KR100327794B1 - System for forging metal plate - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a metal sheet rolling system that does not use a roller. The present invention relates to at least one die installed at a lower portion of a metal plate and a metal plate corresponding to the die, for rolling a metal plate guided to a plurality of guide rollers. At least one non-roller rolling device (Roll Free Reduction; REF) for continuous forging and rolling. According to such a rolling system, the cost and effort for replacing the roller can be reduced by not using expensive rollers, thereby improving the productivity of the metal plate.

Description

System for forging metal plate

The present invention relates to a metal sheet rolling system for rolling and stretching a metal sheet.

1 is a block diagram of a conventional metal sheet rolling system. Referring to the drawings, a plurality of guide rollers 1 are arranged in a row, and the first, second and third compression rollers 2a, 2b (3a, 3b) (4a, 4b) rotated and driven between the guide rollers. Is installed. In the first compression roller, the interval between the 2a roller and the 2b roller is the largest, and then the interval between the 3a roller and the 3b roller and the interval between the 4a roller and the 4b roller are sequentially reduced. The thick metal plate 5 of the high temperature state guided by the guide roller 1 is rolled while passing through the first, second and third compression rollers 2a and 2b and 3a and 3b and 4a and 4b. Finally, it becomes thinner by the roller 4a, 4b space | interval.

However, the surface of the first, second, third compression rollers is easily worn as they rotate while pressing the metal plate in a high temperature state. Therefore, the thickness of the finally produced metal plate is not constant, and furthermore, the surface state of the metal plate is uneven.

In addition, since each pressing roller is always in contact with the hot metal plate, deformation of the roller shape due to the temperature of the metal plate is caused. Due to such a deformation of the roller shape, the thickness of the metal plate is no longer constant.

In addition, as the surface is easily worn, the first, second and third compression rollers need to be replaced frequently. Since the compression rollers are considerably expensive, the replacement cost is very high, and the rolling system including the compression rollers is very complicated. The problem was that the work was very complicated.

The present invention has been made on the basis of the above problems, and an object of the present invention is to provide a metal sheet rolling system which does not employ expensive pressing rollers and which is low in manufacturing cost and which can effectively perform a rolling process.

1 is a block diagram of a conventional metal sheet rolling system,

2 is a block diagram of a metal sheet rolling system according to the present invention,

3 is a view showing a first embodiment of the non-roller rolling apparatus shown in FIG.

4 is a view showing a second embodiment of the non-roller rolling apparatus shown in FIG.

5 is a view showing a third embodiment of the non-roller rolling apparatus shown in FIG.

<Description of the symbols for the main parts of the drawings>

5 ... metal plate 10 ... guide roller

20, 30, 40 ... 1, 2, 3 die

20a, 30a, 40a ... Daigo Heavy Metal Tip

25, 35, 45 ... Cooling means 110, 120, 130 ... Case

111, 121, 131 ... bar

111a, 121a, 131a ... high strength metal tip

112, 122, 132 ... spring 115 ... cam

116 ... rotating means 125 ... cylinder

126 ... piston 135 ... coil

136 ... ferrite 137 ... spring

In order to achieve the above object, the metal sheet rolling system according to the present invention, a metal sheet rolling system for rolling a metal plate guided by a plurality of guide rollers, at least one die provided in the lower metal plate; At least one roll free reduction apparatus (REF) provided on an upper portion of the metal plate corresponding to the die and continuously forging and rolling the metal plate, wherein the non-roller rolling apparatus includes a case and the case. A bar for punching the metal plate, a bar strong metal tip coupled to the bar, a spring installed on the case and elastically biasing the bar in one direction, and installed on the case And an actuator for vibrating the bar. In this case, the first embodiment of the actuator is rotatably installed in the case, and has a cam having a different radius of rotation in contact with an upper surface of the bar. And a well-known rotation driving means for rotating the cam. In addition, the second embodiment of the actuator Has a cylinder through which gas flows in and out, and a piston reciprocated by the oil or gas in the cylinder to apply vibration to the bar. [0023] In a third embodiment of the actuator, an alternating current is applied to generate a magnetic field. And a magnetic body for applying vibration to the bar by being reciprocally conveyed by the magnetic field. Further comprising cooling means for cooling the bar. Hereinafter, a metal sheet rolling system according to the present invention will be described in detail with reference to the accompanying drawings.

2 is a block diagram of a metal sheet rolling system according to the present invention. Referring to the drawings, a plurality of rotationally driven guide rollers 10 are arranged in a row, and the hot metal plate 5 raised by the guide rollers 10 is gradually transferred to one side. The first, second, and third dies 20, 30, and 40 are installed at regular intervals, and the first, second, and third dies 20, 30, and 40 are replaced with replaceable dies. Strong metal tips 20a, 30a, 40a are coupled. The die high strength metal tip is in contact with the lower surface of the metal plate 5.

On the upper portion of the metal plate 5 corresponding to each die, three non-roller rolling devices (hereinafter referred to as REF) for continuously forging and rolling the metal plate 5 are provided.

Cooling means (25) (35) (45) for cooling the bars (111) (121) (131) for punching the metal plate is installed at the lower end of the REF. The cooling means prevents the bar 111 from being excessively overheated by the high-pressure cooling air is injected and the heat conduction by the high-temperature metal plate (5). At this time, the cooling means may take a method of injecting a fluid to the bar 111, or may further take the manner of circulating the cooling oil into the bar 111, such cooling means is the scope of the present invention Do not limit. By employing the above cooling means, it is possible to minimize the thermal expansion of the bar 111 due to overheating in the process of punching the hot metal plate (5). In other words, the service life of the bar can be extended. In this embodiment, the cooling means is installed only around the bar, but of course it can also be installed in the die.

Next, one of the three REFs described above is taken out and described.

FIG. 3 is a diagram illustrating a first embodiment of the REF shown in FIG. 2. Referring to the drawings, the first embodiment of the REF is a case 110 fixed to the upper ceiling of the rolling system, and a bar 111 for punching the metal plate 5 installed in the case 110 so as to be reciprocally transported. ), A spring 112 installed in the case 110 to elastically bias the bar 111 in one direction, and an actuator installed in the case 110 to apply vibration to an upper surface of the bar 111. . At this time, it is preferable that the bar high-strength metal tip 111a is replaceable at the lower end of the bar 111.

The actuator has a cam 115 having a different rotation radius in contact with the upper surface of the bar 111 and a rotation driving means 116 for rotating the cam 115. The rotation driving means 116 is a known configuration, and may be an electric motor which is rotationally driven by electricity, or may be a hydraulic motor that is rotationally driven by hydraulic pressure.

Looking at the REF operation of this structure, the cam 115 is rotated at high speed by the rotation driving means 116 to change the rotation radius of the cam and thus vibrates the bar 111. In detail, when the cam surface of the large radius presses the upper surface of the bar 111, the bar 111 descends, and when the cam surface of the small radius corresponds to the top surface of the bar 111, the bar 111 is formed by the spring 112. ) Is rising. When the cam rotates at a high speed, the bar 111 vibrates up and down due to the continuous rotation of the cam 115 and the elastic force of the spring 112, so that the metal plate placed on the die can be continuously forged. The metal plate rolled by the first REF is sequentially rolled while passing through the second and third REFs having the same operation as described above to have a predetermined thickness.

4 is a diagram illustrating a second embodiment of the REF shown in FIG. 2. Referring to the drawings, the second embodiment of the REF, a case 120 fixed to the upper ceiling of the rolling system, a bar for punching the metal plate 5 is installed in the case 120 so as to reciprocate transfer ( 121, a spring 122 mounted on the case 120 to elastically bias the bar 121 in one direction, and an actuator installed inside the case 120 to apply vibration to the upper surface of the bar 121. The bar 121 is coupled to the same bar high-strength metal tip 121a as in the first embodiment.

The actuator includes a cylinder 125 through which oil or gas flows in and a piston 126 reciprocated by oil or gas in the cylinder 125. The piston 126 is provided with various rings (oil rings, sealing rings, etc.) for ensuring the sealing with the cylinder 125.

The operation of the REF of this structure causes the gas or oil to move up and down the piston 126 as it enters and exits the cylinder 125, and this lifting motion is transmitted to the bar 111. As described above, the bar 121 vibrates in the up and down direction by the continuous lifting motion of the piston 126 and the elastic force of the spring 112, and thus the metal plate mounted on the die can be continuously forged.

FIG. 5 is a diagram illustrating a third embodiment of the REF shown in FIG. 2. Referring to the drawings, a third embodiment of the REF includes a case 130 fixed to an upper ceiling of a rolling system, and a bar 131 installed in the case 130 so as to be reciprocated and punched on a metal plate 5. ), A spring 132 installed on the case 130 to elastically bias the bar 131 in one direction, and an actuator installed inside the case 130 to apply vibration to an upper surface of the bar 131. At the bottom of the bar 131, the bar high-strength metal tip 131a described in the first and second embodiments is provided.

The actuator includes a coil 135 for applying an alternating current to generate a magnetic field, and a magnetic body 136 for applying vibration to the bar 131 by being reciprocated by the magnetic field. In addition, a spring 137 is installed between the case 130 and the magnetic body 136 to prevent the vibration force of the magnetic body 136 from being well transmitted to the case.

According to the REF of this structure, when an alternating current is applied to the coil 135, the N pole and the S pole are alternately formed in the coil 135, and the magnetic body 136 vibrates as the N-S pole is switched. This vibration is transmitted to the bar 111 while overcoming the elastic force applied to the spring 132. That is, the bar 111 vibrates in the up and down direction due to the vibration of the magnetic body 136 and the elastic force of the spring 112, so that the metal plate mounted on the die can be continuously forged.

Next, the operation of the metal sheet rolling system of the present invention will be described.

By the guide roller 10, a metal plate of a predetermined thickness is first rolled while passing through the first REF. That is, the bars 111, 121 and 131 are vibrated by an actuator in the REF, and thus the metal plate mounted on the first die 20 is continuously forged. In this way, the metal plate thinned first to a predetermined thickness is sequentially rolled while passing through the second REF and the third REF to a predetermined thickness.

At this time, if the rolling for a long time, the bar high strength metal tip (111a) (121a) (131a) of the die is damaged, in this case, the bar high-strength metal tip or die high-strength metal tip is removed and replaced with another metal tip The rolling can be progressed again. In other words, instead of replacing the pressing roller itself as in the prior art, simply replace the bar high strength metal tip or die high metal tip coupled to the upper and lower ends of the bar or die, the replacement cost is very small, It is easy.

Although the present invention has been described with reference to one embodiment shown in the drawings, this is merely exemplary, and those skilled in the art will understand that various modifications and equivalent other embodiments are possible therefrom.

According to the metal sheet rolling system of the present invention, by employing a non-roller rolling apparatus and a die having a bar which vibrates up and down, rolling can be performed without using a compaction roller. Therefore, the installation cost for employing the compaction roller can be reduced.

In addition, when the upper and lower surfaces of the bars and dies are damaged through continuous rolling, only the bar high strength metal tip or the die high strength metal tip needs to be replaced, instead of replacing the entire bar or die, thereby reducing the cost and effort required for replacement. The effect is that you can.

Claims (6)

In the metal sheet rolling system for rolling a metal plate guided to a plurality of guide rollers, At least one die disposed below the metal plate; At least one roll free reduction apparatus (REF) installed at an upper portion of the metal plate corresponding to the die to continuously forge and roll the metal plate; The non-roller rolling device, a case, a bar for reciprocatingly installed on the case, a bar for punching the metal plate, a bar high-strength metal tip coupled to the bar, and installed in the case, the bar in one direction And a spring for elastically biasing and an actuator installed in the case to vibrate the bar. delete The method of claim 1, wherein the actuator, A cam rotatably installed in the case and having a different radius of rotation in contact with the upper surface of the bar; And a known rotation driving means for rotating the cam. The method of claim 1, wherein the actuator, And a piston through which oil or gas flows in and out, and a piston reciprocating by the oil or gas in the cylinder to apply vibration to the bar. The method of claim 1, wherein the actuator, And a coil for applying an alternating current to generate a magnetic field, and a magnetic material for applying vibration to the bar by being reciprocated by the magnetic field. The method according to any one of claims 3 to 5, And a cooling means installed at a lower end of the non-roller rolling apparatus, and cooling means for cooling the bar by injecting a high pressure cooling air or a fluid into the bar.