A forming device and forming method of a ring part

Abstract

The present invention relates to the technical field of manufacturing and forming, and provides a forming device and forming method for thin-walled annular parts, the structure comprising: a fixed seat, a driving roller and a forming roller movably connected to the fixed seat, and a driving part, the forming roller is nested in the inner cavity of the driving roller, the driving part is connected to the driving roller through the driving roller, and also includes a core roller that feeds along the radial direction of the forming roller. The forming device of the rotating body according to the embodiment of the present invention solves the problem of difficulty in forming thin-walled rotating bodies, realizes the production of thin-walled rotating bodies, solves the problem of plastic instability, and breaks through the limitation on the wall thickness of thin-walled parts.

Description

Technical Field

[0001] The present invention relates to the field of manufacturing rotating bodies, and more specifically, to a forming device and a forming method of a rotating body for a thin-walled annular part. Background Art

[0002] The rotating bodies in ring parts are widely used in many industrial fields such as aerospace, petrochemical, energy and transportation, shipbuilding, weapons, metallurgy, etc. At present, the production process of rotating bodies mainly adopts rolling. The rolling of rotating bodies is mainly carried out on vertical ring rolling machines or horizontal ring rolling machines. The rolling of rotating bodies is the main manufacturing technology for various seamless rotating bodies such as bearing rings, gear rings, flange rings, aircraft engine casings, and gas engine sealing rings.

[0003] There are currently four methods for forming a rotating body: horse frame expansion, rolling forming, rolling followed by shaping, and flash welding forming, among which:

[0004] Horse frame expansion, using simple tooling such as horse frames and horse bars to locally deform the prepared ring blank, so that the outer diameter of the ring blank continues to increase and the wall thickness continues to decrease. This is a free forging ring forging production process;

[0005] Ring rolling forming, also known as ring expansion, is a plastic processing technology that uses ring rolling equipment to make the ring produce continuous local plastic deformation, thereby achieving radial wall thickness reduction, inner and outer diameter expansion, and cross-sectional profile forming. When the ring is rolled, the driving roller performs a rotating rolling motion, the core roller performs a radial linear feed motion, the centering roller applies force on the outer circumference of the ring to achieve centering, and the end face roller performs a rotating end face rolling motion and an axial feed motion to keep the end face of the ring in a horizontal state;

[0006] Flash welding rings use extruded profiles as materials, bend the profiles, and then shape the joints at the intended welding locations. A special flash welding machine is used for butt welding. The shape and roundness of the rings after butt welding are irregular, so a bulging machine is used to bulge and calibrate the rings.

[0007] However, the above processing technologies all have certain limitations:

[0008] The ring is formed by the way of horse frame expansion. Due to continuous hammering on the outer diameter area, the ring has a certain degree of hammer mark. The dimensional accuracy of the ring cannot be accurately controlled, and it is easy to appear elliptical. The process margin of the product from forging to rough processing is large;

[0009] In vertical or horizontal ring rolling machine production, the main roller, centering roller and ring are in circumscribed circle contact. Since the centering roller applies pressure on the outer circumference of the ring, there is a minimum ring wall thickness required by the ring stiffness condition. When the minimum ring wall thickness requirement is not met, the ring is plastically unstable and is pressed into an ellipse or flattened. (Chapter 2, Section 1 of the book "Ring Rolling Theory and Technology");

[0010] When the reamer or ring rolling machine produces special-shaped cross-section rings, the wall thickness of the ring is reduced while the inner and outer diameters of the ring are expanded. For complex special-shaped cross-section rings, sufficient deformation is required to achieve cross-sectional material flow filling. Therefore, it is not easy to produce complex special-shaped cross-section rings for thin-walled rings and small and medium-sized rings.

[0011] The use of bulging machines to bulge the inner circle or tooling to shrink the outer circle is mainly to improve the dimensional accuracy of the inner diameter or outer diameter. Since the deformation during the shaping process is small and it is a one-way deformation, it is difficult to improve the situation where the local area of ​​the special-shaped ring is not filled; when the ring is bulged or the outer circle is shrunken, the ring will rebound after being taken out of the tooling die, so the control of dimensional accuracy is still limited to a certain extent;

[0012] Although flash welding can produce thinner-walled rings, it requires specific profiles that are bent, flash-welded, and then expanded to calibrate the profile. The organization and performance of the flash-welded area are somewhat different from those of the main body.

[0013] From the above analysis, it can be seen that there are different problems in the prior art for the forming of rotating bodies with thin wall thickness, and there are certain requirements for the wall thickness of the rotating body after forming. Usually, the minimum wall thickness is 20mm, and the processing accuracy is difficult to guarantee. There are many processing allowances, and defects such as ellipse and bell mouth are prone to occur, and the consistency of the rotating body after forming is poor. At the same time, for the rotating body, when a closed structure is used for forming, due to structural limitations, it is directly caused that the irregular shaped rotating body cannot be taken out. In the forming process of the rotating body of the prior art, the wall thickness is reduced, the local extrusion filling of the special-shaped ring and the diameter increase occur simultaneously, and sufficient deformation is required to achieve the complete filling of the material in the local area of ​​the special-shaped ring, so the complexity of the special-shaped ring is limited.

[0014] Therefore, there is an urgent need for a forming device for an annular rotating body to solve the problem of difficulty in forming thin-walled rotating bodies, realize the production of thin-walled rotating bodies of various materials, solve the problem of plastic instability, break through the limitation on the wall thickness of thin-walled parts, realize full-contact closed rolling, ensure the accurate forming of special-shaped rings, reduce the process margin of thin-walled rotating bodies, and be able to fully fill the materials of various parts of complex special-shaped cross-sections, while solving the problem that irregular-shaped special-shaped rings cannot be removed after forming. Summary of the invention

[0015] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a ring-shaped forming device, which can realize the production of thin-walled rotating bodies of various materials, solve the problem of plastic instability, break through the limitation of the wall thickness of thin-walled parts, realize full-contact closed rolling, meet the forming of complex special-shaped ring parts, ensure the forming accuracy of the rotating body, reduce the process margin of the thin-walled rotating body, and adopt an inner and outer two-layer combined structure to achieve full filling of materials in various parts of complex special-shaped cross-sections, while well solving the problem that the irregular-shaped rotating body with irregular shape cannot be taken out after forming.

[0016] According to a first aspect of an embodiment of the present invention, a forming device for a rotating body of an annular part is provided, comprising: a fixed seat, a driving roller and a molding roller detachably mounted on the fixed seat and movably connected to the fixed seat, and a driving unit drivingly connected to the driving roller and the molding roller, wherein the molding roller is nested in an inner cavity of the driving roller and drivably connected to the driving roller, the driving unit is arranged on the outer peripheral side of the driving roller, and power is transmitted to the molding roller through the driving roller, and also includes a core roller arranged in the inner cavity of the molding roller and capable of feeding motion along the radial direction of the molding roller, and a forming space for placing a workpiece is reserved between the core roller and the molding roller.

[0017] The forming device for a rotating body according to an embodiment of the present invention solves the problem of difficulty in forming thin-walled rotating bodies through the joint action of a core roller and a forming roller, realizes the production of thin-walled rotating bodies of various materials, solves the problem of plastic instability, breaks through the limitation on the wall thickness of thin-walled parts, realizes full-contact closed rolling, ensures accurate forming of the rotating body, and reduces the process margin of thin-walled rotating bodies.

[0018] In some embodiments, the driving portion and the driving roller are connected via a gear transmission.

[0019] In some embodiments, gear teeth are processed on the surfaces of the driving portion and the driving roller, and the driving portion and the driving roller are continuously meshed and operated through the gear teeth processed on their surfaces.

[0020] In some embodiments, the molding roller includes a first molding roller and a second molding roller that are connected as a whole and arranged to move together, the second molding roller is nested inside the first molding roller and arranged coaxially with the first molding roller, wherein the outer surface of the first molding roller is connected to the driving roller, and the inner surface of the second molding roller is the molding surface during molding.

[0021] In some embodiments, the mating surface between the first roller and the second roller is inclined, and the inclination angle is 0.5°-25°.

[0022] In some embodiments, the second type roller adopts a split structure, which is composed of at least two fan-shaped segments, and the fan-shaped segments are combined together to form a complete circle.

[0023] In some embodiments, a measuring roller is also included for real-time detection of the size of the rotating body being processed. The measuring roller is arranged to be retractable along the radial direction of the driving roller. The roller of the measuring roller abuts against the inner wall of the rotating body and moves with the inner circumference of the rotating body.

[0024] In some embodiments, a centering roller for assisting in forming is also included. The centering roller is disposed on the inner circumference of the rotating body and is in follow-up contact with the inner circumference of the rotating body through displacement and / or pressure control.

[0025] In some embodiments, the centering roller includes a first centering roller and a second centering roller, and the first centering roller and the second centering roller are symmetrically distributed along the radial direction of the molding roller.

[0026] In a second aspect, a method for forming a rotating body is also provided, using the above-mentioned rotating body forming device, comprising the following steps:

[0027] S101, placing the rotating body to be processed into a forming roller so that the outer circumference of the rotating body to be processed is inscribed in the inner circle of the forming roller;

[0028] S102, the driving roller is driven by the driving part to rotate the driving roller;

[0029] S103, the core roller is fed along the radial direction of the mold roller under the action of the power source, and the roller of the core roller is followed by the inner circumference of the rotating body around its axis;

[0030] S104, the wall thickness of the rotating body to be processed is reduced and the diameter is increased under the joint action of the core roller and the forming roller, until the outer circumference of the rotating body to be processed fits with the inner circumference of the forming roller and the inner diameter size meets the requirements, or the measuring roller measures the inner circumference of the rotating body in real time, the measured inner diameter meets the requirements, and the outer circumference of the rotating body fits with the inner circumference of the forming roller, and the deformation is completed;

[0031] S105, the core roller retreats, and the driving roller stops rotating until the forming roller, the driving roller, and the rotating body stop rotating;

[0032] S106, ejecting the formed rotating body, or ejecting the forming roller and the formed rotating body together, and then ejecting the rotating body and the second forming roller from the first forming roller, and then completing the separation of the rotating body and the forming roller, and then completing the processing.

[0033] According to the forming method of an embodiment of the present invention, after the outer circumferential surface of the rotating body contacts the surface of the forming roller, the core roller can continue to make a small amount of feeding movement to enable the local area of ​​the cross-section of the special-shaped ring to be completely filled with material. Restricted by the forming roller, the outer diameter of the rotating body no longer grows, and the shape and size of the rotating body can be precisely controlled. The measuring roller measures the inner circumferential diameter size of the rotating body in real time to ensure that the wall thickness of the ring meets the requirements.

[0034] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0036] Figure 1 It is a structural schematic diagram of a ring-shaped member forming device according to an embodiment of the present invention;

[0037] Figure 2 Another schematic structural diagram of the ring-shaped member forming device according to an embodiment of the present invention;

[0038] Figure 3 A schematic structural diagram of a driving roller of a ring-shaped member forming device according to an embodiment of the present invention;

[0039] Figure 4 A schematic diagram of a partial structure of a driving roller of a ring-shaped member forming device according to an embodiment of the present invention;

[0040] Figure 5 A schematic diagram of the structure of the forming roller of the ring-shaped member forming device according to an embodiment of the present invention;

[0041] Figure 6 Another schematic diagram of the structure of the forming roller of the ring-shaped member forming device according to an embodiment of the present invention;

[0042] Figure 7 It is a schematic structural diagram of the ejection device of the ring-shaped part forming device according to an embodiment of the present invention.

[0043] Reference numerals:

[0044] Fixed seat 10, driving roller 20, first driving roller 21, second driving roller 22, forming roller 30, first forming roller 31, second forming roller 32, driving unit 40, core roller 50, measuring roller 60, centering roller 70, first centering roller 71, second centering roller 72, balancing roller 80, first balancing roller 81, second balancing roller 82, bottom plate 90, ejection device 91, rotating body 100.

[0045] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0046] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0047] The disclosure below provides many different embodiments or examples to implement different structures of the present invention. In order to simplify the disclosure of the present invention, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present invention. In addition, the present invention can repeat reference numbers and / or letters in different examples. This repetition is for the purpose of simplicity and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the present invention provides various specific processes and examples of materials, but those of ordinary skill in the art can be aware of the applicability of other processes and / or the use of other materials.

[0048] Reference below Figures 1 to 5 A ring-shaped member forming device according to an embodiment of the present invention is described.

[0049] like Figure 1 and Figure 2As shown, the forming device of the rotating body of the ring-shaped part of the embodiment of the present invention is used for processing and forming the rotating body 100, including: a fixed seat 10, a driving roller 20 and a molding roller 30 which are detachably mounted on the fixed seat 10 and movably connected to the fixed seat 10, and a driving part 40 which is drivingly connected to the driving roller 20 and the molding roller 30, wherein the molding roller 30 is nested in the inner cavity of the driving roller 20 and is drivably connected to the driving roller 20, the driving part 40 is arranged on the outer peripheral side of the driving roller 20, and power is transmitted to the molding roller 30 through the driving roller 20, and also includes a core roller 50 which is arranged in the inner cavity of the molding roller 30 and can perform feeding movement along the radial direction of the molding roller 30, and a molding space for placing a workpiece is reserved between the core roller 50 and the molding roller 30. According to the forming device for a rotating body of an embodiment of the present invention, the rotating body 100 to be processed is placed between the core roller 50 and the mold roller 30, and the driving unit 40 drives the mold roller 30 to rotate through the driving roller 20. At the same time, the core roller 50 feeds along the radial direction of the mold roller 30. Under the joint action of the mold roller 30 and the core roller 50, the rotating body 100 is squeezed and deformed, and then the wall thickness gradually decreases and the diameter gradually increases. When the target wall thickness is reached, the core roller 50 moves away from the mold roller 30 along the radial direction of the mold roller 30, and the forming of the rotating body 100 is completed. According to the forming device for a rotating body of an embodiment of the present invention, through the joint action of the core roller 50 and the mold roller 30, the problem of difficulty in forming a thin-walled rotating body is solved, the production of thin-walled rotating bodies of various materials is realized, the problem of plastic instability is solved, the limitation on the wall thickness of thin-walled parts is broken through, full-contact closed rolling is realized, the forming accuracy of the rotating body is ensured, and the process margin of the thin-walled rotating body is reduced.

[0050] In some embodiments of the present invention, Figure 3 As shown, in order to improve the transmission efficiency and realize the transmission of large torque, the driving part 40 and the driving roller 20 are connected through gear transmission. Preferably, specifically, the surfaces of the driving part 40 and the driving roller 20 are processed with gear teeth, and the driving part 40 and the driving roller 20 are continuously meshed and operated through the gear teeth processed on their surfaces. In some embodiments of the present invention, as Figure 1 , Figure 2 and Figure 4 As shown, the fixed seat 10 is processed with a mounting seat, and the driving roller 20 is movably connected to the mounting seat of the fixed seat 10 through a bearing. Preferably, the mounting seat of the fixed seat 10 is processed into a circle, and a bearing is sandwiched between the contact surface with the driving roller 30. Further, in order to reduce the up and down movement during operation and offset the eccentric load caused by uneven load, three groups of bearings are used, which are respectively arranged on the upper and lower sides of the mounting seat of the fixed seat 10, and between the mounting seat of the fixed seat 10 and the contact surface of the peripheral side of the driving roller 20. The driving roller 20 is an integrated or split structure.

[0051] Optionally, for the convenience of processing and installation, the drive roller 20 adopts a split design, including a first drive roller 21 and a second drive roller 22 that are connected as a whole with a coaxial line and are arranged to move together. The outer diameter of the connecting end of the first drive roller 21 and the second drive roller 22 is smaller than the outer diameter of the second drive roller 22, forming an open cavity for connecting to the fixed seat 10.

[0052] It can be understood that the opening size of the cavity formed at the connecting end of the first driving roller 21 and the second driving roller 22 is adapted to the size of the boss of the fixing seat 10 .

[0053] In some embodiments of the present invention, Figure 4 As shown, the opening of the cavity formed at the connection end of the first driving roller 21 and the second driving roller 22 is larger than the size of the boss of the fixing seat 10. This ensures the stability of the connection between the first driving roller 21 and the second driving roller 22 and the driving roller 20 after they are connected as one.

[0054] In some embodiments of the present invention, the molding roller 30 can be drivably connected to the inner circumference of the driving roller 20, and rotates in the circumferential direction under the action of the driving roller 20, and works together with the core roller 50 to achieve extrusion deformation of the rotating body 100, so that the outer circumference and the upper and lower end surfaces of the rotating body 100 are then in contact with the molding roller 30 until the outer surface of the rotating body 100 fills the inner circle of the molding roller 30, so that the size of the outer surface of the rotating body 100 is the same as the current size of the inner circle of the molding roller 30, and the processing and forming of the rotating body 100 is completed. Therefore, the inner circle of the molding roller 30 is used as the limit of the closed loop, which ensures the forming accuracy and realizes high-precision and low-residue forming processing, which well overcomes the problem that the existing rotating body is prone to defects such as ellipse and bell mouth during the processing.

[0055] Preferably, the molding roller 30 is detachably arranged from the driving roller 20. Specifically, the molding roller 30 is detachably arranged in contact with the driving roller 20 in the radial direction, so that the molding roller 30 can be separated in the radial direction of the molding roller under the action of force, so that the molding roller 30 of different specifications and sizes can be replaced to meet the molding requirements of the rotating body with different size requirements.

[0056] In some embodiments of the present invention, Figure 4As shown, the mold roller 30 can be various appropriate structures. For example, the mold roller 30 can be formed as a whole after material removal processing, or it can be a ready-made whole after combining multiple parts. Specifically, the mold roller 30 includes a first mold roller 31 and a second mold roller 32 connected as a whole and arranged to move together. The second mold roller 32 is nested inside the first mold roller 31 and arranged coaxially with it, wherein the outer surface of the first mold roller 31 is connected to the driving roller 20, and the inner surface of the second mold roller 32 is the molding surface during molding. In this way, by designing the mold roller 30 as a split combination structure, it is convenient to realize the processing of the mold roller 30 and the processing of the rotating body with special surface requirements. Optionally, the matching surface between the first mold roller 31 and the second mold roller 32 is inclined, and the inclination angle is 0.5°-20°. Optionally, the second mold roller 32 adopts a petal structure, which is composed of at least two fan-shaped segments, and the fan-shaped segments are combined into a complete circle. Therefore, by adopting a split design for the second roller 32, after rolling is completed, the second roller 32 is ejected from the first roller 31 together with the rotating body 100, and then the blocks of the second roller 32 are taken out separately, so that a complete special-shaped cross-section rotating body can be obtained, which can effectively solve the industry problem of the difficulty in taking out the special-shaped rotating body with irregular outer surface after rolling in the prior art.

[0057] In the above embodiments of the present application, the forming roller provided by the present invention is designed to be detachable from the driving roller, thereby facilitating the replacement of forming rollers of different sizes to meet the forming requirements of the same size; the forming roller with a split design facilitates the processing of rotating bodies with special surface requirements, and the combined second forming roller can be used to remove the rotating body with a special cross-section after forming, thereby solving the industry problem of the difficulty in removing the special-shaped rotating body with irregular outer surface after rolling in the prior art.

[0058] In some embodiments of the present invention, Figure 1 and Figure 2 As shown, it also includes a measuring roller 60 for real-time detection of the size of the rotating body 100 being processed. The measuring roller 60 is arranged to be retractable along the radial direction of the driving roller 20. The roller of the measuring roller 60 abuts against the inner wall of the rotating body 100 and moves with the inner circle of the rotating body 100.

[0059] It can be understood that the measuring roller 60 includes a fixed bracket, a movable rotor movably arranged on the fixed bracket, the fixed bracket is marked with scales, and the movable rotor abuts against the inner side wall of the rotating body 100 and moves therewith. Therefore, by the movable rotor abutting against the inner side wall of the rotating body 100, in the process of following the inner side wall of the rotating body, the position of its fixed bracket also changes accordingly, and the change of the inner diameter size of the rotating body 100 can be detected in real time through the scales marked thereon.

[0060] In some embodiments of the present invention, Figure 1 and Figure 2 As shown, it also includes a centering roller 70 for assisting the forming, which is arranged on the inner circle side of the rotating body 100 and is in follow-up contact with the inner circumference of the rotating body (100) through displacement and / or pressure control. In this way, the centering roller 70 can better maintain the stability of the rotating body 100 during the forming process to ensure the quality of the forming. Preferably, the centering roller 70 includes at least two groups of centering rollers to achieve better positioning of the rotating body 100. Specifically, the centering roller 70 includes a first centering roller 71 and a second centering roller 72, and the first centering roller 71 and the second centering roller 72 are symmetrically distributed along the radial direction of the molding roller 30; further, the first centering roller 71 and the second centering roller 72 are symmetrically distributed along the center line of the core roller 50 and the molding roller 30. Preferably, the line connecting the centers of the first centering roller 71 and the second centering roller 72 is perpendicular to the line connecting the core roller 50 and the center point of the rotating body 100 in an ideal state. In this way, it is ensured that the center of the rotating body 100 is always in a continuous change on the center line of the core roller 50 and the molding roller 30 during the forming process, so that the change of the status quo during the deformation process is in a steady state.

[0061] Furthermore, in some embodiments of the present invention, Figure 1 and Figure 2 As shown, the balancing roller 80 is also included to keep the force stable during operation. The balancing roller 80 is arranged on the same side of the driving part 40 and abuts against the outer circumferential surface of the driving roller 20. Therefore, the balancing roller 80 arranged on the same side as the driving part 40 can well withstand the load impact of the driving roller 40 during the transmission process and offset the motion load component. It can be understood that the balancing roller 80 can be composed of a single roller or multiple rollers. For example, in a preferred embodiment of the present invention, the balancing roller 80 includes a first balancing roller 81 and a second balancing roller 82, wherein the first balancing roller 81 and the second balancing roller 82 are symmetrically arranged along the radial direction of the driving roller 40.

[0062] Furthermore, in some embodiments of the present invention, Figure 6 As shown, in order to facilitate the convenience and accuracy of positioning the rotating body 100 when it is placed, it also includes a bottom plate 90 arranged at the bottom end of the mold roller 30 and located inside the fixed seat 10. The bottom plate 90 is circular as a whole and includes at least one group of brackets extending and distributed along the radial direction. The brackets are distributed along the circumference of the bottom plate 90 at intervals, so that the rotating body 100 can be prevented from falling during the processing process through the brackets extending and distributed along the radial direction, and the accurate positioning between the rotating body 100 and the mold roller 30 is ensured.

[0063] Furthermore, in some embodiments of the present invention, Figure 6As shown, in order to facilitate the separation of the annular valence 100 after forming, at least one group of ejection devices 91 are arranged at the bottom end of the forming roller 30 and are spaced along the circumference of the forming roller 30. Preferably, the ejection device 91 is a telescopic cylinder, which uses hydraulic or mechanical devices to eject the formed annular member 100 from the forming roller 30, or ejects the formed rotating body 100 and the current roller 30 together. In addition, in some embodiments of the present invention, a power source for providing power to the driving part 40 and the core roller 50 is also included. The power source can be various appropriate devices, such as a driving motor, or a power device with a clutch. The specific positional relationship of the power source or other structural shapes that achieve the same function should be easy for those skilled in the art to conceive, so they will not be described one by one here.

[0064] In the above embodiments of the present application, the forming roller can be separated along the radial direction of the forming roller under the action of force, so that the forming rollers of different specifications and sizes can be replaced to meet the forming requirements of rotating bodies with different size requirements; the separable design between the driving roller and the forming roller is convenient to replace the forming rollers of different sizes to meet the forming requirements of the same size; the split-design forming roller is convenient for processing the rotating body with special surface requirements, and the combined second forming roller can be used to realize the removal of the rotating body with special cross-section after forming, solving the industry problem of the difficulty in removing the irregular outer surface of the rotating body after rolling in the prior art; the movable rotor that rests on the inner wall of the rotating body can detect the change of the inner diameter size of the rotating body in real time; the joint action of the core roller and the forming roller solves the problem of difficulty in forming thin-walled rotating bodies, realizes the production of thin-walled rotating bodies of various materials, solves the problem of plastic instability, breaks through the limitation on the wall thickness of thin-walled parts, realizes full-contact closed rolling, ensures the accurate forming of the rotating body, and reduces the process margin of thin-walled rotating bodies.

[0065] Another aspect of the embodiments of the present application further provides a method for forming a ring-shaped rotating body, which preferably uses the forming device of the above preferred embodiment, comprising the following steps:

[0066] S101, loading the rotating body 100 to be processed into the molding roller 30, so that the outer circumferential surface of the rotating body 100 to be processed is in contact with the inner circle of the molding roller 30;

[0067] S102, the driving roller 20 is driven by the driving unit 40, and the driving roller 30 rotates;

[0068] S103, the core roller 50, under the action of the power source, performs a feeding motion along the radial direction of the mold roller 30, and performs a follow-up motion around its axis and the circumferential surface of the rotating body;

[0069] S104, the wall thickness of the rotating body 100 to be processed is reduced and the diameter is increased under the joint action of the core roller 50 and the molding roller 30, until the outer circumference of the rotating body 100 to be processed is in contact with the inner circumference of the molding roller 30, and the inner diameter meets the requirements;

[0070] S105, the core roller 50 retreats, and the driving roller 40 stops rotating until the forming roller 30, the driving roller 20, and the rotating body 100 stop rotating;

[0071] S106, ejecting the formed rotating body 100, and then completing the processing.

[0072] In some embodiments of the present invention, in some embodiments, before the processing of the rotating body 100 to be processed is completed, it also includes: during the processing, the measuring roller 60 measures the inner circumferential diameter size of the rotating body in real time, the measured inner circle size meets the requirements, and the outer circumferential surface of the rotating body 100 and the inner circumferential surface of the forming roller 30 are fitted, and the deformation is completed.

[0073] In some embodiments of the present invention, when the formed rotating body 100 is a special-shaped rotating body and cannot be ejected, the forming roller 30 and the formed rotating body 100 are ejected together, and then the rotating body 100 and the second forming roller 32 are ejected from the first forming roller 31, and then the rotating body 100 and the forming roller 30 are separated to complete the processing. According to the forming method of the embodiment of the present invention, after the outer circumferential profile of the rotating body 100 contacts the profile of the forming roller 30, the core roller 50 can continue to make a small amount of feeding movement to completely fill the local area of ​​the cross-section of the special-shaped ring. Due to the shape restriction of the forming roller 30, the outer diameter of the rotating body 100 no longer grows, and the shape and size of the rotating body 100 can be precisely controlled locally and / or completely.

[0074] According to the molding method of an embodiment of the present invention, part of the circumferential surface of the rotating body 100 at a height does not contact the molding roller 30, and the remaining part of the rotating body 100 is tightly fitted with the molding roller 30. The rotating body 100 rotates along with the molding roller 3. When the molding surface of the core roller 7 contacts the ring area protruding from the molding roller 3 and applies a feed motion, the spinning effect can be achieved.

[0075] In the description of the present invention, it should be understood that the terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first", "second", and "third" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0076] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0077] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A ring-shaped part forming device, characterized in that: include: A fixed seat (10), a driving roller (20) and a molding roller (30) detachably mounted on the fixed seat (10) and movably connected to the fixed seat (10), and a driving unit (40) drivingly connected to the driving roller (20) and the molding roller (30), wherein the molding roller (30) is nested in the inner cavity of the driving roller (20) and is drivably connected to the driving roller (20), the driving unit (40) is arranged on the outer peripheral side of the driving roller (20), and transmits power to the molding roller (30) through the driving roller (20), and also includes a core roller (50) arranged in the inner cavity of the molding roller (30) and capable of feeding along the radial direction of the molding roller (30), and a molding space for placing a workpiece is reserved between the core roller (50) and the molding roller (30); The molding roller (30) comprises a first molding roller (31) and a second molding roller (32) which are connected as a whole and are arranged to move together, wherein the second molding roller (32) is nested inside the first molding roller (31) and is arranged coaxially therewith, wherein the outer surface of the first molding roller (31) is connected to the driving roller (20), and the inner surface of the second molding roller (32) is the molding surface during molding.

2. The ring-shaped component forming device according to claim 1, characterized in that: The driving part (40) and the driving roller (20) are connected via gear transmission.

3. The ring-shaped member forming device according to claim 2, characterized in that: The surfaces of the driving part (40) and the driving roller (20) are processed with gear teeth, and the driving part (40) and the driving roller (20) are continuously meshed and operated through the gear teeth processed on their surfaces.

4. The ring-shaped component forming device according to claim 1, characterized in that: The matching surface between the first roller (31) and the second roller (32) is arranged to be inclined, and the inclination angle is 0.5°-20°.

5. The ring-shaped component forming device according to claim 1, characterized in that: The second roller (32) adopts a petal-type structure and is composed of at least two sector segments, and the sector segments are combined together to form a complete circle.

6. The ring-shaped component forming device according to claim 1, characterized in that: It also includes a measuring roller (60) for detecting the size of the rotating body (100) being processed in real time. The measuring roller (60) is arranged to be retractable along the radial direction of the driving roller (20). The roller of the measuring roller (60) is pressed against the inner wall of the rotating body (100) and moves along the inner circumference of the rotating body (100).

7. The ring-shaped component forming device according to claim 1, characterized in that: It also includes a centering roller (70) for assisting in forming. The centering roller (70) is arranged on the inner circumference side of the rotating body (100) and is in follower contact with the inner circumference of the rotating body (100) through displacement and / or pressure control.

8. The ring-shaped component forming device according to claim 7, characterized in that: The centering roller (70) comprises a first centering roller (71) and a second centering roller (72), and the first centering roller (71) and the second centering roller (72) are symmetrically distributed along the radial direction of the molding roller (30).

9. A method for forming a ring part, characterized in that: A forming device for an annular member according to any one of claims 1 to 8, comprising the following steps: S101, placing a rotating body (100) to be processed into a forming roller (30) so that the outer circumferential surface of the rotating body (100) to be processed is in contact with the inner circle of the forming roller (30); S102, the driving roller (20) is driven by the driving unit (40) to rotate the driving roller (30); S103, the core roller (50) performs a feeding motion along the radial direction of the mold roller (30) under the action of a power source, and the roller of the core roller (50) performs a follow-up motion around its axis and the inner circumferential surface of the rotating body (100); S104, under the joint action of the core roller (50) and the molding roller (30), the wall thickness of the rotating body (100) to be processed is reduced and the diameter is increased until the outer circumferential surface of the rotating body (100) to be processed is in contact with the inner circumferential surface of the molding roller (30), and the inner diameter size meets the requirements. Or, the measuring roller (60) measures the inner diameter of the rotating body in real time, the measured inner circle size meets the requirements, and the outer circumferential surface of the rotating body (100) and the inner circumferential surface of the forming roller (30) are fitted, and the deformation is completed; S105, the core roller (50) moves backward, and the driving unit (40) stops rotating until the forming roller (30), the driving roller (20), and the rotating body (100) stop rotating; S106, ejecting the formed rotating body (100); Alternatively, the forming roller (30) and the formed rotating body (100) are ejected together, and then the rotating body (100) and the second forming roller (32) are ejected from the first forming roller (31), and then the rotating body (100) and the forming roller (30) are separated, and then the processing is completed.

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