JPS595453Y2 - folding machine - Google Patents

Description

[Detailed explanation of the invention] This invention is equipped with a rotary die with a groove at the lower end of the ram, which allows for right-angle bending without the workpiece being raised up, and moreover, it can be bent quickly without reversing the workpiece. The object of the present invention is to provide a bending device that can perform two bends.

With conventional bending machines, if you perform edge bending such as a right angle gap or an acute angle bend between the lower mold (die) and the upper mold (punch), the workpiece will jump up to the front, which is dangerous. In the case of double bending, the workpiece must be turned over after edge bending, which is complicated and requires skill.

The present invention eliminates the above-mentioned drawbacks by using a rotating upper die that performs right-angle spacing while rotating after touching the workpiece by lowering the ram.

Next, the present invention will be specifically explained with reference to the drawings.

As shown in FIG. 1, the folding machine has a lower mold assembly 1 which is disposed slidably in the front and back direction (horizontal direction in FIG. have.

The lower mold assembly 1 consists of a base 2 having a sloped upper surface, a block 4 placed on the base 2 via a wedge piece 3 for adjusting the level or the center height of the bending line, and It consists of a lower mold body 5 attached to the front part.
has V-shaped working grooves 7a, 7b, and 7C, and has a screw hole 9 for tightening and fixing to the block 4 using a bolt 8.

As will be described later, the rear part of the block 4 guides the projecting portion 18 of the movable upper die 13 which is reversibly attached behind the fixed die 11, and serves as a relief for the bending rotation of the workpiece bending piece 31. A recess 6 is formed.

The upper assembly 10 is attached to the lower part of the ram (not shown), and includes a fixed mold 11 for acute angle bending in the center, a first movable upper mold 12 that is inverted and hangs in front of the fixed mold 11, and
It consists of a second movable upper mold 13 which is inverted behind the fixed mold 11 and is of a vertically rotating type.

These movable upper molds 12, 13 can be reversely driven forward or backward from the illustrated state by a reversing mechanism (not shown).

The second movable upper mold 13 has bolts 15 under the holder 14.
A support body 16 that supports the rotary mold 20 is attached using a rotary mold 20, and a circular arc-shaped recess 1 is provided in the longitudinal direction along the bending line of the support body 16 at a position facing the lower mold at the lower part of the support body 16.
7 is formed, and an overhanging portion 18 is provided adjacent to the four arcuate portions 17 in contact with the vertical guide surface 6a of the recess of the lower mold block 4. A concentric arcuate groove 19 is formed.

In the illustrated embodiment, the projecting portion 18 is separate from the arcuate portion of the support 16 and is fixedly tightened using bolts 25.
6 may be integrally formed.

The arcuate recess 17 is opened downward as shown in FIG. 1, and the straight line distance connecting both edges of the opening is smaller than the diameter of the arcuate recess 17.

A rotary mold 20 having a substantially semi-cylindrical shape and a V-shaped groove 21 in its flat portion is fitted into the arcuate recess 17 thus formed.

As shown in FIG. 2, there are screws 22 on both end faces of the rotary mold 20.
The guide plate 23 is attached using the guide plate 23, and the arcuate protrusion 24 formed on the upper part of the guide plate 23 is engaged with the arcuate groove 19 of the support body 16.

In addition, it is preferable to attach a cover (not shown) to the end face of the support body 16 and provide stopper pins 26 and 26 protruding from the inner side of the cover so as to correspond to the side surface of the guide plate 23 to regulate the rotation angle of the rotary mold 20.

Instead of the pin 26 on the cover side, a stopper may be directly embedded in or near the arcuate groove system path, and the width or depth of the arcuate groove 19 may be stepped or reduced without using a pin to adjust the rotation angle. may be regulated.

Next, the operation of the above-mentioned bending machine will be explained.

A plate material (work) 30 to be processed is placed on the lower die main body 5, and the protruding distance from the bending position is regulated by an abutment piece (not shown) on the back side, and then the ram is lowered.

As shown in FIG. 1, the lower part of the ram has movable upper molds 12 and 13 in close proximity to the front and rear of the central fixed mold 11, so when the ram reaches the level of the workpiece 30 as it descends, the rotary mold 20
is rotated in the direction of arrow 33 to perform a predetermined edge bending.

The rotary mold 20 fitted into the arcuate recess 17 of the support 16 of the movable upper mold 13 is supported by the projections 24 of the guide plate 23 at both ends and the arcuate groove 19, and its center of rotation is the lower mold main body. 5, so even if the right acting part 27 of the rotary type touches the workpiece 30 first due to the lowering of the ram, it does not immediately perform the bending action and bends the workpiece 30.
After the left acting part 28 in FIG. 1 touches the workpiece 30 and the rotary mold 20 is prevented from rotating to the left, the rotary mold 20 is rotated in the direction of the arrow 33 in FIG. Bend the edge of the workpiece as shown by the chain line.

As shown in the figure, the corners of the lower die main body 5 are made at slightly more acute angles than 90° in consideration of springback.

This rotation of the rotary die 20 causes the bending piece 31 on the edge of the workpiece to
The bending and rotation can be carried out without any hindrance within the recess 6 of the lower die block 4.

Further, during bending, the protruding portion 18 of the support comes into contact with the vertical guide surface 6a of the recess to correctly lower the rotary mold 20 and support the bending reaction force.

FIG. 3 shows the ram being raised after the bending is completed, and the rotating die 20 is rotated to the right and raised to the open height position.

Next, when bending the workpiece 30 at a right angle in the direction opposite to the bending piece 31, the movable upper mold 13 including the rotary mold 20 is reversed, the lower mold assembly 1 is slid, and the lower mold main body is bent. 5 to the position of the movable upper die 12 for right-angle bending, determine the protruding distance from the bending position, and lower the ram to make the second fold as shown in FIG. Bending piece 3
2 can be folded.

In this way, even during the Z-bending process in which the second bent piece 32 is formed in the opposite direction to the first bent piece 31, the workpiece 3
It is possible to process quickly by simply shifting the workpiece to the same plane without reversing the zero.

As mentioned above, in the present invention, the movable upper mold is provided with a rotatable mold having a V-shaped groove for lower folding, and the lower mold is provided with a rotary mold that guides the overhang of the upper mold to apply a bending reaction force. Since a supporting recess is formed, it is safe because right angle bending can be performed without causing the work to rebound, and when performing MakZ bending, it is only necessary to move on the same plane and perform the second right angle bending, Bending can be performed quickly and easily without the need for reversing the workpiece.

[Brief explanation of drawings]

FIG. 1 is a side view of the bending machine, FIG. 2 is a sectional view of the rotary mold part, FIG. 3 is a side view of the upper mold being raised, and FIG. 4 is a side view during Z bending. 1...Lower mold assembly, 2...Base, 3
...Wedge material, 4...Block, 5...
... Lower mold body, 6 ... Recess, 10 ...
・Upper mold assembly, 11...Central fixed mold, 12...
...First movable upper mold, 13... Second movable upper mold, 14... Upper mold holder, 16...
・Support body, 17... Arc-shaped recess, 18...
... Overhanging portion, 19 ... Arc-shaped groove, 20 ...
... Rotating type.

Claims (1)

[Scope of utility model registration request] It consists of an upper mold assembly provided on the ram of the bending machine and a lower mold assembly disposed on the upper surface of the bed, and the upper mold assembly is capable of being reversed to at least one of a central fixed mold. A movable upper mold is provided, and an arc-shaped recess with an arcuate cross section that opens over almost the entire length in the longitudinal direction is provided at a position facing the lower mold in the lower part of the movable upper mold. A rotary mold is rotatably fitted and supported in the arcuate center layer of the arc-shaped recess, a V-shaped groove for lower folding is formed in the flat part of the rotary mold, and a circular groove is formed in the movable upper mold. An overhang is provided adjacent to the arcuate recess, and on one side of the lower mold,
A folding machine characterized in that a recess is formed for guiding the projecting portion and supporting a bending reaction force during folding.