Sheet metal bending machine

Abstract

[Problem] To provide a plate material bending device that can perform a bending process on an end portion of a plate material even when the plate material has a bent portion that faces downward. [Solution] The present invention is characterized by having a table for mounting a plate material, a manipulator that clamps the plate material and is controlled so as to advance, retract, and turn, and a bending machine for bending an end portion of the plate material, wherein the table is divided into multiple divided tables, and one or more of the multiple divided tables can be lowered below the upper surface of the other divided tables.

Description

Technical Field

[0001] The present invention relates to a bending device for bending a plate material, and particularly relates to a bending device suitable for bending the end portion of a plate material conveyed on a table downward.

Background Art

[0002] As a plate material bending machine, there is a known one that sandwiches a plate material, also called a panel bender or the like, between a lower die and a pressing die and can bend it downward or upward by ironing (Patent Document 1). In this case, the plate material is conveyed and placed on a table provided on the front side of the bending machine, and this plate material is clamped by a manipulator and supplied to and discharged from the bending machine. In this case, if one end portion of the plate material has a bent portion directed downward, when clamping and turning with a manipulator and trying to bend the other end portion of this plate material, there is a technical problem that the tip side of the one end portion that has been bent first interferes with the upper surface of the table.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] An object of the present invention is to provide a plate material bending device capable of performing a bending process on an end portion of a plate material even if the plate material has a bent portion directed downward.

Means for Solving the Problems

[0005] The sheet metal bending apparatus according to the present invention comprises a table for placing sheet metal, a manipulator that clamps the sheet metal and is controlled to move forward, backward, and rotate, and a bending machine for bending the end of the sheet metal, wherein the table has a plurality of divided tables, and at least one of the plurality of divided tables is capable of being lowered below the upper surface of the other divided tables.

[0006] Here, the bending machine is not limited to bending downwards or upwards, as long as it performs blade bending while clamping the end of the sheet material between the lower die and the presser die. However, the purpose of the present invention is to prevent the previously bent downward end from interfering with the table when bending the other end, at least when bending the other end. The bending machine may clamp the sheet material between the lower die and the presser die and bend the end of the sheet material downwards.

[0007] Accordingly, the method for bending a sheet material according to the present invention is a method for bending a sheet material using the sheet material bending apparatus described in claim 2, characterized by comprising the steps of: clamping the sheet material placed on the table with the manipulator and supplying it to the bending machine; clamping the end side of the sheet material supplied to the bending machine with the lower die and the pressing die, and simultaneously or subsequently bending one end of the sheet material downwards; clamping and raising the sheet material with one end bent downwards with the manipulator and performing a rotational movement; and when supplying the other end side of the sheet material to the bending machine, lowering the dividing table located at one end of the sheet material bent downwards to a position that does not interfere with the bending tip, and then bending the other end of the sheet material downwards. [Effects of the Invention]

[0008] When a downward-facing bend is formed at one end of a sheet of material placed on a table, attempting to rotate the material as is would cause the downward-facing bend to interfere with the lower die, etc. Therefore, a manipulator is used to raise the material, remove it from the bending machine onto the front table, and then rotate it. In this invention, when bending one end downwards, clamping it with a manipulator, and then raising and rotating it, and then bending the other end, the upper surface of the dividing table located at the previously bent portion can be lowered below the upper surfaces of the other dividing tables. As a result, the previously bent portion no longer interferes with the table, and the bending of the other end can be performed continuously. [Brief explanation of the drawing]

[0009] [Figure 1] This shows the state of bending one end of a sheet of material. [Figure 2] This shows the state of the board being rotated. [Figure 3] This shows the board placed on the table with one of its bent ends facing downwards. [Figure 4] This shows the other end of the sheet metal being bent. [Figure 5] The table's plan view is shown. [Figure 6] Examples of shapes formed by bending sheet metal are shown. [Modes for carrying out the invention]

[0010] The bending apparatus and bending method for sheet metal according to the present invention will be described below with reference to the figures. A schematic plan view of the bending machine is shown in Figure 5, and the flow of bending sheet metal is shown in Figures 1 to 4. As shown in Figure 5, the bending machine 30, such as a bending machine, has tables 14a to 14d on the front side, and the manipulator 20 is controlled to move forward and backward along the center of these tables 14a to 14d. This example includes a side table 15 for loading and / or unloading sheet metal onto a table located on the front side of the bending machine 30.

[0011] As shown in Figure 1, the plate material 1 is held between the lower die 11 and the pressing die 12, and is bent upward or downward by a blade using a bending machine 30 (not shown). Figure 1 shows an example in which one end of the plate material 1 is bent downwards to form the first bent portion 1a.

[0012] The board material 1 is placed on the table and clamped by the upper clamper 23a and the lower clamper 23b provided on the manipulator 20. In this embodiment, a C-type manipulator is used, in which the main body 21 is controlled to move forward and backward along the base 13, and the tip of the upper arm has a swivel section 22 consisting of a swivel mechanism.

[0013] Once the first bend 1a is formed at one end of the sheet metal, the clamping die 12 rises as shown in Figure 2, and the sheet metal is raised while being held in place by the upper clamper 23a, and is also pulled towards the user from the bending machine side. In this process, the plate may be held between the upper clamper 23a and the lower clamper 23b, raised, pulled forward, and rotated. This allows the first bending section 1a to rotate without interference from the bending machine or the table surface.

[0014] Figure 3 shows the state after the sheet metal has been rotated 180° and the other end of the sheet metal has been fed to the bending machine. The table is divided into multiple divided tables (14a to 14e), such as the first divided table 14a, the second divided table 14b, the third divided tables 14c, 14d, 14e, and so on. Furthermore, as shown in Figure 4, for example, the upper surface of the second divided table 14b is lower than the upper surfaces of the other divided tables, so that the first bent portion 1a does not interfere with the upper surface of the second divided table 14b. Each divided table is independently controlled for lowering and raising by a cylinder or the like (not shown) from other divided tables. According to this, the divided table corresponding to the position having the bending part on the lower side can be lowered according to the size of the plate material. According to this, as shown in FIG. 4, the second bending part 1b can be formed on the other tip side of the plate material.

[0015] When using the bending device according to the present invention, for example, as shown in FIG. 6, bending parts 1c and 1d can be formed toward the upper side of the plate material 1, and bending parts 1a and 1b that are reversely bent to the lower side thereof can also be formed.

Industrial Applicability

[0016] When performing bending on both sides of the plate material using the bending device according to the present invention, it is possible to prevent the end part of the bending part that has been bent first from interfering with the table, so the degree of freedom in bending the plate material is high. Therefore, it can be widely used as a bending device that can also handle complicated bending of the plate material.

Explanation of Signs

[0017] 1 Plate material 1a First bending part 1b Second bending part 11 Lower die 12 Pressing die 13 Base part 14a Divided first table 14b Divided second table 20 Manipulator 21 Main body part 22 Swivel part 23a Upper clamp 23b Lower clamp 30 Bending machine

Claims

[Claim 1] A table for placing boards, The aforementioned plate material is clamped, and a manipulator is controlled to move forward, backward, and rotate. The machine includes a bending machine for bending the end of the aforementioned plate material, The aforementioned table has partitioned tables which are divided into multiple parts. Of the aforementioned multiple partition tables, at least one is capable of descending below the upper surface of the other partition tables. The bending machine described above is a method for bending sheet metal using a sheet metal bending device that holds the sheet metal between a lower die and a pressing die and bends the end of the sheet metal downwards, The steps include: clamping the plate material placed on the table with the manipulator and supplying it to the bending machine; The bending machine is used to bend a sheet metal, and the end of the sheet metal is clamped between the lower die and the pressing die. Simultaneously or afterward, one end of the sheet metal is bent downwards. The steps include: clamping and lifting the plate material, of which one end is bent downwards, using the manipulator, and performing a rotational motion; When supplying the other end of the sheet material to the bending machine, the process includes a step of lowering the dividing table located at one end of the sheet material that has been bent downwards to a position where it does not interfere with the bending tip. A method for bending a sheet material, characterized by comprising the step of bending the other end of the sheet material downwards.

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