SU1348020A1 - Method of assembling composite rolling mill roll - Google Patents

Abstract

The invention relates to rolling production and can be used in the manufacture of rolling rolls for creating and separating shaped profiles. The aim of the proposed method is to reduce the laboriousness of assembling the composite mill roll and increase the reliability of the design. The proposed method includes the following operations: making a groove in the roll body with a dovetail undercut, manufacturing and heating the insert to a temperature of plastic deformation from a wear-resistant material having a rectangular cross-section and a length shorter than the roll barrel, sequential altitudinal deformation of the insert to the full filling of the groove , docking the ends and increasing the length of the insert to 1.02-1.08 of the length of the roll barrel, welding the ends of the insert and shaping the desired shape. 3 il. (L

Description

one

The invention relates to ferrous metallurgy, more specifically to rolling production, and can be used in the manufacture of profiles, as well as in the separation of shaped profiles.

The aim of the invention is to reduce the labor intensity and increase the reliability of the structure.

Figure 1 shows schematically the initial assembly stage of the composite roll, the front end of the rectangular band in figure 2 is placed in the annular groove of the roll housing in figure 2 - the composite roll at the final assembly stage; as a result of plastic deformation, the bandage material completely filled the ring groove with excessive elongation of the bandage and its ends are connected by a welded seam; the cross section in FIG. 3 — handles of the composite shaft

ka after calibration is fixed in this method bandages.

The scheme for the implementation of the proposed method includes the following designations: 1 — roll, 2 — insert, 3 — weld.

Making a roll includes the following operations: making a groove of a certain size, making and heating to the temperature of plastic deformation of the insert from wear-resistant material, sequential deformation of the insert in the body of the roll until the slot is completely filled, welding the ends of the insert and shaping the roll to the desired shape.

When implementing the method, in the body of the roll 1, a groove with an undercut is made into which an insert 2 is inserted, heated to the temperature of plastic deformation. The insert has a rectangular cross section and a length shorter than the length of the roll barrel. After the front end of the insert is installed in the groove, the roller begins to rotate around the horizontal axis and at the same time deform the insert in height by 5-15%. Such deformation leads to the widening of the insert, which ensures its fixation in the annular groove of the roll. After that, the insert is continued to be deformed successively until the groove is completely filled and the stretching is provided, which ensures an increase in the insert length to 1.02-1.08 of the length of the roll barrel. When the insert and the roll have cooled, the ends of the insert are welded and give the roll the desired shape.

thirty

35

50 3D80202

mu Reliable fastening of the insert in the roll body is provided by the configuration of the groove and compressive stresses that occur when the strip is deformed in height after docking the ends — due to excessive elongation of the insert, the necessary tension is created.

10 through the insert and, consequently, apply the rolls made according to the proposed method on the section mills in the production and separation of shaped profiles.

15 Example. In a roll casing with a diameter of 900 mm, made of steel grade 50, an annular groove is cut through with a swallow-tail section of 16 mm depth and a minimum width of 20.5 mm. The lateral edge side of the groove is 2, the front end of the rectangular a bandage made of steel 9XC and having dimensions of 18x20x932.5 mm, after heating to a temperature of 1100 ° C, the slug 25 is inserted into the groove. Then the bandage is deformed in height, while simultaneously turning the roll body around the longitudinal axis. When deformed by 10% of the initial height, the bandage is self-wedging, its bending around the roll circumference and its ends are joined. After that, deformation is performed at 6% of the initial height, as a result of which the material of the band completely fills the groove and due to its excessive elongation of 1.05 times the circumference of the roll, the required tension is created. Then, after cooling the bandage, weld

ku its ends whoses.

and a pair of required ru

Claims (1)

Invention Formula The method of assembling the composite mill roll, including the installation of a carbide band in the annular groove of the roll body, their connection and subsequent calibration of the band, is made so that, in order to reduce the labor intensity and increase the reliability of the design, the annular groove A dovetail-type cross-section is performed, and the bandage is in the form of an open element of rectangular cross-section with a length shorter than the length of the corpus roll, and the bandage is connected to the roll body by plastically deforming on 1348020 heated bandage until complete filling 1.02-1.08 of the roll circumference. the groove and the elongation of the bandage to the value after which the ends of the bandage are welded after which the ends of the bandage are welded. FIG. fig.Z