SU1752459A1 - Metal rolling method - Google Patents

Abstract

Use: Metal forming with the use of lubrication and cooling. The essence of the invention: the metal is deformed by rolling vzkkami, while on the rolls serves coolant-lubricant in the form of an emulsion of oil in water, and on the roll-up - technological lubricant. Before the task of rolling the rolls, a part of the emulsion is sent to it in the amount of 2-10 vol.%.

Description

The invention relates to the processing of metals by pressure, in particular to the technology of lubrication and cooling during cold rolling of a sheet.

There is a method of operation of technological lubricant v, detergents in the manufacture of rolled products, including the application of grease to the tackle and the cleaning of the rolled strip with a degreasing solution.

This method does not provide high performance rolling mill, as it is necessary to periodically stop and clean these tools after rolling. In addition, the constant presence of grease on the tackle causes contamination of the mill equipment, as well as the strip, which degrades its quality.

There is a method of rolling metal, including its deformation by rolling rolls, the supply of coolant-containing liquid in the form of an oil-in-water emulsion onto rolls and technological lubricant on a roll.

The disadvantage of the proposed method is contamination by the lubricant of the mill equipment and the strip, which leads to a deterioration in the quality of rolled products, a decrease in the productivity of the cold rolling mill.

The aim of the invention is to improve the quality of rolled products and increase the productivity of the rolling process.

According to the method of metal rolling, including its deformation by rolling rolls, supplying coolant in the form of an oil-in-water emulsion to rolls and a process roll on a roll, part of the emulsion is sent to rolls on a roll in an amount of 2-10% by volume.

Lubrication on the tackle is served after descaling it before rolling into a roll. For good coiling, as well as to prevent injury to the rolling surface during coiling and subsequent unwinding, the amount of lubricant applied is 2-4 g / m. During the rolling process, this sizing pollutes the surface of the rolled strip, as it is in excess on the surface. . In addition, the lubricant affects the seizure of the front end of the strip at the task of the mill, which affects the performance of the rolling mill.

It is advisable to remove the grease from the surface of the rolled during its rolling to the mill. In addition, reuse remote with rolled

WITH

Yu

lubricants for feeding in the mixture with cooling emulsion to the rolls allows to improve the lubricating properties of the emulsion and thereby increase the productivity of the mill and the quality of the rolled surface.

The method is carried out as follows.

A lubricant is applied to the tackle and rolled up into a roll. After that, the roll set on the decoiler, and set the rolls of the rolling mill and rolled.

The rolls are cooled with emulsion from the circulation system. A part of the emulsion in an amount of vol.% Is directed to the ud / ename of the grease from the roll. Subsequently, the lubricant is mixed with. emulsion, thereby increasing its lubricating properties,

PRI me R 1. Lubrication is applied to styled rolls with a thickness of ho - 4.0 m. 20 s of the amount D 3 g / m2. Then under a sat wound into a roll. Rolling is carried out to a thickness of hi, 0 mm. In this case, an emulsion with a concentration of 0.5% is used to cool the rolls. The required emulsion consumption is Pi 290 m / h. A part of this emulsion in the amount of i 29 m3 / h (10% of its consumption) is fed by the jets of pop-ups with the jets, thereby ensuring the lubrication of the lubricant from its surface.

It was found that, compared with the manufacturing method of example 1, the pollution at the surface of the rolled stock decreased by 30%, and the productivity of the strike increased by 2–5% (3– 350 mg / m2; P –70 i / h).

Lumimeter 2. Emulsol OM lubricant in the amount of 2.7 g / m2 is applied to the tackle from steel 20 with a thickness of ho - 3.5 mm, and then wind it into a roll. Post this roll is installed on the chassis, set in g, alki continuously 1 four-quarter-mill mill 2500 and rolled to a thickness of 1.5 mm. Cooling Parameters C 3.2%; emulsion consumption for cooling rolls Pi 900 m / h. A part of this emulsion in an amount of Pa of 18 m3 / h, which is equal to 2% of its consumption, is jetted to the bed, thereby removing the lubricant from its surface. After that, the mixture is drained into the circulating cooling system.

In example 2, the contamination of the rolling surface is reduced by 25%, and the mill productivity increased by 1.7%. A positive effect was achieved when

maintaining the flow rate of the emulsion supplied to remove the lubricant from the roll at the lower permissible limit,

Example 3. The method was carried out analogously to example 2. The lubrication parameters

0 and cooling: D 4 g / m2, С 3 5%, PI 950 M3 / h, P2 - 57 m3 / h (V% by volume from PI). When maintaining PZ at the medium level, the famous positive effect was also achieved. Contamination decreased by 32%, and

5 mill productivity increased by 1.8%

Example 4. The method was carried out analogously to example 1. Parameters of cooling lubricant: D — 2.5 g / m2; C - 0.9%; PI

0 - 306 m3 / h, P2 5.5 m3 / h (1.8% by volume from Pi). The contamination of the rolling surface was 3 mg / m2; the productivity of P — 68 t / h, which reduces the level of the known method. While maintaining consumption

5 0 at a level below the lower limit value, the positive effect is not reached. The emulsion applied to the tackle was not enough to remove the lubricant. EXAMPLE 5 The method was carried out

0 is analogous to example 1. Lubrication and cooling parameters: D 3 g / m2; C 0.6%, Pi -310 ml / h, P2 - 32 MJ / “(10.3% by volume of PI). A half-hourly consumption of P2 at a level above the upper limit value ensures a positive effect. The contamination of the rolling surface remained at the level of the known method, and the mill's productivity decreased by 2%. The positive effect was not achieved.

0 The technical and economic advantage of the proposed method in comparison with the known method is to improve the quality of rolled products and increase the productivity of the rolling process.

Claims (1)

5 claims The method of rolling metal, including its deformation by rolling rolls, the supply of coolant in the form of an emulsion of oil in water on the rolls and 0 technological lubricant for rolling, characterized in that, in order to improve the quality of rolling and increase the production of the rolling process, before the task of rolling in, a part of it is fed to it. 5 emulsions in an amount of 2-10% by volume.