JPS5954445A - Rotary cooling roll of production device for thin metallic sheet - Google Patents

Abstract

PURPOSE:To provide a titled rotary cooling roll which makes the thermal displacement in the width direction of a cooling ring uniform, to eliminate the uneven thickness of a sheet by making the pitch of the water passage groove of said ring increasingly larger toward both ends. CONSTITUTION:A rotary cooling roll of a production device of a thin metallic sheet has a cooling ring 1 shrinkage-fitted onto a backup ring 2 and brings said ring into contact with a thin steel sheet at the cooling effect which is decreased relatively by the increasing larger pitches P0-P4 of the passage grooves 3 of said ring from the central part of the ring width toward both ends. Such constitution of the rotary cooling roll contributes to the constant displacement of the ring 1 owing to its thermal expansion and the production of a thin metallic sheet having a uniform thickness.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a sheet metal manufacturing apparatus, and particularly to a cooling structure for a rotating cooling roll.

[Prior art]

, 6. Cooling of conventional rotary cooling rolls used in equipment for directly producing thin sheet metal from molten metal, l! The # structure is shown in Figure 1b1.

IJII, outer cooling ring (ca)! and the inner backup ring (BR) 2 are assembled by shrink fitting, and C
Water passage grooves 3 through which cooling water passes are provided in the circumferential direction at equal pitches (p,) in the [1] direction on the back surface of the IO.

When manufacturing thin sheet metal IO by pouring molten metal through nozzle 4 using this structure, the temperature distribution (T) in the width direction and the CR thermal displacement (δ) based on it are as shown in Figure 2. state p(,
1 is different in the width direction, and as a result, the center part of the CR has a crown whose thermal displacement is larger than the end part, and the nozzle-roll gap (G) is -pef in the 113 direction.
Yes, the 194J is 11 sheet metal (・4 plate thickness (1) φ
This results in non-uniformity in the frlJ direction, which causes problems with the (l material) retention and finishing, so there is a strong demand for improvement.

[Purpose of the invention]

The purpose of the present invention is to improve the arrangement of the cooling ring water passages i'M and to make the thermal displacement in the ring width direction uniform. There is a rotating cooling roll on the screen.

[Value of invention]

The key point of the present invention is that the arrangement pitch t of the water passage grooves on the back surface of the cooling ring is
By increasing the IJ ring to 21'- from the center toward both ends in the +l> direction and changing the cooling effect, the thermal displacement in the force direction of the ring "1" can be made equal to -. .

[Embodiments of the invention]

Embodiments of the present invention will be described below with reference to FIGS. 3 to 5. Figure 3 is a vertical cross-sectional view of the rotary cooling (J-AI), showing the cooling ring (CfL) i and the
111'L) 2 by shrink fitting, and a rotary cooling roll 11 composed of these, a plate 5, and a shaft 6 is supported by bearings 7. Cooling ring 1 is 1ull melted! It cools metals and sheet metals by contacting them,
The heat dissipation is stronger than the cooling water of 7゛1 on the back than the cooling water of 3! ! 'i
LJ? 'If you give up, you will be called out.'

εlI cooling water is supplied and discharged via the shaft 6, plate 5, and nozzle 2, but detailed description will be omitted.

Now, the water passage grooves 3 of the cooling ring 1 are arranged at a pitch of P7 as shown in Fig.
The dimension (L) of is increased sequentially in higher orders, and relatively? 1
↑Considerations have been taken to reduce the rejection effect. Book 111γ
As shown in Figure 5, the cooling ring's surface 11.gap (1,') and thermal expansion displacement (δ) are uniform over the entire surface in the 11J direction.
Therefore, the molten metal 'i4 i 1 (the gap between the 4S nozzle 4 and the cooling ring 1 ((1) and the thin sheet metal 1.
The three plates (1) are uniform and allow for the production and processing of thin sheet metal of good quality.

The above is an example of an actual sword, and is part of the present invention. ψ吋It doesn't stop there. For example, if W is large, the water passage 1'11 pitch P can be made gradually larger only in the part near the ring hole, and the central section can be made substantially the same pitch P. In the figure ~■o is a thin sheet metal "[].

〔Effect of the invention〕

According to this invention, the thermal expansion displacement in the 11J direction of the cooling ring formed by the 4 rotary cooling rolls 11q is constant, and a thin metal sheet of uniform thickness can be manufactured.

[Brief explanation of the drawing]

Figure 1 is a cross-sectional view of a conventional rotary cooling roll, and Figure 2 is a cross-sectional view of a conventional rotary cooling roll.
Figure 3 is a cross-sectional view of a rotary cooling roll according to an embodiment of the present invention, Figure 4 is a diagram showing the relationship between water passage groove pitches, and Figure 5 υ: according to this embodiment. Roll's ;'?
! In the figure of L, a, ・place pu・chiru. 1...Cooling ring, 2...Backup ring, 3
...Water channel, ■). + PI J +? 21 P3
r P4... Water groove pitch. Agent: Patent Attorney Akio Takahashi”. 2

Claims (1)

[Claims] 1. When the cooling ring and the backup ring are assembled by shrink fitting, and water passage grooves are provided in the circumferential direction on the back surface of the cooling ring, the pitch of the water passage grooves is adjusted in the width direction of the cooling ring. A thin sheet metal sheet metal (1-L) that is characterized by increasing its size as it goes up the center and toward both ends.