Thin-walled metal ball forming device and thin-walled metal ball manufactured by the same

Abstract

The present invention provides a forming device for a thin-walled metal ball and a thin-walled metal ball manufactured by the same, which solves the technical problems of long process and easy cracking of welds in the existing method. The upper template of the forming device is provided with an upper mold, the upper mold is provided with a first hemispherical cavity, the lower mold is provided with a lower mold and a mounting blind hole, the lower mold is provided with a second hemispherical cavity, and the lower mold and the side wall of the mounting blind hole form an annular groove; the cylindrical support body is slidably connected with the lower mold sleeve, and the upper end thereof exposes the circumferential edge of the second hemispherical cavity, and the cylindrical support body is connected to the annular groove through an elastic member; when the mold is closed, the first hemispherical cavity and the second hemispherical cavity form a spherical cavity, and the cylindrical support body is pressed into the annular groove; when the mold is opened, the first hemispherical cavity and the second hemispherical cavity are separated, and the cylindrical support body is separated from the upper template, and under the action of the elastic member, the cylindrical support body exposes the circumferential edge of the second hemispherical cavity. The present invention also provides a thin-walled metal ball manufactured by the forming device. It can be widely used in the technical field of thin-walled metal ball manufacturing.

Description

Technical Field

[0001] The present application relates to the technical field of thin-walled metal ball manufacturing, and in particular to a thin-walled metal ball forming device and the thin-walled metal ball manufactured by the device. Background Art

[0002] Thin-walled metal balls are characterized by light weight, large specific surface area, and high specific mechanical properties. They are widely used in aerospace, medicine, atomic energy, machinery, construction, electrochemistry and other fields. The manufacturing method of thin-walled metal balls mainly includes hydraulic bulging forming method. The main processes of hydraulic bulging forming method are: cutting, bending, assembly welding, liquid filling bulging, etc. The method is used to prepare thin-walled metal balls, which has the advantages of high material utilization rate and is convenient for on-site assembly and welding. However, the hydraulic bulging forming method has the technical problems of long time and process required, and the weld is prone to cracking during liquid filling bulging. This technical problem needs to be solved urgently. Summary of the invention

[0003] The purpose of the present invention is to solve the deficiencies of the above-mentioned technology, to provide a thin-walled metal ball forming device and the thin-walled metal ball manufactured by the same, to reduce the thin-walled metal ball preparation process and to improve the quality of the finished product.

[0004] To this end, the present invention provides a forming device for a thin-walled metal ball, the forming device is provided with a forming device, the forming device is provided with an upper template, a lower template, a cylindrical support body and an elastic member; the upper template is provided with an upper mold, and the lower template is provided with a lower mold; the upper mold is provided with a first hemispherical cavity opening downward, the lower mold is provided with a second hemispherical cavity opening upward, the first hemispherical cavity and the second hemispherical cavity are provided with an interval and adaptable arrangement facing each other up and down; the lower template is provided with a mounting blind hole, the lower mold is arranged in the mounting blind hole, and the side wall of the lower mold and the side wall of the mounting blind hole form an annular groove with an upper opening; the upper end of the cylindrical support body exposes the circumferential edge of the second hemispherical cavity, the lower end of the cylindrical support body is sleeve-connected with the lower mold, and the outer side wall of the lower mold is tightly attached to the inner wall of the cylindrical support body, the inner wall of the cylindrical support body tightly surrounds the circumferential edge of the second hemispherical cavity, and the cylindrical support body is slidably connected to the lower mold up and down; the cylindrical support body is connected to the annular groove through an elastic member;

[0005] When the upper template and the lower template are closed, the first hemispherical cavity and the second hemispherical cavity form a closed spherical cavity, and the cylindrical support body is completely pressed downward into the annular groove by the upper template; when the upper template and the lower template are opened, the first hemispherical cavity and the second hemispherical cavity are separated from each other, and the cylindrical support body is separated from the upper template, and under the action of the elastic force of the elastic part, one end of the cylindrical support body is exposed from the circumferential edge of the second hemispherical cavity.

[0006] Preferably, a residual material accommodating groove is provided at the bottom of the first hemispherical cavity and the second hemispherical cavity.

[0007] Preferably, the upper mold plate is also provided with an annular gasket, which is arranged vertically opposite to the cylindrical support body and spaced apart from each other; the upper mold is arranged in the annular gasket.

[0008] Preferably, the elastic member is a spring or a spring sheet.

[0009] Preferably, a first step protrusion is provided on the outer periphery of the cylindrical support body, the first step protrusion is arranged in the annular groove, and a second step protrusion is provided on the outer ring wall of the annular groove, and the second step protrusion is used to prevent the first step protrusion from escaping from the annular groove.

[0010] Preferably, the forming equipment is also provided with a lifting device, which is provided with a lifting rod and a driving device, one end of the lifting rod is connected to the power output end of the driving device, and the other end of the lifting rod is connected to the lower mold; under the power output of the driving device, the lifting rod causes the lower mold to rise or descend along the inner wall of the cylindrical support body.

[0011] Preferably, the ejector rod is a lead screw, the driving device is a servo motor, the lower end of the lead screw is coaxially connected to the power output end of the servo motor; the lead screw is connected to the lower mold through a nut adapted thereto; under the power output of the servo motor, the lead screw causes the lower mold to rise or descend along the inner wall of the cylindrical support body.

[0012] Preferably, the lower template is provided with a first lower template and a second lower template, and the first lower template and the second lower template are stacked and connected from top to bottom; the first lower template is provided with a through hole, and the side wall of the through hole, the side wall of the lower mold and the upper surface of the second lower template form an annular groove with an upper opening; a spring mounting hole and a lower mold limiting hole are respectively provided on the upper surface of the second lower template, and the spring mounting hole is arranged at the bottom of the annular groove; the lower mold limiting hole is arranged directly below the cylindrical support body, and the lower mold is slidably connected in the lower mold limiting hole.

[0013] Preferably, a drive device mounting hole is opened on the lower surface of the second lower mold plate, and the drive device mounting hole is connected to the lower mold limit hole through a connecting channel; the servo motor is installed in the drive device mounting hole, and the lead screw passes through the connecting channel and is connected to the lower mold through a nut.

[0014] A thin-walled metal ball is made using any of the above-mentioned forming equipment; the ball wall of the thin-walled metal ball is provided with and only with a pair of mounting through holes or mounting protrusions arranged opposite to each other.

[0015] The beneficial effects of the present invention are as follows: the present invention provides a thin-walled metal ball forming device and the thin-walled metal ball manufactured by the present invention, and the thin-walled metal ball is manufactured by a metal round tube upper and lower ends simultaneously shrinking forming method. Compared with the prior art, the machining and welding steps in the traditional thin-walled metal ball processing are omitted, and the technical problem of easy cracking of the weld during liquid filling and bulging is fundamentally avoided, thereby improving product quality, significantly improving production and processing efficiency, and having a wide range of applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0017] Figure 1 It is a structural schematic diagram of the present invention;

[0018] Figure 2 for Figure 1 The structural diagram of the AA perspective is shown;

[0019] Figure 3 for Figure 1 A schematic structural diagram of a top view of the lower template shown;

[0020] Figure 4 for Figure 1 A schematic diagram of the structure of a partial cross-sectional view with a metal tube installed as shown;

[0021] Figure 5 It is a structural schematic diagram when the upper mold plate and the lower mold plate are molded together;

[0022] Figure 6 It is a structural schematic diagram of the upper and lower templates returning to their original state after being molded together;

[0023] Figure 7 A schematic diagram of the structure of the present invention in which a thin-walled metal ball is ejected;

[0024] Figure 8 for Figure 4 A schematic diagram of the structure of the enlarged view of part A shown;

[0025] Fig. 9 A schematic diagram of a top view of a thin-walled metal ball;

[0026] Fig.10 for Fig. 9 The structural schematic diagram of the BB cross-sectional view shown;

[0027] Fig.11 It is a schematic diagram of the structure of a thin-walled metal ball of the second structure;

[0028] Fig.12 Schematic diagram of the structure of a thin-walled metal ball of the third structure.

[0029] Markings in the figure: 1. upper template, 2. lower template, 3. cylindrical support body, 4. spring, 5. upper mold, 6. lower mold, 7. first hemispherical cavity, 8. second hemispherical cavity, 9. annular groove, 10. spherical cavity, 11. residual material accommodating groove, 12. annular gasket, 13. first step protrusion, 14. second step protrusion, 15. screw, 16. servo motor, 17. nut, 18. mounting through hole, 19. spring mounting hole, 20. lower mold limiting hole, 21. first lower template, 22. second lower template, 23. drive device mounting hole, 24. mounting protrusion, 25. metal round tube, 26. thin-walled metal ball, 27. connecting channel, 71. circumferential edge of the first hemispherical cavity 7, 81. circumferential edge of the second hemispherical cavity 8. DETAILED DESCRIPTION

[0030] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application clearer, the present application is further described in detail in conjunction with the embodiments below. The methods used in the present invention are all conventional methods unless otherwise specified; the raw materials and devices used are all conventional commercially available products unless otherwise specified.

[0031] Depend on Figure 1 , Figure 2 , Figure 4 , Figure 8 As shown, the present invention provides a forming device for a thin-walled metal ball, the forming device is provided with a forming device, the forming device is provided with an upper template 1, a lower template 2, a cylindrical support body 3 and an elastic member; the upper template 1 is provided with an upper mold 5, and the lower template 2 is provided with a lower mold 6; the upper mold 5 is provided with a first hemispherical cavity 7 opening downward, and the lower mold 6 is provided with a second hemispherical cavity 8 opening upward, and the first hemispherical cavity 7 and the second hemispherical cavity 8 are provided with an interval adaptation arrangement in a vertically opposite manner; the lower template 2 is provided with a mounting blind hole, and the lower mold 6 is provided with a In the installation blind hole, the side wall of the lower mold 6 and the side wall of the installation blind hole form an annular groove 9 with an upper opening; the upper end of the cylindrical support body 3 exposes the circumferential edge 81 of the second hemispherical cavity 8, the lower end of the cylindrical support body 3 is sleeved and connected with the lower mold 6, and the outer side wall of the lower mold 6 is close to the inner wall of the cylindrical support body 3, the inner wall of the cylindrical support body 3 tightly surrounds the circumferential edge 81 of the second hemispherical cavity 8, and the cylindrical support body 3 is connected to the lower mold 6 by sliding up and down; the cylindrical support body 3 is connected to the annular groove 9 through an elastic member; Figure 5 As shown, when the upper mold plate 1 and the lower mold plate 2 are molded together, the first hemispherical cavity 7 and the second hemispherical cavity 8 form a closed spherical cavity 10, and the cylindrical support body 3 is completely pressed downward into the annular groove 9 by the upper mold plate 1; Figure 4 , Figure 6As shown, when the upper template 1 and the lower template 2 are opened, the first hemispherical cavity 7 and the second hemispherical cavity 8 are separated up and down, and the cylindrical support body 3 and the upper template 1 are separated from each other. Under the action of the elastic force of the elastic member, one end of the cylindrical support body 3 exposes the circumferential edge 81 of the second hemispherical cavity 8.

[0032] Before using the present invention, the upper surface of the upper template 1 is fixed on the upper anvil of the press, and the lower surface of the lower template 2 is installed on the lower anvil of the press, so that the first hemispherical cavity 7 and the second hemispherical cavity 8 are arranged vertically opposite to each other and spaced apart, and the cylindrical support body 3 and the upper template 1 are separated from each other, and the press is used to drive the upper template 1 to move up and down to complete the preparation work. Figure 4 As shown, the upper template 1 and the lower template 2 are in the open mold state, and the metal round tube 25 is placed in the cylindrical support body 3. The outer wall of the metal round tube 25 and the inner wall of the cylindrical support body 3 are matched with each other through a small gap to ensure that the cylindrical support body 3 continues to provide radial support force for the metal round tube 25 during deformation. At this time, the outer side of the bottom of the metal round tube 25 is located at the circumferential edge 81 of the second hemispherical cavity 8; then, the press is started, and the upper template 1 moves downward to close the mold of the upper template 1 and the lower template 2. The cylindrical support body 3 is slowly pressed downward into the annular groove 9 by the upper template 1. During this process, the circumferential edge 71 of the first hemispherical cavity 7 contacts the metal The press drives the upper mold plate 1 to continue to move downward, forcing the metal round tube 25 to undergo plastic deformation on both the upper and lower sides under the action of pressure. The cylindrical support body 3 provides radial support for the metal round tube 25. During the downward movement of the upper mold plate 1, the upper mold 5 and the lower mold 6 respectively provide pressure perpendicular to the hemispherical cavity wall to the metal round tube 25. The cylindrical support body 3 provides radial support. Under the guidance of the hemispherical cavity walls of the first hemispherical cavity 7 and the second hemispherical cavity 8, the upper and lower ends of the metal round tube 25 flow tangentially along the hemispherical cavity walls, so that the ports at the upper and lower ends of the metal round tube 25 gradually shrink. Figure 5 As shown, when the upper template 1 and the lower template 2 are molded together, the first hemispherical cavity 7 and the second hemispherical cavity 8 form a closed spherical cavity 10, and the cylindrical support body 3 is completely pressed downward into the annular groove 9 by the upper template 1, and the upper and lower ends of the metal tube 25 finally fit together at the bottom of their respective hemispherical cavities to obtain a thin-walled metal ball 26.

[0033] As a preferred embodiment of the present invention, Figure 8As shown, the first hemispherical cavity 7 and the second hemispherical cavity 8 are provided with a residual material receiving groove 11 at the bottom. After the upper and lower ends of the metal round tube 25 are fitted at the bottom of the respective hemispherical cavities, the excess material can flow into the residual material receiving groove 11 to obtain a thin-walled metal ball semi-finished product, and then the residual material part of the thin-walled metal ball semi-finished product is polished to obtain a thin-walled metal ball that meets the requirements. The residual material receiving groove 11 is preferably a hemispherical cavity structure, and its axis coincides with the center axis of the hemispherical cavity in which it is located. The size of the groove is determined according to actual production, so that the excess material can flow into the residual material receiving groove 11 evenly in the circumferential direction to avoid the occurrence of local shearing and tearing.

[0034] As a preferred embodiment of the present invention, Figure 8 As shown, the upper mold plate 1 is also equipped with an annular gasket 12, which is arranged vertically opposite to the cylindrical support body 3 and spaced apart; the upper mold 5 is arranged in the annular gasket 12. During the mold closing process, the annular gasket 12 is in direct contact with the cylindrical support body 3 and is easily worn. The annular gasket 12 is specially designed and can be made of wear-resistant material to extend its service life and facilitate replacement.

[0035] As a preferred embodiment of the present invention, Figure 4 As shown, the elastic member is a spring 4 or a spring sheet, which applies elastic force to the supporting cylindrical support body 3 in the annular groove 9.

[0036] As a preferred embodiment of the present invention, Figure 8 As shown, the outer periphery of the cylindrical support body 3 is provided with a first step protrusion 13, the first step protrusion 13 is arranged in the annular groove 9, and the outer ring wall of the annular groove 9 is provided with a second step protrusion 14, which is used to prevent the first step protrusion 13 from escaping from the annular groove 9 upward.

[0037] As a preferred embodiment of the present invention, Figure 6 , Figure 7As shown, the forming equipment is also provided with a material ejection device, which is provided with a material ejection rod and a driving device, one end of the material ejection rod is connected to the power output end of the driving device, and the other end of the material ejection rod is connected to the lower mold 6; under the power output of the driving device, the material ejection rod causes the lower mold 6 to rise or fall along the inner wall of the cylindrical support body 3, wherein the lower mold 6 rises along the inner wall of the cylindrical support body 3, lifts the thin-walled metal ball 26 out of the cylindrical support body 3, and after taking out the thin-walled metal ball 26, the lower mold 6 falls along the inner wall of the cylindrical support body 3 and returns to its original position. As a further preferred embodiment, the material ejection rod is a lead screw 15, the driving device is a servo motor 16, the lower end of the lead screw 15 is coaxially connected to the power output end of the servo motor 16; the lead screw 15 is connected to the lower mold 6 through a nut 17 adapted thereto; under the power output of the servo motor 16, the lead screw 15 causes the lower mold 6 to rise or fall along the inner wall of the cylindrical support body 3. In addition, the ejector rod can also be a ejector rod, and the driving device can also be a cylinder. The ejector rod is connected to the piston rod of the cylinder. When the piston rod of the cylinder is extended or contracted, the lower mold 6 can also be raised or lowered along the inner wall of the cylindrical support body 3 through the ejector rod.

[0038] As a more preferred embodiment, Figure 1-Figure 4 As shown, the lower template 2 is provided with a first lower template 21 and a second lower template 22, and the first lower template 21 and the second lower template 22 are stacked and connected from top to bottom; the first lower template 21 is provided with a through hole, and the side wall of the through hole, the side wall of the lower mold 6 and the upper surface of the second lower template 22 form an annular groove 9 with an upper opening; the upper surface of the second lower template 22 is provided with a spring mounting hole 19 and a lower mold limiting hole 20, respectively, and the spring mounting hole 19 is arranged at the bottom of the annular groove 9; the lower mold limiting hole 20 is arranged just below the cylindrical support body 3, and the lower mold 6 is slidably connected in the lower mold limiting hole 20. As a further more preferred embodiment, the lower surface of the second lower template 22 is provided with a drive device mounting hole 23, and the drive device mounting hole 23 is connected to the lower mold limiting hole 20 through a connecting channel 27; the servo motor 16 is installed in the drive device mounting hole 23, and the lead screw 15 passes through the connecting channel 27 and is connected to the lower mold 6 through a nut 17.

[0039] The present invention also provides a thin-walled metal ball, which is made using any of the above-mentioned forming equipment, and the ball wall of the thin-walled metal ball 26 is provided with and only provided with a pair of mounting through holes 18 or mounting protrusions 24 arranged opposite to each other, and the preparation process is completed in one step. Among them, when the upper mold plate 1 and the lower mold plate 2 are molded together, the first hemispherical cavity 7 and the second hemispherical cavity 8 form a closed spherical cavity 10, and the cylindrical support body 3 is completely pressed downward into the annular groove 9 by the upper mold plate 1. If the ports at the upper and lower ends of the metal round tube 25 are not in contact with the bottom of their respective hemispherical cavities at this time, a thin-walled metal ball 26 having and only provided with a pair of mounting through holes 18 arranged opposite to each other will be obtained. Fig.12If the ends of the metal tube 25 fit at the bottom of the hemispherical cavity and the excess material just fills the excess material receiving groove 11, a thin-walled metal ball 26 having only one pair of mounting protrusions 24 facing each other will be obtained. Fig. 9 , Fig.10 If the mounting protrusion 24 is further polished and removed, the following Fig.11 A prior art thin walled metal ball 26 is shown.

[0040] It should be noted that the thin-walled metal balls of the first two structures are used to connect the thin-walled metal balls to external devices by providing mounting through holes 18 or mounting protrusions 24. For example, a bolt is passed through the bracket and then extended to be threadedly connected to the mounting through hole 18; or a pair of grooves facing each other up and down are opened on the inner side of the C-shaped bracket, and the two mounting protrusions 24 of the thin-walled metal ball 26 are respectively adapted and clamped in the above grooves to complete the installation of the thin-walled metal ball. The mounting through holes 18 and mounting protrusions 24 are located at specific positions of the thin-walled metal ball 26, that is, there is only one pair of mounting through holes 18 or mounting protrusions 24, which are arranged along the central axis of the thin-walled metal ball 26 and facing the ball wall of the thin-walled metal ball 26.

[0041] In addition, the metal round tube 25 is preferably heat treated so that its plasticity gradually increases from the middle to the two ends; preferably, the plasticity is symmetrically distributed from the middle to the two ends, such as a gradient heat treatment method. During the closing process of the upper mold 5 and the lower mold 6, the metal round tube 25 is forced to undergo plastic deformation at both ends at the same time under the action of pressure, and the middle part remains in its original state without deformation; under the guidance of the hemispherical cavity walls of the first hemispherical cavity 7 and the second hemispherical cavity 8, the upper and lower ends of the metal round tube 25 slide along the tangential direction of the hemispherical cavity walls, so that the ports at the upper and lower ends of the metal round tube 25 gradually shrink, and the deformation order of the metal round tube 25 is carried out from its two ends to the middle at the same time. The dimensions of the tube wall and the diameter of the tube mouth of the metal round tube 25, as well as the specific metal material, are determined according to the thin-walled metal ball actually required to be prepared.

[0042] The present invention provides a thin-walled metal ball forming device and the thin-walled metal ball manufactured by the same. The thin-walled metal ball 26 is manufactured by a metal round tube 25 with the upper and lower ends simultaneously shrinking. Compared with the prior art, the machining and welding steps in the traditional thin-walled metal ball processing are omitted, and the technical problem of easy cracking of the weld during liquid filling and bulging is fundamentally avoided, thereby improving product quality, significantly improving production and processing efficiency, and having a wide range of applications.

[0043] In the description of the present invention, it should be understood that the terms "left", "right", "up", "down", "top", "bottom", "front", "back", "inside", "outside", "back", "middle", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. It should be noted that in the above-mentioned embodiments, the "first" and "second" do not represent an absolute distinction in structure and / or function, nor do they represent a sequential execution order, but are merely for the convenience of description.

[0044] The above is a preferred embodiment of the present application, but it is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A thin-walled metal ball forming device, characterized in that: The forming device is provided with a forming device, wherein the forming device is provided with an upper mold plate (1), a lower mold plate (2), a cylindrical support body (3) and an elastic member; the upper mold plate (1) is provided with an upper mold plate (5), and the lower mold plate (2) is provided with a lower mold plate (6); the upper mold plate (5) is provided with a first hemispherical cavity (7) opening downward, and the lower mold plate (6) is provided with a second hemispherical cavity (8) opening upward, and the first hemispherical cavity (7) and the second hemispherical cavity (8) are arranged vertically opposite to each other and spaced apart from each other; the lower mold plate (2) is provided with a mounting blind hole, and the lower mold plate (6) is arranged in the mounting blind hole, and the lower mold plate (6) The side wall of the cylindrical support body (3) and the side wall of the mounting blind hole form an annular groove (9) with an upper opening; the upper end of the cylindrical support body (3) exposes the circumferential edge (81) of the second hemispherical cavity (8); the lower end of the cylindrical support body (3) is sleeved and connected with the lower mold (6); the outer wall of the lower mold (6) is tightly attached to the inner wall of the cylindrical support body (3); the inner wall of the cylindrical support body (3) tightly surrounds the circumferential edge (81) of the second hemispherical cavity (8); the cylindrical support body (3) is slidably connected to the lower mold (6) up and down; the cylindrical support body (3) is connected to the annular groove (9) via the elastic member; When the upper mold plate (1) and the lower mold plate (2) are molded together, the first hemispherical cavity (7) and the second hemispherical cavity (8) form a closed spherical cavity (10), and the cylindrical support body (3) is completely pressed downward into the annular groove (9) by the upper mold plate (1); when the upper mold plate (1) and the lower mold plate (2) are molded together, the first hemispherical cavity (7) and the second hemispherical cavity (8) are separated from each other, and the cylindrical support body (3) and the upper mold plate (1) are separated from each other. Under the action of the elastic force of the elastic member, one end of the cylindrical support body (3) is exposed from the circumferential edge (81) of the second hemispherical cavity (8).

2. A thin-walled metal ball forming device according to claim 1, characterized in that: A residual material receiving groove (11) is provided at the bottom of each of the first hemispherical cavity (7) and the second hemispherical cavity (8).

3. The thin-walled metal ball forming device according to claim 1, characterized in that: The upper mold plate (1) is also provided with an annular gasket (12), and the annular gasket (12) and the cylindrical support body (3) are arranged vertically opposite to each other with a spacing therebetween; the upper mold (5) is arranged inside the annular gasket (12).

4. The thin-walled metal ball forming device according to claim 1, characterized in that: The elastic member is a spring (4) or a spring sheet.

5. The thin-walled metal ball forming device according to claim 1, characterized in that: The outer periphery of the cylindrical support body (3) is provided with a first step protrusion (13), the first step protrusion (13) is arranged in the annular groove (9), and the outer ring wall of the annular groove (9) is provided with a second step protrusion (14), the second step protrusion (14) is used to prevent the first step protrusion (13) from escaping from the annular groove (9).

6. A thin-walled metal ball forming device according to any one of claims 1 to 5, characterized in that: The forming equipment is also provided with a ejection device, which is provided with an ejection rod and a driving device, one end of the ejection rod is connected to the power output end of the driving device, and the other end of the ejection rod is connected to the lower mold (6); under the power output of the driving device, the ejection rod causes the lower mold (6) to rise or fall along the inner wall of the cylindrical support body (3).

7. The thin-walled metal ball forming device according to claim 6, characterized in that: The ejector rod is a lead screw (15), the driving device is a servo motor (16), the lower end of the lead screw (15) is coaxially connected to the power output end of the servo motor (16); the lead screw (15) is connected to the lower mold (6) via a nut (17) adapted thereto; under the power output of the servo motor (16), the lead screw (15) causes the lower mold (6) to rise or fall along the inner wall of the cylindrical support body (3).

8. The thin-walled metal ball forming device according to claim 7, characterized in that: The lower mold plate (2) is provided with a first lower mold plate (21) and a second lower mold plate (22), and the first lower mold plate (21) and the second lower mold plate (22) are stacked and connected from top to bottom; the first lower mold plate (21) is provided with a through hole, and the side wall of the through hole, the side wall of the lower mold (6) and the upper surface of the second lower mold plate (22) form the annular groove (9) with an upper opening; the upper surface of the second lower mold plate (22) is provided with a spring mounting hole (19) and a lower mold limiting hole (20), respectively, and the spring mounting hole (19) is arranged at the bottom of the annular groove (9); the lower mold limiting hole (20) is arranged directly below the cylindrical support body (3), and the lower mold (6) is slidably connected in the lower mold limiting hole (20).

9. The thin-walled metal ball forming device according to claim 8, characterized in that: A drive device mounting hole (23) is provided on the lower surface of the second lower mold plate (22), and the drive device mounting hole (23) is connected to the lower mold limit hole (20) via a connecting channel (27); the servo motor (16) is installed in the drive device mounting hole (23), and the lead screw (15) passes through the connecting channel (27) and is connected to the lower mold (6) via the nut (17).

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