Extra-heavy modular rolling mill unit
By designing the super heavy duty modular rolling mill unit, using a separate transmission cone box and three-stage gear transmission, the problems of small specification range and slow rolling speed of the finished molding mill are solved, and greater rolling force and faster rolling speed are achieved, spare parts replacement is simplified, and production efficiency and finished product quality are improved.
Patent Information
- Application Number
- CN202421750489.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-23
- Publication Date
- 2025-07-08
- Estimated Expiration
- 2034-07-23
AI Technical Summary
The finished product specification range of existing module rolling mills is small, the rolling speed is slow, and the cone box replacement is difficult, resulting in difficult improvement in production efficiency and finished product quality.
A super heavy duty modular rolling mill unit is designed, using a separate transmission cone box arranged face-to-face with a top intersection of 45°. Two sets of transmission systems drive two roller boxes respectively, combining three-stage gear transmission and variable speed gearbox to achieve flexible configuration speed ratio and rolling specification adjustment.
It improves rolling force and steel overspeed, expands the rolling specification span, reduces the number of spare parts, simplifies the replacement process, and improves production flexibility and finished product quality.
Smart Images
Figure CN223070143U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of metallurgical rolling equipment, in particular to an ultra-heavy modular rolling mill unit. Background Art
[0002] At present, the main rolling mill models of bar production lines in the market are 230-250, and the size of the rolled rebar is generally 6-20mm, which cannot solve the problem of larger specification span. In the past, domestic bar production lines mainly used multi-line slitting, with the fastest rolling speed reaching 16-18m / s. Generally, short stress rolling mills were used as the last stand to roll finished products. With the continuous improvement of the efficiency, speed and quality of finished products in the steel rolling production line in recent years, modular rolling mills have been added to the high-speed bar production line system. The modular rolling mill is a kind of equipment for rolling and extending the rolled pieces. It is an indispensable and very critical equipment on the continuous steel rolling production line. As the finished product rolling mill of the last few passes of the bar production line, the modular rolling mill determines the dimensional accuracy, rolling speed, rolling specifications, etc. of the final finished product of the steel rolling production line.
[0003] Moreover, the 45° transmission cone boxes of modular rolling mills on the current market are all two-in-one structures. Whether from processing, testing, assembly, to the final installation and use and replacement of spare machines, the entire process and manufacturing cost are relatively difficult. For example, if one of the cone boxes has a problem during the user's production process, the entire two-in-one cone box needs to be replaced.
[0004] Therefore, it is required to design a modular rolling mill with high rolling force, fast rolling speed, good rigidity, flexible replacement of spare machines, stable operation and other performance requirements. Utility Model Content
[0005] In view of this, the purpose of the utility model is to provide an ultra-heavy modular rolling mill unit to alleviate the problems of small finished product specification range and slow finished product rolling speed of the modular rolling mill.
[0006] In a first aspect, an embodiment of the utility model provides an ultra-heavy modular rolling mill unit, based on a cone box and a transmission system, wherein the cone boxes are provided in two sets, and are separate transmission cone boxes arranged face to face at a 45° angle;
[0007] The transmission system consists of two sets, including a motor and a speed gearbox, wherein the motor is connected to the input shaft of the speed gearbox through a first drum gear coupling, and the output shaft of the speed gearbox is connected to the input shaft of the cone box through a second drum gear coupling;
[0008] A separate roller box is arranged inside the cone box, and a roller shaft is arranged inside the roller box. The two sets of the transmission systems correspond to and drive the two roller boxes separately.
[0009] Preferably, the conical box includes a conical shaft system, an input shaft system and an intermediate gear shaft system; a large bevel gear is installed on the input shaft system; a small bevel gear and a helical gear are installed on the conical shaft system, the small bevel gear is meshed and connected with the large bevel gear, and the helical gear is drivingly connected with the roll shaft.
[0010] Preferably, the helical gear serves as a driving wheel and forms a four-gear drive with the driven wheels of the intermediate gear shaft system and the two roll shafts.
[0011] Preferably, the input shaft system is supported at both ends, with a pair of tapered roller bearings arranged back-to-back at one end and cylindrical roller bearings at the other end; the conical shaft system is supported at both ends, with an angular contact ball bearing and a cylindrical roller bearing arranged in combination at one end and cylindrical roller bearings at the other end.
[0012] Preferably, the center distance between the roll shafts of the roll box is below 290 mm, and the outer diameter of the roll is below 285 mm.
[0013] Preferably, a protective cover is further included.
[0014] Preferably, the motor, the speed-changing gearbox and the conical box are all provided with bases.
[0015] The embodiments of the present utility model bring the following beneficial effects:
[0016] The present utility model splits the two-in-one conical box into two 45° single-body drive conical boxes, making the entire drive system more reasonable in terms of production, manufacturing, inspection and installation than the two-in-one box. When the user replaces the standby machine, single-unit replacement can be carried out, reducing the number of spare parts and making the positioning of spare parts more accurate. Moreover, the steel-passing speed is increased, the rolling specification span is larger, the rolling force is greater, and the diversity and selectivity of the product specifications produced by the user are improved.
[0017] Ultimately, the present utility model realizes three-stage gear drive, and the speed ratio can be flexibly configured according to the rolling process, greatly improving the rolling speed. And through the speed increase and decrease design of the speed-changing gearbox, the rolling specifications and speed can be flexibly adjusted.
[0018] The rolling mill conical box of the present utility model is of a modular structure. One module unit is two passes, and two conical boxes can be installed on a large base. The user can separately replace the conical box, the roll box, the gearbox, the motor, etc. according to the usage situation without affecting the other pass, reducing the number of spare parts for the user.
[0019] Other features and advantages of the present utility model will be described in the subsequent description, and part of them will be obvious from the description or understood by implementing the present utility model. The objectives and other advantages of the present utility model are realized and obtained by the structures specifically pointed out in the description, the claims and the drawings.
[0020] To make the above objects, features, and advantages of the present utility model more obvious and understandable, the following provides preferred embodiments in conjunction with the accompanying drawings and detailed descriptions are as follows. Description of the Drawings
[0021] Figure 1 It is a schematic diagram of the front view of the ultra - heavy - duty modular rolling mill unit provided by the present utility model;
[0022] Figure 2 It is a schematic diagram of the top view of the ultra - heavy - duty modular rolling mill unit provided by the present utility model;
[0023] Figure 3 It is a sectional view of the drive system of one rolling mill facing the operator side in the ultra - heavy - duty modular rolling mill unit provided by the present utility model;
[0024] Figure 4 It is a sectional view of the drive system of another rolling mill facing away from the operator side in the ultra - heavy - duty modular rolling mill unit provided by the present utility model;
[0025] In the drawings, the structures represented by each symbol are as follows: 1 - motor; 2 - first drum - shaped tooth coupling; 3 - speed - change gearbox; 4 - second drum - shaped tooth coupling; 5 - bevel box; 6 - roll box; 7 - protective cover;
[0026] 11 - input shaft shafting; 12 - large bevel gear; 13 - input shaft tapered roller bearing; 14 - input shaft cylindrical roller bearing; 15 - small bevel gear; 16 - bevel shaft shafting; 17 - combination of cylindrical roller bearing and angular contact ball bearing on the bevel shaft; 18 - lower cylindrical roller bearing of the bevel shaft; 19 - helical gear; 20 - idler shaft shafting; 21 - left roll shaft; 22 - right roll shaft. Detailed Embodiment
[0027] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts fall within the scope of protection of the present utility model.
[0028] Based on this, an ultra - heavy - duty modular rolling mill unit provided by an embodiment of the present utility model, as Figures 1 - 4 , is arranged in two passes, and in the last few passes of the steel rolling production line, based on two bevel boxes 5, two sets of drive systems, and one protective cover 7, the bevel box 5 is a separately - driven bevel box arranged face - to - face with a top intersection of 45°;
[0029] The protective cover 7 is driven by two hydraulic cylinders, used in conjunction with two proximity switches (open, closed), and a mechanical bolt can be manually inserted after the protective cover is opened to ensure the safe progress of manual operations.
[0030] The transmission system includes a motor 1 and a speed-changing gearbox 3. The motor 1 is driven independently and is transmission-connected to the input shaft of the speed-changing gearbox 3 through a first drum tooth coupling 2. The output shaft of the speed-changing gearbox 3 is transmission-connected to the input shaft of the cone box 5 through a second drum tooth coupling 4.
[0031] A separate roller box 6 is provided inside the cone box 5. A roller shaft is installed in the roller box 6, and the two sets of transmission systems respectively drive the two roller boxes 6 independently.
[0032] The cone box 5 includes a cone shaft system 16, an input shaft system 11, and an idler gear shaft system 20; a large bevel gear 12 serving as a driving wheel, an input shaft tapered roller bearing 13, and an input shaft cylindrical roller bearing 14 are installed on the horizontally arranged input shaft system 11; a small bevel gear 15 serving as a driven wheel, a helical gear 19 serving as a driving wheel, a combination of a cylindrical roller bearing and an angular contact ball bearing 17 on the cone shaft, and a lower cylindrical roller bearing 18 of the cone shaft are installed on the cone shaft system 16. The small bevel gear 15 is meshed and connected with the large bevel gear 12, and the helical gear 19 is transmission-connected to the roller shaft. The helical gear 19 forms a four-gear transmission with the driven wheels of the idler gear shaft system 20, the left roller shaft 21, and the right roller shaft 22, and the final output shafts are two roller shafts. The small bevel gear 15 is located below the cone shaft system 16, and the helical gear 19 is located above the cone shaft system 16.
[0033] Among them, the motor 1 is the input end, and through the first-stage gear transmission of the speed-changing gearbox 3 to the cone box 5, there is a first-stage bevel gear plus a first-stage helical gear transmission mechanism inside the cone box 5. Through the two-stage transmission inside the cone box 5, finally, the roller shaft in the roller box 6 is driven by the helical gear to roll the rolled piece.
[0034] Further, according to the requirements of the rolling process, the first-stage helical gear can be designed to increase or decrease the speed;
[0035] Further, the input shaft system 11 is supported at both ends. One end is arranged with a pair of tapered roller bearings 13 back to back. While meeting the required speed of rolling, the tapered roller bearings 13 can bear a large axial force and a small amount of radial force; the other end is a cylindrical roller bearing 14, which mainly bears the radial force.
[0036] Further, the cone shaft system 16 is supported at both ends. One end is arranged with a combination of an angular contact ball bearing and a cylindrical roller bearing 17. The angular contact bearing bears the axial force; the other end is a cylindrical roller bearing 18, which mainly bears the radial force.
[0037] Further, the maximum center distance of the roll shafts in the roll box is 290 mm, and the maximum outer diameter of the rolls is 285 mm.
[0038] Further, the motor, the speed-changing gearbox, and the taper box are all provided with bases.
[0039] Further, the overall shafting components are made of medium carbon steel by quenching and tempering, the gears are made of low carbon steel by carburizing and quenching and the matching of the module and the number of teeth is increased, and the bearings are imported bearings. The bearings with the largest load-carrying capacity are selected on the premise of meeting the highest rolling speed. Therefore, it can meet the rolling of ribbed steel bars with a maximum diameter of 25 mm and the target of a rolling force of 35 t.
[0040] In this embodiment, the power of the motor drive end is generally 1200 - 2000 kw, and the speed is 600 - 1250 r / min. The motor is driven separately, and the adjustment and requirements of different rolling speeds can be realized. The next-level speed-changing gearbox can be designed to increase or decrease the speed according to the rolling process. Generally, i = 0.3 - 3 or so, and it can be adjusted to meet the requirements of different specifications, spans and speeds. The fixed speed ratio in the taper box can be configured between i = 0.4 - 0.6. In this way, through the motor - gearbox - taper box, the rotational speed transmitted to the roll shaft can reach 3500 r / min, and the final designed rolling speed v = 3.14 * D * n / 60 = 3.14 * 0.255 * 3500 / 60 = 46.7 m / s, which can fully meet the target of the finishing rolling speed of 45 m / s.
[0041] It should be noted that in this article, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device.
[0042] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A super heavy-duty modular rolling mill unit, based on a taper box and a drive system, characterized in that The two conical boxes are arranged face to face with a 45° top intersection and are separate drive conical boxes. There are two sets of the transmission system, including a motor and a speed-changing gearbox. The motor is drivingly connected to the input shaft of the speed-changing gearbox through a first crowned tooth coupling, and the output shaft of the speed-changing gearbox is drivingly connected to the input shaft of the conical box through a second crowned tooth coupling. A separate roll box is provided inside the conical box. A roll shaft is installed in the roll box, and the two sets of the transmission system respectively drive the two roll boxes independently.
2. The ultra-heavy modular rolling mill unit according to claim 1, wherein The conical box includes a conical shaft system, an input shaft system and an idler shaft system; A large bevel gear is installed on the input shaft system; A small bevel gear and a helical gear are installed on the conical shaft system. The small bevel gear is meshingly connected to the large bevel gear, and the helical gear is drivingly connected to the roll shaft.
3. The ultra-heavy modular rolling mill unit according to claim 2, wherein The input shaft system is supported at both ends. One end is arranged with a pair of tapered roller bearings back to back, and the other end is a cylindrical roller bearing; The conical shaft system is supported at both ends. One end is arranged with a combination of an angular contact ball bearing and a cylindrical roller bearing, and the other end is a cylindrical roller bearing.
4. The ultra-heavy modular rolling mill unit according to claim 2, wherein The helical gear serves as a driving wheel and forms a four-gear drive with the driven wheel of the idler shaft system and the driven wheels of the two roll shafts.
5. The ultra-heavy modular rolling mill unit according to claim 1, characterized in that The center distance between the roll shafts of the roll box is less than 290 mm, and the outer diameter of the roll is less than 285 mm.
6. The ultra-heavy modular rolling mill unit according to claim 1, characterized in that, It further includes a protective cover, and the protective cover is driven by two hydraulic cylinders and used in cooperation with two proximity switches.
7. The ultra-heavy modular rolling mill unit according to claim 1, characterized in that, The motor, the speed-changing gearbox and the conical box are all provided with bases.