JPS5941807B2 - Roll for transferring hot metal pieces - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a roll for transferring hot metal pieces.

This type of roll is used under conditions in which hot metal pieces heated to 700 to 1100°C repeatedly come into contact with each other, and in some cases, the hot metal pieces temporarily stop. There is a considerable temperature difference between the side where the piece is in contact and the opposite side, resulting in a different amount of expansion, which causes the problem that the entire roll is severely bent and becomes unusable.

In recent years, sleeved rolls in which the outer periphery of the roll shaft is covered with a sleeve made of heat-resistant steel or the like have been used, but even with this sleeved roll, the above-mentioned problems have not yet been solved. The present invention aims to provide a roll that solves the above-mentioned problems.The gist of the invention is to provide a roll in which the outer periphery of the roll shaft is covered with a plurality of split sleeves, and one end of the roll shaft is provided with a sleeve to prevent the split sleeves from coming off. Each divided sleeve has a wavy or diagonal side adjacent to the adjacent sleeve, and a slight gap is provided between the sleeves, and the roll axis and other parts This roll for transferring hot metal pieces is characterized in that only the divided sleeves located at the ends are fixed to the roll shaft.

The present invention will be described in detail below with reference to the drawings. The outer periphery of the roll shaft 1 is covered with divided sleeves 2, 2, . A split sleeve slip-out prevention member 3 is protrudingly provided at one end of the roll shaft, and a plurality of split sleeves 2, 2, . . . Only the split sleeve 2 located at the other end is fixed to the roll shaft 1 and is configured so as not to rotate or pull out, and the remaining split sleeve 2
is slidable in the axial direction of the roll shaft 1 within a gap provided between adjacent split sleeves.

Here, the member 3 for preventing the split sleeve from coming off, which is provided protrudingly from one end of the roll shaft 1, is attached to the roll shaft 1 as shown in FIG. 1, for example.
A type with a flange-like step protruding from one end, or a similar ring-shaped member prepared to be detachable from the roll shaft 1 and fixed with a pin or other means, or a second type. As shown in Figures 1 and 3, a required number of protrusions are attached to one end of the roll shaft 1 either integrally with the roll shaft 1 or detachably.

The sleeve 2 at the other end is usually fixed to the roll shaft 1 by welding. The above-mentioned provision of a slight gap between the adjacent sleeves and the same soil means that there is a certain gap at room temperature, and the width is just enough to fill the gap when the sleeve expands to its full capacity when heated. This is to leave a gap between the two, and you should avoid leaving a gap larger than necessary. In addition, the shape of the side portion of each sleeve of this invention, that is, “wavy”,
[Oblique shape] can be considered in addition to what is shown in Figs. 1 and 2, and the key point is to have a shape that prevents the sleeve that is not fixed to the roll shaft from rotating around the roll shaft 1, and as much as possible. There is no problem as long as there are no acute angles, and an example is shown in FIG. If the roll is to be sprayed with external cooling water, it is desirable that the roll shaft be made of a corrosion-resistant material and that its surface be overlaid with a corrosion-resistant material.

In this invention, a plurality of divided sleeves are placed over the outer periphery of the roll shaft with a slight gap between them at room temperature. A retaining member is provided, and the split sleeve located at the other end of the roll is fixed to the roll shaft, so when used for hot metal transfer, multiple sleeves can transfer hot metal without rotating around the roll shaft. The pieces can be transferred, and the unfixed split sleeves can freely slide in the longitudinal direction of the roll shaft within the gap between the sleeves, so in the unlikely event that only one side of the roll is heated, the amount of expansion on both sides of the roll will be reduced. Even if the values are different, this is compensated for by the movement of the unfixed split sleeve, and there is no disadvantage that the entire roll bends.

Furthermore, since the split sleeve has a wavy or oblique shape as described above, the gap formed on the outer peripheral surface of the roll also has a wavy or oblique shape. Since the direction of the stress in the circumferential direction is misaligned with the direction of the gap, the stress in the circumferential direction that could lead to breakage of the roll shaft is dispersed and the life of the roll is improved.

Furthermore, since the gap is wavy or oblique, when the split sleeve slides in the axial direction of the roll due to expansion, the gap may be narrower than when the gap is perpendicular for the same amount of sliding. This means that only a small number of scars are left on the hot metal piece being transferred, and since the gaps are not perpendicular, the scars do not occur in the same continuous location, so there is less damage to the transferred material. effective.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway perspective view of the roll for transferring hot metal pieces of the present invention, with a wavy sleeve, Fig. 2 is a partially cutaway perspective view of the same diagonal sleeve, and Fig. 3 is a partial cutaway perspective view of the same diagonal sleeve. FIG. 4 is an explanatory view showing various shapes of the sleeve side portion.

Claims (1)

[Claims] 1 A roll with a plurality of divided sleeves covering the outer periphery of the roll shaft, a member for preventing the sleeves from falling off is protruded from one end of the roll shaft, and each divided sleeve has a wavy side on the side adjacent to the adjacent sleeve. Or, the sleeves have a diagonal shape and there is a slight gap between the sleeves,
Moreover, the roll for transferring hot metal pieces is characterized in that only the split sleeve located at the other end of the roll shaft is fixed to the roll shaft.