JPS6029570B2 - Bending processing equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a bending device for bending a workpiece into a V-shape, in which the auxiliary upper die is separated from the upper die main body, making it easy to change several types of bending angles. To provide a bending machine which can perform a bending process, significantly narrow the operating range when retracting an auxiliary upper die, do not hinder the attachment of other processing tools, and completely eliminate danger to workers. It is an object.

There is known a bending device in which an auxiliary upper mold that can be reversed is provided on the rear or front and rear surfaces of the upper mold at the tip of the ram, and several types of angle bending can be performed by combining both upper molds. The reversible auxiliary upper die of this type of conventional equipment is
Since it is pivoted in a straight line on the rear surface of the ram and rotated by the drive of the hydraulic cylinder rod, the length of the auxiliary upper mold becomes the operating radius at the time of reversal, and therefore, within that range. Not only is this inconvenient because it is not possible to attach processing tools such as a punch unit, but it is necessary to install a large hydraulic cylinder, and when an auxiliary upper die that reverses is provided on the front of the ram, it is necessary to perform a large reversing operation. It had drawbacks such as exposing workers to dangerous fog. In the present invention, the auxiliary upper mold is not a reversible type, but the auxiliary upper mold is attached to the extension of the rotating link of the four-decoration link mechanism, and the auxiliary upper mold is attached to the upper mold main body by the pressing force of the hydraulic cylinder mechanism, and the auxiliary upper mold is attached to the upper mold body using hydraulic As the cylinder mechanism is pulled up, the four-piece link mechanism is rotated, and the auxiliary upper mold is raised and retreated in a state substantially parallel to the ram surface, and is moved to the upper limit of rotation, so that the operating range can be significantly reduced.

In this way, the auxiliary upper die moves up and back without being reversed, making it possible to approach the lower die and attach other processing tools such as a punch unit, and even when the auxiliary upper die is attached to the front of the ram. The worker is not endangered when the auxiliary upper mold approaches and separates, and the driving hydraulic cylinder can also be made smaller. Next, the configuration of the present invention will be explained with reference to the drawings.

The present invention is suitable for bending a workpiece plate according to a specific program. A base plate 2 is mounted on top of the base plate 2, which is movable in the left and right directions in FIG. The lower mold 3 may be flat in the longitudinal direction of the bed (perpendicular to the plane of the paper in FIG. ) may be used to slightly protrude the longitudinal center of the bed, thereby creating a mid-height shape that is curved toward both ends.By creating a mid-height shape in this way, the upper mold that occurs when pressurizing Alternatively, by absorbing the distortion caused by the pending lower die, it is possible to prevent the occurrence of warping in the longitudinal direction of the workpiece plate and perform bending with high precision.In the illustrated embodiment, an auxiliary upper die 8 The figure shows the case where is installed.

That is, a bracket 9 is provided at the rear of the ram 6, a four-decoration link mechanism 10 is attached thereto, and a hydraulic cylinder 20 is attached as its driving mechanism. Four-bar linkage mechanism 101 first
link 11, second rotating link 12, third link 1
3, and axes 15, 16, 17, which are the rotation pairs of each link.
It consists of 18.

The first link 11 is supported by a shaft 15 supported by a bracket 9, and is connected to the tip of the piston rod 19 of the hydraulic cylinder 20 by providing a pin 14 on the outside of the line connecting the shafts 15 and 16. There is. The second link 12 is an extension 12
a, and use the bolts 25 and 26 here to attach the auxiliary upper mold 8.
is firmly attached. The third link 13 is interposed between the shaft 18 supported by the bracket 9 and the shaft 17 of the second link 12, and has a long length on the shaft 18 side to absorb minute movement when the link rotates. A hole 24 is formed. Further, a holding portion 22 is formed at the tip of the first link 11, and comes into contact with a receiving portion 23 formed on the upper surface of the second link 12 when the link mechanism rotates at its lower limit. Note that the bracket portion between the first shaft 15 and the fourth shaft 18 is a fixed link with seven ornaments. Note that the hydraulic cylinder 20 is pivotally mounted on a pin 21 provided at the upper end of the bracket 9. FIG. 1 shows a case where the auxiliary upper mold 8 is brought into close contact with the upper mold 7 to perform a bending process of, for example, 60 degrees.

In this state, the piston rod 19 of the hydraulic cylinder is extended, and the four-bar linkage mechanism 10 is at its lower limit of rotation. That is, the fourth link 13 has rotated inward from the line connecting the shafts 18 and 16 and is in a position past the dead center, and the presser part 22 at the tip of the first link 11 is The receiving portion 23 of the link 12 is pressed down to maintain the close contact between the two molds.
When the ram 6 is lowered in this state, the workpiece plate 27 can be bent by, for example, 60 degrees as shown by the chain line. Next, pressure is applied to the back side of the hydraulic cylinder 20 and the piston rod 1
9 is contracted and the first link 11 is rotated in the direction of the rebound indicator, the ball 16 follows a trajectory 28 and the cutting edge of the auxiliary upper mold 8 rotates via a trajectory 29, as shown in FIG. .

The auxiliary upper mold 8 moves up and back on the rear surface of the ram 6 substantially parallel to the ram surface. At this time, the third link 13 acts so that the third link 13 rotates smoothly due to the hole 24. FIG. 4 shows the state in which the auxiliary upper mold 8 has reached its rising end.

The auxiliary upper mold 8 is housed in a forward-leaning position close to the rear surface of the ram, and even if there is another processing tool such as a punch unit near the lower mold during reciprocation of the ram, it is kept in the smallest shape to avoid contact. It is being raised. In this way, the upper mold 7 can be bent at an angle of, for example, 50 degrees. When the auxiliary upper die 8 is rotated, the auxiliary upper die moves as shown by the trajectory 29 in FIG. 4, so it does not require a large space.
Furthermore, by extending the piston rod 19 from the state shown in FIG. 4, it is possible to return to the state shown in FIG. 1 by retracing the previous process. In the illustrated embodiment, the auxiliary upper die 8 supported by four decorative links is attached to the rear surface of the ram 6, but it is possible to attach a similar mechanism to the front surface.

Further, the auxiliary upper die 8 can be replaced with an auxiliary upper die 8 having a different angle by loosening the bolts 25 and 26. As described above, according to the present invention, the auxiliary upper mold is not reversible, but is raised and rotated in a state substantially parallel to the ram surface by means of a four-decoration link mechanism, so that the upper mold body of the auxiliary upper mold is It is possible to reduce the operating range required for the Ayaji, the attachment of other processing odors in close proximity to the lower die will not be a problem, and the hydraulic cylinder for driving can be made relatively small.

Furthermore, even if the auxiliary upper mold is attached to the front surface of the upper mold main body, the operating range is small due to parallel movement, so there is no danger to the operator when the auxiliary upper mold rotates.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which Fig. 1 is a side view showing a section of a part of the bending processing device, Fig. 2 is a sectional view taken along the Rollo line in Fig. 1, and Fig. FIG. 4 is a side view showing the auxiliary upper mold in the middle of its upward and backward movement, and FIG. 1...Bed, 3...Lower mold, 6...
...Ram, 7...Upper die, 8...Auxiliary upper die, 10...4 Decorative link mechanism, 19...
Piston rod, 20... Hydraulic cylinder. Figure - Figure 2 Figure 3 Figure 4

Claims (1)

[Scope of Claims] 1. Consists of an upper die attached to the lower end of the ram that is movable in the vertical direction, and a lower die placed on the upper surface of the bed. be done 4
A nodal link mechanism is installed, and an auxiliary upper mold is attached to the extension of the rotation link of the link mechanism, which is in close contact with the upper diameter at the lower limit of rotation and moves upward and backward almost parallel to the ram surface from the lower limit of rotation to the upper limit. A bending processing device characterized by being provided with. 2. The folding device according to claim 1, wherein the four-bar link mechanism passes the dead center at the lower limit of rotation and maintains the auxiliary upper mold in close contact with the upper mold.