A core roller assembly and ring rolling machine for rolling a profiled ring

Abstract

The present application relates to the field of metal ring forming, in particular to a core roller assembly for rolling special-shaped ring pieces; comprising a core shaft and a core roller outer die slidingly sleeved outside the core shaft, the core shaft has a lower end and an upper end, one side of the core shaft close to the lower end has a positioning part, the first end of the core roller outer die abuts against the positioning part, the second end of the core roller outer die has a limiting boss, and the side of the limiting boss away from the positioning part is connected with an elastic floating mechanism; so that the core roller outer die can float up and down along the core shaft in the process of rolling special-shaped rings; so as to ensure that the limiting boss and the forged ring do not cause the jamming phenomenon caused by excessive friction force, and the forged ring is not limited by positioning, so that the processing forged ring piece does not cause the distortion of the processing forged ring piece.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of metal ring forming, in particular, to a core roller assembly for rolling a shaped ring piece. Furthermore, the present application also relates to a ring rolling machine comprising the core roller assembly for rolling a shaped ring piece. BACKGROUND

[0002] Metal shaped ring pieces are widely used in aerospace, automotive, marine and energy industries, so the production capacity of shaped ring pieces directly reflects the industrial level of the related fields. Compared with other ring piece processing methods, the radial-axial ring piece rolling forming technology has the characteristics of economy, high processing efficiency and good product quality, so it has become the main production method of metal ring pieces. In order to reduce the size of the ingot, obtain better billet quality, and reduce the cutting allowance to improve the mechanical properties of the ring piece, the shaped cross-section ring piece rolling process is the main research direction of large ring piece production at present.

[0003] Since the wall thickness of the metal shaped ring piece gradually decreases and the outer diameter increases during the forming process, axial force will inevitably occur during the rolling process. For the rolling of asymmetric cross-sections and large ring pieces, in order to offset the axial force generated during the rolling process of the shaped core roller and obtain a stable rolling process, the shaped core roller usually has a closed structure, i.e. a stopper is arranged at both ends of the core roller rolling area. However, the double-sided full-closed structure has the following defects: first, the surface of the initial ring piece may not be flat and the deformation is mainly axial expansion. Since the ring piece is continuously rotating, the full-closed structure will contact the protruding area of the ring piece, which will cause excessive friction between the full-closed structure and the ring piece. Therefore, the rolling of the shaped ring requires high dimensional accuracy of the initial forging, which increases the cost and reduces the production efficiency. Second, due to the continuous extrusion of the shaped ring piece, axial force is generated. When the axial force is too large, the thickness of the ring piece increases, which will also cause excessive friction between the double-sided full-closed structure and the ring piece, resulting in slipping and interrupting the processing process.

[0004] In summary, designing a core roller assembly for rolling a shaped ring piece can adapt to the axial expansion of the ring piece and make the axial float, and at the same time, the semi-closed floating core roller device can adjust the adaptability of the core roller outer mold during the rolling process, which is of great significance to improve the rolling efficiency of the shaped ring piece, the forming quality of the ring piece and the rolling stability. SUMMARY

[0005] The present application provides a core roller assembly for rolling a shaped ring piece to solve the technical problem that the current double-sided full-closed structure of the core roller will generate excessive friction between the shaped ring piece during the rolling process, resulting in slipping of the rolling system.

[0006] The technical scheme adopted by the present application is:

[0007] The application provides a core roller assembly for rolling a profiled ring, comprising a core shaft and a core roller outer mold slidingly sleeved outside the core shaft, the core shaft has a lower end and an upper end, one side of the core shaft close to the lower end has a positioning part, a first end of the core roller outer mold abuts against the positioning part, a second end of the core roller outer mold has a limiting boss, and one side of the limiting boss away from the positioning part is connected with an elastic floating mechanism.

[0008] Further, the elastic floating mechanism comprises an elastic member, which is positioned between the limiting boss and the upper end of the core shaft through support positioning to give the limiting boss pressure.

[0009] Further, the elastic floating mechanism further comprises an elastic member adjusting mechanism, which is arranged outside the core shaft to control the axial expansion and / or displacement of the elastic member along the core shaft.

[0010] Further, the elastic member adjusting mechanism comprises a driving member, a transmission assembly, a positioning nut member and a bearing assembly, the output end of the driving member is connected with the input end of the transmission assembly, the output end of the transmission assembly is connected with the positioning nut member to drive the rotation of the positioning nut member, the core shaft comprises a threaded segment for threaded connection with the positioning nut member, the positioning nut member is connected with the bearing assembly, and the other end of the bearing assembly is connected with the elastic member.

[0011] Further, the transmission assembly comprises a worm gear assembly and a gear shaft, the output end of the driving member is connected with the input end of the worm gear assembly, the output end of the worm gear assembly is connected with the gear shaft, the outer side of the positioning nut member is fixedly connected with a gear ring, and the gear of the gear shaft is matched with the gear ring.

[0012] Further, the elastic member adjusting mechanism further comprises a sliding rack, which is slidingly sleeved outside the core shaft, and the driving member and the transmission assembly are arranged on the sliding rack.

[0013] Further, the core shaft sequentially comprises a first optical shaft segment, the positioning part, a first sliding shaft segment, a threaded segment, a second sliding shaft segment and a second optical shaft segment from the first end to the second end, the first sliding shaft segment is used for slidingly installing the core roller outer mold, and the second sliding shaft segment is used for slidingly installing the sliding rack.

[0014] Further, the elastic member adjusting mechanism is a pneumatic cylinder driving assembly, which is used for driving the axial expansion and / or displacement of the elastic member along the core shaft.

[0015] Further, the elastic floating mechanism further comprises an energy component for providing energy, a controller, and a displacement sensor for monitoring the floating stroke of the limiting boss and transmitting the signal to the controller.

[0016] According to another aspect of the present application, there is also provided a ring rolling machine comprising the above-mentioned core roller assembly for rolling a profiled ring.

[0017] The present application has the following advantages:

[0018] The present application has the following advantages: BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is a schematic diagram of the overall structure of the core roller assembly;

[0020] Figure 2 is a schematic diagram of the structure of the core shaft;

[0021] Figure 3 is a schematic diagram of the structure of the core roller outer mold;

[0022] Figure 4 is a schematic diagram of the structure of the bearing assembly;

[0023] Figure 5 is a schematic diagram of the structure of the positioning nut piece;

[0024] Figure 6 is a schematic diagram of the structure of the spring piece adjustment mechanism;

[0025] Figure 7 is an assembly diagram of part of the components on the core shaft;

[0026] Figure 8 is a schematic diagram of the structure of the ring rolling machine.

[0027] BRIEF DESCRIPTION OF DRAWINGS

[0028] 1, core shaft; 2, core roller outer mold; 3, elastic piece; 4, bearing assembly; 5, positioning nut piece;

[0029] 6, spring piece adjustment mechanism; 7, forged ring; 8, driving roller assembly; 9, tapered pinch roller assembly;

[0030] 11, positioning part; 12, first sliding shaft section; 13, threaded section; 14, second sliding shaft section;

[0031] 21. Limiting boss; 22. Second elastic element positioning part;

[0032] 41. Lower washer; 42. Cage; 43. Rolling element; 44. Upper washer; 411. First elastic positioning part;

[0033] 51. Gear ring;

[0034] 61. Sliding frame; 62. Drive unit; 63. Energy component; 64. Controller; 65. Worm gear;

[0035] 66. Worm gear; 67. Gear shaft;

[0036] 611. Annular support boss; 612. Motor mounting platform; 613. Sliding platform. Detailed Implementation

[0037] To facilitate understanding of the present invention by those skilled in the art, specific embodiments of the present invention will be described below with reference to the accompanying drawings.

[0038] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0039] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0040] It should be noted that when a component is said to be "attached" to another component, it can be directly on the other component or it can be in the middle of another component. When a component is said to be "set" to another component, it can be directly set to the other component or it may also be in the middle of another component. When a component is said to be "fixed" to another component, it can be directly fixed to the other component or it may also be in the middle of another component.

[0041] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the specification of this invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "or / and" as used herein includes any and all combinations of one or more of the associated listed items.

[0042] like Figure 1 As shown, the present invention provides a mandrel assembly for rolling irregularly shaped rings, including a mandrel 1 and a mandrel outer mold 2 slidably sleeved on the outside of the mandrel 1. The mandrel 1 can be a solid shaft for providing support; the mandrel outer mold 2 is used to form the irregularly shaped ring to be processed, therefore the mandrel outer mold 2 can be designed to adapt to the shape of the irregularly shaped ring to be rolled; the mandrel 1 has a lower end and an upper end, as shown in the figure. Figure 1 As an example, the upper end is the upper end and the lower end is the lower end; the mandrel 1 has a positioning part 11 on the side near the lower end, and the first end of the outer mold 2 of the mandrel abuts against the positioning part 11, that is, the positioning part 11 is used to support and position the lower end of the outer mold 2 of the mandrel. The second end of the outer mold 2 of the mandrel has a limiting boss 21, and the lower end face of the limiting boss 21 is used to abut against the upper end face of the forging ring 7 to be processed, so as to assist the forming of the forging ring 7; the side of the limiting boss 21 away from the positioning part 11 is connected to an elastic floating mechanism. The elastic floating mechanism allows the outer mold 1 of the mandrel to apply a certain pressure to the limiting boss 21 during the forming of the forging ring to prevent axial movement, while it can also float up and down to prevent the entire ring rolling system from slipping.

[0043] As described above, the outer mold 2 of the core roller is slidably sleeved on the outside of the mandrel 1. The sliding sleeve method can be the cooperation of sliding key and sliding groove, the cooperation of guide key and sliding groove, or the connection of slide rail and slider. There is no limitation on similar sliding connection methods. Preferably, considering the production and manufacturing costs and the actual processing situation that the mandrel needs to rotate continuously, the sliding key and sliding groove or the guide and sliding groove cooperation connection method is adopted.

[0044] like Figure 1 As shown, the elastic floating mechanism includes an elastic element 3, which is connected between the limiting boss 21 and the upper end of the spindle 1 to provide pressure to the limiting boss 21. The elastic element 3 is preferably a linear spring, which is sleeved on the outside of the spindle 1. Of course, the upper end of the spring element 3 is limited by a limit support, otherwise it cannot provide downward pressure.

[0045] Further, the elastic floating mechanism further comprises an elastic member adjusting mechanism 6 arranged outside the mandrel 1 to control the axial expansion and / or displacement of the elastic member 3 along the mandrel 1; the working process is as follows: in the initial stage of the rolling process of the forging ring 7, the elastic member adjusting mechanism gives the elastic member 3 a relatively small pressure, at this time the limit boss 21 is subjected to a relatively small pressure in the axial direction, so the floating range of the forging ring 7 is large, so that the initial size precision requirement of the device for the forging ring 7 is low, even if the surface of the forging ring is not very smooth, it will not be stuck, which reduces the processing cost of the forging ring; at the same time, due to the large axial deformation of the forging ring 7 in the initial stage of rolling, the large floating range of the forging ring 7 also prevents the limit boss 21 from being stuck due to excessive friction with the forging ring; as the rolling process proceeds, the elastic member adjusting mechanism can increase the pressure on the elastic member 3, so that the limit boss 21 gives the forging ring 7 a larger pressure, and the displacement of the limit boss 21 in the axial direction of the mandrel 1 gradually decreases, to adapt to the rolling process in which the size precision of the forging ring gradually meets the standard, until the processing of the forging ring completely meets the size precision; it should be noted that, as shown in Figure 8 the final part that ensures the size precision of the forging ring is the two tapered pinch rollers 9, so the limit boss 21 is allowed to have a floating range in the axial direction of the mandrel; by using this technical means, the pressure of the limit boss 21 on the forging ring 7 can be adjusted in real time according to the actual situation of the profiled ring production from the initial stage to the later stage of the forging ring, which improves the fault tolerance rate in the rolling process and facilitates the formation of high-quality profiled ring products with higher efficiency.

[0046] The elastic floating mechanism further comprises an energy component 63, a controller 64 and a displacement sensor, the energy component is used to provide power energy for the spring member adjusting mechanism, and the displacement sensor is used to monitor the real-time distance between the upper end surface of the limit boss 21 and the lower end surface of the bearing assembly 4 and transmit the signal to the controller 64, so that the operator can master the tightness of the elastic member and the cooperation between the forging ring and the limit boss 21 in real time during the ring forming process, so as to take targeted measures; of course, it is also feasible to replace the displacement sensor as described above with a pressure sensor or a combination of displacement sensor and pressure sensor to monitor the tightness of the elastic member and the cooperation between the forging ring and the limit boss 21 in real time, which is not limited here; further, the operator can also not need to read data before operation, but can preset the program through programming means, so that after the sensor converts the cooperation between the forging ring 7 and the limit boss 21 into an electrical signal and transmits it to the controller 64, the controller 64 controls the elastic member adjusting mechanism to react according to the preset program, to avoid the influence of human factors on the quality of the finished product.

[0047] As Figure 6As shown, the elastic member adjusting mechanism comprises a driving member 62, a transmission assembly, a positioning nut member 5 and a bearing assembly 4, the output end of the driving member 62 is connected with the input end of the transmission assembly, the driving member 62 comprises but is not limited to a motor, the output end of the transmission assembly is connected with the positioning nut member 5 to drive the positioning nut member 5 to rotate, the mandrel 1 comprises a threaded segment 13 for threaded connection with the positioning nut member 5, the positioning nut member 5 is connected with the upper end surface of the bearing assembly 4, and the lower end surface of the bearing assembly 4 is connected with the upper end of the elastic member 3; in operation, the driving member 62 drives the transmission assembly, the transmission assembly transmits power to the positioning nut member 5 to drive it to rotate and lift along the threaded segment 13, and the positioning nut member 5 controls the elastic member 3 to perform extension and contraction through the bearing assembly 4.

[0048] Further, as shown in Figure 6 , the transmission assembly can comprise a worm 65, a worm wheel 66 and a gear shaft 67, the output end of the driving member 62 is connected with the input end of the worm 65, the worm 65 cooperates with the worm wheel 66, the output end of the worm wheel 66 is connected with the gear shaft 67, the outer side of the positioning nut member 5 is fixedly connected with a gear ring 51 as described above, or the outer side of the positioning nut member 5 is formed with teeth, and the gear on the gear shaft 67 cooperates with the gear ring 51, the worm and worm wheel assembly is arranged in the transmission assembly, and the self-locking performance thereof can ensure that the transmission assembly stably and reliably transmits power.

[0049] Still further, as shown in Figure 3 , 4 , the bearing assembly 4 comprises a lower washer 41, a retainer 42, a rolling element 43 and an upper washer 44; the upper washer 44 is used for being connected with the positioning nut member 5, the lower end of the lower washer 41 is provided with a first elastic member positioning portion 411, the first elastic member positioning portion 411 can be a clamping groove formed on the lower washer 41 or a boss formed with a recess; the upper end of the core roller outer mold 2 is also provided with a second elastic member positioning portion 22, the second elastic member positioning portion 22 can be similar in structure to the first elastic member positioning portion 22, the movement of the elastic member 3 in the radial direction of the mandrel 1 is limited through the cooperation of the first elastic member positioning portion 411 and the second elastic member positioning portion 22; and the forged ring 7 continuously and stably applies pressure to ensure the limiting boss 21.

[0050] As shown in Figure 6As shown, the elastic member adjusting mechanism further comprises a sliding frame 61, which is slidingly sleeved outside the mandrel 1, and the driving member 62 and the transmission assembly are both mounted on the sliding frame 61; one of the working modes of the elastic member adjusting mechanism is as follows: when the driving member 62 drives the positioning nut member 5 to rotate downward through the transmission assembly, the bearing assembly 4 presses the elastic member 3 to move downward along the mandrel 1, at this time, since the sliding frame 61 is in sliding connection with the mandrel 1, the sliding frame 61 drives the driving member 62 and the transmission assembly to move downward under the action of gravity, and through the above-mentioned stretching and contracting adjustment of the elastic member 3, the device does not need to consider the influence of the axial displacement length limit relative to the cylinder driving and other driving modes; preferably, the sliding frame 61 and the mandrel 1 are matched in the way of sliding groove sliding key.

[0051] It can be understood that another embodiment of the elastic member adjusting mechanism can be that the driving member and the transmission assembly are basically unchanged, the sliding frame 61 is replaced by a fixed frame, at the same time, the gear on the gear shaft 67 and the gear ring 51 are matched in the way of straight-toothed matching, and the thickness of the gear and / or the gear ring is increased, so that the positioning nut member 5 can still keep the gear ring 51 matched with the gear even if it is driven to move downward, and of course, this way will limit the downward stroke of the positioning nut member 5.

[0052] At the same time, the elastic member adjusting mechanism can also be a cylinder driving assembly, which is used to drive the elastic member to axially stretch and / or displace along the mandrel, of course, the cylinder assembly also has the disadvantage of limited displacement stroke, and if the cylinder and the mandrel are fixedly connected, it is not convenient to disassemble and assemble.

[0053] As shown in the drawings, Figure 2 The mandrel 1 sequentially comprises a first optical shaft segment, a positioning portion 11, a first sliding shaft segment 12, a threaded segment 13, a second sliding shaft segment 14 and a second optical shaft segment from the first end to the second end (i.e. from bottom to top), and the outer diameters of the first sliding shaft segment 12, the threaded segment 13, the second sliding shaft segment 14 and the second optical shaft segment sequentially decrease, the first sliding shaft segment 12 is used for slidingly mounting the core roller outer mold 2, and the second sliding shaft segment 14 is used for slidingly mounting the sliding frame; the optimized design of the structure of the mandrel makes the core roller assembly as a whole have as small volume and as light weight as possible and have compact structure, which is suitable for the scene that the core roller assembly needs to be rapidly rotated. The positioning portion 11 can be processed into the shape of a shaft shoulder. Further, the positioning nut member 5 is a disc-shaped member, so as to achieve the effects of weight reduction and volume reduction.

[0054] Further, as shown in the drawings, Figure 6 , 7As shown, the sliding frame 61 is a cylinder / disk composite, with a lower end annular support boss 611 in contact with the upper surface of the positioning nut member 5, a middle part drive member installation platform 612, and an upper end sliding platform 613; the sliding platform is cylindrical, with a keyway on the inner side and is coupled to the mandrel 1 through a sliding key. The above design is to make the structure of the core roller assembly more compact, to improve its stability.

[0055] Further, the energy component can be a battery, and the drive members 62 are symmetrically arranged with the energy component on the sliding frame to improve the stability of the core roller assembly.

[0056] Further, to reduce the friction torque of driving the positioning nut member 5, the rolling body installation position in the bearing assembly 4 is close to the inner side of the mandrel 1.

[0057] Further, to reduce the friction torque of driving the positioning nut member 5, the spring member adjustment mechanism is arranged close to the inner side of the mandrel 1 with the annular support boss of the positioning nut member 5.

[0058] Further, to improve the positioning stability of the elastic member, the first elastic member positioning part 411 and the second elastic member positioning part 22 are both annular bosses.

[0059] Further, the controller, energy component, drive member, etc. are connected in the way of bolt connection, which is convenient for disassembly and assembly.

[0060] Further, according to another aspect of the present application, it also includes a ring rolling machine, which includes the above-mentioned core roller assembly; further, as shown, it also includes a tapered pinch roll assembly 9 for jointly clamping the forged ring up and down, and a drive roll assembly 8 for driving the forged ring 7 to rotate. Figure 8

[0061] The above-mentioned embodiments of the present application do not constitute a limitation on the protection scope of the present application. Any modification, equivalent replacement, and improvement within the spirit and principles of the present application shall be included in the protection scope of the claims of the present application.​

Claims

1. A core roll assembly for the rolling of profiled ring members, characterised in that: The core roller assembly comprises a mandrel and a core roller outer mold sleeved outside the mandrel, the mandrel has upper and lower ends, the side of the mandrel close to the lower end has a positioning part, the first end of the core roller outer mold abuts against the positioning part, the second end of the core roller outer mold has a limiting boss, and the side of the limiting boss away from the positioning part is connected with an elastic floating mechanism; the elastic floating mechanism comprises an elastic member, the elastic member is positioned between the limiting boss and the upper end of the mandrel through support to give the limiting boss pressure; the elastic floating mechanism further comprises an elastic member adjusting mechanism, the elastic member adjusting mechanism is arranged outside the mandrel to control the axial expansion and / or displacement of the elastic member along the mandrel.

2. A core roll assembly for rolling of profiled ring members according to claim 1, characterized in that: The elastic member adjusting mechanism comprises a driving member, a transmission assembly, a positioning nut member and a bearing assembly, the output end of the driving member is connected with the input end of the transmission assembly, the output end of the transmission assembly is connected with the positioning nut member to drive the rotation of the positioning nut member, the mandrel comprises a threaded segment for threaded connection with the positioning nut member, the positioning nut member is connected with the bearing assembly, and the other end of the bearing assembly is connected with the elastic member.

3. A core roll assembly for rolling of profiled ring members according to claim 2, characterized in that: The transmission assembly comprises a worm gear assembly and a gear shaft, the output end of the driving member is connected with the input end of the worm gear assembly, the output end of the worm gear assembly is connected with the gear shaft, and the outer side of the positioning nut member is fixedly connected with a gear ring, and the gear of the gear shaft is matched with the gear ring.

4. A core roll assembly for rolling of profiled ring members as claimed in claim 2, wherein: The elastic member adjusting mechanism further comprises a sliding frame, the sliding frame is sleeved outside the mandrel, and the driving member and the transmission assembly are arranged on the sliding frame.

5. A core roll assembly for rolling of profiled ring members according to claim 4, characterized in that: The mandrel comprises a first optical shaft segment, a positioning part, a first sliding shaft segment, a threaded segment, a second sliding shaft segment and a second optical shaft segment from the first end to the second end, the first sliding shaft segment is used for slidingly installing the core roller outer mold, and the second sliding shaft segment is used for slidingly installing the sliding frame.

6. A core roll assembly for the rolling of profiled rings as claimed in claim 1, wherein: The elastic member adjusting mechanism is a cylinder driving assembly, and the cylinder driving assembly is used for driving the elastic member to axially expand and / or displace along the mandrel.

7. A core roll assembly for rolling of profiled ring members as claimed in claim 2, wherein: The elastic floating mechanism further comprises an energy source assembly, a controller and a displacement sensor, the energy source assembly is used for providing energy, and the displacement sensor is used for monitoring the real-time distance between the upper end face of the limiting boss and the lower end face of the bearing assembly and transmitting the signal to the controller.

8. A ring rolling mill characterised in that: The core roller assembly comprises a mandrel and a core roller outer mold sleeved outside the mandrel, the mandrel has upper and lower ends, the side of the mandrel close to the lower end has a positioning part, the first end of the core roller outer mold abuts against the positioning part, the second end of the core roller outer mold has a limiting boss, and the side of the limiting boss away from the positioning part is connected with an elastic floating mechanism; the elastic floating mechanism comprises an elastic member, the elastic member is positioned between the limiting boss and the upper end of the mandrel through support to give the limiting boss pressure; the elastic floating mechanism further comprises an elastic member adjusting mechanism, the elastic member adjusting mechanism is arranged outside the mandrel to control the axial expansion and / or displacement of the elastic member along the mandrel.

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