryo;

[0030] d3. Vacuum brazing: The titanium-steel composite shell body is placed in a vacuum furnace for vacuum brazing. The brazing material is melted and fills the ring groove. After cooling and solidification, the brazing material connects the titanium material ring and the stainless steel shell body to form a titanium-steel composite shell;

[0031] e. Titanium liner and shell combination:

[0032] e1. Fitting flange: The titanium liner is inserted from the bottom of the titanium-steel composite shell and the mouth portion thereof extends outward from the titanium-steel composite shell mouth, and then the mouth portion of the gallbladder is folded outward to form a flange;

[0033] e2 weld: The edge of the flange overlaps the upper port of the titanium ring and connects the two by welding to complete the connection between the titanium liner of the cup and the titanium-steel composite shell;

[0034] e3 titanium steel composite shell weld bottom: the stainless steel shell bottom upper port and the lower port of the titanium steel composite shell are welded to form a shell;

[0035] e4. Vacuuming: A vacuum hole is provided at the bottom of the stainless steel shell for vacuuming. The vacuum insulation cavity between the titanium liner and the shell is evacuated using the existing vacuuming process to form a vacuum layer between the titanium liner and the shell.

[0036] In the processing steps of the stainless steel shell body, the a2. water expansion step is a two-out process: a water expansion device is used to expand two stainless steel shell body blanks symmetrically in upper and lower directions at one time, and then the blanks are divided into cups by laser cutting.

[0037] The processing steps of the stainless steel shell body also include a shoulder angle pressing step: the shoulder of the stainless steel shell body blank is extruded into a desired shape and curvature by using an extrusion forming device through a shoulder angle pressing step.

[0038] In the processing steps of the stainless steel shell body, after a5. flat mouth and flat bottom are completed, burrs on the mouth and bottom are removed.

[0039] In the processing steps of the titanium material mouth ring, after b5. corner clearing is completed, a thread rolling step is also included: a thread connecting to the cup cover is formed in the middle of the titanium material mouth ring blank by using a thread rolling machine.

[0040] In the processing step of the titanium material mouth ring, the burrs of the upper end are removed after the b8. flat end step.

[0041] In the processing steps of the titanium material inner liner body, after c4. flat mouth and flat bottom step, it also includes: forming an inwardly concave water sealing rib on the neck of the titanium material inner liner body by inward extrusion, which is used to cooperate with the sealing ring on the cup cover to seal water.

[0042] The cross section of the annular groove is U-shaped, and the outer wall of the connecting portion is tightly matched with the inner wall outside the annular groove, which can preliminarily fix the titanium material mouth ring so that the titanium material mouth ring will not shake during the processing.

[0043] The brazing material is BAG72Cu, and the brazing material is annular and is sleeved in the annular groove.

[0044] Compared with the prior art, the beneficial effects of the present invention are: the titanium liner insulation cup body processed by the above technical solution is

[0045] 1. Due to the use of titanium mouth ring, the brazing part is far away from the cup body port, the brazing material does not come into contact with the human body and will not migrate to the inner liner, making it safer to use;

[0046] 2. The part where your lips touch when drinking water is made of titanium, which is safer than stainless steel.

[0047] 3. The connecting portion is inserted into the annular groove filled with brazing material, the lower end surface of the limiting step is limited to the shoulder, and the fixing portion is pressed against the upper end surface of the limiting step (preferably in conflict with the inner wall of the titanium material mouth ring at the same time). This structure makes the connection between the titanium material mouth ring and the stainless steel shell more secure. In particular, when the cup falls, due to the presence of the fixing structure, the impact force of the cup falling to the ground on the brazing position is reduced, which can protect the brazing from cracking and ensure that the vacuum performance is not affected. Even if the brazing part cracks, the mouth ring will not fall off.

[0048] 4. The cross section of the annular groove is U-shaped, and the outer wall of the connecting portion is tightly matched with the inner wall of the outer side of the annular groove. This structure can preliminarily fix the titanium material mouth ring so that the titanium material mouth ring will not shake during the processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] Figure 1 This is a schematic structural diagram of a titanium liner thermos cup body manufactured using the processing method of the present invention;

[0050] Figure 2 yes Figure 1 A magnified view of part A;

[0051] Figure 3 yes Figure 1 Schematic diagram of the structure of the middle shell;

[0052] Figure 4 yes Figure 1 Schematic diagram of the structure of the titanium material liner;

[0053] Figure 5 yes Figure 1 Schematic diagram of the processing steps of the stainless steel shell;

[0054] Figure 6 yes Figure 1 Schematic diagram of the processing steps of the titanium material mouth ring;

[0055] Figure 7 yes Figure 1 Schematic diagram of the processing steps for the inner liner of the titanium material;

[0056] Figure 8 yes Figure 1 Schematic diagram of the processing steps for the titanium-steel composite shell of the middle shell;

[0057] Figure 9 yes Figure 1 Schematic diagram of the processing steps for combining the inner liner and outer shell of titanium material. Implementation Method

[0058] In order to make the technical solution of the present invention clearer, the following Figures 1 to 9It should be understood that the specific embodiments described in this specification are only for explaining the present invention and are not intended to limit the scope of protection of the present invention.

[0059] The present invention is a method for processing a titanium liner thermos cup body, comprising the following steps:

[0060] a. Processing of stainless steel shell 2-1:

[0061] a1. Take the stainless steel round tube of required specifications

[0062] a2 water expansion: water expansion equipment is used to form a stainless steel body embryo, the stainless steel body embryo includes a stainless steel body head 2-1-4, shoulder 2-1-1 and body 2-1-5;

[0063] a3 cutting: The head of the stainless steel shell body embryo is removed by a cutting device (laser is used in this solution) to form the mouth of the stainless steel shell body embryo 2-1-6;

[0064] a4 reverse stretching: between the mouth and shoulder of the stainless steel shell body by reverse stretching, forming a downward concave annular groove 2-1-2;

[0065] a5 flat bottom: According to the required specifications, the upper and lower ports of the stainless steel shell body are cut to form the desired height size of the stainless steel shell body 2-1, so that the inner side of the ring groove 2-1-2 is reserved for processing the inner portion of the fixed portion 2-1-3 2-1-3 ';

[0066] b. Processing of titanium ring 2-2:

[0067] b1. Take the required specifications of titanium tube;

[0068] b2 cutting pipe: cutting the desired height size of the titanium material ring blank by cutting device;

[0069] b3. Rounding: The titanium ring blank is reshaped to correct any out-of-roundness, so that its roundness meets the requirements;

[0070] b4 ribs: The lower portion of the outer wall of the titanium ring blank is formed by extrusion into a semicircular cross-section of the ring groove 2-2-1;

[0071] b5 pressure clear angle: the mouth ring groove 2-2-1 is extruded again to make its cross section square, so that the mouth ring groove 2-2-1 bottom wall 2-2-1 'perpendicular to the horizontal plane;

[0072] b6 bottom cutting: using a cutting device, the bottom wall of the mouth ring groove 2-2-1 2-2-1 'parts are cut, and the bottom wall of the required size is reserved to form a vertical downward connection portion 2-2-1-1, the connection portion 2-2-1-1 and the outer wall of the titanium material mouth ring 2-2 is between the limit step 2-2-1-2, the limit step 2-2-1-2 can be ensured by the pressure clearing angle with the connection portion 2-2-1-1 perpendicular;

[0073] b7 flat mouth: using a cutting device, in accordance with the required specifications, the upper end of the titanium material ring blank body is cut to form the desired height size of the titanium material ring 2-2;

[0074] c. Processing of the titanium liner 1:

[0075] c1. Take the required specifications of titanium tube;

[0076] c2 water expansion: using water expansion equipment to form a titanium liner gallbladder body embryo 1, the gallbladder body embryo includes a gallbladder body head 1-1, inwardly contracted gallbladder body neck 1-2, gallbladder body 1-3 and gallbladder body bottom head 1-4;

[0077] c3. Cutting the bottom: Using a cutting device, remove the bottom 1-4 of the gallbladder body;

[0078] c4 flat bottom: according to the required specifications, the upper and lower ports of the gallbladder body embryo cutting to form the required height size of the gallbladder body;

[0079] c5 welding liner bottom; take the titanium liner bottom 1-5, the titanium liner bottom 1-5 upper port and the lower port of the gallbladder body are connected by welding after docking to form a titanium liner 1;

[0080] d. Processing of titanium steel composite shell of shell 2:

[0081] d1 filling brazing material: Take the stainless steel shell 2-1, and fill the brazing material 3 in its annular groove 2-1-2;

[0082] d2. Locking the titanium ring 2-2: Take the titanium ring 2-2, insert the connecting portion 2-2-1-1 at its lower end into the annular groove 2-1-2, so that the lower end surface of the limiting step 2-2-1-2 is limited to the shoulder 2-1-1 of the stainless steel shell 2-1, and then bend the inner side of the annular groove 2-1-2 outward to form a fixed portion 2-1-3, so that the fixed portion 2-1-3 is pressed against the limiting step 2-2-1-2 (preferably at the same time and in conflict with the inner wall of the titanium ring 2-2), so that the titanium ring 2-2 and the stainless steel shell 2-1 constitute a titanium-steel composite shell embryo;

[0083] d3 vacuum brazing: The titanium-steel composite shell blank is placed in a vacuum furnace for vacuum brazing, by brazing so that the brazing material melts and fills the ring groove 2-1-2, and after cooling and solidification, the brazing material is connected to the titanium material mouth ring 2-2 and the stainless steel shell body 2-1 to form a titanium-steel composite shell;

[0084] e. Combination of titanium liner 1 and outer shell 2:

[0085] e1 with flange: the titanium liner 1 is inserted from the bottom of the titanium-steel composite shell and the gallbladder portion extends out of the titanium-steel composite shell mouth, and then the gallbladder mouth portion is folded outward to form a flange 1-6;

[0086] e2 weld: The edge of the flange 1-6 overlaps the upper port of the titanium ring 2-2, and the two are connected by welding to complete the connection between the titanium liner 1 and the titanium-steel composite shell of the cup;

[0087] e3 titanium steel composite shell weld bottom: the stainless steel shell bottom upper port and the lower port of the titanium steel composite shell is welded to form a shell 2;

[0088] e4. Vacuuming: A vacuum hole for vacuuming is provided at the bottom of the stainless steel shell. The vacuum insulation cavity between the titanium liner 1 and the outer shell 2 is vacuumed using the existing vacuuming process to form a vacuum layer between the titanium liner 1 and the outer shell 2.

[0089] Preferably, in the processing steps of the stainless steel shell 2-1, the a2. water expansion step is a two-out-one process: a water expansion device is used to simultaneously expand two symmetrical stainless steel shell bodies, which are then separated into cups by laser cutting. A shoulder angle pressing step is also included: an extrusion molding device is used to press the shoulders of the stainless steel shell bodies into the desired shape and curvature. After the a5. flat mouth and bottom are completed, burrs on the mouth and bottom are removed.

[0090] Preferably, the titanium bezel 2-2 processing step includes a thread rolling step after completing step b5. corner cleaning: a thread 2-2-2 is formed in the middle of the titanium bezel blank using a thread rolling machine to connect to the cup lid. After step b8. flattening the end, burrs are removed from the upper end.

[0091] Preferably, in the processing steps of the body of the titanium inner liner 1, after step c4. flat mouth and flat bottom, it also includes: forming an inwardly concave water sealing rib 1-7 on the neck of the body of the titanium inner liner 1 by inward extrusion, which is used to cooperate with the sealing ring on the cup cover to seal water.

[0092] During the processing of the above-mentioned stainless steel shell, titanium mouth ring and titanium liner, it is preferred to finally perform cleaning and drying.

[0093] Preferably, the groove cross-section of the annular groove 2-1-2 is U-shaped, and the outer wall of the connecting portion 2-2-1-1 is tightly fitted with the inner wall of the outer side of the annular groove 2-1-2, so that the titanium material ring 2-2 can be preliminarily fixed so that the titanium material ring 2-2 will not shake during the processing.

[0094] Preferably, the brazing material 3 is BAG72Cu, which is annular and fits into the annular groove 2-1-2. This annular brazing material overcomes the defects of uneven filling of powdered brazing material, uneven thickness of solder joints after brazing, and poor firmness.

[0095] The titanium liner insulation cup body made using the above-mentioned processing method includes a titanium liner 1 and an outer shell 2. The outer shell 2 is composed of a stainless steel shell body 2-1, a stainless steel shell bottom 2-0 and a titanium material ring 2-2 brazed to the upper end of the stainless steel shell body 2-1. The upper end of the titanium material ring 2-2 is connected to the upper end of the titanium liner 1 by welding, and a vacuum insulation cavity is formed between the titanium liner 1 and the outer shell 2. Preferably, the lower end portion of the titanium material mouth ring 2-2 is bent inward to form a straight limiting step 2-2-1-2 and a vertical connecting portion 2-2-1-1 in sequence, and the upper end portion of the stainless steel shell body 2-1 is bent inward to form a shoulder 2-1-1, an annular groove 2-1-2 and a fixing portion 2-1-3 in sequence, and the connecting portion 2-2-1-1 is inserted into the annular groove 2-1-2 filled with brazing material, and the lower end face of the limiting step 2-2-1-2 is limited to the shoulder 2-1-1, and the fixing portion 2-1-3 is pressed against the upper end face of the limiting step 2-2-1-2 (preferably simultaneously in conflict with the inner wall of the titanium material mouth ring 2-2). As a further preference, the groove cross-section of the annular groove 2-1-2 is U-shaped, and the outer side wall of the connecting portion 2-2-1-1 is tightly fitted with the inner side wall of the annular groove 2-1-2, so that the titanium material mouth ring 2-2 can be preliminarily fixed so that the titanium material mouth ring 2-2 will not shake during the processing. As a preference, the mouth of the titanium material inner liner 1 is folded outward to form a flange 1-6, and the edge of the flange 1-6 overlaps the upper end of the titanium material mouth ring 2-2. The upper end of the titanium material mouth ring 2-2 and the upper end of the titanium material inner liner 1 are connected by welding at the overlap of the edges. As a preference, the middle part of the titanium material mouth ring 2-2 is provided with a thread 2-2-2 for connecting to the cup lid. The neck of the body of the titanium material inner liner 1 is provided with an inwardly recessed water-sealing rib 1-7 for cooperating with the sealing ring on the cup lid to seal water.

Claims

1. A method for processing a titanium liner thermos cup body, characterized in that The steps include: a. Processing of stainless steel shell (2-1): a1. Take the stainless steel round tube of required specifications a2 water expansion: water expansion equipment is used to form a stainless steel shell body embryo, the stainless steel shell body embryo includes a stainless steel shell head (2-1-4), shoulder (2-1-1) and body (2-1-5); a3 cutting: the head of the stainless steel shell body embryo is removed by laser cutting device to form the mouth of the stainless steel shell body embryo (2-1-6); a4. Reverse stretching: Reverse stretching is performed between the mouth and shoulder of the stainless steel shell body to form a downwardly concave annular groove (2-1-2); a5 flat bottom: According to the required specifications, the upper and lower ports of the stainless steel shell body are cut to form a stainless steel shell body (2-1) of the required height, so that the inner side of the ring groove (2-1-2) is reserved for processing the inner side of the fixed portion (2-1-3) (2-1-3 '); b. Processing of titanium ring (2-2): b1. Take the required specifications of titanium tube; b2 cutting pipe: cutting the desired height size of the titanium material ring blank by cutting device; b3. Rounding: The titanium ring blank is reshaped to correct any out-of-roundness, so that its roundness meets the requirements; b4. Pressing ribs: A semicircular ring groove (2-2-1) is formed by extruding the lower portion of the outer side wall of the titanium ring blank. b5 pressure clear angle: the mouth ring groove (2-2-1) is extruded again to make its cross-section square, so that the mouth ring groove (2-2-1) of the bottom wall (2-2-1 ') perpendicular to the horizontal plane; b6. Cutting the bottom: using a cutting device, cutting the bottom wall (2-2-1') of the ring groove (2-2-1) and leaving a required size of the bottom wall to form a vertical downward connecting portion (2-2-1-1), the connecting portion (2-2-1-1) and the outer wall of the titanium ring (2-2) are between the limiting steps (2-2-1-2); b7 flat mouth: using a cutting device, in accordance with the required specifications, the upper end of the titanium material ring blank is cut to form the desired height size of the titanium material ring (2-2); c. Processing of the titanium liner (1): c1. Take the required specifications of titanium tube; c2 water expansion: using water expansion equipment to form a titanium liner (1) of the gallbladder body embryo, the gallbladder body embryo includes a gallbladder body head (1-1), the inward contraction of the gallbladder body neck (1-2), the gallbladder body (1-3) and the gallbladder body bottom head (1-4); c3. Cutting the bottom: Using a cutting device, remove the bottom of the gallbladder (1-4); c4 flat bottom: according to the required specifications, the upper and lower ports of the gallbladder body embryo cutting to form the required height size of the gallbladder body; c5 welding liner bottom; take the titanium liner bottom (1-5), the titanium liner bottom (1-5) of the upper port and the lower port of the gallbladder body are connected by welding to form a titanium liner (1); d. Processing of titanium steel composite shell of outer shell (2): d1. Filling the brazing material: Take the stainless steel shell (2-1) and fill the brazing material (3) in its annular groove (2-1-2); d2. Locking the titanium ring (2-2): Take the titanium ring (2-2), insert the connecting portion (2-2-1-1) at its lower end into the annular groove (2-1-2), so that the lower end surface of the limiting step (2-2-1-2) is limited to the shoulder (2-1-1) of the stainless steel shell (2-1), and then bend the inner side of the annular groove (2-1-2) outward to form a fixing portion (2-1-3), so that the fixing portion (2-1-3) is pressed against the limiting step (2-2-1-2) and contacts the inner wall of the titanium ring (2-2), so that the titanium ring (2-2) and the stainless steel shell (2-1) constitute a titanium-steel composite shell embryo; d3 vacuum brazing: The titanium-steel composite shell blank is placed in a vacuum furnace for vacuum brazing, and the brazing material is melted by brazing to fill the ring groove (2-1-2). After cooling and solidification, the brazing material connects the titanium material ring (2-2) and the stainless steel shell (2-1) to form a titanium-steel composite shell; e. Titanium material liner (1) and shell (2) combination: e1. Fitting flange: insert the titanium liner (1) from the bottom of the titanium-steel composite shell and extend the gallbladder opening outward from the titanium-steel composite shell opening, and then fold the gallbladder opening outward to form a flange (1-6); e2. Welding: The edge of the flange (1-6) is overlapped on the upper port of the titanium ring (2-2), and the two are connected by welding to complete the connection between the titanium liner of the cup (1) and the titanium-steel composite shell; e3 titanium steel composite shell weld bottom: the stainless steel shell bottom upper port and the titanium steel composite shell lower port welded to form a shell (2); e4. Vacuuming: A vacuum hole for vacuuming is provided on the bottom of the stainless steel shell. A vacuuming process is used to vacuumize the vacuum insulation cavity between the titanium material liner (1) and the shell (2), so that a vacuum layer is formed between the titanium material liner (1) and the shell (2).

2. The method for processing a titanium liner thermos cup body according to claim 1, characterized in that: In the processing steps of the stainless steel shell body (2-1), the a2. water expansion step is a one-out-two process: a water expansion device is used to expand two stainless steel shell body embryos symmetrically in upper and lower directions at one time, and then the two are divided into cups by laser cutting.

3. The processing method of the titanium liner thermos cup body according to claim 2 is characterized in that: The processing steps of the stainless steel shell body (2-1) also include a shoulder angle pressing step: the shoulder of the stainless steel shell body blank is extruded into a desired shape and curvature by using an extrusion forming device through a shoulder angle pressing step.

4. The method for processing a titanium liner thermos cup body according to claim 3, characterized in that: In the processing steps of the stainless steel shell body (2-1), after a5. the flat mouth and flat bottom are completed, the burrs on the mouth and bottom are removed.

5. The method for processing a titanium liner thermos cup body according to claim 1, characterized in that: In the processing steps of the titanium material mouth ring (2-2), after b5. corner clearing is completed, a thread rolling step is also included: a thread (2-2-2) connected to the cup cover is formed in the middle of the titanium material mouth ring blank by using a thread machine through thread rolling.

6. The method for processing a titanium liner thermos cup body according to claim 5, characterized in that: In the processing step of the titanium material mouth ring (2-2), the burrs of the upper end are removed after the b8. flat end step.

7. The method for processing a titanium liner thermos cup body according to claim 1, characterized in that: In the processing steps of the body of the titanium material inner liner (1), after step c4. flat mouth and flat bottom, the method further comprises: forming an inwardly concave water sealing rib (1-7) on the neck of the body of the titanium material inner liner (1) by inward extrusion, which is used to cooperate with the sealing ring on the cup cover to seal water.

8. The method for processing a titanium liner thermos cup body according to claim 1, characterized in that: The groove cross-section of the annular groove (2-1-2) is U-shaped, and the outer side wall of the connecting portion (2-2-1-1) is tightly matched with the inner side wall of the outer side of the annular groove (2-1-2), so that the titanium material mouth ring (2-2) can be initially fixed so that the titanium material mouth ring (2-2) will not shake during the processing process.

9. The method for processing a titanium liner thermos cup body according to claim 1, characterized in that: The brazing material (3) is made of BAG72Cu, and the brazing material made of BAG72Cu is annular and is sleeved in the annular groove (2-1-2).

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