Unlock instant, AI-driven research and patent intelligence for your innovation.

Rolling process method based on ф55mm~ф75mm round steel common pass system

A process method and pass technology, which is applied in the field of rolling technology based on the Ф55mm~Ф75mm round steel common pass system, can solve the problems of large number of spare parts for rolling mills and rolls, long time for changing specifications, frequent changing specifications, etc., to reduce spare parts The effect of reducing the quantity, facilitating stable control, and shortening the time for replacing rolling mills

Active Publication Date: 2022-05-17
TIANJIN IRON & STEEL GRP
View PDF8 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The company adopts the mode of production based on sales, pricing and order, and agreement and contract to organize production, rather than mass production of a single specification. This production organization mode results in frequent specification changes, a large number of rolling mills and rolls in reserve, and a long time for specification replacement. Seriously affect production efficiency

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Rolling process method based on ф55mm~ф75mm round steel common pass system
  • Rolling process method based on ф55mm~ф75mm round steel common pass system
  • Rolling process method based on ф55mm~ф75mm round steel common pass system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Production specification: Ф55mm round steel

[0046] Steel grade: 45

[0047] Rolling mills used: racks 1 to 12

[0048] Table 5 Ф55mm round steel rolling schedule

[0049]

[0050] Production furnace number: 1008757, 1008760, 3010934, 2011035, 3010942, 1008769, 1008770

[0051] Heating in the 160 billet heating furnace to the rolling start temperature of 1020°C-1040°C, entering the rough rolling mill stand 1-6 for rolling, and after the 1# pendulum shear head, enters the intermediate rolling mill stand 7-8 for overhead conduction The trough is rolled from the 9th to the 12th stand. The round steel runs stably through the rough rolling and intermediate rolling mills, and there is no rolling tension fluctuation and rolled piece jitter; the finished product is produced from the 12th stand, and the caliper measures the round steel. Diameter and out-of-roundness, 2# rotary shears cut into 2 double-size rolled materials and directly go to the cooling bed for natural co...

Embodiment 2

[0053] Production specification: Ф65mm round steel

[0054] Steel grade: 20

[0055] Rolling mills used: racks 1 to 10

[0056] Replacing specifications: changing from Ф55mm to Ф65mm round bar, removing the 11th and 12th rolling mills, and adjusting the roll gap of the 5th, 6th, 9th, and 10th stands, which took a total of 30 minutes.

[0057] Table 6 Ф65mm round steel rolling schedule

[0058]

[0059] Production furnace number: 1009337, 1009338, 6011543, 2011620, 1009485, 2011756

[0060] Heating in the 160 billet heating furnace to the rolling start temperature of 1000°C-1030°C, entering the rough rolling mill stand 1-6 for rolling, and after the 1# pendulum shear head, enters the intermediate rolling mill stand 7-8 for overhead conduction The trough, the rolling of the 9th to the 10th stand, the round steel rolling operation is stable after the rough rolling and the intermediate rolling mill, and there is no rolling tension fluctuation and rolled piece jitter phenomen...

Embodiment 3

[0062] Production specification: Ф60 round steel

[0063] Steel grade: Q355B

[0064] Rolling mills used: racks 1 to 10

[0065] Table 7 Ф60mm round bar rolling schedule

[0066]

[0067] Production furnace number: 1007675, 3009799, 3009831, 3009827, 1007691

[0068] Heating in a 160 billet heating furnace to a rolling start temperature of 1050°C-1070°C, rolling into the 1st to 6th stands of the rough rolling mill, and rolling into the 7th to 10th stands of the middle rolling mill after the 1# pendulum shear head. The steel was rolled in 10 passes with 6 rough rolling stands and 4 intermediate rolling stands, which reduced the 4 empty passes of the intermediate rolling mill. When the finished product is produced, the diameter measuring instrument measures the diameter and out-of-roundness of the round steel. The rolled material is directly cooled on the cooling bed for natural cooling. Packing, weighing, identification, storage. The average yield strength of round stee...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
tensile strengthaaaaaaaaaa
yield strengthaaaaaaaaaa
tensile strengthaaaaaaaaaa
Login to View More

Abstract

The invention discloses a rolling process method based on the common pass system of Ф55mm-Ф75mm round steel. By analyzing the pass system and rolling process parameters, the round steel with a specification of Ф55mm‑Ф75mm is designed as two sets of shared pass systems; the design Ф55mm Ф65mm and Ф65mm specifications are a set of common pass system, after adjustment it is shared by 8 rolling mill passes and 2 passes are shared by empty guide grooves; design Ф60mm and Ф75mm specifications are a set of shared pass system, after adjustment it is 8 rolling mill passes Shared; Ф60mm and Ф65mm finished racks are moved forward from the 12th rack to the 10th rolling mill, reducing the number of 2-4 empty passes of the intermediate rolling unit; the replacement of specifications in the present invention is based on the principle of sharing the pass type, effectively shortening the time for replacing the rolling mill. The downtime for each change of specification is reduced by 84 minutes to 120 minutes; the spare number of rolling mills and rolls is reduced, labor intensity and production costs of workers are reduced; intermediate shifts are reduced, and the finished product shifts are moved forward to the 10th rack of the middle rolling group to produce finished products, so that the rolling mill The layout is more compact, which is conducive to the stable control of rolling tension, improves the control of round steel dimensional accuracy, and effectively improves the quality of round steel.

Description

technical field [0001] The invention belongs to the technical field of round steel production technology, and in particular relates to a rolling process method based on a Ф55 mm to Ф75 mm round steel common pass system. Background technique [0002] The original design products of the company's double bar production line are round steel and rebar. The round steel product design specifications are φ16mm-φ60mm. In order to meet the market demand for steel specifications for tube blanks, three super-design specifications of φ65mm, φ70mm and φ75mm have been independently developed. Hot rolled round steel products. The double-bar production line was completed and put into operation in 2006. In the early stage, it mainly produced rebar, which is a building material product. Since 2015, the product structure has been upgraded and transformed, and the main rebar product has been transformed into hot-rolled round bar. Combined with market demand and process equipment, it is positione...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): B21B1/18
CPCB21B1/18Y02P90/30
Inventor 刘桂华窦玮齐孝楠王会超刘宝超王佩鑫冯治胜王新奎
Owner TIANJIN IRON & STEEL GRP