JP3531392B2 - Angle material bending machine - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an angle material bending machine that bends an angle material by power such as hydraulic pressure.

[0002]

2. Description of the Related Art Angle members such as equilateral angle steel and unequal angle steel are provided with R at the inner corners, and the larger the size, the greater the R. For example, if the angle is made of steel and the width of one side is 30 mm, R is 4 mm, 100
In the case of mm, R is 10 mm.

As shown in FIG. 9, an angle member bending machine for bending an angle member 17 having a V-shaped notch formed on one side around the apex of a V-shaped notch portion 17a to form an angle is a convex center member. When the angle member 17 is bent, it is V
The notch 17a has an end flat surface that prevents it from being deformed (displaced) inward, and the corner ridge line formed by the angled slope 21d and the end flat 21e interferes with the inner corner R of the angle member 17 having the maximum working size. The male mold 21 provided with a chamfer slightly larger than the corner R and the female mold 22 facing the male mold 21 and having a concave valley line 22a in the center are disposed to prevent the male mold 21 from being bent, as shown in FIG. V-shaped notch 17 between male and female 22
The angle member 17 in which a was processed was inserted, and the male mold 21 or the female mold 22 was moved by power such as hydraulic pressure, and was bent as shown in FIG.

[0004]

In the conventional angle material bending machine, the chamfering of the ridge line of the corner formed by the angled slope 21d and the end plane 21e is provided in accordance with the angle material 17 having the maximum processing size. When machining a small angle member 17, the contact length between the angle member 17 and the convex ridge line 21c becomes short, and the distance between the V-shaped notch 17a of the angle member 17 and the convex ridge line 21c that is the pressing point is small. Since it becomes large, the deformation at the time of bending becomes large, which causes the accuracy to deteriorate. Therefore, generally, a plurality of male dies 21 or male dies 21 and female dies 2 having different chamfering sizes are used.
A bending die consisting of 2 is prepared, and it is used by exchanging each time according to the size of the angle member 17, which not only increases the cost but also the trouble of exchanging the male die or the die,
It has been a cause of reduced work efficiency.

The object of the present invention is to solve the above-mentioned problems of the prior art and to perform accurate bending in one male die (die).
It is an object of the present invention to provide an angle material bending machine that can cope with a plurality of angle material sizes at low cost and improve the operability of bending.

[0006]

SUMMARY OF THE INVENTION The above object is, two chevron
Convex ridges located between the slope and the mountain slope, and the mountain slope
And two end planes orthogonal to the convex ridge
Male type and female type with a concave valley line in the center facing the male type
And has a male type or female type moved by power such as hydraulic pressure.
Then, bend the angle material placed between the male and female molds
Angle angle bending machine
A chamfer or corner R is provided between the flat surface and the chamfer.
Or the corner R has different sizes on one end side and the other end side.
And with the male mold rotated 180 degrees with respect to the female mold
This is achieved by making it holdable.

Further, the switching fixing means rotatably supports the male mold so that the starting end and the terminating end of the male convex ridge line are switched, and the male convex ridge line and the female concave valley line are aligned. This is achieved by providing holding means for holding the male mold at the position where

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described with reference to FIGS. 1 is a central sectional view of a bending die, FIG. 2 is a perspective view of an angle material bending machine having a bending die, and FIG. 3 is a partial side view of a male die in which an angle material having a width of 65 to 80 mm is set. FIG. 4 is a partial side view of a male mold in which an angle member having a width of 25 to 30 mm is set, FIG. 5 is a side sectional view of the holder and the male mold, and FIG. 8 is a view of the holder and the male mold when the male mold is rotated by 180 °. It is a side sectional view.

In FIGS. 1 and 2, a bending die 11 for bending an angle member having a V-shaped notch formed on the lower side of the opening of a C-shaped frame 14 having an opening at the center.
The ram 1 which pushes down the rod 10 of the bending mold 11 by operating the hydraulic pump in the frame 14 (not shown) by stepping on the foot switch 13 connected to the main body.
2 is provided above the opening of the frame 14.

The structure of the bending die 11 will be described with reference to FIG. A housing 19 is arranged on the base 18, and oil is enclosed in the housing 19. The rod 10 and the piston rod 9 are arranged at a right angle, and the piston rod 9 moves horizontally in conjunction with the vertical movement of the rod 10. Move to. A U-shaped holder 3 is fixed to the housing 19, and a piston rod 9 is slidably pierced at one end thereof. The piston rod 9 is provided with a female die 2 having a concave valley line in the center, and the other end of the holder 3 has a mountain-shaped slope 1d due to the central convex ridge line 1c, and an end portion orthogonal to the convex ridge line 1c. Plane 1
A male mold 1 having chamfers 1a and 1b of different sizes at both ends is provided at a corner ridge line having a mountain-shaped slope 1d and an end plane 1e at both ends and facing the female mold 2. Has been. Further, in the central portion of the holder 3 (near the middle of the male die 1 and the female die 2), a material receiver 7 for supporting the angle member is provided.
Is arranged so as to be vertically movable according to the size of the angle member, and is fixed in position by the knob bolt 8.

The holder 3 is provided with a stepped hole 3a, and the stepped shaft 4 is rotatably supported in the stepped hole 3a through a spring 5 and is engaged with the male die 1. There is. Further, the pin 6 is attached to the contact surface of the male die 1 with the holder 3.
And a hole 3b corresponding to the pin 6 is provided in the holder 3 so that the male die 1 is held at a desired position. Therefore, pull the male die 1 horizontally as shown in FIG.
When the pin 6 is removed from the hole 3b of the holder 3, the male die 1 becomes rotatable about the stepped shaft 4 as a fulcrum as shown in FIG. 7, and when the chamfer 1a or 1b of the male die 1 is on the upper side, that is, FIG. And only in the case of FIG. 8, the pin 6 is fitted into the hole 3b of the holder 3 and the male die 1 is fixed. The holding means for holding the male die 1 is composed of the pin 6 and the hole 3b of the holder 3.

In the above structure, one side has a length of 65 to 8
A processing operation will be described for the case where the angle member 15 of 0 mm and the angle member 16 of 25 to 30 mm are bent.
The Rs at the inner corners of the angle members 15 and 16 having sides of 65 to 80 mm and 25 to 30 mm are 8.5 mm and 4 mm, respectively. Therefore, the chamfer 1a of the corner ridge of the male die 1
Is 8.5 mm and the chamfer 1b is 4 mm.
Further, the angle member is provided with a V-shaped notch 17a shown in FIG. 9 in advance.

First, when bending the angle member 15 having a side length of 65 to 80 mm, the male die 1 is set so that the chamfer 1a of the male die 1 faces upward as shown in FIG. 5, and as shown in FIG. An angle member 15 is provided on the material receiver 7 using a scale not shown.
It is fixed by the knob bolt 8 according to the length of one side.
Next, as shown in FIG. 10, when the angle member 15 is placed on the material receiver 7 and the foot switch 13 is stepped on, the ram 12 descends and the female die 2 moves together with the piston rod 9 via the rod 10 and oil, The angle member 15 is pressed and bent as shown in FIG.

Next, when bending the angle member 16 having a side length of 25 to 30 mm, as shown in FIGS.
Is pulled and rotated, and the male die 1 is set so that the chamfer 1b of the male die 1 faces upward as shown in FIG. As shown in FIG. 4, the material receiver 7 is provided with an angle member 1 from a scale (not shown).
Fix it with the knob bolt 8 according to the length of one side of 6,
To process.

Thereby, the angle member 1 to be bent
The contact length of the convex ridgeline of the male die 1 that matches the size of the angle member is optimized by switching the start end and the end of the convex ridgeline 1c of the male die 1 according to the sizes of 5 and 16. be able to.

[0016]

According to the present invention, in the angle material bending machine, the start edge and the end edge of the convex portion are formed on the corner ridge line formed by the male angled slope and the end plane where the inner corner R of the angle material interferes. Since chamfers of different sizes are provided, the male convex ridge line that matches the size of the angle material can be selected by switching the start and end of the male convex ridge line according to the size of the angle material to be bent. Since the contact length can be optimized, deformation during bending can be prevented, and accurate processing can be performed. Further, it is not necessary to prepare a plurality of male dies or bending dies, and thus it can be provided at low cost. Furthermore, the male mold is rotatably supported so that the start and end of the male convex ridge line are switched, and the male mold is held at the position where the male convex ridge line and the female concave valley line are aligned. Since the holding means is provided, it is possible to easily switch the starting end and the ending end of the ridgeline of the male convex portion, and improve the operability.

[Brief description of drawings]

FIG. 1 is a side sectional view of a bending die showing an embodiment of the present invention.

FIG. 2 is a perspective view of an angle material bending machine having a bending die.

FIG. 3 is a partial side view of a mold in which an angle member having a width of 65 to 80 mm is set.

FIG. 4 is a partial side view of a mold in which an angle member having a width of 25 to 30 mm is set.

FIG. 5 is a side sectional view of a holder and a male mold.

FIG. 6 is a side sectional view of the holder and the male mold in a state where the male mold is pulled toward the female mold side.

FIG. 7 is a view on arrow A in FIG. 5 when the male die is rotated.

FIG. 8 is a side cross-sectional view of the holder and the male mold after rotating the male mold by 180 °.

FIG. 9 is a perspective view of a V-shaped notched angle member and a bent angle member.

FIG. 10 is a top view of a mold in which an angle member is set.

FIG. 11 is a top view of a mold obtained by bending an angle member.

[Explanation of symbols]

1 ... Male type, 1a, 1b ... Chamfer, 1c ... Convex ridge line, 1d
Chevron slope, 1e ... end plane, 2 ... female, 3 ... holder, 3
a ... stepped hole, 4 ... stepped shaft, 5 ... spring, 6
... Pins, 11 ... Bending dies, 15, 16 ... Angle materials.

Claims (2)

(57) [Claims] 1. A position between two mountain slopes and the mountain slopes.
The convex ridgeline to be placed on the mountain slope and the convex ridgeline.
And a male mold having two end planes orthogonal to each other, and the male mold
Opposite the and a female die having a recess valley in the center, moving the male or female by the power of the hydraulic or the like, the male
Wherein the angle member bending machine for bending the angle member which is arranged between the female die, the said angular slope with
A chamfer or corner R is provided between the end plane and
The chamfer or corner R has a large difference between one end side and the other end side.
Kisatoshi and rotate the male mold 180 degrees to the female mold
Angle material bending machine characterized by being able to hold it in the rolled state . 2. The male mold and a holder for holding the male mold.
In addition, the male convex ridge line and the female concave valley line are aligned.
The angle material bending machine according to claim 1, wherein a pin and a hole which are fitted at a certain position are provided .