JPS62192241A - Direct production for thin metallic plate from casting slab - Google Patents

Abstract

PURPOSE:To reduce equipping cost by arranging a vibrated forging equipment in a continuous casting equipment line or on its extending line and also forging- reducting continuously a casting slab as adjustable to a number of vibration and an amplitude for forging tools. CONSTITUTION:The vibrated forging machine 4 is arranged in a run-out like for the casting slab of the continuous caster 1 and also pinch rolls 3 to give reduction force on the casting slab, are arranged at the front of the forging machine 4. Further, nozzle devices 5, 6 are arranged at each of the inlet and outlet sides of the forging machine 4. The forging machine 4 has pair of the forging tools provided tapered part with angle alpha and flat part, and each tool executes to forge under synchronizing mutually and adjustable to the amplitude (a) and the number of frequency, and then width and thickness of the products are controlled freely. In this way, as the strip metal is produced from the casting slab by the simple vibrated forging machine 4, the equipping cost is reduced remarkably.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a method for manufacturing a metal sheet by directly processing a metal slab manufactured by a continuous casting method subsequent to casting.

[Conventional technology]

If metal slabs obtained by continuous casting of molten metal are processed directly at high temperature without cooling them down to room temperature, the energy required to heat the material for processing can be saved or omitted, reducing energy consumption. It becomes a manufacturing process for fewer and better metal products. A method of directly processing a slab following the casting process to obtain a product is described, for example, in JP-A-54-
153750, which describes a process in which continuously cast metal slabs are sent to a hot rolling facility consisting of eight rolling mills at high temperatures and rolled without being reheated. It is shown. Furthermore, in order to carry out in-line processing following the continuous casting process, it is desirable that the processing equipment be compact;
Publication No. 166106 discloses that the work rolls of the hot rolling mill are made into an 8-layer rolling mill with a special structure to reduce the rolling load and to reduce the rolling load. A method is shown in which the temperature can be controlled and the product can be obtained by applying strong pressure with a small number of stands. In addition, as a method for adjusting the width in a continuous casting line, Japanese Patent Application Laid-Open No. 57-106409 describes a method in which a width reduction rolling mill is placed at the rear of the continuous casting machine and connected to a normal hot rolling mill. Japanese Patent No. 56-77007 discloses a method in which a pair of planetary mills are placed in a continuous casting line to perform thickness reduction and tenter rolling.

[Problem that the invention seeks to solve]

In order to directly process slabs at low equipment costs, it is necessary to minimize or reduce the number of processing equipment (for example, rolling mills) used, that is, processing equipment capable of high pressure reduction is required.

When using a rolling mill, reducing the work roll diameter reduces the rolling load and enables high rolling reduction, but this requires various structural measures.
Publication No. 0-166106 or JP-A-57-1064
This is a special rolling mill as disclosed in Japanese Patent No. 09. Furthermore, since rolling is carried out continuously at high temperatures for a long period of time, the surface of the roll becomes rough and the surface quality of the product deteriorates. Furthermore, since the casting machine and the rolling mill are directly connected, it is practically difficult to replace the work rolls during casting, and some countermeasure is required.

In the method using a rolling mill as in the above-mentioned conventional technology, the equipment becomes huge (height, number of machines, etc.) and is not suitable for in-line installation. Furthermore, if width reduction and thickness reduction are carried out separately, the number of equipment will further increase. The present invention easily solves these problems with low equipment costs. In other words, by using a forging method instead of rolling, the equipment can be made more compact, and by supplying lubricant to the machining part while the forging tool is periodically separated from the workpiece, the tool can be protected and the machining load can be reduced. Therefore, it is possible to reduce the pressure to the desired thickness with a single forging machine, and furthermore, by controlling the frequency and amplitude of the forging tool, the stress in the advancing direction that acts on the slab during forging can be changed. , which attempts to simultaneously control the product width as well as the thickness reduction.

[Failure to solve the problem]

The present invention provides: (1) a vibration forging device equipped with vibrating forging tools that are arranged so that the gap gradually decreases along the direction of material movement, facing each other in the plate thickness direction with a slab in between; A method for directly manufacturing thin metal sheets from cast slabs, which is characterized by being installed in continuous metal casting equipment (line) or on an extension line thereof, and continuously reducing and forging slabs. (2) A vibratory forging device equipped with forging tools that vibrate and are configured so that the gap gradually decreases along the material movement direction, facing each other in the plate thickness direction with the slab in between, is used to produce molten metal. It is installed within the continuous casting equipment (line) or on its extension line, and continuously reduces and forges the slab, and while the forging tool is away from the slab, which occurs depending on the vibration frequency, the lubricant is removed. This is a method for directly manufacturing a thin metal plate from a slab, characterized in that (3) the metal sheet is applied between the slab and the forging tool, and (3) the material is A vibration forging device, which is configured so that the gap gradually decreases along the moving direction and is equipped with a vibrating forging tool, is installed in continuous casting equipment (line) for molten metal or on an extension line thereof, and Direct production of thin metal sheets from slabs, characterized in that the width of the product obtained by forging is controlled by continuously reducing and forging the slabs and changing the frequency and amplitude of the forging tool. This is the way to do it.

[For production]

The present invention involves performing forging instead of rolling, controlling the frequency and amplitude of the reciprocating vibrations of the forging tool to control the stress in the advancing direction that acts on the slab during forging, and changing the width of the product. The problem is solved by supplying lubricant to the machining part while the machine is away from the workpiece.

Figure 2 shows the forged part. A pair of forging tools each having a tapered part and a flat part having an angle α are forging a slab in synchronization with each other, each with an amplitude a and a frequency f. The thickness of the slab is I]
, when the thickness of the product band on the exit side is h, the relationship between the billet feeding speed V, amplitude a, and frequency f, and the contact length between the tool and the workpiece Ll: Tapered part, I5□: Flat part ) is represented by formulas 1 to 3.

V=ar/lanαIL+
= (Hh) / tar+α/ 2 212
-V/f In the 3rd forging diagram, the shaded area is the part that is rolled down in one forging. Here I+
= 20 w, h = 2 mm, V-1000m+
+, α-56, and the amplitude a is 0.51,
f=175Hz, L+=103m+w, Lg=5.7
m. Therefore, the tool length L of the machining part is approximately Loomm.
It is. In other words, a punch with a width of 100 dragons will reduce the pressure by 0.5 wm. 20 on a rolling mill with a roll diameter of 800 mm
Compared to performing 90% reduction from m to 2111 in one pass, the load required for processing is considerably smaller (about 1/10)
However, since it is not possible to reduce the rolling by 90% in one pass of rolling, an accurate comparison cannot be made.

Also, here, without changing other conditions, only the frequency of the tool is 1.
If it is reduced by 0%, the billet feeding speed ■ will not change, but the speed at which the forging machine digests will decrease by 10%, so a compressive force equivalent to 10% speed imbalance will be applied to the billet between the casting machine and the forging machine. do. Therefore, the width increases during forging. Therefore, the product width can be controlled by changing the frequency f (similarly, the amplitude a). However, when changing the amplitude, care must be taken not to change the lowest point of the tool stroke, otherwise the product thickness will change.

Although FIG. 2 shows a case where there is a tapered part (straight line) with an angle α, this straight part may be a curved line.

Another feature of the present invention is that it is easy to lubricate the processed parts. When the tool (roll) is rotating, as in rolling, the tool and workpiece are always in contact, so
The lubricant is supplied only from the entrance of the machining section, and in order to have a lubricating effect on the entire machining area, a special lubricant must be used or a large amount of lubricant must be used, which is expensive, but this vibration forging In this case, the tool and workpiece are separated periodically, so lubricant can be supplied directly to the machined part from outside.
The amount of lubricant used is small (and it is less expensive as it does not need to be a special lubricant.Also, as shown in Figure 2, it can be supplied not only from the input side but also from the output side, so it can be supplied to the entire machining area. Very easy to supply.

〔Example〕

Figure 1 shows a thin slab 2 with a thickness of 20 m made by continuous casting as a representative example.
This shows a process for obtaining a hot rolled strip 7 with a thickness of 2N by casting and directly processing. The casting machine 1 in the same figure is, for example,
5-16752 is used. However, the rolling mill is not installed inside the casting machine. A vibration forging device 4 is installed on the slab removal line 7, and a pinch roll 3 is placed in front of it to apply compressive force to the slab. Furthermore, nozzles are installed at the inlet and outlet of the forging machine 4 for supplying lubricant to the processing section. Approximately 100℃, speed 60
The slab with a thickness of 2Qmm and a width of 1000mm left the casting machine at a speed of m/min is sent to the forging equipment by the feeding device and pinch roll 3 in the casting machine, and the tool amplitude is Q,5 +n and the frequency is 175.
The strip is forged with 11z and has a thickness of 2-1 and a width of 1010m11. Naturally, the lubricant nozzle at the forging machine outlet supplies lubricant to the processing section in synchronization with the vibration of the tool, protecting the tool and reducing the forging load. Here, the nozzle on the outlet side also serves to prevent the lubricant injected with considerable pressure from the inlet side from blowing out to the outlet side. If the frequency of the tool is reduced by 10% in the middle, a strip with a thickness of 2I11 and a width of 10103O is obtained. Since this width change is instantaneously performed, strips of various sizes can be manufactured with high yield. Furthermore, due to the lubrication effect, the strip surface texture can be maintained well while casting continues without changing tools.

〔Effect of the invention〕

According to the present invention, a continuous caster and a processing device are directly connected, and metal strip can be directly manufactured from slabs at low equipment costs. In addition, a wide variety of product widths can be manufactured at high yields, and the product surface texture is good. Furthermore, running costs are low because less lubricant is used, which reduces tool wear and allows continuous operation for long periods of time.

[Brief explanation of drawings]

Figure 1 shows the process of directly processing continuously cast slabs to obtain hot rolled strips, in which 1: casting machine, 2: slab, 3
: Vinci roll, 4: Forging machine, 5: Entry side lubrication nozzle, 6
: Output side lubricating nozzle, 7; Hot rolled strip. Fig. 2 is a diagram showing the forging processing section, where ■ = billet feeding speed, ■ (: inlet slab thickness, h: outlet product thin plate thickness, I7:
Contact length between tool and workpiece, Ll: Partial length of taper,
L2: Full throat length, a: tool amplitude, α: tool taper. I Figure 2

Claims (3)

[Claims] (1) Continuous casting of molten metal using a vibration forging device equipped with forging tools that vibrate and are configured so that the gap gradually decreases along the material movement direction, facing each other in the plate thickness direction with the slab in between. 1. A method for directly manufacturing thin metal sheets from slabs, which is characterized in that the machine is installed within a facility (line) or on an extension line thereof, and continuously presses and forges slabs. (2) Continuous casting of molten metal using a vibration forging device equipped with forging tools that vibrate and are configured so that the gap gradually decreases along the material movement direction, facing each other in the plate thickness direction with the slab in between. It is installed within the equipment (line) or on its extension line to continuously reduce and forge the slab, and to apply lubricant while the forging tool is away from the slab, which occurs depending on the vibration frequency. A method for directly producing a thin metal sheet from a cast slab, characterized in that the method is applied between the slab and a forging tool. (3) Continuous casting of molten metal using a vibratory forging device equipped with forging tools that vibrate and are configured so that the gap gradually decreases along the material movement direction, facing each other in the plate thickness direction with the slab in between. It is installed within the equipment (line) or on its extension line, and continuously reduces and forges the slab, and controls the width of the product obtained by forging by changing the frequency and amplitude of the forging tool. A method for directly manufacturing thin metal sheets from slabs, characterized in that: