JPS6030526A - Method of press work - Google Patents

Abstract

PURPOSE:To make positioning simple and to improve accuracy of bending position by providing plural holes on a bending line of a flat plate, and after inserting plural pins into the holes, bending the flat plate by a punch. CONSTITUTION:When bending a flat metallic plate 3, a pin 9 is moved to make the interval of holes 4, 5 and interval of pins 8, 9 equal. Then, the pins 8, 9 are inserted into holes 4, 5 of the flat metallic plate 3. Under this condition, a punch 1 is moved in the direction of arrow (a) to apply pressure to the flat metallic plate 3, and bending work is performed. At this time, the pins 8, 9 are pressed by the punch 1 and go into a die 6. When the punch 1 is moved in the direction of arrow (b), the pins 8, 9 return to original position. Thus, a flat metallic plate 3 bent along a bending line 17 is obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a press working method for bending a plastic flat plate such as a flat metal plate.

Conventionally, press brakes have been mainly used when pressing and bending flat metal plates and the like.

The press brake is a gui (also called bevel type),
It is equipped with a punch (also called a bevel upper type) and a rear setting ruler.

When bending a flat metal plate, first the rear setting ruler is set at a predetermined position related to the bending position (bending line) of the flat metal plate. Next, the side edge of the metal flat plate is passed between the goo and the punch and brought into contact with the rear setting ruler, and then pressure is applied to the metal flat plate with the punch and the goo to bend the metal flat plate. There is. If the bending line of the flat metal plate is not parallel to the side edge of the flat metal plate, that is, if the side edge of the flat metal plate is brought into contact with the rear setting ruler, and the bending line is not parallel to the rear setting ruler, use another ruler. The metal plate is placed on a press brake, and the metal plate is set at a predetermined position using the other ruler and bent.

Therefore, if the bending line is not parallel to the side edge of the flat metal plate, there is a drawback that another ruler must be newly installed, and if there are many bending positions in various directions, it will be necessary to set a new ruler to obtain the desired bending accuracy. There was a drawback that adjusting the ruler was extremely complicated. Also, even if the original bending line is parallel to the side edge of the flat metal plate, if the bending process is performed with only part of the side edge of the flat metal plate in contact with the rear setting ruler, an error will occur in the bending position. It also had

Further, when the metal flat plate is thin, there is a drawback that the metal flat plate is bent by the force of bringing the metal flat plate into contact with the rear setting ruler, and is bent at a position different from the original bending line.

The present invention was made in view of the above-mentioned drawbacks, and involves providing a plurality of holes on the bending line of a plastic flat plate such as a metal flat plate, and inserting a plurality of bottles provided at the bottom of the groove of the die into each of the plurality of holes. A press working method in which the plastic plate is bent with a punch after insertion, thereby easily and reliably bending the plastic plate at a predetermined position without the need to set the position of the plastic plate with a setting ruler. The purpose is to provide.

The present invention will be explained below using examples.

FIG. 1 is a perspective view showing a part of the press brake used in the present invention, and FIG. 2 is a side view thereof. Identical parts in FIGS. 1 and 2 are designated by the same reference numerals.

In FIG. 1 and FIG. 52, the punch 1 and die 6 are fixed at predetermined positions on a press brake (not shown).

The punch 1 moves up and down in the directions of arrows a and b in conjunction with a press start switch (not shown), and moves so as to substantially contact the die 6 at its lowest position.

The bottles 8 and 9 are held in a hole provided in the V-groove bottom 10 of the die 6 and in the groove 7 so as to be able to move in and out, and when no suppressing force is applied, they protrude beyond the rings 14 and 15 of the groove 16. is in a state of Further, as will be described later, the bottle 9 moves laterally within the groove 7 in conjunction with the bolt 13. The bolt 13 engages with the Nand 11 fixed to the die 6 and
go in and out. A desired bending line 17 is formed on the flat metal plate 3.
A hole 4.5 is provided at the top.

The process of bending the flat metal plate 17 will be described below.

First, the bins 9 are moved to make the spacing between the holes 4.5 and the bins 8.9 the same. To do this, first rotate the fixing nut 12 counterclockwise to release the bolt 13 from the locked state. Next, by rotating the bolt 13, the bottle 9 is moved to a predetermined position. Thereafter, the nut 12 is rotated in the δ1 direction, the bolt 13 is locked, and the bin 8.9 is fixed at the same spacing as the hole 4.5.

Next, the bottles 8 and 9 are inserted into the holes 4 and 5 of the metal flat plate 3. At this time, the inner diameter of the hole 4.5 is slightly larger than the outer diameter of the bottles 8, 9, so the line connecting the centers of the bottles 8, 9 coincides with the bending line 17, and the tip 2 of the punch 1 bending line 1
7 and the groove bottom 40 of the die 6 are aligned on the same plane. In this state, the punch 1 is moved in the direction of arrow a to apply pressure to the metal flat plate 3 and bend it. At this time, bin 8,
9 enters into the die 6 while being held down by the punch 1. Thereafter, when the punch 1 is moved in the direction indicated by the arrow, the bin 8.9 returns to the position shown in Figure 2 of the plane I. As a result, bend line 1
A metal flat plate 3 bent along 7 is obtained.

FIG. 3 is a cross-sectional view of the die 6 of FIG. The same parts as in FIG. 1.2 are given the same reference numerals.

Inside the die 6, a cavity and a hollow are provided. The bottle 9 is in a state of protruding from a hole provided in the upper part of the rectangular parallelepiped container 19, and a force is applied upwardly (as viewed from the direction of the drawing) by a spring 20. Since the flat plate portion provided at the bottom of the bottle 9 is larger than the inner diameter of the hole, the bottle 9 is held in the state shown in FIG. The bottle 8 is held within the cavity 21 with an upward force applied by a spring 22. 23 is a bolt for sealing the spring 22. Further, a pole 113 is rotatably attached to the container 19 by a lever bed 18. Natsu 1
1 is fixed to the main body 25 of the die 6, and the fixing nut 1
2 moves along the bolt 13 by rotating itself.

By bringing the fixing nut 12 into tight contact with the nut 11, the bolt 13 is locked.

The operation for moving the bin 9 will be described below.

First, the fixing nut 12 is rotated counterclockwise to move the fixing nut 12 away from the nut 11.

This unlocks the bolt 13. Next, when moving the bottle 9 to the bottle 8 side, bolt 13
Rotate clockwise.

As a result, the bolt 13 moves to enter the inside of the main body 25, and the container 19 moves toward the bottle 8, that is, the bottle 9.
moves to the bin 8 side. When the bottle 9 reaches a predetermined position, the rotation of the bolt 13 is stopped. Next, fixing nut 1
2 clockwise and move it until it touches the oak) 11. As a result, the bolt 13 is in a closed state, that is, the bottle 9 is in a fixed state. In addition, bottle 8.9
When a force is applied from above, they descend against the force of springs 22 and 20, respectively, and move into the cavity or into the container 19.

When the force is removed, the state returns to the state shown in FIG. 3 again.

FIG. 4 shows a die 401 used in the press working method of the present invention.
FIG. 5 is a front view thereof. Figure 4,
Identical parts in FIG. 5 are designated by the same reference numerals. In the die 401 shown in FIGS. 4 and 5, a plurality of bottles 402, 403, 40.4 are provided in the groove bottom 405 instead of moving the bottles. Bins 402, 403, 404. spring 411
,411'.

411 is a cavity 41o provided inside the die 401.

Bolts 412, 412', 41 in 410', 410''
The flat plate portions 413, 413', 413'' of the bottles 402, 403 and 404 are sealed with springs 411 and 413'', respectively.
A force is applied upwardly (in the direction of the drawing) by 411', 411'', and the bins 402, 403, and 404 behave similarly to the bin 8 shown in FIG. Through holes 406, 407° 406', 407', 406", 4 reaching cavities 41O2410', 410
07" is provided. When bending the flat metal plate 3 shown in FIG. 1 using the die 401, the hole 4.5 is
, 403, 404 at the same interval as at least two bins. If the width of the flat metal plate 3 is narrow, holes 4.5 are provided at the same distance as the distance between the bins 402 and 403. When the width of the flat metal plate 3 is wide, holes 4 and 5 are provided at the same distance as the distance between the bins 402 and 403 in order to improve bending accuracy.

When using the bins 402 and 403 when folding, the bin 403 gets in the way, so as shown in FIG.
After pushing into the cavity 410', the two-pronged locking pin 408
are inserted into the through holes 4.06' and 407'. Locking bottle 4
08 is in contact with the upper surface of the flat plate part 413 of the bottle 403, and the bottle 4
03 is held in the state shown in FIG. This will cause the bin 40
2,404 can be used to bend a flat metal plate in the manner described above.

As described above, in the press working method of the present invention, a plurality of holes are formed on the bending line of a plastic flat plate, a plurality of bottles provided at the bottom of the groove of the die are inserted into each of the holes, and then the plastic flat plate is punched. Since the plastic plate is bent, it is easy to align the plastic plate and the edge layer at the bending position can be improved, especially when the plastic plate is easily bent or the bending line is in various directions. Extremely effective.

Note that the shape of the groove of the die is not limited to the above embodiment, and various modifications such as a U-shaped groove die are possible. In that case, if a bin is provided on the bending center line at the bottom of the groove of the die, the bending can be performed along a desired line. Further, instead of having a structure in which the bottle enters the inside of the die by the pressing force, the bottle may be fixed and a hole may be provided in the portion of the punch that corresponds to the bottle.

[Brief explanation of the drawing]

1 and 2 are a partial perspective view and a partial side view, respectively, of a press brake used in the press working method of the present invention. FIG. 3 is a sectional view of one embodiment of a die used in the press working method of the present invention. FIGS. 4 and 5 are a perspective view and a front view, respectively, of other embodiments of a die used in the press working method of the present invention. 1: Punch, 3: Metal flat plate, 6,401: Die, 4.
5: hole, 7: groove. 8.9,402,403. 4o4: Bin Applicant: Yokogawa-Heuret-Pancard Co., Ltd. Agent, Patent Attorney
Continued from page 1 by Tsugu Hasegawa @ Inventor John Ecchi φ pie Amerin Street Internal Power Palo Alto Hanover, California, United States 3000 Heuret Paracard Company,...
3032i

Claims (1)

[Claims] A press working method in which a plurality of holes are provided on a bending line of a plastic flat plate, a plurality of pins provided at the bottom of a groove of a goo are inserted into each of the plurality of holes, and then the plastic flat plate is bent with a punch.