A processing technology of a spherical kettle

Abstract

The application discloses a processing technology of a spherical pot, which comprises the following steps: A, taking a round pipe, cutting the round pipe to obtain a tubular embryo; B, taking a pot bottom, welding the upper end surface of the pot bottom and the lower end surface of the tubular embryo to be flush to obtain a tubular primary model; C, water swelling forming the tubular primary model to obtain a spherical pot body embryo, and a mouth part embryo is formed at the top of the pot body embryo; D, necking the mouth part embryo through a necking die to obtain a necking part and a surplus area; E, cutting the surplus area, and the remaining part after the cutting of the surplus area is used as a working area; F, rolling a mouth corner and flattening the mouth of the working area to obtain a transverse part, and the processing operation of the spherical pot is completed. Through the above steps, the problems of large error and poor welding quality caused by welding the pot bottom after water swelling can be avoided, and enough internal supporting force can be provided for the inner side of the mouth part embryo and the upper part of the pot body embryo during the necking operation, so that the necking requirement of the mouth part embryo can be better met.

Description

Technical Field

[0001] The invention relates to a spherical pot, in particular to a processing technology of the spherical pot. Background Art

[0002] The cup body or pot body of today's stainless steel cups and pots are generally cylindrical with equal diameters at the top and bottom, or the upper part is curved and the lower part is straight. When manufacturing this kind of cup or pot, a pipe with open ends is generally used to swell and shrink the mouth to obtain a semi-finished product with open ends. The vertical bottom of the semi-finished product is then aligned with the bottom shell and welded to obtain a complete cup body or pot body.

[0003] With the continuous development of society, people have put forward higher requirements for kettles. Therefore, spherical kettles with a body similar to a sphere have gradually appeared on the market. When this kind of kettle is manufactured using traditional manufacturing technology, the bottom of the semi-finished kettle body is no longer a vertical line, but an arc inclined inward. In order to ensure that the kettle body formed by welding is spherical, the upper part of the kettle bottom also needs to be stretched to form an arc inclined outward. However, due to the errors in water rise and stretching operations themselves, the joint surface between the semi-finished kettle body and the kettle bottom often cannot be aligned, resulting in unevenness after welding, poor welding quality, etc. The yield rate cannot meet the needs of industrial production well, so it needs to be improved. Summary of the Invention

[0004] The present invention provides a new processing technology for spherical teapots to address the defects of the traditional manufacturing process in the prior art, such as large errors in manufacturing spherical teapots, unevenness after welding the semi-finished teapot body and the teapot bottom, and poor welding quality.

[0005] In order to solve the above technical problems, the present invention is achieved through the following technical solutions:

[0006] A processing technology for a spherical pot comprises the following steps:

[0007] A. Take a round tube and cut it to obtain a tubular embryo;

[0008] B. Take a pot bottom, align the upper end surface of the pot bottom with the lower end surface of the tubular embryo, and then weld them to obtain a tubular prototype;

[0009] C. performing water expansion molding on the tubular prototype to obtain a spherical pot body embryo, wherein a mouth embryo is formed on the top of the pot body embryo;

[0010] D. The mouth blank is necked by a necking mold to obtain a necked portion and a margin area, wherein the necking mold includes an upper mold assembly, a lower mold assembly, and a necking roller assembly; the upper mold assembly includes an upper mold base assembly, an upper mold core assembly, an end face inner support assembly, and a mouth inner support assembly; the upper portion of the upper mold core assembly is connected to the upper mold base assembly; the end face inner support assembly and the mouth inner support assembly are rotatably connected to the lower portion of the upper mold core assembly, respectively; the mouth inner support assembly is located below the end face inner support assembly, and the mouth inner support assembly is eccentrically arranged; the end face inner support assembly presses against the inner wall of the mouth end face of the mouth blank, and the mouth inner support assembly presses against the inner wall of the mouth blank and the inner wall of the upper portion of the pot body blank;

[0011] E. cutting the margin area, and the remaining portion of the margin area after cutting serves as the working area;

[0012] F. Roll the corners and flatten the edges of the working area to obtain the transverse portion, completing the processing of the spherical pot.

[0013] Through steps A and B, the tubular embryo and the bottom of the pot can be welded to form a tubular prototype, that is, the step of welding the bottom of the pot is put in front to avoid problems such as large errors and poor welding quality caused by welding the bottom of the pot after water rises. Then, through step C, water rising forming is performed to obtain a spherical pot body embryo.

[0014] During the subsequent necking operation, the bottom of the pot body has been sealed by the bottom of the pot, so the pot body in the present invention can no longer use the existing lower mold internal support to extend from the bottom to support the pot mouth. If the internal support is only extended from the upper side of the mouth body into the pot body for internal support, in order to ensure that the internal support can still be taken out from the upper side after the necking operation is completed, the existing internal support can only partially support the mouth body, and cannot well support the entire mouth body and the upper part of the pot body. This will result in insufficient shrinkage of the mouth body during necking, and the ideal necking shape cannot be achieved, or the necking quality cannot be guaranteed due to insufficient internal support force, and the obtained mouth roundness cannot meet the manufacturing requirements. Therefore, the present invention further solves the above problems through the necking mold with an eccentrically arranged mouth internal support component in step D. The upper die assembly, lower die assembly, and necking roller assembly cooperate to neck the mouth blank. During necking, the end face internal support assembly presses against the inner wall of the mouth end face of the mouth blank. Furthermore, the mouth internal support assembly presses against the inner wall of the mouth blank and the inner wall of the upper portion of the body blank, thereby providing sufficient internal support force for the inner side of the mouth blank and the upper portion of the body blank during necking, better meeting the necking requirements of the mouth blank. Finally, the remaining area obtained after necking is processed through steps E and F, completing the processing of the spherical pot.

[0015] As preferred, the processing technology of the spherical kettle as described above, the end face inner support assembly comprises a rotating top head and a first rotating bearing, the rotating top head is rotationally connected with the lower part of the upper mold core assembly through the first rotating bearing, and the rotating top head is pressed against the inner wall of the mouth end face of the mouth body.

[0016] The rotating top head and the first rotating bearing are matched with each other, so that the rotating top head is synchronously rotated with the mouth of the mouth body during the necking process, thereby improving the stability of the mouth body during rotation and providing the mouth end face of the mouth body with an inner support force.

[0017] As preferred, the processing technology of the spherical kettle as described above, the end face inner support assembly comprises a rotating top head and a first rotating bearing, the rotating top head is rotationally connected with the lower part of the upper mold core assembly through the first rotating bearing, and the rotating top head is pressed against the inner wall of the mouth end face of the mouth body.

[0018] The rotating top head and the first rotating bearing are matched with each other, so that the rotating top head is synchronously rotated with the mouth of the mouth body during the necking process, thereby improving the stability of the mouth body during rotation and providing the mouth end face of the mouth body with an inner support force.

[0019] As preferred, the processing technology of the spherical kettle as described above, the end face inner support assembly comprises a rotating top head and a first rotating bearing, the rotating top head is rotationally connected with the lower part of the upper mold core assembly through the first rotating bearing, and the rotating top head is pressed against the inner wall of the mouth end face of the mouth body.

[0020] The rotating top head and the first rotating bearing are matched with each other, so that the rotating top head is synchronously rotated with the mouth of the mouth body during the necking process, thereby improving the stability of the mouth body during rotation and providing the mouth end face of the mouth body with an inner support force.

[0021] As preferred, the processing technology of the spherical kettle as described above, the end face inner support assembly comprises a rotating top head and a first rotating bearing, the rotating top head is rotationally connected with the lower part of the upper mold core assembly through the first rotating bearing, and the rotating top head is pressed against the inner wall of the mouth end face of the mouth body.

[0022] The rotating connection through the third rotating bearing can make the rotation of the bottom inner support part more smooth.

[0023] As preferred, the processing technology of the spherical kettle as described above, the end face inner support assembly comprises a rotating top head and a first rotating bearing, the rotating top head is rotationally connected with the lower part of the upper mold core assembly through the first rotating bearing, and the rotating top head is pressed against the inner wall of the mouth end face of the mouth body.

[0024] The rotating connecting platform is used to enhance the overall support of the bottom internal support parts, and the pressure ring adopts an annular structure, which can appropriately reduce the contact area between the pressure ring and the bottom of the pot body embryo, thereby reducing the shape adaptation requirements between the pressure ring and the bottom of the pot body embryo, and can better meet the bottom internal support needs of pot body embryos of different shapes.

[0025] Preferably, the processing technology of the spherical pot described above also includes an eccentric connector, one side of the eccentric connector is connected to the lower part of the upper mold core assembly, and the other side of the eccentric connector is connected to the upper part of the bottom inner support rod, and the central axis of the bottom inner support rod is coaxial with the central axis of the lower mold assembly.

[0026] The eccentric connecting piece is used to realize eccentric connection, thereby returning the bottom internal support rod from the corresponding position of the eccentrically set mouth internal support assembly to the central axis of the lower mold assembly, further improving the stability of the bottom internal support rod and the bottom internal support member during rotation, and improving the internal support effect.

[0027] Preferably, in the processing technology of the spherical pot described above, the upper mold core assembly includes an oriented core shaft and a connecting column connected to each other, the connecting column is located on the lower side of the oriented core shaft and is eccentrically arranged, the upper part of the oriented core shaft is connected to the upper mold base assembly, the end face internal support assembly is rotatably connected to the lower part of the oriented core shaft, and the mouth internal support assembly is rotatably connected to the connecting column.

[0028] The directional core shaft and the connecting column are used to adapt to the end face internal support assembly and the mouth internal support assembly respectively, so as to facilitate the later replacement of the end face internal support assembly and the mouth internal support assembly.

[0029] Preferably, the processing technology of the spherical kettle described above further includes a nut, which is threadedly connected to the lower part of the connecting column and is located below the mouth inner support assembly.

[0030] The nut can increase the downward support force of the inner support component of the mouth, thereby further improving the stability of the position of the inner support component of the mouth. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 Schematic diagram of the structure of the tubular prototype in the present invention;

[0032] Figure 2 Schematic diagram of the structure of the pot body embryo with the mouth embryo in the present invention;

[0033] Figure 3 Schematic diagram of the structure of the pot body embryo with the necked portion and the margin area formed in the present invention;

[0034] Figure 4 This is a schematic structural diagram of a pot body embryo with a working area formed therein in the present invention;

[0035] Figure 5 This is a schematic structural diagram of a spherical kettle obtained by the present invention;

[0036] Figure 6 Schematic diagram of the structure of the necking mold in the present invention;

[0037] Figure 7 for Figure 6 A partial enlarged view of part A in the middle. DETAILED DESCRIPTION

[0038] The following is combined with Figure 1-7 The present invention is further described in detail with specific embodiments, but they are not intended to limit the present invention:

[0039] Example 1

[0040] like Figures 1 to 7 As shown, a process for manufacturing a spherical pot comprises the following steps:

[0041] A. Take a round tube and cut it to obtain a tubular embryo 1;

[0042] B. Take a pot bottom 2, align the upper end surface of the pot bottom 2 with the lower end surface of the tubular embryo 1, and then weld them to obtain a tubular prototype 3;

[0043] C. Performing water expansion molding on the tubular prototype 3 to obtain a spherical pot body embryo 4, wherein a mouth embryo 5 is formed on the top of the pot body embryo 4;

[0044] D. The mouth blank 5 is necked by a necking mold 10 to obtain a necked portion 6 and a margin area 7. The necking mold 10 includes an upper mold assembly 11, a lower mold assembly 12, and a necking roller assembly 13. The upper mold assembly 11 includes an upper mold base assembly 14, an upper mold core assembly 15, an end face inner support assembly 16, and a mouth inner support assembly 17. The upper part of the upper mold core assembly 15 is connected to the upper mold base assembly 14, and the end face inner support assembly 16 and the mouth inner support assembly 17 are respectively rotatably connected to the lower part of the upper mold core assembly 15. The mouth inner support assembly 17 is located below the end face inner support assembly 16, and the mouth inner support assembly 17 is eccentrically arranged. The end face inner support assembly 16 presses against the inner wall of the mouth end face of the mouth blank 5, and the mouth inner support assembly 17 presses against the inner wall of the mouth blank 5 and the inner wall of the upper part of the pot body blank 4;

[0045] E. cutting the margin area 7, and the remaining portion of the margin area 7 after cutting serves as the working area 8;

[0046] F. Performing rolling and flattening operations on the working area 8 to obtain the transverse portion 9, thereby completing the processing operation on the spherical pot.

[0047] During the necking operation, the body 4 can be first placed on the mouth internal support assembly 17, and the upper end surface of the mouth body 5 is aligned with the end surface internal support assembly 16. Then, the upper mold assembly 11 is pressed downward and drives the body 4 to move downward until the body 4 is placed on the lower mold assembly 12. Then, the lower mold assembly 12 clamps the body 4, rotates the body 4, and causes the necking roller assembly 13 to press against the outer wall of the mouth body 5, thereby performing the necking operation. During the necking operation, the mouth internal support assembly 17 and the end surface internal support assembly 16 can provide internal support force for the mouth body 5 and the upper part of the body 4, thereby avoiding uncontrollable deformation and other problems during the necking process and improving the necking quality.

[0048] Preferably, the end face internal support assembly 16 includes a rotating head 18 and a first rotating bearing 19. The rotating head 18 is rotatably connected to the lower part of the upper mold core assembly 15 through the first rotating bearing 19. The rotating head 18 presses against the inner wall of the mouth end face of the mouth blank 5.

[0049] Preferably, the mouth inner support assembly 17 includes an inner rotating mold 20 and a second rotating bearing 21. The inner rotating mold 20 is rotatably connected to the lower part of the upper mold core assembly 15 through the second rotating bearing 21. The inner rotating mold 20 presses against the inner wall of the mouth embryo 5 and the inner wall of the upper part of the pot body embryo 4.

[0050] Preferably, it also includes a bottom inner support rod 22 and a bottom inner support member 23, the upper part of the bottom inner support rod 22 is connected to the lower part of the upper mold core assembly 15, and the bottom inner support member 23 is rotatably connected to the lower part of the bottom inner support rod 22, and the bottom inner support member 23 presses against the inner wall of the bottom of the pot body embryo 4.

[0051] Preferably, a third rotary bearing 24 is further included, and the lower portion of the bottom inner support rod 22 is rotatably connected to the bottom inner support member 23 via the third rotary bearing 24 .

[0052] Preferably, the bottom inner support member 23 includes a rotating connecting platform 25 and a pressure ring 26 that are connected to each other. The rotating connecting platform 25 is rotatably connected to the lower part of the bottom inner support rod 22 through a third rotating bearing 24, and the bottom of the pressure ring 26 presses against the inner wall of the bottom of the pot body embryo 4.

[0053] Preferably, an eccentric connector 27 is further included, one side of the eccentric connector 27 is connected to the lower part of the upper mold core assembly 15, and the other side of the eccentric connector 27 is connected to the upper part of the bottom inner support rod 22, and the central axis of the bottom inner support rod 22 is coaxial with the central axis of the lower mold assembly 12.

[0054] Preferably, the upper mold core assembly 15 includes an oriented core shaft 28 and a connecting column 29 that are connected to each other. The connecting column 29 is located on the lower side of the oriented core shaft 28 and is eccentrically arranged. The upper part of the oriented core shaft 28 is connected to the upper mold base assembly 14, the end face internal support assembly 16 is rotatably connected to the lower part of the oriented core shaft 28, and the mouth internal support assembly 17 is rotatably connected to the connecting column 29.

[0055] Preferably, a nut 30 is further included, which is threadedly connected to the lower portion of the connecting column 29 and is located below the mouth inner support assembly 17.

[0056] More specifically, during use, the pressing ring 26 presses against the inner wall of the bottom of the body 4, further improving the stability of the body 4 during the necking process. The inner rotating die 20 presses against the inner wall of the mouth body 5 and the inner wall of the upper portion of the body 4 during the necking process, while the rotating head 18 presses against the inner wall of the mouth end face of the mouth body 5 during the necking process. As the body 4 rotates, the pressing ring 26, the inner rotating die 20, and the rotating head 18 rotate in place, thereby providing sufficient internal support for the mouth body 5 and improving necking quality.

[0057] In short, the above description is only a preferred embodiment of the present invention, and all equivalent changes and modifications made within the scope of the patent application of the present invention should fall within the scope of the present invention.

Claims

1. A process for processing a spherical pot, characterized by: The following steps are involved: A. Take a round tube and cut it to obtain a tubular embryo (1); B. Take a pot bottom (2), align the upper end surface of the pot bottom (2) with the lower end surface of the tubular embryo (1), and then weld them to obtain a tubular prototype (3); C. performing water expansion molding on the tubular prototype (3) to obtain a spherical pot body embryo (4), wherein a mouth embryo (5) is formed on the top of the pot body embryo (4); D. The mouth blank (5) is shrunk by a shrunk mold (10), thereby obtaining a shrunk portion (6) and a margin area (7), wherein the shrunk mold (10) comprises an upper mold assembly (11), a lower mold assembly (12), and a shrunk roller assembly (13), and the upper mold assembly (11) comprises an upper mold base assembly (14), an upper mold core assembly (15), an end face inner support assembly (16), and a mouth inner support assembly (17), and the upper portion of the upper mold core assembly (15) is connected to the upper mold base assembly (14). The end face inner support assembly (16) and the mouth inner support assembly (17) are respectively connected to the lower part of the upper mold core assembly (15), the mouth inner support assembly (17) is located below the end face inner support assembly (16), and the mouth inner support assembly (17) is eccentrically arranged, the end face inner support assembly (16) presses against the inner wall of the mouth end face of the mouth embryo (5), and the mouth inner support assembly (17) presses against the inner wall of the mouth embryo (5) and the inner wall of the upper part of the pot body embryo (4); E. cutting the margin area (7), and the remaining portion of the margin area (7) after cutting serves as the working area (8); F. Performing rolling and flattening operations on the working area (8) to obtain the transverse portion (9), completing the processing operation on the spherical pot.

2. The processing technology of a spherical pot according to claim 1, characterized in that: The end face inner support assembly (16) includes a rotating head (18) and a first rotating bearing (19). The rotating head (18) is rotatably connected to the lower part of the upper mold core assembly (15) through the first rotating bearing (19). The rotating head (18) presses against the inner wall of the mouth end face of the mouth embryo (5).

3. The processing technology of a spherical pot according to claim 1, characterized in that: The mouth inner support assembly (17) includes an inner rotating mold (20) and a second rotating bearing (21). The inner rotating mold (20) is rotatably connected to the lower part of the upper mold core assembly (15) through the second rotating bearing (21). The inner rotating mold (20) presses against the inner wall of the mouth embryo (5) and the inner wall of the upper part of the pot body embryo (4).

4. The processing technology of a spherical pot according to claim 1, characterized in that: It also includes a bottom inner support rod (22) and a bottom inner support member (23), wherein the upper portion of the bottom inner support rod (22) is connected to the lower portion of the upper mold core assembly (15), and the bottom inner support member (23) is rotatably connected to the lower portion of the bottom inner support rod (22), and the bottom inner support member (23) presses against the inner wall of the bottom of the pot body embryo (4).

5. The processing technology of a spherical pot according to claim 4, characterized in that: It also includes a third rotary bearing (24), and the lower part of the bottom inner support rod (22) is rotatably connected to the bottom inner support member (23) through the third rotary bearing (24).

6. The processing technology for a spherical pot according to claim 5, characterized in that: The bottom inner support member (23) comprises a rotating connecting platform (25) and a pressing ring (26) which are connected to each other. The rotating connecting platform (25) is rotatably connected to the lower part of the bottom inner support rod (22) via a third rotating bearing (24). The bottom of the pressing ring (26) presses against the inner wall of the bottom of the pot body embryo (4).

7. The processing technology for a spherical pot according to claim 4, characterized in that: It also includes an eccentric connecting member (27), one side of which is connected to the lower part of the upper mold core assembly (15), and the other side of which is connected to the upper part of the bottom inner support rod (22), and the central axis of the bottom inner support rod (22) is coaxial with the central axis of the lower mold assembly (12).

8. The processing technology for a spherical pot according to claim 1, characterized in that: The upper mold core assembly (15) includes an oriented core shaft (28) and a connecting column (29) that are connected to each other. The connecting column (29) is located on the lower side of the oriented core shaft (28) and is eccentrically arranged. The upper part of the oriented core shaft (28) is connected to the upper mold base assembly (14). The end face internal support assembly (16) is rotatably connected to the lower part of the oriented core shaft (28), and the mouth internal support assembly (17) is rotatably connected to the connecting column (29).

9. The process for manufacturing a spherical pot according to claim 8, characterized in that: It also includes a nut (30), which is threadedly connected to the lower part of the connecting column (29) and is located below the mouth inner support assembly (17).

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