A hydraulic pressing device for cold rolling mill

Abstract

The present invention discloses a hydraulic screw-down device for a cold rolling mill, comprising a flanged hydraulic cylinder mounted on the upper crossbeam of an archway and connected to the archway via an upper flange and a lower flange. Studs are installed between the upper and lower flanges and the archway, and are fixed together using a shrink-fit method. The cylinder body of the flanged hydraulic cylinder is fastened to the upper flange via studs. A plunger is mounted within the cylinder barrel of the hydraulic cylinder, with its top end connected to a piston and its bottom end inserted into the inner hole of the lower flange. A sliding sleeve is installed between the plunger and the inner wall of the lower flange. An MTS magnetostrictive displacement sensor is installed within the flanged hydraulic cylinder. This invention can increase the control distance of the hydraulic cylinder and enhance the stability of the hydraulic screw-down device.

Description

Technical Field

[0001] The present invention relates to the technical field of metal processing, in particular to a hydraulic pressing device for a cold rolling mill. Background Art

[0002] Rolling mills are widely used for rolling metals. In the process of manufacturing steel strips, on the one hand, there are certain requirements for the length and thickness of the steel strips, among which the rolling mill can automatically cut the steel strips when the length of the steel strips reaches a predetermined value. As for the thickness of the steel strips, it is necessary to use a pressing device to press the continuous casting billets. In the prior art, there are two main types of equipment used to press steel billets, one of which is electric pressing equipment, and the other is hydraulic pressing equipment such as hydraulic cylinders. The electric pressing device in the prior art is a motor that transmits motion through a gear reducer, and is mostly used in primary rolling mills and hot and cold strip rolling mills; the moving distance and pressing capacity are large, but the structure is complex, the response time is long, and the efficiency is low. The traditional hydraulic pressing device uses a hydraulic suspension cylinder to suspend the hydraulic cylinder between the support roller bearing seat and the upper crossbeam of the archway, and the control stroke is limited. Summary of the Invention

[0003] In order to solve the above problems, the purpose of the present invention is to provide a hydraulic pressing device for a cold rolling mill with a simple structure and high adjustment accuracy.

[0004] In order to achieve the above-mentioned object of the invention, the present invention adopts the following technical solutions:

[0005] A hydraulic press-down device for a cold rolling mill includes a flange-type hydraulic cylinder, which is installed on the upper part of the upper crossbeam of an archway and is connected to the archway through an upper flange and a lower flange. Studs are installed between the upper flange, the lower flange and the archway and are fixed together by thermal installation. The cylinder body of the flange-type hydraulic cylinder is connected and fastened to the upper flange by studs. The plunger is installed in the cylinder barrel of the hydraulic cylinder, with the top end connected to the piston and the bottom end passing through the inner hole of the lower flange. A sliding sleeve is installed between the plunger and the inner wall of the lower flange. An MTS magnetostrictive displacement sensor is installed in the flange-type hydraulic cylinder.

[0006] Due to the adoption of the above technical solution, the present invention has the following advantages:

[0007] The hydraulic hold-down device for a cold rolling mill has a simple structure, stable operation, fast response speed, and high adjustment accuracy. It is installed on the upper part of the upper crossbeam of the archway, which reduces the installation difficulty and increases the control distance of the hydraulic cylinder. The use of a thermally mounted stud fixed flange connection structure enhances the stability of the hydraulic hold-down device and has good promotion and application value. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1It is a structural schematic diagram of a hydraulic screw-down device for a cold rolling mill according to the present invention;

[0009] In the figure: 1 - flange type hydraulic cylinder; 2 - upper flange; 3 (3a, 3b) - stud; 4 - plunger; 5 - sliding sleeve; 6 - lower flange; 7 - archway; 8 - transition block; 9 - bearing seat; 10 - upper roller. DETAILED DESCRIPTION

[0010] The technical solution of the present invention is further described in detail below with reference to the accompanying drawings and embodiments.

[0011] like Figure 1 As shown, the hydraulic pressing device for the cold rolling mill includes a flange-type hydraulic cylinder 1, which is installed on the upper part of the upper crossbeam of the arch 7 and is connected to the arch through the upper flange 2 and the lower flange 6. Studs 3a are installed between the upper flange 2, the lower flange 6 and the arch and are fixed together by heat-fitting. The cylinder body of the flange-type hydraulic cylinder is connected and fastened to the upper flange through studs 3b. The plunger 4 is installed in the cylinder barrel of the hydraulic cylinder, the top end is connected to the piston, the bottom end is passed through the inner hole of the lower flange 6, and a sliding sleeve 5 is installed between the inner wall of the lower flange. An MTS magnetostrictive displacement sensor is installed in the flange-type hydraulic cylinder to detect the stroke of the hydraulic cylinder.

[0012] The piston drives the plunger 4 to move up and down, so that the bottom end of the plunger directly acts on the transition block 8 on the surface of the bearing seat 9 of the upper roller, thereby pressing the upper roller 10 downward.

[0013] The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention. Without departing from the spirit and scope of the present invention, all equivalent changes and modifications made within the scope of the patent application of the present invention shall fall within the scope of patent protection of the present invention.

Claims

1. A hydraulic screw-down device for a cold rolling mill, characterized by: It includes a flange-type hydraulic cylinder, which is installed on the upper part of the upper crossbeam of the archway and is connected to the archway through an upper flange and a lower flange. Studs are installed between the upper flange, the lower flange and the archway and are fixed together by heat installation. The cylinder body of the flange-type hydraulic cylinder is fastened to the upper flange through studs. The plunger is installed in the cylinder barrel of the flange-type hydraulic cylinder, the top end is connected to the piston, and the bottom is passed through the inner hole of the lower flange. A sliding sleeve is installed between the plunger and the inner wall of the lower flange. An MTS magnetostrictive displacement sensor is installed in the flange-type hydraulic cylinder. The piston is used to drive the plunger to move up and down, so that the bottom end of the plunger directly acts on the transition block on the surface of the bearing seat of the upper roller, thereby realizing downward pressure of the upper roller.

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