Rolling mill
By setting movable bearing seats and stop nuts on the pull rod of the rolling mill and using zigzag threads, the problems of large size and high cost caused by load-bearing rolling forces by existing rolling mills are solved, and higher mill stiffness and lower costs are achieved.
Patent Information
- Application Number
- CN202421618814.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-09
- Publication Date
- 2025-04-18
- Estimated Expiration
- 2034-07-09
AI Technical Summary
In order to bear large rolling forces, existing rolling mills have problems of larger structural size and higher cost.
By movably providing the first bearing seat and the second bearing seat on the tie rod, the first roll and the second roll can press the steel, and a pair of stop nuts and zigzag threads are provided on the tie rod to improve load bearing capacity and mill stiffness.
Under the same thread diameter, the thread deformation is smaller, the rolling mill is stiffer, the rolling mill is smaller in size and lower in cost, which improves the rolling accuracy.
Smart Images
Figure CN222766964U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of steel rolling equipment, and in particular relates to a rolling mill. Background Art
[0002] As the main equipment on the hot rolling production line of steel, the rolling mill is used to roll and shape the blank. Among them, the roller ring is an important working part on the rolling mill, which uses the pressure generated by a pair or a group of roller rings when rolling to roll the steel. When the rollers on the rolling mill are in the process of rolling and shaping the rolled parts by rotating rollers, the structures such as the tie rods and nuts with trapezoidal threads in the rolling mill are usually used to bear the large rolling force. If the rolling force is too large, it will cause the main force-bearing parts such as the tie rods and nuts to deform, resulting in rolling bounce and affecting the rolling accuracy. Therefore, in order to withstand the large rolling force, it is usually necessary to match the tie rods and nut structures with larger sizes. However, this undoubtedly causes problems such as the larger size, heavier weight and higher cost of the rolling mill. Utility Model Content
[0003] In view of this, the purpose of the utility model is to provide a rolling mill to solve the technical problems of the existing rolling mills having large structural dimensions and high costs due to the need to bear large rolling forces.
[0004] In order to achieve the above object, the utility model provides the following technical solution: a rolling mill, comprising:
[0005] Support;
[0006] A pull rod rotatably mounted in the support;
[0007] A first bearing seat is movably arranged on the pull rod, and a first roller is rotatably mounted inside the first bearing seat;
[0008] A second bearing seat is movably mounted on the pull rod and spaced apart from the first bearing seat, wherein a second roller is rotatably mounted inside the second bearing seat and cooperates with the first roller to press the steel;
[0009] A pair of stop nuts are fixedly installed in the support at intervals and sleeved on the pull rod, and are used to cooperate with the pull rod to bear the rolling force generated during the rolling process of the first roller and the second roller;
[0010] The pull rod is provided with threads which cooperate with the stop nuts, and the threads are arranged in a sawtooth shape.
[0011] Furthermore, a buffer pad is provided between the first bearing seat and the stop nut.
[0012] Furthermore, the buffer pad is spherical.
[0013] Furthermore, a spherical portion adapted to the buffer pad is provided at one end of the stop nut close to the buffer pad.
[0014] Furthermore, the inclination angle of one side surface of the thread teeth of the thread is defined as A, and the inclination angle of the other side surface of the thread teeth of the thread is defined as B, and the inclination angle B is greater than the inclination angle A.
[0015] Furthermore, the inclination angle A is 3-17°.
[0016] Furthermore, it also includes a fastening assembly for fixing each of the stop nuts, the fastening assembly includes an end cover sleeved on the pull rod, and a stop pin for fixing the stop nut, one end of the stop pin is arranged on the end cover, and the other end of the stop pin is arranged on the stop nut.
[0017] Furthermore, the pull rod is also sleeved with an abutting nut for abutting the stop nut, the abutting nut is located between the end cover and the stop nut, and the abutting nut is provided with a fixing through hole for the stop pin to pass through.
[0018] Furthermore, a pin is provided in the end cover, and an elastic member for elastically pushing up the abutment nut is sleeved on the pin.
[0019] Furthermore, the elastic member is a disc spring.
[0020] The beneficial effects of the utility model are as follows: compared with the prior art, in the utility model, the first bearing seat and the second bearing seat are movably arranged on the pull rod, so that the first roller and the second roller can press the steel by moving the first bearing seat and the second bearing seat respectively; by arranging a pair of stop nuts and setting the thread on the pull rod to a sawtooth shape, since the sawtooth thread is only subjected to force on the load side and is not bidirectionally loaded, the stop nut can be matched with the pull rod to make the load-bearing capacity much greater than the trapezoidal thread mainly used for spiral transmission and bidirectional loading, so that under the condition of the same thread diameter, the thread deformation is smaller, the rolling mill rigidity is higher, the rolling mill size is smaller, and the cost is lower.
[0021] Other advantages, objectives and features of the utility model will be described in the following description and will be apparent to those skilled in the art to some extent, or those skilled in the art can be taught from the practice of the utility model. The objectives and other advantages of the utility model can be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] In order to make the purpose, technical solution and beneficial effects of the utility model clearer, the utility model provides the following drawings for explanation:
[0023] Figure 1A cross-sectional view of a rolling mill proposed in one embodiment of the utility model;
[0024] Figure 2 This is an enlarged view of A proposed in one embodiment of the utility model.
[0025] Figure Number:
[0026] 1- support;
[0027] 2-Tie rod;
[0028] 3-first bearing seat; 31-first roller
[0029] 4-second bearing seat; 41-second rolling roller;
[0030] 5- Stop nut;
[0031] 6- cushion;
[0032] 7-fastening assembly; 71-end cover; 72-stop pin; 73-abutment nut;
[0033] 8-pin;
[0034] 9-Elastic member. DETAILED DESCRIPTION
[0035] like Figure 1 to Figure 2 As shown, this embodiment proposes a rolling mill, including a support 1, a tie rod 2, a first bearing seat 3, and a second bearing seat 4, the tie rod 2 is rotatably installed in the support 1, and the first bearing seat 3 and the second bearing seat 4 are movably arranged on the tie rod 2, the first bearing seat 3 and the second bearing seat 4 are arranged at an interval, a first roller 31 is rotatably installed inside the first bearing seat 3, and a second roller 41 is rotatably installed inside the second bearing seat 4, the first roller 31 and the second roller 41 cooperate to press steel, in addition, a pair of stop nuts 5 are also provided in the support 1, the pair of stop nuts 5 are sleeved on the tie rod 2, the pair of stop nuts 5 can be respectively connected with the tie rod 2 to bear the rolling force generated during the rolling process of the first roller 31 and the second roller 41, the tie rod 2 is provided with a thread, the thread is serrated, and the tie rod 2 is threadedly connected to the stop nut 5. In the present application, a first bearing seat 3 and a second bearing seat 4 are movably provided on the pull rod 2, so that the first roller 31 and the second roller 41 can be pressed by moving the first bearing seat 3 and the second bearing seat 4 respectively; a pair of stop nuts 5 are provided, and the thread on the pull rod 2 is set to a serrated shape. Since the serrated thread is only subjected to force on the load side and is not subjected to bidirectional loads, the stop nut 5 can be matched with the pull rod 2, so that the load-bearing capacity is much greater than that of the trapezoidal thread mainly used for spiral transmission and bidirectional loads. Therefore, under the condition of the same thread diameter, the thread deformation is smaller, the rolling mill rigidity is higher, the rolling mill size is smaller, and the cost is lower.
[0036] Preferably, the tie rod 2 is provided with threads respectively connected with the first bearing seat 3 and the second bearing seat 4, and the threads connected with the first bearing seat 3 are defined as forward rotation, and the threads connected with the second bearing seat 4 are defined as reverse rotation. In this way, when the tie rod 2 rotates, the tie rod 2 can drive the first bearing seat 3 and the second bearing seat 4 to move relative to each other, so that the first roller 31 and the second roller 41 move relative to each other, thereby realizing the rolling of the steel.
[0037] In the present application, since the stop nut 5 is fixed in the support 1, the pull rod 2 is rotatably installed in the support 1. In this way, the pull rod 2 rotates relative to the stop nut 5. The pull rod 2 is threadedly connected to the stop nut 5, so that the rolling force generated by the first roller 31 and the second roller 41 during the rolling process can be better borne.
[0038] For further information, see Figure 1 As shown, a buffer pad 6 is provided between the first bearing seat 3 and the stop nut 5. By providing the buffer pad 6, when rolling steel, the rolling force is transmitted to the buffer pad 6 through the first bearing seat 3, and the buffer pad 6 is then transmitted to the stop nut 5. Since the thread of the stop nut 5 is arranged in a sawtooth shape, the rolling force transmission direction of the sawtooth thread remains unchanged, and the thread is not bidirectionally loaded, so that the load-bearing capacity is much greater than that of the trapezoidal thread mainly used for spiral transmission and bidirectional loading. Therefore, under the condition of the same thread diameter, the thread deformation is smaller, the rolling mill rigidity is higher, and the rolling precision is improved.
[0039] Preferably, the buffer pad 6 is spherical. Of course, in this embodiment, according to actual conditions and specific needs, the buffer pad 6 can also be arranged in other shapes, which is not limited here.
[0040] For further information, see Figure 1 and Figure 2 As shown, the end of the stop nut 5 close to the buffer pad 6 is provided with a spherical portion adapted to the buffer pad 6. The spherical portion is adapted to the structure of the buffer pad 6, so that a spherical pair can be formed through the spherical portion of the stop nut 5 and the spherical buffer pad 6. The spherical pair can adapt to the swing of the first bearing seat 3 and the second bearing seat 4 under the rolling force.
[0041] For further information, see Figure 2 As shown, the inclination angle of one side of the thread teeth of the thread is defined as A, and the inclination angle of the other side of the thread teeth of the thread is defined as B, and the inclination angle B is greater than the inclination angle A. Preferably, the degree of the inclination angle A is 3-17°, and specifically, the degree of the inclination angle A is 3°, 5°, 7°, 8°, 10°, 12°, 14°, 15°, etc. By setting it to the degree range of the inclination angle, it is possible to achieve better bearing of the rolling force. Of course, in this embodiment, according to actual conditions and specific needs, the inclination angle of the inclination angle A can also be set to other degrees, which is not the only limitation here.
[0042] For further information, see Figure 2 As shown, it also includes a fastening assembly 7, which can be used to fix each stop nut 5. Specifically, the fastening assembly 7 includes an end cover 71 and a stop pin 72. The end cover 71 is sleeved on the pull rod 2, one end of the stop pin 72 is arranged on the end cover 71, and the other end of the stop pin 72 is arranged on the stop nut 5. In this way, the stop nut 5 can be fixed to the support 1 through the stop pin 72, so that the pull rod 2 and the stop nut 5 can move relative to each other.
[0043] For further information, see Figure 1 As shown, the pull rod 2 is also sleeved with an abutting nut 73, which is located between the end cover 71 and the stop nut 5. The abutting nut 73 is provided with a fixing through hole for the stop pin 72 to pass through, and the abutting nut 73 abuts against the stop nut 5. In this way, by providing the abutting nut 73, the stop nut 5 can be pushed by the abutting nut 73, the thread gap between the stop nut 5 and the pull rod 2 can be eliminated, the rolling impact can be avoided, and the rolling accuracy can be improved; by providing the fixing through hole on the abutting nut 73, the abutting nut 73 can be fixed by the stop pin 72, so that the pull rod 2 can rotate relative to the abutting nut 73 later.
[0044] For further information, see Figure 2 As shown, a pin shaft 8 is also provided in the end cover 71, and an elastic member 9 is sleeved on the pin shaft 8. The elastic member 9 can elastically push the abutment nut 73 to continuously abut against the stop nut 5, thereby effectively eliminating the thread gap between the stop nut 5 and the pull rod 2 and the gap between the stop nut 5 and the buffer pad 6, thereby greatly improving the rolling accuracy.
[0045] Preferably, the elastic member 9 is a disc spring, which is compressed and arranged between the abutment nut 73 and the end cover 71. The compression force of the disc spring can effectively eliminate the thread gap between the stop nut 5 and the pull rod 2 and the gap between the stop nut 5 and the buffer pad 6. Of course, in this embodiment, the elastic member 9 can also be set as a spring sheet, a spring needle, etc., which is not limited here.
[0046] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.
Claims
1. A rolling mill, characterized in that: include: Support; A pull rod rotatably mounted in the support; A first bearing seat is movably arranged on the pull rod, and a first roller is rotatably mounted inside the first bearing seat; A second bearing seat is movably mounted on the pull rod and spaced apart from the first bearing seat, wherein a second roller is rotatably mounted inside the second bearing seat and cooperates with the first roller to press the steel; A pair of stop nuts are fixedly installed in the support at intervals and sleeved on the pull rod, and are used to cooperate with the pull rod to bear the rolling force generated during the rolling process of the first roller and the second roller; The pull rod is provided with threads which cooperate with the stop nuts, and the threads are arranged in a sawtooth shape.
2. A rolling mill according to claim 1, characterized in that: A buffer pad is provided between the first bearing seat and the stop nut.
3. A rolling mill according to claim 2, characterized in that: The buffer pad is arranged in a spherical shape.
4. A rolling mill according to claim 3, characterized in that: The end of the stop nut close to the buffer pad is provided with a spherical portion matched with the buffer pad.
5. A rolling mill according to claim 1, characterized in that: The inclination angle of one side surface of the thread tooth of the thread is defined as A, and the inclination angle of the other side surface of the thread tooth of the thread is defined as B, and the inclination angle B is greater than the inclination angle A.
6. A rolling mill according to claim 5, characterized in that: The degree of the inclination angle A is 3-17°.
7. A rolling mill according to claim 1, characterized in that: It also includes a fastening assembly for fixing each of the stop nuts, the fastening assembly includes an end cover sleeved on the pull rod, and a stop pin for fixing the stop nut, one end of the stop pin is arranged on the end cover, and the other end of the stop pin is arranged on the stop nut.
8. A rolling mill according to claim 7, characterized in that: The pull rod is also sleeved with an abutting nut for abutting the stop nut. The abutting nut is located between the end cover and the stop nut. The abutting nut is provided with a fixing through hole for the stop pin to pass through.
9. A rolling mill according to claim 8, characterized in that: A pin is also provided in the end cover, and an elastic member for elastically pushing up the abutment nut is sleeved on the pin.
10. A rolling mill according to claim 9, characterized in that: The elastic member is a disc spring.