JP2002172427A - Bending machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a bending machine that is devised able to finely transform a shape of the bending edge of a bending die. SOLUTION: A bending machine so composed that a plate stock W crimped and fixed by pressing dies 3, 5 is bent by the bending die, and a plurality of pressing means M capable of finely transforming the shape of the bending edge 29 of the bending die 31 abutting on the plate stock W, at the time of a bending motion, are provided in the longitudinal direction of the plate stock W.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bending machine configured to bend a plate material held and fixed by a holding die with a bending die.

[0002]

2. Description of the Related Art When a bending material is pressed against a plate material clamped and fixed by a holding die, and the plate material is bent into a predetermined shape following the bending metal material, the center of the plate material in the longitudinal direction is near the longitudinal center. The bending angle is not the same between the left and right ends in the longitudinal direction, and the bending angle near the center in the longitudinal direction is smaller than the bending angle near the left and right ends in the longitudinal direction. In order to eliminate such a non-uniform bending angle, a plurality of spacers having different thicknesses are provided between the bending die holder and the rear surface of the bending die in which the bending die is detachably mounted. It has been conventionally practiced to form the bending mold with a slight convex curved surface in the longitudinal direction by using the spacer.

[0003]

The degree of the non-uniformity of the bending angle varies depending on the rigidity of the plate material, the thickness of the plate material, the length of the bending, and the like. In this case, it is necessary to change and adjust the thickness of the spacer. However, the operation of changing and adjusting the thickness of the spacer each time according to the rigidity of the plate material, the thickness of the plate material, the bending length, etc., requires a lot of man-hours. The bent mold is used as it is in a plurality of cases. As a result, the accuracy of the bending process cannot be improved to a limited value.

An object of the present invention has been proposed in view of the above-mentioned conventional problems. A bending and adjusting operation in which a change and adjustment operation requires a small number of steps and a vertical pressing force by a bending mold can be adjusted. Machine.

[0005]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention relates to a bending machine configured to bend a plate material clamped and fixed by a holding die with a bending die. The bending machine is characterized in that a plurality of pressing means for pressing a force in a direction perpendicular to the bend beam are provided in the longitudinal direction of the plate material.

[0006]

When each of a plurality of pressing means provided in the longitudinal direction of the plate is operated, the bending mold is pressed by the pressing means to adjust the pressing force in the longitudinal direction. Therefore, the plate material is adjusted so that the vicinity of the center in the longitudinal direction in the longitudinal direction of the plate material is slightly protruded with respect to the vicinity of the left and right ends in the longitudinal direction. In the plate material bent in a predetermined shape following the mold, the bending angle is adjusted to be almost the same at any position such as near the center in the longitudinal direction in the longitudinal direction of the plate material or near the left and right end portions in the longitudinal direction. You.

[0007]

Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a vertical sectional front view showing a main part of the bending machine, and FIG. 2 is a view taken in the direction of the arrow II in FIG.
1 and 2, a lower holding die 3 is detachably fixed to an apparatus frame 1 (only a part is shown in FIG. 1) of the bending machine via a holding die holder 5. The upper holding die 7 corresponding to the above is detachably attached to a piston rod 11 of a holding cylinder 9 provided on the apparatus frame 1 via a holding die holder 13. Due to the operation of the piston rod 11 of the presser cylinder 9, the upper presser die 7 moves between the lower presser die 3 and the plate material W.
And fix it.

[0008] Guide section 1 formed on apparatus frame 1
5, a bend beam 17 is provided movably in a direction perpendicular to the plate material W, and the bend beam 17 is attached to a piston rod 21 of a pressing cylinder 19 fixed to the apparatus frame 1. In the bend beam 17,
A flat mounting surface 27 is formed parallel to the guide surfaces 23 and 25 of the guide portion 15, and a bending die 31 having a bent edge 29 at the tip end is joined to the mounting surface 27 with the end 33. And is attached to the bend beam 17 by pressing means M. Piston rod 21 of pressing cylinder 19
With the operation described above, the bent edge 29 presses the plate material W (which is sandwiched and fixed between the upper pressing die 7 and the lower pressing die 3), and the plate material W is bent into a predetermined shape following the bent edge 29. .

The pressing means M is provided at the bending edge 29 of the bending mold 31.
In order to change the vertical pressing force applied to the bending die 31, an example is shown in FIG.
A plurality of (four in the illustrated example) mold-side wedges 37 joined together by 35 and a wedge surface 41 of a wedge surface 39 of the mold-side wedge 37
The rear end 43 abuts against the mounting surface 27, and the side surface 44 is adjusted by an adjusting wedge 45 abutting on the planar side surface 46 of the bend beam 17 and a piston rod 47 connected to the adjusting wedge 45. The adjustment wedge 45 is bent to bend the beam 1
7, a mold fixing cylinder 51 for fixing the bending mold 31 to the bend beam 17, and a bending rod 31 and an adjusting wedge 45 by a piston rod 53 connected to the bending mold 31. And a mold coupling cylinder 55 that couples the two. The fixing block 59 connected to the piston rod 57 of the mold fixing cylinder 51 is inserted into a block storage hole 61 provided in the bending mold 31, and the piston rod 57 is
1 is inserted into the rod insertion hole 63 formed so as not to hinder the movement operation of the bending die 31 by the die coupling cylinder 55 (the piston rod 57 of the die fixing cylinder 51 is free). .

The piston rod 5 of the mold coupling cylinder 55
3, the adjusting wedge 45 is connected to the bending die 31, the piston rod 57 of the die fixing cylinder 51 is left free, and as shown in FIG.
If the rear end 43 of the adjusting wedge 45 is brought into contact with the mounting surface 27 by retracting the piston rod 47 of the wedge fixing cylinder 49, no pressing force is generated on the bending mold 31 by the adjusting wedge 45. In this state, when the piston rod 47 of the wedge fixing cylinder 49 is made to protrude as shown in FIG.
The side surface 44 of the adjustment wedge 45 swings, and the adjustment wedge 45 moves, and the wedge surface 39 of the mold side wedge 37 and the wedge surface 4 of the adjustment wedge 45
Due to the wedge action with 1, the mold side wedge 37 presses the rear part of the bending mold 31 toward the bending edge 29. Adjusting wedge 45
The bent edge 29 at the position where the pressing force is generated is elastically deformed, and the bent edge 29 at the position where the pressing force is generated is finely projected in proportion to the value of the pressing force. become.

Next, the bending operation according to the above embodiment will be described. First, the vicinity of the center 29a in the longitudinal direction of the bending edge 29 of the bending mold 31 is defined by the left and right end portions 29 in the longitudinal direction.
b and 29c are deformed so as to protrude slightly. For this purpose, the left and right ends 29b, 29c in the longitudinal direction are provided.
In the vicinity, as shown in FIG. 3, the piston rod 53 of the mold connecting cylinder 55 and the piston rod 57 of the mold fixing cylinder 51 are kept free, and the piston rod 47 of the wedge fixing cylinder 49 is pulled in for adjustment. The rear end 43 of the wedge 45 abuts against the mounting surface 27, and then the mold coupling cylinder 5
5, the piston rod 53 of the mold fixing cylinder 51 and the piston rod 57 of the mold fixing cylinder 51 are both retracted, the mold side wedge 37 is connected to the bending mold 31, and the bending mold 31 is fixed to the bending bend beam 17, In this vicinity, the pressing force of the adjusting wedge 45 is not generated.

On the other hand, near the center 29a in the longitudinal direction, first, the piston rod 53 of the mold coupling cylinder 55
When the piston rod 47 of the wedge fixing cylinder 49 is protruded as shown in FIG. 4 with the piston rod 57 of the mold fixing cylinder 51 being free, the adjusting wedge 45 moves to move the mold side wedge 37. Wedge surface 39 and wedge surface 4 of adjustment wedge 45
Due to the wedge action with 1, the mold side wedge 37 presses the rear part of the bending mold 31 toward the bending edge 29. Next, the piston rod 53 of the mold coupling cylinder 55 and the piston rod 57 of the mold fixing cylinder 51 are both retracted, the mold side wedge 37 is coupled to the bending mold 31, and the bending mold 31 is bent. Fixed to. As a result, a pressing force is generated in the bending mold 31 by the adjusting wedge 45 in the vicinity of the center 29a in the longitudinal direction, and the bending edge 29 is located near the left and right ends 29b and 29c in the longitudinal direction where no pressing force is generated. The bending edge 29 at the position where the pressing force is generated is elastically deformed and minutely protrudes in proportion to the value of the pressing force as illustrated in FIG.

In this way, the vicinity of the center 29a in the longitudinal direction of the bending edge 29 of the bending mold 31 is moved to the left and right ends 29b, 29 in the longitudinal direction.
The sheet material W is pressed by projecting the piston rod 21 of the pressing cylinder 19 while projecting and deforming minutely in the vicinity of c. The plate material W is bent into a predetermined shape following the bent edge 29, and the vicinity of the center 29 a in the longitudinal direction in the longitudinal direction of the bent edge 29 and the vicinity of the left and right end portions 29 b and 2 in the longitudinal direction.
In any position such as 9c, the bending angle is almost the same.

As in the prior art, when a plate material is pressed by using a bending die formed on a straight bending edge in the longitudinal direction and the plate material is bent into a predetermined shape following the bending edge,
In the longitudinal direction of the plate material W, the bending angle is not the same in the vicinity of the center in the longitudinal direction and in the vicinity of the left and right ends in the longitudinal direction, and the vicinity of the center in the longitudinal direction is smaller than the bending angle in the vicinity of the left and right ends in the longitudinal direction. However, when the plate material W is pressed by the bent edge 29 deformed and deformed in the vicinity of the center in the longitudinal direction finely, the plate material W bent in a predetermined shape following the bent edge 29 The bending angle is almost the same at any position in the longitudinal direction, such as near the center 29a in the longitudinal direction and near the left and right end portions 29b, 29c.

As described above, the shape deformation operation of the bending edge 29 of the bending die 31 can be easily performed by operating the die coupling cylinder 55, the die fixing cylinder 51, and the wedge fixing cylinder 49. Moreover, the shape deformation operation of the bent edge 29 is performed finely.

As shown in FIG. 5A, the mold side wedge 37 and the adjustment wedge 45 adjust the sliding amount at the center as shown in FIG.
As shown in (B), if the length is formed so as to be larger than the sliding amount at the end, the adjustment becomes easy.

The present invention is not limited to the above-described embodiment, but can be embodied in other modes by making appropriate changes.

[0018]

As described above, according to the bending machine of the present invention, by operating a plurality of pressing means disposed in the longitudinal direction of the plate material, respectively, near the center of the plate material in the longitudinal direction in the longitudinal direction. Is deformed to a state where it protrudes slightly with respect to the vicinity of the left and right ends in the longitudinal direction, and when the plate material is pressed by the deformed bent edge, the plate material bent into a predetermined shape following the bent edge becomes At any position in the longitudinal direction of the plate, such as near the center in the longitudinal direction or near the left and right ends in the longitudinal direction, the bending angles are almost the same, and the plate is bent into a desired shape. As described above, the shape deformation operation of the bending edge of the bending mold is easily performed by the pressing means, and moreover,
It can be performed finely.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional front view showing a main part of an embodiment of a bending machine according to the present invention.

FIG. 2 is a view in the direction of arrow II in FIG.

FIG. 3 is a longitudinal sectional front view showing a main part of the embodiment of FIG. 1 showing a state in which a piston rod of a wedge fixing cylinder is retracted.

FIG. 4 is a longitudinal sectional front view showing a main part of the embodiment of FIG. 1 showing a state in which a piston rod of a wedge fixing cylinder is projected.

FIG. 5 is an example of a relationship between a mold side wedge and an adjustment wedge.

[Explanation of symbols]

 3 Lower Pressing Type (Pressing Type) 7 Upper Pressing Type (Pressing Type) 29 Bending Edge 31 Bending Mold W Plate Material M Pressing Means

Claims (1)

[Claims] 1. A bending machine configured to bend a plate material clamped and fixed by a holding die with a bending die, wherein the pressing means for pressing a force in a direction perpendicular to the bend beam is provided. Characterized in that a plurality of bending machines are provided in the longitudinal direction of the bending machine.