Three-side rib cold-rolled steel bar rolling mill

Abstract

A three-face rib cold-rolled steel bar rolling mill comprises a machine frame, three rollers are rotationally installed on the machine frame, one roller is a driving roller with power, the other two rollers are driven rollers without power, the driving roller is fixedly connected to a roller shaft in the horizontal left-right direction, and the roller shaft is supported in a bearing seat through a bearing. The bearing seat is fixedly connected to the machine frame, the roller shaft is connected with a power driving mechanism, the two driven rollers are located on the two sides above the driving roller respectively, the two driven rollers are rotationally arranged on U-shaped wheel frames respectively, the U-shaped wheel frames are fixedly connected to sliding blocks, the sliding blocks are in sliding fit with guide rails in the left-right direction, and driving rods are arranged on the left side and the right side of the machine frame respectively. The driving rod is provided with three hinge points from top to bottom, the upper hinge point is hinged to the sliding block, the middle hinge point is hinged to the machine frame, the lower hinge point is hinged to the output end of the press machine, and the press machine is fixedly installed on the machine frame. The rolling mill can obtain higher rolling force.

Description

Technical Field

[0001] The utility model relates to a cold-rolled ribbed steel bar rolling mill, in particular to a three-sided rib cold-rolled ribbed steel bar rolling mill, belonging to the technical field of equipment. Background Art

[0002] The new national standard GB13788-2024 of cold-rolled ribbed steel bars was released on June 25, 2024 and implemented on September 25, 2024. Different from previous versions which were all recommended standards, the new national standard will be changed to a mandatory standard. Regarding CRB550 products, the existing standards do not limit their shapes, while the new national standard stipulates that the shape of this product can only be in the shape of three-sided ribs. Currently, the three-sided ribbed steel bars are mainly produced by the drawing process and are mainly applied to the civilian market with relatively low quality requirements. 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 impact on the product shape (rib height, surface scratches, etc.), and it is difficult to meet the strength and plasticity indexes of the current cold-rolled steel bars. Regarding the three-sided rib cold-rolled ribbed steel bar rolling mill, currently, basically all three rolls are powered (all are active rolls). For example, the active three-sided rib cold-rolled ribbed steel bar rolling mill disclosed in Chinese Patent Application No. 2009101915613 has a complex transmission mechanism and occupies a large space, resulting in limitations on the configured power equipment. The rolling force is generally not higher than 10 tons, and the radial adjustment distance of the rolls does not exceed 10 mm. Its compatibility is poor and it is difficult to meet the usage requirements of large-scale and high-speed cold rolling. Summary of the Invention

[0003] The purpose of the utility model is to provide a three-sided rib cold-rolled ribbed steel bar rolling mill to meet the production needs of three-sided rib cold-rolled ribbed steel bars.

[0004] To achieve the purpose of the utility model, the following technical solution is adopted: A three-sided rib cold-rolled ribbed steel bar rolling mill includes a frame. Three rolls are rotatably installed on the frame, and the three rolls are arranged at intervals of 120 degrees. One of the three rolls is a powered active roll, and the other two are non-powered passive rolls. The active roll is fixedly connected to a roll shaft in the horizontal left-right direction. The roll shaft is supported in a bearing seat through bearings, and the bearing seat is fixedly connected to the frame. The roll shaft is connected to a power driving mechanism. The two passive rolls are respectively located on both sides above the active roll. The two passive rolls respectively rotate on a U-shaped wheel frame. The U-shaped wheel frame is fixedly connected to a slider, and the slider is slidably fitted on a guide rail in the left-right direction. Driving rods are respectively arranged on the left and right of the frame. The driving rod has three hinge points from top to bottom. The upper hinge point is hinged to the slider, the middle hinge point is hinged to the frame, and the lower hinge point is hinged to the output end of a press. The press is fixedly installed on the frame.

[0005] Further, the two passive rolls are symmetrically arranged with the active roll as the center line.

[0006] Further, drive rods are provided on both the front and rear sides of each slider.

[0007] The positive and beneficial technical effects of the present utility model are as follows: The structure of this rolling mill is relatively simple, a relatively high rolling force can be obtained, and the adjustment range of the gap between the rolls is large. Description of the Drawings

[0008] Figure 1 is one of the schematic diagrams of the present utility model.

[0009] Figure 2 is the second schematic diagram of the present utility model. Detailed Description of the Embodiment

[0010] To more fully explain the implementation of the present utility model, embodiments of the present utility model are provided. These embodiments are merely elaborations of the present utility model and do not limit the scope of the present utility model.

[0011] With reference to the accompanying drawings, the present utility model is further explained in detail. In the drawings, each reference numeral is as follows: 1: frame; 2: main shaft roll; 3: bearing seat; 4: roll shaft; 5: passive roll; 6: U-shaped wheel frame; 7: slider; 8: guide rail; 9: drive rod; 10: press.

[0012] As shown in the accompanying drawings, a three-sided rib cold-rolled steel bar rolling mill includes a frame 1. Three rolls are rotatably installed on the frame. The three rolls are arranged at intervals of 120 degrees. The steel bar passes between the three rolls. One of the three rolls is a powered main roll 2, and the other two are unpowered passive rolls. The two passive rolls are symmetrically arranged with the main roll as the midline. The main roll 2 is fixedly connected to a roll shaft 4 in the horizontal left-right direction. The roll shaft 4 is supported in a bearing seat 3 through bearings. The bearing seat is fixedly connected to the frame 1. The roll shaft 4 is connected to a power driving mechanism. The power driving mechanism usually adopts a motor, and the motor is usually connected to the roll shaft through a coupling. The two passive rolls are respectively located on both sides above the main roll. The passive roll 5 rotates on a U-shaped wheel frame 6. The U-shaped wheel frame 6 is fixedly connected to a slider 7. The slider 7 is slidably engaged with a guide rail 8 in the left-right direction. The upper hinge point is hinged to the slider 7, the middle joint point is hinged to the frame 1, and the lower hinge point is hinged to the output end of the press 10. In this embodiment, drive rods are provided on both the front and rear sides of each slider (as Figure 2 shown). The lower ends of the two drive rods in front of and behind each slider are fixedly connected together and then hinged to the output end of the press. The output end of the press can perform a linear displacement. The press 10 is fixedly installed on the frame.

[0013] After describing the embodiments of the present utility model 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 modification, equivalent change, and modification made to the above embodiments based on the technical essence of the present utility model all belong to the scope of the technical solution of the present utility model, and the present utility model is also not limited to the embodiments described in the specification.

Claims

1. A three-sided rib cold-rolled steel bar rolling mill, comprising a frame, on which three rollers are rotatably mounted, the three rollers being arranged 120 degrees apart, characterized in that: One of the three rollers is a powered active roller, and the other two are unpowered passive rollers. The active roller is fixedly connected to the roller shaft in the horizontal left and right directions. The roller shaft is supported in the bearing seat through bearings. The bearing seat is fixedly connected to the frame. The roller shaft is connected to the power drive mechanism. The two passive rollers are respectively located on both sides above the active roller. The two passive rollers rotate on a U-shaped wheel frame respectively. The U-shaped wheel frame is fixedly connected to the slider. The slider slides on the guide rails in the left and right directions. Driving rods are respectively arranged on the left and right sides of the frame. The driving rod has three hinge points from top to bottom. The upper hinge point is hinged on the slider, the middle intersection point is hinged on the frame, and the lower hinge point is hinged on the output end of the press. The press is fixedly installed on the frame.

2. A three-side rib cold-rolled steel bar rolling mill according to claim 1, characterized in that: The two passive rollers are symmetrically arranged with the active roller as the center line.

3. The three-side rib cold-rolled steel bar rolling mill according to claim 1, characterized in that: A driving rod is provided on both the front and rear sides of each slider.

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