KR20150115219A - Apparatus for processing welding part of strip - Google Patents

Abstract

According to an embodiment of the present invention, an apparatus to process a steel sheet connecting part comprises: a lower planishing roll installed in a lower part of a connecting part where two steel sheets are connected by abutting on each other, and supports a lower surface of the joint; an upper planishing roll installed in an upper part, pressurizing an upper surface of the connection part; a support block coupled to the upper planishing roll and disposed on the upper part of the upper planishing roll to support the upper planishing roll; an elastic member which provides an elastic force to the support block, wherein one end thereof is connected to the support block; and a pressure frame installed in the upper part of the support block, spaced apart from the support block, and connected to an other end of the elastic member to be raised and lowered at a preset distance.

Description

[0001] APPARATUS FOR PROCESSING WELDING PART OF STRIP [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a steel plate joint treatment apparatus, and more particularly, to a steel plate joint treatment apparatus and a steel plate joint treatment apparatus using the elastic force of an elastic member provided between a press frame and a support block, And more particularly, to a steel plate joint treatment apparatus capable of securing the welding quality such that the surface of the steel sheet is flat and smooth.

In general, the Laser Line Welder (LLW), which ensures continuous and continuous welding of the leading and trailing coils, is a unit facility that plays an important role in the cold rolling line of the steel process.

The pre-welded and post-welded materials in the LLW are welded to the surface of the strip by a foreign substance sandwiched between a roll mark or various rolls and a strip which is closely contacted with the surface of the product, Surface defects such as dents are generated.

Korean Registered Patent No. 10-0711454 (Apr. 24, 2007)

SUMMARY OF THE INVENTION It is an object of the present invention to provide a steel plate joint treatment device capable of adjusting the pressing force of the upper flanged ring to press the steel plate joint.

Another problem to be solved by the present invention is to provide a steel plate joint portion treatment device capable of preventing surface defects such as roll marks and dents from occurring in joint portions of steel sheets.

According to an embodiment of the present invention, a steel plate joint processing apparatus includes a lower planetary roller supporting a lower surface of the joint portion, the lower planetary roller being installed at a lower portion of a joint portion where two steel plates are butted against each other; An upper planetary roller installed on the joining portion and pressing the upper surface of the joining portion; A support block coupled to the upper planetary roller and disposed above the upper planetary roller to support the upper planetary roller; An elastic member having one end connected to the support block and providing an elastic force to the support block; And a pressing frame installed on the support block and spaced apart from the support block and connected to the other end of the elastic member to be elevated by a predetermined distance.

The pressing frame includes an insertion portion having an inner space with an opened lower portion, and the elastic member can be inserted into the insertion portion.

The insertion portion may include a fixing ring having a through hole formed in the pressing frame so as to pass through in the up and down direction and inserted into the through hole to form the inner space.

The support block may have an insertion groove formed by recessing an upper surface corresponding to the insertion portion.

One end of the elastic member may be located in the insertion groove.

Wherein the elastic member comprises: a transmission frame fixedly installed in the insertion groove; And an elastic body provided between the stationary ring and the transfer frame to provide the elastic force to the transfer frame.

The insertion portion may have a locking protrusion protruding from the inner circumferential surface of the through-hole.

One end of the transfer frame is connected to the insertion groove and the other end of the transfer frame is disposed between the latching jaw and the elastic body so that the flange can be engaged with the latching jaw.

The elastic body may be a cylindrical coil spring, and the transmission frame may have a hollow cylindrical shape, and the inner diameter of the coil spring may be larger than the inner diameter of the transmission frame.

The steel plate joint processing apparatus may further include a bush inserted into the through hole and the insertion groove, respectively, and having a through hole through which the transmission frame is inserted, the through hole being vertically penetrated.

The supporting block includes: a supporting frame disposed at a lower portion of the pressing frame; A plurality of vertically arranged vertical frames arranged between the support frame and the upper flanging roller and having a horizontal frame connected to the support frame on an upper side thereof and a through hole extending in a downward direction from the lower side of the horizontal frame, A roll housing having a frame; And a shaft inserted and fixed in the through-hole and on which the upper planetary roller is rotatably mounted.

The steel plate joint processing apparatus may further include a shaft holder coupled to the vertical frame and the shaft and fixing the shaft to the vertical frame.

The steel plate joint processing apparatus includes a driving unit connected to the pressing frame and providing a driving force to the pressing frame so that the pressing frame moves up and down; And a control unit connected to the driving unit and controlling the driving unit such that the pressing frame moves up and down by the predetermined distance.

The steel plate joint treatment apparatus according to the present invention has the following effects.

First, by using the elastic force of the elastic body, the pressing force for pressing the steel plate joining portion of the upper planetary roller can be adjusted to a set value.

Secondly, it is possible to prevent surface defects such as roll marks and dents from occurring in the joining portion of the steel sheet.

1 is an overall configuration diagram of a steel plate joint processing apparatus according to an embodiment of the present invention.
2 is a cross-sectional view of a steel plate joint processing apparatus according to an embodiment of the present invention.
3 is a perspective view of a roll planeing unit according to an embodiment of the present invention.
Fig. 4 is a cross-sectional view of the roll plane unit shown in Fig. 3 viewed from direction A. Fig.
5 is a cross-sectional view of the roll planeing unit of Fig.
Fig. 6 is a detailed configuration diagram of the roll planeing unit of Fig. 3;
FIGS. 7 and 8 are views showing the operational states of a roll planeing unit according to an embodiment of the present invention.

It is to be understood that when an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, . On the other hand, when an element is referred to as being "directly connected" or "directly connected" to another element, it should be understood that there are no other elements in between.

Generally, a planishing roll is designed according to the thickness of the strip to be welded and the thickness variation of the strip to be operated, so that a desired degree of welding quality can be obtained. Particularly, when the conventional planarizing roll of the hydraulic type is used as it is in the case of welding a super thin laminated material having a thin strip, various problems may occur as described above. For example, if a planarizing roll of 0.1 to 0.4 mm is used as a planishing roll of a hydraulic type, the roll collides with the strip while entering the strip joint, causing the strip to collapse or severely tear the strip There arises a problem of re-welding.

In order to solve this problem, it is possible to set the interval between the upper and lower plenizing rolls 41 and 42 when entering the strip in consideration of the thickness of the strip currently being welded. However, It is difficult for the interval between fine rolls to be constantly maintained even over time. Also, when a strip thicker than a predetermined roll gap enters during operation, the planing effect is excessive or the strip is wrinkled. In order to prevent this, it is also possible to consider a method of adjusting the interval of the planetary rolls by the thickness of the strip being operated by using the hydraulic pressure when the planing roll 40 moves up and down. However, Can be added.

In the present invention, coil springs and bearing rolls are applied to solve the above-mentioned problems and to maintain a proper planing effect on the joints at all times even when the thickness of the super-thin foil strip in operation is changed. In the case of the super-polar thin steel sheet S, the rotation torque is sufficiently small so that the planishing roll 40 can prevent the steel sheet S from collapsing due to collision when the joint W is squeezed, do. Generally, since the rotational torque of the roll is proportional to the diameter of the roll, the size of the planetary roll 40 must be reduced so that the rotational torque is sufficiently small. As the roll diameter is increased, the self weight is increased and the elasticity of the coil spring 80 is also reduced. Therefore, the roll and the bearing are formed as one body as shown in Fig. 3, In-type roll to reduce the roll diameter and reduce the rotational torque.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The embodiments of the present invention can be modified in various forms, and the scope of the present invention should not be construed as being limited to the embodiments described below. The embodiments are provided to explain the present invention to a person having ordinary skill in the art to which the present invention belongs. Accordingly, the shape of each element shown in the drawings may be exaggerated to emphasize a clearer description.

FIG. 1 is an overall structural view of a steel plate joint treatment apparatus according to an embodiment of the present invention, and FIG. 2 is a sectional view of a steel plate joint treatment apparatus according to an embodiment of the present invention. 1 and 2, a steel plate joint processing apparatus according to the present embodiment includes a housing 10, a cutting unit 90, a joining unit 20, and a roll planeing unit 100.

The housing 10 includes an upper housing 11 and a lower housing 12 which are installed on the upper and lower portions of the steel sheet S and can move along the width direction of the steel sheet S, respectively. The housing 10 is equipped with a cutting unit 90, a bonding unit 20 and a roll plane unit 100.

The cutting unit 90 includes a cutting head connecting frame 91 and a cutting head 92 for cutting the two steel sheets S so that the portions to be welded or welded to each other are parallel to each other.

The cutting head connecting frame 91 is installed on the upper part of the steel sheet S and is connected to the upper housing 11. [ A cutting head 92 is mounted on the cutting head connecting frame 91 to help move the cutting head 92.

The cutting head 92 is mounted on the cutting head connecting frame 91 and disposed on the upper side of the steel sheet S. The cutting head 92 linearly cuts the portions to be welded by bringing the two steel plates S into contact with each other so that the joining unit 20 can be joined well when joined. The cutting head 92 may be a laser head for cutting.

The joining unit 20 is for joining the two steel plates S against each other and comprises a joining head connecting frame 21, an upper pile roll trolley 22, a lower pile roll trolley 23 and a joining head ).

The joint head connecting frame 21 is installed on the upper side of the steel sheet S and is disposed on one side of the cutting unit 90 and connected to the upper housing 11. [ A bonding head (not shown) is attached to the bonding head connecting frame 21 to help move the bonding head (not shown).

The upper pile trolley 22 and the lower pile trolley 23 are provided on the upper and lower portions of the steel sheet S so as to prevent the difference in height between the steel sheets S when the steel sheet S is joined, ).

The bonding head is mounted on the joint head connecting frame 21 and disposed on the upper side of the steel sheet S. The joining head is disposed between the trolls 22 with two upper piles to join the joining portions W where the two steel plates are abutted to be welded (welded). The welding head may be a laser head for welding.

FIG. 3 is a perspective view of the roll planeing unit according to an embodiment of the present invention, FIG. 4 is a cross-sectional view of the roll planeing unit of FIG. 3 viewed from direction A, Fig. 3 to 5, the roll planing unit 100 includes a planetary roller 40, a support block 50, an elastic member 80, a pressing frame 70, and a connecting frame 30 .

The planetary roll 40 is for flattening the joint W produced by the joint head and includes an upper planetary roller 41 and a lower planetary roller 42. The planetary roll 40 may be a bearing type roll which can be miniaturized to minimize the rotational torque of the roll. Further, it is preferable that the outer peripheral surface of the roll is rounded convexly so that the upper planetary roller 41 and the lower planetary roller 42 are kept in point contact so that the frictional force and the rotational torque can be minimized.

The upper planetary roller 41 is provided on the upper portion of the joining portion W and can press the upper surface of the joining portion W with a predetermined pressing force. Here, the pressing force is the sum of the self weight X of the upper planetary roller 41 and the support block 50 and the elastic force Y of the elastic member 80 to be described later.

The lower plenizing roll 42 is provided at the lower portion of the joining portion W and supports the lower surface of the joining portion W. [ The lower plenizing roll 42 is arranged to face each other with the upper planetary roller 42 and the steel plate S interposed therebetween.

The support block 50 is disposed on the upper part of the upper plenizing roll 41 and supports the upper plenizing roll 41 in combination with the upper plenising roll 41. [ The support block 50 includes a bracket 60, a support frame 51, a roll housing 52, a shaft 53 and a shaft holder 54.

The bracket 60 is provided at a lower portion of the pressing frame 70 and is spaced apart from the pressing frame 70 by a predetermined distance. The bracket 60 is installed on the upper part of the support frame 51 and engages with the support frame 51.

The bracket 60 has one or more insertion grooves 61 formed by recessing the upper surface. The insertion groove 61 corresponds to the insertion portion 77 and communicates with the insertion portion 77. A linear transfer frame 82 is fixedly installed in the inner space of the insertion groove 61. One end of the transfer frame 82 is engaged with the bottom surface of the insertion groove 61 and the other end of the transfer frame 82 is positioned at the insertion portion 77 of the pressing frame 70. Therefore, the elastic force supplied from the elastic body 81 can be transmitted to the bracket 60.

The support frame 51 is mounted on the lower portion of the bracket 60 and engages with the bracket 60. The support frame 51 is installed on the top of the roll housing 52 and engages with the roll housing 52. The support frame 51 may have a rectangular plate shape.

The roll housing 52 is connected to the support frame 51 and the upper plenizing roll 41 and has a shape of a letter "C". That is, the roll housing 52 includes a horizontal frame 52a having one side engaged with the support frame 51 and a pair of vertical frames 52b and 52c extending downward from the other side of the horizontal frame 52a . The vertical frames 52b and 52c each have a through hole (not shown) formed to penetrate in the left and right direction, and a shaft 53 on which the upper planetary roller 41 is mounted is inserted and fixed in the through hole.

The shaft 53 is rotatably coupled to the upper plenizing roll 41 and both ends of the shaft 53 are inserted into the through holes of the vertical frames 52b and 52c and fixed to the vertical frames 52b and 52c. That is, the shaft holder 54 provided on the vertical frames 52b and 52c is engaged with the vertical frames 52b and 52c and the shaft 53 to fix the shaft 53 to the vertical frames 52b and 52c. Therefore, only the upper plenizing roller 41 is rotatable without the shaft 53 rotating.

Although the bracket 60 is described as being attached to the support frame 51 in the foregoing description, it is also possible that the support frame 51 does not serve as the bracket 60 without providing a separate bracket 60.

The elastic member 80 is for providing an elastic force generated by the movement of the pressing frame 70 to the supporting block 50. The elastic member 80 has one end connected to the supporting block 50 and the other end connected to the pressing frame 70 do. More specifically, one end of the elastic member 80 is inserted into the insertion groove 61 of the bracket 60, and the other end of the elastic member 80 is inserted into the insertion portion 77 of the pressing frame 70 have. The elastic member 80 may include an elastic body 81 and a transmission frame 82.

The elastic body 81 is provided between the bottom surface of the insertion portion 77 and the transfer frame 82 and provides the elastic force Y generated by the movement of the pressing frame 70 to the transfer frame 82. Specifically, one end of the elastic body 81 is supported by the stationary ring 72, and the other end is connected to the transfer frame 82. The elastic body 81 provides the elastic force Y to the joint W through the support block 50 and the upper planetary roller 41 connected to the transfer frame 82. [ For example, the elastic force Y = the inherent elastic modulus K * the average length displacement of the elastic body 81 (for example, 2.5 [mm]). At this time, the average length displacement of the elastic body 81 may be the moving distance of the pressing frame 70. [

The elastic body 81 may be a hollow cylindrical shape, and a coil spring having an inherent elastic modulus K may be used.

The transfer frame 82 is fixed to the insertion groove 61 of the bracket 60. One end of the transfer frame 82 is connected to the insertion groove 61 of the bracket 60 and the other end of the transfer frame 82 is disposed below the elastic body 81 and connected to the elastic body 81. The transfer frame 82 may have a hollow cylindrical shape. At this time, it is preferable that the outer diameter of the elastic body 81 is larger than the inner diameter of the transmission frame 82. A flange portion 82a protruding from the outer circumferential surface of the transfer frame 82 may be formed at the other end of the transfer frame 82. The flange portion 82a may be disposed between the engagement protrusion 71a and the elastic body 81 and may engage with the engagement protrusion 71a. Therefore, the support block 50 and the upper planing roller 41 are also raised by the upward movement of the pressurizing frame 70. The transfer frame 73 may be formed of a bush stripper bolt having a flange formed at the upper end thereof.

The pressurizing frame 70 is installed on the upper part of the support block 50 and is disposed apart from the support block 50. [ The pressing frame 70 is connected to the upper housing 11 through the connecting frame 30 and can be moved by a predetermined distance in the vertical direction by the driving force provided by the driving unit. 8, when the pressing frame 70 is moved by a predetermined distance S from the initial state in which the elastic body 81 is not compressed as shown in Fig. 7, the pressing frame 70 and the supporting block 50 The elastic body 81 is compressed by a predetermined distance S. Therefore, the elastic body 81 provides the support block 50 with the elastic force (Y) = the elastic modulus K of the elastic body, and the compression distance S of the elastic body. This pressurizing frame 70 includes an insert 77, a main frame 78, a flange frame 75 and an auxiliary frame 74.

The insertion portion 77 has an inner space in which a lower portion of the pressurizing frame 70 is opened and includes a through hole 79 and a retaining ring 72 formed in the pressurizing frame 70 in the vertical direction. The elastic member 80 is inserted into the inner space.

The through hole 79 includes an insertion hole 71 formed in the flange frame 75 so as to penetrate in the vertical direction and an insertion hole 74a formed in the auxiliary frame 74 in the vertical direction. At this time, the insertion hole 71 and the insertion hole 74a communicate with each other. The through hole 79 is formed with a stop protrusion 71a projecting from the inner circumferential surface and engaging with the flange portion 82a of the transfer frame 82.

The fixing ring 81 is inserted into the through hole 79 of the pressing frame 70 and forms an inner space of the insertion portion 77 together with the through hole 79. The fixing ring 81 is disposed on the upper side of the elastic body 81 and supports the elastic body 81 when the pressing frame 70 is lowered. The fixing ring 72 may be a screw plug of a screw type.

The main frame 78 is disposed under the connecting frame 30 and on the top of the flange frame 75 and is connected to the connecting frame 30, the flange frame 75 and the auxiliary frame 74.

The flange frame 75 is connected to the lower portion of the main frame 78 and has a larger cross sectional area than the main frame 78 and the main frame 78 is connected to the center portion of the flange frame 75. The flange frame 75 is formed with an insertion hole 71 through which the insertion hole 71 is protruded from the inner circumferential surface and a hooking protrusion 71a for hooking the flange portion 82a of the transfer frame 82 . The flange frame 75 may have a rectangular shape.

The auxiliary frame 74 is disposed on the upper side of the flange frame 75 and on one side of the main frame 78 and is connected to the flange frame 75 and the main frame 78. The auxiliary frame 74 is formed with an insertion hole 74a in the vertical direction and a fixing ring 72 can be inserted into the insertion hole 74a. At this time, the insertion hole 71 and the insertion hole 74a communicate with each other, and the transfer frame 82 is movable.

The connecting frame 30 is connected to the upper housing 11 and the pressing frame 70 to provide a passage for connecting the pressing frame 70 to the upper housing 11. [ The connection frame 30 is coupled to the upper surface of the pressing frame 70, and an insertion hole 76a is formed at the center thereof. That is, when the pressurizing frame 70 and the connecting frame 30 are engaged, the pressurizing frame 70 is engaged by engaging the center hole 70a formed on the upper surface of the pressurizing frame 70 and the insertion hole 76a in a state of being in agreement, And the center of gravity of the connection frame 30 can be aligned. Accordingly, the balance of the total load acting on the upper plenizing roll 41 can be maintained, and the steel plate S joining portion W can be effectively flattened.

The steel plate joint processing apparatus according to the present embodiment may further include a control unit (not shown) and a bush 5.

The control unit is connected to a driving unit (not shown), and controls the driving unit such that the pressing frame 70 is moved up and down by a predetermined distance. At this time, a hydraulic cylinder may be used as the drive unit.

The bush 5 is mounted on the outer peripheral surface of the transfer frame 73 in a cylindrical shape, and a through hole through which the transfer frame 73 is movable is formed. At this time, the bush 5 can prevent the transfer frame 73 from being worn due to the friction caused by the movement of the transfer frame 73. The bush 5 may be inserted into the insertion hole 71 and / or the insertion groove 61. The oilless bushing may be used so that the elastic body 81 can function as a lubrication even if there is no oil.

FIG. 6 is a detailed configuration diagram of the roll planeing unit of FIG. 3, and FIGS. 7 and 8 are diagrams illustrating an operational state of the roll planeing unit according to an embodiment of the present invention. 6 to 8, the operation principle of the steel plate joint processing apparatus according to the present embodiment will be described.

Referring to FIG. 6, when the plenyzing roll 40 enters the joint W of the steel plate S and starts to press the steel plate S, the pressure in the vertical direction is controlled by four coil springs 81. The coil spring model used in this embodiment is MISUMI SWY30-35, and the size is 30 [mm] in outer diameter, 21 [mm] in inner diameter, and 35 [mm] in length. The total number of coil springs 81 is used in parallel, and the value of the spring constant is about 0.9 kgf / mm. Since the coil springs 81 are connected in parallel, the total spring constant K is as follows.

The overall spring constant K = K1 + K2 + K3 + K4 = 4 * K1 = 0.9 [kgf / mm] * 4 [EA] = 3.6 [kgf /

7 and 8, a pressing force (a planishing pressure) is applied to the joining portion W while the upper plenizing roll 41 is lowered to start contacting the joining portion W of the steel plate S . When the pressing frame is lowered by the predetermined distance S in the initial state where the distance between the pressing frame 70 and the supporting block 50 is L, the coil spring 81 is compressed by the distance S, .

Considering the previously calculated coil spring constant K and the distance S (about 2.5 [mm]) at which the coil spring 81 is compressed on average, the elastic force Y by the coil spring 81 is calculated as follows .

Elastic force by the entire coil spring Y = 3.6 [kgf / mm] * 2.5 [mm] = 9 [kgf]

Therefore, when the self-weight X of the upper planetary roller 41 and the support block 50 is about 36 kgf and the elastic force Y 9 kgf by the coil spring 81 is added, the pressing force Z is about 45 [kgf]. If the design is carried out in consideration of the thickness of the steel sheet S, the spring constant K, the number of springs, the weight of the upper planetary roller 41 and the weight of the support block 50, It becomes possible to adjust the pressing force Z acting. That is, the pressing force acting on the joining portion W of the steel sheet S can be adjusted to a predetermined value by adjusting the elastic force of the elastic member 80 by moving the pressing frame 70 up and down.

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined in the appended claims and their equivalents. Of course, such modifications are within the scope of the claims.

S: Steel plate W: Joint
5: Bush 10: Housing
11: upper housing 12: lower housing
20: welding unit 21: welding head connecting frame
22: Troll to the upper file 23: Troll to the lower file
30: connection frame 40:
41: upper planetary roller 42: lower planetary roller
50: support block 51: support frame
52: Roll housing 53: Shaft
54: shaft holder 60: bracket
61: insertion groove 70: pressure frame
70a: center hole 71: insertion hole
72: Retaining ring 74: Auxiliary frame
74a: Insertion hole 75: Flange frame
76a: Fitting hole 80: Elastic member
81: elastic body 82: transmission frame
90: cutting unit 91: cutting head connecting frame
92: Ketten head 100: Roll planing unit

Claims (11)

A lower plenizing roller installed at a lower portion of a joining portion where two steel plates are butt-joined and supporting a lower surface of the joining portion;
An upper planetary roller installed on the joining portion and pressing the upper surface of the joining portion;
A support block coupled to the upper planetary roller and disposed above the upper planetary roller to support the upper planetary roller;
An elastic member having one end connected to the support block and providing an elastic force to the support block; And
And a pressurizing frame installed on the support block and spaced apart from the support block and connected to the other end of the elastic member to be elevated by a predetermined distance. The method according to claim 1,
Wherein the pressurizing frame includes an insertion portion having an inner space with an opened lower portion,
Wherein the elastic member is inserted into the insertion portion. The method of claim 2,
The insert
And a fixing ring inserted through the through hole to form the inner space, the through hole having a through hole formed through the pressing frame in a vertical direction. The method of claim 3,
Wherein the support block has an insertion groove formed by recessing an upper surface corresponding to the insertion portion,
And one end of the elastic member is located in the insertion groove. The method of claim 4,
The elastic member
A transfer frame fixedly installed in the insertion groove;
And an elastic body provided between the stationary ring and the transfer frame for providing the elastic force to the transfer frame. The method of claim 5,
Wherein the insertion portion has a locking protrusion protruding from an inner circumferential surface of the through hole,
Wherein one end of the transfer frame is connected to the insertion groove and the other end of the transfer frame is formed between the latching jaw and the elastic body so as to engage with the latching jaw. The method of claim 5,
The elastic body is a cylindrical coil spring,
The transfer frame is hollow cylindrical,
Wherein an inner diameter of the coil spring is larger than an inner diameter of the transmission frame. The method of claim 5,
The steel plate joint portion processing device
And a bush having a through hole through which the transmission frame is inserted, the bush being inserted into the through hole and the insertion groove, the through hole being penetratively formed in the up and down direction. The method according to claim 1,
The support block
A support frame disposed below the pressure frame; And
A plurality of vertically arranged vertical frames arranged between the support frame and the upper flanging roller and having a horizontal frame connected to the support frame on an upper side thereof and a through hole extending in a downward direction from the lower side of the horizontal frame, A roll housing having a frame; And
And a shaft inserted and fixed in the through-hole to rotatably mount the upper planetary roller. The method of claim 9,
The steel plate joint portion processing device
And a shaft holder coupled to the vertical frame and the shaft, the shaft holder fixing the shaft to the vertical frame. The method according to claim 1,
The steel plate joint portion processing device
A driving unit connected to the pressure frame and providing a driving force to the pressure frame so that the pressure frame is moved up and down; And
And a control unit connected to the driving unit and controlling the driving unit such that the pressing frame lifts up by a predetermined distance.

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