Main roller assembly and ring rolling machine

Abstract

A main roller assembly and a ring rolling machine belong to the technical field of ring part processing, the main roller assembly comprises a main roller rotatably arranged on a vertical plate, the sides, close to the vertical plate, of roller necks at the two ends of the main roller are respectively in contact with a group of supporting wheel pairs, each supporting wheel pair comprises a mounting seat fixedly arranged on the vertical plate, and two rollers arranged side by side are rotatably arranged on the mounting seat; the axes of the idler wheels are parallel to the main roller, roller necks at the two ends of the main roller are located between the two corresponding idler wheels, the two oppositely-arranged idler wheels support the main roller, it is guaranteed that the main roller can smoothly rotate around a shaft, meanwhile, the radial bearing capacity of the main roller is improved, and the service life of the main roller is prolonged. As the roller is in contact with one side of the main roller, the roller can effectively avoid the core roller, the diameter of the main roller can be reduced, the diameter of the main roller is matched with the diameter of the core roller, the contact arc lengths of the main roller and the core roller with the inner and outer walls of the annular piece are the same, local force application of the inner and outer walls of the annular piece is the same, and stress distribution of the inner and outer walls of the annular piece is uniform.

Description

Technical Field

[0001] The invention relates to the technical field of ring-shaped parts processing, in particular to a main roller assembly and a ring rolling machine. Background Art

[0002] Ring rolling machine, also known as hole expander or ring rolling machine, is a kind of equipment used to produce annular mechanical parts of various shapes and sizes and various seamless annular forgings. It is widely used in the manufacture of bearing rings, gear rings, flanges, hubs, thin-walled cylindrical parts, wind power flanges, high-neck flanges and other seamless annular forgings.

[0003] The ring rolling machine contains a main roller and a core roller. The main roller is parallel to the core roller. The ring is placed between the main roller and the core roller. The two ends of the main roller are rotatably arranged on the bed through bearings. The main roller is driven by a motor and can rotate around the axis under the drive of the motor. The core roller is a passive roller. During the rolling process, the core roller rotates drivenly under the friction force of the ring.

[0004] In the existing method of setting bearings at both ends of the main roller, the bearing specifications are relatively large. In order to avoid the influence of the bearings on the rolling work of the ring part, the radius of the main roller will be increased, resulting in different radii of the main roller and the core roller, so that the contact arc lengths of the main roller, the core roller and the ring part are different. The core roller with a smaller diameter will exert a greater force locally, resulting in stress concentration, which directly affects the stress distribution of the inner and outer walls of the ring part; in addition, the main roller is installed at both ends with bearings, and the radial force during the rolling process of the main roller is completely borne by the bearings. As the rolling rate increases, problems such as short bearing life, severe roll neck wear, large axial movement, and low finished product precision will arise. Summary of the invention

[0005] In order to solve the technical problems in the above background technology that the two ends of the main roller of the existing ring rolling machine are installed by spherical roller bearings, the adaptability is poor and the quality of the finished ring parts is poor, the present invention provides a main roller assembly and a ring rolling machine.

[0006] The technical solution of the present invention is as follows:

[0007] The present invention provides a main roller assembly, comprising a main roller, which is rotatably arranged on a vertical plate, and roller necks at both ends of the main roller are respectively in contact with a group of supporting wheel pairs close to the vertical plate. The supporting wheel pairs include a mounting seat fixedly arranged on the vertical plate, and two rollers arranged side by side are rotatably arranged on the mounting seat, and the axes of the rollers are parallel to the axes of the main rollers. The roller necks at both ends of the main roller are located between the two rollers of the corresponding supporting wheel pairs, and both ends of the main roller are in contact with the two rollers. The main roller is supported by the two oppositely arranged rollers, which not only ensures that the main roller can rotate smoothly around the axis, but also improves its radial bearing capacity and service life; in addition, since the rollers are in contact with one side of the main roller, the rollers can effectively avoid the core roller, thereby reducing the diameter of the main roller, so that the diameter of the main roller matches the diameter of the core roller, so as to ensure that the main roller and the core roller have the same contact arc length with the inner and outer walls of the annular component, thereby ensuring that the local forces applied to the inner and outer walls of the annular component are the same, so that the stress distribution of the inner and outer walls of the annular component is uniform, and the finished product quality of the annular component is improved.

[0008] Preferably, the main roller is arranged vertically, the upper roller neck of the main roller contacts the first supporting wheel pair, and the lower roller neck of the main roller contacts the second supporting wheel pair, so that the main roller can rotate smoothly around the axis to ensure the overall radial bearing capacity of the main roller.

[0009] Preferably, the first supporting wheel pair includes a first mounting seat, on which two rollers are rotatably provided, and on which a pressure plate is fixedly provided. The two rollers are symmetrically distributed on both sides of the pressure plate, and a mounting hole is provided on the lower surface of the pressure plate. The upper end of the main roller is rotatably provided in the mounting hole of the pressure plate so as to limit the axial movement of the main roller by the pressure plate.

[0010] Preferably, the upper end of the main roller is in contact with the mounting hole via a steel sleeve, thereby reducing wear between the upper end of the main roller and the pressure plate and increasing the service life of the main roller.

[0011] Preferably, the second supporting wheel pair includes a second mounting seat, on which two rollers are rotatably provided, an avoidance groove is opened in the middle area of ​​the second mounting seat, a base is fixedly provided on the vertical plate, the lower end of the main roller passes through the avoidance groove and is rotatably provided in the base, and the base cooperates with the use of a pressure plate to effectively limit the axial movement of the main roller, ensure the fixation of the position of the main roller, and effectively improve the quality of the rolled product.

[0012] Preferably, the lower end of the main roller is rotatably connected to the base via a thrust self-aligning bearing, which increases radial load and axial load, ensures high-speed operation capability, and provides an upward thrust for the main roller.

[0013] Preferably, the main roller has a necked structure, so that when the lower end of the main roller is connected to the thrust self-aligning bearing, the influence of the thrust self-aligning bearing on the diameter of the middle working part of the main roller can be reduced, thereby facilitating the reduction adjustment of the diameter of the middle working part of the main roller.

[0014] Preferably, shaft sleeves are fixedly provided at the roller neck positions at both ends of the main roller for contacting the roller. The shaft sleeves can assist the main roller in contacting the roller to increase the distance between the main roller and the roller and reduce the distance between the main roller and the core roller, thereby facilitating the reduction adjustment of the main roller diameter and facilitating the matching of the main roller diameter with the core roller diameter. In addition, the wear of the main roller neck can be reduced and the service life of the main roller can be increased.

[0015] The present invention provides a ring rolling machine, comprising a core roller with the same diameter as that of a main roller, the core roller is located at a side of the main roller away from a roller, the axis of the core roller is parallel to the axis of the main roller, the main roller and the core roller have the same contact arc length with the inner and outer walls of a ring part, thereby ensuring that the local forces applied to the inner and outer walls of the ring part are the same, making the stress distribution of the inner and outer walls of the ring part uniform, and improving the quality of the finished product of the ring part.

[0016] It can be seen from the above technical solutions that the advantages of the present invention are:

[0017] 1. Both ends of the main roller are in contact with two rollers. The main roller is supported by two rollers arranged opposite to each other. While ensuring that the main roller can rotate smoothly around the axis, its radial load-bearing capacity and service life are improved. Since the roller contacts one side of the main roller, the roller can effectively avoid the core roller, thereby reducing the diameter of the main roller, so that the diameter of the main roller matches the diameter of the core roller, so as to ensure that the contact arc lengths of the main roller and the core roller with the inner and outer walls of the ring are the same, thereby ensuring that the local forces on the inner and outer walls of the ring are the same, so that the stress distribution on the inner and outer walls of the ring is uniform, and the quality of the finished products of the ring is improved.

[0018] 2. Bushings are fixedly arranged at the roller neck positions at both ends of the main roller for contacting the roller. The bushings can assist the main roller in contacting the roller, so as to increase the distance between the main roller and the roller and reduce the distance between the main roller and the core roller, thereby facilitating the reduction and adjustment of the main roller diameter and matching the main roller diameter with the core roller diameter. In addition, the wear of the main roller neck can be reduced and the service life of the main roller can be increased. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solution of the present invention, the accompanying drawings required for use in the description will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0020] Figure 1 It is a schematic diagram of the overall structure of the main roller assembly according to one or more embodiments of the present invention;

[0021] Figure 2 A schematic structural diagram of a first supporting wheel pair according to one or more embodiments of the present invention;

[0022] Figure 3 A schematic structural diagram of a second supporting wheel pair according to one or more embodiments of the present invention;

[0023] Figure 4 It is a schematic structural diagram of a base according to one or more embodiments of the present invention;

[0024] Figure 5 It is a schematic structural diagram of a main roller assembly equipped with a mold according to one or more embodiments of the present invention;

[0025] The components represented by the reference numerals in the figure are:

[0026] 1. Main roller; 2. Bushing; 3. Roller; 4. Vertical plate; 5. First mounting seat; 6. Second mounting seat; 7. Base; 8. Pressing plate; 9. Support table; 10. Mold. DETAILED DESCRIPTION

[0027] In order to make the purpose, features and advantages of the present invention more obvious and easy to understand, the technical scheme of the present invention will be clearly and completely described below in conjunction with the drawings in this specific embodiment. Obviously, the embodiments described below are only part of the embodiments of the present invention, not all of them. Based on the embodiments in this patent, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this patent.

[0028] Example 1

[0029] In a typical embodiment of the present invention, Figure 1-Figure 4 As shown, a main roller assembly is proposed, including: a main roller 1, a vertical plate 4 and two sets of supporting wheel pairs. The main roller 1 is vertically arranged, and the main roller 1 is rotatably arranged on the vertical plate 4. The main roller 1 is a necked structure, and the upper and lower ends of the main roller 1 are respectively rotatably connected to a set of supporting wheel pairs.

[0030] Among them, the support wheel pair is divided into a first support wheel pair and a second support wheel pair. The first support wheel pair is used to contact the side of the upper end roll neck of the main roll 1 away from the core roll (it can also be understood as the side of the upper end roll neck of the main roll 1 close to the vertical plate 4), and the second support wheel pair is used to contact the side of the lower end roll neck of the main roll 1 away from the core roll.

[0031] like Figure 2 As shown, the first supporting wheel pair includes a first mounting seat 5 and two rollers 3. The first mounting seat 5 is fixedly mounted on the vertical plate 4 by welding, bolt connection, etc. The two rollers 3 are rotatably arranged side by side on the first mounting seat 5. The axes of the two rollers 3 are parallel to each other and to the axis of the main roller 1. There is a set distance between the two rollers 3, and the wheel axle of the roller 3 is rotatably connected to the first mounting seat 5 through a roller bearing.

[0032] A pressure plate 8 is also welded and fixed on the first mounting seat 5. The pressure plate 8 is fixedly set on the upper part of the first mounting seat 5, and the pressure plate 8 is located between the two rollers 3. Specifically, the two rollers 3 are symmetrically distributed on both sides of the pressure plate 8. A mounting hole is opened on the lower surface of the pressure plate 8. The upper end of the main roller 1 is rotatably set in the mounting hole of the pressure plate 8, and the upper end of the main roller 1 is in contact with the mounting hole through a steel sleeve to reduce the wear of the main roller 1 and increase the service life of the main roller 1. The setting of the pressure plate 8 facilitates the adjustment of the distance between the main roller 1 and the core roller.

[0033] like Figure 3 As shown, the second supporting wheel pair includes a second mounting seat 6 and two rollers 3. The second mounting seat 6 is fixedly mounted on the vertical plate 4 by welding, bolting, etc. The two rollers 3 are rotatably arranged side by side on the second mounting seat 6. The axes of the two rollers 3 are parallel to each other and to the axis of the main roller 1. There is a set distance between the two rollers 3, and the wheel axle of the roller 3 is rotatably connected to the second mounting seat 6 through a roller bearing.

[0034] The middle area of ​​the second mounting seat 6 is provided with an avoidance groove to allow the lower end of the main roller 1 to pass through. A base 7 is also fixed on the vertical plate 4. Figure 4 As shown, the base 7 contains a support platform 9 for placing the thrust self-aligning bearing. The lower end of the main roller 1 passes through the second mounting seat 6 and is rotatably set in the base 7. The lower end of the main roller 1 is rotatably connected to the base 7 through the thrust self-aligning bearing. The lower end of the main roller 1 contains a step structure abutting against the thrust self-aligning bearing. The thrust self-aligning bearing provides an upward thrust for the main roller 1 while ensuring the high-speed operation capability of the main roller 1.

[0035] It is understandable that, since the radial force exerted on the main roller 1 is mainly transmitted to the supporting wheel pair, the load-bearing capacity requirement for the thrust spherical bearing at the lower end of the main roller 1 is relatively low, which effectively reduces the size of the thrust spherical bearing and facilitates the adjustment of the diameter of the main roller 1.

[0036] The setting of the necking structure enables the lower end of the main roller 1 to reduce the influence of the thrust self-aligning bearing on the diameter of the middle working part of the main roller 1 when it is connected to the thrust self-aligning bearing, thereby facilitating the reduction adjustment of the diameter of the middle working part of the main roller 1.

[0037] The side of the upper end of the main roller 1 away from the core roller contacts the two rollers 3 of the first supporting wheel pair, and the side of the lower end of the main roller 1 away from the core roller contacts the two rollers 3 of the second supporting wheel pair. The roll neck of the main roller 1 is installed by a steel sleeve, which reduces the wear of the roll neck of the main roller 1 and increases the service life of the main roller 1. The main roller 1 is supported by two oppositely arranged rollers 3, which not only ensures that the main roller 1 can rotate smoothly around the axis, but also improves its radial bearing capacity. In combination with the use of the pressure plate 8 and the base 7, the axial movement of the main roller 1 is effectively limited, ensuring the fixed position of the main roller 1 and effectively improving the quality of the rolled product.

[0038] In addition, since roller 3 is in contact with the side of the main roller 1 away from the core roller, roller 3 can effectively and automatically avoid the core roller, thereby reducing the diameter of the main roller 1 (specifically the diameter of the working part of the main roller 1), so that the diameter of the main roller 1 matches the diameter of the core roller, to ensure that the contact arc lengths of the main roller 1 and the core roller with the inner and outer walls of the annular component are the same, thereby ensuring that the local forces applied to the inner and outer walls of the annular component are the same, so that the stress distribution of the inner and outer walls of the annular component is uniform, thereby improving the quality of the finished product of the annular component.

[0039] In order to further reduce the diameter of the main roller 1, shaft sleeves 2 are fixedly arranged at the roller neck positions for contacting the roller 3 at both ends of the main roller 1. The shaft sleeve 2 and the main roller 1 are connected by a key to limit the relative rotation between the shaft sleeve 2 and the main roller 1. A pressure cover is respectively arranged at the upper and lower ends of the shaft sleeve 2. The two pressure covers are connected by bolts, and a mounting groove for installing a pressure plate is provided on the side wall of the main roller 1 to achieve a detachable connection between the shaft sleeve 2 and the main roller 1. On the one hand, the shaft sleeve 2 can assist the main roller 1 to contact the roller 3 to increase the distance between the main roller 1 and the roller 3 and reduce the distance between the main roller 1 and the core roller, thereby facilitating the reduction adjustment of the diameter of the main roller 1 and facilitating the matching of the diameter of the main roller 1 with the diameter of the core roller. On the other hand, the wear of the roller neck of the main roller 1 can be reduced and the service life of the main roller 1 can be increased.

[0040] In other embodiments, Figure 5 As shown, a mold 10 can also be detachably installed on the outside of the main roller 1 to achieve ring rolling in the traditional way of adding a main roller mold, that is, for rolling special-shaped rings.

[0041] Example 2

[0042] In another typical embodiment of the present invention, a ring rolling machine is proposed, which adopts the main roller assembly mentioned in Example 1. The main roller assembly is installed on the bed and also includes a core roller. The core roller is located on the side of the main roller 1 away from the roller 3. The core roller is vertically arranged, and the axis of the core roller is parallel to the axis of the main roller 1. The diameter of the core roller is the same as the diameter of the main roller 1. The main roller 1 cooperates with the core roller to achieve the rolling of the ring-shaped member.

[0043] It should be noted that the portion of the core roller mentioned in this embodiment having the same diameter as the main roller 1 is mainly a working portion for rolling the ring-shaped parts, and the diameter of other non-rolling working portions is not excessively restricted here.

[0044] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A main roller assembly, comprising: The main roller (1) is characterized in that the main roller (1) is rotatably arranged on the vertical plate (4), and the roller necks at both ends of the main roller (1) are respectively in contact with a group of supporting wheel pairs on the side close to the vertical plate (4), and the supporting wheel pairs include a mounting seat fixedly arranged on the vertical plate (4), and two rollers (3) arranged side by side are rotatably arranged on the mounting seat, and the axes of the rollers (3) are parallel to the axes of the main roller (1), and the roller necks at both ends of the main roller (1) are located between the two rollers (3) of the corresponding supporting wheel pairs.

2. The main roller assembly according to claim 1, characterized in that: The main roller (1) is arranged vertically, the upper roller neck of the main roller (1) contacts the first supporting wheel pair, and the lower roller neck of the main roller (1) contacts the second supporting wheel pair.

3. The main roller assembly according to claim 2, characterized in that: The first supporting wheel pair comprises a first mounting seat (5), two rollers (3) are rotatably provided on the first mounting seat (5), a pressure plate (8) is fixedly provided on the first mounting seat (5), the two rollers (3) are symmetrically distributed on both sides of the pressure plate (8), a mounting hole is provided on the lower surface of the pressure plate (8), and the upper end of the main roller (1) is rotatably provided in the mounting hole of the pressure plate (8).

4. The main roller assembly according to claim 3, characterized in that: The upper end of the main roller (1) is in contact with the mounting hole via a steel sleeve.

5. The main roller assembly according to claim 2, characterized in that: The second supporting wheel pair comprises a second mounting seat (6), two rollers (3) are rotatably arranged on the second mounting seat (6), an escape groove is provided in the middle area of ​​the second mounting seat (6), a base (7) is fixedly arranged on the vertical plate (4), and the lower end of the main roller (1) passes through the escape groove and is rotatably arranged in the base (7).

6. The main roller assembly according to claim 5, characterized in that: The lower end of the main roller (1) is rotatably connected to the base (7) via a thrust self-aligning bearing.

7. The main roller assembly according to claim 6, characterized in that: The main roller (1) is a necked structure.

8. The main roller assembly according to claim 1, characterized in that Axle sleeves (2) are fixedly provided at roller neck positions at both ends of the main roller (1) for contacting the roller (3).

9. A ring rolling machine, characterized in that: A main roller assembly as described in any one of claims 1 to 8 is used, comprising a core roller having the same diameter as the main roller (1), the core roller being located on the side of the main roller (1) away from the roller (3), and the axis of the core roller being parallel to the axis of the main roller (1).

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