Roll forging die

Abstract

The invention relates to a roll forging die, which can be matched with a driving shaft, and comprises a rolling assembly, a driving assembly and a rolling assembly, the movable assembly is connected with the rolling assembly; the roll forging die comprises a first state and a second state, in the first state, the relative positions of the rolling assembly and the movable assembly are fixed, a closed channel is defined between the movable assembly and the rolling assembly so as to clamp and fix the driving shaft, and the outer wall, deviating from the closed channel, of the rolling assembly can roll the to-be-machined part; and in the second state, the relative position of the movable assembly and the rolling assembly is adjustable so as to release the driving shaft. The roll forging die is convenient to disassemble, assemble and use.

Description

Technical Field

[0001] The present invention relates to the field of processing technology, and particularly to a rotary forging die. Background Art

[0002] The rotary forging die is mainly applied to the blanking process of forgings with large cross-sectional changes in crankshafts.

[0003] However, in the related art, most rotary forging dies are of an integral structure, which is inconvenient for the disassembly and assembly of the rotary forging die during use. Summary of the Invention

[0004] An embodiment of the present invention provides a rotary forging die, which is of a split structure and is convenient for disassembly and assembly during use.

[0005] An embodiment of the present invention provides a rotary forging die that can cooperate with a drive shaft. The rotary forging die includes a rolling component and a movable component. The rolling component can roll a workpiece to be processed. The movable component is connected to the rolling component. The rotary forging die includes a first state and a second state. In the first state, the relative positions of the rolling component and the movable component are fixed, and a closed channel is formed by enclosing between the movable component and the rolling component to clamp and fix the drive shaft, and the outer wall of the rolling component facing away from the closed channel can roll the workpiece to be processed; in the second state, the relative positions of the movable component and the rolling component are adjustable to release the drive shaft.

[0006] In some embodiments, the rolling component includes an arc-shaped rolling body and a first limiting portion, and the first limiting portion is located at both ends in the circumferential direction of the rolling body. The movable component includes an arc-shaped movable body and a second limiting portion, and the second limiting portion is located at both ends in the circumferential direction of the movable body. In the first state, the relative positions of the first limiting portion and the second limiting portion are fixed, and in the second state, the relative positions of the first limiting portion and the second limiting portion are adjustable.

[0007] In some embodiments, the first limiting portion and the second limiting portion are buckled with each other to form a plugging cavity. The rotary forging die further includes a plugging component. In the first state, the plugging component fills the plugging cavity to limit the relative movement of the first limiting portion and the second limiting portion. In the second state, the plugging component gives way to the plugging cavity, and the first limiting portion and the second limiting portion have freedom of movement relative to each other.

[0008] In some embodiments, the first limiting portion is provided with a first limiting groove located in the circumferential direction of the rolling component, and the second limiting portion is provided with a second limiting groove located in the circumferential direction of the movable component. The first limiting groove and the second limiting groove enclose to form a plugging cavity.

[0009] In some embodiments, the first limiting portion includes a first connecting portion and a first protruding portion. The first connecting portion is connected to the rolling body, the first protruding portion extends along the radial direction of the rolling assembly, the first protruding portion is connected to one end of the first connecting portion away from the rolling body, and the first protruding portion and the first connecting portion enclose a first limiting groove.

[0010] In some embodiments, the second limiting portion includes a second connecting portion and a second protruding portion. The second connecting portion is connected to the movable body, the second protruding portion extends along the radial direction of the movable assembly, the second protruding portion is connected to one end of the second connecting portion away from the movable body, and the second protruding portion and the second connecting portion enclose a second limiting groove. In the first state, the first protruding portion extends into the second limiting groove, the second protruding portion extends into the first limiting groove, and the plugging and unplugging assembly is located in the plugging and unplugging cavity between the first protruding portion and the second protruding portion.

[0011] In some embodiments, along the axial direction of the rolling assembly, the size of the second protruding portion is smaller than the size of the second connecting portion. The plugging and unplugging assembly includes a first part and a second part. The first part is matched with the shapes of the first limiting groove and the second limiting groove. The second part is connected to the first part, and the cross-sectional dimension of the second part is larger than the cross-sectional dimension of the first part. In the first state, the first part abuts against the first connecting portion, the second connecting portion, the first protruding portion, and the second protruding portion respectively.

[0012] In some embodiments, the roll forging die further includes an anti-disengagement assembly, which is inserted between the rolling assembly and the movable assembly and is used to prevent the rolling assembly and the movable assembly from sliding relative to each other along the axial direction.

[0013] In some embodiments, the anti-disengagement assembly includes an anti-disengagement hole and an anti-disengagement member. The anti-disengagement hole is located in the circumferential direction of the roll forging die on the first connecting portion and the second connecting portion. The anti-disengagement member can be inserted into the anti-disengagement hole.

[0014] In some embodiments, a connecting groove is provided on the inner circumferential surface of the rolling assembly, and the connecting groove can be clamped with the driving shaft.

[0015] The roll forging die provided by the embodiment of the present invention, through the arrangement of the rolling assembly and the movable assembly, and the two can move relative to each other, switching between the first state and the second state. When it is necessary to roll the workpiece to be processed through the roll forging die, the roll forging die is switched to the first state. When it is necessary to install the roll forging die on the driving shaft or remove the roll forging die from the driving shaft, the roll forging die can be switched to the second state, which can facilitate the disassembly and assembly of the roll forging die. When the roll forging die is working, the working environment temperature is relatively high, resulting in thermal expansion of the driving shaft. The roll forging die in the second state is convenient for disassembling the roll forging die, shortening the waiting time for the roll forging die to cool down, thereby saving the time used in the entire process and improving the efficiency.

[0016] The above description is only an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention, it can be implemented according to the content of the specification. And in order to make the above and other objects, features and advantages of the present invention more obvious and understandable, the specific embodiments of the present invention are specifically described below. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The features, advantages and technical effects of the exemplary embodiments of the present invention will be described below with reference to the drawings.

[0018] Figure 1 is an exploded schematic view of an embodiment of the roll forging die according to an embodiment of the present invention;

[0019] Figure 2 is a plan view of an embodiment of the roll forging die according to an embodiment of the present invention in a first state;

[0020] Figure 3 is a side view of an embodiment of the roll forging die according to an embodiment of the present invention.

[0021] Description of the reference numerals in the drawings:

[0022] 100 Roll pressing assembly;

[0023] 110 Roll pressing body; 120 First limiting part; 121 First limiting groove; 122 First connecting part; 123 First protruding part; A1 Connecting groove;

[0024] 200 Moving assembly;

[0025] 210 Moving body; 220 Second limiting part; 221 Second limiting groove; 222 Second connecting part; 223 Second protruding part; A2 Inserting and unplugging cavity;

[0026] 300 Inserting and unplugging assembly;

[0027] 310 First part; 320 Second part;

[0028] 400 Anti-disengagement assembly;

[0029] 410 Anti-disengagement hole; 420 Anti-disengagement part.

[0030] In the drawings, the same components are denoted by the same reference numerals. The drawings are not drawn to actual scale. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0031] The features and exemplary embodiments of various aspects of the present invention will be described in detail below. In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. However, it will be apparent to those skilled in the art that the present invention may be practiced without some of these specific details. The following description of the embodiments is only intended to provide a better understanding of the present invention by showing examples of the present invention. In the drawings and the following description, at least some of the well-known structures and techniques are not shown in order to avoid unnecessarily obscuring the present invention; and, for clarity, the dimensions of some structures may be exaggerated. In addition, the features, structures, or characteristics described hereinafter may be combined in any suitable manner in one or more embodiments.

[0032] The orientation terms appearing in the following description are all the directions shown in the drawings and do not limit the specific structure of the present invention. In the description of the present invention, it should also be noted that, unless otherwise clearly defined and limited, the terms "mounted" and "connected" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be directly connected or indirectly connected. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] Roll forging dies are mainly applied to the billet-making process of forgings with large cross-sectional changes such as crankshafts. However, in the related art, most roll forging dies are of an integral structure, which is inconvenient for the disassembly and assembly of the roll forging die during use.

[0034] Based on the above considerations, in order to solve the problem that most roll forging dies are of an integral structure and are inconvenient for the disassembly and assembly of the roll forging die during use, a roll forging die is proposed.

[0035] Please refer to Figures 1 to 3 as shown Figure 1 is an exploded schematic view of an embodiment of the roll forging die of the embodiment of the present invention, Figure 2 is a plan schematic view of an embodiment of the roll forging die of the embodiment of the present invention in a first state, Figure 3 is a side view schematic view of an embodiment of the roll forging die of the embodiment of the present invention.

[0036] An embodiment of the present invention provides a roll forging die that can cooperate with a drive shaft. The roll forging die includes a roll pressing assembly 100 and a movable assembly 200. The roll pressing assembly 100 can perform roll pressing on a workpiece to be processed. The movable assembly 200 is connected to the roll pressing assembly 100. The roll forging die includes a first state and a second state. In the first state, the relative positions of the roll pressing assembly 100 and the movable assembly 200 are fixed, and a closed channel is formed by enclosing between the movable assembly 200 and the roll pressing assembly 100 to clamp and fix the drive shaft, and the outer wall of the roll pressing assembly 100 facing away from the closed channel can perform roll pressing on the workpiece to be processed; in the second state, the relative positions of the movable assembly 200 and the roll pressing assembly 100 are adjustable to release the drive shaft.

[0037] The roll pressing assembly 100 and the movable assembly 200 can be connected by hinge to realize the switching between the first state and the second state. The roll pressing assembly 100 and the movable assembly 200 can be connected by buckling to realize the switching between the first state and the second state. Optionally, the relative positions of both ends of the roll pressing assembly 100 and both ends of the movable assembly 200 are adjustable. One end between the roll pressing assembly 100 and the movable assembly 200 is connected by buckling, and the other end is connected by hinge. In addition, one end between the roll pressing assembly 100 and the movable assembly 200 is connected by buckling, and the other end can also be connected by buckling.

[0038] Optionally, the wall surfaces of the roll pressing assembly 100 and the movable assembly 200 have a plurality of lifting holes, and the lifting holes are used to install the roll forging die by lifting, which is convenient for installation and disassembly.

[0039] The adjustable relative position of the movable assembly 200 and the roll pressing assembly 100 includes that the movable assembly 200 can move radially along the roll forging die relative to the roll pressing assembly 100, and the movable assembly 200 can move circumferentially along the roll forging die relative to the roll pressing assembly 100, etc.

[0040] The drive shaft can drive the roll pressing assembly 100 to move axially, so that the outer wall of the roll pressing assembly 100 performs roll pressing on the workpiece to be processed, and the shape of the outer wall of the roll pressing assembly 100 can be adjusted according to actual needs.

[0041] Optionally, the closed channel includes a columnar channel, and the drive shaft includes a columnar shaft. In the first state, the size of the closed channel matches the size of the drive shaft.

[0042] The movable assembly 200 can include a base frame and a fixed beam. The fixed beam is connected between the base frames, so that the movable assembly 200 has high strength and can make the roll forging die lightweight.

[0043] Usually during the use of the roll forging die, the drive shafts are arranged in pairs. At least one roll forging die is installed on one drive shaft, and the roll forging dies installed on the paired drive shafts cooperate with each other to perform press forming on the workpiece to be processed through the outer walls of the roll forging dies.

[0044] The roll forging die provided by the embodiment of the present invention, through the settings of the rolling component 100 and the movable component 200, and the two can move relative to each other, switching between the first state and the second state. When it is necessary to roll a workpiece to be processed through the roll forging die, the roll forging die is switched to the first state. When it is necessary to install the roll forging die on the drive shaft or remove the roll forging die from the drive shaft, the roll forging die can be switched to the second state, which can facilitate the disassembly and assembly of the roll forging die. When the roll forging die is working, the working environment temperature is usually relatively high, resulting in the drive shaft being prone to thermal expansion. The roll forging die in the second state facilitates the disassembly of the roll forging die, shortens the waiting time for the roll forging die to cool down, thereby saving the time used in the entire process and improving efficiency.

[0045] In some embodiments, in the second state, an activity channel is formed by enclosing between the movable component 200 and the rolling component 100, and the radial dimension of the closed channel is smaller than the radial dimension of the activity channel.

[0046] In the second state, the setting that an activity channel is formed by enclosing between the movable component 200 and the rolling component 100 can achieve the effect that the radial dimension of the activity channel is larger than the radial dimension of the closed channel on the premise that the movable component 200 maintains a small amount of movement, which facilitates the switching between the first state and the second state and saves the operating cost.

[0047] In some embodiments, the rolling component 100 includes an arc-shaped rolling body 110 and a first limiting part 120. The first limiting part 120 is located at both circumferential ends of the rolling body 110. The movable component 200 includes an arc-shaped movable body 210 and a second limiting part 220. The second limiting part 220 is located at both circumferential ends of the movable body 210. In the first state, the relative positions of the first limiting part 120 and the second limiting part 220 are fixed. In the second state, the relative positions of the first limiting part 120 and the second limiting part 220 are adjustable.

[0048] Exemplarily, the first limiting part 120 and the second limiting part 220 can be connected by a buckle to fix the relative positions of the two, and the restriction between the first limiting part 120 and the second limiting part 220 can be released by the buckle to make the relative positions of the first limiting part 120 and the second limiting part 220 adjustable.

[0049] Optionally, the movable body 210 includes a base frame and a reinforcing member. The base frame is arranged along the circumference of the movable component 200, and the base frame is connected between the first connecting parts 122. The reinforcing member is arranged axially between the base frames.

[0050] Optionally, in the first state of the roll forging die, the shape of the closed channel includes a cylindrical shape, and the circumferential dimension of the arc-shaped rolling body 110 accounts for more than one-third of the circumferential dimension of the entire roll forging die.

[0051] The roll forging die provided by the embodiment of the present invention is provided with an arcuate shape of the rolling body 110 and the movable body 210, which is convenient for adapting to the driving shaft. And a first limiting portion 120 is provided at both circumferential ends of the rolling body 110, and a second limiting portion 220 is provided at both circumferential ends of the movable body 210, which can conveniently realize the switching of the roll forging die between the first state and the second state.

[0052] In some embodiments, the first limiting portion 120 and the second limiting portion 220 are buckled with each other to form an insertion and extraction cavity A2. The roll forging die further includes an insertion and extraction assembly 300. In the first state, the insertion and extraction assembly 300 fills the insertion and extraction cavity A2 to limit the relative movement of the first limiting portion 120 and the second limiting portion 220. In the second state, the insertion and extraction assembly 300 gives way to the insertion and extraction cavity A2, and the first limiting portion 120 and the second limiting portion 220 have a degree of freedom of movement relative to each other.

[0053] Optionally, when using the roll forging die, the inner diameter dimension of the rolling body 110 is the same as the outer diameter dimension of the driving shaft, the rolling body 110 is in contact with the driving shaft, the inner diameter dimension of the movable body 210 is the same as the outer diameter dimension of the driving shaft, the movable body 210 is in contact with the driving shaft, and the inner diameter dimension of the second limiting portion 220 is greater than the outer diameter dimension of the driving shaft.

[0054] The shape of the insertion and extraction cavity A2 includes but is not limited to a cuboid shape, a cylindrical shape, etc.

[0055] The roll forging die provided by the embodiment of the present invention is provided with an insertion and extraction cavity A2 between the first limiting portion 120 and the second limiting portion 220, and the insertion and extraction assembly 300 can move in the insertion and extraction cavity A2 so that the roll forging die can be switched between the first state and the second state. This is convenient for operating the insertion and extraction assembly 300, the assembly is simple, and the size of the insertion and extraction cavity A2 between the first limiting portion 120 and the second limiting portion 220 can be adjusted to adapt to the size of the driving shaft, thus expanding the application range of the roll forging die.

[0056] In some embodiments, the first limiting portion 120 is provided with a first limiting groove 121, the first limiting groove 121 is located in the circumferential direction of the rolling assembly 100, the second limiting portion 220 is provided with a second limiting groove 221, the second limiting groove 221 is located in the circumferential direction of the movable assembly 200, and the first limiting groove 121 and the second limiting groove 221 enclose to form the insertion and extraction cavity A2.

[0057] The shapes of the first limiting groove 121 and the second limiting groove 221 include but are not limited to a columnar groove, a cuboid groove, etc.

[0058] Optionally, the first limiting groove 121 is located on the inner circumferential surface of the rolling assembly 100, and the second limiting groove 221 is located on the outer circumferential surface of the movable assembly 200.

[0059] The roll forging die provided by the embodiment of the present invention can maintain the strength of the roll forging die and realize the switching between the first state and the second state by providing a first limiting groove 121 in the first limiting part 120 and a second limiting groove 221 in the second limiting part 220.

[0060] In some embodiments, the first limiting part 120 includes a first connecting part 122 and a first protruding part 123. The first connecting part 122 is connected to the roll pressing body 110, the first protruding part 123 extends along the radial direction of the roll pressing assembly 100, the first protruding part 123 is connected to one end of the first connecting part 122 away from the roll pressing body 110, and the first protruding part 123 and the first connecting part 122 enclose to form the first limiting groove 121.

[0061] The connection between the first connecting part 122 and the roll pressing body 110 includes bonding, welding, etc., and the connection between the first protruding part 123 and the first connecting part 122 includes riveting, integral connection, etc.

[0062] The roll forging die provided by the embodiment of the present invention is beneficial to the forming design of the first limiting groove 121 through the arrangement that the first limiting groove 121 is formed by enclosing between the first connecting part 122 and the first protruding part 123.

[0063] In some embodiments, the second limiting part 220 includes a second connecting part 222 and a second protruding part 223. The second connecting part 222 is connected to the movable body 210, the second protruding part 223 extends along the radial direction of the movable assembly 200, the second protruding part 223 is connected to one end of the second connecting part 222 away from the movable body 210, and the second protruding part 223 and the second connecting part 222 enclose to form the second limiting groove 221. In the first state, the first protruding part 123 extends into the second limiting groove 221, the second protruding part 223 extends into the first limiting groove 121, and the plugging and unplugging assembly 300 is located in the plugging and unplugging cavity A2 between the first protruding part 123 and the second protruding part 223.

[0064] The connection between the second connecting part 222 and the movable body 210 includes bonding, welding, etc., and the connection between the second protruding part 223 and the second connecting part 222 includes riveting, integral connection, etc.

[0065] The roll forging die provided by the embodiment of the present invention is convenient for the forming design of the second limiting groove 221 through the arrangement of the second connecting part 222 and the second protruding part 223, and simplifies the structural arrangement in the first state and makes the layout reasonable.

[0066] In some embodiments, along the axial direction of the rolling component 100, the size of the second protruding portion 223 is smaller than that of the second connecting portion 222. The plugging and unplugging component 300 includes a first portion 310 and a second portion 320. The first portion 310 matches the shapes of the first limiting groove 121 and the second limiting groove 221. The second portion 320 is connected to the first portion 310, and the cross-sectional dimension of the second portion 320 is larger than that of the first portion 310. In the first state, the first portion 310 abuts against the first connecting portion 122, the second connecting portion 222, the first protruding portion 123, and the second protruding portion 223 respectively.

[0067] For the roll forging die provided by the embodiment of the present invention, through the arrangements of the first portion 310 and the second portion 320, the first portion 310 abuts against the first connecting portion 122, the second connecting portion 222, the first protruding portion 123, and the second protruding portion 223 in the first state, which can play a role in restricting the relative movement between the movable component 200 and the rolling component 100. Moreover, the cross-sectional dimension of the second portion 320 is larger than that of the first portion 310, which can play a role in limiting the first portion 310 located in the plugging and unplugging cavity A2 and is beneficial to the operation of the plugging and unplugging component 300.

[0068] In some embodiments, the roll forging die further includes an anti-disengagement component 400. The anti-disengagement component 400 is inserted between the rolling component 100 and the movable component 200, and is used to prevent the rolling component 100 and the movable component 200 from sliding relative to each other along the axial direction.

[0069] The anti-disengagement component 400 may include a pin shaft, an anti-disengagement bolt, etc. The number of the anti-disengagement components 400 includes one, two, or even multiple, etc.

[0070] For the roll forging die provided by the embodiment of the present invention, through the arrangement of the anti-disengagement component 400, the amount of axial sliding of the rolling component 100 relative to the movable component 200 can be reduced, and the stability performance of the roll forging die can be enhanced.

[0071] In some embodiments, the anti-disengagement component 400 includes an anti-disengagement hole 410 and an anti-disengagement member 420. The anti-disengagement hole 410 is located in the circumferential direction of the first connecting portion 122 and the second connecting portion 222 along the roll forging die. The anti-disengagement member 420 can be inserted into the anti-disengagement hole 410.

[0072] Optionally, the anti-disengagement hole 410 includes a threaded hole. Correspondingly, the anti-disengagement member 420 is an anti-disengagement bolt, and the cooperation between the anti-disengagement bolt and the threaded hole can be used to prevent the rolling component 100 and the movable component 200 from sliding relative to each other along the axial direction.

[0073] During the use process, when switching the roll forging die in the first state to the second state, at least part of the anti-disengagement member 420 can be first disengaged from the anti-disengagement hole 410, so that the movable component 200 has a degree of freedom of movement relative to the rolling component 100.

[0074] In the roll forging die provided by the embodiment of the present invention, through the arrangement of the anti - detachment hole 410 and the anti - detachment member 420, the amount of axial sliding of the roll - pressing assembly 100 relative to the movable assembly 200 is reduced. The structural arrangement is simple and easy to implement.

[0075] In some embodiments, a connection groove A1 is provided on the inner peripheral surface of the roll - pressing assembly 100, and the connection groove A1 can be clamped with the driving shaft.

[0076] The number of the connection grooves A1 includes one, two, or even more. The shape of the connection groove A1 can be cuboid, spherical, etc., and can be adjusted according to the specific state of the driving shaft.

[0077] In the roll forging die provided by the embodiment of the present invention, through the arrangement of the connection groove A1, the roll forging die is clamped with the driving shaft, and the synchronous movement of the two can be realized, so that the roll forging die rolls the workpiece to be processed.

[0078] Although the present invention has been described with reference to the preferred embodiments, various improvements can be made to it and components therein can be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the technical features mentioned in each embodiment can be combined in any way. The present invention is not limited to the specific embodiments disclosed in the text, but includes all technical solutions falling within the scope of the claims.

Claims

1. A roll forging die that can cooperate with a drive shaft, characterized in that Comprising: A rolling component capable of rolling the workpiece to be processed; A movable component connected to the rolling component; The roll forging die includes a first state and a second state. In the first state, the relative positions of the rolling component and the movable component are fixed, and a closed channel is formed by enclosing between the movable component and the rolling component to clamp and fix the drive shaft, and the outer wall of the rolling component facing away from the closed channel can roll the workpiece to be processed; In the second state, the relative positions of the movable component and the rolling component are adjustable to release the drive shaft.

2. The roll forging die according to claim 1, characterized in that, The rolling component includes an arc-shaped rolling body and a first limiting part. The first limiting part is located at both ends of the circumferential direction of the rolling body. The movable component includes an arc-shaped movable body and a second limiting part. The second limiting part is located at both ends of the circumferential direction of the movable body. In the first state, the relative positions of the first limiting part and the second limiting part are fixed. In the second state, the relative positions of the first limiting part and the second limiting part are adjustable.

3. The roll forging die according to claim 2, wherein, The first limiting part and the second limiting part are buckled with each other and form a plugging cavity. The roll forging die further includes a plugging component. In the first state, the plugging component fills the plugging cavity to limit the relative movement of the first limiting part and the second limiting part. In the second state, the plugging component gives way to the plugging cavity, and the first limiting part and the second limiting part have freedom of movement relative to each other.

4. The roll forging die according to claim 3, wherein The first limiting part is provided with a first limiting groove located in the circumferential direction of the rolling component. The second limiting part is provided with a second limiting groove located in the circumferential direction of the movable component. The first limiting groove and the second limiting groove enclose to form the plugging cavity.

5. The roll forging die according to claim 4, characterized in that, The first limiting part includes: A first connecting part connected to the rolling body; A first protruding part extending along the radial direction of the rolling component. The first protruding part is connected to one end of the first connecting part away from the rolling body. The first protruding part and the first connecting part enclose to form the first limiting groove.

6. The roll forging die according to claim 5, wherein The second limiting part includes: A second connecting part connected to the movable body; A second protruding part extending along the radial direction of the movable component. The second protruding part is connected to one end of the second connecting part away from the movable body. The second protruding part and the second connecting part enclose to form the second limiting groove. In the first state, the first protruding part extends into the second limiting groove, and the second protruding part extends into the first limiting groove. The plugging component is located in the plugging cavity between the first protruding part and the second protruding part.

7. The roll forging die according to claim 6, characterized in that, Along the axial direction of the rolling component, the size of the second protruding part is smaller than the size of the second connecting part. The plugging component includes: A first part matching the shapes of the first limiting groove and the second limiting groove; A second part connected to the first part, and the cross-sectional size of the second part is larger than the cross-sectional size of the first part. In the first state, the first part abuts against the first connecting part, the second connecting part, the first protruding part, and the second protruding part.

8. The roll forging die according to claim 7, characterized in that, The roll forging die further includes an anti - detachment component, which is inserted between the roll - pressing component and the movable component, and is used to prevent the relative axial sliding between the roll - pressing component and the movable component.

9. The roll forging die according to claim 8, wherein, The anti - detachment component includes: Anti - detachment holes, which are located circumferentially along the roll forging die on the first connecting part and the second connecting part; Anti - detachment pieces, which can be inserted into the anti - detachment holes.

10. The roll forging die according to claim 1, characterized in that, A connecting groove is provided on the inner peripheral surface of the roll - pressing component, and the connecting groove can be clamped with the driving shaft.

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