JPH0315202Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an axle box for a rolling mill that employs a double chock bending method.

The thickness distribution of the rolled material in the width direction is uneven due to the heat distribution of the rolls, elastic deformation, etc.
In recent years, rolling mills are required to have the ability to arbitrarily control the thickness distribution in the width direction.

Currently, the roll bending method is the most common method for controlling the shape of plate thickness distribution, but since the span of the bending curve obtained by normal roll bending is constant, the bending curve becomes monotonous, and the work roll As the plate width of the rolled material becomes narrower than the pressing surface width, the bending effect decreases.

For this reason, a double chock bending method is adopted in which both ends of the roll are supported by two axle boxes for bending, and a wide variety of bending curves are used to achieve good sheet thickness from wide to narrow. Distribution control is becoming possible.

However, in such a double chock bending type rolling mill, when changing the rolls, as shown in Fig. 1, the inner and outer shaft boxes a and b at both ends are fixed together with bolts c and taken out from the housing d. After assembling another roll into the housing, the bolts c had to be removed again, and these operations required a great deal of labor and were tedious because they were performed manually.

The present invention aims to eliminate the drawbacks of the axle box of the conventional double chock bending type rolling mill mentioned above, and has a recess in the inner axle box that has a U-shaped horizontal cross section and is wide enough to be accommodated in the housing. The outer shaft box is fitted through a groove or protrusion extending in a direction perpendicular to the axial direction of the roll so as to restrict movement in the axial direction and allow movement in the vertical direction along the groove or protrusion. This is an axle box for a rolling mill that integrates the rolls and the left and right inner and outer axle boxes by being tightly housed, and allows the rolls to be taken in and out of the housing as they are, making it easy to rearrange the rolls.

Embodiments of the present invention will be described below based on the drawings.

FIG. 2 shows an embodiment of the present invention, in which the inner shaft box 2, which rotatably supports both ends of the roll 1, has a U-shaped horizontal cross section and a width that allows it to be accommodated in the housing 4. Each inner shaft box 2 is fitted onto the roll 1 so that the open side thereof faces toward both ends of the roll 1, and
The outer axle boxes 3 are housed in the recesses 6 of each of the inner axle boxes 2, and the inner protrusion 8 of the presser frame 7, which extends through each of the inner axle boxes 2 so as to be slidable from the horizontal direction, is inserted into each of the outer axle boxes. The shaft boxes 3 are fitted into locking grooves 9 provided on both sides of the outer shaft boxes 3 with some play, and each outer shaft box 3 is fixed with bolts 10 in a semi-fixed state. Further, the outer protrusion 11 of each presser frame 7 can be fixed to the housing 4 with a bolt 13 using a fixing member 12. Although not shown, the inner shaft box 2
The outer shaft box 3 is equipped with devices necessary for performing roll bending control, such as a bending cylinder.

With the above configuration, the outer axle box 3 is housed in a semi-fixed state within each inner axle box 2, so that
By removing the fixing members 12 that fix the outer protrusions 11 of the presser frame 7, the roll 1 and the left and right inner and outer axle boxes 2 and 3 can be pulled out as a unit. Further, when each outer shaft box 3 of the roll 1 is to be removed, it can be easily removed by removing the bolts 10 and moving the presser frame 7 outward.

Next, when installing the roll 1, after the roll 1 and the axle boxes 2 and 3 are integrated into the housing 4, the outer protrusion 11 of the presser frame 7 is fixed with the bolt 13 using the fixing member 12.

Through the above operations, the roll 1 can be easily rearranged.

FIG. 3 shows another embodiment of the present invention, in which the inner axle box 2' has a U-shaped horizontal cross section and the housing 4
The inner axle box 2' has a width such that it can be stored in the recess 6, and vertical grooves 14 are provided on the opposing surfaces of the recess 6 of the inner axle box 2'.
It is stored inside. The groove 14 is formed in the outer axle box 3'.
As shown in FIG. 4, the fitting portion is rounded to prevent abrasion such as galling due to displacement of the axle boxes 2', 3' during roll bending control.

Furthermore, projections 15 are provided on both outer sides of the inner axle box 2', and are secured to the housing 4 with bolts 13 using fixing members 12. In FIG. 3, the same reference numerals as in FIG. 2 indicate the same parts.

With the above structure, either the inner shaft box 2' and the outer shaft box 3' assembled integrally are fitted to both ends of the roll 1, or the inner shaft box 2 is first fitted halfway. Next, the outer axle box 3' is dropped from above using the groove 14 as a guide and fitted onto the roll 1, and the roll 1 and the left and right inner and outer axle boxes 2', 3' are put in and out of the housing 4 in an integrated state. It is possible,
Also, the protrusion 1 of the inner axle box 2' attached to the housing 4
5 can be easily fixed with the fixing member 12.

Note that the axle box of the rolling mill of the present invention is not limited to the above-mentioned embodiment, and the protrusion on the frame of the inner axle box shown in the other embodiment (Fig. 3) can be removed to allow roll shifting. The gist of the present invention is to enable the roll and the left and right inner and outer shaft boxes to be moved in and out of the housing as a unit, and to be able to move in the roll axis direction within the housing while being integrated. Of course, various changes can be made within the scope.

As described above, according to the rolling mill axle box of the present invention, the outer axle box is removably housed within the inner axle box, so that the rolls and the left and right inner and outer axle boxes can be taken in and out of the housing as one unit. This greatly reduces the work required to rearrange the rolls and improves the operating rate.In addition, by moving the outer shaft box relative to the inner shaft box in the vertical direction, the rolls can be easily bent with a small force. Various excellent effects can be achieved.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram of an axle box of a conventional double choke bending rolling mill, Fig. 2 is an explanatory diagram of one embodiment of an axle box of the present invention, and Fig. 3 is an explanatory diagram of another embodiment of an axle box of the present invention. An explanatory diagram of an example, FIG. 4 is a detailed explanatory diagram of the outer axle box in FIG. 3. 2 and 2' are inner axle boxes, 3 and 3' are outer axle boxes, 7 is a holding frame, 9 is a locking groove, 14 is a groove, and 15 is a protrusion.

Claims (1)

[Scope of utility model registration request] The outer shaft box is inserted into the recessed part of the inner shaft box, which has a U-shaped horizontal cross section and a width that can be accommodated in the housing, through a groove or protrusion extending in a direction perpendicular to the axial direction of the roll. 1. An axle box for a rolling mill, characterized in that the axle box for a rolling mill is fitted and housed so as to restrict directional movement and allow vertical movement along a groove or a protrusion.