A die for radial rolling

Abstract

The application provides a radial rolling die and relates to the technical field of ring rolling machines. The radial rolling die comprises a center roller, special-shaped dies and a driving module. A plurality of the special-shaped dies are arranged on the center roller along an axis of the center roller and are in sliding connection with the center roller. The driving module is connected with the center roller and is used for driving the plurality of special-shaped dies to move along the axis. The plurality of special-shaped dies are respectively used for rolling workpieces with different cross-sectional shapes. When rolling different workpieces, only the required special-shaped die in the plurality of special-shaped dies needs to be driven by the driving module to move to the workpiece (working position), so that the replacement frequency of the special-shaped die is reduced, the frequency of stopping the ring rolling machine for replacing the special-shaped die is reduced, and the rolling efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of ring rolling mill, in particular to a radial rolling die. BACKGROUND

[0002] The radial rolling mechanism of the ring rolling mill realizes the increase of the ring in the diameter direction by the clamping of the ring by the driving stick and the core roller and the rotation of the ring driven by the rotation of the driving stick. In the rolling of the ring, especially the rolling of the special-shaped ring, different dies need to be replaced according to the special shape of the ring. The existing radial rolling die is a whole die (a whole core roller). When different dies are replaced, the ring rolling mill needs to be stopped, the old core roller is lifted out, and then the new core roller is installed in place. The whole replacement process takes a long time and the rolling efficiency is low. SUMMARY

[0003] The problem solved by the present application is how to improve the rolling efficiency of the radial rolling of the ring rolling mill.

[0004] To solve the above problems, the present application provides a radial rolling die, which comprises a center roller, a special-shaped die and a driving module. A plurality of special-shaped dies are arranged on the center roller along the axis of the center roller and are in sliding connection with the center roller. The driving module is connected with the center roller. The driving module is used to drive the plurality of special-shaped dies to move along the axis. The plurality of special-shaped dies are respectively used to roll workpieces with different cross-sectional shapes.

[0005] Optionally, the axis is arranged in the vertical direction. The radial rolling die further comprises an initial rolling die which is in sliding connection with the center roller and is arranged below the plurality of special-shaped dies. The driving module is in driving connection with the initial rolling die. The driving module is used to drive the plurality of special-shaped dies and the initial rolling die to move along the axis. The initial rolling die is used to rough roll the workpiece.

[0006] Optionally, the special-shaped die comprises an L-shaped special-shaped die and a Y-shaped special-shaped die. The L-shaped special-shaped die is arranged above the Y-shaped special-shaped die. The initial rolling die is arranged below the Y-shaped special-shaped die.

[0007] Optionally, the driving module comprises a digital hydraulic cylinder which drives the initial rolling die, the Y-shaped special-shaped die and the L-shaped special-shaped die to move along the axis through a pin shaft.

[0008] Optionally, the center roller is provided with a cavity structure, the digital hydraulic cylinder is disposed in the cavity structure and the output shaft of the digital hydraulic cylinder is connected to the pin shaft, the center roller is provided with an elongated hole that communicates with the cavity structure and extends along the axial direction, the pin shaft passes through the elongated hole, and the drive module is used to drive the primary rolling die, the Y-shaped die and the L-shaped die to slide along the elongated hole through the pin shaft.

[0009] Optionally, the radial rolling die further includes an intermediate roll, which is configured as a tubular structure. The inner wall of the intermediate roll is sleeved on the central roll and slidably connected to the central roll. The primary rolling die, the Y-shaped die, and the L-shaped die are all sleeved on the outer wall of the intermediate roll. The digital hydraulic cylinder drives the primary rolling die, the Y-shaped die, and the L-shaped die to move synchronously along the axis through the intermediate roll.

[0010] Optionally, the intermediate roll is provided with a shoulder, which supports the initial rolling die, the Y-shaped die, and the L-shaped die.

[0011] Optionally, the intermediate roll is further provided with a limiting structure, which is spaced apart from the shoulder along the axis. The limiting structure and the shoulder are used to restrict the movement of the primary rolling die, the Y-shaped die, and the L-shaped die on the intermediate roll.

[0012] Optionally, the limiting structure is configured as a preload nut, which is threadedly connected to the intermediate roller.

[0013] Optionally, the radial rolling die further includes a preload bolt. The preload nut includes a nut body and a central threaded hole. The central threaded hole is sleeved on the intermediate roll and threadedly connected to the intermediate roll. The nut body is provided with an internal threaded through hole in the axial direction. The preload bolt is threadedly connected to the preload nut through the internal threaded through hole and presses against the L-shaped die to apply a locking force to the preload nut away from the shoulder direction.

[0014] Compared with the prior art, the radial rolling die of the present invention is made up of a variety of irregular shaped dies arranged along the axis of the center roll and all slidably connected to the center roll. The installation of various irregular shaped dies on the center roll is realized, thereby realizing the replacement of the integral core roll. Combined with the drive module connected to the center roll, it can drive the various irregular shaped dies to move along the axis. The drive module realizes the movement of various irregular shaped dies on the center roll. In this way, when rolling different workpieces, it is only necessary to drive the required irregular shaped die among the various irregular shaped dies to move to the workpiece (working position) through the drive module, thereby reducing the number of times the irregular shaped dies need to be changed, thereby reducing the number of times the ring rolling mill is stopped to change irregular shaped dies, thereby improving the rolling efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 Structure diagram of the die for radial rolling in the embodiment of the present application;

[0016] Figure 2 Station diagram of the die for radial rolling in the embodiment of the present application Figure 1 ;

[0017] Figure 3 Station diagram of the die for radial rolling in the embodiment of the present application Figure 2 ;

[0018] Figure 4 Station diagram of the die for radial rolling in the embodiment of the present application Figure 3 .

[0019] BRIEF DESCRIPTION OF DRAWINGS:

[0020] 1 - center roll; 2 - digital hydraulic cylinder; 3 - intermediate roll; 4 - pre-tightening bolt; 5 - pre-tightening nut; 6 - Y-shaped special-shaped die; 7 - L-shaped special-shaped die; 8 - blooming die; 9 - shaft shoulder; 10 - lifting pin; 11 - long hole; 12 - working platform; 13 - workpiece. DETAILED DESCRIPTION

[0021] In order to make the above objectives, characteristics and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application are described in detail below with reference to the drawings.

[0022] In the drawings, the Z axis represents the vertical direction, that is, the up-down position, and the positive direction of the Z axis, that is, the direction in which the arrow of the Z axis points, represents up, and the negative direction of the Z axis, that is, the direction opposite to the positive direction of the Z axis, represents down; the X axis represents the left-right position, and the positive direction of the X axis, that is, the direction in which the arrow of the X axis points, represents the left side, and the negative direction of the X axis, that is, the direction opposite to the positive direction of the X axis, represents the right side; it should be noted that the above-mentioned meanings of the Z axis and the X axis are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0023] It should be noted that the terms "first", "second", and the like in the specification and claims of the present application and the above drawings are used to distinguish similar objects, and do not necessarily have to be used to describe a specific order or sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0024] In combination Figures 1 to 4As shown, the present application provides a radial rolling die, which comprises a center roller 1, profiled dies and a driving module, a plurality of profiled dies are arranged on the center roller 1 along the axis of the center roller 1 and are all in sliding connection with the center roller 1, the driving module is connected with the center roller 1, and the driving module is used to drive the plurality of profiled dies to move along the axis, and the plurality of profiled dies are respectively used to roll workpieces 13 with different cross-sectional shapes.

[0025] Specifically, the plurality of profiled dies can roll the axial cross section of the workpiece 13 into Y-shaped, L-shaped or C-shaped, etc. according to rolling requirements. The plurality of profiled dies are arranged on the center roller 1 along the axis of the center roller 1 in sequence, and the plurality of profiled dies are all in sliding connection with the center roller 1. The driving module can include a motor or a digital hydraulic cylinder 2 (described later), etc. The driving module is connected with the center roller 1. During rolling, the driving module drives the plurality of profiled dies to move along the axis of the center roller 1, that is, when it is necessary to roll a C-shaped shape, the profiled die corresponding to the C-shaped shape is driven by the driving module to move to the position (also can be understood as the working position) of the workpiece 13, and the rolling is completed.

[0026] In this way, by arranging the plurality of profiled dies on the center roller 1 along the axis of the center roller 1 and all in sliding connection with the center roller 1, the installation of the plurality of profiled dies on the center roller 1 is realized, and the replacement of the integral core roller is further realized. In combination with the driving module connected with the center roller 1 and capable of driving the plurality of profiled dies to move along the axis, the driving module realizes the movement of the plurality of profiled dies on the center roller 1. In this way, when rolling different workpieces, only the required profiled die in the plurality of profiled dies needs to be driven by the driving module to move to the workpiece 13 (working position), so as to reduce the replacement frequency of the profiled dies, reduce the replacement frequency of the profiled dies of the ring rolling mill, and thus improve the rolling efficiency.

[0027] Optionally, in combination with Figures 1 to 4 As shown, the axis is arranged in the vertical direction; the radial rolling profiled die further comprises a blooming die 8, the blooming die 8 is in sliding connection with the center roller 1 and is arranged below the plurality of profiled dies, the driving module is in driving connection with the blooming die 8, the driving module is used to drive the plurality of profiled dies and the blooming die 8 to move along the axis, and the blooming die 8 is used to roughly roll the workpiece 13.

[0028] Specifically, the blooming die 8 is sleeved on the center roller 1 and is in sliding connection with the center roller 1, and the blooming die 8 is arranged below the plurality of profiled dies, the driving module is in driving connection with the blooming die 8, and the driving module is used to drive the plurality of profiled dies and the blooming die 8 to move up and down along the axis. The blooming die 8 can be used for rough rolling of the workpiece 13.

[0029] Thus, by arranging the axis in the vertical direction, and driving the driving module to be connected with the blooming mill 8, the driving module drives the various profiled dies and the blooming mill 8 to move along the axis, and the blooming mill 8 is slidingly connected with the central roller 1 and arranged below the various profiled dies, so that when the workpiece 13 is rolled, the blooming mill 8 can first perform preliminary rolling on the workpiece 13, and then move the L-shaped profiled die 6 or the Y-shaped profiled die 7 according to actual use requirements, so as to avoid the impact damage caused by directly rolling the workpiece 13 by the L-shaped profiled die 6 or the Y-shaped profiled die 7, and to protect the L-shaped profiled die 6 or the Y-shaped profiled die 7 to a certain extent.

[0030] Optionally, in combination with Figures 1 to 4 As shown in the figure, the profiled die includes the L-shaped profiled die 6 and the Y-shaped profiled die 7, the L-shaped profiled die 6 is arranged above the Y-shaped profiled die 7, and the blooming mill 8 is arranged below the Y-shaped profiled die 7. Figure 4 As shown in the figure, the Y-shaped profiled die 7 can roll a shape with an L-shaped cross-sectional pattern, and the specific shape is shown in the figure. Figure 3 As shown in the figure.

[0031] Specifically, in the up-down direction of the central roller 1, the lower end of the L-shaped profiled die 6 abuts against the upper end of the Y-shaped profiled die 7, and the lower end of the Y-shaped profiled die 7 abuts against the upper end of the blooming mill 8.

[0032] Thus, by arranging the L-shaped profiled die 6 above the Y-shaped profiled die 7 and arranging the blooming mill 8 below the Y-shaped profiled die 7, the workpiece 13 can be first rolled by the Y-shaped profiled die 7 and then rolled by the L-shaped profiled die 6, so as to realize the transition of the workpiece 13 rolling, thereby facilitating the use of the L-shaped profiled die 6; or the workpiece 13 can be first rolled by the L-shaped profiled die 6 and then rolled by the Y-shaped profiled die 7, so as to realize the transition of the workpiece 13 rolling, thereby facilitating the use of the Y-shaped profiled die 7.

[0033] Optionally, in combination with Figures 1 to 4 As shown in the figure, the driving module includes a digital hydraulic cylinder 2, and the digital hydraulic cylinder 2 drives the blooming mill 8, the Y-shaped profiled die 7, and the L-shaped profiled die 6 to move along the axis through a pin shaft 10.

[0034] Specifically, the digital hydraulic cylinder 2 is connected with the outer wall or the top end of the central roller 1 through bolts, and the digital hydraulic cylinder 2 drives the blooming mill 8, the Y-shaped profiled die 7, and the L-shaped profiled die 6 to move along the axis through the pin shaft 10.

[0035] Thus, by arranging the digital hydraulic cylinder 2 to drive the blooming mill 8, the Y-shaped profiled die 7, and the L-shaped profiled die 6 to move along the axis through the pin shaft 10, the control of the digital hydraulic cylinder 2 is simple, the cost is significantly reduced, and the accuracy is high. Thus, by arranging the digital hydraulic cylinder 2 to drive the blooming mill 8, the Y-shaped profiled die 7, and the L-shaped profiled die 6 to move along the axis through the pin shaft 10, the control of the digital hydraulic cylinder 2 is simple, the cost is significantly reduced, and the accuracy is high.

[0036] Optionally, in combination with Figures 1 to 4 As shown, the center roller 1 is provided with a cavity structure, the digital hydraulic cylinder 2 is arranged in the cavity structure, and the output shaft of the digital hydraulic cylinder 2 is connected with the pin shaft 10. The center roller 1 is provided with a long hole 11 which is in communication with the cavity structure and extends along the axial direction. The pin shaft 10 penetrates the long hole 11. The digital hydraulic cylinder 2 is used to drive the blooming mill 8, the Y-shaped profiled mill 7 and the L-shaped profiled mill 6 to slide along the long hole 11 through the pin shaft 10.

[0037] Specifically, the digital hydraulic cylinder 2 includes a cylinder body and a cylinder rod, that is, the output shaft of the digital hydraulic cylinder 2. The cylinder rod is arranged downward. The cylinder body is connected with the inner wall of the cavity structure through bolts. The lower end of the cylinder rod is connected with the pin shaft 10. The center roller 1 is provided with a long hole 11 which extends along the axial direction. The long hole 11 is in communication with the cavity structure. The pin shaft 10 penetrates the long hole 11. The digital hydraulic cylinder 2 drives the blooming mill 8, the Y-shaped profiled mill 7 and the L-shaped profiled mill 6 to slide along the long hole 11 through the pin shaft 10.

[0038] In this way, the digital hydraulic cylinder 2 is arranged in the cavity structure, and the output shaft of the digital hydraulic cylinder 2 is connected with the pin shaft 10. Thus, the digital hydraulic cylinder 2 can be hidden in the cavity structure of the center roller 1. The center roller 1 is provided with a long hole 11 which is in communication with the cavity structure and extends along the axial direction. The pin shaft 10 penetrates the long hole 11. Thus, the output shaft of the digital hydraulic cylinder 2 can drive the blooming mill 8, the Y-shaped profiled mill 7 and the L-shaped profiled mill 6 to slide along the long hole 11 through the pin shaft 10 in the cavity structure. The digital hydraulic cylinder 2 can be avoided to be exposed, so as to reduce the occupation of the digital hydraulic cylinder 2 to the external space of the center roller 1, and further make the overall structure of the radial rolling mill compact.

[0039] Optionally, in combination with Figures 1 to 4 As shown, the radial rolling profiled mill further includes an intermediate roller 3. The intermediate roller 3 is arranged in a tubular structure. The inner wall of the intermediate roller 3 is sleeved on the center roller 1 and is in sliding connection with the center roller 1. The blooming mill 8, the Y-shaped profiled mill 7 and the L-shaped profiled mill 6 are all sleeved on the outer wall of the intermediate roller 3. The driving module drives the blooming mill 8, the Y-shaped profiled mill 7 and the L-shaped profiled mill 6 to move along the axis synchronously through the intermediate roller 3.

[0040] Specifically, the intermediate roller 3 is arranged in a tubular structure, which includes an inner wall and an outer wall. The inner wall is sleeved on the center roller 1 and is in sliding connection with the center roller 1. The blooming mill 8, the Y-shaped profiled mill 7 and the L-shaped profiled mill 6 are all connected with the outer wall of the intermediate roller 3. The two ends of the pin shaft 10 pass through the long hole 11 and are connected with the intermediate roller 3. The driving module drives the intermediate roller 3 to slide up and down on the center roller 1 through the pin shaft 10. The intermediate roller 3 drives the blooming mill 8, the Y-shaped profiled mill 7 and the L-shaped profiled mill 6 to move along the axis synchronously.

[0041] Thus, by arranging the intermediate roller 3 in a tubular structure, the inner wall of the intermediate roller 3 is sleeved on the center roller 1 and is in sliding connection with the center roller 1, the initial rolling die 8, the Y-shaped special-shaped die 7 and the L-shaped special-shaped die 6 are all connected with the outer wall of the intermediate roller 3, and the intermediate roller 3 and the center roller 1 jointly bear the initial rolling die 8, the Y-shaped special-shaped die 7 and the L-shaped special-shaped die 6, so as to improve the structural strength of the center roller 1 after the driving module is arranged in the center roller 1, and then the driving module drives the initial rolling die 8, the Y-shaped special-shaped die 7 and the L-shaped special-shaped die 6 to move synchronously along the axis, which can further ensure the stability of the intermediate roller 3 supporting the initial rolling die 8, the Y-shaped special-shaped die 7 and the L-shaped special-shaped die 6 during the rolling process.

[0042] Optionally, in combination with Figures 1 to 4 As shown in the figure, the intermediate roller 3 is provided with an axle shoulder 9, and the axle shoulder 9 supports the arrangement of the initial rolling die 8, the Y-shaped special-shaped die 7 and the L-shaped special-shaped die 6.

[0043] Specifically, the axle shoulder 9 is located at the lower end of the intermediate roller 3, and after the initial rolling die 8, the Y-shaped special-shaped die 7 and the L-shaped special-shaped die 6 are sequentially sleeved on the intermediate roller 3, the axle shoulder 9 can support the initial rolling die 8, the Y-shaped special-shaped die 7 and the L-shaped special-shaped die 6. Wherein, the lower end of the axle shoulder 9 can be provided with a connecting seat connected with the pin shaft 10.

[0044] Thus, by arranging the initial rolling die 8, the Y-shaped special-shaped die 7 and the L-shaped special-shaped die 6 on the axle shoulder 9, the axle shoulder 9 can prevent the initial rolling die 8, the Y-shaped special-shaped die 7 and the L-shaped special-shaped die 6 from falling off the lower end of the intermediate roller 3 during the up-and-down movement of the initial rolling die 8, the Y-shaped special-shaped die 7 and the L-shaped special-shaped die 6.

[0045] Optionally, in combination with Figures 1 to 4 As shown in the figure, the intermediate roller 3 is further provided with a limiting structure 5, and the limiting structure 5 is arranged along the axis and is spaced apart from the axle shoulder 9, and the limiting structure 5 and the axle shoulder 9 are used to limit the movement of the initial rolling die 8, the Y-shaped special-shaped die 7 and the L-shaped special-shaped die 6 on the intermediate roller 3.

[0046] Specifically, the limiting structure 5 can be a buckle, a lock or a pre-tightening nut described below and the like. The limiting structure 5 is arranged at the top end of the intermediate roller 3, and a mounting space for the initial rolling die 8, the Y-shaped special-shaped die 7 and the L-shaped special-shaped die 6 is left between the limiting structure 5 and the axle shoulder 9, and after the initial rolling die 8, the Y-shaped special-shaped die 7 and the L-shaped special-shaped die 6 are all connected with the intermediate roller 3, the limiting structure 5 and the axle shoulder 9 clamp the initial rolling die 8, the Y-shaped special-shaped die 7 and the L-shaped special-shaped die 6, so as to limit the movement of the initial rolling die 8, the Y-shaped special-shaped die 7 and the L-shaped special-shaped die 6 on the intermediate roller 3.

[0047] Thus, the limiting structure 5 is spaced apart from the shaft shoulder 9, so that the limiting structure 5 and the shaft shoulder 9 leave installation space for the blooming die 8, the Y-shaped special-shaped die 7 and the L-shaped special-shaped die 6, avoiding interference of the installation of the blooming die 8, the Y-shaped special-shaped die 7 and the L-shaped special-shaped die 6 caused by the limiting structure 5, and further limiting the movement of the blooming die 8, the Y-shaped special-shaped die 7 and the L-shaped special-shaped die 6 on the intermediate roller 3 by the limiting structure 5 and the shaft shoulder 9, so that the stability of the blooming die 8, the Y-shaped special-shaped die 7 and the L-shaped special-shaped die 6 on the intermediate roller 3 can be improved.

[0048] Optionally, in combination with Figures 1 to 4 As shown in the figure, the limiting structure 5 is a pre-tightening nut, and the pre-tightening nut is threadedly connected with the intermediate roller 3.

[0049] Specifically, the top end of the intermediate roller 3 is provided with external threads, the pre-tightening nut is connected with the intermediate roller 3 through the external threads, and the pre-tightening nut can be disassembled by tightening or loosening the pre-tightening nut.

[0050] Thus, the limiting structure 5 is set as a pre-tightening nut, and the pre-tightening nut is threadedly connected with the intermediate roller 3, so that the structure of the limiting structure 5 is simplified, and the pre-tightening nut is convenient to disassemble and assemble, and further enhances the locking ability of the pre-tightening nut through the thread connection between the pre-tightening nut and the intermediate roller 3.

[0051] Optionally, in combination with Figures 1 to 4 As shown in the figure, the radially rolled special-shaped die further comprises a pre-tightening bolt 4, the pre-tightening nut comprises a nut body and a central threaded hole, the central threaded hole is sleeved on the intermediate roller 3 and is threadedly connected with the intermediate roller 3, the nut body is provided with an internal threaded through hole in the axial direction, and the pre-tightening bolt 4 is threadedly connected with the pre-tightening nut through the internal threaded through hole and abuts against the L-shaped special-shaped die 6 to exert a locking force in the direction away from the shaft shoulder 9 on the pre-tightening nut.

[0052] Specifically, the central threaded hole penetrates the nut body along the nut body axis, the nut body is sleeved on the intermediate roller 3 through the central threaded hole and is threadedly connected with the intermediate roller 3, the nut body is provided with an internal threaded through hole in the axial direction, and the pre-tightening bolt 4 is screwed into the internal threaded through hole along the axis, and when the lower end of the pre-tightening bolt 4 abuts against the upper end surface of the L-shaped special-shaped die 6, the L-shaped special-shaped die 6 exerts an upward thrust on the pre-tightening bolt 4 due to the downward rotation of the pre-tightening bolt 4, and the pre-tightening nut bears the upward thrust due to the transmission of force, and the thrust is the locking force in the direction away from the shaft shoulder 9.

[0053] Thus, by sleeving the central threaded hole on the intermediate roller 3 and threadedly connecting with the intermediate roller 3, and threadedly connecting the pre-tightening bolt 4 along the axis of the pre-tightening nut with the pre-tightening nut, after the pre-tightening bolt 4 is screwed and pressed against the L-shaped special-shaped die 6, the pre-tightening bolt 4 can exert a locking force on the pre-tightening nut in the direction away from the shaft shoulder 9, under the action of the pre-tightening force, the pre-tightening bolt 4 avoids loosening of the pre-tightening nut, at the same time, the pre-tightening bolt 4 can further limit the movement of the L-shaped special-shaped die 6, the Y-shaped special-shaped die 7 and the blooming die 8 on the intermediate roller 3.

[0054] Although the present disclosure is disclosed as above, the protection scope of the present disclosure is not limited to this. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present disclosure, and these changes and modifications will fall within the protection scope of the present disclosure.

Claims

1. A radial rolling die, characterized in that, The device includes a center roll (1), shaped dies, and a drive module. Various shaped dies are arranged along the axis of the center roll (1) and are slidably connected to it. The drive module is connected to the center roll (1) and is used to drive the various shaped dies to move along the axis. The various shaped dies are used to roll workpieces (13) with different cross-sectional shapes. The axis is vertical. The radial rolling die also includes a primary rolling die (8), which is slidably connected to the center roll (1) and located below the various shaped dies. The drive module is driven by the primary rolling die (8) and is used to drive the various shaped dies and the primary rolling die (8) to move along the axis. The primary rolling die (8) is used for rough rolling the workpiece (13). The shaped dies include an L-shaped die (6) and a Y-shaped die (7). The irregular mold (6) is located above the Y-shaped irregular mold (7), and the primary rolling mold (8) is located below the Y-shaped irregular mold (7). The driving module includes a digital hydraulic cylinder (2), which drives the primary rolling mold (8), the Y-shaped irregular mold (7), and the L-shaped irregular mold (6) to move along the axis via a pin (10). The center roller (1) is provided with a cavity structure, and the digital hydraulic cylinder (2) is located in the cavity structure and its output shaft is connected to the pin (10). The center roller (1) is provided with an elongated hole (11) that communicates with the cavity structure and extends along the axis. The pin (10) passes through the elongated hole (11), and the digital hydraulic cylinder (2) is used to drive the primary rolling mold (8), the Y-shaped irregular mold (7), and the L-shaped irregular mold (6) to slide along the elongated hole (11) via the pin (10).

2. The radial rolling die according to claim 1, characterized in that, It also includes an intermediate roll (3), which is configured as a tubular structure. The inner wall of the intermediate roll (3) is sleeved on the center roll (1) and slidably connected to the center roll (1). The primary rolling die (8), the Y-shaped die (7) and the L-shaped die (6) are all sleeved on the outer wall of the intermediate roll (3). The driving module drives the primary rolling die (8), the Y-shaped die (7) and the L-shaped die (6) to move synchronously along the axis through the intermediate roll (3).

3. The radial rolling die according to claim 2, characterized in that, The intermediate roll (3) is provided with a shoulder (9), which supports the primary rolling die (8), the Y-shaped die (7) and the L-shaped die (6).

4. The radial rolling die according to claim 3, characterized in that, The intermediate roll (3) is also provided with a limiting structure (5), the limiting structure (5) and the shoulder (9) are spaced apart along the axis, and the limiting structure (5) and the shoulder (9) are used to restrict the movement of the primary rolling die (8), the Y-shaped die (7) and the L-shaped die (6) on the intermediate roll (3).

5. The radial rolling die according to claim 4, characterized in that, The limiting structure (5) is set as a pre-tightening nut, and the pre-tightening nut is threadedly connected to the intermediate roller (3).

6. The radial rolling die according to claim 5, characterized in that, It also includes a preload bolt (4), the preload nut includes a nut body and a central threaded hole, the central threaded hole is sleeved on the intermediate roller (3) and threadedly connected to the intermediate roller (3), the nut body is provided with an internal threaded through hole in the axial direction, the preload bolt (4) is threadedly connected to the preload nut through the internal threaded through hole and presses against the L-shaped mold (6) to apply a locking force to the preload nut away from the shoulder (9).

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