CN201183064Y - A device for preventing edge cracking of strip steel in a hot continuous rolling mill - Google Patents

Abstract

The utility model relates to a device for preventing edge cracks of strip steel in a hot continuous rolling mill. Hot rolling oil nozzles are installed on both sides of the roll body. When the strip is running in the rolling mill, the hot rolling oil and water are sprayed onto the surface of the guide wheel exposed outside the guide plate. surface. The method of the utility model has a simple structure, can effectively avoid edge cracks caused by scraping the edge of the strip steel against the guide plate during the rolling process, and at the same time reduce wear of the guide wheel and prolong the service life of the guide wheel.

Description

A device for preventing edge cracking of strip steel in a hot continuous rolling mill

technical field

The utility model relates to the production field of hot-rolled strips, in particular to a device for preventing edge cracks of strip steel in a hot continuous rolling mill.

Background technique

The main reason for side cracks in the production of silicon steel by hot rolling is that when the intermediate billet enters the finishing rolling unit for rolling, the edge of the strip scrapes against the guide plate, wax hangs on the guide plate and foreign objects fall off, resulting in tearing of the edge of the steel coil Create a crack. Some domestic steel mills use guide wheel devices to prevent edge cracks in silicon steel, but the effect is not ideal, and the edge crack rate is still high.

Utility model content

The utility model overcomes the deficiencies in the prior art, and aims to provide a device for preventing edge cracks of strip steel in a hot continuous rolling mill. The friction between the head and the guide wheel can effectively reduce the edge cracking rate of silicon steel.

In order to solve the above problems, the utility model adopts the following technical solutions:

A device for preventing edge cracks of strip steel in a hot continuous rolling mill, characterized in that guide wheel devices are respectively installed on the transmission side and the working side at the junction of the bell mouth of the guide plate and the channel of the guide plate.

Install hot rolling oil nozzles on both sides of the roller body of the guide wheel device. The diameter of the guide wheel device is 240mm, the length of the wheel body is 400mm, and the opening between the two guide wheels is 20-30mm smaller than the opening of the guide plate.

Compared with the prior art, the beneficial effects of the utility model are:

1. Install a guide wheel device on the transmission side and the working side at the junction of the bell mouth and the plate channel of the guide plate at the entrance of each rolling mill of the hot-rolling finishing unit, and the opening between the two guide wheels is smaller than the opening of the guide plate. Therefore, when the strip is running in the rolling mill, the edge is in contact with the passively rotating guide wheel, and will not scrape against both sides of the guide plate, which greatly reduces the incidence of edge cracking of silicon steel.

2. The nozzle device is installed near the guide wheel device, and the lubricating oil can be sprayed when the strip steel is running, which reduces the friction between the guide wheel and the edge of the strip steel, reduces the wear of the guide wheel, improves the surface quality of the guide wheel, and prolongs the replacement of the guide wheel The cycle also plays the role of cooling the guide wheel.

3. Using the original hot-rolled oil pipeline to lead out the hot-rolled oil pipeline of the guide wheel device, the method is simple and saves energy.

Description of drawings

Fig. 1 is the front view of the utility model

Figure 2 is a top view of the utility model

In the figure: 1. Guide plate 2. Guide wheel device 3. Nozzle

Detailed ways

When producing silicon steel by hot rolling, after the strip steel enters the finish rolling unit, the edge scrapes against the two sides of the guide plate 1 at the entrance of the rolling mill. Due to the soft steel, the edge of the strip steel is cracked, or foreign matter falls on the surface of the steel plate, resulting in Foreign matter pressed in. In order to solve the above problems, the utility model takes the following scheme:

① At the junction of the bell mouth of the guide plate 1 and the plate channel, a guide wheel device 2 is installed on the transmission side and the working side respectively. The diameter of the guide wheel device 2 is 240mm, the length of the wheel body is 400mm, and the opening between the two guide wheels is smaller than that of the guide plate. 1 The opening degree is 20-30mm, so that when the intermediate billet enters the finishing rolling mill, the edge of the strip will be in contact with the guide wheel, so as to avoid contact with the two sides of the guide plate 1.

② Install hot-rolling oil nozzles 3 on both sides of the roll body of the guide wheel device, and its pipeline communicates with the hot-rolling oil pipeline of the work roll of the finishing mill.

③ When the strip is running in the rolling mill, the hot rolling oil and water are sprayed to the surface of the guide wheel exposed outside the guide plate 1, and when the guide wheel is passively rotated, the hot rolling oil is sprayed to the guide wheel together with the water The entire surface not only reduces the friction between the edge of the strip and the surface of the guide wheel, reduces the wear of the guide wheel, but also plays a role in cooling the guide wheel.

Claims (3)

1. A device for preventing edge cracking of strip steel in a hot continuous rolling mill, characterized in that: guide wheel devices are respectively installed on the transmission side and the working side at the junction of the bell mouth of the guide plate and the channel of the guide plate. 2. A device for preventing edge cracks of strip steel in a hot continuous rolling mill according to claim 1, characterized in that hot rolling oil nozzles are installed on both sides of the roll body of the guide wheel device. 3. A device for preventing edge cracks in a hot strip mill according to claim 1, characterized in that: the diameter of the guide wheel device is 240 mm, the length of the wheel body is 400 mm, and the opening between the two guide wheels is less than The opening of the guide plate is 20-30mm.

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