KR20100103166A - Method and apparatus of the continuous levelling machine for doubly curved formed sheet metals - Google Patents

Abstract

PURPOSE: A device and a method for correcting a continuous plane of a metal sheet with double curvature are provided to simultaneously and continuously correct vertical and horizontal curvatures of a metal sheet. CONSTITUTION: A device for correcting a continuous plane of a metal sheet with double curvature comprises multiple roll sets(610,620). The roll sets are composed of multiple rolls(630). One roll set is not at right angles to the other roll set. The roll sets are arranged at an upward angle or a downward angle. The adjacent roll sets have double curvature.

Description

Continuous planar straightening apparatus of thin plate with double curvature and its method {Method and apparatus of the continuous leveling machine for doubly curved formed sheet metals}

The present invention relates to a continuous planar straightening device of a thin plate having a double curvature and a method thereof, and more particularly, a single straightening operation for the longitudinal and transverse double curvature caused by spring back after forming a fine pattern on the thin plate The present invention relates to a continuous planar straightening device of a thin plate having a double curvature which is simultaneously removed through a straight shape to be corrected. The present invention also relates to an apparatus and a method capable of correcting the longitudinal and transverse curvatures that may occur after molding in one process after molding.

When the fine pattern is formed on the large-area thin plate, the thin plate has curvature in the longitudinal direction and the width direction due to the molding residual stress and the spring back generated during the fine pattern forming. Therefore, it is important to secure the flatness of the thin plate in order to use the thin plate formed with the fine pattern as the existing thin plate.

1 is a schematic diagram of a calibration process for straightening a thin sheet material in a roll state. Since the thin plate wound on the roll has the curvature of the roll, it is difficult to use it as it is. Therefore, in order to calibrate the thin plate 110 having the curvature in a planar shape, as shown in FIG. 1, five rolls, that is, two roll sets 120 are generally calibrated.

FIG. 2 is a schematic view of a thin plate molded with a fine pattern through a general mold forming method, and FIG. 3 is a detailed view of the molded thin plate shown in FIG. 2. As shown in FIG. 2, in forming a fine pattern on a thin plate, the mold may be molded using the progressive mold 210 or the roll mold 220. In the thin plate 230 formed of the molds 210 and 220, a plurality of fine patterns are formed on the surface thereof.

In addition, as shown in FIGS. 2 and 3, the molded thin plate 230 may have a bidirectional curvature in the K1 and K2 directions along the shape of the fine pattern. That is, the molded thin plate 230 has different longitudinal curvatures K1 and lateral curvatures K2 along the shapes of the fine patterns. Looking at the cross-section of the formed thin plate 230, it has a longitudinal curvature K1 for the X-Z plane 231, and a transverse curvature K2 for the Y-Z plane 232. This thin plate having double curvature in the longitudinal and transverse directions is unreasonable in practical use. Therefore, in order to use a thin plate having a double curvature, a corrective work in both directions (vertical and transverse directions) is required.

4 and 5 are a perspective view and a front view of the concept of correcting the molded thin plate shown in Figure 3 using a conventional planar calibration device. 4 and 5, the conventional planar calibration device 400 is composed of five rolls, that is, two roll sets (410, 420). The roll sets 410 and 420 are composed of one upper roll and two lower rolls, respectively, and the formed thin plate 230 passes between the upper roll and the lower roll to perform a corrective operation. The planar straightening device 400 was used to straighten the thin plate 110 material wound in a roll shape as shown in FIG. 1, or the thin plate 230 material which is molded to have a curvature as shown in FIG. 3.

However, in the conventional planar straightening device 400, upper and lower rolls are arranged such that vertical loads corresponding to the width direction of the molded thin plate 230 are applied to the molded thin plate 230. That is, the traveling direction of the formed thin plate 230 and the longitudinal direction of the upper and lower rolls are arranged to be orthogonal when viewed from the top or the bottom. Therefore, the longitudinal curvature K1 formed in the width direction of the formed thin plate 230 can be corrected, but the correction of the transverse curvature K2 formed in the longitudinal direction of the molded thin plate 230 is impossible. That is, in order to achieve a perfect plane, there is a disadvantage in that the calibration operation for the transverse curvature K2 needs to be performed once more.

In addition, in order to correct the lateral curvature K2, a procedure for changing the injection direction of the molded thin plate 230 to the planar straightening device 400 must be performed, so that the process can be performed directly after progressive molding or roll molding. After cutting the formed thin plate 230 to a certain length, it is necessary to perform a calibration operation for the double curvature, respectively. That is, the conventional planar straightening device 400 was not able to continuously perform a straightening operation after molding through a mold or the like.

Therefore, the present invention has been made to solve the problems of the prior art as described above, the roll direction of the thin plate having a double curvature and the longitudinal direction of the roll is not orthogonal when viewed from the top or bottom, each roll set is mutually It is an object of the present invention to provide a continuous planar straightening apparatus for a thin plate having a double curvature capable of simultaneously correcting the longitudinal and transverse curvatures of the thin plate by arranging them to maintain different angles.

In addition, the present invention provides a double curvature capable of simultaneously and simultaneously correcting the longitudinal and transverse curvatures directly after mold molding (progressive or roll molding) through the proper arrangement of rolls and roll sets as described above. Another object of the present invention is to provide a continuous planar straightening device having a thin plate and a method thereof.

The present invention relates to a device for straightening a material having a double curvature in a longitudinal direction and a transverse direction in a planar form, comprising a plurality of roll sets each configured and arranged in a plurality of rolls for straightening the material, the plurality of roll sets The advancing direction of the roll and the longitudinal direction of the roll are not orthogonal when viewed from the top or the bottom, and are arranged at an upward angle (α) or a downward angle (β) with respect to the advancing direction of the material, and adjacent roll sets have different upward angles ( α) or downward angle β.

Adjacent roll sets of the present invention have an upward angle α or a downward angle β that are perpendicular to each other, and the upward angle α and the downward angle β are preferably 30 ° to 60 °, respectively.

The present invention may further include a plurality of pairs of guide rolls disposed between the input and discharge lines of the material and the plurality of roll sets, respectively, to guide the movement of the material.

The present invention is a planar calibration method using the apparatus as described above, in the longitudinal and transverse direction while moving the material along a plurality of roll sets having a different upward angle (α) or downward angle (β) between adjacent roll sets It characterized in that it comprises a calibration process to remove the double curvature at the same time to correct in a planar form.

The calibration process of this invention can be corrected by successively carrying out the longitudinal and transverse double curvatures resulting from progressive molding or roll molding in a subsequent process after molding.

The present invention arranges the longitudinal and transverse curvatures of the thin plate simultaneously by arranging the roll direction of the thin plate having a double curvature and the longitudinal direction of the roll not to be orthogonal when viewed from the top or the bottom, so that each roll set maintains a different angle. There is an advantage to calibrating.

In addition, the present invention has the advantage that the longitudinal and transverse curvature directly generated after the mold molding (progressive or roll molding) through the appropriate arrangement of the roll and roll set as described above can be simultaneously and simultaneously corrected after the mold molding have.

In the following, with reference to the accompanying drawings, a preferred embodiment of a continuous planar straightening device of a thin plate having a double curvature and a method according to the present invention will be described in detail.

FIG. 6 is a conceptual diagram illustrating a configuration relationship of a continuous planar straightening device of a thin plate having a double curvature according to an embodiment of the present invention, FIG. 7 is a perspective view of the planar straightening device shown in FIG. 6, and FIG. It is a conceptual diagram of correcting a thin plate having a double curvature using the planar calibration device shown in FIG.

As shown in Figs. 6 to 8, the continuous planar straightening device 600 of the thin plate having the double curvature according to this embodiment includes a plurality of roll sets 610 and 620 having a proper arrangement relationship with each other. It is composed of a plurality of pairs of guide rolls 630 which are disposed between the input and discharge lines of the molded thin plate 230 having curvature and the roll sets 610 and 620 to guide the movement of the formed thin plate 230. .

The roll sets 610 and 620 are each composed of one upper roll and two lower rolls, and the upper and lower rolls are arranged in parallel with a predetermined interval therebetween. Thus, the formed thin plate 230 passes between the upper roll and the lower roll so that a corrective operation is made.

The roll sets 610 and 620 of this embodiment are not perpendicular to the traveling direction of the molded thin plate 230 and the longitudinal direction of the roll when viewed from the top or the bottom thereof, and the upward angle with respect to the traveling direction of the molded thin plate 230. The rolls are arranged at α) or downward angle β. In addition, adjacent roll sets 610 and 620 are arranged to maintain different angles, such as an upward angle α or a downward angle β.

In this embodiment, the planar straightening device 600 removes only a curvature in one direction (longitudinal or transverse direction) of the formed thin plate 230 when the traveling direction of the formed thin plate 230 and the longitudinal direction of the roll are orthogonal to each other. In order to overcome the disadvantages, it is arranged to remove the curvature for both directions (vertical and transverse directions) at the same time by differently arranged in an upward angle (α) or downward angle (β) that is not orthogonal to each other. In this case, it is preferable that the adjacent roll sets 610 and 620 have an upward angle α or a downward angle β that forms a right angle with each other.

For example, when the roll set 610 of the front end is arranged at a 45 degree upward angle α, and the roll set 620 of the rear end is arranged at a 45 degree downward angle β, the roll set of the front end is initially ( 610, the longitudinal and transverse curvatures of the formed thin plate 230 with respect to the direction are removed by the vertical load in the 45 ° upward angle α direction, and then 45 ° by the roll set 610 at the rear end. The vertical load in the downward angle α direction eliminates the longitudinal and transverse curvatures of the formed thin plate 230 with respect to that direction. That is, vertical loads are applied in different directions between the adjacent roll sets 610 and 620 to simultaneously remove the longitudinal and transverse curvatures to correct the plane shape. In this case, the roll set 610 may be arranged by adjusting the upward angle α or downward angle β within a range of 30 ° to 60 °, respectively.

In this embodiment, the plane calibration can be performed in one calibration operation with two calibration operations which were conventionally performed in different directions for calibration in a planar form. In addition, this embodiment can be corrected by continuously performing the double curvature in the longitudinal and transverse direction directly after the progressive molding or roll molding as shown in Figure 2 in a subsequent process after the mold molding. That is, in this embodiment, the double curvature is formed by one straightening process that is continuously performed in a subsequent process after mold molding, without cutting the molded thin plate 230 to a predetermined length to remove the double curvature, and going through two straightening steps. Can be removed.

In the above description, the technical details of the continuous planar correction apparatus of the thin plate having the double curvature of the present invention and the method thereof have been described together with the accompanying drawings, which illustrate the best embodiment of the present invention by way of example. no.

In addition, it is obvious that any person skilled in the art can make various modifications and imitations within the scope of the appended claims without departing from the scope of the technical idea of the present invention.

1 is a schematic diagram of a calibration process for straightening a thin sheet material in a rolled state,

2 is a schematic view of a thin plate formed with a fine pattern through a general mold forming method,

FIG. 3 is a detailed view of the molded thin plate shown in FIG. 2,

4 and 5 are a perspective view and a front view of the concept of correcting the molded thin plate shown in Figure 3 using a conventional planar calibration device,

6 is a conceptual diagram showing the configuration of the continuous planar straightening device of a thin plate having a double curvature according to an embodiment of the present invention,

FIG. 7 is a perspective view of the planar calibration device shown in FIG. 6;

FIG. 8 is a conceptual diagram of calibrating a thin plate having a double curvature by using the planar calibration device shown in FIG. 6.

  ♠ Explanation of symbols on the main parts of the drawing ♠

230: thin plate 600: plane calibration device

610, 620: Roll set 630: Guide roll

Claims (6)

In the device for straightening the material having a double curvature in the longitudinal and transverse direction in the form of a plane, Comprising a plurality of roll sets each consisting of a plurality of rolls to calibrate the material, The plurality of roll sets are not perpendicular to the traveling direction of the material and the longitudinal direction of the roll when viewed from the top or the bottom, are arranged at an upward angle (α) or downward angle (β) with respect to the traveling direction of the material, A continuous flattening device of a thin plate having a double curvature, characterized in that adjacent roll sets are arranged at different upward angles (α) or downward angles (β). The method according to claim 1, And the adjacent roll sets have an upward angle α or a downward angle β perpendicular to each other. The method according to claim 2, The upward angle (α) and downward angle (β) is a continuous planar correction device of a thin plate having a double curvature, characterized in that each of 30 ° ~ 60 °. The method according to claim 3, Continuous flat correction device of a thin plate having a double curvature, characterized in that it further comprises a plurality of pairs of guide rolls disposed between the input and discharge lines of the material and the plurality of roll sets to guide the movement of the material. . A plane calibration method using the apparatus according to any one of claims 1 to 4, Simultaneously removing the double curvature in the longitudinal and transverse directions while moving the material along a plurality of roll sets having different up angles (α) or down angles (β) between the adjacent roll sets to correct them in a planar shape. A continuous planar straightening method of a thin plate having a double curvature, characterized in that it comprises a calibration process. The method according to claim 5, The straightening method is a continuous flat-calibration method of a thin plate having a double curvature, characterized in that the longitudinal and transverse double curvature caused by the progressive molding or roll molding is continuously performed in a subsequent process after the molding.

Images