Three-roller mill for cold-rolled steel bars
By adopting the driving form of active rolls and passive rolls in the cold rolling three-roll mill, and adjusting the rolling pressure and gap through the press and adjusting the screw, the problems of low load capacity and mechanical performance of the existing cold rolling three-roll mill are solved, and higher rolling pressure and better mechanical performance are achieved.
Patent Information
- Application Number
- CN202421959649.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-14
- Publication Date
- 2025-06-17
- Estimated Expiration
- 2034-08-14
AI Technical Summary
The existing cold rolling three-roll mill has low load-bearing capacity, complex driving mechanism, and limited installation space, resulting in limited rolling pressure and lack of heat treatment processes, and the product's mechanical performance does not meet the standards.
The driving form of active rolls and passive rolls is adopted, and the rolling pressure is applied through the press, and the rolling gap is adjusted by adjusting the lead screw to increase the rolling pressure to more than 30 tons, and the radial adjustment distance of the roll reaches 50mm.
The drive mechanism is simplified, the rolling pressure and roll adjustment capabilities are improved, the problems of insufficient load-bearing capacity and insufficient mechanical performance are solved, and the mechanical performance and production efficiency of the product are improved.
Smart Images
Figure CN222985230U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a rolling mill used for cold-rolled steel bars, in particular to a three-roll rolling mill, belonging to the technical field of equipment. Background Art
[0002] At present, the three-sided rib products produced by the drawing process on the market are mainly applied to the civil market with low quality requirements. The production process is as follows:
[0003]
[0004] , due to the inherent defects of the production process, after rolling and forming and traction, the straight bar products still need to pass through a straightening machine, which will inevitably have an adverse effect on the product shape (rib height, surface scratches, etc.). Moreover, there is no heat treatment process after rolling, and the mechanical properties of the products do not meet the standards. After inquiry, there is a three-roll rolling mill with a mature active structure on the market at present. All three rolls are of an active structure (also called a Y-type rolling mill), and its load-bearing capacity is low. At the same time, it is continuous rolling with more than multiple passes, and the radial adjustment distance of the rolls is generally less than 10 mm. For example, the active three-sided rib cold-rolled ribbed steel bar rolling mill disclosed in Chinese Patent Application No. 2009101915613 is a rolling mill with all three rolls being of an active structure. Its drive mechanism is complex and the installation space is limited, resulting in the rolling pressure (load-bearing capacity) being restricted, and the rolling pressure generally does not exceed 10 tons. Summary of the Invention
[0005] The purpose of the utility model is to overcome the above problems existing in the current cold-rolled three-roll rolling mill, and provide a three-roll rolling mill for cold-rolled steel bars.
[0006] To achieve the purpose of the utility model, the following technical solution is adopted: A three-roll rolling mill for cold-rolled steel bars includes a rolling mill housing and three rolls. The angle between two adjacent rolls is 120 degrees. There is a material passing opening on the rolling mill housing for the steel bars to pass through. Among the three rolls, the axial direction of the lower roll is horizontal from left to right. The lower roll is a powered active roll, and the other two rolls are unpowered passive rolls. The active roll is rotationally installed on a hinge platform through a roll shaft. The hinge platform is hinged to the rolling mill housing through a hinge seat. The roll shaft is connected to a power driving device. The upper part of the hinge platform is hinged to the rolling mill housing, and the lower part is hinged to the output end of a press. The two passive rolls are respectively rotationally installed on wheel seats. The lower part of the wheel seat is hinged to the rolling mill housing, and the upper part is hinged to the end of an adjusting screw rod in the front-back direction. The adjusting screw rod is screwed onto the rolling mill housing through a thread.
[0007] Furthermore, there is an inclined surface on the hinge platform that slopes downward from front to back. The roll shaft is rotationally supported through a bearing and installed on the inclined surface. The roll is fixedly connected to the roll shaft.
[0008] The positive and beneficial technical effects of the present utility model are as follows: This rolling mill adopts the driving form of a driving roll and a driven roll, the driving mechanism is relatively simple, and the rolling pressure is applied by a press. The gap can be adjusted through a lead screw, the rolling pressure can reach more than 30 tons, and the radial adjustment distance of the roll reaches 50 mm. Brief Description of the Drawings
[0009] Figure 1 It is one of the schematic diagrams of the present utility model.
[0010] Figure 2 It is the second schematic diagram of the present utility model. Detailed Description of the Preferred Embodiment
[0011] In order to more fully explain the implementation of the present utility model, implementation examples of the present utility model are provided. These implementation examples are only for the elaboration of the present utility model and do not limit the scope of the present utility model.
[0012] With reference to the accompanying drawings, the present utility model is further explained in detail. The reference numerals in the drawings are as follows: 1: rolling mill housing; 2: hinge seat; 3: hinge table; 4: bearing seat; 5: roll shaft; 6: driving roll; 7: driven roll A; 8: wheel seat A; 9: adjusting lead screw A; 10: roll B; 11: wheel seat B; 12: adjusting lead screw B; 13: output end of the press; 14: material passing opening; 15: press.
[0013] As shown in the accompanying drawings, a three-roll rolling mill for cold-rolled steel bars includes a rolling mill housing and three rolls. The adjacent two rolls are spaced 120 degrees apart. There is a material passing opening 14 on the rolling mill housing for the steel bars to pass through. The axial direction of the lower roll among the three rolls is horizontal left and right. The lower roll is a driving roll 6 with power. The driving roll 6 is rotatably installed on the hinge table 3 through the roll shaft 5. In this embodiment, there is an inclined surface on the hinge table that slopes downward from front to back. The roll shaft is rotatably supported by bearings in the bearing seat 4, and the bearing seat is fixedly connected to the inclined surface. The driving roll 6 is fixedly connected to the roll shaft. The hinge table 3 is hinged to the rolling mill housing through the hinge seat 2. The upper part of the hinge table is hinged to the rolling mill housing, and the lower part is hinged to the output end 13 of the press. The press 15 is fixedly arranged on the rolling mill housing.
[0014] The other two rollers are driven rollers A7 and driven roller B10 without power. The driven roller A7 is rotatably installed on the wheel seat A8. The lower part of the wheel seat A8 is hinged to the rolling mill housing, and the upper part is hinged to the end of the adjusting screw A9 in the front-rear direction. The adjusting screw A9 is screwed onto the rolling mill housing through a thread; the driven roller B10 is rotatably installed on the wheel seat B11. The lower part of the wheel seat B11 is hinged to the rolling mill housing, and the upper part is hinged to the end of the adjusting screw B12 in the front-rear direction. The adjusting screw A is screwed onto the rolling mill housing through a thread. The steel bars enter between the three rollers after passing through the material passing port 14. The rolling pressure can be adjusted by a press, and the gap between the three rollers can be adjusted by the adjusting screw.
[0015] After the embodiments of the present invention are described in detail, those skilled in the art can clearly understand that various changes and modifications can be made without departing from the scope and spirit of the above-mentioned patent application. Any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention all belong to the scope of the technical solution of the present invention, and the present invention is not limited to the embodiments described in the specification.
Claims
1. A three-roller rolling mill for cold-rolled steel bars, comprising a rolling mill arch and three rolling rollers, wherein the interval between two adjacent rolling rollers is 120 degrees, and a material passage for steel bars to pass through is provided on the rolling mill arch, characterized in that: The axial direction of the lower roller among the three rollers is horizontal left and right, the lower roller is an active roller with power, and the other two rollers are passive rollers without power. The active roller is rotatably installed on the articulated table through the roller shaft, the articulated table is hinged on the rolling mill arch through the articulated seat, the roller shaft is connected to the power drive device, the upper part of the articulated table is hinged on the rolling mill arch, and the lower part is hinged on the output end of the press, the two passive rollers are rotatably installed on the wheel seat, the lower part of the wheel seat is hinged on the rolling mill arch, and the upper part is hinged to the end of the adjusting screw in the front and rear directions, and the adjusting screw is screwed on the rolling mill arch through a thread.
2. The three-roller mill for cold-rolled steel bars according to claim 1, characterized in that: The hinged table is provided with an inclined plane which is inclined downward from the front to the rear. The roller shaft is rotatably mounted on the inclined plane through bearing support, and the roller is fixedly connected to the roller shaft.