JPS5997723A - Method and device for forming sheet metal into box shape - Google Patents

Abstract

PURPOSE:To form automatically and accurately a polygonal box shape by arranging parallelly blocks each of which performs one bending process of a sheet metal, and bending the metal simultaneously by both blocks arranged bilaterally at the left and right side ends, and moving the bending process to the central side in sequence. CONSTITUTION:A sheet metal 10 is set at a prescribed position, and respective blocks B', A', A, B for performing one bending process each are arranged bilaterally and positioned. Next, upper rolls 6 of all the blocks are lowered and fixed at supporting points 15 by pins 12 respectively, then bending rolls 20 of the blocks B, B' are rotated around the supporting points 15 together with arms 13 respectively to finish simultaneously each bending process I by setting both ends of the metal 10 upright. After taking out and raising said pins 12 to restore them to the original positions, the rolls 20 of the blocks A, A' are rotated respectively together with the arms 13 in approximately the same manner as the process I to finish the process II, thereby a box shape having a rectangular cross section is formed. Thus a sheet metal 10 is formed into a polygonal box shape by a single operation.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method and an apparatus for forming a rectangular sheet metal into a shape using a bending roll device ift.

Conventionally, when forming a box-shaped product from sheet metal, a bending press machine is usually used. However, the press bending process had disadvantages in that it was easy for products to be damaged, required several bending operations, and increased the size of the machine.

On the other hand, bending roll machines for bending KA plates into cylindrical or conical shapes are well known. Furthermore, a technique is also known in which a long strip is gradually molded into a predetermined fi'l++fu shape by passing through a number of roll stands, and then cut into a desired box-shaped product.

However, it is difficult to efficiently manufacture box-shaped products of various sizes and sizes from sheet metal using these conventional devices.
This method is inefficient and involves high costs for products and equipment.

The present invention was made in view of the above circumstances, and provides a method and a structure for automatically and accurately forming a sheet metal into a box in a single operation. The purpose of this invention is to provide a compact box forming processing device that is simple and has a small number of parts.

Next, one embodiment of the present invention will be described based on the drawings. FIG. 1 is a diagram illustrating the principle of a bending device according to an embodiment of the present invention.
゛The bending device 1 of this embodiment has B', A' from the left side of the figure.
It consists of four bending blocks arranged in the order of , A, and B. The B' block is mainly installed on the 6' of the stand frame, the A' block is mainly installed on the AL frame, and the A block is installed on the 6' side of the stand frame. Mainly in the a frame, B block mainly in the b frame, device 1ii! has been done.

Each of the frames A', a', a, and b can be installed and fixed in advance on the bottom plate, etc., but in this embodiment, as shown in FIG. position IF (M:r
4 g, and is positioned by a stopper 5. Therefore, by manipulating this, the interval between each block can be freely determined.

In this embodiment, the B/ and A' blocks and the A and B blocks are configured in a 4':I configuration so as to have a symmetrical structure and operation. Also, the basic e:j of each block
Since k= is the same as a house, we will mainly explain the configuration of A and B blocks here.

First, the A block will be described. 6 is an upper roll whose operating portion is connected to the tip of a piston rod 9 of an air cylinder 8 via an arm 7.

In this case, since the 'A' block and the A' block are adjacent to each other and operate at the same time, the operating section of the upper roll can be made common to the A and A' blocks.

Further, this operating section may be integrally connected to the frame a, or may be configured to be operated at a predetermined position by the device ii/Lt on a separately provided frame. Further, the restoring position of the roll 6 and its operating portion is as follows:
Even if the sheet metal 107 becomes a bent shape as shown in FIG.

In addition, pin holes 11.11 are bored at both ends of the ascending ring 6, as shown in FIG. FIG. 3 shows a mechanism for fixing the upper roll 6 in a predetermined position by fixing pins 12,12.

Reference numeral 13 denotes a rotating arm, one end of which is pivoted to the end of a bracket 14 provided at the tip of the frame a in the A block, forming a fulcrum 15. The other end of the rotating arm 13 is connected to the tip of a piston rod 18 of an air cylinder 17 via a link mechanism 16. The air cylinder 17 is held by the brake a via a connecting arm 19.

20 is a curved Gf roll, both ends of which are connected to the above-mentioned rotating arm 13.
．． The pivot arm 13.13 is fixedly or rotatably mounted adjacent to the fulcrum portion 15.15 of the arm 13, and is configured to rotate together with the rotating arm 13.13 about the fulcrum portion 15.15.

Further, as shown in FIG. 3, an identification pin 12.12 for the roll 6 is loosely inserted through the fulcrum portion 15.15. One of these fixing pins 12.12 is attached to the tip of an air cylinder 21 and a histone quad 22 provided in the direction in which the pin projects, via a stopper member 23, and the other fixing pin is attached to a stopper arm 22. and link device 25
It is connected to the body of the air cylinder 21 via.

Reference numeral 26 denotes a control plate for controlling the fixing mechanism of the fixed pins 12 and 12, the other end of which is fixed to the frame a, and one end of which faces a predetermined position between the tip of the air cylinder 21 and the frame a. The piston rod 22 is configured to loosely pass through one end of the control plate 26.

The sheet metal lO is placed on the bending p-ru 2o, but the upper o-
A/6 lightly contacts the surface of the sheet metal 1 () or is fixed with a slight interval.

Incidentally, Sl is the upper setting position rr of the cylinder = knowledge sensor.

S2 is a lower setting position sensing sensor.

Next, block B will be explained.

In this case, the upper roll 6 and its operating portion are connected to the frame 6.
are mounted on a frame b1 that is integrally arranged side by side with connecting members 27 and 28. Further, the arm 7 connecting the upper roll 6 and the piston rod 9 is connected to a bracket 29 which is formed long and is pivotally attached to the tip of the frame b1, and the arm 7 is connected to a bracket 29 which is formed long and is pivoted to the tip of the frame b1.
tlV! to operate using the shaft attachment part 30 of No.9 as a fulcrum! has been completed.

Further, the fulcrum portion 15 of the rotating arm 13 and the li'fJ fixed pin] 2 are provided directly at the tip of the frame 6 without using a bracket as in the A block. The other structures are the same as those of the A block, so the explanation will be omitted.

Although not shown in the drawings, each cylinder in each block is equipped with an upper setting position sensor S1 and a lower setting position sensor S2, and the output of each sensor is given to a control device in the operation panel, which controls the The operation of each cylinder is controlled by the output of the device.

Next, the operation of this embodiment apparatus and the processing method of the present invention will be explained.

First, a rectangular sheet metal 10 cut into a certain shape is placed on the bending rolls 20 of all blocks, and the position is determined. The positioning of the sheet metal 10 is determined by using the unevenness, holes, crests, etc. formed in advance on the sheet metal as guides, or by lightly holding the sheet metal.

Next, when the start button set on the operation panel is turned on, the upper rolls 6 of all the blocks are lowered and stopped at a predetermined position on the sheet metal lO whose position f#: has been determined. At the same time, the first
The timer has started, and when the upper roll 6 is lowered to a predetermined position, the fixed pins of all blocks are activated and inserted into the pin holes 11, 11 of the upper roll.

In this case, the fixed pin 12 on the tip side of the piston rod 22 moves forward due to the protrusion of the piston rod 22 and is fitted into one of the pin holes 11. At the same time, the stop member 23 prevents the piston from moving forward, causing the cylinder 21 to retreat from the control plate 26. At this time, the other fixing pin is fixed by the linkage f25 connected to the cylinder 21. At the same time, the stop arm 24 stops the cylinder 21 from moving back in place.

After the fixed position of the cylinder 21 is determined w1 by a sensor or the like, the bending air cylinders of blocks B and B' are activated simultaneously. As a result, the bending rolls 20 of B and B'puk begin to rotate and rise about the fulcrum part 15 together with the rotating arm A13. Thus, the bending step 1 of the sheet metal 10 shown in FIG. 1 is performed at exactly the same time in the 'B' and B' blocks.

The bending angle (shape) in this case can be freely selected depending on the elevated position of the bending roll 20, that is, the upper setting conditions of the piston. In the above example, the sheet metal 10 of blocks B and B' is different from the sheet metal 10 of blocks A and A'! The sheet metal 10 is bent at the center of the fulcrum part 15 by the diameter of the gouging roll 6 until it stands vertically.

When it is detected that the piston has reached the upper setting position, the second timer is started and at the same time the FIIT if
The roll 20 and piston descend. When it is detected that the piston has descended to the lower regular position, a bottle extraction operation is performed to extract the fixed bottles 12, 12 from the upper roll 6 of the BSB' block by setting the second timer.

At this time, insert the machine 11 in the opposite direction to the insertion of the identification bottle 12°12.
When the upper roll fixing cylinder 21 is locked to the control plate 2G, completion of pin removal is detected. After the detection, only the upper rolls 6 of blocks B and B' are restored to their original positions and raised. At the same time, a third timer is started.

When the upper roll 6 of the B, B' block returns to the rear position ii"e, the third timer is set, this time A, A'
The bending roll 20 of the block rotates and rises together with the rotating arm 13, and the above-mentioned bending process is performed! A similar action.

In the A' block, the bending process (2) shown in FIG. 1 is carried out at the same time.

Therefore, in this actual gun □ example, it is bent at right angles in the bending process □, so that a cylindrical Xi shape with a rectangular cross section is formed as shown in FIG. Also, by setting the fourth timer, the upper roll 6 of the A and A' processes is
also rises to the restoring position, completing the entire process. The obtained product can be easily extracted from this device 1 manually or mechanically.

Note that the sheet metal lO of books A and A'' enters the bending process ■ with the bending process of the bending process T that has already been completed as it is at the tip, so the sheet metal lO of books B and B' is The restoring position is preferably at a high position so as not to interfere with the bending process (2). However, even if the restored position of the A and A' four-rack Ueda-ru 6 is within the box-shaped portion of the sheet metal 10, as shown in FIG. do not have.

As explained above, according to the processing method and apparatus of the present invention,
For example, the bending shape of the four corners of a rectangular box shape can be freely determined, and the width and length of the side walls can also be adjusted by moving each bending block individually and fixing it with a stopper at an arbitrary dimension position, so it can be made into a variety of dimensions. can be selected, and can be automatically molded in just a few operations. □ Furthermore, the structure of the entire device 1"X is simple and the number of parts is small, and the device can be provided compactly and at low cost.

Furthermore, since the left and right sides of the sheet metal are bent at the same time, there is no need for a strong press to position the sheet metal, and it can be simply positioned using a guide such as a hole near the center of the sheet metal or a light hold. This is sufficient, and since the device of the present invention does not require pressing near the bend,
The sheet metal does not stretch, and since it is a roll type, there is no damage to the product.

Note that even if the sheet metal has a drawing pattern or unevenness, it will not be affected by freely selecting the roll shape and can be bent freely.

[Brief explanation of drawings]

Fig. 1 is a diagram explaining the borrowing and principle of the bending device rt according to the embodiment of the present invention, Fig. 2 is a sectional view showing the N relationship between the guide shaft 4 and each frame, and Fig. 3 is a diagram showing the upper roll 6 in a predetermined position. FIG. 12 is a diagram illustrating a mechanism for fixing with fixing pins 12 and 12. Note that arrows indicate the direction of movement of each member.

Claims (1)

[Claims] 1) A block capable of performing a bending process at a predetermined position on a sheet metal is used as a bending block, and a plurality of these bending blocks are appropriately arranged in parallel to perform left and right corresponding bending. The blocks perform a bending process at the same time, and this simultaneous bending process is sequentially transferred from the bending block corresponding to 411 on the end f2Is side to the corresponding bending block on the center side to form a polygonal cylindrical box shape of the sheet metal. A box-forming processing method for sheet metal, characterized by forming a box. 2) - an upper roll whose bending block is movable up and down, an N drive control device thereof, an upper row/I/identification device which fixes the upper rail at a predetermined position on the upper surface of the sheet metal, and a drive control device thereof; A bending roll that uses the upper roll fixed at a predetermined position as a fulcrum and rotates and rises to a predetermined position while bending the sheet metal placed around it, and its bending! 511 force control device; an automatic control device that arranges the bending blocks in parallel as appropriate and performs the bending process simultaneously on the left and right corresponding bending blocks; A control device 6 for controlling sheet metal, characterized in that the simultaneous bending process is automatically transferred from the corresponding bending block on the end side to the corresponding bending block on the center side in order; 1□ control device 6 2i'j forming processing device tt.