JP2727698B2 - 3D bending type of rotary bender machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial application field) The present invention relates to a rotary bender machine, which is used for forming an automobile frame or the like that requires a three-dimensional bending shape. It is.

(Prior Art) A conventional rotary bender machine applies tension to a work with a hydraulic tension cylinder while rotating a rotary table with a rotary cylinder as shown by A in FIG. 5, and follows the rotation. When the tension post moves to the bender mold, the work is wound around the bender mold and bent, and further, the tension post moves upward to perform three-dimensional bending.

In FIG. 5, reference numeral 10 indicated by a one-dot chain line is a shape formed by bending an automobile frame, 4 is a tension chuck,
Reference numeral 3 denotes a bender type chuck, which applies a tensile force to a work 10 with a tension cylinder 9 and a rotary cylinder 1
Then, the gear 2a is rotated via the rack pinion 1a, and the rotary table 2 is rotated. As a result, the tension post 8 is pulled by the work 10 and moves to the rotary table 2 side, so that the work 10 is wound around the bender die 6 and bent.

In addition, the hinari is turned on by the chinari 4a,
The three-dimensional bending is performed by moving the tension post 8 up and down by the vertical cylinder for post 8a.

(Problems to be Solved by the Invention) However, in order to prevent the deformation of the work when performing the three-dimensional bending with the rotary bender machine, in the three-dimensional bending mold part 7, as shown in FIG. As shown, the three-dimensional bending is performed by setting the nylon liner 13 on the lower inclined portion 7b of the three-dimensional bending die 7.

In this case, the workpiece 10 to be subjected to the three-dimensional bending process has a horizontal lower portion, two convex portions at the upper portion, and a concave side surface.
The lower horizontal portion 10a is easily bent and deformed by tensioning as shown in FIG. 7B. This is because the liner 13 cannot keep up with the tension bending force since the work piece 10 is restrained only by the nylon liner 13, and as a result, the lower tension portion of the work piece 10 is curved as shown in FIG. It will be deformed.

According to the present invention, when a three-dimensional bending process is also performed by a rotary bender machine, in the case of a shape having a concave portion on a side surface of an automobile frame, even when the three-dimensional bending process is performed, the lower horizontal portion of the frame is bent and deformed. A three-dimensional bending mold that does not have any problem is made technically movable.

[Configuration of the invention]

(Means for solving the problem) The technical measures taken to solve the problem are as follows. That is, the rotary bender type body is rotated by the movement of the rotary cylinder, and the work is held by the bender type chuck and the tension chuck. The rotation of the rotary bender type body causes the tension post to move to the bender type and work. Of a rotary bender machine that performs two-dimensional bending and then three-dimensional bending by moving the tension post up and down.
In the three-dimensional bending mold, the three-dimensional bending mold is divided into a plurality of parts to form a divided mold, and the divided mold is fixed horizontally and inclinedly with an adjusting screw in a bending mold holder. This is a three-dimensional bending type of a rotary bender machine in which a matching jig according to the shape of the work is arranged to restrain the work.

(Function) When a three-dimensional bending process is performed on a frame for an automobile, a fitting jig according to the shape of a work is arranged inside a split mold, and the three-dimensional bending is performed by a tension post, thereby dividing the frame. By performing the three-dimensional bending of the frame by the divided mold, the work is completely restrained and bent by the divided jig, so that the three-dimensional bending can be easily performed by overcoming the three-dimensional tension bending force. is there.

Example An example will be described below.

Fig. 1 to Fig. 3 show the rotary
A detailed enlarged view of the bender type, 11 is a three-dimensional bending type.

Reference numeral 5 denotes a two-dimensional bending die, and reference numeral 6 denotes a corner type. The three-dimensional bending die shown in 11 is a split type as shown by 11a, 11b and 11c, which is sequentially arranged in an upper right inclined manner. Are fixed with an adjustment bolt 12 and a nut 13. Thus, the three-dimensional bending die is changed from the integral type to the split type.

FIG. 3 is a sectional view of the split mold 11C shown in FIG.
At 4, an inverted U-shaped split mold 11C is fixed inside with an adjusting screw, and a convex shape fitting jig 16 is fitted inside the split mold to fit the work 10 and the concave part on the side of the cross section of the bender which is the work. The lower side of the bender 10 is a horizontal surface 15 of the split mold 11C
Is securely located.

If the bending is performed by the three-dimensional bending die of the split type, the outer width and the inner width of the work 10 are completely constrained by the die. The work 10 can be restrained by overcoming the dimensional tension bending force, and deformation of the lower surface 10c of the work 10 hardly occurs.

The position of the split mold can be freely adjusted by the bolts 12 and the nuts 13.

In a three-dimensional bending die using a conventional nylon liner 13, adjustment of the three-dimensional bending amount requires filling of the die, but the three-dimensional bending die 11 should also reduce the adjustment time for bending use. Can be done.

〔The invention's effect〕

The present invention has the following effects. That is, since the three-dimensional bending die according to the present embodiment can completely restrain the work, the deformation of the work can be reduced, and the three-dimensional bending die can be adjusted only by the three-dimensional bending amount adjusting bolt.
The amount of dimensional bending can be adjusted, and the setting of the conventional nylon liner that restrains the work is not required, and the number of steps can be reduced.

[Brief description of the drawings]

1 is an external view of a three-dimensional bending die according to the present embodiment, FIG. 2 is a side view of FIG. 1, FIG. 3 is a cross-sectional view taken along line BB of FIG. 2, and FIG. FIG. 5 shows a conventional rotary motor.
FIG. 6 is an explanatory view of a state of restraining a work by a conventional three-dimensional bending die, and FIG. 7 is an external perspective view of the curved work of FIG. A: rotary bender machine, 10: bender (work), 11: three-dimensional bending type, 12: adjusting screw, 14: split holding type, 16: jig.

Claims (1)

(57) [Claims] The rotary post moves a rotary bender type main body to hold a work with a bender type chuck and a tension chuck. The rotation of the rotary bender type main body moves a tension post to a bender type. In a three-dimensional bending die of a rotary bender machine that performs two-dimensional bending of the work and further performs three-dimensional bending by vertical movement of a tension post, the three-dimensional bending die is divided into a plurality of divided die, A rotary bender fixed horizontally and inclinedly with an adjusting screw in the split mold and the split mold holding tool, and further provided with a fitting jig according to the shape of the work inside the split mold to restrain the work. 3D bending machine.