Cylindrical blank edge thickening spinning forming die and using method thereof

Abstract

The invention provides a cylindrical blank edge thickening spinning forming die and a using method thereof.The cylindrical blank edge thickening spinning forming die comprises a main shaft connector flange plate, an inner die, an outer die, a positioning bolt, a spinning roller and a connecting tool rest combination, the outer die is arranged on the outer side of the inner die in a sleeving mode, and the outer die and the inner die are matched to form a space for containing a cylindrical blank; a plurality of positioning holes are correspondingly formed in the side walls of the inner mold, the cylindrical blank and the outer mold, and the inner mold and the outer mold are matched through positioning bolts to clamp the cylindrical blank; and the spinning roller is fixedly mounted on the connecting tool rest, can rotate around the central axis of the cylindrical blank through driving of the connecting tool rest and can move in the vertical direction, and the spinning roller performs spinning forming on the top end of the cylindrical blank. By combining the structural characteristics of the cylindrical material, the spinning equipment and the mold can tightly surround the circumference of the cylindrical material, it is ensured that in the thickening process, a spinning tool exerts uniform and stable pressure on all points of the edge of the cylindrical material, and therefore high-precision control over the edge thickness and uniform thickening are achieved.

Description

Technical Field

[0001] This invention relates to the field of metal plastic processing technology, specifically to a cylindrical blank edge thickening spinning forming die and its usage method. Background Technology

[0002] In modern manufacturing, the requirements for material processing technology are constantly increasing to meet various complex engineering needs. Cylindrical materials have wide applications in many fields such as machinery manufacturing, aerospace, and petrochemicals. In many cases, it is necessary to thicken the edges of cylindrical materials to enhance their specific properties. For example, in oil extraction pipeline systems, thickening the edges of cylindrical pipes can improve their pressure resistance and corrosion resistance, ensuring safe transportation under high pressure and harsh chemical environments; in the manufacture of certain components for aero-engines, thickening the edges of cylindrical materials helps to improve the strength and high-temperature resistance of the components, adapting to extreme operating conditions.

[0003] A Chinese patent with publication number CN105290188B discloses a method for thickening the wall of a cylindrical component by spinning. The method includes the following steps: First, the cylindrical preform to be thickened is placed on the lower spindle of a spinning machine, and the cylindrical preform is clamped by the upper inner spindle and the lower spindle of the spinning machine; then, the upper outer spindle, which is fitted outside the upper inner spindle, moves downward to compress the wall of the cylindrical preform and then fixes it in place; then, the upper inner spindle, the upper outer spindle, the cylindrical preform, and the lower spindle are rotated together, and the cylindrical rolling wheel is fed radially along the cylindrical preform; the above steps are repeated to thicken the wall of the cylindrical preform in N passes to obtain a cylindrical component.

[0004] Currently, there are various methods for achieving material thickening, among which spinning thickening is one of the more commonly used techniques. While spinning thickening technology for disc plates has achieved certain application results in some specific fields, it still reveals many limitations when dealing with cylindrical materials. Disc plate spinning thickening is mainly designed for disc-shaped structures, and its process design and equipment configuration are based on the characteristics of disc plates. When applied to the edge thickening of cylindrical materials, the following problems arise: poor adaptability, complex process, and limited mechanical properties.

[0005] Therefore, there is a need to provide a spinning forming die for thickening the edge of a cylindrical blank and its usage method, which can solve the problem of the single function of spinning for thickening disc-shaped plates. Furthermore, it can be designed in combination with the structural characteristics of cylindrical materials to ensure that the spinning tool applies uniform and stable pressure to each point on the edge of the cylindrical material during the thickening process, thereby achieving high-precision control and uniform thickening of the edge thickness. Summary of the Invention

[0006] To address the shortcomings of existing technologies, the purpose of this invention is to provide a cylindrical blank edge thickening spinning forming die and its usage method.

[0007] According to the present invention, a cylindrical blank edge thickening spinning forming die includes: a spindle interface flange, an inner die, an outer die, positioning bolts, a spinning wheel, and a connecting tool holder assembly. The outer die is sleeved on the outside of the inner die, and the two cooperate to form a space for accommodating the cylindrical blank. The inner die is fastened to the spindle interface flange, and the outer die is fastened to the inner die.

[0008] Multiple positioning holes are correspondingly opened on the side walls of the inner mold, the cylindrical blank and the outer mold. Multiple positioning bolts are fixed by passing through the three positioning holes in a horizontal sequence. The inner mold and the outer mold clamp the cylindrical blank by the cooperation of the positioning bolts.

[0009] The rotary wheel is securely mounted on the connecting tool holder. Driven by the connecting tool holder, the rotary wheel can rotate around the central axis of the cylindrical blank and move in the vertical direction. The rotary wheel spins the top of the cylindrical blank.

[0010] Preferably, the spindle interface flange is a hollow frustum structure, including a flange and an end interface. The end interface is connected to the machine tool spindle, and the inner mold is sleeved on the outside of the end interface and is fastened to the flange.

[0011] Preferably, the inner mold includes a smooth-surfaced hollow cylindrical body and an inner mold base. The inner diameter of the hollow cylindrical body matches the outer diameter of the end interface. A positioning groove is formed at the center of the inner mold base. A positioning step structure is provided on the flange. The positioning groove is installed on the positioning step structure. Multiple threaded holes passing through the positioning step structure are evenly provided on the bottom inner ring of the flange. The flange is fastened to the inner mold by bolts passing through the threaded holes and the positioning groove.

[0012] Preferably, the outer mold includes a smooth-surfaced hollow cylindrical body and an outer mold base, the outer mold base being mounted on the inner mold base, and the two having a plurality of connecting holes respectively.

[0013] Preferably, the outer diameter of the flange is larger than the outer diameter of the outer mold.

[0014] Preferably, multiple positioning holes are evenly provided circumferentially on the side walls of the inner mold, the cylindrical blank, and the outer mold. The positioning holes of the cylindrical blank and the outer mold are the same size, and the positioning holes of the outer mold are larger than the positioning holes of the inner mold.

[0015] Preferably, the connecting tool holder assembly includes a stepped cuboid structure, with the largest step of the connecting tool holder assembly mounted on the machine tool, and the rotating wheel fastened to the bottom of the end of the smallest step of the connecting tool holder assembly.

[0016] Preferably, the bottom end of the connecting tool holder assembly is provided with a mounting groove, the rotating wheel is provided with a plurality of countersunk holes, the mounting groove is provided with a plurality of mounting holes corresponding one-to-one with the countersunk holes, and the rotating wheel is fastened to the connecting tool holder assembly by bolts.

[0017] Preferably, the bottom of the rotary wheel is provided with a pressure head groove, the pressure head groove is arc-shaped, and the curvature of the pressure head groove matches the cylindrical blank.

[0018] The method of using the cylindrical blank edge thickening spinning forming die provided by the present invention includes the following steps:

[0019] Step S1: First, fasten the inner mold to the spindle interface flange. Then, put the cylindrical blank on the inner mold, ensuring that the positioning holes of the cylindrical blank correspond to the positioning holes of the inner mold. Next, put the outer mold on the outside of the cylindrical blank and fasten it to the inner mold. Finally, use multiple positioning bolts evenly distributed around the circumference to pass through the positioning holes to fix the inner mold, the cylindrical blank, and the outer mold, thereby clamping the cylindrical blank.

[0020] Step S2: Install the spinning wheel at the top of the connecting tool holder assembly. The connecting tool holder assembly is fixed on the spinning machine. The machine moves radially to make the spinning wheel concentric with the cylindrical blank. Then, it moves axially to make the spinning wheel squeeze the cylindrical blank, causing the cylindrical blank to undergo plastic deformation. The cylindrical blank accumulates and eventually fills the pressure head groove of the spinning wheel, thereby obtaining a cylindrical rotating part with thickened outer edge.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] This invention connects the spindle interface flange to the inner and outer molds via positioning bolts. Both the inner and outer molds are hollow cylindrical rotating bodies used for spinning support and clamping of the cylindrical blank, serving as positioning before spinning and axial fixation during the spinning process, maintaining the overall stability of the mold. A spinning wheel is wrapped around the cylindrical blank for direct spinning, with the inner and outer molds guiding the wheel. A connecting tool holder assembly connects the spinning wheel to the machine tool, achieving radial positioning and axial movement control of the wheel. Designed in accordance with the structural characteristics of the cylindrical material, the spinning equipment and mold can closely surround the circumference of the cylindrical material, ensuring that during the thickening process, the spinning tool applies uniform and stable pressure to all points on the edge of the cylindrical material, thereby achieving high-precision control and uniform thickening of the edge thickness. The structure is easy to install and can better meet practical engineering needs. Attached Figure Description

[0023] Other features, objects, and advantages of the present invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0024] Figure 1 This is a schematic diagram illustrating the structure of the spinning die for thickening the edge of a cylindrical blank, which is the main feature of this invention.

[0025] Figure 2 This is a cross-sectional view of the spindle interface flange, which is the main feature of this invention.

[0026] Figure 3 This is a top view of the spindle interface flange, which is the main feature of this invention.

[0027] Figure 4 This is a bottom view of the spindle interface flange, which is the main feature of this invention.

[0028] Figure 5 This is a cross-sectional view of the inner mold, which is the main feature of this invention.

[0029] Figure 6 This is a top view of the inner mold, which is the main feature of this invention.

[0030] Figure 7 This is a bottom view of the inner mold, which is the main feature of this invention.

[0031] Figure 8 This is a cross-sectional view that mainly illustrates the outer mold of this invention;

[0032] Figure 9 This is a top view of the outer mold, which is the main feature of this invention.

[0033] Figure 10 This is a bottom view of the outer mold, which is the main feature of this invention.

[0034] Figure 11 This is a cross-sectional view of the connecting tool holder assembly, which is the main feature of this invention.

[0035] Figure 12 This is a side view of the main body of the connecting tool holder assembly of the present invention;

[0036] Figure 13 This is a top view of the main body of the invention, showing the connecting tool holder assembly;

[0037] Figure 14 This is a cross-sectional view that mainly illustrates the rotating wheel in this invention;

[0038] Figure 15 This is a bottom view of the rotating wheel, which is the main feature of this invention.

[0039] Figure 16 This is a front view of the rotating wheel, which is the main feature of this invention.

[0040] As shown in the figure:

[0041] Detailed Implementation

[0042] The present invention will now be described in detail with reference to specific embodiments. These embodiments will help those skilled in the art to further understand the present invention, but do not limit the invention in any way. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present invention. These all fall within the protection scope of the present invention.

[0043] Example 1

[0044] like Figure 1-16 As shown, a cylindrical blank edge thickening spinning forming die provided by the present invention includes: a main shaft interface flange 1, an inner mold 2, an outer mold 3, positioning bolts 4, a spinning wheel 5, and a connecting tool holder assembly 6. The outer mold 3 is sleeved on the outside of the inner mold 2, and the two cooperate to form a space for accommodating the cylindrical blank 7. The inner mold 2 is fastened to the main shaft interface flange 1, and the outer mold 3 is fastened to the inner mold 2. Multiple positioning holes are correspondingly opened on the side walls of the inner mold 2, the cylindrical blank 7, and the outer mold 3. Multiple positioning bolts 4 pass through the three positioning holes in a horizontal sequence for fixation. The inner mold 2 and the outer mold 3 clamp the cylindrical blank 7 through the positioning bolts 4. The spinning wheel 5 is fastened to the connecting tool holder 6. The spinning wheel 5 is driven by the connecting tool holder 6 to rotate around the central axis of the cylindrical blank 7 and can move in the vertical direction. The spinning wheel 5 spins the top of the cylindrical blank 7.

[0045] The spindle interface flange 1 is a hollow frustum structure, including a flange and an end interface. The end interface connects to the machine tool spindle, and the inner mold 2 is fitted onto the outside of the end interface and securely connected to the flange. The outer diameter of the flange is larger than the outer diameter of the outer mold 3. The spindle interface flange 1 is a hollow frustum structure, and symmetrical threaded holes are distributed in both the flange and end interface portions. The former is used to connect the inner mold 2 and the outer mold 3, and the latter is used to connect the machine tool spindle. A positioning step structure is provided at one end of the flange for positioning the inner mold 2. The maximum diameter of the flange is larger than the outer diameter of the outer mold 3.

[0046] The inner mold 2 includes a smooth-surfaced hollow cylindrical body and an inner mold base. The inner diameter of the hollow cylindrical body matches the outer diameter of the end interface. A positioning groove is formed at the center of the inner mold base. A positioning step structure is provided on the flange. The positioning groove is installed on the positioning step structure. Multiple threaded holes passing through the positioning step structure are evenly arranged on the bottom inner ring of the flange. The flange is fastened to the inner mold 2 by bolts passing through the threaded holes and positioning groove. The inner mold 2 is a smooth-surfaced hollow cylindrical body that serves to position and clamp the blank and guide the spinning wheel 5. It is located on the stepped shape of the flange and is tightly fixed to the main shaft interface flange 1 by bolts to ensure that the blank does not undergo radial displacement during spinning.

[0047] The outer mold 3 includes a smooth-surfaced hollow cylindrical body and an outer mold base. The outer mold base is mounted on the inner mold base, and both have multiple connecting holes. The outer mold 3 is a smooth-surfaced cylindrical body that clamps the blank and guides the rotating wheel 5, working together with the inner mold 2 to clamp the blank.

[0048] Multiple positioning holes are evenly provided on the side walls of the inner mold 2, the cylindrical blank 7 and the outer mold 3 along the circumference. The positioning holes of the cylindrical blank 7 and the outer mold 3 are the same size, but larger than the positioning holes of the inner mold 2.

[0049] The connecting tool post assembly 6 includes a stepped cuboid structure. The largest step of the connecting tool post assembly 6 is mounted on the machine tool, and the rotating wheel 5 is securely mounted on the bottom of the end of the smallest step of the connecting tool post assembly 6. A mounting groove is provided at the bottom of the end of the connecting tool post assembly 6. Multiple countersunk holes are provided on the rotating wheel 5, and multiple mounting holes corresponding to the countersunk holes are provided in the mounting groove. The rotating wheel 5 is securely mounted to the connecting tool post assembly 6 with bolts. The connecting tool post assembly 6 has a stepped cuboid structure, and its top threaded holes correspond one-to-one with the countersunk holes on the rotating wheel 5, used to connect and control the rotating wheel 5, realizing the axial movement of the rotating wheel 5.

[0050] The positioning bolt 4, together with the inner and outer molds, clamps the blank, serving to position it before spinning and fix it axially during the spinning process.

[0051] The bottom of the spinning wheel 5 is provided with a pressure head groove, which is arc-shaped and the curvature of the pressure head groove matches that of the cylindrical blank 7. The spinning wheel 5 is an arc-shaped structure with a certain cross-sectional groove. During the spinning process, the blank is squeezed to cause plastic deformation, and the blank is continuously accumulated until it fills the groove.

[0052] This application is further illustrated by the following data. The end interface dimensions of the spindle interface flange 1 should match the machine tool. The outer port of the flange has six M16 threaded holes for connecting to the machine tool spindle, and the inner port has six symmetrically distributed M8.5 threaded holes for connecting the inner mold 2 (outer diameter Φ156mm). The maximum diameter of the spindle interface flange 1 is Φ385mm. The positioning bolts 4 are used to clamp the blank and maintain the overall stability of the mold. The blank hole and the outer mold hole (outer diameter Φ11mm) are slightly larger than the threaded hole of the inner mold 2 (outer diameter Φ8.5mm) to fix the position of the cylindrical blank 7, thereby achieving the stability of the overall stepped structure of the forming mold. The threaded holes on the connecting tool holder assembly 6 correspond one-to-one with the threaded holes on the rotating wheel 5, used to accurately position the connecting wheel 5 and maintain the overall stability of the mold, achieving radial positioning and axial movement control of the rotating wheel 5.

[0053] The spindle interface flange 1 is connected to the inner mold 2 and outer mold 3 via positioning bolts 4 during spinning. Both the inner mold 2 and outer mold 3 are hollow cylindrical rotating bodies used for spinning support and clamping of the cylindrical blank 7. The side walls of the inner and outer molds have through holes, which are used to fix the cylindrical blank 7 via threaded connections. The spinning wheel 5 is wrapped around the cylindrical blank 7 in an enveloping manner for direct spinning. The inner and outer molds guide the spinning wheel 5. The connecting tool holder assembly 6 connects the spinning wheel 5 to the machine tool, enabling control of the spinning wheel 5.

[0054] This application primarily addresses the limitation of current spinning techniques for thickening disc-shaped sheets. By incorporating the structural characteristics of cylindrical materials, the design allows the spinning equipment and mold to closely surround the circumference of the cylindrical material. This ensures that during the thickening process, the spinning tool applies uniform and stable pressure to all points along the edge of the cylindrical material, thereby achieving high-precision control of edge thickness and uniform thickening. The structure of this application is easy to install and better meets practical engineering needs.

[0055] Example 2

[0056] Based on Example 1, the method of using a cylindrical blank edge thickening spinning forming die provided by the present invention includes the following steps:

[0057] Step S1: First, fasten the inner mold 2 onto the spindle interface flange 1. Then, put the cylindrical blank 7 onto the inner mold 2, ensuring that the positioning holes of the cylindrical blank 7 correspond to the positioning holes of the inner mold 2. Next, put the outer mold 3 onto the outside of the cylindrical blank 7 and fasten it to the inner mold 2. Finally, use multiple positioning bolts 4 evenly distributed along the circumference to pass through the positioning holes to fix the inner mold 2, the cylindrical blank 7 and the outer mold 3, thereby clamping the cylindrical blank 7.

[0058] In step S2, the spinning wheel 5 is installed at the top of the connecting tool holder assembly 6, which is fixed on the spinning machine. The machine moves radially to make the spinning wheel 5 concentric with the cylindrical blank 7, and then moves axially to make the spinning wheel 5 squeeze the cylindrical blank 7, causing the cylindrical blank 7 to undergo plastic deformation. The cylindrical blank 7 accumulates and eventually fills the pressure head groove of the spinning wheel 5, thereby obtaining a cylindrical rotating part with thickened outer edge.

[0059] When performing edge thickening spinning on the cylindrical blank 7, first insert the inner mold 2, then connect and fix the main shaft interface flange 1 to the inner mold 2 through threaded holes. Next, insert the cylindrical blank 7 and fit it onto the outer edge of the inner mold 2, ensuring that the bolt holes of the cylindrical blank 7 correspond to the bolt holes of the inner mold 2. Finally, insert the outer mold 3, and connect and fix the inner mold 2 to the outer mold 3 through threaded holes. The blank and the inner and outer molds are in close contact. During the spinning process, the main force on the blank is the axial force, while the circumferential and radial forces are relatively small. Therefore, several positioning bolts evenly distributed along the circumference are used. 4. The inner mold 2 and outer mold 3 are connected and fixed by threads to clamp the cylindrical blank 7. The spinning wheel 5 is connected and fixed to the top of the connecting tool holder assembly 6 by threads. The connecting tool holder assembly 6 is fixed to the spinning machine through the threaded hole at the bottom. Since the connecting tool holder assembly 6 is an integral structure, concentricity is ensured. The radial movement of the machine tool makes the spinning wheel 5 and the cylindrical blank 7 concentric, and the axial movement makes the spinning wheel squeeze the cylindrical blank 7, causing it to undergo plastic deformation. The cylindrical blank 7 accumulates and eventually fills the pressure head groove, thus obtaining a cylindrical rotating part with a thickened outer edge. Within a certain range, the blank can completely fill the groove, but when the spinning wheel groove widens, the blank filling area will fold, and the middle and lower parts will become unstable, resulting in defects such as not being able to completely fill the groove.

[0060] In the description of this application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0061] Specific embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the specific embodiments described above, and those skilled in the art can make various changes or modifications within the scope of the claims, which do not affect the essence of the present invention. Unless otherwise specified, the embodiments and features described in this application can be arbitrarily combined with each other.

Claims

1. A die for spin forming with thickened edges on a cylindrical blank, characterized in that, include: The assembly includes a spindle interface flange (1), an inner mold (2), an outer mold (3), positioning bolts (4), a rotating wheel (5), and a connecting tool holder assembly (6). The outer mold (3) is fitted on the outside of the inner mold (2), and the two fit together to form a space for accommodating a cylindrical blank (7). The inner mold (2) is fastened to the spindle interface flange (1), and the outer mold (3) is fastened to the inner mold (2). Multiple positioning holes are provided on the side walls of the inner mold (2), the cylindrical blank (7) and the outer mold (3), and multiple positioning bolts (4) are fixed by passing through the three positioning holes in a horizontal sequence. The inner mold (2) and the outer mold (3) clamp the cylindrical blank (7) together with the positioning bolts (4). The spinning wheel (5) is fastened to the connecting tool holder (6). The spinning wheel (5) is driven by the connecting tool holder (6) to rotate around the central axis of the cylindrical blank (7) and move in the vertical direction. The spinning wheel (5) spins the top of the cylindrical blank (7) to form it.

2. The cylindrical blank edge thickening spinning forming die as described in claim 1, characterized in that, The spindle interface flange (1) is a hollow frustum structure, including a flange and an end interface. The end interface is connected to the machine tool spindle. The inner mold (2) is sleeved on the outside of the end interface and is fastened to the flange.

3. The cylindrical blank edge thickening spinning forming die as described in claim 2, characterized in that, The inner mold (2) includes a smooth inner mold hollow column and an inner mold base. The inner diameter of the inner mold hollow column matches the outer diameter of the end interface. A positioning groove is formed at the center of the inner mold base. A positioning step structure is provided on the flange. The positioning groove is installed on the positioning step structure. Multiple threaded holes passing through the positioning step structure are evenly provided on the bottom inner ring of the flange. The flange is fastened to the inner mold (2) by bolts passing through the threaded holes and positioning groove.

4. The cylindrical blank edge thickening spinning forming die as described in claim 3, characterized in that, The outer mold (3) includes a smooth outer mold hollow column and an outer mold base. The outer mold base is installed on the inner mold base, and the two are provided with a plurality of connecting holes.

5. The cylindrical blank edge thickening spinning forming die as described in claim 4, characterized in that, The outer diameter of the flange is larger than the outer diameter of the outer mold (3).

6. The cylindrical blank edge thickening spinning forming die as described in claim 1, characterized in that, Multiple positioning holes are evenly provided on the side walls of the inner mold (2), the cylindrical blank (7) and the outer mold (3) along the circumferential direction. The positioning holes of the cylindrical blank (7) and the outer mold (3) are the same size and larger than the positioning holes of the inner mold (2).

7. The cylindrical blank edge thickening spinning forming die as described in claim 1, characterized in that, The connecting tool holder assembly (6) includes a stepped cuboid structure. The largest step of the connecting tool holder assembly (6) is mounted on the machine tool, and the rotating wheel (5) is fastened to the bottom of the end of the smallest step of the connecting tool holder assembly (6).

8. The cylindrical blank edge thickening spinning forming die as described in claim 1, characterized in that, The bottom end of the connecting tool holder assembly (6) is provided with a mounting groove, the rotating wheel (5) is provided with multiple countersunk holes, the mounting groove is provided with multiple mounting holes corresponding to the countersunk holes, and the rotating wheel (5) is fastened to the connecting tool holder assembly (6) by bolts.

9. The cylindrical blank edge thickening spinning forming die as described in claim 1, characterized in that, The bottom of the spinning wheel (5) is provided with a pressure head groove, which is arc-shaped and the curvature of the pressure head groove matches the cylindrical blank (7).

10. A method for using a spinning die for thickening the edge of a cylindrical blank, characterized in that, The method of using the cylindrical blank edge thickening spinning forming die according to any one of claims 1-9 includes the following steps: Step S1: First, fasten the inner mold (2) onto the spindle interface flange (1), then put the cylindrical blank (7) onto the inner mold (2), while ensuring that the positioning hole of the cylindrical blank (7) corresponds to the positioning hole of the inner mold (2). Then, put the outer mold (3) onto the outside of the cylindrical blank (7) and fasten it to the inner mold (2). Finally, use multiple positioning bolts (4) evenly distributed along the circumference to pass through the positioning holes to fix the inner mold (2), the cylindrical blank (7) and the outer mold (3), thereby clamping the cylindrical blank (7). Step S2: Install the spinning wheel (5) at the top of the connecting tool holder assembly (6). The connecting tool holder assembly (6) is fixed on the spinning machine. The machine moves radially to make the spinning wheel (5) concentric with the cylindrical blank (7). Then, it moves axially to make the spinning wheel (5) squeeze the cylindrical blank (7), causing the cylindrical blank (7) to undergo plastic deformation. The cylindrical blank (7) accumulates and eventually fills the pressure head groove of the spinning wheel (5), thereby obtaining a cylindrical rotating part with thickened outer edge.

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