KR20210087138A - Rolling apparatus for alkali metal or alkali metal alloy and method for rolling of alkali metal or alkali metal alloy using the same - Google Patents

Abstract

Disclosed are an apparatus for rolling alkaline metal or alkaline metal alloy, capable of automatically controlling a roll gap in real time by automatically sensing the sagging of a material caused by a deviation of the roll gap, thereby solving a thickness deviation between left and right sides of a product and its subsequent issue such as meandering, a winding defect, a broken material or the like, and a method of rolling alkaline metal or alkaline metal alloy by using the same. The apparatus includes: an unwinder supplying a sheet of alkaline metal; at least one pair of rolling rolls rolling the alkaline metal supplied from the unwinder; a rewinder winding the alkaline metal rolled by the rolling rolls; at least two metal material sagging detection sensors provided between the unwinder and the rolling rolls to detect the degree of the sagging of the alkaline metal transferred from the unwinder to the rolling rolls; and a roll-gap controller receiving information from the metal material sagging detection sensors to control a roll gap between the rolling rolls when the alkaline metal is sagging.

Description

Alkali metal or alkali metal alloy rolling apparatus and method for rolling alkali metal or alkali metal alloy using same {Rolling apparatus for alkali metal or alkali metal alloy and method for rolling of alkali metal or alkali metal alloy using the same}

The present invention relates to an alkali metal or alkali metal alloy rolling apparatus and a method for rolling an alkali metal or alkali metal alloy using the same, and more particularly, to automatically detect the sagging of the fabric due to the deviation of the roll gap in real time by detecting the roll gap By this automatic adjustment, an alkali metal or alkali metal alloy rolling apparatus and an alkali metal or alkali metal alloy rolling using the same, which can solve problems such as the left and right thickness deviation of the product and the meandering, winding defect, and fabric breakage caused thereby it's about how

In general, in order to produce an alkali metal or alloy foil thereof such as lithium (Li), sodium (Na) and potassium (K), which has very soft properties compared to other metals, a process of rolling a thick film foil is required Do. However, if there is a difference in the left and right roll gaps during rolling, not only the left and right thickness deviation of the product, but also the fabric on the side with the smaller gap stagnates, which inevitably causes meandering, and in severe cases, due to the speed difference, A fracture phenomenon in which the fabric of (the side with a larger gap) is torn may occur.

In particular, in the case of alkali metal, as described above, it is very soft compared to other metals, and therefore, it is difficult to apply a large tension to overcome the meandering, and the above phenomenon occurs more conspicuously even with a small gap difference. Moreover, it is virtually impossible to directly measure the left and right roll gaps while the rolling apparatus is being driven, so it is very difficult to overcome the above problems.

1 is a schematic side view of a conventional roll gap adjusting device. Accordingly, in the related industry, in order to solve the above problems, as shown in FIG. 1 , the product passing through the rolling roll 10 is measured with the thickness measuring device 20 and fed back to adjust the roll gap. This is the only situation that consumes a lot of time and money. In addition, due to the distance between the product passing through the rolling roll 10 and the thickness measuring device 20 as described above, a delay in feedback inevitably occurs (that is, immediate feedback is not possible), and therefore, even in this case, (thickness deviation Due to this), it is inevitable to cause a decrease in product yield, meandering, poor winding, and fabric breakage.

On the other hand, Republic of Korea Patent Registration No. 10-0831202 discloses a temperature-controlled roll gap control device that can be used even in high-pressure and heavy-weight rolls, each having an upper roll choke and a lower roll choke on both sides of the rolling roll, , by inserting a heating element and a metal block between them, the roll gap is controlled by the coefficient of thermal expansion according to the temperature of the metal block. However, since No. 0831202 describes a method of simply adjusting the roll gap without monitoring or feedback on the product status, it is difficult to fundamentally solve the roll gap deviation from the mechanical tolerance, and it takes time to heat and cool the metal block. Therefore, there is a problem in that it is difficult to adjust the roll gap immediately. In addition, since the range of thermal expansion of the metal block is limited, the control range of the roll gap is also limited, and due to the heat from around the rolling roll, there is a very high possibility that the deformation of the fabric may occur, and there is a possibility that a problem affecting safety may occur. have.

In addition, Republic of Korea Patent Registration No. 10-1803490 relates to an apparatus for manufacturing copper foil for batteries that does not bend or sag when the copper foil passes through the pressure roller, and the pressure roller moves instantaneously when controlling the moving speed of the copper foil to flexibly cope with it. , metal such as copper foil for lithium ion batteries is transferred and pressurized with a pressure roller, and the metal sag is prevented by receiving the degree of deflection of the metal from the sensing unit (ultrasound/infrared sensor, etc.) of the control unit during transfer and pressurization to control the speed of the drive motor It is disclosing what to do. However, in No. 1803490, it is difficult to fundamentally solve the above problems because it is only to control the speed of the electric motor driving motor that rotates the pressure roller after detecting the sagging of the fabric or to move the transfer roller up and down, and the detection sensor is Therefore, it is difficult to fully understand the deflection of the metal.

Therefore, there is a need for a more fundamental solution that can prevent the occurrence of deterioration of product yield due to thickness deviation, meandering, poor winding, and fabric breakage.

An object of the present invention is to automatically detect the sagging of the fabric due to the deviation of the roll gap and automatically adjust the roll gap in real time, thereby solving problems such as the left and right thickness deviation of the product and the meandering, winding defect, and fabric breakage caused by this It is to provide an alkali metal or alkali metal alloy rolling apparatus and a method for rolling an alkali metal or alkali metal alloy using the same, which can be eliminated.

In order to achieve the above object, the present invention, an unwinder for supplying an alkali metal material in the form of a sheet; at least one pair of rolling rolls for rolling the alkali metal material supplied from the unwinder; a re-winder for winding the alkali metal material rolled on the rolling roll; two or more metal material sag detection sensors provided between the unwinder and the rolling roll to detect the degree of deflection of the alkali metal material transferred from the unwinder to the rolling roll; and a roll-gap adjuster that receives information from the metal material sag detection sensor and adjusts the roll gap of the rolling roll when the alkali metal material sags. It provides an alkali metal or alkali metal alloy rolling apparatus comprising a.

In addition, the present invention, (a) the step of transferring the sheet-shaped alkali metal material released from the unwinder in the direction of one or more pairs of rolling rolls; (b) rolling the transferred alkali metal material through the rolling roll; and (c) winding the rolled alkali metal material with a re-winder, wherein two or more metal material sag detection sensors provided between the un-winder and the rolling roll are removed from the un-winder. Detects the degree of sag of the alkali metal transferred to the rolling roll, and the roll-gap adjuster interlocked with the metal sag detection sensor automatically adjusts the roll gap of the rolling roll in real time when the sag of the alkali metal material is detected through the metal sag detection sensor It provides a rolling method of an alkali metal or alkali metal alloy, characterized in that.

The alkali metal or alkali metal alloy rolling apparatus according to the present invention and the method of rolling an alkali metal or alkali metal alloy using the same, by automatically detecting the sagging of the fabric due to the deviation of the roll gap and automatically adjusting the roll gap in real time, the product It has the advantage of being able to solve problems such as the left and right thickness deviation of , meandering, winding defect, and fabric breakage caused by it.

1 is a schematic side view of a conventional roll gap adjusting device.
2 is a schematic side view (a) of an alkali metal or alkali metal alloy rolling apparatus according to an embodiment of the present invention and a front schematic view (b) showing a state when the metal sag detection sensor of the rolling apparatus operates.

Hereinafter, with reference to the accompanying drawings, the present invention will be described in detail.

2 is a schematic side view (a) of an alkali metal or alkali metal alloy rolling apparatus according to an embodiment of the present invention and a front schematic view (b) showing a state when the metal sag detection sensor of the rolling apparatus operates.

Alkali metal or alkali metal alloy rolling apparatus according to the present invention, as shown in FIG. 2, from the unwinder 100 for supplying the alkali metal material 200 in the form of a sheet, the unwinder 100 One or more pairs of rolling rolls 300 for rolling the supplied alkali metal material 200, a re-winder 400 for winding the alkali metal material 200 rolled by the rolling roll 300, and the unwinder ( Two or more metal sag detection sensors 500 provided between 100) and the rolling roll 300 to detect the degree of sag of the alkali metal material 200 transferred from the unwinder 100 to the rolling roll 300 . ) and a roll-gap adjuster (not shown) for receiving information from the metal material sag detection sensor 500 and adjusting the roll gap of the rolling roll 300 when the alkali metal material 200 sags.

The present applicant has been continuously considering the problems of conventional metal rolling equipment, that is, the deviation of the left and right thickness of the fabric due to the deviation of the roll gap, and the problems such as meandering, winding defect, and fabric breakage caused by this, As a result of repeated research, it was possible to solve the above problems through the interlocking of the metal sag sensor of the present invention and the roll-gap regulator, and this invention is the applicant's own invention that has not been found so far. can

That is, in the alkali metal or alkali metal alloy rolling apparatus according to the present invention, a metal material sag detection sensor and a roll-gap adjuster are additionally applied to a conventional rolling apparatus, and the metal material deflection detection sensor is a roll gap left and right deviation of the rolling roll. When the sagging of the fabric (alkali metal) is automatically detected, the roll-gap adjuster automatically adjusts the roll gap in real time. It can solve problems such as

Hereinafter, the alkali metal or alkali metal alloy rolling apparatus of this invention is demonstrated more concretely. Referring to FIG. 2 , the unwinder 100 is for supplying the alkali metal material 200 in the form of a sheet to the rolling roll 300 side, and the re-winder 400 is from the rolling roll 300 . As for winding the rolled alkali metal material 200, since these configurations are common, a detailed description thereof will be omitted. In addition, the alkali metal material may be a general alkali metal such as lithium (Li), sodium (Na) and potassium (K) or an alloy containing the alkali metal, but it is advantageous in effect through the rolling apparatus of the present invention even if it is not an alkali metal It can be applied without any particular limitation as long as it can be a metal. In addition, the alkali metal material is more efficiently and flexibly transferred between the unwinder 100 and the rolling roll 300 and between the rolling roll 300 and the re-winder 400 , respectively. One or more transfer rolls 200 may be provided.

The metal sag sensor 500, which is one of the core components of the present invention, is provided between the unwinder 100 and the rolling roll 300, and the unwinder 100 from the rolling roll ( It is for detecting the degree of sagging of the alkali metal material 200 transferred to 300). On the other hand, the sagging phenomenon of the alkali metal material 200 is caused by the deviation of the (rolling) roll gap, and therefore, the degree of sagging of the alkali metal material 200 is near the (metal) input part of the rolling roll 300. will appear the largest.

For this reason, it is preferable that the metal material sag detection sensor 500 is located as close as possible to the input portion of the rolling roll 300 . In addition, when one or more transfer rolls 200 are provided between the unwinder 100 and the rolling roll 300 , as shown in a of FIG. 2 , the most suitable for the rolling roll 300 . It is preferable that the metal sag sensor 500 is installed between the closely located transfer roll 200 and the rolling roll 300 . On the other hand, the metal material sag detection sensor 500 can detect the deflection of the alkali metal material 200 through a method of measuring the distance from the metal material (fabric), and thus the metallic material deflection detection sensor 500 It may be preferable to be located on the alkali metal material 200 .

The metal sag detection sensor 500 can measure the distance from the target object, and when it deviates from a specific distance, it can be a conventional sensor that can directly send an abnormality detection signal to a server or a control device, etc., Any means satisfying the above conditions may be used without any particular limitation, and examples thereof include a laser sensor, an ultrasonic sensor, and an infrared sensor.

In addition, two or more of the metal material sag detection sensor 500 should be installed to more clearly detect the left and right sag of the metal material 200 . For example, when two metal sag detection sensors 500 are installed, as shown in FIG. 2 b , one sensor may be located at each upper portion of both ends in the width direction of the metal material 200 ( 500a, 500b). That is, when two metal sag detection sensors 500 are used/installed in this way, one metal sag detection sensor 500a detects the sag of the metal 200, and the other metal sag detection sensor 500b ) detects the lifted or normal state of the metal material 200 , and each of the sensors 500a and 500b immediately transmits a respective detection signal to a server or a roll-gap controller, or the like.

When the sag detection signal is sent from the metal sag detection sensor 500b as described above, the roll-gap adjuster that recognizes (receives) this automatically adjusts the roll gap of the rolling roll 300 in real time. That is, in other words, the roll-gap regulator (not shown) is closely interlocked with the metal sag detection sensor 500 , so when the sag of the alkali metal 200 is detected through the metal sag detection sensor 500 . , which is another one of the key components of the present invention for instantly and automatically adjusting the roll gap of the rolling roll 300 according to the degree of its deflection.

The roll-gap adjuster may have a method capable of adjusting the roll-gap, such as a method using mechanical sliding or a method using a hydraulic cylinder. In addition, the roll-gap adjuster is preferably installed in the vicinity of the rolling roll 300 for convenience, but receives a detection signal from the metal material sag detection sensor 500 to adjust the roll gap of the rolling roll 300 in real time There are no special restrictions on the installation location as long as there are a few.

The roll-gap adjustment through the roll-gap adjuster does not move the entire rolling roll 300, but adjusts only a portion of the rolling roll that has deviation, so there is almost no feedback delay and the error due to adjustment can be minimized, Accordingly, it is possible to prevent or minimize the occurrence of deterioration in product yield, meandering, poor winding, and even breakage of the fabric.

More specifically, when the roll-gap adjuster receives a deflection detection signal from the metal material deflection detection sensor 500, the roll-gap adjuster increases the (rolling) roll gap of the side where the deflection of the metallic material occurs or increases the opposite side of the roll gap. By reducing the (rolling) roll gap, the stagnant metal parts can be resolved, and thus the sagging of the metal (fabric) can be restored.

On the other hand, the roll-gap adjuster can variably adjust the roll gap according to the degree of deflection of the metal material 200. For example, when the degree of deflection is 1 mm or more, it is preferable to adjust the roll gap in units of about 2 μm. It may be desirable, and when the degree of deflection is less than 1 mm, it may be preferable to adjust the roll gap in units of about 0.5 μm.

Next, a method of rolling an alkali metal or an alkali metal alloy using the rolling apparatus according to the present invention will be briefly described. The method of rolling the alkali metal or alkali metal alloy includes the steps of (a) transferring an alkali metal material in the form of a sheet released from an unwinder in the direction of one or more pairs of rolling rolls, (b) rolling the transferred alkali metal material Rolling through a roll and (c) winding the rolled alkali metal material with a re-winder, wherein two or more metal material sag detection sensors provided between the unwinder and the rolling roll The roll of the rolling roll detects the degree of sag of the alkali metal material transferred from the unwinder to the rolling roll, and the roll-gap adjuster interlocked with the metal sag detection sensor detects the sag of the alkali metal material through the metal sag sensor. It is characterized in that the gap is automatically adjusted in real time.

Claims (13)

an unwinder for supplying an alkali metal material in the form of a sheet;
at least one pair of rolling rolls for rolling the alkali metal material supplied from the unwinder;
a re-winder for winding the alkali metal material rolled by the rolling roll;
two or more metal material sag detection sensors provided between the unwinder and the rolling roll to detect the degree of deflection of the alkali metal material transferred from the unwinder to the rolling roll; and
Alkali metal or alkali metal alloy rolling apparatus comprising a; by receiving information from the metal material sag detection sensor, and adjusts the roll gap of the rolling roll when the alkali metal material sags. The alkali metal or alkali metal alloy rolling apparatus according to claim 1, wherein the metal material deflection sensor detects the deflection of the alkali metal material due to a left and right deviation of the roll gap of the rolling roll. The alkali metal or alkali metal alloy rolling apparatus according to claim 1, wherein the metal material sag detection sensor is positioned as close as possible to the input portion of the rolling roll. The method according to claim 1, The metal sag sensor is characterized in that located on the upper portion of the alkali metal, alkali metal or alkali metal alloy rolling apparatus. The apparatus according to claim 1, wherein the metal sag detection sensor is selected from the group consisting of a laser sensor, an ultrasonic sensor, and an infrared sensor. The alkali metal or alkali metal alloy rolling apparatus according to claim 1, wherein the number of the metal material sag detection sensors is two, and one is located at each upper portion of both ends in the width direction of the alkali metal material. The alkali metal of claim 1, wherein the roll-gap adjuster is interlocked with the metal sag detection sensor to automatically adjust the roll gap of the rolling roll in real time by receiving a sag detection signal from the metal sag detection sensor. or alkali metal alloy rolling equipment. The alkali metal or alkali metal alloy rolling apparatus according to claim 1, wherein the roll-gap adjuster adjusts only a portion of the rolling roll in which the deviation occurs. The method according to claim 1, wherein when the roll-gap adjuster receives a deflection detection signal from the metal material deflection sensor, the roll-gap adjuster increases the roll gap on the side where the deflection of the metal material occurs or reduces the roll gap on the opposite side. Alkali metal or alkali metal alloy rolling apparatus, characterized in that. The method according to claim 1, wherein the roll-gap regulator adjusts the roll gap in units of 2 μm when the degree of sag of the metal material is 1 mm or more, and adjusts the roll gap in units of 0.5 μm when the degree of sag of the metal material is less than 1 mm An alkali metal or alkali metal alloy rolling apparatus, characterized in that. The alkali metal or alkali metal alloy rolling apparatus according to claim 1, wherein the alkali metal material is an alkali metal or an alloy containing the alkali metal. The method according to claim 1, wherein each between the unwinder and the rolling roll and between the rolling roll and the re-winder, characterized in that at least one transfer roll for transferring the alkali metal material is provided, alkali metal or Alkali metal alloy rolling equipment. (a) transferring the alkali metal material in the form of a sheet released from the unwinder in the direction of one or more pairs of rolling rolls;
(b) rolling the transferred alkali metal material through the rolling roll; and
(c) winding the rolled alkali metal material with a re-winder;
Two or more metal material sag detection sensors provided between the unwinder and the rolling roll detect the deflection degree of the alkali metal material transferred from the unwinder to the rolling roll,
The roll-gap adjuster interlocked with the metal sag detection sensor automatically adjusts the roll gap of the rolling roll in real time when the sag of the alkali metal is detected through the metal sag detection sensor, characterized in that the alkali metal or alkali metal alloy rolling method.

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